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- /*
- * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
- * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation;
- * either version 2, or (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
- * the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE.See the GNU General Public License
- * for more details.
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include <linux/via-core.h>
- #include <linux/via_i2c.h>
- #include "global.h"
- static const struct IODATA common_init_data[] = {
- /* Index, Mask, Value */
- /* Set panel power sequence timing */
- {0x10, 0xC0, 0x00},
- /* T1: VDD on - Data on. Each increment is 1 ms. (50ms = 031h) */
- {0x0B, 0xFF, 0x40},
- /* T2: Data on - Backlight on. Each increment is 2 ms. (210ms = 068h) */
- {0x0C, 0xFF, 0x31},
- /* T3: Backlight off -Data off. Each increment is 2 ms. (210ms = 068h)*/
- {0x0D, 0xFF, 0x31},
- /* T4: Data off - VDD off. Each increment is 1 ms. (50ms = 031h) */
- {0x0E, 0xFF, 0x68},
- /* T5: VDD off - VDD on. Each increment is 100 ms. (500ms = 04h) */
- {0x0F, 0xFF, 0x68},
- /* LVDS output power up */
- {0x09, 0xA0, 0xA0},
- /* turn on back light */
- {0x10, 0x33, 0x13}
- };
- /* Index, Mask, Value */
- static const struct IODATA dual_channel_enable_data = {0x08, 0xF0, 0xE0};
- static const struct IODATA single_channel_enable_data = {0x08, 0xF0, 0x00};
- static const struct IODATA dithering_enable_data = {0x0A, 0x70, 0x50};
- static const struct IODATA dithering_disable_data = {0x0A, 0x70, 0x00};
- static const struct IODATA vdd_on_data = {0x10, 0x20, 0x20};
- static const struct IODATA vdd_off_data = {0x10, 0x20, 0x00};
- u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
- *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
- u8 index)
- {
- u8 data;
- viafb_i2c_readbyte(plvds_chip_info->i2c_port,
- plvds_chip_info->lvds_chip_slave_addr, index, &data);
- return data;
- }
- void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
- *plvds_setting_info, struct lvds_chip_information
- *plvds_chip_info, struct IODATA io_data)
- {
- int index, data;
- index = io_data.Index;
- data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
- index);
- data = (data & (~io_data.Mask)) | io_data.Data;
- viafb_i2c_writebyte(plvds_chip_info->i2c_port,
- plvds_chip_info->lvds_chip_slave_addr, index, data);
- }
- void viafb_init_lvds_vt1636(struct lvds_setting_information
- *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
- {
- int reg_num, i;
- /* Common settings: */
- reg_num = ARRAY_SIZE(common_init_data);
- for (i = 0; i < reg_num; i++)
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
- plvds_chip_info, common_init_data[i]);
- /* Input Data Mode Select */
- if (plvds_setting_info->device_lcd_dualedge)
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
- plvds_chip_info, dual_channel_enable_data);
- else
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
- plvds_chip_info, single_channel_enable_data);
- if (plvds_setting_info->LCDDithering)
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
- plvds_chip_info, dithering_enable_data);
- else
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
- plvds_chip_info, dithering_disable_data);
- }
- void viafb_enable_lvds_vt1636(struct lvds_setting_information
- *plvds_setting_info,
- struct lvds_chip_information *plvds_chip_info)
- {
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
- vdd_on_data);
- }
- void viafb_disable_lvds_vt1636(struct lvds_setting_information
- *plvds_setting_info,
- struct lvds_chip_information *plvds_chip_info)
- {
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
- vdd_off_data);
- }
- bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
- {
- u8 Buffer[2];
- DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
- /* Sense VT1636 LVDS Transmiter */
- viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
- VT1636_LVDS_I2C_ADDR;
- /* Check vendor ID first: */
- if (viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR,
- 0x00, &Buffer[0]))
- return false;
- viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x01, &Buffer[1]);
- if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
- return false;
- /* Check Chip ID: */
- viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x02, &Buffer[0]);
- viafb_i2c_readbyte(i2c_adapter, VT1636_LVDS_I2C_ADDR, 0x03, &Buffer[1]);
- if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
- viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
- VT1636_LVDS;
- return true;
- }
- return false;
- }
- static int get_clk_range_index(u32 Clk)
- {
- if (Clk < DPA_CLK_30M)
- return DPA_CLK_RANGE_30M;
- else if (Clk < DPA_CLK_50M)
- return DPA_CLK_RANGE_30_50M;
- else if (Clk < DPA_CLK_70M)
- return DPA_CLK_RANGE_50_70M;
- else if (Clk < DPA_CLK_100M)
- return DPA_CLK_RANGE_70_100M;
- else if (Clk < DPA_CLK_150M)
- return DPA_CLK_RANGE_100_150M;
- else
- return DPA_CLK_RANGE_150M;
- }
- static void set_dpa_vt1636(struct lvds_setting_information
- *plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
- struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
- {
- struct IODATA io_data;
- io_data.Index = 0x09;
- io_data.Mask = 0x1F;
- io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
- plvds_chip_info, io_data);
- io_data.Index = 0x08;
- io_data.Mask = 0x0F;
- io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
- viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
- io_data);
- }
- void viafb_vt1636_patch_skew_on_vt3324(
- struct lvds_setting_information *plvds_setting_info,
- struct lvds_chip_information *plvds_chip_info)
- {
- struct VT1636_DPA_SETTING dpa = {0x00, 0x00}, dpa_16x12 = {0x0B, 0x03},
- *pdpa;
- int index;
- DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
- /* Graphics DPA settings: */
- index = get_clk_range_index(plvds_setting_info->vclk);
- viafb_set_dpa_gfx(plvds_chip_info->output_interface,
- &GFX_DPA_SETTING_TBL_VT3324[index]);
- /* LVDS Transmitter DPA settings: */
- if (plvds_setting_info->lcd_panel_hres == 1600 &&
- plvds_setting_info->lcd_panel_vres == 1200)
- pdpa = &dpa_16x12;
- else
- pdpa = &dpa;
- set_dpa_vt1636(plvds_setting_info, plvds_chip_info, pdpa);
- }
- void viafb_vt1636_patch_skew_on_vt3327(
- struct lvds_setting_information *plvds_setting_info,
- struct lvds_chip_information *plvds_chip_info)
- {
- struct VT1636_DPA_SETTING dpa = {0x00, 0x00};
- int index;
- DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
- /* Graphics DPA settings: */
- index = get_clk_range_index(plvds_setting_info->vclk);
- viafb_set_dpa_gfx(plvds_chip_info->output_interface,
- &GFX_DPA_SETTING_TBL_VT3327[index]);
- /* LVDS Transmitter DPA settings: */
- set_dpa_vt1636(plvds_setting_info, plvds_chip_info, &dpa);
- }
- void viafb_vt1636_patch_skew_on_vt3364(
- struct lvds_setting_information *plvds_setting_info,
- struct lvds_chip_information *plvds_chip_info)
- {
- int index;
- DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
- /* Graphics DPA settings: */
- index = get_clk_range_index(plvds_setting_info->vclk);
- viafb_set_dpa_gfx(plvds_chip_info->output_interface,
- &GFX_DPA_SETTING_TBL_VT3364[index]);
- }
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