diff options
Diffstat (limited to 'chip/stm32/gpio.c')
| -rw-r--r-- | chip/stm32/gpio.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/chip/stm32/gpio.c b/chip/stm32/gpio.c deleted file mode 100644 index ccfd3399e2..0000000000 --- a/chip/stm32/gpio.c +++ /dev/null @@ -1,177 +0,0 @@ -/* Copyright 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. - */ - -/* GPIO module for Chrome EC */ - -#include "clock.h" -#include "common.h" -#include "console.h" -#include "gpio_chip.h" -#include "hooks.h" -#include "registers.h" -#include "system.h" -#include "task.h" -#include "util.h" - -/* Console output macros */ -#define CPRINTS(format, args...) cprints(CC_GPIO, format, ## args) -/* For each EXTI bit, record which GPIO entry is using it */ -static uint8_t exti_events[16]; - -void gpio_pre_init(void) -{ - const struct gpio_info *g = gpio_list; - const struct unused_pin_info *u = unused_pin_list; - int is_warm = system_is_reboot_warm(); - int i; - - /* Required to configure external IRQ lines (SYSCFG_EXTICRn) */ -#ifdef CHIP_FAMILY_STM32H7 - STM32_RCC_APB4ENR |= STM32_RCC_SYSCFGEN; -#else - STM32_RCC_APB2ENR |= STM32_RCC_SYSCFGEN; -#endif - - /* Delay 1 APB clock cycle after the clock is enabled */ - clock_wait_bus_cycles(BUS_APB, 1); - - /* Disable all GPIO EXTINTs (EXTINT0..15) left enabled after sysjump. */ - STM32_EXTI_IMR &= ~0xFFFF; - - if (!is_warm) - gpio_enable_clocks(); - - /* Set all GPIOs to defaults */ - for (i = 0; i < GPIO_COUNT; i++, g++) { - int flags = g->flags; - - if (flags & GPIO_DEFAULT) - continue; - - /* - * If this is a warm reboot, don't set the output levels or - * we'll shut off the AP. - */ - if (is_warm) - flags &= ~(GPIO_LOW | GPIO_HIGH); - - /* Set up GPIO based on flags */ - gpio_set_flags_by_mask(g->port, g->mask, flags); - } - - /* Configure optional unused pins for low power optimization. */ - for (i = 0; i < unused_pin_count; i++, u++) { - /* - * Configure unused pins as ANALOG INPUT to save power. - * For more info, please see - * "USING STM32F4 MCU POWER MODES WITH BEST DYNAMIC EFFICIENCY" - * ("AN4365") section 1.2.6 and section 7.3.12 of the STM32F412 - * reference manual. - */ - if (IS_ENABLED(CHIP_FAMILY_STM32F4)) - gpio_set_flags_by_mask(u->port, u->mask, GPIO_ANALOG); - } -} - -test_mockable int gpio_get_level(enum gpio_signal signal) -{ - return !!(STM32_GPIO_IDR(gpio_list[signal].port) & - gpio_list[signal].mask); -} - -void gpio_set_level(enum gpio_signal signal, int value) -{ - STM32_GPIO_BSRR(gpio_list[signal].port) = - gpio_list[signal].mask << (value ? 0 : 16); -} - -int gpio_enable_interrupt(enum gpio_signal signal) -{ - const struct gpio_info *g = gpio_list + signal; - const struct gpio_info *g_old = gpio_list; - - uint32_t bit, group, shift, bank; - - /* Fail if not implemented or no interrupt handler */ - if (!g->mask || signal >= GPIO_IH_COUNT) - return EC_ERROR_INVAL; - - bit = GPIO_MASK_TO_NUM(g->mask); - - g_old += exti_events[bit]; - - if ((exti_events[bit]) && (exti_events[bit] != signal)) { - CPRINTS("Overriding %s with %s on EXTI%d", - g_old->name, g->name, bit); - } - exti_events[bit] = signal; - - group = bit / 4; - shift = (bit % 4) * 4; - bank = (g->port - STM32_GPIOA_BASE) / 0x400; - - STM32_SYSCFG_EXTICR(group) = (STM32_SYSCFG_EXTICR(group) & - ~(0xF << shift)) | (bank << shift); - STM32_EXTI_IMR |= g->mask; - - return EC_SUCCESS; -} - -int gpio_disable_interrupt(enum gpio_signal signal) -{ - const struct gpio_info *g = gpio_list + signal; - uint32_t bit; - - /* Fail if not implemented or no interrupt handler */ - if (!g->mask || signal >= GPIO_IH_COUNT) - return EC_ERROR_INVAL; - - STM32_EXTI_IMR &= ~g->mask; - - bit = GPIO_MASK_TO_NUM(g->mask); - - exti_events[bit] = 0; - - return EC_SUCCESS; -} - -int gpio_clear_pending_interrupt(enum gpio_signal signal) -{ - const struct gpio_info *g = gpio_list + signal; - - if (!g->mask || signal >= GPIO_IH_COUNT) - return EC_ERROR_INVAL; - - /* Write 1 to clear interrupt */ - STM32_EXTI_PR = g->mask; - - return EC_SUCCESS; -} - -/*****************************************************************************/ -/* Interrupt handler */ - -void __keep gpio_interrupt(void) -{ - int bit; - /* process only GPIO EXTINTs (EXTINT0..15) not other EXTINTs */ - uint32_t pending = STM32_EXTI_PR & 0xFFFF; - uint8_t signal; - - /* Write 1 to clear interrupt */ - STM32_EXTI_PR = pending; - - while (pending) { - bit = get_next_bit(&pending); - signal = exti_events[bit]; - if (signal < GPIO_IH_COUNT) - gpio_irq_handlers[signal](signal); - } -} -#ifdef CHIP_FAMILY_STM32F0 -DECLARE_IRQ(STM32_IRQ_EXTI0_1, gpio_interrupt, STM32_IRQ_EXT0_1_PRIORITY); -DECLARE_IRQ(STM32_IRQ_EXTI2_3, gpio_interrupt, STM32_IRQ_EXT2_3_PRIORITY); -DECLARE_IRQ(STM32_IRQ_EXTI4_15, gpio_interrupt, STM32_IRQ_EXTI4_15_PRIORITY); -#endif |