738 lines
15 KiB
C
738 lines
15 KiB
C
/*
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* Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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/* Define a simple and generic interface to access eMMC and SD-card devices. */
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <string.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <drivers/delay_timer.h>
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#include <drivers/mmc.h>
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#include <lib/utils.h>
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#define MMC_DEFAULT_MAX_RETRIES 5
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#define SEND_OP_COND_MAX_RETRIES 100
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#define MULT_BY_512K_SHIFT 19
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static const struct mmc_ops *ops;
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static unsigned int mmc_ocr_value;
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static struct mmc_csd_emmc mmc_csd;
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static unsigned char mmc_ext_csd[512] __aligned(16);
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static unsigned int mmc_flags;
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static struct mmc_device_info *mmc_dev_info;
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static unsigned int rca;
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static unsigned int scr[2]__aligned(16) = { 0 };
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static const unsigned char tran_speed_base[16] = {
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0, 10, 12, 13, 15, 20, 26, 30, 35, 40, 45, 52, 55, 60, 70, 80
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};
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static const unsigned char sd_tran_speed_base[16] = {
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0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80
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};
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static bool is_cmd23_enabled(void)
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{
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return ((mmc_flags & MMC_FLAG_CMD23) != 0U);
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}
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static int mmc_send_cmd(unsigned int idx, unsigned int arg,
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unsigned int r_type, unsigned int *r_data)
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{
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struct mmc_cmd cmd;
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int ret;
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zeromem(&cmd, sizeof(struct mmc_cmd));
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cmd.cmd_idx = idx;
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cmd.cmd_arg = arg;
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cmd.resp_type = r_type;
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ret = ops->send_cmd(&cmd);
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if ((ret == 0) && (r_data != NULL)) {
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int i;
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for (i = 0; i < 4; i++) {
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*r_data = cmd.resp_data[i];
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r_data++;
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}
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}
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if (ret != 0) {
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VERBOSE("Send command %u error: %d\n", idx, ret);
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}
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return ret;
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}
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static int mmc_device_state(void)
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{
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int retries = MMC_DEFAULT_MAX_RETRIES;
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unsigned int resp_data[4];
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do {
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int ret;
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if (retries == 0) {
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ERROR("CMD13 failed after %d retries\n",
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MMC_DEFAULT_MAX_RETRIES);
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return -EIO;
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}
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ret = mmc_send_cmd(MMC_CMD(13), rca << RCA_SHIFT_OFFSET,
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MMC_RESPONSE_R1, &resp_data[0]);
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if (ret != 0) {
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retries--;
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continue;
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}
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if ((resp_data[0] & STATUS_SWITCH_ERROR) != 0U) {
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return -EIO;
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}
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retries--;
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} while ((resp_data[0] & STATUS_READY_FOR_DATA) == 0U);
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return MMC_GET_STATE(resp_data[0]);
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}
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static int mmc_set_ext_csd(unsigned int ext_cmd, unsigned int value)
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{
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int ret;
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ret = mmc_send_cmd(MMC_CMD(6),
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EXTCSD_WRITE_BYTES | EXTCSD_CMD(ext_cmd) |
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EXTCSD_VALUE(value) | EXTCSD_CMD_SET_NORMAL,
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MMC_RESPONSE_R1B, NULL);
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if (ret != 0) {
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return ret;
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}
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do {
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ret = mmc_device_state();
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if (ret < 0) {
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return ret;
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}
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} while (ret == MMC_STATE_PRG);
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return 0;
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}
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static int mmc_sd_switch(unsigned int bus_width)
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{
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int ret;
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int retries = MMC_DEFAULT_MAX_RETRIES;
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unsigned int bus_width_arg = 0;
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ret = ops->prepare(0, (uintptr_t)&scr, sizeof(scr));
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if (ret != 0) {
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return ret;
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}
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/* CMD55: Application Specific Command */
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ret = mmc_send_cmd(MMC_CMD(55), rca << RCA_SHIFT_OFFSET,
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MMC_RESPONSE_R5, NULL);
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if (ret != 0) {
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return ret;
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}
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/* ACMD51: SEND_SCR */
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do {
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ret = mmc_send_cmd(MMC_ACMD(51), 0, MMC_RESPONSE_R1, NULL);
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if ((ret != 0) && (retries == 0)) {
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ERROR("ACMD51 failed after %d retries (ret=%d)\n",
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MMC_DEFAULT_MAX_RETRIES, ret);
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return ret;
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}
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retries--;
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} while (ret != 0);
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ret = ops->read(0, (uintptr_t)&scr, sizeof(scr));
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if (ret != 0) {
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return ret;
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}
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if (((scr[0] & SD_SCR_BUS_WIDTH_4) != 0U) &&
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(bus_width == MMC_BUS_WIDTH_4)) {
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bus_width_arg = 2;
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}
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/* CMD55: Application Specific Command */
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ret = mmc_send_cmd(MMC_CMD(55), rca << RCA_SHIFT_OFFSET,
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MMC_RESPONSE_R5, NULL);
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if (ret != 0) {
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return ret;
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}
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/* ACMD6: SET_BUS_WIDTH */
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ret = mmc_send_cmd(MMC_ACMD(6), bus_width_arg, MMC_RESPONSE_R1, NULL);
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if (ret != 0) {
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return ret;
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}
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do {
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ret = mmc_device_state();
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if (ret < 0) {
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return ret;
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}
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} while (ret == MMC_STATE_PRG);
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return 0;
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}
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static int mmc_set_ios(unsigned int clk, unsigned int bus_width)
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{
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int ret;
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unsigned int width = bus_width;
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if (mmc_dev_info->mmc_dev_type != MMC_IS_EMMC) {
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if (width == MMC_BUS_WIDTH_8) {
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WARN("Wrong bus config for SD-card, force to 4\n");
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width = MMC_BUS_WIDTH_4;
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}
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ret = mmc_sd_switch(width);
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if (ret != 0) {
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return ret;
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}
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} else if (mmc_csd.spec_vers == 4U) {
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ret = mmc_set_ext_csd(CMD_EXTCSD_BUS_WIDTH,
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(unsigned int)width);
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if (ret != 0) {
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return ret;
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}
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} else {
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VERBOSE("Wrong MMC type or spec version\n");
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}
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return ops->set_ios(clk, width);
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}
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static int mmc_fill_device_info(void)
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{
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unsigned long long c_size;
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unsigned int speed_idx;
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unsigned int nb_blocks;
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unsigned int freq_unit;
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int ret = 0;
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struct mmc_csd_sd_v2 *csd_sd_v2;
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switch (mmc_dev_info->mmc_dev_type) {
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case MMC_IS_EMMC:
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mmc_dev_info->block_size = MMC_BLOCK_SIZE;
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ret = ops->prepare(0, (uintptr_t)&mmc_ext_csd,
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sizeof(mmc_ext_csd));
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if (ret != 0) {
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return ret;
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}
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/* MMC CMD8: SEND_EXT_CSD */
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ret = mmc_send_cmd(MMC_CMD(8), 0, MMC_RESPONSE_R1, NULL);
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if (ret != 0) {
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return ret;
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}
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ret = ops->read(0, (uintptr_t)&mmc_ext_csd,
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sizeof(mmc_ext_csd));
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if (ret != 0) {
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return ret;
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}
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do {
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ret = mmc_device_state();
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if (ret < 0) {
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return ret;
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}
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} while (ret != MMC_STATE_TRAN);
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nb_blocks = (mmc_ext_csd[CMD_EXTCSD_SEC_CNT] << 0) |
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(mmc_ext_csd[CMD_EXTCSD_SEC_CNT + 1] << 8) |
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(mmc_ext_csd[CMD_EXTCSD_SEC_CNT + 2] << 16) |
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(mmc_ext_csd[CMD_EXTCSD_SEC_CNT + 3] << 24);
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mmc_dev_info->device_size = (unsigned long long)nb_blocks *
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mmc_dev_info->block_size;
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break;
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case MMC_IS_SD:
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/*
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* Use the same mmc_csd struct, as required fields here
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* (READ_BL_LEN, C_SIZE, CSIZE_MULT) are common with eMMC.
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*/
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mmc_dev_info->block_size = BIT_32(mmc_csd.read_bl_len);
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c_size = ((unsigned long long)mmc_csd.c_size_high << 2U) |
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(unsigned long long)mmc_csd.c_size_low;
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assert(c_size != 0xFFFU);
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mmc_dev_info->device_size = (c_size + 1U) *
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BIT_64(mmc_csd.c_size_mult + 2U) *
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mmc_dev_info->block_size;
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break;
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case MMC_IS_SD_HC:
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assert(mmc_csd.csd_structure == 1U);
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mmc_dev_info->block_size = MMC_BLOCK_SIZE;
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/* Need to use mmc_csd_sd_v2 struct */
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csd_sd_v2 = (struct mmc_csd_sd_v2 *)&mmc_csd;
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c_size = ((unsigned long long)csd_sd_v2->c_size_high << 16) |
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(unsigned long long)csd_sd_v2->c_size_low;
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mmc_dev_info->device_size = (c_size + 1U) << MULT_BY_512K_SHIFT;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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if (ret < 0) {
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return ret;
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}
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speed_idx = (mmc_csd.tran_speed & CSD_TRAN_SPEED_MULT_MASK) >>
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CSD_TRAN_SPEED_MULT_SHIFT;
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assert(speed_idx > 0U);
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if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
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mmc_dev_info->max_bus_freq = tran_speed_base[speed_idx];
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} else {
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mmc_dev_info->max_bus_freq = sd_tran_speed_base[speed_idx];
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}
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freq_unit = mmc_csd.tran_speed & CSD_TRAN_SPEED_UNIT_MASK;
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while (freq_unit != 0U) {
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mmc_dev_info->max_bus_freq *= 10U;
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--freq_unit;
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}
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mmc_dev_info->max_bus_freq *= 10000U;
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return 0;
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}
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static int sd_send_op_cond(void)
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{
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int n;
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unsigned int resp_data[4];
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for (n = 0; n < SEND_OP_COND_MAX_RETRIES; n++) {
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int ret;
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/* CMD55: Application Specific Command */
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ret = mmc_send_cmd(MMC_CMD(55), 0, MMC_RESPONSE_R1, NULL);
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if (ret != 0) {
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return ret;
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}
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/* ACMD41: SD_SEND_OP_COND */
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ret = mmc_send_cmd(MMC_ACMD(41), OCR_HCS |
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mmc_dev_info->ocr_voltage, MMC_RESPONSE_R3,
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&resp_data[0]);
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if (ret != 0) {
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return ret;
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}
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if ((resp_data[0] & OCR_POWERUP) != 0U) {
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mmc_ocr_value = resp_data[0];
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if ((mmc_ocr_value & OCR_HCS) != 0U) {
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mmc_dev_info->mmc_dev_type = MMC_IS_SD_HC;
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} else {
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mmc_dev_info->mmc_dev_type = MMC_IS_SD;
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}
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return 0;
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}
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mdelay(1);
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}
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ERROR("ACMD41 failed after %d retries\n", SEND_OP_COND_MAX_RETRIES);
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return -EIO;
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}
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static int mmc_reset_to_idle(void)
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{
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int ret;
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/* CMD0: reset to IDLE */
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ret = mmc_send_cmd(MMC_CMD(0), 0, 0, NULL);
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if (ret != 0) {
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return ret;
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}
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mdelay(2);
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return 0;
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}
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static int mmc_send_op_cond(void)
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{
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int ret, n;
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unsigned int resp_data[4];
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ret = mmc_reset_to_idle();
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if (ret != 0) {
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return ret;
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};
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for (n = 0; n < SEND_OP_COND_MAX_RETRIES; n++) {
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ret = mmc_send_cmd(MMC_CMD(1), OCR_SECTOR_MODE |
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OCR_VDD_MIN_2V7 | OCR_VDD_MIN_1V7,
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MMC_RESPONSE_R3, &resp_data[0]);
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if (ret != 0) {
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return ret;
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}
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if ((resp_data[0] & OCR_POWERUP) != 0U) {
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mmc_ocr_value = resp_data[0];
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return 0;
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}
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mdelay(10);
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}
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ERROR("CMD1 failed after %d retries\n", SEND_OP_COND_MAX_RETRIES);
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return -EIO;
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}
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static int mmc_enumerate(unsigned int clk, unsigned int bus_width)
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{
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int ret;
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unsigned int resp_data[4];
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ops->init();
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ret = mmc_reset_to_idle();
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if (ret != 0) {
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return ret;
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};
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if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
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ret = mmc_send_op_cond();
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} else {
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/* CMD8: Send Interface Condition Command */
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ret = mmc_send_cmd(MMC_CMD(8), VHS_2_7_3_6_V | CMD8_CHECK_PATTERN,
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MMC_RESPONSE_R5, &resp_data[0]);
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if ((ret == 0) && ((resp_data[0] & 0xffU) == CMD8_CHECK_PATTERN)) {
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ret = sd_send_op_cond();
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}
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}
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if (ret != 0) {
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return ret;
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}
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/* CMD2: Card Identification */
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ret = mmc_send_cmd(MMC_CMD(2), 0, MMC_RESPONSE_R2, NULL);
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if (ret != 0) {
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return ret;
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}
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/* CMD3: Set Relative Address */
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if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
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rca = MMC_FIX_RCA;
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ret = mmc_send_cmd(MMC_CMD(3), rca << RCA_SHIFT_OFFSET,
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MMC_RESPONSE_R1, NULL);
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if (ret != 0) {
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return ret;
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}
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} else {
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ret = mmc_send_cmd(MMC_CMD(3), 0,
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MMC_RESPONSE_R6, &resp_data[0]);
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if (ret != 0) {
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return ret;
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}
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rca = (resp_data[0] & 0xFFFF0000U) >> 16;
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}
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/* CMD9: CSD Register */
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ret = mmc_send_cmd(MMC_CMD(9), rca << RCA_SHIFT_OFFSET,
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MMC_RESPONSE_R2, &resp_data[0]);
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if (ret != 0) {
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return ret;
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}
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memcpy(&mmc_csd, &resp_data, sizeof(resp_data));
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/* CMD7: Select Card */
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ret = mmc_send_cmd(MMC_CMD(7), rca << RCA_SHIFT_OFFSET,
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MMC_RESPONSE_R1, NULL);
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if (ret != 0) {
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return ret;
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}
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do {
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ret = mmc_device_state();
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if (ret < 0) {
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return ret;
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}
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} while (ret != MMC_STATE_TRAN);
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ret = mmc_set_ios(clk, bus_width);
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if (ret != 0) {
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return ret;
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}
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return mmc_fill_device_info();
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}
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size_t mmc_read_blocks(int lba, uintptr_t buf, size_t size)
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{
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int ret;
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unsigned int cmd_idx, cmd_arg;
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assert((ops != NULL) &&
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(ops->read != NULL) &&
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(size != 0U) &&
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((size & MMC_BLOCK_MASK) == 0U));
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ret = ops->prepare(lba, buf, size);
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if (ret != 0) {
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return 0;
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}
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if (is_cmd23_enabled()) {
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/* Set block count */
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ret = mmc_send_cmd(MMC_CMD(23), size / MMC_BLOCK_SIZE,
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MMC_RESPONSE_R1, NULL);
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if (ret != 0) {
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return 0;
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}
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cmd_idx = MMC_CMD(18);
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} else {
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if (size > MMC_BLOCK_SIZE) {
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cmd_idx = MMC_CMD(18);
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} else {
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cmd_idx = MMC_CMD(17);
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}
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}
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if (((mmc_ocr_value & OCR_ACCESS_MODE_MASK) == OCR_BYTE_MODE) &&
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(mmc_dev_info->mmc_dev_type != MMC_IS_SD_HC)) {
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cmd_arg = lba * MMC_BLOCK_SIZE;
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} else {
|
|
cmd_arg = lba;
|
|
}
|
|
|
|
ret = mmc_send_cmd(cmd_idx, cmd_arg, MMC_RESPONSE_R1, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
ret = ops->read(lba, buf, size);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
/* Wait buffer empty */
|
|
do {
|
|
ret = mmc_device_state();
|
|
if (ret < 0) {
|
|
return 0;
|
|
}
|
|
} while ((ret != MMC_STATE_TRAN) && (ret != MMC_STATE_DATA));
|
|
|
|
if (!is_cmd23_enabled() && (size > MMC_BLOCK_SIZE)) {
|
|
ret = mmc_send_cmd(MMC_CMD(12), 0, MMC_RESPONSE_R1B, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
size_t mmc_write_blocks(int lba, const uintptr_t buf, size_t size)
|
|
{
|
|
int ret;
|
|
unsigned int cmd_idx, cmd_arg;
|
|
|
|
assert((ops != NULL) &&
|
|
(ops->write != NULL) &&
|
|
(size != 0U) &&
|
|
((buf & MMC_BLOCK_MASK) == 0U) &&
|
|
((size & MMC_BLOCK_MASK) == 0U));
|
|
|
|
ret = ops->prepare(lba, buf, size);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
if (is_cmd23_enabled()) {
|
|
/* Set block count */
|
|
ret = mmc_send_cmd(MMC_CMD(23), size / MMC_BLOCK_SIZE,
|
|
MMC_RESPONSE_R1, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
cmd_idx = MMC_CMD(25);
|
|
} else {
|
|
if (size > MMC_BLOCK_SIZE) {
|
|
cmd_idx = MMC_CMD(25);
|
|
} else {
|
|
cmd_idx = MMC_CMD(24);
|
|
}
|
|
}
|
|
|
|
if ((mmc_ocr_value & OCR_ACCESS_MODE_MASK) == OCR_BYTE_MODE) {
|
|
cmd_arg = lba * MMC_BLOCK_SIZE;
|
|
} else {
|
|
cmd_arg = lba;
|
|
}
|
|
|
|
ret = mmc_send_cmd(cmd_idx, cmd_arg, MMC_RESPONSE_R1, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
ret = ops->write(lba, buf, size);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
/* Wait buffer empty */
|
|
do {
|
|
ret = mmc_device_state();
|
|
if (ret < 0) {
|
|
return 0;
|
|
}
|
|
} while ((ret != MMC_STATE_TRAN) && (ret != MMC_STATE_RCV));
|
|
|
|
if (!is_cmd23_enabled() && (size > MMC_BLOCK_SIZE)) {
|
|
ret = mmc_send_cmd(MMC_CMD(12), 0, MMC_RESPONSE_R1B, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
size_t mmc_erase_blocks(int lba, size_t size)
|
|
{
|
|
int ret;
|
|
|
|
assert(ops != NULL);
|
|
assert((size != 0U) && ((size & MMC_BLOCK_MASK) == 0U));
|
|
|
|
ret = mmc_send_cmd(MMC_CMD(35), lba, MMC_RESPONSE_R1, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
ret = mmc_send_cmd(MMC_CMD(36), lba + (size / MMC_BLOCK_SIZE) - 1U,
|
|
MMC_RESPONSE_R1, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
ret = mmc_send_cmd(MMC_CMD(38), lba, MMC_RESPONSE_R1B, NULL);
|
|
if (ret != 0) {
|
|
return 0;
|
|
}
|
|
|
|
do {
|
|
ret = mmc_device_state();
|
|
if (ret < 0) {
|
|
return 0;
|
|
}
|
|
} while (ret != MMC_STATE_TRAN);
|
|
|
|
return size;
|
|
}
|
|
|
|
static inline void mmc_rpmb_enable(void)
|
|
{
|
|
mmc_set_ext_csd(CMD_EXTCSD_PARTITION_CONFIG,
|
|
PART_CFG_BOOT_PARTITION1_ENABLE |
|
|
PART_CFG_PARTITION1_ACCESS);
|
|
}
|
|
|
|
static inline void mmc_rpmb_disable(void)
|
|
{
|
|
mmc_set_ext_csd(CMD_EXTCSD_PARTITION_CONFIG,
|
|
PART_CFG_BOOT_PARTITION1_ENABLE);
|
|
}
|
|
|
|
size_t mmc_rpmb_read_blocks(int lba, uintptr_t buf, size_t size)
|
|
{
|
|
size_t size_read;
|
|
|
|
mmc_rpmb_enable();
|
|
size_read = mmc_read_blocks(lba, buf, size);
|
|
mmc_rpmb_disable();
|
|
|
|
return size_read;
|
|
}
|
|
|
|
size_t mmc_rpmb_write_blocks(int lba, const uintptr_t buf, size_t size)
|
|
{
|
|
size_t size_written;
|
|
|
|
mmc_rpmb_enable();
|
|
size_written = mmc_write_blocks(lba, buf, size);
|
|
mmc_rpmb_disable();
|
|
|
|
return size_written;
|
|
}
|
|
|
|
size_t mmc_rpmb_erase_blocks(int lba, size_t size)
|
|
{
|
|
size_t size_erased;
|
|
|
|
mmc_rpmb_enable();
|
|
size_erased = mmc_erase_blocks(lba, size);
|
|
mmc_rpmb_disable();
|
|
|
|
return size_erased;
|
|
}
|
|
|
|
int mmc_init(const struct mmc_ops *ops_ptr, unsigned int clk,
|
|
unsigned int width, unsigned int flags,
|
|
struct mmc_device_info *device_info)
|
|
{
|
|
assert((ops_ptr != NULL) &&
|
|
(ops_ptr->init != NULL) &&
|
|
(ops_ptr->send_cmd != NULL) &&
|
|
(ops_ptr->set_ios != NULL) &&
|
|
(ops_ptr->prepare != NULL) &&
|
|
(ops_ptr->read != NULL) &&
|
|
(ops_ptr->write != NULL) &&
|
|
(device_info != NULL) &&
|
|
(clk != 0) &&
|
|
((width == MMC_BUS_WIDTH_1) ||
|
|
(width == MMC_BUS_WIDTH_4) ||
|
|
(width == MMC_BUS_WIDTH_8) ||
|
|
(width == MMC_BUS_WIDTH_DDR_4) ||
|
|
(width == MMC_BUS_WIDTH_DDR_8)));
|
|
|
|
ops = ops_ptr;
|
|
mmc_flags = flags;
|
|
mmc_dev_info = device_info;
|
|
|
|
return mmc_enumerate(clk, width);
|
|
}
|