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