arch/arm/mach-omap1/devices.c

   1 /*
   2  * linux/arch/arm/mach-omap1/devices.c
   3  *
   4  * OMAP1 platform device setup/initialization
   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 static 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 OMAP_I2C_BASE           0xfffb3800
  39
  40 static struct resource i2c_resources[] = {
  41         {
  42                 .start          = OMAP_I2C_BASE,
  43                 .end            = OMAP_I2C_BASE + 0x3f,
  44                 .flags          = IORESOURCE_MEM,
  45         },
  46         {
  47                 .start          = INT_I2C,
  48                 .flags          = IORESOURCE_IRQ,
  49         },
  50 };
  51
  52 /* DMA not used; works around erratum writing to non-empty i2c fifo */
  53
  54 static struct platform_device omap_i2c_device = {
  55         .name           = "i2c_omap",
  56         .id             = -1,
  57         .dev = {
  58                 .release        = omap_nop_release,
  59         },
  60         .num_resources  = ARRAY_SIZE(i2c_resources),
  61         .resource       = i2c_resources,
  62 };
  63
  64 static void omap_init_i2c(void)
  65 {
  66         /* FIXME define and use a boot tag, in case of boards that
  67          * either don't wire up I2C, or chips that mux it differently...
  68          * it can include clocking and address info, maybe more.
  69          */
  70         omap_cfg_reg(I2C_SCL);
  71         omap_cfg_reg(I2C_SDA);
  72
  73         (void) platform_device_register(&omap_i2c_device);
  74 }
  75 #else
  76 static inline void omap_init_i2c(void) {}
  77 #endif
  78
  79 /*-------------------------------------------------------------------------*/
  80
  81 #if     defined(CONFIG_OMAP1610_IR) || defined(CONFIG_OMAP161O_IR_MODULE)
  82
  83 static u64 irda_dmamask = 0xffffffff;
  84
  85 static struct platform_device omap1610ir_device = {
  86         .name = "omap1610-ir",
  87         .id = -1,
  88         .dev = {
  89                 .release        = omap_nop_release,
  90                 .dma_mask       = &irda_dmamask,
  91         },
  92 };
  93
  94 static void omap_init_irda(void)
  95 {
  96         /* FIXME define and use a boot tag, members something like:
  97          *  u8          uart;           // uart1, or uart3
  98          * ... but driver only handles uart3 for now
  99          *  s16         fir_sel;        // gpio for SIR vs FIR
 100          * ... may prefer a callback for SIR/MIR/FIR mode select;
 101          * while h2 uses a GPIO, H3 uses a gpio expander
 102          */
 103         if (machine_is_omap_h2()
 104                         || machine_is_omap_h3())
 105                 (void) platform_device_register(&omap1610ir_device);
 106 }
 107 #else
 108 static inline void omap_init_irda(void) {}
 109 #endif
 110
 111 /*-------------------------------------------------------------------------*/
 112
 113 #if     defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
 114
 115 #define OMAP_MMC1_BASE          0xfffb7800
 116 #define OMAP_MMC2_BASE          0xfffb7c00      /* omap16xx only */
 117
 118 static struct omap_mmc_conf mmc1_conf;
 119
 120 static u64 mmc1_dmamask = 0xffffffff;
 121
 122 static struct resource mmc1_resources[] = {
 123         {
 124                 .start          = IO_ADDRESS(OMAP_MMC1_BASE),
 125                 .end            = IO_ADDRESS(OMAP_MMC1_BASE) + 0x7f,
 126                 .flags          = IORESOURCE_MEM,
 127         },
 128         {
 129                 .start          = INT_MMC,
 130                 .flags          = IORESOURCE_IRQ,
 131         },
 132 };
 133
 134 static struct platform_device mmc_omap_device1 = {
 135         .name           = "mmci-omap",
 136         .id             = 1,
 137         .dev = {
 138                 .release        = omap_nop_release,
 139                 .dma_mask       = &mmc1_dmamask,
 140                 .platform_data  = &mmc1_conf,
 141         },
 142         .num_resources  = ARRAY_SIZE(mmc1_resources),
 143         .resource       = mmc1_resources,
 144 };
 145
 146 #ifdef  CONFIG_ARCH_OMAP16XX
 147
 148 static struct omap_mmc_conf mmc2_conf;
 149
 150 static u64 mmc2_dmamask = 0xffffffff;
 151
 152 static struct resource mmc2_resources[] = {
 153         {
 154                 .start          = IO_ADDRESS(OMAP_MMC2_BASE),
 155                 .end            = IO_ADDRESS(OMAP_MMC2_BASE) + 0x7f,
 156                 .flags          = IORESOURCE_MEM,
 157         },
 158         {
 159                 .start          = INT_1610_MMC2,
 160                 .flags          = IORESOURCE_IRQ,
 161         },
 162 };
 163
 164 static struct platform_device mmc_omap_device2 = {
 165         .name           = "mmci-omap",
 166         .id             = 2,
 167         .dev = {
 168                 .release        = omap_nop_release,
 169                 .dma_mask       = &mmc2_dmamask,
 170                 .platform_data  = &mmc2_conf,
 171         },
 172         .num_resources  = ARRAY_SIZE(mmc2_resources),
 173         .resource       = mmc2_resources,
 174 };
 175 #endif
 176
 177 static void __init omap_init_mmc(void)
 178 {
 179         const struct omap_mmc_config    *mmc_conf;
 180         const struct omap_mmc_conf      *mmc;
 181
 182         /* NOTE:  assumes MMC was never (wrongly) enabled */
 183         mmc_conf = omap_get_config(OMAP_TAG_MMC, struct omap_mmc_config);
 184         if (!mmc_conf)
 185                 return;
 186
 187         /* block 1 is always available and has just one pinout option */
 188         mmc = &mmc_conf->mmc[0];
 189         if (mmc->enabled) {
 190                 omap_cfg_reg(MMC_CMD);
 191                 omap_cfg_reg(MMC_CLK);
 192                 omap_cfg_reg(MMC_DAT0);
 193                 if (cpu_is_omap1710()) {
 194                       omap_cfg_reg(M15_1710_MMC_CLKI);
 195                       omap_cfg_reg(P19_1710_MMC_CMDDIR);
 196                       omap_cfg_reg(P20_1710_MMC_DATDIR0);
 197                 }
 198                 if (mmc->wire4) {
 199                         omap_cfg_reg(MMC_DAT1);
 200                         /* NOTE:  DAT2 can be on W10 (here) or M15 */
 201                         if (!mmc->nomux)
 202                                 omap_cfg_reg(MMC_DAT2);
 203                         omap_cfg_reg(MMC_DAT3);
 204                 }
 205                 mmc1_conf = *mmc;
 206                 (void) platform_device_register(&mmc_omap_device1);
 207         }
 208
 209 #ifdef  CONFIG_ARCH_OMAP16XX
 210         /* block 2 is on newer chips, and has many pinout options */
 211         mmc = &mmc_conf->mmc[1];
 212         if (mmc->enabled) {
 213                 if (!mmc->nomux) {
 214                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 215                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 216                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 217                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 218                         if (mmc->wire4) {
 219                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 220                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 221                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 222                         }
 223
 224                         /* These are needed for the level shifter */
 225                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 226                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 227                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 228                 }
 229
 230                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 231                 if (cpu_is_omap1710())
 232                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 233                                      MOD_CONF_CTRL_1);
 234                 mmc2_conf = *mmc;
 235                 (void) platform_device_register(&mmc_omap_device2);
 236         }
 237 #endif
 238         return;
 239 }
 240 #else
 241 static inline void omap_init_mmc(void) {}
 242 #endif
 243
 244 #if     defined(CONFIG_OMAP_RTC) || defined(CONFIG_OMAP_RTC)
 245
 246 #define OMAP_RTC_BASE           0xfffb4800
 247
 248 static struct resource rtc_resources[] = {
 249         {
 250                 .start          = OMAP_RTC_BASE,
 251                 .end            = OMAP_RTC_BASE + 0x5f,
 252                 .flags          = IORESOURCE_MEM,
 253         },
 254         {
 255                 .start          = INT_RTC_TIMER,
 256                 .flags          = IORESOURCE_IRQ,
 257         },
 258         {
 259                 .start          = INT_RTC_ALARM,
 260                 .flags          = IORESOURCE_IRQ,
 261         },
 262 };
 263
 264 static struct platform_device omap_rtc_device = {
 265         .name           = "omap_rtc",
 266         .id             = -1,
 267         .dev = {
 268                 .release        = omap_nop_release,
 269         },
 270         .num_resources  = ARRAY_SIZE(rtc_resources),
 271         .resource       = rtc_resources,
 272 };
 273
 274 static void omap_init_rtc(void)
 275 {
 276         (void) platform_device_register(&omap_rtc_device);
 277 }
 278 #else
 279 static inline void omap_init_rtc(void) {}
 280 #endif
 281
 282 /*-------------------------------------------------------------------------*/
 283
 284 #if     defined(CONFIG_OMAP16XX_WATCHDOG) || defined(CONFIG_OMAP16XX_WATCHDOG_MODULE)
 285
 286 #define OMAP_WDT_BASE           0xfffeb000
 287
 288 static struct resource wdt_resources[] = {
 289         {
 290                 .start          = OMAP_WDT_BASE,
 291                 .end            = OMAP_WDT_BASE + 0x4f,
 292                 .flags          = IORESOURCE_MEM,
 293         },
 294 };
 295
 296 static struct platform_device omap_wdt_device = {
 297         .name      = "omap1610_wdt",
 298         .id          = -1,
 299         .dev = {
 300                 .release        = omap_nop_release,
 301         },
 302         .num_resources  = ARRAY_SIZE(wdt_resources),
 303         .resource       = wdt_resources,
 304 };
 305
 306 static void omap_init_wdt(void)
 307 {
 308         (void) platform_device_register(&omap_wdt_device);
 309 }
 310 #else
 311 static inline void omap_init_wdt(void) {}
 312 #endif
 313
 314
 315 /*-------------------------------------------------------------------------*/
 316
 317 /*
 318  * This gets called after board-specific INIT_MACHINE, and initializes most
 319  * on-chip peripherals accessible on this board (except for few like USB):
 320  *
 321  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 322  *      code will have muxed GPIO pins and done "nonstandard" setup;
 323  *      that code could live in the boot loader.
 324  *  (b) Populating board-specific platform_data with the data drivers
 325  *      rely on to handle wiring variations.
 326  *  (c) Creating platform devices as meaningful on this board and
 327  *      with this kernel configuration.
 328  *
 329  * Claiming GPIOs, and setting their direction and initial values, is the
 330  * responsibility of the device drivers.  So is responding to probe().
 331  *
 332  * Board-specific knowlege like creating devices or pin setup is to be
 333  * kept out of drivers as much as possible.  In particular, pin setup
 334  * may be handled by the boot loader, and drivers should expect it will
 335  * normally have been done by the time they're probed.
 336  */
 337 static int __init omap_init_devices(void)
 338 {
 339         /* please keep these calls, and their implementations above,
 340          * in alphabetical order so they're easier to sort through.
 341          */
 342         omap_init_i2c();
 343         omap_init_irda();
 344         omap_init_mmc();
 345         omap_init_rtc();
 346         omap_init_wdt();
 347
 348         return 0;
 349 }
 350 arch_initcall(omap_init_devices);
 351