/* * LCD panel driver for LG.Philips LB035Q02 * * Author: Steve Sakoman * * 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 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");