/*
 *      epson1356fb.c  --  Epson SED1356 Framebuffer Driver
 *
 *      Copyright 2001, 2002, 2003 MontaVista Software Inc.
 *      Author: MontaVista Software, Inc.
 *              stevel@mvista.com or source@mvista.com
 *
 *      This program is free software; you can redistribute  it and/or modify it
 *      under  the terms of  the GNU General  Public License as published by the
 *      Free Software Foundation;  either version 2 of the  License, or (at your
 *      option) any later version.
 *
 *      THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *      WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *      MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *      NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *      INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *      NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *      USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *      ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *      (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *      THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *      You should have received a copy of the  GNU General Public License along
 *      with this program; if not, write  to the Free Software Foundation, Inc.,
 *      675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * 
 *      TODO:
 *
 *      Revision history
 *      03.12.2001  0.1   Initial release
 *
 */

#include <linux/config.h>
#include <linux/version.h>
#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/selection.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/nvram.h>
#include <linux/kd.h>
#include <linux/vt_kern.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/timer.h>
#include <linux/pagemap.h>

#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm/tlb.h>

#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>

#include <linux/spinlock.h>

#include <video/e1356fb.h>

#ifdef CONFIG_SOC_AU1X00
#include <asm/au1000.h>
#endif

#define E1356FB_DEBUG 1
#undef E1356FB_VERBOSE_DEBUG
#undef SHADOW_FRAME_BUFFER
#include "epson1356fb.h"

static char *options;
MODULE_PARM(options, "s");

/*
 *  Frame buffer device API
 */
static int e1356fb_open(struct fb_info *fb, int user);
static int e1356fb_release(struct fb_info *fb, int user);
static int e1356fb_get_fix(struct fb_fix_screeninfo* fix, 
                           int con,
                           struct fb_info* fb);
static int e1356fb_get_var(struct fb_var_screeninfo* var, 
                           int con,
                           struct fb_info* fb);
static int e1356fb_set_var(struct fb_var_screeninfo* var,
                           int con,
                           struct fb_info* fb);
static int e1356fb_pan_display(struct fb_var_screeninfo* var, 
                               int con,
                               struct fb_info* fb);
static int e1356fb_get_cmap(struct fb_cmap *cmap, 
                            int kspc, 
                            int con,
                            struct fb_info* info);
static int e1356fb_set_cmap(struct fb_cmap* cmap, 
                            int kspc, 
                            int con,
                            struct fb_info* info);
static int e1356fb_ioctl(struct inode* inode, 
                         struct file* file, 
                         u_int cmd,
                         u_long arg, 
                         int con, 
                         struct fb_info* info);
static int e1356fb_mmap(struct fb_info *info,
                        struct file *file,
                        struct vm_area_struct *vma);

/*
 *  Interface to the low level console driver
 */
static int  e1356fb_switch_con(int con, 
                               struct fb_info* fb);
static int  e1356fb_updatevar(int con, 
                              struct fb_info* fb);
static void e1356fb_blank(int blank, 
                          struct fb_info* fb);

/*
 *  Internal routines
 */
static void e1356fb_set_par(const struct e1356fb_par* par,
                            struct fb_info_e1356* 
                            info);
static int  e1356fb_var_to_par(const struct fb_var_screeninfo *var,
                               struct e1356fb_par* par,
                               const struct fb_info_e1356* info);
static int  e1356fb_par_to_var(struct fb_var_screeninfo* var,
                               struct e1356fb_par* par,
                               const struct fb_info_e1356* info);
static int  e1356fb_encode_fix(struct fb_fix_screeninfo* fix,
                               const struct e1356fb_par* par,
                               const struct fb_info_e1356* info);
static void e1356fb_set_dispsw(struct display* disp, 
                               struct fb_info_e1356* info,
                               int bpp, 
                               int accel);
static int  e1356fb_getcolreg(u_int regno,
                              u_int* red, 
                              u_int* green, 
                              u_int* blue,
                              u_int* transp, 
                              struct fb_info* fb);
static int  e1356fb_setcolreg(u_int regno, 
                              u_int red, 
                              u_int green, 
                              u_int blue,
                              u_int transp, 
                              struct fb_info* fb);
static void  e1356fb_install_cmap(struct display *d, 
                                  struct fb_info *info);

static void e1356fb_hwcursor_init(struct fb_info_e1356* info);
static void e1356fb_createcursorshape(struct display* p);
static void e1356fb_createcursor(struct display * p);  

/*
 * do_xxx: Hardware-specific functions
 */
static void  do_pan_var(struct fb_var_screeninfo* var,
                        struct fb_info_e1356* i);
static void  do_flashcursor(unsigned long ptr);
static void  doBlt_Move(const struct e1356fb_par* par,
                        struct fb_info_e1356* i,
                        blt_info_t* blt);
static void  doBlt_SolidFill(const struct e1356fb_par* par,
                             struct fb_info_e1356* i,
                             blt_info_t* blt);

/*
 *  Interface used by the world
 */
int e1356fb_init(void);
void e1356fb_setup(char *options, int *ints);

static int currcon = 0;

static struct fb_ops e1356fb_ops = {
        owner:  THIS_MODULE,
        fb_open:        e1356fb_open,
        fb_release:     e1356fb_release,
        fb_get_fix:     e1356fb_get_fix,
        fb_get_var:     e1356fb_get_var,
        fb_set_var:     e1356fb_set_var,
        fb_get_cmap:    e1356fb_get_cmap,
        fb_set_cmap:    e1356fb_set_cmap,
        fb_pan_display: e1356fb_pan_display,
        fb_ioctl:       e1356fb_ioctl,
        fb_mmap:        e1356fb_mmap,
};

#define PCI_VENDOR_ID_EPSON         0x10f4
#define PCI_DEVICE_ID_EPSON_SDU1356 0x1300


static struct fb_info_e1356 fb_info;
static struct e1356fb_fix boot_fix; // boot options
static struct e1356fb_par boot_par; // boot options

/* ------------------------------------------------------------------------- 
 *                      Hardware-specific funcions
 * ------------------------------------------------------------------------- */

/*
 * The SED1356 has only a 16-bit wide data bus, so some embedded
 * implementations with 32-bit CPU's (Alchemy Pb1000) may not
 * correctly emulate a 32-bit write to the framebuffer by splitting
 * the write into two seperate 16-bit writes. So it is safest to
 * only do byte or half-word writes to the fb. This routine assumes
 * fbaddr is atleast aligned on a half-word boundary.
 */
static inline void
fbfill(u16* fbaddr, u8 val, int size)
{
        u16 valw = (u16)val | ((u16)val << 8);
        for ( ; size >= 2; size -= 2)
                writew(valw, fbaddr++);
        if (size)
                writeb(val, (u8*)fbaddr);
}

static inline int
e1356_wait_bitclr(u8* reg, u8 bit, int timeout)
{
        while (readb(reg) & bit) {
                udelay(10);
                if (!--timeout)
                        break;
        }
        return timeout;
}

static inline int
e1356_wait_bitset(u8* reg, u8 bit, int timeout)
{
        while (!(readb(reg) & bit)) {
                udelay(10);
                if (!--timeout)
                        break;
        }
        return timeout;
}


static struct fb_videomode panel_modedb[] = {
        {
                /* 320x240 @ 109 Hz, 33.3 kHz hsync */
                NULL, 109, 320, 240, KHZ2PICOS(MAX_PIXCLOCK/3),
                16, 16, 32, 24, 48, 8,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 640x480 @ 84 Hz, 48.1 kHz hsync */
                NULL, 84, 640, 480, KHZ2PICOS(MAX_PIXCLOCK/1),
                96, 32, 32, 48, 64, 8,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 76 Hz, 46.3 kHz hsync */
                NULL, 76, 800, 600, KHZ2PICOS(MAX_PIXCLOCK/1),
                32, 10, 1, 1, 22, 1,
                0, FB_VMODE_NONINTERLACED
        }
};
static struct fb_videomode crt_modedb[] = {
        {
                /* 320x240 @ 84 Hz, 31.25 kHz hsync */
                NULL, 84, 320, 240, KHZ2PICOS(MAX_PIXCLOCK/2),
                128, 128, 60, 60, 64, 8,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 320x240 @ 109 Hz, 33.3 kHz hsync */
                NULL, 109, 320, 240, KHZ2PICOS(MAX_PIXCLOCK/3),
                16, 16, 32, 24, 48, 8,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 512x384 @ 77 Hz, 31.25 kHz hsync */
                NULL, 77, 512, 384, KHZ2PICOS(MAX_PIXCLOCK/2),
                48, 16, 16, 1, 64, 3,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 640x400 @ 88 Hz, 43.1 kHz hsync */
                NULL, 88, 640, 400, KHZ2PICOS(MAX_PIXCLOCK/1),
                128, 96, 32, 48, 64, 8,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 640x480 @ 84 Hz, 48.1 kHz hsync */
                NULL, 84, 640, 480, KHZ2PICOS(MAX_PIXCLOCK/1),
                96, 32, 32, 48, 64, 8,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 768x576 @ 62 Hz, 38.5 kHz hsync */
                NULL, 62, 768, 576, KHZ2PICOS(MAX_PIXCLOCK/1),
                144, 16, 28, 6, 112, 4,
                0, FB_VMODE_NONINTERLACED
        }, {
                /* 800x600 @ 60 Hz, 37.9 kHz hsync */
                NULL, 60, 800, 600, KHZ2PICOS(MAX_PIXCLOCK/1),
                88, 40, 23, 1, 128, 4,
                FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
                FB_VMODE_NONINTERLACED
        }
};

static struct fb_videomode ntsc_modedb[] = {
        {
                /* 640x480 @ 62 Hz, requires flicker filter */
                //NULL, 62, 640, 480, 34921, 213, 57, 20, 2, 0, 0,
                NULL, 62, 640, 480, KHZ2PICOS(2*NTSC_PIXCLOCK),
                200, 70, 15, 7, 0, 0,
                FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
        }
};
static struct fb_videomode pal_modedb[] = {
        {
                /* 640x480 @ 56 Hz, requires flicker filter */
                NULL, 56, 640, 480, KHZ2PICOS(2*PAL_PIXCLOCK),
                350, 145, 49, 23, 0, 0,
                FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
        }
};


static inline void
fb_videomode_to_var(struct fb_videomode* mode,
                    struct fb_var_screeninfo*var)
{
        var->xres = mode->xres;
        var->yres = mode->yres;
        var->pixclock = mode->pixclock;
        var->left_margin = mode->left_margin;
        var->right_margin = mode->right_margin;
        var->upper_margin = mode->upper_margin;
        var->lower_margin = mode->lower_margin;
        var->hsync_len = mode->hsync_len;
        var->vsync_len = mode->vsync_len;
        var->sync = mode->sync;
        var->vmode = mode->vmode;
}


static int
e1356fb_get_mode(const struct fb_info_e1356 *info,
                 int xres,
                 int yres,
                 struct fb_videomode ** modedb,
                 struct fb_videomode ** mode)
{
        struct fb_videomode * ret;
        int i, dbsize;

        if (IS_PANEL(info->fix.disp_type)) {
                ret = panel_modedb;
                dbsize = sizeof(panel_modedb)/sizeof(struct fb_videomode);
        } else if (info->fix.disp_type == DISP_TYPE_CRT) {
                ret = crt_modedb;
                dbsize = sizeof(crt_modedb)/sizeof(struct fb_videomode);
        } else if (info->fix.disp_type == DISP_TYPE_NTSC) {
                ret = ntsc_modedb;
                dbsize = sizeof(ntsc_modedb)/sizeof(struct fb_videomode);
        } else {
                ret = pal_modedb;
                dbsize = sizeof(pal_modedb)/sizeof(struct fb_videomode);
        }
        
        if (modedb)
                *modedb = ret;
        for (i=0; i<dbsize; i++) {
                if (xres == ret[i].xres && yres == ret[i].yres) {
                        *mode = &ret[i];
                        break;
                }
        }
        if (i == dbsize)
                return -EINVAL;
        return dbsize;
}



#ifdef E1356FB_VERBOSE_DEBUG
static void
dump_par(const struct e1356fb_par* par)
{
        DPRINTK("width:       %d\n", par->width);
        DPRINTK("height:      %d\n", par->height);
        DPRINTK("width_virt:  %d\n", par->width_virt);
        DPRINTK("height_virt: %d\n", par->height_virt);
        DPRINTK("bpp:         %d\n", par->bpp);
        DPRINTK("pixclock:    %d\n", par->ipclk.pixclk);
        DPRINTK("horiz_ndp:   %d\n", par->horiz_ndp);
        DPRINTK("vert_ndp:    %d\n", par->vert_ndp);
        DPRINTK("hsync_pol:   %d\n", par->hsync_pol);
        DPRINTK("hsync_start: %d\n", par->hsync_start);
        DPRINTK("hsync_width: %d\n", par->hsync_width);
        DPRINTK("vsync_pol:   %d\n", par->vsync_pol);
        DPRINTK("vsync_start: %d\n", par->vsync_start);
        DPRINTK("vsync_width: %d\n", par->vsync_width);
        DPRINTK("cmap_len:    %d\n", par->cmap_len);
}

static void
dump_display_regs(reg_dispcfg_t* dispcfg, reg_dispmode_t* dispmode)
{
        DPRINTK("hdw:            0x%02x\n", readb(&dispcfg->hdw));
        DPRINTK("hndp:           0x%02x\n", readb(&dispcfg->hndp));
        DPRINTK("hsync_start:    0x%02x\n", readb(&dispcfg->hsync_start));
        DPRINTK("hsync_pulse:    0x%02x\n", readb(&dispcfg->hsync_pulse));
        DPRINTK("vdh0:           0x%02x\n", readb(&dispcfg->vdh0));
        DPRINTK("vdh1:           0x%02x\n", readb(&dispcfg->vdh1));
        DPRINTK("vndp:           0x%02x\n", readb(&dispcfg->vndp));
        DPRINTK("vsync_start:    0x%02x\n", readb(&dispcfg->vsync_start));
        DPRINTK("vsync_pulse:    0x%02x\n", readb(&dispcfg->vsync_pulse));
        DPRINTK("tv_output_ctrl: 0x%02x\n\n", readb(&dispcfg->tv_output_ctrl));

        DPRINTK("disp_mode:        0x%02x\n", readb(&dispmode->disp_mode));
        DPRINTK("lcd_misc:         0x%02x\n", readb(&dispmode->lcd_misc));
        DPRINTK("start_addr0:      0x%02x\n", readb(&dispmode->start_addr0));
        DPRINTK("start_addr1:      0x%02x\n", readb(&dispmode->start_addr1));
        DPRINTK("start_addr2:      0x%02x\n", readb(&dispmode->start_addr2));
        DPRINTK("mem_addr_offset0: 0x%02x\n", readb(&dispmode->mem_addr_offset0));
        DPRINTK("mem_addr_offset1: 0x%02x\n", readb(&dispmode->mem_addr_offset1));
        DPRINTK("pixel_panning:    0x%02x\n", readb(&dispmode->pixel_panning));
        DPRINTK("fifo_high_thresh: 0x%02x\n", readb(&dispmode->fifo_high_thresh));
        DPRINTK("fifo_low_thresh:  0x%02x\n", readb(&dispmode->fifo_low_thresh));
}

static void
dump_fb(u8* base, int len)
{
        int i;
        DPRINTK("FB memory dump, start 0x%p, len %d", base, len);
        for (i=0; i<len; i++) {
                if (!(i%16))
                        printk("\n%p: %02x ", &base[i], readb(&base[i]));
                else
                        printk("%02x ", readb(&base[i]));
        }
        printk("\n");
}

#endif // E1356FB_VERBOSE_DEBUG



// Input:  ipclk->clksrc, ipclk->pixclk_d
// Output: ipclk->pixclk, ipclk->error, and ipclk->divisor
static int
get_nearest_pixclk_div(pixclock_info_t* ipclk, int x2)
{
        int pixclk_d = ipclk->pixclk_d;
        int clksrc = ipclk->clksrc;

        if (x2) clksrc *= 2;

        if (clksrc < (3*pixclk_d+1)/2)
                ipclk->divisor = 1;
        else if (clksrc < (5*pixclk_d+1)/2)
                ipclk->divisor = 2;
        else if (clksrc < (7*pixclk_d+1)/2)
                ipclk->divisor = 3;
        else if (clksrc < (9*pixclk_d+1)/2)
                ipclk->divisor = 4;
        else
                return -ENXIO;

        ipclk->pixclk = clksrc / ipclk->divisor;
        ipclk->error = (100*(pixclk_d - ipclk->pixclk)) / pixclk_d;
        return 0;
}

static int
e1356_calc_pixclock(const struct fb_info_e1356 *info,
                    pixclock_info_t* ipclk)
{
        int src_sel=-1, flicker_mult=0;
        pixclock_info_t test, ret;
    
        if (ipclk->pixclk > info->max_pixclock)
                return -ENXIO;

        test.pixclk_d = ipclk->pixclk_d;
        ret.error = 100;
        
        if (IS_TV(info->fix.disp_type) &&
            (info->fix.tv_filt & TV_FILT_FLICKER))
                flicker_mult = 0x80;
        
        test.clksrc = info->fix.busclk;
        if (get_nearest_pixclk_div(&test, flicker_mult != 0) == 0 &&
            abs(test.error) < abs(ret.error)) {
                ret = test;
                src_sel = 0x01;
        }

        test.clksrc = info->fix.mclk;
        if (get_nearest_pixclk_div(&test, flicker_mult != 0) == 0 &&
            abs(test.error) < abs(ret.error)) {
                ret = test;
                src_sel = 0x03;
        }

        test.clksrc = info->fix.clki;
        if (get_nearest_pixclk_div(&test, flicker_mult != 0) == 0 &&
            abs(test.error) < abs(ret.error)) {
                ret = test;
                src_sel = 0x00;
        }

        test.clksrc = info->fix.clki2;
        if (get_nearest_pixclk_div(&test, flicker_mult != 0) == 0 &&
            abs(test.error) < abs(ret.error)) {
                ret = test;
                src_sel = 0x02;
        }

        if (ret.error > MAX_PCLK_ERROR_LOWER ||
            ret.error < MAX_PCLK_ERROR_HIGHER)
                return -ENXIO;
    
        ret.pixclk_bits = flicker_mult | ((ret.divisor-1)<<4) | src_sel;
        *ipclk = ret;
        return 0;
}

static inline int
e1356_engine_wait_complete(reg_bitblt_t* bltreg)
{
        return e1356_wait_bitclr(&bltreg->ctrl0, 0x80, 5000);
}
static inline int
e1356_engine_wait_busy(reg_bitblt_t* bltreg)
{
        return e1356_wait_bitset(&bltreg->ctrl0, 0x80, 5000);
}

static void
e1356fb_engine_init(const struct e1356fb_par* par,
                    struct fb_info_e1356* info)
{
        reg_bitblt_t* bltreg = info->reg.bitblt;
    
        e1356_engine_wait_complete(bltreg);

        writeb(0, &bltreg->ctrl0);
        writeb(0, &bltreg->ctrl1);
        writeb(0, &bltreg->rop_code);
        writeb(0, &bltreg->operation);
        writeb(0, &bltreg->src_start_addr0);
        writeb(0, &bltreg->src_start_addr1);
        writeb(0, &bltreg->src_start_addr2);
        writeb(0, &bltreg->dest_start_addr0);
        writeb(0, &bltreg->dest_start_addr1);
        writeb(0, &bltreg->dest_start_addr2);
        writew(0, &bltreg->mem_addr_offset0);
        writew(0, &bltreg->width0);
        writew(0, &bltreg->height0);
        writew(0, &bltreg->bg_color0);
        writew(0, &bltreg->fg_color0);
}


static void doBlt_Write(const struct e1356fb_par* par,
                        struct fb_info_e1356* info,
                        blt_info_t* blt)
{
        reg_bitblt_t* bltreg = info->reg.bitblt;
        int nWords, nTotalWords;
        u32 srcphase, dstAddr;
        u16* w16;
        u32 stride = par->width_virt * par->Bpp;

        dstAddr = blt->dst_x * par->Bpp + blt->dst_y * stride;
        srcphase = (u32)blt->src & 1;
    
        if (blt->attribute & BLT_ATTR_TRANSPARENT)
                writew(blt->bg_color, &bltreg->bg_color0);
        else
                writeb(blt->rop, &bltreg->rop_code);
    
        writeb(blt->operation, &bltreg->operation);
        writeb((u8)srcphase, &bltreg->src_start_addr0);
        writew(stride/2, &bltreg->mem_addr_offset0);

        writeb(dstAddr, &bltreg->dest_start_addr0);
        writeb(dstAddr>>8, &bltreg->dest_start_addr1);
        writeb(dstAddr>>16, &bltreg->dest_start_addr2);

        writew(blt->dst_width-1, &bltreg->width0);
        writew(blt->dst_height-1, &bltreg->height0);

        // program color format operation
        writeb(par->bpp == 8 ? 0x00 : 0x01, &bltreg->ctrl1);

        // start it up
        writeb(0x80, &bltreg->ctrl0);

        // wait for it to actually start
        e1356_engine_wait_busy(bltreg);

        // calculate the number of 16 bit words per one blt line

        nWords = srcphase + ((blt->dst_width - srcphase)*par->Bpp + 1) / 2;
        nTotalWords = nWords*blt->dst_height;
        w16 = (u16*)((u32)blt->src & 0xfffffffe);   // Word aligned

        while (nTotalWords > 0) {
                int j, nFIFO;
                u8 ctrl0;

                // read the FIFO status
                ctrl0 = readb(&bltreg->ctrl0);

                if ((ctrl0 & 0x30) == 0x20)
                        // FIFO is at least half full, but not full
                        nFIFO = 1;
                else if ((ctrl0 & 0x40) == 0)
                        // FIFO is empty
                        nFIFO = 16;
                else
                        // FIFO is full
                        continue;

                for (j = 0; j < nFIFO && nTotalWords > 0; j++,nTotalWords--)
                        writew(*w16++, info->reg.bitblt_data);
        }

        e1356_engine_wait_complete(bltreg);
}


static void
doBlt_SolidFill(const struct e1356fb_par* par,
                struct fb_info_e1356* info,
                blt_info_t* blt)
{
        reg_bitblt_t* bltreg = info->reg.bitblt;
        u32 width = blt->dst_width, height = blt->dst_height;
        u32 stride = par->width_virt * par->Bpp;
        u32 dest_addr = (blt->dst_y * stride) + (blt->dst_x * par->Bpp);

        if (width == 0 || height == 0)
                return;

        // program dest address
        writeb(dest_addr & 0x00ff, &bltreg->dest_start_addr0);
        writeb((dest_addr>>8) & 0x00ff, &bltreg->dest_start_addr1);
        writeb((dest_addr>>16) & 0x00ff, &bltreg->dest_start_addr2);

        // program width and height of solid-fill blit
        writew(width-1, &bltreg->width0);
        writew(height-1, &bltreg->height0);

        // program color of fill
        writew(blt->fg_color, &bltreg->fg_color0);
        // select solid-fill BLIT
        writeb(BLT_SOLID_FILL, &bltreg->operation);
        // program color format operation
        writeb(par->bpp == 8 ? 0x00 : 0x01, &bltreg->ctrl1);
        // program BLIT memory offset
        writew(stride/2, &bltreg->mem_addr_offset0);

        // start it up (self completes)
        writeb(0x80, &bltreg->ctrl0);

        e1356_engine_wait_complete(bltreg);
}


static void
doBlt_Move(const struct e1356fb_par* par,
           struct fb_info_e1356* info,
           blt_info_t* blt)
{
        reg_bitblt_t* bltreg = info->reg.bitblt;
        int neg_dir=0;
        u32 dest_addr, src_addr;
        u32 bpp = par->bpp;
        u32 stride = par->width_virt * par->Bpp; // virt line length in bytes
        u32 srcx = blt->src_x, srcy = blt->src_y;
        u32 dstx = blt->dst_x, dsty = blt->dst_y;
        u32 width = blt->dst_width, height = blt->dst_height;
    
        if (width == 0 || height == 0)
                return;
   
        src_addr = srcx*par->Bpp + srcy*stride;
        dest_addr = dstx*par->Bpp + dsty*stride;

        /*
         * See if regions overlap and dest region is beyond source region.
         * If so, we need to do a move BLT in negative direction. Only applies
         * if the BLT is not transparent.
         */
        if (!(blt->attribute & BLT_ATTR_TRANSPARENT)) {
                if ((srcx + width  > dstx) && (srcx < dstx + width) &&
                    (srcy + height > dsty) && (srcy < dsty + height) &&
                    (dest_addr > src_addr)) {
                        neg_dir = 1;
                        // negative direction : get the coords of lower right corner
                        src_addr += stride * (height-1) + par->Bpp * (width-1);
                        dest_addr += stride * (height-1) + par->Bpp * (width-1);
                }
        }
    
        // program BLIT memory offset
        writew(stride/2, &bltreg->mem_addr_offset0);

        // program src and dest addresses
        writeb(src_addr & 0x00ff, &bltreg->src_start_addr0);
        writeb((src_addr>>8) & 0x00ff, &bltreg->src_start_addr1);
        writeb((src_addr>>16) & 0x00ff, &bltreg->src_start_addr2);
        writeb(dest_addr & 0x00ff, &bltreg->dest_start_addr0);
        writeb((dest_addr>>8) & 0x00ff, &bltreg->dest_start_addr1);
        writeb((dest_addr>>16) & 0x00ff, &bltreg->dest_start_addr2);

        // program width and height of blit
        writew(width-1, &bltreg->width0);
        writew(height-1, &bltreg->height0);

        // program color format operation
        writeb(bpp == 8 ? 0x00 : 0x01, &bltreg->ctrl1);

        // set the blt type
        if (blt->attribute & BLT_ATTR_TRANSPARENT) {
                writew(blt->bg_color, &bltreg->bg_color0);
                writeb(BLT_MOVE_POS_TRANSP, &bltreg->operation); 
        } else {
                writeb(blt->rop, &bltreg->rop_code);
                // select pos/neg move BLIT
                writeb(neg_dir ? BLT_MOVE_NEG_ROP : BLT_MOVE_POS_ROP,
                       &bltreg->operation); 
        }

        // start it up (self completes)
        writeb(0x80, &bltreg->ctrl0);

        e1356_engine_wait_complete(bltreg);
}


static void doBlt_ColorExpand(const struct e1356fb_par* par,
                              struct fb_info_e1356* info,
                              blt_info_t* blt)
{
        reg_bitblt_t* bltreg = info->reg.bitblt;
        int i, j, nWords, Sx, Sy;
        u32 dstAddr;
        u16* wpt, *wpt1;
        u32 stride = par->width_virt * par->Bpp;

        if (blt->dst_width == 0 || blt->dst_height == 0)
                return;

        Sx = blt->src_x;
        Sy = blt->src_y;

        writeb((7 - Sx%8), &bltreg->rop_code);

        writeb(blt->operation, &bltreg->operation);

        writeb((u8)(Sx & 1), &bltreg->src_start_addr0);

        dstAddr = blt->dst_x*par->Bpp + blt->dst_y * stride;
        writeb(dstAddr, &bltreg->dest_start_addr0);
        writeb(dstAddr>>8, &bltreg->dest_start_addr1);
        writeb(dstAddr>>16, &bltreg->dest_start_addr2);

        // program color format operation
        writeb(par->bpp == 8 ? 0x00 : 0x01, &bltreg->ctrl1);
        writew(stride/2, &bltreg->mem_addr_offset0);
        writew(blt->dst_width-1, &bltreg->width0);
        writew(blt->dst_height-1, &bltreg->height0);
        writew(blt->bg_color, &bltreg->bg_color0);
        writew(blt->fg_color, &bltreg->fg_color0);

        // start it up
        writeb(0x80, &bltreg->ctrl0);

        // wait for it to actually start
        e1356_engine_wait_busy(bltreg);

        // calculate the number of 16 bit words per one blt line

        nWords = (Sx%16 + blt->dst_width + 15)/16;

        wpt = blt->src + (Sy*blt->srcstride + Sx/16)/2;

        for (i = 0; i < blt->dst_height; i++) {
                wpt1 = wpt;

                for (j = 0; j < nWords; j++) {
                        // loop until FIFO becomes empty...
                        e1356_wait_bitclr(&bltreg->ctrl0, 0x40, 10000);
                        writew(*wpt1++, info->reg.bitblt_data);
                }
        
                wpt += blt->srcstride/2;
        }

        e1356_engine_wait_complete(bltreg);
}


/*
 * The BitBLT operation dispatcher
 */
static int
doBlt(const struct e1356fb_par* par,
      struct fb_info_e1356* info,
      blt_info_t* blt)
{
        /*
         * Make sure we're not reentering in the middle of an
         * active BitBLT operation. ALWAYS call this dispatcher
         * and not one of the above BLT routines directly, or you
         * run the risk of overlapping BLT operations, which can
         * cause complete system hangs.
     */
        if (readb(&info->reg.bitblt->ctrl0) & 0x80)
                return -ENXIO;
    
        switch (blt->operation) {
        case BLT_MOVE_POS_ROP:
        case BLT_MOVE_NEG_ROP:
        case BLT_MOVE_POS_TRANSP:
                doBlt_Move(par, info, blt);
                break;
        case BLT_COLOR_EXP:
        case BLT_COLOR_EXP_TRANSP:
                doBlt_ColorExpand(par, info, blt);
                break;
        case BLT_SOLID_FILL:
                doBlt_SolidFill(par, info, blt);
                break;
        case BLT_WRITE_ROP:
        case BLT_WRITE_TRANSP:
                doBlt_Write(par, info, blt);
                break;
        case BLT_READ:
        case BLT_PAT_FILL_ROP:
        case BLT_PAT_FILL_TRANSP:
        case BLT_MOVE_COLOR_EXP:
        case BLT_MOVE_COLOR_EXP_TRANSP:
                DPRINTK("BitBLT operation 0x%02x not implemented yet\n",
                        blt->operation);
                return -ENXIO;
        default:
                DPRINTK("Unknown BitBLT operation 0x%02x\n", blt->operation);
                return -ENXIO;
        }
    
        return 0;
}


// Initializes blt->src and blt->srcstride
static void fill_putcs_buffer(struct display *p,
                              blt_info_t* blt,
                              const unsigned short* str,
                              int count)
{   
        int row, i, j;
        u8* b1, *b2;
        u32 fw = fontwidth(p);
        u32 fwb = (fw + 7) >> 3;
        u32 fh = fontheight(p);
        int bytesPerChar = fwb * fh;

        if (count*bytesPerChar > PAGE_SIZE) {
                // Truncate the string if it overflows putcs_buffer, which is
                // one page in size.
                count = PAGE_SIZE/bytesPerChar - 1;
        }

        blt->srcstride = (fwb*count + 1) & ~1; //round up to be even
        
        b1 = (u8*)blt->src;

        for (row = 0; row < fh; row++) {
                b2 = b1;
                for (i = 0; i < count; i++) {
                        for (j=0; j<fwb; j++)
                                *b2++ = p->fontdata[(str[i] & p->charmask) *
                                                   bytesPerChar +
                                                   row*fwb + j];
                }
                b1 += blt->srcstride;
        }
}


/*
 * Set the color of a palette entry in 8bpp mode 
 */
static inline void
do_setpalentry(reg_lut_t* lut, unsigned regno,
               u8 r, u8 g, u8 b)
{
        writeb(0x00, &lut->mode);
        writeb((u8)regno, &lut->addr);
        writeb(r&0xf0, &lut->data);
        writeb(g&0xf0, &lut->data);
        writeb(b&0xf0, &lut->data);
}

   
static void
do_pan_var(struct fb_var_screeninfo* var, struct fb_info_e1356* info)
{
        u32 pixel_start, start_addr;
        u8 pixel_pan;
        struct e1356fb_par* par = &info->current_par;
        reg_misc_t* misc = info->reg.misc;
        reg_dispmode_t* dispmode = (IS_PANEL(info->fix.disp_type)) ?
                info->reg.lcd_mode : info->reg.crttv_mode;
        
        pixel_start = var->yoffset * par->width_virt + var->xoffset;
        start_addr = (pixel_start * par->Bpp) / 2;
        pixel_pan = (par->bpp == 8) ? (u8)(pixel_start & 1) : 0;
    
        if (readb(&misc->disp_mode) != 0) {
                reg_dispcfg_t* dispcfg = (IS_PANEL(info->fix.disp_type)) ?
                        info->reg.lcd_cfg : info->reg.crttv_cfg;

                // wait for the end of the current VNDP
                e1356_wait_bitclr(&dispcfg->vndp, 0x80, 5000);
                // now wait for the start of a new VNDP
                e1356_wait_bitset(&dispcfg->vndp, 0x80, 5000);
        }
    
        writeb((u8)(start_addr & 0xff), &dispmode->start_addr0);
        writeb((u8)((start_addr>>8) & 0xff), &dispmode->start_addr1);
        writeb((u8)((start_addr>>16) & 0xff), &dispmode->start_addr2);
        writeb(pixel_pan, &dispmode->pixel_panning);
}


/*
 * Invert the hardware cursor image (timerfunc)  
 */
static void
do_flashcursor(unsigned long ptr)
{
        u8 curs_ctrl;
        struct fb_info_e1356* info = (struct fb_info_e1356 *)ptr;
        reg_inkcurs_t* inkcurs = (IS_PANEL(info->fix.disp_type)) ?
                info->reg.lcd_inkcurs : info->reg.crttv_inkcurs;

        spin_lock(&info->cursor.lock);
        // toggle cursor enable bit
        curs_ctrl = readb(&inkcurs->ctrl);
        writeb((curs_ctrl ^ 0x01) & 0x01, &inkcurs->ctrl);
        info->cursor.timer.expires = jiffies+HZ/2;
        add_timer(&info->cursor.timer);
        spin_unlock(&info->cursor.lock);
}

#ifdef SHADOW_FRAME_BUFFER
/*
 * Write BLT the shadow frame buffer to the real fb (timerfunc)  
 */
static void
do_write_shadow_fb(unsigned long ptr)
{
        blt_info_t blt;
        struct fb_info_e1356 *info = (struct fb_info_e1356*)ptr;
        struct fb_info* fb = &info->fb_info;
        struct e1356fb_par* par = &info->current_par;
        u32 stride = par->width_virt * par->Bpp;

        unsigned long j_start = jiffies;
    
        blt.src_x = blt.src_y = 0;
        blt.attribute = 0;
        blt.dst_width = par->width;
        blt.dst_height = par->height;
        blt.dst_y = fb->var.yoffset;
        blt.dst_x = fb->var.xoffset;
        blt.operation = BLT_WRITE_ROP;
        blt.rop = 0x0c; // ROP: destination = source
        blt.src = (u16*)(info->shadow.fb + blt.dst_x * par->Bpp +
                         blt.dst_y * stride);

        doBlt(par, info, &blt);
    
        info->shadow.timer.expires = jiffies+HZ/2;
        add_timer(&info->shadow.timer);

        //DPRINTK("delta jiffies = %ld\n", jiffies - j_start);
}
#endif


/* ------------------------------------------------------------------------- 
 *              Hardware independent part, interface to the world
 * ------------------------------------------------------------------------- */

static void
e1356_cfbX_clear_margins(struct vc_data* conp, struct display* p,
                         int bottom_only)
{
        blt_info_t blt;
        unsigned int cw=fontwidth(p);
        unsigned int ch=fontheight(p);
        unsigned int rw=p->var.xres % cw;
        unsigned int bh=p->var.yres % ch;
        unsigned int rs=p->var.xres - rw;
        unsigned int bs=p->var.yres - bh;

        //DPRINTK("\n");

        if (!bottom_only && rw) { 
                blt.dst_x = p->var.xoffset+rs;
                blt.dst_y = p->var.yoffset;
                blt.dst_height = p->var.yres;
                blt.dst_width = rw;
                blt.attribute = 0;
                blt.fg_color = 0;
                blt.operation = BLT_SOLID_FILL;
                doBlt (&fb_info.current_par, &fb_info, &blt);
        }
    
        if (bh) { 
                blt.dst_x = p->var.xoffset;
                blt.dst_y = p->var.yoffset+bs;
                blt.dst_height = bh;
                blt.dst_width = rs;
                blt.attribute = 0;
                blt.fg_color = 0;
                blt.operation = BLT_SOLID_FILL;
                doBlt (&fb_info.current_par, &fb_info, &blt);
        }
}

static void
e1356_cfbX_bmove(struct display* p, 
                 int sy, 
                 int sx, 
                 int dy,
                 int dx, 
                 int height, 
                 int width)
{
        blt_info_t blt;
    
        //DPRINTK("(%d,%d) to (%d,%d) size (%d,%d)\n", sx,sy,dx,dy,width,height);

        blt.src_x = fontwidth_x8(p)*sx;
        blt.src_y = fontheight(p)*sy;
        blt.dst_x = fontwidth_x8(p)*dx;
        blt.dst_y = fontheight(p)*dy;
        blt.src_height = blt.dst_height = fontheight(p)*height;
        blt.src_width = blt.dst_width = fontwidth_x8(p)*width;
        blt.attribute = 0;
        blt.rop = 0x0c;
        /*
         * The move BLT routine will actually decide between a pos/neg
         * move BLT. This is just so that the BLT dispatcher knows to
         * call the move BLT routine.
         */
        blt.operation = BLT_MOVE_POS_ROP;

        doBlt (&fb_info.current_par, &fb_info, &blt);
}

static void
e1356_cfb8_putc(struct vc_data* conp,
                struct display* p,
                int c, int yy,int xx)
{   
        blt_info_t blt;
        u32 fgx,bgx;
        u32 fw = fontwidth_x8(p);
        u32 fh = fontheight(p);
        u16 cs = (u16)c;

        fgx = attr_fgcol(p, c);
        bgx = attr_bgcol(p, c);

        blt.src_x = blt.src_y = 0;
        blt.attribute = 0;
        blt.dst_width = fw;
        blt.dst_height = fh;
        blt.dst_y = yy * fh;
        blt.dst_x = xx * fw;
        blt.bg_color = bgx;
        blt.fg_color = fgx;
        blt.operation = BLT_COLOR_EXP;
        blt.src = fb_info.putcs_buffer;
        fill_putcs_buffer(p, &blt, &cs, 1);

        doBlt(&fb_info.current_par, &fb_info, &blt);

}

static void
e1356_cfb16_putc(struct vc_data* conp,
                 struct display* p,
                 int c, int yy,int xx)
{   
        blt_info_t blt;
        u32 fgx,bgx;
        u32 fw = fontwidth_x8(p);
        u32 fh = fontheight(p);
        u16 cs = (u16)c;
    
        fgx = ((u16*)p->dispsw_data)[attr_fgcol(p,c)];
        bgx = ((u16*)p->dispsw_data)[attr_bgcol(p,c)];

        blt.src_x = blt.src_y = 0;
        blt.attribute = 0;
        blt.dst_width = fw;
        blt.dst_height = fh;
        blt.dst_y = yy * fh;
        blt.dst_x = xx * fw;
        blt.bg_color = bgx;
        blt.fg_color = fgx;
        blt.operation = BLT_COLOR_EXP;
        blt.src = fb_info.putcs_buffer;
        fill_putcs_buffer(p, &blt, &cs, 1);

        doBlt(&fb_info.current_par, &fb_info, &blt);
}


static void
e1356_cfb8_putcs(struct vc_data* conp,
                 struct display* p,
                 const unsigned short *s,int count,int yy,int xx)
{
        blt_info_t blt;
        u32 fgx,bgx;
        u32 fw = fontwidth_x8(p);
        u32 fh = fontheight(p);

        //DPRINTK("\n");

        fgx=attr_fgcol(p, *s);
        bgx=attr_bgcol(p, *s);

        blt.src_x = blt.src_y = 0;
        blt.attribute = 0;
        blt.dst_width = count * fw;
        blt.dst_height = fh;
        blt.dst_y = yy * fh;
        blt.dst_x = xx * fw;
        blt.bg_color = bgx;
        blt.fg_color = fgx;
        blt.operation = BLT_COLOR_EXP;
        blt.src = fb_info.putcs_buffer;
        fill_putcs_buffer(p, &blt, s, count);

        doBlt(&fb_info.current_par, &fb_info, &blt);
}

static void
e1356_cfb16_putcs(struct vc_data* conp,
                  struct display* p,
                  const unsigned short *s,int count,int yy,int xx)
{
        blt_info_t blt;
        u32 fgx,bgx;
        u32 fw = fontwidth_x8(p);
        u32 fh = fontheight(p);

        //DPRINTK("\n");

        fgx=((u16*)p->dispsw_data)[attr_fgcol(p,*s)];
        bgx=((u16*)p->dispsw_data)[attr_bgcol(p,*s)];

        blt.src_x = blt.src_y = 0;
        blt.attribute = 0;
        blt.dst_width = count * fw;
        blt.dst_height = fh;
        blt.dst_y = yy * fh;
        blt.dst_x = xx * fw;
        blt.bg_color = bgx;
        blt.fg_color = fgx;
        blt.operation = BLT_COLOR_EXP;
        blt.src = fb_info.putcs_buffer;
        fill_putcs_buffer(p, &blt, s, count);

        doBlt(&fb_info.current_par, &fb_info, &blt);
}


static void
e1356_cfb8_clear(struct vc_data* conp, 
                 struct display* p, 
                 int sy,
                 int sx, 
                 int height, 
                 int width)
{
        blt_info_t blt;
        u32 bg = attr_bgcol_ec(p,conp);

        //DPRINTK("(%d,%d) size (%d,%d)\n", sx,sy,width,height);

        blt.dst_x = fontwidth_x8(p)*sx;
        blt.dst_y = fontheight(p)*sy;
        blt.dst_height = fontheight(p)*height;
        blt.dst_width = fontwidth_x8(p)*width;
        blt.attribute = 0;
        blt.fg_color = bg;
        blt.operation = BLT_SOLID_FILL;

        doBlt (&fb_info.current_par, &fb_info, &blt);
}

static void
e1356_cfb16_clear(struct vc_data* conp, 
                  struct display* p, 
                  int sy,
                  int sx, 
                  int height, 
                  int width)
{
        blt_info_t blt;
        u32 bg = ((u16*)p->dispsw_data)[attr_bgcol_ec(p,conp)];

        //DPRINTK("(%d,%d) size (%d,%d)\n", sx,sy,width,height);

        blt.dst_x = fontwidth_x8(p)*sx;
        blt.dst_y = fontheight(p)*sy;
        blt.dst_height = fontheight(p)*height;
        blt.dst_width = fontwidth_x8(p)*width;
        blt.attribute = 0;
        blt.fg_color = bg;
        blt.operation = BLT_SOLID_FILL;

        doBlt (&fb_info.current_par, &fb_info, &blt);
}


static void
e1356_cfbX_revc(struct display *p, int xx, int yy)
{
        // not used if h/w cursor
        //DPRINTK("\n");
}

static void
e1356_cfbX_cursor(struct display *p, int mode, int x, int y) 
{
        unsigned long flags;
        struct fb_info_e1356 *info=(struct fb_info_e1356 *)p->fb_info;
        reg_inkcurs_t* inkcurs = (IS_PANEL(info->fix.disp_type)) ?
                info->reg.lcd_inkcurs : info->reg.crttv_inkcurs;
    
        //DPRINTK("\n");

        if (mode == CM_ERASE) {
                if (info->cursor.state != CM_ERASE) {
                        spin_lock_irqsave(&info->cursor.lock,flags);
                        info->cursor.state = CM_ERASE;
                        del_timer(&(info->cursor.timer));
                        writeb(0x00, &inkcurs->ctrl);
                        spin_unlock_irqrestore(&info->cursor.lock,flags);
                }
                return;
        }
    
        if ((p->conp->vc_cursor_type & CUR_HWMASK) != info->cursor.type)
                e1356fb_createcursor(p);
    
        x *= fontwidth_x8(p);
        y *= fontheight(p);
        x -= p->var.xoffset;
        y -= p->var.yoffset;
    
        spin_lock_irqsave(&info->cursor.lock,flags);
        if ((x != info->cursor.x) || (y != info->cursor.y) ||
            (info->cursor.redraw)) {
                info->cursor.x = x;
                info->cursor.y = y;
                info->cursor.redraw = 0;
                writeb(0x01, &inkcurs->ctrl);
                writew(x, &inkcurs->x_pos0);
                writew(y, &inkcurs->y_pos0);
                /* fix cursor color - XFree86 forgets to restore it properly */
                writeb(0x00, &inkcurs->blue0);
                writeb(0x00, &inkcurs->green0);
                writeb(0x00, &inkcurs->red0);
                writeb(0x1f, &inkcurs->blue1);
                writeb(0x3f, &inkcurs->green1);
                writeb(0x1f, &inkcurs->red1);
        }

        info->cursor.state = CM_DRAW;
        mod_timer(&info->cursor.timer, jiffies+HZ/2);
        spin_unlock_irqrestore(&info->cursor.lock,flags);
}

#ifdef FBCON_HAS_CFB8
static struct display_switch fbcon_e1356_8 = {
        setup:          fbcon_cfb8_setup, 
        bmove:          e1356_cfbX_bmove, 
        clear:          e1356_cfb8_clear, 
        putc:           e1356_cfb8_putc,
        putcs:          e1356_cfb8_putcs, 
        revc:           e1356_cfbX_revc,   
        cursor:         e1356_cfbX_cursor, 
        clear_margins:  e1356_cfbX_clear_margins,
        fontwidthmask:  FONTWIDTHRANGE(6,16)
};
#endif

#ifdef FBCON_HAS_CFB16
static struct display_switch fbcon_e1356_16 = {
        setup:          fbcon_cfb16_setup, 
        bmove:          e1356_cfbX_bmove, 
        clear:          e1356_cfb16_clear, 
        putc:           e1356_cfb16_putc,
        putcs:          e1356_cfb16_putcs, 
        revc:           e1356_cfbX_revc, 
        cursor:         e1356_cfbX_cursor, 
        clear_margins:  e1356_cfbX_clear_margins,
        fontwidthmask:  FONTWIDTHRANGE(6,16)
};
#endif

/* ------------------------------------------------------------------------- */

static void
e1356fb_set_par(const struct e1356fb_par* par,
                struct fb_info_e1356* info)
{
        reg_dispcfg_t* dispcfg=NULL;
        reg_dispmode_t* dispmode=NULL;
        u8* pclk_cfg=NULL;
        u8 width, hndp=0, hsync_start=0, hsync_width=0;
        u8 vndp, vsync_start, vsync_width=0, display_mode;
        u8 main_display_mode=0;
        u16 height, addr_offset;
        int disp_type = info->fix.disp_type;

        DPRINTK("%dx%d-%dbpp @ %d Hz, %d kHz hsync\n",
                par->width, par->height, par->bpp,
                par->vsync_freq, (((2*par->hsync_freq)/1000)+1)/2);
#ifdef E1356FB_VERBOSE_DEBUG
        dump_par(par);
#endif
    
        info->current_par = *par;

        width = (par->width >> 3) - 1;
        display_mode = (par->bpp == 8) ? 0x03 : 0x05;
        addr_offset = (par->width_virt * par->Bpp) / 2;
        vsync_start = (disp_type == DISP_TYPE_LCD) ? 0 : par->vsync_start - 1;
        height = par->height - 1;
        vndp = par->vert_ndp - 1;

        switch (disp_type) {
        case DISP_TYPE_LCD:
                dispcfg = info->reg.lcd_cfg;
                dispmode = info->reg.lcd_mode;
                pclk_cfg = &info->reg.clk_cfg->lcd_pclk_cfg;
                hndp = (par->horiz_ndp >> 3) - 1;
                hsync_start = 0;
                hsync_width = par->hsync_pol ? 0x00 : 0x80;
                vsync_width = par->vsync_pol ? 0x00 : 0x80;
                main_display_mode = 0x01;
                break;
        case DISP_TYPE_TFT:
                dispcfg = info->reg.lcd_cfg;
                dispmode = info->reg.lcd_mode;
                pclk_cfg = &info->reg.clk_cfg->lcd_pclk_cfg;
                hndp = (par->horiz_ndp >> 3) - 1;
                hsync_start = (par->bpp == 8) ?
                        (par->hsync_start - 4) >> 3 :
                                (par->hsync_start - 6) >> 3;
                hsync_width =
                        (par->hsync_pol ? 0x80 : 0x00) |
                        ((par->hsync_width >> 3) - 1);
                vsync_width =
                        (par->vsync_pol ? 0x80 : 0x00) |
                        (par->vsync_width - 1);
                main_display_mode = 0x01;
                break;
        case DISP_TYPE_CRT:
                dispcfg = info->reg.crttv_cfg;
                dispmode = info->reg.crttv_mode;
                pclk_cfg = &info->reg.clk_cfg->crttv_pclk_cfg;
                hndp = (par->horiz_ndp >> 3) - 1;
                hsync_start = (par->bpp == 8) ?
                        (par->hsync_start - 3) >> 3 :
                                (par->hsync_start - 5) >> 3;
                hsync_width =
                        (par->hsync_pol ? 0x80 : 0x00) |
                        ((par->hsync_width >> 3) - 1);
                vsync_width =
                        (par->vsync_pol ? 0x80 : 0x00) |
                        (par->vsync_width - 1);
                main_display_mode = 0x02;
                break;
        case DISP_TYPE_NTSC:
        case DISP_TYPE_PAL:
                dispcfg = info->reg.crttv_cfg;
                dispmode = info->reg.crttv_mode;
                pclk_cfg = &info->reg.clk_cfg->crttv_pclk_cfg;
                hndp = (disp_type == DISP_TYPE_PAL) ?
                        (par->horiz_ndp - 7) >> 3 :
                                (par->horiz_ndp - 6) >> 3;
                hsync_start = (par->bpp == 8) ?
                        (par->hsync_start + 7) >> 3 :
                                (par->hsync_start + 5) >> 3;
                hsync_width = 0;
                vsync_width = 0;
                main_display_mode = (info->fix.tv_filt & TV_FILT_FLICKER) ?
                        0x06 : 0x04;
                break;
        }

        // Blast the regs!
        // note: reset panning/scrolling (set start-addr and
        // pixel pan regs to 0). Panning is handled by pan_display.

        e1356_engine_wait_complete(info->reg.bitblt);

        // disable display while initializing
        writeb(0, &info->reg.misc->disp_mode);

        writeb(par->ipclk.pixclk_bits, pclk_cfg);

        writeb(width, &dispcfg->hdw);
        writeb(hndp, &dispcfg->hndp);
        writeb(hsync_start, &dispcfg->hsync_start);
        writeb(hsync_width, &dispcfg->hsync_pulse);
        writew(height, &dispcfg->vdh0);
        writeb(vndp, &dispcfg->vndp);
        writeb(vsync_start, &dispcfg->vsync_start);
        writeb(vsync_width, &dispcfg->vsync_pulse);

        writeb(display_mode, &dispmode->disp_mode);
        if (info->fix.mmunalign && info->mmaped)
                writeb(1, &dispmode->start_addr0);
        else
                writeb(0, &dispmode->start_addr0);
        writeb(0, &dispmode->start_addr1);
        writeb(0, &dispmode->start_addr2);
        writew(addr_offset, &dispmode->mem_addr_offset0);
        writeb(0, &dispmode->pixel_panning);

        // reset BitBlt engine
        e1356fb_engine_init(par, info);

#ifdef E1356FB_VERBOSE_DEBUG
        dump_display_regs(dispcfg, dispmode);
#endif

        /* clear out framebuffer memory */
        fbfill(fb_info.membase_virt, 0, fb_info.fb_size);
        // finally, enable display!
        writeb(main_display_mode, &info->reg.misc->disp_mode); 
}


static int
e1356fb_verify_timing(struct e1356fb_par* par,
                      const struct fb_info_e1356* info)
{
        int disp_type = info->fix.disp_type;

        // timing boundary checks
        if (par->horiz_ndp > max_hndp[disp_type]) {
                DPRINTK("horiz_ndp too big: %d\n", par->horiz_ndp);
                return -EINVAL;
        }
        if (par->vert_ndp > max_vndp[disp_type]) {
                DPRINTK("vert_ndp too big: %d\n", par->vert_ndp);
                return -EINVAL;
        }

        if (disp_type != DISP_TYPE_LCD) {
                if (par->hsync_start >
                    max_hsync_start[(par->bpp==16)][disp_type]) {
                        DPRINTK("hsync_start too big: %d\n",
                                par->hsync_start);
                        return -EINVAL;
                }
                if (par->vsync_start > max_vsync_start[disp_type]) {
                        DPRINTK("vsync_start too big: %d\n",
                                par->vsync_start);
                        return -EINVAL;
                }
                if (!IS_TV(disp_type)) {
                        if (par->hsync_width > max_hsync_width[disp_type]) {
                                DPRINTK("hsync_width too big: %d\n",
                                        par->hsync_width);
                                return -EINVAL;
                        }
                        if (par->vsync_width > max_vsync_width[disp_type]) {
                                DPRINTK("vsync_width too big: %d\n",
                                        par->vsync_width);
                                return -EINVAL;
                        }
                }
        }

        if (IS_TV(disp_type)) {
                int tv_pixclk = (disp_type == DISP_TYPE_NTSC) ?
                        NTSC_PIXCLOCK : PAL_PIXCLOCK;
                if (info->fix.tv_filt & TV_FILT_FLICKER)
                        tv_pixclk *= 2;
                
                if (par->ipclk.pixclk_d != tv_pixclk) {
                        DPRINTK("invalid TV pixel clock %u kHz\n",
                                par->ipclk.pixclk_d);
                        return -EINVAL;
                }
        }
        
        if (e1356_calc_pixclock(info, &par->ipclk) < 0) {
                DPRINTK("can't set pixel clock %u kHz\n",
                        par->ipclk.pixclk_d);
                return -EINVAL;
        }
 
#ifdef E1356FB_VERBOSE_DEBUG
        DPRINTK("desired pixclock = %d kHz, actual = %d kHz, error = %d%%\n",
                par->ipclk.pixclk_d, par->ipclk.pixclk, par->ipclk.error);
#endif
    
        if (disp_type != DISP_TYPE_LCD) {
                if (par->horiz_ndp < par->hsync_start + par->hsync_width) {
                        DPRINTK("invalid horiz. timing\n");
                        return -EINVAL;
                }
                if (par->vert_ndp < par->vsync_start + par->vsync_width) {
                        DPRINTK("invalid vert. timing\n");
                        return -EINVAL;
                }

                // SED1356 Hardware Functional Spec, section 13.5
                if (disp_type == DISP_TYPE_NTSC &&
                    ((par->width + par->horiz_ndp != 910) ||
                     (par->height + 2*par->vert_ndp+1 != 525))) {
                        DPRINTK("invalid NTSC timing\n");
                        return -EINVAL;
                } else if (disp_type == DISP_TYPE_PAL &&
                           ((par->width + par->horiz_ndp != 1135) ||
                            (par->height + 2*par->vert_ndp+1 != 625))) {
                        DPRINTK("invalid PAL timing\n");
                        return -EINVAL;
                }
        }
    
        par->hsync_freq = (1000 * par->ipclk.pixclk) /
                (par->width + par->horiz_ndp);
        par->vsync_freq = par->hsync_freq / (par->height + par->vert_ndp);
        
        if (par->hsync_freq < 30000 || par->hsync_freq > 90000) {
                DPRINTK("hsync freq too %s: %u Hz\n",
                        par->hsync_freq < 30000 ? "low" : "high",
                        par->hsync_freq);
                return -EINVAL;
        }
        if (par->vsync_freq < 50 || par->vsync_freq > 110) {
                DPRINTK("vsync freq too %s: %u Hz\n",
                        par->vsync_freq < 50 ? "low" : "high",
                        par->vsync_freq);
                return -EINVAL;
        }

        return 0;
}

static int
e1356fb_verify_par(struct e1356fb_par* par,
                   const struct fb_info_e1356* info)
{
        int disp_type = info->fix.disp_type;
    
        if (par->bpp != 8 && par->bpp != 16) {
                DPRINTK("depth not supported: %u bpp\n", par->bpp);
                return -EINVAL;
        }

        if (par->width > par->width_virt) {
                DPRINTK("virtual x resolution < physical x resolution not possible\n");
                return -EINVAL;
        }

        if (par->height > par->height_virt) {
                DPRINTK("virtual y resolution < physical y resolution not possible\n");
                return -EINVAL;
        }

        if (par->width < 320 || par->width > 1024) {
                DPRINTK("width not supported: %u\n", par->width);
                return -EINVAL;
        }

        if ((disp_type == DISP_TYPE_LCD && (par->width % 16)) ||
            (disp_type == DISP_TYPE_TFT && (par->width % 8))) {
                DPRINTK("invalid width for panel type: %u\n", par->width);
                return -EINVAL;
        }

        if (par->height < 200 || par->height > 1024) {
                DPRINTK("height not supported: %u\n", par->height);
                return -EINVAL;
        }

        if (par->width_virt * par->height_virt * par->Bpp >
            info->fb_size) {
                DPRINTK("not enough memory for virtual screen (%ux%ux%u)\n",
                        par->width_virt, par->height_virt, par->bpp);
                return -EINVAL;
        }

        return e1356fb_verify_timing(par, info);
}


static int
e1356fb_var_to_par(const struct fb_var_screeninfo* var,
                   struct e1356fb_par* par,
                   const struct fb_info_e1356* info)
{
        if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
                DPRINTK("interlace not supported\n");
                return -EINVAL;
        }

        memset(par, 0, sizeof(struct e1356fb_par));

        par->width       = (var->xres + 15) & ~15; /* could sometimes be 8 */
        par->width_virt  = var->xres_virtual;
        par->height      = var->yres;
        par->height_virt = var->yres_virtual;
        par->bpp         = var->bits_per_pixel;
        par->Bpp         = (par->bpp + 7) >> 3;

        par->ipclk.pixclk_d = PICOS2KHZ(var->pixclock);

        par->hsync_start = var->right_margin;
        par->hsync_width = var->hsync_len;

        par->vsync_start = var->lower_margin;
        par->vsync_width = var->vsync_len;

        par->horiz_ndp = var->left_margin + var->right_margin + var->hsync_len;
        par->vert_ndp = var->upper_margin + var->lower_margin + var->vsync_len;

        par->hsync_pol = (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 1 : 0;
        par->vsync_pol = (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 1 : 0;

        par->cmap_len  = (par->bpp == 8) ? 256 : 16;

        return e1356fb_verify_par(par, info);
}

static int
e1356fb_par_to_var(struct fb_var_screeninfo* var,
                   struct e1356fb_par* par,
                   const struct fb_info_e1356* info)
{
        struct fb_var_screeninfo v;
        int ret;
    
        // First, make sure par is valid.
        if ((ret = e1356fb_verify_par(par, info)))
                return ret;

        memset(&v, 0, sizeof(struct fb_var_screeninfo));
        v.xres_virtual   = par->width_virt;
        v.yres_virtual   = par->height_virt;
        v.xres           = par->width;
        v.yres           = par->height;
        v.right_margin   = par->hsync_start;
        v.hsync_len      = par->hsync_width;
        v.left_margin    = par->horiz_ndp - par->hsync_start - par->hsync_width;
        v.lower_margin   = par->vsync_start;
        v.vsync_len      = par->vsync_width;
        v.upper_margin   = par->vert_ndp - par->vsync_start - par->vsync_width;
        v.bits_per_pixel = par->bpp;

        switch(par->bpp) {
        case 8:
                v.red.offset = v.green.offset = v.blue.offset = 0;
                v.red.length = v.green.length = v.blue.length = 4;
                break;
        case 16:
                v.red.offset   = 11;
                v.red.length   = 5;
                v.green.offset = 5;
                v.green.length = 6;
                v.blue.offset  = 0;
                v.blue.length  = 5;
                break;
        }

        v.height = v.width = -1;
        v.pixclock = KHZ2PICOS(par->ipclk.pixclk);

        if (par->hsync_pol)
                v.sync |= FB_SYNC_HOR_HIGH_ACT;
        if (par->vsync_pol)
                v.sync |= FB_SYNC_VERT_HIGH_ACT;

        *var = v;
        return 0;
}

static int
e1356fb_encode_fix(struct fb_fix_screeninfo*  fix,
                   const struct e1356fb_par*   par,
                   const struct fb_info_e1356* info)
{
        memset(fix, 0, sizeof(struct fb_fix_screeninfo));
    
        strcpy(fix->id, "Epson SED1356");
        fix->smem_start  = info->fix.membase_phys;
        fix->smem_len    = info->fb_size;
        fix->mmio_start  = info->fix.regbase_phys;
        fix->mmio_len    = info->regbase_size;
        fix->accel       = FB_ACCEL_EPSON_SED1356;
        fix->type        = FB_TYPE_PACKED_PIXELS;
        fix->type_aux    = 0;
        fix->line_length = par->width_virt * par->Bpp;
        fix->visual      =
                (par->bpp == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
    
        fix->xpanstep    = info->fix.nopan ? 0 : 1;
        fix->ypanstep    = info->fix.nopan ? 0 : 1;
        fix->ywrapstep   = 0;
    
        return 0;
}

static int e1356fb_open(struct fb_info *fb, int user)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        if (user) {
                info->open++;
        }
        MOD_INC_USE_COUNT;
        return 0;
}

static int e1356fb_release(struct fb_info *fb, int user)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        if (user && info->open) {
                info->open--;
                if (info->open == 0)
                        info->mmaped = 0;
        }
        MOD_DEC_USE_COUNT;
        return 0;
}

static int
e1356fb_get_fix(struct fb_fix_screeninfo *fix, 
                int con,
                struct fb_info *fb)
{
        const struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        struct e1356fb_par par;

        //DPRINTK("\n");

        if (con == -1)
                par = info->current_par;
        else
                e1356fb_var_to_par(&fb_display[con].var, &par, info);
        e1356fb_encode_fix(fix, &par, info);
        return 0;
}

static int
e1356fb_get_var(struct fb_var_screeninfo *var, 
                int con,
                struct fb_info *fb)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;

        //DPRINTK("\n");

        if (con == -1)
                e1356fb_par_to_var(var, &info->current_par, info);
        else
                *var = fb_display[con].var;
        return 0;
}
 
static void
e1356fb_set_dispsw(struct display *disp, 
                   struct fb_info_e1356 *info,
                   int bpp, 
                   int accel)
{
        struct e1356fb_fix* fix = &info->fix;
        //DPRINTK("\n");

        if (disp->dispsw && disp->conp) 
                fb_con.con_cursor(disp->conp, CM_ERASE);
        switch (bpp) {
#ifdef FBCON_HAS_CFB8
        case 8:
                disp->dispsw = fix->noaccel ? &fbcon_cfb8 : &fbcon_e1356_8;
                if (fix->nohwcursor)
                        fbcon_e1356_8.cursor = NULL;
                break;
#endif
#ifdef FBCON_HAS_CFB16
        case 16:
                disp->dispsw = fix->noaccel ? &fbcon_cfb16 : &fbcon_e1356_16;
                disp->dispsw_data = info->fbcon_cmap16;
                if (fix->nohwcursor)
                        fbcon_e1356_16.cursor = NULL;
                break;
#endif
        default:
                disp->dispsw = &fbcon_dummy;
        }
   
}

static int
e1356fb_set_var(struct fb_var_screeninfo *var, 
                int con,
                struct fb_info *fb)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        struct e1356fb_par par;
        struct display *display;
        int oldxres, oldyres, oldvxres, oldvyres, oldbpp, oldaccel, accel, err;
        int activate = var->activate;
        int j,k;
    
        DPRINTK("\n");
        
        if (con >= 0)
                display = &fb_display[con];
        else
                display = fb->disp;     /* used during initialization */
   
        if ((err = e1356fb_var_to_par(var, &par, info))) {
                struct fb_videomode *dm;
                /*
                 * this mode didn't pass the tests. Try the
                 * corresponding mode from our own modedb.
                 */
                DPRINTK("req mode failed, trying SED1356 %dx%d mode\n",
                        var->xres, var->yres);
                if (e1356fb_get_mode(info, var->xres,
                                     var->yres, NULL, &dm) < 0) {
                        DPRINTK("no SED1356 %dx%d mode found, failed\n",
                                var->xres, var->yres);
                        return err;
                }
                fb_videomode_to_var(dm, var);
                if ((err = e1356fb_var_to_par(var, &par, info))) {
                        DPRINTK("SED1356 %dx%d mode failed\n",
                                var->xres, var->yres);
                        return err;
                }
        }
        
        if (info->fix.tv_filt & TV_FILT_FLICKER)
                printk("e1356fb: TV flicker filter enabled\n");
    
        e1356fb_par_to_var(var, &par, info);
   
        if ((activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
                oldxres  = display->var.xres;
                oldyres  = display->var.yres;
                oldvxres = display->var.xres_virtual;
                oldvyres = display->var.yres_virtual;
                oldbpp   = display->var.bits_per_pixel;
                oldaccel = display->var.accel_flags;
                display->var = *var;
                if (con < 0                         ||
                    oldxres  != var->xres           || 
                    oldyres  != var->yres           ||
                    oldvxres != var->xres_virtual   || 
                    oldvyres != var->yres_virtual   ||
                    oldbpp   != var->bits_per_pixel || 
                    oldaccel != var->accel_flags) {
                        struct fb_fix_screeninfo fix;
            
                        e1356fb_encode_fix(&fix, &par, info);
                        display->screen_base    = info->membase_virt;
                        display->visual         = fix.visual;
                        display->type           = fix.type;
                        display->type_aux       = fix.type_aux;
                        display->ypanstep       = fix.ypanstep;
                        display->ywrapstep      = fix.ywrapstep;
                        display->line_length    = fix.line_length;
                        display->next_line      = fix.line_length;
                        display->can_soft_blank = 1;
                        display->inverse        = 0;
                        accel = var->accel_flags & FB_ACCELF_TEXT;
                        e1356fb_set_dispsw(display, info, par.bpp, accel);
         
                        if (info->fix.nopan)
                                display->scrollmode = SCROLL_YREDRAW;
        
                        if (info->fb_info.changevar)
                                (*info->fb_info.changevar)(con);
                }
                if (var->bits_per_pixel==8)
                        for(j = 0; j < 16; j++) {
                                k = color_table[j];
                                fb_info.palette[j].red   = default_red[k];
                                fb_info.palette[j].green = default_grn[k];
                                fb_info.palette[j].blue  = default_blu[k];
                        }
      
                del_timer(&(info->cursor.timer)); 
                fb_info.cursor.state=CM_ERASE;
        
                if (!info->fb_info.display_fg ||
                    info->fb_info.display_fg->vc_num == con || con < 0)
                        e1356fb_set_par(&par, info);

                if (!info->fix.nohwcursor) 
                        if (display && display->conp)
                                e1356fb_createcursor( display );
                info->cursor.redraw = 1;

                if (oldbpp != var->bits_per_pixel || con < 0) {
                        if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
                                return err;
                        e1356fb_install_cmap(display, &(info->fb_info));
                }
        }
  
        return 0;
}

static int
e1356fb_pan_display(struct fb_var_screeninfo* var, 
                    int con,
                    struct fb_info* fb)
{
        struct fb_info_e1356* info = (struct fb_info_e1356*)fb;
        struct e1356fb_par* par = &info->current_par;
    
        //DPRINTK("\n");

        if (info->fix.nopan)
                return -EINVAL;

        if ((int)var->xoffset < 0 ||
            var->xoffset + par->width > par->width_virt ||
            (int)var->yoffset < 0 ||
            var->yoffset + par->height > par->height_virt)
                return -EINVAL;
    
        if (con == currcon)
                do_pan_var(var, info);
    
        fb_display[con].var.xoffset = var->xoffset;
        fb_display[con].var.yoffset = var->yoffset; 

        return 0;
}

static int
e1356fb_get_cmap(struct fb_cmap *cmap, 
                 int kspc, 
                 int con,
                 struct fb_info *fb)
{
        struct fb_info_e1356* info = (struct fb_info_e1356*)fb;
        struct display *d = (con<0) ? fb->disp : fb_display + con;
   
        //DPRINTK("\n");

        if (con == currcon) {
                /* current console? */
                return fb_get_cmap(cmap, kspc, e1356fb_getcolreg, fb);
        } else if (d->cmap.len) {
                /* non default colormap? */
                fb_copy_cmap(&d->cmap, cmap, kspc ? 0 : 2);
        } else {
                fb_copy_cmap(fb_default_cmap(info->current_par.cmap_len),
                             cmap, kspc ? 0 : 2);
        }

        return 0;
}

static int
e1356fb_set_cmap(struct fb_cmap *cmap, 
                 int kspc, 
                 int con,
                 struct fb_info *fb)
{
        struct display *d = (con<0) ? fb->disp : fb_display + con;
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        int cmap_len = (info->current_par.bpp == 8) ? 256 : 16;

        //DPRINTK("\n");

        if (d->cmap.len!=cmap_len) {
                int err;
                if ((err = fb_alloc_cmap(&d->cmap, cmap_len, 0)))
                        return err;
        }
    
        if (con == currcon) {
                /* current console? */
                return fb_set_cmap(cmap, kspc, e1356fb_setcolreg, fb);
        } else {
                fb_copy_cmap(cmap, &d->cmap, kspc ? 0 : 1);
        }
        return 0;
}

static int
e1356fb_ioctl(struct inode *inode, 
              struct file *file, 
              u_int cmd,
              u_long arg, 
              int con, 
              struct fb_info *fb)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        blt_info_t blt;
        u16* src = NULL;
        int ret=0;
    
        switch (cmd) {
        case FBIO_SED1356_BITBLT:
                if (copy_from_user(&blt, (void *)arg, sizeof(blt_info_t)))
                        return -EFAULT;
                if (blt.src) {
                        if ((ret = verify_area(VERIFY_READ,
                                               (void*)blt.src, blt.srcsize)))
                                return ret;
                        if ((src = (u16*)kmalloc(blt.srcsize,
                                                 GFP_KERNEL)) == NULL)
                                return -ENOMEM;
                        if (copy_from_user(src, (void *)blt.src, blt.srcsize))
                                return -EFAULT;
                        blt.src = src;
                }
                ret = doBlt(&info->current_par, info, &blt);
                if (src)
                        kfree(src);
                break;
        default:
                return -EINVAL;
        }

        return ret;
}


static int
e1356fb_mmap(struct fb_info *fb,
             struct file *file,
             struct vm_area_struct *vma)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        unsigned int len;
        phys_t start=0, off;

        if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) {
                DPRINTK("invalid vma->vm_pgoff\n");
                return -EINVAL;
        }
    
#ifdef SHADOW_FRAME_BUFFER
        if (!info->shadow.fb) {
                int order = 0;
                while (info->fb_size > (PAGE_SIZE * (1 << order)))
                        order++;
                info->shadow.fb = (void*)__get_free_pages(GFP_KERNEL, order);
                if (!info->shadow.fb) {
                        DPRINTK("shadow fb alloc failed\n");
                        return -ENXIO;
                }
                memset(info->shadow.fb, 0, info->fb_size);
                init_timer(&info->shadow.timer);
                info->shadow.timer.function = do_write_shadow_fb;
                info->shadow.timer.data = (unsigned long)info;
        }
        mod_timer(&info->shadow.timer, jiffies+HZ/2);
        start = virt_to_phys(info->shadow.fb) & PAGE_MASK;
#else
        start = info->fix.membase_phys & PAGE_MASK;
#endif

        len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fb_size);

        off = vma->vm_pgoff << PAGE_SHIFT;
    
        if ((vma->vm_end - vma->vm_start + off) > len) {
                DPRINTK("invalid vma\n");
                return -EINVAL;
        }

        off += start;
        vma->vm_pgoff = off >> PAGE_SHIFT;

        pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
#ifdef SHADOW_FRAME_BUFFER
        vma->vm_flags |= VM_RESERVED;
        pgprot_val(vma->vm_page_prot) &= ~_CACHE_UNCACHED;
#else
        pgprot_val(vma->vm_page_prot) |= _CACHE_UNCACHED;
#endif

        /* This is an IO map - tell maydump to skip this VMA */
        vma->vm_flags |= VM_IO;
        // FIXME: shouldn't have to do this. If the pages are marked writeable,
        // the TLB fault handlers should set these.
        pgprot_val(vma->vm_page_prot) |= (_PAGE_DIRTY | _PAGE_VALID);
    
        /*
         * The SED1356 has only a 16-bit wide data bus, and some
         * embedded platforms, such as the Pb1000, do not automatically
         * split 32-bit word accesses to the framebuffer into
         * seperate half-word accesses. Hence the upper half-word
         * never gets to the framebuffer. The following solution is
         * to intentionally return a non-32-bit-aligned VA. As long
         * as the user app assumes (and doesn't check) that the returned
         * VA is 32-bit aligned, all (assumed aligned) 32-bit accesses
         * will actually be unaligned and will get trapped by the MIPS
         * unaligned exception handler. This handler will emulate the
         * load/store instructions by splitting up the load/store
         * into two 16-bit load/stores. (This emulation is currently
         * enabled by default, but may be disabled in the future, when
         * alignment problems in user-level programs get fixed. When
         * that happens, this solution won't work anymore, unless the
         * process that mmap's the fb also calls sysmips(MIPS_FIXADE, 1),
         * which turns address-error emulation back on).
         *
         * Furthermore, this solution only seems to work for TinyX
         * (Xfbdev). Others, like Qt/E, do snoop the returned VA
         * and compensate, or do originally unaligned 32-bit accesses
         * which then become aligned, hence breaking this solution.
         */
        if (info->fix.mmunalign)
                vma->vm_start += 2;
        
        if (io_remap_page_range(vma->vm_start, off,
                                vma->vm_end - vma->vm_start,
                                vma->vm_page_prot))
                return -EAGAIN;

        info->mmaped = 1;
        return 0;
}


int __init
e1356fb_init(void)
{
        struct fb_var_screeninfo var;
        struct e1356fb_fix * epfix = &fb_info.fix;
        e1356_reg_t* reg;
        void* regbase;
        char* name = "SED1356";
        int periodMCLK, periodBCLK;
        int dram_timing, rr_div, mclk_src;
        u8 rev_code, btmp, mclk_cfg;

        if (options) {
                e1356fb_setup(options, 0);
        }

        // clear out fb_info
        memset(&fb_info, 0, sizeof(struct fb_info_e1356));

        // copy boot options
        fb_info.fix = boot_fix;
        fb_info.default_par = boot_par;

        fb_info.regbase_size = E1356_REG_SIZE;

        if (!epfix->system) {
                printk(KERN_ERR "e1356/86fb: no valid system found\n");
                return -ENODEV;
        }

        if (epfix->system == SYS_SDU1356) {
                // it's the SDU1356B0C PCI eval card.
                struct pci_dev *pdev = NULL;
                if (!pci_present())   /* No PCI bus in this machine! */
                        return -ENODEV;
                if (!(pdev = pci_find_device(PCI_VENDOR_ID_EPSON,
                                             PCI_DEVICE_ID_EPSON_SDU1356, pdev)))
                        return -ENODEV;
                if (pci_enable_device(pdev))
                        return -ENODEV;
                epfix->regbase_phys = pci_resource_start(pdev, 0);
                epfix->membase_phys = epfix->regbase_phys + E1356_REG_SIZE;
        }
        
        fb_info.regbase_virt = ioremap_nocache(epfix->regbase_phys,
                                               E1356_REG_SIZE);

        if (!fb_info.regbase_virt) {
                printk("e1356fb: Can't remap %s register area.\n", name);
                return -ENXIO;
        }

        regbase = fb_info.regbase_virt;
        reg = &fb_info.reg;
    
        // Initialize the register pointers
        reg->basic =         (reg_basic_t*)   (regbase + REG_BASE_BASIC);
        reg->genio =         (reg_genio_t*)   (regbase + REG_BASE_GENIO);
        reg->md_cfg =        (reg_mdcfg_t*)   (regbase + REG_BASE_MDCFG);
        reg->clk_cfg =       (reg_clkcfg_t*)  (regbase + REG_BASE_CLKCFG);
        reg->mem_cfg =       (reg_memcfg_t*)  (regbase + REG_BASE_MEMCFG);
        reg->panel_cfg =     (reg_panelcfg_t*)(regbase + REG_BASE_PANELCFG);
        reg->lcd_cfg =       (reg_dispcfg_t*) (regbase + REG_BASE_LCD_DISPCFG);
        reg->crttv_cfg =     (reg_dispcfg_t*) (regbase + REG_BASE_CRTTV_DISPCFG);
        reg->lcd_mode =      (reg_dispmode_t*)(regbase + REG_BASE_LCD_DISPMODE);
        reg->crttv_mode =    (reg_dispmode_t*)(regbase + REG_BASE_CRTTV_DISPMODE);
        reg->lcd_inkcurs =   (reg_inkcurs_t*) (regbase + REG_BASE_LCD_INKCURS);
        reg->crttv_inkcurs = (reg_inkcurs_t*) (regbase + REG_BASE_CRTTV_INKCURS);
        reg->bitblt =        (reg_bitblt_t*)  (regbase + REG_BASE_BITBLT);
        reg->lut =           (reg_lut_t*)     (regbase + REG_BASE_LUT);
        reg->pwr_save =      (reg_pwrsave_t*) (regbase + REG_BASE_PWRSAVE);
        reg->misc =          (reg_misc_t*)    (regbase + REG_BASE_MISC);
        reg->mediaplug =     (reg_mediaplug_t*)(regbase + REG_BASE_MEDIAPLUG);
        reg->bitblt_data =   (u16*)           (regbase + REG_BASE_BITBLT_DATA);
    
        // Enable all register access
        writeb(0, &reg->basic->misc);

        rev_code = readb(&reg->basic->rev_code);
        if ((rev_code >> 2) == 0x04) {
                printk("Found EPSON1356 Display Controller\n");
        }
        else if ((rev_code >> 2) == 0x07) {
                printk("Found EPSON13806 Display Controller\n");
        }
        else {
                iounmap(fb_info.regbase_virt);
                printk("e1356/806fb: %s not found, rev_code=0x%02x.\n",
                       name, rev_code);
                return -ENODEV;
        }

        fb_info.chip_rev = rev_code & 0x03;

        // Determine frame-buffer size
        switch (readb(&reg->md_cfg->md_cfg_stat0) >> 6) {
        case 0:
        case 2:
                fb_info.fb_size = 0x80000;   /* 512K bytes */
                break;
        case 1:
                if ((rev_code >> 2) == 7) /* 806 */
                        fb_info.fb_size = 0x140000;  /* 1.2M bytes */
                else
                        fb_info.fb_size = 0x200000;  /* 2M bytes */
                break;
        default:
                fb_info.fb_size = 0x200000;  /* 2M bytes */
                break;
        }

        fb_info.membase_virt = ioremap_nocache(epfix->membase_phys,
                                               fb_info.fb_size);
    
        if (!fb_info.membase_virt) {
                printk("e1356fb: Can't remap %s framebuffer.\n", name);
                iounmap(fb_info.regbase_virt);
                return -ENXIO;
        }
    
        printk("e1356/806fb: Detected  %dKB framebuffer\n", 
                        (unsigned)fb_info.fb_size/1000);

#ifdef CONFIG_MTRR
        if (!epfix->nomtrr) {
                fb_info.mtrr_idx = mtrr_add(epfix->membase_phys, fb_info.fb_size,
                                            MTRR_TYPE_WRCOMB, 1);
                printk("e1356fb: MTRR's turned on\n");
        }
#endif
    
        if (!boot_fix.noaccel) {
                /*
                  Allocate a page for string BLTs. A 4K page is
                  enough for a 256 character string at an 8x16 font.
                */
                fb_info.putcs_buffer = (void*)__get_free_pages(GFP_KERNEL, 0);
                if (fb_info.putcs_buffer == NULL) {
                        printk("e1356fb: Can't allocate putcs buffer\n");
                        goto unmap_ret_enxio;
                }
        }

        // Begin SED1356 initialization

        // disable display while initializing
        writeb(0, &reg->misc->disp_mode);
        // Set the GPIO1 and 2 to inputs
        writeb(0, &reg->genio->gpio_cfg);
        writeb(0, &reg->genio->gpio_ctrl);
        if (fb_info.chip_rev == 7) /* 806 */
                writeb(0, &reg->genio->gpio_ctrl2);

        /*
         * Program the clocks
         */

#ifdef CONFIG_SOC_AU1X00
        if ((epfix->system == SYS_PB1000) || (epfix->system == SYS_PB1500))
                epfix->busclk = get_au1x00_lcd_clock();
#endif
        
        if (epfix->busclk > 80000) {
                printk("e1356fb: specified busclk too high\n");
                goto ret_enxio;
        }

        epfix->mclk = mclk_cfg = 0;
        if (epfix->system == SYS_PB1500) {
                epfix->mclk = epfix->busclk;
                mclk_cfg = 0x01;
        }
        else {
                // Find the highest allowable MCLK
                if (epfix->busclk <= MAX_PIXCLOCK && 
                                epfix->busclk > epfix->mclk) {
                        epfix->mclk = epfix->busclk;
                        mclk_cfg = 0x01;
                }
                if (epfix->clki <= MAX_PIXCLOCK && epfix->clki > epfix->mclk) {
                        epfix->mclk = epfix->clki;
                        mclk_cfg = 0x00;
                }
                if (epfix->busclk/2 <= MAX_PIXCLOCK && 
                                epfix->busclk/2 > epfix->mclk) {
                        epfix->mclk = epfix->busclk/2;
                        mclk_cfg = 0x11;
                }
                if (epfix->clki/2 <= MAX_PIXCLOCK && 
                                epfix->clki/2 > epfix->mclk) {
                        epfix->mclk = epfix->clki/2;
                        mclk_cfg = 0x10;
                }
        }
        
        if (!epfix->mclk) {
                printk("e1356fb: couldn't find an allowable MCLK!\n");
                goto ret_enxio;
        }

        // When changing mclk src, you must first set bit 4 to 1.
        writeb(readb(&reg->clk_cfg->mem_clk_cfg) | 0x10,
               &reg->clk_cfg->mem_clk_cfg);
        writeb(mclk_cfg, &reg->clk_cfg->mem_clk_cfg);

        printk("e1356fb: clocks (kHz): busclk=%d mclk=%d clki=%d clki2=%d\n",
               epfix->busclk, epfix->mclk, epfix->clki, epfix->clki2);

        // Set max pixel clock
        switch (epfix->disp_type) {
        case DISP_TYPE_LCD:
        case DISP_TYPE_TFT:
        case DISP_TYPE_CRT:
                fb_info.max_pixclock = epfix->mclk;
                break;
        case DISP_TYPE_NTSC:
        case DISP_TYPE_PAL:
                fb_info.max_pixclock = (epfix->disp_type == DISP_TYPE_NTSC) ?
                        NTSC_PIXCLOCK : PAL_PIXCLOCK;
                if (epfix->tv_filt & TV_FILT_FLICKER)
                        fb_info.max_pixclock *= 2;
                break;
        default:
                printk("e1356fb: invalid specified display type\n");
                goto ret_enxio;
        }

        periodMCLK = 1000000L / epfix->mclk;   // in nano-seconds
        periodBCLK = 1000000L / epfix->busclk; // in nano-seconds
        if (readb(&reg->md_cfg->md_cfg_stat1) & (1<<4))
                periodBCLK *= 2;
    
        if ((epfix->system == SYS_PB1000) || (epfix->system == SYS_PB1500))
                writeb(0x00, &reg->clk_cfg->cpu2mem_wait_sel);
        else if (periodMCLK - 4 > periodBCLK)
                writeb(0x02, &reg->clk_cfg->cpu2mem_wait_sel);
        else if (2*periodMCLK - 4 > periodBCLK)
                writeb(0x01, &reg->clk_cfg->cpu2mem_wait_sel);
        else
                writeb(0x00, &reg->clk_cfg->cpu2mem_wait_sel);

        // Program memory config
        if (epfix->mem_type < MEM_TYPE_EDO_2CAS ||
            epfix->mem_type > MEM_TYPE_EMBEDDED_SDRAM) {
                printk("e1356fb: bad memory type specified\n");
                goto ret_enxio;
        }
        writeb((u8)epfix->mem_type, &reg->mem_cfg->mem_cfg);

        // calc closest refresh rate
        rr_div = 7;
        mclk_src = (mclk_cfg & 1) ? epfix->busclk : epfix->clki;
        while ((mclk_src >> (6 + rr_div)) < epfix->mem_refresh)
                if (--rr_div < 0) {
                        printk("e1356fb: can't set specified refresh rate\n");
                        goto ret_enxio;
                }
    
        DPRINTK("refresh rate = %d kHz\n", (mclk_src >> (6 + rr_div)));

        // add Suspend-Mode Refresh bits
        if (epfix->mem_smr < MEM_SMR_CBR || epfix->mem_smr > MEM_SMR_NONE) {
                printk("e1356fb: invalid specified suspend-mode refresh type\n");
                goto ret_enxio;
        }
        writeb(rr_div | (epfix->mem_smr << 6), &reg->mem_cfg->dram_refresh);

        // set DRAM speed
        switch (epfix->mem_speed) {
        case 50:
                dram_timing = epfix->mclk >= 33000 ? 0x0101 : 0x0212;
                break;
        case 60:
                if (epfix->mclk >= 30000)
                        dram_timing = 0x0101;
                else if (epfix->mclk >= 25000)
                        dram_timing =
                                (epfix->mem_type == MEM_TYPE_EDO_2CAS ||
                                 epfix->mem_type == MEM_TYPE_EDO_2WE) ?
                                0x0212 : 0x0101;
                else
                        dram_timing = 0x0212;
                break;
        case 70:
                if (epfix->mclk >= 30000)
                        dram_timing = 0x0000;
                else if (epfix->mclk >= 25000)
                        dram_timing = 0x0101;
                else
                        dram_timing =
                                (epfix->mem_type == MEM_TYPE_EDO_2CAS ||
                                 epfix->mem_type == MEM_TYPE_EDO_2WE) ?
                                0x0212 : 0x0211;
                break;
        case 80:
                if (epfix->mclk >= 25000)
                        dram_timing = 0x0100;
                else
                        dram_timing = 0x0101;
                break;
        default:
                printk("e1356fb: invalid specified memory speed\n");
                goto ret_enxio;
        }

        writew(dram_timing, &reg->mem_cfg->dram_timings_ctrl0);
    
        currcon = -1;
        if (!epfix->nohwcursor)
                e1356fb_hwcursor_init(&fb_info);
    
        init_timer(&fb_info.cursor.timer);
        fb_info.cursor.timer.function = do_flashcursor; 
        fb_info.cursor.timer.data = (unsigned long)(&fb_info);
        fb_info.cursor.state = CM_ERASE;
        spin_lock_init(&fb_info.cursor.lock);
    
        strcpy(fb_info.fb_info.modename, "Epson "); 
        strcat(fb_info.fb_info.modename, name);
        fb_info.fb_info.changevar  = NULL;
        fb_info.fb_info.node       = -1;

        fb_info.fb_info.fbops      = &e1356fb_ops;
        fb_info.fb_info.disp       = &fb_info.disp;
        strcpy(fb_info.fb_info.fontname, epfix->fontname);
        fb_info.fb_info.switch_con = &e1356fb_switch_con;
        fb_info.fb_info.updatevar  = &e1356fb_updatevar;
        fb_info.fb_info.blank      = &e1356fb_blank;
        fb_info.fb_info.flags      = FBINFO_FLAG_DEFAULT;
    
        // Set-up display
        // clear out unused stuff
        writeb(0, &reg->panel_cfg->mod_rate);
        writeb(0x01, &reg->lcd_mode->lcd_misc);
        writeb(0, &reg->lcd_mode->fifo_high_thresh);
        writeb(0, &reg->lcd_mode->fifo_low_thresh);
        writeb(0, &reg->crttv_mode->fifo_high_thresh);
        writeb(0, &reg->crttv_mode->fifo_low_thresh);
    
        switch (epfix->disp_type) {
        case DISP_TYPE_LCD:
                switch (epfix->panel_width) {
                case 4: btmp = (u8)(((epfix->panel_el & 1)<<7) | 0x04); break;
                case 8: btmp = (u8)(((epfix->panel_el & 1)<<7) | 0x14); break;
                case 16: btmp = (u8)(((epfix->panel_el & 1)<<7) | 0x24); break;
                default:
                        printk("e1356fb: invalid specified LCD panel data width\n");
                        goto ret_enxio;
                }
                writeb(btmp, &reg->panel_cfg->panel_type);
                break;
        case DISP_TYPE_TFT:
                switch (epfix->panel_width) {
                case 9: btmp = (u8)(((epfix->panel_el & 1)<<7) | 0x05); break;
                case 12: btmp = (u8)(((epfix->panel_el & 1)<<7) | 0x15); break;
                case 18: btmp = (u8)(((epfix->panel_el & 1)<<7) | 0x25); break;
                default:
                        printk("e1356fb: invalid specified TFT panel data width\n");
                        goto ret_enxio;
                }
                writeb(btmp, &reg->panel_cfg->panel_type);
                break;
        case DISP_TYPE_CRT:
                writeb(0x00, &reg->crttv_cfg->tv_output_ctrl);
                break;
        case DISP_TYPE_NTSC:
        case DISP_TYPE_PAL:
                if (epfix->tv_fmt < TV_FMT_COMPOSITE ||
                    epfix->tv_fmt > TV_FMT_S_VIDEO) {
                        printk("e1356fb: invalid specified TV output format\n");
                        goto ret_enxio;
                }
                btmp = epfix->disp_type == DISP_TYPE_PAL ? 0x01 : 0x00;
                btmp |= (epfix->tv_fmt == TV_FMT_S_VIDEO ? 0x02 : 0x00);
                btmp |= ((epfix->tv_filt & TV_FILT_LUM) ? 0x10 : 0x00);
                btmp |= ((epfix->tv_filt & TV_FILT_CHROM) ? 0x20 : 0x00);
                writeb(btmp, &reg->crttv_cfg->tv_output_ctrl);
                break;
        }

        memset(&var, 0, sizeof(var));
        /*
         * If mode_option wasn't given at boot, assume all the boot
         * option timing parameters were specified individually, in
         * which case we convert par_to_var instead of calling
         * fb_find_mode.
         */
        if (epfix->mode_option) {
                struct fb_videomode* modedb, *dm;
                int dbsize = e1356fb_get_mode(&fb_info, 640, 480, &modedb, &dm);

                // first try the generic modedb
                if (!fb_find_mode(&var, &fb_info.fb_info, epfix->mode_option,
                                  NULL, 0, NULL, boot_par.bpp)) {
                        printk("e1356fb: mode %s failed, trying e1356 modedb\n",
                               epfix->mode_option);
                        // didn't work in generic modedb, try ours
                        if (!fb_find_mode(&var, &fb_info.fb_info,
                                          epfix->mode_option,
                                          modedb, dbsize, dm, boot_par.bpp)) {
                                printk("e1356fb: mode %s failed e1356 modedb too, sorry\n",
                                       epfix->mode_option);
                                
                                goto ret_enxio;
                        }
                }

                var.xres_virtual = boot_par.width_virt ?
                        boot_par.width_virt : boot_par.width;
                var.yres_virtual = boot_par.height_virt ?
                        boot_par.height_virt : boot_par.height;
        } else {
                if (e1356fb_par_to_var(&var, &fb_info.default_par, &fb_info)) {
                        printk("e1356fb: boot option mode failed\n");
                        goto ret_enxio;
                }
        }
    
        if (boot_fix.noaccel)
                var.accel_flags &= ~FB_ACCELF_TEXT;
        else
                var.accel_flags |= FB_ACCELF_TEXT;
    
        if (e1356fb_var_to_par(&var, &fb_info.default_par, &fb_info)) {
                /*
                 * Can't use the mode from the mode db or the default
                 * mode or the boot options - give up
                 */
                printk("e1356fb: mode failed var_to_par\n");
                goto ret_enxio;
        }
    
        fb_info.disp.screen_base    = fb_info.membase_virt;
        fb_info.disp.var            = var; // struct copy
    
        // here's where the screen is actually initialized and enabled
        if (e1356fb_set_var(&var, -1, &fb_info.fb_info)) {
                printk("e1356fb: can't set video mode\n");
                goto ret_enxio;
        }
    
        writeb(0, &reg->pwr_save->cfg);     // disable power-save mode
        writeb(0, &reg->misc->cpu2mem_watchdog); // disable watchdog timer

#ifdef E1356FB_VERBOSE_DEBUG
        dump_fb(fb_info.membase_virt + 0x100000, 512);
#endif

        if (register_framebuffer(&fb_info.fb_info) < 0) {
                writeb(0, &reg->misc->disp_mode); 
                printk("e1356fb: can't register framebuffer\n");
                goto ret_enxio;
        }
    
        printk("fb%d: %s frame buffer device\n", 
               GET_FB_IDX(fb_info.fb_info.node),
               fb_info.fb_info.modename);
    
    
        return 0;

 ret_enxio:
        free_pages((unsigned long)fb_info.putcs_buffer, 0);
 unmap_ret_enxio:
        iounmap(fb_info.regbase_virt);
        iounmap(fb_info.membase_virt);
        return -ENXIO;
}

/**
 *      e1356fb_exit - Driver cleanup
 *
 *      Releases all resources allocated during the
 *      course of the driver's lifetime.
 *
 *      FIXME - do results of fb_alloc_cmap need disposal?
 */
static void __exit
e1356fb_exit (void)
{
        unregister_framebuffer(&fb_info.fb_info);
        del_timer_sync(&fb_info.cursor.timer);

#ifdef CONFIG_MTRR
        if (!fb_info.fix.nomtrr) {
                mtrr_del(fb_info.mtrr_idx, fb_info.fix.membase_phys,
                         fb_info.fb_size);
                printk("fb: MTRR's  turned off\n");
        }
#endif

        free_pages((unsigned long)fb_info.putcs_buffer, 0);
        iounmap(fb_info.regbase_virt);
        iounmap(fb_info.membase_virt);
}

MODULE_AUTHOR("Steve Longerbeam <stevel@mvista.com>");
MODULE_DESCRIPTION("SED1356 framebuffer device driver");

#ifdef MODULE
module_init(e1356fb_init);
#endif
module_exit(e1356fb_exit);


void
e1356fb_setup(char *options, int *ints)
{
        char* this_opt;
    
        memset(&boot_fix, 0, sizeof(struct e1356fb_fix));
        memset(&boot_par, 0, sizeof(struct e1356fb_par));
        boot_fix.system = -1;
    
        if (!options || !*options)
                return;
    
        for(this_opt=strtok(options, ","); this_opt;
            this_opt=strtok(NULL, ",")) {
                if (!strncmp(this_opt, "noaccel", 7)) {
                        boot_fix.noaccel = 1;
                } else if (!strncmp(this_opt, "nopan", 5)) {
                        boot_fix.nopan = 1;
                } else if (!strncmp(this_opt, "nohwcursor", 10)) {
                        boot_fix.nohwcursor = 1;
                } else if (!strncmp(this_opt, "mmunalign:", 10)) {
                        boot_fix.mmunalign = simple_strtoul(this_opt+10,
                                                            NULL, 0);
#ifdef CONFIG_MTRR
                } else if (!strncmp(this_opt, "nomtrr", 6)) {
                        boot_fix.nomtrr = 1;
#endif
                } else if (!strncmp(this_opt, "font:", 5)) {
                        strncpy(boot_fix.fontname, this_opt+5,
                                sizeof(boot_fix.fontname)-1);
                } else if (!strncmp(this_opt, "regbase:", 8)) {
                        boot_fix.regbase_phys = simple_strtoul(this_opt+8,
                                                               NULL, 0);
                } else if (!strncmp(this_opt, "membase:", 8)) {
                        boot_fix.membase_phys = simple_strtoul(this_opt+8,
                                                               NULL, 0);
                } else if (!strncmp(this_opt, "memsp:", 6)) {
                        boot_fix.mem_speed = simple_strtoul(this_opt+6,
                                                            NULL, 0);
                } else if (!strncmp(this_opt, "memtyp:", 7)) {
                        boot_fix.mem_type = simple_strtoul(this_opt+7,
                                                           NULL, 0);
                } else if (!strncmp(this_opt, "memref:", 7)) {
                        boot_fix.mem_refresh = simple_strtoul(this_opt+7,
                                                              NULL, 0);
                } else if (!strncmp(this_opt, "memsmr:", 7)) {
                        boot_fix.mem_smr = simple_strtoul(this_opt+7, NULL, 0);
                } else if (!strncmp(this_opt, "busclk:", 7)) {
                        boot_fix.busclk = simple_strtoul(this_opt+7, NULL, 0);
                } else if (!strncmp(this_opt, "clki:", 5)) {
                        boot_fix.clki = simple_strtoul(this_opt+5, NULL, 0);
                } else if (!strncmp(this_opt, "clki2:", 6)) {
                        boot_fix.clki2 = simple_strtoul(this_opt+6, NULL, 0);
                } else if (!strncmp(this_opt, "display:", 8)) {
                        if (!strncmp(this_opt+8, "lcd", 3))
                                boot_fix.disp_type = DISP_TYPE_LCD;
                        else if (!strncmp(this_opt+8, "tft", 3))
                                boot_fix.disp_type = DISP_TYPE_TFT;
                        else if (!strncmp(this_opt+8, "crt", 3))
                                boot_fix.disp_type = DISP_TYPE_CRT;
                        else if (!strncmp(this_opt+8, "pal", 3))
                                boot_fix.disp_type = DISP_TYPE_PAL;
                        else if (!strncmp(this_opt+8, "ntsc", 4))
                                boot_fix.disp_type = DISP_TYPE_NTSC;
                } else if (!strncmp(this_opt, "width:", 6)) {
                        boot_par.width = simple_strtoul(this_opt+6, NULL, 0);
                } else if (!strncmp(this_opt, "height:", 7)) {
                        boot_par.height = simple_strtoul(this_opt+7, NULL, 0);
                } else if (!strncmp(this_opt, "bpp:", 4)) {
                        boot_par.bpp = simple_strtoul(this_opt+4, NULL, 0);
                        boot_par.cmap_len = (boot_par.bpp == 8) ? 256 : 16;
                } else if (!strncmp(this_opt, "elpanel:", 8)) {
                        boot_fix.panel_el = simple_strtoul(this_opt+8,
                                                           NULL, 0);
                } else if (!strncmp(this_opt, "pdataw:", 7)) {
                        boot_fix.panel_width = simple_strtoul(this_opt+7,
                                                              NULL, 0);
                } else if (!strncmp(this_opt, "hndp:", 5)) {
                        boot_par.horiz_ndp = simple_strtoul(this_opt+5,
                                                            NULL, 0);
                } else if (!strncmp(this_opt, "vndp:", 5)) {
                        boot_par.vert_ndp = simple_strtoul(this_opt+5,
                                                           NULL, 0);
                } else if (!strncmp(this_opt, "hspol:", 6)) {
                        boot_par.hsync_pol = simple_strtoul(this_opt+6,
                                                            NULL, 0);
                } else if (!strncmp(this_opt, "vspol:", 6)) {
                        boot_par.vsync_pol = simple_strtoul(this_opt+6,
                                                            NULL, 0);
                } else if (!strncmp(this_opt, "hsstart:", 8)) {
                        boot_par.hsync_start = simple_strtoul(this_opt+8,
                                                              NULL, 0);
                } else if (!strncmp(this_opt, "hswidth:", 8)) {
                        boot_par.hsync_width = simple_strtoul(this_opt+8,
                                                              NULL, 0);
                } else if (!strncmp(this_opt, "vsstart:", 8)) {
                        boot_par.vsync_start = simple_strtoul(this_opt+8,
                                                              NULL, 0);
                } else if (!strncmp(this_opt, "vswidth:", 8)) {
                        boot_par.vsync_width = simple_strtoul(this_opt+8,
                                                              NULL, 0);
                } else if (!strncmp(this_opt, "tvfilt:", 7)) {
                        boot_fix.tv_filt = simple_strtoul(this_opt+7, NULL, 0);
                } else if (!strncmp(this_opt, "tvfmt:", 6)) {
                        boot_fix.tv_fmt = simple_strtoul(this_opt+6, NULL, 0);
                } else if (!strncmp(this_opt, "system:", 7)) {
                        if (!strncmp(this_opt+7, "pb1000", 10)) {
                                boot_fix = systems[SYS_PB1000].fix;
                                boot_par = systems[SYS_PB1000].par;
                        } else if (!strncmp(this_opt+7, "pb1500", 7)) {
                                boot_fix = systems[SYS_PB1500].fix;
                                boot_par = systems[SYS_PB1500].par;
                        } else if (!strncmp(this_opt+7, "sdu1356", 7)) {
                                boot_fix = systems[SYS_SDU1356].fix;
                                boot_par = systems[SYS_SDU1356].par;
                        } else if (!strncmp(this_opt+7, "clio1050", 7)) {
                                boot_fix = systems[SYS_CLIO1050].fix;
                                boot_par = systems[SYS_CLIO1050].par;
                        }
                } else {
                        boot_fix.mode_option = this_opt;
                }
        } 
}


/*
 * FIXME: switching consoles could be dangerous. What if switching
 * from a panel to a CRT/TV, or vice versa? More needs to be
 * done here.
 */
static int
e1356fb_switch_con(int con, struct fb_info *fb)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        struct e1356fb_par par;
        int old_con = currcon;
        int set_par = 1;

        //DPRINTK("\n");

        /* Do we have to save the colormap? */
        if (currcon>=0)
                if (fb_display[currcon].cmap.len)
                        fb_get_cmap(&fb_display[currcon].cmap, 1,
                                    e1356fb_getcolreg, fb);
   
        currcon = con;
        fb_display[currcon].var.activate = FB_ACTIVATE_NOW; 
        e1356fb_var_to_par(&fb_display[con].var, &par, info);
        if (old_con>=0 && vt_cons[old_con]->vc_mode!=KD_GRAPHICS) {
                /* check if we have to change video registers */
                struct e1356fb_par old_par;
                e1356fb_var_to_par(&fb_display[old_con].var, &old_par, info);
                if (!memcmp(&par,&old_par,sizeof(par)))
                        set_par = 0;    /* avoid flicker */
        }
        if (set_par)
                e1356fb_set_par(&par, info);
    
        if (fb_display[con].dispsw && fb_display[con].conp)
                fb_con.con_cursor(fb_display[con].conp, CM_ERASE);
   
        del_timer(&(info->cursor.timer));
        fb_info.cursor.state=CM_ERASE; 
   
        if (!info->fix.nohwcursor) 
                if (fb_display[con].conp)
                        e1356fb_createcursor( &fb_display[con] );
   
        info->cursor.redraw=1;
   
        e1356fb_set_dispsw(&fb_display[con], 
                           info, 
                           par.bpp,
                           fb_display[con].var.accel_flags & FB_ACCELF_TEXT);
   
        e1356fb_install_cmap(&fb_display[con], fb);
        e1356fb_updatevar(con, fb);
   
        return 1;
}

/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
static void
e1356fb_blank(int blank, struct fb_info *fb)
{
        struct fb_info_e1356 *info = (struct fb_info_e1356*)fb;
        reg_dispmode_t* dispmode = (IS_PANEL(info->fix.disp_type)) ?
                info->reg.lcd_mode : info->reg.crttv_mode;
        reg_pwrsave_t* pwrsave = info->reg.pwr_save;

        //DPRINTK("\n");

        switch (blank) {
        case 0:
                // Get out of power save mode
                writeb(0x00, &pwrsave->cfg);
                writeb(readb(&dispmode->disp_mode) & ~0x80,
                       &dispmode->disp_mode);
                break;
        case 1:
                // Get out of power save mode
                writeb(0x00, &pwrsave->cfg);
                writeb(readb(&dispmode->disp_mode) | 0x80,
                       &dispmode->disp_mode);
                break;
                // No support for turning off horiz or vert sync, so just treat
                // it as a power off.
        case 2:
        case 3:
        case 4:
                writeb(0x01, &pwrsave->cfg);
                break;
        }
}


static int
e1356fb_updatevar(int con, struct fb_info* fb)
{
        struct fb_info_e1356* i = (struct fb_info_e1356*)fb;

        //DPRINTK("\n");

        if ((con==currcon) && (!i->fix.nopan)) 
                do_pan_var(&fb_display[con].var,i);
        return 0;
}

static int
e1356fb_getcolreg(unsigned        regno, 
                  unsigned*       red, 
                  unsigned*       green,
                  unsigned*       blue, 
                  unsigned*       transp,
                  struct fb_info* fb)
{
        struct fb_info_e1356* i = (struct fb_info_e1356*)fb;

        if (regno > i->current_par.cmap_len)
                return 1;
   
        *red    = i->palette[regno].red; 
        *green  = i->palette[regno].green; 
        *blue   = i->palette[regno].blue; 
        *transp = 0;
   
        return 0;
}

static int
e1356fb_setcolreg(unsigned        regno, 
                  unsigned        red, 
                  unsigned        green,
                  unsigned        blue, 
                  unsigned        transp,
                  struct fb_info* info)
{
        struct fb_info_e1356* i = (struct fb_info_e1356*)info;

        if (regno > 255)
                return 1;

        i->palette[regno].red    = red;
        i->palette[regno].green  = green;
        i->palette[regno].blue   = blue;
   
        switch(i->current_par.bpp) {
#ifdef FBCON_HAS_CFB8
        case 8:
                do_setpalentry(i->reg.lut, regno,
                               (u8)(red>>8), (u8)(green>>8), (u8)(blue>>8));
                break;
#endif
#ifdef FBCON_HAS_CFB16
        case 16:
                i->fbcon_cmap16[regno] = (regno << 10) | (regno << 5) | regno;
                break;
#endif
        default:
                DPRINTK("bad depth %u\n", i->current_par.bpp);
                break;
        }
        return 0;
}

static void
e1356fb_install_cmap(struct display *d, struct fb_info *info) 
{
        struct fb_info_e1356* i = (struct fb_info_e1356*)info;

        //DPRINTK("\n");

        if (d->cmap.len) {
                fb_set_cmap(&(d->cmap), 1, e1356fb_setcolreg, info);
        } else {
                fb_set_cmap(fb_default_cmap(i->current_par.cmap_len), 1,
                            e1356fb_setcolreg, info);
        }
}

static void
e1356fb_createcursorshape(struct display* p) 
{
        int h,u;
   
        h = fontheight(p);

        fb_info.cursor.type = p->conp->vc_cursor_type & CUR_HWMASK;

        switch (fb_info.cursor.type) {
        case CUR_NONE: 
                u = h; 
                break;
        case CUR_UNDERLINE: 
                u = h - 2; 
                break;
        case CUR_LOWER_THIRD: 
                u = (h * 2) / 3; 
                break;
        case CUR_LOWER_HALF: 
                u = h / 2; 
                break;
        case CUR_TWO_THIRDS: 
                u = h / 3; 
                break;