drivers/video/fbdev/omap2/displays-new/encoder-tpd12s015.c - kernel/bruno - Git at Google

 /*
  * TPD12S015 HDMI ESD protection & level shifter chip 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/completion.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
 #include <linux/platform_device.h>
 #include <linux/of_gpio.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;

 	int ct_cp_hpd_gpio;
 	int ls_oe_gpio;
 	int hpd_gpio;

 	struct omap_video_timings timings;
 };

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

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

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

 	dst->src = dssdev;
 	dssdev->dst = dst;

 	gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
 	/* DC-DC converter needs at max 300us to get to 90% of 5V */
 	udelay(300);

 	return 0;
 }

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

 	WARN_ON(dst != dssdev->dst);

 	if (dst != dssdev->dst)
 		return;

 	gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);

 	dst->src = NULL;
 	dssdev->dst = NULL;

 	in->ops.hdmi->disconnect(in, &ddata->dssdev);
 }

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

 	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 		return 0;

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

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

 	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

 	return r;
 }

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

 	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 		return;

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

 	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 }

 static void tpd_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.hdmi->set_timings(in, timings);
 }

 static void tpd_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 tpd_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;
 	int r;

 	r = in->ops.hdmi->check_timings(in, timings);

 	return r;
 }

 static int tpd_read_edid(struct omap_dss_device *dssdev,
 		u8 *edid, int len)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *in = ddata->in;
 	int r;

 	if (!gpio_get_value_cansleep(ddata->hpd_gpio))
 		return -ENODEV;

 	if (gpio_is_valid(ddata->ls_oe_gpio))
 		gpio_set_value_cansleep(ddata->ls_oe_gpio, 1);

 	r = in->ops.hdmi->read_edid(in, edid, len);

 	if (gpio_is_valid(ddata->ls_oe_gpio))
 		gpio_set_value_cansleep(ddata->ls_oe_gpio, 0);

 	return r;
 }

 static bool tpd_detect(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);

 	return gpio_get_value_cansleep(ddata->hpd_gpio);
 }

 static int tpd_set_infoframe(struct omap_dss_device *dssdev,
 		const struct hdmi_avi_infoframe *avi)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *in = ddata->in;

 	return in->ops.hdmi->set_infoframe(in, avi);
 }

 static int tpd_set_hdmi_mode(struct omap_dss_device *dssdev,
 		bool hdmi_mode)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *in = ddata->in;

 	return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
 }

 static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
 	.connect		= tpd_connect,
 	.disconnect		= tpd_disconnect,

 	.enable			= tpd_enable,
 	.disable		= tpd_disable,

 	.check_timings		= tpd_check_timings,
 	.set_timings		= tpd_set_timings,
 	.get_timings		= tpd_get_timings,

 	.read_edid		= tpd_read_edid,
 	.detect			= tpd_detect,
 	.set_infoframe		= tpd_set_infoframe,
 	.set_hdmi_mode		= tpd_set_hdmi_mode,
 };

 static int tpd_probe_pdata(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct encoder_tpd12s015_platform_data *pdata;
 	struct omap_dss_device *dssdev, *in;

 	pdata = dev_get_platdata(&pdev->dev);

 	ddata->ct_cp_hpd_gpio = pdata->ct_cp_hpd_gpio;
 	ddata->ls_oe_gpio = pdata->ls_oe_gpio;
 	ddata->hpd_gpio = pdata->hpd_gpio;

 	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;

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

 	return 0;
 }

 static int tpd_probe_of(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct device_node *node = pdev->dev.of_node;
 	struct omap_dss_device *in;
 	int gpio;

 	/* CT CP HPD GPIO */
 	gpio = of_get_gpio(node, 0);
 	if (!gpio_is_valid(gpio)) {
 		dev_err(&pdev->dev, "failed to parse CT CP HPD gpio\n");
 		return gpio;
 	}
 	ddata->ct_cp_hpd_gpio = gpio;

 	/* LS OE GPIO */
 	gpio = of_get_gpio(node, 1);
 	if (gpio_is_valid(gpio) || gpio == -ENOENT) {
 		ddata->ls_oe_gpio = gpio;
 	} else {
 		dev_err(&pdev->dev, "failed to parse LS OE gpio\n");
 		return gpio;
 	}

 	/* HPD GPIO */
 	gpio = of_get_gpio(node, 2);
 	if (!gpio_is_valid(gpio)) {
 		dev_err(&pdev->dev, "failed to parse HPD gpio\n");
 		return gpio;
 	}
 	ddata->hpd_gpio = gpio;

 	in = omapdss_of_find_source_for_first_ep(node);
 	if (IS_ERR(in)) {
 		dev_err(&pdev->dev, "failed to find video source\n");
 		return PTR_ERR(in);
 	}

 	ddata->in = in;

 	return 0;
 }

 static int tpd_probe(struct platform_device *pdev)
 {
 	struct omap_dss_device *in, *dssdev;
 	struct panel_drv_data *ddata;
 	int r;

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

 	platform_set_drvdata(pdev, ddata);

 	if (dev_get_platdata(&pdev->dev)) {
 		r = tpd_probe_pdata(pdev);
 		if (r)
 			return r;
 	} else if (pdev->dev.of_node) {
 		r = tpd_probe_of(pdev);
 		if (r)
 			return r;
 	} else {
 		return -ENODEV;
 	}

 	r = devm_gpio_request_one(&pdev->dev, ddata->ct_cp_hpd_gpio,
 			GPIOF_OUT_INIT_LOW, "hdmi_ct_cp_hpd");
 	if (r)
 		goto err_gpio;

 	if (gpio_is_valid(ddata->ls_oe_gpio)) {
 		r = devm_gpio_request_one(&pdev->dev, ddata->ls_oe_gpio,
 				GPIOF_OUT_INIT_LOW, "hdmi_ls_oe");
 		if (r)
 			goto err_gpio;
 	}

 	r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
 			GPIOF_DIR_IN, "hdmi_hpd");
 	if (r)
 		goto err_gpio;

 	dssdev = &ddata->dssdev;
 	dssdev->ops.hdmi = &tpd_hdmi_ops;
 	dssdev->dev = &pdev->dev;
 	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
 	dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->port_num = 1;

 	in = ddata->in;

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

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

 static int __exit tpd_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_output(&ddata->dssdev);

 	WARN_ON(omapdss_device_is_enabled(dssdev));
 	if (omapdss_device_is_enabled(dssdev))
 		tpd_disable(dssdev);

 	WARN_ON(omapdss_device_is_connected(dssdev));
 	if (omapdss_device_is_connected(dssdev))
 		tpd_disconnect(dssdev, dssdev->dst);

 	omap_dss_put_device(in);

 	return 0;
 }

 static const struct of_device_id tpd_of_match[] = {
 	{ .compatible = "omapdss,ti,tpd12s015", },
 	{},
 };

 MODULE_DEVICE_TABLE(of, tpd_of_match);

 static struct platform_driver tpd_driver = {
 	.probe	= tpd_probe,
 	.remove	= __exit_p(tpd_remove),
 	.driver	= {
 		.name	= "tpd12s015",
 		.of_match_table = tpd_of_match,
 		.suppress_bind_attrs = true,
 	},
 };

 module_platform_driver(tpd_driver);

 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 MODULE_DESCRIPTION("TPD12S015 driver");
 MODULE_LICENSE("GPL");
	/*
	* TPD12S015 HDMI ESD protection & level shifter chip 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/completion.h>
	#include <linux/delay.h>
	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/gpio.h>
	#include <linux/platform_device.h>
	#include <linux/of_gpio.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;

	int ct_cp_hpd_gpio;
	int ls_oe_gpio;
	int hpd_gpio;

	struct omap_video_timings timings;
	};

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

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

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

	dst->src = dssdev;
	dssdev->dst = dst;

	gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
	/* DC-DC converter needs at max 300us to get to 90% of 5V */
	udelay(300);

	return 0;
	}

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

	WARN_ON(dst != dssdev->dst);

	if (dst != dssdev->dst)
	return;

	gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);

	dst->src = NULL;
	dssdev->dst = NULL;

	in->ops.hdmi->disconnect(in, &ddata->dssdev);
	}

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

	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
	return 0;

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

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

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return r;
	}

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

	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
	return;

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

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	}

	static void tpd_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.hdmi->set_timings(in, timings);
	}

	static void tpd_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 tpd_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;
	int r;

	r = in->ops.hdmi->check_timings(in, timings);

	return r;
	}

	static int tpd_read_edid(struct omap_dss_device *dssdev,
	u8 *edid, int len)
	{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (!gpio_get_value_cansleep(ddata->hpd_gpio))
	return -ENODEV;

	if (gpio_is_valid(ddata->ls_oe_gpio))
	gpio_set_value_cansleep(ddata->ls_oe_gpio, 1);

	r = in->ops.hdmi->read_edid(in, edid, len);

	if (gpio_is_valid(ddata->ls_oe_gpio))
	gpio_set_value_cansleep(ddata->ls_oe_gpio, 0);

	return r;
	}

	static bool tpd_detect(struct omap_dss_device *dssdev)
	{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	return gpio_get_value_cansleep(ddata->hpd_gpio);
	}

	static int tpd_set_infoframe(struct omap_dss_device *dssdev,
	const struct hdmi_avi_infoframe *avi)
	{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.hdmi->set_infoframe(in, avi);
	}

	static int tpd_set_hdmi_mode(struct omap_dss_device *dssdev,
	bool hdmi_mode)
	{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
	}

	static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
	.connect = tpd_connect,
	.disconnect = tpd_disconnect,

	.enable = tpd_enable,
	.disable = tpd_disable,

	.check_timings = tpd_check_timings,
	.set_timings = tpd_set_timings,
	.get_timings = tpd_get_timings,

	.read_edid = tpd_read_edid,
	.detect = tpd_detect,
	.set_infoframe = tpd_set_infoframe,
	.set_hdmi_mode = tpd_set_hdmi_mode,
	};

	static int tpd_probe_pdata(struct platform_device *pdev)
	{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct encoder_tpd12s015_platform_data *pdata;
	struct omap_dss_device dssdev, in;

	pdata = dev_get_platdata(&pdev->dev);

	ddata->ct_cp_hpd_gpio = pdata->ct_cp_hpd_gpio;
	ddata->ls_oe_gpio = pdata->ls_oe_gpio;
	ddata->hpd_gpio = pdata->hpd_gpio;

	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;

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

	return 0;
	}

	static int tpd_probe_of(struct platform_device *pdev)
	{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct device_node *node = pdev->dev.of_node;
	struct omap_dss_device *in;
	int gpio;

	/* CT CP HPD GPIO */
	gpio = of_get_gpio(node, 0);
	if (!gpio_is_valid(gpio)) {
	dev_err(&pdev->dev, "failed to parse CT CP HPD gpio\n");
	return gpio;
	}
	ddata->ct_cp_hpd_gpio = gpio;

	/* LS OE GPIO */
	gpio = of_get_gpio(node, 1);
	if (gpio_is_valid(gpio) \|\| gpio == -ENOENT) {
	ddata->ls_oe_gpio = gpio;
	} else {
	dev_err(&pdev->dev, "failed to parse LS OE gpio\n");
	return gpio;
	}

	/* HPD GPIO */
	gpio = of_get_gpio(node, 2);
	if (!gpio_is_valid(gpio)) {
	dev_err(&pdev->dev, "failed to parse HPD gpio\n");
	return gpio;
	}
	ddata->hpd_gpio = gpio;

	in = omapdss_of_find_source_for_first_ep(node);
	if (IS_ERR(in)) {
	dev_err(&pdev->dev, "failed to find video source\n");
	return PTR_ERR(in);
	}

	ddata->in = in;

	return 0;
	}

	static int tpd_probe(struct platform_device *pdev)
	{
	struct omap_dss_device in, dssdev;
	struct panel_drv_data *ddata;
	int r;

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

	platform_set_drvdata(pdev, ddata);

	if (dev_get_platdata(&pdev->dev)) {
	r = tpd_probe_pdata(pdev);
	if (r)
	return r;
	} else if (pdev->dev.of_node) {
	r = tpd_probe_of(pdev);
	if (r)
	return r;
	} else {
	return -ENODEV;
	}

	r = devm_gpio_request_one(&pdev->dev, ddata->ct_cp_hpd_gpio,
	GPIOF_OUT_INIT_LOW, "hdmi_ct_cp_hpd");
	if (r)
	goto err_gpio;

	if (gpio_is_valid(ddata->ls_oe_gpio)) {
	r = devm_gpio_request_one(&pdev->dev, ddata->ls_oe_gpio,
	GPIOF_OUT_INIT_LOW, "hdmi_ls_oe");
	if (r)
	goto err_gpio;
	}

	r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
	GPIOF_DIR_IN, "hdmi_hpd");
	if (r)
	goto err_gpio;

	dssdev = &ddata->dssdev;
	dssdev->ops.hdmi = &tpd_hdmi_ops;
	dssdev->dev = &pdev->dev;
	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
	dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
	dssdev->owner = THIS_MODULE;
	dssdev->port_num = 1;

	in = ddata->in;

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

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

	static int __exit tpd_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_output(&ddata->dssdev);

	WARN_ON(omapdss_device_is_enabled(dssdev));
	if (omapdss_device_is_enabled(dssdev))
	tpd_disable(dssdev);

	WARN_ON(omapdss_device_is_connected(dssdev));
	if (omapdss_device_is_connected(dssdev))
	tpd_disconnect(dssdev, dssdev->dst);

	omap_dss_put_device(in);

	return 0;
	}

	static const struct of_device_id tpd_of_match[] = {
	{ .compatible = "omapdss,ti,tpd12s015", },
	{},
	};

	MODULE_DEVICE_TABLE(of, tpd_of_match);

	static struct platform_driver tpd_driver = {
	.probe = tpd_probe,
	.remove = __exit_p(tpd_remove),
	.driver = {
	.name = "tpd12s015",
	.of_match_table = tpd_of_match,
	.suppress_bind_attrs = true,
	},
	};

	module_platform_driver(tpd_driver);

	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
	MODULE_DESCRIPTION("TPD12S015 driver");
	MODULE_LICENSE("GPL");