LXR linux/drivers/video/fbdev/via/vt1636.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
   4 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   5
   6 */
   7
   8#include <linux/via-core.h>
   9#include <linux/via_i2c.h>
  10#include "global.h"
  11
  12static const struct IODATA common_init_data[] = {
  13/*  Index, Mask, Value */
  14        /* Set panel power sequence timing */
  15        {0x10, 0xC0, 0x00},
  16        /* T1: VDD on - Data on. Each increment is 1 ms. (50ms = 031h) */
  17        {0x0B, 0xFF, 0x40},
  18        /* T2: Data on - Backlight on. Each increment is 2 ms. (210ms = 068h) */
  19        {0x0C, 0xFF, 0x31},
  20        /* T3: Backlight off -Data off. Each increment is 2 ms. (210ms = 068h)*/
  21        {0x0D, 0xFF, 0x31},
  22        /* T4: Data off - VDD off. Each increment is 1 ms. (50ms = 031h) */
  23        {0x0E, 0xFF, 0x68},
  24        /* T5: VDD off - VDD on. Each increment is 100 ms. (500ms = 04h) */
  25        {0x0F, 0xFF, 0x68},
  26        /* LVDS output power up */
  27        {0x09, 0xA0, 0xA0},
  28        /* turn on back light */
  29        {0x10, 0x33, 0x13}
  30};
  31
  32/* Index, Mask, Value */
  33static const struct IODATA dual_channel_enable_data = {0x08, 0xF0, 0xE0};
  34static const struct IODATA single_channel_enable_data = {0x08, 0xF0, 0x00};
  35static const struct IODATA dithering_enable_data = {0x0A, 0x70, 0x50};
  36static const struct IODATA dithering_disable_data = {0x0A, 0x70, 0x00};
  37static const struct IODATA vdd_on_data = {0x10, 0x20, 0x20};
  38static const struct IODATA vdd_off_data = {0x10, 0x20, 0x00};
  39
  40u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
  41        *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
  42        u8 index)
  43{
  44        u8 data;
  45
  46        viafb_i2c_readbyte(plvds_chip_info->i2c_port,
  47                           plvds_chip_info->lvds_chip_slave_addr, index, &data);
  48        return data;
  49}
  50
  51void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
  52                              *plvds_setting_info, struct lvds_chip_information
  53                              *plvds_chip_info, struct IODATA io_data)
  54{
  55        int index, data;
  56
  57        index = io_data.Index;
  58        data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
  59                index);
  60        data = (data & (~io_data.Mask)) | io_data.Data;
  61
  62        viafb_i2c_writebyte(plvds_chip_info->i2c_port,
  63                            plvds_chip_info->lvds_chip_slave_addr, index, data);
  64}
  65
  66void viafb_init_lvds_vt1636(struct lvds_setting_information
  67        *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
  68{
  69        int reg_num, i;
  70
  71        /* Common settings: */
  72        reg_num = ARRAY_SIZE(common_init_data);
  73        for (i = 0; i < reg_num; i++)
  74                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  75                        plvds_chip_info, common_init_data[i]);
  76
  77        /* Input Data Mode Select */
  78        if (plvds_setting_info->device_lcd_dualedge)
  79                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  80                        plvds_chip_info, dual_channel_enable_data);
  81        else
  82                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  83                        plvds_chip_info, single_channel_enable_data);
  84
  85        if (plvds_setting_info->LCDDithering)
  86                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  87                        plvds_chip_info, dithering_enable_data);
  88        else
  89                viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
  90                        plvds_chip_info, dithering_disable_data);
  91}
  92
  93void viafb_enable_lvds_vt1636(struct lvds_setting_information
  94                        *plvds_setting_info,
  95                        struct lvds_chip_information *plvds_chip_info)
  96{
  97        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
  98                vdd_on_data);
  99}
 100
 101void viafb_disable_lvds_vt1636(struct lvds_setting_information
 102                         *plvds_setting_info,
 103                         struct lvds_chip_information *plvds_chip_info)
 104{
 105        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
 106                vdd_off_data);
 107}
 108
 109bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
 110{
 111        u8 Buffer[2];
 112
 113        DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
 114
 115        /* Sense VT1636 LVDS Transmiter */
 116        viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 117                VT1636_LVDS_I2C_ADDR;
 118
 119        /* Check vendor ID first: */
 120        if (viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR,
 121                                        0x00, &Buffer[0]))
 122                return false;
 123        viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x01, &Buffer[1]);
 124
 125        if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
 126                return false;
 127
 128        /* Check Chip ID: */
 129        viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x02, &Buffer[0]);
 130        viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x03, &Buffer[1]);
 131        if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
 132                viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 133                        VT1636_LVDS;
 134                return true;
 135        }
 136
 137        return false;
 138}
 139
 140static int get_clk_range_index(u32 Clk)
 141{
 142        if (Clk < DPA_CLK_30M)
 143                return DPA_CLK_RANGE_30M;
 144        else if (Clk < DPA_CLK_50M)
 145                return DPA_CLK_RANGE_30_50M;
 146        else if (Clk < DPA_CLK_70M)
 147                return DPA_CLK_RANGE_50_70M;
 148        else if (Clk < DPA_CLK_100M)
 149                return DPA_CLK_RANGE_70_100M;
 150        else if (Clk < DPA_CLK_150M)
 151                return DPA_CLK_RANGE_100_150M;
 152        else
 153                return DPA_CLK_RANGE_150M;
 154}
 155
 156static void set_dpa_vt1636(struct lvds_setting_information
 157        *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
 158                    struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
 159{
 160        struct IODATA io_data;
 161
 162        io_data.Index = 0x09;
 163        io_data.Mask = 0x1F;
 164        io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
 165        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
 166                plvds_chip_info, io_data);
 167
 168        io_data.Index = 0x08;
 169        io_data.Mask = 0x0F;
 170        io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
 171        viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
 172                io_data);
 173}
 174
 175void viafb_vt1636_patch_skew_on_vt3324(
 176        struct lvds_setting_information *plvds_setting_info,
 177        struct lvds_chip_information *plvds_chip_info)
 178{
 179        struct VT1636_DPA_SETTING dpa = {0x00, 0x00}, dpa_16x12 = {0x0B, 0x03},
 180                *pdpa;
 181        int index;
 182
 183        DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
 184
 185        /* Graphics DPA settings: */
 186        index = get_clk_range_index(plvds_setting_info->vclk);
 187        viafb_set_dpa_gfx(plvds_chip_info->output_interface,
 188                    &GFX_DPA_SETTING_TBL_VT3324[index]);
 189
 190        /* LVDS Transmitter DPA settings: */
 191        if (plvds_setting_info->lcd_panel_hres == 1600 &&
 192                plvds_setting_info->lcd_panel_vres == 1200)
 193                pdpa = &dpa_16x12;
 194        else
 195                pdpa = &dpa;
 196
 197        set_dpa_vt1636(plvds_setting_info, plvds_chip_info, pdpa);
 198}
 199
 200void viafb_vt1636_patch_skew_on_vt3327(
 201        struct lvds_setting_information *plvds_setting_info,
 202        struct lvds_chip_information *plvds_chip_info)
 203{
 204        struct VT1636_DPA_SETTING dpa = {0x00, 0x00};
 205        int index;
 206
 207        DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
 208
 209        /* Graphics DPA settings: */
 210        index = get_clk_range_index(plvds_setting_info->vclk);
 211        viafb_set_dpa_gfx(plvds_chip_info->output_interface,
 212                    &GFX_DPA_SETTING_TBL_VT3327[index]);
 213
 214        /* LVDS Transmitter DPA settings: */
 215        set_dpa_vt1636(plvds_setting_info, plvds_chip_info, &dpa);
 216}
 217
 218void viafb_vt1636_patch_skew_on_vt3364(
 219        struct lvds_setting_information *plvds_setting_info,
 220        struct lvds_chip_information *plvds_chip_info)
 221{
 222        int index;
 223
 224        DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
 225
 226        /* Graphics DPA settings: */
 227        index = get_clk_range_index(plvds_setting_info->vclk);
 228        viafb_set_dpa_gfx(plvds_chip_info->output_interface,
 229                    &GFX_DPA_SETTING_TBL_VT3364[index]);
 230}
 231