drivers/video/fbdev/omap2/omapfb/omapfb.h

   1 /*
   2  * linux/drivers/video/omap2/omapfb.h
   3  *
   4  * Copyright (C) 2008 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 #ifndef __DRIVERS_VIDEO_OMAP2_OMAPFB_H__
  24 #define __DRIVERS_VIDEO_OMAP2_OMAPFB_H__
  25
  26 #ifdef CONFIG_FB_OMAP2_DEBUG_SUPPORT
  27 #define DEBUG
  28 #endif
  29
  30 #include <linux/rwsem.h>
  31 #include <linux/dma-attrs.h>
  32 #include <linux/dma-mapping.h>
  33
  34 #include <video/omapdss.h>
  35
  36 #ifdef DEBUG
  37 extern bool omapfb_debug;
  38 #define DBG(format, ...) \
  39         do { \
  40                 if (omapfb_debug) \
  41                         printk(KERN_DEBUG "OMAPFB: " format, ## __VA_ARGS__); \
  42         } while (0)
  43 #else
  44 #define DBG(format, ...)
  45 #endif
  46
  47 #define FB2OFB(fb_info) ((struct omapfb_info *)(fb_info->par))
  48
  49 /* max number of overlays to which a framebuffer data can be direct */
  50 #define OMAPFB_MAX_OVL_PER_FB 3
  51
  52 struct omapfb2_mem_region {
  53         int             id;
  54         struct dma_attrs attrs;
  55         void            *token;
  56         dma_addr_t      dma_handle;
  57         u32             paddr;
  58         void __iomem    *vaddr;
  59         struct vrfb     vrfb;
  60         unsigned long   size;
  61         u8              type;           /* OMAPFB_PLANE_MEM_* */
  62         bool            alloc;          /* allocated by the driver */
  63         bool            map;            /* kernel mapped by the driver */
  64         atomic_t        map_count;
  65         struct rw_semaphore lock;
  66         atomic_t        lock_count;
  67 };
  68
  69 /* appended to fb_info */
  70 struct omapfb_info {
  71         int id;
  72         struct omapfb2_mem_region *region;
  73         int num_overlays;
  74         struct omap_overlay *overlays[OMAPFB_MAX_OVL_PER_FB];
  75         struct omapfb2_device *fbdev;
  76         enum omap_dss_rotation_type rotation_type;
  77         u8 rotation[OMAPFB_MAX_OVL_PER_FB];
  78         bool mirror;
  79 };
  80
  81 struct omapfb_display_data {
  82         struct omapfb2_device *fbdev;
  83         struct omap_dss_device *dssdev;
  84         u8 bpp_override;
  85         enum omapfb_update_mode update_mode;
  86         bool auto_update_work_enabled;
  87         struct delayed_work auto_update_work;
  88 };
  89
  90 struct omapfb2_device {
  91         struct device *dev;
  92         struct mutex  mtx;
  93
  94         u32 pseudo_palette[17];
  95
  96         int state;
  97
  98         unsigned num_fbs;
  99         struct fb_info *fbs[10];
 100         struct omapfb2_mem_region regions[10];
 101
 102         unsigned num_displays;
 103         struct omapfb_display_data displays[10];
 104         unsigned num_overlays;
 105         struct omap_overlay *overlays[10];
 106         unsigned num_managers;
 107         struct omap_overlay_manager *managers[10];
 108
 109         struct workqueue_struct *auto_update_wq;
 110 };
 111
 112 struct omapfb_colormode {
 113         enum omap_color_mode dssmode;
 114         u32 bits_per_pixel;
 115         u32 nonstd;
 116         struct fb_bitfield red;
 117         struct fb_bitfield green;
 118         struct fb_bitfield blue;
 119         struct fb_bitfield transp;
 120 };
 121
 122 void set_fb_fix(struct fb_info *fbi);
 123 int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var);
 124 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type);
 125 int omapfb_apply_changes(struct fb_info *fbi, int init);
 126
 127 int omapfb_create_sysfs(struct omapfb2_device *fbdev);
 128 void omapfb_remove_sysfs(struct omapfb2_device *fbdev);
 129
 130 int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg);
 131
 132 int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
 133                         struct fb_var_screeninfo *var);
 134
 135 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
 136                 u16 posx, u16 posy, u16 outw, u16 outh);
 137
 138 void omapfb_start_auto_update(struct omapfb2_device *fbdev,
 139                 struct omap_dss_device *display);
 140 void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
 141                 struct omap_dss_device *display);
 142 int omapfb_get_update_mode(struct fb_info *fbi, enum omapfb_update_mode *mode);
 143 int omapfb_set_update_mode(struct fb_info *fbi, enum omapfb_update_mode mode);
 144
 145 /* find the display connected to this fb, if any */
 146 static inline struct omap_dss_device *fb2display(struct fb_info *fbi)
 147 {
 148         struct omapfb_info *ofbi = FB2OFB(fbi);
 149         struct omap_overlay *ovl;
 150
 151         /* XXX: returns the display connected to first attached overlay */
 152
 153         if (ofbi->num_overlays == 0)
 154                 return NULL;
 155
 156         ovl = ofbi->overlays[0];
 157
 158         return ovl->get_device(ovl);
 159 }
 160
 161 static inline struct omapfb_display_data *get_display_data(
 162                 struct omapfb2_device *fbdev, struct omap_dss_device *dssdev)
 163 {
 164         int i;
 165
 166         for (i = 0; i < fbdev->num_displays; ++i)
 167                 if (fbdev->displays[i].dssdev == dssdev)
 168                         return &fbdev->displays[i];
 169
 170         /* This should never happen */
 171         BUG();
 172         return NULL;
 173 }
 174
 175 static inline void omapfb_lock(struct omapfb2_device *fbdev)
 176 {
 177         mutex_lock(&fbdev->mtx);
 178 }
 179
 180 static inline void omapfb_unlock(struct omapfb2_device *fbdev)
 181 {
 182         mutex_unlock(&fbdev->mtx);
 183 }
 184
 185 static inline int omapfb_overlay_enable(struct omap_overlay *ovl,
 186                 int enable)
 187 {
 188         if (enable)
 189                 return ovl->enable(ovl);
 190         else
 191                 return ovl->disable(ovl);
 192 }
 193
 194 static inline struct omapfb2_mem_region *
 195 omapfb_get_mem_region(struct omapfb2_mem_region *rg)
 196 {
 197         down_read_nested(&rg->lock, rg->id);
 198         atomic_inc(&rg->lock_count);
 199         return rg;
 200 }
 201
 202 static inline void omapfb_put_mem_region(struct omapfb2_mem_region *rg)
 203 {
 204         atomic_dec(&rg->lock_count);
 205         up_read(&rg->lock);
 206 }
 207
 208 #endif