1 /* chmc.c: Driver for UltraSPARC-III memory controller. 2 * 3 * Copyright (C) 2001, 2007, 2008 David S. Miller (davem@davemloft.net) 4 */ 5 6 #include <linux/module.h> 7 #include <linux/kernel.h> 8 #include <linux/types.h> 9 #include <linux/slab.h> 10 #include <linux/list.h> 11 #include <linux/string.h> 12 #include <linux/sched.h> 13 #include <linux/smp.h> 14 #include <linux/errno.h> 15 #include <linux/init.h> 16 #include <linux/of.h> 17 #include <linux/of_device.h> 18 #include <asm/spitfire.h> 19 #include <asm/chmctrl.h> 20 #include <asm/cpudata.h> 21 #include <asm/oplib.h> 22 #include <asm/prom.h> 23 #include <asm/head.h> 24 #include <asm/io.h> 25 #include <asm/memctrl.h> 26 27 #define DRV_MODULE_NAME "chmc" 28 #define PFX DRV_MODULE_NAME ": " 29 #define DRV_MODULE_VERSION "0.2" 30 31 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); 32 MODULE_DESCRIPTION("UltraSPARC-III memory controller driver"); 33 MODULE_LICENSE("GPL"); 34 MODULE_VERSION(DRV_MODULE_VERSION); 35 36 static int mc_type; 37 #define MC_TYPE_SAFARI 1 38 #define MC_TYPE_JBUS 2 39 40 static dimm_printer_t us3mc_dimm_printer; 41 42 #define CHMCTRL_NDGRPS 2 43 #define CHMCTRL_NDIMMS 4 44 45 #define CHMC_DIMMS_PER_MC (CHMCTRL_NDGRPS * CHMCTRL_NDIMMS) 46 47 /* OBP memory-layout property format. */ 48 struct chmc_obp_map { 49 unsigned char dimm_map[144]; 50 unsigned char pin_map[576]; 51 }; 52 53 #define DIMM_LABEL_SZ 8 54 55 struct chmc_obp_mem_layout { 56 /* One max 8-byte string label per DIMM. Usually 57 * this matches the label on the motherboard where 58 * that DIMM resides. 59 */ 60 char dimm_labels[CHMC_DIMMS_PER_MC][DIMM_LABEL_SZ]; 61 62 /* If symmetric use map[0], else it is 63 * asymmetric and map[1] should be used. 64 */ 65 char symmetric; 66 67 struct chmc_obp_map map[2]; 68 }; 69 70 #define CHMCTRL_NBANKS 4 71 72 struct chmc_bank_info { 73 struct chmc *p; 74 int bank_id; 75 76 u64 raw_reg; 77 int valid; 78 int uk; 79 int um; 80 int lk; 81 int lm; 82 int interleave; 83 unsigned long base; 84 unsigned long size; 85 }; 86 87 struct chmc { 88 struct list_head list; 89 int portid; 90 91 struct chmc_obp_mem_layout layout_prop; 92 int layout_size; 93 94 void __iomem *regs; 95 96 u64 timing_control1; 97 u64 timing_control2; 98 u64 timing_control3; 99 u64 timing_control4; 100 u64 memaddr_control; 101 102 struct chmc_bank_info logical_banks[CHMCTRL_NBANKS]; 103 }; 104 105 #define JBUSMC_REGS_SIZE 8 106 107 #define JB_MC_REG1_DIMM2_BANK3 0x8000000000000000UL 108 #define JB_MC_REG1_DIMM1_BANK1 0x4000000000000000UL 109 #define JB_MC_REG1_DIMM2_BANK2 0x2000000000000000UL 110 #define JB_MC_REG1_DIMM1_BANK0 0x1000000000000000UL 111 #define JB_MC_REG1_XOR 0x0000010000000000UL 112 #define JB_MC_REG1_ADDR_GEN_2 0x000000e000000000UL 113 #define JB_MC_REG1_ADDR_GEN_2_SHIFT 37 114 #define JB_MC_REG1_ADDR_GEN_1 0x0000001c00000000UL 115 #define JB_MC_REG1_ADDR_GEN_1_SHIFT 34 116 #define JB_MC_REG1_INTERLEAVE 0x0000000001800000UL 117 #define JB_MC_REG1_INTERLEAVE_SHIFT 23 118 #define JB_MC_REG1_DIMM2_PTYPE 0x0000000000200000UL 119 #define JB_MC_REG1_DIMM2_PTYPE_SHIFT 21 120 #define JB_MC_REG1_DIMM1_PTYPE 0x0000000000100000UL 121 #define JB_MC_REG1_DIMM1_PTYPE_SHIFT 20 122 123 #define PART_TYPE_X8 0 124 #define PART_TYPE_X4 1 125 126 #define INTERLEAVE_NONE 0 127 #define INTERLEAVE_SAME 1 128 #define INTERLEAVE_INTERNAL 2 129 #define INTERLEAVE_BOTH 3 130 131 #define ADDR_GEN_128MB 0 132 #define ADDR_GEN_256MB 1 133 #define ADDR_GEN_512MB 2 134 #define ADDR_GEN_1GB 3 135 136 #define JB_NUM_DIMM_GROUPS 2 137 #define JB_NUM_DIMMS_PER_GROUP 2 138 #define JB_NUM_DIMMS (JB_NUM_DIMM_GROUPS * JB_NUM_DIMMS_PER_GROUP) 139 140 struct jbusmc_obp_map { 141 unsigned char dimm_map[18]; 142 unsigned char pin_map[144]; 143 }; 144 145 struct jbusmc_obp_mem_layout { 146 /* One max 8-byte string label per DIMM. Usually 147 * this matches the label on the motherboard where 148 * that DIMM resides. 149 */ 150 char dimm_labels[JB_NUM_DIMMS][DIMM_LABEL_SZ]; 151 152 /* If symmetric use map[0], else it is 153 * asymmetric and map[1] should be used. 154 */ 155 char symmetric; 156 157 struct jbusmc_obp_map map; 158 159 char _pad; 160 }; 161 162 struct jbusmc_dimm_group { 163 struct jbusmc *controller; 164 int index; 165 u64 base_addr; 166 u64 size; 167 }; 168 169 struct jbusmc { 170 void __iomem *regs; 171 u64 mc_reg_1; 172 u32 portid; 173 struct jbusmc_obp_mem_layout layout; 174 int layout_len; 175 int num_dimm_groups; 176 struct jbusmc_dimm_group dimm_groups[JB_NUM_DIMM_GROUPS]; 177 struct list_head list; 178 }; 179 180 static DEFINE_SPINLOCK(mctrl_list_lock); 181 static LIST_HEAD(mctrl_list); 182 183 static void mc_list_add(struct list_head *list) 184 { 185 spin_lock(&mctrl_list_lock); 186 list_add(list, &mctrl_list); 187 spin_unlock(&mctrl_list_lock); 188 } 189 190 static void mc_list_del(struct list_head *list) 191 { 192 spin_lock(&mctrl_list_lock); 193 list_del_init(list); 194 spin_unlock(&mctrl_list_lock); 195 } 196 197 #define SYNDROME_MIN -1 198 #define SYNDROME_MAX 144 199 200 /* Covert syndrome code into the way the bits are positioned 201 * on the bus. 202 */ 203 static int syndrome_to_qword_code(int syndrome_code) 204 { 205 if (syndrome_code < 128) 206 syndrome_code += 16; 207 else if (syndrome_code < 128 + 9) 208 syndrome_code -= (128 - 7); 209 else if (syndrome_code < (128 + 9 + 3)) 210 syndrome_code -= (128 + 9 - 4); 211 else 212 syndrome_code -= (128 + 9 + 3); 213 return syndrome_code; 214 } 215 216 /* All this magic has to do with how a cache line comes over the wire 217 * on Safari and JBUS. A 64-bit line comes over in 1 or more quadword 218 * cycles, each of which transmit ECC/MTAG info as well as the actual 219 * data. 220 */ 221 #define L2_LINE_SIZE 64 222 #define L2_LINE_ADDR_MSK (L2_LINE_SIZE - 1) 223 #define QW_PER_LINE 4 224 #define QW_BYTES (L2_LINE_SIZE / QW_PER_LINE) 225 #define QW_BITS 144 226 #define SAFARI_LAST_BIT (576 - 1) 227 #define JBUS_LAST_BIT (144 - 1) 228 229 static void get_pin_and_dimm_str(int syndrome_code, unsigned long paddr, 230 int *pin_p, char **dimm_str_p, void *_prop, 231 int base_dimm_offset) 232 { 233 int qword_code = syndrome_to_qword_code(syndrome_code); 234 int cache_line_offset; 235 int offset_inverse; 236 int dimm_map_index; 237 int map_val; 238 239 if (mc_type == MC_TYPE_JBUS) { 240 struct jbusmc_obp_mem_layout *p = _prop; 241 242 /* JBUS */ 243 cache_line_offset = qword_code; 244 offset_inverse = (JBUS_LAST_BIT - cache_line_offset); 245 dimm_map_index = offset_inverse / 8; 246 map_val = p->map.dimm_map[dimm_map_index]; 247 map_val = ((map_val >> ((7 - (offset_inverse & 7)))) & 1); 248 *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val]; 249 *pin_p = p->map.pin_map[cache_line_offset]; 250 } else { 251 struct chmc_obp_mem_layout *p = _prop; 252 struct chmc_obp_map *mp; 253 int qword; 254 255 /* Safari */ 256 if (p->symmetric) 257 mp = &p->map[0]; 258 else 259 mp = &p->map[1]; 260 261 qword = (paddr & L2_LINE_ADDR_MSK) / QW_BYTES; 262 cache_line_offset = ((3 - qword) * QW_BITS) + qword_code; 263 offset_inverse = (SAFARI_LAST_BIT - cache_line_offset); 264 dimm_map_index = offset_inverse >> 2; 265 map_val = mp->dimm_map[dimm_map_index]; 266 map_val = ((map_val >> ((3 - (offset_inverse & 3)) << 1)) & 0x3); 267 *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val]; 268 *pin_p = mp->pin_map[cache_line_offset]; 269 } 270 } 271 272 static struct jbusmc_dimm_group *jbusmc_find_dimm_group(unsigned long phys_addr) 273 { 274 struct jbusmc *p; 275 276 list_for_each_entry(p, &mctrl_list, list) { 277 int i; 278 279 for (i = 0; i < p->num_dimm_groups; i++) { 280 struct jbusmc_dimm_group *dp = &p->dimm_groups[i]; 281 282 if (phys_addr < dp->base_addr || 283 (dp->base_addr + dp->size) <= phys_addr) 284 continue; 285 286 return dp; 287 } 288 } 289 return NULL; 290 } 291 292 static int jbusmc_print_dimm(int syndrome_code, 293 unsigned long phys_addr, 294 char *buf, int buflen) 295 { 296 struct jbusmc_obp_mem_layout *prop; 297 struct jbusmc_dimm_group *dp; 298 struct jbusmc *p; 299 int first_dimm; 300 301 dp = jbusmc_find_dimm_group(phys_addr); 302 if (dp == NULL || 303 syndrome_code < SYNDROME_MIN || 304 syndrome_code > SYNDROME_MAX) { 305 buf[0] = '?'; 306 buf[1] = '?'; 307 buf[2] = '?'; 308 buf[3] = '\0'; 309 return 0; 310 } 311 p = dp->controller; 312 prop = &p->layout; 313 314 first_dimm = dp->index * JB_NUM_DIMMS_PER_GROUP; 315 316 if (syndrome_code != SYNDROME_MIN) { 317 char *dimm_str; 318 int pin; 319 320 get_pin_and_dimm_str(syndrome_code, phys_addr, &pin, 321 &dimm_str, prop, first_dimm); 322 sprintf(buf, "%s, pin %3d", dimm_str, pin); 323 } else { 324 int dimm; 325 326 /* Multi-bit error, we just dump out all the 327 * dimm labels associated with this dimm group. 328 */ 329 for (dimm = 0; dimm < JB_NUM_DIMMS_PER_GROUP; dimm++) { 330 sprintf(buf, "%s ", 331 prop->dimm_labels[first_dimm + dimm]); 332 buf += strlen(buf); 333 } 334 } 335 336 return 0; 337 } 338 339 static u64 jbusmc_dimm_group_size(u64 base, 340 const struct linux_prom64_registers *mem_regs, 341 int num_mem_regs) 342 { 343 u64 max = base + (8UL * 1024 * 1024 * 1024); 344 u64 max_seen = base; 345 int i; 346 347 for (i = 0; i < num_mem_regs; i++) { 348 const struct linux_prom64_registers *ent; 349 u64 this_base; 350 u64 this_end; 351 352 ent = &mem_regs[i]; 353 this_base = ent->phys_addr; 354 this_end = this_base + ent->reg_size; 355 if (base < this_base || base >= this_end) 356 continue; 357 if (this_end > max) 358 this_end = max; 359 if (this_end > max_seen) 360 max_seen = this_end; 361 } 362 363 return max_seen - base; 364 } 365 366 static void jbusmc_construct_one_dimm_group(struct jbusmc *p, 367 unsigned long index, 368 const struct linux_prom64_registers *mem_regs, 369 int num_mem_regs) 370 { 371 struct jbusmc_dimm_group *dp = &p->dimm_groups[index]; 372 373 dp->controller = p; 374 dp->index = index; 375 376 dp->base_addr = (p->portid * (64UL * 1024 * 1024 * 1024)); 377 dp->base_addr += (index * (8UL * 1024 * 1024 * 1024)); 378 dp->size = jbusmc_dimm_group_size(dp->base_addr, mem_regs, num_mem_regs); 379 } 380 381 static void jbusmc_construct_dimm_groups(struct jbusmc *p, 382 const struct linux_prom64_registers *mem_regs, 383 int num_mem_regs) 384 { 385 if (p->mc_reg_1 & JB_MC_REG1_DIMM1_BANK0) { 386 jbusmc_construct_one_dimm_group(p, 0, mem_regs, num_mem_regs); 387 p->num_dimm_groups++; 388 } 389 if (p->mc_reg_1 & JB_MC_REG1_DIMM2_BANK2) { 390 jbusmc_construct_one_dimm_group(p, 1, mem_regs, num_mem_regs); 391 p->num_dimm_groups++; 392 } 393 } 394 395 static int jbusmc_probe(struct platform_device *op) 396 { 397 const struct linux_prom64_registers *mem_regs; 398 struct device_node *mem_node; 399 int err, len, num_mem_regs; 400 struct jbusmc *p; 401 const u32 *prop; 402 const void *ml; 403 404 err = -ENODEV; 405 mem_node = of_find_node_by_path("/memory"); 406 if (!mem_node) { 407 printk(KERN_ERR PFX "Cannot find /memory node.\n"); 408 goto out; 409 } 410 mem_regs = of_get_property(mem_node, "reg", &len); 411 if (!mem_regs) { 412 printk(KERN_ERR PFX "Cannot get reg property of /memory node.\n"); 413 goto out; 414 } 415 num_mem_regs = len / sizeof(*mem_regs); 416 417 err = -ENOMEM; 418 p = kzalloc(sizeof(*p), GFP_KERNEL); 419 if (!p) { 420 printk(KERN_ERR PFX "Cannot allocate struct jbusmc.\n"); 421 goto out; 422 } 423 424 INIT_LIST_HEAD(&p->list); 425 426 err = -ENODEV; 427 prop = of_get_property(op->dev.of_node, "portid", &len); 428 if (!prop || len != 4) { 429 printk(KERN_ERR PFX "Cannot find portid.\n"); 430 goto out_free; 431 } 432 433 p->portid = *prop; 434 435 prop = of_get_property(op->dev.of_node, "memory-control-register-1", &len); 436 if (!prop || len != 8) { 437 printk(KERN_ERR PFX "Cannot get memory control register 1.\n"); 438 goto out_free; 439 } 440 441 p->mc_reg_1 = ((u64)prop[0] << 32) | (u64) prop[1]; 442 443 err = -ENOMEM; 444 p->regs = of_ioremap(&op->resource[0], 0, JBUSMC_REGS_SIZE, "jbusmc"); 445 if (!p->regs) { 446 printk(KERN_ERR PFX "Cannot map jbusmc regs.\n"); 447 goto out_free; 448 } 449 450 err = -ENODEV; 451 ml = of_get_property(op->dev.of_node, "memory-layout", &p->layout_len); 452 if (!ml) { 453 printk(KERN_ERR PFX "Cannot get memory layout property.\n"); 454 goto out_iounmap; 455 } 456 if (p->layout_len > sizeof(p->layout)) { 457 printk(KERN_ERR PFX "Unexpected memory-layout size %d\n", 458 p->layout_len); 459 goto out_iounmap; 460 } 461 memcpy(&p->layout, ml, p->layout_len); 462 463 jbusmc_construct_dimm_groups(p, mem_regs, num_mem_regs); 464 465 mc_list_add(&p->list); 466 467 printk(KERN_INFO PFX "UltraSPARC-IIIi memory controller at %s\n", 468 op->dev.of_node->full_name); 469 470 dev_set_drvdata(&op->dev, p); 471 472 err = 0; 473 474 out: 475 return err; 476 477 out_iounmap: 478 of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE); 479 480 out_free: 481 kfree(p); 482 goto out; 483 } 484 485 /* Does BANK decode PHYS_ADDR? */ 486 static int chmc_bank_match(struct chmc_bank_info *bp, unsigned long phys_addr) 487 { 488 unsigned long upper_bits = (phys_addr & PA_UPPER_BITS) >> PA_UPPER_BITS_SHIFT; 489 unsigned long lower_bits = (phys_addr & PA_LOWER_BITS) >> PA_LOWER_BITS_SHIFT; 490 491 /* Bank must be enabled to match. */ 492 if (bp->valid == 0) 493 return 0; 494 495 /* Would BANK match upper bits? */ 496 upper_bits ^= bp->um; /* What bits are different? */ 497 upper_bits = ~upper_bits; /* Invert. */ 498 upper_bits |= bp->uk; /* What bits don't matter for matching? */ 499 upper_bits = ~upper_bits; /* Invert. */ 500 501 if (upper_bits) 502 return 0; 503 504 /* Would BANK match lower bits? */ 505 lower_bits ^= bp->lm; /* What bits are different? */ 506 lower_bits = ~lower_bits; /* Invert. */ 507 lower_bits |= bp->lk; /* What bits don't matter for matching? */ 508 lower_bits = ~lower_bits; /* Invert. */ 509 510 if (lower_bits) 511 return 0; 512 513 /* I always knew you'd be the one. */ 514 return 1; 515 } 516 517 /* Given PHYS_ADDR, search memory controller banks for a match. */ 518 static struct chmc_bank_info *chmc_find_bank(unsigned long phys_addr) 519 { 520 struct chmc *p; 521 522 list_for_each_entry(p, &mctrl_list, list) { 523 int bank_no; 524 525 for (bank_no = 0; bank_no < CHMCTRL_NBANKS; bank_no++) { 526 struct chmc_bank_info *bp; 527 528 bp = &p->logical_banks[bank_no]; 529 if (chmc_bank_match(bp, phys_addr)) 530 return bp; 531 } 532 } 533 534 return NULL; 535 } 536 537 /* This is the main purpose of this driver. */ 538 static int chmc_print_dimm(int syndrome_code, 539 unsigned long phys_addr, 540 char *buf, int buflen) 541 { 542 struct chmc_bank_info *bp; 543 struct chmc_obp_mem_layout *prop; 544 int bank_in_controller, first_dimm; 545 546 bp = chmc_find_bank(phys_addr); 547 if (bp == NULL || 548 syndrome_code < SYNDROME_MIN || 549 syndrome_code > SYNDROME_MAX) { 550 buf[0] = '?'; 551 buf[1] = '?'; 552 buf[2] = '?'; 553 buf[3] = '\0'; 554 return 0; 555 } 556 557 prop = &bp->p->layout_prop; 558 bank_in_controller = bp->bank_id & (CHMCTRL_NBANKS - 1); 559 first_dimm = (bank_in_controller & (CHMCTRL_NDGRPS - 1)); 560 first_dimm *= CHMCTRL_NDIMMS; 561 562 if (syndrome_code != SYNDROME_MIN) { 563 char *dimm_str; 564 int pin; 565 566 get_pin_and_dimm_str(syndrome_code, phys_addr, &pin, 567 &dimm_str, prop, first_dimm); 568 sprintf(buf, "%s, pin %3d", dimm_str, pin); 569 } else { 570 int dimm; 571 572 /* Multi-bit error, we just dump out all the 573 * dimm labels associated with this bank. 574 */ 575 for (dimm = 0; dimm < CHMCTRL_NDIMMS; dimm++) { 576 sprintf(buf, "%s ", 577 prop->dimm_labels[first_dimm + dimm]); 578 buf += strlen(buf); 579 } 580 } 581 return 0; 582 } 583 584 /* Accessing the registers is slightly complicated. If you want 585 * to get at the memory controller which is on the same processor 586 * the code is executing, you must use special ASI load/store else 587 * you go through the global mapping. 588 */ 589 static u64 chmc_read_mcreg(struct chmc *p, unsigned long offset) 590 { 591 unsigned long ret, this_cpu; 592 593 preempt_disable(); 594 595 this_cpu = real_hard_smp_processor_id(); 596 597 if (p->portid == this_cpu) { 598 __asm__ __volatile__("ldxa [%1] %2, %0" 599 : "=r" (ret) 600 : "r" (offset), "i" (ASI_MCU_CTRL_REG)); 601 } else { 602 __asm__ __volatile__("ldxa [%1] %2, %0" 603 : "=r" (ret) 604 : "r" (p->regs + offset), 605 "i" (ASI_PHYS_BYPASS_EC_E)); 606 } 607 608 preempt_enable(); 609 610 return ret; 611 } 612 613 #if 0 /* currently unused */ 614 static void chmc_write_mcreg(struct chmc *p, unsigned long offset, u64 val) 615 { 616 if (p->portid == smp_processor_id()) { 617 __asm__ __volatile__("stxa %0, [%1] %2" 618 : : "r" (val), 619 "r" (offset), "i" (ASI_MCU_CTRL_REG)); 620 } else { 621 __asm__ __volatile__("ldxa %0, [%1] %2" 622 : : "r" (val), 623 "r" (p->regs + offset), 624 "i" (ASI_PHYS_BYPASS_EC_E)); 625 } 626 } 627 #endif 628 629 static void chmc_interpret_one_decode_reg(struct chmc *p, int which_bank, u64 val) 630 { 631 struct chmc_bank_info *bp = &p->logical_banks[which_bank]; 632 633 bp->p = p; 634 bp->bank_id = (CHMCTRL_NBANKS * p->portid) + which_bank; 635 bp->raw_reg = val; 636 bp->valid = (val & MEM_DECODE_VALID) >> MEM_DECODE_VALID_SHIFT; 637 bp->uk = (val & MEM_DECODE_UK) >> MEM_DECODE_UK_SHIFT; 638 bp->um = (val & MEM_DECODE_UM) >> MEM_DECODE_UM_SHIFT; 639 bp->lk = (val & MEM_DECODE_LK) >> MEM_DECODE_LK_SHIFT; 640 bp->lm = (val & MEM_DECODE_LM) >> MEM_DECODE_LM_SHIFT; 641 642 bp->base = (bp->um); 643 bp->base &= ~(bp->uk); 644 bp->base <<= PA_UPPER_BITS_SHIFT; 645 646 switch(bp->lk) { 647 case 0xf: 648 default: 649 bp->interleave = 1; 650 break; 651 652 case 0xe: 653 bp->interleave = 2; 654 break; 655 656 case 0xc: 657 bp->interleave = 4; 658 break; 659 660 case 0x8: 661 bp->interleave = 8; 662 break; 663 664 case 0x0: 665 bp->interleave = 16; 666 break; 667 } 668 669 /* UK[10] is reserved, and UK[11] is not set for the SDRAM 670 * bank size definition. 671 */ 672 bp->size = (((unsigned long)bp->uk & 673 ((1UL << 10UL) - 1UL)) + 1UL) << PA_UPPER_BITS_SHIFT; 674 bp->size /= bp->interleave; 675 } 676 677 static void chmc_fetch_decode_regs(struct chmc *p) 678 { 679 if (p->layout_size == 0) 680 return; 681 682 chmc_interpret_one_decode_reg(p, 0, 683 chmc_read_mcreg(p, CHMCTRL_DECODE1)); 684 chmc_interpret_one_decode_reg(p, 1, 685 chmc_read_mcreg(p, CHMCTRL_DECODE2)); 686 chmc_interpret_one_decode_reg(p, 2, 687 chmc_read_mcreg(p, CHMCTRL_DECODE3)); 688 chmc_interpret_one_decode_reg(p, 3, 689 chmc_read_mcreg(p, CHMCTRL_DECODE4)); 690 } 691 692 static int chmc_probe(struct platform_device *op) 693 { 694 struct device_node *dp = op->dev.of_node; 695 unsigned long ver; 696 const void *pval; 697 int len, portid; 698 struct chmc *p; 699 int err; 700 701 err = -ENODEV; 702 __asm__ ("rdpr %%ver, %0" : "=r" (ver)); 703 if ((ver >> 32UL) == __JALAPENO_ID || 704 (ver >> 32UL) == __SERRANO_ID) 705 goto out; 706 707 portid = of_getintprop_default(dp, "portid", -1); 708 if (portid == -1) 709 goto out; 710 711 pval = of_get_property(dp, "memory-layout", &len); 712 if (pval && len > sizeof(p->layout_prop)) { 713 printk(KERN_ERR PFX "Unexpected memory-layout property " 714 "size %d.\n", len); 715 goto out; 716 } 717 718 err = -ENOMEM; 719 p = kzalloc(sizeof(*p), GFP_KERNEL); 720 if (!p) { 721 printk(KERN_ERR PFX "Could not allocate struct chmc.\n"); 722 goto out; 723 } 724 725 p->portid = portid; 726 p->layout_size = len; 727 if (!pval) 728 p->layout_size = 0; 729 else 730 memcpy(&p->layout_prop, pval, len); 731 732 p->regs = of_ioremap(&op->resource[0], 0, 0x48, "chmc"); 733 if (!p->regs) { 734 printk(KERN_ERR PFX "Could not map registers.\n"); 735 goto out_free; 736 } 737 738 if (p->layout_size != 0UL) { 739 p->timing_control1 = chmc_read_mcreg(p, CHMCTRL_TCTRL1); 740 p->timing_control2 = chmc_read_mcreg(p, CHMCTRL_TCTRL2); 741 p->timing_control3 = chmc_read_mcreg(p, CHMCTRL_TCTRL3); 742 p->timing_control4 = chmc_read_mcreg(p, CHMCTRL_TCTRL4); 743 p->memaddr_control = chmc_read_mcreg(p, CHMCTRL_MACTRL); 744 } 745 746 chmc_fetch_decode_regs(p); 747 748 mc_list_add(&p->list); 749 750 printk(KERN_INFO PFX "UltraSPARC-III memory controller at %s [%s]\n", 751 dp->full_name, 752 (p->layout_size ? "ACTIVE" : "INACTIVE")); 753 754 dev_set_drvdata(&op->dev, p); 755 756 err = 0; 757 758 out: 759 return err; 760 761 out_free: 762 kfree(p); 763 goto out; 764 } 765 766 static int us3mc_probe(struct platform_device *op) 767 { 768 if (mc_type == MC_TYPE_SAFARI) 769 return chmc_probe(op); 770 else if (mc_type == MC_TYPE_JBUS) 771 return jbusmc_probe(op); 772 return -ENODEV; 773 } 774 775 static void chmc_destroy(struct platform_device *op, struct chmc *p) 776 { 777 list_del(&p->list); 778 of_iounmap(&op->resource[0], p->regs, 0x48); 779 kfree(p); 780 } 781 782 static void jbusmc_destroy(struct platform_device *op, struct jbusmc *p) 783 { 784 mc_list_del(&p->list); 785 of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE); 786 kfree(p); 787 } 788 789 static int us3mc_remove(struct platform_device *op) 790 { 791 void *p = dev_get_drvdata(&op->dev); 792 793 if (p) { 794 if (mc_type == MC_TYPE_SAFARI) 795 chmc_destroy(op, p); 796 else if (mc_type == MC_TYPE_JBUS) 797 jbusmc_destroy(op, p); 798 } 799 return 0; 800 } 801 802 static const struct of_device_id us3mc_match[] = { 803 { 804 .name = "memory-controller", 805 }, 806 {}, 807 }; 808 MODULE_DEVICE_TABLE(of, us3mc_match); 809 810 static struct platform_driver us3mc_driver = { 811 .driver = { 812 .name = "us3mc", 813 .of_match_table = us3mc_match, 814 }, 815 .probe = us3mc_probe, 816 .remove = us3mc_remove, 817 }; 818 819 static inline bool us3mc_platform(void) 820 { 821 if (tlb_type == cheetah || tlb_type == cheetah_plus) 822 return true; 823 return false; 824 } 825 826 static int __init us3mc_init(void) 827 { 828 unsigned long ver; 829 int ret; 830 831 if (!us3mc_platform()) 832 return -ENODEV; 833 834 __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver)); 835 if ((ver >> 32UL) == __JALAPENO_ID || 836 (ver >> 32UL) == __SERRANO_ID) { 837 mc_type = MC_TYPE_JBUS; 838 us3mc_dimm_printer = jbusmc_print_dimm; 839 } else { 840 mc_type = MC_TYPE_SAFARI; 841 us3mc_dimm_printer = chmc_print_dimm; 842 } 843 844 ret = register_dimm_printer(us3mc_dimm_printer); 845 846 if (!ret) { 847 ret = platform_driver_register(&us3mc_driver); 848 if (ret) 849 unregister_dimm_printer(us3mc_dimm_printer); 850 } 851 return ret; 852 } 853 854 static void __exit us3mc_cleanup(void) 855 { 856 if (us3mc_platform()) { 857 unregister_dimm_printer(us3mc_dimm_printer); 858 platform_driver_unregister(&us3mc_driver); 859 } 860 } 861 862 module_init(us3mc_init); 863 module_exit(us3mc_cleanup); 864