2 * linux/drivers/mmc/core/sd_ops.h
4 * Copyright 2006-2007 Pierre Ossman
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.
12 #include <linux/types.h>
13 #include <linux/scatterlist.h>
15 #include <linux/mmc/host.h>
16 #include <linux/mmc/card.h>
17 #include <linux/mmc/mmc.h>
18 #include <linux/mmc/sd.h>
23 int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
26 struct mmc_command cmd;
29 BUG_ON(card && (card->host != host));
31 cmd.opcode = MMC_APP_CMD;
34 cmd.arg = card->rca << 16;
35 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
38 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
41 err = mmc_wait_for_cmd(host, &cmd, 0);
45 /* Check that card supported application commands */
46 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
51 EXPORT_SYMBOL_GPL(mmc_app_cmd);
54 * mmc_wait_for_app_cmd - start an application command and wait for
56 * @host: MMC host to start command
57 * @card: Card to send MMC_APP_CMD to
58 * @cmd: MMC command to start
59 * @retries: maximum number of retries
61 * Sends a MMC_APP_CMD, checks the card response, sends the command
62 * in the parameter and waits for it to complete. Return any error
63 * that occurred while the command was executing. Do not attempt to
66 int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
67 struct mmc_command *cmd, int retries)
69 struct mmc_request mrq;
79 * We have to resend MMC_APP_CMD for each attempt so
80 * we cannot use the retries field in mmc_command.
82 for (i = 0;i <= retries;i++) {
83 err = mmc_app_cmd(host, card);
85 /* no point in retrying; no APP commands allowed */
86 if (mmc_host_is_spi(host)) {
87 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
93 memset(&mrq, 0, sizeof(struct mmc_request));
95 memset(cmd->resp, 0, sizeof(cmd->resp));
101 mmc_wait_for_req(host, &mrq);
107 /* no point in retrying illegal APP commands */
108 if (mmc_host_is_spi(host)) {
109 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
117 EXPORT_SYMBOL(mmc_wait_for_app_cmd);
119 int mmc_app_set_bus_width(struct mmc_card *card, int width)
122 struct mmc_command cmd;
127 memset(&cmd, 0, sizeof(struct mmc_command));
129 cmd.opcode = SD_APP_SET_BUS_WIDTH;
130 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
133 case MMC_BUS_WIDTH_1:
134 cmd.arg = SD_BUS_WIDTH_1;
136 case MMC_BUS_WIDTH_4:
137 cmd.arg = SD_BUS_WIDTH_4;
143 err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
150 int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
152 struct mmc_command cmd;
157 memset(&cmd, 0, sizeof(struct mmc_command));
159 cmd.opcode = SD_APP_OP_COND;
160 if (mmc_host_is_spi(host))
161 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
164 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
166 for (i = 100; i; i--) {
167 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
171 /* if we're just probing, do a single pass */
175 /* otherwise wait until reset completes */
176 if (mmc_host_is_spi(host)) {
177 if (!(cmd.resp[0] & R1_SPI_IDLE))
180 if (cmd.resp[0] & MMC_CARD_BUSY)
189 if (rocr && !mmc_host_is_spi(host))
195 int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
197 struct mmc_command cmd;
199 static const u8 test_pattern = 0xAA;
203 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
204 * before SD_APP_OP_COND. This command will harmlessly fail for
207 cmd.opcode = SD_SEND_IF_COND;
208 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
209 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
211 err = mmc_wait_for_cmd(host, &cmd, 0);
215 if (mmc_host_is_spi(host))
216 result_pattern = cmd.resp[1] & 0xFF;
218 result_pattern = cmd.resp[0] & 0xFF;
220 if (result_pattern != test_pattern)
226 int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
229 struct mmc_command cmd;
234 memset(&cmd, 0, sizeof(struct mmc_command));
236 cmd.opcode = SD_SEND_RELATIVE_ADDR;
238 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
240 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
244 *rca = cmd.resp[0] >> 16;
249 int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
252 struct mmc_request mrq;
253 struct mmc_command cmd;
254 struct mmc_data data;
255 struct scatterlist sg;
261 /* NOTE: caller guarantees scr is heap-allocated */
263 err = mmc_app_cmd(card->host, card);
267 memset(&mrq, 0, sizeof(struct mmc_request));
268 memset(&cmd, 0, sizeof(struct mmc_command));
269 memset(&data, 0, sizeof(struct mmc_data));
274 cmd.opcode = SD_APP_SEND_SCR;
276 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
280 data.flags = MMC_DATA_READ;
284 sg_init_one(&sg, scr, 8);
286 mmc_set_data_timeout(&data, card);
288 mmc_wait_for_req(card->host, &mrq);
295 scr[0] = be32_to_cpu(scr[0]);
296 scr[1] = be32_to_cpu(scr[1]);
301 int mmc_sd_switch(struct mmc_card *card, int mode, int group,
304 struct mmc_request mrq;
305 struct mmc_command cmd;
306 struct mmc_data data;
307 struct scatterlist sg;
312 /* NOTE: caller guarantees resp is heap-allocated */
317 memset(&mrq, 0, sizeof(struct mmc_request));
318 memset(&cmd, 0, sizeof(struct mmc_command));
319 memset(&data, 0, sizeof(struct mmc_data));
324 cmd.opcode = SD_SWITCH;
325 cmd.arg = mode << 31 | 0x00FFFFFF;
326 cmd.arg &= ~(0xF << (group * 4));
327 cmd.arg |= value << (group * 4);
328 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
332 data.flags = MMC_DATA_READ;
336 sg_init_one(&sg, resp, 64);
338 mmc_set_data_timeout(&data, card);
340 mmc_wait_for_req(card->host, &mrq);
350 int mmc_app_sd_status(struct mmc_card *card, void *ssr)
353 struct mmc_request mrq;
354 struct mmc_command cmd;
355 struct mmc_data data;
356 struct scatterlist sg;
362 /* NOTE: caller guarantees ssr is heap-allocated */
364 err = mmc_app_cmd(card->host, card);
368 memset(&mrq, 0, sizeof(struct mmc_request));
369 memset(&cmd, 0, sizeof(struct mmc_command));
370 memset(&data, 0, sizeof(struct mmc_data));
375 cmd.opcode = SD_APP_SD_STATUS;
377 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
381 data.flags = MMC_DATA_READ;
385 sg_init_one(&sg, ssr, 64);
387 mmc_set_data_timeout(&data, card);
389 mmc_wait_for_req(card->host, &mrq);