This patch adds the handling of the poweroff notify feature during powerdown phase. Signed-off-by: Girish K S <girish.shivananjappa@xxxxxxxxxx> --- drivers/mmc/core/core.c | 29 +++++++++++++++++++++++++++++ drivers/mmc/core/mmc.c | 3 +++ drivers/mmc/host/sdhci.c | 11 +++++++++++ include/linux/mmc/card.h | 29 +++++++++++++++++++++++++---- include/linux/mmc/host.h | 7 +++++-- 5 files changed, 73 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index a65e1ca..37b09d7 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1130,9 +1130,38 @@ static void mmc_power_up(struct mmc_host *host) static void mmc_power_off(struct mmc_host *host) { + struct mmc_card *card = host->card; + unsigned int notify_type; + unsigned int timeout; + int err; + host->ios.clock = 0; host->ios.vdd = 0; + if (mmc_card_mmc(card) && mmc_card_powernotify_on(card)) { + + if (host->power_notify_type == MMC_POWEROFF_NOTIFY_SHORT) { + notify_type = EXT_CSD_POWER_OFF_SHORT; + timeout = card->ext_csd.generic_cmd6_time; + mmc_card_set_powernotify_short(card); + } else { + notify_type = EXT_CSD_POWER_OFF_LONG; + timeout = card->ext_csd.power_off_longtime; + mmc_card_set_powernotify_long(card); + } + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_POWER_OFF_NOTIFICATION, + notify_type, timeout); + + if (err && err != -EBADMSG) + printk(KERN_ERR "Device failed to respond " + "within %d poweroff time." + "forcefully powering down" + "the device\n", timeout); + + mmc_card_set_powernotify_off(card); + } /* * Reset ocr mask to be the highest possible voltage supported for * this mmc host. This value will be used at next power up. diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 2f06b37..b369c6f 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -720,8 +720,11 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, EXT_CSD_POWER_OFF_NOTIFICATION, EXT_CSD_POWER_ON, card->ext_csd.generic_cmd6_time); + if (err && err != -EBADMSG) goto free_card; + + mmc_card_set_powernotify_on(card); } /* diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 0e02cc1..a24a31b 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2566,6 +2566,17 @@ int sdhci_add_host(struct sdhci_host *host) if (caps[1] & SDHCI_DRIVER_TYPE_D) mmc->caps |= MMC_CAP_DRIVER_TYPE_D; + if (mmc->caps == MMC_CAP_POWER_OFF_NOTIFY) { + /* + * If Notify capability is enabled and + * platform data is not initialised, set default to + * long power off notify timeout value + */ + if (mmc->power_notify_type == MMC_POWEROFF_NOTIFY_NONE) + mmc->power_notify_type = MMC_POWEROFF_NOTIFY_LONG; + } else { + mmc->power_notify_type = MMC_POWEROFF_NOTIFY_NONE; + } /* Initial value for re-tuning timer count */ host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> SDHCI_RETUNING_TIMER_COUNT_SHIFT; diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 2bf2843..d40b7b3 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -179,7 +179,12 @@ struct mmc_card { #define MMC_STATE_HIGHSPEED_DDR (1<<4) /* card is in high speed mode */ #define MMC_STATE_ULTRAHIGHSPEED (1<<5) /* card is in ultra high speed mode */ #define MMC_CARD_SDXC (1<<6) /* card is SDXC */ - unsigned int quirks; /* card quirks */ + unsigned int poweroff_notify_state;/*eMMC4.5 notify feature */ +#define MMC_NO_POWER_NITOFICATION 0 +#define MMC_POWERED_ON 1 +#define MMC_POWEROFF_SHORT 2 +#define MMC_POWEROFF_LONG 3 + unsigned int quirks; /* card quirks */ #define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 writes outside of the VS CCCR range */ #define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1) /* use func->cur_blksize */ /* for byte mode */ @@ -192,9 +197,9 @@ struct mmc_card { #define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */ unsigned int erase_size; /* erase size in sectors */ - unsigned int erase_shift; /* if erase unit is power 2 */ - unsigned int pref_erase; /* in sectors */ - u8 erased_byte; /* value of erased bytes */ + unsigned int erase_shift; /* if erase unit is power 2 */ + unsigned int pref_erase; /* in sectors */ + u8 erased_byte; /* value of erased bytes */ u32 raw_cid[4]; /* raw card CID */ u32 raw_csd[4]; /* raw card CSD */ @@ -325,6 +330,22 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data) #define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED) #define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC) +#define mmc_card_powernotify_on(c) \ + ((c)->poweroff_notify_state == MMC_POWERED_ON) +#define mmc_card_powernotify_short(c) \ + ((c)->poweroff_notify_state == MMC_POWEROFF_SHORT) +#define mmc_card_powernotify_long(c) \ + ((c)->poweroff_notify_state == MMC_POWEROFF_LONG) + +#define mmc_card_set_powernotify_off(c) \ + ((c)->poweroff_notify_state = MMC_NO_POWER_NITOFICATION) +#define mmc_card_set_powernotify_on(c) \ + ((c)->poweroff_notify_state = MMC_POWERED_ON) +#define mmc_card_set_powernotify_short(c) \ + ((c)->poweroff_notify_state = MMC_POWEROFF_SHORT) +#define mmc_card_set_powernotify_long(c) \ + ((c)->poweroff_notify_state = MMC_POWEROFF_LONG) + /* * Quirk add/remove for MMC products. */ diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 21c85e1..354752a 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -229,10 +229,13 @@ struct mmc_host { #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_POWER_OFF_NOTIFY (1 << 31)/*NOtify poweroff supported */ +#define MMC_CAP_POWER_OFF_NOTIFY (1 << 31)/*Notify poweroff supported */ mmc_pm_flag_t pm_caps; /* supported pm features */ - +#define MMC_POWEROFF_NOTIFY_NONE 0 +#define MMC_POWEROFF_NOTIFY_SHORT 1 +#define MMC_POWEROFF_NOTIFY_LONG 2 + unsigned int power_notify_type; #ifdef CONFIG_MMC_CLKGATE int clk_requests; /* internal reference counter */ unsigned int clk_delay; /* number of MCI clk hold cycles */ -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html