2011-03-05 21:58:38 +08:00
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/*
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* LCD panel driver for LG.Philips LB035Q02
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*
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* Author: Steve Sakoman <steve@sakoman.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/spi/spi.h>
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#include <linux/mutex.h>
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2011-05-11 19:05:07 +08:00
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#include <video/omapdss.h>
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2011-03-05 21:58:38 +08:00
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struct lb035q02_data {
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struct mutex lock;
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};
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static struct omap_video_timings lb035q02_timings = {
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.x_res = 320,
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.y_res = 240,
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.pixel_clock = 6500,
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.hsw = 2,
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.hfp = 20,
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.hbp = 68,
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.vsw = 2,
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.vfp = 4,
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.vbp = 18,
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2012-06-25 14:56:38 +08:00
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.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
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.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
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.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
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.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
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.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
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2011-03-05 21:58:38 +08:00
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};
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static int lb035q02_panel_power_on(struct omap_dss_device *dssdev)
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{
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int r;
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if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
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return 0;
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2012-08-08 16:58:54 +08:00
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omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
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2012-07-06 18:00:52 +08:00
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omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
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2012-08-08 16:58:54 +08:00
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2011-03-05 21:58:38 +08:00
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r = omapdss_dpi_display_enable(dssdev);
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if (r)
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goto err0;
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if (dssdev->platform_enable) {
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r = dssdev->platform_enable(dssdev);
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if (r)
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goto err1;
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}
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return 0;
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err1:
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omapdss_dpi_display_disable(dssdev);
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err0:
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return r;
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}
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static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
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{
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if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
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return;
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if (dssdev->platform_disable)
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dssdev->platform_disable(dssdev);
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omapdss_dpi_display_disable(dssdev);
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}
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static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
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{
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struct lb035q02_data *ld;
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int r;
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dssdev->panel.timings = lb035q02_timings;
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ld = kzalloc(sizeof(*ld), GFP_KERNEL);
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if (!ld) {
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r = -ENOMEM;
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goto err;
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}
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mutex_init(&ld->lock);
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dev_set_drvdata(&dssdev->dev, ld);
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return 0;
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err:
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return r;
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}
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static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
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{
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struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
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kfree(ld);
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}
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static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
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{
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struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
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int r;
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mutex_lock(&ld->lock);
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r = lb035q02_panel_power_on(dssdev);
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if (r)
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goto err;
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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mutex_unlock(&ld->lock);
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return 0;
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err:
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mutex_unlock(&ld->lock);
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return r;
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}
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static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
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{
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struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
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mutex_lock(&ld->lock);
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lb035q02_panel_power_off(dssdev);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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mutex_unlock(&ld->lock);
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}
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static int lb035q02_panel_suspend(struct omap_dss_device *dssdev)
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{
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struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
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mutex_lock(&ld->lock);
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lb035q02_panel_power_off(dssdev);
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dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
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mutex_unlock(&ld->lock);
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return 0;
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}
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static int lb035q02_panel_resume(struct omap_dss_device *dssdev)
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{
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struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev);
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int r;
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mutex_lock(&ld->lock);
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r = lb035q02_panel_power_on(dssdev);
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if (r)
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goto err;
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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mutex_unlock(&ld->lock);
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return 0;
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err:
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mutex_unlock(&ld->lock);
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return r;
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}
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static struct omap_dss_driver lb035q02_driver = {
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.probe = lb035q02_panel_probe,
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.remove = lb035q02_panel_remove,
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.enable = lb035q02_panel_enable,
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.disable = lb035q02_panel_disable,
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.suspend = lb035q02_panel_suspend,
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.resume = lb035q02_panel_resume,
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.driver = {
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.name = "lgphilips_lb035q02_panel",
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.owner = THIS_MODULE,
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},
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};
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static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
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{
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struct spi_message msg;
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struct spi_transfer index_xfer = {
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.len = 3,
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.cs_change = 1,
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};
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struct spi_transfer value_xfer = {
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.len = 3,
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};
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u8 buffer[16];
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spi_message_init(&msg);
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/* register index */
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buffer[0] = 0x70;
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buffer[1] = 0x00;
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buffer[2] = reg & 0x7f;
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index_xfer.tx_buf = buffer;
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spi_message_add_tail(&index_xfer, &msg);
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/* register value */
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buffer[4] = 0x72;
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buffer[5] = val >> 8;
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buffer[6] = val;
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value_xfer.tx_buf = buffer + 4;
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spi_message_add_tail(&value_xfer, &msg);
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return spi_sync(spi, &msg);
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}
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static void init_lb035q02_panel(struct spi_device *spi)
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{
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/* Init sequence from page 28 of the lb035q02 spec */
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lb035q02_write_reg(spi, 0x01, 0x6300);
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lb035q02_write_reg(spi, 0x02, 0x0200);
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lb035q02_write_reg(spi, 0x03, 0x0177);
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lb035q02_write_reg(spi, 0x04, 0x04c7);
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lb035q02_write_reg(spi, 0x05, 0xffc0);
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lb035q02_write_reg(spi, 0x06, 0xe806);
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lb035q02_write_reg(spi, 0x0a, 0x4008);
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lb035q02_write_reg(spi, 0x0b, 0x0000);
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lb035q02_write_reg(spi, 0x0d, 0x0030);
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lb035q02_write_reg(spi, 0x0e, 0x2800);
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lb035q02_write_reg(spi, 0x0f, 0x0000);
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lb035q02_write_reg(spi, 0x16, 0x9f80);
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lb035q02_write_reg(spi, 0x17, 0x0a0f);
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lb035q02_write_reg(spi, 0x1e, 0x00c1);
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lb035q02_write_reg(spi, 0x30, 0x0300);
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lb035q02_write_reg(spi, 0x31, 0x0007);
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lb035q02_write_reg(spi, 0x32, 0x0000);
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lb035q02_write_reg(spi, 0x33, 0x0000);
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lb035q02_write_reg(spi, 0x34, 0x0707);
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lb035q02_write_reg(spi, 0x35, 0x0004);
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lb035q02_write_reg(spi, 0x36, 0x0302);
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lb035q02_write_reg(spi, 0x37, 0x0202);
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lb035q02_write_reg(spi, 0x3a, 0x0a0d);
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lb035q02_write_reg(spi, 0x3b, 0x0806);
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}
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static int __devinit lb035q02_panel_spi_probe(struct spi_device *spi)
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{
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init_lb035q02_panel(spi);
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return omap_dss_register_driver(&lb035q02_driver);
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}
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static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi)
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{
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omap_dss_unregister_driver(&lb035q02_driver);
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return 0;
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}
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static struct spi_driver lb035q02_spi_driver = {
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.driver = {
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.name = "lgphilips_lb035q02_panel-spi",
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.owner = THIS_MODULE,
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},
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.probe = lb035q02_panel_spi_probe,
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.remove = __devexit_p(lb035q02_panel_spi_remove),
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};
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2012-01-27 16:02:54 +08:00
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module_spi_driver(lb035q02_spi_driver);
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2011-03-05 21:58:38 +08:00
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MODULE_LICENSE("GPL");
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