1934 строки
44 KiB
C
1934 строки
44 KiB
C
/*
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* linux/drivers/video/fbmem.c
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*
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* Copyright (C) 1994 Martin Schaller
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*
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* 2001 - Documented with DocBook
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* - Brad Douglas <brad@neruo.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <linux/compat.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/mman.h>
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#include <linux/vt.h>
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#include <linux/init.h>
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#include <linux/linux_logo.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/console.h>
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#include <linux/kmod.h>
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#include <linux/err.h>
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#include <linux/device.h>
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#include <linux/efi.h>
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#include <linux/fb.h>
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#include <asm/fb.h>
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/*
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* Frame buffer device initialization and setup routines
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*/
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#define FBPIXMAPSIZE (1024 * 8)
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static DEFINE_MUTEX(registration_lock);
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struct fb_info *registered_fb[FB_MAX] __read_mostly;
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EXPORT_SYMBOL(registered_fb);
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int num_registered_fb __read_mostly;
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EXPORT_SYMBOL(num_registered_fb);
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static struct fb_info *get_fb_info(unsigned int idx)
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{
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struct fb_info *fb_info;
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if (idx >= FB_MAX)
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return ERR_PTR(-ENODEV);
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mutex_lock(®istration_lock);
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fb_info = registered_fb[idx];
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if (fb_info)
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atomic_inc(&fb_info->count);
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mutex_unlock(®istration_lock);
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return fb_info;
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}
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static void put_fb_info(struct fb_info *fb_info)
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{
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if (!atomic_dec_and_test(&fb_info->count))
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return;
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if (fb_info->fbops->fb_destroy)
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fb_info->fbops->fb_destroy(fb_info);
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}
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int lock_fb_info(struct fb_info *info)
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{
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mutex_lock(&info->lock);
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if (!info->fbops) {
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mutex_unlock(&info->lock);
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return 0;
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}
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return 1;
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}
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EXPORT_SYMBOL(lock_fb_info);
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/*
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* Helpers
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*/
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int fb_get_color_depth(struct fb_var_screeninfo *var,
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struct fb_fix_screeninfo *fix)
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{
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int depth = 0;
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if (fix->visual == FB_VISUAL_MONO01 ||
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fix->visual == FB_VISUAL_MONO10)
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depth = 1;
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else {
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if (var->green.length == var->blue.length &&
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var->green.length == var->red.length &&
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var->green.offset == var->blue.offset &&
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var->green.offset == var->red.offset)
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depth = var->green.length;
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else
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depth = var->green.length + var->red.length +
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var->blue.length;
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}
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return depth;
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}
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EXPORT_SYMBOL(fb_get_color_depth);
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/*
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* Data padding functions.
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*/
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void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
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{
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__fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
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}
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EXPORT_SYMBOL(fb_pad_aligned_buffer);
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void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
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u32 shift_high, u32 shift_low, u32 mod)
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{
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u8 mask = (u8) (0xfff << shift_high), tmp;
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int i, j;
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for (i = height; i--; ) {
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for (j = 0; j < idx; j++) {
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tmp = dst[j];
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tmp &= mask;
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tmp |= *src >> shift_low;
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dst[j] = tmp;
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tmp = *src << shift_high;
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dst[j+1] = tmp;
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src++;
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}
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tmp = dst[idx];
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tmp &= mask;
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tmp |= *src >> shift_low;
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dst[idx] = tmp;
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if (shift_high < mod) {
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tmp = *src << shift_high;
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dst[idx+1] = tmp;
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}
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src++;
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dst += d_pitch;
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}
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}
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EXPORT_SYMBOL(fb_pad_unaligned_buffer);
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/*
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* we need to lock this section since fb_cursor
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* may use fb_imageblit()
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*/
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char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
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{
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u32 align = buf->buf_align - 1, offset;
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char *addr = buf->addr;
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/* If IO mapped, we need to sync before access, no sharing of
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* the pixmap is done
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*/
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if (buf->flags & FB_PIXMAP_IO) {
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if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
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info->fbops->fb_sync(info);
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return addr;
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}
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/* See if we fit in the remaining pixmap space */
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offset = buf->offset + align;
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offset &= ~align;
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if (offset + size > buf->size) {
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/* We do not fit. In order to be able to re-use the buffer,
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* we must ensure no asynchronous DMA'ing or whatever operation
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* is in progress, we sync for that.
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*/
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if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
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info->fbops->fb_sync(info);
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offset = 0;
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}
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buf->offset = offset + size;
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addr += offset;
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return addr;
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}
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EXPORT_SYMBOL(fb_get_buffer_offset);
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#ifdef CONFIG_LOGO
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static inline unsigned safe_shift(unsigned d, int n)
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{
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return n < 0 ? d >> -n : d << n;
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}
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static void fb_set_logocmap(struct fb_info *info,
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const struct linux_logo *logo)
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{
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struct fb_cmap palette_cmap;
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u16 palette_green[16];
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u16 palette_blue[16];
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u16 palette_red[16];
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int i, j, n;
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const unsigned char *clut = logo->clut;
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palette_cmap.start = 0;
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palette_cmap.len = 16;
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palette_cmap.red = palette_red;
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palette_cmap.green = palette_green;
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palette_cmap.blue = palette_blue;
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palette_cmap.transp = NULL;
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for (i = 0; i < logo->clutsize; i += n) {
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n = logo->clutsize - i;
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/* palette_cmap provides space for only 16 colors at once */
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if (n > 16)
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n = 16;
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palette_cmap.start = 32 + i;
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palette_cmap.len = n;
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for (j = 0; j < n; ++j) {
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palette_cmap.red[j] = clut[0] << 8 | clut[0];
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palette_cmap.green[j] = clut[1] << 8 | clut[1];
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palette_cmap.blue[j] = clut[2] << 8 | clut[2];
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clut += 3;
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}
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fb_set_cmap(&palette_cmap, info);
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}
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}
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static void fb_set_logo_truepalette(struct fb_info *info,
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const struct linux_logo *logo,
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u32 *palette)
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{
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static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
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unsigned char redmask, greenmask, bluemask;
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int redshift, greenshift, blueshift;
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int i;
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const unsigned char *clut = logo->clut;
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/*
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* We have to create a temporary palette since console palette is only
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* 16 colors long.
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*/
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/* Bug: Doesn't obey msb_right ... (who needs that?) */
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redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
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greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
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bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
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redshift = info->var.red.offset - (8 - info->var.red.length);
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greenshift = info->var.green.offset - (8 - info->var.green.length);
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blueshift = info->var.blue.offset - (8 - info->var.blue.length);
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for ( i = 0; i < logo->clutsize; i++) {
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palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
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safe_shift((clut[1] & greenmask), greenshift) |
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safe_shift((clut[2] & bluemask), blueshift));
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clut += 3;
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}
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}
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static void fb_set_logo_directpalette(struct fb_info *info,
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const struct linux_logo *logo,
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u32 *palette)
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{
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int redshift, greenshift, blueshift;
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int i;
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redshift = info->var.red.offset;
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greenshift = info->var.green.offset;
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blueshift = info->var.blue.offset;
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for (i = 32; i < 32 + logo->clutsize; i++)
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palette[i] = i << redshift | i << greenshift | i << blueshift;
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}
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static void fb_set_logo(struct fb_info *info,
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const struct linux_logo *logo, u8 *dst,
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int depth)
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{
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int i, j, k;
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const u8 *src = logo->data;
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u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
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u8 fg = 1, d;
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switch (fb_get_color_depth(&info->var, &info->fix)) {
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case 1:
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fg = 1;
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break;
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case 2:
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fg = 3;
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break;
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default:
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fg = 7;
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break;
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}
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if (info->fix.visual == FB_VISUAL_MONO01 ||
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info->fix.visual == FB_VISUAL_MONO10)
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fg = ~((u8) (0xfff << info->var.green.length));
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switch (depth) {
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case 4:
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for (i = 0; i < logo->height; i++)
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for (j = 0; j < logo->width; src++) {
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*dst++ = *src >> 4;
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j++;
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if (j < logo->width) {
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*dst++ = *src & 0x0f;
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j++;
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}
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}
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break;
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case 1:
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for (i = 0; i < logo->height; i++) {
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for (j = 0; j < logo->width; src++) {
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d = *src ^ xor;
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for (k = 7; k >= 0; k--) {
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*dst++ = ((d >> k) & 1) ? fg : 0;
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j++;
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}
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}
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}
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break;
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}
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}
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/*
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* Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
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* linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
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* the visual format and color depth of the framebuffer, the DAC, the
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* pseudo_palette, and the logo data will be adjusted accordingly.
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*
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* Case 1 - linux_logo_clut224:
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* Color exceeds the number of console colors (16), thus we set the hardware DAC
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* using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
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*
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* For visuals that require color info from the pseudo_palette, we also construct
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* one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
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* will be set.
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*
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* Case 2 - linux_logo_vga16:
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* The number of colors just matches the console colors, thus there is no need
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* to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
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* each byte contains color information for two pixels (upper and lower nibble).
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* To be consistent with fb_imageblit() usage, we therefore separate the two
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* nibbles into separate bytes. The "depth" flag will be set to 4.
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*
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* Case 3 - linux_logo_mono:
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* This is similar with Case 2. Each byte contains information for 8 pixels.
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* We isolate each bit and expand each into a byte. The "depth" flag will
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* be set to 1.
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*/
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static struct logo_data {
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int depth;
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int needs_directpalette;
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int needs_truepalette;
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int needs_cmapreset;
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const struct linux_logo *logo;
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} fb_logo __read_mostly;
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static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
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{
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u32 size = width * height, i;
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out += size - 1;
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for (i = size; i--; )
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*out-- = *in++;
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}
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static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
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{
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int i, j, h = height - 1;
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for (i = 0; i < height; i++)
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for (j = 0; j < width; j++)
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out[height * j + h - i] = *in++;
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}
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static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
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{
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int i, j, w = width - 1;
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for (i = 0; i < height; i++)
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for (j = 0; j < width; j++)
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out[height * (w - j) + i] = *in++;
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}
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static void fb_rotate_logo(struct fb_info *info, u8 *dst,
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struct fb_image *image, int rotate)
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{
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u32 tmp;
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if (rotate == FB_ROTATE_UD) {
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fb_rotate_logo_ud(image->data, dst, image->width,
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image->height);
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image->dx = info->var.xres - image->width - image->dx;
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image->dy = info->var.yres - image->height - image->dy;
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} else if (rotate == FB_ROTATE_CW) {
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fb_rotate_logo_cw(image->data, dst, image->width,
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image->height);
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tmp = image->width;
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image->width = image->height;
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image->height = tmp;
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tmp = image->dy;
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image->dy = image->dx;
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image->dx = info->var.xres - image->width - tmp;
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} else if (rotate == FB_ROTATE_CCW) {
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fb_rotate_logo_ccw(image->data, dst, image->width,
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image->height);
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tmp = image->width;
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image->width = image->height;
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image->height = tmp;
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tmp = image->dx;
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image->dx = image->dy;
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image->dy = info->var.yres - image->height - tmp;
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}
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image->data = dst;
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}
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static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
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int rotate, unsigned int num)
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{
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unsigned int x;
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if (rotate == FB_ROTATE_UR) {
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for (x = 0;
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x < num && image->dx + image->width <= info->var.xres;
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x++) {
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info->fbops->fb_imageblit(info, image);
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image->dx += image->width + 8;
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}
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} else if (rotate == FB_ROTATE_UD) {
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for (x = 0; x < num; x++) {
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info->fbops->fb_imageblit(info, image);
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image->dx -= image->width + 8;
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}
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} else if (rotate == FB_ROTATE_CW) {
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for (x = 0;
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x < num && image->dy + image->height <= info->var.yres;
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x++) {
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info->fbops->fb_imageblit(info, image);
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image->dy += image->height + 8;
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}
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} else if (rotate == FB_ROTATE_CCW) {
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for (x = 0; x < num; x++) {
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info->fbops->fb_imageblit(info, image);
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image->dy -= image->height + 8;
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}
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}
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}
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static int fb_show_logo_line(struct fb_info *info, int rotate,
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const struct linux_logo *logo, int y,
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unsigned int n)
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{
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u32 *palette = NULL, *saved_pseudo_palette = NULL;
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unsigned char *logo_new = NULL, *logo_rotate = NULL;
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struct fb_image image;
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/* Return if the frame buffer is not mapped or suspended */
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if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
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info->flags & FBINFO_MODULE)
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return 0;
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image.depth = 8;
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image.data = logo->data;
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if (fb_logo.needs_cmapreset)
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fb_set_logocmap(info, logo);
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if (fb_logo.needs_truepalette ||
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fb_logo.needs_directpalette) {
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palette = kmalloc(256 * 4, GFP_KERNEL);
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if (palette == NULL)
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return 0;
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if (fb_logo.needs_truepalette)
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fb_set_logo_truepalette(info, logo, palette);
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else
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fb_set_logo_directpalette(info, logo, palette);
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saved_pseudo_palette = info->pseudo_palette;
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info->pseudo_palette = palette;
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}
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if (fb_logo.depth <= 4) {
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logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
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if (logo_new == NULL) {
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kfree(palette);
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if (saved_pseudo_palette)
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info->pseudo_palette = saved_pseudo_palette;
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return 0;
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}
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image.data = logo_new;
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fb_set_logo(info, logo, logo_new, fb_logo.depth);
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}
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image.dx = 0;
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image.dy = y;
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image.width = logo->width;
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image.height = logo->height;
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if (rotate) {
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logo_rotate = kmalloc(logo->width *
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logo->height, GFP_KERNEL);
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if (logo_rotate)
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fb_rotate_logo(info, logo_rotate, &image, rotate);
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}
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|
|
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 */
|
|
EXPORT_SYMBOL(fb_prepare_logo);
|
|
EXPORT_SYMBOL(fb_show_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_inode(file);
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL(fb_pan_display);
|
|
|
|
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;
|
|
|
|
/* When using FOURCC mode, make sure the red, green, blue and
|
|
* transp fields are set to 0.
|
|
*/
|
|
if ((info->fix.capabilities & FB_CAP_FOURCC) &&
|
|
var->grayscale > 1) {
|
|
if (var->red.offset || var->green.offset ||
|
|
var->blue.offset || var->transp.offset ||
|
|
var->red.length || var->green.length ||
|
|
var->blue.length || var->transp.length ||
|
|
var->red.msb_right || var->green.msb_right ||
|
|
var->blue.msb_right || var->transp.msb_right)
|
|
return -EINVAL;
|
|
}
|
|
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL(fb_set_var);
|
|
|
|
int
|
|
fb_blank(struct fb_info *info, int blank)
|
|
{
|
|
struct fb_event event;
|
|
int ret = -EINVAL, early_ret;
|
|
|
|
if (blank > FB_BLANK_POWERDOWN)
|
|
blank = FB_BLANK_POWERDOWN;
|
|
|
|
event.info = info;
|
|
event.data = ␣
|
|
|
|
early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
|
|
|
|
if (info->fbops->fb_blank)
|
|
ret = info->fbops->fb_blank(blank, info);
|
|
|
|
if (!ret)
|
|
fb_notifier_call_chain(FB_EVENT_BLANK, &event);
|
|
else {
|
|
/*
|
|
* if fb_blank is failed then revert effects of
|
|
* the early blank event.
|
|
*/
|
|
if (!early_ret)
|
|
fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(fb_blank);
|
|
|
|
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;
|
|
console_lock();
|
|
if (!lock_fb_info(info)) {
|
|
console_unlock();
|
|
return -ENODEV;
|
|
}
|
|
info->flags |= FBINFO_MISC_USEREVENT;
|
|
ret = fb_set_var(info, &var);
|
|
info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
unlock_fb_info(info);
|
|
console_unlock();
|
|
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;
|
|
console_lock();
|
|
if (!lock_fb_info(info)) {
|
|
console_unlock();
|
|
return -ENODEV;
|
|
}
|
|
ret = fb_pan_display(info, &var);
|
|
unlock_fb_info(info);
|
|
console_unlock();
|
|
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 >= 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;
|
|
console_lock();
|
|
if (!lock_fb_info(info)) {
|
|
console_unlock();
|
|
return -ENODEV;
|
|
}
|
|
event.info = info;
|
|
ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
|
|
unlock_fb_info(info);
|
|
console_unlock();
|
|
break;
|
|
case FBIOBLANK:
|
|
console_lock();
|
|
if (!lock_fb_info(info)) {
|
|
console_unlock();
|
|
return -ENODEV;
|
|
}
|
|
info->flags |= FBINFO_MISC_USEREVENT;
|
|
ret = fb_blank(info, arg);
|
|
info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
unlock_fb_info(info);
|
|
console_unlock();
|
|
break;
|
|
default:
|
|
if (!lock_fb_info(info))
|
|
return -ENODEV;
|
|
fb = info->fbops;
|
|
if (fb->fb_ioctl)
|
|
ret = fb->fb_ioctl(info, cmd, arg);
|
|
else
|
|
ret = -ENOTTY;
|
|
unlock_fb_info(info);
|
|
}
|
|
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));
|
|
|
|
if (err)
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
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 mmio_pgoff;
|
|
unsigned long start;
|
|
u32 len;
|
|
|
|
if (!info)
|
|
return -ENODEV;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Ugh. This can be either the frame buffer mapping, or
|
|
* if pgoff points past it, the mmio mapping.
|
|
*/
|
|
start = info->fix.smem_start;
|
|
len = info->fix.smem_len;
|
|
mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
|
|
if (vma->vm_pgoff >= mmio_pgoff) {
|
|
if (info->var.accel_flags) {
|
|
mutex_unlock(&info->mm_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
vma->vm_pgoff -= mmio_pgoff;
|
|
start = info->fix.mmio_start;
|
|
len = info->fix.mmio_len;
|
|
}
|
|
mutex_unlock(&info->mm_lock);
|
|
|
|
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
|
|
fb_pgprotect(file, vma, start);
|
|
|
|
return vm_iomap_memory(vma, start, len);
|
|
}
|
|
|
|
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 int do_remove_conflicting_framebuffers(struct apertures_struct *a,
|
|
const char *name, bool primary)
|
|
{
|
|
int i, ret;
|
|
|
|
/* 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: switching to %s from %s\n",
|
|
name, registered_fb[i]->fix.id);
|
|
ret = do_unregister_framebuffer(registered_fb[i]);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool lockless_register_fb;
|
|
module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
|
|
MODULE_PARM_DESC(lockless_register_fb,
|
|
"Lockless framebuffer registration for debugging [default=off]");
|
|
|
|
static int do_register_framebuffer(struct fb_info *fb_info)
|
|
{
|
|
int i, ret;
|
|
struct fb_event event;
|
|
struct fb_videomode mode;
|
|
|
|
if (fb_check_foreignness(fb_info))
|
|
return -ENOSYS;
|
|
|
|
ret = do_remove_conflicting_framebuffers(fb_info->apertures,
|
|
fb_info->fix.id,
|
|
fb_is_primary_device(fb_info));
|
|
if (ret)
|
|
return ret;
|
|
|
|
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);
|
|
|
|
if (fb_info->skip_vt_switch)
|
|
pm_vt_switch_required(fb_info->dev, false);
|
|
else
|
|
pm_vt_switch_required(fb_info->dev, true);
|
|
|
|
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 (!lockless_register_fb)
|
|
console_lock();
|
|
if (!lock_fb_info(fb_info)) {
|
|
if (!lockless_register_fb)
|
|
console_unlock();
|
|
return -ENODEV;
|
|
}
|
|
|
|
fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
|
|
unlock_fb_info(fb_info);
|
|
if (!lockless_register_fb)
|
|
console_unlock();
|
|
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;
|
|
|
|
console_lock();
|
|
if (!lock_fb_info(fb_info)) {
|
|
console_unlock();
|
|
return -ENODEV;
|
|
}
|
|
|
|
event.info = fb_info;
|
|
ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
|
|
unlock_fb_info(fb_info);
|
|
console_unlock();
|
|
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
pm_vt_switch_unregister(fb_info->dev);
|
|
|
|
unlink_framebuffer(fb_info);
|
|
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);
|
|
event.info = fb_info;
|
|
console_lock();
|
|
fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
|
|
console_unlock();
|
|
|
|
/* this may free fb info */
|
|
put_fb_info(fb_info);
|
|
return 0;
|
|
}
|
|
|
|
int unlink_framebuffer(struct fb_info *fb_info)
|
|
{
|
|
int i;
|
|
|
|
i = fb_info->node;
|
|
if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
|
|
return -EINVAL;
|
|
|
|
if (fb_info->dev) {
|
|
device_destroy(fb_class, MKDEV(FB_MAJOR, i));
|
|
fb_info->dev = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(unlink_framebuffer);
|
|
|
|
int remove_conflicting_framebuffers(struct apertures_struct *a,
|
|
const char *name, bool primary)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(®istration_lock);
|
|
ret = do_remove_conflicting_framebuffers(a, name, primary);
|
|
mutex_unlock(®istration_lock);
|
|
|
|
return ret;
|
|
}
|
|
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;
|
|
}
|
|
EXPORT_SYMBOL(register_framebuffer);
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
EXPORT_SYMBOL(unregister_framebuffer);
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(fb_set_suspend);
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int ret;
|
|
|
|
if (!proc_create("fb", 0, NULL, &fb_proc_fops))
|
|
return -ENOMEM;
|
|
|
|
ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
|
|
if (ret) {
|
|
printk("unable to get major %d for fb devs\n", FB_MAJOR);
|
|
goto err_chrdev;
|
|
}
|
|
|
|
fb_class = class_create(THIS_MODULE, "graphics");
|
|
if (IS_ERR(fb_class)) {
|
|
ret = PTR_ERR(fb_class);
|
|
pr_warn("Unable to create fb class; errno = %d\n", ret);
|
|
fb_class = NULL;
|
|
goto err_class;
|
|
}
|
|
return 0;
|
|
|
|
err_class:
|
|
unregister_chrdev(FB_MAJOR, "fb");
|
|
err_chrdev:
|
|
remove_proc_entry("fb", NULL);
|
|
return ret;
|
|
}
|
|
|
|
#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)) {
|
|
event.info = info;
|
|
err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|