1 /* 2 * (C) Copyright 2005 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 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 25 #include <common.h> 26 #include <ioports.h> 27 #include <mpc83xx.h> 28 #include <asm/mpc8349_pci.h> 29 #include <i2c.h> 30 #include <miiphy.h> 31 #include <asm/mmu.h> 32 #include <pci.h> 33 #include <flash.h> 34 #include <mtd/cfi_flash.h> 35 36 DECLARE_GLOBAL_DATA_PTR; 37 38 #define IOSYNC asm("eieio") 39 #define ISYNC asm("isync") 40 #define SYNC asm("sync") 41 #define FPW FLASH_PORT_WIDTH 42 #define FPWV FLASH_PORT_WIDTHV 43 44 #define DDR_MAX_SIZE_PER_CS 0x20000000 45 46 #if defined(DDR_CASLAT_20) 47 #define TIMING_CASLAT TIMING_CFG1_CASLAT_20 48 #define MODE_CASLAT DDR_MODE_CASLAT_20 49 #else 50 #define TIMING_CASLAT TIMING_CFG1_CASLAT_25 51 #define MODE_CASLAT DDR_MODE_CASLAT_25 52 #endif 53 54 #define INITIAL_CS_CONFIG (CSCONFIG_EN | CSCONFIG_ROW_BIT_12 | \ 55 CSCONFIG_COL_BIT_9) 56 57 /* External definitions */ 58 ulong flash_get_size (ulong base, int banknum); 59 60 /* Local functions */ 61 static int detect_num_flash_banks(void); 62 static long int get_ddr_bank_size(short cs, long *base); 63 static void set_cs_bounds(short cs, long base, long size); 64 static void set_cs_config(short cs, long config); 65 static void set_ddr_config(void); 66 67 /* Local variable */ 68 static volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; 69 70 /************************************************************************** 71 * Board initialzation after relocation to RAM. Used to detect the number 72 * of Flash banks on TQM834x. 73 */ 74 int board_early_init_r (void) { 75 /* sanity check, IMMARBAR should be mirrored at offset zero of IMMR */ 76 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im) 77 return 0; 78 79 /* detect the number of Flash banks */ 80 return detect_num_flash_banks(); 81 } 82 83 /************************************************************************** 84 * DRAM initalization and size detection 85 */ 86 phys_size_t initdram (int board_type) 87 { 88 long bank_size; 89 long size; 90 int cs; 91 92 /* during size detection, set up the max DDRLAW size */ 93 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_BASE; 94 im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G); 95 96 /* set CS bounds to maximum size */ 97 for(cs = 0; cs < 4; ++cs) { 98 set_cs_bounds(cs, 99 CONFIG_SYS_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS), 100 DDR_MAX_SIZE_PER_CS); 101 102 set_cs_config(cs, INITIAL_CS_CONFIG); 103 } 104 105 /* configure ddr controller */ 106 set_ddr_config(); 107 108 udelay(200); 109 110 /* enable DDR controller */ 111 im->ddr.sdram_cfg = (SDRAM_CFG_MEM_EN | 112 SDRAM_CFG_SREN | 113 SDRAM_CFG_SDRAM_TYPE_DDR1); 114 SYNC; 115 116 /* size detection */ 117 debug("\n"); 118 size = 0; 119 for(cs = 0; cs < 4; ++cs) { 120 debug("\nDetecting Bank%d\n", cs); 121 122 bank_size = get_ddr_bank_size(cs, 123 (long *)(CONFIG_SYS_DDR_BASE + size)); 124 size += bank_size; 125 126 debug("DDR Bank%d size: %ld MiB\n\n", cs, bank_size >> 20); 127 128 /* exit if less than one bank */ 129 if(size < DDR_MAX_SIZE_PER_CS) break; 130 } 131 132 return size; 133 } 134 135 /************************************************************************** 136 * checkboard() 137 */ 138 int checkboard (void) 139 { 140 puts("Board: TQM834x\n"); 141 142 #ifdef CONFIG_PCI 143 volatile immap_t * immr; 144 u32 w, f; 145 146 immr = (immap_t *)CONFIG_SYS_IMMR; 147 if (!(immr->reset.rcwh & HRCWH_PCI_HOST)) { 148 printf("PCI: NOT in host mode..?!\n"); 149 return 0; 150 } 151 152 /* get bus width */ 153 w = 32; 154 if (immr->reset.rcwh & HRCWH_64_BIT_PCI) 155 w = 64; 156 157 /* get clock */ 158 f = gd->pci_clk; 159 160 printf("PCI1: %d bit, %d MHz\n", w, f / 1000000); 161 #else 162 printf("PCI: disabled\n"); 163 #endif 164 return 0; 165 } 166 167 168 /************************************************************************** 169 * 170 * Local functions 171 * 172 *************************************************************************/ 173 174 /************************************************************************** 175 * Detect the number of flash banks (1 or 2). Store it in 176 * a global variable tqm834x_num_flash_banks. 177 * Bank detection code based on the Monitor code. 178 */ 179 static int detect_num_flash_banks(void) 180 { 181 typedef unsigned long FLASH_PORT_WIDTH; 182 typedef volatile unsigned long FLASH_PORT_WIDTHV; 183 FPWV *bank1_base; 184 FPWV *bank2_base; 185 FPW bank1_read; 186 FPW bank2_read; 187 ulong bank1_size; 188 ulong bank2_size; 189 ulong total_size; 190 191 cfi_flash_num_flash_banks = 2; /* assume two banks */ 192 193 /* Get bank 1 and 2 information */ 194 bank1_size = flash_get_size(CONFIG_SYS_FLASH_BASE, 0); 195 debug("Bank1 size: %lu\n", bank1_size); 196 bank2_size = flash_get_size(CONFIG_SYS_FLASH_BASE + bank1_size, 1); 197 debug("Bank2 size: %lu\n", bank2_size); 198 total_size = bank1_size + bank2_size; 199 200 if (bank2_size > 0) { 201 /* Seems like we've got bank 2, but maybe it's mirrored 1 */ 202 203 /* Set the base addresses */ 204 bank1_base = (FPWV *) (CONFIG_SYS_FLASH_BASE); 205 bank2_base = (FPWV *) (CONFIG_SYS_FLASH_BASE + bank1_size); 206 207 /* Put bank 2 into CFI command mode and read */ 208 bank2_base[0x55] = 0x00980098; 209 IOSYNC; 210 ISYNC; 211 bank2_read = bank2_base[0x10]; 212 213 /* Read from bank 1 (it's in read mode) */ 214 bank1_read = bank1_base[0x10]; 215 216 /* Reset Flash */ 217 bank1_base[0] = 0x00F000F0; 218 bank2_base[0] = 0x00F000F0; 219 220 if (bank2_read == bank1_read) { 221 /* 222 * Looks like just one bank, but not sure yet. Let's 223 * read from bank 2 in autosoelect mode. 224 */ 225 bank2_base[0x0555] = 0x00AA00AA; 226 bank2_base[0x02AA] = 0x00550055; 227 bank2_base[0x0555] = 0x00900090; 228 IOSYNC; 229 ISYNC; 230 bank2_read = bank2_base[0x10]; 231 232 /* Read from bank 1 (it's in read mode) */ 233 bank1_read = bank1_base[0x10]; 234 235 /* Reset Flash */ 236 bank1_base[0] = 0x00F000F0; 237 bank2_base[0] = 0x00F000F0; 238 239 if (bank2_read == bank1_read) { 240 /* 241 * In both CFI command and autoselect modes, 242 * we got the some data reading from Flash. 243 * There is only one mirrored bank. 244 */ 245 cfi_flash_num_flash_banks = 1; 246 total_size = bank1_size; 247 } 248 } 249 } 250 251 debug("Number of flash banks detected: %d\n", cfi_flash_num_flash_banks); 252 253 /* set OR0 and BR0 */ 254 set_lbc_or(0, CONFIG_SYS_OR_TIMING_FLASH | 255 (-(total_size) & OR_GPCM_AM)); 256 set_lbc_br(0, (CONFIG_SYS_FLASH_BASE & BR_BA) | 257 (BR_MS_GPCM | BR_PS_32 | BR_V)); 258 259 return (0); 260 } 261 262 /************************************************************************* 263 * Detect the size of a ddr bank. Sets CS bounds and CS config accordingly. 264 */ 265 static long int get_ddr_bank_size(short cs, long *base) 266 { 267 /* This array lists all valid DDR SDRAM configurations, with 268 * Bank sizes in bytes. (Refer to Table 9-27 in the MPC8349E RM). 269 * The last entry has to to have size equal 0 and is igonred during 270 * autodection. Bank sizes must be in increasing order of size 271 */ 272 struct { 273 long row; 274 long col; 275 long size; 276 } conf[] = { 277 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_8, 32 << 20}, 278 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_9, 64 << 20}, 279 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_10, 128 << 20}, 280 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_9, 128 << 20}, 281 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_10, 256 << 20}, 282 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_11, 512 << 20}, 283 {CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_10, 512 << 20}, 284 {CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_11, 1024 << 20}, 285 {0, 0, 0} 286 }; 287 288 int i; 289 int detected; 290 long size; 291 292 detected = -1; 293 for(i = 0; conf[i].size != 0; ++i) { 294 295 /* set sdram bank configuration */ 296 set_cs_config(cs, CSCONFIG_EN | conf[i].col | conf[i].row); 297 298 debug("Getting RAM size...\n"); 299 size = get_ram_size(base, DDR_MAX_SIZE_PER_CS); 300 301 if((size == conf[i].size) && (i == detected + 1)) 302 detected = i; 303 304 debug("Trying %ld x %ld (%ld MiB) at addr %p, detected: %ld MiB\n", 305 conf[i].row, 306 conf[i].col, 307 conf[i].size >> 20, 308 base, 309 size >> 20); 310 } 311 312 if(detected == -1){ 313 /* disable empty cs */ 314 debug("\nNo valid configurations for CS%d, disabling...\n", cs); 315 set_cs_config(cs, 0); 316 return 0; 317 } 318 319 debug("\nDetected configuration %ld x %ld (%ld MiB) at addr %p\n", 320 conf[detected].row, conf[detected].col, conf[detected].size >> 20, base); 321 322 /* configure cs ro detected params */ 323 set_cs_config(cs, CSCONFIG_EN | conf[detected].row | 324 conf[detected].col); 325 326 set_cs_bounds(cs, (long)base, conf[detected].size); 327 328 return(conf[detected].size); 329 } 330 331 /************************************************************************** 332 * Sets DDR bank CS bounds. 333 */ 334 static void set_cs_bounds(short cs, long base, long size) 335 { 336 debug("Setting bounds %08lx, %08lx for cs %d\n", base, size, cs); 337 if(size == 0){ 338 im->ddr.csbnds[cs].csbnds = 0x00000000; 339 } else { 340 im->ddr.csbnds[cs].csbnds = 341 ((base >> CSBNDS_SA_SHIFT) & CSBNDS_SA) | 342 (((base + size - 1) >> CSBNDS_EA_SHIFT) & 343 CSBNDS_EA); 344 } 345 SYNC; 346 } 347 348 /************************************************************************** 349 * Sets DDR banks CS configuration. 350 * config == 0x00000000 disables the CS. 351 */ 352 static void set_cs_config(short cs, long config) 353 { 354 debug("Setting config %08lx for cs %d\n", config, cs); 355 im->ddr.cs_config[cs] = config; 356 SYNC; 357 } 358 359 /************************************************************************** 360 * Sets DDR clocks, timings and configuration. 361 */ 362 static void set_ddr_config(void) { 363 /* clock control */ 364 im->ddr.sdram_clk_cntl = DDR_SDRAM_CLK_CNTL_SS_EN | 365 DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05; 366 SYNC; 367 368 /* timing configuration */ 369 im->ddr.timing_cfg_1 = 370 (4 << TIMING_CFG1_PRETOACT_SHIFT) | 371 (7 << TIMING_CFG1_ACTTOPRE_SHIFT) | 372 (4 << TIMING_CFG1_ACTTORW_SHIFT) | 373 (5 << TIMING_CFG1_REFREC_SHIFT) | 374 (3 << TIMING_CFG1_WRREC_SHIFT) | 375 (3 << TIMING_CFG1_ACTTOACT_SHIFT) | 376 (1 << TIMING_CFG1_WRTORD_SHIFT) | 377 (TIMING_CFG1_CASLAT & TIMING_CASLAT); 378 379 im->ddr.timing_cfg_2 = 380 TIMING_CFG2_CPO_DEF | 381 (2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT); 382 SYNC; 383 384 /* don't enable DDR controller yet */ 385 im->ddr.sdram_cfg = 386 SDRAM_CFG_SREN | 387 SDRAM_CFG_SDRAM_TYPE_DDR1; 388 SYNC; 389 390 /* Set SDRAM mode */ 391 im->ddr.sdram_mode = 392 ((DDR_MODE_EXT_MODEREG | DDR_MODE_WEAK) << 393 SDRAM_MODE_ESD_SHIFT) | 394 ((DDR_MODE_MODEREG | DDR_MODE_BLEN_4) << 395 SDRAM_MODE_SD_SHIFT) | 396 ((DDR_MODE_CASLAT << SDRAM_MODE_SD_SHIFT) & 397 MODE_CASLAT); 398 SYNC; 399 400 /* Set fast SDRAM refresh rate */ 401 im->ddr.sdram_interval = 402 (DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) | 403 (DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT); 404 SYNC; 405 406 /* Workaround for DDR6 Erratum 407 * see MPC8349E Device Errata Rev.8, 2/2006 408 * This workaround influences the MPC internal "input enables" 409 * dependent on CAS latency and MPC revision. According to errata 410 * sheet the internal reserved registers for this workaround are 411 * not available from revision 2.0 and up. 412 */ 413 414 /* Get REVID from register SPRIDR. Skip workaround if rev >= 2.0 415 * (0x200) 416 */ 417 if ((im->sysconf.spridr & SPRIDR_REVID) < 0x200) { 418 419 /* There is a internal reserved register at IMMRBAR+0x2F00 420 * which has to be written with a certain value defined by 421 * errata sheet. 422 */ 423 u32 *reserved_p = (u32 *)((u8 *)im + 0x2f00); 424 425 #if defined(DDR_CASLAT_20) 426 *reserved_p = 0x201c0000; 427 #else 428 *reserved_p = 0x202c0000; 429 #endif 430 } 431 } 432 433 #ifdef CONFIG_OF_BOARD_SETUP 434 void ft_board_setup(void *blob, bd_t *bd) 435 { 436 ft_cpu_setup(blob, bd); 437 438 #ifdef CONFIG_PCI 439 ft_pci_setup(blob, bd); 440 #endif /* CONFIG_PCI */ 441 } 442 #endif /* CONFIG_OF_BOARD_SETUP */ 443