1 files changed, 541 insertions, 0 deletions

diff --git a/drivers/video/fbdev/tcx.c b/drivers/video/fbdev/tcx.c
new file mode 100644
index 000000000..34b2e5b6e
--- /dev/null
+++ b/drivers/video/fbdev/tcx.c
@@ -0,0 +1,541 @@
+// 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 const 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");