#include <linux/scatterlist.h>
#include <linux/log2.h>
#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
#include <linux/wakelock.h>
#include <linux/mmc/card.h>
#include "sdio_ops.h"
static struct workqueue_struct *workqueue;
-static struct wake_lock mmc_delayed_work_wake_lock;
/*
* Enabling software CRCs on the data blocks can be a significant (30%)
int use_spi_crc = 1;
module_param(use_spi_crc, bool, 0);
+/*
+ * We normally treat cards as removed during suspend if they are not
+ * known to be on a non-removable bus, to avoid the risk of writing
+ * back data to a different card after resume. Allow this to be
+ * overridden if necessary.
+ */
+#ifdef CONFIG_MMC_UNSAFE_RESUME
+int mmc_assume_removable;
+#else
+int mmc_assume_removable = 1;
+#endif
+EXPORT_SYMBOL(mmc_assume_removable);
+module_param_named(removable, mmc_assume_removable, bool, 0644);
+MODULE_PARM_DESC(
+ removable,
+ "MMC/SD cards are removable and may be removed during suspend");
+
/*
* Internal function. Schedule delayed work in the MMC work queue.
*/
static int mmc_schedule_delayed_work(struct delayed_work *work,
unsigned long delay)
{
- wake_lock(&mmc_delayed_work_wake_lock);
return queue_delayed_work(workqueue, work, delay);
}
if (mrq->done)
mrq->done(mrq);
+
+ mmc_host_clk_release(host);
}
}
WARN_ON(!host->claimed);
- led_trigger_event(host->led, LED_FULL);
-
mrq->cmd->error = 0;
mrq->cmd->mrq = mrq;
if (mrq->data) {
mrq->stop->mrq = mrq;
}
}
+ mmc_host_clk_hold(host);
+ led_trigger_event(host->led, LED_FULL);
host->ops->request(host, mrq);
}
*/
void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
{
+#if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
+ unsigned long datasize, waittime = 0xFFFF;
+ u32 multi, unit;
+#endif
+
DECLARE_COMPLETION_ONSTACK(complete);
mrq->done_data = &complete;
mmc_start_request(host, mrq);
+#if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
+ if( strncmp( mmc_hostname(host) ,"mmc0" , strlen("mmc0")) )
+ {
+ multi = (mrq->cmd->retries>0)?mrq->cmd->retries:1;
+ waittime = wait_for_completion_timeout(&complete,HZ*7*multi); //sdio; for cmd dead. Modifyed by xbw at 2011-06-02
+ }
+ else
+ {
+ //calculate the timeout value for SDMMC; added by xbw at 2011-09-27
+ if(mrq->data)
+ {
+ unit = 2*(1<<20);// unit=2MB
+ datasize = mrq->data->blksz*mrq->data->blocks;
+ multi = datasize/unit;
+ multi += (datasize%unit)?1:0;
+ multi = (multi>0) ? multi : 1;
+ multi += (mrq->cmd->retries>0)?1:0;
+ waittime = wait_for_completion_timeout(&complete,HZ*7*multi); //It should be longer than bottom driver's time,due to the sum of two cmd time.
+ //modifyed by xbw at 2011-10-08
+ //
+ //example:
+ //rk29_sdmmc_request_end..2336... CMD12 wait busy timeout!!!!! ====xbw=[sd_mmc]====
+ //mmc_wait_for_req..236.. !!!!! wait for CMD25 timeout ===xbw[mmc0]===
+ }
+ else
+ {
+ multi = (mrq->cmd->retries>0)?mrq->cmd->retries:1;
+ waittime = wait_for_completion_timeout(&complete,HZ*7*multi);
+ }
+ }
+
+ if(waittime <= 1)
+ {
+ host->doneflag = 0;
+ mrq->cmd->error = -EIO;
+
+ if(0 == mrq->cmd->retries)
+ {
+ printk(KERN_WARNING "%s..%d.. !!!!! wait for CMD%d timeout [%s]\n",\
+ __FUNCTION__, __LINE__, mrq->cmd->opcode, mmc_hostname(host));
+ }
+ }
+#else
wait_for_completion(&complete);
+#endif
}
EXPORT_SYMBOL(mmc_wait_for_req);
*/
int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
{
- struct mmc_request mrq;
+ struct mmc_request mrq = {0};
WARN_ON(!host->claimed);
- memset(&mrq, 0, sizeof(struct mmc_request));
-
memset(cmd->resp, 0, sizeof(cmd->resp));
cmd->retries = retries;
unsigned int timeout_us, limit_us;
timeout_us = data->timeout_ns / 1000;
- timeout_us += data->timeout_clks * 1000 /
- (card->host->ios.clock / 1000);
+ if (mmc_host_clk_rate(card->host))
+ timeout_us += data->timeout_clks * 1000 /
+ (mmc_host_clk_rate(card->host) / 1000);
if (data->flags & MMC_DATA_WRITE)
/*
}
EXPORT_SYMBOL(mmc_try_claim_host);
-static void mmc_do_release_host(struct mmc_host *host)
+/**
+ * mmc_do_release_host - release a claimed host
+ * @host: mmc host to release
+ *
+ * If you successfully claimed a host, this function will
+ * release it again.
+ */
+void mmc_do_release_host(struct mmc_host *host)
{
unsigned long flags;
wake_up(&host->wq);
}
}
+EXPORT_SYMBOL(mmc_do_release_host);
void mmc_host_deeper_disable(struct work_struct *work)
{
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".
*/
-void mmc_set_clock(struct mmc_host *host, unsigned int hz)
+static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
{
WARN_ON(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
+
/*
* Change the bus mode (open drain/push-pull) of a 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);
}
/**
/**
* mmc_regulator_set_ocr - set regulator to match host->ios voltage
- * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
+ * @mmc: the host to regulate
* @supply: regulator to use
+ * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
*
* Returns zero on success, else negative errno.
*
* a particular supply voltage. This would normally be called from the
* set_ios() method.
*/
-int mmc_regulator_set_ocr(struct regulator *supply, unsigned short vdd_bit)
+int mmc_regulator_set_ocr(struct mmc_host *mmc,
+ struct regulator *supply,
+ unsigned short vdd_bit)
{
int result = 0;
int min_uV, max_uV;
- int enabled;
-
- enabled = regulator_is_enabled(supply);
- if (enabled < 0)
- return enabled;
if (vdd_bit) {
int tmp;
else
result = 0;
- if (result == 0 && !enabled)
+ if (result == 0 && !mmc->regulator_enabled) {
result = regulator_enable(supply);
- } else if (enabled) {
+ if (!result)
+ mmc->regulator_enabled = true;
+ }
+ } else if (mmc->regulator_enabled) {
result = regulator_disable(supply);
+ if (result == 0)
+ mmc->regulator_enabled = false;
}
+ if (result)
+ dev_err(mmc_dev(mmc),
+ "could not set regulator OCR (%d)\n", result);
return result;
}
EXPORT_SYMBOL(mmc_regulator_set_ocr);
-#endif
+#endif /* CONFIG_REGULATOR */
/*
* Mask off any voltages we don't support and select
ocr &= 3 << bit;
+ mmc_host_clk_hold(host);
host->ios.vdd = bit;
mmc_set_ios(host);
+ mmc_host_clk_release(host);
} else {
pr_warning("%s: host doesn't support card's voltages\n",
mmc_hostname(host));
return ocr;
}
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11)
+{
+ struct mmc_command cmd = {0};
+ int err = 0;
+
+ BUG_ON(!host);
+
+ /*
+ * Send CMD11 only if the request is to switch the card to
+ * 1.8V signalling.
+ */
+ if ((signal_voltage != MMC_SIGNAL_VOLTAGE_330) && cmd11) {
+ 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)
+ return err;
+
+ if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
+ return -EIO;
+ }
+
+ host->ios.signal_voltage = signal_voltage;
+
+ if (host->ops->start_signal_voltage_switch)
+ err = host->ops->start_signal_voltage_switch(host, &host->ios);
+
+ return err;
+}
+
/*
* Select timing parameters for host.
*/
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);
+}
+
+/*
+ * Select appropriate driver type for 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 bit;
+ mmc_host_clk_hold(host);
+
/* If ocr is set, we use it */
if (host->ocr)
bit = ffs(host->ocr) - 1;
* to reach the minimum voltage.
*/
mmc_delay(10);
-
- if (host->f_min > 400000) {
- pr_warning("%s: Minimum clock frequency too high for "
- "identification mode\n", mmc_hostname(host));
- host->ios.clock = host->f_min;
- } else
- host->ios.clock = 400000;
+
+#if defined(CONFIG_SDMMC_RK29) || !defined(CONFIG_SDMMC_RK29_OLD) //Modifyed by xbw at 2011-11-17
+ host->ios.clock = host->f_min;
+#else
+ host->ios.clock = host->f_init;
+#endif
host->ios.power_mode = MMC_POWER_ON;
mmc_set_ios(host);
* time required to reach a stable voltage.
*/
mmc_delay(10);
+
+ mmc_host_clk_release(host);
}
-static void mmc_power_off(struct mmc_host *host)
+void mmc_power_off(struct mmc_host *host)
{
+ mmc_host_clk_hold(host);
+
host->ios.clock = 0;
host->ios.vdd = 0;
+
+ /*
+ * Reset ocr mask to be the highest possible voltage supported for
+ * this mmc host. This value will be used at next power up.
+ */
+ host->ocr = 1 << (fls(host->ocr_avail) - 1);
+
if (!mmc_host_is_spi(host)) {
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.bus_width = MMC_BUS_WIDTH_1;
host->ios.timing = MMC_TIMING_LEGACY;
mmc_set_ios(host);
+
+ mmc_host_clk_release(host);
}
/*
spin_unlock_irqrestore(&host->lock, flags);
}
+int mmc_resume_bus(struct mmc_host *host)
+{
+ unsigned long flags;
+
+ if (!mmc_bus_needs_resume(host))
+ return -EINVAL;
+
+ printk("%s: Starting deferred resume\n", mmc_hostname(host));
+ spin_lock_irqsave(&host->lock, flags);
+ host->bus_resume_flags &= ~MMC_BUSRESUME_NEEDS_RESUME;
+ host->rescan_disable = 0;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ mmc_bus_get(host);
+ if (host->bus_ops && !host->bus_dead) {
+ mmc_power_up(host);
+ BUG_ON(!host->bus_ops->resume);
+ host->bus_ops->resume(host);
+ }
+
+ if (host->bus_ops->detect && !host->bus_dead)
+ host->bus_ops->detect(host);
+
+ mmc_bus_put(host);
+ printk("%s: Deferred resume completed\n", mmc_hostname(host));
+ return 0;
+}
+
+EXPORT_SYMBOL(mmc_resume_bus);
+
/*
* Assign a mmc bus handler to a host. Only one bus handler may control a
* host at any given time.
}
/*
- * Remove the current bus handler from a host. Assumes that there are
- * no interesting cards left, so the bus is powered down.
+ * Remove the current bus handler from a host.
*/
void mmc_detach_bus(struct mmc_host *host)
{
spin_unlock_irqrestore(&host->lock, flags);
- mmc_power_off(host);
-
mmc_bus_put(host);
}
spin_unlock_irqrestore(&host->lock, flags);
#endif
+ wake_lock(&host->detect_wake_lock);
mmc_schedule_delayed_work(&host->detect, delay);
}
EXPORT_SYMBOL(mmc_detect_change);
+void mmc_init_erase(struct mmc_card *card)
+{
+ unsigned int sz;
+
+ if (is_power_of_2(card->erase_size))
+ card->erase_shift = ffs(card->erase_size) - 1;
+ else
+ card->erase_shift = 0;
-void mmc_rescan(struct work_struct *work)
+ /*
+ * It is possible to erase an arbitrarily large area of an SD or MMC
+ * card. That is not desirable because it can take a long time
+ * (minutes) potentially delaying more important I/O, and also the
+ * timeout calculations become increasingly hugely over-estimated.
+ * Consequently, 'pref_erase' is defined as a guide to limit erases
+ * to that size and alignment.
+ *
+ * For SD cards that define Allocation Unit size, limit erases to one
+ * Allocation Unit at a time. For MMC cards that define High Capacity
+ * Erase Size, whether it is switched on or not, limit to that size.
+ * Otherwise just have a stab at a good value. For modern cards it
+ * will end up being 4MiB. Note that if the value is too small, it
+ * can end up taking longer to erase.
+ */
+ if (mmc_card_sd(card) && card->ssr.au) {
+ card->pref_erase = card->ssr.au;
+ card->erase_shift = ffs(card->ssr.au) - 1;
+ } else if (card->ext_csd.hc_erase_size) {
+ card->pref_erase = card->ext_csd.hc_erase_size;
+ } else {
+ sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11;
+ if (sz < 128)
+ card->pref_erase = 512 * 1024 / 512;
+ else if (sz < 512)
+ card->pref_erase = 1024 * 1024 / 512;
+ else if (sz < 1024)
+ card->pref_erase = 2 * 1024 * 1024 / 512;
+ else
+ card->pref_erase = 4 * 1024 * 1024 / 512;
+ if (card->pref_erase < card->erase_size)
+ card->pref_erase = card->erase_size;
+ else {
+ sz = card->pref_erase % card->erase_size;
+ if (sz)
+ card->pref_erase += card->erase_size - sz;
+ }
+ }
+}
+
+static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
+ unsigned int arg, unsigned int qty)
{
- struct mmc_host *host =
- container_of(work, struct mmc_host, detect.work);
- u32 ocr;
- int err;
- int extend_wakelock = 0;
+ unsigned int erase_timeout;
- mmc_bus_get(host);
+ if (card->ext_csd.erase_group_def & 1) {
+ /* High Capacity Erase Group Size uses HC timeouts */
+ if (arg == MMC_TRIM_ARG)
+ erase_timeout = card->ext_csd.trim_timeout;
+ else
+ erase_timeout = card->ext_csd.hc_erase_timeout;
+ } else {
+ /* CSD Erase Group Size uses write timeout */
+ unsigned int mult = (10 << card->csd.r2w_factor);
+ unsigned int timeout_clks = card->csd.tacc_clks * mult;
+ unsigned int timeout_us;
+
+ /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */
+ if (card->csd.tacc_ns < 1000000)
+ timeout_us = (card->csd.tacc_ns * mult) / 1000;
+ else
+ timeout_us = (card->csd.tacc_ns / 1000) * mult;
- /* if there is a card registered, check whether it is still present */
- if ((host->bus_ops != NULL) && host->bus_ops->detect && !host->bus_dead)
- host->bus_ops->detect(host);
+ /*
+ * ios.clock is only a target. The real clock rate might be
+ * less but not that much less, so fudge it by multiplying by 2.
+ */
+ timeout_clks <<= 1;
+ timeout_us += (timeout_clks * 1000) /
+ (mmc_host_clk_rate(card->host) / 1000);
- mmc_bus_put(host);
+ erase_timeout = timeout_us / 1000;
+ /*
+ * Theoretically, the calculation could underflow so round up
+ * to 1ms in that case.
+ */
+ if (!erase_timeout)
+ erase_timeout = 1;
+ }
- mmc_bus_get(host);
+ /* Multiplier for secure operations */
+ if (arg & MMC_SECURE_ARGS) {
+ if (arg == MMC_SECURE_ERASE_ARG)
+ erase_timeout *= card->ext_csd.sec_erase_mult;
+ else
+ erase_timeout *= card->ext_csd.sec_trim_mult;
+ }
- /* if there still is a card present, stop here */
- if (host->bus_ops != NULL) {
- mmc_bus_put(host);
- goto out;
+ erase_timeout *= qty;
+
+ /*
+ * Ensure at least a 1 second timeout for SPI as per
+ * 'mmc_set_data_timeout()'
+ */
+ if (mmc_host_is_spi(card->host) && erase_timeout < 1000)
+ erase_timeout = 1000;
+
+ return erase_timeout;
+}
+
+static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
+ unsigned int arg,
+ unsigned int qty)
+{
+ unsigned int erase_timeout;
+
+ if (card->ssr.erase_timeout) {
+ /* Erase timeout specified in SD Status Register (SSR) */
+ erase_timeout = card->ssr.erase_timeout * qty +
+ card->ssr.erase_offset;
+ } else {
+ /*
+ * Erase timeout not specified in SD Status Register (SSR) so
+ * use 250ms per write block.
+ */
+ erase_timeout = 250 * qty;
}
- /* detect a newly inserted card */
+ /* Must not be less than 1 second */
+ if (erase_timeout < 1000)
+ erase_timeout = 1000;
+
+ return erase_timeout;
+}
+
+static unsigned int mmc_erase_timeout(struct mmc_card *card,
+ unsigned int arg,
+ unsigned int qty)
+{
+ if (mmc_card_sd(card))
+ return mmc_sd_erase_timeout(card, arg, qty);
+ else
+ return mmc_mmc_erase_timeout(card, arg, qty);
+}
+
+static int mmc_do_erase(struct mmc_card *card, unsigned int from,
+ unsigned int to, unsigned int arg)
+{
+ struct mmc_command cmd = {0};
+ unsigned int qty = 0;
+ int err;
/*
- * Only we can add a new handler, so it's safe to
- * release the lock here.
+ * qty is used to calculate the erase timeout which depends on how many
+ * erase groups (or allocation units in SD terminology) are affected.
+ * We count erasing part of an erase group as one erase group.
+ * For SD, the allocation units are always a power of 2. For MMC, the
+ * erase group size is almost certainly also power of 2, but it does not
+ * seem to insist on that in the JEDEC standard, so we fall back to
+ * division in that case. SD may not specify an allocation unit size,
+ * in which case the timeout is based on the number of write blocks.
+ *
+ * Note that the timeout for secure trim 2 will only be correct if the
+ * number of erase groups specified is the same as the total of all
+ * preceding secure trim 1 commands. Since the power may have been
+ * lost since the secure trim 1 commands occurred, it is generally
+ * impossible to calculate the secure trim 2 timeout correctly.
*/
- mmc_bus_put(host);
+ if (card->erase_shift)
+ qty += ((to >> card->erase_shift) -
+ (from >> card->erase_shift)) + 1;
+ else if (mmc_card_sd(card))
+ qty += to - from + 1;
+ else
+ qty += ((to / card->erase_size) -
+ (from / card->erase_size)) + 1;
- if (host->ops->get_cd && host->ops->get_cd(host) == 0)
+ if (!mmc_card_blockaddr(card)) {
+ from <<= 9;
+ to <<= 9;
+ }
+
+ if (mmc_card_sd(card))
+ cmd.opcode = SD_ERASE_WR_BLK_START;
+ else
+ cmd.opcode = MMC_ERASE_GROUP_START;
+ cmd.arg = from;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ printk(KERN_ERR "mmc_erase: group start error %d, "
+ "status %#x\n", err, cmd.resp[0]);
+ err = -EINVAL;
goto out;
+ }
- mmc_claim_host(host);
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ if (mmc_card_sd(card))
+ cmd.opcode = SD_ERASE_WR_BLK_END;
+ else
+ cmd.opcode = MMC_ERASE_GROUP_END;
+ cmd.arg = to;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ printk(KERN_ERR "mmc_erase: group end error %d, status %#x\n",
+ err, cmd.resp[0]);
+ err = -EINVAL;
+ goto out;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ cmd.opcode = MMC_ERASE;
+ cmd.arg = arg;
+ cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+ cmd.cmd_timeout_ms = mmc_erase_timeout(card, arg, qty);
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n",
+ err, cmd.resp[0]);
+ err = -EIO;
+ goto out;
+ }
+
+ if (mmc_host_is_spi(card->host))
+ goto out;
+
+ do {
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ cmd.opcode = MMC_SEND_STATUS;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ /* Do not retry else we can't see errors */
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err || (cmd.resp[0] & 0xFDF92000)) {
+ printk(KERN_ERR "error %d requesting status %#x\n",
+ err, cmd.resp[0]);
+ err = -EIO;
+ goto out;
+ }
+ } while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
+ R1_CURRENT_STATE(cmd.resp[0]) == 7);
+out:
+ return err;
+}
+
+/**
+ * mmc_erase - erase sectors.
+ * @card: card to erase
+ * @from: first sector to erase
+ * @nr: number of sectors to erase
+ * @arg: erase command argument (SD supports only %MMC_ERASE_ARG)
+ *
+ * Caller must claim host before calling this function.
+ */
+int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
+ unsigned int arg)
+{
+ unsigned int rem, to = from + nr;
+
+ if (!(card->host->caps & MMC_CAP_ERASE) ||
+ !(card->csd.cmdclass & CCC_ERASE))
+ return -EOPNOTSUPP;
+ if (!card->erase_size)
+ return -EOPNOTSUPP;
+
+ if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
+ return -EOPNOTSUPP;
+
+ if ((arg & MMC_SECURE_ARGS) &&
+ !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
+ return -EOPNOTSUPP;
+
+ if ((arg & MMC_TRIM_ARGS) &&
+ !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
+ return -EOPNOTSUPP;
+
+ if (arg == MMC_SECURE_ERASE_ARG) {
+ if (from % card->erase_size || nr % card->erase_size)
+ return -EINVAL;
+ }
+
+ if (arg == MMC_ERASE_ARG) {
+ rem = from % card->erase_size;
+ if (rem) {
+ rem = card->erase_size - rem;
+ from += rem;
+ if (nr > rem)
+ nr -= rem;
+ else
+ return 0;
+ }
+ rem = nr % card->erase_size;
+ if (rem)
+ nr -= rem;
+ }
+
+ if (nr == 0)
+ return 0;
+
+ to = from + nr;
+
+ if (to <= from)
+ return -EINVAL;
+
+ /* 'from' and 'to' are inclusive */
+ to -= 1;
+
+ return mmc_do_erase(card, from, to, arg);
+}
+EXPORT_SYMBOL(mmc_erase);
+
+int mmc_can_erase(struct mmc_card *card)
+{
+ if ((card->host->caps & MMC_CAP_ERASE) &&
+ (card->csd.cmdclass & CCC_ERASE) && card->erase_size)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_erase);
+
+int mmc_can_trim(struct mmc_card *card)
+{
+ if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_trim);
+
+int mmc_can_secure_erase_trim(struct mmc_card *card)
+{
+ if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_secure_erase_trim);
+
+int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
+ unsigned int nr)
+{
+ if (!card->erase_size)
+ return 0;
+ if (from % card->erase_size || nr % card->erase_size)
+ return 0;
+ return 1;
+}
+EXPORT_SYMBOL(mmc_erase_group_aligned);
+
+int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
+{
+ struct mmc_command cmd = {0};
+
+ if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card))
+ return 0;
+
+ cmd.opcode = MMC_SET_BLOCKLEN;
+ cmd.arg = blocklen;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+ return mmc_wait_for_cmd(card->host, &cmd, 5);
+}
+EXPORT_SYMBOL(mmc_set_blocklen);
+
+static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
+{
+ host->f_init = freq;
+
+#if defined(CONFIG_SDMMC_RK29) || !defined(CONFIG_SDMMC_RK29_OLD) //Modifyed by xbw at 2011-11-17
+ int init_ret=0;
+#endif
+
+#ifdef CONFIG_MMC_DEBUG
+ pr_info("%s: %s: trying to init card at %u Hz\n",
+ mmc_hostname(host), __func__, host->f_init);
+#endif
mmc_power_up(host);
+
+ /*
+ * sdio_reset sends CMD52 to reset card. Since we do not know
+ * if the card is being re-initialized, just send it. CMD52
+ * should be ignored by SD/eMMC cards.
+ */
+#if defined(CONFIG_SDMMC_RK29) || !defined(CONFIG_SDMMC_RK29_OLD) //Modifyed by xbw at 2011-11-17
+//the process is default for rockchip SDK. noted by xbw at 2011-11-17
+
+/* Order's important: probe SDIO, then SD, then MMC */
+
+#if !defined(CONFIG_USE_SDMMC0_FOR_WIFI_DEVELOP_BOARD)
+ if( strncmp( mmc_hostname(host) ,"mmc0" , strlen("mmc0")) )
+ {
+ //sdio_reset(host);//make no sense; noteed by xbw at 2011-12-14
+ mmc_go_idle(host);
+
+ if (!(init_ret=mmc_attach_sdio(host)))
+ {
+ printk(KERN_INFO "%s..%d.. ===== Initialize SDIO successfully. [%s]\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+ return 0;
+ }
+ else
+ {
+ if(0xFF!=init_ret)
+ {
+ printk(KERN_WARNING "\n=====\n %s..%d.. ===== Initialize SDIO-card unsuccessfully!!! [%s]\n=====\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ goto freq_out;
+ }
+ }
+ }
+ else
+ {
+ mmc_go_idle(host);
+ }
+#else
+ //sdio_reset(host); //make no sense; noteed by xbw at 2011-12-14
+ mmc_go_idle(host);
+
+ if (!(init_ret=mmc_attach_sdio(host)))
+ {
+ printk(KERN_INFO "%s..%d.. ===== Initialize SDIO successfully. [%s]\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+ return 0;
+ }
+ else
+ {
+ if(0xFF!=init_ret)
+ {
+ printk(KERN_WARNING "\n=====\n %s..%d.. ===== Initialize SDIO-card unsuccessfully!!! [%s]\n=====\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ goto freq_out;
+ }
+ }
+#endif // #end--#if !defined(CONFIG_USE_SDMMC0_FOR_WIFI_DEVELOP_BOARD)
+
+ if (!(init_ret=mmc_attach_sd(host)))
+ {
+ printk(KERN_INFO "%s..%d.. ===== Initialize SD-card successfully. [%s]\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ return 0;
+ }
+ else
+ {
+ if(0xFF!=init_ret)
+ {
+ printk(KERN_WARNING "\n=====\n%s..%d.. ===== Initialize SD-card unsuccessfully! [%s]\n====\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ goto freq_out;
+ }
+ }
+
+
+ if (!(init_ret=mmc_attach_mmc(host)))
+ {
+ printk(KERN_INFO "%s...%d.. ===== Initialize MMC-card successfully. [%s]\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ return 0;
+ }
+ else
+ {
+ if(0xFF!=init_ret)
+ {
+ printk(KERN_WARNING "\n =====\n%s..%d.. ===== Initialize MMC-card unsuccessfully!!! [%s]\n======\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ goto freq_out;
+ }
+ }
+
+freq_out:
+ mmc_power_off(host);
+ return -EIO;
+
+#else // the default process in ICS.
+
+ sdio_reset(host);
mmc_go_idle(host);
mmc_send_if_cond(host, host->ocr_avail);
+ /* Order's important: probe SDIO, then SD, then MMC */
+ if (!mmc_attach_sdio(host))
+ return 0;
+ if (!mmc_attach_sd(host))
+ return 0;
+ if (!mmc_attach_mmc(host))
+ return 0;
+
+ mmc_power_off(host);
+ return -EIO;
+#endif
+
+}
+
+void mmc_rescan(struct work_struct *work)
+{
+ static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
+ struct mmc_host *host =
+ container_of(work, struct mmc_host, detect.work);
+ int i;
+ bool extend_wakelock = false;
+
+ if (host->rescan_disable)
+ return;
+
+ mmc_bus_get(host);
+
/*
- * First we search for SDIO...
+ * if there is a _removable_ card registered, check whether it is
+ * still present
*/
- err = mmc_send_io_op_cond(host, 0, &ocr);
- if (!err) {
- if (mmc_attach_sdio(host, ocr))
- mmc_power_off(host);
+ if (host->bus_ops && host->bus_ops->detect && !host->bus_dead
+ && !(host->caps & MMC_CAP_NONREMOVABLE))
+ host->bus_ops->detect(host);
+
+ /* If the card was removed the bus will be marked
+ * as dead - extend the wakelock so userspace
+ * can respond */
+ if (host->bus_dead)
extend_wakelock = 1;
- goto out;
- }
/*
- * ...then normal SD...
+ * Let mmc_bus_put() free the bus/bus_ops if we've found that
+ * the card is no longer present.
*/
- err = mmc_send_app_op_cond(host, 0, &ocr);
- if (!err) {
- if (mmc_attach_sd(host, ocr))
- mmc_power_off(host);
- extend_wakelock = 1;
+ mmc_bus_put(host);
+ mmc_bus_get(host);
+
+ /* if there still is a card present, stop here */
+ if (host->bus_ops != NULL) {
+ mmc_bus_put(host);
goto out;
}
/*
- * ...and finally MMC.
+ * Only we can add a new handler, so it's safe to
+ * release the lock here.
*/
- err = mmc_send_op_cond(host, 0, &ocr);
- if (!err) {
- if (mmc_attach_mmc(host, ocr))
- mmc_power_off(host);
- extend_wakelock = 1;
+ mmc_bus_put(host);
+
+#if defined(CONFIG_SDMMC_RK29) || !defined(CONFIG_SDMMC_RK29_OLD) //Modifyed by xbw at 2011-11-17
+ printk(KERN_INFO "\n%s...%d.. ===== mmc_rescan Begin....[%s]\n",__FILE__, __LINE__, mmc_hostname(host));
+#endif
+
+ if (host->ops->get_cd && host->ops->get_cd(host) == 0)
+ {
+#if defined(CONFIG_SDMMC_RK29) || !defined(CONFIG_SDMMC_RK29_OLD) //Modifyed by xbw at 2011-11-17
+ printk(KERN_WARNING "\n=================\n%s..%d.. ====find no SDMMC host. [%s]\n", \
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+#endif
+
goto out;
}
+ mmc_claim_host(host);
+
+#if defined(CONFIG_SDMMC_RK29) || !defined(CONFIG_SDMMC_RK29_OLD) //Modifyed by xbw at 2011-11-17
+ if (!mmc_rescan_try_freq(host, host->f_min))
+ extend_wakelock = true;
+
+#else
+ for (i = 0; i < ARRAY_SIZE(freqs); i++) {
+ if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) {
+ extend_wakelock = true;
+ break;
+ }
+ if (freqs[i] <= host->f_min)
+ break;
+ }
+#endif
+
mmc_release_host(host);
- mmc_power_off(host);
-out:
+ out:
if (extend_wakelock)
- wake_lock_timeout(&mmc_delayed_work_wake_lock, HZ / 2);
+ wake_lock_timeout(&host->detect_wake_lock, HZ / 2);
else
- wake_unlock(&mmc_delayed_work_wake_lock);
-
- if (host->caps & MMC_CAP_NEEDS_POLL)
+ wake_unlock(&host->detect_wake_lock);
+ if (host->caps & MMC_CAP_NEEDS_POLL) {
+ wake_lock(&host->detect_wake_lock);
mmc_schedule_delayed_work(&host->detect, HZ);
+ }
}
void mmc_start_host(struct mmc_host *host)
if (host->caps & MMC_CAP_DISABLE)
cancel_delayed_work(&host->disable);
- cancel_delayed_work(&host->detect);
+ if (cancel_delayed_work_sync(&host->detect))
+ wake_unlock(&host->detect_wake_lock);
mmc_flush_scheduled_work();
+ /* clear pm flags now and let card drivers set them as needed */
+ host->pm_flags = 0;
+
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
if (host->bus_ops->remove)
mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_power_off(host);
mmc_release_host(host);
mmc_bus_put(host);
return;
mmc_power_off(host);
}
-void mmc_power_save_host(struct mmc_host *host)
+int mmc_power_save_host(struct mmc_host *host)
{
+ int ret = 0;
+
mmc_bus_get(host);
if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) {
mmc_bus_put(host);
- return;
+ return -EINVAL;
}
if (host->bus_ops->power_save)
- host->bus_ops->power_save(host);
+ ret = host->bus_ops->power_save(host);
mmc_bus_put(host);
mmc_power_off(host);
+
+ return ret;
}
EXPORT_SYMBOL(mmc_power_save_host);
-void mmc_power_restore_host(struct mmc_host *host)
+int mmc_power_restore_host(struct mmc_host *host)
{
+ int ret;
+
mmc_bus_get(host);
if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) {
mmc_bus_put(host);
- return;
+ return -EINVAL;
}
mmc_power_up(host);
- host->bus_ops->power_restore(host);
+ ret = host->bus_ops->power_restore(host);
mmc_bus_put(host);
+
+ return ret;
}
EXPORT_SYMBOL(mmc_power_restore_host);
/**
* mmc_suspend_host - suspend a host
* @host: mmc host
- * @state: suspend mode (PM_SUSPEND_xxx)
*/
-int mmc_suspend_host(struct mmc_host *host, pm_message_t state)
+int mmc_suspend_host(struct mmc_host *host)
{
int err = 0;
+ if (mmc_bus_needs_resume(host))
+ return 0;
+
if (host->caps & MMC_CAP_DISABLE)
cancel_delayed_work(&host->disable);
- cancel_delayed_work(&host->detect);
+ if (cancel_delayed_work(&host->detect))
+ wake_unlock(&host->detect_wake_lock);
mmc_flush_scheduled_work();
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
if (host->bus_ops->suspend)
err = host->bus_ops->suspend(host);
+
+#if defined(CONFIG_SDMMC_RK29) && defined(CONFIG_SDMMC_RK29_OLD)
+ //deleted all detail code. //fix the crash bug when error occur during suspend. Modiefyed by xbw at 2012-08-09
+#else
if (err == -ENOSYS || !host->bus_ops->resume) {
/*
* We simply "remove" the card in this case.
host->bus_ops->remove(host);
mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_power_off(host);
mmc_release_host(host);
+ host->pm_flags = 0;
err = 0;
}
+#endif
+ flush_delayed_work(&host->disable);
}
mmc_bus_put(host);
- if (!err)
+ if (!err && !mmc_card_keep_power(host))
mmc_power_off(host);
return err;
int err = 0;
mmc_bus_get(host);
+ if (mmc_bus_manual_resume(host)) {
+ host->bus_resume_flags |= MMC_BUSRESUME_NEEDS_RESUME;
+ mmc_bus_put(host);
+ return 0;
+ }
+
if (host->bus_ops && !host->bus_dead) {
- mmc_power_up(host);
- mmc_select_voltage(host, host->ocr);
+ if (!mmc_card_keep_power(host)) {
+ mmc_power_up(host);
+ mmc_select_voltage(host, host->ocr);
+ /*
+ * Tell runtime PM core we just powered up the card,
+ * since it still believes the card is powered off.
+ * Note that currently runtime PM is only enabled
+ * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
+ */
+ if (mmc_card_sdio(host->card) &&
+ (host->caps & MMC_CAP_POWER_OFF_CARD)) {
+ pm_runtime_disable(&host->card->dev);
+ pm_runtime_set_active(&host->card->dev);
+ pm_runtime_enable(&host->card->dev);
+ }
+ }
BUG_ON(!host->bus_ops->resume);
+#if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
+ //panic if the card is being removed during the resume, deleted by xbw at 2011-06-20
+ host->bus_ops->resume(host);
+
+#else
err = host->bus_ops->resume(host);
if (err) {
printk(KERN_WARNING "%s: error %d during resume "
"(card was removed?)\n",
mmc_hostname(host), err);
- if (host->bus_ops->remove)
- host->bus_ops->remove(host);
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_release_host(host);
- /* no need to bother upper layers */
err = 0;
}
+#endif
}
+ host->pm_flags &= ~MMC_PM_KEEP_POWER;
mmc_bus_put(host);
- /*
- * We add a slight delay here so that resume can progress
- * in parallel.
- */
- mmc_detect_change(host, 1);
-
return err;
}
-
EXPORT_SYMBOL(mmc_resume_host);
+/* Do the card removal on suspend if card is assumed removeable
+ * Do that in pm notifier while userspace isn't yet frozen, so we will be able
+ to sync the card.
+*/
+int mmc_pm_notify(struct notifier_block *notify_block,
+ unsigned long mode, void *unused)
+{
+ struct mmc_host *host = container_of(
+ notify_block, struct mmc_host, pm_notify);
+ unsigned long flags;
+
+
+ switch (mode) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (mmc_bus_needs_resume(host)) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ break;
+ }
+ host->rescan_disable = 1;
+ spin_unlock_irqrestore(&host->lock, flags);
+ if (cancel_delayed_work_sync(&host->detect))
+ wake_unlock(&host->detect_wake_lock);
+
+ if (!host->bus_ops || host->bus_ops->suspend)
+ break;
+
+ mmc_claim_host(host);
+
+ if (host->bus_ops->remove)
+ host->bus_ops->remove(host);
+
+ mmc_detach_bus(host);
+ mmc_power_off(host);
+ mmc_release_host(host);
+ host->pm_flags = 0;
+ break;
+
+ case PM_POST_SUSPEND:
+ case PM_POST_HIBERNATION:
+ case PM_POST_RESTORE:
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (mmc_bus_manual_resume(host)) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ break;
+ }
+ host->rescan_disable = 0;
+ spin_unlock_irqrestore(&host->lock, flags);
+ mmc_detect_change(host, 0);
+
+ }
+
+ return 0;
+}
#endif
#ifdef CONFIG_MMC_EMBEDDED_SDIO
{
int ret;
- wake_lock_init(&mmc_delayed_work_wake_lock, WAKE_LOCK_SUSPEND, "mmc_delayed_work");
-
- workqueue = create_singlethread_workqueue("kmmcd");
+ workqueue = alloc_ordered_workqueue("kmmcd", 0);
if (!workqueue)
return -ENOMEM;
mmc_unregister_host_class();
mmc_unregister_bus();
destroy_workqueue(workqueue);
- wake_lock_destroy(&mmc_delayed_work_wake_lock);
}
subsys_initcall(mmc_init);
projects / firefly-linux-kernel-4.4.55.git / blobdiff