pm2fb: mtrr support and noaccel option

index 10c0cc6..5c6ff96 100644
@@ -38,6 +38,9 @@ #include <linux/delay.h>
 #include <linux/fb.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
 
 #include <video/permedia2.h>
 #include <video/cvisionppc.h>

@@ -71,8 +74,13 @@ static char *mode __devinitdata = NULL;
  * these flags allow the user to specify that requests for +ve sync
  * should be silently turned in -ve sync.
  */
-static int lowhsync;
-static int lowvsync;
+static int lowhsync __devinitdata;
+static int lowvsync __devinitdata;
+static int noaccel __devinitdata;
+/* mtrr option */
+#ifdef CONFIG_MTRR
+static int nomtrr __devinitdata;
+#endif
 
 /*
  * The hardware state of the graphics card that isn't part of the

@@ -88,6 +96,7 @@ struct pm2fb_par
 	u32		mem_control;	/* MemControl reg at probe */
 	u32		boot_address;	/* BootAddress reg at probe */
 	u32		palette[16];
+	int		mtrr_handle;
 };
 
 /*

@@ -1316,6 +1325,15 @@ #endif
 		goto err_exit_mmio;
 	}
 
+#ifdef CONFIG_MTRR
+	default_par->mtrr_handle = -1;
+	if (!nomtrr)
+		default_par->mtrr_handle =
+			mtrr_add(pm2fb_fix.smem_start,
+				 pm2fb_fix.smem_len,
+				 MTRR_TYPE_WRCOMB, 1);
+#endif
+
 	info->fbops		= &pm2fb_ops;
 	info->fix		= pm2fb_fix;
 	info->pseudo_palette	= default_par->palette;

@@ -1324,6 +1342,11 @@ #endif
 				  FBINFO_HWACCEL_COPYAREA |
 				  FBINFO_HWACCEL_FILLRECT;
 
+	if (noaccel) {
+	    	printk(KERN_DEBUG "disabling acceleration\n");
+  		info->flags |= FBINFO_HWACCEL_DISABLED;
+	}
+
 	if (!mode)
 		mode = "640x480@60";
 

@@ -1375,6 +1398,11 @@ static void __devexit pm2fb_remove(struc
 
 	unregister_framebuffer(info);
 
+#ifdef CONFIG_MTRR
+	if (par->mtrr_handle >= 0)
+		mtrr_del(par->mtrr_handle, info->fix.smem_start,
+			 info->fix.smem_len);
+#endif /* CONFIG_MTRR */
 	iounmap(info->screen_base);
 	release_mem_region(fix->smem_start, fix->smem_len);
 	iounmap(par->v_regs);

@@ -1430,6 +1458,12 @@ static int __init pm2fb_setup(char *opti
 			lowhsync = 1;
 		} else if(!strcmp(this_opt, "lowvsync")) {
 			lowvsync = 1;
+#ifdef CONFIG_MTRR
+		} else if (!strncmp(this_opt, "nomtrr", 6)) {
+			nomtrr = 1;
+#endif
+		} else if (!strncmp(this_opt, "noaccel", 7)) {
+			noaccel = 1;
 		} else {
 			mode = this_opt;
 		}

@@ -1474,6 +1508,12 @@ module_param(lowhsync, bool, 0);
 MODULE_PARM_DESC(lowhsync, "Force horizontal sync low regardless of mode");
 module_param(lowvsync, bool, 0);
 MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless of mode");
+module_param(noaccel, bool, 0);
+MODULE_PARM_DESC(noaccel, "Disable acceleration");
+#ifdef CONFIG_MTRR
+module_param(nomtrr, bool, 0);
+MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");
+#endif
 
 MODULE_AUTHOR("Jim Hague <[email protected]>");
 MODULE_DESCRIPTION("Permedia2 framebuffer device driver");