From d621da0066dff92a76ca3c6fb031a7f823a811f3 Mon Sep 17 00:00:00 2001 From: Jerry Huang Date: Thu, 6 Jan 2011 23:42:19 -0600 Subject: [PATCH] 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 Signed-off-by: Roy Zang Signed-off-by: Kumar Gala --- arch/powerpc/cpu/mpc85xx/cmd_errata.c | 5 ++++- drivers/mmc/fsl_esdhc.c | 10 +++++++++- include/configs/P4080DS.h | 4 +++- 3 files changed, 16 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 2d32532..0c4820c 100644 --- 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 --- 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(®s->irqstat, -1); sync(); diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h index 21b48e9..705b226 100644 --- 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 -- 2.7.4