Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
os
linux
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
13#include <linux/mmc/mmc.h>
14
15struct mmc_ios {
16 unsigned int clock; /* clock rate */
17 unsigned short vdd;
18
19#define MMC_VDD_150 0
20#define MMC_VDD_155 1
21#define MMC_VDD_160 2
22#define MMC_VDD_165 3
23#define MMC_VDD_170 4
24#define MMC_VDD_180 5
25#define MMC_VDD_190 6
26#define MMC_VDD_200 7
27#define MMC_VDD_210 8
28#define MMC_VDD_220 9
29#define MMC_VDD_230 10
30#define MMC_VDD_240 11
31#define MMC_VDD_250 12
32#define MMC_VDD_260 13
33#define MMC_VDD_270 14
34#define MMC_VDD_280 15
35#define MMC_VDD_290 16
36#define MMC_VDD_300 17
37#define MMC_VDD_310 18
38#define MMC_VDD_320 19
39#define MMC_VDD_330 20
40#define MMC_VDD_340 21
41#define MMC_VDD_350 22
42#define MMC_VDD_360 23
43
44 unsigned char bus_mode; /* command output mode */
45
46#define MMC_BUSMODE_OPENDRAIN 1
47#define MMC_BUSMODE_PUSHPULL 2
48
49 unsigned char chip_select; /* SPI chip select */
50
51#define MMC_CS_DONTCARE 0
52#define MMC_CS_HIGH 1
53#define MMC_CS_LOW 2
54
55 unsigned char power_mode; /* power supply mode */
56
57#define MMC_POWER_OFF 0
58#define MMC_POWER_UP 1
59#define MMC_POWER_ON 2
60
61 unsigned char bus_width; /* data bus width */
62
63#define MMC_BUS_WIDTH_1 0
64#define MMC_BUS_WIDTH_4 2
65
66 unsigned char timing; /* timing specification used */
67
68#define MMC_TIMING_LEGACY 0
69#define MMC_TIMING_MMC_HS 1
70#define MMC_TIMING_SD_HS 2
71};
72
73struct mmc_host_ops {
74 void (*request)(struct mmc_host *host, struct mmc_request *req);
75 void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
76 int (*get_ro)(struct mmc_host *host);
77};
78
79struct mmc_card;
80struct device;
81
82struct mmc_host {
83 struct device *parent;
84 struct device class_dev;
85 int index;
86 const struct mmc_host_ops *ops;
87 unsigned int f_min;
88 unsigned int f_max;
89 u32 ocr_avail;
90
91 unsigned long caps; /* Host capabilities */
92
93#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
94#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
95#define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */
96#define MMC_CAP_MMC_HIGHSPEED (1 << 3) /* Can do MMC high-speed timing */
97#define MMC_CAP_SD_HIGHSPEED (1 << 4) /* Can do SD high-speed timing */
98
99 /* host specific block data */
100 unsigned int max_seg_size; /* see blk_queue_max_segment_size */
101 unsigned short max_hw_segs; /* see blk_queue_max_hw_segments */
102 unsigned short max_phys_segs; /* see blk_queue_max_phys_segments */
103 unsigned short unused;
104 unsigned int max_req_size; /* maximum number of bytes in one req */
105 unsigned int max_blk_size; /* maximum size of one mmc block */
106 unsigned int max_blk_count; /* maximum number of blocks in one req */
107
108 /* private data */
109 struct mmc_ios ios; /* current io bus settings */
110 u32 ocr; /* the current OCR setting */
111
112 unsigned int mode; /* current card mode of host */
113#define MMC_MODE_MMC 0
114#define MMC_MODE_SD 1
115
116 struct list_head cards; /* devices attached to this host */
117
118 wait_queue_head_t wq;
119 spinlock_t lock; /* claimed lock */
120 unsigned int claimed:1; /* host exclusively claimed */
121
122 struct mmc_card *card_selected; /* the selected MMC card */
123
124 struct delayed_work detect;
125
126 unsigned long private[0] ____cacheline_aligned;
127};
128
129extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
130extern int mmc_add_host(struct mmc_host *);
131extern void mmc_remove_host(struct mmc_host *);
132extern void mmc_free_host(struct mmc_host *);
133
134static inline void *mmc_priv(struct mmc_host *host)
135{
136 return (void *)host->private;
137}
138
139#define mmc_dev(x) ((x)->parent)
140#define mmc_classdev(x) (&(x)->class_dev)
141#define mmc_hostname(x) ((x)->class_dev.bus_id)
142
143extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
144extern int mmc_resume_host(struct mmc_host *);
145
146extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
147extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
148
149#endif
150