board-voiceblue.c

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/*
 * linux/arch/arm/mach-omap1/board-voiceblue.c
 *
 * Modified from board-generic.c
 *
 * Copyright (C) 2004 2N Telekomunikace, Ladislav Michl <[email protected]>
 *
 * 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/gpio.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mtd/physmap.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <linux/smc91x.h>
#include <linux/export.h>

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

#include <mach/board-voiceblue.h>
#include <mach/flash.h>
#include <mach/mux.h>
#include <plat/tc.h>

#include <mach/hardware.h>
#include <mach/usb.h>

#include "common.h"

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

static int __init ext_uart_init(void)
{
    if (!machine_is_voiceblue())
        return -ENODEV;

    voiceblue_ports[0].irq = gpio_to_irq(12);
    voiceblue_ports[1].irq = gpio_to_irq(13);
    voiceblue_ports[2].irq = gpio_to_irq(14);
    voiceblue_ports[3].irq = gpio_to_irq(15);
    serial_device.dev.platform_data = voiceblue_ports;
    return platform_device_register(&serial_device);
}
arch_initcall(ext_uart_init);

static struct physmap_flash_data voiceblue_flash_data = {
    .width      = 2,
    .set_vpp    = omap1_set_vpp,
};

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       = "physmap-flash",
    .id     = 0,
    .dev        = {
        .platform_data  = &voiceblue_flash_data,
    },
    .num_resources  = 1,
    .resource   = &voiceblue_flash_resource,
};

static struct smc91x_platdata voiceblue_smc91x_info = {
    .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
    .leda   = RPC_LED_100_10,
    .ledb   = RPC_LED_TX_RX,
};

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

static struct platform_device voiceblue_smc91x_device = {
    .name       = "smc91x",
    .id     = 0,
    .dev    = {
        .platform_data  = &voiceblue_smc91x_info,
    },
    .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,
};

#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)
{
    if (!machine_is_voiceblue())
        return -ENODEV;

    /* 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)
{
    gpio_direction_output(0, 0);
    gpio_set_value(0, 1);
    gpio_set_value(0, 0);
    wdt_gpio_state = 0;
}

void voiceblue_wdt_disable(void)
{
    gpio_set_value(0, 0);
    gpio_set_value(0, 1);
    gpio_set_value(0, 0);
    gpio_direction_input(0);
}

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

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

static void voiceblue_restart(char mode, const char *cmd)
{
    /*
     * Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
     * "Global Software Reset Affects Traffic Controller Frequency".
     */
    if (cpu_is_omap5912()) {
        omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4), DPLL_CTL);
        omap_writew(0x8, ARM_RSTCT1);
    }

    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);

static void __init voiceblue_init(void)
{
    /* mux pins for uarts */
    omap_cfg_reg(UART1_TX);
    omap_cfg_reg(UART1_RTS);
    omap_cfg_reg(UART2_TX);
    omap_cfg_reg(UART2_RTS);
    omap_cfg_reg(UART3_TX);
    omap_cfg_reg(UART3_RX);

    /* Watchdog */
    gpio_request(0, "Watchdog");
    /* smc91x reset */
    gpio_request(7, "SMC91x reset");
    gpio_direction_output(7, 1);
    udelay(2);  /* wait at least 100ns */
    gpio_set_value(7, 0);
    mdelay(50); /* 50ms until PHY ready */
    /* smc91x interrupt pin */
    gpio_request(8, "SMC91x irq");
    /* 16C554 reset*/
    gpio_request(6, "16C554 reset");
    gpio_direction_output(6, 0);
    /* 16C554 interrupt pins */
    gpio_request(12, "16C554 irq");
    gpio_request(13, "16C554 irq");
    gpio_request(14, "16C554 irq");
    gpio_request(15, "16C554 irq");
    irq_set_irq_type(gpio_to_irq(12), IRQ_TYPE_EDGE_RISING);
    irq_set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
    irq_set_irq_type(gpio_to_irq(14), IRQ_TYPE_EDGE_RISING);
    irq_set_irq_type(gpio_to_irq(15), IRQ_TYPE_EDGE_RISING);

    voiceblue_smc91x_resources[1].start = gpio_to_irq(8);
    voiceblue_smc91x_resources[1].end = gpio_to_irq(8);
    platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
    omap_serial_init();
    omap1_usb_init(&voiceblue_usb_config);
    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 */
}

MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
    /* Maintainer: Ladislav Michl <[email protected]> */
    .atag_offset    = 0x100,
    .map_io     = omap15xx_map_io,
    .init_early     = omap1_init_early,
    .reserve    = omap_reserve,
    .init_irq   = omap1_init_irq,
    .init_machine   = voiceblue_init,
    .init_late  = omap1_init_late,
    .timer      = &omap1_timer,
    .restart    = voiceblue_restart,
MACHINE_END