/* *      linux/drivers/video/pmag-ba-fb.c * *	PMAG-BA TurboChannel framebuffer card 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. * *	Based on digital document: * 	"PMAG-BA TURBOchannel Color Frame Buffer *	 Functional Specification", Revision 1.2, August 27, 1990 * *      DECstation related code Copyright (C) 1999, 2000, 2001 by *      Michael Engel <engel@unix-ag.org>,  *      Karsten Merker <merker@linuxtag.org> and *	Harald Koerfgen. *      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/sched.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/timer.h>#include <linux/mm.h>#include <linux/tty.h>#include <linux/slab.h>#include <linux/delay.h>#include <linux/init.h>#include <linux/fb.h>#include <asm/bootinfo.h>#include <asm/dec/machtype.h>#include <asm/dec/tc.h>#include <video/pmag-ba-fb.h>struct pmag_ba_ramdac_regs {	unsigned char addr_low;	unsigned char pad0[3];	unsigned char addr_hi;	unsigned char pad1[3];	unsigned char data;	unsigned char pad2[3];	unsigned char cmap;};/* * Max 3 TURBOchannel slots -> max 3 PMAG-BA :) */static struct fb_info pmagba_fb_info[3];static struct fb_var_screeninfo pmagbafb_defined = {	.xres 		= 1024,	.yres		= 864,	.xres_virtual 	= 1024,	.yres_virtual 	= 864,	.bits_per_pixel = 8,	.red.length	= 8,	.green.length	= 8,	.blue.length	= 8,	.activate 	= FB_ACTIVATE_NOW, 	.height 	= 274,		.width 		= 195,	.accel 		= FB_ACCEL_NONE,	.vmode 		= FB_VMODE_NONINTERLACED,};static struct fb_fix_screeninfo pmagbafb_fix = {	.id 		= "PMAG-BA",	.smem_len 	= (1024 * 864),	.type 		= FB_TYPE_PACKED_PIXELS,	.visual 	= FB_VISUAL_PSEUDOCOLOR,	.line_length 	= 1024,};/* * Turn hardware cursor off */void pmagbafb_erase_cursor(struct pmag_ba_ramdac_regs *bt459_regs){	bt459_regs->addr_low = 0;	bt459_regs->addr_hi = 3;	bt459_regs->data = 0;}/* * Set the palette.  */static int pmagbafb_setcolreg(unsigned regno, unsigned red, unsigned green,                              unsigned blue, unsigned transp,                              struct fb_info *info){	struct pmag_ba_ramdac_regs *bt459_regs = (struct pmag_ba_ramdac_regs *) info->par; 	if (regno >= info->cmap.len)		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 */	bt459_regs->addr_low = (__u8) regno;	bt459_regs->addr_hi = 0;	bt459_regs->cmap = red;	bt459_regs->cmap = green;	bt459_regs->cmap = blue;	return 0;}static struct fb_ops pmagbafb_ops = {	.owner		= THIS_MODULE,	.fb_setcolreg	= pmagbafb_setcolreg,	.fb_fillrect	= cfb_fillrect,	.fb_copyarea	= cfb_copyarea,	.fb_imageblit	= cfb_imageblit,	.fb_cursor	= soft_cursor,};int __init pmagbafb_init_one(int slot){	unsigned long base_addr = get_tc_base_addr(slot);	struct fb_info *info = &pmagba_fb_info[slot]; 	printk("PMAG-BA framebuffer in slot %d\n", slot);	/*	 * Framebuffer display memory base address and friends	 */	pmagbafb_fix.smem_start = base_addr + PMAG_BA_ONBOARD_FBMEM_OFFSET;	info->par = (base_addr + PMAG_BA_BT459_OFFSET);	/*	 * Configure the Bt459 RAM DAC	 */	pmagbafb_erase_cursor((struct pmag_ba_ramdac_regs *) info->par);	/*	 *      Let there be consoles..	 */	info->fbops = &pmagbafb_ops;	info->var = pmagbafb_defined;	info->fix = pmagbafb_fix; 	info->screen_base = pmagbafb_fix.smem_start;	info->flags = FBINFO_DEFAULT;	fb_alloc_cmap(&fb_info.cmap, 256, 0);		if (register_framebuffer(info) < 0)		return 1;	return 0;}/*  * Initialise the framebuffer */int __init pmagbafb_init(void){	int sid;	int found = 0;	if (fb_get_options("pmagbafb", NULL))		return -ENODEV;	if (TURBOCHANNEL) {		while ((sid = search_tc_card("PMAG-BA")) >= 0) {			found = 1;			claim_tc_card(sid);			pmagbafb_init_one(sid);		}		return found ? 0 : -ENODEV;	} else {		return -ENODEV;	}}module_init(pmagbafb_init);MODULE_LICENSE("GPL");