Make sure command/data port (0x60) and status port (0x64) are in correct
order. Some brain-damaged ACPI BIOS has reversed resources.
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=160091
@ -112,15 +112,21 @@ atkbdc_isa_probe(device_t dev)
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* The AT keyboard controller uses two ports (a command/data port
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* 0x60 and a status port 0x64), which may be given to us in
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* one resource (0x60 through 0x64) or as two separate resources
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* (0x60 and 0x64). Furthermore, /boot/device.hints may contain
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* just one port, 0x60. We shall adjust resource settings
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* so that these two ports are available as two separate resources.
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* (0x60 and 0x64). Some brain-damaged ACPI BIOS has reversed
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* command/data port and status port. Furthermore, /boot/device.hints
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* may contain just one port, 0x60. We shall adjust resource settings
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* so that these two ports are available as two separate resources
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* in correct order.
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*/
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device_quiet(dev);
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rid = 0;
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if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0)
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return ENXIO;
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if (count > 1) /* adjust the count */
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if (start == IO_KBD + KBD_STATUS_PORT) {
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start = IO_KBD;
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count++;
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}
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if (count > 1) /* adjust the count and/or start port */
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bus_set_resource(dev, SYS_RES_IOPORT, rid, start, 1);
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port0 = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE);
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if (port0 == NULL)
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