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/* Copyright (c) 2014 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.
*/
/* Firefly board configuration */
#include "adc.h"
#include "adc_chip.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "registers.h"
#include "task.h"
#include "timer.h"
#include "usb_pd.h"
#include "util.h"
/* Debounce time for voltage buttons */
#define BUTTON_DEBOUNCE_US (100 * MSEC)
static enum gpio_signal button_pressed;
/* Handle debounced button press */
static void button_deferred(void)
{
int mv;
/* bounce ? */
if (gpio_get_level(button_pressed) != 0)
return;
switch (button_pressed) {
case GPIO_SW_PP20000:
mv = 20000;
break;
case GPIO_SW_PP12000:
mv = 12000;
break;
case GPIO_SW_PP5000:
mv = 5000;
break;
default:
mv = -1;
}
pd_request_source_voltage(mv);
ccprintf("Button %d = %d => Vout=%d mV\n",
button_pressed, gpio_get_level(button_pressed), mv);
}
DECLARE_DEFERRED(button_deferred);
void button_event(enum gpio_signal signal)
{
button_pressed = signal;
/* reset debounce time */
hook_call_deferred(button_deferred, BUTTON_DEBOUNCE_US);
}
void vbus_event(enum gpio_signal signal)
{
ccprintf("VBUS! =%d\n", gpio_get_level(signal));
}
void board_config_pre_init(void)
{
/* enable SYSCFG clock */
STM32_RCC_APB2ENR |= 1 << 0;
/* Remap USART DMA to match the USART driver */
/*
* the DMA mapping is :
* Chan 2 : TIM1_CH1 (PD RX)
* Chan 3 : SPI1_TX (PD TX)
* Chan 4 : USART1_TX
* Chan 5 : USART1_RX
*/
STM32_SYSCFG_CFGR1 |= (1 << 9) | (1 << 10);/* Remap USART1 RX/TX DMA */
}
/* GPIO signal list. Must match order from enum gpio_signal. */
const struct gpio_info gpio_list[] = {
{"VBUS_WAKE", GPIO_C, (1<<13), GPIO_INT_BOTH, vbus_event},
/* Buttons */
{"SW_PP20000", GPIO_B, (1<<10), GPIO_INT_FALLING, button_event},
{"SW_PP12000", GPIO_B, (1<<11), GPIO_INT_FALLING, button_event},
{"SW_PP5000", GPIO_B, (1<<12), GPIO_INT_FALLING, button_event},
/* PD RX/TX */
{"USB_CC1_PD", GPIO_A, (1<<0), GPIO_ANALOG, NULL},
{"PD_REF1", GPIO_A, (1<<1), GPIO_ANALOG, NULL},
{"USB_CC2_PD", GPIO_A, (1<<2), GPIO_ANALOG, NULL},
{"PD_REF2", GPIO_A, (1<<3), GPIO_ANALOG, NULL},
{"PD_CC1_TX_EN", GPIO_A, (1<<4), GPIO_ODR_HIGH, NULL},
{"PD_CC2_TX_EN", GPIO_A, (1<<15), GPIO_ODR_HIGH, NULL},
{"PD_CLK_OUT", GPIO_B, (1<<9), GPIO_OUT_LOW, NULL},
{"PD_CC1_TX_DATA", GPIO_A, (1<<6), GPIO_INPUT, NULL},
{"PD_CC2_TX_DATA", GPIO_B, (1<<4), GPIO_INPUT, NULL},
{"PD_CLK_IN", GPIO_B, (1<<3), GPIO_INPUT, NULL},
/* CCx device pull-downs */
{"PD_CC1_DEVICE", GPIO_B, (1<<13), GPIO_ODR_LOW, NULL},
{"PD_CC2_DEVICE", GPIO_B, (1<<14), GPIO_ODR_LOW, NULL},
/* ADC */
{"VBUS_SENSE", GPIO_A, (1<<5), GPIO_ANALOG, NULL},
/* LEDs control */
{"LED_PP20000", GPIO_B, (1<<0), GPIO_OUT_LOW, NULL},
{"LED_PP12000", GPIO_B, (1<<1), GPIO_OUT_LOW, NULL},
{"LED_PP5000", GPIO_B, (1<<2), GPIO_OUT_LOW, NULL},
/* Slave I2C port */
{"I2C_INT_L", GPIO_B, (1<<8), GPIO_ODR_HIGH, NULL},
/*
* I2C pins should be configured as inputs until I2C module is
* initialized. This will avoid driving the lines unintentionally.
*/
{"I2C_SCL", GPIO_B, (1<<6), GPIO_INPUT, NULL},
{"I2C_SDA", GPIO_B, (1<<7), GPIO_INPUT, NULL},
/* Test points */
{"TP_A8", GPIO_A, (1<<8), GPIO_ODR_HIGH, NULL},
{"TP_A13", GPIO_A, (1<<13), GPIO_ODR_HIGH, NULL},
{"TP_A14", GPIO_A, (1<<14), GPIO_ODR_HIGH, NULL},
{"TP_B15", GPIO_B, (1<<15), GPIO_ODR_HIGH, NULL},
{"TP_C14", GPIO_C, (1<<14), GPIO_ODR_HIGH, NULL},
{"TP_C15", GPIO_C, (1<<15), GPIO_ODR_HIGH, NULL},
{"TP_F0", GPIO_F, (1<<0), GPIO_ODR_HIGH, NULL},
{"TP_F1", GPIO_F, (1<<1), GPIO_ODR_HIGH, NULL},
/* Unimplemented signals which we need to emulate for now */
GPIO_SIGNAL_NOT_IMPLEMENTED("ENTERING_RW"),
GPIO_SIGNAL_NOT_IMPLEMENTED("WP_L"),
};
BUILD_ASSERT(ARRAY_SIZE(gpio_list) == GPIO_COUNT);
/* Pins with alternate functions */
const struct gpio_alt_func gpio_alt_funcs[] = {
{GPIO_B, 0x0008, 0, MODULE_USB_PD},/* SPI1: SCK(PB3) */
{GPIO_B, 0x0200, 2, MODULE_USB_PD},/* TIM17_CH1: PB9) */
{GPIO_A, 0x0600, 1, MODULE_UART, GPIO_PULL_UP},/* USART1: PA9/PA10 */
{GPIO_B, 0x00c0, 1, MODULE_I2C}, /* I2C SLAVE:PB6/7 */
};
const int gpio_alt_funcs_count = ARRAY_SIZE(gpio_alt_funcs);
/* ADC channels */
const struct adc_t adc_channels[] = {
/* USB PD CC lines sensing. Converted to mV (3300mV/4096). */
[ADC_CH_CC1_PD] = {"CC1_PD", 3300, 4096, 0, STM32_AIN(0)},
[ADC_CH_CC2_PD] = {"CC2_PD", 3300, 4096, 0, STM32_AIN(2)},
/* VBUS voltage sensing is behind a 10K/100K voltage divider */
[ADC_CH_VBUS_SENSE] = {"VBUS", 36300, 4096, 0, STM32_AIN(5)},
};
BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
/* I2C ports */
const struct i2c_port_t i2c_ports[] = {
};
const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
static void board_init(void)
{
gpio_enable_interrupt(GPIO_SW_PP20000);
gpio_enable_interrupt(GPIO_SW_PP12000);
gpio_enable_interrupt(GPIO_SW_PP5000);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
static int command_volt(int argc, char **argv)
{
int millivolt = -1;
if (argc >= 2) {
char *e;
millivolt = strtoi(argv[1], &e, 10) * 1000;
}
ccprintf("Request Vout=%d mV\n", millivolt);
pd_request_source_voltage(millivolt);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(volt, command_volt,
"[5|12|20]",
"set voltage through USB PD",
NULL);
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