OMAPDSS: Add LG.Philips LB035Q02 panel driver

Add LG.Philips LB035Q02 panel driver which uses the new DSS device model
and DSS ops.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

4 files changed, 382 insertions, 0 deletions

diff --git a/drivers/video/omap2/displays-new/Kconfig b/drivers/video/omap2/displays-new/Kconfig
index 25696583e206..3dd8bf947e16 100644
--- a/drivers/video/omap2/displays-new/Kconfig
+++ b/drivers/video/omap2/displays-new/Kconfig
@@ -44,4 +44,9 @@ config DISPLAY_PANEL_SONY_ACX565AKM
         help
           This is the LCD panel used on Nokia N900
 
+config DISPLAY_PANEL_LGPHILIPS_LB035Q02
+        tristate "LG.Philips LB035Q02 LCD Panel"
+        depends on SPI
+        help
+          LCD Panel used on the Gumstix Overo Palo35
 endmenu
diff --git a/drivers/video/omap2/displays-new/Makefile b/drivers/video/omap2/displays-new/Makefile
index c07bd1e17f47..a5ec42f1d87d 100644
--- a/drivers/video/omap2/displays-new/Makefile
+++ b/drivers/video/omap2/displays-new/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_DISPLAY_CONNECTOR_ANALOG_TV) += connector-analog-tv.o
 obj-$(CONFIG_DISPLAY_PANEL_DPI) += panel-dpi.o
 obj-$(CONFIG_DISPLAY_PANEL_DSI_CM) += panel-dsi-cm.o
 obj-$(CONFIG_DISPLAY_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
+obj-$(CONFIG_DISPLAY_PANEL_LGPHILIPS_LB035Q02) += panel-lgphilips-lb035q02.o
diff --git a/drivers/video/omap2/displays-new/panel-lgphilips-lb035q02.c b/drivers/video/omap2/displays-new/panel-lgphilips-lb035q02.c
new file mode 100644
index 000000000000..6e8977b18950
--- /dev/null
+++ b/drivers/video/omap2/displays-new/panel-lgphilips-lb035q02.c
@@ -0,0 +1,358 @@
+/*
+ * LG.Philips LB035Q02 LCD Panel driver
+ *
+ * Copyright (C) 2013 Texas Instruments
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ * Based on a driver by: Steve Sakoman <steve@sakoman.com>
+ *
+ * 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/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/mutex.h>
+#include <linux/gpio.h>
+
+#include <video/omapdss.h>
+#include <video/omap-panel-data.h>
+
+static struct omap_video_timings lb035q02_timings = {
+        .x_res = 320,
+        .y_res = 240,
+
+        .pixel_clock    = 6500,
+
+        .hsw            = 2,
+        .hfp            = 20,
+        .hbp            = 68,
+
+        .vsw            = 2,
+        .vfp            = 4,
+        .vbp            = 18,
+
+        .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
+        .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
+        .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
+        .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
+        .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
+};
+
+struct panel_drv_data {
+        struct omap_dss_device dssdev;
+        struct omap_dss_device *in;
+
+        struct spi_device *spi;
+
+        int data_lines;
+
+        struct omap_video_timings videomode;
+
+        int reset_gpio;
+        int backlight_gpio;
+        int enable_gpio;
+};
+
+#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
+
+static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
+{
+        struct spi_message msg;
+        struct spi_transfer index_xfer = {
+                .len            = 3,
+                .cs_change      = 1,
+        };
+        struct spi_transfer value_xfer = {
+                .len            = 3,
+        };
+        u8      buffer[16];
+
+        spi_message_init(&msg);
+
+        /* register index */
+        buffer[0] = 0x70;
+        buffer[1] = 0x00;
+        buffer[2] = reg & 0x7f;
+        index_xfer.tx_buf = buffer;
+        spi_message_add_tail(&index_xfer, &msg);
+
+        /* register value */
+        buffer[4] = 0x72;
+        buffer[5] = val >> 8;
+        buffer[6] = val;
+        value_xfer.tx_buf = buffer + 4;
+        spi_message_add_tail(&value_xfer, &msg);
+
+        return spi_sync(spi, &msg);
+}
+
+static void init_lb035q02_panel(struct spi_device *spi)
+{
+        /* Init sequence from page 28 of the lb035q02 spec */
+        lb035q02_write_reg(spi, 0x01, 0x6300);
+        lb035q02_write_reg(spi, 0x02, 0x0200);
+        lb035q02_write_reg(spi, 0x03, 0x0177);
+        lb035q02_write_reg(spi, 0x04, 0x04c7);
+        lb035q02_write_reg(spi, 0x05, 0xffc0);
+        lb035q02_write_reg(spi, 0x06, 0xe806);
+        lb035q02_write_reg(spi, 0x0a, 0x4008);
+        lb035q02_write_reg(spi, 0x0b, 0x0000);
+        lb035q02_write_reg(spi, 0x0d, 0x0030);
+        lb035q02_write_reg(spi, 0x0e, 0x2800);
+        lb035q02_write_reg(spi, 0x0f, 0x0000);
+        lb035q02_write_reg(spi, 0x16, 0x9f80);
+        lb035q02_write_reg(spi, 0x17, 0x0a0f);
+        lb035q02_write_reg(spi, 0x1e, 0x00c1);
+        lb035q02_write_reg(spi, 0x30, 0x0300);
+        lb035q02_write_reg(spi, 0x31, 0x0007);
+        lb035q02_write_reg(spi, 0x32, 0x0000);
+        lb035q02_write_reg(spi, 0x33, 0x0000);
+        lb035q02_write_reg(spi, 0x34, 0x0707);
+        lb035q02_write_reg(spi, 0x35, 0x0004);
+        lb035q02_write_reg(spi, 0x36, 0x0302);
+        lb035q02_write_reg(spi, 0x37, 0x0202);
+        lb035q02_write_reg(spi, 0x3a, 0x0a0d);
+        lb035q02_write_reg(spi, 0x3b, 0x0806);
+}
+
+static int lb035q02_connect(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+        int r;
+
+        if (omapdss_device_is_connected(dssdev))
+                return 0;
+
+        r = in->ops.dpi->connect(in, dssdev);
+        if (r)
+                return r;
+
+        init_lb035q02_panel(ddata->spi);
+
+        return 0;
+}
+
+static void lb035q02_disconnect(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        if (!omapdss_device_is_connected(dssdev))
+                return;
+
+        in->ops.dpi->disconnect(in, dssdev);
+}
+
+static int lb035q02_enable(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+        int r;
+
+        if (!omapdss_device_is_connected(dssdev))
+                return -ENODEV;
+
+        if (omapdss_device_is_enabled(dssdev))
+                return 0;
+
+        in->ops.dpi->set_data_lines(in, ddata->data_lines);
+        in->ops.dpi->set_timings(in, &ddata->videomode);
+
+        r = in->ops.dpi->enable(in);
+        if (r)
+                return r;
+
+        if (gpio_is_valid(ddata->enable_gpio))
+                gpio_set_value_cansleep(ddata->enable_gpio, 1);
+
+        if (gpio_is_valid(ddata->backlight_gpio))
+                gpio_set_value_cansleep(ddata->backlight_gpio, 1);
+
+        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+        return 0;
+}
+
+static void lb035q02_disable(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        if (!omapdss_device_is_enabled(dssdev))
+                return;
+
+        if (gpio_is_valid(ddata->enable_gpio))
+                gpio_set_value_cansleep(ddata->enable_gpio, 0);
+
+        if (gpio_is_valid(ddata->backlight_gpio))
+                gpio_set_value_cansleep(ddata->backlight_gpio, 0);
+
+        in->ops.dpi->disable(in);
+
+        dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void lb035q02_set_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        ddata->videomode = *timings;
+        dssdev->panel.timings = *timings;
+
+        in->ops.dpi->set_timings(in, timings);
+}
+
+static void lb035q02_get_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+        *timings = ddata->videomode;
+}
+
+static int lb035q02_check_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        return in->ops.dpi->check_timings(in, timings);
+}
+
+static struct omap_dss_driver lb035q02_ops = {
+        .connect        = lb035q02_connect,
+        .disconnect     = lb035q02_disconnect,
+
+        .enable         = lb035q02_enable,
+        .disable        = lb035q02_disable,
+
+        .set_timings    = lb035q02_set_timings,
+        .get_timings    = lb035q02_get_timings,
+        .check_timings  = lb035q02_check_timings,
+
+        .get_resolution = omapdss_default_get_resolution,
+};
+
+static int lb035q02_probe_pdata(struct spi_device *spi)
+{
+        const struct panel_lb035q02_platform_data *pdata;
+        struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+        struct omap_dss_device *dssdev, *in;
+
+        pdata = dev_get_platdata(&spi->dev);
+
+        in = omap_dss_find_output(pdata->source);
+        if (in == NULL) {
+                dev_err(&spi->dev, "failed to find video source '%s'\n",
+                                pdata->source);
+                return -EPROBE_DEFER;
+        }
+
+        ddata->in = in;
+
+        ddata->data_lines = pdata->data_lines;
+
+        dssdev = &ddata->dssdev;
+        dssdev->name = pdata->name;
+
+        ddata->enable_gpio = pdata->enable_gpio;
+        ddata->backlight_gpio = pdata->backlight_gpio;
+
+        return 0;
+}
+
+static int lb035q02_panel_spi_probe(struct spi_device *spi)
+{
+        struct panel_drv_data *ddata;
+        struct omap_dss_device *dssdev;
+        int r;
+
+        ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
+        if (ddata == NULL)
+                return -ENOMEM;
+
+        dev_set_drvdata(&spi->dev, ddata);
+
+        ddata->spi = spi;
+
+        if (dev_get_platdata(&spi->dev)) {
+                r = lb035q02_probe_pdata(spi);
+                if (r)
+                        return r;
+        } else {
+                return -ENODEV;
+        }
+
+        if (gpio_is_valid(ddata->enable_gpio)) {
+                r = devm_gpio_request_one(&spi->dev, ddata->enable_gpio,
+                                GPIOF_OUT_INIT_LOW, "panel enable");
+                if (r)
+                        goto err_gpio;
+        }
+
+        if (gpio_is_valid(ddata->backlight_gpio)) {
+                r = devm_gpio_request_one(&spi->dev, ddata->backlight_gpio,
+                                GPIOF_OUT_INIT_LOW, "panel backlight");
+                if (r)
+                        goto err_gpio;
+        }
+
+        ddata->videomode = lb035q02_timings;
+
+        dssdev = &ddata->dssdev;
+        dssdev->dev = &spi->dev;
+        dssdev->driver = &lb035q02_ops;
+        dssdev->type = OMAP_DISPLAY_TYPE_DPI;
+        dssdev->owner = THIS_MODULE;
+        dssdev->panel.timings = ddata->videomode;
+        dssdev->phy.dpi.data_lines = ddata->data_lines;
+
+        r = omapdss_register_display(dssdev);
+        if (r) {
+                dev_err(&spi->dev, "Failed to register panel\n");
+                goto err_reg;
+        }
+
+        return 0;
+
+err_reg:
+err_gpio:
+        omap_dss_put_device(ddata->in);
+        return r;
+}
+
+static int lb035q02_panel_spi_remove(struct spi_device *spi)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+        struct omap_dss_device *dssdev = &ddata->dssdev;
+        struct omap_dss_device *in = ddata->in;
+
+        omapdss_unregister_display(dssdev);
+
+        lb035q02_disable(dssdev);
+        lb035q02_disconnect(dssdev);
+
+        omap_dss_put_device(in);
+
+        return 0;
+}
+
+static struct spi_driver lb035q02_spi_driver = {
+        .probe          = lb035q02_panel_spi_probe,
+        .remove         = lb035q02_panel_spi_remove,
+        .driver         = {
+                .name   = "panel_lgphilips_lb035q02",
+                .owner  = THIS_MODULE,
+        },
+};
+
+module_spi_driver(lb035q02_spi_driver);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
+MODULE_LICENSE("GPL");
diff --git a/include/video/omap-panel-data.h b/include/video/omap-panel-data.h
index 678f5f70da1a..baf40450aae4 100644
--- a/include/video/omap-panel-data.h
+++ b/include/video/omap-panel-data.h
@@ -280,4 +280,22 @@ struct panel_acx565akm_platform_data {
         int datapairs;
 };
 
+/**
+ * panel_lb035q02 platform data
+ * @name: name for this display entity
+ * @source: name of the display entity used as a video source
+ * @data_lines: number of DPI datalines
+ * @backlight_gpio: gpio to enable/disable the backlight (or -1)
+ * @enable_gpio: gpio to enable/disable the panel (or -1)
+ */
+struct panel_lb035q02_platform_data {
+        const char *name;
+        const char *source;
+
+        int data_lines;
+
+        int backlight_gpio;
+        int enable_gpio;
+};
+
 #endif /* __OMAP_PANEL_DATA_H */