X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fvideo%2Ffbmem.c;h=33ebdb198dafbf5776ff5a5ac4a39c35fecf1464;hb=2fceef397f9880b212a74c418290ce69e7ac00eb;hp=0740272047022a01977bfe704821b476ecc0ab38;hpb=53fdc5185c994ad6def3729a905ac4a47c477c9d;p=linux-2.6-omap-h63xx.git diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 07402720470..33ebdb198da 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #ifdef CONFIG_KMOD #include @@ -632,27 +633,51 @@ int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } int fb_show_logo(struct fb_info *info, int rotate) { return 0; } #endif /* CONFIG_LOGO */ -static int fbmem_read_proc(char *buf, char **start, off_t offset, - int len, int *eof, void *private) +static void *fb_seq_start(struct seq_file *m, loff_t *pos) { - struct fb_info **fi; - int clen; - - clen = 0; - for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && clen < 4000; - fi++) - if (*fi) - clen += sprintf(buf + clen, "%d %s\n", - (*fi)->node, - (*fi)->fix.id); - *start = buf + offset; - if (clen > offset) - clen -= offset; - else - clen = 0; - return clen < len ? clen : len; + return (*pos < FB_MAX) ? pos : NULL; +} + +static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) +{ + (*pos)++; + return (*pos < FB_MAX) ? pos : NULL; +} + +static void fb_seq_stop(struct seq_file *m, void *v) +{ +} + +static int fb_seq_show(struct seq_file *m, void *v) +{ + int i = *(loff_t *)v; + struct fb_info *fi = registered_fb[i]; + + if (fi) + seq_printf(m, "%d %s\n", fi->node, fi->fix.id); + return 0; +} + +static const struct seq_operations proc_fb_seq_ops = { + .start = fb_seq_start, + .next = fb_seq_next, + .stop = fb_seq_stop, + .show = fb_seq_show, +}; + +static int proc_fb_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &proc_fb_seq_ops); } +static const struct file_operations fb_proc_fops = { + .owner = THIS_MODULE, + .open = proc_fb_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + static ssize_t fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { @@ -1057,7 +1082,7 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, case FBIOPUT_CON2FBMAP: if (copy_from_user(&con2fb, argp, sizeof(con2fb))) return - EFAULT; - if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) + if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) return -EINVAL; if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) return -EINVAL; @@ -1301,20 +1326,27 @@ fb_open(struct inode *inode, struct file *file) if (fbidx >= FB_MAX) return -ENODEV; + lock_kernel(); #ifdef CONFIG_KMOD if (!(info = registered_fb[fbidx])) try_to_load(fbidx); #endif /* CONFIG_KMOD */ - if (!(info = registered_fb[fbidx])) - return -ENODEV; - if (!try_module_get(info->fbops->owner)) - return -ENODEV; + if (!(info = registered_fb[fbidx])) { + res = -ENODEV; + goto out; + } + if (!try_module_get(info->fbops->owner)) { + res = -ENODEV; + goto out; + } file->private_data = info; if (info->fbops->fb_open) { res = info->fbops->fb_open(info,1); if (res) module_put(info->fbops->owner); } +out: + unlock_kernel(); return res; } @@ -1352,6 +1384,32 @@ static const struct file_operations fb_fops = { struct class *fb_class; EXPORT_SYMBOL(fb_class); + +static int fb_check_foreignness(struct fb_info *fi) +{ + const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; + + fi->flags &= ~FBINFO_FOREIGN_ENDIAN; + +#ifdef __BIG_ENDIAN + fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; +#else + fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; +#endif /* __BIG_ENDIAN */ + + if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { + pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " + "support this framebuffer\n", fi->fix.id); + return -ENOSYS; + } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { + pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " + "support this framebuffer\n", fi->fix.id); + return -ENOSYS; + } + + return 0; +} + /** * register_framebuffer - registers a frame buffer device * @fb_info: frame buffer info structure @@ -1371,6 +1429,10 @@ register_framebuffer(struct fb_info *fb_info) if (num_registered_fb == FB_MAX) return -ENXIO; + + if (fb_check_foreignness(fb_info)) + return -ENOSYS; + num_registered_fb++; for (i = 0 ; i < FB_MAX; i++) if (!registered_fb[i]) @@ -1503,7 +1565,7 @@ void fb_set_suspend(struct fb_info *info, int state) static int __init fbmem_init(void) { - create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); + proc_create("fb", 0, NULL, &fb_proc_fops); if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) printk("unable to get major %d for fb devs\n", FB_MAJOR); @@ -1521,6 +1583,7 @@ module_init(fbmem_init); static void __exit fbmem_exit(void) { + remove_proc_entry("fb", NULL); class_destroy(fb_class); unregister_chrdev(FB_MAJOR, "fb"); } @@ -1567,8 +1630,6 @@ int fb_new_modelist(struct fb_info *info) static char *video_options[FB_MAX] __read_mostly; static int ofonly __read_mostly; -extern const char *global_mode_option; - /** * fb_get_options - get kernel boot parameters * @name: framebuffer name as it would appear in @@ -1636,7 +1697,7 @@ static int __init video_setup(char *options) } if (!global && !strstr(options, "fb:")) { - global_mode_option = options; + fb_mode_option = options; global = 1; } @@ -1663,7 +1724,6 @@ EXPORT_SYMBOL(register_framebuffer); EXPORT_SYMBOL(unregister_framebuffer); EXPORT_SYMBOL(num_registered_fb); EXPORT_SYMBOL(registered_fb); -EXPORT_SYMBOL(fb_prepare_logo); EXPORT_SYMBOL(fb_show_logo); EXPORT_SYMBOL(fb_set_var); EXPORT_SYMBOL(fb_blank);