[linux-block.git] / drivers / video / fbdev / tcx.c

// SPDX-License-Identifier: GPL-2.0-only
/* tcx.c: TCX 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) 1996 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/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/of_device.h>

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

#include "sbuslib.h"

/*
 * Local functions.
 */

static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
			 unsigned, struct fb_info *);
static int tcx_blank(int, struct fb_info *);

static int tcx_mmap(struct fb_info *, struct vm_area_struct *);
static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);

/*
 *  Frame buffer operations
 */

static struct fb_ops tcx_ops = {
	.owner			= THIS_MODULE,
	.fb_setcolreg		= tcx_setcolreg,
	.fb_blank		= tcx_blank,
	.fb_pan_display		= tcx_pan_display,
	.fb_fillrect		= cfb_fillrect,
	.fb_copyarea		= cfb_copyarea,
	.fb_imageblit		= cfb_imageblit,
	.fb_mmap		= tcx_mmap,
	.fb_ioctl		= tcx_ioctl,
#ifdef CONFIG_COMPAT
	.fb_compat_ioctl	= sbusfb_compat_ioctl,
#endif
};

/* THC definitions */
#define TCX_THC_MISC_REV_SHIFT       16
#define TCX_THC_MISC_REV_MASK        15
#define TCX_THC_MISC_VSYNC_DIS       (1 << 25)
#define TCX_THC_MISC_HSYNC_DIS       (1 << 24)
#define TCX_THC_MISC_RESET           (1 << 12)
#define TCX_THC_MISC_VIDEO           (1 << 10)
#define TCX_THC_MISC_SYNC            (1 << 9)
#define TCX_THC_MISC_VSYNC           (1 << 8)
#define TCX_THC_MISC_SYNC_ENAB       (1 << 7)
#define TCX_THC_MISC_CURS_RES        (1 << 6)
#define TCX_THC_MISC_INT_ENAB        (1 << 5)
#define TCX_THC_MISC_INT             (1 << 4)
#define TCX_THC_MISC_INIT            0x9f
#define TCX_THC_REV_REV_SHIFT        20
#define TCX_THC_REV_REV_MASK         15
#define TCX_THC_REV_MINREV_SHIFT     28
#define TCX_THC_REV_MINREV_MASK      15

/* The contents are unknown */
struct tcx_tec {
	u32 tec_matrix;
	u32 tec_clip;
	u32 tec_vdc;
};

struct tcx_thc {
	u32 thc_rev;
	u32 thc_pad0[511];
	u32 thc_hs;		/* hsync timing */
	u32 thc_hsdvs;
	u32 thc_hd;
	u32 thc_vs;		/* vsync timing */
	u32 thc_vd;
	u32 thc_refresh;
	u32 thc_misc;
	u32 thc_pad1[56];
	u32 thc_cursxy;	/* cursor x,y position (16 bits each) */
	u32 thc_cursmask[32];	/* cursor mask bits */
	u32 thc_cursbits[32];	/* what to show where mask enabled */
};

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

#define TCX_MMAP_ENTRIES 14

struct tcx_par {
	spinlock_t		lock;
	struct bt_regs		__iomem *bt;
	struct tcx_thc		__iomem *thc;
	struct tcx_tec		__iomem *tec;
	u32			__iomem *cplane;

	u32			flags;
#define TCX_FLAG_BLANKED	0x00000001

	unsigned long		which_io;

	struct sbus_mmap_map	mmap_map[TCX_MMAP_ENTRIES];
	int			lowdepth;
};

/* Reset control plane so that WID is 8-bit plane. */
static void __tcx_set_control_plane(struct fb_info *info)
{
	struct tcx_par *par = info->par;
	u32 __iomem *p, *pend;

	if (par->lowdepth)
		return;

	p = par->cplane;
	if (p == NULL)
		return;
	for (pend = p + info->fix.smem_len; p < pend; p++) {
		u32 tmp = sbus_readl(p);

		tmp &= 0xffffff;
		sbus_writel(tmp, p);
	}
}

static void tcx_reset(struct fb_info *info)
{
	struct tcx_par *par = (struct tcx_par *) info->par;
	unsigned long flags;

	spin_lock_irqsave(&par->lock, flags);
	__tcx_set_control_plane(info);
	spin_unlock_irqrestore(&par->lock, flags);
}

static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
	tcx_reset(info);
	return 0;
}

/**
 *      tcx_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 tcx_setcolreg(unsigned regno,
			 unsigned red, unsigned green, unsigned blue,
			 unsigned transp, struct fb_info *info)
{
	struct tcx_par *par = (struct tcx_par *) info->par;
	struct bt_regs __iomem *bt = par->bt;
	unsigned long flags;

	if (regno >= 256)
		return 1;

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

	spin_lock_irqsave(&par->lock, flags);

	sbus_writel(regno << 24, &bt->addr);
	sbus_writel(red << 24, &bt->color_map);
	sbus_writel(green << 24, &bt->color_map);
	sbus_writel(blue << 24, &bt->color_map);

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

/**
 *      tcx_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
tcx_blank(int blank, struct fb_info *info)
{
	struct tcx_par *par = (struct tcx_par *) info->par;
	struct tcx_thc __iomem *thc = par->thc;
	unsigned long flags;
	u32 val;

	spin_lock_irqsave(&par->lock, flags);

	val = sbus_readl(&thc->thc_misc);

	switch (blank) {
	case FB_BLANK_UNBLANK: /* Unblanking */
		val &= ~(TCX_THC_MISC_VSYNC_DIS |
			 TCX_THC_MISC_HSYNC_DIS);
		val |= TCX_THC_MISC_VIDEO;
		par->flags &= ~TCX_FLAG_BLANKED;
		break;

	case FB_BLANK_NORMAL: /* Normal blanking */
		val &= ~TCX_THC_MISC_VIDEO;
		par->flags |= TCX_FLAG_BLANKED;
		break;

	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
		val |= TCX_THC_MISC_VSYNC_DIS;
		break;
	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
		val |= TCX_THC_MISC_HSYNC_DIS;
		break;

	case FB_BLANK_POWERDOWN: /* Poweroff */
		break;
	}

	sbus_writel(val, &thc->thc_misc);

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
	{
		.voff	= TCX_RAM8BIT,
		.size	= SBUS_MMAP_FBSIZE(1)
	},
	{
		.voff	= TCX_RAM24BIT,
		.size	= SBUS_MMAP_FBSIZE(4)
	},
	{
		.voff	= TCX_UNK3,
		.size	= SBUS_MMAP_FBSIZE(8)
	},
	{
		.voff	= TCX_UNK4,
		.size	= SBUS_MMAP_FBSIZE(8)
	},
	{
		.voff	= TCX_CONTROLPLANE,
		.size	= SBUS_MMAP_FBSIZE(4)
	},
	{
		.voff	= TCX_UNK6,
		.size	= SBUS_MMAP_FBSIZE(8)
	},
	{
		.voff	= TCX_UNK7,
		.size	= SBUS_MMAP_FBSIZE(8)
	},
	{
		.voff	= TCX_TEC,
		.size	= PAGE_SIZE
	},
	{
		.voff	= TCX_BTREGS,
		.size	= PAGE_SIZE
	},
	{
		.voff	= TCX_THC,
		.size	= PAGE_SIZE
	},
	{
		.voff	= TCX_DHC,
		.size	= PAGE_SIZE
	},
	{
		.voff	= TCX_ALT,
		.size	= PAGE_SIZE
	},
	{
		.voff	= TCX_UNK2,
		.size	= 0x20000
	},
	{ .size = 0 }
};

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

	return sbusfb_mmap_helper(par->mmap_map,
				  info->fix.smem_start, info->fix.smem_len,
				  par->which_io, vma);
}

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

	return sbusfb_ioctl_helper(cmd, arg, info,
				   FBTYPE_TCXCOLOR,
				   (par->lowdepth ? 8 : 24),
				   info->fix.smem_len);
}

/*
 *  Initialisation
 */

static void
tcx_init_fix(struct fb_info *info, int linebytes)
{
	struct tcx_par *par = (struct tcx_par *)info->par;
	const char *tcx_name;

	if (par->lowdepth)
		tcx_name = "TCX8";
	else
		tcx_name = "TCX24";

	strlcpy(info->fix.id, tcx_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_TCX;
}

static void tcx_unmap_regs(struct platform_device *op, struct fb_info *info,
			   struct tcx_par *par)
{
	if (par->tec)
		of_iounmap(&op->resource[7],
			   par->tec, sizeof(struct tcx_tec));
	if (par->thc)
		of_iounmap(&op->resource[9],
			   par->thc, sizeof(struct tcx_thc));
	if (par->bt)
		of_iounmap(&op->resource[8],
			   par->bt, sizeof(struct bt_regs));
	if (par->cplane)
		of_iounmap(&op->resource[4],
			   par->cplane, info->fix.smem_len * sizeof(u32));
	if (info->screen_base)
		of_iounmap(&op->resource[0],
			   info->screen_base, info->fix.smem_len);
}

static int tcx_probe(struct platform_device *op)
{
	struct device_node *dp = op->dev.of_node;
	struct fb_info *info;
	struct tcx_par *par;
	int linebytes, i, err;

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

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

	spin_lock_init(&par->lock);

	par->lowdepth =
		(of_find_property(dp, "tcx-8-bit", NULL) != NULL);

	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);
	info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);

	par->tec = of_ioremap(&op->resource[7], 0,
				  sizeof(struct tcx_tec), "tcx tec");
	par->thc = of_ioremap(&op->resource[9], 0,
				  sizeof(struct tcx_thc), "tcx thc");
	par->bt = of_ioremap(&op->resource[8], 0,
				 sizeof(struct bt_regs), "tcx dac");
	info->screen_base = of_ioremap(&op->resource[0], 0,
					   info->fix.smem_len, "tcx ram");
	if (!par->tec || !par->thc ||
	    !par->bt || !info->screen_base)
		goto out_unmap_regs;

	memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
	if (!par->lowdepth) {
		par->cplane = of_ioremap(&op->resource[4], 0,
					     info->fix.smem_len * sizeof(u32),
					     "tcx cplane");
		if (!par->cplane)
			goto out_unmap_regs;
	} else {
		par->mmap_map[1].size = SBUS_MMAP_EMPTY;
		par->mmap_map[4].size = SBUS_MMAP_EMPTY;
		par->mmap_map[5].size = SBUS_MMAP_EMPTY;
		par->mmap_map[6].size = SBUS_MMAP_EMPTY;
	}

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

	for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
		int j;

		switch (i) {
		case 10:
			j = 12;
			break;

		case 11: case 12:
			j = i - 1;
			break;

		default:
			j = i;
			break;
		}
		par->mmap_map[i].poff = op->resource[j].start;
	}

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

	/* Initialize brooktree DAC. */
	sbus_writel(0x04 << 24, &par->bt->addr);         /* color planes */
	sbus_writel(0xff << 24, &par->bt->control);
	sbus_writel(0x05 << 24, &par->bt->addr);
	sbus_writel(0x00 << 24, &par->bt->control);
	sbus_writel(0x06 << 24, &par->bt->addr);         /* overlay plane */
	sbus_writel(0x73 << 24, &par->bt->control);
	sbus_writel(0x07 << 24, &par->bt->addr);
	sbus_writel(0x00 << 24, &par->bt->control);

	tcx_reset(info);

	tcx_blank(FB_BLANK_UNBLANK, info);

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

	fb_set_cmap(&info->cmap, info);
	tcx_init_fix(info, linebytes);

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

	dev_set_drvdata(&op->dev, info);

	printk(KERN_INFO "%pOF: TCX at %lx:%lx, %s\n",
	       dp,
	       par->which_io,
	       info->fix.smem_start,
	       par->lowdepth ? "8-bit only" : "24-bit depth");

	return 0;

out_dealloc_cmap:
	fb_dealloc_cmap(&info->cmap);

out_unmap_regs:
	tcx_unmap_regs(op, info, par);
	framebuffer_release(info);

out_err:
	return err;
}

static int tcx_remove(struct platform_device *op)
{
	struct fb_info *info = dev_get_drvdata(&op->dev);
	struct tcx_par *par = info->par;

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

	tcx_unmap_regs(op, info, par);

	framebuffer_release(info);

	return 0;
}

static const struct of_device_id tcx_match[] = {
	{
		.name = "SUNW,tcx",
	},
	{},
};
MODULE_DEVICE_TABLE(of, tcx_match);

static struct platform_driver tcx_driver = {
	.driver = {
		.name = "tcx",
		.of_match_table = tcx_match,
	},
	.probe		= tcx_probe,
	.remove		= tcx_remove,
};

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

	return platform_driver_register(&tcx_driver);
}

static void __exit tcx_exit(void)
{
	platform_driver_unregister(&tcx_driver);
}

module_init(tcx_init);
module_exit(tcx_exit);

MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/* tcx.c: TCX frame buffer driver
1da177e4 LT	3	*
50312ce9	4	* Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
1da177e4 LT	5	* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
	6	* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
	7	* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
	8	*
	9	* Driver layout based loosely on tgafb.c, see that file for credits.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/kernel.h>
	14	#include <linux/errno.h>
	15	#include <linux/string.h>
1da177e4 LT	16	#include <linux/delay.h>
	17	#include <linux/init.h>
	18	#include <linux/fb.h>
	19	#include <linux/mm.h>
6cd5a86b	20	#include <linux/of_device.h>
1da177e4 LT	21
1da177e4 LT	22	#include <asm/io.h>
1da177e4 LT	23	#include <asm/fbio.h>
	24
	25	#include "sbuslib.h"
	26
	27	/*
	28	* Local functions.
	29	*/
	30
	31	static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
	32	unsigned, struct fb_info *);
	33	static int tcx_blank(int, struct fb_info *);
	34
216d526c	35	static int tcx_mmap(struct fb_info , struct vm_area_struct );
67a6680d	36	static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
6ee7c152	37	static int tcx_pan_display(struct fb_var_screeninfo , struct fb_info );
1da177e4 LT	38
	39	/*
	40	* Frame buffer operations
	41	*/
	42
	43	static struct fb_ops tcx_ops = {
	44	.owner = THIS_MODULE,
	45	.fb_setcolreg = tcx_setcolreg,
	46	.fb_blank = tcx_blank,
6ee7c152	47	.fb_pan_display = tcx_pan_display,
1da177e4 LT	48	.fb_fillrect = cfb_fillrect,
	49	.fb_copyarea = cfb_copyarea,
	50	.fb_imageblit = cfb_imageblit,
	51	.fb_mmap = tcx_mmap,
	52	.fb_ioctl = tcx_ioctl,
9ffb83bc CH	53	#ifdef CONFIG_COMPAT
	54	.fb_compat_ioctl = sbusfb_compat_ioctl,
	55	#endif
1da177e4 LT	56	};
	57
	58	/* THC definitions */
	59	#define TCX_THC_MISC_REV_SHIFT 16
	60	#define TCX_THC_MISC_REV_MASK 15
	61	#define TCX_THC_MISC_VSYNC_DIS (1 << 25)
	62	#define TCX_THC_MISC_HSYNC_DIS (1 << 24)
	63	#define TCX_THC_MISC_RESET (1 << 12)
	64	#define TCX_THC_MISC_VIDEO (1 << 10)
	65	#define TCX_THC_MISC_SYNC (1 << 9)
	66	#define TCX_THC_MISC_VSYNC (1 << 8)
	67	#define TCX_THC_MISC_SYNC_ENAB (1 << 7)
	68	#define TCX_THC_MISC_CURS_RES (1 << 6)
	69	#define TCX_THC_MISC_INT_ENAB (1 << 5)
	70	#define TCX_THC_MISC_INT (1 << 4)
	71	#define TCX_THC_MISC_INIT 0x9f
	72	#define TCX_THC_REV_REV_SHIFT 20
	73	#define TCX_THC_REV_REV_MASK 15
	74	#define TCX_THC_REV_MINREV_SHIFT 28
	75	#define TCX_THC_REV_MINREV_MASK 15
	76
	77	/* The contents are unknown */
	78	struct tcx_tec {
50312ce9 DM	79	u32 tec_matrix;
	80	u32 tec_clip;
	81	u32 tec_vdc;
1da177e4 LT	82	};
	83
	84	struct tcx_thc {
50312ce9	85	u32 thc_rev;
5b81d689	86	u32 thc_pad0[511];
50312ce9 DM	87	u32 thc_hs; /* hsync timing */
	88	u32 thc_hsdvs;
	89	u32 thc_hd;
	90	u32 thc_vs; /* vsync timing */
	91	u32 thc_vd;
	92	u32 thc_refresh;
	93	u32 thc_misc;
1da177e4	94	u32 thc_pad1[56];
50312ce9 DM	95	u32 thc_cursxy; /* cursor x,y position (16 bits each) */
	96	u32 thc_cursmask[32]; /* cursor mask bits */
	97	u32 thc_cursbits[32]; /* what to show where mask enabled */
1da177e4 LT	98	};
	99
	100	struct bt_regs {
50312ce9 DM	101	u32 addr;
	102	u32 color_map;
	103	u32 control;
	104	u32 cursor;
1da177e4 LT	105	};
	106
	107	#define TCX_MMAP_ENTRIES 14
	108
	109	struct tcx_par {
	110	spinlock_t lock;
	111	struct bt_regs __iomem *bt;
	112	struct tcx_thc __iomem *thc;
	113	struct tcx_tec __iomem *tec;
50312ce9	114	u32 __iomem *cplane;
1da177e4 LT	115
	116	u32 flags;
	117	#define TCX_FLAG_BLANKED 0x00000001
	118
50312ce9	119	unsigned long which_io;
1da177e4 LT	120
	121	struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
	122	int lowdepth;
1da177e4 LT	123	};
	124
	125	/* Reset control plane so that WID is 8-bit plane. */
fe3a1aa2	126	static void __tcx_set_control_plane(struct fb_info *info)
1da177e4	127	{
fe3a1aa2	128	struct tcx_par *par = info->par;
50312ce9	129	u32 __iomem p, pend;
5b81d689	130
1da177e4 LT	131	if (par->lowdepth)
	132	return;
	133
	134	p = par->cplane;
	135	if (p == NULL)
	136	return;
fe3a1aa2	137	for (pend = p + info->fix.smem_len; p < pend; p++) {
1da177e4 LT	138	u32 tmp = sbus_readl(p);
	139
	140	tmp &= 0xffffff;
	141	sbus_writel(tmp, p);
	142	}
	143	}
5b81d689 RR	144
5b81d689 RR	145	static void tcx_reset(struct fb_info *info)
1da177e4 LT	146	{
	147	struct tcx_par par = (struct tcx_par ) info->par;
	148	unsigned long flags;
	149
	150	spin_lock_irqsave(&par->lock, flags);
fe3a1aa2	151	__tcx_set_control_plane(info);
1da177e4 LT	152	spin_unlock_irqrestore(&par->lock, flags);
	153	}
	154
6ee7c152 TC	155	static int tcx_pan_display(struct fb_var_screeninfo var, struct fb_info info)
	156	{
	157	tcx_reset(info);
	158	return 0;
	159	}
	160
1da177e4 LT	161	/**
	162	* tcx_setcolreg - Optional function. Sets a color register.
	163	* @regno: boolean, 0 copy local, 1 get_user() function
	164	* @red: frame buffer colormap structure
	165	* @green: The green value which can be up to 16 bits wide
	166	* @blue: The blue value which can be up to 16 bits wide.
	167	* @transp: If supported the alpha value which can be up to 16 bits wide.
	168	* @info: frame buffer info structure
	169	*/
	170	static int tcx_setcolreg(unsigned regno,
	171	unsigned red, unsigned green, unsigned blue,
	172	unsigned transp, struct fb_info *info)
	173	{
	174	struct tcx_par par = (struct tcx_par ) info->par;
	175	struct bt_regs __iomem *bt = par->bt;
	176	unsigned long flags;
	177
	178	if (regno >= 256)
	179	return 1;
	180
	181	red >>= 8;
	182	green >>= 8;
	183	blue >>= 8;
	184
	185	spin_lock_irqsave(&par->lock, flags);
	186
	187	sbus_writel(regno << 24, &bt->addr);
	188	sbus_writel(red << 24, &bt->color_map);
	189	sbus_writel(green << 24, &bt->color_map);
	190	sbus_writel(blue << 24, &bt->color_map);
	191
	192	spin_unlock_irqrestore(&par->lock, flags);
	193
	194	return 0;
	195	}
	196
	197	/**
	198	* tcx_blank - Optional function. Blanks the display.
	199	* @blank_mode: the blank mode we want.
	200	* @info: frame buffer structure that represents a single frame buffer
	201	*/
	202	static int
	203	tcx_blank(int blank, struct fb_info *info)
	204	{
	205	struct tcx_par par = (struct tcx_par ) info->par;
	206	struct tcx_thc __iomem *thc = par->thc;
	207	unsigned long flags;
	208	u32 val;
	209
	210	spin_lock_irqsave(&par->lock, flags);
	211
	212	val = sbus_readl(&thc->thc_misc);
	213
	214	switch (blank) {
	215	case FB_BLANK_UNBLANK: /* Unblanking */
	216	val &= ~(TCX_THC_MISC_VSYNC_DIS \|
	217	TCX_THC_MISC_HSYNC_DIS);
	218	val \|= TCX_THC_MISC_VIDEO;
	219	par->flags &= ~TCX_FLAG_BLANKED;
	220	break;
	221
	222	case FB_BLANK_NORMAL: /* Normal blanking */
	223	val &= ~TCX_THC_MISC_VIDEO;
	224	par->flags \|= TCX_FLAG_BLANKED;
225	break;
226
227	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
228	val \|= TCX_THC_MISC_VSYNC_DIS;
229	break;
230	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
231	val \|= TCX_THC_MISC_HSYNC_DIS;
232	break;
233
234	case FB_BLANK_POWERDOWN: /* Poweroff */
235	break;
cf6ac4ce	236	}
1da177e4 LT	237
	238	sbus_writel(val, &thc->thc_misc);
	239
	240	spin_unlock_irqrestore(&par->lock, flags);
	241
	242	return 0;
	243	}
	244
	245	static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
	246	{
	247	.voff = TCX_RAM8BIT,
	248	.size = SBUS_MMAP_FBSIZE(1)
	249	},
	250	{
	251	.voff = TCX_RAM24BIT,
	252	.size = SBUS_MMAP_FBSIZE(4)
	253	},
	254	{
	255	.voff = TCX_UNK3,
	256	.size = SBUS_MMAP_FBSIZE(8)
	257	},
	258	{
	259	.voff = TCX_UNK4,
	260	.size = SBUS_MMAP_FBSIZE(8)
	261	},
	262	{
	263	.voff = TCX_CONTROLPLANE,
	264	.size = SBUS_MMAP_FBSIZE(4)
	265	},
	266	{
	267	.voff = TCX_UNK6,
	268	.size = SBUS_MMAP_FBSIZE(8)
	269	},
	270	{
	271	.voff = TCX_UNK7,
	272	.size = SBUS_MMAP_FBSIZE(8)
	273	},
	274	{
	275	.voff = TCX_TEC,
	276	.size = PAGE_SIZE
	277	},
	278	{
	279	.voff = TCX_BTREGS,
	280	.size = PAGE_SIZE
	281	},
	282	{
	283	.voff = TCX_THC,
	284	.size = PAGE_SIZE
	285	},
	286	{
	287	.voff = TCX_DHC,
	288	.size = PAGE_SIZE
	289	},
	290	{
	291	.voff = TCX_ALT,
	292	.size = PAGE_SIZE
	293	},
	294	{
	295	.voff = TCX_UNK2,
	296	.size = 0x20000
	297	},
	298	{ .size = 0 }
	299	};
	300
216d526c	301	static int tcx_mmap(struct fb_info info, struct vm_area_struct vma)
1da177e4 LT	302	{
	303	struct tcx_par par = (struct tcx_par )info->par;
	304
	305	return sbusfb_mmap_helper(par->mmap_map,
fe3a1aa2	306	info->fix.smem_start, info->fix.smem_len,
50312ce9	307	par->which_io, vma);
1da177e4 LT	308	}
1da177e4 LT	309
67a6680d CH	310	static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
67a6680d CH	311	unsigned long arg)
1da177e4 LT	312	{
	313	struct tcx_par par = (struct tcx_par ) info->par;
	314
	315	return sbusfb_ioctl_helper(cmd, arg, info,
	316	FBTYPE_TCXCOLOR,
	317	(par->lowdepth ? 8 : 24),
fe3a1aa2	318	info->fix.smem_len);
1da177e4 LT	319	}
	320
	321	/*
	322	* Initialisation
	323	*/
	324
	325	static void
	326	tcx_init_fix(struct fb_info *info, int linebytes)
	327	{
	328	struct tcx_par par = (struct tcx_par )info->par;
	329	const char *tcx_name;
	330
	331	if (par->lowdepth)
	332	tcx_name = "TCX8";
	333	else
	334	tcx_name = "TCX24";
	335
	336	strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
	337
	338	info->fix.type = FB_TYPE_PACKED_PIXELS;
	339	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
	340
	341	info->fix.line_length = linebytes;
	342
	343	info->fix.accel = FB_ACCEL_SUN_TCX;
	344	}
	345
2dc11581	346	static void tcx_unmap_regs(struct platform_device op, struct fb_info info,
c7f439b9	347	struct tcx_par *par)
1da177e4	348	{
c7f439b9	349	if (par->tec)
e3a411a3	350	of_iounmap(&op->resource[7],
c7f439b9 DM	351	par->tec, sizeof(struct tcx_tec));
c7f439b9 DM	352	if (par->thc)
e3a411a3	353	of_iounmap(&op->resource[9],
c7f439b9 DM	354	par->thc, sizeof(struct tcx_thc));
c7f439b9 DM	355	if (par->bt)
e3a411a3	356	of_iounmap(&op->resource[8],
c7f439b9 DM	357	par->bt, sizeof(struct bt_regs));
c7f439b9 DM	358	if (par->cplane)
e3a411a3	359	of_iounmap(&op->resource[4],
fe3a1aa2	360	par->cplane, info->fix.smem_len * sizeof(u32));
c7f439b9	361	if (info->screen_base)
e3a411a3	362	of_iounmap(&op->resource[0],
fe3a1aa2	363	info->screen_base, info->fix.smem_len);
50312ce9	364	}
1da177e4	365
48c68c4f	366	static int tcx_probe(struct platform_device *op)
50312ce9	367	{
d4b8b2c2	368	struct device_node *dp = op->dev.of_node;
c7f439b9 DM	369	struct fb_info *info;
c7f439b9 DM	370	struct tcx_par *par;
50312ce9	371	int linebytes, i, err;
1da177e4	372
c7f439b9	373	info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev);
1da177e4	374
c7f439b9 DM	375	err = -ENOMEM;
	376	if (!info)
	377	goto out_err;
	378	par = info->par;
1da177e4	379
c7f439b9 DM	380	spin_lock_init(&par->lock);
	381
	382	par->lowdepth =
50312ce9	383	(of_find_property(dp, "tcx-8-bit", NULL) != NULL);
1da177e4	384
6cd5a86b	385	sbusfb_fill_var(&info->var, dp, 8);
c7f439b9 DM	386	info->var.red.length = 8;
	387	info->var.green.length = 8;
	388	info->var.blue.length = 8;
1da177e4	389
50312ce9	390	linebytes = of_getintprop_default(dp, "linebytes",
c7f439b9	391	info->var.xres);
fe3a1aa2	392	info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
1da177e4	393
c7f439b9	394	par->tec = of_ioremap(&op->resource[7], 0,
50312ce9	395	sizeof(struct tcx_tec), "tcx tec");
c7f439b9	396	par->thc = of_ioremap(&op->resource[9], 0,
50312ce9	397	sizeof(struct tcx_thc), "tcx thc");
c7f439b9	398	par->bt = of_ioremap(&op->resource[8], 0,
50312ce9	399	sizeof(struct bt_regs), "tcx dac");
c7f439b9	400	info->screen_base = of_ioremap(&op->resource[0], 0,
fe3a1aa2	401	info->fix.smem_len, "tcx ram");
c7f439b9 DM	402	if (!par->tec \|\| !par->thc \|\|
	403	!par->bt \|\| !info->screen_base)
	404	goto out_unmap_regs;
	405
	406	memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
	407	if (!par->lowdepth) {
	408	par->cplane = of_ioremap(&op->resource[4], 0,
fe3a1aa2	409	info->fix.smem_len * sizeof(u32),
50312ce9	410	"tcx cplane");
c7f439b9 DM	411	if (!par->cplane)
c7f439b9 DM	412	goto out_unmap_regs;
1da177e4	413	} else {
c7f439b9 DM	414	par->mmap_map[1].size = SBUS_MMAP_EMPTY;
	415	par->mmap_map[4].size = SBUS_MMAP_EMPTY;
	416	par->mmap_map[5].size = SBUS_MMAP_EMPTY;
	417	par->mmap_map[6].size = SBUS_MMAP_EMPTY;
1da177e4 LT	418	}
1da177e4 LT	419
fe3a1aa2	420	info->fix.smem_start = op->resource[0].start;
c7f439b9	421	par->which_io = op->resource[0].flags & IORESOURCE_BITS;
50312ce9	422
1da177e4 LT	423	for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
	424	int j;
	425
	426	switch (i) {
	427	case 10:
	428	j = 12;
	429	break;
	430
	431	case 11: case 12:
	432	j = i - 1;
	433	break;
	434
	435	default:
	436	j = i;
	437	break;
cf6ac4ce	438	}
c7f439b9	439	par->mmap_map[i].poff = op->resource[j].start;
1da177e4 LT	440	}
1da177e4 LT	441
c7f439b9 DM	442	info->flags = FBINFO_DEFAULT;
c7f439b9 DM	443	info->fbops = &tcx_ops;
1da177e4 LT	444
1da177e4 LT	445	/* Initialize brooktree DAC. */
c7f439b9 DM	446	sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */
	447	sbus_writel(0xff << 24, &par->bt->control);
	448	sbus_writel(0x05 << 24, &par->bt->addr);
	449	sbus_writel(0x00 << 24, &par->bt->control);
	450	sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */
	451	sbus_writel(0x73 << 24, &par->bt->control);
	452	sbus_writel(0x07 << 24, &par->bt->addr);
	453	sbus_writel(0x00 << 24, &par->bt->control);
	454
	455	tcx_reset(info);
1da177e4	456
c7f439b9	457	tcx_blank(FB_BLANK_UNBLANK, info);
1da177e4	458
c7f439b9 DM	459	if (fb_alloc_cmap(&info->cmap, 256, 0))
	460	goto out_unmap_regs;
	461
	462	fb_set_cmap(&info->cmap, info);
	463	tcx_init_fix(info, linebytes);
	464
	465	err = register_framebuffer(info);
	466	if (err < 0)
	467	goto out_dealloc_cmap;
1da177e4	468
c7f439b9	469	dev_set_drvdata(&op->dev, info);
1da177e4	470
6d7e6533 RH	471	printk(KERN_INFO "%pOF: TCX at %lx:%lx, %s\n",
6d7e6533 RH	472	dp,
c7f439b9	473	par->which_io,
fe3a1aa2	474	info->fix.smem_start,
c7f439b9	475	par->lowdepth ? "8-bit only" : "24-bit depth");
50312ce9 DM	476
50312ce9 DM	477	return 0;
c7f439b9 DM	478
	479	out_dealloc_cmap:
	480	fb_dealloc_cmap(&info->cmap);
	481
	482	out_unmap_regs:
	483	tcx_unmap_regs(op, info, par);
6359691d	484	framebuffer_release(info);
c7f439b9 DM	485
	486	out_err:
	487	return err;
50312ce9	488	}
1da177e4	489
48c68c4f	490	static int tcx_remove(struct platform_device *op)
50312ce9	491	{
c7f439b9 DM	492	struct fb_info *info = dev_get_drvdata(&op->dev);
c7f439b9 DM	493	struct tcx_par *par = info->par;
50312ce9	494
c7f439b9 DM	495	unregister_framebuffer(info);
c7f439b9 DM	496	fb_dealloc_cmap(&info->cmap);
50312ce9	497
c7f439b9	498	tcx_unmap_regs(op, info, par);
50312ce9	499
c7f439b9	500	framebuffer_release(info);
50312ce9	501
1da177e4 LT	502	return 0;
	503	}
	504
fd098316	505	static const struct of_device_id tcx_match[] = {
50312ce9 DM	506	{
	507	.name = "SUNW,tcx",
	508	},
	509	{},
	510	};
	511	MODULE_DEVICE_TABLE(of, tcx_match);
1da177e4	512
28541d0f	513	static struct platform_driver tcx_driver = {
4018294b GL	514	.driver = {
4018294b GL	515	.name = "tcx",
4018294b GL	516	.of_match_table = tcx_match,
4018294b GL	517	},
50312ce9	518	.probe = tcx_probe,
48c68c4f	519	.remove = tcx_remove,
50312ce9	520	};
1da177e4	521
f36861d5	522	static int __init tcx_init(void)
50312ce9 DM	523	{
	524	if (fb_get_options("tcxfb", NULL))
	525	return -ENODEV;
	526
28541d0f	527	return platform_driver_register(&tcx_driver);
1da177e4 LT	528	}
1da177e4 LT	529
f36861d5	530	static void __exit tcx_exit(void)
1da177e4	531	{
28541d0f	532	platform_driver_unregister(&tcx_driver);
1da177e4 LT	533	}
	534
	535	module_init(tcx_init);
1da177e4	536	module_exit(tcx_exit);
1da177e4 LT	537
1da177e4 LT	538	MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
50312ce9 DM	539	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
50312ce9 DM	540	MODULE_VERSION("2.0");
1da177e4	541	MODULE_LICENSE("GPL");