--- /dev/null
+/*
+ * LCD panel driver for LG.Philips LB035Q02
+ *
+ * Author: 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.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/mutex.h>
+
+#include <plat/display.h>
+
+struct lb035q02_data {
+ struct mutex lock;
+};
+
+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,
+};
+
+static int lb035q02_panel_power_on(struct omap_dss_device *dssdev)
+{
+ int r;
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+ return 0;
+
+ r = omapdss_dpi_display_enable(dssdev);
+ if (r)
+ goto err0;
+
+ if (dssdev->platform_enable) {
+ r = dssdev->platform_enable(dssdev);
+ if (r)
+ goto err1;
+ }
+
+ return 0;
+err1:
+ omapdss_dpi_display_disable(dssdev);
+err0:
+ return r;
+}
+
+static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
+{
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ return;
+
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+
+ omapdss_dpi_display_disable(dssdev);
+}
+
+static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
+{
+ struct lb035q02_data *ld;
+ int r;
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+ OMAP_DSS_LCD_IHS;
+ dssdev->panel.timings = lb035q02_timings;
+
+ ld = kzalloc(sizeof(*ld), GFP_KERNEL);
+ if (!ld) {
+ r = -ENOMEM;
+ goto err;
+ }
+ mutex_init(&ld->lock);
+ dev_set_drvdata(&dssdev->dev, ld);
+ return 0;
+err:
+ return r;
+}
+
+static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
+{
+ struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+
+ kfree(ld);
+}
+
+static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
+{
+ struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+ int r;
+
+ mutex_lock(&ld->lock);
+
+ r = lb035q02_panel_power_on(dssdev);
+ if (r)
+ goto err;
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ mutex_unlock(&ld->lock);
+ return 0;
+err:
+ mutex_unlock(&ld->lock);
+ return r;
+}
+
+static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
+{
+ struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+
+ mutex_lock(&ld->lock);
+
+ lb035q02_panel_power_off(dssdev);
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+
+ mutex_unlock(&ld->lock);
+}
+
+static int lb035q02_panel_suspend(struct omap_dss_device *dssdev)
+{
+ struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+
+ mutex_lock(&ld->lock);
+
+ lb035q02_panel_power_off(dssdev);
+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
+ mutex_unlock(&ld->lock);
+ return 0;
+}
+
+static int lb035q02_panel_resume(struct omap_dss_device *dssdev)
+{
+ struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
+ int r;
+
+ mutex_lock(&ld->lock);
+
+ r = lb035q02_panel_power_on(dssdev);
+ if (r)
+ goto err;
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ mutex_unlock(&ld->lock);
+ return 0;
+err:
+ mutex_unlock(&ld->lock);
+ return r;
+}
+
+static struct omap_dss_driver lb035q02_driver = {
+ .probe = lb035q02_panel_probe,
+ .remove = lb035q02_panel_remove,
+
+ .enable = lb035q02_panel_enable,
+ .disable = lb035q02_panel_disable,
+ .suspend = lb035q02_panel_suspend,
+ .resume = lb035q02_panel_resume,
+
+ .driver = {
+ .name = "lgphilips_lb035q02_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+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 __devinit lb035q02_panel_spi_probe(struct spi_device *spi)
+{
+ init_lb035q02_panel(spi);
+ return omap_dss_register_driver(&lb035q02_driver);
+}
+
+static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi)
+{
+ omap_dss_unregister_driver(&lb035q02_driver);
+ return 0;
+}
+
+static struct spi_driver lb035q02_spi_driver = {
+ .driver = {
+ .name = "lgphilips_lb035q02_panel-spi",
+ .owner = THIS_MODULE,
+ },
+ .probe = lb035q02_panel_spi_probe,
+ .remove = __devexit_p(lb035q02_panel_spi_remove),
+};
+
+static int __init lb035q02_panel_drv_init(void)
+{
+ return spi_register_driver(&lb035q02_spi_driver);
+}
+
+static void __exit lb035q02_panel_drv_exit(void)
+{
+ spi_unregister_driver(&lb035q02_spi_driver);
+}
+
+module_init(lb035q02_panel_drv_init);
+module_exit(lb035q02_panel_drv_exit);
+MODULE_LICENSE("GPL");
projects / mv-sheeva.git / commitdiff