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