core.c

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/*
 *  linux/arch/arm/mach-realview/core.c
 *
 *  Copyright (C) 1999 - 2003 ARM Limited
 *  Copyright (C) 2000 Deep Blue Solutions Ltd
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/io.h>
#include <linux/smsc911x.h>
#include <linux/ata_platform.h>
#include <linux/amba/mmci.h>
#include <linux/gfp.h>
#include <linux/mtd/physmap.h>

#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/icst.h>

#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>

#include <asm/hardware/gic.h>

#include <mach/platform.h>
#include <mach/irqs.h>
#include <asm/hardware/timer-sp.h>

#include <plat/clcd.h>
#include <plat/sched_clock.h>

#include "core.h"

#define REALVIEW_FLASHCTRL    (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET)

static void realview_flash_set_vpp(struct platform_device *pdev, int on)
{
    u32 val;

    val = __raw_readl(REALVIEW_FLASHCTRL);
    if (on)
        val |= REALVIEW_FLASHPROG_FLVPPEN;
    else
        val &= ~REALVIEW_FLASHPROG_FLVPPEN;
    __raw_writel(val, REALVIEW_FLASHCTRL);
}

static struct physmap_flash_data realview_flash_data = {
    .width          = 4,
    .set_vpp        = realview_flash_set_vpp,
};

struct platform_device realview_flash_device = {
    .name           = "physmap-flash",
    .id         = 0,
    .dev            = {
        .platform_data  = &realview_flash_data,
    },
};

int realview_flash_register(struct resource *res, u32 num)
{
    realview_flash_device.resource = res;
    realview_flash_device.num_resources = num;
    return platform_device_register(&realview_flash_device);
}

static struct smsc911x_platform_config smsc911x_config = {
    .flags      = SMSC911X_USE_32BIT,
    .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
    .irq_type   = SMSC911X_IRQ_TYPE_PUSH_PULL,
    .phy_interface  = PHY_INTERFACE_MODE_MII,
};

static struct platform_device realview_eth_device = {
    .name       = "smsc911x",
    .id     = 0,
    .num_resources  = 2,
};

int realview_eth_register(const char *name, struct resource *res)
{
    if (name)
        realview_eth_device.name = name;
    realview_eth_device.resource = res;
    if (strcmp(realview_eth_device.name, "smsc911x") == 0)
        realview_eth_device.dev.platform_data = &smsc911x_config;

    return platform_device_register(&realview_eth_device);
}

struct platform_device realview_usb_device = {
    .name           = "isp1760",
    .num_resources      = 2,
};

int realview_usb_register(struct resource *res)
{
    realview_usb_device.resource = res;
    return platform_device_register(&realview_usb_device);
}

static struct pata_platform_info pata_platform_data = {
    .ioport_shift       = 1,
};

static struct resource pata_resources[] = {
    [0] = {
        .start      = REALVIEW_CF_BASE,
        .end        = REALVIEW_CF_BASE + 0xff,
        .flags      = IORESOURCE_MEM,
    },
    [1] = {
        .start      = REALVIEW_CF_BASE + 0x100,
        .end        = REALVIEW_CF_BASE + SZ_4K - 1,
        .flags      = IORESOURCE_MEM,
    },
};

struct platform_device realview_cf_device = {
    .name           = "pata_platform",
    .id         = -1,
    .num_resources      = ARRAY_SIZE(pata_resources),
    .resource       = pata_resources,
    .dev            = {
        .platform_data  = &pata_platform_data,
    },
};

static struct resource realview_i2c_resource = {
    .start      = REALVIEW_I2C_BASE,
    .end        = REALVIEW_I2C_BASE + SZ_4K - 1,
    .flags      = IORESOURCE_MEM,
};

struct platform_device realview_i2c_device = {
    .name       = "versatile-i2c",
    .id     = 0,
    .num_resources  = 1,
    .resource   = &realview_i2c_resource,
};

static struct i2c_board_info realview_i2c_board_info[] = {
    {
        I2C_BOARD_INFO("ds1338", 0xd0 >> 1),
    },
};

static int __init realview_i2c_init(void)
{
    return i2c_register_board_info(0, realview_i2c_board_info,
                       ARRAY_SIZE(realview_i2c_board_info));
}
arch_initcall(realview_i2c_init);

#define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET)

/*
 * This is only used if GPIOLIB support is disabled
 */
static unsigned int realview_mmc_status(struct device *dev)
{
    struct amba_device *adev = container_of(dev, struct amba_device, dev);
    u32 mask;

    if (machine_is_realview_pb1176()) {
        static bool inserted = false;

        /*
         * The PB1176 does not have the status register,
         * assume it is inserted at startup, then invert
         * for each call so card insertion/removal will
         * be detected anyway. This will not be called if
         * GPIO on PL061 is active, which is the proper
         * way to do this on the PB1176.
         */
        inserted = !inserted;
        return inserted ? 0 : 1;
    }

    if (adev->res.start == REALVIEW_MMCI0_BASE)
        mask = 1;
    else
        mask = 2;

    return readl(REALVIEW_SYSMCI) & mask;
}

struct mmci_platform_data realview_mmc0_plat_data = {
    .ocr_mask   = MMC_VDD_32_33|MMC_VDD_33_34,
    .status     = realview_mmc_status,
    .gpio_wp    = 17,
    .gpio_cd    = 16,
    .cd_invert  = true,
};

struct mmci_platform_data realview_mmc1_plat_data = {
    .ocr_mask   = MMC_VDD_32_33|MMC_VDD_33_34,
    .status     = realview_mmc_status,
    .gpio_wp    = 19,
    .gpio_cd    = 18,
    .cd_invert  = true,
};

void __init realview_init_early(void)
{
    void __iomem *sys = __io_address(REALVIEW_SYS_BASE);

    versatile_sched_clock_init(sys + REALVIEW_SYS_24MHz_OFFSET, 24000000);
}

/*
 * CLCD support.
 */
#define SYS_CLCD_NLCDIOON   (1 << 2)
#define SYS_CLCD_VDDPOSSWITCH   (1 << 3)
#define SYS_CLCD_PWR3V5SWITCH   (1 << 4)
#define SYS_CLCD_ID_MASK    (0x1f << 8)
#define SYS_CLCD_ID_SANYO_3_8   (0x00 << 8)
#define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
#define SYS_CLCD_ID_EPSON_2_2   (0x02 << 8)
#define SYS_CLCD_ID_SANYO_2_5   (0x07 << 8)
#define SYS_CLCD_ID_VGA     (0x1f << 8)

/*
 * Disable all display connectors on the interface module.
 */
static void realview_clcd_disable(struct clcd_fb *fb)
{
    void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
    u32 val;

    val = readl(sys_clcd);
    val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
    writel(val, sys_clcd);
}

/*
 * Enable the relevant connector on the interface module.
 */
static void realview_clcd_enable(struct clcd_fb *fb)
{
    void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
    u32 val;

    /*
     * Enable the PSUs
     */
    val = readl(sys_clcd);
    val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
    writel(val, sys_clcd);
}

/*
 * Detect which LCD panel is connected, and return the appropriate
 * clcd_panel structure.  Note: we do not have any information on
 * the required timings for the 8.4in panel, so we presently assume
 * VGA timings.
 */
static int realview_clcd_setup(struct clcd_fb *fb)
{
    void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET;
    const char *panel_name, *vga_panel_name;
    unsigned long framesize;
    u32 val;

    if (machine_is_realview_eb()) {
        /* VGA, 16bpp */
        framesize = 640 * 480 * 2;
        vga_panel_name = "VGA";
    } else {
        /* XVGA, 16bpp */
        framesize = 1024 * 768 * 2;
        vga_panel_name = "XVGA";
    }

    val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
    if (val == SYS_CLCD_ID_SANYO_3_8)
        panel_name = "Sanyo TM38QV67A02A";
    else if (val == SYS_CLCD_ID_SANYO_2_5)
        panel_name = "Sanyo QVGA Portrait";
    else if (val == SYS_CLCD_ID_EPSON_2_2)
        panel_name = "Epson L2F50113T00";
    else if (val == SYS_CLCD_ID_VGA)
        panel_name = vga_panel_name;
    else {
        pr_err("CLCD: unknown LCD panel ID 0x%08x, using VGA\n", val);
        panel_name = vga_panel_name;
    }

    fb->panel = versatile_clcd_get_panel(panel_name);
    if (!fb->panel)
        return -EINVAL;

    return versatile_clcd_setup_dma(fb, framesize);
}

struct clcd_board clcd_plat_data = {
    .name       = "RealView",
    .caps       = CLCD_CAP_ALL,
    .check      = clcdfb_check,
    .decode     = clcdfb_decode,
    .disable    = realview_clcd_disable,
    .enable     = realview_clcd_enable,
    .setup      = realview_clcd_setup,
    .mmap       = versatile_clcd_mmap_dma,
    .remove     = versatile_clcd_remove_dma,
};

/*
 * Where is the timer (VA)?
 */
void __iomem *timer0_va_base;
void __iomem *timer1_va_base;
void __iomem *timer2_va_base;
void __iomem *timer3_va_base;

/*
 * Set up the clock source and clock events devices
 */
void __init realview_timer_init(unsigned int timer_irq)
{
    u32 val;

    /* 
     * set clock frequency: 
     *  REALVIEW_REFCLK is 32KHz
     *  REALVIEW_TIMCLK is 1MHz
     */
    val = readl(__io_address(REALVIEW_SCTL_BASE));
    writel((REALVIEW_TIMCLK << REALVIEW_TIMER1_EnSel) |
           (REALVIEW_TIMCLK << REALVIEW_TIMER2_EnSel) | 
           (REALVIEW_TIMCLK << REALVIEW_TIMER3_EnSel) |
           (REALVIEW_TIMCLK << REALVIEW_TIMER4_EnSel) | val,
           __io_address(REALVIEW_SCTL_BASE));

    /*
     * Initialise to a known state (all timers off)
     */
    writel(0, timer0_va_base + TIMER_CTRL);
    writel(0, timer1_va_base + TIMER_CTRL);
    writel(0, timer2_va_base + TIMER_CTRL);
    writel(0, timer3_va_base + TIMER_CTRL);

    sp804_clocksource_init(timer3_va_base, "timer3");
    sp804_clockevents_init(timer0_va_base, timer_irq, "timer0");
}

/*
 * Setup the memory banks.
 */
void realview_fixup(struct tag *tags, char **from, struct meminfo *meminfo)
{
    /*
     * Most RealView platforms have 512MB contiguous RAM at 0x70000000.
     * Half of this is mirrored at 0.
     */
#ifdef CONFIG_REALVIEW_HIGH_PHYS_OFFSET
    meminfo->bank[0].start = 0x70000000;
    meminfo->bank[0].size = SZ_512M;
    meminfo->nr_banks = 1;
#else
    meminfo->bank[0].start = 0;
    meminfo->bank[0].size = SZ_256M;
    meminfo->nr_banks = 1;
#endif
}