fsl_esdhc: Add the workaround for erratum ESDHC111 (enable on P4080)

Do not issue a manual asynchronous CMD12. Instead, use a (software)
synchronous CMD12 or AUTOCMD12 to abort data transfer.

Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index 2d32532..0c4820c 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010 Freescale Semiconductor, Inc.
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -50,6 +50,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #if defined(CONFIG_SYS_FSL_ERRATUM_DDR_MSYNC_IN)
        puts("Work-around for DDR MSYNC_IN Erratum enabled\n");
 #endif
+#if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC111)
+       puts("Work-around for Erratum ESDHC111 enabled\n");
+#endif
        return 0;
 }
 

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index cef2859..fe94164 100644 (file)
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2007,2010 Freescale Semiconductor, Inc
+ * Copyright 2007, 2010-2011 Freescale Semiconductor, Inc
  * Andy Fleming
  *
  * Based vaguely on the pxa mmc code:
@@ -79,6 +79,9 @@ uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
                if (data->blocks > 1) {
                        xfertyp |= XFERTYP_MSBSEL;
                        xfertyp |= XFERTYP_BCEN;
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
+                       xfertyp |= XFERTYP_AC12EN;
+#endif
                }
 
                if (data->flags & MMC_DATA_READ)
@@ -234,6 +237,11 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
        struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
        volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC111
+       if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
+               return 0;
+#endif
+
        esdhc_write32(&regs->irqstat, -1);
 
        sync();

diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h
index 21b48e9..705b226 100644 (file)
--- a/include/configs/P4080DS.h
+++ b/include/configs/P4080DS.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2010 Freescale Semiconductor, Inc.
+ * Copyright 2009-2011 Freescale Semiconductor, Inc.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -35,6 +35,8 @@
 
 #define CONFIG_ICS307_REFCLK_HZ                33333000  /* ICS307 ref clk freq */
 
+#define CONFIG_SYS_FSL_ERRATUM_ESDHC111
+
 #define CONFIG_SYS_P4080_ERRATUM_CPU22
 #define CONFIG_SYS_P4080_ERRATUM_SERDES8