Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 789 insertions, 0 deletions

diff --git a/drivers/video/S3triofb.c b/drivers/video/S3triofb.c
new file mode 100644
index 000000000000..455fda990ff7
--- /dev/null
+++ b/drivers/video/S3triofb.c
@@ -0,0 +1,789 @@
+/*
+ *  linux/drivers/video/S3Triofb.c -- Open Firmware based frame buffer device
+ *
+ *	Copyright (C) 1997 Peter De Schrijver
+ *
+ *  This driver is partly based on the PowerMac console driver:
+ *
+ *	Copyright (C) 1996 Paul Mackerras
+ *
+ *  and on the Open Firmware based frame buffer device:
+ *
+ *	Copyright (C) 1997 Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License. See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+/*
+	Bugs : + OF dependencies should be removed.
+               + This driver should be merged with the CyberVision driver. The
+                 CyberVision is a Zorro III implementation of the S3Trio64 chip.
+
+*/
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.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/init.h>
+#include <linux/selection.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <linux/pci.h>
+
+#include <video/fbcon.h>
+#include <video/fbcon-cfb8.h>
+#include <video/s3blit.h>
+
+
+#define mem_in8(addr)           in_8((void *)(addr))
+#define mem_in16(addr)          in_le16((void *)(addr))
+#define mem_in32(addr)          in_le32((void *)(addr))
+
+#define mem_out8(val, addr)     out_8((void *)(addr), val)
+#define mem_out16(val, addr)    out_le16((void *)(addr), val)
+#define mem_out32(val, addr)    out_le32((void *)(addr), val)
+
+#define IO_OUT16VAL(v, r)       (((v) << 8) | (r))
+
+static struct display disp;
+static struct fb_info fb_info;
+static struct { u_char red, green, blue, pad; } palette[256];
+static char s3trio_name[16] = "S3Trio ";
+static char *s3trio_base;
+
+static struct fb_fix_screeninfo fb_fix;
+static struct fb_var_screeninfo fb_var = { 0, };
+
+
+    /*
+     *  Interface used by the world
+     */
+
+static void __init s3triofb_of_init(struct device_node *dp);
+static int s3trio_get_fix(struct fb_fix_screeninfo *fix, int con,
+			  struct fb_info *info);
+static int s3trio_get_var(struct fb_var_screeninfo *var, int con,
+			  struct fb_info *info);
+static int s3trio_set_var(struct fb_var_screeninfo *var, int con,
+			  struct fb_info *info);
+static int s3trio_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			   struct fb_info *info);
+static int s3trio_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+                         u_int transp, struct fb_info *info);
+static int s3trio_pan_display(struct fb_var_screeninfo *var, int con,
+			      struct fb_info *info);
+static void s3triofb_blank(int blank, struct fb_info *info);
+
+    /*
+     *  Interface to the low level console driver
+     */
+
+int s3triofb_init(void);
+static int s3triofbcon_switch(int con, struct fb_info *info);
+static int s3triofbcon_updatevar(int con, struct fb_info *info);
+
+    /*
+     *  Text console acceleration
+     */
+
+#ifdef FBCON_HAS_CFB8
+static struct display_switch fbcon_trio8;
+#endif
+
+    /*
+     *    Accelerated Functions used by the low level console driver
+     */
+
+static void Trio_WaitQueue(u_short fifo);
+static void Trio_WaitBlit(void);
+static void Trio_BitBLT(u_short curx, u_short cury, u_short destx,
+			u_short desty, u_short width, u_short height,
+			u_short mode);
+static void Trio_RectFill(u_short x, u_short y, u_short width, u_short height,
+			  u_short mode, u_short color);
+static void Trio_MoveCursor(u_short x, u_short y);
+
+
+    /*
+     *  Internal routines
+     */
+
+static int s3trio_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
+                         u_int *transp, struct fb_info *info);
+
+static struct fb_ops s3trio_ops = {
+	.owner =	THIS_MODULE,
+	.fb_get_fix =	s3trio_get_fix,
+	.fb_get_var =	s3trio_get_var,
+	.fb_set_var =	s3trio_set_var,
+	.fb_get_cmap =	s3trio_get_cmap,
+	.fb_set_cmap =	gen_set_cmap,
+	.fb_setcolreg =	s3trio_setcolreg,
+	.fb_pan_display =s3trio_pan_display,
+	.fb_blank =	s3triofb_blank,
+};
+
+    /*
+     *  Get the Fixed Part of the Display
+     */
+
+static int s3trio_get_fix(struct fb_fix_screeninfo *fix, int con,
+			  struct fb_info *info)
+{
+    memcpy(fix, &fb_fix, sizeof(fb_fix));
+    return 0;
+}
+
+
+    /*
+     *  Get the User Defined Part of the Display
+     */
+
+static int s3trio_get_var(struct fb_var_screeninfo *var, int con,
+			  struct fb_info *info)
+{
+    memcpy(var, &fb_var, sizeof(fb_var));
+    return 0;
+}
+
+
+    /*
+     *  Set the User Defined Part of the Display
+     */
+
+static int s3trio_set_var(struct fb_var_screeninfo *var, int con,
+			  struct fb_info *info)
+{
+    if (var->xres > fb_var.xres || var->yres > fb_var.yres ||
+	var->bits_per_pixel > fb_var.bits_per_pixel )
+	/* || var->nonstd || var->vmode != FB_VMODE_NONINTERLACED) */
+	return -EINVAL;
+    if (var->xres_virtual > fb_var.xres_virtual) {
+	outw(IO_OUT16VAL((var->xres_virtual /8) & 0xff, 0x13), 0x3d4);
+	outw(IO_OUT16VAL(((var->xres_virtual /8 ) & 0x300) >> 3, 0x51), 0x3d4);
+	fb_var.xres_virtual = var->xres_virtual;
+	fb_fix.line_length = var->xres_virtual;
+    }
+    fb_var.yres_virtual = var->yres_virtual;
+    memcpy(var, &fb_var, sizeof(fb_var));
+    return 0;
+}
+
+
+    /*
+     *  Pan or Wrap the Display
+     *
+     *  This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
+     */
+
+static int s3trio_pan_display(struct fb_var_screeninfo *var, int con,
+			      struct fb_info *info)
+{
+    unsigned int base;
+
+    if (var->xoffset > (var->xres_virtual - var->xres))
+	return -EINVAL;
+    if (var->yoffset > (var->yres_virtual - var->yres))
+	return -EINVAL;
+
+    fb_var.xoffset = var->xoffset;
+    fb_var.yoffset = var->yoffset;
+
+    base = var->yoffset * fb_fix.line_length + var->xoffset;
+
+    outw(IO_OUT16VAL((base >> 8) & 0xff, 0x0c),0x03D4);
+    outw(IO_OUT16VAL(base  & 0xff, 0x0d),0x03D4);
+    outw(IO_OUT16VAL((base >> 16) & 0xf, 0x69),0x03D4);
+    return 0;
+}
+
+
+    /*
+     *  Get the Colormap
+     */
+
+static int s3trio_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			   struct fb_info *info)
+{
+    if (con == info->currcon) /* current console? */
+	return fb_get_cmap(cmap, kspc, s3trio_getcolreg, info);
+    else if (fb_display[con].cmap.len) /* non default colormap? */
+	fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
+    else
+	fb_copy_cmap(fb_default_cmap(1 << fb_display[con].var.bits_per_pixel),
+		     cmap, kspc ? 0 : 2);
+    return 0;
+}
+
+int __init s3triofb_init(void)
+{
+	struct device_node *dp;
+
+	dp = find_devices("S3Trio");
+	if (dp != 0)
+	    s3triofb_of_init(dp);
+	return 0;
+}
+
+void __init s3trio_resetaccel(void){
+
+
+#define EC01_ENH_ENB    0x0005
+#define EC01_LAW_ENB    0x0010
+#define EC01_MMIO_ENB   0x0020
+
+#define EC00_RESET      0x8000
+#define EC00_ENABLE     0x4000
+#define MF_MULT_MISC    0xE000
+#define SRC_FOREGROUND  0x0020
+#define SRC_BACKGROUND  0x0000
+#define MIX_SRC                 0x0007
+#define MF_T_CLIP       0x1000
+#define MF_L_CLIP       0x2000
+#define MF_B_CLIP       0x3000
+#define MF_R_CLIP       0x4000
+#define MF_PIX_CONTROL  0xA000
+#define MFA_SRC_FOREGR_MIX      0x0000
+#define MF_PIX_CONTROL  0xA000
+
+	outw(EC00_RESET,  0x42e8);
+	inw(  0x42e8);
+	outw(EC00_ENABLE,  0x42e8);
+	inw(  0x42e8);
+	outw(EC01_ENH_ENB | EC01_LAW_ENB,
+		   0x4ae8);
+	outw(MF_MULT_MISC,  0xbee8); /* 16 bit I/O registers */
+
+	/* Now set some basic accelerator registers */
+	Trio_WaitQueue(0x0400);
+	outw(SRC_FOREGROUND | MIX_SRC, 0xbae8);
+	outw(SRC_BACKGROUND | MIX_SRC,  0xb6e8);/* direct color*/
+	outw(MF_T_CLIP | 0, 0xbee8 );     /* clip virtual area  */
+	outw(MF_L_CLIP | 0, 0xbee8 );
+	outw(MF_R_CLIP | (640 - 1), 0xbee8);
+	outw(MF_B_CLIP | (480 - 1),  0xbee8);
+	Trio_WaitQueue(0x0400);
+	outw(0xffff,  0xaae8);       /* Enable all planes */
+	outw(0xffff, 0xaae8);       /* Enable all planes */
+	outw( MF_PIX_CONTROL | MFA_SRC_FOREGR_MIX,  0xbee8);
+}
+
+int __init s3trio_init(struct device_node *dp){
+
+    u_char bus, dev;
+    unsigned int t32;
+    unsigned short cmd;
+
+	pci_device_loc(dp,&bus,&dev);
+                pcibios_read_config_dword(bus, dev, PCI_VENDOR_ID, &t32);
+                if(t32 == (PCI_DEVICE_ID_S3_TRIO << 16) + PCI_VENDOR_ID_S3) {
+                        pcibios_read_config_dword(bus, dev, PCI_BASE_ADDRESS_0, &t32);
+                        pcibios_read_config_dword(bus, dev, PCI_BASE_ADDRESS_1, &t32);
+			pcibios_read_config_word(bus, dev, PCI_COMMAND,&cmd);
+
+			pcibios_write_config_word(bus, dev, PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
+
+			pcibios_write_config_dword(bus, dev, PCI_BASE_ADDRESS_0,0xffffffff);
+                        pcibios_read_config_dword(bus, dev, PCI_BASE_ADDRESS_0, &t32);
+
+/* This is a gross hack as OF only maps enough memory for the framebuffer and
+   we want to use MMIO too. We should find out which chunk of address space
+   we can use here */
+			pcibios_write_config_dword(bus,dev,PCI_BASE_ADDRESS_0,0xc6000000);
+
+			/* unlock s3 */
+
+			outb(0x01, 0x3C3);
+
+			outb(inb(0x03CC) | 1, 0x3c2);
+
+			outw(IO_OUT16VAL(0x48, 0x38),0x03D4);
+			outw(IO_OUT16VAL(0xA0, 0x39),0x03D4);
+			outb(0x33,0x3d4);
+			outw(IO_OUT16VAL((inb(0x3d5) & ~(0x2 | 0x10 |  0x40)) |
+					  0x20, 0x33), 0x3d4);
+
+			outw(IO_OUT16VAL(0x6, 0x8), 0x3c4);
+
+			/* switch to MMIO only mode */
+
+			outb(0x58, 0x3d4);
+			outw(IO_OUT16VAL(inb(0x3d5) | 3 | 0x10, 0x58), 0x3d4);
+			outw(IO_OUT16VAL(8, 0x53), 0x3d4);
+
+			/* switch off I/O accesses */
+
+#if 0
+			pcibios_write_config_word(bus, dev, PCI_COMMAND,
+				        PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
+#endif
+			return 1;
+                }
+
+	return 0;
+}
+
+
+    /*
+     *  Initialisation
+     *  We heavily rely on OF for the moment. This needs fixing.
+     */
+
+static void __init s3triofb_of_init(struct device_node *dp)
+{
+    int i, *pp, len;
+    unsigned long address, size;
+    u_long *CursorBase;
+
+    strncat(s3trio_name, dp->name, sizeof(s3trio_name));
+    s3trio_name[sizeof(s3trio_name)-1] = '\0';
+    strcpy(fb_fix.id, s3trio_name);
+
+    if((pp = (int *)get_property(dp, "vendor-id", &len)) != NULL
+	&& *pp!=PCI_VENDOR_ID_S3) {
+	printk("%s: can't find S3 Trio board\n", dp->full_name);
+	return;
+    }
+
+    if((pp = (int *)get_property(dp, "device-id", &len)) != NULL
+	&& *pp!=PCI_DEVICE_ID_S3_TRIO) {
+	printk("%s: can't find S3 Trio board\n", dp->full_name);
+	return;
+    }
+
+    if ((pp = (int *)get_property(dp, "depth", &len)) != NULL
+	&& len == sizeof(int) && *pp != 8) {
+	printk("%s: can't use depth = %d\n", dp->full_name, *pp);
+	return;
+    }
+    if ((pp = (int *)get_property(dp, "width", &len)) != NULL
+	&& len == sizeof(int))
+	fb_var.xres = fb_var.xres_virtual = *pp;
+    if ((pp = (int *)get_property(dp, "height", &len)) != NULL
+	&& len == sizeof(int))
+	fb_var.yres = fb_var.yres_virtual = *pp;
+    if ((pp = (int *)get_property(dp, "linebytes", &len)) != NULL
+	&& len == sizeof(int))
+	fb_fix.line_length = *pp;
+    else
+	fb_fix.line_length = fb_var.xres_virtual;
+    fb_fix.smem_len = fb_fix.line_length*fb_var.yres;
+
+    address = 0xc6000000;
+    size = 64*1024*1024;
+    if (!request_mem_region(address, size, "S3triofb"))
+	return;
+
+    s3trio_init(dp);
+    s3trio_base = ioremap(address, size);
+    fb_fix.smem_start = address;
+    fb_fix.type = FB_TYPE_PACKED_PIXELS;
+    fb_fix.type_aux = 0;
+    fb_fix.accel = FB_ACCEL_S3_TRIO64;
+    fb_fix.mmio_start = address+0x1000000;
+    fb_fix.mmio_len = 0x1000000;
+
+    fb_fix.xpanstep = 1;
+    fb_fix.ypanstep = 1;
+
+    s3trio_resetaccel();
+
+    mem_out8(0x30, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0x2d, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0x2e, s3trio_base+0x1008000 + 0x03D4);
+
+    mem_out8(0x50, s3trio_base+0x1008000 + 0x03D4);
+
+    /* disable HW cursor */
+
+    mem_out8(0x39, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0xa0, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x45, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x4e, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x4f, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0, s3trio_base+0x1008000 + 0x03D5);
+
+    /* init HW cursor */
+
+    CursorBase = (u_long *)(s3trio_base + 2*1024*1024 - 0x400);
+	for (i = 0; i < 8; i++) {
+		*(CursorBase  +(i*4)) = 0xffffff00;
+		*(CursorBase+1+(i*4)) = 0xffff0000;
+		*(CursorBase+2+(i*4)) = 0xffff0000;
+		*(CursorBase+3+(i*4)) = 0xffff0000;
+	}
+	for (i = 8; i < 64; i++) {
+		*(CursorBase  +(i*4)) = 0xffff0000;
+		*(CursorBase+1+(i*4)) = 0xffff0000;
+		*(CursorBase+2+(i*4)) = 0xffff0000;
+		*(CursorBase+3+(i*4)) = 0xffff0000;
+	}
+
+
+    mem_out8(0x4c, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(((2*1024 - 1)&0xf00)>>8, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x4d, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8((2*1024 - 1) & 0xff, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x45, s3trio_base+0x1008000 + 0x03D4);
+    mem_in8(s3trio_base+0x1008000 + 0x03D4);
+
+    mem_out8(0x4a, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0x80, s3trio_base+0x1008000 + 0x03D5);
+    mem_out8(0x80, s3trio_base+0x1008000 + 0x03D5);
+    mem_out8(0x80, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x4b, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0x00, s3trio_base+0x1008000 + 0x03D5);
+    mem_out8(0x00, s3trio_base+0x1008000 + 0x03D5);
+    mem_out8(0x00, s3trio_base+0x1008000 + 0x03D5);
+
+    mem_out8(0x45, s3trio_base+0x1008000 + 0x03D4);
+    mem_out8(0, s3trio_base+0x1008000 + 0x03D5);
+
+    /* setup default color table */
+
+	for(i = 0; i < 16; i++) {
+		int j = color_table[i];
+		palette[i].red=default_red[j];
+		palette[i].green=default_grn[j];
+		palette[i].blue=default_blu[j];
+	}
+
+    s3trio_setcolreg(255, 56, 100, 160, 0, NULL /* not used */);
+    s3trio_setcolreg(254, 0, 0, 0, 0, NULL /* not used */);
+    memset((char *)s3trio_base, 0, 640*480);
+
+#if 0
+    Trio_RectFill(0, 0, 90, 90, 7, 1);
+#endif
+
+    fb_fix.visual = FB_VISUAL_PSEUDOCOLOR ;
+    fb_var.xoffset = fb_var.yoffset = 0;
+    fb_var.bits_per_pixel = 8;
+    fb_var.grayscale = 0;
+    fb_var.red.offset = fb_var.green.offset = fb_var.blue.offset = 0;
+    fb_var.red.length = fb_var.green.length = fb_var.blue.length = 8;
+    fb_var.red.msb_right = fb_var.green.msb_right = fb_var.blue.msb_right = 0;
+    fb_var.transp.offset = fb_var.transp.length = fb_var.transp.msb_right = 0;
+    fb_var.nonstd = 0;
+    fb_var.activate = 0;
+    fb_var.height = fb_var.width = -1;
+    fb_var.accel_flags = FB_ACCELF_TEXT;
+#warning FIXME: always obey fb_var.accel_flags
+    fb_var.pixclock = 1;
+    fb_var.left_margin = fb_var.right_margin = 0;
+    fb_var.upper_margin = fb_var.lower_margin = 0;
+    fb_var.hsync_len = fb_var.vsync_len = 0;
+    fb_var.sync = 0;
+    fb_var.vmode = FB_VMODE_NONINTERLACED;
+
+    disp.var = fb_var;
+    disp.cmap.start = 0;
+    disp.cmap.len = 0;
+    disp.cmap.red = disp.cmap.green = disp.cmap.blue = disp.cmap.transp = NULL;
+    disp.visual = fb_fix.visual;
+    disp.type = fb_fix.type;
+    disp.type_aux = fb_fix.type_aux;
+    disp.ypanstep = 0;
+    disp.ywrapstep = 0;
+    disp.line_length = fb_fix.line_length;
+    disp.can_soft_blank = 1;
+    disp.inverse = 0;
+#ifdef FBCON_HAS_CFB8
+    if (fb_var.accel_flags & FB_ACCELF_TEXT)
+	disp.dispsw = &fbcon_trio8;
+    else
+	disp.dispsw = &fbcon_cfb8;
+#else
+    disp.dispsw = &fbcon_dummy;
+#endif
+    disp.scrollmode = fb_var.accel_flags & FB_ACCELF_TEXT ? 0 : SCROLL_YREDRAW;
+
+    strcpy(fb_info.modename, "Trio64 ");
+    strncat(fb_info.modename, dp->full_name, sizeof(fb_info.modename));
+    fb_info.currcon = -1;
+    fb_info.fbops = &s3trio_ops;
+    fb_info.screen_base = s3trio_base;	
+#if 0
+    fb_info.fbvar_num = 1;
+    fb_info.fbvar = &fb_var;
+#endif
+    fb_info.disp = &disp;
+    fb_info.fontname[0] = '\0';
+    fb_info.changevar = NULL;
+    fb_info.switch_con = &s3triofbcon_switch;
+    fb_info.updatevar = &s3triofbcon_updatevar;
+#if 0
+    fb_info.setcmap = &s3triofbcon_setcmap;
+#endif
+
+    fb_info.flags = FBINFO_FLAG_DEFAULT;
+    if (register_framebuffer(&fb_info) < 0)
+	return;
+
+    printk("fb%d: S3 Trio frame buffer device on %s\n",
+	   fb_info.node, dp->full_name);
+}
+
+
+static int s3triofbcon_switch(int con, struct fb_info *info)
+{
+    /* Do we have to save the colormap? */
+    if (fb_display[info->currcon].cmap.len)
+	fb_get_cmap(&fb_display[info->currcon].cmap, 1, s3trio_getcolreg, info);
+
+    info->currcon = con;
+    /* Install new colormap */
+    do_install_cmap(con,info);
+    return 0;
+}
+
+    /*
+     *  Update the `var' structure (called by fbcon.c)
+     */
+
+static int s3triofbcon_updatevar(int con, struct fb_info *info)
+{
+    /* Nothing */
+    return 0;
+}
+
+    /*
+     *  Blank the display.
+     */
+
+static int s3triofb_blank(int blank, struct fb_info *info)
+{
+    unsigned char x;
+
+    mem_out8(0x1, s3trio_base+0x1008000 + 0x03c4);
+    x = mem_in8(s3trio_base+0x1008000 + 0x03c5);
+    mem_out8((x & (~0x20)) | (blank << 5), s3trio_base+0x1008000 + 0x03c5);
+    return 0;	
+}
+
+    /*
+     *  Read a single color register and split it into
+     *  colors/transparent. Return != 0 for invalid regno.
+     */
+
+static int s3trio_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
+                         u_int *transp, struct fb_info *info)
+{
+    if (regno > 255)
+	return 1;
+    *red = (palette[regno].red << 8) | palette[regno].red;
+    *green = (palette[regno].green << 8) | palette[regno].green;
+    *blue = (palette[regno].blue << 8) | palette[regno].blue;
+    *transp = 0;
+    return 0;
+}
+
+
+    /*
+     *  Set a single color register. Return != 0 for invalid regno.
+     */
+
+static int s3trio_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+                            u_int transp, struct fb_info *info)
+{
+    if (regno > 255)
+	return 1;
+
+    red >>= 8;
+    green >>= 8;
+    blue >>= 8;
+    palette[regno].red = red;
+    palette[regno].green = green;
+    palette[regno].blue = blue;
+
+    mem_out8(regno,s3trio_base+0x1008000 + 0x3c8);
+    mem_out8((red & 0xff) >> 2,s3trio_base+0x1008000 + 0x3c9);
+    mem_out8((green & 0xff) >> 2,s3trio_base+0x1008000 + 0x3c9);
+    mem_out8((blue & 0xff) >> 2,s3trio_base+0x1008000 + 0x3c9);
+
+    return 0;
+}
+
+static void Trio_WaitQueue(u_short fifo) {
+
+	u_short status;
+
+        do
+        {
+		status = mem_in16(s3trio_base + 0x1000000 + 0x9AE8);
+	}  while (!(status & fifo));
+
+}
+
+static void Trio_WaitBlit(void) {
+
+	u_short status;
+
+        do
+        {
+		status = mem_in16(s3trio_base + 0x1000000 + 0x9AE8);
+	}  while (status & 0x200);
+
+}
+
+static void Trio_BitBLT(u_short curx, u_short cury, u_short destx,
+			u_short desty, u_short width, u_short height,
+			u_short mode) {
+
+	u_short blitcmd = 0xc011;
+
+	/* Set drawing direction */
+        /* -Y, X maj, -X (default) */
+
+	if (curx > destx)
+		blitcmd |= 0x0020;  /* Drawing direction +X */
+	else {
+		curx  += (width - 1);
+		destx += (width - 1);
+	}
+
+	if (cury > desty)
+		blitcmd |= 0x0080;  /* Drawing direction +Y */
+	else {
+		cury  += (height - 1);
+		desty += (height - 1);
+	}
+
+	Trio_WaitQueue(0x0400);
+
+	outw(0xa000,  0xBEE8);
+	outw(0x60 | mode,  0xBAE8);
+
+	outw(curx,  0x86E8);
+	outw(cury,  0x82E8);
+
+	outw(destx,  0x8EE8);
+	outw(desty,  0x8AE8);
+
+	outw(height - 1,  0xBEE8);
+	outw(width - 1,  0x96E8);
+
+	outw(blitcmd,  0x9AE8);
+
+}
+
+static void Trio_RectFill(u_short x, u_short y, u_short width, u_short height,
+			  u_short mode, u_short color) {
+
+	u_short blitcmd = 0x40b1;
+
+	Trio_WaitQueue(0x0400);
+
+	outw(0xa000,  0xBEE8);
+	outw((0x20 | mode),  0xBAE8);
+	outw(0xe000,  0xBEE8);
+	outw(color,  0xA6E8);
+	outw(x,  0x86E8);
+	outw(y,  0x82E8);
+	outw((height - 1), 0xBEE8);
+	outw((width - 1), 0x96E8);
+	outw(blitcmd,  0x9AE8);
+
+}
+
+
+static void Trio_MoveCursor(u_short x, u_short y) {
+
+	mem_out8(0x39, s3trio_base + 0x1008000 + 0x3d4);
+	mem_out8(0xa0, s3trio_base + 0x1008000 + 0x3d5);
+
+	mem_out8(0x46, s3trio_base + 0x1008000 + 0x3d4);
+	mem_out8((x & 0x0700) >> 8, s3trio_base + 0x1008000 + 0x3d5);
+	mem_out8(0x47, s3trio_base + 0x1008000 + 0x3d4);
+	mem_out8(x & 0x00ff, s3trio_base + 0x1008000 + 0x3d5);
+
+	mem_out8(0x48, s3trio_base + 0x1008000 + 0x3d4);
+	mem_out8((y & 0x0700) >> 8, s3trio_base + 0x1008000 + 0x3d5);
+	mem_out8(0x49, s3trio_base + 0x1008000 + 0x3d4);
+	mem_out8(y & 0x00ff, s3trio_base + 0x1008000 + 0x3d5);
+
+}
+
+
+    /*
+     *  Text console acceleration
+     */
+
+#ifdef FBCON_HAS_CFB8
+static void fbcon_trio8_bmove(struct display *p, int sy, int sx, int dy,
+			      int dx, int height, int width)
+{
+    sx *= 8; dx *= 8; width *= 8;
+    Trio_BitBLT((u_short)sx, (u_short)(sy*fontheight(p)), (u_short)dx,
+		 (u_short)(dy*fontheight(p)), (u_short)width,
+		 (u_short)(height*fontheight(p)), (u_short)S3_NEW);
+}
+
+static void fbcon_trio8_clear(struct vc_data *conp, struct display *p, int sy,
+			      int sx, int height, int width)
+{
+    unsigned char bg;
+
+    sx *= 8; width *= 8;
+    bg = attr_bgcol_ec(p,conp);
+    Trio_RectFill((u_short)sx,
+		   (u_short)(sy*fontheight(p)),
+		   (u_short)width,
+		   (u_short)(height*fontheight(p)),
+		   (u_short)S3_NEW,
+		   (u_short)bg);
+}
+
+static void fbcon_trio8_putc(struct vc_data *conp, struct display *p, int c,
+			     int yy, int xx)
+{
+    Trio_WaitBlit();
+    fbcon_cfb8_putc(conp, p, c, yy, xx);
+}
+
+static void fbcon_trio8_putcs(struct vc_data *conp, struct display *p,
+			      const unsigned short *s, int count, int yy, int xx)
+{
+    Trio_WaitBlit();
+    fbcon_cfb8_putcs(conp, p, s, count, yy, xx);
+}
+
+static void fbcon_trio8_revc(struct display *p, int xx, int yy)
+{
+    Trio_WaitBlit();
+    fbcon_cfb8_revc(p, xx, yy);
+}
+
+static struct display_switch fbcon_trio8 = {
+   .setup =		fbcon_cfb8_setup,
+   .bmove =		fbcon_trio8_bmove,
+   .clear =		fbcon_trio8_clear,
+   .putc =		fbcon_trio8_putc,
+   .putcs =		fbcon_trio8_putcs,
+   .revc =		fbcon_trio8_revc,
+   .clear_margins =	fbcon_cfb8_clear_margins,
+   .fontwidthmask =	FONTWIDTH(8)
+};
+#endif
+
+MODULE_LICENSE("GPL");