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 "clock2xxx.h"
  39 #include "clock3xxx.h"
  40 #include "clock44xx.h"
  41
  42 #include <plat/omap-pm.h>
  43 #include <plat/powerdomain.h>
  44 #include "powerdomains.h"
  45
  46 #include <plat/clockdomain.h>
  47 #include "clockdomains.h"
  48 #include <plat/omap_hwmod.h>
  49
  50 /*
  51  * The machine specific code may provide the extra mapping besides the
  52  * default mapping provided here.
  53  */
  54
  55 #ifdef CONFIG_ARCH_OMAP2
  56 static struct map_desc omap24xx_io_desc[] __initdata = {
  57         {
  58                 .virtual        = L3_24XX_VIRT,
  59                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  60                 .length         = L3_24XX_SIZE,
  61                 .type           = MT_DEVICE
  62         },
  63         {
  64                 .virtual        = L4_24XX_VIRT,
  65                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  66                 .length         = L4_24XX_SIZE,
  67                 .type           = MT_DEVICE
  68         },
  69 };
  70
  71 #ifdef CONFIG_ARCH_OMAP2420
  72 static struct map_desc omap242x_io_desc[] __initdata = {
  73         {
  74                 .virtual        = DSP_MEM_2420_VIRT,
  75                 .pfn            = __phys_to_pfn(DSP_MEM_2420_PHYS),
  76                 .length         = DSP_MEM_2420_SIZE,
  77                 .type           = MT_DEVICE
  78         },
  79         {
  80                 .virtual        = DSP_IPI_2420_VIRT,
  81                 .pfn            = __phys_to_pfn(DSP_IPI_2420_PHYS),
  82                 .length         = DSP_IPI_2420_SIZE,
  83                 .type           = MT_DEVICE
  84         },
  85         {
  86                 .virtual        = DSP_MMU_2420_VIRT,
  87                 .pfn            = __phys_to_pfn(DSP_MMU_2420_PHYS),
  88                 .length         = DSP_MMU_2420_SIZE,
  89                 .type           = MT_DEVICE
  90         },
  91 };
  92
  93 #endif
  94
  95 #ifdef CONFIG_ARCH_OMAP2430
  96 static struct map_desc omap243x_io_desc[] __initdata = {
  97         {
  98                 .virtual        = L4_WK_243X_VIRT,
  99                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
 100                 .length         = L4_WK_243X_SIZE,
 101                 .type           = MT_DEVICE
 102         },
 103         {
 104                 .virtual        = OMAP243X_GPMC_VIRT,
 105                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 106                 .length         = OMAP243X_GPMC_SIZE,
 107                 .type           = MT_DEVICE
 108         },
 109         {
 110                 .virtual        = OMAP243X_SDRC_VIRT,
 111                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 112                 .length         = OMAP243X_SDRC_SIZE,
 113                 .type           = MT_DEVICE
 114         },
 115         {
 116                 .virtual        = OMAP243X_SMS_VIRT,
 117                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 118                 .length         = OMAP243X_SMS_SIZE,
 119                 .type           = MT_DEVICE
 120         },
 121 };
 122 #endif
 123 #endif
 124
 125 #ifdef  CONFIG_ARCH_OMAP3
 126 static struct map_desc omap34xx_io_desc[] __initdata = {
 127         {
 128                 .virtual        = L3_34XX_VIRT,
 129                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 130                 .length         = L3_34XX_SIZE,
 131                 .type           = MT_DEVICE
 132         },
 133         {
 134                 .virtual        = L4_34XX_VIRT,
 135                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 136                 .length         = L4_34XX_SIZE,
 137                 .type           = MT_DEVICE
 138         },
 139         {
 140                 .virtual        = OMAP34XX_GPMC_VIRT,
 141                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 142                 .length         = OMAP34XX_GPMC_SIZE,
 143                 .type           = MT_DEVICE
 144         },
 145         {
 146                 .virtual        = OMAP343X_SMS_VIRT,
 147                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 148                 .length         = OMAP343X_SMS_SIZE,
 149                 .type           = MT_DEVICE
 150         },
 151         {
 152                 .virtual        = OMAP343X_SDRC_VIRT,
 153                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 154                 .length         = OMAP343X_SDRC_SIZE,
 155                 .type           = MT_DEVICE
 156         },
 157         {
 158                 .virtual        = L4_PER_34XX_VIRT,
 159                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 160                 .length         = L4_PER_34XX_SIZE,
 161                 .type           = MT_DEVICE
 162         },
 163         {
 164                 .virtual        = L4_EMU_34XX_VIRT,
 165                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 166                 .length         = L4_EMU_34XX_SIZE,
 167                 .type           = MT_DEVICE
 168         },
 169 };
 170 #endif
 171 #ifdef  CONFIG_ARCH_OMAP4
 172 static struct map_desc omap44xx_io_desc[] __initdata = {
 173         {
 174                 .virtual        = L3_44XX_VIRT,
 175                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 176                 .length         = L3_44XX_SIZE,
 177                 .type           = MT_DEVICE,
 178         },
 179         {
 180                 .virtual        = L4_44XX_VIRT,
 181                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 182                 .length         = L4_44XX_SIZE,
 183                 .type           = MT_DEVICE,
 184         },
 185         {
 186                 .virtual        = OMAP44XX_GPMC_VIRT,
 187                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 188                 .length         = OMAP44XX_GPMC_SIZE,
 189                 .type           = MT_DEVICE,
 190         },
 191         {
 192                 .virtual        = OMAP44XX_EMIF1_VIRT,
 193                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
 194                 .length         = OMAP44XX_EMIF1_SIZE,
 195                 .type           = MT_DEVICE,
 196         },
 197         {
 198                 .virtual        = OMAP44XX_EMIF2_VIRT,
 199                 .pfn            = __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
 200                 .length         = OMAP44XX_EMIF2_SIZE,
 201                 .type           = MT_DEVICE,
 202         },
 203         {
 204                 .virtual        = OMAP44XX_DMM_VIRT,
 205                 .pfn            = __phys_to_pfn(OMAP44XX_DMM_PHYS),
 206                 .length         = OMAP44XX_DMM_SIZE,
 207                 .type           = MT_DEVICE,
 208         },
 209         {
 210                 .virtual        = L4_PER_44XX_VIRT,
 211                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 212                 .length         = L4_PER_44XX_SIZE,
 213                 .type           = MT_DEVICE,
 214         },
 215         {
 216                 .virtual        = L4_EMU_44XX_VIRT,
 217                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 218                 .length         = L4_EMU_44XX_SIZE,
 219                 .type           = MT_DEVICE,
 220         },
 221 };
 222 #endif
 223
 224 static void __init _omap2_map_common_io(void)
 225 {
 226         /* Normally devicemaps_init() would flush caches and tlb after
 227          * mdesc->map_io(), but we must also do it here because of the CPU
 228          * revision check below.
 229          */
 230         local_flush_tlb_all();
 231         flush_cache_all();
 232
 233         omap2_check_revision();
 234         omap_sram_init();
 235         omapfb_reserve_sdram();
 236         omap_vram_reserve_sdram();
 237 }
 238
 239 #ifdef CONFIG_ARCH_OMAP2420
 240 void __init omap242x_map_common_io()
 241 {
 242         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 243         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 244         _omap2_map_common_io();
 245 }
 246 #endif
 247
 248 #ifdef CONFIG_ARCH_OMAP2430
 249 void __init omap243x_map_common_io()
 250 {
 251         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 252         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 253         _omap2_map_common_io();
 254 }
 255 #endif
 256
 257 #ifdef CONFIG_ARCH_OMAP3
 258 void __init omap34xx_map_common_io()
 259 {
 260         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 261         _omap2_map_common_io();
 262 }
 263 #endif
 264
 265 #ifdef CONFIG_ARCH_OMAP4
 266 void __init omap44xx_map_common_io()
 267 {
 268         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 269         _omap2_map_common_io();
 270 }
 271 #endif
 272
 273 /*
 274  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 275  *
 276  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 277  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 278  * registers to the values currently defined by the kernel.  Currently
 279  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 280  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 281  * or passes along the return value of clk_set_rate().
 282  */
 283 static int __init _omap2_init_reprogram_sdrc(void)
 284 {
 285         struct clk *dpll3_m2_ck;
 286         int v = -EINVAL;
 287         long rate;
 288
 289         if (!cpu_is_omap34xx())
 290                 return 0;
 291
 292         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 293         if (!dpll3_m2_ck)
 294                 return -EINVAL;
 295
 296         rate = clk_get_rate(dpll3_m2_ck);
 297         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 298         v = clk_set_rate(dpll3_m2_ck, rate);
 299         if (v)
 300                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 301
 302         clk_put(dpll3_m2_ck);
 303
 304         return v;
 305 }
 306
 307 void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
 308                                  struct omap_sdrc_params *sdrc_cs1)
 309 {
 310         pwrdm_init(powerdomains_omap);
 311         clkdm_init(clockdomains_omap, clkdm_autodeps);
 312 #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
 313         if (cpu_is_omap242x())
 314                 omap2420_hwmod_init();
 315         else if (cpu_is_omap243x())
 316                 omap2430_hwmod_init();
 317         else if (cpu_is_omap34xx())
 318                 omap3xxx_hwmod_init();
 319         omap2_mux_init();
 320         /* The OPP tables have to be registered before a clk init */
 321         omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
 322 #endif
 323
 324         if (cpu_is_omap2420())
 325                 omap2420_clk_init();
 326         else if (cpu_is_omap2430())
 327                 omap2430_clk_init();
 328         else if (cpu_is_omap34xx())
 329                 omap3xxx_clk_init();
 330         else if (cpu_is_omap44xx())
 331                 omap4xxx_clk_init();
 332         else
 333                 pr_err("Could not init clock framework - unknown CPU\n");
 334
 335         omap_serial_early_init();
 336 #ifndef CONFIG_ARCH_OMAP4
 337         omap_hwmod_late_init();
 338         omap_pm_if_init();
 339         omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
 340         _omap2_init_reprogram_sdrc();
 341 #endif
 342         gpmc_init();
 343 }