Re: [ts-7000] unable to access PLD registers on ts-gsm1 modem

[Jim Jackson <>]

On Tue, 22 Mar 2011, jmahler_tx wrote:

> I am trying to access the PLD registers on a ts-gsm1 modem from a ts-7260 
> board in a C program, but I cannot find the correct address to map the 
> registers to. I have attempted using mmap() to map the following 
> addresses: 0x11800000, 0x11A00000, 0x11C00000, 0x11E00000. I have 
> attempted the following offsets for each of these starting addresses: 
> 0x000, 0x140, 0x190, 0x3E8. The modem jumpers are configured to COM3, and 
> jumpers 4 and 5 are off. If anybody is familiar with the base and offset 
> addresses needed to access these PLD registers, help would be greatly 
> appreciated.

I've done this. I left the board as configured. JP4 on

Here are a set of C functions for accessing some of the registers...

/* Modem power control functions.....
 *
 * This is in PC104 address space - 0x11e00000  for 8 bit IO
 *
 * modempwrinit()  set up register pointers etc
 *  0x140  Board ID  always 0x09
 *  0x141  PLD version 1st read -> 0x06, 2nd -> 0x07, 3rd -> 0x08,
 *                          4th -> Version number
 *  0x142  Jumpers Bit 0 - JP1 com/io decode 1 on; 0 off;
 *                      Bit 1 - JP2  ditto
 *                      Bit 2 - JP3  ditto
 *                      Bit 3 - JP4 PLD base address setting
 *  0x143  Status  Bit 0 - Modem Power Control (R/W)   
 *                      Bit 1 - Modem Power Status  (RO) 
 *                      Bit 2 - LED Status
 *                      Bit 3 - JP5 status 1 on; 0 off;
 *  0x148  Baud    Bit 0 = 1 baud clock is doubled (R/W) allows 230 KBaud
 */

#define PC104_8BIT_IO   (0x11e00000)
#define PC104_16BIT_IO  (0x21e00000)
#define PC104_8BIT_MEM  (0x11A00000)
#define PC104_16BIT_MEM (0x21A00000)

char *gsmcomiostr[]={ "0x3f8 COM1", "0x2f8 COM2", "0x3e8 COM3", "0x2e8 
COM4",
                      "0x3a8 COM5", "0x2a8 COM6", "0x3a0 COM7", "0x2a0 
COM8" };

volatile unsigned char *pc104base=NULL;
volatile unsigned char *gsmid;
volatile unsigned char *gsmjp;
volatile unsigned char *gsmstat;
volatile unsigned char *gsmbaud;

int gsmpwrinit() {
  int iofd;

  iofd=open("/dev/mem", O_RDWR|O_SYNC);
  if (iofd<0) { return(-1); }
  pc104base=(unsigned char *)mmap(0, getpagesize(), PROT_READ|PROT_WRITE,
                                  MAP_SHARED, iofd, PC104_8BIT_IO);
  if (pc104base==MAP_FAILED) { return(-1); }
  gsmid=pc104base+0x140;
  if (*gsmid != 0x09) { errno=ENODEV ; return(-1); }
  gsmjp=pc104base+0x142;
  gsmstat=pc104base+0x143;
  gsmbaud=pc104base+0x148;
  return(0);
}

int gsmpwron() {
  if (pc104base==NULL) { errno=ENODEV ; return(-1); }
  *gsmstat=(0x01);         /* set power on       */
  usleep(4000000);         /* wait for power change to happen */
  return 0;
}

int gsmpwroff() {
  if (pc104base==NULL) { errno=ENODEV ; return(-1); }
  *gsmstat=0;              /* set power off     */
  usleep(4000000);         /* wait for power change to happen */
  return 0;
}

int gsmgetjp() {
  if (pc104base==NULL) { errno=ENODEV ; return(-1); }
  return( *gsmjp & 0x0f );
}

int gsmgetstat() {
  if (pc104base==NULL) { errno=ENODEV ; return(-1); }
  return( *gsmstat & 0x0f );
}

int gsmgetbaud() {
  if (pc104base==NULL) { errno=ENODEV ; return(-1); }
  return( *gsmbaud & 0x01 );
}



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