@@ -26,8 +26,16 @@ Required Properties:
* bus-width: as documented in mmc core bindings.
* wp-gpios: specifies the write protect gpio line. The format of the
- gpio specifier depends on the gpio controller. If the write-protect
- line is not available, this property is optional.
+ gpio specifier depends on the gpio controller. If a GPIO is not used
+ for write-protect, this property is optional.
+
+ * disable-wp: If the wp-gpios property isn't present then (by default)
+ we'd assume that the write protect is hooked up directly to the
+ controller's special purpose write protect line (accessible via
+ the WRTPRT register). However, it's possible that we simply don't
+ want write protect. In that case specify 'disable-wp'.
+ NOTE: This property is not required for slots known to always
+ connect to eMMC or SDIO cards.
Optional properties:
@@ -74,6 +74,7 @@ struct idmac_desc {
* struct dw_mci_slot - MMC slot state
* @mmc: The mmc_host representing this slot.
* @host: The MMC controller this slot is using.
+ * @quirks: Slot-level quirks (DW_MCI_SLOT_QUIRK_XXX)
* @ctype: Card type for this slot.
* @mrq: mmc_request currently being processed or waiting to be
* processed, or NULL when the slot is idle.
@@ -88,6 +89,8 @@ struct dw_mci_slot {
struct mmc_host *mmc;
struct dw_mci *host;
+ int quirks;
+
u32 ctype;
struct mmc_request *mrq;
@@ -825,7 +828,13 @@ static int dw_mci_get_ro(struct mmc_host *mmc)
struct dw_mci_board *brd = slot->host->pdata;
/* Use platform get_ro function, else try on board write protect */
- if (brd->quirks & DW_MCI_QUIRK_NO_WRITE_PROTECT)
+
+ /*
+ * NOTE: DW_MCI_QUIRK_NO_WRITE_PROTECT will be removed in a future
+ * patch in the series once reference to it is removed.
+ */
+ if ((brd->quirks & DW_MCI_QUIRK_NO_WRITE_PROTECT) ||
+ (slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT))
read_only = 0;
else if (brd->get_ro)
read_only = brd->get_ro(slot->id);
@@ -1785,6 +1794,30 @@ static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot)
return NULL;
}
+static struct dw_mci_of_slot_quirks {
+ char *quirk;
+ int id;
+} of_slot_quirks[] = {
+ {
+ .quirk = "disable-wp",
+ .id = DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT,
+ },
+};
+
+static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot)
+{
+ struct device_node *np = dw_mci_of_find_slot_node(dev, slot);
+ int quirks = 0;
+ int idx;
+
+ /* get quirks */
+ for (idx = 0; idx < ARRAY_SIZE(of_slot_quirks); idx++)
+ if (of_get_property(np, of_slot_quirks[idx].quirk, NULL))
+ quirks |= of_slot_quirks[idx].id;
+
+ return quirks;
+}
+
/* find out bus-width for a given slot */
static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot)
{
@@ -1800,6 +1833,10 @@ static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot)
return bus_wd;
}
#else /* CONFIG_OF */
+static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot)
+{
+ return 0;
+}
static u32 dw_mci_of_get_bus_wd(struct device *dev, u8 slot)
{
return 1;
@@ -1828,6 +1865,8 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
slot->host = host;
host->slot[id] = slot;
+ slot->quirks = dw_mci_of_get_slot_quirks(host->dev, slot->id);
+
mmc->ops = &dw_mci_ops;
mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510);
mmc->f_max = host->bus_hz;
@@ -209,9 +209,18 @@ struct dw_mci_dma_ops {
#define DW_MCI_QUIRK_HIGHSPEED BIT(2)
/* Unreliable card detection */
#define DW_MCI_QUIRK_BROKEN_CARD_DETECTION BIT(3)
+
/* Write Protect detection not available */
+/*
+ * NOTE: DW_MCI_QUIRK_NO_WRITE_PROTECT will be removed in a future
+ * patch in the series once reference to it is removed.
+ */
#define DW_MCI_QUIRK_NO_WRITE_PROTECT BIT(4)
+/* Slot level quirks */
+/* This slot has no write protect */
+#define DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT BIT(0)
+
struct dma_pdata;
struct block_settings {