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1 | Linux ACM driver v0.16 |
2 | (c) 1999 Vojtech Pavlik <vojtech@suse.cz> |
3 | Sponsored by SuSE |
4 | ---------------------------------------------------------------------------- |
5 | |
6 | 0. Disclaimer |
7 | ~~~~~~~~~~~~~ |
8 | This program is free software; you can redistribute it and/or modify it |
9 | under the terms of the GNU General Public License as published by the Free |
10 | Software Foundation; either version 2 of the License, or (at your option) |
11 | any later version. |
12 | |
13 | This program is distributed in the hope that it will be useful, but |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
16 | more details. |
17 | |
18 | You should have received a copy of the GNU General Public License along |
19 | with this program; if not, write to the Free Software Foundation, Inc., 59 |
20 | Temple 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, |
24 | Ucitelska 1576, Prague 8, 182 00 Czech Republic |
25 | |
26 | For your convenience, the GNU General Public License version 2 is included |
27 | in the package: See the file COPYING. |
28 | |
29 | 1. Usage |
30 | ~~~~~~~~ |
31 | The drivers/usb/class/cdc-acm.c drivers works with USB modems and USB ISDN terminal |
32 | adapters that conform to the Universal Serial Bus Communication Device Class |
33 | Abstract 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 |
54 | thus 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 |
63 | minicom, ppp and mgetty with them. |
64 | |
65 | 2. Verifying that it works |
66 | ~~~~~~~~~~~~~~~~~~~~~~~~~~ |
67 | The first step would be to check /proc/bus/usb/devices, it should look |
68 | like this: |
69 | |
70 | T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 |
71 | B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 |
72 | D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 |
73 | P: Vendor=0000 ProdID=0000 Rev= 0.00 |
74 | S: Product=USB UHCI Root Hub |
75 | S: SerialNumber=6800 |
76 | C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA |
77 | I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub |
78 | E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms |
79 | T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 |
80 | D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2 |
81 | P: Vendor=04c1 ProdID=008f Rev= 2.07 |
82 | S: Manufacturer=3Com Inc. |
83 | S: Product=3Com U.S. Robotics Pro ISDN TA |
84 | S: SerialNumber=UFT53A49BVT7 |
85 | C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA |
86 | I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=acm |
87 | E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms |
88 | E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms |
89 | E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms |
90 | C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA |
91 | I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm |
92 | E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms |
93 | I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm |
94 | E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms |
95 | E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms |
96 | |
97 | The presence of these three lines (and the Cls= 'comm' and 'data' classes) |
98 | is important, it means it's an ACM device. The Driver=acm means the acm |
99 | driver is used for the device. If you see only Cls=ff(vend.) then you're out |
100 | of luck, you have a device with vendor specific-interface. |
101 | |
102 | D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 2 |
103 | I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=acm |
104 | I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=acm |
105 | |
106 | In the system log you should see: |
107 | |
108 | usb.c: USB new device connect, assigned device number 2 |
109 | usb.c: kmalloc IF c7691fa0, numif 1 |
110 | usb.c: kmalloc IF c7b5f3e0, numif 2 |
111 | usb.c: skipped 4 class/vendor specific interface descriptors |
112 | usb.c: new device strings: Mfr=1, Product=2, SerialNumber=3 |
113 | usb.c: USB device number 2 default language ID 0x409 |
114 | Manufacturer: 3Com Inc. |
115 | Product: 3Com U.S. Robotics Pro ISDN TA |
116 | SerialNumber: UFT53A49BVT7 |
117 | acm.c: probing config 1 |
118 | acm.c: probing config 2 |
119 | ttyACM0: USB ACM device |
120 | acm.c: acm_control_msg: rq: 0x22 val: 0x0 len: 0x0 result: 0 |
121 | acm.c: acm_control_msg: rq: 0x20 val: 0x0 len: 0x7 result: 7 |
122 | usb.c: acm driver claimed interface c7b5f3e0 |
123 | usb.c: acm driver claimed interface c7b5f3f8 |
124 | usb.c: acm driver claimed interface c7691fa0 |
125 | |
126 | If all this seems to be OK, fire up minicom and set it to talk to the ttyACM |
127 | device and try typing 'at'. If it responds with 'OK', then everything is |
128 | working. |
129 |
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