diff options
Diffstat (limited to 'drivers/video/via/via_modesetting.c')
| -rw-r--r-- | drivers/video/via/via_modesetting.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/video/via/via_modesetting.c b/drivers/video/via/via_modesetting.c new file mode 100644 index 00000000000..3cddcff88ab --- /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 <linux/via-core.h> +#include "via_modesetting.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); +} |