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 15 struct 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 50 struct 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 56 struct mmc_card; 57 struct device; 58 59 struct 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 }; 129 130 extern struct mmc_host *mmc_alloc_host(int extra, struct device *); 131 extern int mmc_add_host(struct mmc_host *); 132 extern void mmc_remove_host(struct mmc_host *); 133 extern void mmc_free_host(struct mmc_host *); 134 135 static 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) 143 144 extern int mmc_suspend_host(struct mmc_host *, pm_message_t); 145 extern int mmc_resume_host(struct mmc_host *); 146 147 extern void mmc_detect_change(struct mmc_host *, unsigned long delay); 148 extern void mmc_request_done(struct mmc_host *, struct mmc_request *); 149 150 #endif 151 152