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