From: Erik Gilling <konkers@xxxxxxxxxxx>
NEC WVGA LCD NL8048HL11-01B panel support has been added.
This panel is being used in zoom2/zoom3/3630 sdp boards.
Signed-off-by: Mukund Mittal <mmittal@xxxxxx>
Signed-off-by: Rajkumar N <rajkumar.nagarajan@xxxxxx>
Signed-off-by: Samreen <samreen@xxxxxx>
CC: Subbu Venkatesh <subramani.venkatesh@xxxxxxxxxxxxx>
CC: Erik Gilling <konkers@xxxxxxxxxxx>
---
Version3:
- Optimized the init sequence by using struct array in the function
init_nec_8048_wvga_lcd()
- Changed the spi_send() to nec_8048_spi_send() to maintain consistency
- Added better decription in MODULE_DESCRIPTION()
Version2:
- the brightness updation is removed from the nec_8048_panel_enable()
to assure the user set brightness value is not over written
- error checking added where ever missing
- cosmetic changes are also included
This panel driver has orginated from panel-zoom2 from the L25.x
releases.Refer Commit:
http://git.omapzoom.org/?p=kernel/omap.git;a=commit;h=75fc121865125d9e3ca3b36f1f19f86b394e1f6b
drivers/video/omap2/displays/Kconfig | 7 +
drivers/video/omap2/displays/Makefile | 1 +
.../omap2/displays/panel-nec-nl8048hl11-01b.c | 325 ++++++++++++++++++++
3 files changed, 333 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig
index 12327bb..f8152cf 100644
--- a/drivers/video/omap2/displays/Kconfig
+++ b/drivers/video/omap2/displays/Kconfig
@@ -20,6 +20,13 @@ config PANEL_SHARP_LQ043T1DG01
help
LCD Panel used in TI's OMAP3517 EVM boards
+config PANEL_NEC_NL8048HL11_01B
+ tristate "NEC NL8048HL11-01B Panel"
+ depends on OMAP2_DSS
+ help
+ This NEC NL8048HL11-01B panel is TFT LCD
+ used in the Zoom2/3/3630 sdp boards.
+
config PANEL_TAAL
tristate "Taal DSI Panel"
depends on OMAP2_DSS_DSI
diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile
index aa38609..8ece91c 100644
--- a/drivers/video/omap2/displays/Makefile
+++ b/drivers/video/omap2/displays/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_PANEL_GENERIC) += panel-generic.o
obj-$(CONFIG_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o
obj-$(CONFIG_PANEL_SHARP_LQ043T1DG01) += panel-sharp-lq043t1dg01.o
+obj-$(CONFIG_PANEL_NEC_NL8048HL11_01B) += panel-nec-nl8048hl11-01b.o
obj-$(CONFIG_PANEL_TAAL) += panel-taal.o
obj-$(CONFIG_PANEL_TOPPOLY_TDO35S) += panel-toppoly-tdo35s.o
diff --git a/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
new file mode 100644
index 0000000..925e0fa
--- /dev/null
+++ b/drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c
@@ -0,0 +1,325 @@
+/*
+ * Support for NEC-nl8048hl11-01b panel driver
+ *
+ * Copyright (C) 2010 Texas Instruments Inc.
+ * Author: Erik Gilling <konkers@xxxxxxxxxxx>
+ * 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/backlight.h>
+#include <linux/fb.h>
+
+#include <plat/display.h>
+
+#define LCD_XRES 800
+#define LCD_YRES 480
+/*
+ * NEC PIX Clock Ratings
+ * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
+ */
+#define LCD_PIXEL_CLOCK 23800
+
+struct nec_8048_data {
+ struct backlight_device *bl;
+};
+
+static const struct {
+ unsigned char addr;
+ unsigned char dat;
+} nec_8048_init_seq[] = {
+ { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
+ { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
+ { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
+ { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
+ { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
+ { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
+ { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
+ { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
+ { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
+ { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
+ { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
+ { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
+ { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
+ { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
+ { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
+ { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
+ { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
+ { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
+};
+
+/*
+ * NEC NL8048HL11-01B Manual
+ * defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
+ */
+
+static struct omap_video_timings nec_8048_panel_timings = {
+ /* 800 x 480 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */
+ .x_res = LCD_XRES,
+ .y_res = LCD_YRES,
+ .pixel_clock = LCD_PIXEL_CLOCK,
+ .hfp = 6,
+ .hsw = 1,
+ .hbp = 4,
+ .vfp = 3,
+ .vsw = 1,
+ .vbp = 4,
+};
+
+static int nec_8048_bl_update_status(struct backlight_device *bl)
+{
+ struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
+ int level;
+
+ if (!dssdev->set_backlight)
+ return -EINVAL;
+
+ if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
+ bl->props.power == FB_BLANK_UNBLANK)
+ level = bl->props.brightness;
+ else
+ level = 0;
+
+ return dssdev->set_backlight(dssdev, level);
+}
+
+static int nec_8048_bl_get_brightness(struct backlight_device *bl)
+{
+ if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
+ bl->props.power == FB_BLANK_UNBLANK)
+ return bl->props.brightness;
+
+ return 0;
+}
+
+static const struct backlight_ops nec_8048_bl_ops = {
+ .get_brightness = nec_8048_bl_get_brightness,
+ .update_status = nec_8048_bl_update_status,
+};
+
+static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
+{
+ struct backlight_device *bl;
+ struct nec_8048_data *necd;
+ struct backlight_properties props;
+ int r;
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+ OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_RF |
+ OMAP_DSS_LCD_ONOFF;
+ dssdev->panel.timings = nec_8048_panel_timings;
+
+ necd = kzalloc(sizeof(*necd), GFP_KERNEL);
+ if (!necd)
+ return -ENOMEM;
+
+ dev_set_drvdata(&dssdev->dev, necd);
+
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 255;
+
+ bl = backlight_device_register("nec-8048", &dssdev->dev, dssdev,
+ &nec_8048_bl_ops, &props);
+ if (IS_ERR(bl)) {
+ r = PTR_ERR(bl);
+ kfree(necd);
+ return r;
+ }
+ necd->bl = bl;
+
+ bl->props.fb_blank = FB_BLANK_UNBLANK;
+ bl->props.power = FB_BLANK_UNBLANK;
+ bl->props.max_brightness = dssdev->max_backlight_level;
+ bl->props.brightness = dssdev->max_backlight_level;
+
+ r = nec_8048_bl_update_status(bl);
+ if (r < 0)
+ dev_err(&dssdev->dev, "failed to set lcd brightness\n");
+
+ return 0;
+}
+
+static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
+{
+ struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
+ struct backlight_device *bl = necd->bl;
+
+ bl->props.power = FB_BLANK_POWERDOWN;
+ nec_8048_bl_update_status(bl);
+ backlight_device_unregister(bl);
+
+ kfree(necd);
+}
+
+static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+ struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
+ struct backlight_device *bl = necd->bl;
+
+ if (dssdev->platform_enable) {
+ r = dssdev->platform_enable(dssdev);
+ if (r)
+ return r;
+ }
+
+ r = nec_8048_bl_update_status(bl);
+ if (r < 0)
+ dev_err(&dssdev->dev, "failed to set lcd brightness\n");
+
+ r = omapdss_dpi_display_enable(dssdev);
+
+ return r;
+}
+
+static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
+{
+ struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
+ struct backlight_device *bl = necd->bl;
+
+ omapdss_dpi_display_disable(dssdev);
+
+ bl->props.brightness = 0;
+ nec_8048_bl_update_status(bl);
+
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+}
+
+static int nec_8048_panel_suspend(struct omap_dss_device *dssdev)
+{
+ nec_8048_panel_disable(dssdev);
+ return 0;
+}
+
+static int nec_8048_panel_resume(struct omap_dss_device *dssdev)
+{
+ return nec_8048_panel_enable(dssdev);
+}
+
+static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
+{
+ return 16;
+}
+
+static struct omap_dss_driver nec_8048_driver = {
+ .probe = nec_8048_panel_probe,
+ .remove = nec_8048_panel_remove,
+ .enable = nec_8048_panel_enable,
+ .disable = nec_8048_panel_disable,
+ .suspend = nec_8048_panel_suspend,
+ .resume = nec_8048_panel_resume,
+ .get_recommended_bpp = nec_8048_recommended_bpp,
+
+ .driver = {
+ .name = "NEC_8048_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
+ unsigned char reg_data)
+{
+ int ret = 0;
+ unsigned int cmd = 0, data = 0;
+
+ cmd = 0x0000 | reg_addr; /* register address write */
+ data = 0x0100 | reg_data ; /* register data write */
+ data = (cmd << 16) | data;
+
+ ret = spi_write(spi, (unsigned char *)&data, 4);
+ if (ret)
+ pr_err("error in spi_write %x\n", data);
+
+ return ret;
+}
+
+static int init_nec_8048_wvga_lcd(struct spi_device *spi)
+{
+ unsigned int i;
+ /* Initialization Sequence */
+ /* nec_8048_spi_send(spi, REG, VAL) */
+ for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
+ nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
+ nec_8048_init_seq[i].dat);
+ udelay(20);
+ nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
+ nec_8048_init_seq[i].dat);
+ return 0;
+}
+
+static int nec_8048_spi_probe(struct spi_device *spi)
+{
+ spi->mode = SPI_MODE_0;
+ spi->bits_per_word = 32;
+ spi_setup(spi);
+
+ init_nec_8048_wvga_lcd(spi);
+
+ return omap_dss_register_driver(&nec_8048_driver);
+}
+
+static int nec_8048_spi_remove(struct spi_device *spi)
+{
+ omap_dss_unregister_driver(&nec_8048_driver);
+
+ return 0;
+}
+
+static int nec_8048_spi_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+ nec_8048_spi_send(spi, 2, 0x01);
+ mdelay(40);
+
+ return 0;
+}
+
+static int nec_8048_spi_resume(struct spi_device *spi)
+{
+ /* reinitialize the panel */
+ spi_setup(spi);
+ nec_8048_spi_send(spi, 2, 0x00);
+ init_nec_8048_wvga_lcd(spi);
+
+ return 0;
+}
+
+static struct spi_driver nec_8048_spi_driver = {
+ .probe = nec_8048_spi_probe,
+ .remove = __devexit_p(nec_8048_spi_remove),
+ .suspend = nec_8048_spi_suspend,
+ .resume = nec_8048_spi_resume,
+ .driver = {
+ .name = "nec_8048_spi",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init nec_8048_lcd_init(void)
+{
+ return spi_register_driver(&nec_8048_spi_driver);
+}
+
+static void __exit nec_8048_lcd_exit(void)
+{
+ return spi_unregister_driver(&nec_8048_spi_driver);
+}
+
+module_init(nec_8048_lcd_init);
+module_exit(nec_8048_lcd_exit);
+MODULE_AUTHOR("Erik Gilling <konkers@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
+MODULE_LICENSE("GPL");
--
1.5.6.3
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