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/slab.h>
13 #include <linux/types.h>
14 #include <linux/scatterlist.h>
16 #include <linux/mmc/host.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/mmc.h>
19 #include <linux/mmc/sd.h>
24 static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
27 struct mmc_command cmd;
30 BUG_ON(card && (card->host != host));
32 memset(&cmd, 0, sizeof(struct mmc_command));
34 cmd.opcode = MMC_APP_CMD;
37 cmd.arg = card->rca << 16;
38 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
41 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
44 err = mmc_wait_for_cmd(host, &cmd, 0);
48 /* Check that card supported application commands */
49 if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
56 * mmc_wait_for_app_cmd - start an application command and wait for
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
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
68 int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
69 struct mmc_command *cmd, int retries)
71 struct mmc_request mrq;
81 * We have to resend MMC_APP_CMD for each attempt so
82 * we cannot use the retries field in mmc_command.
84 for (i = 0;i <= retries;i++) {
85 err = mmc_app_cmd(host, card);
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)
95 memset(&mrq, 0, sizeof(struct mmc_request));
97 memset(cmd->resp, 0, sizeof(cmd->resp));
103 mmc_wait_for_req(host, &mrq);
109 /* no point in retrying illegal APP commands */
110 if (mmc_host_is_spi(host)) {
111 if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
119 EXPORT_SYMBOL(mmc_wait_for_app_cmd);
121 int mmc_app_set_bus_width(struct mmc_card *card, int width)
124 struct mmc_command cmd;
129 memset(&cmd, 0, sizeof(struct mmc_command));
131 cmd.opcode = SD_APP_SET_BUS_WIDTH;
132 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
135 case MMC_BUS_WIDTH_1:
136 cmd.arg = SD_BUS_WIDTH_1;
138 case MMC_BUS_WIDTH_4:
139 cmd.arg = SD_BUS_WIDTH_4;
145 err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
152 int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
154 struct mmc_command cmd;
159 memset(&cmd, 0, sizeof(struct mmc_command));
161 cmd.opcode = SD_APP_OP_COND;
162 if (mmc_host_is_spi(host))
163 cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
166 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
168 for (i = 100; i; i--) {
169 err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
173 /* if we're just probing, do a single pass */
177 /* otherwise wait until reset completes */
178 if (mmc_host_is_spi(host)) {
179 if (!(cmd.resp[0] & R1_SPI_IDLE))
182 if (cmd.resp[0] & MMC_CARD_BUSY)
191 if (rocr && !mmc_host_is_spi(host))
197 int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
199 struct mmc_command cmd;
201 static const u8 test_pattern = 0xAA;
204 memset(&cmd, 0, sizeof(struct mmc_command));
207 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
208 * before SD_APP_OP_COND. This command will harmlessly fail for
211 cmd.opcode = SD_SEND_IF_COND;
212 cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
213 cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
215 err = mmc_wait_for_cmd(host, &cmd, 0);
219 if (mmc_host_is_spi(host))
220 result_pattern = cmd.resp[1] & 0xFF;
222 result_pattern = cmd.resp[0] & 0xFF;
224 if (result_pattern != test_pattern)
230 int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
233 struct mmc_command cmd;
238 memset(&cmd, 0, sizeof(struct mmc_command));
240 cmd.opcode = SD_SEND_RELATIVE_ADDR;
242 cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
244 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
248 *rca = cmd.resp[0] >> 16;
253 int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
256 struct mmc_request mrq;
257 struct mmc_command cmd;
258 struct mmc_data data;
259 struct scatterlist sg;
266 /* NOTE: caller guarantees scr is heap-allocated */
268 err = mmc_app_cmd(card->host, card);
272 /* dma onto stack is unsafe/nonportable, but callers to this
273 * routine normally provide temporary on-stack buffers ...
275 data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
276 if (data_buf == NULL)
279 memset(&mrq, 0, sizeof(struct mmc_request));
280 memset(&cmd, 0, sizeof(struct mmc_command));
281 memset(&data, 0, sizeof(struct mmc_data));
286 cmd.opcode = SD_APP_SEND_SCR;
288 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
292 data.flags = MMC_DATA_READ;
296 sg_init_one(&sg, data_buf, 8);
298 mmc_set_data_timeout(&data, card);
300 mmc_wait_for_req(card->host, &mrq);
302 memcpy(scr, data_buf, sizeof(card->raw_scr));
310 scr[0] = be32_to_cpu(scr[0]);
311 scr[1] = be32_to_cpu(scr[1]);
316 int mmc_sd_switch(struct mmc_card *card, int mode, int group,
319 struct mmc_request mrq;
320 struct mmc_command cmd;
321 struct mmc_data data;
322 struct scatterlist sg;
327 /* NOTE: caller guarantees resp is heap-allocated */
332 memset(&mrq, 0, sizeof(struct mmc_request));
333 memset(&cmd, 0, sizeof(struct mmc_command));
334 memset(&data, 0, sizeof(struct mmc_data));
339 cmd.opcode = SD_SWITCH;
340 cmd.arg = mode << 31 | 0x00FFFFFF;
341 cmd.arg &= ~(0xF << (group * 4));
342 cmd.arg |= value << (group * 4);
343 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
347 data.flags = MMC_DATA_READ;
351 sg_init_one(&sg, resp, 64);
353 mmc_set_data_timeout(&data, card);
355 mmc_wait_for_req(card->host, &mrq);
365 int mmc_app_sd_status(struct mmc_card *card, void *ssr)
368 struct mmc_request mrq;
369 struct mmc_command cmd;
370 struct mmc_data data;
371 struct scatterlist sg;
377 /* NOTE: caller guarantees ssr is heap-allocated */
379 err = mmc_app_cmd(card->host, card);
383 memset(&mrq, 0, sizeof(struct mmc_request));
384 memset(&cmd, 0, sizeof(struct mmc_command));
385 memset(&data, 0, sizeof(struct mmc_data));
390 cmd.opcode = SD_APP_SD_STATUS;
392 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
396 data.flags = MMC_DATA_READ;
400 sg_init_one(&sg, ssr, 64);
402 mmc_set_data_timeout(&data, card);
404 mmc_wait_for_req(card->host, &mrq);