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Due to possible PCI bus lock-up issues fxp(4) didn't perform full

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hardware reset in attach phase. Selective reset does not clear
configured parameters so I think full hardware reset is required.
To prevent PCI bus lock-up, do selective reset first which will get
off the controller from PCI bus and request software reset after
selective reset. Software reset will unmask interrupts so disable
it after the reset.
This commit is contained in:
Pyun YongHyeon 2009-06-21 06:18:19 +00:00
parent a2057a72e9
commit a996f02399
1 changed files with 5 additions and 1 deletions
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6
sys/dev/fxp/if_fxp.c
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@ -466,10 +466,14 @@ fxp_attach(device_t dev)
}
/*
* Reset to a stable state.
* Put CU/RU idle state and prepare full reset.
*/
CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET);
DELAY(10);
/* Full reset and disable interrupts. */
CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SOFTWARE_RESET);
DELAY(10);
CSR_WRITE_1(sc, FXP_CSR_SCB_INTRCNTL, FXP_SCB_INTR_DISABLE);
/*
* Find out how large of an SEEPROM we have.