diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0009-AST2600-Disable-DMA-arbitration-options-on-MAC1-and-.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0009-AST2600-Disable-DMA-arbitration-options-on-MAC1-and-.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0009-AST2600-Disable-DMA-arbitration-options-on-MAC1-and-.patch b/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0009-AST2600-Disable-DMA-arbitration-options-on-MAC1-and-.patch new file mode 100644 index 000000000..6196551a2 --- /dev/null +++ b/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0009-AST2600-Disable-DMA-arbitration-options-on-MAC1-and-.patch @@ -0,0 +1,57 @@ +From 970a7c3b21e7264bb6ada434652795b5ce947ac7 Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +Date: Tue, 31 Mar 2020 13:28:31 -0700 +Subject: [PATCH] AST2600: Disable DMA arbitration options on MAC1 and MAC2 + +Aspeed added 2 new options to DMA arbitration in AST2600A1 MAC1 +and MAC2 but it has a bug in A1 so it might cause the MAC hang if +we enable these 2 new options. +Option 1: Round Robin, register MAC58[27] +Option 2: Tx Valid, register MAC58[28] + +So this commit disables options above. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +--- + arch/arm/mach-aspeed/ast2600/platform.S | 18 ++++++++++++++++++ + 1 file changed, 18 insertions(+) + +diff --git a/arch/arm/mach-aspeed/ast2600/platform.S b/arch/arm/mach-aspeed/ast2600/platform.S +index e479d0276d39..aaacb61a1f8b 100644 +--- a/arch/arm/mach-aspeed/ast2600/platform.S ++++ b/arch/arm/mach-aspeed/ast2600/platform.S +@@ -58,6 +58,12 @@ + #define AST_FMC_WDT1_CTRL_MODE (AST_FMC_BASE + 0x060) + #define AST_FMC_WDT2_CTRL_MODE (AST_FMC_BASE + 0x064) + ++#define AST_MAC1_BASE (0x1E660000) ++#define AST_MAC1_CTRL2 (AST_MAC1_BASE + 0x058) ++ ++#define AST_MAC2_BASE (0x1E680000) ++#define AST_MAC2_CTRL2 (AST_MAC2_BASE + 0x058) ++ + #define AST_GPIO_BASE (0x1E780000) + #define AST_GPIOYZ_DATA_VALUE (AST_GPIO_BASE + 0x1E0) + +@@ -245,6 +251,18 @@ wait_lock: + bne 2f + + 1: ++ /* disable DMA arbitration on MAC1 (A1 bug) */ ++ ldr r0, =AST_MAC1_CTRL2 ++ ldr r1, [r0] ++ orr r1, #0x18000000 ++ str r1, [r0] ++ ++ /* disable DMA arbitration on MAC2 (A1 bug) */ ++ ldr r0, =AST_MAC2_CTRL2 ++ ldr r1, [r0] ++ orr r1, #0x18000000 ++ str r1, [r0] ++ + /* LPC/eSPI mode selection by SW (AST2600/AST2620 A1 only) */ + ldr r0, =AST_GPIOYZ_DATA_VALUE + ldr r0, [r0] +-- +2.17.1 + |