1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PS3 system bus driver.
4 *
5 * Copyright (C) 2006 Sony Computer Entertainment Inc.
6 * Copyright 2006 Sony Corp.
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/export.h>
12 #include <linux/dma-map-ops.h>
13 #include <linux/err.h>
14 #include <linux/slab.h>
15
16 #include <asm/udbg.h>
17 #include <asm/lv1call.h>
18 #include <asm/firmware.h>
19 #include <asm/cell-regs.h>
20
21 #include "platform.h"
22
23 static struct device ps3_system_bus = {
24 .init_name = "ps3_system",
25 };
26
27 /* FIXME: need device usage counters! */
28 static struct {
29 struct mutex mutex;
30 int sb_11; /* usb 0 */
31 int sb_12; /* usb 0 */
32 int gpu;
33 } usage_hack;
34
35 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
36 u64 dev_id)
37 {
38 return dev->bus_id == bus_id && dev->dev_id == dev_id;
39 }
40
41 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
42 {
43 int result;
44
45 BUG_ON(!dev->bus_id);
46 mutex_lock(&usage_hack.mutex);
47
48 if (ps3_is_device(dev, 1, 1)) {
49 usage_hack.sb_11++;
50 if (usage_hack.sb_11 > 1) {
51 result = 0;
52 goto done;
53 }
54 }
55
56 if (ps3_is_device(dev, 1, 2)) {
57 usage_hack.sb_12++;
58 if (usage_hack.sb_12 > 1) {
59 result = 0;
60 goto done;
61 }
62 }
63
64 result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
65
66 if (result) {
67 pr_warn("%s:%d: lv1_open_device dev=%u.%u(%s) failed: %s\n",
68 __func__, __LINE__, dev->match_id, dev->match_sub_id,
69 dev_name(&dev->core), ps3_result(result));
70 result = -EPERM;
71 }
72
73 done:
74 mutex_unlock(&usage_hack.mutex);
75 return result;
76 }
77
78 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
79 {
80 int result;
81
82 BUG_ON(!dev->bus_id);
83 mutex_lock(&usage_hack.mutex);
84
85 if (ps3_is_device(dev, 1, 1)) {
86 usage_hack.sb_11--;
87 if (usage_hack.sb_11) {
88 result = 0;
89 goto done;
90 }
91 }
92
93 if (ps3_is_device(dev, 1, 2)) {
94 usage_hack.sb_12--;
95 if (usage_hack.sb_12) {
96 result = 0;
97 goto done;
98 }
99 }
100
101 result = lv1_close_device(dev->bus_id, dev->dev_id);
102 BUG_ON(result);
103
104 done:
105 mutex_unlock(&usage_hack.mutex);
106 return result;
107 }
108
109 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
110 {
111 int result;
112
113 mutex_lock(&usage_hack.mutex);
114
115 usage_hack.gpu++;
116 if (usage_hack.gpu > 1) {
117 result = 0;
118 goto done;
119 }
120
121 result = lv1_gpu_open(0);
122
123 if (result) {
124 pr_warn("%s:%d: lv1_gpu_open failed: %s\n", __func__,
125 __LINE__, ps3_result(result));
126 result = -EPERM;
127 }
128
129 done:
130 mutex_unlock(&usage_hack.mutex);
131 return result;
132 }
133
134 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
135 {
136 int result;
137
138 mutex_lock(&usage_hack.mutex);
139
140 usage_hack.gpu--;
141 if (usage_hack.gpu) {
142 result = 0;
143 goto done;
144 }
145
146 result = lv1_gpu_close();
147 BUG_ON(result);
148
149 done:
150 mutex_unlock(&usage_hack.mutex);
151 return result;
152 }
153
154 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
155 {
156 BUG_ON(!dev);
157 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
158
159 switch (dev->match_id) {
160 case PS3_MATCH_ID_EHCI:
161 case PS3_MATCH_ID_OHCI:
162 case PS3_MATCH_ID_GELIC:
163 case PS3_MATCH_ID_STOR_DISK:
164 case PS3_MATCH_ID_STOR_ROM:
165 case PS3_MATCH_ID_STOR_FLASH:
166 return ps3_open_hv_device_sb(dev);
167
168 case PS3_MATCH_ID_SOUND:
169 case PS3_MATCH_ID_GPU:
170 return ps3_open_hv_device_gpu(dev);
171
172 case PS3_MATCH_ID_AV_SETTINGS:
173 case PS3_MATCH_ID_SYSTEM_MANAGER:
174 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
175 __LINE__, dev->match_id);
176 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
177 dev->bus_id);
178 BUG();
179 return -EINVAL;
180
181 default:
182 break;
183 }
184
185 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
186 dev->match_id);
187 BUG();
188 return -ENODEV;
189 }
190 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
191
192 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
193 {
194 BUG_ON(!dev);
195 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
196
197 switch (dev->match_id) {
198 case PS3_MATCH_ID_EHCI:
199 case PS3_MATCH_ID_OHCI:
200 case PS3_MATCH_ID_GELIC:
201 case PS3_MATCH_ID_STOR_DISK:
202 case PS3_MATCH_ID_STOR_ROM:
203 case PS3_MATCH_ID_STOR_FLASH:
204 return ps3_close_hv_device_sb(dev);
205
206 case PS3_MATCH_ID_SOUND:
207 case PS3_MATCH_ID_GPU:
208 return ps3_close_hv_device_gpu(dev);
209
210 case PS3_MATCH_ID_AV_SETTINGS:
211 case PS3_MATCH_ID_SYSTEM_MANAGER:
212 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
213 __LINE__, dev->match_id);
214 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
215 dev->bus_id);
216 BUG();
217 return -EINVAL;
218
219 default:
220 break;
221 }
222
223 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
224 dev->match_id);
225 BUG();
226 return -ENODEV;
227 }
228 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
229
230 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
231 static void _dump_mmio_region(const struct ps3_mmio_region* r,
232 const char* func, int line)
233 {
234 pr_debug("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id,
235 r->dev->dev_id);
236 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
237 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
238 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
239 }
240
241 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
242 {
243 int result;
244 u64 lpar_addr;
245
246 result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
247 r->bus_addr, r->len, r->page_size, &lpar_addr);
248 r->lpar_addr = lpar_addr;
249
250 if (result) {
251 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
252 __func__, __LINE__, ps3_result(result));
253 r->lpar_addr = 0;
254 }
255
256 dump_mmio_region(r);
257 return result;
258 }
259
260 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
261 {
262 /* device specific; do nothing currently */
263 return 0;
264 }
265
266 int ps3_mmio_region_create(struct ps3_mmio_region *r)
267 {
268 return r->mmio_ops->create(r);
269 }
270 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
271
272 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
273 {
274 int result;
275
276 dump_mmio_region(r);
277 result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
278 r->lpar_addr);
279
280 if (result)
281 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
282 __func__, __LINE__, ps3_result(result));
283
284 r->lpar_addr = 0;
285 return result;
286 }
287
288 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
289 {
290 /* device specific; do nothing currently */
291 return 0;
292 }
293
294
295 int ps3_free_mmio_region(struct ps3_mmio_region *r)
296 {
297 return r->mmio_ops->free(r);
298 }
299
300 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
301
302 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
303 .create = ps3_sb_mmio_region_create,
304 .free = ps3_sb_free_mmio_region
305 };
306
307 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
308 .create = ps3_ioc0_mmio_region_create,
309 .free = ps3_ioc0_free_mmio_region
310 };
311
312 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
313 struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
314 enum ps3_mmio_page_size page_size)
315 {
316 r->dev = dev;
317 r->bus_addr = bus_addr;
318 r->len = len;
319 r->page_size = page_size;
320 switch (dev->dev_type) {
321 case PS3_DEVICE_TYPE_SB:
322 r->mmio_ops = &ps3_mmio_sb_region_ops;
323 break;
324 case PS3_DEVICE_TYPE_IOC0:
325 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
326 break;
327 default:
328 BUG();
329 return -EINVAL;
330 }
331 return 0;
332 }
333 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
334
335 static int ps3_system_bus_match(struct device *_dev,
336 const struct device_driver *_drv)
337 {
338 int result;
339 const struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
340 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
341
342 if (!dev->match_sub_id)
343 result = dev->match_id == drv->match_id;
344 else
345 result = dev->match_sub_id == drv->match_sub_id &&
346 dev->match_id == drv->match_id;
347
348 if (result)
349 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
350 __func__, __LINE__,
351 dev->match_id, dev->match_sub_id, dev_name(&dev->core),
352 drv->match_id, drv->match_sub_id, drv->core.name);
353 else
354 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
355 __func__, __LINE__,
356 dev->match_id, dev->match_sub_id, dev_name(&dev->core),
357 drv->match_id, drv->match_sub_id, drv->core.name);
358
359 return result;
360 }
361
362 static int ps3_system_bus_probe(struct device *_dev)
363 {
364 int result = 0;
365 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
366 struct ps3_system_bus_driver *drv;
367
368 BUG_ON(!dev);
369 dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
370
371 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
372 BUG_ON(!drv);
373
374 if (drv->probe)
375 result = drv->probe(dev);
376 else
377 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
378 dev_name(&dev->core));
379
380 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
381 return result;
382 }
383
384 static void ps3_system_bus_remove(struct device *_dev)
385 {
386 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
387 struct ps3_system_bus_driver *drv;
388
389 BUG_ON(!dev);
390 dev_dbg(_dev, "%s:%d\n", __func__, __LINE__);
391
392 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
393 BUG_ON(!drv);
394
395 if (drv->remove)
396 drv->remove(dev);
397 else
398 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
399 __func__, __LINE__, drv->core.name);
400
401 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
402 }
403
404 static void ps3_system_bus_shutdown(struct device *_dev)
405 {
406 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
407 struct ps3_system_bus_driver *drv;
408
409 BUG_ON(!dev);
410
411 dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
412 dev->match_id);
413
414 if (!dev->core.driver) {
415 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
416 __LINE__);
417 return;
418 }
419
420 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
421
422 BUG_ON(!drv);
423
424 dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
425 dev_name(&dev->core), drv->core.name);
426
427 if (drv->shutdown)
428 drv->shutdown(dev);
429 else if (drv->remove) {
430 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
431 __func__, __LINE__, drv->core.name);
432 drv->remove(dev);
433 } else {
434 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
435 __func__, __LINE__, drv->core.name);
436 BUG();
437 }
438
439 dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
440 }
441
442 static int ps3_system_bus_uevent(const struct device *_dev, struct kobj_uevent_env *env)
443 {
444 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
445
446 if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
447 dev->match_sub_id))
448 return -ENOMEM;
449 return 0;
450 }
451
452 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
453 char *buf)
454 {
455 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
456 int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
457 dev->match_sub_id);
458
459 return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
460 }
461 static DEVICE_ATTR_RO(modalias);
462
463 static struct attribute *ps3_system_bus_dev_attrs[] = {
464 &dev_attr_modalias.attr,
465 NULL,
466 };
467 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
468
469 static struct bus_type ps3_system_bus_type = {
470 .name = "ps3_system_bus",
471 .match = ps3_system_bus_match,
472 .uevent = ps3_system_bus_uevent,
473 .probe = ps3_system_bus_probe,
474 .remove = ps3_system_bus_remove,
475 .shutdown = ps3_system_bus_shutdown,
476 .dev_groups = ps3_system_bus_dev_groups,
477 };
478
479 static int __init ps3_system_bus_init(void)
480 {
481 int result;
482
483 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
484 return -ENODEV;
485
486 pr_debug(" -> %s:%d\n", __func__, __LINE__);
487
488 mutex_init(&usage_hack.mutex);
489
490 result = device_register(&ps3_system_bus);
491 BUG_ON(result);
492
493 result = bus_register(&ps3_system_bus_type);
494 BUG_ON(result);
495
496 pr_debug(" <- %s:%d\n", __func__, __LINE__);
497 return result;
498 }
499
500 core_initcall(ps3_system_bus_init);
501
502 /* Allocates a contiguous real buffer and creates mappings over it.
503 * Returns the virtual address of the buffer and sets dma_handle
504 * to the dma address (mapping) of the first page.
505 */
506 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
507 dma_addr_t *dma_handle, gfp_t flag,
508 unsigned long attrs)
509 {
510 int result;
511 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
512 unsigned long virt_addr;
513
514 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
515 flag |= __GFP_ZERO;
516
517 virt_addr = __get_free_pages(flag, get_order(size));
518
519 if (!virt_addr) {
520 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
521 goto clean_none;
522 }
523
524 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
525 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
526 CBE_IOPTE_SO_RW | CBE_IOPTE_M);
527
528 if (result) {
529 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
530 __func__, __LINE__, result);
531 BUG_ON("check region type");
532 goto clean_alloc;
533 }
534
535 return (void*)virt_addr;
536
537 clean_alloc:
538 free_pages(virt_addr, get_order(size));
539 clean_none:
540 dma_handle = NULL;
541 return NULL;
542 }
543
544 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
545 dma_addr_t dma_handle, unsigned long attrs)
546 {
547 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
548
549 ps3_dma_unmap(dev->d_region, dma_handle, size);
550 free_pages((unsigned long)vaddr, get_order(size));
551 }
552
553 /* Creates TCEs for a user provided buffer. The user buffer must be
554 * contiguous real kernel storage (not vmalloc). The address passed here
555 * comprises a page address and offset into that page. The dma_addr_t
556 * returned will point to the same byte within the page as was passed in.
557 */
558
559 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
560 unsigned long offset, size_t size, enum dma_data_direction direction,
561 unsigned long attrs)
562 {
563 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
564 int result;
565 dma_addr_t bus_addr;
566 void *ptr = page_address(page) + offset;
567
568 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
569 &bus_addr,
570 CBE_IOPTE_PP_R | CBE_IOPTE_PP_W |
571 CBE_IOPTE_SO_RW | CBE_IOPTE_M);
572
573 if (result) {
574 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
575 __func__, __LINE__, result);
576 }
577
578 return bus_addr;
579 }
580
581 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
582 unsigned long offset, size_t size,
583 enum dma_data_direction direction,
584 unsigned long attrs)
585 {
586 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
587 int result;
588 dma_addr_t bus_addr;
589 u64 iopte_flag;
590 void *ptr = page_address(page) + offset;
591
592 iopte_flag = CBE_IOPTE_M;
593 switch (direction) {
594 case DMA_BIDIRECTIONAL:
595 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
596 break;
597 case DMA_TO_DEVICE:
598 iopte_flag |= CBE_IOPTE_PP_R | CBE_IOPTE_SO_R;
599 break;
600 case DMA_FROM_DEVICE:
601 iopte_flag |= CBE_IOPTE_PP_W | CBE_IOPTE_SO_RW;
602 break;
603 default:
604 /* not happened */
605 BUG();
606 }
607 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
608 &bus_addr, iopte_flag);
609
610 if (result) {
611 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
612 __func__, __LINE__, result);
613 }
614 return bus_addr;
615 }
616
617 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
618 size_t size, enum dma_data_direction direction, unsigned long attrs)
619 {
620 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
621 int result;
622
623 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
624
625 if (result) {
626 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
627 __func__, __LINE__, result);
628 }
629 }
630
631 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
632 int nents, enum dma_data_direction direction, unsigned long attrs)
633 {
634 #if defined(CONFIG_PS3_DYNAMIC_DMA)
635 BUG_ON("do");
636 return -EPERM;
637 #else
638 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
639 struct scatterlist *sg;
640 int i;
641
642 for_each_sg(sgl, sg, nents, i) {
643 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
644 sg->length, &sg->dma_address, 0);
645
646 if (result) {
647 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
648 __func__, __LINE__, result);
649 return -EINVAL;
650 }
651
652 sg->dma_length = sg->length;
653 }
654
655 return nents;
656 #endif
657 }
658
659 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
660 int nents,
661 enum dma_data_direction direction,
662 unsigned long attrs)
663 {
664 BUG();
665 return -EINVAL;
666 }
667
668 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
669 int nents, enum dma_data_direction direction, unsigned long attrs)
670 {
671 #if defined(CONFIG_PS3_DYNAMIC_DMA)
672 BUG_ON("do");
673 #endif
674 }
675
676 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
677 int nents, enum dma_data_direction direction,
678 unsigned long attrs)
679 {
680 BUG();
681 }
682
683 static int ps3_dma_supported(struct device *_dev, u64 mask)
684 {
685 return mask >= DMA_BIT_MASK(32);
686 }
687
688 static const struct dma_map_ops ps3_sb_dma_ops = {
689 .alloc = ps3_alloc_coherent,
690 .free = ps3_free_coherent,
691 .map_sg = ps3_sb_map_sg,
692 .unmap_sg = ps3_sb_unmap_sg,
693 .dma_supported = ps3_dma_supported,
694 .map_page = ps3_sb_map_page,
695 .unmap_page = ps3_unmap_page,
696 .mmap = dma_common_mmap,
697 .get_sgtable = dma_common_get_sgtable,
698 .alloc_pages_op = dma_common_alloc_pages,
699 .free_pages = dma_common_free_pages,
700 };
701
702 static const struct dma_map_ops ps3_ioc0_dma_ops = {
703 .alloc = ps3_alloc_coherent,
704 .free = ps3_free_coherent,
705 .map_sg = ps3_ioc0_map_sg,
706 .unmap_sg = ps3_ioc0_unmap_sg,
707 .dma_supported = ps3_dma_supported,
708 .map_page = ps3_ioc0_map_page,
709 .unmap_page = ps3_unmap_page,
710 .mmap = dma_common_mmap,
711 .get_sgtable = dma_common_get_sgtable,
712 .alloc_pages_op = dma_common_alloc_pages,
713 .free_pages = dma_common_free_pages,
714 };
715
716 /**
717 * ps3_system_bus_release_device - remove a device from the system bus
718 */
719
720 static void ps3_system_bus_release_device(struct device *_dev)
721 {
722 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
723 kfree(dev);
724 }
725
726 /**
727 * ps3_system_bus_device_register - add a device to the system bus
728 *
729 * ps3_system_bus_device_register() expects the dev object to be allocated
730 * dynamically by the caller. The system bus takes ownership of the dev
731 * object and frees the object in ps3_system_bus_release_device().
732 */
733
734 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
735 {
736 int result;
737 static unsigned int dev_ioc0_count;
738 static unsigned int dev_sb_count;
739 static unsigned int dev_vuart_count;
740 static unsigned int dev_lpm_count;
741
742 if (!dev->core.parent)
743 dev->core.parent = &ps3_system_bus;
744 dev->core.bus = &ps3_system_bus_type;
745 dev->core.release = ps3_system_bus_release_device;
746
747 switch (dev->dev_type) {
748 case PS3_DEVICE_TYPE_IOC0:
749 dev->core.dma_ops = &ps3_ioc0_dma_ops;
750 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
751 break;
752 case PS3_DEVICE_TYPE_SB:
753 dev->core.dma_ops = &ps3_sb_dma_ops;
754 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
755
756 break;
757 case PS3_DEVICE_TYPE_VUART:
758 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
759 break;
760 case PS3_DEVICE_TYPE_LPM:
761 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
762 break;
763 default:
764 BUG();
765 }
766
767 dev->core.of_node = NULL;
768 set_dev_node(&dev->core, 0);
769
770 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
771
772 result = device_register(&dev->core);
773 return result;
774 }
775
776 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
777
778 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
779 {
780 int result;
781
782 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
783
784 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
785 return -ENODEV;
786
787 drv->core.bus = &ps3_system_bus_type;
788
789 result = driver_register(&drv->core);
790 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
791 return result;
792 }
793
794 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
795
796 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
797 {
798 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
799 driver_unregister(&drv->core);
800 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
801 }
802
803 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
804
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