1/*
2 * Copyright (C) 2009 Nokia Corporation
3 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
4 *
5 * Some code and ideas taken from drivers/video/omap/ driver
6 * by Imre Deak.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program.  If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#define DSS_SUBSYS_NAME "DISPLAY"
22
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/platform_device.h>
26#include <linux/sysfs.h>
27
28#include <video/omapdss.h>
29#include "dss.h"
30
31static ssize_t display_name_show(struct omap_dss_device *dssdev, char *buf)
32{
33	return snprintf(buf, PAGE_SIZE, "%s\n",
34			dssdev->name ?
35			dssdev->name : "");
36}
37
38static ssize_t display_enabled_show(struct omap_dss_device *dssdev, char *buf)
39{
40	return snprintf(buf, PAGE_SIZE, "%d\n",
41			omapdss_device_is_enabled(dssdev));
42}
43
44static ssize_t display_enabled_store(struct omap_dss_device *dssdev,
45		const char *buf, size_t size)
46{
47	int r;
48	bool enable;
49
50	r = strtobool(buf, &enable);
51	if (r)
52		return r;
53
54	if (enable == omapdss_device_is_enabled(dssdev))
55		return size;
56
57	if (omapdss_device_is_connected(dssdev) == false)
58		return -ENODEV;
59
60	if (enable) {
61		r = dssdev->driver->enable(dssdev);
62		if (r)
63			return r;
64	} else {
65		dssdev->driver->disable(dssdev);
66	}
67
68	return size;
69}
70
71static ssize_t display_tear_show(struct omap_dss_device *dssdev, char *buf)
72{
73	return snprintf(buf, PAGE_SIZE, "%d\n",
74			dssdev->driver->get_te ?
75			dssdev->driver->get_te(dssdev) : 0);
76}
77
78static ssize_t display_tear_store(struct omap_dss_device *dssdev,
79	const char *buf, size_t size)
80{
81	int r;
82	bool te;
83
84	if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
85		return -ENOENT;
86
87	r = strtobool(buf, &te);
88	if (r)
89		return r;
90
91	r = dssdev->driver->enable_te(dssdev, te);
92	if (r)
93		return r;
94
95	return size;
96}
97
98static ssize_t display_timings_show(struct omap_dss_device *dssdev, char *buf)
99{
100	struct omap_video_timings t;
101
102	if (!dssdev->driver->get_timings)
103		return -ENOENT;
104
105	dssdev->driver->get_timings(dssdev, &t);
106
107	return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
108			t.pixelclock,
109			t.x_res, t.hfp, t.hbp, t.hsw,
110			t.y_res, t.vfp, t.vbp, t.vsw);
111}
112
113static ssize_t display_timings_store(struct omap_dss_device *dssdev,
114	const char *buf, size_t size)
115{
116	struct omap_video_timings t = dssdev->panel.timings;
117	int r, found;
118
119	if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
120		return -ENOENT;
121
122	found = 0;
123#ifdef CONFIG_OMAP2_DSS_VENC
124	if (strncmp("pal", buf, 3) == 0) {
125		t = omap_dss_pal_timings;
126		found = 1;
127	} else if (strncmp("ntsc", buf, 4) == 0) {
128		t = omap_dss_ntsc_timings;
129		found = 1;
130	}
131#endif
132	if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
133				&t.pixelclock,
134				&t.x_res, &t.hfp, &t.hbp, &t.hsw,
135				&t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
136		return -EINVAL;
137
138	r = dssdev->driver->check_timings(dssdev, &t);
139	if (r)
140		return r;
141
142	dssdev->driver->disable(dssdev);
143	dssdev->driver->set_timings(dssdev, &t);
144	r = dssdev->driver->enable(dssdev);
145	if (r)
146		return r;
147
148	return size;
149}
150
151static ssize_t display_rotate_show(struct omap_dss_device *dssdev, char *buf)
152{
153	int rotate;
154	if (!dssdev->driver->get_rotate)
155		return -ENOENT;
156	rotate = dssdev->driver->get_rotate(dssdev);
157	return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
158}
159
160static ssize_t display_rotate_store(struct omap_dss_device *dssdev,
161	const char *buf, size_t size)
162{
163	int rot, r;
164
165	if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
166		return -ENOENT;
167
168	r = kstrtoint(buf, 0, &rot);
169	if (r)
170		return r;
171
172	r = dssdev->driver->set_rotate(dssdev, rot);
173	if (r)
174		return r;
175
176	return size;
177}
178
179static ssize_t display_mirror_show(struct omap_dss_device *dssdev, char *buf)
180{
181	int mirror;
182	if (!dssdev->driver->get_mirror)
183		return -ENOENT;
184	mirror = dssdev->driver->get_mirror(dssdev);
185	return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
186}
187
188static ssize_t display_mirror_store(struct omap_dss_device *dssdev,
189	const char *buf, size_t size)
190{
191	int r;
192	bool mirror;
193
194	if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
195		return -ENOENT;
196
197	r = strtobool(buf, &mirror);
198	if (r)
199		return r;
200
201	r = dssdev->driver->set_mirror(dssdev, mirror);
202	if (r)
203		return r;
204
205	return size;
206}
207
208static ssize_t display_wss_show(struct omap_dss_device *dssdev, char *buf)
209{
210	unsigned int wss;
211
212	if (!dssdev->driver->get_wss)
213		return -ENOENT;
214
215	wss = dssdev->driver->get_wss(dssdev);
216
217	return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
218}
219
220static ssize_t display_wss_store(struct omap_dss_device *dssdev,
221	const char *buf, size_t size)
222{
223	u32 wss;
224	int r;
225
226	if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
227		return -ENOENT;
228
229	r = kstrtou32(buf, 0, &wss);
230	if (r)
231		return r;
232
233	if (wss > 0xfffff)
234		return -EINVAL;
235
236	r = dssdev->driver->set_wss(dssdev, wss);
237	if (r)
238		return r;
239
240	return size;
241}
242
243struct display_attribute {
244	struct attribute attr;
245	ssize_t (*show)(struct omap_dss_device *, char *);
246	ssize_t	(*store)(struct omap_dss_device *, const char *, size_t);
247};
248
249#define DISPLAY_ATTR(_name, _mode, _show, _store) \
250	struct display_attribute display_attr_##_name = \
251	__ATTR(_name, _mode, _show, _store)
252
253static DISPLAY_ATTR(name, S_IRUGO, display_name_show, NULL);
254static DISPLAY_ATTR(display_name, S_IRUGO, display_name_show, NULL);
255static DISPLAY_ATTR(enabled, S_IRUGO|S_IWUSR,
256		display_enabled_show, display_enabled_store);
257static DISPLAY_ATTR(tear_elim, S_IRUGO|S_IWUSR,
258		display_tear_show, display_tear_store);
259static DISPLAY_ATTR(timings, S_IRUGO|S_IWUSR,
260		display_timings_show, display_timings_store);
261static DISPLAY_ATTR(rotate, S_IRUGO|S_IWUSR,
262		display_rotate_show, display_rotate_store);
263static DISPLAY_ATTR(mirror, S_IRUGO|S_IWUSR,
264		display_mirror_show, display_mirror_store);
265static DISPLAY_ATTR(wss, S_IRUGO|S_IWUSR,
266		display_wss_show, display_wss_store);
267
268static struct attribute *display_sysfs_attrs[] = {
269	&display_attr_name.attr,
270	&display_attr_display_name.attr,
271	&display_attr_enabled.attr,
272	&display_attr_tear_elim.attr,
273	&display_attr_timings.attr,
274	&display_attr_rotate.attr,
275	&display_attr_mirror.attr,
276	&display_attr_wss.attr,
277	NULL
278};
279
280static ssize_t display_attr_show(struct kobject *kobj, struct attribute *attr,
281		char *buf)
282{
283	struct omap_dss_device *dssdev;
284	struct display_attribute *display_attr;
285
286	dssdev = container_of(kobj, struct omap_dss_device, kobj);
287	display_attr = container_of(attr, struct display_attribute, attr);
288
289	if (!display_attr->show)
290		return -ENOENT;
291
292	return display_attr->show(dssdev, buf);
293}
294
295static ssize_t display_attr_store(struct kobject *kobj, struct attribute *attr,
296		const char *buf, size_t size)
297{
298	struct omap_dss_device *dssdev;
299	struct display_attribute *display_attr;
300
301	dssdev = container_of(kobj, struct omap_dss_device, kobj);
302	display_attr = container_of(attr, struct display_attribute, attr);
303
304	if (!display_attr->store)
305		return -ENOENT;
306
307	return display_attr->store(dssdev, buf, size);
308}
309
310static const struct sysfs_ops display_sysfs_ops = {
311	.show = display_attr_show,
312	.store = display_attr_store,
313};
314
315static struct kobj_type display_ktype = {
316	.sysfs_ops = &display_sysfs_ops,
317	.default_attrs = display_sysfs_attrs,
318};
319
320int display_init_sysfs(struct platform_device *pdev)
321{
322	struct omap_dss_device *dssdev = NULL;
323	int r;
324
325	for_each_dss_dev(dssdev) {
326		r = kobject_init_and_add(&dssdev->kobj, &display_ktype,
327			&pdev->dev.kobj, dssdev->alias);
328		if (r) {
329			DSSERR("failed to create sysfs files\n");
330			omap_dss_put_device(dssdev);
331			goto err;
332		}
333	}
334
335	return 0;
336
337err:
338	display_uninit_sysfs(pdev);
339
340	return r;
341}
342
343void display_uninit_sysfs(struct platform_device *pdev)
344{
345	struct omap_dss_device *dssdev = NULL;
346
347	for_each_dss_dev(dssdev) {
348		if (kobject_name(&dssdev->kobj) == NULL)
349			continue;
350
351		kobject_del(&dssdev->kobj);
352		kobject_put(&dssdev->kobj);
353
354		memset(&dssdev->kobj, 0, sizeof(dssdev->kobj));
355	}
356}
357