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
  26 #include <asm/tlb.h>
  27
  28 #include <asm/mach/map.h>
  29
  30 #include <mach/mux.h>
  31 #include <mach/omapfb.h>
  32 #include <mach/sram.h>
  33 #include <mach/sdrc.h>
  34 #include <mach/gpmc.h>
  35
  36 #ifndef CONFIG_ARCH_OMAP4       /* FIXME: Remove this once clkdev is ready */
  37 #include "clock.h"
  38
  39 #include <mach/powerdomain.h>
  40
  41 #include "powerdomains.h"
  42
  43 #include <mach/clockdomain.h>
  44 #include "clockdomains.h"
  45 #endif
  46 /*
  47  * The machine specific code may provide the extra mapping besides the
  48  * default mapping provided here.
  49  */
  50
  51 #ifdef CONFIG_ARCH_OMAP24XX
  52 static struct map_desc omap24xx_io_desc[] __initdata = {
  53         {
  54                 .virtual        = L3_24XX_VIRT,
  55                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  56                 .length         = L3_24XX_SIZE,
  57                 .type           = MT_DEVICE
  58         },
  59         {
  60                 .virtual        = L4_24XX_VIRT,
  61                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
  62                 .length         = L4_24XX_SIZE,
  63                 .type           = MT_DEVICE
  64         },
  65 };
  66
  67 #ifdef CONFIG_ARCH_OMAP2420
  68 static struct map_desc omap242x_io_desc[] __initdata = {
  69         {
  70                 .virtual        = DSP_MEM_24XX_VIRT,
  71                 .pfn            = __phys_to_pfn(DSP_MEM_24XX_PHYS),
  72                 .length         = DSP_MEM_24XX_SIZE,
  73                 .type           = MT_DEVICE
  74         },
  75         {
  76                 .virtual        = DSP_IPI_24XX_VIRT,
  77                 .pfn            = __phys_to_pfn(DSP_IPI_24XX_PHYS),
  78                 .length         = DSP_IPI_24XX_SIZE,
  79                 .type           = MT_DEVICE
  80         },
  81         {
  82                 .virtual        = DSP_MMU_24XX_VIRT,
  83                 .pfn            = __phys_to_pfn(DSP_MMU_24XX_PHYS),
  84                 .length         = DSP_MMU_24XX_SIZE,
  85                 .type           = MT_DEVICE
  86         },
  87 };
  88
  89 #endif
  90
  91 #ifdef CONFIG_ARCH_OMAP2430
  92 static struct map_desc omap243x_io_desc[] __initdata = {
  93         {
  94                 .virtual        = L4_WK_243X_VIRT,
  95                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
  96                 .length         = L4_WK_243X_SIZE,
  97                 .type           = MT_DEVICE
  98         },
  99         {
 100                 .virtual        = OMAP243X_GPMC_VIRT,
 101                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
 102                 .length         = OMAP243X_GPMC_SIZE,
 103                 .type           = MT_DEVICE
 104         },
 105         {
 106                 .virtual        = OMAP243X_SDRC_VIRT,
 107                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
 108                 .length         = OMAP243X_SDRC_SIZE,
 109                 .type           = MT_DEVICE
 110         },
 111         {
 112                 .virtual        = OMAP243X_SMS_VIRT,
 113                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
 114                 .length         = OMAP243X_SMS_SIZE,
 115                 .type           = MT_DEVICE
 116         },
 117 };
 118 #endif
 119 #endif
 120
 121 #ifdef  CONFIG_ARCH_OMAP34XX
 122 static struct map_desc omap34xx_io_desc[] __initdata = {
 123         {
 124                 .virtual        = L3_34XX_VIRT,
 125                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
 126                 .length         = L3_34XX_SIZE,
 127                 .type           = MT_DEVICE
 128         },
 129         {
 130                 .virtual        = L4_34XX_VIRT,
 131                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
 132                 .length         = L4_34XX_SIZE,
 133                 .type           = MT_DEVICE
 134         },
 135         {
 136                 .virtual        = L4_WK_34XX_VIRT,
 137                 .pfn            = __phys_to_pfn(L4_WK_34XX_PHYS),
 138                 .length         = L4_WK_34XX_SIZE,
 139                 .type           = MT_DEVICE
 140         },
 141         {
 142                 .virtual        = OMAP34XX_GPMC_VIRT,
 143                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
 144                 .length         = OMAP34XX_GPMC_SIZE,
 145                 .type           = MT_DEVICE
 146         },
 147         {
 148                 .virtual        = OMAP343X_SMS_VIRT,
 149                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
 150                 .length         = OMAP343X_SMS_SIZE,
 151                 .type           = MT_DEVICE
 152         },
 153         {
 154                 .virtual        = OMAP343X_SDRC_VIRT,
 155                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
 156                 .length         = OMAP343X_SDRC_SIZE,
 157                 .type           = MT_DEVICE
 158         },
 159         {
 160                 .virtual        = L4_PER_34XX_VIRT,
 161                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
 162                 .length         = L4_PER_34XX_SIZE,
 163                 .type           = MT_DEVICE
 164         },
 165         {
 166                 .virtual        = L4_EMU_34XX_VIRT,
 167                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
 168                 .length         = L4_EMU_34XX_SIZE,
 169                 .type           = MT_DEVICE
 170         },
 171 };
 172 #endif
 173 #ifdef  CONFIG_ARCH_OMAP4
 174 static struct map_desc omap44xx_io_desc[] __initdata = {
 175         {
 176                 .virtual        = L3_44XX_VIRT,
 177                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
 178                 .length         = L3_44XX_SIZE,
 179                 .type           = MT_DEVICE,
 180         },
 181         {
 182                 .virtual        = L4_44XX_VIRT,
 183                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
 184                 .length         = L4_44XX_SIZE,
 185                 .type           = MT_DEVICE,
 186         },
 187         {
 188                 .virtual        = L4_WK_44XX_VIRT,
 189                 .pfn            = __phys_to_pfn(L4_WK_44XX_PHYS),
 190                 .length         = L4_WK_44XX_SIZE,
 191                 .type           = MT_DEVICE,
 192         },
 193         {
 194                 .virtual        = OMAP44XX_GPMC_VIRT,
 195                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
 196                 .length         = OMAP44XX_GPMC_SIZE,
 197                 .type           = MT_DEVICE,
 198         },
 199         {
 200                 .virtual        = L4_PER_44XX_VIRT,
 201                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
 202                 .length         = L4_PER_44XX_SIZE,
 203                 .type           = MT_DEVICE,
 204         },
 205         {
 206                 .virtual        = L4_EMU_44XX_VIRT,
 207                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
 208                 .length         = L4_EMU_44XX_SIZE,
 209                 .type           = MT_DEVICE,
 210         },
 211 };
 212 #endif
 213
 214 void __init omap2_map_common_io(void)
 215 {
 216 #if defined(CONFIG_ARCH_OMAP2420)
 217         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 218         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
 219 #endif
 220
 221 #if defined(CONFIG_ARCH_OMAP2430)
 222         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
 223         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
 224 #endif
 225
 226 #if defined(CONFIG_ARCH_OMAP34XX)
 227         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
 228 #endif
 229
 230 #if defined(CONFIG_ARCH_OMAP4)
 231         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
 232 #endif
 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         omapfb_reserve_sdram();
 243 }
 244
 245 /*
 246  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 247  *
 248  * Sets the CORE DPLL3 M2 divider to the same value that it's at
 249  * currently.  This has the effect of setting the SDRC SDRAM AC timing
 250  * registers to the values currently defined by the kernel.  Currently
 251  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 252  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 253  * or passes along the return value of clk_set_rate().
 254  */
 255 static int __init _omap2_init_reprogram_sdrc(void)
 256 {
 257         struct clk *dpll3_m2_ck;
 258         int v = -EINVAL;
 259         long rate;
 260
 261         if (!cpu_is_omap34xx())
 262                 return 0;
 263
 264         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
 265         if (!dpll3_m2_ck)
 266                 return -EINVAL;
 267
 268         rate = clk_get_rate(dpll3_m2_ck);
 269         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
 270         v = clk_set_rate(dpll3_m2_ck, rate);
 271         if (v)
 272                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
 273
 274         clk_put(dpll3_m2_ck);
 275
 276         return v;
 277 }
 278
 279 void __init omap2_init_common_hw(struct omap_sdrc_params *sp)
 280 {
 281         omap2_mux_init();
 282 #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
 283         pwrdm_init(powerdomains_omap);
 284         clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
 285         omap2_clk_init();
 286         omap2_sdrc_init(sp);
 287         _omap2_init_reprogram_sdrc();
 288 #endif
 289         gpmc_init();
 290 }