Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * linux/drivers/video/omap2/dss/core.c
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6 *
7 * Some code and ideas taken from drivers/video/omap/ driver
8 * by Imre Deak.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23#define DSS_SUBSYS_NAME "CORE"
24
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/clk.h>
28#include <linux/err.h>
29#include <linux/platform_device.h>
30#include <linux/seq_file.h>
31#include <linux/debugfs.h>
32#include <linux/io.h>
33#include <linux/device.h>
34#include <linux/regulator/consumer.h>
35#include <linux/suspend.h>
36#include <linux/slab.h>
37
38#include <video/omapdss.h>
39
40#include "dss.h"
41#include "dss_features.h"
42
43static struct {
44 struct platform_device *pdev;
45
46 const char *default_display_name;
47} core;
48
49static char *def_disp_name;
50module_param_named(def_disp, def_disp_name, charp, 0);
51MODULE_PARM_DESC(def_disp, "default display name");
52
53const char *omapdss_get_default_display_name(void)
54{
55 return core.default_display_name;
56}
57EXPORT_SYMBOL(omapdss_get_default_display_name);
58
59enum omapdss_version omapdss_get_version(void)
60{
61 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
62 return pdata->version;
63}
64EXPORT_SYMBOL(omapdss_get_version);
65
66struct platform_device *dss_get_core_pdev(void)
67{
68 return core.pdev;
69}
70
71int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
72{
73 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
74
75 if (!board_data->dsi_enable_pads)
76 return -ENOENT;
77
78 return board_data->dsi_enable_pads(dsi_id, lane_mask);
79}
80
81void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
82{
83 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
84
85 if (!board_data->dsi_disable_pads)
86 return;
87
88 return board_data->dsi_disable_pads(dsi_id, lane_mask);
89}
90
91int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
92{
93 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
94
95 if (pdata->set_min_bus_tput)
96 return pdata->set_min_bus_tput(dev, tput);
97 else
98 return 0;
99}
100
101#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
102static int dss_debug_show(struct seq_file *s, void *unused)
103{
104 void (*func)(struct seq_file *) = s->private;
105 func(s);
106 return 0;
107}
108
109static int dss_debug_open(struct inode *inode, struct file *file)
110{
111 return single_open(file, dss_debug_show, inode->i_private);
112}
113
114static const struct file_operations dss_debug_fops = {
115 .open = dss_debug_open,
116 .read = seq_read,
117 .llseek = seq_lseek,
118 .release = single_release,
119};
120
121static struct dentry *dss_debugfs_dir;
122
123static int dss_initialize_debugfs(void)
124{
125 dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
126 if (IS_ERR(dss_debugfs_dir)) {
127 int err = PTR_ERR(dss_debugfs_dir);
128 dss_debugfs_dir = NULL;
129 return err;
130 }
131
132 debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
133 &dss_debug_dump_clocks, &dss_debug_fops);
134
135 return 0;
136}
137
138static void dss_uninitialize_debugfs(void)
139{
140 if (dss_debugfs_dir)
141 debugfs_remove_recursive(dss_debugfs_dir);
142}
143
144int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
145{
146 struct dentry *d;
147
148 d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
149 write, &dss_debug_fops);
150
151 return PTR_ERR_OR_ZERO(d);
152}
153#else /* CONFIG_OMAP2_DSS_DEBUGFS */
154static inline int dss_initialize_debugfs(void)
155{
156 return 0;
157}
158static inline void dss_uninitialize_debugfs(void)
159{
160}
161int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
162{
163 return 0;
164}
165#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
166
167/* PLATFORM DEVICE */
168
169static void dss_disable_all_devices(void)
170{
171 struct omap_dss_device *dssdev = NULL;
172
173 for_each_dss_dev(dssdev) {
174 if (!dssdev->driver)
175 continue;
176
177 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
178 dssdev->driver->disable(dssdev);
179 }
180}
181
182static int __init omap_dss_probe(struct platform_device *pdev)
183{
184 struct omap_dss_board_info *pdata = pdev->dev.platform_data;
185 int r;
186
187 core.pdev = pdev;
188
189 dss_features_init(omapdss_get_version());
190
191 r = dss_initialize_debugfs();
192 if (r)
193 goto err_debugfs;
194
195 if (def_disp_name)
196 core.default_display_name = def_disp_name;
197 else if (pdata->default_display_name)
198 core.default_display_name = pdata->default_display_name;
199 else if (pdata->default_device)
200 core.default_display_name = pdata->default_device->name;
201
202 return 0;
203
204err_debugfs:
205
206 return r;
207}
208
209static int omap_dss_remove(struct platform_device *pdev)
210{
211 dss_uninitialize_debugfs();
212
213 return 0;
214}
215
216static void omap_dss_shutdown(struct platform_device *pdev)
217{
218 DSSDBG("shutdown\n");
219 dss_disable_all_devices();
220}
221
222static struct platform_driver omap_dss_driver = {
223 .remove = omap_dss_remove,
224 .shutdown = omap_dss_shutdown,
225 .driver = {
226 .name = "omapdss",
227 },
228};
229
230/* INIT */
231static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
232 dss_init_platform_driver,
233 dispc_init_platform_driver,
234#ifdef CONFIG_OMAP2_DSS_DSI
235 dsi_init_platform_driver,
236#endif
237#ifdef CONFIG_OMAP2_DSS_DPI
238 dpi_init_platform_driver,
239#endif
240#ifdef CONFIG_OMAP2_DSS_SDI
241 sdi_init_platform_driver,
242#endif
243#ifdef CONFIG_OMAP2_DSS_RFBI
244 rfbi_init_platform_driver,
245#endif
246#ifdef CONFIG_OMAP2_DSS_VENC
247 venc_init_platform_driver,
248#endif
249#ifdef CONFIG_OMAP4_DSS_HDMI
250 hdmi4_init_platform_driver,
251#endif
252#ifdef CONFIG_OMAP5_DSS_HDMI
253 hdmi5_init_platform_driver,
254#endif
255};
256
257static void (*dss_output_drv_unreg_funcs[])(void) = {
258#ifdef CONFIG_OMAP5_DSS_HDMI
259 hdmi5_uninit_platform_driver,
260#endif
261#ifdef CONFIG_OMAP4_DSS_HDMI
262 hdmi4_uninit_platform_driver,
263#endif
264#ifdef CONFIG_OMAP2_DSS_VENC
265 venc_uninit_platform_driver,
266#endif
267#ifdef CONFIG_OMAP2_DSS_RFBI
268 rfbi_uninit_platform_driver,
269#endif
270#ifdef CONFIG_OMAP2_DSS_SDI
271 sdi_uninit_platform_driver,
272#endif
273#ifdef CONFIG_OMAP2_DSS_DPI
274 dpi_uninit_platform_driver,
275#endif
276#ifdef CONFIG_OMAP2_DSS_DSI
277 dsi_uninit_platform_driver,
278#endif
279 dispc_uninit_platform_driver,
280 dss_uninit_platform_driver,
281};
282
283static int __init omap_dss_init(void)
284{
285 int r;
286 int i;
287
288 r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
289 if (r)
290 return r;
291
292 for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
293 r = dss_output_drv_reg_funcs[i]();
294 if (r)
295 goto err_reg;
296 }
297
298 return 0;
299
300err_reg:
301 for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
302 i < ARRAY_SIZE(dss_output_drv_reg_funcs);
303 ++i)
304 dss_output_drv_unreg_funcs[i]();
305
306 platform_driver_unregister(&omap_dss_driver);
307
308 return r;
309}
310
311static void __exit omap_dss_exit(void)
312{
313 int i;
314
315 for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
316 dss_output_drv_unreg_funcs[i]();
317
318 platform_driver_unregister(&omap_dss_driver);
319}
320
321module_init(omap_dss_init);
322module_exit(omap_dss_exit);
323
324MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
325MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
326MODULE_LICENSE("GPL v2");
327