[GitHub/mt8127/android_kernel_alcatel_ttab.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 <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%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");

	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_hcd *uhci,
		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, "");
		if (qh == uhci->skel_async_qh)
			out += uhci_show_td(uhci->term_td, out,
					len - (out - buf), 0);
	} 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;
	__le32 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, 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");

	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);

		/* 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");
			link = fsbr_link;
			if (!link)
				link = LINK_TO_QH(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 (!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
			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_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>
	14	#include <linux/debugfs.h>
	15	#include <linux/smp_lock.h>
	16	#include <asm/io.h>
	17
	18	#include "uhci-hcd.h"
	19
066202dd	20	#define uhci_debug_operations (* (const struct file_operations *) NULL)
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
	42	static int uhci_show_td(struct uhci_td td, char buf, int len, int space)
	43	{
	44	char *out = buf;
	45	char *spid;
	46	u32 status, token;
	47
	48	/* Try to make sure there's enough memory */
	49	if (len < 160)
	50	return 0;
	51
	52	status = td_status(td);
	53	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
	54	out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
	55	((status >> 27) & 3),
	56	(status & TD_CTRL_SPD) ? "SPD " : "",
	57	(status & TD_CTRL_LS) ? "LS " : "",
	58	(status & TD_CTRL_IOC) ? "IOC " : "",
	59	(status & TD_CTRL_ACTIVE) ? "Active " : "",
	60	(status & TD_CTRL_STALLED) ? "Stalled " : "",
	61	(status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
	62	(status & TD_CTRL_BABBLE) ? "Babble " : "",
	63	(status & TD_CTRL_NAK) ? "NAK " : "",
	64	(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
	65	(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
	66	status & 0x7ff);
	67
	68	token = td_token(td);
	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);
91	out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
92
93	return out - buf;
94	}
95
dccf4a48	96	static int uhci_show_urbp(struct urb_priv urbp, char buf, int len, int space)
1da177e4 LT	97	{
1da177e4 LT	98	char *out = buf;
1da177e4	99	struct uhci_td *td;
dccf4a48	100	int i, nactive, ninactive;
4de7d2c2	101	char *ptype;
dccf4a48 AS	102
	103	if (len < 200)
	104	return 0;
	105
	106	out += sprintf(out, "urb_priv [%p] ", urbp);
	107	out += sprintf(out, "urb [%p] ", urbp->urb);
	108	out += sprintf(out, "qh [%p] ", urbp->qh);
	109	out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
	110	out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
	111	(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
	112
	113	switch (usb_pipetype(urbp->urb->pipe)) {
4de7d2c2 AS	114	case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
	115	case PIPE_INTERRUPT: ptype = "INT"; break;
	116	case PIPE_BULK: ptype = "BLK"; break;
	117	default:
	118	case PIPE_CONTROL: ptype = "CTL"; break;
dccf4a48 AS	119	}
dccf4a48 AS	120
4de7d2c2	121	out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
7ea0a2bc AS	122	out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
	123	(urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
	124	"-8" : ""));
dccf4a48	125
eb231054 AS	126	if (urbp->urb->unlinked)
eb231054 AS	127	out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
dccf4a48 AS	128	out += sprintf(out, "\n");
	129
	130	i = nactive = ninactive = 0;
	131	list_for_each_entry(td, &urbp->td_list, list) {
c8155cc5 AS	132	if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
c8155cc5 AS	133	(++i <= 10 \|\| debug > 2)) {
dccf4a48 AS	134	out += sprintf(out, "%*s%d: ", space + 2, "", i);
	135	out += uhci_show_td(td, out, len - (out - buf), 0);
	136	} else {
	137	if (td_status(td) & TD_CTRL_ACTIVE)
	138	++nactive;
	139	else
	140	++ninactive;
	141	}
	142	}
	143	if (nactive + ninactive > 0)
	144	out += sprintf(out, "%*s[skipped %d inactive and %d active "
	145	"TDs]\n",
	146	space, "", ninactive, nactive);
	147
	148	return out - buf;
	149	}
	150
e009f1b2 AS	151	static int uhci_show_qh(struct uhci_hcd *uhci,
e009f1b2 AS	152	struct uhci_qh qh, char buf, int len, int space)
dccf4a48 AS	153	{
	154	char *out = buf;
	155	int i, nurbs;
1da177e4	156	__le32 element = qh_element(qh);
4de7d2c2	157	char *qtype;
1da177e4 LT	158
1da177e4 LT	159	/* Try to make sure there's enough memory */
caf3827a	160	if (len < 80 * 7)
1da177e4 LT	161	return 0;
1da177e4 LT	162
4de7d2c2 AS	163	switch (qh->type) {
	164	case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
	165	case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
	166	case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
	167	case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
	168	default: qtype = "Skel" ; break;
	169	}
	170
	171	out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
	172	space, "", qh, qtype,
	173	le32_to_cpu(qh->link), le32_to_cpu(element));
caf3827a	174	if (qh->type == USB_ENDPOINT_XFER_ISOC)
3ca2a321 AS	175	out += sprintf(out, "%*s period %d phase %d load %d us, "
	176	"frame %x desc [%p]\n",
	177	space, "", qh->period, qh->phase, qh->load,
	178	qh->iso_frame, qh->iso_packet_desc);
	179	else if (qh->type == USB_ENDPOINT_XFER_INT)
	180	out += sprintf(out, "%*s period %d phase %d load %d us\n",
	181	space, "", qh->period, qh->phase, qh->load);
1da177e4 LT	182
	183	if (element & UHCI_PTR_QH)
	184	out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
	185
	186	if (element & UHCI_PTR_DEPTH)
	187	out += sprintf(out, "%*s Depth traverse\n", space, "");
	188
	189	if (element & cpu_to_le32(8))
	190	out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
	191
	192	if (!(element & ~(UHCI_PTR_QH \| UHCI_PTR_DEPTH)))
	193	out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
	194
dccf4a48 AS	195	if (list_empty(&qh->queue)) {
dccf4a48 AS	196	out += sprintf(out, "%*s queue is empty\n", space, "");
e009f1b2 AS	197	if (qh == uhci->skel_async_qh)
	198	out += uhci_show_td(uhci->term_td, out,
	199	len - (out - buf), 0);
dccf4a48 AS	200	} else {
	201	struct urb_priv *urbp = list_entry(qh->queue.next,
	202	struct urb_priv, node);
	203	struct uhci_td *td = list_entry(urbp->td_list.next,
	204	struct uhci_td, list);
	205
28b9325e	206	if (element != LINK_TO_TD(td))
dccf4a48 AS	207	out += sprintf(out, "%*s Element != First TD\n",
	208	space, "");
	209	i = nurbs = 0;
	210	list_for_each_entry(urbp, &qh->queue, node) {
	211	if (++i <= 10)
	212	out += uhci_show_urbp(urbp, out,
	213	len - (out - buf), space + 2);
	214	else
	215	++nurbs;
1da177e4	216	}
dccf4a48 AS	217	if (nurbs > 0)
	218	out += sprintf(out, "%*s Skipped %d URBs\n",
	219	space, "", nurbs);
1da177e4 LT	220	}
1da177e4 LT	221
85a975d0	222	if (qh->dummy_td) {
af0bb599 AS	223	out += sprintf(out, "%*s Dummy TD\n", space, "");
	224	out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
	225	}
	226
1da177e4 LT	227	return out - buf;
	228	}
	229
1da177e4 LT	230	static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
	231	{
	232	char *out = buf;
	233
	234	/* Try to make sure there's enough memory */
	235	if (len < 160)
	236	return 0;
	237
	238	out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
	239	port,
	240	status,
	241	(status & USBPORTSC_SUSP) ? " Suspend" : "",
	242	(status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
	243	(status & USBPORTSC_OC) ? " OverCurrent" : "",
	244	(status & USBPORTSC_PR) ? " Reset" : "",
	245	(status & USBPORTSC_LSDA) ? " LowSpeed" : "",
	246	(status & USBPORTSC_RD) ? " ResumeDetect" : "",
	247	(status & USBPORTSC_PEC) ? " EnableChange" : "",
	248	(status & USBPORTSC_PE) ? " Enabled" : "",
	249	(status & USBPORTSC_CSC) ? " ConnectChange" : "",
	250	(status & USBPORTSC_CCS) ? " Connected" : "");
	251
	252	return out - buf;
	253	}
	254
c8f4fe43 AS	255	static int uhci_show_root_hub_state(struct uhci_hcd uhci, char buf, int len)
	256	{
	257	char *out = buf;
	258	char *rh_state;
	259
	260	/* Try to make sure there's enough memory */
	261	if (len < 60)
	262	return 0;
	263
	264	switch (uhci->rh_state) {
	265	case UHCI_RH_RESET:
	266	rh_state = "reset"; break;
	267	case UHCI_RH_SUSPENDED:
	268	rh_state = "suspended"; break;
	269	case UHCI_RH_AUTO_STOPPED:
	270	rh_state = "auto-stopped"; break;
	271	case UHCI_RH_RESUMING:
	272	rh_state = "resuming"; break;
	273	case UHCI_RH_SUSPENDING:
	274	rh_state = "suspending"; break;
	275	case UHCI_RH_RUNNING:
	276	rh_state = "running"; break;
	277	case UHCI_RH_RUNNING_NODEVS:
	278	rh_state = "running, no devs"; break;
	279	default:
	280	rh_state = "?"; break;
	281	}
84afddd7 AS	282	out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
84afddd7 AS	283	rh_state, uhci->fsbr_is_on);
c8f4fe43 AS	284	return out - buf;
	285	}
	286
1da177e4 LT	287	static int uhci_show_status(struct uhci_hcd uhci, char buf, int len)
	288	{
	289	char *out = buf;
	290	unsigned long io_addr = uhci->io_addr;
	291	unsigned short usbcmd, usbstat, usbint, usbfrnum;
	292	unsigned int flbaseadd;
	293	unsigned char sof;
	294	unsigned short portsc1, portsc2;
	295
	296	/* Try to make sure there's enough memory */
c4334726	297	if (len < 80 * 9)
1da177e4 LT	298	return 0;
	299
	300	usbcmd = inw(io_addr + 0);
	301	usbstat = inw(io_addr + 2);
	302	usbint = inw(io_addr + 4);
	303	usbfrnum = inw(io_addr + 6);
	304	flbaseadd = inl(io_addr + 8);
	305	sof = inb(io_addr + 12);
	306	portsc1 = inw(io_addr + 16);
	307	portsc2 = inw(io_addr + 18);
	308
	309	out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
	310	usbcmd,
	311	(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
	312	(usbcmd & USBCMD_CF) ? "CF " : "",
	313	(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
	314	(usbcmd & USBCMD_FGR) ? "FGR " : "",
	315	(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
	316	(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
	317	(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
	318	(usbcmd & USBCMD_RS) ? "RS " : "");
	319
	320	out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
	321	usbstat,
	322	(usbstat & USBSTS_HCH) ? "HCHalted " : "",
	323	(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
	324	(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
	325	(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
	326	(usbstat & USBSTS_ERROR) ? "USBError " : "",
	327	(usbstat & USBSTS_USBINT) ? "USBINT " : "");
	328
	329	out += sprintf(out, " usbint = %04x\n", usbint);
	330	out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
	331	0xfff & (4*(unsigned int)usbfrnum));
	332	out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
	333	out += sprintf(out, " sof = %02x\n", sof);
	334	out += uhci_show_sc(1, portsc1, out, len - (out - buf));
	335	out += uhci_show_sc(2, portsc2, out, len - (out - buf));
c8155cc5 AS	336	out += sprintf(out, "Most recent frame: %x (%d) "
	337	"Last ISO frame: %x (%d)\n",
	338	uhci->frame_number, uhci->frame_number & 1023,
	339	uhci->last_iso_frame, uhci->last_iso_frame & 1023);
1da177e4 LT	340
	341	return out - buf;
	342	}
	343
1da177e4 LT	344	static int uhci_sprint_schedule(struct uhci_hcd uhci, char buf, int len)
1da177e4 LT	345	{
1da177e4 LT	346	char *out = buf;
	347	int i, j;
	348	struct uhci_qh *qh;
	349	struct uhci_td *td;
	350	struct list_head tmp, head;
f3fe239b	351	int nframes, nerrs;
17230acd	352	__le32 link;
e009f1b2	353	__le32 fsbr_link;
17230acd AS	354
	355	static const char * const qh_names[] = {
	356	"unlink", "iso", "int128", "int64", "int32", "int16",
	357	"int8", "int4", "int2", "async", "term"
	358	};
1da177e4	359
c8f4fe43	360	out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
1da177e4 LT	361	out += sprintf(out, "HC status\n");
1da177e4 LT	362	out += uhci_show_status(uhci, out, len - (out - buf));
3ca2a321 AS	363
	364	out += sprintf(out, "Periodic load table\n");
	365	for (i = 0; i < MAX_PHASE; ++i) {
	366	out += sprintf(out, "\t%d", uhci->load[i]);
	367	if (i % 8 == 7)
	368	*out++ = '\n';
	369	}
	370	out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
	371	uhci->total_load,
	372	uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
	373	uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
dccf4a48 AS	374	if (debug <= 1)
dccf4a48 AS	375	return out - buf;
1da177e4 LT	376
1da177e4 LT	377	out += sprintf(out, "Frame List\n");
f3fe239b AS	378	nframes = 10;
f3fe239b AS	379	nerrs = 0;
1da177e4	380	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
17230acd	381	__le32 qh_dma;
f3fe239b AS	382
f3fe239b AS	383	j = 0;
a1d59ce8	384	td = uhci->frame_cpu[i];
f3fe239b	385	link = uhci->frame[i];
1da177e4	386	if (!td)
f3fe239b	387	goto check_link;
1da177e4	388
f3fe239b AS	389	if (nframes > 0) {
	390	out += sprintf(out, "- Frame %d -> (%08x)\n",
	391	i, le32_to_cpu(link));
	392	j = 1;
	393	}
1da177e4 LT	394
	395	head = &td->fl_list;
	396	tmp = head;
	397	do {
	398	td = list_entry(tmp, struct uhci_td, fl_list);
	399	tmp = tmp->next;
28b9325e	400	if (link != LINK_TO_TD(td)) {
f3fe239b AS	401	if (nframes > 0)
	402	out += sprintf(out, " link does "
	403	"not match list entry!\n");
	404	else
	405	++nerrs;
	406	}
	407	if (nframes > 0)
	408	out += uhci_show_td(td, out,
	409	len - (out - buf), 4);
	410	link = td->link;
1da177e4	411	} while (tmp != head);
f3fe239b AS	412
	413	check_link:
	414	qh_dma = uhci_frame_skel_link(uhci, i);
	415	if (link != qh_dma) {
	416	if (nframes > 0) {
	417	if (!j) {
	418	out += sprintf(out,
	419	"- Frame %d -> (%08x)\n",
	420	i, le32_to_cpu(link));
	421	j = 1;
	422	}
	423	out += sprintf(out, " link does not match "
	424	"QH (%08x)!\n", le32_to_cpu(qh_dma));
	425	} else
	426	++nerrs;
	427	}
	428	nframes -= j;
1da177e4	429	}
f3fe239b AS	430	if (nerrs > 0)
f3fe239b AS	431	out += sprintf(out, "Skipped %d bad links\n", nerrs);
1da177e4	432
687f5f34	433	out += sprintf(out, "Skeleton QHs\n");
1da177e4	434
e009f1b2	435	fsbr_link = 0;
1da177e4	436	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
dccf4a48	437	int cnt = 0;
1da177e4 LT	438
1da177e4 LT	439	qh = uhci->skelqh[i];
17230acd	440	out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
e009f1b2	441	out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
1da177e4 LT	442
1da177e4 LT	443	/* Last QH is the Terminating QH, it's different */
17230acd	444	if (i == SKEL_TERM) {
28b9325e	445	if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
1da177e4	446	out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
e009f1b2 AS	447	link = fsbr_link;
	448	if (!link)
	449	link = LINK_TO_QH(uhci->skel_term_qh);
	450	goto check_qh_link;
1da177e4 LT	451	}
1da177e4 LT	452
dccf4a48	453	head = &qh->node;
1da177e4 LT	454	tmp = head->next;
	455
	456	while (tmp != head) {
dccf4a48	457	qh = list_entry(tmp, struct uhci_qh, node);
1da177e4	458	tmp = tmp->next;
dccf4a48	459	if (++cnt <= 10)
e009f1b2	460	out += uhci_show_qh(uhci, qh, out,
dccf4a48	461	len - (out - buf), 4);
17230acd AS	462	if (!fsbr_link && qh->skel >= SKEL_FSBR)
17230acd AS	463	fsbr_link = LINK_TO_QH(qh);
1da177e4	464	}
dccf4a48 AS	465	if ((cnt -= 10) > 0)
dccf4a48 AS	466	out += sprintf(out, " Skipped %d QHs\n", cnt);
1da177e4	467
17230acd AS	468	link = UHCI_PTR_TERM;
	469	if (i <= SKEL_ISO)
	470	;
	471	else if (i < SKEL_ASYNC)
	472	link = LINK_TO_QH(uhci->skel_async_qh);
	473	else if (!uhci->fsbr_is_on)
	474	;
17230acd AS	475	else
	476	link = LINK_TO_QH(uhci->skel_term_qh);
	477	check_qh_link:
	478	if (qh->link != link)
	479	out += sprintf(out, " last QH not linked to next skeleton!\n");
1da177e4 LT	480	}
1da177e4 LT	481
1da177e4 LT	482	return out - buf;
	483	}
	484
8d402e1a AS	485	#ifdef CONFIG_DEBUG_FS
8d402e1a AS	486
1da177e4 LT	487	#define MAX_OUTPUT (64 * 1024)
	488
	489	struct uhci_debug {
	490	int size;
	491	char *data;
1da177e4 LT	492	};
	493
	494	static int uhci_debug_open(struct inode inode, struct file file)
	495	{
8e18e294	496	struct uhci_hcd *uhci = inode->i_private;
1da177e4 LT	497	struct uhci_debug *up;
1da177e4 LT	498	int ret = -ENOMEM;
dccf4a48	499	unsigned long flags;
1da177e4 LT	500
	501	lock_kernel();
	502	up = kmalloc(sizeof(*up), GFP_KERNEL);
	503	if (!up)
	504	goto out;
	505
	506	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	507	if (!up->data) {
	508	kfree(up);
	509	goto out;
	510	}
	511
8d402e1a	512	up->size = 0;
dccf4a48	513	spin_lock_irqsave(&uhci->lock, flags);
8d402e1a AS	514	if (uhci->is_initialized)
8d402e1a AS	515	up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
dccf4a48	516	spin_unlock_irqrestore(&uhci->lock, flags);
1da177e4 LT	517
	518	file->private_data = up;
	519
	520	ret = 0;
	521	out:
	522	unlock_kernel();
	523	return ret;
	524	}
	525
	526	static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
	527	{
	528	struct uhci_debug *up;
	529	loff_t new = -1;
	530
	531	lock_kernel();
	532	up = file->private_data;
	533
	534	switch (whence) {
	535	case 0:
	536	new = off;
	537	break;
	538	case 1:
	539	new = file->f_pos + off;
	540	break;
	541	}
	542	if (new < 0 \|\| new > up->size) {
	543	unlock_kernel();
	544	return -EINVAL;
	545	}
	546	unlock_kernel();
	547	return (file->f_pos = new);
	548	}
	549
	550	static ssize_t uhci_debug_read(struct file file, char __user buf,
	551	size_t nbytes, loff_t *ppos)
	552	{
	553	struct uhci_debug *up = file->private_data;
	554	return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
	555	}
	556
	557	static int uhci_debug_release(struct inode inode, struct file file)
	558	{
	559	struct uhci_debug *up = file->private_data;
	560
	561	kfree(up->data);
	562	kfree(up);
	563
	564	return 0;
	565	}
	566
8d402e1a	567	#undef uhci_debug_operations
066202dd	568	static const struct file_operations uhci_debug_operations = {
8d402e1a	569	.owner = THIS_MODULE,
1da177e4 LT	570	.open = uhci_debug_open,
	571	.llseek = uhci_debug_lseek,
	572	.read = uhci_debug_read,
	573	.release = uhci_debug_release,
	574	};
	575
8d402e1a	576	#endif /* CONFIG_DEBUG_FS */
1da177e4	577
8d402e1a AS	578	#else /* DEBUG */
	579
	580	static inline void lprintk(char *buf)
	581	{}
	582
e009f1b2 AS	583	static inline int uhci_show_qh(struct uhci_hcd *uhci,
e009f1b2 AS	584	struct uhci_qh qh, char buf, int len, int space)
8d402e1a AS	585	{
	586	return 0;
	587	}
	588
	589	static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
	590	char *buf, int len)
	591	{
	592	return 0;
	593	}
1da177e4 LT	594
1da177e4 LT	595	#endif