Wei-Han Chen b245e71e82
stm32: add usb_isochronous ...
Templates for USB isochronous implementation. Current implementation
only supports TX transmit. Example of usage can be found in CL:803414.
Basically, declare an USB isochronous interface by
USB_ISOCHRONOUS_CONFIG_FULL(<NAME>,
<INTERFACE_NUM>,
<USB_CLASS>,
<USB_SUBCLASS>,
<SUB_PROTOCOL>,
<USB_STR_FOR_INTERFACE_NAME>,
<USB_EP_NUM>,
<PACKET_SIZE>,
<TX_CALLBACK>,
<SET_INTERFACE>)
where <PACKET_SIZE> is size of each USB packet, <TX_CALLBACK> is called
when USB hardware has completed a packet. The buffer that USB is not
currently using will be passed to <TX_CALLBACK>, allow applications to
write next packet to it.
When a SET_INTERFACE packet is received, <SET_INTERFACE> will be called
with bAlternateSetting and bInterfaceNumber.
We will declare interface descriptor with bAlternateSetting = 0 and 1
for you, if you need more alternate settings, you need to declare by
yourself.
BUG=b:70482333
TEST=manually on reworked staff board
Signed-off-by: Wei-Han Chen <stimim@google.com >
Change-Id: Ic6d41da6ddd7945edf0bdfff55ede38a97661783
Reviewed-on: https://chromium-review.googlesource.com/818853
Commit-Ready: Wei-Han Chen <stimim@chromium.org >
Tested-by: Wei-Han Chen <stimim@chromium.org >
Reviewed-by: Wei-Han Chen <stimim@chromium.org >
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org >
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b245e71e82