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 udevice
*dev
, 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
: {
53 u32
*resp
= (u32
*)data
->dest
;
54 resp
[7] = cpu_to_be32(SD_HIGHSPEED_BUSY
);
55 if ((cmd
->cmdarg
& 0xF) == UHS_SDR12_BUS_SPEED
)
56 resp
[4] = (cmd
->cmdarg
& 0xF) << 24;
59 case MMC_CMD_READ_SINGLE_BLOCK
:
60 memset(data
->dest
, '\0', data
->blocksize
);
62 case MMC_CMD_READ_MULTIPLE_BLOCK
:
63 strcpy(data
->dest
, "this is a test");
65 case MMC_CMD_STOP_TRANSMISSION
:
67 case SD_CMD_APP_SEND_OP_COND
:
68 cmd
->response
[0] = OCR_BUSY
| OCR_HCS
;
74 case MMC_CMD_SET_BLOCKLEN
:
75 debug("block len %d\n", cmd
->cmdarg
);
77 case SD_CMD_APP_SEND_SCR
: {
78 u32
*scr
= (u32
*)data
->dest
;
80 scr
[0] = cpu_to_be32(2 << 24 | 1 << 15); /* SD version 3 */
84 debug("%s: Unknown command %d\n", __func__
, cmd
->cmdidx
);
91 static int sandbox_mmc_set_ios(struct udevice
*dev
)
96 static int sandbox_mmc_get_cd(struct udevice
*dev
)
101 static const struct dm_mmc_ops sandbox_mmc_ops
= {
102 .send_cmd
= sandbox_mmc_send_cmd
,
103 .set_ios
= sandbox_mmc_set_ios
,
104 .get_cd
= sandbox_mmc_get_cd
,
107 int sandbox_mmc_probe(struct udevice
*dev
)
109 struct sandbox_mmc_plat
*plat
= dev_get_platdata(dev
);
111 return mmc_init(&plat
->mmc
);
114 int sandbox_mmc_bind(struct udevice
*dev
)
116 struct sandbox_mmc_plat
*plat
= dev_get_platdata(dev
);
117 struct mmc_config
*cfg
= &plat
->cfg
;
119 cfg
->name
= dev
->name
;
120 cfg
->host_caps
= MMC_MODE_HS_52MHz
| MMC_MODE_HS
| MMC_MODE_8BIT
;
121 cfg
->voltages
= MMC_VDD_165_195
| MMC_VDD_32_33
| MMC_VDD_33_34
;
122 cfg
->f_min
= 1000000;
123 cfg
->f_max
= 52000000;
124 cfg
->b_max
= U32_MAX
;
126 return mmc_bind(dev
, &plat
->mmc
, cfg
);
129 int sandbox_mmc_unbind(struct udevice
*dev
)
136 static const struct udevice_id sandbox_mmc_ids
[] = {
137 { .compatible
= "sandbox,mmc" },
141 U_BOOT_DRIVER(mmc_sandbox
) = {
142 .name
= "mmc_sandbox",
144 .of_match
= sandbox_mmc_ids
,
145 .ops
= &sandbox_mmc_ops
,
146 .bind
= sandbox_mmc_bind
,
147 .unbind
= sandbox_mmc_unbind
,
148 .probe
= sandbox_mmc_probe
,
149 .platdata_auto_alloc_size
= sizeof(struct sandbox_mmc_plat
),