From ecd80d888e8fe933c68a3618a1edfe7e667a9227 Mon Sep 17 00:00:00 2001
From: Frank Gevaerts <frank@gevaerts.be>
Date: Sun, 12 Dec 2010 20:03:42 +0000
Subject: Move AMSv1 USB to the USB_DETECT_BY_DRV model, so connecting to a
 dumb charger works without interrupting playback

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28819 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/export/config.h                    |  5 ++++-
 firmware/target/arm/as3525/usb-as3525.c     | 21 +++++++++++++++++----
 firmware/target/arm/as3525/usb-drv-as3525.c |  1 +
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/firmware/export/config.h b/firmware/export/config.h
index 0cc3251c70..8e9afe5937 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -724,8 +724,11 @@ Lyre prototype 1 */
 #if CONFIG_CPU != IMX31L
 #define INCLUDE_TIMEOUT_API
 #endif
-#endif /* HAVE_USBSTACK */
+#endif /* HAVE_USBSTACK && USBOTG_ARC */
 
+#if defined(HAVE_USBSTACK) && CONFIG_USBOTG == USBOTG_AS3525
+#define USB_DETECT_BY_DRV
+#endif /* HAVE_USBSTACK && USBOTG_AS3525 */
 
 #endif /* BOOTLOADER */
 
diff --git a/firmware/target/arm/as3525/usb-as3525.c b/firmware/target/arm/as3525/usb-as3525.c
index 45e608a6fe..1c411b074f 100644
--- a/firmware/target/arm/as3525/usb-as3525.c
+++ b/firmware/target/arm/as3525/usb-as3525.c
@@ -29,7 +29,8 @@
 #include "power.h"
 #include "as3525.h"
 
-static int usb_status = USB_EXTRACTED;
+static bool bus_activity = 0;
+static bool connected = 0;
 
 void usb_enable(bool on)
 {
@@ -45,12 +46,19 @@ void usb_enable(bool on)
 
 void usb_insert_int(void)
 {
-    usb_status = USB_INSERTED;
+    connected = 1;
 }
 
 void usb_remove_int(void)
 {
-    usb_status = USB_EXTRACTED;
+    connected = 0;
+    bus_activity = 0;
+}
+
+void usb_drv_usb_detect_event(void)
+{
+    /* Bus activity seen */
+    bus_activity = 1;
 }
 
 int usb_detect(void)
@@ -61,5 +69,10 @@ int usb_detect(void)
      * TODO: Implement USB in rockbox for these players */
     return USB_EXTRACTED;
 #endif
-    return usb_status;
+    if(bus_activity && connected)
+        return USB_INSERTED;
+    else if(connected)
+        return USB_POWERED;
+    else
+        return USB_EXTRACTED;
 }
diff --git a/firmware/target/arm/as3525/usb-drv-as3525.c b/firmware/target/arm/as3525/usb-drv-as3525.c
index 3a2cc9df3f..2e5330ec1b 100644
--- a/firmware/target/arm/as3525/usb-drv-as3525.c
+++ b/firmware/target/arm/as3525/usb-drv-as3525.c
@@ -754,6 +754,7 @@ void INT_USB(void)
         }
         if (intr & USB_DEV_INTR_USB_RESET) {/* usb reset from host? */
             logf("usb reset\n");
+            usb_drv_usb_detect_event();
             reset_endpoints(1);
             usb_core_bus_reset();
             intr &= ~USB_DEV_INTR_USB_RESET;
-- 
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