/*
* 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/config.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 (* (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;
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: out += sprintf(out, "ISO"); break;
case PIPE_INTERRUPT: out += sprintf(out, "INT"); break;
case PIPE_BULK: out += sprintf(out, "BLK"); break;
case PIPE_CONTROL: out += sprintf(out, "CTL"); break;
}
out += sprintf(out, "%s", (urbp->fsbr ? " FSBR" : ""));
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 (++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);
/* Try to make sure there's enough memory */
if (len < 80 * 6)
return 0;
out += sprintf(out, "%*s[%p] link (%08x) element (%08x)\n", space, "",
qh, le32_to_cpu(qh->link), le32_to_cpu(element));
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\n", rh_state);
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 * 6)
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));
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;
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");
for (i = 0; i < UHCI_NUMFRAMES; ++i) {
td = uhci->frame_cpu[i];
if (!td)
continue;
out += sprintf(out, "- Frame %d\n", i); \
if (td->dma_handle != (dma_addr_t)uhci->frame[i])
out += sprintf(out, " frame list does not match td->dma_handle!\n");
head = &td->fl_list;
tmp = head;
do {
td = list_entry(tmp, struct uhci_td, fl_list);
tmp = tmp->next;
out += uhci_show_td(td, out, len - (out - buf), 4);
} while (tmp != head);
}
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->u.generic_ip;
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 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
