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/* 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 micro board configuration */
#include "common.h"
#include "ec_version.h"
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "queue_policies.h"
#include "registers.h"
#include "spi.h"
#include "task.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_spi.h"
#include "usb-stream.h"
#include "util.h"
/******************************************************************************
* Build GPIO tables and expose a subset of the GPIOs over USB.
*/
#include "gpio_list.h"
static enum gpio_signal const usb_gpio_list[] = {
GPIO_UART1_EN_L,
GPIO_SERVO_JTAG_TRST_L,
GPIO_SPI1_BUF_EN_L,
GPIO_SPI2_BUF_EN_L,
GPIO_UART2_EN_L,
GPIO_SPI1_VREF_33,
GPIO_SPI1_VREF_18,
GPIO_SPI2_VREF_33,
GPIO_SPI2_VREF_18,
GPIO_SERVO_JTAG_TRST_DIR,
GPIO_SERVO_JTAG_TDI_DIR,
GPIO_TCA6416_RESET_L
};
/*
* This instantiates struct usb_gpio_config const usb_gpio, plus several other
* variables, all named something beginning with usb_gpio_
*/
USB_GPIO_CONFIG(usb_gpio,
usb_gpio_list,
USB_IFACE_GPIO,
USB_EP_GPIO);
/******************************************************************************
* Forward UARTs as a USB serial interface.
*/
#define USB_STREAM_RX_SIZE 16
#define USB_STREAM_TX_SIZE 16
/******************************************************************************
* Forward USART2 as a simple USB serial interface.
*/
static struct usart_config const usart2;
struct usb_stream_config const usart2_usb;
static struct queue const usart2_to_usb = QUEUE_DIRECT(64, uint8_t,
usart2.producer, usart2_usb.consumer);
static struct queue const usb_to_usart2 = QUEUE_DIRECT(64, uint8_t,
usart2_usb.producer, usart2.consumer);
static struct usart_config const usart2 =
USART_CONFIG(usart2_hw,
usart_rx_interrupt,
usart_tx_interrupt,
115200,
usart2_to_usb,
usb_to_usart2);
USB_STREAM_CONFIG(usart2_usb,
USB_IFACE_USART2_STREAM,
USB_STR_USART2_STREAM_NAME,
USB_EP_USART2_STREAM,
USB_STREAM_RX_SIZE,
USB_STREAM_TX_SIZE,
usb_to_usart2,
usart2_to_usb)
/******************************************************************************
* 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,
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,
115200,
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 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 Micro"),
[USB_STR_SERIALNO] = USB_STRING_DESC("1234-a"),
[USB_STR_VERSION] = USB_STRING_DESC(CROS_EC_VERSION32),
[USB_STR_USART4_STREAM_NAME] = USB_STRING_DESC("Servo UART3"),
[USB_STR_CONSOLE_NAME] = USB_STRING_DESC("Servo EC Shell"),
[USB_STR_USART3_STREAM_NAME] = USB_STRING_DESC("Servo UART2"),
[USB_STR_USART2_STREAM_NAME] = USB_STRING_DESC("Servo UART1"),
};
BUILD_ASSERT(ARRAY_SIZE(usb_strings) == USB_STR_COUNT);
/******************************************************************************
* Support SPI bridging over USB, this requires usb_spi_board_enable and
* usb_spi_board_disable to be defined to enable and disable the SPI bridge.
*/
/* SPI devices */
/* Set clock divider to 7 since our SPI routing is non-optimal. */
const struct spi_device_t spi_devices[] = {
{ CONFIG_SPI_FLASH_PORT, 7, GPIO_SPI_CS},
};
const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
void usb_spi_board_enable(struct usb_spi_config const *config)
{
/* Remap SPI2 to DMA channels 6 and 7 */
/* STM32F072 SPI2 defaults to using DMA channels 4 and 5 */
/* but cros_ec hardcodes a 6/7 assumption in registers.h */
STM32_SYSCFG_CFGR1 |= (1 << 24);
/* Configure SPI GPIOs */
gpio_config_module(MODULE_SPI_FLASH, 1);
/* Set all four SPI pins to high speed */
STM32_GPIO_OSPEEDR(GPIO_B) |= 0xff000000;
/* Enable clocks to SPI2 module */
STM32_RCC_APB1ENR |= STM32_RCC_PB1_SPI2;
/* Reset SPI2 */
STM32_RCC_APB1RSTR |= STM32_RCC_PB1_SPI2;
STM32_RCC_APB1RSTR &= ~STM32_RCC_PB1_SPI2;
spi_enable(CONFIG_SPI_FLASH_PORT, 1);
}
void usb_spi_board_disable(struct usb_spi_config const *config)
{
spi_enable(CONFIG_SPI_FLASH_PORT, 0);
/* Disable clocks to SPI2 module */
STM32_RCC_APB1ENR &= ~STM32_RCC_PB1_SPI2;
/* Release SPI GPIOs */
gpio_config_module(MODULE_SPI_FLASH, 0);
}
USB_SPI_CONFIG(usb_spi, USB_IFACE_SPI, USB_EP_SPI);
/******************************************************************************
* Support I2C bridging over USB, this requires usb_i2c_board_enable and
* usb_i2c_board_disable to be defined to enable and disable the SPI bridge.
*/
/* 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);
USB_I2C_CONFIG(usb_i2c, USB_IFACE_I2C, USB_EP_I2C);
/******************************************************************************
* Initialize board.
*/
static void board_init(void)
{
/* USB to serial queues */
queue_init(&usart2_to_usb);
queue_init(&usb_to_usart2);
queue_init(&usart3_to_usb);
queue_init(&usb_to_usart3);
queue_init(&usart4_to_usb);
queue_init(&usb_to_usart4);
/* UART init */
usart_init(&usart2);
usart_init(&usart3);
usart_init(&usart4);
/* Enable GPIO expander. */
gpio_set_level(GPIO_TCA6416_RESET_L, 1);
/* Structured enpoints */
usb_spi_enable(&usb_spi, 1);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
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