1 /* 2 * Copyright (c) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <fdtdec.h> 12 #include <mmc.h> 13 #include <asm/test.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 struct sandbox_mmc_plat { 18 struct mmc_config cfg; 19 struct mmc mmc; 20 }; 21 22 /** 23 * sandbox_mmc_send_cmd() - Emulate SD commands 24 * 25 * This emulate an SD card version 2. Single-block reads result in zero data. 26 * Multiple-block reads return a test string. 27 */ 28 static int sandbox_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, 29 struct mmc_data *data) 30 { 31 switch (cmd->cmdidx) { 32 case MMC_CMD_ALL_SEND_CID: 33 break; 34 case SD_CMD_SEND_RELATIVE_ADDR: 35 cmd->response[0] = 0 << 16; /* mmc->rca */ 36 case MMC_CMD_GO_IDLE_STATE: 37 break; 38 case SD_CMD_SEND_IF_COND: 39 cmd->response[0] = 0xaa; 40 break; 41 case MMC_CMD_SEND_STATUS: 42 cmd->response[0] = MMC_STATUS_RDY_FOR_DATA; 43 break; 44 case MMC_CMD_SELECT_CARD: 45 break; 46 case MMC_CMD_SEND_CSD: 47 cmd->response[0] = 0; 48 cmd->response[1] = 10 << 16; /* 1 << block_len */ 49 break; 50 case SD_CMD_SWITCH_FUNC: { 51 u32 *resp = (u32 *)data->dest; 52 53 resp[7] = cpu_to_be32(SD_HIGHSPEED_BUSY); 54 break; 55 } 56 case MMC_CMD_READ_SINGLE_BLOCK: 57 memset(data->dest, '\0', data->blocksize); 58 break; 59 case MMC_CMD_READ_MULTIPLE_BLOCK: 60 strcpy(data->dest, "this is a test"); 61 break; 62 case MMC_CMD_STOP_TRANSMISSION: 63 break; 64 case SD_CMD_APP_SEND_OP_COND: 65 cmd->response[0] = OCR_BUSY | OCR_HCS; 66 cmd->response[1] = 0; 67 cmd->response[2] = 0; 68 break; 69 case MMC_CMD_APP_CMD: 70 break; 71 case MMC_CMD_SET_BLOCKLEN: 72 debug("block len %d\n", cmd->cmdarg); 73 break; 74 case SD_CMD_APP_SEND_SCR: { 75 u32 *scr = (u32 *)data->dest; 76 77 scr[0] = cpu_to_be32(2 << 24 | 1 << 15); /* SD version 3 */ 78 break; 79 } 80 default: 81 debug("%s: Unknown command %d\n", __func__, cmd->cmdidx); 82 break; 83 } 84 85 return 0; 86 } 87 88 static int sandbox_mmc_set_ios(struct udevice *dev) 89 { 90 return 0; 91 } 92 93 static int sandbox_mmc_get_cd(struct udevice *dev) 94 { 95 return 1; 96 } 97 98 static const struct dm_mmc_ops sandbox_mmc_ops = { 99 .send_cmd = sandbox_mmc_send_cmd, 100 .set_ios = sandbox_mmc_set_ios, 101 .get_cd = sandbox_mmc_get_cd, 102 }; 103 104 int sandbox_mmc_probe(struct udevice *dev) 105 { 106 struct sandbox_mmc_plat *plat = dev_get_platdata(dev); 107 108 return mmc_init(&plat->mmc); 109 } 110 111 int sandbox_mmc_bind(struct udevice *dev) 112 { 113 struct sandbox_mmc_plat *plat = dev_get_platdata(dev); 114 struct mmc_config *cfg = &plat->cfg; 115 116 cfg->name = dev->name; 117 cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT; 118 cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34; 119 cfg->f_min = 1000000; 120 cfg->f_max = 52000000; 121 cfg->b_max = U32_MAX; 122 123 return mmc_bind(dev, &plat->mmc, cfg); 124 } 125 126 int sandbox_mmc_unbind(struct udevice *dev) 127 { 128 mmc_unbind(dev); 129 130 return 0; 131 } 132 133 static const struct udevice_id sandbox_mmc_ids[] = { 134 { .compatible = "sandbox,mmc" }, 135 { } 136 }; 137 138 U_BOOT_DRIVER(mmc_sandbox) = { 139 .name = "mmc_sandbox", 140 .id = UCLASS_MMC, 141 .of_match = sandbox_mmc_ids, 142 .ops = &sandbox_mmc_ops, 143 .bind = sandbox_mmc_bind, 144 .unbind = sandbox_mmc_unbind, 145 .probe = sandbox_mmc_probe, 146 .platdata_auto_alloc_size = sizeof(struct sandbox_mmc_plat), 147 }; 148