mmc.c

/*
 * Copyright 2008, Freescale Semiconductor, Inc
 * Andy Fleming
 *
 * Based vaguely on the Linux code
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <config.h>
#include <common.h>
#include <command.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <errno.h>
#include <mmc.h>
#include <part.h>
#include <malloc.h>
#include <memalign.h>
#include <linux/list.h>
#include <div64.h>
#include "mmc_private.h"

__weak int board_mmc_getwp(struct mmc *mmc)
{
	return -1;
}

int mmc_getwp(struct mmc *mmc)
{
	int wp;

	wp = board_mmc_getwp(mmc);

	if (wp < 0) {
		if (mmc->cfg->ops->getwp)
			wp = mmc->cfg->ops->getwp(mmc);
		else
			wp = 0;
	}

	return wp;
}

__weak int board_mmc_getcd(struct mmc *mmc)
{
	return -1;
}

int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
	int ret;

#ifdef CONFIG_MMC_TRACE
	int i;
	u8 *ptr;

	printf("CMD_SEND:%d\n", cmd->cmdidx);
	printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
	ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
	if (ret) {
		printf("\t\tRET\t\t\t %d\n", ret);
	} else {
		switch (cmd->resp_type) {
		case MMC_RSP_NONE:
			printf("\t\tMMC_RSP_NONE\n");
			break;
		case MMC_RSP_R1:
			printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
				cmd->response[0]);
			break;
		case MMC_RSP_R1b:
			printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
				cmd->response[0]);
			break;
		case MMC_RSP_R2:
			printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
				cmd->response[0]);
			printf("\t\t          \t\t 0x%08X \n",
				cmd->response[1]);
			printf("\t\t          \t\t 0x%08X \n",
				cmd->response[2]);
			printf("\t\t          \t\t 0x%08X \n",
				cmd->response[3]);
			printf("\n");
			printf("\t\t\t\t\tDUMPING DATA\n");
			for (i = 0; i < 4; i++) {
				int j;
				printf("\t\t\t\t\t%03d - ", i*4);
				ptr = (u8 *)&cmd->response[i];
				ptr += 3;
				for (j = 0; j < 4; j++)
					printf("%02X ", *ptr--);
				printf("\n");
			}
			break;
		case MMC_RSP_R3:
			printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
				cmd->response[0]);
			break;
		default:
			printf("\t\tERROR MMC rsp not supported\n");
			break;
		}
	}
#else
	ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
#endif
	return ret;
}

int mmc_send_status(struct mmc *mmc, int timeout)
{
	struct mmc_cmd cmd;
	int err, retries = 5;
#ifdef CONFIG_MMC_TRACE
	int status;
#endif

	cmd.cmdidx = MMC_CMD_SEND_STATUS;
	cmd.resp_type = MMC_RSP_R1;
	if (!mmc_host_is_spi(mmc))
		cmd.cmdarg = mmc->rca << 16;

	while (1) {
		err = mmc_send_cmd(mmc, &cmd, NULL);
		if (!err) {
			if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
			    (cmd.response[0] & MMC_STATUS_CURR_STATE) !=
			     MMC_STATE_PRG)
				break;
			else if (cmd.response[0] & MMC_STATUS_MASK) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
				printf("Status Error: 0x%08X\n",
					cmd.response[0]);
#endif
				return COMM_ERR;
			}
		} else if (--retries < 0)
			return err;

		if (timeout-- <= 0)
			break;

		udelay(1000);
	}

#ifdef CONFIG_MMC_TRACE
	status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
	printf("CURR STATE:%d\n", status);
#endif
	if (timeout <= 0) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
		printf("Timeout waiting card ready\n");
#endif
		return TIMEOUT;
	}

	return 0;
}

int mmc_set_blocklen(struct mmc *mmc, int len)
{
	struct mmc_cmd cmd;

	if (mmc->ddr_mode)
		return 0;

	cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
	cmd.resp_type = MMC_RSP_R1;
	cmd.cmdarg = len;

	return mmc_send_cmd(mmc, &cmd, NULL);
}

static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
			   lbaint_t blkcnt)
{
	struct mmc_cmd cmd;
	struct mmc_data data;

	if (blkcnt > 1)
		cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
	else
		cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;

	if (mmc->high_capacity)
		cmd.cmdarg = start;
	else
		cmd.cmdarg = start * mmc->read_bl_len;

	cmd.resp_type = MMC_RSP_R1;

	data.dest = dst;
	data.blocks = blkcnt;
	data.blocksize = mmc->read_bl_len;
	data.flags = MMC_DATA_READ;

	if (mmc_send_cmd(mmc, &cmd, &data))
		return 0;