setup.c

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/*
 * arch/xtensa/platforms/xt2000/setup.c
 *
 * Platform specific functions for the XT2000 board.
 *
 * Authors: Chris Zankel <[email protected]>
 *      Joe Taylor <[email protected]>
 *
 * Copyright 2001 - 2004 Tensilica Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/stringify.h>
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>

#include <asm/processor.h>
#include <asm/platform.h>
#include <asm/bootparam.h>
#include <platform/hardware.h>
#include <platform/serial.h>

/* Assumes s points to an 8-chr string.  No checking for NULL. */

static void led_print (int f, char *s)
{
    unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
    int i;
    for (i = f; i < 8; i++)
        if ((*led_addr++ = *s++) == 0)
            break;
}

void platform_halt(void)
{
    led_print (0, "  HALT  ");
    local_irq_disable();
    while (1);
}

void platform_power_off(void)
{
    led_print (0, "POWEROFF");
    local_irq_disable();
    while (1);
}

void platform_restart(void)
{
    /* Flush and reset the mmu, simulate a processor reset, and
     * jump to the reset vector. */

    __asm__ __volatile__ ("movi a2, 15\n\t"
                  "wsr  a2, icountlevel\n\t"
                  "movi a2, 0\n\t"
                  "wsr  a2, icount\n\t"
                  "wsr  a2, ibreakenable\n\t"
                  "wsr  a2, lcount\n\t"
                  "movi a2, 0x1f\n\t"
                  "wsr  a2, ps\n\t"
                  "isync\n\t"
                  "jx   %0\n\t"
                  :
                  : "a" (XCHAL_RESET_VECTOR_VADDR)
                  : "a2"
                  );

    /* control never gets here */
}

void __init platform_setup(char** cmdline)
{
    led_print (0, "LINUX   ");
}

/* early initialization */

extern sysmem_info_t __initdata sysmem;

void platform_init(bp_tag_t* first)
{
    /* Set default memory block if not provided by the bootloader. */

    if (sysmem.nr_banks == 0) {
        sysmem.nr_banks = 1;
        sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
        sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
                     + PLATFORM_DEFAULT_MEM_SIZE;
    }
}

/* Heartbeat. Let the LED blink. */

void platform_heartbeat(void)
{
    static int i=0, t = 0;

    if (--t < 0)
    {
        t = 59;
        led_print(7, i ? ".": " ");
        i ^= 1;
    }
}

//#define RS_TABLE_SIZE 2
//#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)

#define _SERIAL_PORT(_base,_irq)                    \
{                                   \
    .mapbase    = (_base),                  \
    .membase    = (void*)(_base),               \
    .irq        = (_irq),                   \
    .uartclk    = DUART16552_XTAL_FREQ,             \
    .iotype     = UPIO_MEM,                 \
    .flags      = UPF_BOOT_AUTOCONF,                \
    .regshift   = 2,                        \
}

static struct plat_serial8250_port xt2000_serial_data[] = {
#if XCHAL_HAVE_BE
    _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
    _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
#else
    _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
    _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
#endif
    { }
};

static struct platform_device xt2000_serial8250_device = {
    .name       = "serial8250",
    .id     = PLAT8250_DEV_PLATFORM,
    .dev        = {
        .platform_data = xt2000_serial_data,
    },
};

static struct resource xt2000_sonic_res[] = {
    {
        .start = SONIC83934_ADDR,
        .end   = SONIC83934_ADDR + 0xff,
        .flags = IORESOURCE_MEM,
    },
    {
        .start = SONIC83934_INTNUM,
        .end = SONIC83934_INTNUM,
        .flags = IORESOURCE_IRQ,
    },
};

static struct platform_device xt2000_sonic_device = {
    .name       = "xtsonic",
    .num_resources  = ARRAY_SIZE(xt2000_sonic_res),
    .resource       = xt2000_sonic_res,
};

static int __init xt2000_setup_devinit(void)
{
    platform_device_register(&xt2000_serial8250_device);
    platform_device_register(&xt2000_sonic_device);

    return 0;
}

device_initcall(xt2000_setup_devinit);