drivers/video/fbdev/omap2/omapfb/dss/core.c

   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/omapfb_dss.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
  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
  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
  66 struct platform_device *dss_get_core_pdev(void)
  67 {
  68         return core.pdev;
  69 }
  70
  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
  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
  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_FB_OMAP2_DSS_DEBUGFS)
 102 static int dss_show(struct seq_file *s, void *unused)
 103 {
 104         void (*func)(struct seq_file *) = s->private;
 105         func(s);
 106         return 0;
 107 }
 108
 109 DEFINE_SHOW_ATTRIBUTE(dss);
 110
 111 static struct dentry *dss_debugfs_dir;
 112
 113 static void dss_initialize_debugfs(void)
 114 {
 115         dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
 116
 117         debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
 118                         &dss_debug_dump_clocks, &dss_fops);
 119 }
 120
 121 static void dss_uninitialize_debugfs(void)
 122 {
 123         debugfs_remove_recursive(dss_debugfs_dir);
 124 }
 125
 126 void dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
 127 {
 128         debugfs_create_file(name, S_IRUGO, dss_debugfs_dir, write, &dss_fops);
 129 }
 130 #else /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
 131 static inline void dss_initialize_debugfs(void)
 132 {
 133 }
 134 static inline void dss_uninitialize_debugfs(void)
 135 {
 136 }
 137 void dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
 138 {
 139         return 0;
 140 }
 141 #endif /* CONFIG_FB_OMAP2_DSS_DEBUGFS */
 142
 143 /* PLATFORM DEVICE */
 144 static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
 145 {
 146         DSSDBG("pm notif %lu\n", v);
 147
 148         switch (v) {
 149         case PM_SUSPEND_PREPARE:
 150         case PM_HIBERNATION_PREPARE:
 151         case PM_RESTORE_PREPARE:
 152                 DSSDBG("suspending displays\n");
 153                 return dss_suspend_all_devices();
 154
 155         case PM_POST_SUSPEND:
 156         case PM_POST_HIBERNATION:
 157         case PM_POST_RESTORE:
 158                 DSSDBG("resuming displays\n");
 159                 return dss_resume_all_devices();
 160
 161         default:
 162                 return 0;
 163         }
 164 }
 165
 166 static struct notifier_block omap_dss_pm_notif_block = {
 167         .notifier_call = omap_dss_pm_notif,
 168 };
 169
 170 static int __init omap_dss_probe(struct platform_device *pdev)
 171 {
 172         int r;
 173
 174         core.pdev = pdev;
 175
 176         dss_features_init(omapdss_get_version());
 177
 178         dss_initialize_debugfs();
 179
 180         if (def_disp_name)
 181                 core.default_display_name = def_disp_name;
 182
 183         register_pm_notifier(&omap_dss_pm_notif_block);
 184
 185         return 0;
 186 }
 187
 188 static int omap_dss_remove(struct platform_device *pdev)
 189 {
 190         unregister_pm_notifier(&omap_dss_pm_notif_block);
 191
 192         dss_uninitialize_debugfs();
 193
 194         return 0;
 195 }
 196
 197 static void omap_dss_shutdown(struct platform_device *pdev)
 198 {
 199         DSSDBG("shutdown\n");
 200         dss_disable_all_devices();
 201 }
 202
 203 static struct platform_driver omap_dss_driver = {
 204         .remove         = omap_dss_remove,
 205         .shutdown       = omap_dss_shutdown,
 206         .driver         = {
 207                 .name   = "omapdss",
 208         },
 209 };
 210
 211 /* INIT */
 212 static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
 213         dss_init_platform_driver,
 214         dispc_init_platform_driver,
 215 #ifdef CONFIG_FB_OMAP2_DSS_DSI
 216         dsi_init_platform_driver,
 217 #endif
 218 #ifdef CONFIG_FB_OMAP2_DSS_DPI
 219         dpi_init_platform_driver,
 220 #endif
 221 #ifdef CONFIG_FB_OMAP2_DSS_SDI
 222         sdi_init_platform_driver,
 223 #endif
 224 #ifdef CONFIG_FB_OMAP2_DSS_RFBI
 225         rfbi_init_platform_driver,
 226 #endif
 227 #ifdef CONFIG_FB_OMAP2_DSS_VENC
 228         venc_init_platform_driver,
 229 #endif
 230 #ifdef CONFIG_FB_OMAP4_DSS_HDMI
 231         hdmi4_init_platform_driver,
 232 #endif
 233 #ifdef CONFIG_FB_OMAP5_DSS_HDMI
 234         hdmi5_init_platform_driver,
 235 #endif
 236 };
 237
 238 static void (*dss_output_drv_unreg_funcs[])(void) = {
 239 #ifdef CONFIG_FB_OMAP5_DSS_HDMI
 240         hdmi5_uninit_platform_driver,
 241 #endif
 242 #ifdef CONFIG_FB_OMAP4_DSS_HDMI
 243         hdmi4_uninit_platform_driver,
 244 #endif
 245 #ifdef CONFIG_FB_OMAP2_DSS_VENC
 246         venc_uninit_platform_driver,
 247 #endif
 248 #ifdef CONFIG_FB_OMAP2_DSS_RFBI
 249         rfbi_uninit_platform_driver,
 250 #endif
 251 #ifdef CONFIG_FB_OMAP2_DSS_SDI
 252         sdi_uninit_platform_driver,
 253 #endif
 254 #ifdef CONFIG_FB_OMAP2_DSS_DPI
 255         dpi_uninit_platform_driver,
 256 #endif
 257 #ifdef CONFIG_FB_OMAP2_DSS_DSI
 258         dsi_uninit_platform_driver,
 259 #endif
 260         dispc_uninit_platform_driver,
 261         dss_uninit_platform_driver,
 262 };
 263
 264 static int __init omap_dss_init(void)
 265 {
 266         int r;
 267         int i;
 268
 269         r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
 270         if (r)
 271                 return r;
 272
 273         for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
 274                 r = dss_output_drv_reg_funcs[i]();
 275                 if (r)
 276                         goto err_reg;
 277         }
 278
 279         return 0;
 280
 281 err_reg:
 282         for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
 283                         i < ARRAY_SIZE(dss_output_drv_reg_funcs);
 284                         ++i)
 285                 dss_output_drv_unreg_funcs[i]();
 286
 287         platform_driver_unregister(&omap_dss_driver);
 288
 289         return r;
 290 }
 291
 292 static void __exit omap_dss_exit(void)
 293 {
 294         int i;
 295
 296         for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
 297                 dss_output_drv_unreg_funcs[i]();
 298
 299         platform_driver_unregister(&omap_dss_driver);
 300 }
 301
 302 module_init(omap_dss_init);
 303 module_exit(omap_dss_exit);
 304
 305 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
 306 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
 307 MODULE_LICENSE("GPL v2");
 308