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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* (C) Copyright 2000 - 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
* changes based on the file arch/ppc/mbxboot/m8260_tty.c from the
* Linux/PPC sources (m8260_tty.c had no copyright info in it).
*
* Martin Krause, 8 Jun 2006
* Added CONFIG_SERIAL_MULTI support
*/
/*
* Minimal serial functions needed to use one of the PSC ports
* as serial console interface.
*/
#include <common.h>
#include <mach/mpc5xxx.h>
#include <driver.h>
#include <init.h>
#include <console.h>
#include <xfuncs.h>
#include <mach/clock.h>
#include <linux/err.h>
static int __mpc5xxx_serial_setbaudrate(struct mpc5xxx_psc *psc, int baudrate)
{
unsigned long baseclk;
int div;
#if defined(CONFIG_MGT5100)
baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
#elif defined(CONFIG_MPC5200)
baseclk = (get_ipb_clock() + 16) / 32;
#endif
/* set up UART divisor */
div = (baseclk + (baudrate/2)) / baudrate;
psc->ctur = (div >> 8) & 0xFF;
psc->ctlr = div & 0xff;
return 0;
}
static int mpc5xxx_serial_setbaudrate(struct console_device *cdev, int baudrate)
{
struct device_d *dev = cdev->dev;
struct mpc5xxx_psc *psc = dev->priv;
__mpc5xxx_serial_setbaudrate(psc, baudrate);
return 0;
}
static int __mpc5xxx_serial_init(struct mpc5xxx_psc *psc)
{
/* reset PSC */
psc->command = PSC_SEL_MODE_REG_1;
/* select clock sources */
#if defined(CONFIG_MGT5100)
psc->psc_clock_select = 0xdd00;
#elif defined(CONFIG_MPC5200)
psc->psc_clock_select = 0;
#endif
/* switch to UART mode */
psc->sicr = 0;
/* configure parity, bit length and so on */
#if defined(CONFIG_MGT5100)
psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE;
#elif defined(CONFIG_MPC5200)
psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
#endif
psc->mode = PSC_MODE_ONE_STOP;
/* disable all interrupts */
psc->psc_imr = 0;
/* reset and enable Rx/Tx */
// psc->command = PSC_RST_RX;
// psc->command = PSC_RST_TX;
psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;
return 0;
}
static int mpc5xxx_serial_init(struct console_device *cdev)
{
struct device_d *dev = cdev->dev;
struct mpc5xxx_psc *psc = dev->priv;
__mpc5xxx_serial_init(psc);
return 0;
}
static void mpc5xxx_serial_putc (struct console_device *cdev, const char c)
{
struct device_d *dev = cdev->dev;
struct mpc5xxx_psc *psc = dev->priv;
/* Wait for last character to go. */
while (!(psc->psc_status & PSC_SR_TXEMP))
;
psc->psc_buffer_8 = c;
}
static int mpc5xxx_serial_getc (struct console_device *cdev)
{
struct device_d *dev = cdev->dev;
struct mpc5xxx_psc *psc = dev->priv;
/* Wait for a character to arrive. */
while (!(psc->psc_status & PSC_SR_RXRDY))
;
return psc->psc_buffer_8;
}
static int mpc5xxx_serial_tstc (struct console_device *cdev)
{
struct device_d *dev = cdev->dev;
struct mpc5xxx_psc *psc = dev->priv;
return (psc->psc_status & PSC_SR_RXRDY);
}
static int mpc5xxx_serial_probe(struct device_d *dev)
{
struct resource *iores;
struct console_device *cdev;
cdev = xzalloc(sizeof(struct console_device));
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores))
return PTR_ERR(iores);
dev->priv = IOMEM(iores->start);
cdev->dev = dev;
cdev->tstc = mpc5xxx_serial_tstc;
cdev->putc = mpc5xxx_serial_putc;
cdev->getc = mpc5xxx_serial_getc;
cdev->setbrg = mpc5xxx_serial_setbaudrate;
mpc5xxx_serial_init(cdev);
console_register(cdev);
return 0;
}
static struct driver_d mpc5xxx_serial_driver = {
.name = "mpc5xxx_serial",
.probe = mpc5xxx_serial_probe,
};
console_platform_driver(mpc5xxx_serial_driver);
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