Initial import

1 files changed, 405 insertions, 0 deletions

diff --git a/drivers/video/fbdev/bw2.c b/drivers/video/fbdev/bw2.c
new file mode 100644
index 000000000..8c5b281f0
--- /dev/null
+++ b/drivers/video/fbdev/bw2.c
@@ -0,0 +1,405 @@
+/* bw2.c: BWTWO frame buffer driver
+ *
+ * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
+ *
+ * Driver layout based loosely on tgafb.c, see that file for credits.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/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 bw2_blank(int, struct fb_info *);
+
+static int bw2_mmap(struct fb_info *, struct vm_area_struct *);
+static int bw2_ioctl(struct fb_info *, unsigned int, unsigned long);
+
+/*
+ *  Frame buffer operations
+ */
+
+static struct fb_ops bw2_ops = {
+	.owner			= THIS_MODULE,
+	.fb_blank		= bw2_blank,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+	.fb_mmap		= bw2_mmap,
+	.fb_ioctl		= bw2_ioctl,
+#ifdef CONFIG_COMPAT
+	.fb_compat_ioctl	= sbusfb_compat_ioctl,
+#endif
+};
+
+/* OBio addresses for the bwtwo registers */
+#define BWTWO_REGISTER_OFFSET 0x400000
+
+struct bt_regs {
+	u32 addr;
+	u32 color_map;
+	u32 control;
+	u32 cursor;
+};
+
+struct bw2_regs {
+	struct bt_regs	cmap;
+	u8	control;
+	u8	status;
+	u8	cursor_start;
+	u8	cursor_end;
+	u8	h_blank_start;
+	u8	h_blank_end;
+	u8	h_sync_start;
+	u8	h_sync_end;
+	u8	comp_sync_end;
+	u8	v_blank_start_high;
+	u8	v_blank_start_low;
+	u8	v_blank_end;
+	u8	v_sync_start;
+	u8	v_sync_end;
+	u8	xfer_holdoff_start;
+	u8	xfer_holdoff_end;
+};
+
+/* Status Register Constants */
+#define BWTWO_SR_RES_MASK	0x70
+#define BWTWO_SR_1600_1280	0x50
+#define BWTWO_SR_1152_900_76_A	0x40
+#define BWTWO_SR_1152_900_76_B	0x60
+#define BWTWO_SR_ID_MASK	0x0f
+#define BWTWO_SR_ID_MONO	0x02
+#define BWTWO_SR_ID_MONO_ECL	0x03
+#define BWTWO_SR_ID_MSYNC	0x04
+#define BWTWO_SR_ID_NOCONN	0x0a
+
+/* Control Register Constants */
+#define BWTWO_CTL_ENABLE_INTS   0x80
+#define BWTWO_CTL_ENABLE_VIDEO  0x40
+#define BWTWO_CTL_ENABLE_TIMING 0x20
+#define BWTWO_CTL_ENABLE_CURCMP 0x10
+#define BWTWO_CTL_XTAL_MASK     0x0C
+#define BWTWO_CTL_DIVISOR_MASK  0x03
+
+/* Status Register Constants */
+#define BWTWO_STAT_PENDING_INT  0x80
+#define BWTWO_STAT_MSENSE_MASK  0x70
+#define BWTWO_STAT_ID_MASK      0x0f
+
+struct bw2_par {
+	spinlock_t		lock;
+	struct bw2_regs		__iomem *regs;
+
+	u32			flags;
+#define BW2_FLAG_BLANKED	0x00000001
+
+	unsigned long		which_io;
+};
+
+/**
+ *      bw2_blank - Optional function.  Blanks the display.
+ *      @blank_mode: the blank mode we want.
+ *      @info: frame buffer structure that represents a single frame buffer
+ */
+static int
+bw2_blank(int blank, struct fb_info *info)
+{
+	struct bw2_par *par = (struct bw2_par *) info->par;
+	struct bw2_regs __iomem *regs = par->regs;
+	unsigned long flags;
+	u8 val;
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	switch (blank) {
+	case FB_BLANK_UNBLANK: /* Unblanking */
+		val = sbus_readb(&regs->control);
+		val |= BWTWO_CTL_ENABLE_VIDEO;
+		sbus_writeb(val, &regs->control);
+		par->flags &= ~BW2_FLAG_BLANKED;
+		break;
+
+	case FB_BLANK_NORMAL: /* Normal blanking */
+	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
+	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
+	case FB_BLANK_POWERDOWN: /* Poweroff */
+		val = sbus_readb(&regs->control);
+		val &= ~BWTWO_CTL_ENABLE_VIDEO;
+		sbus_writeb(val, &regs->control);
+		par->flags |= BW2_FLAG_BLANKED;
+		break;
+	}
+
+	spin_unlock_irqrestore(&par->lock, flags);
+
+	return 0;
+}
+
+static struct sbus_mmap_map bw2_mmap_map[] = {
+	{
+		.size = SBUS_MMAP_FBSIZE(1)
+	},
+	{ .size = 0 }
+};
+
+static int bw2_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct bw2_par *par = (struct bw2_par *)info->par;
+
+	return sbusfb_mmap_helper(bw2_mmap_map,
+				  info->fix.smem_start, info->fix.smem_len,
+				  par->which_io,
+				  vma);
+}
+
+static int bw2_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+	return sbusfb_ioctl_helper(cmd, arg, info,
+				   FBTYPE_SUN2BW, 1, info->fix.smem_len);
+}
+
+/*
+ *  Initialisation
+ */
+
+static void bw2_init_fix(struct fb_info *info, int linebytes)
+{
+	strlcpy(info->fix.id, "bwtwo", sizeof(info->fix.id));
+
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = FB_VISUAL_MONO01;
+
+	info->fix.line_length = linebytes;
+
+	info->fix.accel = FB_ACCEL_SUN_BWTWO;
+}
+
+static u8 bw2regs_1600[] = {
+	0x14, 0x8b,	0x15, 0x28,	0x16, 0x03,	0x17, 0x13,
+	0x18, 0x7b,	0x19, 0x05,	0x1a, 0x34,	0x1b, 0x2e,
+	0x1c, 0x00,	0x1d, 0x0a,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x21,	0
+};
+
+static u8 bw2regs_ecl[] = {
+	0x14, 0x65,	0x15, 0x1e,	0x16, 0x04,	0x17, 0x0c,
+	0x18, 0x5e,	0x19, 0x03,	0x1a, 0xa7,	0x1b, 0x23,
+	0x1c, 0x00,	0x1d, 0x08,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x20,	0
+};
+
+static u8 bw2regs_analog[] = {
+	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x03,	0x17, 0x13,
+	0x18, 0xb0,	0x19, 0x03,	0x1a, 0xa6,	0x1b, 0x22,
+	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x20,	0
+};
+
+static u8 bw2regs_76hz[] = {
+	0x14, 0xb7,	0x15, 0x27,	0x16, 0x03,	0x17, 0x0f,
+	0x18, 0xae,	0x19, 0x03,	0x1a, 0xae,	0x1b, 0x2a,
+	0x1c, 0x01,	0x1d, 0x09,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x24,	0
+};
+
+static u8 bw2regs_66hz[] = {
+	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 int bw2_do_default_mode(struct bw2_par *par, struct fb_info *info,
+			       int *linebytes)
+{
+	u8 status, mon;
+	u8 *p;
+
+	status = sbus_readb(&par->regs->status);
+	mon = status & BWTWO_SR_RES_MASK;
+	switch (status & BWTWO_SR_ID_MASK) {
+	case BWTWO_SR_ID_MONO_ECL:
+		if (mon == BWTWO_SR_1600_1280) {
+			p = bw2regs_1600;
+			info->var.xres = info->var.xres_virtual = 1600;
+			info->var.yres = info->var.yres_virtual = 1280;
+			*linebytes = 1600 / 8;
+		} else
+			p = bw2regs_ecl;
+		break;
+
+	case BWTWO_SR_ID_MONO:
+		p = bw2regs_analog;
+		break;
+
+	case BWTWO_SR_ID_MSYNC:
+		if (mon == BWTWO_SR_1152_900_76_A ||
+		    mon == BWTWO_SR_1152_900_76_B)
+			p = bw2regs_76hz;
+		else
+			p = bw2regs_66hz;
+		break;
+
+	case BWTWO_SR_ID_NOCONN:
+		return 0;
+
+	default:
+		printk(KERN_ERR "bw2: can't handle SR %02x\n",
+		       status);
+		return -EINVAL;
+	}
+	for ( ; *p; p += 2) {
+		u8 __iomem *regp = &((u8 __iomem *)par->regs)[p[0]];
+		sbus_writeb(p[1], regp);
+	}
+	return 0;
+}
+
+static int bw2_probe(struct platform_device *op)
+{
+	struct device_node *dp = op->dev.of_node;
+	struct fb_info *info;
+	struct bw2_par *par;
+	int linebytes, err;
+
+	info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);
+
+	err = -ENOMEM;
+	if (!info)
+		goto out_err;
+	par = info->par;
+
+	spin_lock_init(&par->lock);
+
+	info->fix.smem_start = op->resource[0].start;
+	par->which_io = op->resource[0].flags & IORESOURCE_BITS;
+
+	sbusfb_fill_var(&info->var, dp, 1);
+	linebytes = of_getintprop_default(dp, "linebytes",
+					  info->var.xres);
+
+	info->var.red.length = info->var.green.length =
+		info->var.blue.length = info->var.bits_per_pixel;
+	info->var.red.offset = info->var.green.offset =
+		info->var.blue.offset = 0;
+
+	par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
+			       sizeof(struct bw2_regs), "bw2 regs");
+	if (!par->regs)
+		goto out_release_fb;
+
+	if (!of_find_property(dp, "width", NULL)) {
+		err = bw2_do_default_mode(par, info, &linebytes);
+		if (err)
+			goto out_unmap_regs;
+	}
+
+	info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
+
+	info->flags = FBINFO_DEFAULT;
+	info->fbops = &bw2_ops;
+
+	info->screen_base = of_ioremap(&op->resource[0], 0,
+				       info->fix.smem_len, "bw2 ram");
+	if (!info->screen_base) {
+		err = -ENOMEM;
+		goto out_unmap_regs;
+	}
+
+	bw2_blank(FB_BLANK_UNBLANK, info);
+
+	bw2_init_fix(info, linebytes);
+
+	err = register_framebuffer(info);
+	if (err < 0)
+		goto out_unmap_screen;
+
+	dev_set_drvdata(&op->dev, info);
+
+	printk(KERN_INFO "%s: bwtwo at %lx:%lx\n",
+	       dp->full_name, par->which_io, info->fix.smem_start);
+
+	return 0;
+
+out_unmap_screen:
+	of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
+
+out_unmap_regs:
+	of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
+
+out_release_fb:
+	framebuffer_release(info);
+
+out_err:
+	return err;
+}
+
+static int bw2_remove(struct platform_device *op)
+{
+	struct fb_info *info = dev_get_drvdata(&op->dev);
+	struct bw2_par *par = info->par;
+
+	unregister_framebuffer(info);
+
+	of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
+	of_iounmap(&op->resource[0], info->screen_base, info->fix.smem_len);
+
+	framebuffer_release(info);
+
+	return 0;
+}
+
+static const struct of_device_id bw2_match[] = {
+	{
+		.name = "bwtwo",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, bw2_match);
+
+static struct platform_driver bw2_driver = {
+	.driver = {
+		.name = "bw2",
+		.of_match_table = bw2_match,
+	},
+	.probe		= bw2_probe,
+	.remove		= bw2_remove,
+};
+
+static int __init bw2_init(void)
+{
+	if (fb_get_options("bw2fb", NULL))
+		return -ENODEV;
+
+	return platform_driver_register(&bw2_driver);
+}
+
+static void __exit bw2_exit(void)
+{
+	platform_driver_unregister(&bw2_driver);
+}
+
+module_init(bw2_init);
+module_exit(bw2_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for BWTWO chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");