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1/*
2 * linux/drivers/mmc/core/sd_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#include <linux/slab.h>
13#include <linux/types.h>
14#include <linux/export.h>
15#include <linux/scatterlist.h>
16
17#include <linux/mmc/host.h>
18#include <linux/mmc/card.h>
19#include <linux/mmc/mmc.h>
20#include <linux/mmc/sd.h>
21
22#include "core.h"
23#include "sd_ops.h"
24
25int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
26{
27 int err;
28 struct mmc_command cmd = {0};
29
30 BUG_ON(!host);
31 BUG_ON(card && (card->host != host));
32
33 cmd.opcode = MMC_APP_CMD;
34
35 if (card) {
36 cmd.arg = card->rca << 16;
37 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
38 } else {
39 cmd.arg = 0;
40 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
41 }
42
43 err = mmc_wait_for_cmd(host, &cmd, 0);
44 if (err)
45 return err;
46
47 /* Check that card supported application commands */
48 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
49 return -EOPNOTSUPP;
50
51 return 0;
52}
53EXPORT_SYMBOL_GPL(mmc_app_cmd);
54
55/**
56 * mmc_wait_for_app_cmd - start an application command and wait for
57 completion
58 * @host: MMC host to start command
59 * @card: Card to send MMC_APP_CMD to
60 * @cmd: MMC command to start
61 * @retries: maximum number of retries
62 *
63 * Sends a MMC_APP_CMD, checks the card response, sends the command
64 * in the parameter and waits for it to complete. Return any error
65 * that occurred while the command was executing. Do not attempt to
66 * parse the response.
67 */
68int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
69 struct mmc_command *cmd, int retries)
70{
71 struct mmc_request mrq = {NULL};
72
73 int i, err;
74
75 BUG_ON(!cmd);
76 BUG_ON(retries < 0);
77
78 err = -EIO;
79
80 /*
81 * We have to resend MMC_APP_CMD for each attempt so
82 * we cannot use the retries field in mmc_command.
83 */
84 for (i = 0;i <= retries;i++) {
85 err = mmc_app_cmd(host, card);
86 if (err) {
87 /* no point in retrying; no APP commands allowed */
88 if (mmc_host_is_spi(host)) {
89 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
90 break;
91 }
92 continue;
93 }
94
95 memset(&mrq, 0, sizeof(struct mmc_request));
96
97 memset(cmd->resp, 0, sizeof(cmd->resp));
98 cmd->retries = 0;
99
100 mrq.cmd = cmd;
101 cmd->data = NULL;
102
103 mmc_wait_for_req(host, &mrq);
104
105 err = cmd->error;
106 if (!cmd->error)
107 break;
108
109 /* no point in retrying illegal APP commands */
110 if (mmc_host_is_spi(host)) {
111 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
112 break;
113 }
114 }
115
116 return err;
117}
118
119EXPORT_SYMBOL(mmc_wait_for_app_cmd);
120
121int mmc_app_set_bus_width(struct mmc_card *card, int width)
122{
123 int err;
124 struct mmc_command cmd = {0};
125
126 BUG_ON(!card);
127 BUG_ON(!card->host);
128
129 cmd.opcode = SD_APP_SET_BUS_WIDTH;
130 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
131
132 switch (width) {
133 case MMC_BUS_WIDTH_1:
134 cmd.arg = SD_BUS_WIDTH_1;
135 break;
136 case MMC_BUS_WIDTH_4:
137 cmd.arg = SD_BUS_WIDTH_4;
138 break;
139 default:
140 return -EINVAL;
141 }
142
143 err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
144 if (err)
145 return err;
146
147 return 0;
148}
149
150int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
151{
152 struct mmc_command cmd = {0};
153 int i, err = 0;
154
155 BUG_ON(!host);
156
157 cmd.opcode = SD_APP_OP_COND;
158 if (mmc_host_is_spi(host))
159 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
160 else
161 cmd.arg = ocr;
162 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
163
164 for (i = 100; i; i--) {
165 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
166 if (err)
167 break;
168
169 /* if we're just probing, do a single pass */
170 if (ocr == 0)
171 break;
172
173 /* otherwise wait until reset completes */
174 if (mmc_host_is_spi(host)) {
175 if (!(cmd.resp[0] & R1_SPI_IDLE))
176 break;
177 } else {
178 if (cmd.resp[0] & MMC_CARD_BUSY)
179 break;
180 }
181
182 err = -ETIMEDOUT;
183
184 mmc_delay(10);
185 }
186
187 if (rocr && !mmc_host_is_spi(host))
188 *rocr = cmd.resp[0];
189
190 return err;
191}
192
193int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
194{
195 struct mmc_command cmd = {0};
196 int err;
197 static const u8 test_pattern = 0xAA;
198 u8 result_pattern;
199
200 /*
201 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
202 * before SD_APP_OP_COND. This command will harmlessly fail for
203 * SD 1.0 cards.
204 */
205 cmd.opcode = SD_SEND_IF_COND;
206 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
207 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
208
209 err = mmc_wait_for_cmd(host, &cmd, 0);
210 if (err)
211 return err;
212
213 if (mmc_host_is_spi(host))
214 result_pattern = cmd.resp[1] & 0xFF;
215 else
216 result_pattern = cmd.resp[0] & 0xFF;
217
218 if (result_pattern != test_pattern)
219 return -EIO;
220
221 return 0;
222}
223
224int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
225{
226 int err;
227 struct mmc_command cmd = {0};
228
229 BUG_ON(!host);
230 BUG_ON(!rca);
231
232 cmd.opcode = SD_SEND_RELATIVE_ADDR;
233 cmd.arg = 0;
234 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
235
236 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
237 if (err)
238 return err;
239
240 *rca = cmd.resp[0] >> 16;
241
242 return 0;
243}
244
245int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
246{
247 int err;
248 struct mmc_request mrq = {NULL};
249 struct mmc_command cmd = {0};
250 struct mmc_data data = {0};
251 struct scatterlist sg;
252 void *data_buf;
253
254 BUG_ON(!card);
255 BUG_ON(!card->host);
256 BUG_ON(!scr);
257
258 /* NOTE: caller guarantees scr is heap-allocated */
259
260 err = mmc_app_cmd(card->host, card);
261 if (err)
262 return err;
263
264 /* dma onto stack is unsafe/nonportable, but callers to this
265 * routine normally provide temporary on-stack buffers ...
266 */
267 data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
268 if (data_buf == NULL)
269 return -ENOMEM;
270
271 mrq.cmd = &cmd;
272 mrq.data = &data;
273
274 cmd.opcode = SD_APP_SEND_SCR;
275 cmd.arg = 0;
276 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
277
278 data.blksz = 8;
279 data.blocks = 1;
280 data.flags = MMC_DATA_READ;
281 data.sg = &sg;
282 data.sg_len = 1;
283
284 sg_init_one(&sg, data_buf, 8);
285
286 mmc_set_data_timeout(&data, card);
287
288 mmc_wait_for_req(card->host, &mrq);
289
290 memcpy(scr, data_buf, sizeof(card->raw_scr));
291 kfree(data_buf);
292
293 if (cmd.error)
294 return cmd.error;
295 if (data.error)
296 return data.error;
297
298 scr[0] = be32_to_cpu(scr[0]);
299 scr[1] = be32_to_cpu(scr[1]);
300
301 return 0;
302}
303
304int mmc_sd_switch(struct mmc_card *card, int mode, int group,
305 u8 value, u8 *resp)
306{
307 struct mmc_request mrq = {NULL};
308 struct mmc_command cmd = {0};
309 struct mmc_data data = {0};
310 struct scatterlist sg;
311
312 BUG_ON(!card);
313 BUG_ON(!card->host);
314
315 /* NOTE: caller guarantees resp is heap-allocated */
316
317 mode = !!mode;
318 value &= 0xF;
319
320 mrq.cmd = &cmd;
321 mrq.data = &data;
322
323 cmd.opcode = SD_SWITCH;
324 cmd.arg = mode << 31 | 0x00FFFFFF;
325 cmd.arg &= ~(0xF << (group * 4));
326 cmd.arg |= value << (group * 4);
327 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
328
329 data.blksz = 64;
330 data.blocks = 1;
331 data.flags = MMC_DATA_READ;
332 data.sg = &sg;
333 data.sg_len = 1;
334
335 sg_init_one(&sg, resp, 64);
336
337 mmc_set_data_timeout(&data, card);
338
339 mmc_wait_for_req(card->host, &mrq);
340
341 if (cmd.error)
342 return cmd.error;
343 if (data.error)
344 return data.error;
345
346 return 0;
347}
348
349int mmc_app_sd_status(struct mmc_card *card, void *ssr)
350{
351 int err;
352 struct mmc_request mrq = {NULL};
353 struct mmc_command cmd = {0};
354 struct mmc_data data = {0};
355 struct scatterlist sg;
356
357 BUG_ON(!card);
358 BUG_ON(!card->host);
359 BUG_ON(!ssr);
360
361 /* NOTE: caller guarantees ssr is heap-allocated */
362
363 err = mmc_app_cmd(card->host, card);
364 if (err)
365 return err;
366
367 mrq.cmd = &cmd;
368 mrq.data = &data;
369
370 cmd.opcode = SD_APP_SD_STATUS;
371 cmd.arg = 0;
372 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
373
374 data.blksz = 64;
375 data.blocks = 1;
376 data.flags = MMC_DATA_READ;
377 data.sg = &sg;
378 data.sg_len = 1;
379
380 sg_init_one(&sg, ssr, 64);
381
382 mmc_set_data_timeout(&data, card);
383
384 mmc_wait_for_req(card->host, &mrq);
385
386 if (cmd.error)
387 return cmd.error;
388 if (data.error)
389 return data.error;
390
391 return 0;
392}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * linux/drivers/mmc/core/sd_ops.h
4 *
5 * Copyright 2006-2007 Pierre Ossman
6 */
7
8#include <linux/slab.h>
9#include <linux/types.h>
10#include <linux/export.h>
11#include <linux/scatterlist.h>
12
13#include <linux/mmc/host.h>
14#include <linux/mmc/card.h>
15#include <linux/mmc/mmc.h>
16#include <linux/mmc/sd.h>
17
18#include "core.h"
19#include "card.h"
20#include "sd_ops.h"
21#include "mmc_ops.h"
22
23/*
24 * Extensive testing has shown that some specific SD cards
25 * require an increased command timeout to be successfully
26 * initialized.
27 */
28#define SD_APP_OP_COND_PERIOD_US (10 * 1000) /* 10ms */
29#define SD_APP_OP_COND_TIMEOUT_MS 2000 /* 2s */
30
31struct sd_app_op_cond_busy_data {
32 struct mmc_host *host;
33 u32 ocr;
34 struct mmc_command *cmd;
35};
36
37int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
38{
39 int err;
40 struct mmc_command cmd = {};
41
42 if (WARN_ON(card && card->host != host))
43 return -EINVAL;
44
45 /*
46 * UHS2 packet has APP bit so only set APP_CMD flag here.
47 * Will set the APP bit when assembling UHS2 packet.
48 */
49 if (host->uhs2_sd_tran) {
50 host->uhs2_app_cmd = true;
51 return 0;
52 }
53
54 cmd.opcode = MMC_APP_CMD;
55
56 if (card) {
57 cmd.arg = card->rca << 16;
58 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
59 } else {
60 cmd.arg = 0;
61 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
62 }
63
64 err = mmc_wait_for_cmd(host, &cmd, 0);
65 if (err)
66 return err;
67
68 /* Check that card supported application commands */
69 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
70 return -EOPNOTSUPP;
71
72 return 0;
73}
74EXPORT_SYMBOL_GPL(mmc_app_cmd);
75
76static int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
77 struct mmc_command *cmd)
78{
79 struct mmc_request mrq = {};
80 int i, err = -EIO;
81
82 /*
83 * We have to resend MMC_APP_CMD for each attempt so
84 * we cannot use the retries field in mmc_command.
85 */
86 for (i = 0; i <= MMC_CMD_RETRIES; i++) {
87 err = mmc_app_cmd(host, card);
88 if (err) {
89 /* no point in retrying; no APP commands allowed */
90 if (mmc_host_is_spi(host)) {
91 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
92 break;
93 }
94 continue;
95 }
96
97 memset(&mrq, 0, sizeof(struct mmc_request));
98
99 memset(cmd->resp, 0, sizeof(cmd->resp));
100 cmd->retries = 0;
101
102 mrq.cmd = cmd;
103 cmd->data = NULL;
104
105 mmc_wait_for_req(host, &mrq);
106
107 err = cmd->error;
108 if (!cmd->error)
109 break;
110
111 /* no point in retrying illegal APP commands */
112 if (mmc_host_is_spi(host)) {
113 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
114 break;
115 }
116 }
117
118 return err;
119}
120
121int mmc_app_set_bus_width(struct mmc_card *card, int width)
122{
123 struct mmc_command cmd = {};
124
125 cmd.opcode = SD_APP_SET_BUS_WIDTH;
126 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
127
128 switch (width) {
129 case MMC_BUS_WIDTH_1:
130 cmd.arg = SD_BUS_WIDTH_1;
131 break;
132 case MMC_BUS_WIDTH_4:
133 cmd.arg = SD_BUS_WIDTH_4;
134 break;
135 default:
136 return -EINVAL;
137 }
138
139 return mmc_wait_for_app_cmd(card->host, card, &cmd);
140}
141
142static int sd_app_op_cond_cb(void *cb_data, bool *busy)
143{
144 struct sd_app_op_cond_busy_data *data = cb_data;
145 struct mmc_host *host = data->host;
146 struct mmc_command *cmd = data->cmd;
147 u32 ocr = data->ocr;
148 int err;
149
150 *busy = false;
151
152 err = mmc_wait_for_app_cmd(host, NULL, cmd);
153 if (err)
154 return err;
155
156 /* If we're just probing, do a single pass. */
157 if (ocr == 0)
158 return 0;
159
160 /* Wait until reset completes. */
161 if (mmc_host_is_spi(host)) {
162 if (!(cmd->resp[0] & R1_SPI_IDLE))
163 return 0;
164 } else if (cmd->resp[0] & MMC_CARD_BUSY) {
165 return 0;
166 }
167
168 *busy = true;
169 return 0;
170}
171
172int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
173{
174 struct mmc_command cmd = {};
175 struct sd_app_op_cond_busy_data cb_data = {
176 .host = host,
177 .ocr = ocr,
178 .cmd = &cmd
179 };
180 int err;
181
182 cmd.opcode = SD_APP_OP_COND;
183 if (mmc_host_is_spi(host))
184 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
185 else
186 cmd.arg = ocr;
187 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
188
189 err = __mmc_poll_for_busy(host, SD_APP_OP_COND_PERIOD_US,
190 SD_APP_OP_COND_TIMEOUT_MS, &sd_app_op_cond_cb,
191 &cb_data);
192 if (err)
193 return err;
194
195 if (rocr && !mmc_host_is_spi(host))
196 *rocr = cmd.resp[0];
197
198 return 0;
199}
200
201int mmc_send_ext_addr(struct mmc_host *host, u32 addr)
202{
203 struct mmc_command cmd = {
204 .opcode = SD_ADDR_EXT,
205 .arg = addr,
206 .flags = MMC_RSP_R1 | MMC_CMD_AC,
207 };
208
209 if (!mmc_card_ult_capacity(host->card))
210 return 0;
211
212 return mmc_wait_for_cmd(host, &cmd, 0);
213}
214
215static int __mmc_send_if_cond(struct mmc_host *host, u32 ocr, u8 pcie_bits,
216 u32 *resp)
217{
218 struct mmc_command cmd = {};
219 int err;
220 static const u8 test_pattern = 0xAA;
221 u8 result_pattern;
222
223 /*
224 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
225 * before SD_APP_OP_COND. This command will harmlessly fail for
226 * SD 1.0 cards.
227 */
228 cmd.opcode = SD_SEND_IF_COND;
229 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | pcie_bits << 8 | test_pattern;
230 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
231
232 err = mmc_wait_for_cmd(host, &cmd, 0);
233 if (err)
234 return err;
235
236 if (mmc_host_is_spi(host))
237 result_pattern = cmd.resp[1] & 0xFF;
238 else
239 result_pattern = cmd.resp[0] & 0xFF;
240
241 if (result_pattern != test_pattern)
242 return -EIO;
243
244 if (resp)
245 *resp = cmd.resp[0];
246
247 return 0;
248}
249
250int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
251{
252 return __mmc_send_if_cond(host, ocr, 0, NULL);
253}
254
255int mmc_send_if_cond_pcie(struct mmc_host *host, u32 ocr)
256{
257 u32 resp = 0;
258 u8 pcie_bits = 0;
259 int ret;
260
261 if (host->caps2 & MMC_CAP2_SD_EXP) {
262 /* Probe card for SD express support via PCIe. */
263 pcie_bits = 0x10;
264 if (host->caps2 & MMC_CAP2_SD_EXP_1_2V)
265 /* Probe also for 1.2V support. */
266 pcie_bits = 0x30;
267 }
268
269 ret = __mmc_send_if_cond(host, ocr, pcie_bits, &resp);
270 if (ret)
271 return 0;
272
273 /* Continue with the SD express init, if the card supports it. */
274 resp &= 0x3000;
275 if (pcie_bits && resp) {
276 if (resp == 0x3000)
277 host->ios.timing = MMC_TIMING_SD_EXP_1_2V;
278 else
279 host->ios.timing = MMC_TIMING_SD_EXP;
280
281 /*
282 * According to the spec the clock shall also be gated, but
283 * let's leave this to the host driver for more flexibility.
284 */
285 return host->ops->init_sd_express(host, &host->ios);
286 }
287
288 return 0;
289}
290
291int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
292{
293 int err;
294 struct mmc_command cmd = {};
295
296 cmd.opcode = SD_SEND_RELATIVE_ADDR;
297 cmd.arg = 0;
298 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
299
300 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
301 if (err)
302 return err;
303
304 *rca = cmd.resp[0] >> 16;
305
306 return 0;
307}
308
309int mmc_app_send_scr(struct mmc_card *card)
310{
311 int err;
312 struct mmc_request mrq = {};
313 struct mmc_command cmd = {};
314 struct mmc_data data = {};
315 struct scatterlist sg;
316 __be32 *scr;
317
318 /* NOTE: caller guarantees scr is heap-allocated */
319
320 err = mmc_app_cmd(card->host, card);
321 if (err)
322 return err;
323
324 /* dma onto stack is unsafe/nonportable, but callers to this
325 * routine normally provide temporary on-stack buffers ...
326 */
327 scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
328 if (!scr)
329 return -ENOMEM;
330
331 mrq.cmd = &cmd;
332 mrq.data = &data;
333
334 cmd.opcode = SD_APP_SEND_SCR;
335 cmd.arg = 0;
336 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
337
338 data.blksz = 8;
339 data.blocks = 1;
340 data.flags = MMC_DATA_READ;
341 data.sg = &sg;
342 data.sg_len = 1;
343
344 sg_init_one(&sg, scr, 8);
345
346 mmc_set_data_timeout(&data, card);
347
348 mmc_wait_for_req(card->host, &mrq);
349
350 card->raw_scr[0] = be32_to_cpu(scr[0]);
351 card->raw_scr[1] = be32_to_cpu(scr[1]);
352
353 kfree(scr);
354
355 if (cmd.error)
356 return cmd.error;
357 if (data.error)
358 return data.error;
359
360 return 0;
361}
362
363int mmc_sd_switch(struct mmc_card *card, bool mode, int group,
364 u8 value, u8 *resp)
365{
366 u32 cmd_args;
367
368 /* NOTE: caller guarantees resp is heap-allocated */
369
370 value &= 0xF;
371 cmd_args = mode << 31 | 0x00FFFFFF;
372 cmd_args &= ~(0xF << (group * 4));
373 cmd_args |= value << (group * 4);
374
375 return mmc_send_adtc_data(card, card->host, SD_SWITCH, cmd_args, resp,
376 64);
377}
378EXPORT_SYMBOL_GPL(mmc_sd_switch);
379
380int mmc_app_sd_status(struct mmc_card *card, void *ssr)
381{
382 int err;
383 struct mmc_request mrq = {};
384 struct mmc_command cmd = {};
385 struct mmc_data data = {};
386 struct scatterlist sg;
387
388 /* NOTE: caller guarantees ssr is heap-allocated */
389
390 err = mmc_app_cmd(card->host, card);
391 if (err)
392 return err;
393
394 mrq.cmd = &cmd;
395 mrq.data = &data;
396
397 cmd.opcode = SD_APP_SD_STATUS;
398 cmd.arg = 0;
399 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
400
401 data.blksz = 64;
402 data.blocks = 1;
403 data.flags = MMC_DATA_READ;
404 data.sg = &sg;
405 data.sg_len = 1;
406
407 sg_init_one(&sg, ssr, 64);
408
409 mmc_set_data_timeout(&data, card);
410
411 mmc_wait_for_req(card->host, &mrq);
412
413 if (cmd.error)
414 return cmd.error;
415 if (data.error)
416 return data.error;
417
418 return 0;
419}