/*
* linux/arch/m68knommu/console/68328fb.c -- Low level implementation of the
* mc68328 LCD frame buffer device
*
* Copyright (C) 1998,1999 Kenneth Albanowski <kjahds@kjahds.com>,
* The Silver Hammer Group, Ltd.
*
*
* This file is based on the Amiga CyberVision frame buffer device (Cyberfb.c):
*
* Copyright (C) 1996 Martin Apel
* Geert Uytterhoeven
*
*
* This file is based on the Amiga frame buffer device (amifb.c):
*
* Copyright (C) 1995 Geert Uytterhoeven
*
*
* History:
* - 17 Feb 98: Original version by Kenneth Albanowski <kjahds@kjahds.com>
*
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/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/delay.h>
#include <linux/config.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <linux/fb.h>
#define arraysize(x) (sizeof(x)/sizeof(*(x)))
static struct fb_info fb_info;
/*
* mc68328vision Graphics Board
*/
#define CYBER8_WIDTH 1152
#define CYBER8_HEIGHT 886
#define CYBER8_PIXCLOCK 12500 /* ++Geert: Just a guess */
#define CYBER16_WIDTH 800
#define CYBER16_HEIGHT 600
#define CYBER16_PIXCLOCK 25000 /* ++Geert: Just a guess */
#define PALM_WIDTH 160
#define PALM_HEIGHT 160
/*static int mc68328Key = 0;
static u_char mc68328_colour_table [256][4];*/
/*
* Predefined Video Mode Names
*/
static char *mc68328_fb_modenames[] = {
/*
* Autodetect (Default) Video Mode
*/
"default",
/*
* Predefined Video Modes
*/
"Palm", /* Palm Pilot devices, 1.0 and higher */
"Palm Grey", /* Palm Pilot devices, 1.0 and higher */
/*
* Dummy Video Modes
*/
"dummy", "dummy", "dummy", "dummy", "dummy", "dummy", "dummy",
"dummy",
"dummy", "dummy", "dummy", "dummy", "dummy", "dummy", "dummy",
"dummy",
"dummy", "dummy", "dummy", "dummy",
/*
* User Defined Video Modes
*
* This doesn't work yet!!
*/
"user0", "user1", "user2", "user3", "user4", "user5", "user6",
"user7"
};
/*
* Predefined Video Mode Definitions
*/
static struct fb_var_screeninfo mc68328_fb_predefined[] = {
/*
* Autodetect (Default) Video Mode
*/
{0,},
/*
* Predefined Video Modes
*/
{
/* Palm */
PALM_WIDTH, PALM_HEIGHT, PALM_WIDTH, PALM_HEIGHT,
0, 0,
1, -1,
{0, 1, 0}, {0, 1, 0}, {0, 1, 0}, {0, 0, 0},
0, 0,
-1, -1, /* phys height, width */
FB_ACCEL_NONE,
0, 0, 0, 0, 0, 0, 0, /* timing */
0, /* sync */
FB_VMODE_NONINTERLACED},
{
/* Palm Grey */
PALM_WIDTH, PALM_HEIGHT, PALM_WIDTH, PALM_HEIGHT,
0, 0,
2, -1,
{0, 2, 0}, {0, 2, 0}, {0, 2, 0}, {0, 0, 0},
0, 0,
-1, -1, /* phys height, width */
FB_ACCEL_NONE,
0, 0, 0, 0, 0, 0, 0, /* timing */
0, /* sync */
FB_VMODE_NONINTERLACED},
/*
* Dummy Video Modes
*/
{0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,},
{0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,},
{0,}, {0,},
/*
* User Defined Video Modes
*/
{0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,}, {0,}
};
static struct fb_fix_screeninfo mc68328_fix __initdata = {
.id = "mc68328";
.smem_len = 160 * 160 /8;
.type = FB_TYPE_PACKED_PIXELS;
.accel = FB_ACCEL_NONE;
};
#define NUM_TOTAL_MODES arraysize(mc68328_fb_predefined)
#define NUM_PREDEF_MODES (3)
static int mc68328fb_inverse = 0;
static int mc68328fb_mode = 0;
static int mc68328fbCursorMode = 0;
/*
* Some default modes
*/
#define PALM_DEFMODE (1)
#define CYBER16_DEFMODE (2)
/*
* Interface used by the world
*/
int mc68328_fb_init(void);
static int mc68328fb_setcolreg(u_int regno, u_int red, u_int green,
u_int blue, u_int transp);
static void mc68328fb_blank(int blank, struct fb_info *info);
/*
* Accelerated Functions used by the low level console driver
*/
void mc68328_WaitQueue(u_short fifo);
void mc68328_WaitBlit(void);
void mc68328_BitBLT(u_short curx, u_short cury, u_short destx,
u_short desty, u_short width, u_short height,
u_short mode);
void mc68328_RectFill(u_short x, u_short y, u_short width, u_short height,
u_short mode, u_short color);
void mc68328_MoveCursor(u_short x, u_short y);
/*
* Internal routines
*/
static int get_video_mode(const char *name);
/*
* Set a single color register. The values supplied are already
* rounded down to the hardware's capabilities (according to the
* entries in the var structure). Return != 0 for invalid regno.
*/
static int mc68328fb_setcolreg(u_int regno, u_int red, u_int green,
u_int blue, u_int transp)
{
return 1;
#if 0
if (regno > 255)
return (1);
*(mc68328Regs + 0x3c8) = (char) regno;
mc68328_colour_table[regno][0] = red & 0xff;
mc68328_colour_table[regno][1] = green & 0xff;
mc68328_colour_table[regno][2] = blue & 0xff;
mc68328_colour_table[regno][3] = transp;
*(mc68328Regs + 0x3c9) = (red & 0xff) >> 2;
*(mc68328Regs + 0x3c9) = (green & 0xff) >> 2;
*(mc68328Regs + 0x3c9) = (blue & 0xff) >> 2;
return (0);
#endif
}
/*
* (Un)Blank the screen
*/
static void mc68328fb_blank(int blank, struct fb_info *info)
{
#if 0
if (blank)
(*(volatile unsigned char *) 0xFFFFFA27) &= ~128;
else
(*(volatile unsigned char *) 0xFFFFFA27) |= 128;
#endif
}
/**************************************************************
* We are waiting for "fifo" FIFO-slots empty
*/
void mc68328_WaitQueue(u_short fifo)
{
}
/**************************************************************
* We are waiting for Hardware (Graphics Engine) not busy
*/
void mc68328_WaitBlit(void)
{
}
/**************************************************************
* BitBLT - Through the Plane
*/
void mc68328_BitBLT(u_short curx, u_short cury, u_short destx,
u_short desty, u_short width, u_short height,
u_short mode)
{
#if 0
u_short blitcmd = S3_BITBLT;
/* 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);
}
mc68328_WaitQueue(0x8000);
*((u_short volatile *) (mc68328Regs + S3_PIXEL_CNTL)) = 0xa000;
*((u_short volatile *) (mc68328Regs + S3_FRGD_MIX)) =
(0x0060 | mode);
*((u_short volatile *) (mc68328Regs + S3_CUR_X)) = curx;
*((u_short volatile *) (mc68328Regs + S3_CUR_Y)) = cury;
*((u_short volatile *) (mc68328Regs + S3_DESTX_DIASTP)) = destx;
*((u_short volatile *) (mc68328Regs + S3_DESTY_AXSTP)) = desty;
*((u_short volatile *) (mc68328Regs + S3_MIN_AXIS_PCNT)) =
height - 1;
*((u_short volatile *) (mc68328Regs + S3_MAJ_AXIS_PCNT)) =
width - 1;
*((u_short volatile *) (mc68328Regs + S3_CMD)) = blitcmd;
#endif
}
/**************************************************************
* Rectangle Fill Solid
*/
void mc68328_RectFill(u_short x, u_short y, u_short width, u_short height,
u_short mode, u_short color)
{
#if 0
u_short blitcmd = S3_FILLEDRECT;
mc68328_WaitQueue(0x8000);
*((u_short volatile *) (mc68328Regs + S3_PIXEL_CNTL)) = 0xa000;
*((u_short volatile *) (mc68328Regs + S3_FRGD_MIX)) =
(0x0020 | mode);
*((u_short volatile *) (mc68328Regs + S3_MULT_MISC)) = 0xe000;
*((u_short volatile *) (mc68328Regs + S3_FRGD_COLOR)) = color;
*((u_short volatile *) (mc68328Regs + S3_CUR_X)) = x;
*((u_short volatile *) (mc68328Regs + S3_CUR_Y)) = y;
*((u_short volatile *) (mc68328Regs + S3_MIN_AXIS_PCNT)) =
height - 1;
*((u_short volatile *) (mc68328Regs + S3_MAJ_AXIS_PCNT)) =
width - 1;
*((u_short volatile *) (mc68328Regs + S3_CMD)) = blitcmd;
#endif
}
/**************************************************************
* Move cursor to x, y
*/
void mc68328_MoveCursor(u_short x, u_short y)
{
(*(volatile unsigned short *) 0xFFFFFA18) =
(mc68328fbCursorMode << 14) | x;
(*(volatile unsigned short *) 0xFFFFFA1A) = y;
#if 0
*(mc68328Regs + S3_CRTC_ADR) = 0x39;
*(mc68328Regs + S3_CRTC_DATA) = 0xa0;
*(mc68328Regs + S3_CRTC_ADR) = S3_HWGC_ORGX_H;
*(mc68328Regs + S3_CRTC_DATA) = (char) ((x & 0x0700) >> 8);
*(mc68328Regs + S3_CRTC_ADR) = S3_HWGC_ORGX_L;
*(mc68328Regs + S3_CRTC_DATA) = (char) (x & 0x00ff);
*(mc68328Regs + S3_CRTC_ADR) = S3_HWGC_ORGY_H;
*(mc68328Regs + S3_CRTC_DATA) = (char) ((y & 0x0700) >> 8);
*(mc68328Regs + S3_CRTC_ADR) = S3_HWGC_ORGY_L;
*(mc68328Regs + S3_CRTC_DATA) = (char) (y & 0x00ff);
#endif
}
/* -------------------- Generic routines ------------------------------------ */
/*
* Default Colormaps
*/
static u_short red16[] =
{ 0xc000, 0x0000, 0x0000, 0x0000, 0xc000, 0xc000, 0xc000, 0x0000,
0x8000, 0x0000, 0x0000, 0x0000, 0xffff, 0xffff, 0xffff, 0xffff
};
static u_short green16[] =
{ 0xc000, 0x0000, 0xc000, 0xc000, 0x0000, 0x0000, 0xc000, 0x0000,
0x8000, 0x0000, 0xffff, 0xffff, 0x0000, 0x0000, 0xffff, 0xffff
};
static u_short blue16[] =
{ 0xc000, 0x0000, 0x0000, 0xc000, 0x0000, 0xc000, 0x0000, 0x0000,
0x8000, 0xffff, 0x0000, 0xffff, 0x0000, 0xffff, 0x0000, 0xffff
};
static struct fb_cmap default_16_colors =
{ 0, 16, red16, green16, blue16, NULL };
static struct fb_cmap *get_default_colormap(int bpp)
{
return (&default_16_colors);
}
#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7fff-(val))>>16)
#define CNVT_FROMHW(val,width) (((width) ? ((((val)<<16)-(val)) / \
((1<<(width))-1)) : 0))
static struct fb_ops mc68328_fb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = mc68328fb_setcolreg,
.fb_fillrect = cfbfillrect,
.fb_copyarea = cfbcopyarea,
.fb_imageblit = cfbimgblt,
.fb_cursor = softcursor,
};
/*
* Initialization
*/
int __init mc68328_fb_init(void)
{
if (mc68328fb_mode == -1)
mc68328fb_mode = PALM_DEFMODE;
mc68328_fix.smem_start = (*(volatile unsigned long *) 0xFFFFFA00);
/*kernel_map (board_addr + 0x01400000, 0x00400000, */
info->var = mc68328_fb_predefined[mc68328fb_mode];
if (info->var.bits_per_pixel == 1)
fix->visual = FB_VISUAL_MONO01;
else
fix->visual = FB_VISUAL_DIRECTCOLOR;
info->screen_base = (u_char *) mc68328_fix.smem_start;
if (register_framebuffer(&fb_info) < 0)
panic("Cannot register frame buffer\n");
return 0;
}
/*
* Get a Video Mode
*/
static int get_video_mode(const char *name)
{
int i;
for (i = 1; i < NUM_PREDEF_MODES; i++)
if (!strcmp(name, mc68328_fb_modenames[i]))
return (i);
return (0);
}
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