Author: yongari
Date: Wed Dec 7 23:20:14 2011
New Revision: 228336
URL: http://svn.freebsd.org/changeset/base/228336
Log:
Disable all clocks and put PHY into COMA before entering into
suspend state. This will save more power.
On resume, make sure to enable all clocks. While I'm here, if
controller is not fast ethernet, enable gigabit PHY.
Modified:
head/sys/dev/et/if_et.c
head/sys/dev/et/if_etreg.h
Modified: head/sys/dev/et/if_et.c
==============================================================================
--- head/sys/dev/et/if_et.c Wed Dec 7 22:04:57 2011 (r228335)
+++ head/sys/dev/et/if_et.c Wed Dec 7 23:20:14 2011 (r228336)
@@ -220,6 +220,7 @@ et_attach(device_t dev)
struct et_softc *sc;
struct ifnet *ifp;
uint8_t eaddr[ETHER_ADDR_LEN];
+ uint32_t pmcfg;
int cap, error, msic;
sc = device_get_softc(dev);
@@ -304,8 +305,11 @@ et_attach(device_t dev)
et_get_eaddr(dev, eaddr);
- CSR_WRITE_4(sc, ET_PM,
- ET_PM_SYSCLK_GATE | ET_PM_TXCLK_GATE | ET_PM_RXCLK_GATE);
+ /* Take PHY out of COMA and enable clocks. */
+ pmcfg = ET_PM_SYSCLK_GATE | ET_PM_TXCLK_GATE | ET_PM_RXCLK_GATE;
+ if ((sc->sc_flags & ET_FLAG_FASTETHER) == 0)
+ pmcfg |= EM_PM_GIGEPHY_ENB;
+ CSR_WRITE_4(sc, ET_PM, pmcfg);
et_reset(sc);
@@ -2636,11 +2640,18 @@ static int
et_suspend(device_t dev)
{
struct et_softc *sc;
+ uint32_t pmcfg;
sc = device_get_softc(dev);
ET_LOCK(sc);
if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
et_stop(sc);
+ /* Diable all clocks and put PHY into COMA. */
+ pmcfg = CSR_READ_4(sc, ET_PM);
+ pmcfg &= ~(EM_PM_GIGEPHY_ENB | ET_PM_SYSCLK_GATE | ET_PM_TXCLK_GATE |
+ ET_PM_RXCLK_GATE);
+ pmcfg |= ET_PM_PHY_SW_COMA;
+ CSR_WRITE_4(sc, ET_PM, pmcfg);
ET_UNLOCK(sc);
return (0);
}
@@ -2649,9 +2660,15 @@ static int
et_resume(device_t dev)
{
struct et_softc *sc;
+ uint32_t pmcfg;
sc = device_get_softc(dev);
ET_LOCK(sc);
+ /* Take PHY out of COMA and enable clocks. */
+ pmcfg = ET_PM_SYSCLK_GATE | ET_PM_TXCLK_GATE | ET_PM_RXCLK_GATE;
+ if ((sc->sc_flags & ET_FLAG_FASTETHER) == 0)
+ pmcfg |= EM_PM_GIGEPHY_ENB;
+ CSR_WRITE_4(sc, ET_PM, pmcfg);
if ((sc->ifp->if_flags & IFF_UP) != 0)
et_init_locked(sc);
ET_UNLOCK(sc);
Modified: head/sys/dev/et/if_etreg.h
==============================================================================
--- head/sys/dev/et/if_etreg.h Wed Dec 7 22:04:57 2011 (r228335)
+++ head/sys/dev/et/if_etreg.h Wed Dec 7 23:20:14 2011 (r228336)
@@ -93,9 +93,11 @@
#define ET_QUEUE_ADDR_END ET_QUEUE_ADDR(ET_MEM_SIZE)
#define ET_PM 0x0010
+#define EM_PM_GIGEPHY_ENB 0x00000001
#define ET_PM_SYSCLK_GATE 0x00000008
#define ET_PM_TXCLK_GATE 0x00000010
#define ET_PM_RXCLK_GATE 0x00000020
+#define ET_PM_PHY_SW_COMA 0x00000040
#define ET_INTR_STATUS 0x0018
#define ET_INTR_MASK 0x001C
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