I am new to the Video4 linux. I am working PXA255 hybus arm platform.
I compiled the video4linux with in my kernel. Recently i got an
Logitech quickcam go camera. So i compiled the appropriate driver
spca5xx for the board kernel(2.4.18) and then inserted the module in the
board. After inserting the module i got the following message..
------------------------------------------------------------------
insmod spca5xx.o debug=4


usb.c: registered new driver spca5xx
drivers/usb/spca5xx.c: USB SPCA5XX camera found.Logitech QuickCam chat
(SPCA561A)
drivers/usb/spca5xx.c: [spca5xx_probe:5485] Camera type S561
drivers/usb/spca5xx.c: [spca50x_configure:3300] video_register_device
succeeded
drivers/usb/spca561.h: [spca561_config:741] Read from GLOBAL: USB Vendor
ID 0x046d
drivers/usb/spca561.h: [spca561_config:744] Read from GLOBAL: USB
Product ID 0x092f
drivers/usb/spca5xx.c: [spca50x_set_packet_size:1443] set real packet
size: 0, alt=0
drivers/usb/spca5xx.c: [spca5xx_getcapability:1767] maxw 352 maxh 288
minw 160 minh 120
drivers/usb/spca5xx.c: [spca50x_configure:3323] Spca5xx Configure
done !!
drivers/usb/spca5xx.c: [spca5xx_probe:5519] setting video device =
c336c2e0, spca50x = c3cbc000
drivers/usb/spca5xx.c: [create_proc_spca50x_cam:1248]
creating /proc/video/spca50x/video0
drivers/usb/spca5xx.c: [create_proc_spca50x_cam:1264]
creating /proc/video/spca50x/control0
drivers/usb/spca5xx.c: spca5xx driver 00.60.00.1 registered
-----------------------------------------------------------------------

It seems everything to be ok... But when i run simply like this..
-----------------------------------------------------------------------
cat /dev/video0

drivers/usb/spca5xx.c: [spca5xx_open:2406] opening
drivers/usb/spca5xx.c: [spca50x_alloc:2194] entered
drivers/usb/spca5xx.c: [spca50x_alloc:2213] frame[0] @ c8b10000
drivers/usb/spca5xx.c: [spca50x_alloc:2213] frame[1] @ c8c3c008
drivers/usb/spca5xx.c: [spca50x_alloc:2222] sbuf[0] @ c2a6c000
drivers/usb/spca5xx.c: [spca50x_alloc:2222] sbuf[1] @ c2a70000
drivers/usb/spca5xx.c: [spca50x_alloc:2227] leaving
drivers/usb/spca561.h: [spca561_init:497] Find spca561 USB Product ID
92f
drivers/usb/spca5xx.c: [spca5xx_setMode:1827] spca5xx set mode asked w
160 h 120 p 4
drivers/usb/spca5xx.c: [spca5xx_setMode:1900] Found code 3 method 0
drivers/usb/spca5xx.c: [spca5xx_setMode:1902] Soft Win width height 160
x 120
drivers/usb/spca5xx.c: [spca5xx_setMode:1904] Hard Win width height 160
x 120
drivers/usb/spca5xx.c: [spca50x_init_isoc:1585] *** Initializing capture
***
drivers/usb/spca5xx.c: [spca50x_set_packet_size:1443] set real packet
size: 1023, alt=7
drivers/usb/spca5xx.c: [spca50x_init_isoc:1594] setpacketsize 1023
drivers/usb/spca561.h: [spca561_setcontrast:693] Set Exposure 0x00 0x20
gain 0x03
qu_queue_active_urb: add urb to iso_list, start_frame = 0xc8, # Pkts =
0x10, err Cnt = 0x0
<6>drivers/usb/spca5xx.c: [spca5xx_open:2467] Open done
drivers/usb/spca5xx.c: [spca5xx_read:3119] 4096 bytes, noblock=0
drivers/usb/spca5xx.c: [spca5xx_read:3137] Waiting for a frame done
----------------------------------------------------------------------


Before running any tool like gqcam, spcaview...i want to confirm whether
my camera is detected properly or not. Is their any way that i can
check it by simple commands...

i tried vcat but it for v4l2. There is a patching work required...


Please help me in solving this issue...

something very funny

means?? I don't get you??

don't listen to him. he only has 2 posts.

HES A n0000b!!!!!!!!

lolz. anyway, why don't you just test to see if it works with mplayer or something? no need to be a know-it-all-command-line-juggernaut

Hi...thanks for your reply...

I think the tool is not the problem...It is problem with the driver itself...

when i insert the module with insmod i am getting the following kernel
messages...(i included this in the post)

drivers/usb/spca5xx.c: USB SPCA5XX camera found.Logitech QuickCam chat
(SPCA561A)

The above line clearly mentions that the Logitech QuickCam chat is
detecting the camera...

Moreover i don't have an lspci or lsusb command incorporated on my
board...but i mounted the usbdevfs on /proc/bus/usb....

and done cat /proc/bus/usb/devices---got the following message on the
camera detection part...
-----------------------------------------------------------------------
S: Product=Camera USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 0 Ivl= 1ms
I: If#= 0 Alt= 1 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 128 Ivl= 1ms
I: If#= 0 Alt= 2 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 880 Ivl= 1ms
I: If#= 0 Alt= 3 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 512 Ivl= 1ms
I: If#= 0 Alt= 4 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 640 Ivl= 1ms
I: If#= 0 Alt= 5 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 768 Ivl= 1ms
I: If#= 0 Alt= 6 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 896 Ivl= 1ms
I: If#= 0 Alt= 7 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS=1023 Ivl= 1ms
I: If#= 0 Alt= 8 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 544 Ivl= 1ms
I: If#= 0 Alt= 9 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 656 Ivl= 1ms
I: If#= 0 Alt=10 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 704 Ivl= 1ms
I: If#= 0 Alt=11 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 864 Ivl= 1ms
I: If#= 0 Alt=12 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 960 Ivl= 1ms
I: If#= 0 Alt=13 #EPs= 1 Cls=ff(vend.) Sub=00 Prot=00 Driver=spca5xx
E: Ad=81(I) Atr=01(Isoc) MxPS= 845 Ivl= 1ms
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 1
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 0.00
-----------------------------------------------------------------------

I am in to the driver code spca5xx.c today...there was a line like this
where the driver code stops executing..
------------------------------------------------------------------------

if ((rc = wait_event_interruptible(spca50x->wq,
spca50x->frame[0].grabstate ==
FRAME_DONE
|| spca50x->frame[1].grabstate ==
FRAME_DONE))) {

up(&spca50x->lock);
return rc;
}

------------------------------------------------------------------------
when it executes the wait_event_interruptible...it hangs on over
there...
I think the condition is not satisfied...Googled it and collected little
information about wait_event_interruptible, which will make the task
process to go to sleep untill the condition is satisfied...

The frames were never read..and it remains in the unused state...Ithink
there may be seperate thread which may be reading the frame...

I am in the process of finding it...Any idea you can think of this??

Hi...all

I found the reason for the problem... I got little information about the URB- Usb Request Block. which is the structure where all the data trasfer happens...

There was a line on my driver like this below...

urb->complete = spca50x_isoc_irq;

I think it means when the urb buffer is filled i.e., when the urb->status is 0 (Completed the usb transfer from camera) then the spca50x_isoc_irq function is called.

But this urb->complete is never happening..I mean the urb->status is never up. When i print the urb->status, it is -115. which means the Urb is still pending(untill now no error)...

Does anyone knows why the camera is not filling the urb block???Any idea??

Hello Ramesh,
I need help from you.I am using SPCA5xx web cam driver. My target details are as follows,
Processor- IXP425 big endian
Architecture- ARM5VT
Kernel- 2.4.20mvl(From Montavista)
Can you give the procedure you followed to cross compiling SPCA5xx for your board?
Thanks in Advance.

Donwload the source, change the makefile present over there...

Since the kernel is 2.4..remove the 2.6 part in the Makefile ...

I modified like this ..........
---------------------------------------------------------------

VERSION = 00.60.00.1
CVSVERSION = "$Experimental work Michel Xhaard && Reza Jelveh 03/02/2004"
DEFINES =

###
# The following flags enable experimental features.
# By default, these are enabled for development versions of the driver, and
# disabled for release versions.

# Optional: Enable driver debugging
DEFINES += -DSPCA50X_ENABLE_DEBUG

# Optional: Enable direct register read/write for PAC207 development
#DEFINES += -DSPCA5XX_ENABLE_REGISTERPLAY

###
# The following flags enable features that aren't yet implemented, and
# therefore are disabled by default.

# Optional: Enable compression
DEFINES += -DSPCA50X_ENABLE_COMPRESSION

###
# Rest of Makefile follows here. You probably won't need to touch this.

# Setup defines
DEFINES += -DCONFIG_USB_SPCA5XX_MODULE=1 -DMODULE -D__KERNEL__
DEFINES += -DVID_HARDWARE_SPCA5XX=0xFF -DSPCA5XX_VERSION=\"$(VERSION)\"


#############################################################################
# For Linux 2.4 users.
# Change the following lines according to your system configuration.
# It is important to configure your particular source tree ("make dep") before
# compiling this module!
#############################################################################
###
# This makefile will build the spca50x driver module external to the kernel
# source tree. It makes it easier to swap kernels.


KERNEL_VERSION = "2.4.18-rmk7-pxa1-xhyper255"
#Put the name of your kernel here... uname -r on your target gives this... your kernel source directory also should have the
same name

###
# Location of the header files (most importantly the config files)
# for the kernel you want to build the module against.
# This should be correct for the currently installed kernel on your machine.
KINCLUDE = /home/rameshchandra/Ramesh/temp/2.4.18-rmk7-pxa1-xhyper255/include
#RAMESHath of your kernel source.
KERNEL_ACFILE = $(KINCLUDE)/linux/autoconf.h
KERNEL_MODVERSIONSFILE = $(KINCLUDE)/linux/modversions.h
MODULE_INSTALLDIR = /home/rameshchandra/Ramesh/Mywork/Cameraresearch/Logitechspca5xx/myinstalls
#RAMESH:check whether the appropriate file is present in your kernel
# Detect module versioning support
ifneq ($(strip $(shell grep 'define CONFIG_MODVERSIONS 1' $(KERNEL_ACFILE))),)
DEFINES += -DMODVERSIONS -include $(KERNEL_MODVERSIONSFILE)
endif# Detect SMP support
ifneq ($(strip $(shell grep 'define CONFIG_SMP 1' $(KERNEL_ACFILE))),)
DEFINES += -D__SMP__ -DSMP
endif

# Setup the tools
CC = /usr/local/hybus-arm-linux-R1.1/bin/arm-linux-gcc
LD = /usr/local/hybus-arm-linux-R1.1/bin/arm-linux-ld

# Setup compiler warnings
WARNINGS = -Wall -Wpointer-arith
WARNINGS += -Wcast-align -Wwrite-strings -Wstrict-prototypes
WARNINGS += -Wuninitialized -Wreturn-type -Wunused -Wparentheses

# Setup compiler flags
CFLAGS = -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe
#CFLAGS += -mpreferred-stack-boundary=2
CFLAGS += -I$(KINCLUDE) -Idrivers/usb

# Setup link flags
LDFLAGS = --strip-debug -r

----------------------------------------------------------------
In the warning flags keep what i wrote... other wise it will show some errors...

Hope this helps you... CC and LD you must know...are the cross-compiler..point it to your toolchain...

i think you know about these...

then save the make file and then give make...

spca5xx should be compiled for the target.. But still no answer for my question...No one replying in this forum...??
spca5xx works well in system but not in boards...i don't know what is the reason may be low-level cypress drivers for usb may be problem...

Hope atleast you will tell me when you get success in the board..
Please let me know it...

Hello Ramesh,
Sorry for delay in reply. I am successful in compiling SPCA5xx v0.57 for Xscale. I have DMVC 1300K (camera is not listed in supporting list) Philips camera. When I connected the camera, it gave the error. Log is as below.


Regarding USB problem, I have seen the issue with with ARM in FAQ section. This may help you to debug the problem. http://www.cs.umu.se/~c00ahs/exjobb/philips/faq.html#I7


All The Best