ARMV7: Add support for the TWL6030 I2C power chip used in OMAP4 systems

This patch add the basic infrastructure for the TWL6030 driver and enables
support in the two existing OMAP4 boards, Panda and OMAP4430 SDP

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

drivers/power/Makefile

@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
 LIB 	:= $(obj)libpower.a
 
 COBJS-$(CONFIG_TWL4030_POWER)	+= twl4030.o
+COBJS-$(CONFIG_TWL6030_POWER)	+= twl6030.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)

drivers/power/twl6030.c

@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <config.h>
+#ifdef CONFIG_TWL6030_POWER
+
+#include <twl6030.h>
+
+/* Functions to read and write from TWL6030 */
+static inline int twl6030_i2c_write_u8(u8 chip_no, u8 val, u8 reg)
+{
+	return i2c_write(chip_no, reg, 1, &val, 1);
+}
+
+static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
+{
+	return i2c_read(chip_no, reg, 1, val, 1);
+}
+
+void twl6030_start_usb_charging(void)
+{
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VICHRG_1500,
+							CHARGERUSB_VICHRG);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CIN_LIMIT_NONE,
+							CHARGERUSB_CINLIMIT);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MBAT_TEMP,
+							CONTROLLER_INT_MASK);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MASK_MCHARGERUSB_THMREG,
+							CHARGERUSB_INT_MASK);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VOREG_4P0,
+							CHARGERUSB_VOREG);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL2_VITERM_100,
+							CHARGERUSB_CTRL2);
+	/* Enable USB charging */
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1_EN_CHARGER,
+							CONTROLLER_CTRL1);
+	return;
+}
+
+void twl6030_init_battery_charging(void)
+{
+	twl6030_start_usb_charging();
+	return;
+}
+
+void twl6030_usb_device_settings()
+{
+	u8 data = 0;
+
+	/* Select APP Group and set state to ON */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x21, VUSB_CFG_STATE);
+
+	twl6030_i2c_read_u8(TWL6030_CHIP_PM, &data, MISC2);
+	data |= 0x10;
+
+	/* Select the input supply for VBUS regulator */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, data, MISC2);
+}
+#endif

include/configs/omap4_panda.h

@@ -103,6 +103,9 @@
 #define CONFIG_DRIVER_OMAP34XX_I2C	1
 #define CONFIG_I2C_MULTI_BUS		1
 
+/* TWL6030 */
+#define CONFIG_TWL6030_POWER		1
+
 /* MMC */
 #define CONFIG_MMC			1
 #define CONFIG_OMAP3_MMC		1

include/configs/omap4_sdp4430.h

@@ -104,6 +104,9 @@
 #define CONFIG_DRIVER_OMAP34XX_I2C	1
 #define CONFIG_I2C_MULTI_BUS		1
 
+/* TWL6030 */
+#define CONFIG_TWL6030_POWER		1
+
 /* MMC */
 #define CONFIG_MMC			1
 #define CONFIG_OMAP3_MMC		1

include/twl6030.h

@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+/* I2C chip addresses */
+#define TWL6030_CHIP_PM		0x48
+
+#define TWL6030_CHIP_USB	0x49
+#define TWL6030_CHIP_ADC	0x49
+#define TWL6030_CHIP_CHARGER	0x49
+#define TWL6030_CHIP_PWM	0x49
+
+/* Battery CHARGER REGISTERS */
+#define CONTROLLER_INT_MASK	0xE0
+#define CONTROLLER_CTRL1	0xE1
+#define CONTROLLER_WDG		0xE2
+#define CONTROLLER_STAT1	0xE3
+#define CHARGERUSB_INT_STATUS	0xE4
+#define CHARGERUSB_INT_MASK	0xE5
+#define CHARGERUSB_STATUS_INT1	0xE6
+#define CHARGERUSB_STATUS_INT2	0xE7
+#define CHARGERUSB_CTRL1	0xE8
+#define CHARGERUSB_CTRL2	0xE9
+#define CHARGERUSB_CTRL3	0xEA
+#define CHARGERUSB_STAT1	0xEB
+#define CHARGERUSB_VOREG	0xEC
+#define CHARGERUSB_VICHRG	0xED
+#define CHARGERUSB_CINLIMIT	0xEE
+#define CHARGERUSB_CTRLLIMIT1	0xEF
+
+/* CHARGERUSB_VICHRG */
+#define CHARGERUSB_VICHRG_500		0x4
+#define CHARGERUSB_VICHRG_1500		0xE
+/* CHARGERUSB_CINLIMIT */
+#define CHARGERUSB_CIN_LIMIT_100	0x1
+#define CHARGERUSB_CIN_LIMIT_300	0x5
+#define CHARGERUSB_CIN_LIMIT_500	0x9
+#define CHARGERUSB_CIN_LIMIT_NONE	0xF
+/* CONTROLLER_INT_MASK */
+#define MVAC_FAULT		(1 << 6)
+#define MAC_EOC			(1 << 5)
+#define MBAT_REMOVED		(1 << 4)
+#define MFAULT_WDG		(1 << 3)
+#define MBAT_TEMP		(1 << 2)
+#define MVBUS_DET		(1 << 1)
+#define MVAC_DET		(1 << 0)
+/* CHARGERUSB_INT_MASK */
+#define MASK_MCURRENT_TERM		(1 << 3)
+#define MASK_MCHARGERUSB_STAT		(1 << 2)
+#define MASK_MCHARGERUSB_THMREG		(1 << 1)
+#define MASK_MCHARGERUSB_FAULT		(1 << 0)
+/* CHARGERUSB_VOREG */
+#define CHARGERUSB_VOREG_3P52		0x01
+#define CHARGERUSB_VOREG_4P0		0x19
+#define CHARGERUSB_VOREG_4P2		0x23
+#define CHARGERUSB_VOREG_4P76		0x3F
+/* CHARGERUSB_CTRL2 */
+#define CHARGERUSB_CTRL2_VITERM_50	(0 << 5)
+#define CHARGERUSB_CTRL2_VITERM_100	(1 << 5)
+#define CHARGERUSB_CTRL2_VITERM_150	(2 << 5)
+/* CONTROLLER_CTRL1 */
+#define CONTROLLER_CTRL1_EN_CHARGER	(1 << 4)
+#define CONTROLLER_CTRL1_SEL_CHARGER	(1 << 3)
+
+#define VUSB_CFG_STATE		0xA2
+#define MISC2			0xE5
+
+void twl6030_init_battery_charging(void);
+void twl6030_usb_device_settings(void);