/* *  linux/drivers/video/fm2fb.c -- BSC FrameMaster II/Rainbow II frame buffer *				   device * *	Copyright (C) 1998 Steffen A. Mork (linux-dev@morknet.de) *	Copyright (C) 1999 Geert Uytterhoeven * *  Written for 2.0.x by Steffen A. Mork *  Ported to 2.1.x by Geert Uytterhoeven *  Ported to new api by James Simmons * *  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/mm.h>#include <linux/fb.h>#include <linux/init.h>#include <linux/zorro.h>#include <asm/io.h> /* *	Some technical notes: * *	The BSC FrameMaster II (or Rainbow II) is a simple very dumb *	frame buffer which allows to display 24 bit true color images. *	Each pixel is 32 bit width so it's very easy to maintain the *	frame buffer. One long word has the following layout: *	AARRGGBB which means: AA the alpha channel byte, RR the red *	channel, GG the green channel and BB the blue channel. * *	The FrameMaster II supports the following video modes. *	- PAL/NTSC *	- interlaced/non interlaced *	- composite sync/sync/sync over green * *	The resolution is to the following both ones: *	- 768x576 (PAL) *	- 768x480 (NTSC) * *	This means that pixel access per line is fixed due to the *	fixed line width. In case of maximal resolution the frame *	buffer needs an amount of memory of 1.769.472 bytes which *	is near to 2 MByte (the allocated address space of Zorro2). *	The memory is channel interleaved. That means every channel *	owns four VRAMs. Unfortunately most FrameMasters II are *	not assembled with memory for the alpha channel. In this *	case it could be possible to add the frame buffer into the *	normal memory pool. * *	At relative address 0x1ffff8 of the frame buffers base address *	there exists a control register with the number of *	four control bits. They have the following meaning: *	bit value meaning * *	 0    1   0=interlaced/1=non interlaced *	 1    2   0=video out disabled/1=video out enabled *	 2    4   0=normal mode as jumpered via JP8/1=complement mode *	 3    8   0=read  onboard ROM/1 normal operation (required) * *	As mentioned above there are several jumper. I think there *	is not very much information about the FrameMaster II in *	the world so I add these information for completeness. * *	JP1  interlace selection (1-2 non interlaced/2-3 interlaced) *	JP2  wait state creation (leave as is!) *	JP3  wait state creation (leave as is!) *	JP4  modulate composite sync on green output (1-2 composite *	     sync on green channel/2-3 normal composite sync) *	JP5  create test signal, shorting this jumper will create *	     a white screen *	JP6  sync creation (1-2 composite sync/2-3 H-sync output) *	JP8  video mode (1-2 PAL/2-3 NTSC) * *	With the following jumpering table you can connect the *	FrameMaster II to a normal TV via SCART connector: *	JP1:  2-3 *	JP4:  2-3 *	JP6:  2-3 *	JP8:  1-2 (means PAL for Europe) * *	NOTE: *	There is no other possibility to change the video timings *	except the interlaced/non interlaced, sync control and the *	video mode PAL (50 Hz)/NTSC (60 Hz). Inside this *	FrameMaster II driver are assumed values to avoid anomalies *	to a future X server. Except the pixel clock is really *	constant at 30 MHz. * *	9 pin female video connector: * *	1  analog red 0.7 Vss *	2  analog green 0.7 Vss *	3  analog blue 0.7 Vss *	4  H-sync TTL *	5  V-sync TTL *	6  ground *	7  ground *	8  ground *	9  ground * *	Some performance notes: *	The FrameMaster II was not designed to display a console *	this driver would do! It was designed to display still true *	color images. Imagine: When scroll up a text line there *	must copied ca. 1.7 MBytes to another place inside this *	frame buffer. This means 1.7 MByte read and 1.7 MByte write *	over the slow 16 bit wide Zorro2 bus! A scroll of one *	line needs 1 second so do not expect to much from this *	driver - he is at the limit! * */ /* *	definitions */ #define FRAMEMASTER_SIZE	0x200000#define FRAMEMASTER_REG		0x1ffff8 #define FRAMEMASTER_NOLACE	1#define FRAMEMASTER_ENABLE	2#define FRAMEMASTER_COMPL	4#define FRAMEMASTER_ROM		8 static volatile unsigned char *fm2fb_reg; static struct fb_fix_screeninfo fb_fix = {	.smem_len =	FRAMEMASTER_REG,	.type =		FB_TYPE_PACKED_PIXELS,	.visual =	FB_VISUAL_TRUECOLOR,	.line_length =	(768 << 2),	.mmio_len =	(8),	.accel =	FB_ACCEL_NONE,}; static int fm2fb_mode = -1; #define FM2FB_MODE_PAL	0#define FM2FB_MODE_NTSC	1 static struct fb_var_screeninfo fb_var_modes[] = {    {	/* 768 x 576, 32 bpp (PAL) */	768, 576, 768, 576, 0, 0, 32, 0,	{ 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 },	0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE,	33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0    }, {	/* 768 x 480, 32 bpp (NTSC - not supported yet */	768, 480, 768, 480, 0, 0, 32, 0,	{ 16, 8, 0 }, { 8, 8, 0 }, { 0, 8, 0 }, { 24, 8, 0 },	0, FB_ACTIVATE_NOW, -1, -1, FB_ACCEL_NONE,	33333, 10, 102, 10, 5, 80, 34, FB_SYNC_COMP_HIGH_ACT, 0    }};     /*     *  Interface used by the world     */ static int fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,                           u_int transp, struct fb_info *info);static int fm2fb_blank(int blank, struct fb_info *info); static const struct fb_ops fm2fb_ops = {	.owner		= THIS_MODULE,	FB_DEFAULT_IOMEM_OPS,	.fb_setcolreg	= fm2fb_setcolreg,	.fb_blank	= fm2fb_blank,};     /*     *  Blank the display.     */static int fm2fb_blank(int blank, struct fb_info *info){	unsigned char t = FRAMEMASTER_ROM; 	if (!blank)		t |= FRAMEMASTER_ENABLE | FRAMEMASTER_NOLACE;	fm2fb_reg[0] = t;	return 0;}     /*     *  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 fm2fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,                         u_int transp, struct fb_info *info){	if (regno < 16) {		red >>= 8;		green >>= 8;		blue >>= 8; 		((u32*)(info->pseudo_palette))[regno] = (red << 16) |			(green << 8) | blue;	} 	return 0;}     /*     *  Initialisation     */ static int fm2fb_probe(struct zorro_dev *z, const struct zorro_device_id *id); static const struct zorro_device_id fm2fb_devices[] = {	{ ZORRO_PROD_BSC_FRAMEMASTER_II },	{ ZORRO_PROD_HELFRICH_RAINBOW_II },	{ 0 }};MODULE_DEVICE_TABLE(zorro, fm2fb_devices); static struct zorro_driver fm2fb_driver = {	.name		= "fm2fb",	.id_table	= fm2fb_devices,	.probe		= fm2fb_probe,}; static int fm2fb_probe(struct zorro_dev *z, const struct zorro_device_id *id){	struct fb_info *info;	unsigned long *ptr;	int is_fm;	int x, y; 	is_fm = z->id == ZORRO_PROD_BSC_FRAMEMASTER_II; 	if (!zorro_request_device(z,"fm2fb"))		return -ENXIO; 	info = framebuffer_alloc(16 * sizeof(u32), &z->dev);	if (!info) {		zorro_release_device(z);		return -ENOMEM;	} 	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {		framebuffer_release(info);		zorro_release_device(z);		return -ENOMEM;	} 	/* assigning memory to kernel space */	fb_fix.smem_start = zorro_resource_start(z);	info->screen_base = ioremap(fb_fix.smem_start, FRAMEMASTER_SIZE);	fb_fix.mmio_start = fb_fix.smem_start + FRAMEMASTER_REG;	fm2fb_reg  = (unsigned char *)(info->screen_base+FRAMEMASTER_REG); 	strcpy(fb_fix.id, is_fm ? "FrameMaster II" : "Rainbow II"); 	/* make EBU color bars on display */	ptr = (unsigned long *)fb_fix.smem_start;	for (y = 0; y < 576; y++) {		for (x = 0; x < 96; x++) *ptr++ = 0xffffff;/* white */		for (x = 0; x < 96; x++) *ptr++ = 0xffff00;/* yellow */		for (x = 0; x < 96; x++) *ptr++ = 0x00ffff;/* cyan */		for (x = 0; x < 96; x++) *ptr++ = 0x00ff00;/* green */		for (x = 0; x < 96; x++) *ptr++ = 0xff00ff;/* magenta */		for (x = 0; x < 96; x++) *ptr++ = 0xff0000;/* red */		for (x = 0; x < 96; x++) *ptr++ = 0x0000ff;/* blue */		for (x = 0; x < 96; x++) *ptr++ = 0x000000;/* black */	}	fm2fb_blank(0, info); 	if (fm2fb_mode == -1)		fm2fb_mode = FM2FB_MODE_PAL; 	info->fbops = &fm2fb_ops;	info->var = fb_var_modes[fm2fb_mode];	info->pseudo_palette = info->par;	info->par = NULL;	info->fix = fb_fix; 	if (register_framebuffer(info) < 0) {		fb_dealloc_cmap(&info->cmap);		iounmap(info->screen_base);		framebuffer_release(info);		zorro_release_device(z);		return -EINVAL;	}	fb_info(info, "%s frame buffer device\n", fb_fix.id);	return 0;} static int __init fm2fb_setup(char *options){	char *this_opt; 	if (!options || !*options)		return 0; 	while ((this_opt = strsep(&options, ",")) != NULL) {		if (!strncmp(this_opt, "pal", 3))			fm2fb_mode = FM2FB_MODE_PAL;		else if (!strncmp(this_opt, "ntsc", 4))			fm2fb_mode = FM2FB_MODE_NTSC;	}	return 0;} static int __init fm2fb_init(void){	char *option = NULL; 	if (fb_get_options("fm2fb", &option))		return -ENODEV;	fm2fb_setup(option);	return zorro_register_driver(&fm2fb_driver);} module_init(fm2fb_init);MODULE_LICENSE("GPL");