[PATCH] pxafb: Add option to enable/disable the cursor

[Rodolfo Giometti]

Add cursor enable/disable, very useful if you wish a full screen boot
logo.
    
Cursor can be disabled from kernel command line:
    
   video=pxafb:nocursor
    
or from sysfs interface:
    
   echo 1 > /sys/module/pxafb/parameters/nocursor
    
Signed-off-by: Rodolfo Giometti <[EMAIL PROTECTED]>

diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index b4947c8..5d33501 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -9,6 +9,8 @@
  *  which in turn is
  *   Based on acornfb.c Copyright (C) Russell King.
  *
+ * Cursor enable/disable by Rodolfo Giometti <[EMAIL PROTECTED]>
+ *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file COPYING in the main directory of this archive for
  * more details.
@@ -54,6 +56,10 @@
 
 #include "pxafb.h"
 
+static int nocursor = 0;
+module_param(nocursor, int, 0644);
+MODULE_PARM_DESC(nocursor, "cursor enable/disable");
+
 /* Bits which should not be set in machine configuration structures */
 #define LCCR0_INVALID_CONFIG_MASK 
(LCCR0_OUM|LCCR0_BM|LCCR0_QDM|LCCR0_DIS|LCCR0_EFM|LCCR0_IUM|LCCR0_SFM|LCCR0_LDM|LCCR0_ENB)
 #define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP|LCCR3_VSP|LCCR3_PCD|LCCR3_BPP)
@@ -464,6 +470,17 @@ static int pxafb_mmap(struct fb_info *info,
        return -EINVAL;
 }
 
+/* fb_cursor
+ * Used to disable cursor drawing...
+ */
+int pxafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+       if (nocursor)
+               return 0;
+       else
+               return -EINVAL; /* just to force soft_cursor() call */
+}
+
 static struct fb_ops pxafb_ops = {
        .owner          = THIS_MODULE,
        .fb_check_var   = pxafb_check_var,
@@ -474,6 +491,7 @@ static struct fb_ops pxafb_ops = {
        .fb_imageblit   = cfb_imageblit,
        .fb_blank       = pxafb_blank,
        .fb_mmap        = pxafb_mmap,
+       .fb_cursor      = pxafb_cursor,
 };
 
 /*
@@ -1308,6 +1326,9 @@ static int __init pxafb_parse_options(struct device *dev, 
char *options)
                        inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono;
                 } else if (!strncmp(this_opt, "8pix", 4)) {
                        inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono;
+               } else if (!strncmp(this_opt, "nocursor", 8)) {
+                       nocursor = 1;
+                       dev_info(dev, "cursor disabled");
                } else {
                        dev_err(dev, "unknown option: %s\n", this_opt);
                        return -EINVAL;