drivers/video/fbdev/via/lcd.c

   1 /*
   2  * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   4
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public
   7  * License as published by the Free Software Foundation;
   8  * either version 2, or (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
  12  * the implied warranty of MERCHANTABILITY or FITNESS FOR
  13  * A PARTICULAR PURPOSE.See the GNU General Public License
  14  * for more details.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc.,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21 #include <linux/via-core.h>
  22 #include <linux/via_i2c.h>
  23 #include "global.h"
  24
  25 #define viafb_compact_res(x, y) (((x)<<16)|(y))
  26
  27 /* CLE266 Software Power Sequence */
  28 /* {Mask}, {Data}, {Delay} */
  29 static const int PowerSequenceOn[3][3] = {
  30         {0x10, 0x08, 0x06}, {0x10, 0x08, 0x06}, {0x19, 0x1FE, 0x01}
  31 };
  32 static const int PowerSequenceOff[3][3] = {
  33         {0x06, 0x08, 0x10}, {0x00, 0x00, 0x00}, {0xD2, 0x19, 0x01}
  34 };
  35
  36 static struct _lcd_scaling_factor lcd_scaling_factor = {
  37         /* LCD Horizontal Scaling Factor Register */
  38         {LCD_HOR_SCALING_FACTOR_REG_NUM,
  39          {{CR9F, 0, 1}, {CR77, 0, 7}, {CR79, 4, 5} } },
  40         /* LCD Vertical Scaling Factor Register */
  41         {LCD_VER_SCALING_FACTOR_REG_NUM,
  42          {{CR79, 3, 3}, {CR78, 0, 7}, {CR79, 6, 7} } }
  43 };
  44 static struct _lcd_scaling_factor lcd_scaling_factor_CLE = {
  45         /* LCD Horizontal Scaling Factor Register */
  46         {LCD_HOR_SCALING_FACTOR_REG_NUM_CLE, {{CR77, 0, 7}, {CR79, 4, 5} } },
  47         /* LCD Vertical Scaling Factor Register */
  48         {LCD_VER_SCALING_FACTOR_REG_NUM_CLE, {{CR78, 0, 7}, {CR79, 6, 7} } }
  49 };
  50
  51 static bool lvds_identify_integratedlvds(void);
  52 static void fp_id_to_vindex(int panel_id);
  53 static int lvds_register_read(int index);
  54 static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
  55                       int panel_vres);
  56 static void lcd_patch_skew_dvp0(struct lvds_setting_information
  57                          *plvds_setting_info,
  58                          struct lvds_chip_information *plvds_chip_info);
  59 static void lcd_patch_skew_dvp1(struct lvds_setting_information
  60                          *plvds_setting_info,
  61                          struct lvds_chip_information *plvds_chip_info);
  62 static void lcd_patch_skew(struct lvds_setting_information
  63         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info);
  64
  65 static void integrated_lvds_disable(struct lvds_setting_information
  66                              *plvds_setting_info,
  67                              struct lvds_chip_information *plvds_chip_info);
  68 static void integrated_lvds_enable(struct lvds_setting_information
  69                             *plvds_setting_info,
  70                             struct lvds_chip_information *plvds_chip_info);
  71 static void lcd_powersequence_off(void);
  72 static void lcd_powersequence_on(void);
  73 static void fill_lcd_format(void);
  74 static void check_diport_of_integrated_lvds(
  75         struct lvds_chip_information *plvds_chip_info,
  76                                      struct lvds_setting_information
  77                                      *plvds_setting_info);
  78
  79 static inline bool check_lvds_chip(int device_id_subaddr, int device_id)
  80 {
  81         return lvds_register_read(device_id_subaddr) == device_id;
  82 }
  83
  84 void viafb_init_lcd_size(void)
  85 {
  86         DEBUG_MSG(KERN_INFO "viafb_init_lcd_size()\n");
  87
  88         fp_id_to_vindex(viafb_lcd_panel_id);
  89         viaparinfo->lvds_setting_info2->lcd_panel_hres =
  90                 viaparinfo->lvds_setting_info->lcd_panel_hres;
  91         viaparinfo->lvds_setting_info2->lcd_panel_vres =
  92                 viaparinfo->lvds_setting_info->lcd_panel_vres;
  93         viaparinfo->lvds_setting_info2->device_lcd_dualedge =
  94             viaparinfo->lvds_setting_info->device_lcd_dualedge;
  95         viaparinfo->lvds_setting_info2->LCDDithering =
  96                 viaparinfo->lvds_setting_info->LCDDithering;
  97 }
  98
  99 static bool lvds_identify_integratedlvds(void)
 100 {
 101         if (viafb_display_hardware_layout == HW_LAYOUT_LCD_EXTERNAL_LCD2) {
 102                 /* Two dual channel LCD (Internal LVDS + External LVDS): */
 103                 /* If we have an external LVDS, such as VT1636, we should
 104                    have its chip ID already. */
 105                 if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 106                         viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
 107                             INTEGRATED_LVDS;
 108                         DEBUG_MSG(KERN_INFO "Support two dual channel LVDS! "
 109                                   "(Internal LVDS + External LVDS)\n");
 110                 } else {
 111                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 112                             INTEGRATED_LVDS;
 113                         DEBUG_MSG(KERN_INFO "Not found external LVDS, "
 114                                   "so can't support two dual channel LVDS!\n");
 115                 }
 116         } else if (viafb_display_hardware_layout == HW_LAYOUT_LCD1_LCD2) {
 117                 /* Two single channel LCD (Internal LVDS + Internal LVDS): */
 118                 viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 119                 INTEGRATED_LVDS;
 120                 viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
 121                         INTEGRATED_LVDS;
 122                 DEBUG_MSG(KERN_INFO "Support two single channel LVDS! "
 123                           "(Internal LVDS + Internal LVDS)\n");
 124         } else if (viafb_display_hardware_layout != HW_LAYOUT_DVI_ONLY) {
 125                 /* If we have found external LVDS, just use it,
 126                    otherwise, we will use internal LVDS as default. */
 127                 if (!viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 128                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 129                             INTEGRATED_LVDS;
 130                         DEBUG_MSG(KERN_INFO "Found Integrated LVDS!\n");
 131                 }
 132         } else {
 133                 viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 134                         NON_LVDS_TRANSMITTER;
 135                 DEBUG_MSG(KERN_INFO "Do not support LVDS!\n");
 136                 return false;
 137         }
 138
 139         return true;
 140 }
 141
 142 bool viafb_lvds_trasmitter_identify(void)
 143 {
 144         if (viafb_lvds_identify_vt1636(VIA_PORT_31)) {
 145                 viaparinfo->chip_info->lvds_chip_info.i2c_port = VIA_PORT_31;
 146                 DEBUG_MSG(KERN_INFO
 147                           "Found VIA VT1636 LVDS on port i2c 0x31\n");
 148         } else {
 149                 if (viafb_lvds_identify_vt1636(VIA_PORT_2C)) {
 150                         viaparinfo->chip_info->lvds_chip_info.i2c_port =
 151                                 VIA_PORT_2C;
 152                         DEBUG_MSG(KERN_INFO
 153                                   "Found VIA VT1636 LVDS on port gpio 0x2c\n");
 154                 }
 155         }
 156
 157         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700)
 158                 lvds_identify_integratedlvds();
 159
 160         if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
 161                 return true;
 162         /* Check for VT1631: */
 163         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name = VT1631_LVDS;
 164         viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 165                 VT1631_LVDS_I2C_ADDR;
 166
 167         if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID)) {
 168                 DEBUG_MSG(KERN_INFO "\n VT1631 LVDS ! \n");
 169                 DEBUG_MSG(KERN_INFO "\n %2d",
 170                           viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
 171                 DEBUG_MSG(KERN_INFO "\n %2d",
 172                           viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
 173                 return true;
 174         }
 175
 176         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 177                 NON_LVDS_TRANSMITTER;
 178         viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 179                 VT1631_LVDS_I2C_ADDR;
 180         return false;
 181 }
 182
 183 static void fp_id_to_vindex(int panel_id)
 184 {
 185         DEBUG_MSG(KERN_INFO "fp_get_panel_id()\n");
 186
 187         if (panel_id > LCD_PANEL_ID_MAXIMUM)
 188                 viafb_lcd_panel_id = panel_id =
 189                 viafb_read_reg(VIACR, CR3F) & 0x0F;
 190
 191         switch (panel_id) {
 192         case 0x0:
 193                 viaparinfo->lvds_setting_info->lcd_panel_hres = 640;
 194                 viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
 195                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 196                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 197                 break;
 198         case 0x1:
 199                 viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
 200                 viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
 201                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 202                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 203                 break;
 204         case 0x2:
 205                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 206                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 207                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 208                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 209                 break;
 210         case 0x3:
 211                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 212                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 213                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 214                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 215                 break;
 216         case 0x4:
 217                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 218                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
 219                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 220                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 221                 break;
 222         case 0x5:
 223                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
 224                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
 225                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 226                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 227                 break;
 228         case 0x6:
 229                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
 230                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
 231                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 232                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 233                 break;
 234         case 0x8:
 235                 viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
 236                 viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
 237                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 238                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 239                 break;
 240         case 0x9:
 241                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 242                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 243                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 244                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 245                 break;
 246         case 0xA:
 247                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 248                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 249                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 250                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 251                 break;
 252         case 0xB:
 253                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 254                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 255                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 256                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 257                 break;
 258         case 0xC:
 259                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 260                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 261                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 262                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 263                 break;
 264         case 0xD:
 265                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 266                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
 267                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 268                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 269                 break;
 270         case 0xE:
 271                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
 272                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
 273                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 274                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 275                 break;
 276         case 0xF:
 277                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
 278                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
 279                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 280                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 281                 break;
 282         case 0x10:
 283                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1366;
 284                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 285                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 286                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 287                 break;
 288         case 0x11:
 289                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 290                 viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
 291                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 292                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 293                 break;
 294         case 0x12:
 295                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 296                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 297                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 298                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 299                 break;
 300         case 0x13:
 301                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 302                 viaparinfo->lvds_setting_info->lcd_panel_vres = 800;
 303                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 304                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 305                 break;
 306         case 0x14:
 307                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1360;
 308                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 309                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 310                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 311                 break;
 312         case 0x15:
 313                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 314                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 315                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 316                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 317                 break;
 318         case 0x16:
 319                 viaparinfo->lvds_setting_info->lcd_panel_hres = 480;
 320                 viaparinfo->lvds_setting_info->lcd_panel_vres = 640;
 321                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 322                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 323                 break;
 324         case 0x17:
 325                 /* OLPC XO-1.5 panel */
 326                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1200;
 327                 viaparinfo->lvds_setting_info->lcd_panel_vres = 900;
 328                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 329                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 330                 break;
 331         default:
 332                 viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
 333                 viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
 334                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 335                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 336         }
 337 }
 338
 339 static int lvds_register_read(int index)
 340 {
 341         u8 data;
 342
 343         viafb_i2c_readbyte(VIA_PORT_2C,
 344                         (u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
 345                         (u8) index, &data);
 346         return data;
 347 }
 348
 349 static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
 350                       int panel_vres)
 351 {
 352         int reg_value = 0;
 353         int viafb_load_reg_num;
 354         struct io_register *reg = NULL;
 355
 356         DEBUG_MSG(KERN_INFO "load_lcd_scaling()!!\n");
 357
 358         /* LCD Scaling Enable */
 359         viafb_write_reg_mask(CR79, VIACR, 0x07, BIT0 + BIT1 + BIT2);
 360
 361         /* Check if expansion for horizontal */
 362         if (set_hres < panel_hres) {
 363                 /* Load Horizontal Scaling Factor */
 364                 switch (viaparinfo->chip_info->gfx_chip_name) {
 365                 case UNICHROME_CLE266:
 366                 case UNICHROME_K400:
 367                         reg_value =
 368                             CLE266_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
 369                         viafb_load_reg_num =
 370                             lcd_scaling_factor_CLE.lcd_hor_scaling_factor.
 371                             reg_num;
 372                         reg = lcd_scaling_factor_CLE.lcd_hor_scaling_factor.reg;
 373                         viafb_load_reg(reg_value,
 374                                 viafb_load_reg_num, reg, VIACR);
 375                         break;
 376                 case UNICHROME_K800:
 377                 case UNICHROME_PM800:
 378                 case UNICHROME_CN700:
 379                 case UNICHROME_CX700:
 380                 case UNICHROME_K8M890:
 381                 case UNICHROME_P4M890:
 382                 case UNICHROME_P4M900:
 383                 case UNICHROME_CN750:
 384                 case UNICHROME_VX800:
 385                 case UNICHROME_VX855:
 386                 case UNICHROME_VX900:
 387                         reg_value =
 388                             K800_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
 389                         /* Horizontal scaling enabled */
 390                         viafb_write_reg_mask(CRA2, VIACR, 0xC0, BIT7 + BIT6);
 391                         viafb_load_reg_num =
 392                             lcd_scaling_factor.lcd_hor_scaling_factor.reg_num;
 393                         reg = lcd_scaling_factor.lcd_hor_scaling_factor.reg;
 394                         viafb_load_reg(reg_value,
 395                                 viafb_load_reg_num, reg, VIACR);
 396                         break;
 397                 }
 398
 399                 DEBUG_MSG(KERN_INFO "Horizontal Scaling value = %d", reg_value);
 400         } else {
 401                 /* Horizontal scaling disabled */
 402                 viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT7);
 403         }
 404
 405         /* Check if expansion for vertical */
 406         if (set_vres < panel_vres) {
 407                 /* Load Vertical Scaling Factor */
 408                 switch (viaparinfo->chip_info->gfx_chip_name) {
 409                 case UNICHROME_CLE266:
 410                 case UNICHROME_K400:
 411                         reg_value =
 412                             CLE266_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
 413                         viafb_load_reg_num =
 414                             lcd_scaling_factor_CLE.lcd_ver_scaling_factor.
 415                             reg_num;
 416                         reg = lcd_scaling_factor_CLE.lcd_ver_scaling_factor.reg;
 417                         viafb_load_reg(reg_value,
 418                                 viafb_load_reg_num, reg, VIACR);
 419                         break;
 420                 case UNICHROME_K800:
 421                 case UNICHROME_PM800:
 422                 case UNICHROME_CN700:
 423                 case UNICHROME_CX700:
 424                 case UNICHROME_K8M890:
 425                 case UNICHROME_P4M890:
 426                 case UNICHROME_P4M900:
 427                 case UNICHROME_CN750:
 428                 case UNICHROME_VX800:
 429                 case UNICHROME_VX855:
 430                 case UNICHROME_VX900:
 431                         reg_value =
 432                             K800_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
 433                         /* Vertical scaling enabled */
 434                         viafb_write_reg_mask(CRA2, VIACR, 0x08, BIT3);
 435                         viafb_load_reg_num =
 436                             lcd_scaling_factor.lcd_ver_scaling_factor.reg_num;
 437                         reg = lcd_scaling_factor.lcd_ver_scaling_factor.reg;
 438                         viafb_load_reg(reg_value,
 439                                 viafb_load_reg_num, reg, VIACR);
 440                         break;
 441                 }
 442
 443                 DEBUG_MSG(KERN_INFO "Vertical Scaling value = %d", reg_value);
 444         } else {
 445                 /* Vertical scaling disabled */
 446                 viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT3);
 447         }
 448 }
 449
 450 static void via_pitch_alignment_patch_lcd(int iga_path, int hres, int bpp)
 451 {
 452         unsigned char cr13, cr35, cr65, cr66, cr67;
 453         unsigned long dwScreenPitch = 0;
 454         unsigned long dwPitch;
 455
 456         dwPitch = hres * (bpp >> 3);
 457         if (dwPitch & 0x1F) {
 458                 dwScreenPitch = ((dwPitch + 31) & ~31) >> 3;
 459                 if (iga_path == IGA2) {
 460                         if (bpp > 8) {
 461                                 cr66 = (unsigned char)(dwScreenPitch & 0xFF);
 462                                 viafb_write_reg(CR66, VIACR, cr66);
 463                                 cr67 = viafb_read_reg(VIACR, CR67) & 0xFC;
 464                                 cr67 |=
 465                                     (unsigned
 466                                      char)((dwScreenPitch & 0x300) >> 8);
 467                                 viafb_write_reg(CR67, VIACR, cr67);
 468                         }
 469
 470                         /* Fetch Count */
 471                         cr67 = viafb_read_reg(VIACR, CR67) & 0xF3;
 472                         cr67 |= (unsigned char)((dwScreenPitch & 0x600) >> 7);
 473                         viafb_write_reg(CR67, VIACR, cr67);
 474                         cr65 = (unsigned char)((dwScreenPitch >> 1) & 0xFF);
 475                         cr65 += 2;
 476                         viafb_write_reg(CR65, VIACR, cr65);
 477                 } else {
 478                         if (bpp > 8) {
 479                                 cr13 = (unsigned char)(dwScreenPitch & 0xFF);
 480                                 viafb_write_reg(CR13, VIACR, cr13);
 481                                 cr35 = viafb_read_reg(VIACR, CR35) & 0x1F;
 482                                 cr35 |=
 483                                     (unsigned
 484                                      char)((dwScreenPitch & 0x700) >> 3);
 485                                 viafb_write_reg(CR35, VIACR, cr35);
 486                         }
 487                 }
 488         }
 489 }
 490 static void lcd_patch_skew_dvp0(struct lvds_setting_information
 491                          *plvds_setting_info,
 492                          struct lvds_chip_information *plvds_chip_info)
 493 {
 494         if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
 495                 switch (viaparinfo->chip_info->gfx_chip_name) {
 496                 case UNICHROME_P4M900:
 497                         viafb_vt1636_patch_skew_on_vt3364(plvds_setting_info,
 498                                                     plvds_chip_info);
 499                         break;
 500                 case UNICHROME_P4M890:
 501                         viafb_vt1636_patch_skew_on_vt3327(plvds_setting_info,
 502                                                     plvds_chip_info);
 503                         break;
 504                 }
 505         }
 506 }
 507 static void lcd_patch_skew_dvp1(struct lvds_setting_information
 508                          *plvds_setting_info,
 509                          struct lvds_chip_information *plvds_chip_info)
 510 {
 511         if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
 512                 switch (viaparinfo->chip_info->gfx_chip_name) {
 513                 case UNICHROME_CX700:
 514                         viafb_vt1636_patch_skew_on_vt3324(plvds_setting_info,
 515                                                     plvds_chip_info);
 516                         break;
 517                 }
 518         }
 519 }
 520 static void lcd_patch_skew(struct lvds_setting_information
 521         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
 522 {
 523         DEBUG_MSG(KERN_INFO "lcd_patch_skew\n");
 524         switch (plvds_chip_info->output_interface) {
 525         case INTERFACE_DVP0:
 526                 lcd_patch_skew_dvp0(plvds_setting_info, plvds_chip_info);
 527                 break;
 528         case INTERFACE_DVP1:
 529                 lcd_patch_skew_dvp1(plvds_setting_info, plvds_chip_info);
 530                 break;
 531         case INTERFACE_DFP_LOW:
 532                 if (UNICHROME_P4M900 == viaparinfo->chip_info->gfx_chip_name) {
 533                         viafb_write_reg_mask(CR99, VIACR, 0x08,
 534                                        BIT0 + BIT1 + BIT2 + BIT3);
 535                 }
 536                 break;
 537         }
 538 }
 539
 540 /* LCD Set Mode */
 541 void viafb_lcd_set_mode(const struct fb_var_screeninfo *var, u16 cxres,
 542         u16 cyres, struct lvds_setting_information *plvds_setting_info,
 543         struct lvds_chip_information *plvds_chip_info)
 544 {
 545         int set_iga = plvds_setting_info->iga_path;
 546         int mode_bpp = var->bits_per_pixel;
 547         int set_hres = cxres ? cxres : var->xres;
 548         int set_vres = cyres ? cyres : var->yres;
 549         int panel_hres = plvds_setting_info->lcd_panel_hres;
 550         int panel_vres = plvds_setting_info->lcd_panel_vres;
 551         u32 clock;
 552         struct via_display_timing timing;
 553         struct fb_var_screeninfo panel_var;
 554         const struct fb_videomode *mode_crt_table, *panel_crt_table;
 555
 556         DEBUG_MSG(KERN_INFO "viafb_lcd_set_mode!!\n");
 557         /* Get mode table */
 558         mode_crt_table = viafb_get_best_mode(set_hres, set_vres, 60);
 559         /* Get panel table Pointer */
 560         panel_crt_table = viafb_get_best_mode(panel_hres, panel_vres, 60);
 561         viafb_fill_var_timing_info(&panel_var, panel_crt_table);
 562         DEBUG_MSG(KERN_INFO "bellow viafb_lcd_set_mode!!\n");
 563         if (VT1636_LVDS == plvds_chip_info->lvds_chip_name)
 564                 viafb_init_lvds_vt1636(plvds_setting_info, plvds_chip_info);
 565         clock = PICOS2KHZ(panel_crt_table->pixclock) * 1000;
 566         plvds_setting_info->vclk = clock;
 567
 568         if (set_iga == IGA2 && (set_hres < panel_hres || set_vres < panel_vres)
 569                 && plvds_setting_info->display_method == LCD_EXPANDSION) {
 570                 timing = var_to_timing(&panel_var, panel_hres, panel_vres);
 571                 load_lcd_scaling(set_hres, set_vres, panel_hres, panel_vres);
 572         } else {
 573                 timing = var_to_timing(&panel_var, set_hres, set_vres);
 574                 if (set_iga == IGA2)
 575                         /* disable scaling */
 576                         via_write_reg_mask(VIACR, 0x79, 0x00,
 577                                 BIT0 + BIT1 + BIT2);
 578         }
 579
 580         if (set_iga == IGA1)
 581                 via_set_primary_timing(&timing);
 582         else if (set_iga == IGA2)
 583                 via_set_secondary_timing(&timing);
 584
 585         /* Fetch count for IGA2 only */
 586         viafb_load_fetch_count_reg(set_hres, mode_bpp / 8, set_iga);
 587
 588         if ((viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
 589                 && (viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400))
 590                 viafb_load_FIFO_reg(set_iga, set_hres, set_vres);
 591
 592         fill_lcd_format();
 593         viafb_set_vclock(clock, set_iga);
 594         lcd_patch_skew(plvds_setting_info, plvds_chip_info);
 595
 596         /* If K8M800, enable LCD Prefetch Mode. */
 597         if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800)
 598             || (UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name))
 599                 viafb_write_reg_mask(CR6A, VIACR, 0x01, BIT0);
 600
 601         /* Patch for non 32bit alignment mode */
 602         via_pitch_alignment_patch_lcd(plvds_setting_info->iga_path, set_hres,
 603                 var->bits_per_pixel);
 604 }
 605
 606 static void integrated_lvds_disable(struct lvds_setting_information
 607                              *plvds_setting_info,
 608                              struct lvds_chip_information *plvds_chip_info)
 609 {
 610         bool turn_off_first_powersequence = false;
 611         bool turn_off_second_powersequence = false;
 612         if (INTERFACE_LVDS0LVDS1 == plvds_chip_info->output_interface)
 613                 turn_off_first_powersequence = true;
 614         if (INTERFACE_LVDS0 == plvds_chip_info->output_interface)
 615                 turn_off_first_powersequence = true;
 616         if (INTERFACE_LVDS1 == plvds_chip_info->output_interface)
 617                 turn_off_second_powersequence = true;
 618         if (turn_off_second_powersequence) {
 619                 /* Use second power sequence control: */
 620
 621                 /* Turn off power sequence. */
 622                 viafb_write_reg_mask(CRD4, VIACR, 0, BIT1);
 623
 624                 /* Turn off back light. */
 625                 viafb_write_reg_mask(CRD3, VIACR, 0xC0, BIT6 + BIT7);
 626         }
 627         if (turn_off_first_powersequence) {
 628                 /* Use first power sequence control: */
 629
 630                 /* Turn off power sequence. */
 631                 viafb_write_reg_mask(CR6A, VIACR, 0, BIT3);
 632
 633                 /* Turn off back light. */
 634                 viafb_write_reg_mask(CR91, VIACR, 0xC0, BIT6 + BIT7);
 635         }
 636
 637         /* Power off LVDS channel. */
 638         switch (plvds_chip_info->output_interface) {
 639         case INTERFACE_LVDS0:
 640                 {
 641                         viafb_write_reg_mask(CRD2, VIACR, 0x80, BIT7);
 642                         break;
 643                 }
 644
 645         case INTERFACE_LVDS1:
 646                 {
 647                         viafb_write_reg_mask(CRD2, VIACR, 0x40, BIT6);
 648                         break;
 649                 }
 650
 651         case INTERFACE_LVDS0LVDS1:
 652                 {
 653                         viafb_write_reg_mask(CRD2, VIACR, 0xC0, BIT6 + BIT7);
 654                         break;
 655                 }
 656         }
 657 }
 658
 659 static void integrated_lvds_enable(struct lvds_setting_information
 660                             *plvds_setting_info,
 661                             struct lvds_chip_information *plvds_chip_info)
 662 {
 663         DEBUG_MSG(KERN_INFO "integrated_lvds_enable, out_interface:%d\n",
 664                   plvds_chip_info->output_interface);
 665         if (plvds_setting_info->lcd_mode == LCD_SPWG)
 666                 viafb_write_reg_mask(CRD2, VIACR, 0x00, BIT0 + BIT1);
 667         else
 668                 viafb_write_reg_mask(CRD2, VIACR, 0x03, BIT0 + BIT1);
 669
 670         switch (plvds_chip_info->output_interface) {
 671         case INTERFACE_LVDS0LVDS1:
 672         case INTERFACE_LVDS0:
 673                 /* Use first power sequence control: */
 674                 /* Use hardware control power sequence. */
 675                 viafb_write_reg_mask(CR91, VIACR, 0, BIT0);
 676                 /* Turn on back light. */
 677                 viafb_write_reg_mask(CR91, VIACR, 0, BIT6 + BIT7);
 678                 /* Turn on hardware power sequence. */
 679                 viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
 680                 break;
 681         case INTERFACE_LVDS1:
 682                 /* Use second power sequence control: */
 683                 /* Use hardware control power sequence. */
 684                 viafb_write_reg_mask(CRD3, VIACR, 0, BIT0);
 685                 /* Turn on back light. */
 686                 viafb_write_reg_mask(CRD3, VIACR, 0, BIT6 + BIT7);
 687                 /* Turn on hardware power sequence. */
 688                 viafb_write_reg_mask(CRD4, VIACR, 0x02, BIT1);
 689                 break;
 690         }
 691
 692         /* Power on LVDS channel. */
 693         switch (plvds_chip_info->output_interface) {
 694         case INTERFACE_LVDS0:
 695                 {
 696                         viafb_write_reg_mask(CRD2, VIACR, 0, BIT7);
 697                         break;
 698                 }
 699
 700         case INTERFACE_LVDS1:
 701                 {
 702                         viafb_write_reg_mask(CRD2, VIACR, 0, BIT6);
 703                         break;
 704                 }
 705
 706         case INTERFACE_LVDS0LVDS1:
 707                 {
 708                         viafb_write_reg_mask(CRD2, VIACR, 0, BIT6 + BIT7);
 709                         break;
 710                 }
 711         }
 712 }
 713
 714 void viafb_lcd_disable(void)
 715 {
 716
 717         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
 718                 lcd_powersequence_off();
 719                 /* DI1 pad off */
 720                 viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
 721         } else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
 722                 if (viafb_LCD2_ON
 723                     && (INTEGRATED_LVDS ==
 724                         viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
 725                         integrated_lvds_disable(viaparinfo->lvds_setting_info,
 726                                 &viaparinfo->chip_info->lvds_chip_info2);
 727                 if (INTEGRATED_LVDS ==
 728                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
 729                         integrated_lvds_disable(viaparinfo->lvds_setting_info,
 730                                 &viaparinfo->chip_info->lvds_chip_info);
 731                 if (VT1636_LVDS == viaparinfo->chip_info->
 732                         lvds_chip_info.lvds_chip_name)
 733                         viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
 734                                 &viaparinfo->chip_info->lvds_chip_info);
 735         } else if (VT1636_LVDS ==
 736         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 737                 viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
 738                                     &viaparinfo->chip_info->lvds_chip_info);
 739         } else {
 740                 /* Backlight off           */
 741                 viafb_write_reg_mask(SR3D, VIASR, 0x00, 0x20);
 742                 /* 24 bit DI data paht off */
 743                 viafb_write_reg_mask(CR91, VIACR, 0x80, 0x80);
 744         }
 745
 746         /* Disable expansion bit   */
 747         viafb_write_reg_mask(CR79, VIACR, 0x00, 0x01);
 748         /* Simultaneout disabled   */
 749         viafb_write_reg_mask(CR6B, VIACR, 0x00, 0x08);
 750 }
 751
 752 static void set_lcd_output_path(int set_iga, int output_interface)
 753 {
 754         switch (output_interface) {
 755         case INTERFACE_DFP:
 756                 if ((UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name)
 757                     || (UNICHROME_P4M890 ==
 758                     viaparinfo->chip_info->gfx_chip_name))
 759                         viafb_write_reg_mask(CR97, VIACR, 0x84,
 760                                        BIT7 + BIT2 + BIT1 + BIT0);
 761         case INTERFACE_DVP0:
 762         case INTERFACE_DVP1:
 763         case INTERFACE_DFP_HIGH:
 764         case INTERFACE_DFP_LOW:
 765                 if (set_iga == IGA2)
 766                         viafb_write_reg(CR91, VIACR, 0x00);
 767                 break;
 768         }
 769 }
 770
 771 void viafb_lcd_enable(void)
 772 {
 773         viafb_write_reg_mask(CR6B, VIACR, 0x00, BIT3);
 774         viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
 775         set_lcd_output_path(viaparinfo->lvds_setting_info->iga_path,
 776                 viaparinfo->chip_info->lvds_chip_info.output_interface);
 777         if (viafb_LCD2_ON)
 778                 set_lcd_output_path(viaparinfo->lvds_setting_info2->iga_path,
 779                         viaparinfo->chip_info->
 780                         lvds_chip_info2.output_interface);
 781
 782         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
 783                 /* DI1 pad on */
 784                 viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
 785                 lcd_powersequence_on();
 786         } else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
 787                 if (viafb_LCD2_ON && (INTEGRATED_LVDS ==
 788                         viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
 789                         integrated_lvds_enable(viaparinfo->lvds_setting_info2, \
 790                                 &viaparinfo->chip_info->lvds_chip_info2);
 791                 if (INTEGRATED_LVDS ==
 792                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
 793                         integrated_lvds_enable(viaparinfo->lvds_setting_info,
 794                                 &viaparinfo->chip_info->lvds_chip_info);
 795                 if (VT1636_LVDS == viaparinfo->chip_info->
 796                         lvds_chip_info.lvds_chip_name)
 797                         viafb_enable_lvds_vt1636(viaparinfo->
 798                         lvds_setting_info, &viaparinfo->chip_info->
 799                         lvds_chip_info);
 800         } else if (VT1636_LVDS ==
 801         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 802                 viafb_enable_lvds_vt1636(viaparinfo->lvds_setting_info,
 803                                    &viaparinfo->chip_info->lvds_chip_info);
 804         } else {
 805                 /* Backlight on            */
 806                 viafb_write_reg_mask(SR3D, VIASR, 0x20, 0x20);
 807                 /* 24 bit DI data paht on  */
 808                 viafb_write_reg_mask(CR91, VIACR, 0x00, 0x80);
 809                 /* LCD enabled             */
 810                 viafb_write_reg_mask(CR6A, VIACR, 0x48, 0x48);
 811         }
 812 }
 813
 814 static void lcd_powersequence_off(void)
 815 {
 816         int i, mask, data;
 817
 818         /* Software control power sequence */
 819         viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);
 820
 821         for (i = 0; i < 3; i++) {
 822                 mask = PowerSequenceOff[0][i];
 823                 data = PowerSequenceOff[1][i] & mask;
 824                 viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
 825                 udelay(PowerSequenceOff[2][i]);
 826         }
 827
 828         /* Disable LCD */
 829         viafb_write_reg_mask(CR6A, VIACR, 0x00, 0x08);
 830 }
 831
 832 static void lcd_powersequence_on(void)
 833 {
 834         int i, mask, data;
 835
 836         /* Software control power sequence */
 837         viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);
 838
 839         /* Enable LCD */
 840         viafb_write_reg_mask(CR6A, VIACR, 0x08, 0x08);
 841
 842         for (i = 0; i < 3; i++) {
 843                 mask = PowerSequenceOn[0][i];
 844                 data = PowerSequenceOn[1][i] & mask;
 845                 viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
 846                 udelay(PowerSequenceOn[2][i]);
 847         }
 848
 849         udelay(1);
 850 }
 851
 852 static void fill_lcd_format(void)
 853 {
 854         u8 bdithering = 0, bdual = 0;
 855
 856         if (viaparinfo->lvds_setting_info->device_lcd_dualedge)
 857                 bdual = BIT4;
 858         if (viaparinfo->lvds_setting_info->LCDDithering)
 859                 bdithering = BIT0;
 860         /* Dual & Dithering */
 861         viafb_write_reg_mask(CR88, VIACR, (bdithering | bdual), BIT4 + BIT0);
 862 }
 863
 864 static void check_diport_of_integrated_lvds(
 865         struct lvds_chip_information *plvds_chip_info,
 866                                      struct lvds_setting_information
 867                                      *plvds_setting_info)
 868 {
 869         /* Determine LCD DI Port by hardware layout. */
 870         switch (viafb_display_hardware_layout) {
 871         case HW_LAYOUT_LCD_ONLY:
 872                 {
 873                         if (plvds_setting_info->device_lcd_dualedge) {
 874                                 plvds_chip_info->output_interface =
 875                                     INTERFACE_LVDS0LVDS1;
 876                         } else {
 877                                 plvds_chip_info->output_interface =
 878                                     INTERFACE_LVDS0;
 879                         }
 880
 881                         break;
 882                 }
 883
 884         case HW_LAYOUT_DVI_ONLY:
 885                 {
 886                         plvds_chip_info->output_interface = INTERFACE_NONE;
 887                         break;
 888                 }
 889
 890         case HW_LAYOUT_LCD1_LCD2:
 891         case HW_LAYOUT_LCD_EXTERNAL_LCD2:
 892                 {
 893                         plvds_chip_info->output_interface =
 894                             INTERFACE_LVDS0LVDS1;
 895                         break;
 896                 }
 897
 898         case HW_LAYOUT_LCD_DVI:
 899                 {
 900                         plvds_chip_info->output_interface = INTERFACE_LVDS1;
 901                         break;
 902                 }
 903
 904         default:
 905                 {
 906                         plvds_chip_info->output_interface = INTERFACE_LVDS1;
 907                         break;
 908                 }
 909         }
 910
 911         DEBUG_MSG(KERN_INFO
 912                   "Display Hardware Layout: 0x%x, LCD DI Port: 0x%x\n",
 913                   viafb_display_hardware_layout,
 914                   plvds_chip_info->output_interface);
 915 }
 916
 917 void viafb_init_lvds_output_interface(struct lvds_chip_information
 918                                 *plvds_chip_info,
 919                                 struct lvds_setting_information
 920                                 *plvds_setting_info)
 921 {
 922         if (INTERFACE_NONE != plvds_chip_info->output_interface) {
 923                 /*Do nothing, lcd port is specified by module parameter */
 924                 return;
 925         }
 926
 927         switch (plvds_chip_info->lvds_chip_name) {
 928
 929         case VT1636_LVDS:
 930                 switch (viaparinfo->chip_info->gfx_chip_name) {
 931                 case UNICHROME_CX700:
 932                         plvds_chip_info->output_interface = INTERFACE_DVP1;
 933                         break;
 934                 case UNICHROME_CN700:
 935                         plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
 936                         break;
 937                 default:
 938                         plvds_chip_info->output_interface = INTERFACE_DVP0;
 939                         break;
 940                 }
 941                 break;
 942
 943         case INTEGRATED_LVDS:
 944                 check_diport_of_integrated_lvds(plvds_chip_info,
 945                                                 plvds_setting_info);
 946                 break;
 947
 948         default:
 949                 switch (viaparinfo->chip_info->gfx_chip_name) {
 950                 case UNICHROME_K8M890:
 951                 case UNICHROME_P4M900:
 952                 case UNICHROME_P4M890:
 953                         plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
 954                         break;
 955                 default:
 956                         plvds_chip_info->output_interface = INTERFACE_DFP;
 957                         break;
 958                 }
 959                 break;
 960         }
 961 }
 962
 963 bool viafb_lcd_get_mobile_state(bool *mobile)
 964 {
 965         unsigned char __iomem *romptr, *tableptr, *biosptr;
 966         u8 core_base;
 967         /* Rom address */
 968         const u32 romaddr = 0x000C0000;
 969         u16 start_pattern;
 970
 971         biosptr = ioremap(romaddr, 0x10000);
 972         start_pattern = readw(biosptr);
 973
 974         /* Compare pattern */
 975         if (start_pattern == 0xAA55) {
 976                 /* Get the start of Table */
 977                 /* 0x1B means BIOS offset position */
 978                 romptr = biosptr + 0x1B;
 979                 tableptr = biosptr + readw(romptr);
 980
 981                 /* Get the start of biosver structure */
 982                 /* 18 means BIOS version position. */
 983                 romptr = tableptr + 18;
 984                 romptr = biosptr + readw(romptr);
 985
 986                 /* The offset should be 44, but the
 987                    actual image is less three char. */
 988                 /* pRom += 44; */
 989                 romptr += 41;
 990
 991                 core_base = readb(romptr);
 992
 993                 if (core_base & 0x8)
 994                         *mobile = false;
 995                 else
 996                         *mobile = true;
 997                 /* release memory */
 998                 iounmap(biosptr);
 999
1000                 return true;
1001         } else {
1002                 iounmap(biosptr);
1003                 return false;
1004         }
1005 }