[deliverable/linux.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);
	}
}

static int __devinit bw2_probe(struct of_device *op, const struct of_device_id *match)
{
	struct device_node *dp = op->node;
	struct fb_info *info;
	struct bw2_par *par;
	int linebytes, err;

	info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);

	err = -ENOMEM;
	if (!info)
		goto out_err;
	par = info->par;

	spin_lock_init(&par->lock);

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

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

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

	par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
			       sizeof(struct bw2_regs), "bw2 regs");
	if (!par->regs)
		goto out_release_fb;

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

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

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

	info->screen_base = of_ioremap(&op->resource[0], 0,
				       par->fbsize, "bw2 ram");
	if (!info->screen_base)
		goto out_unmap_regs;

	bw2_blank(0, info);

	bw2_init_fix(info, linebytes);

	err = register_framebuffer(info);
	if (err < 0)
		goto out_unmap_screen;

	dev_set_drvdata(&op->dev, info);

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

	return 0;

out_unmap_screen:
	of_iounmap(&op->resource[0], info->screen_base, par->fbsize);

out_unmap_regs:
	of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));

out_release_fb:
	framebuffer_release(info);

out_err:
	return err;
}

static int __devexit bw2_remove(struct of_device *op)
{
	struct fb_info *info = dev_get_drvdata(&op->dev);
	struct bw2_par *par = info->par;

	unregister_framebuffer(info);

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

	framebuffer_release(info);

	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
c7f439b9	282	static int __devinit bw2_probe(struct of_device op, const struct of_device_id match)
1da177e4	283	{
50312ce9	284	struct device_node *dp = op->node;
c7f439b9 DM	285	struct fb_info *info;
c7f439b9 DM	286	struct bw2_par *par;
50312ce9	287	int linebytes, err;
1da177e4	288
c7f439b9	289	info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);
1da177e4	290
c7f439b9 DM	291	err = -ENOMEM;
	292	if (!info)
	293	goto out_err;
	294	par = info->par;
50312ce9	295
c7f439b9	296	spin_lock_init(&par->lock);
50312ce9	297
c7f439b9 DM	298	par->physbase = op->resource[0].start;
	299	par->which_io = op->resource[0].flags & IORESOURCE_BITS;
	300
	301	sbusfb_fill_var(&info->var, dp->node, 1);
50312ce9	302	linebytes = of_getintprop_default(dp, "linebytes",
c7f439b9	303	info->var.xres);
50312ce9	304
c7f439b9 DM	305	info->var.red.length = info->var.green.length =
	306	info->var.blue.length = info->var.bits_per_pixel;
	307	info->var.red.offset = info->var.green.offset =
	308	info->var.blue.offset = 0;
1da177e4	309
c7f439b9 DM	310	par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
	311	sizeof(struct bw2_regs), "bw2 regs");
	312	if (!par->regs)
	313	goto out_release_fb;
1da177e4	314
50312ce9	315	if (!of_find_property(dp, "width", NULL))
c7f439b9	316	bw2_do_default_mode(par, info, &linebytes);
1da177e4	317
c7f439b9	318	par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
1da177e4	319
c7f439b9 DM	320	info->flags = FBINFO_DEFAULT;
c7f439b9 DM	321	info->fbops = &bw2_ops;
50312ce9	322
c7f439b9 DM	323	info->screen_base = of_ioremap(&op->resource[0], 0,
	324	par->fbsize, "bw2 ram");
	325	if (!info->screen_base)
	326	goto out_unmap_regs;
1da177e4	327
c7f439b9	328	bw2_blank(0, info);
1da177e4	329
c7f439b9	330	bw2_init_fix(info, linebytes);
1da177e4	331
c7f439b9 DM	332	err = register_framebuffer(info);
	333	if (err < 0)
	334	goto out_unmap_screen;
1da177e4	335
c7f439b9	336	dev_set_drvdata(&op->dev, info);
50312ce9 DM	337
50312ce9 DM	338	printk("%s: bwtwo at %lx:%lx\n",
c7f439b9	339	dp->full_name, par->which_io, par->physbase);
1da177e4	340
50312ce9	341	return 0;
1da177e4	342
c7f439b9 DM	343	out_unmap_screen:
	344	of_iounmap(&op->resource[0], info->screen_base, par->fbsize);
	345
	346	out_unmap_regs:
	347	of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
	348
	349	out_release_fb:
	350	framebuffer_release(info);
1da177e4	351
c7f439b9 DM	352	out_err:
c7f439b9 DM	353	return err;
50312ce9	354	}
1da177e4	355
e3a411a3	356	static int __devexit bw2_remove(struct of_device *op)
50312ce9	357	{
c7f439b9 DM	358	struct fb_info *info = dev_get_drvdata(&op->dev);
c7f439b9 DM	359	struct bw2_par *par = info->par;
50312ce9	360
c7f439b9	361	unregister_framebuffer(info);
50312ce9	362
c7f439b9 DM	363	of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
c7f439b9 DM	364	of_iounmap(&op->resource[0], info->screen_base, par->fbsize);
50312ce9	365
c7f439b9	366	framebuffer_release(info);
50312ce9	367
e3a411a3	368	dev_set_drvdata(&op->dev, NULL);
1da177e4 LT	369
	370	return 0;
	371	}
	372
50312ce9 DM	373	static struct of_device_id bw2_match[] = {
	374	{
	375	.name = "bwtwo",
	376	},
	377	{},
	378	};
	379	MODULE_DEVICE_TABLE(of, bw2_match);
1da177e4	380
50312ce9 DM	381	static struct of_platform_driver bw2_driver = {
	382	.name = "bw2",
	383	.match_table = bw2_match,
	384	.probe = bw2_probe,
	385	.remove = __devexit_p(bw2_remove),
	386	};
1da177e4	387
50312ce9 DM	388	static int __init bw2_init(void)
	389	{
	390	if (fb_get_options("bw2fb", NULL))
	391	return -ENODEV;
	392
	393	return of_register_driver(&bw2_driver, &of_bus_type);
1da177e4 LT	394	}
1da177e4 LT	395
50312ce9	396	static void __exit bw2_exit(void)
1da177e4	397	{
50312ce9	398	return of_unregister_driver(&bw2_driver);
1da177e4 LT	399	}
1da177e4 LT	400
1da177e4	401
50312ce9	402	module_init(bw2_init);
1da177e4	403	module_exit(bw2_exit);
1da177e4 LT	404
1da177e4 LT	405	MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
50312ce9 DM	406	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
50312ce9 DM	407	MODULE_VERSION("2.0");
1da177e4	408	MODULE_LICENSE("GPL");