858 lines
19 KiB
C
858 lines
19 KiB
C
/*
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* rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver
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* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
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* Copyright (C) 2012 by Dimitri Stolnikov <horiz0n@gmx.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#ifndef _WIN32
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#include <unistd.h>
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#endif
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#include <libusb.h>
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/*
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* All libusb callback functions should be marked with the LIBUSB_CALL macro
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* to ensure that they are compiled with the same calling convention as libusb.
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*
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* If the macro isn't available in older libusb versions, we simply define it.
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*/
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#ifndef LIBUSB_CALL
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#define LIBUSB_CALL
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#endif
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#include <rtl-sdr.h>
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#include "tuner_e4000.h"
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#include "tuner_fc0012.h"
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#include "tuner_fc0013.h"
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#include "tuner_fc2580.h"
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typedef struct rtlsdr_tuner {
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int(*init)(void *);
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int(*exit)(void *);
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int(*tune)(void *, int freq /* Hz */);
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int(*set_bw)(void *, int bw /* Hz */);
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int(*set_gain)(void *, int gain /* dB */);
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int freq; /* Hz */
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int corr; /* ppm */
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int gain; /* dB */
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} rtlsdr_tuner_t;
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void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val);
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/* generic tuner interface functions, shall be moved to the tuner implementations */
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int e4k_init(void *dev) { return e4000_Initialize(dev); }
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int e4k_exit(void *dev) { return 0; }
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int e4k_tune(void *dev, int freq) { return e4000_SetRfFreqHz(dev, freq); }
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int e4k_set_bw(void *dev, int bw) { return e4000_SetBandwidthHz(dev, 8000000); }
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int e4k_set_gain(void *dev, int gain) { return 0; }
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int fc0012_init(void *dev) { return FC0012_Open(dev); }
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int fc0012_exit(void *dev) { return 0; }
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int fc0012_tune(void *dev, int freq) {
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unsigned int bw = 6;
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/* select V-band/U-band filter */
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rtlsdr_set_gpio_bit(dev, 6, (freq > 300000000) ? 1 : 0);
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return FC0012_SetFrequency(dev, freq/1000, bw & 0xff);
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}
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int fc0012_set_bw(void *dev, int bw) {
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unsigned long freq = ((rtlsdr_tuner_t *)dev)->freq;
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return FC0013_SetFrequency(dev, freq/1000, bw/1000000);
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}
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int fc0012_set_gain(void *dev, int gain) { return 0; }
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int fc0013_init(void *dev) { return FC0013_Open(dev); }
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int fc0013_exit(void *dev) { return 0; }
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int fc0013_tune(void *dev, int freq) {
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unsigned int bw = 6;
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return FC0013_SetFrequency(dev, freq/1000, bw & 0xff);
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}
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int fc0013_set_bw(void *dev, int bw) {
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unsigned long freq = ((rtlsdr_tuner_t *)dev)->freq;
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return FC0013_SetFrequency(dev, freq/1000, bw/1000000);
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}
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int fc0013_set_gain(void *dev, int gain) { return 0; }
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int fc2580_init(void *dev) { return fc2580_Initialize(dev); }
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int fc2580_exit(void *dev) { return 0; }
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int fc2580_tune(void *dev, int freq) { return fc2580_SetRfFreqHz(dev, freq); }
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int fc2580_set_bw(void *dev, int bw) { return fc2580_SetBandwidthMode(dev, 1); }
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int fc2580_set_gain(void *dev, int gain) { return 0; }
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enum rtlsdr_tuners {
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RTLSDR_TUNER_E4000,
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RTLSDR_TUNER_FC0012,
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RTLSDR_TUNER_FC0013,
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RTLSDR_TUNER_FC2580
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};
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static rtlsdr_tuner_t tuners[] = {
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{ e4k_init, e4k_exit, e4k_tune, e4k_set_bw, e4k_set_gain, 0, 0, 0 },
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{ fc0012_init, fc0012_exit, fc0012_tune, fc0012_set_bw, fc0012_set_gain, 0, 0, 0 },
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{ fc0013_init, fc0013_exit, fc0013_tune, fc0013_set_bw, fc0013_set_gain, 0, 0, 0 },
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{ fc2580_init, fc2580_exit, fc2580_tune, fc2580_set_bw, fc2580_set_gain, 0, 0, 0 },
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};
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typedef struct rtlsdr_device {
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uint16_t vid;
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uint16_t pid;
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const char *name;
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} rtlsdr_device_t;
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static rtlsdr_device_t devices[] = {
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{ 0x0bda, 0x2832, "Generic RTL2832U (e.g. hama nano)" },
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{ 0x0bda, 0x2838, "ezcap USB 2.0 DVB-T/DAB/FM dongle" },
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{ 0x0ccd, 0x00a9, "Terratec Cinergy T Stick Black (rev 1)" },
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{ 0x0ccd, 0x00b3, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
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{ 0x0ccd, 0x00e0, "Terratec NOXON DAB/DAB+ USB dongle (rev 2)" },
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{ 0x1f4d, 0xb803, "GTek T803" },
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{ 0x1f4d, 0xc803, "Lifeview LV5TDeluxe" },
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{ 0x1b80, 0xd3a4, "Twintech UT-40" },
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{ 0x1d19, 0x1101, "Dexatek DK DVB-T Dongle (Logilink VG0002A)" },
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{ 0x1d19, 0x1102, "Dexatek DK DVB-T Dongle (MSI DigiVox mini II V3.0)" },
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{ 0x1d19, 0x1103, "Dexatek Technology Ltd. DK 5217 DVB-T Dongle" },
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{ 0x0458, 0x707f, "Genius TVGo DVB-T03 USB dongle (Ver. B)" },
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{ 0x1b80, 0xd393, "GIGABYTE GT-U7300" },
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{ 0x1b80, 0xd395, "Peak 102569AGPK" },
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{ 0x1b80, 0xd39d, "SVEON STV20 DVB-T USB & FM" },
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};
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#define BUF_COUNT 32
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#define BUF_LENGTH (16 * 16384)
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struct rtlsdr_dev {
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libusb_context *ctx;
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struct libusb_device_handle *devh;
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struct libusb_transfer *xfer[BUF_COUNT];
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unsigned char *xfer_buf[BUF_COUNT];
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rtlsdr_async_read_cb_t cb;
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void *cb_ctx;
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int run_async;
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rtlsdr_tuner_t *tuner;
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int rate; /* Hz */
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};
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#define CRYSTAL_FREQ 28800000
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#define MAX_SAMP_RATE 3200000
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#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN)
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#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT)
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#define CTRL_TIMEOUT 300
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enum usb_reg {
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USB_SYSCTL = 0x2000,
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USB_CTRL = 0x2010,
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USB_STAT = 0x2014,
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USB_EPA_CFG = 0x2144,
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USB_EPA_CTL = 0x2148,
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USB_EPA_MAXPKT = 0x2158,
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USB_EPA_MAXPKT_2 = 0x215a,
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USB_EPA_FIFO_CFG = 0x2160,
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};
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enum sys_reg {
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DEMOD_CTL = 0x3000,
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GPO = 0x3001,
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GPI = 0x3002,
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GPOE = 0x3003,
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GPD = 0x3004,
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SYSINTE = 0x3005,
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SYSINTS = 0x3006,
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GP_CFG0 = 0x3007,
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GP_CFG1 = 0x3008,
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SYSINTE_1 = 0x3009,
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SYSINTS_1 = 0x300a,
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DEMOD_CTL_1 = 0x300b,
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IR_SUSPEND = 0x300c,
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};
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enum blocks {
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DEMODB = 0,
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USBB = 1,
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SYSB = 2,
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TUNB = 3,
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ROMB = 4,
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IRB = 5,
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IICB = 6,
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};
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int rtlsdr_read_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
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{
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int r;
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uint16_t index = (block << 8);
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r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, array, len, CTRL_TIMEOUT);
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return r;
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}
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int rtlsdr_write_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
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{
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int r;
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uint16_t index = (block << 8) | 0x10;
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r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, array, len, CTRL_TIMEOUT);
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return r;
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}
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int rtlsdr_i2c_write_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg, uint8_t val)
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{
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uint16_t addr = i2c_addr;
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uint8_t data[2];
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data[0] = reg;
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data[1] = val;
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return rtlsdr_write_array(dev, IICB, addr, (uint8_t *)&data, 2);
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}
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uint8_t rtlsdr_i2c_read_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg)
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{
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uint16_t addr = i2c_addr;
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uint8_t data;
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rtlsdr_write_array(dev, IICB, addr, ®, 1);
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rtlsdr_read_array(dev, IICB, addr, &data, 1);
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return data;
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}
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int rtlsdr_i2c_write(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
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{
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uint16_t addr = i2c_addr;
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if (!dev)
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return -1;
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return rtlsdr_write_array(dev, IICB, addr, buffer, len);
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}
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int rtlsdr_i2c_read(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
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{
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uint16_t addr = i2c_addr;
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if (!dev)
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return -1;
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return rtlsdr_read_array(dev, IICB, addr, buffer, len);
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}
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uint16_t rtlsdr_read_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = (block << 8);
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uint16_t reg;
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r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, CTRL_TIMEOUT);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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reg = (data[1] << 8) | data[0];
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return reg;
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}
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void rtlsdr_write_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint16_t val, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = (block << 8) | 0x10;
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if (len == 1)
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data[0] = val & 0xff;
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else
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data[0] = val >> 8;
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data[1] = val & 0xff;
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r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, CTRL_TIMEOUT);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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}
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uint16_t rtlsdr_demod_read_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = page;
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uint16_t reg;
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addr = (addr << 8) | 0x20;
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r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, CTRL_TIMEOUT);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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reg = (data[1] << 8) | data[0];
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return reg;
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}
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void rtlsdr_demod_write_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint16_t val, uint8_t len)
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{
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int r;
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unsigned char data[2];
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uint16_t index = 0x10 | page;
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addr = (addr << 8) | 0x20;
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if (len == 1)
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data[0] = val & 0xff;
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else
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data[0] = val >> 8;
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data[1] = val & 0xff;
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r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, CTRL_TIMEOUT);
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if (r < 0)
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fprintf(stderr, "%s failed\n", __FUNCTION__);
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rtlsdr_demod_read_reg(dev, 0x0a, 0x01, 1);
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}
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void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val)
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{
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uint8_t r;
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gpio = 1 << gpio;
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r = rtlsdr_read_reg(dev, SYSB, GPO, 1);
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r = val ? (r | gpio) : (r & ~gpio);
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rtlsdr_write_reg(dev, SYSB, GPO, r, 1);
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}
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void rtlsdr_set_gpio_output(rtlsdr_dev_t *dev, uint8_t gpio)
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{
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int r;
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gpio = 1 << gpio;
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r = rtlsdr_read_reg(dev, SYSB, GPD, 1);
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rtlsdr_write_reg(dev, SYSB, GPO, r & ~gpio, 1);
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r = rtlsdr_read_reg(dev, SYSB, GPOE, 1);
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rtlsdr_write_reg(dev, SYSB, GPOE, r | gpio, 1);
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}
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void rtlsdr_set_i2c_repeater(rtlsdr_dev_t *dev, int on)
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{
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rtlsdr_demod_write_reg(dev, 1, 0x01, on ? 0x18 : 0x10, 1);
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}
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void rtlsdr_init_baseband(rtlsdr_dev_t *dev)
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{
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unsigned int i;
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/* default FIR coefficients used for DAB/FM by the Windows driver,
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* the DVB driver uses different ones */
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uint8_t fir_coeff[] = {
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0xca, 0xdc, 0xd7, 0xd8, 0xe0, 0xf2, 0x0e, 0x35, 0x06, 0x50,
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0x9c, 0x0d, 0x71, 0x11, 0x14, 0x71, 0x74, 0x19, 0x41, 0x00,
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};
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/* initialize USB */
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rtlsdr_write_reg(dev, USBB, USB_SYSCTL, 0x09, 1);
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rtlsdr_write_reg(dev, USBB, USB_EPA_MAXPKT, 0x0002, 2);
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rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
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/* poweron demod */
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rtlsdr_write_reg(dev, SYSB, DEMOD_CTL_1, 0x22, 1);
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rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0xe8, 1);
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/* reset demod (bit 3, soft_rst) */
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rtlsdr_demod_write_reg(dev, 1, 0x01, 0x14, 1);
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rtlsdr_demod_write_reg(dev, 1, 0x01, 0x10, 1);
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/* disable spectrum inversion and adjacent channel rejection */
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rtlsdr_demod_write_reg(dev, 1, 0x15, 0x00, 1);
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rtlsdr_demod_write_reg(dev, 1, 0x16, 0x0000, 2);
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/* set IF-frequency to 0 Hz */
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rtlsdr_demod_write_reg(dev, 1, 0x19, 0x0000, 2);
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/* set FIR coefficients */
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for (i = 0; i < sizeof (fir_coeff); i++)
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rtlsdr_demod_write_reg(dev, 1, 0x1c + i, fir_coeff[i], 1);
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rtlsdr_demod_write_reg(dev, 0, 0x19, 0x25, 1);
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/* init FSM state-holding register */
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rtlsdr_demod_write_reg(dev, 1, 0x93, 0xf0, 1);
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/* disable AGC (en_dagc, bit 0) */
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rtlsdr_demod_write_reg(dev, 1, 0x11, 0x00, 1);
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/* disable PID filter (enable_PID = 0) */
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rtlsdr_demod_write_reg(dev, 0, 0x61, 0x60, 1);
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/* opt_adc_iq = 0, default ADC_I/ADC_Q datapath */
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rtlsdr_demod_write_reg(dev, 0, 0x06, 0x80, 1);
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/* Enable Zero-IF mode (en_bbin bit), DC cancellation (en_dc_est),
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* IQ estimation/compensation (en_iq_comp, en_iq_est) */
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rtlsdr_demod_write_reg(dev, 1, 0xb1, 0x1b, 1);
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}
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void rtlsdr_deinit_baseband(rtlsdr_dev_t *dev)
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{
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/* deinitialize tuner */
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rtlsdr_set_i2c_repeater(dev, 1);
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dev->tuner->exit(dev);
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rtlsdr_set_i2c_repeater(dev, 0);
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/* poweroff demodulator and ADCs */
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rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0x20, 1);
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}
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int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
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{
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int r;
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double f = (double) freq;
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if (!dev || !dev->tuner)
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return -1;
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rtlsdr_set_i2c_repeater(dev, 1);
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f *= 1.0 + dev->tuner->corr / 1e6;
|
|
r = dev->tuner->tune((void *)dev, (int) f);
|
|
|
|
rtlsdr_set_i2c_repeater(dev, 0);
|
|
|
|
if (!r)
|
|
dev->tuner->freq = freq;
|
|
|
|
return r;
|
|
}
|
|
|
|
int rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev || !dev->tuner)
|
|
return -1;
|
|
|
|
return dev->tuner->freq;
|
|
}
|
|
|
|
int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int ppm)
|
|
{
|
|
int r;
|
|
|
|
if (!dev || !dev->tuner)
|
|
return -1;
|
|
|
|
if (dev->tuner->corr == ppm)
|
|
return -1;
|
|
|
|
dev->tuner->corr = ppm;
|
|
|
|
/* retune to apply new correction value */
|
|
r = rtlsdr_set_center_freq(dev, dev->tuner->freq);
|
|
|
|
return r;
|
|
}
|
|
|
|
int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev || !dev->tuner)
|
|
return -1;
|
|
|
|
return dev->tuner->corr;
|
|
}
|
|
|
|
int rtlsdr_set_tuner_gain(rtlsdr_dev_t *dev, int gain)
|
|
{
|
|
int r;
|
|
|
|
if (!dev || !dev->tuner)
|
|
return -1;
|
|
|
|
r = dev->tuner->set_gain((void *)dev, gain);
|
|
|
|
if (!r)
|
|
dev->tuner->gain = gain;
|
|
|
|
return r;
|
|
}
|
|
|
|
int rtlsdr_get_tuner_gain(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev || !dev->tuner)
|
|
return -1;
|
|
|
|
return dev->tuner->gain;
|
|
}
|
|
|
|
int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
|
|
{
|
|
uint16_t tmp;
|
|
uint32_t rsamp_ratio;
|
|
double real_rate;
|
|
|
|
if (!dev)
|
|
return -1;
|
|
|
|
/* check for the maximum rate the resampler supports */
|
|
if (samp_rate > MAX_SAMP_RATE)
|
|
samp_rate = MAX_SAMP_RATE;
|
|
|
|
rsamp_ratio = (CRYSTAL_FREQ * pow(2, 22)) / samp_rate;
|
|
rsamp_ratio &= ~3;
|
|
|
|
real_rate = (CRYSTAL_FREQ * pow(2, 22)) / rsamp_ratio;
|
|
fprintf(stderr, "Setting sample rate: %.3f Hz\n", real_rate);
|
|
|
|
if (dev->tuner)
|
|
dev->tuner->set_bw((void *)dev, real_rate);
|
|
|
|
dev->rate = samp_rate;
|
|
|
|
tmp = (rsamp_ratio >> 16);
|
|
rtlsdr_demod_write_reg(dev, 1, 0x9f, tmp, 2);
|
|
tmp = rsamp_ratio & 0xffff;
|
|
rtlsdr_demod_write_reg(dev, 1, 0xa1, tmp, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_get_sample_rate(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
return dev->rate;
|
|
}
|
|
|
|
rtlsdr_device_t *find_known_device(uint16_t vid, uint16_t pid)
|
|
{
|
|
int i;
|
|
rtlsdr_device_t *device = NULL;
|
|
|
|
for (i = 0; i < sizeof(devices)/sizeof(rtlsdr_device_t); i++ ) {
|
|
if (devices[i].vid == vid && devices[i].pid == pid) {
|
|
device = &devices[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
return device;
|
|
}
|
|
|
|
uint32_t rtlsdr_get_device_count(void)
|
|
{
|
|
int i;
|
|
libusb_context *ctx;
|
|
libusb_device **list;
|
|
uint32_t device_count = 0;
|
|
struct libusb_device_descriptor dd;
|
|
ssize_t cnt;
|
|
|
|
libusb_init(&ctx);
|
|
|
|
cnt = libusb_get_device_list(ctx, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
if (find_known_device(dd.idVendor, dd.idProduct))
|
|
device_count++;
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
libusb_exit(ctx);
|
|
|
|
return device_count;
|
|
}
|
|
|
|
const char *rtlsdr_get_device_name(uint32_t index)
|
|
{
|
|
int i;
|
|
libusb_context *ctx;
|
|
libusb_device **list;
|
|
struct libusb_device_descriptor dd;
|
|
rtlsdr_device_t *device = NULL;
|
|
uint32_t device_count = 0;
|
|
ssize_t cnt;
|
|
|
|
libusb_init(&ctx);
|
|
|
|
cnt = libusb_get_device_list(ctx, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
device = find_known_device(dd.idVendor, dd.idProduct);
|
|
|
|
if (device) {
|
|
device_count++;
|
|
|
|
if (index == device_count - 1)
|
|
break;
|
|
}
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
libusb_exit(ctx);
|
|
|
|
if (device)
|
|
return device->name;
|
|
else
|
|
return "";
|
|
}
|
|
|
|
int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
|
|
{
|
|
int r;
|
|
int i;
|
|
libusb_device **list;
|
|
rtlsdr_dev_t *dev = NULL;
|
|
libusb_device *device = NULL;
|
|
uint32_t device_count = 0;
|
|
struct libusb_device_descriptor dd;
|
|
uint8_t reg;
|
|
ssize_t cnt;
|
|
|
|
dev = malloc(sizeof(rtlsdr_dev_t));
|
|
memset(dev, 0, sizeof(rtlsdr_dev_t));
|
|
|
|
libusb_init(&dev->ctx);
|
|
|
|
cnt = libusb_get_device_list(dev->ctx, &list);
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
device = list[i];
|
|
|
|
libusb_get_device_descriptor(list[i], &dd);
|
|
|
|
if (find_known_device(dd.idVendor, dd.idProduct)) {
|
|
device_count++;
|
|
}
|
|
|
|
if (index == device_count - 1)
|
|
break;
|
|
|
|
device = NULL;
|
|
}
|
|
|
|
if (!device) {
|
|
r = -1;
|
|
goto err;
|
|
}
|
|
|
|
r = libusb_open(device, &dev->devh);
|
|
if (r < 0) {
|
|
libusb_free_device_list(list, 0);
|
|
fprintf(stderr, "usb_open error %d\n", r);
|
|
goto err;
|
|
}
|
|
|
|
libusb_free_device_list(list, 0);
|
|
|
|
r = libusb_claim_interface(dev->devh, 0);
|
|
if (r < 0) {
|
|
fprintf(stderr, "usb_claim_interface error %d\n", r);
|
|
goto err;
|
|
}
|
|
|
|
rtlsdr_init_baseband(dev);
|
|
|
|
/* Probe tuners */
|
|
rtlsdr_set_i2c_repeater(dev, 1);
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, E4K_I2C_ADDR, E4K_CHECK_ADDR);
|
|
if (reg == E4K_CHECK_VAL) {
|
|
fprintf(stderr, "Found Elonics E4000 tuner\n");
|
|
dev->tuner = &tuners[RTLSDR_TUNER_E4000];
|
|
goto found;
|
|
}
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, FC0013_I2C_ADDR, FC0013_CHECK_ADDR);
|
|
if (reg == FC0013_CHECK_VAL) {
|
|
fprintf(stderr, "Found Fitipower FC0013 tuner\n");
|
|
dev->tuner = &tuners[RTLSDR_TUNER_FC0013];
|
|
goto found;
|
|
}
|
|
|
|
/* initialise GPIOs */
|
|
rtlsdr_set_gpio_output(dev, 5);
|
|
|
|
/* reset tuner before probing */
|
|
rtlsdr_set_gpio_bit(dev, 5, 1);
|
|
rtlsdr_set_gpio_bit(dev, 5, 0);
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, FC2580_I2C_ADDR, FC2580_CHECK_ADDR);
|
|
if ((reg & 0x7f) == FC2580_CHECK_VAL) {
|
|
fprintf(stderr, "Found FCI 2580 tuner\n");
|
|
dev->tuner = &tuners[RTLSDR_TUNER_FC2580];
|
|
goto found;
|
|
}
|
|
|
|
reg = rtlsdr_i2c_read_reg(dev, FC0012_I2C_ADDR, FC0012_CHECK_ADDR);
|
|
if (reg == FC0012_CHECK_VAL) {
|
|
fprintf(stderr, "Found Fitipower FC0012 tuner\n");
|
|
rtlsdr_set_gpio_output(dev, 6);
|
|
dev->tuner = &tuners[RTLSDR_TUNER_FC0012];
|
|
goto found;
|
|
}
|
|
|
|
found:
|
|
if (dev->tuner)
|
|
r =dev->tuner->init(dev);
|
|
|
|
rtlsdr_set_i2c_repeater(dev, 0);
|
|
|
|
*out_dev = dev;
|
|
|
|
return 0;
|
|
err:
|
|
if (dev) {
|
|
if (dev->ctx)
|
|
libusb_exit(dev->ctx);
|
|
|
|
free(dev);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int rtlsdr_close(rtlsdr_dev_t *dev)
|
|
{
|
|
int i;
|
|
|
|
if (!dev)
|
|
return -1;
|
|
|
|
rtlsdr_deinit_baseband(dev);
|
|
|
|
libusb_release_interface(dev->devh, 0);
|
|
libusb_close(dev->devh);
|
|
|
|
for(i = 0; i < BUF_COUNT; ++i) {
|
|
if (dev->xfer[i])
|
|
libusb_free_transfer(dev->xfer[i]);
|
|
if (dev->xfer_buf[i])
|
|
free(dev->xfer_buf[i]);
|
|
}
|
|
|
|
libusb_exit(dev->ctx);
|
|
|
|
free(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_reset_buffer(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
|
|
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x0000, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtlsdr_read_sync(rtlsdr_dev_t *dev, void *buf, int len, int *n_read)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
return libusb_bulk_transfer(dev->devh, 0x81, buf, len, n_read, 3000);
|
|
}
|
|
|
|
static void LIBUSB_CALL _libusb_callback(struct libusb_transfer *transfer)
|
|
{
|
|
if (LIBUSB_TRANSFER_COMPLETED == transfer->status) {
|
|
rtlsdr_dev_t *dev = (rtlsdr_dev_t *)transfer->user_data;
|
|
|
|
dev->cb(transfer->buffer, transfer->actual_length, dev->cb_ctx);
|
|
|
|
libusb_submit_transfer(transfer); /* resubmit transfer */
|
|
} else {
|
|
/*fprintf(stderr, "transfer %d\n", transfer->status);*/
|
|
}
|
|
}
|
|
|
|
int rtlsdr_wait_async(rtlsdr_dev_t *dev, rtlsdr_async_read_cb_t cb, void *ctx)
|
|
{
|
|
int i, r;
|
|
|
|
if (!dev)
|
|
return -1;
|
|
|
|
dev->cb = cb;
|
|
dev->cb_ctx = ctx;
|
|
|
|
for(i = 0; i < BUF_COUNT; ++i) {
|
|
if (dev->xfer[i])
|
|
continue;
|
|
|
|
dev->xfer[i] = libusb_alloc_transfer(0);
|
|
}
|
|
|
|
for(i = 0; i < BUF_COUNT; ++i) {
|
|
if (dev->xfer_buf[i])
|
|
continue;
|
|
|
|
dev->xfer_buf[i] = (unsigned char *)malloc(BUF_LENGTH);
|
|
}
|
|
|
|
for(i = 0; i < BUF_COUNT; ++i) {
|
|
libusb_fill_bulk_transfer(dev->xfer[i],
|
|
dev->devh,
|
|
0x81,
|
|
dev->xfer_buf[i], BUF_LENGTH,
|
|
_libusb_callback,
|
|
(void *)dev, 0);
|
|
|
|
libusb_submit_transfer(dev->xfer[i]);
|
|
}
|
|
|
|
dev->run_async = 1;
|
|
|
|
while (dev->run_async) {
|
|
struct timeval tv = { 1, 0 };
|
|
r = libusb_handle_events_timeout(dev->ctx, &tv);
|
|
if (r < 0) {
|
|
/*fprintf(stderr, "handle_events %d\n", r);*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int rtlsdr_cancel_async(rtlsdr_dev_t *dev)
|
|
{
|
|
if (!dev)
|
|
return -1;
|
|
|
|
if (dev->run_async) {
|
|
dev->run_async = 0;
|
|
return 0;
|
|
}
|
|
|
|
return -2;
|
|
}
|