| /* |
| * linux/drivers/video/fbmem.c |
| * |
| * Copyright (C) 1994 Martin Schaller |
| * |
| * 2001 - Documented with DocBook |
| * - Brad Douglas <brad@neruo.com> |
| * |
| * 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 <linux/module.h> |
| |
| #include <linux/compat.h> |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/major.h> |
| #include <linux/slab.h> |
| #include <linux/mm.h> |
| #include <linux/mman.h> |
| #include <linux/vt.h> |
| #include <linux/init.h> |
| #include <linux/linux_logo.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/console.h> |
| #include <linux/kmod.h> |
| #include <linux/err.h> |
| #include <linux/device.h> |
| #include <linux/efi.h> |
| #include <linux/fb.h> |
| |
| #include <asm/fb.h> |
| |
| |
| /* |
| * Frame buffer device initialization and setup routines |
| */ |
| |
| #define FBPIXMAPSIZE (1024 * 8) |
| |
| static DEFINE_MUTEX(registration_lock); |
| struct fb_info *registered_fb[FB_MAX] __read_mostly; |
| int num_registered_fb __read_mostly; |
| |
| static struct fb_info *get_fb_info(unsigned int idx) |
| { |
| struct fb_info *fb_info; |
| |
| if (idx >= FB_MAX) |
| return ERR_PTR(-ENODEV); |
| |
| mutex_lock(®istration_lock); |
| fb_info = registered_fb[idx]; |
| if (fb_info) |
| atomic_inc(&fb_info->count); |
| mutex_unlock(®istration_lock); |
| |
| return fb_info; |
| } |
| |
| static void put_fb_info(struct fb_info *fb_info) |
| { |
| if (!atomic_dec_and_test(&fb_info->count)) |
| return; |
| if (fb_info->fbops->fb_destroy) |
| fb_info->fbops->fb_destroy(fb_info); |
| } |
| |
| int lock_fb_info(struct fb_info *info) |
| { |
| mutex_lock(&info->lock); |
| if (!info->fbops) { |
| mutex_unlock(&info->lock); |
| return 0; |
| } |
| return 1; |
| } |
| EXPORT_SYMBOL(lock_fb_info); |
| |
| /* |
| * Helpers |
| */ |
| |
| int fb_get_color_depth(struct fb_var_screeninfo *var, |
| struct fb_fix_screeninfo *fix) |
| { |
| int depth = 0; |
| |
| if (fix->visual == FB_VISUAL_MONO01 || |
| fix->visual == FB_VISUAL_MONO10) |
| depth = 1; |
| else { |
| if (var->green.length == var->blue.length && |
| var->green.length == var->red.length && |
| var->green.offset == var->blue.offset && |
| var->green.offset == var->red.offset) |
| depth = var->green.length; |
| else |
| depth = var->green.length + var->red.length + |
| var->blue.length; |
| } |
| |
| return depth; |
| } |
| EXPORT_SYMBOL(fb_get_color_depth); |
| |
| /* |
| * Data padding functions. |
| */ |
| void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
| { |
| __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
| } |
| EXPORT_SYMBOL(fb_pad_aligned_buffer); |
| |
| void fb_pad_unaligned_buffer(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; |
| } |
| } |
| EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
| |
| /* |
| * 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 |
| |
| 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) |
| { |
| static const unsigned char mask[] = { 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 < 32 + 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; |
| const u8 *src = logo->data; |
| u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
| u8 fg = 1, d; |
| |
| switch (fb_get_color_depth(&info->var, &info->fix)) { |
| case 1: |
| fg = 1; |
| break; |
| case 2: |
| fg = 3; |
| break; |
| default: |
| fg = 7; |
| break; |
| } |
| |
| if (info->fix.visual == FB_VISUAL_MONO01 || |
| info->fix.visual == FB_VISUAL_MONO10) |
| fg = ~((u8) (0xfff << info->var.green.length)); |
| |
| 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 __read_mostly; |
| |
| static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
| { |
| u32 size = width * height, i; |
| |
| out += size - 1; |
| |
| for (i = size; i--; ) |
| *out-- = *in++; |
| } |
| |
| static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) |
| { |
| int i, j, h = height - 1; |
| |
| for (i = 0; i < height; i++) |
| for (j = 0; j < width; j++) |
| out[height * j + h - i] = *in++; |
| } |
| |
| static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) |
| { |
| int i, j, w = width - 1; |
| |
| for (i = 0; i < height; i++) |
| for (j = 0; j < width; j++) |
| out[height * (w - j) + i] = *in++; |
| } |
| |
| static void fb_rotate_logo(struct fb_info *info, u8 *dst, |
| struct fb_image *image, int rotate) |
| { |
| u32 tmp; |
| |
| if (rotate == FB_ROTATE_UD) { |
| fb_rotate_logo_ud(image->data, dst, image->width, |
| image->height); |
| image->dx = info->var.xres - image->width - image->dx; |
| image->dy = info->var.yres - image->height - image->dy; |
| } else if (rotate == FB_ROTATE_CW) { |
| fb_rotate_logo_cw(image->data, dst, image->width, |
| image->height); |
| tmp = image->width; |
| image->width = image->height; |
| image->height = tmp; |
| tmp = image->dy; |
| image->dy = image->dx; |
| image->dx = info->var.xres - image->width - tmp; |
| } else if (rotate == FB_ROTATE_CCW) { |
| fb_rotate_logo_ccw(image->data, dst, image->width, |
| image->height); |
| tmp = image->width; |
| image->width = image->height; |
| image->height = tmp; |
| tmp = image->dx; |
| image->dx = image->dy; |
| image->dy = info->var.yres - image->height - tmp; |
| } |
| |
| image->data = dst; |
| } |
| |
| static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, |
| int rotate, unsigned int num) |
| { |
| unsigned int x; |
| |
| if (rotate == FB_ROTATE_UR) { |
| for (x = 0; |
| x < num && image->dx + image->width <= info->var.xres; |
| x++) { |
| info->fbops->fb_imageblit(info, image); |
| image->dx += image->width + 8; |
| } |
| } else if (rotate == FB_ROTATE_UD) { |
| for (x = 0; x < num && image->dx >= 0; x++) { |
| info->fbops->fb_imageblit(info, image); |
| image->dx -= image->width + 8; |
| } |
| } else if (rotate == FB_ROTATE_CW) { |
| for (x = 0; |
| x < num && image->dy + image->height <= info->var.yres; |
| x++) { |
| info->fbops->fb_imageblit(info, image); |
| image->dy += image->height + 8; |
| } |
| } else if (rotate == FB_ROTATE_CCW) { |
| for (x = 0; x < num && image->dy >= 0; x++) { |
| info->fbops->fb_imageblit(info, image); |
| image->dy -= image->height + 8; |
| } |
| } |
| } |
| |
| static int fb_show_logo_line(struct fb_info *info, int rotate, |
| const struct linux_logo *logo, int y, |
| unsigned int n) |
| { |
| u32 *palette = NULL, *saved_pseudo_palette = NULL; |
| unsigned char *logo_new = NULL, *logo_rotate = NULL; |
| struct fb_image image; |
| |
| /* Return if the frame buffer is not mapped or suspended */ |
| if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
| info->flags & FBINFO_MODULE) |
| return 0; |
| |
| image.depth = 8; |
| image.data = logo->data; |
| |
| if (fb_logo.needs_cmapreset) |
| fb_set_logocmap(info, 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, logo, palette); |
| else |
| fb_set_logo_directpalette(info, logo, palette); |
| |
| saved_pseudo_palette = info->pseudo_palette; |
| info->pseudo_palette = palette; |
| } |
| |
| if (fb_logo.depth <= 4) { |
| logo_new = kmalloc(logo->width * 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, logo, logo_new, fb_logo.depth); |
| } |
| |
| image.dx = 0; |
| image.dy = y; |
| image.width = logo->width; |
| image.height = logo->height; |
| |
| if (rotate) { |
| logo_rotate = kmalloc(logo->width * |
| logo->height, GFP_KERNEL); |
| if (logo_rotate) |
| fb_rotate_logo(info, logo_rotate, &image, rotate); |
| } |
| |
| fb_do_show_logo(info, &image, rotate, n); |
| |
| kfree(palette); |
| if (saved_pseudo_palette != NULL) |
| info->pseudo_palette = saved_pseudo_palette; |
| kfree(logo_new); |
| kfree(logo_rotate); |
| return logo->height; |
| } |
| |
| |
| #ifdef CONFIG_FB_LOGO_EXTRA |
| |
| #define FB_LOGO_EX_NUM_MAX 10 |
| static struct logo_data_extra { |
| const struct linux_logo *logo; |
| unsigned int n; |
| } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; |
| static unsigned int fb_logo_ex_num; |
| |
| void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) |
| { |
| if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) |
| return; |
| |
| fb_logo_ex[fb_logo_ex_num].logo = logo; |
| fb_logo_ex[fb_logo_ex_num].n = n; |
| fb_logo_ex_num++; |
| } |
| |
| static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, |
| unsigned int yres) |
| { |
| unsigned int i; |
| |
| /* FIXME: logo_ex supports only truecolor fb. */ |
| if (info->fix.visual != FB_VISUAL_TRUECOLOR) |
| fb_logo_ex_num = 0; |
| |
| for (i = 0; i < fb_logo_ex_num; i++) { |
| if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
| fb_logo_ex[i].logo = NULL; |
| continue; |
| } |
| height += fb_logo_ex[i].logo->height; |
| if (height > yres) { |
| height -= fb_logo_ex[i].logo->height; |
| fb_logo_ex_num = i; |
| break; |
| } |
| } |
| return height; |
| } |
| |
| static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < fb_logo_ex_num; i++) |
| y += fb_show_logo_line(info, rotate, |
| fb_logo_ex[i].logo, y, fb_logo_ex[i].n); |
| |
| return y; |
| } |
| |
| #else /* !CONFIG_FB_LOGO_EXTRA */ |
| |
| static inline int fb_prepare_extra_logos(struct fb_info *info, |
| unsigned int height, |
| unsigned int yres) |
| { |
| return height; |
| } |
| |
| static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
| { |
| return y; |
| } |
| |
| #endif /* CONFIG_FB_LOGO_EXTRA */ |
| |
| |
| int fb_prepare_logo(struct fb_info *info, int rotate) |
| { |
| int depth = fb_get_color_depth(&info->var, &info->fix); |
| unsigned int yres; |
| |
| memset(&fb_logo, 0, sizeof(struct logo_data)); |
| |
| if (info->flags & FBINFO_MISC_TILEBLITTING || |
| info->flags & FBINFO_MODULE) |
| 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 (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
| /* assume console colormap */ |
| depth = 4; |
| } |
| |
| /* Return if no suitable logo was found */ |
| fb_logo.logo = fb_find_logo(depth); |
| |
| if (!fb_logo.logo) { |
| return 0; |
| } |
| |
| if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
| yres = info->var.yres; |
| else |
| yres = info->var.xres; |
| |
| if (fb_logo.logo->height > 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; |
| |
| |
| if (fb_logo.depth > 4 && depth > 4) { |
| 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 fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
| } |
| |
| int fb_show_logo(struct fb_info *info, int rotate) |
| { |
| int y; |
| |
| y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, |
| num_online_cpus()); |
| y = fb_show_extra_logos(info, y, rotate); |
| |
| return y; |
| } |
| #else |
| 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 void *fb_seq_start(struct seq_file *m, loff_t *pos) |
| { |
| mutex_lock(®istration_lock); |
| 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) |
| { |
| mutex_unlock(®istration_lock); |
| } |
| |
| 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, |
| }; |
| |
| /* |
| * We hold a reference to the fb_info in file->private_data, |
| * but if the current registered fb has changed, we don't |
| * actually want to use it. |
| * |
| * So look up the fb_info using the inode minor number, |
| * and just verify it against the reference we have. |
| */ |
| static struct fb_info *file_fb_info(struct file *file) |
| { |
| struct inode *inode = file->f_path.dentry->d_inode; |
| int fbidx = iminor(inode); |
| struct fb_info *info = registered_fb[fbidx]; |
| |
| if (info != file->private_data) |
| info = NULL; |
| return info; |
| } |
| |
| static ssize_t |
| fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
| { |
| unsigned long p = *ppos; |
| struct fb_info *info = file_fb_info(file); |
| u8 *buffer, *dst; |
| u8 __iomem *src; |
| int c, 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(info, 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; |
| |
| buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
| GFP_KERNEL); |
| if (!buffer) |
| return -ENOMEM; |
| |
| src = (u8 __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; |
| fb_memcpy_fromfb(dst, src, c); |
| dst += c; |
| src += c; |
| |
| 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 fb_info *info = file_fb_info(file); |
| u8 *buffer, *src; |
| u8 __iomem *dst; |
| int c, 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_write) |
| return info->fbops->fb_write(info, buf, count, ppos); |
| |
| total_size = info->screen_size; |
| |
| if (total_size == 0) |
| total_size = info->fix.smem_len; |
| |
| if (p > total_size) |
| return -EFBIG; |
| |
| if (count > total_size) { |
| err = -EFBIG; |
| count = total_size; |
| } |
| |
| if (count + p > total_size) { |
| if (!err) |
| err = -ENOSPC; |
| |
| count = total_size - p; |
| } |
| |
| buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
| GFP_KERNEL); |
| if (!buffer) |
| return -ENOMEM; |
| |
| dst = (u8 __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; |
| } |
| |
| fb_memcpy_tofb(dst, src, c); |
| dst += c; |
| src += c; |
| *ppos += c; |
| buf += c; |
| cnt += c; |
| count -= c; |
| } |
| |
| kfree(buffer); |
| |
| return (cnt) ? cnt : err; |
| } |
| |
| int |
| fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) |
| { |
| struct fb_fix_screeninfo *fix = &info->fix; |
| unsigned int yres = info->var.yres; |
| int err = 0; |
| |
| if (var->yoffset > 0) { |
| if (var->vmode & FB_VMODE_YWRAP) { |
| if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) |
| err = -EINVAL; |
| else |
| yres = 0; |
| } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) |
| err = -EINVAL; |
| } |
| |
| if (var->xoffset > 0 && (!fix->xpanstep || |
| (var->xoffset % fix->xpanstep))) |
| err = -EINVAL; |
| |
| if (err || !info->fbops->fb_pan_display || |
| var->yoffset > info->var.yres_virtual - yres || |
| var->xoffset > info->var.xres_virtual - info->var.xres) |
| 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; |
| } |
| |
| static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
| u32 activate) |
| { |
| struct fb_event event; |
| struct fb_blit_caps caps, fbcaps; |
| int err = 0; |
| |
| memset(&caps, 0, sizeof(caps)); |
| memset(&fbcaps, 0, sizeof(fbcaps)); |
| caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; |
| event.info = info; |
| event.data = ∩︀ |
| fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); |
| info->fbops->fb_get_caps(info, &fbcaps, var); |
| |
| if (((fbcaps.x ^ caps.x) & caps.x) || |
| ((fbcaps.y ^ caps.y) & caps.y) || |
| (fbcaps.len < caps.len)) |
| err = -EINVAL; |
| |
| return err; |
| } |
| |
| int |
| fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) |
| { |
| int flags = info->flags; |
| int ret = 0; |
| |
| if (var->activate & FB_ACTIVATE_INV_MODE) { |
| struct fb_videomode mode1, mode2; |
| |
| 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 = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
| } |
| |
| if (!ret) |
| fb_delete_videomode(&mode1, &info->modelist); |
| |
| |
| ret = (ret) ? -EINVAL : 0; |
| goto done; |
| } |
| |
| if ((var->activate & FB_ACTIVATE_FORCE) || |
| memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { |
| u32 activate = var->activate; |
| |
| if (!info->fbops->fb_check_var) { |
| *var = info->var; |
| goto done; |
| } |
| |
| ret = info->fbops->fb_check_var(var, info); |
| |
| if (ret) |
| goto done; |
| |
| if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { |
| struct fb_var_screeninfo old_var; |
| struct fb_videomode mode; |
| |
| if (info->fbops->fb_get_caps) { |
| ret = fb_check_caps(info, var, activate); |
| |
| if (ret) |
| goto done; |
| } |
| |
| old_var = info->var; |
| info->var = *var; |
| |
| if (info->fbops->fb_set_par) { |
| ret = info->fbops->fb_set_par(info); |
| |
| if (ret) { |
| info->var = old_var; |
| printk(KERN_WARNING "detected " |
| "fb_set_par error, " |
| "error code: %d\n", ret); |
| goto done; |
| } |
| } |
| |
| 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)) |
| ret = fb_add_videomode(&mode, &info->modelist); |
| |
| if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
| struct fb_event event; |
| int evnt = (activate & FB_ACTIVATE_ALL) ? |
| FB_EVENT_MODE_CHANGE_ALL : |
| FB_EVENT_MODE_CHANGE; |
| |
| info->flags &= ~FBINFO_MISC_USEREVENT; |
| event.info = info; |
| event.data = &mode; |
| fb_notifier_call_chain(evnt, &event); |
| } |
| } |
| } |
| |
| done: |
| return ret; |
| } |
| |
| 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 = ␣ |
| fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
| } |
| |
| return ret; |
| } |
| |
| static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct fb_ops *fb; |
| struct fb_var_screeninfo var; |
| struct fb_fix_screeninfo fix; |
| struct fb_con2fbmap con2fb; |
| struct fb_cmap cmap_from; |
| struct fb_cmap_user cmap; |
| struct fb_event event; |
| void __user *argp = (void __user *)arg; |
| long ret = 0; |
| |
| switch (cmd) { |
| case FBIOGET_VSCREENINFO: |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| var = info->var; |
| unlock_fb_info(info); |
| |
| ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; |
| break; |
| case FBIOPUT_VSCREENINFO: |
| if (copy_from_user(&var, argp, sizeof(var))) |
| return -EFAULT; |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| console_lock(); |
| info->flags |= FBINFO_MISC_USEREVENT; |
| ret = fb_set_var(info, &var); |
| info->flags &= ~FBINFO_MISC_USEREVENT; |
| console_unlock(); |
| unlock_fb_info(info); |
| if (!ret && copy_to_user(argp, &var, sizeof(var))) |
| ret = -EFAULT; |
| break; |
| case FBIOGET_FSCREENINFO: |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| fix = info->fix; |
| unlock_fb_info(info); |
| |
| ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; |
| break; |
| case FBIOPUTCMAP: |
| if (copy_from_user(&cmap, argp, sizeof(cmap))) |
| return -EFAULT; |
| ret = fb_set_user_cmap(&cmap, info); |
| break; |
| case FBIOGETCMAP: |
| if (copy_from_user(&cmap, argp, sizeof(cmap))) |
| return -EFAULT; |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| cmap_from = info->cmap; |
| unlock_fb_info(info); |
| ret = fb_cmap_to_user(&cmap_from, &cmap); |
| break; |
| case FBIOPAN_DISPLAY: |
| if (copy_from_user(&var, argp, sizeof(var))) |
| return -EFAULT; |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| console_lock(); |
| ret = fb_pan_display(info, &var); |
| console_unlock(); |
| unlock_fb_info(info); |
| if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
| return -EFAULT; |
| break; |
| case FBIO_CURSOR: |
| ret = -EINVAL; |
| break; |
| 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.data = &con2fb; |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| event.info = info; |
| fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
| unlock_fb_info(info); |
| ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
| break; |
| case FBIOPUT_CON2FBMAP: |
| if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
| return -EFAULT; |
| if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
| return -EINVAL; |
| if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) |
| return -EINVAL; |
| if (!registered_fb[con2fb.framebuffer]) |
| request_module("fb%d", con2fb.framebuffer); |
| if (!registered_fb[con2fb.framebuffer]) { |
| ret = -EINVAL; |
| break; |
| } |
| event.data = &con2fb; |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| event.info = info; |
| ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
| unlock_fb_info(info); |
| break; |
| case FBIOBLANK: |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| console_lock(); |
| info->flags |= FBINFO_MISC_USEREVENT; |
| ret = fb_blank(info, arg); |
| info->flags &= ~FBINFO_MISC_USEREVENT; |
| console_unlock(); |
| unlock_fb_info(info); |
| break; |
| default: |
| fb = info->fbops; |
| if (fb->fb_ioctl) |
| ret = fb->fb_ioctl(info, cmd, arg); |
| else |
| ret = -ENOTTY; |
| } |
| return ret; |
| } |
| |
| static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| struct fb_info *info = file_fb_info(file); |
| |
| if (!info) |
| return -ENODEV; |
| return do_fb_ioctl(info, cmd, arg); |
| } |
| |
| #ifdef CONFIG_COMPAT |
| struct fb_fix_screeninfo32 { |
| char id[16]; |
| compat_caddr_t smem_start; |
| u32 smem_len; |
| u32 type; |
| u32 type_aux; |
| u32 visual; |
| u16 xpanstep; |
| u16 ypanstep; |
| u16 ywrapstep; |
| u32 line_length; |
| compat_caddr_t mmio_start; |
| u32 mmio_len; |
| u32 accel; |
| u16 reserved[3]; |
| }; |
| |
| struct fb_cmap32 { |
| u32 start; |
| u32 len; |
| compat_caddr_t red; |
| compat_caddr_t green; |
| compat_caddr_t blue; |
| compat_caddr_t transp; |
| }; |
| |
| static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct fb_cmap_user __user *cmap; |
| struct fb_cmap32 __user *cmap32; |
| __u32 data; |
| int err; |
| |
| cmap = compat_alloc_user_space(sizeof(*cmap)); |
| cmap32 = compat_ptr(arg); |
| |
| if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) |
| return -EFAULT; |
| |
| if (get_user(data, &cmap32->red) || |
| put_user(compat_ptr(data), &cmap->red) || |
| get_user(data, &cmap32->green) || |
| put_user(compat_ptr(data), &cmap->green) || |
| get_user(data, &cmap32->blue) || |
| put_user(compat_ptr(data), &cmap->blue) || |
| get_user(data, &cmap32->transp) || |
| put_user(compat_ptr(data), &cmap->transp)) |
| return -EFAULT; |
| |
| err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
| |
| if (!err) { |
| if (copy_in_user(&cmap32->start, |
| &cmap->start, |
| 2 * sizeof(__u32))) |
| err = -EFAULT; |
| } |
| return err; |
| } |
| |
| static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, |
| struct fb_fix_screeninfo32 __user *fix32) |
| { |
| __u32 data; |
| int err; |
| |
| err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); |
| |
| data = (__u32) (unsigned long) fix->smem_start; |
| err |= put_user(data, &fix32->smem_start); |
| |
| err |= put_user(fix->smem_len, &fix32->smem_len); |
| err |= put_user(fix->type, &fix32->type); |
| err |= put_user(fix->type_aux, &fix32->type_aux); |
| err |= put_user(fix->visual, &fix32->visual); |
| err |= put_user(fix->xpanstep, &fix32->xpanstep); |
| err |= put_user(fix->ypanstep, &fix32->ypanstep); |
| err |= put_user(fix->ywrapstep, &fix32->ywrapstep); |
| err |= put_user(fix->line_length, &fix32->line_length); |
| |
| data = (__u32) (unsigned long) fix->mmio_start; |
| err |= put_user(data, &fix32->mmio_start); |
| |
| err |= put_user(fix->mmio_len, &fix32->mmio_len); |
| err |= put_user(fix->accel, &fix32->accel); |
| err |= copy_to_user(fix32->reserved, fix->reserved, |
| sizeof(fix->reserved)); |
| |
| return err; |
| } |
| |
| static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| mm_segment_t old_fs; |
| struct fb_fix_screeninfo fix; |
| struct fb_fix_screeninfo32 __user *fix32; |
| int err; |
| |
| fix32 = compat_ptr(arg); |
| |
| old_fs = get_fs(); |
| set_fs(KERNEL_DS); |
| err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
| set_fs(old_fs); |
| |
| if (!err) |
| err = do_fscreeninfo_to_user(&fix, fix32); |
| |
| return err; |
| } |
| |
| static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct fb_info *info = file_fb_info(file); |
| struct fb_ops *fb; |
| long ret = -ENOIOCTLCMD; |
| |
| if (!info) |
| return -ENODEV; |
| fb = info->fbops; |
| switch(cmd) { |
| case FBIOGET_VSCREENINFO: |
| case FBIOPUT_VSCREENINFO: |
| case FBIOPAN_DISPLAY: |
| case FBIOGET_CON2FBMAP: |
| case FBIOPUT_CON2FBMAP: |
| arg = (unsigned long) compat_ptr(arg); |
| case FBIOBLANK: |
| ret = do_fb_ioctl(info, cmd, arg); |
| break; |
| |
| case FBIOGET_FSCREENINFO: |
| ret = fb_get_fscreeninfo(info, cmd, arg); |
| break; |
| |
| case FBIOGETCMAP: |
| case FBIOPUTCMAP: |
| ret = fb_getput_cmap(info, cmd, arg); |
| break; |
| |
| default: |
| if (fb->fb_compat_ioctl) |
| ret = fb->fb_compat_ioctl(info, cmd, arg); |
| break; |
| } |
| return ret; |
| } |
| #endif |
| |
| static int |
| fb_mmap(struct file *file, struct vm_area_struct * vma) |
| { |
| struct fb_info *info = file_fb_info(file); |
| struct fb_ops *fb; |
| unsigned long off; |
| unsigned long start; |
| u32 len; |
| |
| if (!info) |
| return -ENODEV; |
| if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) |
| return -EINVAL; |
| off = vma->vm_pgoff << PAGE_SHIFT; |
| fb = info->fbops; |
| if (!fb) |
| return -ENODEV; |
| mutex_lock(&info->mm_lock); |
| if (fb->fb_mmap) { |
| int res; |
| res = fb->fb_mmap(info, vma); |
| mutex_unlock(&info->mm_lock); |
| return res; |
| } |
| |
| /* 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) { |
| mutex_unlock(&info->mm_lock); |
| return -EINVAL; |
| } |
| start = info->fix.mmio_start; |
| len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); |
| } |
| mutex_unlock(&info->mm_lock); |
| 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; |
| vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
| fb_pgprotect(file, vma, off); |
| if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
| vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| return -EAGAIN; |
| return 0; |
| } |
| |
| static int |
| fb_open(struct inode *inode, struct file *file) |
| __acquires(&info->lock) |
| __releases(&info->lock) |
| { |
| int fbidx = iminor(inode); |
| struct fb_info *info; |
| int res = 0; |
| |
| info = get_fb_info(fbidx); |
| if (!info) { |
| request_module("fb%d", fbidx); |
| info = get_fb_info(fbidx); |
| if (!info) |
| return -ENODEV; |
| } |
| if (IS_ERR(info)) |
| return PTR_ERR(info); |
| |
| mutex_lock(&info->lock); |
| 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); |
| } |
| #ifdef CONFIG_FB_DEFERRED_IO |
| if (info->fbdefio) |
| fb_deferred_io_open(info, inode, file); |
| #endif |
| out: |
| mutex_unlock(&info->lock); |
| if (res) |
| put_fb_info(info); |
| return res; |
| } |
| |
| static int |
| fb_release(struct inode *inode, struct file *file) |
| __acquires(&info->lock) |
| __releases(&info->lock) |
| { |
| struct fb_info * const info = file->private_data; |
| |
| mutex_lock(&info->lock); |
| if (info->fbops->fb_release) |
| info->fbops->fb_release(info,1); |
| module_put(info->fbops->owner); |
| mutex_unlock(&info->lock); |
| put_fb_info(info); |
| return 0; |
| } |
| |
| static const struct file_operations fb_fops = { |
| .owner = THIS_MODULE, |
| .read = fb_read, |
| .write = fb_write, |
| .unlocked_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 |
| #ifdef CONFIG_FB_DEFERRED_IO |
| .fsync = fb_deferred_io_fsync, |
| #endif |
| .llseek = default_llseek, |
| }; |
| |
| 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; |
| } |
| |
| static bool apertures_overlap(struct aperture *gen, struct aperture *hw) |
| { |
| /* is the generic aperture base the same as the HW one */ |
| if (gen->base == hw->base) |
| return true; |
| /* is the generic aperture base inside the hw base->hw base+size */ |
| if (gen->base > hw->base && gen->base < hw->base + hw->size) |
| return true; |
| return false; |
| } |
| |
| static bool fb_do_apertures_overlap(struct apertures_struct *gena, |
| struct apertures_struct *hwa) |
| { |
| int i, j; |
| if (!hwa || !gena) |
| return false; |
| |
| for (i = 0; i < hwa->count; ++i) { |
| struct aperture *h = &hwa->ranges[i]; |
| for (j = 0; j < gena->count; ++j) { |
| struct aperture *g = &gena->ranges[j]; |
| printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", |
| (unsigned long long)g->base, |
| (unsigned long long)g->size, |
| (unsigned long long)h->base, |
| (unsigned long long)h->size); |
| if (apertures_overlap(g, h)) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| static int do_unregister_framebuffer(struct fb_info *fb_info); |
| |
| #define VGA_FB_PHYS 0xA0000 |
| static void do_remove_conflicting_framebuffers(struct apertures_struct *a, |
| const char *name, bool primary) |
| { |
| int i; |
| |
| /* check all firmware fbs and kick off if the base addr overlaps */ |
| for (i = 0 ; i < FB_MAX; i++) { |
| struct apertures_struct *gen_aper; |
| if (!registered_fb[i]) |
| continue; |
| |
| if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) |
| continue; |
| |
| gen_aper = registered_fb[i]->apertures; |
| if (fb_do_apertures_overlap(gen_aper, a) || |
| (primary && gen_aper && gen_aper->count && |
| gen_aper->ranges[0].base == VGA_FB_PHYS)) { |
| |
| printk(KERN_INFO "fb: conflicting fb hw usage " |
| "%s vs %s - removing generic driver\n", |
| name, registered_fb[i]->fix.id); |
| do_unregister_framebuffer(registered_fb[i]); |
| } |
| } |
| } |
| |
| static int do_register_framebuffer(struct fb_info *fb_info) |
| { |
| int i; |
| struct fb_event event; |
| struct fb_videomode mode; |
| |
| if (fb_check_foreignness(fb_info)) |
| return -ENOSYS; |
| |
| do_remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id, |
| fb_is_primary_device(fb_info)); |
| |
| 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; |
| atomic_set(&fb_info->count, 1); |
| mutex_init(&fb_info->lock); |
| mutex_init(&fb_info->mm_lock); |
| |
| fb_info->dev = device_create(fb_class, fb_info->device, |
| MKDEV(FB_MAJOR, i), NULL, "fb%d", i); |
| if (IS_ERR(fb_info->dev)) { |
| /* Not fatal */ |
| printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
| fb_info->dev = NULL; |
| } else |
| fb_init_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 = 32; |
| fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
| } |
| } |
| fb_info->pixmap.offset = 0; |
| |
| if (!fb_info->pixmap.blit_x) |
| fb_info->pixmap.blit_x = ~(u32)0; |
| |
| if (!fb_info->pixmap.blit_y) |
| fb_info->pixmap.blit_y = ~(u32)0; |
| |
| if (!fb_info->modelist.prev || !fb_info->modelist.next) |
| 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; |
| |
| event.info = fb_info; |
| if (!lock_fb_info(fb_info)) |
| return -ENODEV; |
| fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
| unlock_fb_info(fb_info); |
| return 0; |
| } |
| |
| static int do_unregister_framebuffer(struct fb_info *fb_info) |
| { |
| struct fb_event event; |
| int i, ret = 0; |
| |
| i = fb_info->node; |
| if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) |
| return -EINVAL; |
| |
| if (!lock_fb_info(fb_info)) |
| return -ENODEV; |
| event.info = fb_info; |
| ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); |
| unlock_fb_info(fb_info); |
| |
| if (ret) |
| return -EINVAL; |
| |
| 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_device(fb_info); |
| device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
| event.info = fb_info; |
| fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
| |
| /* this may free fb info */ |
| put_fb_info(fb_info); |
| return 0; |
| } |
| |
| void remove_conflicting_framebuffers(struct apertures_struct *a, |
| const char *name, bool primary) |
| { |
| mutex_lock(®istration_lock); |
| do_remove_conflicting_framebuffers(a, name, primary); |
| mutex_unlock(®istration_lock); |
| } |
| EXPORT_SYMBOL(remove_conflicting_framebuffers); |
| |
| /** |
| * 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 ret; |
| |
| mutex_lock(®istration_lock); |
| ret = do_register_framebuffer(fb_info); |
| mutex_unlock(®istration_lock); |
| |
| return ret; |
| } |
| |
| /** |
| * 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. |
| * |
| * This function will also notify the framebuffer console |
| * to release the driver. |
| * |
| * This is meant to be called within a driver's module_exit() |
| * function. If this is called outside module_exit(), ensure |
| * that the driver implements fb_open() and fb_release() to |
| * check that no processes are using the device. |
| */ |
| int |
| unregister_framebuffer(struct fb_info *fb_info) |
| { |
| int ret; |
| |
| mutex_lock(®istration_lock); |
| ret = do_unregister_framebuffer(fb_info); |
| mutex_unlock(®istration_lock); |
| |
| return ret; |
| } |
| |
| /** |
| * 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) { |
| fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
| info->state = FBINFO_STATE_SUSPENDED; |
| } else { |
| info->state = FBINFO_STATE_RUNNING; |
| fb_notifier_call_chain(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) |
| { |
| 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); |
| |
| fb_class = class_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) |
| { |
| remove_proc_entry("fb", NULL); |
| class_destroy(fb_class); |
| unregister_chrdev(FB_MAJOR, "fb"); |
| } |
| |
| 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)) { |
| if (!lock_fb_info(info)) |
| return -ENODEV; |
| event.info = info; |
| err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
| unlock_fb_info(info); |
| } |
| |
| return err; |
| } |
| |
| static char *video_options[FB_MAX] __read_mostly; |
| static int ofonly __read_mostly; |
| |
| /** |
| * fb_get_options - get kernel boot parameters |
| * @name: framebuffer name as it would appear in |
| * the boot parameter line |
| * (video=<name>:<options>) |
| * @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 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; |
| if (!video_options[i][0]) |
| 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; |
| } |
| |
| #ifndef MODULE |
| /** |
| * 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. |
| * |
| */ |
| static 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 && !strchr(options, ':')) { |
| fb_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 1; |
| } |
| __setup("video=", video_setup); |
| #endif |
| |
| /* |
| * Visible symbols for modules |
| */ |
| |
| EXPORT_SYMBOL(register_framebuffer); |
| EXPORT_SYMBOL(unregister_framebuffer); |
| EXPORT_SYMBOL(num_registered_fb); |
| EXPORT_SYMBOL(registered_fb); |
| 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_set_suspend); |
| EXPORT_SYMBOL(fb_get_options); |
| |
| MODULE_LICENSE("GPL"); |