diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2018-05-07 11:56:52 -0700 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2018-05-08 14:40:23 +0000 |
| commit | 8735d1bdc7ff76ee643472012af026e92d82477a (patch) | |
| tree | 8a390a43e9419badb06a136fc689bfcb35c33da5 /src | |
| parent | 3e582d1613c9df08b0a0a745cd720bd397b0cf49 (diff) | |
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@chromium.org>
Reviewed-on: https://review.coreboot.org/26140
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/skylake/uart.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/src/soc/intel/skylake/uart.c b/src/soc/intel/skylake/uart.c index 6f3c21e586..1b4e96eb60 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 @@ void pch_uart_init(void) { 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 @@ void pch_uart_init(void) 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 @@ bool pch_uart_init_debug_controller_on_resume(void) 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; + } } |