diff options
Diffstat (limited to 'drivers/tty/serial')
46 files changed, 3100 insertions, 1123 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 86c00b1c5583..570df9d2a5d2 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -3062,7 +3062,7 @@ void serial8250_resume_port(int line) */ static int serial8250_probe(struct platform_device *dev) { - struct plat_serial8250_port *p = dev->dev.platform_data; + struct plat_serial8250_port *p = dev_get_platdata(&dev->dev); struct uart_8250_port uart; int ret, i, irqflag = 0; diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c index 916cc19fbbda..5f3bba12c159 100644 --- a/drivers/tty/serial/8250/8250_em.c +++ b/drivers/tty/serial/8250/8250_em.c @@ -95,25 +95,23 @@ static int serial8250_em_probe(struct platform_device *pdev) struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); struct serial8250_em_priv *priv; struct uart_8250_port up; - int ret = -EINVAL; + int ret; if (!regs || !irq) { dev_err(&pdev->dev, "missing registers or irq\n"); - goto err0; + return -EINVAL; } - priv = kzalloc(sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(&pdev->dev, "unable to allocate private data\n"); - ret = -ENOMEM; - goto err0; + return -ENOMEM; } - priv->sclk = clk_get(&pdev->dev, "sclk"); + priv->sclk = devm_clk_get(&pdev->dev, "sclk"); if (IS_ERR(priv->sclk)) { dev_err(&pdev->dev, "unable to get clock\n"); - ret = PTR_ERR(priv->sclk); - goto err1; + return PTR_ERR(priv->sclk); } memset(&up, 0, sizeof(up)); @@ -136,20 +134,13 @@ static int serial8250_em_probe(struct platform_device *pdev) ret = serial8250_register_8250_port(&up); if (ret < 0) { dev_err(&pdev->dev, "unable to register 8250 port\n"); - goto err2; + clk_disable(priv->sclk); + return ret; } priv->line = ret; platform_set_drvdata(pdev, priv); return 0; - - err2: - clk_disable(priv->sclk); - clk_put(priv->sclk); - err1: - kfree(priv); - err0: - return ret; } static int serial8250_em_remove(struct platform_device *pdev) @@ -158,8 +149,6 @@ static int serial8250_em_remove(struct platform_device *pdev) serial8250_unregister_port(priv->line); clk_disable(priv->sclk); - clk_put(priv->sclk); - kfree(priv); return 0; } diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index c52948b368d8..c810da7c7a88 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1565,6 +1565,7 @@ pci_wch_ch353_setup(struct serial_private *priv, #define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021 #define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022 #define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a +#define PCI_DEVICE_ID_AMCC_ADDIDATA_APCI7800 0x818e #define PCI_VENDOR_ID_SUNIX 0x1fd4 #define PCI_DEVICE_ID_SUNIX_1999 0x1999 @@ -1587,8 +1588,8 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { * ADDI-DATA GmbH communication cards <info@addi-data.com> */ { - .vendor = PCI_VENDOR_ID_ADDIDATA_OLD, - .device = PCI_DEVICE_ID_ADDIDATA_APCI7800, + .vendor = PCI_VENDOR_ID_AMCC, + .device = PCI_DEVICE_ID_AMCC_ADDIDATA_APCI7800, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .setup = addidata_apci7800_setup, @@ -4697,8 +4698,8 @@ static struct pci_device_id serial_pci_tbl[] = { 0, pbn_b0_1_115200 }, - { PCI_VENDOR_ID_ADDIDATA_OLD, - PCI_DEVICE_ID_ADDIDATA_APCI7800, + { PCI_VENDOR_ID_AMCC, + PCI_DEVICE_ID_AMCC_ADDIDATA_APCI7800, PCI_ANY_ID, PCI_ANY_ID, 0, @@ -4797,6 +4798,12 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_VENDOR_ID_IBM, 0x0299, 0, 0, pbn_b0_bt_2_115200 }, + /* + * other NetMos 9835 devices are most likely handled by the + * parport_serial driver, check drivers/parport/parport_serial.c + * before adding them here. + */ + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901, 0xA000, 0x1000, 0, 0, pbn_b0_1_115200 }, diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index a1ba94d64885..f3b306efaa59 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -116,6 +116,8 @@ config SERIAL_8250_PCI This builds standard PCI serial support. You may be able to disable this feature if you only need legacy serial support. Saves about 9K. + Note that serial ports on NetMos 9835 Multi-I/O cards are handled + by the parport_serial driver, enabled with CONFIG_PARPORT_SERIAL. config SERIAL_8250_HP300 tristate diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 1456673bcca0..f13624807d12 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -291,13 +291,13 @@ config SERIAL_MAX3100 config SERIAL_MAX310X bool "MAX310X support" - depends on SPI + depends on SPI_MASTER select SERIAL_CORE - select REGMAP_SPI if SPI + select REGMAP_SPI if SPI_MASTER default n help This selects support for an advanced UART from Maxim (Dallas). - Supported ICs are MAX3107, MAX3108. + Supported ICs are MAX3107, MAX3108, MAX3109, MAX14830. Each IC contains 128 words each of receive and transmit FIFO that can be controlled through I2C or high-speed SPI. @@ -1424,8 +1424,8 @@ config SERIAL_AR933X_NR_UARTS to support. config SERIAL_EFM32_UART - tristate "EFM32 UART/USART port." - depends on ARCH_EFM32 + tristate "EFM32 UART/USART port" + depends on ARM && (ARCH_EFM32 || COMPILE_TEST) select SERIAL_CORE help This driver support the USART and UART ports on @@ -1497,6 +1497,22 @@ config SERIAL_FSL_LPUART_CONSOLE If you have enabled the lpuart serial port on the Freescale SoCs, you can make it the console by answering Y to this option. +config SERIAL_ST_ASC + tristate "ST ASC serial port support" + select SERIAL_CORE + help + This driver is for the on-chip Asychronous Serial Controller on + STMicroelectronics STi SoCs. + ASC is embedded in ST COMMS IP block. It supports Rx & Tx functionality. + It support all industry standard baud rates. + + If unsure, say N. + +config SERIAL_ST_ASC_CONSOLE + bool "Support for console on ST ASC" + depends on SERIAL_ST_ASC=y + select SERIAL_CORE_CONSOLE + endmenu endif # TTY diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index cf650f0cd6e4..47b679c547e9 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -65,6 +65,7 @@ obj-$(CONFIG_SERIAL_KGDB_NMI) += kgdb_nmi.o obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o +obj-$(CONFIG_SERIAL_ST_ASC) += st-asc.o obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o obj-$(CONFIG_SERIAL_QE) += ucc_uart.o obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c index c6bdb943726b..2299a34225d4 100644 --- a/drivers/tty/serial/altera_jtaguart.c +++ b/drivers/tty/serial/altera_jtaguart.c @@ -408,7 +408,8 @@ static struct uart_driver altera_jtaguart_driver = { static int altera_jtaguart_probe(struct platform_device *pdev) { - struct altera_jtaguart_platform_uart *platp = pdev->dev.platform_data; + struct altera_jtaguart_platform_uart *platp = + dev_get_platdata(&pdev->dev); struct uart_port *port; struct resource *res_irq, *res_mem; int i = pdev->id; diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 1d46966e2a65..fa638db9a98c 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -534,7 +534,7 @@ static int altera_uart_get_of_uartclk(struct platform_device *pdev, static int altera_uart_probe(struct platform_device *pdev) { - struct altera_uart_platform_uart *platp = pdev->dev.platform_data; + struct altera_uart_platform_uart *platp = dev_get_platdata(&pdev->dev); struct uart_port *port; struct resource *res_mem; struct resource *res_irq; diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index c36840519527..8b90f0b6dfdf 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -721,7 +721,7 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id) uap->port.flags = UPF_BOOT_AUTOCONF; uap->port.line = i; uap->dev = dev; - uap->data = dev->dev.platform_data; + uap->data = dev_get_platdata(&dev->dev); amba_ports[i] = uap; diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 28b35ad9c6cd..eb38fb851b4e 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -265,7 +265,7 @@ static void pl011_sgbuf_free(struct dma_chan *chan, struct pl011_sgbuf *sg, static void pl011_dma_probe_initcall(struct device *dev, struct uart_amba_port *uap) { /* DMA is the sole user of the platform data right now */ - struct amba_pl011_data *plat = uap->port.dev->platform_data; + struct amba_pl011_data *plat = dev_get_platdata(uap->port.dev); struct dma_slave_config tx_conf = { .dst_addr = uap->port.mapbase + UART01x_DR, .dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE, @@ -1497,10 +1497,10 @@ static int pl011_hwinit(struct uart_port *port) uap->im = readw(uap->port.membase + UART011_IMSC); writew(UART011_RTIM | UART011_RXIM, uap->port.membase + UART011_IMSC); - if (uap->port.dev->platform_data) { + if (dev_get_platdata(uap->port.dev)) { struct amba_pl011_data *plat; - plat = uap->port.dev->platform_data; + plat = dev_get_platdata(uap->port.dev); if (plat->init) plat->init(); } @@ -1645,10 +1645,10 @@ static void pl011_shutdown(struct uart_port *port) /* Optionally let pins go into sleep states */ pinctrl_pm_select_sleep_state(port->dev); - if (uap->port.dev->platform_data) { + if (dev_get_platdata(uap->port.dev)) { struct amba_pl011_data *plat; - plat = uap->port.dev->platform_data; + plat = dev_get_platdata(uap->port.dev); if (plat->exit) plat->exit(); } @@ -2002,10 +2002,10 @@ static int __init pl011_console_setup(struct console *co, char *options) if (ret) return ret; - if (uap->port.dev->platform_data) { + if (dev_get_platdata(uap->port.dev)) { struct amba_pl011_data *plat; - plat = uap->port.dev->platform_data; + plat = dev_get_platdata(uap->port.dev); if (plat->init) plat->init(); } diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 27f20c57abed..7aa9062153e8 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -629,7 +629,7 @@ static int ar933x_uart_probe(struct platform_device *pdev) int id; int ret; - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); if (!pdata) return -EINVAL; @@ -703,7 +703,6 @@ static int ar933x_uart_remove(struct platform_device *pdev) struct ar933x_uart_port *up; up = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); if (up) { uart_remove_one_port(&ar933x_uart_driver, &up->port); diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c index 22f280aa4f2c..37abf6ca2f34 100644 --- a/drivers/tty/serial/arc_uart.c +++ b/drivers/tty/serial/arc_uart.c @@ -209,9 +209,9 @@ static void arc_serial_start_tx(struct uart_port *port) arc_serial_tx_chars(uart); } -static void arc_serial_rx_chars(struct arc_uart_port *uart) +static void arc_serial_rx_chars(struct arc_uart_port *uart, unsigned int status) { - unsigned int status, ch, flg = 0; + unsigned int ch, flg = 0; /* * UART has 4 deep RX-FIFO. Driver's recongnition of this fact @@ -222,11 +222,11 @@ static void arc_serial_rx_chars(struct arc_uart_port *uart) * before RX-EMPTY=0, implies some sort of buffering going on in the * controller, which is indeed the Rx-FIFO. */ - while (!((status = UART_GET_STATUS(uart)) & RXEMPTY)) { - - ch = UART_GET_DATA(uart); - uart->port.icount.rx++; - + do { + /* + * This could be an Rx Intr for err (no data), + * so check err and clear that Intr first + */ if (unlikely(status & (RXOERR | RXFERR))) { if (status & RXOERR) { uart->port.icount.overrun++; @@ -242,14 +242,17 @@ static void arc_serial_rx_chars(struct arc_uart_port *uart) } else flg = TTY_NORMAL; - if (unlikely(uart_handle_sysrq_char(&uart->port, ch))) - goto done; + if (status & RXEMPTY) + continue; - uart_insert_char(&uart->port, status, RXOERR, ch, flg); + ch = UART_GET_DATA(uart); + uart->port.icount.rx++; + + if (!(uart_handle_sysrq_char(&uart->port, ch))) + uart_insert_char(&uart->port, status, RXOERR, ch, flg); -done: tty_flip_buffer_push(&uart->port.state->port); - } + } while (!((status = UART_GET_STATUS(uart)) & RXEMPTY)); } /* @@ -292,11 +295,11 @@ static irqreturn_t arc_serial_isr(int irq, void *dev_id) * notifications from the UART Controller. * To demultiplex between the two, we check the relevant bits */ - if ((status & RXIENB) && !(status & RXEMPTY)) { + if (status & RXIENB) { /* already in ISR, no need of xx_irqsave */ spin_lock(&uart->port.lock); - arc_serial_rx_chars(uart); + arc_serial_rx_chars(uart, status); spin_unlock(&uart->port.lock); } @@ -528,7 +531,7 @@ arc_uart_init_one(struct platform_device *pdev, int dev_id) unsigned long *plat_data; struct arc_uart_port *uart = &arc_uart_ports[dev_id]; - plat_data = ((unsigned long *)(pdev->dev.platform_data)); + plat_data = (unsigned long *)dev_get_platdata(&pdev->dev); if (!plat_data) return -ENODEV; diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 691265faebbe..d067285a2d20 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -39,8 +39,8 @@ #include <linux/atmel_pdc.h> #include <linux/atmel_serial.h> #include <linux/uaccess.h> -#include <linux/pinctrl/consumer.h> #include <linux/platform_data/atmel.h> +#include <linux/timer.h> #include <asm/io.h> #include <asm/ioctls.h> @@ -98,6 +98,7 @@ static void atmel_stop_rx(struct uart_port *port); #define UART_PUT_BRGR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_BRGR) #define UART_PUT_RTOR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_RTOR) #define UART_PUT_TTGR(port, v) __raw_writel(v, (port)->membase + ATMEL_US_TTGR) +#define UART_GET_IP_NAME(port) __raw_readl((port)->membase + ATMEL_US_NAME) /* PDC registers */ #define UART_PUT_PTCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_PTCR) @@ -140,13 +141,25 @@ struct atmel_uart_port { u32 backup_imr; /* IMR saved during suspend */ int break_active; /* break being received */ - short use_dma_rx; /* enable PDC receiver */ + bool use_dma_rx; /* enable DMA receiver */ + bool use_pdc_rx; /* enable PDC receiver */ short pdc_rx_idx; /* current PDC RX buffer */ struct atmel_dma_buffer pdc_rx[2]; /* PDC receier */ - short use_dma_tx; /* enable PDC transmitter */ + bool use_dma_tx; /* enable DMA transmitter */ + bool use_pdc_tx; /* enable PDC transmitter */ struct atmel_dma_buffer pdc_tx; /* PDC transmitter */ + spinlock_t lock_tx; /* port lock */ + spinlock_t lock_rx; /* port lock */ + struct dma_chan *chan_tx; + struct dma_chan *chan_rx; + struct dma_async_tx_descriptor *desc_tx; + struct dma_async_tx_descriptor *desc_rx; + dma_cookie_t cookie_tx; + dma_cookie_t cookie_rx; + struct scatterlist sg_tx; + struct scatterlist sg_rx; struct tasklet_struct tasklet; unsigned int irq_status; unsigned int irq_status_prev; @@ -155,6 +168,14 @@ struct atmel_uart_port { struct serial_rs485 rs485; /* rs485 settings */ unsigned int tx_done_mask; + bool is_usart; /* usart or uart */ + struct timer_list uart_timer; /* uart timer */ + int (*prepare_rx)(struct uart_port *port); + int (*prepare_tx)(struct uart_port *port); + void (*schedule_rx)(struct uart_port *port); + void (*schedule_tx)(struct uart_port *port); + void (*release_rx)(struct uart_port *port); + void (*release_tx)(struct uart_port *port); }; static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART]; @@ -181,31 +202,45 @@ to_atmel_uart_port(struct uart_port *uart) } #ifdef CONFIG_SERIAL_ATMEL_PDC -static bool atmel_use_dma_rx(struct uart_port *port) +static bool atmel_use_pdc_rx(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - return atmel_port->use_dma_rx; + return atmel_port->use_pdc_rx; } -static bool atmel_use_dma_tx(struct uart_port *port) +static bool atmel_use_pdc_tx(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - return atmel_port->use_dma_tx; + return atmel_port->use_pdc_tx; } #else -static bool atmel_use_dma_rx(struct uart_port *port) +static bool atmel_use_pdc_rx(struct uart_port *port) { return false; } -static bool atmel_use_dma_tx(struct uart_port *port) +static bool atmel_use_pdc_tx(struct uart_port *port) { return false; } #endif +static bool atmel_use_dma_tx(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + return atmel_port->use_dma_tx; +} + +static bool atmel_use_dma_rx(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + return atmel_port->use_dma_rx; +} + /* Enable or disable the rs485 support */ void atmel_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf) { @@ -233,7 +268,7 @@ void atmel_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf) mode |= ATMEL_US_USMODE_RS485; } else { dev_dbg(port->dev, "Setting UART to RS232\n"); - if (atmel_use_dma_tx(port)) + if (atmel_use_pdc_tx(port)) atmel_port->tx_done_mask = ATMEL_US_ENDTX | ATMEL_US_TXBUFE; else @@ -345,7 +380,7 @@ static void atmel_stop_tx(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - if (atmel_use_dma_tx(port)) { + if (atmel_use_pdc_tx(port)) { /* disable PDC transmit */ UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS); } @@ -364,7 +399,7 @@ static void atmel_start_tx(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - if (atmel_use_dma_tx(port)) { + if (atmel_use_pdc_tx(port)) { if (UART_GET_PTSR(port) & ATMEL_PDC_TXTEN) /* The transmitter is already running. Yes, we really need this.*/ @@ -390,7 +425,7 @@ static void atmel_start_rx(struct uart_port *port) UART_PUT_CR(port, ATMEL_US_RXEN); - if (atmel_use_dma_rx(port)) { + if (atmel_use_pdc_rx(port)) { /* enable PDC controller */ UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT | port->read_status_mask); @@ -407,7 +442,7 @@ static void atmel_stop_rx(struct uart_port *port) { UART_PUT_CR(port, ATMEL_US_RXDIS); - if (atmel_use_dma_rx(port)) { + if (atmel_use_pdc_rx(port)) { /* disable PDC receive */ UART_PUT_PTCR(port, ATMEL_PDC_RXTDIS); UART_PUT_IDR(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT | @@ -564,6 +599,372 @@ static void atmel_tx_chars(struct uart_port *port) UART_PUT_IER(port, atmel_port->tx_done_mask); } +static void atmel_complete_tx_dma(void *arg) +{ + struct atmel_uart_port *atmel_port = arg; + struct uart_port *port = &atmel_port->uart; + struct circ_buf *xmit = &port->state->xmit; + struct dma_chan *chan = atmel_port->chan_tx; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + if (chan) + dmaengine_terminate_all(chan); + xmit->tail += sg_dma_len(&atmel_port->sg_tx); + xmit->tail &= UART_XMIT_SIZE - 1; + + port->icount.tx += sg_dma_len(&atmel_port->sg_tx); + + spin_lock_irq(&atmel_port->lock_tx); + async_tx_ack(atmel_port->desc_tx); + atmel_port->cookie_tx = -EINVAL; + atmel_port->desc_tx = NULL; + spin_unlock_irq(&atmel_port->lock_tx); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + /* Do we really need this? */ + if (!uart_circ_empty(xmit)) + tasklet_schedule(&atmel_port->tasklet); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static void atmel_release_tx_dma(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct dma_chan *chan = atmel_port->chan_tx; + + if (chan) { + dmaengine_terminate_all(chan); + dma_release_channel(chan); + dma_unmap_sg(port->dev, &atmel_port->sg_tx, 1, + DMA_MEM_TO_DEV); + } + + atmel_port->desc_tx = NULL; + atmel_port->chan_tx = NULL; + atmel_port->cookie_tx = -EINVAL; +} + +/* + * Called from tasklet with TXRDY interrupt is disabled. + */ +static void atmel_tx_dma(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct circ_buf *xmit = &port->state->xmit; + struct dma_chan *chan = atmel_port->chan_tx; + struct dma_async_tx_descriptor *desc; + struct scatterlist *sg = &atmel_port->sg_tx; + + /* Make sure we have an idle channel */ + if (atmel_port->desc_tx != NULL) + return; + + if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) { + /* + * DMA is idle now. + * Port xmit buffer is already mapped, + * and it is one page... Just adjust + * offsets and lengths. Since it is a circular buffer, + * we have to transmit till the end, and then the rest. + * Take the port lock to get a + * consistent xmit buffer state. + */ + sg->offset = xmit->tail & (UART_XMIT_SIZE - 1); + sg_dma_address(sg) = (sg_dma_address(sg) & + ~(UART_XMIT_SIZE - 1)) + + sg->offset; + sg_dma_len(sg) = CIRC_CNT_TO_END(xmit->head, + xmit->tail, + UART_XMIT_SIZE); + BUG_ON(!sg_dma_len(sg)); + + desc = dmaengine_prep_slave_sg(chan, + sg, + 1, + DMA_MEM_TO_DEV, + DMA_PREP_INTERRUPT | + DMA_CTRL_ACK); + if (!desc) { + dev_err(port->dev, "Failed to send via dma!\n"); + return; + } + + dma_sync_sg_for_device(port->dev, sg, 1, DMA_MEM_TO_DEV); + + atmel_port->desc_tx = desc; + desc->callback = atmel_complete_tx_dma; + desc->callback_param = atmel_port; + atmel_port->cookie_tx = dmaengine_submit(desc); + + } else { + if (atmel_port->rs485.flags & SER_RS485_ENABLED) { + /* DMA done, stop TX, start RX for RS485 */ + atmel_start_rx(port); + } + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); +} + +static int atmel_prepare_tx_dma(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + dma_cap_mask_t mask; + struct dma_slave_config config; + int ret, nent; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + atmel_port->chan_tx = dma_request_slave_channel(port->dev, "tx"); + if (atmel_port->chan_tx == NULL) + goto chan_err; + dev_info(port->dev, "using %s for tx DMA transfers\n", + dma_chan_name(atmel_port->chan_tx)); + + spin_lock_init(&atmel_port->lock_tx); + sg_init_table(&atmel_port->sg_tx, 1); + /* UART circular tx buffer is an aligned page. */ + BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK); + sg_set_page(&atmel_port->sg_tx, + virt_to_page(port->state->xmit.buf), + UART_XMIT_SIZE, + (int)port->state->xmit.buf & ~PAGE_MASK); + nent = dma_map_sg(port->dev, + &atmel_port->sg_tx, + 1, + DMA_MEM_TO_DEV); + + if (!nent) { + dev_dbg(port->dev, "need to release resource of dma\n"); + goto chan_err; + } else { + dev_dbg(port->dev, "%s: mapped %d@%p to %x\n", __func__, + sg_dma_len(&atmel_port->sg_tx), + port->state->xmit.buf, + sg_dma_address(&atmel_port->sg_tx)); + } + + /* Configure the slave DMA */ + memset(&config, 0, sizeof(config)); + config.direction = DMA_MEM_TO_DEV; + config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + config.dst_addr = port->mapbase + ATMEL_US_THR; + + ret = dmaengine_device_control(atmel_port->chan_tx, + DMA_SLAVE_CONFIG, + (unsigned long)&config); + if (ret) { + dev_err(port->dev, "DMA tx slave configuration failed\n"); + goto chan_err; + } + + return 0; + +chan_err: + dev_err(port->dev, "TX channel not available, switch to pio\n"); + atmel_port->use_dma_tx = 0; + if (atmel_port->chan_tx) + atmel_release_tx_dma(port); + return -EINVAL; +} + +static void atmel_flip_buffer_rx_dma(struct uart_port *port, + char *buf, size_t count) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct tty_port *tport = &port->state->port; + + dma_sync_sg_for_cpu(port->dev, + &atmel_port->sg_rx, + 1, + DMA_DEV_TO_MEM); + + tty_insert_flip_string(tport, buf, count); + + dma_sync_sg_for_device(port->dev, + &atmel_port->sg_rx, + 1, + DMA_DEV_TO_MEM); + /* + * Drop the lock here since it might end up calling + * uart_start(), which takes the lock. + */ + spin_unlock(&port->lock); + tty_flip_buffer_push(tport); + spin_lock(&port->lock); +} + +static void atmel_complete_rx_dma(void *arg) +{ + struct uart_port *port = arg; + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + tasklet_schedule(&atmel_port->tasklet); +} + +static void atmel_release_rx_dma(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct dma_chan *chan = atmel_port->chan_rx; + + if (chan) { + dmaengine_terminate_all(chan); + dma_release_channel(chan); + dma_unmap_sg(port->dev, &atmel_port->sg_rx, 1, + DMA_DEV_TO_MEM); + } + + atmel_port->desc_rx = NULL; + atmel_port->chan_rx = NULL; + atmel_port->cookie_rx = -EINVAL; + + if (!atmel_port->is_usart) + del_timer_sync(&atmel_port->uart_timer); +} + +static void atmel_rx_from_dma(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct circ_buf *ring = &atmel_port->rx_ring; + struct dma_chan *chan = atmel_port->chan_rx; + struct dma_tx_state state; + enum dma_status dmastat; + size_t pending, count; + + + /* Reset the UART timeout early so that we don't miss one */ + UART_PUT_CR(port, ATMEL_US_STTTO); + dmastat = dmaengine_tx_status(chan, + atmel_port->cookie_rx, + &state); + /* Restart a new tasklet if DMA status is error */ + if (dmastat == DMA_ERROR) { + dev_dbg(port->dev, "Get residue error, restart tasklet\n"); + UART_PUT_IER(port, ATMEL_US_TIMEOUT); + tasklet_schedule(&atmel_port->tasklet); + return; + } + /* current transfer size should no larger than dma buffer */ + pending = sg_dma_len(&atmel_port->sg_rx) - state.residue; + BUG_ON(pending > sg_dma_len(&atmel_port->sg_rx)); + + /* + * This will take the chars we have so far, + * ring->head will record the transfer size, only new bytes come + * will insert into the framework. + */ + if (pending > ring->head) { + count = pending - ring->head; + + atmel_flip_buffer_rx_dma(port, ring->buf + ring->head, count); + + ring->head += count; + if (ring->head == sg_dma_len(&atmel_port->sg_rx)) + ring->head = 0; + + port->icount.rx += count; + } + + UART_PUT_IER(port, ATMEL_US_TIMEOUT); +} + +static int atmel_prepare_rx_dma(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct dma_async_tx_descriptor *desc; + dma_cap_mask_t mask; + struct dma_slave_config config; + struct circ_buf *ring; + int ret, nent; + + ring = &atmel_port->rx_ring; + + dma_cap_zero(mask); + dma_cap_set(DMA_CYCLIC, mask); + + atmel_port->chan_rx = dma_request_slave_channel(port->dev, "rx"); + if (atmel_port->chan_rx == NULL) + goto chan_err; + dev_info(port->dev, "using %s for rx DMA transfers\n", + dma_chan_name(atmel_port->chan_rx)); + + spin_lock_init(&atmel_port->lock_rx); + sg_init_table(&atmel_port->sg_rx, 1); + /* UART circular rx buffer is an aligned page. */ + BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK); + sg_set_page(&atmel_port->sg_rx, + virt_to_page(ring->buf), + ATMEL_SERIAL_RINGSIZE, + (int)ring->buf & ~PAGE_MASK); + nent = dma_map_sg(port->dev, + &atmel_port->sg_rx, + 1, + DMA_DEV_TO_MEM); + + if (!nent) { + dev_dbg(port->dev, "need to release resource of dma\n"); + goto chan_err; + } else { + dev_dbg(port->dev, "%s: mapped %d@%p to %x\n", __func__, + sg_dma_len(&atmel_port->sg_rx), + ring->buf, + sg_dma_address(&atmel_port->sg_rx)); + } + + /* Configure the slave DMA */ + memset(&config, 0, sizeof(config)); + config.direction = DMA_DEV_TO_MEM; + config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + config.src_addr = port->mapbase + ATMEL_US_RHR; + + ret = dmaengine_device_control(atmel_port->chan_rx, + DMA_SLAVE_CONFIG, + (unsigned long)&config); + if (ret) { + dev_err(port->dev, "DMA rx slave configuration failed\n"); + goto chan_err; + } + /* + * Prepare a cyclic dma transfer, assign 2 descriptors, + * each one is half ring buffer size + */ + desc = dmaengine_prep_dma_cyclic(atmel_port->chan_rx, + sg_dma_address(&atmel_port->sg_rx), + sg_dma_len(&atmel_port->sg_rx), + sg_dma_len(&atmel_port->sg_rx)/2, + DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT); + desc->callback = atmel_complete_rx_dma; + desc->callback_param = port; + atmel_port->desc_rx = desc; + atmel_port->cookie_rx = dmaengine_submit(desc); + + return 0; + +chan_err: + dev_err(port->dev, "RX channel not available, switch to pio\n"); + atmel_port->use_dma_rx = 0; + if (atmel_port->chan_rx) + atmel_release_rx_dma(port); + return -EINVAL; +} + +static void atmel_uart_timer_callback(unsigned long data) +{ + struct uart_port *port = (void *)data; + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + tasklet_schedule(&atmel_port->tasklet); + mod_timer(&atmel_port->uart_timer, jiffies + uart_poll_timeout(port)); +} + /* * receive interrupt handler. */ @@ -572,7 +973,7 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - if (atmel_use_dma_rx(port)) { + if (atmel_use_pdc_rx(port)) { /* * PDC receive. Just schedule the tasklet and let it * figure out the details. @@ -591,6 +992,13 @@ atmel_handle_receive(struct uart_port *port, unsigned int pending) atmel_pdc_rxerr(port, pending); } + if (atmel_use_dma_rx(port)) { + if (pending & ATMEL_US_TIMEOUT) { + UART_PUT_IDR(port, ATMEL_US_TIMEOUT); + tasklet_schedule(&atmel_port->tasklet); + } + } + /* Interrupt receive */ if (pending & ATMEL_US_RXRDY) atmel_rx_chars(port); @@ -658,10 +1066,21 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id) return pass_counter ? IRQ_HANDLED : IRQ_NONE; } +static void atmel_release_tx_pdc(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; + + dma_unmap_single(port->dev, + pdc->dma_addr, + pdc->dma_size, + DMA_TO_DEVICE); +} + /* * Called from tasklet with ENDTX and TXBUFE interrupts disabled. */ -static void atmel_tx_dma(struct uart_port *port) +static void atmel_tx_pdc(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); struct circ_buf *xmit = &port->state->xmit; @@ -710,6 +1129,23 @@ static void atmel_tx_dma(struct uart_port *port) uart_write_wakeup(port); } +static int atmel_prepare_tx_pdc(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; + struct circ_buf *xmit = &port->state->xmit; + + pdc->buf = xmit->buf; + pdc->dma_addr = dma_map_single(port->dev, + pdc->buf, + UART_XMIT_SIZE, + DMA_TO_DEVICE); + pdc->dma_size = UART_XMIT_SIZE; + pdc->ofs = 0; + + return 0; +} + static void atmel_rx_from_ring(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); @@ -778,7 +1214,26 @@ static void atmel_rx_from_ring(struct uart_port *port) spin_lock(&port->lock); } -static void atmel_rx_from_dma(struct uart_port *port) +static void atmel_release_rx_pdc(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + int i; + + for (i = 0; i < 2; i++) { + struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i]; + + dma_unmap_single(port->dev, + pdc->dma_addr, + pdc->dma_size, + DMA_FROM_DEVICE); + kfree(pdc->buf); + } + + if (!atmel_port->is_usart) + del_timer_sync(&atmel_port->uart_timer); +} + +static void atmel_rx_from_pdc(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); struct tty_port *tport = &port->state->port; @@ -855,6 +1310,45 @@ static void atmel_rx_from_dma(struct uart_port *port) UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT); } +static int atmel_prepare_rx_pdc(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + int i; + + for (i = 0; i < 2; i++) { + struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i]; + + pdc->buf = kmalloc(PDC_BUFFER_SIZE, GFP_KERNEL); + if (pdc->buf == NULL) { + if (i != 0) { + dma_unmap_single(port->dev, + atmel_port->pdc_rx[0].dma_addr, + PDC_BUFFER_SIZE, + DMA_FROM_DEVICE); + kfree(atmel_port->pdc_rx[0].buf); + } + atmel_port->use_pdc_rx = 0; + return -ENOMEM; + } + pdc->dma_addr = dma_map_single(port->dev, + pdc->buf, + PDC_BUFFER_SIZE, + DMA_FROM_DEVICE); + pdc->dma_size = PDC_BUFFER_SIZE; + pdc->ofs = 0; + } + + atmel_port->pdc_rx_idx = 0; + + UART_PUT_RPR(port, atmel_port->pdc_rx[0].dma_addr); + UART_PUT_RCR(port, PDC_BUFFER_SIZE); + + UART_PUT_RNPR(port, atmel_port->pdc_rx[1].dma_addr); + UART_PUT_RNCR(port, PDC_BUFFER_SIZE); + + return 0; +} + /* * tasklet handling tty stuff outside the interrupt handler. */ @@ -868,10 +1362,7 @@ static void atmel_tasklet_func(unsigned long data) /* The interrupt handler does not take the lock */ spin_lock(&port->lock); - if (atmel_use_dma_tx(port)) - atmel_tx_dma(port); - else - atmel_tx_chars(port); + atmel_port->schedule_tx(port); status = atmel_port->irq_status; status_change = status ^ atmel_port->irq_status_prev; @@ -893,19 +1384,152 @@ static void atmel_tasklet_func(unsigned long data) atmel_port->irq_status_prev = status; } - if (atmel_use_dma_rx(port)) - atmel_rx_from_dma(port); - else - atmel_rx_from_ring(port); + atmel_port->schedule_rx(port); spin_unlock(&port->lock); } +static int atmel_init_property(struct atmel_uart_port *atmel_port, + struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev); + + if (np) { + /* DMA/PDC usage specification */ + if (of_get_property(np, "atmel,use-dma-rx", NULL)) { + if (of_get_property(np, "dmas", NULL)) { + atmel_port->use_dma_rx = true; + atmel_port->use_pdc_rx = false; + } else { + atmel_port->use_dma_rx = false; + atmel_port->use_pdc_rx = true; + } + } else { + atmel_port->use_dma_rx = false; + atmel_port->use_pdc_rx = false; + } + + if (of_get_property(np, "atmel,use-dma-tx", NULL)) { + if (of_get_property(np, "dmas", NULL)) { + atmel_port->use_dma_tx = true; + atmel_port->use_pdc_tx = false; + } else { + atmel_port->use_dma_tx = false; + atmel_port->use_pdc_tx = true; + } + } else { + atmel_port->use_dma_tx = false; + atmel_port->use_pdc_tx = false; + } + + } else { + atmel_port->use_pdc_rx = pdata->use_dma_rx; + atmel_port->use_pdc_tx = pdata->use_dma_tx; + atmel_port->use_dma_rx = false; + atmel_port->use_dma_tx = false; + } + + return 0; +} + +static void atmel_init_rs485(struct atmel_uart_port *atmel_port, + struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev); + + if (np) { + u32 rs485_delay[2]; + /* rs485 properties */ + if (of_property_read_u32_array(np, "rs485-rts-delay", + rs485_delay, 2) == 0) { + struct serial_rs485 *rs485conf = &atmel_port->rs485; + + rs485conf->delay_rts_before_send = rs485_delay[0]; + rs485conf->delay_rts_after_send = rs485_delay[1]; + rs485conf->flags = 0; + + if (of_get_property(np, "rs485-rx-during-tx", NULL)) + rs485conf->flags |= SER_RS485_RX_DURING_TX; + + if (of_get_property(np, "linux,rs485-enabled-at-boot-time", + NULL)) + rs485conf->flags |= SER_RS485_ENABLED; + } + } else { + atmel_port->rs485 = pdata->rs485; + } + +} + +static void atmel_set_ops(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + + if (atmel_use_dma_rx(port)) { + atmel_port->prepare_rx = &atmel_prepare_rx_dma; + atmel_port->schedule_rx = &atmel_rx_from_dma; + atmel_port->release_rx = &atmel_release_rx_dma; + } else if (atmel_use_pdc_rx(port)) { + atmel_port->prepare_rx = &atmel_prepare_rx_pdc; + atmel_port->schedule_rx = &atmel_rx_from_pdc; + atmel_port->release_rx = &atmel_release_rx_pdc; + } else { + atmel_port->prepare_rx = NULL; + atmel_port->schedule_rx = &atmel_rx_from_ring; + atmel_port->release_rx = NULL; + } + + if (atmel_use_dma_tx(port)) { + atmel_port->prepare_tx = &atmel_prepare_tx_dma; + atmel_port->schedule_tx = &atmel_tx_dma; + atmel_port->release_tx = &atmel_release_tx_dma; + } else if (atmel_use_pdc_tx(port)) { + atmel_port->prepare_tx = &atmel_prepare_tx_pdc; + atmel_port->schedule_tx = &atmel_tx_pdc; + atmel_port->release_tx = &atmel_release_tx_pdc; + } else { + atmel_port->prepare_tx = NULL; + atmel_port->schedule_tx = &atmel_tx_chars; + atmel_port->release_tx = NULL; + } +} + +/* + * Get ip name usart or uart + */ +static int atmel_get_ip_name(struct uart_port *port) +{ + struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); + int name = UART_GET_IP_NAME(port); + int usart, uart; + /* usart and uart ascii */ + usart = 0x55534152; + uart = 0x44424755; + + atmel_port->is_usart = false; + + if (name == usart) { + dev_dbg(port->dev, "This is usart\n"); + atmel_port->is_usart = true; + } else if (name == uart) { + dev_dbg(port->dev, "This is uart\n"); + atmel_port->is_usart = false; + } else { + dev_err(port->dev, "Not supported ip name, set to uart\n"); + return -EINVAL; + } + + return 0; +} + /* * Perform initialization and enable port for reception */ static int atmel_startup(struct uart_port *port) { + struct platform_device *pdev = to_platform_device(port->dev); struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); struct tty_struct *tty = port->state->port.tty; int retval; @@ -930,53 +1554,19 @@ static int atmel_startup(struct uart_port *port) /* * Initialize DMA (if necessary) */ - if (atmel_use_dma_rx(port)) { - int i; - - for (i = 0; i < 2; i++) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i]; - - pdc->buf = kmalloc(PDC_BUFFER_SIZE, GFP_KERNEL); - if (pdc->buf == NULL) { - if (i != 0) { - dma_unmap_single(port->dev, - atmel_port->pdc_rx[0].dma_addr, - PDC_BUFFER_SIZE, - DMA_FROM_DEVICE); - kfree(atmel_port->pdc_rx[0].buf); - } - free_irq(port->irq, port); - return -ENOMEM; - } - pdc->dma_addr = dma_map_single(port->dev, - pdc->buf, - PDC_BUFFER_SIZE, - DMA_FROM_DEVICE); - pdc->dma_size = PDC_BUFFER_SIZE; - pdc->ofs = 0; - } + atmel_init_property(atmel_port, pdev); - atmel_port->pdc_rx_idx = 0; - - UART_PUT_RPR(port, atmel_port->pdc_rx[0].dma_addr); - UART_PUT_RCR(port, PDC_BUFFER_SIZE); - - UART_PUT_RNPR(port, atmel_port->pdc_rx[1].dma_addr); - UART_PUT_RNCR(port, PDC_BUFFER_SIZE); + if (atmel_port->prepare_rx) { + retval = atmel_port->prepare_rx(port); + if (retval < 0) + atmel_set_ops(port); } - if (atmel_use_dma_tx(port)) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; - struct circ_buf *xmit = &port->state->xmit; - pdc->buf = xmit->buf; - pdc->dma_addr = dma_map_single(port->dev, - pdc->buf, - UART_XMIT_SIZE, - DMA_TO_DEVICE); - pdc->dma_size = UART_XMIT_SIZE; - pdc->ofs = 0; + if (atmel_port->prepare_tx) { + retval = atmel_port->prepare_tx(port); + if (retval < 0) + atmel_set_ops(port); } - /* * If there is a specific "open" function (to register * control line interrupts) @@ -1000,14 +1590,38 @@ static int atmel_startup(struct uart_port *port) /* enable xmit & rcvr */ UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); - if (atmel_use_dma_rx(port)) { + if (atmel_use_pdc_rx(port)) { /* set UART timeout */ - UART_PUT_RTOR(port, PDC_RX_TIMEOUT); - UART_PUT_CR(port, ATMEL_US_STTTO); - - UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT); + if (!atmel_port->is_usart) { + setup_timer(&atmel_port->uart_timer, + atmel_uart_timer_callback, + (unsigned long)port); + mod_timer(&atmel_port->uart_timer, + jiffies + uart_poll_timeout(port)); + /* set USART timeout */ + } else { + UART_PUT_RTOR(port, PDC_RX_TIMEOUT); + UART_PUT_CR(port, ATMEL_US_STTTO); + + UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT); + } /* enable PDC controller */ UART_PUT_PTCR(port, ATMEL_PDC_RXTEN); + } else if (atmel_use_dma_rx(port)) { + /* set UART timeout */ + if (!atmel_port->is_usart) { + setup_timer(&atmel_port->uart_timer, + atmel_uart_timer_callback, + (unsigned long)port); + mod_timer(&atmel_port->uart_timer, + jiffies + uart_poll_timeout(port)); + /* set USART timeout */ + } else { + UART_PUT_RTOR(port, PDC_RX_TIMEOUT); + UART_PUT_CR(port, ATMEL_US_STTTO); + + UART_PUT_IER(port, ATMEL_US_TIMEOUT); + } } else { /* enable receive only */ UART_PUT_IER(port, ATMEL_US_RXRDY); @@ -1031,27 +1645,10 @@ static void atmel_shutdown(struct uart_port *port) /* * Shut-down the DMA. */ - if (atmel_use_dma_rx(port)) { - int i; - - for (i = 0; i < 2; i++) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i]; - - dma_unmap_single(port->dev, - pdc->dma_addr, - pdc->dma_size, - DMA_FROM_DEVICE); - kfree(pdc->buf); - } - } - if (atmel_use_dma_tx(port)) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; - - dma_unmap_single(port->dev, - pdc->dma_addr, - pdc->dma_size, - DMA_TO_DEVICE); - } + if (atmel_port->release_rx) + atmel_port->release_rx(port); + if (atmel_port->release_tx) + atmel_port->release_tx(port); /* * Disable all interrupts, port and break condition. @@ -1080,7 +1677,7 @@ static void atmel_flush_buffer(struct uart_port *port) { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - if (atmel_use_dma_tx(port)) { + if (atmel_use_pdc_tx(port)) { UART_PUT_TCR(port, 0); atmel_port->pdc_tx.ofs = 0; } @@ -1193,7 +1790,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_iflag & (BRKINT | PARMRK)) port->read_status_mask |= ATMEL_US_RXBRK; - if (atmel_use_dma_rx(port)) + if (atmel_use_pdc_rx(port)) /* need to enable error interrupts */ UART_PUT_IER(port, port->read_status_mask); @@ -1423,38 +2020,6 @@ static struct uart_ops atmel_pops = { #endif }; -static void atmel_of_init_port(struct atmel_uart_port *atmel_port, - struct device_node *np) -{ - u32 rs485_delay[2]; - - /* DMA/PDC usage specification */ - if (of_get_property(np, "atmel,use-dma-rx", NULL)) - atmel_port->use_dma_rx = 1; - else - atmel_port->use_dma_rx = 0; - if (of_get_property(np, "atmel,use-dma-tx", NULL)) - atmel_port->use_dma_tx = 1; - else - atmel_port->use_dma_tx = 0; - - /* rs485 properties */ - if (of_property_read_u32_array(np, "rs485-rts-delay", - rs485_delay, 2) == 0) { - struct serial_rs485 *rs485conf = &atmel_port->rs485; - - rs485conf->delay_rts_before_send = rs485_delay[0]; - rs485conf->delay_rts_after_send = rs485_delay[1]; - rs485conf->flags = 0; - - if (of_get_property(np, "rs485-rx-during-tx", NULL)) - rs485conf->flags |= SER_RS485_RX_DURING_TX; - - if (of_get_property(np, "linux,rs485-enabled-at-boot-time", NULL)) - rs485conf->flags |= SER_RS485_ENABLED; - } -} - /* * Configure the port from the platform device resource info. */ @@ -1463,15 +2028,12 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, { int ret; struct uart_port *port = &atmel_port->uart; - struct atmel_uart_data *pdata = pdev->dev.platform_data; + struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev); - if (pdev->dev.of_node) { - atmel_of_init_port(atmel_port, pdev->dev.of_node); - } else { - atmel_port->use_dma_rx = pdata->use_dma_rx; - atmel_port->use_dma_tx = pdata->use_dma_tx; - atmel_port->rs485 = pdata->rs485; - } + if (!atmel_init_property(atmel_port, pdev)) + atmel_set_ops(port); + + atmel_init_rs485(atmel_port, pdev); port->iotype = UPIO_MEM; port->flags = UPF_BOOT_AUTOCONF; @@ -1516,7 +2078,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port, /* Use TXEMPTY for interrupt when rs485 else TXRDY or ENDTX|TXBUFE */ if (atmel_port->rs485.flags & SER_RS485_ENABLED) atmel_port->tx_done_mask = ATMEL_US_TXEMPTY; - else if (atmel_use_dma_tx(port)) { + else if (atmel_use_pdc_tx(port)) { port->fifosize = PDC_BUFFER_SIZE; atmel_port->tx_done_mask = ATMEL_US_ENDTX | ATMEL_US_TXBUFE; } else { @@ -1664,7 +2226,7 @@ static int __init atmel_console_init(void) int ret; if (atmel_default_console_device) { struct atmel_uart_data *pdata = - atmel_default_console_device->dev.platform_data; + dev_get_platdata(&atmel_default_console_device->dev); int id = pdata->num; struct atmel_uart_port *port = &atmel_ports[id]; @@ -1772,10 +2334,9 @@ static int atmel_serial_probe(struct platform_device *pdev) { struct atmel_uart_port *port; struct device_node *np = pdev->dev.of_node; - struct atmel_uart_data *pdata = pdev->dev.platform_data; + struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev); void *data; int ret = -ENODEV; - struct pinctrl *pinctrl; BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1)); @@ -1809,13 +2370,7 @@ static int atmel_serial_probe(struct platform_device *pdev) if (ret) goto err; - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); - if (IS_ERR(pinctrl)) { - ret = PTR_ERR(pinctrl); - goto err; - } - - if (!atmel_use_dma_rx(&port->uart)) { + if (!atmel_use_pdc_rx(&port->uart)) { ret = -ENOMEM; data = kmalloc(sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE, GFP_KERNEL); @@ -1847,6 +2402,13 @@ static int atmel_serial_probe(struct platform_device *pdev) UART_PUT_CR(&port->uart, ATMEL_US_RTSEN); } + /* + * Get port name of usart or uart + */ + ret = atmel_get_ip_name(&port->uart); + if (ret < 0) + goto err_add_port; + return 0; err_add_port: @@ -1868,7 +2430,6 @@ static int atmel_serial_remove(struct platform_device *pdev) int ret = 0; device_init_wakeup(&pdev->dev, 0); - platform_set_drvdata(pdev, NULL); ret = uart_remove_one_port(&atmel_uart, port); diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c index 6fa2ae77fffd..d14ba5aa2ec7 100644 --- a/drivers/tty/serial/bcm63xx_uart.c +++ b/drivers/tty/serial/bcm63xx_uart.c @@ -852,7 +852,6 @@ static int bcm_uart_remove(struct platform_device *pdev) port = platform_get_drvdata(pdev); uart_remove_one_port(&bcm_uart_driver, port); - platform_set_drvdata(pdev, NULL); /* mark port as free */ ports[pdev->id].membase = 0; return 0; diff --git a/drivers/tty/serial/bfin_sport_uart.c b/drivers/tty/serial/bfin_sport_uart.c index 487c173b0f72..424ed36c26f1 100644 --- a/drivers/tty/serial/bfin_sport_uart.c +++ b/drivers/tty/serial/bfin_sport_uart.c @@ -766,7 +766,8 @@ static int sport_uart_probe(struct platform_device *pdev) } ret = peripheral_request_list( - (unsigned short *)pdev->dev.platform_data, DRV_NAME); + (unsigned short *)dev_get_platdata(&pdev->dev), + DRV_NAME); if (ret) { dev_err(&pdev->dev, "Fail to request SPORT peripherals\n"); @@ -843,7 +844,7 @@ out_error_unmap: iounmap(sport->port.membase); out_error_free_peripherals: peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); + (unsigned short *)dev_get_platdata(&pdev->dev)); out_error_free_mem: kfree(sport); bfin_sport_uart_ports[pdev->id] = NULL; @@ -863,7 +864,7 @@ static int sport_uart_remove(struct platform_device *pdev) uart_remove_one_port(&sport_uart_reg, &sport->port); iounmap(sport->port.membase); peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); + (unsigned short *)dev_get_platdata(&pdev->dev)); kfree(sport); bfin_sport_uart_ports[pdev->id] = NULL; } diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index 26a3be7ced7d..378f3c383992 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -41,10 +41,6 @@ # undef CONFIG_EARLY_PRINTK #endif -#ifdef CONFIG_SERIAL_BFIN_MODULE -# undef CONFIG_EARLY_PRINTK -#endif - /* UART name and device definitions */ #define BFIN_SERIAL_DEV_NAME "ttyBF" #define BFIN_SERIAL_MAJOR 204 @@ -1244,7 +1240,8 @@ static int bfin_serial_probe(struct platform_device *pdev) */ #endif ret = peripheral_request_list( - (unsigned short *)pdev->dev.platform_data, DRIVER_NAME); + (unsigned short *)dev_get_platdata(&pdev->dev), + DRIVER_NAME); if (ret) { dev_err(&pdev->dev, "fail to request bfin serial peripherals\n"); @@ -1362,7 +1359,7 @@ out_error_unmap: iounmap(uart->port.membase); out_error_free_peripherals: peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); + (unsigned short *)dev_get_platdata(&pdev->dev)); out_error_free_mem: kfree(uart); bfin_serial_ports[pdev->id] = NULL; @@ -1381,7 +1378,7 @@ static int bfin_serial_remove(struct platform_device *pdev) uart_remove_one_port(&bfin_serial_reg, &uart->port); iounmap(uart->port.membase); peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); + (unsigned short *)dev_get_platdata(&pdev->dev)); kfree(uart); bfin_serial_ports[pdev->id] = NULL; } @@ -1436,7 +1433,7 @@ static int bfin_earlyprintk_probe(struct platform_device *pdev) } ret = peripheral_request_list( - (unsigned short *)pdev->dev.platform_data, DRIVER_NAME); + (unsigned short *)dev_get_platdata(&pdev->dev), DRIVER_NAME); if (ret) { dev_err(&pdev->dev, "fail to request bfin serial peripherals\n"); @@ -1467,7 +1464,7 @@ static int bfin_earlyprintk_probe(struct platform_device *pdev) out_error_free_peripherals: peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); + (unsigned short *)dev_get_platdata(&pdev->dev)); return ret; } diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index bfb17968c8db..7e4e4088471c 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -438,8 +438,7 @@ static int uart_clps711x_probe(struct platform_device *pdev) s->uart_clk = devm_clk_get(&pdev->dev, "uart"); if (IS_ERR(s->uart_clk)) { dev_err(&pdev->dev, "Can't get UART clocks\n"); - ret = PTR_ERR(s->uart_clk); - goto err_out; + return PTR_ERR(s->uart_clk); } s->uart.owner = THIS_MODULE; @@ -461,7 +460,7 @@ static int uart_clps711x_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "Registering UART driver failed\n"); devm_clk_put(&pdev->dev, s->uart_clk); - goto err_out; + return ret; } for (i = 0; i < UART_CLPS711X_NR; i++) { @@ -478,11 +477,6 @@ static int uart_clps711x_probe(struct platform_device *pdev) } return 0; - -err_out: - platform_set_drvdata(pdev, NULL); - - return ret; } static int uart_clps711x_remove(struct platform_device *pdev) @@ -495,7 +489,6 @@ static int uart_clps711x_remove(struct platform_device *pdev) devm_clk_put(&pdev->dev, s->uart_clk); uart_unregister_driver(&s->uart); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c index 7d199c8e1a75..98adaa1c054f 100644 --- a/drivers/tty/serial/efm32-uart.c +++ b/drivers/tty/serial/efm32-uart.c @@ -698,6 +698,7 @@ static int efm32_uart_probe(struct platform_device *pdev) { struct efm32_uart_port *efm_port; struct resource *res; + unsigned int line; int ret; efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL); @@ -750,18 +751,21 @@ static int efm32_uart_probe(struct platform_device *pdev) if (pdata) efm_port->pdata = *pdata; - } + } else if (ret < 0) + goto err_probe_dt; + + line = efm_port->port.line; - if (efm_port->port.line >= 0 && - efm_port->port.line < ARRAY_SIZE(efm32_uart_ports)) - efm32_uart_ports[efm_port->port.line] = efm_port; + if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports)) + efm32_uart_ports[line] = efm_port; ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port); if (ret) { dev_dbg(&pdev->dev, "failed to add port: %d\n", ret); - if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports)) - efm32_uart_ports[pdev->id] = NULL; + if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports)) + efm32_uart_ports[line] = NULL; +err_probe_dt: err_get_rxirq: err_too_small: err_get_base: @@ -777,20 +781,19 @@ err_get_base: static int efm32_uart_remove(struct platform_device *pdev) { struct efm32_uart_port *efm_port = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); + unsigned int line = efm_port->port.line; uart_remove_one_port(&efm32_uart_reg, &efm_port->port); - if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports)) - efm32_uart_ports[pdev->id] = NULL; + if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports)) + efm32_uart_ports[line] = NULL; kfree(efm_port); return 0; } -static struct of_device_id efm32_uart_dt_ids[] = { +static const struct of_device_id efm32_uart_dt_ids[] = { { .compatible = "efm32,uart", }, { diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 263cfaabe9e2..8978dc9a58b7 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -342,8 +342,10 @@ static void lpuart_break_ctl(struct uart_port *port, int break_state) static void lpuart_setup_watermark(struct lpuart_port *sport) { unsigned char val, cr2; + unsigned char cr2_saved; cr2 = readb(sport->port.membase + UARTCR2); + cr2_saved = cr2; cr2 &= ~(UARTCR2_TIE | UARTCR2_TCIE | UARTCR2_TE | UARTCR2_RIE | UARTCR2_RE); writeb(cr2, sport->port.membase + UARTCR2); @@ -366,6 +368,9 @@ static void lpuart_setup_watermark(struct lpuart_port *sport) writeb(2, sport->port.membase + UARTTWFIFO); writeb(1, sport->port.membase + UARTRWFIFO); + + /* Restore cr2 */ + writeb(cr2_saved, sport->port.membase + UARTCR2); } static int lpuart_startup(struct uart_port *port) @@ -858,7 +863,7 @@ static int __init lpuart_serial_init(void) if (ret) uart_unregister_driver(&lpuart_reg); - return 0; + return ret; } static void __exit lpuart_serial_exit(void) diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c index 8b1534c424af..af286e6713eb 100644 --- a/drivers/tty/serial/ifx6x60.c +++ b/drivers/tty/serial/ifx6x60.c @@ -1008,7 +1008,7 @@ static int ifx_spi_spi_probe(struct spi_device *spi) return -ENODEV; } - pl_data = (struct ifx_modem_platform_data *)spi->dev.platform_data; + pl_data = (struct ifx_modem_platform_data *)dev_get_platdata(&spi->dev); if (!pl_data) { dev_err(&spi->dev, "missing platform data!"); return -ENODEV; diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 415cec62073f..a5f32c7c6c66 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -47,11 +47,12 @@ #include <linux/slab.h> #include <linux/of.h> #include <linux/of_device.h> -#include <linux/pinctrl/consumer.h> #include <linux/io.h> +#include <linux/dma-mapping.h> #include <asm/irq.h> #include <linux/platform_data/serial-imx.h> +#include <linux/platform_data/dma-imx.h> /* Register definitions */ #define URXD0 0x0 /* Receiver Register */ @@ -83,6 +84,7 @@ #define UCR1_ADBR (1<<14) /* Auto detect baud rate */ #define UCR1_TRDYEN (1<<13) /* Transmitter ready interrupt enable */ #define UCR1_IDEN (1<<12) /* Idle condition interrupt */ +#define UCR1_ICD_REG(x) (((x) & 3) << 10) /* idle condition detect */ #define UCR1_RRDYEN (1<<9) /* Recv ready interrupt enable */ #define UCR1_RDMAEN (1<<8) /* Recv ready DMA enable */ #define UCR1_IREN (1<<7) /* Infrared interface enable */ @@ -91,6 +93,7 @@ #define UCR1_SNDBRK (1<<4) /* Send break */ #define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */ #define IMX1_UCR1_UARTCLKEN (1<<2) /* UART clock enabled, i.mx1 only */ +#define UCR1_ATDMAEN (1<<2) /* Aging DMA Timer Enable */ #define UCR1_DOZE (1<<1) /* Doze */ #define UCR1_UARTEN (1<<0) /* UART enabled */ #define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */ @@ -126,6 +129,7 @@ #define UCR4_ENIRI (1<<8) /* Serial infrared interrupt enable */ #define UCR4_WKEN (1<<7) /* Wake interrupt enable */ #define UCR4_REF16 (1<<6) /* Ref freq 16 MHz */ +#define UCR4_IDDMAEN (1<<6) /* DMA IDLE Condition Detected */ #define UCR4_IRSC (1<<5) /* IR special case */ #define UCR4_TCEN (1<<3) /* Transmit complete interrupt enable */ #define UCR4_BKEN (1<<2) /* Break condition interrupt enable */ @@ -187,6 +191,7 @@ enum imx_uart_type { IMX1_UART, IMX21_UART, + IMX6Q_UART, }; /* device type dependent stuff */ @@ -209,6 +214,19 @@ struct imx_port { struct clk *clk_ipg; struct clk *clk_per; const struct imx_uart_data *devdata; + + /* DMA fields */ + unsigned int dma_is_inited:1; + unsigned int dma_is_enabled:1; + unsigned int dma_is_rxing:1; + unsigned int dma_is_txing:1; + struct dma_chan *dma_chan_rx, *dma_chan_tx; + struct scatterlist rx_sgl, tx_sgl[2]; + void *rx_buf; + unsigned int rx_bytes, tx_bytes; + struct work_struct tsk_dma_rx, tsk_dma_tx; + unsigned int dma_tx_nents; + wait_queue_head_t dma_wait; }; struct imx_port_ucrs { @@ -232,6 +250,10 @@ static struct imx_uart_data imx_uart_devdata[] = { .uts_reg = IMX21_UTS, .devtype = IMX21_UART, }, + [IMX6Q_UART] = { + .uts_reg = IMX21_UTS, + .devtype = IMX6Q_UART, + }, }; static struct platform_device_id imx_uart_devtype[] = { @@ -242,12 +264,16 @@ static struct platform_device_id imx_uart_devtype[] = { .name = "imx21-uart", .driver_data = (kernel_ulong_t) &imx_uart_devdata[IMX21_UART], }, { + .name = "imx6q-uart", + .driver_data = (kernel_ulong_t) &imx_uart_devdata[IMX6Q_UART], + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, imx_uart_devtype); static struct of_device_id imx_uart_dt_ids[] = { + { .compatible = "fsl,imx6q-uart", .data = &imx_uart_devdata[IMX6Q_UART], }, { .compatible = "fsl,imx1-uart", .data = &imx_uart_devdata[IMX1_UART], }, { .compatible = "fsl,imx21-uart", .data = &imx_uart_devdata[IMX21_UART], }, { /* sentinel */ } @@ -269,6 +295,10 @@ static inline int is_imx21_uart(struct imx_port *sport) return sport->devdata->devtype == IMX21_UART; } +static inline int is_imx6q_uart(struct imx_port *sport) +{ + return sport->devdata->devtype == IMX6Q_UART; +} /* * Save and restore functions for UCR1, UCR2 and UCR3 registers */ @@ -387,6 +417,13 @@ static void imx_stop_tx(struct uart_port *port) return; } + /* + * We are maybe in the SMP context, so if the DMA TX thread is running + * on other cpu, we have to wait for it to finish. + */ + if (sport->dma_is_enabled && sport->dma_is_txing) + return; + temp = readl(sport->port.membase + UCR1); writel(temp & ~UCR1_TXMPTYEN, sport->port.membase + UCR1); } @@ -399,6 +436,13 @@ static void imx_stop_rx(struct uart_port *port) struct imx_port *sport = (struct imx_port *)port; unsigned long temp; + /* + * We are maybe in the SMP context, so if the DMA TX thread is running + * on other cpu, we have to wait for it to finish. + */ + if (sport->dma_is_enabled && sport->dma_is_rxing) + return; + temp = readl(sport->port.membase + UCR2); writel(temp & ~UCR2_RXEN, sport->port.membase + UCR2); } @@ -434,6 +478,95 @@ static inline void imx_transmit_buffer(struct imx_port *sport) imx_stop_tx(&sport->port); } +static void dma_tx_callback(void *data) +{ + struct imx_port *sport = data; + struct scatterlist *sgl = &sport->tx_sgl[0]; + struct circ_buf *xmit = &sport->port.state->xmit; + unsigned long flags; + + dma_unmap_sg(sport->port.dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE); + + sport->dma_is_txing = 0; + + /* update the stat */ + spin_lock_irqsave(&sport->port.lock, flags); + xmit->tail = (xmit->tail + sport->tx_bytes) & (UART_XMIT_SIZE - 1); + sport->port.icount.tx += sport->tx_bytes; + spin_unlock_irqrestore(&sport->port.lock, flags); + + dev_dbg(sport->port.dev, "we finish the TX DMA.\n"); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&sport->port); + + if (waitqueue_active(&sport->dma_wait)) { + wake_up(&sport->dma_wait); + dev_dbg(sport->port.dev, "exit in %s.\n", __func__); + return; + } + + schedule_work(&sport->tsk_dma_tx); +} + +static void dma_tx_work(struct work_struct *w) +{ + struct imx_port *sport = container_of(w, struct imx_port, tsk_dma_tx); + struct circ_buf *xmit = &sport->port.state->xmit; + struct scatterlist *sgl = sport->tx_sgl; + struct dma_async_tx_descriptor *desc; + struct dma_chan *chan = sport->dma_chan_tx; + struct device *dev = sport->port.dev; + enum dma_status status; + unsigned long flags; + int ret; + + status = chan->device->device_tx_status(chan, (dma_cookie_t)0, NULL); + if (DMA_IN_PROGRESS == status) + return; + + spin_lock_irqsave(&sport->port.lock, flags); + sport->tx_bytes = uart_circ_chars_pending(xmit); + if (sport->tx_bytes == 0) { + spin_unlock_irqrestore(&sport->port.lock, flags); + return; + } + + if (xmit->tail > xmit->head) { + sport->dma_tx_nents = 2; + sg_init_table(sgl, 2); + sg_set_buf(sgl, xmit->buf + xmit->tail, + UART_XMIT_SIZE - xmit->tail); + sg_set_buf(sgl + 1, xmit->buf, xmit->head); + } else { + sport->dma_tx_nents = 1; + sg_init_one(sgl, xmit->buf + xmit->tail, sport->tx_bytes); + } + spin_unlock_irqrestore(&sport->port.lock, flags); + + ret = dma_map_sg(dev, sgl, sport->dma_tx_nents, DMA_TO_DEVICE); + if (ret == 0) { + dev_err(dev, "DMA mapping error for TX.\n"); + return; + } + desc = dmaengine_prep_slave_sg(chan, sgl, sport->dma_tx_nents, + DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); + if (!desc) { + dev_err(dev, "We cannot prepare for the TX slave dma!\n"); + return; + } + desc->callback = dma_tx_callback; + desc->callback_param = sport; + + dev_dbg(dev, "TX: prepare to send %lu bytes by DMA.\n", + uart_circ_chars_pending(xmit)); + /* fire it */ + sport->dma_is_txing = 1; + dmaengine_submit(desc); + dma_async_issue_pending(chan); + return; +} + /* * interrupts disabled on entry */ @@ -460,8 +593,10 @@ static void imx_start_tx(struct uart_port *port) temp |= UCR4_OREN; writel(temp, sport->port.membase + UCR4); - temp = readl(sport->port.membase + UCR1); - writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1); + if (!sport->dma_is_enabled) { + temp = readl(sport->port.membase + UCR1); + writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1); + } if (USE_IRDA(sport)) { temp = readl(sport->port.membase + UCR1); @@ -473,6 +608,15 @@ static void imx_start_tx(struct uart_port *port) writel(temp, sport->port.membase + UCR4); } + if (sport->dma_is_enabled) { + /* + * We may in the interrupt context, so arise a work_struct to + * do the real job. + */ + schedule_work(&sport->tsk_dma_tx); + return; + } + if (readl(sport->port.membase + uts_reg(sport)) & UTS_TXEMPTY) imx_transmit_buffer(sport); } @@ -588,6 +732,28 @@ out: return IRQ_HANDLED; } +/* + * If the RXFIFO is filled with some data, and then we + * arise a DMA operation to receive them. + */ +static void imx_dma_rxint(struct imx_port *sport) +{ + unsigned long temp; + + temp = readl(sport->port.membase + USR2); + if ((temp & USR2_RDR) && !sport->dma_is_rxing) { + sport->dma_is_rxing = 1; + + /* disable the `Recerver Ready Interrrupt` */ + temp = readl(sport->port.membase + UCR1); + temp &= ~(UCR1_RRDYEN); + writel(temp, sport->port.membase + UCR1); + + /* tell the DMA to receive the data. */ + schedule_work(&sport->tsk_dma_rx); + } +} + static irqreturn_t imx_int(int irq, void *dev_id) { struct imx_port *sport = dev_id; @@ -596,8 +762,12 @@ static irqreturn_t imx_int(int irq, void *dev_id) sts = readl(sport->port.membase + USR1); - if (sts & USR1_RRDY) - imx_rxint(irq, dev_id); + if (sts & USR1_RRDY) { + if (sport->dma_is_enabled) + imx_dma_rxint(sport); + else + imx_rxint(irq, dev_id); + } if (sts & USR1_TRDY && readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN) @@ -654,7 +824,8 @@ static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) temp = readl(sport->port.membase + UCR2) & ~UCR2_CTS; if (mctrl & TIOCM_RTS) - temp |= UCR2_CTS; + if (!sport->dma_is_enabled) + temp |= UCR2_CTS; writel(temp, sport->port.membase + UCR2); } @@ -693,6 +864,226 @@ static int imx_setup_ufcr(struct imx_port *sport, unsigned int mode) return 0; } +#define RX_BUF_SIZE (PAGE_SIZE) +static int start_rx_dma(struct imx_port *sport); +static void dma_rx_work(struct work_struct *w) +{ + struct imx_port *sport = container_of(w, struct imx_port, tsk_dma_rx); + struct tty_port *port = &sport->port.state->port; + + if (sport->rx_bytes) { + tty_insert_flip_string(port, sport->rx_buf, sport->rx_bytes); + tty_flip_buffer_push(port); + sport->rx_bytes = 0; + } + + if (sport->dma_is_rxing) + start_rx_dma(sport); +} + +static void imx_rx_dma_done(struct imx_port *sport) +{ + unsigned long temp; + + /* Enable this interrupt when the RXFIFO is empty. */ + temp = readl(sport->port.membase + UCR1); + temp |= UCR1_RRDYEN; + writel(temp, sport->port.membase + UCR1); + + sport->dma_is_rxing = 0; + + /* Is the shutdown waiting for us? */ + if (waitqueue_active(&sport->dma_wait)) + wake_up(&sport->dma_wait); +} + +/* + * There are three kinds of RX DMA interrupts(such as in the MX6Q): + * [1] the RX DMA buffer is full. + * [2] the Aging timer expires(wait for 8 bytes long) + * [3] the Idle Condition Detect(enabled the UCR4_IDDMAEN). + * + * The [2] is trigger when a character was been sitting in the FIFO + * meanwhile [3] can wait for 32 bytes long when the RX line is + * on IDLE state and RxFIFO is empty. + */ +static void dma_rx_callback(void *data) +{ + struct imx_port *sport = data; + struct dma_chan *chan = sport->dma_chan_rx; + struct scatterlist *sgl = &sport->rx_sgl; + struct dma_tx_state state; + enum dma_status status; + unsigned int count; + + /* unmap it first */ + dma_unmap_sg(sport->port.dev, sgl, 1, DMA_FROM_DEVICE); + + status = chan->device->device_tx_status(chan, (dma_cookie_t)0, &state); + count = RX_BUF_SIZE - state.residue; + dev_dbg(sport->port.dev, "We get %d bytes.\n", count); + + if (count) { + sport->rx_bytes = count; + schedule_work(&sport->tsk_dma_rx); + } else + imx_rx_dma_done(sport); +} + +static int start_rx_dma(struct imx_port *sport) +{ + struct scatterlist *sgl = &sport->rx_sgl; + struct dma_chan *chan = sport->dma_chan_rx; + struct device *dev = sport->port.dev; + struct dma_async_tx_descriptor *desc; + int ret; + + sg_init_one(sgl, sport->rx_buf, RX_BUF_SIZE); + ret = dma_map_sg(dev, sgl, 1, DMA_FROM_DEVICE); + if (ret == 0) { + dev_err(dev, "DMA mapping error for RX.\n"); + return -EINVAL; + } + desc = dmaengine_prep_slave_sg(chan, sgl, 1, DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT); + if (!desc) { + dev_err(dev, "We cannot prepare for the RX slave dma!\n"); + return -EINVAL; + } + desc->callback = dma_rx_callback; + desc->callback_param = sport; + + dev_dbg(dev, "RX: prepare for the DMA.\n"); + dmaengine_submit(desc); + dma_async_issue_pending(chan); + return 0; +} + +static void imx_uart_dma_exit(struct imx_port *sport) +{ + if (sport->dma_chan_rx) { + dma_release_channel(sport->dma_chan_rx); + sport->dma_chan_rx = NULL; + + kfree(sport->rx_buf); + sport->rx_buf = NULL; + } + + if (sport->dma_chan_tx) { + dma_release_channel(sport->dma_chan_tx); + sport->dma_chan_tx = NULL; + } + + sport->dma_is_inited = 0; +} + +static int imx_uart_dma_init(struct imx_port *sport) +{ + struct dma_slave_config slave_config; + struct device *dev = sport->port.dev; + int ret; + + /* Prepare for RX : */ + sport->dma_chan_rx = dma_request_slave_channel(dev, "rx"); + if (!sport->dma_chan_rx) { + dev_dbg(dev, "cannot get the DMA channel.\n"); + ret = -EINVAL; + goto err; + } + + slave_config.direction = DMA_DEV_TO_MEM; + slave_config.src_addr = sport->port.mapbase + URXD0; + slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + slave_config.src_maxburst = RXTL; + ret = dmaengine_slave_config(sport->dma_chan_rx, &slave_config); + if (ret) { + dev_err(dev, "error in RX dma configuration.\n"); + goto err; + } + + sport->rx_buf = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!sport->rx_buf) { + dev_err(dev, "cannot alloc DMA buffer.\n"); + ret = -ENOMEM; + goto err; + } + sport->rx_bytes = 0; + + /* Prepare for TX : */ + sport->dma_chan_tx = dma_request_slave_channel(dev, "tx"); + if (!sport->dma_chan_tx) { + dev_err(dev, "cannot get the TX DMA channel!\n"); + ret = -EINVAL; + goto err; + } + + slave_config.direction = DMA_MEM_TO_DEV; + slave_config.dst_addr = sport->port.mapbase + URTX0; + slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + slave_config.dst_maxburst = TXTL; + ret = dmaengine_slave_config(sport->dma_chan_tx, &slave_config); + if (ret) { + dev_err(dev, "error in TX dma configuration."); + goto err; + } + + sport->dma_is_inited = 1; + + return 0; +err: + imx_uart_dma_exit(sport); + return ret; +} + +static void imx_enable_dma(struct imx_port *sport) +{ + unsigned long temp; + struct tty_port *port = &sport->port.state->port; + + port->low_latency = 1; + INIT_WORK(&sport->tsk_dma_tx, dma_tx_work); + INIT_WORK(&sport->tsk_dma_rx, dma_rx_work); + init_waitqueue_head(&sport->dma_wait); + + /* set UCR1 */ + temp = readl(sport->port.membase + UCR1); + temp |= UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN | + /* wait for 32 idle frames for IDDMA interrupt */ + UCR1_ICD_REG(3); + writel(temp, sport->port.membase + UCR1); + + /* set UCR4 */ + temp = readl(sport->port.membase + UCR4); + temp |= UCR4_IDDMAEN; + writel(temp, sport->port.membase + UCR4); + + sport->dma_is_enabled = 1; +} + +static void imx_disable_dma(struct imx_port *sport) +{ + unsigned long temp; + struct tty_port *port = &sport->port.state->port; + + /* clear UCR1 */ + temp = readl(sport->port.membase + UCR1); + temp &= ~(UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN); + writel(temp, sport->port.membase + UCR1); + + /* clear UCR2 */ + temp = readl(sport->port.membase + UCR2); + temp &= ~(UCR2_CTSC | UCR2_CTS); + writel(temp, sport->port.membase + UCR2); + + /* clear UCR4 */ + temp = readl(sport->port.membase + UCR4); + temp &= ~UCR4_IDDMAEN; + writel(temp, sport->port.membase + UCR4); + + sport->dma_is_enabled = 0; + port->low_latency = 0; +} + /* half the RX buffer size */ #define CTSTL 16 @@ -702,15 +1093,13 @@ static int imx_startup(struct uart_port *port) int retval; unsigned long flags, temp; - if (!uart_console(port)) { - retval = clk_prepare_enable(sport->clk_per); - if (retval) - goto error_out1; - retval = clk_prepare_enable(sport->clk_ipg); - if (retval) { - clk_disable_unprepare(sport->clk_per); - goto error_out1; - } + retval = clk_prepare_enable(sport->clk_per); + if (retval) + goto error_out1; + retval = clk_prepare_enable(sport->clk_ipg); + if (retval) { + clk_disable_unprepare(sport->clk_per); + goto error_out1; } imx_setup_ufcr(sport, 0); @@ -803,7 +1192,7 @@ static int imx_startup(struct uart_port *port) } } - if (is_imx21_uart(sport)) { + if (!is_imx1_uart(sport)) { temp = readl(sport->port.membase + UCR3); temp |= IMX21_UCR3_RXDMUXSEL; writel(temp, sport->port.membase + UCR3); @@ -833,7 +1222,7 @@ static int imx_startup(struct uart_port *port) if (USE_IRDA(sport)) { struct imxuart_platform_data *pdata; - pdata = sport->port.dev->platform_data; + pdata = dev_get_platdata(sport->port.dev); sport->irda_inv_rx = pdata->irda_inv_rx; sport->irda_inv_tx = pdata->irda_inv_tx; sport->trcv_delay = pdata->transceiver_delay; @@ -859,6 +1248,15 @@ static void imx_shutdown(struct uart_port *port) unsigned long temp; unsigned long flags; + if (sport->dma_is_enabled) { + /* We have to wait for the DMA to finish. */ + wait_event(sport->dma_wait, + !sport->dma_is_rxing && !sport->dma_is_txing); + imx_stop_rx(port); + imx_disable_dma(sport); + imx_uart_dma_exit(sport); + } + spin_lock_irqsave(&sport->port.lock, flags); temp = readl(sport->port.membase + UCR2); temp &= ~(UCR2_TXEN); @@ -867,7 +1265,7 @@ static void imx_shutdown(struct uart_port *port) if (USE_IRDA(sport)) { struct imxuart_platform_data *pdata; - pdata = sport->port.dev->platform_data; + pdata = dev_get_platdata(sport->port.dev); if (pdata->irda_enable) pdata->irda_enable(0); } @@ -901,10 +1299,8 @@ static void imx_shutdown(struct uart_port *port) writel(temp, sport->port.membase + UCR1); spin_unlock_irqrestore(&sport->port.lock, flags); - if (!uart_console(&sport->port)) { - clk_disable_unprepare(sport->clk_per); - clk_disable_unprepare(sport->clk_ipg); - } + clk_disable_unprepare(sport->clk_per); + clk_disable_unprepare(sport->clk_ipg); } static void @@ -947,6 +1343,11 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, if (sport->have_rtscts) { ucr2 &= ~UCR2_IRTS; ucr2 |= UCR2_CTSC; + + /* Can we enable the DMA support? */ + if (is_imx6q_uart(sport) && !uart_console(port) + && !sport->dma_is_inited) + imx_uart_dma_init(sport); } else { termios->c_cflag &= ~CRTSCTS; } @@ -1020,6 +1421,11 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, */ div = 1; } else { + /* custom-baudrate handling */ + div = sport->port.uartclk / (baud * 16); + if (baud == 38400 && quot != div) + baud = sport->port.uartclk / (quot * 16); + div = sport->port.uartclk / (baud * 16); if (div > 7) div = 7; @@ -1048,7 +1454,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, writel(num, sport->port.membase + UBIR); writel(denom, sport->port.membase + UBMR); - if (is_imx21_uart(sport)) + if (!is_imx1_uart(sport)) writel(sport->port.uartclk / div / 1000, sport->port.membase + IMX21_ONEMS); @@ -1060,6 +1466,8 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) imx_enable_ms(&sport->port); + if (sport->dma_is_inited && !sport->dma_is_enabled) + imx_enable_dma(sport); spin_unlock_irqrestore(&sport->port.lock, flags); } @@ -1251,6 +1659,16 @@ imx_console_write(struct console *co, const char *s, unsigned int count) unsigned int ucr1; unsigned long flags = 0; int locked = 1; + int retval; + + retval = clk_enable(sport->clk_per); + if (retval) + return; + retval = clk_enable(sport->clk_ipg); + if (retval) { + clk_disable(sport->clk_per); + return; + } if (sport->port.sysrq) locked = 0; @@ -1286,6 +1704,9 @@ imx_console_write(struct console *co, const char *s, unsigned int count) if (locked) spin_unlock_irqrestore(&sport->port.lock, flags); + + clk_disable(sport->clk_ipg); + clk_disable(sport->clk_per); } /* @@ -1359,6 +1780,7 @@ imx_console_setup(struct console *co, char *options) int bits = 8; int parity = 'n'; int flow = 'n'; + int retval; /* * Check whether an invalid uart number has been specified, and @@ -1371,6 +1793,11 @@ imx_console_setup(struct console *co, char *options) if (sport == NULL) return -ENODEV; + /* For setting the registers, we only need to enable the ipg clock. */ + retval = clk_prepare_enable(sport->clk_ipg); + if (retval) + goto error_console; + if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); else @@ -1378,7 +1805,20 @@ imx_console_setup(struct console *co, char *options) imx_setup_ufcr(sport, 0); - return uart_set_options(&sport->port, co, baud, parity, bits, flow); + retval = uart_set_options(&sport->port, co, baud, parity, bits, flow); + + clk_disable(sport->clk_ipg); + if (retval) { + clk_unprepare(sport->clk_ipg); + goto error_console; + } + + retval = clk_prepare(sport->clk_per); + if (retval) + clk_disable_unprepare(sport->clk_ipg); + +error_console: + return retval; } static struct uart_driver imx_reg; @@ -1485,7 +1925,7 @@ static inline int serial_imx_probe_dt(struct imx_port *sport, static void serial_imx_probe_pdata(struct imx_port *sport, struct platform_device *pdev) { - struct imxuart_platform_data *pdata = pdev->dev.platform_data; + struct imxuart_platform_data *pdata = dev_get_platdata(&pdev->dev); sport->port.line = pdev->id; sport->devdata = (struct imx_uart_data *) pdev->id_entry->driver_data; @@ -1507,7 +1947,6 @@ static int serial_imx_probe(struct platform_device *pdev) void __iomem *base; int ret = 0; struct resource *res; - struct pinctrl *pinctrl; sport = devm_kzalloc(&pdev->dev, sizeof(*sport), GFP_KERNEL); if (!sport) @@ -1543,13 +1982,6 @@ static int serial_imx_probe(struct platform_device *pdev) sport->timer.function = imx_timeout; sport->timer.data = (unsigned long)sport; - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); - if (IS_ERR(pinctrl)) { - ret = PTR_ERR(pinctrl); - dev_err(&pdev->dev, "failed to get default pinctrl: %d\n", ret); - return ret; - } - sport->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(sport->clk_ipg)) { ret = PTR_ERR(sport->clk_ipg); @@ -1564,18 +1996,15 @@ static int serial_imx_probe(struct platform_device *pdev) return ret; } - clk_prepare_enable(sport->clk_per); - clk_prepare_enable(sport->clk_ipg); - sport->port.uartclk = clk_get_rate(sport->clk_per); imx_ports[sport->port.line] = sport; - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); if (pdata && pdata->init) { ret = pdata->init(pdev); if (ret) - goto clkput; + return ret; } ret = uart_add_one_port(&imx_reg, &sport->port); @@ -1583,18 +2012,10 @@ static int serial_imx_probe(struct platform_device *pdev) goto deinit; platform_set_drvdata(pdev, sport); - if (!uart_console(&sport->port)) { - clk_disable_unprepare(sport->clk_per); - clk_disable_unprepare(sport->clk_ipg); - } - return 0; deinit: if (pdata && pdata->exit) pdata->exit(pdev); -clkput: - clk_disable_unprepare(sport->clk_per); - clk_disable_unprepare(sport->clk_ipg); return ret; } @@ -1603,9 +2024,7 @@ static int serial_imx_remove(struct platform_device *pdev) struct imxuart_platform_data *pdata; struct imx_port *sport = platform_get_drvdata(pdev); - pdata = pdev->dev.platform_data; - - platform_set_drvdata(pdev, NULL); + pdata = dev_get_platdata(&pdev->dev); uart_remove_one_port(&imx_reg, &sport->port); diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c index 35866d5872ad..79f9a9eff545 100644 --- a/drivers/tty/serial/max3100.c +++ b/drivers/tty/serial/max3100.c @@ -779,7 +779,7 @@ static int max3100_probe(struct spi_device *spi) max3100s[i]->irq = spi->irq; spin_lock_init(&max3100s[i]->conf_lock); spi_set_drvdata(spi, max3100s[i]); - pdata = spi->dev.platform_data; + pdata = dev_get_platdata(&spi->dev); max3100s[i]->crystal = pdata->crystal; max3100s[i]->loopback = pdata->loopback; max3100s[i]->poll_time = pdata->poll_time * HZ / 1000; diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 8941e6418942..b2e707aa603a 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1,7 +1,7 @@ /* - * Maxim (Dallas) MAX3107/8 serial driver + * Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver * - * Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru> + * Copyright (C) 2012-2013 Alexander Shiyan <shc_work@mail.ru> * * Based on max3100.c, by Christian Pellegrin <chripell@evolware.org> * Based on max3110.c, by Feng Tang <feng.tang@intel.com> @@ -13,11 +13,10 @@ * (at your option) any later version. */ -/* TODO: MAX3109 support (Dual) */ -/* TODO: MAX14830 support (Quad) */ - #include <linux/module.h> +#include <linux/delay.h> #include <linux/device.h> +#include <linux/bitops.h> #include <linux/serial_core.h> #include <linux/serial.h> #include <linux/tty.h> @@ -25,8 +24,10 @@ #include <linux/regmap.h> #include <linux/gpio.h> #include <linux/spi/spi.h> + #include <linux/platform_data/max310x.h> +#define MAX310X_NAME "max310x" #define MAX310X_MAJOR 204 #define MAX310X_MINOR 209 @@ -37,7 +38,8 @@ #define MAX310X_IRQSTS_REG (0x02) /* IRQ status */ #define MAX310X_LSR_IRQEN_REG (0x03) /* LSR IRQ enable */ #define MAX310X_LSR_IRQSTS_REG (0x04) /* LSR IRQ status */ -#define MAX310X_SPCHR_IRQEN_REG (0x05) /* Special char IRQ enable */ +#define MAX310X_REG_05 (0x05) +#define MAX310X_SPCHR_IRQEN_REG MAX310X_REG_05 /* Special char IRQ en */ #define MAX310X_SPCHR_IRQSTS_REG (0x06) /* Special char IRQ status */ #define MAX310X_STS_IRQEN_REG (0x07) /* Status IRQ enable */ #define MAX310X_STS_IRQSTS_REG (0x08) /* Status IRQ status */ @@ -63,8 +65,15 @@ #define MAX310X_BRGDIVLSB_REG (0x1c) /* Baud rate divisor LSB */ #define MAX310X_BRGDIVMSB_REG (0x1d) /* Baud rate divisor MSB */ #define MAX310X_CLKSRC_REG (0x1e) /* Clock source */ -/* Only present in MAX3107 */ -#define MAX3107_REVID_REG (0x1f) /* Revision identification */ +#define MAX310X_REG_1F (0x1f) + +#define MAX310X_REVID_REG MAX310X_REG_1F /* Revision ID */ + +#define MAX310X_GLOBALIRQ_REG MAX310X_REG_1F /* Global IRQ (RO) */ +#define MAX310X_GLOBALCMD_REG MAX310X_REG_1F /* Global Command (WO) */ + +/* Extended registers */ +#define MAX310X_REVID_EXTREG MAX310X_REG_05 /* Revision ID */ /* IRQ register bits */ #define MAX310X_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ @@ -246,58 +255,210 @@ #define MAX310X_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */ #define MAX310X_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */ +/* Global commands */ +#define MAX310X_EXTREG_ENBL (0xce) +#define MAX310X_EXTREG_DSBL (0xcd) + /* Misc definitions */ #define MAX310X_FIFO_SIZE (128) +#define MAX310x_REV_MASK (0xfc) /* MAX3107 specific */ #define MAX3107_REV_ID (0xa0) -#define MAX3107_REV_MASK (0xfe) - -/* IRQ status bits definitions */ -#define MAX310X_IRQ_TX (MAX310X_IRQ_TXFIFO_BIT | \ - MAX310X_IRQ_TXEMPTY_BIT) -#define MAX310X_IRQ_RX (MAX310X_IRQ_RXFIFO_BIT | \ - MAX310X_IRQ_RXEMPTY_BIT) - -/* Supported chip types */ -enum { - MAX310X_TYPE_MAX3107 = 3107, - MAX310X_TYPE_MAX3108 = 3108, + +/* MAX3109 specific */ +#define MAX3109_REV_ID (0xc0) + +/* MAX14830 specific */ +#define MAX14830_BRGCFG_CLKDIS_BIT (1 << 6) /* Clock Disable */ +#define MAX14830_REV_ID (0xb0) + +struct max310x_devtype { + char name[9]; + int nr; + int (*detect)(struct device *); + void (*power)(struct uart_port *, int); }; -struct max310x_port { - struct uart_driver uart; +struct max310x_one { struct uart_port port; + struct work_struct tx_work; +}; - const char *name; - int uartclk; - - unsigned int nr_gpio; +struct max310x_port { + struct uart_driver uart; + struct max310x_devtype *devtype; + struct regmap *regmap; + struct regmap_config regcfg; + struct mutex mutex; + struct max310x_pdata *pdata; + int gpio_used; #ifdef CONFIG_GPIOLIB struct gpio_chip gpio; #endif + struct max310x_one p[0]; +}; - struct regmap *regmap; - struct regmap_config regcfg; +static u8 max310x_port_read(struct uart_port *port, u8 reg) +{ + struct max310x_port *s = dev_get_drvdata(port->dev); + unsigned int val = 0; - struct workqueue_struct *wq; - struct work_struct tx_work; + regmap_read(s->regmap, port->iobase + reg, &val); - struct mutex max310x_mutex; + return val; +} - struct max310x_pdata *pdata; +static void max310x_port_write(struct uart_port *port, u8 reg, u8 val) +{ + struct max310x_port *s = dev_get_drvdata(port->dev); + + regmap_write(s->regmap, port->iobase + reg, val); +} + +static void max310x_port_update(struct uart_port *port, u8 reg, u8 mask, u8 val) +{ + struct max310x_port *s = dev_get_drvdata(port->dev); + + regmap_update_bits(s->regmap, port->iobase + reg, mask, val); +} + +static int max3107_detect(struct device *dev) +{ + struct max310x_port *s = dev_get_drvdata(dev); + unsigned int val = 0; + int ret; + + ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val); + if (ret) + return ret; + + if (((val & MAX310x_REV_MASK) != MAX3107_REV_ID)) { + dev_err(dev, + "%s ID 0x%02x does not match\n", s->devtype->name, val); + return -ENODEV; + } + + return 0; +} + +static int max3108_detect(struct device *dev) +{ + struct max310x_port *s = dev_get_drvdata(dev); + unsigned int val = 0; + int ret; + + /* MAX3108 have not REV ID register, we just check default value + * from clocksource register to make sure everything works. + */ + ret = regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val); + if (ret) + return ret; + + if (val != (MAX310X_CLKSRC_EXTCLK_BIT | MAX310X_CLKSRC_PLLBYP_BIT)) { + dev_err(dev, "%s not present\n", s->devtype->name); + return -ENODEV; + } + + return 0; +} + +static int max3109_detect(struct device *dev) +{ + struct max310x_port *s = dev_get_drvdata(dev); + unsigned int val = 0; + int ret; + + ret = regmap_read(s->regmap, MAX310X_REVID_REG, &val); + if (ret) + return ret; + + if (((val & MAX310x_REV_MASK) != MAX3109_REV_ID)) { + dev_err(dev, + "%s ID 0x%02x does not match\n", s->devtype->name, val); + return -ENODEV; + } + + return 0; +} + +static void max310x_power(struct uart_port *port, int on) +{ + max310x_port_update(port, MAX310X_MODE1_REG, + MAX310X_MODE1_FORCESLEEP_BIT, + on ? 0 : MAX310X_MODE1_FORCESLEEP_BIT); + if (on) + msleep(50); +} + +static int max14830_detect(struct device *dev) +{ + struct max310x_port *s = dev_get_drvdata(dev); + unsigned int val = 0; + int ret; + + ret = regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, + MAX310X_EXTREG_ENBL); + if (ret) + return ret; + + regmap_read(s->regmap, MAX310X_REVID_EXTREG, &val); + regmap_write(s->regmap, MAX310X_GLOBALCMD_REG, MAX310X_EXTREG_DSBL); + if (((val & MAX310x_REV_MASK) != MAX14830_REV_ID)) { + dev_err(dev, + "%s ID 0x%02x does not match\n", s->devtype->name, val); + return -ENODEV; + } + + return 0; +} + +static void max14830_power(struct uart_port *port, int on) +{ + max310x_port_update(port, MAX310X_BRGCFG_REG, + MAX14830_BRGCFG_CLKDIS_BIT, + on ? 0 : MAX14830_BRGCFG_CLKDIS_BIT); + if (on) + msleep(50); +} + +static const struct max310x_devtype max3107_devtype = { + .name = "MAX3107", + .nr = 1, + .detect = max3107_detect, + .power = max310x_power, +}; + +static const struct max310x_devtype max3108_devtype = { + .name = "MAX3108", + .nr = 1, + .detect = max3108_detect, + .power = max310x_power, +}; + +static const struct max310x_devtype max3109_devtype = { + .name = "MAX3109", + .nr = 2, + .detect = max3109_detect, + .power = max310x_power, +}; + +static const struct max310x_devtype max14830_devtype = { + .name = "MAX14830", + .nr = 4, + .detect = max14830_detect, + .power = max14830_power, }; -static bool max3107_8_reg_writeable(struct device *dev, unsigned int reg) +static bool max310x_reg_writeable(struct device *dev, unsigned int reg) { - switch (reg) { + switch (reg & 0x1f) { case MAX310X_IRQSTS_REG: case MAX310X_LSR_IRQSTS_REG: case MAX310X_SPCHR_IRQSTS_REG: case MAX310X_STS_IRQSTS_REG: case MAX310X_TXFIFOLVL_REG: case MAX310X_RXFIFOLVL_REG: - case MAX3107_REVID_REG: /* Only available on MAX3107 */ return false; default: break; @@ -308,7 +469,7 @@ static bool max3107_8_reg_writeable(struct device *dev, unsigned int reg) static bool max310x_reg_volatile(struct device *dev, unsigned int reg) { - switch (reg) { + switch (reg & 0x1f) { case MAX310X_RHR_REG: case MAX310X_IRQSTS_REG: case MAX310X_LSR_IRQSTS_REG: @@ -317,6 +478,9 @@ static bool max310x_reg_volatile(struct device *dev, unsigned int reg) case MAX310X_TXFIFOLVL_REG: case MAX310X_RXFIFOLVL_REG: case MAX310X_GPIODATA_REG: + case MAX310X_BRGDIVLSB_REG: + case MAX310X_REG_05: + case MAX310X_REG_1F: return true; default: break; @@ -327,7 +491,7 @@ static bool max310x_reg_volatile(struct device *dev, unsigned int reg) static bool max310x_reg_precious(struct device *dev, unsigned int reg) { - switch (reg) { + switch (reg & 0x1f) { case MAX310X_RHR_REG: case MAX310X_IRQSTS_REG: case MAX310X_SPCHR_IRQSTS_REG: @@ -340,42 +504,25 @@ static bool max310x_reg_precious(struct device *dev, unsigned int reg) return false; } -static void max310x_set_baud(struct max310x_port *s, int baud) +static void max310x_set_baud(struct uart_port *port, int baud) { - unsigned int mode = 0, div = s->uartclk / baud; + unsigned int mode = 0, div = port->uartclk / baud; if (!(div / 16)) { /* Mode x2 */ mode = MAX310X_BRGCFG_2XMODE_BIT; - div = (s->uartclk * 2) / baud; + div = (port->uartclk * 2) / baud; } if (!(div / 16)) { /* Mode x4 */ mode = MAX310X_BRGCFG_4XMODE_BIT; - div = (s->uartclk * 4) / baud; + div = (port->uartclk * 4) / baud; } - regmap_write(s->regmap, MAX310X_BRGDIVMSB_REG, - ((div / 16) >> 8) & 0xff); - regmap_write(s->regmap, MAX310X_BRGDIVLSB_REG, (div / 16) & 0xff); - regmap_write(s->regmap, MAX310X_BRGCFG_REG, (div % 16) | mode); -} - -static void max310x_wait_pll(struct max310x_port *s) -{ - int tryes = 1000; - - /* Wait for PLL only if crystal is used */ - if (!(s->pdata->driver_flags & MAX310X_EXT_CLK)) { - unsigned int sts = 0; - - while (tryes--) { - regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &sts); - if (sts & MAX310X_STS_CLKREADY_BIT) - break; - } - } + max310x_port_write(port, MAX310X_BRGDIVMSB_REG, (div / 16) >> 8); + max310x_port_write(port, MAX310X_BRGDIVLSB_REG, div / 16); + max310x_port_write(port, MAX310X_BRGCFG_REG, (div % 16) | mode); } static int max310x_update_best_err(unsigned long f, long *besterr) @@ -449,49 +596,49 @@ static int max310x_set_ref_clk(struct max310x_port *s) regmap_write(s->regmap, MAX310X_CLKSRC_REG, clksrc); - if (pllcfg) - max310x_wait_pll(s); - - dev_dbg(s->port.dev, "Reference clock set to %lu Hz\n", bestfreq); + /* Wait for crystal */ + if (pllcfg && !(s->pdata->driver_flags & MAX310X_EXT_CLK)) + msleep(10); return (int)bestfreq; } -static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen) +static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) { - unsigned int sts = 0, ch = 0, flag; + unsigned int sts, ch, flag; - if (unlikely(rxlen >= MAX310X_FIFO_SIZE)) { - dev_warn(s->port.dev, "Possible RX FIFO overrun %d\n", rxlen); + if (unlikely(rxlen >= port->fifosize)) { + dev_warn_ratelimited(port->dev, + "Port %i: Possible RX FIFO overrun\n", + port->line); + port->icount.buf_overrun++; /* Ensure sanity of RX level */ - rxlen = MAX310X_FIFO_SIZE; + rxlen = port->fifosize; } - dev_dbg(s->port.dev, "RX Len = %u\n", rxlen); - while (rxlen--) { - regmap_read(s->regmap, MAX310X_RHR_REG, &ch); - regmap_read(s->regmap, MAX310X_LSR_IRQSTS_REG, &sts); + ch = max310x_port_read(port, MAX310X_RHR_REG); + sts = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); sts &= MAX310X_LSR_RXPAR_BIT | MAX310X_LSR_FRERR_BIT | MAX310X_LSR_RXOVR_BIT | MAX310X_LSR_RXBRK_BIT; - s->port.icount.rx++; + port->icount.rx++; flag = TTY_NORMAL; if (unlikely(sts)) { if (sts & MAX310X_LSR_RXBRK_BIT) { - s->port.icount.brk++; - if (uart_handle_break(&s->port)) + port->icount.brk++; + if (uart_handle_break(port)) continue; } else if (sts & MAX310X_LSR_RXPAR_BIT) - s->port.icount.parity++; + port->icount.parity++; else if (sts & MAX310X_LSR_FRERR_BIT) - s->port.icount.frame++; + port->icount.frame++; else if (sts & MAX310X_LSR_RXOVR_BIT) - s->port.icount.overrun++; + port->icount.overrun++; - sts &= s->port.read_status_mask; + sts &= port->read_status_mask; if (sts & MAX310X_LSR_RXBRK_BIT) flag = TTY_BREAK; else if (sts & MAX310X_LSR_RXPAR_BIT) @@ -502,129 +649,129 @@ static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen) flag = TTY_OVERRUN; } - if (uart_handle_sysrq_char(s->port, ch)) + if (uart_handle_sysrq_char(port, ch)) continue; - if (sts & s->port.ignore_status_mask) + if (sts & port->ignore_status_mask) continue; - uart_insert_char(&s->port, sts, MAX310X_LSR_RXOVR_BIT, - ch, flag); + uart_insert_char(port, sts, MAX310X_LSR_RXOVR_BIT, ch, flag); } - tty_flip_buffer_push(&s->port.state->port); + tty_flip_buffer_push(&port->state->port); } -static void max310x_handle_tx(struct max310x_port *s) +static void max310x_handle_tx(struct uart_port *port) { - struct circ_buf *xmit = &s->port.state->xmit; - unsigned int txlen = 0, to_send; + struct circ_buf *xmit = &port->state->xmit; + unsigned int txlen, to_send; - if (unlikely(s->port.x_char)) { - regmap_write(s->regmap, MAX310X_THR_REG, s->port.x_char); - s->port.icount.tx++; - s->port.x_char = 0; + if (unlikely(port->x_char)) { + max310x_port_write(port, MAX310X_THR_REG, port->x_char); + port->icount.tx++; + port->x_char = 0; return; } - if (uart_circ_empty(xmit) || uart_tx_stopped(&s->port)) + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) return; /* Get length of data pending in circular buffer */ to_send = uart_circ_chars_pending(xmit); if (likely(to_send)) { /* Limit to size of TX FIFO */ - regmap_read(s->regmap, MAX310X_TXFIFOLVL_REG, &txlen); - txlen = MAX310X_FIFO_SIZE - txlen; + txlen = max310x_port_read(port, MAX310X_TXFIFOLVL_REG); + txlen = port->fifosize - txlen; to_send = (to_send > txlen) ? txlen : to_send; - dev_dbg(s->port.dev, "TX Len = %u\n", to_send); - /* Add data to send */ - s->port.icount.tx += to_send; + port->icount.tx += to_send; while (to_send--) { - regmap_write(s->regmap, MAX310X_THR_REG, - xmit->buf[xmit->tail]); + max310x_port_write(port, MAX310X_THR_REG, + xmit->buf[xmit->tail]); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); }; } if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&s->port); + uart_write_wakeup(port); } -static irqreturn_t max310x_ist(int irq, void *dev_id) +static void max310x_port_irq(struct max310x_port *s, int portno) { - struct max310x_port *s = (struct max310x_port *)dev_id; - unsigned int ists = 0, lsr = 0, rxlen = 0; + struct uart_port *port = &s->p[portno].port; - mutex_lock(&s->max310x_mutex); + do { + unsigned int ists, lsr, rxlen; - for (;;) { /* Read IRQ status & RX FIFO level */ - regmap_read(s->regmap, MAX310X_IRQSTS_REG, &ists); - regmap_read(s->regmap, MAX310X_LSR_IRQSTS_REG, &lsr); - regmap_read(s->regmap, MAX310X_RXFIFOLVL_REG, &rxlen); - if (!ists && !(lsr & MAX310X_LSR_RXTO_BIT) && !rxlen) + ists = max310x_port_read(port, MAX310X_IRQSTS_REG); + rxlen = max310x_port_read(port, MAX310X_RXFIFOLVL_REG); + if (!ists && !rxlen) break; - dev_dbg(s->port.dev, "IRQ status: 0x%02x\n", ists); - - if (rxlen) - max310x_handle_rx(s, rxlen); - if (ists & MAX310X_IRQ_TX) - max310x_handle_tx(s); - if (ists & MAX310X_IRQ_CTS_BIT) - uart_handle_cts_change(&s->port, + if (ists & MAX310X_IRQ_CTS_BIT) { + lsr = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); + uart_handle_cts_change(port, !!(lsr & MAX310X_LSR_CTS_BIT)); - } + } + if (rxlen) + max310x_handle_rx(port, rxlen); + if (ists & MAX310X_IRQ_TXEMPTY_BIT) { + mutex_lock(&s->mutex); + max310x_handle_tx(port); + mutex_unlock(&s->mutex); + } + } while (1); +} + +static irqreturn_t max310x_ist(int irq, void *dev_id) +{ + struct max310x_port *s = (struct max310x_port *)dev_id; - mutex_unlock(&s->max310x_mutex); + if (s->uart.nr > 1) { + do { + unsigned int val = ~0; + + WARN_ON_ONCE(regmap_read(s->regmap, + MAX310X_GLOBALIRQ_REG, &val)); + val = ((1 << s->uart.nr) - 1) & ~val; + if (!val) + break; + max310x_port_irq(s, fls(val) - 1); + } while (1); + } else + max310x_port_irq(s, 0); return IRQ_HANDLED; } static void max310x_wq_proc(struct work_struct *ws) { - struct max310x_port *s = container_of(ws, struct max310x_port, tx_work); + struct max310x_one *one = container_of(ws, struct max310x_one, tx_work); + struct max310x_port *s = dev_get_drvdata(one->port.dev); - mutex_lock(&s->max310x_mutex); - max310x_handle_tx(s); - mutex_unlock(&s->max310x_mutex); + mutex_lock(&s->mutex); + max310x_handle_tx(&one->port); + mutex_unlock(&s->mutex); } static void max310x_start_tx(struct uart_port *port) { - struct max310x_port *s = container_of(port, struct max310x_port, port); - - queue_work(s->wq, &s->tx_work); -} - -static void max310x_stop_tx(struct uart_port *port) -{ - /* Do nothing */ -} + struct max310x_one *one = container_of(port, struct max310x_one, port); -static void max310x_stop_rx(struct uart_port *port) -{ - /* Do nothing */ + if (!work_pending(&one->tx_work)) + schedule_work(&one->tx_work); } static unsigned int max310x_tx_empty(struct uart_port *port) { - unsigned int val = 0; - struct max310x_port *s = container_of(port, struct max310x_port, port); + unsigned int lvl, sts; - mutex_lock(&s->max310x_mutex); - regmap_read(s->regmap, MAX310X_TXFIFOLVL_REG, &val); - mutex_unlock(&s->max310x_mutex); + lvl = max310x_port_read(port, MAX310X_TXFIFOLVL_REG); + sts = max310x_port_read(port, MAX310X_IRQSTS_REG); - return val ? 0 : TIOCSER_TEMT; -} - -static void max310x_enable_ms(struct uart_port *port) -{ - /* Modem status not supported */ + return ((sts & MAX310X_IRQ_TXEMPTY_BIT) && !lvl) ? TIOCSER_TEMT : 0; } static unsigned int max310x_get_mctrl(struct uart_port *port) @@ -644,28 +791,20 @@ static void max310x_set_mctrl(struct uart_port *port, unsigned int mctrl) static void max310x_break_ctl(struct uart_port *port, int break_state) { - struct max310x_port *s = container_of(port, struct max310x_port, port); - - mutex_lock(&s->max310x_mutex); - regmap_update_bits(s->regmap, MAX310X_LCR_REG, - MAX310X_LCR_TXBREAK_BIT, - break_state ? MAX310X_LCR_TXBREAK_BIT : 0); - mutex_unlock(&s->max310x_mutex); + max310x_port_update(port, MAX310X_LCR_REG, + MAX310X_LCR_TXBREAK_BIT, + break_state ? MAX310X_LCR_TXBREAK_BIT : 0); } static void max310x_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - struct max310x_port *s = container_of(port, struct max310x_port, port); unsigned int lcr, flow = 0; int baud; - mutex_lock(&s->max310x_mutex); - /* Mask termios capabilities we don't support */ termios->c_cflag &= ~CMSPAR; - termios->c_iflag &= ~IXANY; /* Word size */ switch (termios->c_cflag & CSIZE) { @@ -696,7 +835,7 @@ static void max310x_set_termios(struct uart_port *port, lcr |= MAX310X_LCR_STOPLEN_BIT; /* 2 stops */ /* Update LCR register */ - regmap_write(s->regmap, MAX310X_LCR_REG, lcr); + max310x_port_write(port, MAX310X_LCR_REG, lcr); /* Set read status mask */ port->read_status_mask = MAX310X_LSR_RXOVR_BIT; @@ -717,8 +856,8 @@ static void max310x_set_termios(struct uart_port *port, MAX310X_LSR_RXBRK_BIT; /* Configure flow control */ - regmap_write(s->regmap, MAX310X_XON1_REG, termios->c_cc[VSTART]); - regmap_write(s->regmap, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]); + max310x_port_write(port, MAX310X_XON1_REG, termios->c_cc[VSTART]); + max310x_port_write(port, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]); if (termios->c_cflag & CRTSCTS) flow |= MAX310X_FLOWCTRL_AUTOCTS_BIT | MAX310X_FLOWCTRL_AUTORTS_BIT; @@ -728,7 +867,7 @@ static void max310x_set_termios(struct uart_port *port, if (termios->c_iflag & IXOFF) flow |= MAX310X_FLOWCTRL_SWFLOW1_BIT | MAX310X_FLOWCTRL_SWFLOWEN_BIT; - regmap_write(s->regmap, MAX310X_FLOWCTRL_REG, flow); + max310x_port_write(port, MAX310X_FLOWCTRL_REG, flow); /* Get baud rate generator configuration */ baud = uart_get_baud_rate(port, termios, old, @@ -736,36 +875,30 @@ static void max310x_set_termios(struct uart_port *port, port->uartclk / 4); /* Setup baudrate generator */ - max310x_set_baud(s, baud); + max310x_set_baud(port, baud); /* Update timeout according to new baud rate */ uart_update_timeout(port, termios->c_cflag, baud); - - mutex_unlock(&s->max310x_mutex); } static int max310x_startup(struct uart_port *port) { unsigned int val, line = port->line; - struct max310x_port *s = container_of(port, struct max310x_port, port); - - if (s->pdata->suspend) - s->pdata->suspend(0); + struct max310x_port *s = dev_get_drvdata(port->dev); - mutex_lock(&s->max310x_mutex); + s->devtype->power(port, 1); /* Configure baud rate, 9600 as default */ - max310x_set_baud(s, 9600); + max310x_set_baud(port, 9600); /* Configure LCR register, 8N1 mode by default */ - val = MAX310X_LCR_WORD_LEN_8; - regmap_write(s->regmap, MAX310X_LCR_REG, val); + max310x_port_write(port, MAX310X_LCR_REG, MAX310X_LCR_WORD_LEN_8); /* Configure MODE1 register */ - regmap_update_bits(s->regmap, MAX310X_MODE1_REG, - MAX310X_MODE1_TRNSCVCTRL_BIT, - (s->pdata->uart_flags[line] & MAX310X_AUTO_DIR_CTRL) - ? MAX310X_MODE1_TRNSCVCTRL_BIT : 0); + max310x_port_update(port, MAX310X_MODE1_REG, + MAX310X_MODE1_TRNSCVCTRL_BIT, + (s->pdata->uart_flags[line] & MAX310X_AUTO_DIR_CTRL) + ? MAX310X_MODE1_TRNSCVCTRL_BIT : 0); /* Configure MODE2 register */ val = MAX310X_MODE2_RXEMPTINV_BIT; @@ -776,63 +909,40 @@ static int max310x_startup(struct uart_port *port) /* Reset FIFOs */ val |= MAX310X_MODE2_FIFORST_BIT; - regmap_write(s->regmap, MAX310X_MODE2_REG, val); - - /* Configure FIFO trigger level register */ - /* RX FIFO trigger for 16 words, TX FIFO trigger for 64 words */ - val = MAX310X_FIFOTRIGLVL_RX(16) | MAX310X_FIFOTRIGLVL_TX(64); - regmap_write(s->regmap, MAX310X_FIFOTRIGLVL_REG, val); + max310x_port_write(port, MAX310X_MODE2_REG, val); + max310x_port_update(port, MAX310X_MODE2_REG, + MAX310X_MODE2_FIFORST_BIT, 0); /* Configure flow control levels */ /* Flow control halt level 96, resume level 48 */ - val = MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96); - regmap_write(s->regmap, MAX310X_FLOWLVL_REG, val); - - /* Clear timeout register */ - regmap_write(s->regmap, MAX310X_RXTO_REG, 0); + max310x_port_write(port, MAX310X_FLOWLVL_REG, + MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96)); - /* Configure LSR interrupt enable register */ - /* Enable RX timeout interrupt */ - val = MAX310X_LSR_RXTO_BIT; - regmap_write(s->regmap, MAX310X_LSR_IRQEN_REG, val); + /* Clear IRQ status register */ + max310x_port_read(port, MAX310X_IRQSTS_REG); - /* Clear FIFO reset */ - regmap_update_bits(s->regmap, MAX310X_MODE2_REG, - MAX310X_MODE2_FIFORST_BIT, 0); - - /* Clear IRQ status register by reading it */ - regmap_read(s->regmap, MAX310X_IRQSTS_REG, &val); - - /* Configure interrupt enable register */ - /* Enable CTS change interrupt */ - val = MAX310X_IRQ_CTS_BIT; - /* Enable RX, TX interrupts */ - val |= MAX310X_IRQ_RX | MAX310X_IRQ_TX; - regmap_write(s->regmap, MAX310X_IRQEN_REG, val); - - mutex_unlock(&s->max310x_mutex); + /* Enable RX, TX, CTS change interrupts */ + val = MAX310X_IRQ_RXEMPTY_BIT | MAX310X_IRQ_TXEMPTY_BIT; + max310x_port_write(port, MAX310X_IRQEN_REG, val | MAX310X_IRQ_CTS_BIT); return 0; } static void max310x_shutdown(struct uart_port *port) { - struct max310x_port *s = container_of(port, struct max310x_port, port); + struct max310x_port *s = dev_get_drvdata(port->dev); /* Disable all interrupts */ - mutex_lock(&s->max310x_mutex); - regmap_write(s->regmap, MAX310X_IRQEN_REG, 0); - mutex_unlock(&s->max310x_mutex); + max310x_port_write(port, MAX310X_IRQEN_REG, 0); - if (s->pdata->suspend) - s->pdata->suspend(1); + s->devtype->power(port, 0); } static const char *max310x_type(struct uart_port *port) { - struct max310x_port *s = container_of(port, struct max310x_port, port); + struct max310x_port *s = dev_get_drvdata(port->dev); - return (port->type == PORT_MAX310X) ? s->name : NULL; + return (port->type == PORT_MAX310X) ? s->devtype->name : NULL; } static int max310x_request_port(struct uart_port *port) @@ -841,134 +951,99 @@ static int max310x_request_port(struct uart_port *port) return 0; } -static void max310x_release_port(struct uart_port *port) -{ - /* Do nothing */ -} - static void max310x_config_port(struct uart_port *port, int flags) { if (flags & UART_CONFIG_TYPE) port->type = PORT_MAX310X; } -static int max310x_verify_port(struct uart_port *port, struct serial_struct *ser) +static int max310x_verify_port(struct uart_port *port, struct serial_struct *s) { - if ((ser->type == PORT_UNKNOWN) || (ser->type == PORT_MAX310X)) - return 0; - if (ser->irq == port->irq) - return 0; + if ((s->type != PORT_UNKNOWN) && (s->type != PORT_MAX310X)) + return -EINVAL; + if (s->irq != port->irq) + return -EINVAL; - return -EINVAL; + return 0; } -static struct uart_ops max310x_ops = { +static void max310x_null_void(struct uart_port *port) +{ + /* Do nothing */ +} + +static const struct uart_ops max310x_ops = { .tx_empty = max310x_tx_empty, .set_mctrl = max310x_set_mctrl, .get_mctrl = max310x_get_mctrl, - .stop_tx = max310x_stop_tx, + .stop_tx = max310x_null_void, .start_tx = max310x_start_tx, - .stop_rx = max310x_stop_rx, - .enable_ms = max310x_enable_ms, + .stop_rx = max310x_null_void, + .enable_ms = max310x_null_void, .break_ctl = max310x_break_ctl, .startup = max310x_startup, .shutdown = max310x_shutdown, .set_termios = max310x_set_termios, .type = max310x_type, .request_port = max310x_request_port, - .release_port = max310x_release_port, + .release_port = max310x_null_void, .config_port = max310x_config_port, .verify_port = max310x_verify_port, }; -#ifdef CONFIG_PM_SLEEP - -static int max310x_suspend(struct device *dev) +static int __maybe_unused max310x_suspend(struct device *dev) { - int ret; struct max310x_port *s = dev_get_drvdata(dev); + int i; - dev_dbg(dev, "Suspend\n"); - - ret = uart_suspend_port(&s->uart, &s->port); - - mutex_lock(&s->max310x_mutex); - - /* Enable sleep mode */ - regmap_update_bits(s->regmap, MAX310X_MODE1_REG, - MAX310X_MODE1_FORCESLEEP_BIT, - MAX310X_MODE1_FORCESLEEP_BIT); - - mutex_unlock(&s->max310x_mutex); - - if (s->pdata->suspend) - s->pdata->suspend(1); + for (i = 0; i < s->uart.nr; i++) { + uart_suspend_port(&s->uart, &s->p[i].port); + s->devtype->power(&s->p[i].port, 0); + } - return ret; + return 0; } -static int max310x_resume(struct device *dev) +static int __maybe_unused max310x_resume(struct device *dev) { struct max310x_port *s = dev_get_drvdata(dev); + int i; - dev_dbg(dev, "Resume\n"); - - if (s->pdata->suspend) - s->pdata->suspend(0); - - mutex_lock(&s->max310x_mutex); - - /* Disable sleep mode */ - regmap_update_bits(s->regmap, MAX310X_MODE1_REG, - MAX310X_MODE1_FORCESLEEP_BIT, - 0); - - max310x_wait_pll(s); - - mutex_unlock(&s->max310x_mutex); + for (i = 0; i < s->uart.nr; i++) { + s->devtype->power(&s->p[i].port, 1); + uart_resume_port(&s->uart, &s->p[i].port); + } - return uart_resume_port(&s->uart, &s->port); + return 0; } -static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume); -#define MAX310X_PM_OPS (&max310x_pm_ops) - -#else -#define MAX310X_PM_OPS NULL -#endif - #ifdef CONFIG_GPIOLIB static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset) { - unsigned int val = 0; + unsigned int val; struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + struct uart_port *port = &s->p[offset / 4].port; - mutex_lock(&s->max310x_mutex); - regmap_read(s->regmap, MAX310X_GPIODATA_REG, &val); - mutex_unlock(&s->max310x_mutex); + val = max310x_port_read(port, MAX310X_GPIODATA_REG); - return !!((val >> 4) & (1 << offset)); + return !!((val >> 4) & (1 << (offset % 4))); } static void max310x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + struct uart_port *port = &s->p[offset / 4].port; - mutex_lock(&s->max310x_mutex); - regmap_update_bits(s->regmap, MAX310X_GPIODATA_REG, 1 << offset, value ? - 1 << offset : 0); - mutex_unlock(&s->max310x_mutex); + max310x_port_update(port, MAX310X_GPIODATA_REG, 1 << (offset % 4), + value ? 1 << (offset % 4) : 0); } static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + struct uart_port *port = &s->p[offset / 4].port; - mutex_lock(&s->max310x_mutex); - - regmap_update_bits(s->regmap, MAX310X_GPIOCFG_REG, 1 << offset, 0); - - mutex_unlock(&s->max310x_mutex); + max310x_port_update(port, MAX310X_GPIOCFG_REG, 1 << (offset % 4), 0); return 0; } @@ -977,74 +1052,42 @@ static int max310x_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + struct uart_port *port = &s->p[offset / 4].port; - mutex_lock(&s->max310x_mutex); - - regmap_update_bits(s->regmap, MAX310X_GPIOCFG_REG, 1 << offset, - 1 << offset); - regmap_update_bits(s->regmap, MAX310X_GPIODATA_REG, 1 << offset, value ? - 1 << offset : 0); - - mutex_unlock(&s->max310x_mutex); + max310x_port_update(port, MAX310X_GPIODATA_REG, 1 << (offset % 4), + value ? 1 << (offset % 4) : 0); + max310x_port_update(port, MAX310X_GPIOCFG_REG, 1 << (offset % 4), + 1 << (offset % 4)); return 0; } #endif -/* Generic platform data */ -static struct max310x_pdata generic_plat_data = { - .driver_flags = MAX310X_EXT_CLK, - .uart_flags[0] = MAX310X_ECHO_SUPRESS, - .frequency = 26000000, -}; - -static int max310x_probe(struct spi_device *spi) +static int max310x_probe(struct device *dev, int is_spi, + struct max310x_devtype *devtype, int irq) { struct max310x_port *s; - struct device *dev = &spi->dev; - int chiptype = spi_get_device_id(spi)->driver_data; - struct max310x_pdata *pdata = dev->platform_data; - unsigned int val = 0; - int ret; + struct max310x_pdata *pdata = dev_get_platdata(dev); + int i, ret, uartclk; /* Check for IRQ */ - if (spi->irq <= 0) { + if (irq <= 0) { dev_err(dev, "No IRQ specified\n"); return -ENOTSUPP; } + if (!pdata) { + dev_err(dev, "No platform data supplied\n"); + return -EINVAL; + } + /* Alloc port structure */ - s = devm_kzalloc(dev, sizeof(struct max310x_port), GFP_KERNEL); + s = devm_kzalloc(dev, sizeof(*s) + + sizeof(struct max310x_one) * devtype->nr, GFP_KERNEL); if (!s) { dev_err(dev, "Error allocating port structure\n"); return -ENOMEM; } - dev_set_drvdata(dev, s); - - if (!pdata) { - dev_warn(dev, "No platform data supplied, using defaults\n"); - pdata = &generic_plat_data; - } - s->pdata = pdata; - - /* Individual chip settings */ - switch (chiptype) { - case MAX310X_TYPE_MAX3107: - s->name = "MAX3107"; - s->nr_gpio = 4; - s->uart.nr = 1; - s->regcfg.max_register = 0x1f; - break; - case MAX310X_TYPE_MAX3108: - s->name = "MAX3108"; - s->nr_gpio = 4; - s->uart.nr = 1; - s->regcfg.max_register = 0x1e; - break; - default: - dev_err(dev, "Unsupported chip type %i\n", chiptype); - return -ENOTSUPP; - } /* Check input frequency */ if ((pdata->driver_flags & MAX310X_EXT_CLK) && @@ -1055,13 +1098,11 @@ static int max310x_probe(struct spi_device *spi) ((pdata->frequency < 1000000) || (pdata->frequency > 4000000))) goto err_freq; - mutex_init(&s->max310x_mutex); + s->pdata = pdata; + s->devtype = devtype; + dev_set_drvdata(dev, s); - /* Setup SPI bus */ - spi->mode = SPI_MODE_0; - spi->bits_per_word = 8; - spi->max_speed_hz = 26000000; - spi_setup(spi); + mutex_init(&s->mutex); /* Setup regmap */ s->regcfg.reg_bits = 8; @@ -1069,109 +1110,100 @@ static int max310x_probe(struct spi_device *spi) s->regcfg.read_flag_mask = 0x00; s->regcfg.write_flag_mask = 0x80; s->regcfg.cache_type = REGCACHE_RBTREE; - s->regcfg.writeable_reg = max3107_8_reg_writeable; + s->regcfg.writeable_reg = max310x_reg_writeable; s->regcfg.volatile_reg = max310x_reg_volatile; s->regcfg.precious_reg = max310x_reg_precious; - s->regmap = devm_regmap_init_spi(spi, &s->regcfg); + s->regcfg.max_register = devtype->nr * 0x20 - 1; + + if (IS_ENABLED(CONFIG_SPI_MASTER) && is_spi) { + struct spi_device *spi = to_spi_device(dev); + + s->regmap = devm_regmap_init_spi(spi, &s->regcfg); + } else + return -ENOTSUPP; + if (IS_ERR(s->regmap)) { - ret = PTR_ERR(s->regmap); dev_err(dev, "Failed to initialize register map\n"); - goto err_out; - } - - /* Reset chip & check SPI function */ - ret = regmap_write(s->regmap, MAX310X_MODE2_REG, MAX310X_MODE2_RST_BIT); - if (ret) { - dev_err(dev, "SPI transfer failed\n"); - goto err_out; - } - /* Clear chip reset */ - regmap_write(s->regmap, MAX310X_MODE2_REG, 0); - - switch (chiptype) { - case MAX310X_TYPE_MAX3107: - /* Check REV ID to ensure we are talking to what we expect */ - regmap_read(s->regmap, MAX3107_REVID_REG, &val); - if (((val & MAX3107_REV_MASK) != MAX3107_REV_ID)) { - dev_err(dev, "%s ID 0x%02x does not match\n", - s->name, val); - ret = -ENODEV; - goto err_out; - } - break; - case MAX310X_TYPE_MAX3108: - /* MAX3108 have not REV ID register, we just check default value - * from clocksource register to make sure everything works. - */ - regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val); - if (val != (MAX310X_CLKSRC_EXTCLK_BIT | - MAX310X_CLKSRC_PLLBYP_BIT)) { - dev_err(dev, "%s not present\n", s->name); - ret = -ENODEV; - goto err_out; - } - break; + return PTR_ERR(s->regmap); } /* Board specific configure */ - if (pdata->init) - pdata->init(); - if (pdata->suspend) - pdata->suspend(0); - - /* Calculate referecne clock */ - s->uartclk = max310x_set_ref_clk(s); - - /* Disable all interrupts */ - regmap_write(s->regmap, MAX310X_IRQEN_REG, 0); - - /* Setup MODE1 register */ - val = MAX310X_MODE1_IRQSEL_BIT; /* Enable IRQ pin */ - if (pdata->driver_flags & MAX310X_AUTOSLEEP) - val = MAX310X_MODE1_AUTOSLEEP_BIT; - regmap_write(s->regmap, MAX310X_MODE1_REG, val); - - /* Setup interrupt */ - ret = devm_request_threaded_irq(dev, spi->irq, NULL, max310x_ist, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT, - dev_name(dev), s); - if (ret) { - dev_err(dev, "Unable to reguest IRQ %i\n", spi->irq); - goto err_out; + if (s->pdata->init) + s->pdata->init(); + + /* Check device to ensure we are talking to what we expect */ + ret = devtype->detect(dev); + if (ret) + return ret; + + for (i = 0; i < devtype->nr; i++) { + unsigned int offs = i << 5; + + /* Reset port */ + regmap_write(s->regmap, MAX310X_MODE2_REG + offs, + MAX310X_MODE2_RST_BIT); + /* Clear port reset */ + regmap_write(s->regmap, MAX310X_MODE2_REG + offs, 0); + + /* Wait for port startup */ + do { + regmap_read(s->regmap, + MAX310X_BRGDIVLSB_REG + offs, &ret); + } while (ret != 0x01); + + regmap_update_bits(s->regmap, MAX310X_MODE1_REG + offs, + MAX310X_MODE1_AUTOSLEEP_BIT, + MAX310X_MODE1_AUTOSLEEP_BIT); } + uartclk = max310x_set_ref_clk(s); + dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk); + /* Register UART driver */ s->uart.owner = THIS_MODULE; - s->uart.driver_name = dev_name(dev); s->uart.dev_name = "ttyMAX"; s->uart.major = MAX310X_MAJOR; s->uart.minor = MAX310X_MINOR; + s->uart.nr = devtype->nr; ret = uart_register_driver(&s->uart); if (ret) { dev_err(dev, "Registering UART driver failed\n"); - goto err_out; + return ret; } - /* Initialize workqueue for start TX */ - s->wq = create_freezable_workqueue(dev_name(dev)); - INIT_WORK(&s->tx_work, max310x_wq_proc); - - /* Initialize UART port data */ - s->port.line = 0; - s->port.dev = dev; - s->port.irq = spi->irq; - s->port.type = PORT_MAX310X; - s->port.fifosize = MAX310X_FIFO_SIZE; - s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; - s->port.iotype = UPIO_PORT; - s->port.membase = (void __iomem *)0xffffffff; /* Bogus value */ - s->port.uartclk = s->uartclk; - s->port.ops = &max310x_ops; - uart_add_one_port(&s->uart, &s->port); + for (i = 0; i < devtype->nr; i++) { + /* Initialize port data */ + s->p[i].port.line = i; + s->p[i].port.dev = dev; + s->p[i].port.irq = irq; + s->p[i].port.type = PORT_MAX310X; + s->p[i].port.fifosize = MAX310X_FIFO_SIZE; + s->p[i].port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE | + UPF_LOW_LATENCY; + s->p[i].port.iotype = UPIO_PORT; + s->p[i].port.iobase = i * 0x20; + s->p[i].port.membase = (void __iomem *)~0; + s->p[i].port.uartclk = uartclk; + s->p[i].port.ops = &max310x_ops; + /* Disable all interrupts */ + max310x_port_write(&s->p[i].port, MAX310X_IRQEN_REG, 0); + /* Clear IRQ status register */ + max310x_port_read(&s->p[i].port, MAX310X_IRQSTS_REG); + /* Enable IRQ pin */ + max310x_port_update(&s->p[i].port, MAX310X_MODE1_REG, + MAX310X_MODE1_IRQSEL_BIT, + MAX310X_MODE1_IRQSEL_BIT); + /* Initialize queue for start TX */ + INIT_WORK(&s->p[i].tx_work, max310x_wq_proc); + /* Register port */ + uart_add_one_port(&s->uart, &s->p[i].port); + /* Go to suspend mode */ + devtype->power(&s->p[i].port, 0); + } #ifdef CONFIG_GPIOLIB /* Setup GPIO cotroller */ - if (pdata->gpio_base) { + if (s->pdata->gpio_base) { s->gpio.owner = THIS_MODULE; s->gpio.dev = dev; s->gpio.label = dev_name(dev); @@ -1179,86 +1211,107 @@ static int max310x_probe(struct spi_device *spi) s->gpio.get = max310x_gpio_get; s->gpio.direction_output= max310x_gpio_direction_output; s->gpio.set = max310x_gpio_set; - s->gpio.base = pdata->gpio_base; - s->gpio.ngpio = s->nr_gpio; + s->gpio.base = s->pdata->gpio_base; + s->gpio.ngpio = devtype->nr * 4; s->gpio.can_sleep = 1; - if (gpiochip_add(&s->gpio)) { - /* Indicate that we should not call gpiochip_remove */ - s->gpio.base = 0; - } + if (!gpiochip_add(&s->gpio)) + s->gpio_used = 1; } else dev_info(dev, "GPIO support not enabled\n"); #endif - /* Go to suspend mode */ - if (pdata->suspend) - pdata->suspend(1); + /* Setup interrupt */ + ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), s); + if (ret) { + dev_err(dev, "Unable to reguest IRQ %i\n", irq); +#ifdef CONFIG_GPIOLIB + if (s->gpio_used) + WARN_ON(gpiochip_remove(&s->gpio)); +#endif + } - return 0; + return ret; err_freq: dev_err(dev, "Frequency parameter incorrect\n"); - ret = -EINVAL; - -err_out: - dev_set_drvdata(dev, NULL); - - return ret; + return -EINVAL; } -static int max310x_remove(struct spi_device *spi) +static int max310x_remove(struct device *dev) { - struct device *dev = &spi->dev; struct max310x_port *s = dev_get_drvdata(dev); - int ret = 0; - - dev_dbg(dev, "Removing port\n"); - - devm_free_irq(dev, s->port.irq, s); - - destroy_workqueue(s->wq); + int i, ret = 0; - uart_remove_one_port(&s->uart, &s->port); + for (i = 0; i < s->uart.nr; i++) { + cancel_work_sync(&s->p[i].tx_work); + uart_remove_one_port(&s->uart, &s->p[i].port); + s->devtype->power(&s->p[i].port, 0); + } uart_unregister_driver(&s->uart); #ifdef CONFIG_GPIOLIB - if (s->pdata->gpio_base) { + if (s->gpio_used) ret = gpiochip_remove(&s->gpio); - if (ret) - dev_err(dev, "Failed to remove gpio chip: %d\n", ret); - } #endif - dev_set_drvdata(dev, NULL); - - if (s->pdata->suspend) - s->pdata->suspend(1); if (s->pdata->exit) s->pdata->exit(); return ret; } +#ifdef CONFIG_SPI_MASTER +static int max310x_spi_probe(struct spi_device *spi) +{ + struct max310x_devtype *devtype = + (struct max310x_devtype *)spi_get_device_id(spi)->driver_data; + int ret; + + /* Setup SPI bus */ + spi->bits_per_word = 8; + spi->mode = spi->mode ? : SPI_MODE_0; + spi->max_speed_hz = spi->max_speed_hz ? : 26000000; + ret = spi_setup(spi); + if (ret) { + dev_err(&spi->dev, "SPI setup failed\n"); + return ret; + } + + return max310x_probe(&spi->dev, 1, devtype, spi->irq); +} + +static int max310x_spi_remove(struct spi_device *spi) +{ + return max310x_remove(&spi->dev); +} + +static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume); + static const struct spi_device_id max310x_id_table[] = { - { "max3107", MAX310X_TYPE_MAX3107 }, - { "max3108", MAX310X_TYPE_MAX3108 }, + { "max3107", (kernel_ulong_t)&max3107_devtype, }, + { "max3108", (kernel_ulong_t)&max3108_devtype, }, + { "max3109", (kernel_ulong_t)&max3109_devtype, }, + { "max14830", (kernel_ulong_t)&max14830_devtype, }, { } }; MODULE_DEVICE_TABLE(spi, max310x_id_table); -static struct spi_driver max310x_driver = { +static struct spi_driver max310x_uart_driver = { .driver = { - .name = "max310x", + .name = MAX310X_NAME, .owner = THIS_MODULE, - .pm = MAX310X_PM_OPS, + .pm = &max310x_pm_ops, }, - .probe = max310x_probe, - .remove = max310x_remove, + .probe = max310x_spi_probe, + .remove = max310x_spi_remove, .id_table = max310x_id_table, }; -module_spi_driver(max310x_driver); +module_spi_driver(max310x_uart_driver); +#endif -MODULE_LICENSE("GPL v2"); +MODULE_LICENSE("GPL"); MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>"); MODULE_DESCRIPTION("MAX310X serial driver"); diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c index 65be0c00c4bf..a2e97c96e159 100644 --- a/drivers/tty/serial/mcf.c +++ b/drivers/tty/serial/mcf.c @@ -24,6 +24,7 @@ #include <linux/serial_core.h> #include <linux/io.h> #include <linux/uaccess.h> +#include <linux/platform_device.h> #include <asm/coldfire.h> #include <asm/mcfsim.h> #include <asm/mcfuart.h> @@ -644,7 +645,7 @@ static struct uart_driver mcf_driver = { static int mcf_probe(struct platform_device *pdev) { - struct mcf_platform_uart *platp = pdev->dev.platform_data; + struct mcf_platform_uart *platp = dev_get_platdata(&pdev->dev); struct uart_port *port; int i; diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c index bc24f4931670..fba52578d02f 100644 --- a/drivers/tty/serial/mpsc.c +++ b/drivers/tty/serial/mpsc.c @@ -1884,7 +1884,7 @@ static int mpsc_shared_drv_probe(struct platform_device *dev) if (dev->id == 0) { if (!(rc = mpsc_shared_map_regs(dev))) { pdata = (struct mpsc_shared_pdata *) - dev->dev.platform_data; + dev_get_platdata(&dev->dev); mpsc_shared_regs.MPSC_MRR_m = pdata->mrr_val; mpsc_shared_regs.MPSC_RCRR_m= pdata->rcrr_val; @@ -2025,7 +2025,7 @@ static void mpsc_drv_get_platform_data(struct mpsc_port_info *pi, { struct mpsc_pdata *pdata; - pdata = (struct mpsc_pdata *)pd->dev.platform_data; + pdata = (struct mpsc_pdata *)dev_get_platdata(&pd->dev); pi->port.uartclk = pdata->brg_clk_freq; pi->port.iotype = UPIO_MEM; diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index 2c6cfb3cf032..252d514b47fb 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -45,16 +45,19 @@ struct msm_port { struct clk *clk; struct clk *pclk; unsigned int imr; - unsigned int *gsbi_base; + void __iomem *gsbi_base; int is_uartdm; unsigned int old_snap_state; }; -static inline void wait_for_xmitr(struct uart_port *port, int bits) +static inline void wait_for_xmitr(struct uart_port *port) { - if (!(msm_read(port, UART_SR) & UART_SR_TX_EMPTY)) - while ((msm_read(port, UART_ISR) & bits) != bits) - cpu_relax(); + while (!(msm_read(port, UART_SR) & UART_SR_TX_EMPTY)) { + if (msm_read(port, UART_ISR) & UART_ISR_TX_READY) + break; + udelay(1); + } + msm_write(port, UART_CR_CMD_RESET_TX_READY, UART_CR); } static void msm_stop_tx(struct uart_port *port) @@ -192,49 +195,63 @@ static void handle_rx(struct uart_port *port) tty_flip_buffer_push(tport); } -static void reset_dm_count(struct uart_port *port) +static void reset_dm_count(struct uart_port *port, int count) { - wait_for_xmitr(port, UART_ISR_TX_READY); - msm_write(port, 1, UARTDM_NCF_TX); + wait_for_xmitr(port); + msm_write(port, count, UARTDM_NCF_TX); + msm_read(port, UARTDM_NCF_TX); } static void handle_tx(struct uart_port *port) { struct circ_buf *xmit = &port->state->xmit; struct msm_port *msm_port = UART_TO_MSM(port); - int sent_tx; + unsigned int tx_count, num_chars; + unsigned int tf_pointer = 0; + + tx_count = uart_circ_chars_pending(xmit); + tx_count = min3(tx_count, (unsigned int)UART_XMIT_SIZE - xmit->tail, + port->fifosize); if (port->x_char) { if (msm_port->is_uartdm) - reset_dm_count(port); + reset_dm_count(port, tx_count + 1); msm_write(port, port->x_char, msm_port->is_uartdm ? UARTDM_TF : UART_TF); port->icount.tx++; port->x_char = 0; + } else if (tx_count && msm_port->is_uartdm) { + reset_dm_count(port, tx_count); } - if (msm_port->is_uartdm) - reset_dm_count(port); + while (tf_pointer < tx_count) { + int i; + char buf[4] = { 0 }; + unsigned int *bf = (unsigned int *)&buf; - while (msm_read(port, UART_SR) & UART_SR_TX_READY) { - if (uart_circ_empty(xmit)) { - /* disable tx interrupts */ - msm_port->imr &= ~UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); + if (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) break; - } - msm_write(port, xmit->buf[xmit->tail], - msm_port->is_uartdm ? UARTDM_TF : UART_TF); if (msm_port->is_uartdm) - reset_dm_count(port); + num_chars = min(tx_count - tf_pointer, sizeof(buf)); + else + num_chars = 1; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - sent_tx = 1; + for (i = 0; i < num_chars; i++) { + buf[i] = xmit->buf[xmit->tail + i]; + port->icount.tx++; + } + + msm_write(port, *bf, msm_port->is_uartdm ? UARTDM_TF : UART_TF); + xmit->tail = (xmit->tail + num_chars) & (UART_XMIT_SIZE - 1); + tf_pointer += num_chars; } + /* disable tx interrupts if nothing more to send */ + if (uart_circ_empty(xmit)) + msm_stop_tx(port); + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); } @@ -295,7 +312,7 @@ static void msm_reset(struct uart_port *port) msm_write(port, UART_CR_CMD_SET_RFR, UART_CR); } -void msm_set_mctrl(struct uart_port *port, unsigned int mctrl) +static void msm_set_mctrl(struct uart_port *port, unsigned int mctrl) { unsigned int mr; mr = msm_read(port, UART_MR1); @@ -318,70 +335,60 @@ static void msm_break_ctl(struct uart_port *port, int break_ctl) msm_write(port, UART_CR_CMD_STOP_BREAK, UART_CR); } +struct msm_baud_map { + u16 divisor; + u8 code; + u8 rxstale; +}; + +static const struct msm_baud_map * +msm_find_best_baud(struct uart_port *port, unsigned int baud) +{ + unsigned int i, divisor; + const struct msm_baud_map *entry; + static const struct msm_baud_map table[] = { + { 1536, 0x00, 1 }, + { 768, 0x11, 1 }, + { 384, 0x22, 1 }, + { 192, 0x33, 1 }, + { 96, 0x44, 1 }, + { 48, 0x55, 1 }, + { 32, 0x66, 1 }, + { 24, 0x77, 1 }, + { 16, 0x88, 1 }, + { 12, 0x99, 6 }, + { 8, 0xaa, 6 }, + { 6, 0xbb, 6 }, + { 4, 0xcc, 6 }, + { 3, 0xdd, 8 }, + { 2, 0xee, 16 }, + { 1, 0xff, 31 }, + }; + + divisor = uart_get_divisor(port, baud); + + for (i = 0, entry = table; i < ARRAY_SIZE(table); i++, entry++) + if (entry->divisor <= divisor) + break; + + return entry; /* Default to smallest divider */ +} + static int msm_set_baud_rate(struct uart_port *port, unsigned int baud) { - unsigned int baud_code, rxstale, watermark; + unsigned int rxstale, watermark; struct msm_port *msm_port = UART_TO_MSM(port); + const struct msm_baud_map *entry; - switch (baud) { - case 300: - baud_code = UART_CSR_300; - rxstale = 1; - break; - case 600: - baud_code = UART_CSR_600; - rxstale = 1; - break; - case 1200: - baud_code = UART_CSR_1200; - rxstale = 1; - break; - case 2400: - baud_code = UART_CSR_2400; - rxstale = 1; - break; - case 4800: - baud_code = UART_CSR_4800; - rxstale = 1; - break; - case 9600: - baud_code = UART_CSR_9600; - rxstale = 2; - break; - case 14400: - baud_code = UART_CSR_14400; - rxstale = 3; - break; - case 19200: - baud_code = UART_CSR_19200; - rxstale = 4; - break; - case 28800: - baud_code = UART_CSR_28800; - rxstale = 6; - break; - case 38400: - baud_code = UART_CSR_38400; - rxstale = 8; - break; - case 57600: - baud_code = UART_CSR_57600; - rxstale = 16; - break; - case 115200: - default: - baud_code = UART_CSR_115200; - baud = 115200; - rxstale = 31; - break; - } + entry = msm_find_best_baud(port, baud); if (msm_port->is_uartdm) msm_write(port, UART_CR_CMD_RESET_RX, UART_CR); - msm_write(port, baud_code, UART_CSR); + msm_write(port, entry->code, UART_CSR); /* RX stale watermark */ + rxstale = entry->rxstale; watermark = UART_IPR_STALE_LSB & rxstale; watermark |= UART_IPR_RXSTALE_LAST; watermark |= UART_IPR_STALE_TIMEOUT_MSB & (rxstale << 2); @@ -589,12 +596,10 @@ static void msm_release_port(struct uart_port *port) port->membase = NULL; if (msm_port->gsbi_base) { - iowrite32(GSBI_PROTOCOL_IDLE, msm_port->gsbi_base + - GSBI_CONTROL); - - gsbi_resource = platform_get_resource(pdev, - IORESOURCE_MEM, 1); + writel_relaxed(GSBI_PROTOCOL_IDLE, + msm_port->gsbi_base + GSBI_CONTROL); + gsbi_resource = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (unlikely(!gsbi_resource)) return; @@ -637,7 +642,7 @@ static int msm_request_port(struct uart_port *port) if (!request_mem_region(gsbi_resource->start, size, "msm_serial")) { ret = -EBUSY; - goto fail_release_port; + goto fail_release_port_membase; } msm_port->gsbi_base = ioremap(gsbi_resource->start, size); @@ -651,6 +656,8 @@ static int msm_request_port(struct uart_port *port) fail_release_gsbi: release_mem_region(gsbi_resource->start, size); +fail_release_port_membase: + iounmap(port->membase); fail_release_port: release_mem_region(port->mapbase, size); return ret; @@ -666,10 +673,9 @@ static void msm_config_port(struct uart_port *port, int flags) if (ret) return; } - if (msm_port->is_uartdm) - iowrite32(GSBI_PROTOCOL_UART, msm_port->gsbi_base + - GSBI_CONTROL); + writel_relaxed(GSBI_PROTOCOL_UART, + msm_port->gsbi_base + GSBI_CONTROL); } static int msm_verify_port(struct uart_port *port, struct serial_struct *ser) @@ -766,7 +772,7 @@ static void msm_console_putchar(struct uart_port *port, int c) struct msm_port *msm_port = UART_TO_MSM(port); if (msm_port->is_uartdm) - reset_dm_count(port); + reset_dm_count(port, 1); while (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) ; diff --git a/drivers/tty/serial/msm_serial.h b/drivers/tty/serial/msm_serial.h index e4acef5de77e..469fda50ac63 100644 --- a/drivers/tty/serial/msm_serial.h +++ b/drivers/tty/serial/msm_serial.h @@ -38,19 +38,7 @@ #define UART_MR2_PARITY_MODE_SPACE 0x3 #define UART_MR2_PARITY_MODE 0x3 -#define UART_CSR 0x0008 -#define UART_CSR_115200 0xFF -#define UART_CSR_57600 0xEE -#define UART_CSR_38400 0xDD -#define UART_CSR_28800 0xCC -#define UART_CSR_19200 0xBB -#define UART_CSR_14400 0xAA -#define UART_CSR_9600 0x99 -#define UART_CSR_4800 0x77 -#define UART_CSR_2400 0x55 -#define UART_CSR_1200 0x44 -#define UART_CSR_600 0x33 -#define UART_CSR_300 0x22 +#define UART_CSR 0x0008 #define UART_TF 0x000C #define UARTDM_TF 0x0070 @@ -71,6 +59,7 @@ #define UART_CR_CMD_RESET_RFR (14 << 4) #define UART_CR_CMD_PROTECTION_EN (16 << 4) #define UART_CR_CMD_STALE_EVENT_ENABLE (80 << 4) +#define UART_CR_CMD_RESET_TX_READY (3 << 8) #define UART_CR_TX_DISABLE (1 << 3) #define UART_CR_TX_ENABLE (1 << 2) #define UART_CR_RX_DISABLE (1 << 1) @@ -151,6 +140,7 @@ static inline void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) msm_write(port, 0xF1, UART_NREG); msm_write(port, 0x0F, UART_DREG); msm_write(port, 0x1A, UART_MNDREG); + port->uartclk = 1843200; } /* @@ -162,6 +152,7 @@ static inline void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port) msm_write(port, 0xF6, UART_NREG); msm_write(port, 0x0F, UART_DREG); msm_write(port, 0x0A, UART_MNDREG); + port->uartclk = 1843200; } static inline @@ -169,7 +160,7 @@ void msm_serial_set_mnd_regs_from_uartclk(struct uart_port *port) { if (port->uartclk == 19200000) msm_serial_set_mnd_regs_tcxo(port); - else + else if (port->uartclk == 4800000) msm_serial_set_mnd_regs_tcxoby4(port); } diff --git a/drivers/tty/serial/msm_serial_hs.c b/drivers/tty/serial/msm_serial_hs.c index 4ca2f64861e6..48e94961a9e5 100644 --- a/drivers/tty/serial/msm_serial_hs.c +++ b/drivers/tty/serial/msm_serial_hs.c @@ -1618,7 +1618,7 @@ static int msm_hs_probe(struct platform_device *pdev) struct msm_hs_port *msm_uport; struct resource *resource; const struct msm_serial_hs_platform_data *pdata = - pdev->dev.platform_data; + dev_get_platdata(&pdev->dev); if (pdev->id < 0 || pdev->id >= UARTDM_NR) { printk(KERN_ERR "Invalid plaform device ID = %d\n", pdev->id); diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index f85b8e6d0346..736e95c1ac4e 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -32,7 +32,6 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/io.h> -#include <linux/pinctrl/consumer.h> #include <linux/of_device.h> #include <linux/dma-mapping.h> #include <linux/dmaengine.h> @@ -1021,7 +1020,6 @@ static int mxs_auart_probe(struct platform_device *pdev) u32 version; int ret = 0; struct resource *r; - struct pinctrl *pinctrl; s = kzalloc(sizeof(struct mxs_auart_port), GFP_KERNEL); if (!s) { @@ -1035,12 +1033,6 @@ static int mxs_auart_probe(struct platform_device *pdev) else if (ret < 0) goto out_free; - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); - if (IS_ERR(pinctrl)) { - ret = PTR_ERR(pinctrl); - goto out_free; - } - if (of_id) { pdev->id_entry = of_id->data; s->devtype = pdev->id_entry->driver_data; diff --git a/drivers/tty/serial/netx-serial.c b/drivers/tty/serial/netx-serial.c index b9a40ed70be2..ce04f3f8c547 100644 --- a/drivers/tty/serial/netx-serial.c +++ b/drivers/tty/serial/netx-serial.c @@ -693,8 +693,6 @@ static int serial_netx_remove(struct platform_device *pdev) { struct netx_port *sport = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - if (sport) uart_remove_one_port(&netx_reg, &sport->port); diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index b6d172873076..c7517063eb9b 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -40,7 +40,6 @@ #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/gpio.h> -#include <linux/pinctrl/consumer.h> #include <linux/platform_data/serial-omap.h> #define OMAP_MAX_HSUART_PORTS 6 @@ -52,6 +51,11 @@ #define OMAP_UART_REV_52 0x0502 #define OMAP_UART_REV_63 0x0603 +#define OMAP_UART_TX_WAKEUP_EN BIT(7) + +/* Feature flags */ +#define OMAP_UART_WER_HAS_TX_WAKEUP BIT(0) + #define UART_ERRATA_i202_MDR1_ACCESS BIT(0) #define UART_ERRATA_i291_DMA_FORCEIDLE BIT(1) @@ -137,6 +141,7 @@ struct uart_omap_port { unsigned char dlh; unsigned char mdr1; unsigned char scr; + unsigned char wer; int use_dma; /* @@ -151,6 +156,7 @@ struct uart_omap_port { int context_loss_cnt; u32 errata; u8 wakeups_enabled; + u32 features; int DTR_gpio; int DTR_inverted; @@ -160,7 +166,6 @@ struct uart_omap_port { u32 latency; u32 calc_latency; struct work_struct qos_work; - struct pinctrl *pins; bool is_suspending; }; @@ -195,7 +200,7 @@ static inline void serial_omap_clear_fifos(struct uart_omap_port *up) static int serial_omap_get_context_loss_count(struct uart_omap_port *up) { - struct omap_uart_port_info *pdata = up->dev->platform_data; + struct omap_uart_port_info *pdata = dev_get_platdata(up->dev); if (!pdata || !pdata->get_context_loss_count) return -EINVAL; @@ -205,7 +210,7 @@ static int serial_omap_get_context_loss_count(struct uart_omap_port *up) static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable) { - struct omap_uart_port_info *pdata = up->dev->platform_data; + struct omap_uart_port_info *pdata = dev_get_platdata(up->dev); if (!pdata || !pdata->enable_wakeup) return; @@ -310,7 +315,8 @@ static void transmit_chars(struct uart_omap_port *up, unsigned int lsr) serial_omap_stop_tx(&up->port); return; } - count = up->port.fifosize / 4; + count = up->port.fifosize - + (serial_in(up, UART_OMAP_TXFIFO_LVL) & 0xFF); do { serial_out(up, UART_TX, xmit->buf[xmit->tail]); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); @@ -479,7 +485,6 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id) struct uart_omap_port *up = dev_id; unsigned int iir, lsr; unsigned int type; - irqreturn_t ret = IRQ_NONE; int max_count = 256; spin_lock(&up->port.lock); @@ -490,7 +495,6 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id) if (iir & UART_IIR_NO_INT) break; - ret = IRQ_HANDLED; lsr = serial_in(up, UART_LSR); /* extract IRQ type from IIR register */ @@ -529,7 +533,7 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id) pm_runtime_put_autosuspend(up->dev); up->port_activity = jiffies; - return ret; + return IRQ_HANDLED; } static unsigned int serial_omap_tx_empty(struct uart_port *port) @@ -683,7 +687,11 @@ static int serial_omap_startup(struct uart_port *port) serial_out(up, UART_IER, up->ier); /* Enable module level wake up */ - serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP); + up->wer = OMAP_UART_WER_MOD_WKUP; + if (up->features & OMAP_UART_WER_HAS_TX_WAKEUP) + up->wer |= OMAP_UART_TX_WAKEUP_EN; + + serial_out(up, UART_OMAP_WER, up->wer); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); @@ -1334,7 +1342,7 @@ static void omap_serial_fill_features_erratas(struct uart_omap_port *up) u32 mvr, scheme; u16 revision, major, minor; - mvr = serial_in(up, UART_OMAP_MVER); + mvr = readl(up->port.membase + (UART_OMAP_MVER << up->port.regshift)); /* Check revision register scheme */ scheme = mvr >> OMAP_UART_MVR_SCHEME_SHIFT; @@ -1373,9 +1381,11 @@ static void omap_serial_fill_features_erratas(struct uart_omap_port *up) case OMAP_UART_REV_52: up->errata |= (UART_ERRATA_i202_MDR1_ACCESS | UART_ERRATA_i291_DMA_FORCEIDLE); + up->features |= OMAP_UART_WER_HAS_TX_WAKEUP; break; case OMAP_UART_REV_63: up->errata |= UART_ERRATA_i202_MDR1_ACCESS; + up->features |= OMAP_UART_WER_HAS_TX_WAKEUP; break; default: break; @@ -1399,11 +1409,13 @@ static int serial_omap_probe(struct platform_device *pdev) { struct uart_omap_port *up; struct resource *mem, *irq; - struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data; + struct omap_uart_port_info *omap_up_info = dev_get_platdata(&pdev->dev); int ret; - if (pdev->dev.of_node) + if (pdev->dev.of_node) { omap_up_info = of_get_uart_port_info(&pdev->dev); + pdev->dev.platform_data = omap_up_info; + } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { @@ -1468,13 +1480,6 @@ static int serial_omap_probe(struct platform_device *pdev) goto err_port_line; } - up->pins = devm_pinctrl_get_select_default(&pdev->dev); - if (IS_ERR(up->pins)) { - dev_warn(&pdev->dev, "did not get pins for uart%i error: %li\n", - up->port.line, PTR_ERR(up->pins)); - up->pins = NULL; - } - sprintf(up->name, "OMAP UART%d", up->port.line); up->port.mapbase = mem->start; up->port.membase = devm_ioremap(&pdev->dev, mem->start, @@ -1501,7 +1506,6 @@ static int serial_omap_probe(struct platform_device *pdev) INIT_WORK(&up->qos_work, serial_omap_uart_qos_work); platform_set_drvdata(pdev, up); - pm_runtime_enable(&pdev->dev); if (omap_up_info->autosuspend_timeout == 0) omap_up_info->autosuspend_timeout = -1; device_init_wakeup(up->dev, true); @@ -1510,6 +1514,8 @@ static int serial_omap_probe(struct platform_device *pdev) omap_up_info->autosuspend_timeout); pm_runtime_irq_safe(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); omap_serial_fill_features_erratas(up); @@ -1609,6 +1615,7 @@ static void serial_omap_restore_context(struct uart_omap_port *up) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); + serial_out(up, UART_OMAP_WER, up->wer); } static int serial_omap_runtime_suspend(struct device *dev) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 572d48189de9..5040c517f3b8 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -232,7 +232,7 @@ struct eg20t_port { unsigned int iobase; struct pci_dev *pdev; int fifo_size; - int uartclk; + unsigned int uartclk; int start_tx; int start_rx; int tx_empty; @@ -373,35 +373,62 @@ static const struct file_operations port_regs_ops = { }; #endif /* CONFIG_DEBUG_FS */ +static struct dmi_system_id pch_uart_dmi_table[] = { + { + .ident = "CM-iTC", + { + DMI_MATCH(DMI_BOARD_NAME, "CM-iTC"), + }, + (void *)CMITC_UARTCLK, + }, + { + .ident = "FRI2", + { + DMI_MATCH(DMI_BIOS_VERSION, "FRI2"), + }, + (void *)FRI2_64_UARTCLK, + }, + { + .ident = "Fish River Island II", + { + DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"), + }, + (void *)FRI2_48_UARTCLK, + }, + { + .ident = "COMe-mTT", + { + DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"), + }, + (void *)NTC1_UARTCLK, + }, + { + .ident = "nanoETXexpress-TT", + { + DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"), + }, + (void *)NTC1_UARTCLK, + }, + { + .ident = "MinnowBoard", + { + DMI_MATCH(DMI_BOARD_NAME, "MinnowBoard"), + }, + (void *)MINNOW_UARTCLK, + }, +}; + /* Return UART clock, checking for board specific clocks. */ -static int pch_uart_get_uartclk(void) +static unsigned int pch_uart_get_uartclk(void) { - const char *cmp; + const struct dmi_system_id *d; if (user_uartclk) return user_uartclk; - cmp = dmi_get_system_info(DMI_BOARD_NAME); - if (cmp && strstr(cmp, "CM-iTC")) - return CMITC_UARTCLK; - - cmp = dmi_get_system_info(DMI_BIOS_VERSION); - if (cmp && strnstr(cmp, "FRI2", 4)) - return FRI2_64_UARTCLK; - - cmp = dmi_get_system_info(DMI_PRODUCT_NAME); - if (cmp && strstr(cmp, "Fish River Island II")) - return FRI2_48_UARTCLK; - - /* Kontron COMe-mTT10 (nanoETXexpress-TT) */ - cmp = dmi_get_system_info(DMI_BOARD_NAME); - if (cmp && (strstr(cmp, "COMe-mTT") || - strstr(cmp, "nanoETXexpress-TT"))) - return NTC1_UARTCLK; - - cmp = dmi_get_system_info(DMI_BOARD_NAME); - if (cmp && strstr(cmp, "MinnowBoard")) - return MINNOW_UARTCLK; + d = dmi_first_match(pch_uart_dmi_table); + if (d) + return (unsigned long)d->driver_data; return DEFAULT_UARTCLK; } @@ -422,7 +449,7 @@ static void pch_uart_hal_disable_interrupt(struct eg20t_port *priv, iowrite8(ier, priv->membase + UART_IER); } -static int pch_uart_hal_set_line(struct eg20t_port *priv, int baud, +static int pch_uart_hal_set_line(struct eg20t_port *priv, unsigned int baud, unsigned int parity, unsigned int bits, unsigned int stb) { @@ -457,7 +484,7 @@ static int pch_uart_hal_set_line(struct eg20t_port *priv, int baud, lcr |= bits; lcr |= stb; - dev_dbg(priv->port.dev, "%s:baud = %d, div = %04x, lcr = %02x (%lu)\n", + dev_dbg(priv->port.dev, "%s:baud = %u, div = %04x, lcr = %02x (%lu)\n", __func__, baud, div, lcr, jiffies); iowrite8(PCH_UART_LCR_DLAB, priv->membase + UART_LCR); iowrite8(dll, priv->membase + PCH_UART_DLL); @@ -1363,9 +1390,8 @@ static void pch_uart_shutdown(struct uart_port *port) static void pch_uart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - int baud; int rtn; - unsigned int parity, bits, stb; + unsigned int baud, parity, bits, stb; struct eg20t_port *priv; unsigned long flags; diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c index b1785f58b6e3..f87f1a0c8c6e 100644 --- a/drivers/tty/serial/pmac_zilog.c +++ b/drivers/tty/serial/pmac_zilog.c @@ -1798,7 +1798,6 @@ static int __exit pmz_detach(struct platform_device *pdev) uart_remove_one_port(&pmz_uart_reg, &uap->port); - platform_set_drvdata(pdev, NULL); uap->port.dev = NULL; return 0; diff --git a/drivers/tty/serial/pnx8xxx_uart.c b/drivers/tty/serial/pnx8xxx_uart.c index 7e277a5384a7..b6b7aca5707a 100644 --- a/drivers/tty/serial/pnx8xxx_uart.c +++ b/drivers/tty/serial/pnx8xxx_uart.c @@ -801,8 +801,6 @@ static int pnx8xxx_serial_remove(struct platform_device *pdev) { struct pnx8xxx_port *sport = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - if (sport) uart_remove_one_port(&pnx8xxx_reg, &sport->port); diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 05f504e0c271..ac8b2f5b2396 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -945,8 +945,6 @@ static int serial_pxa_remove(struct platform_device *dev) { struct uart_pxa_port *sport = platform_get_drvdata(dev); - platform_set_drvdata(dev, NULL); - uart_remove_one_port(&serial_pxa_reg, &sport->port); clk_unprepare(sport->clk); diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c index af6b3e3ad24d..fc23ea19073a 100644 --- a/drivers/tty/serial/sa1100.c +++ b/drivers/tty/serial/sa1100.c @@ -864,8 +864,6 @@ static int sa1100_serial_remove(struct platform_device *pdev) { struct sa1100_port *sport = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - if (sport) uart_remove_one_port(&sa1100_reg, &sport->port); diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 376079b9bd75..019b9154d7d4 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1250,8 +1250,8 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) ourport->baudclk = ERR_PTR(-EINVAL); ourport->info = ourport->drv_data->info; - ourport->cfg = (pdev->dev.platform_data) ? - (struct s3c2410_uartcfg *)pdev->dev.platform_data : + ourport->cfg = (dev_get_platdata(&pdev->dev)) ? + (struct s3c2410_uartcfg *)dev_get_platdata(&pdev->dev) : ourport->drv_data->def_cfg; ourport->port.fifosize = (ourport->info->fifosize) ? diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c index 4b1434d53e9d..887b4f770749 100644 --- a/drivers/tty/serial/sc26xx.c +++ b/drivers/tty/serial/sc26xx.c @@ -637,7 +637,7 @@ static int sc26xx_probe(struct platform_device *dev) { struct resource *res; struct uart_sc26xx_port *up; - unsigned int *sc26xx_data = dev->dev.platform_data; + unsigned int *sc26xx_data = dev_get_platdata(&dev->dev); int err; res = platform_get_resource(dev, IORESOURCE_MEM, 0); diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index c77304155410..49e9bbfe6cab 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -15,6 +15,7 @@ #define SUPPORT_SYSRQ #endif +#include <linux/clk.h> #include <linux/err.h> #include <linux/module.h> #include <linux/device.h> @@ -94,16 +95,17 @@ #define MCTRL_IBIT(cfg, sig) ((((cfg) >> (sig)) & 0xf) - LINE_IP0) #define MCTRL_OBIT(cfg, sig) ((((cfg) >> (sig)) & 0xf) - LINE_OP0) -/* Supported chip types */ -enum { - SCCNXP_TYPE_SC2681 = 2681, - SCCNXP_TYPE_SC2691 = 2691, - SCCNXP_TYPE_SC2692 = 2692, - SCCNXP_TYPE_SC2891 = 2891, - SCCNXP_TYPE_SC2892 = 2892, - SCCNXP_TYPE_SC28202 = 28202, - SCCNXP_TYPE_SC68681 = 68681, - SCCNXP_TYPE_SC68692 = 68692, +#define SCCNXP_HAVE_IO 0x00000001 +#define SCCNXP_HAVE_MR0 0x00000002 + +struct sccnxp_chip { + const char *name; + unsigned int nr; + unsigned long freq_min; + unsigned long freq_std; + unsigned long freq_max; + unsigned int flags; + unsigned int fifosize; }; struct sccnxp_port { @@ -111,16 +113,10 @@ struct sccnxp_port { struct uart_port port[SCCNXP_MAX_UARTS]; bool opened[SCCNXP_MAX_UARTS]; - const char *name; int irq; - u8 imr; - u8 addr_mask; - int freq_std; - int flags; -#define SCCNXP_HAVE_IO 0x00000001 -#define SCCNXP_HAVE_MR0 0x00000002 + struct sccnxp_chip *chip; #ifdef CONFIG_SERIAL_SCCNXP_CONSOLE struct console console; @@ -136,29 +132,94 @@ struct sccnxp_port { struct regulator *regulator; }; -static inline u8 sccnxp_raw_read(void __iomem *base, u8 reg, u8 shift) -{ - return readb(base + (reg << shift)); -} +static const struct sccnxp_chip sc2681 = { + .name = "SC2681", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; -static inline void sccnxp_raw_write(void __iomem *base, u8 reg, u8 shift, u8 v) -{ - writeb(v, base + (reg << shift)); -} +static const struct sccnxp_chip sc2691 = { + .name = "SC2691", + .nr = 1, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = 0, + .fifosize = 3, +}; + +static const struct sccnxp_chip sc2692 = { + .name = "SC2692", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; + +static const struct sccnxp_chip sc2891 = { + .name = "SC2891", + .nr = 1, + .freq_min = 100000, + .freq_std = 3686400, + .freq_max = 8000000, + .flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0, + .fifosize = 16, +}; + +static const struct sccnxp_chip sc2892 = { + .name = "SC2892", + .nr = 2, + .freq_min = 100000, + .freq_std = 3686400, + .freq_max = 8000000, + .flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0, + .fifosize = 16, +}; + +static const struct sccnxp_chip sc28202 = { + .name = "SC28202", + .nr = 2, + .freq_min = 1000000, + .freq_std = 14745600, + .freq_max = 50000000, + .flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0, + .fifosize = 256, +}; + +static const struct sccnxp_chip sc68681 = { + .name = "SC68681", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; + +static const struct sccnxp_chip sc68692 = { + .name = "SC68692", + .nr = 2, + .freq_min = 1000000, + .freq_std = 3686400, + .freq_max = 4000000, + .flags = SCCNXP_HAVE_IO, + .fifosize = 3, +}; static inline u8 sccnxp_read(struct uart_port *port, u8 reg) { - struct sccnxp_port *s = dev_get_drvdata(port->dev); - - return sccnxp_raw_read(port->membase, reg & s->addr_mask, - port->regshift); + return readb(port->membase + (reg << port->regshift)); } static inline void sccnxp_write(struct uart_port *port, u8 reg, u8 v) { - struct sccnxp_port *s = dev_get_drvdata(port->dev); - - sccnxp_raw_write(port->membase, reg & s->addr_mask, port->regshift, v); + writeb(v, port->membase + (reg << port->regshift)); } static inline u8 sccnxp_port_read(struct uart_port *port, u8 reg) @@ -224,13 +285,14 @@ static int sccnxp_set_baud(struct uart_port *port, int baud) { struct sccnxp_port *s = dev_get_drvdata(port->dev); int div_std, tmp_baud, bestbaud = baud, besterr = -1; + struct sccnxp_chip *chip = s->chip; u8 i, acr = 0, csr = 0, mr0 = 0; /* Find best baud from table */ for (i = 0; baud_std[i].baud && besterr; i++) { - if (baud_std[i].mr0 && !(s->flags & SCCNXP_HAVE_MR0)) + if (baud_std[i].mr0 && !(chip->flags & SCCNXP_HAVE_MR0)) continue; - div_std = DIV_ROUND_CLOSEST(s->freq_std, baud_std[i].baud); + div_std = DIV_ROUND_CLOSEST(chip->freq_std, baud_std[i].baud); tmp_baud = DIV_ROUND_CLOSEST(port->uartclk, div_std); if (!sccnxp_update_best_err(baud, tmp_baud, &besterr)) { acr = baud_std[i].acr; @@ -240,7 +302,7 @@ static int sccnxp_set_baud(struct uart_port *port, int baud) } } - if (s->flags & SCCNXP_HAVE_MR0) { + if (chip->flags & SCCNXP_HAVE_MR0) { /* Enable FIFO, set half level for TX */ mr0 |= MR0_FIFO | MR0_TXLVL; /* Update MR0 */ @@ -363,7 +425,7 @@ static void sccnxp_handle_tx(struct uart_port *port) sccnxp_disable_irq(port, IMR_TXRDY); /* Set direction to input */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(port, DIR_OP, 0); } return; @@ -437,7 +499,7 @@ static void sccnxp_start_tx(struct uart_port *port) spin_lock_irqsave(&s->lock, flags); /* Set direction to output */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(port, DIR_OP, 1); sccnxp_enable_irq(port, IMR_TXRDY); @@ -483,7 +545,7 @@ static void sccnxp_set_mctrl(struct uart_port *port, unsigned int mctrl) struct sccnxp_port *s = dev_get_drvdata(port->dev); unsigned long flags; - if (!(s->flags & SCCNXP_HAVE_IO)) + if (!(s->chip->flags & SCCNXP_HAVE_IO)) return; spin_lock_irqsave(&s->lock, flags); @@ -501,7 +563,7 @@ static unsigned int sccnxp_get_mctrl(struct uart_port *port) struct sccnxp_port *s = dev_get_drvdata(port->dev); unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; - if (!(s->flags & SCCNXP_HAVE_IO)) + if (!(s->chip->flags & SCCNXP_HAVE_IO)) return mctrl; spin_lock_irqsave(&s->lock, flags); @@ -617,7 +679,7 @@ static void sccnxp_set_termios(struct uart_port *port, /* Setup baudrate */ baud = uart_get_baud_rate(port, termios, old, 50, - (s->flags & SCCNXP_HAVE_MR0) ? + (s->chip->flags & SCCNXP_HAVE_MR0) ? 230400 : 38400); baud = sccnxp_set_baud(port, baud); @@ -641,7 +703,7 @@ static int sccnxp_startup(struct uart_port *port) spin_lock_irqsave(&s->lock, flags); - if (s->flags & SCCNXP_HAVE_IO) { + if (s->chip->flags & SCCNXP_HAVE_IO) { /* Outputs are controlled manually */ sccnxp_write(port, SCCNXP_OPCR_REG, 0); } @@ -681,7 +743,7 @@ static void sccnxp_shutdown(struct uart_port *port) sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_DISABLE | CR_TX_DISABLE); /* Leave direction to input */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(port, DIR_OP, 0); spin_unlock_irqrestore(&s->lock, flags); @@ -691,7 +753,7 @@ static const char *sccnxp_type(struct uart_port *port) { struct sccnxp_port *s = dev_get_drvdata(port->dev); - return (port->type == PORT_SC26XX) ? s->name : NULL; + return (port->type == PORT_SC26XX) ? s->chip->name : NULL; } static void sccnxp_release_port(struct uart_port *port) @@ -778,19 +840,31 @@ static int sccnxp_console_setup(struct console *co, char *options) } #endif +static const struct platform_device_id sccnxp_id_table[] = { + { .name = "sc2681", .driver_data = (kernel_ulong_t)&sc2681, }, + { .name = "sc2691", .driver_data = (kernel_ulong_t)&sc2691, }, + { .name = "sc2692", .driver_data = (kernel_ulong_t)&sc2692, }, + { .name = "sc2891", .driver_data = (kernel_ulong_t)&sc2891, }, + { .name = "sc2892", .driver_data = (kernel_ulong_t)&sc2892, }, + { .name = "sc28202", .driver_data = (kernel_ulong_t)&sc28202, }, + { .name = "sc68681", .driver_data = (kernel_ulong_t)&sc68681, }, + { .name = "sc68692", .driver_data = (kernel_ulong_t)&sc68692, }, + { } +}; +MODULE_DEVICE_TABLE(platform, sccnxp_id_table); + static int sccnxp_probe(struct platform_device *pdev) { struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - int chiptype = pdev->id_entry->driver_data; struct sccnxp_pdata *pdata = dev_get_platdata(&pdev->dev); - int i, ret, fifosize, freq_min, freq_max; + int i, ret, uartclk; struct sccnxp_port *s; void __iomem *membase; + struct clk *clk; - if (!res) { - dev_err(&pdev->dev, "Missing memory resource data\n"); - return -EADDRNOTAVAIL; - } + membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(membase)) + return PTR_ERR(membase); s = devm_kzalloc(&pdev->dev, sizeof(struct sccnxp_port), GFP_KERNEL); if (!s) { @@ -801,99 +875,38 @@ static int sccnxp_probe(struct platform_device *pdev) spin_lock_init(&s->lock); - /* Individual chip settings */ - switch (chiptype) { - case SCCNXP_TYPE_SC2681: - s->name = "SC2681"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC2691: - s->name = "SC2691"; - s->uart.nr = 1; - s->freq_std = 3686400; - s->addr_mask = 0x07; - s->flags = 0; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC2692: - s->name = "SC2692"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC2891: - s->name = "SC2891"; - s->uart.nr = 1; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; - fifosize = 16; - freq_min = 100000; - freq_max = 8000000; - break; - case SCCNXP_TYPE_SC2892: - s->name = "SC2892"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; - fifosize = 16; - freq_min = 100000; - freq_max = 8000000; - break; - case SCCNXP_TYPE_SC28202: - s->name = "SC28202"; - s->uart.nr = 2; - s->freq_std = 14745600; - s->addr_mask = 0x7f; - s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; - fifosize = 256; - freq_min = 1000000; - freq_max = 50000000; - break; - case SCCNXP_TYPE_SC68681: - s->name = "SC68681"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - case SCCNXP_TYPE_SC68692: - s->name = "SC68692"; - s->uart.nr = 2; - s->freq_std = 3686400; - s->addr_mask = 0x0f; - s->flags = SCCNXP_HAVE_IO; - fifosize = 3; - freq_min = 1000000; - freq_max = 4000000; - break; - default: - dev_err(&pdev->dev, "Unsupported chip type %i\n", chiptype); - ret = -ENOTSUPP; + s->chip = (struct sccnxp_chip *)pdev->id_entry->driver_data; + + s->regulator = devm_regulator_get(&pdev->dev, "vcc"); + if (!IS_ERR(s->regulator)) { + ret = regulator_enable(s->regulator); + if (ret) { + dev_err(&pdev->dev, + "Failed to enable regulator: %i\n", ret); + return ret; + } + } else if (PTR_ERR(s->regulator) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + if (PTR_ERR(clk) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto err_out; + } + dev_notice(&pdev->dev, "Using default clock frequency\n"); + uartclk = s->chip->freq_std; + } else + uartclk = clk_get_rate(clk); + + /* Check input frequency */ + if ((uartclk < s->chip->freq_min) || (uartclk > s->chip->freq_max)) { + dev_err(&pdev->dev, "Frequency out of bounds\n"); + ret = -EINVAL; goto err_out; } - if (!pdata) { - dev_warn(&pdev->dev, - "No platform data supplied, using defaults\n"); - s->pdata.frequency = s->freq_std; - } else + if (pdata) memcpy(&s->pdata, pdata, sizeof(struct sccnxp_pdata)); if (s->pdata.poll_time_us) { @@ -911,34 +924,11 @@ static int sccnxp_probe(struct platform_device *pdev) } } - /* Check input frequency */ - if ((s->pdata.frequency < freq_min) || - (s->pdata.frequency > freq_max)) { - dev_err(&pdev->dev, "Frequency out of bounds\n"); - ret = -EINVAL; - goto err_out; - } - - s->regulator = devm_regulator_get(&pdev->dev, "VCC"); - if (!IS_ERR(s->regulator)) { - ret = regulator_enable(s->regulator); - if (ret) { - dev_err(&pdev->dev, - "Failed to enable regulator: %i\n", ret); - return ret; - } - } - - membase = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(membase)) { - ret = PTR_ERR(membase); - goto err_out; - } - s->uart.owner = THIS_MODULE; s->uart.dev_name = "ttySC"; s->uart.major = SCCNXP_MAJOR; s->uart.minor = SCCNXP_MINOR; + s->uart.nr = s->chip->nr; #ifdef CONFIG_SERIAL_SCCNXP_CONSOLE s->uart.cons = &s->console; s->uart.cons->device = uart_console_device; @@ -960,17 +950,17 @@ static int sccnxp_probe(struct platform_device *pdev) s->port[i].dev = &pdev->dev; s->port[i].irq = s->irq; s->port[i].type = PORT_SC26XX; - s->port[i].fifosize = fifosize; + s->port[i].fifosize = s->chip->fifosize; s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; s->port[i].iotype = UPIO_MEM; s->port[i].mapbase = res->start; s->port[i].membase = membase; s->port[i].regshift = s->pdata.reg_shift; - s->port[i].uartclk = s->pdata.frequency; + s->port[i].uartclk = uartclk; s->port[i].ops = &sccnxp_ops; uart_add_one_port(&s->uart, &s->port[i]); /* Set direction to input */ - if (s->flags & SCCNXP_HAVE_IO) + if (s->chip->flags & SCCNXP_HAVE_IO) sccnxp_set_bit(&s->port[i], DIR_OP, 0); } @@ -997,7 +987,8 @@ static int sccnxp_probe(struct platform_device *pdev) } err_out: - platform_set_drvdata(pdev, NULL); + if (!IS_ERR(s->regulator)) + return regulator_disable(s->regulator); return ret; } @@ -1016,7 +1007,6 @@ static int sccnxp_remove(struct platform_device *pdev) uart_remove_one_port(&s->uart, &s->port[i]); uart_unregister_driver(&s->uart); - platform_set_drvdata(pdev, NULL); if (!IS_ERR(s->regulator)) return regulator_disable(s->regulator); @@ -1024,19 +1014,6 @@ static int sccnxp_remove(struct platform_device *pdev) return 0; } -static const struct platform_device_id sccnxp_id_table[] = { - { "sc2681", SCCNXP_TYPE_SC2681 }, - { "sc2691", SCCNXP_TYPE_SC2691 }, - { "sc2692", SCCNXP_TYPE_SC2692 }, - { "sc2891", SCCNXP_TYPE_SC2891 }, - { "sc2892", SCCNXP_TYPE_SC2892 }, - { "sc28202", SCCNXP_TYPE_SC28202 }, - { "sc68681", SCCNXP_TYPE_SC68681 }, - { "sc68692", SCCNXP_TYPE_SC68692 }, - { }, -}; -MODULE_DEVICE_TABLE(platform, sccnxp_id_table); - static struct platform_driver sccnxp_uart_driver = { .driver = { .name = SCCNXP_NAME, diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 28cdd2829139..0f02351c9239 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2095,12 +2095,12 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port) break; } - printk(KERN_INFO "%s%s%s%d at %s (irq = %d) is a %s\n", + printk(KERN_INFO "%s%s%s%d at %s (irq = %d, base_baud = %d) is a %s\n", port->dev ? dev_name(port->dev) : "", port->dev ? ": " : "", drv->dev_name, drv->tty_driver->name_base + port->line, - address, port->irq, uart_type(port)); + address, port->irq, port->uartclk / 16, uart_type(port)); } static void diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index fe48a0c2b4ca..440a962412da 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -1097,7 +1097,7 @@ static void serial_txx9_unregister_port(int line) */ static int serial_txx9_probe(struct platform_device *dev) { - struct uart_port *p = dev->dev.platform_data; + struct uart_port *p = dev_get_platdata(&dev->dev); struct uart_port port; int ret, i; diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 7477e0ea5cdb..537750261aaa 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2380,7 +2380,7 @@ static char early_serial_buf[32]; static int sci_probe_earlyprintk(struct platform_device *pdev) { - struct plat_sci_port *cfg = pdev->dev.platform_data; + struct plat_sci_port *cfg = dev_get_platdata(&pdev->dev); if (early_serial_console.data) return -EEXIST; @@ -2469,7 +2469,7 @@ static int sci_probe_single(struct platform_device *dev, static int sci_probe(struct platform_device *dev) { - struct plat_sci_port *p = dev->dev.platform_data; + struct plat_sci_port *p = dev_get_platdata(&dev->dev); struct sci_port *sp = &sci_ports[dev->id]; int ret; diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 1fd564b8194b..67a0d1b8341c 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -717,7 +717,6 @@ port_err: clk_disable_unprepare(sirfport->clk); clk_put(sirfport->clk); clk_err: - platform_set_drvdata(pdev, NULL); if (sirfport->hw_flow_ctrl) pinctrl_put(sirfport->p); err: @@ -728,7 +727,7 @@ static int sirfsoc_uart_remove(struct platform_device *pdev) { struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev); struct uart_port *port = &sirfport->port; - platform_set_drvdata(pdev, NULL); + if (sirfport->hw_flow_ctrl) pinctrl_put(sirfport->p); clk_disable_unprepare(sirfport->clk); diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c new file mode 100644 index 000000000000..2ff4b1bb922d --- /dev/null +++ b/drivers/tty/serial/st-asc.c @@ -0,0 +1,939 @@ +/* + * st-asc.c: ST Asynchronous serial controller (ASC) driver + * + * Copyright (C) 2003-2013 STMicroelectronics (R&D) Limited + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#if defined(CONFIG_SERIAL_ST_ASC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include <linux/module.h> +#include <linux/serial.h> +#include <linux/console.h> +#include <linux/sysrq.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/serial_core.h> +#include <linux/clk.h> + +#define DRIVER_NAME "st-asc" +#define ASC_SERIAL_NAME "ttyAS" +#define ASC_FIFO_SIZE 16 +#define ASC_MAX_PORTS 8 + +struct asc_port { + struct uart_port port; + struct clk *clk; + unsigned int hw_flow_control:1; + unsigned int force_m1:1; +}; + +static struct asc_port asc_ports[ASC_MAX_PORTS]; +static struct uart_driver asc_uart_driver; + +/*---- UART Register definitions ------------------------------*/ + +/* Register offsets */ + +#define ASC_BAUDRATE 0x00 +#define ASC_TXBUF 0x04 +#define ASC_RXBUF 0x08 +#define ASC_CTL 0x0C +#define ASC_INTEN 0x10 +#define ASC_STA 0x14 +#define ASC_GUARDTIME 0x18 +#define ASC_TIMEOUT 0x1C +#define ASC_TXRESET 0x20 +#define ASC_RXRESET 0x24 +#define ASC_RETRIES 0x28 + +/* ASC_RXBUF */ +#define ASC_RXBUF_PE 0x100 +#define ASC_RXBUF_FE 0x200 +/** + * Some of status comes from higher bits of the character and some come from + * the status register. Combining both of them in to single status using dummy + * bits. + */ +#define ASC_RXBUF_DUMMY_RX 0x10000 +#define ASC_RXBUF_DUMMY_BE 0x20000 +#define ASC_RXBUF_DUMMY_OE 0x40000 + +/* ASC_CTL */ + +#define ASC_CTL_MODE_MSK 0x0007 +#define ASC_CTL_MODE_8BIT 0x0001 +#define ASC_CTL_MODE_7BIT_PAR 0x0003 +#define ASC_CTL_MODE_9BIT 0x0004 +#define ASC_CTL_MODE_8BIT_WKUP 0x0005 +#define ASC_CTL_MODE_8BIT_PAR 0x0007 +#define ASC_CTL_STOP_MSK 0x0018 +#define ASC_CTL_STOP_HALFBIT 0x0000 +#define ASC_CTL_STOP_1BIT 0x0008 +#define ASC_CTL_STOP_1_HALFBIT 0x0010 +#define ASC_CTL_STOP_2BIT 0x0018 +#define ASC_CTL_PARITYODD 0x0020 +#define ASC_CTL_LOOPBACK 0x0040 +#define ASC_CTL_RUN 0x0080 +#define ASC_CTL_RXENABLE 0x0100 +#define ASC_CTL_SCENABLE 0x0200 +#define ASC_CTL_FIFOENABLE 0x0400 +#define ASC_CTL_CTSENABLE 0x0800 +#define ASC_CTL_BAUDMODE 0x1000 + +/* ASC_GUARDTIME */ + +#define ASC_GUARDTIME_MSK 0x00FF + +/* ASC_INTEN */ + +#define ASC_INTEN_RBE 0x0001 +#define ASC_INTEN_TE 0x0002 +#define ASC_INTEN_THE 0x0004 +#define ASC_INTEN_PE 0x0008 +#define ASC_INTEN_FE 0x0010 +#define ASC_INTEN_OE 0x0020 +#define ASC_INTEN_TNE 0x0040 +#define ASC_INTEN_TOI 0x0080 +#define ASC_INTEN_RHF 0x0100 + +/* ASC_RETRIES */ + +#define ASC_RETRIES_MSK 0x00FF + +/* ASC_RXBUF */ + +#define ASC_RXBUF_MSK 0x03FF + +/* ASC_STA */ + +#define ASC_STA_RBF 0x0001 +#define ASC_STA_TE 0x0002 +#define ASC_STA_THE 0x0004 +#define ASC_STA_PE 0x0008 +#define ASC_STA_FE 0x0010 +#define ASC_STA_OE 0x0020 +#define ASC_STA_TNE 0x0040 +#define ASC_STA_TOI 0x0080 +#define ASC_STA_RHF 0x0100 +#define ASC_STA_TF 0x0200 +#define ASC_STA_NKD 0x0400 + +/* ASC_TIMEOUT */ + +#define ASC_TIMEOUT_MSK 0x00FF + +/* ASC_TXBUF */ + +#define ASC_TXBUF_MSK 0x01FF + +/*---- Inline function definitions ---------------------------*/ + +static inline struct asc_port *to_asc_port(struct uart_port *port) +{ + return container_of(port, struct asc_port, port); +} + +static inline u32 asc_in(struct uart_port *port, u32 offset) +{ + return readl(port->membase + offset); +} + +static inline void asc_out(struct uart_port *port, u32 offset, u32 value) +{ + writel(value, port->membase + offset); +} + +/* + * Some simple utility functions to enable and disable interrupts. + * Note that these need to be called with interrupts disabled. + */ +static inline void asc_disable_tx_interrupts(struct uart_port *port) +{ + u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_THE; + asc_out(port, ASC_INTEN, intenable); + (void)asc_in(port, ASC_INTEN); /* Defeat bus write posting */ +} + +static inline void asc_enable_tx_interrupts(struct uart_port *port) +{ + u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_THE; + asc_out(port, ASC_INTEN, intenable); +} + +static inline void asc_disable_rx_interrupts(struct uart_port *port) +{ + u32 intenable = asc_in(port, ASC_INTEN) & ~ASC_INTEN_RBE; + asc_out(port, ASC_INTEN, intenable); + (void)asc_in(port, ASC_INTEN); /* Defeat bus write posting */ +} + +static inline void asc_enable_rx_interrupts(struct uart_port *port) +{ + u32 intenable = asc_in(port, ASC_INTEN) | ASC_INTEN_RBE; + asc_out(port, ASC_INTEN, intenable); +} + +static inline u32 asc_txfifo_is_empty(struct uart_port *port) +{ + return asc_in(port, ASC_STA) & ASC_STA_TE; +} + +static inline int asc_txfifo_is_full(struct uart_port *port) +{ + return asc_in(port, ASC_STA) & ASC_STA_TF; +} + +static inline const char *asc_port_name(struct uart_port *port) +{ + return to_platform_device(port->dev)->name; +} + +/*----------------------------------------------------------------------*/ + +/* + * This section contains code to support the use of the ASC as a + * generic serial port. + */ + +static inline unsigned asc_hw_txroom(struct uart_port *port) +{ + u32 status = asc_in(port, ASC_STA); + + if (status & ASC_STA_THE) + return port->fifosize / 2; + else if (!(status & ASC_STA_TF)) + return 1; + + return 0; +} + +/* + * Start transmitting chars. + * This is called from both interrupt and task level. + * Either way interrupts are disabled. + */ +static void asc_transmit_chars(struct uart_port *port) +{ + struct circ_buf *xmit = &port->state->xmit; + int txroom; + unsigned char c; + + txroom = asc_hw_txroom(port); + + if ((txroom != 0) && port->x_char) { + c = port->x_char; + port->x_char = 0; + asc_out(port, ASC_TXBUF, c); + port->icount.tx++; + txroom = asc_hw_txroom(port); + } + + if (uart_tx_stopped(port)) { + /* + * We should try and stop the hardware here, but I + * don't think the ASC has any way to do that. + */ + asc_disable_tx_interrupts(port); + return; + } + + if (uart_circ_empty(xmit)) { + asc_disable_tx_interrupts(port); + return; + } + + if (txroom == 0) + return; + + do { + c = xmit->buf[xmit->tail]; + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + asc_out(port, ASC_TXBUF, c); + port->icount.tx++; + txroom--; + } while ((txroom > 0) && (!uart_circ_empty(xmit))); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + + if (uart_circ_empty(xmit)) + asc_disable_tx_interrupts(port); +} + +static void asc_receive_chars(struct uart_port *port) +{ + struct tty_port *tport = &port->state->port; + unsigned long status; + unsigned long c = 0; + char flag; + + if (port->irq_wake) + pm_wakeup_event(tport->tty->dev, 0); + + while ((status = asc_in(port, ASC_STA)) & ASC_STA_RBF) { + c = asc_in(port, ASC_RXBUF) | ASC_RXBUF_DUMMY_RX; + flag = TTY_NORMAL; + port->icount.rx++; + + if ((c & (ASC_RXBUF_FE | ASC_RXBUF_PE)) || + status & ASC_STA_OE) { + + if (c & ASC_RXBUF_FE) { + if (c == ASC_RXBUF_FE) { + port->icount.brk++; + if (uart_handle_break(port)) + continue; + c |= ASC_RXBUF_DUMMY_BE; + } else { + port->icount.frame++; + } + } else if (c & ASC_RXBUF_PE) { + port->icount.parity++; + } + /* + * Reading any data from the RX FIFO clears the + * overflow error condition. + */ + if (status & ASC_STA_OE) { + port->icount.overrun++; + c |= ASC_RXBUF_DUMMY_OE; + } + + c &= port->read_status_mask; + + if (c & ASC_RXBUF_DUMMY_BE) + flag = TTY_BREAK; + else if (c & ASC_RXBUF_PE) + flag = TTY_PARITY; + else if (c & ASC_RXBUF_FE) + flag = TTY_FRAME; + } + + if (uart_handle_sysrq_char(port, c)) + continue; + + uart_insert_char(port, c, ASC_RXBUF_DUMMY_OE, c & 0xff, flag); + } + + /* Tell the rest of the system the news. New characters! */ + tty_flip_buffer_push(tport); +} + +static irqreturn_t asc_interrupt(int irq, void *ptr) +{ + struct uart_port *port = ptr; + u32 status; + + spin_lock(&port->lock); + + status = asc_in(port, ASC_STA); + + if (status & ASC_STA_RBF) { + /* Receive FIFO not empty */ + asc_receive_chars(port); + } + + if ((status & ASC_STA_THE) && + (asc_in(port, ASC_INTEN) & ASC_INTEN_THE)) { + /* Transmitter FIFO at least half empty */ + asc_transmit_chars(port); + } + + spin_unlock(&port->lock); + + return IRQ_HANDLED; +} + +/*----------------------------------------------------------------------*/ + +/* + * UART Functions + */ + +static unsigned int asc_tx_empty(struct uart_port *port) +{ + return asc_txfifo_is_empty(port) ? TIOCSER_TEMT : 0; +} + +static void asc_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* + * This routine is used for seting signals of: DTR, DCD, CTS/RTS + * We use ASC's hardware for CTS/RTS, so don't need any for that. + * Some boards have DTR and DCD implemented using PIO pins, + * code to do this should be hooked in here. + */ +} + +static unsigned int asc_get_mctrl(struct uart_port *port) +{ + /* + * This routine is used for geting signals of: DTR, DCD, DSR, RI, + * and CTS/RTS + */ + return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; +} + +/* There are probably characters waiting to be transmitted. */ +static void asc_start_tx(struct uart_port *port) +{ + struct circ_buf *xmit = &port->state->xmit; + + if (!uart_circ_empty(xmit)) + asc_enable_tx_interrupts(port); +} + +/* Transmit stop */ +static void asc_stop_tx(struct uart_port *port) +{ + asc_disable_tx_interrupts(port); +} + +/* Receive stop */ +static void asc_stop_rx(struct uart_port *port) +{ + asc_disable_rx_interrupts(port); +} + +/* Force modem status interrupts on */ +static void asc_enable_ms(struct uart_port *port) +{ + /* Nothing here yet .. */ +} + +/* Handle breaks - ignored by us */ +static void asc_break_ctl(struct uart_port *port, int break_state) +{ + /* Nothing here yet .. */ +} + +/* + * Enable port for reception. + */ +static int asc_startup(struct uart_port *port) +{ + if (request_irq(port->irq, asc_interrupt, IRQF_NO_SUSPEND, + asc_port_name(port), port)) { + dev_err(port->dev, "cannot allocate irq.\n"); + return -ENODEV; + } + + asc_transmit_chars(port); + asc_enable_rx_interrupts(port); + + return 0; +} + +static void asc_shutdown(struct uart_port *port) +{ + asc_disable_tx_interrupts(port); + asc_disable_rx_interrupts(port); + free_irq(port->irq, port); +} + +static void asc_pm(struct uart_port *port, unsigned int state, + unsigned int oldstate) +{ + struct asc_port *ascport = to_asc_port(port); + unsigned long flags = 0; + u32 ctl; + + switch (state) { + case UART_PM_STATE_ON: + clk_prepare_enable(ascport->clk); + break; + case UART_PM_STATE_OFF: + /* + * Disable the ASC baud rate generator, which is as close as + * we can come to turning it off. Note this is not called with + * the port spinlock held. + */ + spin_lock_irqsave(&port->lock, flags); + ctl = asc_in(port, ASC_CTL) & ~ASC_CTL_RUN; + asc_out(port, ASC_CTL, ctl); + spin_unlock_irqrestore(&port->lock, flags); + clk_disable_unprepare(ascport->clk); + break; + } +} + +static void asc_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) +{ + struct asc_port *ascport = to_asc_port(port); + unsigned int baud; + u32 ctrl_val; + tcflag_t cflag; + unsigned long flags; + + /* Update termios to reflect hardware capabilities */ + termios->c_cflag &= ~(CMSPAR | + (ascport->hw_flow_control ? 0 : CRTSCTS)); + + port->uartclk = clk_get_rate(ascport->clk); + + baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); + cflag = termios->c_cflag; + + spin_lock_irqsave(&port->lock, flags); + + /* read control register */ + ctrl_val = asc_in(port, ASC_CTL); + + /* stop serial port and reset value */ + asc_out(port, ASC_CTL, (ctrl_val & ~ASC_CTL_RUN)); + ctrl_val = ASC_CTL_RXENABLE | ASC_CTL_FIFOENABLE; + + /* reset fifo rx & tx */ + asc_out(port, ASC_TXRESET, 1); + asc_out(port, ASC_RXRESET, 1); + + /* set character length */ + if ((cflag & CSIZE) == CS7) { + ctrl_val |= ASC_CTL_MODE_7BIT_PAR; + } else { + ctrl_val |= (cflag & PARENB) ? ASC_CTL_MODE_8BIT_PAR : + ASC_CTL_MODE_8BIT; + } + + /* set stop bit */ + ctrl_val |= (cflag & CSTOPB) ? ASC_CTL_STOP_2BIT : ASC_CTL_STOP_1BIT; + + /* odd parity */ + if (cflag & PARODD) + ctrl_val |= ASC_CTL_PARITYODD; + + /* hardware flow control */ + if ((cflag & CRTSCTS)) + ctrl_val |= ASC_CTL_CTSENABLE; + + if ((baud < 19200) && !ascport->force_m1) { + asc_out(port, ASC_BAUDRATE, (port->uartclk / (16 * baud))); + } else { + /* + * MODE 1: recommended for high bit rates (above 19.2K) + * + * baudrate * 16 * 2^16 + * ASCBaudRate = ------------------------ + * inputclock + * + * However to keep the maths inside 32bits we divide top and + * bottom by 64. The +1 is to avoid a divide by zero if the + * input clock rate is something unexpected. + */ + u32 counter = (baud * 16384) / ((port->uartclk / 64) + 1); + asc_out(port, ASC_BAUDRATE, counter); + ctrl_val |= ASC_CTL_BAUDMODE; + } + + uart_update_timeout(port, cflag, baud); + + ascport->port.read_status_mask = ASC_RXBUF_DUMMY_OE; + if (termios->c_iflag & INPCK) + ascport->port.read_status_mask |= ASC_RXBUF_FE | ASC_RXBUF_PE; + if (termios->c_iflag & (BRKINT | PARMRK)) + ascport->port.read_status_mask |= ASC_RXBUF_DUMMY_BE; + + /* + * Characters to ignore + */ + ascport->port.ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + ascport->port.ignore_status_mask |= ASC_RXBUF_FE | ASC_RXBUF_PE; + if (termios->c_iflag & IGNBRK) { + ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_BE; + /* + * If we're ignoring parity and break indicators, + * ignore overruns too (for real raw support). + */ + if (termios->c_iflag & IGNPAR) + ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_OE; + } + + /* + * Ignore all characters if CREAD is not set. + */ + if (!(termios->c_cflag & CREAD)) + ascport->port.ignore_status_mask |= ASC_RXBUF_DUMMY_RX; + + /* Set the timeout */ + asc_out(port, ASC_TIMEOUT, 20); + + /* write final value and enable port */ + asc_out(port, ASC_CTL, (ctrl_val | ASC_CTL_RUN)); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static const char *asc_type(struct uart_port *port) +{ + return (port->type == PORT_ASC) ? DRIVER_NAME : NULL; +} + +static void asc_release_port(struct uart_port *port) +{ +} + +static int asc_request_port(struct uart_port *port) +{ + return 0; +} + +/* + * Called when the port is opened, and UPF_BOOT_AUTOCONF flag is set + * Set type field if successful + */ +static void asc_config_port(struct uart_port *port, int flags) +{ + if ((flags & UART_CONFIG_TYPE)) + port->type = PORT_ASC; +} + +static int +asc_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + /* No user changeable parameters */ + return -EINVAL; +} + +#ifdef CONFIG_CONSOLE_POLL +/* + * Console polling routines for writing and reading from the uart while + * in an interrupt or debug context (i.e. kgdb). + */ + +static int asc_get_poll_char(struct uart_port *port) +{ + if (!(asc_in(port, ASC_STA) & ASC_STA_RBF)) + return NO_POLL_CHAR; + + return asc_in(port, ASC_RXBUF); +} + +static void asc_put_poll_char(struct uart_port *port, unsigned char c) +{ + while (asc_txfifo_is_full(port)) + cpu_relax(); + asc_out(port, ASC_TXBUF, c); +} + +#endif /* CONFIG_CONSOLE_POLL */ + +/*---------------------------------------------------------------------*/ + +static struct uart_ops asc_uart_ops = { + .tx_empty = asc_tx_empty, + .set_mctrl = asc_set_mctrl, + .get_mctrl = asc_get_mctrl, + .start_tx = asc_start_tx, + .stop_tx = asc_stop_tx, + .stop_rx = asc_stop_rx, + .enable_ms = asc_enable_ms, + .break_ctl = asc_break_ctl, + .startup = asc_startup, + .shutdown = asc_shutdown, + .set_termios = asc_set_termios, + .type = asc_type, + .release_port = asc_release_port, + .request_port = asc_request_port, + .config_port = asc_config_port, + .verify_port = asc_verify_port, + .pm = asc_pm, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = asc_get_poll_char, + .poll_put_char = asc_put_poll_char, +#endif /* CONFIG_CONSOLE_POLL */ +}; + +static int asc_init_port(struct asc_port *ascport, + struct platform_device *pdev) +{ + struct uart_port *port = &ascport->port; + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + if (!res) { + dev_err(&pdev->dev, "Unable to get io resource\n"); + return -ENODEV; + } + + port->iotype = UPIO_MEM; + port->flags = UPF_BOOT_AUTOCONF; + port->ops = &asc_uart_ops; + port->fifosize = ASC_FIFO_SIZE; + port->dev = &pdev->dev; + port->mapbase = res->start; + port->irq = platform_get_irq(pdev, 0); + + port->membase = devm_request_and_ioremap(&pdev->dev, res); + if (!port->membase) { + dev_err(&pdev->dev, "Unable to request io memory\n"); + return -ENODEV; + } + + spin_lock_init(&port->lock); + + ascport->clk = devm_clk_get(&pdev->dev, NULL); + + if (WARN_ON(IS_ERR(ascport->clk))) + return -EINVAL; + /* ensure that clk rate is correct by enabling the clk */ + clk_prepare_enable(ascport->clk); + ascport->port.uartclk = clk_get_rate(ascport->clk); + WARN_ON(ascport->port.uartclk == 0); + clk_disable_unprepare(ascport->clk); + + return 0; +} + +static struct asc_port *asc_of_get_asc_port(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + int id; + + if (!np) + return NULL; + + id = of_alias_get_id(np, ASC_SERIAL_NAME); + + if (id < 0) + id = 0; + + if (WARN_ON(id >= ASC_MAX_PORTS)) + return NULL; + + asc_ports[id].hw_flow_control = of_property_read_bool(np, + "st,hw-flow-control"); + asc_ports[id].force_m1 = of_property_read_bool(np, "st,force_m1"); + asc_ports[id].port.line = id; + return &asc_ports[id]; +} + +#ifdef CONFIG_OF +static struct of_device_id asc_match[] = { + { .compatible = "st,asc", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, asc_match); +#endif + +static int asc_serial_probe(struct platform_device *pdev) +{ + int ret; + struct asc_port *ascport; + + ascport = asc_of_get_asc_port(pdev); + if (!ascport) + return -ENODEV; + + ret = asc_init_port(ascport, pdev); + if (ret) + return ret; + + ret = uart_add_one_port(&asc_uart_driver, &ascport->port); + if (ret) + return ret; + + platform_set_drvdata(pdev, &ascport->port); + + return 0; +} + +static int asc_serial_remove(struct platform_device *pdev) +{ + struct uart_port *port = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + return uart_remove_one_port(&asc_uart_driver, port); +} + +#ifdef CONFIG_PM_SLEEP +static int asc_serial_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct uart_port *port = platform_get_drvdata(pdev); + + return uart_suspend_port(&asc_uart_driver, port); +} + +static int asc_serial_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct uart_port *port = platform_get_drvdata(pdev); + + return uart_resume_port(&asc_uart_driver, port); +} + +#endif /* CONFIG_PM_SLEEP */ + +/*----------------------------------------------------------------------*/ + +#ifdef CONFIG_SERIAL_ST_ASC_CONSOLE +static void asc_console_putchar(struct uart_port *port, int ch) +{ + unsigned int timeout = 1000000; + + /* Wait for upto 1 second in case flow control is stopping us. */ + while (--timeout && asc_txfifo_is_full(port)) + udelay(1); + + asc_out(port, ASC_TXBUF, ch); +} + +/* + * Print a string to the serial port trying not to disturb + * any possible real use of the port... + */ + +static void asc_console_write(struct console *co, const char *s, unsigned count) +{ + struct uart_port *port = &asc_ports[co->index].port; + unsigned long flags; + unsigned long timeout = 1000000; + int locked = 1; + u32 intenable; + + local_irq_save(flags); + if (port->sysrq) + locked = 0; /* asc_interrupt has already claimed the lock */ + else if (oops_in_progress) + locked = spin_trylock(&port->lock); + else + spin_lock(&port->lock); + + /* + * Disable interrupts so we don't get the IRQ line bouncing + * up and down while interrupts are disabled. + */ + intenable = asc_in(port, ASC_INTEN); + asc_out(port, ASC_INTEN, 0); + (void)asc_in(port, ASC_INTEN); /* Defeat bus write posting */ + + uart_console_write(port, s, count, asc_console_putchar); + + while (--timeout && !asc_txfifo_is_empty(port)) + udelay(1); + + asc_out(port, ASC_INTEN, intenable); + + if (locked) + spin_unlock(&port->lock); + local_irq_restore(flags); +} + +static int asc_console_setup(struct console *co, char *options) +{ + struct asc_port *ascport; + int baud = 9600; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + if (co->index >= ASC_MAX_PORTS) + return -ENODEV; + + ascport = &asc_ports[co->index]; + + /* + * This driver does not support early console initialization + * (use ARM early printk support instead), so we only expect + * this to be called during the uart port registration when the + * driver gets probed and the port should be mapped at that point. + */ + BUG_ON(ascport->port.mapbase == 0 || ascport->port.membase == NULL); + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(&ascport->port, co, baud, parity, bits, flow); +} + +static struct console asc_console = { + .name = ASC_SERIAL_NAME, + .device = uart_console_device, + .write = asc_console_write, + .setup = asc_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &asc_uart_driver, +}; + +#define ASC_SERIAL_CONSOLE (&asc_console) + +#else +#define ASC_SERIAL_CONSOLE NULL +#endif /* CONFIG_SERIAL_ST_ASC_CONSOLE */ + +static struct uart_driver asc_uart_driver = { + .owner = THIS_MODULE, + .driver_name = DRIVER_NAME, + .dev_name = ASC_SERIAL_NAME, + .major = 0, + .minor = 0, + .nr = ASC_MAX_PORTS, + .cons = ASC_SERIAL_CONSOLE, +}; + +static const struct dev_pm_ops asc_serial_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(asc_serial_suspend, asc_serial_resume) +}; + +static struct platform_driver asc_serial_driver = { + .probe = asc_serial_probe, + .remove = asc_serial_remove, + .driver = { + .name = DRIVER_NAME, + .pm = &asc_serial_pm_ops, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(asc_match), + }, +}; + +static int __init asc_init(void) +{ + int ret; + static char banner[] __initdata = + KERN_INFO "STMicroelectronics ASC driver initialized\n"; + + printk(banner); + + ret = uart_register_driver(&asc_uart_driver); + if (ret) + return ret; + + ret = platform_driver_register(&asc_serial_driver); + if (ret) + uart_unregister_driver(&asc_uart_driver); + + return ret; +} + +static void __exit asc_exit(void) +{ + platform_driver_unregister(&asc_serial_driver); + uart_unregister_driver(&asc_uart_driver); +} + +module_init(asc_init); +module_exit(asc_exit); + +MODULE_ALIAS("platform:" DRIVER_NAME); +MODULE_AUTHOR("STMicroelectronics (R&D) Limited"); +MODULE_DESCRIPTION("STMicroelectronics ASC serial port driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c index f655997f44af..a63c14bc9a24 100644 --- a/drivers/tty/serial/vr41xx_siu.c +++ b/drivers/tty/serial/vr41xx_siu.c @@ -705,7 +705,7 @@ static int siu_init_ports(struct platform_device *pdev) { struct uart_port *port; struct resource *res; - int *type = pdev->dev.platform_data; + int *type = dev_get_platdata(&pdev->dev); int i; if (!type) diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c index 48af43de3467..a90bf0440b4f 100644 --- a/drivers/tty/serial/vt8500_serial.c +++ b/drivers/tty/serial/vt8500_serial.c @@ -630,7 +630,6 @@ static int vt8500_serial_remove(struct platform_device *pdev) { struct vt8500_port *vt8500_port = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); clk_disable_unprepare(vt8500_port->clk); uart_remove_one_port(&vt8500_uart_driver, &vt8500_port->uart); 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