"raw_rpmb_size_mult" is a mutliple of 128kB block.
RPMB size in byte is calculated by using the following equation:
RPMB partition size = 128kB x raw_rpmb_size_mult
-
-SD/MMC/SDIO Clock Gating Attribute
-==================================
-
-Read and write access is provided to following attribute.
-This attribute appears only if CONFIG_MMC_CLKGATE is enabled.
-
- clkgate_delay Tune the clock gating delay with desired value in milliseconds.
-
-echo <desired delay> > /sys/class/mmc_host/mmcX/clkgate_delay
#
# MMC core configuration
#
-
-config MMC_CLKGATE
- bool "MMC host clock gating"
- help
- This will attempt to aggressively gate the clock to the MMC card.
- This is done to save power due to gating off the logic and bus
- noise when the MMC card is not in use. Your host driver has to
- support handling this in order for it to be of any use.
-
- If unsure, say N.
if (mrq->done)
mrq->done(mrq);
-
- mmc_host_clk_release(host);
}
}
mrq->stop->mrq = mrq;
}
}
- mmc_host_clk_hold(host);
led_trigger_event(host->led, LED_FULL);
__mmc_start_request(host, mrq);
static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq,
bool is_first_req)
{
- if (host->ops->pre_req) {
- mmc_host_clk_hold(host);
+ if (host->ops->pre_req)
host->ops->pre_req(host, mrq, is_first_req);
- mmc_host_clk_release(host);
- }
}
/**
static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
int err)
{
- if (host->ops->post_req) {
- mmc_host_clk_hold(host);
+ if (host->ops->post_req)
host->ops->post_req(host, mrq, err);
- mmc_host_clk_release(host);
- }
}
/**
unsigned int timeout_us, limit_us;
timeout_us = data->timeout_ns / 1000;
- if (mmc_host_clk_rate(card->host))
+ if (card->host->ios.clock)
timeout_us += data->timeout_clks * 1000 /
- (mmc_host_clk_rate(card->host) / 1000);
+ (card->host->ios.clock / 1000);
if (data->flags & MMC_DATA_WRITE)
/*
ios->power_mode, ios->chip_select, ios->vdd,
ios->bus_width, ios->timing);
- if (ios->clock > 0)
- mmc_set_ungated(host);
host->ops->set_ios(host, ios);
}
*/
void mmc_set_chip_select(struct mmc_host *host, int mode)
{
- mmc_host_clk_hold(host);
host->ios.chip_select = mode;
mmc_set_ios(host);
- mmc_host_clk_release(host);
}
/*
* Sets the host clock to the highest possible frequency that
* is below "hz".
*/
-static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
+void mmc_set_clock(struct mmc_host *host, unsigned int hz)
{
WARN_ON(hz && hz < host->f_min);
mmc_set_ios(host);
}
-void mmc_set_clock(struct mmc_host *host, unsigned int hz)
-{
- mmc_host_clk_hold(host);
- __mmc_set_clock(host, hz);
- mmc_host_clk_release(host);
-}
-
-#ifdef CONFIG_MMC_CLKGATE
-/*
- * This gates the clock by setting it to 0 Hz.
- */
-void mmc_gate_clock(struct mmc_host *host)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&host->clk_lock, flags);
- host->clk_old = host->ios.clock;
- host->ios.clock = 0;
- host->clk_gated = true;
- spin_unlock_irqrestore(&host->clk_lock, flags);
- mmc_set_ios(host);
-}
-
-/*
- * This restores the clock from gating by using the cached
- * clock value.
- */
-void mmc_ungate_clock(struct mmc_host *host)
-{
- /*
- * We should previously have gated the clock, so the clock shall
- * be 0 here! The clock may however be 0 during initialization,
- * when some request operations are performed before setting
- * the frequency. When ungate is requested in that situation
- * we just ignore the call.
- */
- if (host->clk_old) {
- BUG_ON(host->ios.clock);
- /* This call will also set host->clk_gated to false */
- __mmc_set_clock(host, host->clk_old);
- }
-}
-
-void mmc_set_ungated(struct mmc_host *host)
-{
- unsigned long flags;
-
- /*
- * We've been given a new frequency while the clock is gated,
- * so make sure we regard this as ungating it.
- */
- spin_lock_irqsave(&host->clk_lock, flags);
- host->clk_gated = false;
- spin_unlock_irqrestore(&host->clk_lock, flags);
-}
-
-#else
-void mmc_set_ungated(struct mmc_host *host)
-{
-}
-#endif
-
int mmc_execute_tuning(struct mmc_card *card)
{
struct mmc_host *host = card->host;
else
opcode = MMC_SEND_TUNING_BLOCK;
- mmc_host_clk_hold(host);
err = host->ops->execute_tuning(host, opcode);
- mmc_host_clk_release(host);
if (err)
pr_err("%s: tuning execution failed\n", mmc_hostname(host));
*/
void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
{
- mmc_host_clk_hold(host);
host->ios.bus_mode = mode;
mmc_set_ios(host);
- mmc_host_clk_release(host);
}
/*
*/
void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
{
- mmc_host_clk_hold(host);
host->ios.bus_width = width;
mmc_set_ios(host);
- mmc_host_clk_release(host);
}
/*
int old_signal_voltage = host->ios.signal_voltage;
host->ios.signal_voltage = signal_voltage;
- if (host->ops->start_signal_voltage_switch) {
- mmc_host_clk_hold(host);
+ if (host->ops->start_signal_voltage_switch)
err = host->ops->start_signal_voltage_switch(host, &host->ios);
- mmc_host_clk_release(host);
- }
if (err)
host->ios.signal_voltage = old_signal_voltage;
pr_warn("%s: cannot verify signal voltage switch\n",
mmc_hostname(host));
- mmc_host_clk_hold(host);
-
cmd.opcode = SD_SWITCH_VOLTAGE;
cmd.arg = 0;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(host, &cmd, 0);
if (err)
- goto err_command;
+ return err;
+
+ if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
+ return -EIO;
- if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) {
- err = -EIO;
- goto err_command;
- }
/*
* The card should drive cmd and dat[0:3] low immediately
* after the response of cmd11, but wait 1 ms to be sure
mmc_power_cycle(host, ocr);
}
-err_command:
- mmc_host_clk_release(host);
-
return err;
}
*/
void mmc_set_timing(struct mmc_host *host, unsigned int timing)
{
- mmc_host_clk_hold(host);
host->ios.timing = timing;
mmc_set_ios(host);
- mmc_host_clk_release(host);
}
/*
*/
void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
{
- mmc_host_clk_hold(host);
host->ios.drv_type = drv_type;
mmc_set_ios(host);
- mmc_host_clk_release(host);
}
int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
{
struct mmc_host *host = card->host;
int host_drv_type = SD_DRIVER_TYPE_B;
- int drive_strength;
*drv_type = 0;
* information and let the hardware specific code
* return what is possible given the options
*/
- mmc_host_clk_hold(host);
- drive_strength = host->ops->select_drive_strength(card, max_dtr,
- host_drv_type,
- card_drv_type,
- drv_type);
- mmc_host_clk_release(host);
-
- return drive_strength;
+ return host->ops->select_drive_strength(card, max_dtr,
+ host_drv_type,
+ card_drv_type,
+ drv_type);
}
/*
if (host->ios.power_mode == MMC_POWER_ON)
return;
- mmc_host_clk_hold(host);
-
mmc_pwrseq_pre_power_on(host);
host->ios.vdd = fls(ocr) - 1;
* time required to reach a stable voltage.
*/
mmc_delay(10);
-
- mmc_host_clk_release(host);
}
void mmc_power_off(struct mmc_host *host)
if (host->ios.power_mode == MMC_POWER_OFF)
return;
- mmc_host_clk_hold(host);
-
mmc_pwrseq_power_off(host);
host->ios.clock = 0;
* can be successfully turned on again.
*/
mmc_delay(1);
-
- mmc_host_clk_release(host);
}
void mmc_power_cycle(struct mmc_host *host, u32 ocr)
*/
timeout_clks <<= 1;
timeout_us += (timeout_clks * 1000) /
- (mmc_host_clk_rate(card->host) / 1000);
+ (card->host->ios.clock / 1000);
erase_timeout = timeout_us / 1000;
{
if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
return;
- mmc_host_clk_hold(host);
host->ops->hw_reset(host);
- mmc_host_clk_release(host);
}
int mmc_hw_reset(struct mmc_host *host)
void mmc_set_chip_select(struct mmc_host *host, int mode);
void mmc_set_clock(struct mmc_host *host, unsigned int hz);
-void mmc_gate_clock(struct mmc_host *host);
-void mmc_ungate_clock(struct mmc_host *host);
-void mmc_set_ungated(struct mmc_host *host);
void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
&mmc_clock_fops))
goto err_node;
-#ifdef CONFIG_MMC_CLKGATE
- if (!debugfs_create_u32("clk_delay", (S_IRUSR | S_IWUSR),
- root, &host->clk_delay))
- goto err_node;
-#endif
#ifdef CONFIG_FAIL_MMC_REQUEST
if (fail_request)
setup_fault_attr(&fail_default_attr, fail_request);
class_unregister(&mmc_host_class);
}
-#ifdef CONFIG_MMC_CLKGATE
-static ssize_t clkgate_delay_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct mmc_host *host = cls_dev_to_mmc_host(dev);
- return snprintf(buf, PAGE_SIZE, "%lu\n", host->clkgate_delay);
-}
-
-static ssize_t clkgate_delay_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
-{
- struct mmc_host *host = cls_dev_to_mmc_host(dev);
- unsigned long flags, value;
-
- if (kstrtoul(buf, 0, &value))
- return -EINVAL;
-
- spin_lock_irqsave(&host->clk_lock, flags);
- host->clkgate_delay = value;
- spin_unlock_irqrestore(&host->clk_lock, flags);
- return count;
-}
-
-/*
- * Enabling clock gating will make the core call out to the host
- * once up and once down when it performs a request or card operation
- * intermingled in any fashion. The driver will see this through
- * set_ios() operations with ios.clock field set to 0 to gate (disable)
- * the block clock, and to the old frequency to enable it again.
- */
-static void mmc_host_clk_gate_delayed(struct mmc_host *host)
-{
- unsigned long tick_ns;
- unsigned long freq = host->ios.clock;
- unsigned long flags;
-
- if (!freq) {
- pr_debug("%s: frequency set to 0 in disable function, "
- "this means the clock is already disabled.\n",
- mmc_hostname(host));
- return;
- }
- /*
- * New requests may have appeared while we were scheduling,
- * then there is no reason to delay the check before
- * clk_disable().
- */
- spin_lock_irqsave(&host->clk_lock, flags);
-
- /*
- * Delay n bus cycles (at least 8 from MMC spec) before attempting
- * to disable the MCI block clock. The reference count may have
- * gone up again after this delay due to rescheduling!
- */
- if (!host->clk_requests) {
- spin_unlock_irqrestore(&host->clk_lock, flags);
- tick_ns = DIV_ROUND_UP(1000000000, freq);
- ndelay(host->clk_delay * tick_ns);
- } else {
- /* New users appeared while waiting for this work */
- spin_unlock_irqrestore(&host->clk_lock, flags);
- return;
- }
- mutex_lock(&host->clk_gate_mutex);
- spin_lock_irqsave(&host->clk_lock, flags);
- if (!host->clk_requests) {
- spin_unlock_irqrestore(&host->clk_lock, flags);
- /* This will set host->ios.clock to 0 */
- mmc_gate_clock(host);
- spin_lock_irqsave(&host->clk_lock, flags);
- pr_debug("%s: gated MCI clock\n", mmc_hostname(host));
- }
- spin_unlock_irqrestore(&host->clk_lock, flags);
- mutex_unlock(&host->clk_gate_mutex);
-}
-
-/*
- * Internal work. Work to disable the clock at some later point.
- */
-static void mmc_host_clk_gate_work(struct work_struct *work)
-{
- struct mmc_host *host = container_of(work, struct mmc_host,
- clk_gate_work.work);
-
- mmc_host_clk_gate_delayed(host);
-}
-
-/**
- * mmc_host_clk_hold - ungate hardware MCI clocks
- * @host: host to ungate.
- *
- * Makes sure the host ios.clock is restored to a non-zero value
- * past this call. Increase clock reference count and ungate clock
- * if we're the first user.
- */
-void mmc_host_clk_hold(struct mmc_host *host)
-{
- unsigned long flags;
-
- /* cancel any clock gating work scheduled by mmc_host_clk_release() */
- cancel_delayed_work_sync(&host->clk_gate_work);
- mutex_lock(&host->clk_gate_mutex);
- spin_lock_irqsave(&host->clk_lock, flags);
- if (host->clk_gated) {
- spin_unlock_irqrestore(&host->clk_lock, flags);
- mmc_ungate_clock(host);
- spin_lock_irqsave(&host->clk_lock, flags);
- pr_debug("%s: ungated MCI clock\n", mmc_hostname(host));
- }
- host->clk_requests++;
- spin_unlock_irqrestore(&host->clk_lock, flags);
- mutex_unlock(&host->clk_gate_mutex);
-}
-
-/**
- * mmc_host_may_gate_card - check if this card may be gated
- * @card: card to check.
- */
-static bool mmc_host_may_gate_card(struct mmc_card *card)
-{
- /* If there is no card we may gate it */
- if (!card)
- return true;
- /*
- * Don't gate SDIO cards! These need to be clocked at all times
- * since they may be independent systems generating interrupts
- * and other events. The clock requests counter from the core will
- * go down to zero since the core does not need it, but we will not
- * gate the clock, because there is somebody out there that may still
- * be using it.
- */
- return !(card->quirks & MMC_QUIRK_BROKEN_CLK_GATING);
-}
-
-/**
- * mmc_host_clk_release - gate off hardware MCI clocks
- * @host: host to gate.
- *
- * Calls the host driver with ios.clock set to zero as often as possible
- * in order to gate off hardware MCI clocks. Decrease clock reference
- * count and schedule disabling of clock.
- */
-void mmc_host_clk_release(struct mmc_host *host)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&host->clk_lock, flags);
- host->clk_requests--;
- if (mmc_host_may_gate_card(host->card) &&
- !host->clk_requests)
- schedule_delayed_work(&host->clk_gate_work,
- msecs_to_jiffies(host->clkgate_delay));
- spin_unlock_irqrestore(&host->clk_lock, flags);
-}
-
-/**
- * mmc_host_clk_rate - get current clock frequency setting
- * @host: host to get the clock frequency for.
- *
- * Returns current clock frequency regardless of gating.
- */
-unsigned int mmc_host_clk_rate(struct mmc_host *host)
-{
- unsigned long freq;
- unsigned long flags;
-
- spin_lock_irqsave(&host->clk_lock, flags);
- if (host->clk_gated)
- freq = host->clk_old;
- else
- freq = host->ios.clock;
- spin_unlock_irqrestore(&host->clk_lock, flags);
- return freq;
-}
-
-/**
- * mmc_host_clk_init - set up clock gating code
- * @host: host with potential clock to control
- */
-static inline void mmc_host_clk_init(struct mmc_host *host)
-{
- host->clk_requests = 0;
- /* Hold MCI clock for 8 cycles by default */
- host->clk_delay = 8;
- /*
- * Default clock gating delay is 0ms to avoid wasting power.
- * This value can be tuned by writing into sysfs entry.
- */
- host->clkgate_delay = 0;
- host->clk_gated = false;
- INIT_DELAYED_WORK(&host->clk_gate_work, mmc_host_clk_gate_work);
- spin_lock_init(&host->clk_lock);
- mutex_init(&host->clk_gate_mutex);
-}
-
-/**
- * mmc_host_clk_exit - shut down clock gating code
- * @host: host with potential clock to control
- */
-static inline void mmc_host_clk_exit(struct mmc_host *host)
-{
- /*
- * Wait for any outstanding gate and then make sure we're
- * ungated before exiting.
- */
- if (cancel_delayed_work_sync(&host->clk_gate_work))
- mmc_host_clk_gate_delayed(host);
- if (host->clk_gated)
- mmc_host_clk_hold(host);
- /* There should be only one user now */
- WARN_ON(host->clk_requests > 1);
-}
-
-static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
-{
- host->clkgate_delay_attr.show = clkgate_delay_show;
- host->clkgate_delay_attr.store = clkgate_delay_store;
- sysfs_attr_init(&host->clkgate_delay_attr.attr);
- host->clkgate_delay_attr.attr.name = "clkgate_delay";
- host->clkgate_delay_attr.attr.mode = S_IRUGO | S_IWUSR;
- if (device_create_file(&host->class_dev, &host->clkgate_delay_attr))
- pr_err("%s: Failed to create clkgate_delay sysfs entry\n",
- mmc_hostname(host));
-}
-#else
-
-static inline void mmc_host_clk_init(struct mmc_host *host)
-{
-}
-
-static inline void mmc_host_clk_exit(struct mmc_host *host)
-{
-}
-
-static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
-{
-}
-
-#endif
-
void mmc_retune_enable(struct mmc_host *host)
{
host->can_retune = 1;
return NULL;
}
- mmc_host_clk_init(host);
-
spin_lock_init(&host->lock);
init_waitqueue_head(&host->wq);
INIT_DELAYED_WORK(&host->detect, mmc_rescan);
#ifdef CONFIG_DEBUG_FS
mmc_add_host_debugfs(host);
#endif
- mmc_host_clk_sysfs_init(host);
mmc_start_host(host);
register_pm_notifier(&host->pm_notify);
device_del(&host->class_dev);
led_trigger_unregister_simple(host->led);
-
- mmc_host_clk_exit(host);
}
EXPORT_SYMBOL(mmc_remove_host);
if (!mmc_can_reset(card))
return -EOPNOTSUPP;
- mmc_host_clk_hold(host);
mmc_set_clock(host, host->f_init);
host->ops->hw_reset(host);
/* Set initial state and call mmc_set_ios */
mmc_set_initial_state(host);
- mmc_host_clk_release(host);
return mmc_init_card(host, card->ocr, card);
}
#define SDIO_DEVICE_ID_MARVELL_8797_F0 0x9128
#endif
-/*
- * This hook just adds a quirk for all sdio devices
- */
-static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
-{
- if (mmc_card_sdio(card))
- card->quirks |= data;
-}
-
static const struct mmc_fixup mmc_fixup_methods[] = {
- /* by default sdio devices are considered CLK_GATING broken */
- /* good cards will be whitelisted as they are tested */
- SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,
- add_quirk_for_sdio_devices,
- MMC_QUIRK_BROKEN_CLK_GATING),
-
- SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
- remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),
-
SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),
if (!host->ops->get_ro)
return -1;
- mmc_host_clk_hold(host);
ro = host->ops->get_ro(host);
- mmc_host_clk_release(host);
return ro;
}
}
if (!err && host->sdio_irqs) {
- if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
+ if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
wake_up_process(host->sdio_irq_thread);
- } else if (host->caps & MMC_CAP_SDIO_IRQ) {
- mmc_host_clk_hold(host);
+ else if (host->caps & MMC_CAP_SDIO_IRQ)
host->ops->enable_sdio_irq(host, 1);
- mmc_host_clk_release(host);
- }
}
mmc_release_host(host);
}
set_current_state(TASK_INTERRUPTIBLE);
- if (host->caps & MMC_CAP_SDIO_IRQ) {
- mmc_host_clk_hold(host);
+ if (host->caps & MMC_CAP_SDIO_IRQ)
host->ops->enable_sdio_irq(host, 1);
- mmc_host_clk_release(host);
- }
if (!kthread_should_stop())
schedule_timeout(period);
set_current_state(TASK_RUNNING);
} while (!kthread_should_stop());
- if (host->caps & MMC_CAP_SDIO_IRQ) {
- mmc_host_clk_hold(host);
+ if (host->caps & MMC_CAP_SDIO_IRQ)
host->ops->enable_sdio_irq(host, 0);
- mmc_host_clk_release(host);
- }
pr_debug("%s: IRQ thread exiting with code %d\n",
mmc_hostname(host), ret);
return err;
}
} else if (host->caps & MMC_CAP_SDIO_IRQ) {
- mmc_host_clk_hold(host);
host->ops->enable_sdio_irq(host, 1);
- mmc_host_clk_release(host);
}
}
atomic_set(&host->sdio_irq_thread_abort, 1);
kthread_stop(host->sdio_irq_thread);
} else if (host->caps & MMC_CAP_SDIO_IRQ) {
- mmc_host_clk_hold(host);
host->ops->enable_sdio_irq(host, 0);
- mmc_host_clk_release(host);
}
}
/* for byte mode */
#define MMC_QUIRK_NONSTD_SDIO (1<<2) /* non-standard SDIO card attached */
/* (missing CIA registers) */
-#define MMC_QUIRK_BROKEN_CLK_GATING (1<<3) /* clock gating the sdio bus will make card fail */
#define MMC_QUIRK_NONSTD_FUNC_IF (1<<4) /* SDIO card has nonstd function interfaces */
#define MMC_QUIRK_DISABLE_CD (1<<5) /* disconnect CD/DAT[3] resistor */
#define MMC_QUIRK_INAND_CMD38 (1<<6) /* iNAND devices have broken CMD38 */
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 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;
-#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 */
return host->caps2 & MMC_CAP2_PACKED_WR;
}
-#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
-
static inline int mmc_card_hs(struct mmc_card *card)
{
return card->host->ios.timing == MMC_TIMING_SD_HS ||
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