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 <plat/powerdomain.h>
  43 #include "powerdomains.h"
  44
  45 #include <plat/clockdomain.h>
  46 #include "clockdomains.h"
  47
  48 #include <plat/omap_hwmod.h>
  49 #include <plat/multi.h>
  50
  51 /*
  52  * The machine specific code may provide the extra mapping besides the
  53  * default mapping provided here.
  54  */
  55
  56 #ifdef CONFIG_ARCH_OMAP2
  57 static struct map_desc omap24xx_io_desc[] __initdata = {
  58         {
  59                 .virtual        = L3_24XX_VIRT,
  60                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  61                 .length         = L3_24XX_SIZE,
  62                 .type           = MT_DEVICE
  63         },
  64         {
  65                 .virtual        = L4_24XX_VIRT,
  66                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  67                 .length         = L4_24XX_SIZE,
  68                 .type           = MT_DEVICE
  69         },
  70 };
  71
  72 #ifdef CONFIG_ARCH_OMAP2420
  73 static struct map_desc omap242x_io_desc[] __initdata = {
  74         {
  75                 .virtual        = DSP_MEM_2420_VIRT,
  76                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  77                 .length         = DSP_MEM_2420_SIZE,
  78                 .type           = MT_DEVICE
  79         },
  80         {
  81                 .virtual        = DSP_IPI_2420_VIRT,
  82                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  83                 .length         = DSP_IPI_2420_SIZE,
  84                 .type           = MT_DEVICE
  85         },
  86         {
  87                 .virtual        = DSP_MMU_2420_VIRT,
  88                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  89                 .length         = DSP_MMU_2420_SIZE,
  90                 .type           = MT_DEVICE
  91         },
  92 };
  93
  94 #endif
  95
  96 #ifdef CONFIG_ARCH_OMAP2430
  97 static struct map_desc omap243x_io_desc[] __initdata = {
  98         {
  99                 .virtual        = L4_WK_243X_VIRT,
 100                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
 101                 .length         = L4_WK_243X_SIZE,
 102                 .type           = MT_DEVICE
 103         },
 104         {
 105                 .virtual        = OMAP243X_GPMC_VIRT,
 106                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 107                 .length         = OMAP243X_GPMC_SIZE,
 108                 .type           = MT_DEVICE
 109         },
 110         {
 111                 .virtual        = OMAP243X_SDRC_VIRT,
 112                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 113                 .length         = OMAP243X_SDRC_SIZE,
 114                 .type           = MT_DEVICE
 115         },
 116         {
 117                 .virtual        = OMAP243X_SMS_VIRT,
 118                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 119                 .length         = OMAP243X_SMS_SIZE,
 120                 .type           = MT_DEVICE
 121         },
 122 };
 123 #endif
 124 #endif
 125
 126 #ifdef  CONFIG_ARCH_OMAP3
 127 static struct map_desc omap34xx_io_desc[] __initdata = {
 128         {
 129                 .virtual        = L3_34XX_VIRT,
 130                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 131                 .length         = L3_34XX_SIZE,
 132                 .type           = MT_DEVICE
 133         },
 134         {
 135                 .virtual        = L4_34XX_VIRT,
 136                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 137                 .length         = L4_34XX_SIZE,
 138                 .type           = MT_DEVICE
 139         },
 140         {
 141                 .virtual        = OMAP34XX_GPMC_VIRT,
 142                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 143                 .length         = OMAP34XX_GPMC_SIZE,
 144                 .type           = MT_DEVICE
 145         },
 146         {
 147                 .virtual        = OMAP343X_SMS_VIRT,
 148                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 149                 .length         = OMAP343X_SMS_SIZE,
 150                 .type           = MT_DEVICE
 151         },
 152         {
 153                 .virtual        = OMAP343X_SDRC_VIRT,
 154                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 155                 .length         = OMAP343X_SDRC_SIZE,
 156                 .type           = MT_DEVICE
 157         },
 158         {
 159                 .virtual        = L4_PER_34XX_VIRT,
 160                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 161                 .length         = L4_PER_34XX_SIZE,
 162                 .type           = MT_DEVICE
 163         },
 164         {
 165                 .virtual        = L4_EMU_34XX_VIRT,
 166                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 167                 .length         = L4_EMU_34XX_SIZE,
 168                 .type           = MT_DEVICE
 169         },
 170 #if defined(CONFIG_DEBUG_LL) &&                                                 \
 171         (defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
 172         {
 173                 .virtual        = ZOOM_UART_VIRT,
 174                 .pfn            = __phys_to_pfn(ZOOM_UART_BASE),
 175                 .length         = SZ_1M,
 176                 .type           = MT_DEVICE
 177         },
 178 #endif
 179 };
 180 #endif
 181 #ifdef  CONFIG_ARCH_OMAP4
 182 static struct map_desc omap44xx_io_desc[] __initdata = {
 183         {
 184                 .virtual        = L3_44XX_VIRT,
 185                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 186                 .length         = L3_44XX_SIZE,
 187                 .type           = MT_DEVICE,
 188         },
 189         {
 190                 .virtual        = L4_44XX_VIRT,
 191                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 192                 .length         = L4_44XX_SIZE,
 193                 .type           = MT_DEVICE,
 194         },
 195         {
 196                 .virtual        = OMAP44XX_GPMC_VIRT,
 197                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 198                 .length         = OMAP44XX_GPMC_SIZE,
 199                 .type           = MT_DEVICE,
 200         },
 201         {
 202                 .virtual        = OMAP44XX_EMIF1_VIRT,
 203                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 204                 .length         = OMAP44XX_EMIF1_SIZE,
 205                 .type           = MT_DEVICE,
 206         },
 207         {
 208                 .virtual        = OMAP44XX_EMIF2_VIRT,
 209                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 210                 .length         = OMAP44XX_EMIF2_SIZE,
 211                 .type           = MT_DEVICE,
 212         },
 213         {
 214                 .virtual        = OMAP44XX_DMM_VIRT,
 215                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 216                 .length         = OMAP44XX_DMM_SIZE,
 217                 .type           = MT_DEVICE,
 218         },
 219         {
 220                 .virtual        = L4_PER_44XX_VIRT,
 221                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 222                 .length         = L4_PER_44XX_SIZE,
 223                 .type           = MT_DEVICE,
 224         },
 225         {
 226                 .virtual        = L4_EMU_44XX_VIRT,
 227                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 228                 .length         = L4_EMU_44XX_SIZE,
 229                 .type           = MT_DEVICE,
 230         },
 231 };
 232 #endif
 233
 234 static void __init _omap2_map_common_io(void)
 235 {
 236         /* Normally devicemaps_init() would flush caches and tlb after
 237          * mdesc->map_io(), but we must also do it here because of the CPU
 238          * revision check below.
 239          */
 240         local_flush_tlb_all();
 241         flush_cache_all();
 242
 243         omap2_check_revision();
 244         omap_sram_init();
 245 }
 246
 247 #ifdef CONFIG_ARCH_OMAP2420
 248 void __init omap242x_map_common_io(void)
 249 {
 250         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 251         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 252         _omap2_map_common_io();
 253 }
 254 #endif
 255
 256 #ifdef CONFIG_ARCH_OMAP2430
 257 void __init omap243x_map_common_io(void)
 258 {
 259         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 260         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 261         _omap2_map_common_io();
 262 }
 263 #endif
 264
 265 #ifdef CONFIG_ARCH_OMAP3
 266 void __init omap34xx_map_common_io(void)
 267 {
 268         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 269         _omap2_map_common_io();
 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         _omap2_map_common_io();
 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 (!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 /*
 316  * Initialize asm_irq_base for entry-macro.S
 317  */
 318 static inline void omap_irq_base_init(void)
 319 {
 320         extern void __iomem *omap_irq_base;
 321
 322 #ifdef MULTI_OMAP2
 323         if (cpu_is_omap242x())
 324                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE);
 325         else if (cpu_is_omap34xx())
 326                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE);
 327         else if (cpu_is_omap44xx())
 328                 omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_GIC_CPU_BASE);
 329         else
 330                 pr_err("Could not initialize omap_irq_base\n");
 331 #endif
 332 }
 333
 334 void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
 335                                  struct omap_sdrc_params *sdrc_cs1)
 336 {
 337         u8 skip_setup_idle = 0;
 338
 339         pwrdm_init(powerdomains_omap);
 340         clkdm_init(clockdomains_omap, clkdm_autodeps);
 341         if (cpu_is_omap242x())
 342                 omap2420_hwmod_init();
 343         else if (cpu_is_omap243x())
 344                 omap2430_hwmod_init();
 345         else if (cpu_is_omap34xx())
 346                 omap3xxx_hwmod_init();
 347         else if (cpu_is_omap44xx())
 348                 omap44xx_hwmod_init();
 349
 350         /* The OPP tables have to be registered before a clk init */
 351         omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
 352
 353         if (cpu_is_omap2420())
 354                 omap2420_clk_init();
 355         else if (cpu_is_omap2430())
 356                 omap2430_clk_init();
 357         else if (cpu_is_omap34xx())
 358                 omap3xxx_clk_init();
 359         else if (cpu_is_omap44xx())
 360                 omap4xxx_clk_init();
 361         else
 362                 pr_err("Could not init clock framework - unknown CPU\n");
 363
 364         omap_serial_early_init();
 365
 366 #ifndef CONFIG_PM_RUNTIME
 367         skip_setup_idle = 1;
 368 #endif
 369         omap_hwmod_late_init(skip_setup_idle);
 370         if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
 371                 omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 372                 _omap2_init_reprogram_sdrc();
 373         }
 374         gpmc_init();
 375
 376         omap_irq_base_init();
 377 }