2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
15 DECLARE_GLOBAL_DATA_PTR
;
17 struct sandbox_mmc_plat
{
18 struct mmc_config cfg
;
23 * sandbox_mmc_send_cmd() - Emulate SD commands
25 * This emulate an SD card version 2. Single-block reads result in zero data.
26 * Multiple-block reads return a test string.
28 static int sandbox_mmc_send_cmd(struct mmc
*mmc
, struct mmc_cmd
*cmd
,
29 struct mmc_data
*data
)
31 switch (cmd
->cmdidx
) {
32 case MMC_CMD_ALL_SEND_CID
:
34 case SD_CMD_SEND_RELATIVE_ADDR
:
35 cmd
->response
[0] = 0 << 16; /* mmc->rca */
36 case MMC_CMD_GO_IDLE_STATE
:
38 case SD_CMD_SEND_IF_COND
:
39 cmd
->response
[0] = 0xaa;
41 case MMC_CMD_SEND_STATUS
:
42 cmd
->response
[0] = MMC_STATUS_RDY_FOR_DATA
;
44 case MMC_CMD_SELECT_CARD
:
46 case MMC_CMD_SEND_CSD
:
48 cmd
->response
[1] = 10 << 16; /* 1 << block_len */
50 case SD_CMD_SWITCH_FUNC
: {
51 u32
*resp
= (u32
*)data
->dest
;
53 resp
[7] = cpu_to_be32(SD_HIGHSPEED_BUSY
);
56 case MMC_CMD_READ_SINGLE_BLOCK
:
57 memset(data
->dest
, '\0', data
->blocksize
);
59 case MMC_CMD_READ_MULTIPLE_BLOCK
:
60 strcpy(data
->dest
, "this is a test");
62 case MMC_CMD_STOP_TRANSMISSION
:
64 case SD_CMD_APP_SEND_OP_COND
:
65 cmd
->response
[0] = OCR_BUSY
| OCR_HCS
;
71 case MMC_CMD_SET_BLOCKLEN
:
72 debug("block len %d\n", cmd
->cmdarg
);
74 case SD_CMD_APP_SEND_SCR
: {
75 u32
*scr
= (u32
*)data
->dest
;
77 scr
[0] = cpu_to_be32(2 << 24 | 1 << 15); /* SD version 3 */
81 debug("%s: Unknown command %d\n", __func__
, cmd
->cmdidx
);
88 static void sandbox_mmc_set_ios(struct mmc
*mmc
)
92 static int sandbox_mmc_init(struct mmc
*mmc
)
97 static int sandbox_mmc_getcd(struct mmc
*mmc
)
102 static const struct mmc_ops sandbox_mmc_ops
= {
103 .send_cmd
= sandbox_mmc_send_cmd
,
104 .set_ios
= sandbox_mmc_set_ios
,
105 .init
= sandbox_mmc_init
,
106 .getcd
= sandbox_mmc_getcd
,
109 int sandbox_mmc_probe(struct udevice
*dev
)
111 struct sandbox_mmc_plat
*plat
= dev_get_platdata(dev
);
113 return mmc_init(&plat
->mmc
);
116 int sandbox_mmc_bind(struct udevice
*dev
)
118 struct sandbox_mmc_plat
*plat
= dev_get_platdata(dev
);
119 struct mmc_config
*cfg
= &plat
->cfg
;
122 cfg
->name
= dev
->name
;
123 cfg
->ops
= &sandbox_mmc_ops
;
124 cfg
->host_caps
= MMC_MODE_HS_52MHz
| MMC_MODE_HS
| MMC_MODE_8BIT
;
125 cfg
->voltages
= MMC_VDD_165_195
| MMC_VDD_32_33
| MMC_VDD_33_34
;
126 cfg
->f_min
= 1000000;
127 cfg
->f_max
= 52000000;
128 cfg
->b_max
= U32_MAX
;
130 ret
= mmc_bind(dev
, &plat
->mmc
, cfg
);
137 int sandbox_mmc_unbind(struct udevice
*dev
)
144 static const struct udevice_id sandbox_mmc_ids
[] = {
145 { .compatible
= "sandbox,mmc" },
149 U_BOOT_DRIVER(mmc_sandbox
) = {
150 .name
= "mmc_sandbox",
152 .of_match
= sandbox_mmc_ids
,
153 .bind
= sandbox_mmc_bind
,
154 .unbind
= sandbox_mmc_unbind
,
155 .probe
= sandbox_mmc_probe
,
156 .platdata_auto_alloc_size
= sizeof(struct sandbox_mmc_plat
),