drivers/video/fbdev/via/dvi.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 static void tmds_register_write(int index, u8 data);
  26 static int tmds_register_read(int index);
  27 static int tmds_register_read_bytes(int index, u8 *buff, int buff_len);
  28 static void dvi_get_panel_size_from_DDCv1(
  29         struct tmds_chip_information *tmds_chip,
  30         struct tmds_setting_information *tmds_setting);
  31 static int viafb_dvi_query_EDID(void);
  32
  33 static inline bool check_tmds_chip(int device_id_subaddr, int device_id)
  34 {
  35         return tmds_register_read(device_id_subaddr) == device_id;
  36 }
  37
  38 void viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
  39                          struct tmds_setting_information *tmds_setting)
  40 {
  41         DEBUG_MSG(KERN_INFO "viafb_init_dvi_size()\n");
  42
  43         viafb_dvi_sense();
  44         if (viafb_dvi_query_EDID() == 1)
  45                 dvi_get_panel_size_from_DDCv1(tmds_chip, tmds_setting);
  46
  47         return;
  48 }
  49
  50 bool viafb_tmds_trasmitter_identify(void)
  51 {
  52         unsigned char sr2a = 0, sr1e = 0, sr3e = 0;
  53
  54         /* Turn on ouputting pad */
  55         switch (viaparinfo->chip_info->gfx_chip_name) {
  56         case UNICHROME_K8M890:
  57             /*=* DFP Low Pad on *=*/
  58                 sr2a = viafb_read_reg(VIASR, SR2A);
  59                 viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
  60                 break;
  61
  62         case UNICHROME_P4M900:
  63         case UNICHROME_P4M890:
  64                 /* DFP Low Pad on */
  65                 sr2a = viafb_read_reg(VIASR, SR2A);
  66                 viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
  67                 /* DVP0 Pad on */
  68                 sr1e = viafb_read_reg(VIASR, SR1E);
  69                 viafb_write_reg_mask(SR1E, VIASR, 0xC0, BIT6 + BIT7);
  70                 break;
  71
  72         default:
  73             /* DVP0/DVP1 Pad on */
  74                 sr1e = viafb_read_reg(VIASR, SR1E);
  75                 viafb_write_reg_mask(SR1E, VIASR, 0xF0, BIT4 +
  76                         BIT5 + BIT6 + BIT7);
  77             /* SR3E[1]Multi-function selection:
  78             0 = Emulate I2C and DDC bus by GPIO2/3/4. */
  79                 sr3e = viafb_read_reg(VIASR, SR3E);
  80                 viafb_write_reg_mask(SR3E, VIASR, 0x0, BIT5);
  81                 break;
  82         }
  83
  84         /* Check for VT1632: */
  85         viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = VT1632_TMDS;
  86         viaparinfo->chip_info->
  87                 tmds_chip_info.tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
  88         viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_31;
  89         if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
  90                 /*
  91                  * Currently only support 12bits,dual edge,add 24bits mode later
  92                  */
  93                 tmds_register_write(0x08, 0x3b);
  94
  95                 DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
  96                 DEBUG_MSG(KERN_INFO "\n %2d",
  97                           viaparinfo->chip_info->tmds_chip_info.tmds_chip_name);
  98                 DEBUG_MSG(KERN_INFO "\n %2d",
  99                           viaparinfo->chip_info->tmds_chip_info.i2c_port);
 100                 return true;
 101         } else {
 102                 viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_2C;
 103                 if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
 104                         tmds_register_write(0x08, 0x3b);
 105                         DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
 106                         DEBUG_MSG(KERN_INFO "\n %2d",
 107                                   viaparinfo->chip_info->
 108                                   tmds_chip_info.tmds_chip_name);
 109                         DEBUG_MSG(KERN_INFO "\n %2d",
 110                                   viaparinfo->chip_info->
 111                                   tmds_chip_info.i2c_port);
 112                         return true;
 113                 }
 114         }
 115
 116         viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = INTEGRATED_TMDS;
 117
 118         if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) &&
 119             ((viafb_display_hardware_layout == HW_LAYOUT_DVI_ONLY) ||
 120              (viafb_display_hardware_layout == HW_LAYOUT_LCD_DVI))) {
 121                 DEBUG_MSG(KERN_INFO "\n Integrated TMDS ! \n");
 122                 return true;
 123         }
 124
 125         switch (viaparinfo->chip_info->gfx_chip_name) {
 126         case UNICHROME_K8M890:
 127                 viafb_write_reg(SR2A, VIASR, sr2a);
 128                 break;
 129
 130         case UNICHROME_P4M900:
 131         case UNICHROME_P4M890:
 132                 viafb_write_reg(SR2A, VIASR, sr2a);
 133                 viafb_write_reg(SR1E, VIASR, sr1e);
 134                 break;
 135
 136         default:
 137                 viafb_write_reg(SR1E, VIASR, sr1e);
 138                 viafb_write_reg(SR3E, VIASR, sr3e);
 139                 break;
 140         }
 141
 142         viaparinfo->chip_info->
 143                 tmds_chip_info.tmds_chip_name = NON_TMDS_TRANSMITTER;
 144         viaparinfo->chip_info->tmds_chip_info.
 145                 tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
 146         return false;
 147 }
 148
 149 static void tmds_register_write(int index, u8 data)
 150 {
 151         viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
 152                             viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
 153                             index, data);
 154 }
 155
 156 static int tmds_register_read(int index)
 157 {
 158         u8 data;
 159
 160         viafb_i2c_readbyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
 161                            (u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
 162                            (u8) index, &data);
 163         return data;
 164 }
 165
 166 static int tmds_register_read_bytes(int index, u8 *buff, int buff_len)
 167 {
 168         viafb_i2c_readbytes(viaparinfo->chip_info->tmds_chip_info.i2c_port,
 169                             (u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
 170                             (u8) index, buff, buff_len);
 171         return 0;
 172 }
 173
 174 /* DVI Set Mode */
 175 void viafb_dvi_set_mode(const struct fb_var_screeninfo *var,
 176         u16 cxres, u16 cyres, int iga)
 177 {
 178         struct fb_var_screeninfo dvi_var = *var;
 179         const struct fb_videomode *rb_mode;
 180         int maxPixelClock;
 181
 182         maxPixelClock = viaparinfo->shared->tmds_setting_info.max_pixel_clock;
 183         if (maxPixelClock && PICOS2KHZ(var->pixclock) / 1000 > maxPixelClock) {
 184                 rb_mode = viafb_get_best_rb_mode(var->xres, var->yres, 60);
 185                 if (rb_mode)
 186                         viafb_fill_var_timing_info(&dvi_var, rb_mode);
 187         }
 188
 189         viafb_fill_crtc_timing(&dvi_var, cxres, cyres, iga);
 190 }
 191
 192 /* Sense DVI Connector */
 193 int viafb_dvi_sense(void)
 194 {
 195         u8 RegSR1E = 0, RegSR3E = 0, RegCR6B = 0, RegCR91 = 0,
 196                 RegCR93 = 0, RegCR9B = 0, data;
 197         int ret = false;
 198
 199         DEBUG_MSG(KERN_INFO "viafb_dvi_sense!!\n");
 200
 201         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
 202                 /* DI1 Pad on */
 203                 RegSR1E = viafb_read_reg(VIASR, SR1E);
 204                 viafb_write_reg(SR1E, VIASR, RegSR1E | 0x30);
 205
 206                 /* CR6B[0]VCK Input Selection: 1 = External clock. */
 207                 RegCR6B = viafb_read_reg(VIACR, CR6B);
 208                 viafb_write_reg(CR6B, VIACR, RegCR6B | 0x08);
 209
 210                 /* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
 211                    [0] Software Control Power Sequence */
 212                 RegCR91 = viafb_read_reg(VIACR, CR91);
 213                 viafb_write_reg(CR91, VIACR, 0x1D);
 214
 215                 /* CR93[7] DI1 Data Source Selection: 1 = DSP2.
 216                    CR93[5] DI1 Clock Source: 1 = internal.
 217                    CR93[4] DI1 Clock Polarity.
 218                    CR93[3:1] DI1 Clock Adjust. CR93[0] DI1 enable */
 219                 RegCR93 = viafb_read_reg(VIACR, CR93);
 220                 viafb_write_reg(CR93, VIACR, 0x01);
 221         } else {
 222                 /* DVP0/DVP1 Pad on */
 223                 RegSR1E = viafb_read_reg(VIASR, SR1E);
 224                 viafb_write_reg(SR1E, VIASR, RegSR1E | 0xF0);
 225
 226                 /* SR3E[1]Multi-function selection:
 227                    0 = Emulate I2C and DDC bus by GPIO2/3/4. */
 228                 RegSR3E = viafb_read_reg(VIASR, SR3E);
 229                 viafb_write_reg(SR3E, VIASR, RegSR3E & (~0x20));
 230
 231                 /* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
 232                    [0] Software Control Power Sequence */
 233                 RegCR91 = viafb_read_reg(VIACR, CR91);
 234                 viafb_write_reg(CR91, VIACR, 0x1D);
 235
 236                 /*CR9B[4] DVP1 Data Source Selection: 1 = From secondary
 237                 display.CR9B[2:0] DVP1 Clock Adjust */
 238                 RegCR9B = viafb_read_reg(VIACR, CR9B);
 239                 viafb_write_reg(CR9B, VIACR, 0x01);
 240         }
 241
 242         data = (u8) tmds_register_read(0x09);
 243         if (data & 0x04)
 244                 ret = true;
 245
 246         if (ret == false) {
 247                 if (viafb_dvi_query_EDID())
 248                         ret = true;
 249         }
 250
 251         /* Restore status */
 252         viafb_write_reg(SR1E, VIASR, RegSR1E);
 253         viafb_write_reg(CR91, VIACR, RegCR91);
 254         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
 255                 viafb_write_reg(CR6B, VIACR, RegCR6B);
 256                 viafb_write_reg(CR93, VIACR, RegCR93);
 257         } else {
 258                 viafb_write_reg(SR3E, VIASR, RegSR3E);
 259                 viafb_write_reg(CR9B, VIACR, RegCR9B);
 260         }
 261
 262         return ret;
 263 }
 264
 265 /* Query Flat Panel's EDID Table Version Through DVI Connector */
 266 static int viafb_dvi_query_EDID(void)
 267 {
 268         u8 data0, data1;
 269         int restore;
 270
 271         DEBUG_MSG(KERN_INFO "viafb_dvi_query_EDID!!\n");
 272
 273         restore = viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr;
 274         viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr = 0xA0;
 275
 276         data0 = (u8) tmds_register_read(0x00);
 277         data1 = (u8) tmds_register_read(0x01);
 278         if ((data0 == 0) && (data1 == 0xFF)) {
 279                 viaparinfo->chip_info->
 280                         tmds_chip_info.tmds_chip_slave_addr = restore;
 281                 return EDID_VERSION_1;  /* Found EDID1 Table */
 282         }
 283
 284         return false;
 285 }
 286
 287 /* Get Panel Size Using EDID1 Table */
 288 static void dvi_get_panel_size_from_DDCv1(
 289         struct tmds_chip_information *tmds_chip,
 290         struct tmds_setting_information *tmds_setting)
 291 {
 292         int i, restore;
 293         unsigned char EDID_DATA[18];
 294
 295         DEBUG_MSG(KERN_INFO "\n dvi_get_panel_size_from_DDCv1 \n");
 296
 297         restore = tmds_chip->tmds_chip_slave_addr;
 298         tmds_chip->tmds_chip_slave_addr = 0xA0;
 299         for (i = 0x25; i < 0x6D; i++) {
 300                 switch (i) {
 301                 case 0x36:
 302                 case 0x48:
 303                 case 0x5A:
 304                 case 0x6C:
 305                         tmds_register_read_bytes(i, EDID_DATA, 10);
 306                         if (!(EDID_DATA[0] || EDID_DATA[1])) {
 307                                 /* The first two byte must be zero. */
 308                                 if (EDID_DATA[3] == 0xFD) {
 309                                         /* To get max pixel clock. */
 310                                         tmds_setting->max_pixel_clock =
 311                                                 EDID_DATA[9] * 10;
 312                                 }
 313                         }
 314                         break;
 315
 316                 default:
 317                         break;
 318                 }
 319         }
 320
 321         DEBUG_MSG(KERN_INFO "DVI max pixelclock = %d\n",
 322                 tmds_setting->max_pixel_clock);
 323         tmds_chip->tmds_chip_slave_addr = restore;
 324 }
 325
 326 /* If Disable DVI, turn off pad */
 327 void viafb_dvi_disable(void)
 328 {
 329         if (viaparinfo->chip_info->
 330                 tmds_chip_info.output_interface == INTERFACE_TMDS)
 331                 /* Turn off TMDS power. */
 332                 viafb_write_reg(CRD2, VIACR,
 333                 viafb_read_reg(VIACR, CRD2) | 0x08);
 334 }
 335
 336 static void dvi_patch_skew_dvp0(void)
 337 {
 338         /* Reset data driving first: */
 339         viafb_write_reg_mask(SR1B, VIASR, 0, BIT1);
 340         viafb_write_reg_mask(SR2A, VIASR, 0, BIT4);
 341
 342         switch (viaparinfo->chip_info->gfx_chip_name) {
 343         case UNICHROME_P4M890:
 344                 {
 345                         if ((viaparinfo->tmds_setting_info->h_active == 1600) &&
 346                                 (viaparinfo->tmds_setting_info->v_active ==
 347                                 1200))
 348                                 viafb_write_reg_mask(CR96, VIACR, 0x03,
 349                                                BIT0 + BIT1 + BIT2);
 350                         else
 351                                 viafb_write_reg_mask(CR96, VIACR, 0x07,
 352                                                BIT0 + BIT1 + BIT2);
 353                         break;
 354                 }
 355
 356         case UNICHROME_P4M900:
 357                 {
 358                         viafb_write_reg_mask(CR96, VIACR, 0x07,
 359                                        BIT0 + BIT1 + BIT2 + BIT3);
 360                         viafb_write_reg_mask(SR1B, VIASR, 0x02, BIT1);
 361                         viafb_write_reg_mask(SR2A, VIASR, 0x10, BIT4);
 362                         break;
 363                 }
 364
 365         default:
 366                 {
 367                         break;
 368                 }
 369         }
 370 }
 371
 372 static void dvi_patch_skew_dvp_low(void)
 373 {
 374         switch (viaparinfo->chip_info->gfx_chip_name) {
 375         case UNICHROME_K8M890:
 376                 {
 377                         viafb_write_reg_mask(CR99, VIACR, 0x03, BIT0 + BIT1);
 378                         break;
 379                 }
 380
 381         case UNICHROME_P4M900:
 382                 {
 383                         viafb_write_reg_mask(CR99, VIACR, 0x08,
 384                                        BIT0 + BIT1 + BIT2 + BIT3);
 385                         break;
 386                 }
 387
 388         case UNICHROME_P4M890:
 389                 {
 390                         viafb_write_reg_mask(CR99, VIACR, 0x0F,
 391                                        BIT0 + BIT1 + BIT2 + BIT3);
 392                         break;
 393                 }
 394
 395         default:
 396                 {
 397                         break;
 398                 }
 399         }
 400 }
 401
 402 /* If Enable DVI, turn off pad */
 403 void viafb_dvi_enable(void)
 404 {
 405         u8 data;
 406
 407         switch (viaparinfo->chip_info->tmds_chip_info.output_interface) {
 408         case INTERFACE_DVP0:
 409                 viafb_write_reg_mask(CR6B, VIACR, 0x01, BIT0);
 410                 viafb_write_reg_mask(CR6C, VIACR, 0x21, BIT0 + BIT5);
 411                 dvi_patch_skew_dvp0();
 412                 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
 413                         tmds_register_write(0x88, 0x3b);
 414                 else
 415                         /*clear CR91[5] to direct on display period
 416                            in the secondary diplay path */
 417                         via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
 418                 break;
 419
 420         case INTERFACE_DVP1:
 421                 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
 422                         viafb_write_reg_mask(CR93, VIACR, 0x21, BIT0 + BIT5);
 423
 424                 /*fix dvi cann't be enabled with MB VT5718C4 - Al Zhang */
 425                 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
 426                         tmds_register_write(0x88, 0x3b);
 427                 else
 428                         /*clear CR91[5] to direct on display period
 429                           in the secondary diplay path */
 430                         via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
 431
 432                 /*fix DVI cannot enable on EPIA-M board */
 433                 if (viafb_platform_epia_dvi == 1) {
 434                         viafb_write_reg_mask(CR91, VIACR, 0x1f, 0x1f);
 435                         viafb_write_reg_mask(CR88, VIACR, 0x00, BIT6 + BIT0);
 436                         if (viafb_bus_width == 24) {
 437                                 if (viafb_device_lcd_dualedge == 1)
 438                                         data = 0x3F;
 439                                 else
 440                                         data = 0x37;
 441                                 viafb_i2c_writebyte(viaparinfo->chip_info->
 442                                         tmds_chip_info.i2c_port,
 443                                         viaparinfo->chip_info->
 444                                         tmds_chip_info.tmds_chip_slave_addr,
 445                                         0x08, data);
 446                         }
 447                 }
 448                 break;
 449
 450         case INTERFACE_DFP_HIGH:
 451                 if (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
 452                         via_write_reg_mask(VIACR, CR97, 0x03, 0x03);
 453
 454                 via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
 455                 break;
 456
 457         case INTERFACE_DFP_LOW:
 458                 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
 459                         break;
 460
 461                 dvi_patch_skew_dvp_low();
 462                 via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
 463                 break;
 464
 465         case INTERFACE_TMDS:
 466                 /* Turn on Display period in the panel path. */
 467                 viafb_write_reg_mask(CR91, VIACR, 0, BIT7);
 468
 469                 /* Turn on TMDS power. */
 470                 viafb_write_reg_mask(CRD2, VIACR, 0, BIT3);
 471                 break;
 472         }
 473
 474         if (viaparinfo->tmds_setting_info->iga_path == IGA2) {
 475                 /* Disable LCD Scaling */
 476                 viafb_write_reg_mask(CR79, VIACR, 0x00, BIT0);
 477         }
 478 }