drivers/video/rockchip/rkfb_sysfs.c

   1 /*
   2  * linux/drivers/video/rockchip/rkfb-sysfs.c
   3  *
   4  * Copyright (C) 2012 Rockchip Corporation
   5  * Author: yxj<yxj@rock-chips.com>
   6  *
   7  * Some code and ideas taken from
   8  *drivers/video/omap2/omapfb/omapfb-sys.c
   9  *driver by Tomi Valkeinen.
  10  *
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License version 2 as published by
  14  * the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  * more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along with
  22  * this program.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #include <linux/fb.h>
  26 #include <linux/sysfs.h>
  27 #include <linux/device.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/kernel.h>
  31 #include <linux/mm.h>
  32 #include <asm/div64.h>
  33 #include <linux/rk_screen.h>
  34 #include <linux/rk_fb.h>
  35
  36
  37 static ssize_t show_screen_info(struct device *dev,
  38                 struct device_attribute *attr, char *buf)
  39 {
  40         struct fb_info *fbi = dev_get_drvdata(dev);
  41         struct rk_lcdc_device_driver * dev_drv =
  42                 (struct rk_lcdc_device_driver * )fbi->par;
  43         rk_screen * screen = dev_drv->screen;
  44         int fps;
  45         u64 ft = (u64)(screen->upper_margin + screen->lower_margin + screen->y_res +screen->vsync_len)*
  46                 (screen->left_margin + screen->right_margin + screen->x_res + screen->hsync_len)*
  47                 (dev_drv->pixclock);       // one frame time ,(pico seconds)
  48         fps = div64_u64(1000000000000llu,ft);
  49         return snprintf(buf, PAGE_SIZE,"xres:%d\nyres:%d\nfps:%d\n",
  50                 screen->x_res,screen->y_res,fps);
  51 }
  52
  53 static ssize_t show_disp_info(struct device *dev,
  54                 struct device_attribute *attr, char *buf)
  55 {
  56         struct fb_info *fbi = dev_get_drvdata(dev);
  57         struct rk_lcdc_device_driver * dev_drv =
  58                 (struct rk_lcdc_device_driver * )fbi->par;
  59         int layer_id = get_fb_layer_id(&fbi->fix);
  60         if(dev_drv->get_disp_info)
  61                 dev_drv->get_disp_info(dev_drv,layer_id);
  62
  63         return 0;
  64 }
  65
  66 static ssize_t show_phys(struct device *dev,
  67                 struct device_attribute *attr, char *buf)
  68 {
  69         struct fb_info *fbi = dev_get_drvdata(dev);
  70         return snprintf(buf, PAGE_SIZE, "0x%lx-----0x%x\n",
  71                 fbi->fix.smem_start,fbi->fix.smem_len);
  72 }
  73
  74 static ssize_t show_virt(struct device *dev,
  75                 struct device_attribute *attr, char *buf)
  76 {
  77         struct fb_info *fbi = dev_get_drvdata(dev);
  78
  79         return snprintf(buf, PAGE_SIZE, "0x%p-----0x%x\n",
  80                 fbi->screen_base,fbi->fix.smem_len);
  81 }
  82
  83 static ssize_t show_fb_state(struct device *dev,
  84                 struct device_attribute *attr, char *buf)
  85 {
  86         struct fb_info *fbi = dev_get_drvdata(dev);
  87         struct rk_lcdc_device_driver * dev_drv =
  88                 (struct rk_lcdc_device_driver * )fbi->par;
  89         int layer_id = get_fb_layer_id(&fbi->fix);
  90         int state = dev_drv->get_layer_state(dev_drv,layer_id);
  91         return snprintf(buf, PAGE_SIZE, "%s\n",state?"enabled":"disabled");
  92
  93 }
  94 static ssize_t set_fb_state(struct device *dev,struct device_attribute *attr,
  95         const char *buf, size_t count)
  96 {
  97         struct fb_info *fbi = dev_get_drvdata(dev);
  98         struct rk_lcdc_device_driver * dev_drv =
  99                 (struct rk_lcdc_device_driver * )fbi->par;
 100         int layer_id = get_fb_layer_id(&fbi->fix);
 101         int state;
 102         int ret;
 103         ret = kstrtoint(buf, 0, &state);
 104         if(ret)
 105         {
 106                 return ret;
 107         }
 108         dev_drv->open(dev_drv,layer_id,state);
 109         return count;
 110 }
 111
 112 static ssize_t show_overlay(struct device *dev,
 113                 struct device_attribute *attr, char *buf)
 114 {
 115         struct fb_info *fbi = dev_get_drvdata(dev);
 116         struct rk_lcdc_device_driver * dev_drv =
 117                 (struct rk_lcdc_device_driver * )fbi->par;
 118         int ovl;
 119         ovl =  dev_drv->ovl_mgr(dev_drv,0,0);
 120         if(ovl < 0)
 121         {
 122                 return ovl;
 123         }
 124
 125         return snprintf(buf, PAGE_SIZE, "%s\n",
 126                 ovl?"win0 on the top of win1":"win1 on the top of win0");
 127
 128 }
 129 static ssize_t set_overlay(struct device *dev,struct device_attribute *attr,
 130         const char *buf, size_t count)
 131 {
 132         struct fb_info *fbi = dev_get_drvdata(dev);
 133         struct rk_lcdc_device_driver * dev_drv =
 134                 (struct rk_lcdc_device_driver * )fbi->par;
 135         int ovl;
 136         int ret;
 137         ret = kstrtoint(buf, 0, &ovl);
 138         if(ret)
 139         {
 140                 return ret;
 141         }
 142         ret = dev_drv->ovl_mgr(dev_drv,ovl,1);
 143         if(ret < 0)
 144         {
 145                 return ret;
 146         }
 147
 148         return count;
 149 }
 150
 151
 152 static ssize_t show_fps(struct device *dev,
 153                 struct device_attribute *attr, char *buf)
 154 {
 155         struct fb_info *fbi = dev_get_drvdata(dev);
 156         struct rk_lcdc_device_driver * dev_drv =
 157                 (struct rk_lcdc_device_driver * )fbi->par;
 158         int fps;
 159         fps =  dev_drv->fps_mgr(dev_drv,0,0);
 160         if(fps < 0)
 161         {
 162                 return fps;
 163         }
 164
 165         return snprintf(buf, PAGE_SIZE, "fps:%d\n",fps);
 166
 167 }
 168
 169 static ssize_t set_fps(struct device *dev,struct device_attribute *attr,
 170         const char *buf, size_t count)
 171 {
 172         struct fb_info *fbi = dev_get_drvdata(dev);
 173         struct rk_lcdc_device_driver * dev_drv =
 174                 (struct rk_lcdc_device_driver * )fbi->par;
 175         int fps;
 176         int ret;
 177         ret = kstrtoint(buf, 0, &fps);
 178         if(ret)
 179         {
 180                 return ret;
 181         }
 182         ret = dev_drv->fps_mgr(dev_drv,fps,1);
 183         if(ret < 0)
 184         {
 185                 return ret;
 186         }
 187
 188         return count;
 189 }
 190
 191 static struct device_attribute rkfb_attrs[] = {
 192         __ATTR(phys_addr, S_IRUGO, show_phys, NULL),
 193         __ATTR(virt_addr, S_IRUGO, show_virt, NULL),
 194         __ATTR(disp_info, S_IRUGO, show_disp_info, NULL),
 195         __ATTR(screen_info, S_IRUGO, show_screen_info, NULL),
 196         __ATTR(enable, S_IRUGO | S_IWUSR, show_fb_state, set_fb_state),
 197         __ATTR(overlay, S_IRUGO | S_IWUSR, show_overlay, set_overlay),
 198         __ATTR(fps, S_IRUGO | S_IWUSR, show_fps, set_fps),
 199 };
 200
 201 int rkfb_create_sysfs(struct fb_info *fbi)
 202 {
 203         int r;
 204         int t;
 205         for (t = 0; t < ARRAY_SIZE(rkfb_attrs); t++)
 206         {
 207                 r = device_create_file(fbi->dev,&rkfb_attrs[t]);
 208                 if (r)
 209                 {
 210                         dev_err(fbi->dev, "failed to create sysfs "
 211                                         "file\n");
 212                         return r;
 213                 }
 214         }
 215
 216
 217         return 0;
 218 }
 219
 220 void rkfb_remove_sysfs(struct rk_fb_inf *inf)
 221 {
 222         int i, t;
 223
 224         for (i = 0; i < inf->num_fb; i++) {
 225                 for (t = 0; t < ARRAY_SIZE(rkfb_attrs); t++)
 226                         device_remove_file(inf->fb[i]->dev,
 227                                         &rkfb_attrs[t]);
 228         }
 229 }
 230