board-gpr.c

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/*
 * GPR board platform device registration (Au1550)
 *
 * Copyright (C) 2010 Wolfgang Grandegger <[email protected]>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/mach-au1x00/au1000.h>
#include <prom.h>

const char *get_system_type(void)
{
    return "GPR";
}

void __init prom_init(void)
{
    unsigned char *memsize_str;
    unsigned long memsize;

    prom_argc = fw_arg0;
    prom_argv = (char **)fw_arg1;
    prom_envp = (char **)fw_arg2;

    prom_init_cmdline();

    memsize_str = prom_getenv("memsize");
    if (!memsize_str)
        memsize = 0x04000000;
    else
        strict_strtoul(memsize_str, 0, &memsize);
    add_memory_region(0, memsize, BOOT_MEM_RAM);
}

void prom_putchar(unsigned char c)
{
    alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
}

static void gpr_reset(char *c)
{
    /* switch System-LED to orange (red# and green# on) */
    alchemy_gpio_direction_output(4, 0);
    alchemy_gpio_direction_output(5, 0);

    /* trigger watchdog to reset board in 200ms */
    printk(KERN_EMERG "Triggering watchdog soft reset...\n");
    raw_local_irq_disable();
    alchemy_gpio_direction_output(1, 0);
    udelay(1);
    alchemy_gpio_set_value(1, 1);
    while (1)
        cpu_wait();
}

static void gpr_power_off(void)
{
    while (1)
        cpu_wait();
}

void __init board_setup(void)
{
    printk(KERN_INFO "Trapeze ITS GPR board\n");

    pm_power_off = gpr_power_off;
    _machine_halt = gpr_power_off;
    _machine_restart = gpr_reset;

    /* Enable UART1/3 */
    alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
    alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);

    /* Take away Reset of UMTS-card */
    alchemy_gpio_direction_output(215, 1);
}

/*
 * Watchdog
 */
static struct resource gpr_wdt_resource[] = {
    [0] = {
        .start  = 1,
        .end    = 1,
        .name   = "gpr-adm6320-wdt",
        .flags  = IORESOURCE_IRQ,
    }
};

static struct platform_device gpr_wdt_device = {
    .name = "adm6320-wdt",
    .id = 0,
    .num_resources = ARRAY_SIZE(gpr_wdt_resource),
    .resource = gpr_wdt_resource,
};

/*
 * FLASH
 *
 * 0x00000000-0x00200000 : "kernel"
 * 0x00200000-0x00a00000 : "rootfs"
 * 0x01d00000-0x01f00000 : "config"
 * 0x01c00000-0x01d00000 : "yamon"
 * 0x01d00000-0x01d40000 : "yamon env vars"
 * 0x00000000-0x00a00000 : "kernel+rootfs"
 */
static struct mtd_partition gpr_mtd_partitions[] = {
    {
        .name   = "kernel",
        .size   = 0x00200000,
        .offset = 0,
    },
    {
        .name   = "rootfs",
        .size   = 0x00800000,
        .offset = MTDPART_OFS_APPEND,
        .mask_flags = MTD_WRITEABLE,
    },
    {
        .name   = "config",
        .size   = 0x00200000,
        .offset = 0x01d00000,
    },
    {
        .name   = "yamon",
        .size   = 0x00100000,
        .offset = 0x01c00000,
    },
    {
        .name   = "yamon env vars",
        .size   = 0x00040000,
        .offset = MTDPART_OFS_APPEND,
    },
    {
        .name   = "kernel+rootfs",
        .size   = 0x00a00000,
        .offset = 0,
    },
};

static struct physmap_flash_data gpr_flash_data = {
    .width      = 4,
    .nr_parts   = ARRAY_SIZE(gpr_mtd_partitions),
    .parts      = gpr_mtd_partitions,
};

static struct resource gpr_mtd_resource = {
    .start  = 0x1e000000,
    .end    = 0x1fffffff,
    .flags  = IORESOURCE_MEM,
};

static struct platform_device gpr_mtd_device = {
    .name       = "physmap-flash",
    .dev        = {
        .platform_data  = &gpr_flash_data,
    },
    .num_resources  = 1,
    .resource   = &gpr_mtd_resource,
};

/*
 * LEDs
 */
static struct gpio_led gpr_gpio_leds[] = {
    {   /* green */
        .name           = "gpr:green",
        .gpio           = 4,
        .active_low     = 1,
    },
    {   /* red */
        .name           = "gpr:red",
        .gpio           = 5,
        .active_low     = 1,
    }
};

static struct gpio_led_platform_data gpr_led_data = {
    .num_leds = ARRAY_SIZE(gpr_gpio_leds),
    .leds = gpr_gpio_leds,
};

static struct platform_device gpr_led_devices = {
    .name = "leds-gpio",
    .id = -1,
    .dev = {
        .platform_data = &gpr_led_data,
    }
};

/*
 * I2C
 */
static struct i2c_gpio_platform_data gpr_i2c_data = {
    .sda_pin        = 209,
    .sda_is_open_drain  = 1,
    .scl_pin        = 210,
    .scl_is_open_drain  = 1,
    .udelay         = 2,        /* ~100 kHz */
    .timeout        = HZ,
};

static struct platform_device gpr_i2c_device = {
    .name           = "i2c-gpio",
    .id         = -1,
    .dev.platform_data  = &gpr_i2c_data,
};

static struct i2c_board_info gpr_i2c_info[] __initdata = {
    {
        I2C_BOARD_INFO("lm83", 0x18),
        .type = "lm83"
    }
};



static struct resource alchemy_pci_host_res[] = {
    [0] = {
        .start  = AU1500_PCI_PHYS_ADDR,
        .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
        .flags  = IORESOURCE_MEM,
    },
};

static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
{
    if ((slot == 0) && (pin == 1))
        return AU1550_PCI_INTA;
    else if ((slot == 0) && (pin == 2))
        return AU1550_PCI_INTB;

    return 0xff;
}

static struct alchemy_pci_platdata gpr_pci_pd = {
    .board_map_irq  = gpr_map_pci_irq,
    .pci_cfg_set    = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
              PCI_CONFIG_CH |
#if defined(__MIPSEB__)
              PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
#else
              0,
#endif
};

static struct platform_device gpr_pci_host_dev = {
    .dev.platform_data = &gpr_pci_pd,
    .name       = "alchemy-pci",
    .id     = 0,
    .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
    .resource   = alchemy_pci_host_res,
};

static struct platform_device *gpr_devices[] __initdata = {
    &gpr_wdt_device,
    &gpr_mtd_device,
    &gpr_i2c_device,
    &gpr_led_devices,
};

static int __init gpr_pci_init(void)
{
    return platform_device_register(&gpr_pci_host_dev);
}
/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
arch_initcall(gpr_pci_init);


static int __init gpr_dev_init(void)
{
    i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));

    return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
}
device_initcall(gpr_dev_init);