arch/arm/mach-omap2/io.c

   1 /*
   2  * linux/arch/arm/mach-omap2/io.c
   3  *
   4  * OMAP2 I/O mapping code
   5  *
   6  * Copyright (C) 2005 Nokia Corporation
   7  * Copyright (C) 2007-2009 Texas Instruments
   8  *
   9  * Author:
  10  *      Juha Yrjola <juha.yrjola@nokia.com>
  11  *      Syed Khasim <x0khasim@ti.com>
  12  *
  13  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License version 2 as
  17  * published by the Free Software Foundation.
  18  */
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/io.h>
  23 #include <linux/clk.h>
  24 #include <linux/omapfb.h>
  25
  26 #include <asm/tlb.h>
  27 #include <asm/mach/map.h>
  28
  29 #include <plat/sram.h>
  30 #include <plat/sdrc.h>
  31 #include <plat/serial.h>
  32 #include <plat/omap-pm.h>
  33 #include <plat/omap_hwmod.h>
  34 #include <plat/multi.h>
  35
  36 #include "iomap.h"
  37 #include "voltage.h"
  38 #include "powerdomain.h"
  39 #include "clockdomain.h"
  40 #include "common.h"
  41 #include "clock2xxx.h"
  42 #include "clock3xxx.h"
  43 #include "clock44xx.h"
  44
  45 /*
  46  * The machine specific code may provide the extra mapping besides the
  47  * default mapping provided here.
  48  */
  49
  50 #ifdef CONFIG_ARCH_OMAP2
  51 static struct map_desc omap24xx_io_desc[] __initdata = {
  52         {
  53                 .virtual        = L3_24XX_VIRT,
  54                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  55                 .length         = L3_24XX_SIZE,
  56                 .type           = MT_DEVICE
  57         },
  58         {
  59                 .virtual        = L4_24XX_VIRT,
  60                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  61                 .length         = L4_24XX_SIZE,
  62                 .type           = MT_DEVICE
  63         },
  64 };
  65
  66 #ifdef CONFIG_SOC_OMAP2420
  67 static struct map_desc omap242x_io_desc[] __initdata = {
  68         {
  69                 .virtual        = DSP_MEM_2420_VIRT,
  70                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  71                 .length         = DSP_MEM_2420_SIZE,
  72                 .type           = MT_DEVICE
  73         },
  74         {
  75                 .virtual        = DSP_IPI_2420_VIRT,
  76                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  77                 .length         = DSP_IPI_2420_SIZE,
  78                 .type           = MT_DEVICE
  79         },
  80         {
  81                 .virtual        = DSP_MMU_2420_VIRT,
  82                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  83                 .length         = DSP_MMU_2420_SIZE,
  84                 .type           = MT_DEVICE
  85         },
  86 };
  87
  88 #endif
  89
  90 #ifdef CONFIG_SOC_OMAP2430
  91 static struct map_desc omap243x_io_desc[] __initdata = {
  92         {
  93                 .virtual        = L4_WK_243X_VIRT,
  94                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
  95                 .length         = L4_WK_243X_SIZE,
  96                 .type           = MT_DEVICE
  97         },
  98         {
  99                 .virtual        = OMAP243X_GPMC_VIRT,
 100                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 101                 .length         = OMAP243X_GPMC_SIZE,
 102                 .type           = MT_DEVICE
 103         },
 104         {
 105                 .virtual        = OMAP243X_SDRC_VIRT,
 106                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 107                 .length         = OMAP243X_SDRC_SIZE,
 108                 .type           = MT_DEVICE
 109         },
 110         {
 111                 .virtual        = OMAP243X_SMS_VIRT,
 112                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 113                 .length         = OMAP243X_SMS_SIZE,
 114                 .type           = MT_DEVICE
 115         },
 116 };
 117 #endif
 118 #endif
 119
 120 #ifdef  CONFIG_ARCH_OMAP3
 121 static struct map_desc omap34xx_io_desc[] __initdata = {
 122         {
 123                 .virtual        = L3_34XX_VIRT,
 124                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 125                 .length         = L3_34XX_SIZE,
 126                 .type           = MT_DEVICE
 127         },
 128         {
 129                 .virtual        = L4_34XX_VIRT,
 130                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 131                 .length         = L4_34XX_SIZE,
 132                 .type           = MT_DEVICE
 133         },
 134         {
 135                 .virtual        = OMAP34XX_GPMC_VIRT,
 136                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 137                 .length         = OMAP34XX_GPMC_SIZE,
 138                 .type           = MT_DEVICE
 139         },
 140         {
 141                 .virtual        = OMAP343X_SMS_VIRT,
 142                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 143                 .length         = OMAP343X_SMS_SIZE,
 144                 .type           = MT_DEVICE
 145         },
 146         {
 147                 .virtual        = OMAP343X_SDRC_VIRT,
 148                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 149                 .length         = OMAP343X_SDRC_SIZE,
 150                 .type           = MT_DEVICE
 151         },
 152         {
 153                 .virtual        = L4_PER_34XX_VIRT,
 154                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 155                 .length         = L4_PER_34XX_SIZE,
 156                 .type           = MT_DEVICE
 157         },
 158         {
 159                 .virtual        = L4_EMU_34XX_VIRT,
 160                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 161                 .length         = L4_EMU_34XX_SIZE,
 162                 .type           = MT_DEVICE
 163         },
 164 #if defined(CONFIG_DEBUG_LL) &&                                                 \
 165         (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
 166         {
 167                 .virtual        = ZOOM_UART_VIRT,
 168                 .pfn            = __phys_to_pfn(ZOOM_UART_BASE),
 169                 .length         = SZ_1M,
 170                 .type           = MT_DEVICE
 171         },
 172 #endif
 173 };
 174 #endif
 175
 176 #ifdef CONFIG_SOC_OMAPTI81XX
 177 static struct map_desc omapti81xx_io_desc[] __initdata = {
 178         {
 179                 .virtual        = L4_34XX_VIRT,
 180                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 181                 .length         = L4_34XX_SIZE,
 182                 .type           = MT_DEVICE
 183         }
 184 };
 185 #endif
 186
 187 #ifdef CONFIG_SOC_OMAPAM33XX
 188 static struct map_desc omapam33xx_io_desc[] __initdata = {
 189         {
 190                 .virtual        = L4_34XX_VIRT,
 191                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 192                 .length         = L4_34XX_SIZE,
 193                 .type           = MT_DEVICE
 194         },
 195         {
 196                 .virtual        = L4_WK_AM33XX_VIRT,
 197                 .pfn            = __phys_to_pfn(L4_WK_AM33XX_PHYS),
 198                 .length         = L4_WK_AM33XX_SIZE,
 199                 .type           = MT_DEVICE
 200         }
 201 };
 202 #endif
 203
 204 #ifdef  CONFIG_ARCH_OMAP4
 205 static struct map_desc omap44xx_io_desc[] __initdata = {
 206         {
 207                 .virtual        = L3_44XX_VIRT,
 208                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 209                 .length         = L3_44XX_SIZE,
 210                 .type           = MT_DEVICE,
 211         },
 212         {
 213                 .virtual        = L4_44XX_VIRT,
 214                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 215                 .length         = L4_44XX_SIZE,
 216                 .type           = MT_DEVICE,
 217         },
 218         {
 219                 .virtual        = OMAP44XX_GPMC_VIRT,
 220                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 221                 .length         = OMAP44XX_GPMC_SIZE,
 222                 .type           = MT_DEVICE,
 223         },
 224         {
 225                 .virtual        = OMAP44XX_EMIF1_VIRT,
 226                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 227                 .length         = OMAP44XX_EMIF1_SIZE,
 228                 .type           = MT_DEVICE,
 229         },
 230         {
 231                 .virtual        = OMAP44XX_EMIF2_VIRT,
 232                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 233                 .length         = OMAP44XX_EMIF2_SIZE,
 234                 .type           = MT_DEVICE,
 235         },
 236         {
 237                 .virtual        = OMAP44XX_DMM_VIRT,
 238                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 239                 .length         = OMAP44XX_DMM_SIZE,
 240                 .type           = MT_DEVICE,
 241         },
 242         {
 243                 .virtual        = L4_PER_44XX_VIRT,
 244                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 245                 .length         = L4_PER_44XX_SIZE,
 246                 .type           = MT_DEVICE,
 247         },
 248         {
 249                 .virtual        = L4_EMU_44XX_VIRT,
 250                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 251                 .length         = L4_EMU_44XX_SIZE,
 252                 .type           = MT_DEVICE,
 253         },
 254 #ifdef CONFIG_OMAP4_ERRATA_I688
 255         {
 256                 .virtual        = OMAP4_SRAM_VA,
 257                 .pfn            = __phys_to_pfn(OMAP4_SRAM_PA),
 258                 .length         = PAGE_SIZE,
 259                 .type           = MT_MEMORY_SO,
 260         },
 261 #endif
 262
 263 };
 264 #endif
 265
 266 #ifdef CONFIG_SOC_OMAP2420
 267 void __init omap242x_map_common_io(void)
 268 {
 269         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 270         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 271 }
 272 #endif
 273
 274 #ifdef CONFIG_SOC_OMAP2430
 275 void __init omap243x_map_common_io(void)
 276 {
 277         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 278         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 279 }
 280 #endif
 281
 282 #ifdef CONFIG_ARCH_OMAP3
 283 void __init omap34xx_map_common_io(void)
 284 {
 285         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 286 }
 287 #endif
 288
 289 #ifdef CONFIG_SOC_OMAPTI81XX
 290 void __init omapti81xx_map_common_io(void)
 291 {
 292         iotable_init(omapti81xx_io_desc, ARRAY_SIZE(omapti81xx_io_desc));
 293 }
 294 #endif
 295
 296 #ifdef CONFIG_SOC_OMAPAM33XX
 297 void __init omapam33xx_map_common_io(void)
 298 {
 299         iotable_init(omapam33xx_io_desc, ARRAY_SIZE(omapam33xx_io_desc));
 300 }
 301 #endif
 302
 303 #ifdef CONFIG_ARCH_OMAP4
 304 void __init omap44xx_map_common_io(void)
 305 {
 306         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 307 }
 308 #endif
 309
 310 /*
 311  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 312  *
 313  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 314  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 315  * registers to the values currently defined by the kernel.  Currently
 316  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 317  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 318  * or passes along the return value of clk_set_rate().
 319  */
 320 static int __init _omap2_init_reprogram_sdrc(void)
 321 {
 322         struct clk *dpll3_m2_ck;
 323         int v = -EINVAL;
 324         long rate;
 325
 326         if (!cpu_is_omap34xx())
 327                 return 0;
 328
 329         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 330         if (IS_ERR(dpll3_m2_ck))
 331                 return -EINVAL;
 332
 333         rate = clk_get_rate(dpll3_m2_ck);
 334         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 335         v = clk_set_rate(dpll3_m2_ck, rate);
 336         if (v)
 337                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 338
 339         clk_put(dpll3_m2_ck);
 340
 341         return v;
 342 }
 343
 344 static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
 345 {
 346         return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
 347 }
 348
 349 static void __init omap_common_init_early(void)
 350 {
 351         omap2_check_revision();
 352         omap_init_consistent_dma_size();
 353 }
 354
 355 static void __init omap_hwmod_init_postsetup(void)
 356 {
 357         u8 postsetup_state;
 358
 359         /* Set the default postsetup state for all hwmods */
 360 #ifdef CONFIG_PM_RUNTIME
 361         postsetup_state = _HWMOD_STATE_IDLE;
 362 #else
 363         postsetup_state = _HWMOD_STATE_ENABLED;
 364 #endif
 365         omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 366
 367         /*
 368          * Set the default postsetup state for unusual modules (like
 369          * MPU WDT).
 370          *
 371          * The postsetup_state is not actually used until
 372          * omap_hwmod_late_init(), so boards that desire full watchdog
 373          * coverage of kernel initialization can reprogram the
 374          * postsetup_state between the calls to
 375          * omap2_init_common_infra() and omap_sdrc_init().
 376          *
 377          * XXX ideally we could detect whether the MPU WDT was currently
 378          * enabled here and make this conditional
 379          */
 380         postsetup_state = _HWMOD_STATE_DISABLED;
 381         omap_hwmod_for_each_by_class("wd_timer",
 382                                      _set_hwmod_postsetup_state,
 383                                      &postsetup_state);
 384
 385         omap_pm_if_early_init();
 386 }
 387
 388 #ifdef CONFIG_SOC_OMAP2420
 389 void __init omap2420_init_early(void)
 390 {
 391         omap2_set_globals_242x();
 392         omap_common_init_early();
 393         omap2xxx_voltagedomains_init();
 394         omap242x_powerdomains_init();
 395         omap242x_clockdomains_init();
 396         omap2420_hwmod_init();
 397         omap_hwmod_init_postsetup();
 398         omap2420_clk_init();
 399 }
 400 #endif
 401
 402 #ifdef CONFIG_SOC_OMAP2430
 403 void __init omap2430_init_early(void)
 404 {
 405         omap2_set_globals_243x();
 406         omap_common_init_early();
 407         omap2xxx_voltagedomains_init();
 408         omap243x_powerdomains_init();
 409         omap243x_clockdomains_init();
 410         omap2430_hwmod_init();
 411         omap_hwmod_init_postsetup();
 412         omap2430_clk_init();
 413 }
 414 #endif
 415
 416 /*
 417  * Currently only board-omap3beagle.c should call this because of the
 418  * same machine_id for 34xx and 36xx beagle.. Will get fixed with DT.
 419  */
 420 #ifdef CONFIG_ARCH_OMAP3
 421 void __init omap3_init_early(void)
 422 {
 423         omap2_set_globals_3xxx();
 424         omap_common_init_early();
 425         omap3xxx_voltagedomains_init();
 426         omap3xxx_powerdomains_init();
 427         omap3xxx_clockdomains_init();
 428         omap3xxx_hwmod_init();
 429         omap_hwmod_init_postsetup();
 430         omap3xxx_clk_init();
 431 }
 432
 433 void __init omap3430_init_early(void)
 434 {
 435         omap3_init_early();
 436 }
 437
 438 void __init omap35xx_init_early(void)
 439 {
 440         omap3_init_early();
 441 }
 442
 443 void __init omap3630_init_early(void)
 444 {
 445         omap3_init_early();
 446 }
 447
 448 void __init am35xx_init_early(void)
 449 {
 450         omap3_init_early();
 451 }
 452
 453 void __init ti81xx_init_early(void)
 454 {
 455         omap2_set_globals_ti81xx();
 456         omap_common_init_early();
 457         omap3xxx_voltagedomains_init();
 458         omap3xxx_powerdomains_init();
 459         omap3xxx_clockdomains_init();
 460         omap3xxx_hwmod_init();
 461         omap_hwmod_init_postsetup();
 462         omap3xxx_clk_init();
 463 }
 464 #endif
 465
 466 #ifdef CONFIG_ARCH_OMAP4
 467 void __init omap4430_init_early(void)
 468 {
 469         omap2_set_globals_443x();
 470         omap_common_init_early();
 471         omap44xx_voltagedomains_init();
 472         omap44xx_powerdomains_init();
 473         omap44xx_clockdomains_init();
 474         omap44xx_hwmod_init();
 475         omap_hwmod_init_postsetup();
 476         omap4xxx_clk_init();
 477 }
 478 #endif
 479
 480 void __init omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
 481                                       struct omap_sdrc_params *sdrc_cs1)
 482 {
 483         omap_sram_init();
 484
 485         if (cpu_is_omap24xx() || omap3_has_sdrc()) {
 486                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 487                 _omap2_init_reprogram_sdrc();
 488         }
 489 }