| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * ams369fg06 AMOLED LCD panel driver. |
| * |
| * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
| * Author: Jingoo Han <jg1.han@samsung.com> |
| * |
| * Derived from drivers/video/s6e63m0.c |
| */ |
| |
| #include <linux/backlight.h> |
| #include <linux/delay.h> |
| #include <linux/fb.h> |
| #include <linux/lcd.h> |
| #include <linux/module.h> |
| #include <linux/spi/spi.h> |
| #include <linux/wait.h> |
| |
| #define SLEEPMSEC 0x1000 |
| #define ENDDEF 0x2000 |
| #define DEFMASK 0xFF00 |
| #define COMMAND_ONLY 0xFE |
| #define DATA_ONLY 0xFF |
| |
| #define MAX_GAMMA_LEVEL 5 |
| #define GAMMA_TABLE_COUNT 21 |
| |
| #define MIN_BRIGHTNESS 0 |
| #define MAX_BRIGHTNESS 255 |
| #define DEFAULT_BRIGHTNESS 150 |
| |
| struct ams369fg06 { |
| struct device *dev; |
| struct spi_device *spi; |
| unsigned int power; |
| struct lcd_device *ld; |
| struct backlight_device *bd; |
| struct lcd_platform_data *lcd_pd; |
| }; |
| |
| static const unsigned short seq_display_on[] = { |
| 0x14, 0x03, |
| ENDDEF, 0x0000 |
| }; |
| |
| static const unsigned short seq_display_off[] = { |
| 0x14, 0x00, |
| ENDDEF, 0x0000 |
| }; |
| |
| static const unsigned short seq_stand_by_on[] = { |
| 0x1D, 0xA1, |
| SLEEPMSEC, 200, |
| ENDDEF, 0x0000 |
| }; |
| |
| static const unsigned short seq_stand_by_off[] = { |
| 0x1D, 0xA0, |
| SLEEPMSEC, 250, |
| ENDDEF, 0x0000 |
| }; |
| |
| static const unsigned short seq_setting[] = { |
| 0x31, 0x08, |
| 0x32, 0x14, |
| 0x30, 0x02, |
| 0x27, 0x01, |
| 0x12, 0x08, |
| 0x13, 0x08, |
| 0x15, 0x00, |
| 0x16, 0x00, |
| |
| 0xef, 0xd0, |
| DATA_ONLY, 0xe8, |
| |
| 0x39, 0x44, |
| 0x40, 0x00, |
| 0x41, 0x3f, |
| 0x42, 0x2a, |
| 0x43, 0x27, |
| 0x44, 0x27, |
| 0x45, 0x1f, |
| 0x46, 0x44, |
| 0x50, 0x00, |
| 0x51, 0x00, |
| 0x52, 0x17, |
| 0x53, 0x24, |
| 0x54, 0x26, |
| 0x55, 0x1f, |
| 0x56, 0x43, |
| 0x60, 0x00, |
| 0x61, 0x3f, |
| 0x62, 0x2a, |
| 0x63, 0x25, |
| 0x64, 0x24, |
| 0x65, 0x1b, |
| 0x66, 0x5c, |
| |
| 0x17, 0x22, |
| 0x18, 0x33, |
| 0x19, 0x03, |
| 0x1a, 0x01, |
| 0x22, 0xa4, |
| 0x23, 0x00, |
| 0x26, 0xa0, |
| |
| 0x1d, 0xa0, |
| SLEEPMSEC, 300, |
| |
| 0x14, 0x03, |
| |
| ENDDEF, 0x0000 |
| }; |
| |
| /* gamma value: 2.2 */ |
| static const unsigned int ams369fg06_22_250[] = { |
| 0x00, 0x3f, 0x2a, 0x27, 0x27, 0x1f, 0x44, |
| 0x00, 0x00, 0x17, 0x24, 0x26, 0x1f, 0x43, |
| 0x00, 0x3f, 0x2a, 0x25, 0x24, 0x1b, 0x5c, |
| }; |
| |
| static const unsigned int ams369fg06_22_200[] = { |
| 0x00, 0x3f, 0x28, 0x29, 0x27, 0x21, 0x3e, |
| 0x00, 0x00, 0x10, 0x25, 0x27, 0x20, 0x3d, |
| 0x00, 0x3f, 0x28, 0x27, 0x25, 0x1d, 0x53, |
| }; |
| |
| static const unsigned int ams369fg06_22_150[] = { |
| 0x00, 0x3f, 0x2d, 0x29, 0x28, 0x23, 0x37, |
| 0x00, 0x00, 0x0b, 0x25, 0x28, 0x22, 0x36, |
| 0x00, 0x3f, 0x2b, 0x28, 0x26, 0x1f, 0x4a, |
| }; |
| |
| static const unsigned int ams369fg06_22_100[] = { |
| 0x00, 0x3f, 0x30, 0x2a, 0x2b, 0x24, 0x2f, |
| 0x00, 0x00, 0x00, 0x25, 0x29, 0x24, 0x2e, |
| 0x00, 0x3f, 0x2f, 0x29, 0x29, 0x21, 0x3f, |
| }; |
| |
| static const unsigned int ams369fg06_22_50[] = { |
| 0x00, 0x3f, 0x3c, 0x2c, 0x2d, 0x27, 0x24, |
| 0x00, 0x00, 0x00, 0x22, 0x2a, 0x27, 0x23, |
| 0x00, 0x3f, 0x3b, 0x2c, 0x2b, 0x24, 0x31, |
| }; |
| |
| struct ams369fg06_gamma { |
| unsigned int *gamma_22_table[MAX_GAMMA_LEVEL]; |
| }; |
| |
| static struct ams369fg06_gamma gamma_table = { |
| .gamma_22_table[0] = (unsigned int *)&ams369fg06_22_50, |
| .gamma_22_table[1] = (unsigned int *)&ams369fg06_22_100, |
| .gamma_22_table[2] = (unsigned int *)&ams369fg06_22_150, |
| .gamma_22_table[3] = (unsigned int *)&ams369fg06_22_200, |
| .gamma_22_table[4] = (unsigned int *)&ams369fg06_22_250, |
| }; |
| |
| static int ams369fg06_spi_write_byte(struct ams369fg06 *lcd, int addr, int data) |
| { |
| u16 buf[1]; |
| struct spi_message msg; |
| |
| struct spi_transfer xfer = { |
| .len = 2, |
| .tx_buf = buf, |
| }; |
| |
| buf[0] = (addr << 8) | data; |
| |
| spi_message_init(&msg); |
| spi_message_add_tail(&xfer, &msg); |
| |
| return spi_sync(lcd->spi, &msg); |
| } |
| |
| static int ams369fg06_spi_write(struct ams369fg06 *lcd, unsigned char address, |
| unsigned char command) |
| { |
| int ret = 0; |
| |
| if (address != DATA_ONLY) |
| ret = ams369fg06_spi_write_byte(lcd, 0x70, address); |
| if (command != COMMAND_ONLY) |
| ret = ams369fg06_spi_write_byte(lcd, 0x72, command); |
| |
| return ret; |
| } |
| |
| static int ams369fg06_panel_send_sequence(struct ams369fg06 *lcd, |
| const unsigned short *wbuf) |
| { |
| int ret = 0, i = 0; |
| |
| while ((wbuf[i] & DEFMASK) != ENDDEF) { |
| if ((wbuf[i] & DEFMASK) != SLEEPMSEC) { |
| ret = ams369fg06_spi_write(lcd, wbuf[i], wbuf[i+1]); |
| if (ret) |
| break; |
| } else { |
| msleep(wbuf[i+1]); |
| } |
| i += 2; |
| } |
| |
| return ret; |
| } |
| |
| static int _ams369fg06_gamma_ctl(struct ams369fg06 *lcd, |
| const unsigned int *gamma) |
| { |
| unsigned int i = 0; |
| int ret = 0; |
| |
| for (i = 0 ; i < GAMMA_TABLE_COUNT / 3; i++) { |
| ret = ams369fg06_spi_write(lcd, 0x40 + i, gamma[i]); |
| ret = ams369fg06_spi_write(lcd, 0x50 + i, gamma[i+7*1]); |
| ret = ams369fg06_spi_write(lcd, 0x60 + i, gamma[i+7*2]); |
| if (ret) { |
| dev_err(lcd->dev, "failed to set gamma table.\n"); |
| goto gamma_err; |
| } |
| } |
| |
| gamma_err: |
| return ret; |
| } |
| |
| static int ams369fg06_gamma_ctl(struct ams369fg06 *lcd, int brightness) |
| { |
| int ret = 0; |
| int gamma = 0; |
| |
| if ((brightness >= 0) && (brightness <= 50)) |
| gamma = 0; |
| else if ((brightness > 50) && (brightness <= 100)) |
| gamma = 1; |
| else if ((brightness > 100) && (brightness <= 150)) |
| gamma = 2; |
| else if ((brightness > 150) && (brightness <= 200)) |
| gamma = 3; |
| else if ((brightness > 200) && (brightness <= 255)) |
| gamma = 4; |
| |
| ret = _ams369fg06_gamma_ctl(lcd, gamma_table.gamma_22_table[gamma]); |
| |
| return ret; |
| } |
| |
| static int ams369fg06_ldi_init(struct ams369fg06 *lcd) |
| { |
| int ret, i; |
| static const unsigned short *init_seq[] = { |
| seq_setting, |
| seq_stand_by_off, |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(init_seq); i++) { |
| ret = ams369fg06_panel_send_sequence(lcd, init_seq[i]); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int ams369fg06_ldi_enable(struct ams369fg06 *lcd) |
| { |
| int ret, i; |
| static const unsigned short *init_seq[] = { |
| seq_stand_by_off, |
| seq_display_on, |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(init_seq); i++) { |
| ret = ams369fg06_panel_send_sequence(lcd, init_seq[i]); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int ams369fg06_ldi_disable(struct ams369fg06 *lcd) |
| { |
| int ret, i; |
| |
| static const unsigned short *init_seq[] = { |
| seq_display_off, |
| seq_stand_by_on, |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(init_seq); i++) { |
| ret = ams369fg06_panel_send_sequence(lcd, init_seq[i]); |
| if (ret) |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int ams369fg06_power_is_on(int power) |
| { |
| return power <= FB_BLANK_NORMAL; |
| } |
| |
| static int ams369fg06_power_on(struct ams369fg06 *lcd) |
| { |
| int ret = 0; |
| struct lcd_platform_data *pd; |
| struct backlight_device *bd; |
| |
| pd = lcd->lcd_pd; |
| bd = lcd->bd; |
| |
| if (pd->power_on) { |
| pd->power_on(lcd->ld, 1); |
| msleep(pd->power_on_delay); |
| } |
| |
| if (!pd->reset) { |
| dev_err(lcd->dev, "reset is NULL.\n"); |
| return -EINVAL; |
| } |
| |
| pd->reset(lcd->ld); |
| msleep(pd->reset_delay); |
| |
| ret = ams369fg06_ldi_init(lcd); |
| if (ret) { |
| dev_err(lcd->dev, "failed to initialize ldi.\n"); |
| return ret; |
| } |
| |
| ret = ams369fg06_ldi_enable(lcd); |
| if (ret) { |
| dev_err(lcd->dev, "failed to enable ldi.\n"); |
| return ret; |
| } |
| |
| /* set brightness to current value after power on or resume. */ |
| ret = ams369fg06_gamma_ctl(lcd, bd->props.brightness); |
| if (ret) { |
| dev_err(lcd->dev, "lcd gamma setting failed.\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int ams369fg06_power_off(struct ams369fg06 *lcd) |
| { |
| int ret; |
| struct lcd_platform_data *pd; |
| |
| pd = lcd->lcd_pd; |
| |
| ret = ams369fg06_ldi_disable(lcd); |
| if (ret) { |
| dev_err(lcd->dev, "lcd setting failed.\n"); |
| return -EIO; |
| } |
| |
| msleep(pd->power_off_delay); |
| |
| if (pd->power_on) |
| pd->power_on(lcd->ld, 0); |
| |
| return 0; |
| } |
| |
| static int ams369fg06_power(struct ams369fg06 *lcd, int power) |
| { |
| int ret = 0; |
| |
| if (ams369fg06_power_is_on(power) && |
| !ams369fg06_power_is_on(lcd->power)) |
| ret = ams369fg06_power_on(lcd); |
| else if (!ams369fg06_power_is_on(power) && |
| ams369fg06_power_is_on(lcd->power)) |
| ret = ams369fg06_power_off(lcd); |
| |
| if (!ret) |
| lcd->power = power; |
| |
| return ret; |
| } |
| |
| static int ams369fg06_get_power(struct lcd_device *ld) |
| { |
| struct ams369fg06 *lcd = lcd_get_data(ld); |
| |
| return lcd->power; |
| } |
| |
| static int ams369fg06_set_power(struct lcd_device *ld, int power) |
| { |
| struct ams369fg06 *lcd = lcd_get_data(ld); |
| |
| if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && |
| power != FB_BLANK_NORMAL) { |
| dev_err(lcd->dev, "power value should be 0, 1 or 4.\n"); |
| return -EINVAL; |
| } |
| |
| return ams369fg06_power(lcd, power); |
| } |
| |
| static int ams369fg06_set_brightness(struct backlight_device *bd) |
| { |
| int ret = 0; |
| int brightness = bd->props.brightness; |
| struct ams369fg06 *lcd = bl_get_data(bd); |
| |
| if (brightness < MIN_BRIGHTNESS || |
| brightness > bd->props.max_brightness) { |
| dev_err(&bd->dev, "lcd brightness should be %d to %d.\n", |
| MIN_BRIGHTNESS, MAX_BRIGHTNESS); |
| return -EINVAL; |
| } |
| |
| ret = ams369fg06_gamma_ctl(lcd, bd->props.brightness); |
| if (ret) { |
| dev_err(&bd->dev, "lcd brightness setting failed.\n"); |
| return -EIO; |
| } |
| |
| return ret; |
| } |
| |
| static const struct lcd_ops ams369fg06_lcd_ops = { |
| .get_power = ams369fg06_get_power, |
| .set_power = ams369fg06_set_power, |
| }; |
| |
| static const struct backlight_ops ams369fg06_backlight_ops = { |
| .update_status = ams369fg06_set_brightness, |
| }; |
| |
| static int ams369fg06_probe(struct spi_device *spi) |
| { |
| int ret = 0; |
| struct ams369fg06 *lcd = NULL; |
| struct lcd_device *ld = NULL; |
| struct backlight_device *bd = NULL; |
| struct backlight_properties props; |
| |
| lcd = devm_kzalloc(&spi->dev, sizeof(struct ams369fg06), GFP_KERNEL); |
| if (!lcd) |
| return -ENOMEM; |
| |
| /* ams369fg06 lcd panel uses 3-wire 16bits SPI Mode. */ |
| spi->bits_per_word = 16; |
| |
| ret = spi_setup(spi); |
| if (ret < 0) { |
| dev_err(&spi->dev, "spi setup failed.\n"); |
| return ret; |
| } |
| |
| lcd->spi = spi; |
| lcd->dev = &spi->dev; |
| |
| lcd->lcd_pd = dev_get_platdata(&spi->dev); |
| if (!lcd->lcd_pd) { |
| dev_err(&spi->dev, "platform data is NULL\n"); |
| return -EINVAL; |
| } |
| |
| ld = devm_lcd_device_register(&spi->dev, "ams369fg06", &spi->dev, lcd, |
| &ams369fg06_lcd_ops); |
| if (IS_ERR(ld)) |
| return PTR_ERR(ld); |
| |
| lcd->ld = ld; |
| |
| memset(&props, 0, sizeof(struct backlight_properties)); |
| props.type = BACKLIGHT_RAW; |
| props.max_brightness = MAX_BRIGHTNESS; |
| |
| bd = devm_backlight_device_register(&spi->dev, "ams369fg06-bl", |
| &spi->dev, lcd, |
| &ams369fg06_backlight_ops, &props); |
| if (IS_ERR(bd)) |
| return PTR_ERR(bd); |
| |
| bd->props.brightness = DEFAULT_BRIGHTNESS; |
| lcd->bd = bd; |
| |
| if (!lcd->lcd_pd->lcd_enabled) { |
| /* |
| * if lcd panel was off from bootloader then |
| * current lcd status is powerdown and then |
| * it enables lcd panel. |
| */ |
| lcd->power = FB_BLANK_POWERDOWN; |
| |
| ams369fg06_power(lcd, FB_BLANK_UNBLANK); |
| } else { |
| lcd->power = FB_BLANK_UNBLANK; |
| } |
| |
| spi_set_drvdata(spi, lcd); |
| |
| dev_info(&spi->dev, "ams369fg06 panel driver has been probed.\n"); |
| |
| return 0; |
| } |
| |
| static void ams369fg06_remove(struct spi_device *spi) |
| { |
| struct ams369fg06 *lcd = spi_get_drvdata(spi); |
| |
| ams369fg06_power(lcd, FB_BLANK_POWERDOWN); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int ams369fg06_suspend(struct device *dev) |
| { |
| struct ams369fg06 *lcd = dev_get_drvdata(dev); |
| |
| dev_dbg(dev, "lcd->power = %d\n", lcd->power); |
| |
| /* |
| * when lcd panel is suspend, lcd panel becomes off |
| * regardless of status. |
| */ |
| return ams369fg06_power(lcd, FB_BLANK_POWERDOWN); |
| } |
| |
| static int ams369fg06_resume(struct device *dev) |
| { |
| struct ams369fg06 *lcd = dev_get_drvdata(dev); |
| |
| lcd->power = FB_BLANK_POWERDOWN; |
| |
| return ams369fg06_power(lcd, FB_BLANK_UNBLANK); |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(ams369fg06_pm_ops, ams369fg06_suspend, |
| ams369fg06_resume); |
| |
| static void ams369fg06_shutdown(struct spi_device *spi) |
| { |
| struct ams369fg06 *lcd = spi_get_drvdata(spi); |
| |
| ams369fg06_power(lcd, FB_BLANK_POWERDOWN); |
| } |
| |
| static struct spi_driver ams369fg06_driver = { |
| .driver = { |
| .name = "ams369fg06", |
| .pm = &ams369fg06_pm_ops, |
| }, |
| .probe = ams369fg06_probe, |
| .remove = ams369fg06_remove, |
| .shutdown = ams369fg06_shutdown, |
| }; |
| |
| module_spi_driver(ams369fg06_driver); |
| |
| MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); |
| MODULE_DESCRIPTION("ams369fg06 LCD Driver"); |
| MODULE_LICENSE("GPL"); |