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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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b855885e3b
The classic MMC bus was defined as multi card bus system, which is reflected in the design in the MMC layer. When SD showed up, the bus topology was abandoned and a star topology (one card per host) was mandated. MMC version 4 has followed this, officially deprecating the bus topology. As we do not have any known users of the bus topology we can remove support for it. This will simplify the code and rectify some incorrect assumptions in the newer additions. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
176 lines
5.5 KiB
C
176 lines
5.5 KiB
C
/*
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* linux/include/linux/mmc/host.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Host driver specific definitions.
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*/
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#ifndef LINUX_MMC_HOST_H
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#define LINUX_MMC_HOST_H
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#include <linux/mmc/mmc.h>
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struct mmc_ios {
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unsigned int clock; /* clock rate */
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unsigned short vdd;
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#define MMC_VDD_150 0
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#define MMC_VDD_155 1
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#define MMC_VDD_160 2
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#define MMC_VDD_165 3
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#define MMC_VDD_170 4
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#define MMC_VDD_180 5
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#define MMC_VDD_190 6
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#define MMC_VDD_200 7
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#define MMC_VDD_210 8
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#define MMC_VDD_220 9
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#define MMC_VDD_230 10
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#define MMC_VDD_240 11
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#define MMC_VDD_250 12
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#define MMC_VDD_260 13
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#define MMC_VDD_270 14
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#define MMC_VDD_280 15
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#define MMC_VDD_290 16
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#define MMC_VDD_300 17
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#define MMC_VDD_310 18
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#define MMC_VDD_320 19
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#define MMC_VDD_330 20
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#define MMC_VDD_340 21
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#define MMC_VDD_350 22
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#define MMC_VDD_360 23
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unsigned char bus_mode; /* command output mode */
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#define MMC_BUSMODE_OPENDRAIN 1
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#define MMC_BUSMODE_PUSHPULL 2
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unsigned char chip_select; /* SPI chip select */
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#define MMC_CS_DONTCARE 0
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#define MMC_CS_HIGH 1
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#define MMC_CS_LOW 2
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unsigned char power_mode; /* power supply mode */
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#define MMC_POWER_OFF 0
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#define MMC_POWER_UP 1
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#define MMC_POWER_ON 2
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unsigned char bus_width; /* data bus width */
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#define MMC_BUS_WIDTH_1 0
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#define MMC_BUS_WIDTH_4 2
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unsigned char timing; /* timing specification used */
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#define MMC_TIMING_LEGACY 0
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#define MMC_TIMING_MMC_HS 1
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#define MMC_TIMING_SD_HS 2
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};
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struct mmc_host_ops {
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void (*request)(struct mmc_host *host, struct mmc_request *req);
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void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
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int (*get_ro)(struct mmc_host *host);
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};
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struct mmc_card;
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struct device;
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struct mmc_host {
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struct device *parent;
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struct device class_dev;
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int index;
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const struct mmc_host_ops *ops;
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unsigned int f_min;
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unsigned int f_max;
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u32 ocr_avail;
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#define MMC_VDD_145_150 0x00000001 /* VDD voltage 1.45 - 1.50 */
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#define MMC_VDD_150_155 0x00000002 /* VDD voltage 1.50 - 1.55 */
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#define MMC_VDD_155_160 0x00000004 /* VDD voltage 1.55 - 1.60 */
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#define MMC_VDD_160_165 0x00000008 /* VDD voltage 1.60 - 1.65 */
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#define MMC_VDD_165_170 0x00000010 /* VDD voltage 1.65 - 1.70 */
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#define MMC_VDD_17_18 0x00000020 /* VDD voltage 1.7 - 1.8 */
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#define MMC_VDD_18_19 0x00000040 /* VDD voltage 1.8 - 1.9 */
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#define MMC_VDD_19_20 0x00000080 /* VDD voltage 1.9 - 2.0 */
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#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
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#define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
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#define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
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#define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
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#define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
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#define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
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#define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
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#define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
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#define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
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#define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
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#define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
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#define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
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#define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
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#define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
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#define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
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#define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
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unsigned long caps; /* Host capabilities */
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#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
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#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
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#define MMC_CAP_BYTEBLOCK (1 << 2) /* Can do non-log2 block sizes */
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#define MMC_CAP_MMC_HIGHSPEED (1 << 3) /* Can do MMC high-speed timing */
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#define MMC_CAP_SD_HIGHSPEED (1 << 4) /* Can do SD high-speed timing */
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/* host specific block data */
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unsigned int max_seg_size; /* see blk_queue_max_segment_size */
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unsigned short max_hw_segs; /* see blk_queue_max_hw_segments */
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unsigned short max_phys_segs; /* see blk_queue_max_phys_segments */
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unsigned short unused;
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unsigned int max_req_size; /* maximum number of bytes in one req */
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unsigned int max_blk_size; /* maximum size of one mmc block */
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unsigned int max_blk_count; /* maximum number of blocks in one req */
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/* private data */
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struct mmc_ios ios; /* current io bus settings */
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u32 ocr; /* the current OCR setting */
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unsigned int mode; /* current card mode of host */
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#define MMC_MODE_MMC 0
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#define MMC_MODE_SD 1
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struct mmc_card *card; /* device attached to this host */
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wait_queue_head_t wq;
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spinlock_t lock; /* claimed lock */
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unsigned int claimed:1; /* host exclusively claimed */
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struct delayed_work detect;
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#ifdef CONFIG_MMC_DEBUG
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unsigned int removed:1; /* host is being removed */
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#endif
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unsigned long private[0] ____cacheline_aligned;
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};
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extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
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extern int mmc_add_host(struct mmc_host *);
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extern void mmc_remove_host(struct mmc_host *);
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extern void mmc_free_host(struct mmc_host *);
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static inline void *mmc_priv(struct mmc_host *host)
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{
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return (void *)host->private;
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}
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#define mmc_dev(x) ((x)->parent)
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#define mmc_classdev(x) (&(x)->class_dev)
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#define mmc_hostname(x) ((x)->class_dev.bus_id)
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extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
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extern int mmc_resume_host(struct mmc_host *);
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extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
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extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
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#endif
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