X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Fmmc%2Ffsl_esdhc.c;h=e93e38ac4346fdebe203621aa5eac95e9355e660;hb=6acc7c3cbc05873d62118640cf964e9c9665804c;hp=a2f35e3e99159dc0481737a0bb4d1f1e55fc0da6;hpb=670c24f6f32c8320cbb950e19e75fa8cdc8af88c;p=platform%2Fkernel%2Fu-boot.git

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index a2f35e3..e93e38a 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -68,7 +68,7 @@ struct fsl_esdhc {
 };
 
 /* Return the XFERTYP flags for a given command and data packet */
-uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
+static uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
 {
 	uint xfertyp = 0;
 
@@ -190,6 +190,10 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
 		esdhc_clrsetbits32(&regs->wml, WML_RD_WML_MASK, wml_value);
 		esdhc_write32(&regs->dsaddr, (u32)data->dest);
 	} else {
+		flush_dcache_range((ulong)data->src,
+				   (ulong)data->src+data->blocks
+					 *data->blocksize);
+
 		if (wml_value > WML_WR_WML_MAX)
 			wml_value = WML_WR_WML_MAX_VAL;
 		if ((esdhc_read32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
@@ -249,7 +253,15 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
 	return 0;
 }
 
-
+static void check_and_invalidate_dcache_range
+	(struct mmc_cmd *cmd,
+	 struct mmc_data *data) {
+	unsigned start = (unsigned)data->dest ;
+	unsigned size = roundup(ARCH_DMA_MINALIGN,
+				data->blocks*data->blocksize);
+	unsigned end = start+size ;
+	invalidate_dcache_range(start, end);
+}
 /*
  * Sends a command out on the bus.  Takes the mmc pointer,
  * a command pointer, and an optional data pointer.
@@ -307,19 +319,59 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 #else
 	esdhc_write32(&regs->xfertyp, xfertyp);
 #endif
+
+	/* Mask all irqs */
+	esdhc_write32(&regs->irqsigen, 0);
+
 	/* Wait for the command to complete */
-	while (!(esdhc_read32(&regs->irqstat) & IRQSTAT_CC))
+	while (!(esdhc_read32(&regs->irqstat) & (IRQSTAT_CC | IRQSTAT_CTOE)))
 		;
 
+	if (data && (data->flags & MMC_DATA_READ))
+		check_and_invalidate_dcache_range(cmd, data);
+
 	irqstat = esdhc_read32(&regs->irqstat);
 	esdhc_write32(&regs->irqstat, irqstat);
 
+	/* Reset CMD and DATA portions on error */
+	if (irqstat & (CMD_ERR | IRQSTAT_CTOE)) {
+		esdhc_write32(&regs->sysctl, esdhc_read32(&regs->sysctl) |
+			      SYSCTL_RSTC);
+		while (esdhc_read32(&regs->sysctl) & SYSCTL_RSTC)
+			;
+
+		if (data) {
+			esdhc_write32(&regs->sysctl,
+				      esdhc_read32(&regs->sysctl) |
+				      SYSCTL_RSTD);
+			while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTD))
+				;
+		}
+	}
+
 	if (irqstat & CMD_ERR)
 		return COMM_ERR;
 
 	if (irqstat & IRQSTAT_CTOE)
 		return TIMEOUT;
 
+	/* Workaround for ESDHC errata ENGcm03648 */
+	if (!data && (cmd->resp_type & MMC_RSP_BUSY)) {
+		int timeout = 2500;
+
+		/* Poll on DATA0 line for cmd with busy signal for 250 ms */
+		while (timeout > 0 && !(esdhc_read32(&regs->prsstat) &
+					PRSSTAT_DAT0)) {
+			udelay(100);
+			timeout--;
+		}
+
+		if (timeout <= 0) {
+			printf("Timeout waiting for DAT0 to go high!\n");
+			return TIMEOUT;
+		}
+	}
+
 	/* Copy the response to the response buffer */
 	if (cmd->resp_type & MMC_RSP_136) {
 		u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
@@ -358,12 +410,12 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 	return 0;
 }
 
-void set_sysctl(struct mmc *mmc, uint clock)
+static void set_sysctl(struct mmc *mmc, uint clock)
 {
-	int sdhc_clk = gd->sdhc_clk;
 	int div, pre_div;
 	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
 	volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
+	int sdhc_clk = cfg->sdhc_clk;
 	uint clk;
 
 	if (clock < mmc->f_min)
@@ -427,9 +479,10 @@ static int esdhc_init(struct mmc *mmc)
 	while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA) && --timeout)
 		udelay(1000);
 
+#ifndef ARCH_MXC
 	/* Enable cache snooping */
-	if (cfg && !cfg->no_snoop)
-		esdhc_write32(&regs->scr, 0x00000040);
+	esdhc_write32(&regs->scr, 0x00000040);
+#endif
 
 	esdhc_write32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
 
@@ -491,6 +544,9 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
 	/* First reset the eSDHC controller */
 	esdhc_reset(regs);
 
+	esdhc_setbits32(&regs->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN
+				| SYSCTL_IPGEN | SYSCTL_CKEN);
+
 	mmc->priv = cfg;
 	mmc->send_cmd = esdhc_send_cmd;
 	mmc->set_ios = esdhc_set_ios;
@@ -542,6 +598,7 @@ int fsl_esdhc_mmc_init(bd_t *bis)
 	cfg = malloc(sizeof(struct fsl_esdhc_cfg));
 	memset(cfg, 0, sizeof(struct fsl_esdhc_cfg));
 	cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
+	cfg->sdhc_clk = gd->sdhc_clk;
 	return fsl_esdhc_initialize(bis, cfg);
 }