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powerpc/P1010: Add workaround for erratum P1010-A003549 (related to IFC)

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Issue:
Peripheral connected to IFC_CS3 may hamper booting from IFC.

Impact:
Boot from IFC may not be successful if IFC_CS3 is used.

Workaround:
If IFC_CS3 is used, gate IFC_CS3 while booting from NAND or NOR.
Also Software should select IFC_CS3 using PMUXCR[26:27] = 0x01.

Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Poonam Aggrwal 2011-06-29 16:32:52 +05:30 committed by Kumar Gala
parent 42aee64bd9
commit fb855f43a1
3 changed files with 17 additions and 0 deletions
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3
arch/powerpc/cpu/mpc85xx/cmd_errata.c
View File

@ -89,6 +89,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_IFC_A002769
puts("Work-around for Erratum IFC-A002769 enabled\n");
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549
puts("Work-around for Erratum P1010-A003549 enabled\n");
#endif
return 0;
}

12
arch/powerpc/cpu/mpc85xx/cpu_init_early.c
View File

@ -30,6 +30,9 @@ void cpu_init_early_f(void)
{
u32 mas0, mas1, mas2, mas3, mas7;
int i;
#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549
ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
#endif
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
@ -49,6 +52,15 @@ void cpu_init_early_f(void)
write_tlb(mas0, mas1, mas2, mas3, mas7);
/*
* Work Around for IFC Erratum A-003549. This issue is P1010
* specific. LCLK(a free running clk signal) is muxed with IFC_CS3 on P1010 SOC
* Hence specifically selecting CS3.
*/
#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549
setbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_LCLK_IFC_CS3);
#endif
init_laws();
invalidate_tlb(1);
init_tlbs();

2
arch/powerpc/include/asm/config_mpc85xx.h
View File

@ -113,6 +113,7 @@
#define CONFIG_SYS_FSL_PCIE_COMPAT "fsl,qoriq-pcie-v2.2"
#define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
#define CONFIG_SYS_FSL_ERRATUM_IFC_A002769
#define CONFIG_SYS_FSL_ERRATUM_P1010_A003549
/* P1011 is single core version of P1020 */
#elif defined(CONFIG_P1011)
@ -162,6 +163,7 @@
#define CONFIG_SYS_CCSRBAR_DEFAULT 0xff700000
#define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
#define CONFIG_SYS_FSL_ERRATUM_IFC_A002769
#define CONFIG_SYS_FSL_ERRATUM_P1010_A003549
/* P1015 is single core version of P1024 */
#elif defined(CONFIG_P1015)