OctoClock firmware upgrade, added host driver

* OctoClock can communicate with UHD over Ethernet
* Can read NMEA strings from GPSDO and send to host
* Added multi_usrp_clock class for clock devices
* uhd::device can now filter to return only USRP devices or clock devices
* New OctoClock bootloader can accept firmware download over Ethernet
* Added octoclock_burn_eeprom,octoclock_firmware_burner utilities
* Added test_clock_synch example to show clock API

1 files changed, 98 insertions, 0 deletions

diff --git a/firmware/octoclock/include/network.h b/firmware/octoclock/include/network.h
new file mode 100644
index 000000000..69c1dcf42
--- /dev/null
+++ b/firmware/octoclock/include/network.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2009-2012,2014 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef INCLUDED_NETWORK_H
+#define INCLUDED_NETWORK_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include <octoclock.h>
+#include <net/socket_address.h>
+#include <net/eth_mac_addr.h>
+
+#include "octoclock/common.h"
+
+/*
+ * Without its own HTON[LS] included in this build,
+ * some of lwIP's #defines do nothing.
+ * These are substitutions with our own HTON[LS].
+ */
+#define htons(n) (((((uint16_t)(n) & 0xFF)) << 8) | (((uint16_t)(n) & 0xFF00) >> 8))
+#define ntohs(n) htons(n)
+
+#define htonl(n) (((((uint32_t)(n) & 0xFF)) << 24) | \
+                  ((((uint32_t)(n) & 0xFF00)) << 8) | \
+                  ((((uint32_t)(n) & 0xFF0000)) >> 8) | \
+                  ((((uint32_t)(n) & 0xFF000000)) >> 24))
+
+#define ntohl(n) htonl(n)
+
+#define _IP(a,b,c,d) (((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | ((uint32_t)d << 0))
+#define _IPH_V(hdr) (ntohs((hdr)->_v_hl_tos) >> 12)
+#define _IPH_HL(hdr) ((ntohs((hdr)->_v_hl_tos) >> 8) & 0x0f)
+#define _IPH_TOS(hdr) (ntohs((hdr)->_v_hl_tos) & 0xff)
+#define _IPH_LEN(hdr) (ntohs((hdr)->_len))
+#define _IPH_ID(hdr) (ntohs((hdr)->_id))
+#define _IPH_OFFSET(hdr) (ntohs((hdr)->_offset))
+#define _IPH_TTL(hdr) (ntohs((hdr)->_ttl_proto) >> 8)
+#define _IPH_PROTO(hdr) (ntohs((hdr)->_ttl_proto) & 0xff)
+#define _IPH_CHKSUM(hdr) (ntohs((hdr)->_chksum))
+
+#define _IPH_VHLTOS_SET(hdr, v, hl, tos) (hdr)->_v_hl_tos = (htons(((v) << 12) | ((hl) << 8) | (tos)))
+#define _IPH_LEN_SET(hdr, len) (hdr)->_len = (htons(len))
+#define _IPH_ID_SET(hdr, id) (hdr)->_id = (id)
+#define _IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off)
+#define _IPH_TTL_SET(hdr, ttl) (hdr)->_ttl_proto = (htons(_IPH_PROTO(hdr) | ((u16_t)(ttl) << 8)))
+#define _IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (htons((proto) | (_IPH_TTL(hdr) << 8)))
+#define _IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
+
+// Global network values
+eth_mac_addr_t octoclock_mac_addr;
+struct ip_addr octoclock_ip_addr;
+struct ip_addr octoclock_dr_addr;
+struct ip_addr octoclock_netmask;
+
+// Ethernet I/O buffers
+uint8_t buf_in[512];
+uint8_t buf_out[512];
+
+// Default values loaded if EEPROM is incomplete
+static const uint32_t blank_eeprom_ip = _IP(255,255,255,255);
+static const uint32_t default_ip      = _IP(192,168,10,3);
+static const uint32_t default_dr      = _IP(192,168,10,1);
+static const uint32_t default_netmask = _IP(255,255,255,0);
+
+static const uint8_t blank_eeprom_mac[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+static const uint8_t default_mac[6] = {0x00, 0x80, 0x2F, 0x11, 0x22, 0x33};
+
+typedef void (*udp_receiver_t)(struct socket_address src, struct socket_address dst,
+			       unsigned char *payload, int payload_len);
+
+void init_udp_listeners(void);
+
+void register_addrs(const eth_mac_addr_t *mac_addr, const struct ip_addr *ip_addr);
+
+void register_udp_listener(int port, udp_receiver_t rcvr);
+
+void send_udp_pkt(int src_port, struct socket_address dst,
+		  const void *buf, size_t len);
+
+void handle_eth_packet(size_t recv_len);
+
+void network_init(void);
+
+#endif /* INCLUDED_NETWORK_H */