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Diffstat (limited to 'drivers/video/samsung/s3cfb_nt71391.c')
-rw-r--r--drivers/video/samsung/s3cfb_nt71391.c415
1 files changed, 415 insertions, 0 deletions
diff --git a/drivers/video/samsung/s3cfb_nt71391.c b/drivers/video/samsung/s3cfb_nt71391.c
new file mode 100644
index 0000000..921544a
--- /dev/null
+++ b/drivers/video/samsung/s3cfb_nt71391.c
@@ -0,0 +1,415 @@
+/* linux/drivers/video/samsung/s3cfb_nt71391.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * NT71391 : 8" WXGA Landscape LCD module 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/delay.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/kernel.h>
+#include <linux/lcd.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/wait.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 "s3cfb.h"
+#include "s5p-dsim.h"
+
+#define NT71391_CHANGE_MINI_LVDS_FREQ_MIPI 1
+
+#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
+
+struct lcd_info {
+ struct device *dev;
+ unsigned int ldi_enable;
+ unsigned int power;
+ unsigned int connected;
+ struct mutex lock;
+ struct lcd_device *ld;
+ struct lcd_platform_data *lcd_pd;
+ struct dsim_global *dsim;
+};
+
+#ifdef NT71391_CHANGE_MINI_LVDS_FREQ_MIPI
+
+#define NT71391_TCON_REG_ADD 0xAC
+#define NT71391_TCON_REG_CHECKSUM 0xFF
+#define NT71931_N_16 0x18
+#define NT71931_N_17 0x19
+#define NT71931_N_18 0x1A
+#define NT71931_N_19 0x1B
+#define NT71931_N_20 0x1C
+#define NT71931_N_21 0x1D
+#define NT71931_N_22 0x1E
+#define NT71931_N_23 0x1F
+#define NT71931_N_24 0x10
+#define NT71931_N_25 0x11
+
+
+enum NT71391_COMMAND_TYPE {
+ NT71391_LOCK_CMD2 = 0x03,
+ NT71391_READ = 0x14,
+ NT71391_WRITE = 0x23,
+};
+
+
+static const unsigned char NT71391_UNLOCK_PAGE0[] = {
+ 0xF3,0xA0
+};
+
+static const unsigned char NT71391_UNLOCK_PAGE1[] = {
+ 0xF3,0xA1
+};
+
+static const unsigned char NT71391_FREQ_SETTING[] = {
+ NT71391_TCON_REG_ADD,NT71931_N_16
+};
+
+static const unsigned char TESTA[] = {
+ 0x2B,0xC0
+};
+
+static int _nt71391_write(struct lcd_info *lcd, const unsigned char *seq, enum NT71391_COMMAND_TYPE cmd_type)
+{
+ const unsigned char *wbuf;
+ int ret = 0;
+
+ if (!lcd->connected)
+ return 0;
+
+ mutex_lock(&lcd->lock);
+
+ wbuf = seq;
+
+ switch (cmd_type) {
+ case NT71391_LOCK_CMD2:
+ ret = lcd->dsim->ops->cmd_write(lcd->dsim, NT71391_LOCK_CMD2,0x0,0x0);
+ break;
+ case NT71391_READ:
+ ret = lcd->dsim->ops->cmd_write(lcd->dsim, NT71391_READ,wbuf[0],0x0);
+ break;
+ case NT71391_WRITE:
+ ret = lcd->dsim->ops->cmd_write(lcd->dsim, NT71391_WRITE, wbuf[0], wbuf[1]);
+ break;
+ default:
+ dev_dbg(&lcd->ld->dev, "%s :: Invalid cmd type \n", __func__);
+ break;
+ }
+
+ mutex_unlock(&lcd->lock);
+
+ return ret;
+}
+
+static int nt71391_write(struct lcd_info *lcd, const unsigned char *seq, enum NT71391_COMMAND_TYPE cmd_type)
+{
+ int ret = 0;
+ int retry_cnt = 1;
+
+retry:
+ ret = _nt71391_write(lcd, seq, cmd_type);
+ if (!ret) {
+ if (retry_cnt) {
+ dev_dbg(&lcd->ld->dev, "%s :: retry: %d\n", __func__, retry_cnt);
+ retry_cnt--;
+ goto retry;
+ } else
+ dev_dbg(&lcd->ld->dev, "%s :: 0x%02x\n", __func__, seq[0]);
+ }
+
+ return ret;
+}
+
+static int _nt71391_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_dcs_read(lcd->dsim, addr, count, buf);
+
+ mutex_unlock(&lcd->lock);
+
+ return ret;
+}
+
+static int nt71391_read(struct lcd_info *lcd, const u8 addr, u16 count, u8 *buf, u8 retry_cnt)
+{
+ int ret = 0;
+
+read_retry:
+ ret = _nt71391_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;
+}
+#endif
+static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ char temp[15];
+ sprintf(temp, "BOE_BP080WX7\n");
+ strcat(buf, temp);
+ return strlen(buf);
+}
+
+static DEVICE_ATTR(lcd_type, 0664,
+ lcdtype_show, NULL);
+
+static ssize_t window_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ char temp[15];
+
+ sprintf(temp, "%x %x %x\n", 0x0, 0x0, 0x0);
+
+ strcat(buf, temp);
+ return strlen(buf);
+}
+
+static DEVICE_ATTR(window_type, 0444,
+ window_type_show, NULL);
+
+static int nt71391_power_on(struct lcd_info *lcd)
+{
+
+#ifdef NT71391_CHANGE_MINI_LVDS_FREQ_MIPI
+ int ret = 0;
+ struct lcd_platform_data *pd = NULL;
+ pd = lcd->lcd_pd;
+
+ dev_info(&lcd->ld->dev, "%s\n", __func__);
+
+ msleep(120); /* power on 50ms, i2c 70ms */
+ nt71391_write(lcd, NT71391_UNLOCK_PAGE0, NT71391_WRITE);
+ nt71391_write(lcd, NT71391_FREQ_SETTING, NT71391_WRITE);
+ nt71391_write(lcd, NULL, NT71391_LOCK_CMD2);
+
+
+ lcd->dsim->ops->cmd_write(lcd->dsim, TURN_ON, 0, 0);
+#else
+ int ret = 0;
+ struct lcd_platform_data *pd = NULL;
+ pd = lcd->lcd_pd;
+
+ dev_info(&lcd->ld->dev, "%s\n", __func__);
+
+ msleep(120); /* power on 50ms, i2c 70ms */
+
+ lcd->dsim->ops->cmd_write(lcd->dsim, TURN_ON, 0, 0);
+#endif
+
+ lcd->ldi_enable = 1;
+
+ return ret;
+}
+
+static int nt71391_power_off(struct lcd_info *lcd)
+{
+ int ret = 0;
+
+ dev_info(&lcd->ld->dev, "%s\n", __func__);
+
+ lcd->ldi_enable = 0;
+
+ msleep(135);
+
+ return ret;
+}
+
+static int nt71391_power(struct lcd_info *lcd, int power)
+{
+ int ret = 0;
+
+ if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
+ ret = nt71391_power_on(lcd);
+ else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
+ ret = nt71391_power_off(lcd);
+
+ if (!ret)
+ lcd->power = power;
+
+ return ret;
+}
+
+static int nt71391_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 nt71391_power(lcd, power);
+}
+
+static int nt71391_get_power(struct lcd_device *ld)
+{
+ struct lcd_info *lcd = lcd_get_data(ld);
+
+ return lcd->power;
+}
+
+static struct lcd_ops nt71391_lcd_ops = {
+ .set_power = nt71391_set_power,
+ .get_power = nt71391_get_power,
+};
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+extern void (*lcd_early_suspend)(void);
+extern void (*lcd_late_resume)(void);
+
+struct lcd_info *g_lcd;
+
+void nt71391_early_suspend(void)
+{
+ struct lcd_info *lcd = g_lcd;
+ int err = 0;
+
+ set_dsim_lcd_enabled(0);
+
+ dev_info(&lcd->ld->dev, "+%s\n", __func__);
+
+ nt71391_power(lcd, FB_BLANK_POWERDOWN);
+
+ dev_info(&lcd->ld->dev, "-%s\n", __func__);
+
+ return ;
+}
+
+void nt71391_late_resume(void)
+{
+ struct lcd_info *lcd = g_lcd;
+
+ dev_info(&lcd->ld->dev, "+%s\n", __func__);
+
+ nt71391_power(lcd, FB_BLANK_UNBLANK);
+
+ dev_info(&lcd->ld->dev, "-%s\n", __func__);
+
+ set_dsim_lcd_enabled(1);
+
+ return ;
+}
+#endif
+
+
+static int __init nt71391_probe(struct device *dev)
+{
+ struct lcd_info *lcd;
+ int ret = 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, &nt71391_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->dev = dev;
+ lcd->connected = 1;
+ lcd->dsim = (struct dsim_global *)dev_get_drvdata(dev->parent);
+ lcd->power = FB_BLANK_UNBLANK;
+
+ mutex_init(&lcd->lock);
+
+ dev_set_drvdata(dev, lcd);
+
+ dev_info(dev, "lcd panel driver has been probed.\n");
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ lcd_early_suspend = nt71391_early_suspend;
+ lcd_late_resume = nt71391_late_resume;
+#endif
+
+ ret = device_create_file(&lcd->ld->dev, &dev_attr_lcd_type);
+ if (ret < 0)
+ dev_err(&lcd->ld->dev, "failed to add sysfs entries\n");
+
+ ret = device_create_file(&lcd->ld->dev, &dev_attr_window_type);
+ if (ret < 0)
+ dev_err(&lcd->ld->dev, "failed to add window_type entries\n");
+
+ return 0;
+
+out_free_lcd:
+ kfree(lcd);
+err_alloc:
+ return ret;
+}
+
+static int __devexit nt71391_remove(struct device *dev)
+{
+ struct lcd_info *lcd = dev_get_drvdata(dev);
+
+ nt71391_power(lcd, FB_BLANK_POWERDOWN);
+ lcd_device_unregister(lcd->ld);
+ kfree(lcd);
+
+ return 0;
+}
+
+static void nt71391_shutdown(struct device *dev)
+{
+ struct lcd_info *lcd = dev_get_drvdata(dev);
+
+ nt71391_power(lcd, FB_BLANK_POWERDOWN);
+}
+
+static struct mipi_lcd_driver nt71391_mipi_driver = {
+ .name = "nt71391",
+ .probe = nt71391_probe,
+ .remove = __devexit_p(nt71391_remove),
+ .shutdown = nt71391_shutdown,
+};
+
+static int __init nt71391_init(void)
+{
+ return s5p_dsim_register_lcd_driver(&nt71391_mipi_driver);
+}
+
+static void __exit nt71391_exit(void)
+{
+ return;
+}
+
+module_init(nt71391_init);
+module_exit(nt71391_exit);
+
+MODULE_AUTHOR("SAMSUNG");
+MODULE_DESCRIPTION("NT71391 LCD driver");
+MODULE_LICENSE("GPL");