On 7/6/06, lee nookx <lnookx@xxxxxxxxxxxxxx> wrote:
Hi, I am trying to debug a serial port problem I am having with kernel 2.4.19, and was hoping someone might point me at some useful documentation. I am running a ipaq under familiar linux and am trying to get a navman gps sleeve to work. However, it seems as though the serial port in the sleeve is not being detected properly. My dmesg output looks like this: navman_gps_cf_probe_sleeve: Navman GPS/CF Sleeve serial_port=0 serial_ioaddr=cabe0000 register_serial: port=cabe0000 irq=45 flags=1000040 Testing ttyS0 (0xcabe0000, 0x0000)... serial in: MCR (4)=52 ? LOOP RTS serial in: LCR (3)=1c EPS PEN STB serial: Check to see if UART is there serial out: LCR (3)=bf DLAB STCP EPS PEN STB WLS1 WLS0 serial out: FCR (2)=00 serial out: LCR (3)=00 serial out: FCR (2)=01 EFIFO serial in: IIR (2)=01 INTF serial: Read scratch = 0x00 serial out: LCR (3)=1c EPS PEN STB serial in: SCR (7)=08 serial out: SCR (7)=a5 serial in: SCR (7)=07 serial out: SCR (7)=5a serial in: SCR (7)=07 serial out: SCR (7)=08 serial: status1: 0x07 status2: 0x07 serial out: MCR (4)=52 ? LOOP RTS serial out: FCR (2)=07 CLXMIT CLRCVR EFIFO serial out: FCR (2)=00 serial in: RCVR (0)=f0 serial out: IER (1)=00 *** port: cabe00000000, iomem_base=0xcabe0000 ttyS00 at port 0xcabe0000 (irq = 45) is a 8250
Aren't we supposed to use /dev/ttyS0 instead of /dev/tts/0
navman_gps_cf_probe_sleeve: Serial line: 0 navman_gps_cf_probe_sleeve: NavMan GPS Sleeve initialisation complete. Which seems to imply that the device is up and running. However, when I try and cat /dev/tts/0 I just get nothing (no garbage, just does nothing...). The sleeve works under earlier versions of the familiar kernel (2.4.18), but I can't see an obvious difference in the initialisation codes between the two kernel versions. Is there anyone here who would either be able to help me debug the problem, or at least point me at some good low-level serial documents that might assist?
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