b200: Moved AD9361 driver to host

- Switched to FPGA SPI engine
- Moved firmware AD9361 driver to UHD
- Bumped FW compat to 5, FPGA compat to 4
- Known Issue: AD9361 SPI rate is too slow

1 files changed, 1999 insertions, 0 deletions

diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_impl.c b/host/lib/usrp/common/ad9361_driver/ad9361_impl.c
new file mode 100644
index 000000000..fab906e6f
--- /dev/null
+++ b/host/lib/usrp/common/ad9361_driver/ad9361_impl.c
@@ -0,0 +1,1999 @@
+//
+// Copyright 2014 Ettus Research LLC
+//
+
+#include <stdarg.h>
+#include <stdio.h>
+#ifdef __cplusplus
+#include <string.h>
+static int lround(double dbl) { return static_cast<int>(dbl+0.5); }
+using namespace std;
+#else
+#include <stdbool.h>
+#include <math.h>
+#endif
+#include <iostream>
+#include <ad9361_transaction.h>
+#include "ad9361_filter_taps.h"
+#include "ad9361_gain_tables.h"
+#include "ad9361_synth_lut.h"
+#include "ad9361_dispatch.h"
+#include "ad9361_platform.h"    //Platform specific operations
+#include "ad9361_client.h"      //Client (product) specific settings
+#include "ad9361_device.h"
+
+#define AD9361_MIN(a, b) (((a) < (b)) ? (a) : (b))
+#define AD9361_MAX(a, b) (((a) > (b)) ? (a) : (b))
+
+////////////////////////////////////////////////////////////
+
+static void fake_msg(const char* str, ...)
+{
+    (void) str;
+}
+
+static msgfn _msgfn = fake_msg;
+
+//extern void msg(const char* str, ...);    External object must provide this symbol
+#define msg (_msgfn)
+
+void ad9361_set_msgfn(msgfn pfn)
+{
+    _msgfn = pfn;
+}
+
+////////////////////////////////////////////////////////////
+#define AD9361_MAX_GAIN 89.75
+
+#define DOUBLE_PI 3.14159265359
+#define DOUBLE_LN_2 0.693147181
+
+#define RX_TYPE 0
+#define TX_TYPE 1
+
+////////////////////////////////////////////////////////////
+// the following macros evaluate to a compile time constant
+// macros By Tom Torfs - donated to the public domain
+
+/* turn a numeric literal into a hex constant
+(avoids problems with leading zeroes)
+8-bit constants max value 0x11111111, always fits in unsigned long
+*/
+#define HEX__(n) 0x##n##LU
+
+/* 8-bit conversion function */
+#define B8__(x) ((x&0x0000000FLU)?1:0) \
++((x&0x000000F0LU)?2:0) \
++((x&0x00000F00LU)?4:0) \
++((x&0x0000F000LU)?8:0) \
++((x&0x000F0000LU)?16:0) \
++((x&0x00F00000LU)?32:0) \
++((x&0x0F000000LU)?64:0) \
++((x&0xF0000000LU)?128:0)
+
+/* *** user macros *** */
+
+/* for upto 8-bit binary constants */
+#define B8(d) ((unsigned char)B8__(HEX__(d)))
+
+double set_gain(uint64_t handle, int which, int n, const double value);
+void set_active_chains(uint64_t handle, bool tx1, bool tx2, bool rx1, bool rx2);
+/***********************************************************************
+ * Placeholders, unused, or test functions
+ **********************************************************************/
+static char *tmp_req_buffer;
+void post_err_msg( const char* error)
+{
+    msg("[AD9361 error] %s", error);
+    if (!tmp_req_buffer)
+        return;
+
+    ad9361_transaction_t *request = (ad9361_transaction_t *)tmp_req_buffer;
+    strncpy(request->error_msg, error, (AD9361_TRANSACTION_MAX_ERROR_MSG + 1)); // '+ 1' as length excludes terminating NUL
+    request->error_msg[AD9361_TRANSACTION_MAX_ERROR_MSG] = '\0';  // If string was too long, NUL will not be copied, so force one just in case
+}
+
+/* Make AD9361 output its test tone. */
+void output_test_tone(ad9361_device_t* device) {
+    /* Output a 480 kHz tone at 800 MHz */
+    write_ad9361_reg(device, 0x3F4, 0x0B);
+    write_ad9361_reg(device, 0x3FC, 0xFF);
+    write_ad9361_reg(device, 0x3FD, 0xFF);
+    write_ad9361_reg(device, 0x3FE, 0x3F);
+}
+
+/* Turn on/off AD9361's TX port --> RX port loopback. */
+void data_port_loopback(uint64_t handle, const int on) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+    msg("[data_port_loopback] Enabled: %d", on);
+    write_ad9361_reg(device, 0x3F5, (on ? 0x01 : 0x00));
+}
+
+/* This is a simple comparison for very large double-precision floating
+ * point numbers. It is used to prevent re-tunes for frequencies that are
+ * the same but not 'exactly' because of data precision issues. */
+// TODO: see if we can avoid the need for this function
+int freq_is_nearly_equal(double a, double b) {
+    return AD9361_MAX(a,b) - AD9361_MIN(a,b) < 1;
+}
+
+/***********************************************************************
+ * Filter functions
+ **********************************************************************/
+
+/* This function takes in the calculated maximum number of FIR taps, and
+ * returns a number of taps that makes AD9361 happy. */
+int get_num_taps(int max_num_taps) {
+
+    int num_taps = 0;
+    int num_taps_list[] = {16, 32, 48, 64, 80, 96, 112, 128};
+    int i;
+    for(i = 1; i < 8; i++) {
+        if(max_num_taps >= num_taps_list[i]) {
+            continue;
+        } else {
+            num_taps = num_taps_list[i - 1];
+            break;
+        }
+    } if(num_taps == 0) { num_taps = 128; }
+
+    return num_taps;
+}
+
+/* Program either the RX or TX FIR filter.
+ *
+ * The process is the same for both filters, but the function must be told
+ * how many taps are in the filter, and given a vector of the taps
+ * themselves.  */
+
+void program_fir_filter(ad9361_device_t* device, int which, int num_taps, uint16_t *coeffs) {
+  uint16_t base;
+
+  /* RX and TX filters use largely identical sets of programming registers.
+     Select the appropriate bank of registers here. */
+  if(which == RX_TYPE) {
+    base = 0x0f0;
+  } else {
+    base = 0x060;
+  }
+
+  /* Encode number of filter taps for programming register */
+  uint8_t reg_numtaps = (((num_taps / 16) - 1) & 0x07) << 5;
+
+  /* Turn on the filter clock. */
+  write_ad9361_reg(device, base+5, reg_numtaps | 0x1a);
+  ad9361_msleep(1);
+
+  /* Zero the unused taps just in case they have stale data */
+  int addr;
+  for(addr=num_taps; addr < 128; addr++) {
+    write_ad9361_reg(device, base+0, addr);
+    write_ad9361_reg(device, base+1, 0x0);
+    write_ad9361_reg(device, base+2, 0x0);
+    write_ad9361_reg(device, base+5, reg_numtaps |  0x1e);
+    write_ad9361_reg(device, base+4, 0x00);
+    write_ad9361_reg(device, base+4, 0x00);
+    }
+
+ /* Iterate through indirect programming of filter coeffs using ADI recomended procedure */
+  for(addr=0; addr < num_taps; addr++) {
+    write_ad9361_reg(device, base+0, addr);
+    write_ad9361_reg(device, base+1, (coeffs[addr]) & 0xff);
+    write_ad9361_reg(device, base+2, (coeffs[addr] >> 8) & 0xff);
+    write_ad9361_reg(device, base+5, reg_numtaps |  0x1e);
+    write_ad9361_reg(device, base+4, 0x00);
+    write_ad9361_reg(device, base+4, 0x00);
+    }
+
+    /* UG-671 states (page 25) (paraphrased and clarified):
+       " After the table has been programmed, write to register BASE+5 with the write bit D2 cleared and D1 high.
+       Then, write to register BASE+5 again with D1 clear, thus ensuring that the write bit resets internally
+       before the clock stops. Wait 4 sample clock periods after setting D2 high while that data writes into the table"
+    */
+
+    write_ad9361_reg(device, base+5, reg_numtaps | 0x1A);
+    if(which == RX_TYPE) {
+      write_ad9361_reg(device, base+5, reg_numtaps | 0x18);
+      write_ad9361_reg(device, base+6, 0x02); /* Also turn on -6dB Rx gain here, to stop filter overfow.*/
+  } else {
+      write_ad9361_reg(device, base+5, reg_numtaps | 0x19); /* Also turn on -6dB Tx gain here, to stop filter overfow.*/
+  }
+}
+
+
+
+/* Program the RX FIR Filter. */
+void setup_rx_fir(ad9361_device_t* device, int total_num_taps) {
+    int num_taps = total_num_taps;
+#ifdef __cplusplus
+    uint16_t* coeffs = new uint16_t[num_taps];
+#else
+    uint16_t coeffs[num_taps];
+#endif
+    int i;
+    for(i = 0; i < num_taps; i++) {
+      switch(num_taps) {
+      case 128: coeffs[i] = (uint16_t)hb127_coeffs[i]; break;
+      case 96:  coeffs[i] = (uint16_t)hb95_coeffs[i]; break;
+      case 64:  coeffs[i] = (uint16_t)hb63_coeffs[i]; break;
+      case 48:  coeffs[i] = (uint16_t)hb47_coeffs[i]; break;
+      default:  post_err_msg("Unsupported number of Rx FIR taps.");
+      }
+    }
+
+    program_fir_filter(device, RX_TYPE, total_num_taps, coeffs);
+#ifdef __cplusplus
+    delete[] coeffs;
+#endif
+}
+
+/* Program the TX FIR Filter. */
+void setup_tx_fir(ad9361_device_t* device, int total_num_taps) {
+    int num_taps = total_num_taps;
+#ifdef __cplusplus
+    uint16_t* coeffs = new uint16_t[num_taps];
+#else
+    uint16_t coeffs[num_taps];
+#endif
+    int i;
+    for(i = 0; i < num_taps; i++) {
+      switch(num_taps) {
+      case 128: coeffs[i] = (uint16_t)hb127_coeffs[i]; break;
+      case 96:  coeffs[i] = (uint16_t)hb95_coeffs[i]; break;
+      case 64:  coeffs[i] = (uint16_t)hb63_coeffs[i]; break;
+      case 48:  coeffs[i] = (uint16_t)hb47_coeffs[i]; break;
+      default:  post_err_msg("Unsupported number of Tx FIR taps.");
+      }
+    }
+
+    program_fir_filter(device, TX_TYPE, total_num_taps, coeffs);
+#ifdef __cplusplus
+    delete[] coeffs;
+#endif
+}
+
+/***********************************************************************
+ * Calibration functions
+ ***********************************************************************/
+
+/* Calibrate and lock the BBPLL.
+ *
+ * This function should be called anytime the BBPLL is tuned. */
+void calibrate_lock_bbpll(ad9361_device_t* device) {
+    write_ad9361_reg(device, 0x03F, 0x05); // Start the BBPLL calibration
+    write_ad9361_reg(device, 0x03F, 0x01); // Clear the 'start' bit
+
+    /* Increase BBPLL KV and phase margin. */
+    write_ad9361_reg(device, 0x04c, 0x86);
+    write_ad9361_reg(device, 0x04d, 0x01);
+    write_ad9361_reg(device, 0x04d, 0x05);
+
+    /* Wait for BBPLL lock. */
+    int count = 0;
+    while(!(read_ad9361_reg(device, 0x05e) & 0x80)) {
+        if(count > 1000) {
+            post_err_msg("BBPLL not locked");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(2);
+    }
+}
+
+/* Calibrate the synthesizer charge pumps.
+ *
+ * Technically, this calibration only needs to be done once, at device
+ * initialization. */
+void calibrate_synth_charge_pumps(ad9361_device_t* device) {
+    /* If this function ever gets called, and the ENSM isn't already in the
+     * ALERT state, then something has gone horribly wrong. */
+    if((read_ad9361_reg(device, 0x017) & 0x0F) != 5) {
+        post_err_msg("AD9361 not in ALERT during cal");
+    }
+
+    /* Calibrate the RX synthesizer charge pump. */
+    int count = 0;
+    write_ad9361_reg(device, 0x23d, 0x04);
+    while(!(read_ad9361_reg(device, 0x244) & 0x80)) {
+        if(count > 5) {
+            post_err_msg("RX charge pump cal failure");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(1);
+    }
+    write_ad9361_reg(device, 0x23d, 0x00);
+
+    /* Calibrate the TX synthesizer charge pump. */
+    count = 0;
+    write_ad9361_reg(device, 0x27d, 0x04);
+    while(!(read_ad9361_reg(device, 0x284) & 0x80)) {
+        if(count > 5) {
+            post_err_msg("TX charge pump cal failure");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(1);
+    }
+    write_ad9361_reg(device, 0x27d, 0x00);
+}
+
+/* Calibrate the analog BB RX filter.
+ *
+ * Note that the filter calibration depends heavily on the baseband
+ * bandwidth, so this must be re-done after any change to the RX sample
+ * rate. */
+double calibrate_baseband_rx_analog_filter(ad9361_device_t* device) {
+    /* For filter tuning, baseband BW is half the complex BW, and must be
+     * between 28e6 and 0.2e6. */
+    double bbbw = device->baseband_bw / 2.0;
+    if(bbbw > 28e6) {
+        bbbw = 28e6;
+    } else if (bbbw < 0.20e6) {
+        bbbw = 0.20e6;
+    }
+
+    double rxtune_clk = ((1.4 * bbbw * 2 *
+            DOUBLE_PI) / DOUBLE_LN_2);
+
+    device->rx_bbf_tunediv = AD9361_MIN(511, ad9361_ceil_to_int(device->bbpll_freq / rxtune_clk));
+
+    device->regs.bbftune_config = (device->regs.bbftune_config & 0xFE) \
+                         | ((device->rx_bbf_tunediv >> 8) & 0x0001);
+
+    double bbbw_mhz = bbbw / 1e6;
+
+    double temp = ((bbbw_mhz - ad9361_floor_to_int(bbbw_mhz)) * 1000) / 7.8125;
+    uint8_t bbbw_khz = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int(temp + 0.5)));
+
+    /* Set corner frequencies and dividers. */
+    write_ad9361_reg(device, 0x1fb, (uint8_t)(bbbw_mhz));
+    write_ad9361_reg(device, 0x1fc, bbbw_khz);
+    write_ad9361_reg(device, 0x1f8, (device->rx_bbf_tunediv & 0x00FF));
+    write_ad9361_reg(device, 0x1f9, device->regs.bbftune_config);
+
+    /* RX Mix Voltage settings - only change with apps engineer help. */
+    write_ad9361_reg(device, 0x1d5, 0x3f);
+    write_ad9361_reg(device, 0x1c0, 0x03);
+
+    /* Enable RX1 & RX2 filter tuners. */
+    write_ad9361_reg(device, 0x1e2, 0x02);
+    write_ad9361_reg(device, 0x1e3, 0x02);
+
+    /* Run the calibration! */
+    int count = 0;
+    write_ad9361_reg(device, 0x016, 0x80);
+    while(read_ad9361_reg(device, 0x016) & 0x80) {
+        if(count > 100) {
+            post_err_msg("RX baseband filter cal FAILURE");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(1);
+    }
+
+    /* Disable RX1 & RX2 filter tuners. */
+    write_ad9361_reg(device, 0x1e2, 0x03);
+    write_ad9361_reg(device, 0x1e3, 0x03);
+
+    return bbbw;
+}
+
+/* Calibrate the analog BB TX filter.
+ *
+ * Note that the filter calibration depends heavily on the baseband
+ * bandwidth, so this must be re-done after any change to the TX sample
+ * rate. */
+double calibrate_baseband_tx_analog_filter(ad9361_device_t* device) {
+    /* For filter tuning, baseband BW is half the complex BW, and must be
+     * between 28e6 and 0.2e6. */
+    double bbbw = device->baseband_bw / 2.0;
+    if(bbbw > 20e6) {
+        bbbw = 20e6;
+    } else if (bbbw < 0.625e6) {
+        bbbw = 0.625e6;
+    }
+
+    double txtune_clk = ((1.6 * bbbw * 2 *
+            DOUBLE_PI) / DOUBLE_LN_2);
+
+    uint16_t txbbfdiv = AD9361_MIN(511, (ad9361_ceil_to_int(device->bbpll_freq / txtune_clk)));
+
+    device->regs.bbftune_mode = (device->regs.bbftune_mode & 0xFE) \
+                         | ((txbbfdiv >> 8) & 0x0001);
+
+    /* Program the divider values. */
+    write_ad9361_reg(device, 0x0d6, (txbbfdiv & 0x00FF));
+    write_ad9361_reg(device, 0x0d7, device->regs.bbftune_mode);
+
+    /* Enable the filter tuner. */
+    write_ad9361_reg(device, 0x0ca, 0x22);
+
+    /* Calibrate! */
+    int count = 0;
+    write_ad9361_reg(device, 0x016, 0x40);
+    while(read_ad9361_reg(device, 0x016) & 0x40) {
+        if(count > 100) {
+            post_err_msg("TX baseband filter cal FAILURE");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(1);
+    }
+
+    /* Disable the filter tuner. */
+    write_ad9361_reg(device, 0x0ca, 0x26);
+
+    return bbbw;
+}
+
+/* Calibrate the secondary TX filter.
+ *
+ * This filter also depends on the TX sample rate, so if a rate change is
+ * made, the previous calibration will no longer be valid. */
+void calibrate_secondary_tx_filter(ad9361_device_t* device) {
+    /* For filter tuning, baseband BW is half the complex BW, and must be
+     * between 20e6 and 0.53e6. */
+    double bbbw = device->baseband_bw / 2.0;
+    if(bbbw > 20e6) {
+        bbbw = 20e6;
+    } else if (bbbw < 0.53e6) {
+        bbbw = 0.53e6;
+    }
+
+    double bbbw_mhz = bbbw / 1e6;
+
+    /* Start with a resistor value of 100 Ohms. */
+    int res = 100;
+
+    /* Calculate target corner frequency. */
+    double corner_freq = 5 * bbbw_mhz * 2 * DOUBLE_PI;
+
+    /* Iterate through RC values to determine correct combination. */
+    int cap = 0;
+    int i;
+    for(i = 0; i <= 3; i++) {
+        cap = (ad9361_floor_to_int(0.5 + (( 1 / ((corner_freq * res) * 1e6)) * 1e12))) - 12;
+
+        if(cap <= 63) {
+            break;
+        }
+
+        res = res * 2;
+    }
+    if(cap > 63) {
+        cap = 63;
+    }
+
+    uint8_t reg0d0, reg0d1, reg0d2;
+
+    /* Translate baseband bandwidths to register settings. */
+    if((bbbw_mhz * 2) <= 9) {
+        reg0d0 = 0x59;
+    } else if(((bbbw_mhz * 2) > 9) && ((bbbw_mhz * 2) <= 24)) {
+        reg0d0 = 0x56;
+    } else if((bbbw_mhz * 2) > 24) {
+        reg0d0 = 0x57;
+    } else {
+        post_err_msg("Cal2ndTxFil: INVALID_CODE_PATH bad bbbw_mhz");
+        reg0d0 = 0x00;
+    }
+
+    /* Translate resistor values to register settings. */
+    if(res == 100) {
+        reg0d1 = 0x0c;
+    } else if(res == 200) {
+        reg0d1 = 0x04;
+    } else if(res == 400) {
+        reg0d1 = 0x03;
+    } else if(res == 800) {
+        reg0d1 = 0x01;
+    } else {
+        reg0d1 = 0x0c;
+    }
+
+    reg0d2 = cap;
+
+    /* Program the above-calculated values. Sweet. */
+    write_ad9361_reg(device, 0x0d2, reg0d2);
+    write_ad9361_reg(device, 0x0d1, reg0d1);
+    write_ad9361_reg(device, 0x0d0, reg0d0);
+}
+
+/* Calibrate the RX TIAs.
+ *
+ * Note that the values in the TIA register, after calibration, vary with
+ * the RX gain settings. */
+void calibrate_rx_TIAs(ad9361_device_t* device) {
+
+    uint8_t reg1eb = read_ad9361_reg(device, 0x1eb) & 0x3F;
+    uint8_t reg1ec = read_ad9361_reg(device, 0x1ec) & 0x7F;
+    uint8_t reg1e6 = read_ad9361_reg(device, 0x1e6) & 0x07;
+    uint8_t reg1db = 0x00;
+    uint8_t reg1dc = 0x00;
+    uint8_t reg1dd = 0x00;
+    uint8_t reg1de = 0x00;
+    uint8_t reg1df = 0x00;
+
+    /* For calibration, baseband BW is half the complex BW, and must be
+     * between 28e6 and 0.2e6. */
+    double bbbw = device->baseband_bw / 2.0;
+    if(bbbw > 20e6) {
+        bbbw = 20e6;
+    } else if (bbbw < 0.20e6) {
+        bbbw = 0.20e6;
+    }
+    double ceil_bbbw_mhz = ad9361_ceil_to_int(bbbw / 1e6);
+
+    /* Do some crazy resistor and capacitor math. */
+    int Cbbf = (reg1eb * 160) + (reg1ec * 10) + 140;
+    int R2346 = 18300 * (reg1e6 & 0x07);
+    double CTIA_fF = (Cbbf * R2346 * 0.56) / 3500;
+
+    /* Translate baseband BW to register settings. */
+    if(ceil_bbbw_mhz <= 3) {
+        reg1db = 0xe0;
+    } else if((ceil_bbbw_mhz > 3) && (ceil_bbbw_mhz <= 10)) {
+        reg1db = 0x60;
+    } else if(ceil_bbbw_mhz > 10) {
+        reg1db = 0x20;
+    } else {
+        post_err_msg("CalRxTias: INVALID_CODE_PATH bad bbbw_mhz");
+    }
+
+    if(CTIA_fF > 2920) {
+        reg1dc = 0x40;
+        reg1de = 0x40;
+
+        uint8_t temp = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int(0.5 + ((CTIA_fF - 400.0) / 320.0))));
+        reg1dd = temp;
+        reg1df = temp;
+    } else {
+        uint8_t temp = (uint8_t) ad9361_floor_to_int(0.5 + ((CTIA_fF - 400.0) / 40.0)) + 0x40;
+        reg1dc = temp;
+        reg1de = temp;
+        reg1dd = 0;
+        reg1df = 0;
+    }
+
+    /* w00t. Settings calculated. Program them and roll out. */
+    write_ad9361_reg(device, 0x1db, reg1db);
+    write_ad9361_reg(device, 0x1dd, reg1dd);
+    write_ad9361_reg(device, 0x1df, reg1df);
+    write_ad9361_reg(device, 0x1dc, reg1dc);
+    write_ad9361_reg(device, 0x1de, reg1de);
+}
+
+/* Setup the AD9361 ADC.
+ *
+ * There are 40 registers that control the ADC's operation, most of the
+ * values of which must be derived mathematically, dependent on the current
+ * setting of the BBPLL. Note that the order of calculation is critical, as
+ * some of the 40 registers depend on the values in others. */
+void setup_adc(ad9361_device_t* device) {
+    double bbbw_mhz = (((device->bbpll_freq / 1e6) / device->rx_bbf_tunediv) * DOUBLE_LN_2) \
+                  / (1.4 * 2 * DOUBLE_PI);
+
+    /* For calibration, baseband BW is half the complex BW, and must be
+     * between 28e6 and 0.2e6. */
+    if(bbbw_mhz > 28) {
+        bbbw_mhz = 28;
+    } else if (bbbw_mhz < 0.20) {
+        bbbw_mhz = 0.20;
+    }
+
+    uint8_t rxbbf_c3_msb = read_ad9361_reg(device, 0x1eb) & 0x3F;
+    uint8_t rxbbf_c3_lsb = read_ad9361_reg(device, 0x1ec) & 0x7F;
+    uint8_t rxbbf_r2346 = read_ad9361_reg(device, 0x1e6) & 0x07;
+
+    double fsadc = device->adcclock_freq / 1e6;
+
+    /* Sort out the RC time constant for our baseband bandwidth... */
+    double rc_timeconst = 0.0;
+    if(bbbw_mhz < 18) {
+        rc_timeconst = (1 / ((1.4 * 2 * DOUBLE_PI) \
+                            * (18300 * rxbbf_r2346)
+                            * ((160e-15 * rxbbf_c3_msb)
+                                + (10e-15 * rxbbf_c3_lsb) + 140e-15)
+                            * (bbbw_mhz * 1e6)));
+    } else {
+        rc_timeconst = (1 / ((1.4 * 2 * DOUBLE_PI) \
+                            * (18300 * rxbbf_r2346)
+                            * ((160e-15 * rxbbf_c3_msb)
+                                + (10e-15 * rxbbf_c3_lsb) + 140e-15)
+                            * (bbbw_mhz * 1e6) * (1 + (0.01 * (bbbw_mhz - 18)))));
+    }
+
+    double scale_res = ad9361_sqrt(1 / rc_timeconst);
+    double scale_cap = ad9361_sqrt(1 / rc_timeconst);
+
+    double scale_snr = (device->adcclock_freq < 80e6) ? 1.0 : 1.584893192;
+    double maxsnr = 640 / 160;
+
+    /* Calculate the values for all 40 settings registers.
+     *
+     * DO NOT TOUCH THIS UNLESS YOU KNOW EXACTLY WHAT YOU ARE DOING. kthx.*/
+    uint8_t data[40];
+    data[0] = 0;    data[1] = 0; data[2] = 0; data[3] = 0x24;
+    data[4] = 0x24; data[5] = 0; data[6] = 0;
+    data[7] = (uint8_t) AD9361_MIN(124, (ad9361_floor_to_int(-0.5
+                    + (80.0 * scale_snr * scale_res
+                    * AD9361_MIN(1.0, ad9361_sqrt(maxsnr * fsadc / 640.0))))));
+    double data007 = data[7];
+    data[8] = (uint8_t) AD9361_MIN(255, (ad9361_floor_to_int(0.5
+                    + ((20.0 * (640.0 / fsadc) * ((data007 / 80.0))
+                    / (scale_res * scale_cap))))));
+    data[10] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int(-0.5 + (77.0 * scale_res
+                    * AD9361_MIN(1.0, ad9361_sqrt(maxsnr * fsadc / 640.0))))));
+    double data010 = data[10];
+    data[9] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int(0.8 * data010)));
+    data[11] = (uint8_t) AD9361_MIN(255, (ad9361_floor_to_int(0.5
+                    + (20.0 * (640.0 / fsadc) * ((data010 / 77.0)
+                    / (scale_res * scale_cap))))));
+    data[12] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int(-0.5
+                    + (80.0 * scale_res * AD9361_MIN(1.0,
+                    ad9361_sqrt(maxsnr * fsadc / 640.0))))));
+    double data012 = data[12];
+    data[13] = (uint8_t) AD9361_MIN(255, (ad9361_floor_to_int(-1.5
+                    + (20.0 * (640.0 / fsadc) * ((data012 / 80.0)
+                    / (scale_res * scale_cap))))));
+    data[14] = 21 * (uint8_t)(ad9361_floor_to_int(0.1 * 640.0 / fsadc));
+    data[15] = (uint8_t) AD9361_MIN(127, (1.025 * data007));
+    double data015 = data[15];
+    data[16] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int((data015
+                    * (0.98 + (0.02 * AD9361_MAX(1.0,
+                    (640.0 / fsadc) / maxsnr)))))));
+    data[17] = data[15];
+    data[18] = (uint8_t) AD9361_MIN(127, (0.975 * (data010)));
+    double data018 = data[18];
+    data[19] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int((data018
+                    * (0.98 + (0.02 * AD9361_MAX(1.0,
+                    (640.0 / fsadc) / maxsnr)))))));
+    data[20] = data[18];
+    data[21] = (uint8_t) AD9361_MIN(127, (0.975 * data012));
+    double data021 = data[21];
+    data[22] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int((data021
+                    * (0.98 + (0.02 * AD9361_MAX(1.0,
+                    (640.0 / fsadc) / maxsnr)))))));
+    data[23] = data[21];
+    data[24] = 0x2e;
+    data[25] = (uint8_t)(ad9361_floor_to_int(128.0 + AD9361_MIN(63.0,
+                    63.0 * (fsadc / 640.0))));
+    data[26] = (uint8_t)(ad9361_floor_to_int(AD9361_MIN(63.0, 63.0 * (fsadc / 640.0)
+                    * (0.92 + (0.08 * (640.0 / fsadc))))));
+    data[27] = (uint8_t)(ad9361_floor_to_int(AD9361_MIN(63.0,
+                    32.0 * ad9361_sqrt(fsadc / 640.0))));
+    data[28] = (uint8_t)(ad9361_floor_to_int(128.0 + AD9361_MIN(63.0,
+                    63.0 * (fsadc / 640.0))));
+    data[29] = (uint8_t)(ad9361_floor_to_int(AD9361_MIN(63.0,
+                    63.0 * (fsadc / 640.0)
+                    * (0.92 + (0.08 * (640.0 / fsadc))))));
+    data[30] = (uint8_t)(ad9361_floor_to_int(AD9361_MIN(63.0,
+                    32.0 * ad9361_sqrt(fsadc / 640.0))));
+    data[31] = (uint8_t)(ad9361_floor_to_int(128.0 + AD9361_MIN(63.0,
+                    63.0 * (fsadc / 640.0))));
+    data[32] = (uint8_t)(ad9361_floor_to_int(AD9361_MIN(63.0,
+                    63.0 * (fsadc / 640.0) * (0.92
+                    + (0.08 * (640.0 / fsadc))))));
+    data[33] = (uint8_t)(ad9361_floor_to_int(AD9361_MIN(63.0,
+                    63.0 * ad9361_sqrt(fsadc / 640.0))));
+    data[34] = (uint8_t) AD9361_MIN(127, (ad9361_floor_to_int(64.0
+                    * ad9361_sqrt(fsadc / 640.0))));
+    data[35] = 0x40;
+    data[36] = 0x40;
+    data[37] = 0x2c;
+    data[38] = 0x00;
+    data[39] = 0x00;
+
+    /* Program the registers! */
+    int i;
+    for(i=0; i<40; i++) {
+        write_ad9361_reg(device, 0x200+i, data[i]);
+    }
+
+}
+
+/* Calibrate the baseband DC offset.
+ *
+ * Note that this function is called from within the TX quadrature
+ * calibration function! */
+void calibrate_baseband_dc_offset(ad9361_device_t* device) {
+    write_ad9361_reg(device, 0x193, 0x3f); // Calibration settings
+    write_ad9361_reg(device, 0x190, 0x0f); // Set tracking coefficient
+    //write_ad9361_reg(device, 0x190, /*0x0f*//*0xDF*/0x80*1 | 0x40*1 | (16+8/*+4*/)); // Set tracking coefficient: don't *4 counter, do decim /4, increased gain shift
+    write_ad9361_reg(device, 0x194, 0x01); // More calibration settings
+
+    /* Start that calibration, baby. */
+    int count = 0;
+    write_ad9361_reg(device, 0x016, 0x01);
+    while(read_ad9361_reg(device, 0x016) & 0x01) {
+        if(count > 100) {
+            post_err_msg("Baseband DC Offset Calibration Failure");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(5);
+    }
+}
+
+/* Calibrate the RF DC offset.
+ *
+ * Note that this function is called from within the TX quadrature
+ * calibration function. */
+void calibrate_rf_dc_offset(ad9361_device_t* device) {
+    /* Some settings are frequency-dependent. */
+    if(device->rx_freq < 4e9) {
+        write_ad9361_reg(device, 0x186, 0x32); // RF DC Offset count
+        write_ad9361_reg(device, 0x187, 0x24);
+        write_ad9361_reg(device, 0x188, 0x05);
+    } else {
+        write_ad9361_reg(device, 0x186, 0x28); // RF DC Offset count
+        write_ad9361_reg(device, 0x187, 0x34);
+        write_ad9361_reg(device, 0x188, 0x06);
+    }
+
+    write_ad9361_reg(device, 0x185, 0x20); // RF DC Offset wait count
+    write_ad9361_reg(device, 0x18b, 0x83);
+    write_ad9361_reg(device, 0x189, 0x30);
+
+    /* Run the calibration! */
+    int count = 0;
+    write_ad9361_reg(device, 0x016, 0x02);
+    while(read_ad9361_reg(device, 0x016) & 0x02) {
+        if(count > 100) {
+            post_err_msg("RF DC Offset Calibration Failure");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(50);
+    }
+}
+
+/* Start the RX quadrature calibration.
+ *
+ * Note that we are using AD9361's 'tracking' feature for RX quadrature
+ * calibration, so once it starts it continues to free-run during operation.
+ * It should be re-run for large frequency changes. */
+void calibrate_rx_quadrature(ad9361_device_t* device) {
+    /* Configure RX Quadrature calibration settings. */
+    write_ad9361_reg(device, 0x168, 0x03); // Set tone level for cal
+    write_ad9361_reg(device, 0x16e, 0x25); // RX Gain index to use for cal
+    write_ad9361_reg(device, 0x16a, 0x75); // Set Kexp phase
+    write_ad9361_reg(device, 0x16b, 0x15); // Set Kexp amplitude
+    write_ad9361_reg(device, 0x169, 0xcf); // Continuous tracking mode
+    write_ad9361_reg(device, 0x18b, 0xad);
+}
+
+/* TX quadtrature calibration routine.
+ *
+ * The TX quadrature needs to be done twice, once for each TX chain, with
+ * only one register change in between. Thus, this function enacts the
+ * calibrations, and it is called from calibrate_tx_quadrature. */
+void tx_quadrature_cal_routine(ad9361_device_t* device) {
+
+    /* This is a weird process, but here is how it works:
+     * 1) Read the calibrated NCO frequency bits out of 0A3.
+     * 2) Write the two bits to the RX NCO freq part of 0A0.
+     * 3) Re-read 0A3 to get bits [5:0] because maybe they changed?
+     * 4) Update only the TX NCO freq bits in 0A3.
+     * 5) Profit (I hope). */
+    uint8_t reg0a3 = read_ad9361_reg(device, 0x0a3);
+    uint8_t nco_freq = (reg0a3 & 0xC0);
+    write_ad9361_reg(device, 0x0a0, 0x15 | (nco_freq >> 1));
+    reg0a3 = read_ad9361_reg(device, 0x0a3);
+    write_ad9361_reg(device, 0x0a3, (reg0a3 & 0x3F) | nco_freq);
+
+    /* It is possible to reach a configuration that won't operate correctly,
+     * where the two test tones used for quadrature calibration are outside
+     * of the RX BBF, and therefore don't make it to the ADC. We will check
+     * for that scenario here. */
+    double max_cal_freq = (((device->baseband_bw * device->tfir_factor) * ((nco_freq >> 6) + 1)) / 32) * 2;
+    double bbbw = device->baseband_bw / 2.0; // bbbw represents the one-sided BW
+    if(bbbw > 28e6) {
+        bbbw = 28e6;
+    } else if (bbbw < 0.20e6) {
+        bbbw = 0.20e6;
+    }
+    if (max_cal_freq > bbbw )
+        post_err_msg("max_cal_freq > bbbw");
+
+    write_ad9361_reg(device, 0x0a1, 0x7B); // Set tracking coefficient
+    write_ad9361_reg(device, 0x0a9, 0xff); // Cal count
+    write_ad9361_reg(device, 0x0a2, 0x7f); // Cal Kexp
+    write_ad9361_reg(device, 0x0a5, 0x01); // Cal magnitude threshold VVVV
+    write_ad9361_reg(device, 0x0a6, 0x01);
+
+    /* The gain table index used for calibration must be adjusted for the
+     * mid-table to get a TIA index = 1 and LPF index = 0. */
+    if((device->rx_freq >= 1300e6) && (device->rx_freq < 4000e6)) {
+        write_ad9361_reg(device, 0x0aa, 0x22); // Cal gain table index
+    } else {
+        write_ad9361_reg(device, 0x0aa, 0x25); // Cal gain table index
+    }
+
+    write_ad9361_reg(device, 0x0a4, 0xf0); // Cal setting conut
+    write_ad9361_reg(device, 0x0ae, 0x00); // Cal LPF gain index (split mode)
+
+    /* First, calibrate the baseband DC offset. */
+    calibrate_baseband_dc_offset(device);
+
+    /* Second, calibrate the RF DC offset. */
+    calibrate_rf_dc_offset(device);
+
+    /* Now, calibrate the TX quadrature! */
+    int count = 0;
+    write_ad9361_reg(device, 0x016, 0x10);
+    while(read_ad9361_reg(device, 0x016) & 0x10) {
+        if(count > 100) {
+            post_err_msg("TX Quadrature Calibration Failure");
+            break;
+        }
+
+        count++;
+        ad9361_msleep(10);
+    }
+}
+
+/* Run the TX quadrature calibration.
+ *
+ * Note that from within this function we are also triggering the baseband
+ * and RF DC calibrations. */
+void calibrate_tx_quadrature(ad9361_device_t* device) {
+    /* Make sure we are, in fact, in the ALERT state. If not, something is
+     * terribly wrong in the driver execution flow. */
+    if((read_ad9361_reg(device, 0x017) & 0x0F) != 5) {
+        post_err_msg("TX Quad Cal started, but not in ALERT");
+    }
+
+    /* Turn off free-running and continuous calibrations. Note that this
+     * will get turned back on at the end of the RX calibration routine. */
+    write_ad9361_reg(device, 0x169, 0xc0);
+
+    /* This calibration must be done in a certain order, and for both TX_A
+     * and TX_B, separately. Store the original setting so that we can
+     * restore it later. */
+    uint8_t orig_reg_inputsel = device->regs.inputsel;
+
+    /***********************************************************************
+     * TX1/2-A Calibration
+     **********************************************************************/
+    device->regs.inputsel = device->regs.inputsel & 0xBF;
+    write_ad9361_reg(device, 0x004, device->regs.inputsel);
+
+    tx_quadrature_cal_routine(device);
+
+    /***********************************************************************
+     * TX1/2-B Calibration
+     **********************************************************************/
+    device->regs.inputsel = device->regs.inputsel | 0x40;
+    write_ad9361_reg(device, 0x004, device->regs.inputsel);
+
+    tx_quadrature_cal_routine(device);
+
+    /***********************************************************************
+     * fin
+     **********************************************************************/
+    device->regs.inputsel = orig_reg_inputsel;
+    write_ad9361_reg(device, 0x004, orig_reg_inputsel);
+}
+
+
+/***********************************************************************
+ * Other Misc Setup Functions
+ ***********************************************************************/
+
+/* Program the mixer gain table.
+ *
+ * Note that this table is fixed for all frequency settings. */
+void program_mixer_gm_subtable(ad9361_device_t* device) {
+    uint8_t gain[] = {0x78, 0x74, 0x70, 0x6C, 0x68, 0x64, 0x60, 0x5C, 0x58,
+                      0x54, 0x50, 0x4C, 0x48, 0x30, 0x18, 0x00};
+    uint8_t gm[] = {0x00, 0x0D, 0x15, 0x1B, 0x21, 0x25, 0x29, 0x2C, 0x2F,
+                    0x31, 0x33, 0x34, 0x35, 0x3A, 0x3D, 0x3E};
+
+    /* Start the clock. */
+    write_ad9361_reg(device, 0x13f, 0x02);
+
+    /* Program the GM Sub-table. */
+    int i;
+    for(i = 15; i >= 0; i--) {
+        write_ad9361_reg(device, 0x138, i);
+        write_ad9361_reg(device, 0x139, gain[(15 - i)]);
+        write_ad9361_reg(device, 0x13A, 0x00);
+        write_ad9361_reg(device, 0x13B, gm[(15 - i)]);
+        write_ad9361_reg(device, 0x13F, 0x06);
+        write_ad9361_reg(device, 0x13C, 0x00);
+        write_ad9361_reg(device, 0x13C, 0x00);
+    }
+
+    /* Clear write bit and stop clock. */
+    write_ad9361_reg(device, 0x13f, 0x02);
+    write_ad9361_reg(device, 0x13C, 0x00);
+    write_ad9361_reg(device, 0x13C, 0x00);
+    write_ad9361_reg(device, 0x13f, 0x00);
+}
+
+/* Program the gain table.
+ *
+ * There are three different gain tables for different frequency ranges! */
+void program_gain_table(ad9361_device_t* device) {
+
+    /* Figure out which gain table we should be using for our current
+     * frequency band. */
+    uint8_t (*gain_table)[5] = NULL;
+    uint8_t new_gain_table;
+    if(device->rx_freq  < 1300e6) {
+        gain_table = gain_table_sub_1300mhz;
+        new_gain_table = 1;
+    } else if(device->rx_freq < 4e9) {
+        gain_table = gain_table_1300mhz_to_4000mhz;
+        new_gain_table = 2;
+    } else if(device->rx_freq <= 6e9) {
+        gain_table = gain_table_4000mhz_to_6000mhz;
+        new_gain_table = 3;
+    } else {
+        post_err_msg("Wrong _rx_freq value");
+        new_gain_table = 1;
+    }
+
+    /* Only re-program the gain table if there has been a band change. */
+    if(device->curr_gain_table == new_gain_table) {
+        return;
+    } else {
+        device->curr_gain_table = new_gain_table;
+    }
+
+    /* Okay, we have to program a new gain table. Sucks, brah. Start the
+     * gain table clock. */
+    write_ad9361_reg(device, 0x137, 0x1A);
+
+    /* IT'S PROGRAMMING TIME. */
+    uint8_t index = 0;
+    for(; index < 77; index++) {
+        write_ad9361_reg(device, 0x130, index);
+        write_ad9361_reg(device, 0x131, gain_table[index][1]);
+        write_ad9361_reg(device, 0x132, gain_table[index][2]);
+        write_ad9361_reg(device, 0x133, gain_table[index][3]);
+        write_ad9361_reg(device, 0x137, 0x1E);
+        write_ad9361_reg(device, 0x134, 0x00);
+        write_ad9361_reg(device, 0x134, 0x00);
+    }
+
+    /* Everything above the 77th index is zero. */
+    for(; index < 91; index++) {
+        write_ad9361_reg(device, 0x130, index);
+        write_ad9361_reg(device, 0x131, 0x00);
+        write_ad9361_reg(device, 0x132, 0x00);
+        write_ad9361_reg(device, 0x133, 0x00);
+        write_ad9361_reg(device, 0x137, 0x1E);
+        write_ad9361_reg(device, 0x134, 0x00);
+        write_ad9361_reg(device, 0x134, 0x00);
+    }
+
+    /* Clear the write bit and stop the gain clock. */
+    write_ad9361_reg(device, 0x137, 0x1A);
+    write_ad9361_reg(device, 0x134, 0x00);
+    write_ad9361_reg(device, 0x134, 0x00);
+    write_ad9361_reg(device, 0x137, 0x00);
+}
+
+/* Setup gain control registers.
+ *
+ * This really only needs to be done once, at initialization. */
+void setup_gain_control(ad9361_device_t* device)
+{
+    write_ad9361_reg(device, 0x0FA, 0xE0); // Gain Control Mode Select
+    write_ad9361_reg(device, 0x0FB, 0x08); // Table, Digital Gain, Man Gain Ctrl
+    write_ad9361_reg(device, 0x0FC, 0x23); // Incr Step Size, ADC Overrange Size
+    write_ad9361_reg(device, 0x0FD, 0x4C); // Max Full/LMT Gain Table Index
+    write_ad9361_reg(device, 0x0FE, 0x44); // Decr Step Size, Peak Overload Time
+    write_ad9361_reg(device, 0x100, 0x6F); // Max Digital Gain
+    write_ad9361_reg(device, 0x104, 0x2F); // ADC Small Overload Threshold
+    write_ad9361_reg(device, 0x105, 0x3A); // ADC Large Overload Threshold
+    write_ad9361_reg(device, 0x107, 0x31); // Large LMT Overload Threshold
+    write_ad9361_reg(device, 0x108, 0x39); // Small LMT Overload Threshold
+    write_ad9361_reg(device, 0x109, 0x23); // Rx1 Full/LMT Gain Index
+    write_ad9361_reg(device, 0x10A, 0x58); // Rx1 LPF Gain Index
+    write_ad9361_reg(device, 0x10B, 0x00); // Rx1 Digital Gain Index
+    write_ad9361_reg(device, 0x10C, 0x23); // Rx2 Full/LMT Gain Index
+    write_ad9361_reg(device, 0x10D, 0x18); // Rx2 LPF Gain Index
+    write_ad9361_reg(device, 0x10E, 0x00); // Rx2 Digital Gain Index
+    write_ad9361_reg(device, 0x114, 0x30); // Low Power Threshold
+    write_ad9361_reg(device, 0x11A, 0x27); // Initial LMT Gain Limit
+    write_ad9361_reg(device, 0x081, 0x00); // Tx Symbol Gain Control
+}
+
+/* Setup the RX or TX synthesizers.
+ *
+ * This setup depends on a fixed look-up table, which is stored in an
+ * included header file. The table is indexed based on the passed VCO rate.
+ */
+void setup_synth(ad9361_device_t* device, int which, double vcorate) {
+    /* The vcorates in the vco_index array represent lower boundaries for
+     * rates. Once we find a match, we use that index to look-up the rest of
+     * the register values in the LUT. */
+    int vcoindex = 0;
+    int i;
+    for(i = 0; i < 53; i++) {
+        vcoindex = i;
+        if(vcorate > vco_index[i]) {
+            break;
+        }
+    }
+
+    if (vcoindex > 53)
+        post_err_msg("vcoindex > 53");
+
+    /* Parse the values out of the LUT based on our calculated index... */
+    uint8_t vco_output_level = synth_cal_lut[vcoindex][0];
+    uint8_t vco_varactor = synth_cal_lut[vcoindex][1];
+    uint8_t vco_bias_ref = synth_cal_lut[vcoindex][2];
+    uint8_t vco_bias_tcf = synth_cal_lut[vcoindex][3];
+    uint8_t vco_cal_offset = synth_cal_lut[vcoindex][4];
+    uint8_t vco_varactor_ref = synth_cal_lut[vcoindex][5];
+    uint8_t charge_pump_curr = synth_cal_lut[vcoindex][6];
+    uint8_t loop_filter_c2 = synth_cal_lut[vcoindex][7];
+    uint8_t loop_filter_c1 = synth_cal_lut[vcoindex][8];
+    uint8_t loop_filter_r1 = synth_cal_lut[vcoindex][9];
+    uint8_t loop_filter_c3 = synth_cal_lut[vcoindex][10];
+    uint8_t loop_filter_r3 = synth_cal_lut[vcoindex][11];
+
+    /* ... annnd program! */
+    if(which == RX_TYPE) {
+        write_ad9361_reg(device, 0x23a, 0x40 | vco_output_level);
+        write_ad9361_reg(device, 0x239, 0xC0 | vco_varactor);
+        write_ad9361_reg(device, 0x242, vco_bias_ref | (vco_bias_tcf << 3));
+        write_ad9361_reg(device, 0x238, (vco_cal_offset << 3));
+        write_ad9361_reg(device, 0x245, 0x00);
+        write_ad9361_reg(device, 0x251, vco_varactor_ref);
+        write_ad9361_reg(device, 0x250, 0x70);
+        write_ad9361_reg(device, 0x23b, 0x80 | charge_pump_curr);
+        write_ad9361_reg(device, 0x23e, loop_filter_c1 | (loop_filter_c2 << 4));
+        write_ad9361_reg(device, 0x23f, loop_filter_c3 | (loop_filter_r1 << 4));
+        write_ad9361_reg(device, 0x240, loop_filter_r3);
+    } else if(which == TX_TYPE) {
+        write_ad9361_reg(device, 0x27a, 0x40 | vco_output_level);
+        write_ad9361_reg(device, 0x279, 0xC0 | vco_varactor);
+        write_ad9361_reg(device, 0x282, vco_bias_ref | (vco_bias_tcf << 3));
+        write_ad9361_reg(device, 0x278, (vco_cal_offset << 3));
+        write_ad9361_reg(device, 0x285, 0x00);
+        write_ad9361_reg(device, 0x291, vco_varactor_ref);
+        write_ad9361_reg(device, 0x290, 0x70);
+        write_ad9361_reg(device, 0x27b, 0x80 | charge_pump_curr);
+        write_ad9361_reg(device, 0x27e, loop_filter_c1 | (loop_filter_c2 << 4));
+        write_ad9361_reg(device, 0x27f, loop_filter_c3 | (loop_filter_r1 << 4));
+        write_ad9361_reg(device, 0x280, loop_filter_r3);
+    } else {
+        post_err_msg("[setup_synth] INVALID_CODE_PATH");
+    }
+}
+
+
+/* Tune the baseband VCO.
+ *
+ * This clock signal is what gets fed to the ADCs and DACs. This function is
+ * not exported outside of this file, and is invoked based on the rate
+ * fed to the public set_clock_rate function. */
+double tune_bbvco(ad9361_device_t* device, const double rate) {
+    msg("[tune_bbvco] rate=%.10f", rate);
+
+    /* Let's not re-tune to the same frequency over and over... */
+    if(freq_is_nearly_equal(rate, device->req_coreclk)) {
+        return device->adcclock_freq;
+    }
+
+    device->req_coreclk = rate;
+
+    const double fref = 40e6;
+    const int modulus = 2088960;
+    const double vcomax = 1430e6;
+    const double vcomin = 672e6;
+    double vcorate;
+    int vcodiv;
+
+    /* Iterate over VCO dividers until appropriate divider is found. */
+    int i = 1;
+    for(; i <= 6; i++) {
+        vcodiv = 1 << i;
+        vcorate = rate * vcodiv;
+
+        if(vcorate >= vcomin && vcorate <= vcomax) break;
+    }
+    if(i == 7)
+        post_err_msg("tune_bbvco: wrong vcorate");
+
+    msg("[tune_bbvco] vcodiv=%d vcorate=%.10f", vcodiv, vcorate);
+
+    /* Fo = Fref * (Nint + Nfrac / mod) */
+    int nint = vcorate / fref;
+    msg("[tune_bbvco] (nint)=%.10f", (vcorate / fref));
+    int nfrac = lround(((vcorate / fref) - (double)nint) * (double)modulus);
+    msg("[tune_bbvco] (nfrac)=%.10f", (((vcorate / fref) - (double)nint) * (double)modulus));
+    msg("[tune_bbvco] nint=%d nfrac=%d", nint, nfrac);
+    double actual_vcorate = fref * ((double)nint + ((double)nfrac / (double)modulus));
+
+    /* Scale CP current according to VCO rate */
+    const double icp_baseline = 150e-6;
+    const double freq_baseline = 1280e6;
+    double icp = icp_baseline * (actual_vcorate / freq_baseline);
+    int icp_reg = (icp / 25e-6) - 1;
+
+    write_ad9361_reg(device, 0x045, 0x00);            // REFCLK / 1 to BBPLL
+    write_ad9361_reg(device, 0x046, icp_reg & 0x3F);  // CP current
+    write_ad9361_reg(device, 0x048, 0xe8);            // BBPLL loop filters
+    write_ad9361_reg(device, 0x049, 0x5b);            // BBPLL loop filters
+    write_ad9361_reg(device, 0x04a, 0x35);            // BBPLL loop filters
+
+    write_ad9361_reg(device, 0x04b, 0xe0);
+    write_ad9361_reg(device, 0x04e, 0x10);            // Max accuracy
+
+    write_ad9361_reg(device, 0x043, nfrac & 0xFF);         // Nfrac[7:0]
+    write_ad9361_reg(device, 0x042, (nfrac >> 8) & 0xFF);  // Nfrac[15:8]
+    write_ad9361_reg(device, 0x041, (nfrac >> 16) & 0xFF); // Nfrac[23:16]
+    write_ad9361_reg(device, 0x044, nint);                 // Nint
+
+    calibrate_lock_bbpll(device);
+
+    device->regs.bbpll = (device->regs.bbpll & 0xF8) | i;
+
+    device->bbpll_freq = actual_vcorate;
+    device->adcclock_freq = (actual_vcorate / vcodiv);
+
+    return device->adcclock_freq;
+}
+
+/* This function re-programs all of the gains in the system.
+ *
+ * Because the gain values match to different gain indices based on the
+ * current operating band, this function can be called to update all gain
+ * settings to the appropriate index after a re-tune. */
+void program_gains(uint64_t handle) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+    set_gain(handle, RX_TYPE,1, device->rx1_gain);
+    set_gain(handle, RX_TYPE,2, device->rx2_gain);
+    set_gain(handle, TX_TYPE,1, device->tx1_gain);
+    set_gain(handle, TX_TYPE,2, device->tx2_gain);
+}
+
+/* This is the internal tune function, not available for a host call.
+ *
+ * Calculate the VCO settings for the requested frquency, and then either
+ * tune the RX or TX VCO. */
+double tune_helper(ad9361_device_t* device, int which, const double value) {
+
+    /* The RFPLL runs from 6 GHz - 12 GHz */
+    const double fref = 80e6;
+    const int modulus = 8388593;
+    const double vcomax = 12e9;
+    const double vcomin = 6e9;
+    double vcorate;
+    int vcodiv;
+
+    /* Iterate over VCO dividers until appropriate divider is found. */
+    int i;
+    for(i = 0; i <= 6; i++) {
+        vcodiv = 2 << i;
+        vcorate = value * vcodiv;
+        if(vcorate >= vcomin && vcorate <= vcomax) break;
+    }
+    if(i == 7)
+        post_err_msg("RFVCO can't find valid VCO rate!");
+
+    int nint = vcorate / fref;
+    int nfrac = ((vcorate / fref) - nint) * modulus;
+
+    double actual_vcorate = fref * (nint + (double)(nfrac)/modulus);
+    double actual_lo = actual_vcorate / vcodiv;
+
+    if(which == RX_TYPE) {
+
+        device->req_rx_freq = value;
+
+        /* Set band-specific settings. */
+        if(value < ad9361_client_get_band_edge(device->product, AD9361_RX_BAND0)) {
+            device->regs.inputsel = (device->regs.inputsel & 0xC0) | 0x30;
+        } else if((value >= ad9361_client_get_band_edge(device->product, AD9361_RX_BAND0)) &&
+                  (value < ad9361_client_get_band_edge(device->product, AD9361_RX_BAND1))) {
+            device->regs.inputsel = (device->regs.inputsel & 0xC0) | 0x0C;
+        } else if((value >= ad9361_client_get_band_edge(device->product, AD9361_RX_BAND1)) &&
+                  (value <= 6e9)) {
+            device->regs.inputsel = (device->regs.inputsel & 0xC0) | 0x03;
+        } else {
+            post_err_msg("[tune_helper] INVALID_CODE_PATH");
+        }
+
+        write_ad9361_reg(device, 0x004, device->regs.inputsel);
+
+        /* Store vcodiv setting. */
+        device->regs.vcodivs = (device->regs.vcodivs & 0xF0) | (i & 0x0F);
+
+        /* Setup the synthesizer. */
+        setup_synth(device, RX_TYPE, actual_vcorate);
+
+        /* Tune!!!! */
+        write_ad9361_reg(device, 0x233, nfrac & 0xFF);
+        write_ad9361_reg(device, 0x234, (nfrac >> 8) & 0xFF);
+        write_ad9361_reg(device, 0x235, (nfrac >> 16) & 0xFF);
+        write_ad9361_reg(device, 0x232, (nint >> 8) & 0xFF);
+        write_ad9361_reg(device, 0x231, nint & 0xFF);
+        write_ad9361_reg(device, 0x005, device->regs.vcodivs);
+
+        /* Lock the PLL! */
+        ad9361_msleep(2);
+        if((read_ad9361_reg(device, 0x247) & 0x02) == 0) {
+            post_err_msg("RX PLL NOT LOCKED");
+        }
+
+        device->rx_freq = actual_lo;
+
+        return actual_lo;
+
+    } else {
+
+        device->req_tx_freq = value;
+
+        /* Set band-specific settings. */
+        if(value < ad9361_client_get_band_edge(device->product, AD9361_TX_BAND0)) {
+            device->regs.inputsel = device->regs.inputsel | 0x40;
+        } else if((value >= ad9361_client_get_band_edge(device->product, AD9361_TX_BAND0)) &&
+                  (value <= 6e9)) {
+            device->regs.inputsel = device->regs.inputsel & 0xBF;
+        } else {
+            post_err_msg("[tune_helper] INVALID_CODE_PATH");
+        }
+
+        write_ad9361_reg(device, 0x004, device->regs.inputsel);
+
+        /* Store vcodiv setting. */
+        device->regs.vcodivs = (device->regs.vcodivs & 0x0F) | ((i & 0x0F) << 4);
+
+        /* Setup the synthesizer. */
+        setup_synth(device, TX_TYPE, actual_vcorate);
+
+        /* Tune it, homey. */
+        write_ad9361_reg(device, 0x273, nfrac & 0xFF);
+        write_ad9361_reg(device, 0x274, (nfrac >> 8) & 0xFF);
+        write_ad9361_reg(device, 0x275, (nfrac >> 16) & 0xFF);
+        write_ad9361_reg(device, 0x272, (nint >> 8) & 0xFF);
+        write_ad9361_reg(device, 0x271, nint & 0xFF);
+        write_ad9361_reg(device, 0x005, device->regs.vcodivs);
+
+        /* Lock the PLL! */
+        ad9361_msleep(2);
+        if((read_ad9361_reg(device, 0x287) & 0x02) == 0) {
+            post_err_msg("TX PLL NOT LOCKED");
+        }
+
+        device->tx_freq = actual_lo;
+
+        return actual_lo;
+    }
+}
+
+/* Configure the various clock / sample rates in the RX and TX chains.
+ *
+ * Functionally, this function configures AD9361's RX and TX rates. For
+ * a requested TX & RX rate, it sets the interpolation & decimation filters,
+ * and tunes the VCO that feeds the ADCs and DACs.
+ */
+double setup_rates(ad9361_device_t* device, const double rate) {
+
+    /* If we make it into this function, then we are tuning to a new rate.
+     * Store the new rate. */
+    device->req_clock_rate = rate;
+
+    /* Set the decimation and interpolation values in the RX and TX chains.
+     * This also switches filters in / out. Note that all transmitters and
+     * receivers have to be turned on for the calibration portion of
+     * bring-up, and then they will be switched out to reflect the actual
+     * user-requested antenna selections. */
+    int divfactor = 0;
+    device->tfir_factor = 0;
+    if(rate < 0.33e6) {
+        // RX1 + RX2 enabled, 3, 2, 2, 4
+        device->regs.rxfilt = B8( 11101111 ) ;
+
+        // TX1 + TX2 enabled, 3, 2, 2, 4
+        device->regs.txfilt = B8( 11101111 ) ;
+
+        divfactor = 48;
+        device->tfir_factor = 2;
+    } else if(rate < 0.66e6) {
+        // RX1 + RX2 enabled, 2, 2, 2, 4
+        device->regs.rxfilt = B8( 11011111 ) ;
+
+        // TX1 + TX2 enabled, 2, 2, 2, 4
+        device->regs.txfilt = B8( 11011111 ) ;
+
+        divfactor = 32;
+        device->tfir_factor = 2;
+    } else if(rate <= 20e6) {
+        // RX1 + RX2 enabled, 2, 2, 2, 2
+        device->regs.rxfilt = B8( 11011110 ) ;
+
+        // TX1 + TX2 enabled, 2, 2, 2, 2
+        device->regs.txfilt = B8( 11011110 ) ;
+
+        divfactor = 16;
+        device->tfir_factor = 2;
+    } else if((rate > 20e6) && (rate < 23e6)) {
+        // RX1 + RX2 enabled, 3, 2, 2, 2
+        device->regs.rxfilt = B8( 11101110 ) ;
+
+        // TX1 + TX2 enabled, 3, 1, 2, 2
+        device->regs.txfilt = B8( 11100110 ) ;
+
+        divfactor = 24;
+        device->tfir_factor = 2;
+    } else if((rate >= 23e6) && (rate < 41e6)) {
+        // RX1 + RX2 enabled, 2, 2, 2, 2
+        device->regs.rxfilt = B8( 11011110 ) ;
+
+        // TX1 + TX2 enabled, 1, 2, 2, 2
+        device->regs.txfilt = B8( 11001110 ) ;
+
+        divfactor = 16;
+        device->tfir_factor = 2;
+    } else if((rate >= 41e6) && (rate <= 56e6)) {
+        // RX1 + RX2 enabled, 3, 1, 2, 2
+        device->regs.rxfilt = B8( 11100110 ) ;
+
+        // TX1 + TX2 enabled, 3, 1, 1, 2
+        device->regs.txfilt = B8( 11100010 ) ;
+
+        divfactor = 12;
+        device->tfir_factor = 2;
+    } else if((rate > 56e6) && (rate <= 61.44e6)) {
+        // RX1 + RX2 enabled, 3, 1, 1, 2
+        device->regs.rxfilt = B8( 11100010 ) ;
+
+        // TX1 + TX2 enabled, 3, 1, 1, 1
+        device->regs.txfilt = B8( 11100001 ) ;
+
+        divfactor = 6;
+        device->tfir_factor = 1;
+    } else {
+        // should never get in here
+        post_err_msg("[setup_rates] INVALID_CODE_PATH");
+    }
+
+    msg("[setup_rates] divfactor=%d", divfactor);
+
+    /* Tune the BBPLL to get the ADC and DAC clocks. */
+    const double adcclk = tune_bbvco(device, rate * divfactor);
+    double dacclk = adcclk;
+
+    /* The DAC clock must be <= 336e6, and is either the ADC clock or 1/2 the
+     * ADC clock.*/
+    if(adcclk > 336e6) {
+        /* Make the DAC clock = ADC/2, and bypass the TXFIR. */
+        device->regs.bbpll = device->regs.bbpll | 0x08;
+        dacclk = adcclk / 2.0;
+    } else {
+        device->regs.bbpll = device->regs.bbpll & 0xF7;
+    }
+
+    /* Set the dividers / interpolators in AD9361. */
+    write_ad9361_reg(device, 0x002, device->regs.txfilt);
+    write_ad9361_reg(device, 0x003, device->regs.rxfilt);
+    write_ad9361_reg(device, 0x004, device->regs.inputsel);
+    write_ad9361_reg(device, 0x00A, device->regs.bbpll);
+
+    msg("[setup_rates] adcclk=%f", adcclk);
+    device->baseband_bw = (adcclk / divfactor);
+
+     /*
+      The Tx & Rx FIR calculate 16 taps per clock cycle. This limits the number of available taps to the ratio of DAC_CLK/ADC_CLK
+      to the input data rate multiplied by 16. For example, if the input data rate is 25 MHz and DAC_CLK is 100 MHz,
+      then the ratio of DAC_CLK to the input data rate is 100/25 or 4. In this scenario, the total number of taps available is 64.
+
+      Also, whilst the Rx FIR filter always has memory available for 128 taps, the Tx FIR Filter can only support a maximum length of 64 taps
+      in 1x interpolation mode, and 128 taps in 2x & 4x modes.
+    */
+    const int max_tx_taps = AD9361_MIN(AD9361_MIN((16 * (int)((dacclk / rate) + 0.5)), 128),
+				       (device->tfir_factor==1) ? 64 : 128);
+    const int max_rx_taps = AD9361_MIN((16 * (int)((adcclk / rate) + 0.5)), 128);
+
+    const int num_tx_taps = get_num_taps(max_tx_taps);
+    const int num_rx_taps = get_num_taps(max_rx_taps);
+
+    setup_tx_fir(device, num_tx_taps);
+    setup_rx_fir(device, num_rx_taps);
+
+    return device->baseband_bw;
+}
+
+/***********************************************************************
+ * Publicly exported functions to host calls
+ **********************************************************************/
+void init_ad9361(uint64_t handle) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+    /* Initialize shadow registers. */
+    device->regs.vcodivs = 0x00;
+    device->regs.inputsel = 0x30;
+    device->regs.rxfilt = 0x00;
+    device->regs.txfilt = 0x00;
+    device->regs.bbpll = 0x02;
+    device->regs.bbftune_config = 0x1e;
+    device->regs.bbftune_mode = 0x1e;
+
+    /* Initialize private VRQ fields. */
+    device->rx_freq = 0.0;
+    device->tx_freq = 0.0;
+    device->req_rx_freq = 0.0;
+    device->req_tx_freq = 0.0;
+    device->baseband_bw = 0.0;
+    device->req_clock_rate = 0.0;
+    device->req_coreclk = 0.0;
+    device->bbpll_freq = 0.0;
+    device->adcclock_freq = 0.0;
+    device->rx_bbf_tunediv = 0;
+    device->curr_gain_table = 0;
+    device->rx1_gain = 0;
+    device->rx2_gain = 0;
+    device->tx1_gain = 0;
+    device->tx2_gain = 0;
+
+    /* Reset the device. */
+    write_ad9361_reg(device, 0x000,0x01);
+    write_ad9361_reg(device, 0x000,0x00);
+    ad9361_msleep(20);
+
+    /* There is not a WAT big enough for this. */
+    write_ad9361_reg(device, 0x3df, 0x01);
+
+    write_ad9361_reg(device, 0x2a6, 0x0e); // Enable master bias
+    write_ad9361_reg(device, 0x2a8, 0x0e); // Set bandgap trim
+
+    /* Set RFPLL ref clock scale to REFCLK * 2 */
+    write_ad9361_reg(device, 0x2ab, 0x07);
+    write_ad9361_reg(device, 0x2ac, 0xff);
+
+    /* Enable clocks. */
+    switch (ad9361_client_get_clocking_mode(device->product)) {
+        case AD9361_XTAL_N_CLK_PATH: {
+            write_ad9361_reg(device, 0x009, 0x17);
+        } break;
+
+        case AD9361_XTAL_P_CLK_PATH: {
+            write_ad9361_reg(device, 0x009, 0x07);
+            write_ad9361_reg(device, 0x292, 0x08);
+            write_ad9361_reg(device, 0x293, 0x80);
+            write_ad9361_reg(device, 0x294, 0x00);
+            write_ad9361_reg(device, 0x295, 0x14);
+        } break;
+
+        default:
+            post_err_msg("NOT IMPLEMENTED");
+    }
+    ad9361_msleep(20);
+
+    /* Tune the BBPLL, write TX and RX FIRS. */
+    setup_rates(device, 50e6);
+
+    /* Setup data ports (FDD dual port DDR):
+     *      FDD dual port DDR CMOS no swap.
+     *      Force TX on one port, RX on the other. */
+    switch (ad9361_client_get_digital_interface_mode(device->product)) {
+        case AD9361_DDR_FDD_LVCMOS: {
+            write_ad9361_reg(device, 0x010, 0xc8);
+            write_ad9361_reg(device, 0x011, 0x00);
+            write_ad9361_reg(device, 0x012, 0x02);
+        } break;
+
+        case AD9361_DDR_FDD_LVDS: {
+            write_ad9361_reg(device, 0x010, 0xcc);
+            write_ad9361_reg(device, 0x011, 0x00);
+            write_ad9361_reg(device, 0x012, 0x10);
+
+            //LVDS Specific
+            write_ad9361_reg(device, 0x03C, 0x23);
+            write_ad9361_reg(device, 0x03D, 0xFF);
+            write_ad9361_reg(device, 0x03E, 0x0F);
+        } break;
+
+        default:
+            post_err_msg("NOT IMPLEMENTED");
+    }
+
+    /* Data delay for TX and RX data clocks */
+    digital_interface_delays_t timing = ad9361_client_get_digital_interface_timing(device->product);
+    uint8_t rx_delays = ((timing.rx_clk_delay & 0xF) << 4) | (timing.rx_data_delay & 0xF);
+    uint8_t tx_delays = ((timing.tx_clk_delay & 0xF) << 4) | (timing.tx_data_delay & 0xF);
+    write_ad9361_reg(device, 0x006, rx_delays);
+    write_ad9361_reg(device, 0x007, tx_delays);
+
+    /* Setup AuxDAC */
+    write_ad9361_reg(device, 0x018, 0x00); // AuxDAC1 Word[9:2]
+    write_ad9361_reg(device, 0x019, 0x00); // AuxDAC2 Word[9:2]
+    write_ad9361_reg(device, 0x01A, 0x00); // AuxDAC1 Config and Word[1:0]
+    write_ad9361_reg(device, 0x01B, 0x00); // AuxDAC2 Config and Word[1:0]
+    write_ad9361_reg(device, 0x022, 0x4A); // Invert Bypassed LNA
+    write_ad9361_reg(device, 0x023, 0xFF); // AuxDAC Manaul/Auto Control
+    write_ad9361_reg(device, 0x026, 0x00); // AuxDAC Manual Select Bit/GPO Manual Select
+    write_ad9361_reg(device, 0x030, 0x00); // AuxDAC1 Rx Delay
+    write_ad9361_reg(device, 0x031, 0x00); // AuxDAC1 Tx Delay
+    write_ad9361_reg(device, 0x032, 0x00); // AuxDAC2 Rx Delay
+    write_ad9361_reg(device, 0x033, 0x00); // AuxDAC2 Tx Delay
+
+    /* Setup AuxADC */
+    write_ad9361_reg(device, 0x00B, 0x00); // Temp Sensor Setup (Offset)
+    write_ad9361_reg(device, 0x00C, 0x00); // Temp Sensor Setup (Temp Window)
+    write_ad9361_reg(device, 0x00D, 0x03); // Temp Sensor Setup (Periodic Measure)
+    write_ad9361_reg(device, 0x00F, 0x04); // Temp Sensor Setup (Decimation)
+    write_ad9361_reg(device, 0x01C, 0x10); // AuxADC Setup (Clock Div)
+    write_ad9361_reg(device, 0x01D, 0x01); // AuxADC Setup (Decimation/Enable)
+
+    /* Setup control outputs. */
+    write_ad9361_reg(device, 0x035, 0x07);
+    write_ad9361_reg(device, 0x036, 0xFF);
+
+    /* Setup GPO */
+    write_ad9361_reg(device, 0x03a, 0x27); //set delay register
+    write_ad9361_reg(device, 0x020, 0x00); // GPO Auto Enable Setup in RX and TX
+    write_ad9361_reg(device, 0x027, 0x03); // GPO Manual and GPO auto value in ALERT
+    write_ad9361_reg(device, 0x028, 0x00); // GPO_0 RX Delay
+    write_ad9361_reg(device, 0x029, 0x00); // GPO_1 RX Delay
+    write_ad9361_reg(device, 0x02A, 0x00); // GPO_2 RX Delay
+    write_ad9361_reg(device, 0x02B, 0x00); // GPO_3 RX Delay
+    write_ad9361_reg(device, 0x02C, 0x00); // GPO_0 TX Delay
+    write_ad9361_reg(device, 0x02D, 0x00); // GPO_1 TX Delay
+    write_ad9361_reg(device, 0x02E, 0x00); // GPO_2 TX Delay
+    write_ad9361_reg(device, 0x02F, 0x00); // GPO_3 TX Delay
+
+    write_ad9361_reg(device, 0x261, 0x00); // RX LO power
+    write_ad9361_reg(device, 0x2a1, 0x00); // TX LO power
+    write_ad9361_reg(device, 0x248, 0x0b); // en RX VCO LDO
+    write_ad9361_reg(device, 0x288, 0x0b); // en TX VCO LDO
+    write_ad9361_reg(device, 0x246, 0x02); // pd RX cal Tcf
+    write_ad9361_reg(device, 0x286, 0x02); // pd TX cal Tcf
+    write_ad9361_reg(device, 0x249, 0x8e); // rx vco cal length
+    write_ad9361_reg(device, 0x289, 0x8e); // rx vco cal length
+    write_ad9361_reg(device, 0x23b, 0x80); // set RX MSB?, FIXME 0x89 magic cp
+    write_ad9361_reg(device, 0x27b, 0x80); // "" TX //FIXME 0x88 see above
+    write_ad9361_reg(device, 0x243, 0x0d); // set rx prescaler bias
+    write_ad9361_reg(device, 0x283, 0x0d); // "" TX
+
+    write_ad9361_reg(device, 0x23d, 0x00); // Clear half VCO cal clock setting
+    write_ad9361_reg(device, 0x27d, 0x00); // Clear half VCO cal clock setting
+
+    /* The order of the following process is EXTREMELY important. If the
+     * below functions are modified at all, device initialization and
+     * calibration might be broken in the process! */
+
+    write_ad9361_reg(device, 0x015, 0x04); // dual synth mode, synth en ctrl en
+    write_ad9361_reg(device, 0x014, 0x05); // use SPI for TXNRX ctrl, to ALERT, TX on
+    write_ad9361_reg(device, 0x013, 0x01); // enable ENSM
+    ad9361_msleep(1);
+
+    calibrate_synth_charge_pumps(device);
+
+    tune_helper(device, RX_TYPE, 800e6);
+    tune_helper(device, TX_TYPE, 850e6);
+
+    program_mixer_gm_subtable(device);
+    program_gain_table(device);
+    setup_gain_control(device);
+
+    calibrate_baseband_rx_analog_filter(device);
+    calibrate_baseband_tx_analog_filter(device);
+    calibrate_rx_TIAs(device);
+    calibrate_secondary_tx_filter(device);
+
+    setup_adc(device);
+
+    calibrate_tx_quadrature(device);
+    calibrate_rx_quadrature(device);
+
+    // cals done, set PPORT config
+    switch (ad9361_client_get_digital_interface_mode(device->product)) {
+        case AD9361_DDR_FDD_LVCMOS: {
+            write_ad9361_reg(device, 0x012, 0x02);
+        } break;
+
+        case AD9361_DDR_FDD_LVDS: {
+            write_ad9361_reg(device, 0x012, 0x10);
+        } break;
+
+        default:
+            post_err_msg("NOT IMPLEMENTED");
+    }
+
+    write_ad9361_reg(device, 0x013, 0x01); // Set ENSM FDD bit
+    write_ad9361_reg(device, 0x015, 0x04); // dual synth mode, synth en ctrl en
+
+    /* Default TX attentuation to 10dB on both TX1 and TX2 */
+    write_ad9361_reg(device, 0x073, 0x00);
+    write_ad9361_reg(device, 0x074, 0x00);
+    write_ad9361_reg(device, 0x075, 0x00);
+    write_ad9361_reg(device, 0x076, 0x00);
+
+    /* Setup RSSI Measurements */
+    write_ad9361_reg(device, 0x150, 0x0E); // RSSI Measurement Duration 0, 1
+    write_ad9361_reg(device, 0x151, 0x00); // RSSI Measurement Duration 2, 3
+    write_ad9361_reg(device, 0x152, 0xFF); // RSSI Weighted Multiplier 0
+    write_ad9361_reg(device, 0x153, 0x00); // RSSI Weighted Multiplier 1
+    write_ad9361_reg(device, 0x154, 0x00); // RSSI Weighted Multiplier 2
+    write_ad9361_reg(device, 0x155, 0x00); // RSSI Weighted Multiplier 3
+    write_ad9361_reg(device, 0x156, 0x00); // RSSI Delay
+    write_ad9361_reg(device, 0x157, 0x00); // RSSI Wait
+    write_ad9361_reg(device, 0x158, 0x0D); // RSSI Mode Select
+    write_ad9361_reg(device, 0x15C, 0x67); // Power Measurement Duration
+
+    /* Turn on the default RX & TX chains. */
+    set_active_chains(handle, true, false, false, false);
+
+    /* Set TXers & RXers on (only works in FDD mode) */
+    write_ad9361_reg(device, 0x014, 0x21);
+}
+
+
+/* This function sets the RX / TX rate between AD9361 and the FPGA, and
+ * thus determines the interpolation / decimation required in the FPGA to
+ * achieve the user's requested rate.
+ *
+ * This is the only clock setting function that is exposed to the outside. */
+double set_clock_rate(uint64_t handle, const double req_rate) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+
+    if(req_rate > 61.44e6) {
+        post_err_msg("Requested master clock rate outside range");
+    }
+
+    msg("[set_clock_rate] req_rate=%.10f", req_rate);
+
+    /* UHD has a habit of requesting the same rate like four times when it
+     * starts up. This prevents that, and any bugs in user code that request
+     * the same rate over and over. */
+    if(freq_is_nearly_equal(req_rate, device->req_clock_rate)) {
+        return device->baseband_bw;
+    }
+
+    /* We must be in the SLEEP / WAIT state to do this. If we aren't already
+     * there, transition the ENSM to State 0. */
+    uint8_t current_state = read_ad9361_reg(device, 0x017) & 0x0F;
+    switch(current_state) {
+        case 0x05:
+            /* We are in the ALERT state. */
+            write_ad9361_reg(device, 0x014, 0x21);
+            ad9361_msleep(5);
+            write_ad9361_reg(device, 0x014, 0x00);
+            break;
+
+        case 0x0A:
+            /* We are in the FDD state. */
+            write_ad9361_reg(device, 0x014, 0x00);
+            break;
+
+        default:
+            post_err_msg("[set_clock_rate:1] AD9361 in unknown state");
+            break;
+    };
+
+    /* Store the current chain / antenna selections so that we can restore
+     * them at the end of this routine; all chains will be enabled from
+     * within setup_rates for calibration purposes. */
+    uint8_t orig_tx_chains = device->regs.txfilt & 0xC0;
+    uint8_t orig_rx_chains = device->regs.rxfilt & 0xC0;
+
+    /* Call into the clock configuration / settings function. This is where
+     * all the hard work gets done. */
+    double rate = setup_rates(device, req_rate);
+
+    msg("[set_clock_rate] rate=%.10f", rate);
+
+    /* Transition to the ALERT state and calibrate everything. */
+    write_ad9361_reg(device, 0x015, 0x04); //dual synth mode, synth en ctrl en
+    write_ad9361_reg(device, 0x014, 0x05); //use SPI for TXNRX ctrl, to ALERT, TX on
+    write_ad9361_reg(device, 0x013, 0x01); //enable ENSM
+    ad9361_msleep(1);
+
+    calibrate_synth_charge_pumps(device);
+
+    tune_helper(device, RX_TYPE, device->rx_freq);
+    tune_helper(device, TX_TYPE, device->tx_freq);
+
+    program_mixer_gm_subtable(device);
+    program_gain_table(device);
+    setup_gain_control(device);
+    program_gains(handle);
+
+    calibrate_baseband_rx_analog_filter(device);
+    calibrate_baseband_tx_analog_filter(device);
+    calibrate_rx_TIAs(device);
+    calibrate_secondary_tx_filter(device);
+
+    setup_adc(device);
+
+    calibrate_tx_quadrature(device);
+    calibrate_rx_quadrature(device);
+
+    // cals done, set PPORT config
+    switch (ad9361_client_get_digital_interface_mode(device->product)) {
+        case AD9361_DDR_FDD_LVCMOS: {
+            write_ad9361_reg(device, 0x012, 0x02);
+        } break;
+
+        case AD9361_DDR_FDD_LVDS: {
+            write_ad9361_reg(device, 0x012, 0x10);
+        } break;
+
+        default:
+            post_err_msg("NOT IMPLEMENTED");
+    }
+    write_ad9361_reg(device, 0x013, 0x01); // Set ENSM FDD bit
+    write_ad9361_reg(device, 0x015, 0x04); // dual synth mode, synth en ctrl en
+
+    /* End the function in the same state as the entry state. */
+    switch(current_state) {
+        case 0x05:
+            /* We are already in ALERT. */
+            break;
+
+        case 0x0A:
+            /* Transition back to FDD, and restore the original antenna
+             * / chain selections. */
+            device->regs.txfilt = (device->regs.txfilt & 0x3F) | orig_tx_chains;
+            device->regs.rxfilt = (device->regs.rxfilt & 0x3F) | orig_rx_chains;
+
+            write_ad9361_reg(device, 0x002, device->regs.txfilt);
+            write_ad9361_reg(device, 0x003, device->regs.rxfilt);
+            write_ad9361_reg(device, 0x014, 0x21);
+            break;
+
+        default:
+            post_err_msg("[set_clock_rate:2] AD9361 in unknown state");
+            break;
+    };
+
+    return rate;
+}
+
+
+/* Set which of the four TX / RX chains provided by AD9361 are active.
+ *
+ * AD9361 provides two sets of chains, Side A and Side B. Each side
+ * provides one TX antenna, and one RX antenna. The B200 maintains the USRP
+ * standard of providing one antenna connection that is both TX & RX, and
+ * one that is RX-only - for each chain. Thus, the possible antenna and
+ * chain selections are:
+ *
+ *  B200 Antenna    AD9361 Side       AD9361 Chain
+ *  -------------------------------------------------------------------
+ *  TX / RX1        Side A              TX1 (when switched to TX)
+ *  TX / RX1        Side A              RX1 (when switched to RX)
+ *  RX1             Side A              RX1
+ *
+ *  TX / RX2        Side B              TX2 (when switched to TX)
+ *  TX / RX2        Side B              RX2 (when switched to RX)
+ *  RX2             Side B              RX2
+ */
+void set_active_chains(uint64_t handle, bool tx1, bool tx2, bool rx1, bool rx2) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+
+    /* Clear out the current active chain settings. */
+    device->regs.txfilt = device->regs.txfilt & 0x3F;
+    device->regs.rxfilt = device->regs.rxfilt & 0x3F;
+
+    /* Turn on the different chains based on the passed parameters. */
+    if(tx1) { device->regs.txfilt = device->regs.txfilt | 0x40; }
+    if(tx2) { device->regs.txfilt = device->regs.txfilt | 0x80; }
+    if(rx1) { device->regs.rxfilt = device->regs.rxfilt | 0x40; }
+    if(rx2) { device->regs.rxfilt = device->regs.rxfilt | 0x80; }
+
+    /* Check for FDD state */
+    uint8_t set_back_to_fdd = 0;
+    uint8_t ensm_state = read_ad9361_reg(device, 0x017) & 0x0F;
+    if (ensm_state == 0xA)   // FDD
+    {
+        /* Put into ALERT state (via the FDD flush state). */
+        write_ad9361_reg(device, 0x014, 0x01);
+        set_back_to_fdd = 1;
+    }
+
+    /* Wait for FDD flush state to complete (if necessary) */
+    while (ensm_state == 0xA || ensm_state == 0xB)
+        ensm_state = read_ad9361_reg(device, 0x017) & 0x0F;
+
+    /* Turn on / off the chains. */
+    write_ad9361_reg(device, 0x002, device->regs.txfilt);
+    write_ad9361_reg(device, 0x003, device->regs.rxfilt);
+
+    /* Put back into FDD state if necessary */
+    if (set_back_to_fdd)
+        write_ad9361_reg(device, 0x014, 0x21);
+}
+
+/* Tune the RX or TX frequency.
+ *
+ * This is the publicly-accessible tune function. It makes sure the tune
+ * isn't a redundant request, and if not, passes it on to the class's
+ * internal tune function.
+ *
+ * After tuning, it runs any appropriate calibrations. */
+double tune(uint64_t handle, int which, const double value) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+
+    if(which == RX_TYPE) {
+        if(freq_is_nearly_equal(value, device->req_rx_freq)) {
+            return device->rx_freq;
+        }
+
+    } else if(which == TX_TYPE) {
+        if(freq_is_nearly_equal(value, device->req_tx_freq)) {
+            return device->tx_freq;
+        }
+
+    } else {
+        post_err_msg("[tune] INVALID_CODE_PATH");
+    }
+
+    /* If we aren't already in the ALERT state, we will need to return to
+     * the FDD state after tuning. */
+    int not_in_alert = 0;
+    if((read_ad9361_reg(device, 0x017) & 0x0F) != 5) {
+        /* Force the device into the ALERT state. */
+        not_in_alert = 1;
+        write_ad9361_reg(device, 0x014, 0x01);
+    }
+
+    /* Tune the RF VCO! */
+    double tune_freq = tune_helper(device, which, value);
+
+    /* Run any necessary calibrations / setups */
+    if(which == RX_TYPE) {
+        program_gain_table(device);
+    }
+
+    /* Update the gain settings. */
+    program_gains(handle);
+
+    /* Run the calibration algorithms. */
+    calibrate_tx_quadrature(device);
+    calibrate_rx_quadrature(device);
+
+    /* If we were in the FDD state, return it now. */
+    if(not_in_alert) {
+        write_ad9361_reg(device, 0x014, 0x21);
+    }
+
+    return tune_freq;
+}
+
+/* Set the gain of RX1, RX2, TX1, or TX2.
+ *
+ * Note that the 'value' passed to this function is the actual gain value,
+ * _not_ the gain index. This is the opposite of the eval software's GUI!
+ * Also note that the RX chains are done in terms of gain, and the TX chains
+ * are done in terms of attenuation. */
+double set_gain(uint64_t handle, int which, int n, const double value) {
+    ad9361_device_t* device = get_ad9361_device(handle);
+
+    if(which == RX_TYPE) {
+        /* Indexing the gain tables requires an offset from the requested
+         * amount of total gain in dB:
+         *      < 1300MHz: dB + 5
+         *      >= 1300MHz and < 4000MHz: dB + 3
+         *      >= 4000MHz and <= 6000MHz: dB + 14
+         */
+        int gain_offset = 0;
+        if(device->rx_freq < 1300e6) {
+            gain_offset = 5;
+        } else if(device->rx_freq < 4000e6) {
+            gain_offset = 3;
+        } else {
+            gain_offset = 14;
+        }
+
+        int gain_index = value + gain_offset;
+
+        /* Clip the gain values to the proper min/max gain values. */
+        if(gain_index > 76) gain_index = 76;
+        if(gain_index < 0) gain_index = 0;
+
+        if(n == 1) {
+            device->rx1_gain = value;
+            write_ad9361_reg(device, 0x109, gain_index);
+        } else {
+            device->rx2_gain = value;
+            write_ad9361_reg(device, 0x10c, gain_index);
+        }
+
+        return gain_index - gain_offset;
+    } else {
+        /* Setting the below bits causes a change in the TX attenuation word
+         * to immediately take effect. */
+        write_ad9361_reg(device, 0x077, 0x40);
+        write_ad9361_reg(device, 0x07c, 0x40);
+
+        /* Each gain step is -0.25dB. Calculate the attenuation necessary
+         * for the requested gain, convert it into gain steps, then write
+         * the attenuation word. Max gain (so zero attenuation) is 89.75. */
+        double atten = AD9361_MAX_GAIN - value;
+        int attenreg = atten * 4;
+        if(n == 1) {
+            device->tx1_gain = value;
+            write_ad9361_reg(device, 0x073, attenreg & 0xFF);
+            write_ad9361_reg(device, 0x074, (attenreg >> 8) & 0x01);
+        } else {
+            device->tx2_gain = value;
+            write_ad9361_reg(device, 0x075, attenreg & 0xFF);
+            write_ad9361_reg(device, 0x076, (attenreg >> 8) & 0x01);
+        }
+        return AD9361_MAX_GAIN - ((double)(attenreg)/ 4);
+    }
+}
+
+/* This function is responsible to dispatch the vendor request call
+ * to the proper handler
+ */
+
+void ad9361_dispatch(const char* vrb, char* vrb_out)
+{
+    memcpy(vrb_out, vrb, AD9361_DISPATCH_PACKET_SIZE); //copy request to response memory
+    tmp_req_buffer = vrb_out;
+
+    //////////////////////////////////////////////
+
+    double ret_val = 0.0;
+    int mask = 0;
+
+    const ad9361_transaction_t *request = (const ad9361_transaction_t *)vrb;
+    ad9361_transaction_t *response = (ad9361_transaction_t *)vrb_out;
+
+    //msg("[dispatch_vrq] action=%d", request->action);
+    //msg("[dispatch_vrq] action=%f", (double)request->action);
+
+    switch (request->action) {
+        case AD9361_ACTION_ECHO:
+            break; // nothing to do
+        case AD9361_ACTION_INIT:
+            init_ad9361(request->handle);
+            break;
+        case AD9361_ACTION_SET_RX1_GAIN:
+            ret_val = set_gain(request->handle,RX_TYPE,1,ad9361_double_unpack(request->value.gain));
+            ad9361_double_pack(ret_val, response->value.gain);
+            break;
+        case AD9361_ACTION_SET_TX1_GAIN:
+            ret_val = set_gain(request->handle,TX_TYPE,1,ad9361_double_unpack(request->value.gain));
+            ad9361_double_pack(ret_val, response->value.gain);
+            break;
+        case AD9361_ACTION_SET_RX2_GAIN:
+            ret_val = set_gain(request->handle,RX_TYPE,2,ad9361_double_unpack(request->value.gain));
+            ad9361_double_pack(ret_val, response->value.gain);
+            break;
+        case AD9361_ACTION_SET_TX2_GAIN:
+            ret_val = set_gain(request->handle,TX_TYPE,2,ad9361_double_unpack(request->value.gain));
+            ad9361_double_pack(ret_val, response->value.gain);
+            break;
+        case AD9361_ACTION_SET_RX_FREQ:
+            ret_val = tune(request->handle,RX_TYPE, ad9361_double_unpack(request->value.freq));
+            ad9361_double_pack(ret_val, response->value.freq);
+            break;
+        case AD9361_ACTION_SET_TX_FREQ:
+            ret_val = tune(request->handle,TX_TYPE, ad9361_double_unpack(request->value.freq));
+            ad9361_double_pack(ret_val, response->value.freq);
+            break;
+        case AD9361_ACTION_SET_CODEC_LOOP:
+            data_port_loopback(request->handle,request->value.codec_loop != 0);
+            break;
+        case AD9361_ACTION_SET_CLOCK_RATE:
+            ret_val = set_clock_rate(request->handle,ad9361_double_unpack(request->value.rate));
+            ad9361_double_pack(ret_val, response->value.rate);
+            break;
+        case AD9361_ACTION_SET_ACTIVE_CHAINS:
+            mask = request->value.enable_mask;
+            set_active_chains(request->handle,mask & 1, mask & 2, mask & 4, mask & 8);
+            break;
+        default:
+            post_err_msg("[ad9361_dispatch] NOT IMPLEMENTED");
+            break;
+    }
+}