board-mtx1.c

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/*
 * MTX-1 platform devices registration (Au1500)
 *
 * Copyright (C) 2007-2009, Florian Fainelli <[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/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <mtd/mtd-abi.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/au1xxx_eth.h>
#include <prom.h>

const char *get_system_type(void)
{
    return "MTX-1";
}

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 mtx1_reset(char *c)
{
    /* Jump to the reset vector */
    __asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
}

static void mtx1_power_off(void)
{
    while (1)
        asm volatile (
        "   .set    mips32                  \n"
        "   wait                        \n"
        "   .set    mips0                   \n");
}

void __init board_setup(void)
{
#if IS_ENABLED(CONFIG_USB_OHCI_HCD)
    /* Enable USB power switch */
    alchemy_gpio_direction_output(204, 0);
#endif /* IS_ENABLED(CONFIG_USB_OHCI_HCD) */

    /* Initialize sys_pinfunc */
    au_writel(SYS_PF_NI2, SYS_PINFUNC);

    /* Initialize GPIO */
    au_writel(~0, KSEG1ADDR(AU1000_SYS_PHYS_ADDR) + SYS_TRIOUTCLR);
    alchemy_gpio_direction_output(0, 0);    /* Disable M66EN (PCI 66MHz) */
    alchemy_gpio_direction_output(3, 1);    /* Disable PCI CLKRUN# */
    alchemy_gpio_direction_output(1, 1);    /* Enable EXT_IO3 */
    alchemy_gpio_direction_output(5, 0);    /* Disable eth PHY TX_ER */

    /* Enable LED and set it to green */
    alchemy_gpio_direction_output(211, 1);  /* green on */
    alchemy_gpio_direction_output(212, 0);  /* red off */

    pm_power_off = mtx1_power_off;
    _machine_halt = mtx1_power_off;
    _machine_restart = mtx1_reset;

    printk(KERN_INFO "4G Systems MTX-1 Board\n");
}

/******************************************************************************/

static struct gpio_keys_button mtx1_gpio_button[] = {
    {
        .gpio = 207,
        .code = BTN_0,
        .desc = "System button",
    }
};

static struct gpio_keys_platform_data mtx1_buttons_data = {
    .buttons = mtx1_gpio_button,
    .nbuttons = ARRAY_SIZE(mtx1_gpio_button),
};

static struct platform_device mtx1_button = {
    .name = "gpio-keys",
    .id = -1,
    .dev = {
        .platform_data = &mtx1_buttons_data,
    }
};

static struct resource mtx1_wdt_res[] = {
    [0] = {
        .start  = 215,
        .end    = 215,
        .name   = "mtx1-wdt-gpio",
        .flags  = IORESOURCE_IRQ,
    }
};

static struct platform_device mtx1_wdt = {
    .name = "mtx1-wdt",
    .id = 0,
    .num_resources = ARRAY_SIZE(mtx1_wdt_res),
    .resource = mtx1_wdt_res,
};

static struct gpio_led default_leds[] = {
    {
        .name   = "mtx1:green",
        .gpio = 211,
    }, {
        .name = "mtx1:red",
        .gpio = 212,
    },
};

static struct gpio_led_platform_data mtx1_led_data = {
    .num_leds = ARRAY_SIZE(default_leds),
    .leds = default_leds,
};

static struct platform_device mtx1_gpio_leds = {
    .name = "leds-gpio",
    .id = -1,
    .dev = {
        .platform_data = &mtx1_led_data,
    }
};

static struct mtd_partition mtx1_mtd_partitions[] = {
    {
        .name   = "filesystem",
        .size   = 0x01C00000,
        .offset = 0,
    },
    {
        .name   = "yamon",
        .size   = 0x00100000,
        .offset = MTDPART_OFS_APPEND,
        .mask_flags = MTD_WRITEABLE,
    },
    {
        .name   = "kernel",
        .size   = 0x002c0000,
        .offset = MTDPART_OFS_APPEND,
    },
    {
        .name   = "yamon env",
        .size   = 0x00040000,
        .offset = MTDPART_OFS_APPEND,
    },
};

static struct physmap_flash_data mtx1_flash_data = {
    .width      = 4,
    .nr_parts   = 4,
    .parts      = mtx1_mtd_partitions,
};

static struct resource mtx1_mtd_resource = {
    .start  = 0x1e000000,
    .end    = 0x1fffffff,
    .flags  = IORESOURCE_MEM,
};

static struct platform_device mtx1_mtd = {
    .name       = "physmap-flash",
    .dev        = {
        .platform_data  = &mtx1_flash_data,
    },
    .num_resources  = 1,
    .resource   = &mtx1_mtd_resource,
};

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

static int mtx1_pci_idsel(unsigned int devsel, int assert)
{
    /* This function is only necessary to support a proprietary Cardbus
     * adapter on the mtx-1 "singleboard" variant. It triggers a custom
     * logic chip connected to EXT_IO3 (GPIO1) to suppress IDSEL signals.
     */
    udelay(1);

    if (assert && devsel != 0)
        /* Suppress signal to Cardbus */
        alchemy_gpio_set_value(1, 0);   /* set EXT_IO3 OFF */
    else
        alchemy_gpio_set_value(1, 1);   /* set EXT_IO3 ON */

    udelay(1);
    return 1;
}

static const char mtx1_irqtab[][5] = {
    [0] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 00 - AdapterA-Slot0 (top) */
    [1] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 01 - AdapterA-Slot1 (bottom) */
    [2] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 02 - AdapterB-Slot0 (top) */
    [3] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 03 - AdapterB-Slot1 (bottom) */
    [4] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTB, 0xff, 0xff }, /* IDSEL 04 - AdapterC-Slot0 (top) */
    [5] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 05 - AdapterC-Slot1 (bottom) */
    [6] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 06 - AdapterD-Slot0 (top) */
    [7] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 07 - AdapterD-Slot1 (bottom) */
};

static int mtx1_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
{
    return mtx1_irqtab[slot][pin];
}

static struct alchemy_pci_platdata mtx1_pci_pd = {
    .board_map_irq   = mtx1_map_pci_irq,
    .board_pci_idsel = mtx1_pci_idsel,
    .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 mtx1_pci_host = {
    .dev.platform_data = &mtx1_pci_pd,
    .name       = "alchemy-pci",
    .id     = 0,
    .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
    .resource   = alchemy_pci_host_res,
};

static struct __initdata platform_device * mtx1_devs[] = {
    &mtx1_pci_host,
    &mtx1_gpio_leds,
    &mtx1_wdt,
    &mtx1_button,
    &mtx1_mtd,
};

static struct au1000_eth_platform_data mtx1_au1000_eth0_pdata = {
    .phy_search_highest_addr    = 1,
    .phy1_search_mac0       = 1,
};

static int __init mtx1_register_devices(void)
{
    int rc;

    irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
    irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);

    au1xxx_override_eth_cfg(0, &mtx1_au1000_eth0_pdata);

    rc = gpio_request(mtx1_gpio_button[0].gpio,
                    mtx1_gpio_button[0].desc);
    if (rc < 0) {
        printk(KERN_INFO "mtx1: failed to request %d\n",
                    mtx1_gpio_button[0].gpio);
        goto out;
    }
    gpio_direction_input(mtx1_gpio_button[0].gpio);
out:
    return platform_add_devices(mtx1_devs, ARRAY_SIZE(mtx1_devs));
}
arch_initcall(mtx1_register_devices);