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/config.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17
  18 #include <asm/hardware.h>
  19 #include <asm/io.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/mach/map.h>
  22
  23 #include <asm/arch/tc.h>
  24 #include <asm/arch/board.h>
  25 #include <asm/arch/mux.h>
  26 #include <asm/arch/gpio.h>
  27 #include <asm/arch/menelaus.h>
  28
  29
  30 void omap_nop_release(struct device *dev)
  31 {
  32         /* Nothing */
  33 }
  34
  35 /*-------------------------------------------------------------------------*/
  36
  37 #if     defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
  38
  39 #define OMAP1_I2C_BASE          0xfffb3800
  40 #define OMAP2_I2C_BASE1         0x48070000
  41 #define OMAP_I2C_SIZE           0x3f
  42 #define OMAP1_I2C_INT           INT_I2C
  43 #define OMAP2_I2C_INT1          56
  44
  45 static struct resource i2c_resources1[] = {
  46         {
  47                 .start          = 0,
  48                 .end            = 0,
  49                 .flags          = IORESOURCE_MEM,
  50         },
  51         {
  52                 .start          = 0,
  53                 .flags          = IORESOURCE_IRQ,
  54         },
  55 };
  56
  57 /* DMA not used; works around erratum writing to non-empty i2c fifo */
  58
  59 static struct platform_device omap_i2c_device1 = {
  60         .name           = "i2c_omap",
  61         .id             = 1,
  62         .dev = {
  63                 .release        = omap_nop_release,
  64         },
  65         .num_resources  = ARRAY_SIZE(i2c_resources1),
  66         .resource       = i2c_resources1,
  67 };
  68
  69 /* See also arch/arm/mach-omap2/devices.c for second I2C on 24xx */
  70 static void omap_init_i2c(void)
  71 {
  72         if (cpu_is_omap24xx()) {
  73                 i2c_resources1[0].start = OMAP2_I2C_BASE1;
  74                 i2c_resources1[0].end = OMAP2_I2C_BASE1 + OMAP_I2C_SIZE;
  75                 i2c_resources1[1].start = OMAP2_I2C_INT1;
  76         } else {
  77                 i2c_resources1[0].start = OMAP1_I2C_BASE;
  78                 i2c_resources1[0].end = OMAP1_I2C_BASE + OMAP_I2C_SIZE;
  79                 i2c_resources1[1].start = OMAP1_I2C_INT;
  80         }
  81
  82         /* FIXME define and use a boot tag, in case of boards that
  83          * either don't wire up I2C, or chips that mux it differently...
  84          * it can include clocking and address info, maybe more.
  85          */
  86         if (cpu_is_omap24xx()) {
  87                 omap_cfg_reg(M19_24XX_I2C1_SCL);
  88                 omap_cfg_reg(L15_24XX_I2C1_SDA);
  89         } else {
  90                 omap_cfg_reg(I2C_SCL);
  91                 omap_cfg_reg(I2C_SDA);
  92         }
  93
  94         (void) platform_device_register(&omap_i2c_device1);
  95 }
  96
  97 #else
  98 static inline void omap_init_i2c(void) {}
  99 #endif
 100
 101 /*-------------------------------------------------------------------------*/
 102 #if     defined(CONFIG_KEYBOARD_OMAP) || defined(CONFIG_KEYBOARD_OMAP_MODULE)
 103
 104 static void omap_init_kp(void)
 105 {
 106         if (machine_is_omap_h2() || machine_is_omap_h3()) {
 107                 omap_cfg_reg(F18_1610_KBC0);
 108                 omap_cfg_reg(D20_1610_KBC1);
 109                 omap_cfg_reg(D19_1610_KBC2);
 110                 omap_cfg_reg(E18_1610_KBC3);
 111                 omap_cfg_reg(C21_1610_KBC4);
 112
 113                 omap_cfg_reg(G18_1610_KBR0);
 114                 omap_cfg_reg(F19_1610_KBR1);
 115                 omap_cfg_reg(H14_1610_KBR2);
 116                 omap_cfg_reg(E20_1610_KBR3);
 117                 omap_cfg_reg(E19_1610_KBR4);
 118                 omap_cfg_reg(N19_1610_KBR5);
 119         } else if (machine_is_omap_perseus2()) {
 120                 omap_cfg_reg(E2_730_KBR0);
 121                 omap_cfg_reg(J7_730_KBR1);
 122                 omap_cfg_reg(E1_730_KBR2);
 123                 omap_cfg_reg(F3_730_KBR3);
 124                 omap_cfg_reg(D2_730_KBR4);
 125
 126                 omap_cfg_reg(C2_730_KBC0);
 127                 omap_cfg_reg(D3_730_KBC1);
 128                 omap_cfg_reg(E4_730_KBC2);
 129                 omap_cfg_reg(F4_730_KBC3);
 130                 omap_cfg_reg(E3_730_KBC4);
 131         } else if (machine_is_omap_h4()) {
 132                 omap_cfg_reg(T19_24XX_KBR0);
 133                 omap_cfg_reg(R19_24XX_KBR1);
 134                 omap_cfg_reg(V18_24XX_KBR2);
 135                 omap_cfg_reg(M21_24XX_KBR3);
 136                 omap_cfg_reg(E5__24XX_KBR4);
 137                 if (omap_has_menelaus()) {
 138                         omap_cfg_reg(B3__24XX_KBR5);
 139                         omap_cfg_reg(AA4_24XX_KBC2);
 140                         omap_cfg_reg(B13_24XX_KBC6);
 141                 } else {
 142                         omap_cfg_reg(M18_24XX_KBR5);
 143                         omap_cfg_reg(H19_24XX_KBC2);
 144                         omap_cfg_reg(N19_24XX_KBC6);
 145                 }
 146                 omap_cfg_reg(R20_24XX_KBC0);
 147                 omap_cfg_reg(M14_24XX_KBC1);
 148                 omap_cfg_reg(V17_24XX_KBC3);
 149                 omap_cfg_reg(P21_24XX_KBC4);
 150                 omap_cfg_reg(L14_24XX_KBC5);
 151         }
 152 }
 153 #else
 154 static inline void omap_init_kp(void) {}
 155 #endif
 156
 157 /*-------------------------------------------------------------------------*/
 158
 159 #if     defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
 160
 161 #ifdef CONFIG_ARCH_OMAP24XX
 162 #define OMAP_MMC1_BASE          0x4809c000
 163 #define OMAP_MMC1_INT           83
 164 #else
 165 #define OMAP_MMC1_BASE          0xfffb7800
 166 #define OMAP_MMC1_INT           INT_MMC
 167 #endif
 168 #define OMAP_MMC2_BASE          0xfffb7c00      /* omap16xx only */
 169
 170 static struct omap_mmc_conf mmc1_conf;
 171
 172 static u64 mmc1_dmamask = 0xffffffff;
 173
 174 static struct resource mmc1_resources[] = {
 175         {
 176                 .start          = IO_ADDRESS(OMAP_MMC1_BASE),
 177                 .end            = IO_ADDRESS(OMAP_MMC1_BASE) + 0x7f,
 178                 .flags          = IORESOURCE_MEM,
 179         },
 180         {
 181                 .start          = OMAP_MMC1_INT,
 182                 .flags          = IORESOURCE_IRQ,
 183         },
 184 };
 185
 186 static struct platform_device mmc_omap_device1 = {
 187         .name           = "mmci-omap",
 188         .id             = 1,
 189         .dev = {
 190                 .release        = omap_nop_release,
 191                 .dma_mask       = &mmc1_dmamask,
 192                 .platform_data  = &mmc1_conf,
 193         },
 194         .num_resources  = ARRAY_SIZE(mmc1_resources),
 195         .resource       = mmc1_resources,
 196 };
 197
 198 #ifdef  CONFIG_ARCH_OMAP16XX
 199
 200 static struct omap_mmc_conf mmc2_conf;
 201
 202 static u64 mmc2_dmamask = 0xffffffff;
 203
 204 static struct resource mmc2_resources[] = {
 205         {
 206                 .start          = IO_ADDRESS(OMAP_MMC2_BASE),
 207                 .end            = IO_ADDRESS(OMAP_MMC2_BASE) + 0x7f,
 208                 .flags          = IORESOURCE_MEM,
 209         },
 210         {
 211                 .start          = INT_1610_MMC2,
 212                 .flags          = IORESOURCE_IRQ,
 213         },
 214 };
 215
 216 static struct platform_device mmc_omap_device2 = {
 217         .name           = "mmci-omap",
 218         .id             = 2,
 219         .dev = {
 220                 .release        = omap_nop_release,
 221                 .dma_mask       = &mmc2_dmamask,
 222                 .platform_data  = &mmc2_conf,
 223         },
 224         .num_resources  = ARRAY_SIZE(mmc2_resources),
 225         .resource       = mmc2_resources,
 226 };
 227 #endif
 228
 229 static void __init omap_init_mmc(void)
 230 {
 231         const struct omap_mmc_config    *mmc_conf;
 232         const struct omap_mmc_conf      *mmc;
 233
 234         /* NOTE:  assumes MMC was never (wrongly) enabled */
 235         mmc_conf = omap_get_config(OMAP_TAG_MMC, struct omap_mmc_config);
 236         if (!mmc_conf)
 237                 return;
 238
 239         /* block 1 is always available and has just one pinout option */
 240         mmc = &mmc_conf->mmc[0];
 241         if (mmc->enabled) {
 242                 if (!cpu_is_omap24xx()) {
 243                         omap_cfg_reg(MMC_CMD);
 244                         omap_cfg_reg(MMC_CLK);
 245                         omap_cfg_reg(MMC_DAT0);
 246                         if (cpu_is_omap1710()) {
 247                                 omap_cfg_reg(M15_1710_MMC_CLKI);
 248                                 omap_cfg_reg(P19_1710_MMC_CMDDIR);
 249                                 omap_cfg_reg(P20_1710_MMC_DATDIR0);
 250                         }
 251                 }
 252                 if (mmc->wire4) {
 253                         if (!cpu_is_omap24xx()) {
 254                                 omap_cfg_reg(MMC_DAT1);
 255                                 /* NOTE:  DAT2 can be on W10 (here) or M15 */
 256                                 if (!mmc->nomux)
 257                                         omap_cfg_reg(MMC_DAT2);
 258                                 omap_cfg_reg(MMC_DAT3);
 259                         }
 260                 }
 261                 mmc1_conf = *mmc;
 262                 (void) platform_device_register(&mmc_omap_device1);
 263         }
 264
 265 #ifdef  CONFIG_ARCH_OMAP16XX
 266         /* block 2 is on newer chips, and has many pinout options */
 267         mmc = &mmc_conf->mmc[1];
 268         if (mmc->enabled) {
 269                 if (!mmc->nomux) {
 270                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 271                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 272                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 273                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 274                         if (mmc->wire4) {
 275                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 276                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 277                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 278                         }
 279
 280                         /* These are needed for the level shifter */
 281                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 282                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 283                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 284                 }
 285
 286                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 287                 if (cpu_is_omap1710())
 288                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 289                                      MOD_CONF_CTRL_1);
 290                 mmc2_conf = *mmc;
 291                 (void) platform_device_register(&mmc_omap_device2);
 292         }
 293 #endif
 294         return;
 295 }
 296 #else
 297 static inline void omap_init_mmc(void) {}
 298 #endif
 299
 300 /*-------------------------------------------------------------------------*/
 301
 302 /* Numbering for the SPI-capable controllers when used for SPI:
 303  * spi          = 1
 304  * uwire        = 2
 305  * mmc1..2      = 3..4
 306  * mcbsp1..3    = 5..7
 307  */
 308
 309 #if defined(CONFIG_SPI_OMAP_UWIRE) || defined(CONFIG_SPI_OMAP_UWIRE_MODULE)
 310
 311 #define OMAP_UWIRE_BASE         0xfffb3000
 312
 313 static struct resource uwire_resources[] = {
 314         {
 315                 .start          = OMAP_UWIRE_BASE,
 316                 .end            = OMAP_UWIRE_BASE + 0x20,
 317                 .flags          = IORESOURCE_MEM,
 318         },
 319 };
 320
 321 static struct platform_device omap_uwire_device = {
 322         .name      = "omap_uwire",
 323         .id          = -1,
 324         .dev = {
 325                 .release        = omap_nop_release,
 326         },
 327         .num_resources  = ARRAY_SIZE(uwire_resources),
 328         .resource       = uwire_resources,
 329 };
 330
 331 static void omap_init_uwire(void)
 332 {
 333         /* FIXME define and use a boot tag; not all boards will be hooking
 334          * up devices to the microwire controller, and multi-board configs
 335          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 336          */
 337
 338         /* board-specific code must configure chipselects (only a few
 339          * are normally used) and SCLK/SDI/SDO (each has two choices).
 340          */
 341         (void) platform_device_register(&omap_uwire_device);
 342 }
 343 #else
 344 static inline void omap_init_uwire(void) {}
 345 #endif
 346
 347 /*-------------------------------------------------------------------------*/
 348
 349 #if     defined(CONFIG_OMAP_WATCHDOG) || defined(CONFIG_OMAP_WATCHDOG_MODULE)
 350
 351 #ifdef CONFIG_ARCH_OMAP24XX
 352 #define OMAP_WDT_BASE           0x48022000
 353 #else
 354 #define OMAP_WDT_BASE           0xfffeb000
 355 #endif
 356
 357 static struct resource wdt_resources[] = {
 358         {
 359                 .start          = OMAP_WDT_BASE,
 360                 .end            = OMAP_WDT_BASE + 0x4f,
 361                 .flags          = IORESOURCE_MEM,
 362         },
 363 };
 364
 365 static struct platform_device omap_wdt_device = {
 366         .name      = "omap_wdt",
 367         .id          = -1,
 368         .dev = {
 369                 .release        = omap_nop_release,
 370         },
 371         .num_resources  = ARRAY_SIZE(wdt_resources),
 372         .resource       = wdt_resources,
 373 };
 374
 375 static void omap_init_wdt(void)
 376 {
 377         (void) platform_device_register(&omap_wdt_device);
 378 }
 379 #else
 380 static inline void omap_init_wdt(void) {}
 381 #endif
 382
 383 /*-------------------------------------------------------------------------*/
 384
 385 #if     defined(CONFIG_OMAP_RNG) || defined(CONFIG_OMAP_RNG_MODULE)
 386
 387 #ifdef CONFIG_ARCH_OMAP24XX
 388 #define OMAP_RNG_BASE           0x480A0000
 389 #else
 390 #define OMAP_RNG_BASE           0xfffe5000
 391 #endif
 392
 393 static struct resource rng_resources[] = {
 394         {
 395                 .start          = OMAP_RNG_BASE,
 396                 .end            = OMAP_RNG_BASE + 0x4f,
 397                 .flags          = IORESOURCE_MEM,
 398         },
 399 };
 400
 401 static struct platform_device omap_rng_device = {
 402         .name      = "omap_rng",
 403         .id          = -1,
 404         .dev = {
 405                 .release        = omap_nop_release,
 406         },
 407         .num_resources  = ARRAY_SIZE(rng_resources),
 408         .resource       = rng_resources,
 409 };
 410
 411 static void omap_init_rng(void)
 412 {
 413         (void) platform_device_register(&omap_rng_device);
 414 }
 415 #else
 416 static inline void omap_init_rng(void) {}
 417 #endif
 418
 419 /*
 420  * This gets called after board-specific INIT_MACHINE, and initializes most
 421  * on-chip peripherals accessible on this board (except for few like USB):
 422  *
 423  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 424  *      code will have muxed GPIO pins and done "nonstandard" setup;
 425  *      that code could live in the boot loader.
 426  *  (b) Populating board-specific platform_data with the data drivers
 427  *      rely on to handle wiring variations.
 428  *  (c) Creating platform devices as meaningful on this board and
 429  *      with this kernel configuration.
 430  *
 431  * Claiming GPIOs, and setting their direction and initial values, is the
 432  * responsibility of the device drivers.  So is responding to probe().
 433  *
 434  * Board-specific knowlege like creating devices or pin setup is to be
 435  * kept out of drivers as much as possible.  In particular, pin setup
 436  * may be handled by the boot loader, and drivers should expect it will
 437  * normally have been done by the time they're probed.
 438  */
 439 static int __init omap_init_devices(void)
 440 {
 441         /* please keep these calls, and their implementations above,
 442          * in alphabetical order so they're easier to sort through.
 443          */
 444         omap_init_i2c();
 445         omap_init_kp();
 446         omap_init_mmc();
 447         omap_init_uwire();
 448         omap_init_wdt();
 449         omap_init_rng();
 450
 451         return 0;
 452 }
 453 arch_initcall(omap_init_devices);
 454