2 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
3 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License as published by the Free Software Foundation;
8 * either version 2, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
12 * the implied warranty of MERCHANTABILITY or FITNESS FOR
13 * A PARTICULAR PURPOSE.See the GNU General Public License
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include <linux/via-core.h>
23 #include <linux/via_i2c.h>
26 u8
viafb_gpio_i2c_read_lvds(struct lvds_setting_information
27 *plvds_setting_info
, struct lvds_chip_information
*plvds_chip_info
,
32 viafb_i2c_readbyte(plvds_chip_info
->i2c_port
,
33 plvds_chip_info
->lvds_chip_slave_addr
, index
, &data
);
37 void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
38 *plvds_setting_info
, struct lvds_chip_information
39 *plvds_chip_info
, struct IODATA io_data
)
43 index
= io_data
.Index
;
44 data
= viafb_gpio_i2c_read_lvds(plvds_setting_info
, plvds_chip_info
,
46 data
= (data
& (~io_data
.Mask
)) | io_data
.Data
;
48 viafb_i2c_writebyte(plvds_chip_info
->i2c_port
,
49 plvds_chip_info
->lvds_chip_slave_addr
, index
, data
);
52 void viafb_init_lvds_vt1636(struct lvds_setting_information
53 *plvds_setting_info
, struct lvds_chip_information
*plvds_chip_info
)
57 /* Common settings: */
58 reg_num
= ARRAY_SIZE(COMMON_INIT_TBL_VT1636
);
60 for (i
= 0; i
< reg_num
; i
++) {
61 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
,
63 COMMON_INIT_TBL_VT1636
[i
]);
66 /* Input Data Mode Select */
67 if (plvds_setting_info
->device_lcd_dualedge
) {
68 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
,
70 DUAL_CHANNEL_ENABLE_TBL_VT1636
[0]);
72 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
,
74 SINGLE_CHANNEL_ENABLE_TBL_VT1636
[0]);
77 if (plvds_setting_info
->LCDDithering
) {
78 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
,
80 DITHERING_ENABLE_TBL_VT1636
[0]);
82 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
,
84 DITHERING_DISABLE_TBL_VT1636
[0]);
88 void viafb_enable_lvds_vt1636(struct lvds_setting_information
90 struct lvds_chip_information
*plvds_chip_info
)
93 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
, plvds_chip_info
,
94 VDD_ON_TBL_VT1636
[0]);
97 switch (plvds_chip_info
->output_interface
) {
100 viafb_write_reg_mask(SR1E
, VIASR
, 0xC0, 0xC0);
106 viafb_write_reg_mask(SR1E
, VIASR
, 0x30, 0x30);
110 case INTERFACE_DFP_LOW
:
112 viafb_write_reg_mask(SR2A
, VIASR
, 0x03, 0x03);
116 case INTERFACE_DFP_HIGH
:
118 viafb_write_reg_mask(SR2A
, VIASR
, 0x03, 0x0C);
125 void viafb_disable_lvds_vt1636(struct lvds_setting_information
127 struct lvds_chip_information
*plvds_chip_info
)
130 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
, plvds_chip_info
,
131 VDD_OFF_TBL_VT1636
[0]);
134 switch (plvds_chip_info
->output_interface
) {
137 viafb_write_reg_mask(SR1E
, VIASR
, 0x00, 0xC0);
143 viafb_write_reg_mask(SR1E
, VIASR
, 0x00, 0x30);
147 case INTERFACE_DFP_LOW
:
149 viafb_write_reg_mask(SR2A
, VIASR
, 0x00, 0x03);
153 case INTERFACE_DFP_HIGH
:
155 viafb_write_reg_mask(SR2A
, VIASR
, 0x00, 0x0C);
162 bool viafb_lvds_identify_vt1636(u8 i2c_adapter
)
166 DEBUG_MSG(KERN_INFO
"viafb_lvds_identify_vt1636.\n");
168 /* Sense VT1636 LVDS Transmiter */
169 viaparinfo
->chip_info
->lvds_chip_info
.lvds_chip_slave_addr
=
170 VT1636_LVDS_I2C_ADDR
;
172 /* Check vendor ID first: */
173 if (viafb_i2c_readbyte(i2c_adapter
, VT1636_LVDS_I2C_ADDR
,
176 viafb_i2c_readbyte(i2c_adapter
, VT1636_LVDS_I2C_ADDR
, 0x01, &Buffer
[1]);
178 if (!((Buffer
[0] == 0x06) && (Buffer
[1] == 0x11)))
182 viafb_i2c_readbyte(i2c_adapter
, VT1636_LVDS_I2C_ADDR
, 0x02, &Buffer
[0]);
183 viafb_i2c_readbyte(i2c_adapter
, VT1636_LVDS_I2C_ADDR
, 0x03, &Buffer
[1]);
184 if ((Buffer
[0] == 0x45) && (Buffer
[1] == 0x33)) {
185 viaparinfo
->chip_info
->lvds_chip_info
.lvds_chip_name
=
193 static int get_clk_range_index(u32 Clk
)
195 if (Clk
< DPA_CLK_30M
)
196 return DPA_CLK_RANGE_30M
;
197 else if (Clk
< DPA_CLK_50M
)
198 return DPA_CLK_RANGE_30_50M
;
199 else if (Clk
< DPA_CLK_70M
)
200 return DPA_CLK_RANGE_50_70M
;
201 else if (Clk
< DPA_CLK_100M
)
202 return DPA_CLK_RANGE_70_100M
;
203 else if (Clk
< DPA_CLK_150M
)
204 return DPA_CLK_RANGE_100_150M
;
206 return DPA_CLK_RANGE_150M
;
209 static int get_lvds_dpa_setting_index(int panel_size_id
,
210 struct VT1636_DPA_SETTING
*p_vt1636_dpasetting_tbl
,
215 for (i
= 0; i
< tbl_size
; i
++) {
216 if (panel_size_id
== p_vt1636_dpasetting_tbl
->PanelSizeID
)
219 p_vt1636_dpasetting_tbl
++;
225 static void set_dpa_vt1636(struct lvds_setting_information
226 *plvds_setting_info
, struct lvds_chip_information
*plvds_chip_info
,
227 struct VT1636_DPA_SETTING
*p_vt1636_dpa_setting
)
229 struct IODATA io_data
;
231 io_data
.Index
= 0x09;
233 io_data
.Data
= p_vt1636_dpa_setting
->CLK_SEL_ST1
;
234 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
,
235 plvds_chip_info
, io_data
);
237 io_data
.Index
= 0x08;
239 io_data
.Data
= p_vt1636_dpa_setting
->CLK_SEL_ST2
;
240 viafb_gpio_i2c_write_mask_lvds(plvds_setting_info
, plvds_chip_info
,
244 void viafb_vt1636_patch_skew_on_vt3324(
245 struct lvds_setting_information
*plvds_setting_info
,
246 struct lvds_chip_information
*plvds_chip_info
)
250 DEBUG_MSG(KERN_INFO
"viafb_vt1636_patch_skew_on_vt3324.\n");
252 /* Graphics DPA settings: */
253 index
= get_clk_range_index(plvds_setting_info
->vclk
);
254 viafb_set_dpa_gfx(plvds_chip_info
->output_interface
,
255 &GFX_DPA_SETTING_TBL_VT3324
[index
]);
257 /* LVDS Transmitter DPA settings: */
258 size
= ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3324
);
260 get_lvds_dpa_setting_index(plvds_setting_info
->lcd_panel_id
,
261 VT1636_DPA_SETTING_TBL_VT3324
, size
);
262 set_dpa_vt1636(plvds_setting_info
, plvds_chip_info
,
263 &VT1636_DPA_SETTING_TBL_VT3324
[index
]);
266 void viafb_vt1636_patch_skew_on_vt3327(
267 struct lvds_setting_information
*plvds_setting_info
,
268 struct lvds_chip_information
*plvds_chip_info
)
272 DEBUG_MSG(KERN_INFO
"viafb_vt1636_patch_skew_on_vt3327.\n");
274 /* Graphics DPA settings: */
275 index
= get_clk_range_index(plvds_setting_info
->vclk
);
276 viafb_set_dpa_gfx(plvds_chip_info
->output_interface
,
277 &GFX_DPA_SETTING_TBL_VT3327
[index
]);
279 /* LVDS Transmitter DPA settings: */
280 size
= ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3327
);
282 get_lvds_dpa_setting_index(plvds_setting_info
->lcd_panel_id
,
283 VT1636_DPA_SETTING_TBL_VT3327
, size
);
284 set_dpa_vt1636(plvds_setting_info
, plvds_chip_info
,
285 &VT1636_DPA_SETTING_TBL_VT3327
[index
]);
288 void viafb_vt1636_patch_skew_on_vt3364(
289 struct lvds_setting_information
*plvds_setting_info
,
290 struct lvds_chip_information
*plvds_chip_info
)
294 DEBUG_MSG(KERN_INFO
"viafb_vt1636_patch_skew_on_vt3364.\n");
296 /* Graphics DPA settings: */
297 index
= get_clk_range_index(plvds_setting_info
->vclk
);
298 viafb_set_dpa_gfx(plvds_chip_info
->output_interface
,
299 &GFX_DPA_SETTING_TBL_VT3364
[index
]);