drivers/edac/mpc85xx_edac.c

   1 /*
   2  * Freescale MPC85xx Memory Controller kenel module
   3  *
   4  * Author: Dave Jiang <djiang@mvista.com>
   5  *
   6  * 2006-2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  *
  11  */
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/slab.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/ctype.h>
  17 #include <linux/io.h>
  18 #include <linux/mod_devicetable.h>
  19 #include <linux/edac.h>
  20
  21 #include <linux/of_platform.h>
  22 #include <linux/of_device.h>
  23 #include "edac_module.h"
  24 #include "edac_core.h"
  25 #include "mpc85xx_edac.h"
  26
  27 static int edac_dev_idx;
  28 static int edac_pci_idx;
  29 static int edac_mc_idx;
  30
  31 static u32 orig_ddr_err_disable;
  32 static u32 orig_ddr_err_sbe;
  33
  34 /*
  35  * PCI Err defines
  36  */
  37 #ifdef CONFIG_PCI
  38 static u32 orig_pci_err_cap_dr;
  39 static u32 orig_pci_err_en;
  40 #endif
  41
  42 static u32 orig_l2_err_disable;
  43 static u32 orig_hid1;
  44
  45 /************************ MC SYSFS parts ***********************************/
  46
  47 static ssize_t mpc85xx_mc_inject_data_hi_show(struct mem_ctl_info *mci,
  48                                               char *data)
  49 {
  50         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
  51         return sprintf(data, "0x%08x",
  52                        in_be32(pdata->mc_vbase +
  53                                MPC85XX_MC_DATA_ERR_INJECT_HI));
  54 }
  55
  56 static ssize_t mpc85xx_mc_inject_data_lo_show(struct mem_ctl_info *mci,
  57                                               char *data)
  58 {
  59         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
  60         return sprintf(data, "0x%08x",
  61                        in_be32(pdata->mc_vbase +
  62                                MPC85XX_MC_DATA_ERR_INJECT_LO));
  63 }
  64
  65 static ssize_t mpc85xx_mc_inject_ctrl_show(struct mem_ctl_info *mci, char *data)
  66 {
  67         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
  68         return sprintf(data, "0x%08x",
  69                        in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT));
  70 }
  71
  72 static ssize_t mpc85xx_mc_inject_data_hi_store(struct mem_ctl_info *mci,
  73                                                const char *data, size_t count)
  74 {
  75         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
  76         if (isdigit(*data)) {
  77                 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI,
  78                          simple_strtoul(data, NULL, 0));
  79                 return count;
  80         }
  81         return 0;
  82 }
  83
  84 static ssize_t mpc85xx_mc_inject_data_lo_store(struct mem_ctl_info *mci,
  85                                                const char *data, size_t count)
  86 {
  87         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
  88         if (isdigit(*data)) {
  89                 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO,
  90                          simple_strtoul(data, NULL, 0));
  91                 return count;
  92         }
  93         return 0;
  94 }
  95
  96 static ssize_t mpc85xx_mc_inject_ctrl_store(struct mem_ctl_info *mci,
  97                                             const char *data, size_t count)
  98 {
  99         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
 100         if (isdigit(*data)) {
 101                 out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT,
 102                          simple_strtoul(data, NULL, 0));
 103                 return count;
 104         }
 105         return 0;
 106 }
 107
 108 static struct mcidev_sysfs_attribute mpc85xx_mc_sysfs_attributes[] = {
 109         {
 110          .attr = {
 111                   .name = "inject_data_hi",
 112                   .mode = (S_IRUGO | S_IWUSR)
 113                   },
 114          .show = mpc85xx_mc_inject_data_hi_show,
 115          .store = mpc85xx_mc_inject_data_hi_store},
 116         {
 117          .attr = {
 118                   .name = "inject_data_lo",
 119                   .mode = (S_IRUGO | S_IWUSR)
 120                   },
 121          .show = mpc85xx_mc_inject_data_lo_show,
 122          .store = mpc85xx_mc_inject_data_lo_store},
 123         {
 124          .attr = {
 125                   .name = "inject_ctrl",
 126                   .mode = (S_IRUGO | S_IWUSR)
 127                   },
 128          .show = mpc85xx_mc_inject_ctrl_show,
 129          .store = mpc85xx_mc_inject_ctrl_store},
 130
 131         /* End of list */
 132         {
 133          .attr = {.name = NULL}
 134          }
 135 };
 136
 137 static void mpc85xx_set_mc_sysfs_attributes(struct mem_ctl_info *mci)
 138 {
 139         mci->mc_driver_sysfs_attributes = mpc85xx_mc_sysfs_attributes;
 140 }
 141
 142 /**************************** PCI Err device ***************************/
 143 #ifdef CONFIG_PCI
 144
 145 static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci)
 146 {
 147         struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
 148         u32 err_detect;
 149
 150         err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
 151
 152         /* master aborts can happen during PCI config cycles */
 153         if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) {
 154                 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
 155                 return;
 156         }
 157
 158         printk(KERN_ERR "PCI error(s) detected\n");
 159         printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect);
 160
 161         printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n",
 162                in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB));
 163         printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n",
 164                in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR));
 165         printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n",
 166                in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR));
 167         printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n",
 168                in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL));
 169         printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n",
 170                in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH));
 171
 172         /* clear error bits */
 173         out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
 174
 175         if (err_detect & PCI_EDE_PERR_MASK)
 176                 edac_pci_handle_pe(pci, pci->ctl_name);
 177
 178         if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK)
 179                 edac_pci_handle_npe(pci, pci->ctl_name);
 180 }
 181
 182 static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id)
 183 {
 184         struct edac_pci_ctl_info *pci = dev_id;
 185         struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
 186         u32 err_detect;
 187
 188         err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
 189
 190         if (!err_detect)
 191                 return IRQ_NONE;
 192
 193         mpc85xx_pci_check(pci);
 194
 195         return IRQ_HANDLED;
 196 }
 197
 198 static int __devinit mpc85xx_pci_err_probe(struct of_device *op,
 199                                            const struct of_device_id *match)
 200 {
 201         struct edac_pci_ctl_info *pci;
 202         struct mpc85xx_pci_pdata *pdata;
 203         struct resource r;
 204         int res = 0;
 205
 206         if (!devres_open_group(&op->dev, mpc85xx_pci_err_probe, GFP_KERNEL))
 207                 return -ENOMEM;
 208
 209         pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err");
 210         if (!pci)
 211                 return -ENOMEM;
 212
 213         pdata = pci->pvt_info;
 214         pdata->name = "mpc85xx_pci_err";
 215         pdata->irq = NO_IRQ;
 216         dev_set_drvdata(&op->dev, pci);
 217         pci->dev = &op->dev;
 218         pci->mod_name = EDAC_MOD_STR;
 219         pci->ctl_name = pdata->name;
 220         pci->dev_name = op->dev.bus_id;
 221
 222         if (edac_op_state == EDAC_OPSTATE_POLL)
 223                 pci->edac_check = mpc85xx_pci_check;
 224
 225         pdata->edac_idx = edac_pci_idx++;
 226
 227         res = of_address_to_resource(op->node, 0, &r);
 228         if (res) {
 229                 printk(KERN_ERR "%s: Unable to get resource for "
 230                        "PCI err regs\n", __func__);
 231                 goto err;
 232         }
 233
 234         /* we only need the error registers */
 235         r.start += 0xe00;
 236
 237         if (!devm_request_mem_region(&op->dev, r.start,
 238                                         r.end - r.start + 1, pdata->name)) {
 239                 printk(KERN_ERR "%s: Error while requesting mem region\n",
 240                        __func__);
 241                 res = -EBUSY;
 242                 goto err;
 243         }
 244
 245         pdata->pci_vbase = devm_ioremap(&op->dev, r.start,
 246                                         r.end - r.start + 1);
 247         if (!pdata->pci_vbase) {
 248                 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
 249                 res = -ENOMEM;
 250                 goto err;
 251         }
 252
 253         orig_pci_err_cap_dr =
 254             in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR);
 255
 256         /* PCI master abort is expected during config cycles */
 257         out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40);
 258
 259         orig_pci_err_en = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN);
 260
 261         /* disable master abort reporting */
 262         out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40);
 263
 264         /* clear error bits */
 265         out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0);
 266
 267         if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
 268                 debugf3("%s(): failed edac_pci_add_device()\n", __func__);
 269                 goto err;
 270         }
 271
 272         if (edac_op_state == EDAC_OPSTATE_INT) {
 273                 pdata->irq = irq_of_parse_and_map(op->node, 0);
 274                 res = devm_request_irq(&op->dev, pdata->irq,
 275                                        mpc85xx_pci_isr, IRQF_DISABLED,
 276                                        "[EDAC] PCI err", pci);
 277                 if (res < 0) {
 278                         printk(KERN_ERR
 279                                "%s: Unable to requiest irq %d for "
 280                                "MPC85xx PCI err\n", __func__, pdata->irq);
 281                         irq_dispose_mapping(pdata->irq);
 282                         res = -ENODEV;
 283                         goto err2;
 284                 }
 285
 286                 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
 287                        pdata->irq);
 288         }
 289
 290         devres_remove_group(&op->dev, mpc85xx_pci_err_probe);
 291         debugf3("%s(): success\n", __func__);
 292         printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n");
 293
 294         return 0;
 295
 296 err2:
 297         edac_pci_del_device(&op->dev);
 298 err:
 299         edac_pci_free_ctl_info(pci);
 300         devres_release_group(&op->dev, mpc85xx_pci_err_probe);
 301         return res;
 302 }
 303
 304 static int mpc85xx_pci_err_remove(struct of_device *op)
 305 {
 306         struct edac_pci_ctl_info *pci = dev_get_drvdata(&op->dev);
 307         struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
 308
 309         debugf0("%s()\n", __func__);
 310
 311         out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR,
 312                  orig_pci_err_cap_dr);
 313
 314         out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, orig_pci_err_en);
 315
 316         edac_pci_del_device(pci->dev);
 317
 318         if (edac_op_state == EDAC_OPSTATE_INT)
 319                 irq_dispose_mapping(pdata->irq);
 320
 321         edac_pci_free_ctl_info(pci);
 322
 323         return 0;
 324 }
 325
 326 static struct of_device_id mpc85xx_pci_err_of_match[] = {
 327         {
 328          .compatible = "fsl,mpc8540-pcix",
 329          },
 330         {
 331          .compatible = "fsl,mpc8540-pci",
 332         },
 333         {},
 334 };
 335
 336 static struct of_platform_driver mpc85xx_pci_err_driver = {
 337         .owner = THIS_MODULE,
 338         .name = "mpc85xx_pci_err",
 339         .match_table = mpc85xx_pci_err_of_match,
 340         .probe = mpc85xx_pci_err_probe,
 341         .remove = __devexit_p(mpc85xx_pci_err_remove),
 342         .driver = {
 343                    .name = "mpc85xx_pci_err",
 344                    .owner = THIS_MODULE,
 345                    },
 346 };
 347
 348 #endif                          /* CONFIG_PCI */
 349
 350 /**************************** L2 Err device ***************************/
 351
 352 /************************ L2 SYSFS parts ***********************************/
 353
 354 static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info
 355                                               *edac_dev, char *data)
 356 {
 357         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 358         return sprintf(data, "0x%08x",
 359                        in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI));
 360 }
 361
 362 static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info
 363                                               *edac_dev, char *data)
 364 {
 365         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 366         return sprintf(data, "0x%08x",
 367                        in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO));
 368 }
 369
 370 static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info
 371                                            *edac_dev, char *data)
 372 {
 373         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 374         return sprintf(data, "0x%08x",
 375                        in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL));
 376 }
 377
 378 static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info
 379                                                *edac_dev, const char *data,
 380                                                size_t count)
 381 {
 382         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 383         if (isdigit(*data)) {
 384                 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI,
 385                          simple_strtoul(data, NULL, 0));
 386                 return count;
 387         }
 388         return 0;
 389 }
 390
 391 static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info
 392                                                *edac_dev, const char *data,
 393                                                size_t count)
 394 {
 395         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 396         if (isdigit(*data)) {
 397                 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO,
 398                          simple_strtoul(data, NULL, 0));
 399                 return count;
 400         }
 401         return 0;
 402 }
 403
 404 static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info
 405                                             *edac_dev, const char *data,
 406                                             size_t count)
 407 {
 408         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 409         if (isdigit(*data)) {
 410                 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL,
 411                          simple_strtoul(data, NULL, 0));
 412                 return count;
 413         }
 414         return 0;
 415 }
 416
 417 static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = {
 418         {
 419          .attr = {
 420                   .name = "inject_data_hi",
 421                   .mode = (S_IRUGO | S_IWUSR)
 422                   },
 423          .show = mpc85xx_l2_inject_data_hi_show,
 424          .store = mpc85xx_l2_inject_data_hi_store},
 425         {
 426          .attr = {
 427                   .name = "inject_data_lo",
 428                   .mode = (S_IRUGO | S_IWUSR)
 429                   },
 430          .show = mpc85xx_l2_inject_data_lo_show,
 431          .store = mpc85xx_l2_inject_data_lo_store},
 432         {
 433          .attr = {
 434                   .name = "inject_ctrl",
 435                   .mode = (S_IRUGO | S_IWUSR)
 436                   },
 437          .show = mpc85xx_l2_inject_ctrl_show,
 438          .store = mpc85xx_l2_inject_ctrl_store},
 439
 440         /* End of list */
 441         {
 442          .attr = {.name = NULL}
 443          }
 444 };
 445
 446 static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info
 447                                             *edac_dev)
 448 {
 449         edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes;
 450 }
 451
 452 /***************************** L2 ops ***********************************/
 453
 454 static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev)
 455 {
 456         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 457         u32 err_detect;
 458
 459         err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
 460
 461         if (!(err_detect & L2_EDE_MASK))
 462                 return;
 463
 464         printk(KERN_ERR "ECC Error in CPU L2 cache\n");
 465         printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect);
 466         printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n",
 467                in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI));
 468         printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n",
 469                in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO));
 470         printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n",
 471                in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC));
 472         printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n",
 473                in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR));
 474         printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n",
 475                in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR));
 476
 477         /* clear error detect register */
 478         out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect);
 479
 480         if (err_detect & L2_EDE_CE_MASK)
 481                 edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
 482
 483         if (err_detect & L2_EDE_UE_MASK)
 484                 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
 485 }
 486
 487 static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id)
 488 {
 489         struct edac_device_ctl_info *edac_dev = dev_id;
 490         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 491         u32 err_detect;
 492
 493         err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
 494
 495         if (!(err_detect & L2_EDE_MASK))
 496                 return IRQ_NONE;
 497
 498         mpc85xx_l2_check(edac_dev);
 499
 500         return IRQ_HANDLED;
 501 }
 502
 503 static int __devinit mpc85xx_l2_err_probe(struct of_device *op,
 504                                           const struct of_device_id *match)
 505 {
 506         struct edac_device_ctl_info *edac_dev;
 507         struct mpc85xx_l2_pdata *pdata;
 508         struct resource r;
 509         int res;
 510
 511         if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL))
 512                 return -ENOMEM;
 513
 514         edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
 515                                               "cpu", 1, "L", 1, 2, NULL, 0,
 516                                               edac_dev_idx);
 517         if (!edac_dev) {
 518                 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
 519                 return -ENOMEM;
 520         }
 521
 522         pdata = edac_dev->pvt_info;
 523         pdata->name = "mpc85xx_l2_err";
 524         pdata->irq = NO_IRQ;
 525         edac_dev->dev = &op->dev;
 526         dev_set_drvdata(edac_dev->dev, edac_dev);
 527         edac_dev->ctl_name = pdata->name;
 528         edac_dev->dev_name = pdata->name;
 529
 530         res = of_address_to_resource(op->node, 0, &r);
 531         if (res) {
 532                 printk(KERN_ERR "%s: Unable to get resource for "
 533                        "L2 err regs\n", __func__);
 534                 goto err;
 535         }
 536
 537         /* we only need the error registers */
 538         r.start += 0xe00;
 539
 540         if (!devm_request_mem_region(&op->dev, r.start,
 541                                      r.end - r.start + 1, pdata->name)) {
 542                 printk(KERN_ERR "%s: Error while requesting mem region\n",
 543                        __func__);
 544                 res = -EBUSY;
 545                 goto err;
 546         }
 547
 548         pdata->l2_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
 549         if (!pdata->l2_vbase) {
 550                 printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__);
 551                 res = -ENOMEM;
 552                 goto err;
 553         }
 554
 555         out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0);
 556
 557         orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS);
 558
 559         /* clear the err_dis */
 560         out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0);
 561
 562         edac_dev->mod_name = EDAC_MOD_STR;
 563
 564         if (edac_op_state == EDAC_OPSTATE_POLL)
 565                 edac_dev->edac_check = mpc85xx_l2_check;
 566
 567         mpc85xx_set_l2_sysfs_attributes(edac_dev);
 568
 569         pdata->edac_idx = edac_dev_idx++;
 570
 571         if (edac_device_add_device(edac_dev) > 0) {
 572                 debugf3("%s(): failed edac_device_add_device()\n", __func__);
 573                 goto err;
 574         }
 575
 576         if (edac_op_state == EDAC_OPSTATE_INT) {
 577                 pdata->irq = irq_of_parse_and_map(op->node, 0);
 578                 res = devm_request_irq(&op->dev, pdata->irq,
 579                                        mpc85xx_l2_isr, IRQF_DISABLED,
 580                                        "[EDAC] L2 err", edac_dev);
 581                 if (res < 0) {
 582                         printk(KERN_ERR
 583                                "%s: Unable to requiest irq %d for "
 584                                "MPC85xx L2 err\n", __func__, pdata->irq);
 585                         irq_dispose_mapping(pdata->irq);
 586                         res = -ENODEV;
 587                         goto err2;
 588                 }
 589
 590                 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n",
 591                        pdata->irq);
 592
 593                 edac_dev->op_state = OP_RUNNING_INTERRUPT;
 594
 595                 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK);
 596         }
 597
 598         devres_remove_group(&op->dev, mpc85xx_l2_err_probe);
 599
 600         debugf3("%s(): success\n", __func__);
 601         printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n");
 602
 603         return 0;
 604
 605 err2:
 606         edac_device_del_device(&op->dev);
 607 err:
 608         devres_release_group(&op->dev, mpc85xx_l2_err_probe);
 609         edac_device_free_ctl_info(edac_dev);
 610         return res;
 611 }
 612
 613 static int mpc85xx_l2_err_remove(struct of_device *op)
 614 {
 615         struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
 616         struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
 617
 618         debugf0("%s()\n", __func__);
 619
 620         if (edac_op_state == EDAC_OPSTATE_INT) {
 621                 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0);
 622                 irq_dispose_mapping(pdata->irq);
 623         }
 624
 625         out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
 626         edac_device_del_device(&op->dev);
 627         edac_device_free_ctl_info(edac_dev);
 628         return 0;
 629 }
 630
 631 static struct of_device_id mpc85xx_l2_err_of_match[] = {
 632         {
 633          .compatible = "fsl,8540-l2-cache-controller",
 634          },
 635         {
 636          .compatible = "fsl,8541-l2-cache-controller",
 637          },
 638         {
 639          .compatible = "fsl,8544-l2-cache-controller",
 640          },
 641         {
 642          .compatible = "fsl,8548-l2-cache-controller",
 643          },
 644         {
 645          .compatible = "fsl,8555-l2-cache-controller",
 646          },
 647         {
 648          .compatible = "fsl,8568-l2-cache-controller",
 649          },
 650         {},
 651 };
 652
 653 static struct of_platform_driver mpc85xx_l2_err_driver = {
 654         .owner = THIS_MODULE,
 655         .name = "mpc85xx_l2_err",
 656         .match_table = mpc85xx_l2_err_of_match,
 657         .probe = mpc85xx_l2_err_probe,
 658         .remove = mpc85xx_l2_err_remove,
 659         .driver = {
 660                    .name = "mpc85xx_l2_err",
 661                    .owner = THIS_MODULE,
 662                    },
 663 };
 664
 665 /**************************** MC Err device ***************************/
 666
 667 static void mpc85xx_mc_check(struct mem_ctl_info *mci)
 668 {
 669         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
 670         struct csrow_info *csrow;
 671         u32 err_detect;
 672         u32 syndrome;
 673         u32 err_addr;
 674         u32 pfn;
 675         int row_index;
 676
 677         err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
 678         if (err_detect)
 679                 return;
 680
 681         mpc85xx_mc_printk(mci, KERN_ERR, "Err Detect Register: %#8.8x\n",
 682                           err_detect);
 683
 684         /* no more processing if not ECC bit errors */
 685         if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) {
 686                 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
 687                 return;
 688         }
 689
 690         syndrome = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ECC);
 691         err_addr = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ADDRESS);
 692         pfn = err_addr >> PAGE_SHIFT;
 693
 694         for (row_index = 0; row_index < mci->nr_csrows; row_index++) {
 695                 csrow = &mci->csrows[row_index];
 696                 if ((pfn >= csrow->first_page) && (pfn <= csrow->last_page))
 697                         break;
 698         }
 699
 700         mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data High: %#8.8x\n",
 701                           in_be32(pdata->mc_vbase +
 702                                   MPC85XX_MC_CAPTURE_DATA_HI));
 703         mpc85xx_mc_printk(mci, KERN_ERR, "Capture Data Low: %#8.8x\n",
 704                           in_be32(pdata->mc_vbase +
 705                                   MPC85XX_MC_CAPTURE_DATA_LO));
 706         mpc85xx_mc_printk(mci, KERN_ERR, "syndrome: %#8.8x\n", syndrome);
 707         mpc85xx_mc_printk(mci, KERN_ERR, "err addr: %#8.8x\n", err_addr);
 708         mpc85xx_mc_printk(mci, KERN_ERR, "PFN: %#8.8x\n", pfn);
 709
 710         /* we are out of range */
 711         if (row_index == mci->nr_csrows)
 712                 mpc85xx_mc_printk(mci, KERN_ERR, "PFN out of range!\n");
 713
 714         if (err_detect & DDR_EDE_SBE)
 715                 edac_mc_handle_ce(mci, pfn, err_addr & PAGE_MASK,
 716                                   syndrome, row_index, 0, mci->ctl_name);
 717
 718         if (err_detect & DDR_EDE_MBE)
 719                 edac_mc_handle_ue(mci, pfn, err_addr & PAGE_MASK,
 720                                   row_index, mci->ctl_name);
 721
 722         out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
 723 }
 724
 725 static irqreturn_t mpc85xx_mc_isr(int irq, void *dev_id)
 726 {
 727         struct mem_ctl_info *mci = dev_id;
 728         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
 729         u32 err_detect;
 730
 731         err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
 732         if (!err_detect)
 733                 return IRQ_NONE;
 734
 735         mpc85xx_mc_check(mci);
 736
 737         return IRQ_HANDLED;
 738 }
 739
 740 static void __devinit mpc85xx_init_csrows(struct mem_ctl_info *mci)
 741 {
 742         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
 743         struct csrow_info *csrow;
 744         u32 sdram_ctl;
 745         u32 sdtype;
 746         enum mem_type mtype;
 747         u32 cs_bnds;
 748         int index;
 749
 750         sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
 751
 752         sdtype = sdram_ctl & DSC_SDTYPE_MASK;
 753         if (sdram_ctl & DSC_RD_EN) {
 754                 switch (sdtype) {
 755                 case DSC_SDTYPE_DDR:
 756                         mtype = MEM_RDDR;
 757                         break;
 758                 case DSC_SDTYPE_DDR2:
 759                         mtype = MEM_RDDR2;
 760                         break;
 761                 default:
 762                         mtype = MEM_UNKNOWN;
 763                         break;
 764                 }
 765         } else {
 766                 switch (sdtype) {
 767                 case DSC_SDTYPE_DDR:
 768                         mtype = MEM_DDR;
 769                         break;
 770                 case DSC_SDTYPE_DDR2:
 771                         mtype = MEM_DDR2;
 772                         break;
 773                 default:
 774                         mtype = MEM_UNKNOWN;
 775                         break;
 776                 }
 777         }
 778
 779         for (index = 0; index < mci->nr_csrows; index++) {
 780                 u32 start;
 781                 u32 end;
 782
 783                 csrow = &mci->csrows[index];
 784                 cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 +
 785                                   (index * MPC85XX_MC_CS_BNDS_OFS));
 786                 start = (cs_bnds & 0xfff0000) << 4;
 787                 end = ((cs_bnds & 0xfff) << 20);
 788                 if (start)
 789                         start |= 0xfffff;
 790                 if (end)
 791                         end |= 0xfffff;
 792
 793                 if (start == end)
 794                         continue;       /* not populated */
 795
 796                 csrow->first_page = start >> PAGE_SHIFT;
 797                 csrow->last_page = end >> PAGE_SHIFT;
 798                 csrow->nr_pages = csrow->last_page + 1 - csrow->first_page;
 799                 csrow->grain = 8;
 800                 csrow->mtype = mtype;
 801                 csrow->dtype = DEV_UNKNOWN;
 802                 if (sdram_ctl & DSC_X32_EN)
 803                         csrow->dtype = DEV_X32;
 804                 csrow->edac_mode = EDAC_SECDED;
 805         }
 806 }
 807
 808 static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
 809                                           const struct of_device_id *match)
 810 {
 811         struct mem_ctl_info *mci;
 812         struct mpc85xx_mc_pdata *pdata;
 813         struct resource r;
 814         u32 sdram_ctl;
 815         int res;
 816
 817         if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL))
 818                 return -ENOMEM;
 819
 820         mci = edac_mc_alloc(sizeof(*pdata), 4, 1, edac_mc_idx);
 821         if (!mci) {
 822                 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
 823                 return -ENOMEM;
 824         }
 825
 826         pdata = mci->pvt_info;
 827         pdata->name = "mpc85xx_mc_err";
 828         pdata->irq = NO_IRQ;
 829         mci->dev = &op->dev;
 830         pdata->edac_idx = edac_mc_idx++;
 831         dev_set_drvdata(mci->dev, mci);
 832         mci->ctl_name = pdata->name;
 833         mci->dev_name = pdata->name;
 834
 835         res = of_address_to_resource(op->node, 0, &r);
 836         if (res) {
 837                 printk(KERN_ERR "%s: Unable to get resource for MC err regs\n",
 838                        __func__);
 839                 goto err;
 840         }
 841
 842         if (!devm_request_mem_region(&op->dev, r.start,
 843                                      r.end - r.start + 1, pdata->name)) {
 844                 printk(KERN_ERR "%s: Error while requesting mem region\n",
 845                        __func__);
 846                 res = -EBUSY;
 847                 goto err;
 848         }
 849
 850         pdata->mc_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
 851         if (!pdata->mc_vbase) {
 852                 printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
 853                 res = -ENOMEM;
 854                 goto err;
 855         }
 856
 857         sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
 858         if (!(sdram_ctl & DSC_ECC_EN)) {
 859                 /* no ECC */
 860                 printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
 861                 res = -ENODEV;
 862                 goto err;
 863         }
 864
 865         debugf3("%s(): init mci\n", __func__);
 866         mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 |
 867             MEM_FLAG_DDR | MEM_FLAG_DDR2;
 868         mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
 869         mci->edac_cap = EDAC_FLAG_SECDED;
 870         mci->mod_name = EDAC_MOD_STR;
 871         mci->mod_ver = MPC85XX_REVISION;
 872
 873         if (edac_op_state == EDAC_OPSTATE_POLL)
 874                 mci->edac_check = mpc85xx_mc_check;
 875
 876         mci->ctl_page_to_phys = NULL;
 877
 878         mci->scrub_mode = SCRUB_SW_SRC;
 879
 880         mpc85xx_set_mc_sysfs_attributes(mci);
 881
 882         mpc85xx_init_csrows(mci);
 883
 884 #ifdef CONFIG_EDAC_DEBUG
 885         edac_mc_register_mcidev_debug((struct attribute **)debug_attr);
 886 #endif
 887
 888         /* store the original error disable bits */
 889         orig_ddr_err_disable =
 890             in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE);
 891         out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0);
 892
 893         /* clear all error bits */
 894         out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0);
 895
 896         if (edac_mc_add_mc(mci)) {
 897                 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
 898                 goto err;
 899         }
 900
 901         if (edac_op_state == EDAC_OPSTATE_INT) {
 902                 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN,
 903                          DDR_EIE_MBEE | DDR_EIE_SBEE);
 904
 905                 /* store the original error management threshold */
 906                 orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
 907                                            MPC85XX_MC_ERR_SBE) & 0xff0000;
 908
 909                 /* set threshold to 1 error per interrupt */
 910                 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000);
 911
 912                 /* register interrupts */
 913                 pdata->irq = irq_of_parse_and_map(op->node, 0);
 914                 res = devm_request_irq(&op->dev, pdata->irq,
 915                                        mpc85xx_mc_isr, IRQF_DISABLED,
 916                                        "[EDAC] MC err", mci);
 917                 if (res < 0) {
 918                         printk(KERN_ERR "%s: Unable to request irq %d for "
 919                                "MPC85xx DRAM ERR\n", __func__, pdata->irq);
 920                         irq_dispose_mapping(pdata->irq);
 921                         res = -ENODEV;
 922                         goto err2;
 923                 }
 924
 925                 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n",
 926                        pdata->irq);
 927         }
 928
 929         devres_remove_group(&op->dev, mpc85xx_mc_err_probe);
 930         debugf3("%s(): success\n", __func__);
 931         printk(KERN_INFO EDAC_MOD_STR " MC err registered\n");
 932
 933         return 0;
 934
 935 err2:
 936         edac_mc_del_mc(&op->dev);
 937 err:
 938         devres_release_group(&op->dev, mpc85xx_mc_err_probe);
 939         edac_mc_free(mci);
 940         return res;
 941 }
 942
 943 static int mpc85xx_mc_err_remove(struct of_device *op)
 944 {
 945         struct mem_ctl_info *mci = dev_get_drvdata(&op->dev);
 946         struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
 947
 948         debugf0("%s()\n", __func__);
 949
 950         if (edac_op_state == EDAC_OPSTATE_INT) {
 951                 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0);
 952                 irq_dispose_mapping(pdata->irq);
 953         }
 954
 955         out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE,
 956                  orig_ddr_err_disable);
 957         out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe);
 958
 959         edac_mc_del_mc(&op->dev);
 960         edac_mc_free(mci);
 961         return 0;
 962 }
 963
 964 static struct of_device_id mpc85xx_mc_err_of_match[] = {
 965         {
 966          .compatible = "fsl,8540-memory-controller",
 967          },
 968         {
 969          .compatible = "fsl,8541-memory-controller",
 970          },
 971         {
 972          .compatible = "fsl,8544-memory-controller",
 973          },
 974         {
 975          .compatible = "fsl,8548-memory-controller",
 976          },
 977         {
 978          .compatible = "fsl,8555-memory-controller",
 979          },
 980         {
 981          .compatible = "fsl,8568-memory-controller",
 982          },
 983         {},
 984 };
 985
 986 static struct of_platform_driver mpc85xx_mc_err_driver = {
 987         .owner = THIS_MODULE,
 988         .name = "mpc85xx_mc_err",
 989         .match_table = mpc85xx_mc_err_of_match,
 990         .probe = mpc85xx_mc_err_probe,
 991         .remove = mpc85xx_mc_err_remove,
 992         .driver = {
 993                    .name = "mpc85xx_mc_err",
 994                    .owner = THIS_MODULE,
 995                    },
 996 };
 997
 998 static int __init mpc85xx_mc_init(void)
 999 {
1000         int res = 0;
1001
1002         printk(KERN_INFO "Freescale(R) MPC85xx EDAC driver, "
1003                "(C) 2006 Montavista Software\n");
1004
1005         /* make sure error reporting method is sane */
1006         switch (edac_op_state) {
1007         case EDAC_OPSTATE_POLL:
1008         case EDAC_OPSTATE_INT:
1009                 break;
1010         default:
1011                 edac_op_state = EDAC_OPSTATE_INT;
1012                 break;
1013         }
1014
1015         res = of_register_platform_driver(&mpc85xx_mc_err_driver);
1016         if (res)
1017                 printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n");
1018
1019         res = of_register_platform_driver(&mpc85xx_l2_err_driver);
1020         if (res)
1021                 printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n");
1022
1023 #ifdef CONFIG_PCI
1024         res = of_register_platform_driver(&mpc85xx_pci_err_driver);
1025         if (res)
1026                 printk(KERN_WARNING EDAC_MOD_STR "PCI fails to register\n");
1027 #endif
1028
1029         /*
1030          * need to clear HID1[RFXE] to disable machine check int
1031          * so we can catch it
1032          */
1033         if (edac_op_state == EDAC_OPSTATE_INT) {
1034                 orig_hid1 = mfspr(SPRN_HID1);
1035                 mtspr(SPRN_HID1, (orig_hid1 & ~0x20000));
1036         }
1037
1038         return 0;
1039 }
1040
1041 module_init(mpc85xx_mc_init);
1042
1043 static void __exit mpc85xx_mc_exit(void)
1044 {
1045         mtspr(SPRN_HID1, orig_hid1);
1046 #ifdef CONFIG_PCI
1047         of_unregister_platform_driver(&mpc85xx_pci_err_driver);
1048 #endif
1049         of_unregister_platform_driver(&mpc85xx_l2_err_driver);
1050         of_unregister_platform_driver(&mpc85xx_mc_err_driver);
1051 }
1052
1053 module_exit(mpc85xx_mc_exit);
1054
1055 MODULE_LICENSE("GPL");
1056 MODULE_AUTHOR("Montavista Software, Inc.");
1057 module_param(edac_op_state, int, 0444);
1058 MODULE_PARM_DESC(edac_op_state,
1059                  "EDAC Error Reporting state: 0=Poll, 2=Interrupt");