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