mainboard/google/kahlee: Prepare for variants

Move files that are particularly specific to the mainboard into the
variant directory.  Files that only have small areas of mainboard
specific pieces use #if to separate between the boards.

Add memory.c to split out the variant board id into a weak function.
Add baseboard/gpio.h to satisfy the build - this will be updated in the
next commit.

BUG=b:68293392

Change-Id: I7c1beb45f571f2547f3b5b0d7ec78923d0cec761
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/22185
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/kahlee/BiosCallOuts.c

@@ -19,17 +19,18 @@
 #include <soc/southbridge.h>
 #include <stdlib.h>
 
-extern const GPIO_CONTROL oem_kahlee_gpio[];
+extern const GPIO_CONTROL agesa_board_gpios[];
 
 void platform_FchParams_reset(FCH_RESET_DATA_BLOCK *FchParams_reset)
 {
-	FchParams_reset->EarlyOemGpioTable = (void *)oem_kahlee_gpio;
+	FchParams_reset->EarlyOemGpioTable = (void *)agesa_board_gpios;
 }
 
 void platform_FchParams_env(FCH_DATA_BLOCK *FchParams_env)
 {
-	FchParams_env->PostOemGpioTable = (void *)oem_kahlee_gpio;
+	FchParams_env->PostOemGpioTable = (void *)agesa_board_gpios;
 
 	/* SDHCI/MMC configuration */
-	FchParams_env->Sd.SdSlotType = 1; // EMMC
+	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_KAHLEE))
+		FchParams_env->Sd.SdSlotType = 1; // EMMC
 }

src/mainboard/google/kahlee/Kconfig

@@ -35,9 +35,17 @@ config MAINBOARD_DIR
 	string
 	default google/kahlee
 
+config VARIANT_DIR
+	string
+	default "kahlee" if BOARD_GOOGLE_KAHLEE
+
 config MAINBOARD_PART_NUMBER
 	string
-	default "Kahlee"
+	default "Kahlee" if BOARD_GOOGLE_KAHLEE
+
+config DEVICETREE
+	string
+	default "variants/${CONFIG_VARIANT_DIR}/devicetree.cb"
 
 config MAX_CPUS
 	int
@@ -66,7 +74,7 @@ config CHROMEOS
 config GBB_HWID
 	string
 	depends on CHROMEOS
-	default "KAHLEE TEST 6421"
+	default "KAHLEE TEST 6421" if BOARD_GOOGLE_KAHLEE
 
 config AMD_FWM_POSITION_INDEX
 	int

src/mainboard/google/kahlee/Makefile.inc

@@ -17,22 +17,25 @@ bootblock-y += bootblock/bootblock.c
 bootblock-y += BiosCallOuts.c
 bootblock-y += bootblock/OemCustomize.c
 bootblock-y += ec.c
-bootblock-y += gpio.c
 
 romstage-y += BiosCallOuts.c
 romstage-y += boardid.c
 romstage-y += chromeos.c
-romstage-y += gpio.c
 romstage-y += OemCustomize.c
 
 ramstage-y += BiosCallOuts.c
 ramstage-y += boardid.c
 ramstage-y += chromeos.c
 ramstage-y += ec.c
-ramstage-y += gpio.c
 ramstage-y += OemCustomize.c
 
 verstage-y += chromeos.c
 verstage-y += ec.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
+
+subdirs-y += variants/baseboard
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/include
+
+subdirs-y += variants/$(VARIANT_DIR)
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include

src/mainboard/google/kahlee/boardid.c

@@ -16,19 +16,15 @@
 #include <boardid.h>
 #include <console/console.h>
 #include <gpio.h>
+#include <variant/gpio.h>
+#include <baseboard/variants.h>
 
 uint8_t board_id(void)
 {
 	MAYBE_STATIC int id = -1;
 
-	gpio_t gpios[] = {
-		GPIO_135,
-		GPIO_140,
-		GPIO_144,
-	};
-
 	if (id < 0) {
-		id = gpio_base2_value(gpios, ARRAY_SIZE(gpios));
+		id = variant_board_id();
 		printk(BIOS_SPEW, "Board ID: %#x.\n", id);
 	}
 

src/mainboard/google/kahlee/chromeos.c

@@ -19,10 +19,7 @@
 #include <boot/coreboot_tables.h>
 #include <console/console.h>
 #include <gpio.h>
-
-/* SPI Write protect */
-#define CROS_WP_GPIO		GPIO_142
-#define GPIO_EC_IN_RW		GPIO_15
+#include <variant/gpio.h>
 
 void fill_lb_gpios(struct lb_gpios *gpios)
 {

src/mainboard/google/kahlee/ec.h

@@ -18,11 +18,7 @@
 
 #include <ec/ec.h>
 #include <ec/google/chromeec/ec_commands.h>
-
-/* AGPIO22 -> GPE3 */
-#define EC_SCI_GPI   3
-/* GPIO_S5_07 is EC_SMI#, but it is bit 23 in GPE_STS and ALT_GPIO_SMI. */
-#define EC_SMI_GPI   23
+#include <variant/gpio.h>
 
 #define MAINBOARD_EC_SCI_EVENTS \
 	(EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED)        |\

src/mainboard/google/kahlee/variants/baseboard/include/baseboard/gpio.h

@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __BASEBOARD_GPIO_H__
+#define __BASEBOARD_GPIO_H__
+
+#ifndef __ACPI__
+#include <soc/gpio.h>
+
+# define MEM_CONFIG0		GPIO_0
+# define MEM_CONFIG1		GPIO_0
+# define MEM_CONFIG2		GPIO_0
+# define MEM_CONFIG3		GPIO_0
+
+/* SPI Write protect */
+#define CROS_WP_GPIO		GPIO_0
+#define GPIO_EC_IN_RW		GPIO_0
+
+#endif /* _ACPI__ */
+
+#define EC_SCI_GPI		0
+
+#define EC_SMI_GPI		0
+
+#endif /* __BASEBOARD_GPIO_H__ */

src/mainboard/google/kahlee/variants/baseboard/include/baseboard/variants.h

@@ -0,0 +1,24 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+
+#ifndef __BASEBOARD_VARIANTS_H__
+#define __BASEBOARD_VARIANTS_H__
+
+#include <stddef.h>
+
+size_t variant_board_id(void);
+
+#endif /* __BASEBOARD_VARIANTS_H__ */

src/mainboard/google/kahlee/variants/kahlee/Makefile.inc

@@ -0,0 +1,22 @@
+#
+# This file is part of the coreboot project.
+#
+# Copyright (C) 2017 Google, Inc.
+#
+# 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
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+
+bootblock-y += gpio.c
+
+romstage-y += gpio.c
+romstage-y += memory.c
+
+ramstage-y += gpio.c
+ramstage-y += memory.c

src/mainboard/google/kahlee/variants/kahlee/gpio.c

@@ -19,8 +19,9 @@
 #include <soc/smi.h>
 #include <soc/southbridge.h>
 #include <stdlib.h>
+#include <variant/gpio.h>
 
-const GPIO_CONTROL oem_kahlee_gpio[] = {
+const GPIO_CONTROL agesa_board_gpios[] = {
 	/* AGPIO2 PCIE/WLAN WAKE# SCI*/
 	{2, Function1, FCH_GPIO_PULL_UP_ENABLE },
 

src/mainboard/google/kahlee/variants/kahlee/include/variant/gpio.h

@@ -0,0 +1,39 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __VARIANT_GPIO_H__
+#define __VARIANT_GPIO_H__
+
+#ifndef __ACPI__
+#include <soc/gpio.h>
+
+#define MEM_CONFIG0	GPIO_135
+#define MEM_CONFIG1	GPIO_140
+#define MEM_CONFIG2	GPIO_144
+
+/* SPI Write protect */
+#define CROS_WP_GPIO		GPIO_142
+#define GPIO_EC_IN_RW		GPIO_15
+
+#endif /* _ACPI__ */
+
+/* AGPIO22 -> GPE3 */
+#define EC_SCI_GPI		3
+
+/* TODO: Fix this */
+/* GPIO_S5_07 is EC_SMI#, but it is bit 23 in GPE_STS and ALT_GPIO_SMI. */
+#define EC_SMI_GPI		23
+
+#endif /* __VARIANT_GPIO_H__ */

src/mainboard/google/kahlee/variants/kahlee/memory.c

@@ -0,0 +1,29 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 Google Inc.
+ *
+ * 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
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <gpio.h> /* src/include/gpio.h */
+#include <baseboard/variants.h>
+#include <baseboard/gpio.h>
+
+size_t variant_board_id(void)
+{
+	gpio_t pads[] = {
+		[2] = MEM_CONFIG2,
+		[1] = MEM_CONFIG1,
+		[0] = MEM_CONFIG0,
+	};
+
+	return gpio_pullup_base2_value(pads, ARRAY_SIZE(pads));
+}