diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2020-06-11 16:57:23 -0600 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2020-06-18 16:43:09 +0000 |
| commit | 34fb9399de46574b4a6d8a3a822f430061216137 (patch) | |
| tree | 9887ada2ad7dc98121383f035e6fae35925c4325 | |
| parent | ef3395d990bbf1118a8d4e367a986bdbc92b1820 (diff) | |
soc/amd/picasso: Add ability to enable/disable UART to device tree
If we are not using the UARTs or they don't have the correct GPIOs
configured we should let the mainboard disable them.
BUG=b:153001807
TEST=Dump SSDT and see UART device is disabled
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ifc04e36e0ebe5cce4b6cc228c7174dc76f2ffa4a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42327
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
| -rw-r--r-- | src/soc/amd/picasso/acpi/sb_fch.asl | 20 | ||||
| -rw-r--r-- | src/soc/amd/picasso/uart.c | 45 |
2 files changed, 45 insertions, 20 deletions
diff --git a/src/soc/amd/picasso/acpi/sb_fch.asl b/src/soc/amd/picasso/acpi/sb_fch.asl index 0bc9b8c0b0..0801c11722 100644 --- a/src/soc/amd/picasso/acpi/sb_fch.asl +++ b/src/soc/amd/picasso/acpi/sb_fch.asl @@ -122,11 +122,6 @@ Device (FUR0) Return (Local0) } } - - Method (_STA, 0x0, NotSerialized) - { - Return (0x0F) - } } Device (FUR1) { @@ -158,11 +153,6 @@ Device (FUR1) { Return (Local0) } } - - Method (_STA, 0x0, NotSerialized) - { - Return (0x0F) - } } Device (FUR2) { @@ -194,11 +184,6 @@ Device (FUR2) { Return (Local0) } } - - Method (_STA, 0x0, NotSerialized) - { - Return (0x0F) - } } Device (FUR3) { @@ -230,11 +215,6 @@ Device (FUR3) { Return (Local0) } } - - Method (_STA, 0x0, NotSerialized) - { - Return (0x0F) - } } Device (I2C2) { diff --git a/src/soc/amd/picasso/uart.c b/src/soc/amd/picasso/uart.c index 0d97fd701e..42ae8e629b 100644 --- a/src/soc/amd/picasso/uart.c +++ b/src/soc/amd/picasso/uart.c @@ -1,6 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <acpi/acpigen.h> #include <console/uart.h> +#include <console/console.h> #include <commonlib/helpers.h> #include <device/mmio.h> #include <amdblocks/gpio_banks.h> @@ -108,9 +110,52 @@ static const char *uart_acpi_name(const struct device *dev) } } +/* Even though this is called enable, it gets called for both enabled and disabled devices. */ +static void uart_enable(struct device *dev) +{ + int dev_id; + + switch (dev->path.mmio.addr) { + case APU_UART0_BASE: + dev_id = FCH_AOAC_DEV_UART0; + break; + case APU_UART1_BASE: + dev_id = FCH_AOAC_DEV_UART1; + break; + case APU_UART2_BASE: + dev_id = FCH_AOAC_DEV_UART2; + break; + case APU_UART3_BASE: + dev_id = FCH_AOAC_DEV_UART3; + break; + default: + printk(BIOS_ERR, "%s: Unknown device: %s\n", __func__, dev_path(dev)); + return; + } + + if (dev->enabled) { + power_on_aoac_device(dev_id); + wait_for_aoac_enabled(dev_id); + } else { + power_off_aoac_device(dev_id); + } +} + +/* This gets called for both enabled and disabled devices. */ +static void uart_inject_ssdt(const struct device *dev) +{ + acpigen_write_scope(acpi_device_path(dev)); + + acpigen_write_STA(acpi_device_status(dev)); + + acpigen_pop_len(); /* Scope */ +} + struct device_operations picasso_uart_mmio_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, .scan_bus = scan_static_bus, .acpi_name = uart_acpi_name, + .enable = uart_enable, + .acpi_fill_ssdt = uart_inject_ssdt, }; |