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authorJaehoon Chung <jh80.chung@samsung.com>2017-06-05 07:41:31 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2017-06-29 18:14:09 +0300
commit58870241a67453be7dc9ab368d5a0cdc9c404616 (patch)
tree272982c33350a5d04e2923a5b86a5ddb7f7bcd5f /drivers/mmc
parentd30a8f7bdf6498e47bd3a6f31e5028f239deb208 (diff)
downloadlinux-58870241a67453be7dc9ab368d5a0cdc9c404616.tar.xz
mmc: dw_mmc: remove the loop about finding slots
dwmmc controller has used the only one slot. It doesn't need to check the other slots. Remove the loop about finding slots. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/dw_mmc.c115
1 files changed, 36 insertions, 79 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 97fab9bb3db8..1b415da82754 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2563,26 +2563,21 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status)
static void dw_mci_handle_cd(struct dw_mci *host)
{
- int i;
-
- for (i = 0; i < host->num_slots; i++) {
- struct dw_mci_slot *slot = host->slot[i];
-
- if (!slot)
- continue;
+ int i = 0;
+ struct dw_mci_slot *slot = host->slot[i];
- if (slot->mmc->ops->card_event)
- slot->mmc->ops->card_event(slot->mmc);
- mmc_detect_change(slot->mmc,
- msecs_to_jiffies(host->pdata->detect_delay_ms));
- }
+ if (slot->mmc->ops->card_event)
+ slot->mmc->ops->card_event(slot->mmc);
+ mmc_detect_change(slot->mmc,
+ msecs_to_jiffies(host->pdata->detect_delay_ms));
}
static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
{
struct dw_mci *host = dev_id;
u32 pending;
- int i;
+ int i = 0;
+ struct dw_mci_slot *slot = host->slot[i];
pending = mci_readl(host, MINTSTS); /* read-only mask reg */
@@ -2659,19 +2654,11 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
dw_mci_handle_cd(host);
}
- /* Handle SDIO Interrupts */
- for (i = 0; i < host->num_slots; i++) {
- struct dw_mci_slot *slot = host->slot[i];
-
- if (!slot)
- continue;
-
- if (pending & SDMMC_INT_SDIO(slot->sdio_id)) {
- mci_writel(host, RINTSTS,
- SDMMC_INT_SDIO(slot->sdio_id));
- __dw_mci_enable_sdio_irq(slot, 0);
- sdio_signal_irq(slot->mmc);
- }
+ if (pending & SDMMC_INT_SDIO(slot->sdio_id)) {
+ mci_writel(host, RINTSTS,
+ SDMMC_INT_SDIO(slot->sdio_id));
+ __dw_mci_enable_sdio_irq(slot, 0);
+ sdio_signal_irq(slot->mmc);
}
}
@@ -3011,29 +2998,24 @@ static void dw_mci_enable_cd(struct dw_mci *host)
{
unsigned long irqflags;
u32 temp;
- int i;
+ int i = 0;
struct dw_mci_slot *slot;
/*
* No need for CD if all slots have a non-error GPIO
* as well as broken card detection is found.
*/
- for (i = 0; i < host->num_slots; i++) {
- slot = host->slot[i];
- if (slot->mmc->caps & MMC_CAP_NEEDS_POLL)
- return;
-
- if (mmc_gpio_get_cd(slot->mmc) < 0)
- break;
- }
- if (i == host->num_slots)
+ slot = host->slot[i];
+ if (slot->mmc->caps & MMC_CAP_NEEDS_POLL)
return;
- spin_lock_irqsave(&host->irq_lock, irqflags);
- temp = mci_readl(host, INTMASK);
- temp |= SDMMC_INT_CD;
- mci_writel(host, INTMASK, temp);
- spin_unlock_irqrestore(&host->irq_lock, irqflags);
+ if (mmc_gpio_get_cd(slot->mmc) < 0) {
+ spin_lock_irqsave(&host->irq_lock, irqflags);
+ temp = mci_readl(host, INTMASK);
+ temp |= SDMMC_INT_CD;
+ mci_writel(host, INTMASK, temp);
+ spin_unlock_irqrestore(&host->irq_lock, irqflags);
+ }
}
int dw_mci_probe(struct dw_mci *host)
@@ -3041,7 +3023,6 @@ int dw_mci_probe(struct dw_mci *host)
const struct dw_mci_drv_data *drv_data = host->drv_data;
int width, i, ret = 0;
u32 fifo_size;
- int init_slots = 0;
if (!host->pdata) {
host->pdata = dw_mci_parse_dt(host);
@@ -3205,13 +3186,6 @@ int dw_mci_probe(struct dw_mci *host)
goto err_dmaunmap;
/*
- * Even though dwmmc IP is provided the multiple slots,
- * there is no use case in mmc subsystem.
- * dwmmc host controller needs to initialize the one slot per an IP.
- */
- host->num_slots = 1;
-
- /*
* Enable interrupts for command done, data over, data empty,
* receive ready and error such as transmit, receive timeout, crc error
*/
@@ -3226,20 +3200,9 @@ int dw_mci_probe(struct dw_mci *host)
host->irq, width, fifo_size);
/* We need at least one slot to succeed */
- for (i = 0; i < host->num_slots; i++) {
- ret = dw_mci_init_slot(host, i);
- if (ret)
- dev_dbg(host->dev, "slot %d init failed\n", i);
- else
- init_slots++;
- }
-
- if (init_slots) {
- dev_info(host->dev, "%d slots initialized\n", init_slots);
- } else {
- dev_dbg(host->dev,
- "attempted to initialize %d slots, but failed on all\n",
- host->num_slots);
+ ret = dw_mci_init_slot(host, 0);
+ if (ret) {
+ dev_dbg(host->dev, "slot %d init failed\n", i);
goto err_dmaunmap;
}
@@ -3267,13 +3230,11 @@ EXPORT_SYMBOL(dw_mci_probe);
void dw_mci_remove(struct dw_mci *host)
{
- int i;
+ int i = 0;
- for (i = 0; i < host->num_slots; i++) {
- dev_dbg(host->dev, "remove slot %d\n", i);
- if (host->slot[i])
- dw_mci_cleanup_slot(host->slot[i], i);
- }
+ dev_dbg(host->dev, "remove slot %d\n", i);
+ if (host->slot[i])
+ dw_mci_cleanup_slot(host->slot[i], i);
mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
@@ -3316,8 +3277,9 @@ EXPORT_SYMBOL(dw_mci_runtime_suspend);
int dw_mci_runtime_resume(struct device *dev)
{
- int i, ret = 0;
+ int i = 0, ret = 0;
struct dw_mci *host = dev_get_drvdata(dev);
+ struct dw_mci_slot *slot = host->slot[i];
if (host->cur_slot &&
(mmc_can_gpio_cd(host->cur_slot->mmc) ||
@@ -3356,17 +3318,12 @@ int dw_mci_runtime_resume(struct device *dev)
DW_MCI_ERROR_FLAGS);
mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE);
- for (i = 0; i < host->num_slots; i++) {
- struct dw_mci_slot *slot = host->slot[i];
- if (!slot)
- continue;
- if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
- dw_mci_set_ios(slot->mmc, &slot->mmc->ios);
+ if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
+ dw_mci_set_ios(slot->mmc, &slot->mmc->ios);
- /* Force setup bus to guarantee available clock output */
- dw_mci_setup_bus(slot, true);
- }
+ /* Force setup bus to guarantee available clock output */
+ dw_mci_setup_bus(slot, true);
/* Now that slots are all setup, we can enable card detect */
dw_mci_enable_cd(host);