platform.c

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/*
 * Copyright (C) 2006,2007 Felix Fietkau <[email protected]>
 * Copyright (C) 2006,2007 Eugene Konev <[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/types.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/vlynq.h>
#include <linux/leds.h>
#include <linux/string.h>
#include <linux/etherdevice.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/gpio.h>
#include <linux/clk.h>

#include <asm/addrspace.h>
#include <asm/mach-ar7/ar7.h>
#include <asm/mach-ar7/gpio.h>
#include <asm/mach-ar7/prom.h>

/*****************************************************************************
 * VLYNQ Bus
 ****************************************************************************/
struct plat_vlynq_data {
    struct plat_vlynq_ops ops;
    int gpio_bit;
    int reset_bit;
};

static int vlynq_on(struct vlynq_device *dev)
{
    int ret;
    struct plat_vlynq_data *pdata = dev->dev.platform_data;

    ret = gpio_request(pdata->gpio_bit, "vlynq");
    if (ret)
        goto out;

    ar7_device_reset(pdata->reset_bit);

    ret = ar7_gpio_disable(pdata->gpio_bit);
    if (ret)
        goto out_enabled;

    ret = ar7_gpio_enable(pdata->gpio_bit);
    if (ret)
        goto out_enabled;

    ret = gpio_direction_output(pdata->gpio_bit, 0);
    if (ret)
        goto out_gpio_enabled;

    msleep(50);

    gpio_set_value(pdata->gpio_bit, 1);

    msleep(50);

    return 0;

out_gpio_enabled:
    ar7_gpio_disable(pdata->gpio_bit);
out_enabled:
    ar7_device_disable(pdata->reset_bit);
    gpio_free(pdata->gpio_bit);
out:
    return ret;
}

static void vlynq_off(struct vlynq_device *dev)
{
    struct plat_vlynq_data *pdata = dev->dev.platform_data;

    ar7_gpio_disable(pdata->gpio_bit);
    gpio_free(pdata->gpio_bit);
    ar7_device_disable(pdata->reset_bit);
}

static struct resource vlynq_low_res[] = {
    {
        .name   = "regs",
        .flags  = IORESOURCE_MEM,
        .start  = AR7_REGS_VLYNQ0,
        .end    = AR7_REGS_VLYNQ0 + 0xff,
    },
    {
        .name   = "irq",
        .flags  = IORESOURCE_IRQ,
        .start  = 29,
        .end    = 29,
    },
    {
        .name   = "mem",
        .flags  = IORESOURCE_MEM,
        .start  = 0x04000000,
        .end    = 0x04ffffff,
    },
    {
        .name   = "devirq",
        .flags  = IORESOURCE_IRQ,
        .start  = 80,
        .end    = 111,
    },
};

static struct resource vlynq_high_res[] = {
    {
        .name   = "regs",
        .flags  = IORESOURCE_MEM,
        .start  = AR7_REGS_VLYNQ1,
        .end    = AR7_REGS_VLYNQ1 + 0xff,
    },
    {
        .name   = "irq",
        .flags  = IORESOURCE_IRQ,
        .start  = 33,
        .end    = 33,
    },
    {
        .name   = "mem",
        .flags  = IORESOURCE_MEM,
        .start  = 0x0c000000,
        .end    = 0x0cffffff,
    },
    {
        .name   = "devirq",
        .flags  = IORESOURCE_IRQ,
        .start  = 112,
        .end    = 143,
    },
};

static struct plat_vlynq_data vlynq_low_data = {
    .ops = {
        .on = vlynq_on,
        .off    = vlynq_off,
    },
    .reset_bit  = 20,
    .gpio_bit   = 18,
};

static struct plat_vlynq_data vlynq_high_data = {
    .ops = {
        .on = vlynq_on,
        .off    = vlynq_off,
    },
    .reset_bit  = 16,
    .gpio_bit   = 19,
};

static struct platform_device vlynq_low = {
    .id     = 0,
    .name       = "vlynq",
    .dev = {
        .platform_data  = &vlynq_low_data,
    },
    .resource   = vlynq_low_res,
    .num_resources  = ARRAY_SIZE(vlynq_low_res),
};

static struct platform_device vlynq_high = {
    .id     = 1,
    .name       = "vlynq",
    .dev = {
        .platform_data  = &vlynq_high_data,
    },
    .resource   = vlynq_high_res,
    .num_resources  = ARRAY_SIZE(vlynq_high_res),
};

/*****************************************************************************
 * Flash
 ****************************************************************************/
static struct resource physmap_flash_resource = {
    .name   = "mem",
    .flags  = IORESOURCE_MEM,
    .start  = 0x10000000,
    .end    = 0x107fffff,
};

static struct physmap_flash_data physmap_flash_data = {
    .width  = 2,
};

static struct platform_device physmap_flash = {
    .name       = "physmap-flash",
    .dev = {
        .platform_data  = &physmap_flash_data,
    },
    .resource   = &physmap_flash_resource,
    .num_resources  = 1,
};

/*****************************************************************************
 * Ethernet
 ****************************************************************************/
static struct resource cpmac_low_res[] = {
    {
        .name   = "regs",
        .flags  = IORESOURCE_MEM,
        .start  = AR7_REGS_MAC0,
        .end    = AR7_REGS_MAC0 + 0x7ff,
    },
    {
        .name   = "irq",
        .flags  = IORESOURCE_IRQ,
        .start  = 27,
        .end    = 27,
    },
};

static struct resource cpmac_high_res[] = {
    {
        .name   = "regs",
        .flags  = IORESOURCE_MEM,
        .start  = AR7_REGS_MAC1,
        .end    = AR7_REGS_MAC1 + 0x7ff,
    },
    {
        .name   = "irq",
        .flags  = IORESOURCE_IRQ,
        .start  = 41,
        .end    = 41,
    },
};

static struct fixed_phy_status fixed_phy_status __initdata = {
    .link       = 1,
    .speed      = 100,
    .duplex     = 1,
};

static struct plat_cpmac_data cpmac_low_data = {
    .reset_bit  = 17,
    .power_bit  = 20,
    .phy_mask   = 0x80000000,
};

static struct plat_cpmac_data cpmac_high_data = {
    .reset_bit  = 21,
    .power_bit  = 22,
    .phy_mask   = 0x7fffffff,
};

static u64 cpmac_dma_mask = DMA_BIT_MASK(32);

static struct platform_device cpmac_low = {
    .id     = 0,
    .name       = "cpmac",
    .dev = {
        .dma_mask       = &cpmac_dma_mask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
        .platform_data      = &cpmac_low_data,
    },
    .resource   = cpmac_low_res,
    .num_resources  = ARRAY_SIZE(cpmac_low_res),
};

static struct platform_device cpmac_high = {
    .id     = 1,
    .name       = "cpmac",
    .dev = {
        .dma_mask       = &cpmac_dma_mask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
        .platform_data      = &cpmac_high_data,
    },
    .resource   = cpmac_high_res,
    .num_resources  = ARRAY_SIZE(cpmac_high_res),
};

static void __init cpmac_get_mac(int instance, unsigned char *dev_addr)
{
    char name[5], *mac;

    sprintf(name, "mac%c", 'a' + instance);
    mac = prom_getenv(name);
    if (!mac && instance) {
        sprintf(name, "mac%c", 'a');
        mac = prom_getenv(name);
    }

    if (mac) {
        if (sscanf(mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
                    &dev_addr[0], &dev_addr[1],
                    &dev_addr[2], &dev_addr[3],
                    &dev_addr[4], &dev_addr[5]) != 6) {
            pr_warning("cannot parse mac address, "
                    "using random address\n");
            eth_random_addr(dev_addr);
        }
    } else
        eth_random_addr(dev_addr);
}

/*****************************************************************************
 * USB
 ****************************************************************************/
static struct resource usb_res[] = {
    {
        .name   = "regs",
        .flags  = IORESOURCE_MEM,
        .start  = AR7_REGS_USB,
        .end    = AR7_REGS_USB + 0xff,
    },
    {
        .name   = "irq",
        .flags  = IORESOURCE_IRQ,
        .start  = 32,
        .end    = 32,
    },
    {
        .name   = "mem",
        .flags  = IORESOURCE_MEM,
        .start  = 0x03400000,
        .end    = 0x03401fff,
    },
};

static struct platform_device ar7_udc = {
    .name       = "ar7_udc",
    .resource   = usb_res,
    .num_resources  = ARRAY_SIZE(usb_res),
};

/*****************************************************************************
 * LEDs
 ****************************************************************************/
static struct gpio_led default_leds[] = {
    {
        .name           = "status",
        .gpio           = 8,
        .active_low     = 1,
    },
};

static struct gpio_led titan_leds[] = {
    { .name = "status", .gpio = 8, .active_low = 1, },
    { .name = "wifi", .gpio = 13, .active_low = 1, },
};

static struct gpio_led dsl502t_leds[] = {
    {
        .name           = "status",
        .gpio           = 9,
        .active_low     = 1,
    },
    {
        .name           = "ethernet",
        .gpio           = 7,
        .active_low     = 1,
    },
    {
        .name           = "usb",
        .gpio           = 12,
        .active_low     = 1,
    },
};

static struct gpio_led dg834g_leds[] = {
    {
        .name           = "ppp",
        .gpio           = 6,
        .active_low     = 1,
    },
    {
        .name           = "status",
        .gpio           = 7,
        .active_low     = 1,
    },
    {
        .name           = "adsl",
        .gpio           = 8,
        .active_low     = 1,
    },
    {
        .name           = "wifi",
        .gpio           = 12,
        .active_low     = 1,
    },
    {
        .name           = "power",
        .gpio           = 14,
        .active_low     = 1,
        .default_trigger    = "default-on",
    },
};

static struct gpio_led fb_sl_leds[] = {
    {
        .name           = "1",
        .gpio           = 7,
    },
    {
        .name           = "2",
        .gpio           = 13,
        .active_low     = 1,
    },
    {
        .name           = "3",
        .gpio           = 10,
        .active_low     = 1,
    },
    {
        .name           = "4",
        .gpio           = 12,
        .active_low     = 1,
    },
    {
        .name           = "5",
        .gpio           = 9,
        .active_low     = 1,
    },
};

static struct gpio_led fb_fon_leds[] = {
    {
        .name           = "1",
        .gpio           = 8,
    },
    {
        .name           = "2",
        .gpio           = 3,
        .active_low     = 1,
    },
    {
        .name           = "3",
        .gpio           = 5,
    },
    {
        .name           = "4",
        .gpio           = 4,
        .active_low     = 1,
    },
    {
        .name           = "5",
        .gpio           = 11,
        .active_low     = 1,
    },
};

static struct gpio_led gt701_leds[] = {
    {
        .name           = "inet:green",
        .gpio           = 13,
        .active_low     = 1,
    },
    {
        .name           = "usb",
        .gpio           = 12,
        .active_low     = 1,
    },
    {
        .name           = "inet:red",
        .gpio           = 9,
        .active_low     = 1,
    },
    {
        .name           = "power:red",
        .gpio           = 7,
        .active_low     = 1,
    },
    {
        .name           = "power:green",
        .gpio           = 8,
        .active_low     = 1,
        .default_trigger    = "default-on",
    },
        {
                .name                   = "ethernet",
                .gpio                   = 10,
                .active_low             = 1,
        },
};

static struct gpio_led_platform_data ar7_led_data;

static struct platform_device ar7_gpio_leds = {
    .name = "leds-gpio",
    .dev = {
        .platform_data = &ar7_led_data,
    }
};

static void __init detect_leds(void)
{
    char *prid, *usb_prod;

    /* Default LEDs */
    ar7_led_data.num_leds = ARRAY_SIZE(default_leds);
    ar7_led_data.leds = default_leds;

    /* FIXME: the whole thing is unreliable */
    prid = prom_getenv("ProductID");
    usb_prod = prom_getenv("usb_prod");

    /* If we can't get the product id from PROM, use the default LEDs */
    if (!prid)
        return;

    if (strstr(prid, "Fritz_Box_FON")) {
        ar7_led_data.num_leds = ARRAY_SIZE(fb_fon_leds);
        ar7_led_data.leds = fb_fon_leds;
    } else if (strstr(prid, "Fritz_Box_")) {
        ar7_led_data.num_leds = ARRAY_SIZE(fb_sl_leds);
        ar7_led_data.leds = fb_sl_leds;
    } else if ((!strcmp(prid, "AR7RD") || !strcmp(prid, "AR7DB"))
        && usb_prod != NULL && strstr(usb_prod, "DSL-502T")) {
        ar7_led_data.num_leds = ARRAY_SIZE(dsl502t_leds);
        ar7_led_data.leds = dsl502t_leds;
    } else if (strstr(prid, "DG834")) {
        ar7_led_data.num_leds = ARRAY_SIZE(dg834g_leds);
        ar7_led_data.leds = dg834g_leds;
    } else if (strstr(prid, "CYWM") || strstr(prid, "CYWL")) {
        ar7_led_data.num_leds = ARRAY_SIZE(titan_leds);
        ar7_led_data.leds = titan_leds;
    } else if (strstr(prid, "GT701")) {
        ar7_led_data.num_leds = ARRAY_SIZE(gt701_leds);
        ar7_led_data.leds = gt701_leds;
    }
}

/*****************************************************************************
 * Watchdog
 ****************************************************************************/
static struct resource ar7_wdt_res = {
    .name       = "regs",
    .flags      = IORESOURCE_MEM,
    .start      = -1,   /* Filled at runtime */
    .end        = -1,   /* Filled at runtime */
};

static struct platform_device ar7_wdt = {
    .name       = "ar7_wdt",
    .resource   = &ar7_wdt_res,
    .num_resources  = 1,
};

/*****************************************************************************
 * Init
 ****************************************************************************/
static int __init ar7_register_uarts(void)
{
#ifdef CONFIG_SERIAL_8250
    static struct uart_port uart_port __initdata;
    struct clk *bus_clk;
    int res;

    memset(&uart_port, 0, sizeof(struct uart_port));

    bus_clk = clk_get(NULL, "bus");
    if (IS_ERR(bus_clk))
        panic("unable to get bus clk");

    uart_port.type      = PORT_AR7;
    uart_port.uartclk   = clk_get_rate(bus_clk) / 2;
    uart_port.iotype    = UPIO_MEM32;
    uart_port.regshift  = 2;

    uart_port.line      = 0;
    uart_port.irq       = AR7_IRQ_UART0;
    uart_port.mapbase   = AR7_REGS_UART0;
    uart_port.membase   = ioremap(uart_port.mapbase, 256);

    res = early_serial_setup(&uart_port);
    if (res)
        return res;

    /* Only TNETD73xx have a second serial port */
    if (ar7_has_second_uart()) {
        uart_port.line      = 1;
        uart_port.irq       = AR7_IRQ_UART1;
        uart_port.mapbase   = UR8_REGS_UART1;
        uart_port.membase   = ioremap(uart_port.mapbase, 256);

        res = early_serial_setup(&uart_port);
        if (res)
            return res;
    }
#endif

    return 0;
}

static void __init titan_fixup_devices(void)
{
    /* Set vlynq0 data */
    vlynq_low_data.reset_bit = 15;
    vlynq_low_data.gpio_bit = 14;

    /* Set vlynq1 data */
    vlynq_high_data.reset_bit = 16;
    vlynq_high_data.gpio_bit = 7;

    /* Set vlynq0 resources */
    vlynq_low_res[0].start = TITAN_REGS_VLYNQ0;
    vlynq_low_res[0].end = TITAN_REGS_VLYNQ0 + 0xff;
    vlynq_low_res[1].start = 33;
    vlynq_low_res[1].end = 33;
    vlynq_low_res[2].start = 0x0c000000;
    vlynq_low_res[2].end = 0x0fffffff;
    vlynq_low_res[3].start = 80;
    vlynq_low_res[3].end = 111;

    /* Set vlynq1 resources */
    vlynq_high_res[0].start = TITAN_REGS_VLYNQ1;
    vlynq_high_res[0].end = TITAN_REGS_VLYNQ1 + 0xff;
    vlynq_high_res[1].start = 34;
    vlynq_high_res[1].end = 34;
    vlynq_high_res[2].start = 0x40000000;
    vlynq_high_res[2].end = 0x43ffffff;
    vlynq_high_res[3].start = 112;
    vlynq_high_res[3].end = 143;

    /* Set cpmac0 data */
    cpmac_low_data.phy_mask = 0x40000000;

    /* Set cpmac1 data */
    cpmac_high_data.phy_mask = 0x80000000;

    /* Set cpmac0 resources */
    cpmac_low_res[0].start = TITAN_REGS_MAC0;
    cpmac_low_res[0].end = TITAN_REGS_MAC0 + 0x7ff;

    /* Set cpmac1 resources */
    cpmac_high_res[0].start = TITAN_REGS_MAC1;
    cpmac_high_res[0].end = TITAN_REGS_MAC1 + 0x7ff;
}

static int __init ar7_register_devices(void)
{
    void __iomem *bootcr;
    u32 val;
    int res;

    res = ar7_register_uarts();
    if (res)
        pr_err("unable to setup uart(s): %d\n", res);

    res = platform_device_register(&physmap_flash);
    if (res)
        pr_warning("unable to register physmap-flash: %d\n", res);

    if (ar7_is_titan())
        titan_fixup_devices();

    ar7_device_disable(vlynq_low_data.reset_bit);
    res = platform_device_register(&vlynq_low);
    if (res)
        pr_warning("unable to register vlynq-low: %d\n", res);

    if (ar7_has_high_vlynq()) {
        ar7_device_disable(vlynq_high_data.reset_bit);
        res = platform_device_register(&vlynq_high);
        if (res)
            pr_warning("unable to register vlynq-high: %d\n", res);
    }

    if (ar7_has_high_cpmac()) {
        res = fixed_phy_add(PHY_POLL, cpmac_high.id, &fixed_phy_status);
        if (!res) {
            cpmac_get_mac(1, cpmac_high_data.dev_addr);

            res = platform_device_register(&cpmac_high);
            if (res)
                pr_warning("unable to register cpmac-high: %d\n", res);
        } else
            pr_warning("unable to add cpmac-high phy: %d\n", res);
    } else
        cpmac_low_data.phy_mask = 0xffffffff;

    res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status);
    if (!res) {
        cpmac_get_mac(0, cpmac_low_data.dev_addr);
        res = platform_device_register(&cpmac_low);
        if (res)
            pr_warning("unable to register cpmac-low: %d\n", res);
    } else
        pr_warning("unable to add cpmac-low phy: %d\n", res);

    detect_leds();
    res = platform_device_register(&ar7_gpio_leds);
    if (res)
        pr_warning("unable to register leds: %d\n", res);

    res = platform_device_register(&ar7_udc);
    if (res)
        pr_warning("unable to register usb slave: %d\n", res);

    /* Register watchdog only if enabled in hardware */
    bootcr = ioremap_nocache(AR7_REGS_DCL, 4);
    val = readl(bootcr);
    iounmap(bootcr);
    if (val & AR7_WDT_HW_ENA) {
        if (ar7_has_high_vlynq())
            ar7_wdt_res.start = UR8_REGS_WDT;
        else
            ar7_wdt_res.start = AR7_REGS_WDT;

        ar7_wdt_res.end = ar7_wdt_res.start + 0x20;
        res = platform_device_register(&ar7_wdt);
        if (res)
            pr_warning("unable to register watchdog: %d\n", res);
    }

    return 0;
}
device_initcall(ar7_register_devices);