stmf0: Clear all USB state when resetting chip. Wakeup all sleepers

When USB is reset, but the board is not power cycled, all of the
internal USB state needs to be reset, and any tasks blocked on sending
or receiving packets need to be awoken so they can go wait for USB to
start running again.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/stmf0/ao_usb_stm.c b/src/stmf0/ao_usb_stm.c
index 253506d59800623a5884e3f90f8814a2a19f71e4..a67fc868f63db8e5c557a33ef0fa1e1f23686e3b 100644 (file)
--- a/src/stmf0/ao_usb_stm.c
+++ b/src/stmf0/ao_usb_stm.c
@@ -437,6 +437,17 @@ ao_usb_set_ep0(void)
        ao_usb_set_address(0);
 
        ao_usb_running = 0;
+
+       /* Reset our internal state
+        */
+
+       ao_usb_ep0_state = AO_USB_EP0_IDLE;
+
+       ao_usb_ep0_in_data = NULL;
+       ao_usb_ep0_in_len = 0;
+
+       ao_usb_ep0_out_data = 0;
+       ao_usb_ep0_out_len = 0;
 }
 
 static void
@@ -493,6 +504,20 @@ ao_usb_set_configuration(void)
                       STM_USB_EPR_STAT_TX_NAK);
 #endif
 
+       ao_usb_in_flushed = 0;
+       ao_usb_in_pending = 0;
+       ao_wakeup(&ao_usb_in_pending);
+#if AO_USB_HAS_IN2
+       ao_usb_in2_flushed = 0;
+       ao_usb_in2_pending = 0;
+       ao_wakeup(&ao_usb_in2_pending);
+#endif
+
+       ao_usb_out_avail = 0;
+       ao_usb_configuration = 0;
+
+       ao_wakeup(AO_USB_OUT_SLEEP_ADDR);
+
        ao_usb_running = 1;
 #if AO_USB_DIRECTIO
        ao_wakeup(&ao_usb_running);