From 7e1d36f35b7757c7d3482d973370e71a9dfc9504 Mon Sep 17 00:00:00 2001
From: Jörg Hohensohn <hohensoh@rockbox.org>
Date: Sat, 19 Feb 2005 14:45:34 +0000
Subject: Ondio: disk activity indication in USB mode, too

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6020 a1c6a512-1295-4272-9138-f99709370657
---
 apps/screens.c             |  3 +++
 firmware/drivers/ata_mmc.c | 22 +++++++++++++++++++---
 firmware/export/adc.h      |  1 +
 firmware/export/ata_mmc.h  |  1 +
 4 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/apps/screens.c b/apps/screens.c
index 10f9dd234d..145d2bbaca 100644
--- a/apps/screens.c
+++ b/apps/screens.c
@@ -111,6 +111,9 @@ void usb_screen(void)
     usb_display_info();
     while(usb_wait_for_disconnect_w_tmo(&button_queue, HZ)) {
         if(usb_inserted()) {
+#ifdef HAVE_MMC /* USB-MMC bridge can report activity */
+            led(mmc_usb_active(HZ));
+#endif
             status_draw(false);
         }
     }
diff --git a/firmware/drivers/ata_mmc.c b/firmware/drivers/ata_mmc.c
index 7139f0394f..2ba465f63d 100644
--- a/firmware/drivers/ata_mmc.c
+++ b/firmware/drivers/ata_mmc.c
@@ -121,6 +121,8 @@ static int current_card = 0;
 #endif
 static bool last_mmc_status = false;
 static int countdown;  /* for mmc switch debouncing */
+static bool usb_activity; /* monitoring the USB bridge */
+static long last_activity;
 
 /* private function declarations */
 
@@ -708,7 +710,7 @@ int ata_write_sectors(IF_MV2(int drive,)
     addr = start * SECTOR_SIZE;
     
     mutex_lock(&mmc_mutex);
-	led(true);
+    led(true);
 #ifdef HAVE_MULTIVOLUME
     card = &card_info[drive];
     ret = select_card(drive);
@@ -753,7 +755,7 @@ int ata_write_sectors(IF_MV2(int drive,)
     }
 
     deselect_card();
-	led(false);
+    led(false);
     mutex_unlock(&mmc_mutex);
 
     /* only flush if writing went ok */
@@ -842,12 +844,26 @@ bool mmc_detect(void)
     return adc_read(ADC_MMC_SWITCH) < 0x200 ? true : false;
 }
 
+bool mmc_usb_active(int delayticks)
+{
+    /* reading "inactive" is delayed by user-supplied monoflop value */
+    return (usb_activity ||
+            TIME_BEFORE(current_tick, last_activity+delayticks));
+}
+
 static void mmc_tick(void)
 {
     bool current_status;
 
+    /* USB bridge activity is 0 on idle, ~527 on active */
+    current_status = adc_read(ADC_USB_ACTIVE) > 0x100;
+    if (!current_status && usb_activity)
+    {
+        last_activity = current_tick;
+    }
+    usb_activity = current_status;
+
     current_status = mmc_detect();
-    
     /* Only report when the status has changed */
     if (current_status != last_mmc_status)
     {
diff --git a/firmware/export/adc.h b/firmware/export/adc.h
index b1d78eac8f..a18cb1995a 100644
--- a/firmware/export/adc.h
+++ b/firmware/export/adc.h
@@ -40,6 +40,7 @@
 #define ADC_BUTTON_ONOFF        3 /* the on/off button, high value if pressed */
 #define ADC_BUTTON_ROW1         4 /* Used for scanning the keys, different
                                      voltages for different keys */
+#define ADC_USB_ACTIVE          5 /* USB bridge activity */
 #define ADC_UNREG_POWER         7 /* Battery voltage */
 
 #else
diff --git a/firmware/export/ata_mmc.h b/firmware/export/ata_mmc.h
index 957849925b..6c5141dd05 100644
--- a/firmware/export/ata_mmc.h
+++ b/firmware/export/ata_mmc.h
@@ -41,5 +41,6 @@ bool mmc_detect(void);
 unsigned long mmc_extract_bits(const unsigned long *p, unsigned int start,
                                unsigned int size);
 tCardInfo *mmc_card_info(int card_no);
+bool mmc_usb_active(int delayticks);
 
 #endif
-- 
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