Peter Pearse | 5ca9881 | 2007-11-09 15:24:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2005-2007 |
| 3 | * Samsung Electronics, |
| 4 | * Kyungmin Park <kyungmin.park@samsung.com> |
| 5 | * |
| 6 | * Derived from omap2420 |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <asm/arch/omap2420.h> |
| 26 | #include <asm/io.h> |
| 27 | #include <asm/arch/bits.h> |
| 28 | #include <asm/arch/mem.h> /* get mem tables */ |
| 29 | #include <asm/arch/sys_proto.h> |
| 30 | #include <asm/arch/sys_info.h> |
| 31 | #include <i2c.h> |
| 32 | |
| 33 | /************************************************************************** |
| 34 | * get_prod_id() - get id info from chips |
| 35 | ***************************************************************************/ |
| 36 | static u32 get_prod_id(void) |
| 37 | { |
| 38 | u32 p; |
| 39 | p = __raw_readl(PRODUCTION_ID); /* get production ID */ |
| 40 | return ((p & CPU_242X_PID_MASK) >> 16); |
| 41 | } |
| 42 | /************************************************************************** |
| 43 | * get_cpu_type() - low level get cpu type |
| 44 | * - no C globals yet. |
| 45 | * - just looking to say if this is a 2422 or 2420 or ... |
| 46 | * - to start with we will look at switch settings.. |
| 47 | * - 2422 id's same as 2420 for ES1 will rely on H4 board characteristics |
| 48 | * (mux for 2420, non-mux for 2422). |
| 49 | ***************************************************************************/ |
| 50 | u32 get_cpu_type(void) |
| 51 | { |
| 52 | u32 v; |
| 53 | |
| 54 | switch (get_prod_id()) { |
| 55 | case 1:; /* 2420 */ |
| 56 | case 2: |
| 57 | return (CPU_2420); |
| 58 | break; /* 2420 pop */ |
| 59 | case 4: |
| 60 | return (CPU_2422); |
| 61 | break; |
| 62 | case 8: |
| 63 | return (CPU_2423); |
| 64 | break; |
| 65 | default: |
| 66 | break; /* early 2420/2422's unmarked */ |
| 67 | } |
| 68 | |
| 69 | v = __raw_readl(TAP_IDCODE_REG); |
| 70 | v &= CPU_24XX_ID_MASK; |
| 71 | if (v == CPU_2420_CHIPID) { /* currently 2420 and 2422 have same id */ |
| 72 | if (is_gpmc_muxed() == GPMC_MUXED) /* if mux'ed */ |
| 73 | return (CPU_2420); |
| 74 | else |
| 75 | return (CPU_2422); |
| 76 | } else |
| 77 | return (CPU_2420); /* don't know, say 2420 */ |
| 78 | } |
| 79 | |
| 80 | /****************************************** |
| 81 | * get_cpu_rev(void) - extract version info |
| 82 | ******************************************/ |
| 83 | u32 get_cpu_rev(void) |
| 84 | { |
| 85 | u32 v; |
| 86 | v = __raw_readl(TAP_IDCODE_REG); |
| 87 | v = v >> 28; |
| 88 | return (v + 1); /* currently 2422 and 2420 match up */ |
| 89 | } |
| 90 | |
| 91 | /**************************************************** |
| 92 | * is_mem_sdr() - return 1 if mem type in use is SDR |
| 93 | ****************************************************/ |
| 94 | u32 is_mem_sdr(void) |
| 95 | { |
| 96 | volatile u32 *burst = (volatile u32 *)(SDRC_MR_0 + SDRC_CS0_OSET); |
| 97 | if (*burst == H4_2420_SDRC_MR_0_SDR) |
| 98 | return (1); |
| 99 | return (0); |
| 100 | } |
| 101 | |
| 102 | /*********************************************************** |
| 103 | * get_mem_type() - identify type of mDDR part used. |
| 104 | * 2422 uses stacked DDR, 2 parts CS0/CS1. |
| 105 | * 2420 may have 1 or 2, no good way to know...only init 1... |
| 106 | * when eeprom data is up we can select 1 more. |
| 107 | *************************************************************/ |
| 108 | u32 get_mem_type(void) |
| 109 | { |
| 110 | u32 cpu, sdr = is_mem_sdr(); |
| 111 | |
| 112 | cpu = get_cpu_type(); |
| 113 | if (cpu == CPU_2422 || cpu == CPU_2423) |
| 114 | return (DDR_STACKED); |
| 115 | |
| 116 | if (get_prod_id() == 0x2) |
| 117 | return (XDR_POP); |
| 118 | |
| 119 | if (get_board_type() == BOARD_H4_MENELAUS) |
| 120 | if (sdr) |
| 121 | return (SDR_DISCRETE); |
| 122 | else |
| 123 | return (DDR_COMBO); |
| 124 | else if (sdr) /* SDP + SDR kit */ |
| 125 | return (SDR_DISCRETE); |
| 126 | else |
| 127 | return (DDR_DISCRETE); /* origional SDP */ |
| 128 | } |
| 129 | |
| 130 | /********************************************************************** |
| 131 | * |
| 132 | * get_cs0_size() - get size of chip select 0/1 |
| 133 | ************************************************************************/ |
| 134 | u32 get_sdr_cs_size(u32 offset) |
| 135 | { |
| 136 | u32 size; |
| 137 | size = __raw_readl(SDRC_MCFG_0 + offset) >> 8; /* get ram size field */ |
| 138 | size &= 0x2FF; /* remove unwanted bits */ |
| 139 | size *= SZ_2M; /* find size in MB */ |
| 140 | return (size); |
| 141 | } |
| 142 | |
| 143 | /********************************************************************** |
| 144 | * |
| 145 | * get_board_type() - get board type based on current production stats. |
| 146 | * --- NOTE: 2 I2C EEPROMs will someday be populated with proper info. |
| 147 | * when they are available we can get info from there. This should |
| 148 | * be correct of all known boards up until today. |
| 149 | ************************************************************************/ |
| 150 | u32 get_board_type(void) |
| 151 | { |
| 152 | #if 0 |
| 153 | if (i2c_probe(I2C_MENELAUS) == 0) |
| 154 | return (BOARD_H4_MENELAUS); |
| 155 | else |
| 156 | #endif |
| 157 | return (BOARD_H4_SDP); |
| 158 | } |
| 159 | |
| 160 | /****************************************************************** |
| 161 | * get_sysboot_value() - get init word settings (dip switch on h4) |
| 162 | ******************************************************************/ |
| 163 | inline u32 get_sysboot_value(void) |
| 164 | { |
| 165 | return (0x00000FFF & __raw_readl(CONTROL_STATUS)); |
| 166 | } |
| 167 | |
| 168 | /*************************************************************************** |
| 169 | * get_gpmc0_base() - Return current address hardware will be |
| 170 | * fetching from. The below effectively gives what is correct, its a bit |
| 171 | * mis-leading compared to the TRM. For the most general case the mask |
| 172 | * needs to be also taken into account this does work in practice. |
| 173 | * - for u-boot we currently map: |
| 174 | * -- 0 to nothing, |
| 175 | * -- 4 to flash |
| 176 | * -- 8 to enent |
| 177 | * -- c to wifi |
| 178 | ***************************************************************************/ |
| 179 | u32 get_gpmc0_base(void) |
| 180 | { |
| 181 | u32 b; |
| 182 | |
| 183 | b = __raw_readl(GPMC_CONFIG7_0); |
| 184 | b &= 0x1F; /* keep base [5:0] */ |
| 185 | b = b << 24; /* ret 0x0b000000 */ |
| 186 | return (b); |
| 187 | } |
| 188 | |
| 189 | /***************************************************************** |
| 190 | * is_gpmc_muxed() - tells if address/data lines are multiplexed |
| 191 | *****************************************************************/ |
| 192 | u32 is_gpmc_muxed(void) |
| 193 | { |
| 194 | u32 mux; |
| 195 | mux = get_sysboot_value(); |
| 196 | if ((mux & (BIT0 | BIT1 | BIT2 | BIT3)) == (BIT0 | BIT2 | BIT3)) |
| 197 | return (GPMC_MUXED); /* NAND Boot mode */ |
| 198 | if (mux & BIT1) /* if mux'ed */ |
| 199 | return (GPMC_MUXED); |
| 200 | else |
| 201 | return (GPMC_NONMUXED); |
| 202 | } |
| 203 | |
| 204 | /************************************************************************ |
| 205 | * get_gpmc0_type() - read sysboot lines to see type of memory attached |
| 206 | ************************************************************************/ |
| 207 | u32 get_gpmc0_type(void) |
| 208 | { |
| 209 | u32 type; |
| 210 | type = get_sysboot_value(); |
| 211 | if ((type & (BIT3 | BIT2)) == (BIT3 | BIT2)) |
| 212 | return (TYPE_NAND); |
| 213 | else |
| 214 | return (TYPE_NOR); |
| 215 | } |
| 216 | |
| 217 | /******************************************************************* |
| 218 | * get_gpmc0_width() - See if bus is in x8 or x16 (mainly for nand) |
| 219 | *******************************************************************/ |
| 220 | u32 get_gpmc0_width(void) |
| 221 | { |
| 222 | u32 width; |
| 223 | width = get_sysboot_value(); |
| 224 | if ((width & 0xF) == (BIT3 | BIT2)) |
| 225 | return (WIDTH_8BIT); |
| 226 | else |
| 227 | return (WIDTH_16BIT); |
| 228 | } |
| 229 | |
| 230 | /********************************************************************* |
| 231 | * wait_on_value() - common routine to allow waiting for changes in |
| 232 | * volatile regs. |
| 233 | *********************************************************************/ |
| 234 | u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, |
| 235 | u32 bound) { |
| 236 | u32 i = 0, val; |
| 237 | do { |
| 238 | ++i; |
| 239 | val = __raw_readl(read_addr) & read_bit_mask; |
| 240 | if (val == match_value) |
| 241 | return (1); |
| 242 | if (i == bound) |
| 243 | return (0); |
| 244 | } while (1); |
| 245 | } |
| 246 | |
| 247 | /********************************************************************* |
| 248 | * display_board_info() - print banner with board info. |
| 249 | *********************************************************************/ |
| 250 | void display_board_info(u32 btype) |
| 251 | { |
| 252 | char cpu_2420[] = "2420"; /* cpu type */ |
| 253 | char cpu_2422[] = "2422"; |
| 254 | char cpu_2423[] = "2423"; |
| 255 | char db_men[] = "Menelaus"; /* board type */ |
| 256 | char db_ip[] = "IP"; |
| 257 | char mem_sdr[] = "mSDR"; /* memory type */ |
| 258 | char mem_ddr[] = "mDDR"; |
| 259 | char t_tst[] = "TST"; /* security level */ |
| 260 | char t_emu[] = "EMU"; |
| 261 | char t_hs[] = "HS"; |
| 262 | char t_gp[] = "GP"; |
| 263 | char unk[] = "?"; |
| 264 | |
| 265 | char *cpu_s, *db_s, *mem_s, *sec_s; |
| 266 | u32 cpu, rev, sec; |
| 267 | |
| 268 | rev = get_cpu_rev(); |
| 269 | cpu = get_cpu_type(); |
| 270 | sec = get_device_type(); |
| 271 | |
| 272 | if (is_mem_sdr()) |
| 273 | mem_s = mem_sdr; |
| 274 | else |
| 275 | mem_s = mem_ddr; |
| 276 | |
| 277 | if (cpu == CPU_2423) |
| 278 | cpu_s = cpu_2423; |
| 279 | else if (cpu == CPU_2422) |
| 280 | cpu_s = cpu_2422; |
| 281 | else |
| 282 | cpu_s = cpu_2420; |
| 283 | |
| 284 | if (btype == BOARD_H4_MENELAUS) |
| 285 | db_s = db_men; |
| 286 | else |
| 287 | db_s = db_ip; |
| 288 | |
| 289 | switch (sec) { |
| 290 | case TST_DEVICE: |
| 291 | sec_s = t_tst; |
| 292 | break; |
| 293 | case EMU_DEVICE: |
| 294 | sec_s = t_emu; |
| 295 | break; |
| 296 | case HS_DEVICE: |
| 297 | sec_s = t_hs; |
| 298 | break; |
| 299 | case GP_DEVICE: |
| 300 | sec_s = t_gp; |
| 301 | break; |
| 302 | default: |
| 303 | sec_s = unk; |
| 304 | } |
| 305 | |
| 306 | printf("OMAP%s-%s revision %d\n", cpu_s, sec_s, rev - 1); |
| 307 | printf("Samsung Apollon SDP Base Board + %s \n", mem_s); } |
| 308 | |
| 309 | /************************************************************************* |
| 310 | * get_board_rev() - setup to pass kernel board revision information |
| 311 | * 0 = 242x IP platform (first 2xx boards) |
| 312 | * 1 = 242x Menelaus platfrom. |
| 313 | *************************************************************************/ |
| 314 | u32 get_board_rev(void) |
| 315 | { |
| 316 | u32 rev = 0; |
| 317 | u32 btype = get_board_type(); |
| 318 | |
| 319 | if (btype == BOARD_H4_MENELAUS) { |
| 320 | rev = 1; |
| 321 | } |
| 322 | return (rev); |
| 323 | } |
| 324 | |
| 325 | /******************************************************** |
| 326 | * get_base(); get upper addr of current execution |
| 327 | *******************************************************/ |
| 328 | u32 get_base(void) |
| 329 | { |
| 330 | u32 val; |
| 331 | __asm__ __volatile__("mov %0, pc \n":"=r"(val)::"memory"); |
| 332 | val &= 0xF0000000; |
| 333 | val >>= 28; |
| 334 | return (val); |
| 335 | } |
| 336 | |
| 337 | /******************************************************** |
| 338 | * get_base2(); get 2upper addr of current execution |
| 339 | *******************************************************/ |
| 340 | u32 get_base2(void) |
| 341 | { |
| 342 | u32 val; |
| 343 | __asm__ __volatile__("mov %0, pc \n":"=r"(val)::"memory"); |
| 344 | val &= 0xFF000000; |
| 345 | val >>= 24; |
| 346 | return (val); |
| 347 | } |
| 348 | |
| 349 | /******************************************************** |
| 350 | * running_in_flash() - tell if currently running in |
| 351 | * flash. |
| 352 | *******************************************************/ |
| 353 | u32 running_in_flash(void) |
| 354 | { |
| 355 | if (get_base() < 4) |
| 356 | return (1); /* in flash */ |
| 357 | return (0); /* running in SRAM or SDRAM */ |
| 358 | } |
| 359 | |
| 360 | /******************************************************** |
| 361 | * running_in_sram() - tell if currently running in |
| 362 | * sram. |
| 363 | *******************************************************/ |
| 364 | u32 running_in_sram(void) |
| 365 | { |
| 366 | if (get_base() == 4) |
| 367 | return (1); /* in SRAM */ |
| 368 | return (0); /* running in FLASH or SDRAM */ |
| 369 | } |
| 370 | |
| 371 | /******************************************************** |
| 372 | * running_in_sdram() - tell if currently running in |
| 373 | * flash. |
| 374 | *******************************************************/ |
| 375 | u32 running_in_sdram(void) |
| 376 | { |
| 377 | if (get_base() > 4) |
| 378 | return (1); /* in sdram */ |
| 379 | return (0); /* running in SRAM or FLASH */ |
| 380 | } |
| 381 | |
| 382 | /************************************************************* |
| 383 | * running_from_internal_boot() - am I a signed NOR image. |
| 384 | *************************************************************/ |
| 385 | u32 running_from_internal_boot(void) |
| 386 | { |
| 387 | u32 v, base; |
| 388 | |
| 389 | v = get_sysboot_value() & BIT3; |
| 390 | base = get_base2(); |
| 391 | /* if running at mask rom flash address and |
| 392 | * sysboot3 says this was an internal boot |
| 393 | */ |
| 394 | if ((base == 0x08) && v) |
| 395 | return (1); |
| 396 | else |
| 397 | return (0); |
| 398 | } |
| 399 | |
| 400 | /************************************************************* |
| 401 | * get_device_type(): tell if GP/HS/EMU/TST |
| 402 | *************************************************************/ |
| 403 | u32 get_device_type(void) |
| 404 | { |
| 405 | int mode; |
| 406 | mode = __raw_readl(CONTROL_STATUS) & (BIT10 | BIT9 | BIT8); |
| 407 | return (mode >>= 8); |
| 408 | } |