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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/*
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 = {};
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 = {};
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 = {};
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 = {};
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 = {};
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 = {};
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)
236{
237 int err;
238 struct mmc_request mrq = {};
239 struct mmc_command cmd = {};
240 struct mmc_data data = {};
241 struct scatterlist sg;
242 __be32 *scr;
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 scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
254 if (!scr)
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, scr, 8);
271
272 mmc_set_data_timeout(&data, card);
273
274 mmc_wait_for_req(card->host, &mrq);
275
276 card->raw_scr[0] = be32_to_cpu(scr[0]);
277 card->raw_scr[1] = be32_to_cpu(scr[1]);
278
279 kfree(scr);
280
281 if (cmd.error)
282 return cmd.error;
283 if (data.error)
284 return data.error;
285
286 return 0;
287}
288
289int mmc_sd_switch(struct mmc_card *card, int mode, int group,
290 u8 value, u8 *resp)
291{
292 struct mmc_request mrq = {};
293 struct mmc_command cmd = {};
294 struct mmc_data data = {};
295 struct scatterlist sg;
296
297 /* NOTE: caller guarantees resp is heap-allocated */
298
299 mode = !!mode;
300 value &= 0xF;
301
302 mrq.cmd = &cmd;
303 mrq.data = &data;
304
305 cmd.opcode = SD_SWITCH;
306 cmd.arg = mode << 31 | 0x00FFFFFF;
307 cmd.arg &= ~(0xF << (group * 4));
308 cmd.arg |= value << (group * 4);
309 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
310
311 data.blksz = 64;
312 data.blocks = 1;
313 data.flags = MMC_DATA_READ;
314 data.sg = &sg;
315 data.sg_len = 1;
316
317 sg_init_one(&sg, resp, 64);
318
319 mmc_set_data_timeout(&data, card);
320
321 mmc_wait_for_req(card->host, &mrq);
322
323 if (cmd.error)
324 return cmd.error;
325 if (data.error)
326 return data.error;
327
328 return 0;
329}
330
331int mmc_app_sd_status(struct mmc_card *card, void *ssr)
332{
333 int err;
334 struct mmc_request mrq = {};
335 struct mmc_command cmd = {};
336 struct mmc_data data = {};
337 struct scatterlist sg;
338
339 /* NOTE: caller guarantees ssr is heap-allocated */
340
341 err = mmc_app_cmd(card->host, card);
342 if (err)
343 return err;
344
345 mrq.cmd = &cmd;
346 mrq.data = &data;
347
348 cmd.opcode = SD_APP_SD_STATUS;
349 cmd.arg = 0;
350 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
351
352 data.blksz = 64;
353 data.blocks = 1;
354 data.flags = MMC_DATA_READ;
355 data.sg = &sg;
356 data.sg_len = 1;
357
358 sg_init_one(&sg, ssr, 64);
359
360 mmc_set_data_timeout(&data, card);
361
362 mmc_wait_for_req(card->host, &mrq);
363
364 if (cmd.error)
365 return cmd.error;
366 if (data.error)
367 return data.error;
368
369 return 0;
370}