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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
mmc/
- drwxr-xr-x
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Viewing file: host.h (13.04 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * 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); 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); };
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; 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 */
/* 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;
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
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