202 lines
6.3 KiB
C
202 lines
6.3 KiB
C
/*
|
|
* linux/include/linux/mmc/host.h
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Host driver specific definitions.
|
|
*/
|
|
#ifndef LINUX_MMC_HOST_H
|
|
#define LINUX_MMC_HOST_H
|
|
|
|
#include <linux/leds.h>
|
|
|
|
#include <linux/mmc/core.h>
|
|
|
|
struct mmc_ios {
|
|
unsigned int clock; /* clock rate */
|
|
unsigned short vdd;
|
|
|
|
/* vdd stores the bit number of the selected voltage range from below. */
|
|
|
|
unsigned char bus_mode; /* command output mode */
|
|
|
|
#define MMC_BUSMODE_OPENDRAIN 1
|
|
#define MMC_BUSMODE_PUSHPULL 2
|
|
|
|
unsigned char chip_select; /* SPI chip select */
|
|
|
|
#define MMC_CS_DONTCARE 0
|
|
#define MMC_CS_HIGH 1
|
|
#define MMC_CS_LOW 2
|
|
|
|
unsigned char power_mode; /* power supply mode */
|
|
|
|
#define MMC_POWER_OFF 0
|
|
#define MMC_POWER_UP 1
|
|
#define MMC_POWER_ON 2
|
|
|
|
unsigned char bus_width; /* data bus width */
|
|
|
|
#define MMC_BUS_WIDTH_1 0
|
|
#define MMC_BUS_WIDTH_4 2
|
|
#define MMC_BUS_WIDTH_8 3
|
|
|
|
unsigned char timing; /* timing specification used */
|
|
|
|
#define MMC_TIMING_LEGACY 0
|
|
#define MMC_TIMING_MMC_HS 1
|
|
#define MMC_TIMING_SD_HS 2
|
|
};
|
|
|
|
struct mmc_host_ops {
|
|
void (*request)(struct mmc_host *host, struct mmc_request *req);
|
|
/*
|
|
* Avoid calling these three functions too often or in a "fast path",
|
|
* since underlaying controller might implement them in an expensive
|
|
* and/or slow way.
|
|
*
|
|
* Also note that these functions might sleep, so don't call them
|
|
* in the atomic contexts!
|
|
*
|
|
* Return values for the get_ro callback should be:
|
|
* 0 for a read/write card
|
|
* 1 for a read-only card
|
|
* -ENOSYS when not supported (equal to NULL callback)
|
|
* or a negative errno value when something bad happened
|
|
*
|
|
* Return values for the get_cd callback should be:
|
|
* 0 for a absent card
|
|
* 1 for a present card
|
|
* -ENOSYS when not supported (equal to NULL callback)
|
|
* or a negative errno value when something bad happened
|
|
*/
|
|
void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
|
|
int (*get_ro)(struct mmc_host *host);
|
|
int (*get_cd)(struct mmc_host *host);
|
|
|
|
void (*enable_sdio_irq)(struct mmc_host *host, int enable);
|
|
};
|
|
|
|
struct mmc_card;
|
|
struct device;
|
|
|
|
struct mmc_host {
|
|
struct device *parent;
|
|
struct device class_dev;
|
|
int index;
|
|
const struct mmc_host_ops *ops;
|
|
unsigned int f_min;
|
|
unsigned int f_max;
|
|
u32 ocr_avail;
|
|
|
|
#define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
|
|
#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
|
|
#define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
|
|
#define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
|
|
#define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
|
|
#define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
|
|
#define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
|
|
#define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
|
|
#define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
|
|
#define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
|
|
#define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
|
|
#define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
|
|
#define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
|
|
#define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
|
|
#define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
|
|
#define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
|
|
#define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
|
|
|
|
unsigned long caps; /* Host capabilities */
|
|
|
|
#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
|
|
#define MMC_CAP_MMC_HIGHSPEED (1 << 1) /* Can do MMC high-speed timing */
|
|
#define MMC_CAP_SD_HIGHSPEED (1 << 2) /* Can do SD high-speed timing */
|
|
#define MMC_CAP_SDIO_IRQ (1 << 3) /* Can signal pending SDIO IRQs */
|
|
#define MMC_CAP_SPI (1 << 4) /* Talks only SPI protocols */
|
|
#define MMC_CAP_NEEDS_POLL (1 << 5) /* Needs polling for card-detection */
|
|
#define MMC_CAP_8_BIT_DATA (1 << 6) /* Can the host do 8 bit transfers */
|
|
|
|
/* host specific block data */
|
|
unsigned int max_seg_size; /* see blk_queue_max_segment_size */
|
|
unsigned short max_hw_segs; /* see blk_queue_max_hw_segments */
|
|
unsigned short max_phys_segs; /* see blk_queue_max_phys_segments */
|
|
unsigned short unused;
|
|
unsigned int max_req_size; /* maximum number of bytes in one req */
|
|
unsigned int max_blk_size; /* maximum size of one mmc block */
|
|
unsigned int max_blk_count; /* maximum number of blocks in one req */
|
|
|
|
/* private data */
|
|
spinlock_t lock; /* lock for claim and bus ops */
|
|
|
|
struct mmc_ios ios; /* current io bus settings */
|
|
u32 ocr; /* the current OCR setting */
|
|
|
|
/* group bitfields together to minimize padding */
|
|
unsigned int use_spi_crc:1;
|
|
unsigned int claimed:1; /* host exclusively claimed */
|
|
unsigned int bus_dead:1; /* bus has been released */
|
|
#ifdef CONFIG_MMC_DEBUG
|
|
unsigned int removed:1; /* host is being removed */
|
|
#endif
|
|
|
|
struct mmc_card *card; /* device attached to this host */
|
|
|
|
wait_queue_head_t wq;
|
|
|
|
struct delayed_work detect;
|
|
|
|
const struct mmc_bus_ops *bus_ops; /* current bus driver */
|
|
unsigned int bus_refs; /* reference counter */
|
|
|
|
unsigned int sdio_irqs;
|
|
struct task_struct *sdio_irq_thread;
|
|
atomic_t sdio_irq_thread_abort;
|
|
|
|
#ifdef CONFIG_LEDS_TRIGGERS
|
|
struct led_trigger *led; /* activity led */
|
|
#endif
|
|
|
|
struct dentry *debugfs_root;
|
|
|
|
unsigned long private[0] ____cacheline_aligned;
|
|
};
|
|
|
|
extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
|
|
extern int mmc_add_host(struct mmc_host *);
|
|
extern void mmc_remove_host(struct mmc_host *);
|
|
extern void mmc_free_host(struct mmc_host *);
|
|
|
|
static inline void *mmc_priv(struct mmc_host *host)
|
|
{
|
|
return (void *)host->private;
|
|
}
|
|
|
|
#define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI)
|
|
|
|
#define mmc_dev(x) ((x)->parent)
|
|
#define mmc_classdev(x) (&(x)->class_dev)
|
|
#define mmc_hostname(x) (dev_name(&(x)->class_dev))
|
|
|
|
extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
|
|
extern int mmc_resume_host(struct mmc_host *);
|
|
|
|
extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
|
|
extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
|
|
|
|
static inline void mmc_signal_sdio_irq(struct mmc_host *host)
|
|
{
|
|
host->ops->enable_sdio_irq(host, 0);
|
|
wake_up_process(host->sdio_irq_thread);
|
|
}
|
|
|
|
struct regulator;
|
|
|
|
int mmc_regulator_get_ocrmask(struct regulator *supply);
|
|
int mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit);
|
|
|
|
#endif
|
|
|