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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 "sd_ops.h"
20#include "mmc_ops.h"
21
22int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
23{
24 int err;
25 struct mmc_command cmd = {};
26
27 if (WARN_ON(card && card->host != host))
28 return -EINVAL;
29
30 cmd.opcode = MMC_APP_CMD;
31
32 if (card) {
33 cmd.arg = card->rca << 16;
34 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
35 } else {
36 cmd.arg = 0;
37 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
38 }
39
40 err = mmc_wait_for_cmd(host, &cmd, 0);
41 if (err)
42 return err;
43
44 /* Check that card supported application commands */
45 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
46 return -EOPNOTSUPP;
47
48 return 0;
49}
50EXPORT_SYMBOL_GPL(mmc_app_cmd);
51
52static int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
53 struct mmc_command *cmd)
54{
55 struct mmc_request mrq = {};
56 int i, err = -EIO;
57
58 /*
59 * We have to resend MMC_APP_CMD for each attempt so
60 * we cannot use the retries field in mmc_command.
61 */
62 for (i = 0; i <= MMC_CMD_RETRIES; i++) {
63 err = mmc_app_cmd(host, card);
64 if (err) {
65 /* no point in retrying; no APP commands allowed */
66 if (mmc_host_is_spi(host)) {
67 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
68 break;
69 }
70 continue;
71 }
72
73 memset(&mrq, 0, sizeof(struct mmc_request));
74
75 memset(cmd->resp, 0, sizeof(cmd->resp));
76 cmd->retries = 0;
77
78 mrq.cmd = cmd;
79 cmd->data = NULL;
80
81 mmc_wait_for_req(host, &mrq);
82
83 err = cmd->error;
84 if (!cmd->error)
85 break;
86
87 /* no point in retrying illegal APP commands */
88 if (mmc_host_is_spi(host)) {
89 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
90 break;
91 }
92 }
93
94 return err;
95}
96
97int mmc_app_set_bus_width(struct mmc_card *card, int width)
98{
99 struct mmc_command cmd = {};
100
101 cmd.opcode = SD_APP_SET_BUS_WIDTH;
102 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
103
104 switch (width) {
105 case MMC_BUS_WIDTH_1:
106 cmd.arg = SD_BUS_WIDTH_1;
107 break;
108 case MMC_BUS_WIDTH_4:
109 cmd.arg = SD_BUS_WIDTH_4;
110 break;
111 default:
112 return -EINVAL;
113 }
114
115 return mmc_wait_for_app_cmd(card->host, card, &cmd);
116}
117
118int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
119{
120 struct mmc_command cmd = {};
121 int i, err = 0;
122
123 cmd.opcode = SD_APP_OP_COND;
124 if (mmc_host_is_spi(host))
125 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
126 else
127 cmd.arg = ocr;
128 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
129
130 for (i = 100; i; i--) {
131 err = mmc_wait_for_app_cmd(host, NULL, &cmd);
132 if (err)
133 break;
134
135 /* if we're just probing, do a single pass */
136 if (ocr == 0)
137 break;
138
139 /* otherwise wait until reset completes */
140 if (mmc_host_is_spi(host)) {
141 if (!(cmd.resp[0] & R1_SPI_IDLE))
142 break;
143 } else {
144 if (cmd.resp[0] & MMC_CARD_BUSY)
145 break;
146 }
147
148 err = -ETIMEDOUT;
149
150 mmc_delay(10);
151 }
152
153 if (!i)
154 pr_err("%s: card never left busy state\n", mmc_hostname(host));
155
156 if (rocr && !mmc_host_is_spi(host))
157 *rocr = cmd.resp[0];
158
159 return err;
160}
161
162static int __mmc_send_if_cond(struct mmc_host *host, u32 ocr, u8 pcie_bits,
163 u32 *resp)
164{
165 struct mmc_command cmd = {};
166 int err;
167 static const u8 test_pattern = 0xAA;
168 u8 result_pattern;
169
170 /*
171 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
172 * before SD_APP_OP_COND. This command will harmlessly fail for
173 * SD 1.0 cards.
174 */
175 cmd.opcode = SD_SEND_IF_COND;
176 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | pcie_bits << 8 | test_pattern;
177 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
178
179 err = mmc_wait_for_cmd(host, &cmd, 0);
180 if (err)
181 return err;
182
183 if (mmc_host_is_spi(host))
184 result_pattern = cmd.resp[1] & 0xFF;
185 else
186 result_pattern = cmd.resp[0] & 0xFF;
187
188 if (result_pattern != test_pattern)
189 return -EIO;
190
191 if (resp)
192 *resp = cmd.resp[0];
193
194 return 0;
195}
196
197int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
198{
199 return __mmc_send_if_cond(host, ocr, 0, NULL);
200}
201
202int mmc_send_if_cond_pcie(struct mmc_host *host, u32 ocr)
203{
204 u32 resp = 0;
205 u8 pcie_bits = 0;
206 int ret;
207
208 if (host->caps2 & MMC_CAP2_SD_EXP) {
209 /* Probe card for SD express support via PCIe. */
210 pcie_bits = 0x10;
211 if (host->caps2 & MMC_CAP2_SD_EXP_1_2V)
212 /* Probe also for 1.2V support. */
213 pcie_bits = 0x30;
214 }
215
216 ret = __mmc_send_if_cond(host, ocr, pcie_bits, &resp);
217 if (ret)
218 return 0;
219
220 /* Continue with the SD express init, if the card supports it. */
221 resp &= 0x3000;
222 if (pcie_bits && resp) {
223 if (resp == 0x3000)
224 host->ios.timing = MMC_TIMING_SD_EXP_1_2V;
225 else
226 host->ios.timing = MMC_TIMING_SD_EXP;
227
228 /*
229 * According to the spec the clock shall also be gated, but
230 * let's leave this to the host driver for more flexibility.
231 */
232 return host->ops->init_sd_express(host, &host->ios);
233 }
234
235 return 0;
236}
237
238int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
239{
240 int err;
241 struct mmc_command cmd = {};
242
243 cmd.opcode = SD_SEND_RELATIVE_ADDR;
244 cmd.arg = 0;
245 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
246
247 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
248 if (err)
249 return err;
250
251 *rca = cmd.resp[0] >> 16;
252
253 return 0;
254}
255
256int mmc_app_send_scr(struct mmc_card *card)
257{
258 int err;
259 struct mmc_request mrq = {};
260 struct mmc_command cmd = {};
261 struct mmc_data data = {};
262 struct scatterlist sg;
263 __be32 *scr;
264
265 /* NOTE: caller guarantees scr is heap-allocated */
266
267 err = mmc_app_cmd(card->host, card);
268 if (err)
269 return err;
270
271 /* dma onto stack is unsafe/nonportable, but callers to this
272 * routine normally provide temporary on-stack buffers ...
273 */
274 scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
275 if (!scr)
276 return -ENOMEM;
277
278 mrq.cmd = &cmd;
279 mrq.data = &data;
280
281 cmd.opcode = SD_APP_SEND_SCR;
282 cmd.arg = 0;
283 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
284
285 data.blksz = 8;
286 data.blocks = 1;
287 data.flags = MMC_DATA_READ;
288 data.sg = &sg;
289 data.sg_len = 1;
290
291 sg_init_one(&sg, scr, 8);
292
293 mmc_set_data_timeout(&data, card);
294
295 mmc_wait_for_req(card->host, &mrq);
296
297 card->raw_scr[0] = be32_to_cpu(scr[0]);
298 card->raw_scr[1] = be32_to_cpu(scr[1]);
299
300 kfree(scr);
301
302 if (cmd.error)
303 return cmd.error;
304 if (data.error)
305 return data.error;
306
307 return 0;
308}
309
310int mmc_sd_switch(struct mmc_card *card, int mode, int group,
311 u8 value, u8 *resp)
312{
313 u32 cmd_args;
314
315 /* NOTE: caller guarantees resp is heap-allocated */
316
317 mode = !!mode;
318 value &= 0xF;
319 cmd_args = mode << 31 | 0x00FFFFFF;
320 cmd_args &= ~(0xF << (group * 4));
321 cmd_args |= value << (group * 4);
322
323 return mmc_send_adtc_data(card, card->host, SD_SWITCH, cmd_args, resp,
324 64);
325}
326EXPORT_SYMBOL_GPL(mmc_sd_switch);
327
328int mmc_app_sd_status(struct mmc_card *card, void *ssr)
329{
330 int err;
331 struct mmc_request mrq = {};
332 struct mmc_command cmd = {};
333 struct mmc_data data = {};
334 struct scatterlist sg;
335
336 /* NOTE: caller guarantees ssr is heap-allocated */
337
338 err = mmc_app_cmd(card->host, card);
339 if (err)
340 return err;
341
342 mrq.cmd = &cmd;
343 mrq.data = &data;
344
345 cmd.opcode = SD_APP_SD_STATUS;
346 cmd.arg = 0;
347 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
348
349 data.blksz = 64;
350 data.blocks = 1;
351 data.flags = MMC_DATA_READ;
352 data.sg = &sg;
353 data.sg_len = 1;
354
355 sg_init_one(&sg, ssr, 64);
356
357 mmc_set_data_timeout(&data, card);
358
359 mmc_wait_for_req(card->host, &mrq);
360
361 if (cmd.error)
362 return cmd.error;
363 if (data.error)
364 return data.error;
365
366 return 0;
367}
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 "sd_ops.h"
20
21int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
22{
23 int err;
24 struct mmc_command cmd = {};
25
26 if (WARN_ON(card && card->host != host))
27 return -EINVAL;
28
29 cmd.opcode = MMC_APP_CMD;
30
31 if (card) {
32 cmd.arg = card->rca << 16;
33 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
34 } else {
35 cmd.arg = 0;
36 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
37 }
38
39 err = mmc_wait_for_cmd(host, &cmd, 0);
40 if (err)
41 return err;
42
43 /* Check that card supported application commands */
44 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
45 return -EOPNOTSUPP;
46
47 return 0;
48}
49EXPORT_SYMBOL_GPL(mmc_app_cmd);
50
51static int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
52 struct mmc_command *cmd)
53{
54 struct mmc_request mrq = {};
55 int i, err = -EIO;
56
57 /*
58 * We have to resend MMC_APP_CMD for each attempt so
59 * we cannot use the retries field in mmc_command.
60 */
61 for (i = 0; i <= MMC_CMD_RETRIES; i++) {
62 err = mmc_app_cmd(host, card);
63 if (err) {
64 /* no point in retrying; no APP commands allowed */
65 if (mmc_host_is_spi(host)) {
66 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
67 break;
68 }
69 continue;
70 }
71
72 memset(&mrq, 0, sizeof(struct mmc_request));
73
74 memset(cmd->resp, 0, sizeof(cmd->resp));
75 cmd->retries = 0;
76
77 mrq.cmd = cmd;
78 cmd->data = NULL;
79
80 mmc_wait_for_req(host, &mrq);
81
82 err = cmd->error;
83 if (!cmd->error)
84 break;
85
86 /* no point in retrying illegal APP commands */
87 if (mmc_host_is_spi(host)) {
88 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
89 break;
90 }
91 }
92
93 return err;
94}
95
96int mmc_app_set_bus_width(struct mmc_card *card, int width)
97{
98 struct mmc_command cmd = {};
99
100 cmd.opcode = SD_APP_SET_BUS_WIDTH;
101 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
102
103 switch (width) {
104 case MMC_BUS_WIDTH_1:
105 cmd.arg = SD_BUS_WIDTH_1;
106 break;
107 case MMC_BUS_WIDTH_4:
108 cmd.arg = SD_BUS_WIDTH_4;
109 break;
110 default:
111 return -EINVAL;
112 }
113
114 return mmc_wait_for_app_cmd(card->host, card, &cmd);
115}
116
117int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
118{
119 struct mmc_command cmd = {};
120 int i, err = 0;
121
122 cmd.opcode = SD_APP_OP_COND;
123 if (mmc_host_is_spi(host))
124 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
125 else
126 cmd.arg = ocr;
127 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
128
129 for (i = 100; i; i--) {
130 err = mmc_wait_for_app_cmd(host, NULL, &cmd);
131 if (err)
132 break;
133
134 /* if we're just probing, do a single pass */
135 if (ocr == 0)
136 break;
137
138 /* otherwise wait until reset completes */
139 if (mmc_host_is_spi(host)) {
140 if (!(cmd.resp[0] & R1_SPI_IDLE))
141 break;
142 } else {
143 if (cmd.resp[0] & MMC_CARD_BUSY)
144 break;
145 }
146
147 err = -ETIMEDOUT;
148
149 mmc_delay(10);
150 }
151
152 if (!i)
153 pr_err("%s: card never left busy state\n", mmc_hostname(host));
154
155 if (rocr && !mmc_host_is_spi(host))
156 *rocr = cmd.resp[0];
157
158 return err;
159}
160
161int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
162{
163 struct mmc_command cmd = {};
164 int err;
165 static const u8 test_pattern = 0xAA;
166 u8 result_pattern;
167
168 /*
169 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
170 * before SD_APP_OP_COND. This command will harmlessly fail for
171 * SD 1.0 cards.
172 */
173 cmd.opcode = SD_SEND_IF_COND;
174 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
175 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
176
177 err = mmc_wait_for_cmd(host, &cmd, 0);
178 if (err)
179 return err;
180
181 if (mmc_host_is_spi(host))
182 result_pattern = cmd.resp[1] & 0xFF;
183 else
184 result_pattern = cmd.resp[0] & 0xFF;
185
186 if (result_pattern != test_pattern)
187 return -EIO;
188
189 return 0;
190}
191
192int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
193{
194 int err;
195 struct mmc_command cmd = {};
196
197 cmd.opcode = SD_SEND_RELATIVE_ADDR;
198 cmd.arg = 0;
199 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
200
201 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
202 if (err)
203 return err;
204
205 *rca = cmd.resp[0] >> 16;
206
207 return 0;
208}
209
210int mmc_app_send_scr(struct mmc_card *card)
211{
212 int err;
213 struct mmc_request mrq = {};
214 struct mmc_command cmd = {};
215 struct mmc_data data = {};
216 struct scatterlist sg;
217 __be32 *scr;
218
219 /* NOTE: caller guarantees scr is heap-allocated */
220
221 err = mmc_app_cmd(card->host, card);
222 if (err)
223 return err;
224
225 /* dma onto stack is unsafe/nonportable, but callers to this
226 * routine normally provide temporary on-stack buffers ...
227 */
228 scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
229 if (!scr)
230 return -ENOMEM;
231
232 mrq.cmd = &cmd;
233 mrq.data = &data;
234
235 cmd.opcode = SD_APP_SEND_SCR;
236 cmd.arg = 0;
237 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
238
239 data.blksz = 8;
240 data.blocks = 1;
241 data.flags = MMC_DATA_READ;
242 data.sg = &sg;
243 data.sg_len = 1;
244
245 sg_init_one(&sg, scr, 8);
246
247 mmc_set_data_timeout(&data, card);
248
249 mmc_wait_for_req(card->host, &mrq);
250
251 card->raw_scr[0] = be32_to_cpu(scr[0]);
252 card->raw_scr[1] = be32_to_cpu(scr[1]);
253
254 kfree(scr);
255
256 if (cmd.error)
257 return cmd.error;
258 if (data.error)
259 return data.error;
260
261 return 0;
262}
263
264int mmc_sd_switch(struct mmc_card *card, int mode, int group,
265 u8 value, u8 *resp)
266{
267 struct mmc_request mrq = {};
268 struct mmc_command cmd = {};
269 struct mmc_data data = {};
270 struct scatterlist sg;
271
272 /* NOTE: caller guarantees resp is heap-allocated */
273
274 mode = !!mode;
275 value &= 0xF;
276
277 mrq.cmd = &cmd;
278 mrq.data = &data;
279
280 cmd.opcode = SD_SWITCH;
281 cmd.arg = mode << 31 | 0x00FFFFFF;
282 cmd.arg &= ~(0xF << (group * 4));
283 cmd.arg |= value << (group * 4);
284 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
285
286 data.blksz = 64;
287 data.blocks = 1;
288 data.flags = MMC_DATA_READ;
289 data.sg = &sg;
290 data.sg_len = 1;
291
292 sg_init_one(&sg, resp, 64);
293
294 mmc_set_data_timeout(&data, card);
295
296 mmc_wait_for_req(card->host, &mrq);
297
298 if (cmd.error)
299 return cmd.error;
300 if (data.error)
301 return data.error;
302
303 return 0;
304}
305
306int mmc_app_sd_status(struct mmc_card *card, void *ssr)
307{
308 int err;
309 struct mmc_request mrq = {};
310 struct mmc_command cmd = {};
311 struct mmc_data data = {};
312 struct scatterlist sg;
313
314 /* NOTE: caller guarantees ssr is heap-allocated */
315
316 err = mmc_app_cmd(card->host, card);
317 if (err)
318 return err;
319
320 mrq.cmd = &cmd;
321 mrq.data = &data;
322
323 cmd.opcode = SD_APP_SD_STATUS;
324 cmd.arg = 0;
325 cmd.flags = MMC_RSP_SPI_R2 | 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, ssr, 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}