1/* 2 * Freescale MPC85xx Memory Controller kernel module 3 * 4 * Parts Copyrighted (c) 2013 by Freescale Semiconductor, Inc. 5 * 6 * Author: Dave Jiang <djiang@mvista.com> 7 * 8 * 2006-2007 (c) MontaVista Software, Inc. This file is licensed under 9 * the terms of the GNU General Public License version 2. This program 10 * is licensed "as is" without any warranty of any kind, whether express 11 * or implied. 12 * 13 */ 14#include <linux/module.h> 15#include <linux/init.h> 16#include <linux/interrupt.h> 17#include <linux/ctype.h> 18#include <linux/io.h> 19#include <linux/mod_devicetable.h> 20#include <linux/edac.h> 21#include <linux/smp.h> 22#include <linux/gfp.h> 23 24#include <linux/of_platform.h> 25#include <linux/of_device.h> 26#include "edac_module.h" 27#include "edac_core.h" 28#include "mpc85xx_edac.h" 29 30static int edac_dev_idx; 31#ifdef CONFIG_PCI 32static int edac_pci_idx; 33#endif 34static int edac_mc_idx; 35 36static u32 orig_ddr_err_disable; 37static u32 orig_ddr_err_sbe; 38 39/* 40 * PCI Err defines 41 */ 42#ifdef CONFIG_PCI 43static u32 orig_pci_err_cap_dr; 44static u32 orig_pci_err_en; 45#endif 46 47static u32 orig_l2_err_disable; 48#ifdef CONFIG_FSL_SOC_BOOKE 49static u32 orig_hid1[2]; 50#endif 51 52/************************ MC SYSFS parts ***********************************/ 53 54#define to_mci(k) container_of(k, struct mem_ctl_info, dev) 55 56static ssize_t mpc85xx_mc_inject_data_hi_show(struct device *dev, 57 struct device_attribute *mattr, 58 char *data) 59{ 60 struct mem_ctl_info *mci = to_mci(dev); 61 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 62 return sprintf(data, "0x%08x", 63 in_be32(pdata->mc_vbase + 64 MPC85XX_MC_DATA_ERR_INJECT_HI)); 65} 66 67static ssize_t mpc85xx_mc_inject_data_lo_show(struct device *dev, 68 struct device_attribute *mattr, 69 char *data) 70{ 71 struct mem_ctl_info *mci = to_mci(dev); 72 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 73 return sprintf(data, "0x%08x", 74 in_be32(pdata->mc_vbase + 75 MPC85XX_MC_DATA_ERR_INJECT_LO)); 76} 77 78static ssize_t mpc85xx_mc_inject_ctrl_show(struct device *dev, 79 struct device_attribute *mattr, 80 char *data) 81{ 82 struct mem_ctl_info *mci = to_mci(dev); 83 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 84 return sprintf(data, "0x%08x", 85 in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT)); 86} 87 88static ssize_t mpc85xx_mc_inject_data_hi_store(struct device *dev, 89 struct device_attribute *mattr, 90 const char *data, size_t count) 91{ 92 struct mem_ctl_info *mci = to_mci(dev); 93 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 94 if (isdigit(*data)) { 95 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI, 96 simple_strtoul(data, NULL, 0)); 97 return count; 98 } 99 return 0; 100} 101 102static ssize_t mpc85xx_mc_inject_data_lo_store(struct device *dev, 103 struct device_attribute *mattr, 104 const char *data, size_t count) 105{ 106 struct mem_ctl_info *mci = to_mci(dev); 107 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 108 if (isdigit(*data)) { 109 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO, 110 simple_strtoul(data, NULL, 0)); 111 return count; 112 } 113 return 0; 114} 115 116static ssize_t mpc85xx_mc_inject_ctrl_store(struct device *dev, 117 struct device_attribute *mattr, 118 const char *data, size_t count) 119{ 120 struct mem_ctl_info *mci = to_mci(dev); 121 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 122 if (isdigit(*data)) { 123 out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT, 124 simple_strtoul(data, NULL, 0)); 125 return count; 126 } 127 return 0; 128} 129 130DEVICE_ATTR(inject_data_hi, S_IRUGO | S_IWUSR, 131 mpc85xx_mc_inject_data_hi_show, mpc85xx_mc_inject_data_hi_store); 132DEVICE_ATTR(inject_data_lo, S_IRUGO | S_IWUSR, 133 mpc85xx_mc_inject_data_lo_show, mpc85xx_mc_inject_data_lo_store); 134DEVICE_ATTR(inject_ctrl, S_IRUGO | S_IWUSR, 135 mpc85xx_mc_inject_ctrl_show, mpc85xx_mc_inject_ctrl_store); 136 137static struct attribute *mpc85xx_dev_attrs[] = { 138 &dev_attr_inject_data_hi.attr, 139 &dev_attr_inject_data_lo.attr, 140 &dev_attr_inject_ctrl.attr, 141 NULL 142}; 143 144ATTRIBUTE_GROUPS(mpc85xx_dev); 145 146/**************************** PCI Err device ***************************/ 147#ifdef CONFIG_PCI 148 149static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci) 150{ 151 struct mpc85xx_pci_pdata *pdata = pci->pvt_info; 152 u32 err_detect; 153 154 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR); 155 156 /* master aborts can happen during PCI config cycles */ 157 if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) { 158 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect); 159 return; 160 } 161 162 printk(KERN_ERR "PCI error(s) detected\n"); 163 printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect); 164 165 printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n", 166 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB)); 167 printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n", 168 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR)); 169 printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n", 170 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR)); 171 printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n", 172 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL)); 173 printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n", 174 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH)); 175 176 /* clear error bits */ 177 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect); 178 179 if (err_detect & PCI_EDE_PERR_MASK) 180 edac_pci_handle_pe(pci, pci->ctl_name); 181 182 if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK) 183 edac_pci_handle_npe(pci, pci->ctl_name); 184} 185 186static void mpc85xx_pcie_check(struct edac_pci_ctl_info *pci) 187{ 188 struct mpc85xx_pci_pdata *pdata = pci->pvt_info; 189 u32 err_detect; 190 191 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR); 192 193 pr_err("PCIe error(s) detected\n"); 194 pr_err("PCIe ERR_DR register: 0x%08x\n", err_detect); 195 pr_err("PCIe ERR_CAP_STAT register: 0x%08x\n", 196 in_be32(pdata->pci_vbase + MPC85XX_PCI_GAS_TIMR)); 197 pr_err("PCIe ERR_CAP_R0 register: 0x%08x\n", 198 in_be32(pdata->pci_vbase + MPC85XX_PCIE_ERR_CAP_R0)); 199 pr_err("PCIe ERR_CAP_R1 register: 0x%08x\n", 200 in_be32(pdata->pci_vbase + MPC85XX_PCIE_ERR_CAP_R1)); 201 pr_err("PCIe ERR_CAP_R2 register: 0x%08x\n", 202 in_be32(pdata->pci_vbase + MPC85XX_PCIE_ERR_CAP_R2)); 203 pr_err("PCIe ERR_CAP_R3 register: 0x%08x\n", 204 in_be32(pdata->pci_vbase + MPC85XX_PCIE_ERR_CAP_R3)); 205 206 /* clear error bits */ 207 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect); 208} 209 210static int mpc85xx_pcie_find_capability(struct device_node *np) 211{ 212 struct pci_controller *hose; 213 214 if (!np) 215 return -EINVAL; 216 217 hose = pci_find_hose_for_OF_device(np); 218 219 return early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP); 220} 221 222static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id) 223{ 224 struct edac_pci_ctl_info *pci = dev_id; 225 struct mpc85xx_pci_pdata *pdata = pci->pvt_info; 226 u32 err_detect; 227 228 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR); 229 230 if (!err_detect) 231 return IRQ_NONE; 232 233 if (pdata->is_pcie) 234 mpc85xx_pcie_check(pci); 235 else 236 mpc85xx_pci_check(pci); 237 238 return IRQ_HANDLED; 239} 240 241int mpc85xx_pci_err_probe(struct platform_device *op) 242{ 243 struct edac_pci_ctl_info *pci; 244 struct mpc85xx_pci_pdata *pdata; 245 struct resource r; 246 int res = 0; 247 248 if (!devres_open_group(&op->dev, mpc85xx_pci_err_probe, GFP_KERNEL)) 249 return -ENOMEM; 250 251 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err"); 252 if (!pci) 253 return -ENOMEM; 254 255 /* make sure error reporting method is sane */ 256 switch (edac_op_state) { 257 case EDAC_OPSTATE_POLL: 258 case EDAC_OPSTATE_INT: 259 break; 260 default: 261 edac_op_state = EDAC_OPSTATE_INT; 262 break; 263 } 264 265 pdata = pci->pvt_info; 266 pdata->name = "mpc85xx_pci_err"; 267 pdata->irq = NO_IRQ; 268 269 if (mpc85xx_pcie_find_capability(op->dev.of_node) > 0) 270 pdata->is_pcie = true; 271 272 dev_set_drvdata(&op->dev, pci); 273 pci->dev = &op->dev; 274 pci->mod_name = EDAC_MOD_STR; 275 pci->ctl_name = pdata->name; 276 pci->dev_name = dev_name(&op->dev); 277 278 if (edac_op_state == EDAC_OPSTATE_POLL) { 279 if (pdata->is_pcie) 280 pci->edac_check = mpc85xx_pcie_check; 281 else 282 pci->edac_check = mpc85xx_pci_check; 283 } 284 285 pdata->edac_idx = edac_pci_idx++; 286 287 res = of_address_to_resource(op->dev.of_node, 0, &r); 288 if (res) { 289 printk(KERN_ERR "%s: Unable to get resource for " 290 "PCI err regs\n", __func__); 291 goto err; 292 } 293 294 /* we only need the error registers */ 295 r.start += 0xe00; 296 297 if (!devm_request_mem_region(&op->dev, r.start, resource_size(&r), 298 pdata->name)) { 299 printk(KERN_ERR "%s: Error while requesting mem region\n", 300 __func__); 301 res = -EBUSY; 302 goto err; 303 } 304 305 pdata->pci_vbase = devm_ioremap(&op->dev, r.start, resource_size(&r)); 306 if (!pdata->pci_vbase) { 307 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__); 308 res = -ENOMEM; 309 goto err; 310 } 311 312 if (pdata->is_pcie) { 313 orig_pci_err_cap_dr = 314 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR); 315 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR, ~0); 316 orig_pci_err_en = 317 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN); 318 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, 0); 319 } else { 320 orig_pci_err_cap_dr = 321 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR); 322 323 /* PCI master abort is expected during config cycles */ 324 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40); 325 326 orig_pci_err_en = 327 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN); 328 329 /* disable master abort reporting */ 330 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40); 331 } 332 333 /* clear error bits */ 334 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0); 335 336 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) { 337 edac_dbg(3, "failed edac_pci_add_device()\n"); 338 goto err; 339 } 340 341 if (edac_op_state == EDAC_OPSTATE_INT) { 342 pdata->irq = irq_of_parse_and_map(op->dev.of_node, 0); 343 res = devm_request_irq(&op->dev, pdata->irq, 344 mpc85xx_pci_isr, 345 IRQF_SHARED, 346 "[EDAC] PCI err", pci); 347 if (res < 0) { 348 printk(KERN_ERR 349 "%s: Unable to request irq %d for " 350 "MPC85xx PCI err\n", __func__, pdata->irq); 351 irq_dispose_mapping(pdata->irq); 352 res = -ENODEV; 353 goto err2; 354 } 355 356 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n", 357 pdata->irq); 358 } 359 360 if (pdata->is_pcie) { 361 /* 362 * Enable all PCIe error interrupt & error detect except invalid 363 * PEX_CONFIG_ADDR/PEX_CONFIG_DATA access interrupt generation 364 * enable bit and invalid PEX_CONFIG_ADDR/PEX_CONFIG_DATA access 365 * detection enable bit. Because PCIe bus code to initialize and 366 * configure these PCIe devices on booting will use some invalid 367 * PEX_CONFIG_ADDR/PEX_CONFIG_DATA, edac driver prints the much 368 * notice information. So disable this detect to fix ugly print. 369 */ 370 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0 371 & ~PEX_ERR_ICCAIE_EN_BIT); 372 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR, 0 373 | PEX_ERR_ICCAD_DISR_BIT); 374 } 375 376 devres_remove_group(&op->dev, mpc85xx_pci_err_probe); 377 edac_dbg(3, "success\n"); 378 printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n"); 379 380 return 0; 381 382err2: 383 edac_pci_del_device(&op->dev); 384err: 385 edac_pci_free_ctl_info(pci); 386 devres_release_group(&op->dev, mpc85xx_pci_err_probe); 387 return res; 388} 389EXPORT_SYMBOL(mpc85xx_pci_err_probe); 390 391#endif /* CONFIG_PCI */ 392 393/**************************** L2 Err device ***************************/ 394 395/************************ L2 SYSFS parts ***********************************/ 396 397static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info 398 *edac_dev, char *data) 399{ 400 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 401 return sprintf(data, "0x%08x", 402 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI)); 403} 404 405static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info 406 *edac_dev, char *data) 407{ 408 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 409 return sprintf(data, "0x%08x", 410 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO)); 411} 412 413static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info 414 *edac_dev, char *data) 415{ 416 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 417 return sprintf(data, "0x%08x", 418 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL)); 419} 420 421static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info 422 *edac_dev, const char *data, 423 size_t count) 424{ 425 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 426 if (isdigit(*data)) { 427 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI, 428 simple_strtoul(data, NULL, 0)); 429 return count; 430 } 431 return 0; 432} 433 434static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info 435 *edac_dev, const char *data, 436 size_t count) 437{ 438 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 439 if (isdigit(*data)) { 440 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO, 441 simple_strtoul(data, NULL, 0)); 442 return count; 443 } 444 return 0; 445} 446 447static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info 448 *edac_dev, const char *data, 449 size_t count) 450{ 451 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 452 if (isdigit(*data)) { 453 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL, 454 simple_strtoul(data, NULL, 0)); 455 return count; 456 } 457 return 0; 458} 459 460static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = { 461 { 462 .attr = { 463 .name = "inject_data_hi", 464 .mode = (S_IRUGO | S_IWUSR) 465 }, 466 .show = mpc85xx_l2_inject_data_hi_show, 467 .store = mpc85xx_l2_inject_data_hi_store}, 468 { 469 .attr = { 470 .name = "inject_data_lo", 471 .mode = (S_IRUGO | S_IWUSR) 472 }, 473 .show = mpc85xx_l2_inject_data_lo_show, 474 .store = mpc85xx_l2_inject_data_lo_store}, 475 { 476 .attr = { 477 .name = "inject_ctrl", 478 .mode = (S_IRUGO | S_IWUSR) 479 }, 480 .show = mpc85xx_l2_inject_ctrl_show, 481 .store = mpc85xx_l2_inject_ctrl_store}, 482 483 /* End of list */ 484 { 485 .attr = {.name = NULL} 486 } 487}; 488 489static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info 490 *edac_dev) 491{ 492 edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes; 493} 494 495/***************************** L2 ops ***********************************/ 496 497static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev) 498{ 499 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 500 u32 err_detect; 501 502 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET); 503 504 if (!(err_detect & L2_EDE_MASK)) 505 return; 506 507 printk(KERN_ERR "ECC Error in CPU L2 cache\n"); 508 printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect); 509 printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n", 510 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI)); 511 printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n", 512 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO)); 513 printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n", 514 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC)); 515 printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n", 516 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR)); 517 printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n", 518 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR)); 519 520 /* clear error detect register */ 521 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect); 522 523 if (err_detect & L2_EDE_CE_MASK) 524 edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name); 525 526 if (err_detect & L2_EDE_UE_MASK) 527 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name); 528} 529 530static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id) 531{ 532 struct edac_device_ctl_info *edac_dev = dev_id; 533 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 534 u32 err_detect; 535 536 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET); 537 538 if (!(err_detect & L2_EDE_MASK)) 539 return IRQ_NONE; 540 541 mpc85xx_l2_check(edac_dev); 542 543 return IRQ_HANDLED; 544} 545 546static int mpc85xx_l2_err_probe(struct platform_device *op) 547{ 548 struct edac_device_ctl_info *edac_dev; 549 struct mpc85xx_l2_pdata *pdata; 550 struct resource r; 551 int res; 552 553 if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL)) 554 return -ENOMEM; 555 556 edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata), 557 "cpu", 1, "L", 1, 2, NULL, 0, 558 edac_dev_idx); 559 if (!edac_dev) { 560 devres_release_group(&op->dev, mpc85xx_l2_err_probe); 561 return -ENOMEM; 562 } 563 564 pdata = edac_dev->pvt_info; 565 pdata->name = "mpc85xx_l2_err"; 566 pdata->irq = NO_IRQ; 567 edac_dev->dev = &op->dev; 568 dev_set_drvdata(edac_dev->dev, edac_dev); 569 edac_dev->ctl_name = pdata->name; 570 edac_dev->dev_name = pdata->name; 571 572 res = of_address_to_resource(op->dev.of_node, 0, &r); 573 if (res) { 574 printk(KERN_ERR "%s: Unable to get resource for " 575 "L2 err regs\n", __func__); 576 goto err; 577 } 578 579 /* we only need the error registers */ 580 r.start += 0xe00; 581 582 if (!devm_request_mem_region(&op->dev, r.start, resource_size(&r), 583 pdata->name)) { 584 printk(KERN_ERR "%s: Error while requesting mem region\n", 585 __func__); 586 res = -EBUSY; 587 goto err; 588 } 589 590 pdata->l2_vbase = devm_ioremap(&op->dev, r.start, resource_size(&r)); 591 if (!pdata->l2_vbase) { 592 printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__); 593 res = -ENOMEM; 594 goto err; 595 } 596 597 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0); 598 599 orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS); 600 601 /* clear the err_dis */ 602 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0); 603 604 edac_dev->mod_name = EDAC_MOD_STR; 605 606 if (edac_op_state == EDAC_OPSTATE_POLL) 607 edac_dev->edac_check = mpc85xx_l2_check; 608 609 mpc85xx_set_l2_sysfs_attributes(edac_dev); 610 611 pdata->edac_idx = edac_dev_idx++; 612 613 if (edac_device_add_device(edac_dev) > 0) { 614 edac_dbg(3, "failed edac_device_add_device()\n"); 615 goto err; 616 } 617 618 if (edac_op_state == EDAC_OPSTATE_INT) { 619 pdata->irq = irq_of_parse_and_map(op->dev.of_node, 0); 620 res = devm_request_irq(&op->dev, pdata->irq, 621 mpc85xx_l2_isr, IRQF_SHARED, 622 "[EDAC] L2 err", edac_dev); 623 if (res < 0) { 624 printk(KERN_ERR 625 "%s: Unable to request irq %d for " 626 "MPC85xx L2 err\n", __func__, pdata->irq); 627 irq_dispose_mapping(pdata->irq); 628 res = -ENODEV; 629 goto err2; 630 } 631 632 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n", 633 pdata->irq); 634 635 edac_dev->op_state = OP_RUNNING_INTERRUPT; 636 637 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK); 638 } 639 640 devres_remove_group(&op->dev, mpc85xx_l2_err_probe); 641 642 edac_dbg(3, "success\n"); 643 printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n"); 644 645 return 0; 646 647err2: 648 edac_device_del_device(&op->dev); 649err: 650 devres_release_group(&op->dev, mpc85xx_l2_err_probe); 651 edac_device_free_ctl_info(edac_dev); 652 return res; 653} 654 655static int mpc85xx_l2_err_remove(struct platform_device *op) 656{ 657 struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev); 658 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info; 659 660 edac_dbg(0, "\n"); 661 662 if (edac_op_state == EDAC_OPSTATE_INT) { 663 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0); 664 irq_dispose_mapping(pdata->irq); 665 } 666 667 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable); 668 edac_device_del_device(&op->dev); 669 edac_device_free_ctl_info(edac_dev); 670 return 0; 671} 672 673static const struct of_device_id mpc85xx_l2_err_of_match[] = { 674/* deprecate the fsl,85.. forms in the future, 2.6.30? */ 675 { .compatible = "fsl,8540-l2-cache-controller", }, 676 { .compatible = "fsl,8541-l2-cache-controller", }, 677 { .compatible = "fsl,8544-l2-cache-controller", }, 678 { .compatible = "fsl,8548-l2-cache-controller", }, 679 { .compatible = "fsl,8555-l2-cache-controller", }, 680 { .compatible = "fsl,8568-l2-cache-controller", }, 681 { .compatible = "fsl,mpc8536-l2-cache-controller", }, 682 { .compatible = "fsl,mpc8540-l2-cache-controller", }, 683 { .compatible = "fsl,mpc8541-l2-cache-controller", }, 684 { .compatible = "fsl,mpc8544-l2-cache-controller", }, 685 { .compatible = "fsl,mpc8548-l2-cache-controller", }, 686 { .compatible = "fsl,mpc8555-l2-cache-controller", }, 687 { .compatible = "fsl,mpc8560-l2-cache-controller", }, 688 { .compatible = "fsl,mpc8568-l2-cache-controller", }, 689 { .compatible = "fsl,mpc8569-l2-cache-controller", }, 690 { .compatible = "fsl,mpc8572-l2-cache-controller", }, 691 { .compatible = "fsl,p1020-l2-cache-controller", }, 692 { .compatible = "fsl,p1021-l2-cache-controller", }, 693 { .compatible = "fsl,p2020-l2-cache-controller", }, 694 {}, 695}; 696MODULE_DEVICE_TABLE(of, mpc85xx_l2_err_of_match); 697 698static struct platform_driver mpc85xx_l2_err_driver = { 699 .probe = mpc85xx_l2_err_probe, 700 .remove = mpc85xx_l2_err_remove, 701 .driver = { 702 .name = "mpc85xx_l2_err", 703 .of_match_table = mpc85xx_l2_err_of_match, 704 }, 705}; 706 707/**************************** MC Err device ***************************/ 708 709/* 710 * Taken from table 8-55 in the MPC8641 User's Manual and/or 9-61 in the 711 * MPC8572 User's Manual. Each line represents a syndrome bit column as a 712 * 64-bit value, but split into an upper and lower 32-bit chunk. The labels 713 * below correspond to Freescale's manuals. 714 */ 715static unsigned int ecc_table[16] = { 716 /* MSB LSB */ 717 /* [0:31] [32:63] */ 718 0xf00fe11e, 0xc33c0ff7, /* Syndrome bit 7 */ 719 0x00ff00ff, 0x00fff0ff, 720 0x0f0f0f0f, 0x0f0fff00, 721 0x11113333, 0x7777000f, 722 0x22224444, 0x8888222f, 723 0x44448888, 0xffff4441, 724 0x8888ffff, 0x11118882, 725 0xffff1111, 0x22221114, /* Syndrome bit 0 */ 726}; 727 728/* 729 * Calculate the correct ECC value for a 64-bit value specified by high:low 730 */ 731static u8 calculate_ecc(u32 high, u32 low) 732{ 733 u32 mask_low; 734 u32 mask_high; 735 int bit_cnt; 736 u8 ecc = 0; 737 int i; 738 int j; 739 740 for (i = 0; i < 8; i++) { 741 mask_high = ecc_table[i * 2]; 742 mask_low = ecc_table[i * 2 + 1]; 743 bit_cnt = 0; 744 745 for (j = 0; j < 32; j++) { 746 if ((mask_high >> j) & 1) 747 bit_cnt ^= (high >> j) & 1; 748 if ((mask_low >> j) & 1) 749 bit_cnt ^= (low >> j) & 1; 750 } 751 752 ecc |= bit_cnt << i; 753 } 754 755 return ecc; 756} 757 758/* 759 * Create the syndrome code which is generated if the data line specified by 760 * 'bit' failed. Eg generate an 8-bit codes seen in Table 8-55 in the MPC8641 761 * User's Manual and 9-61 in the MPC8572 User's Manual. 762 */ 763static u8 syndrome_from_bit(unsigned int bit) { 764 int i; 765 u8 syndrome = 0; 766 767 /* 768 * Cycle through the upper or lower 32-bit portion of each value in 769 * ecc_table depending on if 'bit' is in the upper or lower half of 770 * 64-bit data. 771 */ 772 for (i = bit < 32; i < 16; i += 2) 773 syndrome |= ((ecc_table[i] >> (bit % 32)) & 1) << (i / 2); 774 775 return syndrome; 776} 777 778/* 779 * Decode data and ecc syndrome to determine what went wrong 780 * Note: This can only decode single-bit errors 781 */ 782static void sbe_ecc_decode(u32 cap_high, u32 cap_low, u32 cap_ecc, 783 int *bad_data_bit, int *bad_ecc_bit) 784{ 785 int i; 786 u8 syndrome; 787 788 *bad_data_bit = -1; 789 *bad_ecc_bit = -1; 790 791 /* 792 * Calculate the ECC of the captured data and XOR it with the captured 793 * ECC to find an ECC syndrome value we can search for 794 */ 795 syndrome = calculate_ecc(cap_high, cap_low) ^ cap_ecc; 796 797 /* Check if a data line is stuck... */ 798 for (i = 0; i < 64; i++) { 799 if (syndrome == syndrome_from_bit(i)) { 800 *bad_data_bit = i; 801 return; 802 } 803 } 804 805 /* If data is correct, check ECC bits for errors... */ 806 for (i = 0; i < 8; i++) { 807 if ((syndrome >> i) & 0x1) { 808 *bad_ecc_bit = i; 809 return; 810 } 811 } 812} 813 814#define make64(high, low) (((u64)(high) << 32) | (low)) 815 816static void mpc85xx_mc_check(struct mem_ctl_info *mci) 817{ 818 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 819 struct csrow_info *csrow; 820 u32 bus_width; 821 u32 err_detect; 822 u32 syndrome; 823 u64 err_addr; 824 u32 pfn; 825 int row_index; 826 u32 cap_high; 827 u32 cap_low; 828 int bad_data_bit; 829 int bad_ecc_bit; 830 831 err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT); 832 if (!err_detect) 833 return; 834 835 mpc85xx_mc_printk(mci, KERN_ERR, "Err Detect Register: %#8.8x\n", 836 err_detect); 837 838 /* no more processing if not ECC bit errors */ 839 if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) { 840 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect); 841 return; 842 } 843 844 syndrome = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ECC); 845 846 /* Mask off appropriate bits of syndrome based on bus width */ 847 bus_width = (in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG) & 848 DSC_DBW_MASK) ? 32 : 64; 849 if (bus_width == 64) 850 syndrome &= 0xff; 851 else 852 syndrome &= 0xffff; 853 854 err_addr = make64( 855 in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_EXT_ADDRESS), 856 in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ADDRESS)); 857 pfn = err_addr >> PAGE_SHIFT; 858 859 for (row_index = 0; row_index < mci->nr_csrows; row_index++) { 860 csrow = mci->csrows[row_index]; 861 if ((pfn >= csrow->first_page) && (pfn <= csrow->last_page)) 862 break; 863 } 864 865 cap_high = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_DATA_HI); 866 cap_low = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_DATA_LO); 867 868 /* 869 * Analyze single-bit errors on 64-bit wide buses 870 * TODO: Add support for 32-bit wide buses 871 */ 872 if ((err_detect & DDR_EDE_SBE) && (bus_width == 64)) { 873 sbe_ecc_decode(cap_high, cap_low, syndrome, 874 &bad_data_bit, &bad_ecc_bit); 875 876 if (bad_data_bit != -1) 877 mpc85xx_mc_printk(mci, KERN_ERR, 878 "Faulty Data bit: %d\n", bad_data_bit); 879 if (bad_ecc_bit != -1) 880 mpc85xx_mc_printk(mci, KERN_ERR, 881 "Faulty ECC bit: %d\n", bad_ecc_bit); 882 883 mpc85xx_mc_printk(mci, KERN_ERR, 884 "Expected Data / ECC:\t%#8.8x_%08x / %#2.2x\n", 885 cap_high ^ (1 << (bad_data_bit - 32)), 886 cap_low ^ (1 << bad_data_bit), 887 syndrome ^ (1 << bad_ecc_bit)); 888 } 889 890 mpc85xx_mc_printk(mci, KERN_ERR, 891 "Captured Data / ECC:\t%#8.8x_%08x / %#2.2x\n", 892 cap_high, cap_low, syndrome); 893 mpc85xx_mc_printk(mci, KERN_ERR, "Err addr: %#8.8llx\n", err_addr); 894 mpc85xx_mc_printk(mci, KERN_ERR, "PFN: %#8.8x\n", pfn); 895 896 /* we are out of range */ 897 if (row_index == mci->nr_csrows) 898 mpc85xx_mc_printk(mci, KERN_ERR, "PFN out of range!\n"); 899 900 if (err_detect & DDR_EDE_SBE) 901 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 902 pfn, err_addr & ~PAGE_MASK, syndrome, 903 row_index, 0, -1, 904 mci->ctl_name, ""); 905 906 if (err_detect & DDR_EDE_MBE) 907 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 908 pfn, err_addr & ~PAGE_MASK, syndrome, 909 row_index, 0, -1, 910 mci->ctl_name, ""); 911 912 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect); 913} 914 915static irqreturn_t mpc85xx_mc_isr(int irq, void *dev_id) 916{ 917 struct mem_ctl_info *mci = dev_id; 918 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 919 u32 err_detect; 920 921 err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT); 922 if (!err_detect) 923 return IRQ_NONE; 924 925 mpc85xx_mc_check(mci); 926 927 return IRQ_HANDLED; 928} 929 930static void mpc85xx_init_csrows(struct mem_ctl_info *mci) 931{ 932 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 933 struct csrow_info *csrow; 934 struct dimm_info *dimm; 935 u32 sdram_ctl; 936 u32 sdtype; 937 enum mem_type mtype; 938 u32 cs_bnds; 939 int index; 940 941 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG); 942 943 sdtype = sdram_ctl & DSC_SDTYPE_MASK; 944 if (sdram_ctl & DSC_RD_EN) { 945 switch (sdtype) { 946 case DSC_SDTYPE_DDR: 947 mtype = MEM_RDDR; 948 break; 949 case DSC_SDTYPE_DDR2: 950 mtype = MEM_RDDR2; 951 break; 952 case DSC_SDTYPE_DDR3: 953 mtype = MEM_RDDR3; 954 break; 955 default: 956 mtype = MEM_UNKNOWN; 957 break; 958 } 959 } else { 960 switch (sdtype) { 961 case DSC_SDTYPE_DDR: 962 mtype = MEM_DDR; 963 break; 964 case DSC_SDTYPE_DDR2: 965 mtype = MEM_DDR2; 966 break; 967 case DSC_SDTYPE_DDR3: 968 mtype = MEM_DDR3; 969 break; 970 default: 971 mtype = MEM_UNKNOWN; 972 break; 973 } 974 } 975 976 for (index = 0; index < mci->nr_csrows; index++) { 977 u32 start; 978 u32 end; 979 980 csrow = mci->csrows[index]; 981 dimm = csrow->channels[0]->dimm; 982 983 cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 + 984 (index * MPC85XX_MC_CS_BNDS_OFS)); 985 986 start = (cs_bnds & 0xffff0000) >> 16; 987 end = (cs_bnds & 0x0000ffff); 988 989 if (start == end) 990 continue; /* not populated */ 991 992 start <<= (24 - PAGE_SHIFT); 993 end <<= (24 - PAGE_SHIFT); 994 end |= (1 << (24 - PAGE_SHIFT)) - 1; 995 996 csrow->first_page = start; 997 csrow->last_page = end; 998 999 dimm->nr_pages = end + 1 - start; 1000 dimm->grain = 8; 1001 dimm->mtype = mtype; 1002 dimm->dtype = DEV_UNKNOWN; 1003 if (sdram_ctl & DSC_X32_EN) 1004 dimm->dtype = DEV_X32; 1005 dimm->edac_mode = EDAC_SECDED; 1006 } 1007} 1008 1009static int mpc85xx_mc_err_probe(struct platform_device *op) 1010{ 1011 struct mem_ctl_info *mci; 1012 struct edac_mc_layer layers[2]; 1013 struct mpc85xx_mc_pdata *pdata; 1014 struct resource r; 1015 u32 sdram_ctl; 1016 int res; 1017 1018 if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL)) 1019 return -ENOMEM; 1020 1021 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; 1022 layers[0].size = 4; 1023 layers[0].is_virt_csrow = true; 1024 layers[1].type = EDAC_MC_LAYER_CHANNEL; 1025 layers[1].size = 1; 1026 layers[1].is_virt_csrow = false; 1027 mci = edac_mc_alloc(edac_mc_idx, ARRAY_SIZE(layers), layers, 1028 sizeof(*pdata)); 1029 if (!mci) { 1030 devres_release_group(&op->dev, mpc85xx_mc_err_probe); 1031 return -ENOMEM; 1032 } 1033 1034 pdata = mci->pvt_info; 1035 pdata->name = "mpc85xx_mc_err"; 1036 pdata->irq = NO_IRQ; 1037 mci->pdev = &op->dev; 1038 pdata->edac_idx = edac_mc_idx++; 1039 dev_set_drvdata(mci->pdev, mci); 1040 mci->ctl_name = pdata->name; 1041 mci->dev_name = pdata->name; 1042 1043 res = of_address_to_resource(op->dev.of_node, 0, &r); 1044 if (res) { 1045 printk(KERN_ERR "%s: Unable to get resource for MC err regs\n", 1046 __func__); 1047 goto err; 1048 } 1049 1050 if (!devm_request_mem_region(&op->dev, r.start, resource_size(&r), 1051 pdata->name)) { 1052 printk(KERN_ERR "%s: Error while requesting mem region\n", 1053 __func__); 1054 res = -EBUSY; 1055 goto err; 1056 } 1057 1058 pdata->mc_vbase = devm_ioremap(&op->dev, r.start, resource_size(&r)); 1059 if (!pdata->mc_vbase) { 1060 printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__); 1061 res = -ENOMEM; 1062 goto err; 1063 } 1064 1065 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG); 1066 if (!(sdram_ctl & DSC_ECC_EN)) { 1067 /* no ECC */ 1068 printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__); 1069 res = -ENODEV; 1070 goto err; 1071 } 1072 1073 edac_dbg(3, "init mci\n"); 1074 mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 | 1075 MEM_FLAG_DDR | MEM_FLAG_DDR2; 1076 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED; 1077 mci->edac_cap = EDAC_FLAG_SECDED; 1078 mci->mod_name = EDAC_MOD_STR; 1079 mci->mod_ver = MPC85XX_REVISION; 1080 1081 if (edac_op_state == EDAC_OPSTATE_POLL) 1082 mci->edac_check = mpc85xx_mc_check; 1083 1084 mci->ctl_page_to_phys = NULL; 1085 1086 mci->scrub_mode = SCRUB_SW_SRC; 1087 1088 mpc85xx_init_csrows(mci); 1089 1090 /* store the original error disable bits */ 1091 orig_ddr_err_disable = 1092 in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE); 1093 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0); 1094 1095 /* clear all error bits */ 1096 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0); 1097 1098 if (edac_mc_add_mc_with_groups(mci, mpc85xx_dev_groups)) { 1099 edac_dbg(3, "failed edac_mc_add_mc()\n"); 1100 goto err; 1101 } 1102 1103 if (edac_op_state == EDAC_OPSTATE_INT) { 1104 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 1105 DDR_EIE_MBEE | DDR_EIE_SBEE); 1106 1107 /* store the original error management threshold */ 1108 orig_ddr_err_sbe = in_be32(pdata->mc_vbase + 1109 MPC85XX_MC_ERR_SBE) & 0xff0000; 1110 1111 /* set threshold to 1 error per interrupt */ 1112 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000); 1113 1114 /* register interrupts */ 1115 pdata->irq = irq_of_parse_and_map(op->dev.of_node, 0); 1116 res = devm_request_irq(&op->dev, pdata->irq, 1117 mpc85xx_mc_isr, 1118 IRQF_SHARED, 1119 "[EDAC] MC err", mci); 1120 if (res < 0) { 1121 printk(KERN_ERR "%s: Unable to request irq %d for " 1122 "MPC85xx DRAM ERR\n", __func__, pdata->irq); 1123 irq_dispose_mapping(pdata->irq); 1124 res = -ENODEV; 1125 goto err2; 1126 } 1127 1128 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n", 1129 pdata->irq); 1130 } 1131 1132 devres_remove_group(&op->dev, mpc85xx_mc_err_probe); 1133 edac_dbg(3, "success\n"); 1134 printk(KERN_INFO EDAC_MOD_STR " MC err registered\n"); 1135 1136 return 0; 1137 1138err2: 1139 edac_mc_del_mc(&op->dev); 1140err: 1141 devres_release_group(&op->dev, mpc85xx_mc_err_probe); 1142 edac_mc_free(mci); 1143 return res; 1144} 1145 1146static int mpc85xx_mc_err_remove(struct platform_device *op) 1147{ 1148 struct mem_ctl_info *mci = dev_get_drvdata(&op->dev); 1149 struct mpc85xx_mc_pdata *pdata = mci->pvt_info; 1150 1151 edac_dbg(0, "\n"); 1152 1153 if (edac_op_state == EDAC_OPSTATE_INT) { 1154 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0); 1155 irq_dispose_mapping(pdata->irq); 1156 } 1157 1158 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 1159 orig_ddr_err_disable); 1160 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe); 1161 1162 edac_mc_del_mc(&op->dev); 1163 edac_mc_free(mci); 1164 return 0; 1165} 1166 1167static const struct of_device_id mpc85xx_mc_err_of_match[] = { 1168/* deprecate the fsl,85.. forms in the future, 2.6.30? */ 1169 { .compatible = "fsl,8540-memory-controller", }, 1170 { .compatible = "fsl,8541-memory-controller", }, 1171 { .compatible = "fsl,8544-memory-controller", }, 1172 { .compatible = "fsl,8548-memory-controller", }, 1173 { .compatible = "fsl,8555-memory-controller", }, 1174 { .compatible = "fsl,8568-memory-controller", }, 1175 { .compatible = "fsl,mpc8536-memory-controller", }, 1176 { .compatible = "fsl,mpc8540-memory-controller", }, 1177 { .compatible = "fsl,mpc8541-memory-controller", }, 1178 { .compatible = "fsl,mpc8544-memory-controller", }, 1179 { .compatible = "fsl,mpc8548-memory-controller", }, 1180 { .compatible = "fsl,mpc8555-memory-controller", }, 1181 { .compatible = "fsl,mpc8560-memory-controller", }, 1182 { .compatible = "fsl,mpc8568-memory-controller", }, 1183 { .compatible = "fsl,mpc8569-memory-controller", }, 1184 { .compatible = "fsl,mpc8572-memory-controller", }, 1185 { .compatible = "fsl,mpc8349-memory-controller", }, 1186 { .compatible = "fsl,p1020-memory-controller", }, 1187 { .compatible = "fsl,p1021-memory-controller", }, 1188 { .compatible = "fsl,p2020-memory-controller", }, 1189 { .compatible = "fsl,qoriq-memory-controller", }, 1190 {}, 1191}; 1192MODULE_DEVICE_TABLE(of, mpc85xx_mc_err_of_match); 1193 1194static struct platform_driver mpc85xx_mc_err_driver = { 1195 .probe = mpc85xx_mc_err_probe, 1196 .remove = mpc85xx_mc_err_remove, 1197 .driver = { 1198 .name = "mpc85xx_mc_err", 1199 .of_match_table = mpc85xx_mc_err_of_match, 1200 }, 1201}; 1202 1203#ifdef CONFIG_FSL_SOC_BOOKE 1204static void __init mpc85xx_mc_clear_rfxe(void *data) 1205{ 1206 orig_hid1[smp_processor_id()] = mfspr(SPRN_HID1); 1207 mtspr(SPRN_HID1, (orig_hid1[smp_processor_id()] & ~HID1_RFXE)); 1208} 1209#endif 1210 1211static int __init mpc85xx_mc_init(void) 1212{ 1213 int res = 0; 1214 u32 pvr = 0; 1215 1216 printk(KERN_INFO "Freescale(R) MPC85xx EDAC driver, " 1217 "(C) 2006 Montavista Software\n"); 1218 1219 /* make sure error reporting method is sane */ 1220 switch (edac_op_state) { 1221 case EDAC_OPSTATE_POLL: 1222 case EDAC_OPSTATE_INT: 1223 break; 1224 default: 1225 edac_op_state = EDAC_OPSTATE_INT; 1226 break; 1227 } 1228 1229 res = platform_driver_register(&mpc85xx_mc_err_driver); 1230 if (res) 1231 printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n"); 1232 1233 res = platform_driver_register(&mpc85xx_l2_err_driver); 1234 if (res) 1235 printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n"); 1236 1237#ifdef CONFIG_FSL_SOC_BOOKE 1238 pvr = mfspr(SPRN_PVR); 1239 1240 if ((PVR_VER(pvr) == PVR_VER_E500V1) || 1241 (PVR_VER(pvr) == PVR_VER_E500V2)) { 1242 /* 1243 * need to clear HID1[RFXE] to disable machine check int 1244 * so we can catch it 1245 */ 1246 if (edac_op_state == EDAC_OPSTATE_INT) 1247 on_each_cpu(mpc85xx_mc_clear_rfxe, NULL, 0); 1248 } 1249#endif 1250 1251 return 0; 1252} 1253 1254module_init(mpc85xx_mc_init); 1255 1256#ifdef CONFIG_FSL_SOC_BOOKE 1257static void __exit mpc85xx_mc_restore_hid1(void *data) 1258{ 1259 mtspr(SPRN_HID1, orig_hid1[smp_processor_id()]); 1260} 1261#endif 1262 1263static void __exit mpc85xx_mc_exit(void) 1264{ 1265#ifdef CONFIG_FSL_SOC_BOOKE 1266 u32 pvr = mfspr(SPRN_PVR); 1267 1268 if ((PVR_VER(pvr) == PVR_VER_E500V1) || 1269 (PVR_VER(pvr) == PVR_VER_E500V2)) { 1270 on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0); 1271 } 1272#endif 1273 platform_driver_unregister(&mpc85xx_l2_err_driver); 1274 platform_driver_unregister(&mpc85xx_mc_err_driver); 1275} 1276 1277module_exit(mpc85xx_mc_exit); 1278 1279MODULE_LICENSE("GPL"); 1280MODULE_AUTHOR("Montavista Software, Inc."); 1281module_param(edac_op_state, int, 0444); 1282MODULE_PARM_DESC(edac_op_state, 1283 "EDAC Error Reporting state: 0=Poll, 2=Interrupt"); 1284