diff options
Diffstat (limited to 'chip/stm32/usart-stm32f0.c')
| -rw-r--r-- | chip/stm32/usart-stm32f0.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/chip/stm32/usart-stm32f0.c b/chip/stm32/usart-stm32f0.c deleted file mode 100644 index 908542146f..0000000000 --- a/chip/stm32/usart-stm32f0.c +++ /dev/null @@ -1,166 +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. - */ -#include "usart-stm32f0.h" - -#include "clock.h" -#include "common.h" -#include "compile_time_macros.h" -#include "hooks.h" -#include "registers.h" -#include "task.h" -#include "util.h" - -/* - * This configs array stores the currently active usart_config structure for - * each USART, an entry will be NULL if no USART driver is initialized for the - * corresponding hardware instance. - */ -#define STM32_USARTS_MAX 4 - -static struct usart_config const *configs[STM32_USARTS_MAX]; - -struct usart_configs usart_get_configs(void) -{ - return (struct usart_configs) {configs, ARRAY_SIZE(configs)}; -} - -static void usart_variant_enable(struct usart_config const *config) -{ - /* - * Make sure we register this config before enabling the HW. - * If we did it the other way around the FREQ_CHANGE hook could be - * called before we update the configs array and we would miss the - * clock frequency change event, leaving our baud rate divisor wrong. - */ - configs[config->hw->index] = config; - - usart_set_baud(config, config->baud); - - task_enable_irq(config->hw->irq); -} - -void usart_set_baud(struct usart_config const *config, int baud) -{ - usart_set_baud_f0_l(config, baud, clock_get_freq()); -} - -static void usart_variant_disable(struct usart_config const *config) -{ - int index = config->hw->index; - - /* - * Only disable the shared interrupt for USART3/4 if both USARTs are - * now disabled. - */ - if ((index == 0) || - (index == 1) || - (index == 2 && configs[3] == NULL) || - (index == 3 && configs[2] == NULL)) - task_disable_irq(config->hw->irq); - - configs[index] = NULL; -} - -static struct usart_hw_ops const usart_variant_hw_ops = { - .enable = usart_variant_enable, - .disable = usart_variant_disable, -}; - -static void freq_change(void) -{ - size_t i; - - for (i = 0; i < ARRAY_SIZE(configs); ++i) - if (configs[i]) - usart_set_baud_f0_l(configs[i], configs[i]->baud, - clock_get_freq()); -} - -DECLARE_HOOK(HOOK_FREQ_CHANGE, freq_change, HOOK_PRIO_DEFAULT); - -void usart_clear_tc(struct usart_config const *config) -{ - STM32_USART_ICR(config->hw->base) |= STM32_USART_ICR_TCCF; -} - -/* - * USART interrupt bindings. These functions can not be defined as static or - * they will be removed by the linker because of the way that DECLARE_IRQ works. - */ -#if defined(CONFIG_STREAM_USART1) -struct usart_hw_config const usart1_hw = { - .index = 0, - .base = STM32_USART1_BASE, - .irq = STM32_IRQ_USART1, - .clock_register = &STM32_RCC_APB2ENR, - .clock_enable = STM32_RCC_PB2_USART1, - .ops = &usart_variant_hw_ops, -}; - -void usart1_interrupt(void) -{ - usart_interrupt(configs[0]); -} - -DECLARE_IRQ(STM32_IRQ_USART1, usart1_interrupt, 2); -#endif - -#if defined(CONFIG_STREAM_USART2) -struct usart_hw_config const usart2_hw = { - .index = 1, - .base = STM32_USART2_BASE, - .irq = STM32_IRQ_USART2, - .clock_register = &STM32_RCC_APB1ENR, - .clock_enable = STM32_RCC_PB1_USART2, - .ops = &usart_variant_hw_ops, -}; - -void usart2_interrupt(void) -{ - usart_interrupt(configs[1]); -} - -DECLARE_IRQ(STM32_IRQ_USART2, usart2_interrupt, 2); -#endif - -#if defined(CONFIG_STREAM_USART3) -struct usart_hw_config const usart3_hw = { - .index = 2, - .base = STM32_USART3_BASE, - .irq = STM32_IRQ_USART3_4, - .clock_register = &STM32_RCC_APB1ENR, - .clock_enable = STM32_RCC_PB1_USART3, - .ops = &usart_variant_hw_ops, -}; -#endif - -#if defined(CONFIG_STREAM_USART4) -struct usart_hw_config const usart4_hw = { - .index = 3, - .base = STM32_USART4_BASE, - .irq = STM32_IRQ_USART3_4, - .clock_register = &STM32_RCC_APB1ENR, - .clock_enable = STM32_RCC_PB1_USART4, - .ops = &usart_variant_hw_ops, -}; -#endif - -#if defined(CONFIG_STREAM_USART3) || defined(CONFIG_STREAM_USART4) -void usart3_4_interrupt(void) -{ - /* - * This interrupt handler could be called with one of these configs - * not initialized, so we need to check here and only call the generic - * USART interrupt handler for initialized configs. - */ - if (configs[2]) - usart_interrupt(configs[2]); - - if (configs[3]) - usart_interrupt(configs[3]); -} - -DECLARE_IRQ(STM32_IRQ_USART3_4, usart3_4_interrupt, 2); -#endif |