1 Linux ACM driver v0.16 2 (c) 1999 Vojtech Pavlik <vojtech@suse.cz> 3 Sponsored by SuSE 4---------------------------------------------------------------------------- 5 60. Disclaimer 7~~~~~~~~~~~~~ 8 This program is free software; you can redistribute it and/or modify it 9under the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 2 of the License, or (at your option) 11any later version. 12 13 This program is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 16more details. 17 18 You should have received a copy of the GNU General Public License along 19with this program; if not, write to the Free Software Foundation, Inc., 59 20Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 22 Should you need to contact me, the author, you can do so either by e-mail 23- mail your message to <vojtech@suse.cz>, or by paper mail: Vojtech Pavlik, 24Ucitelska 1576, Prague 8, 182 00 Czech Republic 25 26 For your convenience, the GNU General Public License version 2 is included 27in the package: See the file COPYING. 28 291. Usage 30~~~~~~~~ 31 The drivers/usb/class/cdc-acm.c drivers works with USB modems and USB ISDN terminal 32adapters that conform to the Universal Serial Bus Communication Device Class 33Abstract Control Model (USB CDC ACM) specification. 34 35 Many modems do, here is a list of those I know of: 36 37 3Com OfficeConnect 56k 38 3Com Voice FaxModem Pro 39 3Com Sportster 40 MultiTech MultiModem 56k 41 Zoom 2986L FaxModem 42 Compaq 56k FaxModem 43 ELSA Microlink 56k 44 45 I know of one ISDN TA that does work with the acm driver: 46 47 3Com USR ISDN Pro TA 48 49 Some cell phones also connect via USB. I know the following phones work: 50 51 SonyEricsson K800i 52 53 Unfortunately many modems and most ISDN TAs use proprietary interfaces and 54thus won't work with this drivers. Check for ACM compliance before buying. 55 56 To use the modems you need these modules loaded: 57 58 usbcore.ko 59 uhci-hcd.ko ohci-hcd.ko or ehci-hcd.ko 60 cdc-acm.ko 61 62 After that, the modem[s] should be accessible. You should be able to use 63minicom, ppp and mgetty with them. 64 652. Verifying that it works 66~~~~~~~~~~~~~~~~~~~~~~~~~~ 67 The first step would be to check /sys/kernel/debug/usb/devices, it should look 68like this: 69 70T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 71B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 72D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 73P: Vendor=0000 ProdID=0000 Rev= 0.00 74S: Product=USB UHCI Root Hub 75S: SerialNumber=6800 76C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA 77I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub 78E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms 79T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 80D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2 81P: Vendor=04c1 ProdID=008f Rev= 2.07 82S: Manufacturer=3Com Inc. 83S: Product=3Com U.S. Robotics Pro ISDN TA 84S: SerialNumber=UFT53A49BVT7 85C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA 86I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=acm 87E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms 88E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms 89E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms 90C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA 91I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm 92E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms 93I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm 94E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms 95E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms 96 97The presence of these three lines (and the Cls= 'comm' and 'data' classes) 98is important, it means it's an ACM device. The Driver=acm means the acm 99driver is used for the device. If you see only Cls=ff(vend.) then you're out 100of luck, you have a device with vendor specific-interface. 101 102D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2 103I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm 104I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm 105 106In the system log you should see: 107 108usb.c: USB new device connect, assigned device number 2 109usb.c: kmalloc IF c7691fa0, numif 1 110usb.c: kmalloc IF c7b5f3e0, numif 2 111usb.c: skipped 4 class/vendor specific interface descriptors 112usb.c: new device strings: Mfr=1, Product=2, SerialNumber=3 113usb.c: USB device number 2 default language ID 0x409 114Manufacturer: 3Com Inc. 115Product: 3Com U.S. Robotics Pro ISDN TA 116SerialNumber: UFT53A49BVT7 117acm.c: probing config 1 118acm.c: probing config 2 119ttyACM0: USB ACM device 120acm.c: acm_control_msg: rq: 0x22 val: 0x0 len: 0x0 result: 0 121acm.c: acm_control_msg: rq: 0x20 val: 0x0 len: 0x7 result: 7 122usb.c: acm driver claimed interface c7b5f3e0 123usb.c: acm driver claimed interface c7b5f3f8 124usb.c: acm driver claimed interface c7691fa0 125 126If all this seems to be OK, fire up minicom and set it to talk to the ttyACM 127device and try typing 'at'. If it responds with 'OK', then everything is 128working. 129
