[linux.git] / drivers / video / cg3.c

/* cg3.c: CGTHREE frame buffer driver
 *
 * Copyright (C) 2003 David S. Miller ([email protected])
 * Copyright (C) 1996,1998 Jakub Jelinek ([email protected])
 * Copyright (C) 1996 Miguel de Icaza ([email protected])
 * Copyright (C) 1997 Eddie C. Dost ([email protected])
 *
 * 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/sbus.h>
#include <asm/oplib.h>
#include <asm/fbio.h>

#include "sbuslib.h"

/*
 * Local functions.
 */

static int cg3_setcolreg(unsigned, unsigned, unsigned, unsigned,
			 unsigned, struct fb_info *);
static int cg3_blank(int, struct fb_info *);

static int cg3_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
static int cg3_ioctl(struct inode *, struct file *, unsigned int,
		     unsigned long, struct fb_info *);

/*
 *  Frame buffer operations
 */

static struct fb_ops cg3_ops = {
	.owner			= THIS_MODULE,
	.fb_setcolreg		= cg3_setcolreg,
	.fb_blank		= cg3_blank,
	.fb_fillrect		= cfb_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cfb_imageblit,
	.fb_mmap		= cg3_mmap,
	.fb_ioctl		= cg3_ioctl,
#ifdef CONFIG_COMPAT
	.fb_compat_ioctl	= sbusfb_compat_ioctl,
#endif
};


/* Control Register Constants */
#define CG3_CR_ENABLE_INTS      0x80
#define CG3_CR_ENABLE_VIDEO     0x40
#define CG3_CR_ENABLE_TIMING    0x20
#define CG3_CR_ENABLE_CURCMP    0x10
#define CG3_CR_XTAL_MASK        0x0c
#define CG3_CR_DIVISOR_MASK     0x03

/* Status Register Constants */
#define CG3_SR_PENDING_INT      0x80
#define CG3_SR_RES_MASK         0x70
#define CG3_SR_1152_900_76_A    0x40
#define CG3_SR_1152_900_76_B    0x60
#define CG3_SR_ID_MASK          0x0f
#define CG3_SR_ID_COLOR         0x01
#define CG3_SR_ID_MONO          0x02
#define CG3_SR_ID_MONO_ECL      0x03

enum cg3_type {
	CG3_AT_66HZ = 0,
	CG3_AT_76HZ,
	CG3_RDI
};

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

struct cg3_regs {
	struct bt_regs	cmap;
	volatile u8	control;
	volatile u8	status;
	volatile u8	cursor_start;
	volatile u8	cursor_end;
	volatile u8	h_blank_start;
	volatile u8	h_blank_end;
	volatile u8	h_sync_start;
	volatile u8	h_sync_end;
	volatile u8	comp_sync_end;
	volatile u8	v_blank_start_high;
	volatile u8	v_blank_start_low;
	volatile u8	v_blank_end;
	volatile u8	v_sync_start;
	volatile u8	v_sync_end;
	volatile u8	xfer_holdoff_start;
	volatile u8	xfer_holdoff_end;
};

/* Offset of interesting structures in the OBIO space */
#define CG3_REGS_OFFSET	     0x400000UL
#define CG3_RAM_OFFSET	     0x800000UL

struct cg3_par {
	spinlock_t		lock;
	struct cg3_regs		__iomem *regs;
	u32			sw_cmap[((256 * 3) + 3) / 4];

	u32			flags;
#define CG3_FLAG_BLANKED	0x00000001
#define CG3_FLAG_RDI		0x00000002

	unsigned long		physbase;
	unsigned long		fbsize;

	struct sbus_dev		*sdev;
};

/**
 *      cg3_setcolreg - Optional function. Sets a color register.
 *      @regno: boolean, 0 copy local, 1 get_user() function
 *      @red: frame buffer colormap structure
 *      @green: The green value which can be up to 16 bits wide
 *      @blue:  The blue value which can be up to 16 bits wide.
 *      @transp: If supported the alpha value which can be up to 16 bits wide.
 *      @info: frame buffer info structure
 *
 * The cg3 palette is loaded with 4 color values at each time
 * so you end up with: (rgb)(r), (gb)(rg), (b)(rgb), and so on.
 * We keep a sw copy of the hw cmap to assist us in this esoteric
 * loading procedure.
 */
static int cg3_setcolreg(unsigned regno,
			 unsigned red, unsigned green, unsigned blue,
			 unsigned transp, struct fb_info *info)
{
	struct cg3_par *par = (struct cg3_par *) info->par;
	struct bt_regs __iomem *bt = &par->regs->cmap;
	unsigned long flags;
	u32 *p32;
	u8 *p8;
	int count;

	if (regno >= 256)
		return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;

	spin_lock_irqsave(&par->lock, flags);

	p8 = (u8 *)par->sw_cmap + (regno * 3);
	p8[0] = red;
	p8[1] = green;
	p8[2] = blue;

#define D4M3(x) ((((x)>>2)<<1) + ((x)>>2))      /* (x/4)*3 */
#define D4M4(x) ((x)&~0x3)                      /* (x/4)*4 */

	count = 3;
	p32 = &par->sw_cmap[D4M3(regno)];
	sbus_writel(D4M4(regno), &bt->addr);
	while (count--)
		sbus_writel(*p32++, &bt->color_map);

#undef D4M3
#undef D4M4

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

/**
 *      cg3_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
cg3_blank(int blank, struct fb_info *info)
{
	struct cg3_par *par = (struct cg3_par *) info->par;
	struct cg3_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 |= CG3_CR_ENABLE_VIDEO;
		sbus_writeb(val, &regs->control);
		par->flags &= ~CG3_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 &= ~CG3_CR_ENABLE_VIDEO;
		sbus_writeb(val, &regs->control);
		par->flags |= CG3_FLAG_BLANKED;
		break;
	}

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

static struct sbus_mmap_map cg3_mmap_map[] = {
	{
		.voff	= CG3_MMAP_OFFSET,
		.poff	= CG3_RAM_OFFSET,
		.size	= SBUS_MMAP_FBSIZE(1)
	},
	{ .size = 0 }
};

static int cg3_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
{
	struct cg3_par *par = (struct cg3_par *)info->par;

	return sbusfb_mmap_helper(cg3_mmap_map,
				  par->physbase, par->fbsize,
				  par->sdev->reg_addrs[0].which_io,
				  vma);
}

static int cg3_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
		     unsigned long arg, struct fb_info *info)
{
	struct cg3_par *par = (struct cg3_par *) info->par;

	return sbusfb_ioctl_helper(cmd, arg, info,
				   FBTYPE_SUN3COLOR, 8, par->fbsize);
}

/*
 *  Initialisation
 */

static void
cg3_init_fix(struct fb_info *info, int linebytes)
{
	struct cg3_par *par = (struct cg3_par *)info->par;

	strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id));

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

	info->fix.line_length = linebytes;

	info->fix.accel = FB_ACCEL_SUN_CGTHREE;
}

static void cg3_rdi_maybe_fixup_var(struct fb_var_screeninfo *var,
				    struct sbus_dev *sdev)
{
	char buffer[40];
	char *p;
	int ww, hh;

	*buffer = 0;
	prom_getstring(sdev->prom_node, "params", buffer, sizeof(buffer));
	if (*buffer) {
		ww = simple_strtoul(buffer, &p, 10);
		if (ww && *p == 'x') {
			hh = simple_strtoul(p + 1, &p, 10);
			if (hh && *p == '-') {
				if (var->xres != ww ||
				    var->yres != hh) {
					var->xres = var->xres_virtual = ww;
					var->yres = var->yres_virtual = hh;
				}
			}
		}
	}
}

static u8 cg3regvals_66hz[] __initdata = {	/* 1152 x 900, 66 Hz */
	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 u8 cg3regvals_76hz[] __initdata = {	/* 1152 x 900, 76 Hz */
	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 cg3regvals_rdi[] __initdata = {	/* 640 x 480, cgRDI */
	0x14, 0x70,	0x15, 0x20,	0x16, 0x08,	0x17, 0x10,
	0x18, 0x06,	0x19, 0x02,	0x1a, 0x31,	0x1b, 0x51,
	0x1c, 0x06,	0x1d, 0x0c,	0x1e, 0xff,	0x1f, 0x01,
	0x10, 0x22,	0
};

static u8 *cg3_regvals[] __initdata = {
	cg3regvals_66hz, cg3regvals_76hz, cg3regvals_rdi
};

static u_char cg3_dacvals[] __initdata = {
	4, 0xff,	5, 0x00,	6, 0x70,	7, 0x00,	0
};

static void cg3_do_default_mode(struct cg3_par *par)
{
	enum cg3_type type;
	u8 *p;

	if (par->flags & CG3_FLAG_RDI)
		type = CG3_RDI;
	else {
		u8 status = sbus_readb(&par->regs->status), mon;
		if ((status & CG3_SR_ID_MASK) == CG3_SR_ID_COLOR) {
			mon = status & CG3_SR_RES_MASK;
			if (mon == CG3_SR_1152_900_76_A ||
			    mon == CG3_SR_1152_900_76_B)
				type = CG3_AT_76HZ;
			else
				type = CG3_AT_66HZ;
		} else {
			prom_printf("cgthree: can't handle SR %02x\n",
				    status);
			prom_halt();
			return;
		}
	}

	for (p = cg3_regvals[type]; *p; p += 2) {
		u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
		sbus_writeb(p[1], regp);
	}
	for (p = cg3_dacvals; *p; p += 2) {
		volatile u8 __iomem *regp;

		regp = (volatile u8 __iomem *)&par->regs->cmap.addr;
		sbus_writeb(p[0], regp);
		regp = (volatile u8 __iomem *)&par->regs->cmap.control;
		sbus_writeb(p[1], regp);
	}
}

struct all_info {
	struct fb_info info;
	struct cg3_par par;
	struct list_head list;
};
static LIST_HEAD(cg3_list);

static void cg3_init_one(struct sbus_dev *sdev)
{
	struct all_info *all;
	int linebytes;

	all = kmalloc(sizeof(*all), GFP_KERNEL);
	if (!all) {
		printk(KERN_ERR "cg3: Cannot allocate memory.\n");
		return;
	}
	memset(all, 0, sizeof(*all));

	INIT_LIST_HEAD(&all->list);

	spin_lock_init(&all->par.lock);
	all->par.sdev = sdev;

	all->par.physbase = sdev->reg_addrs[0].phys_addr;

	sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
	all->info.var.red.length = 8;
	all->info.var.green.length = 8;
	all->info.var.blue.length = 8;
	if (!strcmp(sdev->prom_name, "cgRDI"))
		all->par.flags |= CG3_FLAG_RDI;
	if (all->par.flags & CG3_FLAG_RDI)
		cg3_rdi_maybe_fixup_var(&all->info.var, sdev);

	linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
				       all->info.var.xres);
	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);

	all->par.regs = sbus_ioremap(&sdev->resource[0], CG3_REGS_OFFSET,
			     sizeof(struct cg3_regs), "cg3 regs");

	all->info.flags = FBINFO_DEFAULT;
	all->info.fbops = &cg3_ops;
#ifdef CONFIG_SPARC32
	all->info.screen_base = (char __iomem *)
		prom_getintdefault(sdev->prom_node, "address", 0);
#endif
	if (!all->info.screen_base)
		all->info.screen_base =
			sbus_ioremap(&sdev->resource[0], CG3_RAM_OFFSET,
				     all->par.fbsize, "cg3 ram");
	all->info.par = &all->par;

	cg3_blank(0, &all->info);

	if (!prom_getbool(sdev->prom_node, "width"))
		cg3_do_default_mode(&all->par);

	if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
		printk(KERN_ERR "cg3: Could not allocate color map.\n");
		kfree(all);
		return;
	}
	fb_set_cmap(&all->info.cmap, &all->info);

	cg3_init_fix(&all->info, linebytes);

	if (register_framebuffer(&all->info) < 0) {
		printk(KERN_ERR "cg3: Could not register framebuffer.\n");
		fb_dealloc_cmap(&all->info.cmap);
		kfree(all);
		return;
	}

	list_add(&all->list, &cg3_list);

	printk("cg3: %s at %lx:%lx\n",
	       sdev->prom_name,
	       (long) sdev->reg_addrs[0].which_io,
	       (long) sdev->reg_addrs[0].phys_addr);
}

int __init cg3_init(void)
{
	struct sbus_bus *sbus;
	struct sbus_dev *sdev;

	if (fb_get_options("cg3fb", NULL))
		return -ENODEV;

	for_all_sbusdev(sdev, sbus) {
		if (!strcmp(sdev->prom_name, "cgthree") ||
		    !strcmp(sdev->prom_name, "cgRDI"))
			cg3_init_one(sdev);
	}

	return 0;
}

void __exit cg3_exit(void)
{
	struct list_head *pos, *tmp;

	list_for_each_safe(pos, tmp, &cg3_list) {
		struct all_info *all = list_entry(pos, typeof(*all), list);

		unregister_framebuffer(&all->info);
		fb_dealloc_cmap(&all->info.cmap);
		kfree(all);
	}
}

int __init
cg3_setup(char *arg)
{
	/* No cmdline options yet... */
	return 0;
}

module_init(cg3_init);

#ifdef MODULE
module_exit(cg3_exit);
#endif

MODULE_DESCRIPTION("framebuffer driver for CGthree chipsets");
MODULE_AUTHOR("David S. Miller <[email protected]>");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/* cg3.c: CGTHREE frame buffer driver
	2	*
	3	* Copyright (C) 2003 David S. Miller ([email protected])
	4	* Copyright (C) 1996,1998 Jakub Jelinek ([email protected])
	5	* Copyright (C) 1996 Miguel de Icaza ([email protected])
	6	* Copyright (C) 1997 Eddie C. Dost ([email protected])
	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>
	22	#include <asm/sbus.h>
	23	#include <asm/oplib.h>
	24	#include <asm/fbio.h>
	25
	26	#include "sbuslib.h"
	27
	28	/*
	29	* Local functions.
	30	*/
	31
	32	static int cg3_setcolreg(unsigned, unsigned, unsigned, unsigned,
	33	unsigned, struct fb_info *);
	34	static int cg3_blank(int, struct fb_info *);
	35
	36	static int cg3_mmap(struct fb_info , struct file , struct vm_area_struct *);
	37	static int cg3_ioctl(struct inode , struct file , unsigned int,
	38	unsigned long, struct fb_info *);
	39
	40	/*
	41	* Frame buffer operations
	42	*/
	43
	44	static struct fb_ops cg3_ops = {
	45	.owner = THIS_MODULE,
	46	.fb_setcolreg = cg3_setcolreg,
	47	.fb_blank = cg3_blank,
	48	.fb_fillrect = cfb_fillrect,
	49	.fb_copyarea = cfb_copyarea,
	50	.fb_imageblit = cfb_imageblit,
	51	.fb_mmap = cg3_mmap,
	52	.fb_ioctl = cg3_ioctl,
9ffb83bc CH	53	#ifdef CONFIG_COMPAT
	54	.fb_compat_ioctl = sbusfb_compat_ioctl,
	55	#endif
1da177e4 LT	56	};
	57
	58
	59	/* Control Register Constants */
	60	#define CG3_CR_ENABLE_INTS 0x80
	61	#define CG3_CR_ENABLE_VIDEO 0x40
	62	#define CG3_CR_ENABLE_TIMING 0x20
	63	#define CG3_CR_ENABLE_CURCMP 0x10
	64	#define CG3_CR_XTAL_MASK 0x0c
	65	#define CG3_CR_DIVISOR_MASK 0x03
	66
	67	/* Status Register Constants */
	68	#define CG3_SR_PENDING_INT 0x80
	69	#define CG3_SR_RES_MASK 0x70
	70	#define CG3_SR_1152_900_76_A 0x40
	71	#define CG3_SR_1152_900_76_B 0x60
	72	#define CG3_SR_ID_MASK 0x0f
	73	#define CG3_SR_ID_COLOR 0x01
	74	#define CG3_SR_ID_MONO 0x02
	75	#define CG3_SR_ID_MONO_ECL 0x03
	76
	77	enum cg3_type {
	78	CG3_AT_66HZ = 0,
	79	CG3_AT_76HZ,
	80	CG3_RDI
	81	};
	82
	83	struct bt_regs {
	84	volatile u32 addr;
	85	volatile u32 color_map;
	86	volatile u32 control;
	87	volatile u32 cursor;
	88	};
	89
	90	struct cg3_regs {
	91	struct bt_regs cmap;
	92	volatile u8 control;
	93	volatile u8 status;
	94	volatile u8 cursor_start;
	95	volatile u8 cursor_end;
	96	volatile u8 h_blank_start;
	97	volatile u8 h_blank_end;
	98	volatile u8 h_sync_start;
	99	volatile u8 h_sync_end;
	100	volatile u8 comp_sync_end;
	101	volatile u8 v_blank_start_high;
	102	volatile u8 v_blank_start_low;
	103	volatile u8 v_blank_end;
	104	volatile u8 v_sync_start;
	105	volatile u8 v_sync_end;
	106	volatile u8 xfer_holdoff_start;
	107	volatile u8 xfer_holdoff_end;
	108	};
	109
	110	/* Offset of interesting structures in the OBIO space */
	111	#define CG3_REGS_OFFSET 0x400000UL
	112	#define CG3_RAM_OFFSET 0x800000UL
	113
	114	struct cg3_par {
	115	spinlock_t lock;
	116	struct cg3_regs __iomem *regs;
	117	u32 sw_cmap[((256 * 3) + 3) / 4];
	118
	119	u32 flags;
120	#define CG3_FLAG_BLANKED 0x00000001
121	#define CG3_FLAG_RDI 0x00000002
122
123	unsigned long physbase;
124	unsigned long fbsize;
125
126	struct sbus_dev *sdev;
1da177e4 LT	127	};
	128
	129	/**
	130	* cg3_setcolreg - Optional function. Sets a color register.
	131	* @regno: boolean, 0 copy local, 1 get_user() function
	132	* @red: frame buffer colormap structure
	133	* @green: The green value which can be up to 16 bits wide
	134	* @blue: The blue value which can be up to 16 bits wide.
	135	* @transp: If supported the alpha value which can be up to 16 bits wide.
	136	* @info: frame buffer info structure
	137	*
	138	* The cg3 palette is loaded with 4 color values at each time
	139	* so you end up with: (rgb)(r), (gb)(rg), (b)(rgb), and so on.
	140	* We keep a sw copy of the hw cmap to assist us in this esoteric
	141	* loading procedure.
	142	*/
	143	static int cg3_setcolreg(unsigned regno,
	144	unsigned red, unsigned green, unsigned blue,
	145	unsigned transp, struct fb_info *info)
	146	{
	147	struct cg3_par par = (struct cg3_par ) info->par;
	148	struct bt_regs __iomem *bt = &par->regs->cmap;
	149	unsigned long flags;
	150	u32 *p32;
	151	u8 *p8;
	152	int count;
	153
	154	if (regno >= 256)
	155	return 1;
	156
	157	red >>= 8;
	158	green >>= 8;
	159	blue >>= 8;
	160
	161	spin_lock_irqsave(&par->lock, flags);
	162
	163	p8 = (u8 )par->sw_cmap + (regno 3);
	164	p8[0] = red;
	165	p8[1] = green;
	166	p8[2] = blue;
	167
	168	#define D4M3(x) ((((x)>>2)<<1) + ((x)>>2)) /* (x/4)3 /
	169	#define D4M4(x) ((x)&~0x3) /* (x/4)4 /
	170
	171	count = 3;
	172	p32 = &par->sw_cmap[D4M3(regno)];
	173	sbus_writel(D4M4(regno), &bt->addr);
	174	while (count--)
	175	sbus_writel(*p32++, &bt->color_map);
	176
	177	#undef D4M3
	178	#undef D4M4
	179
	180	spin_unlock_irqrestore(&par->lock, flags);
	181
	182	return 0;
	183	}
	184
	185	/**
	186	* cg3_blank - Optional function. Blanks the display.
	187	* @blank_mode: the blank mode we want.
	188	* @info: frame buffer structure that represents a single frame buffer
	189	*/
	190	static int
191	cg3_blank(int blank, struct fb_info *info)
192	{
193	struct cg3_par par = (struct cg3_par ) info->par;
194	struct cg3_regs __iomem *regs = par->regs;
195	unsigned long flags;
196	u8 val;
197
198	spin_lock_irqsave(&par->lock, flags);
199
200	switch (blank) {
201	case FB_BLANK_UNBLANK: /* Unblanking */
202	val = sbus_readb(&regs->control);
203	val \|= CG3_CR_ENABLE_VIDEO;
204	sbus_writeb(val, &regs->control);
205	par->flags &= ~CG3_FLAG_BLANKED;
206	break;
207
208	case FB_BLANK_NORMAL: /* Normal blanking */
209	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
210	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
211	case FB_BLANK_POWERDOWN: /* Poweroff */
212	val = sbus_readb(&regs->control);
213	val &= ~CG3_CR_ENABLE_VIDEO;
214	sbus_writeb(val, &regs->control);
215	par->flags \|= CG3_FLAG_BLANKED;
216	break;
217	}
218
219	spin_unlock_irqrestore(&par->lock, flags);
220
221	return 0;
222	}
223
224	static struct sbus_mmap_map cg3_mmap_map[] = {
225	{
226	.voff = CG3_MMAP_OFFSET,
227	.poff = CG3_RAM_OFFSET,
228	.size = SBUS_MMAP_FBSIZE(1)
229	},
230	{ .size = 0 }
231	};
232
233	static int cg3_mmap(struct fb_info info, struct file file, struct vm_area_struct *vma)
234	{
235	struct cg3_par par = (struct cg3_par )info->par;
236
237	return sbusfb_mmap_helper(cg3_mmap_map,
238	par->physbase, par->fbsize,
239	par->sdev->reg_addrs[0].which_io,
240	vma);
241	}
242
243	static int cg3_ioctl(struct inode inode, struct file file, unsigned int cmd,
244	unsigned long arg, struct fb_info *info)
245	{
246	struct cg3_par par = (struct cg3_par ) info->par;
247
248	return sbusfb_ioctl_helper(cmd, arg, info,
249	FBTYPE_SUN3COLOR, 8, par->fbsize);
250	}
251
252	/*
253	* Initialisation
254	*/
255
256	static void
257	cg3_init_fix(struct fb_info *info, int linebytes)
258	{
259	struct cg3_par par = (struct cg3_par )info->par;
260
261	strlcpy(info->fix.id, par->sdev->prom_name, sizeof(info->fix.id));
262
263	info->fix.type = FB_TYPE_PACKED_PIXELS;
264	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
265
266	info->fix.line_length = linebytes;
267
268	info->fix.accel = FB_ACCEL_SUN_CGTHREE;
269	}
270
271	static void cg3_rdi_maybe_fixup_var(struct fb_var_screeninfo *var,
272	struct sbus_dev *sdev)
273	{
274	char buffer[40];
275	char *p;
276	int ww, hh;
277
278	*buffer = 0;
279	prom_getstring(sdev->prom_node, "params", buffer, sizeof(buffer));
280	if (*buffer) {
281	ww = simple_strtoul(buffer, &p, 10);
282	if (ww && *p == 'x') {
283	hh = simple_strtoul(p + 1, &p, 10);
284	if (hh && *p == '-') {
285	if (var->xres != ww \|\|
286	var->yres != hh) {
287	var->xres = var->xres_virtual = ww;
288	var->yres = var->yres_virtual = hh;
289	}
290	}
291	}
292	}
293	}
294
295	static u8 cg3regvals_66hz[] __initdata = { /* 1152 x 900, 66 Hz */
296	0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
297	0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
298	0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
299	0x10, 0x20, 0
300	};
301
302	static u8 cg3regvals_76hz[] __initdata = { /* 1152 x 900, 76 Hz */
303	0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
304	0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
305	0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
306	0x10, 0x24, 0
307	};
308
309	static u8 cg3regvals_rdi[] __initdata = { /* 640 x 480, cgRDI */
310	0x14, 0x70, 0x15, 0x20, 0x16, 0x08, 0x17, 0x10,
311	0x18, 0x06, 0x19, 0x02, 0x1a, 0x31, 0x1b, 0x51,
312	0x1c, 0x06, 0x1d, 0x0c, 0x1e, 0xff, 0x1f, 0x01,
313	0x10, 0x22, 0
314	};
315
316	static u8 *cg3_regvals[] __initdata = {
317	cg3regvals_66hz, cg3regvals_76hz, cg3regvals_rdi
318	};
319
320	static u_char cg3_dacvals[] __initdata = {
321	4, 0xff, 5, 0x00, 6, 0x70, 7, 0x00, 0
322	};
323
324	static void cg3_do_default_mode(struct cg3_par *par)
325	{
326	enum cg3_type type;
327	u8 *p;
328
329	if (par->flags & CG3_FLAG_RDI)
330	type = CG3_RDI;
331	else {
332	u8 status = sbus_readb(&par->regs->status), mon;
333	if ((status & CG3_SR_ID_MASK) == CG3_SR_ID_COLOR) {
334	mon = status & CG3_SR_RES_MASK;
335	if (mon == CG3_SR_1152_900_76_A \|\|
336	mon == CG3_SR_1152_900_76_B)
337	type = CG3_AT_76HZ;
338	else
339	type = CG3_AT_66HZ;
340	} else {
341	prom_printf("cgthree: can't handle SR %02x\n",
342	status);
343	prom_halt();
344	return;
345	}
346	}
347
348	for (p = cg3_regvals[type]; *p; p += 2) {
349	u8 __iomem regp = &((u8 __iomem )par->regs)[p[0]];
350	sbus_writeb(p[1], regp);
351	}
352	for (p = cg3_dacvals; *p; p += 2) {
353	volatile u8 __iomem *regp;
354
355	regp = (volatile u8 __iomem *)&par->regs->cmap.addr;
356	sbus_writeb(p[0], regp);
357	regp = (volatile u8 __iomem *)&par->regs->cmap.control;
358	sbus_writeb(p[1], regp);
359	}
360	}
361
362	struct all_info {
363	struct fb_info info;
364	struct cg3_par par;
365	struct list_head list;
366	};
367	static LIST_HEAD(cg3_list);
368
369	static void cg3_init_one(struct sbus_dev *sdev)
370	{
371	struct all_info *all;
372	int linebytes;
373
374	all = kmalloc(sizeof(*all), GFP_KERNEL);
375	if (!all) {
376	printk(KERN_ERR "cg3: Cannot allocate memory.\n");
377	return;
378	}
379	memset(all, 0, sizeof(*all));
380
381	INIT_LIST_HEAD(&all->list);
382
383	spin_lock_init(&all->par.lock);
384	all->par.sdev = sdev;
385
386	all->par.physbase = sdev->reg_addrs[0].phys_addr;
387
388	sbusfb_fill_var(&all->info.var, sdev->prom_node, 8);
389	all->info.var.red.length = 8;
390	all->info.var.green.length = 8;
391	all->info.var.blue.length = 8;
392	if (!strcmp(sdev->prom_name, "cgRDI"))
393	all->par.flags \|= CG3_FLAG_RDI;
394	if (all->par.flags & CG3_FLAG_RDI)
395	cg3_rdi_maybe_fixup_var(&all->info.var, sdev);
396
397	linebytes = prom_getintdefault(sdev->prom_node, "linebytes",
398	all->info.var.xres);
399	all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
400
401	all->par.regs = sbus_ioremap(&sdev->resource[0], CG3_REGS_OFFSET,
402	sizeof(struct cg3_regs), "cg3 regs");
403
404	all->info.flags = FBINFO_DEFAULT;
405	all->info.fbops = &cg3_ops;
406	#ifdef CONFIG_SPARC32
407	all->info.screen_base = (char __iomem *)
408	prom_getintdefault(sdev->prom_node, "address", 0);
409	#endif
410	if (!all->info.screen_base)
411	all->info.screen_base =
412	sbus_ioremap(&sdev->resource[0], CG3_RAM_OFFSET,
413	all->par.fbsize, "cg3 ram");
414	all->info.par = &all->par;
415
416	cg3_blank(0, &all->info);
417
418	if (!prom_getbool(sdev->prom_node, "width"))
419	cg3_do_default_mode(&all->par);
420
421	if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
422	printk(KERN_ERR "cg3: Could not allocate color map.\n");
423	kfree(all);
424	return;
425	}
426	fb_set_cmap(&all->info.cmap, &all->info);
427
428	cg3_init_fix(&all->info, linebytes);
429
430	if (register_framebuffer(&all->info) < 0) {
431	printk(KERN_ERR "cg3: Could not register framebuffer.\n");
432	fb_dealloc_cmap(&all->info.cmap);
433	kfree(all);
434	return;
435	}
436
437	list_add(&all->list, &cg3_list);
438
439	printk("cg3: %s at %lx:%lx\n",
440	sdev->prom_name,
441	(long) sdev->reg_addrs[0].which_io,
442	(long) sdev->reg_addrs[0].phys_addr);
443	}
444
445	int __init cg3_init(void)
446	{
447	struct sbus_bus *sbus;
448	struct sbus_dev *sdev;
449
450	if (fb_get_options("cg3fb", NULL))
451	return -ENODEV;
452
453	for_all_sbusdev(sdev, sbus) {
454	if (!strcmp(sdev->prom_name, "cgthree") \|\|
455	!strcmp(sdev->prom_name, "cgRDI"))
456	cg3_init_one(sdev);
457	}
458
459	return 0;
460	}
461
462	void __exit cg3_exit(void)
463	{
464	struct list_head pos, tmp;
465
466	list_for_each_safe(pos, tmp, &cg3_list) {
467	struct all_info all = list_entry(pos, typeof(all), list);
468
469	unregister_framebuffer(&all->info);
470	fb_dealloc_cmap(&all->info.cmap);
471	kfree(all);
472	}
473	}
474
475	int __init
476	cg3_setup(char *arg)
477	{
478	/* No cmdline options yet... */
479	return 0;
480	}
481
482	module_init(cg3_init);
483
484	#ifdef MODULE
485	module_exit(cg3_exit);
486	#endif
487
488	MODULE_DESCRIPTION("framebuffer driver for CGthree chipsets");
489	MODULE_AUTHOR("David S. Miller <[email protected]>");
490	MODULE_LICENSE("GPL");