diff options
Diffstat (limited to 'drivers/video/samsung_duallcd/s6dr171.c')
-rw-r--r-- | drivers/video/samsung_duallcd/s6dr171.c | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/drivers/video/samsung_duallcd/s6dr171.c b/drivers/video/samsung_duallcd/s6dr171.c new file mode 100644 index 0000000..167f658 --- /dev/null +++ b/drivers/video/samsung_duallcd/s6dr171.c @@ -0,0 +1,571 @@ +/* linux/drivers/video/samsung/s3cfb_s6e8aa0.c + * + * MIPI-DSI based AMS529HA01 AMOLED lcd panel driver. + * + * 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/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/mutex.h> +#include <linux/wait.h> +#include <linux/ctype.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/gpio.h> +#include <linux/workqueue.h> +#include <linux/backlight.h> +#include <linux/lcd.h> +#include <plat/gpio-cfg.h> +#include <plat/regs-dsim.h> +#include <mach/dsim.h> +#include <mach/mipi_ddi.h> +#ifdef CONFIG_HAS_EARLYSUSPEND +#include <linux/earlysuspend.h> +#endif + +#include "s5p-dsim.h" +#include "s3cfb.h" + +#include "s6dr171_param.h" + +#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) + +#define MIN_BRIGHTNESS 0 +#define MAX_BRIGHTNESS 255 +#define MAX_GAMMA 300 +#define DEFAULT_BRIGHTNESS 160 +#define DEFAULT_GAMMA_LEVEL GAMMA_160CD + +#define LDI_ID_REG 0xD1 +#define LDI_ID_LEN 3 + +#define LDI_MTP_ADDR 0xCB +#define LDI_MTP_LENGTH 63 + +struct lcd_info { + unsigned int bl; + unsigned int auto_brightness; + unsigned int acl_enable; + unsigned int cur_acl; + unsigned int current_bl; + unsigned int current_elvss; + + unsigned int ldi_enable; + unsigned int power; + struct mutex lock; + struct mutex bl_lock; + + struct device *dev; + struct lcd_device *ld; + struct backlight_device *bd; + struct lcd_platform_data *lcd_pd; + struct early_suspend early_suspend; + + unsigned char id[LDI_ID_LEN]; + + unsigned char **gamma_table; + unsigned char **elvss_table; + + unsigned int irq; + unsigned int connected; + + struct dsim_global *dsim; +}; + +static int s6e8ax0_write(struct lcd_info *lcd, const unsigned char *seq, int len) +{ + int size; + const unsigned char *wbuf; + + if (!lcd->connected) + return 0; + + mutex_lock(&lcd->lock); + + size = len; + wbuf = seq; + + if (size == 1) + lcd->dsim->ops->cmd_write(lcd->dsim, DCS_WR_NO_PARA, wbuf[0], 0); + else if (size == 2) + lcd->dsim->ops->cmd_write(lcd->dsim, DCS_WR_1_PARA, wbuf[0], wbuf[1]); + else + lcd->dsim->ops->cmd_write(lcd->dsim, DCS_LONG_WR, (unsigned int)wbuf, size); + + mutex_unlock(&lcd->lock); + + return 0; +} + +static int _s6e8ax0_read(struct lcd_info *lcd, const u8 addr, u16 count, u8 *buf) +{ + int ret = 0; + + if (!lcd->connected) + return ret; + + mutex_lock(&lcd->lock); + + if (lcd->dsim->ops->cmd_read) + ret = lcd->dsim->ops->cmd_read(lcd->dsim, addr, count, buf); + + mutex_unlock(&lcd->lock); + + return ret; +} + +static int s6e8ax0_read(struct lcd_info *lcd, const u8 addr, u16 count, u8 *buf, u8 retry_cnt) +{ + int ret = 0; + +read_retry: + ret = _s6e8ax0_read(lcd, addr, count, buf); + if (!ret) { + if (retry_cnt) { + printk(KERN_WARNING "[WARN:LCD] %s : retry cnt : %d\n", __func__, retry_cnt); + retry_cnt--; + goto read_retry; + } else + printk(KERN_ERR "[ERROR:LCD] %s : 0x%02x read failed\n", __func__, addr); + } + + return ret; +} + +static int s6e8ax0_ldi_init(struct lcd_info *lcd) +{ + int ret = 0; + + s6e8ax0_write(lcd, SEQ_APPLY_LEVEL_1_KEY, ARRAY_SIZE(SEQ_APPLY_LEVEL_1_KEY)); + s6e8ax0_write(lcd, SEQ_APPLY_MTP_KEY_ENABLE, ARRAY_SIZE(SEQ_APPLY_MTP_KEY_ENABLE)); + s6e8ax0_write(lcd, SEQ_PWRSEQCTL, ARRAY_SIZE(SEQ_PWRSEQCTL)); + s6e8ax0_write(lcd, SEQ_DISPLAY_BRIGHTNESSS, ARRAY_SIZE(SEQ_DISPLAY_BRIGHTNESSS)); + s6e8ax0_write(lcd, SEQ_CONTROL_DISPLAY, ARRAY_SIZE(SEQ_CONTROL_DISPLAY)); + s6e8ax0_write(lcd, SEQ_SLEEP_OUT, ARRAY_SIZE(SEQ_SLEEP_OUT)); + msleep(120); + + s6e8ax0_write(lcd, SEQ_PANEL_CONDITION_SET, ARRAY_SIZE(SEQ_PANEL_CONDITION_SET)); + s6e8ax0_write(lcd, SEQ_DISPLAY_CONDITION_SET, ARRAY_SIZE(SEQ_DISPLAY_CONDITION_SET)); + s6e8ax0_write(lcd, SEQ_GAMMA_CONDITION_SET, ARRAY_SIZE(SEQ_GAMMA_CONDITION_SET)); + s6e8ax0_write(lcd, SEQ_GAMMA_UPDATE, ARRAY_SIZE(SEQ_GAMMA_UPDATE)); + msleep(20); + s6e8ax0_write(lcd, SEQ_GAMMA_UPDATE2, ARRAY_SIZE(SEQ_GAMMA_UPDATE2)); + msleep(20); + + s6e8ax0_write(lcd, SEQ_ETC_SOURCE_CONTROL, ARRAY_SIZE(SEQ_ETC_SOURCE_CONTROL)); + s6e8ax0_write(lcd, SEQ_ETC_NVM_SETTING, ARRAY_SIZE(SEQ_ETC_NVM_SETTING)); + s6e8ax0_write(lcd, SEQ_ETC_POWER_CONTROL, ARRAY_SIZE(SEQ_ETC_POWER_CONTROL)); + + s6e8ax0_write(lcd, SEQ_ELVSS_CONTROL, ARRAY_SIZE(SEQ_ELVSS_CONTROL)); + + return ret; +} + +static int s6e8ax0_ldi_enable(struct lcd_info *lcd) +{ + int ret = 0; + + s6e8ax0_write(lcd, SEQ_DISPLAY_ON, ARRAY_SIZE(SEQ_DISPLAY_ON)); + + return ret; +} + +static int s6e8ax0_ldi_disable(struct lcd_info *lcd) +{ + int ret = 0; + + s6e8ax0_write(lcd, SEQ_DISPLAY_OFF, ARRAY_SIZE(SEQ_DISPLAY_OFF)); + s6e8ax0_write(lcd, SEQ_STANDBY_ON, ARRAY_SIZE(SEQ_STANDBY_ON)); + + return ret; +} + +static int s6e8ax0_power_on(struct lcd_info *lcd) +{ + int ret = 0; + struct lcd_platform_data *pd = NULL; + pd = lcd->lcd_pd; + + /* dev_info(&lcd->ld->dev, "%s\n", __func__); */ + + ret = s6e8ax0_ldi_init(lcd); + if (ret) { + dev_err(&lcd->ld->dev, "failed to initialize ldi.\n"); + goto err; + } + + msleep(120); + + ret = s6e8ax0_ldi_enable(lcd); + if (ret) { + dev_err(&lcd->ld->dev, "failed to enable ldi.\n"); + goto err; + } + + lcd->ldi_enable = 1; + + /* update_brightness(lcd, 1); */ +err: + return ret; +} + +static int s6e8ax0_power_off(struct lcd_info *lcd) +{ + int ret = 0; + + dev_info(&lcd->ld->dev, "%s\n", __func__); + + lcd->ldi_enable = 0; + + ret = s6e8ax0_ldi_disable(lcd); + + msleep(135); + + return ret; +} + +static int s6e8ax0_power(struct lcd_info *lcd, int power) +{ + int ret = 0; + + if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) + ret = s6e8ax0_power_on(lcd); + else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) + ret = s6e8ax0_power_off(lcd); + + if (!ret) + lcd->power = power; + + return ret; +} + +static int s6e8ax0_set_power(struct lcd_device *ld, int power) +{ + struct lcd_info *lcd = lcd_get_data(ld); + + if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN && + power != FB_BLANK_NORMAL) { + dev_err(&lcd->ld->dev, "power value should be 0, 1 or 4.\n"); + return -EINVAL; + } + + return s6e8ax0_power(lcd, power); +} + +static int s6e8ax0_get_power(struct lcd_device *ld) +{ + struct lcd_info *lcd = lcd_get_data(ld); + + return lcd->power; +} + +static int s6e8ax0_set_brightness(struct backlight_device *bd) +{ + int ret = 0; + int brightness = bd->props.brightness; + struct lcd_info *lcd = bl_get_data(bd); + + /* dev_info(&lcd->ld->dev, "%s: brightness=%d\n", __func__, brightness); */ + + if (brightness < MIN_BRIGHTNESS || + brightness > bd->props.max_brightness) { + dev_err(&bd->dev, "lcd brightness should be %d to %d. now %d\n", + MIN_BRIGHTNESS, MAX_BRIGHTNESS, brightness); + return -EINVAL; + } + + if (lcd->ldi_enable) { + /* ret = update_brightness(lcd, 0); */ + if (ret < 0) { + dev_err(lcd->dev, "err in %s\n", __func__); + return -EINVAL; + } + } + + return ret; +} + +static struct lcd_ops s6e8ax0_lcd_ops = { + .set_power = s6e8ax0_set_power, + .get_power = s6e8ax0_get_power, +}; + +static const struct backlight_ops s6e8ax0_backlight_ops = { + .update_status = s6e8ax0_set_brightness, +}; + +static ssize_t power_reduce_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + char temp[3]; + + sprintf(temp, "%d\n", lcd->acl_enable); + strcpy(buf, temp); + + return strlen(buf); +} + +static ssize_t power_reduce_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + int value; + int rc; + + rc = strict_strtoul(buf, (unsigned int)0, (unsigned long *)&value); + if (rc < 0) + return rc; + else { + if (lcd->acl_enable != value) { + dev_info(dev, "%s - %d, %d\n", __func__, lcd->acl_enable, value); + mutex_lock(&lcd->bl_lock); + lcd->acl_enable = value; + /* if (lcd->ldi_enable) + s6e8ax0_set_acl(lcd); */ + mutex_unlock(&lcd->bl_lock); + } + } + return size; +} + +static DEVICE_ATTR(power_reduce, 0664, power_reduce_show, power_reduce_store); + +static ssize_t lcd_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + char temp[15]; + sprintf(temp, "SMD_AMS480GZ01-0\n"); + strcat(buf, temp); + return strlen(buf); +} + +static DEVICE_ATTR(lcd_type, 0444, lcd_type_show, NULL); + +static ssize_t auto_brightness_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + char temp[3]; + + sprintf(temp, "%d\n", lcd->auto_brightness); + strcpy(buf, temp); + + return strlen(buf); +} + +static ssize_t auto_brightness_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + int value; + int rc; + + rc = strict_strtoul(buf, (unsigned int)0, (unsigned long *)&value); + if (rc < 0) + return rc; + else { + if (lcd->auto_brightness != value) { + dev_info(dev, "%s - %d, %d\n", __func__, lcd->auto_brightness, value); + mutex_lock(&lcd->bl_lock); + lcd->auto_brightness = value; + mutex_unlock(&lcd->bl_lock); + /* if (lcd->ldi_enable) + update_brightness(lcd, 0); */ + } + } + return size; +} + +static DEVICE_ATTR(auto_brightness, 0644, auto_brightness_show, auto_brightness_store); + +#ifdef CONFIG_HAS_EARLYSUSPEND +struct lcd_info *g_lcd; + +void s6e8ax0_early_suspend(void) +{ + struct lcd_info *lcd = g_lcd; + + set_dsim_lcd_enabled(0); + + dev_info(&lcd->ld->dev, "+%s\n", __func__); + s6e8ax0_power(lcd, FB_BLANK_POWERDOWN); + dev_info(&lcd->ld->dev, "-%s\n", __func__); + + return ; +} + +void s6e8ax0_late_resume(void) +{ + struct lcd_info *lcd = g_lcd; + + dev_info(&lcd->ld->dev, "+%s\n", __func__); + s6e8ax0_power(lcd, FB_BLANK_UNBLANK); + dev_info(&lcd->ld->dev, "-%s\n", __func__); + + set_dsim_lcd_enabled(1); + + return ; +} +#endif + +static int s6e8ax0_read_mtp(struct lcd_info *lcd, u8 *mtp_data) +{ + int ret, i; + + for (i = 0; i < 3; i++) + ret = s6e8ax0_read(lcd, LDI_MTP_ADDR+i, LDI_MTP_LENGTH, mtp_data, 0); + + return ret; +} + +static void s6e8ax0_read_id(struct lcd_info *lcd, u8 *buf) +{ + int ret = 0; + + ret = s6e8ax0_read(lcd, LDI_ID_REG, LDI_ID_LEN, buf, 3); + if (!ret) { + lcd->connected = 0; + dev_info(&lcd->ld->dev, "panel is not connected well\n"); + } +} + +static int s6e8ax0_probe(struct device *dev) +{ + int ret = 0; + struct lcd_info *lcd; + u8 mtp_data[LDI_MTP_LENGTH] = {0,}; + + lcd = kzalloc(sizeof(struct lcd_info), GFP_KERNEL); + if (!lcd) { + pr_err("failed to allocate for lcd\n"); + ret = -ENOMEM; + goto err_alloc; + } + + g_lcd = lcd; + + lcd->ld = lcd_device_register("panel", dev, lcd, &s6e8ax0_lcd_ops); + if (IS_ERR(lcd->ld)) { + pr_err("failed to register lcd device\n"); + ret = PTR_ERR(lcd->ld); + goto out_free_lcd; + } + + lcd->bd = backlight_device_register("panel", dev, lcd, &s6e8ax0_backlight_ops, NULL); + if (IS_ERR(lcd->bd)) { + pr_err("failed to register backlight device\n"); + ret = PTR_ERR(lcd->bd); + goto out_free_backlight; + } + + lcd->dev = dev; + lcd->dsim = (struct dsim_global *)dev_get_drvdata(dev->parent); + lcd->bd->props.max_brightness = MAX_BRIGHTNESS; + lcd->bd->props.brightness = DEFAULT_BRIGHTNESS; + lcd->bl = DEFAULT_GAMMA_LEVEL; + lcd->current_bl = lcd->bl; + + lcd->acl_enable = 0; + lcd->cur_acl = 0; + + lcd->power = FB_BLANK_UNBLANK; + lcd->ldi_enable = 1; + lcd->connected = 1; + lcd->auto_brightness = 0; + + ret = device_create_file(&lcd->ld->dev, &dev_attr_power_reduce); + if (ret < 0) + dev_err(&lcd->ld->dev, "failed to add sysfs entries, %d\n", __LINE__); + + ret = device_create_file(&lcd->ld->dev, &dev_attr_lcd_type); + if (ret < 0) + dev_err(&lcd->ld->dev, "failed to add sysfs entries, %d\n", __LINE__); + + ret = device_create_file(&lcd->bd->dev, &dev_attr_auto_brightness); + if (ret < 0) + dev_err(&lcd->ld->dev, "failed to add sysfs entries, %d\n", __LINE__); + + dev_set_drvdata(dev, lcd); + + mutex_init(&lcd->lock); + mutex_init(&lcd->bl_lock); + + s6e8ax0_read_id(lcd, lcd->id); + + dev_info(&lcd->ld->dev, "ID: %x, %x, %x\n", lcd->id[0], lcd->id[1], lcd->id[2]); + + dev_info(&lcd->ld->dev, "lcd panel driver has been probed.\n"); + + ret = s6e8ax0_read_mtp(lcd, mtp_data); + if (!ret) { + printk(KERN_ERR "[LCD:ERROR] : %s read mtp failed\n", __func__); + /*return -EPERM;*/ + } + + return 0; + +out_free_backlight: + lcd_device_unregister(lcd->ld); + kfree(lcd); + return ret; + +out_free_lcd: + kfree(lcd); + return ret; + +err_alloc: + return ret; +} + +static int __devexit s6e8ax0_remove(struct device *dev) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + + s6e8ax0_power(lcd, FB_BLANK_POWERDOWN); + lcd_device_unregister(lcd->ld); + backlight_device_unregister(lcd->bd); + kfree(lcd); + + return 0; +} + +/* Power down all displays on reboot, poweroff or halt. */ +static void s6e8ax0_shutdown(struct device *dev) +{ + struct lcd_info *lcd = dev_get_drvdata(dev); + + dev_info(&lcd->ld->dev, "%s\n", __func__); + + s6e8ax0_power(lcd, FB_BLANK_POWERDOWN); +} + +static struct mipi_lcd_driver s6e8ax0_mipi_driver = { + .name = "s6e8aa0", + .probe = s6e8ax0_probe, + .remove = __devexit_p(s6e8ax0_remove), + .shutdown = s6e8ax0_shutdown, +}; + +static int s6e8ax0_init(void) +{ + return s5p_dsim_register_lcd_driver(&s6e8ax0_mipi_driver); +} + +static void s6e8ax0_exit(void) +{ + return; +} + +module_init(s6e8ax0_init); +module_exit(s6e8ax0_exit); + +MODULE_DESCRIPTION("MIPI-DSI S6E8AA0:AMS529HA01 (800x1280) Panel Driver"); +MODULE_LICENSE("GPL"); |