hackkit.c

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/*
 * linux/arch/arm/mach-sa1100/hackkit.c
 *
 * Copyright (C) 2002 Stefan Eletzhofer <[email protected]>
 *
 * 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/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 <asm/mach/serial_sa1100.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;
}

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,
    .timer      = &sa1100_timer,
    .init_machine   = hackkit_init,
    .init_late  = sa11x0_init_late,
    .restart    = sa11x0_restart,
MACHINE_END