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
  24 #include <plat/tc.h>
  25 #include <plat/board.h>
  26 #include <plat/mmc.h>
  27 #include <plat/menelaus.h>
  28 #include <plat/mcbsp.h>
  29 #include <plat/omap44xx.h>
  30
  31 /*-------------------------------------------------------------------------*/
  32
  33 #if defined(CONFIG_OMAP_MCBSP) || defined(CONFIG_OMAP_MCBSP_MODULE)
  34
  35 static struct platform_device **omap_mcbsp_devices;
  36
  37 void omap_mcbsp_register_board_cfg(struct resource *res, int res_count,
  38                         struct omap_mcbsp_platform_data *config, int size)
  39 {
  40         int i;
  41
  42         omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *),
  43                                      GFP_KERNEL);
  44         if (!omap_mcbsp_devices) {
  45                 printk(KERN_ERR "Could not register McBSP devices\n");
  46                 return;
  47         }
  48
  49         for (i = 0; i < size; i++) {
  50                 struct platform_device *new_mcbsp;
  51                 int ret;
  52
  53                 new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1);
  54                 if (!new_mcbsp)
  55                         continue;
  56                 platform_device_add_resources(new_mcbsp, &res[i * res_count],
  57                                         res_count);
  58                 new_mcbsp->dev.platform_data = &config[i];
  59                 ret = platform_device_add(new_mcbsp);
  60                 if (ret) {
  61                         platform_device_put(new_mcbsp);
  62                         continue;
  63                 }
  64                 omap_mcbsp_devices[i] = new_mcbsp;
  65         }
  66 }
  67
  68 #else
  69 void omap_mcbsp_register_board_cfg(struct resource *res, int res_count,
  70                         struct omap_mcbsp_platform_data *config, int size)
  71 {  }
  72 #endif
  73
  74 /*-------------------------------------------------------------------------*/
  75
  76 #if defined(CONFIG_SND_OMAP_SOC_MCPDM) || \
  77                 defined(CONFIG_SND_OMAP_SOC_MCPDM_MODULE)
  78
  79 static struct resource mcpdm_resources[] = {
  80         {
  81                 .name           = "mcpdm_mem",
  82                 .start          = OMAP44XX_MCPDM_BASE,
  83                 .end            = OMAP44XX_MCPDM_BASE + SZ_4K,
  84                 .flags          = IORESOURCE_MEM,
  85         },
  86         {
  87                 .name           = "mcpdm_irq",
  88                 .start          = OMAP44XX_IRQ_MCPDM,
  89                 .end            = OMAP44XX_IRQ_MCPDM,
  90                 .flags          = IORESOURCE_IRQ,
  91         },
  92 };
  93
  94 static struct platform_device omap_mcpdm_device = {
  95         .name           = "omap-mcpdm",
  96         .id             = -1,
  97         .num_resources  = ARRAY_SIZE(mcpdm_resources),
  98         .resource       = mcpdm_resources,
  99 };
 100
 101 static void omap_init_mcpdm(void)
 102 {
 103         (void) platform_device_register(&omap_mcpdm_device);
 104 }
 105 #else
 106 static inline void omap_init_mcpdm(void) {}
 107 #endif
 108
 109 /*-------------------------------------------------------------------------*/
 110
 111 #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
 112         defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
 113
 114 #define OMAP_MMC_NR_RES         2
 115
 116 /*
 117  * Register MMC devices. Called from mach-omap1 and mach-omap2 device init.
 118  */
 119 int __init omap_mmc_add(const char *name, int id, unsigned long base,
 120                                 unsigned long size, unsigned int irq,
 121                                 struct omap_mmc_platform_data *data)
 122 {
 123         struct platform_device *pdev;
 124         struct resource res[OMAP_MMC_NR_RES];
 125         int ret;
 126
 127         pdev = platform_device_alloc(name, id);
 128         if (!pdev)
 129                 return -ENOMEM;
 130
 131         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
 132         res[0].start = base;
 133         res[0].end = base + size - 1;
 134         res[0].flags = IORESOURCE_MEM;
 135         res[1].start = res[1].end = irq;
 136         res[1].flags = IORESOURCE_IRQ;
 137
 138         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
 139         if (ret == 0)
 140                 ret = platform_device_add_data(pdev, data, sizeof(*data));
 141         if (ret)
 142                 goto fail;
 143
 144         ret = platform_device_add(pdev);
 145         if (ret)
 146                 goto fail;
 147
 148         /* return device handle to board setup code */
 149         data->dev = &pdev->dev;
 150         return 0;
 151
 152 fail:
 153         platform_device_put(pdev);
 154         return ret;
 155 }
 156
 157 #endif
 158
 159 /*-------------------------------------------------------------------------*/
 160
 161 #if defined(CONFIG_HW_RANDOM_OMAP) || defined(CONFIG_HW_RANDOM_OMAP_MODULE)
 162
 163 #ifdef CONFIG_ARCH_OMAP2
 164 #define OMAP_RNG_BASE           0x480A0000
 165 #else
 166 #define OMAP_RNG_BASE           0xfffe5000
 167 #endif
 168
 169 static struct resource rng_resources[] = {
 170         {
 171                 .start          = OMAP_RNG_BASE,
 172                 .end            = OMAP_RNG_BASE + 0x4f,
 173                 .flags          = IORESOURCE_MEM,
 174         },
 175 };
 176
 177 static struct platform_device omap_rng_device = {
 178         .name           = "omap_rng",
 179         .id             = -1,
 180         .num_resources  = ARRAY_SIZE(rng_resources),
 181         .resource       = rng_resources,
 182 };
 183
 184 static void omap_init_rng(void)
 185 {
 186         (void) platform_device_register(&omap_rng_device);
 187 }
 188 #else
 189 static inline void omap_init_rng(void) {}
 190 #endif
 191
 192 /*-------------------------------------------------------------------------*/
 193
 194 /* Numbering for the SPI-capable controllers when used for SPI:
 195  * spi          = 1
 196  * uwire        = 2
 197  * mmc1..2      = 3..4
 198  * mcbsp1..3    = 5..7
 199  */
 200
 201 #if defined(CONFIG_SPI_OMAP_UWIRE) || defined(CONFIG_SPI_OMAP_UWIRE_MODULE)
 202
 203 #define OMAP_UWIRE_BASE         0xfffb3000
 204
 205 static struct resource uwire_resources[] = {
 206         {
 207                 .start          = OMAP_UWIRE_BASE,
 208                 .end            = OMAP_UWIRE_BASE + 0x20,
 209                 .flags          = IORESOURCE_MEM,
 210         },
 211 };
 212
 213 static struct platform_device omap_uwire_device = {
 214         .name      = "omap_uwire",
 215         .id          = -1,
 216         .num_resources  = ARRAY_SIZE(uwire_resources),
 217         .resource       = uwire_resources,
 218 };
 219
 220 static void omap_init_uwire(void)
 221 {
 222         /* FIXME define and use a boot tag; not all boards will be hooking
 223          * up devices to the microwire controller, and multi-board configs
 224          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 225          */
 226
 227         /* board-specific code must configure chipselects (only a few
 228          * are normally used) and SCLK/SDI/SDO (each has two choices).
 229          */
 230         (void) platform_device_register(&omap_uwire_device);
 231 }
 232 #else
 233 static inline void omap_init_uwire(void) {}
 234 #endif
 235
 236 #if defined(CONFIG_TIDSPBRIDGE) || defined(CONFIG_TIDSPBRIDGE_MODULE)
 237
 238 static phys_addr_t omap_dsp_phys_mempool_base;
 239
 240 void __init omap_dsp_reserve_sdram_memblock(void)
 241 {
 242         phys_addr_t size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
 243         phys_addr_t paddr;
 244
 245         if (!size)
 246                 return;
 247
 248         paddr = memblock_alloc(size, SZ_1M);
 249         if (!paddr) {
 250                 pr_err("%s: failed to reserve %x bytes\n",
 251                                 __func__, size);
 252                 return;
 253         }
 254         memblock_free(paddr, size);
 255         memblock_remove(paddr, size);
 256
 257         omap_dsp_phys_mempool_base = paddr;
 258 }
 259
 260 phys_addr_t omap_dsp_get_mempool_base(void)
 261 {
 262         return omap_dsp_phys_mempool_base;
 263 }
 264 EXPORT_SYMBOL(omap_dsp_get_mempool_base);
 265 #endif
 266
 267 /*
 268  * This gets called after board-specific INIT_MACHINE, and initializes most
 269  * on-chip peripherals accessible on this board (except for few like USB):
 270  *
 271  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 272  *      code will have muxed GPIO pins and done "nonstandard" setup;
 273  *      that code could live in the boot loader.
 274  *  (b) Populating board-specific platform_data with the data drivers
 275  *      rely on to handle wiring variations.
 276  *  (c) Creating platform devices as meaningful on this board and
 277  *      with this kernel configuration.
 278  *
 279  * Claiming GPIOs, and setting their direction and initial values, is the
 280  * responsibility of the device drivers.  So is responding to probe().
 281  *
 282  * Board-specific knowledge like creating devices or pin setup is to be
 283  * kept out of drivers as much as possible.  In particular, pin setup
 284  * may be handled by the boot loader, and drivers should expect it will
 285  * normally have been done by the time they're probed.
 286  */
 287 static int __init omap_init_devices(void)
 288 {
 289         /* please keep these calls, and their implementations above,
 290          * in alphabetical order so they're easier to sort through.
 291          */
 292         omap_init_rng();
 293         omap_init_mcpdm();
 294         omap_init_uwire();
 295         return 0;
 296 }
 297 arch_initcall(omap_init_devices);