S5PC11X: LCD: Add new lcd driver to support the TFT LCD

Add nt35580 lcd driver to support the TFT LCD version

Change-Id: I5939042ffe4e47ebc5133e1084c6d2f4db377f70
Signed-off-by: sl47.kim <sl47.kim@samsung.com>

4 files changed, 309 insertions, 0 deletions

diff --git a/drivers/video/samsung/Kconfig b/drivers/video/samsung/Kconfig
index 0f0b5f5..f0d9511 100644..100755
--- a/drivers/video/samsung/Kconfig
+++ b/drivers/video/samsung/Kconfig
@@ -94,6 +94,15 @@ config FB_S3C_TL2796
         ---help---
           This enables support for Samsung TL2796 WVGA LCD panel
 
+config FB_S3C_NT35580
+        bool "NT35580"
+        depends on FB_S3C
+        select SPI
+        select SPI_GPIO
+        select SPI_BITBANG
+        ---help---
+          This enables support for SONY NT35580 WVGA LCD panel
+
 config FB_S3C_LVDS
 	bool "LVDS"
 	depends on FB_S3C && (ARCH_S5PV210)
diff --git a/drivers/video/samsung/Makefile b/drivers/video/samsung/Makefile
index e317c86..d4f5271 100644
--- a/drivers/video/samsung/Makefile
+++ b/drivers/video/samsung/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_FB_S3C_LTE480WV)	+= s3cfb_lte480wv.o
 obj-$(CONFIG_FB_S3C_LVDS)       += s3cfb_lvds.o
 obj-$(CONFIG_FB_S3C_HT101HD1)   += s3cfb_ht101hd1.o
 obj-$(CONFIG_FB_S3C_TL2796)     += s3cfb_tl2796.o
+obj-$(CONFIG_FB_S3C_NT35580)     += s3cfb_nt35580.o
 obj-$(CONFIG_FB_S3C_AMS701KA)	+= s3cfb_ams701ka.o
 obj-$(CONFIG_FB_S3C_MDNIE)      += s3cfb_mdnie.o s3cfb_ielcd.o
 obj-$(CONFIG_FB_S3C_CMC623)     += tune_cmc623.o
diff --git a/drivers/video/samsung/s3cfb_nt35580.c b/drivers/video/samsung/s3cfb_nt35580.c
new file mode 100755
index 0000000..aad5b32
--- /dev/null
+++ b/drivers/video/samsung/s3cfb_nt35580.c
@@ -0,0 +1,273 @@
+/*
+ * nt35580 TFT Panel Driver for the Samsung Universal board
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/wait.h>
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/lcd.h>
+#include <linux/backlight.h>
+#include <linux/nt35580.h>
+#include <plat/gpio-cfg.h>
+#include <plat/regs-fb.h>
+#include <linux/earlysuspend.h>
+
+#define PWM_REG_OFFSET		1
+#define NT35580_POWERON_DELAY	150
+
+struct s5p_lcd {
+	int ldi_enable;
+	int bl;
+	struct mutex lock;
+	struct device *dev;
+	struct spi_device *g_spi;
+	struct s5p_tft_panel_data *data;
+	struct backlight_device *bl_dev;
+	struct early_suspend early_suspend;
+};
+
+static int nt35580_spi_write_driver(struct s5p_lcd *lcd, u16 reg)
+{
+	u16 buf;
+	int ret;
+	struct spi_message msg;
+
+	struct spi_transfer xfer = {
+		.len	= 2,
+		.tx_buf	= &buf,
+	};
+
+	buf = reg;
+
+	spi_message_init(&msg);
+	spi_message_add_tail(&xfer, &msg);
+
+	ret = spi_sync(lcd->g_spi, &msg);
+
+	if (ret < 0)
+		pr_err("%s: error: spi_sync (%d)", __func__, ret);
+
+	return ret;
+}
+
+static void nt35580_panel_send_sequence(struct s5p_lcd *lcd,
+	const u16 *wbuf)
+{
+	int i = 0;
+
+	while ((wbuf[i] & DEFMASK) != ENDDEF)
+		if ((wbuf[i] & DEFMASK) != SLEEPMSEC) {
+			nt35580_spi_write_driver(lcd, wbuf[i]);
+			i += 1;
+		} else {
+			msleep(wbuf[i+1]);
+			i += 2;
+		}
+}
+
+static void update_brightness(struct s5p_lcd *lcd, int level)
+{
+	struct s5p_tft_panel_data *pdata = lcd->data;
+
+	pdata->brightness_set[PWM_REG_OFFSET] = 0x100 | (level & 0xff);
+
+	nt35580_panel_send_sequence(lcd, pdata->brightness_set);
+}
+
+static void nt35580_ldi_enable(struct s5p_lcd *lcd)
+{
+	struct s5p_tft_panel_data *pdata = lcd->data;
+
+	mutex_lock(&lcd->lock);
+
+	msleep(NT35580_POWERON_DELAY);
+
+	nt35580_panel_send_sequence(lcd, pdata->seq_set);
+	update_brightness(lcd, lcd->bl);
+	nt35580_panel_send_sequence(lcd, pdata->display_on);
+
+	lcd->ldi_enable = 1;
+
+	mutex_unlock(&lcd->lock);
+}
+
+static void nt35580_ldi_disable(struct s5p_lcd *lcd)
+{
+	struct s5p_tft_panel_data *pdata = lcd->data;
+
+	mutex_lock(&lcd->lock);
+
+	lcd->ldi_enable = 0;
+	nt35580_panel_send_sequence(lcd, pdata->display_off);
+	nt35580_panel_send_sequence(lcd, pdata->sleep_in);
+
+	mutex_unlock(&lcd->lock);
+}
+
+static int s5p_bl_update_status(struct backlight_device *bd)
+{
+	struct s5p_lcd *lcd = bl_get_data(bd);
+	int bl = bd->props.brightness;
+
+	pr_debug("\nupdate status brightness %d\n",
+				bd->props.brightness);
+
+	if (bl < 0 || bl > 255)
+		return -EINVAL;
+
+	mutex_lock(&lcd->lock);
+
+	lcd->bl = bl;
+
+	if (lcd->ldi_enable) {
+		pr_debug("\n bl :%d\n", bl);
+		update_brightness(lcd, bl);
+	}
+
+	mutex_unlock(&lcd->lock);
+
+	return 0;
+}
+
+const struct backlight_ops s5p_bl_tft_ops = {
+	.update_status = s5p_bl_update_status,
+};
+
+void nt35580_early_suspend(struct early_suspend *h)
+{
+	struct s5p_lcd *lcd = container_of(h, struct s5p_lcd,
+								early_suspend);
+
+	nt35580_ldi_disable(lcd);
+
+	return;
+}
+void nt35580_late_resume(struct early_suspend *h)
+{
+	struct s5p_lcd *lcd = container_of(h, struct s5p_lcd,
+								early_suspend);
+
+	nt35580_ldi_enable(lcd);
+
+	return;
+}
+static int __devinit nt35580_probe(struct spi_device *spi)
+{
+	struct s5p_lcd *lcd;
+	int ret;
+
+	lcd = kzalloc(sizeof(*lcd), GFP_KERNEL);
+	if (!lcd) {
+		pr_err("failed to allocate for lcd\n");
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
+	mutex_init(&lcd->lock);
+
+	spi->bits_per_word = 9;
+	if (spi_setup(spi)) {
+		pr_err("failed to setup spi\n");
+		ret = -EINVAL;
+		goto err_setup;
+	}
+
+	lcd->g_spi = spi;
+	lcd->dev = &spi->dev;
+	lcd->bl = 255;
+
+	if (!spi->dev.platform_data) {
+		dev_err(lcd->dev, "failed to get platform data\n");
+		ret = -EINVAL;
+		goto err_setup;
+	}
+	lcd->data = (struct s5p_tft_panel_data *)spi->dev.platform_data;
+
+	if (!lcd->data->seq_set || !lcd->data->display_on ||
+		!lcd->data->display_off || !lcd->data->sleep_in ||
+		!lcd->data->brightness_set) {
+		dev_err(lcd->dev, "Invalid platform data\n");
+		ret = -EINVAL;
+		goto err_setup;
+	}
+
+	lcd->bl_dev = backlight_device_register("s5p_bl",
+			&spi->dev, lcd, &s5p_bl_tft_ops, NULL);
+	if (!lcd->bl_dev) {
+		dev_err(lcd->dev, "failed to register backlight\n");
+		ret = -EINVAL;
+		goto err_setup;
+	}
+
+	lcd->bl_dev->props.max_brightness = 255;
+	spi_set_drvdata(spi, lcd);
+
+	nt35580_ldi_enable(lcd);
+#ifdef CONFIG_HAS_EARLYSUSPEND
+	lcd->early_suspend.suspend = nt35580_early_suspend;
+	lcd->early_suspend.resume = nt35580_late_resume;
+	lcd->early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB - 1;
+	register_early_suspend(&lcd->early_suspend);
+#endif
+	pr_info("%s successfully probed\n", __func__);
+
+	return 0;
+
+err_setup:
+	mutex_destroy(&lcd->lock);
+	kfree(lcd);
+
+err_alloc:
+	return ret;
+}
+
+static int __devexit nt35580_remove(struct spi_device *spi)
+{
+	struct s5p_lcd *lcd = spi_get_drvdata(spi);
+
+	unregister_early_suspend(&lcd->early_suspend);
+
+	backlight_device_unregister(lcd->bl_dev);
+
+	nt35580_ldi_disable(lcd);
+
+	kfree(lcd);
+
+	return 0;
+}
+
+static struct spi_driver nt35580_driver = {
+	.driver = {
+		.name	= "nt35580",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= nt35580_probe,
+	.remove		= __devexit_p(nt35580_remove),
+};
+
+static int __init nt35580_init(void)
+{
+	return spi_register_driver(&nt35580_driver);
+}
+static void __exit nt35580_exit(void)
+{
+	spi_unregister_driver(&nt35580_driver);
+}
+
+module_init(nt35580_init);
+module_exit(nt35580_exit);
diff --git a/include/linux/nt35580.h b/include/linux/nt35580.h
new file mode 100755
index 0000000..2791cfa
--- /dev/null
+++ b/include/linux/nt35580.h
@@ -0,0 +1,26 @@
+/*include/linux/nt35580.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * Header file for Sony LCD Panel(TFT) 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/types.h>
+
+#define SLEEPMSEC		0x1000
+#define ENDDEF			0x2000
+#define DEFMASK		0xFF00
+
+struct s5p_tft_panel_data {
+	const u16 *seq_set;
+	const u16 *sleep_in;
+	const u16 *display_on;
+	const u16 *display_off;
+	u16 *brightness_set;
+};
+
+