277d32a36c
This patch changes the way how the various I2C busses are used internally
inside the viafb driver: Previosuly, only a single i2c_adapter was created,
even though two different hardware I2C busses are accessed: A structure member
in a global variable was modified to indicate the bus to be used.
Now, all existing hardware busses are registered with the i2c core, and the
viafb_i2c_{read,write}byte[s]() function take the adapter number as function
call parameter, rather than referring to the global structure member.
[jc: even more painful merge with mainline changes ->2.6.34]
[jc: painful merge with OLPC changes]
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: ScottFang@viatech.com.cn
Cc: JosephChan@via.com.tw
Signed-off-by: Harald Welte <HaraldWelte@viatech.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
305 lines
7.9 KiB
C
305 lines
7.9 KiB
C
/*
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* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
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* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation;
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* either version 2, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE.See the GNU General Public License
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* for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "global.h"
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u8 viafb_gpio_i2c_read_lvds(struct lvds_setting_information
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*plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
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u8 index)
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{
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u8 data;
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viafb_i2c_readbyte(plvds_chip_info->i2c_port,
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plvds_chip_info->lvds_chip_slave_addr, index, &data);
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return data;
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}
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void viafb_gpio_i2c_write_mask_lvds(struct lvds_setting_information
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*plvds_setting_info, struct lvds_chip_information
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*plvds_chip_info, struct IODATA io_data)
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{
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int index, data;
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index = io_data.Index;
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data = viafb_gpio_i2c_read_lvds(plvds_setting_info, plvds_chip_info,
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index);
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data = (data & (~io_data.Mask)) | io_data.Data;
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viafb_i2c_writebyte(plvds_chip_info->i2c_port,
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plvds_chip_info->lvds_chip_slave_addr, index, data);
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}
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void viafb_init_lvds_vt1636(struct lvds_setting_information
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*plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
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{
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int reg_num, i;
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/* Common settings: */
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reg_num = ARRAY_SIZE(COMMON_INIT_TBL_VT1636);
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for (i = 0; i < reg_num; i++) {
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
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plvds_chip_info,
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COMMON_INIT_TBL_VT1636[i]);
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}
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/* Input Data Mode Select */
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if (plvds_setting_info->device_lcd_dualedge) {
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
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plvds_chip_info,
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DUAL_CHANNEL_ENABLE_TBL_VT1636[0]);
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} else {
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
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plvds_chip_info,
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SINGLE_CHANNEL_ENABLE_TBL_VT1636[0]);
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}
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if (plvds_setting_info->LCDDithering) {
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
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plvds_chip_info,
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DITHERING_ENABLE_TBL_VT1636[0]);
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} else {
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
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plvds_chip_info,
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DITHERING_DISABLE_TBL_VT1636[0]);
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}
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}
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void viafb_enable_lvds_vt1636(struct lvds_setting_information
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*plvds_setting_info,
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struct lvds_chip_information *plvds_chip_info)
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{
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
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VDD_ON_TBL_VT1636[0]);
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/* Pad on: */
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switch (plvds_chip_info->output_interface) {
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case INTERFACE_DVP0:
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{
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viafb_write_reg_mask(SR1E, VIASR, 0xC0, 0xC0);
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break;
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}
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case INTERFACE_DVP1:
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{
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viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
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break;
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}
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case INTERFACE_DFP_LOW:
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{
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viafb_write_reg_mask(SR2A, VIASR, 0x03, 0x03);
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break;
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}
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case INTERFACE_DFP_HIGH:
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{
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viafb_write_reg_mask(SR2A, VIASR, 0x03, 0x0C);
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break;
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}
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}
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}
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void viafb_disable_lvds_vt1636(struct lvds_setting_information
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*plvds_setting_info,
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struct lvds_chip_information *plvds_chip_info)
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{
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
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VDD_OFF_TBL_VT1636[0]);
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/* Pad off: */
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switch (plvds_chip_info->output_interface) {
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case INTERFACE_DVP0:
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{
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viafb_write_reg_mask(SR1E, VIASR, 0x00, 0xC0);
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break;
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}
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case INTERFACE_DVP1:
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{
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viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
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break;
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}
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case INTERFACE_DFP_LOW:
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{
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viafb_write_reg_mask(SR2A, VIASR, 0x00, 0x03);
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break;
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}
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case INTERFACE_DFP_HIGH:
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{
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viafb_write_reg_mask(SR2A, VIASR, 0x00, 0x0C);
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break;
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}
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}
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}
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bool viafb_lvds_identify_vt1636(u8 i2c_adapter)
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{
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u8 Buffer[2];
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DEBUG_MSG(KERN_INFO "viafb_lvds_identify_vt1636.\n");
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/* Sense VT1636 LVDS Transmiter */
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viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
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VT1636_LVDS_I2C_ADDR;
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/* Check vendor ID first: */
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viafb_i2c_readbyte(i2c_adapter,
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(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
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0x00, &Buffer[0]);
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viafb_i2c_readbyte(i2c_adapter,
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(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
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0x01, &Buffer[1]);
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if (!((Buffer[0] == 0x06) && (Buffer[1] == 0x11)))
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return false;
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/* Check Chip ID: */
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viafb_i2c_readbyte(i2c_adapter,
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(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
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0x02, &Buffer[0]);
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viafb_i2c_readbyte(i2c_adapter,
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(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
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0x03, &Buffer[1]);
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if ((Buffer[0] == 0x45) && (Buffer[1] == 0x33)) {
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viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
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VT1636_LVDS;
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return true;
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}
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return false;
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}
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static int get_clk_range_index(u32 Clk)
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{
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if (Clk < DPA_CLK_30M)
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return DPA_CLK_RANGE_30M;
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else if (Clk < DPA_CLK_50M)
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return DPA_CLK_RANGE_30_50M;
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else if (Clk < DPA_CLK_70M)
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return DPA_CLK_RANGE_50_70M;
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else if (Clk < DPA_CLK_100M)
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return DPA_CLK_RANGE_70_100M;
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else if (Clk < DPA_CLK_150M)
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return DPA_CLK_RANGE_100_150M;
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else
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return DPA_CLK_RANGE_150M;
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}
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static int get_lvds_dpa_setting_index(int panel_size_id,
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struct VT1636_DPA_SETTING *p_vt1636_dpasetting_tbl,
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int tbl_size)
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{
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int i;
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for (i = 0; i < tbl_size; i++) {
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if (panel_size_id == p_vt1636_dpasetting_tbl->PanelSizeID)
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return i;
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p_vt1636_dpasetting_tbl++;
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}
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return 0;
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}
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static void set_dpa_vt1636(struct lvds_setting_information
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*plvds_setting_info, struct lvds_chip_information *plvds_chip_info,
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struct VT1636_DPA_SETTING *p_vt1636_dpa_setting)
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{
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struct IODATA io_data;
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io_data.Index = 0x09;
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io_data.Mask = 0x1F;
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io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST1;
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info,
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plvds_chip_info, io_data);
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io_data.Index = 0x08;
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io_data.Mask = 0x0F;
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io_data.Data = p_vt1636_dpa_setting->CLK_SEL_ST2;
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viafb_gpio_i2c_write_mask_lvds(plvds_setting_info, plvds_chip_info,
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io_data);
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}
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void viafb_vt1636_patch_skew_on_vt3324(
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struct lvds_setting_information *plvds_setting_info,
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struct lvds_chip_information *plvds_chip_info)
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{
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int index, size;
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DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3324.\n");
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/* Graphics DPA settings: */
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index = get_clk_range_index(plvds_setting_info->vclk);
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viafb_set_dpa_gfx(plvds_chip_info->output_interface,
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&GFX_DPA_SETTING_TBL_VT3324[index]);
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/* LVDS Transmitter DPA settings: */
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size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3324);
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index =
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get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
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VT1636_DPA_SETTING_TBL_VT3324, size);
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set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
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&VT1636_DPA_SETTING_TBL_VT3324[index]);
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}
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void viafb_vt1636_patch_skew_on_vt3327(
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struct lvds_setting_information *plvds_setting_info,
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struct lvds_chip_information *plvds_chip_info)
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{
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int index, size;
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DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3327.\n");
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/* Graphics DPA settings: */
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index = get_clk_range_index(plvds_setting_info->vclk);
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viafb_set_dpa_gfx(plvds_chip_info->output_interface,
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&GFX_DPA_SETTING_TBL_VT3327[index]);
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/* LVDS Transmitter DPA settings: */
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size = ARRAY_SIZE(VT1636_DPA_SETTING_TBL_VT3327);
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index =
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get_lvds_dpa_setting_index(plvds_setting_info->lcd_panel_id,
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VT1636_DPA_SETTING_TBL_VT3327, size);
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set_dpa_vt1636(plvds_setting_info, plvds_chip_info,
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&VT1636_DPA_SETTING_TBL_VT3327[index]);
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}
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void viafb_vt1636_patch_skew_on_vt3364(
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struct lvds_setting_information *plvds_setting_info,
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struct lvds_chip_information *plvds_chip_info)
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{
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int index;
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DEBUG_MSG(KERN_INFO "viafb_vt1636_patch_skew_on_vt3364.\n");
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/* Graphics DPA settings: */
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index = get_clk_range_index(plvds_setting_info->vclk);
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viafb_set_dpa_gfx(plvds_chip_info->output_interface,
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&GFX_DPA_SETTING_TBL_VT3364[index]);
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}
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