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From 8c2a3f6489c86d8dae57cae03d617de2296774ab Mon Sep 17 00:00:00 2001
From: AppaRao Puli <apparao.puli@linux.intel.com>
Date: Mon, 13 May 2019 23:49:02 +0530
Subject: [PATCH] Enabling uart1&uart2 in u-boot for BIOS messages
Added uart init function in u-boot aspeed code
to enable uart1 and uart2 for BIOS serial messages.
Tested:
Forced BMC to stop in u-boot( using Force Firmware Update
Jumper), AC cycled system for multiple times, booted system
to uefi, checked bios serial logs working fine and accessed
keyboard in uefi without any issues.
Signed-off-by: AppaRao Puli <apparao.puli@linux.intel.com>
---
board/aspeed/ast-g5/ast-g5-intel.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/board/aspeed/ast-g5/ast-g5-intel.c b/board/aspeed/ast-g5/ast-g5-intel.c
index 6ea7f0060c57..5196a1a41299 100644
--- a/board/aspeed/ast-g5/ast-g5-intel.c
+++ b/board/aspeed/ast-g5/ast-g5-intel.c
@@ -509,6 +509,26 @@ void board_pre_abort_autoboot(void)
{
}
+static void uart_init(void)
+{
+ u32 val;
+
+ /* Enable UART1 and UART2 for BIOS messages */
+ val = ast_scu_read(AST_SCU_FUN_PIN_CTRL2);
+
+ /* UART1 */
+ val |= (SCU_FUN_PIN_UART1_NCTS | SCU_FUN_PIN_UART1_NDCD |
+ SCU_FUN_PIN_UART1_NDSR | SCU_FUN_PIN_UART1_NRI |
+ SCU_FUN_PIN_UART1_NDTR | SCU_FUN_PIN_UART1_NRTS |
+ SCU_FUN_PIN_UART1_TXD | SCU_FUN_PIN_UART1_RXD);
+ /* UART2 */
+ val |= (SCU_FUN_PIN_UART2_NCTS | SCU_FUN_PIN_UART2_NDCD |
+ SCU_FUN_PIN_UART2_NDSR | SCU_FUN_PIN_UART2_NRI |
+ SCU_FUN_PIN_UART2_NDTR | SCU_FUN_PIN_UART2_NRTS |
+ SCU_FUN_PIN_UART2_TXD | SCU_FUN_PIN_UART2_RXD);
+ ast_scu_write(val, AST_SCU_FUN_PIN_CTRL2);
+}
+
static void pwm_init(void)
{
uint32_t val;
@@ -560,6 +580,7 @@ extern void espi_init(void);
extern void kcs_init(void);
void ast_g5_intel(void)
{
+ uart_init();
pwm_init();
gpio_init(gpio_table, ARRAY_SIZE(gpio_table));
espi_init();
--
2.17.1
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