mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 18:09:57 +00:00
mmc: core: Add Power Off Notify Feature eMMC 4.5
This patch adds support for the power off notify feature, available in eMMC 4.5 devices. If the host has support for this feature, then the mmc core will notify the device by setting the POWER_OFF_NOTIFICATION byte in the extended csd register with a value of 1 (POWER_ON). For suspend mode short timeout is used, whereas for the normal poweroff long timeout is used. Signed-off-by: Girish K S <girish.shivananjappa@linaro.org> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
parent
326adda53a
commit
bec8726abc
6 changed files with 81 additions and 2 deletions
|
@ -1212,11 +1212,43 @@ static void mmc_power_up(struct mmc_host *host)
|
||||||
|
|
||||||
void mmc_power_off(struct mmc_host *host)
|
void mmc_power_off(struct mmc_host *host)
|
||||||
{
|
{
|
||||||
|
struct mmc_card *card;
|
||||||
|
unsigned int notify_type;
|
||||||
|
unsigned int timeout;
|
||||||
|
int err;
|
||||||
|
|
||||||
mmc_host_clk_hold(host);
|
mmc_host_clk_hold(host);
|
||||||
|
|
||||||
|
card = host->card;
|
||||||
host->ios.clock = 0;
|
host->ios.clock = 0;
|
||||||
host->ios.vdd = 0;
|
host->ios.vdd = 0;
|
||||||
|
|
||||||
|
if (card && mmc_card_mmc(card) &&
|
||||||
|
(card->poweroff_notify_state == MMC_POWERED_ON)) {
|
||||||
|
|
||||||
|
if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
|
||||||
|
notify_type = EXT_CSD_POWER_OFF_SHORT;
|
||||||
|
timeout = card->ext_csd.generic_cmd6_time;
|
||||||
|
card->poweroff_notify_state = MMC_POWEROFF_SHORT;
|
||||||
|
} else {
|
||||||
|
notify_type = EXT_CSD_POWER_OFF_LONG;
|
||||||
|
timeout = card->ext_csd.power_off_longtime;
|
||||||
|
card->poweroff_notify_state = MMC_POWEROFF_LONG;
|
||||||
|
}
|
||||||
|
|
||||||
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
||||||
|
EXT_CSD_POWER_OFF_NOTIFICATION,
|
||||||
|
notify_type, timeout);
|
||||||
|
|
||||||
|
if (err && err != -EBADMSG)
|
||||||
|
pr_err("Device failed to respond within %d poweroff "
|
||||||
|
"time. Forcefully powering down the device\n",
|
||||||
|
timeout);
|
||||||
|
|
||||||
|
/* Set the card state to no notification after the poweroff */
|
||||||
|
card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Reset ocr mask to be the highest possible voltage supported for
|
* Reset ocr mask to be the highest possible voltage supported for
|
||||||
* this mmc host. This value will be used at next power up.
|
* this mmc host. This value will be used at next power up.
|
||||||
|
@ -2208,6 +2240,7 @@ int mmc_pm_notify(struct notifier_block *notify_block,
|
||||||
|
|
||||||
spin_lock_irqsave(&host->lock, flags);
|
spin_lock_irqsave(&host->lock, flags);
|
||||||
host->rescan_disable = 1;
|
host->rescan_disable = 1;
|
||||||
|
host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
|
||||||
spin_unlock_irqrestore(&host->lock, flags);
|
spin_unlock_irqrestore(&host->lock, flags);
|
||||||
cancel_delayed_work_sync(&host->detect);
|
cancel_delayed_work_sync(&host->detect);
|
||||||
|
|
||||||
|
@ -2231,6 +2264,7 @@ int mmc_pm_notify(struct notifier_block *notify_block,
|
||||||
|
|
||||||
spin_lock_irqsave(&host->lock, flags);
|
spin_lock_irqsave(&host->lock, flags);
|
||||||
host->rescan_disable = 0;
|
host->rescan_disable = 0;
|
||||||
|
host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG;
|
||||||
spin_unlock_irqrestore(&host->lock, flags);
|
spin_unlock_irqrestore(&host->lock, flags);
|
||||||
mmc_detect_change(host, 0);
|
mmc_detect_change(host, 0);
|
||||||
|
|
||||||
|
|
|
@ -458,10 +458,12 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
||||||
else
|
else
|
||||||
card->erased_byte = 0x0;
|
card->erased_byte = 0x0;
|
||||||
|
|
||||||
if (card->ext_csd.rev >= 6)
|
if (card->ext_csd.rev >= 6) {
|
||||||
card->ext_csd.generic_cmd6_time = 10 *
|
card->ext_csd.generic_cmd6_time = 10 *
|
||||||
ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
|
ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
|
||||||
else
|
card->ext_csd.power_off_longtime = 10 *
|
||||||
|
ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
|
||||||
|
} else
|
||||||
card->ext_csd.generic_cmd6_time = 0;
|
card->ext_csd.generic_cmd6_time = 0;
|
||||||
|
|
||||||
out:
|
out:
|
||||||
|
@ -845,6 +847,23 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
|
||||||
goto free_card;
|
goto free_card;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If the host supports the power_off_notify capability then
|
||||||
|
* set the notification byte in the ext_csd register of device
|
||||||
|
*/
|
||||||
|
if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
|
||||||
|
(card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) {
|
||||||
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
||||||
|
EXT_CSD_POWER_OFF_NOTIFICATION,
|
||||||
|
EXT_CSD_POWER_ON,
|
||||||
|
card->ext_csd.generic_cmd6_time);
|
||||||
|
if (err && err != -EBADMSG)
|
||||||
|
goto free_card;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!err)
|
||||||
|
card->poweroff_notify_state = MMC_POWERED_ON;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Activate high speed (if supported)
|
* Activate high speed (if supported)
|
||||||
*/
|
*/
|
||||||
|
|
|
@ -2739,6 +2739,15 @@ int sdhci_add_host(struct sdhci_host *host)
|
||||||
if (caps[1] & SDHCI_DRIVER_TYPE_D)
|
if (caps[1] & SDHCI_DRIVER_TYPE_D)
|
||||||
mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
|
mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If Power Off Notify capability is enabled by the host,
|
||||||
|
* set notify to short power off notify timeout value.
|
||||||
|
*/
|
||||||
|
if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
|
||||||
|
mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
|
||||||
|
else
|
||||||
|
mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE;
|
||||||
|
|
||||||
/* Initial value for re-tuning timer count */
|
/* Initial value for re-tuning timer count */
|
||||||
host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
|
host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
|
||||||
SDHCI_RETUNING_TIMER_COUNT_SHIFT;
|
SDHCI_RETUNING_TIMER_COUNT_SHIFT;
|
||||||
|
|
|
@ -55,6 +55,7 @@ struct mmc_ext_csd {
|
||||||
unsigned int part_time; /* Units: ms */
|
unsigned int part_time; /* Units: ms */
|
||||||
unsigned int sa_timeout; /* Units: 100ns */
|
unsigned int sa_timeout; /* Units: 100ns */
|
||||||
unsigned int generic_cmd6_time; /* Units: 10ms */
|
unsigned int generic_cmd6_time; /* Units: 10ms */
|
||||||
|
unsigned int power_off_longtime; /* Units: ms */
|
||||||
unsigned int hs_max_dtr;
|
unsigned int hs_max_dtr;
|
||||||
unsigned int sectors;
|
unsigned int sectors;
|
||||||
unsigned int card_type;
|
unsigned int card_type;
|
||||||
|
@ -209,6 +210,11 @@ struct mmc_card {
|
||||||
#define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */
|
#define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */
|
||||||
#define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */
|
#define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */
|
||||||
/* byte mode */
|
/* byte mode */
|
||||||
|
unsigned int poweroff_notify_state; /* eMMC4.5 notify feature */
|
||||||
|
#define MMC_NO_POWER_NOTIFICATION 0
|
||||||
|
#define MMC_POWERED_ON 1
|
||||||
|
#define MMC_POWEROFF_SHORT 2
|
||||||
|
#define MMC_POWEROFF_LONG 3
|
||||||
|
|
||||||
unsigned int erase_size; /* erase size in sectors */
|
unsigned int erase_size; /* erase size in sectors */
|
||||||
unsigned int erase_shift; /* if erase unit is power 2 */
|
unsigned int erase_shift; /* if erase unit is power 2 */
|
||||||
|
|
|
@ -239,8 +239,13 @@ struct mmc_host {
|
||||||
unsigned int caps2; /* More host capabilities */
|
unsigned int caps2; /* More host capabilities */
|
||||||
|
|
||||||
#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
|
#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
|
||||||
|
#define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported */
|
||||||
|
|
||||||
mmc_pm_flag_t pm_caps; /* supported pm features */
|
mmc_pm_flag_t pm_caps; /* supported pm features */
|
||||||
|
unsigned int power_notify_type;
|
||||||
|
#define MMC_HOST_PW_NOTIFY_NONE 0
|
||||||
|
#define MMC_HOST_PW_NOTIFY_SHORT 1
|
||||||
|
#define MMC_HOST_PW_NOTIFY_LONG 2
|
||||||
|
|
||||||
#ifdef CONFIG_MMC_CLKGATE
|
#ifdef CONFIG_MMC_CLKGATE
|
||||||
int clk_requests; /* internal reference counter */
|
int clk_requests; /* internal reference counter */
|
||||||
|
|
|
@ -270,6 +270,7 @@ struct _mmc_csd {
|
||||||
* EXT_CSD fields
|
* EXT_CSD fields
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
#define EXT_CSD_POWER_OFF_NOTIFICATION 34 /* R/W */
|
||||||
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
|
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
|
||||||
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
|
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
|
||||||
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
|
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
|
||||||
|
@ -346,6 +347,11 @@ struct _mmc_csd {
|
||||||
#define EXT_CSD_RST_N_EN_MASK 0x3
|
#define EXT_CSD_RST_N_EN_MASK 0x3
|
||||||
#define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */
|
#define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */
|
||||||
|
|
||||||
|
#define EXT_CSD_NO_POWER_NOTIFICATION 0
|
||||||
|
#define EXT_CSD_POWER_ON 1
|
||||||
|
#define EXT_CSD_POWER_OFF_SHORT 2
|
||||||
|
#define EXT_CSD_POWER_OFF_LONG 3
|
||||||
|
|
||||||
#define EXT_CSD_PWR_CL_8BIT_MASK 0xF0 /* 8 bit PWR CLS */
|
#define EXT_CSD_PWR_CL_8BIT_MASK 0xF0 /* 8 bit PWR CLS */
|
||||||
#define EXT_CSD_PWR_CL_4BIT_MASK 0x0F /* 8 bit PWR CLS */
|
#define EXT_CSD_PWR_CL_4BIT_MASK 0x0F /* 8 bit PWR CLS */
|
||||||
#define EXT_CSD_PWR_CL_8BIT_SHIFT 4
|
#define EXT_CSD_PWR_CL_8BIT_SHIFT 4
|
||||||
|
|
Loading…
Reference in a new issue