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147 lines
3.2 KiB
147 lines
3.2 KiB
// 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 <[email protected]> |
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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 <mmc.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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}; |
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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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switch (cmd->cmdidx) { |
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case MMC_CMD_ALL_SEND_CID: |
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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] = 10 << 16; /* 1 << block_len */ |
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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[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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memset(data->dest, '\0', data->blocksize); |
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break; |
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case MMC_CMD_READ_MULTIPLE_BLOCK: |
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strcpy(data->dest, "this is a test"); |
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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_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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int sandbox_mmc_probe(struct udevice *dev) |
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{ |
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struct sandbox_mmc_plat *plat = dev_get_platdata(dev); |
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return mmc_init(&plat->mmc); |
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} |
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int sandbox_mmc_bind(struct udevice *dev) |
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{ |
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struct sandbox_mmc_plat *plat = dev_get_platdata(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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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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.probe = sandbox_mmc_probe, |
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.platdata_auto_alloc_size = sizeof(struct sandbox_mmc_plat), |
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};
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