2 * LCD panel driver for LG.Philips LB035Q02
4 * Author: Steve Sakoman <steve@sakoman.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/spi/spi.h>
22 #include <linux/mutex.h>
24 #include <video/omapdss.h>
26 struct lb035q02_data {
30 static struct omap_video_timings lb035q02_timings = {
44 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
45 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
46 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
47 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
48 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
51 static int lb035q02_panel_power_on(struct omap_dss_device *dssdev)
55 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
58 r = omapdss_dpi_display_enable(dssdev);
62 if (dssdev->platform_enable) {
63 r = dssdev->platform_enable(dssdev);
70 omapdss_dpi_display_disable(dssdev);
75 static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
77 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
80 if (dssdev->platform_disable)
81 dssdev->platform_disable(dssdev);
83 omapdss_dpi_display_disable(dssdev);
86 static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
88 struct lb035q02_data *ld;
91 dssdev->panel.timings = lb035q02_timings;
93 ld = kzalloc(sizeof(*ld), GFP_KERNEL);
98 mutex_init(&ld->lock);
99 dev_set_drvdata(&dssdev->dev, ld);
105 static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
107 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
112 static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
114 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
117 mutex_lock(&ld->lock);
119 r = lb035q02_panel_power_on(dssdev);
122 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
124 mutex_unlock(&ld->lock);
127 mutex_unlock(&ld->lock);
131 static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
133 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
135 mutex_lock(&ld->lock);
137 lb035q02_panel_power_off(dssdev);
138 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
140 mutex_unlock(&ld->lock);
143 static int lb035q02_panel_suspend(struct omap_dss_device *dssdev)
145 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
147 mutex_lock(&ld->lock);
149 lb035q02_panel_power_off(dssdev);
150 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
152 mutex_unlock(&ld->lock);
156 static int lb035q02_panel_resume(struct omap_dss_device *dssdev)
158 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
161 mutex_lock(&ld->lock);
163 r = lb035q02_panel_power_on(dssdev);
166 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
168 mutex_unlock(&ld->lock);
171 mutex_unlock(&ld->lock);
175 static struct omap_dss_driver lb035q02_driver = {
176 .probe = lb035q02_panel_probe,
177 .remove = lb035q02_panel_remove,
179 .enable = lb035q02_panel_enable,
180 .disable = lb035q02_panel_disable,
181 .suspend = lb035q02_panel_suspend,
182 .resume = lb035q02_panel_resume,
185 .name = "lgphilips_lb035q02_panel",
186 .owner = THIS_MODULE,
190 static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
192 struct spi_message msg;
193 struct spi_transfer index_xfer = {
197 struct spi_transfer value_xfer = {
202 spi_message_init(&msg);
207 buffer[2] = reg & 0x7f;
208 index_xfer.tx_buf = buffer;
209 spi_message_add_tail(&index_xfer, &msg);
213 buffer[5] = val >> 8;
215 value_xfer.tx_buf = buffer + 4;
216 spi_message_add_tail(&value_xfer, &msg);
218 return spi_sync(spi, &msg);
221 static void init_lb035q02_panel(struct spi_device *spi)
223 /* Init sequence from page 28 of the lb035q02 spec */
224 lb035q02_write_reg(spi, 0x01, 0x6300);
225 lb035q02_write_reg(spi, 0x02, 0x0200);
226 lb035q02_write_reg(spi, 0x03, 0x0177);
227 lb035q02_write_reg(spi, 0x04, 0x04c7);
228 lb035q02_write_reg(spi, 0x05, 0xffc0);
229 lb035q02_write_reg(spi, 0x06, 0xe806);
230 lb035q02_write_reg(spi, 0x0a, 0x4008);
231 lb035q02_write_reg(spi, 0x0b, 0x0000);
232 lb035q02_write_reg(spi, 0x0d, 0x0030);
233 lb035q02_write_reg(spi, 0x0e, 0x2800);
234 lb035q02_write_reg(spi, 0x0f, 0x0000);
235 lb035q02_write_reg(spi, 0x16, 0x9f80);
236 lb035q02_write_reg(spi, 0x17, 0x0a0f);
237 lb035q02_write_reg(spi, 0x1e, 0x00c1);
238 lb035q02_write_reg(spi, 0x30, 0x0300);
239 lb035q02_write_reg(spi, 0x31, 0x0007);
240 lb035q02_write_reg(spi, 0x32, 0x0000);
241 lb035q02_write_reg(spi, 0x33, 0x0000);
242 lb035q02_write_reg(spi, 0x34, 0x0707);
243 lb035q02_write_reg(spi, 0x35, 0x0004);
244 lb035q02_write_reg(spi, 0x36, 0x0302);
245 lb035q02_write_reg(spi, 0x37, 0x0202);
246 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
247 lb035q02_write_reg(spi, 0x3b, 0x0806);
250 static int __devinit lb035q02_panel_spi_probe(struct spi_device *spi)
252 init_lb035q02_panel(spi);
253 return omap_dss_register_driver(&lb035q02_driver);
256 static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi)
258 omap_dss_unregister_driver(&lb035q02_driver);
262 static struct spi_driver lb035q02_spi_driver = {
264 .name = "lgphilips_lb035q02_panel-spi",
265 .owner = THIS_MODULE,
267 .probe = lb035q02_panel_spi_probe,
268 .remove = __devexit_p(lb035q02_panel_spi_remove),
271 module_spi_driver(lb035q02_spi_driver);
273 MODULE_LICENSE("GPL");