IMHO the current name is somewhat misleading:
- usb_drv_send() is blocking and we have usb_drv_send_nonblocking()
for the non-blocking case. This inconsistent naming can only
promote confusion. (And what would we call a blocking receive?)
- Other hardware abstraction APIs in Rockbox are usually blocking:
storage, LCD, backlight, audio... in other words, blocking is the
default expected behavior, with non-blocking calls being a rarity.
Change-Id: I05b41088d09eab582697674f4f06fdca0c8950af
Disabling double buffering results in expected CPPI TX behaviour. With
the double buffering enabled, sending single ZLP resulted in two ZLPs
being available. The two ZLPs is problematic because this causes Windows
to reset USB device after failed SCSI command.
The problematic sequence on Windows 10 was as follows:
* Host sends SCSI Mode Sense(6) Informational Exceptions Control(0x1C)
* Device sends ZLP
* Device sends command failed response
With endpoint double buffering enabled the ZLP was read twice by host.
As host was expecting command response on the second read (and got ZLP
instead), host attempts recovery by resetting USB device and retrying.
Change-Id: I64e95998f429ffb7b14143d956b1f29d20218d14
Acknowledge SYS_USB_CONNECTED in all queues so USB task can gain
exclusive access to the storage.
Reduce CPPI requeue timeout to speed up disk access.
Change-Id: I322aae4cac679696bb8186ccacf838a18f0715e9
Correctly set endpoint maximum packet size so host will not consider
end of transfer after receiving first packet when transfer is larger
than 64 bytes (at High Speed the endpoint max packet size was set to
64 but according to descriptor it is 512).
Split DMA transfers up to CPPI_MAX_FRAG so we get single interrupt
after each call to tnetv_cppi_send().
Change-Id: I385b66bc5d71975a4e3e9167efac0b1334bd3ffc
Port USB driver from Sansa Connect Linux kernel sources. The device
successfully enumerates and responds to SCSI commands but actual disk
access does not work. The SCSI response sent to host mentions that both
internal storage and microsd card are not present.
Change-Id: Ic6c07da12382c15c0b069f23a75f7df9765b7525
