path: root/drivers/mmc/core/mmc_ops.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  linux/drivers/mmc/core/mmc_ops.h
 *
 *  Copyright 2006-2007 Pierre Ossman
 */

#include <linux/slab.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/scatterlist.h>

#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/mmc/mmc.h>

#include "core.h"
#include "card.h"
#include "host.h"
#include "mmc_ops.h"

#define MMC_BKOPS_TIMEOUT_MS		(120 * 1000) /* 120s */
#define MMC_SANITIZE_TIMEOUT_MS		(240 * 1000) /* 240s */
#define MMC_OP_COND_PERIOD_US		(4 * 1000) /* 4ms */
#define MMC_OP_COND_TIMEOUT_MS		1000 /* 1s */

static const u8 tuning_blk_pattern_4bit[] = {
	0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
	0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
	0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
	0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
	0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
	0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
	0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
	0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
};

static const u8 tuning_blk_pattern_8bit[] = {
	0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
	0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
	0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
	0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
	0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
	0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
	0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
	0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
	0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
	0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
	0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
	0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
	0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
	0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
	0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
	0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
};

struct mmc_busy_data {
	struct mmc_card *card;
	bool retry_crc_err;
	enum mmc_busy_cmd busy_cmd;
};

struct mmc_op_cond_busy_data {
	struct mmc_host *host;
	u32 ocr;
	struct mmc_command *cmd;
};

int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
{
	int err;
	struct mmc_command cmd = {};

	cmd.opcode = MMC_SEND_STATUS;
	if (!mmc_host_is_spi(card->host))
		cmd.arg = card->rca << 16;
	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;

	err = mmc_wait_for_cmd(card->host, &cmd, retries);
	if (err)
		return err;

	/* NOTE: callers are required to understand the difference
	 * between "native" and SPI format status words!
	 */
	if (status)
		*status = cmd.resp[0];

	return 0;
}
EXPORT_SYMBOL_GPL(__mmc_send_status);

int mmc_send_status(struct mmc_card *card, u32 *status)
{
	return __mmc_send_status(card, status, MMC_CMD_RETRIES);
}
EXPORT_SYMBOL_GPL(mmc_send_status);

static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
{
	struct mmc_command cmd = {};

	cmd.opcode = MMC_SELECT_CARD;

	if (card) {
		cmd.arg = card->rca << 16;
		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
	} else {
		cmd.arg = 0;
		cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
	}

	return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
}

int mmc_select_card(struct mmc_card *card)
{

	return _mmc_select_card(card->host, card);
}

int mmc_deselect_cards(struct mmc_host *host)
{
	return _mmc_select_card(host, NULL);
}

/*
 * Write the value specified in the device tree or board code into the optional
 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and