add ext power detect & dev reset

Change-Id: Ied62450670dba2227daa96cbcd162cfe8414445a
---
M sysmoOCTSIM/main.c
M sysmoOCTSIM/usb/device/usbdc.c
2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/sysmoOCTSIM/main.c b/sysmoOCTSIM/main.c
index afb70e9..9849298 100644
--- a/sysmoOCTSIM/main.c
+++ b/sysmoOCTSIM/main.c
@@ -324,7 +324,19 @@
 	}
 }
 
+/* used to update the usb ext power dev status flag + reset the device when (un)plugging ext power */
+bool old_extpwer_state = 0;
+void init_extpower_detect(void)
+{
+	old_extpwer_state = gpio_get_pin_level(MUX_STAT);
+}
 
+void poll_extpower_detect(void)
+{
+	if (old_extpwer_state != gpio_get_pin_level(MUX_STAT)) {
+		NVIC_SystemReset();
+	}
+}
 
 /***********************************************************************
  * Command Line interface
@@ -516,6 +528,7 @@
 	get_rstcause_str(rstcause_buf);
 
 	atmel_start_init();
+	init_extpower_detect();
 	board_init();
 	usb_init();
 	usb_start();
@@ -578,6 +591,7 @@
 	while (true) { // main loop
 		if (delayed_usb_reset)
 			do_usb_res();
+		poll_extpower_detect();
 		command_try_recv();
 		poll_card_detect();
 		submit_next_irq();
diff --git a/sysmoOCTSIM/usb/device/usbdc.c b/sysmoOCTSIM/usb/device/usbdc.c
index 3cfd7bc..4b84937 100644
--- a/sysmoOCTSIM/usb/device/usbdc.c
+++ b/sysmoOCTSIM/usb/device/usbdc.c
@@ -35,6 +35,8 @@
 
 #define USBDC_VERSION 0x00000001u
 
+extern bool old_extpwer_state;
+
 /**
  * \brief USB Device Core Sof Handler
  */
@@ -318,6 +320,8 @@
 
 	switch (req->bmRequestType & USB_REQT_RECIP_MASK) {
 	case USB_REQT_RECIP_DEVICE:
+		st = old_extpwer_state ? 0x0 : 0x1;
+		break;
 	case USB_REQT_RECIP_INTERFACE:
 		st = 0;
 		break;

