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
14 struct request;
15 struct mmc_data;
16 struct mmc_request;
17
18 struct 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 busy_timeout; /* busy detect timeout in ms */
99 /* Set this flag only for blocking sanitize request */
100 bool sanitize_busy;
101
102 struct mmc_data *data; /* data segment associated with cmd */
103 struct mmc_request *mrq; /* associated request */
104 };
105
106 struct mmc_data {
107 unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
108 unsigned int timeout_clks; /* data timeout (in clocks) */
109 unsigned int blksz; /* data block size */
110 unsigned int blocks; /* number of blocks */
111 unsigned int error; /* data error */
112 unsigned int flags;
113
114 #define MMC_DATA_WRITE (1 << 8)
115 #define MMC_DATA_READ (1 << 9)
116 #define MMC_DATA_STREAM (1 << 10)
117
118 unsigned int bytes_xfered;
119
120 struct mmc_command *stop; /* stop command */
121 struct mmc_request *mrq; /* associated request */
122
123 unsigned int sg_len; /* size of scatter list */
124 struct scatterlist *sg; /* I/O scatter list */
125 s32 host_cookie; /* host private data */
126 };
127
128 struct mmc_host;
129 struct mmc_request {
130 struct mmc_command *sbc; /* SET_BLOCK_COUNT for multiblock */
131 struct mmc_command *cmd;
132 struct mmc_data *data;
133 struct mmc_command *stop;
134
135 struct completion completion;
136 void (*done)(struct mmc_request *);/* completion function */
137 struct mmc_host *host;
138 #ifdef CONFIG_BLOCK
139 ktime_t io_start;
140 int lat_hist_enabled;
141 #endif
142 };
143
144 struct mmc_card;
145 struct mmc_async_req;
146
147 extern int mmc_stop_bkops(struct mmc_card *);
148 extern int mmc_read_bkops_status(struct mmc_card *);
149 extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
150 struct mmc_async_req *, int *);
151 extern int mmc_interrupt_hpi(struct mmc_card *);
152 extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
153 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
154 extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
155 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
156 struct mmc_command *, int);
157 extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
158 extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool,
159 bool, bool);
160 extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
161 extern int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
162
163 #define MMC_ERASE_ARG 0x00000000
164 #define MMC_SECURE_ERASE_ARG 0x80000000
165 #define MMC_TRIM_ARG 0x00000001
166 #define MMC_DISCARD_ARG 0x00000003
167 #define MMC_SECURE_TRIM1_ARG 0x80000001
168 #define MMC_SECURE_TRIM2_ARG 0x80008000
169
170 #define MMC_SECURE_ARGS 0x80000000
171 #define MMC_TRIM_ARGS 0x00008001
172
173 extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
174 unsigned int arg);
175 extern int mmc_can_erase(struct mmc_card *card);
176 extern int mmc_can_trim(struct mmc_card *card);
177 extern int mmc_can_discard(struct mmc_card *card);
178 extern int mmc_can_sanitize(struct mmc_card *card);
179 extern int mmc_can_secure_erase_trim(struct mmc_card *card);
180 extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
181 unsigned int nr);
182 extern unsigned int mmc_calc_max_discard(struct mmc_card *card);
183
184 extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
185 extern int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
186 bool is_rel_write);
187 extern int mmc_hw_reset(struct mmc_host *host);
188 extern int mmc_hw_reset_check(struct mmc_host *host);
189 extern int mmc_can_reset(struct mmc_card *card);
190
191 extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);
192 extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int);
193
194 extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort);
195 extern void mmc_release_host(struct mmc_host *host);
196
197 extern void mmc_get_card(struct mmc_card *card);
198 extern void mmc_put_card(struct mmc_card *card);
199
200 extern int mmc_flush_cache(struct mmc_card *);
201
202 extern int mmc_detect_card_removed(struct mmc_host *host);
203
204 /**
205 * mmc_claim_host - exclusively claim a host
206 * @host: mmc host to claim
207 *
208 * Claim a host for a set of operations.
209 */
mmc_claim_host(struct mmc_host * host)210 static inline void mmc_claim_host(struct mmc_host *host)
211 {
212 __mmc_claim_host(host, NULL);
213 }
214
215 struct device_node;
216 extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
217 extern int mmc_of_parse_voltage(struct device_node *np, u32 *mask);
218
219 #endif /* LINUX_MMC_CORE_H */
220