badge4.c

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/*
 * linux/arch/arm/mach-sa1100/badge4.c
 *
 * BadgePAD 4 specific initialization
 *
 *   Tim Connors <[email protected]>
 *   Christopher Hoover <[email protected]>
 *
 * Copyright (C) 2002 Hewlett-Packard Company
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/tty.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/leds.h>

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

#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <asm/hardware/sa1111.h>
#include <asm/mach/serial_sa1100.h>

#include <mach/badge4.h>

#include "generic.h"

static struct resource sa1111_resources[] = {
    [0] = DEFINE_RES_MEM(BADGE4_SA1111_BASE, 0x2000),
    [1] = DEFINE_RES_IRQ(BADGE4_IRQ_GPIO_SA1111),
};

static int badge4_sa1111_enable(void *data, unsigned devid)
{
    if (devid == SA1111_DEVID_USB)
        badge4_set_5V(BADGE4_5V_USB, 1);
    return 0;
}

static void badge4_sa1111_disable(void *data, unsigned devid)
{
    if (devid == SA1111_DEVID_USB)
        badge4_set_5V(BADGE4_5V_USB, 0);
}

static struct sa1111_platform_data sa1111_info = {
    .disable_devs   = SA1111_DEVID_PS2_MSE,
    .enable     = badge4_sa1111_enable,
    .disable    = badge4_sa1111_disable,
};

static u64 sa1111_dmamask = 0xffffffffUL;

static struct platform_device sa1111_device = {
    .name       = "sa1111",
    .id     = 0,
    .dev        = {
        .dma_mask = &sa1111_dmamask,
        .coherent_dma_mask = 0xffffffff,
        .platform_data = &sa1111_info,
    },
    .num_resources  = ARRAY_SIZE(sa1111_resources),
    .resource   = sa1111_resources,
};

/* LEDs */
struct gpio_led badge4_gpio_leds[] = {
    {
        .name           = "badge4:red",
        .default_trigger    = "heartbeat",
        .gpio           = 7,
    },
    {
        .name           = "badge4:green",
        .default_trigger    = "cpu0",
        .gpio           = 9,
    },
};

static struct gpio_led_platform_data badge4_gpio_led_info = {
    .leds       = badge4_gpio_leds,
    .num_leds   = ARRAY_SIZE(badge4_gpio_leds),
};

static struct platform_device badge4_leds = {
    .name   = "leds-gpio",
    .id = -1,
    .dev    = {
        .platform_data  = &badge4_gpio_led_info,
    }
};

static struct platform_device *devices[] __initdata = {
    &sa1111_device,
    &badge4_leds,
};

static int __init badge4_sa1111_init(void)
{
    /*
     * Ensure that the memory bus request/grant signals are setup,
     * and the grant is held in its inactive state
     */
    sa1110_mb_disable();

    /*
     * Probe for SA1111.
     */
    return platform_add_devices(devices, ARRAY_SIZE(devices));
}


/*
 * 1 x Intel 28F320C3 Advanced+ Boot Block Flash (32 Mi bit)
 *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
 *   Sixty-three 32 KiW Main Blocks (4032 Ki b)
 *
 * <or>
 *
 * 1 x Intel 28F640C3 Advanced+ Boot Block Flash (64 Mi bit)
 *   Eight 4 KiW Parameter Bottom Blocks (64 KiB)
 *   One-hundred-twenty-seven 32 KiW Main Blocks (8128 Ki b)
 */
static struct mtd_partition badge4_partitions[] = {
    {
        .name   = "BLOB boot loader",
        .offset = 0,
        .size   = 0x0000A000
    }, {
        .name   = "params",
        .offset = MTDPART_OFS_APPEND,
        .size   = 0x00006000
    }, {
        .name   = "root",
        .offset = MTDPART_OFS_APPEND,
        .size   = MTDPART_SIZ_FULL
    }
};

static struct flash_platform_data badge4_flash_data = {
    .map_name   = "cfi_probe",
    .parts      = badge4_partitions,
    .nr_parts   = ARRAY_SIZE(badge4_partitions),
};

static struct resource badge4_flash_resource =
    DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_64M);

static int five_v_on __initdata = 0;

static int __init five_v_on_setup(char *ignore)
{
    five_v_on = 1;
    return 1;
}
__setup("five_v_on", five_v_on_setup);


static int __init badge4_init(void)
{
    int ret;

    if (!machine_is_badge4())
        return -ENODEV;

    /* LCD */
    GPCR  = (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
         BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
         BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
         BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
         BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
         BADGE4_GPIO_GPC_VID);
    GPDR &= ~BADGE4_GPIO_INT_VID;
    GPDR |= (BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
         BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 |
         BADGE4_GPIO_LGP6 | BADGE4_GPIO_LGP7 |
         BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
         BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
         BADGE4_GPIO_GPC_VID);

    /* SDRAM SPD i2c */
    GPCR  = (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
    GPDR |= (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);

    /* uart */
    GPCR  = (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
    GPDR |= (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);

    /* CPLD muxsel0 input for mux/adc chip select */
    GPCR  = BADGE4_GPIO_MUXSEL0;
    GPDR |= BADGE4_GPIO_MUXSEL0;

    /* test points: J5, J6 as inputs, J7 outputs */
    GPDR &= ~(BADGE4_GPIO_TESTPT_J5 | BADGE4_GPIO_TESTPT_J6);
    GPCR  = BADGE4_GPIO_TESTPT_J7;
    GPDR |= BADGE4_GPIO_TESTPT_J7;

    /* 5V supply rail. */
    GPCR  = BADGE4_GPIO_PCMEN5V;        /* initially off */
    GPDR |= BADGE4_GPIO_PCMEN5V;

    /* CPLD sdram type inputs; set up by blob */
    //GPDR |= (BADGE4_GPIO_SDTYP1 | BADGE4_GPIO_SDTYP0);
    printk(KERN_DEBUG __FILE__ ": SDRAM CPLD typ1=%d typ0=%d\n",
        !!(GPLR & BADGE4_GPIO_SDTYP1),
        !!(GPLR & BADGE4_GPIO_SDTYP0));

    /* SA1111 reset pin; set up by blob */
    //GPSR  = BADGE4_GPIO_SA1111_NRST;
    //GPDR |= BADGE4_GPIO_SA1111_NRST;


    /* power management cruft */
    PGSR = 0;
    PWER = 0;
    PCFR = 0;
    PSDR = 0;

    PWER |= PWER_GPIO26;    /* wake up on an edge from TESTPT_J5 */
    PWER |= PWER_RTC;   /* wake up if rtc fires */

    /* drive sa1111_nrst during sleep */
    PGSR |= BADGE4_GPIO_SA1111_NRST;
    /* drive CPLD as is during sleep */
    PGSR |= (GPLR & (BADGE4_GPIO_SDTYP0|BADGE4_GPIO_SDTYP1));


    /* Now bring up the SA-1111. */
    ret = badge4_sa1111_init();
    if (ret < 0)
        printk(KERN_ERR
            "%s: SA-1111 initialization failed (%d)\n",
            __func__, ret);


    /* maybe turn on 5v0 from the start */
    badge4_set_5V(BADGE4_5V_INITIALLY, five_v_on);

    sa11x0_register_mtd(&badge4_flash_data, &badge4_flash_resource, 1);

    return 0;
}

arch_initcall(badge4_init);


static unsigned badge4_5V_bitmap = 0;

void badge4_set_5V(unsigned subsystem, int on)
{
    unsigned long flags;
    unsigned old_5V_bitmap;

    local_irq_save(flags);

    old_5V_bitmap = badge4_5V_bitmap;

    if (on) {
        badge4_5V_bitmap |= subsystem;
    } else {
        badge4_5V_bitmap &= ~subsystem;
    }

    /* detect on->off and off->on transitions */
    if ((!old_5V_bitmap) && (badge4_5V_bitmap)) {
        /* was off, now on */
        printk(KERN_INFO "%s: enabling 5V supply rail\n", __func__);
        GPSR = BADGE4_GPIO_PCMEN5V;
    } else if ((old_5V_bitmap) && (!badge4_5V_bitmap)) {
        /* was on, now off */
        printk(KERN_INFO "%s: disabling 5V supply rail\n", __func__);
        GPCR = BADGE4_GPIO_PCMEN5V;
    }

    local_irq_restore(flags);
}
EXPORT_SYMBOL(badge4_set_5V);


static struct map_desc badge4_io_desc[] __initdata = {
    {   /* SRAM  bank 1 */
        .virtual    = 0xf1000000,
        .pfn        = __phys_to_pfn(0x08000000),
        .length     = 0x00100000,
        .type       = MT_DEVICE
    }, {    /* SRAM  bank 2 */
        .virtual    = 0xf2000000,
        .pfn        = __phys_to_pfn(0x10000000),
        .length     = 0x00100000,
        .type       = MT_DEVICE
    }
};

static void
badge4_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
    if (!state) {
        Ser1SDCR0 |= SDCR0_UART;
    }
}

static struct sa1100_port_fns badge4_port_fns __initdata = {
    //.get_mctrl    = badge4_get_mctrl,
    //.set_mctrl    = badge4_set_mctrl,
    .pm     = badge4_uart_pm,
};

static void __init badge4_map_io(void)
{
    sa1100_map_io();
    iotable_init(badge4_io_desc, ARRAY_SIZE(badge4_io_desc));

    sa1100_register_uart_fns(&badge4_port_fns);
    sa1100_register_uart(0, 3);
    sa1100_register_uart(1, 1);
}

MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
    .atag_offset    = 0x100,
    .map_io     = badge4_map_io,
    .nr_irqs    = SA1100_NR_IRQS,
    .init_irq   = sa1100_init_irq,
    .init_late  = sa11x0_init_late,
    .timer      = &sa1100_timer,
#ifdef CONFIG_SA1111
    .dma_zone_size  = SZ_1M,
#endif
    .restart    = sa11x0_restart,
MACHINE_END