Linux kernel mirror (for testing)
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1/*
2 * linux/include/linux/mmc/core.h
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8#ifndef LINUX_MMC_CORE_H
9#define LINUX_MMC_CORE_H
10
11#include <linux/interrupt.h>
12#include <linux/completion.h>
13
14struct request;
15struct mmc_data;
16struct mmc_request;
17
18struct mmc_command {
19 u32 opcode;
20 u32 arg;
21#define MMC_CMD23_ARG_REL_WR (1 << 31)
22#define MMC_CMD23_ARG_PACKED ((0 << 31) | (1 << 30))
23#define MMC_CMD23_ARG_TAG_REQ (1 << 29)
24 u32 resp[4];
25 unsigned int flags; /* expected response type */
26#define MMC_RSP_PRESENT (1 << 0)
27#define MMC_RSP_136 (1 << 1) /* 136 bit response */
28#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
29#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
30#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
31
32#define MMC_CMD_MASK (3 << 5) /* non-SPI command type */
33#define MMC_CMD_AC (0 << 5)
34#define MMC_CMD_ADTC (1 << 5)
35#define MMC_CMD_BC (2 << 5)
36#define MMC_CMD_BCR (3 << 5)
37
38#define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */
39#define MMC_RSP_SPI_S2 (1 << 8) /* second byte */
40#define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */
41#define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */
42
43/*
44 * These are the native response types, and correspond to valid bit
45 * patterns of the above flags. One additional valid pattern
46 * is all zeros, which means we don't expect a response.
47 */
48#define MMC_RSP_NONE (0)
49#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
50#define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
51#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
52#define MMC_RSP_R3 (MMC_RSP_PRESENT)
53#define MMC_RSP_R4 (MMC_RSP_PRESENT)
54#define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
55#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
56#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
57
58#define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
59
60/*
61 * These are the SPI response types for MMC, SD, and SDIO cards.
62 * Commands return R1, with maybe more info. Zero is an error type;
63 * callers must always provide the appropriate MMC_RSP_SPI_Rx flags.
64 */
65#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1)
66#define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY)
67#define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
68#define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
69#define MMC_RSP_SPI_R4 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
70#define MMC_RSP_SPI_R5 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
71#define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
72
73#define mmc_spi_resp_type(cmd) ((cmd)->flags & \
74 (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4))
75
76/*
77 * These are the command types.
78 */
79#define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK)
80
81 unsigned int retries; /* max number of retries */
82 unsigned int error; /* command error */
83
84/*
85 * Standard errno values are used for errors, but some have specific
86 * meaning in the MMC layer:
87 *
88 * ETIMEDOUT Card took too long to respond
89 * EILSEQ Basic format problem with the received or sent data
90 * (e.g. CRC check failed, incorrect opcode in response
91 * or bad end bit)
92 * EINVAL Request cannot be performed because of restrictions
93 * in hardware and/or the driver
94 * ENOMEDIUM Host can determine that the slot is empty and is
95 * actively failing requests
96 */
97
98 unsigned int cmd_timeout_ms; /* in milliseconds */
99
100 struct mmc_data *data; /* data segment associated with cmd */
101 struct mmc_request *mrq; /* associated request */
102};
103
104struct mmc_data {
105 unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
106 unsigned int timeout_clks; /* data timeout (in clocks) */
107 unsigned int blksz; /* data block size */
108 unsigned int blocks; /* number of blocks */
109 unsigned int error; /* data error */
110 unsigned int flags;
111
112#define MMC_DATA_WRITE (1 << 8)
113#define MMC_DATA_READ (1 << 9)
114#define MMC_DATA_STREAM (1 << 10)
115
116 unsigned int bytes_xfered;
117
118 struct mmc_command *stop; /* stop command */
119 struct mmc_request *mrq; /* associated request */
120
121 unsigned int sg_len; /* size of scatter list */
122 struct scatterlist *sg; /* I/O scatter list */
123 s32 host_cookie; /* host private data */
124};
125
126struct mmc_host;
127struct mmc_request {
128 struct mmc_command *sbc; /* SET_BLOCK_COUNT for multiblock */
129 struct mmc_command *cmd;
130 struct mmc_data *data;
131 struct mmc_command *stop;
132
133 struct completion completion;
134 void (*done)(struct mmc_request *);/* completion function */
135 struct mmc_host *host;
136};
137
138struct mmc_card;
139struct mmc_async_req;
140
141extern int mmc_stop_bkops(struct mmc_card *);
142extern int mmc_read_bkops_status(struct mmc_card *);
143extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
144 struct mmc_async_req *, int *);
145extern int mmc_interrupt_hpi(struct mmc_card *);
146extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
147extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
148extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
149extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
150 struct mmc_command *, int);
151extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
152extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool);
153extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
154extern int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
155
156#define MMC_ERASE_ARG 0x00000000
157#define MMC_SECURE_ERASE_ARG 0x80000000
158#define MMC_TRIM_ARG 0x00000001
159#define MMC_DISCARD_ARG 0x00000003
160#define MMC_SECURE_TRIM1_ARG 0x80000001
161#define MMC_SECURE_TRIM2_ARG 0x80008000
162
163#define MMC_SECURE_ARGS 0x80000000
164#define MMC_TRIM_ARGS 0x00008001
165
166extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
167 unsigned int arg);
168extern int mmc_can_erase(struct mmc_card *card);
169extern int mmc_can_trim(struct mmc_card *card);
170extern int mmc_can_discard(struct mmc_card *card);
171extern int mmc_can_sanitize(struct mmc_card *card);
172extern int mmc_can_secure_erase_trim(struct mmc_card *card);
173extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
174 unsigned int nr);
175extern unsigned int mmc_calc_max_discard(struct mmc_card *card);
176
177extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
178extern int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
179 bool is_rel_write);
180extern int mmc_hw_reset(struct mmc_host *host);
181extern int mmc_hw_reset_check(struct mmc_host *host);
182extern int mmc_can_reset(struct mmc_card *card);
183
184extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);
185extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int);
186
187extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort);
188extern void mmc_release_host(struct mmc_host *host);
189extern int mmc_try_claim_host(struct mmc_host *host);
190
191extern int mmc_flush_cache(struct mmc_card *);
192
193extern int mmc_detect_card_removed(struct mmc_host *host);
194
195/**
196 * mmc_claim_host - exclusively claim a host
197 * @host: mmc host to claim
198 *
199 * Claim a host for a set of operations.
200 */
201static inline void mmc_claim_host(struct mmc_host *host)
202{
203 __mmc_claim_host(host, NULL);
204}
205
206extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
207
208#endif /* LINUX_MMC_CORE_H */