[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / musb / musb_virthub.c

/*
 * MUSB OTG driver virtual root hub support
 *
 * Copyright 2005 Mentor Graphics Corporation
 * Copyright (C) 2005-2006 by Texas Instruments
 * Copyright (C) 2006-2007 Nokia Corporation
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/time.h>
#include <linux/timer.h>

#include <asm/unaligned.h>

#include "musb_core.h"


static void musb_port_suspend(struct musb *musb, bool do_suspend)
{
	u8		power;
	void __iomem	*mbase = musb->mregs;

	if (!is_host_active(musb))
		return;

	/* NOTE:  this doesn't necessarily put PHY into low power mode,
	 * turning off its clock; that's a function of PHY integration and
	 * MUSB_POWER_ENSUSPEND.  PHY may need a clock (sigh) to detect
	 * SE0 changing to connect (J) or wakeup (K) states.
	 */
	power = musb_readb(mbase, MUSB_POWER);
	if (do_suspend) {
		int retries = 10000;

		power &= ~MUSB_POWER_RESUME;
		power |= MUSB_POWER_SUSPENDM;
		musb_writeb(mbase, MUSB_POWER, power);

		/* Needed for OPT A tests */
		power = musb_readb(mbase, MUSB_POWER);
		while (power & MUSB_POWER_SUSPENDM) {
			power = musb_readb(mbase, MUSB_POWER);
			if (retries-- < 1)
				break;
		}

		DBG(3, "Root port suspended, power %02x\n", power);

		musb->port1_status |= USB_PORT_STAT_SUSPEND;
		switch (musb->xceiv->state) {
		case OTG_STATE_A_HOST:
			musb->xceiv->state = OTG_STATE_A_SUSPEND;
			musb->is_active = is_otg_enabled(musb)
					&& musb->xceiv->host->b_hnp_enable;
			if (musb->is_active)
				mod_timer(&musb->otg_timer, jiffies
					+ msecs_to_jiffies(
						OTG_TIME_A_AIDL_BDIS));
			musb_platform_try_idle(musb, 0);
			break;
#ifdef	CONFIG_USB_MUSB_OTG
		case OTG_STATE_B_HOST:
			musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
			musb->is_active = is_otg_enabled(musb)
					&& musb->xceiv->host->b_hnp_enable;
			musb_platform_try_idle(musb, 0);
			break;
#endif
		default:
			DBG(1, "bogus rh suspend? %s\n",
				otg_state_string(musb));
		}
	} else if (power & MUSB_POWER_SUSPENDM) {
		power &= ~MUSB_POWER_SUSPENDM;
		power |= MUSB_POWER_RESUME;
		musb_writeb(mbase, MUSB_POWER, power);

		DBG(3, "Root port resuming, power %02x\n", power);

		/* later, GetPortStatus will stop RESUME signaling */
		musb->port1_status |= MUSB_PORT_STAT_RESUME;
		musb->rh_timer = jiffies + msecs_to_jiffies(20);
	}
}

static void musb_port_reset(struct musb *musb, bool do_reset)
{
	u8		power;
	void __iomem	*mbase = musb->mregs;

#ifdef CONFIG_USB_MUSB_OTG
	if (musb->xceiv->state == OTG_STATE_B_IDLE) {
		DBG(2, "HNP: Returning from HNP; no hub reset from b_idle\n");
		musb->port1_status &= ~USB_PORT_STAT_RESET;
		return;
	}
#endif

	if (!is_host_active(musb))
		return;

	/* NOTE:  caller guarantees it will turn off the reset when
	 * the appropriate amount of time has passed
	 */
	power = musb_readb(mbase, MUSB_POWER);
	if (do_reset) {

		/*
		 * If RESUME is set, we must make sure it stays minimum 20 ms.
		 * Then we must clear RESUME and wait a bit to let musb start
		 * generating SOFs. If we don't do this, OPT HS A 6.8 tests
		 * fail with "Error! Did not receive an SOF before suspend
		 * detected".
		 */
		if (power &  MUSB_POWER_RESUME) {
			while (time_before(jiffies, musb->rh_timer))
				msleep(1);
			musb_writeb(mbase, MUSB_POWER,
				power & ~MUSB_POWER_RESUME);
			msleep(1);
		}

		musb->ignore_disconnect = true;
		power &= 0xf0;
		musb_writeb(mbase, MUSB_POWER,
				power | MUSB_POWER_RESET);

		musb->port1_status |= USB_PORT_STAT_RESET;
		musb->port1_status &= ~USB_PORT_STAT_ENABLE;
		musb->rh_timer = jiffies + msecs_to_jiffies(50);
	} else {
		DBG(4, "root port reset stopped\n");
		musb_writeb(mbase, MUSB_POWER,
				power & ~MUSB_POWER_RESET);

		musb->ignore_disconnect = false;

		power = musb_readb(mbase, MUSB_POWER);
		if (power & MUSB_POWER_HSMODE) {
			DBG(4, "high-speed device connected\n");
			musb->port1_status |= USB_PORT_STAT_HIGH_SPEED;
		}

		musb->port1_status &= ~USB_PORT_STAT_RESET;
		musb->port1_status |= USB_PORT_STAT_ENABLE
					| (USB_PORT_STAT_C_RESET << 16)
					| (USB_PORT_STAT_C_ENABLE << 16);
		usb_hcd_poll_rh_status(musb_to_hcd(musb));

		musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
	}
}

void musb_root_disconnect(struct musb *musb)
{
	musb->port1_status = (1 << USB_PORT_FEAT_POWER)
			| (1 << USB_PORT_FEAT_C_CONNECTION);

	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	musb->is_active = 0;

	switch (musb->xceiv->state) {
	case OTG_STATE_A_SUSPEND:
#ifdef	CONFIG_USB_MUSB_OTG
		if (is_otg_enabled(musb)
				&& musb->xceiv->host->b_hnp_enable) {
			musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
			musb->g.is_a_peripheral = 1;
			break;
		}
#endif
		/* FALLTHROUGH */
	case OTG_STATE_A_HOST:
		musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
		musb->is_active = 0;
		break;
	case OTG_STATE_A_WAIT_VFALL:
		musb->xceiv->state = OTG_STATE_B_IDLE;
		break;
	default:
		DBG(1, "host disconnect (%s)\n", otg_state_string(musb));
	}
}


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

/* Caller may or may not hold musb->lock */
int musb_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct musb	*musb = hcd_to_musb(hcd);
	int		retval = 0;

	/* called in_irq() via usb_hcd_poll_rh_status() */
	if (musb->port1_status & 0xffff0000) {
		*buf = 0x02;
		retval = 1;
	}
	return retval;
}

int musb_hub_control(
	struct usb_hcd	*hcd,
	u16		typeReq,
	u16		wValue,
	u16		wIndex,
	char		*buf,
	u16		wLength)
{
	struct musb	*musb = hcd_to_musb(hcd);
	u32		temp;
	int		retval = 0;
	unsigned long	flags;

	spin_lock_irqsave(&musb->lock, flags);

	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
		spin_unlock_irqrestore(&musb->lock, flags);
		return -ESHUTDOWN;
	}

	/* hub features:  always zero, setting is a NOP
	 * port features: reported, sometimes updated when host is active
	 * no indicators
	 */
	switch (typeReq) {
	case ClearHubFeature:
	case SetHubFeature:
		switch (wValue) {
		case C_HUB_OVER_CURRENT:
		case C_HUB_LOCAL_POWER:
			break;
		default:
			goto error;
		}
		break;
	case ClearPortFeature:
		if ((wIndex & 0xff) != 1)
			goto error;

		switch (wValue) {
		case USB_PORT_FEAT_ENABLE:
			break;
		case USB_PORT_FEAT_SUSPEND:
			musb_port_suspend(musb, false);
			break;
		case USB_PORT_FEAT_POWER:
			if (!(is_otg_enabled(musb) && hcd->self.is_b_host))
				musb_set_vbus(musb, 0);
			break;
		case USB_PORT_FEAT_C_CONNECTION:
		case USB_PORT_FEAT_C_ENABLE:
		case USB_PORT_FEAT_C_OVER_CURRENT:
		case USB_PORT_FEAT_C_RESET:
		case USB_PORT_FEAT_C_SUSPEND:
			break;
		default:
			goto error;
		}
		DBG(5, "clear feature %d\n", wValue);
		musb->port1_status &= ~(1 << wValue);
		break;
	case GetHubDescriptor:
		{
		struct usb_hub_descriptor *desc = (void *)buf;

		desc->bDescLength = 9;
		desc->bDescriptorType = 0x29;
		desc->bNbrPorts = 1;
		desc->wHubCharacteristics = cpu_to_le16(
				  0x0001	/* per-port power switching */
				| 0x0010	/* no overcurrent reporting */
				);
		desc->bPwrOn2PwrGood = 5;	/* msec/2 */
		desc->bHubContrCurrent = 0;

		/* workaround bogus struct definition */
		desc->DeviceRemovable[0] = 0x02;	/* port 1 */
		desc->DeviceRemovable[1] = 0xff;
		}
		break;
	case GetHubStatus:
		temp = 0;
		*(__le32 *) buf = cpu_to_le32(temp);
		break;
	case GetPortStatus:
		if (wIndex != 1)
			goto error;

		/* finish RESET signaling? */
		if ((musb->port1_status & USB_PORT_STAT_RESET)
				&& time_after_eq(jiffies, musb->rh_timer))
			musb_port_reset(musb, false);

		/* finish RESUME signaling? */
		if ((musb->port1_status & MUSB_PORT_STAT_RESUME)
				&& time_after_eq(jiffies, musb->rh_timer)) {
			u8		power;

			power = musb_readb(musb->mregs, MUSB_POWER);
			power &= ~MUSB_POWER_RESUME;
			DBG(4, "root port resume stopped, power %02x\n",
					power);
			musb_writeb(musb->mregs, MUSB_POWER, power);

			/* ISSUE:  DaVinci (RTL 1.300) disconnects after
			 * resume of high speed peripherals (but not full
			 * speed ones).
			 */

			musb->is_active = 1;
			musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
					| MUSB_PORT_STAT_RESUME);
			musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
			usb_hcd_poll_rh_status(musb_to_hcd(musb));
			/* NOTE: it might really be A_WAIT_BCON ... */
			musb->xceiv->state = OTG_STATE_A_HOST;
		}

		put_unaligned(cpu_to_le32(musb->port1_status
					& ~MUSB_PORT_STAT_RESUME),
				(__le32 *) buf);

		/* port change status is more interesting */
		DBG(get_unaligned((u16 *)(buf+2)) ? 2 : 5, "port status %08x\n",
				musb->port1_status);
		break;
	case SetPortFeature:
		if ((wIndex & 0xff) != 1)
			goto error;

		switch (wValue) {
		case USB_PORT_FEAT_POWER:
			/* NOTE: this controller has a strange state machine
			 * that involves "requesting sessions" according to
			 * magic side effects from incompletely-described
			 * rules about startup...
			 *
			 * This call is what really starts the host mode; be
			 * very careful about side effects if you reorder any
			 * initialization logic, e.g. for OTG, or change any
			 * logic relating to VBUS power-up.
			 */
			if (!(is_otg_enabled(musb) && hcd->self.is_b_host))
				musb_start(musb);
			break;
		case USB_PORT_FEAT_RESET:
			musb_port_reset(musb, true);
			break;
		case USB_PORT_FEAT_SUSPEND:
			musb_port_suspend(musb, true);
			break;
		case USB_PORT_FEAT_TEST:
			if (unlikely(is_host_active(musb)))
				goto error;

			wIndex >>= 8;
			switch (wIndex) {
			case 1:
				pr_debug("TEST_J\n");
				temp = MUSB_TEST_J;
				break;
			case 2:
				pr_debug("TEST_K\n");
				temp = MUSB_TEST_K;
				break;
			case 3:
				pr_debug("TEST_SE0_NAK\n");
				temp = MUSB_TEST_SE0_NAK;
				break;
			case 4:
				pr_debug("TEST_PACKET\n");
				temp = MUSB_TEST_PACKET;
				musb_load_testpacket(musb);
				break;
			case 5:
				pr_debug("TEST_FORCE_ENABLE\n");
				temp = MUSB_TEST_FORCE_HOST
					| MUSB_TEST_FORCE_HS;

				musb_writeb(musb->mregs, MUSB_DEVCTL,
						MUSB_DEVCTL_SESSION);
				break;
			case 6:
				pr_debug("TEST_FIFO_ACCESS\n");
				temp = MUSB_TEST_FIFO_ACCESS;
				break;
			default:
				goto error;
			}
			musb_writeb(musb->mregs, MUSB_TESTMODE, temp);
			break;
		default:
			goto error;
		}
		DBG(5, "set feature %d\n", wValue);
		musb->port1_status |= 1 << wValue;
		break;

	default:
error:
		/* "protocol stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&musb->lock, flags);
	return retval;
}
Commit	Line	Data
550a7375 FB	1	/*
	2	* MUSB OTG driver virtual root hub support
	3	*
	4	* Copyright 2005 Mentor Graphics Corporation
	5	* Copyright (C) 2005-2006 by Texas Instruments
	6	* Copyright (C) 2006-2007 Nokia Corporation
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*
	22	* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
	23	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	24	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	25	* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	26	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	27	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	28	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	29	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	30	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	31	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	32	*
	33	*/
	34
	35	#include <linux/module.h>
	36	#include <linux/kernel.h>
	37	#include <linux/sched.h>
550a7375 FB	38	#include <linux/errno.h>
	39	#include <linux/init.h>
	40	#include <linux/time.h>
	41	#include <linux/timer.h>
	42
	43	#include <asm/unaligned.h>
	44
	45	#include "musb_core.h"
	46
	47
	48	static void musb_port_suspend(struct musb *musb, bool do_suspend)
	49	{
	50	u8 power;
	51	void __iomem *mbase = musb->mregs;
	52
	53	if (!is_host_active(musb))
	54	return;
	55
	56	/* NOTE: this doesn't necessarily put PHY into low power mode,
	57	* turning off its clock; that's a function of PHY integration and
	58	* MUSB_POWER_ENSUSPEND. PHY may need a clock (sigh) to detect
	59	* SE0 changing to connect (J) or wakeup (K) states.
	60	*/
	61	power = musb_readb(mbase, MUSB_POWER);
	62	if (do_suspend) {
	63	int retries = 10000;
	64
	65	power &= ~MUSB_POWER_RESUME;
	66	power \|= MUSB_POWER_SUSPENDM;
	67	musb_writeb(mbase, MUSB_POWER, power);
	68
	69	/* Needed for OPT A tests */
	70	power = musb_readb(mbase, MUSB_POWER);
	71	while (power & MUSB_POWER_SUSPENDM) {
	72	power = musb_readb(mbase, MUSB_POWER);
	73	if (retries-- < 1)
	74	break;
	75	}
	76
	77	DBG(3, "Root port suspended, power %02x\n", power);
	78
	79	musb->port1_status \|= USB_PORT_STAT_SUSPEND;
84e250ff	80	switch (musb->xceiv->state) {
550a7375	81	case OTG_STATE_A_HOST:
84e250ff	82	musb->xceiv->state = OTG_STATE_A_SUSPEND;
550a7375	83	musb->is_active = is_otg_enabled(musb)
84e250ff	84	&& musb->xceiv->host->b_hnp_enable;
ab983f2a DB	85	if (musb->is_active)
	86	mod_timer(&musb->otg_timer, jiffies
	87	+ msecs_to_jiffies(
	88	OTG_TIME_A_AIDL_BDIS));
550a7375 FB	89	musb_platform_try_idle(musb, 0);
	90	break;
	91	#ifdef CONFIG_USB_MUSB_OTG
	92	case OTG_STATE_B_HOST:
84e250ff	93	musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
550a7375	94	musb->is_active = is_otg_enabled(musb)
84e250ff	95	&& musb->xceiv->host->b_hnp_enable;
550a7375 FB	96	musb_platform_try_idle(musb, 0);
	97	break;
	98	#endif
	99	default:
	100	DBG(1, "bogus rh suspend? %s\n",
	101	otg_state_string(musb));
	102	}
	103	} else if (power & MUSB_POWER_SUSPENDM) {
	104	power &= ~MUSB_POWER_SUSPENDM;
	105	power \|= MUSB_POWER_RESUME;
	106	musb_writeb(mbase, MUSB_POWER, power);
	107
	108	DBG(3, "Root port resuming, power %02x\n", power);
	109
	110	/* later, GetPortStatus will stop RESUME signaling */
	111	musb->port1_status \|= MUSB_PORT_STAT_RESUME;
	112	musb->rh_timer = jiffies + msecs_to_jiffies(20);
	113	}
	114	}
	115
	116	static void musb_port_reset(struct musb *musb, bool do_reset)
	117	{
	118	u8 power;
	119	void __iomem *mbase = musb->mregs;
	120
	121	#ifdef CONFIG_USB_MUSB_OTG
84e250ff	122	if (musb->xceiv->state == OTG_STATE_B_IDLE) {
550a7375 FB	123	DBG(2, "HNP: Returning from HNP; no hub reset from b_idle\n");
	124	musb->port1_status &= ~USB_PORT_STAT_RESET;
	125	return;
	126	}
	127	#endif
	128
	129	if (!is_host_active(musb))
	130	return;
	131
	132	/* NOTE: caller guarantees it will turn off the reset when
	133	* the appropriate amount of time has passed
	134	*/
	135	power = musb_readb(mbase, MUSB_POWER);
	136	if (do_reset) {
	137
	138	/*
	139	* If RESUME is set, we must make sure it stays minimum 20 ms.
	140	* Then we must clear RESUME and wait a bit to let musb start
	141	* generating SOFs. If we don't do this, OPT HS A 6.8 tests
	142	* fail with "Error! Did not receive an SOF before suspend
	143	* detected".
	144	*/
	145	if (power & MUSB_POWER_RESUME) {
	146	while (time_before(jiffies, musb->rh_timer))
	147	msleep(1);
	148	musb_writeb(mbase, MUSB_POWER,
	149	power & ~MUSB_POWER_RESUME);
	150	msleep(1);
	151	}
	152
	153	musb->ignore_disconnect = true;
	154	power &= 0xf0;
	155	musb_writeb(mbase, MUSB_POWER,
	156	power \| MUSB_POWER_RESET);
	157
	158	musb->port1_status \|= USB_PORT_STAT_RESET;
	159	musb->port1_status &= ~USB_PORT_STAT_ENABLE;
	160	musb->rh_timer = jiffies + msecs_to_jiffies(50);
	161	} else {
	162	DBG(4, "root port reset stopped\n");
	163	musb_writeb(mbase, MUSB_POWER,
	164	power & ~MUSB_POWER_RESET);
	165
	166	musb->ignore_disconnect = false;
	167
	168	power = musb_readb(mbase, MUSB_POWER);
	169	if (power & MUSB_POWER_HSMODE) {
	170	DBG(4, "high-speed device connected\n");
	171	musb->port1_status \|= USB_PORT_STAT_HIGH_SPEED;
	172	}
	173
	174	musb->port1_status &= ~USB_PORT_STAT_RESET;
	175	musb->port1_status \|= USB_PORT_STAT_ENABLE
	176	\| (USB_PORT_STAT_C_RESET << 16)
	177	\| (USB_PORT_STAT_C_ENABLE << 16);
	178	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	179
	180	musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
	181	}
	182	}
	183
	184	void musb_root_disconnect(struct musb *musb)
	185	{
	186	musb->port1_status = (1 << USB_PORT_FEAT_POWER)
187	\| (1 << USB_PORT_FEAT_C_CONNECTION);
188
189	usb_hcd_poll_rh_status(musb_to_hcd(musb));
190	musb->is_active = 0;
191
84e250ff	192	switch (musb->xceiv->state) {
550a7375	193	case OTG_STATE_A_SUSPEND:
1de00dae DB	194	#ifdef CONFIG_USB_MUSB_OTG
	195	if (is_otg_enabled(musb)
	196	&& musb->xceiv->host->b_hnp_enable) {
	197	musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
	198	musb->g.is_a_peripheral = 1;
	199	break;
	200	}
	201	#endif
	202	/* FALLTHROUGH */
	203	case OTG_STATE_A_HOST:
84e250ff	204	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375 FB	205	musb->is_active = 0;
	206	break;
	207	case OTG_STATE_A_WAIT_VFALL:
84e250ff	208	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	209	break;
	210	default:
	211	DBG(1, "host disconnect (%s)\n", otg_state_string(musb));
	212	}
	213	}
	214
	215
	216	/---------------------------------------------------------------------/
	217
	218	/* Caller may or may not hold musb->lock */
	219	int musb_hub_status_data(struct usb_hcd hcd, char buf)
	220	{
	221	struct musb *musb = hcd_to_musb(hcd);
	222	int retval = 0;
	223
	224	/* called in_irq() via usb_hcd_poll_rh_status() */
	225	if (musb->port1_status & 0xffff0000) {
	226	*buf = 0x02;
	227	retval = 1;
	228	}
	229	return retval;
	230	}
	231
	232	int musb_hub_control(
	233	struct usb_hcd *hcd,
	234	u16 typeReq,
	235	u16 wValue,
	236	u16 wIndex,
	237	char *buf,
	238	u16 wLength)
	239	{
	240	struct musb *musb = hcd_to_musb(hcd);
	241	u32 temp;
	242	int retval = 0;
	243	unsigned long flags;
	244
	245	spin_lock_irqsave(&musb->lock, flags);
	246
	247	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
	248	spin_unlock_irqrestore(&musb->lock, flags);
	249	return -ESHUTDOWN;
	250	}
	251
	252	/* hub features: always zero, setting is a NOP
	253	* port features: reported, sometimes updated when host is active
	254	* no indicators
	255	*/
	256	switch (typeReq) {
	257	case ClearHubFeature:
	258	case SetHubFeature:
	259	switch (wValue) {
	260	case C_HUB_OVER_CURRENT:
	261	case C_HUB_LOCAL_POWER:
	262	break;
	263	default:
	264	goto error;
	265	}
	266	break;
	267	case ClearPortFeature:
	268	if ((wIndex & 0xff) != 1)
	269	goto error;
	270
	271	switch (wValue) {
	272	case USB_PORT_FEAT_ENABLE:
273	break;
274	case USB_PORT_FEAT_SUSPEND:
275	musb_port_suspend(musb, false);
276	break;
277	case USB_PORT_FEAT_POWER:
278	if (!(is_otg_enabled(musb) && hcd->self.is_b_host))
279	musb_set_vbus(musb, 0);
280	break;
281	case USB_PORT_FEAT_C_CONNECTION:
282	case USB_PORT_FEAT_C_ENABLE:
283	case USB_PORT_FEAT_C_OVER_CURRENT:
284	case USB_PORT_FEAT_C_RESET:
285	case USB_PORT_FEAT_C_SUSPEND:
286	break;
287	default:
288	goto error;
289	}
290	DBG(5, "clear feature %d\n", wValue);
291	musb->port1_status &= ~(1 << wValue);
292	break;
293	case GetHubDescriptor:
294	{
295	struct usb_hub_descriptor desc = (void )buf;
296
297	desc->bDescLength = 9;
298	desc->bDescriptorType = 0x29;
299	desc->bNbrPorts = 1;
551509d2	300	desc->wHubCharacteristics = cpu_to_le16(
550a7375 FB	301	0x0001 /* per-port power switching */
	302	\| 0x0010 /* no overcurrent reporting */
	303	);
	304	desc->bPwrOn2PwrGood = 5; /* msec/2 */
	305	desc->bHubContrCurrent = 0;
	306
	307	/* workaround bogus struct definition */
	308	desc->DeviceRemovable[0] = 0x02; /* port 1 */
	309	desc->DeviceRemovable[1] = 0xff;
	310	}
	311	break;
	312	case GetHubStatus:
	313	temp = 0;
	314	(__le32 ) buf = cpu_to_le32(temp);
	315	break;
	316	case GetPortStatus:
	317	if (wIndex != 1)
	318	goto error;
	319
	320	/* finish RESET signaling? */
	321	if ((musb->port1_status & USB_PORT_STAT_RESET)
	322	&& time_after_eq(jiffies, musb->rh_timer))
	323	musb_port_reset(musb, false);
	324
	325	/* finish RESUME signaling? */
	326	if ((musb->port1_status & MUSB_PORT_STAT_RESUME)
	327	&& time_after_eq(jiffies, musb->rh_timer)) {
	328	u8 power;
	329
	330	power = musb_readb(musb->mregs, MUSB_POWER);
	331	power &= ~MUSB_POWER_RESUME;
	332	DBG(4, "root port resume stopped, power %02x\n",
	333	power);
	334	musb_writeb(musb->mregs, MUSB_POWER, power);
	335
	336	/* ISSUE: DaVinci (RTL 1.300) disconnects after
	337	* resume of high speed peripherals (but not full
	338	* speed ones).
	339	*/
	340
	341	musb->is_active = 1;
	342	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	343	\| MUSB_PORT_STAT_RESUME);
	344	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
	345	usb_hcd_poll_rh_status(musb_to_hcd(musb));
	346	/* NOTE: it might really be A_WAIT_BCON ... */
84e250ff	347	musb->xceiv->state = OTG_STATE_A_HOST;
550a7375 FB	348	}
	349
	350	put_unaligned(cpu_to_le32(musb->port1_status
	351	& ~MUSB_PORT_STAT_RESUME),
	352	(__le32 *) buf);
	353
	354	/* port change status is more interesting */
	355	DBG(get_unaligned((u16 *)(buf+2)) ? 2 : 5, "port status %08x\n",
	356	musb->port1_status);
	357	break;
	358	case SetPortFeature:
	359	if ((wIndex & 0xff) != 1)
	360	goto error;
	361
	362	switch (wValue) {
	363	case USB_PORT_FEAT_POWER:
	364	/* NOTE: this controller has a strange state machine
	365	* that involves "requesting sessions" according to
	366	* magic side effects from incompletely-described
	367	* rules about startup...
	368	*
	369	* This call is what really starts the host mode; be
	370	* very careful about side effects if you reorder any
	371	* initialization logic, e.g. for OTG, or change any
	372	* logic relating to VBUS power-up.
	373	*/
	374	if (!(is_otg_enabled(musb) && hcd->self.is_b_host))
	375	musb_start(musb);
	376	break;
	377	case USB_PORT_FEAT_RESET:
	378	musb_port_reset(musb, true);
	379	break;
	380	case USB_PORT_FEAT_SUSPEND:
	381	musb_port_suspend(musb, true);
	382	break;
	383	case USB_PORT_FEAT_TEST:
	384	if (unlikely(is_host_active(musb)))
	385	goto error;
	386
	387	wIndex >>= 8;
	388	switch (wIndex) {
	389	case 1:
	390	pr_debug("TEST_J\n");
	391	temp = MUSB_TEST_J;
	392	break;
	393	case 2:
	394	pr_debug("TEST_K\n");
	395	temp = MUSB_TEST_K;
	396	break;
	397	case 3:
	398	pr_debug("TEST_SE0_NAK\n");
	399	temp = MUSB_TEST_SE0_NAK;
	400	break;
	401	case 4:
	402	pr_debug("TEST_PACKET\n");
	403	temp = MUSB_TEST_PACKET;
	404	musb_load_testpacket(musb);
	405	break;
	406	case 5:
	407	pr_debug("TEST_FORCE_ENABLE\n");
	408	temp = MUSB_TEST_FORCE_HOST
	409	\| MUSB_TEST_FORCE_HS;
	410
	411	musb_writeb(musb->mregs, MUSB_DEVCTL,
412	MUSB_DEVCTL_SESSION);
413	break;
414	case 6:
415	pr_debug("TEST_FIFO_ACCESS\n");
416	temp = MUSB_TEST_FIFO_ACCESS;
417	break;
418	default:
419	goto error;
420	}
421	musb_writeb(musb->mregs, MUSB_TESTMODE, temp);
422	break;
423	default:
424	goto error;
425	}
426	DBG(5, "set feature %d\n", wValue);
427	musb->port1_status \|= 1 << wValue;
428	break;
429
430	default:
431	error:
432	/* "protocol stall" on error */
433	retval = -EPIPE;
434	}
435	spin_unlock_irqrestore(&musb->lock, flags);
436	return retval;
437	}