drivers/gpu/drm/omapdrm/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 "omapdss.h"
  39 #include "dss.h"
  40 #include "dss_features.h"
  41
  42 static struct {
  43         struct platform_device *pdev;
  44 } core;
  45
  46 enum omapdss_version omapdss_get_version(void)
  47 {
  48         struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
  49         return pdata->version;
  50 }
  51 EXPORT_SYMBOL(omapdss_get_version);
  52
  53 int 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
  63 void 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
  73 int 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)
  84 static 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
  91 static int dss_debug_open(struct inode *inode, struct file *file)
  92 {
  93         return single_open(file, dss_debug_show, inode->i_private);
  94 }
  95
  96 static 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
 103 static struct dentry *dss_debugfs_dir;
 104
 105 static 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
 120 static void dss_uninitialize_debugfs(void)
 121 {
 122         if (dss_debugfs_dir)
 123                 debugfs_remove_recursive(dss_debugfs_dir);
 124 }
 125
 126 int 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 */
 136 static inline int dss_initialize_debugfs(void)
 137 {
 138         return 0;
 139 }
 140 static inline void dss_uninitialize_debugfs(void)
 141 {
 142 }
 143 int 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
 151 static 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
 164 static 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
 178 err_debugfs:
 179
 180         return r;
 181 }
 182
 183 static int omap_dss_remove(struct platform_device *pdev)
 184 {
 185         dss_uninitialize_debugfs();
 186
 187         return 0;
 188 }
 189
 190 static void omap_dss_shutdown(struct platform_device *pdev)
 191 {
 192         DSSDBG("shutdown\n");
 193         dss_disable_all_devices();
 194 }
 195
 196 static 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 */
 205 static 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
 222 static 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
 239 static 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
 256 err_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
 267 static 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
 277 module_init(omap_dss_init);
 278 module_exit(omap_dss_exit);
 279
 280 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
 281 MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
 282 MODULE_LICENSE("GPL v2");
 283