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

// SPDX-License-Identifier: GPL-2.0
/*
 * 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 CONFIG_DYNAMIC_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, USBCMD);
	usbstat   = uhci_readw(uhci, USBSTS);
	usbint    = uhci_readw(uhci, USBINTR);
	usbfrnum  = uhci_readw(uhci, USBFRNUM);
	flbaseadd = uhci_readl(uhci, USBFLBASEADD);
	sof       = uhci_readb(uhci, USBSOF);
	portsc1   = uhci_readw(uhci, USBPORTSC1);
	portsc2   = uhci_readw(uhci, USBPORTSC2);

	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 = file->private_data;
	return no_seek_end_llseek_size(file, off, whence, up->size);
}

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	/* CONFIG_DYNAMIC_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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* UHCI-specific debugging code. Invaluable when something
	4	* goes wrong, but don't get in my face.
	5	*
687f5f34 AS	6	* Kernel visible pointers are surrounded in []s and bus
687f5f34 AS	7	* visible pointers are surrounded in ()s
1da177e4 LT	8	*
	9	* (C) Copyright 1999 Linus Torvalds
	10	* (C) Copyright 1999-2001 Johannes Erdfelt
	11	*/
	12
5a0e3ad6	13	#include <linux/slab.h>
1da177e4 LT	14	#include <linux/kernel.h>
1da177e4 LT	15	#include <linux/debugfs.h>
1da177e4 LT	16	#include <asm/io.h>
	17
	18	#include "uhci-hcd.h"
	19
13996ca7 CG	20	#define EXTRA_SPACE 1024
13996ca7 CG	21
8d402e1a AS	22	static struct dentry *uhci_debugfs_root;
8d402e1a AS	23
1c20163d	24	#ifdef CONFIG_DYNAMIC_DEBUG
1da177e4	25
687f5f34	26	/* Handle REALLY large printks so we don't overflow buffers */
8d402e1a	27	static void lprintk(char *buf)
1da177e4 LT	28	{
	29	char *p;
	30
	31	/* Just write one line at a time */
	32	while (buf) {
	33	p = strchr(buf, '\n');
	34	if (p)
	35	*p = 0;
	36	printk(KERN_DEBUG "%s\n", buf);
	37	buf = p;
	38	if (buf)
	39	buf++;
	40	}
	41	}
	42
51e2f62f JA	43	static int uhci_show_td(struct uhci_hcd uhci, struct uhci_td td, char *buf,
51e2f62f JA	44	int len, int space)
1da177e4 LT	45	{
	46	char *out = buf;
	47	char *spid;
	48	u32 status, token;
	49
51e2f62f JA	50	status = td_status(uhci, td);
	51	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
	52	hc32_to_cpu(uhci, td->link));
1da177e4 LT	53	out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
	54	((status >> 27) & 3),
	55	(status & TD_CTRL_SPD) ? "SPD " : "",
	56	(status & TD_CTRL_LS) ? "LS " : "",
	57	(status & TD_CTRL_IOC) ? "IOC " : "",
	58	(status & TD_CTRL_ACTIVE) ? "Active " : "",
	59	(status & TD_CTRL_STALLED) ? "Stalled " : "",
	60	(status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
	61	(status & TD_CTRL_BABBLE) ? "Babble " : "",
	62	(status & TD_CTRL_NAK) ? "NAK " : "",
	63	(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
	64	(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
	65	status & 0x7ff);
13996ca7 CG	66	if (out - buf > len)
13996ca7 CG	67	goto done;
1da177e4	68
51e2f62f	69	token = td_token(uhci, td);
1da177e4 LT	70	switch (uhci_packetid(token)) {
	71	case USB_PID_SETUP:
	72	spid = "SETUP";
	73	break;
	74	case USB_PID_OUT:
	75	spid = "OUT";
	76	break;
	77	case USB_PID_IN:
	78	spid = "IN";
	79	break;
	80	default:
	81	spid = "?";
	82	break;
	83	}
	84
	85	out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
	86	token >> 21,
	87	((token >> 19) & 1),
	88	(token >> 15) & 15,
	89	(token >> 8) & 127,
	90	(token & 0xff),
	91	spid);
51e2f62f	92	out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));
1da177e4	93
13996ca7 CG	94	done:
	95	if (out - buf > len)
	96	out += sprintf(out, " ...\n");
1da177e4 LT	97	return out - buf;
	98	}
	99
51e2f62f JA	100	static int uhci_show_urbp(struct uhci_hcd uhci, struct urb_priv urbp,
51e2f62f JA	101	char *buf, int len, int space)
1da177e4 LT	102	{
1da177e4 LT	103	char *out = buf;
1da177e4	104	struct uhci_td *td;
dccf4a48	105	int i, nactive, ninactive;
4de7d2c2	106	char *ptype;
dccf4a48	107
dccf4a48 AS	108
	109	out += sprintf(out, "urb_priv [%p] ", urbp);
	110	out += sprintf(out, "urb [%p] ", urbp->urb);
	111	out += sprintf(out, "qh [%p] ", urbp->qh);
	112	out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
	113	out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
	114	(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
13996ca7 CG	115	if (out - buf > len)
13996ca7 CG	116	goto done;
dccf4a48 AS	117
dccf4a48 AS	118	switch (usb_pipetype(urbp->urb->pipe)) {
4de7d2c2 AS	119	case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
	120	case PIPE_INTERRUPT: ptype = "INT"; break;
	121	case PIPE_BULK: ptype = "BLK"; break;
	122	default:
	123	case PIPE_CONTROL: ptype = "CTL"; break;
dccf4a48 AS	124	}
dccf4a48 AS	125
4de7d2c2	126	out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
7ea0a2bc AS	127	out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
	128	(urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
	129	"-8" : ""));
dccf4a48	130
eb231054 AS	131	if (urbp->urb->unlinked)
eb231054 AS	132	out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
dccf4a48 AS	133	out += sprintf(out, "\n");
dccf4a48 AS	134
13996ca7 CG	135	if (out - buf > len)
	136	goto done;
	137
dccf4a48 AS	138	i = nactive = ninactive = 0;
dccf4a48 AS	139	list_for_each_entry(td, &urbp->td_list, list) {
c8155cc5 AS	140	if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
c8155cc5 AS	141	(++i <= 10 \|\| debug > 2)) {
dccf4a48	142	out += sprintf(out, "%*s%d: ", space + 2, "", i);
51e2f62f JA	143	out += uhci_show_td(uhci, td, out,
51e2f62f JA	144	len - (out - buf), 0);
13996ca7 CG	145	if (out - buf > len)
13996ca7 CG	146	goto tail;
dccf4a48	147	} else {
51e2f62f	148	if (td_status(uhci, td) & TD_CTRL_ACTIVE)
dccf4a48 AS	149	++nactive;
	150	else
	151	++ninactive;
	152	}
	153	}
	154	if (nactive + ninactive > 0)
3171fcab CG	155	out += sprintf(out,
3171fcab CG	156	"%*s[skipped %d inactive and %d active TDs]\n",
dccf4a48	157	space, "", ninactive, nactive);
13996ca7 CG	158	done:
	159	if (out - buf > len)
	160	out += sprintf(out, " ...\n");
	161	tail:
dccf4a48 AS	162	return out - buf;
	163	}
	164
e009f1b2 AS	165	static int uhci_show_qh(struct uhci_hcd *uhci,
e009f1b2 AS	166	struct uhci_qh qh, char buf, int len, int space)
dccf4a48 AS	167	{
	168	char *out = buf;
	169	int i, nurbs;
51e2f62f	170	__hc32 element = qh_element(qh);
4de7d2c2	171	char *qtype;
1da177e4	172
4de7d2c2 AS	173	switch (qh->type) {
	174	case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
	175	case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
	176	case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
	177	case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
	178	default: qtype = "Skel" ; break;
	179	}
	180
	181	out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
	182	space, "", qh, qtype,
51e2f62f JA	183	hc32_to_cpu(uhci, qh->link),
51e2f62f JA	184	hc32_to_cpu(uhci, element));
caf3827a	185	if (qh->type == USB_ENDPOINT_XFER_ISOC)
3171fcab CG	186	out += sprintf(out,
3171fcab CG	187	"%*s period %d phase %d load %d us, frame %x desc [%p]\n",
3ca2a321 AS	188	space, "", qh->period, qh->phase, qh->load,
	189	qh->iso_frame, qh->iso_packet_desc);
	190	else if (qh->type == USB_ENDPOINT_XFER_INT)
	191	out += sprintf(out, "%*s period %d phase %d load %d us\n",
	192	space, "", qh->period, qh->phase, qh->load);
13996ca7 CG	193	if (out - buf > len)
13996ca7 CG	194	goto done;
1da177e4	195
51e2f62f	196	if (element & UHCI_PTR_QH(uhci))
1da177e4 LT	197	out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
1da177e4 LT	198
51e2f62f	199	if (element & UHCI_PTR_DEPTH(uhci))
1da177e4 LT	200	out += sprintf(out, "%*s Depth traverse\n", space, "");
1da177e4 LT	201
51e2f62f	202	if (element & cpu_to_hc32(uhci, 8))
1da177e4 LT	203	out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
1da177e4 LT	204
51e2f62f	205	if (!(element & ~(UHCI_PTR_QH(uhci) \| UHCI_PTR_DEPTH(uhci))))
1da177e4 LT	206	out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
1da177e4 LT	207
13996ca7 CG	208	if (out - buf > len)
	209	goto done;
	210
dccf4a48 AS	211	if (list_empty(&qh->queue)) {
dccf4a48 AS	212	out += sprintf(out, "%*s queue is empty\n", space, "");
13996ca7	213	if (qh == uhci->skel_async_qh) {
51e2f62f	214	out += uhci_show_td(uhci, uhci->term_td, out,
e009f1b2	215	len - (out - buf), 0);
13996ca7 CG	216	if (out - buf > len)
	217	goto tail;
	218	}
dccf4a48 AS	219	} else {
	220	struct urb_priv *urbp = list_entry(qh->queue.next,
	221	struct urb_priv, node);
	222	struct uhci_td *td = list_entry(urbp->td_list.next,
	223	struct uhci_td, list);
	224
51e2f62f	225	if (element != LINK_TO_TD(uhci, td))
dccf4a48 AS	226	out += sprintf(out, "%*s Element != First TD\n",
	227	space, "");
	228	i = nurbs = 0;
	229	list_for_each_entry(urbp, &qh->queue, node) {
13996ca7	230	if (++i <= 10) {
51e2f62f	231	out += uhci_show_urbp(uhci, urbp, out,
dccf4a48	232	len - (out - buf), space + 2);
13996ca7 CG	233	if (out - buf > len)
	234	goto tail;
	235	}
dccf4a48 AS	236	else
dccf4a48 AS	237	++nurbs;
1da177e4	238	}
dccf4a48 AS	239	if (nurbs > 0)
	240	out += sprintf(out, "%*s Skipped %d URBs\n",
	241	space, "", nurbs);
1da177e4 LT	242	}
1da177e4 LT	243
13996ca7 CG	244	if (out - buf > len)
	245	goto done;
	246
85a975d0	247	if (qh->dummy_td) {
af0bb599	248	out += sprintf(out, "%*s Dummy TD\n", space, "");
51e2f62f JA	249	out += uhci_show_td(uhci, qh->dummy_td, out,
51e2f62f JA	250	len - (out - buf), 0);
13996ca7 CG	251	if (out - buf > len)
13996ca7 CG	252	goto tail;
af0bb599 AS	253	}
af0bb599 AS	254
13996ca7 CG	255	done:
	256	if (out - buf > len)
	257	out += sprintf(out, " ...\n");
	258	tail:
1da177e4 LT	259	return out - buf;
	260	}
	261
13996ca7	262	static int uhci_show_sc(int port, unsigned short status, char *buf)
1da177e4	263	{
13996ca7	264	return sprintf(buf, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
1da177e4 LT	265	port,
	266	status,
	267	(status & USBPORTSC_SUSP) ? " Suspend" : "",
	268	(status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
	269	(status & USBPORTSC_OC) ? " OverCurrent" : "",
	270	(status & USBPORTSC_PR) ? " Reset" : "",
	271	(status & USBPORTSC_LSDA) ? " LowSpeed" : "",
	272	(status & USBPORTSC_RD) ? " ResumeDetect" : "",
	273	(status & USBPORTSC_PEC) ? " EnableChange" : "",
	274	(status & USBPORTSC_PE) ? " Enabled" : "",
	275	(status & USBPORTSC_CSC) ? " ConnectChange" : "",
	276	(status & USBPORTSC_CCS) ? " Connected" : "");
1da177e4 LT	277	}
1da177e4 LT	278
13996ca7	279	static int uhci_show_root_hub_state(struct uhci_hcd uhci, char buf)
c8f4fe43	280	{
c8f4fe43 AS	281	char *rh_state;
c8f4fe43 AS	282
c8f4fe43 AS	283	switch (uhci->rh_state) {
	284	case UHCI_RH_RESET:
	285	rh_state = "reset"; break;
	286	case UHCI_RH_SUSPENDED:
	287	rh_state = "suspended"; break;
	288	case UHCI_RH_AUTO_STOPPED:
	289	rh_state = "auto-stopped"; break;
	290	case UHCI_RH_RESUMING:
	291	rh_state = "resuming"; break;
	292	case UHCI_RH_SUSPENDING:
	293	rh_state = "suspending"; break;
	294	case UHCI_RH_RUNNING:
	295	rh_state = "running"; break;
	296	case UHCI_RH_RUNNING_NODEVS:
	297	rh_state = "running, no devs"; break;
	298	default:
	299	rh_state = "?"; break;
	300	}
13996ca7	301	return sprintf(buf, "Root-hub state: %s FSBR: %d\n",
84afddd7	302	rh_state, uhci->fsbr_is_on);
c8f4fe43 AS	303	}
c8f4fe43 AS	304
1da177e4 LT	305	static int uhci_show_status(struct uhci_hcd uhci, char buf, int len)
	306	{
	307	char *out = buf;
1da177e4 LT	308	unsigned short usbcmd, usbstat, usbint, usbfrnum;
	309	unsigned int flbaseadd;
	310	unsigned char sof;
	311	unsigned short portsc1, portsc2;
	312
1da177e4	313
f1125f81 DCZ	314	usbcmd = uhci_readw(uhci, USBCMD);
	315	usbstat = uhci_readw(uhci, USBSTS);
	316	usbint = uhci_readw(uhci, USBINTR);
	317	usbfrnum = uhci_readw(uhci, USBFRNUM);
	318	flbaseadd = uhci_readl(uhci, USBFLBASEADD);
	319	sof = uhci_readb(uhci, USBSOF);
	320	portsc1 = uhci_readw(uhci, USBPORTSC1);
	321	portsc2 = uhci_readw(uhci, USBPORTSC2);
1da177e4 LT	322
	323	out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
	324	usbcmd,
	325	(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
	326	(usbcmd & USBCMD_CF) ? "CF " : "",
	327	(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
	328	(usbcmd & USBCMD_FGR) ? "FGR " : "",
	329	(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
	330	(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
	331	(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
	332	(usbcmd & USBCMD_RS) ? "RS " : "");
13996ca7 CG	333	if (out - buf > len)
13996ca7 CG	334	goto done;
1da177e4 LT	335
	336	out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
	337	usbstat,
	338	(usbstat & USBSTS_HCH) ? "HCHalted " : "",
	339	(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
	340	(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
	341	(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
	342	(usbstat & USBSTS_ERROR) ? "USBError " : "",
	343	(usbstat & USBSTS_USBINT) ? "USBINT " : "");
13996ca7 CG	344	if (out - buf > len)
13996ca7 CG	345	goto done;
1da177e4 LT	346
	347	out += sprintf(out, " usbint = %04x\n", usbint);
	348	out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
	349	0xfff & (4*(unsigned int)usbfrnum));
	350	out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
	351	out += sprintf(out, " sof = %02x\n", sof);
13996ca7 CG	352	if (out - buf > len)
	353	goto done;
	354
	355	out += uhci_show_sc(1, portsc1, out);
	356	if (out - buf > len)
	357	goto done;
	358
	359	out += uhci_show_sc(2, portsc2, out);
	360	if (out - buf > len)
	361	goto done;
	362
	363	out += sprintf(out,
	364	"Most recent frame: %x (%d) Last ISO frame: %x (%d)\n",
c8155cc5 AS	365	uhci->frame_number, uhci->frame_number & 1023,
c8155cc5 AS	366	uhci->last_iso_frame, uhci->last_iso_frame & 1023);
1da177e4	367
13996ca7 CG	368	done:
	369	if (out - buf > len)
	370	out += sprintf(out, " ...\n");
1da177e4 LT	371	return out - buf;
	372	}
	373
1da177e4 LT	374	static int uhci_sprint_schedule(struct uhci_hcd uhci, char buf, int len)
1da177e4 LT	375	{
1da177e4 LT	376	char *out = buf;
	377	int i, j;
	378	struct uhci_qh *qh;
	379	struct uhci_td *td;
	380	struct list_head tmp, head;
f3fe239b	381	int nframes, nerrs;
51e2f62f JA	382	__hc32 link;
51e2f62f JA	383	__hc32 fsbr_link;
17230acd AS	384
	385	static const char * const qh_names[] = {
	386	"unlink", "iso", "int128", "int64", "int32", "int16",
	387	"int8", "int4", "int2", "async", "term"
	388	};
1da177e4	389
13996ca7 CG	390	out += uhci_show_root_hub_state(uhci, out);
	391	if (out - buf > len)
	392	goto done;
1da177e4 LT	393	out += sprintf(out, "HC status\n");
1da177e4 LT	394	out += uhci_show_status(uhci, out, len - (out - buf));
13996ca7 CG	395	if (out - buf > len)
13996ca7 CG	396	goto tail;
3ca2a321 AS	397
	398	out += sprintf(out, "Periodic load table\n");
	399	for (i = 0; i < MAX_PHASE; ++i) {
	400	out += sprintf(out, "\t%d", uhci->load[i]);
	401	if (i % 8 == 7)
	402	*out++ = '\n';
	403	}
	404	out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
	405	uhci->total_load,
	406	uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
	407	uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
dccf4a48	408	if (debug <= 1)
13996ca7	409	goto tail;
1da177e4 LT	410
1da177e4 LT	411	out += sprintf(out, "Frame List\n");
f3fe239b AS	412	nframes = 10;
f3fe239b AS	413	nerrs = 0;
1da177e4	414	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
51e2f62f	415	__hc32 qh_dma;
f3fe239b	416
13996ca7 CG	417	if (out - buf > len)
13996ca7 CG	418	goto done;
f3fe239b	419	j = 0;
a1d59ce8	420	td = uhci->frame_cpu[i];
f3fe239b	421	link = uhci->frame[i];
1da177e4	422	if (!td)
f3fe239b	423	goto check_link;
1da177e4	424
f3fe239b AS	425	if (nframes > 0) {
f3fe239b AS	426	out += sprintf(out, "- Frame %d -> (%08x)\n",
51e2f62f	427	i, hc32_to_cpu(uhci, link));
f3fe239b AS	428	j = 1;
f3fe239b AS	429	}
1da177e4 LT	430
	431	head = &td->fl_list;
	432	tmp = head;
	433	do {
	434	td = list_entry(tmp, struct uhci_td, fl_list);
	435	tmp = tmp->next;
51e2f62f	436	if (link != LINK_TO_TD(uhci, td)) {
13996ca7	437	if (nframes > 0) {
3171fcab CG	438	out += sprintf(out,
3171fcab CG	439	" link does not match list entry!\n");
13996ca7 CG	440	if (out - buf > len)
	441	goto done;
	442	} else
f3fe239b AS	443	++nerrs;
f3fe239b AS	444	}
13996ca7	445	if (nframes > 0) {
51e2f62f	446	out += uhci_show_td(uhci, td, out,
f3fe239b	447	len - (out - buf), 4);
13996ca7 CG	448	if (out - buf > len)
	449	goto tail;
	450	}
f3fe239b	451	link = td->link;
1da177e4	452	} while (tmp != head);
f3fe239b AS	453
	454	check_link:
	455	qh_dma = uhci_frame_skel_link(uhci, i);
	456	if (link != qh_dma) {
	457	if (nframes > 0) {
	458	if (!j) {
	459	out += sprintf(out,
	460	"- Frame %d -> (%08x)\n",
51e2f62f	461	i, hc32_to_cpu(uhci, link));
f3fe239b AS	462	j = 1;
f3fe239b AS	463	}
3171fcab CG	464	out += sprintf(out,
3171fcab CG	465	" link does not match QH (%08x)!\n",
51e2f62f	466	hc32_to_cpu(uhci, qh_dma));
13996ca7 CG	467	if (out - buf > len)
13996ca7 CG	468	goto done;
f3fe239b AS	469	} else
	470	++nerrs;
	471	}
	472	nframes -= j;
1da177e4	473	}
f3fe239b AS	474	if (nerrs > 0)
f3fe239b AS	475	out += sprintf(out, "Skipped %d bad links\n", nerrs);
1da177e4	476
687f5f34	477	out += sprintf(out, "Skeleton QHs\n");
1da177e4	478
13996ca7 CG	479	if (out - buf > len)
	480	goto done;
	481
e009f1b2	482	fsbr_link = 0;
1da177e4	483	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
dccf4a48	484	int cnt = 0;
1da177e4 LT	485
1da177e4 LT	486	qh = uhci->skelqh[i];
3171fcab	487	out += sprintf(out, "- skel_%s_qh\n", qh_names[i]);
e009f1b2	488	out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
13996ca7 CG	489	if (out - buf > len)
13996ca7 CG	490	goto tail;
1da177e4 LT	491
1da177e4 LT	492	/* Last QH is the Terminating QH, it's different */
17230acd	493	if (i == SKEL_TERM) {
13996ca7	494	if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) {
3171fcab CG	495	out += sprintf(out,
3171fcab CG	496	" skel_term_qh element is not set to term_td!\n");
13996ca7 CG	497	if (out - buf > len)
	498	goto done;
	499	}
e009f1b2 AS	500	link = fsbr_link;
e009f1b2 AS	501	if (!link)
51e2f62f	502	link = LINK_TO_QH(uhci, uhci->skel_term_qh);
e009f1b2	503	goto check_qh_link;
1da177e4 LT	504	}
1da177e4 LT	505
dccf4a48	506	head = &qh->node;
1da177e4 LT	507	tmp = head->next;
	508
	509	while (tmp != head) {
dccf4a48	510	qh = list_entry(tmp, struct uhci_qh, node);
1da177e4	511	tmp = tmp->next;
13996ca7	512	if (++cnt <= 10) {
e009f1b2	513	out += uhci_show_qh(uhci, qh, out,
dccf4a48	514	len - (out - buf), 4);
13996ca7 CG	515	if (out - buf > len)
	516	goto tail;
	517	}
17230acd	518	if (!fsbr_link && qh->skel >= SKEL_FSBR)
51e2f62f	519	fsbr_link = LINK_TO_QH(uhci, qh);
1da177e4	520	}
dccf4a48 AS	521	if ((cnt -= 10) > 0)
dccf4a48 AS	522	out += sprintf(out, " Skipped %d QHs\n", cnt);
1da177e4	523
51e2f62f	524	link = UHCI_PTR_TERM(uhci);
17230acd AS	525	if (i <= SKEL_ISO)
	526	;
	527	else if (i < SKEL_ASYNC)
51e2f62f	528	link = LINK_TO_QH(uhci, uhci->skel_async_qh);
17230acd AS	529	else if (!uhci->fsbr_is_on)
17230acd AS	530	;
17230acd	531	else
51e2f62f	532	link = LINK_TO_QH(uhci, uhci->skel_term_qh);
17230acd AS	533	check_qh_link:
17230acd AS	534	if (qh->link != link)
3171fcab CG	535	out += sprintf(out,
3171fcab CG	536	" last QH not linked to next skeleton!\n");
13996ca7 CG	537
	538	if (out - buf > len)
	539	goto done;
1da177e4 LT	540	}
1da177e4 LT	541
13996ca7 CG	542	done:
	543	if (out - buf > len)
	544	out += sprintf(out, " ...\n");
	545	tail:
1da177e4 LT	546	return out - buf;
	547	}
	548
8d402e1a AS	549	#ifdef CONFIG_DEBUG_FS
8d402e1a AS	550
1da177e4 LT	551	#define MAX_OUTPUT (64 * 1024)
	552
	553	struct uhci_debug {
	554	int size;
	555	char *data;
1da177e4 LT	556	};
	557
	558	static int uhci_debug_open(struct inode inode, struct file file)
	559	{
8e18e294	560	struct uhci_hcd *uhci = inode->i_private;
1da177e4	561	struct uhci_debug *up;
dccf4a48	562	unsigned long flags;
1da177e4	563
1da177e4 LT	564	up = kmalloc(sizeof(*up), GFP_KERNEL);
1da177e4 LT	565	if (!up)
00b81fb2	566	return -ENOMEM;
1da177e4 LT	567
	568	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	569	if (!up->data) {
	570	kfree(up);
00b81fb2	571	return -ENOMEM;
1da177e4 LT	572	}
1da177e4 LT	573
8d402e1a	574	up->size = 0;
dccf4a48	575	spin_lock_irqsave(&uhci->lock, flags);
8d402e1a	576	if (uhci->is_initialized)
13996ca7 CG	577	up->size = uhci_sprint_schedule(uhci, up->data,
13996ca7 CG	578	MAX_OUTPUT - EXTRA_SPACE);
dccf4a48	579	spin_unlock_irqrestore(&uhci->lock, flags);
1da177e4 LT	580
	581	file->private_data = up;
	582
00b81fb2	583	return 0;
1da177e4 LT	584	}
	585
	586	static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
	587	{
b25472f9 AV	588	struct uhci_debug *up = file->private_data;
b25472f9 AV	589	return no_seek_end_llseek_size(file, off, whence, up->size);
1da177e4 LT	590	}
	591
	592	static ssize_t uhci_debug_read(struct file file, char __user buf,
	593	size_t nbytes, loff_t *ppos)
	594	{
	595	struct uhci_debug *up = file->private_data;
	596	return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
	597	}
	598
	599	static int uhci_debug_release(struct inode inode, struct file file)
	600	{
	601	struct uhci_debug *up = file->private_data;
	602
	603	kfree(up->data);
	604	kfree(up);
	605
	606	return 0;
	607	}
	608
066202dd	609	static const struct file_operations uhci_debug_operations = {
8d402e1a	610	.owner = THIS_MODULE,
1da177e4 LT	611	.open = uhci_debug_open,
	612	.llseek = uhci_debug_lseek,
	613	.read = uhci_debug_read,
	614	.release = uhci_debug_release,
	615	};
b409214c	616	#define UHCI_DEBUG_OPS
1da177e4	617
8d402e1a	618	#endif /* CONFIG_DEBUG_FS */
1da177e4	619
1c20163d	620	#else /* CONFIG_DYNAMIC_DEBUG*/
8d402e1a AS	621
	622	static inline void lprintk(char *buf)
	623	{}
	624
e009f1b2 AS	625	static inline int uhci_show_qh(struct uhci_hcd *uhci,
e009f1b2 AS	626	struct uhci_qh qh, char buf, int len, int space)
8d402e1a AS	627	{
	628	return 0;
	629	}
	630
	631	static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
	632	char *buf, int len)
	633	{
	634	return 0;
	635	}
1da177e4 LT	636
1da177e4 LT	637	#endif