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Fix a long standing VCPU reset sequence bug on BCM5906.

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The VCPU(Virtual CPU) of BCM5906 is used to provide a mechanism to
control the bootcode execution and to pick up configuration data
stored inside the EEPROM.
The bootcode of BCM5906 will check the BGE_VCPU_STATUS_DRV_RESET
bit to decide which booting procedure to choose.
Data sheet indicates the VCPU of BCM5906 should set
BGE_VCPU_STATUS_DRV_RESET bit *before* VCPU reset or global reset.
This commit is contained in:
Pyun YongHyeon 2012-10-10 04:38:29 +00:00
parent ad49eccff0
commit df4db53856
1 changed files with 9 additions and 9 deletions
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18
sys/dev/bge/if_bge.c
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@ -3616,6 +3616,15 @@ bge_reset(struct bge_softc *sc)
}
}
if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
val = CSR_READ_4(sc, BGE_VCPU_STATUS);
CSR_WRITE_4(sc, BGE_VCPU_STATUS,
val | BGE_VCPU_STATUS_DRV_RESET);
val = CSR_READ_4(sc, BGE_VCPU_EXT_CTRL);
CSR_WRITE_4(sc, BGE_VCPU_EXT_CTRL,
val & ~BGE_VCPU_EXT_CTRL_HALT_CPU);
}
/*
* Set GPHY Power Down Override to leave GPHY
* powered up in D0 uninitialized.
@ -3627,15 +3636,6 @@ bge_reset(struct bge_softc *sc)
/* Issue global reset */
write_op(sc, BGE_MISC_CFG, reset);
if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
val = CSR_READ_4(sc, BGE_VCPU_STATUS);
CSR_WRITE_4(sc, BGE_VCPU_STATUS,
val | BGE_VCPU_STATUS_DRV_RESET);
val = CSR_READ_4(sc, BGE_VCPU_EXT_CTRL);
CSR_WRITE_4(sc, BGE_VCPU_EXT_CTRL,
val & ~BGE_VCPU_EXT_CTRL_HALT_CPU);
}
DELAY(1000);
/* XXX: Broadcom Linux driver. */