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Diffstat (limited to 'drivers/ps3/system-bus.c')
-rw-r--r--drivers/ps3/system-bus.c362
1 files changed, 0 insertions, 362 deletions
diff --git a/drivers/ps3/system-bus.c b/drivers/ps3/system-bus.c
deleted file mode 100644
index 468bdbcc722c..000000000000
--- a/drivers/ps3/system-bus.c
+++ /dev/null
@@ -1,362 +0,0 @@
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/ps3.h>
29#include <asm/lv1call.h>
30#include <asm/firmware.h>
31
32#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
33static void _dump_mmio_region(const struct ps3_mmio_region* r,
34 const char* func, int line)
35{
36 pr_debug("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
37 r->did.dev_id);
38 pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
39 pr_debug("%s:%d: len %lxh\n", func, line, r->len);
40 pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
41}
42
43int ps3_mmio_region_create(struct ps3_mmio_region *r)
44{
45 int result;
46
47 result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
48 r->bus_addr, r->len, r->page_size, &r->lpar_addr);
49
50 if (result) {
51 pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
52 __func__, __LINE__, ps3_result(result));
53 r->lpar_addr = 0;
54 }
55
56 dump_mmio_region(r);
57 return result;
58}
59
60int ps3_free_mmio_region(struct ps3_mmio_region *r)
61{
62 int result;
63
64 result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
65 r->lpar_addr);
66
67 if (result)
68 pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
69 __func__, __LINE__, ps3_result(result));
70
71 r->lpar_addr = 0;
72 return result;
73}
74
75static int ps3_system_bus_match(struct device *_dev,
76 struct device_driver *_drv)
77{
78 int result;
79 struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
80 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
81
82 result = dev->match_id == drv->match_id;
83
84 pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
85 dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
86 (result ? "match" : "miss"));
87 return result;
88}
89
90static int ps3_system_bus_probe(struct device *_dev)
91{
92 int result;
93 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
94 struct ps3_system_bus_driver *drv =
95 to_ps3_system_bus_driver(_dev->driver);
96
97 result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);
98
99 if (result) {
100 pr_debug("%s:%d: lv1_open_device failed (%d)\n",
101 __func__, __LINE__, result);
102 result = -EACCES;
103 goto clean_none;
104 }
105
106 if (dev->d_region->did.bus_id) {
107 result = ps3_dma_region_create(dev->d_region);
108
109 if (result) {
110 pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
111 __func__, __LINE__, result);
112 BUG_ON("check region type");
113 result = -EINVAL;
114 goto clean_device;
115 }
116 }
117
118 BUG_ON(!drv);
119
120 if (drv->probe)
121 result = drv->probe(dev);
122 else
123 pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
124 dev->core.bus_id);
125
126 if (result) {
127 pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
128 goto clean_dma;
129 }
130
131 return result;
132
133clean_dma:
134 ps3_dma_region_free(dev->d_region);
135clean_device:
136 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
137clean_none:
138 return result;
139}
140
141static int ps3_system_bus_remove(struct device *_dev)
142{
143 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
144 struct ps3_system_bus_driver *drv =
145 to_ps3_system_bus_driver(_dev->driver);
146
147 if (drv->remove)
148 drv->remove(dev);
149 else
150 pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
151 dev->core.bus_id);
152
153 ps3_dma_region_free(dev->d_region);
154 ps3_free_mmio_region(dev->m_region);
155 lv1_close_device(dev->did.bus_id, dev->did.dev_id);
156
157 return 0;
158}
159
160struct bus_type ps3_system_bus_type = {
161 .name = "ps3_system_bus",
162 .match = ps3_system_bus_match,
163 .probe = ps3_system_bus_probe,
164 .remove = ps3_system_bus_remove,
165};
166
167int __init ps3_system_bus_init(void)
168{
169 int result;
170
171 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
172 return 0;
173
174 result = bus_register(&ps3_system_bus_type);
175 BUG_ON(result);
176 return result;
177}
178
179core_initcall(ps3_system_bus_init);
180
181/* Allocates a contiguous real buffer and creates mappings over it.
182 * Returns the virtual address of the buffer and sets dma_handle
183 * to the dma address (mapping) of the first page.
184 */
185
186static void * ps3_alloc_coherent(struct device *_dev, size_t size,
187 dma_addr_t *dma_handle, gfp_t flag)
188{
189 int result;
190 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
191 unsigned long virt_addr;
192
193 BUG_ON(!dev->d_region->bus_addr);
194
195 flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
196 flag |= __GFP_ZERO;
197
198 virt_addr = __get_free_pages(flag, get_order(size));
199
200 if (!virt_addr) {
201 pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
202 goto clean_none;
203 }
204
205 result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);
206
207 if (result) {
208 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
209 __func__, __LINE__, result);
210 BUG_ON("check region type");
211 goto clean_alloc;
212 }
213
214 return (void*)virt_addr;
215
216clean_alloc:
217 free_pages(virt_addr, get_order(size));
218clean_none:
219 dma_handle = NULL;
220 return NULL;
221}
222
223static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
224 dma_addr_t dma_handle)
225{
226 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
227
228 ps3_dma_unmap(dev->d_region, dma_handle, size);
229 free_pages((unsigned long)vaddr, get_order(size));
230}
231
232/* Creates TCEs for a user provided buffer. The user buffer must be
233 * contiguous real kernel storage (not vmalloc). The address of the buffer
234 * passed here is the kernel (virtual) address of the buffer. The buffer
235 * need not be page aligned, the dma_addr_t returned will point to the same
236 * byte within the page as vaddr.
237 */
238
239static dma_addr_t ps3_map_single(struct device *_dev, void *ptr, size_t size,
240 enum dma_data_direction direction)
241{
242 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
243 int result;
244 unsigned long bus_addr;
245
246 result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
247 &bus_addr);
248
249 if (result) {
250 pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
251 __func__, __LINE__, result);
252 }
253
254 return bus_addr;
255}
256
257static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
258 size_t size, enum dma_data_direction direction)
259{
260 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
261 int result;
262
263 result = ps3_dma_unmap(dev->d_region, dma_addr, size);
264
265 if (result) {
266 pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
267 __func__, __LINE__, result);
268 }
269}
270
271static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
272 enum dma_data_direction direction)
273{
274#if defined(CONFIG_PS3_DYNAMIC_DMA)
275 BUG_ON("do");
276#endif
277 return 0;
278}
279
280static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg,
281 int nents, enum dma_data_direction direction)
282{
283#if defined(CONFIG_PS3_DYNAMIC_DMA)
284 BUG_ON("do");
285#endif
286}
287
288static int ps3_dma_supported(struct device *_dev, u64 mask)
289{
290 return 1;
291}
292
293static struct dma_mapping_ops ps3_dma_ops = {
294 .alloc_coherent = ps3_alloc_coherent,
295 .free_coherent = ps3_free_coherent,
296 .map_single = ps3_map_single,
297 .unmap_single = ps3_unmap_single,
298 .map_sg = ps3_map_sg,
299 .unmap_sg = ps3_unmap_sg,
300 .dma_supported = ps3_dma_supported
301};
302
303/**
304 * ps3_system_bus_release_device - remove a device from the system bus
305 */
306
307static void ps3_system_bus_release_device(struct device *_dev)
308{
309 struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
310 kfree(dev);
311}
312
313/**
314 * ps3_system_bus_device_register - add a device to the system bus
315 *
316 * ps3_system_bus_device_register() expects the dev object to be allocated
317 * dynamically by the caller. The system bus takes ownership of the dev
318 * object and frees the object in ps3_system_bus_release_device().
319 */
320
321int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
322{
323 int result;
324 static unsigned int dev_count = 1;
325
326 dev->core.parent = NULL;
327 dev->core.bus = &ps3_system_bus_type;
328 dev->core.release = ps3_system_bus_release_device;
329
330 dev->core.archdata.of_node = NULL;
331 dev->core.archdata.dma_ops = &ps3_dma_ops;
332 dev->core.archdata.numa_node = 0;
333
334 snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
335 dev_count++);
336
337 pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
338
339 result = device_register(&dev->core);
340 return result;
341}
342
343EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
344
345int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
346{
347 int result;
348
349 drv->core.bus = &ps3_system_bus_type;
350
351 result = driver_register(&drv->core);
352 return result;
353}
354
355EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
356
357void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
358{
359 driver_unregister(&drv->core);
360}
361
362EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
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