soc/intel/apollolake: Clean up UART code

Clean up and move UART related code under a single uart.c file.

Change-Id: I9a30258ba43ee5920f585c1bd06bc25773778ec4
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/22754
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>

1 files changed, 55 insertions, 1 deletions

diff --git a/src/soc/intel/apollolake/uart.c b/src/soc/intel/apollolake/uart.c
index 673039cbe8..54b280d7b8 100644
--- a/src/soc/intel/apollolake/uart.c
+++ b/src/soc/intel/apollolake/uart.c
@@ -1,7 +1,7 @@
 /*
  * This file is part of the coreboot project.
  *
- * Copyright (C) 2015 Intel Corp.
+ * Copyright (C) 2015-2017 Intel Corp.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,11 +21,60 @@
  */
 
 #include <cbmem.h>
+#include <console/uart.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <intelblocks/uart.h>
+#include <soc/gpio.h>
 #include <soc/nvs.h>
 #include <soc/pci_devs.h>
+#include <soc/uart.h>
+
+static const struct pad_config uart_gpios[] = {
+#if IS_ENABLED(CONFIG_SOC_INTEL_GLK)
+	PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_60, NATIVE, DEEP, NF1, HIZCRx1,
+		DISPUPD), /* LPSS_UART0_RXD */
+	PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_61, NATIVE, DEEP, NF1, HIZCRx1,
+		DISPUPD), /* LPSS_UART0_TXD */
+	PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_64, NATIVE, DEEP, NF1, HIZCRx1,
+		DISPUPD), /* LPSS_UART2_RXD */
+	PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_65, NATIVE, DEEP, NF1, HIZCRx1,
+		DISPUPD), /* LPSS_UART2_TXD */
+#else
+	PAD_CFG_NF(GPIO_42, NATIVE, DEEP, NF1),		/* UART1 RX */
+	PAD_CFG_NF(GPIO_43, NATIVE, DEEP, NF1),		/* UART1 TX */
+	PAD_CFG_NF(GPIO_46, NATIVE, DEEP, NF1),		/* UART2 RX */
+	PAD_CFG_NF(GPIO_47, NATIVE, DEEP, NF1),		/* UART2 TX */
+#endif
+};
+
+static inline int invalid_uart_for_console(void)
+{
+	/* There are actually only 2 UARTS, and they are named UART1 and
+	 * UART2. They live at pci functions 1 and 2 respectively. */
+	if (CONFIG_UART_FOR_CONSOLE > 2 || CONFIG_UART_FOR_CONSOLE < 1)
+		return 1;
+	return 0;
+}
+
+void pch_uart_init(void)
+{
+	uintptr_t base = CONFIG_CONSOLE_UART_BASE_ADDRESS;
+	device_t uart = _PCH_DEV(UART, CONFIG_UART_FOR_CONSOLE & 3);
+
+	/* Get a 0-based pad index. See invalid_uart_for_console() above. */
+	const int pad_index = CONFIG_UART_FOR_CONSOLE - 1;
+
+	if (invalid_uart_for_console())
+		return;
+
+	/* Configure the 2 pads per UART. */
+	gpio_configure_pads(&uart_gpios[pad_index * 2], 2);
+
+	/* Program UART2 BAR0, command, reset and clock register */
+	uart_common_init(uart, base);
+
+}
 
 #if !ENV_SMM
 void pch_uart_read_resources(struct device *dev)
@@ -55,3 +104,8 @@ device_t pch_uart_get_debug_controller(void)
 {
 	return _PCH_DEV(UART, CONFIG_UART_FOR_CONSOLE);
 }
+
+uintptr_t uart_platform_base(int idx)
+{
+	return CONFIG_CONSOLE_UART_BASE_ADDRESS;
+}