diff options
Diffstat (limited to 'drivers/video/fbsysfs.c')
| -rw-r--r-- | drivers/video/fbsysfs.c | 586 |
1 files changed, 0 insertions, 586 deletions
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c deleted file mode 100644 index 53444ac19fe0..000000000000 --- a/drivers/video/fbsysfs.c +++ /dev/null @@ -1,586 +0,0 @@ -/* - * fbsysfs.c - framebuffer device class and attributes - * - * Copyright (c) 2004 James Simmons <jsimmons@infradead.org> - * - * This program is free software you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -/* - * Note: currently there's only stubs for framebuffer_alloc and - * framebuffer_release here. The reson for that is that until all drivers - * are converted to use it a sysfsification will open OOPSable races. - */ - -#include <linux/kernel.h> -#include <linux/slab.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 - * - * @size: size of driver private data, can be zero - * @dev: pointer to the device for this fb, this can be NULL - * - * Creates a new frame buffer info structure. Also reserves @size bytes - * for driver private data (info->par). info->par (if any) will be - * aligned to sizeof(long). - * - * Returns the new structure, or NULL if an error occurred. - * - */ -struct fb_info *framebuffer_alloc(size_t size, struct device *dev) -{ -#define BYTES_PER_LONG (BITS_PER_LONG/8) -#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG)) - int fb_info_size = sizeof(struct fb_info); - struct fb_info *info; - char *p; - - if (size) - fb_info_size += PADDING; - - p = kzalloc(fb_info_size + size, GFP_KERNEL); - - if (!p) - return NULL; - - info = (struct fb_info *) p; - - if (size) - info->par = p + fb_info_size; - - info->device = dev; - -#ifdef CONFIG_FB_BACKLIGHT - mutex_init(&info->bl_curve_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 device embedded in the - * framebuffer info structure. - * - */ -void framebuffer_release(struct fb_info *info) -{ - if (!info) - return; - kfree(info->apertures); - kfree(info); -} -EXPORT_SYMBOL(framebuffer_release); - -static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var) -{ - int err; - - var->activate |= FB_ACTIVATE_FORCE; - console_lock(); - fb_info->flags |= FBINFO_MISC_USEREVENT; - err = fb_set_var(fb_info, var); - fb_info->flags &= ~FBINFO_MISC_USEREVENT; - console_unlock(); - 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; - - console_lock(); - if (!lock_fb_info(fb_info)) { - console_unlock(); - return -ENODEV; - } - - list_splice(&fb_info->modelist, &old_list); - fb_videomode_to_modelist((const 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); - - unlock_fb_info(fb_info); - console_unlock(); - - 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; - - console_lock(); - fb_info->flags |= FBINFO_MISC_USEREVENT; - err = fb_blank(fb_info, simple_strtoul(buf, &last, 0)); - fb_info->flags &= ~FBINFO_MISC_USEREVENT; - console_unlock(); - 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); - - console_lock(); - err = fb_pan_display(fb_info, &var); - console_unlock(); - - 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.yoffset); -} - -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); - - console_lock(); - if (!lock_fb_info(fb_info)) { - console_unlock(); - return -ENODEV; - } - - fb_set_suspend(fb_info, (int)state); - - unlock_fb_info(fb_info); - console_unlock(); - - 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_curve_mutex); - for (i = 0; i < FB_BACKLIGHT_LEVELS; ++i) - fb_info->bl_curve[i] = tmp_curve[i]; - mutex_unlock(&fb_info->bl_curve_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_curve_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_curve_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); - - mutex_lock(&fb_info->bl_curve_mutex); - - 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); - - mutex_unlock(&fb_info->bl_curve_mutex); -} -EXPORT_SYMBOL_GPL(fb_bl_default_curve); -#endif |