@@ -15,13 +15,41 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/clk.h>
+#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 "sdhci.h"
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
+/* Abort type definition in the command register */
+#define SDHCI_CMD_ABORTCMD 0xC0
+/* VENDOR SPEC register */
+#define SDHCI_VENDOR_SPEC 0xC0
+
+/*
+ * 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 one 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 IMX_MULTIBLK_NO_INT (1 << 0)
+
+struct pltfm_imx_data {
+ int flags;
+ u32 mod_val;
+};
+
+static struct sdhci_ops sdhci_esdhc_ops;
+
static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
{
void __iomem *base = host->ioaddr + (reg & ~0x3);
@@ -38,20 +66,51 @@ static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
return readw(host->ioaddr + reg);
}
+static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
+{
+ switch (reg) {
+ case SDHCI_INT_STATUS:
+ if (val & SDHCI_INT_DATA_END) {
+ u32 v;
+ v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
+ if (v & 0x2) {
+ v &= ~0x2;
+ writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
+ }
+ }
+ break;
+ }
+ writel(val, host->ioaddr + reg);
+}
+
static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct pltfm_imx_data *imx_data =
+ (struct pltfm_imx_data *)pltfm_host->priv;
switch (reg) {
case SDHCI_TRANSFER_MODE:
+ if ((host->cmd->opcode == SD_IO_RW_EXTENDED)
+ && (host->cmd->data->blocks > 1)
+ && (host->cmd->data->flags & MMC_DATA_READ)
+ && (imx_data->flags & IMX_MULTIBLK_NO_INT)) {
+ u32 v;
+ v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
+ v |= 0x2;
+ writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
+ }
/*
* Postpone this write, we must do it together with a
* command write that is down below.
*/
- pltfm_host->scratchpad = val;
+ imx_data->mod_val = val;
return;
case SDHCI_COMMAND:
- writel(val << 16 | pltfm_host->scratchpad,
+ if ((host->cmd->opcode == MMC_STOP_TRANSMISSION)
+ && (imx_data->flags & IMX_MULTIBLK_NO_INT))
+ val |= SDHCI_CMD_ABORTCMD;
+ writel(val << 16 | imx_data->mod_val,
host->ioaddr + SDHCI_TRANSFER_MODE);
return;
case SDHCI_BLOCK_SIZE:
@@ -104,6 +163,10 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct clk *clk;
+ struct pltfm_imx_data *imx_data;
+
+ imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
+ pltfm_host->priv = (void *)imx_data;
clk = clk_get(mmc_dev(host->mmc), NULL);
if (IS_ERR(clk)) {
@@ -113,22 +176,30 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
clk_enable(clk);
pltfm_host->clk = clk;
- if (cpu_is_mx35() || cpu_is_mx51())
+ if (!cpu_is_mx25())
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
/* Fix errata ENGcm07207 which is present on i.MX25 and i.MX35 */
if (cpu_is_mx25() || cpu_is_mx35())
host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK;
+ if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51())) {
+ imx_data->flags |= IMX_MULTIBLK_NO_INT;
+ sdhci_esdhc_ops.write_l = esdhc_writel_le;
+ }
+
return 0;
}
static void esdhc_pltfm_exit(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct pltfm_imx_data *imx_data =
+ (struct pltfm_imx_data *)pltfm_host->priv;
clk_disable(pltfm_host->clk);
clk_put(pltfm_host->clk);
+ kfree(imx_data);
}
static struct sdhci_ops sdhci_esdhc_ops = {
@@ -17,7 +17,7 @@
struct sdhci_pltfm_host {
struct clk *clk;
- u32 scratchpad; /* to handle quirks across io-accessor calls */
+ void *priv; /* to handle quirks across io-accessor calls */
};
extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata;