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sched: Fix schedule_tail() to disable preemption
[linux/fpc-iii.git] / drivers / edac / mv64x60_edac.c
blob542fad70e360d60f7c51c7db8f39ab9dc3de9038
1 /*
2 * Marvell MV64x60 Memory Controller kernel module for PPC platforms
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
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/interrupt.h>
16 #include <linux/io.h>
17 #include <linux/edac.h>
18 #include <linux/gfp.h>
19
20 #include "edac_core.h"
21 #include "edac_module.h"
22 #include "mv64x60_edac.h"
23
24 static const char *mv64x60_ctl_name = "MV64x60";
25 static int edac_dev_idx;
26 static int edac_pci_idx;
27 static int edac_mc_idx;
28
29 /*********************** PCI err device **********************************/
30 #ifdef CONFIG_PCI
31 static void mv64x60_pci_check(struct edac_pci_ctl_info *pci)
32 {
33 struct mv64x60_pci_pdata *pdata = pci->pvt_info;
34 u32 cause;
35
36 cause = in_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE);
37 if (!cause)
38 return;
39
40 printk(KERN_ERR "Error in PCI %d Interface\n", pdata->pci_hose);
41 printk(KERN_ERR "Cause register: 0x%08x\n", cause);
42 printk(KERN_ERR "Address Low: 0x%08x\n",
43 in_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_ADDR_LO));
44 printk(KERN_ERR "Address High: 0x%08x\n",
45 in_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_ADDR_HI));
46 printk(KERN_ERR "Attribute: 0x%08x\n",
47 in_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_ATTR));
48 printk(KERN_ERR "Command: 0x%08x\n",
49 in_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_CMD));
50 out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE, ~cause);
51
52 if (cause & MV64X60_PCI_PE_MASK)
53 edac_pci_handle_pe(pci, pci->ctl_name);
54
55 if (!(cause & MV64X60_PCI_PE_MASK))
56 edac_pci_handle_npe(pci, pci->ctl_name);
57 }
58
59 static irqreturn_t mv64x60_pci_isr(int irq, void *dev_id)
60 {
61 struct edac_pci_ctl_info *pci = dev_id;
62 struct mv64x60_pci_pdata *pdata = pci->pvt_info;
63 u32 val;
64
65 val = in_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE);
66 if (!val)
67 return IRQ_NONE;
68
69 mv64x60_pci_check(pci);
70
71 return IRQ_HANDLED;
72 }
73
74 /*
75 * Bit 0 of MV64x60_PCIx_ERR_MASK does not exist on the 64360 and because of
76 * errata FEr-#11 and FEr-##16 for the 64460, it should be 0 on that chip as
77 * well. IOW, don't set bit 0.
78 */
79
80 /* Erratum FEr PCI-#16: clear bit 0 of PCI SERRn Mask reg. */
81 static int __init mv64x60_pci_fixup(struct platform_device *pdev)
82 {
83 struct resource *r;
84 void __iomem *pci_serr;
85
86 r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
87 if (!r) {
88 printk(KERN_ERR "%s: Unable to get resource for "
89 "PCI err regs\n", __func__);
90 return -ENOENT;
91 }
92
93 pci_serr = ioremap(r->start, resource_size(r));
94 if (!pci_serr)
95 return -ENOMEM;
96
97 out_le32(pci_serr, in_le32(pci_serr) & ~0x1);
98 iounmap(pci_serr);
99
100 return 0;
101 }
102
103 static int mv64x60_pci_err_probe(struct platform_device *pdev)
104 {
105 struct edac_pci_ctl_info *pci;
106 struct mv64x60_pci_pdata *pdata;
107 struct resource *r;
108 int res = 0;
109
110 if (!devres_open_group(&pdev->dev, mv64x60_pci_err_probe, GFP_KERNEL))
111 return -ENOMEM;
112
113 pci = edac_pci_alloc_ctl_info(sizeof(*pdata), "mv64x60_pci_err");
114 if (!pci)
115 return -ENOMEM;
116
117 pdata = pci->pvt_info;
118
119 pdata->pci_hose = pdev->id;
120 pdata->name = "mpc85xx_pci_err";
121 pdata->irq = NO_IRQ;
122 platform_set_drvdata(pdev, pci);
123 pci->dev = &pdev->dev;
124 pci->dev_name = dev_name(&pdev->dev);
125 pci->mod_name = EDAC_MOD_STR;
126 pci->ctl_name = pdata->name;
127
128 if (edac_op_state == EDAC_OPSTATE_POLL)
129 pci->edac_check = mv64x60_pci_check;
130
131 pdata->edac_idx = edac_pci_idx++;
132
133 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
134 if (!r) {
135 printk(KERN_ERR "%s: Unable to get resource for "
136 "PCI err regs\n", __func__);
137 res = -ENOENT;
138 goto err;
139 }
140
141 if (!devm_request_mem_region(&pdev->dev,
142 r->start,
143 resource_size(r),
144 pdata->name)) {
145 printk(KERN_ERR "%s: Error while requesting mem region\n",
146 __func__);
147 res = -EBUSY;
148 goto err;
149 }
150
151 pdata->pci_vbase = devm_ioremap(&pdev->dev,
152 r->start,
153 resource_size(r));
154 if (!pdata->pci_vbase) {
155 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
156 res = -ENOMEM;
157 goto err;
158 }
159
160 res = mv64x60_pci_fixup(pdev);
161 if (res < 0) {
162 printk(KERN_ERR "%s: PCI fixup failed\n", __func__);
163 goto err;
164 }
165
166 out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_CAUSE, 0);
167 out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_MASK, 0);
168 out_le32(pdata->pci_vbase + MV64X60_PCI_ERROR_MASK,
169 MV64X60_PCIx_ERR_MASK_VAL);
170
171 if (edac_pci_add_device(pci, pdata->edac_idx) > 0) {
172 edac_dbg(3, "failed edac_pci_add_device()\n");
173 goto err;
174 }
175
176 if (edac_op_state == EDAC_OPSTATE_INT) {
177 pdata->irq = platform_get_irq(pdev, 0);
178 res = devm_request_irq(&pdev->dev,
179 pdata->irq,
180 mv64x60_pci_isr,
181 IRQF_DISABLED,
182 "[EDAC] PCI err",
183 pci);
184 if (res < 0) {
185 printk(KERN_ERR "%s: Unable to request irq %d for "
186 "MV64x60 PCI ERR\n", __func__, pdata->irq);
187 res = -ENODEV;
188 goto err2;
189 }
190 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for PCI Err\n",
191 pdata->irq);
192 }
193
194 devres_remove_group(&pdev->dev, mv64x60_pci_err_probe);
195
196 /* get this far and it's successful */
197 edac_dbg(3, "success\n");
198
199 return 0;
200
201 err2:
202 edac_pci_del_device(&pdev->dev);
203 err:
204 edac_pci_free_ctl_info(pci);
205 devres_release_group(&pdev->dev, mv64x60_pci_err_probe);
206 return res;
207 }
208
209 static int mv64x60_pci_err_remove(struct platform_device *pdev)
210 {
211 struct edac_pci_ctl_info *pci = platform_get_drvdata(pdev);
212
213 edac_dbg(0, "\n");
214
215 edac_pci_del_device(&pdev->dev);
216
217 edac_pci_free_ctl_info(pci);
218
219 return 0;
220 }
221
222 static struct platform_driver mv64x60_pci_err_driver = {
223 .probe = mv64x60_pci_err_probe,
224 .remove = mv64x60_pci_err_remove,
225 .driver = {
226 .name = "mv64x60_pci_err",
227 }
228 };
229
230 #endif /* CONFIG_PCI */
231
232 /*********************** SRAM err device **********************************/
233 static void mv64x60_sram_check(struct edac_device_ctl_info *edac_dev)
234 {
235 struct mv64x60_sram_pdata *pdata = edac_dev->pvt_info;
236 u32 cause;
237
238 cause = in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE);
239 if (!cause)
240 return;
241
242 printk(KERN_ERR "Error in internal SRAM\n");
243 printk(KERN_ERR "Cause register: 0x%08x\n", cause);
244 printk(KERN_ERR "Address Low: 0x%08x\n",
245 in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_ADDR_LO));
246 printk(KERN_ERR "Address High: 0x%08x\n",
247 in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_ADDR_HI));
248 printk(KERN_ERR "Data Low: 0x%08x\n",
249 in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_DATA_LO));
250 printk(KERN_ERR "Data High: 0x%08x\n",
251 in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_DATA_HI));
252 printk(KERN_ERR "Parity: 0x%08x\n",
253 in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_PARITY));
254 out_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE, 0);
255
256 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
257 }
258
259 static irqreturn_t mv64x60_sram_isr(int irq, void *dev_id)
260 {
261 struct edac_device_ctl_info *edac_dev = dev_id;
262 struct mv64x60_sram_pdata *pdata = edac_dev->pvt_info;
263 u32 cause;
264
265 cause = in_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE);
266 if (!cause)
267 return IRQ_NONE;
268
269 mv64x60_sram_check(edac_dev);
270
271 return IRQ_HANDLED;
272 }
273
274 static int mv64x60_sram_err_probe(struct platform_device *pdev)
275 {
276 struct edac_device_ctl_info *edac_dev;
277 struct mv64x60_sram_pdata *pdata;
278 struct resource *r;
279 int res = 0;
280
281 if (!devres_open_group(&pdev->dev, mv64x60_sram_err_probe, GFP_KERNEL))
282 return -ENOMEM;
283
284 edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
285 "sram", 1, NULL, 0, 0, NULL, 0,
286 edac_dev_idx);
287 if (!edac_dev) {
288 devres_release_group(&pdev->dev, mv64x60_sram_err_probe);
289 return -ENOMEM;
290 }
291
292 pdata = edac_dev->pvt_info;
293 pdata->name = "mv64x60_sram_err";
294 pdata->irq = NO_IRQ;
295 edac_dev->dev = &pdev->dev;
296 platform_set_drvdata(pdev, edac_dev);
297 edac_dev->dev_name = dev_name(&pdev->dev);
298
299 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
300 if (!r) {
301 printk(KERN_ERR "%s: Unable to get resource for "
302 "SRAM err regs\n", __func__);
303 res = -ENOENT;
304 goto err;
305 }
306
307 if (!devm_request_mem_region(&pdev->dev,
308 r->start,
309 resource_size(r),
310 pdata->name)) {
311 printk(KERN_ERR "%s: Error while request mem region\n",
312 __func__);
313 res = -EBUSY;
314 goto err;
315 }
316
317 pdata->sram_vbase = devm_ioremap(&pdev->dev,
318 r->start,
319 resource_size(r));
320 if (!pdata->sram_vbase) {
321 printk(KERN_ERR "%s: Unable to setup SRAM err regs\n",
322 __func__);
323 res = -ENOMEM;
324 goto err;
325 }
326
327 /* setup SRAM err registers */
328 out_le32(pdata->sram_vbase + MV64X60_SRAM_ERR_CAUSE, 0);
329
330 edac_dev->mod_name = EDAC_MOD_STR;
331 edac_dev->ctl_name = pdata->name;
332
333 if (edac_op_state == EDAC_OPSTATE_POLL)
334 edac_dev->edac_check = mv64x60_sram_check;
335
336 pdata->edac_idx = edac_dev_idx++;
337
338 if (edac_device_add_device(edac_dev) > 0) {
339 edac_dbg(3, "failed edac_device_add_device()\n");
340 goto err;
341 }
342
343 if (edac_op_state == EDAC_OPSTATE_INT) {
344 pdata->irq = platform_get_irq(pdev, 0);
345 res = devm_request_irq(&pdev->dev,
346 pdata->irq,
347 mv64x60_sram_isr,
348 IRQF_DISABLED,
349 "[EDAC] SRAM err",
350 edac_dev);
351 if (res < 0) {
352 printk(KERN_ERR
353 "%s: Unable to request irq %d for "
354 "MV64x60 SRAM ERR\n", __func__, pdata->irq);
355 res = -ENODEV;
356 goto err2;
357 }
358
359 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for SRAM Err\n",
360 pdata->irq);
361 }
362
363 devres_remove_group(&pdev->dev, mv64x60_sram_err_probe);
364
365 /* get this far and it's successful */
366 edac_dbg(3, "success\n");
367
368 return 0;
369
370 err2:
371 edac_device_del_device(&pdev->dev);
372 err:
373 devres_release_group(&pdev->dev, mv64x60_sram_err_probe);
374 edac_device_free_ctl_info(edac_dev);
375 return res;
376 }
377
378 static int mv64x60_sram_err_remove(struct platform_device *pdev)
379 {
380 struct edac_device_ctl_info *edac_dev = platform_get_drvdata(pdev);
381
382 edac_dbg(0, "\n");
383
384 edac_device_del_device(&pdev->dev);
385 edac_device_free_ctl_info(edac_dev);
386
387 return 0;
388 }
389
390 static struct platform_driver mv64x60_sram_err_driver = {
391 .probe = mv64x60_sram_err_probe,
392 .remove = mv64x60_sram_err_remove,
393 .driver = {
394 .name = "mv64x60_sram_err",
395 }
396 };
397
398 /*********************** CPU err device **********************************/
399 static void mv64x60_cpu_check(struct edac_device_ctl_info *edac_dev)
400 {
401 struct mv64x60_cpu_pdata *pdata = edac_dev->pvt_info;
402 u32 cause;
403
404 cause = in_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE) &
405 MV64x60_CPU_CAUSE_MASK;
406 if (!cause)
407 return;
408
409 printk(KERN_ERR "Error on CPU interface\n");
410 printk(KERN_ERR "Cause register: 0x%08x\n", cause);
411 printk(KERN_ERR "Address Low: 0x%08x\n",
412 in_le32(pdata->cpu_vbase[0] + MV64x60_CPU_ERR_ADDR_LO));
413 printk(KERN_ERR "Address High: 0x%08x\n",
414 in_le32(pdata->cpu_vbase[0] + MV64x60_CPU_ERR_ADDR_HI));
415 printk(KERN_ERR "Data Low: 0x%08x\n",
416 in_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_DATA_LO));
417 printk(KERN_ERR "Data High: 0x%08x\n",
418 in_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_DATA_HI));
419 printk(KERN_ERR "Parity: 0x%08x\n",
420 in_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_PARITY));
421 out_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE, 0);
422
423 edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
424 }
425
426 static irqreturn_t mv64x60_cpu_isr(int irq, void *dev_id)
427 {
428 struct edac_device_ctl_info *edac_dev = dev_id;
429 struct mv64x60_cpu_pdata *pdata = edac_dev->pvt_info;
430 u32 cause;
431
432 cause = in_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE) &
433 MV64x60_CPU_CAUSE_MASK;
434 if (!cause)
435 return IRQ_NONE;
436
437 mv64x60_cpu_check(edac_dev);
438
439 return IRQ_HANDLED;
440 }
441
442 static int mv64x60_cpu_err_probe(struct platform_device *pdev)
443 {
444 struct edac_device_ctl_info *edac_dev;
445 struct resource *r;
446 struct mv64x60_cpu_pdata *pdata;
447 int res = 0;
448
449 if (!devres_open_group(&pdev->dev, mv64x60_cpu_err_probe, GFP_KERNEL))
450 return -ENOMEM;
451
452 edac_dev = edac_device_alloc_ctl_info(sizeof(*pdata),
453 "cpu", 1, NULL, 0, 0, NULL, 0,
454 edac_dev_idx);
455 if (!edac_dev) {
456 devres_release_group(&pdev->dev, mv64x60_cpu_err_probe);
457 return -ENOMEM;
458 }
459
460 pdata = edac_dev->pvt_info;
461 pdata->name = "mv64x60_cpu_err";
462 pdata->irq = NO_IRQ;
463 edac_dev->dev = &pdev->dev;
464 platform_set_drvdata(pdev, edac_dev);
465 edac_dev->dev_name = dev_name(&pdev->dev);
466
467 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
468 if (!r) {
469 printk(KERN_ERR "%s: Unable to get resource for "
470 "CPU err regs\n", __func__);
471 res = -ENOENT;
472 goto err;
473 }
474
475 if (!devm_request_mem_region(&pdev->dev,
476 r->start,
477 resource_size(r),
478 pdata->name)) {
479 printk(KERN_ERR "%s: Error while requesting mem region\n",
480 __func__);
481 res = -EBUSY;
482 goto err;
483 }
484
485 pdata->cpu_vbase[0] = devm_ioremap(&pdev->dev,
486 r->start,
487 resource_size(r));
488 if (!pdata->cpu_vbase[0]) {
489 printk(KERN_ERR "%s: Unable to setup CPU err regs\n", __func__);
490 res = -ENOMEM;
491 goto err;
492 }
493
494 r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
495 if (!r) {
496 printk(KERN_ERR "%s: Unable to get resource for "
497 "CPU err regs\n", __func__);
498 res = -ENOENT;
499 goto err;
500 }
501
502 if (!devm_request_mem_region(&pdev->dev,
503 r->start,
504 resource_size(r),
505 pdata->name)) {
506 printk(KERN_ERR "%s: Error while requesting mem region\n",
507 __func__);
508 res = -EBUSY;
509 goto err;
510 }
511
512 pdata->cpu_vbase[1] = devm_ioremap(&pdev->dev,
513 r->start,
514 resource_size(r));
515 if (!pdata->cpu_vbase[1]) {
516 printk(KERN_ERR "%s: Unable to setup CPU err regs\n", __func__);
517 res = -ENOMEM;
518 goto err;
519 }
520
521 /* setup CPU err registers */
522 out_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_CAUSE, 0);
523 out_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_MASK, 0);
524 out_le32(pdata->cpu_vbase[1] + MV64x60_CPU_ERR_MASK, 0x000000ff);
525
526 edac_dev->mod_name = EDAC_MOD_STR;
527 edac_dev->ctl_name = pdata->name;
528 if (edac_op_state == EDAC_OPSTATE_POLL)
529 edac_dev->edac_check = mv64x60_cpu_check;
530
531 pdata->edac_idx = edac_dev_idx++;
532
533 if (edac_device_add_device(edac_dev) > 0) {
534 edac_dbg(3, "failed edac_device_add_device()\n");
535 goto err;
536 }
537
538 if (edac_op_state == EDAC_OPSTATE_INT) {
539 pdata->irq = platform_get_irq(pdev, 0);
540 res = devm_request_irq(&pdev->dev,
541 pdata->irq,
542 mv64x60_cpu_isr,
543 IRQF_DISABLED,
544 "[EDAC] CPU err",
545 edac_dev);
546 if (res < 0) {
547 printk(KERN_ERR
548 "%s: Unable to request irq %d for MV64x60 "
549 "CPU ERR\n", __func__, pdata->irq);
550 res = -ENODEV;
551 goto err2;
552 }
553
554 printk(KERN_INFO EDAC_MOD_STR
555 " acquired irq %d for CPU Err\n", pdata->irq);
556 }
557
558 devres_remove_group(&pdev->dev, mv64x60_cpu_err_probe);
559
560 /* get this far and it's successful */
561 edac_dbg(3, "success\n");
562
563 return 0;
564
565 err2:
566 edac_device_del_device(&pdev->dev);
567 err:
568 devres_release_group(&pdev->dev, mv64x60_cpu_err_probe);
569 edac_device_free_ctl_info(edac_dev);
570 return res;
571 }
572
573 static int mv64x60_cpu_err_remove(struct platform_device *pdev)
574 {
575 struct edac_device_ctl_info *edac_dev = platform_get_drvdata(pdev);
576
577 edac_dbg(0, "\n");
578
579 edac_device_del_device(&pdev->dev);
580 edac_device_free_ctl_info(edac_dev);
581 return 0;
582 }
583
584 static struct platform_driver mv64x60_cpu_err_driver = {
585 .probe = mv64x60_cpu_err_probe,
586 .remove = mv64x60_cpu_err_remove,
587 .driver = {
588 .name = "mv64x60_cpu_err",
589 }
590 };
591
592 /*********************** DRAM err device **********************************/
593
594 static void mv64x60_mc_check(struct mem_ctl_info *mci)
595 {
596 struct mv64x60_mc_pdata *pdata = mci->pvt_info;
597 u32 reg;
598 u32 err_addr;
599 u32 sdram_ecc;
600 u32 comp_ecc;
601 u32 syndrome;
602
603 reg = in_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR);
604 if (!reg)
605 return;
606
607 err_addr = reg & ~0x3;
608 sdram_ecc = in_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_RCVD);
609 comp_ecc = in_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_CALC);
610 syndrome = sdram_ecc ^ comp_ecc;
611
612 /* first bit clear in ECC Err Reg, 1 bit error, correctable by HW */
613 if (!(reg & 0x1))
614 edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
615 err_addr >> PAGE_SHIFT,
616 err_addr & PAGE_MASK, syndrome,
617 0, 0, -1,
618 mci->ctl_name, "");
619 else /* 2 bit error, UE */
620 edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
621 err_addr >> PAGE_SHIFT,
622 err_addr & PAGE_MASK, 0,
623 0, 0, -1,
624 mci->ctl_name, "");
625
626 /* clear the error */
627 out_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR, 0);
628 }
629
630 static irqreturn_t mv64x60_mc_isr(int irq, void *dev_id)
631 {
632 struct mem_ctl_info *mci = dev_id;
633 struct mv64x60_mc_pdata *pdata = mci->pvt_info;
634 u32 reg;
635
636 reg = in_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR);
637 if (!reg)
638 return IRQ_NONE;
639
640 /* writing 0's to the ECC err addr in check function clears irq */
641 mv64x60_mc_check(mci);
642
643 return IRQ_HANDLED;
644 }
645
646 static void get_total_mem(struct mv64x60_mc_pdata *pdata)
647 {
648 struct device_node *np = NULL;
649 const unsigned int *reg;
650
651 np = of_find_node_by_type(NULL, "memory");
652 if (!np)
653 return;
654
655 reg = of_get_property(np, "reg", NULL);
656
657 pdata->total_mem = reg[1];
658 }
659
660 static void mv64x60_init_csrows(struct mem_ctl_info *mci,
661 struct mv64x60_mc_pdata *pdata)
662 {
663 struct csrow_info *csrow;
664 struct dimm_info *dimm;
665
666 u32 devtype;
667 u32 ctl;
668
669 get_total_mem(pdata);
670
671 ctl = in_le32(pdata->mc_vbase + MV64X60_SDRAM_CONFIG);
672
673 csrow = mci->csrows[0];
674 dimm = csrow->channels[0]->dimm;
675
676 dimm->nr_pages = pdata->total_mem >> PAGE_SHIFT;
677 dimm->grain = 8;
678
679 dimm->mtype = (ctl & MV64X60_SDRAM_REGISTERED) ? MEM_RDDR : MEM_DDR;
680
681 devtype = (ctl >> 20) & 0x3;
682 switch (devtype) {
683 case 0x0:
684 dimm->dtype = DEV_X32;
685 break;
686 case 0x2: /* could be X8 too, but no way to tell */
687 dimm->dtype = DEV_X16;
688 break;
689 case 0x3:
690 dimm->dtype = DEV_X4;
691 break;
692 default:
693 dimm->dtype = DEV_UNKNOWN;
694 break;
695 }
696
697 dimm->edac_mode = EDAC_SECDED;
698 }
699
700 static int mv64x60_mc_err_probe(struct platform_device *pdev)
701 {
702 struct mem_ctl_info *mci;
703 struct edac_mc_layer layers[2];
704 struct mv64x60_mc_pdata *pdata;
705 struct resource *r;
706 u32 ctl;
707 int res = 0;
708
709 if (!devres_open_group(&pdev->dev, mv64x60_mc_err_probe, GFP_KERNEL))
710 return -ENOMEM;
711
712 layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
713 layers[0].size = 1;
714 layers[0].is_virt_csrow = true;
715 layers[1].type = EDAC_MC_LAYER_CHANNEL;
716 layers[1].size = 1;
717 layers[1].is_virt_csrow = false;
718 mci = edac_mc_alloc(edac_mc_idx, ARRAY_SIZE(layers), layers,
719 sizeof(struct mv64x60_mc_pdata));
720 if (!mci) {
721 printk(KERN_ERR "%s: No memory for CPU err\n", __func__);
722 devres_release_group(&pdev->dev, mv64x60_mc_err_probe);
723 return -ENOMEM;
724 }
725
726 pdata = mci->pvt_info;
727 mci->pdev = &pdev->dev;
728 platform_set_drvdata(pdev, mci);
729 pdata->name = "mv64x60_mc_err";
730 pdata->irq = NO_IRQ;
731 mci->dev_name = dev_name(&pdev->dev);
732 pdata->edac_idx = edac_mc_idx++;
733
734 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
735 if (!r) {
736 printk(KERN_ERR "%s: Unable to get resource for "
737 "MC err regs\n", __func__);
738 res = -ENOENT;
739 goto err;
740 }
741
742 if (!devm_request_mem_region(&pdev->dev,
743 r->start,
744 resource_size(r),
745 pdata->name)) {
746 printk(KERN_ERR "%s: Error while requesting mem region\n",
747 __func__);
748 res = -EBUSY;
749 goto err;
750 }
751
752 pdata->mc_vbase = devm_ioremap(&pdev->dev,
753 r->start,
754 resource_size(r));
755 if (!pdata->mc_vbase) {
756 printk(KERN_ERR "%s: Unable to setup MC err regs\n", __func__);
757 res = -ENOMEM;
758 goto err;
759 }
760
761 ctl = in_le32(pdata->mc_vbase + MV64X60_SDRAM_CONFIG);
762 if (!(ctl & MV64X60_SDRAM_ECC)) {
763 /* Non-ECC RAM? */
764 printk(KERN_WARNING "%s: No ECC DIMMs discovered\n", __func__);
765 res = -ENODEV;
766 goto err2;
767 }
768
769 edac_dbg(3, "init mci\n");
770 mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_DDR;
771 mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED;
772 mci->edac_cap = EDAC_FLAG_SECDED;
773 mci->mod_name = EDAC_MOD_STR;
774 mci->mod_ver = MV64x60_REVISION;
775 mci->ctl_name = mv64x60_ctl_name;
776
777 if (edac_op_state == EDAC_OPSTATE_POLL)
778 mci->edac_check = mv64x60_mc_check;
779
780 mci->ctl_page_to_phys = NULL;
781
782 mci->scrub_mode = SCRUB_SW_SRC;
783
784 mv64x60_init_csrows(mci, pdata);
785
786 /* setup MC registers */
787 out_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ADDR, 0);
788 ctl = in_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_CNTL);
789 ctl = (ctl & 0xff00ffff) | 0x10000;
790 out_le32(pdata->mc_vbase + MV64X60_SDRAM_ERR_ECC_CNTL, ctl);
791
792 if (edac_mc_add_mc(mci)) {
793 edac_dbg(3, "failed edac_mc_add_mc()\n");
794 goto err;
795 }
796
797 if (edac_op_state == EDAC_OPSTATE_INT) {
798 /* acquire interrupt that reports errors */
799 pdata->irq = platform_get_irq(pdev, 0);
800 res = devm_request_irq(&pdev->dev,
801 pdata->irq,
802 mv64x60_mc_isr,
803 IRQF_DISABLED,
804 "[EDAC] MC err",
805 mci);
806 if (res < 0) {
807 printk(KERN_ERR "%s: Unable to request irq %d for "
808 "MV64x60 DRAM ERR\n", __func__, pdata->irq);
809 res = -ENODEV;
810 goto err2;
811 }
812
813 printk(KERN_INFO EDAC_MOD_STR " acquired irq %d for MC Err\n",
814 pdata->irq);
815 }
816
817 /* get this far and it's successful */
818 edac_dbg(3, "success\n");
819
820 return 0;
821
822 err2:
823 edac_mc_del_mc(&pdev->dev);
824 err:
825 devres_release_group(&pdev->dev, mv64x60_mc_err_probe);
826 edac_mc_free(mci);
827 return res;
828 }
829
830 static int mv64x60_mc_err_remove(struct platform_device *pdev)
831 {
832 struct mem_ctl_info *mci = platform_get_drvdata(pdev);
833
834 edac_dbg(0, "\n");
835
836 edac_mc_del_mc(&pdev->dev);
837 edac_mc_free(mci);
838 return 0;
839 }
840
841 static struct platform_driver mv64x60_mc_err_driver = {
842 .probe = mv64x60_mc_err_probe,
843 .remove = mv64x60_mc_err_remove,
844 .driver = {
845 .name = "mv64x60_mc_err",
846 }
847 };
848
849 static int __init mv64x60_edac_init(void)
850 {
851 int ret = 0;
852
853 printk(KERN_INFO "Marvell MV64x60 EDAC driver " MV64x60_REVISION "\n");
854 printk(KERN_INFO "\t(C) 2006-2007 MontaVista Software\n");
855 /* make sure error reporting method is sane */
856 switch (edac_op_state) {
857 case EDAC_OPSTATE_POLL:
858 case EDAC_OPSTATE_INT:
859 break;
860 default:
861 edac_op_state = EDAC_OPSTATE_INT;
862 break;
863 }
864
865 ret = platform_driver_register(&mv64x60_mc_err_driver);
866 if (ret)
867 printk(KERN_WARNING EDAC_MOD_STR "MC err failed to register\n");
868
869 ret = platform_driver_register(&mv64x60_cpu_err_driver);
870 if (ret)
871 printk(KERN_WARNING EDAC_MOD_STR
872 "CPU err failed to register\n");
873
874 ret = platform_driver_register(&mv64x60_sram_err_driver);
875 if (ret)
876 printk(KERN_WARNING EDAC_MOD_STR
877 "SRAM err failed to register\n");
878
879 #ifdef CONFIG_PCI
880 ret = platform_driver_register(&mv64x60_pci_err_driver);
881 if (ret)
882 printk(KERN_WARNING EDAC_MOD_STR
883 "PCI err failed to register\n");
884 #endif
885
886 return ret;
887 }
888 module_init(mv64x60_edac_init);
889
890 static void __exit mv64x60_edac_exit(void)
891 {
892 #ifdef CONFIG_PCI
893 platform_driver_unregister(&mv64x60_pci_err_driver);
894 #endif
895 platform_driver_unregister(&mv64x60_sram_err_driver);
896 platform_driver_unregister(&mv64x60_cpu_err_driver);
897 platform_driver_unregister(&mv64x60_mc_err_driver);
898 }
899 module_exit(mv64x60_edac_exit);
900
901 MODULE_LICENSE("GPL");
902 MODULE_AUTHOR("Montavista Software, Inc.");
903 module_param(edac_op_state, int, 0444);
904 MODULE_PARM_DESC(edac_op_state,
905 "EDAC Error Reporting state: 0=Poll, 2=Interrupt");
Linux with added FPC-III support