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