lsusb -v shows this for the Epson Printer:
Bus 002 Device 003: ID 04b8:0202 Seiko Epson Corp. Receipt Printer M129C
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x04b8 Seiko Epson Corp.
idProduct 0x0202 Receipt Printer M129C
bcdDevice 1.00
iManufacturer 1 EPSON
iProduct 2 TM-T88IV
iSerial 3 J4FG004754
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 2
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0001
Self Powered
----------------------------------------------------------------------
I have been able to do usblp recognize it changing this more lines in
usblp.c.
/* Analyze and pick initial alternate settings and endpoints. */
protocol = usblp_select_alts(usblp);
if (protocol < 0) {
dbg("incompatible printer-class device 0x%4.4X/0x%4.4X",
le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
goto abort;
}
here i change "if (protocol < 0) {" for "if (protocol < -2000) {"
----------------------------------------------------------------------
/* Setup the selected alternate setting and endpoints. */
if (usblp_set_protocol(usblp, protocol) < 0)
goto abort;
here i change "(usblp_set_protocol(usblp, protocol) < 0)" for
"(usblp_set_protocol(usblp, protocol) < -2000)"
----------------------------------------------------------------------
when i compile the module and install with insmod dmesg gives me this
output.
drivers/usb/class/usblp.c: usblp0: USB Unidirectional printer dev 3 if 0
alt -1 proto 0 vid 0x04B8 pid 0x0202
usbcore: registered new driver usblp
drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver
and i have the "/dev/usb/lp0" device but when i try to print anything.
"echo test > /dev/usb/lp0" it fails and gives me this errors in dmesg:
BUG: unable to handle kernel NULL pointer dereference at virtual address
00000000
printing eip:
c0281e4b
*pde = 00000000
Oops: 0002 [#1]
SMP
Modules linked in: usblp nvidia ppdev lp button ac battery ipv6
dm_snapshot dm_mirror dm_mod loop tsdev snd_intel8x0 snd_ac97_codec
snd_ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_timer parport_pc
parport psmouse snd rtc floppy i2c_i801 serio_raw soundcore i2c_core
snd_page_alloc pcspkr intel_agp shpchp pci_hotplug agpgart evdev ext3
jbd mbcache raid10 raid456 xor raid1 raid0 multipath linear md_mod
ide_disk generic 8139too piix ide_core 8139cp mii ehci_hcd uhci_hcd
usbcore thermal processor fan
CPU: 0
EIP: 0060:[<c0281e4b>] Tainted: P VLI
EFLAGS: 00010246 (2.6.18-4-686 #1)
EIP is at iret_exc+0x55f/0x782
eax: 00000000 ebx: f74a33c0 ecx: 00000005 edx: 080f5c08
esi: 080f5c08 edi: 00000000 ebp: 00000000 esp: dfcf3f38
ds: 007b es: 007b ss: 0068
Process bash (pid: 2918, ti=dfcf2000 task=c1967550 task.ti=dfcf2000)
Stack: 00000005 00000005 f8ad7a3c 080f5c08 f8ad7c82 00000005 080f5c08
f50dc5c0
00000005 00000000 00000000 00000000 00000000 00000000 dfc87b58
f50dc5c0
f8ad7a3c 080f5c08 00000005 c015a5db dfcf3fa4 f50dc5c0 fffffff7
080f5c08
Call Trace:
[<f8ad7a3c>] usblp_write+0x0/0x30e [usblp]
[<f8ad7c82>] usblp_write+0x246/0x30e [usblp]
[<f8ad7a3c>] usblp_write+0x0/0x30e [usblp]
[<c015a5db>] vfs_write+0xa1/0x143
[<c015abcb>] sys_write+0x3c/0x63
[<c0102c11>] sysenter_past_esp+0x56/0x79
Code: f3 ff 01 c1 e9 95 91 f3 ff 8d 0c 88 e9 8d 91 f3 ff 01 c1 e9 be 91
f3 ff 8d 0c 88 e9 b6 91 f3 ff 01 c1 eb 03 8d 0c 88 51 50 31 c0 <f3> aa
58 59 e9 da 91 f3 ff ba f2 ff ff ff e9 60 92 f3 ff 8d 0c
EIP: [<c0281e4b>] iret_exc+0x55f/0x782 SS:ESP 0068:dfcf3f38
hehehe i would be better long away from kernel code i think :).
Regards Miguel Angel.
El jue, 08-03-2007 a las 11:08 -0500, Alan Stern escribió:
> On Thu, 8 Mar 2007, Linos wrote:
>
> > Hello i am trying to make work an Epson Receipt Printer M129C with usb
> > cable, well i have searched in the list but i have not found a solution,
> > usblp seems to not detect the printer so i have no /dev/usb/lp0 device
> > and i cant access the printer.
> >
> >
> > lsusb:
> >
> > Bus 004 Device 003: ID 0bda:8187 Realtek Semiconductor Corp.
> > Bus 004 Device 002: ID 05e3:0606 Genesys Logic, Inc.
> > Bus 004 Device 001: ID 0000:0000
> > Bus 003 Device 010: ID 04b8:0202 Seiko Epson Corp. Receipt Printer M129C
> > Bus 003 Device 001: ID 0000:0000
> > Bus 002 Device 009: ID 04f9:011e Brother Industries, Ltd
> > Bus 002 Device 004: ID 1130:cc00 Tenx Technology, Inc.
> > Bus 002 Device 001: ID 0000:0000
> > Bus 001 Device 001: ID 0000:0000
> >
> >
> > when i disconnect and reconnect it i get this from dmesg:
> >
> > drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver
> > usb 3-1: USB disconnect, address 10
> > usb 3-1: new full speed USB device using uhci_hcd and address 11
> > usb 3-1: configuration #1 chosen from 1 choice
> >
> > I have been searching in google, reading all i have found about this
> > problem but i cant get it works, i has been so frustrated with that
> > problem that i have been searching the mode to force usblp to detect it
> > but it doesnt works, i have added the last line to this struct in
> > usblp.c:
> >
> > static struct usb_device_id usblp_ids [] = {
> > { USB_DEVICE_INFO(7, 1, 1) },
> > { USB_DEVICE_INFO(7, 1, 2) },
> > { USB_DEVICE_INFO(7, 1, 3) },
> > { USB_INTERFACE_INFO(7, 1, 1) },
> > { USB_INTERFACE_INFO(7, 1, 2) },
> > { USB_INTERFACE_INFO(7, 1, 3) },
> > { USB_DEVICE(0x04b8, 0x0202), }, /* Seiko Epson Corp. Receipt
> > Printer M129C */
> > { } /* Terminating
> > entry */
> > };
> >
> > recompile module and install it but now i have this error on printer
> > reconnect:
> >
> > usblp: probe of 3-1:1.0 failed with error -5
> > usb 3-1: device_add(3-1:1.0) --> -5
> >
> > anyone on the list can help me please? i would like very pleased, thanks
> > in advance.
>
> What does "lsusb -v" show for the printer?
>
> Alan Stern
>
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