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
43 static struct {
44 struct platform_device *pdev;
45
46 const char *default_display_name;
47 } core;
48
49 static char *def_disp_name;
50 module_param_named(def_disp, def_disp_name, charp, 0);
51 MODULE_PARM_DESC(def_disp, "default display name");
52
omapdss_get_default_display_name(void)53 const char *omapdss_get_default_display_name(void)
54 {
55 return core.default_display_name;
56 }
57 EXPORT_SYMBOL(omapdss_get_default_display_name);
58
omapdss_get_version(void)59 enum omapdss_version omapdss_get_version(void)
60 {
61 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
62 return pdata->version;
63 }
64 EXPORT_SYMBOL(omapdss_get_version);
65
dss_get_core_pdev(void)66 struct platform_device *dss_get_core_pdev(void)
67 {
68 return core.pdev;
69 }
70
dss_dsi_enable_pads(int dsi_id,unsigned lane_mask)71 int 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
dss_dsi_disable_pads(int dsi_id,unsigned lane_mask)81 void 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
dss_set_min_bus_tput(struct device * dev,unsigned long tput)91 int 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)
dss_debug_show(struct seq_file * s,void * unused)102 static 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
dss_debug_open(struct inode * inode,struct file * file)109 static int dss_debug_open(struct inode *inode, struct file *file)
110 {
111 return single_open(file, dss_debug_show, inode->i_private);
112 }
113
114 static 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
121 static struct dentry *dss_debugfs_dir;
122
dss_initialize_debugfs(void)123 static 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
dss_uninitialize_debugfs(void)138 static void dss_uninitialize_debugfs(void)
139 {
140 if (dss_debugfs_dir)
141 debugfs_remove_recursive(dss_debugfs_dir);
142 }
143
dss_debugfs_create_file(const char * name,void (* write)(struct seq_file *))144 int 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 */
dss_initialize_debugfs(void)154 static inline int dss_initialize_debugfs(void)
155 {
156 return 0;
157 }
dss_uninitialize_debugfs(void)158 static inline void dss_uninitialize_debugfs(void)
159 {
160 }
dss_debugfs_create_file(const char * name,void (* write)(struct seq_file *))161 int 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 */
omap_dss_pm_notif(struct notifier_block * b,unsigned long v,void * d)168 static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
169 {
170 DSSDBG("pm notif %lu\n", v);
171
172 switch (v) {
173 case PM_SUSPEND_PREPARE:
174 case PM_HIBERNATION_PREPARE:
175 case PM_RESTORE_PREPARE:
176 DSSDBG("suspending displays\n");
177 return dss_suspend_all_devices();
178
179 case PM_POST_SUSPEND:
180 case PM_POST_HIBERNATION:
181 case PM_POST_RESTORE:
182 DSSDBG("resuming displays\n");
183 return dss_resume_all_devices();
184
185 default:
186 return 0;
187 }
188 }
189
190 static struct notifier_block omap_dss_pm_notif_block = {
191 .notifier_call = omap_dss_pm_notif,
192 };
193
omap_dss_probe(struct platform_device * pdev)194 static int __init omap_dss_probe(struct platform_device *pdev)
195 {
196 struct omap_dss_board_info *pdata = pdev->dev.platform_data;
197 int r;
198
199 core.pdev = pdev;
200
201 dss_features_init(omapdss_get_version());
202
203 r = dss_initialize_debugfs();
204 if (r)
205 goto err_debugfs;
206
207 if (def_disp_name)
208 core.default_display_name = def_disp_name;
209 else if (pdata->default_display_name)
210 core.default_display_name = pdata->default_display_name;
211 else if (pdata->default_device)
212 core.default_display_name = pdata->default_device->name;
213
214 register_pm_notifier(&omap_dss_pm_notif_block);
215
216 return 0;
217
218 err_debugfs:
219
220 return r;
221 }
222
omap_dss_remove(struct platform_device * pdev)223 static int omap_dss_remove(struct platform_device *pdev)
224 {
225 unregister_pm_notifier(&omap_dss_pm_notif_block);
226
227 dss_uninitialize_debugfs();
228
229 return 0;
230 }
231
omap_dss_shutdown(struct platform_device * pdev)232 static void omap_dss_shutdown(struct platform_device *pdev)
233 {
234 DSSDBG("shutdown\n");
235 dss_disable_all_devices();
236 }
237
238 static struct platform_driver omap_dss_driver = {
239 .remove = omap_dss_remove,
240 .shutdown = omap_dss_shutdown,
241 .driver = {
242 .name = "omapdss",
243 },
244 };
245
246 /* INIT */
247 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
248 dss_init_platform_driver,
249 dispc_init_platform_driver,
250 #ifdef CONFIG_OMAP2_DSS_DSI
251 dsi_init_platform_driver,
252 #endif
253 #ifdef CONFIG_OMAP2_DSS_DPI
254 dpi_init_platform_driver,
255 #endif
256 #ifdef CONFIG_OMAP2_DSS_SDI
257 sdi_init_platform_driver,
258 #endif
259 #ifdef CONFIG_OMAP2_DSS_RFBI
260 rfbi_init_platform_driver,
261 #endif
262 #ifdef CONFIG_OMAP2_DSS_VENC
263 venc_init_platform_driver,
264 #endif
265 #ifdef CONFIG_OMAP4_DSS_HDMI
266 hdmi4_init_platform_driver,
267 #endif
268 #ifdef CONFIG_OMAP5_DSS_HDMI
269 hdmi5_init_platform_driver,
270 #endif
271 };
272
273 static void (*dss_output_drv_unreg_funcs[])(void) = {
274 #ifdef CONFIG_OMAP5_DSS_HDMI
275 hdmi5_uninit_platform_driver,
276 #endif
277 #ifdef CONFIG_OMAP4_DSS_HDMI
278 hdmi4_uninit_platform_driver,
279 #endif
280 #ifdef CONFIG_OMAP2_DSS_VENC
281 venc_uninit_platform_driver,
282 #endif
283 #ifdef CONFIG_OMAP2_DSS_RFBI
284 rfbi_uninit_platform_driver,
285 #endif
286 #ifdef CONFIG_OMAP2_DSS_SDI
287 sdi_uninit_platform_driver,
288 #endif
289 #ifdef CONFIG_OMAP2_DSS_DPI
290 dpi_uninit_platform_driver,
291 #endif
292 #ifdef CONFIG_OMAP2_DSS_DSI
293 dsi_uninit_platform_driver,
294 #endif
295 dispc_uninit_platform_driver,
296 dss_uninit_platform_driver,
297 };
298
omap_dss_init(void)299 static int __init omap_dss_init(void)
300 {
301 int r;
302 int i;
303
304 r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
305 if (r)
306 return r;
307
308 for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
309 r = dss_output_drv_reg_funcs[i]();
310 if (r)
311 goto err_reg;
312 }
313
314 return 0;
315
316 err_reg:
317 for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
318 i < ARRAY_SIZE(dss_output_drv_reg_funcs);
319 ++i)
320 dss_output_drv_unreg_funcs[i]();
321
322 platform_driver_unregister(&omap_dss_driver);
323
324 return r;
325 }
326
omap_dss_exit(void)327 static void __exit omap_dss_exit(void)
328 {
329 int i;
330
331 for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
332 dss_output_drv_unreg_funcs[i]();
333
334 platform_driver_unregister(&omap_dss_driver);
335 }
336
337 module_init(omap_dss_init);
338 module_exit(omap_dss_exit);
339
340 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
341 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
342 MODULE_LICENSE("GPL v2");
343
344