267 lines
8.1 KiB
C
267 lines
8.1 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file STM32/SDMMCv1/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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* @name Configuration options
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* @{
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*/
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/**
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* @brief Support for unaligned transfers.
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* @note Unaligned transfers are much slower.
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*/
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#if !defined(STM32_SDC_SDMMC_UNALIGNED_SUPPORT) || defined(__DOXYGEN__)
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#define STM32_SDC_SDMMC_UNALIGNED_SUPPORT TRUE
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#endif
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/**
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* @brief Write timeout in milliseconds.
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*/
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#if !defined(STM32_SDC_SDMMC_WRITE_TIMEOUT) || defined(__DOXYGEN__)
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#define STM32_SDC_SDMMC_WRITE_TIMEOUT 250
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#endif
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/**
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* @brief Read timeout in milliseconds.
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*/
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#if !defined(STM32_SDC_SDMMC_READ_TIMEOUT) || defined(__DOXYGEN__)
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#define STM32_SDC_SDMMC_READ_TIMEOUT 25
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#endif
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/**
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* @brief Card clock activation delay in milliseconds.
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*/
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#if !defined(STM32_SDC_SDMMC_CLOCK_DELAY) || defined(__DOXYGEN__)
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#define STM32_SDC_SDMMC_CLOCK_DELAY 10
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#endif
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/**
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* @brief SDMMC1 DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_SDC_SDMMC1_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_SDC_SDMMC1_DMA_PRIORITY 3
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#endif
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/**
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* @brief SDMMC1 interrupt priority level setting.
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*/
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#if !defined(STM32_SDC_SDMMC1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_SDC_SDMMC1_IRQ_PRIORITY 9
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#endif
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/** @} */
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if STM32_SDC_USE_SDMMC1 && !STM32_HAS_SDMMC1
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#error "SDMMC1 not present in the selected device"
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#endif
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#if !STM32_SDC_USE_SDMMC1
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#error "SDC driver activated but no SDMMC peripheral assigned"
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#endif
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#if !OSAL_IRQ_IS_VALID_PRIORITY(STM32_SDC_SDMMC1_IRQ_PRIORITY)
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#error "Invalid IRQ priority assigned to SDIO"
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#endif
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#if !STM32_DMA_IS_VALID_PRIORITY(STM32_SDC_SDMMC1_DMA_PRIORITY)
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#error "Invalid DMA priority assigned to SDIO"
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#endif
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/* Check on the presence of the DMA streams settings in mcuconf.h.*/
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#if !defined(STM32_SDC_SDMMC1_DMA_STREAM)
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#error "SDMMC1 DMA streams not defined"
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#endif
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/* Check on the validity of the assigned DMA channels.*/
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#if !STM32_DMA_IS_VALID_ID(STM32_SDC_SDMMC1_DMA_STREAM, STM32_SDC_SDMMC1_DMA_MSK)
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#error "invalid DMA stream associated to SDMMC1"
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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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/* Driver data structures and types. */
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/*===========================================================================*/
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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 SDC Driver condition flags type.
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*/
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typedef uint32_t sdcflags_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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/**
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* @brief Working area for memory consuming operations.
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* @note Buffer must be word aligned and big enough to store 512 bytes.
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* @note It is mandatory for detecting MMC cards bigger than 2GB else it
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* can be @p NULL. SD cards do NOT need it.
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* @note Memory pointed by this buffer is only used by @p sdcConnect(),
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* afterward it can be reused for other purposes.
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*/
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uint8_t *scratchpad;
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/**
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* @brief Bus width.
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*/
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sdcbusmode_t bus_width;
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/* End of the mandatory fields.*/
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} SDCConfig;
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/**
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* @brief @p SDCDriver specific methods.
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*/
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#define _sdc_driver_methods \
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_mmcsd_block_device_methods
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/**
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* @extends MMCSDBlockDeviceVMT
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*
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* @brief @p SDCDriver virtual methods table.
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*/
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struct SDCDriverVMT {
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_sdc_driver_methods
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};
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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 Virtual Methods Table.
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*/
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const struct SDCDriverVMT *vmt;
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_mmcsd_block_device_data
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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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/**
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* @brief Errors flags.
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*/
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sdcflags_t errors;
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/**
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* @brief Card RCA.
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*/
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uint32_t rca;
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/* End of the mandatory fields.*/
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/**
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* @brief Thread waiting for I/O completion IRQ.
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*/
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thread_reference_t thread;
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/**
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* @brief DMA mode bit mask.
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*/
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uint32_t dmamode;
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/**
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* @brief Transmit DMA channel.
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*/
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const stm32_dma_stream_t *dma;
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/**
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* @brief Pointer to the SDMMC registers block.
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* @note Needed for debugging aid.
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*/
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SDMMC_TypeDef *sdmmc;
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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, sdcbusclk_t clk);
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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 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 sdc_lld_send_cmd_short_crc(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
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uint32_t *resp);
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bool sdc_lld_send_cmd_long_crc(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
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uint32_t *resp);
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bool sdc_lld_read_special(SDCDriver *sdcp, uint8_t *buf, size_t bytes,
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uint8_t cmd, uint32_t argument);
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bool sdc_lld_read(SDCDriver *sdcp, uint32_t startblk,
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uint8_t *buf, uint32_t blocks);
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bool sdc_lld_write(SDCDriver *sdcp, uint32_t startblk,
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const uint8_t *buf, uint32_t blocks);
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bool sdc_lld_sync(SDCDriver *sdcp);
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bool sdc_lld_is_card_inserted(SDCDriver *sdcp);
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bool sdc_lld_is_write_protected(SDCDriver *sdcp);
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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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