#include <linux/regulator/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/suspend.h>
+#include <linux/fault-inject.h>
+#include <linux/random.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
flush_workqueue(workqueue);
}
+#ifdef CONFIG_FAIL_MMC_REQUEST
+
+/*
+ * Internal function. Inject random data errors.
+ * If mmc_data is NULL no errors are injected.
+ */
+static void mmc_should_fail_request(struct mmc_host *host,
+ struct mmc_request *mrq)
+{
+ struct mmc_command *cmd = mrq->cmd;
+ struct mmc_data *data = mrq->data;
+ static const int data_errors[] = {
+ -ETIMEDOUT,
+ -EILSEQ,
+ -EIO,
+ };
+
+ if (!data)
+ return;
+
+ if (cmd->error || data->error ||
+ !should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
+ return;
+
+ data->error = data_errors[random32() % ARRAY_SIZE(data_errors)];
+ data->bytes_xfered = (random32() % (data->bytes_xfered >> 9)) << 9;
+}
+
+#else /* CONFIG_FAIL_MMC_REQUEST */
+
+static inline void mmc_should_fail_request(struct mmc_host *host,
+ struct mmc_request *mrq)
+{
+}
+
+#endif /* CONFIG_FAIL_MMC_REQUEST */
+
/**
* mmc_request_done - finish processing an MMC request
* @host: MMC host which completed request
}
if (err && cmd->retries) {
- pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
- mmc_hostname(host), cmd->opcode, err);
-
- cmd->retries--;
- cmd->error = 0;
- host->ops->request(host, mrq);
+ /*
+ * Request starter must handle retries - see
+ * mmc_wait_for_req_done().
+ */
+ if (mrq->done)
+ mrq->done(mrq);
} else {
+ mmc_should_fail_request(host, mrq);
+
led_trigger_event(host->led, LED_OFF);
pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
static void mmc_wait_for_req_done(struct mmc_host *host,
struct mmc_request *mrq)
{
- wait_for_completion(&mrq->completion);
+ struct mmc_command *cmd;
+
+ while (1) {
+ wait_for_completion(&mrq->completion);
+
+ cmd = mrq->cmd;
+ if (!cmd->error || !cmd->retries)
+ break;
+
+ pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
+ mmc_hostname(host), cmd->opcode, cmd->error);
+ cmd->retries--;
+ cmd->error = 0;
+ host->ops->request(host, mrq);
+ }
}
/**
mmc_wait_for_req_done(host, host->areq->mrq);
err = host->areq->err_check(host->card, host->areq);
if (err) {
+ /* post process the completed failed request */
mmc_post_req(host, host->areq->mrq, 0);
if (areq)
+ /*
+ * Cancel the new prepared request, because
+ * it can't run until the failed
+ * request has been properly handled.
+ */
mmc_post_req(host, areq->mrq, -EINVAL);
host->areq = NULL;
}
EXPORT_SYMBOL(mmc_wait_for_req);
+/**
+ * mmc_interrupt_hpi - Issue for High priority Interrupt
+ * @card: the MMC card associated with the HPI transfer
+ *
+ * Issued High Priority Interrupt, and check for card status
+ * util out-of prg-state.
+ */
+int mmc_interrupt_hpi(struct mmc_card *card)
+{
+ int err;
+ u32 status;
+
+ BUG_ON(!card);
+
+ if (!card->ext_csd.hpi_en) {
+ pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
+ return 1;
+ }
+
+ mmc_claim_host(card->host);
+ err = mmc_send_status(card, &status);
+ if (err) {
+ pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
+ goto out;
+ }
+
+ /*
+ * If the card status is in PRG-state, we can send the HPI command.
+ */
+ if (R1_CURRENT_STATE(status) == R1_STATE_PRG) {
+ do {
+ /*
+ * We don't know when the HPI command will finish
+ * processing, so we need to resend HPI until out
+ * of prg-state, and keep checking the card status
+ * with SEND_STATUS. If a timeout error occurs when
+ * sending the HPI command, we are already out of
+ * prg-state.
+ */
+ err = mmc_send_hpi_cmd(card, &status);
+ if (err)
+ pr_debug("%s: abort HPI (%d error)\n",
+ mmc_hostname(card->host), err);
+
+ err = mmc_send_status(card, &status);
+ if (err)
+ break;
+ } while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
+ } else
+ pr_debug("%s: Left prg-state\n", mmc_hostname(card->host));
+
+out:
+ mmc_release_host(card->host);
+ return err;
+}
+EXPORT_SYMBOL(mmc_interrupt_hpi);
+
/**
* mmc_wait_for_cmd - start a command and wait for completion
* @host: MMC host to start command
*/
int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
{
- struct mmc_request mrq = {0};
+ struct mmc_request mrq = {NULL};
WARN_ON(!host->claimed);
data->timeout_clks = 0;
}
}
+
+ /*
+ * Some cards require longer data read timeout than indicated in CSD.
+ * Address this by setting the read timeout to a "reasonably high"
+ * value. For the cards tested, 300ms has proven enough. If necessary,
+ * this value can be increased if other problematic cards require this.
+ */
+ if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) {
+ data->timeout_ns = 300000000;
+ data->timeout_clks = 0;
+ }
+
/*
* Some cards need very high timeouts if driven in SPI mode.
* The worst observed timeout was 900ms after writing a
mmc_host_clk_release(host);
}
+static void mmc_poweroff_notify(struct mmc_host *host)
+{
+ struct mmc_card *card;
+ unsigned int timeout;
+ unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION;
+ int err = 0;
+
+ card = host->card;
+
+ /*
+ * Send power notify command only if card
+ * is mmc and notify state is powered ON
+ */
+ 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;
+ }
+}
+
/*
* Apply power to the MMC stack. This is a two-stage process.
* First, we enable power to the card without the clock running.
bit = fls(host->ocr_avail) - 1;
host->ios.vdd = bit;
- if (mmc_host_is_spi(host)) {
+ if (mmc_host_is_spi(host))
host->ios.chip_select = MMC_CS_HIGH;
- host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
- } else {
+ else
host->ios.chip_select = MMC_CS_DONTCARE;
- host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
- }
+ host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
host->ios.power_mode = MMC_POWER_UP;
host->ios.bus_width = MMC_BUS_WIDTH_1;
host->ios.timing = MMC_TIMING_LEGACY;
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;
+ mmc_poweroff_notify(host);
+
/*
* Reset ocr mask to be the highest possible voltage supported for
* this mmc host. This value will be used at next power up.
host->ios.timing = MMC_TIMING_LEGACY;
mmc_set_ios(host);
+ /*
+ * Some configurations, such as the 802.11 SDIO card in the OLPC
+ * XO-1.5, require a short delay after poweroff before the card
+ * can be successfully turned on again.
+ */
+ mmc_delay(1);
+
mmc_host_clk_release(host);
}
}
/*
- * 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);
}
{
unsigned int erase_timeout;
- if (card->ext_csd.erase_group_def & 1) {
+ if (arg == MMC_DISCARD_ARG ||
+ (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) {
+ erase_timeout = card->ext_csd.trim_timeout;
+ } else 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;
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, "
+ pr_err("mmc_erase: group start error %d, "
"status %#x\n", err, cmd.resp[0]);
- err = -EINVAL;
+ err = -EIO;
goto out;
}
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",
+ pr_err("mmc_erase: group end error %d, status %#x\n",
err, cmd.resp[0]);
- err = -EINVAL;
+ err = -EIO;
goto out;
}
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",
+ pr_err("mmc_erase: erase error %d, status %#x\n",
err, cmd.resp[0]);
err = -EIO;
goto out;
/* 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",
+ pr_err("error %d requesting status %#x\n",
err, cmd.resp[0]);
err = -EIO;
goto out;
}
EXPORT_SYMBOL(mmc_can_trim);
+int mmc_can_discard(struct mmc_card *card)
+{
+ /*
+ * As there's no way to detect the discard support bit at v4.5
+ * use the s/w feature support filed.
+ */
+ if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_discard);
+
+int mmc_can_sanitize(struct mmc_card *card)
+{
+ if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_sanitize);
+
int mmc_can_secure_erase_trim(struct mmc_card *card)
{
if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
}
EXPORT_SYMBOL(mmc_set_blocklen);
+static void mmc_hw_reset_for_init(struct mmc_host *host)
+{
+ 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_can_reset(struct mmc_card *card)
+{
+ u8 rst_n_function;
+
+ if (!mmc_card_mmc(card))
+ return 0;
+ rst_n_function = card->ext_csd.rst_n_function;
+ if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
+ return 0;
+ return 1;
+}
+EXPORT_SYMBOL(mmc_can_reset);
+
+static int mmc_do_hw_reset(struct mmc_host *host, int check)
+{
+ struct mmc_card *card = host->card;
+
+ if (!host->bus_ops->power_restore)
+ return -EOPNOTSUPP;
+
+ if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+ return -EOPNOTSUPP;
+
+ if (!card)
+ return -EINVAL;
+
+ if (!mmc_can_reset(card))
+ return -EOPNOTSUPP;
+
+ mmc_host_clk_hold(host);
+ mmc_set_clock(host, host->f_init);
+
+ host->ops->hw_reset(host);
+
+ /* If the reset has happened, then a status command will fail */
+ if (check) {
+ struct mmc_command cmd = {0};
+ int err;
+
+ cmd.opcode = MMC_SEND_STATUS;
+ if (!mmc_host_is_spi(card->host))
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (!err) {
+ mmc_host_clk_release(host);
+ return -ENOSYS;
+ }
+ }
+
+ host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_DDR);
+ if (mmc_host_is_spi(host)) {
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+ } else {
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ }
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+ host->ios.timing = MMC_TIMING_LEGACY;
+ mmc_set_ios(host);
+
+ mmc_host_clk_release(host);
+
+ return host->bus_ops->power_restore(host);
+}
+
+int mmc_hw_reset(struct mmc_host *host)
+{
+ return mmc_do_hw_reset(host, 0);
+}
+EXPORT_SYMBOL(mmc_hw_reset);
+
+int mmc_hw_reset_check(struct mmc_host *host)
+{
+ return mmc_do_hw_reset(host, 1);
+}
+EXPORT_SYMBOL(mmc_hw_reset_check);
+
static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
{
host->f_init = freq;
#endif
mmc_power_up(host);
+ /*
+ * Some eMMCs (with VCCQ always on) may not be reset after power up, so
+ * do a hardware reset if possible.
+ */
+ mmc_hw_reset_for_init(host);
+
/*
* sdio_reset sends CMD52 to reset card. Since we do not know
* if the card is being re-initialized, just send it. CMD52
mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_power_off(host);
mmc_release_host(host);
mmc_bus_put(host);
return;
mmc_bus_get(host);
- if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+ if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep)
err = host->bus_ops->sleep(host);
mmc_bus_put(host);
}
EXPORT_SYMBOL(mmc_card_can_sleep);
+/*
+ * Flush the cache to the non-volatile storage.
+ */
+int mmc_flush_cache(struct mmc_card *card)
+{
+ struct mmc_host *host = card->host;
+ int err = 0;
+
+ if (!(host->caps2 & MMC_CAP2_CACHE_CTRL))
+ return err;
+
+ if (mmc_card_mmc(card) &&
+ (card->ext_csd.cache_size > 0) &&
+ (card->ext_csd.cache_ctrl & 1)) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_FLUSH_CACHE, 1, 0);
+ if (err)
+ pr_err("%s: cache flush error %d\n",
+ mmc_hostname(card->host), err);
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(mmc_flush_cache);
+
+/*
+ * Turn the cache ON/OFF.
+ * Turning the cache OFF shall trigger flushing of the data
+ * to the non-volatile storage.
+ */
+int mmc_cache_ctrl(struct mmc_host *host, u8 enable)
+{
+ struct mmc_card *card = host->card;
+ int err = 0;
+
+ if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) ||
+ mmc_card_is_removable(host))
+ return err;
+
+ if (card && mmc_card_mmc(card) &&
+ (card->ext_csd.cache_size > 0)) {
+ enable = !!enable;
+
+ if (card->ext_csd.cache_ctrl ^ enable)
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_CACHE_CTRL, enable, 0);
+ if (err)
+ pr_err("%s: cache %s error %d\n",
+ mmc_hostname(card->host),
+ enable ? "on" : "off",
+ err);
+ else
+ card->ext_csd.cache_ctrl = enable;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(mmc_cache_ctrl);
+
#ifdef CONFIG_PM
/**
cancel_delayed_work(&host->disable);
cancel_delayed_work(&host->detect);
mmc_flush_scheduled_work();
+ err = mmc_cache_ctrl(host, 0);
+ if (err)
+ goto out;
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
- if (host->bus_ops->suspend)
- err = host->bus_ops->suspend(host);
- if (err == -ENOSYS || !host->bus_ops->resume) {
- /*
- * We simply "remove" the card in this case.
- * It will be redetected on resume.
- */
- if (host->bus_ops->remove)
- host->bus_ops->remove(host);
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_release_host(host);
- host->pm_flags = 0;
- err = 0;
+
+ /*
+ * A long response time is not acceptable for device drivers
+ * when doing suspend. Prevent mmc_claim_host in the suspend
+ * sequence, to potentially wait "forever" by trying to
+ * pre-claim the host.
+ */
+ if (mmc_try_claim_host(host)) {
+ if (host->bus_ops->suspend) {
+ /*
+ * For eMMC 4.5 device send notify command
+ * before sleep, because in sleep state eMMC 4.5
+ * devices respond to only RESET and AWAKE cmd
+ */
+ mmc_poweroff_notify(host);
+ err = host->bus_ops->suspend(host);
+ }
+ mmc_do_release_host(host);
+
+ if (err == -ENOSYS || !host->bus_ops->resume) {
+ /*
+ * We simply "remove" the card in this case.
+ * It will be redetected on resume.
+ */
+ if (host->bus_ops->remove)
+ 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;
+ }
+ } else {
+ err = -EBUSY;
}
}
mmc_bus_put(host);
if (!err && !mmc_card_keep_power(host))
mmc_power_off(host);
+out:
return err;
}
BUG_ON(!host->bus_ops->resume);
err = host->bus_ops->resume(host);
if (err) {
- printk(KERN_WARNING "%s: error %d during resume "
+ pr_warning("%s: error %d during resume "
"(card was removed?)\n",
mmc_hostname(host), err);
err = 0;
spin_lock_irqsave(&host->lock, flags);
host->rescan_disable = 1;
+ host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
spin_unlock_irqrestore(&host->lock, flags);
cancel_delayed_work_sync(&host->detect);
host->bus_ops->remove(host);
mmc_detach_bus(host);
+ mmc_power_off(host);
mmc_release_host(host);
host->pm_flags = 0;
break;
spin_lock_irqsave(&host->lock, flags);
host->rescan_disable = 0;
+ host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG;
spin_unlock_irqrestore(&host->lock, flags);
mmc_detect_change(host, 0);
git.openpandora.org / pandora-kernel.git / blobdiff