arch/arm/mach-omap2/omap-iommu.c

   1 /*
   2  * omap iommu: omap device registration
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/platform_device.h>
  14
  15 #include <plat/iommu.h>
  16 #include <plat/irqs.h>
  17
  18 struct iommu_device {
  19         resource_size_t base;
  20         int irq;
  21         struct iommu_platform_data pdata;
  22         struct resource res[2];
  23 };
  24 static struct iommu_device *devices;
  25 static int num_iommu_devices;
  26
  27 #ifdef CONFIG_ARCH_OMAP3
  28 static struct iommu_device omap3_devices[] = {
  29         {
  30                 .base = 0x480bd400,
  31                 .irq = 24,
  32                 .pdata = {
  33                         .name = "isp",
  34                         .nr_tlb_entries = 8,
  35                         .clk_name = "cam_ick",
  36                 },
  37         },
  38 #if defined(CONFIG_MPU_BRIDGE_IOMMU)
  39         {
  40                 .base = 0x5d000000,
  41                 .irq = 28,
  42                 .pdata = {
  43                         .name = "iva2",
  44                         .nr_tlb_entries = 32,
  45                         .clk_name = "iva2_ck",
  46                 },
  47         },
  48 #endif
  49 };
  50 #define NR_OMAP3_IOMMU_DEVICES ARRAY_SIZE(omap3_devices)
  51 static struct platform_device *omap3_iommu_pdev[NR_OMAP3_IOMMU_DEVICES];
  52 #else
  53 #define omap3_devices           NULL
  54 #define NR_OMAP3_IOMMU_DEVICES  0
  55 #define omap3_iommu_pdev        NULL
  56 #endif
  57
  58 #ifdef CONFIG_ARCH_OMAP4
  59 static struct iommu_device omap4_devices[] = {
  60         {
  61                 .base = OMAP4_MMU1_BASE,
  62                 .irq = INT_44XX_DUCATI_MMU_IRQ,
  63                 .pdata = {
  64                         .name = "ducati",
  65                         .nr_tlb_entries = 32,
  66                         .clk_name = "ducati_ick",
  67                 },
  68         },
  69 #if defined(CONFIG_MPU_TESLA_IOMMU)
  70         {
  71                 .base = OMAP4_MMU2_BASE,
  72                 .irq = INT_44XX_DSP_MMU,
  73                 .pdata = {
  74                         .name = "tesla",
  75                         .nr_tlb_entries = 32,
  76                         .clk_name = "tesla_ick",
  77                 },
  78         },
  79 #endif
  80 };
  81 #define NR_OMAP4_IOMMU_DEVICES ARRAY_SIZE(omap4_devices)
  82 static struct platform_device *omap4_iommu_pdev[NR_OMAP4_IOMMU_DEVICES];
  83 #else
  84 #define omap4_devices           NULL
  85 #define NR_OMAP4_IOMMU_DEVICES  0
  86 #define omap4_iommu_pdev        NULL
  87 #endif
  88
  89 static struct platform_device **omap_iommu_pdev;
  90
  91 static int __init omap_iommu_init(void)
  92 {
  93         int i, err;
  94         struct resource res[] = {
  95                 { .flags = IORESOURCE_MEM },
  96                 { .flags = IORESOURCE_IRQ },
  97         };
  98
  99         if (cpu_is_omap34xx()) {
 100                 devices = omap3_devices;
 101                 omap_iommu_pdev = omap3_iommu_pdev;
 102                 num_iommu_devices = NR_OMAP3_IOMMU_DEVICES;
 103         } else if (cpu_is_omap44xx()) {
 104                 devices = omap4_devices;
 105                 omap_iommu_pdev = omap4_iommu_pdev;
 106                 num_iommu_devices = NR_OMAP4_IOMMU_DEVICES;
 107         } else
 108                 return -ENODEV;
 109
 110         for (i = 0; i < num_iommu_devices; i++) {
 111                 struct platform_device *pdev;
 112                 const struct iommu_device *d = &devices[i];
 113
 114                 pdev = platform_device_alloc("omap-iommu", i);
 115                 if (!pdev) {
 116                         err = -ENOMEM;
 117                         goto err_out;
 118                 }
 119
 120                 res[0].start = d->base;
 121                 res[0].end = d->base + MMU_REG_SIZE - 1;
 122                 res[1].start = res[1].end = d->irq;
 123
 124                 err = platform_device_add_resources(pdev, res,
 125                                                     ARRAY_SIZE(res));
 126                 if (err)
 127                         goto err_out;
 128                 err = platform_device_add_data(pdev, &d->pdata,
 129                                                sizeof(d->pdata));
 130                 if (err)
 131                         goto err_out;
 132                 err = platform_device_add(pdev);
 133                 if (err)
 134                         goto err_out;
 135                 omap_iommu_pdev[i] = pdev;
 136         }
 137         return 0;
 138
 139 err_out:
 140         while (i--)
 141                 platform_device_put(omap_iommu_pdev[i]);
 142         return err;
 143 }
 144 module_init(omap_iommu_init);
 145
 146 static void __exit omap_iommu_exit(void)
 147 {
 148         int i;
 149
 150         for (i = 0; i < num_iommu_devices; i++)
 151                 platform_device_unregister(omap_iommu_pdev[i]);
 152 }
 153 module_exit(omap_iommu_exit);
 154
 155 MODULE_AUTHOR("Hiroshi DOYU");
 156 MODULE_DESCRIPTION("omap iommu: omap device registration");
 157 MODULE_LICENSE("GPL v2");