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/*
* 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);
}
}
}
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