174 lines
5.2 KiB
C
174 lines
5.2 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file STM32/sdc_lld.h
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* @brief STM32 SDC subsystem low level driver header.
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*
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* @addtogroup SDC
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* @{
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*/
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#ifndef _SDC_LLD_H_
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#define _SDC_LLD_H_
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#if HAL_USE_SDC || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief SDIO DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_SDC_SDIO_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_SDC_SDIO_DMA_PRIORITY 2
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#endif
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/**
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* @brief SDIO interrupt priority level setting.
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*/
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#if !defined(STM32_SDC_SDIO_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_SDC_SDIO_IRQ_PRIORITY 9
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#endif
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/**
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* @brief SDIO DMA error hook.
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* @note The default action for DMA errors is a system halt because DMA
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* error can only happen because programming errors.
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*/
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#if !defined(STM32_SDC_DMA_ERROR_HOOK) || defined(__DOXYGEN__)
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#define STM32_SDC_DMA_ERROR_HOOK(sdcp) chSysHalt()
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if !STM32_HAS_SDIO
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#error "SDIO not present in the selected device"
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#endif
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#if !defined(STM32_DMA_REQUIRED)
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#define STM32_DMA_REQUIRED
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#endif
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/*
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* SDIO clock divider.
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*/
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#if STM32_HCLK > 48000000
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#define STM32_SDIO_DIV_HS 0x01
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#define STM32_SDIO_DIV_LS 0xB2
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#else
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#define STM32_SDIO_DIV_HS 0x00
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#define STM32_SDIO_DIV_LS 0x76
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#endif
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Type of SDIO bus mode.
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*/
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typedef enum {
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SDC_MODE_1BIT = 0,
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SDC_MODE_4BIT,
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SDC_MODE_8BIT
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} sdcbusmode_t;
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/**
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* @brief Type of card flags.
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*/
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typedef uint32_t sdcmode_t;
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/**
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* @brief Type of a structure representing an SDC driver.
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*/
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typedef struct SDCDriver SDCDriver;
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct {
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uint32_t dummy;
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} SDCConfig;
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/**
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* @brief Structure representing an SDC driver.
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*/
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struct SDCDriver {
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/**
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* @brief Driver state.
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*/
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sdcstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const SDCConfig *config;
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/**
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* @brief Various flags regarding the mounted card.
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*/
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sdcmode_t cardmode;
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/* End of the mandatory fields.*/
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if !defined(__DOXYGEN__)
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extern SDCDriver SDCD1;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void sdc_lld_init(void);
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void sdc_lld_start(SDCDriver *sdcp);
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void sdc_lld_stop(SDCDriver *sdcp);
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void sdc_lld_start_clk(SDCDriver *sdcp);
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void sdc_lld_set_data_clk(SDCDriver *sdcp);
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void sdc_lld_stop_clk(SDCDriver *sdcp);
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void sdc_lld_set_bus_mode(SDCDriver *sdcp, sdcbusmode_t mode);
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void sdc_lld_send_cmd_none(SDCDriver *sdcp, uint8_t cmd, uint32_t arg);
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bool_t sdc_lld_send_cmd_short(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
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uint32_t *resp);
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bool_t sdc_lld_send_cmd_long(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
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uint32_t *resp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_SDC */
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#endif /* _SDC_LLD_H_ */
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/** @} */
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