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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}
326
327int mmc_app_sd_status(struct mmc_card *card, void *ssr)
328{
329 int err;
330 struct mmc_request mrq = {};
331 struct mmc_command cmd = {};
332 struct mmc_data data = {};
333 struct scatterlist sg;
334
335 /* NOTE: caller guarantees ssr is heap-allocated */
336
337 err = mmc_app_cmd(card->host, card);
338 if (err)
339 return err;
340
341 mrq.cmd = &cmd;
342 mrq.data = &data;
343
344 cmd.opcode = SD_APP_SD_STATUS;
345 cmd.arg = 0;
346 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
347
348 data.blksz = 64;
349 data.blocks = 1;
350 data.flags = MMC_DATA_READ;
351 data.sg = &sg;
352 data.sg_len = 1;
353
354 sg_init_one(&sg, ssr, 64);
355
356 mmc_set_data_timeout(&data, card);
357
358 mmc_wait_for_req(card->host, &mrq);
359
360 if (cmd.error)
361 return cmd.error;
362 if (data.error)
363 return data.error;
364
365 return 0;
366}
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}