Release 4.9 drivers/usb/chipidea/host.c

/*
 * host.c - ChipIdea USB host controller driver
 *
 * Copyright (c) 2012 Intel Corporation
 *
 * Author: Alexander Shishkin
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/chipidea.h>
#include <linux/regulator/consumer.h>

#include "../host/ehci.h"

#include "ci.h"
#include "bits.h"
#include "host.h"


static struct hc_driver __read_mostly ci_ehci_hc_driver;

static int (*orig_bus_suspend)(struct usb_hcd *hcd);


struct ehci_ci_priv {
	
struct regulator *reg_vbus;
};



static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
	struct device *dev = hcd->self.controller;
	struct ci_hdrc *ci = dev_get_drvdata(dev);
	int ret = 0;
	int port = HCS_N_PORTS(ehci->hcs_params);

	if (priv->reg_vbus) {
		if (port > 1) {
			dev_warn(dev,
				"Not support multi-port regulator control\n");
			return 0;
		}
		if (enable)
			ret = regulator_enable(priv->reg_vbus);
		else
			ret = regulator_disable(priv->reg_vbus);
		if (ret) {
			dev_err(dev,
				"Failed to %s vbus regulator, ret=%d\n",
				enable ? "enable" : "disable", ret);
			return ret;
		}
	}

	if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
		/*
                 * Marvell 28nm HSIC PHY requires forcing the port to HS mode.
                 * As HSIC is always HS, this should be safe for others.
                 */
		hw_port_test_set(ci, 5);
		hw_port_test_set(ci, 0);
	}
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
michael grzeschik
michael grzeschik
143
77.72%
1
33.33%
rob herring
rob herring
31
16.85%
1
33.33%
peter chen
peter chen
10
5.43%
1
33.33%
Total
184
100.00%
3
100.00%

;



static int ehci_ci_reset(struct usb_hcd *hcd)
{
	struct device *dev = hcd->self.controller;
	struct ci_hdrc *ci = dev_get_drvdata(dev);
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int ret;

	ret = ehci_setup(hcd);
	if (ret)
		return ret;

	ehci->need_io_watchdog = 0;

	ci_platform_configure(ci);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
peter chen
peter chen
57
78.08%
1
50.00%
lucas stach
lucas stach
16
21.92%
1
50.00%
Total
73
100.00%
2
100.00%


static const struct ehci_driver_overrides ehci_ci_overrides = {
	.extra_priv_size = sizeof(struct ehci_ci_priv),
	.port_power	 = ehci_ci_portpower,
	.reset		 = ehci_ci_reset,
};



static irqreturn_t host_irq(struct ci_hdrc *ci)
{
	return usb_hcd_irq(ci->irq, ci->hcd);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
alexander shishkin
alexander shishkin
23
100.00%
2
100.00%
Total
23
100.00%
2
100.00%



static int host_start(struct ci_hdrc *ci)
{
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct ehci_ci_priv *priv;
	int ret;

	if (usb_disabled())
		return -ENODEV;

	hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
	if (!hcd)
		return -ENOMEM;

	dev_set_drvdata(ci->dev, ci);
	hcd->rsrc_start = ci->hw_bank.phys;
	hcd->rsrc_len = ci->hw_bank.size;
	hcd->regs = ci->hw_bank.abs;
	hcd->has_tt = 1;

	hcd->power_budget = ci->platdata->power_budget;
	hcd->tpl_support = ci->platdata->tpl_support;
	if (ci->phy)
		hcd->phy = ci->phy;
	else
		hcd->usb_phy = ci->usb_phy;

	ehci = hcd_to_ehci(hcd);
	ehci->caps = ci->hw_bank.cap;
	ehci->has_hostpc = ci->hw_bank.lpm;
	ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
	ehci->imx28_write_fix = ci->imx28_write_fix;

	priv = (struct ehci_ci_priv *)ehci->priv;
	priv->reg_vbus = NULL;

	if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
		if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
			ret = regulator_enable(ci->platdata->reg_vbus);
			if (ret) {
				dev_err(ci->dev,
				"Failed to enable vbus regulator, ret=%d\n",
									ret);
				goto put_hcd;
			}
		} else {
			priv->reg_vbus = ci->platdata->reg_vbus;
		}
	}

	ret = usb_add_hcd(hcd, 0, 0);
	if (ret) {
		goto disable_reg;
	} else {
		struct usb_otg *otg = &ci->otg;

		ci->hcd = hcd;

		if (ci_otg_is_fsm_mode(ci)) {
			otg->host = &hcd->self;
			hcd->self.otg_port = 1;
		}
	}

	return ret;

disable_reg:
	if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
			(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
		regulator_disable(ci->platdata->reg_vbus);
put_hcd:
	usb_put_hcd(hcd);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
alexander shishkin
alexander shishkin
158
39.40%
3
18.75%
li jun
li jun
123
30.67%
2
12.50%
peter chen
peter chen
51
12.72%
4
25.00%
antoine tenart
antoine tenart
25
6.23%
2
12.50%
michael grzeschik
michael grzeschik
25
6.23%
1
6.25%
tuomas tynkkynen
tuomas tynkkynen
10
2.49%
1
6.25%
richard zhao
richard zhao
7
1.75%
2
12.50%
fabio estevam
fabio estevam
2
0.50%
1
6.25%
Total
401
100.00%
16
100.00%



static void host_stop(struct ci_hdrc *ci)
{
	struct usb_hcd *hcd = ci->hcd;

	if (hcd) {
		usb_remove_hcd(hcd);
		ci->role = CI_ROLE_END;
		synchronize_irq(ci->irq);
		usb_put_hcd(hcd);
		if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
			(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
				regulator_disable(ci->platdata->reg_vbus);
	}
	ci->hcd = NULL;
	ci->otg.host = NULL;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
li jun
li jun
47
48.96%
2
28.57%
alexander shishkin
alexander shishkin
30
31.25%
2
28.57%
stefan wahren
stefan wahren
13
13.54%
1
14.29%
russell king
russell king
5
5.21%
1
14.29%
peter chen
peter chen
1
1.04%
1
14.29%
Total
96
100.00%
7
100.00%



void ci_hdrc_host_destroy(struct ci_hdrc *ci)
{
	if (ci->role == CI_ROLE_HOST && ci->hcd)
		host_stop(ci);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
peter chen
peter chen
27
100.00%
2
100.00%
Total
27
100.00%
2
100.00%



static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
{
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int port;
	u32 tmp;

	int ret = orig_bus_suspend(hcd);

	if (ret)
		return ret;

	port = HCS_N_PORTS(ehci->hcs_params);
	while (port--) {
		u32 __iomem *reg = &ehci->regs->port_status[port];
		u32 portsc = ehci_readl(ehci, reg);

		if (portsc & PORT_CONNECT) {
			/*
                         * For chipidea, the resume signal will be ended
                         * automatically, so for remote wakeup case, the
                         * usbcmd.rs may not be set before the resume has
                         * ended if other resume paths consumes too much
                         * time (~24ms), in that case, the SOF will not
                         * send out within 3ms after resume ends, then the
                         * high speed device will enter full speed mode.
                         */

			tmp = ehci_readl(ehci, &ehci->regs->command);
			tmp |= CMD_RUN;
			ehci_writel(ehci, tmp, &ehci->regs->command);
			/*
                         * It needs a short delay between set RS bit and PHCD.
                         */
			usleep_range(150, 200);
			break;
		}
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
peter chen
peter chen
136
100.00%
1
100.00%
Total
136
100.00%
1
100.00%



int ci_hdrc_host_init(struct ci_hdrc *ci)
{
	struct ci_role_driver *rdrv;

	if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
		return -ENXIO;

	rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
	if (!rdrv)
		return -ENOMEM;

	rdrv->start	= host_start;
	rdrv->stop	= host_stop;
	rdrv->irq	= host_irq;
	rdrv->name	= "host";
	ci->roles[CI_ROLE_HOST] = rdrv;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
alexander shishkin
alexander shishkin
89
95.70%
2
66.67%
peter chen
peter chen
4
4.30%
1
33.33%
Total
93
100.00%
3
100.00%



void ci_hdrc_host_driver_init(void)
{
	ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
	orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
	ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
peter chen
peter chen
18
64.29%
2
40.00%
alan stern
alan stern
7
25.00%
1
20.00%
michael grzeschik
michael grzeschik
2
7.14%
1
20.00%
alexander shishkin
alexander shishkin
1
3.57%
1
20.00%
Total
28
100.00%
5
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
alexander shishkin
alexander shishkin
325
28.29%
3
10.34%
peter chen
peter chen
325
28.29%
10
34.48%
michael grzeschik
michael grzeschik
203
17.67%
1
3.45%
li jun
li jun
170
14.80%
3
10.34%
rob herring
rob herring
31
2.70%
1
3.45%
antoine tenart
antoine tenart
25
2.18%
2
6.90%
alan stern
alan stern
17
1.48%
2
6.90%
lucas stach
lucas stach
16
1.39%
1
3.45%
stefan wahren
stefan wahren
13
1.13%
1
3.45%
tuomas tynkkynen
tuomas tynkkynen
10
0.87%
1
3.45%
richard zhao
richard zhao
7
0.61%
2
6.90%
russell king
russell king
5
0.44%
1
3.45%
fabio estevam
fabio estevam
2
0.17%
1
3.45%
Total
1149
100.00%
29
100.00%
  
Directory: drivers/usb/chipidea