From 0e788f77514cf33b0ff178bc7e72287d9e086ba2 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Mon, 18 Jul 2011 11:09:10 -0700
Subject: usrp2: added fw minor and moved ICMP dest error handling to txrx app

---
 firmware/zpu/apps/txrx_uhd.c  | 39 +++++++++++++++++++++++++++++++--------
 firmware/zpu/lib/net_common.c | 25 +++++--------------------
 2 files changed, 36 insertions(+), 28 deletions(-)

(limited to 'firmware')

diff --git a/firmware/zpu/apps/txrx_uhd.c b/firmware/zpu/apps/txrx_uhd.c
index 37aa43b58..5bf8ca725 100644
--- a/firmware/zpu/apps/txrx_uhd.c
+++ b/firmware/zpu/apps/txrx_uhd.c
@@ -46,27 +46,47 @@
 //virtual registers in the firmware to store persistent values
 static uint32_t fw_regs[8];
 
-extern uint16_t dsp0_dst_port, err0_dst_port, dsp1_dst_port;
-
 static void handle_udp_data_packet(
     struct socket_address src, struct socket_address dst,
     unsigned char *payload, int payload_len
 ){
-    size_t which;
-    switch(dst.port){
+    //handle ICMP destination unreachable
+    if (payload == NULL) switch(src.port){
+    case USRP2_UDP_RX_DSP0_PORT:
+        //the end continuous streaming command
+        sr_rx_ctrl0->cmd = 1 << 31; //no samples now
+        sr_rx_ctrl0->time_secs = 0;
+        sr_rx_ctrl0->time_ticks = 0; //latch the command
+        break;
+
+    case USRP2_UDP_RX_DSP1_PORT:
+        //the end continuous streaming command
+        sr_rx_ctrl1->cmd = 1 << 31; //no samples now
+        sr_rx_ctrl1->time_secs = 0;
+        sr_rx_ctrl1->time_ticks = 0; //latch the command
+        break;
+
+    case USRP2_UDP_TX_DSP0_PORT:
+        //end async update packets per second
+        sr_tx_ctrl->cyc_per_up = 0;
+        break;
+
+    default: return;
+    }
+
+    //handle an incoming UDP packet
+    size_t which = 0;
+    if (payload != 0) switch(dst.port){
     case USRP2_UDP_RX_DSP0_PORT:
         which = 0;
-        dsp0_dst_port = src.port;
         break;
 
     case USRP2_UDP_RX_DSP1_PORT:
         which = 2;
-        dsp1_dst_port = src.port;
         break;
 
     case USRP2_UDP_TX_DSP0_PORT:
         which = 1;
-        err0_dst_port = src.port;
         break;
 
     default: return;
@@ -291,7 +311,10 @@ main(void)
 #endif
   printf("FPGA compatibility number: %d\n", USRP2_FPGA_COMPAT_NUM);
   printf("Firmware compatibility number: %d\n", USRP2_FW_COMPAT_NUM);
-  
+
+  //init readback for firmware minor version number
+  fw_regs[U2_FW_REG_VER_MINOR] = USRP2_FW_VER_MINOR;
+
 #ifdef BOOTLOADER
   //load the production FPGA image or firmware if appropriate
   do_the_bootload_thing();
diff --git a/firmware/zpu/lib/net_common.c b/firmware/zpu/lib/net_common.c
index 2e3257b35..9a3f8c5a5 100644
--- a/firmware/zpu/lib/net_common.c
+++ b/firmware/zpu/lib/net_common.c
@@ -44,9 +44,6 @@ static const size_t out_buff_size = 2048;
 static const eth_mac_addr_t BCAST_MAC_ADDR = {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}};
 #define MAX_UDP_LISTENERS 6
 
-//used in the top level application...
-uint16_t dsp0_dst_port, err0_dst_port, dsp1_dst_port;
-
 /***********************************************************************
  * 16-bit one's complement sum
  **********************************************************************/
@@ -312,25 +309,13 @@ handle_icmp_packet(struct ip_addr src, struct ip_addr dst,
       struct udp_hdr *udp = (struct udp_hdr *)(((char *)ip) + IP_HLEN);
       if (IPH_PROTO(ip) != IP_PROTO_UDP) break;
 
-      if (udp->dest == dsp0_dst_port){
-          //the end continuous streaming command
-          sr_rx_ctrl0->cmd = 1 << 31; //no samples now
-          sr_rx_ctrl0->time_secs = 0;
-          sr_rx_ctrl0->time_ticks = 0; //latch the command
-      }
-      else if (udp->dest == dsp1_dst_port){
-          //the end continuous streaming command
-          sr_rx_ctrl1->cmd = 1 << 31; //no samples now
-          sr_rx_ctrl1->time_secs = 0;
-          sr_rx_ctrl1->time_ticks = 0; //latch the command
-      }
-      else if (udp->dest == err0_dst_port){
-          //end async update packets per second
-          sr_tx_ctrl->cyc_per_up = 0;
+      struct listener_entry *lx = find_listener_by_port(udp->src);
+      if (lx){
+        struct socket_address src = make_socket_address(ip->src, udp->src);
+        struct socket_address dst = make_socket_address(ip->dest, udp->dest);
+        lx->rcvr(src, dst, NULL, 0);
       }
 
-      //struct udp_hdr *udp = (struct udp_hdr *)((char *)icmp + 28);
-      //printf("icmp port unr %d\n", udp->dest);
       putchar('i');
     }
     else {
-- 
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