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linux/arch/arm/mach-pxa/corgi_lcd.c
Richard Purdie ca4d6cfcee [ARM] 4737/1: Refactor corgi_lcd to improve readability + bugfix 
This patch refactors the code in corgi_lcd.c moving it to the board
specific corgi and spitz files where appropriate instead of the
existing ifdef mess which hinders readability.

Fix spitz_get_hsync_len() to call get_hsync_invperiod so pxafb can be
compiled as a module.

The confusing variables which represent the inverse horizintal sync
period are renamed to "invperiod" consistently.

An incorrect comment in corgi_ts.c is also corrected.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-28 13:13:25 +00:00

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/*
* linux/arch/arm/mach-pxa/corgi_lcd.c
*
* Corgi/Spitz LCD Specific Code
*
* Copyright (C) 2005 Richard Purdie
*
* Connectivity:
* Corgi - LCD to ATI Imageon w100 (Wallaby)
* Spitz - LCD to PXA Framebuffer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/string.h>
#include <asm/arch/akita.h>
#include <asm/arch/corgi.h>
#include <asm/hardware.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/sharpsl.h>
#include <asm/arch/spitz.h>
#include <asm/hardware/scoop.h>
#include <asm/mach/sharpsl_param.h>
#include "generic.h"
/* Register Addresses */
#define RESCTL_ADRS 0x00
#define PHACTRL_ADRS 0x01
#define DUTYCTRL_ADRS 0x02
#define POWERREG0_ADRS 0x03
#define POWERREG1_ADRS 0x04
#define GPOR3_ADRS 0x05
#define PICTRL_ADRS 0x06
#define POLCTRL_ADRS 0x07
/* Register Bit Definitions */
#define RESCTL_QVGA 0x01
#define RESCTL_VGA 0x00
#define POWER1_VW_ON 0x01 /* VW Supply FET ON */
#define POWER1_GVSS_ON 0x02 /* GVSS(-8V) Power Supply ON */
#define POWER1_VDD_ON 0x04 /* VDD(8V),SVSS(-4V) Power Supply ON */
#define POWER1_VW_OFF 0x00 /* VW Supply FET OFF */
#define POWER1_GVSS_OFF 0x00 /* GVSS(-8V) Power Supply OFF */
#define POWER1_VDD_OFF 0x00 /* VDD(8V),SVSS(-4V) Power Supply OFF */
#define POWER0_COM_DCLK 0x01 /* COM Voltage DC Bias DAC Serial Data Clock */
#define POWER0_COM_DOUT 0x02 /* COM Voltage DC Bias DAC Serial Data Out */
#define POWER0_DAC_ON 0x04 /* DAC Power Supply ON */
#define POWER0_COM_ON 0x08 /* COM Power Supply ON */
#define POWER0_VCC5_ON 0x10 /* VCC5 Power Supply ON */
#define POWER0_DAC_OFF 0x00 /* DAC Power Supply OFF */
#define POWER0_COM_OFF 0x00 /* COM Power Supply OFF */
#define POWER0_VCC5_OFF 0x00 /* VCC5 Power Supply OFF */
#define PICTRL_INIT_STATE 0x01
#define PICTRL_INIOFF 0x02
#define PICTRL_POWER_DOWN 0x04
#define PICTRL_COM_SIGNAL_OFF 0x08
#define PICTRL_DAC_SIGNAL_OFF 0x10
#define POLCTRL_SYNC_POL_FALL 0x01
#define POLCTRL_EN_POL_FALL 0x02
#define POLCTRL_DATA_POL_FALL 0x04
#define POLCTRL_SYNC_ACT_H 0x08
#define POLCTRL_EN_ACT_L 0x10
#define POLCTRL_SYNC_POL_RISE 0x00
#define POLCTRL_EN_POL_RISE 0x00
#define POLCTRL_DATA_POL_RISE 0x00
#define POLCTRL_SYNC_ACT_L 0x00
#define POLCTRL_EN_ACT_H 0x00
#define PHACTRL_PHASE_MANUAL 0x01
#define DEFAULT_PHAD_QVGA (9)
#define DEFAULT_COMADJ (125)
/*
* This is only a psuedo I2C interface. We can't use the standard kernel
* routines as the interface is write only. We just assume the data is acked...
*/
static void lcdtg_ssp_i2c_send(u8 data)
{
corgi_ssp_lcdtg_send(POWERREG0_ADRS, data);
udelay(10);
}
static void lcdtg_i2c_send_bit(u8 data)
{
lcdtg_ssp_i2c_send(data);
lcdtg_ssp_i2c_send(data | POWER0_COM_DCLK);
lcdtg_ssp_i2c_send(data);
}
static void lcdtg_i2c_send_start(u8 base)
{
lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK | POWER0_COM_DOUT);
lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK);
lcdtg_ssp_i2c_send(base);
}
static void lcdtg_i2c_send_stop(u8 base)
{
lcdtg_ssp_i2c_send(base);
lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK);
lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK | POWER0_COM_DOUT);
}
static void lcdtg_i2c_send_byte(u8 base, u8 data)
{
int i;
for (i = 0; i < 8; i++) {
if (data & 0x80)
lcdtg_i2c_send_bit(base | POWER0_COM_DOUT);
else
lcdtg_i2c_send_bit(base);
data <<= 1;
}
}
static void lcdtg_i2c_wait_ack(u8 base)
{
lcdtg_i2c_send_bit(base);
}
static void lcdtg_set_common_voltage(u8 base_data, u8 data)
{
/* Set Common Voltage to M62332FP via I2C */
lcdtg_i2c_send_start(base_data);
lcdtg_i2c_send_byte(base_data, 0x9c);
lcdtg_i2c_wait_ack(base_data);
lcdtg_i2c_send_byte(base_data, 0x00);
lcdtg_i2c_wait_ack(base_data);
lcdtg_i2c_send_byte(base_data, data);
lcdtg_i2c_wait_ack(base_data);
lcdtg_i2c_send_stop(base_data);
}
/* Set Phase Adjust */
static void lcdtg_set_phadadj(int mode)
{
int adj;
switch(mode) {
case 480:
case 640:
/* Setting for VGA */
adj = sharpsl_param.phadadj;
if (adj < 0) {
adj = PHACTRL_PHASE_MANUAL;
} else {
adj = ((adj & 0x0f) << 1) | PHACTRL_PHASE_MANUAL;
}
break;
case 240:
case 320:
default:
/* Setting for QVGA */
adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL;
break;
}
corgi_ssp_lcdtg_send(PHACTRL_ADRS, adj);
}
static int lcd_inited;
void corgi_lcdtg_hw_init(int mode)
{
if (!lcd_inited) {
int comadj;
/* Initialize Internal Logic & Port */
corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_POWER_DOWN | PICTRL_INIOFF | PICTRL_INIT_STATE
| PICTRL_COM_SIGNAL_OFF | PICTRL_DAC_SIGNAL_OFF);
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF
| POWER0_COM_OFF | POWER0_VCC5_OFF);
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
/* VDD(+8V), SVSS(-4V) ON */
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
mdelay(3);
/* DAC ON */
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON
| POWER0_COM_OFF | POWER0_VCC5_OFF);
/* INIB = H, INI = L */
/* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */
corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF);
/* Set Common Voltage */
comadj = sharpsl_param.comadj;
if (comadj < 0)
comadj = DEFAULT_COMADJ;
lcdtg_set_common_voltage((POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF), comadj);
/* VCC5 ON, DAC ON */
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
POWER0_COM_OFF | POWER0_VCC5_ON);
/* GVSS(-8V) ON, VDD ON */
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
mdelay(2);
/* COM SIGNAL ON (PICTL[3] = L) */
corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_INIT_STATE);
/* COM ON, DAC ON, VCC5_ON */
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON
| POWER0_COM_ON | POWER0_VCC5_ON);
/* VW ON, GVSS ON, VDD ON */
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON);
/* Signals output enable */
corgi_ssp_lcdtg_send(PICTRL_ADRS, 0);
/* Set Phase Adjust */
lcdtg_set_phadadj(mode);
/* Initialize for Input Signals from ATI */
corgi_ssp_lcdtg_send(POLCTRL_ADRS, POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE
| POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L | POLCTRL_EN_ACT_H);
udelay(1000);
lcd_inited=1;
} else {
lcdtg_set_phadadj(mode);
}
switch(mode) {
case 480:
case 640:
/* Set Lcd Resolution (VGA) */
corgi_ssp_lcdtg_send(RESCTL_ADRS, RESCTL_VGA);
break;
case 240:
case 320:
default:
/* Set Lcd Resolution (QVGA) */
corgi_ssp_lcdtg_send(RESCTL_ADRS, RESCTL_QVGA);
break;
}
}
void corgi_lcdtg_suspend(void)
{
/* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */
mdelay(34);
/* (1)VW OFF */
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
/* (2)COM OFF */
corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF);
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON);
/* (3)Set Common Voltage Bias 0V */
lcdtg_set_common_voltage(POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON, 0);
/* (4)GVSS OFF */
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
/* (5)VCC5 OFF */
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF);
/* (6)Set PDWN, INIOFF, DACOFF */
corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF |
PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF);
/* (7)DAC OFF */
corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF);
/* (8)VDD OFF */
corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
lcd_inited = 0;
}
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