Messages in this thread | | | Subject | Re: VIA VT6307 OHCI version? | From | Krzysztof Halasa <> | Date | Sat, 20 Oct 2007 00:42:34 +0200 |
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> OTOH, it's no magic - they claim OHCI 1.1 and they do it. We don't > only know how to enable it with (only) software. I suspect all those > VT6306 could be "upgraded" as well.
BTW: I've looked at it a bit closer and it seems the EEPROM lines are controlled by VT6307 I/O ports (region #1) 0x0 and 0x20:
01:04.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80) (prog-if 10 [OHCI]) Memory at feafe800 (32-bit, non-prefetchable) [size=2K] I/O ports at d480 [size=128] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
port 0x20 R/O bit 8 is set in 93c46 mode and reset in I^2C mode port 0x20 bit 4 must be set to drive CS, CLK and DATA-OUT outputs port 0x20 bits 3, 2 and 1 are, respectively, CS, CLK and DATA-OUT pins in 93c46 mode and unused, SCL and SDA pins in I^2C mode port 0x20 R/O bit 0 is DATA-IN input in 93c46 mode
port 0x0 bit 8 must be set to enable access port 0x20 must be written 0x20 (bit 5 only) to disable access (clears port 0x0 bit 8).
They are all 32-bit I/O ports.
The above allows for complete control in 93c46 mode (I'll make the program available later) and unfortunately I don't yet know how to read SDA (and SCL) state in I^2C mode (I can blindly write to the EEPROM and I can read the EEPROM data using GUID PROM register so there is a workaround). -- Krzysztof Halasa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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