/*
 * Hardware definitions for Compaq iPAQ H3xxx Handheld Computers
 *
 * Copyright 2000,1 Compaq Computer Corporation.
 *
 * Use consistent with the GNU GPL is permitted,
 * provided that this copyright notice is
 * preserved in its entirety in all copies and derived works.
 *
 * COMPAQ COMPUTER CORPORATION MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
 * FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 * Author: Jamey Hicks.
 *
 * History:
 *
 * 2001-10-??	Andrew Christian   Added support for iPAQ H3800
 *				   and abstracted EGPIO interface.
 *
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/mfd/htc-egpio.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/serial_core.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>

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

#include <asm/mach/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/irda.h>
#include <asm/mach/map.h>
#include <asm/mach/serial_sa1100.h>

#include <mach/h3600.h>
#include <mach/h3600_gpio.h>

#include "generic.h"

struct gpio_default_state {
	int gpio;
	int mode;
	const char *name;
};

#define GPIO_MODE_IN	-1
#define GPIO_MODE_OUT0	0
#define GPIO_MODE_OUT1	1

static void h3xxx_init_gpio(struct gpio_default_state *s, size_t n)
{
	while (n--) {
		const char *name = s->name;
		int err;

		if (!name)
			name = "[init]";
		err = gpio_request(s->gpio, name);
		if (err) {
			printk(KERN_ERR "gpio%u: unable to request: %d\n",
				s->gpio, err);
			continue;
		}
		if (s->mode >= 0) {
			err = gpio_direction_output(s->gpio, s->mode);
		} else {
			err = gpio_direction_input(s->gpio);
		}
		if (err) {
			printk(KERN_ERR "gpio%u: unable to set direction: %d\n",
				s->gpio, err);
			continue;
		}
		if (!s->name)
			gpio_free(s->gpio);
		s++;
	}
}


/*
 * H3xxx flash support
 */
static struct mtd_partition h3xxx_partitions[] = {
	{
		.name		= "H3XXX boot firmware",
		.size		= 0x00040000,
		.offset		= 0,
		.mask_flags	= MTD_WRITEABLE,  /* force read-only */
	}, {
		.name		= "H3XXX rootfs",
		.size		= MTDPART_SIZ_FULL,
		.offset		= 0x00040000,
	}
};

static void h3xxx_set_vpp(int vpp)
{
	gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp);
}

static int h3xxx_flash_init(void)
{
	int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp");
	if (err)
		return err;

	err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0);
	if (err)
		gpio_free(H3XXX_EGPIO_VPP_ON);

	return err;
}

static void h3xxx_flash_exit(void)
{
	gpio_free(H3XXX_EGPIO_VPP_ON);
}

static struct flash_platform_data h3xxx_flash_data = {
	.map_name	= "cfi_probe",
	.set_vpp	= h3xxx_set_vpp,
	.init		= h3xxx_flash_init,
	.exit		= h3xxx_flash_exit,
	.parts		= h3xxx_partitions,
	.nr_parts	= ARRAY_SIZE(h3xxx_partitions),
};

static struct resource h3xxx_flash_resource = {
	.start		= SA1100_CS0_PHYS,
	.end		= SA1100_CS0_PHYS + SZ_32M - 1,
	.flags		= IORESOURCE_MEM,
};


/*
 * H3xxx uart support
 */
static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl)
{
	if (port->mapbase == _Ser3UTCR0) {
		gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS));
	}
}

static u_int h3xxx_uart_get_mctrl(struct uart_port *port)
{
	u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;

	if (port->mapbase == _Ser3UTCR0) {
		/*
		 * DCD and CTS bits are inverted in GPLR by RS232 transceiver
		 */
		if (gpio_get_value(H3XXX_GPIO_COM_DCD))
			ret &= ~TIOCM_CD;
		if (gpio_get_value(H3XXX_GPIO_COM_CTS))
			ret &= ~TIOCM_CTS;
	}

	return ret;
}

static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
	if (port->mapbase == _Ser3UTCR0)
		if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) {
			gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state);
			gpio_free(H3XXX_EGPIO_RS232_ON);
		}
}

/*
 * Enable/Disable wake up events for this serial port.
 * Obviously, we only support this on the normal COM port.
 */
static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable)
{
	int err = -EINVAL;

	if (port->mapbase == _Ser3UTCR0) {
		if (enable)
			PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
		else
			PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
		err = 0;
	}
	return err;
}

static struct sa1100_port_fns h3xxx_port_fns __initdata = {
	.set_mctrl	= h3xxx_uart_set_mctrl,
	.get_mctrl	= h3xxx_uart_get_mctrl,
	.pm		= h3xxx_uart_pm,
	.set_wake	= h3xxx_uart_set_wake,
};

/*
 * EGPIO
 */

static struct resource egpio_resources[] = {
	[0] = {
		.start	= H3600_EGPIO_PHYS,
		.end	= H3600_EGPIO_PHYS + 0x4 - 1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct htc_egpio_chip egpio_chips[] = {
	[0] = {
		.reg_start	= 0,
		.gpio_base	= H3XXX_EGPIO_BASE,
		.num_gpios	= 16,
		.direction	= HTC_EGPIO_OUTPUT,
		.initial_values	= 0x0080, /* H3XXX_EGPIO_RS232_ON */
	},
};

static struct htc_egpio_platform_data egpio_info = {
	.reg_width	= 16,
	.bus_width	= 16,
	.chip		= egpio_chips,
	.num_chips	= ARRAY_SIZE(egpio_chips),
};

static struct platform_device h3xxx_egpio = {
	.name		= "htc-egpio",
	.id		= -1,
	.resource	= egpio_resources,
	.num_resources	= ARRAY_SIZE(egpio_resources),
	.dev		= {
		.platform_data = &egpio_info,
	},
};

static struct platform_device *h3xxx_devices[] = {
	&h3xxx_egpio,
};

static void __init h3xxx_mach_init(void)
{
	sa1100_register_uart_fns(&h3xxx_port_fns);
	sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1);
	platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices));
}

static struct map_desc h3600_io_desc[] __initdata = {
  	{	/* static memory bank 2  CS#2 */
		.virtual	=  H3600_BANK_2_VIRT,
		.pfn		= __phys_to_pfn(SA1100_CS2_PHYS),
		.length		= 0x02800000,
		.type		= MT_DEVICE
	}, {	/* static memory bank 4  CS#4 */
		.virtual	=  H3600_BANK_4_VIRT,
		.pfn		= __phys_to_pfn(SA1100_CS4_PHYS),
		.length		= 0x00800000,
		.type		= MT_DEVICE
	}, {	/* EGPIO 0		CS#5 */
		.virtual	=  H3600_EGPIO_VIRT,
		.pfn		= __phys_to_pfn(H3600_EGPIO_PHYS),
		.length		= 0x01000000,
		.type		= MT_DEVICE
	}
};

/*
 * Common map_io initialization
 */

static void __init h3xxx_map_io(void)
{
	sa1100_map_io();
	iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));

	sa1100_register_uart(0, 3); /* Common serial port */
//	sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */

	/* Ensure those pins are outputs and driving low  */
	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);

	/* Configure suspend conditions */
	PGSR = 0;
	PWER = PWER_GPIO0;
	PCFR = PCFR_OPDE;
	PSDR = 0;

	GPCR = 0x0fffffff;	/* All outputs are set low by default */
	GPDR = 0;		/* Configure all GPIOs as input */
}

/************************* H3100 *************************/

#ifdef CONFIG_SA1100_H3100

/*
 * helper for sa1100fb
 */
static void h3100_lcd_power(int enable)
{
	if (!gpio_request(H3XXX_EGPIO_LCD_ON, "LCD ON")) {
		gpio_set_value(H3100_GPIO_LCD_3V_ON, enable);
		gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
		gpio_free(H3XXX_EGPIO_LCD_ON);
	}
}


static void __init h3100_map_io(void)
{
	h3xxx_map_io();

	sa1100fb_lcd_power = h3100_lcd_power;

	/* Older bootldrs put GPIO2-9 in alternate mode on the
	   assumption that they are used for video */
	GAFR &= ~0x000001fb;
}

/*
 * This turns the IRDA power on or off on the Compaq H3100
 */
static int h3100_irda_set_power(struct device *dev, unsigned int state)
{
	gpio_set_value(H3100_GPIO_IR_ON, state);
	return 0;
}

static void h3100_irda_set_speed(struct device *dev, unsigned int speed)
{
	gpio_set_value(H3100_GPIO_IR_FSEL, !(speed < 4000000));
}

static struct irda_platform_data h3100_irda_data = {
	.set_power	= h3100_irda_set_power,
	.set_speed	= h3100_irda_set_speed,
};

static struct gpio_default_state h3100_default_gpio[] = {
	{ H3100_GPIO_IR_ON,	GPIO_MODE_OUT0, "IrDA power" },
	{ H3100_GPIO_IR_FSEL,	GPIO_MODE_OUT0, "IrDA fsel" },
	{ H3XXX_GPIO_COM_DCD,	GPIO_MODE_IN,	"COM DCD" },
	{ H3XXX_GPIO_COM_CTS,	GPIO_MODE_IN,	"COM CTS" },
	{ H3XXX_GPIO_COM_RTS,	GPIO_MODE_OUT0,	"COM RTS" },
	{ H3100_GPIO_LCD_3V_ON,	GPIO_MODE_OUT0,	"LCD 3v" },
};

static void __init h3100_mach_init(void)
{
	h3xxx_init_gpio(h3100_default_gpio, ARRAY_SIZE(h3100_default_gpio));
	h3xxx_mach_init();
	sa11x0_register_irda(&h3100_irda_data);
}

MACHINE_START(H3100, "Compaq iPAQ H3100")
	.phys_io	= 0x80000000,
	.io_pg_offst	= ((0xf8000000) >> 18) & 0xfffc,
	.boot_params	= 0xc0000100,
	.map_io		= h3100_map_io,
	.init_irq	= sa1100_init_irq,
	.timer		= &sa1100_timer,
	.init_machine	= h3100_mach_init,
MACHINE_END

#endif /* CONFIG_SA1100_H3100 */

/************************* H3600 *************************/

#ifdef CONFIG_SA1100_H3600

/*
 * helper for sa1100fb
 */
static void h3600_lcd_power(int enable)
{
	if (gpio_request(H3XXX_EGPIO_LCD_ON, "LCD power"))
		goto err1;
	if (gpio_request(H3600_EGPIO_LCD_PCI, "LCD control"))
		goto err2;
	if (gpio_request(H3600_EGPIO_LCD_5V_ON, "LCD 5v"))
		goto err3;
	if (gpio_request(H3600_EGPIO_LVDD_ON, "LCD 9v/-6.5v"))
		goto err4;

	gpio_direction_output(H3XXX_EGPIO_LCD_ON, enable);
	gpio_direction_output(H3600_EGPIO_LCD_PCI, enable);
	gpio_direction_output(H3600_EGPIO_LCD_5V_ON, enable);
	gpio_direction_output(H3600_EGPIO_LVDD_ON, enable);

	gpio_free(H3600_EGPIO_LVDD_ON);
err4:	gpio_free(H3600_EGPIO_LCD_5V_ON);
err3:	gpio_free(H3600_EGPIO_LCD_PCI);
err2:	gpio_free(H3XXX_EGPIO_LCD_ON);
err1:	return;
}

static void __init h3600_map_io(void)
{
	h3xxx_map_io();

	sa1100fb_lcd_power = h3600_lcd_power;
}

/*
 * This turns the IRDA power on or off on the Compaq H3600
 */
static int h3600_irda_set_power(struct device *dev, unsigned int state)
{
	gpio_set_value(H3600_EGPIO_IR_ON, state);
	return 0;
}

static void h3600_irda_set_speed(struct device *dev, unsigned int speed)
{
	gpio_set_value(H3600_EGPIO_IR_FSEL, !(speed < 4000000));
}

static int h3600_irda_startup(struct device *dev)
{
	int err = gpio_request(H3600_EGPIO_IR_ON, "IrDA power");
	if (err)
		goto err1;
	err = gpio_direction_output(H3600_EGPIO_IR_ON, 0);
	if (err)
		goto err2;
	err = gpio_request(H3600_EGPIO_IR_FSEL, "IrDA fsel");
	if (err)
		goto err2;
	err = gpio_direction_output(H3600_EGPIO_IR_FSEL, 0);
	if (err)
		goto err3;
	return 0;

err3:	gpio_free(H3600_EGPIO_IR_FSEL);
err2:	gpio_free(H3600_EGPIO_IR_ON);
err1:	return err;
}

static void h3600_irda_shutdown(struct device *dev)
{
	gpio_free(H3600_EGPIO_IR_ON);
	gpio_free(H3600_EGPIO_IR_FSEL);
}

static struct irda_platform_data h3600_irda_data = {
	.set_power	= h3600_irda_set_power,
	.set_speed	= h3600_irda_set_speed,
	.startup	= h3600_irda_startup,
	.shutdown	= h3600_irda_shutdown,
};

static struct gpio_default_state h3600_default_gpio[] = {
	{ H3XXX_GPIO_COM_DCD,	GPIO_MODE_IN,	"COM DCD" },
	{ H3XXX_GPIO_COM_CTS,	GPIO_MODE_IN,	"COM CTS" },
	{ H3XXX_GPIO_COM_RTS,	GPIO_MODE_OUT0,	"COM RTS" },
};

static void __init h3600_mach_init(void)
{
	h3xxx_init_gpio(h3600_default_gpio, ARRAY_SIZE(h3600_default_gpio));
	h3xxx_mach_init();
	sa11x0_register_irda(&h3600_irda_data);
}

MACHINE_START(H3600, "Compaq iPAQ H3600")
	.phys_io	= 0x80000000,
	.io_pg_offst	= ((0xf8000000) >> 18) & 0xfffc,
	.boot_params	= 0xc0000100,
	.map_io		= h3600_map_io,
	.init_irq	= sa1100_init_irq,
	.timer		= &sa1100_timer,
	.init_machine	= h3600_mach_init,
MACHINE_END

#endif /* CONFIG_SA1100_H3600 */