mirror of https://gitee.com/openkylin/linux.git
380 lines
8.4 KiB
C
380 lines
8.4 KiB
C
/*
|
|
* 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");
|