Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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/core.h>
14
15struct mmc_ios {
16 unsigned int clock; /* clock rate */
17 unsigned short vdd;
18
19/* vdd stores the bit number of the selected voltage range from below. */
20
21 unsigned char bus_mode; /* command output mode */
22
23#define MMC_BUSMODE_OPENDRAIN 1
24#define MMC_BUSMODE_PUSHPULL 2
25
26 unsigned char chip_select; /* SPI chip select */
27
28#define MMC_CS_DONTCARE 0
29#define MMC_CS_HIGH 1
30#define MMC_CS_LOW 2
31
32 unsigned char power_mode; /* power supply mode */
33
34#define MMC_POWER_OFF 0
35#define MMC_POWER_UP 1
36#define MMC_POWER_ON 2
37
38 unsigned char bus_width; /* data bus width */
39
40#define MMC_BUS_WIDTH_1 0
41#define MMC_BUS_WIDTH_4 2
42
43 unsigned char timing; /* timing specification used */
44
45#define MMC_TIMING_LEGACY 0
46#define MMC_TIMING_MMC_HS 1
47#define MMC_TIMING_SD_HS 2
48};
49
50struct mmc_host_ops {
51 void (*request)(struct mmc_host *host, struct mmc_request *req);
52 void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
53 int (*get_ro)(struct mmc_host *host);
54};
55
56struct mmc_card;
57struct device;
58
59struct mmc_host {
60 struct device *parent;
61 struct device class_dev;
62 int index;
63 const struct mmc_host_ops *ops;
64 unsigned int f_min;
65 unsigned int f_max;
66 u32 ocr_avail;
67
68#define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
69#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
70#define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
71#define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
72#define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
73#define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
74#define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
75#define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
76#define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
77#define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
78#define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
79#define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
80#define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
81#define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
82#define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
83#define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
84#define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
85
86 unsigned long caps; /* Host capabilities */
87
88#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
89#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
90#define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */
91#define MMC_CAP_MMC_HIGHSPEED (1 << 3) /* Can do MMC high-speed timing */
92#define MMC_CAP_SD_HIGHSPEED (1 << 4) /* Can do SD high-speed timing */
93
94 /* host specific block data */
95 unsigned int max_seg_size; /* see blk_queue_max_segment_size */
96 unsigned short max_hw_segs; /* see blk_queue_max_hw_segments */
97 unsigned short max_phys_segs; /* see blk_queue_max_phys_segments */
98 unsigned short unused;
99 unsigned int max_req_size; /* maximum number of bytes in one req */
100 unsigned int max_blk_size; /* maximum size of one mmc block */
101 unsigned int max_blk_count; /* maximum number of blocks in one req */
102
103 /* private data */
104 spinlock_t lock; /* lock for claim and bus ops */
105
106 struct mmc_ios ios; /* current io bus settings */
107 u32 ocr; /* the current OCR setting */
108
109 unsigned int mode; /* current card mode of host */
110#define MMC_MODE_MMC 0
111#define MMC_MODE_SD 1
112
113 struct mmc_card *card; /* device attached to this host */
114
115 wait_queue_head_t wq;
116 unsigned int claimed:1; /* host exclusively claimed */
117
118 struct delayed_work detect;
119#ifdef CONFIG_MMC_DEBUG
120 unsigned int removed:1; /* host is being removed */
121#endif
122
123 const struct mmc_bus_ops *bus_ops; /* current bus driver */
124 unsigned int bus_refs; /* reference counter */
125 unsigned int bus_dead:1; /* bus has been released */
126
127 unsigned long private[0] ____cacheline_aligned;
128};
129
130extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
131extern int mmc_add_host(struct mmc_host *);
132extern void mmc_remove_host(struct mmc_host *);
133extern void mmc_free_host(struct mmc_host *);
134
135static inline void *mmc_priv(struct mmc_host *host)
136{
137 return (void *)host->private;
138}
139
140#define mmc_dev(x) ((x)->parent)
141#define mmc_classdev(x) (&(x)->class_dev)
142#define mmc_hostname(x) ((x)->class_dev.bus_id)
143
144extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
145extern int mmc_resume_host(struct mmc_host *);
146
147extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
148extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
149
150#endif
151