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>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/stmf0/ao_usb_stm.c b/src/stmf0/ao_usb_stm.c
index 253506d5..a67fc868 100644
--- 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);