cg6: disable cursor when leaving graphics mode

On sparc32 debian etch, the cursor is not disabled
when leaving X windows.  This patch disables the
cursor when leaving graphics mode just like the
ffb driver.

Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 35 insertions, 1 deletions

diff --git a/drivers/video/cg6.c b/drivers/video/cg6.c
index 9eaa63ab08fa..940ec04f0f1b 100644
--- a/drivers/video/cg6.c
+++ b/drivers/video/cg6.c
@@ -34,10 +34,11 @@ static int cg6_blank(int, struct fb_info *);
 
 static void cg6_imageblit(struct fb_info *, const struct fb_image *);
 static void cg6_fillrect(struct fb_info *, const struct fb_fillrect *);
+static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 static int cg6_sync(struct fb_info *);
 static int cg6_mmap(struct fb_info *, struct vm_area_struct *);
 static int cg6_ioctl(struct fb_info *, unsigned int, unsigned long);
-static void cg6_copyarea(struct fb_info *info, const struct fb_copyarea *area);
+static int cg6_pan_display(struct fb_var_screeninfo *, struct fb_info *);
 
 /*
  *  Frame buffer operations
@@ -47,6 +48,7 @@ static struct fb_ops cg6_ops = {
         .owner                  = THIS_MODULE,
         .fb_setcolreg           = cg6_setcolreg,
         .fb_blank               = cg6_blank,
+        .fb_pan_display         = cg6_pan_display,
         .fb_fillrect            = cg6_fillrect,
         .fb_copyarea            = cg6_copyarea,
         .fb_imageblit           = cg6_imageblit,
@@ -161,6 +163,7 @@ static struct fb_ops cg6_ops = {
 #define CG6_THC_MISC_INT_ENAB           (1 << 5)
 #define CG6_THC_MISC_INT                (1 << 4)
 #define CG6_THC_MISC_INIT               0x9f
+#define CG6_THC_CURSOFF                 ((65536-32) | ((65536-32) << 16))
 
 /* The contents are unknown */
 struct cg6_tec {
@@ -280,6 +283,33 @@ static int cg6_sync(struct fb_info *info)
         return 0;
 }
 
+static void cg6_switch_from_graph(struct cg6_par *par)
+{
+        struct cg6_thc __iomem *thc = par->thc;
+        unsigned long flags;
+
+        spin_lock_irqsave(&par->lock, flags);
+
+        /* Hide the cursor. */
+        sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
+
+        spin_unlock_irqrestore(&par->lock, flags);
+}
+
+static int cg6_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+        struct cg6_par *par = (struct cg6_par *)info->par;
+
+        /* We just use this to catch switches out of
+         * graphics mode.
+         */
+        cg6_switch_from_graph(par);
+
+        if (var->xoffset || var->yoffset || var->vmode)
+                return -EINVAL;
+        return 0;
+}
+
 /**
  *      cg6_fillrect -  Draws a rectangle on the screen.
  *
@@ -643,9 +673,13 @@ static void __devinit cg6_chip_init(struct fb_info *info)
         struct cg6_par *par = (struct cg6_par *)info->par;
         struct cg6_tec __iomem *tec = par->tec;
         struct cg6_fbc __iomem *fbc = par->fbc;
+        struct cg6_thc __iomem *thc = par->thc;
         u32 rev, conf, mode;
         int i;
 
+        /* Hide the cursor. */
+        sbus_writel(CG6_THC_CURSOFF, &thc->thc_cursxy);
+
         /* Turn off stuff in the Transform Engine. */
         sbus_writel(0, &tec->tec_matrix);
         sbus_writel(0, &tec->tec_clip);