arch/arm/plat-omap/devices.c

   1 /*
   2  * linux/arch/arm/plat-omap/devices.c
   3  *
   4  * Common platform device setup/initialization for OMAP1 and OMAP2
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11 #include <linux/gpio.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/io.h>
  17 #include <linux/slab.h>
  18 #include <linux/memblock.h>
  19
  20 #include <mach/hardware.h>
  21 #include <asm/mach-types.h>
  22 #include <asm/mach/map.h>
  23 #include <asm/memblock.h>
  24
  25 #include <plat/tc.h>
  26 #include <plat/board.h>
  27 #include <plat/mmc.h>
  28 #include <plat/menelaus.h>
  29 #include <plat/omap44xx.h>
  30
  31 #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
  32         defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
  33
  34 #define OMAP_MMC_NR_RES         2
  35
  36 /*
  37  * Register MMC devices. Called from mach-omap1 and mach-omap2 device init.
  38  */
  39 int __init omap_mmc_add(const char *name, int id, unsigned long base,
  40                                 unsigned long size, unsigned int irq,
  41                                 struct omap_mmc_platform_data *data)
  42 {
  43         struct platform_device *pdev;
  44         struct resource res[OMAP_MMC_NR_RES];
  45         int ret;
  46
  47         pdev = platform_device_alloc(name, id);
  48         if (!pdev)
  49                 return -ENOMEM;
  50
  51         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
  52         res[0].start = base;
  53         res[0].end = base + size - 1;
  54         res[0].flags = IORESOURCE_MEM;
  55         res[1].start = res[1].end = irq;
  56         res[1].flags = IORESOURCE_IRQ;
  57
  58         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
  59         if (ret == 0)
  60                 ret = platform_device_add_data(pdev, data, sizeof(*data));
  61         if (ret)
  62                 goto fail;
  63
  64         ret = platform_device_add(pdev);
  65         if (ret)
  66                 goto fail;
  67
  68         /* return device handle to board setup code */
  69         data->dev = &pdev->dev;
  70         return 0;
  71
  72 fail:
  73         platform_device_put(pdev);
  74         return ret;
  75 }
  76
  77 #endif
  78
  79 /*-------------------------------------------------------------------------*/
  80
  81 #if defined(CONFIG_HW_RANDOM_OMAP) || defined(CONFIG_HW_RANDOM_OMAP_MODULE)
  82
  83 #ifdef CONFIG_ARCH_OMAP2
  84 #define OMAP_RNG_BASE           0x480A0000
  85 #else
  86 #define OMAP_RNG_BASE           0xfffe5000
  87 #endif
  88
  89 static struct resource rng_resources[] = {
  90         {
  91                 .start          = OMAP_RNG_BASE,
  92                 .end            = OMAP_RNG_BASE + 0x4f,
  93                 .flags          = IORESOURCE_MEM,
  94         },
  95 };
  96
  97 static struct platform_device omap_rng_device = {
  98         .name           = "omap_rng",
  99         .id             = -1,
 100         .num_resources  = ARRAY_SIZE(rng_resources),
 101         .resource       = rng_resources,
 102 };
 103
 104 static void omap_init_rng(void)
 105 {
 106         (void) platform_device_register(&omap_rng_device);
 107 }
 108 #else
 109 static inline void omap_init_rng(void) {}
 110 #endif
 111
 112 #if defined(CONFIG_TIDSPBRIDGE) || defined(CONFIG_TIDSPBRIDGE_MODULE)
 113
 114 static phys_addr_t omap_dsp_phys_mempool_base;
 115
 116 void __init omap_dsp_reserve_sdram_memblock(void)
 117 {
 118         phys_addr_t size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
 119         phys_addr_t paddr;
 120
 121         if (!size)
 122                 return;
 123
 124         paddr = arm_memblock_steal(size, SZ_1M);
 125         if (!paddr) {
 126                 pr_err("%s: failed to reserve %llx bytes\n",
 127                                 __func__, (unsigned long long)size);
 128                 return;
 129         }
 130
 131         omap_dsp_phys_mempool_base = paddr;
 132 }
 133
 134 phys_addr_t omap_dsp_get_mempool_base(void)
 135 {
 136         return omap_dsp_phys_mempool_base;
 137 }
 138 EXPORT_SYMBOL(omap_dsp_get_mempool_base);
 139 #endif
 140
 141 /*
 142  * This gets called after board-specific INIT_MACHINE, and initializes most
 143  * on-chip peripherals accessible on this board (except for few like USB):
 144  *
 145  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 146  *      code will have muxed GPIO pins and done "nonstandard" setup;
 147  *      that code could live in the boot loader.
 148  *  (b) Populating board-specific platform_data with the data drivers
 149  *      rely on to handle wiring variations.
 150  *  (c) Creating platform devices as meaningful on this board and
 151  *      with this kernel configuration.
 152  *
 153  * Claiming GPIOs, and setting their direction and initial values, is the
 154  * responsibility of the device drivers.  So is responding to probe().
 155  *
 156  * Board-specific knowledge like creating devices or pin setup is to be
 157  * kept out of drivers as much as possible.  In particular, pin setup
 158  * may be handled by the boot loader, and drivers should expect it will
 159  * normally have been done by the time they're probed.
 160  */
 161 static int __init omap_init_devices(void)
 162 {
 163         /* please keep these calls, and their implementations above,
 164          * in alphabetical order so they're easier to sort through.
 165          */
 166         omap_init_rng();
 167         return 0;
 168 }
 169 arch_initcall(omap_init_devices);