[deliverable/linux.git] / drivers / video / fbdev / maxinefb.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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/video/maxinefb.c
	3	*
	4	* DECstation 5000/xx onboard framebuffer support ... derived from:
	5	* "HP300 Topcat framebuffer support (derived from macfb of all things)
	6	* Phil Blundell <philb@gnu.org> 1998", the original code can be
	7	* found in the file hpfb.c in the same directory.
	8	*
	9	* DECstation related code Copyright (C) 1999,2000,2001 by
	10	* Michael Engel <engel@unix-ag.org> and
	11	* Karsten Merker <merker@linuxtag.org>.
	12	* This file is subject to the terms and conditions of the GNU General
	13	* Public License. See the file COPYING in the main directory of this
	14	* archive for more details.
	15	*
	16	*/
	17
	18	/*
	19	* Changes:
	20	* 2001/01/27 removed debugging and testing code, fixed fb_ops
	21	* initialization which had caused a crash before,
	22	* general cleanup, first official release (KM)
	23	*
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/kernel.h>
1da177e4 LT	28	#include <linux/errno.h>
	29	#include <linux/string.h>
	30	#include <linux/mm.h>
1da177e4 LT	31	#include <linux/delay.h>
	32	#include <linux/init.h>
	33	#include <linux/fb.h>
	34	#include <video/maxinefb.h>
	35
	36	/* bootinfo.h defines the machine type values, needed when checking */
	37	/* whether are really running on a maxine, KM */
	38	#include <asm/bootinfo.h>
	39
	40	static struct fb_info fb_info;
	41
	42	static struct fb_var_screeninfo maxinefb_defined = {
	43	.xres = 1024,
	44	.yres = 768,
	45	.xres_virtual = 1024,
	46	.yres_virtual = 768,
	47	.bits_per_pixel =8,
	48	.activate = FB_ACTIVATE_NOW,
	49	.height = -1,
	50	.width = -1,
	51	.vmode = FB_VMODE_NONINTERLACED,
	52	};
	53
	54	static struct fb_fix_screeninfo maxinefb_fix = {
8fd66ab8	55	.id = "Maxine",
1da177e4 LT	56	.smem_len = (1024*768),
	57	.type = FB_TYPE_PACKED_PIXELS,
	58	.visual = FB_VISUAL_PSEUDOCOLOR,
	59	.line_length = 1024,
	60	};
	61
	62	/* Handle the funny Inmos RamDAC/video controller ... */
	63
	64	void maxinefb_ims332_write_register(int regno, register unsigned int val)
	65	{
	66	register unsigned char regs = (char ) MAXINEFB_IMS332_ADDRESS;
	67	unsigned char *wptr;
	68
	69	wptr = regs + 0xa0000 + (regno << 4);
	70	((volatile unsigned int ) (regs)) = (val >> 8) & 0xff00;
	71	((volatile unsigned short ) (wptr)) = val;
	72	}
	73
	74	unsigned int maxinefb_ims332_read_register(int regno)
	75	{
	76	register unsigned char regs = (char ) MAXINEFB_IMS332_ADDRESS;
	77	unsigned char *rptr;
	78	register unsigned int j, k;
	79
	80	rptr = regs + 0x80000 + (regno << 4);
	81	j = ((volatile unsigned short ) rptr);
	82	k = ((volatile unsigned short ) regs);
	83
	84	return (j & 0xffff) \| ((k & 0xff00) << 8);
	85	}
	86
	87	/* Set the palette */
	88	static int maxinefb_setcolreg(unsigned regno, unsigned red, unsigned green,
	89	unsigned blue, unsigned transp, struct fb_info *info)
	90	{
	91	/* value to be written into the palette reg. */
	92	unsigned long hw_colorvalue = 0;
	93
2f390380 KH	94	if (regno > 255)
	95	return 1;
	96
1da177e4 LT	97	red >>= 8; /* The cmap fields are 16 bits */
	98	green >>= 8; /* wide, but the harware colormap */
	99	blue >>= 8; /* registers are only 8 bits wide */
	100
	101	hw_colorvalue = (blue << 16) + (green << 8) + (red);
	102
	103	maxinefb_ims332_write_register(IMS332_REG_COLOR_PALETTE + regno,
	104	hw_colorvalue);
	105	return 0;
	106	}
	107
	108	static struct fb_ops maxinefb_ops = {
	109	.owner = THIS_MODULE,
1da177e4 LT	110	.fb_setcolreg = maxinefb_setcolreg,
	111	.fb_fillrect = cfb_fillrect,
	112	.fb_copyarea = cfb_copyarea,
	113	.fb_imageblit = cfb_imageblit,
1da177e4 LT	114	};
	115
	116	int __init maxinefb_init(void)
	117	{
	118	unsigned long fboff;
	119	unsigned long fb_start;
	120	int i;
	121
	122	if (fb_get_options("maxinefb", NULL))
	123	return -ENODEV;
	124
	125	/* Validate we're on the proper machine type */
	126	if (mips_machtype != MACH_DS5000_XX) {
	127	return -EINVAL;
	128	}
	129
	130	printk(KERN_INFO "Maxinefb: Personal DECstation detected\n");
	131	printk(KERN_INFO "Maxinefb: initializing onboard framebuffer\n");
	132
	133	/* Framebuffer display memory base address */
	134	fb_start = DS5000_xx_ONBOARD_FBMEM_START;
	135
	136	/* Clear screen */
	137	for (fboff = fb_start; fboff < fb_start + 0x1ffff; fboff++)
	138	(volatile unsigned char )fboff = 0x0;
	139
	140	maxinefb_fix.smem_start = fb_start;
	141
	142	/* erase hardware cursor */
	143	for (i = 0; i < 512; i++) {
	144	maxinefb_ims332_write_register(IMS332_REG_CURSOR_RAM + i,
	145	0);
	146	/*
	147	if (i&0x8 == 0)
	148	maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0x0f);
	149	else
	150	maxinefb_ims332_write_register (IMS332_REG_CURSOR_RAM + i, 0xf0);
	151	*/
	152	}
	153
	154	fb_info.fbops = &maxinefb_ops;
	155	fb_info.screen_base = (char *)maxinefb_fix.smem_start;
	156	fb_info.var = maxinefb_defined;
	157	fb_info.fix = maxinefb_fix;
	158	fb_info.flags = FBINFO_DEFAULT;
	159
	160	fb_alloc_cmap(&fb_info.cmap, 256, 0);
	161
	162	if (register_framebuffer(&fb_info) < 0)
	163	return 1;
	164	return 0;
	165	}
	166
	167	static void __exit maxinefb_exit(void)
	168	{
	169	unregister_framebuffer(&fb_info);
	170	}
	171
	172	#ifdef MODULE
	173	MODULE_LICENSE("GPL");
	174	#endif
	175	module_init(maxinefb_init);
	176	module_exit(maxinefb_exit);
	177