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1da177e4 LT |
1 | /* |
2 | * linux/include/linux/mmc/host.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 | * Host driver specific definitions. | |
9 | */ | |
10 | #ifndef LINUX_MMC_HOST_H | |
11 | #define LINUX_MMC_HOST_H | |
12 | ||
af8350c7 PO |
13 | #include <linux/leds.h> |
14 | ||
aaac1b47 | 15 | #include <linux/mmc/core.h> |
1da177e4 LT |
16 | |
17 | struct mmc_ios { | |
18 | unsigned int clock; /* clock rate */ | |
19 | unsigned short vdd; | |
20 | ||
4be34c99 | 21 | /* vdd stores the bit number of the selected voltage range from below. */ |
1da177e4 LT |
22 | |
23 | unsigned char bus_mode; /* command output mode */ | |
24 | ||
25 | #define MMC_BUSMODE_OPENDRAIN 1 | |
26 | #define MMC_BUSMODE_PUSHPULL 2 | |
27 | ||
865e9f13 PO |
28 | unsigned char chip_select; /* SPI chip select */ |
29 | ||
30 | #define MMC_CS_DONTCARE 0 | |
31 | #define MMC_CS_HIGH 1 | |
32 | #define MMC_CS_LOW 2 | |
33 | ||
1da177e4 LT |
34 | unsigned char power_mode; /* power supply mode */ |
35 | ||
36 | #define MMC_POWER_OFF 0 | |
37 | #define MMC_POWER_UP 1 | |
38 | #define MMC_POWER_ON 2 | |
f218278a PO |
39 | |
40 | unsigned char bus_width; /* data bus width */ | |
41 | ||
42 | #define MMC_BUS_WIDTH_1 0 | |
43 | #define MMC_BUS_WIDTH_4 2 | |
cd9277c0 PO |
44 | |
45 | unsigned char timing; /* timing specification used */ | |
46 | ||
47 | #define MMC_TIMING_LEGACY 0 | |
48 | #define MMC_TIMING_MMC_HS 1 | |
49 | #define MMC_TIMING_SD_HS 2 | |
1da177e4 LT |
50 | }; |
51 | ||
52 | struct mmc_host_ops { | |
53 | void (*request)(struct mmc_host *host, struct mmc_request *req); | |
28f52482 AV |
54 | /* |
55 | * Avoid calling these three functions too often or in a "fast path", | |
56 | * since underlaying controller might implement them in an expensive | |
57 | * and/or slow way. | |
58 | * | |
59 | * Also note that these functions might sleep, so don't call them | |
60 | * in the atomic contexts! | |
08f80bb5 AV |
61 | * |
62 | * Return values for the get_ro callback should be: | |
63 | * 0 for a read/write card | |
64 | * 1 for a read-only card | |
65 | * -ENOSYS when not supported (equal to NULL callback) | |
66 | * or a negative errno value when something bad happened | |
67 | * | |
68 | * Return values for the get_ro callback should be: | |
69 | * 0 for a absent card | |
70 | * 1 for a present card | |
71 | * -ENOSYS when not supported (equal to NULL callback) | |
72 | * or a negative errno value when something bad happened | |
28f52482 | 73 | */ |
1da177e4 | 74 | void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios); |
a00fc090 | 75 | int (*get_ro)(struct mmc_host *host); |
28f52482 AV |
76 | int (*get_cd)(struct mmc_host *host); |
77 | ||
17b759af | 78 | void (*enable_sdio_irq)(struct mmc_host *host, int enable); |
1da177e4 LT |
79 | }; |
80 | ||
81 | struct mmc_card; | |
82 | struct device; | |
83 | ||
84 | struct mmc_host { | |
fcaf71fd GKH |
85 | struct device *parent; |
86 | struct device class_dev; | |
dce77377 | 87 | int index; |
f57b225e | 88 | const struct mmc_host_ops *ops; |
1da177e4 LT |
89 | unsigned int f_min; |
90 | unsigned int f_max; | |
91 | u32 ocr_avail; | |
1da177e4 | 92 | |
55556da0 | 93 | #define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */ |
f74d132c PO |
94 | #define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */ |
95 | #define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */ | |
96 | #define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */ | |
97 | #define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */ | |
98 | #define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */ | |
99 | #define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */ | |
100 | #define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */ | |
101 | #define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */ | |
102 | #define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */ | |
103 | #define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */ | |
104 | #define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */ | |
105 | #define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */ | |
106 | #define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */ | |
107 | #define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */ | |
108 | #define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */ | |
109 | #define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */ | |
110 | ||
f218278a PO |
111 | unsigned long caps; /* Host capabilities */ |
112 | ||
113 | #define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */ | |
23af6039 PO |
114 | #define MMC_CAP_MMC_HIGHSPEED (1 << 1) /* Can do MMC high-speed timing */ |
115 | #define MMC_CAP_SD_HIGHSPEED (1 << 2) /* Can do SD high-speed timing */ | |
116 | #define MMC_CAP_SDIO_IRQ (1 << 3) /* Can signal pending SDIO IRQs */ | |
117 | #define MMC_CAP_SPI (1 << 4) /* Talks only SPI protocols */ | |
118 | #define MMC_CAP_NEEDS_POLL (1 << 5) /* Needs polling for card-detection */ | |
f218278a | 119 | |
1da177e4 LT |
120 | /* host specific block data */ |
121 | unsigned int max_seg_size; /* see blk_queue_max_segment_size */ | |
122 | unsigned short max_hw_segs; /* see blk_queue_max_hw_segments */ | |
123 | unsigned short max_phys_segs; /* see blk_queue_max_phys_segments */ | |
1da177e4 | 124 | unsigned short unused; |
55db890a | 125 | unsigned int max_req_size; /* maximum number of bytes in one req */ |
fe4a3c7a | 126 | unsigned int max_blk_size; /* maximum size of one mmc block */ |
55db890a | 127 | unsigned int max_blk_count; /* maximum number of blocks in one req */ |
1da177e4 LT |
128 | |
129 | /* private data */ | |
7ea239d9 PO |
130 | spinlock_t lock; /* lock for claim and bus ops */ |
131 | ||
1da177e4 LT |
132 | struct mmc_ios ios; /* current io bus settings */ |
133 | u32 ocr; /* the current OCR setting */ | |
134 | ||
97018580 DB |
135 | /* group bitfields together to minimize padding */ |
136 | unsigned int use_spi_crc:1; | |
137 | unsigned int claimed:1; /* host exclusively claimed */ | |
138 | unsigned int bus_dead:1; /* bus has been released */ | |
139 | #ifdef CONFIG_MMC_DEBUG | |
140 | unsigned int removed:1; /* host is being removed */ | |
141 | #endif | |
142 | ||
b855885e | 143 | struct mmc_card *card; /* device attached to this host */ |
1da177e4 LT |
144 | |
145 | wait_queue_head_t wq; | |
f22ee4ed | 146 | |
c4028958 | 147 | struct delayed_work detect; |
01357dca | 148 | |
7ea239d9 PO |
149 | const struct mmc_bus_ops *bus_ops; /* current bus driver */ |
150 | unsigned int bus_refs; /* reference counter */ | |
7ea239d9 | 151 | |
d1496c39 NP |
152 | unsigned int sdio_irqs; |
153 | struct task_struct *sdio_irq_thread; | |
154 | atomic_t sdio_irq_thread_abort; | |
155 | ||
af8350c7 PO |
156 | #ifdef CONFIG_LEDS_TRIGGERS |
157 | struct led_trigger *led; /* activity led */ | |
158 | #endif | |
159 | ||
6edd8ee6 HS |
160 | struct dentry *debugfs_root; |
161 | ||
01357dca | 162 | unsigned long private[0] ____cacheline_aligned; |
1da177e4 LT |
163 | }; |
164 | ||
165 | extern struct mmc_host *mmc_alloc_host(int extra, struct device *); | |
166 | extern int mmc_add_host(struct mmc_host *); | |
167 | extern void mmc_remove_host(struct mmc_host *); | |
168 | extern void mmc_free_host(struct mmc_host *); | |
169 | ||
01357dca RK |
170 | static inline void *mmc_priv(struct mmc_host *host) |
171 | { | |
172 | return (void *)host->private; | |
173 | } | |
174 | ||
97018580 DB |
175 | #define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI) |
176 | ||
fcaf71fd | 177 | #define mmc_dev(x) ((x)->parent) |
11354d03 | 178 | #define mmc_classdev(x) (&(x)->class_dev) |
fcaf71fd | 179 | #define mmc_hostname(x) ((x)->class_dev.bus_id) |
1da177e4 | 180 | |
3bfffd97 | 181 | extern int mmc_suspend_host(struct mmc_host *, pm_message_t); |
1da177e4 LT |
182 | extern int mmc_resume_host(struct mmc_host *); |
183 | ||
8dc00335 | 184 | extern void mmc_detect_change(struct mmc_host *, unsigned long delay); |
1da177e4 LT |
185 | extern void mmc_request_done(struct mmc_host *, struct mmc_request *); |
186 | ||
17b759af NP |
187 | static inline void mmc_signal_sdio_irq(struct mmc_host *host) |
188 | { | |
189 | host->ops->enable_sdio_irq(host, 0); | |
190 | wake_up_process(host->sdio_irq_thread); | |
191 | } | |
192 | ||
1da177e4 LT |
193 | #endif |
194 |