/*
 * linux/arch/arm/mach-sa1100/hackkit.c
 *
 * Copyright (C) 2002 Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>
 *
 * This file contains all HackKit tweaks. Based on original work from
 * Nicolas Pitre's assabet fixes
 *
 * 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/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/cpufreq.h>
#include <linux/platform_data/sa11x0-serial.h>
#include <linux/serial_core.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/tty.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable.h>

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

#include <mach/hardware.h>
#include <mach/irqs.h>

#include "generic.h"

/**********************************************************************
 *  prototypes
 */

/* init funcs */
static void __init hackkit_map_io(void);

static u_int hackkit_get_mctrl(struct uart_port *port);
static void hackkit_set_mctrl(struct uart_port *port, u_int mctrl);
static void hackkit_uart_pm(struct uart_port *port, u_int state, u_int oldstate);

/**********************************************************************
 *  global data
 */

/**********************************************************************
 *  static data
 */

static struct map_desc hackkit_io_desc[] __initdata = {
        {       /* Flash bank 0 */
                .virtual        =  0xe8000000,
                .pfn            = __phys_to_pfn(0x00000000),
                .length         = 0x01000000,
                .type           = MT_DEVICE
        },
};

static struct sa1100_port_fns hackkit_port_fns __initdata = {
        .set_mctrl      = hackkit_set_mctrl,
        .get_mctrl      = hackkit_get_mctrl,
        .pm             = hackkit_uart_pm,
};

/**********************************************************************
 *  Static functions
 */

static void __init hackkit_map_io(void)
{
        sa1100_map_io();
        iotable_init(hackkit_io_desc, ARRAY_SIZE(hackkit_io_desc));

        sa1100_register_uart_fns(&hackkit_port_fns);
        sa1100_register_uart(0, 1);     /* com port */
        sa1100_register_uart(1, 2);
        sa1100_register_uart(2, 3);     /* radio module */

        Ser1SDCR0 |= SDCR0_SUS;
}

/**
 *      hackkit_uart_pm - powermgmt callback function for system 3 UART
 *      @port: uart port structure
 *      @state: pm state
 *      @oldstate: old pm state
 *
 */
static void hackkit_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
        /* TODO: switch on/off uart in powersave mode */
}

/*
 * Note! this can be called from IRQ context.
 * FIXME: No modem ctrl lines yet.
 */
static void hackkit_set_mctrl(struct uart_port *port, u_int mctrl)
{
#if 0
        if (port->mapbase == _Ser1UTCR0) {
                u_int set = 0, clear = 0;

                if (mctrl & TIOCM_RTS)
                        set |= PT_CTRL2_RS1_RTS;
                else
                        clear |= PT_CTRL2_RS1_RTS;

                if (mctrl & TIOCM_DTR)
                        set |= PT_CTRL2_RS1_DTR;
                else
                        clear |= PT_CTRL2_RS1_DTR;

                PTCTRL2_clear(clear);
                PTCTRL2_set(set);
        }
#endif
}

static u_int hackkit_get_mctrl(struct uart_port *port)
{
        u_int ret = 0;
#if 0
        u_int irqsr = PT_IRQSR;

        /* need 2 reads to read current value */
        irqsr = PT_IRQSR;

        /* TODO: check IRQ source register for modem/com
         status lines and set them correctly. */
#endif

        ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;

        return ret;
}

static struct mtd_partition hackkit_partitions[] = {
        {
                .name           = "BLOB",
                .size           = 0x00040000,
                .offset         = 0x00000000,
                .mask_flags     = MTD_WRITEABLE,  /* force read-only */
        }, {
                .name           = "config",
                .size           = 0x00040000,
                .offset         = MTDPART_OFS_APPEND,
        }, {
                .name           = "kernel",
                .size           = 0x00100000,
                .offset         = MTDPART_OFS_APPEND,
        }, {
                .name           = "initrd",
                .size           = 0x00180000,
                .offset         = MTDPART_OFS_APPEND,
        }, {
                .name           = "rootfs",
                .size           = 0x700000,
                .offset         = MTDPART_OFS_APPEND,
        }, {
                .name           = "data",
                .size           = MTDPART_SIZ_FULL,
                .offset         = MTDPART_OFS_APPEND,
        }
};

static struct flash_platform_data hackkit_flash_data = {
        .map_name       = "cfi_probe",
        .parts          = hackkit_partitions,
        .nr_parts       = ARRAY_SIZE(hackkit_partitions),
};

static struct resource hackkit_flash_resource =
        DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M);

/* LEDs */
struct gpio_led hackkit_gpio_leds[] = {
        {
                .name                   = "hackkit:red",
                .default_trigger        = "cpu0",
                .gpio                   = 22,
        },
        {
                .name                   = "hackkit:green",
                .default_trigger        = "heartbeat",
                .gpio                   = 23,
        },
};

static struct gpio_led_platform_data hackkit_gpio_led_info = {
        .leds           = hackkit_gpio_leds,
        .num_leds       = ARRAY_SIZE(hackkit_gpio_leds),
};

static struct platform_device hackkit_leds = {
        .name   = "leds-gpio",
        .id     = -1,
        .dev    = {
                .platform_data  = &hackkit_gpio_led_info,
        }
};

static void __init hackkit_init(void)
{
        sa11x0_register_mtd(&hackkit_flash_data, &hackkit_flash_resource, 1);
        platform_device_register(&hackkit_leds);
}

/**********************************************************************
 *  Exported Functions
 */

MACHINE_START(HACKKIT, "HackKit Cpu Board")
        .atag_offset    = 0x100,
        .map_io         = hackkit_map_io,
        .nr_irqs        = SA1100_NR_IRQS,
        .init_irq       = sa1100_init_irq,
        .init_time      = sa1100_timer_init,
        .init_machine   = hackkit_init,
        .init_late      = sa11x0_init_late,
        .restart        = sa11x0_restart,
MACHINE_END