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Date:      Sun, 20 Sep 2009 21:44:25 -0400
From:      Pierre-Luc Drouin <pldrouin@pldrouin.net>
To:        freebsd-usb@freebsd.org, hselasky@c2i.net
Subject:   Re: usb/138659: uftdi driver broken in RELENG_8/CURRENT
Message-ID:  <4AB6DA79.7050209@pldrouin.net>
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Hi,

I am also having troubles with the uftdi driver on 8.0-BETA4.
I am trying to use a fan controller (mCubed bigNG) that uses a FT232BL chip and it does not seem to be responding on FreeBSD 8.0 while the same code works perfectly on Linux (I have not tried the code on RELENG_7 yet but I could install it if necessary).

Here is the very simple code I am using for testing:
#include <termios.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>

int main();

#define DEV "/dev/ttyU0"

#define TBAN_SER_SOURCE1        0x05 /* Primary source */
#define TBAN_SER_SOURCE2        0x06 /* Alternative source (miniNG...) */

#define TBAN_SER_REQUEST        0x36

int main()
{
  int fd;
  int result;
  struct termios oldtio, newtio;
  unsigned char buf[285];

  printf("Opening device\n");
  fd=open(DEV, O_RDWR | O_NOCTTY);

  if(fd<0) {
    perror(DEV);
    return 1;
  }

  result=tcgetattr(fd,&oldtio);
  if(result<0) {
    perror("tcgetattr");
    return 1;
  }

  memcpy(&newtio,&oldtio,sizeof(struct termios));
  newtio.c_cflag = B19200
    | CRTSCTS
    | CS8
    | CREAD;
  newtio.c_iflag     = IGNPAR;
  newtio.c_oflag     = 0;
  newtio.c_lflag     = 0;
  newtio.c_cc[VMIN]  = 1;
  newtio.c_cc[VTIME] = 0;

  result=tcflush(fd, TCIFLUSH);
  if(result<0) {
    perror("tcflush");
    return 1;
  }

  result=tcsetattr(fd,TCSANOW,&newtio);
  if(result<0) {
    perror("tcsetattr");
    return 1;
  }

  sleep(1);

  printf("Performing initial query\n");
  buf[0]=TBAN_SER_SOURCE1;
  buf[1]=TBAN_SER_REQUEST;

  printf("Requesting status\n");
  result=write(fd,buf,2);
  if(result<0) {
    perror("write");
    return 1;
  }

  sleep(1);

  printf("Reading status\n");
  result=read(fd,buf,32);
  if(result<0) {
    perror("read");
    return 1;
  }

  result=tcsetattr(fd,TCSANOW,&oldtio);
  if(result<0) {
    perror("tcsetattr");
    return 1;
  }

  result=close(fd);
  if(result<0) {
    perror("close");
    return 1;
  }
  return 0;
}

It hangs while reading independently of the number of bits I am reading.

Here is the output from dmesg when I load the uftdi module:
Sep 20 21:31:31 ldaemon kernel: uftdi0: <USB - Serial> on usbus6
Sep 20 21:31:31 ldaemon kernel: ucom_attach_tty:317: tp = 0xffffff001f12b400, unit = 0
Sep 20 21:31:31 ldaemon kernel: ucom_attach_tty:346: ttycreate: U0
Sep 20 21:31:34 ldaemon root: Unknown USB device: vendor 0x051d product 0x0002 bus uhub0

Here is the output in /var/log/messages when I enable the debug output for ucom and uftdi:
Sep 20 21:33:30 ldaemon kernel: ucom_open:554: tp = 0xffffff001f12b400
Sep 20 21:33:30 ldaemon kernel: ucom_dtr:827: onoff = 1
Sep 20 21:33:30 ldaemon kernel: ucom_line_state:799: on=0x01, off=0x00
Sep 20 21:33:30 ldaemon kernel: ucom_rts:838: onoff = 1
Sep 20 21:33:30 ldaemon kernel: ucom_line_state:799: on=0x02, off=0x00
Sep 20 21:33:30 ldaemon kernel: ucom_break:816: onoff = 0
Sep 20 21:33:30 ldaemon kernel: ucom_line_state:799: on=0x00, off=0x04
Sep 20 21:33:30 ldaemon kernel: ucom_status_change:901:
Sep 20 21:33:30 ldaemon kernel: ucom_param:950: sc = 0xffffff001f12ac58
Sep 20 21:33:30 ldaemon kernel: uftdi_pre_param:653:
Sep 20 21:33:30 ldaemon kernel: ucom_dtr:827: onoff = 1
Sep 20 21:33:30 ldaemon kernel: ucom_line_state:799: on=0x01, off=0x00
Sep 20 21:33:30 ldaemon kernel: ucom_rts:838: onoff = 1
Sep 20 21:33:30 ldaemon kernel: ucom_line_state:799: on=0x02, off=0x00
Sep 20 21:33:30 ldaemon kernel: ucom_cfg_open:520:
Sep 20 21:33:30 ldaemon kernel: uftdi_cfg_open:354:
Sep 20 21:33:30 ldaemon kernel: uftdi_read_callback:459: status change msr=0xf0 (0x00) lsr=0x60 (0x00)
Sep 20 21:33:30 ldaemon kernel: ucom_status_change:901:
Sep 20 21:33:30 ldaemon kernel: uftdi_cfg_get_status:705: msr=0xf0 lsr=0x60
Sep 20 21:33:30 ldaemon kernel: ucom_cfg_status_change:887: DCD changed to 1
Sep 20 21:33:30 ldaemon kernel: uftdi_cfg_param:672:
Sep 20 21:33:30 ldaemon kernel: ucom_ioctl:653: cmd = 0x402c7413
Sep 20 21:33:30 ldaemon kernel: ucom_ioctl:653: cmd = 0x80047410
Sep 20 21:33:30 ldaemon kernel: ucom_ioctl:653: cmd = 0x802c7414
Sep 20 21:33:30 ldaemon kernel: ucom_param:950: sc = 0xffffff001f12ac58
Sep 20 21:33:30 ldaemon kernel: uftdi_pre_param:653:
Sep 20 21:33:30 ldaemon kernel: uftdi_cfg_get_status:705: msr=0xf0 lsr=0x60
Sep 20 21:33:30 ldaemon kernel: uftdi_cfg_param:672:
Sep 20 21:33:30 ldaemon kernel: ucom_get_data:1064: cnt=0
Sep 20 21:33:31 ldaemon kernel: ucom_ioctl:653: cmd = 0x80047410
Sep 20 21:33:32 ldaemon kernel: ucom_outwakeup:1009: sc = 0xffffff001f12ac58
Sep 20 21:33:32 ldaemon kernel: ucom_get_data:1064: cnt=2
Sep 20 21:33:32 ldaemon kernel: ucom_get_data:1064: cnt=0

I really need to get this working so I am ready to test things as much as I can...

Thanks a lot!
Pierre-Luc Drouin

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