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
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/io.h>
  24 #include <linux/clk.h>
  25 #include <linux/omapfb.h>
  26
  27 #include <asm/tlb.h>
  28
  29 #include <asm/mach/map.h>
  30
  31 #include <plat/sram.h>
  32 #include <plat/sdrc.h>
  33 #include <plat/serial.h>
  34
  35 #include "clock2xxx.h"
  36 #include "clock3xxx.h"
  37 #include "clock44xx.h"
  38
  39 #include <plat/common.h>
  40 #include <plat/omap-pm.h>
  41 #include "voltage.h"
  42 #include "powerdomain.h"
  43
  44 #include "clockdomain.h"
  45 #include <plat/omap_hwmod.h>
  46 #include <plat/multi.h>
  47 #include <plat/common.h>
  48
  49 /*
  50  * The machine specific code may provide the extra mapping besides the
  51  * default mapping provided here.
  52  */
  53
  54 #ifdef CONFIG_ARCH_OMAP2
  55 static struct map_desc omap24xx_io_desc[] __initdata = {
  56         {
  57                 .virtual        = L3_24XX_VIRT,
  58                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  59                 .length         = L3_24XX_SIZE,
  60                 .type           = MT_DEVICE
  61         },
  62         {
  63                 .virtual        = L4_24XX_VIRT,
  64                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  65                 .length         = L4_24XX_SIZE,
  66                 .type           = MT_DEVICE
  67         },
  68 };
  69
  70 #ifdef CONFIG_SOC_OMAP2420
  71 static struct map_desc omap242x_io_desc[] __initdata = {
  72         {
  73                 .virtual        = DSP_MEM_2420_VIRT,
  74                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  75                 .length         = DSP_MEM_2420_SIZE,
  76                 .type           = MT_DEVICE
  77         },
  78         {
  79                 .virtual        = DSP_IPI_2420_VIRT,
  80                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  81                 .length         = DSP_IPI_2420_SIZE,
  82                 .type           = MT_DEVICE
  83         },
  84         {
  85                 .virtual        = DSP_MMU_2420_VIRT,
  86                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  87                 .length         = DSP_MMU_2420_SIZE,
  88                 .type           = MT_DEVICE
  89         },
  90 };
  91
  92 #endif
  93
  94 #ifdef CONFIG_SOC_OMAP2430
  95 static struct map_desc omap243x_io_desc[] __initdata = {
  96         {
  97                 .virtual        = L4_WK_243X_VIRT,
  98                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
  99                 .length         = L4_WK_243X_SIZE,
 100                 .type           = MT_DEVICE
 101         },
 102         {
 103                 .virtual        = OMAP243X_GPMC_VIRT,
 104                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 105                 .length         = OMAP243X_GPMC_SIZE,
 106                 .type           = MT_DEVICE
 107         },
 108         {
 109                 .virtual        = OMAP243X_SDRC_VIRT,
 110                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 111                 .length         = OMAP243X_SDRC_SIZE,
 112                 .type           = MT_DEVICE
 113         },
 114         {
 115                 .virtual        = OMAP243X_SMS_VIRT,
 116                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 117                 .length         = OMAP243X_SMS_SIZE,
 118                 .type           = MT_DEVICE
 119         },
 120 };
 121 #endif
 122 #endif
 123
 124 #ifdef  CONFIG_ARCH_OMAP3
 125 static struct map_desc omap34xx_io_desc[] __initdata = {
 126         {
 127                 .virtual        = L3_34XX_VIRT,
 128                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 129                 .length         = L3_34XX_SIZE,
 130                 .type           = MT_DEVICE
 131         },
 132         {
 133                 .virtual        = L4_34XX_VIRT,
 134                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 135                 .length         = L4_34XX_SIZE,
 136                 .type           = MT_DEVICE
 137         },
 138         {
 139                 .virtual        = OMAP34XX_GPMC_VIRT,
 140                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 141                 .length         = OMAP34XX_GPMC_SIZE,
 142                 .type           = MT_DEVICE
 143         },
 144         {
 145                 .virtual        = OMAP343X_SMS_VIRT,
 146                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 147                 .length         = OMAP343X_SMS_SIZE,
 148                 .type           = MT_DEVICE
 149         },
 150         {
 151                 .virtual        = OMAP343X_SDRC_VIRT,
 152                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 153                 .length         = OMAP343X_SDRC_SIZE,
 154                 .type           = MT_DEVICE
 155         },
 156         {
 157                 .virtual        = L4_PER_34XX_VIRT,
 158                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 159                 .length         = L4_PER_34XX_SIZE,
 160                 .type           = MT_DEVICE
 161         },
 162         {
 163                 .virtual        = L4_EMU_34XX_VIRT,
 164                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 165                 .length         = L4_EMU_34XX_SIZE,
 166                 .type           = MT_DEVICE
 167         },
 168 #if defined(CONFIG_DEBUG_LL) &&                                                 \
 169         (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
 170         {
 171                 .virtual        = ZOOM_UART_VIRT,
 172                 .pfn            = __phys_to_pfn(ZOOM_UART_BASE),
 173                 .length         = SZ_1M,
 174                 .type           = MT_DEVICE
 175         },
 176 #endif
 177 };
 178 #endif
 179
 180 #ifdef CONFIG_SOC_OMAPTI816X
 181 static struct map_desc omapti816x_io_desc[] __initdata = {
 182         {
 183                 .virtual        = L4_34XX_VIRT,
 184                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 185                 .length         = L4_34XX_SIZE,
 186                 .type           = MT_DEVICE
 187         },
 188 };
 189 #endif
 190
 191 #ifdef  CONFIG_ARCH_OMAP4
 192 static struct map_desc omap44xx_io_desc[] __initdata = {
 193         {
 194                 .virtual        = L3_44XX_VIRT,
 195                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 196                 .length         = L3_44XX_SIZE,
 197                 .type           = MT_DEVICE,
 198         },
 199         {
 200                 .virtual        = L4_44XX_VIRT,
 201                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 202                 .length         = L4_44XX_SIZE,
 203                 .type           = MT_DEVICE,
 204         },
 205         {
 206                 .virtual        = OMAP44XX_GPMC_VIRT,
 207                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 208                 .length         = OMAP44XX_GPMC_SIZE,
 209                 .type           = MT_DEVICE,
 210         },
 211         {
 212                 .virtual        = OMAP44XX_EMIF1_VIRT,
 213                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 214                 .length         = OMAP44XX_EMIF1_SIZE,
 215                 .type           = MT_DEVICE,
 216         },
 217         {
 218                 .virtual        = OMAP44XX_EMIF2_VIRT,
 219                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 220                 .length         = OMAP44XX_EMIF2_SIZE,
 221                 .type           = MT_DEVICE,
 222         },
 223         {
 224                 .virtual        = OMAP44XX_DMM_VIRT,
 225                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 226                 .length         = OMAP44XX_DMM_SIZE,
 227                 .type           = MT_DEVICE,
 228         },
 229         {
 230                 .virtual        = L4_PER_44XX_VIRT,
 231                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 232                 .length         = L4_PER_44XX_SIZE,
 233                 .type           = MT_DEVICE,
 234         },
 235         {
 236                 .virtual        = L4_EMU_44XX_VIRT,
 237                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 238                 .length         = L4_EMU_44XX_SIZE,
 239                 .type           = MT_DEVICE,
 240         },
 241 };
 242 #endif
 243
 244 #ifdef CONFIG_SOC_OMAP2420
 245 void __init omap242x_map_common_io(void)
 246 {
 247         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 248         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 249 }
 250 #endif
 251
 252 #ifdef CONFIG_SOC_OMAP2430
 253 void __init omap243x_map_common_io(void)
 254 {
 255         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 256         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 257 }
 258 #endif
 259
 260 #ifdef CONFIG_ARCH_OMAP3
 261 void __init omap34xx_map_common_io(void)
 262 {
 263         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 264 }
 265 #endif
 266
 267 #ifdef CONFIG_SOC_OMAPTI816X
 268 void __init omapti816x_map_common_io(void)
 269 {
 270         iotable_init(omapti816x_io_desc, ARRAY_SIZE(omapti816x_io_desc));
 271 }
 272 #endif
 273
 274 #ifdef CONFIG_ARCH_OMAP4
 275 void __init omap44xx_map_common_io(void)
 276 {
 277         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 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 /* See irq.c, omap4-common.c and entry-macro.S */
 321 void __iomem *omap_irq_base;
 322
 323 static void __init omap_common_init_early(void)
 324 {
 325         omap2_check_revision();
 326         omap_ioremap_init();
 327 }
 328
 329 static void __init omap_hwmod_init_postsetup(void)
 330 {
 331         u8 postsetup_state;
 332
 333         /* Set the default postsetup state for all hwmods */
 334 #ifdef CONFIG_PM_RUNTIME
 335         postsetup_state = _HWMOD_STATE_IDLE;
 336 #else
 337         postsetup_state = _HWMOD_STATE_ENABLED;
 338 #endif
 339         omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 340
 341         /*
 342          * Set the default postsetup state for unusual modules (like
 343          * MPU WDT).
 344          *
 345          * The postsetup_state is not actually used until
 346          * omap_hwmod_late_init(), so boards that desire full watchdog
 347          * coverage of kernel initialization can reprogram the
 348          * postsetup_state between the calls to
 349          * omap2_init_common_infra() and omap_sdrc_init().
 350          *
 351          * XXX ideally we could detect whether the MPU WDT was currently
 352          * enabled here and make this conditional
 353          */
 354         postsetup_state = _HWMOD_STATE_DISABLED;
 355         omap_hwmod_for_each_by_class("wd_timer",
 356                                      _set_hwmod_postsetup_state,
 357                                      &postsetup_state);
 358
 359         omap_pm_if_early_init();
 360 }
 361
 362 void __init omap2420_init_early(void)
 363 {
 364         omap2_set_globals_242x();
 365         omap_common_init_early();
 366         omap2xxx_voltagedomains_init();
 367         omap242x_powerdomains_init();
 368         omap242x_clockdomains_init();
 369         omap2420_hwmod_init();
 370         omap_hwmod_init_postsetup();
 371         omap2420_clk_init();
 372 }
 373
 374 void __init omap2430_init_early(void)
 375 {
 376         omap2_set_globals_243x();
 377         omap_common_init_early();
 378         omap2xxx_voltagedomains_init();
 379         omap243x_powerdomains_init();
 380         omap243x_clockdomains_init();
 381         omap2430_hwmod_init();
 382         omap_hwmod_init_postsetup();
 383         omap2430_clk_init();
 384 }
 385
 386 /*
 387  * Currently only board-omap3beagle.c should call this because of the
 388  * same machine_id for 34xx and 36xx beagle.. Will get fixed with DT.
 389  */
 390 void __init omap3_init_early(void)
 391 {
 392         omap2_set_globals_3xxx();
 393         omap_common_init_early();
 394         omap3xxx_voltagedomains_init();
 395         omap3xxx_powerdomains_init();
 396         omap3xxx_clockdomains_init();
 397         omap3xxx_hwmod_init();
 398         omap_hwmod_init_postsetup();
 399         omap3xxx_clk_init();
 400 }
 401
 402 void __init omap3430_init_early(void)
 403 {
 404         omap3_init_early();
 405 }
 406
 407 void __init omap35xx_init_early(void)
 408 {
 409         omap3_init_early();
 410 }
 411
 412 void __init omap3630_init_early(void)
 413 {
 414         omap3_init_early();
 415 }
 416
 417 void __init am35xx_init_early(void)
 418 {
 419         omap3_init_early();
 420 }
 421
 422 void __init ti816x_init_early(void)
 423 {
 424         omap2_set_globals_ti816x();
 425         omap_common_init_early();
 426         omap3xxx_voltagedomains_init();
 427         omap3xxx_powerdomains_init();
 428         omap3xxx_clockdomains_init();
 429         omap3xxx_hwmod_init();
 430         omap_hwmod_init_postsetup();
 431         omap3xxx_clk_init();
 432 }
 433
 434 void __init omap4430_init_early(void)
 435 {
 436         omap2_set_globals_443x();
 437         omap_common_init_early();
 438         omap44xx_voltagedomains_init();
 439         omap44xx_powerdomains_init();
 440         omap44xx_clockdomains_init();
 441         omap44xx_hwmod_init();
 442         omap_hwmod_init_postsetup();
 443         omap4xxx_clk_init();
 444 }
 445
 446 void __init omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
 447                                       struct omap_sdrc_params *sdrc_cs1)
 448 {
 449         omap_sram_init();
 450
 451         if (cpu_is_omap24xx() || omap3_has_sdrc()) {
 452                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 453                 _omap2_init_reprogram_sdrc();
 454         }
 455 }
 456
 457 /*
 458  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 459  */
 460
 461 u8 omap_readb(u32 pa)
 462 {
 463         return __raw_readb(OMAP2_L4_IO_ADDRESS(pa));
 464 }
 465 EXPORT_SYMBOL(omap_readb);
 466
 467 u16 omap_readw(u32 pa)
 468 {
 469         return __raw_readw(OMAP2_L4_IO_ADDRESS(pa));
 470 }
 471 EXPORT_SYMBOL(omap_readw);
 472
 473 u32 omap_readl(u32 pa)
 474 {
 475         return __raw_readl(OMAP2_L4_IO_ADDRESS(pa));
 476 }
 477 EXPORT_SYMBOL(omap_readl);
 478
 479 void omap_writeb(u8 v, u32 pa)
 480 {
 481         __raw_writeb(v, OMAP2_L4_IO_ADDRESS(pa));
 482 }
 483 EXPORT_SYMBOL(omap_writeb);
 484
 485 void omap_writew(u16 v, u32 pa)
 486 {
 487         __raw_writew(v, OMAP2_L4_IO_ADDRESS(pa));
 488 }
 489 EXPORT_SYMBOL(omap_writew);
 490
 491 void omap_writel(u32 v, u32 pa)
 492 {
 493         __raw_writel(v, OMAP2_L4_IO_ADDRESS(pa));
 494 }
 495 EXPORT_SYMBOL(omap_writel);