Initial import

1 files changed, 381 insertions, 0 deletions

diff --git a/drivers/video/fbdev/p9100.c b/drivers/video/fbdev/p9100.c
new file mode 100644
index 000000000..1f6ee76af
--- /dev/null
+++ b/drivers/video/fbdev/p9100.c
@@ -0,0 +1,381 @@
+/* p9100.c: P9100 frame buffer driver
+ *
+ * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
+ * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
+ *
+ * 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 p9100_setcolreg(unsigned, unsigned, unsigned, unsigned,
+			   unsigned, struct fb_info *);
+static int p9100_blank(int, struct fb_info *);
+
+static int p9100_mmap(struct fb_info *, struct vm_area_struct *);
+static int p9100_ioctl(struct fb_info *, unsigned int, unsigned long);
+
+/*
+ *  Frame buffer operations
+ */
+
+static struct fb_ops p9100_ops = {
+	.owner			= THIS_MODULE,
+	.fb_setcolreg		= p9100_setcolreg,
+	.fb_blank		= p9100_blank,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+	.fb_mmap		= p9100_mmap,
+	.fb_ioctl		= p9100_ioctl,
+#ifdef CONFIG_COMPAT
+	.fb_compat_ioctl	= sbusfb_compat_ioctl,
+#endif
+};
+
+/* P9100 control registers */
+#define P9100_SYSCTL_OFF	0x0UL
+#define P9100_VIDEOCTL_OFF	0x100UL
+#define P9100_VRAMCTL_OFF 	0x180UL
+#define P9100_RAMDAC_OFF 	0x200UL
+#define P9100_VIDEOCOPROC_OFF 	0x400UL
+
+/* P9100 command registers */
+#define P9100_CMD_OFF 0x0UL
+
+/* P9100 framebuffer memory */
+#define P9100_FB_OFF 0x0UL
+
+/* 3 bits: 2=8bpp 3=16bpp 5=32bpp 7=24bpp */
+#define SYS_CONFIG_PIXELSIZE_SHIFT 26 
+
+#define SCREENPAINT_TIMECTL1_ENABLE_VIDEO 0x20 /* 0 = off, 1 = on */
+
+struct p9100_regs {
+	/* Registers for the system control */
+	u32 sys_base;
+	u32 sys_config;
+	u32 sys_intr;
+	u32 sys_int_ena;
+	u32 sys_alt_rd;
+	u32 sys_alt_wr;
+	u32 sys_xxx[58];
+
+	/* Registers for the video control */
+	u32 vid_base;
+	u32 vid_hcnt;
+	u32 vid_htotal;
+	u32 vid_hsync_rise;
+	u32 vid_hblank_rise;
+	u32 vid_hblank_fall;
+	u32 vid_hcnt_preload;
+	u32 vid_vcnt;
+	u32 vid_vlen;
+	u32 vid_vsync_rise;
+	u32 vid_vblank_rise;
+	u32 vid_vblank_fall;
+	u32 vid_vcnt_preload;
+	u32 vid_screenpaint_addr;
+	u32 vid_screenpaint_timectl1;
+	u32 vid_screenpaint_qsfcnt;
+	u32 vid_screenpaint_timectl2;
+	u32 vid_xxx[15];
+
+	/* Registers for the video control */
+	u32 vram_base;
+	u32 vram_memcfg;
+	u32 vram_refresh_pd;
+	u32 vram_refresh_cnt;
+	u32 vram_raslo_max;
+	u32 vram_raslo_cur;
+	u32 pwrup_cfg;
+	u32 vram_xxx[25];
+
+	/* Registers for IBM RGB528 Palette */
+	u32 ramdac_cmap_wridx; 
+	u32 ramdac_palette_data;
+	u32 ramdac_pixel_mask;
+	u32 ramdac_palette_rdaddr;
+	u32 ramdac_idx_lo;
+	u32 ramdac_idx_hi;
+	u32 ramdac_idx_data;
+	u32 ramdac_idx_ctl;
+	u32 ramdac_xxx[1784];
+};
+
+struct p9100_cmd_parameng {
+	u32 parameng_status;
+	u32 parameng_bltcmd;
+	u32 parameng_quadcmd;
+};
+
+struct p9100_par {
+	spinlock_t		lock;
+	struct p9100_regs	__iomem *regs;
+
+	u32			flags;
+#define P9100_FLAG_BLANKED	0x00000001
+
+	unsigned long		which_io;
+};
+
+/**
+ *      p9100_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 p9100_setcolreg(unsigned regno,
+			   unsigned red, unsigned green, unsigned blue,
+			   unsigned transp, struct fb_info *info)
+{
+	struct p9100_par *par = (struct p9100_par *) info->par;
+	struct p9100_regs __iomem *regs = par->regs;
+	unsigned long flags;
+
+	if (regno >= 256)
+		return 1;
+
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	sbus_writel((regno << 16), &regs->ramdac_cmap_wridx);
+	sbus_writel((red << 16), &regs->ramdac_palette_data);
+	sbus_writel((green << 16), &regs->ramdac_palette_data);
+	sbus_writel((blue << 16), &regs->ramdac_palette_data);
+
+	spin_unlock_irqrestore(&par->lock, flags);
+
+	return 0;
+}
+
+/**
+ *      p9100_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
+p9100_blank(int blank, struct fb_info *info)
+{
+	struct p9100_par *par = (struct p9100_par *) info->par;
+	struct p9100_regs __iomem *regs = par->regs;
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&par->lock, flags);
+
+	switch (blank) {
+	case FB_BLANK_UNBLANK: /* Unblanking */
+		val = sbus_readl(&regs->vid_screenpaint_timectl1);
+		val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
+		sbus_writel(val, &regs->vid_screenpaint_timectl1);
+		par->flags &= ~P9100_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_readl(&regs->vid_screenpaint_timectl1);
+		val &= ~SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
+		sbus_writel(val, &regs->vid_screenpaint_timectl1);
+		par->flags |= P9100_FLAG_BLANKED;
+		break;
+	}
+
+	spin_unlock_irqrestore(&par->lock, flags);
+
+	return 0;
+}
+
+static struct sbus_mmap_map p9100_mmap_map[] = {
+	{ CG3_MMAP_OFFSET,	0,		SBUS_MMAP_FBSIZE(1) },
+	{ 0,			0,		0		    }
+};
+
+static int p9100_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct p9100_par *par = (struct p9100_par *)info->par;
+
+	return sbusfb_mmap_helper(p9100_mmap_map,
+				  info->fix.smem_start, info->fix.smem_len,
+				  par->which_io, vma);
+}
+
+static int p9100_ioctl(struct fb_info *info, unsigned int cmd,
+		       unsigned long arg)
+{
+	/* Make it look like a cg3. */
+	return sbusfb_ioctl_helper(cmd, arg, info,
+				   FBTYPE_SUN3COLOR, 8, info->fix.smem_len);
+}
+
+/*
+ *  Initialisation
+ */
+
+static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_node *dp)
+{
+	strlcpy(info->fix.id, dp->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 int p9100_probe(struct platform_device *op)
+{
+	struct device_node *dp = op->dev.of_node;
+	struct fb_info *info;
+	struct p9100_par *par;
+	int linebytes, err;
+
+	info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);
+
+	err = -ENOMEM;
+	if (!info)
+		goto out_err;
+	par = info->par;
+
+	spin_lock_init(&par->lock);
+
+	/* This is the framebuffer and the only resource apps can mmap.  */
+	info->fix.smem_start = op->resource[2].start;
+	par->which_io = op->resource[2].flags & IORESOURCE_BITS;
+
+	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->regs = of_ioremap(&op->resource[0], 0,
+			       sizeof(struct p9100_regs), "p9100 regs");
+	if (!par->regs)
+		goto out_release_fb;
+
+	info->flags = FBINFO_DEFAULT;
+	info->fbops = &p9100_ops;
+	info->screen_base = of_ioremap(&op->resource[2], 0,
+				       info->fix.smem_len, "p9100 ram");
+	if (!info->screen_base)
+		goto out_unmap_regs;
+
+	p9100_blank(FB_BLANK_UNBLANK, info);
+
+	if (fb_alloc_cmap(&info->cmap, 256, 0))
+		goto out_unmap_screen;
+
+	p9100_init_fix(info, linebytes, dp);
+
+	err = register_framebuffer(info);
+	if (err < 0)
+		goto out_dealloc_cmap;
+
+	fb_set_cmap(&info->cmap, info);
+
+	dev_set_drvdata(&op->dev, info);
+
+	printk(KERN_INFO "%s: p9100 at %lx:%lx\n",
+	       dp->full_name,
+	       par->which_io, info->fix.smem_start);
+
+	return 0;
+
+out_dealloc_cmap:
+	fb_dealloc_cmap(&info->cmap);
+
+out_unmap_screen:
+	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);
+
+out_unmap_regs:
+	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
+
+out_release_fb:
+	framebuffer_release(info);
+
+out_err:
+	return err;
+}
+
+static int p9100_remove(struct platform_device *op)
+{
+	struct fb_info *info = dev_get_drvdata(&op->dev);
+	struct p9100_par *par = info->par;
+
+	unregister_framebuffer(info);
+	fb_dealloc_cmap(&info->cmap);
+
+	of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
+	of_iounmap(&op->resource[2], info->screen_base, info->fix.smem_len);
+
+	framebuffer_release(info);
+
+	return 0;
+}
+
+static const struct of_device_id p9100_match[] = {
+	{
+		.name = "p9100",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, p9100_match);
+
+static struct platform_driver p9100_driver = {
+	.driver = {
+		.name = "p9100",
+		.of_match_table = p9100_match,
+	},
+	.probe		= p9100_probe,
+	.remove		= p9100_remove,
+};
+
+static int __init p9100_init(void)
+{
+	if (fb_get_options("p9100fb", NULL))
+		return -ENODEV;
+
+	return platform_driver_register(&p9100_driver);
+}
+
+static void __exit p9100_exit(void)
+{
+	platform_driver_unregister(&p9100_driver);
+}
+
+module_init(p9100_init);
+module_exit(p9100_exit);
+
+MODULE_DESCRIPTION("framebuffer driver for P9100 chipsets");
+MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");