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                         .da_start = 0x0,
  37                         .da_end = 0xFFFFF000,
  38                 },
  39         },
  40 #if defined(CONFIG_OMAP_IOMMU_IVA2)
  41         {
  42                 .base = 0x5d000000,
  43                 .irq = 28,
  44                 .pdata = {
  45                         .name = "iva2",
  46                         .nr_tlb_entries = 32,
  47                         .clk_name = "iva2_ck",
  48                         .da_start = 0x11000000,
  49                         .da_end = 0xFFFFF000,
  50                 },
  51         },
  52 #endif
  53 };
  54 #define NR_OMAP3_IOMMU_DEVICES ARRAY_SIZE(omap3_devices)
  55 static struct platform_device *omap3_iommu_pdev[NR_OMAP3_IOMMU_DEVICES];
  56 #else
  57 #define omap3_devices           NULL
  58 #define NR_OMAP3_IOMMU_DEVICES  0
  59 #define omap3_iommu_pdev        NULL
  60 #endif
  61
  62 #ifdef CONFIG_ARCH_OMAP4
  63 static struct iommu_device omap4_devices[] = {
  64         {
  65                 .base = OMAP4_MMU1_BASE,
  66                 .irq = OMAP44XX_IRQ_DUCATI_MMU,
  67                 .pdata = {
  68                         .name = "ducati",
  69                         .nr_tlb_entries = 32,
  70                         .clk_name = "ipu_fck",
  71                         .da_start = 0x0,
  72                         .da_end = 0xFFFFF000,
  73                 },
  74         },
  75 #if defined(CONFIG_MPU_TESLA_IOMMU)
  76         {
  77                 .base = OMAP4_MMU2_BASE,
  78                 .irq = INT_44XX_DSP_MMU,
  79                 .pdata = {
  80                         .name = "tesla",
  81                         .nr_tlb_entries = 32,
  82                         .clk_name = "tesla_ick",
  83                         .da_start = 0x0,
  84                         .da_end = 0xFFFFF000,
  85                 },
  86         },
  87 #endif
  88 };
  89 #define NR_OMAP4_IOMMU_DEVICES ARRAY_SIZE(omap4_devices)
  90 static struct platform_device *omap4_iommu_pdev[NR_OMAP4_IOMMU_DEVICES];
  91 #else
  92 #define omap4_devices           NULL
  93 #define NR_OMAP4_IOMMU_DEVICES  0
  94 #define omap4_iommu_pdev        NULL
  95 #endif
  96
  97 static struct platform_device **omap_iommu_pdev;
  98
  99 static int __init omap_iommu_init(void)
 100 {
 101         int i, err;
 102         struct resource res[] = {
 103                 { .flags = IORESOURCE_MEM },
 104                 { .flags = IORESOURCE_IRQ },
 105         };
 106
 107         if (cpu_is_omap34xx()) {
 108                 devices = omap3_devices;
 109                 omap_iommu_pdev = omap3_iommu_pdev;
 110                 num_iommu_devices = NR_OMAP3_IOMMU_DEVICES;
 111         } else if (cpu_is_omap44xx()) {
 112                 devices = omap4_devices;
 113                 omap_iommu_pdev = omap4_iommu_pdev;
 114                 num_iommu_devices = NR_OMAP4_IOMMU_DEVICES;
 115         } else
 116                 return -ENODEV;
 117
 118         for (i = 0; i < num_iommu_devices; i++) {
 119                 struct platform_device *pdev;
 120                 const struct iommu_device *d = &devices[i];
 121
 122                 pdev = platform_device_alloc("omap-iommu", i);
 123                 if (!pdev) {
 124                         err = -ENOMEM;
 125                         goto err_out;
 126                 }
 127
 128                 res[0].start = d->base;
 129                 res[0].end = d->base + MMU_REG_SIZE - 1;
 130                 res[1].start = res[1].end = d->irq;
 131
 132                 err = platform_device_add_resources(pdev, res,
 133                                                     ARRAY_SIZE(res));
 134                 if (err)
 135                         goto err_out;
 136                 err = platform_device_add_data(pdev, &d->pdata,
 137                                                sizeof(d->pdata));
 138                 if (err)
 139                         goto err_out;
 140                 err = platform_device_add(pdev);
 141                 if (err)
 142                         goto err_out;
 143                 omap_iommu_pdev[i] = pdev;
 144         }
 145         return 0;
 146
 147 err_out:
 148         while (i--)
 149                 platform_device_put(omap_iommu_pdev[i]);
 150         return err;
 151 }
 152 module_init(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");