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35 .Nd Workbit NinjaATA-32 CardBus IDE controller driver
37 .Cd "njata* at cardbus? function ?"
38 .Cd "njata* at cardbus? function ? flags 0x01 # with wait 0x01"
42 driver provides support for the following
43 Workbit Bus-Master CardBus IDE controller chips:
45 .Bl -tag -width "NinjaATA-32Bi" -offset indent
47 CardBus / PCMCIA dual mode IDE controller
49 This controller is mainly used for portable drives.
50 This driver supports the CardBus mode.
52 CardBus IDE controller.
53 This controller is widely used for CardBus CompactFlash adapters.
56 These controllers are capable of bus-mastering
60 driver uses the bus-mastering PIO transfer
61 unless transfer buffer is unaligned,
62 and significantly reduces CPU usage for PIO-only ATA devices
63 compared with usual PIO transfer.
65 The optional flags parameter is the
67 value for ATA transfers.
68 Some combinations of host and device may fail without flags parameter or
70 In this case try adding wait values like
74 (the wait parameter is composed of two 4bit values).
75 Smaller wait values should be faster.
76 Too long waits may cause transfer errors.
87 device driver first appeared in
90 .An ITOH Yasufumi Aq itohy@NetBSD.org