Hello, I wrote a char driver to interface with an SPI chip which will be connected (via UART) to a cell modem. The SPI to UART chip works pretty well so far with custom software (I can send SMS messages for intance) but I'm having trouble with pppd (version 2.4.4) on the Gumstix distro. My question is what are the ioctl commands (including the expected responses) that I need to support in my driver. I have included what I think are some of the ioctl commands into the driver and when they're called I have the driver print the variable name as defined in ioctls.h. The driver returns 0 unless it gets TCGETS at which point it returns the baud rate (B115200). WRITE! -- pppd is writing to the driver READ! -- pppd is reading from the driver INTERRUPT --- New data has arrived from the modem to the SPI Here's the driver and chat print out of when PPPd tries to connect to the internet via the SPI : Dec 31 16:18:10 gumstix user.info kernel: Inserting the spi_uart module. Dec 31 16:18:23 gumstix user.info kernel: PPP generic driver version 2.4.2 Dec 31 16:18:23 gumstix daemon.notice pppd[404]: pppd 2.4.4 started by root, uid 0 Dec 31 16:18:23 gumstix user.info kernel: Device Open: 1 Dec 31 16:18:23 gumstix user.info kernel: The minor number: 0 Dec 31 16:18:23 gumstix user.info kernel: The device has been opened. Dec 31 16:18:23 gumstix user.info kernel: TIOCMBIS Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix user.info kernel: TCSETSF Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix user.info kernel: TCSETS Dec 31 16:18:23 gumstix user.info kernel: TCGETS Dec 31 16:18:23 gumstix local2.info chat[406]: send (AT^M) Dec 31 16:18:23 gumstix user.info kernel: WRITE! Dec 31 16:18:23 gumstix user.info kernel: WRITE! Dec 31 16:18:23 gumstix user.info kernel: INTERRUPT Dec 31 16:18:23 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: Interrrupt from somewhere else. Dec 31 16:18:24 gumstix user.warn kernel: Dec 31 16:18:24 gumstix user.warn kernel: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Dec 31 16:18:24 gumstix user.warn kernel: 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 Dec 31 16:18:24 gumstix user.warn kernel: Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: Interrrupt from somewhere else. Dec 31 16:18:24 gumstix user.warn kernel: Dec 31 16:18:24 gumstix user.warn kernel: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Dec 31 16:18:24 gumstix user.warn kernel: 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 Dec 31 16:18:24 gumstix user.warn kernel: Dec 31 16:18:24 gumstix local2.info chat[406]: expect (OK) Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix local2.info chat[406]: AT^M^M Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix user.info kernel: READ! Dec 31 16:18:24 gumstix local2.info chat[406]: OK Dec 31 16:18:24 gumstix local2.info chat[406]: -- got it Dec 31 16:18:24 gumstix local2.info chat[406]: send (ATD*99***1#^M) Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: Interrrupt from somewhere else. Dec 31 16:18:24 gumstix user.warn kernel: Dec 31 16:18:24 gumstix user.warn kernel: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Dec 31 16:18:24 gumstix user.warn kernel: 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 Dec 31 16:18:24 gumstix user.warn kernel: Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:24 gumstix user.info kernel: WRITE! Dec 31 16:18:24 gumstix user.info kernel: INTERRUPT Dec 31 16:18:25 gumstix user.info kernel: INTERRUPT Dec 31 16:18:25 gumstix user.info kernel: INTERRUPT Dec 31 16:18:25 gumstix user.info kernel: Interrrupt from somewhere else. Dec 31 16:18:25 gumstix user.warn kernel: Dec 31 16:18:25 gumstix user.warn kernel: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Dec 31 16:18:25 gumstix user.warn kernel: 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 Dec 31 16:18:25 gumstix user.warn kernel: Dec 31 16:18:24 gumstix local2.info chat[406]: expect (CONNECT) Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix local2.info chat[406]: ^M Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix local2.info chat[406]: ATD*99***1#^M^M Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix user.info kernel: READ! Dec 31 16:18:25 gumstix local2.info chat[406]: CONNECT Dec 31 16:18:25 gumstix local2.info chat[406]: -- got it Dec 31 16:18:25 gumstix local2.info chat[406]: send (dc^M) Dec 31 16:18:25 gumstix user.info kernel: WRITE! Dec 31 16:18:25 gumstix user.info kernel: WRITE! Dec 31 16:18:25 gumstix user.info kernel: WRITE! Dec 31 16:18:25 gumstix user.info kernel: TCSETS Dec 31 16:18:25 gumstix user.info kernel: TCGETS Dec 31 16:18:25 gumstix daemon.info pppd[404]: Serial connection established. Dec 31 16:18:25 gumstix user.info kernel: TIOCMBIS Dec 31 16:18:25 gumstix user.info kernel: TCGETS Dec 31 16:18:25 gumstix user.info kernel: TCSETSF Dec 31 16:18:25 gumstix user.info kernel: TIOCEXCL Dec 31 16:18:25 gumstix user.info kernel: TIOCSETD Dec 31 16:18:25 gumstix user.info kernel: I don't know what the hell you just sent... 0x80047437 Dec 31 16:18:25 gumstix daemon.err pppd[404]: Couldn't attach to channel 0: No such device or address Dec 31 16:18:25 gumstix user.info kernel: TIOCSETD Dec 31 16:18:25 gumstix user.info kernel: TCSETSF Dec 31 16:18:25 gumstix user.info kernel: The device has been closed. Dec 31 16:18:25 gumstix daemon.info pppd[404]: Exit. My pppd options are: usepeerdns defaultroute noauth local hide-password noipdefault lcp-echo-interval 30 lcp-echo-failure 4 Thanks for your help! Rich -- View this message in context: http://www.nabble.com/PPPd-ioctl%2C-please-help%21-tp17153241p17153241.html Sent from the linux-ppp mailing list archive at Nabble.com. -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
