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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/scatterlist.h>
15
16#include <linux/mmc/host.h>
17#include <linux/mmc/card.h>
18#include <linux/mmc/mmc.h>
19#include <linux/mmc/sd.h>
20
21#include "core.h"
22#include "sd_ops.h"
23
24int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
25{
26 int err;
27 struct mmc_command cmd = {0};
28
29 BUG_ON(!host);
30 BUG_ON(card && (card->host != host));
31
32 cmd.opcode = MMC_APP_CMD;
33
34 if (card) {
35 cmd.arg = card->rca << 16;
36 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
37 } else {
38 cmd.arg = 0;
39 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
40 }
41
42 err = mmc_wait_for_cmd(host, &cmd, 0);
43 if (err)
44 return err;
45
46 /* Check that card supported application commands */
47 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
48 return -EOPNOTSUPP;
49
50 return 0;
51}
52EXPORT_SYMBOL_GPL(mmc_app_cmd);
53
54/**
55 * mmc_wait_for_app_cmd - start an application command and wait for
56 completion
57 * @host: MMC host to start command
58 * @card: Card to send MMC_APP_CMD to
59 * @cmd: MMC command to start
60 * @retries: maximum number of retries
61 *
62 * Sends a MMC_APP_CMD, checks the card response, sends the command
63 * in the parameter and waits for it to complete. Return any error
64 * that occurred while the command was executing. Do not attempt to
65 * parse the response.
66 */
67int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
68 struct mmc_command *cmd, int retries)
69{
70 struct mmc_request mrq = {0};
71
72 int i, err;
73
74 BUG_ON(!cmd);
75 BUG_ON(retries < 0);
76
77 err = -EIO;
78
79 /*
80 * We have to resend MMC_APP_CMD for each attempt so
81 * we cannot use the retries field in mmc_command.
82 */
83 for (i = 0;i <= retries;i++) {
84 err = mmc_app_cmd(host, card);
85 if (err) {
86 /* no point in retrying; no APP commands allowed */
87 if (mmc_host_is_spi(host)) {
88 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
89 break;
90 }
91 continue;
92 }
93
94 memset(&mrq, 0, sizeof(struct mmc_request));
95
96 memset(cmd->resp, 0, sizeof(cmd->resp));
97 cmd->retries = 0;
98
99 mrq.cmd = cmd;
100 cmd->data = NULL;
101
102 mmc_wait_for_req(host, &mrq);
103
104 err = cmd->error;
105 if (!cmd->error)
106 break;
107
108 /* no point in retrying illegal APP commands */
109 if (mmc_host_is_spi(host)) {
110 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
111 break;
112 }
113 }
114
115 return err;
116}
117
118EXPORT_SYMBOL(mmc_wait_for_app_cmd);
119
120int mmc_app_set_bus_width(struct mmc_card *card, int width)
121{
122 int err;
123 struct mmc_command cmd = {0};
124
125 BUG_ON(!card);
126 BUG_ON(!card->host);
127
128 cmd.opcode = SD_APP_SET_BUS_WIDTH;
129 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
130
131 switch (width) {
132 case MMC_BUS_WIDTH_1:
133 cmd.arg = SD_BUS_WIDTH_1;
134 break;
135 case MMC_BUS_WIDTH_4:
136 cmd.arg = SD_BUS_WIDTH_4;
137 break;
138 default:
139 return -EINVAL;
140 }
141
142 err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
143 if (err)
144 return err;
145
146 return 0;
147}
148
149int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
150{
151 struct mmc_command cmd = {0};
152 int i, err = 0;
153
154 BUG_ON(!host);
155
156 cmd.opcode = SD_APP_OP_COND;
157 if (mmc_host_is_spi(host))
158 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
159 else
160 cmd.arg = ocr;
161 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
162
163 for (i = 100; i; i--) {
164 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
165 if (err)
166 break;
167
168 /* if we're just probing, do a single pass */
169 if (ocr == 0)
170 break;
171
172 /* otherwise wait until reset completes */
173 if (mmc_host_is_spi(host)) {
174 if (!(cmd.resp[0] & R1_SPI_IDLE))
175 break;
176 } else {
177 if (cmd.resp[0] & MMC_CARD_BUSY)
178 break;
179 }
180
181 err = -ETIMEDOUT;
182
183 mmc_delay(10);
184 }
185
186 if (rocr && !mmc_host_is_spi(host))
187 *rocr = cmd.resp[0];
188
189 return err;
190}
191
192int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
193{
194 struct mmc_command cmd = {0};
195 int err;
196 static const u8 test_pattern = 0xAA;
197 u8 result_pattern;
198
199 /*
200 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
201 * before SD_APP_OP_COND. This command will harmlessly fail for
202 * SD 1.0 cards.
203 */
204 cmd.opcode = SD_SEND_IF_COND;
205 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
206 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
207
208 err = mmc_wait_for_cmd(host, &cmd, 0);
209 if (err)
210 return err;
211
212 if (mmc_host_is_spi(host))
213 result_pattern = cmd.resp[1] & 0xFF;
214 else
215 result_pattern = cmd.resp[0] & 0xFF;
216
217 if (result_pattern != test_pattern)
218 return -EIO;
219
220 return 0;
221}
222
223int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
224{
225 int err;
226 struct mmc_command cmd = {0};
227
228 BUG_ON(!host);
229 BUG_ON(!rca);
230
231 cmd.opcode = SD_SEND_RELATIVE_ADDR;
232 cmd.arg = 0;
233 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
234
235 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
236 if (err)
237 return err;
238
239 *rca = cmd.resp[0] >> 16;
240
241 return 0;
242}
243
244int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
245{
246 int err;
247 struct mmc_request mrq = {0};
248 struct mmc_command cmd = {0};
249 struct mmc_data data = {0};
250 struct scatterlist sg;
251 void *data_buf;
252
253 BUG_ON(!card);
254 BUG_ON(!card->host);
255 BUG_ON(!scr);
256
257 /* NOTE: caller guarantees scr is heap-allocated */
258
259 err = mmc_app_cmd(card->host, card);
260 if (err)
261 return err;
262
263 /* dma onto stack is unsafe/nonportable, but callers to this
264 * routine normally provide temporary on-stack buffers ...
265 */
266 data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
267 if (data_buf == NULL)
268 return -ENOMEM;
269
270 mrq.cmd = &cmd;
271 mrq.data = &data;
272
273 cmd.opcode = SD_APP_SEND_SCR;
274 cmd.arg = 0;
275 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
276
277 data.blksz = 8;
278 data.blocks = 1;
279 data.flags = MMC_DATA_READ;
280 data.sg = &sg;
281 data.sg_len = 1;
282
283 sg_init_one(&sg, data_buf, 8);
284
285 mmc_set_data_timeout(&data, card);
286
287 mmc_wait_for_req(card->host, &mrq);
288
289 memcpy(scr, data_buf, sizeof(card->raw_scr));
290 kfree(data_buf);
291
292 if (cmd.error)
293 return cmd.error;
294 if (data.error)
295 return data.error;
296
297 scr[0] = be32_to_cpu(scr[0]);
298 scr[1] = be32_to_cpu(scr[1]);
299
300 return 0;
301}
302
303int mmc_sd_switch(struct mmc_card *card, int mode, int group,
304 u8 value, u8 *resp)
305{
306 struct mmc_request mrq = {0};
307 struct mmc_command cmd = {0};
308 struct mmc_data data = {0};
309 struct scatterlist sg;
310
311 BUG_ON(!card);
312 BUG_ON(!card->host);
313
314 /* NOTE: caller guarantees resp is heap-allocated */
315
316 mode = !!mode;
317 value &= 0xF;
318
319 mrq.cmd = &cmd;
320 mrq.data = &data;
321
322 cmd.opcode = SD_SWITCH;
323 cmd.arg = mode << 31 | 0x00FFFFFF;
324 cmd.arg &= ~(0xF << (group * 4));
325 cmd.arg |= value << (group * 4);
326 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
327
328 data.blksz = 64;
329 data.blocks = 1;
330 data.flags = MMC_DATA_READ;
331 data.sg = &sg;
332 data.sg_len = 1;
333
334 sg_init_one(&sg, resp, 64);
335
336 mmc_set_data_timeout(&data, card);
337
338 mmc_wait_for_req(card->host, &mrq);
339
340 if (cmd.error)
341 return cmd.error;
342 if (data.error)
343 return data.error;
344
345 return 0;
346}
347
348int mmc_app_sd_status(struct mmc_card *card, void *ssr)
349{
350 int err;
351 struct mmc_request mrq = {0};
352 struct mmc_command cmd = {0};
353 struct mmc_data data = {0};
354 struct scatterlist sg;
355
356 BUG_ON(!card);
357 BUG_ON(!card->host);
358 BUG_ON(!ssr);
359
360 /* NOTE: caller guarantees ssr is heap-allocated */
361
362 err = mmc_app_cmd(card->host, card);
363 if (err)
364 return err;
365
366 mrq.cmd = &cmd;
367 mrq.data = &data;
368
369 cmd.opcode = SD_APP_SD_STATUS;
370 cmd.arg = 0;
371 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
372
373 data.blksz = 64;
374 data.blocks = 1;
375 data.flags = MMC_DATA_READ;
376 data.sg = &sg;
377 data.sg_len = 1;
378
379 sg_init_one(&sg, ssr, 64);
380
381 mmc_set_data_timeout(&data, card);
382
383 mmc_wait_for_req(card->host, &mrq);
384
385 if (cmd.error)
386 return cmd.error;
387 if (data.error)
388 return data.error;
389
390 return 0;
391}
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 if (WARN_ON(card && card->host != host))
31 return -EINVAL;
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 if (retries < 0)
76 retries = MMC_CMD_RETRIES;
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 struct mmc_command cmd = {0};
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, MMC_CMD_RETRIES);
140}
141
142int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
143{
144 struct mmc_command cmd = {0};
145 int i, err = 0;
146
147 cmd.opcode = SD_APP_OP_COND;
148 if (mmc_host_is_spi(host))
149 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
150 else
151 cmd.arg = ocr;
152 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
153
154 for (i = 100; i; i--) {
155 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
156 if (err)
157 break;
158
159 /* if we're just probing, do a single pass */
160 if (ocr == 0)
161 break;
162
163 /* otherwise wait until reset completes */
164 if (mmc_host_is_spi(host)) {
165 if (!(cmd.resp[0] & R1_SPI_IDLE))
166 break;
167 } else {
168 if (cmd.resp[0] & MMC_CARD_BUSY)
169 break;
170 }
171
172 err = -ETIMEDOUT;
173
174 mmc_delay(10);
175 }
176
177 if (!i)
178 pr_err("%s: card never left busy state\n", mmc_hostname(host));
179
180 if (rocr && !mmc_host_is_spi(host))
181 *rocr = cmd.resp[0];
182
183 return err;
184}
185
186int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
187{
188 struct mmc_command cmd = {0};
189 int err;
190 static const u8 test_pattern = 0xAA;
191 u8 result_pattern;
192
193 /*
194 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
195 * before SD_APP_OP_COND. This command will harmlessly fail for
196 * SD 1.0 cards.
197 */
198 cmd.opcode = SD_SEND_IF_COND;
199 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
200 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
201
202 err = mmc_wait_for_cmd(host, &cmd, 0);
203 if (err)
204 return err;
205
206 if (mmc_host_is_spi(host))
207 result_pattern = cmd.resp[1] & 0xFF;
208 else
209 result_pattern = cmd.resp[0] & 0xFF;
210
211 if (result_pattern != test_pattern)
212 return -EIO;
213
214 return 0;
215}
216
217int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
218{
219 int err;
220 struct mmc_command cmd = {0};
221
222 cmd.opcode = SD_SEND_RELATIVE_ADDR;
223 cmd.arg = 0;
224 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
225
226 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
227 if (err)
228 return err;
229
230 *rca = cmd.resp[0] >> 16;
231
232 return 0;
233}
234
235int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
236{
237 int err;
238 struct mmc_request mrq = {NULL};
239 struct mmc_command cmd = {0};
240 struct mmc_data data = {0};
241 struct scatterlist sg;
242 void *data_buf;
243
244 /* NOTE: caller guarantees scr is heap-allocated */
245
246 err = mmc_app_cmd(card->host, card);
247 if (err)
248 return err;
249
250 /* dma onto stack is unsafe/nonportable, but callers to this
251 * routine normally provide temporary on-stack buffers ...
252 */
253 data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
254 if (data_buf == NULL)
255 return -ENOMEM;
256
257 mrq.cmd = &cmd;
258 mrq.data = &data;
259
260 cmd.opcode = SD_APP_SEND_SCR;
261 cmd.arg = 0;
262 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
263
264 data.blksz = 8;
265 data.blocks = 1;
266 data.flags = MMC_DATA_READ;
267 data.sg = &sg;
268 data.sg_len = 1;
269
270 sg_init_one(&sg, data_buf, 8);
271
272 mmc_set_data_timeout(&data, card);
273
274 mmc_wait_for_req(card->host, &mrq);
275
276 memcpy(scr, data_buf, sizeof(card->raw_scr));
277 kfree(data_buf);
278
279 if (cmd.error)
280 return cmd.error;
281 if (data.error)
282 return data.error;
283
284 scr[0] = be32_to_cpu(scr[0]);
285 scr[1] = be32_to_cpu(scr[1]);
286
287 return 0;
288}
289
290int mmc_sd_switch(struct mmc_card *card, int mode, int group,
291 u8 value, u8 *resp)
292{
293 struct mmc_request mrq = {NULL};
294 struct mmc_command cmd = {0};
295 struct mmc_data data = {0};
296 struct scatterlist sg;
297
298 /* NOTE: caller guarantees resp is heap-allocated */
299
300 mode = !!mode;
301 value &= 0xF;
302
303 mrq.cmd = &cmd;
304 mrq.data = &data;
305
306 cmd.opcode = SD_SWITCH;
307 cmd.arg = mode << 31 | 0x00FFFFFF;
308 cmd.arg &= ~(0xF << (group * 4));
309 cmd.arg |= value << (group * 4);
310 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
311
312 data.blksz = 64;
313 data.blocks = 1;
314 data.flags = MMC_DATA_READ;
315 data.sg = &sg;
316 data.sg_len = 1;
317
318 sg_init_one(&sg, resp, 64);
319
320 mmc_set_data_timeout(&data, card);
321
322 mmc_wait_for_req(card->host, &mrq);
323
324 if (cmd.error)
325 return cmd.error;
326 if (data.error)
327 return data.error;
328
329 return 0;
330}
331
332int mmc_app_sd_status(struct mmc_card *card, void *ssr)
333{
334 int err;
335 struct mmc_request mrq = {NULL};
336 struct mmc_command cmd = {0};
337 struct mmc_data data = {0};
338 struct scatterlist sg;
339
340 /* NOTE: caller guarantees ssr is heap-allocated */
341
342 err = mmc_app_cmd(card->host, card);
343 if (err)
344 return err;
345
346 mrq.cmd = &cmd;
347 mrq.data = &data;
348
349 cmd.opcode = SD_APP_SD_STATUS;
350 cmd.arg = 0;
351 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
352
353 data.blksz = 64;
354 data.blocks = 1;
355 data.flags = MMC_DATA_READ;
356 data.sg = &sg;
357 data.sg_len = 1;
358
359 sg_init_one(&sg, ssr, 64);
360
361 mmc_set_data_timeout(&data, card);
362
363 mmc_wait_for_req(card->host, &mrq);
364
365 if (cmd.error)
366 return cmd.error;
367 if (data.error)
368 return data.error;
369
370 return 0;
371}