1 /* 2 * (C) Copyright 2005 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <ioports.h> 10 #include <mpc83xx.h> 11 #include <asm/mpc8349_pci.h> 12 #include <i2c.h> 13 #include <miiphy.h> 14 #include <asm/mmu.h> 15 #include <pci.h> 16 #include <flash.h> 17 #include <mtd/cfi_flash.h> 18 19 DECLARE_GLOBAL_DATA_PTR; 20 21 #define IOSYNC asm("eieio") 22 #define ISYNC asm("isync") 23 #define SYNC asm("sync") 24 #define FPW FLASH_PORT_WIDTH 25 #define FPWV FLASH_PORT_WIDTHV 26 27 #define DDR_MAX_SIZE_PER_CS 0x20000000 28 29 #if defined(DDR_CASLAT_20) 30 #define TIMING_CASLAT TIMING_CFG1_CASLAT_20 31 #define MODE_CASLAT DDR_MODE_CASLAT_20 32 #else 33 #define TIMING_CASLAT TIMING_CFG1_CASLAT_25 34 #define MODE_CASLAT DDR_MODE_CASLAT_25 35 #endif 36 37 #define INITIAL_CS_CONFIG (CSCONFIG_EN | CSCONFIG_ROW_BIT_12 | \ 38 CSCONFIG_COL_BIT_9) 39 40 /* External definitions */ 41 ulong flash_get_size (ulong base, int banknum); 42 43 /* Local functions */ 44 static int detect_num_flash_banks(void); 45 static long int get_ddr_bank_size(short cs, long *base); 46 static void set_cs_bounds(short cs, long base, long size); 47 static void set_cs_config(short cs, long config); 48 static void set_ddr_config(void); 49 50 /* Local variable */ 51 static volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; 52 53 /************************************************************************** 54 * Board initialzation after relocation to RAM. Used to detect the number 55 * of Flash banks on TQM834x. 56 */ 57 int board_early_init_r (void) { 58 /* sanity check, IMMARBAR should be mirrored at offset zero of IMMR */ 59 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im) 60 return 0; 61 62 /* detect the number of Flash banks */ 63 return detect_num_flash_banks(); 64 } 65 66 /************************************************************************** 67 * DRAM initalization and size detection 68 */ 69 phys_size_t initdram (int board_type) 70 { 71 long bank_size; 72 long size; 73 int cs; 74 75 /* during size detection, set up the max DDRLAW size */ 76 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_BASE; 77 im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G); 78 79 /* set CS bounds to maximum size */ 80 for(cs = 0; cs < 4; ++cs) { 81 set_cs_bounds(cs, 82 CONFIG_SYS_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS), 83 DDR_MAX_SIZE_PER_CS); 84 85 set_cs_config(cs, INITIAL_CS_CONFIG); 86 } 87 88 /* configure ddr controller */ 89 set_ddr_config(); 90 91 udelay(200); 92 93 /* enable DDR controller */ 94 im->ddr.sdram_cfg = (SDRAM_CFG_MEM_EN | 95 SDRAM_CFG_SREN | 96 SDRAM_CFG_SDRAM_TYPE_DDR1); 97 SYNC; 98 99 /* size detection */ 100 debug("\n"); 101 size = 0; 102 for(cs = 0; cs < 4; ++cs) { 103 debug("\nDetecting Bank%d\n", cs); 104 105 bank_size = get_ddr_bank_size(cs, 106 (long *)(CONFIG_SYS_DDR_BASE + size)); 107 size += bank_size; 108 109 debug("DDR Bank%d size: %ld MiB\n\n", cs, bank_size >> 20); 110 111 /* exit if less than one bank */ 112 if(size < DDR_MAX_SIZE_PER_CS) break; 113 } 114 115 return size; 116 } 117 118 /************************************************************************** 119 * checkboard() 120 */ 121 int checkboard (void) 122 { 123 puts("Board: TQM834x\n"); 124 125 #ifdef CONFIG_PCI 126 volatile immap_t * immr; 127 u32 w, f; 128 129 immr = (immap_t *)CONFIG_SYS_IMMR; 130 if (!(immr->reset.rcwh & HRCWH_PCI_HOST)) { 131 printf("PCI: NOT in host mode..?!\n"); 132 return 0; 133 } 134 135 /* get bus width */ 136 w = 32; 137 if (immr->reset.rcwh & HRCWH_64_BIT_PCI) 138 w = 64; 139 140 /* get clock */ 141 f = gd->pci_clk; 142 143 printf("PCI1: %d bit, %d MHz\n", w, f / 1000000); 144 #else 145 printf("PCI: disabled\n"); 146 #endif 147 return 0; 148 } 149 150 151 /************************************************************************** 152 * 153 * Local functions 154 * 155 *************************************************************************/ 156 157 /************************************************************************** 158 * Detect the number of flash banks (1 or 2). Store it in 159 * a global variable tqm834x_num_flash_banks. 160 * Bank detection code based on the Monitor code. 161 */ 162 static int detect_num_flash_banks(void) 163 { 164 typedef unsigned long FLASH_PORT_WIDTH; 165 typedef volatile unsigned long FLASH_PORT_WIDTHV; 166 FPWV *bank1_base; 167 FPWV *bank2_base; 168 FPW bank1_read; 169 FPW bank2_read; 170 ulong bank1_size; 171 ulong bank2_size; 172 ulong total_size; 173 174 cfi_flash_num_flash_banks = 2; /* assume two banks */ 175 176 /* Get bank 1 and 2 information */ 177 bank1_size = flash_get_size(CONFIG_SYS_FLASH_BASE, 0); 178 debug("Bank1 size: %lu\n", bank1_size); 179 bank2_size = flash_get_size(CONFIG_SYS_FLASH_BASE + bank1_size, 1); 180 debug("Bank2 size: %lu\n", bank2_size); 181 total_size = bank1_size + bank2_size; 182 183 if (bank2_size > 0) { 184 /* Seems like we've got bank 2, but maybe it's mirrored 1 */ 185 186 /* Set the base addresses */ 187 bank1_base = (FPWV *) (CONFIG_SYS_FLASH_BASE); 188 bank2_base = (FPWV *) (CONFIG_SYS_FLASH_BASE + bank1_size); 189 190 /* Put bank 2 into CFI command mode and read */ 191 bank2_base[0x55] = 0x00980098; 192 IOSYNC; 193 ISYNC; 194 bank2_read = bank2_base[0x10]; 195 196 /* Read from bank 1 (it's in read mode) */ 197 bank1_read = bank1_base[0x10]; 198 199 /* Reset Flash */ 200 bank1_base[0] = 0x00F000F0; 201 bank2_base[0] = 0x00F000F0; 202 203 if (bank2_read == bank1_read) { 204 /* 205 * Looks like just one bank, but not sure yet. Let's 206 * read from bank 2 in autosoelect mode. 207 */ 208 bank2_base[0x0555] = 0x00AA00AA; 209 bank2_base[0x02AA] = 0x00550055; 210 bank2_base[0x0555] = 0x00900090; 211 IOSYNC; 212 ISYNC; 213 bank2_read = bank2_base[0x10]; 214 215 /* Read from bank 1 (it's in read mode) */ 216 bank1_read = bank1_base[0x10]; 217 218 /* Reset Flash */ 219 bank1_base[0] = 0x00F000F0; 220 bank2_base[0] = 0x00F000F0; 221 222 if (bank2_read == bank1_read) { 223 /* 224 * In both CFI command and autoselect modes, 225 * we got the some data reading from Flash. 226 * There is only one mirrored bank. 227 */ 228 cfi_flash_num_flash_banks = 1; 229 total_size = bank1_size; 230 } 231 } 232 } 233 234 debug("Number of flash banks detected: %d\n", cfi_flash_num_flash_banks); 235 236 /* set OR0 and BR0 */ 237 set_lbc_or(0, CONFIG_SYS_OR_TIMING_FLASH | 238 (-(total_size) & OR_GPCM_AM)); 239 set_lbc_br(0, (CONFIG_SYS_FLASH_BASE & BR_BA) | 240 (BR_MS_GPCM | BR_PS_32 | BR_V)); 241 242 return (0); 243 } 244 245 /************************************************************************* 246 * Detect the size of a ddr bank. Sets CS bounds and CS config accordingly. 247 */ 248 static long int get_ddr_bank_size(short cs, long *base) 249 { 250 /* This array lists all valid DDR SDRAM configurations, with 251 * Bank sizes in bytes. (Refer to Table 9-27 in the MPC8349E RM). 252 * The last entry has to to have size equal 0 and is igonred during 253 * autodection. Bank sizes must be in increasing order of size 254 */ 255 struct { 256 long row; 257 long col; 258 long size; 259 } conf[] = { 260 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_8, 32 << 20}, 261 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_9, 64 << 20}, 262 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_10, 128 << 20}, 263 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_9, 128 << 20}, 264 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_10, 256 << 20}, 265 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_11, 512 << 20}, 266 {CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_10, 512 << 20}, 267 {CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_11, 1024 << 20}, 268 {0, 0, 0} 269 }; 270 271 int i; 272 int detected; 273 long size; 274 275 detected = -1; 276 for(i = 0; conf[i].size != 0; ++i) { 277 278 /* set sdram bank configuration */ 279 set_cs_config(cs, CSCONFIG_EN | conf[i].col | conf[i].row); 280 281 debug("Getting RAM size...\n"); 282 size = get_ram_size(base, DDR_MAX_SIZE_PER_CS); 283 284 if((size == conf[i].size) && (i == detected + 1)) 285 detected = i; 286 287 debug("Trying %ld x %ld (%ld MiB) at addr %p, detected: %ld MiB\n", 288 conf[i].row, 289 conf[i].col, 290 conf[i].size >> 20, 291 base, 292 size >> 20); 293 } 294 295 if(detected == -1){ 296 /* disable empty cs */ 297 debug("\nNo valid configurations for CS%d, disabling...\n", cs); 298 set_cs_config(cs, 0); 299 return 0; 300 } 301 302 debug("\nDetected configuration %ld x %ld (%ld MiB) at addr %p\n", 303 conf[detected].row, conf[detected].col, conf[detected].size >> 20, base); 304 305 /* configure cs ro detected params */ 306 set_cs_config(cs, CSCONFIG_EN | conf[detected].row | 307 conf[detected].col); 308 309 set_cs_bounds(cs, (long)base, conf[detected].size); 310 311 return(conf[detected].size); 312 } 313 314 /************************************************************************** 315 * Sets DDR bank CS bounds. 316 */ 317 static void set_cs_bounds(short cs, long base, long size) 318 { 319 debug("Setting bounds %08lx, %08lx for cs %d\n", base, size, cs); 320 if(size == 0){ 321 im->ddr.csbnds[cs].csbnds = 0x00000000; 322 } else { 323 im->ddr.csbnds[cs].csbnds = 324 ((base >> CSBNDS_SA_SHIFT) & CSBNDS_SA) | 325 (((base + size - 1) >> CSBNDS_EA_SHIFT) & 326 CSBNDS_EA); 327 } 328 SYNC; 329 } 330 331 /************************************************************************** 332 * Sets DDR banks CS configuration. 333 * config == 0x00000000 disables the CS. 334 */ 335 static void set_cs_config(short cs, long config) 336 { 337 debug("Setting config %08lx for cs %d\n", config, cs); 338 im->ddr.cs_config[cs] = config; 339 SYNC; 340 } 341 342 /************************************************************************** 343 * Sets DDR clocks, timings and configuration. 344 */ 345 static void set_ddr_config(void) { 346 /* clock control */ 347 im->ddr.sdram_clk_cntl = DDR_SDRAM_CLK_CNTL_SS_EN | 348 DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05; 349 SYNC; 350 351 /* timing configuration */ 352 im->ddr.timing_cfg_1 = 353 (4 << TIMING_CFG1_PRETOACT_SHIFT) | 354 (7 << TIMING_CFG1_ACTTOPRE_SHIFT) | 355 (4 << TIMING_CFG1_ACTTORW_SHIFT) | 356 (5 << TIMING_CFG1_REFREC_SHIFT) | 357 (3 << TIMING_CFG1_WRREC_SHIFT) | 358 (3 << TIMING_CFG1_ACTTOACT_SHIFT) | 359 (1 << TIMING_CFG1_WRTORD_SHIFT) | 360 (TIMING_CFG1_CASLAT & TIMING_CASLAT); 361 362 im->ddr.timing_cfg_2 = 363 TIMING_CFG2_CPO_DEF | 364 (2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT); 365 SYNC; 366 367 /* don't enable DDR controller yet */ 368 im->ddr.sdram_cfg = 369 SDRAM_CFG_SREN | 370 SDRAM_CFG_SDRAM_TYPE_DDR1; 371 SYNC; 372 373 /* Set SDRAM mode */ 374 im->ddr.sdram_mode = 375 ((DDR_MODE_EXT_MODEREG | DDR_MODE_WEAK) << 376 SDRAM_MODE_ESD_SHIFT) | 377 ((DDR_MODE_MODEREG | DDR_MODE_BLEN_4) << 378 SDRAM_MODE_SD_SHIFT) | 379 ((DDR_MODE_CASLAT << SDRAM_MODE_SD_SHIFT) & 380 MODE_CASLAT); 381 SYNC; 382 383 /* Set fast SDRAM refresh rate */ 384 im->ddr.sdram_interval = 385 (DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) | 386 (DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT); 387 SYNC; 388 389 /* Workaround for DDR6 Erratum 390 * see MPC8349E Device Errata Rev.8, 2/2006 391 * This workaround influences the MPC internal "input enables" 392 * dependent on CAS latency and MPC revision. According to errata 393 * sheet the internal reserved registers for this workaround are 394 * not available from revision 2.0 and up. 395 */ 396 397 /* Get REVID from register SPRIDR. Skip workaround if rev >= 2.0 398 * (0x200) 399 */ 400 if ((im->sysconf.spridr & SPRIDR_REVID) < 0x200) { 401 402 /* There is a internal reserved register at IMMRBAR+0x2F00 403 * which has to be written with a certain value defined by 404 * errata sheet. 405 */ 406 u32 *reserved_p = (u32 *)((u8 *)im + 0x2f00); 407 408 #if defined(DDR_CASLAT_20) 409 *reserved_p = 0x201c0000; 410 #else 411 *reserved_p = 0x202c0000; 412 #endif 413 } 414 } 415 416 #ifdef CONFIG_OF_BOARD_SETUP 417 int ft_board_setup(void *blob, bd_t *bd) 418 { 419 ft_cpu_setup(blob, bd); 420 421 #ifdef CONFIG_PCI 422 ft_pci_setup(blob, bd); 423 #endif /* CONFIG_PCI */ 424 425 return 0; 426 } 427 #endif /* CONFIG_OF_BOARD_SETUP */ 428