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
  19 #include <mach/hardware.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/mach/map.h>
  22
  23 #include <plat/tc.h>
  24 #include <plat/control.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 omap_mcbsp_platform_data *config,
  39                                         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                 new_mcbsp->dev.platform_data = &config[i];
  58                 ret = platform_device_add(new_mcbsp);
  59                 if (ret) {
  60                         platform_device_put(new_mcbsp);
  61                         continue;
  62                 }
  63                 omap_mcbsp_devices[i] = new_mcbsp;
  64         }
  65 }
  66
  67 #else
  68 void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
  69                                         int size)
  70 {  }
  71 #endif
  72
  73 /*-------------------------------------------------------------------------*/
  74
  75 #if defined(CONFIG_SND_OMAP_SOC_MCPDM) || \
  76                 defined(CONFIG_SND_OMAP_SOC_MCPDM_MODULE)
  77
  78 static struct resource mcpdm_resources[] = {
  79         {
  80                 .name           = "mcpdm_mem",
  81                 .start          = OMAP44XX_MCPDM_BASE,
  82                 .end            = OMAP44XX_MCPDM_BASE + SZ_4K,
  83                 .flags          = IORESOURCE_MEM,
  84         },
  85         {
  86                 .name           = "mcpdm_irq",
  87                 .start          = OMAP44XX_IRQ_MCPDM,
  88                 .end            = OMAP44XX_IRQ_MCPDM,
  89                 .flags          = IORESOURCE_IRQ,
  90         },
  91 };
  92
  93 static struct platform_device omap_mcpdm_device = {
  94         .name           = "omap-mcpdm",
  95         .id             = -1,
  96         .num_resources  = ARRAY_SIZE(mcpdm_resources),
  97         .resource       = mcpdm_resources,
  98 };
  99
 100 static void omap_init_mcpdm(void)
 101 {
 102         (void) platform_device_register(&omap_mcpdm_device);
 103 }
 104 #else
 105 static inline void omap_init_mcpdm(void) {}
 106 #endif
 107
 108 /*-------------------------------------------------------------------------*/
 109
 110 #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE) || \
 111         defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
 112
 113 #define OMAP_MMC_NR_RES         2
 114
 115 /*
 116  * Register MMC devices. Called from mach-omap1 and mach-omap2 device init.
 117  */
 118 int __init omap_mmc_add(const char *name, int id, unsigned long base,
 119                                 unsigned long size, unsigned int irq,
 120                                 struct omap_mmc_platform_data *data)
 121 {
 122         struct platform_device *pdev;
 123         struct resource res[OMAP_MMC_NR_RES];
 124         int ret;
 125
 126         pdev = platform_device_alloc(name, id);
 127         if (!pdev)
 128                 return -ENOMEM;
 129
 130         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
 131         res[0].start = base;
 132         res[0].end = base + size - 1;
 133         res[0].flags = IORESOURCE_MEM;
 134         res[1].start = res[1].end = irq;
 135         res[1].flags = IORESOURCE_IRQ;
 136
 137         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
 138         if (ret == 0)
 139                 ret = platform_device_add_data(pdev, data, sizeof(*data));
 140         if (ret)
 141                 goto fail;
 142
 143         ret = platform_device_add(pdev);
 144         if (ret)
 145                 goto fail;
 146
 147         /* return device handle to board setup code */
 148         data->dev = &pdev->dev;
 149         return 0;
 150
 151 fail:
 152         platform_device_put(pdev);
 153         return ret;
 154 }
 155
 156 #endif
 157
 158 /*-------------------------------------------------------------------------*/
 159
 160 #if defined(CONFIG_HW_RANDOM_OMAP) || defined(CONFIG_HW_RANDOM_OMAP_MODULE)
 161
 162 #ifdef CONFIG_ARCH_OMAP2
 163 #define OMAP_RNG_BASE           0x480A0000
 164 #else
 165 #define OMAP_RNG_BASE           0xfffe5000
 166 #endif
 167
 168 static struct resource rng_resources[] = {
 169         {
 170                 .start          = OMAP_RNG_BASE,
 171                 .end            = OMAP_RNG_BASE + 0x4f,
 172                 .flags          = IORESOURCE_MEM,
 173         },
 174 };
 175
 176 static struct platform_device omap_rng_device = {
 177         .name           = "omap_rng",
 178         .id             = -1,
 179         .num_resources  = ARRAY_SIZE(rng_resources),
 180         .resource       = rng_resources,
 181 };
 182
 183 static void omap_init_rng(void)
 184 {
 185         (void) platform_device_register(&omap_rng_device);
 186 }
 187 #else
 188 static inline void omap_init_rng(void) {}
 189 #endif
 190
 191 /*-------------------------------------------------------------------------*/
 192
 193 /* Numbering for the SPI-capable controllers when used for SPI:
 194  * spi          = 1
 195  * uwire        = 2
 196  * mmc1..2      = 3..4
 197  * mcbsp1..3    = 5..7
 198  */
 199
 200 #if defined(CONFIG_SPI_OMAP_UWIRE) || defined(CONFIG_SPI_OMAP_UWIRE_MODULE)
 201
 202 #define OMAP_UWIRE_BASE         0xfffb3000
 203
 204 static struct resource uwire_resources[] = {
 205         {
 206                 .start          = OMAP_UWIRE_BASE,
 207                 .end            = OMAP_UWIRE_BASE + 0x20,
 208                 .flags          = IORESOURCE_MEM,
 209         },
 210 };
 211
 212 static struct platform_device omap_uwire_device = {
 213         .name      = "omap_uwire",
 214         .id          = -1,
 215         .num_resources  = ARRAY_SIZE(uwire_resources),
 216         .resource       = uwire_resources,
 217 };
 218
 219 static void omap_init_uwire(void)
 220 {
 221         /* FIXME define and use a boot tag; not all boards will be hooking
 222          * up devices to the microwire controller, and multi-board configs
 223          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 224          */
 225
 226         /* board-specific code must configure chipselects (only a few
 227          * are normally used) and SCLK/SDI/SDO (each has two choices).
 228          */
 229         (void) platform_device_register(&omap_uwire_device);
 230 }
 231 #else
 232 static inline void omap_init_uwire(void) {}
 233 #endif
 234
 235 /*-------------------------------------------------------------------------*/
 236
 237 #if     defined(CONFIG_OMAP_WATCHDOG) || defined(CONFIG_OMAP_WATCHDOG_MODULE)
 238
 239 static struct resource wdt_resources[] = {
 240         {
 241                 .flags          = IORESOURCE_MEM,
 242         },
 243 };
 244
 245 static struct platform_device omap_wdt_device = {
 246         .name      = "omap_wdt",
 247         .id          = -1,
 248         .num_resources  = ARRAY_SIZE(wdt_resources),
 249         .resource       = wdt_resources,
 250 };
 251
 252 static void omap_init_wdt(void)
 253 {
 254         if (cpu_is_omap16xx())
 255                 wdt_resources[0].start = 0xfffeb000;
 256         else if (cpu_is_omap2420())
 257                 wdt_resources[0].start = 0x48022000; /* WDT2 */
 258         else if (cpu_is_omap2430())
 259                 wdt_resources[0].start = 0x49016000; /* WDT2 */
 260         else if (cpu_is_omap343x())
 261                 wdt_resources[0].start = 0x48314000; /* WDT2 */
 262         else if (cpu_is_omap44xx())
 263                 wdt_resources[0].start = 0x4a314000;
 264         else
 265                 return;
 266
 267         wdt_resources[0].end = wdt_resources[0].start + 0x4f;
 268
 269         (void) platform_device_register(&omap_wdt_device);
 270 }
 271 #else
 272 static inline void omap_init_wdt(void) {}
 273 #endif
 274
 275 /*
 276  * This gets called after board-specific INIT_MACHINE, and initializes most
 277  * on-chip peripherals accessible on this board (except for few like USB):
 278  *
 279  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 280  *      code will have muxed GPIO pins and done "nonstandard" setup;
 281  *      that code could live in the boot loader.
 282  *  (b) Populating board-specific platform_data with the data drivers
 283  *      rely on to handle wiring variations.
 284  *  (c) Creating platform devices as meaningful on this board and
 285  *      with this kernel configuration.
 286  *
 287  * Claiming GPIOs, and setting their direction and initial values, is the
 288  * responsibility of the device drivers.  So is responding to probe().
 289  *
 290  * Board-specific knowlege like creating devices or pin setup is to be
 291  * kept out of drivers as much as possible.  In particular, pin setup
 292  * may be handled by the boot loader, and drivers should expect it will
 293  * normally have been done by the time they're probed.
 294  */
 295 static int __init omap_init_devices(void)
 296 {
 297         /* please keep these calls, and their implementations above,
 298          * in alphabetical order so they're easier to sort through.
 299          */
 300         omap_init_rng();
 301         omap_init_mcpdm();
 302         omap_init_uwire();
 303         omap_init_wdt();
 304         return 0;
 305 }
 306 arch_initcall(omap_init_devices);