diff options
Diffstat (limited to 'payloads/libpayload/drivers/usb/TODO')
| -rw-r--r-- | payloads/libpayload/drivers/usb/TODO | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/usb/TODO b/payloads/libpayload/drivers/usb/TODO new file mode 100644 index 0000000000..1dfc9d40ab --- /dev/null +++ b/payloads/libpayload/drivers/usb/TODO @@ -0,0 +1,22 @@ +- handle error conditions +- handle disconnect more gracefully (ie. make calling layer aware that the device doesn't exist somehow) +- usbhub: + - proper client enumeration (esp. detach) + - change detection + - power management +- handle interrupts more cleverly: + create a new queue for the interrupt with a couple of TD sequences, + - each ending with "breadth first" flag + - linked as a chain + add that queue at the appropriate times in front of the default structure so the max latency is honored + - only one intr chain per framelist item, so it must be arranged appropriately + reads from usb device just look at "invalidated" tds and the results they got + handled tds get reactivated as a ring structure + - added as child of the oldest td + - queue header already dropped the td, so no issue there + + this setup ensures that: + - the max latency of the device is honored + - the client knows the right order of the data + - there is no need for an interrupt handler + - but must be polled at least max latency * num tds times -> more tds = less time pressure |