#include <linux/kernel.h>
#include <linux/fb.h>
+#include <linux/console.h>
/**
* framebuffer_alloc - creates a new frame buffer info structure
#undef PADDING
#undef BYTES_PER_LONG
}
+EXPORT_SYMBOL(framebuffer_alloc);
/**
* framebuffer_release - marks the structure available for freeing
{
kfree(info);
}
-
EXPORT_SYMBOL(framebuffer_release);
-EXPORT_SYMBOL(framebuffer_alloc);
+
+static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var)
+{
+ int err;
+
+ var->activate |= FB_ACTIVATE_FORCE;
+ acquire_console_sem();
+ fb_info->flags |= FBINFO_MISC_USEREVENT;
+ err = fb_set_var(fb_info, var);
+ fb_info->flags &= ~FBINFO_MISC_USEREVENT;
+ release_console_sem();
+ if (err)
+ return err;
+ return 0;
+}
+
+static int mode_string(char *buf, unsigned int offset,
+ const struct fb_videomode *mode)
+{
+ char m = 'U';
+ if (mode->flag & FB_MODE_IS_DETAILED)
+ m = 'D';
+ if (mode->flag & FB_MODE_IS_VESA)
+ m = 'V';
+ if (mode->flag & FB_MODE_IS_STANDARD)
+ m = 'S';
+ return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d-%d\n", m, mode->xres, mode->yres, mode->refresh);
+}
+
+static ssize_t store_mode(struct class_device *class_device, const char * buf,
+ size_t count)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ char mstr[100];
+ struct fb_var_screeninfo var;
+ struct fb_modelist *modelist;
+ struct fb_videomode *mode;
+ struct list_head *pos;
+ size_t i;
+ int err;
+
+ memset(&var, 0, sizeof(var));
+
+ list_for_each(pos, &fb_info->modelist) {
+ modelist = list_entry(pos, struct fb_modelist, list);
+ mode = &modelist->mode;
+ i = mode_string(mstr, 0, mode);
+ if (strncmp(mstr, buf, max(count, i)) == 0) {
+
+ var = fb_info->var;
+ fb_videomode_to_var(&var, mode);
+ if ((err = activate(fb_info, &var)))
+ return err;
+ fb_info->mode = mode;
+ return count;
+ }
+ }
+ return -EINVAL;
+}
+
+static ssize_t show_mode(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+
+ if (!fb_info->mode)
+ return 0;
+
+ return mode_string(buf, 0, fb_info->mode);
+}
+
+static ssize_t store_modes(struct class_device *class_device, const char * buf,
+ size_t count)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ LIST_HEAD(old_list);
+ int i = count / sizeof(struct fb_videomode);
+
+ if (i * sizeof(struct fb_videomode) != count)
+ return -EINVAL;
+
+ acquire_console_sem();
+ list_splice(&fb_info->modelist, &old_list);
+ fb_videomode_to_modelist((struct fb_videomode *)buf, i,
+ &fb_info->modelist);
+ if (fb_new_modelist(fb_info)) {
+ fb_destroy_modelist(&fb_info->modelist);
+ list_splice(&old_list, &fb_info->modelist);
+ } else
+ fb_destroy_modelist(&old_list);
+
+ release_console_sem();
+
+ return 0;
+}
+
+static ssize_t show_modes(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ unsigned int i;
+ struct list_head *pos;
+ struct fb_modelist *modelist;
+ const struct fb_videomode *mode;
+
+ i = 0;
+ list_for_each(pos, &fb_info->modelist) {
+ modelist = list_entry(pos, struct fb_modelist, list);
+ mode = &modelist->mode;
+ i += mode_string(buf, i, mode);
+ }
+ return i;
+}
+
+static ssize_t store_bpp(struct class_device *class_device, const char * buf,
+ size_t count)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ struct fb_var_screeninfo var;
+ char ** last = NULL;
+ int err;
+
+ var = fb_info->var;
+ var.bits_per_pixel = simple_strtoul(buf, last, 0);
+ if ((err = activate(fb_info, &var)))
+ return err;
+ return count;
+}
+
+static ssize_t show_bpp(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
+}
+
+static ssize_t store_virtual(struct class_device *class_device,
+ const char * buf, size_t count)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ struct fb_var_screeninfo var;
+ char *last = NULL;
+ int err;
+
+ var = fb_info->var;
+ var.xres_virtual = simple_strtoul(buf, &last, 0);
+ last++;
+ if (last - buf >= count)
+ return -EINVAL;
+ var.yres_virtual = simple_strtoul(last, &last, 0);
+ printk(KERN_ERR "fb: xres %d yres %d\n", var.xres_virtual,
+ var.yres_virtual);
+
+ if ((err = activate(fb_info, &var)))
+ return err;
+ return count;
+}
+
+static ssize_t show_virtual(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
+ fb_info->var.yres_virtual);
+}
+
+static ssize_t store_cmap(struct class_device *class_device, const char * buf,
+ size_t count)
+{
+// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
+ return 0;
+}
+
+static ssize_t show_cmap(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ unsigned int offset = 0, i;
+
+ if (!fb_info->cmap.red || !fb_info->cmap.blue ||
+ fb_info->cmap.green || fb_info->cmap.transp)
+ return -EINVAL;
+
+ for (i = 0; i < fb_info->cmap.len; i++) {
+ offset += snprintf(buf, PAGE_SIZE - offset,
+ "%d,%d,%d,%d,%d\n", i + fb_info->cmap.start,
+ fb_info->cmap.red[i], fb_info->cmap.blue[i],
+ fb_info->cmap.green[i],
+ fb_info->cmap.transp[i]);
+ }
+ return offset;
+}
+
+static ssize_t store_blank(struct class_device *class_device, const char * buf,
+ size_t count)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ char *last = NULL;
+ int err;
+
+ acquire_console_sem();
+ fb_info->flags |= FBINFO_MISC_USEREVENT;
+ err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
+ fb_info->flags &= ~FBINFO_MISC_USEREVENT;
+ release_console_sem();
+ if (err < 0)
+ return err;
+ return count;
+}
+
+static ssize_t show_blank(struct class_device *class_device, char *buf)
+{
+// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
+ return 0;
+}
+
+static ssize_t store_console(struct class_device *class_device,
+ const char * buf, size_t count)
+{
+// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
+ return 0;
+}
+
+static ssize_t show_console(struct class_device *class_device, char *buf)
+{
+// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
+ return 0;
+}
+
+static ssize_t store_cursor(struct class_device *class_device,
+ const char * buf, size_t count)
+{
+// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
+ return 0;
+}
+
+static ssize_t show_cursor(struct class_device *class_device, char *buf)
+{
+// struct fb_info *fb_info = (struct fb_info *)class_get_devdata(class_device);
+ return 0;
+}
+
+static ssize_t store_pan(struct class_device *class_device, const char * buf,
+ size_t count)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ struct fb_var_screeninfo var;
+ char *last = NULL;
+ int err;
+
+ var = fb_info->var;
+ var.xoffset = simple_strtoul(buf, &last, 0);
+ last++;
+ if (last - buf >= count)
+ return -EINVAL;
+ var.yoffset = simple_strtoul(last, &last, 0);
+
+ acquire_console_sem();
+ err = fb_pan_display(fb_info, &var);
+ release_console_sem();
+
+ if (err < 0)
+ return err;
+ return count;
+}
+
+static ssize_t show_pan(struct class_device *class_device, char *buf)
+{
+ struct fb_info *fb_info =
+ (struct fb_info *)class_get_devdata(class_device);
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
+ fb_info->var.xoffset);
+}
+
+static struct class_device_attribute class_device_attrs[] = {
+ __ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp),
+ __ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank),
+ __ATTR(color_map, S_IRUGO|S_IWUSR, show_cmap, store_cmap),
+ __ATTR(console, S_IRUGO|S_IWUSR, show_console, store_console),
+ __ATTR(cursor, S_IRUGO|S_IWUSR, show_cursor, store_cursor),
+ __ATTR(mode, S_IRUGO|S_IWUSR, show_mode, store_mode),
+ __ATTR(modes, S_IRUGO|S_IWUSR, show_modes, store_modes),
+ __ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
+ __ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
+};
+
+int fb_init_class_device(struct fb_info *fb_info)
+{
+ unsigned int i;
+ class_set_devdata(fb_info->class_device, fb_info);
+
+ for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
+ class_device_create_file(fb_info->class_device,
+ &class_device_attrs[i]);
+ return 0;
+}
+
+void fb_cleanup_class_device(struct fb_info *fb_info)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
+ class_device_remove_file(fb_info->class_device,
+ &class_device_attrs[i]);
+}
+
+
git://git.onelab.eu / linux-2.6.git / blobdiff