嵌入式平台USB驱动程序移植（zc0301p 摄像头）

来源：互联网发布：长沙牛耳软件教育编辑：程序博客网时间：2024/05/16 12:32

关键词： zc0301p s3c2410 linux2.6.11.1

（参考了一个开源的项目，可能有些乱，但是不想整理了）

USB Camera Porting Guide

1、修改drivers/usb/Makefile文件，在

obj-$(CONFIG_USB_W9968CF) += media/

之后添加一行：

obj-$(CONFIG_USB_SPCA5XX) += media/

2、修改drivers/usb/media/Kconfig文件，在最后添加：

config USB_SPCA5XX

tristate "USB SPCA5XX Sunplus/Vimicro/Sonix jpeg Cameras"

depends on USB && VIDEO_DEV

---help---

Say Y or M here if you want to use one of these webcams:

The built-in microphone is enabled by selecting USB Audio support.

This driver uses the Video For Linux API. You must say Y or M to

"Video For Linux" (under Character Devices) to use this driver.

Information on this API and pointers to "v4l" programs may be found

at <file:Documentation/video4linux/API.html>.

To compile this driver as a module, choose M here: the

module will be called spca5xx.

3、修改drivers/usb/media/Makefile ，添加：

obj-$(CONFIG_USB_SPCA5XX) += spca5xx/

4、在usb/media目录下建立spca5xx目录

#mkdir drivers/usb/media/spca5xx

5、在drivers/usb/media/spca5xx添加如下文件：这些代码可以从http://mxhaard.free.fr/spca50x/Doc/KernelPatch/usb-2.6.12.patch.tar.gz

中下载

（1）、cs2102.h

（2）、hdcs2020.h

（3）、hv7131b.h

（4）、hv7131c.h

（5）、icm105a.h

（6）、Makefile

（7）、Makefile.2.4

（8）、Makefile.org

（9）、pas106b.h

（10）、pb0330.h

（11）、sn9cxxx.h

（12）、sp5xxfw2.dat

（13）、sp5xxfw2.h

（14）、spca5xx.h

（15）、spcaCompat.h

（16）、spca_core.c

（17）、spcadecoder.c

（19）、spcadecoder.h

（20）、spcausb.h

（21）、tas5130c.h

（22）、zc3xx.h

6、配置内核

（1）、

Multimedia devices --->

<M> Video For Linux

（2）、

USB support --->

<M> Support for Host-side USB

--- USB Host Controller Drivers

<M> OHCI HCD support

（3）、

--- USB Multimedia devices

<M> USB SPCA5XX Sunplus/Vimicro/Sonix jpeg Cameras

7、编译内核及模块

#make uImage

#make modules

8、拷贝模块文件到开发板文件系统目录下

walker/

walker/module_file

cp drivers/media/video/v4l1-compat.ko /friendly-arm/rootfs_netserv/home/walker/module_file

cp drivers/media/video/v4l2-common.ko /friendly-arm/rootfs_netserv/home/walker/module_file

cp drivers/media/video/videodev.ko /friendly-arm/rootfs_netserv/home/walker/module_file

cp drivers/usb/core/usbcore.ko /friendly-arm/rootfs_netserv/home/walker/module_file

cp drivers/usb/media/spca5xx/spca5xx.ko /friendly-arm/rootfs_netserv/home/walker/module_file

9、将USB摄像头插入开发板（注：必须先插入摄像头才能插入模块文件，否则系统会出现kernel oops）

10、重新启动开发板

11、插入模块文件（注：这里必须注意模块的插入顺序，这是因为模块的依赖关系）

/sbin/insmod /home/walker/usbcore.ko

/sbin/insmod /home/walker/ohci-hcd.ko

/sbin/insmod /home/walker/v4l1-compat.ko

/sbin/insmod /home/walker/v4l2-common.ko

/sbin/insmod /home/walker/videodev.ko

/sbin/insmod /home/walker/spca5xx.ko

插入以上模块之后，建立设备文件

/bin/mknod /dev/video0 c 81 0

或者采用系统默认的设备文件

ln -sf /dev/v4l/video0 /dev/video0

或将以上语句写如etc/init.d/rcS文件中，当开发板启动的时候自动加载模块。

12、用命令测试

cat /dev/video0 > /tmp/a.jpg

或：

cat /dev/v4l/video0 > /tmp/a.jpg

此命令用来抓取一副图像，可以用Ctrl+c来中断该命令

图像抓取后，在PC上可以采用gqview查看

模块问题：

1、在装载摄像头驱动模块之前将摄像头插入开发板USB接口中，然后加载驱动模块文件，这时摄像头可以正常工作；此时拔掉摄像头，接着卸载驱动模块，

rmmod spca5xx

usbcore: deregistering driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: driver spca5xx deregistered

然后插入摄像头

usb 1-1: new full speed USB device using s3c2410-ohci and address 3

装载驱动模块：

~ # insmod /home/walker/module_file/spca5xx.ko

drivers/usb/media/spca5xx/spca_core.c: USB SPCA5XX camera found. Type Vimicro Zc301P 0x303b

usbcore: registered new driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: spca5xx driver 00.57.06LE registered

摄像头可以正常工作

2、在装载驱动模块之后再将摄像头插入开发板当中，则会显示：

~ # usb 1-1: new full speed USB device using s3c2410-ohci and address 2

Unable to handle kernel paging request at virtual address bf03b04e

pgd = c0004000

[bf03b04e] *pgd=33e5f011, *pte=00000000, *ppte=00000000

Internal error: Oops: 7 [#1]

Modules linked in: spca5xx videodev v4l2_common v4l1_compat ohci_hcd usbcore

CPU: 0

PC is at usb_match_id+0x14/0x1b0 [usbcore]

LR is at usb_device_match+0x28/0x40 [usbcore]

pc : [<bf0003a8>] lr : [<bf0005c8>] Not tainted

sp : c3e63e4c ip : c3e63e5c fp : c3e63e58

r10: 00000000 r9 : 00000001 r8 : 00000000

r7 : c0018d0c r6 : bf011188 r5 : c0018cb4 r4 : bf038e90

r3 : 00000000 r2 : c0018d0c r1 : bf03b04c r0 : c0018ca0

Flags: NzCv IRQs on FIQs on Mode SVC_32 Segment user

Control: 717F Table: 33DE4000 DAC: 00000015

Process khubd (pid: 22, stack limit = 0xc3e62194)

Stack: (0xc3e63e4c to 0xc3e64000)

3e40: c3e63e68 c3e63e5c bf0005c8 bf0003a4 c3e63e80

3e60: c3e63e6c c0103330 bf0005b0 bf038ec4 c0018cb4 c3e63e9c c3e63e84 c01033d0

3e80: c010330c c0018cb4 bf011128 c0018cd8 c3e63eb4 c3e63ea0 c01036b0 c010338c

3ea0: c0018cb4 c3c5a664 c3e63ed8 c3e63eb8 c0102628 c0103668 c0018ca0 c3c5a600

3ec0: c3c088c8 00000000 c3c5a404 c3e63f24 c3e63edc bf007578 c01025bc 00000001

3ee0: 00000000 00000000 00000000 000003e8 c3e22860 c3c5a400 00000001 c3c5a600

3f00: 00000000 00000001 c3c5a664 00000001 c0018e34 c3c2ea00 c3e63f48 c3e63f28

3f20: bf0026d4 bf007240 00000000 00000000 c3c5a600 c3c5a624 c0018d60 c3e63f7c

3f40: c3e63f4c bf0035dc bf002634 00000000 bf001174 c0018d60 00000001 c3c2ea00

3f60: c0018e34 00000001 00000000 c0018e20 c3e63fac c3e63f80 bf003910 bf003334

3f80: 01010001 c3e63fc0 c3e63fc0 c3e62000 c3e63fc4 bf01122c 00000000 00000000

3fa0: c3e63ff4 c3e63fb0 bf003a0c bf0036cc 00000000 c3c37300 c004e16c c3e63fd0

3fc0: c3e63fd0 00000000 c3c37300 c004e16c c3e63fd0 c3e63fd0 00000000 00000000

3fe0: 00000000 00000000 00000000 c3e63ff8 c003c240 bf0039f4 00400002 084a0024

Backtrace:

[<bf000394>] (usb_match_id+0x0/0x1b0 [usbcore]) from [<bf0005c8>] (usb_device_match+0x28/0x40 [usbcore])

[<bf0005a0>] (usb_device_match+0x0/0x40 [usbcore]) from [<c0103330>] (driver_probe_device+0x34/0x80)

[<c01032fc>] (driver_probe_device+0x0/0x80) from [<c01033d0>] (device_attach+0x54/0x94)

r5 = C0018CB4 r4 = BF038EC4

[<c010337c>] (device_attach+0x0/0x94) from [<c01036b0>] (bus_add_device+0x58/0x88)

r6 = C0018CD8 r5 = BF011128 r4 = C0018CB4

[<c0103658>] (bus_add_device+0x0/0x88) from [<c0102628>] (device_add+0x7c/0x108)

r5 = C3C5A664 r4 = C0018CB4

[<c01025ac>] (device_add+0x0/0x108) from [<bf007578>] (usb_set_configuration+0x348/0x3bc [usbcore])

r8 = C3C5A404 r7 = 00000000 r6 = C3C088C8 r5 = C3C5A600

r4 = C0018CA0

[<bf007230>] (usb_set_configuration+0x0/0x3bc [usbcore]) from [<bf0026d4>] (usb_new_device+0xb0/0x124 [usbcore])

[<bf002624>] (usb_new_device+0x0/0x124 [usbcore]) from [<bf0035dc>] (hub_port_connect_change+0x2b8/0x398 [usbcore])

r7 = C0018D60 r6 = C3C5A624 r5 = C3C5A600 r4 = 00000000

[<bf003324>] (hub_port_connect_change+0x0/0x398 [usbcore]) from [<bf003910>] (hub_events+0x254/0x328 [usbcore])

[<bf0036bc>] (hub_events+0x0/0x328 [usbcore]) from [<bf003a0c>] (hub_thread+0x28/0x104 [usbcore])

[<bf0039e4>] (hub_thread+0x0/0x104 [usbcore]) from [<c003c240>] (do_exit+0x0/0x33c)

r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000

Code: e92dd800 e24cb004 e3510000 0a000052 (e1d130b2)

3、实验：在未将scsi_mod.ko、sd_mod.ko、usb-storage.ko等模块加载进内核时，将U盘插入开发板当中，则系统出现如2一样的oops错误。把U盘拔出，并把usb-storage.ko模块卸载掉，然后再次将U盘插入开发板，仍然出现上面一样的oops错误。

4、将所有涉及的功能模块都静态编译进内核，在内核启动之前将摄像头插入开发板，然后启动内核，摄像头正常工作，此时把摄像头拔出，再次插入开发板，则摄像头无法正常工作

~ # cat /dev/video0 > /tmp/tmp.jpg

cat: /dev/video0: No such device

5、要使摄像头能工作，必须在将摄像头插入开发板后加载模块。

（1）、启动内核；

（2）、ls /dev

~ # ls /dev/

console kmem mtd ptmx rd tty vcc

fb kmsg mtdblock pts scsi urandom zero

full mem null pty shm usb

input misc port random tts vc

（3）、将摄像头插入开发板，有如下信息：

~ # usb 1-1: new full speed USB device using s3c2410-ohci and address 2

usb 1-1: Product: PC Camera

usb 1-1: Manufacturer: Vimicro Corp.

（4）、ls /dev

~ # ls /dev

console kmem mtd ptmx rd tty vcc

fb kmsg mtdblock pts scsi urandom zero

full mem null pty shm usb

input misc port random tts vc

（5）、插入摄像头驱动模块

~ # insmod /home/walker/module_file/spca5xx.ko

drivers/usb/media/spca5xx/spca_core.c: USB SPCA5XX camera found. Type Vimicro Zc301P 0x303b

usbcore: registered new driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: spca5xx driver 00.57.06LE registered

（6）ls /dev

~ # ls /dev

console kmem mtd ptmx rd tty vc

fb kmsg mtdblock pts scsi urandom vcc

full mem null pty shm usb zero

input misc port random tts v4l

（7）、

~ # ls /dev/v4l/

video0

此时可以正常使用摄像头

（8）、卸载摄像头驱动模块

~ # rmmod spca5xx

usbcore: deregistering driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: driver spca5xx deregistered

（9）、ls /dev/v4l

没有video0设备

（10）、不拔摄像头，再次装载驱动模块

~ # insmod /home/walker/module_file/spca5xx.ko

drivers/usb/media/spca5xx/spca_core.c: USB SPCA5XX camera found. Type Vimicro Zc301P 0x303b

usbcore: registered new driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: spca5xx driver 00.57.06LE registered

（11）、~ # ls /dev/v4l/

video0

（12）、卸载驱动模块~ # usb 1-1: new full speed USB device using s3c2410-ohci and address 3

usb 1-1: Product: PC Camera

usb 1-1: Manufacturer: Vimicro Corp.

Unable to handle kernel paging request at virtual address bf05704e

pgd = c0004000

[bf05704e] *pgd=33ec1011, *pte=00000000, *ppte=00000000

Internal error: Oops: 7 [#1]

Modules linked in: spca5xx videodev v4l2_common v4l1_compat usb_storage usbkbd ohci_hcd usbcore

CPU: 0

PC is at usb_match_id+0x14/0x1b0 [usbcore]

LR is at usb_device_match+0x28/0x40 [usbcore]

pc : [<bf000400>] lr : [<bf000620>] Not tainted

sp : c3e4fe24 ip : c3e4fe34 fp : c3e4fe30

r10: 00000000 r9 : 00000001 r8 : 00000000

r7 : c3c5d94c r6 : bf01a5f0 r5 : c3c5d8f4 r4 : bf054e90

r3 : 00000000 r2 : c3c5d94c r1 : bf05704c r0 : c3c5d8e0

Flags: NzCv IRQs on FIQs on Mode SVC_32 Segment user

Control: 717F Table: 3030C000 DAC: 00000015

Process khubd (pid: 22, stack limit = 0xc3e4e194)

Stack: (0xc3e4fe24 to 0xc3e50000)

fe20: c3e4fe40 c3e4fe34 bf000620 bf0003fc c3e4fe58 c3e4fe44 c0104330

fe40: bf000608 bf054ec4 c3c5d8f4 c3e4fe74 c3e4fe5c c01043d0 c010430c c3c5d8f4

fe60: bf01a590 c3c5d918 c3e4fe8c c3e4fe78 c01046b0 c010438c c3c5d8f4 c3c9aa64

fe80: c3e4feb0 c3e4fe90 c0103628 c0104668 c3c5d8e0 c3c9aa00 c3c9aabc 00000000

fea0: c3c5d94c c3e4fefc c3e4feb4 bf0085b0 c01035bc 00000001 00000000 00000000

fec0: 00000000 000003e8 c3e4bda0 c3c9ae00 00000001 00000000 c3c9aa00 00000001

fee0: c3c9aabc c3c9aa64 c3c5da74 c3c9a400 c3e4ff28 c3e4ff00 bf002dc4 bf00823c

ff00: 00000002 00000000 00000000 c3c9aa00 c3c9aa24 00000001 c3c5d9a0 c3e4ff6c

ff20: c3e4ff2c bf003e88 bf002c9c 00000101 00000001 bf01025c c3c5dacc 00000000

ff40: bf001228 00000000 c3c5da74 c3c5d9a0 00000001 c3c9a400 c3c5da60 00000001

ff60: c3e4ffac c3e4ff70 bf00431c bf003b64 00000002 00000000 00000002 01010001

ff80: c3c7b450 c3e4ffc0 c3e4e000 c3e4ffc4 bf01a694 00000000 00000000 00000000

ffa0: c3e4fff4 c3e4ffb0 bf004474 bf003fc8 00000000 c3c7b300 c004f16c c3e4ffd0

ffc0: c3e4ffd0 00000000 c3c7b300 c004f16c c3e4ffd0 c3e4ffd0 00000000 00000000

ffe0: 00000000 00000000 00000000 c3e4fff8 c003d240 bf00445c e3510000 15911000

Backtrace:

[<bf0003ec>] (usb_match_id+0x0/0x1b0 [usbcore]) from [<bf000620>] (usb_device_match+0x28/0x40 [usbcore])

[<bf0005f8>] (usb_device_match+0x0/0x40 [usbcore]) from [<c0104330>] (driver_probe_device+0x34/0x80)

[<c01042fc>] (driver_probe_device+0x0/0x80) from [<c01043d0>] (device_attach+0x54/0x94)

r5 = C3C5D8F4 r4 = BF054EC4

[<c010437c>] (device_attach+0x0/0x94) from [<c01046b0>] (bus_add_device+0x58/0x88)

r6 = C3C5D918 r5 = BF01A590 r4 = C3C5D8F4

[<c0104658>] (bus_add_device+0x0/0x88) from [<c0103628>] (device_add+0x7c/0x108)

r5 = C3C9AA64 r4 = C3C5D8F4

[<c01035ac>] (device_add+0x0/0x108) from [<bf0085b0>] (usb_set_configuration+0x384/0x3fc [usbcore])

r8 = C3C5D94C r7 = 00000000 r6 = C3C9AABC r5 = C3C9AA00

r4 = C3C5D8E0

[<bf00822c>] (usb_set_configuration+0x0/0x3fc [usbcore]) from [<bf002dc4>] (usb_new_device+0x138/0x1cc [usbcore])

[<bf002c8c>] (usb_new_device+0x0/0x1cc [usbcore]) from [<bf003e88>] (hub_port_connect_change+0x334/0x464 [usbcore])

r8 = C3C5D9A0 r7 = 00000001 r6 = C3C9AA24 r5 = C3C9AA00

r4 = 00000000

[<bf003b54>] (hub_port_connect_change+0x0/0x464 [usbcore]) from [<bf00431c>] (hub_events+0x364/0x494 [usbcore])

[<bf003fb8>] (hub_events+0x0/0x494 [usbcore]) from [<bf004474>] (hub_thread+0x28/0x11c [usbcore])

[<bf00444c>] (hub_thread+0x0/0x11c [usbcore]) from [<c003d240>] (do_exit+0x0/0x33c)

r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000

Code: e92dd800 e24cb004 e3510000 0a000052 (e1d130b2)

~ # rmmod spca5xx

usbcore: deregistering driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: driver spca5xx deregistered

（13）、拔出摄像头

~ # usb 1-1: USB disconnect, address 2

（14）、再次装载驱动模块

~ # insmod /home/walker/module_file/spca5xx.ko

usbcore: registered new driver spca5xx

drivers/usb/media/spca5xx/spca_core.c: spca5xx driver 00.57.06LE registered

（15）、插入摄像头

~ # usb 1-1: new full speed USB device using s3c2410-ohci and address 3