Add the CMDQ support to SDHCI host interface and CHT SDHCI
host interface
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 121 +++++++++++++++++++++++++++++++++++++++------
include/linux/mmc/sdhci.h | 1 +
2 files changed, 108 insertions(+), 14 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index bac74ca..da94355 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -743,14 +743,14 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
struct mmc_data *data = cmd->data;
int ret;
- WARN_ON(host->data);
-
if (data || (cmd->flags & MMC_RSP_BUSY))
sdhci_set_timeout(host, cmd);
if (!data)
return;
+ WARN_ON(host->data);
+
/* Sanity checks */
BUG_ON(data->blksz * data->blocks > 524288);
BUG_ON(data->blksz > host->mmc->max_blk_size);
@@ -930,7 +930,9 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
WARN_ON(!host->data);
mode = SDHCI_TRNS_BLK_CNT_EN;
- if (mmc_op_multi(cmd->opcode) || data->blocks > 1) {
+ if (mmc_op_cmdq_execute_task(cmd->opcode) && (data->blocks > 1))
+ mode |= SDHCI_TRNS_MULTI;
+ else if (mmc_op_multi(cmd->opcode) || (data->blocks > 1)) {
mode |= SDHCI_TRNS_MULTI;
/*
* If we are sending CMD23, CMD12 never gets sent
@@ -1004,8 +1006,12 @@ static void sdhci_finish_data(struct sdhci_host *host)
}
sdhci_send_command(host, data->stop);
- } else
- tasklet_schedule(&host->finish_tasklet);
+ } else {
+ if (host->mmc->context_info.is_cmdq_busy)
+ tasklet_schedule(&host->finish_async_data_tasklet);
+ else
+ tasklet_schedule(&host->finish_tasklet);
+ }
}
void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
@@ -1084,6 +1090,12 @@ void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200)
flags |= SDHCI_CMD_DATA;
+ /* CMD46/47 doesn't wait for data */
+ if (mmc_op_cmdq_execute_task(cmd->opcode)) {
+ cmd->data = NULL;
+ host->mrq->data = NULL;
+ }
+
sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
}
EXPORT_SYMBOL_GPL(sdhci_send_command);
@@ -1116,6 +1128,9 @@ static void sdhci_finish_command(struct sdhci_host *host)
if (host->cmd == host->mrq->precmd) {
host->cmd = NULL;
sdhci_send_command(host, host->mrq->cmd);
+ } else if ((host->cmd == host->mrq->cmd) && host->mrq->cmd2) {
+ host->cmd = NULL;
+ sdhci_send_command(host, host->mrq->cmd2);
} else {
/* Processed actual command. */
@@ -1409,6 +1424,9 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
!(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ)) &&
(present_state & SDHCI_DATA_0_LVL_MASK)) {
if (mmc->card) {
+ /* don't do tuning when cmdq is not empty */
+ if (mmc->context_info.is_cmdq_busy)
+ goto end_tuning;
/* eMMC uses cmd21 but sd and sdio use cmd19 */
tuning_opcode =
mmc->card->type == MMC_TYPE_MMC ?
@@ -1430,9 +1448,17 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
}
}
- if (mrq->precmd && !(host->flags & SDHCI_AUTO_CMD23))
- sdhci_send_command(host, mrq->precmd);
- else
+end_tuning:
+
+ if (mrq->precmd) {
+ if (mrq->precmd->opcode == 23) {
+ if (!(host->flags & SDHCI_AUTO_CMD23))
+ sdhci_send_command(host, mrq->precmd);
+ else
+ sdhci_send_command(host, mrq->cmd);
+ } else
+ sdhci_send_command(host, mrq->precmd);
+ } else
sdhci_send_command(host, mrq->cmd);
}
@@ -2155,7 +2181,7 @@ static const struct mmc_host_ops sdhci_ops = {
* *
\*****************************************************************************/
-static void sdhci_tasklet_finish(unsigned long param)
+static void sdhci_tasklet_finish_async_data(unsigned long param)
{
struct sdhci_host *host;
unsigned long flags;
@@ -2169,15 +2195,71 @@ static void sdhci_tasklet_finish(unsigned long param)
* If this tasklet gets rescheduled while running, it will
* be run again afterwards but without any active request.
*/
- if (!host->mrq) {
+ if (!host->mmc->areq || !host->mmc->areq->mrq->data) {
spin_unlock_irqrestore(&host->lock, flags);
return;
}
del_timer(&host->timer);
+ mrq = host->mmc->areq->mrq;
+
+ /*
+ * The controller needs a reset of internal state machines
+ * upon error conditions.
+ */
+ if (!(host->flags & SDHCI_DEVICE_DEAD) &&
+ ((mrq->data && mrq->data->error) ||
+ (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
+
+ /* Some controllers need this kick or reset won't work here */
+ if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)
+ /* This is to force an update */
+ host->ops->set_clock(host, host->clock);
+
+ sdhci_reset(host, SDHCI_RESET_DATA);
+ }
+
+ host->data = NULL;
+
+#ifndef SDHCI_USE_LEDS_CLASS
+ sdhci_deactivate_led(host);
+#endif
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ mmc_request_done(host->mmc, mrq);
+
+ sdhci_runtime_pm_put(host);
+}
+
+static void sdhci_tasklet_finish(unsigned long param)
+{
+ struct sdhci_host *host;
+ unsigned long flags;
+ struct mmc_request *mrq;
+ int opcode;
+
+ host = (struct sdhci_host *)param;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ /*
+ * If this tasklet gets rescheduled while running, it will
+ * be run again afterwards but without any active request.
+ */
+ if (!host->mrq) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ return;
+ }
+
mrq = host->mrq;
+ BUG_ON(!mrq->cmd);
+ opcode = mrq->cmd->opcode;
+ /* for CMD46/47, doesn't delete timer */
+ if (!mmc_op_cmdq_execute_task(opcode))
+ del_timer(&host->timer);
/*
* The controller needs a reset of internal state machines
* upon error conditions.
@@ -2202,17 +2284,25 @@ static void sdhci_tasklet_finish(unsigned long param)
host->mrq = NULL;
host->cmd = NULL;
- host->data = NULL;
+ /* CMD46/47 sill have pending data */
+ if (!mmc_op_cmdq_execute_task(opcode)) {
#ifndef SDHCI_USE_LEDS_CLASS
- sdhci_deactivate_led(host);
+ sdhci_deactivate_led(host);
#endif
+ }
mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
mmc_request_done(host->mmc, mrq);
- sdhci_runtime_pm_put(host);
+
+ /*
+ * host will be put in D0i3 when pending data is done
+ * for CMD46/47
+ */
+ if (!mmc_op_cmdq_execute_task(opcode))
+ sdhci_runtime_pm_put(host);
}
static void sdhci_timeout_timer(unsigned long data)
@@ -2455,7 +2545,8 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
}
if (intmask & SDHCI_INT_DATA_END) {
- if (host->cmd) {
+ if (!host->mmc->context_info.is_cmdq_busy &&
+ host->cmd) {
/*
* Data managed to finish before the
* command completed. Make sure we do
@@ -3309,6 +3400,8 @@ int sdhci_add_host(struct sdhci_host *host)
*/
tasklet_init(&host->finish_tasklet,
sdhci_tasklet_finish, (unsigned long)host);
+ tasklet_init(&host->finish_async_data_tasklet,
+ sdhci_tasklet_finish_async_data, (unsigned long)host);
setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 375af80..af335d2 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -176,6 +176,7 @@ struct sdhci_host {
unsigned int align_mask; /* ADMA alignment mask */
struct tasklet_struct finish_tasklet; /* Tasklet structures */
+ struct tasklet_struct finish_async_data_tasklet;
struct timer_list timer; /* Timer for timeouts */
--
1.7.10.4
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