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firmware: More common infrastructure for USB handling

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Let's move low-level handling of endpoint queue refill from the
individual apps into common/shared code.

Now the main simply has to call usb_process() for every interface,
and inbound messages will be dispatched to call-back functions from
there.

Change-Id: Ic6f9c6c1ffdbb0c9c3b284371ecc83b17e3be746
This commit is contained in:
Harald Welte
2020-01-11 17:15:26 +01:00
parent 29de264d6e
commit d2bc858ddf
5 changed files with 109 additions and 63 deletions
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14
firmware/libcommon/include/usb_buf.h
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@@ -42,5 +42,15 @@ int usb_drain_queue(uint8_t ep);
void usb_buf_init(void);
struct usb_buffered_ep *usb_get_buf_ep(uint8_t ep);
int usb_refill_to_host(uint8_t ep);
int usb_refill_from_host(uint8_t ep);
struct usb_if {
uint8_t if_num; /* interface number */
uint8_t ep_out; /* OUT endpoint (0 if none) */
uint8_t ep_in; /* IN endpint (0 if none) */
uint8_t ep_int; /* INT endpoint (0 if none) */
void *data; /* opaque data, passed through */
struct {
/* call-back to be called for inclming messages on OUT EP */
void (*rx_out)(struct msgb *msg, const struct usb_if *usb_if);
} ops;
};
void usb_process(const struct usb_if *usb_if);