-----Original Message----- From: york sun Sent: Friday, December 02, 2016 1:24 AM To: Mingkai Hu mingkai.hu@nxp.com Cc: Chris Packham judge.packham@gmail.com; Tony O'Brien tony.obrien@alliedtelesis.co.nz; u-boot u-boot@lists.denx.de Subject: Re: [U-Boot] [PATCH] mpc85xx: pci: Implement workaround for Erratum A007815
On 11/30/2016 11:51 PM, Chris Packham wrote:
(adding York)
On Thu, Dec 1, 2016 at 4:20 PM, Tony O'Brien tony.obrien@alliedtelesis.co.nz wrote:
The read-only-write-enable bit is set by default and must be cleared to prevent overwriting read-only registers. This should be done immediately after resetting the PCI Express controller.
Reviewed-by: Hamish Martin hamish.martin@alliedtelesis.co.nz
Note that this does not implement the whole fix for this erratum, just what is necessary for our implementation. Since we are using a fixed RC configuration, no support has been added for EP mode or any consideration of link-up/down events.
Signed-off-by: Tony O'Brien tony.obrien@alliedtelesis.co.nz
arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 +++ arch/powerpc/include/asm/config_mpc85xx.h | 1 + arch/powerpc/include/asm/fsl_pci.h | 4 +++- drivers/pci/fsl_pci_init.c | 7 +++++++ 4 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 402a1ff..aabb56b 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -330,6 +330,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #ifdef CONFIG_SYS_FSL_ERRATUM_A009663 puts("Work-around for Erratum A009663 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A007815
puts("Work-around for Erratum A007815 enabled\n"); #endif return 0;} diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h index c92bc1e..c298e44 100644 --- a/arch/powerpc/include/asm/config_mpc85xx.h +++ b/arch/powerpc/include/asm/config_mpc85xx.h @@ -785,6 +785,7 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013) #define
CONFIG_SYS_FSL_ERRATUM_A006593
#define CONFIG_SYS_FSL_ERRATUM_A007186 #define CONFIG_SYS_FSL_ERRATUM_A006379 +#define CONFIG_SYS_FSL_ERRATUM_A007815 #define ESDHCI_QUIRK_BROKEN_TIMEOUT_VALUE #define CONFIG_SYS_FSL_SFP_VER_3_0
Tony,
The signed-off signature should be above the --- line.
Mingkai,
Please review this implementation. This erratum applies to T4240, T2080, LS1021A.
Hi York and Tony,
Sorry for delayed response.
I think it's better to add the errata implementation for the layerscape platform also.
The layerscape driver code is drivers/pci/pcie_layerscape.c. We can help to test the patch on the layerscape platform if Tony don't have the platform.
There is no link-up/down events used under u-boot, we can leave it out.
Thanks, Mingkai