modify PDA to control txpower

[William Tai]

----- Original Message ----- 
From: "Jouni Malinen" <jkmaline at cc.hut.fi>
To: <hostap at shmoo.com>
Sent: Monday, August 04, 2003 7:31 PM
Subject: Re: modify PDA to control txpower


> On Mon, Aug 04, 2003 at 11:00:52AM -0700, William Tai wrote:
>
> >     I am trying modify PDR 0x0300 and PDR 0x0301 to control txpower by
> > calling prism2_download_volatile( ).
>
> You are trying to modify PDA by using _volatile_ download?? PDA is a
> block in flash.. In addition, please note that changing the PDA values
> does not really change anything unless you download a new image after
> that. In many cases, it would probably be easier to just modify
> prism2_srec to overrite card PDA with something else when plugging PDRs.
>

I add two lines of the codes in prism2_read_pda( ) and then it works.


/*static*/ u8 * prism2_read_pda(struct device *dev)
{
 u8 *buf;
 int res, i, found = 0;
#define NUM_PDA_ADDRS 3
 unsigned int pda_addr[NUM_PDA_ADDRS] = {
  0x7f0000 /* others than HFA3841 */,
  0x3f0000 /* HFA3841 */,
  0x390000 /* apparently used in older cards */
 };
 u16 setpoint[14]={0x00c0, 0x00c0, 0x00c0, 0x00c0, 0x00c0, 0x00c0, 0x00c0,
0x00c0, 0x00c0, 0x00c0, 0x00c0, 0x00c0, 0x00c0, 0x00c0};

// buf = (u8 *) kmalloc(PRISM2_PDA_SIZE, GFP_KERNEL);
 buf = (u8 *) malloc(PRISM2_PDA_SIZE);
 if (buf == NULL)
  return NULL;

 /* Note: wlan card should be in initial state (just after init cmd)
  * and no other operations should be performed concurrently. */

 prism2_enable_aux_port(dev, 1);

 for (i = 0; i < NUM_PDA_ADDRS; i++) {
  //printk(KERN_DEBUG "%s: trying to read PDA from 0x%08x",
  //       dev->name, pda_addr[i]);
  res = hfa384x_from_aux(dev, pda_addr[i], PRISM2_PDA_SIZE, buf);
//  if (res)
//   continue;
  if (res == 0 && prism2_pda_ok(buf)) {
   //printk(": OK\n");
   found = 1;
   break;
  } else {
   //printk(": failed\n");
  }
 }
#if 0
 res = hfa384x_to_aux(dev, 0x7f01be, 28, (void *)setpoint);  <----new added
  res = hfa384x_from_aux(dev, 0x7f01be, 28, buf);                <---- 
newadded
#endif
 prism2_enable_aux_port(dev, 0);

 if (!found) {
  kfree(buf);
  buf = NULL;
 }

 return buf;
}



> > However I do not know the param0 and param1.
> > I know the starting addr of PDA is 0x7f0000.
>
> You cannot load PDA that way with volatile download.
>
> -- 
> Jouni Malinen                                            PGP id EFC895FA
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