isp116x-hcd.c 43.6 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>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/usb/isp116x.h>
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#include <linux/usb/hcd.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 "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;

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	/* buffer is already in 'usb data order', which is LE. */
	/* When reading buffer as u16, we have to take care byte order */
	/* doesn't get mixed up */

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	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 */
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		for (; len > 1; len -= 2) {
			/* Keep byte order ! */
			isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++));
		}

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		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;

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	/* buffer is already in 'usb data order', which is LE. */
	/* When reading buffer as u16, we have to take care byte order */
	/* doesn't get mixed up */

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	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;
		}
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		if (len)
			*dp = 0xff & isp116x_read_data16(isp116x);
	} else {
		/* aligned */
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		for (; len > 1; len -= 2) {
			/* Keep byte order! */
			*dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x));
		}

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		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,
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			   struct urb *urb, int status)
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__releases(isp116x->lock) __acquires(isp116x->lock)
{
	unsigned i;

	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);
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	usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, status);
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	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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			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:
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		if (status != -EINPROGRESS || urb->unlinked)
			finish_request(isp116x, ep, urb, status);
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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;
617
		}
618 619 620 621 622 623
		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);
624 625
		if (intstat & HCINT_RD) {
			DBG("---- remote wakeup\n");
D
David Brownell 已提交
626
			usb_hcd_resume_root_hub(hcd);
627 628 629 630 631 632 633 634 635 636
		}
		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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Olav Kongas 已提交
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      done:
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680
	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,
681
			       struct urb *urb,
A
Al Viro 已提交
682
			       gfp_t mem_flags)
683 684 685 686 687 688 689
{
	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);
690
	struct usb_host_endpoint *hep = urb->ep;
691 692 693 694 695 696 697 698 699 700 701 702 703 704
	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) {
705
		ep = kzalloc(sizeof *ep, mem_flags);
706 707 708 709 710 711
		if (!ep)
			return -ENOMEM;
	}

	spin_lock_irqsave(&isp116x->lock, flags);
	if (!HC_IS_RUNNING(hcd->state)) {
O
Olav Kongas 已提交
712
		kfree(ep);
713
		ret = -ENODEV;
714 715 716 717 718 719
		goto fail_not_linked;
	}
	ret = usb_hcd_link_urb_to_ep(hcd, urb);
	if (ret) {
		kfree(ep);
		goto fail_not_linked;
720 721 722 723 724 725
	}

	if (hep->hcpriv)
		ep = hep->hcpriv;
	else {
		INIT_LIST_HEAD(&ep->schedule);
726
		ep->udev = udev;
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775
		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;
776
		ep->length = min_t(u32, ep->maxpacket,
777 778 779 780 781 782
				 urb->transfer_buffer_length);

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

783
		ep->branch = ret = balance(isp116x, ep->period, ep->load);
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825
		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:
826 827 828
	if (ret)
		usb_hcd_unlink_urb_from_ep(hcd, urb);
      fail_not_linked:
829 830 831 832 833 834 835
	spin_unlock_irqrestore(&isp116x->lock, flags);
	return ret;
}

/*
   Dequeue URBs.
*/
836 837
static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
		int status)
838 839 840 841 842
{
	struct isp116x *isp116x = hcd_to_isp116x(hcd);
	struct usb_host_endpoint *hep;
	struct isp116x_ep *ep, *ep_act;
	unsigned long flags;
843
	int rc;
844 845

	spin_lock_irqsave(&isp116x->lock, flags);
846 847 848 849
	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
	if (rc)
		goto done;

850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866
	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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Alan Stern 已提交
867
		finish_request(isp116x, ep, urb, status);
868
 done:
869
	spin_unlock_irqrestore(&isp116x->lock, flags);
870
	return rc;
871 872 873 874 875 876
}

static void isp116x_endpoint_disable(struct usb_hcd *hcd,
				     struct usb_host_endpoint *hep)
{
	int i;
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Olav Kongas 已提交
877
	struct isp116x_ep *ep = hep->hcpriv;
878 879 880 881 882 883 884 885

	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))
886
		WARNING("ep %p not empty?\n", ep);
887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910

	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;
911
	unsigned long flags;
912 913 914 915

	if (!HC_IS_RUNNING(hcd->state))
		return -ESHUTDOWN;

916 917 918 919
	/* Report no status change now, if we are scheduled to be
	   called later */
	if (timer_pending(&hcd->rh_timer))
		return 0;
920

921 922 923
	ports = isp116x->rhdesca & RH_A_NDP;
	spin_lock_irqsave(&isp116x->lock, flags);
	isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
924 925 926 927 928 929
	if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC))
		buf[0] = changed = 1;
	else
		buf[0] = 0;

	for (i = 0; i < ports; i++) {
930
		u32 status = isp116x_read_reg32(isp116x, i ? HCRHPORT2 : HCRHPORT1);
931 932 933 934 935 936 937

		if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
			      | RH_PS_OCIC | RH_PS_PRSC)) {
			changed = 1;
			buf[0] |= 1 << (i + 1);
		}
	}
938
	spin_unlock_irqrestore(&isp116x->lock, flags);
939 940 941 942 943 944 945 946 947 948 949 950 951
	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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Olav Kongas 已提交
952
	desc->wHubCharacteristics = cpu_to_le16((u16) ((reg >> 8) & 0x1f));
953 954
	desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff);
	/* two bitmaps:  ports removable, and legacy PortPwrCtrlMask */
O
Olav Kongas 已提交
955
	desc->bitmap[0] = 0;
956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
	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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Olav Kongas 已提交
1043
		*(__le32 *) buf = 0;
1044 1045 1046 1047 1048
		break;
	case GetPortStatus:
		DBG("GetPortStatus\n");
		if (!wIndex || wIndex > ports)
			goto error;
1049 1050 1051
		spin_lock_irqsave(&isp116x->lock, flags);
		tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
		spin_unlock_irqrestore(&isp116x->lock, flags);
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
		*(__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);
		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);
1113
			spin_unlock_irqrestore(&isp116x->lock, flags);
1114 1115 1116 1117 1118 1119
			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);
1120
			spin_unlock_irqrestore(&isp116x->lock, flags);
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
			break;
		case USB_PORT_FEAT_RESET:
			DBG("USB_PORT_FEAT_RESET\n");
			root_port_reset(isp116x, wIndex);
			break;
		default:
			goto error;
		}
		break;

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

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

O
Olav Kongas 已提交
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" : "");
}

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Olav Kongas 已提交
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));
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	isp116x_show_regs_seq(isp116x, s);
1189 1190 1191 1192 1193 1194
	spin_unlock_irq(&isp116x->lock);
	seq_printf(s, "\n");

	return 0;
}

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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 = {
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	.open = isp116x_open_seq,
1202 1203 1204 1205 1206
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

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static int create_debug_file(struct isp116x *isp116x)
1208
{
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	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)
{
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1219
	debugfs_remove(isp116x->dentry);
1220 1221
}

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#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 1243 1244 1245 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;
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	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) {
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		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 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 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 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 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);

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

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#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

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1414 1415
	switch (val & HCCONTROL_HCFS) {
	case HCCONTROL_USB_OPER:
1416
		spin_unlock_irqrestore(&isp116x->lock, flags);
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1417 1418
		val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
		val |= HCCONTROL_USB_SUSPEND;
1419
		if (hcd->self.root_hub->do_remote_wakeup)
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1420 1421
			val |= HCCONTROL_RWE;
		/* Wait for usb transfers to finish */
1422 1423
		msleep(2);
		spin_lock_irqsave(&isp116x->lock, flags);
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1424
		isp116x_write_reg32(isp116x, HCCONTROL, val);
1425
		spin_unlock_irqrestore(&isp116x->lock, flags);
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1426
		/* Wait for devices to suspend */
1427
		msleep(5);
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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);
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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
		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);
		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);
		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);
	hcd->state = HC_STATE_RUNNING;

	return 0;
}

#else

#define	isp116x_bus_suspend	NULL
#define	isp116x_bus_resume	NULL

#endif
1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530

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,
1531 1532
	.bus_suspend = isp116x_bus_suspend,
	.bus_resume = isp116x_bus_resume,
1533 1534 1535 1536
};

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

1537
static int isp116x_remove(struct platform_device *pdev)
1538
{
1539
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
1540
	struct isp116x *isp116x;
1541 1542
	struct resource *res;

1543
	if (!hcd)
1544 1545
		return 0;
	isp116x = hcd_to_isp116x(hcd);
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559
	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;
}

1560
static int __devinit isp116x_probe(struct platform_device *pdev)
1561 1562 1563
{
	struct usb_hcd *hcd;
	struct isp116x *isp116x;
1564
	struct resource *addr, *data, *ires;
1565 1566 1567 1568
	void __iomem *addr_reg;
	void __iomem *data_reg;
	int irq;
	int ret = 0;
1569
	unsigned long irqflags;
1570 1571 1572 1573 1574 1575 1576 1577

	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);
1578 1579 1580
	ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (!addr || !data || !ires) {
1581 1582 1583 1584
		ret = -ENODEV;
		goto err1;
	}

1585 1586 1587
	irq = ires->start;
	irqflags = ires->flags & IRQF_TRIGGER_MASK;

1588
	if (pdev->dev.dma_mask) {
1589 1590 1591 1592 1593 1594 1595 1596 1597
		DBG("DMA not supported\n");
		ret = -EINVAL;
		goto err1;
	}

	if (!request_mem_region(addr->start, 2, hcd_name)) {
		ret = -EBUSY;
		goto err1;
	}
1598
	addr_reg = ioremap(addr->start, resource_size(addr));
1599 1600 1601 1602 1603 1604 1605 1606
	if (addr_reg == NULL) {
		ret = -ENOMEM;
		goto err2;
	}
	if (!request_mem_region(data->start, 2, hcd_name)) {
		ret = -EBUSY;
		goto err3;
	}
1607
	data_reg = ioremap(data->start, resource_size(data));
1608 1609 1610 1611 1612 1613
	if (data_reg == NULL) {
		ret = -ENOMEM;
		goto err4;
	}

	/* allocate and initialize hcd */
1614
	hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev));
1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
	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);
1626
	isp116x->board = pdev->dev.platform_data;
1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640

	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;
	}

1641
	ret = usb_add_hcd(hcd, irq, irqflags | IRQF_DISABLED);
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Olav Kongas 已提交
1642
	if (ret)
1643 1644
		goto err6;

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1645 1646 1647 1648 1649 1650
	ret = create_debug_file(isp116x);
	if (ret) {
		ERR("Couldn't create debugfs entry\n");
		goto err7;
	}

1651 1652
	return 0;

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1653 1654
      err7:
	usb_remove_hcd(hcd);
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673
      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
*/
1674
static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
1675
{
O
Olav Kongas 已提交
1676 1677
	VDBG("%s: state %x\n", __func__, state.event);
	return 0;
1678 1679 1680 1681 1682
}

/*
  Resume platform device
*/
1683
static int isp116x_resume(struct platform_device *dev)
1684
{
A
Alan Stern 已提交
1685
	VDBG("%s\n", __func__);
O
Olav Kongas 已提交
1686
	return 0;
1687 1688 1689 1690 1691 1692 1693 1694 1695
}

#else

#define	isp116x_suspend    NULL
#define	isp116x_resume     NULL

#endif

1696 1697 1698
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:isp116x-hcd");

1699
static struct platform_driver isp116x_driver = {
1700 1701 1702 1703
	.probe = isp116x_probe,
	.remove = isp116x_remove,
	.suspend = isp116x_suspend,
	.resume = isp116x_resume,
1704
	.driver = {
1705 1706 1707
		.name = (char *)hcd_name,
		.owner	= THIS_MODULE,
	},
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717
};

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

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

	INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1718
	return platform_driver_register(&isp116x_driver);
1719 1720 1721 1722 1723 1724
}

module_init(isp116x_init);

static void __exit isp116x_cleanup(void)
{
1725
	platform_driver_unregister(&isp116x_driver);
1726 1727 1728
}

module_exit(isp116x_cleanup);