patch-2.2.18 linux/drivers/usb/uhci-debug.h

• Lines: 317
• Date: Sat Dec 9 21:32:59 2000
• Orig file: v2.2.17/drivers/usb/uhci-debug.h
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/uhci-debug.h linux/drivers/usb/uhci-debug.h
@@ -0,0 +1,316 @@
+/*
+ * 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 Johannes Erdfelt
+ */
+
+#include <linux/kernel.h>
+#include <asm/io.h>
+
+#include "uhci.h"
+
+void uhci_show_td(struct uhci_td *td)
+{
+	char *spid;
+
+	printk("%08x ", td->link);
+	printk("e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
+		((td->status >> 27) & 3),
+		(td->status & TD_CTRL_SPD) ?      "SPD " : "",
+		(td->status & TD_CTRL_LS) ?       "LS " : "",
+		(td->status & TD_CTRL_IOC) ?      "IOC " : "",
+		(td->status & TD_CTRL_ACTIVE) ?   "Active " : "",
+		(td->status & TD_CTRL_STALLED) ?  "Stalled " : "",
+		(td->status & TD_CTRL_DBUFERR) ?  "DataBufErr " : "",
+		(td->status & TD_CTRL_BABBLE) ?   "Babble " : "",
+		(td->status & TD_CTRL_NAK) ?      "NAK " : "",
+		(td->status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
+		(td->status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
+		td->status & 0x7ff);
+
+	switch (td->info & 0xff) {
+		case USB_PID_SETUP:
+			spid = "SETUP";
+			break;
+		case USB_PID_OUT:
+			spid = "OUT";
+			break;
+		case USB_PID_IN:
+			spid = "IN";
+			break;
+		default:
+			spid = "?";
+			break;
+	}
+
+	printk("MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
+		td->info >> 21,
+		((td->info >> 19) & 1),
+		(td->info >> 15) & 15,
+		(td->info >> 8) & 127,
+		(td->info & 0xff),
+		spid);
+	printk("(buf=%08x)\n", td->buffer);
+}
+
+static void uhci_show_sc(int port, unsigned short status)
+{
+	printk("  stat%d     =     %04x   %s%s%s%s%s%s%s%s\n",
+		port,
+		status,
+		(status & USBPORTSC_SUSP) ? "PortSuspend " : "",
+		(status & USBPORTSC_PR) ?   "PortReset " : "",
+		(status & USBPORTSC_LSDA) ? "LowSpeed " : "",
+		(status & USBPORTSC_RD) ?   "ResumeDetect " : "",
+		(status & USBPORTSC_PEC) ?  "EnableChange " : "",
+		(status & USBPORTSC_PE) ?   "PortEnabled " : "",
+		(status & USBPORTSC_CSC) ?  "ConnectChange " : "",
+		(status & USBPORTSC_CCS) ?  "PortConnected " : "");
+}
+
+void uhci_show_status(struct uhci *uhci)
+{
+	unsigned int io_addr = uhci->io_addr;
+	unsigned short usbcmd, usbstat, usbint, usbfrnum;
+	unsigned int flbaseadd;
+	unsigned char sof;
+	unsigned short portsc1, portsc2;
+
+	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);
+
+	printk("  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 " : "");
+
+	printk("  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 " : "");
+
+	printk("  usbint    =     %04x\n", usbint);
+	printk("  usbfrnum  =   (%d)%03x\n", (usbfrnum >> 10) & 1,
+		0xfff & (4*(unsigned int)usbfrnum));
+	printk("  flbaseadd = %08x\n", flbaseadd);
+	printk("  sof       =       %02x\n", sof);
+	uhci_show_sc(1, portsc1);
+	uhci_show_sc(2, portsc2);
+}
+
+#define uhci_link_to_qh(x) ((struct uhci_qh *) uhci_link_to_td(x))
+
+struct uhci_td *uhci_link_to_td(unsigned int link)
+{
+	if (link & UHCI_PTR_TERM)
+		return NULL;
+
+	return bus_to_virt(link & ~UHCI_PTR_BITS);
+}
+
+void uhci_show_urb_queue(struct urb *urb)
+{
+	struct urb_priv *urbp = urb->hcpriv;
+	struct list_head *head, *tmp;
+	int i, checked = 0, prevactive = 0;
+
+	printk("  URB [%p] urbp [%p]\n", urb, urbp);
+
+	if (urbp->qh)
+		printk("    QH [%p]\n", urbp->qh);
+	else
+		printk("    QH [%p] element (%08x) link (%08x)\n", urbp->qh,
+			urbp->qh->element, urbp->qh->link);
+
+	i = 0;
+
+	head = &urbp->list;
+	tmp = head->next;
+	while (tmp != head) {
+		struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+		tmp = tmp->next;
+
+		printk("      td %d: [%p]\n", i++, td);
+		printk("      ");
+		uhci_show_td(td);
+
+		if (i > 10 && !checked && prevactive && tmp != head) {
+			struct list_head *ntmp = tmp;
+			struct uhci_td *ntd = td;
+			int active = 1, ni = i;
+
+			checked = 1;
+
+			while (ntmp != head && ntmp->next != head && active) {
+				ntd = list_entry(ntmp, struct uhci_td, list);
+
+				ntmp = ntmp->next;
+
+				active = ntd->status & TD_CTRL_ACTIVE;
+
+				ni++;
+			}
+
+			if (active && ni > i) {
+				printk("      [skipped %d active TD's]\n", ni - i);
+				tmp = ntmp;
+				td = ntd;
+				i = ni;
+			}
+		}
+
+		prevactive = td->status & TD_CTRL_ACTIVE;
+	}
+}
+
+void uhci_show_queue(struct uhci_qh *qh)
+{
+	struct uhci_td *td, *first;
+	int i = 0, count = 1000;
+
+	if (qh->element & UHCI_PTR_QH)
+		printk("      Element points to QH (bug?)\n");
+
+	if (qh->element & UHCI_PTR_DEPTH)
+		printk("      Depth traverse\n");
+
+	if (qh->element & UHCI_PTR_TERM)
+		printk("      Terminate\n");
+
+	if (!(qh->element & ~UHCI_PTR_BITS)) {
+		printk("      td 0: [NULL]\n");
+		return;
+	}
+
+	first = uhci_link_to_td(qh->element);
+
+	/* Make sure it doesn't runaway */
+	for (td = first; td && count > 0; 
+	     td = uhci_link_to_td(td->link), --count) {
+		printk("      td %d: [%p]\n", i++, td);
+		printk("      ");
+		uhci_show_td(td);
+
+		if (td == uhci_link_to_td(td->link)) {
+			printk(KERN_ERR "td links to itself!\n");
+			break;
+		}
+	}
+}
+
+static int uhci_is_skeleton_td(struct uhci *uhci, struct uhci_td *td)
+{
+	int j;
+
+	for (j = 0; j < UHCI_NUM_SKELTD; j++)
+		if (td == uhci->skeltd + j)
+			return 1;
+
+	return 0;
+}
+
+static int uhci_is_skeleton_qh(struct uhci *uhci, struct uhci_qh *qh)
+{
+	int j;
+
+	for (j = 0; j < UHCI_NUM_SKELQH; j++)
+		if (qh == uhci->skelqh + j)
+			return 1;
+
+	return 0;
+}
+
+static const char *td_names[] = {"interrupt1", "interrupt2", "interrupt4",
+				 "interrupt8", "interrupt16", "interrupt32",
+				 "interrupt64", "interrupt128", "interrupt256" };
+static const char *qh_names[] = { "control", "bulk" };
+
+void uhci_show_queues(struct uhci *uhci)
+{
+	int i, isqh = 0;
+	struct uhci_qh *qh;
+	struct uhci_td *td;
+
+	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
+		int shown = 0;
+
+		td = uhci_link_to_td(uhci->fl->frame[i]);
+		if (td)
+			isqh = uhci->fl->frame[i] & UHCI_PTR_QH;
+		while (td && !isqh) {
+			if (uhci_is_skeleton_td(uhci, td))
+				break;
+
+			if (!shown) {
+				printk("   Frame %d\n", i);
+				shown = 1;
+			}
+
+			printk("[%p] ", td);
+
+			uhci_show_td(td);
+			td = uhci_link_to_td(td->link);
+			if (td)
+				isqh = td->link & UHCI_PTR_QH;
+		}
+	}
+	for (i = 0; i < UHCI_NUM_SKELTD; ++i) {
+		printk("  %s: [%p] (%08x)\n", td_names[i],
+			&uhci->skeltd[i],
+			uhci->skeltd[i].link);
+
+		td = uhci_link_to_td(uhci->skeltd[i].link);
+		if (td)
+			isqh = uhci->skeltd[i].link & UHCI_PTR_QH;
+		while (td && !isqh) {
+			if (uhci_is_skeleton_td(uhci, td))
+				break;
+
+			printk("[%p] ", td);
+
+			uhci_show_td(td);
+			td = uhci_link_to_td(td->link);
+			if (td)
+				isqh = td->link & UHCI_PTR_QH;
+		}
+	}
+	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
+		printk("  %s: [%p] (%08x) (%08x)\n", qh_names[i],
+			&uhci->skelqh[i],
+			uhci->skelqh[i].link, uhci->skelqh[i].element);
+
+		qh = uhci_link_to_qh(uhci->skelqh[i].link);
+		for (; qh; qh = uhci_link_to_qh(qh->link)) {
+			if (uhci_is_skeleton_qh(uhci, qh))
+				break;
+
+			printk("    [%p] (%08x) (%08x)\n",
+				qh, qh->link, qh->element);
+
+			uhci_show_queue(qh);
+		}
+	}
+}
+