Release 4.11 drivers/usb/host/ohci-at91.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 *  Copyright (C) 2004 SAN People (Pty) Ltd.
 *  Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
 *
 * AT91 Bus Glue
 *
 * Based on fragments of 2.4 driver by Rick Bronson.
 * Based on ohci-omap.c
 *
 * This file is licenced under the GPL.
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/gpio/consumer.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/platform_data/atmel.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <soc/at91/atmel-sfr.h>

#include "ohci.h"


#define valid_port(index)	((index) >= 0 && (index) < AT91_MAX_USBH_PORTS)

#define at91_for_each_port(index)	\
		for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++)

/* interface, function and usb clocks; sometimes also an AHB clock */

#define hcd_to_ohci_at91_priv(h) \
	((struct ohci_at91_priv *)hcd_to_ohci(h)->priv)


#define AT91_MAX_USBH_PORTS	3

struct at91_usbh_data {
	
struct gpio_desc *vbus_pin[AT91_MAX_USBH_PORTS];
	
struct gpio_desc *overcurrent_pin[AT91_MAX_USBH_PORTS];
	
u8 ports;				/* number of ports on root hub */
	
u8 overcurrent_supported;
	
u8 overcurrent_status[AT91_MAX_USBH_PORTS];
	
u8 overcurrent_changed[AT91_MAX_USBH_PORTS];
};


struct ohci_at91_priv {
	
struct clk *iclk;
	
struct clk *fclk;
	
struct clk *hclk;
	
bool clocked;
	
bool wakeup;		/* Saved wake-up state for resume */
	
struct regmap *sfr_regmap;
};
/* interface and function clocks; sometimes also an AHB clock */


#define DRIVER_DESC "OHCI Atmel driver"


static const char hcd_name[] = "ohci-atmel";


static struct hc_driver __read_mostly ohci_at91_hc_driver;


static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = {
	.extra_priv_size = sizeof(struct ohci_at91_priv),
};

/*-------------------------------------------------------------------------*/



static void at91_start_clock(struct ohci_at91_priv *ohci_at91)
{
	if (ohci_at91->clocked)
		return;

	clk_set_rate(ohci_at91->fclk, 48000000);
	clk_prepare_enable(ohci_at91->hclk);
	clk_prepare_enable(ohci_at91->iclk);
	clk_prepare_enable(ohci_at91->fclk);
	ohci_at91->clocked = true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Victor
21
38.89%
1
16.67%
Sylvain Rochet
20
37.04%
2
33.33%
Boris Brezillon
13
24.07%
3
50.00%
Total
54
100.00%
6
100.00%



static void at91_stop_clock(struct ohci_at91_priv *ohci_at91)
{
	if (!ohci_at91->clocked)
		return;

	clk_disable_unprepare(ohci_at91->fclk);
	clk_disable_unprepare(ohci_at91->iclk);
	clk_disable_unprepare(ohci_at91->hclk);
	ohci_at91->clocked = false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Victor
22
47.83%
1
25.00%
Sylvain Rochet
21
45.65%
2
50.00%
Boris Brezillon
3
6.52%
1
25.00%
Total
46
100.00%
4
100.00%



static void at91_start_hc(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_regs __iomem *regs = hcd->regs;
	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);

	dev_dbg(&pdev->dev, "start\n");

	/*
         * Start the USB clocks.
         */
	at91_start_clock(ohci_at91);

	/*
         * The USB host controller must remain in reset.
         */
	writel(0, &regs->control);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Victor
53
77.94%
2
50.00%
Sylvain Rochet
13
19.12%
1
25.00%
David Brownell
2
2.94%
1
25.00%
Total
68
100.00%
4
100.00%



static void at91_stop_hc(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct ohci_regs __iomem *regs = hcd->regs;
	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);

	dev_dbg(&pdev->dev, "stop\n");

	/*
         * Put the USB host controller into reset.
         */
	writel(0, &regs->control);

	/*
         * Stop the USB clocks.
         */
	at91_stop_clock(ohci_at91);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Victor
53
77.94%
2
50.00%
Sylvain Rochet
13
19.12%
1
25.00%
David Brownell
2
2.94%
1
25.00%
Total
68
100.00%
4
100.00%

/*-------------------------------------------------------------------------*/

static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);



static struct regmap *at91_dt_syscon_sfr(void)
{
	struct regmap *regmap;

	regmap = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr");
	if (IS_ERR(regmap))
		regmap = NULL;

	return regmap;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Wenyou Yang
35
97.22%
1
50.00%
Wei Yongjun
1
2.78%
1
50.00%
Total
36
100.00%
2
100.00%

/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */


/**
 * usb_hcd_at91_probe - initialize AT91-based HCDs
 * Context: !in_interrupt()
 *
 * Allocates basic resources for this USB host controller, and
 * then invokes the start() method for the HCD associated with it
 * through the hotplug entry's driver_data.
 */


static int usb_hcd_at91_probe(const struct hc_driver *driver,
			struct platform_device *pdev)
{
	struct at91_usbh_data *board;
	struct ohci_hcd *ohci;
	int retval;
	struct usb_hcd *hcd;
	struct ohci_at91_priv *ohci_at91;
	struct device *dev = &pdev->dev;
	struct resource *res;
	int irq;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_dbg(dev, "hcd probe: missing irq resource\n");
		return irq;
	}

	hcd = usb_create_hcd(driver, dev, "at91");
	if (!hcd)
		return -ENOMEM;
	ohci_at91 = hcd_to_ohci_at91_priv(hcd);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(hcd->regs)) {
		retval = PTR_ERR(hcd->regs);
		goto err;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	ohci_at91->iclk = devm_clk_get(dev, "ohci_clk");
	if (IS_ERR(ohci_at91->iclk)) {
		dev_err(dev, "failed to get ohci_clk\n");
		retval = PTR_ERR(ohci_at91->iclk);
		goto err;
	}
	ohci_at91->fclk = devm_clk_get(dev, "uhpck");
	if (IS_ERR(ohci_at91->fclk)) {
		dev_err(dev, "failed to get uhpck\n");
		retval = PTR_ERR(ohci_at91->fclk);
		goto err;
	}
	ohci_at91->hclk = devm_clk_get(dev, "hclk");
	if (IS_ERR(ohci_at91->hclk)) {
		dev_err(dev, "failed to get hclk\n");
		retval = PTR_ERR(ohci_at91->hclk);
		goto err;
	}

	ohci_at91->sfr_regmap = at91_dt_syscon_sfr();
	if (!ohci_at91->sfr_regmap)
		dev_warn(dev, "failed to find sfr node\n");

	board = hcd->self.controller->platform_data;
	ohci = hcd_to_ohci(hcd);
	ohci->num_ports = board->ports;
	at91_start_hc(pdev);

	/*
         * The RemoteWakeupConnected bit has to be set explicitly
         * before calling ohci_run. The reset value of this bit is 0.
         */
	ohci->hc_control = OHCI_CTRL_RWC;

	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (retval == 0) {
		device_wakeup_enable(hcd->self.controller);
		return retval;
	}

	/* Error handling */
	at91_stop_hc(pdev);

 err:
	usb_put_hcd(hcd);
	return retval;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Victor
141
35.07%
2
11.76%
Jean-Christophe Plagniol-Villard
76
18.91%
2
11.76%
Boris Brezillon
54
13.43%
3
17.65%
Manjunath Goudar
33
8.21%
1
5.88%
Sylvain Rochet
30
7.46%
1
5.88%
Wenyou Yang
28
6.97%
2
11.76%
Varka Bhadram
23
5.72%
1
5.88%
Peter Chen
10
2.49%
1
5.88%
Nicolas Ferre
3
0.75%
2
11.76%
Arnd Bergmann
2
0.50%
1
5.88%
David Brownell
2
0.50%
1
5.88%
Total
402
100.00%
17
100.00%

/* may be called with controller, bus, and devices active */

/**
 * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
 * @dev: USB Host Controller being removed
 * Context: !in_interrupt()
 *
 * Reverses the effect of usb_hcd_at91_probe(), first invoking
 * the HCD's stop() method.  It is always called from a thread
 * context, "rmmod" or something similar.
 *
 */


static void usb_hcd_at91_remove(struct usb_hcd *hcd,
				struct platform_device *pdev)
{
	usb_remove_hcd(hcd);
	at91_stop_hc(pdev);
	usb_put_hcd(hcd);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Victor
24
77.42%
1
33.33%
Pete Zaitcev
6
19.35%
1
33.33%
Arnd Bergmann
1
3.23%
1
33.33%
Total
31
100.00%
3
100.00%

/*-------------------------------------------------------------------------*/


static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
{
	if (!valid_port(port))
		return;

	gpiod_set_value(pdata->vbus_pin[port], enable);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Petazzoni
33
86.84%
1
33.33%
Nicolas Ferre
4
10.53%
1
33.33%
Wenyou Yang
1
2.63%
1
33.33%
Total
38
100.00%
3
100.00%



static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
{
	if (!valid_port(port))
		return -EINVAL;

	return gpiod_get_value(pdata->vbus_pin[port]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Petazzoni
31
83.78%
1
25.00%
Nicolas Ferre
4
10.81%
1
25.00%
Wenyou Yang
1
2.70%
1
25.00%
Jean-Christophe Plagniol-Villard
1
2.70%
1
25.00%
Total
37
100.00%
4
100.00%

/*
 * Update the status data from the hub with the over-current indicator change.
 */


static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
	int length = ohci_hub_status_data(hcd, buf);
	int port;

	at91_for_each_port(port) {
		if (pdata->overcurrent_changed[port]) {
			if (!length)
				length = 1;
			buf[0] |= 1 << (port + 1);
		}
	}

	return length;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Petazzoni
78
93.98%
1
25.00%
Manjunath Goudar
2
2.41%
1
25.00%
Nicolas Ferre
2
2.41%
1
25.00%
Laurent Pinchart
1
1.20%
1
25.00%
Total
83
100.00%
4
100.00%



static int ohci_at91_port_suspend(struct regmap *regmap, u8 set)
{
	u32 regval;
	int ret;

	if (!regmap)
		return 0;

	ret = regmap_read(regmap, AT91_SFR_OHCIICR, &regval);
	if (ret)
		return ret;

	if (set)
		regval |= AT91_OHCIICR_USB_SUSPEND;
	else
		regval &= ~AT91_OHCIICR_USB_SUSPEND;

	regmap_write(regmap, AT91_SFR_OHCIICR, regval);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Wenyou Yang
73
100.00%
1
100.00%
Total
73
100.00%
1
100.00%

/*
 * Look at the control requests to the root hub and see if we need to override.
 */


static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
				 u16 wIndex, char *buf, u16 wLength)
{
	struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller);
	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
	struct usb_hub_descriptor *desc;
	int ret = -EINVAL;
	u32 *data = (u32 *)buf;

	dev_dbg(hcd->self.controller,
		"ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
		hcd, typeReq, wValue, wIndex, buf, wLength);

	wIndex--;

	switch (typeReq) {
	case SetPortFeature:
		switch (wValue) {
		case USB_PORT_FEAT_POWER:
			dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
			if (valid_port(wIndex)) {
				ohci_at91_usb_set_power(pdata, wIndex, 1);
				ret = 0;
			}

			goto out;

		case USB_PORT_FEAT_SUSPEND:
			dev_dbg(hcd->self.controller, "SetPortFeat: SUSPEND\n");
			if (valid_port(wIndex) && ohci_at91->sfr_regmap) {
				ohci_at91_port_suspend(ohci_at91->sfr_regmap,
						       1);
				return 0;
			}
			break;
		}
		break;

	case ClearPortFeature:
		switch (wValue) {
		case USB_PORT_FEAT_C_OVER_CURRENT:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: C_OVER_CURRENT\n");

			if (valid_port(wIndex)) {
				pdata->overcurrent_changed[wIndex] = 0;
				pdata->overcurrent_status[wIndex] = 0;
			}

			goto out;

		case USB_PORT_FEAT_OVER_CURRENT:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: OVER_CURRENT\n");

			if (valid_port(wIndex))
				pdata->overcurrent_status[wIndex] = 0;

			goto out;

		case USB_PORT_FEAT_POWER:
			dev_dbg(hcd->self.controller,
				"ClearPortFeature: POWER\n");

			if (valid_port(wIndex)) {
				ohci_at91_usb_set_power(pdata, wIndex, 0);
				return 0;
			}
			break;

		case USB_PORT_FEAT_SUSPEND:
			dev_dbg(hcd->self.controller, "ClearPortFeature: SUSPEND\n");
			if (valid_port(wIndex) && ohci_at91->sfr_regmap) {
				ohci_at91_port_suspend(ohci_at91->sfr_regmap,
						       0);
				return 0;
			}
			break;
		}
		break;
	}

	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
	if (ret)
		goto out;

	switch (typeReq) {
	case GetHubDescriptor:

		/* update the hub's descriptor */

		desc = (struct usb_hub_descriptor *)buf;

		dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
			desc->wHubCharacteristics);

		/* remove the old configurations for power-switching, and
                 * over-current protection, and insert our new configuration
                 */

		desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
		desc->wHubCharacteristics |=
			cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM);

		if (pdata->overcurrent_supported) {
			desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
			desc->wHubCharacteristics |=
				cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM);
		}

		dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
			desc->wHubCharacteristics);

		return ret;

	case GetPortStatus:
		/* check port status */

		dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);

		if (valid_port(wIndex)) {
			if (!ohci_at91_usb_get_power(pdata, wIndex))
				*data &= ~cpu_to_le32(RH_PS_PPS);

			if (pdata->overcurrent_changed[wIndex])
				*data |= cpu_to_le32(RH_PS_OCIC);

			if (pdata->overcurrent_status[wIndex])
				*data |= cpu_to_le32(RH_PS_POCI);
		}
	}

 out:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Petazzoni
434
76.81%
1
14.29%
Wenyou Yang
87
15.40%
1
14.29%
Nicolas Ferre
30
5.31%
1
14.29%
Jelle Martijn Kok
8
1.42%
1
14.29%
Jingoo Han
3
0.53%
1
14.29%
Sergei Shtylyov
2
0.35%
1
14.29%
Laurent Pinchart
1
0.18%
1
14.29%
Total
565
100.00%
7
100.00%

/*-------------------------------------------------------------------------*/



static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
{
	struct platform_device *pdev = data;
	struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev);
	int val, port;

	/* From the GPIO notifying the over-current situation, find
         * out the corresponding port */
	at91_for_each_port(port) {
		if (gpiod_to_irq(pdata->overcurrent_pin[port]) == irq)
			break;
	}

	if (port == AT91_MAX_USBH_PORTS) {
		dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
		return IRQ_HANDLED;
	}

	val = gpiod_get_value(pdata->overcurrent_pin[port]);

	/* When notified of an over-current situation, disable power
           on the corresponding port, and mark this port in
           over-current. */
	if (!val) {
		ohci_at91_usb_set_power(pdata, port, 0);
		pdata->overcurrent_status[port]  = 1;
		pdata->overcurrent_changed[port] = 1;
	}

	dev_dbg(& pdev->dev, "overcurrent situation %s\n",
		val ? "exited" : "notified");

	return IRQ_HANDLED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Petazzoni
127
86.39%
1
16.67%
Wenyou Yang
8
5.44%
1
16.67%
Nicolas Ferre
6
4.08%
2
33.33%
Jingoo Han
4
2.72%
1
16.67%
Andrew Victor
2
1.36%
1
16.67%
Total
147
100.00%
6
100.00%


static const struct of_device_id at91_ohci_dt_ids[] = {
	{ .compatible = "atmel,at91rm9200-ohci" },
	{ /* sentinel */ }
};

MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);

/*-------------------------------------------------------------------------*/



static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct at91_usbh_data	*pdata;
	int			i;
	int			ret;
	int			err;
	u32			ports;

	/* Right now device-tree probed devices don't get dma_mask set.
         * Since shared usb code relies on it, set it here for now.
         * Once we have dma capability bindings this can go away.
         */
	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;

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

	pdev->dev.platform_data = pdata;

	if (!of_property_read_u32(np, "num-ports", &ports))
		pdata->ports = ports;

	at91_for_each_port(i) {
		if (i >= pdata->ports)
			break;

		pdata->vbus_pin[i] =
			devm_gpiod_get_index_optional(&pdev->dev, "atmel,vbus",
						      i, GPIOD_OUT_HIGH);
		if (IS_ERR(pdata->vbus_pin[i])) {
			err = PTR_ERR(pdata->vbus_pin[i]);
			dev_err(&pdev->dev, "unable to claim gpio \"vbus\": %d\n", err);
			continue;
		}
	}

	at91_for_each_port(i) {
		if (i >= pdata->ports)
			break;

		pdata->overcurrent_pin[i] =
			devm_gpiod_get_index_optional(&pdev->dev, "atmel,oc",
						      i, GPIOD_IN);
		if (IS_ERR(pdata->overcurrent_pin[i])) {
			err = PTR_ERR(pdata->overcurrent_pin[i]);
			dev_err(&pdev->dev, "unable to claim gpio \"overcurrent\": %d\n", err);
			continue;
		}

		ret = devm_request_irq(&pdev->dev,
				       gpiod_to_irq(pdata->overcurrent_pin[i]),
				       ohci_hcd_at91_overcurrent_irq,
				       IRQF_SHARED,
				       "ohci_overcurrent", pdev);
		if (ret)
			dev_info(&pdev->dev, "failed to request gpio \"overcurrent\" IRQ\n");
	}

	device_init_wakeup(&pdev->dev, 1);
	return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jean-Christophe Plagniol-Villard
92
28.13%
2
11.76%
Nicolas Ferre
45
13.76%
3
17.65%
Wenyou Yang
40
12.23%
1
5.88%
Thomas Petazzoni
39
11.93%
1
5.88%
Alexandre Belloni
38
11.62%
3
17.65%
David Brownell
26
7.95%
2
11.76%
Peter Rosin
18
5.50%
1
5.88%
Russell King
13
3.98%
2
11.76%
Andrew Victor
9
2.75%
1
5.88%
Stephen Warren
7
2.14%
1
5.88%
Total
327
100.00%
17
100.00%



static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
{
	struct at91_usbh_data	*pdata = dev_get_platdata(&pdev->dev);
	int			i;

	if (pdata) {
		at91_for_each_port(i)
			ohci_at91_usb_set_power(pdata, i, 0);
	}

	device_init_wakeup(&pdev->dev, 0);
	usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
David Brownell
31
44.93%
2
25.00%
Andrew Victor
18
26.09%
1
12.50%
Thomas Petazzoni
9
13.04%
1
12.50%
Jingoo Han
4
5.80%
1
12.50%
Pete Zaitcev
3
4.35%
1
12.50%
Nicolas Ferre
2
2.90%
1
12.50%
Justin Waters
2
2.90%
1
12.50%
Total
69
100.00%
8
100.00%


static int __maybe_unused

ohci_hcd_at91_drv_suspend(struct device *dev)
{
	struct usb_hcd	*hcd = dev_get_drvdata(dev);
	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
	int		ret;

	/*
         * Disable wakeup if we are going to sleep with slow clock mode
         * enabled.
         */
	ohci_at91->wakeup = device_may_wakeup(dev)
			&& !at91_suspend_entering_slow_clock();

	if (ohci_at91->wakeup)
		enable_irq_wake(hcd->irq);

	ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1);

	ret = ohci_suspend(hcd, ohci_at91->wakeup);
	if (ret) {
		if (ohci_at91->wakeup)
			disable_irq_wake(hcd->irq);
		return ret;
	}
	/*
         * The integrated transceivers seem unable to notice disconnect,
         * reconnect, or wakeup without the 48 MHz clock active.  so for
         * correctness, always discard connection state (using reset).
         *
         * REVISIT: some boards will be able to turn VBUS off...
         */
	if (!ohci_at91->wakeup) {
		ohci->rh_state = OHCI_RH_HALTED;

		/* flush the writes */
		(void) ohci_readl (ohci, &ohci->regs->control);
		at91_stop_clock(ohci_at91);
	}

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sylvain Rochet
46
29.87%
3
27.27%
David Brownell
37
24.03%
1
9.09%
Majunath Goudar
27
17.53%
1
9.09%
Patrice Vilchez
16
10.39%
1
9.09%
Andrew Victor
12
7.79%
2
18.18%
Wenyou Yang
9
5.84%
1
9.09%
Manjunath Goudar
6
3.90%
1
9.09%
Arnd Bergmann
1
0.65%
1
9.09%
Total
154
100.00%
11
100.00%


static int __maybe_unused

ohci_hcd_at91_drv_resume(struct device *dev)
{
	struct usb_hcd	*hcd = dev_get_drvdata(dev);
	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);

	if (ohci_at91->wakeup)
		disable_irq_wake(hcd->irq);

	at91_start_clock(ohci_at91);

	ohci_resume(hcd, false);

	ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sylvain Rochet
20
28.99%
3
27.27%
Marc Pignat
18
26.09%
1
9.09%
Andrew Victor
13
18.84%
2
18.18%
Wenyou Yang
9
13.04%
1
9.09%
Alan Stern
4
5.80%
1
9.09%
Florian Fainelli
3
4.35%
1
9.09%
David Brownell
1
1.45%
1
9.09%
Arnd Bergmann
1
1.45%
1
9.09%
Total
69
100.00%
11
100.00%

static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend,
					ohci_hcd_at91_drv_resume);


static struct platform_driver ohci_hcd_at91_driver = {
	.probe		= ohci_hcd_at91_drv_probe,
	.remove		= ohci_hcd_at91_drv_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.name	= "at91_ohci",
		.pm	= &ohci_hcd_at91_pm_ops,
		.of_match_table	= at91_ohci_dt_ids,
        },
};



static int __init ohci_at91_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides);

	/*
         * The Atmel HW has some unusual quirks, which require Atmel-specific
         * workarounds. We override certain hc_driver functions here to
         * achieve that. We explicitly do not enhance ohci_driver_overrides to
         * allow this more easily, since this is an unusual case, and we don't
         * want to encourage others to override these functions by making it
         * too easy.
         */

	ohci_at91_hc_driver.hub_status_data	= ohci_at91_hub_status_data;
	ohci_at91_hc_driver.hub_control		= ohci_at91_hub_control;

	return platform_driver_register(&ohci_hcd_at91_driver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Manjunath Goudar
54
96.43%
1
50.00%
Sylvain Rochet
2
3.57%
1
50.00%
Total
56
100.00%
2
100.00%


module_init(ohci_at91_init);



static void __exit ohci_at91_cleanup(void)
{
	platform_driver_unregister(&ohci_hcd_at91_driver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Manjunath Goudar
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%


module_exit(ohci_at91_cleanup);


MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:at91_ohci");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Petazzoni
753
28.40%
1
1.79%
Andrew Victor
432
16.30%
2
3.57%
Wenyou Yang
313
11.81%
3
5.36%
Sylvain Rochet
223
8.41%
3
5.36%
Jean-Christophe Plagniol-Villard
204
7.70%
6
10.71%
Manjunath Goudar
174
6.56%
1
1.79%
Nicolas Ferre
111
4.19%
6
10.71%
David Brownell
107
4.04%
3
5.36%
Alexandre Belloni
77
2.90%
4
7.14%
Boris Brezillon
72
2.72%
6
10.71%
Majunath Goudar
27
1.02%
1
1.79%
Varka Bhadram
23
0.87%
1
1.79%
Marc Pignat
18
0.68%
1
1.79%
Peter Rosin
18
0.68%
1
1.79%
Patrice Vilchez
16
0.60%
1
1.79%
Russell King
13
0.49%
2
3.57%
Jingoo Han
11
0.41%
1
1.79%
Pete Zaitcev
10
0.38%
1
1.79%
Peter Chen
10
0.38%
1
1.79%
Jelle Martijn Kok
8
0.30%
1
1.79%
Stephen Warren
7
0.26%
1
1.79%
Arnd Bergmann
5
0.19%
2
3.57%
Aleksey Gorelov
5
0.19%
1
1.79%
Alan Stern
4
0.15%
1
1.79%
Florian Fainelli
3
0.11%
1
1.79%
Justin Waters
2
0.08%
1
1.79%
Laurent Pinchart
2
0.08%
1
1.79%
Sergei Shtylyov
2
0.08%
1
1.79%
Wei Yongjun
1
0.04%
1
1.79%
Total
2651
100.00%
56
100.00%
Directory: drivers/usb/host

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.