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

#include "uhci-hcd.h"

#define uhci_debug_operations (* (const struct file_operations *) NULL)
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_td *td, char *buf, int len, int space)
{
	char *out = buf;
	char *spid;
	u32 status, token;

	/* Try to make sure there's enough memory */
	if (len < 160)
		return 0;

	status = td_status(td);
	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(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);

	token = td_token(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", le32_to_cpu(td->buffer));

	return out - buf;
}

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

	if (len < 200)
		return 0;

	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"));

	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", urbp->urb->actual_length);

	if (urbp->urb->status != -EINPROGRESS)
		out += sprintf(out, " Status=%d", urbp->urb->status);
	out += sprintf(out, "\n");

	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(td, out, len - (out - buf), 0);
		} else {
			if (td_status(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);

	return out - buf;
}

static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
{
	char *out = buf;
	int i, nurbs;
	__le32 element = qh_element(qh);
	char *qtype;

	/* Try to make sure there's enough memory */
	if (len < 80 * 7)
		return 0;

	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,
			le32_to_cpu(qh->link), le32_to_cpu(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 (element & UHCI_PTR_QH)
		out += sprintf(out, "%*s  Element points to QH (bug?)\n", space, "");

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

	if (element & cpu_to_le32(8))
		out += sprintf(out, "%*s  Bit 3 set (bug?)\n", space, "");

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

	if (list_empty(&qh->queue)) {
		out += sprintf(out, "%*s  queue is empty\n", space, "");
	} 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(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(urbp, out,
						len - (out - buf), space + 2);
			else
				++nurbs;
		}
		if (nurbs > 0)
			out += sprintf(out, "%*s Skipped %d URBs\n",
					space, "", nurbs);
	}

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

	return out - buf;
}

static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
{
	char *out = buf;

	/* Try to make sure there's enough memory */
	if (len < 160)
		return 0;

	out += sprintf(out, "  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" : "");

	return out - buf;
}

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

	/* Try to make sure there's enough memory */
	if (len < 60)
		return 0;

	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;
	}
	out += sprintf(out, "Root-hub state: %s   FSBR: %d\n",
			rh_state, uhci->fsbr_is_on);
	return out - buf;
}

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

	/* Try to make sure there's enough memory */
	if (len < 80 * 9)
		return 0;

	usbcmd    = inw(io_addr + 0);
	usbstat   = inw(io_addr + 2);
	usbint    = inw(io_addr + 4);
	usbfrnum  = inw(io_addr + 6);
	flbaseadd = inl(io_addr + 8);
	sof       = inb(io_addr + 12);
	portsc1   = inw(io_addr + 16);
	portsc2   = inw(io_addr + 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 " : "");

	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 " : "");

	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);
	out += uhci_show_sc(1, portsc1, out, len - (out - buf));
	out += uhci_show_sc(2, portsc2, out, len - (out - buf));
	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);

	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;
	__le32 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, len - (out - buf));
	out += sprintf(out, "HC status\n");
	out += uhci_show_status(uhci, out, len - (out - buf));

	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)
		return out - buf;

	out += sprintf(out, "Frame List\n");
	nframes = 10;
	nerrs = 0;
	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
		__le32 qh_dma;

		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, le32_to_cpu(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(td)) {
				if (nframes > 0)
					out += sprintf(out, "    link does "
						"not match list entry!\n");
				else
					++nerrs;
			}
			if (nframes > 0)
				out += uhci_show_td(td, out,
						len - (out - buf), 4);
			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, le32_to_cpu(link));
					j = 1;
				}
				out += sprintf(out, "   link does not match "
					"QH (%08x)!\n", le32_to_cpu(qh_dma));
			} else
				++nerrs;
		}
		nframes -= j;
	}
	if (nerrs > 0)
		out += sprintf(out, "Skipped %d bad links\n", nerrs);

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

	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
		int cnt = 0;
		__le32 fsbr_link = 0;

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

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

		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(qh, out,
						len - (out - buf), 4);
			if (!fsbr_link && qh->skel >= SKEL_FSBR)
				fsbr_link = LINK_TO_QH(qh);
		}
		if ((cnt -= 10) > 0)
			out += sprintf(out, "    Skipped %d QHs\n", cnt);

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

	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;
	int ret = -ENOMEM;
	unsigned long flags;

	lock_kernel();
	up = kmalloc(sizeof(*up), GFP_KERNEL);
	if (!up)
		goto out;

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

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

	file->private_data = up;

	ret = 0;
out:
	unlock_kernel();
	return ret;
}

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

	lock_kernel();
	up = file->private_data;

	switch (whence) {
	case 0:
		new = off;
		break;
	case 1:
		new = file->f_pos + off;
		break;
	}
	if (new < 0 || new > up->size) {
		unlock_kernel();
		return -EINVAL;
	}
	unlock_kernel();
	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;
}

#undef uhci_debug_operations
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,
};

#endif	/* CONFIG_DEBUG_FS */

#else	/* DEBUG */

static inline void lprintk(char *buf)
{}

static inline int uhci_show_qh(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
1da177e4 LT	12	#include <linux/kernel.h>
	13	#include <linux/debugfs.h>
	14	#include <linux/smp_lock.h>
	15	#include <asm/io.h>
	16
	17	#include "uhci-hcd.h"
	18
066202dd	19	#define uhci_debug_operations (* (const struct file_operations *) NULL)
8d402e1a AS	20	static struct dentry *uhci_debugfs_root;
	21
	22	#ifdef DEBUG
1da177e4	23
687f5f34	24	/* Handle REALLY large printks so we don't overflow buffers */
8d402e1a	25	static void lprintk(char *buf)
1da177e4 LT	26	{
	27	char *p;
	28
	29	/* Just write one line at a time */
	30	while (buf) {
	31	p = strchr(buf, '\n');
	32	if (p)
	33	*p = 0;
	34	printk(KERN_DEBUG "%s\n", buf);
	35	buf = p;
	36	if (buf)
	37	buf++;
	38	}
	39	}
	40
	41	static int uhci_show_td(struct uhci_td td, char buf, int len, int space)
	42	{
	43	char *out = buf;
	44	char *spid;
	45	u32 status, token;
	46
	47	/* Try to make sure there's enough memory */
	48	if (len < 160)
	49	return 0;
	50
	51	status = td_status(td);
	52	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
	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);
	66
	67	token = td_token(td);
	68	switch (uhci_packetid(token)) {
	69	case USB_PID_SETUP:
	70	spid = "SETUP";
	71	break;
	72	case USB_PID_OUT:
	73	spid = "OUT";
	74	break;
	75	case USB_PID_IN:
	76	spid = "IN";
	77	break;
	78	default:
	79	spid = "?";
	80	break;
	81	}
	82
	83	out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
	84	token >> 21,
	85	((token >> 19) & 1),
	86	(token >> 15) & 15,
	87	(token >> 8) & 127,
	88	(token & 0xff),
	89	spid);
90	out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
91
92	return out - buf;
93	}
94
dccf4a48	95	static int uhci_show_urbp(struct urb_priv urbp, char buf, int len, int space)
1da177e4 LT	96	{
1da177e4 LT	97	char *out = buf;
1da177e4	98	struct uhci_td *td;
dccf4a48	99	int i, nactive, ninactive;
4de7d2c2	100	char *ptype;
dccf4a48 AS	101
	102	if (len < 200)
	103	return 0;
	104
	105	out += sprintf(out, "urb_priv [%p] ", urbp);
	106	out += sprintf(out, "urb [%p] ", urbp->urb);
	107	out += sprintf(out, "qh [%p] ", urbp->qh);
	108	out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
	109	out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
	110	(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
	111
	112	switch (usb_pipetype(urbp->urb->pipe)) {
4de7d2c2 AS	113	case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
	114	case PIPE_INTERRUPT: ptype = "INT"; break;
	115	case PIPE_BULK: ptype = "BLK"; break;
	116	default:
	117	case PIPE_CONTROL: ptype = "CTL"; break;
dccf4a48 AS	118	}
dccf4a48 AS	119
4de7d2c2	120	out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
59e29ed9	121	out += sprintf(out, " Actlen=%d", urbp->urb->actual_length);
dccf4a48 AS	122
	123	if (urbp->urb->status != -EINPROGRESS)
	124	out += sprintf(out, " Status=%d", urbp->urb->status);
	125	out += sprintf(out, "\n");
	126
	127	i = nactive = ninactive = 0;
	128	list_for_each_entry(td, &urbp->td_list, list) {
c8155cc5 AS	129	if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
c8155cc5 AS	130	(++i <= 10 \|\| debug > 2)) {
dccf4a48 AS	131	out += sprintf(out, "%*s%d: ", space + 2, "", i);
	132	out += uhci_show_td(td, out, len - (out - buf), 0);
	133	} else {
	134	if (td_status(td) & TD_CTRL_ACTIVE)
	135	++nactive;
	136	else
	137	++ninactive;
	138	}
	139	}
	140	if (nactive + ninactive > 0)
	141	out += sprintf(out, "%*s[skipped %d inactive and %d active "
	142	"TDs]\n",
	143	space, "", ninactive, nactive);
	144
	145	return out - buf;
	146	}
	147
	148	static int uhci_show_qh(struct uhci_qh qh, char buf, int len, int space)
	149	{
	150	char *out = buf;
	151	int i, nurbs;
1da177e4	152	__le32 element = qh_element(qh);
4de7d2c2	153	char *qtype;
1da177e4 LT	154
1da177e4 LT	155	/* Try to make sure there's enough memory */
caf3827a	156	if (len < 80 * 7)
1da177e4 LT	157	return 0;
1da177e4 LT	158
4de7d2c2 AS	159	switch (qh->type) {
	160	case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
	161	case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
	162	case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
	163	case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
	164	default: qtype = "Skel" ; break;
	165	}
	166
	167	out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
	168	space, "", qh, qtype,
	169	le32_to_cpu(qh->link), le32_to_cpu(element));
caf3827a	170	if (qh->type == USB_ENDPOINT_XFER_ISOC)
3ca2a321 AS	171	out += sprintf(out, "%*s period %d phase %d load %d us, "
	172	"frame %x desc [%p]\n",
	173	space, "", qh->period, qh->phase, qh->load,
	174	qh->iso_frame, qh->iso_packet_desc);
	175	else if (qh->type == USB_ENDPOINT_XFER_INT)
	176	out += sprintf(out, "%*s period %d phase %d load %d us\n",
	177	space, "", qh->period, qh->phase, qh->load);
1da177e4 LT	178
	179	if (element & UHCI_PTR_QH)
	180	out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
	181
	182	if (element & UHCI_PTR_DEPTH)
	183	out += sprintf(out, "%*s Depth traverse\n", space, "");
	184
	185	if (element & cpu_to_le32(8))
	186	out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
	187
	188	if (!(element & ~(UHCI_PTR_QH \| UHCI_PTR_DEPTH)))
	189	out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
	190
dccf4a48 AS	191	if (list_empty(&qh->queue)) {
	192	out += sprintf(out, "%*s queue is empty\n", space, "");
	193	} else {
	194	struct urb_priv *urbp = list_entry(qh->queue.next,
	195	struct urb_priv, node);
	196	struct uhci_td *td = list_entry(urbp->td_list.next,
	197	struct uhci_td, list);
	198
28b9325e	199	if (element != LINK_TO_TD(td))
dccf4a48 AS	200	out += sprintf(out, "%*s Element != First TD\n",
	201	space, "");
	202	i = nurbs = 0;
	203	list_for_each_entry(urbp, &qh->queue, node) {
	204	if (++i <= 10)
	205	out += uhci_show_urbp(urbp, out,
	206	len - (out - buf), space + 2);
	207	else
	208	++nurbs;
1da177e4	209	}
dccf4a48 AS	210	if (nurbs > 0)
	211	out += sprintf(out, "%*s Skipped %d URBs\n",
	212	space, "", nurbs);
1da177e4 LT	213	}
1da177e4 LT	214
85a975d0	215	if (qh->dummy_td) {
af0bb599 AS	216	out += sprintf(out, "%*s Dummy TD\n", space, "");
	217	out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
	218	}
	219
1da177e4 LT	220	return out - buf;
	221	}
	222
1da177e4 LT	223	static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
	224	{
	225	char *out = buf;
	226
	227	/* Try to make sure there's enough memory */
	228	if (len < 160)
	229	return 0;
	230
	231	out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
	232	port,
	233	status,
	234	(status & USBPORTSC_SUSP) ? " Suspend" : "",
	235	(status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
	236	(status & USBPORTSC_OC) ? " OverCurrent" : "",
	237	(status & USBPORTSC_PR) ? " Reset" : "",
	238	(status & USBPORTSC_LSDA) ? " LowSpeed" : "",
	239	(status & USBPORTSC_RD) ? " ResumeDetect" : "",
	240	(status & USBPORTSC_PEC) ? " EnableChange" : "",
	241	(status & USBPORTSC_PE) ? " Enabled" : "",
	242	(status & USBPORTSC_CSC) ? " ConnectChange" : "",
	243	(status & USBPORTSC_CCS) ? " Connected" : "");
	244
	245	return out - buf;
	246	}
	247
c8f4fe43 AS	248	static int uhci_show_root_hub_state(struct uhci_hcd uhci, char buf, int len)
	249	{
	250	char *out = buf;
	251	char *rh_state;
	252
	253	/* Try to make sure there's enough memory */
	254	if (len < 60)
	255	return 0;
	256
	257	switch (uhci->rh_state) {
	258	case UHCI_RH_RESET:
	259	rh_state = "reset"; break;
	260	case UHCI_RH_SUSPENDED:
	261	rh_state = "suspended"; break;
	262	case UHCI_RH_AUTO_STOPPED:
	263	rh_state = "auto-stopped"; break;
	264	case UHCI_RH_RESUMING:
	265	rh_state = "resuming"; break;
	266	case UHCI_RH_SUSPENDING:
	267	rh_state = "suspending"; break;
	268	case UHCI_RH_RUNNING:
	269	rh_state = "running"; break;
	270	case UHCI_RH_RUNNING_NODEVS:
	271	rh_state = "running, no devs"; break;
	272	default:
	273	rh_state = "?"; break;
	274	}
84afddd7 AS	275	out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
84afddd7 AS	276	rh_state, uhci->fsbr_is_on);
c8f4fe43 AS	277	return out - buf;
	278	}
	279
1da177e4 LT	280	static int uhci_show_status(struct uhci_hcd uhci, char buf, int len)
	281	{
	282	char *out = buf;
	283	unsigned long io_addr = uhci->io_addr;
	284	unsigned short usbcmd, usbstat, usbint, usbfrnum;
	285	unsigned int flbaseadd;
	286	unsigned char sof;
	287	unsigned short portsc1, portsc2;
	288
	289	/* Try to make sure there's enough memory */
c4334726	290	if (len < 80 * 9)
1da177e4 LT	291	return 0;
	292
	293	usbcmd = inw(io_addr + 0);
	294	usbstat = inw(io_addr + 2);
	295	usbint = inw(io_addr + 4);
	296	usbfrnum = inw(io_addr + 6);
	297	flbaseadd = inl(io_addr + 8);
	298	sof = inb(io_addr + 12);
	299	portsc1 = inw(io_addr + 16);
	300	portsc2 = inw(io_addr + 18);
	301
	302	out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
	303	usbcmd,
	304	(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
	305	(usbcmd & USBCMD_CF) ? "CF " : "",
	306	(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
	307	(usbcmd & USBCMD_FGR) ? "FGR " : "",
	308	(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
	309	(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
	310	(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
	311	(usbcmd & USBCMD_RS) ? "RS " : "");
	312
	313	out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
	314	usbstat,
	315	(usbstat & USBSTS_HCH) ? "HCHalted " : "",
	316	(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
	317	(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
	318	(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
	319	(usbstat & USBSTS_ERROR) ? "USBError " : "",
	320	(usbstat & USBSTS_USBINT) ? "USBINT " : "");
	321
	322	out += sprintf(out, " usbint = %04x\n", usbint);
	323	out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
	324	0xfff & (4*(unsigned int)usbfrnum));
	325	out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
	326	out += sprintf(out, " sof = %02x\n", sof);
	327	out += uhci_show_sc(1, portsc1, out, len - (out - buf));
	328	out += uhci_show_sc(2, portsc2, out, len - (out - buf));
c8155cc5 AS	329	out += sprintf(out, "Most recent frame: %x (%d) "
	330	"Last ISO frame: %x (%d)\n",
	331	uhci->frame_number, uhci->frame_number & 1023,
	332	uhci->last_iso_frame, uhci->last_iso_frame & 1023);
1da177e4 LT	333
	334	return out - buf;
	335	}
	336
1da177e4 LT	337	static int uhci_sprint_schedule(struct uhci_hcd uhci, char buf, int len)
1da177e4 LT	338	{
1da177e4 LT	339	char *out = buf;
	340	int i, j;
	341	struct uhci_qh *qh;
	342	struct uhci_td *td;
	343	struct list_head tmp, head;
f3fe239b	344	int nframes, nerrs;
17230acd AS	345	__le32 link;
	346
	347	static const char * const qh_names[] = {
	348	"unlink", "iso", "int128", "int64", "int32", "int16",
	349	"int8", "int4", "int2", "async", "term"
	350	};
1da177e4	351
c8f4fe43	352	out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
1da177e4 LT	353	out += sprintf(out, "HC status\n");
1da177e4 LT	354	out += uhci_show_status(uhci, out, len - (out - buf));
3ca2a321 AS	355
	356	out += sprintf(out, "Periodic load table\n");
	357	for (i = 0; i < MAX_PHASE; ++i) {
	358	out += sprintf(out, "\t%d", uhci->load[i]);
	359	if (i % 8 == 7)
	360	*out++ = '\n';
	361	}
	362	out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
	363	uhci->total_load,
	364	uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
	365	uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
dccf4a48 AS	366	if (debug <= 1)
dccf4a48 AS	367	return out - buf;
1da177e4 LT	368
1da177e4 LT	369	out += sprintf(out, "Frame List\n");
f3fe239b AS	370	nframes = 10;
f3fe239b AS	371	nerrs = 0;
1da177e4	372	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
17230acd	373	__le32 qh_dma;
f3fe239b AS	374
f3fe239b AS	375	j = 0;
a1d59ce8	376	td = uhci->frame_cpu[i];
f3fe239b	377	link = uhci->frame[i];
1da177e4	378	if (!td)
f3fe239b	379	goto check_link;
1da177e4	380
f3fe239b AS	381	if (nframes > 0) {
	382	out += sprintf(out, "- Frame %d -> (%08x)\n",
	383	i, le32_to_cpu(link));
	384	j = 1;
	385	}
1da177e4 LT	386
	387	head = &td->fl_list;
	388	tmp = head;
	389	do {
	390	td = list_entry(tmp, struct uhci_td, fl_list);
	391	tmp = tmp->next;
28b9325e	392	if (link != LINK_TO_TD(td)) {
f3fe239b AS	393	if (nframes > 0)
	394	out += sprintf(out, " link does "
	395	"not match list entry!\n");
	396	else
	397	++nerrs;
	398	}
	399	if (nframes > 0)
	400	out += uhci_show_td(td, out,
	401	len - (out - buf), 4);
	402	link = td->link;
1da177e4	403	} while (tmp != head);
f3fe239b AS	404
	405	check_link:
	406	qh_dma = uhci_frame_skel_link(uhci, i);
	407	if (link != qh_dma) {
	408	if (nframes > 0) {
	409	if (!j) {
	410	out += sprintf(out,
	411	"- Frame %d -> (%08x)\n",
	412	i, le32_to_cpu(link));
	413	j = 1;
	414	}
	415	out += sprintf(out, " link does not match "
	416	"QH (%08x)!\n", le32_to_cpu(qh_dma));
	417	} else
	418	++nerrs;
	419	}
	420	nframes -= j;
1da177e4	421	}
f3fe239b AS	422	if (nerrs > 0)
f3fe239b AS	423	out += sprintf(out, "Skipped %d bad links\n", nerrs);
1da177e4	424
687f5f34	425	out += sprintf(out, "Skeleton QHs\n");
1da177e4 LT	426
1da177e4 LT	427	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
dccf4a48	428	int cnt = 0;
17230acd	429	__le32 fsbr_link = 0;
1da177e4 LT	430
1da177e4 LT	431	qh = uhci->skelqh[i];
17230acd	432	out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
dccf4a48	433	out += uhci_show_qh(qh, out, len - (out - buf), 4);
1da177e4 LT	434
1da177e4 LT	435	/* Last QH is the Terminating QH, it's different */
17230acd	436	if (i == SKEL_TERM) {
28b9325e	437	if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
1da177e4	438	out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
17230acd AS	439	if (link == LINK_TO_QH(uhci->skel_term_qh))
17230acd AS	440	goto check_qh_link;
1da177e4 LT	441	continue;
	442	}
	443
dccf4a48	444	head = &qh->node;
1da177e4 LT	445	tmp = head->next;
	446
	447	while (tmp != head) {
dccf4a48	448	qh = list_entry(tmp, struct uhci_qh, node);
1da177e4	449	tmp = tmp->next;
dccf4a48 AS	450	if (++cnt <= 10)
	451	out += uhci_show_qh(qh, out,
	452	len - (out - buf), 4);
17230acd AS	453	if (!fsbr_link && qh->skel >= SKEL_FSBR)
17230acd AS	454	fsbr_link = LINK_TO_QH(qh);
1da177e4	455	}
dccf4a48 AS	456	if ((cnt -= 10) > 0)
dccf4a48 AS	457	out += sprintf(out, " Skipped %d QHs\n", cnt);
1da177e4	458
17230acd AS	459	link = UHCI_PTR_TERM;
	460	if (i <= SKEL_ISO)
	461	;
	462	else if (i < SKEL_ASYNC)
	463	link = LINK_TO_QH(uhci->skel_async_qh);
	464	else if (!uhci->fsbr_is_on)
	465	;
	466	else if (fsbr_link)
	467	link = fsbr_link;
	468	else
	469	link = LINK_TO_QH(uhci->skel_term_qh);
	470	check_qh_link:
	471	if (qh->link != link)
	472	out += sprintf(out, " last QH not linked to next skeleton!\n");
1da177e4 LT	473	}
1da177e4 LT	474
1da177e4 LT	475	return out - buf;
	476	}
	477
8d402e1a AS	478	#ifdef CONFIG_DEBUG_FS
8d402e1a AS	479
1da177e4 LT	480	#define MAX_OUTPUT (64 * 1024)
	481
	482	struct uhci_debug {
	483	int size;
	484	char *data;
1da177e4 LT	485	};
	486
	487	static int uhci_debug_open(struct inode inode, struct file file)
	488	{
8e18e294	489	struct uhci_hcd *uhci = inode->i_private;
1da177e4 LT	490	struct uhci_debug *up;
1da177e4 LT	491	int ret = -ENOMEM;
dccf4a48	492	unsigned long flags;
1da177e4 LT	493
	494	lock_kernel();
	495	up = kmalloc(sizeof(*up), GFP_KERNEL);
	496	if (!up)
	497	goto out;
	498
	499	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	500	if (!up->data) {
	501	kfree(up);
	502	goto out;
	503	}
	504
8d402e1a	505	up->size = 0;
dccf4a48	506	spin_lock_irqsave(&uhci->lock, flags);
8d402e1a AS	507	if (uhci->is_initialized)
8d402e1a AS	508	up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
dccf4a48	509	spin_unlock_irqrestore(&uhci->lock, flags);
1da177e4 LT	510
	511	file->private_data = up;
	512
	513	ret = 0;
	514	out:
	515	unlock_kernel();
	516	return ret;
	517	}
	518
	519	static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
	520	{
	521	struct uhci_debug *up;
	522	loff_t new = -1;
	523
	524	lock_kernel();
	525	up = file->private_data;
	526
	527	switch (whence) {
	528	case 0:
	529	new = off;
	530	break;
	531	case 1:
	532	new = file->f_pos + off;
	533	break;
	534	}
	535	if (new < 0 \|\| new > up->size) {
	536	unlock_kernel();
	537	return -EINVAL;
	538	}
	539	unlock_kernel();
	540	return (file->f_pos = new);
	541	}
	542
	543	static ssize_t uhci_debug_read(struct file file, char __user buf,
	544	size_t nbytes, loff_t *ppos)
	545	{
	546	struct uhci_debug *up = file->private_data;
	547	return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
	548	}
	549
	550	static int uhci_debug_release(struct inode inode, struct file file)
	551	{
	552	struct uhci_debug *up = file->private_data;
	553
	554	kfree(up->data);
	555	kfree(up);
	556
	557	return 0;
	558	}
	559
8d402e1a	560	#undef uhci_debug_operations
066202dd	561	static const struct file_operations uhci_debug_operations = {
8d402e1a	562	.owner = THIS_MODULE,
1da177e4 LT	563	.open = uhci_debug_open,
	564	.llseek = uhci_debug_lseek,
	565	.read = uhci_debug_read,
	566	.release = uhci_debug_release,
	567	};
	568
8d402e1a	569	#endif /* CONFIG_DEBUG_FS */
1da177e4	570
8d402e1a AS	571	#else /* DEBUG */
	572
	573	static inline void lprintk(char *buf)
	574	{}
	575
	576	static inline int uhci_show_qh(struct uhci_qh qh, char buf,
	577	int len, int space)
	578	{
	579	return 0;
	580	}
	581
	582	static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
	583	char *buf, int len)
	584	{
	585	return 0;
	586	}
1da177e4 LT	587
1da177e4 LT	588	#endif