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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 1999-2001 Johannes Erdfelt
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <asm/io.h>
#include "uhci.h"
/* Handle REALLY large printk's so we don't overflow buffers */
static void inline lprintk(char *buf)
{
char *p;
/* Just write one line at a time */
while (buf) {
p = strchr(buf, '\n');
if (p)
*p = 0;
printk("%s\n", buf);
buf = p;
if (buf)
buf++;
}
}
static int inline uhci_is_skeleton_td(struct uhci *uhci, struct uhci_td *td)
{
int i;
for (i = 0; i < UHCI_NUM_SKELTD; i++)
if (td == uhci->skeltd[i])
return 1;
return 0;
}
static int inline uhci_is_skeleton_qh(struct uhci *uhci, struct uhci_qh *qh)
{
int i;
for (i = 0; i < UHCI_NUM_SKELQH; i++)
if (qh == uhci->skelqh[i])
return 1;
return 0;
}
static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
{
char *out = buf;
char *spid;
/* Try to make sure there's enough memory */
if (len < 160)
return 0;
out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, td->link);
out += sprintf(out, "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;
}
out += sprintf(out, "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);
out += sprintf(out, "(buf=%08x)\n", td->buffer);
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 < 80)
return 0;
out += sprintf(out, " 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 " : "");
return out - buf;
}
static int uhci_show_status(struct uhci *uhci, char *buf, int len)
{
char *out = buf;
unsigned int 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_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
{
char *out = buf;
struct urb_priv *urbp;
struct list_head *head, *tmp;
struct uhci_td *td;
int i = 0, checked = 0, prevactive = 0;
/* 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, qh->link, qh->element);
if (qh->element & UHCI_PTR_QH)
out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
if (qh->element & UHCI_PTR_DEPTH)
out += sprintf(out, "%*s Depth traverse\n", space, "");
if (qh->element & 8)
out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
if (!(qh->element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
if (!qh->urbp) {
out += sprintf(out, "%*s urbp == NULL\n", space, "");
goto out;
}
urbp = qh->urbp;
head = &urbp->td_list;
tmp = head->next;
td = list_entry(tmp, struct uhci_td, list);
if (td->dma_handle != (qh->element & ~UHCI_PTR_BITS))
out += sprintf(out, "%*s Element != First TD\n", space, "");
while (tmp != head) {
struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
tmp = tmp->next;
out += sprintf(out, "%*s%d: ", space + 2, "", i++);
out += uhci_show_td(td, out, len - (out - buf), 0);
if (i > 10 && !checked && prevactive && tmp != head &&
debug <= 2) {
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) {
out += sprintf(out, "%*s[skipped %d active TD's]\n", space, "", ni - i);
tmp = ntmp;
td = ntd;
i = ni;
}
}
prevactive = td->status & TD_CTRL_ACTIVE;
}
if (list_empty(&urbp->queue_list) || urbp->queued)
goto out;
out += sprintf(out, "%*sQueued QH's:\n", -space, "--");
head = &urbp->queue_list;
tmp = head->next;
while (tmp != head) {
struct urb_priv *nurbp = list_entry(tmp, struct urb_priv,
queue_list);
tmp = tmp->next;
out += uhci_show_qh(nurbp->qh, out, len - (out - buf), space);
}
out:
return out - buf;
}
static const char *td_names[] = {"skel_int1_td", "skel_int2_td",
"skel_int4_td", "skel_int8_td",
"skel_int16_td", "skel_int32_td",
"skel_int64_td", "skel_int128_td",
"skel_int256_td", "skel_term_td" };
static const char *qh_names[] = { "skel_ls_control_qh", "skel_hs_control_qh",
"skel_bulk_qh", "skel_term_qh" };
#define show_frame_num() \
if (!shown) { \
shown = 1; \
out += sprintf(out, "- Frame %d\n", i); \
}
#define show_td_name() \
if (!shown) { \
shown = 1; \
out += sprintf(out, "- %s\n", td_names[i]); \
}
#define show_qh_name() \
if (!shown) { \
shown = 1; \
out += sprintf(out, "- %s\n", qh_names[i]); \
}
static int uhci_sprint_schedule(struct uhci *uhci, char *buf, int len)
{
char *out = buf;
int i;
struct uhci_qh *qh;
struct uhci_td *td;
struct list_head *tmp, *head;
out += sprintf(out, "HC status\n");
out += uhci_show_status(uhci, out, len - (out - buf));
out += sprintf(out, "Frame List\n");
for (i = 0; i < UHCI_NUMFRAMES; ++i) {
int shown = 0;
td = uhci->fl->frame_cpu[i];
if (!td)
continue;
if (td->dma_handle != (dma_addr_t)uhci->fl->frame[i]) {
show_frame_num();
out += sprintf(out, " frame list does not match td->dma_handle!\n");
}
if (uhci_is_skeleton_td(uhci, td))
continue;
show_frame_num();
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 TD's\n");
for (i = UHCI_NUM_SKELTD - 1; i >= 0; i--) {
int shown = 0;
td = uhci->skeltd[i];
if (debug > 1) {
show_td_name();
out += uhci_show_td(td, out, len - (out - buf), 4);
}
if (list_empty(&td->fl_list)) {
/* TD 0 is the int1 TD and links to control_ls_qh */
if (!i) {
if (td->link !=
(uhci->skel_ls_control_qh->dma_handle | UHCI_PTR_QH)) {
show_td_name();
out += sprintf(out, " skeleton TD not linked to ls_control QH!\n");
}
} else if (i < 9) {
if (td->link != uhci->skeltd[i - 1]->dma_handle) {
show_td_name();
out += sprintf(out, " skeleton TD not linked to next skeleton TD!\n");
}
} else {
show_td_name();
if (td->link != td->dma_handle)
out += sprintf(out, " skel_term_td does not link to self\n");
/* Don't show it twice */
if (debug <= 1)
out += uhci_show_td(td, out, len - (out - buf), 4);
}
continue;
}
show_td_name();
head = &td->fl_list;
tmp = head->next;
while (tmp != head) {
td = list_entry(tmp, struct uhci_td, fl_list);
tmp = tmp->next;
out += uhci_show_td(td, out, len - (out - buf), 4);
}
if (!i) {
if (td->link !=
(uhci->skel_ls_control_qh->dma_handle | UHCI_PTR_QH))
out += sprintf(out, " last TD not linked to ls_control QH!\n");
} else if (i < 9) {
if (td->link != uhci->skeltd[i - 1]->dma_handle)
out += sprintf(out, " last TD not linked to next skeleton!\n");
}
}
out += sprintf(out, "Skeleton QH's\n");
for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
int shown = 0;
qh = uhci->skelqh[i];
if (debug > 1) {
show_qh_name();
out += uhci_show_qh(qh, out, len - (out - buf), 4);
}
/* QH 3 is the Terminating QH, it's different */
if (i == 3) {
if (qh->link != UHCI_PTR_TERM) {
show_qh_name();
out += sprintf(out, " bandwidth reclamation on!\n");
}
if (qh->element != uhci->skel_term_td->dma_handle) {
show_qh_name();
out += sprintf(out, " skel_term_qh element is not set to skel_term_td\n");
}
}
if (list_empty(&qh->list)) {
if (i < 3) {
if (qh->link !=
(uhci->skelqh[i + 1]->dma_handle | UHCI_PTR_QH)) {
show_qh_name();
out += sprintf(out, " skeleton QH not linked to next skeleton QH!\n");
}
}
continue;
}
show_qh_name();
head = &qh->list;
tmp = head->next;
while (tmp != head) {
qh = list_entry(tmp, struct uhci_qh, list);
tmp = tmp->next;
out += uhci_show_qh(qh, out, len - (out - buf), 4);
}
if (i < 3) {
if (qh->link !=
(uhci->skelqh[i + 1]->dma_handle | UHCI_PTR_QH))
out += sprintf(out, " last QH not linked to next skeleton!\n");
}
}
return out - buf;
}
#ifdef CONFIG_PROC_FS
#define MAX_OUTPUT (PAGE_SIZE * 8)
static struct proc_dir_entry *uhci_proc_root = NULL;
struct uhci_proc {
int size;
char *data;
struct uhci *uhci;
};
static int uhci_proc_open(struct inode *inode, struct file *file)
{
const struct proc_dir_entry *dp = inode->u.generic_ip;
struct uhci *uhci = dp->data;
struct uhci_proc *up;
unsigned long flags;
int ret = -ENOMEM;
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;
}
spin_lock_irqsave(&uhci->frame_list_lock, flags);
up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
file->private_data = up;
ret = 0;
out:
unlock_kernel();
return ret;
}
static loff_t uhci_proc_lseek(struct file *file, loff_t off, int whence)
{
struct uhci_proc *up = file->private_data;
loff_t new;
switch (whence) {
case 0:
new = off;
break;
case 1:
new = file->f_pos + off;
break;
case 2:
default:
return -EINVAL;
}
if (new < 0 || new > up->size)
return -EINVAL;
return (file->f_pos = new);
}
static ssize_t uhci_proc_read(struct file *file, char *buf, size_t nbytes,
loff_t *ppos)
{
struct uhci_proc *up = file->private_data;
unsigned int pos;
unsigned int size;
pos = *ppos;
size = up->size;
if (pos >= size)
return 0;
if (nbytes >= size)
nbytes = size;
if (pos + nbytes > size)
nbytes = size - pos;
if (!access_ok(VERIFY_WRITE, buf, nbytes))
return -EINVAL;
copy_to_user(buf, up->data + pos, nbytes);
*ppos += nbytes;
return nbytes;
}
static int uhci_proc_release(struct inode *inode, struct file *file)
{
struct uhci_proc *up = file->private_data;
kfree(up->data);
kfree(up);
return 0;
}
static struct file_operations uhci_proc_operations = {
open: uhci_proc_open,
llseek: uhci_proc_lseek,
read: uhci_proc_read,
// write: uhci_proc_write,
release: uhci_proc_release,
};
#endif
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