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/leds.h>
14
15 #include <linux/mmc/core.h>
16
17 struct mmc_ios {
18 unsigned int clock; /* clock rate */
19 unsigned short vdd;
20
21 /* vdd stores the bit number of the selected voltage range from below. */
22
23 unsigned char bus_mode; /* command output mode */
24
25 #define MMC_BUSMODE_OPENDRAIN 1
26 #define MMC_BUSMODE_PUSHPULL 2
27
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
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
39
40 unsigned char bus_width; /* data bus width */
41
42 #define MMC_BUS_WIDTH_1 0
43 #define MMC_BUS_WIDTH_4 2
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
50 };
51
52 struct mmc_host_ops {
53 void (*request)(struct mmc_host *host, struct mmc_request *req);
54 void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
55 int (*get_ro)(struct mmc_host *host);
56 void (*enable_sdio_irq)(struct mmc_host *host, int enable);
57 };
58
59 struct mmc_card;
60 struct device;
61
62 struct mmc_host {
63 struct device *parent;
64 struct device class_dev;
65 int index;
66 const struct mmc_host_ops *ops;
67 unsigned int f_min;
68 unsigned int f_max;
69 u32 ocr_avail;
70
71 #define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
72 #define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
73 #define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
74 #define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
75 #define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
76 #define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
77 #define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
78 #define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
79 #define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
80 #define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
81 #define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
82 #define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
83 #define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
84 #define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
85 #define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
86 #define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
87 #define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
88
89 unsigned long caps; /* Host capabilities */
90
91 #define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
92 #define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
93 #define MMC_CAP_MMC_HIGHSPEED (1 << 2) /* Can do MMC high-speed timing */
94 #define MMC_CAP_SD_HIGHSPEED (1 << 3) /* Can do SD high-speed timing */
95 #define MMC_CAP_SDIO_IRQ (1 << 4) /* Can signal pending SDIO IRQs */
96 #define MMC_CAP_SPI (1 << 5) /* Talks only SPI protocols */
97
98 /* host specific block data */
99 unsigned int max_seg_size; /* see blk_queue_max_segment_size */
100 unsigned short max_hw_segs; /* see blk_queue_max_hw_segments */
101 unsigned short max_phys_segs; /* see blk_queue_max_phys_segments */
102 unsigned short unused;
103 unsigned int max_req_size; /* maximum number of bytes in one req */
104 unsigned int max_blk_size; /* maximum size of one mmc block */
105 unsigned int max_blk_count; /* maximum number of blocks in one req */
106
107 /* private data */
108 spinlock_t lock; /* lock for claim and bus ops */
109
110 struct mmc_ios ios; /* current io bus settings */
111 u32 ocr; /* the current OCR setting */
112
113 /* group bitfields together to minimize padding */
114 unsigned int use_spi_crc:1;
115 unsigned int claimed:1; /* host exclusively claimed */
116 unsigned int bus_dead:1; /* bus has been released */
117 #ifdef CONFIG_MMC_DEBUG
118 unsigned int removed:1; /* host is being removed */
119 #endif
120
121 struct mmc_card *card; /* device attached to this host */
122
123 wait_queue_head_t wq;
124
125 struct delayed_work detect;
126
127 const struct mmc_bus_ops *bus_ops; /* current bus driver */
128 unsigned int bus_refs; /* reference counter */
129
130 unsigned int sdio_irqs;
131 struct task_struct *sdio_irq_thread;
132 atomic_t sdio_irq_thread_abort;
133
134 #ifdef CONFIG_LEDS_TRIGGERS
135 struct led_trigger *led; /* activity led */
136 #endif
137
138 unsigned long private[0] ____cacheline_aligned;
139 };
140
141 extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
142 extern int mmc_add_host(struct mmc_host *);
143 extern void mmc_remove_host(struct mmc_host *);
144 extern void mmc_free_host(struct mmc_host *);
145
146 static inline void *mmc_priv(struct mmc_host *host)
147 {
148 return (void *)host->private;
149 }
150
151 #define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI)
152
153 #define mmc_dev(x) ((x)->parent)
154 #define mmc_classdev(x) (&(x)->class_dev)
155 #define mmc_hostname(x) ((x)->class_dev.bus_id)
156
157 extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
158 extern int mmc_resume_host(struct mmc_host *);
159
160 extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
161 extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
162
163 static inline void mmc_signal_sdio_irq(struct mmc_host *host)
164 {
165 host->ops->enable_sdio_irq(host, 0);
166 wake_up_process(host->sdio_irq_thread);
167 }
168
169 #endif
170
171
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