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* Patch by Steven Scholz, 18 Oct 2003:

Browse Source 
Fix AT91RM9200 ethernet driver

* Patch by Nye Liu, 17 Oct 2003:
  Fix typo in include/mpc8xx.h

* Patch by Richard Woodruff, 16 Oct 03:
  Fixes for cpu/arm925/interrupt.c
  - Initialize timestamp & lastdec vars.
  - fix timestamp overflows.
  - fix lastdec overflow.
  - smarter normalization to allow udelay() below 1ms to work.

* Patch by Scott McNutt, 16 Oct
  add networking support for the Altera Nios Development Kit,
  Cyclone Edition (DK-1C20)

* Patch by Jon Diekema, 14 Oct 2003:
  add hint about doc/README.silent to README file
This commit is contained in:
wdenk
2003-10-19 23:22:11 +00:00
parent d7281f4109
commit a3ad8e26a4
10 changed files with 118 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
cpu/arm925t/interrupts.c
View File

@@ -185,9 +185,14 @@ int interrupt_init (void)
{
int32_t val;
/* Start the decrementer ticking down from 0xffffffff */
*((int32_t *) (CFG_TIMERBASE + LOAD_TIM)) = TIMER_LOAD_VAL;
val = MPUTIM_ST | MPUTIM_AR | MPUTIM_CLOCK_ENABLE | (CFG_PVT << MPUTIM_PTV_BIT);
*((int32_t *) (CFG_TIMERBASE + CNTL_TIMER)) = val;
/* init the timestamp and lastdec value */
reset_timer_masked();
return (0);
}
@@ -210,7 +215,7 @@ void set_timer (ulong t)
timestamp = t;
}
/* very rough timer... */
/* delay x useconds AND perserve advance timstamp value */
void udelay (unsigned long usec)
{
#ifdef CONFIG_INNOVATOROMAP1510
@@ -220,16 +225,24 @@ void udelay (unsigned long usec)
for (i = time_remaining; i > 0; i--) {
}
#else
ulong tmo, tmp;
ulong tmo;
if(usec >= 1000){ /* if "big" number, spread normalization to seconds */
tmo = usec / 1000; /* start to normalize for usec to ticks per sec */
tmo *= CFG_HZ; /* find number of "ticks" to wait to achieve target */
tmo /= 1000; /* finish normalize. */
}else{ /* else small number, don't kill it prior to HZ multiply */
tmo = usec * CFG_HZ;
tmo /= (1000*1000);
}
tmo = usec / 1000;
tmo *= CFG_HZ;
tmo /= 1000;
tmp = get_timer (0); /* get current timestamp */
if( (tmo + tmp) < tmp ) /* if setting this fordward will roll time stamp */
reset_timer_masked (); /* reset "advancing" timestamp to 0, set lastdec value */
else
tmo += tmp; /* else, set advancing stamp wake up time */
tmo += get_timer (0);
while (get_timer_masked () < tmo)
while (get_timer_masked () < tmo)/* loop till event */
/*NOP*/;
#endif
}
@@ -237,19 +250,23 @@ void udelay (unsigned long usec)
void reset_timer_masked (void)
{
/* reset time */
lastdec = READ_TIMER;
timestamp = 0;
lastdec = READ_TIMER; /* capure current decrementer value time */
timestamp = 0; /* start "advancing" time stamp from 0 */
}
ulong get_timer_masked (void)
{
ulong now = READ_TIMER; /* current tick value */
ulong now = READ_TIMER; /* current tick value */
if (lastdec >= now) { /* did I roll (rem decrementer) */
if (lastdec >= now) { /* normal mode (non roll) */
/* normal mode */
timestamp += lastdec - now; /* record amount of time since last check */
} else {
/* we have an overflow ... */
timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */
} else { /* we have overflow of the count down timer */
/* nts = ts + ld + (TLV - now)
* ts=old stamp, ld=time that passed before passing through -1
* (TLV-now) amount of time after passing though -1
* nts = new "advancing time stamp"...it could also roll and cause problems.
*/
timestamp += lastdec + TIMER_LOAD_VAL - now;
}
lastdec = now;
@@ -257,6 +274,7 @@ ulong get_timer_masked (void)
return timestamp;
}
/* waits specified delay value and resets timestamp */
void udelay_masked (unsigned long usec)
{
#ifdef CONFIG_INNOVATOROMAP1510
@@ -265,15 +283,20 @@ void udelay_masked (unsigned long usec)
for (i=time_remaining; i>0; i--) { }
#else
ulong tmo;
ulong tmo, tmp;
tmo = usec / 1000;
tmo *= CFG_HZ;
tmo /= 1000;
if(usec >= 1000){ /* if "big" number, spread normalization to seconds */
tmo = usec / 1000; /* start to normalize for usec to ticks per sec */
tmo *= CFG_HZ; /* find number of "ticks" to wait to achieve target */
tmo /= 1000; /* finish normalize. */
}else{ /* else small number, don't kill it prior to HZ multiply */
tmo = usec * CFG_HZ;
tmo /= (1000*1000);
}
reset_timer_masked ();
reset_timer_masked (); /* set "advancing" timestamp to 0, set lastdec vaule */
while (get_timer_masked () < tmo)
while (get_timer_masked () < tmo) /* wait for time stamp to overtake tick number.*/
/*NOP*/;
#endif
}
@@ -292,7 +315,7 @@ unsigned long long get_ticks(void)
* On ARM it returns the number of timer ticks per second.
*/
ulong get_tbclk (void)
{ /* poor timer, may need to improve especiall for bootp. */
{
ulong tbclk;
tbclk = CFG_HZ;

6
cpu/at91rm9200/at91rm9200_ether.c
View File

@@ -334,12 +334,12 @@ static UCHAR at91rm9200_EmacReadPhy (AT91PS_EMAC p_mac,
* TRUE - if data read successfully
*/
static UCHAR at91rm9200_EmacWritePhy (AT91PS_EMAC p_mac,
unsigned char RegisterAddress,
unsigned short *pOutput)
unsigned char RegisterAddress,
unsigned short *pOutput)
{
p_mac->EMAC_MAN = (AT91C_EMAC_HIGH & ~AT91C_EMAC_LOW) |
AT91C_EMAC_CODE_802_3 | AT91C_EMAC_RW_W |
(RegisterAddress << 18);
(RegisterAddress << 18) | *pOutput;
udelay (10000);