/*
   * 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/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 <mach/spi.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,
  };

  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 = {
  	.start		= GTA02_FLASH_BASE,
  	.end		= GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
  	.flags		= IORESOURCE_MEM,
  };
  
  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,
  };
  
  
  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	= s3c2440_restart,

  MACHINE_END