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omap-iommu.c

/*
 * omap iommu: omap device registration
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
 *
 * 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/platform_device.h>

#include <plat/iommu.h>
#include <plat/irqs.h>

00018 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,
            .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,
            .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 = OMAP44XX_IRQ_DUCATI_MMU,
            .pdata = {
                  .name = "ducati",
                  .nr_tlb_entries = 32,
                  .clk_name = "ducati_ick",
                  .da_start = 0x0,
                  .da_end = 0xFFFFF000,
            },
      },
#if defined(CONFIG_MPU_TESLA_IOMMU)
      {
            .base = OMAP4_MMU2_BASE,
            .irq = INT_44XX_DSP_MMU,
            .pdata = {
                  .name = "tesla",
                  .nr_tlb_entries = 32,
                  .clk_name = "tesla_ick",
                  .da_start = 0x0,
                  .da_end = 0xFFFFF000,
            },
      },
#endif
};
#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;
}
module_init(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");

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