[mirror_ubuntu-bionic-kernel.git] / drivers / video / bw2.c

/* bw2.c: BWTWO frame buffer driver
 *
 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
 *
 * Driver layout based loosely on tgafb.c, see that file for credits.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>

#include <asm/io.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/fbio.h>

#include "sbuslib.h"

/*
 * Local functions.
 */

static int bw2_blank(int, struct fb_info *);

static int bw2_mmap(struct fb_info *, struct vm_area_struct *);
static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);

/*
 *  Frame buffer operations
 */

static struct fb_ops bw2_ops = {
	.owner			= THIS_MODULE,
	.fb_blank		= bw2_blank,
	.fb_fillrect		= cfb_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cfb_imageblit,
	.fb_mmap		= bw2_mmap,
	.fb_ioctl		= bw2_ioctl,
#ifdef CONFIG_COMPAT
	.fb_compat_ioctl	= sbusfb_compat_ioctl,
#endif
};

/* OBio addresses for the bwtwo registers */
#define BWTWO_REGISTER_OFFSET 0x400000

struct bt_regs {
	u32 addr;
	u32 color_map;
	u32 control;
	u32 cursor;
};

struct bw2_regs {
	struct bt_regs	cmap;
	u8	control;
	u8	status;
	u8	cursor_start;
	u8	cursor_end;
	u8	h_blank_start;
	u8	h_blank_end;
	u8	h_sync_start;
	u8	h_sync_end;
	u8	comp_sync_end;
	u8	v_blank_start_high;
	u8	v_blank_start_low;
	u8	v_blank_end;
	u8	v_sync_start;
	u8	v_sync_end;
	u8	xfer_holdoff_start;
	u8	xfer_holdoff_end;
};

/* Status Register Constants */
#define BWTWO_SR_RES_MASK	0x70
#define BWTWO_SR_1600_1280	0x50
#define BWTWO_SR_1152_900_76_A	0x40
#define BWTWO_SR_1152_900_76_B	0x60
#define BWTWO_SR_ID_MASK	0x0f
#define BWTWO_SR_ID_MONO	0x02
#define BWTWO_SR_ID_MONO_ECL	0x03
#define BWTWO_SR_ID_MSYNC	0x04
#define BWTWO_SR_ID_NOCONN	0x0a

/* Control Register Constants */
#define BWTWO_CTL_ENABLE_INTS   0x80
#define BWTWO_CTL_ENABLE_VIDEO  0x40
#define BWTWO_CTL_ENABLE_TIMING 0x20
#define BWTWO_CTL_ENABLE_CURCMP 0x10
#define BWTWO_CTL_XTAL_MASK     0x0C
#define BWTWO_CTL_DIVISOR_MASK  0x03

/* Status Register Constants */
#define BWTWO_STAT_PENDING_INT  0x80
#define BWTWO_STAT_MSENSE_MASK  0x70
#define BWTWO_STAT_ID_MASK      0x0f

struct bw2_par {
	spinlock_t		lock;
	struct bw2_regs		__iomem *regs;

	u32			flags;
#define BW2_FLAG_BLANKED	0x00000001

	unsigned long		physbase;
	unsigned long		which_io;
	unsigned long		fbsize;
};

/**
 *      bw2_blank - Optional function.  Blanks the display.
 *      @blank_mode: the blank mode we want.
 *      @info: frame buffer structure that represents a single frame buffer
 */
static int
bw2_blank(int blank, struct fb_info *info)
{
	struct bw2_par *par = (struct bw2_par *) info->par;
	struct bw2_regs __iomem *regs = par->regs;
	unsigned long flags;
	u8 val;

	spin_lock_irqsave(&par->lock, flags);

	switch (blank) {
	case FB_BLANK_UNBLANK: /* Unblanking */
		val = sbus_readb(&regs->control);
		val |= BWTWO_CTL_ENABLE_VIDEO;
		sbus_writeb(val, &regs->control);
		par->flags &= ~BW2_FLAG_BLANKED;
		break;

	case FB_BLANK_NORMAL: /* Normal blanking */
	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
	case FB_BLANK_POWERDOWN: /* Poweroff */
		val = sbus_readb(&regs->control);
		val &= ~BWTWO_CTL_ENABLE_VIDEO;
		sbus_writeb(val, &regs->control);
		par->flags |= BW2_FLAG_BLANKED;
		break;
	}

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

static struct sbus_mmap_map bw2_mmap_map[] = {
	{
		.size = SBUS_MMAP_FBSIZE(1)
	},
	{ .size = 0 }
};

static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct bw2_par *par = (struct bw2_par *)info->par;

	return sbusfb_mmap_helper(bw2_mmap_map,
				  par->physbase, par->fbsize,
				  par->which_io,
				  vma);
}

static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
{
	struct bw2_par *par = (struct bw2_par *) info->par;

	return sbusfb_ioctl_helper(cmd, arg, info,
				   FBTYPE_SUN2BW, 1, par->fbsize);
}

/*
 *  Initialisation
 */

static void __devinit bw2_init_fix(struct fb_info *info, int linebytes)
{
	strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));

	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = FB_VISUAL_MONO01;

	info->fix.line_length = linebytes;

	info->fix.accel = FB_ACCEL_SUN_BWTWO;
}

static u8 bw2regs_1600[] __devinitdata = {
	0x14, 0x8b,	0x15, 0x28,	0x16, 0x03,	0x17, 0x13,
	0x18, 0x7b,	0x19, 0x05,	0x1a, 0x34,	0x1b, 0x2e,
	0x1c, 0x00,	0x1d, 0x0a,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x21,	0
};

static u8 bw2regs_ecl[] __devinitdata = {
	0x14, 0x65,	0x15, 0x1e,	0x16, 0x04,	0x17, 0x0c,
	0x18, 0x5e,	0x19, 0x03,	0x1a, 0xa7,	0x1b, 0x23,
	0x1c, 0x00,	0x1d, 0x08,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x20,	0
};

static u8 bw2regs_analog[] __devinitdata = {
	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x03,	0x17, 0x13,
	0x18, 0xb0,	0x19, 0x03,	0x1a, 0xa6,	0x1b, 0x22,
	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x20,	0
};

static u8 bw2regs_76hz[] __devinitdata = {
	0x14, 0xb7,	0x15, 0x27,	0x16, 0x03,	0x17, 0x0f,
	0x18, 0xae,	0x19, 0x03,	0x1a, 0xae,	0x1b, 0x2a,
	0x1c, 0x01,	0x1d, 0x09,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x24,	0
};

static u8 bw2regs_66hz[] __devinitdata = {
	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x04,	0x17, 0x14,
	0x18, 0xae,	0x19, 0x03,	0x1a, 0xa8,	0x1b, 0x24,
	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x20,	0
};

static void __devinit bw2_do_default_mode(struct bw2_par *par,
					  struct fb_info *info,
					  int *linebytes)
{
	u8 status, mon;
	u8 *p;

	status = sbus_readb(&par->regs->status);
	mon = status & BWTWO_SR_RES_MASK;
	switch (status & BWTWO_SR_ID_MASK) {
	case BWTWO_SR_ID_MONO_ECL:
		if (mon == BWTWO_SR_1600_1280) {
			p = bw2regs_1600;
			info->var.xres = info->var.xres_virtual = 1600;
			info->var.yres = info->var.yres_virtual = 1280;
			*linebytes = 1600 / 8;
		} else
			p = bw2regs_ecl;
		break;

	case BWTWO_SR_ID_MONO:
		p = bw2regs_analog;
		break;

	case BWTWO_SR_ID_MSYNC:
		if (mon == BWTWO_SR_1152_900_76_A ||
		    mon == BWTWO_SR_1152_900_76_B)
			p = bw2regs_76hz;
		else
			p = bw2regs_66hz;
		break;

	case BWTWO_SR_ID_NOCONN:
		return;

	default:
		prom_printf("bw2: can't handle SR %02x\n",
			    status);
		prom_halt();
	}
	for ( ; *p; p += 2) {
		u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
		sbus_writeb(p[1], regp);
	}
}

struct all_info {
	struct fb_info info;
	struct bw2_par par;
};

static int __devinit bw2_init_one(struct of_device *op)
{
	struct device_node *dp = op->node;
	struct all_info *all;
	int linebytes, err;

	all = kzalloc(sizeof(*all), GFP_KERNEL);
	if (!all)
		return -ENOMEM;

	spin_lock_init(&all->par.lock);

	all->par.physbase = op->resource[0].start;
	all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;

	sbusfb_fill_var(&all->info.var, dp->node, 1);
	linebytes = of_getintprop_default(dp, "linebytes",
					  all->info.var.xres);

	all->info.var.red.length = all->info.var.green.length =
		all->info.var.blue.length = all->info.var.bits_per_pixel;
	all->info.var.red.offset = all->info.var.green.offset =
		all->info.var.blue.offset = 0;

	all->par.regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
				   sizeof(struct bw2_regs), "bw2 regs");

	if (!of_find_property(dp, "width", NULL))
		bw2_do_default_mode(&all->par, &all->info, &linebytes);

	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);

	all->info.flags = FBINFO_DEFAULT;
	all->info.fbops = &bw2_ops;

	all->info.screen_base =
		of_ioremap(&op->resource[0], 0, all->par.fbsize, "bw2 ram");
	all->info.par = &all->par;

	bw2_blank(0, &all->info);

	bw2_init_fix(&all->info, linebytes);

	err= register_framebuffer(&all->info);
	if (err < 0) {
		of_iounmap(&op->resource[0],
			   all->par.regs, sizeof(struct bw2_regs));
		of_iounmap(&op->resource[0],
			   all->info.screen_base, all->par.fbsize);
		kfree(all);
		return err;
	}

	dev_set_drvdata(&op->dev, all);

	printk("%s: bwtwo at %lx:%lx\n",
	       dp->full_name,
	       all->par.which_io, all->par.physbase);

	return 0;
}

static int __devinit bw2_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct of_device *op = to_of_device(&dev->dev);

	return bw2_init_one(op);
}

static int __devexit bw2_remove(struct of_device *op)
{
	struct all_info *all = dev_get_drvdata(&op->dev);

	unregister_framebuffer(&all->info);

	of_iounmap(&op->resource[0], all->par.regs, sizeof(struct bw2_regs));
	of_iounmap(&op->resource[0], all->info.screen_base, all->par.fbsize);

	kfree(all);

	dev_set_drvdata(&op->dev, NULL);

	return 0;
}

static struct of_device_id bw2_match[] = {
	{
		.name = "bwtwo",
	},
	{},
};
MODULE_DEVICE_TABLE(of, bw2_match);

static struct of_platform_driver bw2_driver = {
	.name		= "bw2",
	.match_table	= bw2_match,
	.probe		= bw2_probe,
	.remove		= __devexit_p(bw2_remove),
};

static int __init bw2_init(void)
{
	if (fb_get_options("bw2fb", NULL))
		return -ENODEV;

	return of_register_driver(&bw2_driver, &of_bus_type);
}

static void __exit bw2_exit(void)
{
	return of_unregister_driver(&bw2_driver);
}


module_init(bw2_init);
module_exit(bw2_exit);

MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* bw2.c: BWTWO frame buffer driver
1da177e4 LT	2	*
50312ce9	3	* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
1da177e4 LT	4	* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
	5	* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
	6	* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
	7	*
	8	* Driver layout based loosely on tgafb.c, see that file for credits.
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/kernel.h>
	13	#include <linux/errno.h>
	14	#include <linux/string.h>
	15	#include <linux/slab.h>
	16	#include <linux/delay.h>
	17	#include <linux/init.h>
	18	#include <linux/fb.h>
	19	#include <linux/mm.h>
	20
	21	#include <asm/io.h>
1da177e4	22	#include <asm/oplib.h>
50312ce9 DM	23	#include <asm/prom.h>
50312ce9 DM	24	#include <asm/of_device.h>
1da177e4 LT	25	#include <asm/fbio.h>
1da177e4 LT	26
1da177e4 LT	27	#include "sbuslib.h"
	28
	29	/*
	30	* Local functions.
	31	*/
	32
	33	static int bw2_blank(int, struct fb_info *);
	34
216d526c	35	static int bw2_mmap(struct fb_info , struct vm_area_struct );
67a6680d	36	static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);
1da177e4 LT	37
	38	/*
	39	* Frame buffer operations
	40	*/
	41
	42	static struct fb_ops bw2_ops = {
	43	.owner = THIS_MODULE,
	44	.fb_blank = bw2_blank,
	45	.fb_fillrect = cfb_fillrect,
	46	.fb_copyarea = cfb_copyarea,
	47	.fb_imageblit = cfb_imageblit,
	48	.fb_mmap = bw2_mmap,
	49	.fb_ioctl = bw2_ioctl,
9ffb83bc CH	50	#ifdef CONFIG_COMPAT
	51	.fb_compat_ioctl = sbusfb_compat_ioctl,
	52	#endif
1da177e4 LT	53	};
	54
	55	/* OBio addresses for the bwtwo registers */
	56	#define BWTWO_REGISTER_OFFSET 0x400000
	57
	58	struct bt_regs {
50312ce9 DM	59	u32 addr;
	60	u32 color_map;
	61	u32 control;
	62	u32 cursor;
1da177e4 LT	63	};
	64
	65	struct bw2_regs {
	66	struct bt_regs cmap;
50312ce9 DM	67	u8 control;
	68	u8 status;
	69	u8 cursor_start;
	70	u8 cursor_end;
	71	u8 h_blank_start;
	72	u8 h_blank_end;
	73	u8 h_sync_start;
	74	u8 h_sync_end;
	75	u8 comp_sync_end;
	76	u8 v_blank_start_high;
	77	u8 v_blank_start_low;
	78	u8 v_blank_end;
	79	u8 v_sync_start;
	80	u8 v_sync_end;
	81	u8 xfer_holdoff_start;
	82	u8 xfer_holdoff_end;
1da177e4 LT	83	};
	84
	85	/* Status Register Constants */
	86	#define BWTWO_SR_RES_MASK 0x70
	87	#define BWTWO_SR_1600_1280 0x50
	88	#define BWTWO_SR_1152_900_76_A 0x40
	89	#define BWTWO_SR_1152_900_76_B 0x60
	90	#define BWTWO_SR_ID_MASK 0x0f
	91	#define BWTWO_SR_ID_MONO 0x02
	92	#define BWTWO_SR_ID_MONO_ECL 0x03
	93	#define BWTWO_SR_ID_MSYNC 0x04
	94	#define BWTWO_SR_ID_NOCONN 0x0a
	95
	96	/* Control Register Constants */
	97	#define BWTWO_CTL_ENABLE_INTS 0x80
	98	#define BWTWO_CTL_ENABLE_VIDEO 0x40
	99	#define BWTWO_CTL_ENABLE_TIMING 0x20
	100	#define BWTWO_CTL_ENABLE_CURCMP 0x10
	101	#define BWTWO_CTL_XTAL_MASK 0x0C
	102	#define BWTWO_CTL_DIVISOR_MASK 0x03
	103
	104	/* Status Register Constants */
	105	#define BWTWO_STAT_PENDING_INT 0x80
	106	#define BWTWO_STAT_MSENSE_MASK 0x70
	107	#define BWTWO_STAT_ID_MASK 0x0f
	108
	109	struct bw2_par {
	110	spinlock_t lock;
	111	struct bw2_regs __iomem *regs;
	112
	113	u32 flags;
	114	#define BW2_FLAG_BLANKED 0x00000001
	115
	116	unsigned long physbase;
50312ce9	117	unsigned long which_io;
1da177e4	118	unsigned long fbsize;
1da177e4 LT	119	};
	120
	121	/**
	122	* bw2_blank - Optional function. Blanks the display.
	123	* @blank_mode: the blank mode we want.
	124	* @info: frame buffer structure that represents a single frame buffer
	125	*/
	126	static int
	127	bw2_blank(int blank, struct fb_info *info)
	128	{
	129	struct bw2_par par = (struct bw2_par ) info->par;
	130	struct bw2_regs __iomem *regs = par->regs;
	131	unsigned long flags;
	132	u8 val;
	133
	134	spin_lock_irqsave(&par->lock, flags);
	135
	136	switch (blank) {
	137	case FB_BLANK_UNBLANK: /* Unblanking */
	138	val = sbus_readb(&regs->control);
	139	val \|= BWTWO_CTL_ENABLE_VIDEO;
	140	sbus_writeb(val, &regs->control);
	141	par->flags &= ~BW2_FLAG_BLANKED;
	142	break;
	143
	144	case FB_BLANK_NORMAL: /* Normal blanking */
	145	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
	146	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
	147	case FB_BLANK_POWERDOWN: /* Poweroff */
	148	val = sbus_readb(&regs->control);
	149	val &= ~BWTWO_CTL_ENABLE_VIDEO;
	150	sbus_writeb(val, &regs->control);
	151	par->flags \|= BW2_FLAG_BLANKED;
	152	break;
	153	}
	154
	155	spin_unlock_irqrestore(&par->lock, flags);
	156
	157	return 0;
	158	}
	159
	160	static struct sbus_mmap_map bw2_mmap_map[] = {
	161	{
	162	.size = SBUS_MMAP_FBSIZE(1)
	163	},
	164	{ .size = 0 }
	165	};
	166
216d526c	167	static int bw2_mmap(struct fb_info info, struct vm_area_struct vma)
1da177e4 LT	168	{
	169	struct bw2_par par = (struct bw2_par )info->par;
	170
	171	return sbusfb_mmap_helper(bw2_mmap_map,
	172	par->physbase, par->fbsize,
50312ce9	173	par->which_io,
1da177e4 LT	174	vma);
	175	}
	176
67a6680d	177	static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
1da177e4 LT	178	{
	179	struct bw2_par par = (struct bw2_par ) info->par;
	180
	181	return sbusfb_ioctl_helper(cmd, arg, info,
	182	FBTYPE_SUN2BW, 1, par->fbsize);
	183	}
	184
	185	/*
	186	* Initialisation
	187	*/
	188
63abdcdc	189	static void __devinit bw2_init_fix(struct fb_info *info, int linebytes)
1da177e4 LT	190	{
	191	strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
	192
	193	info->fix.type = FB_TYPE_PACKED_PIXELS;
	194	info->fix.visual = FB_VISUAL_MONO01;
	195
	196	info->fix.line_length = linebytes;
	197
	198	info->fix.accel = FB_ACCEL_SUN_BWTWO;
	199	}
	200
63abdcdc	201	static u8 bw2regs_1600[] __devinitdata = {
1da177e4 LT	202	0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13,
	203	0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e,
	204	0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01,
	205	0x10, 0x21, 0
	206	};
	207
63abdcdc	208	static u8 bw2regs_ecl[] __devinitdata = {
1da177e4 LT	209	0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c,
	210	0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23,
	211	0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01,
	212	0x10, 0x20, 0
	213	};
	214
63abdcdc	215	static u8 bw2regs_analog[] __devinitdata = {
1da177e4 LT	216	0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13,
	217	0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22,
	218	0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
	219	0x10, 0x20, 0
	220	};
	221
63abdcdc	222	static u8 bw2regs_76hz[] __devinitdata = {
1da177e4 LT	223	0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
	224	0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
	225	0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
	226	0x10, 0x24, 0
	227	};
	228
63abdcdc	229	static u8 bw2regs_66hz[] __devinitdata = {
1da177e4 LT	230	0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
	231	0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
	232	0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
	233	0x10, 0x20, 0
	234	};
	235
63abdcdc RR	236	static void __devinit bw2_do_default_mode(struct bw2_par *par,
	237	struct fb_info *info,
	238	int *linebytes)
1da177e4 LT	239	{
	240	u8 status, mon;
	241	u8 *p;
	242
	243	status = sbus_readb(&par->regs->status);
	244	mon = status & BWTWO_SR_RES_MASK;
	245	switch (status & BWTWO_SR_ID_MASK) {
	246	case BWTWO_SR_ID_MONO_ECL:
	247	if (mon == BWTWO_SR_1600_1280) {
	248	p = bw2regs_1600;
	249	info->var.xres = info->var.xres_virtual = 1600;
	250	info->var.yres = info->var.yres_virtual = 1280;
	251	*linebytes = 1600 / 8;
	252	} else
	253	p = bw2regs_ecl;
	254	break;
	255
	256	case BWTWO_SR_ID_MONO:
	257	p = bw2regs_analog;
	258	break;
	259
	260	case BWTWO_SR_ID_MSYNC:
	261	if (mon == BWTWO_SR_1152_900_76_A \|\|
	262	mon == BWTWO_SR_1152_900_76_B)
	263	p = bw2regs_76hz;
	264	else
	265	p = bw2regs_66hz;
	266	break;
	267
	268	case BWTWO_SR_ID_NOCONN:
	269	return;
	270
	271	default:
	272	prom_printf("bw2: can't handle SR %02x\n",
	273	status);
	274	prom_halt();
	275	}
	276	for ( ; *p; p += 2) {
	277	u8 __iomem regp = &((u8 __iomem )par->regs)[p[0]];
	278	sbus_writeb(p[1], regp);
	279	}
	280	}
	281
	282	struct all_info {
	283	struct fb_info info;
	284	struct bw2_par par;
1da177e4	285	};
1da177e4	286
50312ce9	287	static int __devinit bw2_init_one(struct of_device *op)
1da177e4	288	{
50312ce9	289	struct device_node *dp = op->node;
1da177e4	290	struct all_info *all;
50312ce9	291	int linebytes, err;
1da177e4	292
50312ce9 DM	293	all = kzalloc(sizeof(*all), GFP_KERNEL);
	294	if (!all)
	295	return -ENOMEM;
1da177e4 LT	296
1da177e4 LT	297	spin_lock_init(&all->par.lock);
50312ce9 DM	298
	299	all->par.physbase = op->resource[0].start;
	300	all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;
	301
	302	sbusfb_fill_var(&all->info.var, dp->node, 1);
	303	linebytes = of_getintprop_default(dp, "linebytes",
	304	all->info.var.xres);
	305
1da177e4 LT	306	all->info.var.red.length = all->info.var.green.length =
	307	all->info.var.blue.length = all->info.var.bits_per_pixel;
	308	all->info.var.red.offset = all->info.var.green.offset =
	309	all->info.var.blue.offset = 0;
	310
50312ce9 DM	311	all->par.regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
50312ce9 DM	312	sizeof(struct bw2_regs), "bw2 regs");
1da177e4	313
50312ce9	314	if (!of_find_property(dp, "width", NULL))
1da177e4 LT	315	bw2_do_default_mode(&all->par, &all->info, &linebytes);
	316
	317	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
	318
	319	all->info.flags = FBINFO_DEFAULT;
	320	all->info.fbops = &bw2_ops;
50312ce9 DM	321
50312ce9 DM	322	all->info.screen_base =
e3a411a3	323	of_ioremap(&op->resource[0], 0, all->par.fbsize, "bw2 ram");
1da177e4 LT	324	all->info.par = &all->par;
	325
	326	bw2_blank(0, &all->info);
	327
	328	bw2_init_fix(&all->info, linebytes);
	329
50312ce9 DM	330	err= register_framebuffer(&all->info);
50312ce9 DM	331	if (err < 0) {
e3a411a3 DM	332	of_iounmap(&op->resource[0],
	333	all->par.regs, sizeof(struct bw2_regs));
	334	of_iounmap(&op->resource[0],
	335	all->info.screen_base, all->par.fbsize);
1da177e4	336	kfree(all);
50312ce9	337	return err;
1da177e4 LT	338	}
1da177e4 LT	339
50312ce9 DM	340	dev_set_drvdata(&op->dev, all);
	341
	342	printk("%s: bwtwo at %lx:%lx\n",
	343	dp->full_name,
	344	all->par.which_io, all->par.physbase);
1da177e4	345
50312ce9	346	return 0;
1da177e4 LT	347	}
1da177e4 LT	348
50312ce9	349	static int __devinit bw2_probe(struct of_device dev, const struct of_device_id match)
1da177e4	350	{
50312ce9	351	struct of_device *op = to_of_device(&dev->dev);
1da177e4	352
50312ce9 DM	353	return bw2_init_one(op);
50312ce9 DM	354	}
1da177e4	355
e3a411a3	356	static int __devexit bw2_remove(struct of_device *op)
50312ce9	357	{
e3a411a3	358	struct all_info *all = dev_get_drvdata(&op->dev);
50312ce9 DM	359
	360	unregister_framebuffer(&all->info);
	361
e3a411a3 DM	362	of_iounmap(&op->resource[0], all->par.regs, sizeof(struct bw2_regs));
e3a411a3 DM	363	of_iounmap(&op->resource[0], all->info.screen_base, all->par.fbsize);
50312ce9 DM	364
	365	kfree(all);
	366
e3a411a3	367	dev_set_drvdata(&op->dev, NULL);
1da177e4 LT	368
	369	return 0;
	370	}
	371
50312ce9 DM	372	static struct of_device_id bw2_match[] = {
	373	{
	374	.name = "bwtwo",
	375	},
	376	{},
	377	};
	378	MODULE_DEVICE_TABLE(of, bw2_match);
1da177e4	379
50312ce9 DM	380	static struct of_platform_driver bw2_driver = {
	381	.name = "bw2",
	382	.match_table = bw2_match,
	383	.probe = bw2_probe,
	384	.remove = __devexit_p(bw2_remove),
	385	};
1da177e4	386
50312ce9 DM	387	static int __init bw2_init(void)
	388	{
	389	if (fb_get_options("bw2fb", NULL))
	390	return -ENODEV;
	391
	392	return of_register_driver(&bw2_driver, &of_bus_type);
1da177e4 LT	393	}
1da177e4 LT	394
50312ce9	395	static void __exit bw2_exit(void)
1da177e4	396	{
50312ce9	397	return of_unregister_driver(&bw2_driver);
1da177e4 LT	398	}
1da177e4 LT	399
1da177e4	400
50312ce9	401	module_init(bw2_init);
1da177e4	402	module_exit(bw2_exit);
1da177e4 LT	403
1da177e4 LT	404	MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
50312ce9 DM	405	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
50312ce9 DM	406	MODULE_VERSION("2.0");
1da177e4	407	MODULE_LICENSE("GPL");