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 "omapdss.h"
39 #include "dss.h"
40 #include "dss_features.h"
41
42 static struct {
43 struct platform_device *pdev;
44
45 const char *default_display_name;
46 } core;
47
48 static char *def_disp_name;
49 module_param_named(def_disp, def_disp_name, charp, 0);
50 MODULE_PARM_DESC(def_disp, "default display name");
51
omapdss_get_default_display_name(void)52 const char *omapdss_get_default_display_name(void)
53 {
54 return core.default_display_name;
55 }
56 EXPORT_SYMBOL(omapdss_get_default_display_name);
57
omapdss_get_version(void)58 enum omapdss_version omapdss_get_version(void)
59 {
60 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
61 return pdata->version;
62 }
63 EXPORT_SYMBOL(omapdss_get_version);
64
dss_get_core_pdev(void)65 struct platform_device *dss_get_core_pdev(void)
66 {
67 return core.pdev;
68 }
69
dss_dsi_enable_pads(int dsi_id,unsigned lane_mask)70 int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
71 {
72 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
73
74 if (!board_data->dsi_enable_pads)
75 return -ENOENT;
76
77 return board_data->dsi_enable_pads(dsi_id, lane_mask);
78 }
79
dss_dsi_disable_pads(int dsi_id,unsigned lane_mask)80 void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
81 {
82 struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
83
84 if (!board_data->dsi_disable_pads)
85 return;
86
87 return board_data->dsi_disable_pads(dsi_id, lane_mask);
88 }
89
dss_set_min_bus_tput(struct device * dev,unsigned long tput)90 int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
91 {
92 struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
93
94 if (pdata->set_min_bus_tput)
95 return pdata->set_min_bus_tput(dev, tput);
96 else
97 return 0;
98 }
99
100 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
dss_debug_show(struct seq_file * s,void * unused)101 static int dss_debug_show(struct seq_file *s, void *unused)
102 {
103 void (*func)(struct seq_file *) = s->private;
104 func(s);
105 return 0;
106 }
107
dss_debug_open(struct inode * inode,struct file * file)108 static int dss_debug_open(struct inode *inode, struct file *file)
109 {
110 return single_open(file, dss_debug_show, inode->i_private);
111 }
112
113 static const struct file_operations dss_debug_fops = {
114 .open = dss_debug_open,
115 .read = seq_read,
116 .llseek = seq_lseek,
117 .release = single_release,
118 };
119
120 static struct dentry *dss_debugfs_dir;
121
dss_initialize_debugfs(void)122 static int dss_initialize_debugfs(void)
123 {
124 dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
125 if (IS_ERR(dss_debugfs_dir)) {
126 int err = PTR_ERR(dss_debugfs_dir);
127 dss_debugfs_dir = NULL;
128 return err;
129 }
130
131 debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
132 &dss_debug_dump_clocks, &dss_debug_fops);
133
134 return 0;
135 }
136
dss_uninitialize_debugfs(void)137 static void dss_uninitialize_debugfs(void)
138 {
139 if (dss_debugfs_dir)
140 debugfs_remove_recursive(dss_debugfs_dir);
141 }
142
dss_debugfs_create_file(const char * name,void (* write)(struct seq_file *))143 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
144 {
145 struct dentry *d;
146
147 d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
148 write, &dss_debug_fops);
149
150 return PTR_ERR_OR_ZERO(d);
151 }
152 #else /* CONFIG_OMAP2_DSS_DEBUGFS */
dss_initialize_debugfs(void)153 static inline int dss_initialize_debugfs(void)
154 {
155 return 0;
156 }
dss_uninitialize_debugfs(void)157 static inline void dss_uninitialize_debugfs(void)
158 {
159 }
dss_debugfs_create_file(const char * name,void (* write)(struct seq_file *))160 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
161 {
162 return 0;
163 }
164 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */
165
166 /* PLATFORM DEVICE */
167
dss_disable_all_devices(void)168 static void dss_disable_all_devices(void)
169 {
170 struct omap_dss_device *dssdev = NULL;
171
172 for_each_dss_dev(dssdev) {
173 if (!dssdev->driver)
174 continue;
175
176 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
177 dssdev->driver->disable(dssdev);
178 }
179 }
180
omap_dss_probe(struct platform_device * pdev)181 static int __init omap_dss_probe(struct platform_device *pdev)
182 {
183 struct omap_dss_board_info *pdata = pdev->dev.platform_data;
184 int r;
185
186 core.pdev = pdev;
187
188 dss_features_init(omapdss_get_version());
189
190 r = dss_initialize_debugfs();
191 if (r)
192 goto err_debugfs;
193
194 if (def_disp_name)
195 core.default_display_name = def_disp_name;
196 else if (pdata->default_display_name)
197 core.default_display_name = pdata->default_display_name;
198
199 return 0;
200
201 err_debugfs:
202
203 return r;
204 }
205
omap_dss_remove(struct platform_device * pdev)206 static int omap_dss_remove(struct platform_device *pdev)
207 {
208 dss_uninitialize_debugfs();
209
210 return 0;
211 }
212
omap_dss_shutdown(struct platform_device * pdev)213 static void omap_dss_shutdown(struct platform_device *pdev)
214 {
215 DSSDBG("shutdown\n");
216 dss_disable_all_devices();
217 }
218
219 static struct platform_driver omap_dss_driver = {
220 .remove = omap_dss_remove,
221 .shutdown = omap_dss_shutdown,
222 .driver = {
223 .name = "omapdss",
224 },
225 };
226
227 /* INIT */
228 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
229 dss_init_platform_driver,
230 dispc_init_platform_driver,
231 #ifdef CONFIG_OMAP2_DSS_DSI
232 dsi_init_platform_driver,
233 #endif
234 #ifdef CONFIG_OMAP2_DSS_DPI
235 dpi_init_platform_driver,
236 #endif
237 #ifdef CONFIG_OMAP2_DSS_SDI
238 sdi_init_platform_driver,
239 #endif
240 #ifdef CONFIG_OMAP2_DSS_RFBI
241 rfbi_init_platform_driver,
242 #endif
243 #ifdef CONFIG_OMAP2_DSS_VENC
244 venc_init_platform_driver,
245 #endif
246 #ifdef CONFIG_OMAP4_DSS_HDMI
247 hdmi4_init_platform_driver,
248 #endif
249 #ifdef CONFIG_OMAP5_DSS_HDMI
250 hdmi5_init_platform_driver,
251 #endif
252 };
253
254 static void (*dss_output_drv_unreg_funcs[])(void) = {
255 #ifdef CONFIG_OMAP5_DSS_HDMI
256 hdmi5_uninit_platform_driver,
257 #endif
258 #ifdef CONFIG_OMAP4_DSS_HDMI
259 hdmi4_uninit_platform_driver,
260 #endif
261 #ifdef CONFIG_OMAP2_DSS_VENC
262 venc_uninit_platform_driver,
263 #endif
264 #ifdef CONFIG_OMAP2_DSS_RFBI
265 rfbi_uninit_platform_driver,
266 #endif
267 #ifdef CONFIG_OMAP2_DSS_SDI
268 sdi_uninit_platform_driver,
269 #endif
270 #ifdef CONFIG_OMAP2_DSS_DPI
271 dpi_uninit_platform_driver,
272 #endif
273 #ifdef CONFIG_OMAP2_DSS_DSI
274 dsi_uninit_platform_driver,
275 #endif
276 dispc_uninit_platform_driver,
277 dss_uninit_platform_driver,
278 };
279
omap_dss_init(void)280 static int __init omap_dss_init(void)
281 {
282 int r;
283 int i;
284
285 r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
286 if (r)
287 return r;
288
289 for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
290 r = dss_output_drv_reg_funcs[i]();
291 if (r)
292 goto err_reg;
293 }
294
295 return 0;
296
297 err_reg:
298 for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
299 i < ARRAY_SIZE(dss_output_drv_reg_funcs);
300 ++i)
301 dss_output_drv_unreg_funcs[i]();
302
303 platform_driver_unregister(&omap_dss_driver);
304
305 return r;
306 }
307
omap_dss_exit(void)308 static void __exit omap_dss_exit(void)
309 {
310 int i;
311
312 for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
313 dss_output_drv_unreg_funcs[i]();
314
315 platform_driver_unregister(&omap_dss_driver);
316 }
317
318 module_init(omap_dss_init);
319 module_exit(omap_dss_exit);
320
321 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
322 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
323 MODULE_LICENSE("GPL v2");
324
325