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Diffstat (limited to 'board/servo_v4/board.c')
| -rw-r--r-- | board/servo_v4/board.c | 576 |
1 files changed, 0 insertions, 576 deletions
diff --git a/board/servo_v4/board.c b/board/servo_v4/board.c deleted file mode 100644 index 8540de710f..0000000000 --- a/board/servo_v4/board.c +++ /dev/null @@ -1,576 +0,0 @@ -/* Copyright 2016 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ -/* Servo V4 configuration */ - -#include "adc.h" -#include "common.h" -#include "console.h" -#include "ec_version.h" -#include "gpio.h" -#include "hooks.h" -#include "i2c.h" -/* Just want the .h file for PS8742 definitions, not the large object file. */ -#define CONFIG_USB_MUX_PS8742 -#include "ps8740.h" -#undef CONFIG_USB_MUX_PS8742 -#include "queue_policies.h" -#include "registers.h" -#include "spi.h" -#include "system.h" -#include "task.h" -#include "timer.h" -#include "update_fw.h" -#include "usart-stm32f0.h" -#include "usart_tx_dma.h" -#include "usart_rx_dma.h" -#include "usb_gpio.h" -#include "usb_i2c.h" -#include "usb_pd.h" -#include "usb_pd_config.h" -#include "usb_spi.h" -#include "usb-stream.h" -#include "util.h" - -#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args) -#define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args) - -/****************************************************************************** - * GPIO interrupt handlers. - */ - -static void vbus0_evt(enum gpio_signal signal) -{ - task_wake(TASK_ID_PD_C0); -} - -static void vbus1_evt(enum gpio_signal signal) -{ - task_wake(TASK_ID_PD_C1); -} - -static volatile uint64_t hpd_prev_ts; -static volatile int hpd_prev_level; - -/** - * Hotplug detect deferred task - * - * Called after level change on hpd GPIO to evaluate (and debounce) what event - * has occurred. There are 3 events that occur on HPD: - * 1. low : downstream display sink is deattached - * 2. high : downstream display sink is attached - * 3. irq : downstream display sink signalling an interrupt. - * - * The debounce times for these various events are: - * HPD_USTREAM_DEBOUNCE_LVL : min pulse width of level value. - * HPD_USTREAM_DEBOUNCE_IRQ : min pulse width of IRQ low pulse. - * - * lvl(n-2) lvl(n-1) lvl prev_delta now_delta event - * ---------------------------------------------------- - * 1 0 1 <IRQ n/a low glitch (ignore) - * 1 0 1 >IRQ <LVL irq - * x 0 1 n/a >LVL high - * 0 1 0 <LVL n/a high glitch (ignore) - * x 1 0 n/a >LVL low - */ - -void hpd_irq_deferred(void) -{ - int dp_mode = pd_alt_mode(1, TCPCI_MSG_SOP, USB_SID_DISPLAYPORT); - - if (dp_mode) { - pd_send_hpd(DUT, hpd_irq); - CPRINTS("HPD IRQ"); - } -} -DECLARE_DEFERRED(hpd_irq_deferred); - -void hpd_lvl_deferred(void) -{ - int level = gpio_get_level(GPIO_DP_HPD); - int dp_mode = pd_alt_mode(1, TCPCI_MSG_SOP, USB_SID_DISPLAYPORT); - - if (level != hpd_prev_level) { - /* It's a glitch while in deferred or canceled action */ - return; - } - - if (dp_mode) { - pd_send_hpd(DUT, level ? hpd_high : hpd_low); - CPRINTS("HPD: %d", level); - } -} -DECLARE_DEFERRED(hpd_lvl_deferred); - -void hpd_evt(enum gpio_signal signal) -{ - timestamp_t now = get_time(); - int level = gpio_get_level(signal); - uint64_t cur_delta = now.val - hpd_prev_ts; - - /* Store current time */ - hpd_prev_ts = now.val; - - /* All previous hpd level events need to be re-triggered */ - hook_call_deferred(&hpd_lvl_deferred_data, -1); - - /* It's a glitch. Previous time moves but level is the same. */ - if (cur_delta < HPD_USTREAM_DEBOUNCE_IRQ) - return; - - if ((!hpd_prev_level && level) && - (cur_delta < HPD_USTREAM_DEBOUNCE_LVL)) { - /* It's an irq */ - hook_call_deferred(&hpd_irq_deferred_data, 0); - } else if (cur_delta >= HPD_USTREAM_DEBOUNCE_LVL) { - hook_call_deferred(&hpd_lvl_deferred_data, - HPD_USTREAM_DEBOUNCE_LVL); - } - - hpd_prev_level = level; -} - -#include "gpio_list.h" - -/****************************************************************************** - * Board pre-init function. - */ - -void board_config_pre_init(void) -{ - /* enable SYSCFG clock */ - STM32_RCC_APB2ENR |= BIT(0); - - /* - * the DMA mapping is : - * Chan 2 : TIM1_CH1 (CHG RX) - Default mapping - * Chan 3 : SPI1_TX (CHG TX) - Default mapping - * Chan 4 : USART1 TX - Remapped from default Chan 2 - * Chan 5 : USART1 RX - Remapped from default Chan 3 - * Chan 6 : TIM3_CH1 (DUT RX) - Remapped from default Chan 4 - * Chan 7 : SPI2_TX (DUT TX) - Remapped from default Chan 5 - * - * As described in the comments above, both USART1 TX/RX and DUT Tx/RX - * channels must be remapped from the defulat locations. Remapping is - * acoomplished by setting the following bits in the STM32_SYSCFG_CFGR1 - * register. Information about this register and its settings can be - * found in section 11.3.7 DMA Request Mapping of the STM RM0091 - * Reference Manual - */ - /* Remap USART1 Tx from DMA channel 2 to channel 4 */ - STM32_SYSCFG_CFGR1 |= BIT(9); - /* Remap USART1 Rx from DMA channel 3 to channel 5 */ - STM32_SYSCFG_CFGR1 |= BIT(10); - /* Remap TIM3_CH1 from DMA channel 4 to channel 6 */ - STM32_SYSCFG_CFGR1 |= BIT(30); - /* Remap SPI2 Tx from DMA channel 5 to channel 7 */ - STM32_SYSCFG_CFGR1 |= BIT(24); -} - -/****************************************************************************** - * Set up USB PD - */ - -/* ADC channels */ -const struct adc_t adc_channels[] = { - /* USB PD CC lines sensing. Converted to mV (3300mV/4096). */ - [ADC_CHG_CC1_PD] = {"CHG_CC1_PD", 3300, 4096, 0, STM32_AIN(2)}, - [ADC_CHG_CC2_PD] = {"CHG_CC2_PD", 3300, 4096, 0, STM32_AIN(4)}, - [ADC_DUT_CC1_PD] = {"DUT_CC1_PD", 3300, 4096, 0, STM32_AIN(0)}, - [ADC_DUT_CC2_PD] = {"DUT_CC2_PD", 3300, 4096, 0, STM32_AIN(5)}, - [ADC_SBU1_DET] = {"SBU1_DET", 3300, 4096, 0, STM32_AIN(3)}, - [ADC_SBU2_DET] = {"SBU2_DET", 3300, 4096, 0, STM32_AIN(7)}, - [ADC_SUB_C_REF] = {"SUB_C_REF", 3300, 4096, 0, STM32_AIN(1)}, -}; -BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT); - - -/****************************************************************************** - * Forward UARTs as a USB serial interface. - */ - -#define USB_STREAM_RX_SIZE 16 -#define USB_STREAM_TX_SIZE 16 - -/****************************************************************************** - * Forward USART3 as a simple USB serial interface. - */ - -static struct usart_config const usart3; -struct usb_stream_config const usart3_usb; - -static struct queue const usart3_to_usb = QUEUE_DIRECT(64, uint8_t, - usart3.producer, usart3_usb.consumer); -static struct queue const usb_to_usart3 = QUEUE_DIRECT(64, uint8_t, - usart3_usb.producer, usart3.consumer); - -static struct usart_config const usart3 = - USART_CONFIG(usart3_hw, - usart_rx_interrupt, - usart_tx_interrupt, - 115200, - 0, - usart3_to_usb, - usb_to_usart3); - -USB_STREAM_CONFIG(usart3_usb, - USB_IFACE_USART3_STREAM, - USB_STR_USART3_STREAM_NAME, - USB_EP_USART3_STREAM, - USB_STREAM_RX_SIZE, - USB_STREAM_TX_SIZE, - usb_to_usart3, - usart3_to_usb) - - -/****************************************************************************** - * Forward USART4 as a simple USB serial interface. - */ - -static struct usart_config const usart4; -struct usb_stream_config const usart4_usb; - -static struct queue const usart4_to_usb = QUEUE_DIRECT(64, uint8_t, - usart4.producer, usart4_usb.consumer); -static struct queue const usb_to_usart4 = QUEUE_DIRECT(64, uint8_t, - usart4_usb.producer, usart4.consumer); - -static struct usart_config const usart4 = - USART_CONFIG(usart4_hw, - usart_rx_interrupt, - usart_tx_interrupt, - 9600, - 0, - usart4_to_usb, - usb_to_usart4); - -USB_STREAM_CONFIG(usart4_usb, - USB_IFACE_USART4_STREAM, - USB_STR_USART4_STREAM_NAME, - USB_EP_USART4_STREAM, - USB_STREAM_RX_SIZE, - USB_STREAM_TX_SIZE, - usb_to_usart4, - usart4_to_usb) - -/* - * Define usb interface descriptor for the `EMPTY` usb interface, to satisfy - * UEFI and kernel requirements (see b/183857501). - */ -const struct usb_interface_descriptor -USB_IFACE_DESC(USB_IFACE_EMPTY) = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bInterfaceNumber = USB_IFACE_EMPTY, - .bAlternateSetting = 0, - .bNumEndpoints = 0, - .bInterfaceClass = USB_CLASS_VENDOR_SPEC, - .bInterfaceSubClass = 0, - .bInterfaceProtocol = 0, - .iInterface = 0, -}; - -/****************************************************************************** - * Define the strings used in our USB descriptors. - */ - -const void *const usb_strings[] = { - [USB_STR_DESC] = usb_string_desc, - [USB_STR_VENDOR] = USB_STRING_DESC("Google Inc."), - [USB_STR_PRODUCT] = USB_STRING_DESC("Servo V4"), - [USB_STR_SERIALNO] = USB_STRING_DESC("1234-a"), - [USB_STR_VERSION] = USB_STRING_DESC(CROS_EC_VERSION32), - [USB_STR_I2C_NAME] = USB_STRING_DESC("I2C"), - [USB_STR_CONSOLE_NAME] = USB_STRING_DESC("Servo EC Shell"), - [USB_STR_USART3_STREAM_NAME] = USB_STRING_DESC("DUT UART"), - [USB_STR_USART4_STREAM_NAME] = USB_STRING_DESC("Atmega UART"), - [USB_STR_UPDATE_NAME] = USB_STRING_DESC("Firmware update"), -}; - -BUILD_ASSERT(ARRAY_SIZE(usb_strings) == USB_STR_COUNT); - - - -/****************************************************************************** - * Support I2C bridging over USB. - */ - -/* I2C ports */ -const struct i2c_port_t i2c_ports[] = { - {"master", I2C_PORT_MASTER, 100, - GPIO_MASTER_I2C_SCL, GPIO_MASTER_I2C_SDA}, -}; -const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports); - -int usb_i2c_board_is_enabled(void) { return 1; } - -/****************************************************************************** - * Initialize board. - */ - -/* - * Support tca6416 I2C ioexpander. - */ -#define GPIOX_I2C_ADDR_FLAGS 0x20 -#define GPIOX_IN_PORT_A 0x0 -#define GPIOX_IN_PORT_B 0x1 -#define GPIOX_OUT_PORT_A 0x2 -#define GPIOX_OUT_PORT_B 0x3 -#define GPIOX_DIR_PORT_A 0x6 -#define GPIOX_DIR_PORT_B 0x7 - - -/* Write a GPIO output on the tca6416 I2C ioexpander. */ -static void write_ioexpander(int bank, int gpio, int val) -{ - int tmp; - - /* Read output port register */ - i2c_read8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_OUT_PORT_A + bank, &tmp); - if (val) - tmp |= BIT(gpio); - else - tmp &= ~BIT(gpio); - /* Write back modified output port register */ - i2c_write8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_OUT_PORT_A + bank, tmp); -} - -/* Read a single GPIO input on the tca6416 I2C ioexpander. */ -static int read_ioexpander_bit(int bank, int bit) -{ - int tmp; - int mask = 1 << bit; - - /* Read input port register */ - i2c_read8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_IN_PORT_A + bank, &tmp); - - return (tmp & mask) >> bit; -} - -/* Enable uservo USB. */ -static void init_uservo_port(void) -{ - /* Write USERVO_POWER_EN */ - write_ioexpander(0, 7, 1); - /* Write USERVO_FASTBOOT_MUX_SEL */ - write_ioexpander(1, 0, 0); -} - -/* Enable blue USB port to DUT. */ -static void init_usb3_port(void) -{ - /* Write USB3.0_TYPEA_MUX_SEL */ - write_ioexpander(0, 3, 1); - /* Write USB3.0_TYPEA_MUX_EN_L */ - write_ioexpander(0, 4, 0); - /* Write USB3.0_TYPE_A_PWR_EN */ - write_ioexpander(0, 5, 1); -} - -/* Enable all ioexpander outputs. */ -static void init_ioexpander(void) -{ - /* Write all GPIO to output 0 */ - i2c_write8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_OUT_PORT_A, 0x0); - i2c_write8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_OUT_PORT_B, 0x0); - - /* - * Write GPIO direction: strap resistors to input, - * all others to output. - */ - i2c_write8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_DIR_PORT_A, 0x0); - i2c_write8(1, GPIOX_I2C_ADDR_FLAGS, GPIOX_DIR_PORT_B, 0x18); -} - -/* - * Define voltage thresholds for SBU USB detection. - * - * Max observed USB low across sampled systems: 666mV - * Min observed USB high across sampled systems: 3026mV - */ -#define GND_MAX_MV 700 -#define USB_HIGH_MV 2500 -#define SBU_DIRECT 0 -#define SBU_FLIP 1 - -#define MODE_SBU_DISCONNECT 0 -#define MODE_SBU_CONNECT 1 -#define MODE_SBU_FLIP 2 -#define MODE_SBU_OTHER 3 - -static void ccd_measure_sbu(void); -DECLARE_DEFERRED(ccd_measure_sbu); -static void ccd_measure_sbu(void) -{ - int sbu1; - int sbu2; - int mux_en; - static int count /* = 0 */; - static int last /* = 0 */; - static int polarity /* = 0 */; - - /* Read sbu voltage levels */ - sbu1 = adc_read_channel(ADC_SBU1_DET); - sbu2 = adc_read_channel(ADC_SBU2_DET); - mux_en = gpio_get_level(GPIO_SBU_MUX_EN); - - /* - * While SBU_MUX is disabled (SuzyQ unplugged), we'll poll the SBU lines - * to check if an idling, unconfigured USB device is present. - * USB FS pulls one line high for connect request. - * If so, and it persists for 500ms, we'll enable the SuzyQ in that - * orientation. - */ - if ((!mux_en) && (sbu1 > USB_HIGH_MV) && (sbu2 < GND_MAX_MV)) { - /* Check flip connection polarity. */ - if (last != MODE_SBU_FLIP) { - last = MODE_SBU_FLIP; - polarity = SBU_FLIP; - count = 0; - } else { - count++; - } - } else if ((!mux_en) && (sbu2 > USB_HIGH_MV) && (sbu1 < GND_MAX_MV)) { - /* Check direct connection polarity. */ - if (last != MODE_SBU_CONNECT) { - last = MODE_SBU_CONNECT; - polarity = SBU_DIRECT; - count = 0; - } else { - count++; - } - /* - * If SuzyQ is enabled, we'll poll for a persistent no-signal for - * 500ms. Since USB is differential, we should never see GND/GND - * while the device is connected. - * If disconnected, electrically remove SuzyQ. - */ - } else if ((mux_en) && (sbu1 < GND_MAX_MV) && (sbu2 < GND_MAX_MV)) { - /* Check for SBU disconnect if connected. */ - if (last != MODE_SBU_DISCONNECT) { - last = MODE_SBU_DISCONNECT; - count = 0; - } else { - count++; - } - } else { - /* Didn't find anything, reset state. */ - last = MODE_SBU_OTHER; - count = 0; - } - - /* - * We have seen a new state continuously for 500ms. - * Let's update the mux to enable/disable SuzyQ appropriately. - */ - if (count > 5) { - if (mux_en) { - /* Disable mux as it's disconnected now. */ - gpio_set_level(GPIO_SBU_MUX_EN, 0); - msleep(10); - CPRINTS("CCD: disconnected."); - } else { - /* SBU flip = polarity */ - write_ioexpander(0, 2, polarity); - gpio_set_level(GPIO_SBU_MUX_EN, 1); - msleep(10); - CPRINTS("CCD: connected %s", - polarity ? "flip" : "noflip"); - } - } - - /* Measure every 100ms, forever. */ - hook_call_deferred(&ccd_measure_sbu_data, 100 * MSEC); -} - -void ext_hpd_detection_enable(int enable) -{ - if (enable) { - timestamp_t now = get_time(); - - hpd_prev_level = gpio_get_level(GPIO_DP_HPD); - hpd_prev_ts = now.val; - gpio_enable_interrupt(GPIO_DP_HPD); - } else { - gpio_disable_interrupt(GPIO_DP_HPD); - } -} - -void ccd_enable(int enable) -{ - if (enable) { - hook_call_deferred(&ccd_measure_sbu_data, 0); - } else { - gpio_set_level(GPIO_SBU_MUX_EN, 0); - hook_call_deferred(&ccd_measure_sbu_data, -1); - } -} - -int board_get_version(void) -{ - static int ver = -1; - - if (ver < 0) { - uint8_t id0, id1; - - id0 = read_ioexpander_bit(1, 3); - id1 = read_ioexpander_bit(1, 4); - - ver = (id1 * 2) + id0; - CPRINTS("Board ID = %d", ver); - } - - return ver; -} - -static void board_init(void) -{ - /* USB to serial queues */ - queue_init(&usart3_to_usb); - queue_init(&usb_to_usart3); - queue_init(&usart4_to_usb); - queue_init(&usb_to_usart4); - - /* UART init */ - usart_init(&usart3); - usart_init(&usart4); - - /* Delay DUT hub to avoid brownout. */ - usleep(1000); - gpio_set_flags(GPIO_DUT_HUB_USB_RESET_L, GPIO_OUT_HIGH); - - /* - * Disable USB3 mode in PS8742 USB/DP Mux. - */ - i2c_write8(I2C_PORT_MASTER, PS8740_I2C_ADDR0_FLAG, PS8740_REG_MODE, 0); - - /* Enable uservo USB by default. */ - init_ioexpander(); - init_uservo_port(); - init_usb3_port(); - - /* Clear BBRAM, we don't want any PD state carried over on reset. */ - system_set_bbram(SYSTEM_BBRAM_IDX_PD0, 0); - system_set_bbram(SYSTEM_BBRAM_IDX_PD1, 0); - - /* - * Disable SBU mux. The polarity is set each time a presense is detected - * on SBU, and wired thorugh. On missing voltage on SBU. SBU wires are - * disconnected. - */ - gpio_set_level(GPIO_SBU_MUX_EN, 0); - - /* - * Voltage transition needs to occur in lockstep between the CHG and - * DUT ports, so initially limit voltage to 5V. - */ - pd_set_max_voltage(PD_MIN_MV); - - /* Enable VBUS detection to wake PD tasks fast enough */ - gpio_enable_interrupt(GPIO_USB_DET_PP_CHG); - gpio_enable_interrupt(GPIO_USB_DET_PP_DUT); - - hook_call_deferred(&ccd_measure_sbu_data, 1000 * MSEC); -} -DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT); |