sdio_ops.c revision 87ae9afdcada236d0a1b38ce2c465a65916961dc 
1/*
2 *  linux/drivers/mmc/sdio_ops.c
3 *
4 *  Copyright 2006-2007 Pierre Ossman
5 *
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.
10 */
11
12#include <linux/scatterlist.h>
13
14#include <linux/mmc/host.h>
15#include <linux/mmc/card.h>
16#include <linux/mmc/mmc.h>
17#include <linux/mmc/sdio.h>
18
19#include "core.h"
20
21int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
22{
23	struct mmc_command cmd;
24	int i, err = 0;
25
26	BUG_ON(!host);
27
28	memset(&cmd, 0, sizeof(struct mmc_command));
29
30	cmd.opcode = SD_IO_SEND_OP_COND;
31	cmd.arg = ocr;
32	cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
33
34	for (i = 100; i; i--) {
35		err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
36		if (err)
37			break;
38
39		/* if we're just probing, do a single pass */
40		if (ocr == 0)
41			break;
42
43		/* otherwise wait until reset completes */
44		if (mmc_host_is_spi(host)) {
45			/*
46			 * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
47			 * an initialized card under SPI, but some cards
48			 * (Marvell's) only behave when looking at this
49			 * one.
50			 */
51			if (cmd.resp[1] & MMC_CARD_BUSY)
52				break;
53		} else {
54			if (cmd.resp[0] & MMC_CARD_BUSY)
55				break;
56		}
57
58		err = -ETIMEDOUT;
59
60		mmc_delay(10);
61	}
62
63	if (rocr)
64		*rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
65
66	return err;
67}
68
69int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
70	unsigned addr, u8 in, u8* out)
71{
72	struct mmc_command cmd;
73	int err;
74
75	BUG_ON(!card);
76	BUG_ON(fn > 7);
77
78	memset(&cmd, 0, sizeof(struct mmc_command));
79
80	cmd.opcode = SD_IO_RW_DIRECT;
81	cmd.arg = write ? 0x80000000 : 0x00000000;
82	cmd.arg |= fn << 28;
83	cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
84	cmd.arg |= addr << 9;
85	cmd.arg |= in;
86	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
87
88	err = mmc_wait_for_cmd(card->host, &cmd, 0);
89	if (err)
90		return err;
91
92	if (mmc_host_is_spi(card->host)) {
93		/* host driver already reported errors */
94	} else {
95		if (cmd.resp[0] & R5_ERROR)
96			return -EIO;
97		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
98			return -EINVAL;
99		if (cmd.resp[0] & R5_OUT_OF_RANGE)
100			return -ERANGE;
101	}
102
103	if (out) {
104		if (mmc_host_is_spi(card->host))
105			*out = (cmd.resp[0] >> 8) & 0xFF;
106		else
107			*out = cmd.resp[0] & 0xFF;
108	}
109
110	return 0;
111}
112
113int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
114	unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
115{
116	struct mmc_request mrq;
117	struct mmc_command cmd;
118	struct mmc_data data;
119	struct scatterlist sg;
120
121	BUG_ON(!card);
122	BUG_ON(fn > 7);
123	BUG_ON(blocks == 1 && blksz > 512);
124	WARN_ON(blocks == 0);
125	WARN_ON(blksz == 0);
126
127	memset(&mrq, 0, sizeof(struct mmc_request));
128	memset(&cmd, 0, sizeof(struct mmc_command));
129	memset(&data, 0, sizeof(struct mmc_data));
130
131	mrq.cmd = &cmd;
132	mrq.data = &data;
133
134	cmd.opcode = SD_IO_RW_EXTENDED;
135	cmd.arg = write ? 0x80000000 : 0x00000000;
136	cmd.arg |= fn << 28;
137	cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
138	cmd.arg |= addr << 9;
139	if (blocks == 1 && blksz <= 512)
140		cmd.arg |= (blksz == 512) ? 0 : blksz;	/* byte mode */
141	else
142		cmd.arg |= 0x08000000 | blocks;		/* block mode */
143	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
144
145	data.blksz = blksz;
146	data.blocks = blocks;
147	data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
148	data.sg = &sg;
149	data.sg_len = 1;
150
151	sg_init_one(&sg, buf, blksz * blocks);
152
153	mmc_set_data_timeout(&data, card);
154
155	mmc_wait_for_req(card->host, &mrq);
156
157	if (cmd.error)
158		return cmd.error;
159	if (data.error)
160		return data.error;
161
162	if (mmc_host_is_spi(card->host)) {
163		/* host driver already reported errors */
164	} else {
165		if (cmd.resp[0] & R5_ERROR)
166			return -EIO;
167		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
168			return -EINVAL;
169		if (cmd.resp[0] & R5_OUT_OF_RANGE)
170			return -ERANGE;
171	}
172
173	return 0;
174}
175
176