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         {
  77                 .base = OMAP4_MMU2_BASE,
  78                 .irq = OMAP44XX_IRQ_TESLA_MMU,
  79                 .pdata = {
  80                         .name = "tesla",
  81                         .nr_tlb_entries = 32,
  82                         .clk_name = "dsp_fck",
  83                         .da_start = 0x0,
  84                         .da_end = 0xFFFFF000,
  85                 },
  86         },
  87 };
  88 #define NR_OMAP4_IOMMU_DEVICES ARRAY_SIZE(omap4_devices)
  89 static struct platform_device *omap4_iommu_pdev[NR_OMAP4_IOMMU_DEVICES];
  90 #else
  91 #define omap4_devices           NULL
  92 #define NR_OMAP4_IOMMU_DEVICES  0
  93 #define omap4_iommu_pdev        NULL
  94 #endif
  95
  96 static struct platform_device **omap_iommu_pdev;
  97
  98 static int __init omap_iommu_init(void)
  99 {
 100         int i, err;
 101         struct resource res[] = {
 102                 { .flags = IORESOURCE_MEM },
 103                 { .flags = IORESOURCE_IRQ },
 104         };
 105
 106         if (cpu_is_omap34xx()) {
 107                 devices = omap3_devices;
 108                 omap_iommu_pdev = omap3_iommu_pdev;
 109                 num_iommu_devices = NR_OMAP3_IOMMU_DEVICES;
 110         } else if (cpu_is_omap44xx()) {
 111                 devices = omap4_devices;
 112                 omap_iommu_pdev = omap4_iommu_pdev;
 113                 num_iommu_devices = NR_OMAP4_IOMMU_DEVICES;
 114         } else
 115                 return -ENODEV;
 116
 117         for (i = 0; i < num_iommu_devices; i++) {
 118                 struct platform_device *pdev;
 119                 const struct iommu_device *d = &devices[i];
 120
 121                 pdev = platform_device_alloc("omap-iommu", i);
 122                 if (!pdev) {
 123                         err = -ENOMEM;
 124                         goto err_out;
 125                 }
 126
 127                 res[0].start = d->base;
 128                 res[0].end = d->base + MMU_REG_SIZE - 1;
 129                 res[1].start = res[1].end = d->irq;
 130
 131                 err = platform_device_add_resources(pdev, res,
 132                                                     ARRAY_SIZE(res));
 133                 if (err)
 134                         goto err_out;
 135                 err = platform_device_add_data(pdev, &d->pdata,
 136                                                sizeof(d->pdata));
 137                 if (err)
 138                         goto err_out;
 139                 err = platform_device_add(pdev);
 140                 if (err)
 141                         goto err_out;
 142                 omap_iommu_pdev[i] = pdev;
 143         }
 144         return 0;
 145
 146 err_out:
 147         while (i--)
 148                 platform_device_put(omap_iommu_pdev[i]);
 149         return err;
 150 }
 151 /* must be ready before omap3isp is probed */
 152 subsys_initcall(omap_iommu_init);
 153
 154 static void __exit omap_iommu_exit(void)
 155 {
 156         int i;
 157
 158         for (i = 0; i < num_iommu_devices; i++)
 159                 platform_device_unregister(omap_iommu_pdev[i]);
 160 }
 161 module_exit(omap_iommu_exit);
 162
 163 MODULE_AUTHOR("Hiroshi DOYU");
 164 MODULE_DESCRIPTION("omap iommu: omap device registration");
 165 MODULE_LICENSE("GPL v2");