400 lines
14 KiB
C
400 lines
14 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/sched.h>
|
|
|
|
#include <linux/mmc/core.h>
|
|
#include <linux/mmc/pm.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
|
|
#define MMC_TIMING_UHS_SDR12 MMC_TIMING_LEGACY
|
|
#define MMC_TIMING_UHS_SDR25 MMC_TIMING_SD_HS
|
|
#define MMC_TIMING_UHS_SDR50 3
|
|
#define MMC_TIMING_UHS_SDR104 4
|
|
#define MMC_TIMING_UHS_DDR50 5
|
|
|
|
unsigned char ddr; /* dual data rate used */
|
|
|
|
#define MMC_SDR_MODE 0
|
|
#define MMC_1_2V_DDR_MODE 1
|
|
#define MMC_1_8V_DDR_MODE 2
|
|
|
|
unsigned char signal_voltage; /* signalling voltage (1.8V or 3.3V) */
|
|
|
|
#define MMC_SIGNAL_VOLTAGE_330 0
|
|
#define MMC_SIGNAL_VOLTAGE_180 1
|
|
#define MMC_SIGNAL_VOLTAGE_120 2
|
|
|
|
unsigned char drv_type; /* driver type (A, B, C, D) */
|
|
|
|
#define MMC_SET_DRIVER_TYPE_B 0
|
|
#define MMC_SET_DRIVER_TYPE_A 1
|
|
#define MMC_SET_DRIVER_TYPE_C 2
|
|
#define MMC_SET_DRIVER_TYPE_D 3
|
|
};
|
|
|
|
struct mmc_host_ops {
|
|
/*
|
|
* Hosts that support power saving can use the 'enable' and 'disable'
|
|
* methods to exit and enter power saving states. 'enable' is called
|
|
* when the host is claimed and 'disable' is called (or scheduled with
|
|
* a delay) when the host is released. The 'disable' is scheduled if
|
|
* the disable delay set by 'mmc_set_disable_delay()' is non-zero,
|
|
* otherwise 'disable' is called immediately. 'disable' may be
|
|
* scheduled repeatedly, to permit ever greater power saving at the
|
|
* expense of ever greater latency to re-enable. Rescheduling is
|
|
* determined by the return value of the 'disable' method. A positive
|
|
* value gives the delay in milliseconds.
|
|
*
|
|
* In the case where a host function (like set_ios) may be called
|
|
* with or without the host claimed, enabling and disabling can be
|
|
* done directly and will nest correctly. Call 'mmc_host_enable()' and
|
|
* 'mmc_host_lazy_disable()' for this purpose, but note that these
|
|
* functions must be paired.
|
|
*
|
|
* Alternatively, 'mmc_host_enable()' may be paired with
|
|
* 'mmc_host_disable()' which calls 'disable' immediately. In this
|
|
* case the 'disable' method will be called with 'lazy' set to 0.
|
|
* This is mainly useful for error paths.
|
|
*
|
|
* Because lazy disable may be called from a work queue, the 'disable'
|
|
* method must claim the host when 'lazy' != 0, which will work
|
|
* correctly because recursion is detected and handled.
|
|
*/
|
|
int (*enable)(struct mmc_host *host);
|
|
int (*disable)(struct mmc_host *host, int lazy);
|
|
/*
|
|
* It is optional for the host to implement pre_req and post_req in
|
|
* order to support double buffering of requests (prepare one
|
|
* request while another request is active).
|
|
*/
|
|
void (*post_req)(struct mmc_host *host, struct mmc_request *req,
|
|
int err);
|
|
void (*pre_req)(struct mmc_host *host, struct mmc_request *req,
|
|
bool is_first_req);
|
|
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);
|
|
|
|
/* optional callback for HC quirks */
|
|
void (*init_card)(struct mmc_host *host, struct mmc_card *card);
|
|
|
|
int (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
|
|
int (*execute_tuning)(struct mmc_host *host);
|
|
void (*enable_preset_value)(struct mmc_host *host, bool enable);
|
|
int (*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv);
|
|
};
|
|
|
|
struct mmc_card;
|
|
struct device;
|
|
|
|
struct mmc_async_req {
|
|
/* active mmc request */
|
|
struct mmc_request *mrq;
|
|
/*
|
|
* Check error status of completed mmc request.
|
|
* Returns 0 if success otherwise non zero.
|
|
*/
|
|
int (*err_check) (struct mmc_card *, struct mmc_async_req *);
|
|
};
|
|
|
|
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;
|
|
unsigned int f_init;
|
|
u32 ocr_avail;
|
|
u32 ocr_avail_sdio; /* SDIO-specific OCR */
|
|
u32 ocr_avail_sd; /* SD-specific OCR */
|
|
u32 ocr_avail_mmc; /* MMC-specific OCR */
|
|
struct notifier_block pm_notify;
|
|
|
|
#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 */
|
|
#define MMC_CAP_DISABLE (1 << 7) /* Can the host be disabled */
|
|
#define MMC_CAP_NONREMOVABLE (1 << 8) /* Nonremovable e.g. eMMC */
|
|
#define MMC_CAP_WAIT_WHILE_BUSY (1 << 9) /* Waits while card is busy */
|
|
#define MMC_CAP_ERASE (1 << 10) /* Allow erase/trim commands */
|
|
#define MMC_CAP_1_8V_DDR (1 << 11) /* can support */
|
|
/* DDR mode at 1.8V */
|
|
#define MMC_CAP_1_2V_DDR (1 << 12) /* can support */
|
|
/* DDR mode at 1.2V */
|
|
#define MMC_CAP_POWER_OFF_CARD (1 << 13) /* Can power off after boot */
|
|
#define MMC_CAP_BUS_WIDTH_TEST (1 << 14) /* CMD14/CMD19 bus width ok */
|
|
#define MMC_CAP_UHS_SDR12 (1 << 15) /* Host supports UHS SDR12 mode */
|
|
#define MMC_CAP_UHS_SDR25 (1 << 16) /* Host supports UHS SDR25 mode */
|
|
#define MMC_CAP_UHS_SDR50 (1 << 17) /* Host supports UHS SDR50 mode */
|
|
#define MMC_CAP_UHS_SDR104 (1 << 18) /* Host supports UHS SDR104 mode */
|
|
#define MMC_CAP_UHS_DDR50 (1 << 19) /* Host supports UHS DDR50 mode */
|
|
#define MMC_CAP_SET_XPC_330 (1 << 20) /* Host supports >150mA current at 3.3V */
|
|
#define MMC_CAP_SET_XPC_300 (1 << 21) /* Host supports >150mA current at 3.0V */
|
|
#define MMC_CAP_SET_XPC_180 (1 << 22) /* Host supports >150mA current at 1.8V */
|
|
#define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */
|
|
#define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */
|
|
#define MMC_CAP_DRIVER_TYPE_D (1 << 25) /* Host supports Driver Type D */
|
|
#define MMC_CAP_MAX_CURRENT_200 (1 << 26) /* Host max current limit is 200mA */
|
|
#define MMC_CAP_MAX_CURRENT_400 (1 << 27) /* Host max current limit is 400mA */
|
|
#define MMC_CAP_MAX_CURRENT_600 (1 << 28) /* Host max current limit is 600mA */
|
|
#define MMC_CAP_MAX_CURRENT_800 (1 << 29) /* Host max current limit is 800mA */
|
|
#define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */
|
|
|
|
mmc_pm_flag_t pm_caps; /* supported pm features */
|
|
|
|
#ifdef CONFIG_MMC_CLKGATE
|
|
int clk_requests; /* internal reference counter */
|
|
unsigned int clk_delay; /* number of MCI clk hold cycles */
|
|
bool clk_gated; /* clock gated */
|
|
struct work_struct clk_gate_work; /* delayed clock gate */
|
|
unsigned int clk_old; /* old clock value cache */
|
|
spinlock_t clk_lock; /* lock for clk fields */
|
|
struct mutex clk_gate_mutex; /* mutex for clock gating */
|
|
#endif
|
|
|
|
/* host specific block data */
|
|
unsigned int max_seg_size; /* see blk_queue_max_segment_size */
|
|
unsigned short max_segs; /* see blk_queue_max_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 */
|
|
unsigned int max_discard_to; /* max. discard timeout in ms */
|
|
|
|
/* 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
|
|
|
|
/* Only used with MMC_CAP_DISABLE */
|
|
int enabled; /* host is enabled */
|
|
int rescan_disable; /* disable card detection */
|
|
int nesting_cnt; /* "enable" nesting count */
|
|
int en_dis_recurs; /* detect recursion */
|
|
unsigned int disable_delay; /* disable delay in msecs */
|
|
struct delayed_work disable; /* disabling work */
|
|
|
|
struct mmc_card *card; /* device attached to this host */
|
|
|
|
wait_queue_head_t wq;
|
|
struct task_struct *claimer; /* task that has host claimed */
|
|
int claim_cnt; /* "claim" nesting count */
|
|
|
|
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;
|
|
|
|
mmc_pm_flag_t pm_flags; /* requested pm features */
|
|
|
|
#ifdef CONFIG_LEDS_TRIGGERS
|
|
struct led_trigger *led; /* activity led */
|
|
#endif
|
|
|
|
#ifdef CONFIG_REGULATOR
|
|
bool regulator_enabled; /* regulator state */
|
|
#endif
|
|
|
|
struct dentry *debugfs_root;
|
|
|
|
struct mmc_async_req *areq; /* active async req */
|
|
|
|
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 *);
|
|
extern int mmc_resume_host(struct mmc_host *);
|
|
|
|
extern int mmc_power_save_host(struct mmc_host *host);
|
|
extern int mmc_power_restore_host(struct mmc_host *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;
|
|
|
|
#ifdef CONFIG_REGULATOR
|
|
int mmc_regulator_get_ocrmask(struct regulator *supply);
|
|
int mmc_regulator_set_ocr(struct mmc_host *mmc,
|
|
struct regulator *supply,
|
|
unsigned short vdd_bit);
|
|
#else
|
|
static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
|
|
struct regulator *supply,
|
|
unsigned short vdd_bit)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
int mmc_card_awake(struct mmc_host *host);
|
|
int mmc_card_sleep(struct mmc_host *host);
|
|
int mmc_card_can_sleep(struct mmc_host *host);
|
|
|
|
int mmc_host_enable(struct mmc_host *host);
|
|
int mmc_host_disable(struct mmc_host *host);
|
|
int mmc_host_lazy_disable(struct mmc_host *host);
|
|
int mmc_pm_notify(struct notifier_block *notify_block, unsigned long, void *);
|
|
|
|
static inline void mmc_set_disable_delay(struct mmc_host *host,
|
|
unsigned int disable_delay)
|
|
{
|
|
host->disable_delay = disable_delay;
|
|
}
|
|
|
|
/* Module parameter */
|
|
extern int mmc_assume_removable;
|
|
|
|
static inline int mmc_card_is_removable(struct mmc_host *host)
|
|
{
|
|
return !(host->caps & MMC_CAP_NONREMOVABLE) && mmc_assume_removable;
|
|
}
|
|
|
|
static inline int mmc_card_keep_power(struct mmc_host *host)
|
|
{
|
|
return host->pm_flags & MMC_PM_KEEP_POWER;
|
|
}
|
|
|
|
static inline int mmc_card_wake_sdio_irq(struct mmc_host *host)
|
|
{
|
|
return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ;
|
|
}
|
|
|
|
static inline int mmc_host_cmd23(struct mmc_host *host)
|
|
{
|
|
return host->caps & MMC_CAP_CMD23;
|
|
}
|
|
#endif /* LINUX_MMC_HOST_H */
|