Added call to set antenna. Split XCVR into new thing cuz size.

1 files changed, 403 insertions, 0 deletions

diff --git a/usrp2/firmware/lib/db_init_xcvr.c b/usrp2/firmware/lib/db_init_xcvr.c
new file mode 100644
index 000000000..729faa0be
--- /dev/null
+++ b/usrp2/firmware/lib/db_init_xcvr.c
@@ -0,0 +1,403 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2009 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/>.
+ */
+
+
+#include <memory_map.h>
+#include <i2c.h>
+#include <usrp2_i2c_addr.h>
+#include <string.h>
+#include <stdio.h>
+#include <db.h>
+#include <db_base.h>
+#include <hal_io.h>
+#include <nonstdio.h>
+
+
+struct db_base *tx_dboard;	// the tx daughterboard that's installed
+struct db_base *rx_dboard;	// the rx daughterboard that's installed
+
+extern struct db_base db_basic_tx;
+extern struct db_base db_basic_rx;
+extern struct db_base db_lf_tx;
+extern struct db_base db_lf_rx;
+extern struct db_base db_xcvr2450_tx;
+extern struct db_base db_xcvr2450_rx;
+
+struct db_base *all_dboards[] = {
+  &db_basic_tx,
+  &db_basic_rx,
+  &db_lf_tx,
+  &db_lf_rx,
+  &db_xcvr2450_rx,
+  &db_xcvr2450_tx,
+  0
+};
+
+
+typedef enum { UDBE_OK, UDBE_NO_EEPROM, UDBE_INVALID_EEPROM } usrp_dbeeprom_status_t;
+
+static usrp_dbeeprom_status_t
+read_raw_dboard_eeprom (unsigned char *buf, int i2c_addr)
+{
+  if (!eeprom_read (i2c_addr, 0, buf, DB_EEPROM_CLEN))
+    return UDBE_NO_EEPROM;
+
+  if (buf[DB_EEPROM_MAGIC] != DB_EEPROM_MAGIC_VALUE)
+    return UDBE_INVALID_EEPROM;
+
+  int sum = 0;
+  unsigned int i;
+  for (i = 0; i < DB_EEPROM_CLEN; i++)
+    sum += buf[i];
+
+  if ((sum & 0xff) != 0)
+    return UDBE_INVALID_EEPROM;
+
+  return UDBE_OK;
+}
+
+
+/*
+ * Return DBID, -1 <none> or -2 <invalid eeprom contents>
+ */
+int
+read_dboard_eeprom(int i2c_addr)
+{
+  unsigned char buf[DB_EEPROM_CLEN];
+
+  usrp_dbeeprom_status_t s = read_raw_dboard_eeprom (buf, i2c_addr);
+
+  //printf("\nread_raw_dboard_eeprom: %d\n", s);
+
+  switch (s){
+  case UDBE_OK:
+    return (buf[DB_EEPROM_ID_MSB] << 8) | buf[DB_EEPROM_ID_LSB];
+
+  case UDBE_NO_EEPROM:
+  default:
+    return -1;
+
+  case UDBE_INVALID_EEPROM:
+    return -2;
+  }
+}
+
+
+static struct db_base *
+lookup_dbid(int dbid)
+{
+  if (dbid < 0)
+    return 0;
+
+  int i;
+  for (i = 0; all_dboards[i]; i++)
+    if (all_dboards[i]->dbid == dbid)
+      return all_dboards[i];
+
+  return 0;
+}
+
+static struct db_base *
+lookup_dboard(int i2c_addr, struct db_base *default_db, char *msg)
+{
+  struct db_base *db;
+  int dbid = read_dboard_eeprom(i2c_addr);
+
+  // FIXME removing this printf has the system hang if there are two d'boards
+  // installed.  (I think the problem is in i2c_read/write or the way
+  // I kludge the zero-byte write to set the read address in eeprom_read.)
+  printf("%s dbid: 0x%x\n", msg, dbid);
+
+  if (dbid < 0){	// there was some kind of problem.  Treat as Basic Tx
+    return default_db;
+  }
+  else if ((db = lookup_dbid(dbid)) == 0){
+    printf("No daugherboard code for dbid = 0x%x\n", dbid);
+    return default_db;
+  }
+  return db;
+}
+
+void
+set_atr_regs(int bank, struct db_base *db)
+{
+  uint32_t	val[4];
+  int		shift;
+  int		mask;
+  int		i;
+
+  val[ATR_IDLE] = db->atr_rxval;
+  val[ATR_RX]   = db->atr_rxval;
+  val[ATR_TX]   = db->atr_txval;
+  val[ATR_FULL] = db->atr_txval;
+
+  if (bank == GPIO_TX_BANK){
+    mask = 0xffff0000;
+    shift = 16;
+  }
+  else {
+    mask = 0x0000ffff;
+    shift = 0;
+  }
+
+  for (i = 0; i < 4; i++){
+    int t = (atr_regs->v[i] & ~mask) | ((val[i] << shift) & mask);
+    //printf("atr_regs[%d] = 0x%x\n", i, t);
+    atr_regs->v[i] = t;
+  }
+}
+
+static void
+set_gpio_mode(int bank, struct db_base *db)
+{
+  int	i;
+
+  hal_gpio_set_ddr(bank, db->output_enables, 0xffff);
+  set_atr_regs(bank, db);
+
+  for (i = 0; i < 16; i++){
+    if (db->used_pins & (1 << i)){
+      // set to either GPIO_SEL_SW or GPIO_SEL_ATR
+      hal_gpio_set_sel(bank, i, (db->atr_mask & (1 << i)) ? 'a' : 's');
+    }
+  }
+}
+
+static int __attribute__((unused))
+determine_tx_mux_value(struct db_base *db) 
+{
+  if (db->i_and_q_swapped)
+    return 0x01;
+  else
+    return 0x10;
+}
+
+static int
+determine_rx_mux_value(struct db_base *db)
+{
+#define	ADC0 0x0
+#define	ADC1 0x1
+#define ZERO 0x2
+  
+  static int truth_table[8] = {
+    /* swap_iq, uses */
+    /* 0, 0x0 */    (ZERO << 2) | ZERO,		// N/A
+    /* 0, 0x1 */    (ZERO << 2) | ADC0,
+    /* 0, 0x2 */    (ZERO << 2) | ADC1,
+    /* 0, 0x3 */    (ADC1 << 2) | ADC0,
+    /* 1, 0x0 */    (ZERO << 2) | ZERO,		// N/A
+    /* 1, 0x1 */    (ZERO << 2) | ADC0,
+    /* 1, 0x2 */    (ZERO << 2) | ADC1,
+    /* 1, 0x3 */    (ADC0 << 2) | ADC1,
+  };
+
+  int	subdev0_uses;
+  int	subdev1_uses;
+  int	uses;
+
+  if (db->is_quadrature)
+    subdev0_uses = 0x3;		// uses A/D 0 and 1
+  else
+    subdev0_uses = 0x1;		// uses A/D 0 only
+
+  // FIXME second subdev on Basic Rx, LF RX
+  // if subdev2 exists
+  // subdev1_uses = 0x2;
+  subdev1_uses = 0;
+
+  uses = subdev0_uses;
+
+  int swap_iq = db->i_and_q_swapped & 0x1;
+  int index = (swap_iq << 2) | uses;
+
+  return truth_table[index];
+}
+
+
+void
+db_init(void)
+{
+  int	m;
+
+  tx_dboard = lookup_dboard(I2C_ADDR_TX_A, &db_basic_tx, "Tx");
+  //printf("db_init: tx dbid = 0x%x\n", tx_dboard->dbid);
+  set_gpio_mode(GPIO_TX_BANK, tx_dboard);
+  tx_dboard->init(tx_dboard);
+  m = determine_tx_mux_value(tx_dboard);
+  dsp_tx_regs->tx_mux = m;
+  //printf("tx_mux = 0x%x\n", m);
+  tx_dboard->current_lo_offset = tx_dboard->default_lo_offset;
+
+  rx_dboard = lookup_dboard(I2C_ADDR_RX_A, &db_basic_rx, "Rx");
+  //printf("db_init: rx dbid = 0x%x\n", rx_dboard->dbid);
+  set_gpio_mode(GPIO_RX_BANK, rx_dboard);
+  rx_dboard->init(rx_dboard);
+  m = determine_rx_mux_value(rx_dboard);
+  dsp_rx_regs->rx_mux = m;
+  //printf("rx_mux = 0x%x\n", m);
+  rx_dboard->current_lo_offset = rx_dboard->default_lo_offset;
+}
+
+/*!
+ *  Calculate the frequency to use for setting the digital down converter.
+ *
+ *  \param[in] target_freq   desired RF frequency (Hz)
+ *  \param[in] baseband_freq the RF frequency that corresponds to DC in the IF.
+ * 
+ *  \param[out] dxc_freq is the value for the ddc
+ *  \param[out] inverted is true if we're operating in an inverted Nyquist zone.
+*/
+void
+calc_dxc_freq(u2_fxpt_freq_t target_freq, u2_fxpt_freq_t baseband_freq,
+	      u2_fxpt_freq_t *dxc_freq, bool *inverted)
+{
+  u2_fxpt_freq_t fs = U2_DOUBLE_TO_FXPT_FREQ(100e6);	// converter sample rate
+  u2_fxpt_freq_t delta = target_freq - baseband_freq;
+
+#if 0
+  printf("calc_dxc_freq\n");
+  printf("  fs       = "); print_fxpt_freq(fs); newline();
+  printf("  target   = "); print_fxpt_freq(target_freq); newline();
+  printf("  baseband = "); print_fxpt_freq(baseband_freq); newline();
+  printf("  delta    = "); print_fxpt_freq(delta); newline();
+#endif  
+
+  if (delta >= 0){
+    while (delta > fs)
+      delta -= fs;
+    if (delta <= fs/2){		// non-inverted region
+      *dxc_freq = -delta;
+      *inverted = false;
+    }
+    else {			// inverted region
+      *dxc_freq = delta - fs;
+      *inverted = true;
+    }
+  }
+  else {
+    while (delta < -fs)
+      delta += fs;
+    if (delta >= -fs/2){	// non-inverted region
+      *dxc_freq = -delta;
+      *inverted = false;
+    }
+    else {			// inverted region
+      *dxc_freq = delta + fs;
+      *inverted = true;
+    }
+  }
+}
+
+bool
+db_set_lo_offset(struct db_base *db, u2_fxpt_freq_t offset)
+{
+  db->current_lo_offset = offset;
+  return true;
+}
+
+bool
+db_tune(struct db_base *db, u2_fxpt_freq_t target_freq, struct tune_result *result)
+{
+  memset(result, 0, sizeof(*result));
+  bool inverted = false;
+  u2_fxpt_freq_t dxc_freq;
+  u2_fxpt_freq_t actual_dxc_freq;
+
+  // Ask the d'board to tune as closely as it can to target_freq+lo_offset
+  bool ok = db->set_freq(db, target_freq+db->current_lo_offset, &result->baseband_freq);
+
+  // Calculate the DDC setting that will downconvert the baseband from the
+  // daughterboard to our target frequency.
+  calc_dxc_freq(target_freq, result->baseband_freq, &dxc_freq, &inverted);
+
+  // If the spectrum is inverted, and the daughterboard doesn't do
+  // quadrature downconversion, we can fix the inversion by flipping the
+  // sign of the dxc_freq...  (This only happens using the basic_rx board)
+  
+  if (db->spectrum_inverted)
+    inverted = !inverted;
+
+  if (inverted && !db->is_quadrature){
+    dxc_freq = -dxc_freq;
+    inverted = !inverted;
+  }
+
+  if (db->is_tx){
+    dxc_freq = -dxc_freq;	// down conversion versus up conversion
+    ok &= db_set_duc_freq(dxc_freq, &actual_dxc_freq);
+  }
+  else {
+    ok &= db_set_ddc_freq(dxc_freq, &actual_dxc_freq);
+  }
+
+  result->dxc_freq = dxc_freq;
+  result->residual_freq = dxc_freq - actual_dxc_freq;
+  result->inverted = inverted;
+  return ok;
+}
+
+static int32_t
+compute_freq_control_word(u2_fxpt_freq_t target_freq, u2_fxpt_freq_t *actual_freq)
+{
+  // If we were using floating point, we'd calculate
+  //   master = 100e6;
+  //   v = (int) rint(target_freq / master_freq) * pow(2.0, 32.0);
+
+  //printf("compute_freq_control_word\n");
+  //printf("  target_freq = "); print_fxpt_freq(target_freq); newline();
+
+  int32_t master_freq = 100000000;	// 100M
+
+  int32_t v = ((target_freq << 12)) / master_freq;
+  //printf("  fcw = %d\n", v);
+
+  *actual_freq = (v * (int64_t) master_freq) >> 12;
+
+  //printf("  actual = "); print_fxpt_freq(*actual_freq); newline();
+
+  return v;
+}
+
+
+bool
+db_set_ddc_freq(u2_fxpt_freq_t dxc_freq, u2_fxpt_freq_t *actual_dxc_freq)
+{
+  int32_t v = compute_freq_control_word(dxc_freq, actual_dxc_freq);
+  dsp_rx_regs->freq = v;
+  return true;
+}
+
+bool
+db_set_duc_freq(u2_fxpt_freq_t dxc_freq, u2_fxpt_freq_t *actual_dxc_freq)
+{
+  int32_t v = compute_freq_control_word(dxc_freq, actual_dxc_freq);
+  dsp_tx_regs->freq = v;
+  return true;
+}
+
+bool
+db_set_gain(struct db_base *db, u2_fxpt_gain_t gain)
+{
+  return db->set_gain(db, gain);
+}
+
+bool
+db_set_antenna(struct db_base *db, int ant)
+{
+  return db->set_antenna(db, ant);
+}