mirror of
https://github.com/AsahiLinux/u-boot
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67bb973122
When running multiple tests the mmc emulator calls malloc() to obtain the memory for its disk image. Since the memory is not cleared, it is possible that it happens to contain a partition table. The dm_test_part() test (for one) relies on mmc0 being empty on startup. Zero the memory to ensure that it is. Signed-off-by: Simon Glass <sjg@chromium.org>
249 lines
5.7 KiB
C
249 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <log.h>
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#include <malloc.h>
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#include <mmc.h>
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#include <os.h>
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#include <asm/test.h>
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struct sandbox_mmc_plat {
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struct mmc_config cfg;
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struct mmc mmc;
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const char *fname;
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};
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#define MMC_CMULT 8 /* 8 because the card is high-capacity */
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#define MMC_BL_LEN_SHIFT 10
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#define MMC_BL_LEN BIT(MMC_BL_LEN_SHIFT)
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/* Granularity of priv->csize - this is 1MB */
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#define SIZE_MULTIPLE ((1 << (MMC_CMULT + 2)) * MMC_BL_LEN)
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struct sandbox_mmc_priv {
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char *buf;
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int csize; /* CSIZE value to report */
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int size;
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};
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/**
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* sandbox_mmc_send_cmd() - Emulate SD commands
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*
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* This emulate an SD card version 2. Single-block reads result in zero data.
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* Multiple-block reads return a test string.
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*/
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static int sandbox_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
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struct mmc_data *data)
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{
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struct sandbox_mmc_priv *priv = dev_get_priv(dev);
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static ulong erase_start, erase_end;
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switch (cmd->cmdidx) {
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case MMC_CMD_ALL_SEND_CID:
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memset(cmd->response, '\0', sizeof(cmd->response));
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break;
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case SD_CMD_SEND_RELATIVE_ADDR:
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cmd->response[0] = 0 << 16; /* mmc->rca */
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case MMC_CMD_GO_IDLE_STATE:
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break;
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case SD_CMD_SEND_IF_COND:
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cmd->response[0] = 0xaa;
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break;
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case MMC_CMD_SEND_STATUS:
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cmd->response[0] = MMC_STATUS_RDY_FOR_DATA;
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break;
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case MMC_CMD_SELECT_CARD:
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break;
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case MMC_CMD_SEND_CSD:
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cmd->response[0] = 0;
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cmd->response[1] = (MMC_BL_LEN_SHIFT << 16) |
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((priv->csize >> 16) & 0x3f);
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cmd->response[2] = (priv->csize & 0xffff) << 16;
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cmd->response[3] = 0;
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break;
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case SD_CMD_SWITCH_FUNC: {
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if (!data)
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break;
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u32 *resp = (u32 *)data->dest;
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resp[3] = 0;
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resp[7] = cpu_to_be32(SD_HIGHSPEED_BUSY);
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if ((cmd->cmdarg & 0xF) == UHS_SDR12_BUS_SPEED)
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resp[4] = (cmd->cmdarg & 0xF) << 24;
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break;
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}
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case MMC_CMD_READ_SINGLE_BLOCK:
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case MMC_CMD_READ_MULTIPLE_BLOCK:
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memcpy(data->dest, &priv->buf[cmd->cmdarg * data->blocksize],
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data->blocks * data->blocksize);
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break;
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case MMC_CMD_WRITE_SINGLE_BLOCK:
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case MMC_CMD_WRITE_MULTIPLE_BLOCK:
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memcpy(&priv->buf[cmd->cmdarg * data->blocksize], data->src,
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data->blocks * data->blocksize);
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break;
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case MMC_CMD_STOP_TRANSMISSION:
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break;
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case SD_CMD_ERASE_WR_BLK_START:
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erase_start = cmd->cmdarg;
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break;
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case SD_CMD_ERASE_WR_BLK_END:
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erase_end = cmd->cmdarg;
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break;
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#if CONFIG_IS_ENABLED(MMC_WRITE)
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case MMC_CMD_ERASE: {
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struct mmc *mmc = mmc_get_mmc_dev(dev);
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memset(&priv->buf[erase_start * mmc->write_bl_len], '\0',
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(erase_end - erase_start + 1) * mmc->write_bl_len);
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break;
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}
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#endif
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case SD_CMD_APP_SEND_OP_COND:
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cmd->response[0] = OCR_BUSY | OCR_HCS;
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cmd->response[1] = 0;
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cmd->response[2] = 0;
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break;
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case MMC_CMD_APP_CMD:
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break;
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case MMC_CMD_SET_BLOCKLEN:
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debug("block len %d\n", cmd->cmdarg);
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break;
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case SD_CMD_APP_SEND_SCR: {
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u32 *scr = (u32 *)data->dest;
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scr[0] = cpu_to_be32(2 << 24 | 1 << 15); /* SD version 3 */
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break;
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}
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default:
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debug("%s: Unknown command %d\n", __func__, cmd->cmdidx);
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break;
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}
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return 0;
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}
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static int sandbox_mmc_set_ios(struct udevice *dev)
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{
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return 0;
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}
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static int sandbox_mmc_get_cd(struct udevice *dev)
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{
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return 1;
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}
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static const struct dm_mmc_ops sandbox_mmc_ops = {
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.send_cmd = sandbox_mmc_send_cmd,
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.set_ios = sandbox_mmc_set_ios,
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.get_cd = sandbox_mmc_get_cd,
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};
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static int sandbox_mmc_of_to_plat(struct udevice *dev)
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{
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struct sandbox_mmc_plat *plat = dev_get_plat(dev);
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struct mmc_config *cfg = &plat->cfg;
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struct blk_desc *blk;
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int ret;
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plat->fname = dev_read_string(dev, "filename");
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ret = mmc_of_parse(dev, cfg);
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if (ret)
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return ret;
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blk = mmc_get_blk_desc(&plat->mmc);
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if (blk)
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blk->removable = !(cfg->host_caps & MMC_CAP_NONREMOVABLE);
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return 0;
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}
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static int sandbox_mmc_probe(struct udevice *dev)
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{
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struct sandbox_mmc_plat *plat = dev_get_plat(dev);
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struct sandbox_mmc_priv *priv = dev_get_priv(dev);
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int ret;
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if (plat->fname) {
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ret = os_map_file(plat->fname, OS_O_RDWR | OS_O_CREAT,
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(void **)&priv->buf, &priv->size);
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if (ret) {
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log_err("%s: Unable to map file '%s'\n", dev->name,
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plat->fname);
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return ret;
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}
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priv->csize = priv->size / SIZE_MULTIPLE - 1;
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} else {
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priv->csize = 0;
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priv->size = (priv->csize + 1) * SIZE_MULTIPLE; /* 1 MiB */
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priv->buf = calloc(1, priv->size);
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if (!priv->buf) {
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log_err("%s: Not enough memory (%x bytes)\n",
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dev->name, priv->size);
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return -ENOMEM;
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}
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}
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return mmc_init(&plat->mmc);
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}
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static int sandbox_mmc_remove(struct udevice *dev)
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{
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struct sandbox_mmc_plat *plat = dev_get_plat(dev);
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struct sandbox_mmc_priv *priv = dev_get_priv(dev);
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if (plat->fname)
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os_unmap(priv->buf, priv->size);
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else
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free(priv->buf);
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return 0;
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}
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static int sandbox_mmc_bind(struct udevice *dev)
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{
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struct sandbox_mmc_plat *plat = dev_get_plat(dev);
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struct mmc_config *cfg = &plat->cfg;
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cfg->name = dev->name;
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cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
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cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
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cfg->f_min = 1000000;
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cfg->f_max = 52000000;
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cfg->b_max = U32_MAX;
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return mmc_bind(dev, &plat->mmc, cfg);
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}
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static int sandbox_mmc_unbind(struct udevice *dev)
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{
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mmc_unbind(dev);
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return 0;
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}
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static const struct udevice_id sandbox_mmc_ids[] = {
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{ .compatible = "sandbox,mmc" },
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{ }
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};
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U_BOOT_DRIVER(mmc_sandbox) = {
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.name = "mmc_sandbox",
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.id = UCLASS_MMC,
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.of_match = sandbox_mmc_ids,
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.ops = &sandbox_mmc_ops,
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.bind = sandbox_mmc_bind,
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.unbind = sandbox_mmc_unbind,
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.of_to_plat = sandbox_mmc_of_to_plat,
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.probe = sandbox_mmc_probe,
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.remove = sandbox_mmc_remove,
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.priv_auto = sizeof(struct sandbox_mmc_priv),
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.plat_auto = sizeof(struct sandbox_mmc_plat),
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};
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