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
  25 #include <asm/tlb.h>
  26 #include <asm/mach/map.h>
  27
  28 #include <plat/sram.h>
  29 #include <plat/sdrc.h>
  30 #include <plat/serial.h>
  31 #include <plat/omap-pm.h>
  32 #include <plat/omap_hwmod.h>
  33 #include <plat/multi.h>
  34
  35 #include "iomap.h"
  36 #include "voltage.h"
  37 #include "powerdomain.h"
  38 #include "clockdomain.h"
  39 #include "common.h"
  40 #include "clock2xxx.h"
  41 #include "clock3xxx.h"
  42 #include "clock44xx.h"
  43
  44 /*
  45  * The machine specific code may provide the extra mapping besides the
  46  * default mapping provided here.
  47  */
  48
  49 #if defined(CONFIG_SOC_OMAP2420) || defined(CONFIG_SOC_OMAP2430)
  50 static struct map_desc omap24xx_io_desc[] __initdata = {
  51         {
  52                 .virtual        = L3_24XX_VIRT,
  53                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  54                 .length         = L3_24XX_SIZE,
  55                 .type           = MT_DEVICE
  56         },
  57         {
  58                 .virtual        = L4_24XX_VIRT,
  59                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  60                 .length         = L4_24XX_SIZE,
  61                 .type           = MT_DEVICE
  62         },
  63 };
  64
  65 #ifdef CONFIG_SOC_OMAP2420
  66 static struct map_desc omap242x_io_desc[] __initdata = {
  67         {
  68                 .virtual        = DSP_MEM_2420_VIRT,
  69                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  70                 .length         = DSP_MEM_2420_SIZE,
  71                 .type           = MT_DEVICE
  72         },
  73         {
  74                 .virtual        = DSP_IPI_2420_VIRT,
  75                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  76                 .length         = DSP_IPI_2420_SIZE,
  77                 .type           = MT_DEVICE
  78         },
  79         {
  80                 .virtual        = DSP_MMU_2420_VIRT,
  81                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  82                 .length         = DSP_MMU_2420_SIZE,
  83                 .type           = MT_DEVICE
  84         },
  85 };
  86
  87 #endif
  88
  89 #ifdef CONFIG_SOC_OMAP2430
  90 static struct map_desc omap243x_io_desc[] __initdata = {
  91         {
  92                 .virtual        = L4_WK_243X_VIRT,
  93                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
  94                 .length         = L4_WK_243X_SIZE,
  95                 .type           = MT_DEVICE
  96         },
  97         {
  98                 .virtual        = OMAP243X_GPMC_VIRT,
  99                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 100                 .length         = OMAP243X_GPMC_SIZE,
 101                 .type           = MT_DEVICE
 102         },
 103         {
 104                 .virtual        = OMAP243X_SDRC_VIRT,
 105                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 106                 .length         = OMAP243X_SDRC_SIZE,
 107                 .type           = MT_DEVICE
 108         },
 109         {
 110                 .virtual        = OMAP243X_SMS_VIRT,
 111                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 112                 .length         = OMAP243X_SMS_SIZE,
 113                 .type           = MT_DEVICE
 114         },
 115 };
 116 #endif
 117 #endif
 118
 119 #ifdef  CONFIG_ARCH_OMAP3
 120 static struct map_desc omap34xx_io_desc[] __initdata = {
 121         {
 122                 .virtual        = L3_34XX_VIRT,
 123                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 124                 .length         = L3_34XX_SIZE,
 125                 .type           = MT_DEVICE
 126         },
 127         {
 128                 .virtual        = L4_34XX_VIRT,
 129                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 130                 .length         = L4_34XX_SIZE,
 131                 .type           = MT_DEVICE
 132         },
 133         {
 134                 .virtual        = OMAP34XX_GPMC_VIRT,
 135                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 136                 .length         = OMAP34XX_GPMC_SIZE,
 137                 .type           = MT_DEVICE
 138         },
 139         {
 140                 .virtual        = OMAP343X_SMS_VIRT,
 141                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 142                 .length         = OMAP343X_SMS_SIZE,
 143                 .type           = MT_DEVICE
 144         },
 145         {
 146                 .virtual        = OMAP343X_SDRC_VIRT,
 147                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 148                 .length         = OMAP343X_SDRC_SIZE,
 149                 .type           = MT_DEVICE
 150         },
 151         {
 152                 .virtual        = L4_PER_34XX_VIRT,
 153                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 154                 .length         = L4_PER_34XX_SIZE,
 155                 .type           = MT_DEVICE
 156         },
 157         {
 158                 .virtual        = L4_EMU_34XX_VIRT,
 159                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 160                 .length         = L4_EMU_34XX_SIZE,
 161                 .type           = MT_DEVICE
 162         },
 163 #if defined(CONFIG_DEBUG_LL) &&                                                 \
 164         (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
 165         {
 166                 .virtual        = ZOOM_UART_VIRT,
 167                 .pfn            = __phys_to_pfn(ZOOM_UART_BASE),
 168                 .length         = SZ_1M,
 169                 .type           = MT_DEVICE
 170         },
 171 #endif
 172 };
 173 #endif
 174
 175 #ifdef CONFIG_SOC_TI81XX
 176 static struct map_desc omapti81xx_io_desc[] __initdata = {
 177         {
 178                 .virtual        = L4_34XX_VIRT,
 179                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 180                 .length         = L4_34XX_SIZE,
 181                 .type           = MT_DEVICE
 182         }
 183 };
 184 #endif
 185
 186 #ifdef CONFIG_SOC_OMAPAM33XX
 187 static struct map_desc omapam33xx_io_desc[] __initdata = {
 188         {
 189                 .virtual        = L4_34XX_VIRT,
 190                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 191                 .length         = L4_34XX_SIZE,
 192                 .type           = MT_DEVICE
 193         },
 194         {
 195                 .virtual        = L4_WK_AM33XX_VIRT,
 196                 .pfn            = __phys_to_pfn(L4_WK_AM33XX_PHYS),
 197                 .length         = L4_WK_AM33XX_SIZE,
 198                 .type           = MT_DEVICE
 199         }
 200 };
 201 #endif
 202
 203 #ifdef  CONFIG_ARCH_OMAP4
 204 static struct map_desc omap44xx_io_desc[] __initdata = {
 205         {
 206                 .virtual        = L3_44XX_VIRT,
 207                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 208                 .length         = L3_44XX_SIZE,
 209                 .type           = MT_DEVICE,
 210         },
 211         {
 212                 .virtual        = L4_44XX_VIRT,
 213                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 214                 .length         = L4_44XX_SIZE,
 215                 .type           = MT_DEVICE,
 216         },
 217         {
 218                 .virtual        = OMAP44XX_GPMC_VIRT,
 219                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 220                 .length         = OMAP44XX_GPMC_SIZE,
 221                 .type           = MT_DEVICE,
 222         },
 223         {
 224                 .virtual        = OMAP44XX_EMIF1_VIRT,
 225                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 226                 .length         = OMAP44XX_EMIF1_SIZE,
 227                 .type           = MT_DEVICE,
 228         },
 229         {
 230                 .virtual        = OMAP44XX_EMIF2_VIRT,
 231                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 232                 .length         = OMAP44XX_EMIF2_SIZE,
 233                 .type           = MT_DEVICE,
 234         },
 235         {
 236                 .virtual        = OMAP44XX_DMM_VIRT,
 237                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 238                 .length         = OMAP44XX_DMM_SIZE,
 239                 .type           = MT_DEVICE,
 240         },
 241         {
 242                 .virtual        = L4_PER_44XX_VIRT,
 243                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 244                 .length         = L4_PER_44XX_SIZE,
 245                 .type           = MT_DEVICE,
 246         },
 247         {
 248                 .virtual        = L4_EMU_44XX_VIRT,
 249                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 250                 .length         = L4_EMU_44XX_SIZE,
 251                 .type           = MT_DEVICE,
 252         },
 253 #ifdef CONFIG_OMAP4_ERRATA_I688
 254         {
 255                 .virtual        = OMAP4_SRAM_VA,
 256                 .pfn            = __phys_to_pfn(OMAP4_SRAM_PA),
 257                 .length         = PAGE_SIZE,
 258                 .type           = MT_MEMORY_SO,
 259         },
 260 #endif
 261
 262 };
 263 #endif
 264
 265 #ifdef CONFIG_SOC_OMAP2420
 266 void __init omap242x_map_common_io(void)
 267 {
 268         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 269         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 270 }
 271 #endif
 272
 273 #ifdef CONFIG_SOC_OMAP2430
 274 void __init omap243x_map_common_io(void)
 275 {
 276         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 277         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 278 }
 279 #endif
 280
 281 #ifdef CONFIG_ARCH_OMAP3
 282 void __init omap34xx_map_common_io(void)
 283 {
 284         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 285 }
 286 #endif
 287
 288 #ifdef CONFIG_SOC_TI81XX
 289 void __init omapti81xx_map_common_io(void)
 290 {
 291         iotable_init(omapti81xx_io_desc, ARRAY_SIZE(omapti81xx_io_desc));
 292 }
 293 #endif
 294
 295 #ifdef CONFIG_SOC_OMAPAM33XX
 296 void __init omapam33xx_map_common_io(void)
 297 {
 298         iotable_init(omapam33xx_io_desc, ARRAY_SIZE(omapam33xx_io_desc));
 299 }
 300 #endif
 301
 302 #ifdef CONFIG_ARCH_OMAP4
 303 void __init omap44xx_map_common_io(void)
 304 {
 305         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 306         omap_barriers_init();
 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         omap_init_consistent_dma_size();
 352 }
 353
 354 static void __init omap_hwmod_init_postsetup(void)
 355 {
 356         u8 postsetup_state;
 357
 358         /* Set the default postsetup state for all hwmods */
 359 #ifdef CONFIG_PM_RUNTIME
 360         postsetup_state = _HWMOD_STATE_IDLE;
 361 #else
 362         postsetup_state = _HWMOD_STATE_ENABLED;
 363 #endif
 364         omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 365
 366         /*
 367          * Set the default postsetup state for unusual modules (like
 368          * MPU WDT).
 369          *
 370          * The postsetup_state is not actually used until
 371          * omap_hwmod_late_init(), so boards that desire full watchdog
 372          * coverage of kernel initialization can reprogram the
 373          * postsetup_state between the calls to
 374          * omap2_init_common_infra() and omap_sdrc_init().
 375          *
 376          * XXX ideally we could detect whether the MPU WDT was currently
 377          * enabled here and make this conditional
 378          */
 379         postsetup_state = _HWMOD_STATE_DISABLED;
 380         omap_hwmod_for_each_by_class("wd_timer",
 381                                      _set_hwmod_postsetup_state,
 382                                      &postsetup_state);
 383
 384         omap_pm_if_early_init();
 385 }
 386
 387 #ifdef CONFIG_SOC_OMAP2420
 388 void __init omap2420_init_early(void)
 389 {
 390         omap2_set_globals_242x();
 391         omap2xxx_check_revision();
 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         omap2xxx_check_revision();
 407         omap_common_init_early();
 408         omap2xxx_voltagedomains_init();
 409         omap243x_powerdomains_init();
 410         omap243x_clockdomains_init();
 411         omap2430_hwmod_init();
 412         omap_hwmod_init_postsetup();
 413         omap2430_clk_init();
 414 }
 415 #endif
 416
 417 /*
 418  * Currently only board-omap3beagle.c should call this because of the
 419  * same machine_id for 34xx and 36xx beagle.. Will get fixed with DT.
 420  */
 421 #ifdef CONFIG_ARCH_OMAP3
 422 void __init omap3_init_early(void)
 423 {
 424         omap2_set_globals_3xxx();
 425         omap3xxx_check_revision();
 426         omap3xxx_check_features();
 427         omap_common_init_early();
 428         omap3xxx_voltagedomains_init();
 429         omap3xxx_powerdomains_init();
 430         omap3xxx_clockdomains_init();
 431         omap3xxx_hwmod_init();
 432         omap_hwmod_init_postsetup();
 433         omap3xxx_clk_init();
 434 }
 435
 436 void __init omap3430_init_early(void)
 437 {
 438         omap3_init_early();
 439 }
 440
 441 void __init omap35xx_init_early(void)
 442 {
 443         omap3_init_early();
 444 }
 445
 446 void __init omap3630_init_early(void)
 447 {
 448         omap3_init_early();
 449 }
 450
 451 void __init am35xx_init_early(void)
 452 {
 453         omap3_init_early();
 454 }
 455
 456 void __init ti81xx_init_early(void)
 457 {
 458         omap2_set_globals_ti81xx();
 459         omap3xxx_check_revision();
 460         ti81xx_check_features();
 461         omap_common_init_early();
 462         omap3xxx_voltagedomains_init();
 463         omap3xxx_powerdomains_init();
 464         omap3xxx_clockdomains_init();
 465         omap3xxx_hwmod_init();
 466         omap_hwmod_init_postsetup();
 467         omap3xxx_clk_init();
 468 }
 469 #endif
 470
 471 #ifdef CONFIG_ARCH_OMAP4
 472 void __init omap4430_init_early(void)
 473 {
 474         omap2_set_globals_443x();
 475         omap4xxx_check_revision();
 476         omap4xxx_check_features();
 477         omap_common_init_early();
 478         omap44xx_voltagedomains_init();
 479         omap44xx_powerdomains_init();
 480         omap44xx_clockdomains_init();
 481         omap44xx_hwmod_init();
 482         omap_hwmod_init_postsetup();
 483         omap4xxx_clk_init();
 484 }
 485 #endif
 486
 487 void __init omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
 488                                       struct omap_sdrc_params *sdrc_cs1)
 489 {
 490         omap_sram_init();
 491
 492         if (cpu_is_omap24xx() || omap3_has_sdrc()) {
 493                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 494                 _omap2_init_reprogram_sdrc();
 495         }
 496 }