Date: Sun, 30 Jan 2011 11:32:01 +1100 From: Peter Jeremy <peterjeremy@acm.org> To: freebsd-usb@freebsd.org Subject: ACM interface on TI Launchpad Message-ID: <20110130003201.GA99514@server.vk2pj.dyndns.org>
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I recently acquired a TI LaunchPad[1] and want to use FreeBSD as my
development enviroment (for anyone else who is interested in this, at
some stage I intend to post my experiences with the various ports to
-ports or feel free to contact me off-list). It provides a FET430UIF
USB interface to the host computer and some googling shows that this
is a Communication Device Class (CDC), Abstract Control Model (ACM)
sub-class which is supported in Linux via the cdc_acm driver.
On FreeBSD 8.1, umodem(4) reports:
ugen0.2: <Texas Instruments> at usbus0
umodem0: <MSP430 Application UART> on usbus0
umodem0: data interface 0, has no CM over data, has no break
and creates /dev/ttyU0 (and friends) but mspdebug reports that it
cannot access the UIF (so it is presumably talking to the device
UART, rather than the control interface).
I have tried adding the device id to usbdevs and
{USB_VPI(USB_VENDOR_TI, USB_PRODUCT_TI_FET430UIF, 1)},
to sys/dev/usb/serial/umodem.c:umodem_devs[] and this changes the
probe to:
ugen4.2: <Texas Instruments> at usbus4
umodem0: <MSP430 Application UART> on usbus4
umodem0: data interface 0, has no CM over data, has no break
umodem1: <MSP430 Debug-Interface> on usbus4
umodem1: Missing descriptor. Assuming data interface is next.
umodem1: data interface 2, has CM over data, has no break
umodem1: no data interface
device_attach: umodem1 attach returned 6
umodem1: <MSP430 Debug-Interface> on usbus4
umodem1: Missing descriptor. Assuming data interface is next.
umodem1: data interface 2, has CM over data, has no break
umodem1: no data interface
device_attach: umodem1 attach returned 6
but there's no change to the accessibility.
Looking at the Linux driver sources, there are no quirks for this on
Linux. How do I go about getting umodem(4) (or some other driver) to
detect the debug interfaces on FreeBSD?
The output from "usbconfig dump_device_desc" is:
ugen4.2: <Texas Instruments MSP-FET430UIF Texas Instruments> at usbus4, cfg=
=3D0 md=3DHOST spd=3DFULL (12Mbps) pwr=3DON
bLength =3D 0x0012=20
bDescriptorType =3D 0x0001=20
bcdUSB =3D 0x0110=20
bDeviceClass =3D 0x0000=20
bDeviceSubClass =3D 0x0000=20
bDeviceProtocol =3D 0x0000=20
bMaxPacketSize0 =3D 0x0008=20
idVendor =3D 0x0451=20
idProduct =3D 0xf432=20
bcdDevice =3D 0x0100=20
iManufacturer =3D 0x0001 <Texas Instruments>
iProduct =3D 0x0002 <Texas Instruments MSP-FET430UIF>
iSerialNumber =3D 0x0003 <1EFF426C50172852>
bNumConfigurations =3D 0x0001=20
The output from "usbconfig dump_curr_config_desc" is:
ugen4.2: <Texas Instruments MSP-FET430UIF Texas Instruments> at usbus4, cfg=
=3D0 md=3DHOST spd=3DFULL (12Mbps) pwr=3DON
Configuration index 0
bLength =3D 0x0009=20
bDescriptorType =3D 0x0002=20
wTotalLength =3D 0x0055=20
bNumInterfaces =3D 0x0002=20
bConfigurationValue =3D 0x0001=20
iConfiguration =3D 0x0000 <no string>
bmAttributes =3D 0x0080=20
bMaxPower =3D 0x0032=20
Interface 0
bLength =3D 0x0009=20
bDescriptorType =3D 0x0004=20
bInterfaceNumber =3D 0x0000=20
bAlternateSetting =3D 0x0000=20
bNumEndpoints =3D 0x0003=20
bInterfaceClass =3D 0x0002=20
bInterfaceSubClass =3D 0x0002=20
bInterfaceProtocol =3D 0x0001=20
iInterface =3D 0x0005 <MSP430 Application UART>
Additional Descriptor
bLength =3D 0x05
bDescriptorType =3D 0x24
bDescriptorSubType =3D 0x00
RAW dump:=20
0x00 | 0x05, 0x24, 0x00, 0x10, 0x01
Additional Descriptor
bLength =3D 0x05
bDescriptorType =3D 0x24
bDescriptorSubType =3D 0x01
RAW dump:=20
0x00 | 0x05, 0x24, 0x01, 0x00, 0x00
Additional Descriptor
bLength =3D 0x04
bDescriptorType =3D 0x24
bDescriptorSubType =3D 0x02
RAW dump:=20
0x00 | 0x04, 0x24, 0x02, 0x02
Endpoint 0
bLength =3D 0x0007=20
bDescriptorType =3D 0x0005=20
bEndpointAddress =3D 0x0082 <IN>
bmAttributes =3D 0x0003 <INTERRUPT>
wMaxPacketSize =3D 0x0040=20
bInterval =3D 0x00ff=20
bRefresh =3D 0x0000=20
bSynchAddress =3D 0x0000=20
Endpoint 1
bLength =3D 0x0007=20
bDescriptorType =3D 0x0005=20
bEndpointAddress =3D 0x0003 <OUT>
bmAttributes =3D 0x0002 <BULK>
wMaxPacketSize =3D 0x0040=20
bInterval =3D 0x00ff=20
bRefresh =3D 0x0000=20
bSynchAddress =3D 0x0000=20
Endpoint 2
bLength =3D 0x0007=20
bDescriptorType =3D 0x0005=20
bEndpointAddress =3D 0x0083 <IN>
bmAttributes =3D 0x0002 <BULK>
wMaxPacketSize =3D 0x0040=20
bInterval =3D 0x00ff=20
bRefresh =3D 0x0000=20
bSynchAddress =3D 0x0000=20
Interface 1
bLength =3D 0x0009=20
bDescriptorType =3D 0x0004=20
bInterfaceNumber =3D 0x0001=20
bAlternateSetting =3D 0x0000=20
bNumEndpoints =3D 0x0002=20
bInterfaceClass =3D 0x0003=20
bInterfaceSubClass =3D 0x0000=20
bInterfaceProtocol =3D 0x0000=20
iInterface =3D 0x0004 <MSP430 Debug-Interface>
Additional Descriptor
bLength =3D 0x09
bDescriptorType =3D 0x21
bDescriptorSubType =3D 0x01
RAW dump:=20
0x00 | 0x09, 0x21, 0x01, 0x01, 0x00, 0x01, 0x22, 0xb6,=20
0x08 | 0x02
Endpoint 0
bLength =3D 0x0007=20
bDescriptorType =3D 0x0005=20
bEndpointAddress =3D 0x0081 <IN>
bmAttributes =3D 0x0003 <INTERRUPT>
wMaxPacketSize =3D 0x0040=20
bInterval =3D 0x0001=20
bRefresh =3D 0x0000=20
bSynchAddress =3D 0x0000=20
Endpoint 1
bLength =3D 0x0007=20
bDescriptorType =3D 0x0005=20
bEndpointAddress =3D 0x0001 <OUT>
bmAttributes =3D 0x0003 <INTERRUPT>
wMaxPacketSize =3D 0x0040=20
bInterval =3D 0x0001=20
bRefresh =3D 0x0000=20
bSynchAddress =3D 0x0000=20
[1] http://processors.wiki.ti.com/index.php/MSP430_LaunchPad_%28MSP-EXP430G=
2%29
--=20
Peter Jeremy
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