[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 frame %x desc [%p]\n",
				space, "", qh->period, qh->iso_frame,
				qh->iso_packet_desc);

	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 (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
			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->udev) {
		out += sprintf(out, "%*s  Dummy TD\n", space, "");
		out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
	}

	return out - buf;
}

static const char * const qh_names[] = {
  "skel_unlink_qh", "skel_iso_qh",
  "skel_int128_qh", "skel_int64_qh",
  "skel_int32_qh", "skel_int16_qh",
  "skel_int8_qh", "skel_int4_qh",
  "skel_int2_qh", "skel_int1_qh",
  "skel_ls_control_qh", "skel_fs_control_qh",
  "skel_bulk_qh", "skel_term_qh"
};

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;

	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));
	if (debug <= 1)
		return out - buf;

	out += sprintf(out, "Frame List\n");
	nframes = 10;
	nerrs = 0;
	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
		__le32 link, 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 (cpu_to_le32(td->dma_handle) != link) {
				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;

		qh = uhci->skelqh[i];
		out += sprintf(out, "- %s\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 == UHCI_NUM_SKELQH - 1) {
			if (qh->link != UHCI_PTR_TERM)
				out += sprintf(out, "    bandwidth reclamation on!\n");

			if (qh_element(qh) != cpu_to_le32(uhci->term_td->dma_handle))
				out += sprintf(out, "    skel_term_qh element is not set to term_td!\n");

			continue;
		}

		j = (i < 9) ? 9 : i+1;		/* Next skeleton */
		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 ((cnt -= 10) > 0)
			out += sprintf(out, "    Skipped %d QHs\n", cnt);

		if (i > 1 && i < UHCI_NUM_SKELQH - 1) {
			if (qh->link !=
			    (cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH))
				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)
c8155cc5 AS	171	out += sprintf(out, "%*s period %d frame %x desc [%p]\n",
	172	space, "", qh->period, qh->iso_frame,
	173	qh->iso_packet_desc);
1da177e4 LT	174
	175	if (element & UHCI_PTR_QH)
	176	out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
	177
	178	if (element & UHCI_PTR_DEPTH)
	179	out += sprintf(out, "%*s Depth traverse\n", space, "");
	180
	181	if (element & cpu_to_le32(8))
	182	out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
	183
	184	if (!(element & ~(UHCI_PTR_QH \| UHCI_PTR_DEPTH)))
	185	out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
	186
dccf4a48 AS	187	if (list_empty(&qh->queue)) {
	188	out += sprintf(out, "%*s queue is empty\n", space, "");
	189	} else {
	190	struct urb_priv *urbp = list_entry(qh->queue.next,
	191	struct urb_priv, node);
	192	struct uhci_td *td = list_entry(urbp->td_list.next,
	193	struct uhci_td, list);
	194
	195	if (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
	196	out += sprintf(out, "%*s Element != First TD\n",
	197	space, "");
	198	i = nurbs = 0;
	199	list_for_each_entry(urbp, &qh->queue, node) {
	200	if (++i <= 10)
	201	out += uhci_show_urbp(urbp, out,
	202	len - (out - buf), space + 2);
	203	else
	204	++nurbs;
1da177e4	205	}
dccf4a48 AS	206	if (nurbs > 0)
	207	out += sprintf(out, "%*s Skipped %d URBs\n",
	208	space, "", nurbs);
1da177e4 LT	209	}
1da177e4 LT	210
af0bb599 AS	211	if (qh->udev) {
	212	out += sprintf(out, "%*s Dummy TD\n", space, "");
	213	out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
	214	}
	215
1da177e4 LT	216	return out - buf;
	217	}
	218
4c4c9432	219	static const char * const qh_names[] = {
dccf4a48	220	"skel_unlink_qh", "skel_iso_qh",
1da177e4 LT	221	"skel_int128_qh", "skel_int64_qh",
	222	"skel_int32_qh", "skel_int16_qh",
	223	"skel_int8_qh", "skel_int4_qh",
	224	"skel_int2_qh", "skel_int1_qh",
	225	"skel_ls_control_qh", "skel_fs_control_qh",
	226	"skel_bulk_qh", "skel_term_qh"
	227	};
	228
1da177e4 LT	229	static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
	230	{
	231	char *out = buf;
	232
	233	/* Try to make sure there's enough memory */
	234	if (len < 160)
	235	return 0;
	236
	237	out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
	238	port,
	239	status,
	240	(status & USBPORTSC_SUSP) ? " Suspend" : "",
	241	(status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
	242	(status & USBPORTSC_OC) ? " OverCurrent" : "",
	243	(status & USBPORTSC_PR) ? " Reset" : "",
	244	(status & USBPORTSC_LSDA) ? " LowSpeed" : "",
	245	(status & USBPORTSC_RD) ? " ResumeDetect" : "",
	246	(status & USBPORTSC_PEC) ? " EnableChange" : "",
	247	(status & USBPORTSC_PE) ? " Enabled" : "",
	248	(status & USBPORTSC_CSC) ? " ConnectChange" : "",
	249	(status & USBPORTSC_CCS) ? " Connected" : "");
	250
	251	return out - buf;
	252	}
	253
c8f4fe43 AS	254	static int uhci_show_root_hub_state(struct uhci_hcd uhci, char buf, int len)
	255	{
	256	char *out = buf;
	257	char *rh_state;
	258
	259	/* Try to make sure there's enough memory */
	260	if (len < 60)
	261	return 0;
	262
	263	switch (uhci->rh_state) {
	264	case UHCI_RH_RESET:
	265	rh_state = "reset"; break;
	266	case UHCI_RH_SUSPENDED:
	267	rh_state = "suspended"; break;
	268	case UHCI_RH_AUTO_STOPPED:
	269	rh_state = "auto-stopped"; break;
	270	case UHCI_RH_RESUMING:
	271	rh_state = "resuming"; break;
	272	case UHCI_RH_SUSPENDING:
	273	rh_state = "suspending"; break;
	274	case UHCI_RH_RUNNING:
	275	rh_state = "running"; break;
	276	case UHCI_RH_RUNNING_NODEVS:
	277	rh_state = "running, no devs"; break;
	278	default:
	279	rh_state = "?"; break;
	280	}
84afddd7 AS	281	out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
84afddd7 AS	282	rh_state, uhci->fsbr_is_on);
c8f4fe43 AS	283	return out - buf;
	284	}
	285
1da177e4 LT	286	static int uhci_show_status(struct uhci_hcd uhci, char buf, int len)
	287	{
	288	char *out = buf;
	289	unsigned long io_addr = uhci->io_addr;
	290	unsigned short usbcmd, usbstat, usbint, usbfrnum;
	291	unsigned int flbaseadd;
	292	unsigned char sof;
	293	unsigned short portsc1, portsc2;
	294
	295	/* Try to make sure there's enough memory */
c4334726	296	if (len < 80 * 9)
1da177e4 LT	297	return 0;
	298
	299	usbcmd = inw(io_addr + 0);
	300	usbstat = inw(io_addr + 2);
	301	usbint = inw(io_addr + 4);
	302	usbfrnum = inw(io_addr + 6);
	303	flbaseadd = inl(io_addr + 8);
	304	sof = inb(io_addr + 12);
	305	portsc1 = inw(io_addr + 16);
	306	portsc2 = inw(io_addr + 18);
	307
	308	out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
	309	usbcmd,
	310	(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
	311	(usbcmd & USBCMD_CF) ? "CF " : "",
	312	(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
	313	(usbcmd & USBCMD_FGR) ? "FGR " : "",
	314	(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
	315	(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
	316	(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
	317	(usbcmd & USBCMD_RS) ? "RS " : "");
	318
	319	out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
	320	usbstat,
	321	(usbstat & USBSTS_HCH) ? "HCHalted " : "",
	322	(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
	323	(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
	324	(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
	325	(usbstat & USBSTS_ERROR) ? "USBError " : "",
	326	(usbstat & USBSTS_USBINT) ? "USBINT " : "");
	327
	328	out += sprintf(out, " usbint = %04x\n", usbint);
	329	out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
	330	0xfff & (4*(unsigned int)usbfrnum));
	331	out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
	332	out += sprintf(out, " sof = %02x\n", sof);
	333	out += uhci_show_sc(1, portsc1, out, len - (out - buf));
	334	out += uhci_show_sc(2, portsc2, out, len - (out - buf));
c8155cc5 AS	335	out += sprintf(out, "Most recent frame: %x (%d) "
	336	"Last ISO frame: %x (%d)\n",
	337	uhci->frame_number, uhci->frame_number & 1023,
	338	uhci->last_iso_frame, uhci->last_iso_frame & 1023);
1da177e4 LT	339
	340	return out - buf;
	341	}
	342
1da177e4 LT	343	static int uhci_sprint_schedule(struct uhci_hcd uhci, char buf, int len)
1da177e4 LT	344	{
1da177e4 LT	345	char *out = buf;
	346	int i, j;
	347	struct uhci_qh *qh;
	348	struct uhci_td *td;
	349	struct list_head tmp, head;
f3fe239b	350	int nframes, nerrs;
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));
dccf4a48 AS	355	if (debug <= 1)
dccf4a48 AS	356	return out - buf;
1da177e4 LT	357
1da177e4 LT	358	out += sprintf(out, "Frame List\n");
f3fe239b AS	359	nframes = 10;
f3fe239b AS	360	nerrs = 0;
1da177e4	361	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
f3fe239b AS	362	__le32 link, qh_dma;
	363
	364	j = 0;
a1d59ce8	365	td = uhci->frame_cpu[i];
f3fe239b	366	link = uhci->frame[i];
1da177e4	367	if (!td)
f3fe239b	368	goto check_link;
1da177e4	369
f3fe239b AS	370	if (nframes > 0) {
	371	out += sprintf(out, "- Frame %d -> (%08x)\n",
	372	i, le32_to_cpu(link));
	373	j = 1;
	374	}
1da177e4 LT	375
	376	head = &td->fl_list;
	377	tmp = head;
	378	do {
	379	td = list_entry(tmp, struct uhci_td, fl_list);
	380	tmp = tmp->next;
f3fe239b AS	381	if (cpu_to_le32(td->dma_handle) != link) {
	382	if (nframes > 0)
	383	out += sprintf(out, " link does "
	384	"not match list entry!\n");
	385	else
	386	++nerrs;
	387	}
	388	if (nframes > 0)
	389	out += uhci_show_td(td, out,
	390	len - (out - buf), 4);
	391	link = td->link;
1da177e4	392	} while (tmp != head);
f3fe239b AS	393
	394	check_link:
	395	qh_dma = uhci_frame_skel_link(uhci, i);
	396	if (link != qh_dma) {
	397	if (nframes > 0) {
	398	if (!j) {
	399	out += sprintf(out,
	400	"- Frame %d -> (%08x)\n",
	401	i, le32_to_cpu(link));
	402	j = 1;
	403	}
	404	out += sprintf(out, " link does not match "
	405	"QH (%08x)!\n", le32_to_cpu(qh_dma));
	406	} else
	407	++nerrs;
	408	}
	409	nframes -= j;
1da177e4	410	}
f3fe239b AS	411	if (nerrs > 0)
f3fe239b AS	412	out += sprintf(out, "Skipped %d bad links\n", nerrs);
1da177e4	413
687f5f34	414	out += sprintf(out, "Skeleton QHs\n");
1da177e4 LT	415
1da177e4 LT	416	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
dccf4a48	417	int cnt = 0;
1da177e4 LT	418
1da177e4 LT	419	qh = uhci->skelqh[i];
dccf4a48 AS	420	out += sprintf(out, "- %s\n", qh_names[i]); \
dccf4a48 AS	421	out += uhci_show_qh(qh, out, len - (out - buf), 4);
1da177e4 LT	422
	423	/* Last QH is the Terminating QH, it's different */
	424	if (i == UHCI_NUM_SKELQH - 1) {
	425	if (qh->link != UHCI_PTR_TERM)
	426	out += sprintf(out, " bandwidth reclamation on!\n");
	427
	428	if (qh_element(qh) != cpu_to_le32(uhci->term_td->dma_handle))
	429	out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
	430
	431	continue;
	432	}
	433
dccf4a48 AS	434	j = (i < 9) ? 9 : i+1; /* Next skeleton */
dccf4a48 AS	435	head = &qh->node;
1da177e4 LT	436	tmp = head->next;
	437
	438	while (tmp != head) {
dccf4a48	439	qh = list_entry(tmp, struct uhci_qh, node);
1da177e4	440	tmp = tmp->next;
dccf4a48 AS	441	if (++cnt <= 10)
	442	out += uhci_show_qh(qh, out,
	443	len - (out - buf), 4);
1da177e4	444	}
dccf4a48 AS	445	if ((cnt -= 10) > 0)
dccf4a48 AS	446	out += sprintf(out, " Skipped %d QHs\n", cnt);
1da177e4	447
dccf4a48	448	if (i > 1 && i < UHCI_NUM_SKELQH - 1) {
1da177e4 LT	449	if (qh->link !=
	450	(cpu_to_le32(uhci->skelqh[j]->dma_handle) \| UHCI_PTR_QH))
	451	out += sprintf(out, " last QH not linked to next skeleton!\n");
	452	}
	453	}
	454
1da177e4 LT	455	return out - buf;
	456	}
	457
8d402e1a AS	458	#ifdef CONFIG_DEBUG_FS
8d402e1a AS	459
1da177e4 LT	460	#define MAX_OUTPUT (64 * 1024)
	461
	462	struct uhci_debug {
	463	int size;
	464	char *data;
1da177e4 LT	465	};
	466
	467	static int uhci_debug_open(struct inode inode, struct file file)
	468	{
8e18e294	469	struct uhci_hcd *uhci = inode->i_private;
1da177e4 LT	470	struct uhci_debug *up;
1da177e4 LT	471	int ret = -ENOMEM;
dccf4a48	472	unsigned long flags;
1da177e4 LT	473
	474	lock_kernel();
	475	up = kmalloc(sizeof(*up), GFP_KERNEL);
	476	if (!up)
	477	goto out;
	478
	479	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
	480	if (!up->data) {
	481	kfree(up);
	482	goto out;
	483	}
	484
8d402e1a	485	up->size = 0;
dccf4a48	486	spin_lock_irqsave(&uhci->lock, flags);
8d402e1a AS	487	if (uhci->is_initialized)
8d402e1a AS	488	up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
dccf4a48	489	spin_unlock_irqrestore(&uhci->lock, flags);
1da177e4 LT	490
	491	file->private_data = up;
	492
	493	ret = 0;
	494	out:
	495	unlock_kernel();
	496	return ret;
	497	}
	498
	499	static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
	500	{
	501	struct uhci_debug *up;
	502	loff_t new = -1;
	503
	504	lock_kernel();
	505	up = file->private_data;
	506
	507	switch (whence) {
	508	case 0:
	509	new = off;
	510	break;
	511	case 1:
	512	new = file->f_pos + off;
	513	break;
	514	}
	515	if (new < 0 \|\| new > up->size) {
	516	unlock_kernel();
	517	return -EINVAL;
	518	}
	519	unlock_kernel();
	520	return (file->f_pos = new);
	521	}
	522
	523	static ssize_t uhci_debug_read(struct file file, char __user buf,
	524	size_t nbytes, loff_t *ppos)
	525	{
	526	struct uhci_debug *up = file->private_data;
	527	return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
	528	}
	529
	530	static int uhci_debug_release(struct inode inode, struct file file)
	531	{
	532	struct uhci_debug *up = file->private_data;
	533
	534	kfree(up->data);
	535	kfree(up);
	536
	537	return 0;
	538	}
	539
8d402e1a	540	#undef uhci_debug_operations
066202dd	541	static const struct file_operations uhci_debug_operations = {
8d402e1a	542	.owner = THIS_MODULE,
1da177e4 LT	543	.open = uhci_debug_open,
	544	.llseek = uhci_debug_lseek,
	545	.read = uhci_debug_read,
	546	.release = uhci_debug_release,
	547	};
	548
8d402e1a	549	#endif /* CONFIG_DEBUG_FS */
1da177e4	550
8d402e1a AS	551	#else /* DEBUG */
	552
	553	static inline void lprintk(char *buf)
	554	{}
	555
	556	static inline int uhci_show_qh(struct uhci_qh qh, char buf,
	557	int len, int space)
	558	{
	559	return 0;
	560	}
	561
	562	static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
	563	char *buf, int len)
	564	{
	565	return 0;
	566	}
1da177e4 LT	567
1da177e4 LT	568	#endif