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 | |
12 | static 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 */ |
33 | static const struct IODATA dual_channel_enable_data = {0x08, 0xF0, 0xE0}; |
34 | static const struct IODATA single_channel_enable_data = {0x08, 0xF0, 0x00}; |
35 | static const struct IODATA dithering_enable_data = {0x0A, 0x70, 0x50}; |
36 | static const struct IODATA dithering_disable_data = {0x0A, 0x70, 0x00}; |
37 | static const struct IODATA vdd_on_data = {0x10, 0x20, 0x20}; |
38 | static const struct IODATA vdd_off_data = {0x10, 0x20, 0x00}; |
39 | |
40 | u8 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(adap: plvds_chip_info->i2c_port, |
47 | slave_addr: plvds_chip_info->lvds_chip_slave_addr, index, pdata: &data); |
48 | return data; |
49 | } |
50 | |
51 | void 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(adap: plvds_chip_info->i2c_port, |
63 | slave_addr: plvds_chip_info->lvds_chip_slave_addr, index, data); |
64 | } |
65 | |
66 | void 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, io_data: 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, io_data: dual_channel_enable_data); |
81 | else |
82 | viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, |
83 | plvds_chip_info, io_data: 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, io_data: dithering_enable_data); |
88 | else |
89 | viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, |
90 | plvds_chip_info, io_data: dithering_disable_data); |
91 | } |
92 | |
93 | void 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 | io_data: vdd_on_data); |
99 | } |
100 | |
101 | void 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 | io_data: vdd_off_data); |
107 | } |
108 | |
109 | bool 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(adap: i2c_adapter, VT1636_LVDS_I2C_ADDR, |
121 | index: 0x00, pdata: &Buffer[0])) |
122 | return false; |
123 | viafb_i2c_readbyte(adap: i2c_adapter, VT1636_LVDS_I2C_ADDR, index: 0x01, pdata: &Buffer[1]); |
124 | |
125 | if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11))) |
126 | return false; |
127 | |
128 | /* Check Chip ID: */ |
129 | viafb_i2c_readbyte(adap: i2c_adapter, VT1636_LVDS_I2C_ADDR, index: 0x02, pdata: &Buffer[0]); |
130 | viafb_i2c_readbyte(adap: i2c_adapter, VT1636_LVDS_I2C_ADDR, index: 0x03, pdata: &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 | |
140 | static 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 | |
156 | static 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 | |
175 | void 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(Clk: plvds_setting_info->vclk); |
187 | viafb_set_dpa_gfx(output_interface: plvds_chip_info->output_interface, |
188 | p_gfx_dpa_setting: &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, p_vt1636_dpa_setting: pdpa); |
198 | } |
199 | |
200 | void 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(Clk: plvds_setting_info->vclk); |
211 | viafb_set_dpa_gfx(output_interface: plvds_chip_info->output_interface, |
212 | p_gfx_dpa_setting: &GFX_DPA_SETTING_TBL_VT3327[index]); |
213 | |
214 | /* LVDS Transmitter DPA settings: */ |
215 | set_dpa_vt1636(plvds_setting_info, plvds_chip_info, p_vt1636_dpa_setting: &dpa); |
216 | } |
217 | |
218 | void 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(Clk: plvds_setting_info->vclk); |
228 | viafb_set_dpa_gfx(output_interface: plvds_chip_info->output_interface, |
229 | p_gfx_dpa_setting: &GFX_DPA_SETTING_TBL_VT3364[index]); |
230 | } |
231 | |