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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 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 return mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
143}
144
145int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
146{
147 struct mmc_command cmd = {0};
148 int i, err = 0;
149
150 BUG_ON(!host);
151
152 cmd.opcode = SD_APP_OP_COND;
153 if (mmc_host_is_spi(host))
154 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
155 else
156 cmd.arg = ocr;
157 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
158
159 for (i = 100; i; i--) {
160 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
161 if (err)
162 break;
163
164 /* if we're just probing, do a single pass */
165 if (ocr == 0)
166 break;
167
168 /* otherwise wait until reset completes */
169 if (mmc_host_is_spi(host)) {
170 if (!(cmd.resp[0] & R1_SPI_IDLE))
171 break;
172 } else {
173 if (cmd.resp[0] & MMC_CARD_BUSY)
174 break;
175 }
176
177 err = -ETIMEDOUT;
178
179 mmc_delay(10);
180 }
181
182 if (!i)
183 pr_err("%s: card never left busy state\n", mmc_hostname(host));
184
185 if (rocr && !mmc_host_is_spi(host))
186 *rocr = cmd.resp[0];
187
188 return err;
189}
190
191int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
192{
193 struct mmc_command cmd = {0};
194 int err;
195 static const u8 test_pattern = 0xAA;
196 u8 result_pattern;
197
198 /*
199 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
200 * before SD_APP_OP_COND. This command will harmlessly fail for
201 * SD 1.0 cards.
202 */
203 cmd.opcode = SD_SEND_IF_COND;
204 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
205 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
206
207 err = mmc_wait_for_cmd(host, &cmd, 0);
208 if (err)
209 return err;
210
211 if (mmc_host_is_spi(host))
212 result_pattern = cmd.resp[1] & 0xFF;
213 else
214 result_pattern = cmd.resp[0] & 0xFF;
215
216 if (result_pattern != test_pattern)
217 return -EIO;
218
219 return 0;
220}
221
222int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
223{
224 int err;
225 struct mmc_command cmd = {0};
226
227 BUG_ON(!host);
228 BUG_ON(!rca);
229
230 cmd.opcode = SD_SEND_RELATIVE_ADDR;
231 cmd.arg = 0;
232 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
233
234 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
235 if (err)
236 return err;
237
238 *rca = cmd.resp[0] >> 16;
239
240 return 0;
241}
242
243int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
244{
245 int err;
246 struct mmc_request mrq = {NULL};
247 struct mmc_command cmd = {0};
248 struct mmc_data data = {0};
249 struct scatterlist sg;
250 void *data_buf;
251
252 BUG_ON(!card);
253 BUG_ON(!card->host);
254 BUG_ON(!scr);
255
256 /* NOTE: caller guarantees scr is heap-allocated */
257
258 err = mmc_app_cmd(card->host, card);
259 if (err)
260 return err;
261
262 /* dma onto stack is unsafe/nonportable, but callers to this
263 * routine normally provide temporary on-stack buffers ...
264 */
265 data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
266 if (data_buf == NULL)
267 return -ENOMEM;
268
269 mrq.cmd = &cmd;
270 mrq.data = &data;
271
272 cmd.opcode = SD_APP_SEND_SCR;
273 cmd.arg = 0;
274 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
275
276 data.blksz = 8;
277 data.blocks = 1;
278 data.flags = MMC_DATA_READ;
279 data.sg = &sg;
280 data.sg_len = 1;
281
282 sg_init_one(&sg, data_buf, 8);
283
284 mmc_set_data_timeout(&data, card);
285
286 mmc_wait_for_req(card->host, &mrq);
287
288 memcpy(scr, data_buf, sizeof(card->raw_scr));
289 kfree(data_buf);
290
291 if (cmd.error)
292 return cmd.error;
293 if (data.error)
294 return data.error;
295
296 scr[0] = be32_to_cpu(scr[0]);
297 scr[1] = be32_to_cpu(scr[1]);
298
299 return 0;
300}
301
302int mmc_sd_switch(struct mmc_card *card, int mode, int group,
303 u8 value, u8 *resp)
304{
305 struct mmc_request mrq = {NULL};
306 struct mmc_command cmd = {0};
307 struct mmc_data data = {0};
308 struct scatterlist sg;
309
310 BUG_ON(!card);
311 BUG_ON(!card->host);
312
313 /* NOTE: caller guarantees resp is heap-allocated */
314
315 mode = !!mode;
316 value &= 0xF;
317
318 mrq.cmd = &cmd;
319 mrq.data = &data;
320
321 cmd.opcode = SD_SWITCH;
322 cmd.arg = mode << 31 | 0x00FFFFFF;
323 cmd.arg &= ~(0xF << (group * 4));
324 cmd.arg |= value << (group * 4);
325 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
326
327 data.blksz = 64;
328 data.blocks = 1;
329 data.flags = MMC_DATA_READ;
330 data.sg = &sg;
331 data.sg_len = 1;
332
333 sg_init_one(&sg, resp, 64);
334
335 mmc_set_data_timeout(&data, card);
336
337 mmc_wait_for_req(card->host, &mrq);
338
339 if (cmd.error)
340 return cmd.error;
341 if (data.error)
342 return data.error;
343
344 return 0;
345}
346
347int mmc_app_sd_status(struct mmc_card *card, void *ssr)
348{
349 int err;
350 struct mmc_request mrq = {NULL};
351 struct mmc_command cmd = {0};
352 struct mmc_data data = {0};
353 struct scatterlist sg;
354
355 BUG_ON(!card);
356 BUG_ON(!card->host);
357 BUG_ON(!ssr);
358
359 /* NOTE: caller guarantees ssr is heap-allocated */
360
361 err = mmc_app_cmd(card->host, card);
362 if (err)
363 return err;
364
365 mrq.cmd = &cmd;
366 mrq.data = &data;
367
368 cmd.opcode = SD_APP_SD_STATUS;
369 cmd.arg = 0;
370 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
371
372 data.blksz = 64;
373 data.blocks = 1;
374 data.flags = MMC_DATA_READ;
375 data.sg = &sg;
376 data.sg_len = 1;
377
378 sg_init_one(&sg, ssr, 64);
379
380 mmc_set_data_timeout(&data, card);
381
382 mmc_wait_for_req(card->host, &mrq);
383
384 if (cmd.error)
385 return cmd.error;
386 if (data.error)
387 return data.error;
388
389 return 0;
390}
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 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 return mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
143}
144
145int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
146{
147 struct mmc_command cmd = {0};
148 int i, err = 0;
149
150 BUG_ON(!host);
151
152 cmd.opcode = SD_APP_OP_COND;
153 if (mmc_host_is_spi(host))
154 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
155 else
156 cmd.arg = ocr;
157 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
158
159 for (i = 100; i; i--) {
160 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
161 if (err)
162 break;
163
164 /* if we're just probing, do a single pass */
165 if (ocr == 0)
166 break;
167
168 /* otherwise wait until reset completes */
169 if (mmc_host_is_spi(host)) {
170 if (!(cmd.resp[0] & R1_SPI_IDLE))
171 break;
172 } else {
173 if (cmd.resp[0] & MMC_CARD_BUSY)
174 break;
175 }
176
177 err = -ETIMEDOUT;
178
179 mmc_delay(10);
180 }
181
182 if (!i)
183 pr_err("%s: card never left busy state\n", mmc_hostname(host));
184
185 if (rocr && !mmc_host_is_spi(host))
186 *rocr = cmd.resp[0];
187
188 return err;
189}
190
191int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
192{
193 struct mmc_command cmd = {0};
194 int err;
195 static const u8 test_pattern = 0xAA;
196 u8 result_pattern;
197
198 /*
199 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
200 * before SD_APP_OP_COND. This command will harmlessly fail for
201 * SD 1.0 cards.
202 */
203 cmd.opcode = SD_SEND_IF_COND;
204 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
205 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
206
207 err = mmc_wait_for_cmd(host, &cmd, 0);
208 if (err)
209 return err;
210
211 if (mmc_host_is_spi(host))
212 result_pattern = cmd.resp[1] & 0xFF;
213 else
214 result_pattern = cmd.resp[0] & 0xFF;
215
216 if (result_pattern != test_pattern)
217 return -EIO;
218
219 return 0;
220}
221
222int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
223{
224 int err;
225 struct mmc_command cmd = {0};
226
227 BUG_ON(!host);
228 BUG_ON(!rca);
229
230 cmd.opcode = SD_SEND_RELATIVE_ADDR;
231 cmd.arg = 0;
232 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
233
234 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
235 if (err)
236 return err;
237
238 *rca = cmd.resp[0] >> 16;
239
240 return 0;
241}
242
243int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
244{
245 int err;
246 struct mmc_request mrq = {NULL};
247 struct mmc_command cmd = {0};
248 struct mmc_data data = {0};
249 struct scatterlist sg;
250 void *data_buf;
251
252 BUG_ON(!card);
253 BUG_ON(!card->host);
254 BUG_ON(!scr);
255
256 /* NOTE: caller guarantees scr is heap-allocated */
257
258 err = mmc_app_cmd(card->host, card);
259 if (err)
260 return err;
261
262 /* dma onto stack is unsafe/nonportable, but callers to this
263 * routine normally provide temporary on-stack buffers ...
264 */
265 data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
266 if (data_buf == NULL)
267 return -ENOMEM;
268
269 mrq.cmd = &cmd;
270 mrq.data = &data;
271
272 cmd.opcode = SD_APP_SEND_SCR;
273 cmd.arg = 0;
274 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
275
276 data.blksz = 8;
277 data.blocks = 1;
278 data.flags = MMC_DATA_READ;
279 data.sg = &sg;
280 data.sg_len = 1;
281
282 sg_init_one(&sg, data_buf, 8);
283
284 mmc_set_data_timeout(&data, card);
285
286 mmc_wait_for_req(card->host, &mrq);
287
288 memcpy(scr, data_buf, sizeof(card->raw_scr));
289 kfree(data_buf);
290
291 if (cmd.error)
292 return cmd.error;
293 if (data.error)
294 return data.error;
295
296 scr[0] = be32_to_cpu(scr[0]);
297 scr[1] = be32_to_cpu(scr[1]);
298
299 return 0;
300}
301
302int mmc_sd_switch(struct mmc_card *card, int mode, int group,
303 u8 value, u8 *resp)
304{
305 struct mmc_request mrq = {NULL};
306 struct mmc_command cmd = {0};
307 struct mmc_data data = {0};
308 struct scatterlist sg;
309
310 BUG_ON(!card);
311 BUG_ON(!card->host);
312
313 /* NOTE: caller guarantees resp is heap-allocated */
314
315 mode = !!mode;
316 value &= 0xF;
317
318 mrq.cmd = &cmd;
319 mrq.data = &data;
320
321 cmd.opcode = SD_SWITCH;
322 cmd.arg = mode << 31 | 0x00FFFFFF;
323 cmd.arg &= ~(0xF << (group * 4));
324 cmd.arg |= value << (group * 4);
325 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
326
327 data.blksz = 64;
328 data.blocks = 1;
329 data.flags = MMC_DATA_READ;
330 data.sg = &sg;
331 data.sg_len = 1;
332
333 sg_init_one(&sg, resp, 64);
334
335 mmc_set_data_timeout(&data, card);
336
337 mmc_wait_for_req(card->host, &mrq);
338
339 if (cmd.error)
340 return cmd.error;
341 if (data.error)
342 return data.error;
343
344 return 0;
345}
346
347int mmc_app_sd_status(struct mmc_card *card, void *ssr)
348{
349 int err;
350 struct mmc_request mrq = {NULL};
351 struct mmc_command cmd = {0};
352 struct mmc_data data = {0};
353 struct scatterlist sg;
354
355 BUG_ON(!card);
356 BUG_ON(!card->host);
357 BUG_ON(!ssr);
358
359 /* NOTE: caller guarantees ssr is heap-allocated */
360
361 err = mmc_app_cmd(card->host, card);
362 if (err)
363 return err;
364
365 mrq.cmd = &cmd;
366 mrq.data = &data;
367
368 cmd.opcode = SD_APP_SD_STATUS;
369 cmd.arg = 0;
370 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
371
372 data.blksz = 64;
373 data.blocks = 1;
374 data.flags = MMC_DATA_READ;
375 data.sg = &sg;
376 data.sg_len = 1;
377
378 sg_init_one(&sg, ssr, 64);
379
380 mmc_set_data_timeout(&data, card);
381
382 mmc_wait_for_req(card->host, &mrq);
383
384 if (cmd.error)
385 return cmd.error;
386 if (data.error)
387 return data.error;
388
389 return 0;
390}