/* * linux/drivers/video/fbmem.c * * Copyright (C) 1994 Martin Schaller * * 2001 - Documented with DocBook * - Brad Douglas * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_KMOD #include #endif #include #include #include #include #include #if defined(__mc68000__) || defined(CONFIG_APUS) #include #endif #include #include #include #include #include /* * Frame buffer device initialization and setup routines */ #define FBPIXMAPSIZE (1024 * 8) static struct notifier_block *fb_notifier_list; struct fb_info *registered_fb[FB_MAX]; int num_registered_fb; /* * Helpers */ int fb_get_color_depth(struct fb_var_screeninfo *var) { if (var->green.length == var->blue.length && var->green.length == var->red.length && !var->green.offset && !var->blue.offset && !var->red.offset) return var->green.length; else return (var->green.length + var->red.length + var->blue.length); } EXPORT_SYMBOL(fb_get_color_depth); /* * Drawing helpers. */ void fb_iomove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf, u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) { int i; for (i = height; i--; ) { buf->outbuf(info, dst, src, s_pitch); src += s_pitch; dst += d_pitch; } } void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf, u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) { int i, j; for (i = height; i--; ) { for (j = 0; j < s_pitch; j++) dst[j] = src[j]; src += s_pitch; dst += d_pitch; } } void fb_iomove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf, u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, u32 shift_high, u32 shift_low, u32 mod) { u8 mask = (u8) (0xfff << shift_high), tmp; int i, j; for (i = height; i--; ) { for (j = 0; j < idx; j++) { tmp = buf->inbuf(info, dst+j); tmp &= mask; tmp |= *src >> shift_low; buf->outbuf(info, dst+j, &tmp, 1); tmp = *src << shift_high; buf->outbuf(info, dst+j+1, &tmp, 1); src++; } tmp = buf->inbuf(info, dst+idx); tmp &= mask; tmp |= *src >> shift_low; buf->outbuf(info, dst+idx, &tmp, 1); if (shift_high < mod) { tmp = *src << shift_high; buf->outbuf(info, dst+idx+1, &tmp, 1); } src++; dst += d_pitch; } } void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf, u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, u32 shift_high, u32 shift_low, u32 mod) { u8 mask = (u8) (0xfff << shift_high), tmp; int i, j; for (i = height; i--; ) { for (j = 0; j < idx; j++) { tmp = dst[j]; tmp &= mask; tmp |= *src >> shift_low; dst[j] = tmp; tmp = *src << shift_high; dst[j+1] = tmp; src++; } tmp = dst[idx]; tmp &= mask; tmp |= *src >> shift_low; dst[idx] = tmp; if (shift_high < mod) { tmp = *src << shift_high; dst[idx+1] = tmp; } src++; dst += d_pitch; } } /* * we need to lock this section since fb_cursor * may use fb_imageblit() */ char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) { u32 align = buf->buf_align - 1, offset; char *addr = buf->addr; /* If IO mapped, we need to sync before access, no sharing of * the pixmap is done */ if (buf->flags & FB_PIXMAP_IO) { if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) info->fbops->fb_sync(info); return addr; } /* See if we fit in the remaining pixmap space */ offset = buf->offset + align; offset &= ~align; if (offset + size > buf->size) { /* We do not fit. In order to be able to re-use the buffer, * we must ensure no asynchronous DMA'ing or whatever operation * is in progress, we sync for that. */ if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) info->fbops->fb_sync(info); offset = 0; } buf->offset = offset + size; addr += offset; return addr; } #ifdef CONFIG_LOGO #include static inline unsigned safe_shift(unsigned d, int n) { return n < 0 ? d >> -n : d << n; } static void fb_set_logocmap(struct fb_info *info, const struct linux_logo *logo) { struct fb_cmap palette_cmap; u16 palette_green[16]; u16 palette_blue[16]; u16 palette_red[16]; int i, j, n; const unsigned char *clut = logo->clut; palette_cmap.start = 0; palette_cmap.len = 16; palette_cmap.red = palette_red; palette_cmap.green = palette_green; palette_cmap.blue = palette_blue; palette_cmap.transp = NULL; for (i = 0; i < logo->clutsize; i += n) { n = logo->clutsize - i; /* palette_cmap provides space for only 16 colors at once */ if (n > 16) n = 16; palette_cmap.start = 32 + i; palette_cmap.len = n; for (j = 0; j < n; ++j) { palette_cmap.red[j] = clut[0] << 8 | clut[0]; palette_cmap.green[j] = clut[1] << 8 | clut[1]; palette_cmap.blue[j] = clut[2] << 8 | clut[2]; clut += 3; } fb_set_cmap(&palette_cmap, info); } } static void fb_set_logo_truepalette(struct fb_info *info, const struct linux_logo *logo, u32 *palette) { unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; unsigned char redmask, greenmask, bluemask; int redshift, greenshift, blueshift; int i; const unsigned char *clut = logo->clut; /* * We have to create a temporary palette since console palette is only * 16 colors long. */ /* Bug: Doesn't obey msb_right ... (who needs that?) */ redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; redshift = info->var.red.offset - (8 - info->var.red.length); greenshift = info->var.green.offset - (8 - info->var.green.length); blueshift = info->var.blue.offset - (8 - info->var.blue.length); for ( i = 0; i < logo->clutsize; i++) { palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | safe_shift((clut[1] & greenmask), greenshift) | safe_shift((clut[2] & bluemask), blueshift)); clut += 3; } } static void fb_set_logo_directpalette(struct fb_info *info, const struct linux_logo *logo, u32 *palette) { int redshift, greenshift, blueshift; int i; redshift = info->var.red.offset; greenshift = info->var.green.offset; blueshift = info->var.blue.offset; for (i = 32; i < logo->clutsize; i++) palette[i] = i << redshift | i << greenshift | i << blueshift; } static void fb_set_logo(struct fb_info *info, const struct linux_logo *logo, u8 *dst, int depth) { int i, j, k, fg = 1; const u8 *src = logo->data; u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; if (fb_get_color_depth(&info->var) == 3) fg = 7; switch (depth) { case 4: for (i = 0; i < logo->height; i++) for (j = 0; j < logo->width; src++) { *dst++ = *src >> 4; j++; if (j < logo->width) { *dst++ = *src & 0x0f; j++; } } break; case 1: for (i = 0; i < logo->height; i++) { for (j = 0; j < logo->width; src++) { d = *src ^ xor; for (k = 7; k >= 0; k--) { *dst++ = ((d >> k) & 1) ? fg : 0; j++; } } } break; } } /* * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on * the visual format and color depth of the framebuffer, the DAC, the * pseudo_palette, and the logo data will be adjusted accordingly. * * Case 1 - linux_logo_clut224: * Color exceeds the number of console colors (16), thus we set the hardware DAC * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. * * For visuals that require color info from the pseudo_palette, we also construct * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags * will be set. * * Case 2 - linux_logo_vga16: * The number of colors just matches the console colors, thus there is no need * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, * each byte contains color information for two pixels (upper and lower nibble). * To be consistent with fb_imageblit() usage, we therefore separate the two * nibbles into separate bytes. The "depth" flag will be set to 4. * * Case 3 - linux_logo_mono: * This is similar with Case 2. Each byte contains information for 8 pixels. * We isolate each bit and expand each into a byte. The "depth" flag will * be set to 1. */ static struct logo_data { int depth; int needs_directpalette; int needs_truepalette; int needs_cmapreset; const struct linux_logo *logo; } fb_logo; int fb_prepare_logo(struct fb_info *info) { int depth = fb_get_color_depth(&info->var); memset(&fb_logo, 0, sizeof(struct logo_data)); if (info->flags & FBINFO_MISC_TILEBLITTING) return 0; if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { depth = info->var.blue.length; if (info->var.red.length < depth) depth = info->var.red.length; if (info->var.green.length < depth) depth = info->var.green.length; } if (depth >= 8) { switch (info->fix.visual) { case FB_VISUAL_TRUECOLOR: fb_logo.needs_truepalette = 1; break; case FB_VISUAL_DIRECTCOLOR: fb_logo.needs_directpalette = 1; fb_logo.needs_cmapreset = 1; break; case FB_VISUAL_PSEUDOCOLOR: fb_logo.needs_cmapreset = 1; break; } } /* Return if no suitable logo was found */ fb_logo.logo = fb_find_logo(depth); if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) { fb_logo.logo = NULL; return 0; } /* What depth we asked for might be different from what we get */ if (fb_logo.logo->type == LINUX_LOGO_CLUT224) fb_logo.depth = 8; else if (fb_logo.logo->type == LINUX_LOGO_VGA16) fb_logo.depth = 4; else fb_logo.depth = 1; return fb_logo.logo->height; } int fb_show_logo(struct fb_info *info) { u32 *palette = NULL, *saved_pseudo_palette = NULL; unsigned char *logo_new = NULL; struct fb_image image; int x; /* Return if the frame buffer is not mapped or suspended */ if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) return 0; image.depth = 8; image.data = fb_logo.logo->data; if (fb_logo.needs_cmapreset) fb_set_logocmap(info, fb_logo.logo); if (fb_logo.needs_truepalette || fb_logo.needs_directpalette) { palette = kmalloc(256 * 4, GFP_KERNEL); if (palette == NULL) return 0; if (fb_logo.needs_truepalette) fb_set_logo_truepalette(info, fb_logo.logo, palette); else fb_set_logo_directpalette(info, fb_logo.logo, palette); saved_pseudo_palette = info->pseudo_palette; info->pseudo_palette = palette; } if (fb_logo.depth <= 4) { logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, GFP_KERNEL); if (logo_new == NULL) { kfree(palette); if (saved_pseudo_palette) info->pseudo_palette = saved_pseudo_palette; return 0; } image.data = logo_new; fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); } image.width = fb_logo.logo->width; image.height = fb_logo.logo->height; image.dy = 0; for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) && x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) { image.dx = x; info->fbops->fb_imageblit(info, &image); } kfree(palette); if (saved_pseudo_palette != NULL) info->pseudo_palette = saved_pseudo_palette; kfree(logo_new); return fb_logo.logo->height; } #else int fb_prepare_logo(struct fb_info *info) { return 0; } int fb_show_logo(struct fb_info *info) { return 0; } #endif /* CONFIG_LOGO */ static int fbmem_read_proc(char *buf, char **start, off_t offset, int len, int *eof, void *private) { struct fb_info **fi; int clen; clen = 0; for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 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; } static ssize_t fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { unsigned long p = *ppos; struct inode *inode = file->f_dentry->d_inode; int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; u32 *buffer, *dst; u32 __iomem *src; int c, i, cnt = 0, err = 0; unsigned long total_size; if (!info || ! info->screen_base) return -ENODEV; if (info->state != FBINFO_STATE_RUNNING) return -EPERM; if (info->fbops->fb_read) return info->fbops->fb_read(file, buf, count, ppos); total_size = info->screen_size; if (total_size == 0) total_size = info->fix.smem_len; if (p >= total_size) return 0; if (count >= total_size) count = total_size; if (count + p > total_size) count = total_size - p; cnt = 0; buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL); if (!buffer) return -ENOMEM; src = (u32 __iomem *) (info->screen_base + p); if (info->fbops->fb_sync) info->fbops->fb_sync(info); while (count) { c = (count > PAGE_SIZE) ? PAGE_SIZE : count; dst = buffer; for (i = c >> 2; i--; ) *dst++ = fb_readl(src++); if (c & 3) { u8 *dst8 = (u8 *) dst; u8 __iomem *src8 = (u8 __iomem *) src; for (i = c & 3; i--;) *dst8++ = fb_readb(src8++); src = (u32 __iomem *) src8; } if (copy_to_user(buf, buffer, c)) { err = -EFAULT; break; } *ppos += c; buf += c; cnt += c; count -= c; } kfree(buffer); return (err) ? err : cnt; } static ssize_t fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { unsigned long p = *ppos; struct inode *inode = file->f_dentry->d_inode; int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; u32 *buffer, *src; u32 __iomem *dst; int c, i, cnt = 0, err; unsigned long total_size; if (!info || !info->screen_base) return -ENODEV; if (info->state != FBINFO_STATE_RUNNING) return -EPERM; if (info->fbops->fb_write) return info->fbops->fb_write(file, buf, count, ppos); total_size = info->screen_size; if (total_size == 0) total_size = info->fix.smem_len; if (p > total_size) return -ENOSPC; if (count >= total_size) count = total_size; err = 0; if (count + p > total_size) { count = total_size - p; err = -ENOSPC; } cnt = 0; buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL); if (!buffer) return -ENOMEM; dst = (u32 __iomem *) (info->screen_base + p); if (info->fbops->fb_sync) info->fbops->fb_sync(info); while (count) { c = (count > PAGE_SIZE) ? PAGE_SIZE : count; src = buffer; if (copy_from_user(src, buf, c)) { err = -EFAULT; break; } for (i = c >> 2; i--; ) fb_writel(*src++, dst++); if (c & 3) { u8 *src8 = (u8 *) src; u8 __iomem *dst8 = (u8 __iomem *) dst; for (i = c & 3; i--; ) fb_writeb(*src8++, dst8++); dst = (u32 __iomem *) dst8; } *ppos += c; buf += c; cnt += c; count -= c; } kfree(buffer); return (err) ? err : cnt; } #ifdef CONFIG_KMOD static void try_to_load(int fb) { request_module("fb%d", fb); } #endif /* CONFIG_KMOD */ int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) { int xoffset = var->xoffset; int yoffset = var->yoffset; int err; if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display || xoffset + info->var.xres > info->var.xres_virtual || yoffset + info->var.yres > info->var.yres_virtual) return -EINVAL; if ((err = info->fbops->fb_pan_display(var, info))) return err; info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; if (var->vmode & FB_VMODE_YWRAP) info->var.vmode |= FB_VMODE_YWRAP; else info->var.vmode &= ~FB_VMODE_YWRAP; return 0; } int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) { int err; if (var->activate & FB_ACTIVATE_INV_MODE) { struct fb_videomode mode1, mode2; int ret = 0; fb_var_to_videomode(&mode1, var); fb_var_to_videomode(&mode2, &info->var); /* make sure we don't delete the videomode of current var */ ret = fb_mode_is_equal(&mode1, &mode2); if (!ret) { struct fb_event event; event.info = info; event.data = &mode1; ret = notifier_call_chain(&fb_notifier_list, FB_EVENT_MODE_DELETE, &event); } if (!ret) fb_delete_videomode(&mode1, &info->modelist); return ret; } if ((var->activate & FB_ACTIVATE_FORCE) || memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { if (!info->fbops->fb_check_var) { *var = info->var; return 0; } if ((err = info->fbops->fb_check_var(var, info))) return err; if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { struct fb_videomode mode; int err = 0; info->var = *var; if (info->fbops->fb_set_par) info->fbops->fb_set_par(info); fb_pan_display(info, &info->var); fb_set_cmap(&info->cmap, info); fb_var_to_videomode(&mode, &info->var); if (info->modelist.prev && info->modelist.next && !list_empty(&info->modelist)) err = fb_add_videomode(&mode, &info->modelist); if (!err && info->flags & FBINFO_MISC_USEREVENT) { struct fb_event event; info->flags &= ~FBINFO_MISC_USEREVENT; event.info = info; notifier_call_chain(&fb_notifier_list, FB_EVENT_MODE_CHANGE, &event); } } } return 0; } int fb_blank(struct fb_info *info, int blank) { int ret = -EINVAL; if (blank > FB_BLANK_POWERDOWN) blank = FB_BLANK_POWERDOWN; if (info->fbops->fb_blank) ret = info->fbops->fb_blank(blank, info); if (!ret) { struct fb_event event; event.info = info; event.data = ␣ notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event); } return ret; } static int fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; struct fb_var_screeninfo var; struct fb_fix_screeninfo fix; struct fb_con2fbmap con2fb; struct fb_cmap_user cmap; struct fb_event event; void __user *argp = (void __user *)arg; int i; if (!fb) return -ENODEV; switch (cmd) { case FBIOGET_VSCREENINFO: return copy_to_user(argp, &info->var, sizeof(var)) ? -EFAULT : 0; case FBIOPUT_VSCREENINFO: if (copy_from_user(&var, argp, sizeof(var))) return -EFAULT; acquire_console_sem(); info->flags |= FBINFO_MISC_USEREVENT; i = fb_set_var(info, &var); info->flags &= ~FBINFO_MISC_USEREVENT; release_console_sem(); if (i) return i; if (copy_to_user(argp, &var, sizeof(var))) return -EFAULT; return 0; case FBIOGET_FSCREENINFO: return copy_to_user(argp, &info->fix, sizeof(fix)) ? -EFAULT : 0; case FBIOPUTCMAP: if (copy_from_user(&cmap, argp, sizeof(cmap))) return -EFAULT; return (fb_set_user_cmap(&cmap, info)); case FBIOGETCMAP: if (copy_from_user(&cmap, argp, sizeof(cmap))) return -EFAULT; return fb_cmap_to_user(&info->cmap, &cmap); case FBIOPAN_DISPLAY: if (copy_from_user(&var, argp, sizeof(var))) return -EFAULT; acquire_console_sem(); i = fb_pan_display(info, &var); release_console_sem(); if (i) return i; if (copy_to_user(argp, &var, sizeof(var))) return -EFAULT; return 0; case FBIO_CURSOR: return -EINVAL; case FBIOGET_CON2FBMAP: if (copy_from_user(&con2fb, argp, sizeof(con2fb))) return -EFAULT; if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) return -EINVAL; con2fb.framebuffer = -1; event.info = info; event.data = &con2fb; notifier_call_chain(&fb_notifier_list, FB_EVENT_GET_CONSOLE_MAP, &event); return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; case FBIOPUT_CON2FBMAP: if (copy_from_user(&con2fb, argp, sizeof(con2fb))) return - EFAULT; if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) return -EINVAL; if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) return -EINVAL; #ifdef CONFIG_KMOD if (!registered_fb[con2fb.framebuffer]) try_to_load(con2fb.framebuffer); #endif /* CONFIG_KMOD */ if (!registered_fb[con2fb.framebuffer]) return -EINVAL; event.info = info; event.data = &con2fb; return notifier_call_chain(&fb_notifier_list, FB_EVENT_SET_CONSOLE_MAP, &event); case FBIOBLANK: acquire_console_sem(); info->flags |= FBINFO_MISC_USEREVENT; i = fb_blank(info, arg); info->flags &= ~FBINFO_MISC_USEREVENT; release_console_sem(); return i; default: if (fb->fb_ioctl == NULL) return -EINVAL; return fb->fb_ioctl(inode, file, cmd, arg, info); } } #ifdef CONFIG_COMPAT static long fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { int fbidx = iminor(file->f_dentry->d_inode); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; long ret; if (fb->fb_compat_ioctl == NULL) return -ENOIOCTLCMD; lock_kernel(); ret = fb->fb_compat_ioctl(file, cmd, arg, info); unlock_kernel(); return ret; } #endif static int fb_mmap(struct file *file, struct vm_area_struct * vma) { int fbidx = iminor(file->f_dentry->d_inode); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; unsigned long off; #if !defined(__sparc__) || defined(__sparc_v9__) unsigned long start; u32 len; #endif if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL; off = vma->vm_pgoff << PAGE_SHIFT; if (!fb) return -ENODEV; if (fb->fb_mmap) { int res; lock_kernel(); res = fb->fb_mmap(info, file, vma); unlock_kernel(); return res; } #if defined(__sparc__) && !defined(__sparc_v9__) /* Should never get here, all fb drivers should have their own mmap routines */ return -EINVAL; #else /* !sparc32... */ lock_kernel(); /* frame buffer memory */ start = info->fix.smem_start; len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); if (off >= len) { /* memory mapped io */ off -= len; if (info->var.accel_flags) { unlock_kernel(); return -EINVAL; } start = info->fix.mmio_start; len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); } unlock_kernel(); start &= PAGE_MASK; if ((vma->vm_end - vma->vm_start + off) > len) return -EINVAL; off += start; vma->vm_pgoff = off >> PAGE_SHIFT; /* This is an IO map - tell maydump to skip this VMA */ vma->vm_flags |= VM_IO | VM_RESERVED; #if defined(__sparc_v9__) if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; #else #if defined(__mc68000__) #if defined(CONFIG_SUN3) pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; #elif defined(CONFIG_MMU) if (CPU_IS_020_OR_030) pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; if (CPU_IS_040_OR_060) { pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; /* Use no-cache mode, serialized */ pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; } #endif #elif defined(__powerpc__) vma->vm_page_prot = phys_mem_access_prot(file, off, vma->vm_end - vma->vm_start, vma->vm_page_prot); #elif defined(__alpha__) /* Caching is off in the I/O space quadrant by design. */ #elif defined(__i386__) || defined(__x86_64__) if (boot_cpu_data.x86 > 3) pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; #elif defined(__mips__) vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); #elif defined(__hppa__) pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); #elif defined(__ia64__) if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); else vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); #else #warning What do we have to do here?? #endif if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; #endif /* !__sparc_v9__ */ return 0; #endif /* !sparc32 */ } static int fb_open(struct inode *inode, struct file *file) { int fbidx = iminor(inode); struct fb_info *info; int res = 0; if (fbidx >= FB_MAX) return -ENODEV; #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->fbops->fb_open) { res = info->fbops->fb_open(info,1); if (res) module_put(info->fbops->owner); } return res; } static int fb_release(struct inode *inode, struct file *file) { int fbidx = iminor(inode); struct fb_info *info; lock_kernel(); info = registered_fb[fbidx]; if (info->fbops->fb_release) info->fbops->fb_release(info,1); module_put(info->fbops->owner); unlock_kernel(); return 0; } static struct file_operations fb_fops = { .owner = THIS_MODULE, .read = fb_read, .write = fb_write, .ioctl = fb_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = fb_compat_ioctl, #endif .mmap = fb_mmap, .open = fb_open, .release = fb_release, #ifdef HAVE_ARCH_FB_UNMAPPED_AREA .get_unmapped_area = get_fb_unmapped_area, #endif }; static struct class_simple *fb_class; /** * register_framebuffer - registers a frame buffer device * @fb_info: frame buffer info structure * * Registers a frame buffer device @fb_info. * * Returns negative errno on error, or zero for success. * */ int register_framebuffer(struct fb_info *fb_info) { int i; struct fb_event event; if (num_registered_fb == FB_MAX) return -ENXIO; num_registered_fb++; for (i = 0 ; i < FB_MAX; i++) if (!registered_fb[i]) break; fb_info->node = i; fb_info->class_device = class_simple_device_add(fb_class, MKDEV(FB_MAJOR, i), fb_info->device, "fb%d", i); if (IS_ERR(fb_info->class_device)) { /* Not fatal */ printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device)); fb_info->class_device = NULL; } else fb_init_class_device(fb_info); if (fb_info->pixmap.addr == NULL) { fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); if (fb_info->pixmap.addr) { fb_info->pixmap.size = FBPIXMAPSIZE; fb_info->pixmap.buf_align = 1; fb_info->pixmap.scan_align = 1; fb_info->pixmap.access_align = 4; fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; } } fb_info->pixmap.offset = 0; if (!fb_info->modelist.prev || !fb_info->modelist.next || list_empty(&fb_info->modelist)) { struct fb_videomode mode; INIT_LIST_HEAD(&fb_info->modelist); fb_var_to_videomode(&mode, &fb_info->var); fb_add_videomode(&mode, &fb_info->modelist); } registered_fb[i] = fb_info; devfs_mk_cdev(MKDEV(FB_MAJOR, i), S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); event.info = fb_info; notifier_call_chain(&fb_notifier_list, FB_EVENT_FB_REGISTERED, &event); return 0; } /** * unregister_framebuffer - releases a frame buffer device * @fb_info: frame buffer info structure * * Unregisters a frame buffer device @fb_info. * * Returns negative errno on error, or zero for success. * */ int unregister_framebuffer(struct fb_info *fb_info) { int i; i = fb_info->node; if (!registered_fb[i]) return -EINVAL; devfs_remove("fb/%d", i); if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) kfree(fb_info->pixmap.addr); fb_destroy_modelist(&fb_info->modelist); registered_fb[i]=NULL; num_registered_fb--; fb_cleanup_class_device(fb_info); class_simple_device_remove(MKDEV(FB_MAJOR, i)); return 0; } /** * fb_register_client - register a client notifier * @nb: notifier block to callback on events */ int fb_register_client(struct notifier_block *nb) { return notifier_chain_register(&fb_notifier_list, nb); } /** * fb_unregister_client - unregister a client notifier * @nb: notifier block to callback on events */ int fb_unregister_client(struct notifier_block *nb) { return notifier_chain_unregister(&fb_notifier_list, nb); } /** * fb_set_suspend - low level driver signals suspend * @info: framebuffer affected * @state: 0 = resuming, !=0 = suspending * * This is meant to be used by low level drivers to * signal suspend/resume to the core & clients. * It must be called with the console semaphore held */ void fb_set_suspend(struct fb_info *info, int state) { struct fb_event event; event.info = info; if (state) { notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event); info->state = FBINFO_STATE_SUSPENDED; } else { info->state = FBINFO_STATE_RUNNING; notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event); } } /** * fbmem_init - init frame buffer subsystem * * Initialize the frame buffer subsystem. * * NOTE: This function is _only_ to be called by drivers/char/mem.c. * */ static int __init fbmem_init(void) { create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); devfs_mk_dir("fb"); if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) printk("unable to get major %d for fb devs\n", FB_MAJOR); fb_class = class_simple_create(THIS_MODULE, "graphics"); if (IS_ERR(fb_class)) { printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); fb_class = NULL; } return 0; } #ifdef MODULE module_init(fbmem_init); static void __exit fbmem_exit(void) { class_simple_destroy(fb_class); } module_exit(fbmem_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Framebuffer base"); #else subsys_initcall(fbmem_init); #endif int fb_new_modelist(struct fb_info *info) { struct fb_event event; struct fb_var_screeninfo var = info->var; struct list_head *pos, *n; struct fb_modelist *modelist; struct fb_videomode *m, mode; int err = 1; list_for_each_safe(pos, n, &info->modelist) { modelist = list_entry(pos, struct fb_modelist, list); m = &modelist->mode; fb_videomode_to_var(&var, m); var.activate = FB_ACTIVATE_TEST; err = fb_set_var(info, &var); fb_var_to_videomode(&mode, &var); if (err || !fb_mode_is_equal(m, &mode)) { list_del(pos); kfree(pos); } } err = 1; if (!list_empty(&info->modelist)) { event.info = info; err = notifier_call_chain(&fb_notifier_list, FB_EVENT_NEW_MODELIST, &event); } return err; } static char *video_options[FB_MAX]; static int ofonly; /** * fb_get_options - get kernel boot parameters * @name: framebuffer name as it would appear in * the boot parameter line * (video=:) * @option: the option will be stored here * * NOTE: Needed to maintain backwards compatibility */ int fb_get_options(char *name, char **option) { char *opt, *options = NULL; int opt_len, retval = 0; int name_len = strlen(name), i; if (name_len && ofonly && strncmp(name, "offb", 4)) retval = 1; if (name_len && !retval) { for (i = 0; i < FB_MAX; i++) { if (video_options[i] == NULL) continue; opt_len = strlen(video_options[i]); if (!opt_len) continue; opt = video_options[i]; if (!strncmp(name, opt, name_len) && opt[name_len] == ':') options = opt + name_len + 1; } } if (options && !strncmp(options, "off", 3)) retval = 1; if (option) *option = options; return retval; } extern const char *global_mode_option; /** * video_setup - process command line options * @options: string of options * * Process command line options for frame buffer subsystem. * * NOTE: This function is a __setup and __init function. * It only stores the options. Drivers have to call * fb_get_options() as necessary. * * Returns zero. * */ int __init video_setup(char *options) { int i, global = 0; if (!options || !*options) global = 1; if (!global && !strncmp(options, "ofonly", 6)) { ofonly = 1; global = 1; } if (!global && !strstr(options, "fb:")) { global_mode_option = options; global = 1; } if (!global) { for (i = 0; i < FB_MAX; i++) { if (video_options[i] == NULL) { video_options[i] = options; break; } } } return 0; } __setup("video=", video_setup); /* * Visible symbols for modules */ 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); EXPORT_SYMBOL(fb_pan_display); EXPORT_SYMBOL(fb_get_buffer_offset); EXPORT_SYMBOL(fb_iomove_buf_unaligned); EXPORT_SYMBOL(fb_iomove_buf_aligned); EXPORT_SYMBOL(fb_sysmove_buf_unaligned); EXPORT_SYMBOL(fb_sysmove_buf_aligned); EXPORT_SYMBOL(fb_set_suspend); EXPORT_SYMBOL(fb_register_client); EXPORT_SYMBOL(fb_unregister_client); EXPORT_SYMBOL(fb_get_options); EXPORT_SYMBOL(fb_new_modelist); MODULE_LICENSE("GPL");