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/gpmc.h>
  34 #include <plat/serial.h>
  35
  36 #include "clock2xxx.h"
  37 #include "clock3xxx.h"
  38 #include "clock44xx.h"
  39 #include "io.h"
  40
  41 #include <plat/omap-pm.h>
  42 #include "powerdomain.h"
  43
  44 #include "clockdomain.h"
  45 #include <plat/omap_hwmod.h>
  46 #include <plat/multi.h>
  47
  48 /*
  49  * The machine specific code may provide the extra mapping besides the
  50  * default mapping provided here.
  51  */
  52
  53 #ifdef CONFIG_ARCH_OMAP2
  54 static struct map_desc omap24xx_io_desc[] __initdata = {
  55         {
  56                 .virtual        = L3_24XX_VIRT,
  57                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  58                 .length         = L3_24XX_SIZE,
  59                 .type           = MT_DEVICE
  60         },
  61         {
  62                 .virtual        = L4_24XX_VIRT,
  63                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  64                 .length         = L4_24XX_SIZE,
  65                 .type           = MT_DEVICE
  66         },
  67 };
  68
  69 #ifdef CONFIG_ARCH_OMAP2420
  70 static struct map_desc omap242x_io_desc[] __initdata = {
  71         {
  72                 .virtual        = DSP_MEM_2420_VIRT,
  73                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  74                 .length         = DSP_MEM_2420_SIZE,
  75                 .type           = MT_DEVICE
  76         },
  77         {
  78                 .virtual        = DSP_IPI_2420_VIRT,
  79                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  80                 .length         = DSP_IPI_2420_SIZE,
  81                 .type           = MT_DEVICE
  82         },
  83         {
  84                 .virtual        = DSP_MMU_2420_VIRT,
  85                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  86                 .length         = DSP_MMU_2420_SIZE,
  87                 .type           = MT_DEVICE
  88         },
  89 };
  90
  91 #endif
  92
  93 #ifdef CONFIG_ARCH_OMAP2430
  94 static struct map_desc omap243x_io_desc[] __initdata = {
  95         {
  96                 .virtual        = L4_WK_243X_VIRT,
  97                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
  98                 .length         = L4_WK_243X_SIZE,
  99                 .type           = MT_DEVICE
 100         },
 101         {
 102                 .virtual        = OMAP243X_GPMC_VIRT,
 103                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 104                 .length         = OMAP243X_GPMC_SIZE,
 105                 .type           = MT_DEVICE
 106         },
 107         {
 108                 .virtual        = OMAP243X_SDRC_VIRT,
 109                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 110                 .length         = OMAP243X_SDRC_SIZE,
 111                 .type           = MT_DEVICE
 112         },
 113         {
 114                 .virtual        = OMAP243X_SMS_VIRT,
 115                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 116                 .length         = OMAP243X_SMS_SIZE,
 117                 .type           = MT_DEVICE
 118         },
 119 };
 120 #endif
 121 #endif
 122
 123 #ifdef  CONFIG_ARCH_OMAP3
 124 static struct map_desc omap34xx_io_desc[] __initdata = {
 125         {
 126                 .virtual        = L3_34XX_VIRT,
 127                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 128                 .length         = L3_34XX_SIZE,
 129                 .type           = MT_DEVICE
 130         },
 131         {
 132                 .virtual        = L4_34XX_VIRT,
 133                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 134                 .length         = L4_34XX_SIZE,
 135                 .type           = MT_DEVICE
 136         },
 137         {
 138                 .virtual        = OMAP34XX_GPMC_VIRT,
 139                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 140                 .length         = OMAP34XX_GPMC_SIZE,
 141                 .type           = MT_DEVICE
 142         },
 143         {
 144                 .virtual        = OMAP343X_SMS_VIRT,
 145                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 146                 .length         = OMAP343X_SMS_SIZE,
 147                 .type           = MT_DEVICE
 148         },
 149         {
 150                 .virtual        = OMAP343X_SDRC_VIRT,
 151                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 152                 .length         = OMAP343X_SDRC_SIZE,
 153                 .type           = MT_DEVICE
 154         },
 155         {
 156                 .virtual        = L4_PER_34XX_VIRT,
 157                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 158                 .length         = L4_PER_34XX_SIZE,
 159                 .type           = MT_DEVICE
 160         },
 161         {
 162                 .virtual        = L4_EMU_34XX_VIRT,
 163                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 164                 .length         = L4_EMU_34XX_SIZE,
 165                 .type           = MT_DEVICE
 166         },
 167 #if defined(CONFIG_DEBUG_LL) &&                                                 \
 168         (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
 169         {
 170                 .virtual        = ZOOM_UART_VIRT,
 171                 .pfn            = __phys_to_pfn(ZOOM_UART_BASE),
 172                 .length         = SZ_1M,
 173                 .type           = MT_DEVICE
 174         },
 175 #endif
 176 };
 177 #endif
 178 #ifdef  CONFIG_ARCH_OMAP4
 179 static struct map_desc omap44xx_io_desc[] __initdata = {
 180         {
 181                 .virtual        = L3_44XX_VIRT,
 182                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 183                 .length         = L3_44XX_SIZE,
 184                 .type           = MT_DEVICE,
 185         },
 186         {
 187                 .virtual        = L4_44XX_VIRT,
 188                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 189                 .length         = L4_44XX_SIZE,
 190                 .type           = MT_DEVICE,
 191         },
 192         {
 193                 .virtual        = OMAP44XX_GPMC_VIRT,
 194                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 195                 .length         = OMAP44XX_GPMC_SIZE,
 196                 .type           = MT_DEVICE,
 197         },
 198         {
 199                 .virtual        = OMAP44XX_EMIF1_VIRT,
 200                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 201                 .length         = OMAP44XX_EMIF1_SIZE,
 202                 .type           = MT_DEVICE,
 203         },
 204         {
 205                 .virtual        = OMAP44XX_EMIF2_VIRT,
 206                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 207                 .length         = OMAP44XX_EMIF2_SIZE,
 208                 .type           = MT_DEVICE,
 209         },
 210         {
 211                 .virtual        = OMAP44XX_DMM_VIRT,
 212                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 213                 .length         = OMAP44XX_DMM_SIZE,
 214                 .type           = MT_DEVICE,
 215         },
 216         {
 217                 .virtual        = L4_PER_44XX_VIRT,
 218                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 219                 .length         = L4_PER_44XX_SIZE,
 220                 .type           = MT_DEVICE,
 221         },
 222         {
 223                 .virtual        = L4_EMU_44XX_VIRT,
 224                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 225                 .length         = L4_EMU_44XX_SIZE,
 226                 .type           = MT_DEVICE,
 227         },
 228 };
 229 #endif
 230
 231 static void __init _omap2_map_common_io(void)
 232 {
 233         /* Normally devicemaps_init() would flush caches and tlb after
 234          * mdesc->map_io(), but we must also do it here because of the CPU
 235          * revision check below.
 236          */
 237         local_flush_tlb_all();
 238         flush_cache_all();
 239
 240         omap2_check_revision();
 241         omap_sram_init();
 242 }
 243
 244 #ifdef CONFIG_ARCH_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         _omap2_map_common_io();
 250 }
 251 #endif
 252
 253 #ifdef CONFIG_ARCH_OMAP2430
 254 void __init omap243x_map_common_io(void)
 255 {
 256         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 257         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 258         _omap2_map_common_io();
 259 }
 260 #endif
 261
 262 #ifdef CONFIG_ARCH_OMAP3
 263 void __init omap34xx_map_common_io(void)
 264 {
 265         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 266         _omap2_map_common_io();
 267 }
 268 #endif
 269
 270 #ifdef CONFIG_ARCH_OMAP4
 271 void __init omap44xx_map_common_io(void)
 272 {
 273         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 274         _omap2_map_common_io();
 275 }
 276 #endif
 277
 278 /*
 279  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 280  *
 281  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 282  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 283  * registers to the values currently defined by the kernel.  Currently
 284  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 285  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 286  * or passes along the return value of clk_set_rate().
 287  */
 288 static int __init _omap2_init_reprogram_sdrc(void)
 289 {
 290         struct clk *dpll3_m2_ck;
 291         int v = -EINVAL;
 292         long rate;
 293
 294         if (!cpu_is_omap34xx())
 295                 return 0;
 296
 297         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 298         if (IS_ERR(dpll3_m2_ck))
 299                 return -EINVAL;
 300
 301         rate = clk_get_rate(dpll3_m2_ck);
 302         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 303         v = clk_set_rate(dpll3_m2_ck, rate);
 304         if (v)
 305                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 306
 307         clk_put(dpll3_m2_ck);
 308
 309         return v;
 310 }
 311
 312 static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
 313 {
 314         return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
 315 }
 316
 317 /*
 318  * Initialize asm_irq_base for entry-macro.S
 319  */
 320 static inline void omap_irq_base_init(void)
 321 {
 322         extern void __iomem *omap_irq_base;
 323
 324 #ifdef MULTI_OMAP2
 325         if (cpu_is_omap24xx())
 326                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE);
 327         else if (cpu_is_omap34xx())
 328                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE);
 329         else if (cpu_is_omap44xx())
 330                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_GIC_CPU_BASE);
 331         else
 332                 pr_err("Could not initialize omap_irq_base\n");
 333 #endif
 334 }
 335
 336 void __init omap2_init_common_infrastructure(void)
 337 {
 338         u8 postsetup_state;
 339
 340         if (cpu_is_omap242x()) {
 341                 omap2xxx_powerdomains_init();
 342                 omap2_clockdomains_init();
 343                 omap2420_hwmod_init();
 344         } else if (cpu_is_omap243x()) {
 345                 omap2xxx_powerdomains_init();
 346                 omap2_clockdomains_init();
 347                 omap2430_hwmod_init();
 348         } else if (cpu_is_omap34xx()) {
 349                 omap3xxx_powerdomains_init();
 350                 omap2_clockdomains_init();
 351                 omap3xxx_hwmod_init();
 352         } else if (cpu_is_omap44xx()) {
 353                 omap44xx_powerdomains_init();
 354                 omap44xx_clockdomains_init();
 355                 omap44xx_hwmod_init();
 356         } else {
 357                 pr_err("Could not init hwmod data - unknown SoC\n");
 358         }
 359
 360         /* Set the default postsetup state for all hwmods */
 361 #ifdef CONFIG_PM_RUNTIME
 362         postsetup_state = _HWMOD_STATE_IDLE;
 363 #else
 364         postsetup_state = _HWMOD_STATE_ENABLED;
 365 #endif
 366         omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);
 367
 368         /*
 369          * Set the default postsetup state for unusual modules (like
 370          * MPU WDT).
 371          *
 372          * The postsetup_state is not actually used until
 373          * omap_hwmod_late_init(), so boards that desire full watchdog
 374          * coverage of kernel initialization can reprogram the
 375          * postsetup_state between the calls to
 376          * omap2_init_common_infra() and omap2_init_common_devices().
 377          *
 378          * XXX ideally we could detect whether the MPU WDT was currently
 379          * enabled here and make this conditional
 380          */
 381         postsetup_state = _HWMOD_STATE_DISABLED;
 382         omap_hwmod_for_each_by_class("wd_timer",
 383                                      _set_hwmod_postsetup_state,
 384                                      &postsetup_state);
 385
 386         omap_pm_if_early_init();
 387
 388         if (cpu_is_omap2420())
 389                 omap2420_clk_init();
 390         else if (cpu_is_omap2430())
 391                 omap2430_clk_init();
 392         else if (cpu_is_omap34xx())
 393                 omap3xxx_clk_init();
 394         else if (cpu_is_omap44xx())
 395                 omap4xxx_clk_init();
 396         else
 397                 pr_err("Could not init clock framework - unknown SoC\n");
 398 }
 399
 400 void __init omap2_init_common_devices(struct omap_sdrc_params *sdrc_cs0,
 401                                       struct omap_sdrc_params *sdrc_cs1)
 402 {
 403         omap_serial_early_init();
 404
 405         omap_hwmod_late_init();
 406
 407         if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
 408                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 409                 _omap2_init_reprogram_sdrc();
 410         }
 411         gpmc_init();
 412
 413         omap_irq_base_init();
 414 }
 415
 416 /*
 417  * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 418  */
 419
 420 u8 omap_readb(u32 pa)
 421 {
 422         return __raw_readb(OMAP2_L4_IO_ADDRESS(pa));
 423 }
 424 EXPORT_SYMBOL(omap_readb);
 425
 426 u16 omap_readw(u32 pa)
 427 {
 428         return __raw_readw(OMAP2_L4_IO_ADDRESS(pa));
 429 }
 430 EXPORT_SYMBOL(omap_readw);
 431
 432 u32 omap_readl(u32 pa)
 433 {
 434         return __raw_readl(OMAP2_L4_IO_ADDRESS(pa));
 435 }
 436 EXPORT_SYMBOL(omap_readl);
 437
 438 void omap_writeb(u8 v, u32 pa)
 439 {
 440         __raw_writeb(v, OMAP2_L4_IO_ADDRESS(pa));
 441 }
 442 EXPORT_SYMBOL(omap_writeb);
 443
 444 void omap_writew(u16 v, u32 pa)
 445 {
 446         __raw_writew(v, OMAP2_L4_IO_ADDRESS(pa));
 447 }
 448 EXPORT_SYMBOL(omap_writew);
 449
 450 void omap_writel(u32 v, u32 pa)
 451 {
 452         __raw_writel(v, OMAP2_L4_IO_ADDRESS(pa));
 453 }
 454 EXPORT_SYMBOL(omap_writel);