177 lines
4.6 KiB
C
177 lines
4.6 KiB
C
/*
|
|
* linux/drivers/video/maxinefb.c
|
|
*
|
|
* DECstation 5000/xx onboard framebuffer support ... derived from:
|
|
* "HP300 Topcat framebuffer support (derived from macfb of all things)
|
|
* Phil Blundell <philb@gnu.org> 1998", the original code can be
|
|
* found in the file hpfb.c in the same directory.
|
|
*
|
|
* DECstation related code Copyright (C) 1999,2000,2001 by
|
|
* Michael Engel <engel@unix-ag.org> and
|
|
* Karsten Merker <merker@linuxtag.org>.
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Changes:
|
|
* 2001/01/27 removed debugging and testing code, fixed fb_ops
|
|
* initialization which had caused a crash before,
|
|
* general cleanup, first official release (KM)
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
#include <linux/fb.h>
|
|
#include <video/maxinefb.h>
|
|
|
|
/* bootinfo.h defines the machine type values, needed when checking */
|
|
/* whether are really running on a maxine, KM */
|
|
#include <asm/bootinfo.h>
|
|
|
|
static struct fb_info fb_info;
|
|
|
|
static struct fb_var_screeninfo maxinefb_defined = {
|
|
.xres = 1024,
|
|
.yres = 768,
|
|
.xres_virtual = 1024,
|
|
.yres_virtual = 768,
|
|
.bits_per_pixel =8,
|
|
.activate = FB_ACTIVATE_NOW,
|
|
.height = -1,
|
|
.width = -1,
|
|
.vmode = FB_VMODE_NONINTERLACED,
|
|
};
|
|
|
|
static struct fb_fix_screeninfo maxinefb_fix = {
|
|
.id = "Maxine",
|
|
.smem_len = (1024*768),
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.visual = FB_VISUAL_PSEUDOCOLOR,
|
|
.line_length = 1024,
|
|
};
|
|
|
|
/* Handle the funny Inmos RamDAC/video controller ... */
|
|
|
|
void maxinefb_ims332_write_register(int regno, register unsigned int val)
|
|
{
|
|
register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
|
|
unsigned char *wptr;
|
|
|
|
wptr = regs + 0xa0000 + (regno << 4);
|
|
*((volatile unsigned int *) (regs)) = (val >> 8) & 0xff00;
|
|
*((volatile unsigned short *) (wptr)) = val;
|
|
}
|
|
|
|
unsigned int maxinefb_ims332_read_register(int regno)
|
|
{
|
|
register unsigned char *regs = (char *) MAXINEFB_IMS332_ADDRESS;
|
|
unsigned char *rptr;
|
|
register unsigned int j, k;
|
|
|
|
rptr = regs + 0x80000 + (regno << 4);
|
|
j = *((volatile unsigned short *) rptr);
|
|
k = *((volatile unsigned short *) regs);
|
|
|
|
return (j & 0xffff) | ((k & 0xff00) << 8);
|
|
}
|
|
|
|
/* Set the palette */
|
|
static int maxinefb_setcolreg(unsigned regno, unsigned red, unsigned green,
|
|
unsigned blue, unsigned transp, struct fb_info *info)
|
|
{
|
|
/* value to be written into the palette reg. */
|
|
unsigned long hw_colorvalue = 0;
|
|
|
|
if (regno > 255)
|
|
return 1;
|
|
|
|
red >>= 8; /* The cmap fields are 16 bits */
|
|
green >>= 8; /* wide, but the harware colormap */
|
|
blue >>= 8; /* registers are only 8 bits wide */
|
|
|
|
hw_colorvalue = (blue << 16) + (green << 8) + (red);
|
|
|
|
maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE + regno,
|
|
hw_colorvalue);
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops maxinefb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_setcolreg = maxinefb_setcolreg,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
};
|
|
|
|
int __init maxinefb_init(void)
|
|
{
|
|
unsigned long fboff;
|
|
unsigned long fb_start;
|
|
int i;
|
|
|
|
if (fb_get_options("maxinefb", NULL))
|
|
return -ENODEV;
|
|
|
|
/* Validate we're on the proper machine type */
|
|
if (mips_machtype != MACH_DS5000_XX) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(KERN_INFO "Maxinefb: Personal DECstation detected\n");
|
|
printk(KERN_INFO "Maxinefb: initializing onboard framebuffer\n");
|
|
|
|
/* Framebuffer display memory base address */
|
|
fb_start = DS5000_xx_ONBOARD_FBMEM_START;
|
|
|
|
/* Clear screen */
|
|
for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++)
|
|
*(volatile unsigned char *)fboff = 0x0;
|
|
|
|
maxinefb_fix.smem_start = fb_start;
|
|
|
|
/* erase hardware cursor */
|
|
for (i = 0; i < 512; i++) {
|
|
maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i,
|
|
0);
|
|
/*
|
|
if (i&0x8 == 0)
|
|
maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f);
|
|
else
|
|
maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0);
|
|
*/
|
|
}
|
|
|
|
fb_info.fbops = &maxinefb_ops;
|
|
fb_info.screen_base = (char *)maxinefb_fix.smem_start;
|
|
fb_info.var = maxinefb_defined;
|
|
fb_info.fix = maxinefb_fix;
|
|
fb_info.flags = FBINFO_DEFAULT;
|
|
|
|
fb_alloc_cmap(&fb_info.cmap, 256, 0);
|
|
|
|
if (register_framebuffer(&fb_info) < 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit maxinefb_exit(void)
|
|
{
|
|
unregister_framebuffer(&fb_info);
|
|
}
|
|
|
|
#ifdef MODULE
|
|
MODULE_LICENSE("GPL");
|
|
#endif
|
|
module_init(maxinefb_init);
|
|
module_exit(maxinefb_exit);
|
|
|