[deliverable/linux.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)
{
	struct usb_otg	*otg = musb->xceiv->otg;
	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;
		}

		dev_dbg(musb->controller, "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 = otg->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;
		case OTG_STATE_B_HOST:
			musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
			musb->is_active = otg->host->b_hnp_enable;
			musb_platform_try_idle(musb, 0);
			break;
		default:
			dev_dbg(musb->controller, "bogus rh suspend? %s\n",
				usb_otg_state_string(musb->xceiv->state));
		}
	} else if (power & MUSB_POWER_SUSPENDM) {
		power &= ~MUSB_POWER_SUSPENDM;
		power |= MUSB_POWER_RESUME;
		musb_writeb(mbase, MUSB_POWER, power);

		dev_dbg(musb->controller, "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;

	if (musb->xceiv->state == OTG_STATE_B_IDLE) {
		dev_dbg(musb->controller, "HNP: Returning from HNP; no hub reset from b_idle\n");
		musb->port1_status &= ~USB_PORT_STAT_RESET;
		return;
	}

	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);
		}

		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 {
		dev_dbg(musb->controller, "root port reset stopped\n");
		musb_writeb(mbase, MUSB_POWER,
				power & ~MUSB_POWER_RESET);

		power = musb_readb(mbase, MUSB_POWER);
		if (power & MUSB_POWER_HSMODE) {
			dev_dbg(musb->controller, "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->hcd);

		musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
	}
}

void musb_root_disconnect(struct musb *musb)
{
	struct usb_otg	*otg = musb->xceiv->otg;

	musb->port1_status = USB_PORT_STAT_POWER
			| (USB_PORT_STAT_C_CONNECTION << 16);

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

	switch (musb->xceiv->state) {
	case OTG_STATE_A_SUSPEND:
		if (otg->host->b_hnp_enable) {
			musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
			musb->g.is_a_peripheral = 1;
			break;
		}
		/* 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:
		dev_dbg(musb->controller, "host disconnect (%s)\n",
			usb_otg_state_string(musb->xceiv->state));
	}
}


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

/* 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(!HCD_HW_ACCESSIBLE(hcd))) {
		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 (!hcd->self.is_b_host)
				musb_platform_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;
		}
		dev_dbg(musb->controller, "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->u.hs.DeviceRemovable[0] = 0x02;	/* port 1 */
		desc->u.hs.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;
			dev_dbg(musb->controller, "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->hcd);
			/* 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 */
		dev_dbg(musb->controller, "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 (!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;
		}
		dev_dbg(musb->controller, "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
550a7375 FB	47	static void musb_port_suspend(struct musb *musb, bool do_suspend)
550a7375 FB	48	{
d445b6da	49	struct usb_otg *otg = musb->xceiv->otg;
550a7375 FB	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
5c8a86e1	77	dev_dbg(musb->controller, "Root port suspended, power %02x\n", power);
550a7375 FB	78
550a7375 FB	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;
032ec49f	83	musb->is_active = otg->host->b_hnp_enable;
ab983f2a DB	84	if (musb->is_active)
	85	mod_timer(&musb->otg_timer, jiffies
	86	+ msecs_to_jiffies(
	87	OTG_TIME_A_AIDL_BDIS));
550a7375 FB	88	musb_platform_try_idle(musb, 0);
550a7375 FB	89	break;
550a7375	90	case OTG_STATE_B_HOST:
84e250ff	91	musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
032ec49f	92	musb->is_active = otg->host->b_hnp_enable;
550a7375 FB	93	musb_platform_try_idle(musb, 0);
550a7375 FB	94	break;
550a7375	95	default:
5c8a86e1	96	dev_dbg(musb->controller, "bogus rh suspend? %s\n",
42c0bf1c	97	usb_otg_state_string(musb->xceiv->state));
550a7375 FB	98	}
	99	} else if (power & MUSB_POWER_SUSPENDM) {
	100	power &= ~MUSB_POWER_SUSPENDM;
	101	power \|= MUSB_POWER_RESUME;
	102	musb_writeb(mbase, MUSB_POWER, power);
	103
5c8a86e1	104	dev_dbg(musb->controller, "Root port resuming, power %02x\n", power);
550a7375 FB	105
	106	/* later, GetPortStatus will stop RESUME signaling */
	107	musb->port1_status \|= MUSB_PORT_STAT_RESUME;
	108	musb->rh_timer = jiffies + msecs_to_jiffies(20);
	109	}
	110	}
	111
	112	static void musb_port_reset(struct musb *musb, bool do_reset)
	113	{
	114	u8 power;
	115	void __iomem *mbase = musb->mregs;
	116
84e250ff	117	if (musb->xceiv->state == OTG_STATE_B_IDLE) {
5c8a86e1	118	dev_dbg(musb->controller, "HNP: Returning from HNP; no hub reset from b_idle\n");
550a7375 FB	119	musb->port1_status &= ~USB_PORT_STAT_RESET;
	120	return;
	121	}
550a7375 FB	122
	123	if (!is_host_active(musb))
	124	return;
	125
	126	/* NOTE: caller guarantees it will turn off the reset when
	127	* the appropriate amount of time has passed
	128	*/
	129	power = musb_readb(mbase, MUSB_POWER);
	130	if (do_reset) {
	131
	132	/*
	133	* If RESUME is set, we must make sure it stays minimum 20 ms.
	134	* Then we must clear RESUME and wait a bit to let musb start
	135	* generating SOFs. If we don't do this, OPT HS A 6.8 tests
	136	* fail with "Error! Did not receive an SOF before suspend
	137	* detected".
	138	*/
	139	if (power & MUSB_POWER_RESUME) {
	140	while (time_before(jiffies, musb->rh_timer))
	141	msleep(1);
	142	musb_writeb(mbase, MUSB_POWER,
	143	power & ~MUSB_POWER_RESUME);
	144	msleep(1);
	145	}
	146
550a7375 FB	147	power &= 0xf0;
	148	musb_writeb(mbase, MUSB_POWER,
	149	power \| MUSB_POWER_RESET);
	150
	151	musb->port1_status \|= USB_PORT_STAT_RESET;
	152	musb->port1_status &= ~USB_PORT_STAT_ENABLE;
	153	musb->rh_timer = jiffies + msecs_to_jiffies(50);
	154	} else {
5c8a86e1	155	dev_dbg(musb->controller, "root port reset stopped\n");
550a7375 FB	156	musb_writeb(mbase, MUSB_POWER,
	157	power & ~MUSB_POWER_RESET);
	158
550a7375 FB	159	power = musb_readb(mbase, MUSB_POWER);
550a7375 FB	160	if (power & MUSB_POWER_HSMODE) {
5c8a86e1	161	dev_dbg(musb->controller, "high-speed device connected\n");
550a7375 FB	162	musb->port1_status \|= USB_PORT_STAT_HIGH_SPEED;
	163	}
	164
	165	musb->port1_status &= ~USB_PORT_STAT_RESET;
	166	musb->port1_status \|= USB_PORT_STAT_ENABLE
	167	\| (USB_PORT_STAT_C_RESET << 16)
	168	\| (USB_PORT_STAT_C_ENABLE << 16);
8b125df5	169	usb_hcd_poll_rh_status(musb->hcd);
550a7375 FB	170
	171	musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
	172	}
	173	}
	174
	175	void musb_root_disconnect(struct musb *musb)
	176	{
d445b6da HK	177	struct usb_otg *otg = musb->xceiv->otg;
d445b6da HK	178
749da5f8 AS	179	musb->port1_status = USB_PORT_STAT_POWER
749da5f8 AS	180	\| (USB_PORT_STAT_C_CONNECTION << 16);
550a7375	181
8b125df5	182	usb_hcd_poll_rh_status(musb->hcd);
550a7375 FB	183	musb->is_active = 0;
550a7375 FB	184
84e250ff	185	switch (musb->xceiv->state) {
550a7375	186	case OTG_STATE_A_SUSPEND:
032ec49f	187	if (otg->host->b_hnp_enable) {
1de00dae DB	188	musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
	189	musb->g.is_a_peripheral = 1;
	190	break;
	191	}
1de00dae DB	192	/* FALLTHROUGH */
1de00dae DB	193	case OTG_STATE_A_HOST:
84e250ff	194	musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
550a7375 FB	195	musb->is_active = 0;
	196	break;
	197	case OTG_STATE_A_WAIT_VFALL:
84e250ff	198	musb->xceiv->state = OTG_STATE_B_IDLE;
550a7375 FB	199	break;
550a7375 FB	200	default:
5c8a86e1	201	dev_dbg(musb->controller, "host disconnect (%s)\n",
42c0bf1c	202	usb_otg_state_string(musb->xceiv->state));
550a7375 FB	203	}
	204	}
	205
	206
	207	/---------------------------------------------------------------------/
	208
	209	/* Caller may or may not hold musb->lock */
	210	int musb_hub_status_data(struct usb_hcd hcd, char buf)
	211	{
	212	struct musb *musb = hcd_to_musb(hcd);
	213	int retval = 0;
	214
	215	/* called in_irq() via usb_hcd_poll_rh_status() */
	216	if (musb->port1_status & 0xffff0000) {
	217	*buf = 0x02;
	218	retval = 1;
	219	}
	220	return retval;
	221	}
	222
	223	int musb_hub_control(
	224	struct usb_hcd *hcd,
	225	u16 typeReq,
	226	u16 wValue,
	227	u16 wIndex,
	228	char *buf,
	229	u16 wLength)
	230	{
	231	struct musb *musb = hcd_to_musb(hcd);
	232	u32 temp;
	233	int retval = 0;
	234	unsigned long flags;
	235
	236	spin_lock_irqsave(&musb->lock, flags);
	237
541c7d43	238	if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) {
550a7375 FB	239	spin_unlock_irqrestore(&musb->lock, flags);
	240	return -ESHUTDOWN;
	241	}
	242
	243	/* hub features: always zero, setting is a NOP
	244	* port features: reported, sometimes updated when host is active
	245	* no indicators
	246	*/
	247	switch (typeReq) {
	248	case ClearHubFeature:
	249	case SetHubFeature:
	250	switch (wValue) {
	251	case C_HUB_OVER_CURRENT:
	252	case C_HUB_LOCAL_POWER:
	253	break;
	254	default:
	255	goto error;
	256	}
	257	break;
	258	case ClearPortFeature:
	259	if ((wIndex & 0xff) != 1)
	260	goto error;
	261
	262	switch (wValue) {
	263	case USB_PORT_FEAT_ENABLE:
	264	break;
	265	case USB_PORT_FEAT_SUSPEND:
	266	musb_port_suspend(musb, false);
	267	break;
	268	case USB_PORT_FEAT_POWER:
032ec49f	269	if (!hcd->self.is_b_host)
743411b3	270	musb_platform_set_vbus(musb, 0);
550a7375 FB	271	break;
	272	case USB_PORT_FEAT_C_CONNECTION:
	273	case USB_PORT_FEAT_C_ENABLE:
	274	case USB_PORT_FEAT_C_OVER_CURRENT:
	275	case USB_PORT_FEAT_C_RESET:
	276	case USB_PORT_FEAT_C_SUSPEND:
	277	break;
	278	default:
	279	goto error;
	280	}
5c8a86e1	281	dev_dbg(musb->controller, "clear feature %d\n", wValue);
550a7375 FB	282	musb->port1_status &= ~(1 << wValue);
	283	break;
	284	case GetHubDescriptor:
	285	{
	286	struct usb_hub_descriptor desc = (void )buf;
	287
	288	desc->bDescLength = 9;
	289	desc->bDescriptorType = 0x29;
	290	desc->bNbrPorts = 1;
551509d2	291	desc->wHubCharacteristics = cpu_to_le16(
550a7375 FB	292	0x0001 /* per-port power switching */
	293	\| 0x0010 /* no overcurrent reporting */
	294	);
	295	desc->bPwrOn2PwrGood = 5; /* msec/2 */
	296	desc->bHubContrCurrent = 0;
	297
	298	/* workaround bogus struct definition */
dbe79bbe JY	299	desc->u.hs.DeviceRemovable[0] = 0x02; /* port 1 */
dbe79bbe JY	300	desc->u.hs.DeviceRemovable[1] = 0xff;
550a7375 FB	301	}
	302	break;
	303	case GetHubStatus:
	304	temp = 0;
	305	(__le32 ) buf = cpu_to_le32(temp);
	306	break;
	307	case GetPortStatus:
	308	if (wIndex != 1)
	309	goto error;
	310
	311	/* finish RESET signaling? */
	312	if ((musb->port1_status & USB_PORT_STAT_RESET)
	313	&& time_after_eq(jiffies, musb->rh_timer))
	314	musb_port_reset(musb, false);
	315
	316	/* finish RESUME signaling? */
	317	if ((musb->port1_status & MUSB_PORT_STAT_RESUME)
	318	&& time_after_eq(jiffies, musb->rh_timer)) {
	319	u8 power;
	320
	321	power = musb_readb(musb->mregs, MUSB_POWER);
	322	power &= ~MUSB_POWER_RESUME;
5c8a86e1	323	dev_dbg(musb->controller, "root port resume stopped, power %02x\n",
550a7375 FB	324	power);
	325	musb_writeb(musb->mregs, MUSB_POWER, power);
	326
	327	/* ISSUE: DaVinci (RTL 1.300) disconnects after
	328	* resume of high speed peripherals (but not full
	329	* speed ones).
	330	*/
	331
	332	musb->is_active = 1;
	333	musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
	334	\| MUSB_PORT_STAT_RESUME);
	335	musb->port1_status \|= USB_PORT_STAT_C_SUSPEND << 16;
8b125df5	336	usb_hcd_poll_rh_status(musb->hcd);
550a7375	337	/* NOTE: it might really be A_WAIT_BCON ... */
84e250ff	338	musb->xceiv->state = OTG_STATE_A_HOST;
550a7375 FB	339	}
	340
	341	put_unaligned(cpu_to_le32(musb->port1_status
	342	& ~MUSB_PORT_STAT_RESUME),
	343	(__le32 *) buf);
	344
	345	/* port change status is more interesting */
5c8a86e1	346	dev_dbg(musb->controller, "port status %08x\n",
550a7375 FB	347	musb->port1_status);
	348	break;
	349	case SetPortFeature:
	350	if ((wIndex & 0xff) != 1)
	351	goto error;
	352
	353	switch (wValue) {
	354	case USB_PORT_FEAT_POWER:
	355	/* NOTE: this controller has a strange state machine
	356	* that involves "requesting sessions" according to
	357	* magic side effects from incompletely-described
	358	* rules about startup...
	359	*
	360	* This call is what really starts the host mode; be
	361	* very careful about side effects if you reorder any
	362	* initialization logic, e.g. for OTG, or change any
	363	* logic relating to VBUS power-up.
	364	*/
032ec49f	365	if (!hcd->self.is_b_host)
550a7375 FB	366	musb_start(musb);
	367	break;
	368	case USB_PORT_FEAT_RESET:
	369	musb_port_reset(musb, true);
	370	break;
	371	case USB_PORT_FEAT_SUSPEND:
	372	musb_port_suspend(musb, true);
	373	break;
	374	case USB_PORT_FEAT_TEST:
	375	if (unlikely(is_host_active(musb)))
	376	goto error;
	377
	378	wIndex >>= 8;
	379	switch (wIndex) {
	380	case 1:
	381	pr_debug("TEST_J\n");
	382	temp = MUSB_TEST_J;
	383	break;
	384	case 2:
	385	pr_debug("TEST_K\n");
	386	temp = MUSB_TEST_K;
	387	break;
	388	case 3:
	389	pr_debug("TEST_SE0_NAK\n");
	390	temp = MUSB_TEST_SE0_NAK;
	391	break;
	392	case 4:
	393	pr_debug("TEST_PACKET\n");
	394	temp = MUSB_TEST_PACKET;
	395	musb_load_testpacket(musb);
	396	break;
	397	case 5:
	398	pr_debug("TEST_FORCE_ENABLE\n");
	399	temp = MUSB_TEST_FORCE_HOST
	400	\| MUSB_TEST_FORCE_HS;
	401
	402	musb_writeb(musb->mregs, MUSB_DEVCTL,
	403	MUSB_DEVCTL_SESSION);
	404	break;
	405	case 6:
	406	pr_debug("TEST_FIFO_ACCESS\n");
	407	temp = MUSB_TEST_FIFO_ACCESS;
	408	break;
	409	default:
	410	goto error;
	411	}
	412	musb_writeb(musb->mregs, MUSB_TESTMODE, temp);
	413	break;
	414	default:
	415	goto error;
	416	}
5c8a86e1	417	dev_dbg(musb->controller, "set feature %d\n", wValue);
550a7375 FB	418	musb->port1_status \|= 1 << wValue;
	419	break;
	420
	421	default:
	422	error:
	423	/* "protocol stall" on error */
	424	retval = -EPIPE;
	425	}
	426	spin_unlock_irqrestore(&musb->lock, flags);
	427	return retval;
	428	}