omap-iommu.c

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/*
 * omap iommu: omap device registration
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Written by Hiroshi DOYU <[email protected]>
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/platform_device.h>

#include <plat/iommu.h>

#include "soc.h"
#include "common.h"

struct iommu_device {
    resource_size_t base;
    int irq;
    struct iommu_platform_data pdata;
    struct resource res[2];
};
static struct iommu_device *devices;
static int num_iommu_devices;

#ifdef CONFIG_ARCH_OMAP3
static struct iommu_device omap3_devices[] = {
    {
        .base = 0x480bd400,
        .irq = 24 + OMAP_INTC_START,
        .pdata = {
            .name = "isp",
            .nr_tlb_entries = 8,
            .clk_name = "cam_ick",
            .da_start = 0x0,
            .da_end = 0xFFFFF000,
        },
    },
#if defined(CONFIG_OMAP_IOMMU_IVA2)
    {
        .base = 0x5d000000,
        .irq = 28 + OMAP_INTC_START,
        .pdata = {
            .name = "iva2",
            .nr_tlb_entries = 32,
            .clk_name = "iva2_ck",
            .da_start = 0x11000000,
            .da_end = 0xFFFFF000,
        },
    },
#endif
};
#define NR_OMAP3_IOMMU_DEVICES ARRAY_SIZE(omap3_devices)
static struct platform_device *omap3_iommu_pdev[NR_OMAP3_IOMMU_DEVICES];
#else
#define omap3_devices       NULL
#define NR_OMAP3_IOMMU_DEVICES  0
#define omap3_iommu_pdev    NULL
#endif

#ifdef CONFIG_ARCH_OMAP4
static struct iommu_device omap4_devices[] = {
    {
        .base = OMAP4_MMU1_BASE,
        .irq = 100 + OMAP44XX_IRQ_GIC_START,
        .pdata = {
            .name = "ducati",
            .nr_tlb_entries = 32,
            .clk_name = "ipu_fck",
            .da_start = 0x0,
            .da_end = 0xFFFFF000,
        },
    },
    {
        .base = OMAP4_MMU2_BASE,
        .irq = 28 + OMAP44XX_IRQ_GIC_START,
        .pdata = {
            .name = "tesla",
            .nr_tlb_entries = 32,
            .clk_name = "dsp_fck",
            .da_start = 0x0,
            .da_end = 0xFFFFF000,
        },
    },
};
#define NR_OMAP4_IOMMU_DEVICES ARRAY_SIZE(omap4_devices)
static struct platform_device *omap4_iommu_pdev[NR_OMAP4_IOMMU_DEVICES];
#else
#define omap4_devices       NULL
#define NR_OMAP4_IOMMU_DEVICES  0
#define omap4_iommu_pdev    NULL
#endif

static struct platform_device **omap_iommu_pdev;

static int __init omap_iommu_init(void)
{
    int i, err;
    struct resource res[] = {
        { .flags = IORESOURCE_MEM },
        { .flags = IORESOURCE_IRQ },
    };

    if (cpu_is_omap34xx()) {
        devices = omap3_devices;
        omap_iommu_pdev = omap3_iommu_pdev;
        num_iommu_devices = NR_OMAP3_IOMMU_DEVICES;
    } else if (cpu_is_omap44xx()) {
        devices = omap4_devices;
        omap_iommu_pdev = omap4_iommu_pdev;
        num_iommu_devices = NR_OMAP4_IOMMU_DEVICES;
    } else
        return -ENODEV;

    for (i = 0; i < num_iommu_devices; i++) {
        struct platform_device *pdev;
        const struct iommu_device *d = &devices[i];

        pdev = platform_device_alloc("omap-iommu", i);
        if (!pdev) {
            err = -ENOMEM;
            goto err_out;
        }

        res[0].start = d->base;
        res[0].end = d->base + MMU_REG_SIZE - 1;
        res[1].start = res[1].end = d->irq;

        err = platform_device_add_resources(pdev, res,
                            ARRAY_SIZE(res));
        if (err)
            goto err_out;
        err = platform_device_add_data(pdev, &d->pdata,
                           sizeof(d->pdata));
        if (err)
            goto err_out;
        err = platform_device_add(pdev);
        if (err)
            goto err_out;
        omap_iommu_pdev[i] = pdev;
    }
    return 0;

err_out:
    while (i--)
        platform_device_put(omap_iommu_pdev[i]);
    return err;
}
/* must be ready before omap3isp is probed */
subsys_initcall(omap_iommu_init);

static void __exit omap_iommu_exit(void)
{
    int i;

    for (i = 0; i < num_iommu_devices; i++)
        platform_device_unregister(omap_iommu_pdev[i]);
}
module_exit(omap_iommu_exit);

MODULE_AUTHOR("Hiroshi DOYU");
MODULE_DESCRIPTION("omap iommu: omap device registration");
MODULE_LICENSE("GPL v2");