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// SPDX-License-Identifier: GPL-2.0
/*
* KFR2R09 LCD panel support
*
* Copyright (C) 2009 Magnus Damm
*
* Register settings based on the out-of-tree t33fb.c driver
* Copyright (C) 2008 Lineo Solutions, Inc.
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio.h>
#include <video/sh_mobile_lcdc.h>
#include <mach/kfr2r09.h>
#include <cpu/sh7724.h>
/* The on-board LCD module is a Hitachi TX07D34VM0AAA. This module is made
* up of a 240x400 LCD hooked up to a R61517 driver IC. The driver IC is
* communicating with the main port of the LCDC using an 18-bit SYS interface.
*
* The device code for this LCD module is 0x01221517.
*/
static const unsigned char data_frame_if[] = {
0x02, /* WEMODE: 1=cont, 0=one-shot */
0x00, 0x00,
0x00, /* EPF, DFM */
0x02, /* RIM[1] : 1 (18bpp) */
};
static const unsigned char data_panel[] = {
0x0b,
0x63, /* 400 lines */
0x04, 0x00, 0x00, 0x04, 0x11, 0x00, 0x00,
};
static const unsigned char data_timing[] = {
0x00, 0x00, 0x13, 0x08, 0x08,
};
static const unsigned char data_timing_src[] = {
0x11, 0x01, 0x00, 0x01,
};
static const unsigned char data_gamma[] = {
0x01, 0x02, 0x08, 0x23, 0x03, 0x0c, 0x00, 0x06, 0x00, 0x00,
0x01, 0x00, 0x0c, 0x23, 0x03, 0x08, 0x02, 0x06, 0x00, 0x00,
};
static const unsigned char data_power[] = {
0x07, 0xc5, 0xdc, 0x02, 0x33, 0x0a,
};
static unsigned long read_reg(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so)
{
return so->read_data(sohandle);
}
static void write_reg(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so,
int i, unsigned long v)
{
if (i)
so->write_data(sohandle, v); /* PTH4/LCDRS High [param, 17:0] */
else
so->write_index(sohandle, v); /* PTH4/LCDRS Low [cmd, 7:0] */
}
static void write_data(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so,
unsigned char const *data, int no_data)
{
int i;
for (i = 0; i < no_data; i++)
write_reg(sohandle, so, 1, data[i]);
}
static unsigned long read_device_code(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so)
{
unsigned long device_code;
/* access protect OFF */
write_reg(sohandle, so, 0, 0xb0);
write_reg(sohandle, so, 1, 0x00);
/* deep standby OFF */
write_reg(sohandle, so, 0, 0xb1);
write_reg(sohandle, so, 1, 0x00);
/* device code command */
write_reg(sohandle, so, 0, 0xbf);
mdelay(50);
/* dummy read */
read_reg(sohandle, so);
/* read device code */
device_code = ((read_reg(sohandle, so) & 0xff) << 24);
device_code |= ((read_reg(sohandle, so) & 0xff) << 16);
device_code |= ((read_reg(sohandle, so) & 0xff) << 8);
device_code |= (read_reg(sohandle, so) & 0xff);
return device_code;
}
static void write_memory_start(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so)
{
write_reg(sohandle, so, 0, 0x2c);
}
static void clear_memory(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so)
{
int i;
/* write start */
write_memory_start(sohandle, so);
/* paint it black */
for (i = 0; i < (240 * 400); i++)
write_reg(sohandle, so, 1, 0x00);
}
static void display_on(void *sohandle,
struct sh_mobile_lcdc_sys_bus_ops *so)
{
/* access protect off */
write_reg(sohandle, so, 0, 0xb0);
write_reg(sohandle, so, 1, 0x00);
/* exit deep standby mode */
write_reg(sohandle, so, 0, 0xb1);
write_reg(sohandle, so, 1, 0x00);
/* frame memory I/F */
write_reg(sohandle, so, 0, 0xb3);
write_data(sohandle, so, data_frame_if, ARRAY_SIZE(data_frame_if));
/* display mode and frame memory write mode */
write_reg(sohandle, so, 0, 0xb4);
write_reg(sohandle, so, 1, 0x00); /* DBI, internal clock */
/* panel */
write_reg(sohandle, so, 0, 0xc0);
write_data(sohandle, so, data_panel, ARRAY_SIZE(data_panel));
/* timing (normal) */
write_reg(sohandle, so, 0, 0xc1);
write_data(sohandle, so, data_timing, ARRAY_SIZE(data_timing));
/* timing (partial) */
write_reg(sohandle, so, 0, 0xc2);
write_data(sohandle, so, data_timing, ARRAY_SIZE(data_timing));
/* timing (idle) */
write_reg(sohandle, so, 0, 0xc3);
write_data(sohandle, so, data_timing, ARRAY_SIZE(data_timing));
/* timing (source/VCOM/gate driving) */
write_reg(sohandle, so, 0, 0xc4);
write_data(sohandle, so, data_timing_src, ARRAY_SIZE(data_timing_src));
/* gamma (red) */
write_reg(sohandle, so, 0, 0xc8);
write_data(sohandle, so, data_gamma, ARRAY_SIZE(data_gamma));
/* gamma (green) */
write_reg(sohandle, so, 0, 0xc9);
write_data(sohandle, so, data_gamma, ARRAY_SIZE(data_gamma));
/* gamma (blue) */
write_reg(sohandle, so, 0, 0xca);
write_data(sohandle, so, data_gamma, ARRAY_SIZE(data_gamma));
/* power (common) */
write_reg(sohandle, so, 0, 0xd0);
write_data(sohandle, so, data_power, ARRAY_SIZE(data_power));
/* VCOM */
write_reg(sohandle, so, 0, 0xd1);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0x0f);
write_reg(sohandle, so, 1, 0x02);
/* power (normal) */
write_reg(sohandle, so, 0, 0xd2);
write_reg(sohandle, so, 1, 0x63);
write_reg(sohandle, so, 1, 0x24);
/* power (partial) */
write_reg(sohandle, so, 0, 0xd3);
write_reg(sohandle, so, 1, 0x63);
write_reg(sohandle, so, 1, 0x24);
/* power (idle) */
write_reg(sohandle, so, 0, 0xd4);
write_reg(sohandle, so, 1, 0x63);
write_reg(sohandle, so, 1, 0x24);
write_reg(sohandle, so, 0, 0xd8);
write_reg(sohandle, so, 1, 0x77);
write_reg(sohandle, so, 1, 0x77);
/* TE signal */
write_reg(sohandle, so, 0, 0x35);
write_reg(sohandle, so, 1, 0x00);
/* TE signal line */
write_reg(sohandle, so, 0, 0x44);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0x00);
/* column address */
write_reg(sohandle, so, 0, 0x2a);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0xef);
/* page address */
write_reg(sohandle, so, 0, 0x2b);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0x00);
write_reg(sohandle, so, 1, 0x01);
write_reg(sohandle, so, 1, 0x8f);
/* exit sleep mode */
write_reg(sohandle, so, 0, 0x11);
mdelay(120);
/* clear vram */
clear_memory(sohandle, so);
/* display ON */
write_reg(sohandle, so, 0, 0x29);
mdelay(1);
write_memory_start(sohandle, so);
}
int kfr2r09_lcd_setup(void *sohandle, struct sh_mobile_lcdc_sys_bus_ops *so)
{
/* power on */
gpio_set_value(GPIO_PTF4, 0); /* PROTECT/ -> L */
gpio_set_value(GPIO_PTE4, 0); /* LCD_RST/ -> L */
gpio_set_value(GPIO_PTF4, 1); /* PROTECT/ -> H */
udelay(1100);
gpio_set_value(GPIO_PTE4, 1); /* LCD_RST/ -> H */
udelay(10);
gpio_set_value(GPIO_PTF4, 0); /* PROTECT/ -> L */
mdelay(20);
if (read_device_code(sohandle, so) != 0x01221517)
return -ENODEV;
pr_info("KFR2R09 WQVGA LCD Module detected.\n");
display_on(sohandle, so);
return 0;
}
void kfr2r09_lcd_start(void *sohandle, struct sh_mobile_lcdc_sys_bus_ops *so)
{
write_memory_start(sohandle, so);
}
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