lcd: add DataImage SCF0403x LCD panel support

Add SPI-based driver for DataImage SCF0403852GGU04 and SCF0403526GGU20
LCD panels.

Cc: Tom Rini <trini@ti.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>

3 files changed, 308 insertions, 0 deletions

diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index fed1c9c..a7f5469 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_FSL_DIU_FB) += fsl_diu_fb.o videomodes.o
 obj-$(CONFIG_L5F31188) += l5f31188.o
 obj-$(CONFIG_MPC8XX_LCD) += mpc8xx_lcd.o
 obj-$(CONFIG_PXA_LCD) += pxa_lcd.o
+obj-$(CONFIG_SCF0403_LCD) += scf0403_lcd.o
 obj-$(CONFIG_S6E8AX0) += s6e8ax0.o
 obj-$(CONFIG_S6E63D6) += s6e63d6.o
 obj-$(CONFIG_LD9040) += ld9040.o
diff --git a/drivers/video/scf0403_lcd.c b/drivers/video/scf0403_lcd.c
new file mode 100644
index 0000000..2bc8bca
--- /dev/null
+++ b/drivers/video/scf0403_lcd.c
@@ -0,0 +1,296 @@
+/*
+ * scf0403.c -- support for DataImage SCF0403 LCD
+ *
+ * Copyright (c) 2013 Adapted from Linux driver:
+ * Copyright (c) 2012 Anders Electronics plc. All Rights Reserved.
+ * Copyright (c) 2012 CompuLab, Ltd
+ *           Dmitry Lifshitz <lifshitz@compulab.co.il>
+ *           Ilya Ledvich <ilya@compulab.co.il>
+ * Inspired by Alberto Panizzo <maramaopercheseimorto@gmail.com> &
+ *	Marek Vasut work in l4f00242t03.c
+ *
+ * U-Boot port: Nikita Kiryanov <nikita@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/gpio.h>
+#include <spi.h>
+
+struct scf0403_cmd {
+	u16 cmd;
+	u16 *params;
+	int count;
+};
+
+struct scf0403_initseq_entry {
+	struct scf0403_cmd cmd;
+	int delay_ms;
+};
+
+struct scf0403_priv {
+	struct spi_slave *spi;
+	unsigned int reset_gpio;
+	u32 rddid;
+	struct scf0403_initseq_entry *init_seq;
+	int seq_size;
+};
+
+struct scf0403_priv priv;
+
+#define SCF0403852GGU04_ID 0x000080
+
+/* SCF0403526GGU20 model commands parameters */
+static u16 extcmd_params_sn20[]		= {0xff, 0x98, 0x06};
+static u16 spiinttype_params_sn20[]	= {0x60};
+static u16 bc_params_sn20[]		= {
+		0x01, 0x10, 0x61, 0x74, 0x01, 0x01, 0x1B,
+		0x12, 0x71, 0x00, 0x00, 0x00, 0x01, 0x01,
+		0x05, 0x00, 0xFF, 0xF2, 0x01, 0x00, 0x40,
+};
+static u16 bd_params_sn20[] = {0x01, 0x23, 0x45, 0x67, 0x01, 0x23, 0x45, 0x67};
+static u16 be_params_sn20[] = {
+		0x01, 0x22, 0x22, 0xBA, 0xDC, 0x26, 0x28, 0x22,	0x22,
+};
+static u16 vcom_params_sn20[]		= {0x74};
+static u16 vmesur_params_sn20[]		= {0x7F, 0x0F, 0x00};
+static u16 powerctl_params_sn20[]	= {0x03, 0x0b, 0x00};
+static u16 lvglvolt_params_sn20[]	= {0x08};
+static u16 engsetting_params_sn20[]	= {0x00, 0x00, 0x00, 0x00, 0x00, 0x20};
+static u16 dispfunc_params_sn20[]	= {0xa0};
+static u16 dvddvolt_params_sn20[]	= {0x74};
+static u16 dispinv_params_sn20[]	= {0x00, 0x00, 0x00};
+static u16 panelres_params_sn20[]	= {0x82};
+static u16 framerate_params_sn20[]	= {0x00, 0x13, 0x13};
+static u16 timing_params_sn20[]		= {0x80, 0x05, 0x40, 0x28};
+static u16 powerctl2_params_sn20[]	= {0x17, 0x75, 0x79, 0x20};
+static u16 memaccess_params_sn20[]	= {0x00};
+static u16 pixfmt_params_sn20[]		= {0x66};
+static u16 pgamma_params_sn20[]		= {
+		0x00, 0x03, 0x0b, 0x0c, 0x0e, 0x08, 0xc5, 0x04,
+		0x08, 0x0c, 0x13, 0x11, 0x11, 0x14, 0x0c, 0x10,
+};
+static u16 ngamma_params_sn20[] = {
+		0x00, 0x0d, 0x11, 0x0c, 0x0c, 0x04, 0x76, 0x03,
+		0x08, 0x0b, 0x16, 0x10, 0x0d, 0x16, 0x0a, 0x00,
+};
+static u16 tearing_params_sn20[] = {0x00};
+
+/* SCF0403852GGU04 model commands parameters */
+static u16 memaccess_params_sn04[]	= {0x08};
+static u16 pixfmt_params_sn04[]		= {0x66};
+static u16 modectl_params_sn04[]	= {0x01};
+static u16 dispfunc_params_sn04[]	= {0x22, 0xe2, 0xFF, 0x04};
+static u16 vcom_params_sn04[]		= {0x00, 0x6A};
+static u16 pgamma_params_sn04[]		= {
+		0x00, 0x07, 0x0d, 0x10, 0x13, 0x19, 0x0f, 0x0c,
+		0x05, 0x08, 0x06, 0x13,	0x0f, 0x30, 0x20, 0x1f,
+};
+static u16 ngamma_params_sn04[]		= {
+		0x1F, 0x20, 0x30, 0x0F, 0x13, 0x06, 0x08, 0x05,
+		0x0C, 0x0F, 0x19, 0x13, 0x10, 0x0D, 0x07, 0x00,
+};
+static u16 dispinv_params_sn04[]	= {0x02};
+
+/* Common commands */
+static struct scf0403_cmd scf0403_cmd_slpout	= {0x11, NULL, 0};
+static struct scf0403_cmd scf0403_cmd_dison	= {0x29, NULL, 0};
+
+/* SCF0403852GGU04 init sequence */
+static struct scf0403_initseq_entry scf0403_initseq_sn04[] = {
+	{{0x36, memaccess_params_sn04,	ARRAY_SIZE(memaccess_params_sn04)}, 0},
+	{{0x3A, pixfmt_params_sn04,	ARRAY_SIZE(pixfmt_params_sn04)}, 0},
+	{{0xB6, dispfunc_params_sn04,	ARRAY_SIZE(dispfunc_params_sn04)}, 0},
+	{{0xC5, vcom_params_sn04,	ARRAY_SIZE(vcom_params_sn04)}, 0},
+	{{0xE0, pgamma_params_sn04,	ARRAY_SIZE(pgamma_params_sn04)}, 0},
+	{{0xE1, ngamma_params_sn04,	ARRAY_SIZE(ngamma_params_sn04)}, 20},
+	{{0xB0, modectl_params_sn04,	ARRAY_SIZE(modectl_params_sn04)}, 0},
+	{{0xB4, dispinv_params_sn04,	ARRAY_SIZE(dispinv_params_sn04)}, 100},
+};
+
+/* SCF0403526GGU20 init sequence */
+static struct scf0403_initseq_entry scf0403_initseq_sn20[] = {
+	{{0xff, extcmd_params_sn20,	ARRAY_SIZE(extcmd_params_sn20)}, 0},
+	{{0xba, spiinttype_params_sn20,	ARRAY_SIZE(spiinttype_params_sn20)}, 0},
+	{{0xbc, bc_params_sn20,		ARRAY_SIZE(bc_params_sn20)}, 0},
+	{{0xbd, bd_params_sn20,		ARRAY_SIZE(bd_params_sn20)}, 0},
+	{{0xbe, be_params_sn20,		ARRAY_SIZE(be_params_sn20)}, 0},
+	{{0xc7, vcom_params_sn20,	ARRAY_SIZE(vcom_params_sn20)}, 0},
+	{{0xed, vmesur_params_sn20,	ARRAY_SIZE(vmesur_params_sn20)}, 0},
+	{{0xc0, powerctl_params_sn20,	ARRAY_SIZE(powerctl_params_sn20)}, 0},
+	{{0xfc, lvglvolt_params_sn20,	ARRAY_SIZE(lvglvolt_params_sn20)}, 0},
+	{{0xb6, dispfunc_params_sn20,	ARRAY_SIZE(dispfunc_params_sn20)}, 0},
+	{{0xdf, engsetting_params_sn20,	ARRAY_SIZE(engsetting_params_sn20)}, 0},
+	{{0xf3, dvddvolt_params_sn20,	ARRAY_SIZE(dvddvolt_params_sn20)}, 0},
+	{{0xb4, dispinv_params_sn20,	ARRAY_SIZE(dispinv_params_sn20)}, 0},
+	{{0xf7, panelres_params_sn20,	ARRAY_SIZE(panelres_params_sn20)}, 0},
+	{{0xb1, framerate_params_sn20,	ARRAY_SIZE(framerate_params_sn20)}, 0},
+	{{0xf2, timing_params_sn20,	ARRAY_SIZE(timing_params_sn20)}, 0},
+	{{0xc1, powerctl2_params_sn20,	ARRAY_SIZE(powerctl2_params_sn20)}, 0},
+	{{0x36, memaccess_params_sn20,	ARRAY_SIZE(memaccess_params_sn20)}, 0},
+	{{0x3a, pixfmt_params_sn20,	ARRAY_SIZE(pixfmt_params_sn20)}, 0},
+	{{0xe0, pgamma_params_sn20,	ARRAY_SIZE(pgamma_params_sn20)}, 0},
+	{{0xe1, ngamma_params_sn20,	ARRAY_SIZE(ngamma_params_sn20)}, 0},
+	{{0x35, tearing_params_sn20,	ARRAY_SIZE(tearing_params_sn20)}, 0},
+};
+
+static void scf0403_gpio_reset(unsigned int gpio)
+{
+	if (!gpio_is_valid(gpio))
+		return;
+
+	gpio_set_value(gpio, 1);
+	mdelay(100);
+	gpio_set_value(gpio, 0);
+	mdelay(40);
+	gpio_set_value(gpio, 1);
+	mdelay(100);
+}
+
+static int scf0403_spi_read_rddid(struct spi_slave *spi, u32 *rddid)
+{
+	int error = 0;
+	u8 ids_buf = 0x00;
+	u16 dummy_buf = 0x00;
+	u16 cmd = 0x04;
+
+	error = spi_set_wordlen(spi, 9);
+	if (error)
+		return error;
+
+	/* Here 9 bits required to transmit a command */
+	error = spi_xfer(spi, 9, &cmd, NULL, SPI_XFER_ONCE);
+	if (error)
+		return error;
+
+	/*
+	 * Here 8 + 1 bits required to arrange extra clock cycle
+	 * before the first data bit.
+	 * According to the datasheet - first parameter is the dummy data.
+	 */
+	error = spi_xfer(spi, 9, NULL, &dummy_buf, SPI_XFER_ONCE);
+	if (error)
+		return error;
+
+	error = spi_set_wordlen(spi, 8);
+	if (error)
+		return error;
+
+	/* Read rest of the data */
+	error = spi_xfer(spi, 8, NULL, &ids_buf, SPI_XFER_ONCE);
+	if (error)
+		return error;
+
+	*rddid = ids_buf;
+
+	return 0;
+}
+
+static int scf0403_spi_transfer(struct spi_slave *spi, struct scf0403_cmd *cmd)
+{
+	int i, error;
+	u32 command = cmd->cmd;
+	u32 msg;
+
+	error = spi_set_wordlen(spi, 9);
+	if (error)
+		return error;
+
+	error = spi_xfer(spi, 9, &command, NULL, SPI_XFER_ONCE);
+	if (error)
+		return error;
+
+	for (i = 0; i < cmd->count; i++) {
+		msg = (cmd->params[i] | 0x100);
+		error = spi_xfer(spi, 9, &msg, NULL, SPI_XFER_ONCE);
+		if (error)
+			return error;
+	}
+
+	return 0;
+}
+
+static void scf0403_lcd_init(struct scf0403_priv *priv)
+{
+	int i;
+
+	/* reset LCD */
+	scf0403_gpio_reset(priv->reset_gpio);
+
+	for (i = 0; i < priv->seq_size; i++) {
+		if (scf0403_spi_transfer(priv->spi, &priv->init_seq[i].cmd) < 0)
+			puts("SPI transfer failed\n");
+
+		mdelay(priv->init_seq[i].delay_ms);
+	}
+}
+
+static int scf0403_request_reset_gpio(unsigned gpio)
+{
+	int err = gpio_request(gpio, "lcd reset");
+
+	if (err)
+		return err;
+
+	err = gpio_direction_output(gpio, 0);
+	if (err)
+		gpio_free(gpio);
+
+	return err;
+}
+
+int scf0403_init(int reset_gpio)
+{
+	int error;
+
+	if (gpio_is_valid(reset_gpio)) {
+		error = scf0403_request_reset_gpio(reset_gpio);
+		if (error) {
+			printf("Failed requesting reset GPIO%d: %d\n",
+			       reset_gpio, error);
+			return error;
+		}
+	}
+
+	priv.reset_gpio = reset_gpio;
+	priv.spi = spi_setup_slave(3, 0, 1000000, SPI_MODE_0);
+	error = spi_claim_bus(priv.spi);
+	if (error)
+		goto bus_claim_fail;
+
+	/* reset LCD */
+	scf0403_gpio_reset(reset_gpio);
+
+	error = scf0403_spi_read_rddid(priv.spi, &priv.rddid);
+	if (error) {
+		puts("IDs read failed\n");
+		goto readid_fail;
+	}
+
+	if (priv.rddid == SCF0403852GGU04_ID) {
+		priv.init_seq = scf0403_initseq_sn04;
+		priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn04);
+	} else {
+		priv.init_seq = scf0403_initseq_sn20;
+		priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn20);
+	}
+
+	scf0403_lcd_init(&priv);
+
+	/* Start operation */
+	scf0403_spi_transfer(priv.spi, &scf0403_cmd_dison);
+	mdelay(100);
+	scf0403_spi_transfer(priv.spi, &scf0403_cmd_slpout);
+	spi_release_bus(priv.spi);
+
+	return 0;
+
+readid_fail:
+	spi_release_bus(priv.spi);
+bus_claim_fail:
+	if (gpio_is_valid(priv.reset_gpio))
+		gpio_free(priv.reset_gpio);
+
+	return error;
+}
diff --git a/include/scf0403_lcd.h b/include/scf0403_lcd.h
new file mode 100644
index 0000000..d71896b
--- /dev/null
+++ b/include/scf0403_lcd.h
@@ -0,0 +1,11 @@
+/*
+ * Copyright (c) 2013, Compulab Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef SCF0403_LCD_H_
+#define SCF0403_LCD_H_
+
+int scf0403_init(int reset_gpio);
+
+#endif