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
|
/*
* Driver for Renesas R-Car VIN
*
* Copyright (C) 2016 Renesas Electronics Corp.
* Copyright (C) 2011-2013 Renesas Solutions Corp.
* Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
* Copyright (C) 2008 Magnus Damm
*
* Based on the soc-camera rcar_vin driver
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-of.h>
#include "rcar-vin.h"
/* -----------------------------------------------------------------------------
* Async notifier
*/
#define notifier_to_vin(n) container_of(n, struct rvin_dev, notifier)
static bool rvin_mbus_supported(struct rvin_graph_entity *entity)
{
struct v4l2_subdev *sd = entity->subdev;
struct v4l2_subdev_mbus_code_enum code = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
code.index = 0;
while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) {
code.index++;
switch (code.code) {
case MEDIA_BUS_FMT_YUYV8_1X16:
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY10_2X10:
case MEDIA_BUS_FMT_RGB888_1X24:
entity->code = code.code;
return true;
default:
break;
}
}
return false;
}
static int rvin_digital_notify_complete(struct v4l2_async_notifier *notifier)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
int ret;
/* Verify subdevices mbus format */
if (!rvin_mbus_supported(&vin->digital)) {
vin_err(vin, "Unsupported media bus format for %s\n",
vin->digital.subdev->name);
return -EINVAL;
}
vin_dbg(vin, "Found media bus format for %s: %d\n",
vin->digital.subdev->name, vin->digital.code);
ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev);
if (ret < 0) {
vin_err(vin, "Failed to register subdev nodes\n");
return ret;
}
return rvin_v4l2_probe(vin);
}
static void rvin_digital_notify_unbind(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
if (vin->digital.subdev == subdev) {
vin_dbg(vin, "unbind digital subdev %s\n", subdev->name);
rvin_v4l2_remove(vin);
vin->digital.subdev = NULL;
return;
}
vin_err(vin, "no entity for subdev %s to unbind\n", subdev->name);
}
static int rvin_digital_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct rvin_dev *vin = notifier_to_vin(notifier);
v4l2_set_subdev_hostdata(subdev, vin);
if (vin->digital.asd.match.of.node == subdev->dev->of_node) {
vin_dbg(vin, "bound digital subdev %s\n", subdev->name);
vin->digital.subdev = subdev;
return 0;
}
vin_err(vin, "no entity for subdev %s to bind\n", subdev->name);
return -EINVAL;
}
static int rvin_digitial_parse_v4l2(struct rvin_dev *vin,
struct device_node *ep,
struct v4l2_mbus_config *mbus_cfg)
{
struct v4l2_of_endpoint v4l2_ep;
int ret;
ret = v4l2_of_parse_endpoint(ep, &v4l2_ep);
if (ret) {
vin_err(vin, "Could not parse v4l2 endpoint\n");
return -EINVAL;
}
mbus_cfg->type = v4l2_ep.bus_type;
switch (mbus_cfg->type) {
case V4L2_MBUS_PARALLEL:
vin_dbg(vin, "Found PARALLEL media bus\n");
mbus_cfg->flags = v4l2_ep.bus.parallel.flags;
break;
case V4L2_MBUS_BT656:
vin_dbg(vin, "Found BT656 media bus\n");
mbus_cfg->flags = 0;
break;
default:
vin_err(vin, "Unknown media bus type\n");
return -EINVAL;
}
return 0;
}
static int rvin_digital_graph_parse(struct rvin_dev *vin)
{
struct device_node *ep, *np;
int ret;
vin->digital.asd.match.of.node = NULL;
vin->digital.subdev = NULL;
/*
* Port 0 id 0 is local digital input, try to get it.
* Not all instances can or will have this, that is OK
*/
ep = of_graph_get_endpoint_by_regs(vin->dev->of_node, 0, 0);
if (!ep)
return 0;
np = of_graph_get_remote_port_parent(ep);
if (!np) {
vin_err(vin, "No remote parent for digital input\n");
of_node_put(ep);
return -EINVAL;
}
of_node_put(np);
ret = rvin_digitial_parse_v4l2(vin, ep, &vin->digital.mbus_cfg);
of_node_put(ep);
if (ret)
return ret;
vin->digital.asd.match.of.node = np;
vin->digital.asd.match_type = V4L2_ASYNC_MATCH_OF;
return 0;
}
static int rvin_digital_graph_init(struct rvin_dev *vin)
{
struct v4l2_async_subdev **subdevs = NULL;
int ret;
ret = rvin_digital_graph_parse(vin);
if (ret)
return ret;
if (!vin->digital.asd.match.of.node) {
vin_dbg(vin, "No digital subdevice found\n");
return -ENODEV;
}
/* Register the subdevices notifier. */
subdevs = devm_kzalloc(vin->dev, sizeof(*subdevs), GFP_KERNEL);
if (subdevs == NULL)
return -ENOMEM;
subdevs[0] = &vin->digital.asd;
vin_dbg(vin, "Found digital subdevice %s\n",
of_node_full_name(subdevs[0]->match.of.node));
vin->notifier.num_subdevs = 1;
vin->notifier.subdevs = subdevs;
vin->notifier.bound = rvin_digital_notify_bound;
vin->notifier.unbind = rvin_digital_notify_unbind;
vin->notifier.complete = rvin_digital_notify_complete;
ret = v4l2_async_notifier_register(&vin->v4l2_dev, &vin->notifier);
if (ret < 0) {
vin_err(vin, "Notifier registration failed\n");
return ret;
}
return 0;
}
/* -----------------------------------------------------------------------------
* Platform Device Driver
*/
static const struct of_device_id rvin_of_id_table[] = {
{ .compatible = "renesas,vin-r8a7794", .data = (void *)RCAR_GEN2 },
{ .compatible = "renesas,vin-r8a7793", .data = (void *)RCAR_GEN2 },
{ .compatible = "renesas,vin-r8a7791", .data = (void *)RCAR_GEN2 },
{ .compatible = "renesas,vin-r8a7790", .data = (void *)RCAR_GEN2 },
{ .compatible = "renesas,vin-r8a7779", .data = (void *)RCAR_H1 },
{ .compatible = "renesas,vin-r8a7778", .data = (void *)RCAR_M1 },
{ },
};
MODULE_DEVICE_TABLE(of, rvin_of_id_table);
static int rcar_vin_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct rvin_dev *vin;
struct resource *mem;
int irq, ret;
vin = devm_kzalloc(&pdev->dev, sizeof(*vin), GFP_KERNEL);
if (!vin)
return -ENOMEM;
match = of_match_device(of_match_ptr(rvin_of_id_table), &pdev->dev);
if (!match)
return -ENODEV;
vin->dev = &pdev->dev;
vin->chip = (enum chip_id)match->data;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (mem == NULL)
return -EINVAL;
vin->base = devm_ioremap_resource(vin->dev, mem);
if (IS_ERR(vin->base))
return PTR_ERR(vin->base);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = rvin_dma_probe(vin, irq);
if (ret)
return ret;
ret = rvin_digital_graph_init(vin);
if (ret < 0)
goto error;
pm_suspend_ignore_children(&pdev->dev, true);
pm_runtime_enable(&pdev->dev);
platform_set_drvdata(pdev, vin);
return 0;
error:
rvin_dma_remove(vin);
return ret;
}
static int rcar_vin_remove(struct platform_device *pdev)
{
struct rvin_dev *vin = platform_get_drvdata(pdev);
pm_runtime_disable(&pdev->dev);
v4l2_async_notifier_unregister(&vin->notifier);
rvin_dma_remove(vin);
return 0;
}
static struct platform_driver rcar_vin_driver = {
.driver = {
.name = "rcar-vin",
.of_match_table = rvin_of_id_table,
},
.probe = rcar_vin_probe,
.remove = rcar_vin_remove,
};
module_platform_driver(rcar_vin_driver);
MODULE_AUTHOR("Niklas Söderlund <niklas.soderlund@ragnatech.se>");
MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");
MODULE_LICENSE("GPL v2");
|