summaryrefslogtreecommitdiff
path: root/drivers/mmc/host/dw_mmc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc/host/dw_mmc.c')
-rw-r--r--drivers/mmc/host/dw_mmc.c225
1 files changed, 94 insertions, 131 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index e45129f48174..a9dfb26972f2 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -392,7 +392,7 @@ static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd)
cmdr = stop->opcode | SDMMC_CMD_STOP |
SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP;
- if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &host->cur_slot->flags))
+ if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &host->slot->flags))
cmdr |= SDMMC_CMD_USE_HOLD_REG;
return cmdr;
@@ -480,7 +480,7 @@ static void dw_mci_dmac_complete_dma(void *arg)
if ((host->use_dma == TRANS_MODE_EDMAC) &&
data && (data->flags & MMC_DATA_READ))
/* Invalidate cache after read */
- dma_sync_sg_for_cpu(mmc_dev(host->cur_slot->mmc),
+ dma_sync_sg_for_cpu(mmc_dev(host->slot->mmc),
data->sg,
data->sg_len,
DMA_FROM_DEVICE);
@@ -820,7 +820,7 @@ static int dw_mci_edmac_start_dma(struct dw_mci *host,
/* Flush cache before write */
if (host->data->flags & MMC_DATA_WRITE)
- dma_sync_sg_for_device(mmc_dev(host->cur_slot->mmc), sgl,
+ dma_sync_sg_for_device(mmc_dev(host->slot->mmc), sgl,
sg_elems, DMA_TO_DEVICE);
dma_async_issue_pending(host->dms->ch);
@@ -1282,7 +1282,6 @@ static void __dw_mci_start_request(struct dw_mci *host,
mrq = slot->mrq;
- host->cur_slot = slot;
host->mrq = mrq;
host->pending_events = 0;
@@ -1621,16 +1620,10 @@ static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card)
if (card->type == MMC_TYPE_SDIO ||
card->type == MMC_TYPE_SD_COMBO) {
- if (!test_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags)) {
- pm_runtime_get_noresume(mmc->parent);
- set_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags);
- }
+ set_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags);
clk_en_a = clk_en_a_old & ~clken_low_pwr;
} else {
- if (test_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags)) {
- pm_runtime_put_noidle(mmc->parent);
- clear_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags);
- }
+ clear_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags);
clk_en_a = clk_en_a_old | clken_low_pwr;
}
@@ -1642,9 +1635,8 @@ static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card)
}
}
-static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
+static void __dw_mci_enable_sdio_irq(struct dw_mci_slot *slot, int enb)
{
- struct dw_mci_slot *slot = mmc_priv(mmc);
struct dw_mci *host = slot->host;
unsigned long irqflags;
u32 int_mask;
@@ -1662,6 +1654,27 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
spin_unlock_irqrestore(&host->irq_lock, irqflags);
}
+static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
+{
+ struct dw_mci_slot *slot = mmc_priv(mmc);
+ struct dw_mci *host = slot->host;
+
+ __dw_mci_enable_sdio_irq(slot, enb);
+
+ /* Avoid runtime suspending the device when SDIO IRQ is enabled */
+ if (enb)
+ pm_runtime_get_noresume(host->dev);
+ else
+ pm_runtime_put_noidle(host->dev);
+}
+
+static void dw_mci_ack_sdio_irq(struct mmc_host *mmc)
+{
+ struct dw_mci_slot *slot = mmc_priv(mmc);
+
+ __dw_mci_enable_sdio_irq(slot, 1);
+}
+
static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct dw_mci_slot *slot = mmc_priv(mmc);
@@ -1749,7 +1762,7 @@ static bool dw_mci_reset(struct dw_mci *host)
ciu_out:
/* After a CTRL reset we need to have CIU set clock registers */
- mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0);
+ mci_send_cmd(host->slot, SDMMC_CMD_UPD_CLK, 0);
return ret;
}
@@ -1763,6 +1776,7 @@ static const struct mmc_host_ops dw_mci_ops = {
.get_cd = dw_mci_get_cd,
.hw_reset = dw_mci_hw_reset,
.enable_sdio_irq = dw_mci_enable_sdio_irq,
+ .ack_sdio_irq = dw_mci_ack_sdio_irq,
.execute_tuning = dw_mci_execute_tuning,
.card_busy = dw_mci_card_busy,
.start_signal_voltage_switch = dw_mci_switch_voltage,
@@ -1775,11 +1789,11 @@ static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq)
__acquires(&host->lock)
{
struct dw_mci_slot *slot;
- struct mmc_host *prev_mmc = host->cur_slot->mmc;
+ struct mmc_host *prev_mmc = host->slot->mmc;
WARN_ON(host->cmd || host->data);
- host->cur_slot->mrq = NULL;
+ host->slot->mrq = NULL;
host->mrq = NULL;
if (!list_empty(&host->queue)) {
slot = list_entry(host->queue.next,
@@ -1929,7 +1943,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
err = dw_mci_command_complete(host, cmd);
if (cmd == mrq->sbc && !err) {
prev_state = state = STATE_SENDING_CMD;
- __dw_mci_start_request(host, host->cur_slot,
+ __dw_mci_start_request(host, host->slot,
mrq->cmd);
goto unlock;
}
@@ -2548,26 +2562,19 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status)
static void dw_mci_handle_cd(struct dw_mci *host)
{
- int i;
+ struct dw_mci_slot *slot = host->slot;
- for (i = 0; i < host->num_slots; i++) {
- struct dw_mci_slot *slot = host->slot[i];
-
- if (!slot)
- continue;
-
- 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;
+ struct dw_mci_slot *slot = host->slot;
pending = mci_readl(host, MINTSTS); /* read-only mask reg */
@@ -2644,18 +2651,11 @@ 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));
- mmc_signal_sdio_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);
}
}
@@ -2687,7 +2687,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
+static int dw_mci_init_slot(struct dw_mci *host)
{
struct mmc_host *mmc;
struct dw_mci_slot *slot;
@@ -2700,15 +2700,15 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
return -ENOMEM;
slot = mmc_priv(mmc);
- slot->id = id;
- slot->sdio_id = host->sdio_id0 + id;
+ slot->id = 0;
+ slot->sdio_id = host->sdio_id0 + slot->id;
slot->mmc = mmc;
slot->host = host;
- host->slot[id] = slot;
+ host->slot = slot;
mmc->ops = &dw_mci_ops;
- if (of_property_read_u32_array(host->dev->of_node,
- "clock-freq-min-max", freq, 2)) {
+ if (device_property_read_u32_array(host->dev, "clock-freq-min-max",
+ freq, 2)) {
mmc->f_min = DW_MCI_FREQ_MIN;
mmc->f_max = DW_MCI_FREQ_MAX;
} else {
@@ -2755,6 +2755,10 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
if (ret)
goto err_host_allocated;
+ /* Process SDIO IRQs through the sdio_irq_work. */
+ if (mmc->caps & MMC_CAP_SDIO_IRQ)
+ mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
+
/* Useful defaults if platform data is unset. */
if (host->use_dma == TRANS_MODE_IDMAC) {
mmc->max_segs = host->ring_size;
@@ -2796,11 +2800,11 @@ err_host_allocated:
return ret;
}
-static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
+static void dw_mci_cleanup_slot(struct dw_mci_slot *slot)
{
/* Debugfs stuff is cleaned up by mmc core */
mmc_remove_host(slot->mmc);
- slot->host->slot[id] = NULL;
+ slot->host->slot = NULL;
mmc_free_host(slot->mmc);
}
@@ -2808,7 +2812,6 @@ static void dw_mci_init_dma(struct dw_mci *host)
{
int addr_config;
struct device *dev = host->dev;
- struct device_node *np = dev->of_node;
/*
* Check tansfer mode from HCON[17:16]
@@ -2869,8 +2872,9 @@ static void dw_mci_init_dma(struct dw_mci *host)
dev_info(host->dev, "Using internal DMA controller.\n");
} else {
/* TRANS_MODE_EDMAC: check dma bindings again */
- if ((of_property_count_strings(np, "dma-names") < 0) ||
- (!of_find_property(np, "dmas", NULL))) {
+ if ((device_property_read_string_array(dev, "dma-names",
+ NULL, 0) < 0) ||
+ !device_property_present(dev, "dmas")) {
goto no_dma;
}
host->dma_ops = &dw_mci_edmac_ops;
@@ -2937,7 +2941,6 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
{
struct dw_mci_board *pdata;
struct device *dev = host->dev;
- struct device_node *np = dev->of_node;
const struct dw_mci_drv_data *drv_data = host->drv_data;
int ret;
u32 clock_frequency;
@@ -2954,20 +2957,22 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
}
/* find out number of slots supported */
- of_property_read_u32(np, "num-slots", &pdata->num_slots);
+ if (device_property_read_u32(dev, "num-slots", &pdata->num_slots))
+ dev_info(dev, "'num-slots' was deprecated.\n");
- if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth))
+ if (device_property_read_u32(dev, "fifo-depth", &pdata->fifo_depth))
dev_info(dev,
"fifo-depth property not found, using value of FIFOTH register as default\n");
- of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms);
+ device_property_read_u32(dev, "card-detect-delay",
+ &pdata->detect_delay_ms);
- of_property_read_u32(np, "data-addr", &host->data_addr_override);
+ device_property_read_u32(dev, "data-addr", &host->data_addr_override);
- if (of_get_property(np, "fifo-watermark-aligned", NULL))
+ if (device_property_present(dev, "fifo-watermark-aligned"))
host->wm_aligned = true;
- if (!of_property_read_u32(np, "clock-frequency", &clock_frequency))
+ if (!device_property_read_u32(dev, "clock-frequency", &clock_frequency))
pdata->bus_hz = clock_frequency;
if (drv_data && drv_data->parse_dt) {
@@ -2990,29 +2995,21 @@ static void dw_mci_enable_cd(struct dw_mci *host)
{
unsigned long irqflags;
u32 temp;
- int i;
- 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)
+ if (host->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(host->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)
@@ -3020,7 +3017,6 @@ 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);
@@ -3183,19 +3179,6 @@ int dw_mci_probe(struct dw_mci *host)
if (ret)
goto err_dmaunmap;
- if (host->pdata->num_slots)
- host->num_slots = host->pdata->num_slots;
- else
- host->num_slots = 1;
-
- if (host->num_slots < 1 ||
- host->num_slots > SDMMC_GET_SLOT_NUM(mci_readl(host, HCON))) {
- dev_err(host->dev,
- "Platform data must supply correct num_slots.\n");
- ret = -ENODEV;
- goto err_clk_ciu;
- }
-
/*
* Enable interrupts for command done, data over, data empty,
* receive ready and error such as transmit, receive timeout, crc error
@@ -3211,20 +3194,9 @@ 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);
+ if (ret) {
+ dev_dbg(host->dev, "slot %d init failed\n", i);
goto err_dmaunmap;
}
@@ -3252,13 +3224,9 @@ EXPORT_SYMBOL(dw_mci_probe);
void dw_mci_remove(struct dw_mci *host)
{
- int i;
-
- 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\n");
+ if (host->slot)
+ dw_mci_cleanup_slot(host->slot);
mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
@@ -3290,9 +3258,9 @@ int dw_mci_runtime_suspend(struct device *dev)
clk_disable_unprepare(host->ciu_clk);
- if (host->cur_slot &&
- (mmc_can_gpio_cd(host->cur_slot->mmc) ||
- !mmc_card_is_removable(host->cur_slot->mmc)))
+ if (host->slot &&
+ (mmc_can_gpio_cd(host->slot->mmc) ||
+ !mmc_card_is_removable(host->slot->mmc)))
clk_disable_unprepare(host->biu_clk);
return 0;
@@ -3301,12 +3269,12 @@ EXPORT_SYMBOL(dw_mci_runtime_suspend);
int dw_mci_runtime_resume(struct device *dev)
{
- int i, ret = 0;
+ int ret = 0;
struct dw_mci *host = dev_get_drvdata(dev);
- if (host->cur_slot &&
- (mmc_can_gpio_cd(host->cur_slot->mmc) ||
- !mmc_card_is_removable(host->cur_slot->mmc))) {
+ if (host->slot &&
+ (mmc_can_gpio_cd(host->slot->mmc) ||
+ !mmc_card_is_removable(host->slot->mmc))) {
ret = clk_prepare_enable(host->biu_clk);
if (ret)
return ret;
@@ -3341,17 +3309,12 @@ 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 (host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
+ dw_mci_set_ios(host->slot->mmc, &host->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(host->slot, true);
/* Now that slots are all setup, we can enable card detect */
dw_mci_enable_cd(host);
@@ -3359,9 +3322,9 @@ int dw_mci_runtime_resume(struct device *dev)
return 0;
err:
- if (host->cur_slot &&
- (mmc_can_gpio_cd(host->cur_slot->mmc) ||
- !mmc_card_is_removable(host->cur_slot->mmc)))
+ if (host->slot &&
+ (mmc_can_gpio_cd(host->slot->mmc) ||
+ !mmc_card_is_removable(host->slot->mmc)))
clk_disable_unprepare(host->biu_clk);
return ret;