struct mmc_data *data;
struct dw_mci_slot *slot = mmc_priv(mmc);
struct dw_mci *host = slot->host;
- const struct dw_mci_drv_data *drv_data = slot->host->drv_data;
u32 cmdr;
cmd->error = -EINPROGRESS;
data = cmd->data;
if (data) {
cmdr |= SDMMC_CMD_DAT_EXP;
- if (data->flags & MMC_DATA_STREAM)
- cmdr |= SDMMC_CMD_STRM_MODE;
if (data->flags & MMC_DATA_WRITE)
cmdr |= SDMMC_CMD_DAT_WR;
}
- if (drv_data && drv_data->prepare_command)
- drv_data->prepare_command(slot->host, &cmdr);
+ if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &slot->flags))
+ cmdr |= SDMMC_CMD_USE_HOLD_REG;
return cmdr;
}
{
int present;
struct dw_mci_slot *slot = mmc_priv(mmc);
- struct dw_mci_board *brd = slot->host->pdata;
struct dw_mci *host = slot->host;
int gpio_cd = mmc_gpio_get_cd(mmc);
/* Use platform get_cd function, else try onboard card detect */
- if ((brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION) ||
+ if ((mmc->caps & MMC_CAP_NEEDS_POLL) ||
(mmc->caps & MMC_CAP_NONREMOVABLE))
present = 1;
else if (!IS_ERR_VALUE(gpio_cd))
return present;
}
+static void dw_mci_hw_reset(struct mmc_host *mmc)
+{
+ struct dw_mci_slot *slot = mmc_priv(mmc);
+ struct dw_mci *host = slot->host;
+ int reset;
+
+ if (host->use_dma == TRANS_MODE_IDMAC)
+ dw_mci_idmac_reset(host);
+
+ if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET |
+ SDMMC_CTRL_FIFO_RESET))
+ return;
+
+ /*
+ * According to eMMC spec, card reset procedure:
+ * tRstW >= 1us: RST_n pulse width
+ * tRSCA >= 200us: RST_n to Command time
+ * tRSTH >= 1us: RST_n high period
+ */
+ reset = mci_readl(host, RST_N);
+ reset &= ~(SDMMC_RST_HWACTIVE << slot->id);
+ mci_writel(host, RST_N, reset);
+ usleep_range(1, 2);
+ reset |= SDMMC_RST_HWACTIVE << slot->id;
+ mci_writel(host, RST_N, reset);
+ usleep_range(200, 300);
+}
+
static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card)
{
struct dw_mci_slot *slot = mmc_priv(mmc);
.set_ios = dw_mci_set_ios,
.get_ro = dw_mci_get_ro,
.get_cd = dw_mci_get_cd,
+ .hw_reset = dw_mci_hw_reset,
.enable_sdio_irq = dw_mci_enable_sdio_irq,
.execute_tuning = dw_mci_execute_tuning,
.card_busy = dw_mci_card_busy,
}
#ifdef CONFIG_OF
-static struct dw_mci_of_quirks {
- char *quirk;
- int id;
-} of_quirks[] = {
- {
- .quirk = "broken-cd",
- .id = DW_MCI_QUIRK_BROKEN_CARD_DETECTION,
- },
-};
-
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 idx, ret;
+ int ret;
u32 clock_frequency;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
return ERR_PTR(-ENOMEM);
/* find out number of slots supported */
- if (of_property_read_u32(dev->of_node, "num-slots",
- &pdata->num_slots)) {
- dev_info(dev,
- "num-slots property not found, assuming 1 slot is available\n");
- pdata->num_slots = 1;
- }
-
- /* get quirks */
- for (idx = 0; idx < ARRAY_SIZE(of_quirks); idx++)
- if (of_get_property(np, of_quirks[idx].quirk, NULL))
- pdata->quirks |= of_quirks[idx].id;
+ of_property_read_u32(np, "num-slots", &pdata->num_slots);
if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth))
dev_info(dev,
static void dw_mci_enable_cd(struct dw_mci *host)
{
- struct dw_mci_board *brd = host->pdata;
unsigned long irqflags;
u32 temp;
int i;
+ struct dw_mci_slot *slot;
- /* No need for CD if broken card detection */
- if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION)
- return;
-
- /* No need for CD if all slots have a non-error GPIO */
+ /*
+ * 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++) {
- struct dw_mci_slot *slot = host->slot[i];
+ slot = host->slot[i];
+ if (slot->mmc->caps & MMC_CAP_NEEDS_POLL)
+ return;
if (IS_ERR_VALUE(mmc_gpio_get_cd(slot->mmc)))
break;
}
}
- if (host->pdata->num_slots < 1) {
- dev_err(host->dev,
- "Platform data must supply num_slots.\n");
- return -ENODEV;
- }
-
host->biu_clk = devm_clk_get(host->dev, "biu");
if (IS_ERR(host->biu_clk)) {
dev_dbg(host->dev, "biu clock not available\n");
}
/* Reset all blocks */
- if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS))
- return -ENODEV;
+ if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) {
+ ret = -ENODEV;
+ goto err_clk_ciu;
+ }
host->dma_ops = host->pdata->dma_ops;
dw_mci_init_dma(host);
if (host->pdata->num_slots)
host->num_slots = host->pdata->num_slots;
else
- host->num_slots = SDMMC_GET_SLOT_NUM(mci_readl(host, HCON));
+ 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
*/
- mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER |
SDMMC_INT_TXDR | SDMMC_INT_RXDR |
DW_MCI_ERROR_FLAGS);
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