From 6100f62f901d166f4b3c55d938dd3a2bf53f2e46 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Sat, 28 Jul 2018 18:31:14 +0300
Subject: Start implementing init_baseband()

---
 src/lib.rs | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 69 insertions(+), 4 deletions(-)

(limited to 'src/lib.rs')

diff --git a/src/lib.rs b/src/lib.rs
index 9081273..71731e0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,8 +3,22 @@ extern crate libusb;
 use std::time::Duration;
 use libusb::{Direction, RequestType, Recipient};
 
+const BLOCK_DEMODB: u16 = 0;
 const BLOCK_USBB: u16 = 1;
+const BLOCK_SYSB: u16 = 2;
+const BLOCK_TUNB: u16 = 3;
+
 const ADDR_USB_SYSCTL: u16 = 0x2000;
+const ADDR_USB_CTRL: u16 = 0x2010;
+const ADDR_USB_STAT: u16 = 0x2014;
+const ADDR_USB_EPA_CFG: u16 = 0x2144;
+const ADDR_USB_EPA_CTL: u16 = 0x2148;
+const ADDR_USB_EPA_MAXPKT: u16 = 0x2158;
+const ADDR_USB_EPA_MAXPKT_2: u16 = 0x215a;
+const ADDR_USB_EPA_FIFO_CFG: u16 = 0x2160;
+
+const ADDR_SYS_DEMOD_CTL: u16 = 0x3000;
+const ADDR_SYS_DEMOD_CTL_1: u16 = 0x300b;
 
 const INTERFACE_ID: u8 = 0;
 const CTRL_TIMEOUT: Duration = Duration::from_millis(300);
@@ -16,7 +30,7 @@ const KNOWN_DEVICES: [(u16, u16, &str); 2] = [
 pub struct RtlSdr<'a> {
     ctx: &'a libusb::Context,
     dev: Option<libusb::DeviceHandle<'a>>,
-    iface_id: u8,
+    iface_id: u8
 }
 
 impl<'a> RtlSdr<'a> {
@@ -25,7 +39,7 @@ impl<'a> RtlSdr<'a> {
         RtlSdr {
             ctx,
             dev: None,
-            iface_id: INTERFACE_ID,
+            iface_id: INTERFACE_ID
         }
     }
 
@@ -48,6 +62,57 @@ impl<'a> RtlSdr<'a> {
         }
     }
 
+    fn init_baseband(&self, handle: &libusb::DeviceHandle) {
+        // init USB
+        self.write_reg(&handle, BLOCK_USBB, ADDR_USB_SYSCTL, 0x09, 1);
+        self.write_reg(&handle, BLOCK_USBB, ADDR_USB_EPA_MAXPKT, 0x0002, 2);
+        self.write_reg(&handle, BLOCK_USBB, ADDR_USB_EPA_CTL, 0x1002, 2);
+
+        // power on demod
+        self.write_reg(&handle, BLOCK_SYSB, ADDR_SYS_DEMOD_CTL_1, 0x22, 1);
+        self.write_reg(&handle, BLOCK_SYSB, ADDR_SYS_DEMOD_CTL, 0xe8, 1);
+
+        /* reset demod (bit 3, soft_rst) */
+        // rtlsdr_demod_write_reg(dev, 1, 0x01, 0x14, 1);
+        // rtlsdr_demod_write_reg(dev, 1, 0x01, 0x10, 1);
+
+        // /* disable spectrum inversion and adjacent channel rejection */
+        // rtlsdr_demod_write_reg(dev, 1, 0x15, 0x00, 1);
+        // rtlsdr_demod_write_reg(dev, 1, 0x16, 0x0000, 2);
+
+        // /* clear both DDC shift and IF frequency registers  */
+        // for (i = 0; i < 6; i++)
+        //     rtlsdr_demod_write_reg(dev, 1, 0x16 + i, 0x00, 1);
+
+        // rtlsdr_set_fir(dev);
+
+        // /* enable SDR mode, disable DAGC (bit 5) */
+        // rtlsdr_demod_write_reg(dev, 0, 0x19, 0x05, 1);
+
+        // /* init FSM state-holding register */
+        // rtlsdr_demod_write_reg(dev, 1, 0x93, 0xf0, 1);
+        // rtlsdr_demod_write_reg(dev, 1, 0x94, 0x0f, 1);
+
+        // /* disable AGC (en_dagc, bit 0) (this seems to have no effect) */
+        // rtlsdr_demod_write_reg(dev, 1, 0x11, 0x00, 1);
+
+        // /* disable RF and IF AGC loop */
+        // rtlsdr_demod_write_reg(dev, 1, 0x04, 0x00, 1);
+
+        // /* disable PID filter (enable_PID = 0) */
+        // rtlsdr_demod_write_reg(dev, 0, 0x61, 0x60, 1);
+
+        // /* opt_adc_iq = 0, default ADC_I/ADC_Q datapath */
+        // rtlsdr_demod_write_reg(dev, 0, 0x06, 0x80, 1);
+
+        // /* Enable Zero-IF mode (en_bbin bit), DC cancellation (en_dc_est),
+        // * IQ estimation/compensation (en_iq_comp, en_iq_est) */
+        // rtlsdr_demod_write_reg(dev, 1, 0xb1, 0x1b, 1);
+
+        // /* disable 4.096 MHz clock output on pin TP_CK0 */
+        // rtlsdr_demod_write_reg(dev, 0, 0x0d, 0x83, 1);
+    }
+
     pub fn init(&mut self) {
         for mut dev in self.ctx.devices().unwrap().iter() {
             let desc = dev.device_descriptor().unwrap();
@@ -71,11 +136,11 @@ impl<'a> RtlSdr<'a> {
                     let res = self.write_reg(&handle, BLOCK_USBB, ADDR_USB_SYSCTL, 0x09, 1);
                     // reset device is write didn't succeed
 
+                    self.init_baseband(&handle);
+
                     if has_kernel_driver {
                         handle.attach_kernel_driver(self.iface_id).ok();
                     }
-
-                    self.dev = Some(handle);
                 }
             }
         }
-- 
cgit v1.3.1