diff options
| author | Rafał Miłecki <zajec5@gmail.com> | 2011-04-27 17:40:11 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-05-02 14:49:14 -0400 |
| commit | 0ca699552c441e2c4201a6f60eac98b8865c1743 (patch) | |
| tree | 7e9e68d7ce291b6ab32c0ff89c69e983d70f24c6 /drivers | |
| parent | d6d023a1948d13652d719238f8039c09acceda8c (diff) | |
| download | linux-0ca699552c441e2c4201a6f60eac98b8865c1743.tar.bz2 | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ssb/driver_chipcommon.c | 62 |
1 files changed, 44 insertions, 18 deletions
diff --git a/drivers/ssb/driver_chipcommon.c b/drivers/ssb/driver_chipcommon.c index b4b3733aefcf..06d15b6f2215 100644 --- a/drivers/ssb/driver_chipcommon.c +++ b/drivers/ssb/driver_chipcommon.c @@ -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); - - /* 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); + 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); + } else { + chipco_write32(cc, SSB_CHIPCO_SYSCLKCTL, + (chipco_read32(cc, SSB_CHIPCO_SYSCLKCTL) & + ~SSB_CHIPCO_SYSCLKCTL_FORCEHT)); + } break; default: SSB_WARN_ON(1); |