/* * Support for NEC-nl8048hl11-01b panel driver * * Copyright (C) 2010 Texas Instruments Inc. * Author: Erik Gilling * 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 . */ #include #include #include #include #include #include #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 "); MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver"); MODULE_LICENSE("GPL");