Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
new file mode 100644
index 0000000..25f460c
--- /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");
