/*
 * Analog TV Connector driver
 *
 * Copyright (C) 2013 Texas Instruments
 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <video/omapdss.h>
#include <video/omap-panel-data.h>

struct panel_drv_data {
        struct omap_dss_device dssdev;
        struct omap_dss_device *in;

        struct device *dev;

        struct omap_video_timings timings;

        enum omap_dss_venc_type connector_type;
        bool invert_polarity;
};

static const struct omap_video_timings tvc_pal_timings = {
        .x_res          = 720,
        .y_res          = 574,
        .pixel_clock    = 13500,
        .hsw            = 64,
        .hfp            = 12,
        .hbp            = 68,
        .vsw            = 5,
        .vfp            = 5,
        .vbp            = 41,

        .interlace      = true,
};

#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)

static int tvc_connect(struct omap_dss_device *dssdev)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;
        int r;

        dev_dbg(ddata->dev, "connect\n");

        if (omapdss_device_is_connected(dssdev))
                return 0;

        r = in->ops.atv->connect(in, dssdev);
        if (r)
                return r;

        return 0;
}

static void tvc_disconnect(struct omap_dss_device *dssdev)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;

        dev_dbg(ddata->dev, "disconnect\n");

        if (!omapdss_device_is_connected(dssdev))
                return;

        in->ops.atv->disconnect(in, dssdev);
}

static int tvc_enable(struct omap_dss_device *dssdev)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;
        int r;

        dev_dbg(ddata->dev, "enable\n");

        if (!omapdss_device_is_connected(dssdev))
                return -ENODEV;

        if (omapdss_device_is_enabled(dssdev))
                return 0;

        in->ops.atv->set_timings(in, &ddata->timings);

        in->ops.atv->set_type(in, ddata->connector_type);
        in->ops.atv->invert_vid_out_polarity(in, ddata->invert_polarity);

        r = in->ops.atv->enable(in);
        if (r)
                return r;

        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

        return r;
}

static void tvc_disable(struct omap_dss_device *dssdev)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;

        dev_dbg(ddata->dev, "disable\n");

        if (!omapdss_device_is_enabled(dssdev))
                return;

        in->ops.atv->disable(in);

        dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void tvc_set_timings(struct omap_dss_device *dssdev,
                struct omap_video_timings *timings)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;

        ddata->timings = *timings;
        dssdev->panel.timings = *timings;

        in->ops.atv->set_timings(in, timings);
}

static void tvc_get_timings(struct omap_dss_device *dssdev,
                struct omap_video_timings *timings)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);

        *timings = ddata->timings;
}

static int tvc_check_timings(struct omap_dss_device *dssdev,
                struct omap_video_timings *timings)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;

        return in->ops.atv->check_timings(in, timings);
}

static u32 tvc_get_wss(struct omap_dss_device *dssdev)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;

        return in->ops.atv->get_wss(in);
}

static int tvc_set_wss(struct omap_dss_device *dssdev, u32 wss)
{
        struct panel_drv_data *ddata = to_panel_data(dssdev);
        struct omap_dss_device *in = ddata->in;

        return in->ops.atv->set_wss(in, wss);
}

static struct omap_dss_driver tvc_driver = {
        .connect                = tvc_connect,
        .disconnect             = tvc_disconnect,

        .enable                 = tvc_enable,
        .disable                = tvc_disable,

        .set_timings            = tvc_set_timings,
        .get_timings            = tvc_get_timings,
        .check_timings          = tvc_check_timings,

        .get_resolution         = omapdss_default_get_resolution,

        .get_wss                = tvc_get_wss,
        .set_wss                = tvc_set_wss,
};

static int tvc_probe_pdata(struct platform_device *pdev)
{
        struct panel_drv_data *ddata = platform_get_drvdata(pdev);
        struct connector_atv_platform_data *pdata;
        struct omap_dss_device *in, *dssdev;

        pdata = dev_get_platdata(&pdev->dev);

        in = omap_dss_find_output(pdata->source);
        if (in == NULL) {
                dev_err(&pdev->dev, "Failed to find video source\n");
                return -ENODEV;
        }

        ddata->in = in;

        ddata->connector_type = pdata->connector_type;
        ddata->invert_polarity = ddata->invert_polarity;

        dssdev = &ddata->dssdev;
        dssdev->name = pdata->name;

        return 0;
}

static int tvc_probe(struct platform_device *pdev)
{
        struct panel_drv_data *ddata;
        struct omap_dss_device *dssdev;
        int r;

        ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
        if (!ddata)
                return -ENOMEM;

        platform_set_drvdata(pdev, ddata);
        ddata->dev = &pdev->dev;

        if (dev_get_platdata(&pdev->dev)) {
                r = tvc_probe_pdata(pdev);
                if (r)
                        return r;
        } else {
                return -ENODEV;
        }

        ddata->timings = tvc_pal_timings;

        dssdev = &ddata->dssdev;
        dssdev->driver = &tvc_driver;
        dssdev->dev = &pdev->dev;
        dssdev->type = OMAP_DISPLAY_TYPE_VENC;
        dssdev->owner = THIS_MODULE;
        dssdev->panel.timings = tvc_pal_timings;

        r = omapdss_register_display(dssdev);
        if (r) {
                dev_err(&pdev->dev, "Failed to register panel\n");
                goto err_reg;
        }

        return 0;
err_reg:
        omap_dss_put_device(ddata->in);
        return r;
}

static int __exit tvc_remove(struct platform_device *pdev)
{
        struct panel_drv_data *ddata = platform_get_drvdata(pdev);
        struct omap_dss_device *dssdev = &ddata->dssdev;
        struct omap_dss_device *in = ddata->in;

        omapdss_unregister_display(&ddata->dssdev);

        tvc_disable(dssdev);
        tvc_disconnect(dssdev);

        omap_dss_put_device(in);

        return 0;
}

static struct platform_driver tvc_connector_driver = {
        .probe  = tvc_probe,
        .remove = __exit_p(tvc_remove),
        .driver = {
                .name   = "connector-analog-tv",
                .owner  = THIS_MODULE,
        },
};

module_platform_driver(tvc_connector_driver);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("Analog TV Connector driver");
MODULE_LICENSE("GPL");