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 omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
59 omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
61 r = omapdss_dpi_display_enable(dssdev);
65 if (dssdev->platform_enable) {
66 r = dssdev->platform_enable(dssdev);
73 omapdss_dpi_display_disable(dssdev);
78 static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
80 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
83 if (dssdev->platform_disable)
84 dssdev->platform_disable(dssdev);
86 omapdss_dpi_display_disable(dssdev);
89 static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
91 struct lb035q02_data *ld;
94 dssdev->panel.timings = lb035q02_timings;
96 ld = kzalloc(sizeof(*ld), GFP_KERNEL);
101 mutex_init(&ld->lock);
102 dev_set_drvdata(&dssdev->dev, ld);
108 static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
110 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
115 static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
117 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
120 mutex_lock(&ld->lock);
122 r = lb035q02_panel_power_on(dssdev);
125 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
127 mutex_unlock(&ld->lock);
130 mutex_unlock(&ld->lock);
134 static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
136 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
138 mutex_lock(&ld->lock);
140 lb035q02_panel_power_off(dssdev);
141 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
143 mutex_unlock(&ld->lock);
146 static struct omap_dss_driver lb035q02_driver = {
147 .probe = lb035q02_panel_probe,
148 .remove = lb035q02_panel_remove,
150 .enable = lb035q02_panel_enable,
151 .disable = lb035q02_panel_disable,
154 .name = "lgphilips_lb035q02_panel",
155 .owner = THIS_MODULE,
159 static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
161 struct spi_message msg;
162 struct spi_transfer index_xfer = {
166 struct spi_transfer value_xfer = {
171 spi_message_init(&msg);
176 buffer[2] = reg & 0x7f;
177 index_xfer.tx_buf = buffer;
178 spi_message_add_tail(&index_xfer, &msg);
182 buffer[5] = val >> 8;
184 value_xfer.tx_buf = buffer + 4;
185 spi_message_add_tail(&value_xfer, &msg);
187 return spi_sync(spi, &msg);
190 static void init_lb035q02_panel(struct spi_device *spi)
192 /* Init sequence from page 28 of the lb035q02 spec */
193 lb035q02_write_reg(spi, 0x01, 0x6300);
194 lb035q02_write_reg(spi, 0x02, 0x0200);
195 lb035q02_write_reg(spi, 0x03, 0x0177);
196 lb035q02_write_reg(spi, 0x04, 0x04c7);
197 lb035q02_write_reg(spi, 0x05, 0xffc0);
198 lb035q02_write_reg(spi, 0x06, 0xe806);
199 lb035q02_write_reg(spi, 0x0a, 0x4008);
200 lb035q02_write_reg(spi, 0x0b, 0x0000);
201 lb035q02_write_reg(spi, 0x0d, 0x0030);
202 lb035q02_write_reg(spi, 0x0e, 0x2800);
203 lb035q02_write_reg(spi, 0x0f, 0x0000);
204 lb035q02_write_reg(spi, 0x16, 0x9f80);
205 lb035q02_write_reg(spi, 0x17, 0x0a0f);
206 lb035q02_write_reg(spi, 0x1e, 0x00c1);
207 lb035q02_write_reg(spi, 0x30, 0x0300);
208 lb035q02_write_reg(spi, 0x31, 0x0007);
209 lb035q02_write_reg(spi, 0x32, 0x0000);
210 lb035q02_write_reg(spi, 0x33, 0x0000);
211 lb035q02_write_reg(spi, 0x34, 0x0707);
212 lb035q02_write_reg(spi, 0x35, 0x0004);
213 lb035q02_write_reg(spi, 0x36, 0x0302);
214 lb035q02_write_reg(spi, 0x37, 0x0202);
215 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
216 lb035q02_write_reg(spi, 0x3b, 0x0806);
219 static int __devinit lb035q02_panel_spi_probe(struct spi_device *spi)
221 init_lb035q02_panel(spi);
222 return omap_dss_register_driver(&lb035q02_driver);
225 static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi)
227 omap_dss_unregister_driver(&lb035q02_driver);
231 static struct spi_driver lb035q02_spi_driver = {
233 .name = "lgphilips_lb035q02_panel-spi",
234 .owner = THIS_MODULE,
236 .probe = lb035q02_panel_spi_probe,
237 .remove = __devexit_p(lb035q02_panel_spi_remove),
240 module_spi_driver(lb035q02_spi_driver);
242 MODULE_LICENSE("GPL");