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