1 ======================
2 Linux ACM driver v0.16
3 ======================
4
5 Copyright (c) 1999 Vojtech Pavlik <vojtech@suse
6
7 Sponsored by SuSE
8
9 0. Disclaimer
10 ~~~~~~~~~~~~~
11 This program is free software; you can redistr
12 under the terms of the GNU General Public Lice
13 Software Foundation; either version 2 of the L
14 any later version.
15
16 This program is distributed in the hope that i
17 WITHOUT ANY WARRANTY; without even the implied
18 or FITNESS FOR A PARTICULAR PURPOSE. See the
19 more details.
20
21 You should have received a copy of the GNU Gen
22 with this program; if not, write to the Free S
23 Temple Place, Suite 330, Boston, MA 02111-1307
24
25 Should you need to contact me, the author, you
26 mail your message to <vojtech@suse.cz>, or by p
27 Ucitelska 1576, Prague 8, 182 00 Czech Republi
28
29 For your convenience, the GNU General Public L
30 in the package: See the file COPYING.
31
32 1. Usage
33 ~~~~~~~~
34 The drivers/usb/class/cdc-acm.c drivers works
35 adapters that conform to the Universal Serial
36 Abstract Control Model (USB CDC ACM) specifica
37
38 Many modems do, here is a list of those I know
39
40 - 3Com OfficeConnect 56k
41 - 3Com Voice FaxModem Pro
42 - 3Com Sportster
43 - MultiTech MultiModem 56k
44 - Zoom 2986L FaxModem
45 - Compaq 56k FaxModem
46 - ELSA Microlink 56k
47
48 I know of one ISDN TA that does work with the
49
50 - 3Com USR ISDN Pro TA
51
52 Some cell phones also connect via USB. I know
53
54 - SonyEricsson K800i
55
56 Unfortunately many modems and most ISDN TAs us
57 thus won't work with this drivers. Check for A
58
59 To use the modems you need these modules loade
60
61 usbcore.ko
62 uhci-hcd.ko ohci-hcd.ko or ehci-hcd.ko
63 cdc-acm.ko
64
65 After that, the modem[s] should be accessible.
66 minicom, ppp and mgetty with them.
67
68 2. Verifying that it works
69 ~~~~~~~~~~~~~~~~~~~~~~~~~~
70
71 The first step would be to check /sys/kernel/d
72 like this::
73
74 T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev
75 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso=
76 D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 M
77 P: Vendor=0000 ProdID=0000 Rev= 0.00
78 S: Product=USB UHCI Root Hub
79 S: SerialNumber=6800
80 C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
81 I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=
82 E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255m
83 T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev
84 D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 M
85 P: Vendor=04c1 ProdID=008f Rev= 2.07
86 S: Manufacturer=3Com Inc.
87 S: Product=3Com U.S. Robotics Pro ISDN TA
88 S: SerialNumber=UFT53A49BVT7
89 C: #Ifs= 1 Cfg#= 1 Atr=60 MxPwr= 0mA
90 I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=
91 E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl= 0m
92 E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl= 0m
93 E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128m
94 C:* #Ifs= 2 Cfg#= 2 Atr=60 MxPwr= 0mA
95 I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=
96 E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128m
97 I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=
98 E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl= 0m
99 E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl= 0m
100
101 The presence of these three lines (and the Cls
102 is important, it means it's an ACM device. The
103 driver is used for the device. If you see only
104 of luck, you have a device with vendor specifi
105
106 D: Ver= 1.00 Cls=02(comm.) Sub=00 Prot=00 M
107 I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=
108 I: If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=
109
110 In the system log you should see::
111
112 usb.c: USB new device connect, assigned devi
113 usb.c: kmalloc IF c7691fa0, numif 1
114 usb.c: kmalloc IF c7b5f3e0, numif 2
115 usb.c: skipped 4 class/vendor specific inter
116 usb.c: new device strings: Mfr=1, Product=2,
117 usb.c: USB device number 2 default language
118 Manufacturer: 3Com Inc.
119 Product: 3Com U.S. Robotics Pro ISDN TA
120 SerialNumber: UFT53A49BVT7
121 acm.c: probing config 1
122 acm.c: probing config 2
123 ttyACM0: USB ACM device
124 acm.c: acm_control_msg: rq: 0x22 val: 0x0 le
125 acm.c: acm_control_msg: rq: 0x20 val: 0x0 le
126 usb.c: acm driver claimed interface c7b5f3e0
127 usb.c: acm driver claimed interface c7b5f3f8
128 usb.c: acm driver claimed interface c7691fa0
129
130 If all this seems to be OK, fire up minicom an
131 device and try typing 'at'. If it responds wit
132 working.
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