Linux 2.6.20.9

[linux/fpc-iii.git] / arch / arm / mach-pxa / generic.c

/*
 *  linux/arch/arm/mach-pxa/generic.c
 *
 *  Author:     Nicolas Pitre
 *  Created:    Jun 15, 2001
 *  Copyright:  MontaVista Software Inc.
 *
 * Code common to all PXA machines.
 *
 * 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.
 *
 * Since this file should be linked before any other machine specific file,
 * the __initcall() here will be executed first.  This serves as default
 * initialization stuff for PXA machines which can be overridden later if
 * need be.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <linux/string.h>

#include <linux/sched.h>
#include <asm/cnt32_to_63.h>
#include <asm/div64.h>

#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>

#include <asm/arch/pxa-regs.h>
#include <asm/arch/udc.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/mmc.h>
#include <asm/arch/irda.h>
#include <asm/arch/i2c.h>

#include "generic.h"

/*
 * This is the PXA2xx sched_clock implementation. This has a resolution
 * of at least 308ns and a maximum value that depends on the value of
 * CLOCK_TICK_RATE.
 *
 * The return value is guaranteed to be monotonic in that range as
 * long as there is always less than 582 seconds between successive
 * calls to this function.
 */
unsigned long long sched_clock(void)
{
        unsigned long long v = cnt32_to_63(OSCR);
        /* Note: top bit ov v needs cleared unless multiplier is even. */

#if     CLOCK_TICK_RATE == 3686400
        /* 1E9 / 3686400 => 78125 / 288, max value = 32025597s (370 days). */
        /* The <<1 is used to get rid of tick.hi top bit */
        v *= 78125<<1;
        do_div(v, 288<<1);
#elif   CLOCK_TICK_RATE == 3250000
        /* 1E9 / 3250000 => 4000 / 13, max value = 709490156s (8211 days) */
        v *= 4000;
        do_div(v, 13);
#elif   CLOCK_TICK_RATE == 3249600
        /* 1E9 / 3249600 => 625000 / 2031, max value = 4541295s (52 days) */
        v *= 625000;
        do_div(v, 2031);
#else
#warning "consider fixing sched_clock for your value of CLOCK_TICK_RATE"
        /*
         * 96-bit math to perform tick * NSEC_PER_SEC / CLOCK_TICK_RATE for
         * any value of CLOCK_TICK_RATE. Max value is in the 80 thousand
         * years range and truncation to unsigned long long limits it to
         * sched_clock's max range of ~584 years.  This is nice but with
         * higher computation cost.
         */
        {
                union {
                        unsigned long long val;
                        struct { unsigned long lo, hi; };
                } x;
                unsigned long long y;

                x.val = v;
                x.hi &= 0x7fffffff;
                y = (unsigned long long)x.lo * NSEC_PER_SEC;
                x.lo = y;
                y = (y >> 32) + (unsigned long long)x.hi * NSEC_PER_SEC;
                x.hi = do_div(y, CLOCK_TICK_RATE);
                do_div(x.val, CLOCK_TICK_RATE);
                x.hi += y;
                v = x.val;
        }
#endif

        return v;
}

/*
 * Handy function to set GPIO alternate functions
 */

void pxa_gpio_mode(int gpio_mode)
{
        unsigned long flags;
        int gpio = gpio_mode & GPIO_MD_MASK_NR;
        int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
        int gafr;

        local_irq_save(flags);
        if (gpio_mode & GPIO_DFLT_LOW)
                GPCR(gpio) = GPIO_bit(gpio);
        else if (gpio_mode & GPIO_DFLT_HIGH)
                GPSR(gpio) = GPIO_bit(gpio);
        if (gpio_mode & GPIO_MD_MASK_DIR)
                GPDR(gpio) |= GPIO_bit(gpio);
        else
                GPDR(gpio) &= ~GPIO_bit(gpio);
        gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
        GAFR(gpio) = gafr |  (fn  << (((gpio) & 0xf)*2));
        local_irq_restore(flags);
}

EXPORT_SYMBOL(pxa_gpio_mode);

/*
 * Routine to safely enable or disable a clock in the CKEN
 */
void pxa_set_cken(int clock, int enable)
{
        unsigned long flags;
        local_irq_save(flags);

        if (enable)
                CKEN |= clock;
        else
                CKEN &= ~clock;

        local_irq_restore(flags);
}

EXPORT_SYMBOL(pxa_set_cken);

/*
 * Intel PXA2xx internal register mapping.
 *
 * Note 1: not all PXA2xx variants implement all those addresses.
 *
 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
 *         and cache flush area.
 */
static struct map_desc standard_io_desc[] __initdata = {
        {       /* Devs */
                .virtual        =  0xf2000000,
                .pfn            = __phys_to_pfn(0x40000000),
                .length         = 0x02000000,
                .type           = MT_DEVICE
        }, {    /* LCD */
                .virtual        =  0xf4000000,
                .pfn            = __phys_to_pfn(0x44000000),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        }, {    /* Mem Ctl */
                .virtual        =  0xf6000000,
                .pfn            = __phys_to_pfn(0x48000000),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        }, {    /* USB host */
                .virtual        =  0xf8000000,
                .pfn            = __phys_to_pfn(0x4c000000),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        }, {    /* Camera */
                .virtual        =  0xfa000000,
                .pfn            = __phys_to_pfn(0x50000000),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        }, {    /* IMem ctl */
                .virtual        =  0xfe000000,
                .pfn            = __phys_to_pfn(0x58000000),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        }, {    /* UNCACHED_PHYS_0 */
                .virtual        = 0xff000000,
                .pfn            = __phys_to_pfn(0x00000000),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        }
};

void __init pxa_map_io(void)
{
        iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
        get_clk_frequency_khz(1);
}


static struct resource pxamci_resources[] = {
        [0] = {
                .start  = 0x41100000,
                .end    = 0x41100fff,
                .flags  = IORESOURCE_MEM,
        },
        [1] = {
                .start  = IRQ_MMC,
                .end    = IRQ_MMC,
                .flags  = IORESOURCE_IRQ,
        },
};

static u64 pxamci_dmamask = 0xffffffffUL;

static struct platform_device pxamci_device = {
        .name           = "pxa2xx-mci",
        .id             = -1,
        .dev            = {
                .dma_mask = &pxamci_dmamask,
                .coherent_dma_mask = 0xffffffff,
        },
        .num_resources  = ARRAY_SIZE(pxamci_resources),
        .resource       = pxamci_resources,
};

void __init pxa_set_mci_info(struct pxamci_platform_data *info)
{
        pxamci_device.dev.platform_data = info;
}


static struct pxa2xx_udc_mach_info pxa_udc_info;

void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
{
        memcpy(&pxa_udc_info, info, sizeof *info);
}

static struct resource pxa2xx_udc_resources[] = {
        [0] = {
                .start  = 0x40600000,
                .end    = 0x4060ffff,
                .flags  = IORESOURCE_MEM,
        },
        [1] = {
                .start  = IRQ_USB,
                .end    = IRQ_USB,
                .flags  = IORESOURCE_IRQ,
        },
};

static u64 udc_dma_mask = ~(u32)0;

static struct platform_device udc_device = {
        .name           = "pxa2xx-udc",
        .id             = -1,
        .resource       = pxa2xx_udc_resources,
        .num_resources  = ARRAY_SIZE(pxa2xx_udc_resources),
        .dev            =  {
                .platform_data  = &pxa_udc_info,
                .dma_mask       = &udc_dma_mask,
        }
};

static struct resource pxafb_resources[] = {
        [0] = {
                .start  = 0x44000000,
                .end    = 0x4400ffff,
                .flags  = IORESOURCE_MEM,
        },
        [1] = {
                .start  = IRQ_LCD,
                .end    = IRQ_LCD,
                .flags  = IORESOURCE_IRQ,
        },
};

static u64 fb_dma_mask = ~(u64)0;

static struct platform_device pxafb_device = {
        .name           = "pxa2xx-fb",
        .id             = -1,
        .dev            = {
                .dma_mask       = &fb_dma_mask,
                .coherent_dma_mask = 0xffffffff,
        },
        .num_resources  = ARRAY_SIZE(pxafb_resources),
        .resource       = pxafb_resources,
};

void __init set_pxa_fb_info(struct pxafb_mach_info *info)
{
        pxafb_device.dev.platform_data = info;
}

void __init set_pxa_fb_parent(struct device *parent_dev)
{
        pxafb_device.dev.parent = parent_dev;
}

static struct platform_device ffuart_device = {
        .name           = "pxa2xx-uart",
        .id             = 0,
};
static struct platform_device btuart_device = {
        .name           = "pxa2xx-uart",
        .id             = 1,
};
static struct platform_device stuart_device = {
        .name           = "pxa2xx-uart",
        .id             = 2,
};
static struct platform_device hwuart_device = {
        .name           = "pxa2xx-uart",
        .id             = 3,
};

static struct resource i2c_resources[] = {
        {
                .start  = 0x40301680,
                .end    = 0x403016a3,
                .flags  = IORESOURCE_MEM,
        }, {
                .start  = IRQ_I2C,
                .end    = IRQ_I2C,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct platform_device i2c_device = {
        .name           = "pxa2xx-i2c",
        .id             = 0,
        .resource       = i2c_resources,
        .num_resources  = ARRAY_SIZE(i2c_resources),
};

void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
{
        i2c_device.dev.platform_data = info;
}

static struct resource i2s_resources[] = {
        {
                .start  = 0x40400000,
                .end    = 0x40400083,
                .flags  = IORESOURCE_MEM,
        }, {
                .start  = IRQ_I2S,
                .end    = IRQ_I2S,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct platform_device i2s_device = {
        .name           = "pxa2xx-i2s",
        .id             = -1,
        .resource       = i2s_resources,
        .num_resources  = ARRAY_SIZE(i2s_resources),
};

static u64 pxaficp_dmamask = ~(u32)0;

static struct platform_device pxaficp_device = {
        .name           = "pxa2xx-ir",
        .id             = -1,
        .dev            = {
                .dma_mask = &pxaficp_dmamask,
                .coherent_dma_mask = 0xffffffff,
        },
};

void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
{
        pxaficp_device.dev.platform_data = info;
}

static struct platform_device pxartc_device = {
        .name           = "sa1100-rtc",
        .id             = -1,
};

static struct platform_device *devices[] __initdata = {
        &pxamci_device,
        &udc_device,
        &pxafb_device,
        &ffuart_device,
        &btuart_device,
        &stuart_device,
        &pxaficp_device,
        &i2c_device,
        &i2s_device,
        &pxartc_device,
};

static int __init pxa_init(void)
{
        int cpuid, ret;

        ret = platform_add_devices(devices, ARRAY_SIZE(devices));
        if (ret)
                return ret;

        /* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */
        cpuid = read_cpuid(CPUID_ID);
        if (((cpuid >> 4) & 0xfff) == 0x2d0 ||
            ((cpuid >> 4) & 0xfff) == 0x290)
                ret = platform_device_register(&hwuart_device);

        return ret;
}

subsys_initcall(pxa_init);