062a8535ec
This change adds SD/MMC support at block level, by porting the SD/MMC driver. Signed-off-by: Benoît Thébaudeau <benoit@wsystem.com>
140 lines
4.4 KiB
C
140 lines
4.4 KiB
C
/*
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* Copyright (c) 2016, Benoît Thébaudeau <benoit@wsystem.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup mmc-arch
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* @{
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*
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* \file
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* Implementation of the SD/MMC device driver RE-Mote-specific definitions.
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*/
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#include <stddef.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include "spi-arch.h"
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#include "dev/ioc.h"
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#include "dev/gpio.h"
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#include "dev/spi.h"
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#include "mmc-arch.h"
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#define USD_SEL_PORT_BASE GPIO_PORT_TO_BASE(USD_SEL_PORT)
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#define USD_SEL_PIN_MASK GPIO_PIN_MASK(USD_SEL_PIN)
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/*----------------------------------------------------------------------------*/
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static void
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mmc_arch_init(void)
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{
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static uint8_t init_done;
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if(init_done) {
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return;
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}
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GPIO_SET_INPUT(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
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GPIO_SOFTWARE_CONTROL(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
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ioc_set_over(USD_SEL_PORT, USD_SEL_PIN, IOC_OVERRIDE_DIS);
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spix_cs_init(USD_CSN_PORT, USD_CSN_PIN);
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spix_init(USD_SPI_INSTANCE);
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spix_set_mode(USD_SPI_INSTANCE, SSI_CR0_FRF_MOTOROLA, 0, 0, 8);
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init_done = 1;
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}
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/*----------------------------------------------------------------------------*/
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bool
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mmc_arch_get_cd(uint8_t dev)
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{
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mmc_arch_init();
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if(GPIO_IS_OUTPUT(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK)) {
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/* Card previously detected and powered */
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return true;
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} else if(GPIO_READ_PIN(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK)) {
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/* Card inserted -> power it */
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GPIO_SET_OUTPUT(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
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GPIO_CLR_PIN(USD_SEL_PORT_BASE, USD_SEL_PIN_MASK);
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return true;
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} else {
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/* No card detected */
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return false;
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}
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}
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/*----------------------------------------------------------------------------*/
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bool
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mmc_arch_get_wp(uint8_t dev)
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{
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return false;
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}
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/*----------------------------------------------------------------------------*/
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void
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mmc_arch_spi_select(uint8_t dev, bool sel)
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{
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if(sel) {
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SPIX_CS_CLR(USD_CSN_PORT, USD_CSN_PIN);
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} else {
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SPIX_CS_SET(USD_CSN_PORT, USD_CSN_PIN);
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}
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}
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/*----------------------------------------------------------------------------*/
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void
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mmc_arch_spi_set_clock_freq(uint8_t dev, uint32_t freq)
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{
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spix_set_clock_freq(USD_SPI_INSTANCE, freq);
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}
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/*----------------------------------------------------------------------------*/
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void
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mmc_arch_spi_xfer(uint8_t dev, const void *tx_buf, size_t tx_cnt,
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void *rx_buf, size_t rx_cnt)
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{
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const uint8_t *tx_buf_u8 = tx_buf;
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uint8_t *rx_buf_u8 = rx_buf;
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while(tx_cnt || rx_cnt) {
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SPIX_WAITFORTxREADY(USD_SPI_INSTANCE);
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if(tx_cnt) {
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SPIX_BUF(USD_SPI_INSTANCE) = *tx_buf_u8++;
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tx_cnt--;
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} else {
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SPIX_BUF(USD_SPI_INSTANCE) = 0;
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}
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SPIX_WAITFOREOTx(USD_SPI_INSTANCE);
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SPIX_WAITFOREORx(USD_SPI_INSTANCE);
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if(rx_cnt) {
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*rx_buf_u8++ = SPIX_BUF(USD_SPI_INSTANCE);
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rx_cnt--;
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} else {
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SPIX_BUF(USD_SPI_INSTANCE);
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}
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}
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}
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/*----------------------------------------------------------------------------*/
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/** @} */
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