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milkymist-sysctl: fix timers

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Prevent timers from firing right after starting.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Michael Walle 2011-04-13 00:29:35 +02:00 committed by Edgar E. Iglesias
parent c07050ddb9
commit f3172a0e2e
1 changed files with 7 additions and 19 deletions
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26
hw/milkymist-sysctl.c
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@ -140,24 +140,8 @@ static void sysctl_write(void *opaque, target_phys_addr_t addr, uint32_t value)
case R_GPIO_OUT: case R_GPIO_OUT:
case R_GPIO_INTEN: case R_GPIO_INTEN:
case R_TIMER0_COUNTER: case R_TIMER0_COUNTER:
if (value > s->regs[R_TIMER0_COUNTER]) {
value = s->regs[R_TIMER0_COUNTER];
error_report("milkymist_sysctl: timer0: trying to write a "
"value greater than the limit. Clipping.");
}
/* milkymist timer counts up */
value = s->regs[R_TIMER0_COUNTER] - value;
ptimer_set_count(s->ptimer0, value);
break;
case R_TIMER1_COUNTER: case R_TIMER1_COUNTER:
if (value > s->regs[R_TIMER1_COUNTER]) { s->regs[addr] = value;
value = s->regs[R_TIMER1_COUNTER];
error_report("milkymist_sysctl: timer1: trying to write a "
"value greater than the limit. Clipping.");
}
/* milkymist timer counts up */
value = s->regs[R_TIMER1_COUNTER] - value;
ptimer_set_count(s->ptimer1, value);
break; break;
case R_TIMER0_COMPARE: case R_TIMER0_COMPARE:
ptimer_set_limit(s->ptimer0, value, 0); ptimer_set_limit(s->ptimer0, value, 0);
@ -170,10 +154,12 @@ static void sysctl_write(void *opaque, target_phys_addr_t addr, uint32_t value)
case R_TIMER0_CONTROL: case R_TIMER0_CONTROL:
s->regs[addr] = value; s->regs[addr] = value;
if (s->regs[R_TIMER0_CONTROL] & CTRL_ENABLE) { if (s->regs[R_TIMER0_CONTROL] & CTRL_ENABLE) {
trace_milkymist_sysctl_start_timer1(); trace_milkymist_sysctl_start_timer0();
ptimer_set_count(s->ptimer0,
s->regs[R_TIMER0_COMPARE] - s->regs[R_TIMER0_COUNTER]);
ptimer_run(s->ptimer0, 0); ptimer_run(s->ptimer0, 0);
} else { } else {
trace_milkymist_sysctl_stop_timer1(); trace_milkymist_sysctl_stop_timer0();
ptimer_stop(s->ptimer0); ptimer_stop(s->ptimer0);
} }
break; break;
@ -181,6 +167,8 @@ static void sysctl_write(void *opaque, target_phys_addr_t addr, uint32_t value)
s->regs[addr] = value; s->regs[addr] = value;
if (s->regs[R_TIMER1_CONTROL] & CTRL_ENABLE) { if (s->regs[R_TIMER1_CONTROL] & CTRL_ENABLE) {
trace_milkymist_sysctl_start_timer1(); trace_milkymist_sysctl_start_timer1();
ptimer_set_count(s->ptimer1,
s->regs[R_TIMER1_COMPARE] - s->regs[R_TIMER1_COUNTER]);
ptimer_run(s->ptimer1, 0); ptimer_run(s->ptimer1, 0);
} else { } else {
trace_milkymist_sysctl_stop_timer1(); trace_milkymist_sysctl_stop_timer1();