Subversion Repositories shark

Rev

Rev 466 | Rev 469 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed

/*
 *  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 <linuxcomp.h>

#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>
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
#include <linux/devfs_fs_kernel.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>

#ifdef CONFIG_FRAMEBUFFER_CONSOLE
#include "console/fbcon.h"
#endif
    /*
     *  Frame buffer device initialization and setup routines
     */


extern int acornfb_init(void);
extern int acornfb_setup(char*);
extern int amifb_init(void);
extern int amifb_setup(char*);
extern int anakinfb_init(void);
extern int atafb_init(void);
extern int atafb_setup(char*);
extern int macfb_init(void);
extern int macfb_setup(char*);
extern int cyberfb_init(void);
extern int cyberfb_setup(char*);
extern int pm2fb_init(void);
extern int pm2fb_setup(char*);
extern int pm3fb_init(void);
extern int pm3fb_setup(char*);
extern int clps711xfb_init(void);
extern int cyber2000fb_init(void);
extern int cyber2000fb_setup(char*);
extern int retz3fb_init(void);
extern int retz3fb_setup(char*);
extern int clgenfb_init(void);
extern int clgenfb_setup(char*);
extern int hitfb_init(void);
extern int vfb_init(void);
extern int vfb_setup(char*);
extern int offb_init(void);
extern int atyfb_init(void);
extern int atyfb_setup(char*);
extern int aty128fb_init(void);
extern int aty128fb_setup(char*);
extern int neofb_init(void);
extern int neofb_setup(char*);
extern int igafb_init(void);
extern int igafb_setup(char*);
extern int imsttfb_init(void);
extern int imsttfb_setup(char*);
extern int dnfb_init(void);
extern int tgafb_init(void);
extern int tgafb_setup(char*);
extern int virgefb_init(void);
extern int virgefb_setup(char*);
extern int resolver_video_setup(char*);
extern int s3triofb_init(void);
extern int vesafb_init(void);
extern int vesafb_setup(char*);
extern int vga16fb_init(void);
extern int vga16fb_setup(char*);
extern int hgafb_init(void);
extern int hgafb_setup(char*);
extern int matroxfb_init(void);
extern int matroxfb_setup(char*);
extern int hpfb_init(void);
extern int control_init(void);
extern int control_setup(char*);
extern int platinum_init(void);
extern int platinum_setup(char*);
extern int valkyriefb_init(void);
extern int valkyriefb_setup(char*);
extern int chips_init(void);
extern int g364fb_init(void);
extern int sa1100fb_init(void);
extern int fm2fb_init(void);
extern int fm2fb_setup(char*);
extern int q40fb_init(void);
extern int sun3fb_init(void);
extern int sun3fb_setup(char *);
extern int sgivwfb_init(void);
extern int sgivwfb_setup(char*);
extern int rivafb_init(void);
extern int rivafb_setup(char*);
extern int tdfxfb_init(void);
extern int tdfxfb_setup(char*);
extern int tridentfb_init(void);
extern int tridentfb_setup(char*);
extern int sisfb_init(void);
extern int sisfb_setup(char*);
extern int stifb_init(void);
extern int stifb_setup(char*);
extern int pmagbafb_init(void);
extern int pmagbbfb_init(void);
extern int maxinefb_init(void);
extern int tx3912fb_init(void);
extern int tx3912fb_setup(char*);
extern int radeonfb_init(void);
extern int radeonfb_setup(char*);
extern int e1355fb_init(void);
extern int e1355fb_setup(char*);
extern int pvr2fb_init(void);
extern int pvr2fb_setup(char*);
extern int sstfb_init(void);
extern int sstfb_setup(char*);
extern int i810fb_init(void);
extern int i810fb_setup(char*);
extern int ffb_init(void);
extern int ffb_setup(char*);
extern int cg6_init(void);
extern int cg6_setup(char*);
extern int cg3_init(void);
extern int cg3_setup(char*);
extern int bw2_init(void);
extern int bw2_setup(char*);
extern int cg14_init(void);
extern int cg14_setup(char*);
extern int p9100_init(void);
extern int p9100_setup(char*);
extern int tcx_init(void);
extern int tcx_setup(char*);
extern int leo_init(void);
extern int leo_setup(char*);

static struct {
        const char *name;
        int (*init)(void);
        int (*setup)(char*);
} fb_drivers[] __initdata = {

        /*
         * Chipset specific drivers that use resource management
         */

#ifdef CONFIG_FB_RETINAZ3
        { "retz3fb", retz3fb_init, retz3fb_setup },
#endif
#ifdef CONFIG_FB_AMIGA
        { "amifb", amifb_init, amifb_setup },
#endif
#ifdef CONFIG_FB_ANAKIN
        { "anakinfb", anakinfb_init, NULL },
#endif
#ifdef CONFIG_FB_CLPS711X
        { "clps711xfb", clps711xfb_init, NULL },
#endif
#ifdef CONFIG_FB_CYBER
        { "cyberfb", cyberfb_init, cyberfb_setup },
#endif
#ifdef CONFIG_FB_CYBER2000
        { "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
#endif
#ifdef CONFIG_FB_PM2
        { "pm2fb", pm2fb_init, pm2fb_setup },
#endif
#ifdef CONFIG_FB_PM3
        { "pm3fb", pm3fb_init, pm3fb_setup },
#endif          
#ifdef CONFIG_FB_CLGEN
        { "clgenfb", clgenfb_init, clgenfb_setup },
#endif
#ifdef CONFIG_FB_ATY
        { "atyfb", atyfb_init, atyfb_setup },
#endif
#ifdef CONFIG_FB_MATROX
        { "matroxfb", matroxfb_init, matroxfb_setup },
#endif
#ifdef CONFIG_FB_ATY128
        { "aty128fb", aty128fb_init, aty128fb_setup },
#endif
#ifdef CONFIG_FB_NEOMAGIC
        { "neofb", neofb_init, neofb_setup },
#endif
#ifdef CONFIG_FB_VIRGE
        { "virgefb", virgefb_init, virgefb_setup },
#endif
#ifdef CONFIG_FB_RIVA
        { "rivafb", rivafb_init, rivafb_setup },
#endif
#ifdef CONFIG_FB_3DFX
        { "tdfxfb", tdfxfb_init, tdfxfb_setup },
#endif
#ifdef CONFIG_FB_RADEON
        { "radeonfb", radeonfb_init, radeonfb_setup },
#endif
#ifdef CONFIG_FB_CONTROL
        { "controlfb", control_init, control_setup },
#endif
#ifdef CONFIG_FB_PLATINUM
        { "platinumfb", platinum_init, platinum_setup },
#endif
#ifdef CONFIG_FB_VALKYRIE
        { "valkyriefb", valkyriefb_init, valkyriefb_setup },
#endif
#ifdef CONFIG_FB_CT65550
        { "chipsfb", chips_init, NULL },
#endif
#ifdef CONFIG_FB_IMSTT
        { "imsttfb", imsttfb_init, imsttfb_setup },
#endif
#ifdef CONFIG_FB_S3TRIO
        { "s3triofb", s3triofb_init, NULL },
#endif
#ifdef CONFIG_FB_FM2
        { "fm2fb", fm2fb_init, fm2fb_setup },
#endif
#ifdef CONFIG_FB_SIS
        { "sisfb", sisfb_init, sisfb_setup },
#endif
#ifdef CONFIG_FB_TRIDENT
        { "tridentfb", tridentfb_init, tridentfb_setup },
#endif
#ifdef CONFIG_FB_I810
        { "i810fb", i810fb_init, i810fb_setup },
#endif 
#ifdef CONFIG_FB_STI
        { "stifb", stifb_init, stifb_setup },
#endif
#ifdef CONFIG_FB_FFB
        { "ffb", ffb_init, ffb_setup },
#endif
#ifdef CONFIG_FB_CG6
        { "cg6fb", cg6_init, cg6_setup },
#endif
#ifdef CONFIG_FB_CG3
        { "cg3fb", cg3_init, cg3_setup },
#endif
#ifdef CONFIG_FB_BW2
        { "bw2fb", bw2_init, bw2_setup },
#endif
#ifdef CONFIG_FB_CG14
        { "cg14fb", cg14_init, cg14_setup },
#endif
#ifdef CONFIG_FB_P9100
        { "p9100fb", p9100_init, p9100_setup },
#endif
#ifdef CONFIG_FB_TCX
        { "tcxfb", tcx_init, tcx_setup },
#endif
#ifdef CONFIG_FB_LEO
        { "leofb", leo_init, leo_setup },
#endif

        /*
         * Generic drivers that are used as fallbacks
         *
         * These depend on resource management and must be initialized
         * _after_ all other frame buffer devices that use resource
         * management!
         */


#ifdef CONFIG_FB_OF
        { "offb", offb_init, NULL },
#endif
#ifdef CONFIG_FB_VESA
        { "vesafb", vesafb_init, vesafb_setup },
#endif

        /*
         * Chipset specific drivers that don't use resource management (yet)
         */


#ifdef CONFIG_FB_SGIVW
        { "sgivwfb", sgivwfb_init, sgivwfb_setup },
#endif
#ifdef CONFIG_FB_ACORN
        { "acornfb", acornfb_init, acornfb_setup },
#endif
#ifdef CONFIG_FB_ATARI
        { "atafb", atafb_init, atafb_setup },
#endif
#ifdef CONFIG_FB_MAC
        { "macfb", macfb_init, macfb_setup },
#endif
#ifdef CONFIG_FB_HGA
        { "hgafb", hgafb_init, hgafb_setup },
#endif
#ifdef CONFIG_FB_IGA
        { "igafb", igafb_init, igafb_setup },
#endif
#ifdef CONFIG_APOLLO
        { "apollofb", dnfb_init, NULL },
#endif
#ifdef CONFIG_FB_Q40
        { "q40fb", q40fb_init, NULL },
#endif
#ifdef CONFIG_FB_TGA
        { "tgafb", tgafb_init, tgafb_setup },
#endif
#ifdef CONFIG_FB_HP300
        { "hpfb", hpfb_init, NULL },
#endif
#ifdef CONFIG_FB_G364
        { "g364fb", g364fb_init, NULL },
#endif
#ifdef CONFIG_FB_SA1100
        { "sa1100fb", sa1100fb_init, NULL },
#endif
#ifdef CONFIG_FB_SUN3
        { "sun3fb", sun3fb_init, sun3fb_setup },
#endif
#ifdef CONFIG_FB_HIT
        { "hitfb", hitfb_init, NULL },
#endif
#ifdef CONFIG_FB_TX3912
        { "tx3912fb", tx3912fb_init, tx3912fb_setup },
#endif
#ifdef CONFIG_FB_E1355
        { "e1355fb", e1355fb_init, e1355fb_setup },
#endif
#ifdef CONFIG_FB_PVR2
        { "pvr2fb", pvr2fb_init, pvr2fb_setup },
#endif
#ifdef CONFIG_FB_PMAG_BA
        { "pmagbafb", pmagbafb_init, NULL },
#endif          
#ifdef CONFIG_FB_PMAGB_B
        { "pmagbbfb", pmagbbfb_init, NULL },
#endif
#ifdef CONFIG_FB_MAXINE
        { "maxinefb", maxinefb_init, NULL },
#endif            
#ifdef CONFIG_FB_VOODOO1
        { "sstfb", sstfb_init, sstfb_setup },
#endif
        /*
         * Generic drivers that don't use resource management (yet)
         */


#ifdef CONFIG_FB_VGA16
        { "vga16fb", vga16fb_init, vga16fb_setup },
#endif

#ifdef CONFIG_GSP_RESOLVER
        /* Not a real frame buffer device... */
        { "resolverfb", NULL, resolver_video_setup },
#endif

#ifdef CONFIG_FB_VIRTUAL
        /*
         * Vfb must be last to avoid that it becomes your primary display if
         * other display devices are present
         */

        { "vfb", vfb_init, vfb_setup },
#endif
};

#define NUM_FB_DRIVERS  (sizeof(fb_drivers)/sizeof(*fb_drivers))
#define FBPIXMAPSIZE    8192

//extern const char *global_mode_option;

static initcall_t pref_init_funcs[FB_MAX];
static int num_pref_init_funcs __initdata = 0;
struct fb_info *registered_fb[FB_MAX];
int num_registered_fb;

#ifdef CONFIG_FB_OF
static int ofonly __initdata = 0;
#endif

/*
 * Drawing helpers.
 */

u8 sys_inbuf(u8 *src)
{      
        return *src;
}

void sys_outbuf(u8 *src, u8 *dst, unsigned int size)
{
        memcpy(dst, src, size);
}      

void move_buf_aligned(struct fb_info *info, u8 *dst, u8 *src, u32 d_pitch,
                        u32 s_pitch, u32 height)
{
        int i;

        for (i = height; i--; ) {
                info->pixmap.outbuf(src, dst, s_pitch);
                src += s_pitch;
                dst += d_pitch;
        }
}

void move_buf_unaligned(struct fb_info *info, u8 *dst, u8 *src, u32 d_pitch,
                        u32 height, u32 mask, u32 shift_high, u32 shift_low,
                        u32 mod, u32 idx)
{
        int i, j;
        u8 tmp;

        for (i = height; i--; ) {
                for (j = 0; j < idx; j++) {
                        tmp = info->pixmap.inbuf(dst+j);
                        tmp &= mask;
                        tmp |= *src >> shift_low;
                        info->pixmap.outbuf(&tmp, dst+j, 1);
                        tmp = *src << shift_high;
                        info->pixmap.outbuf(&tmp, dst+j+1, 1);
                        src++;
                }
                tmp = info->pixmap.inbuf(dst+idx);
                tmp &= mask;
                tmp |= *src >> shift_low;
                info->pixmap.outbuf(&tmp, dst+idx, 1);
                if (shift_high < mod) {
                        tmp = *src << shift_high;
                        info->pixmap.outbuf(&tmp, dst+idx+1, 1);
                }      
                src++;
                dst += d_pitch;
        }
}

/*
 * we need to lock this section since fb_cursor
 * may use fb_imageblit()
 */

u32 fb_get_buffer_offset(struct fb_info *info, u32 size)
{
        u32 align = info->pixmap.buf_align - 1;
        u32 offset, count = 1000;

        spin_lock(&info->pixmap.lock);
        offset = info->pixmap.offset + align;
        offset &= ~align;
        if (offset + size > info->pixmap.size) {
                while (atomic_read(&info->pixmap.count) && count--);
                if (info->fbops->fb_sync &&
                    info->pixmap.flags & FB_PIXMAP_SYNC)
                        info->fbops->fb_sync(info);
                offset = 0;
        }
        info->pixmap.offset = offset + size;
        atomic_inc(&info->pixmap.count);       
        smp_mb__after_atomic_inc();
        spin_unlock(&info->pixmap.lock);
        return offset;
}

#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 __init 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, 1, info);
        }
}

static void  __init 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 __init 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 __init fb_set_logo(struct fb_info *info,
                               const struct linux_logo *logo, u8 *dst,
                               int depth)
{
        int i, j, shift;
        const u8 *src = logo->data;
        u8 d, xor = 0;

        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:
                xor = 0xff;
        case 1:
                for (i = 0; i < logo->height; i++) {
                        shift = 7;
                        d = *src++ ^ xor;
                        for (j = 0; j < logo->width; j++) {
                                *dst++ = (d >> shift) & 1;
                                shift = (shift-1) & 7;
                                if (shift == 7)
                                        d = *src++ ^ xor;
                        }
                }
                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)
{
        memset(&fb_logo, 0, sizeof(struct logo_data));

        switch (info->fix.visual) {
        case FB_VISUAL_TRUECOLOR:
                if (info->var.bits_per_pixel >= 8)
                        fb_logo.needs_truepalette = 1;
                break;
        case FB_VISUAL_DIRECTCOLOR:
                if (info->var.bits_per_pixel >= 24) {
                        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(info->var.bits_per_pixel);
       
        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 */
        if (fb_logo.logo == NULL)
                return 0;

        image.depth = fb_logo.depth;
        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) {
                        if (palette)
                                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);
                //atomic_dec(&info->pixmap.count);
                //smp_mb__after_atomic_dec();
        }
       
        if (palette != NULL)
                kfree(palette);
        if (saved_pseudo_palette != NULL)
                info->pseudo_palette = saved_pseudo_palette;
        if (logo_new != NULL)
                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 < &registered_fb[FB_MAX] && len < 4000; fi++)
                if (*fi)
                        clen += sprintf26(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 *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];

        if (!info || ! info->screen_base)
                return -ENODEV;

        if (info->fbops->fb_read)
                return info->fbops->fb_read(file, buf, count, ppos);
       
        if (p >= info->fix.smem_len)
            return 0;
        if (count >= info->fix.smem_len)
            count = info->fix.smem_len;
        if (count + p > info->fix.smem_len)
                count = info->fix.smem_len - p;
        if (info->fbops->fb_sync)
                info->fbops->fb_sync(info);
        if (count) {
            char *base_addr;

            base_addr = info->screen_base;
            count -= copy_to_user(buf, base_addr+p, count);
            if (!count)
                return -EFAULT;
            *ppos += count;
        }
        return count;
}

static ssize_t
fb_write(struct file *file, const char *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];
        int err;

        if (!info || !info->screen_base)
                return -ENODEV;

        if (info->fbops->fb_write)
                return info->fbops->fb_write(file, buf, count, ppos);
       
        if (p > info->fix.smem_len)
            return -ENOSPC;
        if (count >= info->fix.smem_len)
            count = info->fix.smem_len;
        err = 0;
        if (count + p > info->fix.smem_len) {
            count = info->fix.smem_len - p;
            err = -ENOSPC;
        }
        if (info->fbops->fb_sync)
                info->fbops->fb_sync(info);
        if (count) {
            char *base_addr;

            base_addr = info->screen_base;
            count -= copy_from_user(base_addr+p, buf, count);
            *ppos += count;
            err = -EFAULT;
        }
        if (count)
                return count;
        return err;
}

#ifdef CONFIG_KMOD
static void try_to_load(int fb)
{
        request_module("fb%d", fb);
}
#endif /* CONFIG_KMOD */

int
fb_cursor(struct fb_info *info, struct fb_cursor *sprite)
{
        struct fb_cursor cursor;
        int err;
       
        if (copy_from_user(&cursor, sprite, sizeof(struct fb_cursor)))
                return -EFAULT;

        if (cursor.set & FB_CUR_SETCUR)
                info->cursor.enable = 1;
       
        if (cursor.set & FB_CUR_SETCMAP) {
                err = fb_copy_cmap(&cursor.image.cmap, &sprite->image.cmap, 1);
                if (err)
                        return err;
        }
       
        if (cursor.set & FB_CUR_SETSHAPE) {
                int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;              
                if ((cursor.image.height != info->cursor.image.height) ||
                    (cursor.image.width != info->cursor.image.width))
                        cursor.set |= FB_CUR_SETSIZE;
               
                cursor.image.data = kmalloc(size, GFP_KERNEL);
                if (!cursor.image.data)
                        return -ENOMEM;
               
                cursor.mask = kmalloc(size, GFP_KERNEL);
                if (!cursor.mask) {
                        kfree(cursor.image.data);
                        return -ENOMEM;
                }
               
                if (copy_from_user(&cursor.image.data, sprite->image.data, size) ||
                    copy_from_user(cursor.mask, sprite->mask, size)) {
                        kfree(cursor.image.data);
                        kfree(cursor.mask);
                        return -EFAULT;
                }
        }
        info->cursor.set = cursor.set;
        info->cursor.rop = cursor.rop;
        err = info->fbops->fb_cursor(info, &cursor);
        return err;
}

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 (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) {
                        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, 1, info);
                }
        }
        return 0;
}

int
fb_blank(struct fb_info *info, int blank)
{      
        /* ??? Variable sized stack allocation.  */
        u16 black[info->cmap.len];
        struct fb_cmap cmap;
       
        if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
                return 0;
        if (blank) {
                memset(black, 0, info->cmap.len * sizeof(u16));
                cmap.red = cmap.green = cmap.blue = black;
                cmap.transp = info->cmap.transp ? black : NULL;
                cmap.start = info->cmap.start;
                cmap.len = info->cmap.len;
        } else
                cmap = info->cmap;
        return fb_set_cmap(&cmap, 1, info);
}

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;
#ifdef CONFIG_FRAMEBUFFER_CONSOLE
        struct fb_con2fbmap con2fb;
#endif
        struct fb_cmap cmap;
        int i;
       
        if (!fb)
                return -ENODEV;
        switch (cmd) {
        case FBIOGET_VSCREENINFO:
                return copy_to_user((void *) arg, &info->var,
                                    sizeof(var)) ? -EFAULT : 0;
        case FBIOPUT_VSCREENINFO:
                if (copy_from_user(&var, (void *) arg, sizeof(var)))
                        return -EFAULT;
                i = fb_set_var(info, &var);
                if (i) return i;
                if (copy_to_user((void *) arg, &var, sizeof(var)))
                        return -EFAULT;
                return 0;
        case FBIOGET_FSCREENINFO:
                return copy_to_user((void *) arg, &info->fix,
                                    sizeof(fix)) ? -EFAULT : 0;
        case FBIOPUTCMAP:
                if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
                        return -EFAULT;
                return (fb_set_cmap(&cmap, 0, info));
        case FBIOGETCMAP:
                if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
                        return -EFAULT;
                return (fb_copy_cmap(&info->cmap, &cmap, 0));
        case FBIOPAN_DISPLAY:
                if (copy_from_user(&var, (void *) arg, sizeof(var)))
                        return -EFAULT;
                if ((i = fb_pan_display(info, &var)))
                        return i;
                if (copy_to_user((void *) arg, &var, sizeof(var)))
                        return -EFAULT;
                return 0;
        case FBIO_CURSOR:
                return (fb_cursor(info, (struct fb_cursor *) arg));
#ifdef CONFIG_FRAMEBUFFER_CONSOLE
        case FBIOGET_CON2FBMAP:
                if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
                        return -EFAULT;
                if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
                    return -EINVAL;
                con2fb.framebuffer = con2fb_map[con2fb.console-1];
                return copy_to_user((void *)arg, &con2fb,
                                    sizeof(con2fb)) ? -EFAULT : 0;
        case FBIOPUT_CON2FBMAP:
                if (copy_from_user(&con2fb, (void *)arg, 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;
                if (con2fb.console != 0)
                        set_con2fb_map(con2fb.console-1, con2fb.framebuffer);
                else
                        fb_console_init();             
                return 0;
#endif  /* CONFIG_FRAMEBUFFER_CONSOLE */
        case FBIOBLANK:
                return fb_blank(info, arg);
        default:
                if (fb->fb_ioctl == NULL)
                        return -EINVAL;
                return fb->fb_ioctl(inode, file, cmd, arg, info);
        }
}

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;
#if defined(__sparc_v9__)
        vma->vm_flags |= (VM_SHM | VM_LOCKED);
        if (io_remap_page_range(vma, vma->vm_start, off,
                                vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
                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__)
        pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
#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__)
        pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
        pgprot_val(vma->vm_page_prot) |= _CACHE_UNCACHED;
#elif defined(__sh__)
        pgprot_val(vma->vm_page_prot) &= ~_PAGE_CACHABLE;
#elif defined(__hppa__)
        pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
#elif defined(__ia64__) || defined(__arm__)
        vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
#else
#warning What do we have to do here??
#endif
        if (io_remap_page_range(vma, vma->vm_start, off,
                             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,
        .mmap =         fb_mmap,
        .open =         fb_open,
        .release =      fb_release,
#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
        .get_unmapped_area = get_fb_unmapped_area,
#endif
};

/**
 *      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;

        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;
       
        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.flags = FB_PIXMAP_DEFAULT;
                }
        }      
        fb_info->pixmap.offset = 0;
        if (fb_info->pixmap.outbuf == NULL)
                fb_info->pixmap.outbuf = sys_outbuf;
        if (fb_info->pixmap.inbuf == NULL)
                fb_info->pixmap.inbuf = sys_inbuf;
        spin_lock_init(&fb_info->pixmap.lock);

        registered_fb[i] = fb_info;

        devfs_mk_cdev(MKDEV(FB_MAJOR, i),
                        S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
        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)
                kfree(fb_info->pixmap.addr);
        registered_fb[i]=NULL;
        num_registered_fb--;
        return 0;
}


/**
 *      fbmem_init - init frame buffer subsystem
 *
 *      Initialize the frame buffer subsystem.
 *
 *      NOTE: This function is _only_ to be called by drivers/char/mem.c.
 *
 */


void __init
fbmem_init(void)
{
        int i;

        create_proc_read_entry("fb", 0, 0, 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);

#ifdef CONFIG_FB_OF
        if (ofonly) {
                offb_init();
                return;
        }
#endif

        /*
         *  Probe for all builtin frame buffer devices
         */

        for (i = 0; i < num_pref_init_funcs; i++)
                pref_init_funcs[i]();

        for (i = 0; i < NUM_FB_DRIVERS; i++)
                if (fb_drivers[i].init)
                        fb_drivers[i].init();
}


/**
 *      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.
 *
 *      Returns zero.
 *
 */


int __init video_setup(char *options)
{
        int i, j;

        if (!options || !*options)
                return 0;
           
#ifdef CONFIG_FB_OF
        if (!strcmp(options, "ofonly")) {
                ofonly = 1;
                return 0;
        }
#endif

        if (num_pref_init_funcs == FB_MAX)
                return 0;

        for (i = 0; i < NUM_FB_DRIVERS; i++) {
                j = strlen(fb_drivers[i].name);
                if (!strncmp(options, fb_drivers[i].name, j) &&
                        options[j] == ':') {
                        if (!strcmp(options+j+1, "off"))
                                fb_drivers[i].init = NULL;
                        else {
                                if (fb_drivers[i].init) {
                                        pref_init_funcs[num_pref_init_funcs++] =
                                                fb_drivers[i].init;
                                        fb_drivers[i].init = NULL;
                                }
                                if (fb_drivers[i].setup)
                                        fb_drivers[i].setup(options+j+1);
                        }
                        return 0;
                }
        }

        /*
         * If we get here no fb was specified.
         * We consider the argument to be a global video mode option.
         */

        //global_mode_option = options;
        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(move_buf_unaligned);
EXPORT_SYMBOL(move_buf_aligned);

MODULE_LICENSE("GPL");