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
  28
  29 void omap_nop_release(struct device *dev)
  30 {
  31         /* Nothing */
  32 }
  33
  34 /*-------------------------------------------------------------------------*/
  35
  36 #if     defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
  37
  38 #define OMAP1_I2C_BASE          0xfffb3800
  39 #define OMAP2_I2C_BASE1         0x48070000
  40 #define OMAP_I2C_SIZE           0x3f
  41 #define OMAP1_I2C_INT           INT_I2C
  42 #define OMAP2_I2C_INT1          56
  43
  44 static struct resource i2c_resources1[] = {
  45         {
  46                 .start          = 0,
  47                 .end            = 0,
  48                 .flags          = IORESOURCE_MEM,
  49         },
  50         {
  51                 .start          = 0,
  52                 .flags          = IORESOURCE_IRQ,
  53         },
  54 };
  55
  56 /* DMA not used; works around erratum writing to non-empty i2c fifo */
  57
  58 static struct platform_device omap_i2c_device1 = {
  59         .name           = "i2c_omap",
  60         .id             = 1,
  61         .dev = {
  62                 .release        = omap_nop_release,
  63         },
  64         .num_resources  = ARRAY_SIZE(i2c_resources1),
  65         .resource       = i2c_resources1,
  66 };
  67
  68 /* See also arch/arm/mach-omap2/devices.c for second I2C on 24xx */
  69 static void omap_init_i2c(void)
  70 {
  71         if (cpu_is_omap24xx()) {
  72                 i2c_resources1[0].start = OMAP2_I2C_BASE1;
  73                 i2c_resources1[0].end = OMAP2_I2C_BASE1 + OMAP_I2C_SIZE;
  74                 i2c_resources1[1].start = OMAP2_I2C_INT1;
  75         } else {
  76                 i2c_resources1[0].start = OMAP1_I2C_BASE;
  77                 i2c_resources1[0].end = OMAP1_I2C_BASE + OMAP_I2C_SIZE;
  78                 i2c_resources1[1].start = OMAP1_I2C_INT;
  79         }
  80
  81         /* FIXME define and use a boot tag, in case of boards that
  82          * either don't wire up I2C, or chips that mux it differently...
  83          * it can include clocking and address info, maybe more.
  84          */
  85         if (cpu_is_omap24xx()) {
  86                 omap_cfg_reg(M19_24XX_I2C1_SCL);
  87                 omap_cfg_reg(L15_24XX_I2C1_SDA);
  88         } else {
  89                 omap_cfg_reg(I2C_SCL);
  90                 omap_cfg_reg(I2C_SDA);
  91         }
  92
  93         (void) platform_device_register(&omap_i2c_device1);
  94 }
  95
  96 #else
  97 static inline void omap_init_i2c(void) {}
  98 #endif
  99
 100 /*-------------------------------------------------------------------------*/
 101
 102 #if     defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
 103
 104 #ifdef CONFIG_ARCH_OMAP24XX
 105 #define OMAP_MMC1_BASE          0x4809c000
 106 #define OMAP_MMC1_INT           83
 107 #else
 108 #define OMAP_MMC1_BASE          0xfffb7800
 109 #define OMAP_MMC1_INT           INT_MMC
 110 #endif
 111 #define OMAP_MMC2_BASE          0xfffb7c00      /* omap16xx only */
 112
 113 static struct omap_mmc_conf mmc1_conf;
 114
 115 static u64 mmc1_dmamask = 0xffffffff;
 116
 117 static struct resource mmc1_resources[] = {
 118         {
 119                 .start          = IO_ADDRESS(OMAP_MMC1_BASE),
 120                 .end            = IO_ADDRESS(OMAP_MMC1_BASE) + 0x7f,
 121                 .flags          = IORESOURCE_MEM,
 122         },
 123         {
 124                 .start          = OMAP_MMC1_INT,
 125                 .flags          = IORESOURCE_IRQ,
 126         },
 127 };
 128
 129 static struct platform_device mmc_omap_device1 = {
 130         .name           = "mmci-omap",
 131         .id             = 1,
 132         .dev = {
 133                 .release        = omap_nop_release,
 134                 .dma_mask       = &mmc1_dmamask,
 135                 .platform_data  = &mmc1_conf,
 136         },
 137         .num_resources  = ARRAY_SIZE(mmc1_resources),
 138         .resource       = mmc1_resources,
 139 };
 140
 141 #ifdef  CONFIG_ARCH_OMAP16XX
 142
 143 static struct omap_mmc_conf mmc2_conf;
 144
 145 static u64 mmc2_dmamask = 0xffffffff;
 146
 147 static struct resource mmc2_resources[] = {
 148         {
 149                 .start          = IO_ADDRESS(OMAP_MMC2_BASE),
 150                 .end            = IO_ADDRESS(OMAP_MMC2_BASE) + 0x7f,
 151                 .flags          = IORESOURCE_MEM,
 152         },
 153         {
 154                 .start          = INT_1610_MMC2,
 155                 .flags          = IORESOURCE_IRQ,
 156         },
 157 };
 158
 159 static struct platform_device mmc_omap_device2 = {
 160         .name           = "mmci-omap",
 161         .id             = 2,
 162         .dev = {
 163                 .release        = omap_nop_release,
 164                 .dma_mask       = &mmc2_dmamask,
 165                 .platform_data  = &mmc2_conf,
 166         },
 167         .num_resources  = ARRAY_SIZE(mmc2_resources),
 168         .resource       = mmc2_resources,
 169 };
 170 #endif
 171
 172 static void __init omap_init_mmc(void)
 173 {
 174         const struct omap_mmc_config    *mmc_conf;
 175         const struct omap_mmc_conf      *mmc;
 176
 177         /* NOTE:  assumes MMC was never (wrongly) enabled */
 178         mmc_conf = omap_get_config(OMAP_TAG_MMC, struct omap_mmc_config);
 179         if (!mmc_conf)
 180                 return;
 181
 182         /* block 1 is always available and has just one pinout option */
 183         mmc = &mmc_conf->mmc[0];
 184         if (mmc->enabled) {
 185                 if (!cpu_is_omap24xx()) {
 186                         omap_cfg_reg(MMC_CMD);
 187                         omap_cfg_reg(MMC_CLK);
 188                         omap_cfg_reg(MMC_DAT0);
 189                         if (cpu_is_omap1710()) {
 190                                 omap_cfg_reg(M15_1710_MMC_CLKI);
 191                                 omap_cfg_reg(P19_1710_MMC_CMDDIR);
 192                                 omap_cfg_reg(P20_1710_MMC_DATDIR0);
 193                         }
 194                 }
 195                 if (mmc->wire4) {
 196                         if (!cpu_is_omap24xx()) {
 197                                 omap_cfg_reg(MMC_DAT1);
 198                                 /* NOTE:  DAT2 can be on W10 (here) or M15 */
 199                                 if (!mmc->nomux)
 200                                         omap_cfg_reg(MMC_DAT2);
 201                                 omap_cfg_reg(MMC_DAT3);
 202                         }
 203                 }
 204                 mmc1_conf = *mmc;
 205                 (void) platform_device_register(&mmc_omap_device1);
 206         }
 207
 208 #ifdef  CONFIG_ARCH_OMAP16XX
 209         /* block 2 is on newer chips, and has many pinout options */
 210         mmc = &mmc_conf->mmc[1];
 211         if (mmc->enabled) {
 212                 if (!mmc->nomux) {
 213                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 214                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 215                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 216                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 217                         if (mmc->wire4) {
 218                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 219                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 220                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 221                         }
 222
 223                         /* These are needed for the level shifter */
 224                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 225                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 226                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 227                 }
 228
 229                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 230                 if (cpu_is_omap1710())
 231                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 232                                      MOD_CONF_CTRL_1);
 233                 mmc2_conf = *mmc;
 234                 (void) platform_device_register(&mmc_omap_device2);
 235         }
 236 #endif
 237         return;
 238 }
 239 #else
 240 static inline void omap_init_mmc(void) {}
 241 #endif
 242
 243 #if     defined(CONFIG_OMAP_WATCHDOG) || defined(CONFIG_OMAP_WATCHDOG_MODULE)
 244
 245 #ifdef CONFIG_ARCH_OMAP24XX
 246 #define OMAP_WDT_BASE           0x48022000
 247 #else
 248 #define OMAP_WDT_BASE           0xfffeb000
 249 #endif
 250
 251 static struct resource wdt_resources[] = {
 252         {
 253                 .start          = OMAP_WDT_BASE,
 254                 .end            = OMAP_WDT_BASE + 0x4f,
 255                 .flags          = IORESOURCE_MEM,
 256         },
 257 };
 258
 259 static struct platform_device omap_wdt_device = {
 260         .name      = "omap_wdt",
 261         .id          = -1,
 262         .dev = {
 263                 .release        = omap_nop_release,
 264         },
 265         .num_resources  = ARRAY_SIZE(wdt_resources),
 266         .resource       = wdt_resources,
 267 };
 268
 269 static void omap_init_wdt(void)
 270 {
 271         (void) platform_device_register(&omap_wdt_device);
 272 }
 273 #else
 274 static inline void omap_init_wdt(void) {}
 275 #endif
 276
 277 /*-------------------------------------------------------------------------*/
 278
 279 #if     defined(CONFIG_OMAP_RNG) || defined(CONFIG_OMAP_RNG_MODULE)
 280
 281 #ifdef CONFIG_ARCH_OMAP24XX
 282 #define OMAP_RNG_BASE           0x480A0000
 283 #else
 284 #define OMAP_RNG_BASE           0xfffe5000
 285 #endif
 286
 287 static struct resource rng_resources[] = {
 288         {
 289                 .start          = OMAP_RNG_BASE,
 290                 .end            = OMAP_RNG_BASE + 0x4f,
 291                 .flags          = IORESOURCE_MEM,
 292         },
 293 };
 294
 295 static struct platform_device omap_rng_device = {
 296         .name      = "omap_rng",
 297         .id          = -1,
 298         .dev = {
 299                 .release        = omap_nop_release,
 300         },
 301         .num_resources  = ARRAY_SIZE(rng_resources),
 302         .resource       = rng_resources,
 303 };
 304
 305 static void omap_init_rng(void)
 306 {
 307         (void) platform_device_register(&omap_rng_device);
 308 }
 309 #else
 310 static inline void omap_init_rng(void) {}
 311 #endif
 312
 313 #if defined(CONFIG_FB_OMAP) || defined(CONFIG_FB_OMAP_MODULE)
 314
 315 static struct omap_lcd_config omap_fb_conf;
 316
 317 static u64 omap_fb_dma_mask = ~(u32)0;
 318
 319 static struct platform_device omap_fb_device = {
 320         .name           = "omapfb",
 321         .id             = -1,
 322         .dev = {
 323                 .release                = omap_nop_release,
 324                 .dma_mask               = &omap_fb_dma_mask,
 325                 .coherent_dma_mask      = ~(u32)0,
 326                 .platform_data          = &omap_fb_conf,
 327         },
 328         .num_resources = 0,
 329 };
 330
 331 static inline void omap_init_fb(void)
 332 {
 333         const struct omap_lcd_config *conf;
 334
 335         conf = omap_get_config(OMAP_TAG_LCD, struct omap_lcd_config);
 336         if (conf != NULL)
 337                 omap_fb_conf = *conf;
 338         platform_device_register(&omap_fb_device);
 339 }
 340
 341 #else
 342
 343 static inline void omap_init_fb(void) {}
 344
 345 #endif
 346
 347 /*
 348  * This gets called after board-specific INIT_MACHINE, and initializes most
 349  * on-chip peripherals accessible on this board (except for few like USB):
 350  *
 351  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 352  *      code will have muxed GPIO pins and done "nonstandard" setup;
 353  *      that code could live in the boot loader.
 354  *  (b) Populating board-specific platform_data with the data drivers
 355  *      rely on to handle wiring variations.
 356  *  (c) Creating platform devices as meaningful on this board and
 357  *      with this kernel configuration.
 358  *
 359  * Claiming GPIOs, and setting their direction and initial values, is the
 360  * responsibility of the device drivers.  So is responding to probe().
 361  *
 362  * Board-specific knowlege like creating devices or pin setup is to be
 363  * kept out of drivers as much as possible.  In particular, pin setup
 364  * may be handled by the boot loader, and drivers should expect it will
 365  * normally have been done by the time they're probed.
 366  */
 367 static int __init omap_init_devices(void)
 368 {
 369         /* please keep these calls, and their implementations above,
 370          * in alphabetical order so they're easier to sort through.
 371          */
 372         omap_init_fb();
 373         omap_init_i2c();
 374         omap_init_mmc();
 375         omap_init_wdt();
 376         omap_init_rng();
 377
 378         return 0;
 379 }
 380 arch_initcall(omap_init_devices);
 381