viafb: move some modesetting functions to a seperate file

[safe/jmp/linux-2.6] / drivers / video / via / via_modesetting.c

diff --git a/drivers/video/via/via_modesetting.c b/drivers/video/via/via_modesetting.c
new file mode 100644 (file)
index 0000000..69ff285
--- /dev/null
+++ b/drivers/video/via/via_modesetting.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
+ * Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * either version 2, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * basic modesetting functions
+ */
+
+#include <linux/kernel.h>
+#include "via_modesetting.h"
+#include "via_io.h"
+#include "share.h"
+#include "debug.h"
+
+void via_set_primary_address(u32 addr)
+{
+       DEBUG_MSG(KERN_DEBUG "via_set_primary_address(0x%08X)\n", addr);
+       via_write_reg(VIACR, 0x0D, addr & 0xFF);
+       via_write_reg(VIACR, 0x0C, (addr >> 8) & 0xFF);
+       via_write_reg(VIACR, 0x34, (addr >> 16) & 0xFF);
+       via_write_reg_mask(VIACR, 0x48, (addr >> 24) & 0x1F, 0x1F);
+}
+
+void via_set_secondary_address(u32 addr)
+{
+       DEBUG_MSG(KERN_DEBUG "via_set_secondary_address(0x%08X)\n", addr);
+       /* secondary display supports only quadword aligned memory */
+       via_write_reg_mask(VIACR, 0x62, (addr >> 2) & 0xFE, 0xFE);
+       via_write_reg(VIACR, 0x63, (addr >> 10) & 0xFF);
+       via_write_reg(VIACR, 0x64, (addr >> 18) & 0xFF);
+       via_write_reg_mask(VIACR, 0xA3, (addr >> 26) & 0x07, 0x07);
+}
+
+void via_set_primary_pitch(u32 pitch)
+{
+       DEBUG_MSG(KERN_DEBUG "via_set_primary_pitch(0x%08X)\n", pitch);
+       /* spec does not say that first adapter skips 3 bits but old
+        * code did it and seems to be reasonable in analogy to 2nd adapter
+        */
+       pitch = pitch >> 3;
+       via_write_reg(VIACR, 0x13, pitch & 0xFF);
+       via_write_reg_mask(VIACR, 0x35, (pitch >> (8 - 5)) & 0xE0, 0xE0);
+}
+
+void via_set_secondary_pitch(u32 pitch)
+{
+       DEBUG_MSG(KERN_DEBUG "via_set_secondary_pitch(0x%08X)\n", pitch);
+       pitch = pitch >> 3;
+       via_write_reg(VIACR, 0x66, pitch & 0xFF);
+       via_write_reg_mask(VIACR, 0x67, (pitch >> 8) & 0x03, 0x03);
+       via_write_reg_mask(VIACR, 0x71, (pitch >> (10 - 7)) & 0x80, 0x80);
+}
+
+void via_set_primary_color_depth(u8 depth)
+{
+       u8 value;
+
+       DEBUG_MSG(KERN_DEBUG "via_set_primary_color_depth(%d)\n", depth);
+       switch (depth) {
+       case 8:
+               value = 0x00;
+               break;
+       case 15:
+               value = 0x04;
+               break;
+       case 16:
+               value = 0x14;
+               break;
+       case 24:
+               value = 0x0C;
+               break;
+       case 30:
+               value = 0x08;
+               break;
+       default:
+               printk(KERN_WARNING "via_set_primary_color_depth: "
+                       "Unsupported depth: %d\n", depth);
+               return;
+       }
+
+       via_write_reg_mask(VIASR, 0x15, value, 0x1C);
+}
+
+void via_set_secondary_color_depth(u8 depth)
+{
+       u8 value;
+
+       DEBUG_MSG(KERN_DEBUG "via_set_secondary_color_depth(%d)\n", depth);
+       switch (depth) {
+       case 8:
+               value = 0x00;
+               break;
+       case 16:
+               value = 0x40;
+               break;
+       case 24:
+               value = 0xC0;
+               break;
+       case 30:
+               value = 0x80;
+               break;
+       default:
+               printk(KERN_WARNING "via_set_secondary_color_depth: "
+                       "Unsupported depth: %d\n", depth);
+               return;
+       }
+
+       via_write_reg_mask(VIACR, 0x67, value, 0xC0);
+}