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 #include <plat/dma.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 #if defined(CONFIG_SOC_OMAP2420) || defined(CONFIG_SOC_OMAP2430)
  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_TI81XX
 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_AM33XX
 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        = L4_PER_44XX_VIRT,
 220                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 221                 .length         = L4_PER_44XX_SIZE,
 222                 .type           = MT_DEVICE,
 223         },
 224 #ifdef CONFIG_OMAP4_ERRATA_I688
 225         {
 226                 .virtual        = OMAP4_SRAM_VA,
 227                 .pfn            = __phys_to_pfn(OMAP4_SRAM_PA),
 228                 .length         = PAGE_SIZE,
 229                 .type           = MT_MEMORY_SO,
 230         },
 231 #endif
 232
 233 };
 234 #endif
 235
 236 #ifdef CONFIG_SOC_OMAP2420
 237 void __init omap242x_map_common_io(void)
 238 {
 239         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 240         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 241 }
 242 #endif
 243
 244 #ifdef CONFIG_SOC_OMAP2430
 245 void __init omap243x_map_common_io(void)
 246 {
 247         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 248         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 249 }
 250 #endif
 251
 252 #ifdef CONFIG_ARCH_OMAP3
 253 void __init omap34xx_map_common_io(void)
 254 {
 255         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 256 }
 257 #endif
 258
 259 #ifdef CONFIG_SOC_TI81XX
 260 void __init omapti81xx_map_common_io(void)
 261 {
 262         iotable_init(omapti81xx_io_desc, ARRAY_SIZE(omapti81xx_io_desc));
 263 }
 264 #endif
 265
 266 #ifdef CONFIG_SOC_AM33XX
 267 void __init omapam33xx_map_common_io(void)
 268 {
 269         iotable_init(omapam33xx_io_desc, ARRAY_SIZE(omapam33xx_io_desc));
 270 }
 271 #endif
 272
 273 #ifdef CONFIG_ARCH_OMAP4
 274 void __init omap44xx_map_common_io(void)
 275 {
 276         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 277         omap_barriers_init();
 278 }
 279 #endif
 280
 281 /*
 282  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 283  *
 284  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 285  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 286  * registers to the values currently defined by the kernel.  Currently
 287  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 288  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 289  * or passes along the return value of clk_set_rate().
 290  */
 291 static int __init _omap2_init_reprogram_sdrc(void)
 292 {
 293         struct clk *dpll3_m2_ck;
 294         int v = -EINVAL;
 295         long rate;
 296
 297         if (!cpu_is_omap34xx())
 298                 return 0;
 299
 300         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 301         if (IS_ERR(dpll3_m2_ck))
 302                 return -EINVAL;
 303
 304         rate = clk_get_rate(dpll3_m2_ck);
 305         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 306         v = clk_set_rate(dpll3_m2_ck, rate);
 307         if (v)
 308                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 309
 310         clk_put(dpll3_m2_ck);
 311
 312         return v;
 313 }
 314
 315 static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
 316 {
 317         return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
 318 }
 319
 320 static void __init omap_common_init_early(void)
 321 {
 322         omap_init_consistent_dma_size();
 323 }
 324
 325 static void __init omap_hwmod_init_postsetup(void)
 326 {
 327         u8 postsetup_state;
 328
 329         /* Set the default postsetup state for all hwmods */
 330 #ifdef CONFIG_PM_RUNTIME
 331         postsetup_state = _HWMOD_STATE_IDLE;
 332 #else
 333         postsetup_state = _HWMOD_STATE_ENABLED;
 334 #endif
 335         omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 336
 337         omap_pm_if_early_init();
 338 }
 339
 340 #ifdef CONFIG_SOC_OMAP2420
 341 void __init omap2420_init_early(void)
 342 {
 343         omap2_set_globals_242x();
 344         omap2xxx_check_revision();
 345         omap_common_init_early();
 346         omap2xxx_voltagedomains_init();
 347         omap242x_powerdomains_init();
 348         omap242x_clockdomains_init();
 349         omap2420_hwmod_init();
 350         omap_hwmod_init_postsetup();
 351         omap2420_clk_init();
 352 }
 353 #endif
 354
 355 #ifdef CONFIG_SOC_OMAP2430
 356 void __init omap2430_init_early(void)
 357 {
 358         omap2_set_globals_243x();
 359         omap2xxx_check_revision();
 360         omap_common_init_early();
 361         omap2xxx_voltagedomains_init();
 362         omap243x_powerdomains_init();
 363         omap243x_clockdomains_init();
 364         omap2430_hwmod_init();
 365         omap_hwmod_init_postsetup();
 366         omap2430_clk_init();
 367 }
 368 #endif
 369
 370 /*
 371  * Currently only board-omap3beagle.c should call this because of the
 372  * same machine_id for 34xx and 36xx beagle.. Will get fixed with DT.
 373  */
 374 #ifdef CONFIG_ARCH_OMAP3
 375 void __init omap3_init_early(void)
 376 {
 377         omap2_set_globals_3xxx();
 378         omap3xxx_check_revision();
 379         omap3xxx_check_features();
 380         omap_common_init_early();
 381         omap3xxx_voltagedomains_init();
 382         omap3xxx_powerdomains_init();
 383         omap3xxx_clockdomains_init();
 384         omap3xxx_hwmod_init();
 385         omap_hwmod_init_postsetup();
 386         omap3xxx_clk_init();
 387 }
 388
 389 void __init omap3430_init_early(void)
 390 {
 391         omap3_init_early();
 392 }
 393
 394 void __init omap35xx_init_early(void)
 395 {
 396         omap3_init_early();
 397 }
 398
 399 void __init omap3630_init_early(void)
 400 {
 401         omap3_init_early();
 402 }
 403
 404 void __init am35xx_init_early(void)
 405 {
 406         omap3_init_early();
 407 }
 408
 409 void __init ti81xx_init_early(void)
 410 {
 411         omap2_set_globals_ti81xx();
 412         omap3xxx_check_revision();
 413         ti81xx_check_features();
 414         omap_common_init_early();
 415         omap3xxx_voltagedomains_init();
 416         omap3xxx_powerdomains_init();
 417         omap3xxx_clockdomains_init();
 418         omap3xxx_hwmod_init();
 419         omap_hwmod_init_postsetup();
 420         omap3xxx_clk_init();
 421 }
 422 #endif
 423
 424 #ifdef CONFIG_ARCH_OMAP4
 425 void __init omap4430_init_early(void)
 426 {
 427         omap2_set_globals_443x();
 428         omap4xxx_check_revision();
 429         omap4xxx_check_features();
 430         omap_common_init_early();
 431         omap44xx_voltagedomains_init();
 432         omap44xx_powerdomains_init();
 433         omap44xx_clockdomains_init();
 434         omap44xx_hwmod_init();
 435         omap_hwmod_init_postsetup();
 436         omap4xxx_clk_init();
 437 }
 438 #endif
 439
 440 void __init omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
 441                                       struct omap_sdrc_params *sdrc_cs1)
 442 {
 443         omap_sram_init();
 444
 445         if (cpu_is_omap24xx() || omap3_has_sdrc()) {
 446                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 447                 _omap2_init_reprogram_sdrc();
 448         }
 449 }