veyron_pinky: Move PMIC driver into SoC directory

The Rk808 PMIC is a part that will probably be used by most Rk3288
boards, so it makes sense to keep it as common code in the the SoC
directory. This patch puts LDO control functions into rk3288/rk808.c, so
that the mainboard only has to call a simple interface to set up the
specific LDOs it requires.

BUG=chrome-os-partner:30167
TEST=Booted both this and the old version with a stubbed-out
i2c_writeb(), ensured that the final values are the same.

Change-Id: I7efa60f8a357ce6be7490e64d2e0e3f72ad16f1c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4df22cd78ee04fefc6f7fa0e5c3d903eb1794422
Original-Change-Id: Ic172f9c402e829995f049726d3cb6dbd637039d1
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/217598
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8871
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

src/mainboard/google/veyron_pinky/Makefile.inc

@@ -24,5 +24,4 @@ romstage-y += sdram_configs.c
 ramstage-y += boardid.c
 ramstage-y += chromeos.c
 ramstage-y += mainboard.c
-ramstage-y += pmic.c
 

src/mainboard/google/veyron_pinky/mainboard.c

@@ -29,8 +29,8 @@
 #include <soc/rockchip/rk3288/soc.h>
 #include <soc/rockchip/rk3288/pmu.h>
 #include <soc/rockchip/rk3288/clock.h>
+#include <soc/rockchip/rk3288/rk808.h>
 #include <soc/rockchip/rk3288/spi.h>
-#include "pmic.h"
 
 #define DRAM_START	(CONFIG_SYS_SDRAM_BASE >> 20)
 #define DRAM_SIZE	CONFIG_DRAM_SIZE_MB
@@ -110,6 +110,14 @@ static void configure_i2s(void)
 	rkclk_configure_i2s(12288000);
 }
 
+static void pmic_init(unsigned int bus)
+{
+	rk808_configure_ldo(bus, 4, 1800);	/* VCC18_LCD */
+	rk808_configure_ldo(bus, 5, 1800);	/* VCC18_CODEC */
+	rk808_configure_ldo(bus, 6, 1000);	/* VCC10_LCD */
+	rk808_configure_ldo(bus, 8, 3300);	/* VCCIO_SD */
+}
+
 static void mainboard_init(device_t dev)
 {
 	setup_iomux();

src/mainboard/google/veyron_pinky/pmic.c

@@ -1,85 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2014 Rockchip 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 <console/console.h>
-#include <device/i2c.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include "pmic.h"
-
-#define RK808_ADDR	0x1b
-#define LOD1EN		(1 << 0)
-#define LOD2EN		(1 << 1)
-#define LOD3EN		(1 << 2)
-#define LOD4EN		(1 << 3)
-#define LOD5EN		(1 << 4)
-#define LOD6EN		(1 << 5)
-#define LOD7EN		(1 << 6)
-#define LOD8EN		(1 << 7)
-
-#define LDO_BASE18V	18
-#define LDO_BASE08V	8
-#define LDOVSEL(mV, base) (mV/100 - base)
-
-struct rk808_reg {
-	 u8 reg;
-	 u8 val;
-};
-
-enum {
-	 LDO_EN = 0x24,
-	 LDO1_ONSEL = 0x3B,
-	 LDO1_SLPSEL,
-	 LDO2_ONSEL,
-	 LDO2_SLPSEL,
-	 LDO3_ONSEL,
-	 LDO3_SLPSEL,
-	 LDO4_ONSEL,
-	 LDO4_SLPSEL,
-	 LDO5_ONSEL,
-	 LDO5_SLPSEL,
-	 LDO6_ONSEL,
-	 LDO6_SLPSEL,
-	 LDO7_ONSEL,
-	 LDO7_SLPSEL,
-	 LDO8_ONSEL,
-	 LDO8_SLPSEL,
-};
-
-static struct rk808_reg ldo_initlist[] = {
-	 {LDO4_ONSEL, LDOVSEL(1800, LDO_BASE18V)}, /*vcc18_lcd*/
-	 {LDO5_ONSEL, LDOVSEL(1800, LDO_BASE18V)}, /*vcc18_codec*/
-	 {LDO6_ONSEL, LDOVSEL(1000, LDO_BASE08V)}, /*vcc10_lcd*/
-	 {LDO8_ONSEL, LDOVSEL(3300, LDO_BASE18V)}, /*vccio_sd*/
-};
-
-void pmic_init(unsigned int bus)
-{
-	uint8_t read_reg;
-	int i;
-	for (i = 0; i < ARRAY_SIZE(ldo_initlist); i++) {
-		struct rk808_reg *reg = &ldo_initlist[i];
-		i2c_writeb(bus, RK808_ADDR, reg->reg, reg->val);
-	}
-
-	/*enable ldo4,ldo5,ldo6,ldo8*/
-	i2c_readb(bus, RK808_ADDR, LDO_EN, &read_reg);
-	i2c_writeb(bus, RK808_ADDR, LDO_EN, read_reg | LOD8EN | LOD6EN
-						     | LOD5EN | LOD4EN);
-}

src/soc/rockchip/rk3288/Makefile.inc

@@ -50,6 +50,7 @@ ramstage-y += clock.c
 ramstage-y += spi.c
 ramstage-y += gpio.c
 ramstage-y += media.c
+ramstage-y += rk808.c
 ramstage-$(CONFIG_DRIVERS_UART) += uart.c
 
 $(objcbfs)/bootblock.raw.elf: $(objcbfs)/bootblock.elf

src/soc/rockchip/rk3288/rk808.c

@@ -0,0 +1,66 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Rockchip 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 <assert.h>
+#include <console/console.h>
+#include <device/i2c.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "rk808.h"
+
+#define RK808_ADDR	0x1b
+
+#define LDO_EN		0x24
+#define LDO_ONSEL(i)	(0x39 + 2 * i)
+#define LDO_SLPSEL(i)	(0x3a + 2 * i)
+
+static void rk808_clrsetbits(uint8_t bus, uint8_t reg, uint8_t clr, uint8_t set)
+{
+	uint8_t value;
+
+	if (i2c_readb(bus, RK808_ADDR, reg, &value) ||
+	    i2c_writeb(bus, RK808_ADDR, reg, (value & ~clr) | set))
+		printk(BIOS_ERR, "ERROR: Cannot set Rk808[%#x]!\n", reg);
+}
+
+void rk808_configure_ldo(uint8_t bus, int ldo, int millivolts)
+{
+	uint8_t vsel;
+
+	switch (ldo) {
+	case 1:
+	case 2:
+	case 4:
+	case 5:
+	case 8:
+		vsel = millivolts / 100 - 18;
+		break;
+	case 3:
+	case 6:
+	case 7:
+		vsel = millivolts / 100 - 8;
+		break;
+	default:
+		die("Unknown LDO index!");
+	}
+	assert(vsel <= 0x10);
+
+	rk808_clrsetbits(bus, LDO_ONSEL(ldo), 0x1f, vsel);
+	rk808_clrsetbits(bus, LDO_EN, 0, 1 << (ldo - 1));
+}

src/soc/rockchip/rk3288/rk808.h

@@ -19,5 +19,7 @@
 
 #ifndef __SOC_ROCKCHIP_RK3288_PMIC_H__
 #define __SOC_ROCKCHIP_RK3288_PMIC_H__
-void pmic_init(unsigned int bus);
+
+void rk808_configure_ldo(uint8_t bus, int ldo, int millivolts);
+
 #endif