Merged r9433:9527 from features/gr-usrp2 into trunk. Adds usrp2 and gr-usrp2 top-level components. Trunk passes distcheck with mb-gcc installed, but currently not without them. The key issue is that when mb-gcc is not installed, the build system skips over the usrp2/firmware directory, and the firmware include files don't get put into the dist tarball. But we can't do the usual DIST_SUBDIRS method as the firmware is a subpackage.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9528 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 230 insertions, 0 deletions

diff --git a/usrp2/firmware/apps/eth_serdes.c b/usrp2/firmware/apps/eth_serdes.c
new file mode 100644
index 000000000..c47b8ebd0
--- /dev/null
+++ b/usrp2/firmware/apps/eth_serdes.c
@@ -0,0 +1,230 @@
+/*
+ * Copyright 2007,2008 Free Software Foundation, Inc.
+ *
+ * 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/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "u2_init.h"
+#include "memory_map.h"
+#include "spi.h"
+#include "hal_io.h"
+#include "buffer_pool.h"
+#include "pic.h"
+#include "bool.h"
+#include "ethernet.h"
+#include "nonstdio.h"
+#include "usrp2_eth_packet.h"
+#include "dbsm.h"
+#include "app_passthru_v2.h"
+#include "memcpy_wa.h"
+#include "clocks.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#define FW_SETS_SEQNO	1	// define to 0 or 1 (FIXME must be 1 for now)
+
+#if (FW_SETS_SEQNO)
+static int fw_seqno __attribute__((unused));	// used when f/w is filling in sequence numbers
+#endif
+
+
+/*
+ * Full duplex Tx and Rx between ethernet and serdes
+ *
+ * Buffer 1 is used by the cpu to send frames to the host.
+ * Buffers 2 and 3 are used to double-buffer the DSP Rx to eth flow
+ * Buffers 4 and 5 are used to double-buffer the eth to DSP Tx  eth flow
+ */
+//#define CPU_RX_BUF	0	// eth -> cpu
+
+#define	DSP_RX_BUF_0	2	// serdes -> eth (double buffer)
+#define	DSP_RX_BUF_1	3	// serdes -> eth
+#define	DSP_TX_BUF_0	4	// eth -> serdes (double buffer)
+#define	DSP_TX_BUF_1	5	// eth -> serdes
+
+/*
+ * ================================================================
+ *   configure serdes double buffering state machine (eth -> serdes)
+ * ================================================================
+ */
+
+
+// Receive from ethernet
+buf_cmd_args_t dsp_tx_recv_args = {
+  PORT_ETH,
+  0,
+  BP_LAST_LINE
+};
+
+// send to serdes
+buf_cmd_args_t dsp_tx_send_args = {
+  PORT_SERDES,
+  0,
+  0			// filled in from last_line register
+};
+
+dbsm_t dsp_tx_sm;	// the state machine
+
+/*
+ * ====================================================================
+ *   configure serdes RX double buffering state machine (serdes -> eth)
+ * ====================================================================
+ */
+
+// receive from serdes
+buf_cmd_args_t dsp_rx_recv_args = {
+  PORT_SERDES,
+  0,
+  BP_LAST_LINE
+};
+
+// send to ETH
+buf_cmd_args_t dsp_rx_send_args = {
+  PORT_ETH,
+  0,		// starts with ethernet header in line 0
+  0,		// filled in from list_line register
+};
+
+dbsm_t dsp_rx_sm;	// the state machine
+
+
+// The mac address of the host we're sending to.
+u2_mac_addr_t host_mac_addr;
+
+
+// ----------------------------------------------------------------
+
+
+#if (FW_SETS_SEQNO)
+/*
+ * Debugging ONLY.  This will be handled by the tx_protocol_engine.
+ *
+ * This is called when the DSP Rx chain has filled in a packet.
+ * We set and increment the seqno, then return false, indicating
+ * that we didn't handle the packet.  A bit of a kludge
+ * but it should work.
+ */
+
+bool 
+fw_sets_seqno_inspector(dbsm_t *sm, int buf_this)	// returns false
+{
+#if 0
+  uint32_t *p = buffer_ram(buf_this);
+  uint32_t last_line = buffer_pool_status->last_line[buf_this] - sm->last_line_adj;
+  printf("fw_sets_seqno_inspector: buf_this = %d, last_line = %d\n",
+	 buf_this, last_line);
+
+  print_buffer(p, (last_line + 1));
+#endif
+
+#if 0
+  uint32_t *p = buffer_ram(buf_this);
+  uint32_t seqno = fw_seqno++;
+
+  // KLUDGE all kinds of nasty magic numbers and embedded knowledge
+  uint32_t t = p[4];
+  t = (t & 0xffff00ff) | ((seqno & 0xff) << 8);
+  p[4] = t;
+#endif
+
+  return false;		// we didn't handle the packet
+}
+#endif
+
+
+inline static void
+buffer_irq_handler(unsigned irq)
+{
+  uint32_t  status = buffer_pool_status->status;
+
+  if (0 && (status & ~BPS_IDLE_ALL)){
+    putstr("status = ");
+    puthex32_nl(status);
+  }
+    
+  dbsm_process_status(&dsp_tx_sm, status);
+  dbsm_process_status(&dsp_rx_sm, status);
+}
+
+int
+main(void)
+{
+  u2_init();
+
+  putstr("\neth <-> serdes\n");
+
+  ethernet_register_link_changed_callback(link_changed_callback);
+  ethernet_init();
+
+  // clocks_mimo_config(MC_WE_LOCK_TO_SMA | MC_PROVIDE_CLK_TO_MIMO);
+  clocks_mimo_config(MC_WE_DONT_LOCK | MC_PROVIDE_CLK_TO_MIMO);
+
+#if 0
+  // make bit 15 of Tx gpio's be a s/w output
+  hal_gpio_set_sel(GPIO_TX_BANK, 15, 's');
+  hal_gpio_set_ddr(GPIO_TX_BANK, 0x8000, 0x8000);
+#endif
+
+#if 1
+  output_regs->debug_mux_ctrl = 1;
+  hal_gpio_set_sels(GPIO_TX_BANK, "1111111111111111");
+  hal_gpio_set_sels(GPIO_RX_BANK, "1111111111111111");
+  hal_gpio_set_ddr(GPIO_TX_BANK, 0xffff, 0xffff);
+  hal_gpio_set_ddr(GPIO_RX_BANK, 0xffff, 0xffff);
+#endif
+
+
+  // initialize double buffering state machine for ethernet -> serdes
+
+  dbsm_init(&dsp_tx_sm, DSP_TX_BUF_0,
+	    &dsp_tx_recv_args, &dsp_tx_send_args,
+	    eth_pkt_inspector);
+
+
+  // initialize double buffering state machine for serdes -> ethernet
+
+  if (FW_SETS_SEQNO){
+    dbsm_init(&dsp_rx_sm, DSP_RX_BUF_0,
+	      &dsp_rx_recv_args, &dsp_rx_send_args,
+	      fw_sets_seqno_inspector);
+  }
+  else {
+    dbsm_init(&dsp_rx_sm, DSP_RX_BUF_0,
+	      &dsp_rx_recv_args, &dsp_rx_send_args,
+	      dbsm_nop_inspector);
+  }
+
+  // tell app_common that this dbsm could be sending to the ethernet
+  ac_could_be_sending_to_eth = &dsp_rx_sm;
+
+
+  // kick off the state machines
+  dbsm_start(&dsp_tx_sm);
+  dbsm_start(&dsp_rx_sm);
+
+  //int which = 0;
+
+  while(1){
+    // hal_gpio_write(GPIO_TX_BANK, which, 0x8000);
+    // which ^= 0x8000;
+
+    buffer_irq_handler(0);
+  }
+}