veyron_danger: Update SDMMC power on/off code for v2

This re-factors SDMMC power on/off to make corrections and take
differences between board versions into account. To avoid similar-
but-different case switch statements in romstage.c and mainboard.c,
power on/off functions for SDMMC are split into their own .c file.

BUG=none
BRANCH=none
TEST=built and booted of micro-SD card on Danger v2

Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/280853
Reviewed-by: Julius Werner <jwerner@chromium.org>
Change-Id: Id86ae7f40687e843ffc4e7769309d4678ad54f49
Reviewed-on: https://chromium-review.googlesource.com/284093

src/mainboard/google/veyron_danger/Makefile.inc

@@ -27,6 +27,7 @@ verstage-y += reset.c
 
 romstage-y += boardid.c
 romstage-y += romstage.c
+romstage-y += sdmmc.c
 romstage-y += sdram_configs.c
 romstage-y += reset.c
 
@@ -34,6 +35,7 @@ ramstage-y += boardid.c
 ramstage-y += chromeos.c
 ramstage-y += mainboard.c
 ramstage-y += reset.c
+ramstage-y += sdmmc.c
 
 bootblock-y += memlayout.ld
 verstage-y += memlayout.ld

src/mainboard/google/veyron_danger/board.h

@@ -27,6 +27,8 @@
 #define GPIO_RESET	GPIO(0, B, 5)
 #define GPIO_LCDC_BL	GPIO(7, A, 7)
 
-/* TODO: move setup_chromeos_gpios() here once bootblock code is in mainboard */
+void sdmmc_power_off(void);
+void sdmmc_power_on(void);
+void setup_chromeos_gpios(void);
 
 #endif	/* __MAINBOARD_GOOGLE_VEYRON_DANGER_BOARD_H */

src/mainboard/google/veyron_danger/mainboard.c

@@ -55,9 +55,7 @@ static void configure_sdmmc(void)
 	/* use sdmmc0 io, disable JTAG function */
 	writel(RK_CLRBITS(1 << 12), &rk3288_grf->soc_con0);
 
-	/* Note: these power rail definitions are copied in romstage.c */
-	rk808_configure_ldo(4, 3300);	/* VCCIO_SD */
-	rk808_configure_ldo(5, 3300);	/* VCC33_SD */
+	sdmmc_power_on();
 
 	gpio_input(GPIO(7, A, 5));	/* SDMMC_DET_L */
 }

src/mainboard/google/veyron_danger/romstage.c

@@ -77,12 +77,6 @@ static void configure_l2ctlr(void)
 	write_l2ctlr(l2ctlr);
 }
 
-static void sdmmc_power_off(void)
-{
-	rk808_configure_ldo(4, 0); /* VCCIO_SD */
-	rk808_configure_ldo(5, 0); /* VCC33_SD */
-}
-
 void main(void)
 {
 	void *entry;

src/mainboard/google/veyron_danger/sdmmc.c

@@ -0,0 +1,45 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "board.h"
+
+#include <soc/rk808.h>
+
+static void sdmmc_power(int enable)
+{
+	switch (board_id()) {
+	case 0:
+		/* VCC33_SD is tied to VCC33_SYS and is always on */
+		break;
+	default:
+		rk808_configure_ldo(4, enable ? 3300 : 0); /* VCC33_SD_LDO */
+		rk808_configure_ldo(5, enable ? 3300 : 0); /* VCCIO_SD */
+		break;
+	}
+}
+
+void sdmmc_power_off(void)
+{
+	sdmmc_power(0);
+}
+
+void sdmmc_power_on(void)
+{
+	sdmmc_power(1);
+}