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321 lines
6.8 KiB
C
321 lines
6.8 KiB
C
/*
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* Analog TV Connector 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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*
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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/slab.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <video/omapdss.h>
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#include <video/omap-panel-data.h>
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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 device *dev;
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struct omap_video_timings timings;
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enum omap_dss_venc_type connector_type;
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bool invert_polarity;
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};
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static const struct omap_video_timings tvc_pal_timings = {
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.x_res = 720,
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.y_res = 574,
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.pixelclock = 13500000,
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.hsw = 64,
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.hfp = 12,
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.hbp = 68,
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.vsw = 5,
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.vfp = 5,
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.vbp = 41,
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.interlace = true,
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};
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static const struct of_device_id tvc_of_match[];
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struct tvc_of_data {
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enum omap_dss_venc_type connector_type;
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};
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#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
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static int tvc_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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dev_dbg(ddata->dev, "connect\n");
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if (omapdss_device_is_connected(dssdev))
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return 0;
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r = in->ops.atv->connect(in, dssdev);
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if (r)
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return r;
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return 0;
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}
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static void tvc_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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dev_dbg(ddata->dev, "disconnect\n");
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if (!omapdss_device_is_connected(dssdev))
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return;
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in->ops.atv->disconnect(in, dssdev);
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}
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static int tvc_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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dev_dbg(ddata->dev, "enable\n");
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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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in->ops.atv->set_timings(in, &ddata->timings);
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if (!ddata->dev->of_node) {
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in->ops.atv->set_type(in, ddata->connector_type);
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in->ops.atv->invert_vid_out_polarity(in,
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ddata->invert_polarity);
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}
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r = in->ops.atv->enable(in);
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if (r)
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return r;
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return r;
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}
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static void tvc_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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dev_dbg(ddata->dev, "disable\n");
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if (!omapdss_device_is_enabled(dssdev))
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return;
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in->ops.atv->disable(in);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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}
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static void tvc_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->timings = *timings;
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dssdev->panel.timings = *timings;
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in->ops.atv->set_timings(in, timings);
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}
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static void tvc_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->timings;
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}
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static int tvc_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.atv->check_timings(in, timings);
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}
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static u32 tvc_get_wss(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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return in->ops.atv->get_wss(in);
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}
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static int tvc_set_wss(struct omap_dss_device *dssdev, u32 wss)
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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.atv->set_wss(in, wss);
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}
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static struct omap_dss_driver tvc_driver = {
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.connect = tvc_connect,
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.disconnect = tvc_disconnect,
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.enable = tvc_enable,
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.disable = tvc_disable,
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.set_timings = tvc_set_timings,
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.get_timings = tvc_get_timings,
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.check_timings = tvc_check_timings,
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.get_resolution = omapdss_default_get_resolution,
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.get_wss = tvc_get_wss,
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.set_wss = tvc_set_wss,
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};
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static int tvc_probe_pdata(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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struct connector_atv_platform_data *pdata;
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struct omap_dss_device *in, *dssdev;
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pdata = dev_get_platdata(&pdev->dev);
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in = omap_dss_find_output(pdata->source);
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if (in == NULL) {
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dev_err(&pdev->dev, "Failed to find video source\n");
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return -EPROBE_DEFER;
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}
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ddata->in = in;
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ddata->connector_type = pdata->connector_type;
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ddata->invert_polarity = ddata->invert_polarity;
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dssdev = &ddata->dssdev;
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dssdev->name = pdata->name;
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return 0;
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}
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static int tvc_probe_of(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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struct device_node *node = pdev->dev.of_node;
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struct omap_dss_device *in;
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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(&pdev->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 tvc_probe(struct platform_device *pdev)
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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(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
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if (!ddata)
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return -ENOMEM;
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platform_set_drvdata(pdev, ddata);
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ddata->dev = &pdev->dev;
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if (dev_get_platdata(&pdev->dev)) {
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r = tvc_probe_pdata(pdev);
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if (r)
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return r;
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} else if (pdev->dev.of_node) {
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r = tvc_probe_of(pdev);
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if (r)
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return r;
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} else {
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return -ENODEV;
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}
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ddata->timings = tvc_pal_timings;
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dssdev = &ddata->dssdev;
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dssdev->driver = &tvc_driver;
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dssdev->dev = &pdev->dev;
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dssdev->type = OMAP_DISPLAY_TYPE_VENC;
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dssdev->owner = THIS_MODULE;
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dssdev->panel.timings = tvc_pal_timings;
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r = omapdss_register_display(dssdev);
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if (r) {
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dev_err(&pdev->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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omap_dss_put_device(ddata->in);
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return r;
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}
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static int __exit tvc_remove(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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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(&ddata->dssdev);
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tvc_disable(dssdev);
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tvc_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 tvc_of_match[] = {
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{ .compatible = "omapdss,svideo-connector", },
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{ .compatible = "omapdss,composite-video-connector", },
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{},
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};
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MODULE_DEVICE_TABLE(of, tvc_of_match);
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static struct platform_driver tvc_connector_driver = {
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.probe = tvc_probe,
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.remove = __exit_p(tvc_remove),
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.driver = {
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.name = "connector-analog-tv",
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.of_match_table = tvc_of_match,
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.suppress_bind_attrs = true,
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},
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};
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module_platform_driver(tvc_connector_driver);
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
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MODULE_DESCRIPTION("Analog TV Connector driver");
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MODULE_LICENSE("GPL");
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