tegra132: introduce romstage_mainboard_init()

Instead of calling out with function names all the possible
combinations of interface and device provide one call to the
mainboard to configure all the necessary bits.

BUG=chrome-os-partner:31104
BUG=chrome-os-partner:31105
BRANCH=None
TEST=Built and ran on rush.

Change-Id: Id7817e85065884d64f90ac514bf698bf539f2afe
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: f4f63f5965d403a32872d7b52c180694f5ef679d
Original-Change-Id: Id27d9c2da4dccdff38c48dc5cdeb1a68cf23cbfc
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/210838
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/8901
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

src/mainboard/google/rush/romstage.c

@@ -34,7 +34,7 @@ static void configure_tpm_i2c_bus(void)
 	i2c_init(2);
 }
 
-void mainboard_init_tpm_i2c(void)
+static void mainboard_init_tpm_i2c(void)
 {
 	clock_enable_clear_reset(0, 0, CLK_U_I2C3, 0, 0, 0);
 
@@ -51,7 +51,7 @@ void mainboard_init_tpm_i2c(void)
 	configure_tpm_i2c_bus();
 }
 
-void mainboard_init_ec_spi(void)
+static void mainboard_init_ec_spi(void)
 {
 	clock_enable_clear_reset(0, CLK_H_SBC1, 0, 0, 0, 0);
 
@@ -75,9 +75,10 @@ void mainboard_init_ec_spi(void)
 	clock_configure_source(sbc1, CLK_M, 500);
 }
 
-void mainboard_init_ec_i2c(void)
+void romstage_mainboard_init(void)
 {
-	/* Empty - Rush uses SPI to communicate with the EC */
+	mainboard_init_tpm_i2c();
+	mainboard_init_ec_spi();
 }
 
 void mainboard_configure_pmc(void)

src/mainboard/google/rush_ryu/romstage.c

@@ -38,7 +38,7 @@ static void configure_ec_i2c_bus(void)
 	i2c_init(1);
 }
 
-void mainboard_init_tpm_i2c(void)
+static void mainboard_init_tpm_i2c(void)
 {
 	clock_enable_clear_reset(0, 0, CLK_U_I2C3, 0, 0, 0);
 
@@ -54,12 +54,7 @@ void mainboard_init_tpm_i2c(void)
 	configure_tpm_i2c_bus();
 }
 
-void mainboard_init_ec_spi(void)
-{
-	/* Empty - Ryu uses I2C to communicate with the EC */
-}
-
-void mainboard_init_ec_i2c(void)
+static void mainboard_init_ec_i2c(void)
 {
 	clock_enable_clear_reset(0, CLK_H_I2C2, 0, 0, 0, 0);
 
@@ -73,6 +68,12 @@ void mainboard_init_ec_i2c(void)
 	configure_ec_i2c_bus();
 }
 
+void romstage_mainboard_init(void)
+{
+	mainboard_init_tpm_i2c();
+	mainboard_init_ec_i2c();
+}
+
 void mainboard_configure_pmc(void)
 {
 }

src/soc/nvidia/tegra132/include/soc/romstage.h

@@ -20,10 +20,10 @@
 #ifndef __SOC_NVIDIA_TEGRA132_SOC_ROMSTAGE_H__
 #define __SOC_NVIDIA_TEGRA132_SOC_ROMSTAGE_H__
 
+void romstage(void);
+void romstage_mainboard_init(void);
+
 void mainboard_configure_pmc(void);
 void mainboard_enable_vdd_cpu(void);
-void mainboard_init_tpm_i2c(void);
-void mainboard_init_ec_spi(void);
-void mainboard_init_ec_i2c(void);
 
 #endif /* __SOC_NVIDIA_TEGRA132_SOC_ROMSTAGE_H__ */

src/soc/nvidia/tegra132/romstage.c

@@ -32,7 +32,25 @@
 #include <soc/clock.h>
 #include <soc/romstage.h>
 
-void romstage(void);
+void __attribute__((weak)) romstage_mainboard_init(void)
+{
+	/* Default empty implementation. */
+}
+
+static void *load_ramstage(void)
+{
+	void *entry;
+	/*
+	 * This platform does not need to cache a loaded ramstage nor do we
+	 * go down this path on resume. Therefore, no romstage_handoff is
+	 * required.
+	 */
+	entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA,
+				CONFIG_CBFS_PREFIX "/ramstage");
+
+	return entry;
+}
+
 void romstage(void)
 {
 	void *entry;
@@ -67,12 +85,14 @@ void romstage(void)
 	ccplex_load_mts();
 	printk(BIOS_INFO, "T132 romstage: MTS loading done\n");
 
-	mainboard_init_tpm_i2c();
-	mainboard_init_ec_spi();
-	mainboard_init_ec_i2c();
+	romstage_mainboard_init();
 
-	entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA,
-				CONFIG_CBFS_PREFIX "/ramstage");
+	entry = load_ramstage();
+
+	if (entry == NULL) {
+		printk(BIOS_INFO, "T132 romstage: error loading ramstage\n");
+		clock_halt_avp();
+	}
 
 	cbmemc_reinit();