1 /*
2 * PS3 system bus driver.
3 *
4 * Copyright (C) 2006 Sony Computer Entertainment Inc.
5 * Copyright 2006 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/err.h>
26
27 #include <asm/udbg.h>
28 #include <asm/lv1call.h>
29 #include <asm/firmware.h>
30
31 #include "platform.h"
32
33 static struct device ps3_system_bus = {
34 .init_name = "ps3_system",
35 };
36
37 /* FIXME: need device usage counters! */
38 struct {
39 struct mutex mutex;
40 int sb_11; /* usb 0 */
41 int sb_12; /* usb 0 */
42 int gpu;
43 } static usage_hack;
44
ps3_is_device(struct ps3_system_bus_device * dev,u64 bus_id,u64 dev_id)45 static int ps3_is_device(struct ps3_system_bus_device *dev, u64 bus_id,
46 u64 dev_id)
47 {
48 return dev->bus_id == bus_id && dev->dev_id == dev_id;
49 }
50
ps3_open_hv_device_sb(struct ps3_system_bus_device * dev)51 static int ps3_open_hv_device_sb(struct ps3_system_bus_device *dev)
52 {
53 int result;
54
55 BUG_ON(!dev->bus_id);
56 mutex_lock(&usage_hack.mutex);
57
58 if (ps3_is_device(dev, 1, 1)) {
59 usage_hack.sb_11++;
60 if (usage_hack.sb_11 > 1) {
61 result = 0;
62 goto done;
63 }
64 }
65
66 if (ps3_is_device(dev, 1, 2)) {
67 usage_hack.sb_12++;
68 if (usage_hack.sb_12 > 1) {
69 result = 0;
70 goto done;
71 }
72 }
73
74 result = lv1_open_device(dev->bus_id, dev->dev_id, 0);
75
76 if (result) {
77 pr_debug("%s:%d: lv1_open_device failed: %s\n", __func__,
78 __LINE__, ps3_result(result));
79 result = -EPERM;
80 }
81
82 done:
83 mutex_unlock(&usage_hack.mutex);
84 return result;
85 }
86
ps3_close_hv_device_sb(struct ps3_system_bus_device * dev)87 static int ps3_close_hv_device_sb(struct ps3_system_bus_device *dev)
88 {
89 int result;
90
91 BUG_ON(!dev->bus_id);
92 mutex_lock(&usage_hack.mutex);
93
94 if (ps3_is_device(dev, 1, 1)) {
95 usage_hack.sb_11--;
96 if (usage_hack.sb_11) {
97 result = 0;
98 goto done;
99 }
100 }
101
102 if (ps3_is_device(dev, 1, 2)) {
103 usage_hack.sb_12--;
104 if (usage_hack.sb_12) {
105 result = 0;
106 goto done;
107 }
108 }
109
110 result = lv1_close_device(dev->bus_id, dev->dev_id);
111 BUG_ON(result);
112
113 done:
114 mutex_unlock(&usage_hack.mutex);
115 return result;
116 }
117
ps3_open_hv_device_gpu(struct ps3_system_bus_device * dev)118 static int ps3_open_hv_device_gpu(struct ps3_system_bus_device *dev)
119 {
120 int result;
121
122 mutex_lock(&usage_hack.mutex);
123
124 usage_hack.gpu++;
125 if (usage_hack.gpu > 1) {
126 result = 0;
127 goto done;
128 }
129
130 result = lv1_gpu_open(0);
131
132 if (result) {
133 pr_debug("%s:%d: lv1_gpu_open failed: %s\n", __func__,
134 __LINE__, ps3_result(result));
135 result = -EPERM;
136 }
137
138 done:
139 mutex_unlock(&usage_hack.mutex);
140 return result;
141 }
142
ps3_close_hv_device_gpu(struct ps3_system_bus_device * dev)143 static int ps3_close_hv_device_gpu(struct ps3_system_bus_device *dev)
144 {
145 int result;
146
147 mutex_lock(&usage_hack.mutex);
148
149 usage_hack.gpu--;
150 if (usage_hack.gpu) {
151 result = 0;
152 goto done;
153 }
154
155 result = lv1_gpu_close();
156 BUG_ON(result);
157
158 done:
159 mutex_unlock(&usage_hack.mutex);
160 return result;
161 }
162
ps3_open_hv_device(struct ps3_system_bus_device * dev)163 int ps3_open_hv_device(struct ps3_system_bus_device *dev)
164 {
165 BUG_ON(!dev);
166 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
167
168 switch (dev->match_id) {
169 case PS3_MATCH_ID_EHCI:
170 case PS3_MATCH_ID_OHCI:
171 case PS3_MATCH_ID_GELIC:
172 case PS3_MATCH_ID_STOR_DISK:
173 case PS3_MATCH_ID_STOR_ROM:
174 case PS3_MATCH_ID_STOR_FLASH:
175 return ps3_open_hv_device_sb(dev);
176
177 case PS3_MATCH_ID_SOUND:
178 case PS3_MATCH_ID_GPU:
179 return ps3_open_hv_device_gpu(dev);
180
181 case PS3_MATCH_ID_AV_SETTINGS:
182 case PS3_MATCH_ID_SYSTEM_MANAGER:
183 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
184 __LINE__, dev->match_id);
185 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
186 dev->bus_id);
187 BUG();
188 return -EINVAL;
189
190 default:
191 break;
192 }
193
194 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
195 dev->match_id);
196 BUG();
197 return -ENODEV;
198 }
199 EXPORT_SYMBOL_GPL(ps3_open_hv_device);
200
ps3_close_hv_device(struct ps3_system_bus_device * dev)201 int ps3_close_hv_device(struct ps3_system_bus_device *dev)
202 {
203 BUG_ON(!dev);
204 pr_debug("%s:%d: match_id: %u\n", __func__, __LINE__, dev->match_id);
205
206 switch (dev->match_id) {
207 case PS3_MATCH_ID_EHCI:
208 case PS3_MATCH_ID_OHCI:
209 case PS3_MATCH_ID_GELIC:
210 case PS3_MATCH_ID_STOR_DISK:
211 case PS3_MATCH_ID_STOR_ROM:
212 case PS3_MATCH_ID_STOR_FLASH:
213 return ps3_close_hv_device_sb(dev);
214
215 case PS3_MATCH_ID_SOUND:
216 case PS3_MATCH_ID_GPU:
217 return ps3_close_hv_device_gpu(dev);
218
219 case PS3_MATCH_ID_AV_SETTINGS:
220 case PS3_MATCH_ID_SYSTEM_MANAGER:
221 pr_debug("%s:%d: unsupported match_id: %u\n", __func__,
222 __LINE__, dev->match_id);
223 pr_debug("%s:%d: bus_id: %llu\n", __func__, __LINE__,
224 dev->bus_id);
225 BUG();
226 return -EINVAL;
227
228 default:
229 break;
230 }
231
232 pr_debug("%s:%d: unknown match_id: %u\n", __func__, __LINE__,
233 dev->match_id);
234 BUG();
235 return -ENODEV;
236 }
237 EXPORT_SYMBOL_GPL(ps3_close_hv_device);
238
239 #define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
_dump_mmio_region(const struct ps3_mmio_region * r,const char * func,int line)240 static void _dump_mmio_region(const struct ps3_mmio_region* r,
241 const char* func, int line)
242 {
243 pr_debug("%s:%d: dev %llu:%llu\n", func, line, r->dev->bus_id,
244 r->dev->dev_id);
245 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
246 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
247 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
248 }
249
ps3_sb_mmio_region_create(struct ps3_mmio_region * r)250 static int ps3_sb_mmio_region_create(struct ps3_mmio_region *r)
251 {
252 int result;
253 u64 lpar_addr;
254
255 result = lv1_map_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
256 r->bus_addr, r->len, r->page_size, &lpar_addr);
257 r->lpar_addr = lpar_addr;
258
259 if (result) {
260 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
261 __func__, __LINE__, ps3_result(result));
262 r->lpar_addr = 0;
263 }
264
265 dump_mmio_region(r);
266 return result;
267 }
268
ps3_ioc0_mmio_region_create(struct ps3_mmio_region * r)269 static int ps3_ioc0_mmio_region_create(struct ps3_mmio_region *r)
270 {
271 /* device specific; do nothing currently */
272 return 0;
273 }
274
ps3_mmio_region_create(struct ps3_mmio_region * r)275 int ps3_mmio_region_create(struct ps3_mmio_region *r)
276 {
277 return r->mmio_ops->create(r);
278 }
279 EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
280
ps3_sb_free_mmio_region(struct ps3_mmio_region * r)281 static int ps3_sb_free_mmio_region(struct ps3_mmio_region *r)
282 {
283 int result;
284
285 dump_mmio_region(r);
286 ;
287 result = lv1_unmap_device_mmio_region(r->dev->bus_id, r->dev->dev_id,
288 r->lpar_addr);
289
290 if (result)
291 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
292 __func__, __LINE__, ps3_result(result));
293
294 r->lpar_addr = 0;
295 return result;
296 }
297
ps3_ioc0_free_mmio_region(struct ps3_mmio_region * r)298 static int ps3_ioc0_free_mmio_region(struct ps3_mmio_region *r)
299 {
300 /* device specific; do nothing currently */
301 return 0;
302 }
303
304
ps3_free_mmio_region(struct ps3_mmio_region * r)305 int ps3_free_mmio_region(struct ps3_mmio_region *r)
306 {
307 return r->mmio_ops->free(r);
308 }
309
310 EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
311
312 static const struct ps3_mmio_region_ops ps3_mmio_sb_region_ops = {
313 .create = ps3_sb_mmio_region_create,
314 .free = ps3_sb_free_mmio_region
315 };
316
317 static const struct ps3_mmio_region_ops ps3_mmio_ioc0_region_ops = {
318 .create = ps3_ioc0_mmio_region_create,
319 .free = ps3_ioc0_free_mmio_region
320 };
321
ps3_mmio_region_init(struct ps3_system_bus_device * dev,struct ps3_mmio_region * r,unsigned long bus_addr,unsigned long len,enum ps3_mmio_page_size page_size)322 int ps3_mmio_region_init(struct ps3_system_bus_device *dev,
323 struct ps3_mmio_region *r, unsigned long bus_addr, unsigned long len,
324 enum ps3_mmio_page_size page_size)
325 {
326 r->dev = dev;
327 r->bus_addr = bus_addr;
328 r->len = len;
329 r->page_size = page_size;
330 switch (dev->dev_type) {
331 case PS3_DEVICE_TYPE_SB:
332 r->mmio_ops = &ps3_mmio_sb_region_ops;
333 break;
334 case PS3_DEVICE_TYPE_IOC0:
335 r->mmio_ops = &ps3_mmio_ioc0_region_ops;
336 break;
337 default:
338 BUG();
339 return -EINVAL;
340 }
341 return 0;
342 }
343 EXPORT_SYMBOL_GPL(ps3_mmio_region_init);
344
ps3_system_bus_match(struct device * _dev,struct device_driver * _drv)345 static int ps3_system_bus_match(struct device *_dev,
346 struct device_driver *_drv)
347 {
348 int result;
349 struct ps3_system_bus_driver *drv = ps3_drv_to_system_bus_drv(_drv);
350 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
351
352 if (!dev->match_sub_id)
353 result = dev->match_id == drv->match_id;
354 else
355 result = dev->match_sub_id == drv->match_sub_id &&
356 dev->match_id == drv->match_id;
357
358 if (result)
359 pr_info("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): match\n",
360 __func__, __LINE__,
361 dev->match_id, dev->match_sub_id, dev_name(&dev->core),
362 drv->match_id, drv->match_sub_id, drv->core.name);
363 else
364 pr_debug("%s:%d: dev=%u.%u(%s), drv=%u.%u(%s): miss\n",
365 __func__, __LINE__,
366 dev->match_id, dev->match_sub_id, dev_name(&dev->core),
367 drv->match_id, drv->match_sub_id, drv->core.name);
368
369 return result;
370 }
371
ps3_system_bus_probe(struct device * _dev)372 static int ps3_system_bus_probe(struct device *_dev)
373 {
374 int result = 0;
375 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
376 struct ps3_system_bus_driver *drv;
377
378 BUG_ON(!dev);
379 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
380
381 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
382 BUG_ON(!drv);
383
384 if (drv->probe)
385 result = drv->probe(dev);
386 else
387 pr_debug("%s:%d: %s no probe method\n", __func__, __LINE__,
388 dev_name(&dev->core));
389
390 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
391 return result;
392 }
393
ps3_system_bus_remove(struct device * _dev)394 static int ps3_system_bus_remove(struct device *_dev)
395 {
396 int result = 0;
397 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
398 struct ps3_system_bus_driver *drv;
399
400 BUG_ON(!dev);
401 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, _dev->bus_id);
402
403 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
404 BUG_ON(!drv);
405
406 if (drv->remove)
407 result = drv->remove(dev);
408 else
409 dev_dbg(&dev->core, "%s:%d %s: no remove method\n",
410 __func__, __LINE__, drv->core.name);
411
412 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
413 return result;
414 }
415
ps3_system_bus_shutdown(struct device * _dev)416 static void ps3_system_bus_shutdown(struct device *_dev)
417 {
418 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
419 struct ps3_system_bus_driver *drv;
420
421 BUG_ON(!dev);
422
423 dev_dbg(&dev->core, " -> %s:%d: match_id %d\n", __func__, __LINE__,
424 dev->match_id);
425
426 if (!dev->core.driver) {
427 dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__,
428 __LINE__);
429 return;
430 }
431
432 drv = ps3_system_bus_dev_to_system_bus_drv(dev);
433
434 BUG_ON(!drv);
435
436 dev_dbg(&dev->core, "%s:%d: %s -> %s\n", __func__, __LINE__,
437 dev_name(&dev->core), drv->core.name);
438
439 if (drv->shutdown)
440 drv->shutdown(dev);
441 else if (drv->remove) {
442 dev_dbg(&dev->core, "%s:%d %s: no shutdown, calling remove\n",
443 __func__, __LINE__, drv->core.name);
444 drv->remove(dev);
445 } else {
446 dev_dbg(&dev->core, "%s:%d %s: no shutdown method\n",
447 __func__, __LINE__, drv->core.name);
448 BUG();
449 }
450
451 dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
452 }
453
ps3_system_bus_uevent(struct device * _dev,struct kobj_uevent_env * env)454 static int ps3_system_bus_uevent(struct device *_dev, struct kobj_uevent_env *env)
455 {
456 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
457
458 if (add_uevent_var(env, "MODALIAS=ps3:%d:%d", dev->match_id,
459 dev->match_sub_id))
460 return -ENOMEM;
461 return 0;
462 }
463
modalias_show(struct device * _dev,struct device_attribute * a,char * buf)464 static ssize_t modalias_show(struct device *_dev, struct device_attribute *a,
465 char *buf)
466 {
467 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
468 int len = snprintf(buf, PAGE_SIZE, "ps3:%d:%d\n", dev->match_id,
469 dev->match_sub_id);
470
471 return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
472 }
473
474 static struct device_attribute ps3_system_bus_dev_attrs[] = {
475 __ATTR_RO(modalias),
476 __ATTR_NULL,
477 };
478
479 struct bus_type ps3_system_bus_type = {
480 .name = "ps3_system_bus",
481 .match = ps3_system_bus_match,
482 .uevent = ps3_system_bus_uevent,
483 .probe = ps3_system_bus_probe,
484 .remove = ps3_system_bus_remove,
485 .shutdown = ps3_system_bus_shutdown,
486 .dev_attrs = ps3_system_bus_dev_attrs,
487 };
488
ps3_system_bus_init(void)489 static int __init ps3_system_bus_init(void)
490 {
491 int result;
492
493 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
494 return -ENODEV;
495
496 pr_debug(" -> %s:%d\n", __func__, __LINE__);
497
498 mutex_init(&usage_hack.mutex);
499
500 result = device_register(&ps3_system_bus);
501 BUG_ON(result);
502
503 result = bus_register(&ps3_system_bus_type);
504 BUG_ON(result);
505
506 pr_debug(" <- %s:%d\n", __func__, __LINE__);
507 return result;
508 }
509
510 core_initcall(ps3_system_bus_init);
511
512 /* Allocates a contiguous real buffer and creates mappings over it.
513 * Returns the virtual address of the buffer and sets dma_handle
514 * to the dma address (mapping) of the first page.
515 */
ps3_alloc_coherent(struct device * _dev,size_t size,dma_addr_t * dma_handle,gfp_t flag)516 static void * ps3_alloc_coherent(struct device *_dev, size_t size,
517 dma_addr_t *dma_handle, gfp_t flag)
518 {
519 int result;
520 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
521 unsigned long virt_addr;
522
523 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
524 flag |= __GFP_ZERO;
525
526 virt_addr = __get_free_pages(flag, get_order(size));
527
528 if (!virt_addr) {
529 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
530 goto clean_none;
531 }
532
533 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle,
534 IOPTE_PP_W | IOPTE_PP_R | IOPTE_SO_RW | IOPTE_M);
535
536 if (result) {
537 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
538 __func__, __LINE__, result);
539 BUG_ON("check region type");
540 goto clean_alloc;
541 }
542
543 return (void*)virt_addr;
544
545 clean_alloc:
546 free_pages(virt_addr, get_order(size));
547 clean_none:
548 dma_handle = NULL;
549 return NULL;
550 }
551
ps3_free_coherent(struct device * _dev,size_t size,void * vaddr,dma_addr_t dma_handle)552 static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
553 dma_addr_t dma_handle)
554 {
555 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
556
557 ps3_dma_unmap(dev->d_region, dma_handle, size);
558 free_pages((unsigned long)vaddr, get_order(size));
559 }
560
561 /* Creates TCEs for a user provided buffer. The user buffer must be
562 * contiguous real kernel storage (not vmalloc). The address passed here
563 * comprises a page address and offset into that page. The dma_addr_t
564 * returned will point to the same byte within the page as was passed in.
565 */
566
ps3_sb_map_page(struct device * _dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)567 static dma_addr_t ps3_sb_map_page(struct device *_dev, struct page *page,
568 unsigned long offset, size_t size, enum dma_data_direction direction,
569 struct dma_attrs *attrs)
570 {
571 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
572 int result;
573 dma_addr_t bus_addr;
574 void *ptr = page_address(page) + offset;
575
576 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
577 &bus_addr,
578 IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW | IOPTE_M);
579
580 if (result) {
581 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
582 __func__, __LINE__, result);
583 }
584
585 return bus_addr;
586 }
587
ps3_ioc0_map_page(struct device * _dev,struct page * page,unsigned long offset,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)588 static dma_addr_t ps3_ioc0_map_page(struct device *_dev, struct page *page,
589 unsigned long offset, size_t size,
590 enum dma_data_direction direction,
591 struct dma_attrs *attrs)
592 {
593 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
594 int result;
595 dma_addr_t bus_addr;
596 u64 iopte_flag;
597 void *ptr = page_address(page) + offset;
598
599 iopte_flag = IOPTE_M;
600 switch (direction) {
601 case DMA_BIDIRECTIONAL:
602 iopte_flag |= IOPTE_PP_R | IOPTE_PP_W | IOPTE_SO_RW;
603 break;
604 case DMA_TO_DEVICE:
605 iopte_flag |= IOPTE_PP_R | IOPTE_SO_R;
606 break;
607 case DMA_FROM_DEVICE:
608 iopte_flag |= IOPTE_PP_W | IOPTE_SO_RW;
609 break;
610 default:
611 /* not happned */
612 BUG();
613 };
614 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
615 &bus_addr, iopte_flag);
616
617 if (result) {
618 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
619 __func__, __LINE__, result);
620 }
621 return bus_addr;
622 }
623
ps3_unmap_page(struct device * _dev,dma_addr_t dma_addr,size_t size,enum dma_data_direction direction,struct dma_attrs * attrs)624 static void ps3_unmap_page(struct device *_dev, dma_addr_t dma_addr,
625 size_t size, enum dma_data_direction direction, struct dma_attrs *attrs)
626 {
627 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
628 int result;
629
630 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
631
632 if (result) {
633 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
634 __func__, __LINE__, result);
635 }
636 }
637
ps3_sb_map_sg(struct device * _dev,struct scatterlist * sgl,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)638 static int ps3_sb_map_sg(struct device *_dev, struct scatterlist *sgl,
639 int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
640 {
641 #if defined(CONFIG_PS3_DYNAMIC_DMA)
642 BUG_ON("do");
643 return -EPERM;
644 #else
645 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
646 struct scatterlist *sg;
647 int i;
648
649 for_each_sg(sgl, sg, nents, i) {
650 int result = ps3_dma_map(dev->d_region, sg_phys(sg),
651 sg->length, &sg->dma_address, 0);
652
653 if (result) {
654 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
655 __func__, __LINE__, result);
656 return -EINVAL;
657 }
658
659 sg->dma_length = sg->length;
660 }
661
662 return nents;
663 #endif
664 }
665
ps3_ioc0_map_sg(struct device * _dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)666 static int ps3_ioc0_map_sg(struct device *_dev, struct scatterlist *sg,
667 int nents,
668 enum dma_data_direction direction,
669 struct dma_attrs *attrs)
670 {
671 BUG();
672 return 0;
673 }
674
ps3_sb_unmap_sg(struct device * _dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)675 static void ps3_sb_unmap_sg(struct device *_dev, struct scatterlist *sg,
676 int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
677 {
678 #if defined(CONFIG_PS3_DYNAMIC_DMA)
679 BUG_ON("do");
680 #endif
681 }
682
ps3_ioc0_unmap_sg(struct device * _dev,struct scatterlist * sg,int nents,enum dma_data_direction direction,struct dma_attrs * attrs)683 static void ps3_ioc0_unmap_sg(struct device *_dev, struct scatterlist *sg,
684 int nents, enum dma_data_direction direction,
685 struct dma_attrs *attrs)
686 {
687 BUG();
688 }
689
ps3_dma_supported(struct device * _dev,u64 mask)690 static int ps3_dma_supported(struct device *_dev, u64 mask)
691 {
692 return mask >= DMA_32BIT_MASK;
693 }
694
695 static struct dma_mapping_ops ps3_sb_dma_ops = {
696 .alloc_coherent = ps3_alloc_coherent,
697 .free_coherent = ps3_free_coherent,
698 .map_sg = ps3_sb_map_sg,
699 .unmap_sg = ps3_sb_unmap_sg,
700 .dma_supported = ps3_dma_supported,
701 .map_page = ps3_sb_map_page,
702 .unmap_page = ps3_unmap_page,
703 };
704
705 static struct dma_mapping_ops ps3_ioc0_dma_ops = {
706 .alloc_coherent = ps3_alloc_coherent,
707 .free_coherent = ps3_free_coherent,
708 .map_sg = ps3_ioc0_map_sg,
709 .unmap_sg = ps3_ioc0_unmap_sg,
710 .dma_supported = ps3_dma_supported,
711 .map_page = ps3_ioc0_map_page,
712 .unmap_page = ps3_unmap_page,
713 };
714
715 /**
716 * ps3_system_bus_release_device - remove a device from the system bus
717 */
718
ps3_system_bus_release_device(struct device * _dev)719 static void ps3_system_bus_release_device(struct device *_dev)
720 {
721 struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
722 kfree(dev);
723 }
724
725 /**
726 * ps3_system_bus_device_register - add a device to the system bus
727 *
728 * ps3_system_bus_device_register() expects the dev object to be allocated
729 * dynamically by the caller. The system bus takes ownership of the dev
730 * object and frees the object in ps3_system_bus_release_device().
731 */
732
ps3_system_bus_device_register(struct ps3_system_bus_device * dev)733 int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
734 {
735 int result;
736 static unsigned int dev_ioc0_count;
737 static unsigned int dev_sb_count;
738 static unsigned int dev_vuart_count;
739 static unsigned int dev_lpm_count;
740
741 if (!dev->core.parent)
742 dev->core.parent = &ps3_system_bus;
743 dev->core.bus = &ps3_system_bus_type;
744 dev->core.release = ps3_system_bus_release_device;
745
746 switch (dev->dev_type) {
747 case PS3_DEVICE_TYPE_IOC0:
748 dev->core.archdata.dma_ops = &ps3_ioc0_dma_ops;
749 dev_set_name(&dev->core, "ioc0_%02x", ++dev_ioc0_count);
750 break;
751 case PS3_DEVICE_TYPE_SB:
752 dev->core.archdata.dma_ops = &ps3_sb_dma_ops;
753 dev_set_name(&dev->core, "sb_%02x", ++dev_sb_count);
754
755 break;
756 case PS3_DEVICE_TYPE_VUART:
757 dev_set_name(&dev->core, "vuart_%02x", ++dev_vuart_count);
758 break;
759 case PS3_DEVICE_TYPE_LPM:
760 dev_set_name(&dev->core, "lpm_%02x", ++dev_lpm_count);
761 break;
762 default:
763 BUG();
764 };
765
766 dev->core.archdata.of_node = NULL;
767 set_dev_node(&dev->core, 0);
768
769 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev_name(&dev->core));
770
771 result = device_register(&dev->core);
772 return result;
773 }
774
775 EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
776
ps3_system_bus_driver_register(struct ps3_system_bus_driver * drv)777 int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
778 {
779 int result;
780
781 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
782
783 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
784 return -ENODEV;
785
786 drv->core.bus = &ps3_system_bus_type;
787
788 result = driver_register(&drv->core);
789 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
790 return result;
791 }
792
793 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
794
ps3_system_bus_driver_unregister(struct ps3_system_bus_driver * drv)795 void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
796 {
797 pr_debug(" -> %s:%d: %s\n", __func__, __LINE__, drv->core.name);
798 driver_unregister(&drv->core);
799 pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, drv->core.name);
800 }
801
802 EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
803