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/dma-mapping.h>
  13 #include <linux/gpio.h>
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/spi/spi.h>
  19
  20 #include <linux/platform_data/omap-wd-timer.h>
  21
  22 #include <asm/mach/map.h>
  23
  24 #include <mach/tc.h>
  25 #include <mach/mux.h>
  26
  27 #include <mach/omap7xx.h>
  28 #include "camera.h"
  29 #include <mach/hardware.h>
  30
  31 #include "common.h"
  32 #include "clock.h"
  33 #include "mmc.h"
  34 #include "sram.h"
  35
  36 #if IS_ENABLED(CONFIG_RTC_DRV_OMAP)
  37
  38 #define OMAP_RTC_BASE           0xfffb4800
  39
  40 static struct resource rtc_resources[] = {
  41         {
  42                 .start          = OMAP_RTC_BASE,
  43                 .end            = OMAP_RTC_BASE + 0x5f,
  44                 .flags          = IORESOURCE_MEM,
  45         },
  46         {
  47                 .start          = INT_RTC_TIMER,
  48                 .flags          = IORESOURCE_IRQ,
  49         },
  50         {
  51                 .start          = INT_RTC_ALARM,
  52                 .flags          = IORESOURCE_IRQ,
  53         },
  54 };
  55
  56 static struct platform_device omap_rtc_device = {
  57         .name           = "omap_rtc",
  58         .id             = -1,
  59         .num_resources  = ARRAY_SIZE(rtc_resources),
  60         .resource       = rtc_resources,
  61 };
  62
  63 static void omap_init_rtc(void)
  64 {
  65         (void) platform_device_register(&omap_rtc_device);
  66 }
  67 #else
  68 static inline void omap_init_rtc(void) {}
  69 #endif
  70
  71 static inline void omap_init_mbox(void) { }
  72
  73 /*-------------------------------------------------------------------------*/
  74
  75 #if IS_ENABLED(CONFIG_MMC_OMAP)
  76
  77 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
  78                         int controller_nr)
  79 {
  80         if (controller_nr == 0) {
  81                 if (cpu_is_omap7xx()) {
  82                         omap_cfg_reg(MMC_7XX_CMD);
  83                         omap_cfg_reg(MMC_7XX_CLK);
  84                         omap_cfg_reg(MMC_7XX_DAT0);
  85                 } else {
  86                         omap_cfg_reg(MMC_CMD);
  87                         omap_cfg_reg(MMC_CLK);
  88                         omap_cfg_reg(MMC_DAT0);
  89                 }
  90
  91                 if (cpu_is_omap1710()) {
  92                         omap_cfg_reg(M15_1710_MMC_CLKI);
  93                         omap_cfg_reg(P19_1710_MMC_CMDDIR);
  94                         omap_cfg_reg(P20_1710_MMC_DATDIR0);
  95                 }
  96                 if (mmc_controller->slots[0].wires == 4 && !cpu_is_omap7xx()) {
  97                         omap_cfg_reg(MMC_DAT1);
  98                         /* NOTE: DAT2 can be on W10 (here) or M15 */
  99                         if (!mmc_controller->slots[0].nomux)
 100                                 omap_cfg_reg(MMC_DAT2);
 101                         omap_cfg_reg(MMC_DAT3);
 102                 }
 103         }
 104
 105         /* Block 2 is on newer chips, and has many pinout options */
 106         if (cpu_is_omap16xx() && controller_nr == 1) {
 107                 if (!mmc_controller->slots[1].nomux) {
 108                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 109                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 110                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 111                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 112                         if (mmc_controller->slots[1].wires == 4) {
 113                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 114                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 115                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 116                         }
 117
 118                         /* These are needed for the level shifter */
 119                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 120                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 121                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 122                 }
 123
 124                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 125                 if (cpu_is_omap1710())
 126                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 127                                         MOD_CONF_CTRL_1);
 128         }
 129 }
 130
 131 #define OMAP_MMC_NR_RES         4
 132
 133 /*
 134  * Register MMC devices.
 135  */
 136 static int __init omap_mmc_add(const char *name, int id, unsigned long base,
 137                                 unsigned long size, unsigned int irq,
 138                                 unsigned rx_req, unsigned tx_req,
 139                                 struct omap_mmc_platform_data *data)
 140 {
 141         struct platform_device *pdev;
 142         struct resource res[OMAP_MMC_NR_RES];
 143         int ret;
 144
 145         pdev = platform_device_alloc(name, id);
 146         if (!pdev)
 147                 return -ENOMEM;
 148
 149         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
 150         res[0].start = base;
 151         res[0].end = base + size - 1;
 152         res[0].flags = IORESOURCE_MEM;
 153         res[1].start = res[1].end = irq;
 154         res[1].flags = IORESOURCE_IRQ;
 155         res[2].start = rx_req;
 156         res[2].name = "rx";
 157         res[2].flags = IORESOURCE_DMA;
 158         res[3].start = tx_req;
 159         res[3].name = "tx";
 160         res[3].flags = IORESOURCE_DMA;
 161
 162         if (cpu_is_omap7xx())
 163                 data->slots[0].features = MMC_OMAP7XX;
 164         if (cpu_is_omap15xx())
 165                 data->slots[0].features = MMC_OMAP15XX;
 166         if (cpu_is_omap16xx())
 167                 data->slots[0].features = MMC_OMAP16XX;
 168
 169         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
 170         if (ret == 0)
 171                 ret = platform_device_add_data(pdev, data, sizeof(*data));
 172         if (ret)
 173                 goto fail;
 174
 175         ret = platform_device_add(pdev);
 176         if (ret)
 177                 goto fail;
 178
 179         /* return device handle to board setup code */
 180         data->dev = &pdev->dev;
 181         return 0;
 182
 183 fail:
 184         platform_device_put(pdev);
 185         return ret;
 186 }
 187
 188 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 189                         int nr_controllers)
 190 {
 191         int i;
 192
 193         for (i = 0; i < nr_controllers; i++) {
 194                 unsigned long base, size;
 195                 unsigned rx_req, tx_req;
 196                 unsigned int irq = 0;
 197
 198                 if (!mmc_data[i])
 199                         continue;
 200
 201                 omap1_mmc_mux(mmc_data[i], i);
 202
 203                 switch (i) {
 204                 case 0:
 205                         base = OMAP1_MMC1_BASE;
 206                         irq = INT_MMC;
 207                         rx_req = 22;
 208                         tx_req = 21;
 209                         break;
 210                 case 1:
 211                         if (!cpu_is_omap16xx())
 212                                 return;
 213                         base = OMAP1_MMC2_BASE;
 214                         irq = INT_1610_MMC2;
 215                         rx_req = 55;
 216                         tx_req = 54;
 217                         break;
 218                 default:
 219                         continue;
 220                 }
 221                 size = OMAP1_MMC_SIZE;
 222
 223                 omap_mmc_add("mmci-omap", i, base, size, irq,
 224                                 rx_req, tx_req, mmc_data[i]);
 225         }
 226 }
 227
 228 #endif
 229
 230 /*-------------------------------------------------------------------------*/
 231
 232 /* OMAP7xx SPI support */
 233 #if IS_ENABLED(CONFIG_SPI_OMAP_100K)
 234
 235 struct platform_device omap_spi1 = {
 236         .name           = "omap1_spi100k",
 237         .id             = 1,
 238 };
 239
 240 struct platform_device omap_spi2 = {
 241         .name           = "omap1_spi100k",
 242         .id             = 2,
 243 };
 244
 245 static void omap_init_spi100k(void)
 246 {
 247         if (!cpu_is_omap7xx())
 248                 return;
 249
 250         omap_spi1.dev.platform_data = ioremap(OMAP7XX_SPI1_BASE, 0x7ff);
 251         if (omap_spi1.dev.platform_data)
 252                 platform_device_register(&omap_spi1);
 253
 254         omap_spi2.dev.platform_data = ioremap(OMAP7XX_SPI2_BASE, 0x7ff);
 255         if (omap_spi2.dev.platform_data)
 256                 platform_device_register(&omap_spi2);
 257 }
 258
 259 #else
 260 static inline void omap_init_spi100k(void)
 261 {
 262 }
 263 #endif
 264
 265
 266 #define OMAP1_CAMERA_BASE       0xfffb6800
 267 #define OMAP1_CAMERA_IOSIZE     0x1c
 268
 269 static struct resource omap1_camera_resources[] = {
 270         [0] = {
 271                 .start  = OMAP1_CAMERA_BASE,
 272                 .end    = OMAP1_CAMERA_BASE + OMAP1_CAMERA_IOSIZE - 1,
 273                 .flags  = IORESOURCE_MEM,
 274         },
 275         [1] = {
 276                 .start  = INT_CAMERA,
 277                 .flags  = IORESOURCE_IRQ,
 278         },
 279 };
 280
 281 static u64 omap1_camera_dma_mask = DMA_BIT_MASK(32);
 282
 283 static struct platform_device omap1_camera_device = {
 284         .name           = "omap1-camera",
 285         .id             = 0, /* This is used to put cameras on this interface */
 286         .dev            = {
 287                 .dma_mask               = &omap1_camera_dma_mask,
 288                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 289         },
 290         .num_resources  = ARRAY_SIZE(omap1_camera_resources),
 291         .resource       = omap1_camera_resources,
 292 };
 293
 294 void __init omap1_camera_init(void *info)
 295 {
 296         struct platform_device *dev = &omap1_camera_device;
 297         int ret;
 298
 299         dev->dev.platform_data = info;
 300
 301         ret = platform_device_register(dev);
 302         if (ret)
 303                 dev_err(&dev->dev, "unable to register device: %d\n", ret);
 304 }
 305
 306
 307 /*-------------------------------------------------------------------------*/
 308
 309 static inline void omap_init_sti(void) {}
 310
 311 /* Numbering for the SPI-capable controllers when used for SPI:
 312  * spi          = 1
 313  * uwire        = 2
 314  * mmc1..2      = 3..4
 315  * mcbsp1..3    = 5..7
 316  */
 317
 318 #if IS_ENABLED(CONFIG_SPI_OMAP_UWIRE)
 319
 320 #define OMAP_UWIRE_BASE         0xfffb3000
 321
 322 static struct resource uwire_resources[] = {
 323         {
 324                 .start          = OMAP_UWIRE_BASE,
 325                 .end            = OMAP_UWIRE_BASE + 0x20,
 326                 .flags          = IORESOURCE_MEM,
 327         },
 328 };
 329
 330 static struct platform_device omap_uwire_device = {
 331         .name      = "omap_uwire",
 332         .id          = -1,
 333         .num_resources  = ARRAY_SIZE(uwire_resources),
 334         .resource       = uwire_resources,
 335 };
 336
 337 static void omap_init_uwire(void)
 338 {
 339         /* FIXME define and use a boot tag; not all boards will be hooking
 340          * up devices to the microwire controller, and multi-board configs
 341          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 342          */
 343
 344         /* board-specific code must configure chipselects (only a few
 345          * are normally used) and SCLK/SDI/SDO (each has two choices).
 346          */
 347         (void) platform_device_register(&omap_uwire_device);
 348 }
 349 #else
 350 static inline void omap_init_uwire(void) {}
 351 #endif
 352
 353
 354 #define OMAP1_RNG_BASE          0xfffe5000
 355
 356 static struct resource omap1_rng_resources[] = {
 357         {
 358                 .start          = OMAP1_RNG_BASE,
 359                 .end            = OMAP1_RNG_BASE + 0x4f,
 360                 .flags          = IORESOURCE_MEM,
 361         },
 362 };
 363
 364 static struct platform_device omap1_rng_device = {
 365         .name           = "omap_rng",
 366         .id             = -1,
 367         .num_resources  = ARRAY_SIZE(omap1_rng_resources),
 368         .resource       = omap1_rng_resources,
 369 };
 370
 371 static void omap1_init_rng(void)
 372 {
 373         if (!cpu_is_omap16xx())
 374                 return;
 375
 376         (void) platform_device_register(&omap1_rng_device);
 377 }
 378
 379 /*-------------------------------------------------------------------------*/
 380
 381 /*
 382  * This gets called after board-specific INIT_MACHINE, and initializes most
 383  * on-chip peripherals accessible on this board (except for few like USB):
 384  *
 385  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 386  *      code will have muxed GPIO pins and done "nonstandard" setup;
 387  *      that code could live in the boot loader.
 388  *  (b) Populating board-specific platform_data with the data drivers
 389  *      rely on to handle wiring variations.
 390  *  (c) Creating platform devices as meaningful on this board and
 391  *      with this kernel configuration.
 392  *
 393  * Claiming GPIOs, and setting their direction and initial values, is the
 394  * responsibility of the device drivers.  So is responding to probe().
 395  *
 396  * Board-specific knowledge like creating devices or pin setup is to be
 397  * kept out of drivers as much as possible.  In particular, pin setup
 398  * may be handled by the boot loader, and drivers should expect it will
 399  * normally have been done by the time they're probed.
 400  */
 401 static int __init omap1_init_devices(void)
 402 {
 403         if (!cpu_class_is_omap1())
 404                 return -ENODEV;
 405
 406         omap_sram_init();
 407         omap1_clk_late_init();
 408
 409         /* please keep these calls, and their implementations above,
 410          * in alphabetical order so they're easier to sort through.
 411          */
 412
 413         omap_init_mbox();
 414         omap_init_rtc();
 415         omap_init_spi100k();
 416         omap_init_sti();
 417         omap_init_uwire();
 418         omap1_init_rng();
 419
 420         return 0;
 421 }
 422 arch_initcall(omap1_init_devices);
 423
 424 #if IS_ENABLED(CONFIG_OMAP_WATCHDOG)
 425
 426 static struct resource wdt_resources[] = {
 427         {
 428                 .start          = 0xfffeb000,
 429                 .end            = 0xfffeb07F,
 430                 .flags          = IORESOURCE_MEM,
 431         },
 432 };
 433
 434 static struct platform_device omap_wdt_device = {
 435         .name           = "omap_wdt",
 436         .id             = -1,
 437         .num_resources  = ARRAY_SIZE(wdt_resources),
 438         .resource       = wdt_resources,
 439 };
 440
 441 static int __init omap_init_wdt(void)
 442 {
 443         struct omap_wd_timer_platform_data pdata;
 444         int ret;
 445
 446         if (!cpu_is_omap16xx())
 447                 return -ENODEV;
 448
 449         pdata.read_reset_sources = omap1_get_reset_sources;
 450
 451         ret = platform_device_register(&omap_wdt_device);
 452         if (!ret) {
 453                 ret = platform_device_add_data(&omap_wdt_device, &pdata,
 454                                                sizeof(pdata));
 455                 if (ret)
 456                         platform_device_del(&omap_wdt_device);
 457         }
 458
 459         return ret;
 460 }
 461 subsys_initcall(omap_init_wdt);
 462 #endif