mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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7e14583689
While SPI routing on servo is not great, this is still fine and asn't as painfully slow. BUG=chromium:571477 TEST=flash some firmware BRANCH=None Change-Id: I26d67ed6cd1ba62a892388e96a21acc708265fc4 Signed-off-by: Nick Sanders <nsanders@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/366670 Reviewed-by: Randall Spangler <rspangler@chromium.org>
249 lines
7.0 KiB
C
249 lines
7.0 KiB
C
/* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Servo micro board configuration */
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#include "common.h"
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#include "ec_version.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "i2c.h"
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#include "queue_policies.h"
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#include "registers.h"
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#include "spi.h"
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#include "task.h"
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#include "update_fw.h"
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#include "usart-stm32f0.h"
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#include "usart_tx_dma.h"
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#include "usart_rx_dma.h"
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#include "usb_i2c.h"
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#include "usb_spi.h"
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#include "usb-stream.h"
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#include "util.h"
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#include "gpio_list.h"
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/******************************************************************************
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* Forward UARTs as a USB serial interface.
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*/
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#define USB_STREAM_RX_SIZE 16
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#define USB_STREAM_TX_SIZE 16
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/******************************************************************************
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* Forward USART2 as a simple USB serial interface.
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*/
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static struct usart_config const usart2;
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struct usb_stream_config const usart2_usb;
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static struct queue const usart2_to_usb = QUEUE_DIRECT(64, uint8_t,
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usart2.producer, usart2_usb.consumer);
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static struct queue const usb_to_usart2 = QUEUE_DIRECT(64, uint8_t,
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usart2_usb.producer, usart2.consumer);
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static struct usart_config const usart2 =
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USART_CONFIG(usart2_hw,
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usart_rx_interrupt,
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usart_tx_interrupt,
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115200,
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usart2_to_usb,
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usb_to_usart2);
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USB_STREAM_CONFIG(usart2_usb,
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USB_IFACE_USART2_STREAM,
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USB_STR_USART2_STREAM_NAME,
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USB_EP_USART2_STREAM,
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USB_STREAM_RX_SIZE,
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USB_STREAM_TX_SIZE,
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usb_to_usart2,
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usart2_to_usb)
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/******************************************************************************
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* Forward USART3 as a simple USB serial interface.
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*/
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static struct usart_config const usart3;
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struct usb_stream_config const usart3_usb;
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static struct queue const usart3_to_usb = QUEUE_DIRECT(64, uint8_t,
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usart3.producer, usart3_usb.consumer);
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static struct queue const usb_to_usart3 = QUEUE_DIRECT(64, uint8_t,
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usart3_usb.producer, usart3.consumer);
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static struct usart_config const usart3 =
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USART_CONFIG(usart3_hw,
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usart_rx_interrupt,
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usart_tx_interrupt,
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115200,
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usart3_to_usb,
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usb_to_usart3);
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USB_STREAM_CONFIG(usart3_usb,
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USB_IFACE_USART3_STREAM,
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USB_STR_USART3_STREAM_NAME,
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USB_EP_USART3_STREAM,
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USB_STREAM_RX_SIZE,
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USB_STREAM_TX_SIZE,
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usb_to_usart3,
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usart3_to_usb)
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/******************************************************************************
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* Forward USART4 as a simple USB serial interface.
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*/
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static struct usart_config const usart4;
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struct usb_stream_config const usart4_usb;
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static struct queue const usart4_to_usb = QUEUE_DIRECT(64, uint8_t,
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usart4.producer, usart4_usb.consumer);
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static struct queue const usb_to_usart4 = QUEUE_DIRECT(64, uint8_t,
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usart4_usb.producer, usart4.consumer);
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static struct usart_config const usart4 =
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USART_CONFIG(usart4_hw,
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usart_rx_interrupt,
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usart_tx_interrupt,
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115200,
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usart4_to_usb,
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usb_to_usart4);
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USB_STREAM_CONFIG(usart4_usb,
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USB_IFACE_USART4_STREAM,
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USB_STR_USART4_STREAM_NAME,
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USB_EP_USART4_STREAM,
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USB_STREAM_RX_SIZE,
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USB_STREAM_TX_SIZE,
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usb_to_usart4,
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usart4_to_usb)
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/******************************************************************************
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* Define the strings used in our USB descriptors.
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*/
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const void *const usb_strings[] = {
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[USB_STR_DESC] = usb_string_desc,
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[USB_STR_VENDOR] = USB_STRING_DESC("Google Inc."),
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[USB_STR_PRODUCT] = USB_STRING_DESC("Servo Micro"),
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[USB_STR_SERIALNO] = 0,
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[USB_STR_VERSION] = USB_STRING_DESC(CROS_EC_VERSION32),
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[USB_STR_USART4_STREAM_NAME] = USB_STRING_DESC("Servo UART3"),
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[USB_STR_CONSOLE_NAME] = USB_STRING_DESC("Servo EC Shell"),
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[USB_STR_USART3_STREAM_NAME] = USB_STRING_DESC("Servo UART2"),
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[USB_STR_USART2_STREAM_NAME] = USB_STRING_DESC("Servo UART1"),
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[USB_STR_UPDATE_NAME] = USB_STRING_DESC("Firmware update"),
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};
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BUILD_ASSERT(ARRAY_SIZE(usb_strings) == USB_STR_COUNT);
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/******************************************************************************
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* Support SPI bridging over USB, this requires usb_spi_board_enable and
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* usb_spi_board_disable to be defined to enable and disable the SPI bridge.
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*/
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/* SPI devices */
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const struct spi_device_t spi_devices[] = {
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{ CONFIG_SPI_FLASH_PORT, 1, GPIO_SPI_CS},
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};
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const unsigned int spi_devices_used = ARRAY_SIZE(spi_devices);
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void usb_spi_board_enable(struct usb_spi_config const *config)
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{
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/* Remap SPI2 to DMA channels 6 and 7 */
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/* STM32F072 SPI2 defaults to using DMA channels 4 and 5 */
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/* but cros_ec hardcodes a 6/7 assumption in registers.h */
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STM32_SYSCFG_CFGR1 |= (1 << 24);
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/* Configure SPI GPIOs */
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gpio_config_module(MODULE_SPI_FLASH, 1);
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/* Set all four SPI pins to high speed */
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STM32_GPIO_OSPEEDR(GPIO_B) |= 0xff000000;
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/* Enable clocks to SPI2 module */
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STM32_RCC_APB1ENR |= STM32_RCC_PB1_SPI2;
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/* Reset SPI2 */
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STM32_RCC_APB1RSTR |= STM32_RCC_PB1_SPI2;
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STM32_RCC_APB1RSTR &= ~STM32_RCC_PB1_SPI2;
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spi_enable(CONFIG_SPI_FLASH_PORT, 1);
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}
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void usb_spi_board_disable(struct usb_spi_config const *config)
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{
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spi_enable(CONFIG_SPI_FLASH_PORT, 0);
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/* Disable clocks to SPI2 module */
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STM32_RCC_APB1ENR &= ~STM32_RCC_PB1_SPI2;
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/* Release SPI GPIOs */
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gpio_config_module(MODULE_SPI_FLASH, 0);
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}
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USB_SPI_CONFIG(usb_spi, USB_IFACE_SPI, USB_EP_SPI);
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/******************************************************************************
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* Support I2C bridging over USB, this requires usb_i2c_board_enable and
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* usb_i2c_board_disable to be defined to enable and disable the SPI bridge.
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*/
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/* I2C ports */
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const struct i2c_port_t i2c_ports[] = {
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{"master", I2C_PORT_MASTER, 100,
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GPIO_MASTER_I2C_SCL, GPIO_MASTER_I2C_SDA},
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};
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const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
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USB_I2C_CONFIG(usb_i2c, USB_IFACE_I2C, USB_EP_I2C);
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/******************************************************************************
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* Support firmware upgrade over USB. We can update whichever section is not
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* the current section.
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*/
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/*
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* This array defines possible sections available for the firmware update.
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* The section which does not map the current executing code is picked as the
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* valid update area. The values are offsets into the flash space.
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*/
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const struct section_descriptor board_rw_sections[] = {
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{CONFIG_RO_MEM_OFF,
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CONFIG_RO_MEM_OFF + CONFIG_RO_SIZE},
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{CONFIG_RW_MEM_OFF,
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CONFIG_RW_MEM_OFF + CONFIG_RW_SIZE},
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};
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const struct section_descriptor * const rw_sections = board_rw_sections;
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const int num_rw_sections = ARRAY_SIZE(board_rw_sections);
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/******************************************************************************
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* Initialize board.
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*/
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static void board_init(void)
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{
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/* USB to serial queues */
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queue_init(&usart2_to_usb);
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queue_init(&usb_to_usart2);
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queue_init(&usart3_to_usb);
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queue_init(&usb_to_usart3);
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queue_init(&usart4_to_usb);
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queue_init(&usb_to_usart4);
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/* UART init */
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usart_init(&usart2);
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usart_init(&usart3);
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usart_init(&usart4);
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/* Enable GPIO expander. */
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gpio_set_level(GPIO_TCA6416_RESET_L, 1);
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/* Structured enpoints */
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usb_spi_enable(&usb_spi, 1);
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}
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DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
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