2 * linux/drivers/mmc/sdio_ops.c
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/scatterlist.h>
14 #include <linux/mmc/host.h>
15 #include <linux/mmc/card.h>
16 #include <linux/mmc/mmc.h>
17 #include <linux/mmc/sdio.h>
22 int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
24 struct mmc_command cmd = {0};
29 cmd.opcode = SD_IO_SEND_OP_COND;
31 cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
33 for (i = 100; i; i--) {
34 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
38 /* if we're just probing, do a single pass */
42 /* otherwise wait until reset completes */
43 if (mmc_host_is_spi(host)) {
45 * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
46 * an initialized card under SPI, but some cards
47 * (Marvell's) only behave when looking at this
50 if (cmd.resp[1] & MMC_CARD_BUSY)
53 if (cmd.resp[0] & MMC_CARD_BUSY)
63 *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
68 static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
69 unsigned addr, u8 in, u8 *out)
71 struct mmc_command cmd = {0};
81 cmd.opcode = SD_IO_RW_DIRECT;
82 cmd.arg = write ? 0x80000000 : 0x00000000;
84 cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
87 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
89 err = mmc_wait_for_cmd(host, &cmd, 0);
93 if (mmc_host_is_spi(host)) {
94 /* host driver already reported errors */
96 if (cmd.resp[0] & R5_ERROR)
98 if (cmd.resp[0] & R5_FUNCTION_NUMBER)
100 if (cmd.resp[0] & R5_OUT_OF_RANGE)
105 if (mmc_host_is_spi(host))
106 *out = (cmd.resp[0] >> 8) & 0xFF;
108 *out = cmd.resp[0] & 0xFF;
114 int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
115 unsigned addr, u8 in, u8 *out)
118 return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out);
121 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
122 unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
124 struct mmc_request mrq = {NULL};
125 struct mmc_command cmd = {0};
126 struct mmc_data data = {0};
127 struct scatterlist sg;
131 BUG_ON(blocks == 1 && blksz > 512);
132 WARN_ON(blocks == 0);
142 cmd.opcode = SD_IO_RW_EXTENDED;
143 cmd.arg = write ? 0x80000000 : 0x00000000;
145 cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
146 cmd.arg |= addr << 9;
147 if (blocks == 1 && blksz < 512)
148 cmd.arg |= blksz; /* byte mode */
149 else if (blocks == 1 && blksz == 512 &&
150 !(mmc_card_broken_byte_mode_512(card)))
151 cmd.arg |= 0; /* byte mode, 0==512 */
153 cmd.arg |= 0x08000000 | blocks; /* block mode */
154 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
157 data.blocks = blocks;
158 data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
162 sg_init_one(&sg, buf, blksz * blocks);
164 mmc_set_data_timeout(&data, card);
166 mmc_wait_for_req(card->host, &mrq);
173 if (mmc_host_is_spi(card->host)) {
174 /* host driver already reported errors */
176 if (cmd.resp[0] & R5_ERROR)
178 if (cmd.resp[0] & R5_FUNCTION_NUMBER)
180 if (cmd.resp[0] & R5_OUT_OF_RANGE)
187 int sdio_reset(struct mmc_host *host)
192 /* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */
194 ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort);
200 ret = mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL);