55db890a83
Many controllers have an upper limit on the number of blocks that can be transferred in one request. Allow the host drivers to specify this and make sure we avoid hitting this limit. Also change the max_sectors field to avoid confusion. This makes it map less directly to the block layer limits, but as they didn't apply directly on MMC cards anyway, this isn't a great loss. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
143 lines
3.7 KiB
C
143 lines
3.7 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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};
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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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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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/* 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 list_head cards; /* devices 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 mmc_card *card_selected; /* the selected MMC card */
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struct delayed_work detect;
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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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