2 * Freescale MPC85xx Memory Controller kenel module
4 * Author: Dave Jiang <djiang@mvista.com>
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
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>
18 #include <linux/mod_devicetable.h>
19 #include <linux/edac.h>
20 #include <linux/smp.h>
22 #include <linux/of_platform.h>
23 #include <linux/of_device.h>
24 #include "edac_module.h"
25 #include "edac_core.h"
26 #include "mpc85xx_edac.h"
28 static int edac_dev_idx;
30 static int edac_pci_idx;
32 static int edac_mc_idx;
34 static u32 orig_ddr_err_disable;
35 static u32 orig_ddr_err_sbe;
41 static u32 orig_pci_err_cap_dr;
42 static u32 orig_pci_err_en;
45 static u32 orig_l2_err_disable;
47 static u32 orig_hid1[2];
50 /************************ MC SYSFS parts ***********************************/
52 static ssize_t mpc85xx_mc_inject_data_hi_show(struct mem_ctl_info *mci,
55 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
56 return sprintf(data, "0x%08x",
57 in_be32(pdata->mc_vbase +
58 MPC85XX_MC_DATA_ERR_INJECT_HI));
61 static ssize_t mpc85xx_mc_inject_data_lo_show(struct mem_ctl_info *mci,
64 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
65 return sprintf(data, "0x%08x",
66 in_be32(pdata->mc_vbase +
67 MPC85XX_MC_DATA_ERR_INJECT_LO));
70 static ssize_t mpc85xx_mc_inject_ctrl_show(struct mem_ctl_info *mci, char *data)
72 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
73 return sprintf(data, "0x%08x",
74 in_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT));
77 static ssize_t mpc85xx_mc_inject_data_hi_store(struct mem_ctl_info *mci,
78 const char *data, size_t count)
80 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
82 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_HI,
83 simple_strtoul(data, NULL, 0));
89 static ssize_t mpc85xx_mc_inject_data_lo_store(struct mem_ctl_info *mci,
90 const char *data, size_t count)
92 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
94 out_be32(pdata->mc_vbase + MPC85XX_MC_DATA_ERR_INJECT_LO,
95 simple_strtoul(data, NULL, 0));
101 static ssize_t mpc85xx_mc_inject_ctrl_store(struct mem_ctl_info *mci,
102 const char *data, size_t count)
104 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
105 if (isdigit(*data)) {
106 out_be32(pdata->mc_vbase + MPC85XX_MC_ECC_ERR_INJECT,
107 simple_strtoul(data, NULL, 0));
113 static struct mcidev_sysfs_attribute mpc85xx_mc_sysfs_attributes[] = {
116 .name = "inject_data_hi",
117 .mode = (S_IRUGO | S_IWUSR)
119 .show = mpc85xx_mc_inject_data_hi_show,
120 .store = mpc85xx_mc_inject_data_hi_store},
123 .name = "inject_data_lo",
124 .mode = (S_IRUGO | S_IWUSR)
126 .show = mpc85xx_mc_inject_data_lo_show,
127 .store = mpc85xx_mc_inject_data_lo_store},
130 .name = "inject_ctrl",
131 .mode = (S_IRUGO | S_IWUSR)
133 .show = mpc85xx_mc_inject_ctrl_show,
134 .store = mpc85xx_mc_inject_ctrl_store},
138 .attr = {.name = NULL}
142 static void mpc85xx_set_mc_sysfs_attributes(struct mem_ctl_info *mci)
144 mci->mc_driver_sysfs_attributes = mpc85xx_mc_sysfs_attributes;
147 /**************************** PCI Err device ***************************/
150 static void mpc85xx_pci_check(struct edac_pci_ctl_info *pci)
152 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
155 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
157 /* master aborts can happen during PCI config cycles */
158 if (!(err_detect & ~(PCI_EDE_MULTI_ERR | PCI_EDE_MST_ABRT))) {
159 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
163 printk(KERN_ERR "PCI error(s) detected\n");
164 printk(KERN_ERR "PCI/X ERR_DR register: %#08x\n", err_detect);
166 printk(KERN_ERR "PCI/X ERR_ATTRIB register: %#08x\n",
167 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ATTRIB));
168 printk(KERN_ERR "PCI/X ERR_ADDR register: %#08x\n",
169 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_ADDR));
170 printk(KERN_ERR "PCI/X ERR_EXT_ADDR register: %#08x\n",
171 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EXT_ADDR));
172 printk(KERN_ERR "PCI/X ERR_DL register: %#08x\n",
173 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DL));
174 printk(KERN_ERR "PCI/X ERR_DH register: %#08x\n",
175 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DH));
177 /* clear error bits */
178 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, err_detect);
180 if (err_detect & PCI_EDE_PERR_MASK)
181 edac_pci_handle_pe(pci, pci->ctl_name);
183 if ((err_detect & ~PCI_EDE_MULTI_ERR) & ~PCI_EDE_PERR_MASK)
184 edac_pci_handle_npe(pci, pci->ctl_name);
187 static irqreturn_t mpc85xx_pci_isr(int irq, void *dev_id)
189 struct edac_pci_ctl_info *pci = dev_id;
190 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
193 err_detect = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR);
198 mpc85xx_pci_check(pci);
203 static int __devinit mpc85xx_pci_err_probe(struct of_device *op,
204 const struct of_device_id *match)
206 struct edac_pci_ctl_info *pci;
207 struct mpc85xx_pci_pdata *pdata;
211 if (!devres_open_group(&op->dev, mpc85xx_pci_err_probe, GFP_KERNEL))
214 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mpc85xx_pci_err");
218 pdata = pci->pvt_info;
219 pdata->name = "mpc85xx_pci_err";
221 dev_set_drvdata(&op->dev, pci);
223 pci->mod_name = EDAC_MOD_STR;
224 pci->ctl_name = pdata->name;
225 pci->dev_name = dev_name(&op->dev);
227 if (edac_op_state == EDAC_OPSTATE_POLL)
228 pci->edac_check = mpc85xx_pci_check;
230 pdata->edac_idx = edac_pci_idx++;
232 res = of_address_to_resource(op->node, 0, &r);
234 printk(KERN_ERR "%s: Unable to get resource for "
235 "PCI err regs\n", __func__);
239 /* we only need the error registers */
242 if (!devm_request_mem_region(&op->dev, r.start, resource_size(&r),
244 printk(KERN_ERR "%s: Error while requesting mem region\n",
250 pdata->pci_vbase = devm_ioremap(&op->dev, r.start, resource_size(&r));
251 if (!pdata->pci_vbase) {
252 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
257 orig_pci_err_cap_dr =
258 in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR);
260 /* PCI master abort is expected during config cycles */
261 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR, 0x40);
263 orig_pci_err_en = in_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN);
265 /* disable master abort reporting */
266 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, ~0x40);
268 /* clear error bits */
269 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_DR, ~0);
271 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
272 debugf3("%s(): failed edac_pci_add_device()\n", __func__);
276 if (edac_op_state == EDAC_OPSTATE_INT) {
277 pdata->irq = irq_of_parse_and_map(op->node, 0);
278 res = devm_request_irq(&op->dev, pdata->irq,
279 mpc85xx_pci_isr, IRQF_DISABLED,
280 "[EDAC] PCI err", pci);
283 "%s: Unable to requiest irq %d for "
284 "MPC85xx PCI err\n", __func__, pdata->irq);
285 irq_dispose_mapping(pdata->irq);
290 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
294 devres_remove_group(&op->dev, mpc85xx_pci_err_probe);
295 debugf3("%s(): success\n", __func__);
296 printk(KERN_INFO EDAC_MOD_STR " PCI err registered\n");
301 edac_pci_del_device(&op->dev);
303 edac_pci_free_ctl_info(pci);
304 devres_release_group(&op->dev, mpc85xx_pci_err_probe);
308 static int mpc85xx_pci_err_remove(struct of_device *op)
310 struct edac_pci_ctl_info *pci = dev_get_drvdata(&op->dev);
311 struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
313 debugf0("%s()\n", __func__);
315 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_CAP_DR,
316 orig_pci_err_cap_dr);
318 out_be32(pdata->pci_vbase + MPC85XX_PCI_ERR_EN, orig_pci_err_en);
320 edac_pci_del_device(pci->dev);
322 if (edac_op_state == EDAC_OPSTATE_INT)
323 irq_dispose_mapping(pdata->irq);
325 edac_pci_free_ctl_info(pci);
330 static struct of_device_id mpc85xx_pci_err_of_match[] = {
332 .compatible = "fsl,mpc8540-pcix",
335 .compatible = "fsl,mpc8540-pci",
340 static struct of_platform_driver mpc85xx_pci_err_driver = {
341 .owner = THIS_MODULE,
342 .name = "mpc85xx_pci_err",
343 .match_table = mpc85xx_pci_err_of_match,
344 .probe = mpc85xx_pci_err_probe,
345 .remove = __devexit_p(mpc85xx_pci_err_remove),
347 .name = "mpc85xx_pci_err",
348 .owner = THIS_MODULE,
352 #endif /* CONFIG_PCI */
354 /**************************** L2 Err device ***************************/
356 /************************ L2 SYSFS parts ***********************************/
358 static ssize_t mpc85xx_l2_inject_data_hi_show(struct edac_device_ctl_info
359 *edac_dev, char *data)
361 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
362 return sprintf(data, "0x%08x",
363 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI));
366 static ssize_t mpc85xx_l2_inject_data_lo_show(struct edac_device_ctl_info
367 *edac_dev, char *data)
369 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
370 return sprintf(data, "0x%08x",
371 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO));
374 static ssize_t mpc85xx_l2_inject_ctrl_show(struct edac_device_ctl_info
375 *edac_dev, char *data)
377 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
378 return sprintf(data, "0x%08x",
379 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL));
382 static ssize_t mpc85xx_l2_inject_data_hi_store(struct edac_device_ctl_info
383 *edac_dev, const char *data,
386 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
387 if (isdigit(*data)) {
388 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJHI,
389 simple_strtoul(data, NULL, 0));
395 static ssize_t mpc85xx_l2_inject_data_lo_store(struct edac_device_ctl_info
396 *edac_dev, const char *data,
399 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
400 if (isdigit(*data)) {
401 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJLO,
402 simple_strtoul(data, NULL, 0));
408 static ssize_t mpc85xx_l2_inject_ctrl_store(struct edac_device_ctl_info
409 *edac_dev, const char *data,
412 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
413 if (isdigit(*data)) {
414 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINJCTL,
415 simple_strtoul(data, NULL, 0));
421 static struct edac_dev_sysfs_attribute mpc85xx_l2_sysfs_attributes[] = {
424 .name = "inject_data_hi",
425 .mode = (S_IRUGO | S_IWUSR)
427 .show = mpc85xx_l2_inject_data_hi_show,
428 .store = mpc85xx_l2_inject_data_hi_store},
431 .name = "inject_data_lo",
432 .mode = (S_IRUGO | S_IWUSR)
434 .show = mpc85xx_l2_inject_data_lo_show,
435 .store = mpc85xx_l2_inject_data_lo_store},
438 .name = "inject_ctrl",
439 .mode = (S_IRUGO | S_IWUSR)
441 .show = mpc85xx_l2_inject_ctrl_show,
442 .store = mpc85xx_l2_inject_ctrl_store},
446 .attr = {.name = NULL}
450 static void mpc85xx_set_l2_sysfs_attributes(struct edac_device_ctl_info
453 edac_dev->sysfs_attributes = mpc85xx_l2_sysfs_attributes;
456 /***************************** L2 ops ***********************************/
458 static void mpc85xx_l2_check(struct edac_device_ctl_info *edac_dev)
460 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
463 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
465 if (!(err_detect & L2_EDE_MASK))
468 printk(KERN_ERR "ECC Error in CPU L2 cache\n");
469 printk(KERN_ERR "L2 Error Detect Register: 0x%08x\n", err_detect);
470 printk(KERN_ERR "L2 Error Capture Data High Register: 0x%08x\n",
471 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATAHI));
472 printk(KERN_ERR "L2 Error Capture Data Lo Register: 0x%08x\n",
473 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTDATALO));
474 printk(KERN_ERR "L2 Error Syndrome Register: 0x%08x\n",
475 in_be32(pdata->l2_vbase + MPC85XX_L2_CAPTECC));
476 printk(KERN_ERR "L2 Error Attributes Capture Register: 0x%08x\n",
477 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRATTR));
478 printk(KERN_ERR "L2 Error Address Capture Register: 0x%08x\n",
479 in_be32(pdata->l2_vbase + MPC85XX_L2_ERRADDR));
481 /* clear error detect register */
482 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, err_detect);
484 if (err_detect & L2_EDE_CE_MASK)
485 edac_device_handle_ce(edac_dev, 0, 0, edac_dev->ctl_name);
487 if (err_detect & L2_EDE_UE_MASK)
488 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
491 static irqreturn_t mpc85xx_l2_isr(int irq, void *dev_id)
493 struct edac_device_ctl_info *edac_dev = dev_id;
494 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
497 err_detect = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET);
499 if (!(err_detect & L2_EDE_MASK))
502 mpc85xx_l2_check(edac_dev);
507 static int __devinit mpc85xx_l2_err_probe(struct of_device *op,
508 const struct of_device_id *match)
510 struct edac_device_ctl_info *edac_dev;
511 struct mpc85xx_l2_pdata *pdata;
515 if (!devres_open_group(&op->dev, mpc85xx_l2_err_probe, GFP_KERNEL))
518 edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
519 "cpu", 1, "L", 1, 2, NULL, 0,
522 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
526 pdata = edac_dev->pvt_info;
527 pdata->name = "mpc85xx_l2_err";
529 edac_dev->dev = &op->dev;
530 dev_set_drvdata(edac_dev->dev, edac_dev);
531 edac_dev->ctl_name = pdata->name;
532 edac_dev->dev_name = pdata->name;
534 res = of_address_to_resource(op->node, 0, &r);
536 printk(KERN_ERR "%s: Unable to get resource for "
537 "L2 err regs\n", __func__);
541 /* we only need the error registers */
544 if (!devm_request_mem_region(&op->dev, r.start,
545 r.end - r.start + 1, pdata->name)) {
546 printk(KERN_ERR "%s: Error while requesting mem region\n",
552 pdata->l2_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
553 if (!pdata->l2_vbase) {
554 printk(KERN_ERR "%s: Unable to setup L2 err regs\n", __func__);
559 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDET, ~0);
561 orig_l2_err_disable = in_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS);
563 /* clear the err_dis */
564 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, 0);
566 edac_dev->mod_name = EDAC_MOD_STR;
568 if (edac_op_state == EDAC_OPSTATE_POLL)
569 edac_dev->edac_check = mpc85xx_l2_check;
571 mpc85xx_set_l2_sysfs_attributes(edac_dev);
573 pdata->edac_idx = edac_dev_idx++;
575 if (edac_device_add_device(edac_dev) > 0) {
576 debugf3("%s(): failed edac_device_add_device()\n", __func__);
580 if (edac_op_state == EDAC_OPSTATE_INT) {
581 pdata->irq = irq_of_parse_and_map(op->node, 0);
582 res = devm_request_irq(&op->dev, pdata->irq,
583 mpc85xx_l2_isr, IRQF_DISABLED,
584 "[EDAC] L2 err", edac_dev);
587 "%s: Unable to requiest irq %d for "
588 "MPC85xx L2 err\n", __func__, pdata->irq);
589 irq_dispose_mapping(pdata->irq);
594 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for L2 Err\n",
597 edac_dev->op_state = OP_RUNNING_INTERRUPT;
599 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, L2_EIE_MASK);
602 devres_remove_group(&op->dev, mpc85xx_l2_err_probe);
604 debugf3("%s(): success\n", __func__);
605 printk(KERN_INFO EDAC_MOD_STR " L2 err registered\n");
610 edac_device_del_device(&op->dev);
612 devres_release_group(&op->dev, mpc85xx_l2_err_probe);
613 edac_device_free_ctl_info(edac_dev);
617 static int mpc85xx_l2_err_remove(struct of_device *op)
619 struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
620 struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
622 debugf0("%s()\n", __func__);
624 if (edac_op_state == EDAC_OPSTATE_INT) {
625 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRINTEN, 0);
626 irq_dispose_mapping(pdata->irq);
629 out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
630 edac_device_del_device(&op->dev);
631 edac_device_free_ctl_info(edac_dev);
635 static struct of_device_id mpc85xx_l2_err_of_match[] = {
636 /* deprecate the fsl,85.. forms in the future, 2.6.30? */
637 { .compatible = "fsl,8540-l2-cache-controller", },
638 { .compatible = "fsl,8541-l2-cache-controller", },
639 { .compatible = "fsl,8544-l2-cache-controller", },
640 { .compatible = "fsl,8548-l2-cache-controller", },
641 { .compatible = "fsl,8555-l2-cache-controller", },
642 { .compatible = "fsl,8568-l2-cache-controller", },
643 { .compatible = "fsl,mpc8536-l2-cache-controller", },
644 { .compatible = "fsl,mpc8540-l2-cache-controller", },
645 { .compatible = "fsl,mpc8541-l2-cache-controller", },
646 { .compatible = "fsl,mpc8544-l2-cache-controller", },
647 { .compatible = "fsl,mpc8548-l2-cache-controller", },
648 { .compatible = "fsl,mpc8555-l2-cache-controller", },
649 { .compatible = "fsl,mpc8560-l2-cache-controller", },
650 { .compatible = "fsl,mpc8568-l2-cache-controller", },
651 { .compatible = "fsl,mpc8572-l2-cache-controller", },
652 { .compatible = "fsl,p2020-l2-cache-controller", },
656 static struct of_platform_driver mpc85xx_l2_err_driver = {
657 .owner = THIS_MODULE,
658 .name = "mpc85xx_l2_err",
659 .match_table = mpc85xx_l2_err_of_match,
660 .probe = mpc85xx_l2_err_probe,
661 .remove = mpc85xx_l2_err_remove,
663 .name = "mpc85xx_l2_err",
664 .owner = THIS_MODULE,
668 /**************************** MC Err device ***************************/
671 * Taken from table 8-55 in the MPC8641 User's Manual and/or 9-61 in the
672 * MPC8572 User's Manual. Each line represents a syndrome bit column as a
673 * 64-bit value, but split into an upper and lower 32-bit chunk. The labels
674 * below correspond to Freescale's manuals.
676 static unsigned int ecc_table[16] = {
679 0xf00fe11e, 0xc33c0ff7, /* Syndrome bit 7 */
680 0x00ff00ff, 0x00fff0ff,
681 0x0f0f0f0f, 0x0f0fff00,
682 0x11113333, 0x7777000f,
683 0x22224444, 0x8888222f,
684 0x44448888, 0xffff4441,
685 0x8888ffff, 0x11118882,
686 0xffff1111, 0x22221114, /* Syndrome bit 0 */
690 * Calculate the correct ECC value for a 64-bit value specified by high:low
692 static u8 calculate_ecc(u32 high, u32 low)
701 for (i = 0; i < 8; i++) {
702 mask_high = ecc_table[i * 2];
703 mask_low = ecc_table[i * 2 + 1];
706 for (j = 0; j < 32; j++) {
707 if ((mask_high >> j) & 1)
708 bit_cnt ^= (high >> j) & 1;
709 if ((mask_low >> j) & 1)
710 bit_cnt ^= (low >> j) & 1;
720 * Create the syndrome code which is generated if the data line specified by
721 * 'bit' failed. Eg generate an 8-bit codes seen in Table 8-55 in the MPC8641
722 * User's Manual and 9-61 in the MPC8572 User's Manual.
724 static u8 syndrome_from_bit(unsigned int bit) {
729 * Cycle through the upper or lower 32-bit portion of each value in
730 * ecc_table depending on if 'bit' is in the upper or lower half of
733 for (i = bit < 32; i < 16; i += 2)
734 syndrome |= ((ecc_table[i] >> (bit % 32)) & 1) << (i / 2);
740 * Decode data and ecc syndrome to determine what went wrong
741 * Note: This can only decode single-bit errors
743 static void sbe_ecc_decode(u32 cap_high, u32 cap_low, u32 cap_ecc,
744 int *bad_data_bit, int *bad_ecc_bit)
753 * Calculate the ECC of the captured data and XOR it with the captured
754 * ECC to find an ECC syndrome value we can search for
756 syndrome = calculate_ecc(cap_high, cap_low) ^ cap_ecc;
758 /* Check if a data line is stuck... */
759 for (i = 0; i < 64; i++) {
760 if (syndrome == syndrome_from_bit(i)) {
766 /* If data is correct, check ECC bits for errors... */
767 for (i = 0; i < 8; i++) {
768 if ((syndrome >> i) & 0x1) {
775 static void mpc85xx_mc_check(struct mem_ctl_info *mci)
777 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
778 struct csrow_info *csrow;
790 err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
794 mpc85xx_mc_printk(mci, KERN_ERR, "Err Detect Register: %#8.8x\n",
797 /* no more processing if not ECC bit errors */
798 if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) {
799 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
803 syndrome = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ECC);
805 /* Mask off appropriate bits of syndrome based on bus width */
806 bus_width = (in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG) &
807 DSC_DBW_MASK) ? 32 : 64;
813 err_addr = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_ADDRESS);
814 pfn = err_addr >> PAGE_SHIFT;
816 for (row_index = 0; row_index < mci->nr_csrows; row_index++) {
817 csrow = &mci->csrows[row_index];
818 if ((pfn >= csrow->first_page) && (pfn <= csrow->last_page))
822 cap_high = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_DATA_HI);
823 cap_low = in_be32(pdata->mc_vbase + MPC85XX_MC_CAPTURE_DATA_LO);
826 * Analyze single-bit errors on 64-bit wide buses
827 * TODO: Add support for 32-bit wide buses
829 if ((err_detect & DDR_EDE_SBE) && (bus_width == 64)) {
830 sbe_ecc_decode(cap_high, cap_low, syndrome,
831 &bad_data_bit, &bad_ecc_bit);
833 if (bad_data_bit != -1)
834 mpc85xx_mc_printk(mci, KERN_ERR,
835 "Faulty Data bit: %d\n", bad_data_bit);
836 if (bad_ecc_bit != -1)
837 mpc85xx_mc_printk(mci, KERN_ERR,
838 "Faulty ECC bit: %d\n", bad_ecc_bit);
840 mpc85xx_mc_printk(mci, KERN_ERR,
841 "Expected Data / ECC:\t%#8.8x_%08x / %#2.2x\n",
842 cap_high ^ (1 << (bad_data_bit - 32)),
843 cap_low ^ (1 << bad_data_bit),
844 syndrome ^ (1 << bad_ecc_bit));
847 mpc85xx_mc_printk(mci, KERN_ERR,
848 "Captured Data / ECC:\t%#8.8x_%08x / %#2.2x\n",
849 cap_high, cap_low, syndrome);
850 mpc85xx_mc_printk(mci, KERN_ERR, "Err addr: %#8.8x\n", err_addr);
851 mpc85xx_mc_printk(mci, KERN_ERR, "PFN: %#8.8x\n", pfn);
853 /* we are out of range */
854 if (row_index == mci->nr_csrows)
855 mpc85xx_mc_printk(mci, KERN_ERR, "PFN out of range!\n");
857 if (err_detect & DDR_EDE_SBE)
858 edac_mc_handle_ce(mci, pfn, err_addr & PAGE_MASK,
859 syndrome, row_index, 0, mci->ctl_name);
861 if (err_detect & DDR_EDE_MBE)
862 edac_mc_handle_ue(mci, pfn, err_addr & PAGE_MASK,
863 row_index, mci->ctl_name);
865 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, err_detect);
868 static irqreturn_t mpc85xx_mc_isr(int irq, void *dev_id)
870 struct mem_ctl_info *mci = dev_id;
871 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
874 err_detect = in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT);
878 mpc85xx_mc_check(mci);
883 static void __devinit mpc85xx_init_csrows(struct mem_ctl_info *mci)
885 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
886 struct csrow_info *csrow;
893 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
895 sdtype = sdram_ctl & DSC_SDTYPE_MASK;
896 if (sdram_ctl & DSC_RD_EN) {
901 case DSC_SDTYPE_DDR2:
904 case DSC_SDTYPE_DDR3:
916 case DSC_SDTYPE_DDR2:
919 case DSC_SDTYPE_DDR3:
928 for (index = 0; index < mci->nr_csrows; index++) {
932 csrow = &mci->csrows[index];
933 cs_bnds = in_be32(pdata->mc_vbase + MPC85XX_MC_CS_BNDS_0 +
934 (index * MPC85XX_MC_CS_BNDS_OFS));
936 start = (cs_bnds & 0xffff0000) >> 16;
937 end = (cs_bnds & 0x0000ffff);
940 continue; /* not populated */
942 start <<= (24 - PAGE_SHIFT);
943 end <<= (24 - PAGE_SHIFT);
944 end |= (1 << (24 - PAGE_SHIFT)) - 1;
946 csrow->first_page = start;
947 csrow->last_page = end;
948 csrow->nr_pages = end + 1 - start;
950 csrow->mtype = mtype;
951 csrow->dtype = DEV_UNKNOWN;
952 if (sdram_ctl & DSC_X32_EN)
953 csrow->dtype = DEV_X32;
954 csrow->edac_mode = EDAC_SECDED;
958 static int __devinit mpc85xx_mc_err_probe(struct of_device *op,
959 const struct of_device_id *match)
961 struct mem_ctl_info *mci;
962 struct mpc85xx_mc_pdata *pdata;
967 if (!devres_open_group(&op->dev, mpc85xx_mc_err_probe, GFP_KERNEL))
970 mci = edac_mc_alloc(sizeof(*pdata), 4, 1, edac_mc_idx);
972 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
976 pdata = mci->pvt_info;
977 pdata->name = "mpc85xx_mc_err";
980 pdata->edac_idx = edac_mc_idx++;
981 dev_set_drvdata(mci->dev, mci);
982 mci->ctl_name = pdata->name;
983 mci->dev_name = pdata->name;
985 res = of_address_to_resource(op->node, 0, &r);
987 printk(KERN_ERR "%s: Unable to get resource for MC err regs\n",
992 if (!devm_request_mem_region(&op->dev, r.start,
993 r.end - r.start + 1, pdata->name)) {
994 printk(KERN_ERR "%s: Error while requesting mem region\n",
1000 pdata->mc_vbase = devm_ioremap(&op->dev, r.start, r.end - r.start + 1);
1001 if (!pdata->mc_vbase) {
1002 printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
1007 sdram_ctl = in_be32(pdata->mc_vbase + MPC85XX_MC_DDR_SDRAM_CFG);
1008 if (!(sdram_ctl & DSC_ECC_EN)) {
1010 printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
1015 debugf3("%s(): init mci\n", __func__);
1016 mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_RDDR2 |
1017 MEM_FLAG_DDR | MEM_FLAG_DDR2;
1018 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
1019 mci->edac_cap = EDAC_FLAG_SECDED;
1020 mci->mod_name = EDAC_MOD_STR;
1021 mci->mod_ver = MPC85XX_REVISION;
1023 if (edac_op_state == EDAC_OPSTATE_POLL)
1024 mci->edac_check = mpc85xx_mc_check;
1026 mci->ctl_page_to_phys = NULL;
1028 mci->scrub_mode = SCRUB_SW_SRC;
1030 mpc85xx_set_mc_sysfs_attributes(mci);
1032 mpc85xx_init_csrows(mci);
1034 /* store the original error disable bits */
1035 orig_ddr_err_disable =
1036 in_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE);
1037 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE, 0);
1039 /* clear all error bits */
1040 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DETECT, ~0);
1042 if (edac_mc_add_mc(mci)) {
1043 debugf3("%s(): failed edac_mc_add_mc()\n", __func__);
1047 if (edac_op_state == EDAC_OPSTATE_INT) {
1048 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN,
1049 DDR_EIE_MBEE | DDR_EIE_SBEE);
1051 /* store the original error management threshold */
1052 orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
1053 MPC85XX_MC_ERR_SBE) & 0xff0000;
1055 /* set threshold to 1 error per interrupt */
1056 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, 0x10000);
1058 /* register interrupts */
1059 pdata->irq = irq_of_parse_and_map(op->node, 0);
1060 res = devm_request_irq(&op->dev, pdata->irq,
1062 IRQF_DISABLED | IRQF_SHARED,
1063 "[EDAC] MC err", mci);
1065 printk(KERN_ERR "%s: Unable to request irq %d for "
1066 "MPC85xx DRAM ERR\n", __func__, pdata->irq);
1067 irq_dispose_mapping(pdata->irq);
1072 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC\n",
1076 devres_remove_group(&op->dev, mpc85xx_mc_err_probe);
1077 debugf3("%s(): success\n", __func__);
1078 printk(KERN_INFO EDAC_MOD_STR " MC err registered\n");
1083 edac_mc_del_mc(&op->dev);
1085 devres_release_group(&op->dev, mpc85xx_mc_err_probe);
1090 static int mpc85xx_mc_err_remove(struct of_device *op)
1092 struct mem_ctl_info *mci = dev_get_drvdata(&op->dev);
1093 struct mpc85xx_mc_pdata *pdata = mci->pvt_info;
1095 debugf0("%s()\n", __func__);
1097 if (edac_op_state == EDAC_OPSTATE_INT) {
1098 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_INT_EN, 0);
1099 irq_dispose_mapping(pdata->irq);
1102 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_DISABLE,
1103 orig_ddr_err_disable);
1104 out_be32(pdata->mc_vbase + MPC85XX_MC_ERR_SBE, orig_ddr_err_sbe);
1106 edac_mc_del_mc(&op->dev);
1111 static struct of_device_id mpc85xx_mc_err_of_match[] = {
1112 /* deprecate the fsl,85.. forms in the future, 2.6.30? */
1113 { .compatible = "fsl,8540-memory-controller", },
1114 { .compatible = "fsl,8541-memory-controller", },
1115 { .compatible = "fsl,8544-memory-controller", },
1116 { .compatible = "fsl,8548-memory-controller", },
1117 { .compatible = "fsl,8555-memory-controller", },
1118 { .compatible = "fsl,8568-memory-controller", },
1119 { .compatible = "fsl,mpc8536-memory-controller", },
1120 { .compatible = "fsl,mpc8540-memory-controller", },
1121 { .compatible = "fsl,mpc8541-memory-controller", },
1122 { .compatible = "fsl,mpc8544-memory-controller", },
1123 { .compatible = "fsl,mpc8548-memory-controller", },
1124 { .compatible = "fsl,mpc8555-memory-controller", },
1125 { .compatible = "fsl,mpc8560-memory-controller", },
1126 { .compatible = "fsl,mpc8568-memory-controller", },
1127 { .compatible = "fsl,mpc8572-memory-controller", },
1128 { .compatible = "fsl,mpc8349-memory-controller", },
1129 { .compatible = "fsl,p2020-memory-controller", },
1133 static struct of_platform_driver mpc85xx_mc_err_driver = {
1134 .owner = THIS_MODULE,
1135 .name = "mpc85xx_mc_err",
1136 .match_table = mpc85xx_mc_err_of_match,
1137 .probe = mpc85xx_mc_err_probe,
1138 .remove = mpc85xx_mc_err_remove,
1140 .name = "mpc85xx_mc_err",
1141 .owner = THIS_MODULE,
1145 #ifdef CONFIG_MPC85xx
1146 static void __init mpc85xx_mc_clear_rfxe(void *data)
1148 orig_hid1[smp_processor_id()] = mfspr(SPRN_HID1);
1149 mtspr(SPRN_HID1, (orig_hid1[smp_processor_id()] & ~0x20000));
1153 static int __init mpc85xx_mc_init(void)
1157 printk(KERN_INFO "Freescale(R) MPC85xx EDAC driver, "
1158 "(C) 2006 Montavista Software\n");
1160 /* make sure error reporting method is sane */
1161 switch (edac_op_state) {
1162 case EDAC_OPSTATE_POLL:
1163 case EDAC_OPSTATE_INT:
1166 edac_op_state = EDAC_OPSTATE_INT;
1170 res = of_register_platform_driver(&mpc85xx_mc_err_driver);
1172 printk(KERN_WARNING EDAC_MOD_STR "MC fails to register\n");
1174 res = of_register_platform_driver(&mpc85xx_l2_err_driver);
1176 printk(KERN_WARNING EDAC_MOD_STR "L2 fails to register\n");
1179 res = of_register_platform_driver(&mpc85xx_pci_err_driver);
1181 printk(KERN_WARNING EDAC_MOD_STR "PCI fails to register\n");
1184 #ifdef CONFIG_MPC85xx
1186 * need to clear HID1[RFXE] to disable machine check int
1187 * so we can catch it
1189 if (edac_op_state == EDAC_OPSTATE_INT)
1190 on_each_cpu(mpc85xx_mc_clear_rfxe, NULL, 0);
1196 module_init(mpc85xx_mc_init);
1198 #ifdef CONFIG_MPC85xx
1199 static void __exit mpc85xx_mc_restore_hid1(void *data)
1201 mtspr(SPRN_HID1, orig_hid1[smp_processor_id()]);
1205 static void __exit mpc85xx_mc_exit(void)
1207 #ifdef CONFIG_MPC85xx
1208 on_each_cpu(mpc85xx_mc_restore_hid1, NULL, 0);
1211 of_unregister_platform_driver(&mpc85xx_pci_err_driver);
1213 of_unregister_platform_driver(&mpc85xx_l2_err_driver);
1214 of_unregister_platform_driver(&mpc85xx_mc_err_driver);
1217 module_exit(mpc85xx_mc_exit);
1219 MODULE_LICENSE("GPL");
1220 MODULE_AUTHOR("Montavista Software, Inc.");
1221 module_param(edac_op_state, int, 0444);
1222 MODULE_PARM_DESC(edac_op_state,
1223 "EDAC Error Reporting state: 0=Poll, 2=Interrupt");