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n2100.c

/*
 * arch/arm/mach-iop32x/n2100.c
 *
 * Board support code for the Thecus N2100 platform.
 *
 * Author: Rory Bolt <rorybolt@pacbell.net>
 * 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(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 = {
      .swizzle    = pci_std_swizzle,
      .nr_controllers = 1,
      .setup            = iop3xx_pci_setup,
      .preinit    = iop3xx_pci_preinit,
      .scan       = iop3xx_pci_scan_bus,
      .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 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 <buytenh@wantstofly.org> */
      .boot_params      = 0xa0000100,
      .map_io           = n2100_map_io,
      .init_irq   = iop32x_init_irq,
      .timer            = &n2100_timer,
      .init_machine     = n2100_init_machine,
MACHINE_END

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