@@ -19,13 +19,31 @@
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdhci-pltfm.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sdio.h>
#include <mach/hardware.h>
#include <mach/esdhc.h>
#include "sdhci.h"
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
+/* VENDOR SPEC register */
+#define SDHCI_VENDOR_SPEC 0xC0
+#define SDHCI_VENDOR_SPEC_SDIO_QUIRK 0x00000002
+
#define ESDHC_FLAG_GPIO_FOR_CD_WP (1 << 0)
+/*
+ * The CMDTYPE of the CMD register (offset 0xE) should be set to
+ * "11" when the STOP CMD12 is issued on imx53 to abort one
+ * open ended multi-blk IO. Otherwise the TC INT wouldn't
+ * be generated.
+ * In exact block transfer, the controller doesn't complete the
+ * operations automatically as required at the end of the
+ * transfer and remains on hold if the abort command is not sent.
+ * As a result, the TC flag is not asserted and SW received timeout
+ * exeception. Bit1 of Vendor Spec registor is used to fix it.
+ */
+#define ESDHC_FLAG_MULTIBLK_NO_INT (1 << 1)
struct pltfm_imx_data {
int flags;
@@ -80,6 +98,15 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
*/
val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
+ if (unlikely((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
+ && (reg == SDHCI_INT_STATUS)
+ && (val & SDHCI_INT_DATA_END))) {
+ u32 v;
+ v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
+ v &= ~SDHCI_VENDOR_SPEC_SDIO_QUIRK;
+ writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
+ }
+
writel(val, host->ioaddr + reg);
}
@@ -103,9 +130,21 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
* Postpone this write, we must do it together with a
* command write that is down below.
*/
+ if ((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
+ && (host->cmd->opcode == SD_IO_RW_EXTENDED)
+ && (host->cmd->data->blocks > 1)
+ && (host->cmd->data->flags & MMC_DATA_READ)) {
+ u32 v;
+ v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
+ v |= SDHCI_VENDOR_SPEC_SDIO_QUIRK;
+ writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
+ }
imx_data->scratchpad = val;
return;
case SDHCI_COMMAND:
+ if ((host->cmd->opcode == MMC_STOP_TRANSMISSION)
+ && (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
+ val |= SDHCI_CMD_ABORTCMD;
writel(val << 16 | imx_data->scratchpad,
host->ioaddr + SDHCI_TRANSFER_MODE);
return;
@@ -213,6 +252,9 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
}
+ if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
+ imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
+
if (boarddata) {
err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
if (err) {