From 4812a72ceaada294477b4c2015c42cb8bcbe93a4 Mon Sep 17 00:00:00 2001
From: Nick Pelly <npelly@google.com>
Date: Tue, 7 Jun 2011 10:37:09 -0700
Subject: Patch to dynamically enable NFC LOW_LEVEL_TRACES

low level traces can be enabled at run-time with:
adb shell setprop debug.nfc.LOW_LEVEL_TRACES 1
and disabled with
adb shell setprop debug.nfc.LOW_LEVEL_TRACES 0

NFC must be turned off and on again for this change to take affect.

Change-Id: Iefdc4873b3ee5bc697f34b307c22c06a6eda0667

Signed-off-by: Nick Pelly <npelly@google.com>
---
 Linux_x86/phDal4Nfc.c | 35 +++++++++++++++++++++++++++++------
 1 file changed, 29 insertions(+), 6 deletions(-)

(limited to 'Linux_x86')

diff --git a/Linux_x86/phDal4Nfc.c b/Linux_x86/phDal4Nfc.c
index a8803e2..2428f6c 100644
--- a/Linux_x86/phDal4Nfc.c
+++ b/Linux_x86/phDal4Nfc.c
@@ -33,6 +33,8 @@
 #include <stdlib.h>
 #ifdef ANDROID
 #include <linux/ipc.h>
+#include <cutils/log.h>
+#include <cutils/properties.h> // for property_get
 #else
 #include <sys/msg.h>
 #endif
@@ -98,6 +100,7 @@ static phDal4Nfc_SContext_t           gDalContext;
 static pphDal4Nfc_SContext_t          pgDalContext;
 static phHal_sHwReference_t   *       pgDalHwContext;
 static sem_t                          nfc_read_sem;
+static int                            low_level_traces;
 #ifdef USE_MQ_MESSAGE_QUEUE
 static phDal4Nfc_DeferredCall_Msg_t   nDeferedMessage;
 static mqd_t                          nDeferedCallMessageQueueId;
@@ -117,6 +120,21 @@ static void      phDal4Nfc_FillMsg        (phDal4Nfc_Message_t *pDalMsg, phOsalN
                                 DAL API IMPLEMENTATION
 ------------------------------------------------------------------------------------*/
 
+static void refresh_low_level_traces() {
+#ifdef ANDROID
+    char value[1];
+    property_get("debug.nfc.LOW_LEVEL_TRACES", value, "");
+    if (value[0]) {
+        low_level_traces = atoi(value);
+        DAL_DEBUG("debug.nfc.LOW_LEVEL_TRACES = %X", mode);
+    }
+#endif
+
+#ifdef LOW_LEVEL_TRACES
+    low_level_traces = 1;
+#endif
+}
+
 /*-----------------------------------------------------------------------------
 
 FUNCTION: phDal4Nfc_Register
@@ -216,6 +234,8 @@ NFCSTATUS phDal4Nfc_Init(void *pContext, void *pHwRef )
 {
     NFCSTATUS        result = NFCSTATUS_SUCCESS;
 
+    refresh_low_level_traces();
+
     if ((NULL != pContext) && (NULL != pHwRef))
     {
         pContext  = pgDalContext;
@@ -707,9 +727,11 @@ retry:
     else
     {
         i2c_error_count = 0;
-#ifdef LOW_LEVEL_TRACES
-        phOsalNfc_PrintData("Received buffer", (uint16_t)gReadWriteContext.nNbOfBytesRead, gReadWriteContext.pReadBuffer);
-#endif
+
+        if (low_level_traces)
+        {
+             phOsalNfc_PrintData("Received buffer", (uint16_t)gReadWriteContext.nNbOfBytesRead, gReadWriteContext.pReadBuffer);
+        }
         DAL_DEBUG("Read ok. nbToRead=%d\n", gReadWriteContext.nNbOfBytesToRead);
         DAL_DEBUG("NbReallyRead=%d\n", gReadWriteContext.nNbOfBytesRead);
         DAL_PRINT("ReadBuff[]={ ");
@@ -851,9 +873,10 @@ void phDal4Nfc_DeferredCb (void  *params)
         case PHDAL4NFC_WRITE_MESSAGE:
             DAL_PRINT(" Dal deferred write called \n");
 
-#ifdef LOW_LEVEL_TRACES
-            phOsalNfc_PrintData("Send buffer", (uint16_t)gReadWriteContext.nNbOfBytesToWrite, gReadWriteContext.pWriteBuffer);
-#endif
+            if(low_level_traces)
+            {
+                phOsalNfc_PrintData("Send buffer", (uint16_t)gReadWriteContext.nNbOfBytesToWrite, gReadWriteContext.pWriteBuffer);
+            }
 
             /* DAL_DEBUG("dalMsg->transactInfo.length : %d\n", dalMsg->transactInfo.length); */
             /* Make a Physical WRITE */
-- 
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