[coreboot-gerrit] Change in coreboot[master]: soc/intel/skylake: Support PCH UART 0 and 1 for console
Duncan Laurie (Code Review)
gerrit at coreboot.org
Mon May 7 21:00:03 CEST 2018
Duncan Laurie has uploaded this change for review. ( https://review.coreboot.org/26140
Change subject: soc/intel/skylake: Support PCH UART 0 and 1 for console
......................................................................
soc/intel/skylake: Support PCH UART 0 and 1 for console
The current PCH UART support for console is limited to UART2.
This change adds support for specifying UART0 or UART1 to be
used instead by changing CONFIG_UART_FOR_CONSOLE in the board
level Kconfig. The default is still 2.
This is tested with a board that uses UART0 for debug output.
Change-Id: I91323ed3298f9b2558764aa4b54173833c021a7b
Signed-off-by: Duncan Laurie <dlaurie at chromium.org>
---
M src/soc/intel/skylake/uart.c
1 file changed, 27 insertions(+), 8 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/40/26140/1
diff --git a/src/soc/intel/skylake/uart.c b/src/soc/intel/skylake/uart.c
index 6f3c21e..1b4e96e 100644
--- a/src/soc/intel/skylake/uart.c
+++ b/src/soc/intel/skylake/uart.c
@@ -31,10 +31,20 @@
#define PCR_SERIAL_IO_GPPRVRW7 0x618
#define PCR_SIO_PCH_LEGACY_UART(idx) (1 << (idx))
-/* UART2 pad configuration. Support RXD and TXD for now. */
-static const struct pad_config uart2_pads[] = {
-/* UART2_RXD */ PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
-/* UART2_TXD */ PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
+/* UART pad configuration. Support RXD and TXD for now. */
+static const struct pad_config uart_pads[][2] = {
+ {
+ PAD_CFG_NF(GPP_C8, NONE, DEEP, NF1), /* UART0_RXD */
+ PAD_CFG_NF(GPP_C9, NONE, DEEP, NF1), /* UART0_TXD */
+ },
+ {
+ PAD_CFG_NF(GPP_C12, NONE, DEEP, NF1), /* UART1_RXD */
+ PAD_CFG_NF(GPP_C13, NONE, DEEP, NF1), /* UART1_TXD */
+ },
+ {
+ PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1), /* UART2_RXD */
+ PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1), /* UART2_TXD */
+ }
};
#if IS_ENABLED(CONFIG_DRIVERS_UART_8250MEM)
@@ -50,9 +60,9 @@
{
uintptr_t base = uart_platform_base(CONFIG_UART_FOR_CONSOLE);
- uart_common_init(PCH_DEV_UART2, base);
+ uart_common_init(pch_uart_get_debug_controller(), base);
- /* Put UART2 in byte access mode for 16550 compatibility */
+ /* Put UART in byte access mode for 16550 compatibility */
if (!IS_ENABLED(CONFIG_DRIVERS_UART_8250MEM_32)) {
pcr_write32(PID_SERIALIO, PCR_SERIAL_IO_GPPRVRW7,
PCR_SIO_PCH_LEGACY_UART(CONFIG_UART_FOR_CONSOLE));
@@ -64,7 +74,8 @@
lpss_clk_read(base);
}
- gpio_configure_pads(uart2_pads, ARRAY_SIZE(uart2_pads));
+ gpio_configure_pads(uart_pads[CONFIG_UART_FOR_CONSOLE],
+ ARRAY_SIZE(uart_pads[CONFIG_UART_FOR_CONSOLE]));
}
#if !ENV_SMM
@@ -96,5 +107,13 @@
device_t pch_uart_get_debug_controller(void)
{
- return PCH_DEV_UART2;
+ switch (CONFIG_UART_FOR_CONSOLE) {
+ case 0:
+ return PCH_DEV_UART0;
+ case 1:
+ return PCH_DEV_UART1;
+ case 2:
+ default:
+ return PCH_DEV_UART2;
+ }
}
--
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I91323ed3298f9b2558764aa4b54173833c021a7b
Gerrit-Change-Number: 26140
Gerrit-PatchSet: 1
Gerrit-Owner: Duncan Laurie <dlaurie at chromium.org>
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