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};
27 cmd.opcode = SD_IO_SEND_OP_COND;
29 cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
31 for (i = 100; i; i--) {
32 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
36 /* if we're just probing, do a single pass */
40 /* otherwise wait until reset completes */
41 if (mmc_host_is_spi(host)) {
43 * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
44 * an initialized card under SPI, but some cards
45 * (Marvell's) only behave when looking at this
48 if (cmd.resp[1] & MMC_CARD_BUSY)
51 if (cmd.resp[0] & MMC_CARD_BUSY)
61 *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
66 static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
67 unsigned addr, u8 in, u8 *out)
69 struct mmc_command cmd = {0};
79 cmd.opcode = SD_IO_RW_DIRECT;
80 cmd.arg = write ? 0x80000000 : 0x00000000;
82 cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
85 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
87 err = mmc_wait_for_cmd(host, &cmd, 0);
91 if (mmc_host_is_spi(host)) {
92 /* host driver already reported errors */
94 if (cmd.resp[0] & R5_ERROR)
96 if (cmd.resp[0] & R5_FUNCTION_NUMBER)
98 if (cmd.resp[0] & R5_OUT_OF_RANGE)
103 if (mmc_host_is_spi(host))
104 *out = (cmd.resp[0] >> 8) & 0xFF;
106 *out = cmd.resp[0] & 0xFF;
112 int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
113 unsigned addr, u8 in, u8 *out)
115 return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out);
118 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
119 unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
121 struct mmc_request mrq = {NULL};
122 struct mmc_command cmd = {0};
123 struct mmc_data data = {0};
124 struct scatterlist sg, *sg_ptr;
125 struct sg_table sgtable;
126 unsigned int nents, left_size, i;
127 unsigned int seg_size = card->host->max_seg_size;
138 cmd.opcode = SD_IO_RW_EXTENDED;
139 cmd.arg = write ? 0x80000000 : 0x00000000;
141 cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
142 cmd.arg |= addr << 9;
144 cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */
146 cmd.arg |= 0x08000000 | blocks; /* block mode */
147 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
150 /* Code in host drivers/fwk assumes that "blocks" always is >=1 */
151 data.blocks = blocks ? blocks : 1;
152 data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
154 left_size = data.blksz * data.blocks;
155 nents = (left_size - 1) / seg_size + 1;
157 if (sg_alloc_table(&sgtable, nents, GFP_KERNEL))
160 data.sg = sgtable.sgl;
163 for_each_sg(data.sg, sg_ptr, data.sg_len, i) {
164 sg_set_page(sg_ptr, virt_to_page(buf + (i * seg_size)),
165 min(seg_size, left_size),
166 offset_in_page(buf + (i * seg_size)));
167 left_size = left_size - seg_size;
173 sg_init_one(&sg, buf, left_size);
176 mmc_set_data_timeout(&data, card);
178 mmc_wait_for_req(card->host, &mrq);
181 sg_free_table(&sgtable);
188 if (mmc_host_is_spi(card->host)) {
189 /* host driver already reported errors */
191 if (cmd.resp[0] & R5_ERROR)
193 if (cmd.resp[0] & R5_FUNCTION_NUMBER)
195 if (cmd.resp[0] & R5_OUT_OF_RANGE)
202 int sdio_reset(struct mmc_host *host)
207 /* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */
209 ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort);
215 return mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL);