arch/arm/mach-s3c24xx/mach-gta02.c - maze/linux - Git at Google

 /*
  * linux/arch/arm/mach-s3c2442/mach-gta02.c
  *
  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
  *
  * Copyright (C) 2006-2009 by Openmoko, Inc.
  * Authors: Harald Welte <laforge@openmoko.org>
  *          Andy Green <andy@openmoko.org>
  *          Werner Almesberger <werner@openmoko.org>
  * All rights reserved.
  *
  * 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 <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/delay.h>
 #include <linux/timer.h>
 #include <linux/init.h>
 #include <linux/gpio.h>
 #include <linux/workqueue.h>
 #include <linux/platform_device.h>
 #include <linux/serial_core.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/s3c24xx.h>

 #include <linux/mmc/host.h>

 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/physmap.h>
 #include <linux/io.h>

 #include <linux/i2c.h>
 #include <linux/regulator/machine.h>

 #include <linux/mfd/pcf50633/core.h>
 #include <linux/mfd/pcf50633/mbc.h>
 #include <linux/mfd/pcf50633/adc.h>
 #include <linux/mfd/pcf50633/gpio.h>
 #include <linux/mfd/pcf50633/pmic.h>
 #include <linux/mfd/pcf50633/backlight.h>

 #include <linux/input.h>
 #include <linux/gpio_keys.h>

 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>

 #include <asm/irq.h>
 #include <asm/mach-types.h>

 #include <mach/regs-irq.h>
 #include <mach/regs-gpio.h>
 #include <mach/regs-gpioj.h>
 #include <mach/fb.h>

 #include <plat/usb-control.h>
 #include <mach/regs-mem.h>
 #include <mach/hardware.h>

 #include <mach/gta02.h>

 #include <plat/regs-serial.h>
 #include <plat/nand.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
 #include <plat/pm.h>
 #include <plat/udc.h>
 #include <plat/gpio-cfg.h>
 #include <plat/iic.h>
 #include <plat/ts.h>

 #include "common.h"

 static struct pcf50633 *gta02_pcf;

 /*
  * This gets called frequently when we paniced.
  */

 static long gta02_panic_blink(int state)
 {
 	long delay = 0;
 	char led;

 	led = (state) ? 1 : 0;
 	gpio_direction_output(GTA02_GPIO_AUX_LED, led);

 	return delay;
 }


 static struct map_desc gta02_iodesc[] __initdata = {
 	{
 		.virtual	= 0xe0000000,
 		.pfn		= __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 		.length		= SZ_1M,
 		.type		= MT_DEVICE
 	},
 };

 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)

 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 	[0] = {
 		.hwport		= 0,
 		.flags		= 0,
 		.ucon		= UCON,
 		.ulcon		= ULCON,
 		.ufcon		= UFCON,
 	},
 	[1] = {
 		.hwport		= 1,
 		.flags		= 0,
 		.ucon		= UCON,
 		.ulcon		= ULCON,
 		.ufcon		= UFCON,
 	},
 	[2] = {
 		.hwport		= 2,
 		.flags		= 0,
 		.ucon		= UCON,
 		.ulcon		= ULCON,
 		.ufcon		= UFCON,
 	},
 };

 #ifdef CONFIG_CHARGER_PCF50633
 /*
  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
  * We use this to recognize that we can pull 1A from the USB socket.
  *
  * These constants are the measured pcf50633 ADC levels with the 1A
  * charger / 48K resistor, and with no pulldown resistor.
  */

 #define ADC_NOM_CHG_DETECT_1A 6
 #define ADC_NOM_CHG_DETECT_USB 43

 static void
 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 {
 	int  ma;

 	/* Interpret charger type */
 	if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {

 		/*
 		 * Sanity - stop GPO driving out now that we have a 1A charger
 		 * GPO controls USB Host power generation on GTA02
 		 */
 		pcf50633_gpio_set(pcf, PCF50633_GPO, 0);

 		ma = 1000;
 	} else
 		ma = 100;

 	pcf50633_mbc_usb_curlim_set(pcf, ma);
 }

 static struct delayed_work gta02_charger_work;
 static int gta02_usb_vbus_draw;

 static void gta02_charger_worker(struct work_struct *work)
 {
 	if (gta02_usb_vbus_draw) {
 		pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 		return;
 	}

 #ifdef CONFIG_PCF50633_ADC
 	pcf50633_adc_async_read(gta02_pcf,
 				PCF50633_ADCC1_MUX_ADCIN1,
 				PCF50633_ADCC1_AVERAGE_16,
 				gta02_configure_pmu_for_charger,
 				NULL);
 #else
 	/*
 	 * If the PCF50633 ADC is disabled we fallback to a
 	 * 100mA limit for safety.
 	 */
 	pcf50633_mbc_usb_curlim_set(pcf, 100);
 #endif
 }

 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)

 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 {
 	if (irq == PCF50633_IRQ_USBINS) {
 		schedule_delayed_work(&gta02_charger_work,
 				      GTA02_CHARGER_CONFIGURE_TIMEOUT);

 		return;
 	}

 	if (irq == PCF50633_IRQ_USBREM) {
 		cancel_delayed_work_sync(&gta02_charger_work);
 		gta02_usb_vbus_draw = 0;
 	}
 }

 static void gta02_udc_vbus_draw(unsigned int ma)
 {
 	if (!gta02_pcf)
 		return;

 	gta02_usb_vbus_draw = ma;

 	schedule_delayed_work(&gta02_charger_work,
 			      GTA02_CHARGER_CONFIGURE_TIMEOUT);
 }
 #else /* !CONFIG_CHARGER_PCF50633 */
 #define gta02_pmu_event_callback	NULL
 #define gta02_udc_vbus_draw		NULL
 #endif

 /*
  * This is called when pc50633 is probed, unfortunately quite late in the
  * day since it is an I2C bus device. Here we can belatedly define some
  * platform devices with the advantage that we can mark the pcf50633 as the
  * parent. This makes them get suspended and resumed with their parent
  * the pcf50633 still around.
  */

 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);


 static char *gta02_batteries[] = {
 	"battery",
 };

 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 	.default_brightness = 0x3f,
 	.default_brightness_limit = 0,
 	.ramp_time = 5,
 };

 static struct pcf50633_platform_data gta02_pcf_pdata = {
 	.resumers = {
 		[0] =	PCF50633_INT1_USBINS |
 			PCF50633_INT1_USBREM |
 			PCF50633_INT1_ALARM,
 		[1] =	PCF50633_INT2_ONKEYF,
 		[2] =	PCF50633_INT3_ONKEY1S,
 		[3] =	PCF50633_INT4_LOWSYS |
 			PCF50633_INT4_LOWBAT |
 			PCF50633_INT4_HIGHTMP,
 	},

 	.batteries = gta02_batteries,
 	.num_batteries = ARRAY_SIZE(gta02_batteries),

 	.charger_reference_current_ma = 1000,

 	.backlight_data = &gta02_backlight_data,

 	.reg_init_data = {
 		[PCF50633_REGULATOR_AUTO] = {
 			.constraints = {
 				.min_uV = 3300000,
 				.max_uV = 3300000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.always_on = 1,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_DOWN1] = {
 			.constraints = {
 				.min_uV = 1300000,
 				.max_uV = 1600000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.always_on = 1,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_DOWN2] = {
 			.constraints = {
 				.min_uV = 1800000,
 				.max_uV = 1800000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.apply_uV = 1,
 				.always_on = 1,
 			},
 		},
 		[PCF50633_REGULATOR_HCLDO] = {
 			.constraints = {
 				.min_uV = 2000000,
 				.max_uV = 3300000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 						REGULATOR_CHANGE_STATUS,
 			},
 		},
 		[PCF50633_REGULATOR_LDO1] = {
 			.constraints = {
 				.min_uV = 3300000,
 				.max_uV = 3300000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_LDO2] = {
 			.constraints = {
 				.min_uV = 3300000,
 				.max_uV = 3300000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_LDO3] = {
 			.constraints = {
 				.min_uV = 3000000,
 				.max_uV = 3000000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_LDO4] = {
 			.constraints = {
 				.min_uV = 3200000,
 				.max_uV = 3200000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_LDO5] = {
 			.constraints = {
 				.min_uV = 3000000,
 				.max_uV = 3000000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 				.valid_ops_mask = REGULATOR_CHANGE_STATUS,
 				.apply_uV = 1,
 			},
 		},
 		[PCF50633_REGULATOR_LDO6] = {
 			.constraints = {
 				.min_uV = 3000000,
 				.max_uV = 3000000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 			},
 		},
 		[PCF50633_REGULATOR_MEMLDO] = {
 			.constraints = {
 				.min_uV = 1800000,
 				.max_uV = 1800000,
 				.valid_modes_mask = REGULATOR_MODE_NORMAL,
 			},
 		},

 	},
 	.probe_done = gta02_pmu_attach_child_devices,
 	.mbc_event_callback = gta02_pmu_event_callback,
 };


 /* NOR Flash. */

 #define GTA02_FLASH_BASE	0x18000000 /* GCS3 */
 #define GTA02_FLASH_SIZE	0x200000 /* 2MBytes */

 static struct physmap_flash_data gta02_nor_flash_data = {
 	.width		= 2,
 };

 static struct resource gta02_nor_flash_resource =
 	DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);

 static struct platform_device gta02_nor_flash = {
 	.name		= "physmap-flash",
 	.id		= 0,
 	.dev		= {
 		.platform_data	= &gta02_nor_flash_data,
 	},
 	.resource	= &gta02_nor_flash_resource,
 	.num_resources	= 1,
 };


 static struct platform_device s3c24xx_pwm_device = {
 	.name		= "s3c24xx_pwm",
 	.num_resources	= 0,
 };

 static struct platform_device gta02_dfbmcs320_device = {
 	.name = "dfbmcs320",
 };

 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 	{
 		I2C_BOARD_INFO("pcf50633", 0x73),
 		.irq = GTA02_IRQ_PCF50633,
 		.platform_data = &gta02_pcf_pdata,
 	},
 	{
 		I2C_BOARD_INFO("wm8753", 0x1a),
 	},
 };

 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 	[0] = {
 		/*
 		 * This name is also hard-coded in the boot loaders, so
 		 * changing it would would require all users to upgrade
 		 * their boot loaders, some of which are stored in a NOR
 		 * that is considered to be immutable.
 		 */
 		.name		= "neo1973-nand",
 		.nr_chips	= 1,
 		.flash_bbt	= 1,
 	},
 };

 /*
  * Choose a set of timings derived from S3C@2442B MCP54
  * data sheet (K5D2G13ACM-D075 MCP Memory).
  */

 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 	.tacls		= 0,
 	.twrph0		= 25,
 	.twrph1		= 15,
 	.nr_sets	= ARRAY_SIZE(gta02_nand_sets),
 	.sets		= gta02_nand_sets,
 };


 /* Get PMU to set USB current limit accordingly. */
 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 	.vbus_draw	= gta02_udc_vbus_draw,
 	.pullup_pin = GTA02_GPIO_USB_PULLUP,
 };

 /* USB */
 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 	.port[0]	= {
 		.flags	= S3C_HCDFLG_USED,
 	},
 	.port[1]	= {
 		.flags	= 0,
 	},
 };

 /* Touchscreen */
 static struct s3c2410_ts_mach_info gta02_ts_info = {
 	.delay			= 10000,
 	.presc			= 0xff, /* slow as we can go */
 	.oversampling_shift	= 2,
 };

 /* Buttons */
 static struct gpio_keys_button gta02_buttons[] = {
 	{
 		.gpio = GTA02_GPIO_AUX_KEY,
 		.code = KEY_PHONE,
 		.desc = "Aux",
 		.type = EV_KEY,
 		.debounce_interval = 100,
 	},
 	{
 		.gpio = GTA02_GPIO_HOLD_KEY,
 		.code = KEY_PAUSE,
 		.desc = "Hold",
 		.type = EV_KEY,
 		.debounce_interval = 100,
 	},
 };

 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 	.buttons = gta02_buttons,
 	.nbuttons = ARRAY_SIZE(gta02_buttons),
 };

 static struct platform_device gta02_buttons_device = {
 	.name = "gpio-keys",
 	.id = -1,
 	.dev = {
 		.platform_data = &gta02_buttons_pdata,
 	},
 };

 static void __init gta02_map_io(void)
 {
 	s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 	s3c24xx_init_clocks(12000000);
 	s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 }


 /* These are the guys that don't need to be children of PMU. */

 static struct platform_device *gta02_devices[] __initdata = {
 	&s3c_device_ohci,
 	&s3c_device_wdt,
 	&s3c_device_sdi,
 	&s3c_device_usbgadget,
 	&s3c_device_nand,
 	&gta02_nor_flash,
 	&s3c24xx_pwm_device,
 	&s3c_device_iis,
 	&samsung_asoc_dma,
 	&s3c_device_i2c0,
 	&gta02_dfbmcs320_device,
 	&gta02_buttons_device,
 	&s3c_device_adc,
 	&s3c_device_ts,
 };

 /* These guys DO need to be children of PMU. */

 static struct platform_device *gta02_devices_pmu_children[] = {
 };


 /*
  * This is called when pc50633 is probed, quite late in the day since it is an
  * I2C bus device.  Here we can define platform devices with the advantage that
  * we can mark the pcf50633 as the parent.  This makes them get suspended and
  * resumed with their parent the pcf50633 still around.  All devices whose
  * operation depends on something from pcf50633 must have this relationship
  * made explicit like this, or suspend and resume will become an unreliable
  * hellworld.
  */

 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 {
 	int n;

 	/* Grab a copy of the now probed PMU pointer. */
 	gta02_pcf = pcf;

 	for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 		gta02_devices_pmu_children[n]->dev.parent = pcf->dev;

 	platform_add_devices(gta02_devices_pmu_children,
 			     ARRAY_SIZE(gta02_devices_pmu_children));
 }

 static void gta02_poweroff(void)
 {
 	pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 }

 static void __init gta02_machine_init(void)
 {
 	/* Set the panic callback to turn AUX LED on or off. */
 	panic_blink = gta02_panic_blink;

 	s3c_pm_init();

 #ifdef CONFIG_CHARGER_PCF50633
 	INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 #endif

 	s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 	s3c24xx_ts_set_platdata(&gta02_ts_info);
 	s3c_ohci_set_platdata(&gta02_usb_info);
 	s3c_nand_set_platdata(&gta02_nand_info);
 	s3c_i2c0_set_platdata(NULL);

 	i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));

 	platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 	pm_power_off = gta02_poweroff;

 	regulator_has_full_constraints();
 }


 MACHINE_START(NEO1973_GTA02, "GTA02")
 	/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 	.atag_offset	= 0x100,
 	.map_io		= gta02_map_io,
 	.init_irq	= s3c24xx_init_irq,
 	.init_machine	= gta02_machine_init,
 	.timer		= &s3c24xx_timer,
 	.restart	= s3c244x_restart,
 MACHINE_END
	/*
	* linux/arch/arm/mach-s3c2442/mach-gta02.c
	*
	* S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
	*
	* Copyright (C) 2006-2009 by Openmoko, Inc.
	* Authors: Harald Welte <laforge@openmoko.org>
	* Andy Green <andy@openmoko.org>
	* Werner Almesberger <werner@openmoko.org>
	* All rights reserved.
	*
	* 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 <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/interrupt.h>
	#include <linux/list.h>
	#include <linux/delay.h>
	#include <linux/timer.h>
	#include <linux/init.h>
	#include <linux/gpio.h>
	#include <linux/workqueue.h>
	#include <linux/platform_device.h>
	#include <linux/serial_core.h>
	#include <linux/spi/spi.h>
	#include <linux/spi/s3c24xx.h>

	#include <linux/mmc/host.h>

	#include <linux/mtd/mtd.h>
	#include <linux/mtd/nand.h>
	#include <linux/mtd/nand_ecc.h>
	#include <linux/mtd/partitions.h>
	#include <linux/mtd/physmap.h>
	#include <linux/io.h>

	#include <linux/i2c.h>
	#include <linux/regulator/machine.h>

	#include <linux/mfd/pcf50633/core.h>
	#include <linux/mfd/pcf50633/mbc.h>
	#include <linux/mfd/pcf50633/adc.h>
	#include <linux/mfd/pcf50633/gpio.h>
	#include <linux/mfd/pcf50633/pmic.h>
	#include <linux/mfd/pcf50633/backlight.h>

	#include <linux/input.h>
	#include <linux/gpio_keys.h>

	#include <asm/mach/arch.h>
	#include <asm/mach/map.h>
	#include <asm/mach/irq.h>

	#include <asm/irq.h>
	#include <asm/mach-types.h>

	#include <mach/regs-irq.h>
	#include <mach/regs-gpio.h>
	#include <mach/regs-gpioj.h>
	#include <mach/fb.h>

	#include <plat/usb-control.h>
	#include <mach/regs-mem.h>
	#include <mach/hardware.h>

	#include <mach/gta02.h>

	#include <plat/regs-serial.h>
	#include <plat/nand.h>
	#include <plat/devs.h>
	#include <plat/cpu.h>
	#include <plat/pm.h>
	#include <plat/udc.h>
	#include <plat/gpio-cfg.h>
	#include <plat/iic.h>
	#include <plat/ts.h>

	#include "common.h"

	static struct pcf50633 *gta02_pcf;

	/*
	* This gets called frequently when we paniced.
	*/

	static long gta02_panic_blink(int state)
	{
	long delay = 0;
	char led;

	led = (state) ? 1 : 0;
	gpio_direction_output(GTA02_GPIO_AUX_LED, led);

	return delay;
	}


	static struct map_desc gta02_iodesc[] __initdata = {
	{
	.virtual = 0xe0000000,
	.pfn = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
	.length = SZ_1M,
	.type = MT_DEVICE
	},
	};

	#define UCON (S3C2410_UCON_DEFAULT \| S3C2443_UCON_RXERR_IRQEN)
	#define ULCON (S3C2410_LCON_CS8 \| S3C2410_LCON_PNONE \| S3C2410_LCON_STOPB)
	#define UFCON (S3C2410_UFCON_RXTRIG8 \| S3C2410_UFCON_FIFOMODE)

	static struct s3c2410_uartcfg gta02_uartcfgs[] = {
	[0] = {
	.hwport = 0,
	.flags = 0,
	.ucon = UCON,
	.ulcon = ULCON,
	.ufcon = UFCON,
	},
	[1] = {
	.hwport = 1,
	.flags = 0,
	.ucon = UCON,
	.ulcon = ULCON,
	.ufcon = UFCON,
	},
	[2] = {
	.hwport = 2,
	.flags = 0,
	.ucon = UCON,
	.ulcon = ULCON,
	.ufcon = UFCON,
	},
	};

	#ifdef CONFIG_CHARGER_PCF50633
	/*
	* On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
	* We use this to recognize that we can pull 1A from the USB socket.
	*
	* These constants are the measured pcf50633 ADC levels with the 1A
	* charger / 48K resistor, and with no pulldown resistor.
	*/

	#define ADC_NOM_CHG_DETECT_1A 6
	#define ADC_NOM_CHG_DETECT_USB 43

	static void
	gta02_configure_pmu_for_charger(struct pcf50633 pcf, void unused, int res)
	{
	int ma;

	/* Interpret charger type */
	if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {

	/*
	* Sanity - stop GPO driving out now that we have a 1A charger
	* GPO controls USB Host power generation on GTA02
	*/
	pcf50633_gpio_set(pcf, PCF50633_GPO, 0);

	ma = 1000;
	} else
	ma = 100;

	pcf50633_mbc_usb_curlim_set(pcf, ma);
	}

	static struct delayed_work gta02_charger_work;
	static int gta02_usb_vbus_draw;

	static void gta02_charger_worker(struct work_struct *work)
	{
	if (gta02_usb_vbus_draw) {
	pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
	return;
	}

	#ifdef CONFIG_PCF50633_ADC
	pcf50633_adc_async_read(gta02_pcf,
	PCF50633_ADCC1_MUX_ADCIN1,
	PCF50633_ADCC1_AVERAGE_16,
	gta02_configure_pmu_for_charger,
	NULL);
	#else
	/*
	* If the PCF50633 ADC is disabled we fallback to a
	* 100mA limit for safety.
	*/
	pcf50633_mbc_usb_curlim_set(pcf, 100);
	#endif
	}

	#define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)

	static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
	{
	if (irq == PCF50633_IRQ_USBINS) {
	schedule_delayed_work(&gta02_charger_work,
	GTA02_CHARGER_CONFIGURE_TIMEOUT);

	return;
	}

	if (irq == PCF50633_IRQ_USBREM) {
	cancel_delayed_work_sync(&gta02_charger_work);
	gta02_usb_vbus_draw = 0;
	}
	}

	static void gta02_udc_vbus_draw(unsigned int ma)
	{
	if (!gta02_pcf)
	return;

	gta02_usb_vbus_draw = ma;

	schedule_delayed_work(&gta02_charger_work,
	GTA02_CHARGER_CONFIGURE_TIMEOUT);
	}
	#else /* !CONFIG_CHARGER_PCF50633 */
	#define gta02_pmu_event_callback NULL
	#define gta02_udc_vbus_draw NULL
	#endif

	/*
	* This is called when pc50633 is probed, unfortunately quite late in the
	* day since it is an I2C bus device. Here we can belatedly define some
	* platform devices with the advantage that we can mark the pcf50633 as the
	* parent. This makes them get suspended and resumed with their parent
	* the pcf50633 still around.
	*/

	static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);


	static char *gta02_batteries[] = {
	"battery",
	};

	static struct pcf50633_bl_platform_data gta02_backlight_data = {
	.default_brightness = 0x3f,
	.default_brightness_limit = 0,
	.ramp_time = 5,
	};

	static struct pcf50633_platform_data gta02_pcf_pdata = {
	.resumers = {
	[0] = PCF50633_INT1_USBINS \|
	PCF50633_INT1_USBREM \|
	PCF50633_INT1_ALARM,
	[1] = PCF50633_INT2_ONKEYF,
	[2] = PCF50633_INT3_ONKEY1S,
	[3] = PCF50633_INT4_LOWSYS \|
	PCF50633_INT4_LOWBAT \|
	PCF50633_INT4_HIGHTMP,
	},

	.batteries = gta02_batteries,
	.num_batteries = ARRAY_SIZE(gta02_batteries),

	.charger_reference_current_ma = 1000,

	.backlight_data = &gta02_backlight_data,

	.reg_init_data = {
	[PCF50633_REGULATOR_AUTO] = {
	.constraints = {
	.min_uV = 3300000,
	.max_uV = 3300000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.always_on = 1,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_DOWN1] = {
	.constraints = {
	.min_uV = 1300000,
	.max_uV = 1600000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.always_on = 1,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_DOWN2] = {
	.constraints = {
	.min_uV = 1800000,
	.max_uV = 1800000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.apply_uV = 1,
	.always_on = 1,
	},
	},
	[PCF50633_REGULATOR_HCLDO] = {
	.constraints = {
	.min_uV = 2000000,
	.max_uV = 3300000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE \|
	REGULATOR_CHANGE_STATUS,
	},
	},
	[PCF50633_REGULATOR_LDO1] = {
	.constraints = {
	.min_uV = 3300000,
	.max_uV = 3300000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_LDO2] = {
	.constraints = {
	.min_uV = 3300000,
	.max_uV = 3300000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_LDO3] = {
	.constraints = {
	.min_uV = 3000000,
	.max_uV = 3000000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_LDO4] = {
	.constraints = {
	.min_uV = 3200000,
	.max_uV = 3200000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_LDO5] = {
	.constraints = {
	.min_uV = 3000000,
	.max_uV = 3000000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	.apply_uV = 1,
	},
	},
	[PCF50633_REGULATOR_LDO6] = {
	.constraints = {
	.min_uV = 3000000,
	.max_uV = 3000000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	},
	},
	[PCF50633_REGULATOR_MEMLDO] = {
	.constraints = {
	.min_uV = 1800000,
	.max_uV = 1800000,
	.valid_modes_mask = REGULATOR_MODE_NORMAL,
	},
	},

	},
	.probe_done = gta02_pmu_attach_child_devices,
	.mbc_event_callback = gta02_pmu_event_callback,
	};


	/* NOR Flash. */

	#define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
	#define GTA02_FLASH_SIZE 0x200000 /* 2MBytes */

	static struct physmap_flash_data gta02_nor_flash_data = {
	.width = 2,
	};

	static struct resource gta02_nor_flash_resource =
	DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);

	static struct platform_device gta02_nor_flash = {
	.name = "physmap-flash",
	.id = 0,
	.dev = {
	.platform_data = &gta02_nor_flash_data,
	},
	.resource = &gta02_nor_flash_resource,
	.num_resources = 1,
	};


	static struct platform_device s3c24xx_pwm_device = {
	.name = "s3c24xx_pwm",
	.num_resources = 0,
	};

	static struct platform_device gta02_dfbmcs320_device = {
	.name = "dfbmcs320",
	};

	static struct i2c_board_info gta02_i2c_devs[] __initdata = {
	{
	I2C_BOARD_INFO("pcf50633", 0x73),
	.irq = GTA02_IRQ_PCF50633,
	.platform_data = &gta02_pcf_pdata,
	},
	{
	I2C_BOARD_INFO("wm8753", 0x1a),
	},
	};

	static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
	[0] = {
	/*
	* This name is also hard-coded in the boot loaders, so
	* changing it would would require all users to upgrade
	* their boot loaders, some of which are stored in a NOR
	* that is considered to be immutable.
	*/
	.name = "neo1973-nand",
	.nr_chips = 1,
	.flash_bbt = 1,
	},
	};

	/*
	* Choose a set of timings derived from S3C@2442B MCP54
	* data sheet (K5D2G13ACM-D075 MCP Memory).
	*/

	static struct s3c2410_platform_nand __initdata gta02_nand_info = {
	.tacls = 0,
	.twrph0 = 25,
	.twrph1 = 15,
	.nr_sets = ARRAY_SIZE(gta02_nand_sets),
	.sets = gta02_nand_sets,
	};


	/* Get PMU to set USB current limit accordingly. */
	static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
	.vbus_draw = gta02_udc_vbus_draw,
	.pullup_pin = GTA02_GPIO_USB_PULLUP,
	};

	/* USB */
	static struct s3c2410_hcd_info gta02_usb_info __initdata = {
	.port[0] = {
	.flags = S3C_HCDFLG_USED,
	},
	.port[1] = {
	.flags = 0,
	},
	};

	/* Touchscreen */
	static struct s3c2410_ts_mach_info gta02_ts_info = {
	.delay = 10000,
	.presc = 0xff, /* slow as we can go */
	.oversampling_shift = 2,
	};

	/* Buttons */
	static struct gpio_keys_button gta02_buttons[] = {
	{
	.gpio = GTA02_GPIO_AUX_KEY,
	.code = KEY_PHONE,
	.desc = "Aux",
	.type = EV_KEY,
	.debounce_interval = 100,
	},
	{
	.gpio = GTA02_GPIO_HOLD_KEY,
	.code = KEY_PAUSE,
	.desc = "Hold",
	.type = EV_KEY,
	.debounce_interval = 100,
	},
	};

	static struct gpio_keys_platform_data gta02_buttons_pdata = {
	.buttons = gta02_buttons,
	.nbuttons = ARRAY_SIZE(gta02_buttons),
	};

	static struct platform_device gta02_buttons_device = {
	.name = "gpio-keys",
	.id = -1,
	.dev = {
	.platform_data = &gta02_buttons_pdata,
	},
	};

	static void __init gta02_map_io(void)
	{
	s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
	s3c24xx_init_clocks(12000000);
	s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
	}


	/* These are the guys that don't need to be children of PMU. */

	static struct platform_device *gta02_devices[] __initdata = {
	&s3c_device_ohci,
	&s3c_device_wdt,
	&s3c_device_sdi,
	&s3c_device_usbgadget,
	&s3c_device_nand,
	&gta02_nor_flash,
	&s3c24xx_pwm_device,
	&s3c_device_iis,
	&samsung_asoc_dma,
	&s3c_device_i2c0,
	&gta02_dfbmcs320_device,
	&gta02_buttons_device,
	&s3c_device_adc,
	&s3c_device_ts,
	};

	/* These guys DO need to be children of PMU. */

	static struct platform_device *gta02_devices_pmu_children[] = {
	};


	/*
	* This is called when pc50633 is probed, quite late in the day since it is an
	* I2C bus device. Here we can define platform devices with the advantage that
	* we can mark the pcf50633 as the parent. This makes them get suspended and
	* resumed with their parent the pcf50633 still around. All devices whose
	* operation depends on something from pcf50633 must have this relationship
	* made explicit like this, or suspend and resume will become an unreliable
	* hellworld.
	*/

	static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
	{
	int n;

	/* Grab a copy of the now probed PMU pointer. */
	gta02_pcf = pcf;

	for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
	gta02_devices_pmu_children[n]->dev.parent = pcf->dev;

	platform_add_devices(gta02_devices_pmu_children,
	ARRAY_SIZE(gta02_devices_pmu_children));
	}

	static void gta02_poweroff(void)
	{
	pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
	}

	static void __init gta02_machine_init(void)
	{
	/* Set the panic callback to turn AUX LED on or off. */
	panic_blink = gta02_panic_blink;

	s3c_pm_init();

	#ifdef CONFIG_CHARGER_PCF50633
	INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
	#endif

	s3c24xx_udc_set_platdata(&gta02_udc_cfg);
	s3c24xx_ts_set_platdata(&gta02_ts_info);
	s3c_ohci_set_platdata(&gta02_usb_info);
	s3c_nand_set_platdata(&gta02_nand_info);
	s3c_i2c0_set_platdata(NULL);

	i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));

	platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
	pm_power_off = gta02_poweroff;

	regulator_has_full_constraints();
	}


	MACHINE_START(NEO1973_GTA02, "GTA02")
	/* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
	.atag_offset = 0x100,
	.map_io = gta02_map_io,
	.init_irq = s3c24xx_init_irq,
	.init_machine = gta02_machine_init,
	.timer = &s3c24xx_timer,
	.restart = s3c244x_restart,
	MACHINE_END