From 3b4456ec391877a950dd5e98ee20df6560f0e1af Mon Sep 17 00:00:00 2001 From: Roy Zang Date: Fri, 7 Jan 2011 00:06:47 -0600 Subject: [PATCH] fsl_esdhc: Add the workaround for erratum ESDHC135 (enable on P4080) The default value of the SRS, VS18 and VS30 and ADMAS fields in the host controller capabilities register (HOSTCAPBLT) are incorrect. The default of these bits should be zero instead of one. Clear these bits out when we read HOSTCAPBLT. Signed-off-by: Roy Zang Signed-off-by: Kumar Gala --- arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 +++ drivers/mmc/fsl_esdhc.c | 5 +++++ include/configs/P4080DS.h | 1 + 3 files changed, 9 insertions(+) diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 0c4820c089..d5c34c867f 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -52,6 +52,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #endif #if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC111) puts("Work-around for Erratum ESDHC111 enabled\n"); +#endif +#if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC135) + puts("Work-around for Erratum ESDHC135 enabled\n"); #endif return 0; } diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index fe94164b0d..d01c926c45 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -472,6 +472,11 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) voltage_caps = 0; caps = regs->hostcapblt; + +#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135 + caps = caps & ~(ESDHC_HOSTCAPBLT_SRS | + ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30); +#endif if (caps & ESDHC_HOSTCAPBLT_VS18) voltage_caps |= MMC_VDD_165_195; if (caps & ESDHC_HOSTCAPBLT_VS30) diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h index 705b22601b..a15dd761b8 100644 --- a/include/configs/P4080DS.h +++ b/include/configs/P4080DS.h @@ -36,6 +36,7 @@ #define CONFIG_ICS307_REFCLK_HZ 33333000 /* ICS307 ref clk freq */ #define CONFIG_SYS_FSL_ERRATUM_ESDHC111 +#define CONFIG_SYS_FSL_ERRATUM_ESDHC135 #define CONFIG_SYS_P4080_ERRATUM_CPU22 #define CONFIG_SYS_P4080_ERRATUM_SERDES8 -- 2.30.2