Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / 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
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(plvds_chip_info->i2c_port,
47                            plvds_chip_info->lvds_chip_slave_addr, index, &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(plvds_chip_info->i2c_port,
63                             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, 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
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                 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                 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(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
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(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
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(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
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(plvds_setting_info->vclk);
228         viafb_set_dpa_gfx(plvds_chip_info->output_interface,
229                     &GFX_DPA_SETTING_TBL_VT3364[index]);
230 }