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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>
This commit is contained in:
Jerry Huang 2011-01-06 23:42:19 -06:00 committed by Kumar Gala
parent 28a096e7f2
commit d621da0066
3 changed files with 16 additions and 3 deletions
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5
arch/powerpc/cpu/mpc85xx/cmd_errata.c
View File

@ -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.
@ -49,6 +49,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#endif
#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;
}

10
drivers/mmc/fsl_esdhc.c
View File

@ -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();

4
include/configs/P4080DS.h
View File

@ -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