via_utility.c

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/*
 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.

 * 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.
 */

#include <linux/via-core.h>
#include "global.h"

void viafb_get_device_support_state(u32 *support_state)
{
    *support_state = CRT_Device;

    if (viaparinfo->chip_info->tmds_chip_info.tmds_chip_name == VT1632_TMDS)
        *support_state |= DVI_Device;

    if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name == VT1631_LVDS)
        *support_state |= LCD_Device;
}

void viafb_get_device_connect_state(u32 *connect_state)
{
    bool mobile = false;

    *connect_state = CRT_Device;

    if (viafb_dvi_sense())
        *connect_state |= DVI_Device;

    viafb_lcd_get_mobile_state(&mobile);
    if (mobile)
        *connect_state |= LCD_Device;
}

bool viafb_lcd_get_support_expand_state(u32 xres, u32 yres)
{
    unsigned int support_state = 0;

    switch (viafb_lcd_panel_id) {
    case LCD_PANEL_ID0_640X480:
        if ((xres < 640) && (yres < 480))
            support_state = true;
        break;

    case LCD_PANEL_ID1_800X600:
        if ((xres < 800) && (yres < 600))
            support_state = true;
        break;

    case LCD_PANEL_ID2_1024X768:
        if ((xres < 1024) && (yres < 768))
            support_state = true;
        break;

    case LCD_PANEL_ID3_1280X768:
        if ((xres < 1280) && (yres < 768))
            support_state = true;
        break;

    case LCD_PANEL_ID4_1280X1024:
        if ((xres < 1280) && (yres < 1024))
            support_state = true;
        break;

    case LCD_PANEL_ID5_1400X1050:
        if ((xres < 1400) && (yres < 1050))
            support_state = true;
        break;

    case LCD_PANEL_ID6_1600X1200:
        if ((xres < 1600) && (yres < 1200))
            support_state = true;
        break;

    case LCD_PANEL_ID7_1366X768:
        if ((xres < 1366) && (yres < 768))
            support_state = true;
        break;

    case LCD_PANEL_ID8_1024X600:
        if ((xres < 1024) && (yres < 600))
            support_state = true;
        break;

    case LCD_PANEL_ID9_1280X800:
        if ((xres < 1280) && (yres < 800))
            support_state = true;
        break;

    case LCD_PANEL_IDA_800X480:
        if ((xres < 800) && (yres < 480))
            support_state = true;
        break;

    case LCD_PANEL_IDB_1360X768:
        if ((xres < 1360) && (yres < 768))
            support_state = true;
        break;

    case LCD_PANEL_IDC_480X640:
        if ((xres < 480) && (yres < 640))
            support_state = true;
        break;

    default:
        support_state = false;
        break;
    }

    return support_state;
}

/*====================================================================*/
/*                      Gamma Function Implementation*/
/*====================================================================*/

void viafb_set_gamma_table(int bpp, unsigned int *gamma_table)
{
    int i, sr1a;
    int active_device_amount = 0;
    int device_status = viafb_DeviceStatus;

    for (i = 0; i < sizeof(viafb_DeviceStatus) * 8; i++) {
        if (device_status & 1)
            active_device_amount++;
        device_status >>= 1;
    }

    /* 8 bpp mode can't adjust gamma */
    if (bpp == 8)
        return ;

    /* Enable Gamma */
    switch (viaparinfo->chip_info->gfx_chip_name) {
    case UNICHROME_CLE266:
    case UNICHROME_K400:
        viafb_write_reg_mask(SR16, VIASR, 0x80, BIT7);
        break;

    case UNICHROME_K800:
    case UNICHROME_PM800:
    case UNICHROME_CN700:
    case UNICHROME_CX700:
    case UNICHROME_K8M890:
    case UNICHROME_P4M890:
    case UNICHROME_P4M900:
        viafb_write_reg_mask(CR33, VIACR, 0x80, BIT7);
        break;
    }
    sr1a = (unsigned int)viafb_read_reg(VIASR, SR1A);
    viafb_write_reg_mask(SR1A, VIASR, 0x0, BIT0);

    /* Fill IGA1 Gamma Table */
    outb(0, LUT_INDEX_WRITE);
    for (i = 0; i < 256; i++) {
        outb(gamma_table[i] >> 16, LUT_DATA);
        outb(gamma_table[i] >> 8 & 0xFF, LUT_DATA);
        outb(gamma_table[i] & 0xFF, LUT_DATA);
    }

    /* If adjust Gamma value in SAMM, fill IGA1,
       IGA2 Gamma table simultaneous. */
    /* Switch to IGA2 Gamma Table */
    if ((active_device_amount > 1) &&
        !((viaparinfo->chip_info->gfx_chip_name ==
        UNICHROME_CLE266) &&
        (viaparinfo->chip_info->gfx_chip_revision < 15))) {
        viafb_write_reg_mask(SR1A, VIASR, 0x01, BIT0);
        viafb_write_reg_mask(CR6A, VIACR, 0x02, BIT1);

        /* Fill IGA2 Gamma Table */
        outb(0, LUT_INDEX_WRITE);
        for (i = 0; i < 256; i++) {
            outb(gamma_table[i] >> 16, LUT_DATA);
            outb(gamma_table[i] >> 8 & 0xFF, LUT_DATA);
            outb(gamma_table[i] & 0xFF, LUT_DATA);
        }
    }
    viafb_write_reg(SR1A, VIASR, sr1a);
}

void viafb_get_gamma_table(unsigned int *gamma_table)
{
    unsigned char color_r, color_g, color_b;
    unsigned char sr1a = 0;
    int i;

    /* Enable Gamma */
    switch (viaparinfo->chip_info->gfx_chip_name) {
    case UNICHROME_CLE266:
    case UNICHROME_K400:
        viafb_write_reg_mask(SR16, VIASR, 0x80, BIT7);
        break;

    case UNICHROME_K800:
    case UNICHROME_PM800:
    case UNICHROME_CN700:
    case UNICHROME_CX700:
    case UNICHROME_K8M890:
    case UNICHROME_P4M890:
    case UNICHROME_P4M900:
        viafb_write_reg_mask(CR33, VIACR, 0x80, BIT7);
        break;
    }
    sr1a = viafb_read_reg(VIASR, SR1A);
    viafb_write_reg_mask(SR1A, VIASR, 0x0, BIT0);

    /* Reading gamma table to get color value */
    outb(0, LUT_INDEX_READ);
    for (i = 0; i < 256; i++) {
        color_r = inb(LUT_DATA);
        color_g = inb(LUT_DATA);
        color_b = inb(LUT_DATA);
        gamma_table[i] =
            ((((u32) color_r) << 16) |
             (((u16) color_g) << 8)) | color_b;
    }
    viafb_write_reg(SR1A, VIASR, sr1a);
}

void viafb_get_gamma_support_state(int bpp, unsigned int *support_state)
{
    if (bpp == 8)
        *support_state = None_Device;
    else
        *support_state = CRT_Device | DVI_Device | LCD_Device;
}