diff options
Diffstat (limited to 'drivers/video/fbsysfs.c')
| -rw-r--r-- | drivers/video/fbsysfs.c | 449 |
1 files changed, 0 insertions, 449 deletions
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c deleted file mode 100644 index ed1d4d1ac4f..00000000000 --- a/drivers/video/fbsysfs.c +++ /dev/null @@ -1,449 +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/fb.h> -#include <linux/console.h> - -/** - * 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 occured. - * - */ -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 = kmalloc(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; - - 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 - * framebuffer info structure. - * - */ -void framebuffer_release(struct fb_info *info) -{ - 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; - 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); - - 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); -} - -/* Format for cmap is "%02x%c%4x%4x%4x\n" */ -/* %02x entry %c transp %4x red %4x blue %4x green \n */ -/* 256 rows at 16 chars equals 4096, the normal page size */ -/* the code will automatically adjust for different page sizes */ -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); - int rc, i, start, length, transp = 0; - - if ((count > PAGE_SIZE) || ((count % 16) != 0)) - return -EINVAL; - - if (!fb_info->fbops->fb_setcolreg && !fb_info->fbops->fb_setcmap) - return -EINVAL; - - sscanf(buf, "%02x", &start); - length = count / 16; - - for (i = 0; i < length; i++) - if (buf[i * 16 + 2] != ' ') - transp = 1; - - /* If we can batch, do it */ - if (fb_info->fbops->fb_setcmap && length > 1) { - struct fb_cmap umap; - - memset(&umap, 0, sizeof(umap)); - if ((rc = fb_alloc_cmap(&umap, length, transp))) - return rc; - - umap.start = start; - for (i = 0; i < length; i++) { - sscanf(&buf[i * 16 + 3], "%4hx", &umap.red[i]); - sscanf(&buf[i * 16 + 7], "%4hx", &umap.blue[i]); - sscanf(&buf[i * 16 + 11], "%4hx", &umap.green[i]); - if (transp) - umap.transp[i] = (buf[i * 16 + 2] != ' '); - } - rc = fb_info->fbops->fb_setcmap(&umap, fb_info); - fb_copy_cmap(&umap, &fb_info->cmap); - fb_dealloc_cmap(&umap); - - return rc; - } - for (i = 0; i < length; i++) { - u16 red, blue, green, tsp; - - sscanf(&buf[i * 16 + 3], "%4hx", &red); - sscanf(&buf[i * 16 + 7], "%4hx", &blue); - sscanf(&buf[i * 16 + 11], "%4hx", &green); - tsp = (buf[i * 16 + 2] != ' '); - if ((rc = fb_info->fbops->fb_setcolreg(start++, - red, green, blue, tsp, fb_info))) - return rc; - - fb_info->cmap.red[i] = red; - fb_info->cmap.blue[i] = blue; - fb_info->cmap.green[i] = green; - if (transp) - fb_info->cmap.transp[i] = tsp; - } - 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 i; - - if (!fb_info->cmap.red || !fb_info->cmap.blue || - !fb_info->cmap.green) - return -EINVAL; - - if (fb_info->cmap.len > PAGE_SIZE / 16) - return -EINVAL; - - /* don't mess with the format, the buffer is PAGE_SIZE */ - /* 256 entries at 16 chars per line equals 4096 = PAGE_SIZE */ - for (i = 0; i < fb_info->cmap.len; i++) { - snprintf(&buf[ i * 16], PAGE_SIZE - i * 16, "%02x%c%4x%4x%4x\n", i + fb_info->cmap.start, - ((fb_info->cmap.transp && fb_info->cmap.transp[i]) ? '*' : ' '), - fb_info->cmap.red[i], fb_info->cmap.blue[i], - fb_info->cmap.green[i]); - } - return 16 * fb_info->cmap.len; -} - -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]); -} - - |
