In message <[EMAIL PROTECTED]>, $B<<D.M%9a(B wrote: >Hi: > >I'm trying to written Azalia (HD Audio) driver for freebsd now. > >The HDA controller is a standard controller, which can take max= >15 codecs. I'm planning made it be a bus driver (azalia bus). > >I tried to read the PCI, USB and Firewire driver code be sample. >It looks: > >1. Detect codec which already connected to azalia controller. >2. call device_add_child(azbus_dev, NULL, -1); to create a child > device, which attach to azalia bus driver. >3. allocate memory to put codec info (e.g. device id, vendor id,=20 > revision..etc), and call device_set_ivars(codec_dev, codec_info); > save the codec_info ptr into device's ivars. >4. Continue 1 ~ 3, untin all available codecs be added. > >After all codecs be added, I call the device_probe_and_attach(azbus_dev);, >but there is no thing happend.=20
Because it trys to attach azbus driver itself, not try to attach its child. >Then I try to call bus_generic_attach(azbus_dev);, the codecs driver probe >function be called. >Is this correct (use bus_generic_attach()), and I'm interested the detail. Correct. It calls device_probe_and_attach() for all child you already add. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
