drivers/video/cg14.c - fp2-dev/kernel/msm - Gitiles

 /* cg14.c: CGFOURTEEN 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) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
  *
  * 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 <linux/uaccess.h>
 #include <linux/of_device.h>

 #include <asm/io.h>
 #include <asm/fbio.h>

 #include "sbuslib.h"

 /*
  * Local functions.
  */

 static int cg14_setcolreg(unsigned, unsigned, unsigned, unsigned,
 			 unsigned, struct fb_info *);

 static int cg14_mmap(struct fb_info *, struct vm_area_struct *);
 static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long);
 static int cg14_pan_display(struct fb_var_screeninfo *, struct fb_info *);

 /*
  *  Frame buffer operations
  */

 static struct fb_ops cg14_ops = {
 	.owner			= THIS_MODULE,
 	.fb_setcolreg		= cg14_setcolreg,
 	.fb_pan_display		= cg14_pan_display,
 	.fb_fillrect		= cfb_fillrect,
 	.fb_copyarea		= cfb_copyarea,
 	.fb_imageblit		= cfb_imageblit,
 	.fb_mmap		= cg14_mmap,
 	.fb_ioctl		= cg14_ioctl,
 #ifdef CONFIG_COMPAT
 	.fb_compat_ioctl	= sbusfb_compat_ioctl,
 #endif
 };

 #define CG14_MCR_INTENABLE_SHIFT	7
 #define CG14_MCR_INTENABLE_MASK		0x80
 #define CG14_MCR_VIDENABLE_SHIFT	6
 #define CG14_MCR_VIDENABLE_MASK		0x40
 #define CG14_MCR_PIXMODE_SHIFT		4
 #define CG14_MCR_PIXMODE_MASK		0x30
 #define CG14_MCR_TMR_SHIFT		2
 #define CG14_MCR_TMR_MASK		0x0c
 #define CG14_MCR_TMENABLE_SHIFT		1
 #define CG14_MCR_TMENABLE_MASK		0x02
 #define CG14_MCR_RESET_SHIFT		0
 #define CG14_MCR_RESET_MASK		0x01
 #define CG14_REV_REVISION_SHIFT		4
 #define CG14_REV_REVISION_MASK		0xf0
 #define CG14_REV_IMPL_SHIFT		0
 #define CG14_REV_IMPL_MASK		0x0f
 #define CG14_VBR_FRAMEBASE_SHIFT	12
 #define CG14_VBR_FRAMEBASE_MASK		0x00fff000
 #define CG14_VMCR1_SETUP_SHIFT		0
 #define CG14_VMCR1_SETUP_MASK		0x000001ff
 #define CG14_VMCR1_VCONFIG_SHIFT	9
 #define CG14_VMCR1_VCONFIG_MASK		0x00000e00
 #define CG14_VMCR2_REFRESH_SHIFT	0
 #define CG14_VMCR2_REFRESH_MASK		0x00000001
 #define CG14_VMCR2_TESTROWCNT_SHIFT	1
 #define CG14_VMCR2_TESTROWCNT_MASK	0x00000002
 #define CG14_VMCR2_FBCONFIG_SHIFT	2
 #define CG14_VMCR2_FBCONFIG_MASK	0x0000000c
 #define CG14_VCR_REFRESHREQ_SHIFT	0
 #define CG14_VCR_REFRESHREQ_MASK	0x000003ff
 #define CG14_VCR1_REFRESHENA_SHIFT	10
 #define CG14_VCR1_REFRESHENA_MASK	0x00000400
 #define CG14_VCA_CAD_SHIFT		0
 #define CG14_VCA_CAD_MASK		0x000003ff
 #define CG14_VCA_VERS_SHIFT		10
 #define CG14_VCA_VERS_MASK		0x00000c00
 #define CG14_VCA_RAMSPEED_SHIFT		12
 #define CG14_VCA_RAMSPEED_MASK		0x00001000
 #define CG14_VCA_8MB_SHIFT		13
 #define CG14_VCA_8MB_MASK		0x00002000

 #define CG14_MCR_PIXMODE_8		0
 #define CG14_MCR_PIXMODE_16		2
 #define CG14_MCR_PIXMODE_32		3

 struct cg14_regs{
 	u8 mcr;	/* Master Control Reg */
 	u8 ppr;	/* Packed Pixel Reg */
 	u8 tms[2];	/* Test Mode Status Regs */
 	u8 msr;	/* Master Status Reg */
 	u8 fsr;	/* Fault Status Reg */
 	u8 rev;	/* Revision & Impl */
 	u8 ccr;	/* Clock Control Reg */
 	u32 tmr;	/* Test Mode Read Back */
 	u8 mod;	/* Monitor Operation Data Reg */
 	u8 acr;	/* Aux Control */
 	u8 xxx0[6];
 	u16 hct;	/* Hor Counter */
 	u16 vct;	/* Vert Counter */
 	u16 hbs;	/* Hor Blank Start */
 	u16 hbc;	/* Hor Blank Clear */
 	u16 hss;	/* Hor Sync Start */
 	u16 hsc;	/* Hor Sync Clear */
 	u16 csc;	/* Composite Sync Clear */
 	u16 vbs;	/* Vert Blank Start */
 	u16 vbc;	/* Vert Blank Clear */
 	u16 vss;	/* Vert Sync Start */
 	u16 vsc;	/* Vert Sync Clear */
 	u16 xcs;
 	u16 xcc;
 	u16 fsa;	/* Fault Status Address */
 	u16 adr;	/* Address Registers */
 	u8 xxx1[0xce];
 	u8 pcg[0x100]; /* Pixel Clock Generator */
 	u32 vbr;	/* Frame Base Row */
 	u32 vmcr;	/* VBC Master Control */
 	u32 vcr;	/* VBC refresh */
 	u32 vca;	/* VBC Config */
 };

 #define CG14_CCR_ENABLE	0x04
 #define CG14_CCR_SELECT 0x02	/* HW/Full screen */

 struct cg14_cursor {
 	u32 cpl0[32];	/* Enable plane 0 */
 	u32 cpl1[32];  /* Color selection plane */
 	u8 ccr;	/* Cursor Control Reg */
 	u8 xxx0[3];
 	u16 cursx;	/* Cursor x,y position */
 	u16 cursy;	/* Cursor x,y position */
 	u32 color0;
 	u32 color1;
 	u32 xxx1[0x1bc];
 	u32 cpl0i[32];	/* Enable plane 0 autoinc */
 	u32 cpl1i[32]; /* Color selection autoinc */
 };

 struct cg14_dac {
 	u8 addr;	/* Address Register */
 	u8 xxx0[255];
 	u8 glut;	/* Gamma table */
 	u8 xxx1[255];
 	u8 select;	/* Register Select */
 	u8 xxx2[255];
 	u8 mode;	/* Mode Register */
 };

 struct cg14_xlut{
 	u8 x_xlut [256];
 	u8 x_xlutd [256];
 	u8 xxx0[0x600];
 	u8 x_xlut_inc [256];
 	u8 x_xlutd_inc [256];
 };

 /* Color look up table (clut) */
 /* Each one of these arrays hold the color lookup table (for 256
  * colors) for each MDI page (I assume then there should be 4 MDI
  * pages, I still wonder what they are.  I have seen NeXTStep split
  * the screen in four parts, while operating in 24 bits mode.  Each
  * integer holds 4 values: alpha value (transparency channel, thanks
  * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
  *
  * I currently use the clut instead of the Xlut
  */
 struct cg14_clut {
 	u32 c_clut [256];
 	u32 c_clutd [256];    /* i wonder what the 'd' is for */
 	u32 c_clut_inc [256];
 	u32 c_clutd_inc [256];
 };

 #define CG14_MMAP_ENTRIES	16

 struct cg14_par {
 	spinlock_t		lock;
 	struct cg14_regs	__iomem *regs;
 	struct cg14_clut	__iomem *clut;
 	struct cg14_cursor	__iomem *cursor;

 	u32			flags;
 #define CG14_FLAG_BLANKED	0x00000001

 	unsigned long		physbase;
 	unsigned long		iospace;
 	unsigned long		fbsize;

 	struct sbus_mmap_map	mmap_map[CG14_MMAP_ENTRIES];

 	int			mode;
 	int			ramsize;
 };

 static void __cg14_reset(struct cg14_par *par)
 {
 	struct cg14_regs __iomem *regs = par->regs;
 	u8 val;

 	val = sbus_readb(&regs->mcr);
 	val &= ~(CG14_MCR_PIXMODE_MASK);
 	sbus_writeb(val, &regs->mcr);
 }

 static int cg14_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 {
 	struct cg14_par *par = (struct cg14_par *) info->par;
 	unsigned long flags;

 	/* We just use this to catch switches out of
 	 * graphics mode.
 	 */
 	spin_lock_irqsave(&par->lock, flags);
 	__cg14_reset(par);
 	spin_unlock_irqrestore(&par->lock, flags);

 	if (var->xoffset || var->yoffset || var->vmode)
 		return -EINVAL;
 	return 0;
 }

 /**
  *      cg14_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
  */
 static int cg14_setcolreg(unsigned regno,
 			  unsigned red, unsigned green, unsigned blue,
 			  unsigned transp, struct fb_info *info)
 {
 	struct cg14_par *par = (struct cg14_par *) info->par;
 	struct cg14_clut __iomem *clut = par->clut;
 	unsigned long flags;
 	u32 val;

 	if (regno >= 256)
 		return 1;

 	red >>= 8;
 	green >>= 8;
 	blue >>= 8;
 	val = (red | (green << 8) | (blue << 16));

 	spin_lock_irqsave(&par->lock, flags);
 	sbus_writel(val, &clut->c_clut[regno]);
 	spin_unlock_irqrestore(&par->lock, flags);

 	return 0;
 }

 static int cg14_mmap(struct fb_info *info, struct vm_area_struct *vma)
 {
 	struct cg14_par *par = (struct cg14_par *) info->par;

 	return sbusfb_mmap_helper(par->mmap_map,
 				  par->physbase, par->fbsize,
 				  par->iospace, vma);
 }

 static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
 {
 	struct cg14_par *par = (struct cg14_par *) info->par;
 	struct cg14_regs __iomem *regs = par->regs;
 	struct mdi_cfginfo kmdi, __user *mdii;
 	unsigned long flags;
 	int cur_mode, mode, ret = 0;

 	switch (cmd) {
 	case MDI_RESET:
 		spin_lock_irqsave(&par->lock, flags);
 		__cg14_reset(par);
 		spin_unlock_irqrestore(&par->lock, flags);
 		break;

 	case MDI_GET_CFGINFO:
 		memset(&kmdi, 0, sizeof(kmdi));

 		spin_lock_irqsave(&par->lock, flags);
 		kmdi.mdi_type = FBTYPE_MDICOLOR;
 		kmdi.mdi_height = info->var.yres;
 		kmdi.mdi_width = info->var.xres;
 		kmdi.mdi_mode = par->mode;
 		kmdi.mdi_pixfreq = 72; /* FIXME */
 		kmdi.mdi_size = par->ramsize;
 		spin_unlock_irqrestore(&par->lock, flags);

 		mdii = (struct mdi_cfginfo __user *) arg;
 		if (copy_to_user(mdii, &kmdi, sizeof(kmdi)))
 			ret = -EFAULT;
 		break;

 	case MDI_SET_PIXELMODE:
 		if (get_user(mode, (int __user *) arg)) {
 			ret = -EFAULT;
 			break;
 		}

 		spin_lock_irqsave(&par->lock, flags);
 		cur_mode = sbus_readb(&regs->mcr);
 		cur_mode &= ~CG14_MCR_PIXMODE_MASK;
 		switch(mode) {
 		case MDI_32_PIX:
 			cur_mode |= (CG14_MCR_PIXMODE_32 <<
 				     CG14_MCR_PIXMODE_SHIFT);
 			break;

 		case MDI_16_PIX:
 			cur_mode |= (CG14_MCR_PIXMODE_16 <<
 				     CG14_MCR_PIXMODE_SHIFT);
 			break;

 		case MDI_8_PIX:
 			break;

 		default:
 			ret = -ENOSYS;
 			break;
 		};
 		if (!ret) {
 			sbus_writeb(cur_mode, &regs->mcr);
 			par->mode = mode;
 		}
 		spin_unlock_irqrestore(&par->lock, flags);
 		break;

 	default:
 		ret = sbusfb_ioctl_helper(cmd, arg, info,
 					  FBTYPE_MDICOLOR, 8, par->fbsize);
 		break;
 	};

 	return ret;
 }

 /*
  *  Initialisation
  */

 static void __devinit cg14_init_fix(struct fb_info *info, int linebytes,
 				    struct device_node *dp)
 {
 	const char *name = dp->name;

 	strlcpy(info->fix.id, 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_CG14;
 }

 static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] __devinitdata = {
 	{
 		.voff	= CG14_REGS,
 		.poff	= 0x80000000,
 		.size	= 0x1000
 	},
 	{
 		.voff	= CG14_XLUT,
 		.poff	= 0x80003000,
 		.size	= 0x1000
 	},
 	{
 		.voff	= CG14_CLUT1,
 		.poff	= 0x80004000,
 		.size	= 0x1000
 	},
 	{
 		.voff	= CG14_CLUT2,
 		.poff	= 0x80005000,
 		.size	= 0x1000
 	},
 	{
 		.voff	= CG14_CLUT3,
 		.poff	= 0x80006000,
 		.size	= 0x1000
 	},
 	{
 		.voff	= CG3_MMAP_OFFSET - 0x7000,
 		.poff	= 0x80000000,
 		.size	= 0x7000
 	},
 	{
 		.voff	= CG3_MMAP_OFFSET,
 		.poff	= 0x00000000,
 		.size	= SBUS_MMAP_FBSIZE(1)
 	},
 	{
 		.voff	= MDI_CURSOR_MAP,
 		.poff	= 0x80001000,
 		.size	= 0x1000
 	},
 	{
 		.voff	= MDI_CHUNKY_BGR_MAP,
 		.poff	= 0x01000000,
 		.size	= 0x400000
 	},
 	{
 		.voff	= MDI_PLANAR_X16_MAP,
 		.poff	= 0x02000000,
 		.size	= 0x200000
 	},
 	{
 		.voff	= MDI_PLANAR_C16_MAP,
 		.poff	= 0x02800000,
 		.size	= 0x200000
 	},
 	{
 		.voff	= MDI_PLANAR_X32_MAP,
 		.poff	= 0x03000000,
 		.size	= 0x100000
 	},
 	{
 		.voff	= MDI_PLANAR_B32_MAP,
 		.poff	= 0x03400000,
 		.size	= 0x100000
 	},
 	{
 		.voff	= MDI_PLANAR_G32_MAP,
 		.poff	= 0x03800000,
 		.size	= 0x100000
 	},
 	{
 		.voff	= MDI_PLANAR_R32_MAP,
 		.poff	= 0x03c00000,
 		.size	= 0x100000
 	},
 	{ .size = 0 }
 };

 static void cg14_unmap_regs(struct of_device *op, struct fb_info *info,
 			    struct cg14_par *par)
 {
 	if (par->regs)
 		of_iounmap(&op->resource[0],
 			   par->regs, sizeof(struct cg14_regs));
 	if (par->clut)
 		of_iounmap(&op->resource[0],
 			   par->clut, sizeof(struct cg14_clut));
 	if (par->cursor)
 		of_iounmap(&op->resource[0],
 			   par->cursor, sizeof(struct cg14_cursor));
 	if (info->screen_base)
 		of_iounmap(&op->resource[1],
 			   info->screen_base, par->fbsize);
 }

 static int __devinit cg14_probe(struct of_device *op, const struct of_device_id *match)
 {
 	struct device_node *dp = op->node;
 	struct fb_info *info;
 	struct cg14_par *par;
 	int is_8mb, linebytes, i, err;

 	info = framebuffer_alloc(sizeof(struct cg14_par), &op->dev);

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

 	spin_lock_init(&par->lock);

 	sbusfb_fill_var(&info->var, dp, 8);
 	info->var.red.length = 8;
 	info->var.green.length = 8;
 	info->var.blue.length = 8;

 	linebytes = of_getintprop_default(dp, "linebytes",
 					  info->var.xres);
 	par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);

 	if (!strcmp(dp->parent->name, "sbus") ||
 	    !strcmp(dp->parent->name, "sbi")) {
 		par->physbase = op->resource[0].start;
 		par->iospace = op->resource[0].flags & IORESOURCE_BITS;
 	} else {
 		par->physbase = op->resource[1].start;
 		par->iospace = op->resource[0].flags & IORESOURCE_BITS;
 	}

 	par->regs = of_ioremap(&op->resource[0], 0,
 			       sizeof(struct cg14_regs), "cg14 regs");
 	par->clut = of_ioremap(&op->resource[0], CG14_CLUT1,
 			       sizeof(struct cg14_clut), "cg14 clut");
 	par->cursor = of_ioremap(&op->resource[0], CG14_CURSORREGS,
 				 sizeof(struct cg14_cursor), "cg14 cursor");

 	info->screen_base = of_ioremap(&op->resource[1], 0,
 				       par->fbsize, "cg14 ram");

 	if (!par->regs || !par->clut || !par->cursor || !info->screen_base)
 		goto out_unmap_regs;

 	is_8mb = (((op->resource[1].end - op->resource[1].start) + 1) ==
 		  (8 * 1024 * 1024));

 	BUILD_BUG_ON(sizeof(par->mmap_map) != sizeof(__cg14_mmap_map));

 	memcpy(&par->mmap_map, &__cg14_mmap_map, sizeof(par->mmap_map));

 	for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
 		struct sbus_mmap_map *map = &par->mmap_map[i];

 		if (!map->size)
 			break;
 		if (map->poff & 0x80000000)
 			map->poff = (map->poff & 0x7fffffff) +
 				(op->resource[0].start -
 				 op->resource[1].start);
 		if (is_8mb &&
 		    map->size >= 0x100000 &&
 		    map->size <= 0x400000)
 			map->size *= 2;
 	}

 	par->mode = MDI_8_PIX;
 	par->ramsize = (is_8mb ? 0x800000 : 0x400000);

 	info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
 	info->fbops = &cg14_ops;

 	__cg14_reset(par);

 	if (fb_alloc_cmap(&info->cmap, 256, 0))
 		goto out_unmap_regs;

 	fb_set_cmap(&info->cmap, info);

 	cg14_init_fix(info, linebytes, dp);

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

 	dev_set_drvdata(&op->dev, info);

 	printk(KERN_INFO "%s: cgfourteen at %lx:%lx, %dMB\n",
 	       dp->full_name,
 	       par->iospace, par->physbase,
 	       par->ramsize >> 20);

 	return 0;

 out_dealloc_cmap:
 	fb_dealloc_cmap(&info->cmap);

 out_unmap_regs:
 	cg14_unmap_regs(op, info, par);

 out_err:
 	return err;
 }

 static int __devexit cg14_remove(struct of_device *op)
 {
 	struct fb_info *info = dev_get_drvdata(&op->dev);
 	struct cg14_par *par = info->par;

 	unregister_framebuffer(info);
 	fb_dealloc_cmap(&info->cmap);

 	cg14_unmap_regs(op, info, par);

 	framebuffer_release(info);

 	dev_set_drvdata(&op->dev, NULL);

 	return 0;
 }

 static struct of_device_id cg14_match[] = {
 	{
 		.name = "cgfourteen",
 	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, cg14_match);

 static struct of_platform_driver cg14_driver = {
 	.name		= "cg14",
 	.match_table	= cg14_match,
 	.probe		= cg14_probe,
 	.remove		= __devexit_p(cg14_remove),
 };

 static int __init cg14_init(void)
 {
 	if (fb_get_options("cg14fb", NULL))
 		return -ENODEV;

 	return of_register_driver(&cg14_driver, &of_bus_type);
 }

 static void __exit cg14_exit(void)
 {
 	of_unregister_driver(&cg14_driver);
 }

 module_init(cg14_init);
 module_exit(cg14_exit);

 MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 MODULE_VERSION("2.0");
 MODULE_LICENSE("GPL");
	/* cg14.c: CGFOURTEEN 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) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
	*
	* 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 <linux/uaccess.h>
	#include <linux/of_device.h>

	#include <asm/io.h>
	#include <asm/fbio.h>

	#include "sbuslib.h"

	/*
	* Local functions.
	*/

	static int cg14_setcolreg(unsigned, unsigned, unsigned, unsigned,
	unsigned, struct fb_info *);

	static int cg14_mmap(struct fb_info , struct vm_area_struct );
	static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long);
	static int cg14_pan_display(struct fb_var_screeninfo , struct fb_info );

	/*
	* Frame buffer operations
	*/

	static struct fb_ops cg14_ops = {
	.owner = THIS_MODULE,
	.fb_setcolreg = cg14_setcolreg,
	.fb_pan_display = cg14_pan_display,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_mmap = cg14_mmap,
	.fb_ioctl = cg14_ioctl,
	#ifdef CONFIG_COMPAT
	.fb_compat_ioctl = sbusfb_compat_ioctl,
	#endif
	};

	#define CG14_MCR_INTENABLE_SHIFT 7
	#define CG14_MCR_INTENABLE_MASK 0x80
	#define CG14_MCR_VIDENABLE_SHIFT 6
	#define CG14_MCR_VIDENABLE_MASK 0x40
	#define CG14_MCR_PIXMODE_SHIFT 4
	#define CG14_MCR_PIXMODE_MASK 0x30
	#define CG14_MCR_TMR_SHIFT 2
	#define CG14_MCR_TMR_MASK 0x0c
	#define CG14_MCR_TMENABLE_SHIFT 1
	#define CG14_MCR_TMENABLE_MASK 0x02
	#define CG14_MCR_RESET_SHIFT 0
	#define CG14_MCR_RESET_MASK 0x01
	#define CG14_REV_REVISION_SHIFT 4
	#define CG14_REV_REVISION_MASK 0xf0
	#define CG14_REV_IMPL_SHIFT 0
	#define CG14_REV_IMPL_MASK 0x0f
	#define CG14_VBR_FRAMEBASE_SHIFT 12
	#define CG14_VBR_FRAMEBASE_MASK 0x00fff000
	#define CG14_VMCR1_SETUP_SHIFT 0
	#define CG14_VMCR1_SETUP_MASK 0x000001ff
	#define CG14_VMCR1_VCONFIG_SHIFT 9
	#define CG14_VMCR1_VCONFIG_MASK 0x00000e00
	#define CG14_VMCR2_REFRESH_SHIFT 0
	#define CG14_VMCR2_REFRESH_MASK 0x00000001
	#define CG14_VMCR2_TESTROWCNT_SHIFT 1
	#define CG14_VMCR2_TESTROWCNT_MASK 0x00000002
	#define CG14_VMCR2_FBCONFIG_SHIFT 2
	#define CG14_VMCR2_FBCONFIG_MASK 0x0000000c
	#define CG14_VCR_REFRESHREQ_SHIFT 0
	#define CG14_VCR_REFRESHREQ_MASK 0x000003ff
	#define CG14_VCR1_REFRESHENA_SHIFT 10
	#define CG14_VCR1_REFRESHENA_MASK 0x00000400
	#define CG14_VCA_CAD_SHIFT 0
	#define CG14_VCA_CAD_MASK 0x000003ff
	#define CG14_VCA_VERS_SHIFT 10
	#define CG14_VCA_VERS_MASK 0x00000c00
	#define CG14_VCA_RAMSPEED_SHIFT 12
	#define CG14_VCA_RAMSPEED_MASK 0x00001000
	#define CG14_VCA_8MB_SHIFT 13
	#define CG14_VCA_8MB_MASK 0x00002000

	#define CG14_MCR_PIXMODE_8 0
	#define CG14_MCR_PIXMODE_16 2
	#define CG14_MCR_PIXMODE_32 3

	struct cg14_regs{
	u8 mcr; /* Master Control Reg */
	u8 ppr; /* Packed Pixel Reg */
	u8 tms[2]; /* Test Mode Status Regs */
	u8 msr; /* Master Status Reg */
	u8 fsr; /* Fault Status Reg */
	u8 rev; /* Revision & Impl */
	u8 ccr; /* Clock Control Reg */
	u32 tmr; /* Test Mode Read Back */
	u8 mod; /* Monitor Operation Data Reg */
	u8 acr; /* Aux Control */
	u8 xxx0[6];
	u16 hct; /* Hor Counter */
	u16 vct; /* Vert Counter */
	u16 hbs; /* Hor Blank Start */
	u16 hbc; /* Hor Blank Clear */
	u16 hss; /* Hor Sync Start */
	u16 hsc; /* Hor Sync Clear */
	u16 csc; /* Composite Sync Clear */
	u16 vbs; /* Vert Blank Start */
	u16 vbc; /* Vert Blank Clear */
	u16 vss; /* Vert Sync Start */
	u16 vsc; /* Vert Sync Clear */
	u16 xcs;
	u16 xcc;
	u16 fsa; /* Fault Status Address */
	u16 adr; /* Address Registers */
	u8 xxx1[0xce];
	u8 pcg[0x100]; /* Pixel Clock Generator */
	u32 vbr; /* Frame Base Row */
	u32 vmcr; /* VBC Master Control */
	u32 vcr; /* VBC refresh */
	u32 vca; /* VBC Config */
	};

	#define CG14_CCR_ENABLE 0x04
	#define CG14_CCR_SELECT 0x02 /* HW/Full screen */

	struct cg14_cursor {
	u32 cpl0[32]; /* Enable plane 0 */
	u32 cpl1[32]; /* Color selection plane */
	u8 ccr; /* Cursor Control Reg */
	u8 xxx0[3];
	u16 cursx; /* Cursor x,y position */
	u16 cursy; /* Cursor x,y position */
	u32 color0;
	u32 color1;
	u32 xxx1[0x1bc];
	u32 cpl0i[32]; /* Enable plane 0 autoinc */
	u32 cpl1i[32]; /* Color selection autoinc */
	};

	struct cg14_dac {
	u8 addr; /* Address Register */
	u8 xxx0[255];
	u8 glut; /* Gamma table */
	u8 xxx1[255];
	u8 select; /* Register Select */
	u8 xxx2[255];
	u8 mode; /* Mode Register */
	};

	struct cg14_xlut{
	u8 x_xlut [256];
	u8 x_xlutd [256];
	u8 xxx0[0x600];
	u8 x_xlut_inc [256];
	u8 x_xlutd_inc [256];
	};

	/* Color look up table (clut) */
	/* Each one of these arrays hold the color lookup table (for 256
	* colors) for each MDI page (I assume then there should be 4 MDI
	* pages, I still wonder what they are. I have seen NeXTStep split
	* the screen in four parts, while operating in 24 bits mode. Each
	* integer holds 4 values: alpha value (transparency channel, thanks
	* go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
	*
	* I currently use the clut instead of the Xlut
	*/
	struct cg14_clut {
	u32 c_clut [256];
	u32 c_clutd [256]; /* i wonder what the 'd' is for */
	u32 c_clut_inc [256];
	u32 c_clutd_inc [256];
	};

	#define CG14_MMAP_ENTRIES 16

	struct cg14_par {
	spinlock_t lock;
	struct cg14_regs __iomem *regs;
	struct cg14_clut __iomem *clut;
	struct cg14_cursor __iomem *cursor;

	u32 flags;
	#define CG14_FLAG_BLANKED 0x00000001

	unsigned long physbase;
	unsigned long iospace;
	unsigned long fbsize;

	struct sbus_mmap_map mmap_map[CG14_MMAP_ENTRIES];

	int mode;
	int ramsize;
	};

	static void __cg14_reset(struct cg14_par *par)
	{
	struct cg14_regs __iomem *regs = par->regs;
	u8 val;

	val = sbus_readb(&regs->mcr);
	val &= ~(CG14_MCR_PIXMODE_MASK);
	sbus_writeb(val, &regs->mcr);
	}

	static int cg14_pan_display(struct fb_var_screeninfo var, struct fb_info info)
	{
	struct cg14_par par = (struct cg14_par ) info->par;
	unsigned long flags;

	/* We just use this to catch switches out of
	* graphics mode.
	*/
	spin_lock_irqsave(&par->lock, flags);
	__cg14_reset(par);
	spin_unlock_irqrestore(&par->lock, flags);

	if (var->xoffset \|\| var->yoffset \|\| var->vmode)
	return -EINVAL;
	return 0;
	}

	/**
	* cg14_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
	*/
	static int cg14_setcolreg(unsigned regno,
	unsigned red, unsigned green, unsigned blue,
	unsigned transp, struct fb_info *info)
	{
	struct cg14_par par = (struct cg14_par ) info->par;
	struct cg14_clut __iomem *clut = par->clut;
	unsigned long flags;
	u32 val;

	if (regno >= 256)
	return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;
	val = (red \| (green << 8) \| (blue << 16));

	spin_lock_irqsave(&par->lock, flags);
	sbus_writel(val, &clut->c_clut[regno]);
	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
	}

	static int cg14_mmap(struct fb_info info, struct vm_area_struct vma)
	{
	struct cg14_par par = (struct cg14_par ) info->par;

	return sbusfb_mmap_helper(par->mmap_map,
	par->physbase, par->fbsize,
	par->iospace, vma);
	}

	static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
	{
	struct cg14_par par = (struct cg14_par ) info->par;
	struct cg14_regs __iomem *regs = par->regs;
	struct mdi_cfginfo kmdi, __user *mdii;
	unsigned long flags;
	int cur_mode, mode, ret = 0;

	switch (cmd) {
	case MDI_RESET:
	spin_lock_irqsave(&par->lock, flags);
	__cg14_reset(par);
	spin_unlock_irqrestore(&par->lock, flags);
	break;

	case MDI_GET_CFGINFO:
	memset(&kmdi, 0, sizeof(kmdi));

	spin_lock_irqsave(&par->lock, flags);
	kmdi.mdi_type = FBTYPE_MDICOLOR;
	kmdi.mdi_height = info->var.yres;
	kmdi.mdi_width = info->var.xres;
	kmdi.mdi_mode = par->mode;
	kmdi.mdi_pixfreq = 72; /* FIXME */
	kmdi.mdi_size = par->ramsize;
	spin_unlock_irqrestore(&par->lock, flags);

	mdii = (struct mdi_cfginfo __user *) arg;
	if (copy_to_user(mdii, &kmdi, sizeof(kmdi)))
	ret = -EFAULT;
	break;

	case MDI_SET_PIXELMODE:
	if (get_user(mode, (int __user *) arg)) {
	ret = -EFAULT;
	break;
	}

	spin_lock_irqsave(&par->lock, flags);
	cur_mode = sbus_readb(&regs->mcr);
	cur_mode &= ~CG14_MCR_PIXMODE_MASK;
	switch(mode) {
	case MDI_32_PIX:
	cur_mode \|= (CG14_MCR_PIXMODE_32 <<
	CG14_MCR_PIXMODE_SHIFT);
	break;

	case MDI_16_PIX:
	cur_mode \|= (CG14_MCR_PIXMODE_16 <<
	CG14_MCR_PIXMODE_SHIFT);
	break;

	case MDI_8_PIX:
	break;

	default:
	ret = -ENOSYS;
	break;
	};
	if (!ret) {
	sbus_writeb(cur_mode, &regs->mcr);
	par->mode = mode;
	}
	spin_unlock_irqrestore(&par->lock, flags);
	break;

	default:
	ret = sbusfb_ioctl_helper(cmd, arg, info,
	FBTYPE_MDICOLOR, 8, par->fbsize);
	break;
	};

	return ret;
	}

	/*
	* Initialisation
	*/

	static void __devinit cg14_init_fix(struct fb_info *info, int linebytes,
	struct device_node *dp)
	{
	const char *name = dp->name;

	strlcpy(info->fix.id, 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_CG14;
	}

	static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] __devinitdata = {
	{
	.voff = CG14_REGS,
	.poff = 0x80000000,
	.size = 0x1000
	},
	{
	.voff = CG14_XLUT,
	.poff = 0x80003000,
	.size = 0x1000
	},
	{
	.voff = CG14_CLUT1,
	.poff = 0x80004000,
	.size = 0x1000
	},
	{
	.voff = CG14_CLUT2,
	.poff = 0x80005000,
	.size = 0x1000
	},
	{
	.voff = CG14_CLUT3,
	.poff = 0x80006000,
	.size = 0x1000
	},
	{
	.voff = CG3_MMAP_OFFSET - 0x7000,
	.poff = 0x80000000,
	.size = 0x7000
	},
	{
	.voff = CG3_MMAP_OFFSET,
	.poff = 0x00000000,
	.size = SBUS_MMAP_FBSIZE(1)
	},
	{
	.voff = MDI_CURSOR_MAP,
	.poff = 0x80001000,
	.size = 0x1000
	},
	{
	.voff = MDI_CHUNKY_BGR_MAP,
	.poff = 0x01000000,
	.size = 0x400000
	},
	{
	.voff = MDI_PLANAR_X16_MAP,
	.poff = 0x02000000,
	.size = 0x200000
	},
	{
	.voff = MDI_PLANAR_C16_MAP,
	.poff = 0x02800000,
	.size = 0x200000
	},
	{
	.voff = MDI_PLANAR_X32_MAP,
	.poff = 0x03000000,
	.size = 0x100000
	},
	{
	.voff = MDI_PLANAR_B32_MAP,
	.poff = 0x03400000,
	.size = 0x100000
	},
	{
	.voff = MDI_PLANAR_G32_MAP,
	.poff = 0x03800000,
	.size = 0x100000
	},
	{
	.voff = MDI_PLANAR_R32_MAP,
	.poff = 0x03c00000,
	.size = 0x100000
	},
	{ .size = 0 }
	};

	static void cg14_unmap_regs(struct of_device op, struct fb_info info,
	struct cg14_par *par)
	{
	if (par->regs)
	of_iounmap(&op->resource[0],
	par->regs, sizeof(struct cg14_regs));
	if (par->clut)
	of_iounmap(&op->resource[0],
	par->clut, sizeof(struct cg14_clut));
	if (par->cursor)
	of_iounmap(&op->resource[0],
	par->cursor, sizeof(struct cg14_cursor));
	if (info->screen_base)
	of_iounmap(&op->resource[1],
	info->screen_base, par->fbsize);
	}

	static int __devinit cg14_probe(struct of_device op, const struct of_device_id match)
	{
	struct device_node *dp = op->node;
	struct fb_info *info;
	struct cg14_par *par;
	int is_8mb, linebytes, i, err;

	info = framebuffer_alloc(sizeof(struct cg14_par), &op->dev);

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

	spin_lock_init(&par->lock);

	sbusfb_fill_var(&info->var, dp, 8);
	info->var.red.length = 8;
	info->var.green.length = 8;
	info->var.blue.length = 8;

	linebytes = of_getintprop_default(dp, "linebytes",
	info->var.xres);
	par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);

	if (!strcmp(dp->parent->name, "sbus") \|\|
	!strcmp(dp->parent->name, "sbi")) {
	par->physbase = op->resource[0].start;
	par->iospace = op->resource[0].flags & IORESOURCE_BITS;
	} else {
	par->physbase = op->resource[1].start;
	par->iospace = op->resource[0].flags & IORESOURCE_BITS;
	}

	par->regs = of_ioremap(&op->resource[0], 0,
	sizeof(struct cg14_regs), "cg14 regs");
	par->clut = of_ioremap(&op->resource[0], CG14_CLUT1,
	sizeof(struct cg14_clut), "cg14 clut");
	par->cursor = of_ioremap(&op->resource[0], CG14_CURSORREGS,
	sizeof(struct cg14_cursor), "cg14 cursor");

	info->screen_base = of_ioremap(&op->resource[1], 0,
	par->fbsize, "cg14 ram");

	if (!par->regs \|\| !par->clut \|\| !par->cursor \|\| !info->screen_base)
	goto out_unmap_regs;

	is_8mb = (((op->resource[1].end - op->resource[1].start) + 1) ==
	(8 * 1024 * 1024));

	BUILD_BUG_ON(sizeof(par->mmap_map) != sizeof(__cg14_mmap_map));

	memcpy(&par->mmap_map, &__cg14_mmap_map, sizeof(par->mmap_map));

	for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
	struct sbus_mmap_map *map = &par->mmap_map[i];

	if (!map->size)
	break;
	if (map->poff & 0x80000000)
	map->poff = (map->poff & 0x7fffffff) +
	(op->resource[0].start -
	op->resource[1].start);
	if (is_8mb &&
	map->size >= 0x100000 &&
	map->size <= 0x400000)
	map->size *= 2;
	}

	par->mode = MDI_8_PIX;
	par->ramsize = (is_8mb ? 0x800000 : 0x400000);

	info->flags = FBINFO_DEFAULT \| FBINFO_HWACCEL_YPAN;
	info->fbops = &cg14_ops;

	__cg14_reset(par);

	if (fb_alloc_cmap(&info->cmap, 256, 0))
	goto out_unmap_regs;

	fb_set_cmap(&info->cmap, info);

	cg14_init_fix(info, linebytes, dp);

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

	dev_set_drvdata(&op->dev, info);

	printk(KERN_INFO "%s: cgfourteen at %lx:%lx, %dMB\n",
	dp->full_name,
	par->iospace, par->physbase,
	par->ramsize >> 20);

	return 0;

	out_dealloc_cmap:
	fb_dealloc_cmap(&info->cmap);

	out_unmap_regs:
	cg14_unmap_regs(op, info, par);

	out_err:
	return err;
	}

	static int __devexit cg14_remove(struct of_device *op)
	{
	struct fb_info *info = dev_get_drvdata(&op->dev);
	struct cg14_par *par = info->par;

	unregister_framebuffer(info);
	fb_dealloc_cmap(&info->cmap);

	cg14_unmap_regs(op, info, par);

	framebuffer_release(info);

	dev_set_drvdata(&op->dev, NULL);

	return 0;
	}

	static struct of_device_id cg14_match[] = {
	{
	.name = "cgfourteen",
	},
	{},
	};
	MODULE_DEVICE_TABLE(of, cg14_match);

	static struct of_platform_driver cg14_driver = {
	.name = "cg14",
	.match_table = cg14_match,
	.probe = cg14_probe,
	.remove = __devexit_p(cg14_remove),
	};

	static int __init cg14_init(void)
	{
	if (fb_get_options("cg14fb", NULL))
	return -ENODEV;

	return of_register_driver(&cg14_driver, &of_bus_type);
	}

	static void __exit cg14_exit(void)
	{
	of_unregister_driver(&cg14_driver);
	}

	module_init(cg14_init);
	module_exit(cg14_exit);

	MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
	MODULE_VERSION("2.0");
	MODULE_LICENSE("GPL");