358 lines
8.6 KiB
C
358 lines
8.6 KiB
C
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/*
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* Support for NEC-nl8048hl11-01b panel driver
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*
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* Copyright (C) 2010 Texas Instruments Inc.
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* Author: Erik Gilling <konkers@android.com>
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/spi/spi.h>
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#include <linux/backlight.h>
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#include <linux/fb.h>
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#include <video/omapdss.h>
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#define LCD_XRES 800
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#define LCD_YRES 480
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/*
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* NEC PIX Clock Ratings
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* MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
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*/
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#define LCD_PIXEL_CLOCK 23800
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struct nec_8048_data {
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struct backlight_device *bl;
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};
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static const struct {
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unsigned char addr;
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unsigned char dat;
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} nec_8048_init_seq[] = {
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{ 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
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{ 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
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{ 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
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{ 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
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{ 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
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{ 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
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{ 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
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{ 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
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{ 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
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{ 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
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{ 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
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{ 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
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{ 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
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{ 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
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{ 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
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{ 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
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{ 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
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{ 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
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};
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/*
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* NEC NL8048HL11-01B Manual
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* defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
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*/
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static struct omap_video_timings nec_8048_panel_timings = {
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/* 800 x 480 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */
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.x_res = LCD_XRES,
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.y_res = LCD_YRES,
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.pixel_clock = LCD_PIXEL_CLOCK,
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.hfp = 6,
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.hsw = 1,
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.hbp = 4,
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.vfp = 3,
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.vsw = 1,
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.vbp = 4,
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};
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static int nec_8048_bl_update_status(struct backlight_device *bl)
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{
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struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
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int level;
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if (!dssdev->set_backlight)
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return -EINVAL;
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if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
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bl->props.power == FB_BLANK_UNBLANK)
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level = bl->props.brightness;
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else
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level = 0;
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return dssdev->set_backlight(dssdev, level);
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}
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static int nec_8048_bl_get_brightness(struct backlight_device *bl)
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{
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if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
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bl->props.power == FB_BLANK_UNBLANK)
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return bl->props.brightness;
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return 0;
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}
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static const struct backlight_ops nec_8048_bl_ops = {
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.get_brightness = nec_8048_bl_get_brightness,
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.update_status = nec_8048_bl_update_status,
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};
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static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
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{
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struct backlight_device *bl;
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struct nec_8048_data *necd;
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struct backlight_properties props;
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int r;
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dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
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OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_RF |
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OMAP_DSS_LCD_ONOFF;
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dssdev->panel.timings = nec_8048_panel_timings;
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necd = kzalloc(sizeof(*necd), GFP_KERNEL);
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if (!necd)
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return -ENOMEM;
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dev_set_drvdata(&dssdev->dev, necd);
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memset(&props, 0, sizeof(struct backlight_properties));
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props.max_brightness = 255;
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bl = backlight_device_register("nec-8048", &dssdev->dev, dssdev,
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&nec_8048_bl_ops, &props);
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if (IS_ERR(bl)) {
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r = PTR_ERR(bl);
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kfree(necd);
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return r;
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}
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necd->bl = bl;
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bl->props.fb_blank = FB_BLANK_UNBLANK;
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bl->props.power = FB_BLANK_UNBLANK;
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bl->props.max_brightness = dssdev->max_backlight_level;
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bl->props.brightness = dssdev->max_backlight_level;
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r = nec_8048_bl_update_status(bl);
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if (r < 0)
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dev_err(&dssdev->dev, "failed to set lcd brightness\n");
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return 0;
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}
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static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
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{
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struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
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struct backlight_device *bl = necd->bl;
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bl->props.power = FB_BLANK_POWERDOWN;
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nec_8048_bl_update_status(bl);
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backlight_device_unregister(bl);
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kfree(necd);
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}
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static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
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{
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int r;
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struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
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struct backlight_device *bl = necd->bl;
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if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
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return 0;
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r = omapdss_dpi_display_enable(dssdev);
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if (r)
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goto err0;
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if (dssdev->platform_enable) {
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r = dssdev->platform_enable(dssdev);
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if (r)
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goto err1;
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}
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r = nec_8048_bl_update_status(bl);
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if (r < 0)
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dev_err(&dssdev->dev, "failed to set lcd brightness\n");
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return 0;
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err1:
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omapdss_dpi_display_disable(dssdev);
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err0:
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return r;
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}
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static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
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{
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struct nec_8048_data *necd = dev_get_drvdata(&dssdev->dev);
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struct backlight_device *bl = necd->bl;
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if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
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return;
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bl->props.brightness = 0;
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nec_8048_bl_update_status(bl);
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if (dssdev->platform_disable)
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dssdev->platform_disable(dssdev);
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omapdss_dpi_display_disable(dssdev);
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}
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static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
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{
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int r;
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r = nec_8048_panel_power_on(dssdev);
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if (r)
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return r;
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return 0;
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}
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static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
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{
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nec_8048_panel_power_off(dssdev);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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}
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static int nec_8048_panel_suspend(struct omap_dss_device *dssdev)
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{
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nec_8048_panel_power_off(dssdev);
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dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
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return 0;
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}
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static int nec_8048_panel_resume(struct omap_dss_device *dssdev)
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{
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int r;
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r = nec_8048_panel_power_on(dssdev);
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if (r)
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return r;
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return 0;
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}
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static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
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{
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return 16;
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}
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static struct omap_dss_driver nec_8048_driver = {
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.probe = nec_8048_panel_probe,
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.remove = nec_8048_panel_remove,
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.enable = nec_8048_panel_enable,
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.disable = nec_8048_panel_disable,
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.suspend = nec_8048_panel_suspend,
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.resume = nec_8048_panel_resume,
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.get_recommended_bpp = nec_8048_recommended_bpp,
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.driver = {
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.name = "NEC_8048_panel",
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.owner = THIS_MODULE,
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},
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};
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static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
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unsigned char reg_data)
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{
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int ret = 0;
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unsigned int cmd = 0, data = 0;
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cmd = 0x0000 | reg_addr; /* register address write */
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data = 0x0100 | reg_data ; /* register data write */
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data = (cmd << 16) | data;
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ret = spi_write(spi, (unsigned char *)&data, 4);
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if (ret)
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pr_err("error in spi_write %x\n", data);
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return ret;
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}
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static int init_nec_8048_wvga_lcd(struct spi_device *spi)
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{
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unsigned int i;
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/* Initialization Sequence */
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/* nec_8048_spi_send(spi, REG, VAL) */
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for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
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nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
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nec_8048_init_seq[i].dat);
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udelay(20);
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nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
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nec_8048_init_seq[i].dat);
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return 0;
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}
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static int nec_8048_spi_probe(struct spi_device *spi)
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{
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spi->mode = SPI_MODE_0;
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spi->bits_per_word = 32;
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spi_setup(spi);
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init_nec_8048_wvga_lcd(spi);
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return omap_dss_register_driver(&nec_8048_driver);
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}
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static int nec_8048_spi_remove(struct spi_device *spi)
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{
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omap_dss_unregister_driver(&nec_8048_driver);
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return 0;
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}
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static int nec_8048_spi_suspend(struct spi_device *spi, pm_message_t mesg)
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{
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nec_8048_spi_send(spi, 2, 0x01);
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mdelay(40);
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return 0;
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}
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static int nec_8048_spi_resume(struct spi_device *spi)
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{
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/* reinitialize the panel */
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spi_setup(spi);
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nec_8048_spi_send(spi, 2, 0x00);
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init_nec_8048_wvga_lcd(spi);
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return 0;
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}
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static struct spi_driver nec_8048_spi_driver = {
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.probe = nec_8048_spi_probe,
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.remove = __devexit_p(nec_8048_spi_remove),
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.suspend = nec_8048_spi_suspend,
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.resume = nec_8048_spi_resume,
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.driver = {
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.name = "nec_8048_spi",
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.owner = THIS_MODULE,
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},
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};
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module_spi_driver(nec_8048_spi_driver);
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MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
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MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
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||
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|
MODULE_LICENSE("GPL");
|