437 lines
9.5 KiB
C
437 lines
9.5 KiB
C
/*
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* lms501kf03 TFT LCD panel driver.
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/gpio.h>
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#include <linux/lcd.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/wait.h>
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#define COMMAND_ONLY 0x00
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#define DATA_ONLY 0x01
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struct lms501kf03 {
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struct device *dev;
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struct spi_device *spi;
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unsigned int power;
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struct lcd_device *ld;
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struct lcd_platform_data *lcd_pd;
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};
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static const unsigned char seq_password[] = {
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0xb9, 0xff, 0x83, 0x69,
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};
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static const unsigned char seq_power[] = {
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0xb1, 0x01, 0x00, 0x34, 0x06, 0x00, 0x14, 0x14, 0x20, 0x28,
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0x12, 0x12, 0x17, 0x0a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
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};
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static const unsigned char seq_display[] = {
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0xb2, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, 0xff, 0x00, 0x00,
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0x00, 0x00, 0x03, 0x03, 0x00, 0x01,
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};
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static const unsigned char seq_rgb_if[] = {
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0xb3, 0x09,
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};
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static const unsigned char seq_display_inv[] = {
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0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06,
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};
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static const unsigned char seq_vcom[] = {
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0xb6, 0x4c, 0x2e,
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};
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static const unsigned char seq_gate[] = {
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0xd5, 0x00, 0x05, 0x03, 0x29, 0x01, 0x07, 0x17, 0x68, 0x13,
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0x37, 0x20, 0x31, 0x8a, 0x46, 0x9b, 0x57, 0x13, 0x02, 0x75,
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0xb9, 0x64, 0xa8, 0x07, 0x0f, 0x04, 0x07,
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};
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static const unsigned char seq_panel[] = {
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0xcc, 0x02,
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};
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static const unsigned char seq_col_mod[] = {
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0x3a, 0x77,
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};
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static const unsigned char seq_w_gamma[] = {
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0xe0, 0x00, 0x04, 0x09, 0x0f, 0x1f, 0x3f, 0x1f, 0x2f, 0x0a,
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0x0f, 0x10, 0x16, 0x18, 0x16, 0x17, 0x0d, 0x15, 0x00, 0x04,
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0x09, 0x0f, 0x38, 0x3f, 0x20, 0x39, 0x0a, 0x0f, 0x10, 0x16,
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0x18, 0x16, 0x17, 0x0d, 0x15,
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};
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static const unsigned char seq_rgb_gamma[] = {
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0xc1, 0x01, 0x03, 0x07, 0x0f, 0x1a, 0x22, 0x2c, 0x33, 0x3c,
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0x46, 0x4f, 0x58, 0x60, 0x69, 0x71, 0x79, 0x82, 0x89, 0x92,
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0x9a, 0xa1, 0xa9, 0xb1, 0xb9, 0xc1, 0xc9, 0xcf, 0xd6, 0xde,
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0xe5, 0xec, 0xf3, 0xf9, 0xff, 0xdd, 0x39, 0x07, 0x1c, 0xcb,
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0xab, 0x5f, 0x49, 0x80, 0x03, 0x07, 0x0f, 0x19, 0x20, 0x2a,
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0x31, 0x39, 0x42, 0x4b, 0x53, 0x5b, 0x63, 0x6b, 0x73, 0x7b,
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0x83, 0x8a, 0x92, 0x9b, 0xa2, 0xaa, 0xb2, 0xba, 0xc2, 0xca,
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0xd0, 0xd8, 0xe1, 0xe8, 0xf0, 0xf8, 0xff, 0xf7, 0xd8, 0xbe,
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0xa7, 0x39, 0x40, 0x85, 0x8c, 0xc0, 0x04, 0x07, 0x0c, 0x17,
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0x1c, 0x23, 0x2b, 0x34, 0x3b, 0x43, 0x4c, 0x54, 0x5b, 0x63,
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0x6a, 0x73, 0x7a, 0x82, 0x8a, 0x91, 0x98, 0xa1, 0xa8, 0xb0,
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0xb7, 0xc1, 0xc9, 0xcf, 0xd9, 0xe3, 0xea, 0xf4, 0xff, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};
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static const unsigned char seq_up_dn[] = {
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0x36, 0x10,
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};
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static const unsigned char seq_sleep_in[] = {
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0x10,
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};
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static const unsigned char seq_sleep_out[] = {
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0x11,
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};
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static const unsigned char seq_display_on[] = {
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0x29,
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};
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static const unsigned char seq_display_off[] = {
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0x10,
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};
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static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)
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{
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u16 buf[1];
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struct spi_message msg;
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struct spi_transfer xfer = {
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.len = 2,
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.tx_buf = buf,
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};
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buf[0] = (addr << 8) | data;
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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return spi_sync(lcd->spi, &msg);
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}
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static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,
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unsigned char command)
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{
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return lms501kf03_spi_write_byte(lcd, address, command);
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}
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static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,
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const unsigned char *wbuf,
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unsigned int len)
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{
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int ret = 0, i = 0;
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while (i < len) {
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if (i == 0)
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ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);
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else
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ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);
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if (ret)
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break;
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i += 1;
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}
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return ret;
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}
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static int lms501kf03_ldi_init(struct lms501kf03 *lcd)
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{
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int ret, i;
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static const unsigned char *init_seq[] = {
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seq_password,
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seq_power,
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seq_display,
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seq_rgb_if,
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seq_display_inv,
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seq_vcom,
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seq_gate,
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seq_panel,
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seq_col_mod,
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seq_w_gamma,
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seq_rgb_gamma,
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seq_sleep_out,
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};
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static const unsigned int size_seq[] = {
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ARRAY_SIZE(seq_password),
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ARRAY_SIZE(seq_power),
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ARRAY_SIZE(seq_display),
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ARRAY_SIZE(seq_rgb_if),
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ARRAY_SIZE(seq_display_inv),
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ARRAY_SIZE(seq_vcom),
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ARRAY_SIZE(seq_gate),
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ARRAY_SIZE(seq_panel),
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ARRAY_SIZE(seq_col_mod),
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ARRAY_SIZE(seq_w_gamma),
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ARRAY_SIZE(seq_rgb_gamma),
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ARRAY_SIZE(seq_sleep_out),
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};
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for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
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ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],
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size_seq[i]);
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if (ret)
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break;
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}
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/*
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* According to the datasheet, 120ms delay time is required.
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* After sleep out sequence, command is blocked for 120ms.
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* Thus, LDI should wait for 120ms.
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*/
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msleep(120);
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return ret;
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}
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static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)
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{
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return lms501kf03_panel_send_sequence(lcd, seq_display_on,
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ARRAY_SIZE(seq_display_on));
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}
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static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)
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{
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return lms501kf03_panel_send_sequence(lcd, seq_display_off,
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ARRAY_SIZE(seq_display_off));
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}
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static int lms501kf03_power_is_on(int power)
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{
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return (power) <= FB_BLANK_NORMAL;
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}
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static int lms501kf03_power_on(struct lms501kf03 *lcd)
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{
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int ret = 0;
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struct lcd_platform_data *pd;
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pd = lcd->lcd_pd;
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if (!pd->power_on) {
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dev_err(lcd->dev, "power_on is NULL.\n");
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return -EINVAL;
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}
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pd->power_on(lcd->ld, 1);
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msleep(pd->power_on_delay);
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if (!pd->reset) {
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dev_err(lcd->dev, "reset is NULL.\n");
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return -EINVAL;
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}
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pd->reset(lcd->ld);
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msleep(pd->reset_delay);
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ret = lms501kf03_ldi_init(lcd);
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if (ret) {
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dev_err(lcd->dev, "failed to initialize ldi.\n");
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return ret;
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}
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ret = lms501kf03_ldi_enable(lcd);
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if (ret) {
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dev_err(lcd->dev, "failed to enable ldi.\n");
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return ret;
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}
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return 0;
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}
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static int lms501kf03_power_off(struct lms501kf03 *lcd)
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{
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int ret = 0;
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struct lcd_platform_data *pd;
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pd = lcd->lcd_pd;
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ret = lms501kf03_ldi_disable(lcd);
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if (ret) {
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dev_err(lcd->dev, "lcd setting failed.\n");
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return -EIO;
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}
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msleep(pd->power_off_delay);
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pd->power_on(lcd->ld, 0);
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return 0;
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}
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static int lms501kf03_power(struct lms501kf03 *lcd, int power)
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{
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int ret = 0;
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if (lms501kf03_power_is_on(power) &&
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!lms501kf03_power_is_on(lcd->power))
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ret = lms501kf03_power_on(lcd);
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else if (!lms501kf03_power_is_on(power) &&
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lms501kf03_power_is_on(lcd->power))
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ret = lms501kf03_power_off(lcd);
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if (!ret)
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lcd->power = power;
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return ret;
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}
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static int lms501kf03_get_power(struct lcd_device *ld)
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{
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struct lms501kf03 *lcd = lcd_get_data(ld);
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return lcd->power;
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}
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static int lms501kf03_set_power(struct lcd_device *ld, int power)
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{
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struct lms501kf03 *lcd = lcd_get_data(ld);
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if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
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power != FB_BLANK_NORMAL) {
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dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
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return -EINVAL;
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}
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return lms501kf03_power(lcd, power);
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}
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static struct lcd_ops lms501kf03_lcd_ops = {
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.get_power = lms501kf03_get_power,
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.set_power = lms501kf03_set_power,
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};
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static int lms501kf03_probe(struct spi_device *spi)
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{
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struct lms501kf03 *lcd = NULL;
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struct lcd_device *ld = NULL;
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int ret = 0;
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lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);
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if (!lcd)
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return -ENOMEM;
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/* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */
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spi->bits_per_word = 9;
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ret = spi_setup(spi);
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if (ret < 0) {
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dev_err(&spi->dev, "spi setup failed.\n");
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return ret;
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}
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lcd->spi = spi;
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lcd->dev = &spi->dev;
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lcd->lcd_pd = dev_get_platdata(&spi->dev);
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if (!lcd->lcd_pd) {
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dev_err(&spi->dev, "platform data is NULL\n");
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return -EINVAL;
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}
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ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd,
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&lms501kf03_lcd_ops);
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if (IS_ERR(ld))
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return PTR_ERR(ld);
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lcd->ld = ld;
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if (!lcd->lcd_pd->lcd_enabled) {
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/*
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* if lcd panel was off from bootloader then
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* current lcd status is powerdown and then
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* it enables lcd panel.
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*/
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lcd->power = FB_BLANK_POWERDOWN;
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lms501kf03_power(lcd, FB_BLANK_UNBLANK);
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} else {
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lcd->power = FB_BLANK_UNBLANK;
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}
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spi_set_drvdata(spi, lcd);
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dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n");
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return 0;
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}
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static int lms501kf03_remove(struct spi_device *spi)
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{
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struct lms501kf03 *lcd = spi_get_drvdata(spi);
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lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int lms501kf03_suspend(struct device *dev)
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{
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struct lms501kf03 *lcd = dev_get_drvdata(dev);
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dev_dbg(dev, "lcd->power = %d\n", lcd->power);
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/*
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* when lcd panel is suspend, lcd panel becomes off
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* regardless of status.
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*/
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return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
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}
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static int lms501kf03_resume(struct device *dev)
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{
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struct lms501kf03 *lcd = dev_get_drvdata(dev);
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lcd->power = FB_BLANK_POWERDOWN;
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return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
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}
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#endif
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static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend,
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lms501kf03_resume);
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static void lms501kf03_shutdown(struct spi_device *spi)
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{
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struct lms501kf03 *lcd = spi_get_drvdata(spi);
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lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
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}
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static struct spi_driver lms501kf03_driver = {
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.driver = {
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.name = "lms501kf03",
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.pm = &lms501kf03_pm_ops,
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},
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.probe = lms501kf03_probe,
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.remove = lms501kf03_remove,
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.shutdown = lms501kf03_shutdown,
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};
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module_spi_driver(lms501kf03_driver);
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MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
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MODULE_DESCRIPTION("lms501kf03 LCD Driver");
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MODULE_LICENSE("GPL");
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