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/*
* Copyright 2014 Freescale Semiconductor, Inc.
* Author: Priyanka Jain <Priyanka.Jain@freescale.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <asm/io.h>
#include <stdio_dev.h>
#include <video_fb.h>
#include <fsl_diu_fb.h>
#include "../common/qixis.h"
#include "t1040qds.h"
#include "t1040qds_qixis.h"
#include <i2c.h>
#define I2C_DVI_INPUT_DATA_FORMAT_REG 0x1F
#define I2C_DVI_PLL_CHARGE_CNTL_REG 0x33
#define I2C_DVI_PLL_DIVIDER_REG 0x34
#define I2C_DVI_PLL_SUPPLY_CNTL_REG 0x35
#define I2C_DVI_PLL_FILTER_REG 0x36
#define I2C_DVI_TEST_PATTERN_REG 0x48
#define I2C_DVI_POWER_MGMT_REG 0x49
#define I2C_DVI_LOCK_STATE_REG 0x4D
#define I2C_DVI_SYNC_POLARITY_REG 0x56
/*
* Set VSYNC/HSYNC to active high. This is polarity of sync signals
* from DIU->DVI. The DIU default is active igh, so DVI is set to
* active high.
*/
#define I2C_DVI_INPUT_DATA_FORMAT_VAL 0x98
#define I2C_DVI_PLL_CHARGE_CNTL_HIGH_SPEED_VAL 0x06
#define I2C_DVI_PLL_DIVIDER_HIGH_SPEED_VAL 0x26
#define I2C_DVI_PLL_FILTER_HIGH_SPEED_VAL 0xA0
#define I2C_DVI_PLL_CHARGE_CNTL_LOW_SPEED_VAL 0x08
#define I2C_DVI_PLL_DIVIDER_LOW_SPEED_VAL 0x16
#define I2C_DVI_PLL_FILTER_LOW_SPEED_VAL 0x60
/* Clear test pattern */
#define I2C_DVI_TEST_PATTERN_VAL 0x18
/* Exit Power-down mode */
#define I2C_DVI_POWER_MGMT_VAL 0xC0
/* Monitor polarity is handled via DVI Sync Polarity Register */
#define I2C_DVI_SYNC_POLARITY_VAL 0x00
/*
* DIU Area Descriptor
*
* Note that we need to byte-swap the value before it's written to the AD
* register. So even though the registers don't look like they're in the same
* bit positions as they are on the MPC8610, the same value is written to the
* AD register on the MPC8610 and on the P1022.
*/
#define AD_BYTE_F 0x10000000
#define AD_ALPHA_C_SHIFT 25
#define AD_BLUE_C_SHIFT 23
#define AD_GREEN_C_SHIFT 21
#define AD_RED_C_SHIFT 19
#define AD_PIXEL_S_SHIFT 16
#define AD_COMP_3_SHIFT 12
#define AD_COMP_2_SHIFT 8
#define AD_COMP_1_SHIFT 4
#define AD_COMP_0_SHIFT 0
/* Programming of HDMI Chrontel CH7301 connector */
int diu_set_dvi_encoder(unsigned int pixclock)
{
int ret;
u8 temp;
select_i2c_ch_pca9547(I2C_MUX_CH_DIU);
temp = I2C_DVI_TEST_PATTERN_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_TEST_PATTERN_REG, 1,
&temp, 1);
if (ret) {
puts("I2C: failed to select proper dvi test pattern\n");
return ret;
}
temp = I2C_DVI_INPUT_DATA_FORMAT_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_INPUT_DATA_FORMAT_REG,
1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi input data format\n");
return ret;
}
/* Set Sync polarity register */
temp = I2C_DVI_SYNC_POLARITY_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_SYNC_POLARITY_REG, 1,
&temp, 1);
if (ret) {
puts("I2C: failed to select dvi syc polarity\n");
return ret;
}
/* Set PLL registers based on pixel clock rate*/
if (pixclock > 65000000) {
temp = I2C_DVI_PLL_CHARGE_CNTL_HIGH_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_CHARGE_CNTL_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll charge_cntl\n");
return ret;
}
temp = I2C_DVI_PLL_DIVIDER_HIGH_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_DIVIDER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll divider\n");
return ret;
}
temp = I2C_DVI_PLL_FILTER_HIGH_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_FILTER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll filter\n");
return ret;
}
} else {
temp = I2C_DVI_PLL_CHARGE_CNTL_LOW_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_CHARGE_CNTL_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll charge_cntl\n");
return ret;
}
temp = I2C_DVI_PLL_DIVIDER_LOW_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_DIVIDER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll divider\n");
return ret;
}
temp = I2C_DVI_PLL_FILTER_LOW_SPEED_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR,
I2C_DVI_PLL_FILTER_REG, 1, &temp, 1);
if (ret) {
puts("I2C: failed to select dvi pll filter\n");
return ret;
}
}
temp = I2C_DVI_POWER_MGMT_VAL;
ret = i2c_write(CONFIG_SYS_I2C_DVI_ADDR, I2C_DVI_POWER_MGMT_REG, 1,
&temp, 1);
if (ret) {
puts("I2C: failed to select dvi power mgmt\n");
return ret;
}
udelay(500);
select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
return 0;
}
void diu_set_pixel_clock(unsigned int pixclock)
{
unsigned long speed_ccb, temp;
u32 pixval;
int ret = 0;
speed_ccb = get_bus_freq(0);
temp = 1000000000 / pixclock;
temp *= 1000;
pixval = speed_ccb / temp;
/* Program HDMI encoder */
ret = diu_set_dvi_encoder(temp);
if (ret) {
puts("Failed to set DVI encoder\n");
return;
}
/* Program pixel clock */
out_be32((unsigned *)CONFIG_SYS_FSL_SCFG_PIXCLK_ADDR,
((pixval << PXCK_BITS_START) & PXCK_MASK));
/* enable clock*/
out_be32((unsigned *)CONFIG_SYS_FSL_SCFG_PIXCLK_ADDR, PXCKEN_MASK |
((pixval << PXCK_BITS_START) & PXCK_MASK));
}
int platform_diu_init(unsigned int xres, unsigned int yres, const char *port)
{
u32 pixel_format;
u8 sw;
/*Route I2C4 to DIU system as HSYNC/VSYNC*/
sw = QIXIS_READ(brdcfg[5]);
QIXIS_WRITE(brdcfg[5],
((sw & ~(BRDCFG5_IMX_MASK)) | (BRDCFG5_IMX_DIU)));
/*Configure Display ouput port as HDMI*/
sw = QIXIS_READ(brdcfg[15]);
QIXIS_WRITE(brdcfg[15],
((sw & ~(BRDCFG15_LCDPD_MASK | BRDCFG15_DIUSEL_MASK))
| (BRDCFG15_LCDPD_ENABLED | BRDCFG15_DIUSEL_HDMI)));
pixel_format = cpu_to_le32(AD_BYTE_F | (3 << AD_ALPHA_C_SHIFT) |
(0 << AD_BLUE_C_SHIFT) | (1 << AD_GREEN_C_SHIFT) |
(2 << AD_RED_C_SHIFT) | (8 << AD_COMP_3_SHIFT) |
(8 << AD_COMP_2_SHIFT) | (8 << AD_COMP_1_SHIFT) |
(8 << AD_COMP_0_SHIFT) | (3 << AD_PIXEL_S_SHIFT));
printf("DIU: Switching to monitor @ %ux%u\n", xres, yres);
return fsl_diu_init(xres, yres, pixel_format, 0);
}
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