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ssb: cc: prepare clockmode support for cores rev 10+ 

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki 2011-04-27 17:40:11 +02:00 committed by John W. Linville
parent d6d023a194
commit 0ca699552c
1 changed files with 43 additions and 17 deletions
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60
drivers/ssb/driver_chipcommon.c
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@ -46,40 +46,66 @@ void ssb_chipco_set_clockmode(struct ssb_chipcommon *cc,
if (!ccdev)
return;
bus = ccdev->bus;
/* We support SLOW only on 6..9 */
if (ccdev->id.revision >= 10 && mode == SSB_CLKMODE_SLOW)
mode = SSB_CLKMODE_DYNAMIC;
if (cc->capabilities & SSB_CHIPCO_CAP_PMU)
return; /* PMU controls clockmode, separated function needed */
SSB_WARN_ON(ccdev->id.revision >= 20);
/* chipcommon cores prior to rev6 don't support dynamic clock control */
if (ccdev->id.revision < 6)
return;
/* chipcommon cores rev10 are a whole new ball game */
/* ChipCommon cores rev10+ need testing */
if (ccdev->id.revision >= 10)
return;
if (!(cc->capabilities & SSB_CHIPCO_CAP_PCTL))
return;
switch (mode) {
case SSB_CLKMODE_SLOW:
case SSB_CLKMODE_SLOW: /* For revs 6..9 only */
tmp = chipco_read32(cc, SSB_CHIPCO_SLOWCLKCTL);
tmp |= SSB_CHIPCO_SLOWCLKCTL_FSLOW;
chipco_write32(cc, SSB_CHIPCO_SLOWCLKCTL, tmp);
break;
case SSB_CLKMODE_FAST:
ssb_pci_xtal(bus, SSB_GPIO_XTAL, 1); /* Force crystal on */
tmp = chipco_read32(cc, SSB_CHIPCO_SLOWCLKCTL);
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_FSLOW;
tmp |= SSB_CHIPCO_SLOWCLKCTL_IPLL;
chipco_write32(cc, SSB_CHIPCO_SLOWCLKCTL, tmp);
if (ccdev->id.revision < 10) {
ssb_pci_xtal(bus, SSB_GPIO_XTAL, 1); /* Force crystal on */
tmp = chipco_read32(cc, SSB_CHIPCO_SLOWCLKCTL);
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_FSLOW;
tmp |= SSB_CHIPCO_SLOWCLKCTL_IPLL;
chipco_write32(cc, SSB_CHIPCO_SLOWCLKCTL, tmp);
} else {
chipco_write32(cc, SSB_CHIPCO_SYSCLKCTL,
(chipco_read32(cc, SSB_CHIPCO_SYSCLKCTL) |
SSB_CHIPCO_SYSCLKCTL_FORCEHT));
/* udelay(150); TODO: not available in early init */
}
break;
case SSB_CLKMODE_DYNAMIC:
tmp = chipco_read32(cc, SSB_CHIPCO_SLOWCLKCTL);
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_FSLOW;
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_IPLL;
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_ENXTAL;
if ((tmp & SSB_CHIPCO_SLOWCLKCTL_SRC) != SSB_CHIPCO_SLOWCLKCTL_SRC_XTAL)
tmp |= SSB_CHIPCO_SLOWCLKCTL_ENXTAL;
chipco_write32(cc, SSB_CHIPCO_SLOWCLKCTL, tmp);
if (ccdev->id.revision < 10) {
tmp = chipco_read32(cc, SSB_CHIPCO_SLOWCLKCTL);
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_FSLOW;
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_IPLL;
tmp &= ~SSB_CHIPCO_SLOWCLKCTL_ENXTAL;
if ((tmp & SSB_CHIPCO_SLOWCLKCTL_SRC) !=
SSB_CHIPCO_SLOWCLKCTL_SRC_XTAL)
tmp |= SSB_CHIPCO_SLOWCLKCTL_ENXTAL;
chipco_write32(cc, SSB_CHIPCO_SLOWCLKCTL, tmp);
/* for dynamic control, we have to release our xtal_pu "force on" */
if (tmp & SSB_CHIPCO_SLOWCLKCTL_ENXTAL)
ssb_pci_xtal(bus, SSB_GPIO_XTAL, 0);
/* For dynamic control, we have to release our xtal_pu
* "force on" */
if (tmp & SSB_CHIPCO_SLOWCLKCTL_ENXTAL)
ssb_pci_xtal(bus, SSB_GPIO_XTAL, 0);
} else {
chipco_write32(cc, SSB_CHIPCO_SYSCLKCTL,
(chipco_read32(cc, SSB_CHIPCO_SYSCLKCTL) &
~SSB_CHIPCO_SYSCLKCTL_FORCEHT));
}
break;
default:
SSB_WARN_ON(1);