| /* |
| * 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/device.h> |
| #include <linux/fault-inject.h> |
| #include <linux/wakelock.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 |
| #define MMC_TIMING_MMC_HS200 6 |
| |
| 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 |
| #define MMC_1_2V_SDR_MODE 3 |
| #define MMC_1_8V_SDR_MODE 4 |
| |
| 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 { |
| /* |
| * 'enable' is called when the host is claimed and 'disable' is called |
| * when the host is released. 'enable' and 'disable' are deprecated. |
| */ |
| int (*enable)(struct mmc_host *host); |
| int (*disable)(struct mmc_host *host); |
| /* |
| * 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). |
| * pre_req() must always be followed by a post_req(). |
| * To undo a call made to pre_req(), call post_req() with |
| * a nonzero err condition. |
| */ |
| 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); |
| |
| /* The tuning command opcode value is different for SD and eMMC cards */ |
| int (*execute_tuning)(struct mmc_host *host, u32 opcode); |
| void (*enable_preset_value)(struct mmc_host *host, bool enable); |
| int (*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv); |
| void (*hw_reset)(struct mmc_host *host); |
| }; |
| |
| 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_hotplug { |
| unsigned int irq; |
| void *handler_priv; |
| }; |
| |
| 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_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. */ |
| #define MMC_CAP_HW_RESET (1 << 31) /* Hardware reset */ |
| |
| unsigned int caps2; /* More host capabilities */ |
| |
| #define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */ |
| #define MMC_CAP2_CACHE_CTRL (1 << 1) /* Allow cache control */ |
| #define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported */ |
| #define MMC_CAP2_NO_MULTI_READ (1 << 3) /* Multiblock reads don't work */ |
| #define MMC_CAP2_NO_SLEEP_CMD (1 << 4) /* Don't allow sleep command */ |
| #define MMC_CAP2_HS200_1_8V_SDR (1 << 5) /* can support */ |
| #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */ |
| #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \ |
| MMC_CAP2_HS200_1_2V_SDR) |
| #define MMC_CAP2_BROKEN_VOLTAGE (1 << 7) /* Use the broken voltage */ |
| #define MMC_CAP2_DETECT_ON_ERR (1 << 8) /* On I/O err check card removal */ |
| #define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size */ |
| |
| #define MMC_CAP2_PACKED_RD (1 << 10) /* Allow packed read */ |
| #define MMC_CAP2_PACKED_WR (1 << 11) /* Allow packed write */ |
| #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \ |
| MMC_CAP2_PACKED_WR) /* Allow packed commands */ |
| #define MMC_CAP2_PACKED_WR_CONTROL (1 << 12) /* Allow write packing control */ |
| |
| #define MMC_CAP2_SANITIZE (1 << 13) /* Support Sanitize */ |
| #define MMC_CAP2_INIT_BKOPS (1 << 15) /* Need to set BKOPS_EN */ |
| mmc_pm_flag_t pm_caps; /* supported pm features */ |
| |
| int clk_requests; /* internal reference counter */ |
| unsigned int clk_delay; /* number of MCI clk hold cycles */ |
| bool clk_gated; /* clock gated */ |
| struct delayed_work 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 */ |
| struct device_attribute clkgate_delay_attr; |
| unsigned long clkgate_delay; |
| |
| /* 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 |
| |
| int rescan_disable; /* disable card detection */ |
| |
| struct mmc_card *card; /* device attached to this host */ |
| |
| wait_queue_head_t wq; |
| struct task_struct *claimer; /* task that has host claimed */ |
| struct task_struct *suspend_task; |
| int claim_cnt; /* "claim" nesting count */ |
| |
| struct delayed_work detect; |
| struct wake_lock detect_wake_lock; |
| int detect_change; /* card detect flag */ |
| struct mmc_hotplug hotplug; |
| |
| const struct mmc_bus_ops *bus_ops; /* current bus driver */ |
| unsigned int bus_refs; /* reference counter */ |
| |
| unsigned int bus_resume_flags; |
| #define MMC_BUSRESUME_MANUAL_RESUME (1 << 0) |
| #define MMC_BUSRESUME_NEEDS_RESUME (1 << 1) |
| |
| unsigned int sdio_irqs; |
| struct task_struct *sdio_irq_thread; |
| bool sdio_irq_pending; |
| 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 */ |
| |
| #ifdef CONFIG_FAIL_MMC_REQUEST |
| struct fault_attr fail_mmc_request; |
| #endif |
| |
| unsigned int actual_clock; /* Actual HC clock rate */ |
| |
| #ifdef CONFIG_MMC_EMBEDDED_SDIO |
| struct { |
| struct sdio_cis *cis; |
| struct sdio_cccr *cccr; |
| struct sdio_embedded_func *funcs; |
| int num_funcs; |
| } embedded_sdio_data; |
| #endif |
| |
| #ifdef CONFIG_MMC_PERF_PROFILING |
| struct { |
| |
| unsigned long rbytes_drv; /* Rd bytes MMC Host */ |
| unsigned long wbytes_drv; /* Wr bytes MMC Host */ |
| ktime_t rtime_drv; /* Rd time MMC Host */ |
| ktime_t wtime_drv; /* Wr time MMC Host */ |
| ktime_t start; |
| } perf; |
| bool perf_enable; |
| #endif |
| |
| struct mmc_ios saved_ios; |
| 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 *); |
| |
| #ifdef CONFIG_MMC_EMBEDDED_SDIO |
| extern void mmc_set_embedded_sdio_data(struct mmc_host *host, |
| struct sdio_cis *cis, |
| struct sdio_cccr *cccr, |
| struct sdio_embedded_func *funcs, |
| int num_funcs); |
| #endif |
| |
| 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)) |
| #define mmc_bus_needs_resume(host) ((host)->bus_resume_flags & MMC_BUSRESUME_NEEDS_RESUME) |
| #define mmc_bus_manual_resume(host) ((host)->bus_resume_flags & MMC_BUSRESUME_MANUAL_RESUME) |
| |
| static inline void mmc_set_bus_resume_policy(struct mmc_host *host, int manual) |
| { |
| if (manual) |
| host->bus_resume_flags |= MMC_BUSRESUME_MANUAL_RESUME; |
| else |
| host->bus_resume_flags &= ~MMC_BUSRESUME_MANUAL_RESUME; |
| } |
| |
| extern int mmc_resume_bus(struct mmc_host *host); |
| |
| 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 *); |
| |
| extern int mmc_cache_ctrl(struct mmc_host *, u8); |
| |
| static inline void mmc_signal_sdio_irq(struct mmc_host *host) |
| { |
| host->ops->enable_sdio_irq(host, 0); |
| host->sdio_irq_pending = true; |
| 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 *); |
| |
| /* Module parameter */ |
| extern bool 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; |
| } |
| |
| static inline int mmc_boot_partition_access(struct mmc_host *host) |
| { |
| return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC); |
| } |
| |
| static inline int mmc_host_uhs(struct mmc_host *host) |
| { |
| return host->caps & |
| (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | |
| MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | |
| MMC_CAP_UHS_DDR50); |
| } |
| |
| #ifdef CONFIG_MMC_CLKGATE |
| void mmc_host_clk_hold(struct mmc_host *host); |
| void mmc_host_clk_release(struct mmc_host *host); |
| unsigned int mmc_host_clk_rate(struct mmc_host *host); |
| |
| #else |
| static inline void mmc_host_clk_hold(struct mmc_host *host) |
| { |
| } |
| |
| static inline void mmc_host_clk_release(struct mmc_host *host) |
| { |
| } |
| |
| static inline unsigned int mmc_host_clk_rate(struct mmc_host *host) |
| { |
| return host->ios.clock; |
| } |
| #endif |
| #endif /* LINUX_MMC_HOST_H */ |