[net-next-2.6.git] / drivers / usb / host / uhci-hub.c

/*
 * Universal Host Controller Interface driver for USB.
 *
 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
 *
 * (C) Copyright 1999 Linus Torvalds
 * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
 * (C) Copyright 1999 Randy Dunlap
 * (C) Copyright 1999 Georg Acher, acher@in.tum.de
 * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
 * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
 * (C) Copyright 2004 Alan Stern, stern@rowland.harvard.edu
 */

static __u8 root_hub_hub_des[] =
{
	0x09,			/*  __u8  bLength; */
	0x29,			/*  __u8  bDescriptorType; Hub-descriptor */
	0x02,			/*  __u8  bNbrPorts; */
	0x0a,			/* __u16  wHubCharacteristics; */
	0x00,			/*   (per-port OC, no power switching) */
	0x01,			/*  __u8  bPwrOn2pwrGood; 2ms */
	0x00,			/*  __u8  bHubContrCurrent; 0 mA */
	0x00,			/*  __u8  DeviceRemovable; *** 7 Ports max *** */
	0xff			/*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
};

#define	UHCI_RH_MAXCHILD	7

/* must write as zeroes */
#define WZ_BITS		(USBPORTSC_RES2 | USBPORTSC_RES3 | USBPORTSC_RES4)

/* status change bits:  nonzero writes will clear */
#define RWC_BITS	(USBPORTSC_OCC | USBPORTSC_PEC | USBPORTSC_CSC)

/* A port that either is connected or has a changed-bit set will prevent
 * us from AUTO_STOPPING.
 */
static int any_ports_active(struct uhci_hcd *uhci)
{
	int port;

	for (port = 0; port < uhci->rh_numports; ++port) {
		if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) &
				(USBPORTSC_CCS | RWC_BITS)) ||
				test_bit(port, &uhci->port_c_suspend))
			return 1;
	}
	return 0;
}

static inline int get_hub_status_data(struct uhci_hcd *uhci, char *buf)
{
	int port;

	*buf = 0;
	for (port = 0; port < uhci->rh_numports; ++port) {
		if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) & RWC_BITS) ||
				test_bit(port, &uhci->port_c_suspend))
			*buf |= (1 << (port + 1));
	}
	return !!*buf;
}

#define OK(x)			len = (x); break

#define CLR_RH_PORTSTAT(x) \
	status = inw(port_addr); \
	status &= ~(RWC_BITS|WZ_BITS); \
	status &= ~(x); \
	status |= RWC_BITS & (x); \
	outw(status, port_addr)

#define SET_RH_PORTSTAT(x) \
	status = inw(port_addr); \
	status |= (x); \
	status &= ~(RWC_BITS|WZ_BITS); \
	outw(status, port_addr)

/* UHCI controllers don't automatically stop resume signalling after 20 msec,
 * so we have to poll and check timeouts in order to take care of it.
 */
static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
		unsigned long port_addr)
{
	int status;
	int i;

	if (inw(port_addr) & (USBPORTSC_SUSP | USBPORTSC_RD)) {
		CLR_RH_PORTSTAT(USBPORTSC_SUSP | USBPORTSC_RD);
		if (test_bit(port, &uhci->resuming_ports))
			set_bit(port, &uhci->port_c_suspend);

		/* The controller won't actually turn off the RD bit until
		 * it has had a chance to send a low-speed EOP sequence,
		 * which is supposed to take 3 bit times (= 2 microseconds).
		 * Experiments show that some controllers take longer, so
		 * we'll poll for completion. */
		for (i = 0; i < 10; ++i) {
			if (!(inw(port_addr) & USBPORTSC_RD))
				break;
			udelay(1);
		}
	}
	clear_bit(port, &uhci->resuming_ports);
}

/* Wait for the UHCI controller in HP's iLO2 server management chip.
 * It can take up to 250 us to finish a reset and set the CSC bit.
 */
static void wait_for_HP(unsigned long port_addr)
{
	int i;

	for (i = 10; i < 250; i += 10) {
		if (inw(port_addr) & USBPORTSC_CSC)
			return;
		udelay(10);
	}
	/* Log a warning? */
}

static void uhci_check_ports(struct uhci_hcd *uhci)
{
	unsigned int port;
	unsigned long port_addr;
	int status;

	for (port = 0; port < uhci->rh_numports; ++port) {
		port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
		status = inw(port_addr);
		if (unlikely(status & USBPORTSC_PR)) {
			if (time_after_eq(jiffies, uhci->ports_timeout)) {
				CLR_RH_PORTSTAT(USBPORTSC_PR);
				udelay(10);

				/* HP's server management chip requires
				 * a longer delay. */
				if (to_pci_dev(uhci_dev(uhci))->vendor ==
						PCI_VENDOR_ID_HP)
					wait_for_HP(port_addr);

				/* If the port was enabled before, turning
				 * reset on caused a port enable change.
				 * Turning reset off causes a port connect
				 * status change.  Clear these changes. */
				CLR_RH_PORTSTAT(USBPORTSC_CSC | USBPORTSC_PEC);
				SET_RH_PORTSTAT(USBPORTSC_PE);
			}
		}
		if (unlikely(status & USBPORTSC_RD)) {
			if (!test_bit(port, &uhci->resuming_ports)) {

				/* Port received a wakeup request */
				set_bit(port, &uhci->resuming_ports);
				uhci->ports_timeout = jiffies +
						msecs_to_jiffies(20);

				/* Make sure we see the port again
				 * after the resuming period is over. */
				mod_timer(&uhci_to_hcd(uhci)->rh_timer,
						uhci->ports_timeout);
			} else if (time_after_eq(jiffies,
						uhci->ports_timeout)) {
				uhci_finish_suspend(uhci, port, port_addr);
			}
		}
	}
}

static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
	unsigned long flags;
	int status = 0;

	spin_lock_irqsave(&uhci->lock, flags);

	uhci_scan_schedule(uhci);
	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead)
		goto done;
	uhci_check_ports(uhci);

	status = get_hub_status_data(uhci, buf);

	switch (uhci->rh_state) {
	    case UHCI_RH_SUSPENDING:
	    case UHCI_RH_SUSPENDED:
		/* if port change, ask to be resumed */
		if (status)
			usb_hcd_resume_root_hub(hcd);
		break;

	    case UHCI_RH_AUTO_STOPPED:
		/* if port change, auto start */
		if (status)
			wakeup_rh(uhci);
		break;

	    case UHCI_RH_RUNNING:
		/* are any devices attached? */
		if (!any_ports_active(uhci)) {
			uhci->rh_state = UHCI_RH_RUNNING_NODEVS;
			uhci->auto_stop_time = jiffies + HZ;
		}
		break;

	    case UHCI_RH_RUNNING_NODEVS:
		/* auto-stop if nothing connected for 1 second */
		if (any_ports_active(uhci))
			uhci->rh_state = UHCI_RH_RUNNING;
		else if (time_after_eq(jiffies, uhci->auto_stop_time))
			suspend_rh(uhci, UHCI_RH_AUTO_STOPPED);
		break;

	    default:
		break;
	}

done:
	spin_unlock_irqrestore(&uhci->lock, flags);
	return status;
}

/* size of returned buffer is part of USB spec */
static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
			u16 wIndex, char *buf, u16 wLength)
{
	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
	int status, lstatus, retval = 0, len = 0;
	unsigned int port = wIndex - 1;
	unsigned long port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
	u16 wPortChange, wPortStatus;
	unsigned long flags;

	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead)
		return -ETIMEDOUT;

	spin_lock_irqsave(&uhci->lock, flags);
	switch (typeReq) {

	case GetHubStatus:
		*(__le32 *)buf = cpu_to_le32(0);
		OK(4);		/* hub power */
	case GetPortStatus:
		if (port >= uhci->rh_numports)
			goto err;

		uhci_check_ports(uhci);
		status = inw(port_addr);

		/* Intel controllers report the OverCurrent bit active on.
		 * VIA controllers report it active off, so we'll adjust the
		 * bit value.  (It's not standardized in the UHCI spec.)
		 */
		if (to_pci_dev(hcd->self.controller)->vendor ==
				PCI_VENDOR_ID_VIA)
			status ^= USBPORTSC_OC;

		/* UHCI doesn't support C_RESET (always false) */
		wPortChange = lstatus = 0;
		if (status & USBPORTSC_CSC)
			wPortChange |= USB_PORT_STAT_C_CONNECTION;
		if (status & USBPORTSC_PEC)
			wPortChange |= USB_PORT_STAT_C_ENABLE;
		if (status & USBPORTSC_OCC)
			wPortChange |= USB_PORT_STAT_C_OVERCURRENT;

		if (test_bit(port, &uhci->port_c_suspend)) {
			wPortChange |= USB_PORT_STAT_C_SUSPEND;
			lstatus |= 1;
		}
		if (test_bit(port, &uhci->resuming_ports))
			lstatus |= 4;

		/* UHCI has no power switching (always on) */
		wPortStatus = USB_PORT_STAT_POWER;
		if (status & USBPORTSC_CCS)
			wPortStatus |= USB_PORT_STAT_CONNECTION;
		if (status & USBPORTSC_PE) {
			wPortStatus |= USB_PORT_STAT_ENABLE;
			if (status & (USBPORTSC_SUSP | USBPORTSC_RD))
				wPortStatus |= USB_PORT_STAT_SUSPEND;
		}
		if (status & USBPORTSC_OC)
			wPortStatus |= USB_PORT_STAT_OVERCURRENT;
		if (status & USBPORTSC_PR)
			wPortStatus |= USB_PORT_STAT_RESET;
		if (status & USBPORTSC_LSDA)
			wPortStatus |= USB_PORT_STAT_LOW_SPEED;

		if (wPortChange)
			dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n",
					wIndex, status, lstatus);

		*(__le16 *)buf = cpu_to_le16(wPortStatus);
		*(__le16 *)(buf + 2) = cpu_to_le16(wPortChange);
		OK(4);
	case SetHubFeature:		/* We don't implement these */
	case ClearHubFeature:
		switch (wValue) {
		case C_HUB_OVER_CURRENT:
		case C_HUB_LOCAL_POWER:
			OK(0);
		default:
			goto err;
		}
		break;
	case SetPortFeature:
		if (port >= uhci->rh_numports)
			goto err;

		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			SET_RH_PORTSTAT(USBPORTSC_SUSP);
			OK(0);
		case USB_PORT_FEAT_RESET:
			SET_RH_PORTSTAT(USBPORTSC_PR);

			/* Reset terminates Resume signalling */
			uhci_finish_suspend(uhci, port, port_addr);

			/* USB v2.0 7.1.7.5 */
			uhci->ports_timeout = jiffies + msecs_to_jiffies(50);
			OK(0);
		case USB_PORT_FEAT_POWER:
			/* UHCI has no power switching */
			OK(0);
		default:
			goto err;
		}
		break;
	case ClearPortFeature:
		if (port >= uhci->rh_numports)
			goto err;

		switch (wValue) {
		case USB_PORT_FEAT_ENABLE:
			CLR_RH_PORTSTAT(USBPORTSC_PE);

			/* Disable terminates Resume signalling */
			uhci_finish_suspend(uhci, port, port_addr);
			OK(0);
		case USB_PORT_FEAT_C_ENABLE:
			CLR_RH_PORTSTAT(USBPORTSC_PEC);
			OK(0);
		case USB_PORT_FEAT_SUSPEND:
			if (!(inw(port_addr) & USBPORTSC_SUSP)) {

				/* Make certain the port isn't suspended */
				uhci_finish_suspend(uhci, port, port_addr);
			} else if (!test_and_set_bit(port,
						&uhci->resuming_ports)) {
				SET_RH_PORTSTAT(USBPORTSC_RD);

				/* The controller won't allow RD to be set
				 * if the port is disabled.  When this happens
				 * just skip the Resume signalling.
				 */
				if (!(inw(port_addr) & USBPORTSC_RD))
					uhci_finish_suspend(uhci, port,
							port_addr);
				else
					/* USB v2.0 7.1.7.7 */
					uhci->ports_timeout = jiffies +
						msecs_to_jiffies(20);
			}
			OK(0);
		case USB_PORT_FEAT_C_SUSPEND:
			clear_bit(port, &uhci->port_c_suspend);
			OK(0);
		case USB_PORT_FEAT_POWER:
			/* UHCI has no power switching */
			goto err;
		case USB_PORT_FEAT_C_CONNECTION:
			CLR_RH_PORTSTAT(USBPORTSC_CSC);
			OK(0);
		case USB_PORT_FEAT_C_OVER_CURRENT:
			CLR_RH_PORTSTAT(USBPORTSC_OCC);
			OK(0);
		case USB_PORT_FEAT_C_RESET:
			/* this driver won't report these */
			OK(0);
		default:
			goto err;
		}
		break;
	case GetHubDescriptor:
		len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
		memcpy(buf, root_hub_hub_des, len);
		if (len > 2)
			buf[2] = uhci->rh_numports;
		OK(len);
	default:
err:
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&uhci->lock, flags);

	return retval;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Universal Host Controller Interface driver for USB.
	3	*
	4	* Maintainer: Alan Stern <stern@rowland.harvard.edu>
	5	*
	6	* (C) Copyright 1999 Linus Torvalds
	7	* (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
	8	* (C) Copyright 1999 Randy Dunlap
	9	* (C) Copyright 1999 Georg Acher, acher@in.tum.de
	10	* (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
	11	* (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
	12	* (C) Copyright 2004 Alan Stern, stern@rowland.harvard.edu
	13	*/
	14
	15	static __u8 root_hub_hub_des[] =
	16	{
	17	0x09, /* __u8 bLength; */
	18	0x29, /* __u8 bDescriptorType; Hub-descriptor */
	19	0x02, /* __u8 bNbrPorts; */
	20	0x0a, /* __u16 wHubCharacteristics; */
	21	0x00, /* (per-port OC, no power switching) */
	22	0x01, /* __u8 bPwrOn2pwrGood; 2ms */
	23	0x00, /* __u8 bHubContrCurrent; 0 mA */
	24	0x00, /* __u8 DeviceRemovable; * 7 Ports max * */
	25	0xff /* __u8 PortPwrCtrlMask; * 7 ports max * */
	26	};
	27
	28	#define UHCI_RH_MAXCHILD 7
	29
	30	/* must write as zeroes */
	31	#define WZ_BITS (USBPORTSC_RES2 \| USBPORTSC_RES3 \| USBPORTSC_RES4)
	32
	33	/* status change bits: nonzero writes will clear */
	34	#define RWC_BITS (USBPORTSC_OCC \| USBPORTSC_PEC \| USBPORTSC_CSC)
	35
f5946f82 AS	36	/* A port that either is connected or has a changed-bit set will prevent
	37	* us from AUTO_STOPPING.
	38	*/
	39	static int any_ports_active(struct uhci_hcd *uhci)
	40	{
	41	int port;
	42
	43	for (port = 0; port < uhci->rh_numports; ++port) {
	44	if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) &
	45	(USBPORTSC_CCS \| RWC_BITS)) \|\|
	46	test_bit(port, &uhci->port_c_suspend))
	47	return 1;
	48	}
	49	return 0;
	50	}
	51
6c1b445c	52	static inline int get_hub_status_data(struct uhci_hcd uhci, char buf)
1da177e4	53	{
1da177e4 LT	54	int port;
	55
	56	*buf = 0;
	57	for (port = 0; port < uhci->rh_numports; ++port) {
	58	if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) & RWC_BITS) \|\|
	59	test_bit(port, &uhci->port_c_suspend))
	60	*buf \|= (1 << (port + 1));
	61	}
1da177e4 LT	62	return !!*buf;
	63	}
	64
	65	#define OK(x) len = (x); break
	66
	67	#define CLR_RH_PORTSTAT(x) \
	68	status = inw(port_addr); \
	69	status &= ~(RWC_BITS\|WZ_BITS); \
	70	status &= ~(x); \
	71	status \|= RWC_BITS & (x); \
	72	outw(status, port_addr)
	73
	74	#define SET_RH_PORTSTAT(x) \
	75	status = inw(port_addr); \
	76	status \|= (x); \
	77	status &= ~(RWC_BITS\|WZ_BITS); \
	78	outw(status, port_addr)
	79
	80	/* UHCI controllers don't automatically stop resume signalling after 20 msec,
	81	* so we have to poll and check timeouts in order to take care of it.
	82	*/
	83	static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
	84	unsigned long port_addr)
	85	{
	86	int status;
de06a3b8	87	int i;
1da177e4	88
8e326406	89	if (inw(port_addr) & (USBPORTSC_SUSP \| USBPORTSC_RD)) {
1da177e4	90	CLR_RH_PORTSTAT(USBPORTSC_SUSP \| USBPORTSC_RD);
8e326406 AS	91	if (test_bit(port, &uhci->resuming_ports))
8e326406 AS	92	set_bit(port, &uhci->port_c_suspend);
1da177e4 LT	93
	94	/* The controller won't actually turn off the RD bit until
	95	* it has had a chance to send a low-speed EOP sequence,
de06a3b8 AS	96	* which is supposed to take 3 bit times (= 2 microseconds).
	97	* Experiments show that some controllers take longer, so
	98	* we'll poll for completion. */
	99	for (i = 0; i < 10; ++i) {
	100	if (!(inw(port_addr) & USBPORTSC_RD))
	101	break;
	102	udelay(1);
	103	}
1da177e4	104	}
8e326406	105	clear_bit(port, &uhci->resuming_ports);
1da177e4 LT	106	}
1da177e4 LT	107
ae557175 AS	108	/* Wait for the UHCI controller in HP's iLO2 server management chip.
	109	* It can take up to 250 us to finish a reset and set the CSC bit.
	110	*/
	111	static void wait_for_HP(unsigned long port_addr)
	112	{
	113	int i;
	114
	115	for (i = 10; i < 250; i += 10) {
	116	if (inw(port_addr) & USBPORTSC_CSC)
	117	return;
	118	udelay(10);
	119	}
	120	/* Log a warning? */
	121	}
	122
1da177e4 LT	123	static void uhci_check_ports(struct uhci_hcd *uhci)
	124	{
	125	unsigned int port;
	126	unsigned long port_addr;
	127	int status;
	128
	129	for (port = 0; port < uhci->rh_numports; ++port) {
	130	port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
	131	status = inw(port_addr);
	132	if (unlikely(status & USBPORTSC_PR)) {
	133	if (time_after_eq(jiffies, uhci->ports_timeout)) {
	134	CLR_RH_PORTSTAT(USBPORTSC_PR);
	135	udelay(10);
	136
ae557175 AS	137	/* HP's server management chip requires
	138	* a longer delay. */
	139	if (to_pci_dev(uhci_dev(uhci))->vendor ==
	140	PCI_VENDOR_ID_HP)
	141	wait_for_HP(port_addr);
	142
1da177e4 LT	143	/* If the port was enabled before, turning
	144	* reset on caused a port enable change.
	145	* Turning reset off causes a port connect
	146	* status change. Clear these changes. */
	147	CLR_RH_PORTSTAT(USBPORTSC_CSC \| USBPORTSC_PEC);
	148	SET_RH_PORTSTAT(USBPORTSC_PE);
	149	}
	150	}
	151	if (unlikely(status & USBPORTSC_RD)) {
	152	if (!test_bit(port, &uhci->resuming_ports)) {
	153
	154	/* Port received a wakeup request */
	155	set_bit(port, &uhci->resuming_ports);
	156	uhci->ports_timeout = jiffies +
	157	msecs_to_jiffies(20);
6c1b445c AS	158
	159	/* Make sure we see the port again
	160	* after the resuming period is over. */
	161	mod_timer(&uhci_to_hcd(uhci)->rh_timer,
	162	uhci->ports_timeout);
1da177e4 LT	163	} else if (time_after_eq(jiffies,
	164	uhci->ports_timeout)) {
	165	uhci_finish_suspend(uhci, port, port_addr);
	166	}
	167	}
	168	}
	169	}
	170
6c1b445c AS	171	static int uhci_hub_status_data(struct usb_hcd hcd, char buf)
	172	{
	173	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
	174	unsigned long flags;
1f09df8b	175	int status = 0;
6c1b445c AS	176
6c1b445c AS	177	spin_lock_irqsave(&uhci->lock, flags);
6c1b445c	178
7d12e780	179	uhci_scan_schedule(uhci);
e323de46	180	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) \|\| uhci->dead)
1f09df8b	181	goto done;
6c1b445c	182	uhci_check_ports(uhci);
1f09df8b	183
6c1b445c AS	184	status = get_hub_status_data(uhci, buf);
	185
	186	switch (uhci->rh_state) {
	187	case UHCI_RH_SUSPENDING:
	188	case UHCI_RH_SUSPENDED:
	189	/* if port change, ask to be resumed */
	190	if (status)
	191	usb_hcd_resume_root_hub(hcd);
	192	break;
	193
	194	case UHCI_RH_AUTO_STOPPED:
	195	/* if port change, auto start */
	196	if (status)
	197	wakeup_rh(uhci);
	198	break;
	199
	200	case UHCI_RH_RUNNING:
	201	/* are any devices attached? */
	202	if (!any_ports_active(uhci)) {
	203	uhci->rh_state = UHCI_RH_RUNNING_NODEVS;
	204	uhci->auto_stop_time = jiffies + HZ;
	205	}
	206	break;
	207
	208	case UHCI_RH_RUNNING_NODEVS:
	209	/* auto-stop if nothing connected for 1 second */
	210	if (any_ports_active(uhci))
	211	uhci->rh_state = UHCI_RH_RUNNING;
	212	else if (time_after_eq(jiffies, uhci->auto_stop_time))
	213	suspend_rh(uhci, UHCI_RH_AUTO_STOPPED);
	214	break;
	215
	216	default:
	217	break;
	218	}
	219
	220	done:
	221	spin_unlock_irqrestore(&uhci->lock, flags);
	222	return status;
	223	}
	224
1da177e4 LT	225	/* size of returned buffer is part of USB spec */
	226	static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
	227	u16 wIndex, char *buf, u16 wLength)
	228	{
	229	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
	230	int status, lstatus, retval = 0, len = 0;
	231	unsigned int port = wIndex - 1;
	232	unsigned long port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
	233	u16 wPortChange, wPortStatus;
	234	unsigned long flags;
	235
e323de46	236	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) \|\| uhci->dead)
a8bed8b6 AS	237	return -ETIMEDOUT;
a8bed8b6 AS	238
1da177e4 LT	239	spin_lock_irqsave(&uhci->lock, flags);
	240	switch (typeReq) {
	241
	242	case GetHubStatus:
	243	(__le32 )buf = cpu_to_le32(0);
	244	OK(4); /* hub power */
	245	case GetPortStatus:
	246	if (port >= uhci->rh_numports)
	247	goto err;
	248
	249	uhci_check_ports(uhci);
	250	status = inw(port_addr);
	251
	252	/* Intel controllers report the OverCurrent bit active on.
	253	* VIA controllers report it active off, so we'll adjust the
	254	* bit value. (It's not standardized in the UHCI spec.)
	255	*/
	256	if (to_pci_dev(hcd->self.controller)->vendor ==
	257	PCI_VENDOR_ID_VIA)
	258	status ^= USBPORTSC_OC;
	259
	260	/* UHCI doesn't support C_RESET (always false) */
	261	wPortChange = lstatus = 0;
	262	if (status & USBPORTSC_CSC)
	263	wPortChange \|= USB_PORT_STAT_C_CONNECTION;
	264	if (status & USBPORTSC_PEC)
	265	wPortChange \|= USB_PORT_STAT_C_ENABLE;
	266	if (status & USBPORTSC_OCC)
	267	wPortChange \|= USB_PORT_STAT_C_OVERCURRENT;
	268
	269	if (test_bit(port, &uhci->port_c_suspend)) {
	270	wPortChange \|= USB_PORT_STAT_C_SUSPEND;
	271	lstatus \|= 1;
	272	}
1da177e4 LT	273	if (test_bit(port, &uhci->resuming_ports))
	274	lstatus \|= 4;
	275
	276	/* UHCI has no power switching (always on) */
	277	wPortStatus = USB_PORT_STAT_POWER;
	278	if (status & USBPORTSC_CCS)
	279	wPortStatus \|= USB_PORT_STAT_CONNECTION;
	280	if (status & USBPORTSC_PE) {
	281	wPortStatus \|= USB_PORT_STAT_ENABLE;
	282	if (status & (USBPORTSC_SUSP \| USBPORTSC_RD))
	283	wPortStatus \|= USB_PORT_STAT_SUSPEND;
	284	}
	285	if (status & USBPORTSC_OC)
	286	wPortStatus \|= USB_PORT_STAT_OVERCURRENT;
	287	if (status & USBPORTSC_PR)
	288	wPortStatus \|= USB_PORT_STAT_RESET;
	289	if (status & USBPORTSC_LSDA)
	290	wPortStatus \|= USB_PORT_STAT_LOW_SPEED;
	291
	292	if (wPortChange)
	293	dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n",
	294	wIndex, status, lstatus);
	295
	296	(__le16 )buf = cpu_to_le16(wPortStatus);
	297	(__le16 )(buf + 2) = cpu_to_le16(wPortChange);
	298	OK(4);
	299	case SetHubFeature: /* We don't implement these */
	300	case ClearHubFeature:
	301	switch (wValue) {
	302	case C_HUB_OVER_CURRENT:
	303	case C_HUB_LOCAL_POWER:
	304	OK(0);
	305	default:
	306	goto err;
	307	}
	308	break;
	309	case SetPortFeature:
	310	if (port >= uhci->rh_numports)
	311	goto err;
	312
	313	switch (wValue) {
	314	case USB_PORT_FEAT_SUSPEND:
1da177e4 LT	315	SET_RH_PORTSTAT(USBPORTSC_SUSP);
	316	OK(0);
	317	case USB_PORT_FEAT_RESET:
	318	SET_RH_PORTSTAT(USBPORTSC_PR);
	319
	320	/* Reset terminates Resume signalling */
	321	uhci_finish_suspend(uhci, port, port_addr);
	322
	323	/* USB v2.0 7.1.7.5 */
	324	uhci->ports_timeout = jiffies + msecs_to_jiffies(50);
	325	OK(0);
	326	case USB_PORT_FEAT_POWER:
	327	/* UHCI has no power switching */
	328	OK(0);
	329	default:
	330	goto err;
	331	}
	332	break;
	333	case ClearPortFeature:
	334	if (port >= uhci->rh_numports)
	335	goto err;
	336
	337	switch (wValue) {
	338	case USB_PORT_FEAT_ENABLE:
	339	CLR_RH_PORTSTAT(USBPORTSC_PE);
	340
	341	/* Disable terminates Resume signalling */
	342	uhci_finish_suspend(uhci, port, port_addr);
	343	OK(0);
	344	case USB_PORT_FEAT_C_ENABLE:
	345	CLR_RH_PORTSTAT(USBPORTSC_PEC);
	346	OK(0);
	347	case USB_PORT_FEAT_SUSPEND:
8e326406 AS	348	if (!(inw(port_addr) & USBPORTSC_SUSP)) {
	349
	350	/* Make certain the port isn't suspended */
	351	uhci_finish_suspend(uhci, port, port_addr);
	352	} else if (!test_and_set_bit(port,
1da177e4 LT	353	&uhci->resuming_ports)) {
	354	SET_RH_PORTSTAT(USBPORTSC_RD);
	355
	356	/* The controller won't allow RD to be set
	357	* if the port is disabled. When this happens
	358	* just skip the Resume signalling.
	359	*/
	360	if (!(inw(port_addr) & USBPORTSC_RD))
	361	uhci_finish_suspend(uhci, port,
	362	port_addr);
	363	else
	364	/* USB v2.0 7.1.7.7 */
	365	uhci->ports_timeout = jiffies +
	366	msecs_to_jiffies(20);
	367	}
	368	OK(0);
	369	case USB_PORT_FEAT_C_SUSPEND:
	370	clear_bit(port, &uhci->port_c_suspend);
	371	OK(0);
	372	case USB_PORT_FEAT_POWER:
	373	/* UHCI has no power switching */
	374	goto err;
	375	case USB_PORT_FEAT_C_CONNECTION:
	376	CLR_RH_PORTSTAT(USBPORTSC_CSC);
	377	OK(0);
	378	case USB_PORT_FEAT_C_OVER_CURRENT:
	379	CLR_RH_PORTSTAT(USBPORTSC_OCC);
	380	OK(0);
	381	case USB_PORT_FEAT_C_RESET:
	382	/* this driver won't report these */
	383	OK(0);
	384	default:
	385	goto err;
	386	}
	387	break;
	388	case GetHubDescriptor:
	389	len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
	390	memcpy(buf, root_hub_hub_des, len);
	391	if (len > 2)
	392	buf[2] = uhci->rh_numports;
	393	OK(len);
	394	default:
	395	err:
	396	retval = -EPIPE;
	397	}
	398	spin_unlock_irqrestore(&uhci->lock, flags);
	399
	400	return retval;
	401	}