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bcma: set the pmu watchdog if available 

Mostly all bcma based devices have a PMU and the PMU watchdog should be
used and not the old one in chip common. This patch also calculates the
maximal number the watchdog could be set to.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hauke Mehrtens 2012-12-05 18:46:00 +01:00 committed by John W. Linville
parent 56fd5f0772
commit f6354c8cf9
1 changed files with 40 additions and 2 deletions
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42
drivers/bcma/driver_chipcommon.c
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@ -31,6 +31,28 @@ static u32 bcma_chipco_alp_clock(struct bcma_drv_cc *cc)
return 20000000;
}
static u32 bcma_chipco_watchdog_get_max_timer(struct bcma_drv_cc *cc)
{
struct bcma_bus *bus = cc->core->bus;
u32 nb;
if (cc->capabilities & BCMA_CC_CAP_PMU) {
if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
nb = 32;
else if (cc->core->id.rev < 26)
nb = 16;
else
nb = (cc->core->id.rev >= 37) ? 32 : 24;
} else {
nb = 28;
}
if (nb == 32)
return 0xffffffff;
else
return (1 << nb) - 1;
}
void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
{
if (cc->early_setup_done)
@ -85,8 +107,24 @@ void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
void bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
{
/* instant NMI */
bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
u32 maxt;
enum bcma_clkmode clkmode;
maxt = bcma_chipco_watchdog_get_max_timer(cc);
if (cc->capabilities & BCMA_CC_CAP_PMU) {
if (ticks == 1)
ticks = 2;
else if (ticks > maxt)
ticks = maxt;
bcma_cc_write32(cc, BCMA_CC_PMU_WATCHDOG, ticks);
} else {
clkmode = ticks ? BCMA_CLKMODE_FAST : BCMA_CLKMODE_DYNAMIC;
bcma_core_set_clockmode(cc->core, clkmode);
if (ticks > maxt)
ticks = maxt;
/* instant NMI */
bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
}
}
void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)