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 #include "io.h"
  39
  40 #include <plat/omap-pm.h>
  41 #include "powerdomain.h"
  42
  43 #include "clockdomain.h"
  44 #include <plat/omap_hwmod.h>
  45 #include <plat/multi.h>
  46
  47 /*
  48  * The machine specific code may provide the extra mapping besides the
  49  * default mapping provided here.
  50  */
  51
  52 #ifdef CONFIG_ARCH_OMAP2
  53 static struct map_desc omap24xx_io_desc[] __initdata = {
  54         {
  55                 .virtual        = L3_24XX_VIRT,
  56                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  57                 .length         = L3_24XX_SIZE,
  58                 .type           = MT_DEVICE
  59         },
  60         {
  61                 .virtual        = L4_24XX_VIRT,
  62                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  63                 .length         = L4_24XX_SIZE,
  64                 .type           = MT_DEVICE
  65         },
  66 };
  67
  68 #ifdef CONFIG_SOC_OMAP2420
  69 static struct map_desc omap242x_io_desc[] __initdata = {
  70         {
  71                 .virtual        = DSP_MEM_2420_VIRT,
  72                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  73                 .length         = DSP_MEM_2420_SIZE,
  74                 .type           = MT_DEVICE
  75         },
  76         {
  77                 .virtual        = DSP_IPI_2420_VIRT,
  78                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  79                 .length         = DSP_IPI_2420_SIZE,
  80                 .type           = MT_DEVICE
  81         },
  82         {
  83                 .virtual        = DSP_MMU_2420_VIRT,
  84                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  85                 .length         = DSP_MMU_2420_SIZE,
  86                 .type           = MT_DEVICE
  87         },
  88 };
  89
  90 #endif
  91
  92 #ifdef CONFIG_SOC_OMAP2430
  93 static struct map_desc omap243x_io_desc[] __initdata = {
  94         {
  95                 .virtual        = L4_WK_243X_VIRT,
  96                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
  97                 .length         = L4_WK_243X_SIZE,
  98                 .type           = MT_DEVICE
  99         },
 100         {
 101                 .virtual        = OMAP243X_GPMC_VIRT,
 102                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 103                 .length         = OMAP243X_GPMC_SIZE,
 104                 .type           = MT_DEVICE
 105         },
 106         {
 107                 .virtual        = OMAP243X_SDRC_VIRT,
 108                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 109                 .length         = OMAP243X_SDRC_SIZE,
 110                 .type           = MT_DEVICE
 111         },
 112         {
 113                 .virtual        = OMAP243X_SMS_VIRT,
 114                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 115                 .length         = OMAP243X_SMS_SIZE,
 116                 .type           = MT_DEVICE
 117         },
 118 };
 119 #endif
 120 #endif
 121
 122 #ifdef  CONFIG_ARCH_OMAP3
 123 static struct map_desc omap34xx_io_desc[] __initdata = {
 124         {
 125                 .virtual        = L3_34XX_VIRT,
 126                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 127                 .length         = L3_34XX_SIZE,
 128                 .type           = MT_DEVICE
 129         },
 130         {
 131                 .virtual        = L4_34XX_VIRT,
 132                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 133                 .length         = L4_34XX_SIZE,
 134                 .type           = MT_DEVICE
 135         },
 136         {
 137                 .virtual        = OMAP34XX_GPMC_VIRT,
 138                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 139                 .length         = OMAP34XX_GPMC_SIZE,
 140                 .type           = MT_DEVICE
 141         },
 142         {
 143                 .virtual        = OMAP343X_SMS_VIRT,
 144                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 145                 .length         = OMAP343X_SMS_SIZE,
 146                 .type           = MT_DEVICE
 147         },
 148         {
 149                 .virtual        = OMAP343X_SDRC_VIRT,
 150                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 151                 .length         = OMAP343X_SDRC_SIZE,
 152                 .type           = MT_DEVICE
 153         },
 154         {
 155                 .virtual        = L4_PER_34XX_VIRT,
 156                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 157                 .length         = L4_PER_34XX_SIZE,
 158                 .type           = MT_DEVICE
 159         },
 160         {
 161                 .virtual        = L4_EMU_34XX_VIRT,
 162                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 163                 .length         = L4_EMU_34XX_SIZE,
 164                 .type           = MT_DEVICE
 165         },
 166 #if defined(CONFIG_DEBUG_LL) &&                                                 \
 167         (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
 168         {
 169                 .virtual        = ZOOM_UART_VIRT,
 170                 .pfn            = __phys_to_pfn(ZOOM_UART_BASE),
 171                 .length         = SZ_1M,
 172                 .type           = MT_DEVICE
 173         },
 174 #endif
 175 };
 176 #endif
 177
 178 #ifdef CONFIG_SOC_OMAPTI816X
 179 static struct map_desc omapti816x_io_desc[] __initdata = {
 180         {
 181                 .virtual        = L4_34XX_VIRT,
 182                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 183                 .length         = L4_34XX_SIZE,
 184                 .type           = MT_DEVICE
 185         },
 186 };
 187 #endif
 188
 189 #ifdef  CONFIG_ARCH_OMAP4
 190 static struct map_desc omap44xx_io_desc[] __initdata = {
 191         {
 192                 .virtual        = L3_44XX_VIRT,
 193                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 194                 .length         = L3_44XX_SIZE,
 195                 .type           = MT_DEVICE,
 196         },
 197         {
 198                 .virtual        = L4_44XX_VIRT,
 199                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 200                 .length         = L4_44XX_SIZE,
 201                 .type           = MT_DEVICE,
 202         },
 203         {
 204                 .virtual        = OMAP44XX_GPMC_VIRT,
 205                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 206                 .length         = OMAP44XX_GPMC_SIZE,
 207                 .type           = MT_DEVICE,
 208         },
 209         {
 210                 .virtual        = OMAP44XX_EMIF1_VIRT,
 211                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 212                 .length         = OMAP44XX_EMIF1_SIZE,
 213                 .type           = MT_DEVICE,
 214         },
 215         {
 216                 .virtual        = OMAP44XX_EMIF2_VIRT,
 217                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 218                 .length         = OMAP44XX_EMIF2_SIZE,
 219                 .type           = MT_DEVICE,
 220         },
 221         {
 222                 .virtual        = OMAP44XX_DMM_VIRT,
 223                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 224                 .length         = OMAP44XX_DMM_SIZE,
 225                 .type           = MT_DEVICE,
 226         },
 227         {
 228                 .virtual        = L4_PER_44XX_VIRT,
 229                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 230                 .length         = L4_PER_44XX_SIZE,
 231                 .type           = MT_DEVICE,
 232         },
 233         {
 234                 .virtual        = L4_EMU_44XX_VIRT,
 235                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 236                 .length         = L4_EMU_44XX_SIZE,
 237                 .type           = MT_DEVICE,
 238         },
 239 };
 240 #endif
 241
 242 static void __init _omap2_map_common_io(void)
 243 {
 244         /* Normally devicemaps_init() would flush caches and tlb after
 245          * mdesc->map_io(), but we must also do it here because of the CPU
 246          * revision check below.
 247          */
 248         local_flush_tlb_all();
 249         flush_cache_all();
 250
 251         omap2_check_revision();
 252         omap_sram_init();
 253 }
 254
 255 #ifdef CONFIG_SOC_OMAP2420
 256 void __init omap242x_map_common_io(void)
 257 {
 258         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 259         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 260         _omap2_map_common_io();
 261 }
 262 #endif
 263
 264 #ifdef CONFIG_SOC_OMAP2430
 265 void __init omap243x_map_common_io(void)
 266 {
 267         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 268         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 269         _omap2_map_common_io();
 270 }
 271 #endif
 272
 273 #ifdef CONFIG_ARCH_OMAP3
 274 void __init omap34xx_map_common_io(void)
 275 {
 276         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 277         _omap2_map_common_io();
 278 }
 279 #endif
 280
 281 #ifdef CONFIG_SOC_OMAPTI816X
 282 void __init omapti816x_map_common_io(void)
 283 {
 284         iotable_init(omapti816x_io_desc, ARRAY_SIZE(omapti816x_io_desc));
 285         _omap2_map_common_io();
 286 }
 287 #endif
 288
 289 #ifdef CONFIG_ARCH_OMAP4
 290 void __init omap44xx_map_common_io(void)
 291 {
 292         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 293         _omap2_map_common_io();
 294 }
 295 #endif
 296
 297 /*
 298  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 299  *
 300  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 301  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 302  * registers to the values currently defined by the kernel.  Currently
 303  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 304  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 305  * or passes along the return value of clk_set_rate().
 306  */
 307 static int __init _omap2_init_reprogram_sdrc(void)
 308 {
 309         struct clk *dpll3_m2_ck;
 310         int v = -EINVAL;
 311         long rate;
 312
 313         if (!cpu_is_omap34xx())
 314                 return 0;
 315
 316         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 317         if (IS_ERR(dpll3_m2_ck))
 318                 return -EINVAL;
 319
 320         rate = clk_get_rate(dpll3_m2_ck);
 321         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 322         v = clk_set_rate(dpll3_m2_ck, rate);
 323         if (v)
 324                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 325
 326         clk_put(dpll3_m2_ck);
 327
 328         return v;
 329 }
 330
 331 static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
 332 {
 333         return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
 334 }
 335
 336 void __iomem *omap_irq_base;
 337
 338 /*
 339  * Initialize asm_irq_base for entry-macro.S
 340  */
 341 static inline void omap_irq_base_init(void)
 342 {
 343         if (cpu_is_omap24xx())
 344                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE);
 345         else if (cpu_is_omap34xx())
 346                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE);
 347         else if (cpu_is_omap44xx())
 348                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_GIC_CPU_BASE);
 349         else
 350                 pr_err("Could not initialize omap_irq_base\n");
 351 }
 352
 353 void __init omap2_init_common_infrastructure(void)
 354 {
 355         u8 postsetup_state;
 356
 357         if (cpu_is_omap242x()) {
 358                 omap2xxx_powerdomains_init();
 359                 omap2xxx_clockdomains_init();
 360                 omap2420_hwmod_init();
 361         } else if (cpu_is_omap243x()) {
 362                 omap2xxx_powerdomains_init();
 363                 omap2xxx_clockdomains_init();
 364                 omap2430_hwmod_init();
 365         } else if (cpu_is_omap34xx()) {
 366                 omap3xxx_powerdomains_init();
 367                 omap3xxx_clockdomains_init();
 368                 omap3xxx_hwmod_init();
 369         } else if (cpu_is_omap44xx()) {
 370                 omap44xx_powerdomains_init();
 371                 omap44xx_clockdomains_init();
 372                 omap44xx_hwmod_init();
 373         } else {
 374                 pr_err("Could not init hwmod data - unknown SoC\n");
 375         }
 376
 377         /* Set the default postsetup state for all hwmods */
 378 #ifdef CONFIG_PM_RUNTIME
 379         postsetup_state = _HWMOD_STATE_IDLE;
 380 #else
 381         postsetup_state = _HWMOD_STATE_ENABLED;
 382 #endif
 383         omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 384
 385         /*
 386          * Set the default postsetup state for unusual modules (like
 387          * MPU WDT).
 388          *
 389          * The postsetup_state is not actually used until
 390          * omap_hwmod_late_init(), so boards that desire full watchdog
 391          * coverage of kernel initialization can reprogram the
 392          * postsetup_state between the calls to
 393          * omap2_init_common_infra() and omap2_init_common_devices().
 394          *
 395          * XXX ideally we could detect whether the MPU WDT was currently
 396          * enabled here and make this conditional
 397          */
 398         postsetup_state = _HWMOD_STATE_DISABLED;
 399         omap_hwmod_for_each_by_class("wd_timer",
 400                                      _set_hwmod_postsetup_state,
 401                                      &postsetup_state);
 402
 403         omap_pm_if_early_init();
 404
 405         if (cpu_is_omap2420())
 406                 omap2420_clk_init();
 407         else if (cpu_is_omap2430())
 408                 omap2430_clk_init();
 409         else if (cpu_is_omap34xx())
 410                 omap3xxx_clk_init();
 411         else if (cpu_is_omap44xx())
 412                 omap4xxx_clk_init();
 413         else
 414                 pr_err("Could not init clock framework - unknown SoC\n");
 415 }
 416
 417 void __init omap2_init_common_devices(struct omap_sdrc_params *sdrc_cs0,
 418                                       struct omap_sdrc_params *sdrc_cs1)
 419 {
 420         if (cpu_is_omap24xx() || omap3_has_sdrc()) {
 421                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 422                 _omap2_init_reprogram_sdrc();
 423         }
 424
 425         omap_irq_base_init();
 426 }
 427
 428 /*
 429  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 430  */
 431
 432 u8 omap_readb(u32 pa)
 433 {
 434         return __raw_readb(OMAP2_L4_IO_ADDRESS(pa));
 435 }
 436 EXPORT_SYMBOL(omap_readb);
 437
 438 u16 omap_readw(u32 pa)
 439 {
 440         return __raw_readw(OMAP2_L4_IO_ADDRESS(pa));
 441 }
 442 EXPORT_SYMBOL(omap_readw);
 443
 444 u32 omap_readl(u32 pa)
 445 {
 446         return __raw_readl(OMAP2_L4_IO_ADDRESS(pa));
 447 }
 448 EXPORT_SYMBOL(omap_readl);
 449
 450 void omap_writeb(u8 v, u32 pa)
 451 {
 452         __raw_writeb(v, OMAP2_L4_IO_ADDRESS(pa));
 453 }
 454 EXPORT_SYMBOL(omap_writeb);
 455
 456 void omap_writew(u16 v, u32 pa)
 457 {
 458         __raw_writew(v, OMAP2_L4_IO_ADDRESS(pa));
 459 }
 460 EXPORT_SYMBOL(omap_writew);
 461
 462 void omap_writel(u32 v, u32 pa)
 463 {
 464         __raw_writel(v, OMAP2_L4_IO_ADDRESS(pa));
 465 }
 466 EXPORT_SYMBOL(omap_writel);