[deliverable/linux.git] / drivers / usb / host / uhci-debug.c

/*
 * UHCI-specific debugging code. Invaluable when something
 * goes wrong, but don't get in my face.
 *
 * Kernel visible pointers are surrounded in []s and bus
 * visible pointers are surrounded in ()s
 *
 * (C) Copyright 1999 Linus Torvalds
 * (C) Copyright 1999-2001 Johannes Erdfelt
 */

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <asm/io.h>

#include "uhci-hcd.h"

#define EXTRA_SPACE	1024

static struct dentry *uhci_debugfs_root;

#ifdef DEBUG

/* Handle REALLY large printks so we don't overflow buffers */
static void lprintk(char *buf)
{
	char *p;

	/* Just write one line at a time */
	while (buf) {
		p = strchr(buf, '\n');
		if (p)
			*p = 0;
		printk(KERN_DEBUG "%s\n", buf);
		buf = p;
		if (buf)
			buf++;
	}
}

static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
			int len, int space)
{
	char *out = buf;
	char *spid;
	u32 status, token;

	status = td_status(uhci, td);
	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
		hc32_to_cpu(uhci, td->link));
	out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
		((status >> 27) & 3),
		(status & TD_CTRL_SPD) ?      "SPD " : "",
		(status & TD_CTRL_LS) ?       "LS " : "",
		(status & TD_CTRL_IOC) ?      "IOC " : "",
		(status & TD_CTRL_ACTIVE) ?   "Active " : "",
		(status & TD_CTRL_STALLED) ?  "Stalled " : "",
		(status & TD_CTRL_DBUFERR) ?  "DataBufErr " : "",
		(status & TD_CTRL_BABBLE) ?   "Babble " : "",
		(status & TD_CTRL_NAK) ?      "NAK " : "",
		(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
		(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
		status & 0x7ff);
	if (out - buf > len)
		goto done;

	token = td_token(uhci, td);
	switch (uhci_packetid(token)) {
		case USB_PID_SETUP:
			spid = "SETUP";
			break;
		case USB_PID_OUT:
			spid = "OUT";
			break;
		case USB_PID_IN:
			spid = "IN";
			break;
		default:
			spid = "?";
			break;
	}

	out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
		token >> 21,
		((token >> 19) & 1),
		(token >> 15) & 15,
		(token >> 8) & 127,
		(token & 0xff),
		spid);
	out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));

done:
	if (out - buf > len)
		out += sprintf(out, " ...\n");
	return out - buf;
}

static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
			char *buf, int len, int space)
{
	char *out = buf;
	struct uhci_td *td;
	int i, nactive, ninactive;
	char *ptype;


	out += sprintf(out, "urb_priv [%p] ", urbp);
	out += sprintf(out, "urb [%p] ", urbp->urb);
	out += sprintf(out, "qh [%p] ", urbp->qh);
	out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
	out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
			(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
	if (out - buf > len)
		goto done;

	switch (usb_pipetype(urbp->urb->pipe)) {
	case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
	case PIPE_INTERRUPT: ptype = "INT"; break;
	case PIPE_BULK: ptype = "BLK"; break;
	default:
	case PIPE_CONTROL: ptype = "CTL"; break;
	}

	out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
	out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
			(urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
				"-8" : ""));

	if (urbp->urb->unlinked)
		out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
	out += sprintf(out, "\n");

	if (out - buf > len)
		goto done;

	i = nactive = ninactive = 0;
	list_for_each_entry(td, &urbp->td_list, list) {
		if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
				(++i <= 10 || debug > 2)) {
			out += sprintf(out, "%*s%d: ", space + 2, "", i);
			out += uhci_show_td(uhci, td, out,
					len - (out - buf), 0);
			if (out - buf > len)
				goto tail;
		} else {
			if (td_status(uhci, td) & TD_CTRL_ACTIVE)
				++nactive;
			else
				++ninactive;
		}
	}
	if (nactive + ninactive > 0)
		out += sprintf(out,
				"%*s[skipped %d inactive and %d active TDs]\n",
				space, "", ninactive, nactive);
done:
	if (out - buf > len)
		out += sprintf(out, " ...\n");
tail:
	return out - buf;
}

static int uhci_show_qh(struct uhci_hcd *uhci,
		struct uhci_qh *qh, char *buf, int len, int space)
{
	char *out = buf;
	int i, nurbs;
	__hc32 element = qh_element(qh);
	char *qtype;

	switch (qh->type) {
	case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
	case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
	case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
	case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
	default: qtype = "Skel" ; break;
	}

	out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
			space, "", qh, qtype,
			hc32_to_cpu(uhci, qh->link),
			hc32_to_cpu(uhci, element));
	if (qh->type == USB_ENDPOINT_XFER_ISOC)
		out += sprintf(out,
				"%*s    period %d phase %d load %d us, frame %x desc [%p]\n",
				space, "", qh->period, qh->phase, qh->load,
				qh->iso_frame, qh->iso_packet_desc);
	else if (qh->type == USB_ENDPOINT_XFER_INT)
		out += sprintf(out, "%*s    period %d phase %d load %d us\n",
				space, "", qh->period, qh->phase, qh->load);
	if (out - buf > len)
		goto done;

	if (element & UHCI_PTR_QH(uhci))
		out += sprintf(out, "%*s  Element points to QH (bug?)\n", space, "");

	if (element & UHCI_PTR_DEPTH(uhci))
		out += sprintf(out, "%*s  Depth traverse\n", space, "");

	if (element & cpu_to_hc32(uhci, 8))
		out += sprintf(out, "%*s  Bit 3 set (bug?)\n", space, "");

	if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci))))
		out += sprintf(out, "%*s  Element is NULL (bug?)\n", space, "");

	if (out - buf > len)
		goto done;

	if (list_empty(&qh->queue)) {
		out += sprintf(out, "%*s  queue is empty\n", space, "");
		if (qh == uhci->skel_async_qh) {
			out += uhci_show_td(uhci, uhci->term_td, out,
					len - (out - buf), 0);
			if (out - buf > len)
				goto tail;
		}
	} else {
		struct urb_priv *urbp = list_entry(qh->queue.next,
				struct urb_priv, node);
		struct uhci_td *td = list_entry(urbp->td_list.next,
				struct uhci_td, list);

		if (element != LINK_TO_TD(uhci, td))
			out += sprintf(out, "%*s Element != First TD\n",
					space, "");
		i = nurbs = 0;
		list_for_each_entry(urbp, &qh->queue, node) {
			if (++i <= 10) {
				out += uhci_show_urbp(uhci, urbp, out,
						len - (out - buf), space + 2);
				if (out - buf > len)
					goto tail;
			}
			else
				++nurbs;
		}
		if (nurbs > 0)
			out += sprintf(out, "%*s Skipped %d URBs\n",
					space, "", nurbs);
	}

	if (out - buf > len)
		goto done;

	if (qh->dummy_td) {
		out += sprintf(out, "%*s  Dummy TD\n", space, "");
		out += uhci_show_td(uhci, qh->dummy_td, out,
				len - (out - buf), 0);
		if (out - buf > len)
			goto tail;
	}

done:
	if (out - buf > len)
		out += sprintf(out, " ...\n");
tail:
	return out - buf;
}

static int uhci_show_sc(int port, unsigned short status, char *buf)
{
	return sprintf(buf, "  stat%d     =     %04x  %s%s%s%s%s%s%s%s%s%s\n",
		port,
		status,
		(status & USBPORTSC_SUSP) ?	" Suspend" : "",
		(status & USBPORTSC_OCC) ?	" OverCurrentChange" : "",
		(status & USBPORTSC_OC) ?	" OverCurrent" : "",
		(status & USBPORTSC_PR) ?	" Reset" : "",
		(status & USBPORTSC_LSDA) ?	" LowSpeed" : "",
		(status & USBPORTSC_RD) ?	" ResumeDetect" : "",
		(status & USBPORTSC_PEC) ?	" EnableChange" : "",
		(status & USBPORTSC_PE) ?	" Enabled" : "",
		(status & USBPORTSC_CSC) ?	" ConnectChange" : "",
		(status & USBPORTSC_CCS) ?	" Connected" : "");
}

static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf)
{
	char *rh_state;

	switch (uhci->rh_state) {
	    case UHCI_RH_RESET:
		rh_state = "reset";		break;
	    case UHCI_RH_SUSPENDED:
		rh_state = "suspended";		break;
	    case UHCI_RH_AUTO_STOPPED:
		rh_state = "auto-stopped";	break;
	    case UHCI_RH_RESUMING:
		rh_state = "resuming";		break;
	    case UHCI_RH_SUSPENDING:
		rh_state = "suspending";	break;
	    case UHCI_RH_RUNNING:
		rh_state = "running";		break;
	    case UHCI_RH_RUNNING_NODEVS:
		rh_state = "running, no devs";	break;
	    default:
		rh_state = "?";			break;
	}
	return sprintf(buf, "Root-hub state: %s   FSBR: %d\n",
			rh_state, uhci->fsbr_is_on);
}

static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
{
	char *out = buf;
	unsigned short usbcmd, usbstat, usbint, usbfrnum;
	unsigned int flbaseadd;
	unsigned char sof;
	unsigned short portsc1, portsc2;


	usbcmd    = uhci_readw(uhci, 0);
	usbstat   = uhci_readw(uhci, 2);
	usbint    = uhci_readw(uhci, 4);
	usbfrnum  = uhci_readw(uhci, 6);
	flbaseadd = uhci_readl(uhci, 8);
	sof       = uhci_readb(uhci, 12);
	portsc1   = uhci_readw(uhci, 16);
	portsc2   = uhci_readw(uhci, 18);

	out += sprintf(out, "  usbcmd    =     %04x   %s%s%s%s%s%s%s%s\n",
		usbcmd,
		(usbcmd & USBCMD_MAXP) ?    "Maxp64 " : "Maxp32 ",
		(usbcmd & USBCMD_CF) ?      "CF " : "",
		(usbcmd & USBCMD_SWDBG) ?   "SWDBG " : "",
		(usbcmd & USBCMD_FGR) ?     "FGR " : "",
		(usbcmd & USBCMD_EGSM) ?    "EGSM " : "",
		(usbcmd & USBCMD_GRESET) ?  "GRESET " : "",
		(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
		(usbcmd & USBCMD_RS) ?      "RS " : "");
	if (out - buf > len)
		goto done;

	out += sprintf(out, "  usbstat   =     %04x   %s%s%s%s%s%s\n",
		usbstat,
		(usbstat & USBSTS_HCH) ?    "HCHalted " : "",
		(usbstat & USBSTS_HCPE) ?   "HostControllerProcessError " : "",
		(usbstat & USBSTS_HSE) ?    "HostSystemError " : "",
		(usbstat & USBSTS_RD) ?     "ResumeDetect " : "",
		(usbstat & USBSTS_ERROR) ?  "USBError " : "",
		(usbstat & USBSTS_USBINT) ? "USBINT " : "");
	if (out - buf > len)
		goto done;

	out += sprintf(out, "  usbint    =     %04x\n", usbint);
	out += sprintf(out, "  usbfrnum  =   (%d)%03x\n", (usbfrnum >> 10) & 1,
		0xfff & (4*(unsigned int)usbfrnum));
	out += sprintf(out, "  flbaseadd = %08x\n", flbaseadd);
	out += sprintf(out, "  sof       =       %02x\n", sof);
	if (out - buf > len)
		goto done;

	out += uhci_show_sc(1, portsc1, out);
	if (out - buf > len)
		goto done;

	out += uhci_show_sc(2, portsc2, out);
	if (out - buf > len)
		goto done;

	out += sprintf(out,
			"Most recent frame: %x (%d)   Last ISO frame: %x (%d)\n",
			uhci->frame_number, uhci->frame_number & 1023,
			uhci->last_iso_frame, uhci->last_iso_frame & 1023);

done:
	if (out - buf > len)
		out += sprintf(out, " ...\n");
	return out - buf;
}

static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
{
	char *out = buf;
	int i, j;
	struct uhci_qh *qh;
	struct uhci_td *td;
	struct list_head *tmp, *head;
	int nframes, nerrs;
	__hc32 link;
	__hc32 fsbr_link;

	static const char * const qh_names[] = {
		"unlink", "iso", "int128", "int64", "int32", "int16",
		"int8", "int4", "int2", "async", "term"
	};

	out += uhci_show_root_hub_state(uhci, out);
	if (out - buf > len)
		goto done;
	out += sprintf(out, "HC status\n");
	out += uhci_show_status(uhci, out, len - (out - buf));
	if (out - buf > len)
		goto tail;

	out += sprintf(out, "Periodic load table\n");
	for (i = 0; i < MAX_PHASE; ++i) {
		out += sprintf(out, "\t%d", uhci->load[i]);
		if (i % 8 == 7)
			*out++ = '\n';
	}
	out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
			uhci->total_load,
			uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
			uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
	if (debug <= 1)
		goto tail;

	out += sprintf(out, "Frame List\n");
	nframes = 10;
	nerrs = 0;
	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
		__hc32 qh_dma;

		if (out - buf > len)
			goto done;
		j = 0;
		td = uhci->frame_cpu[i];
		link = uhci->frame[i];
		if (!td)
			goto check_link;

		if (nframes > 0) {
			out += sprintf(out, "- Frame %d -> (%08x)\n",
					i, hc32_to_cpu(uhci, link));
			j = 1;
		}

		head = &td->fl_list;
		tmp = head;
		do {
			td = list_entry(tmp, struct uhci_td, fl_list);
			tmp = tmp->next;
			if (link != LINK_TO_TD(uhci, td)) {
				if (nframes > 0) {
					out += sprintf(out,
						"    link does not match list entry!\n");
					if (out - buf > len)
						goto done;
				} else
					++nerrs;
			}
			if (nframes > 0) {
				out += uhci_show_td(uhci, td, out,
						len - (out - buf), 4);
				if (out - buf > len)
					goto tail;
			}
			link = td->link;
		} while (tmp != head);

check_link:
		qh_dma = uhci_frame_skel_link(uhci, i);
		if (link != qh_dma) {
			if (nframes > 0) {
				if (!j) {
					out += sprintf(out,
						"- Frame %d -> (%08x)\n",
						i, hc32_to_cpu(uhci, link));
					j = 1;
				}
				out += sprintf(out,
					"   link does not match QH (%08x)!\n",
					hc32_to_cpu(uhci, qh_dma));
				if (out - buf > len)
					goto done;
			} else
				++nerrs;
		}
		nframes -= j;
	}
	if (nerrs > 0)
		out += sprintf(out, "Skipped %d bad links\n", nerrs);

	out += sprintf(out, "Skeleton QHs\n");

	if (out - buf > len)
		goto done;

	fsbr_link = 0;
	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
		int cnt = 0;

		qh = uhci->skelqh[i];
		out += sprintf(out, "- skel_%s_qh\n", qh_names[i]);
		out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
		if (out - buf > len)
			goto tail;

		/* Last QH is the Terminating QH, it's different */
		if (i == SKEL_TERM) {
			if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) {
				out += sprintf(out,
					"    skel_term_qh element is not set to term_td!\n");
				if (out - buf > len)
					goto done;
			}
			link = fsbr_link;
			if (!link)
				link = LINK_TO_QH(uhci, uhci->skel_term_qh);
			goto check_qh_link;
		}

		head = &qh->node;
		tmp = head->next;

		while (tmp != head) {
			qh = list_entry(tmp, struct uhci_qh, node);
			tmp = tmp->next;
			if (++cnt <= 10) {
				out += uhci_show_qh(uhci, qh, out,
						len - (out - buf), 4);
				if (out - buf > len)
					goto tail;
			}
			if (!fsbr_link && qh->skel >= SKEL_FSBR)
				fsbr_link = LINK_TO_QH(uhci, qh);
		}
		if ((cnt -= 10) > 0)
			out += sprintf(out, "    Skipped %d QHs\n", cnt);

		link = UHCI_PTR_TERM(uhci);
		if (i <= SKEL_ISO)
			;
		else if (i < SKEL_ASYNC)
			link = LINK_TO_QH(uhci, uhci->skel_async_qh);
		else if (!uhci->fsbr_is_on)
			;
		else
			link = LINK_TO_QH(uhci, uhci->skel_term_qh);
check_qh_link:
		if (qh->link != link)
			out += sprintf(out,
				"    last QH not linked to next skeleton!\n");

		if (out - buf > len)
			goto done;
	}

done:
	if (out - buf > len)
		out += sprintf(out, " ...\n");
tail:
	return out - buf;
}

#ifdef CONFIG_DEBUG_FS

#define MAX_OUTPUT	(64 * 1024)

struct uhci_debug {
	int size;
	char *data;
};

static int uhci_debug_open(struct inode *inode, struct file *file)
{
	struct uhci_hcd *uhci = inode->i_private;
	struct uhci_debug *up;
	unsigned long flags;

	up = kmalloc(sizeof(*up), GFP_KERNEL);
	if (!up)
		return -ENOMEM;

	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	if (!up->data) {
		kfree(up);
		return -ENOMEM;
	}

	up->size = 0;
	spin_lock_irqsave(&uhci->lock, flags);
	if (uhci->is_initialized)
		up->size = uhci_sprint_schedule(uhci, up->data,
					MAX_OUTPUT - EXTRA_SPACE);
	spin_unlock_irqrestore(&uhci->lock, flags);

	file->private_data = up;

	return 0;
}

static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
{
	struct uhci_debug *up;
	loff_t new = -1;

	up = file->private_data;

	/*
	 * XXX: atomic 64bit seek access, but that needs to be fixed in the VFS
	 */
	switch (whence) {
	case 0:
		new = off;
		break;
	case 1:
		new = file->f_pos + off;
		break;
	}

	if (new < 0 || new > up->size)
		return -EINVAL;

	return (file->f_pos = new);
}

static ssize_t uhci_debug_read(struct file *file, char __user *buf,
				size_t nbytes, loff_t *ppos)
{
	struct uhci_debug *up = file->private_data;
	return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
}

static int uhci_debug_release(struct inode *inode, struct file *file)
{
	struct uhci_debug *up = file->private_data;

	kfree(up->data);
	kfree(up);

	return 0;
}

static const struct file_operations uhci_debug_operations = {
	.owner =	THIS_MODULE,
	.open =		uhci_debug_open,
	.llseek =	uhci_debug_lseek,
	.read =		uhci_debug_read,
	.release =	uhci_debug_release,
};
#define UHCI_DEBUG_OPS

#endif	/* CONFIG_DEBUG_FS */

#else	/* DEBUG */

static inline void lprintk(char *buf)
{}

static inline int uhci_show_qh(struct uhci_hcd *uhci,
		struct uhci_qh *qh, char *buf, int len, int space)
{
	return 0;
}

static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
		char *buf, int len)
{
	return 0;
}

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* UHCI-specific debugging code. Invaluable when something
	3	* goes wrong, but don't get in my face.
	4	*
687f5f34 AS	5	* Kernel visible pointers are surrounded in []s and bus
687f5f34 AS	6	* visible pointers are surrounded in ()s
1da177e4 LT	7	*
	8	* (C) Copyright 1999 Linus Torvalds
	9	* (C) Copyright 1999-2001 Johannes Erdfelt
	10	*/
	11
5a0e3ad6	12	#include <linux/slab.h>
1da177e4 LT	13	#include <linux/kernel.h>
1da177e4 LT	14	#include <linux/debugfs.h>
1da177e4 LT	15	#include <asm/io.h>
	16
	17	#include "uhci-hcd.h"
	18
13996ca7 CG	19	#define EXTRA_SPACE 1024
13996ca7 CG	20
8d402e1a AS	21	static struct dentry *uhci_debugfs_root;
	22
	23	#ifdef DEBUG
1da177e4	24
687f5f34	25	/* Handle REALLY large printks so we don't overflow buffers */
8d402e1a	26	static void lprintk(char *buf)
1da177e4 LT	27	{
	28	char *p;
	29
	30	/* Just write one line at a time */
	31	while (buf) {
	32	p = strchr(buf, '\n');
	33	if (p)
	34	*p = 0;
	35	printk(KERN_DEBUG "%s\n", buf);
	36	buf = p;
	37	if (buf)
	38	buf++;
	39	}
	40	}
	41
51e2f62f JA	42	static int uhci_show_td(struct uhci_hcd uhci, struct uhci_td td, char *buf,
51e2f62f JA	43	int len, int space)
1da177e4 LT	44	{
	45	char *out = buf;
	46	char *spid;
	47	u32 status, token;
	48
51e2f62f JA	49	status = td_status(uhci, td);
	50	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
	51	hc32_to_cpu(uhci, td->link));
1da177e4 LT	52	out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
	53	((status >> 27) & 3),
	54	(status & TD_CTRL_SPD) ? "SPD " : "",
	55	(status & TD_CTRL_LS) ? "LS " : "",
	56	(status & TD_CTRL_IOC) ? "IOC " : "",
	57	(status & TD_CTRL_ACTIVE) ? "Active " : "",
	58	(status & TD_CTRL_STALLED) ? "Stalled " : "",
	59	(status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
	60	(status & TD_CTRL_BABBLE) ? "Babble " : "",
	61	(status & TD_CTRL_NAK) ? "NAK " : "",
	62	(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
	63	(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
	64	status & 0x7ff);
13996ca7 CG	65	if (out - buf > len)
13996ca7 CG	66	goto done;
1da177e4	67
51e2f62f	68	token = td_token(uhci, td);
1da177e4 LT	69	switch (uhci_packetid(token)) {
	70	case USB_PID_SETUP:
	71	spid = "SETUP";
	72	break;
	73	case USB_PID_OUT:
	74	spid = "OUT";
	75	break;
	76	case USB_PID_IN:
	77	spid = "IN";
	78	break;
	79	default:
	80	spid = "?";
	81	break;
	82	}
	83
	84	out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
	85	token >> 21,
	86	((token >> 19) & 1),
	87	(token >> 15) & 15,
	88	(token >> 8) & 127,
	89	(token & 0xff),
	90	spid);
51e2f62f	91	out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));
1da177e4	92
13996ca7 CG	93	done:
	94	if (out - buf > len)
	95	out += sprintf(out, " ...\n");
1da177e4 LT	96	return out - buf;
	97	}
	98
51e2f62f JA	99	static int uhci_show_urbp(struct uhci_hcd uhci, struct urb_priv urbp,
51e2f62f JA	100	char *buf, int len, int space)
1da177e4 LT	101	{
1da177e4 LT	102	char *out = buf;
1da177e4	103	struct uhci_td *td;
dccf4a48	104	int i, nactive, ninactive;
4de7d2c2	105	char *ptype;
dccf4a48	106
dccf4a48 AS	107
	108	out += sprintf(out, "urb_priv [%p] ", urbp);
	109	out += sprintf(out, "urb [%p] ", urbp->urb);
	110	out += sprintf(out, "qh [%p] ", urbp->qh);
	111	out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
	112	out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
	113	(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
13996ca7 CG	114	if (out - buf > len)
13996ca7 CG	115	goto done;
dccf4a48 AS	116
dccf4a48 AS	117	switch (usb_pipetype(urbp->urb->pipe)) {
4de7d2c2 AS	118	case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
	119	case PIPE_INTERRUPT: ptype = "INT"; break;
	120	case PIPE_BULK: ptype = "BLK"; break;
	121	default:
	122	case PIPE_CONTROL: ptype = "CTL"; break;
dccf4a48 AS	123	}
dccf4a48 AS	124
4de7d2c2	125	out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
7ea0a2bc AS	126	out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
	127	(urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
	128	"-8" : ""));
dccf4a48	129
eb231054 AS	130	if (urbp->urb->unlinked)
eb231054 AS	131	out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
dccf4a48 AS	132	out += sprintf(out, "\n");
dccf4a48 AS	133
13996ca7 CG	134	if (out - buf > len)
	135	goto done;
	136
dccf4a48 AS	137	i = nactive = ninactive = 0;
dccf4a48 AS	138	list_for_each_entry(td, &urbp->td_list, list) {
c8155cc5 AS	139	if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
c8155cc5 AS	140	(++i <= 10 \|\| debug > 2)) {
dccf4a48	141	out += sprintf(out, "%*s%d: ", space + 2, "", i);
51e2f62f JA	142	out += uhci_show_td(uhci, td, out,
51e2f62f JA	143	len - (out - buf), 0);
13996ca7 CG	144	if (out - buf > len)
13996ca7 CG	145	goto tail;
dccf4a48	146	} else {
51e2f62f	147	if (td_status(uhci, td) & TD_CTRL_ACTIVE)
dccf4a48 AS	148	++nactive;
	149	else
	150	++ninactive;
	151	}
	152	}
	153	if (nactive + ninactive > 0)
3171fcab CG	154	out += sprintf(out,
3171fcab CG	155	"%*s[skipped %d inactive and %d active TDs]\n",
dccf4a48	156	space, "", ninactive, nactive);
13996ca7 CG	157	done:
	158	if (out - buf > len)
	159	out += sprintf(out, " ...\n");
	160	tail:
dccf4a48 AS	161	return out - buf;
	162	}
	163
e009f1b2 AS	164	static int uhci_show_qh(struct uhci_hcd *uhci,
e009f1b2 AS	165	struct uhci_qh qh, char buf, int len, int space)
dccf4a48 AS	166	{
	167	char *out = buf;
	168	int i, nurbs;
51e2f62f	169	__hc32 element = qh_element(qh);
4de7d2c2	170	char *qtype;
1da177e4	171
4de7d2c2 AS	172	switch (qh->type) {
	173	case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
	174	case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
	175	case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
	176	case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
	177	default: qtype = "Skel" ; break;
	178	}
	179
	180	out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
	181	space, "", qh, qtype,
51e2f62f JA	182	hc32_to_cpu(uhci, qh->link),
51e2f62f JA	183	hc32_to_cpu(uhci, element));
caf3827a	184	if (qh->type == USB_ENDPOINT_XFER_ISOC)
3171fcab CG	185	out += sprintf(out,
3171fcab CG	186	"%*s period %d phase %d load %d us, frame %x desc [%p]\n",
3ca2a321 AS	187	space, "", qh->period, qh->phase, qh->load,
	188	qh->iso_frame, qh->iso_packet_desc);
	189	else if (qh->type == USB_ENDPOINT_XFER_INT)
	190	out += sprintf(out, "%*s period %d phase %d load %d us\n",
	191	space, "", qh->period, qh->phase, qh->load);
13996ca7 CG	192	if (out - buf > len)
13996ca7 CG	193	goto done;
1da177e4	194
51e2f62f	195	if (element & UHCI_PTR_QH(uhci))
1da177e4 LT	196	out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
1da177e4 LT	197
51e2f62f	198	if (element & UHCI_PTR_DEPTH(uhci))
1da177e4 LT	199	out += sprintf(out, "%*s Depth traverse\n", space, "");
1da177e4 LT	200
51e2f62f	201	if (element & cpu_to_hc32(uhci, 8))
1da177e4 LT	202	out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
1da177e4 LT	203
51e2f62f	204	if (!(element & ~(UHCI_PTR_QH(uhci) \| UHCI_PTR_DEPTH(uhci))))
1da177e4 LT	205	out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
1da177e4 LT	206
13996ca7 CG	207	if (out - buf > len)
	208	goto done;
	209
dccf4a48 AS	210	if (list_empty(&qh->queue)) {
dccf4a48 AS	211	out += sprintf(out, "%*s queue is empty\n", space, "");
13996ca7	212	if (qh == uhci->skel_async_qh) {
51e2f62f	213	out += uhci_show_td(uhci, uhci->term_td, out,
e009f1b2	214	len - (out - buf), 0);
13996ca7 CG	215	if (out - buf > len)
	216	goto tail;
	217	}
dccf4a48 AS	218	} else {
	219	struct urb_priv *urbp = list_entry(qh->queue.next,
	220	struct urb_priv, node);
	221	struct uhci_td *td = list_entry(urbp->td_list.next,
	222	struct uhci_td, list);
	223
51e2f62f	224	if (element != LINK_TO_TD(uhci, td))
dccf4a48 AS	225	out += sprintf(out, "%*s Element != First TD\n",
	226	space, "");
	227	i = nurbs = 0;
	228	list_for_each_entry(urbp, &qh->queue, node) {
13996ca7	229	if (++i <= 10) {
51e2f62f	230	out += uhci_show_urbp(uhci, urbp, out,
dccf4a48	231	len - (out - buf), space + 2);
13996ca7 CG	232	if (out - buf > len)
	233	goto tail;
	234	}
dccf4a48 AS	235	else
dccf4a48 AS	236	++nurbs;
1da177e4	237	}
dccf4a48 AS	238	if (nurbs > 0)
	239	out += sprintf(out, "%*s Skipped %d URBs\n",
	240	space, "", nurbs);
1da177e4 LT	241	}
1da177e4 LT	242
13996ca7 CG	243	if (out - buf > len)
	244	goto done;
	245
85a975d0	246	if (qh->dummy_td) {
af0bb599	247	out += sprintf(out, "%*s Dummy TD\n", space, "");
51e2f62f JA	248	out += uhci_show_td(uhci, qh->dummy_td, out,
51e2f62f JA	249	len - (out - buf), 0);
13996ca7 CG	250	if (out - buf > len)
13996ca7 CG	251	goto tail;
af0bb599 AS	252	}
af0bb599 AS	253
13996ca7 CG	254	done:
	255	if (out - buf > len)
	256	out += sprintf(out, " ...\n");
	257	tail:
1da177e4 LT	258	return out - buf;
	259	}
	260
13996ca7	261	static int uhci_show_sc(int port, unsigned short status, char *buf)
1da177e4	262	{
13996ca7	263	return sprintf(buf, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
1da177e4 LT	264	port,
	265	status,
	266	(status & USBPORTSC_SUSP) ? " Suspend" : "",
	267	(status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
	268	(status & USBPORTSC_OC) ? " OverCurrent" : "",
	269	(status & USBPORTSC_PR) ? " Reset" : "",
	270	(status & USBPORTSC_LSDA) ? " LowSpeed" : "",
	271	(status & USBPORTSC_RD) ? " ResumeDetect" : "",
	272	(status & USBPORTSC_PEC) ? " EnableChange" : "",
	273	(status & USBPORTSC_PE) ? " Enabled" : "",
	274	(status & USBPORTSC_CSC) ? " ConnectChange" : "",
	275	(status & USBPORTSC_CCS) ? " Connected" : "");
1da177e4 LT	276	}
1da177e4 LT	277
13996ca7	278	static int uhci_show_root_hub_state(struct uhci_hcd uhci, char buf)
c8f4fe43	279	{
c8f4fe43 AS	280	char *rh_state;
c8f4fe43 AS	281
c8f4fe43 AS	282	switch (uhci->rh_state) {
	283	case UHCI_RH_RESET:
	284	rh_state = "reset"; break;
	285	case UHCI_RH_SUSPENDED:
	286	rh_state = "suspended"; break;
	287	case UHCI_RH_AUTO_STOPPED:
	288	rh_state = "auto-stopped"; break;
	289	case UHCI_RH_RESUMING:
	290	rh_state = "resuming"; break;
	291	case UHCI_RH_SUSPENDING:
	292	rh_state = "suspending"; break;
	293	case UHCI_RH_RUNNING:
	294	rh_state = "running"; break;
	295	case UHCI_RH_RUNNING_NODEVS:
	296	rh_state = "running, no devs"; break;
	297	default:
	298	rh_state = "?"; break;
	299	}
13996ca7	300	return sprintf(buf, "Root-hub state: %s FSBR: %d\n",
84afddd7	301	rh_state, uhci->fsbr_is_on);
c8f4fe43 AS	302	}
c8f4fe43 AS	303
1da177e4 LT	304	static int uhci_show_status(struct uhci_hcd uhci, char buf, int len)
	305	{
	306	char *out = buf;
1da177e4 LT	307	unsigned short usbcmd, usbstat, usbint, usbfrnum;
	308	unsigned int flbaseadd;
	309	unsigned char sof;
	310	unsigned short portsc1, portsc2;
	311
1da177e4	312
9faa091a JA	313	usbcmd = uhci_readw(uhci, 0);
	314	usbstat = uhci_readw(uhci, 2);
	315	usbint = uhci_readw(uhci, 4);
	316	usbfrnum = uhci_readw(uhci, 6);
	317	flbaseadd = uhci_readl(uhci, 8);
	318	sof = uhci_readb(uhci, 12);
	319	portsc1 = uhci_readw(uhci, 16);
	320	portsc2 = uhci_readw(uhci, 18);
1da177e4 LT	321
	322	out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
	323	usbcmd,
	324	(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
	325	(usbcmd & USBCMD_CF) ? "CF " : "",
	326	(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
	327	(usbcmd & USBCMD_FGR) ? "FGR " : "",
	328	(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
	329	(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
	330	(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
	331	(usbcmd & USBCMD_RS) ? "RS " : "");
13996ca7 CG	332	if (out - buf > len)
13996ca7 CG	333	goto done;
1da177e4 LT	334
	335	out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
	336	usbstat,
	337	(usbstat & USBSTS_HCH) ? "HCHalted " : "",
	338	(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
	339	(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
	340	(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
	341	(usbstat & USBSTS_ERROR) ? "USBError " : "",
	342	(usbstat & USBSTS_USBINT) ? "USBINT " : "");
13996ca7 CG	343	if (out - buf > len)
13996ca7 CG	344	goto done;
1da177e4 LT	345
	346	out += sprintf(out, " usbint = %04x\n", usbint);
	347	out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
	348	0xfff & (4*(unsigned int)usbfrnum));
	349	out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
	350	out += sprintf(out, " sof = %02x\n", sof);
13996ca7 CG	351	if (out - buf > len)
	352	goto done;
	353
	354	out += uhci_show_sc(1, portsc1, out);
	355	if (out - buf > len)
	356	goto done;
	357
	358	out += uhci_show_sc(2, portsc2, out);
	359	if (out - buf > len)
	360	goto done;
	361
	362	out += sprintf(out,
	363	"Most recent frame: %x (%d) Last ISO frame: %x (%d)\n",
c8155cc5 AS	364	uhci->frame_number, uhci->frame_number & 1023,
c8155cc5 AS	365	uhci->last_iso_frame, uhci->last_iso_frame & 1023);
1da177e4	366
13996ca7 CG	367	done:
	368	if (out - buf > len)
	369	out += sprintf(out, " ...\n");
1da177e4 LT	370	return out - buf;
	371	}
	372
1da177e4 LT	373	static int uhci_sprint_schedule(struct uhci_hcd uhci, char buf, int len)
1da177e4 LT	374	{
1da177e4 LT	375	char *out = buf;
	376	int i, j;
	377	struct uhci_qh *qh;
	378	struct uhci_td *td;
	379	struct list_head tmp, head;
f3fe239b	380	int nframes, nerrs;
51e2f62f JA	381	__hc32 link;
51e2f62f JA	382	__hc32 fsbr_link;
17230acd AS	383
	384	static const char * const qh_names[] = {
	385	"unlink", "iso", "int128", "int64", "int32", "int16",
	386	"int8", "int4", "int2", "async", "term"
	387	};
1da177e4	388
13996ca7 CG	389	out += uhci_show_root_hub_state(uhci, out);
	390	if (out - buf > len)
	391	goto done;
1da177e4 LT	392	out += sprintf(out, "HC status\n");
1da177e4 LT	393	out += uhci_show_status(uhci, out, len - (out - buf));
13996ca7 CG	394	if (out - buf > len)
13996ca7 CG	395	goto tail;
3ca2a321 AS	396
	397	out += sprintf(out, "Periodic load table\n");
	398	for (i = 0; i < MAX_PHASE; ++i) {
	399	out += sprintf(out, "\t%d", uhci->load[i]);
	400	if (i % 8 == 7)
	401	*out++ = '\n';
	402	}
	403	out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
	404	uhci->total_load,
	405	uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
	406	uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
dccf4a48	407	if (debug <= 1)
13996ca7	408	goto tail;
1da177e4 LT	409
1da177e4 LT	410	out += sprintf(out, "Frame List\n");
f3fe239b AS	411	nframes = 10;
f3fe239b AS	412	nerrs = 0;
1da177e4	413	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
51e2f62f	414	__hc32 qh_dma;
f3fe239b	415
13996ca7 CG	416	if (out - buf > len)
13996ca7 CG	417	goto done;
f3fe239b	418	j = 0;
a1d59ce8	419	td = uhci->frame_cpu[i];
f3fe239b	420	link = uhci->frame[i];
1da177e4	421	if (!td)
f3fe239b	422	goto check_link;
1da177e4	423
f3fe239b AS	424	if (nframes > 0) {
f3fe239b AS	425	out += sprintf(out, "- Frame %d -> (%08x)\n",
51e2f62f	426	i, hc32_to_cpu(uhci, link));
f3fe239b AS	427	j = 1;
f3fe239b AS	428	}
1da177e4 LT	429
	430	head = &td->fl_list;
	431	tmp = head;
	432	do {
	433	td = list_entry(tmp, struct uhci_td, fl_list);
	434	tmp = tmp->next;
51e2f62f	435	if (link != LINK_TO_TD(uhci, td)) {
13996ca7	436	if (nframes > 0) {
3171fcab CG	437	out += sprintf(out,
3171fcab CG	438	" link does not match list entry!\n");
13996ca7 CG	439	if (out - buf > len)
	440	goto done;
	441	} else
f3fe239b AS	442	++nerrs;
f3fe239b AS	443	}
13996ca7	444	if (nframes > 0) {
51e2f62f	445	out += uhci_show_td(uhci, td, out,
f3fe239b	446	len - (out - buf), 4);
13996ca7 CG	447	if (out - buf > len)
	448	goto tail;
	449	}
f3fe239b	450	link = td->link;
1da177e4	451	} while (tmp != head);
f3fe239b AS	452
	453	check_link:
	454	qh_dma = uhci_frame_skel_link(uhci, i);
	455	if (link != qh_dma) {
	456	if (nframes > 0) {
	457	if (!j) {
	458	out += sprintf(out,
	459	"- Frame %d -> (%08x)\n",
51e2f62f	460	i, hc32_to_cpu(uhci, link));
f3fe239b AS	461	j = 1;
f3fe239b AS	462	}
3171fcab CG	463	out += sprintf(out,
3171fcab CG	464	" link does not match QH (%08x)!\n",
51e2f62f	465	hc32_to_cpu(uhci, qh_dma));
13996ca7 CG	466	if (out - buf > len)
13996ca7 CG	467	goto done;
f3fe239b AS	468	} else
	469	++nerrs;
	470	}
	471	nframes -= j;
1da177e4	472	}
f3fe239b AS	473	if (nerrs > 0)
f3fe239b AS	474	out += sprintf(out, "Skipped %d bad links\n", nerrs);
1da177e4	475
687f5f34	476	out += sprintf(out, "Skeleton QHs\n");
1da177e4	477
13996ca7 CG	478	if (out - buf > len)
	479	goto done;
	480
e009f1b2	481	fsbr_link = 0;
1da177e4	482	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
dccf4a48	483	int cnt = 0;
1da177e4 LT	484
1da177e4 LT	485	qh = uhci->skelqh[i];
3171fcab	486	out += sprintf(out, "- skel_%s_qh\n", qh_names[i]);
e009f1b2	487	out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
13996ca7 CG	488	if (out - buf > len)
13996ca7 CG	489	goto tail;
1da177e4 LT	490
1da177e4 LT	491	/* Last QH is the Terminating QH, it's different */
17230acd	492	if (i == SKEL_TERM) {
13996ca7	493	if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) {
3171fcab CG	494	out += sprintf(out,
3171fcab CG	495	" skel_term_qh element is not set to term_td!\n");
13996ca7 CG	496	if (out - buf > len)
	497	goto done;
	498	}
e009f1b2 AS	499	link = fsbr_link;
e009f1b2 AS	500	if (!link)
51e2f62f	501	link = LINK_TO_QH(uhci, uhci->skel_term_qh);
e009f1b2	502	goto check_qh_link;
1da177e4 LT	503	}
1da177e4 LT	504
dccf4a48	505	head = &qh->node;
1da177e4 LT	506	tmp = head->next;
	507
	508	while (tmp != head) {
dccf4a48	509	qh = list_entry(tmp, struct uhci_qh, node);
1da177e4	510	tmp = tmp->next;
13996ca7	511	if (++cnt <= 10) {
e009f1b2	512	out += uhci_show_qh(uhci, qh, out,
dccf4a48	513	len - (out - buf), 4);
13996ca7 CG	514	if (out - buf > len)
	515	goto tail;
	516	}
17230acd	517	if (!fsbr_link && qh->skel >= SKEL_FSBR)
51e2f62f	518	fsbr_link = LINK_TO_QH(uhci, qh);
1da177e4	519	}
dccf4a48 AS	520	if ((cnt -= 10) > 0)
dccf4a48 AS	521	out += sprintf(out, " Skipped %d QHs\n", cnt);
1da177e4	522
51e2f62f	523	link = UHCI_PTR_TERM(uhci);
17230acd AS	524	if (i <= SKEL_ISO)
	525	;
	526	else if (i < SKEL_ASYNC)
51e2f62f	527	link = LINK_TO_QH(uhci, uhci->skel_async_qh);
17230acd AS	528	else if (!uhci->fsbr_is_on)
17230acd AS	529	;
17230acd	530	else
51e2f62f	531	link = LINK_TO_QH(uhci, uhci->skel_term_qh);
17230acd AS	532	check_qh_link:
17230acd AS	533	if (qh->link != link)
3171fcab CG	534	out += sprintf(out,
3171fcab CG	535	" last QH not linked to next skeleton!\n");
13996ca7 CG	536
	537	if (out - buf > len)
	538	goto done;
1da177e4 LT	539	}
1da177e4 LT	540
13996ca7 CG	541	done:
	542	if (out - buf > len)
	543	out += sprintf(out, " ...\n");
	544	tail:
1da177e4 LT	545	return out - buf;
	546	}
	547
8d402e1a AS	548	#ifdef CONFIG_DEBUG_FS
8d402e1a AS	549
1da177e4 LT	550	#define MAX_OUTPUT (64 * 1024)
	551
	552	struct uhci_debug {
	553	int size;
	554	char *data;
1da177e4 LT	555	};
	556
	557	static int uhci_debug_open(struct inode inode, struct file file)
	558	{
8e18e294	559	struct uhci_hcd *uhci = inode->i_private;
1da177e4	560	struct uhci_debug *up;
dccf4a48	561	unsigned long flags;
1da177e4	562
1da177e4 LT	563	up = kmalloc(sizeof(*up), GFP_KERNEL);
1da177e4 LT	564	if (!up)
00b81fb2	565	return -ENOMEM;
1da177e4 LT	566
	567	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	568	if (!up->data) {
	569	kfree(up);
00b81fb2	570	return -ENOMEM;
1da177e4 LT	571	}
1da177e4 LT	572
8d402e1a	573	up->size = 0;
dccf4a48	574	spin_lock_irqsave(&uhci->lock, flags);
8d402e1a	575	if (uhci->is_initialized)
13996ca7 CG	576	up->size = uhci_sprint_schedule(uhci, up->data,
13996ca7 CG	577	MAX_OUTPUT - EXTRA_SPACE);
dccf4a48	578	spin_unlock_irqrestore(&uhci->lock, flags);
1da177e4 LT	579
	580	file->private_data = up;
	581
00b81fb2	582	return 0;
1da177e4 LT	583	}
	584
	585	static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
	586	{
	587	struct uhci_debug *up;
	588	loff_t new = -1;
	589
1da177e4 LT	590	up = file->private_data;
1da177e4 LT	591
3171fcab CG	592	/*
	593	* XXX: atomic 64bit seek access, but that needs to be fixed in the VFS
	594	*/
1da177e4 LT	595	switch (whence) {
	596	case 0:
	597	new = off;
	598	break;
	599	case 1:
	600	new = file->f_pos + off;
	601	break;
	602	}
00b81fb2 AK	603
00b81fb2 AK	604	if (new < 0 \|\| new > up->size)
1da177e4	605	return -EINVAL;
00b81fb2	606
1da177e4 LT	607	return (file->f_pos = new);
	608	}
	609
	610	static ssize_t uhci_debug_read(struct file file, char __user buf,
	611	size_t nbytes, loff_t *ppos)
	612	{
	613	struct uhci_debug *up = file->private_data;
	614	return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
	615	}
	616
	617	static int uhci_debug_release(struct inode inode, struct file file)
	618	{
	619	struct uhci_debug *up = file->private_data;
	620
	621	kfree(up->data);
	622	kfree(up);
	623
	624	return 0;
	625	}
	626
066202dd	627	static const struct file_operations uhci_debug_operations = {
8d402e1a	628	.owner = THIS_MODULE,
1da177e4 LT	629	.open = uhci_debug_open,
	630	.llseek = uhci_debug_lseek,
	631	.read = uhci_debug_read,
	632	.release = uhci_debug_release,
	633	};
b409214c	634	#define UHCI_DEBUG_OPS
1da177e4	635
8d402e1a	636	#endif /* CONFIG_DEBUG_FS */
1da177e4	637
8d402e1a AS	638	#else /* DEBUG */
	639
	640	static inline void lprintk(char *buf)
	641	{}
	642
e009f1b2 AS	643	static inline int uhci_show_qh(struct uhci_hcd *uhci,
e009f1b2 AS	644	struct uhci_qh qh, char buf, int len, int space)
8d402e1a AS	645	{
	646	return 0;
	647	}
	648
	649	static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
	650	char *buf, int len)
	651	{
	652	return 0;
	653	}
1da177e4 LT	654
1da177e4 LT	655	#endif