1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
|
// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
/*
* Copyright (C) 2024 Amlogic, Inc. All rights reserved
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-mc.h>
#include "c3-isp-common.h"
#include "c3-isp-regs.h"
u32 c3_isp_read(struct c3_isp_device *isp, u32 reg)
{
return readl(isp->base + reg);
}
void c3_isp_write(struct c3_isp_device *isp, u32 reg, u32 val)
{
writel(val, isp->base + reg);
}
void c3_isp_update_bits(struct c3_isp_device *isp, u32 reg, u32 mask, u32 val)
{
u32 orig, tmp;
orig = c3_isp_read(isp, reg);
tmp = orig & ~mask;
tmp |= val & mask;
if (tmp != orig)
c3_isp_write(isp, reg, tmp);
}
/* PM runtime suspend */
static int c3_isp_runtime_suspend(struct device *dev)
{
struct c3_isp_device *isp = dev_get_drvdata(dev);
clk_bulk_disable_unprepare(isp->info->clock_num, isp->clks);
return 0;
}
/* PM runtime resume */
static int c3_isp_runtime_resume(struct device *dev)
{
struct c3_isp_device *isp = dev_get_drvdata(dev);
return clk_bulk_prepare_enable(isp->info->clock_num, isp->clks);
}
static const struct dev_pm_ops c3_isp_pm_ops = {
SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
RUNTIME_PM_OPS(c3_isp_runtime_suspend,
c3_isp_runtime_resume, NULL)
};
/* IRQ handling */
static irqreturn_t c3_isp_irq_handler(int irq, void *dev)
{
struct c3_isp_device *isp = dev;
u32 status;
/* Get irq status and clear irq status */
status = c3_isp_read(isp, ISP_TOP_RO_IRQ_STAT);
c3_isp_write(isp, ISP_TOP_IRQ_CLR, status);
if (status & ISP_TOP_RO_IRQ_STAT_FRM_END_MASK) {
c3_isp_stats_isr(isp);
c3_isp_params_isr(isp);
c3_isp_captures_isr(isp);
isp->frm_sequence++;
}
if (status & ISP_TOP_RO_IRQ_STAT_FRM_RST_MASK)
c3_isp_core_queue_sof(isp);
return IRQ_HANDLED;
}
/* Subdev notifier register */
static int c3_isp_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *sd,
struct v4l2_async_connection *asc)
{
struct c3_isp_device *isp =
container_of(notifier, struct c3_isp_device, notifier);
struct media_pad *sink =
&isp->core.sd.entity.pads[C3_ISP_CORE_PAD_SINK_VIDEO];
return v4l2_create_fwnode_links_to_pad(sd, sink, MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
}
static int c3_isp_notify_complete(struct v4l2_async_notifier *notifier)
{
struct c3_isp_device *isp =
container_of(notifier, struct c3_isp_device, notifier);
return v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
}
static const struct v4l2_async_notifier_operations c3_isp_notify_ops = {
.bound = c3_isp_notify_bound,
.complete = c3_isp_notify_complete,
};
static int c3_isp_async_nf_register(struct c3_isp_device *isp)
{
struct v4l2_async_connection *asc;
struct fwnode_handle *ep;
int ret;
v4l2_async_nf_init(&isp->notifier, &isp->v4l2_dev);
ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(isp->dev), 0, 0,
FWNODE_GRAPH_ENDPOINT_NEXT);
if (!ep)
return -ENOTCONN;
asc = v4l2_async_nf_add_fwnode_remote(&isp->notifier, ep,
struct v4l2_async_connection);
fwnode_handle_put(ep);
if (IS_ERR(asc))
return PTR_ERR(asc);
isp->notifier.ops = &c3_isp_notify_ops;
ret = v4l2_async_nf_register(&isp->notifier);
if (ret)
v4l2_async_nf_cleanup(&isp->notifier);
return ret;
}
static void c3_isp_async_nf_unregister(struct c3_isp_device *isp)
{
v4l2_async_nf_unregister(&isp->notifier);
v4l2_async_nf_cleanup(&isp->notifier);
}
static int c3_isp_media_register(struct c3_isp_device *isp)
{
struct media_device *media_dev = &isp->media_dev;
struct v4l2_device *v4l2_dev = &isp->v4l2_dev;
int ret;
/* Initialize media device */
strscpy(media_dev->model, C3_ISP_DRIVER_NAME, sizeof(media_dev->model));
media_dev->dev = isp->dev;
media_device_init(media_dev);
/* Initialize v4l2 device */
v4l2_dev->mdev = media_dev;
strscpy(v4l2_dev->name, C3_ISP_DRIVER_NAME, sizeof(v4l2_dev->name));
ret = v4l2_device_register(isp->dev, v4l2_dev);
if (ret)
goto err_media_dev_cleanup;
ret = media_device_register(&isp->media_dev);
if (ret) {
dev_err(isp->dev, "Failed to register media device: %d\n", ret);
goto err_unreg_v4l2_dev;
}
return 0;
err_unreg_v4l2_dev:
v4l2_device_unregister(&isp->v4l2_dev);
err_media_dev_cleanup:
media_device_cleanup(media_dev);
return ret;
}
static void c3_isp_media_unregister(struct c3_isp_device *isp)
{
media_device_unregister(&isp->media_dev);
v4l2_device_unregister(&isp->v4l2_dev);
media_device_cleanup(&isp->media_dev);
}
static void c3_isp_remove_links(struct c3_isp_device *isp)
{
unsigned int i;
media_entity_remove_links(&isp->core.sd.entity);
for (i = 0; i < C3_ISP_NUM_RSZ; i++)
media_entity_remove_links(&isp->resizers[i].sd.entity);
for (i = 0; i < C3_ISP_NUM_CAP_DEVS; i++)
media_entity_remove_links(&isp->caps[i].vdev.entity);
}
static int c3_isp_create_links(struct c3_isp_device *isp)
{
unsigned int i;
int ret;
for (i = 0; i < C3_ISP_NUM_RSZ; i++) {
ret = media_create_pad_link(&isp->resizers[i].sd.entity,
C3_ISP_RSZ_PAD_SOURCE,
&isp->caps[i].vdev.entity, 0,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret) {
dev_err(isp->dev,
"Failed to link rsz %u and cap %u\n", i, i);
goto err_remove_links;
}
ret = media_create_pad_link(&isp->core.sd.entity,
C3_ISP_CORE_PAD_SOURCE_VIDEO_0 + i,
&isp->resizers[i].sd.entity,
C3_ISP_RSZ_PAD_SINK,
MEDIA_LNK_FL_ENABLED);
if (ret) {
dev_err(isp->dev,
"Failed to link core and rsz %u\n", i);
goto err_remove_links;
}
}
ret = media_create_pad_link(&isp->core.sd.entity,
C3_ISP_CORE_PAD_SOURCE_STATS,
&isp->stats.vdev.entity,
0, MEDIA_LNK_FL_ENABLED);
if (ret) {
dev_err(isp->dev, "Failed to link core and stats\n");
goto err_remove_links;
}
ret = media_create_pad_link(&isp->params.vdev.entity, 0,
&isp->core.sd.entity,
C3_ISP_CORE_PAD_SINK_PARAMS,
MEDIA_LNK_FL_ENABLED);
if (ret) {
dev_err(isp->dev, "Failed to link params and core\n");
goto err_remove_links;
}
return 0;
err_remove_links:
c3_isp_remove_links(isp);
return ret;
}
static int c3_isp_videos_register(struct c3_isp_device *isp)
{
int ret;
ret = c3_isp_captures_register(isp);
if (ret)
return ret;
ret = c3_isp_stats_register(isp);
if (ret)
goto err_captures_unregister;
ret = c3_isp_params_register(isp);
if (ret)
goto err_stats_unregister;
ret = c3_isp_create_links(isp);
if (ret)
goto err_params_unregister;
return 0;
err_params_unregister:
c3_isp_params_unregister(isp);
err_stats_unregister:
c3_isp_stats_unregister(isp);
err_captures_unregister:
c3_isp_captures_unregister(isp);
return ret;
}
static void c3_isp_videos_unregister(struct c3_isp_device *isp)
{
c3_isp_remove_links(isp);
c3_isp_params_unregister(isp);
c3_isp_stats_unregister(isp);
c3_isp_captures_unregister(isp);
}
static int c3_isp_get_clocks(struct c3_isp_device *isp)
{
const struct c3_isp_info *info = isp->info;
for (unsigned int i = 0; i < info->clock_num; i++)
isp->clks[i].id = info->clocks[i];
return devm_clk_bulk_get(isp->dev, info->clock_num, isp->clks);
}
static int c3_isp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct c3_isp_device *isp;
int irq;
int ret;
isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
if (!isp)
return -ENOMEM;
isp->info = of_device_get_match_data(dev);
isp->dev = dev;
isp->base = devm_platform_ioremap_resource_byname(pdev, "isp");
if (IS_ERR(isp->base))
return dev_err_probe(dev, PTR_ERR(isp->base),
"Failed to ioremap resource\n");
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = c3_isp_get_clocks(isp);
if (ret)
return dev_err_probe(dev, ret, "Failed to get clocks\n");
platform_set_drvdata(pdev, isp);
pm_runtime_enable(dev);
ret = c3_isp_media_register(isp);
if (ret)
goto err_runtime_disable;
ret = c3_isp_core_register(isp);
if (ret)
goto err_v4l2_unregister;
ret = c3_isp_resizers_register(isp);
if (ret)
goto err_core_unregister;
ret = c3_isp_async_nf_register(isp);
if (ret)
goto err_resizers_unregister;
ret = devm_request_irq(dev, irq,
c3_isp_irq_handler, IRQF_SHARED,
dev_driver_string(dev), isp);
if (ret)
goto err_nf_unregister;
ret = c3_isp_videos_register(isp);
if (ret)
goto err_nf_unregister;
return 0;
err_nf_unregister:
c3_isp_async_nf_unregister(isp);
err_resizers_unregister:
c3_isp_resizers_unregister(isp);
err_core_unregister:
c3_isp_core_unregister(isp);
err_v4l2_unregister:
c3_isp_media_unregister(isp);
err_runtime_disable:
pm_runtime_disable(dev);
return ret;
};
static void c3_isp_remove(struct platform_device *pdev)
{
struct c3_isp_device *isp = platform_get_drvdata(pdev);
c3_isp_videos_unregister(isp);
c3_isp_async_nf_unregister(isp);
c3_isp_core_unregister(isp);
c3_isp_resizers_unregister(isp);
c3_isp_media_unregister(isp);
pm_runtime_disable(isp->dev);
};
static const struct c3_isp_info isp_info = {
.clocks = {"vapb", "isp0"},
.clock_num = 2
};
static const struct of_device_id c3_isp_of_match[] = {
{ .compatible = "amlogic,c3-isp",
.data = &isp_info },
{ },
};
MODULE_DEVICE_TABLE(of, c3_isp_of_match);
static struct platform_driver c3_isp_driver = {
.probe = c3_isp_probe,
.remove = c3_isp_remove,
.driver = {
.name = "c3-isp",
.of_match_table = c3_isp_of_match,
.pm = pm_ptr(&c3_isp_pm_ops),
},
};
module_platform_driver(c3_isp_driver);
MODULE_AUTHOR("Keke Li <keke.li@amlogic.com>");
MODULE_DESCRIPTION("Amlogic C3 ISP pipeline");
MODULE_LICENSE("GPL");
|
