forked from Minki/linux
4e040ec70b
We no longer have any boards that require the platform data support from the panel, so we can remove the related code. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
362 lines
8.3 KiB
C
362 lines
8.3 KiB
C
/*
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* LG.Philips LB035Q02 LCD Panel driver
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*
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* Copyright (C) 2013 Texas Instruments
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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* Based on a driver by: 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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#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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#include <linux/gpio.h>
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#include <video/omapdss.h>
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#include <video/omap-panel-data.h>
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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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.pixelclock = 6500000,
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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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.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_FALLING_EDGE,
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};
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struct panel_drv_data {
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struct omap_dss_device dssdev;
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struct omap_dss_device *in;
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struct spi_device *spi;
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int data_lines;
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struct omap_video_timings videomode;
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/* used for non-DT boot, to be removed */
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int backlight_gpio;
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struct gpio_desc *enable_gpio;
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};
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#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
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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 lb035q02_connect(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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if (omapdss_device_is_connected(dssdev))
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return 0;
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r = in->ops.dpi->connect(in, dssdev);
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if (r)
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return r;
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init_lb035q02_panel(ddata->spi);
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return 0;
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}
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static void lb035q02_disconnect(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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if (!omapdss_device_is_connected(dssdev))
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return;
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in->ops.dpi->disconnect(in, dssdev);
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}
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static int lb035q02_enable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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if (!omapdss_device_is_connected(dssdev))
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return -ENODEV;
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if (omapdss_device_is_enabled(dssdev))
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return 0;
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if (ddata->data_lines)
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in->ops.dpi->set_data_lines(in, ddata->data_lines);
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in->ops.dpi->set_timings(in, &ddata->videomode);
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r = in->ops.dpi->enable(in);
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if (r)
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return r;
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if (ddata->enable_gpio)
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gpiod_set_value_cansleep(ddata->enable_gpio, 1);
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if (gpio_is_valid(ddata->backlight_gpio))
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gpio_set_value_cansleep(ddata->backlight_gpio, 1);
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return 0;
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}
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static void lb035q02_disable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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if (!omapdss_device_is_enabled(dssdev))
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return;
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if (ddata->enable_gpio)
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gpiod_set_value_cansleep(ddata->enable_gpio, 0);
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if (gpio_is_valid(ddata->backlight_gpio))
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gpio_set_value_cansleep(ddata->backlight_gpio, 0);
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in->ops.dpi->disable(in);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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}
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static void lb035q02_set_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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ddata->videomode = *timings;
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dssdev->panel.timings = *timings;
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in->ops.dpi->set_timings(in, timings);
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}
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static void lb035q02_get_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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*timings = ddata->videomode;
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}
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static int lb035q02_check_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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return in->ops.dpi->check_timings(in, timings);
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}
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static struct omap_dss_driver lb035q02_ops = {
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.connect = lb035q02_connect,
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.disconnect = lb035q02_disconnect,
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.enable = lb035q02_enable,
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.disable = lb035q02_disable,
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.set_timings = lb035q02_set_timings,
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.get_timings = lb035q02_get_timings,
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.check_timings = lb035q02_check_timings,
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.get_resolution = omapdss_default_get_resolution,
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};
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static int lb035q02_probe_of(struct spi_device *spi)
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{
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struct device_node *node = spi->dev.of_node;
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struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
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struct omap_dss_device *in;
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struct gpio_desc *gpio;
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gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
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if (IS_ERR(gpio)) {
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dev_err(&spi->dev, "failed to parse enable gpio\n");
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return PTR_ERR(gpio);
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}
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ddata->enable_gpio = gpio;
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ddata->backlight_gpio = -ENOENT;
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in = omapdss_of_find_source_for_first_ep(node);
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if (IS_ERR(in)) {
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dev_err(&spi->dev, "failed to find video source\n");
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return PTR_ERR(in);
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}
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ddata->in = in;
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return 0;
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}
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static int lb035q02_panel_spi_probe(struct spi_device *spi)
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{
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struct panel_drv_data *ddata;
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struct omap_dss_device *dssdev;
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int r;
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ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
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if (ddata == NULL)
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return -ENOMEM;
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dev_set_drvdata(&spi->dev, ddata);
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ddata->spi = spi;
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if (!spi->dev.of_node)
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return -ENODEV;
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r = lb035q02_probe_of(spi);
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if (r)
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return r;
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if (gpio_is_valid(ddata->backlight_gpio)) {
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r = devm_gpio_request_one(&spi->dev, ddata->backlight_gpio,
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GPIOF_OUT_INIT_LOW, "panel backlight");
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if (r)
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goto err_gpio;
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}
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ddata->videomode = lb035q02_timings;
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dssdev = &ddata->dssdev;
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dssdev->dev = &spi->dev;
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dssdev->driver = &lb035q02_ops;
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dssdev->type = OMAP_DISPLAY_TYPE_DPI;
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dssdev->owner = THIS_MODULE;
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dssdev->panel.timings = ddata->videomode;
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dssdev->phy.dpi.data_lines = ddata->data_lines;
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r = omapdss_register_display(dssdev);
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if (r) {
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dev_err(&spi->dev, "Failed to register panel\n");
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goto err_reg;
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}
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return 0;
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err_reg:
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err_gpio:
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omap_dss_put_device(ddata->in);
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return r;
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}
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static int lb035q02_panel_spi_remove(struct spi_device *spi)
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{
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struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
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struct omap_dss_device *dssdev = &ddata->dssdev;
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struct omap_dss_device *in = ddata->in;
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omapdss_unregister_display(dssdev);
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lb035q02_disable(dssdev);
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lb035q02_disconnect(dssdev);
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omap_dss_put_device(in);
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return 0;
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}
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static const struct of_device_id lb035q02_of_match[] = {
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{ .compatible = "omapdss,lgphilips,lb035q02", },
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{},
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};
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MODULE_DEVICE_TABLE(of, lb035q02_of_match);
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static struct spi_driver lb035q02_spi_driver = {
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.probe = lb035q02_panel_spi_probe,
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.remove = lb035q02_panel_spi_remove,
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.driver = {
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.name = "panel_lgphilips_lb035q02",
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.of_match_table = lb035q02_of_match,
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.suppress_bind_attrs = true,
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},
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};
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module_spi_driver(lb035q02_spi_driver);
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MODULE_ALIAS("spi:lgphilips,lb035q02");
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
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MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
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MODULE_LICENSE("GPL");
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