2 * linux/include/linux/mmc/host.h
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.
8 * Host driver specific definitions.
10 #ifndef LINUX_MMC_HOST_H
11 #define LINUX_MMC_HOST_H
13 #include <linux/mmc/mmc.h>
16 unsigned int clock; /* clock rate */
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
44 unsigned char bus_mode; /* command output mode */
46 #define MMC_BUSMODE_OPENDRAIN 1
47 #define MMC_BUSMODE_PUSHPULL 2
49 unsigned char chip_select; /* SPI chip select */
51 #define MMC_CS_DONTCARE 0
55 unsigned char power_mode; /* power supply mode */
57 #define MMC_POWER_OFF 0
58 #define MMC_POWER_UP 1
59 #define MMC_POWER_ON 2
61 unsigned char bus_width; /* data bus width */
63 #define MMC_BUS_WIDTH_1 0
64 #define MMC_BUS_WIDTH_4 2
66 unsigned char timing; /* timing specification used */
68 #define MMC_TIMING_LEGACY 0
69 #define MMC_TIMING_MMC_HS 1
70 #define MMC_TIMING_SD_HS 2
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);
83 struct device *parent;
84 struct device class_dev;
86 const struct mmc_host_ops *ops;
91 unsigned long caps; /* Host capabilities */
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 */
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 */
109 struct mmc_ios ios; /* current io bus settings */
110 u32 ocr; /* the current OCR setting */
112 unsigned int mode; /* current card mode of host */
113 #define MMC_MODE_MMC 0
114 #define MMC_MODE_SD 1
116 struct list_head cards; /* devices attached to this host */
118 wait_queue_head_t wq;
119 spinlock_t lock; /* claimed lock */
120 unsigned int claimed:1; /* host exclusively claimed */
122 struct mmc_card *card_selected; /* the selected MMC card */
124 struct delayed_work detect;
126 unsigned long private[0] ____cacheline_aligned;
129 extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
130 extern int mmc_add_host(struct mmc_host *);
131 extern void mmc_remove_host(struct mmc_host *);
132 extern void mmc_free_host(struct mmc_host *);
134 static inline void *mmc_priv(struct mmc_host *host)
136 return (void *)host->private;
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)
143 extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
144 extern int mmc_resume_host(struct mmc_host *);
146 extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
147 extern void mmc_request_done(struct mmc_host *, struct mmc_request *);