/* * NEC NL8048HL11 Panel driver * * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ * Author: Erik Gilling * Converted to new DSS device model: Tomi Valkeinen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include "../dss/omapdss.h" struct panel_drv_data { struct omap_dss_device dssdev; struct videomode vm; struct gpio_desc *res_gpio; struct spi_device *spi; }; #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 23800000 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 }, }; static const struct videomode nec_8048_panel_vm = { .hactive = LCD_XRES, .vactive = LCD_YRES, .pixelclock = LCD_PIXEL_CLOCK, .hfront_porch = 6, .hsync_len = 1, .hback_porch = 4, .vfront_porch = 3, .vsync_len = 1, .vback_porch = 4, .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW, }; #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) 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_connect(struct omap_dss_device *src, struct omap_dss_device *dst) { return 0; } static void nec_8048_disconnect(struct omap_dss_device *src, struct omap_dss_device *dst) { } static void nec_8048_enable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); gpiod_set_value_cansleep(ddata->res_gpio, 1); } static void nec_8048_disable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); gpiod_set_value_cansleep(ddata->res_gpio, 0); } static int nec_8048_get_modes(struct omap_dss_device *dssdev, struct drm_connector *connector) { struct panel_drv_data *ddata = to_panel_data(dssdev); return omapdss_display_get_modes(connector, &ddata->vm); } static const struct omap_dss_device_ops nec_8048_ops = { .connect = nec_8048_connect, .disconnect = nec_8048_disconnect, .enable = nec_8048_enable, .disable = nec_8048_disable, .get_modes = nec_8048_get_modes, }; static int nec_8048_probe(struct spi_device *spi) { struct panel_drv_data *ddata; struct omap_dss_device *dssdev; struct gpio_desc *gpio; int r; dev_dbg(&spi->dev, "%s\n", __func__); spi->mode = SPI_MODE_0; spi->bits_per_word = 32; r = spi_setup(spi); if (r < 0) { dev_err(&spi->dev, "spi_setup failed: %d\n", r); return r; } init_nec_8048_wvga_lcd(spi); ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); if (ddata == NULL) return -ENOMEM; dev_set_drvdata(&spi->dev, ddata); ddata->spi = spi; gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(gpio)) { dev_err(&spi->dev, "failed to get reset gpio\n"); return PTR_ERR(gpio); } ddata->res_gpio = gpio; ddata->vm = nec_8048_panel_vm; dssdev = &ddata->dssdev; dssdev->dev = &spi->dev; dssdev->ops = &nec_8048_ops; dssdev->type = OMAP_DISPLAY_TYPE_DPI; dssdev->display = true; dssdev->owner = THIS_MODULE; dssdev->of_ports = BIT(0); dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES; dssdev->bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE; omapdss_display_init(dssdev); omapdss_device_register(dssdev); return 0; } static int nec_8048_remove(struct spi_device *spi) { struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); struct omap_dss_device *dssdev = &ddata->dssdev; dev_dbg(&ddata->spi->dev, "%s\n", __func__); omapdss_device_unregister(dssdev); nec_8048_disable(dssdev); return 0; } #ifdef CONFIG_PM_SLEEP static int nec_8048_suspend(struct device *dev) { struct spi_device *spi = to_spi_device(dev); nec_8048_spi_send(spi, 2, 0x01); mdelay(40); return 0; } static int nec_8048_resume(struct device *dev) { struct spi_device *spi = to_spi_device(dev); /* reinitialize the panel */ spi_setup(spi); nec_8048_spi_send(spi, 2, 0x00); init_nec_8048_wvga_lcd(spi); return 0; } static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend, nec_8048_resume); #define NEC_8048_PM_OPS (&nec_8048_pm_ops) #else #define NEC_8048_PM_OPS NULL #endif static const struct of_device_id nec_8048_of_match[] = { { .compatible = "omapdss,nec,nl8048hl11", }, {}, }; MODULE_DEVICE_TABLE(of, nec_8048_of_match); static struct spi_driver nec_8048_driver = { .driver = { .name = "panel-nec-nl8048hl11", .pm = NEC_8048_PM_OPS, .of_match_table = nec_8048_of_match, .suppress_bind_attrs = true, }, .probe = nec_8048_probe, .remove = nec_8048_remove, }; module_spi_driver(nec_8048_driver); MODULE_ALIAS("spi:nec,nl8048hl11"); MODULE_AUTHOR("Erik Gilling "); MODULE_DESCRIPTION("NEC-NL8048HL11 Driver"); MODULE_LICENSE("GPL");