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/module.h>
  14 #include <linux/platform_device.h>
  15
  16 #include <plat/iommu.h>
  17 #include <plat/irqs.h>
  18
  19 struct iommu_device {
  20         resource_size_t base;
  21         int irq;
  22         struct iommu_platform_data pdata;
  23         struct resource res[2];
  24 };
  25 static struct iommu_device *devices;
  26 static int num_iommu_devices;
  27
  28 #ifdef CONFIG_ARCH_OMAP3
  29 static struct iommu_device omap3_devices[] = {
  30         {
  31                 .base = 0x480bd400,
  32                 .irq = 24,
  33                 .pdata = {
  34                         .name = "isp",
  35                         .nr_tlb_entries = 8,
  36                         .clk_name = "cam_ick",
  37                         .da_start = 0x0,
  38                         .da_end = 0xFFFFF000,
  39                 },
  40         },
  41 #if defined(CONFIG_OMAP_IOMMU_IVA2)
  42         {
  43                 .base = 0x5d000000,
  44                 .irq = 28,
  45                 .pdata = {
  46                         .name = "iva2",
  47                         .nr_tlb_entries = 32,
  48                         .clk_name = "iva2_ck",
  49                         .da_start = 0x11000000,
  50                         .da_end = 0xFFFFF000,
  51                 },
  52         },
  53 #endif
  54 };
  55 #define NR_OMAP3_IOMMU_DEVICES ARRAY_SIZE(omap3_devices)
  56 static struct platform_device *omap3_iommu_pdev[NR_OMAP3_IOMMU_DEVICES];
  57 #else
  58 #define omap3_devices           NULL
  59 #define NR_OMAP3_IOMMU_DEVICES  0
  60 #define omap3_iommu_pdev        NULL
  61 #endif
  62
  63 #ifdef CONFIG_ARCH_OMAP4
  64 static struct iommu_device omap4_devices[] = {
  65         {
  66                 .base = OMAP4_MMU1_BASE,
  67                 .irq = OMAP44XX_IRQ_DUCATI_MMU,
  68                 .pdata = {
  69                         .name = "ducati",
  70                         .nr_tlb_entries = 32,
  71                         .clk_name = "ipu_fck",
  72                         .da_start = 0x0,
  73                         .da_end = 0xFFFFF000,
  74                 },
  75         },
  76 #if defined(CONFIG_MPU_TESLA_IOMMU)
  77         {
  78                 .base = OMAP4_MMU2_BASE,
  79                 .irq = INT_44XX_DSP_MMU,
  80                 .pdata = {
  81                         .name = "tesla",
  82                         .nr_tlb_entries = 32,
  83                         .clk_name = "tesla_ick",
  84                         .da_start = 0x0,
  85                         .da_end = 0xFFFFF000,
  86                 },
  87         },
  88 #endif
  89 };
  90 #define NR_OMAP4_IOMMU_DEVICES ARRAY_SIZE(omap4_devices)
  91 static struct platform_device *omap4_iommu_pdev[NR_OMAP4_IOMMU_DEVICES];
  92 #else
  93 #define omap4_devices           NULL
  94 #define NR_OMAP4_IOMMU_DEVICES  0
  95 #define omap4_iommu_pdev        NULL
  96 #endif
  97
  98 static struct platform_device **omap_iommu_pdev;
  99
 100 static int __init omap_iommu_init(void)
 101 {
 102         int i, err;
 103         struct resource res[] = {
 104                 { .flags = IORESOURCE_MEM },
 105                 { .flags = IORESOURCE_IRQ },
 106         };
 107
 108         if (cpu_is_omap34xx()) {
 109                 devices = omap3_devices;
 110                 omap_iommu_pdev = omap3_iommu_pdev;
 111                 num_iommu_devices = NR_OMAP3_IOMMU_DEVICES;
 112         } else if (cpu_is_omap44xx()) {
 113                 devices = omap4_devices;
 114                 omap_iommu_pdev = omap4_iommu_pdev;
 115                 num_iommu_devices = NR_OMAP4_IOMMU_DEVICES;
 116         } else
 117                 return -ENODEV;
 118
 119         for (i = 0; i < num_iommu_devices; i++) {
 120                 struct platform_device *pdev;
 121                 const struct iommu_device *d = &devices[i];
 122
 123                 pdev = platform_device_alloc("omap-iommu", i);
 124                 if (!pdev) {
 125                         err = -ENOMEM;
 126                         goto err_out;
 127                 }
 128
 129                 res[0].start = d->base;
 130                 res[0].end = d->base + MMU_REG_SIZE - 1;
 131                 res[1].start = res[1].end = d->irq;
 132
 133                 err = platform_device_add_resources(pdev, res,
 134                                                     ARRAY_SIZE(res));
 135                 if (err)
 136                         goto err_out;
 137                 err = platform_device_add_data(pdev, &d->pdata,
 138                                                sizeof(d->pdata));
 139                 if (err)
 140                         goto err_out;
 141                 err = platform_device_add(pdev);
 142                 if (err)
 143                         goto err_out;
 144                 omap_iommu_pdev[i] = pdev;
 145         }
 146         return 0;
 147
 148 err_out:
 149         while (i--)
 150                 platform_device_put(omap_iommu_pdev[i]);
 151         return err;
 152 }
 153 /* must be ready before omap3isp is probed */
 154 subsys_initcall(omap_iommu_init);
 155
 156 static void __exit omap_iommu_exit(void)
 157 {
 158         int i;
 159
 160         for (i = 0; i < num_iommu_devices; i++)
 161                 platform_device_unregister(omap_iommu_pdev[i]);
 162 }
 163 module_exit(omap_iommu_exit);
 164
 165 MODULE_AUTHOR("Hiroshi DOYU");
 166 MODULE_DESCRIPTION("omap iommu: omap device registration");
 167 MODULE_LICENSE("GPL v2");