/* Machine specific code for the Acer n30, Acer N35, Navman PiN 570,
 * Yakumo AlphaX and Airis NC05 PDAs.
 *
 * Copyright (c) 2003-2005 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * Copyright (c) 2005-2008 Christer Weinigel <christer@weinigel.se>
 *
 * There is a wiki with more information about the n30 port at
 * http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/types.h>

#include <linux/delay.h>
#include <linux/gpio_keys.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/timer.h>

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

#include <asm/arch/fb.h>
#include <asm/arch/leds-gpio.h>
#include <asm/arch/regs-gpio.h>
#include <asm/arch/regs-lcd.h>

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

#include <asm/plat-s3c/iic.h>
#include <asm/plat-s3c/regs-serial.h>

#include <asm/plat-s3c24xx/clock.h>
#include <asm/plat-s3c24xx/cpu.h>
#include <asm/plat-s3c24xx/devs.h>
#include <asm/plat-s3c24xx/s3c2410.h>
#include <asm/plat-s3c24xx/udc.h>

static struct map_desc n30_iodesc[] __initdata = {
	/* nothing here yet */
};

static struct s3c2410_uartcfg n30_uartcfgs[] = {
	/* Normal serial port */
	[0] = {
		.hwport	     = 0,
		.flags	     = 0,
		.ucon	     = 0x2c5,
		.ulcon	     = 0x03,
		.ufcon	     = 0x51,
	},
	/* IR port */
	[1] = {
		.hwport	     = 1,
		.flags	     = 0,
		.uart_flags  = UPF_CONS_FLOW,
		.ucon	     = 0x2c5,
		.ulcon	     = 0x43,
		.ufcon	     = 0x51,
	},
	/* On the N30 the bluetooth controller is connected here.
	 * On the N35 and variants the GPS receiver is connected here. */
	[2] = {
		.hwport	     = 2,
		.flags	     = 0,
		.ucon	     = 0x2c5,
		.ulcon	     = 0x03,
		.ufcon	     = 0x51,
	},
};

static void n30_udc_pullup(enum s3c2410_udc_cmd_e cmd)
{
	switch (cmd) {
	case S3C2410_UDC_P_ENABLE :
		s3c2410_gpio_setpin(S3C2410_GPB3, 1);
		break;
	case S3C2410_UDC_P_DISABLE :
		s3c2410_gpio_setpin(S3C2410_GPB3, 0);
		break;
	case S3C2410_UDC_P_RESET :
		break;
	default:
		break;
	}
}

static struct s3c2410_udc_mach_info n30_udc_cfg __initdata = {
	.udc_command		= n30_udc_pullup,
	.vbus_pin		= S3C2410_GPG1,
	.vbus_pin_inverted	= 0,
};

static struct gpio_keys_button n30_buttons[] = {
	{
		.gpio		= S3C2410_GPF0,
		.code		= KEY_POWER,
		.desc		= "Power",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG9,
		.code		= KEY_UP,
		.desc		= "Thumbwheel Up",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG8,
		.code		= KEY_DOWN,
		.desc		= "Thumbwheel Down",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG7,
		.code		= KEY_ENTER,
		.desc		= "Thumbwheel Press",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF7,
		.code		= KEY_HOMEPAGE,
		.desc		= "Home",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF6,
		.code		= KEY_CALENDAR,
		.desc		= "Calendar",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF5,
		.code		= KEY_ADDRESSBOOK,
		.desc		= "Contacts",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF4,
		.code		= KEY_MAIL,
		.desc		= "Mail",
		.active_low	= 0,
	},
};

static struct gpio_keys_platform_data n30_button_data = {
	.buttons	= n30_buttons,
	.nbuttons	= ARRAY_SIZE(n30_buttons),
};

static struct platform_device n30_button_device = {
	.name		= "gpio-keys",
	.id		= -1,
	.dev		= {
		.platform_data	= &n30_button_data,
	}
};

static struct gpio_keys_button n35_buttons[] = {
	{
		.gpio		= S3C2410_GPF0,
		.code		= KEY_POWER,
		.desc		= "Power",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG9,
		.code		= KEY_UP,
		.desc		= "Joystick Up",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG8,
		.code		= KEY_DOWN,
		.desc		= "Joystick Down",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG6,
		.code		= KEY_DOWN,
		.desc		= "Joystick Left",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG5,
		.code		= KEY_DOWN,
		.desc		= "Joystick Right",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG7,
		.code		= KEY_ENTER,
		.desc		= "Joystick Press",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF7,
		.code		= KEY_HOMEPAGE,
		.desc		= "Home",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF6,
		.code		= KEY_CALENDAR,
		.desc		= "Calendar",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF5,
		.code		= KEY_ADDRESSBOOK,
		.desc		= "Contacts",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF4,
		.code		= KEY_MAIL,
		.desc		= "Mail",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPF3,
		.code		= SW_RADIO,
		.desc		= "GPS Antenna",
		.active_low	= 0,
	},
	{
		.gpio		= S3C2410_GPG2,
		.code		= SW_HEADPHONE_INSERT,
		.desc		= "Headphone",
		.active_low	= 0,
	},
};

static struct gpio_keys_platform_data n35_button_data = {
	.buttons	= n35_buttons,
	.nbuttons	= ARRAY_SIZE(n35_buttons),
};

static struct platform_device n35_button_device = {
	.name		= "gpio-keys",
	.id		= -1,
	.num_resources	= 0,
	.dev		= {
		.platform_data	= &n35_button_data,
	}
};

/* This is the bluetooth LED on the device. */
static struct s3c24xx_led_platdata n30_blue_led_pdata = {
	.name		= "blue_led",
	.gpio		= S3C2410_GPG6,
	.def_trigger	= "",
};

/* This LED is driven by the battery microcontroller, and is blinking
 * red, blinking green or solid green when the battery is low,
 * charging or full respectively.  By driving GPD9 low, it's possible
 * to force the LED to blink red, so call that warning LED.  */
static struct s3c24xx_led_platdata n30_warning_led_pdata = {
	.name		= "warning_led",
	.flags          = S3C24XX_LEDF_ACTLOW,
	.gpio		= S3C2410_GPD9,
	.def_trigger	= "",
};

static struct platform_device n30_blue_led = {
	.name		= "s3c24xx_led",
	.id		= 1,
	.dev		= {
		.platform_data	= &n30_blue_led_pdata,
	},
};

static struct platform_device n30_warning_led = {
	.name		= "s3c24xx_led",
	.id		= 2,
	.dev		= {
		.platform_data	= &n30_warning_led_pdata,
	},
};

static struct s3c2410fb_display n30_display __initdata = {
	.type		= S3C2410_LCDCON1_TFT,
	.width		= 240,
	.height		= 320,
	.pixclock	= 170000,

	.xres		= 240,
	.yres		= 320,
	.bpp		= 16,
	.left_margin	= 3,
	.right_margin	= 40,
	.hsync_len	= 40,
	.upper_margin	= 2,
	.lower_margin	= 3,
	.vsync_len	= 2,

	.lcdcon5 = S3C2410_LCDCON5_INVVLINE | S3C2410_LCDCON5_INVVFRAME,
};

static struct s3c2410fb_mach_info n30_fb_info __initdata = {
	.displays	= &n30_display,
	.num_displays	= 1,
	.default_display = 0,
	.lpcsel		= 0x06,
};

static struct platform_device *n30_devices[] __initdata = {
	&s3c_device_lcd,
	&s3c_device_wdt,
	&s3c_device_i2c,
	&s3c_device_iis,
	&s3c_device_usb,
	&s3c_device_usbgadget,
	&n30_button_device,
	&n30_blue_led,
	&n30_warning_led,
};

static struct platform_device *n35_devices[] __initdata = {
	&s3c_device_lcd,
	&s3c_device_wdt,
	&s3c_device_i2c,
	&s3c_device_iis,
	&s3c_device_usbgadget,
	&n35_button_device,
};

static struct s3c2410_platform_i2c n30_i2ccfg = {
	.flags		= 0,
	.slave_addr	= 0x10,
	.bus_freq	= 10*1000,
	.max_freq	= 10*1000,
};

/* Lots of hardcoded stuff, but it sets up the hardware in a useful
 * state so that we can boot Linux directly from flash. */
static void __init n30_hwinit(void)
{
	/* GPA0-11 special functions -- unknown what they do
	 * GPA12 N30 special function -- unknown what it does
	 *       N35/PiN output -- unknown what it does
	 *
	 * A12 is nGCS1 on the N30 and an output on the N35/PiN.  I
	 * don't think it does anything useful on the N30, so I ought
	 * to make it an output there too since it always driven to 0
	 * as far as I can tell. */
	if (machine_is_n30())
		__raw_writel(0x007fffff, S3C2410_GPACON);
	if (machine_is_n35())
		__raw_writel(0x007fefff, S3C2410_GPACON);
	__raw_writel(0x00000000, S3C2410_GPADAT);

	/* GPB0 TOUT0 backlight level
	 * GPB1 output 1=backlight on
	 * GPB2 output IrDA enable 0=transceiver enabled, 1=disabled
	 * GPB3 output USB D+ pull up 0=disabled, 1=enabled
	 * GPB4 N30 output -- unknown function
	 *      N30/PiN GPS control 0=GPS enabled, 1=GPS disabled
	 * GPB5 output -- unknown function
	 * GPB6 input -- unknown function
	 * GPB7 output -- unknown function
	 * GPB8 output -- probably LCD driver enable
	 * GPB9 output -- probably LCD VSYNC driver enable
	 * GPB10 output -- probably LCD HSYNC driver enable
	 */
	__raw_writel(0x00154556, S3C2410_GPBCON);
	__raw_writel(0x00000750, S3C2410_GPBDAT);
	__raw_writel(0x00000073, S3C2410_GPBUP);

	/* GPC0 input RS232 DCD/DSR/RI
	 * GPC1 LCD
	 * GPC2 output RS232 DTR?
	 * GPC3 input RS232 DCD/DSR/RI
	 * GPC4 LCD
	 * GPC5 output 0=NAND write enabled, 1=NAND write protect
	 * GPC6 input -- unknown function
	 * GPC7 input charger status 0=charger connected
	 *      this input can be triggered by power on the USB device
	 *      port too, but will go back to disconnected soon after.
	 * GPC8 N30/N35 output -- unknown function, always driven to 1
	 *      PiN input -- unknown function, always read as 1
	 *      Make it an input with a pull up for all models.
	 * GPC9-15 LCD
	 */
	__raw_writel(0xaaa80618, S3C2410_GPCCON);
	__raw_writel(0x0000014c, S3C2410_GPCDAT);
	__raw_writel(0x0000fef2, S3C2410_GPCUP);

	/* GPD0 input -- unknown function
	 * GPD1-D7 LCD
	 * GPD8 N30 output -- unknown function
	 *      N35/PiN output 1=GPS LED on
	 * GPD9 output 0=power led blinks red, 1=normal power led function
	 * GPD10 output -- unknown function
	 * GPD11-15 LCD drivers
	 */
	__raw_writel(0xaa95aaa4, S3C2410_GPDCON);
	__raw_writel(0x00000601, S3C2410_GPDDAT);
	__raw_writel(0x0000fbfe, S3C2410_GPDUP);

	/* GPE0-4 I2S audio bus
	 * GPE5-10 SD/MMC bus
	 * E11-13 outputs -- unknown function, probably power management
	 * E14-15 I2C bus connected to the battery controller
	 */
	__raw_writel(0xa56aaaaa, S3C2410_GPECON);
	__raw_writel(0x0000efc5, S3C2410_GPEDAT);
	__raw_writel(0x0000f81f, S3C2410_GPEUP);

	/* GPF0  input 0=power button pressed
	 * GPF1  input SD/MMC switch 0=card present
	 * GPF2  N30 1=reset button pressed (inverted compared to the rest)
	 *	 N35/PiN 0=reset button pressed
	 * GPF3  N30/PiN input -- unknown function
	 *       N35 input GPS antenna position, 0=antenna closed, 1=open
	 * GPF4  input 0=button 4 pressed
	 * GPF5  input 0=button 3 pressed
	 * GPF6  input 0=button 2 pressed
	 * GPF7  input 0=button 1 pressed
	 */
	__raw_writel(0x0000aaaa, S3C2410_GPFCON);
	__raw_writel(0x00000000, S3C2410_GPFDAT);
	__raw_writel(0x000000ff, S3C2410_GPFUP);

	/* GPG0  input RS232 DCD/DSR/RI
	 * GPG1  input 1=USB gadget port has power from a host
	 * GPG2  N30 input -- unknown function
	 *       N35/PiN input 0=headphones plugged in, 1=not plugged in
	 * GPG3  N30 output -- unknown function
	 *       N35/PiN input with unknown function
	 * GPG4  N30 output 0=MMC enabled, 1=MMC disabled
	 * GPG5  N30 output 0=BlueTooth chip disabled, 1=enabled
	 *       N35/PiN input joystick right
	 * GPG6  N30 output 0=blue led on, 1=off
	 *       N35/PiN input joystick left
	 * GPG7  input 0=thumbwheel pressed
	 * GPG8  input 0=thumbwheel down
	 * GPG9  input 0=thumbwheel up
	 * GPG10 input SD/MMC write protect switch
	 * GPG11 N30 input -- unknown function
	 *       N35 output 0=GPS antenna powered, 1=not powered
	 *       PiN output -- unknown function
	 * GPG12-15 touch screen functions
	 *
	 * The pullups differ between the models, so enable all
	 * pullups that are enabled on any of the models.
	 */
	if (machine_is_n30())
		__raw_writel(0xff0a956a, S3C2410_GPGCON);
	if (machine_is_n35())
		__raw_writel(0xff4aa92a, S3C2410_GPGCON);
	__raw_writel(0x0000e800, S3C2410_GPGDAT);
	__raw_writel(0x0000f86f, S3C2410_GPGUP);

	/* GPH0/1/2/3 RS232 serial port
	 * GPH4/5 IrDA serial port
	 * GPH6/7  N30 BlueTooth serial port
	 *         N35/PiN GPS receiver
	 * GPH8 input -- unknown function
	 * GPH9 CLKOUT0 HCLK -- unknown use
	 * GPH10 CLKOUT1 FCLK -- unknown use
	 *
	 * The pull ups for H6/H7 are enabled on N30 but not on the
	 * N35/PiN.  I suppose is useful for a budget model of the N30
	 * with no bluetooh.  It doesn't hurt to have the pull ups
	 * enabled on the N35, so leave them enabled for all models.
	 */
	__raw_writel(0x0028aaaa, S3C2410_GPHCON);
	__raw_writel(0x000005ef, S3C2410_GPHDAT);
	__raw_writel(0x0000063f, S3C2410_GPHUP);
}

static void __init n30_map_io(void)
{
	s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
	n30_hwinit();
	s3c24xx_init_clocks(0);
	s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
}

static void __init n30_init_irq(void)
{
	s3c24xx_init_irq();
}

/* GPB3 is the line that controls the pull-up for the USB D+ line */

static void __init n30_init(void)
{
	s3c24xx_fb_set_platdata(&n30_fb_info);
	s3c_device_i2c.dev.platform_data = &n30_i2ccfg;
	s3c24xx_udc_set_platdata(&n30_udc_cfg);

	/* Turn off suspend on both USB ports, and switch the
	 * selectable USB port to USB device mode. */

	s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
			      S3C2410_MISCCR_USBSUSPND0 |
			      S3C2410_MISCCR_USBSUSPND1, 0x0);

	if (machine_is_n30()) {
		/* Turn off suspend on both USB ports, and switch the
		 * selectable USB port to USB device mode. */
		s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
				      S3C2410_MISCCR_USBSUSPND0 |
				      S3C2410_MISCCR_USBSUSPND1, 0x0);

		platform_add_devices(n30_devices, ARRAY_SIZE(n30_devices));
	}

	if (machine_is_n35()) {
		/* Turn off suspend and switch the selectable USB port
		 * to USB device mode.  Turn on suspend for the host
		 * port since it is not connected on the N35.
		 *
		 * Actually, the host port is available at some pads
		 * on the back of the device, so it would actually be
		 * possible to add a USB device inside the N35 if you
		 * are willing to do some hardware modifications. */
		s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
				      S3C2410_MISCCR_USBSUSPND0 |
				      S3C2410_MISCCR_USBSUSPND1,
				      S3C2410_MISCCR_USBSUSPND1);

		platform_add_devices(n35_devices, ARRAY_SIZE(n35_devices));
	}
}

MACHINE_START(N30, "Acer-N30")
	/* Maintainer: Christer Weinigel <christer@weinigel.se>,
				Ben Dooks <ben-linux@fluff.org>
	*/
	.phys_io	= S3C2410_PA_UART,
	.io_pg_offst	= (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
	.boot_params	= S3C2410_SDRAM_PA + 0x100,
	.timer		= &s3c24xx_timer,
	.init_machine	= n30_init,
	.init_irq	= n30_init_irq,
	.map_io		= n30_map_io,
MACHINE_END

MACHINE_START(N35, "Acer-N35")
	/* Maintainer: Christer Weinigel <christer@weinigel.se>
	*/
	.phys_io	= S3C2410_PA_UART,
	.io_pg_offst	= (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
	.boot_params	= S3C2410_SDRAM_PA + 0x100,
	.timer		= &s3c24xx_timer,
	.init_machine	= n30_init,
	.init_irq	= n30_init_irq,
	.map_io		= n30_map_io,
MACHINE_END