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