From fc1a79d95e9038e9cf53f99c1825005b4dfaf7f4 Mon Sep 17 00:00:00 2001
From: Heiko Schocher <hs@denx.de>
Date: Sun, 12 Apr 2015 10:20:19 +0200
Subject: [PATCH] video, lg4573: add support for the lg4573 display

Signed-off-by: Heiko Schocher <hs@denx.de>
---
 drivers/video/Makefile |   1 +
 drivers/video/lg4573.c | 231 +++++++++++++++++++++++++++++++++++++++++++++++++
 include/video.h        |   4 +
 3 files changed, 236 insertions(+)
 create mode 100644 drivers/video/lg4573.c

diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 22a316b..f64918e 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -45,5 +45,6 @@ obj-$(CONFIG_VIDEO_TEGRA) += tegra.o
 obj-$(CONFIG_VIDEO_VCXK) += bus_vcxk.o
 obj-$(CONFIG_VIDEO_VESA) += vesa_fb.o
 obj-$(CONFIG_FORMIKE) += formike.o
+obj-$(CONFIG_LG4573) += lg4573.o
 obj-$(CONFIG_AM335X_LCD) += am335x-fb.o
 obj-$(CONFIG_VIDEO_PARADE) += parade.o
diff --git a/drivers/video/lg4573.c b/drivers/video/lg4573.c
new file mode 100644
index 0000000..43670fc
--- /dev/null
+++ b/drivers/video/lg4573.c
@@ -0,0 +1,231 @@
+/*
+ * LCD: LG4573, TFT 4.3", 480x800, RGB24
+ * LCD initialization via SPI
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ *
+ */
+#include <common.h>
+#include <errno.h>
+#include <spi.h>
+
+#define PWR_ON_DELAY_MSECS  120
+
+static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val)
+{
+	unsigned long flags = SPI_XFER_BEGIN;
+	unsigned short buf16 = htons(val);
+	int ret = 0;
+
+	flags |= SPI_XFER_END;
+
+	ret = spi_xfer(spi, 16, &buf16, NULL, flags);
+	if (ret)
+		debug("%s: Failed to send: %d\n", __func__, ret);
+
+	return ret;
+}
+
+static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff,
+					int size)
+{
+	int i;
+
+	for (i = 0; i < size; i++)
+		lb043wv_spi_write_u16(spi, buff[i]);
+}
+
+static void lb043wv_display_mode_settings(struct spi_slave *spi)
+{
+	static u16 display_mode_settings[] = {
+	  0x703A,
+	  0x7270,
+	  0x70B1,
+	  0x7208,
+	  0x723B,
+	  0x720F,
+	  0x70B2,
+	  0x7200,
+	  0x72C8,
+	  0x70B3,
+	  0x7200,
+	  0x70B4,
+	  0x7200,
+	  0x70B5,
+	  0x7242,
+	  0x7210,
+	  0x7210,
+	  0x7200,
+	  0x7220,
+	  0x70B6,
+	  0x720B,
+	  0x720F,
+	  0x723C,
+	  0x7213,
+	  0x7213,
+	  0x72E8,
+	  0x70B7,
+	  0x7246,
+	  0x7206,
+	  0x720C,
+	  0x7200,
+	  0x7200,
+	};
+
+	debug("transfer display mode settings\n");
+	lb043wv_spi_write_u16_array(spi, display_mode_settings,
+				    ARRAY_SIZE(display_mode_settings));
+}
+
+static void lb043wv_power_settings(struct spi_slave *spi)
+{
+	static u16 power_settings[] = {
+	  0x70C0,
+	  0x7201,
+	  0x7211,
+	  0x70C3,
+	  0x7207,
+	  0x7203,
+	  0x7204,
+	  0x7204,
+	  0x7204,
+	  0x70C4,
+	  0x7212,
+	  0x7224,
+	  0x7218,
+	  0x7218,
+	  0x7202,
+	  0x7249,
+	  0x70C5,
+	  0x726F,
+	  0x70C6,
+	  0x7241,
+	  0x7263,
+	};
+
+	debug("transfer power settings\n");
+	lb043wv_spi_write_u16_array(spi, power_settings,
+				    ARRAY_SIZE(power_settings));
+}
+
+static void lb043wv_gamma_settings(struct spi_slave *spi)
+{
+	static u16 gamma_settings[] = {
+	  0x70D0,
+	  0x7203,
+	  0x7207,
+	  0x7273,
+	  0x7235,
+	  0x7200,
+	  0x7201,
+	  0x7220,
+	  0x7200,
+	  0x7203,
+	  0x70D1,
+	  0x7203,
+	  0x7207,
+	  0x7273,
+	  0x7235,
+	  0x7200,
+	  0x7201,
+	  0x7220,
+	  0x7200,
+	  0x7203,
+	  0x70D2,
+	  0x7203,
+	  0x7207,
+	  0x7273,
+	  0x7235,
+	  0x7200,
+	  0x7201,
+	  0x7220,
+	  0x7200,
+	  0x7203,
+	  0x70D3,
+	  0x7203,
+	  0x7207,
+	  0x7273,
+	  0x7235,
+	  0x7200,
+	  0x7201,
+	  0x7220,
+	  0x7200,
+	  0x7203,
+	  0x70D4,
+	  0x7203,
+	  0x7207,
+	  0x7273,
+	  0x7235,
+	  0x7200,
+	  0x7201,
+	  0x7220,
+	  0x7200,
+	  0x7203,
+	  0x70D5,
+	  0x7203,
+	  0x7207,
+	  0x7273,
+	  0x7235,
+	  0x7200,
+	  0x7201,
+	  0x7220,
+	  0x7200,
+	  0x7203,
+	};
+
+	debug("transfer gamma settings\n");
+	lb043wv_spi_write_u16_array(spi, gamma_settings,
+				    ARRAY_SIZE(gamma_settings));
+}
+
+static void lb043wv_display_on(struct spi_slave *spi)
+{
+	static u16 sleep_out = 0x7011;
+	static u16 display_on = 0x7029;
+
+	lb043wv_spi_write_u16(spi, sleep_out);
+	mdelay(PWR_ON_DELAY_MSECS);
+	lb043wv_spi_write_u16(spi, display_on);
+}
+
+int lg4573_spi_startup(unsigned int bus, unsigned int cs,
+	unsigned int max_hz, unsigned int spi_mode)
+{
+	struct spi_slave *spi;
+	int ret;
+
+	spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
+	if (!spi) {
+		debug("%s: Failed to set up slave\n", __func__);
+		return -1;
+	}
+
+	ret = spi_claim_bus(spi);
+	if (ret) {
+		debug("%s: Failed to claim SPI bus: %d\n", __func__, ret);
+		goto err_claim_bus;
+	}
+
+	lb043wv_display_mode_settings(spi);
+	lb043wv_power_settings(spi);
+	lb043wv_gamma_settings(spi);
+
+	lb043wv_display_on(spi);
+	return 0;
+err_claim_bus:
+	spi_free_slave(spi);
+	return -1;
+}
+
+static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	lg4573_spi_startup(0, 0, 10000000, SPI_MODE_0);
+	return 0;
+}
+
+U_BOOT_CMD(
+	lgset,	2,	1,	do_lgset,
+	"set lgdisplay",
+	""
+);
diff --git a/include/video.h b/include/video.h
index 673aa2e..65e4ec1 100644
--- a/include/video.h
+++ b/include/video.h
@@ -69,4 +69,8 @@ void video_clear(void);
 int kwh043st20_f01_spi_startup(unsigned int bus, unsigned int cs,
 	unsigned int max_hz, unsigned int spi_mode);
 #endif
+#if defined(CONFIG_LG4573)
+int lg4573_spi_startup(unsigned int bus, unsigned int cs,
+	unsigned int max_hz, unsigned int spi_mode);
+#endif
 #endif