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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 <linuxcomp.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/smp_lock.h>
#include <asm/io.h>
#include "uhci-hcd.h"
/* Handle REALLY large printk's so we don't overflow buffers */
static inline void 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 inline int uhci_is_skeleton_qh
(struct uhci_hcd
*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
;
u32 status
, token
;
/* Try to make sure there's enough memory */
if (len
< 160)
return 0;
status
= td_status
(td
);
out
+= sprintf26
(out
, "%*s[%p] link (%08x) ", space
, "", td
, le32_to_cpu
(td
->link
));
out
+= sprintf26
(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
+= sprintf26
(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
+= sprintf26
(out
, "(buf=%08x)\n", le32_to_cpu
(td
->buffer
));
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
+= sprintf26
(out
, "%*s[%p] link (%08x) element (%08x)\n", space
, "",
qh
, le32_to_cpu
(qh
->link
), le32_to_cpu
(qh
->element
));
if (qh
->element
& UHCI_PTR_QH
)
out
+= sprintf26
(out
, "%*s Element points to QH (bug?)\n", space
, "");
if (qh
->element
& UHCI_PTR_DEPTH
)
out
+= sprintf26
(out
, "%*s Depth traverse\n", space
, "");
if (qh
->element
& cpu_to_le32
(8))
out
+= sprintf26
(out
, "%*s Bit 3 set (bug?)\n", space
, "");
if (!(qh
->element
& ~
(UHCI_PTR_QH
| UHCI_PTR_DEPTH
)))
out
+= sprintf26
(out
, "%*s Element is NULL (bug?)\n", space
, "");
if (!qh
->urbp
) {
out
+= sprintf26
(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 (cpu_to_le32
(td
->dma_handle
) != (qh
->element
& ~UHCI_PTR_BITS
))
out
+= sprintf26
(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
+= sprintf26
(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
= td_status
(ntd
) & TD_CTRL_ACTIVE
;
ni
++;
}
if (active
&& ni
> i
) {
out
+= sprintf26
(out
, "%*s[skipped %d active TD's]\n", space
, "", ni
- i
);
tmp
= ntmp
;
td
= ntd
;
i
= ni
;
}
}
prevactive
= td_status
(td
) & TD_CTRL_ACTIVE
;
}
if (list_empty
(&urbp
->queue_list
) || urbp
->queued
)
goto out
;
out
+= sprintf26
(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
;
}
#define show_frame_num() \
if (!shown) { \
shown = 1; \
out += sprintf26(out, "- Frame %d\n", i); \
}
#ifdef CONFIG_PROC_FS
static const char *qh_names
[] = {
"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_hs_control_qh",
"skel_bulk_qh", "skel_term_qh"
};
#define show_qh_name() \
if (!shown) { \
shown = 1; \
out += sprintf26(out, "- %s\n", qh_names[i]); \
}
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
+= sprintf26
(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_hcd
*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
+= sprintf26
(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
+= sprintf26
(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
+= sprintf26
(out
, " usbint = %04x\n", usbint
);
out
+= sprintf26
(out
, " usbfrnum = (%d)%03x\n", (usbfrnum
>> 10) & 1,
0xfff & (4*(unsigned int)usbfrnum
));
out
+= sprintf26
(out
, " flbaseadd = %08x\n", flbaseadd
);
out
+= sprintf26
(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_urbp
(struct uhci_hcd
*uhci
, struct urb_priv
*urbp
, char *buf
, int len
)
{
struct list_head
*tmp
;
char *out
= buf
;
int count
= 0;
if (len
< 200)
return 0;
out
+= sprintf26
(out
, "urb_priv [%p] ", urbp
);
out
+= sprintf26
(out
, "urb [%p] ", urbp
->urb
);
out
+= sprintf26
(out
, "qh [%p] ", urbp
->qh
);
out
+= sprintf26
(out
, "Dev=%d ", usb_pipedevice
(urbp
->urb
->pipe
));
out
+= sprintf26
(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
+= sprintf26
(out
, "ISO "); break;
case PIPE_INTERRUPT
: out
+= sprintf26
(out
, "INT "); break;
case PIPE_BULK
: out
+= sprintf26
(out
, "BLK "); break;
case PIPE_CONTROL
: out
+= sprintf26
(out
, "CTL "); break;
}
out
+= sprintf26
(out
, "%s", (urbp
->fsbr
? "FSBR " : ""));
out
+= sprintf26
(out
, "%s", (urbp
->fsbr_timeout
? "FSBR_TO " : ""));
if (urbp
->status
!= -EINPROGRESS
)
out
+= sprintf26
(out
, "Status=%d ", urbp
->status
);
//out += sprintf26(out, "Inserttime=%lx ",urbp->inserttime);
//out += sprintf26(out, "FSBRtime=%lx ",urbp->fsbrtime);
spin_lock
(&urbp
->urb
->lock
);
count
= 0;
list_for_each
(tmp
, &urbp
->td_list
)
count
++;
spin_unlock
(&urbp
->urb
->lock
);
out
+= sprintf26
(out
, "TDs=%d ",count
);
if (urbp
->queued
)
out
+= sprintf26
(out
, "queued\n");
else {
spin_lock
(&uhci
->frame_list_lock
);
count
= 0;
list_for_each
(tmp
, &urbp
->queue_list
)
count
++;
spin_unlock
(&uhci
->frame_list_lock
);
out
+= sprintf26
(out
, "queued URBs=%d\n", count
);
}
return out
- buf
;
}
static int uhci_show_lists
(struct uhci_hcd
*uhci
, char *buf
, int len
)
{
char *out
= buf
;
unsigned long flags
;
struct list_head
*head
, *tmp
;
int count
;
out
+= sprintf26
(out
, "Main list URBs:");
spin_lock_irqsave
(&uhci
->urb_list_lock
, flags
);
if (list_empty
(&uhci
->urb_list
))
out
+= sprintf26
(out
, " Empty\n");
else {
out
+= sprintf26
(out
, "\n");
count
= 0;
head
= &uhci
->urb_list
;
tmp
= head
->next
;
while (tmp
!= head
) {
struct urb_priv
*urbp
= list_entry
(tmp
, struct urb_priv
, urb_list
);
out
+= sprintf26
(out
, " %d: ", ++count
);
out
+= uhci_show_urbp
(uhci
, urbp
, out
, len
- (out
- buf
));
tmp
= tmp
->next
;
}
}
spin_unlock_irqrestore
(&uhci
->urb_list_lock
, flags
);
out
+= sprintf26
(out
, "Remove list URBs:");
spin_lock_irqsave
(&uhci
->urb_remove_list_lock
, flags
);
if (list_empty
(&uhci
->urb_remove_list
))
out
+= sprintf26
(out
, " Empty\n");
else {
out
+= sprintf26
(out
, "\n");
count
= 0;
head
= &uhci
->urb_remove_list
;
tmp
= head
->next
;
while (tmp
!= head
) {
struct urb_priv
*urbp
= list_entry
(tmp
, struct urb_priv
, urb_list
);
out
+= sprintf26
(out
, " %d: ", ++count
);
out
+= uhci_show_urbp
(uhci
, urbp
, out
, len
- (out
- buf
));
tmp
= tmp
->next
;
}
}
spin_unlock_irqrestore
(&uhci
->urb_remove_list_lock
, flags
);
out
+= sprintf26
(out
, "Complete list URBs:");
spin_lock_irqsave
(&uhci
->complete_list_lock
, flags
);
if (list_empty
(&uhci
->complete_list
))
out
+= sprintf26
(out
, " Empty\n");
else {
out
+= sprintf26
(out
, "\n");
count
= 0;
head
= &uhci
->complete_list
;
tmp
= head
->next
;
while (tmp
!= head
) {
struct urb_priv
*urbp
= list_entry
(tmp
, struct urb_priv
, complete_list
);
out
+= sprintf26
(out
, " %d: ", ++count
);
out
+= uhci_show_urbp
(uhci
, urbp
, out
, len
- (out
- buf
));
tmp
= tmp
->next
;
}
}
spin_unlock_irqrestore
(&uhci
->complete_list_lock
, flags
);
return out
- buf
;
}
static int uhci_sprint_schedule
(struct uhci_hcd
*uhci
, char *buf
, int len
)
{
unsigned long flags
;
char *out
= buf
;
int i
;
struct uhci_qh
*qh
;
struct uhci_td
*td
;
struct list_head
*tmp
, *head
;
spin_lock_irqsave
(&uhci
->frame_list_lock
, flags
);
out
+= sprintf26
(out
, "HC status\n");
out
+= uhci_show_status
(uhci
, out
, len
- (out
- buf
));
out
+= sprintf26
(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
+= sprintf26
(out
, " frame list does not match td->dma_handle!\n");
}
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
+= sprintf26
(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);
}
/* Last QH is the Terminating QH, it's different */
if (i
== UHCI_NUM_SKELQH
- 1) {
if (qh
->link
!= UHCI_PTR_TERM
)
out
+= sprintf26
(out
, " bandwidth reclamation on!\n");
if (qh
->element
!= cpu_to_le32
(uhci
->term_td
->dma_handle
))
out
+= sprintf26
(out
, " skel_term_qh element is not set to term_td!\n");
continue;
}
if (list_empty
(&qh
->list
)) {
if (i
< UHCI_NUM_SKELQH
- 1) {
if (qh
->link
!=
(cpu_to_le32
(uhci
->skelqh
[i
+ 1]->dma_handle
) | UHCI_PTR_QH
)) {
show_qh_name
();
out
+= sprintf26
(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
< UHCI_NUM_SKELQH
- 1) {
if (qh
->link
!=
(cpu_to_le32
(uhci
->skelqh
[i
+ 1]->dma_handle
) | UHCI_PTR_QH
))
out
+= sprintf26
(out
, " last QH not linked to next skeleton!\n");
}
}
spin_unlock_irqrestore
(&uhci
->frame_list_lock
, flags
);
if (debug
> 2)
out
+= uhci_show_lists
(uhci
, out
, len
- (out
- buf
));
return out
- buf
;
}
#define MAX_OUTPUT (64 * 1024)
static struct proc_dir_entry
*uhci_proc_root
= NULL
;
struct uhci_proc
{
int size
;
char *data
;
struct uhci_hcd
*uhci
;
};
static int uhci_proc_open
(struct inode
*inode
, struct file
*file
)
{
const struct proc_dir_entry
*dp
= PDE
(inode
);
struct uhci_hcd
*uhci
= dp
->data
;
struct uhci_proc
*up
;
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
;
}
up
->size
= uhci_sprint_schedule
(uhci
, up
->data
, MAX_OUTPUT
);
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
;
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_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
;
if (copy_to_user
(buf
, up
->data
+ pos
, nbytes
))
return -EFAULT
;
*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