/*
* 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 void tmds_register_write(int index, u8 data);
static int tmds_register_read(int index);
static int tmds_register_read_bytes(int index, u8 *buff, int buff_len);
static void dvi_get_panel_size_from_DDCv1(
struct tmds_chip_information *tmds_chip,
struct tmds_setting_information *tmds_setting);
static int viafb_dvi_query_EDID(void);
static inline bool check_tmds_chip(int device_id_subaddr, int device_id)
{
return tmds_register_read(device_id_subaddr) == device_id;
}
void viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
struct tmds_setting_information *tmds_setting)
{
DEBUG_MSG(KERN_INFO "viafb_init_dvi_size()\n");
viafb_dvi_sense();
if (viafb_dvi_query_EDID() == 1)
dvi_get_panel_size_from_DDCv1(tmds_chip, tmds_setting);
return;
}
bool viafb_tmds_trasmitter_identify(void)
{
unsigned char sr2a = 0, sr1e = 0, sr3e = 0;
/* Turn on ouputting pad */
switch (viaparinfo->chip_info->gfx_chip_name) {
case UNICHROME_K8M890:
/*=* DFP Low Pad on *=*/
sr2a = viafb_read_reg(VIASR, SR2A);
viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
break;
case UNICHROME_P4M900:
case UNICHROME_P4M890:
/* DFP Low Pad on */
sr2a = viafb_read_reg(VIASR, SR2A);
viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
/* DVP0 Pad on */
sr1e = viafb_read_reg(VIASR, SR1E);
viafb_write_reg_mask(SR1E, VIASR, 0xC0, BIT6 + BIT7);
break;
default:
/* DVP0/DVP1 Pad on */
sr1e = viafb_read_reg(VIASR, SR1E);
viafb_write_reg_mask(SR1E, VIASR, 0xF0, BIT4 +
BIT5 + BIT6 + BIT7);
/* SR3E[1]Multi-function selection:
0 = Emulate I2C and DDC bus by GPIO2/3/4. */
sr3e = viafb_read_reg(VIASR, SR3E);
viafb_write_reg_mask(SR3E, VIASR, 0x0, BIT5);
break;
}
/* Check for VT1632: */
viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = VT1632_TMDS;
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_31;
if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
/*
* Currently only support 12bits,dual edge,add 24bits mode later
*/
tmds_register_write(0x08, 0x3b);
DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
DEBUG_MSG(KERN_INFO "\n %2d",
viaparinfo->chip_info->tmds_chip_info.tmds_chip_name);
DEBUG_MSG(KERN_INFO "\n %2d",
viaparinfo->chip_info->tmds_chip_info.i2c_port);
return true;
} else {
viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_2C;
if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
tmds_register_write(0x08, 0x3b);
DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
DEBUG_MSG(KERN_INFO "\n %2d",
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_name);
DEBUG_MSG(KERN_INFO "\n %2d",
viaparinfo->chip_info->
tmds_chip_info.i2c_port);
return true;
}
}
viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = INTEGRATED_TMDS;
if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) &&
((viafb_display_hardware_layout == HW_LAYOUT_DVI_ONLY) ||
(viafb_display_hardware_layout == HW_LAYOUT_LCD_DVI))) {
DEBUG_MSG(KERN_INFO "\n Integrated TMDS ! \n");
return true;
}
switch (viaparinfo->chip_info->gfx_chip_name) {
case UNICHROME_K8M890:
viafb_write_reg(SR2A, VIASR, sr2a);
break;
case UNICHROME_P4M900:
case UNICHROME_P4M890:
viafb_write_reg(SR2A, VIASR, sr2a);
viafb_write_reg(SR1E, VIASR, sr1e);
break;
default:
viafb_write_reg(SR1E, VIASR, sr1e);
viafb_write_reg(SR3E, VIASR, sr3e);
break;
}
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_name = NON_TMDS_TRANSMITTER;
viaparinfo->chip_info->tmds_chip_info.
tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
return false;
}
static void tmds_register_write(int index, u8 data)
{
viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
index, data);
}
static int tmds_register_read(int index)
{
u8 data;
viafb_i2c_readbyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
(u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
(u8) index, &data);
return data;
}
static int tmds_register_read_bytes(int index, u8 *buff, int buff_len)
{
viafb_i2c_readbytes(viaparinfo->chip_info->tmds_chip_info.i2c_port,
(u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
(u8) index, buff, buff_len);
return 0;
}
/* DVI Set Mode */
void viafb_dvi_set_mode(const struct fb_var_screeninfo *var,
u16 cxres, u16 cyres, int iga)
{
struct fb_var_screeninfo dvi_var = *var;
const struct fb_videomode *rb_mode;
int maxPixelClock;
maxPixelClock = viaparinfo->shared->tmds_setting_info.max_pixel_clock;
if (maxPixelClock && PICOS2KHZ(var->pixclock) / 1000 > maxPixelClock) {
rb_mode = viafb_get_best_rb_mode(var->xres, var->yres, 60);
if (rb_mode)
viafb_fill_var_timing_info(&dvi_var, rb_mode);
}
viafb_fill_crtc_timing(&dvi_var, cxres, cyres, iga);
}
/* Sense DVI Connector */
int viafb_dvi_sense(void)
{
u8 RegSR1E = 0, RegSR3E = 0, RegCR6B = 0, RegCR91 = 0,
RegCR93 = 0, RegCR9B = 0, data;
int ret = false;
DEBUG_MSG(KERN_INFO "viafb_dvi_sense!!\n");
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
/* DI1 Pad on */
RegSR1E = viafb_read_reg(VIASR, SR1E);
viafb_write_reg(SR1E, VIASR, RegSR1E | 0x30);
/* CR6B[0]VCK Input Selection: 1 = External clock. */
RegCR6B = viafb_read_reg(VIACR, CR6B);
viafb_write_reg(CR6B, VIACR, RegCR6B | 0x08);
/* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
[0] Software Control Power Sequence */
RegCR91 = viafb_read_reg(VIACR, CR91);
viafb_write_reg(CR91, VIACR, 0x1D);
/* CR93[7] DI1 Data Source Selection: 1 = DSP2.
CR93[5] DI1 Clock Source: 1 = internal.
CR93[4] DI1 Clock Polarity.
CR93[3:1] DI1 Clock Adjust. CR93[0] DI1 enable */
RegCR93 = viafb_read_reg(VIACR, CR93);
viafb_write_reg(CR93, VIACR, 0x01);
} else {
/* DVP0/DVP1 Pad on */
RegSR1E = viafb_read_reg(VIASR, SR1E);
viafb_write_reg(SR1E, VIASR, RegSR1E | 0xF0);
/* SR3E[1]Multi-function selection:
0 = Emulate I2C and DDC bus by GPIO2/3/4. */
RegSR3E = viafb_read_reg(VIASR, SR3E);
viafb_write_reg(SR3E, VIASR, RegSR3E & (~0x20));
/* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
[0] Software Control Power Sequence */
RegCR91 = viafb_read_reg(VIACR, CR91);
viafb_write_reg(CR91, VIACR, 0x1D);
/*CR9B[4] DVP1 Data Source Selection: 1 = From secondary
display.CR9B[2:0] DVP1 Clock Adjust */
RegCR9B = viafb_read_reg(VIACR, CR9B);
viafb_write_reg(CR9B, VIACR, 0x01);
}
data = (u8) tmds_register_read(0x09);
if (data & 0x04)
ret = true;
if (ret == false) {
if (viafb_dvi_query_EDID())
ret = true;
}
/* Restore status */
viafb_write_reg(SR1E, VIASR, RegSR1E);
viafb_write_reg(CR91, VIACR, RegCR91);
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
viafb_write_reg(CR6B, VIACR, RegCR6B);
viafb_write_reg(CR93, VIACR, RegCR93);
} else {
viafb_write_reg(SR3E, VIASR, RegSR3E);
viafb_write_reg(CR9B, VIACR, RegCR9B);
}
return ret;
}
/* Query Flat Panel's EDID Table Version Through DVI Connector */
static int viafb_dvi_query_EDID(void)
{
u8 data0, data1;
int restore;
DEBUG_MSG(KERN_INFO "viafb_dvi_query_EDID!!\n");
restore = viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr;
viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr = 0xA0;
data0 = (u8) tmds_register_read(0x00);
data1 = (u8) tmds_register_read(0x01);
if ((data0 == 0) && (data1 == 0xFF)) {
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_slave_addr = restore;
return EDID_VERSION_1; /* Found EDID1 Table */
}
return false;
}
/* Get Panel Size Using EDID1 Table */
static void dvi_get_panel_size_from_DDCv1(
struct tmds_chip_information *tmds_chip,
struct tmds_setting_information *tmds_setting)
{
int i, restore;
unsigned char EDID_DATA[18];
DEBUG_MSG(KERN_INFO "\n dvi_get_panel_size_from_DDCv1 \n");
restore = tmds_chip->tmds_chip_slave_addr;
tmds_chip->tmds_chip_slave_addr = 0xA0;
for (i = 0x25; i < 0x6D; i++) {
switch (i) {
case 0x36:
case 0x48:
case 0x5A:
case 0x6C:
tmds_register_read_bytes(i, EDID_DATA, 10);
if (!(EDID_DATA[0] || EDID_DATA[1])) {
/* The first two byte must be zero. */
if (EDID_DATA[3] == 0xFD) {
/* To get max pixel clock. */
tmds_setting->max_pixel_clock =
EDID_DATA[9] * 10;
}
}
break;
default:
break;
}
}
DEBUG_MSG(KERN_INFO "DVI max pixelclock = %d\n",
tmds_setting->max_pixel_clock);
tmds_chip->tmds_chip_slave_addr = restore;
}
/* If Disable DVI, turn off pad */
void viafb_dvi_disable(void)
{
if (viaparinfo->chip_info->
tmds_chip_info.output_interface == INTERFACE_TMDS)
/* Turn off TMDS power. */
viafb_write_reg(CRD2, VIACR,
viafb_read_reg(VIACR, CRD2) | 0x08);
}
static void dvi_patch_skew_dvp0(void)
{
/* Reset data driving first: */
viafb_write_reg_mask(SR1B, VIASR, 0, BIT1);
viafb_write_reg_mask(SR2A, VIASR, 0, BIT4);
switch (viaparinfo->chip_info->gfx_chip_name) {
case UNICHROME_P4M890:
{
if ((viaparinfo->tmds_setting_info->h_active == 1600) &&
(viaparinfo->tmds_setting_info->v_active ==
1200))
viafb_write_reg_mask(CR96, VIACR, 0x03,
BIT0 + BIT1 + BIT2);
else
viafb_write_reg_mask(CR96, VIACR, 0x07,
BIT0 + BIT1 + BIT2);
break;
}
case UNICHROME_P4M900:
{
viafb_write_reg_mask(CR96, VIACR, 0x07,
BIT0 + BIT1 + BIT2 + BIT3);
viafb_write_reg_mask(SR1B, VIASR, 0x02, BIT1);
viafb_write_reg_mask(SR2A, VIASR, 0x10, BIT4);
break;
}
default:
{
break;
}
}
}
static void dvi_patch_skew_dvp_low(void)
{
switch (viaparinfo->chip_info->gfx_chip_name) {
case UNICHROME_K8M890:
{
viafb_write_reg_mask(CR99, VIACR, 0x03, BIT0 + BIT1);
break;
}
case UNICHROME_P4M900:
{
viafb_write_reg_mask(CR99, VIACR, 0x08,
BIT0 + BIT1 + BIT2 + BIT3);
break;
}
case UNICHROME_P4M890:
{
viafb_write_reg_mask(CR99, VIACR, 0x0F,
BIT0 + BIT1 + BIT2 + BIT3);
break;
}
default:
{
break;
}
}
}
/* If Enable DVI, turn off pad */
void viafb_dvi_enable(void)
{
u8 data;
switch (viaparinfo->chip_info->tmds_chip_info.output_interface) {
case INTERFACE_DVP0:
viafb_write_reg_mask(CR6B, VIACR, 0x01, BIT0);
viafb_write_reg_mask(CR6C, VIACR, 0x21, BIT0 + BIT5);
dvi_patch_skew_dvp0();
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
tmds_register_write(0x88, 0x3b);
else
/*clear CR91[5] to direct on display period
in the secondary diplay path */
via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
break;
case INTERFACE_DVP1:
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
viafb_write_reg_mask(CR93, VIACR, 0x21, BIT0 + BIT5);
/*fix dvi cann't be enabled with MB VT5718C4 - Al Zhang */
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
tmds_register_write(0x88, 0x3b);
else
/*clear CR91[5] to direct on display period
in the secondary diplay path */
via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
/*fix DVI cannot enable on EPIA-M board */
if (viafb_platform_epia_dvi == 1) {
viafb_write_reg_mask(CR91, VIACR, 0x1f, 0x1f);
viafb_write_reg_mask(CR88, VIACR, 0x00, BIT6 + BIT0);
if (viafb_bus_width == 24) {
if (viafb_device_lcd_dualedge == 1)
data = 0x3F;
else
data = 0x37;
viafb_i2c_writebyte(viaparinfo->chip_info->
tmds_chip_info.i2c_port,
viaparinfo->chip_info->
tmds_chip_info.tmds_chip_slave_addr,
0x08, data);
}
}
break;
case INTERFACE_DFP_HIGH:
if (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
via_write_reg_mask(VIACR, CR97, 0x03, 0x03);
via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
break;
case INTERFACE_DFP_LOW:
if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
break;
dvi_patch_skew_dvp_low();
via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
break;
case INTERFACE_TMDS:
/* Turn on Display period in the panel path. */
viafb_write_reg_mask(CR91, VIACR, 0, BIT7);
/* Turn on TMDS power. */
viafb_write_reg_mask(CRD2, VIACR, 0, BIT3);
break;
}
if (viaparinfo->tmds_setting_info->iga_path == IGA2) {
/* Disable LCD Scaling */
viafb_write_reg_mask(CR79, VIACR, 0x00, BIT0);
}
}