/*
* hfa384x_docmd_wait
*
* Waits for availability of the Command register, then
* issues the given command. Then polls the Evstat register
* waiting for command completion.
* Arguments:
* hw device structure
* cmd Command in host order
* parm0 Parameter0 in host order
* parm1 Parameter1 in host order
* parm2 Parameter2 in host order
* Returns:
* 0 success
* >0 command indicated error, Status and Resp0-2 are
* in hw structure.
*/
static int hfa384x_docmd_wait( hfa384x_t *hw, uint16_t cmd, uint16_t parm0, uint16_t parm1, uint16_t parm2)
{
uint16_t reg = 0;
uint16_t counter = 0;
/* wait for the busy bit to clear */
counter = 0;
reg = hfa384x_getreg(hw, HFA384x_CMD);
while ( HFA384x_CMD_ISBUSY(reg) && (counter < 10) ) {
reg = hfa384x_getreg(hw, HFA384x_CMD);
counter++;
udelay(10);
}
if (HFA384x_CMD_ISBUSY(reg)) {
printf("hfa384x_cmd timeout(1), reg=0x%0hx.\n", reg);
return -ETIMEDOUT;
}
/* busy bit clear, write command */
hfa384x_setreg(hw, parm0, HFA384x_PARAM0);
hfa384x_setreg(hw, parm1, HFA384x_PARAM1);
hfa384x_setreg(hw, parm2, HFA384x_PARAM2);
hw->lastcmd = cmd;
hfa384x_setreg(hw, cmd, HFA384x_CMD);
/* Now wait for completion */
counter = 0;
reg = hfa384x_getreg(hw, HFA384x_EVSTAT);
/* Initialization is the problem. It takes about
100ms. "normal" commands are typically is about
200-400 us (I've never seen less than 200). Longer
is better so that we're not hammering the bus. */
while ( !HFA384x_EVSTAT_ISCMD(reg) && (counter < 5000)) {
reg = hfa384x_getreg(hw, HFA384x_EVSTAT);
counter++;
udelay(200);
}
if ( ! HFA384x_EVSTAT_ISCMD(reg) ) {
printf("hfa384x_cmd timeout(2), reg=0x%0hx.\n", reg);
return -ETIMEDOUT;
}
/* Read status and response */
hw->status = hfa384x_getreg(hw, HFA384x_STATUS);
hw->resp0 = hfa384x_getreg(hw, HFA384x_RESP0);
hw->resp1 = hfa384x_getreg(hw, HFA384x_RESP1);
hw->resp2 = hfa384x_getreg(hw, HFA384x_RESP2);
hfa384x_setreg(hw, HFA384x_EVACK_CMD, HFA384x_EVACK);
return HFA384x_STATUS_RESULT_GET(hw->status);
}
int hfa384x_corereset(hfa384x_t *hw, int holdtime, int settletime, int genesis)
{
int result = 0;
unsigned long timeout;
UINT16 reg;
DBFENTER;
/* Assert reset and wait awhile
* (note: these delays are _really_ long, but they appear to be
* necessary.)
*/
hfa384x_setreg(hw, 0xc5, HFA384x_PCICOR);
timeout = jiffies + HZ/4;
while(time_before(jiffies, timeout)) udelay(5);
if (genesis) {
hfa384x_setreg(hw, genesis, HFA384x_PCIHCR);
timeout = jiffies + HZ/4;
while(time_before(jiffies, timeout)) udelay(5);
}
/* Clear the reset and wait some more
*/
hfa384x_setreg(hw, 0x45, HFA384x_PCICOR);
timeout = jiffies + HZ/2;
while(time_before(jiffies, timeout)) udelay(5);
/* Wait for f/w to complete initialization (CMD:BUSY == 0)
*/
timeout = jiffies + 2*HZ;
reg = hfa384x_getreg(hw, HFA384x_CMD);
while ( HFA384x_CMD_ISBUSY(reg) && time_before( jiffies, timeout) ) {
reg = hfa384x_getreg(hw, HFA384x_CMD);
udelay(10);
}
if (HFA384x_CMD_ISBUSY(reg)) {
WLAN_LOG_WARNING("corereset: Timed out waiting for cmd register.\n");
result=1;
}
DBFEXIT;
return result;
}
