Release 4.11 drivers/phy/phy-omap-usb2.c

Directory: drivers/phy
/*
 * omap-usb2.c - USB PHY, talking to musb controller in OMAP.
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Author: Kishon Vijay Abraham I <kishon@ti.com>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/io.h>
#include <linux/phy/omap_usb.h>
#include <linux/usb/phy_companion.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/phy/omap_control_phy.h>
#include <linux/phy/phy.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/of_platform.h>


#define USB2PHY_DISCON_BYP_LATCH (1 << 31)

#define USB2PHY_ANA_CONFIG1 0x4c

/**
 * omap_usb2_set_comparator - links the comparator present in the sytem with
 *      this phy
 * @comparator - the companion phy(comparator) for this phy
 *
 * The phy companion driver should call this API passing the phy_companion
 * filled with set_vbus and start_srp to be used by usb phy.
 *
 * For use by phy companion driver
 */


int omap_usb2_set_comparator(struct phy_companion *comparator)
{
	struct omap_usb	*phy;
	struct usb_phy	*x = usb_get_phy(USB_PHY_TYPE_USB2);

	if (IS_ERR(x))
		return -ENODEV;

	phy = phy_to_omapusb(x);
	phy->comparator = comparator;
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 52 100.00% 1 100.00%
Total 52 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);



static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
{
	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);

	if (!phy->comparator)
		return -ENODEV;

	return phy->comparator->set_vbus(phy->comparator, enabled);
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 50 98.04% 1 50.00%
Antoine Ténart 1 1.96% 1 50.00%
Total 51 100.00% 2 100.00%



static int omap_usb_start_srp(struct usb_otg *otg)
{
	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);

	if (!phy->comparator)
		return -ENODEV;

	return phy->comparator->start_srp(phy->comparator);
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 45 97.83% 1 50.00%
Antoine Ténart 1 2.17% 1 50.00%
Total 46 100.00% 2 100.00%



static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
{
	otg->host = host;
	if (!host)
		otg->state = OTG_STATE_UNDEFINED;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 35 97.22% 1 50.00%
Antoine Ténart 1 2.78% 1 50.00%
Total 36 100.00% 2 100.00%



static int omap_usb_set_peripheral(struct usb_otg *otg,
		struct usb_gadget *gadget)
{
	otg->gadget = gadget;
	if (!gadget)
		otg->state = OTG_STATE_UNDEFINED;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 35 97.22% 1 50.00%
Antoine Ténart 1 2.78% 1 50.00%
Total 36 100.00% 2 100.00%



static int omap_usb_phy_power(struct omap_usb *phy, int on)
{
	u32 val;
	int ret;

	if (!phy->syscon_phy_power) {
		omap_control_phy_power(phy->control_dev, on);
		return 0;
	}

	if (on)
		val = phy->power_on;
	else
		val = phy->power_off;

	ret = regmap_update_bits(phy->syscon_phy_power, phy->power_reg,
				 phy->mask, val);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%



static int omap_usb_power_off(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);

	return omap_usb_phy_power(phy, false);
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 29 100.00% 2 100.00%
Total 29 100.00% 2 100.00%



static int omap_usb_power_on(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);

	return omap_usb_phy_power(phy, true);
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 29 100.00% 2 100.00%
Total 29 100.00% 2 100.00%



static int omap_usb2_disable_clocks(struct omap_usb *phy)
{
	clk_disable(phy->wkupclk);
	if (!IS_ERR(phy->optclk))
		clk_disable(phy->optclk);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Sekhar Nori 38 100.00% 1 100.00%
Total 38 100.00% 1 100.00%



static int omap_usb2_enable_clocks(struct omap_usb *phy)
{
	int ret;

	ret = clk_enable(phy->wkupclk);
	if (ret < 0) {
		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
		goto err0;
	}

	if (!IS_ERR(phy->optclk)) {
		ret = clk_enable(phy->optclk);
		if (ret < 0) {
			dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
			goto err1;
		}
	}

	return 0;

err1:
	clk_disable(phy->wkupclk);

err0:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Sekhar Nori 105 100.00% 1 100.00%
Total 105 100.00% 1 100.00%



static int omap_usb_init(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);
	u32 val;

	omap_usb2_enable_clocks(phy);

	if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
		/*
                 *
                 * Reduce the sensitivity of internal PHY by enabling the
                 * DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
                 * resolves issues with certain devices which can otherwise
                 * be prone to false disconnects.
                 *
                 */
		val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);
		val |= USB2PHY_DISCON_BYP_LATCH;
		omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Austin Beam 64 92.75% 1 50.00%
Sekhar Nori 5 7.25% 1 50.00%
Total 69 100.00% 2 100.00%



static int omap_usb_exit(struct phy *x)
{
	struct omap_usb *phy = phy_get_drvdata(x);

	return omap_usb2_disable_clocks(phy);
}

Contributors
Person Tokens Prop Commits CommitProp
Sekhar Nori 27 100.00% 1 100.00%
Total 27 100.00% 1 100.00%


static const struct phy_ops ops = {
	.init		= omap_usb_init,
	.exit		= omap_usb_exit,
	.power_on	= omap_usb_power_on,
	.power_off	= omap_usb_power_off,
	.owner		= THIS_MODULE,
};


static const struct usb_phy_data omap_usb2_data = {
	.label = "omap_usb2",
	.flags = OMAP_USB2_HAS_START_SRP | OMAP_USB2_HAS_SET_VBUS,
	.mask = OMAP_DEV_PHY_PD,
	.power_off = OMAP_DEV_PHY_PD,
};


static const struct usb_phy_data omap5_usb2_data = {
	.label = "omap5_usb2",
	.flags = 0,
	.mask = OMAP_DEV_PHY_PD,
	.power_off = OMAP_DEV_PHY_PD,
};


static const struct usb_phy_data dra7x_usb2_data = {
	.label = "dra7x_usb2",
	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
	.mask = OMAP_DEV_PHY_PD,
	.power_off = OMAP_DEV_PHY_PD,
};


static const struct usb_phy_data dra7x_usb2_phy2_data = {
	.label = "dra7x_usb2_phy2",
	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
	.mask = OMAP_USB2_PHY_PD,
	.power_off = OMAP_USB2_PHY_PD,
};


static const struct usb_phy_data am437x_usb2_data = {
	.label = "am437x_usb2",
	.flags =  0,
	.mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD |
		AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
	.power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
	.power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,
};


static const struct of_device_id omap_usb2_id_table[] = {
	{
		.compatible = "ti,omap-usb2",
		.data = &omap_usb2_data,
        },
	{
		.compatible = "ti,omap5-usb2",
		.data = &omap5_usb2_data,
        },
	{
		.compatible = "ti,dra7x-usb2",
		.data = &dra7x_usb2_data,
        },
	{
		.compatible = "ti,dra7x-usb2-phy2",
		.data = &dra7x_usb2_phy2_data,
        },
	{
		.compatible = "ti,am437x-usb2",
		.data = &am437x_usb2_data,
        },
	{},
};
MODULE_DEVICE_TABLE(of, omap_usb2_id_table);



static int omap_usb2_probe(struct platform_device *pdev)
{
	struct omap_usb	*phy;
	struct phy *generic_phy;
	struct resource *res;
	struct phy_provider *phy_provider;
	struct usb_otg *otg;
	struct device_node *node = pdev->dev.of_node;
	struct device_node *control_node;
	struct platform_device *control_pdev;
	const struct of_device_id *of_id;
	struct usb_phy_data *phy_data;

	of_id = of_match_device(omap_usb2_id_table, &pdev->dev);

	if (!of_id)
		return -EINVAL;

	phy_data = (struct usb_phy_data *)of_id->data;

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

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

	phy->dev		= &pdev->dev;

	phy->phy.dev		= phy->dev;
	phy->phy.label		= phy_data->label;
	phy->phy.otg		= otg;
	phy->phy.type		= USB_PHY_TYPE_USB2;
	phy->mask		= phy_data->mask;
	phy->power_on		= phy_data->power_on;
	phy->power_off		= phy_data->power_off;

	if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(phy->phy_base))
			return PTR_ERR(phy->phy_base);
		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
	}

	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
							"syscon-phy-power");
	if (IS_ERR(phy->syscon_phy_power)) {
		dev_dbg(&pdev->dev,
			"can't get syscon-phy-power, using control device\n");
		phy->syscon_phy_power = NULL;

		control_node = of_parse_phandle(node, "ctrl-module", 0);
		if (!control_node) {
			dev_err(&pdev->dev,
				"Failed to get control device phandle\n");
			return -EINVAL;
		}

		control_pdev = of_find_device_by_node(control_node);
		if (!control_pdev) {
			dev_err(&pdev->dev, "Failed to get control device\n");
			return -EINVAL;
		}
		phy->control_dev = &control_pdev->dev;
	} else {
		if (of_property_read_u32_index(node,
					       "syscon-phy-power", 1,
					       &phy->power_reg)) {
			dev_err(&pdev->dev,
				"couldn't get power reg. offset\n");
			return -EINVAL;
		}
	}

	otg->set_host		= omap_usb_set_host;
	otg->set_peripheral	= omap_usb_set_peripheral;
	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
		otg->set_vbus		= omap_usb_set_vbus;
	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)
		otg->start_srp		= omap_usb_start_srp;
	otg->usb_phy		= &phy->phy;

	platform_set_drvdata(pdev, phy);
	pm_runtime_enable(phy->dev);

	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
	if (IS_ERR(generic_phy)) {
		pm_runtime_disable(phy->dev);
		return PTR_ERR(generic_phy);
	}

	phy_set_drvdata(generic_phy, phy);
	omap_usb_power_off(generic_phy);

	phy_provider = devm_of_phy_provider_register(phy->dev,
			of_phy_simple_xlate);
	if (IS_ERR(phy_provider)) {
		pm_runtime_disable(phy->dev);
		return PTR_ERR(phy_provider);
	}

	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
	if (IS_ERR(phy->wkupclk)) {
		dev_warn(&pdev->dev, "unable to get wkupclk, trying old name\n");
		phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
		if (IS_ERR(phy->wkupclk)) {
			dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
			pm_runtime_disable(phy->dev);
			return PTR_ERR(phy->wkupclk);
		} else {
			dev_warn(&pdev->dev,
				 "found usb_phy_cm_clk32k, please fix DTS\n");
		}
	}
	clk_prepare(phy->wkupclk);

	phy->optclk = devm_clk_get(phy->dev, "refclk");
	if (IS_ERR(phy->optclk)) {
		dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");
		phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
		if (IS_ERR(phy->optclk)) {
			dev_dbg(&pdev->dev,
				"unable to get usb_otg_ss_refclk960m\n");
		} else {
			dev_warn(&pdev->dev,
				 "found usb_otg_ss_refclk960m, please fix DTS\n");
		}
	}

	if (!IS_ERR(phy->optclk))
		clk_prepare(phy->optclk);

	usb_add_phy_dev(&phy->phy);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 452 58.02% 10 52.63%
Roger Quadros 183 23.49% 3 15.79%
George Cherian 54 6.93% 1 5.26%
Austin Beam 54 6.93% 1 5.26%
Oussama Ghorbel 16 2.05% 1 5.26%
Axel Lin 10 1.28% 1 5.26%
Himangi Saraogi 9 1.16% 1 5.26%
Antoine Ténart 1 0.13% 1 5.26%
Total 779 100.00% 19 100.00%



static int omap_usb2_remove(struct platform_device *pdev)
{
	struct omap_usb	*phy = platform_get_drvdata(pdev);

	clk_unprepare(phy->wkupclk);
	if (!IS_ERR(phy->optclk))
		clk_unprepare(phy->optclk);
	usb_remove_phy(&phy->phy);
	pm_runtime_disable(phy->dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 56 88.89% 2 66.67%
Roger Quadros 7 11.11% 1 33.33%
Total 63 100.00% 3 100.00%


static struct platform_driver omap_usb2_driver = {
	.probe		= omap_usb2_probe,
	.remove		= omap_usb2_remove,
	.driver		= {
		.name	= "omap-usb2",
		.of_match_table = omap_usb2_id_table,
        },
};


module_platform_driver(omap_usb2_driver);

MODULE_ALIAS("platform:omap_usb2");
MODULE_AUTHOR("Texas Instruments Inc.");
MODULE_DESCRIPTION("OMAP USB2 phy driver");
MODULE_LICENSE("GPL v2");
Overall Contributors
Person Tokens Prop Commits CommitProp
Kishon Vijay Abraham I 1089 59.41% 12 46.15%
Roger Quadros 193 10.53% 3 11.54%
Sekhar Nori 180 9.82% 1 3.85%
George Cherian 167 9.11% 2 7.69%
Austin Beam 162 8.84% 1 3.85%
Oussama Ghorbel 16 0.87% 1 3.85%
Axel Lin 12 0.65% 3 11.54%
Himangi Saraogi 9 0.49% 1 3.85%
Antoine Ténart 5 0.27% 2 7.69%
Total 1833 100.00% 26 100.00%
Directory: drivers/phy

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Kishon Vijay Abraham I	52	100.00%	1	100.00%
Total	52	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/phy/phy-omap-usb2.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
