drivers/video/via/vt1636.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
  22 #include <linux/via-core.h>
  23 #include <linux/via_i2c.h>
  24 #include "global.h"
  25
  26 u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
  27         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
  28         u8 index)
  29 {
  30         u8 data;
  31
  32         viafb_i2c_readbyte(plvds_chip_info->i2c_port,
  33                            plvds_chip_info->lvds_chip_slave_addr, index, &data);
  34         return data;
  35 }
  36
  37 void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
  38                               *plvds_setting_info, struct lvds_chip_information
  39                               *plvds_chip_info, struct IODATA io_data)
  40 {
  41         int index, data;
  42
  43         index = io_data.Index;
  44         data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
  45                 index);
  46         data = (data & (~io_data.Mask)) | io_data.Data;
  47
  48         viafb_i2c_writebyte(plvds_chip_info->i2c_port,
  49                             plvds_chip_info->lvds_chip_slave_addr, index, data);
  50 }
  51
  52 void viafb_init_lvds_vt1636(struct lvds_setting_information
  53         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
  54 {
  55         int reg_num, i;
  56
  57         /* Common settings: */
  58         reg_num = ARRAY_SIZE(COMMON_INIT_TBL_VT1636);
  59
  60         for (i = 0; i < reg_num; i++) {
  61                 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  62                                          plvds_chip_info,
  63                                          COMMON_INIT_TBL_VT1636[i]);
  64         }
  65
  66         /* Input Data Mode Select */
  67         if (plvds_setting_info->device_lcd_dualedge) {
  68                 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  69                                          plvds_chip_info,
  70                                          DUAL_CHANNEL_ENABLE_TBL_VT1636[0]);
  71         } else {
  72                 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  73                                          plvds_chip_info,
  74                                          SINGLE_CHANNEL_ENABLE_TBL_VT1636[0]);
  75         }
  76
  77         if (plvds_setting_info->LCDDithering) {
  78                 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  79                                          plvds_chip_info,
  80                                          DITHERING_ENABLE_TBL_VT1636[0]);
  81         } else {
  82                 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  83                                          plvds_chip_info,
  84                                          DITHERING_DISABLE_TBL_VT1636[0]);
  85         }
  86 }
  87
  88 void viafb_enable_lvds_vt1636(struct lvds_setting_information
  89                         *plvds_setting_info,
  90                         struct lvds_chip_information *plvds_chip_info)
  91 {
  92
  93         viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
  94                                  VDD_ON_TBL_VT1636[0]);
  95
  96         /* Pad on: */
  97         switch (plvds_chip_info->output_interface) {
  98         case INTERFACE_DVP0:
  99                 {
 100                         viafb_write_reg_mask(SR1E, VIASR, 0xC0, 0xC0);
 101                         break;
 102                 }
 103
 104         case INTERFACE_DVP1:
 105                 {
 106                         viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
 107                         break;
 108                 }
 109
 110         case INTERFACE_DFP_LOW:
 111                 {
 112                         viafb_write_reg_mask(SR2A, VIASR, 0x03, 0x03);
 113                         break;
 114                 }
 115
 116         case INTERFACE_DFP_HIGH:
 117                 {
 118                         viafb_write_reg_mask(SR2A, VIASR, 0x03, 0x0C);
 119                         break;
 120                 }
 121
 122         }
 123 }
 124
 125 void viafb_disable_lvds_vt1636(struct lvds_setting_information
 126                          *plvds_setting_info,
 127                          struct lvds_chip_information *plvds_chip_info)
 128 {
 129
 130         viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
 131                                  VDD_OFF_TBL_VT1636[0]);
 132
 133         /* Pad off: */
 134         switch (plvds_chip_info->output_interface) {
 135         case INTERFACE_DVP0:
 136                 {
 137                         viafb_write_reg_mask(SR1E, VIASR, 0x00, 0xC0);
 138                         break;
 139                 }
 140
 141         case INTERFACE_DVP1:
 142                 {
 143                         viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
 144                         break;
 145                 }
 146
 147         case INTERFACE_DFP_LOW:
 148                 {
 149                         viafb_write_reg_mask(SR2A, VIASR, 0x00, 0x03);
 150                         break;
 151                 }
 152
 153         case INTERFACE_DFP_HIGH:
 154                 {
 155                         viafb_write_reg_mask(SR2A, VIASR, 0x00, 0x0C);
 156                         break;
 157                 }
 158
 159         }
 160 }
 161
 162 bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
 163 {
 164         u8 Buffer[2];
 165
 166         DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
 167
 168         /* Sense VT1636 LVDS Transmiter */
 169         viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 170                 VT1636_LVDS_I2C_ADDR;
 171
 172         /* Check vendor ID first: */
 173         if (viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR,
 174                                         0x00, &Buffer[0]))
 175                 return false;
 176         viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x01, &Buffer[1]);
 177
 178         if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
 179                 return false;
 180
 181         /* Check Chip ID: */
 182         viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x02, &Buffer[0]);
 183         viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x03, &Buffer[1]);
 184         if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
 185                 viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 186                         VT1636_LVDS;
 187                 return true;
 188         }
 189
 190         return false;
 191 }
 192
 193 static int get_clk_range_index(u32 Clk)
 194 {
 195         if (Clk < DPA_CLK_30M)
 196                 return DPA_CLK_RANGE_30M;
 197         else if (Clk < DPA_CLK_50M)
 198                 return DPA_CLK_RANGE_30_50M;
 199         else if (Clk < DPA_CLK_70M)
 200                 return DPA_CLK_RANGE_50_70M;
 201         else if (Clk < DPA_CLK_100M)
 202                 return DPA_CLK_RANGE_70_100M;
 203         else if (Clk < DPA_CLK_150M)
 204                 return DPA_CLK_RANGE_100_150M;
 205         else
 206                 return DPA_CLK_RANGE_150M;
 207 }
 208
 209 static int get_lvds_dpa_setting_index(int panel_size_id,
 210                              struct VT1636_DPA_SETTING *p_vt1636_dpasetting_tbl,
 211                                int tbl_size)
 212 {
 213         int i;
 214
 215         for (i = 0; i < tbl_size; i++) {
 216                 if (panel_size_id == p_vt1636_dpasetting_tbl->PanelSizeID)
 217                         return i;
 218
 219                 p_vt1636_dpasetting_tbl++;
 220         }
 221
 222         return 0;
 223 }
 224
 225 static void set_dpa_vt1636(struct lvds_setting_information
 226         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
 227                     struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
 228 {
 229         struct IODATA io_data;
 230
 231         io_data.Index = 0x09;
 232         io_data.Mask = 0x1F;
 233         io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
 234         viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
 235                 plvds_chip_info, io_data);
 236
 237         io_data.Index = 0x08;
 238         io_data.Mask = 0x0F;
 239         io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
 240         viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
 241                 io_data);
 242 }
 243
 244 void viafb_vt1636_patch_skew_on_vt3324(
 245         struct lvds_setting_information *plvds_setting_info,
 246         struct lvds_chip_information *plvds_chip_info)
 247 {
 248         int index, size;
 249
 250         DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
 251
 252         /* Graphics DPA settings: */
 253         index = get_clk_range_index(plvds_setting_info->vclk);
 254         viafb_set_dpa_gfx(plvds_chip_info->output_interface,
 255                     &GFX_DPA_SETTING_TBL_VT3324[index]);
 256
 257         /* LVDS Transmitter DPA settings: */
 258         size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3324);
 259         index =
 260             get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
 261                                        VT1636_DPA_SETTING_TBL_VT3324, size);
 262         set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
 263                        &VT1636_DPA_SETTING_TBL_VT3324[index]);
 264 }
 265
 266 void viafb_vt1636_patch_skew_on_vt3327(
 267         struct lvds_setting_information *plvds_setting_info,
 268         struct lvds_chip_information *plvds_chip_info)
 269 {
 270         int index, size;
 271
 272         DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
 273
 274         /* Graphics DPA settings: */
 275         index = get_clk_range_index(plvds_setting_info->vclk);
 276         viafb_set_dpa_gfx(plvds_chip_info->output_interface,
 277                     &GFX_DPA_SETTING_TBL_VT3327[index]);
 278
 279         /* LVDS Transmitter DPA settings: */
 280         size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3327);
 281         index =
 282             get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
 283                                        VT1636_DPA_SETTING_TBL_VT3327, size);
 284         set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
 285                        &VT1636_DPA_SETTING_TBL_VT3327[index]);
 286 }
 287
 288 void viafb_vt1636_patch_skew_on_vt3364(
 289         struct lvds_setting_information *plvds_setting_info,
 290         struct lvds_chip_information *plvds_chip_info)
 291 {
 292         int index;
 293
 294         DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
 295
 296         /* Graphics DPA settings: */
 297         index = get_clk_range_index(plvds_setting_info->vclk);
 298         viafb_set_dpa_gfx(plvds_chip_info->output_interface,
 299                     &GFX_DPA_SETTING_TBL_VT3364[index]);
 300 }