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         int state;
  99         int ret;
 100         ret = kstrtoint(buf, 0, &state);
 101         if(ret)
 102         {
 103                 return ret;
 104         }
 105         if(state)
 106         {
 107                 fbi->fbops->fb_open(fbi,1);
 108         }
 109         else
 110         {
 111                 fbi->fbops->fb_release(fbi,1);
 112         }
 113         return count;
 114 }
 115
 116 static struct device_attribute rkfb_attrs[] = {
 117         __ATTR(phys_addr, S_IRUGO, show_phys, NULL),
 118         __ATTR(virt_addr, S_IRUGO, show_virt, NULL),
 119         __ATTR(disp_info, S_IRUGO, show_disp_info, NULL),
 120         __ATTR(screen_info, S_IRUGO, show_screen_info, NULL),
 121         __ATTR(enable, S_IRUGO | S_IWUSR, show_fb_state, set_fb_state),
 122 };
 123
 124 int rkfb_create_sysfs(struct fb_info *fbi)
 125 {
 126         int r;
 127         int t;
 128         for (t = 0; t < ARRAY_SIZE(rkfb_attrs); t++)
 129         {
 130                 r = device_create_file(fbi->dev,&rkfb_attrs[t]);
 131                 if (r)
 132                 {
 133                         dev_err(fbi->dev, "failed to create sysfs "
 134                                         "file\n");
 135                         return r;
 136                 }
 137         }
 138
 139
 140         return 0;
 141 }
 142
 143 void rkfb_remove_sysfs(struct rk_fb_inf *inf)
 144 {
 145         int i, t;
 146
 147         for (i = 0; i < inf->num_fb; i++) {
 148                 for (t = 0; t < ARRAY_SIZE(rkfb_attrs); t++)
 149                         device_remove_file(inf->fb[i]->dev,
 150                                         &rkfb_attrs[t]);
 151         }
 152 }
 153