text: /*
   * 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;
  }
  