#include <linux/kernel.h>
#include <linux/fb.h>
+#include <linux/console.h>
+#include <linux/module.h>
+
+#define FB_SYSFS_FLAG_ATTR 1
/**
* framebuffer_alloc - creates a new frame buffer info structure
if (size)
fb_info_size += PADDING;
- p = kmalloc(fb_info_size + size, GFP_KERNEL);
+ p = kzalloc(fb_info_size + size, GFP_KERNEL);
+
if (!p)
return NULL;
- memset(p, 0, fb_info_size + size);
+
info = (struct fb_info *) p;
if (size)
info->par = p + fb_info_size;
+ info->device = dev;
+
+#ifdef CONFIG_FB_BACKLIGHT
+ mutex_init(&info->bl_mutex);
+#endif
+
return info;
#undef PADDING
#undef BYTES_PER_LONG
}
+EXPORT_SYMBOL(framebuffer_alloc);
/**
* framebuffer_release - marks the structure available for freeing
*
* @info: frame buffer info structure
*
- * Drop the reference count of the class_device embedded in the
+ * Drop the reference count of the device embedded in the
* framebuffer info structure.
*
*/
{
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';
+ char v = 'p';
+
+ 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';
+
+ if (mode->vmode & FB_VMODE_INTERLACED)
+ v = 'i';
+ if (mode->vmode & FB_VMODE_DOUBLE)
+ v = 'd';
+
+ return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d%c-%d\n",
+ m, mode->xres, mode->yres, v, mode->refresh);
+}
+
+static ssize_t store_mode(struct device *device, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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 device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+
+ if (!fb_info->mode)
+ return 0;
+
+ return mode_string(buf, 0, fb_info->mode);
+}
+
+static ssize_t store_modes(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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 device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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 device *device, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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 device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
+}
+
+static ssize_t store_rotate(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ struct fb_var_screeninfo var;
+ char **last = NULL;
+ int err;
+
+ var = fb_info->var;
+ var.rotate = simple_strtoul(buf, last, 0);
+
+ if ((err = activate(fb_info, &var)))
+ return err;
+
+ return count;
+}
+
+
+static ssize_t show_rotate(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.rotate);
+}
+
+static ssize_t store_virtual(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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);
+
+ if ((err = activate(fb_info, &var)))
+ return err;
+ return count;
+}
+
+static ssize_t show_virtual(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
+ fb_info->var.yres_virtual);
+}
+
+static ssize_t show_stride(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
+}
+
+static ssize_t store_blank(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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 device *device,
+ struct device_attribute *attr, char *buf)
+{
+// struct fb_info *fb_info = dev_get_drvdata(device);
+ return 0;
+}
+
+static ssize_t store_console(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+// struct fb_info *fb_info = dev_get_drvdata(device);
+ return 0;
+}
+
+static ssize_t show_console(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+// struct fb_info *fb_info = dev_get_drvdata(device);
+ return 0;
+}
+
+static ssize_t store_cursor(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+// struct fb_info *fb_info = dev_get_drvdata(device);
+ return 0;
+}
+
+static ssize_t show_cursor(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+// struct fb_info *fb_info = dev_get_drvdata(device);
+ return 0;
+}
+
+static ssize_t store_pan(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(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 device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
+ fb_info->var.xoffset);
+}
+
+static ssize_t show_name(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
+}
+
+static ssize_t store_fbstate(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ u32 state;
+ char *last = NULL;
+
+ state = simple_strtoul(buf, &last, 0);
+
+ acquire_console_sem();
+ fb_set_suspend(fb_info, (int)state);
+ release_console_sem();
+
+ return count;
+}
+
+static ssize_t show_fbstate(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
+}
+
+#ifdef CONFIG_FB_BACKLIGHT
+static ssize_t store_bl_curve(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ u8 tmp_curve[FB_BACKLIGHT_LEVELS];
+ unsigned int i;
+
+ /* Some drivers don't use framebuffer_alloc(), but those also
+ * don't have backlights.
+ */
+ if (!fb_info || !fb_info->bl_dev)
+ return -ENODEV;
+
+ if (count != (FB_BACKLIGHT_LEVELS / 8 * 24))
+ return -EINVAL;
+
+ for (i = 0; i < (FB_BACKLIGHT_LEVELS / 8); ++i)
+ if (sscanf(&buf[i * 24],
+ "%2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx %2hhx\n",
+ &tmp_curve[i * 8 + 0],
+ &tmp_curve[i * 8 + 1],
+ &tmp_curve[i * 8 + 2],
+ &tmp_curve[i * 8 + 3],
+ &tmp_curve[i * 8 + 4],
+ &tmp_curve[i * 8 + 5],
+ &tmp_curve[i * 8 + 6],
+ &tmp_curve[i * 8 + 7]) != 8)
+ return -EINVAL;
+
+ /* If there has been an error in the input data, we won't
+ * reach this loop.
+ */
+ mutex_lock(&fb_info->bl_mutex);
+ for (i = 0; i < FB_BACKLIGHT_LEVELS; ++i)
+ fb_info->bl_curve[i] = tmp_curve[i];
+ mutex_unlock(&fb_info->bl_mutex);
+
+ return count;
+}
+
+static ssize_t show_bl_curve(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct fb_info *fb_info = dev_get_drvdata(device);
+ ssize_t len = 0;
+ unsigned int i;
+
+ /* Some drivers don't use framebuffer_alloc(), but those also
+ * don't have backlights.
+ */
+ if (!fb_info || !fb_info->bl_dev)
+ return -ENODEV;
+
+ mutex_lock(&fb_info->bl_mutex);
+ for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8)
+ len += snprintf(&buf[len], PAGE_SIZE,
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ fb_info->bl_curve[i + 0],
+ fb_info->bl_curve[i + 1],
+ fb_info->bl_curve[i + 2],
+ fb_info->bl_curve[i + 3],
+ fb_info->bl_curve[i + 4],
+ fb_info->bl_curve[i + 5],
+ fb_info->bl_curve[i + 6],
+ fb_info->bl_curve[i + 7]);
+ mutex_unlock(&fb_info->bl_mutex);
+
+ return len;
+}
+#endif
+
+/* When cmap is added back in it should be a binary attribute
+ * not a text one. Consideration should also be given to converting
+ * fbdev to use configfs instead of sysfs */
+static struct device_attribute 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(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),
+ __ATTR(name, S_IRUGO, show_name, NULL),
+ __ATTR(stride, S_IRUGO, show_stride, NULL),
+ __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
+ __ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
+#ifdef CONFIG_FB_BACKLIGHT
+ __ATTR(bl_curve, S_IRUGO|S_IWUSR, show_bl_curve, store_bl_curve),
+#endif
+};
+
+int fb_init_device(struct fb_info *fb_info)
+{
+ int i, error = 0;
+
+ dev_set_drvdata(fb_info->dev, fb_info);
+
+ fb_info->class_flag |= FB_SYSFS_FLAG_ATTR;
+
+ for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
+ error = device_create_file(fb_info->dev, &device_attrs[i]);
+
+ if (error)
+ break;
+ }
+
+ if (error) {
+ while (--i >= 0)
+ device_remove_file(fb_info->dev, &device_attrs[i]);
+ fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR;
+ }
+
+ return 0;
+}
+
+void fb_cleanup_device(struct fb_info *fb_info)
+{
+ unsigned int i;
+
+ if (fb_info->class_flag & FB_SYSFS_FLAG_ATTR) {
+ for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
+ device_remove_file(fb_info->dev, &device_attrs[i]);
+
+ fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR;
+ }
+}
+
+#ifdef CONFIG_FB_BACKLIGHT
+/* This function generates a linear backlight curve
+ *
+ * 0: off
+ * 1-7: min
+ * 8-127: linear from min to max
+ */
+void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max)
+{
+ unsigned int i, flat, count, range = (max - min);
+
+ fb_info->bl_curve[0] = off;
+
+ for (flat = 1; flat < (FB_BACKLIGHT_LEVELS / 16); ++flat)
+ fb_info->bl_curve[flat] = min;
+
+ count = FB_BACKLIGHT_LEVELS * 15 / 16;
+ for (i = 0; i < count; ++i)
+ fb_info->bl_curve[flat + i] = min + (range * (i + 1) / count);
+}
+EXPORT_SYMBOL_GPL(fb_bl_default_curve);
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff