diff options
Diffstat (limited to 'drivers/video/fbmem.c')
| -rw-r--r-- | drivers/video/fbmem.c | 1371 |
1 files changed, 1371 insertions, 0 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c new file mode 100644 index 000000000000..25f460ca0daf --- /dev/null +++ b/drivers/video/fbmem.c @@ -0,0 +1,1371 @@ +/* + * 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/config.h> +#include <linux/module.h> + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/smp_lock.h> +#include <linux/kernel.h> +#include <linux/major.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/mman.h> +#include <linux/tty.h> +#include <linux/init.h> +#include <linux/linux_logo.h> +#include <linux/proc_fs.h> +#include <linux/console.h> +#ifdef CONFIG_KMOD +#include <linux/kmod.h> +#endif +#include <linux/devfs_fs_kernel.h> +#include <linux/err.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/efi.h> + +#if defined(__mc68000__) || defined(CONFIG_APUS) +#include <asm/setup.h> +#endif + +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/page.h> +#include <asm/pgtable.h> + +#include <linux/fb.h> + + /* + * 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 <linux/linux_logo.h> + +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=<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 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"); |