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board-voiceblue.c

/*
 * linux/arch/arm/mach-omap1/board-voiceblue.c
 *
 * Modified from board-generic.c
 *
 * Copyright (C) 2004 2N Telekomunikace, Ladislav Michl <michl@2n.cz>
 *
 * Code for OMAP5910 based VoiceBlue board (VoIP to GSM gateway).
 *
 * 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/delay.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/irq.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>

#include <mach/common.h>
#include <mach/gpio.h>
#include <mach/mux.h>
#include <mach/tc.h>
#include <mach/usb.h>

static struct plat_serial8250_port voiceblue_ports[] = {
      {
            .mapbase    = (unsigned long)(OMAP_CS1_PHYS + 0x40000),
            .irq        = OMAP_GPIO_IRQ(12),
            .flags            = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .iotype           = UPIO_MEM,
            .regshift   = 1,
            .uartclk    = 3686400,
      },
      {
            .mapbase    = (unsigned long)(OMAP_CS1_PHYS + 0x50000),
            .irq        = OMAP_GPIO_IRQ(13),
            .flags            = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .iotype           = UPIO_MEM,
            .regshift   = 1,
            .uartclk    = 3686400,
      },
      {
            .mapbase    = (unsigned long)(OMAP_CS1_PHYS + 0x60000),
            .irq        = OMAP_GPIO_IRQ(14),
            .flags            = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .iotype           = UPIO_MEM,
            .regshift   = 1,
            .uartclk    = 3686400,
      },
      {
            .mapbase    = (unsigned long)(OMAP_CS1_PHYS + 0x70000),
            .irq        = OMAP_GPIO_IRQ(15),
            .flags            = UPF_BOOT_AUTOCONF | UPF_IOREMAP,
            .iotype           = UPIO_MEM,
            .regshift   = 1,
            .uartclk    = 3686400,
      },
      { },
};

static struct platform_device serial_device = {
      .name             = "serial8250",
      .id               = PLAT8250_DEV_PLATFORM1,
      .dev              = {
            .platform_data    = voiceblue_ports,
      },
};

static int __init ext_uart_init(void)
{
      return platform_device_register(&serial_device);
}
arch_initcall(ext_uart_init);

static struct flash_platform_data voiceblue_flash_data = {
      .map_name   = "cfi_probe",
      .width            = 2,
};

static struct resource voiceblue_flash_resource = {
      .start      = OMAP_CS0_PHYS,
      .end  = OMAP_CS0_PHYS + SZ_32M - 1,
      .flags      = IORESOURCE_MEM,
};

static struct platform_device voiceblue_flash_device = {
      .name       = "omapflash",
      .id         = 0,
      .dev        = {
            .platform_data    = &voiceblue_flash_data,
      },
      .num_resources    = 1,
      .resource   = &voiceblue_flash_resource,
};

static struct resource voiceblue_smc91x_resources[] = {
      [0] = {
            .start      = OMAP_CS2_PHYS + 0x300,
            .end  = OMAP_CS2_PHYS + 0x300 + 16,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = OMAP_GPIO_IRQ(8),
            .end  = OMAP_GPIO_IRQ(8),
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
      },
};

static struct platform_device voiceblue_smc91x_device = {
      .name       = "smc91x",
      .id         = 0,
      .num_resources    = ARRAY_SIZE(voiceblue_smc91x_resources),
      .resource   = voiceblue_smc91x_resources,
};

static struct platform_device *voiceblue_devices[] __initdata = {
      &voiceblue_flash_device,
      &voiceblue_smc91x_device,
};

static struct omap_usb_config voiceblue_usb_config __initdata = {
      .hmc_mode   = 3,
      .register_host    = 1,
      .register_dev   = 1,
      .pins[0]    = 2,
      .pins[1]    = 6,
      .pins[2]    = 6,
};

static struct omap_mmc_config voiceblue_mmc_config __initdata = {
      .mmc[0] = {
            .enabled    = 1,
            .power_pin  = 2,
            .switch_pin = -1,
      },
};

static struct omap_uart_config voiceblue_uart_config __initdata = {
      .enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
};

static struct omap_board_config_kernel voiceblue_config[] = {
      { OMAP_TAG_USB,  &voiceblue_usb_config },
      { OMAP_TAG_MMC,  &voiceblue_mmc_config },
      { OMAP_TAG_UART, &voiceblue_uart_config },
};

static void __init voiceblue_init_irq(void)
{
      omap1_init_common_hw();
      omap_init_irq();
      omap_gpio_init();
}

static void __init voiceblue_init(void)
{
      /* Watchdog */
      omap_request_gpio(0);
      /* smc91x reset */
      omap_request_gpio(7);
      omap_set_gpio_direction(7, 0);
      omap_set_gpio_dataout(7, 1);
      udelay(2);  /* wait at least 100ns */
      omap_set_gpio_dataout(7, 0);
      mdelay(50); /* 50ms until PHY ready */
      /* smc91x interrupt pin */
      omap_request_gpio(8);
      /* 16C554 reset*/
      omap_request_gpio(6);
      omap_set_gpio_direction(6, 0);
      omap_set_gpio_dataout(6, 0);
      /* 16C554 interrupt pins */
      omap_request_gpio(12);
      omap_request_gpio(13);
      omap_request_gpio(14);
      omap_request_gpio(15);
      set_irq_type(OMAP_GPIO_IRQ(12), IRQ_TYPE_EDGE_RISING);
      set_irq_type(OMAP_GPIO_IRQ(13), IRQ_TYPE_EDGE_RISING);
      set_irq_type(OMAP_GPIO_IRQ(14), IRQ_TYPE_EDGE_RISING);
      set_irq_type(OMAP_GPIO_IRQ(15), IRQ_TYPE_EDGE_RISING);

      platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
      omap_board_config = voiceblue_config;
      omap_board_config_size = ARRAY_SIZE(voiceblue_config);
      omap_serial_init();
      omap_register_i2c_bus(1, 100, NULL, 0);

      /* There is a good chance board is going up, so enable power LED
       * (it is connected through invertor) */
      omap_writeb(0x00, OMAP_LPG1_LCR);
      omap_writeb(0x00, OMAP_LPG1_PMR);   /* Disable clock */
}

static void __init voiceblue_map_io(void)
{
      omap1_map_common_io();
}

#define MACHINE_PANICED       1
#define MACHINE_REBOOTING     2
#define MACHINE_REBOOT        4
static unsigned long machine_state;

static int panic_event(struct notifier_block *this, unsigned long event,
       void *ptr)
{
      if (test_and_set_bit(MACHINE_PANICED, &machine_state))
            return NOTIFY_DONE;

      /* Flash power LED */
      omap_writeb(0x78, OMAP_LPG1_LCR);
      omap_writeb(0x01, OMAP_LPG1_PMR);   /* Enable clock */

      return NOTIFY_DONE;
}

static struct notifier_block panic_block = {
      .notifier_call    = panic_event,
};

static int __init voiceblue_setup(void)
{
      /* Setup panic notifier */
      atomic_notifier_chain_register(&panic_notifier_list, &panic_block);

      return 0;
}
postcore_initcall(voiceblue_setup);

static int wdt_gpio_state;

void voiceblue_wdt_enable(void)
{
      omap_set_gpio_direction(0, 0);
      omap_set_gpio_dataout(0, 0);
      omap_set_gpio_dataout(0, 1);
      omap_set_gpio_dataout(0, 0);
      wdt_gpio_state = 0;
}

void voiceblue_wdt_disable(void)
{
      omap_set_gpio_dataout(0, 0);
      omap_set_gpio_dataout(0, 1);
      omap_set_gpio_dataout(0, 0);
      omap_set_gpio_direction(0, 1);
}

void voiceblue_wdt_ping(void)
{
      if (test_bit(MACHINE_REBOOT, &machine_state))
            return;

      wdt_gpio_state = !wdt_gpio_state;
      omap_set_gpio_dataout(0, wdt_gpio_state);
}

void voiceblue_reset(void)
{
      set_bit(MACHINE_REBOOT, &machine_state);
      voiceblue_wdt_enable();
      while (1) ;
}

EXPORT_SYMBOL(voiceblue_wdt_enable);
EXPORT_SYMBOL(voiceblue_wdt_disable);
EXPORT_SYMBOL(voiceblue_wdt_ping);

MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
      /* Maintainer: Ladislav Michl <michl@2n.cz> */
      .phys_io    = 0xfff00000,
      .io_pg_offst      = ((0xfef00000) >> 18) & 0xfffc,
      .boot_params      = 0x10000100,
      .map_io           = voiceblue_map_io,
      .init_irq   = voiceblue_init_irq,
      .init_machine     = voiceblue_init,
      .timer            = &omap_timer,
MACHINE_END

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