From e77ccab049d2df5252503e01aae180e6168024fa Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 2 Nov 2007 23:22:48 +0000
Subject: Finish TX timeout logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@366 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/drivers/net/dm90x0.c | 35 +++++++++++++++++++++++++++++------
 1 file changed, 29 insertions(+), 6 deletions(-)

(limited to 'nuttx')

diff --git a/nuttx/drivers/net/dm90x0.c b/nuttx/drivers/net/dm90x0.c
index 878664481..3be239619 100644
--- a/nuttx/drivers/net/dm90x0.c
+++ b/nuttx/drivers/net/dm90x0.c
@@ -267,10 +267,14 @@
 # define CONFIG_DM9X_MODE DM9X_MODE_AUTO
 #endif
 
-/* TX poll deley = 5 seconds. CLK_TCK is the number of clock ticks per second */
+// /* TX poll deley = 5 seconds. CLK_TCK is the number of clock ticks per second */
 
 #define DM6X_WDDELAY (5*CLK_TCK)
 
+/* TX timeout = 1 minute */
+
+#define DM6X_TXTIMEOUT (60*CLK_TCK)
+
 /* This is a helper pointer for accessing the contents of the Ethernet header */
 
 #define BUF ((struct uip_eth_hdr *)dm9x->dev.d_buf)
@@ -792,6 +796,10 @@ static int dm9x_transmit(struct dm9x_driver_s *dm9x)
   /* Re-enable DM90x0 interrupts */
 
   putreg(DM9X_IMR, DM9X_IMRENABLE);
+
+  /* Setup the TX timeout watchdog (perhaps restarting the timer) */
+
+  (void)wd_start(dm9x->txtimeout, DM6X_TXTIMEOUT, dm9x_txtimeout, 1, (uint32)dm9x);
   return OK;
 }
 
@@ -840,7 +848,7 @@ static int dm9x_uiptxpoll(struct dm9x_driver_s *dm9x)
 
           if (dm9x->ntxpending > 1 || !dm9x->b100M)
             {
-              return;
+              return OK;
             }
         }
     }
@@ -866,7 +874,7 @@ static int dm9x_uiptxpoll(struct dm9x_driver_s *dm9x)
 
           if (dm9x->ntxpending > 1 || !dm9x->b100M)
             {
-              return;
+              return OK;
             }
         }
     }
@@ -1081,6 +1089,13 @@ static void dm9x_txdone(struct dm9x_driver_s *dm9x)
         }
     }
 
+  /* Cancel the TX timeout */
+
+  if (dm9x->ntxpending == 0)
+    {
+      wd_cancel(dm9x->txtimeout);
+    }
+
   /* Then poll uIP for new XMIT data */
 
   (void)dm9x_uiptxpoll(dm9x);
@@ -1547,7 +1562,8 @@ static void dm9x_bringup(struct dm9x_driver_s *dm9x)
  * Function: dm9x_reset
  *
  * Description:
- *   Stop, reset, re-initialize, and restart the DM90x0 chip and driver
+ *   Stop, reset, re-initialize, and restart the DM90x0 chip and driver.  At
+ *   present, the chip is only reset after a TX timeout.
  *
  * Parameters:
  *   dm9x  - Reference to the driver state structure
@@ -1564,6 +1580,11 @@ static void dm9x_reset(struct dm9x_driver_s *dm9x)
   uint8 save;
   int i;
 
+  /* Cancel the TX poll timer and TX timeout timers */
+
+  wd_cancel(dm9x->txpoll);
+  wd_cancel(dm9x->txtimeout);
+
   /* Save previous register address */
 
   save = (uint8)DM9X_INDEX;
@@ -1648,11 +1669,13 @@ int dm9x_initialize(void)
   /* Initialize the driver structure */
 
   memset(g_dm9x, 0, CONFIG_DM9X_NINTERFACES*sizeof(struct dm9x_driver_s));
+  g_dm9x[0].dev.ifup   = dm9x_ifup;
+  g_dm9x[0].dev.ifdown = dm9x_ifdown;
 
   /* Create a watchdog for timing polling for and timing of transmisstions */
 
-  g_dm9x[0].txpoll    = wd_create();
-  g_dm9x[0].txtimeout = wd_create();
+  g_dm9x[0].txpoll     = wd_create();
+  g_dm9x[0].txtimeout  = wd_create();
 
   /* Read the MAC address */
 
-- 
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