cpu/arm_cortexa8/omap3/sys_info.c

   1 /*
   2  * (C) Copyright 2008
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Author :
   6  *      Manikandan Pillai <mani.pillai@ti.com>
   7  *
   8  * Derived from Beagle Board and 3430 SDP code by
   9  *      Richard Woodruff <r-woodruff2@ti.com>
  10  *      Syed Mohammed Khasim <khasim@ti.com>
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 #include <common.h>
  29 #include <asm/io.h>
  30 #include <asm/arch/mem.h>       /* get mem tables */
  31 #include <asm/arch/sys_proto.h>
  32 #include <i2c.h>
  33
  34 extern omap3_sysinfo sysinfo;
  35 static gpmc_csx_t *gpmc_cs_base = (gpmc_csx_t *)GPMC_CONFIG_CS0_BASE;
  36 static sdrc_t *sdrc_base = (sdrc_t *)OMAP34XX_SDRC_BASE;
  37 static ctrl_t *ctrl_base = (ctrl_t *)OMAP34XX_CTRL_BASE;
  38
  39 /******************************************
  40  * get_cpu_type(void) - extract cpu info
  41  ******************************************/
  42 u32 get_cpu_type(void)
  43 {
  44         return readl(&ctrl_base->ctrl_omap_stat);
  45 }
  46
  47 /******************************************
  48  * get_cpu_rev(void) - extract version info
  49  ******************************************/
  50 u32 get_cpu_rev(void)
  51 {
  52         u32 cpuid = 0;
  53
  54         /*
  55          * On ES1.0 the IDCODE register is not exposed on L4
  56          * so using CPU ID to differentiate
  57          * between ES2.0 and ES1.0.
  58          */
  59         __asm__ __volatile__("mrc p15, 0, %0, c0, c0, 0":"=r"(cpuid));
  60         if ((cpuid & 0xf) == 0x0)
  61                 return CPU_3430_ES1;
  62         else
  63                 return CPU_3430_ES2;
  64
  65 }
  66
  67 /****************************************************
  68  * is_mem_sdr() - return 1 if mem type in use is SDR
  69  ****************************************************/
  70 u32 is_mem_sdr(void)
  71 {
  72         if (readl(&sdrc_base->cs[CS0].mr) == SDP_SDRC_MR_0_SDR)
  73                 return 1;
  74         return 0;
  75 }
  76
  77 /***********************************************************************
  78  * get_cs0_size() - get size of chip select 0/1
  79  ************************************************************************/
  80 u32 get_sdr_cs_size(u32 cs)
  81 {
  82         u32 size;
  83
  84         /* get ram size field */
  85         size = readl(&sdrc_base->cs[cs].mcfg) >> 8;
  86         size &= 0x3FF;          /* remove unwanted bits */
  87         size *= SZ_2M;          /* find size in MB */
  88         return size;
  89 }
  90
  91 /***********************************************************************
  92  * get_sdr_cs_offset() - get offset of cs from cs0 start
  93  ************************************************************************/
  94 u32 get_sdr_cs_offset(u32 cs)
  95 {
  96         u32 offset;
  97
  98         if (!cs)
  99                 return 0;
 100
 101         offset = readl(&sdrc_base->cs_cfg);
 102         offset = (offset & 15) << 27 | (offset & 0x30) >> 17;
 103
 104         return offset;
 105 }
 106
 107 /***********************************************************************
 108  * get_board_type() - get board type based on current production stats.
 109  *  - NOTE-1-: 2 I2C EEPROMs will someday be populated with proper info.
 110  *    when they are available we can get info from there.  This should
 111  *    be correct of all known boards up until today.
 112  *  - NOTE-2- EEPROMs are populated but they are updated very slowly.  To
 113  *    avoid waiting on them we will use ES version of the chip to get info.
 114  *    A later version of the FPGA migth solve their speed issue.
 115  ************************************************************************/
 116 u32 get_board_type(void)
 117 {
 118         if (get_cpu_rev() == CPU_3430_ES2)
 119                 return sysinfo.board_type_v2;
 120         else
 121                 return sysinfo.board_type_v1;
 122 }
 123
 124 /***************************************************************************
 125  *  get_gpmc0_base() - Return current address hardware will be
 126  *     fetching from. The below effectively gives what is correct, its a bit
 127  *   mis-leading compared to the TRM.  For the most general case the mask
 128  *   needs to be also taken into account this does work in practice.
 129  *   - for u-boot we currently map:
 130  *       -- 0 to nothing,
 131  *       -- 4 to flash
 132  *       -- 8 to enent
 133  *       -- c to wifi
 134  ****************************************************************************/
 135 u32 get_gpmc0_base(void)
 136 {
 137         u32 b;
 138
 139         b = readl(&gpmc_cs_base->config7);
 140         b &= 0x1F;              /* keep base [5:0] */
 141         b = b << 24;            /* ret 0x0b000000 */
 142         return b;
 143 }
 144
 145 /*******************************************************************
 146  * get_gpmc0_width() - See if bus is in x8 or x16 (mainly for nand)
 147  *******************************************************************/
 148 u32 get_gpmc0_width(void)
 149 {
 150         return WIDTH_16BIT;
 151 }
 152
 153 /*************************************************************************
 154  * get_board_rev() - setup to pass kernel board revision information
 155  * returns:(bit[0-3] sub version, higher bit[7-4] is higher version)
 156  *************************************************************************/
 157 u32 get_board_rev(void)
 158 {
 159         return 0x20;
 160 }
 161
 162 /*********************************************************************
 163  *  display_board_info() - print banner with board info.
 164  *********************************************************************/
 165 void display_board_info(u32 btype)
 166 {
 167         char *cpu_s, *mem_s, *sec_s;
 168
 169         switch (get_cpu_type()) {
 170         case OMAP3503:
 171                 cpu_s = "3503";
 172                 break;
 173         case OMAP3515:
 174                 cpu_s = "3515";
 175                 break;
 176         case OMAP3525:
 177                 cpu_s = "3525";
 178                 break;
 179         case OMAP3530:
 180                 cpu_s = "3530";
 181                 break;
 182         default:
 183                 cpu_s = "35XX";
 184                 break;
 185         }
 186
 187         if (is_mem_sdr())
 188                 mem_s = "mSDR";
 189         else
 190                 mem_s = "LPDDR";
 191
 192         switch (get_device_type()) {
 193         case TST_DEVICE:
 194                 sec_s = "TST";
 195                 break;
 196         case EMU_DEVICE:
 197                 sec_s = "EMU";
 198                 break;
 199         case HS_DEVICE:
 200                 sec_s = "HS";
 201                 break;
 202         case GP_DEVICE:
 203                 sec_s = "GP";
 204                 break;
 205         default:
 206                 sec_s = "?";
 207         }
 208
 209
 210         printf("OMAP%s-%s rev %d, CPU-OPP2 L3-165MHz\n", cpu_s,
 211                sec_s, get_cpu_rev());
 212         printf("%s + %s/%s\n", sysinfo.board_string,
 213                mem_s, sysinfo.nand_string);
 214
 215 }
 216
 217 /********************************************************
 218  *  get_base(); get upper addr of current execution
 219  *******************************************************/
 220 u32 get_base(void)
 221 {
 222         u32 val;
 223
 224         __asm__ __volatile__("mov %0, pc \n":"=r"(val)::"memory");
 225         val &= 0xF0000000;
 226         val >>= 28;
 227         return val;
 228 }
 229
 230 /********************************************************
 231  *  is_running_in_flash() - tell if currently running in
 232  *  FLASH.
 233  *******************************************************/
 234 u32 is_running_in_flash(void)
 235 {
 236         if (get_base() < 4)
 237                 return 1;       /* in FLASH */
 238
 239         return 0;               /* running in SRAM or SDRAM */
 240 }
 241
 242 /********************************************************
 243  *  is_running_in_sram() - tell if currently running in
 244  *  SRAM.
 245  *******************************************************/
 246 u32 is_running_in_sram(void)
 247 {
 248         if (get_base() == 4)
 249                 return 1;       /* in SRAM */
 250
 251         return 0;               /* running in FLASH or SDRAM */
 252 }
 253
 254 /********************************************************
 255  *  is_running_in_sdram() - tell if currently running in
 256  *  SDRAM.
 257  *******************************************************/
 258 u32 is_running_in_sdram(void)
 259 {
 260         if (get_base() > 4)
 261                 return 1;       /* in SDRAM */
 262
 263         return 0;               /* running in SRAM or FLASH */
 264 }
 265
 266 /***************************************************************
 267  *  get_boot_type() - Is this an XIP type device or a stream one
 268  *  bits 4-0 specify type. Bit 5 says mem/perif
 269  ***************************************************************/
 270 u32 get_boot_type(void)
 271 {
 272         return (readl(&ctrl_base->status) & SYSBOOT_MASK);
 273 }
 274
 275 /*************************************************************
 276  *  get_device_type(): tell if GP/HS/EMU/TST
 277  *************************************************************/
 278 u32 get_device_type(void)
 279 {
 280         return ((readl(&ctrl_base->status) & (DEVICE_MASK)) >> 8);
 281 }