isp116x-hcd.c 43.8 KB
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/*
 * ISP116x HCD (Host Controller Driver) for USB.
 *
 * Derived from the SL811 HCD, rewritten for ISP116x.
 * Copyright (C) 2005 Olav Kongas <ok@artecdesign.ee>
 *
 * Portions:
 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
 * Copyright (C) 2004 David Brownell
 *
 * Periodic scheduling is based on Roman's OHCI code
 * Copyright (C) 1999 Roman Weissgaerber
 *
 */

/*
 * The driver basically works. A number of people have used it with a range
 * of devices.
 *
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 * The driver passes all usbtests 1-14.
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 *
 * Suspending/resuming of root hub via sysfs works. Remote wakeup works too.
 * And suspending/resuming of platform device works too. Suspend/resume
 * via HCD operations vector is not implemented.
 *
 * Iso transfer support is not implemented. Adding this would include
 * implementing recovery from the failure to service the processed ITL
 * fifo ram in time, which will involve chip reset.
 *
 * TODO:
 + More testing of suspend/resume.
*/

/*
  ISP116x chips require certain delays between accesses to its
  registers. The following timing options exist.

  1. Configure your memory controller (the best)
  2. Implement platform-specific delay function possibly
  combined with configuring the memory controller; see
  include/linux/usb-isp116x.h for more info. Some broken
  memory controllers line LH7A400 SMC need this. Also,
  uncomment for that to work the following
  USE_PLATFORM_DELAY macro.
  3. Use ndelay (easiest, poorest). For that, uncomment
  the following USE_NDELAY macro.
*/
#define USE_PLATFORM_DELAY
//#define USE_NDELAY

//#define DEBUG
//#define VERBOSE
/* Transfer descriptors. See dump_ptd() for printout format  */
//#define PTD_TRACE
/* enqueuing/finishing log of urbs */
//#define URB_TRACE

#include <linux/module.h>
#include <linux/delay.h>
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#include <linux/debugfs.h>
#include <linux/seq_file.h>
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#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/usb.h>
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#include <linux/usb/isp116x.h>
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#include <linux/platform_device.h>
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#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/byteorder.h>

#include "../core/hcd.h"
#include "isp116x.h"

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#define DRIVER_VERSION	"03 Nov 2005"
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#define DRIVER_DESC	"ISP116x USB Host Controller Driver"

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

static const char hcd_name[] = "isp116x-hcd";

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

/*
  Write len bytes to fifo, pad till 32-bit boundary
 */
static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len)
{
	u8 *dp = (u8 *) buf;
	u16 *dp2 = (u16 *) buf;
	u16 w;
	int quot = len % 4;

	if ((unsigned long)dp2 & 1) {
		/* not aligned */
		for (; len > 1; len -= 2) {
			w = *dp++;
			w |= *dp++ << 8;
			isp116x_raw_write_data16(isp116x, w);
		}
		if (len)
			isp116x_write_data16(isp116x, (u16) * dp);
	} else {
		/* aligned */
		for (; len > 1; len -= 2)
			isp116x_raw_write_data16(isp116x, *dp2++);
		if (len)
			isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2));
	}
	if (quot == 1 || quot == 2)
		isp116x_raw_write_data16(isp116x, 0);
}

/*
  Read len bytes from fifo and then read till 32-bit boundary.
 */
static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len)
{
	u8 *dp = (u8 *) buf;
	u16 *dp2 = (u16 *) buf;
	u16 w;
	int quot = len % 4;

	if ((unsigned long)dp2 & 1) {
		/* not aligned */
		for (; len > 1; len -= 2) {
			w = isp116x_raw_read_data16(isp116x);
			*dp++ = w & 0xff;
			*dp++ = (w >> 8) & 0xff;
		}
		if (len)
			*dp = 0xff & isp116x_read_data16(isp116x);
	} else {
		/* aligned */
		for (; len > 1; len -= 2)
			*dp2++ = isp116x_raw_read_data16(isp116x);
		if (len)
			*(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x);
	}
	if (quot == 1 || quot == 2)
		isp116x_raw_read_data16(isp116x);
}

/*
  Write ptd's and data for scheduled transfers into
  the fifo ram. Fifo must be empty and ready.
*/
static void pack_fifo(struct isp116x *isp116x)
{
	struct isp116x_ep *ep;
	struct ptd *ptd;
	int buflen = isp116x->atl_last_dir == PTD_DIR_IN
	    ? isp116x->atl_bufshrt : isp116x->atl_buflen;

	isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
	isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
	isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET);
	for (ep = isp116x->atl_active; ep; ep = ep->active) {
		ptd = &ep->ptd;
		dump_ptd(ptd);
		dump_ptd_out_data(ptd, ep->data);
		isp116x_write_data16(isp116x, ptd->count);
		isp116x_write_data16(isp116x, ptd->mps);
		isp116x_write_data16(isp116x, ptd->len);
		isp116x_write_data16(isp116x, ptd->faddr);
		buflen -= sizeof(struct ptd);
		/* Skip writing data for last IN PTD */
		if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) {
			write_ptddata_to_fifo(isp116x, ep->data, ep->length);
			buflen -= ALIGN(ep->length, 4);
		}
	}
	BUG_ON(buflen);
}

/*
  Read the processed ptd's and data from fifo ram back to
  URBs' buffers. Fifo must be full and done
*/
static void unpack_fifo(struct isp116x *isp116x)
{
	struct isp116x_ep *ep;
	struct ptd *ptd;
	int buflen = isp116x->atl_last_dir == PTD_DIR_IN
	    ? isp116x->atl_buflen : isp116x->atl_bufshrt;

	isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
	isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
	isp116x_write_addr(isp116x, HCATLPORT);
	for (ep = isp116x->atl_active; ep; ep = ep->active) {
		ptd = &ep->ptd;
		ptd->count = isp116x_read_data16(isp116x);
		ptd->mps = isp116x_read_data16(isp116x);
		ptd->len = isp116x_read_data16(isp116x);
		ptd->faddr = isp116x_read_data16(isp116x);
		buflen -= sizeof(struct ptd);
		/* Skip reading data for last Setup or Out PTD */
		if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) {
			read_ptddata_from_fifo(isp116x, ep->data, ep->length);
			buflen -= ALIGN(ep->length, 4);
		}
		dump_ptd(ptd);
		dump_ptd_in_data(ptd, ep->data);
	}
	BUG_ON(buflen);
}

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

/*
  Set up PTD's.
*/
static void preproc_atl_queue(struct isp116x *isp116x)
{
	struct isp116x_ep *ep;
	struct urb *urb;
	struct ptd *ptd;
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	u16 len;
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	for (ep = isp116x->atl_active; ep; ep = ep->active) {
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		u16 toggle = 0, dir = PTD_DIR_SETUP;

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		BUG_ON(list_empty(&ep->hep->urb_list));
		urb = container_of(ep->hep->urb_list.next,
				   struct urb, urb_list);
		ptd = &ep->ptd;
		len = ep->length;
		ep->data = (unsigned char *)urb->transfer_buffer
		    + urb->actual_length;

		switch (ep->nextpid) {
		case USB_PID_IN:
			toggle = usb_gettoggle(urb->dev, ep->epnum, 0);
			dir = PTD_DIR_IN;
			break;
		case USB_PID_OUT:
			toggle = usb_gettoggle(urb->dev, ep->epnum, 1);
			dir = PTD_DIR_OUT;
			break;
		case USB_PID_SETUP:
			len = sizeof(struct usb_ctrlrequest);
			ep->data = urb->setup_packet;
			break;
		case USB_PID_ACK:
			toggle = 1;
			len = 0;
			dir = (urb->transfer_buffer_length
			       && usb_pipein(urb->pipe))
			    ? PTD_DIR_OUT : PTD_DIR_IN;
			break;
		default:
			ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__,
			    ep->nextpid);
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			BUG();
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		}

		ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle);
		ptd->mps = PTD_MPS(ep->maxpacket)
		    | PTD_SPD(urb->dev->speed == USB_SPEED_LOW)
		    | PTD_EP(ep->epnum);
		ptd->len = PTD_LEN(len) | PTD_DIR(dir);
		ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe));
		if (!ep->active) {
			ptd->mps |= PTD_LAST_MSK;
			isp116x->atl_last_dir = dir;
		}
		isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen;
		isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4);
	}
}

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/*
  Take done or failed requests out of schedule. Give back
  processed urbs.
*/
static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep,
			   struct urb *urb)
__releases(isp116x->lock) __acquires(isp116x->lock)
{
	unsigned i;

	urb->hcpriv = NULL;
	ep->error_count = 0;

	if (usb_pipecontrol(urb->pipe))
		ep->nextpid = USB_PID_SETUP;

	urb_dbg(urb, "Finish");

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	usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb);
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	spin_unlock(&isp116x->lock);
	usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb);
	spin_lock(&isp116x->lock);

	/* take idle endpoints out of the schedule */
	if (!list_empty(&ep->hep->urb_list))
		return;

	/* async deschedule */
	if (!list_empty(&ep->schedule)) {
		list_del_init(&ep->schedule);
		return;
	}

	/* periodic deschedule */
	DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
	for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
		struct isp116x_ep *temp;
		struct isp116x_ep **prev = &isp116x->periodic[i];

		while (*prev && ((temp = *prev) != ep))
			prev = &temp->next;
		if (*prev)
			*prev = ep->next;
		isp116x->load[i] -= ep->load;
	}
	ep->branch = PERIODIC_SIZE;
	isp116x_to_hcd(isp116x)->self.bandwidth_allocated -=
	    ep->load / ep->period;

	/* switch irq type? */
	if (!--isp116x->periodic_count) {
		isp116x->irqenb &= ~HCuPINT_SOF;
		isp116x->irqenb |= HCuPINT_ATL;
	}
}

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/*
  Analyze transfer results, handle partial transfers and errors
*/
static void postproc_atl_queue(struct isp116x *isp116x)
{
	struct isp116x_ep *ep;
	struct urb *urb;
	struct usb_device *udev;
	struct ptd *ptd;
	int short_not_ok;
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	int status;
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	u8 cc;

	for (ep = isp116x->atl_active; ep; ep = ep->active) {
		BUG_ON(list_empty(&ep->hep->urb_list));
		urb =
		    container_of(ep->hep->urb_list.next, struct urb, urb_list);
		udev = urb->dev;
		ptd = &ep->ptd;
		cc = PTD_GET_CC(ptd);
		short_not_ok = 1;
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		status = -EINPROGRESS;
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		/* Data underrun is special. For allowed underrun
		   we clear the error and continue as normal. For
		   forbidden underrun we finish the DATA stage
		   immediately while for control transfer,
		   we do a STATUS stage. */
		if (cc == TD_DATAUNDERRUN) {
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			if (!(urb->transfer_flags & URB_SHORT_NOT_OK) ||
					usb_pipecontrol(urb->pipe)) {
				DBG("Allowed or control data underrun\n");
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				cc = TD_CC_NOERROR;
				short_not_ok = 0;
			} else {
				ep->error_count = 1;
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				usb_settoggle(udev, ep->epnum,
					      ep->nextpid == USB_PID_OUT,
					      PTD_GET_TOGGLE(ptd));
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				urb->actual_length += PTD_GET_COUNT(ptd);
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				status = cc_to_error[TD_DATAUNDERRUN];
				goto done;
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			}
		}

		if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED
		    && (++ep->error_count >= 3 || cc == TD_CC_STALL
			|| cc == TD_DATAOVERRUN)) {
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			status = cc_to_error[cc];
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			if (ep->nextpid == USB_PID_ACK)
				ep->nextpid = 0;
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			goto done;
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		}
		/* According to usb spec, zero-length Int transfer signals
		   finishing of the urb. Hey, does this apply only
		   for IN endpoints? */
		if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) {
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			status = 0;
			goto done;
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		}

		/* Relax after previously failed, but later succeeded
		   or correctly NAK'ed retransmission attempt */
		if (ep->error_count
		    && (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED))
			ep->error_count = 0;

		/* Take into account idiosyncracies of the isp116x chip
		   regarding toggle bit for failed transfers */
		if (ep->nextpid == USB_PID_OUT)
			usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd)
				      ^ (ep->error_count > 0));
		else if (ep->nextpid == USB_PID_IN)
			usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd)
				      ^ (ep->error_count > 0));

		switch (ep->nextpid) {
		case USB_PID_IN:
		case USB_PID_OUT:
			urb->actual_length += PTD_GET_COUNT(ptd);
			if (PTD_GET_ACTIVE(ptd)
			    || (cc != TD_CC_NOERROR && cc < 0x0E))
				break;
			if (urb->transfer_buffer_length != urb->actual_length) {
				if (short_not_ok)
					break;
			} else {
				if (urb->transfer_flags & URB_ZERO_PACKET
				    && ep->nextpid == USB_PID_OUT
				    && !(PTD_GET_COUNT(ptd) % ep->maxpacket)) {
					DBG("Zero packet requested\n");
					break;
				}
			}
			/* All data for this URB is transferred, let's finish */
			if (usb_pipecontrol(urb->pipe))
				ep->nextpid = USB_PID_ACK;
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			else
				status = 0;
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			break;
		case USB_PID_SETUP:
			if (PTD_GET_ACTIVE(ptd)
			    || (cc != TD_CC_NOERROR && cc < 0x0E))
				break;
			if (urb->transfer_buffer_length == urb->actual_length)
				ep->nextpid = USB_PID_ACK;
			else if (usb_pipeout(urb->pipe)) {
				usb_settoggle(udev, 0, 1, 1);
				ep->nextpid = USB_PID_OUT;
			} else {
				usb_settoggle(udev, 0, 0, 1);
				ep->nextpid = USB_PID_IN;
			}
			break;
		case USB_PID_ACK:
			if (PTD_GET_ACTIVE(ptd)
			    || (cc != TD_CC_NOERROR && cc < 0x0E))
				break;
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			if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
					urb->actual_length <
						urb->transfer_buffer_length)
				status = -EREMOTEIO;
			else
				status = 0;
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			ep->nextpid = 0;
			break;
		default:
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			BUG();
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		}

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 done:
		if (status != -EINPROGRESS) {
			spin_lock(&urb->lock);
			if (urb->status == -EINPROGRESS)
				urb->status = status;
			spin_unlock(&urb->lock);
		}
		if (urb->status != -EINPROGRESS)
			finish_request(isp116x, ep, urb);
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	}
}

/*
  Scan transfer lists, schedule transfers, send data off
  to chip.
 */
static void start_atl_transfers(struct isp116x *isp116x)
{
	struct isp116x_ep *last_ep = NULL, *ep;
	struct urb *urb;
	u16 load = 0;
	int len, index, speed, byte_time;

	if (atomic_read(&isp116x->atl_finishing))
		return;

	if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state))
		return;

	/* FIFO not empty? */
	if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL)
		return;

	isp116x->atl_active = NULL;
	isp116x->atl_buflen = isp116x->atl_bufshrt = 0;

	/* Schedule int transfers */
	if (isp116x->periodic_count) {
		isp116x->fmindex = index =
		    (isp116x->fmindex + 1) & (PERIODIC_SIZE - 1);
		if ((load = isp116x->load[index])) {
			/* Bring all int transfers for this frame
			   into the active queue */
			isp116x->atl_active = last_ep =
			    isp116x->periodic[index];
			while (last_ep->next)
				last_ep = (last_ep->active = last_ep->next);
			last_ep->active = NULL;
		}
	}

	/* Schedule control/bulk transfers */
	list_for_each_entry(ep, &isp116x->async, schedule) {
		urb = container_of(ep->hep->urb_list.next,
				   struct urb, urb_list);
		speed = urb->dev->speed;
		byte_time = speed == USB_SPEED_LOW
		    ? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED;

		if (ep->nextpid == USB_PID_SETUP) {
			len = sizeof(struct usb_ctrlrequest);
		} else if (ep->nextpid == USB_PID_ACK) {
			len = 0;
		} else {
			/* Find current free length ... */
			len = (MAX_LOAD_LIMIT - load) / byte_time;

			/* ... then limit it to configured max size ... */
			len = min(len, speed == USB_SPEED_LOW ?
				  MAX_TRANSFER_SIZE_LOWSPEED :
				  MAX_TRANSFER_SIZE_FULLSPEED);

			/* ... and finally cut to the multiple of MaxPacketSize,
			   or to the real length if there's enough room. */
			if (len <
			    (urb->transfer_buffer_length -
			     urb->actual_length)) {
				len -= len % ep->maxpacket;
				if (!len)
					continue;
			} else
				len = urb->transfer_buffer_length -
				    urb->actual_length;
			BUG_ON(len < 0);
		}

		load += len * byte_time;
		if (load > MAX_LOAD_LIMIT)
			break;

		ep->active = NULL;
		ep->length = len;
		if (last_ep)
			last_ep->active = ep;
		else
			isp116x->atl_active = ep;
		last_ep = ep;
	}

	/* Avoid starving of endpoints */
	if ((&isp116x->async)->next != (&isp116x->async)->prev)
		list_move(&isp116x->async, (&isp116x->async)->next);

	if (isp116x->atl_active) {
		preproc_atl_queue(isp116x);
		pack_fifo(isp116x);
	}
}

/*
  Finish the processed transfers
*/
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static void finish_atl_transfers(struct isp116x *isp116x)
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{
	if (!isp116x->atl_active)
		return;
	/* Fifo not ready? */
	if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE))
		return;

	atomic_inc(&isp116x->atl_finishing);
	unpack_fifo(isp116x);
	postproc_atl_queue(isp116x);
	atomic_dec(&isp116x->atl_finishing);
}

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static irqreturn_t isp116x_irq(struct usb_hcd *hcd)
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{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	u16 irqstat;
	irqreturn_t ret = IRQ_NONE;

	spin_lock(&isp116x->lock);
	isp116x_write_reg16(isp116x, HCuPINTENB, 0);
	irqstat = isp116x_read_reg16(isp116x, HCuPINT);
	isp116x_write_reg16(isp116x, HCuPINT, irqstat);

	if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
		ret = IRQ_HANDLED;
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		finish_atl_transfers(isp116x);
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	}

	if (irqstat & HCuPINT_OPR) {
		u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT);
		isp116x_write_reg32(isp116x, HCINTSTAT, intstat);
		if (intstat & HCINT_UE) {
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			ERR("Unrecoverable error, HC is dead!\n");
			/* IRQ's are off, we do no DMA,
			   perfectly ready to die ... */
			hcd->state = HC_STATE_HALT;
			ret = IRQ_HANDLED;
			goto done;
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		}
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		if (intstat & HCINT_RHSC)
			/* When root hub or any of its ports is going
			   to come out of suspend, it may take more
			   than 10ms for status bits to stabilize. */
			mod_timer(&hcd->rh_timer, jiffies
				  + msecs_to_jiffies(20) + 1);
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		if (intstat & HCINT_RD) {
			DBG("---- remote wakeup\n");
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			usb_hcd_resume_root_hub(hcd);
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		}
		irqstat &= ~HCuPINT_OPR;
		ret = IRQ_HANDLED;
	}

	if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
		start_atl_transfers(isp116x);
	}

	isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
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      done:
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	spin_unlock(&isp116x->lock);
	return ret;
}

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

/* usb 1.1 says max 90% of a frame is available for periodic transfers.
 * this driver doesn't promise that much since it's got to handle an
 * IRQ per packet; irq handling latencies also use up that time.
 */

/* out of 1000 us */
#define	MAX_PERIODIC_LOAD	600
static int balance(struct isp116x *isp116x, u16 period, u16 load)
{
	int i, branch = -ENOSPC;

	/* search for the least loaded schedule branch of that period
	   which has enough bandwidth left unreserved. */
	for (i = 0; i < period; i++) {
		if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) {
			int j;

			for (j = i; j < PERIODIC_SIZE; j += period) {
				if ((isp116x->load[j] + load)
				    > MAX_PERIODIC_LOAD)
					break;
			}
			if (j < PERIODIC_SIZE)
				continue;
			branch = i;
		}
	}
	return branch;
}

/* NB! ALL the code above this point runs with isp116x->lock
   held, irqs off
*/

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

static int isp116x_urb_enqueue(struct usb_hcd *hcd,
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			       struct urb *urb,
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			       gfp_t mem_flags)
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{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	struct usb_device *udev = urb->dev;
	unsigned int pipe = urb->pipe;
	int is_out = !usb_pipein(pipe);
	int type = usb_pipetype(pipe);
	int epnum = usb_pipeendpoint(pipe);
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	struct usb_host_endpoint *hep = urb->ep;
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	struct isp116x_ep *ep = NULL;
	unsigned long flags;
	int i;
	int ret = 0;

	urb_dbg(urb, "Enqueue");

	if (type == PIPE_ISOCHRONOUS) {
		ERR("Isochronous transfers not supported\n");
		urb_dbg(urb, "Refused to enqueue");
		return -ENXIO;
	}
	/* avoid all allocations within spinlocks: request or endpoint */
	if (!hep->hcpriv) {
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		ep = kzalloc(sizeof *ep, mem_flags);
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		if (!ep)
			return -ENOMEM;
	}

	spin_lock_irqsave(&isp116x->lock, flags);
	if (!HC_IS_RUNNING(hcd->state)) {
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		kfree(ep);
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		ret = -ENODEV;
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		goto fail_not_linked;
	}
	ret = usb_hcd_link_urb_to_ep(hcd, urb);
	if (ret) {
		kfree(ep);
		goto fail_not_linked;
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	}

	if (hep->hcpriv)
		ep = hep->hcpriv;
	else {
		INIT_LIST_HEAD(&ep->schedule);
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		ep->udev = udev;
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		ep->epnum = epnum;
		ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
		usb_settoggle(udev, epnum, is_out, 0);

		if (type == PIPE_CONTROL) {
			ep->nextpid = USB_PID_SETUP;
		} else if (is_out) {
			ep->nextpid = USB_PID_OUT;
		} else {
			ep->nextpid = USB_PID_IN;
		}

		if (urb->interval) {
			/*
			   With INT URBs submitted, the driver works with SOF
			   interrupt enabled and ATL interrupt disabled. After
			   the PTDs are written to fifo ram, the chip starts
			   fifo processing and usb transfers after the next
			   SOF and continues until the transfers are finished
			   (succeeded or failed) or the frame ends. Therefore,
			   the transfers occur only in every second frame,
			   while fifo reading/writing and data processing
			   occur in every other second frame. */
			if (urb->interval < 2)
				urb->interval = 2;
			if (urb->interval > 2 * PERIODIC_SIZE)
				urb->interval = 2 * PERIODIC_SIZE;
			ep->period = urb->interval >> 1;
			ep->branch = PERIODIC_SIZE;
			ep->load = usb_calc_bus_time(udev->speed,
						     !is_out,
						     (type == PIPE_ISOCHRONOUS),
						     usb_maxpacket(udev, pipe,
								   is_out)) /
			    1000;
		}
		hep->hcpriv = ep;
		ep->hep = hep;
	}

	/* maybe put endpoint into schedule */
	switch (type) {
	case PIPE_CONTROL:
	case PIPE_BULK:
		if (list_empty(&ep->schedule))
			list_add_tail(&ep->schedule, &isp116x->async);
		break;
	case PIPE_INTERRUPT:
		urb->interval = ep->period;
		ep->length = min((int)ep->maxpacket,
				 urb->transfer_buffer_length);

		/* urb submitted for already existing endpoint */
		if (ep->branch < PERIODIC_SIZE)
			break;

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		ep->branch = ret = balance(isp116x, ep->period, ep->load);
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		if (ret < 0)
			goto fail;
		ret = 0;

		urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1))
		    + ep->branch;

		/* sort each schedule branch by period (slow before fast)
		   to share the faster parts of the tree without needing
		   dummy/placeholder nodes */
		DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
		for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
			struct isp116x_ep **prev = &isp116x->periodic[i];
			struct isp116x_ep *here = *prev;

			while (here && ep != here) {
				if (ep->period > here->period)
					break;
				prev = &here->next;
				here = *prev;
			}
			if (ep != here) {
				ep->next = here;
				*prev = ep;
			}
			isp116x->load[i] += ep->load;
		}
		hcd->self.bandwidth_allocated += ep->load / ep->period;

		/* switch over to SOFint */
		if (!isp116x->periodic_count++) {
			isp116x->irqenb &= ~HCuPINT_ATL;
			isp116x->irqenb |= HCuPINT_SOF;
			isp116x_write_reg16(isp116x, HCuPINTENB,
					    isp116x->irqenb);
		}
	}

	urb->hcpriv = hep;
	start_atl_transfers(isp116x);

      fail:
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	if (ret)
		usb_hcd_unlink_urb_from_ep(hcd, urb);
      fail_not_linked:
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	spin_unlock_irqrestore(&isp116x->lock, flags);
	return ret;
}

/*
   Dequeue URBs.
*/
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static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
		int status)
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{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	struct usb_host_endpoint *hep;
	struct isp116x_ep *ep, *ep_act;
	unsigned long flags;
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	int rc;
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	spin_lock_irqsave(&isp116x->lock, flags);
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	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
	if (rc)
		goto done;

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	hep = urb->hcpriv;
	ep = hep->hcpriv;
	WARN_ON(hep != ep->hep);

	/* In front of queue? */
	if (ep->hep->urb_list.next == &urb->urb_list)
		/* active? */
		for (ep_act = isp116x->atl_active; ep_act;
		     ep_act = ep_act->active)
			if (ep_act == ep) {
				VDBG("dequeue, urb %p active; wait for irq\n",
				     urb);
				urb = NULL;
				break;
			}

	if (urb)
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		finish_request(isp116x, ep, urb);
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 done:
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	spin_unlock_irqrestore(&isp116x->lock, flags);
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	return rc;
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}

static void isp116x_endpoint_disable(struct usb_hcd *hcd,
				     struct usb_host_endpoint *hep)
{
	int i;
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	struct isp116x_ep *ep = hep->hcpriv;
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	if (!ep)
		return;

	/* assume we'd just wait for the irq */
	for (i = 0; i < 100 && !list_empty(&hep->urb_list); i++)
		msleep(3);
	if (!list_empty(&hep->urb_list))
		WARN("ep %p not empty?\n", ep);

	kfree(ep);
	hep->hcpriv = NULL;
}

static int isp116x_get_frame(struct usb_hcd *hcd)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	u32 fmnum;
	unsigned long flags;

	spin_lock_irqsave(&isp116x->lock, flags);
	fmnum = isp116x_read_reg32(isp116x, HCFMNUM);
	spin_unlock_irqrestore(&isp116x->lock, flags);
	return (int)fmnum;
}

/*
  Adapted from ohci-hub.c. Currently we don't support autosuspend.
*/
static int isp116x_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	int ports, i, changed = 0;
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	unsigned long flags;
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	if (!HC_IS_RUNNING(hcd->state))
		return -ESHUTDOWN;

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	/* Report no status change now, if we are scheduled to be
	   called later */
	if (timer_pending(&hcd->rh_timer))
		return 0;
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	ports = isp116x->rhdesca & RH_A_NDP;
	spin_lock_irqsave(&isp116x->lock, flags);
	isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
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	if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC))
		buf[0] = changed = 1;
	else
		buf[0] = 0;

	for (i = 0; i < ports; i++) {
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		u32 status = isp116x->rhport[i] =
		    isp116x_read_reg32(isp116x, i ? HCRHPORT2 : HCRHPORT1);
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		if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
			      | RH_PS_OCIC | RH_PS_PRSC)) {
			changed = 1;
			buf[0] |= 1 << (i + 1);
			continue;
		}
	}
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	spin_unlock_irqrestore(&isp116x->lock, flags);
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	return changed;
}

static void isp116x_hub_descriptor(struct isp116x *isp116x,
				   struct usb_hub_descriptor *desc)
{
	u32 reg = isp116x->rhdesca;

	desc->bDescriptorType = 0x29;
	desc->bDescLength = 9;
	desc->bHubContrCurrent = 0;
	desc->bNbrPorts = (u8) (reg & 0x3);
	/* Power switching, device type, overcurrent. */
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	desc->wHubCharacteristics = cpu_to_le16((u16) ((reg >> 8) & 0x1f));
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	desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff);
	/* two bitmaps:  ports removable, and legacy PortPwrCtrlMask */
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	desc->bitmap[0] = 0;
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	desc->bitmap[1] = ~0;
}

/* Perform reset of a given port.
   It would be great to just start the reset and let the
   USB core to clear the reset in due time. However,
   root hub ports should be reset for at least 50 ms, while
   our chip stays in reset for about 10 ms. I.e., we must
   repeatedly reset it ourself here.
*/
static inline void root_port_reset(struct isp116x *isp116x, unsigned port)
{
	u32 tmp;
	unsigned long flags, t;

	/* Root hub reset should be 50 ms, but some devices
	   want it even longer. */
	t = jiffies + msecs_to_jiffies(100);

	while (time_before(jiffies, t)) {
		spin_lock_irqsave(&isp116x->lock, flags);
		/* spin until any current reset finishes */
		for (;;) {
			tmp = isp116x_read_reg32(isp116x, port ?
						 HCRHPORT2 : HCRHPORT1);
			if (!(tmp & RH_PS_PRS))
				break;
			udelay(500);
		}
		/* Don't reset a disconnected port */
		if (!(tmp & RH_PS_CCS)) {
			spin_unlock_irqrestore(&isp116x->lock, flags);
			break;
		}
		/* Reset lasts 10ms (claims datasheet) */
		isp116x_write_reg32(isp116x, port ? HCRHPORT2 :
				    HCRHPORT1, (RH_PS_PRS));
		spin_unlock_irqrestore(&isp116x->lock, flags);
		msleep(10);
	}
}

/* Adapted from ohci-hub.c */
static int isp116x_hub_control(struct usb_hcd *hcd,
			       u16 typeReq,
			       u16 wValue, u16 wIndex, char *buf, u16 wLength)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	int ret = 0;
	unsigned long flags;
	int ports = isp116x->rhdesca & RH_A_NDP;
	u32 tmp = 0;

	switch (typeReq) {
	case ClearHubFeature:
		DBG("ClearHubFeature: ");
		switch (wValue) {
		case C_HUB_OVER_CURRENT:
			DBG("C_HUB_OVER_CURRENT\n");
			spin_lock_irqsave(&isp116x->lock, flags);
			isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
			spin_unlock_irqrestore(&isp116x->lock, flags);
		case C_HUB_LOCAL_POWER:
			DBG("C_HUB_LOCAL_POWER\n");
			break;
		default:
			goto error;
		}
		break;
	case SetHubFeature:
		DBG("SetHubFeature: ");
		switch (wValue) {
		case C_HUB_OVER_CURRENT:
		case C_HUB_LOCAL_POWER:
			DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
			break;
		default:
			goto error;
		}
		break;
	case GetHubDescriptor:
		DBG("GetHubDescriptor\n");
		isp116x_hub_descriptor(isp116x,
				       (struct usb_hub_descriptor *)buf);
		break;
	case GetHubStatus:
		DBG("GetHubStatus\n");
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		*(__le32 *) buf = 0;
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		break;
	case GetPortStatus:
		DBG("GetPortStatus\n");
		if (!wIndex || wIndex > ports)
			goto error;
		tmp = isp116x->rhport[--wIndex];
		*(__le32 *) buf = cpu_to_le32(tmp);
		DBG("GetPortStatus: port[%d]  %08x\n", wIndex + 1, tmp);
		break;
	case ClearPortFeature:
		DBG("ClearPortFeature: ");
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;

		switch (wValue) {
		case USB_PORT_FEAT_ENABLE:
			DBG("USB_PORT_FEAT_ENABLE\n");
			tmp = RH_PS_CCS;
			break;
		case USB_PORT_FEAT_C_ENABLE:
			DBG("USB_PORT_FEAT_C_ENABLE\n");
			tmp = RH_PS_PESC;
			break;
		case USB_PORT_FEAT_SUSPEND:
			DBG("USB_PORT_FEAT_SUSPEND\n");
			tmp = RH_PS_POCI;
			break;
		case USB_PORT_FEAT_C_SUSPEND:
			DBG("USB_PORT_FEAT_C_SUSPEND\n");
			tmp = RH_PS_PSSC;
			break;
		case USB_PORT_FEAT_POWER:
			DBG("USB_PORT_FEAT_POWER\n");
			tmp = RH_PS_LSDA;
			break;
		case USB_PORT_FEAT_C_CONNECTION:
			DBG("USB_PORT_FEAT_C_CONNECTION\n");
			tmp = RH_PS_CSC;
			break;
		case USB_PORT_FEAT_C_OVER_CURRENT:
			DBG("USB_PORT_FEAT_C_OVER_CURRENT\n");
			tmp = RH_PS_OCIC;
			break;
		case USB_PORT_FEAT_C_RESET:
			DBG("USB_PORT_FEAT_C_RESET\n");
			tmp = RH_PS_PRSC;
			break;
		default:
			goto error;
		}
		spin_lock_irqsave(&isp116x->lock, flags);
		isp116x_write_reg32(isp116x, wIndex
				    ? HCRHPORT2 : HCRHPORT1, tmp);
		isp116x->rhport[wIndex] =
		    isp116x_read_reg32(isp116x, wIndex ? HCRHPORT2 : HCRHPORT1);
		spin_unlock_irqrestore(&isp116x->lock, flags);
		break;
	case SetPortFeature:
		DBG("SetPortFeature: ");
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			DBG("USB_PORT_FEAT_SUSPEND\n");
			spin_lock_irqsave(&isp116x->lock, flags);
			isp116x_write_reg32(isp116x, wIndex
					    ? HCRHPORT2 : HCRHPORT1, RH_PS_PSS);
			break;
		case USB_PORT_FEAT_POWER:
			DBG("USB_PORT_FEAT_POWER\n");
			spin_lock_irqsave(&isp116x->lock, flags);
			isp116x_write_reg32(isp116x, wIndex
					    ? HCRHPORT2 : HCRHPORT1, RH_PS_PPS);
			break;
		case USB_PORT_FEAT_RESET:
			DBG("USB_PORT_FEAT_RESET\n");
			root_port_reset(isp116x, wIndex);
			spin_lock_irqsave(&isp116x->lock, flags);
			break;
		default:
			goto error;
		}
		isp116x->rhport[wIndex] =
		    isp116x_read_reg32(isp116x, wIndex ? HCRHPORT2 : HCRHPORT1);
		spin_unlock_irqrestore(&isp116x->lock, flags);
		break;

	default:
	      error:
		/* "protocol stall" on error */
		DBG("PROTOCOL STALL\n");
		ret = -EPIPE;
	}
	return ret;
}

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

1142
#ifdef CONFIG_DEBUG_FS
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165

static void dump_irq(struct seq_file *s, char *label, u16 mask)
{
	seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask,
		   mask & HCuPINT_CLKRDY ? " clkrdy" : "",
		   mask & HCuPINT_SUSP ? " susp" : "",
		   mask & HCuPINT_OPR ? " opr" : "",
		   mask & HCuPINT_AIIEOT ? " eot" : "",
		   mask & HCuPINT_ATL ? " atl" : "",
		   mask & HCuPINT_SOF ? " sof" : "");
}

static void dump_int(struct seq_file *s, char *label, u32 mask)
{
	seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask,
		   mask & HCINT_MIE ? " MIE" : "",
		   mask & HCINT_RHSC ? " rhsc" : "",
		   mask & HCINT_FNO ? " fno" : "",
		   mask & HCINT_UE ? " ue" : "",
		   mask & HCINT_RD ? " rd" : "",
		   mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : "");
}

1166
static int isp116x_show_dbg(struct seq_file *s, void *unused)
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
{
	struct isp116x *isp116x = s->private;

	seq_printf(s, "%s\n%s version %s\n",
		   isp116x_to_hcd(isp116x)->product_desc, hcd_name,
		   DRIVER_VERSION);

	if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) {
		seq_printf(s, "HCD is suspended\n");
		return 0;
	}
	if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) {
		seq_printf(s, "HCD not running\n");
		return 0;
	}

	spin_lock_irq(&isp116x->lock);
	dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB));
	dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT));
	dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB));
	dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT));
1188
	isp116x_show_regs_seq(isp116x, s);
1189
1190
1191
1192
1193
1194
	spin_unlock_irq(&isp116x->lock);
	seq_printf(s, "\n");

	return 0;
}

1195
static int isp116x_open_seq(struct inode *inode, struct file *file)
1196
{
1197
	return single_open(file, isp116x_show_dbg, inode->i_private);
1198
1199
}

1200
static const struct file_operations isp116x_debug_fops = {
1201
	.open = isp116x_open_seq,
1202
1203
1204
1205
1206
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

1207
static int create_debug_file(struct isp116x *isp116x)
1208
{
1209
1210
1211
1212
1213
1214
	isp116x->dentry = debugfs_create_file(hcd_name,
					      S_IRUGO, NULL, isp116x,
					      &isp116x_debug_fops);
	if (!isp116x->dentry)
		return -ENOMEM;
	return 0;
1215
1216
1217
1218
}

static void remove_debug_file(struct isp116x *isp116x)
{
1219
	debugfs_remove(isp116x->dentry);
1220
1221
}

1222
1223
1224
1225
1226
1227
#else

#define	create_debug_file(d)	0
#define	remove_debug_file(d)	do{}while(0)

#endif				/* CONFIG_DEBUG_FS */
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
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1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261

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

/*
  Software reset - can be called from any contect.
*/
static int isp116x_sw_reset(struct isp116x *isp116x)
{
	int retries = 15;
	unsigned long flags;
	int ret = 0;

	spin_lock_irqsave(&isp116x->lock, flags);
	isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
	isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
	while (--retries) {
		/* It usually resets within 1 ms */
		mdelay(1);
		if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
			break;
	}
	if (!retries) {
		ERR("Software reset timeout\n");
		ret = -ETIME;
	}
	spin_unlock_irqrestore(&isp116x->lock, flags);
	return ret;
}

static int isp116x_reset(struct usb_hcd *hcd)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	unsigned long t;
	u16 clkrdy = 0;
1262
	int ret, timeout = 15 /* ms */ ;
1263

1264
	ret = isp116x_sw_reset(isp116x);
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
	if (ret)
		return ret;

	t = jiffies + msecs_to_jiffies(timeout);
	while (time_before_eq(jiffies, t)) {
		msleep(4);
		spin_lock_irq(&isp116x->lock);
		clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
		spin_unlock_irq(&isp116x->lock);
		if (clkrdy)
			break;
	}
	if (!clkrdy) {
1278
		ERR("Clock not ready after %dms\n", timeout);
1279
1280
		/* After sw_reset the clock won't report to be ready, if
		   H_WAKEUP pin is high. */
1281
		ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
		ret = -ENODEV;
	}
	return ret;
}

static void isp116x_stop(struct usb_hcd *hcd)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	unsigned long flags;
	u32 val;

	spin_lock_irqsave(&isp116x->lock, flags);
	isp116x_write_reg16(isp116x, HCuPINTENB, 0);

	/* Switch off ports' power, some devices don't come up
	   after next 'insmod' without this */
	val = isp116x_read_reg32(isp116x, HCRHDESCA);
	val &= ~(RH_A_NPS | RH_A_PSM);
	isp116x_write_reg32(isp116x, HCRHDESCA, val);
	isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
	spin_unlock_irqrestore(&isp116x->lock, flags);

1304
	isp116x_sw_reset(isp116x);
1305
1306
1307
1308
1309
1310
1311
1312
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1316
1317
1318
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1323
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1325
1326
1327
1328
1329
}

/*
  Configure the chip. The chip must be successfully reset by now.
*/
static int isp116x_start(struct usb_hcd *hcd)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	struct isp116x_platform_data *board = isp116x->board;
	u32 val;
	unsigned long flags;

	spin_lock_irqsave(&isp116x->lock, flags);

	/* clear interrupt status and disable all interrupt sources */
	isp116x_write_reg16(isp116x, HCuPINT, 0xff);
	isp116x_write_reg16(isp116x, HCuPINTENB, 0);

	val = isp116x_read_reg16(isp116x, HCCHIPID);
	if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
		ERR("Invalid chip ID %04x\n", val);
		spin_unlock_irqrestore(&isp116x->lock, flags);
		return -ENODEV;
	}

1330
1331
1332
	/* To be removed in future */
	hcd->uses_new_polling = 1;

1333
1334
1335
1336
1337
1338
1339
1340
	isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
	isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);

	/* ----- HW conf */
	val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
	if (board->sel15Kres)
		val |= HCHWCFG_15KRSEL;
	/* Remote wakeup won't work without working clock */
1341
	if (board->remote_wakeup_enable)
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
		val |= HCHWCFG_CLKNOTSTOP;
	if (board->oc_enable)
		val |= HCHWCFG_ANALOG_OC;
	if (board->int_act_high)
		val |= HCHWCFG_INT_POL;
	if (board->int_edge_triggered)
		val |= HCHWCFG_INT_TRIGGER;
	isp116x_write_reg16(isp116x, HCHWCFG, val);

	/* ----- Root hub conf */
1352
	val = (25 << 24) & RH_A_POTPGT;
1353
1354
1355
1356
	/* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
	   be always set. Yet, instead, we request individual port
	   power switching. */
	val |= RH_A_PSM;
1357
1358
	/* Report overcurrent per port */
	val |= RH_A_OCPM;
1359
1360
1361
1362
1363
1364
1365
1366
1367
	isp116x_write_reg32(isp116x, HCRHDESCA, val);
	isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);

	val = RH_B_PPCM;
	isp116x_write_reg32(isp116x, HCRHDESCB, val);
	isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);

	val = 0;
	if (board->remote_wakeup_enable) {
1368
1369
		if (!device_can_wakeup(hcd->self.controller))
			device_init_wakeup(hcd->self.controller, 1);
1370
1371
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1396
		val |= RH_HS_DRWE;
	}
	isp116x_write_reg32(isp116x, HCRHSTATUS, val);
	isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);

	isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);

	hcd->state = HC_STATE_RUNNING;

	/* Set up interrupts */
	isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE;
	if (board->remote_wakeup_enable)
		isp116x->intenb |= HCINT_RD;
	isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR;	/* | HCuPINT_SUSP; */
	isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb);
	isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);

	/* Go operational */
	val = HCCONTROL_USB_OPER;
	if (board->remote_wakeup_enable)
		val |= HCCONTROL_RWE;
	isp116x_write_reg32(isp116x, HCCONTROL, val);

	/* Disable ports to avoid race in device enumeration */
	isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
	isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);

1397
	isp116x_show_regs_log(isp116x);
1398
1399
1400
1401
	spin_unlock_irqrestore(&isp116x->lock, flags);
	return 0;
}

1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
#ifdef	CONFIG_PM

static int isp116x_bus_suspend(struct usb_hcd *hcd)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	unsigned long flags;
	u32 val;
	int ret = 0;

	spin_lock_irqsave(&isp116x->lock, flags);
	val = isp116x_read_reg32(isp116x, HCCONTROL);
1413

1414
1415
	switch (val & HCCONTROL_HCFS) {
	case HCCONTROL_USB_OPER:
1416
		spin_unlock_irqrestore(&isp116x->lock, flags);
1417
1418
		val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
		val |= HCCONTROL_USB_SUSPEND;
1419
		if (device_may_wakeup(&hcd->self.root_hub->dev))
1420
1421
			val |= HCCONTROL_RWE;
		/* Wait for usb transfers to finish */
1422
1423
		msleep(2);
		spin_lock_irqsave(&isp116x->lock, flags);
1424
		isp116x_write_reg32(isp116x, HCCONTROL, val);
1425
		spin_unlock_irqrestore(&isp116x->lock, flags);
1426
		/* Wait for devices to suspend */
1427
		msleep(5);
1428
1429
1430
1431
1432
1433
1434
		break;
	case HCCONTROL_USB_RESUME:
		isp116x_write_reg32(isp116x, HCCONTROL,
				    (val & ~HCCONTROL_HCFS) |
				    HCCONTROL_USB_RESET);
	case HCCONTROL_USB_RESET:
		ret = -EBUSY;
1435
1436
	default:		/* HCCONTROL_USB_SUSPEND */
		spin_unlock_irqrestore(&isp116x->lock, flags);
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
		break;
	}

	return ret;
}

static int isp116x_bus_resume(struct usb_hcd *hcd)
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	u32 val;

	msleep(5);
	spin_lock_irq(&isp116x->lock);

	val = isp116x_read_reg32(isp116x, HCCONTROL);
	switch (val & HCCONTROL_HCFS) {
	case HCCONTROL_USB_SUSPEND:
		val &= ~HCCONTROL_HCFS;
		val |= HCCONTROL_USB_RESUME;
		isp116x_write_reg32(isp116x, HCCONTROL, val);
	case HCCONTROL_USB_RESUME:
		break;
	case HCCONTROL_USB_OPER:
		spin_unlock_irq(&isp116x->lock);
		/* Without setting power_state here the
		   SUSPENDED state won't be removed from
		   sysfs/usbN/power.state as a response to remote
		   wakeup. Maybe in the future. */
		hcd->self.root_hub->dev.power.power_state = PMSG_ON;
		return 0;
	default:
		/* HCCONTROL_USB_RESET: this may happen, when during
		   suspension the HC lost power. Reinitialize completely */
		spin_unlock_irq(&isp116x->lock);
		DBG("Chip has been reset while suspended. Reinit from scratch.\n");
		isp116x_reset(hcd);
		isp116x_start(hcd);
		isp116x_hub_control(hcd, SetPortFeature,
				    USB_PORT_FEAT_POWER, 1, NULL, 0);
		if ((isp116x->rhdesca & RH_A_NDP) == 2)
			isp116x_hub_control(hcd, SetPortFeature,
					    USB_PORT_FEAT_POWER, 2, NULL, 0);
		hcd->self.root_hub->dev.power.power_state = PMSG_ON;
		return 0;
	}

	val = isp116x->rhdesca & RH_A_NDP;
	while (val--) {
		u32 stat =
		    isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1);
		/* force global, not selective, resume */
		if (!(stat & RH_PS_PSS))
			continue;
		DBG("%s: Resuming port %d\n", __func__, val);
		isp116x_write_reg32(isp116x, RH_PS_POCI, val
				    ? HCRHPORT2 : HCRHPORT1);
	}
	spin_unlock_irq(&isp116x->lock);

	hcd->state = HC_STATE_RESUMING;
	msleep(20);

	/* Go operational */
	spin_lock_irq(&isp116x->lock);
	val = isp116x_read_reg32(isp116x, HCCONTROL);
	isp116x_write_reg32(isp116x, HCCONTROL,
			    (val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER);
	spin_unlock_irq(&isp116x->lock);
	/* see analogous comment above */
	hcd->self.root_hub->dev.power.power_state = PMSG_ON;
	hcd->state = HC_STATE_RUNNING;

	return 0;
}

#else

#define	isp116x_bus_suspend	NULL
#define	isp116x_bus_resume	NULL

#endif
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538

static struct hc_driver isp116x_hc_driver = {
	.description = hcd_name,
	.product_desc = "ISP116x Host Controller",
	.hcd_priv_size = sizeof(struct isp116x),

	.irq = isp116x_irq,
	.flags = HCD_USB11,

	.reset = isp116x_reset,
	.start = isp116x_start,
	.stop = isp116x_stop,

	.urb_enqueue = isp116x_urb_enqueue,
	.urb_dequeue = isp116x_urb_dequeue,
	.endpoint_disable = isp116x_endpoint_disable,

	.get_frame_number = isp116x_get_frame,

	.hub_status_data = isp116x_hub_status_data,
	.hub_control = isp116x_hub_control,
1539
1540
	.bus_suspend = isp116x_bus_suspend,
	.bus_resume = isp116x_bus_resume,
1541
1542
1543
1544
};

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

1545
static int isp116x_remove(struct platform_device *pdev)
1546
{
1547
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
1548
	struct isp116x *isp116x;
1549
1550
	struct resource *res;

1551
	if (!hcd)
1552
1553
		return 0;
	isp116x = hcd_to_isp116x(hcd);
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
	remove_debug_file(isp116x);
	usb_remove_hcd(hcd);

	iounmap(isp116x->data_reg);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	release_mem_region(res->start, 2);
	iounmap(isp116x->addr_reg);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, 2);

	usb_put_hcd(hcd);
	return 0;
}

#define resource_len(r) (((r)->end - (r)->start) + 1)

1570
static int __devinit isp116x_probe(struct platform_device *pdev)
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
{
	struct usb_hcd *hcd;
	struct isp116x *isp116x;
	struct resource *addr, *data;
	void __iomem *addr_reg;
	void __iomem *data_reg;
	int irq;
	int ret = 0;

	if (pdev->num_resources < 3) {
		ret = -ENODEV;
		goto err1;
	}

	data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	irq = platform_get_irq(pdev, 0);
	if (!addr || !data || irq < 0) {
		ret = -ENODEV;
		goto err1;
	}

1593
	if (pdev->dev.dma_mask) {
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
		DBG("DMA not supported\n");
		ret = -EINVAL;
		goto err1;
	}

	if (!request_mem_region(addr->start, 2, hcd_name)) {
		ret = -EBUSY;
		goto err1;
	}
	addr_reg = ioremap(addr->start, resource_len(addr));
	if (addr_reg == NULL) {
		ret = -ENOMEM;
		goto err2;
	}
	if (!request_mem_region(data->start, 2, hcd_name)) {
		ret = -EBUSY;
		goto err3;
	}
	data_reg = ioremap(data->start, resource_len(data));
	if (data_reg == NULL) {
		ret = -ENOMEM;
		goto err4;
	}

	/* allocate and initialize hcd */
1619
	hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, pdev->dev.bus_id);
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
	if (!hcd) {
		ret = -ENOMEM;
		goto err5;
	}
	/* this rsrc_start is bogus */
	hcd->rsrc_start = addr->start;
	isp116x = hcd_to_isp116x(hcd);
	isp116x->data_reg = data_reg;
	isp116x->addr_reg = addr_reg;
	spin_lock_init(&isp116x->lock);
	INIT_LIST_HEAD(&isp116x->async);
1631
	isp116x->board = pdev->dev.platform_data;
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645

	if (!isp116x->board) {
		ERR("Platform data structure not initialized\n");
		ret = -ENODEV;
		goto err6;
	}
	if (isp116x_check_platform_delay(isp116x)) {
		ERR("USE_PLATFORM_DELAY defined, but delay function not "
		    "implemented.\n");
		ERR("See comments in drivers/usb/host/isp116x-hcd.c\n");
		ret = -ENODEV;
		goto err6;
	}

1646
	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
1647
	if (ret)
1648
1649
		goto err6;

1650
1651
1652
1653
1654
1655
	ret = create_debug_file(isp116x);
	if (ret) {
		ERR("Couldn't create debugfs entry\n");
		goto err7;
	}

1656
1657
	return 0;

1658
1659
      err7:
	usb_remove_hcd(hcd);
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
      err6:
	usb_put_hcd(hcd);
      err5:
	iounmap(data_reg);
      err4:
	release_mem_region(data->start, 2);
      err3:
	iounmap(addr_reg);
      err2:
	release_mem_region(addr->start, 2);
      err1:
	ERR("init error, %d\n", ret);
	return ret;
}

#ifdef	CONFIG_PM
/*
  Suspend of platform device
*/
1679
static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
1680
{
1681
	VDBG("%s: state %x\n", __func__, state.event);
1682
	dev->dev.power.power_state = state;
1683
	return 0;
1684
1685
1686
1687
1688
}

/*
  Resume platform device
*/
1689
static int isp116x_resume(struct platform_device *dev)
1690
{
1691
	VDBG("%s:  state %x\n", __func__, dev->power.power_state.event);
1692
	dev->dev.power.power_state = PMSG_ON;
1693
	return 0;
1694
1695
1696
1697
1698
1699
1700
1701
1702
}

#else

#define	isp116x_suspend    NULL
#define	isp116x_resume     NULL

#endif

1703
static struct platform_driver isp116x_driver = {
1704
1705
1706
1707
	.probe = isp116x_probe,
	.remove = isp116x_remove,
	.suspend = isp116x_suspend,
	.resume = isp116x_resume,
1708
1709
1710
	.driver = {
		   .name = (char *)hcd_name,
		   },
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
};

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

static int __init isp116x_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1721
	return platform_driver_register(&isp116x_driver);
1722
1723
1724
1725
1726
1727
}

module_init(isp116x_init);

static void __exit isp116x_cleanup(void)
{
1728
	platform_driver_unregister(&isp116x_driver);
1729
1730
1731
}

module_exit(isp116x_cleanup);