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/mux.h>
  32 #include <plat/sram.h>
  33 #include <plat/sdrc.h>
  34 #include <plat/gpmc.h>
  35 #include <plat/serial.h>
  36 #include <plat/vram.h>
  37
  38 #include "clock.h"
  39
  40 #include <plat/omap-pm.h>
  41 #include <plat/powerdomain.h>
  42 #include "powerdomains.h"
  43
  44 #include <plat/clockdomain.h>
  45 #include "clockdomains.h"
  46 #include <plat/omap_hwmod.h>
  47 #include "omap_hwmod_2420.h"
  48 #include "omap_hwmod_2430.h"
  49 #include "omap_hwmod_34xx.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_OMAP24XX
  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_OMAP34XX
 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        = L4_WK_34XX_VIRT,
 142                 .pfn            = __phys_to_pfn(L4_WK_34XX_PHYS),
 143                 .length         = L4_WK_34XX_SIZE,
 144                 .type           = MT_DEVICE
 145         },
 146         {
 147                 .virtual        = OMAP34XX_GPMC_VIRT,
 148                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 149                 .length         = OMAP34XX_GPMC_SIZE,
 150                 .type           = MT_DEVICE
 151         },
 152         {
 153                 .virtual        = OMAP343X_SMS_VIRT,
 154                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 155                 .length         = OMAP343X_SMS_SIZE,
 156                 .type           = MT_DEVICE
 157         },
 158         {
 159                 .virtual        = OMAP343X_SDRC_VIRT,
 160                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 161                 .length         = OMAP343X_SDRC_SIZE,
 162                 .type           = MT_DEVICE
 163         },
 164         {
 165                 .virtual        = L4_PER_34XX_VIRT,
 166                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 167                 .length         = L4_PER_34XX_SIZE,
 168                 .type           = MT_DEVICE
 169         },
 170         {
 171                 .virtual        = L4_EMU_34XX_VIRT,
 172                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 173                 .length         = L4_EMU_34XX_SIZE,
 174                 .type           = MT_DEVICE
 175         },
 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        = L4_WK_44XX_VIRT,
 194                 .pfn            = __phys_to_pfn(L4_WK_44XX_PHYS),
 195                 .length         = L4_WK_44XX_SIZE,
 196                 .type           = MT_DEVICE,
 197         },
 198         {
 199                 .virtual        = OMAP44XX_GPMC_VIRT,
 200                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 201                 .length         = OMAP44XX_GPMC_SIZE,
 202                 .type           = MT_DEVICE,
 203         },
 204         {
 205                 .virtual        = OMAP44XX_EMIF1_VIRT,
 206                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 207                 .length         = OMAP44XX_EMIF1_SIZE,
 208                 .type           = MT_DEVICE,
 209         },
 210         {
 211                 .virtual        = OMAP44XX_EMIF2_VIRT,
 212                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 213                 .length         = OMAP44XX_EMIF2_SIZE,
 214                 .type           = MT_DEVICE,
 215         },
 216         {
 217                 .virtual        = OMAP44XX_DMM_VIRT,
 218                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 219                 .length         = OMAP44XX_DMM_SIZE,
 220                 .type           = MT_DEVICE,
 221         },
 222         {
 223                 .virtual        = L4_PER_44XX_VIRT,
 224                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 225                 .length         = L4_PER_44XX_SIZE,
 226                 .type           = MT_DEVICE,
 227         },
 228         {
 229                 .virtual        = L4_EMU_44XX_VIRT,
 230                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 231                 .length         = L4_EMU_44XX_SIZE,
 232                 .type           = MT_DEVICE,
 233         },
 234 };
 235 #endif
 236
 237 void __init omap2_map_common_io(void)
 238 {
 239 #if defined(CONFIG_ARCH_OMAP2420)
 240         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 241         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 242 #endif
 243
 244 #if defined(CONFIG_ARCH_OMAP2430)
 245         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 246         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 247 #endif
 248
 249 #if defined(CONFIG_ARCH_OMAP34XX)
 250         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 251 #endif
 252
 253 #if defined(CONFIG_ARCH_OMAP4)
 254         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 255 #endif
 256         /* Normally devicemaps_init() would flush caches and tlb after
 257          * mdesc->map_io(), but we must also do it here because of the CPU
 258          * revision check below.
 259          */
 260         local_flush_tlb_all();
 261         flush_cache_all();
 262
 263         omap2_check_revision();
 264         omap_sram_init();
 265         omapfb_reserve_sdram();
 266         omap_vram_reserve_sdram();
 267 }
 268
 269 /*
 270  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 271  *
 272  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 273  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 274  * registers to the values currently defined by the kernel.  Currently
 275  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 276  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 277  * or passes along the return value of clk_set_rate().
 278  */
 279 static int __init _omap2_init_reprogram_sdrc(void)
 280 {
 281         struct clk *dpll3_m2_ck;
 282         int v = -EINVAL;
 283         long rate;
 284
 285         if (!cpu_is_omap34xx())
 286                 return 0;
 287
 288         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 289         if (!dpll3_m2_ck)
 290                 return -EINVAL;
 291
 292         rate = clk_get_rate(dpll3_m2_ck);
 293         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 294         v = clk_set_rate(dpll3_m2_ck, rate);
 295         if (v)
 296                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 297
 298         clk_put(dpll3_m2_ck);
 299
 300         return v;
 301 }
 302
 303 void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
 304                                  struct omap_sdrc_params *sdrc_cs1)
 305 {
 306         struct omap_hwmod **hwmods = NULL;
 307
 308         if (cpu_is_omap2420())
 309                 hwmods = omap2420_hwmods;
 310         else if (cpu_is_omap2430())
 311                 hwmods = omap2430_hwmods;
 312         else if (cpu_is_omap34xx())
 313                 hwmods = omap34xx_hwmods;
 314
 315 #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
 316         /* The OPP tables have to be registered before a clk init */
 317         omap_hwmod_init(hwmods);
 318         omap2_mux_init();
 319         omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
 320         pwrdm_init(powerdomains_omap);
 321         clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
 322 #endif
 323         omap2_clk_init();
 324         omap_serial_early_init();
 325 #ifndef CONFIG_ARCH_OMAP4
 326         omap_hwmod_late_init();
 327         omap_pm_if_init();
 328         omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 329         _omap2_init_reprogram_sdrc();
 330 #endif
 331         gpmc_init();
 332 }