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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <log.h>
#include <malloc.h>
#include <mmc.h>
#include <os.h>
#include <asm/test.h>
struct sandbox_mmc_plat {
struct mmc_config cfg;
struct mmc mmc;
const char *fname;
};
#define MMC_CMULT 8 /* 8 because the card is high-capacity */
#define MMC_BL_LEN_SHIFT 10
#define MMC_BL_LEN BIT(MMC_BL_LEN_SHIFT)
/* Granularity of priv->csize - this is 1MB */
#define SIZE_MULTIPLE ((1 << (MMC_CMULT + 2)) * MMC_BL_LEN)
struct sandbox_mmc_priv {
char *buf;
int csize; /* CSIZE value to report */
int size;
};
/**
* sandbox_mmc_send_cmd() - Emulate SD commands
*
* This emulate an SD card version 2. Single-block reads result in zero data.
* Multiple-block reads return a test string.
*/
static int sandbox_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct sandbox_mmc_priv *priv = dev_get_priv(dev);
static ulong erase_start, erase_end;
switch (cmd->cmdidx) {
case MMC_CMD_ALL_SEND_CID:
memset(cmd->response, '\0', sizeof(cmd->response));
break;
case SD_CMD_SEND_RELATIVE_ADDR:
cmd->response[0] = 0 << 16; /* mmc->rca */
case MMC_CMD_GO_IDLE_STATE:
break;
case SD_CMD_SEND_IF_COND:
cmd->response[0] = 0xaa;
break;
case MMC_CMD_SEND_STATUS:
cmd->response[0] = MMC_STATUS_RDY_FOR_DATA;
break;
case MMC_CMD_SELECT_CARD:
break;
case MMC_CMD_SEND_CSD:
cmd->response[0] = 0;
cmd->response[1] = (MMC_BL_LEN_SHIFT << 16) |
((priv->csize >> 16) & 0x3f);
cmd->response[2] = (priv->csize & 0xffff) << 16;
cmd->response[3] = 0;
break;
case SD_CMD_SWITCH_FUNC: {
if (!data)
break;
u32 *resp = (u32 *)data->dest;
resp[3] = 0;
resp[7] = cpu_to_be32(SD_HIGHSPEED_BUSY);
if ((cmd->cmdarg & 0xF) == UHS_SDR12_BUS_SPEED)
resp[4] = (cmd->cmdarg & 0xF) << 24;
break;
}
case MMC_CMD_READ_SINGLE_BLOCK:
case MMC_CMD_READ_MULTIPLE_BLOCK:
memcpy(data->dest, &priv->buf[cmd->cmdarg * data->blocksize],
data->blocks * data->blocksize);
break;
case MMC_CMD_WRITE_SINGLE_BLOCK:
case MMC_CMD_WRITE_MULTIPLE_BLOCK:
memcpy(&priv->buf[cmd->cmdarg * data->blocksize], data->src,
data->blocks * data->blocksize);
break;
case MMC_CMD_STOP_TRANSMISSION:
break;
case SD_CMD_ERASE_WR_BLK_START:
erase_start = cmd->cmdarg;
break;
case SD_CMD_ERASE_WR_BLK_END:
erase_end = cmd->cmdarg;
break;
#if CONFIG_IS_ENABLED(MMC_WRITE)
case MMC_CMD_ERASE: {
struct mmc *mmc = mmc_get_mmc_dev(dev);
memset(&priv->buf[erase_start * mmc->write_bl_len], '\0',
(erase_end - erase_start + 1) * mmc->write_bl_len);
break;
}
#endif
case SD_CMD_APP_SEND_OP_COND:
cmd->response[0] = OCR_BUSY | OCR_HCS;
cmd->response[1] = 0;
cmd->response[2] = 0;
break;
case MMC_CMD_APP_CMD:
break;
case MMC_CMD_SET_BLOCKLEN:
debug("block len %d\n", cmd->cmdarg);
break;
case SD_CMD_APP_SEND_SCR: {
u32 *scr = (u32 *)data->dest;
scr[0] = cpu_to_be32(2 << 24 | 1 << 15); /* SD version 3 */
break;
}
default:
debug("%s: Unknown command %d\n", __func__, cmd->cmdidx);
break;
}
return 0;
}
static int sandbox_mmc_set_ios(struct udevice *dev)
{
return 0;
}
static int sandbox_mmc_get_cd(struct udevice *dev)
{
return 1;
}
static const struct dm_mmc_ops sandbox_mmc_ops = {
.send_cmd = sandbox_mmc_send_cmd,
.set_ios = sandbox_mmc_set_ios,
.get_cd = sandbox_mmc_get_cd,
};
static int sandbox_mmc_of_to_plat(struct udevice *dev)
{
struct sandbox_mmc_plat *plat = dev_get_plat(dev);
struct mmc_config *cfg = &plat->cfg;
struct blk_desc *blk;
int ret;
plat->fname = dev_read_string(dev, "filename");
ret = mmc_of_parse(dev, cfg);
if (ret)
return ret;
blk = mmc_get_blk_desc(&plat->mmc);
if (blk)
blk->removable = !(cfg->host_caps & MMC_CAP_NONREMOVABLE);
return 0;
}
static int sandbox_mmc_probe(struct udevice *dev)
{
struct sandbox_mmc_plat *plat = dev_get_plat(dev);
struct sandbox_mmc_priv *priv = dev_get_priv(dev);
int ret;
if (plat->fname) {
ret = os_map_file(plat->fname, OS_O_RDWR | OS_O_CREAT,
(void **)&priv->buf, &priv->size);
if (ret) {
log_err("%s: Unable to map file '%s'\n", dev->name,
plat->fname);
return ret;
}
priv->csize = priv->size / SIZE_MULTIPLE - 1;
} else {
priv->csize = 0;
priv->size = (priv->csize + 1) * SIZE_MULTIPLE; /* 1 MiB */
priv->buf = calloc(1, priv->size);
if (!priv->buf) {
log_err("%s: Not enough memory (%x bytes)\n",
dev->name, priv->size);
return -ENOMEM;
}
}
return mmc_init(&plat->mmc);
}
static int sandbox_mmc_remove(struct udevice *dev)
{
struct sandbox_mmc_plat *plat = dev_get_plat(dev);
struct sandbox_mmc_priv *priv = dev_get_priv(dev);
if (plat->fname)
os_unmap(priv->buf, priv->size);
else
free(priv->buf);
return 0;
}
static int sandbox_mmc_bind(struct udevice *dev)
{
struct sandbox_mmc_plat *plat = dev_get_plat(dev);
struct mmc_config *cfg = &plat->cfg;
cfg->name = dev->name;
cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
cfg->f_min = 1000000;
cfg->f_max = 52000000;
cfg->b_max = U32_MAX;
return mmc_bind(dev, &plat->mmc, cfg);
}
static int sandbox_mmc_unbind(struct udevice *dev)
{
mmc_unbind(dev);
return 0;
}
static const struct udevice_id sandbox_mmc_ids[] = {
{ .compatible = "sandbox,mmc" },
{ }
};
U_BOOT_DRIVER(mmc_sandbox) = {
.name = "mmc_sandbox",
.id = UCLASS_MMC,
.of_match = sandbox_mmc_ids,
.ops = &sandbox_mmc_ops,
.bind = sandbox_mmc_bind,
.unbind = sandbox_mmc_unbind,
.of_to_plat = sandbox_mmc_of_to_plat,
.probe = sandbox_mmc_probe,
.remove = sandbox_mmc_remove,
.priv_auto = sizeof(struct sandbox_mmc_priv),
.plat_auto = sizeof(struct sandbox_mmc_plat),
};
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