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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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_information41 *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_target_addr, index, &data);48 return data;49}50 51void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information52 *plvds_setting_info, struct lvds_chip_information53 *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_target_addr, index, data);64}65 66void viafb_init_lvds_vt1636(struct lvds_setting_information67 *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 else82 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 else89 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_information94 *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_information102 *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_target_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 else153 return DPA_CLK_RANGE_150M;154}155 156static void set_dpa_vt1636(struct lvds_setting_information157 *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 else195 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