Merge branch 'usrp2p_udpfw' of ettus.sourcerepo.com:ettus/uhdpriv into usrp2p

12 files changed, 230 insertions, 411 deletions

diff --git a/firmware/microblaze/Makefile.common b/firmware/microblaze/Makefile.common
index ceb6a553a..4e726edab 100644
--- a/firmware/microblaze/Makefile.common
+++ b/firmware/microblaze/Makefile.common
@@ -59,8 +59,13 @@ COMMON_LFLAGS = \
 ########################################################################
 # Common stuff for building top level microblaze images
 ########################################################################
+#we use COMMON_IHX_ARGS to relocate the reset and interrupt vectors to
+#just below the start of code. upon creating the BIN, any leading padding
+#is thrown out, so the .bin file is valid for uploading to USRP2P. this 
+#does not affect USRP2 because the USRP2 already starts at 0x0000, and
+#because the relocate_args are not defined for USRP2's Makefile.am.
 .elf.bin:
-	$(MB_OBJCOPY) -O binary $< $@
+	$(MB_OBJCOPY) -O binary $(RELOCATE_ARGS) $< $@
 
 .elf.dump:
 	$(MB_OBJDUMP) -DSC $< > $@
@@ -69,7 +74,7 @@ COMMON_LFLAGS = \
 	$(HEXDUMP) -v -e'1/1 "%.2X\n"' $< > $@
 
 .elf.ihx:
-	$(MB_OBJCOPY) -O ihex $(COMMON_IHX_ARGS) $< $@
+	$(MB_OBJCOPY) -O ihex $(RELOCATE_ARGS) $< $@
 
 _generated_from_elf = \
 	$(noinst_PROGRAMS:.elf=.map) \
diff --git a/firmware/microblaze/apps/txrx_uhd.c b/firmware/microblaze/apps/txrx_uhd.c
index 1c6e0624f..44be2cc9c 100644
--- a/firmware/microblaze/apps/txrx_uhd.c
+++ b/firmware/microblaze/apps/txrx_uhd.c
@@ -45,6 +45,7 @@
 #include <i2c.h>
 #include <ethertype.h>
 #include <arp_cache.h>
+#include "udp_fw_update.h"
 
 /*
  * Full duplex Tx and Rx between ethernet and DSP pipelines
@@ -509,6 +510,7 @@ main(void)
 
   register_udp_listener(USRP2_UDP_CTRL_PORT, handle_udp_ctrl_packet);
   register_udp_listener(USRP2_UDP_DATA_PORT, handle_udp_data_packet);
+  register_udp_listener(USRP2_UDP_UPDATE_PORT, handle_udp_fw_update_packet);
 
   // initialize double buffering state machine for ethernet -> DSP Tx
 
diff --git a/firmware/microblaze/lib/loader_parser.c b/firmware/microblaze/lib/loader_parser.c
deleted file mode 100644
index 96457a164..000000000
--- a/firmware/microblaze/lib/loader_parser.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2009 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/>.
- */
-
-#include "loader_parser.h"
-#include <quadradio/loader_bits.h>
-#include <quadradio/flashdir.h>
-#include <quadradio/simple_binary_format.h>
-#include <spi_flash.h>
-#include <nonstdio.h>
-//#include <assert.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
-#include "ethernet.h"
-#include "qr_settings.h"
-
-#define min(a,b) ((a) < (b) ? (a) : (b))
-
-static spi_flash_async_state_t async_state;
-
-
-static caldiv_eeprom_setter_t _caldiv_set_rev = NULL;
-static caldiv_eeprom_setter_t _caldiv_set_ser = NULL;
-static caldiv_eeprom_setter_t _caldiv_set_mod = NULL;
-
-void
-register_caldiv_eeprom_setters(caldiv_eeprom_setter_t set_rev,
-			       caldiv_eeprom_setter_t set_ser,
-			       caldiv_eeprom_setter_t set_mod)
-{
-  _caldiv_set_rev = set_rev;
-  _caldiv_set_ser = set_ser;
-  _caldiv_set_mod = set_mod;
-}
-
-
-// big-endian
-static uint32_t 
-get32(const unsigned char *s)
-{
-  return (s[0] << 24) | (s[1] << 16) | (s[2] << 8) | s[3];
-}
-
-// big-endian
-static unsigned char *
-put32(unsigned char *s, uint32_t v)
-{
-  s[0] = (v >> 24) & 0xff;
-  s[1] = (v >> 16) & 0xff;
-  s[2] = (v >>  8) & 0xff;
-  s[3] = v & 0xff;
-  return s + 4;
-}
-
-static bool
-erased_p(uint32_t flash_addr, size_t nbytes)
-{
-  unsigned char	buf[64];
-
-  size_t n;
-  for (size_t i = 0; i < nbytes; i += n, flash_addr += n){
-    n = min(nbytes - i, sizeof(buf));
-    spi_flash_read(flash_addr, n, buf);
-    for (size_t j = 0; j < n; j++)
-      if (buf[j] != 0xff)
-	return false;
-  }
-  return true;
-}
-
-static bool
-erase_flash(uint32_t addr, uint32_t len)
-{
-  if (addr % spi_flash_sector_size() != 0)
-    return false;
-
-  if (len % spi_flash_sector_size() != 0)
-    return false;
-
-  spi_flash_async_erase_start(&async_state, addr, len);
-  // FIXME? check to see if erase was successful
-  return true;
-}
-
-static bool
-map_slot(uint32_t slot, uint32_t *slot_start, uint32_t *slot_len, uint32_t *status)
-{
-  // This case doesn't require a valid flashdir, and in fact can be used as 
-  // part of writing the intial flashdir.
-  if (QLD_SLOT_DOM(slot) == QLD_DOM_UNMAPPED){
-    int flash_size = get_flash_size();
-    if (flash_size == 0){
-      *status = QLDS_FAILED;	// Can't find the flash.  most likely a h/w problem.
-      return false;
-    }
-    *slot_start = 0;
-    *slot_len = flash_size;
-    return true;
-  }
-
-  const struct flashdir *fd = get_flashdir();
-  if (fd == 0)
-    return false;
-
-  uint32_t slot_num = QLD_SLOT_NUM(slot);
-
-  switch(QLD_SLOT_DOM(slot)){
-  case QLD_DOM_FPGA:
-    if (slot_num >= fd->fpga_nslots){
-      *status = QLDS_INVALID_ARG;
-      return false;
-    }
-    *slot_start = fd->slot[slot_num + fd->fpga_slot0].start << spi_flash_log2_sector_size();
-    *slot_len = fd->slot[slot_num + fd->fpga_slot0].len << spi_flash_log2_sector_size();
-    return true;
-
-  case QLD_DOM_FW:
-    if (slot_num >= fd->fw_nslots){
-      *status = QLDS_INVALID_ARG;
-      return false;
-    }
-    *slot_start = fd->slot[slot_num + fd->fw_slot0].start << spi_flash_log2_sector_size();
-    *slot_len = fd->slot[slot_num + fd->fw_slot0].len << spi_flash_log2_sector_size();
-    return true;
-
-  default:
-    *status = QLDS_INVALID_ARG;
-    return false;
-  }
-}
-
-
-static bool
-check_flashdir(void)
-{
-  return get_flashdir() != 0;
-}
-
-void
-loader_parser(const unsigned char *input, size_t ilen,
-	      unsigned char *output, size_t max_olen, size_t *actual_olen)
-{
-  //assert (max_olen >= 8);
-  if (!(max_olen >= 8))
-    abort();
-
-  *actual_olen = 0;
-  uint32_t status = QLDS_BAD_PKT;
-
-  uint32_t cmd = get32(input);
-  uint32_t nonce = get32(input+4);
-  uint32_t slot = 0;
-  uint32_t addr = 0;
-  uint32_t len = 0;
-
-  if (ilen < 8){
-    nonce = -1;
-    goto done;
-  }
-
-  uint32_t slot_start;		// offset in flash
-  uint32_t slot_len;		// length in bytes
-  
-  if (ilen >= 5 * sizeof(uint32_t)){
-    slot = get32(input+8);
-    addr = get32(input+12);
-    len = get32(input+16);
-  }
-
-  switch (cmd){
-  case QLD_FLASH_ERASE_START:
-    // <QLD_FLASH_ERASE_START> <nonce> <slot> <addr> <len>
-    if (ilen != 5 * sizeof(uint32_t))
-      goto done;
-
-    if (!check_flashdir()){
-      status = QLDS_BAD_FLASHDIR;
-      goto done;
-    }
-    if (!map_slot(slot, &slot_start, &slot_len, &status))
-      goto done;
-
-    if (QLD_SLOT_DOM(slot) != QLD_DOM_UNMAPPED){
-      addr = slot_start;
-      len = slot_len;
-    }
-    //printf("flash_erase: addr = 0x%x, len=0x%x\n", addr, len);
-
-    if (0 && erased_p(addr, len)){	// already erased?
-      async_state.first = async_state.last = async_state.current = 0;
-      goto ok;
-    }
-
-    if (erase_flash(addr, len))
-      goto ok;
-
-    status = QLDS_FAILED;
-    goto done;
-    
-
-  case QLD_FLASH_ERASE_POLL:
-    // <QLD_FLASH_ERASE_POLL> <nonce>
-    if (ilen != 2 * sizeof(uint32_t))
-      goto done;
-
-    if (spi_flash_async_erase_poll(&async_state))
-      goto ok;
-
-    status = QLDS_BUSY;
-    goto done;
-
-
-  case QLD_FLASH_WRITE:
-    // <QLD_FLASH_WRITE> <nonce> <slot> <addr> <len> <data ...>
-    if (ilen < 5 * sizeof(uint32_t))
-      goto done;
-
-    if (ilen != 5 * sizeof(uint32_t) + len)
-      goto done;
-
-    if (!check_flashdir()){
-      status = QLDS_BAD_FLASHDIR;
-      goto done;
-    }
-    if (!map_slot(slot, &slot_start, &slot_len, &status))
-      goto done;
-
-    addr += slot_start;
-    len = min(len, slot_len);
-
-    if (spi_flash_program(addr, len, &input[5*sizeof(uint32_t)]))
-      goto ok;
-
-    status = QLDS_FAILED;
-    goto done;
-    
-
-  case QLD_FLASH_READ:
-  case QLD_MEM_READ:
-  case QLD_MEM_WRITE:
-  case QLD_GOTO:
-    status = QLDS_NOTIMPLEMENTED;
-    goto done;
-
-  case QLD_PING:
-    // <QLD_PING> <nonce>
-    if (ilen != 2 * sizeof(uint32_t))
-      goto done;
-    goto ok;
-
-#if 0
-  case QLD_EEPROM_SET_XXX:
-  // <QLD_EEPROM_SET_XXX> <nonce> <arg> <idlen> <idstr> <data ...>
-  {
-    uint32_t arg    = get32(input+2*sizeof(uint32_t));
-    uint32_t idlen  = get32(input+3*sizeof(uint32_t));
-    uint8_t *idstr  = (uint8_t*)input+4*sizeof(uint32_t);
-    uint8_t *data_p = idstr+idlen;
-    
-    //handle the ethernet cases
-    if (strncmp((char*)idstr, "ip", idlen) == 0){
-        struct ip_addr addr = {get32(data_p)};
-        ethernet_set_ip_addr(arg, addr);
-    }
-    else if (strncmp((char*)idstr, "mac", idlen) == 0){
-        eth_mac_addr_t addr;
-        memcpy(&addr, data_p, sizeof(addr));
-        ethernet_set_mac_addr(arg, &addr);
-    }
-    //handle the main board eeprom
-    else if (strncmp((char*)idstr, "qrrev", idlen) == 0){
-        qr_set_revision(get32(data_p));
-    }
-    else if (strncmp((char*)idstr, "qrser", idlen) == 0){
-        qr_set_serial(get32(data_p));
-    }
-    else if (strncmp((char*)idstr, "qrmod", idlen) == 0){
-        qr_set_model(get32(data_p));
-    }
-    //handle the caldiv eeprom
-    else if (strncmp((char*)idstr, "cdrev", idlen) == 0){
-        if (_caldiv_set_rev) _caldiv_set_rev(get32(data_p));
-    }
-    else if (strncmp((char*)idstr, "cdser", idlen) == 0){
-        if (_caldiv_set_ser) _caldiv_set_ser(get32(data_p));
-    }
-    else if (strncmp((char*)idstr, "cdmod", idlen) == 0){
-        if (_caldiv_set_ser) _caldiv_set_mod(get32(data_p));
-    }
-    else {
-        goto done;
-    }
-  }
-  goto ok;
-#endif
-
-  default:
-    status = QLDS_UNKNOWN_CMD;
-    goto done;
-  }
-
- ok:
-  status = QLDS_OK;
-
- done:
-  put32(output, nonce);
-  put32(output+4, status);
-  *actual_olen = 2*sizeof(uint32_t);
-}
diff --git a/firmware/microblaze/lib/loader_parser.h b/firmware/microblaze/lib/loader_parser.h
deleted file mode 100644
index 365317bd7..000000000
--- a/firmware/microblaze/lib/loader_parser.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2009 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/>.
- */
-
-#include <stddef.h>
-#include <stdint.h>
-
-/*
- * max_olen must be at least 8 bytes.  1KB is recommended.
- */
-void
-loader_parser(const unsigned char *input, size_t ilen,
-	      unsigned char *output, size_t max_olen, size_t *actual_olen);
-
-/*
- * Major kludge-master altert!
- * This function registers functions for setting caldiv eeprom stuff.
- * This way, the parser does not depend on the qpn apps at compile time.
- */
-typedef void(*caldiv_eeprom_setter_t)(uint32_t);
-void register_caldiv_eeprom_setters(
-	caldiv_eeprom_setter_t set_rev,
-	caldiv_eeprom_setter_t set_ser,
-	caldiv_eeprom_setter_t set_mod);
diff --git a/firmware/microblaze/lib/udp_burner_packet.h b/firmware/microblaze/lib/udp_burner_packet.h
deleted file mode 100644
index 0f4025712..000000000
--- a/firmware/microblaze/lib/udp_burner_packet.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2009 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_UDP_BURNER_PACKET_H
-#define INCLUDED_UDP_BURNER_PACKET_H
-
-#include <net/socket_address.h>
-
-void
-handle_udp_burner_packet(struct socket_address src, struct socket_address dst,
-			 unsigned char *payload, int payload_len);
-
-
-#endif /* INCLUDED_UDP_BURNER_PACKET_H */
diff --git a/firmware/microblaze/lib/udp_fw_update.h b/firmware/microblaze/lib/udp_fw_update.h
new file mode 100644
index 000000000..d25525bd2
--- /dev/null
+++ b/firmware/microblaze/lib/udp_fw_update.h
@@ -0,0 +1,71 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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/>.
+ */
+
+#include "net_common.h"
+
+#define USRP2_UDP_UPDATE_PORT 49154
+
+typedef enum {
+  USRP2_FW_UPDATE_ID_WAT = ' ',
+
+  USRP2_FW_UPDATE_ID_OHAI_LOL = 'a',
+  USRP2_FW_UPDATE_ID_OHAI_OMG = 'A',
+
+  USRP2_FW_UPDATE_ID_WATS_TEH_FLASH_INFO_LOL = 'f',
+  USRP2_FW_UPDATE_ID_HERES_TEH_FLASH_INFO_OMG = 'F',
+
+  USRP2_FW_UPDATE_ID_ERASE_TEH_FLASHES_LOL = 'e',
+  USRP2_FW_UPDATE_ID_ERASING_TEH_FLASHES_OMG = 'E',
+
+  USRP2_FW_UPDATE_ID_R_U_DONE_ERASING_LOL = 'd',
+  USRP2_FW_UPDATE_ID_IM_DONE_ERASING_OMG = 'D',
+  USRP2_FW_UPDATE_ID_NOPE_NOT_DONE_ERASING_OMG = 'B',
+
+  USRP2_FW_UPDATE_ID_WRITE_TEH_FLASHES_LOL = 'w',
+  USRP2_FW_UPDATE_ID_WROTE_TEH_FLASHES_OMG = 'W',
+
+  USRP2_FW_UPDATE_ID_READ_TEH_FLASHES_LOL = 'r',
+  USRP2_FW_UPDATE_ID_KK_READ_TEH_FLASHES_OMG = 'R',
+
+  USRP2_FW_UPDATE_ID_RESET_MAH_COMPUTORZ_LOL = 's',
+  USRP2_FW_UPDATE_ID_RESETTIN_TEH_COMPUTORZ_OMG = 'S',
+
+  USRP2_FW_UPDATE_ID_KTHXBAI = '~'
+
+} usrp2_fw_update_id_t;
+
+typedef struct {
+  uint32_t proto_ver;
+  uint32_t id;
+  uint32_t seq;
+  union {
+      uint32_t ip_addr;
+    struct {
+      uint32_t flash_addr;
+      uint32_t length;
+      uint8_t  data[256];
+    } flash_args;
+    struct {
+      uint32_t sector_size_bytes;
+      uint32_t memory_size_bytes;
+    } flash_info_args;
+  } data;
+} usrp2_fw_update_data_t;
+
+void handle_udp_fw_update_packet(struct socket_address src, struct socket_address dst,
+                                 unsigned char *payload, int payload_len);
diff --git a/firmware/microblaze/usrp2/Makefile.am b/firmware/microblaze/usrp2/Makefile.am
index 8da013980..17f7a4744 100644
--- a/firmware/microblaze/usrp2/Makefile.am
+++ b/firmware/microblaze/usrp2/Makefile.am
@@ -34,7 +34,8 @@ noinst_LIBRARIES = libusrp2.a
 libusrp2_a_SOURCES = \
 	$(COMMON_SRCS) \
 	sd.c \
-	ethernet.c
+	ethernet.c \
+  udp_fw_update.c
 
 noinst_PROGRAMS = \
 	usrp2_txrx_uhd.elf
diff --git a/firmware/microblaze/lib/udp_burner_packet.c b/firmware/microblaze/usrp2/udp_fw_update.c
index d86a4cf4a..14eb0b1ee 100644
--- a/firmware/microblaze/lib/udp_burner_packet.c
+++ b/firmware/microblaze/usrp2/udp_fw_update.c
@@ -1,6 +1,6 @@
 /* -*- c++ -*- */
 /*
- * Copyright 2009 Ettus Research LLC
+ * Copyright 2010 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
@@ -16,23 +16,19 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "udp_burner_packet.h"
+//Routines to handle updating the SPI Flash firmware via UDP
+
 #include "net_common.h"
-#include "loader_parser.h"
-#include <stdint.h>
-#include <compiler.h>
+#include "usrp2/fw_common.h"
 #include <nonstdio.h>
+#include "udp_fw_update.h"
+
+//Firmware update packet handler
+void handle_udp_fw_update_packet(struct socket_address src, struct socket_address dst,
+                                 unsigned char *payload, int payload_len) {
 
+  usrp2_fw_update_data_t update_data_out;
+  update_data_out.id = USRP2_FW_UPDATE_ID_WAT;
 
-void
-handle_udp_burner_packet(struct socket_address src, struct socket_address dst,
-			 unsigned char *payload, int payload_len)
-{
-  unsigned char reply[128] _AL4;
-  size_t actual_reply_len;
-  loader_parser(payload, payload_len, reply, sizeof(reply), &actual_reply_len);
-  send_udp_pkt(dst.port, src, reply, actual_reply_len);
+  send_udp_pkt(USRP2_UDP_UPDATE_PORT, src, &update_data_out, sizeof(update_data_out));
 }
diff --git a/firmware/microblaze/usrp2p/Makefile.am b/firmware/microblaze/usrp2p/Makefile.am
index ddc7006ca..e6bff2dbc 100644
--- a/firmware/microblaze/usrp2p/Makefile.am
+++ b/firmware/microblaze/usrp2p/Makefile.am
@@ -27,11 +27,12 @@ AM_LDFLAGS = \
 	-Wl,-defsym -Wl,_STACK_SIZE=3072
 
 #all of this here is to relocate the hardware vectors to somewhere normal.
-COMMON_IHX_ARGS = \
+RELOCATE_ARGS = \
 	--change-section-address .vectors.sw_exception+0x8000 \
 	--change-section-address .vectors.hw_exception+0x8000 \
 	--change-section-address .vectors.interrupt+0x8000 \
 	--change-section-address .vectors.reset+0x8000
+
 #	$(MB_OBJCOPY) -O ihex $< $@
 # the below would work if objcopy weren't written by apes
 #	$(MB_OBJCOPY) -O ihex -w --change-section-address .vectors*+0x8000 $< $@
@@ -49,7 +50,8 @@ libusrp2p_a_SOURCES = \
 	spi_flash.c \
 	spi_flash_read.c \
 	bootloader_utils.c \
-	ethernet.c
+	ethernet.c \
+  udp_fw_update.c
 
 noinst_PROGRAMS = \
 	usrp2p_txrx_uhd.elf \
diff --git a/firmware/microblaze/usrp2p/spi_flash.h b/firmware/microblaze/usrp2p/spi_flash.h
index f65f28477..bbe7b650d 100644
--- a/firmware/microblaze/usrp2p/spi_flash.h
+++ b/firmware/microblaze/usrp2p/spi_flash.h
@@ -31,6 +31,7 @@
 uint32_t spi_flash_rdid(void);	/* Read ID */
 uint32_t spi_flash_rdsr(void);	/* Read Status Register */
 size_t spi_flash_log2_sector_size(void) __attribute__((pure));  /* either 16 or 18 */
+size_t spi_flash_log2_memory_size(void);
 
 static inline size_t
 spi_flash_sector_size(void)
@@ -38,6 +39,12 @@ spi_flash_sector_size(void)
   return ((size_t) 1) << spi_flash_log2_sector_size();
 }
 
+static inline size_t
+spi_flash_memory_size(void)
+{
+  return ((size_t) 1) << spi_flash_log2_memory_size();
+}
+
 void spi_flash_read(uint32_t flash_addr,  size_t nbytes, void *buf);
 
 /*
diff --git a/firmware/microblaze/usrp2p/spi_flash_read.c b/firmware/microblaze/usrp2p/spi_flash_read.c
index 1c65350f7..4682c5fe6 100644
--- a/firmware/microblaze/usrp2p/spi_flash_read.c
+++ b/firmware/microblaze/usrp2p/spi_flash_read.c
@@ -20,6 +20,8 @@
 #include "spi_flash_private.h"
 #include <stdlib.h>		// abort
 
+static size_t _spi_flash_log2_memory_size;
+
 uint32_t 
 spi_flash_rdid(void)
 {
@@ -48,9 +50,26 @@ spi_flash_log2_sector_size(void)
   };
 
   _spi_flash_log2_sector_size = log2_sector_size[size - 22];
+  _spi_flash_log2_memory_size = size; //while we're at it
   return _spi_flash_log2_sector_size;
 }
 
+size_t
+spi_flash_log2_memory_size(void)
+{
+  if (_spi_flash_log2_memory_size != 0)
+    return _spi_flash_log2_memory_size;
+
+  uint32_t id = spi_flash_rdid();
+  int type = (id >> 8) & 0xff;
+  int size = id & 0xff;
+  if (type != 0x20 || size < 22 || size > 24)
+    abort();
+
+  _spi_flash_log2_memory_size = size;
+  return _spi_flash_log2_memory_size;
+}
+
 void 
 spi_flash_read(uint32_t flash_addr,  size_t nbytes, void *buf)
 {
diff --git a/firmware/microblaze/usrp2p/udp_fw_update.c b/firmware/microblaze/usrp2p/udp_fw_update.c
new file mode 100644
index 000000000..9242242e7
--- /dev/null
+++ b/firmware/microblaze/usrp2p/udp_fw_update.c
@@ -0,0 +1,106 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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/>.
+ */
+
+//Routines to handle updating the SPI Flash firmware via UDP
+
+#include <net_common.h>
+#include "usrp2/fw_common.h"
+#include "spi.h"
+#include "spi_flash.h"
+#include <nonstdio.h>
+#include <string.h>
+#include "ethernet.h"
+#include "udp_fw_update.h"
+
+//Firmware update packet handler
+void handle_udp_fw_update_packet(struct socket_address src, struct socket_address dst,
+                                 unsigned char *payload, int payload_len) {
+
+  const usrp2_fw_update_data_t *update_data_in = (usrp2_fw_update_data_t *) payload;
+
+  usrp2_fw_update_data_t update_data_out;
+  usrp2_fw_update_id_t update_data_in_id = update_data_in->id;
+
+  //ensure that the protocol versions match
+  if (payload_len >= sizeof(uint32_t) && update_data_in->proto_ver != USRP2_FW_COMPAT_NUM){
+    printf("!Error in update packet handler: Expected compatibility number %d, but got %d\n",
+        USRP2_FW_COMPAT_NUM, update_data_in->proto_ver
+      );
+      update_data_in_id = USRP2_FW_UPDATE_ID_OHAI_LOL; //so we can respond
+  }
+
+  //ensure that this is not a short packet
+  if (payload_len < sizeof(usrp2_fw_update_data_t)){
+      printf("!Error in update packet handler: Expected payload length %d, but got %d\n",
+          (int)sizeof(usrp2_fw_update_data_t), payload_len
+      );
+      update_data_in_id = USRP2_FW_UPDATE_ID_WAT;
+  }
+
+  spi_flash_async_state_t spi_flash_async_state;
+
+  switch(update_data_in_id) {
+  case USRP2_FW_UPDATE_ID_OHAI_LOL: //why hello there you handsome devil
+    update_data_out.id = USRP2_FW_UPDATE_ID_OHAI_OMG;
+    memcpy(&update_data_out.data.ip_addr, (void *)get_ip_addr(), sizeof(struct ip_addr));
+    break;
+
+  case USRP2_FW_UPDATE_ID_WATS_TEH_FLASH_INFO_LOL: //query sector size, memory size so the host can mind the boundaries
+    update_data_out.data.flash_info_args.sector_size_bytes = spi_flash_sector_size();
+    update_data_out.data.flash_info_args.memory_size_bytes = spi_flash_memory_size();
+    update_data_out.id = USRP2_FW_UPDATE_ID_HERES_TEH_FLASH_INFO_OMG;
+    break;
+
+  case USRP2_FW_UPDATE_ID_ERASE_TEH_FLASHES_LOL: //out with the old
+    spi_flash_async_erase_start(&spi_flash_async_state, update_data_in->data.flash_args.flash_addr, update_data_in->data.flash_args.length);
+    update_data_out.id = USRP2_FW_UPDATE_ID_ERASING_TEH_FLASHES_OMG;
+    break;
+
+  case USRP2_FW_UPDATE_ID_R_U_DONE_ERASING_LOL:
+    //poll for done, set something in the reply packet
+    //spi_flash_async_erase_poll() also advances the state machine, so you should call it reasonably often to get things done quicker
+    if(spi_flash_async_erase_poll(&spi_flash_async_state)) update_data_out.id = USRP2_FW_UPDATE_ID_IM_DONE_ERASING_OMG;
+    else update_data_out.id = USRP2_FW_UPDATE_ID_NOPE_NOT_DONE_ERASING_OMG;
+    break;
+
+  case USRP2_FW_UPDATE_ID_WRITE_TEH_FLASHES_LOL: //and in with the new
+    //spi_flash_program() goes pretty quick compared to page erases, so we don't bother polling -- it'll come back in some milliseconds
+    //if it doesn't come back fast enough, we'll just write smaller packets at a time until it does
+    spi_flash_program(update_data_in->data.flash_args.flash_addr, update_data_in->data.flash_args.length, update_data_in->data.flash_args.data);
+    update_data_out.id = USRP2_FW_UPDATE_ID_WROTE_TEH_FLASHES_OMG;
+    break;
+
+  case USRP2_FW_UPDATE_ID_READ_TEH_FLASHES_LOL: //for verify
+    spi_flash_read(update_data_in->data.flash_args.flash_addr,  update_data_in->data.flash_args.length, update_data_out.data.flash_args.data);
+    update_data_out.id = USRP2_FW_UPDATE_ID_KK_READ_TEH_FLASHES_OMG;
+    break;
+
+  case USRP2_FW_UPDATE_ID_RESET_MAH_COMPUTORZ_LOL: //for if we ever get the ICAP working
+    //should reset via icap_reload_fpga(uint32_t flash_address);
+    update_data_out.id = USRP2_FW_UPDATE_ID_RESETTIN_TEH_COMPUTORZ_OMG;
+    //you should note that if you get a reply packet to this the reset has obviously failed
+    break;
+
+//  case USRP2_FW_UPDATE_ID_KTHXBAI: //see ya
+//    break;
+
+  default: //uhhhh
+    update_data_out.id = USRP2_FW_UPDATE_ID_WAT;
+  }
+  send_udp_pkt(USRP2_UDP_UPDATE_PORT, src, &update_data_out, sizeof(update_data_out));
+}