n2100.c

Go to the documentation of this file.

/*
 * arch/arm/mach-iop32x/n2100.c
 *
 * Board support code for the Thecus N2100 platform.
 *
 * Author: Rory Bolt <[email protected]>
 * Copyright (C) 2002 Rory Bolt
 * Copyright 2003 (c) MontaVista, Software, Inc.
 * Copyright (C) 2004 Intel Corp.
 *
 * 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/mm.h>
#include <linux/init.h>
#include <linux/f75375s.h>
#include <linux/leds-pca9532.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/string.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <mach/time.h>

/*
 * N2100 timer tick configuration.
 */
static void __init n2100_timer_init(void)
{
    /* 33.000 MHz crystal.  */
    iop_init_time(198000000);
}

static struct sys_timer n2100_timer = {
    .init       = n2100_timer_init,
};


/*
 * N2100 I/O.
 */
static struct map_desc n2100_io_desc[] __initdata = {
    {   /* on-board devices */
        .virtual    = N2100_UART,
        .pfn        = __phys_to_pfn(N2100_UART),
        .length     = 0x00100000,
        .type       = MT_DEVICE
    },
};

void __init n2100_map_io(void)
{
    iop3xx_map_io();
    iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
}


/*
 * N2100 PCI.
 */
static int __init
n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
    int irq;

    if (PCI_SLOT(dev->devfn) == 1) {
        /* RTL8110SB #1 */
        irq = IRQ_IOP32X_XINT0;
    } else if (PCI_SLOT(dev->devfn) == 2) {
        /* RTL8110SB #2 */
        irq = IRQ_IOP32X_XINT3;
    } else if (PCI_SLOT(dev->devfn) == 3) {
        /* Sil3512 */
        irq = IRQ_IOP32X_XINT2;
    } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
        /* VT6212 INTA */
        irq = IRQ_IOP32X_XINT1;
    } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
        /* VT6212 INTB */
        irq = IRQ_IOP32X_XINT0;
    } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
        /* VT6212 INTC */
        irq = IRQ_IOP32X_XINT2;
    } else if (PCI_SLOT(dev->devfn) == 5) {
        /* Mini-PCI slot */
        irq = IRQ_IOP32X_XINT3;
    } else {
        printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
            "device PCI:%d:%d:%d\n", dev->bus->number,
            PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
        irq = -1;
    }

    return irq;
}

static struct hw_pci n2100_pci __initdata = {
    .nr_controllers = 1,
    .ops        = &iop3xx_ops,
    .setup      = iop3xx_pci_setup,
    .preinit    = iop3xx_pci_preinit,
    .map_irq    = n2100_pci_map_irq,
};

/*
 * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
 * the ->broken_parity_status flag for both ports so that the r8169
 * driver knows it should ignore error interrupts.
 */
static void n2100_fixup_r8169(struct pci_dev *dev)
{
    if (dev->bus->number == 0 &&
        (dev->devfn == PCI_DEVFN(1, 0) ||
         dev->devfn == PCI_DEVFN(2, 0)))
        dev->broken_parity_status = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);

static int __init n2100_pci_init(void)
{
    if (machine_is_n2100())
        pci_common_init(&n2100_pci);

    return 0;
}

subsys_initcall(n2100_pci_init);


/*
 * N2100 machine initialisation.
 */
static struct physmap_flash_data n2100_flash_data = {
    .width      = 2,
};

static struct resource n2100_flash_resource = {
    .start      = 0xf0000000,
    .end        = 0xf0ffffff,
    .flags      = IORESOURCE_MEM,
};

static struct platform_device n2100_flash_device = {
    .name       = "physmap-flash",
    .id     = 0,
    .dev        = {
        .platform_data  = &n2100_flash_data,
    },
    .num_resources  = 1,
    .resource   = &n2100_flash_resource,
};


static struct plat_serial8250_port n2100_serial_port[] = {
    {
        .mapbase    = N2100_UART,
        .membase    = (char *)N2100_UART,
        .irq        = 0,
        .flags      = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ,
        .iotype     = UPIO_MEM,
        .regshift   = 0,
        .uartclk    = 1843200,
    },
    { },
};

static struct resource n2100_uart_resource = {
    .start      = N2100_UART,
    .end        = N2100_UART + 7,
    .flags      = IORESOURCE_MEM,
};

static struct platform_device n2100_serial_device = {
    .name       = "serial8250",
    .id     = PLAT8250_DEV_PLATFORM,
    .dev        = {
        .platform_data      = n2100_serial_port,
    },
    .num_resources  = 1,
    .resource   = &n2100_uart_resource,
};

static struct f75375s_platform_data n2100_f75375s = {
    .pwm        = { 255, 255 },
    .pwm_enable = { 0, 0 },
};

static struct pca9532_platform_data n2100_leds = {
    .leds = {
    {   .name = "n2100:red:satafail0",
        .state = PCA9532_OFF,
        .type = PCA9532_TYPE_LED,
    },
    {   .name = "n2100:red:satafail1",
        .state = PCA9532_OFF,
        .type = PCA9532_TYPE_LED,
    },
    {   .name = "n2100:blue:usb",
        .state = PCA9532_OFF,
        .type = PCA9532_TYPE_LED,
    },
    {   .type = PCA9532_TYPE_NONE },

    {   .type = PCA9532_TYPE_NONE },
    {   .type = PCA9532_TYPE_NONE },
    {   .type = PCA9532_TYPE_NONE },
    {   .name = "n2100:red:usb",
        .state = PCA9532_OFF,
        .type = PCA9532_TYPE_LED,
    },

    {   .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
    {   .type = PCA9532_TYPE_NONE }, /* reset gpio */
    {   .type = PCA9532_TYPE_NONE },
    {   .type = PCA9532_TYPE_NONE },

    {   .type = PCA9532_TYPE_NONE },
    {   .name = "n2100:orange:system",
        .state = PCA9532_OFF,
        .type = PCA9532_TYPE_LED,
    },
    {   .name = "n2100:red:system",
        .state = PCA9532_OFF,
        .type = PCA9532_TYPE_LED,
    },
    {   .name = "N2100 beeper"  ,
        .state =  PCA9532_OFF,
        .type = PCA9532_TYPE_N2100_BEEP,
    },
    },
    .psc = { 0, 0 },
    .pwm = { 0, 0 },
};

static struct i2c_board_info __initdata n2100_i2c_devices[] = {
    {
        I2C_BOARD_INFO("rs5c372b", 0x32),
    },
    {
        I2C_BOARD_INFO("f75375", 0x2e),
        .platform_data = &n2100_f75375s,
    },
    {
        I2C_BOARD_INFO("pca9532", 0x60),
        .platform_data = &n2100_leds,
    },
};

/*
 * Pull PCA9532 GPIO #8 low to power off the machine.
 */
static void n2100_power_off(void)
{
    local_irq_disable();

    /* Start condition, I2C address of PCA9532, write transaction.  */
    *IOP3XX_IDBR0 = 0xc0;
    *IOP3XX_ICR0 = 0xe9;
    mdelay(1);

    /* Write address 0x08.  */
    *IOP3XX_IDBR0 = 0x08;
    *IOP3XX_ICR0 = 0xe8;
    mdelay(1);

    /* Write data 0x01, stop condition.  */
    *IOP3XX_IDBR0 = 0x01;
    *IOP3XX_ICR0 = 0xea;

    while (1)
        ;
}

static void n2100_restart(char mode, const char *cmd)
{
    gpio_line_set(N2100_HARDWARE_RESET, GPIO_LOW);
    gpio_line_config(N2100_HARDWARE_RESET, GPIO_OUT);
    while (1)
        ;
}


static struct timer_list power_button_poll_timer;

static void power_button_poll(unsigned long dummy)
{
    if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
        ctrl_alt_del();
        return;
    }

    power_button_poll_timer.expires = jiffies + (HZ / 10);
    add_timer(&power_button_poll_timer);
}


static void __init n2100_init_machine(void)
{
    platform_device_register(&iop3xx_i2c0_device);
    platform_device_register(&n2100_flash_device);
    platform_device_register(&n2100_serial_device);
    platform_device_register(&iop3xx_dma_0_channel);
    platform_device_register(&iop3xx_dma_1_channel);

    i2c_register_board_info(0, n2100_i2c_devices,
        ARRAY_SIZE(n2100_i2c_devices));

    pm_power_off = n2100_power_off;

    init_timer(&power_button_poll_timer);
    power_button_poll_timer.function = power_button_poll;
    power_button_poll_timer.expires = jiffies + (HZ / 10);
    add_timer(&power_button_poll_timer);
}

MACHINE_START(N2100, "Thecus N2100")
    /* Maintainer: Lennert Buytenhek <[email protected]> */
    .atag_offset    = 0x100,
    .map_io     = n2100_map_io,
    .init_irq   = iop32x_init_irq,
    .timer      = &n2100_timer,
    .init_machine   = n2100_init_machine,
    .restart    = n2100_restart,
MACHINE_END