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/*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Extra thanks to Ryan Woodings @ Metageek for interface documentation
*/
#include "config.h"
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <signal.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <pthread.h>
#include <string.h>
#include <math.h>
#ifdef HAVE_VALUES_H
#include <values.h>
#endif
#ifdef SYS_LINUX
/* Needed for our own tools */
#include <unistd.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
/* Kluge around kernel internal/external header breakage */
#ifndef __user
#define __user
#endif
#include <linux/usbdevice_fs.h>
#include <errno.h>
/*
* Miserable hack to fix some distros which bundle a modern kernel but didn't
* update their linux/usbdevice_fs.h files. We define the ioctl locally, in
* theory the worst that could happen is that the kernel rejects it anyhow.
*/
#ifndef USBDEVFS_DISCONNECT
#warning "Kernel headers dont define USB disconnect support, trying to fake it"
#define USBDEVFS_DISCONNECT _IO('U', 22)
#endif
#endif /* linux hack */
/* LibUSB stuff */
#include <usb.h>
/* USB HID functions from specs which aren't defined for us */
#define HID_GET_REPORT 0x01
#define HID_SET_REPORT 0x09
#define TIMEOUT 9000
#define METAGEEK_WISPY24x_VID 0x1781
#define METAGEEK_WISPY24x_PID 0x083f
/* Default # of samples */
#define WISPY24x_USB_NUM_SAMPLES 256
/* Set data feature defaults */
#define WISPY24x_USB_DEF_CARRIER 0x58e2f8
#define WISPY24x_USB_DEF_STEP_MANT 0x8e
#define WISPY24x_USB_DEF_STEP_EXP 0x03
#define WISPY24x_USB_DEF_BW 0x05
#define WISPY24x_USB_DEF_BW_AVG 0x01
#define WISPY24x_USB_DEF_STEPS 255
#define WISPY24x_USB_DEF_READS 6
#define WISPY24x_USB_DEF_H_MINKHZ 2399938
#define WISPY24x_USB_DEF_H_RESHZ 327942
#define WISPY24x_USB_CARRIER_C_FROM_KHZ(K) (int) ceil((float) (K) / \
((27.0f / pow(2, 16)) * 1000))
#define WISPY24x_USB_CARRIER_KHZ_FROM_C(C) (int) ((27.0f / pow(2, 16)) * 1000 * (C))
/* Calculate the spacing mantissa from khz */
#define WISPY24x_USB_RES_M_FROM_HZ(H,E) (int) (((H) / ((27.0f / pow(2, 18)) * \
pow(2, (E)) * 1000000)) - 256.0)
#define WISPY24x_USB_RES_HZ_FROM_ME(M,E) (int) ((27.0f / pow(2, 18)) * (256 + (M)) * \
pow(2, (E)) * 1000000)
/* Calculate the bandwidth - Typically we want 3:1 bandwidth:sampleres */
#define WISPY24x_USB_BW_HZ_FROM_ME(M,E) (int) (27.0f / (8 * (4 + (M)) * \
pow(2, (E))) * 1000000)
#define WISPY24x_USB_BW_M_FROM_HZ(H,E) (int) ((27.0f * 1000000 / ((H) * \
8 * pow(2, (E)))) - 4)
#define WISPY24x_USB_BW_EXTRACT_M(D) (int) (((D) & 0xC) >> 2)
#define WISPY24x_USB_BW_EXTRACT_E(D) (int) (((D) & 0x3))
#define WISPY24x_USB_BW_BUILD(M,E) (int) ((((M) << 2) | ((E))) & 0xF)
#define WISPY24x_USB_OFFSET_MDBM -134000
#define WISPY24x_USB_RES_MDBM 500
#define WISPY24x_USB_RSSI_MAX 222
/*
#define WISPY24x_USB_MIN_SAMPLE -125
#define WISPY24x_USB_MIN_SIGNAL -119
#define WISPY24x_USB_MAX_SAMPLE -23
#define WISPY24x_USB_RSSI(x) (((float) (x) * 0.5) - 134.0)
*/
#include "spectool_container.h"
#include "wispy_hw_24x.h"
#define endian_swap32(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0x000000ff) << 24) | \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0x0000ff00) << 8) | \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0x00ff0000) >> 8) | \
(uint32_t)(((uint32_t)(__x) & (uint32_t)0xff000000) >> 24) )); \
})
/* Aux tracking struct for wispy1 characteristics */
typedef struct _wispy24x_usb_aux {
struct usb_device *dev;
struct usb_dev_handle *devhdl;
time_t last_read;
/* have we pushed a configure event from sweeps */
int configured;
/* IPC tracking records to the forked process for capturing data */
pthread_t usb_thread;
int usb_thread_alive;
/* Has the sweep data buffer been initialized? (ie, did we get a sample at 0) */
int sweepbuf_initialized;
/* how many sweeps has this device done over the run time? Nice to know, and
* we can use it for calibration counters too */
int num_sweeps;
/* Sweep buffer we maintain and return */
spectool_sample_sweep *sweepbuf;
int sockpair[2];
int sweepbase;
spectool_phy *phydev;
} wispy24x_usb_aux;
typedef struct _wispy24x_rfsettings {
uint8_t feature_id;
uint32_t freq_carrier : 24;
uint8_t step_mantissa;
uint8_t step_exponent;
uint8_t bandwidth;
uint8_t bw_average;
uint8_t num_steps;
uint8_t num_reads;
uint32_t freq_min_khz;
uint32_t freq_res_hz : 24;
} __attribute__((packed)) wispy24x_rfsettings;
typedef struct _wispy24x_report {
uint8_t report_id;
uint32_t freq_start_khz;
uint32_t freq_res_hz : 24;
uint8_t valid_bytes;
uint8_t data[54];
} __attribute__((packed)) wispy24x_report;
#ifdef SYS_LINUX
/* Libusb doesn't seem to always provide this, so we'll use our own, taken from the
* usb_detach_kernel_driver_np...
*
* THIS IS A HORRIBLE EVIL HACK THAT SHOULDN'T BE DONE, EVER
*
*/
struct local_usb_ioctl {
int ifno;
int ioctl_code;
void *data;
};
struct ghetto_libusb_devhandle {
int fd;
/* Nooo... so bad. */
};
int wispy24x_usb_detach_hack(struct usb_dev_handle *dev, int interface, char *errstr) {
struct local_usb_ioctl command;
struct ghetto_libusb_devhandle *gdev;
command.ifno = interface;
command.ioctl_code = USBDEVFS_DISCONNECT;
command.data = NULL;
gdev = (struct ghetto_libusb_devhandle *) dev;
if (ioctl(gdev->fd, USBDEVFS_IOCTL, &command) < 0) {
if (errno == EINVAL) {
snprintf(errstr, SPECTOOL_ERROR_MAX, "Your kernel doesn't appear to accept "
"the USB disconnect command. Either your kernel is too old and "
"does not support device removal, or support for removal has "
"been changed by your distribution kernel maintainers.");
}
snprintf(errstr, SPECTOOL_ERROR_MAX, "Could not detach kernel driver from "
"interface %d: %s", interface, strerror(errno));
return -1;
}
return 0;
}
#endif /* sys_linux */
/* Prototypes */
int wispy24x_usb_open(spectool_phy *);
int wispy24x_usb_close(spectool_phy *);
int wispy24x_usb_thread_close(spectool_phy *);
int wispy24x_usb_poll(spectool_phy *);
int wispy24x_usb_getpollfd(spectool_phy *);
void wispy24x_usb_setcalibration(spectool_phy *, int);
int wispy24x_usb_setposition(spectool_phy *, int, int, int);
spectool_sample_sweep *wispy24x_usb_getsweep(spectool_phy *);
uint32_t wispy24x_adler_checksum(const char *buf1, int len) {
int i;
uint32_t s1, s2;
char *buf = (char *)buf1;
int CHAR_OFFSET = 0;
s1 = s2 = 0;
for (i = 0; i < (len-4); i+=4) {
s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3] +
10*CHAR_OFFSET;
s1 += (buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3] + 4*CHAR_OFFSET);
}
for (; i < len; i++) {
s1 += (buf[i]+CHAR_OFFSET); s2 += s1;
}
return (s1 & 0xffff) + (s2 << 16);
}
/* Scan for devices */
int wispy24x_usb_device_scan(spectool_device_list *list) {
struct usb_bus *bus;
struct usb_device *dev;
int num_found = 0;
wispy24x_usb_pair *auxpair;
char combopath[128];
/* Libusb init */
usb_init();
usb_find_busses();
usb_find_devices();
for (bus = usb_busses; bus; bus = bus->next) {
for (dev = bus->devices; dev; dev = dev->next) {
if (((dev->descriptor.idVendor == METAGEEK_WISPY24x_VID) &&
(dev->descriptor.idProduct == METAGEEK_WISPY24x_PID))) {
/* If we're full up, break */
if (list->num_devs == list->max_devs - 1)
break;
auxpair = (wispy24x_usb_pair *) malloc(sizeof(wispy24x_usb_pair));
snprintf(auxpair->bus, 64, "%s", bus->dirname);
snprintf(auxpair->dev, 64, "%s", dev->filename);
snprintf(combopath, 128, "%s%s", auxpair->bus, auxpair->dev);
/* Fill in the list elements */
list->list[list->num_devs].device_id =
wispy24x_adler_checksum(combopath, 128);
snprintf(list->list[list->num_devs].name, SPECTOOL_PHY_NAME_MAX,
"Wi-Spy 24x USB %u", list->list[list->num_devs].device_id);
list->list[list->num_devs].init_func = wispy24x_usb_init;
list->list[list->num_devs].hw_rec = auxpair;
list->list[list->num_devs].num_sweep_ranges = 1;
list->list[list->num_devs].supported_ranges =
(spectool_sample_sweep *) malloc(sizeof(spectool_sample_sweep));
list->list[list->num_devs].supported_ranges[0].name =
strdup("2.4GHz ISM");
list->list[list->num_devs].supported_ranges[0].num_samples =
WISPY24x_USB_NUM_SAMPLES;
list->list[list->num_devs].supported_ranges[0].amp_offset_mdbm =
WISPY24x_USB_OFFSET_MDBM;
list->list[list->num_devs].supported_ranges[0].amp_res_mdbm =
WISPY24x_USB_RES_MDBM;
list->list[list->num_devs].supported_ranges[0].rssi_max =
WISPY24x_USB_RSSI_MAX;
list->list[list->num_devs].supported_ranges[0].start_khz =
WISPY24x_USB_DEF_H_MINKHZ;
list->list[list->num_devs].supported_ranges[0].end_khz =
WISPY24x_USB_DEF_H_MINKHZ + ((WISPY24x_USB_DEF_STEPS *
WISPY24x_USB_DEF_H_RESHZ) / 1000);
list->list[list->num_devs].supported_ranges[0].res_hz =
WISPY24x_USB_DEF_H_RESHZ;
list->num_devs++;
num_found++;
}
}
}
return num_found;
}
int wispy24x_usb_init(spectool_phy *phydev, spectool_device_rec *rec) {
wispy24x_usb_pair *auxpair = (wispy24x_usb_pair *) rec->hw_rec;
if (auxpair == NULL)
return -1;
return wispy24x_usb_init_path(phydev, auxpair->bus, auxpair->dev);
}
/* Initialize a specific USB device based on bus and device IDs passed by the UI */
int wispy24x_usb_init_path(spectool_phy *phydev, char *buspath, char *devpath) {
struct usb_bus *bus = NULL;
struct usb_device *dev = NULL;
struct usb_device *usb_dev_chosen = NULL;
char combopath[128];
uint32_t cid;
wispy24x_usb_aux *auxptr = NULL;
usb_init();
usb_find_busses();
usb_find_devices();
snprintf(combopath, 128, "%s%s", buspath, devpath);
cid = wispy24x_adler_checksum(combopath, 128);
/* Don't know if a smarter way offhand, and we don't do this often, so just
* crawl and compare */
for (bus = usb_busses; bus; bus = bus->next) {
if (strcmp(bus->dirname, buspath))
continue;
for (dev = bus->devices; dev; dev = dev->next) {
if (strcmp(dev->filename, devpath))
continue;
if (((dev->descriptor.idVendor == METAGEEK_WISPY24x_VID) &&
(dev->descriptor.idProduct == METAGEEK_WISPY24x_PID))) {
usb_dev_chosen = dev;
break;
} else {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"WISPY24x_INIT failed, specified device %u does not "
"appear to be a Wi-Spy device", cid);
return -1;
}
}
}
if (usb_dev_chosen == NULL) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"WISPY24x_INIT failed, specified device %u does not appear "
"to exist.", cid);
return -1;
}
/* Build the device record with one sweep capability */
phydev->device_spec = (spectool_dev_spec *) malloc(sizeof(spectool_dev_spec));
phydev->device_spec->device_id = cid;
/* Default the name to the buspath */
snprintf(phydev->device_spec->device_name, SPECTOOL_PHY_NAME_MAX,
"Wi-Spy 24x USB %u", cid);
/* State */
phydev->state = SPECTOOL_STATE_CLOSED;
phydev->min_rssi_seen = -1;
phydev->device_spec->device_version = 0x02;
phydev->device_spec->device_flags = SPECTOOL_DEV_FL_VAR_SWEEP;
phydev->device_spec->num_sweep_ranges = 1;
phydev->device_spec->supported_ranges =
(spectool_sample_sweep *) malloc(sizeof(spectool_sample_sweep));
phydev->device_spec->default_range = phydev->device_spec->supported_ranges;
phydev->device_spec->default_range->name = strdup("2.4GHz Normal");
phydev->device_spec->default_range->num_samples = WISPY24x_USB_NUM_SAMPLES;
phydev->device_spec->default_range->amp_offset_mdbm = WISPY24x_USB_OFFSET_MDBM;
phydev->device_spec->default_range->amp_res_mdbm = WISPY24x_USB_RES_MDBM;
phydev->device_spec->default_range->rssi_max = WISPY24x_USB_RSSI_MAX;
phydev->device_spec->default_range->start_khz = WISPY24x_USB_DEF_H_MINKHZ;
phydev->device_spec->default_range->end_khz =
WISPY24x_USB_DEF_H_MINKHZ + ((WISPY24x_USB_DEF_STEPS *
WISPY24x_USB_DEF_H_RESHZ) / 1000);
phydev->device_spec->default_range->res_hz = WISPY24x_USB_DEF_H_RESHZ;
phydev->device_spec->cur_profile = 0;
/* Set up the aux state */
auxptr = malloc(sizeof(wispy24x_usb_aux));
phydev->auxptr = auxptr;
auxptr->configured = 0;
auxptr->dev = dev;
auxptr->devhdl = NULL;
auxptr->phydev = phydev;
auxptr->sockpair[0] = -1;
auxptr->sockpair[1] = -1;
/* Will be filled in by setposition later */
auxptr->sweepbuf_initialized = 0;
auxptr->sweepbuf = NULL;
phydev->open_func = &wispy24x_usb_open;
phydev->close_func = &wispy24x_usb_close;
phydev->poll_func = &wispy24x_usb_poll;
phydev->pollfd_func = &wispy24x_usb_getpollfd;
phydev->setcalib_func = &wispy24x_usb_setcalibration;
phydev->getsweep_func = &wispy24x_usb_getsweep;
phydev->setposition_func = &wispy24x_usb_setposition;
phydev->draw_agg_suggestion = 1;
return 0;
}
void *wispy24x_usb_servicethread(void *aux) {
wispy24x_usb_aux *auxptr = (wispy24x_usb_aux *) aux;
int sock;
struct usb_device *dev;
struct usb_dev_handle *wispy;
char buf[64];
int x = 0, error = 0;
fd_set wset;
struct timeval tm;
sigset_t signal_set;
error = 0;
sock = auxptr->sockpair[1];
dev = auxptr->dev;
wispy = auxptr->devhdl;
/* We don't want to see any signals in the child thread */
sigfillset(&signal_set);
pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
while (1) {
/* wait until we're able to write out to the IPC socket, go into a blocking
* select */
FD_ZERO(&wset);
FD_SET(sock, &wset);
if (select(sock + 1, NULL, &wset, NULL, NULL) < 0) {
snprintf(auxptr->phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb poller failed on IPC write select(): %s",
strerror(errno));
auxptr->usb_thread_alive = 0;
auxptr->phydev->state = SPECTOOL_STATE_ERROR;
pthread_exit(NULL);
}
if (auxptr->usb_thread_alive == 0) {
auxptr->phydev->state = SPECTOOL_STATE_ERROR;
pthread_exit(NULL);
}
if (FD_ISSET(sock, &wset) == 0)
continue;
/* Get new data only if we haven't requeued */
if (error == 0) {
memset(buf, 0, 64);
if (usb_interrupt_read(wispy, 0x81, buf, 64, TIMEOUT) <= 0) {
if (errno == EAGAIN)
continue;
snprintf(auxptr->phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb poller failed to read USB data: %s",
strerror(errno));
auxptr->usb_thread_alive = 0;
auxptr->phydev->state = SPECTOOL_STATE_ERROR;
pthread_exit(NULL);
}
/* Send it to the IPC remote, re-queue on enobufs */
if (send(sock, buf, 64, 0) < 0) {
if (errno == ENOBUFS) {
error = 1;
continue;
}
snprintf(auxptr->phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb poller failed on IPC send: %s",
strerror(errno));
auxptr->usb_thread_alive = 0;
auxptr->phydev->state = SPECTOOL_STATE_ERROR;
pthread_exit(NULL);
}
}
error = 0;
}
auxptr->usb_thread_alive = 0;
send(sock, buf, 64, 0);
auxptr->phydev->state = SPECTOOL_STATE_ERROR;
pthread_exit(NULL);
}
int wispy24x_usb_getpollfd(spectool_phy *phydev) {
wispy24x_usb_aux *auxptr = (wispy24x_usb_aux *) phydev->auxptr;
if (auxptr->usb_thread_alive == 0) {
wispy24x_usb_close(phydev);
return -1;
}
return auxptr->sockpair[0];
}
int wispy24x_usb_open(spectool_phy *phydev) {
int pid_status;
wispy24x_usb_aux *auxptr = (wispy24x_usb_aux *) phydev->auxptr;
/* Make the client/server socketpair */
if (socketpair(PF_UNIX, SOCK_DGRAM, 0, auxptr->sockpair) < 0) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb open failed to create socket pair for capture "
"process: %s", strerror(errno));
return -1;
}
if ((auxptr->devhdl = usb_open(auxptr->dev)) == NULL) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb capture process failed to open USB device: %s",
strerror(errno));
return -1;
}
#ifdef LIBUSB_HAS_DETACH_KERNEL_DRIVER_NP
// fprintf(stderr, "debug - detach kernel driver np\n");
if (usb_detach_kernel_driver_np(auxptr->devhdl, 0)) {
// fprintf(stderr, "Could not detach kernel driver %s\n", usb_strerror());
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"Could not detach device from kernel driver: %s",
usb_strerror());
}
#endif
// fprintf(stderr, "debug - set_configuration\n");
usb_set_configuration(auxptr->devhdl, 1);
// fprintf(stderr, "debug - claiming interface\n");
if (usb_claim_interface(auxptr->devhdl, 0) < 0) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"could not claim interface: %s", usb_strerror());
}
auxptr->usb_thread_alive = 1;
auxptr->last_read = time(0);
if (pthread_create(&(auxptr->usb_thread), NULL,
wispy24x_usb_servicethread, auxptr) < 0) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb capture failed to create thread: %s",
strerror(errno));
auxptr->usb_thread_alive = 0;
return -1;
}
/* Update the state */
phydev->state = SPECTOOL_STATE_CONFIGURING;
/*
if (wispy24x_usb_setposition(phydev, 0, 0, 0) < 0)
return -1;
*/
return 1;
}
int wispy24x_usb_close(spectool_phy *phydev) {
wispy24x_usb_aux *aux;
if (phydev == NULL)
return 0;
aux = (wispy24x_usb_aux *) phydev->auxptr;
if (aux == NULL)
return 0;
/* If the thread is still alive, don't take away the devices it might
* still be reading, wait for it to error down */
if (aux->usb_thread_alive) {
aux->usb_thread_alive = 0;
pthread_join(aux->usb_thread, NULL);
}
if (aux->devhdl) {
usb_close(aux->devhdl);
aux->devhdl = NULL;
}
if (aux->sockpair[0] >= 0) {
close(aux->sockpair[0]);
aux->sockpair[0] = -1;
}
if (aux->sockpair[1] >= 0) {
close(aux->sockpair[1]);
aux->sockpair[1] = -1;
}
return 1;
}
spectool_sample_sweep *wispy24x_usb_getsweep(spectool_phy *phydev) {
wispy24x_usb_aux *auxptr = (wispy24x_usb_aux *) phydev->auxptr;
return auxptr->sweepbuf;
}
void wispy24x_usb_setcalibration(spectool_phy *phydev, int in_calib) {
phydev->state = SPECTOOL_STATE_RUNNING;
}
int wispy24x_usb_poll(spectool_phy *phydev) {
wispy24x_usb_aux *auxptr = (wispy24x_usb_aux *) phydev->auxptr;
char lbuf[64];
int base, res, ret, x;
wispy24x_report *report;
/* Push a configure event before anything else */
if (auxptr->configured == 0) {
auxptr->configured = 1;
return SPECTOOL_POLL_CONFIGURED;
}
/* Use the error set by the polling thread */
if (auxptr->usb_thread_alive == 0) {
phydev->state = SPECTOOL_STATE_ERROR;
wispy24x_usb_close(phydev);
return SPECTOOL_POLL_ERROR;
}
if ((ret = recv(auxptr->sockpair[0], lbuf, 64, 0)) < 0) {
if (auxptr->usb_thread_alive != 0)
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb IPC receiver failed to read signal data: %s",
strerror(errno));
phydev->state = SPECTOOL_STATE_ERROR;
return SPECTOOL_POLL_ERROR;
}
if (time(0) - auxptr->last_read > 3) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy1_usb didn't see any data for more than 3 seconds, "
"something has gone wrong (was the device removed?)");
phydev->state = SPECTOOL_STATE_ERROR;
return SPECTOOL_POLL_ERROR;
}
if (ret > 0)
auxptr->last_read = time(0);
// If we don't have a sweepbuf we're not configured, barf
if (auxptr->sweepbuf == NULL) {
return SPECTOOL_POLL_NONE;
}
if (ret < sizeof(wispy24x_report)) {
printf("Short report\n");
return SPECTOOL_POLL_NONE;
}
report = (wispy24x_report *) lbuf;
/* Derive the base slot from the khz start of this sample, based on
* our sweep record */
#ifdef WORDS_BIGENDIAN
base = endian_swap32(report->freq_start_khz) - auxptr->sweepbuf->start_khz;
res = endian_swap32(report->freq_res_hz) >> 8;
#else
base = report->freq_start_khz - auxptr->sweepbuf->start_khz;
res = report->freq_res_hz;
#endif
/*
if (base != 0)
base = (base) / ((float) auxptr->sweepbuf->res_hz / 1000);
*/
if (base == 0)
auxptr->sweepbase = 0;
else
base = auxptr->sweepbase;
if (base < 0 || base > auxptr->sweepbuf->num_samples) {
/* Bunk data, throw it out */
return SPECTOOL_POLL_NONE;
}
/* Initialize the sweep buffer when we get to it
* If we haven't gotten around to a 0 state to initialize the buffer, we throw
* out the sample data until we do. */
if (base == 0) {
auxptr->sweepbuf_initialized = 1;
auxptr->num_sweeps++;
/* Init the timestamp for sweep begin */
gettimeofday(&(auxptr->sweepbuf->tm_start), NULL);
} else if (auxptr->sweepbuf_initialized == 0) {
return SPECTOOL_POLL_NONE;
}
for (x = 0; x < report->valid_bytes; x++) {
if (base + x >= auxptr->sweepbuf->num_samples) {
break;
}
/*
auxptr->sweepbuf->sample_data[base + x] =
WISPY24x_USB_RSSI(report->data[x]);
*/
auxptr->sweepbuf->sample_data[base + x] = report->data[x];
if (report->data[x] < phydev->min_rssi_seen)
phydev->min_rssi_seen = report->data[x];
}
auxptr->sweepbase += report->valid_bytes;
/* Flag that a sweep is complete */
if (base + report->valid_bytes == auxptr->sweepbuf->num_samples) {
gettimeofday(&(auxptr->sweepbuf->tm_end), NULL);
auxptr->sweepbuf->min_rssi_seen = phydev->min_rssi_seen;
return SPECTOOL_POLL_SWEEPCOMPLETE;
}
return SPECTOOL_POLL_NONE;
}
int wispy24x_usb_setposition(spectool_phy *phydev, int in_profile,
int start_khz, int res_hz) {
int temp_d, temp_m;
int best_s_m = 0, best_s_e = 0, best_b_m = 0, best_b_e = 0;
int m = 0, e = 0, best_d;
int target_bw;
struct usb_dev_handle *wispy;
wispy24x_rfsettings rfset;
wispy24x_usb_aux *auxptr = (wispy24x_usb_aux *) phydev->auxptr;
/* This is totally broken for anything but the default */
if (in_profile == 0) {
start_khz = WISPY24x_USB_DEF_H_MINKHZ;
res_hz = WISPY24x_USB_DEF_H_RESHZ;
best_s_m = WISPY24x_USB_DEF_STEP_MANT;
best_s_e = WISPY24x_USB_DEF_STEP_EXP;
best_b_m = WISPY24x_USB_BW_EXTRACT_M(WISPY24x_USB_DEF_BW);
best_b_e = WISPY24x_USB_BW_EXTRACT_E(WISPY24x_USB_DEF_BW);
} else {
/* Brute-force search the exponents and use the reverse of the function as the
* fitness test. Pick the resolution which is closest to our requested one. */
best_d = INT_MAX;
for (e = 0; e <= 4; e++) {
temp_m = WISPY24x_USB_RES_M_FROM_HZ(res_hz, e) & 0xFF;
temp_d = abs(res_hz - WISPY24x_USB_RES_HZ_FROM_ME(temp_m, e));
if (temp_d < best_d) {
best_d = temp_d;
best_s_m = temp_m;
best_s_e = e;
}
}
/* Brute force the bandwidth w/ the mantissa and exponent again and look for the
* bandwidth closest to what we want.
* TODO - add bw allocation sliding based on requested resolution, suggested is
* 1:1 for higher ranges of the resolution and 3:1 for lower ranges
*/
if (res_hz < 100000)
target_bw = res_hz * 3;
else if (res_hz < 200000)
target_bw = res_hz * 2;
else
target_bw = res_hz;
best_d = INT_MAX;
for (m = 0; m <= 4; m++) {
for (e = 0; e <= 4; e++) {
temp_d = abs(target_bw - WISPY24x_USB_BW_HZ_FROM_ME(m, e));
if (temp_d < best_d) {
best_d = temp_d;
best_b_m = m;
best_b_e = e;
}
}
}
/* Reset start_khz to the derived/reversed startkhz to account for any rounding
* in the function */
start_khz =
WISPY24x_USB_CARRIER_KHZ_FROM_C(WISPY24x_USB_CARRIER_C_FROM_KHZ(start_khz));
/* reset the res_hz to the derived value */
res_hz = WISPY24x_USB_RES_HZ_FROM_ME(best_s_m, best_s_e);
}
/* Initialize the hw sweep features */
rfset.feature_id = 0x02;
/* Multibytes have to be handled in USB-endian (little) */
#ifdef WORDS_BIGENDIAN
/* 24-bit values get shifted over to align properly */
rfset.freq_carrier = endian_swap32(WISPY24x_USB_CARRIER_C_FROM_KHZ(start_khz)) >> 8;
rfset.freq_min_khz = endian_swap32(start_khz);
rfset.freq_res_hz = endian_swap32(res_hz) >> 8;
#else
rfset.freq_carrier = WISPY24x_USB_CARRIER_C_FROM_KHZ(start_khz);
rfset.freq_min_khz = start_khz;
rfset.freq_res_hz = res_hz;
#endif
rfset.step_mantissa = best_s_m;
rfset.step_exponent = best_s_e;
rfset.bandwidth = WISPY24x_USB_BW_BUILD(best_b_m, best_b_e);
rfset.bw_average = WISPY24x_USB_DEF_BW_AVG;
rfset.num_steps = WISPY24x_USB_DEF_STEPS;
rfset.num_reads = WISPY24x_USB_DEF_READS;
wispy = auxptr->devhdl;
if (usb_control_msg(wispy,
USB_ENDPOINT_OUT + USB_TYPE_CLASS + USB_RECIP_INTERFACE,
HID_SET_REPORT,
0x02 + (0x03 << 8),
0,
(uint8_t *) &rfset, (int) sizeof(wispy24x_rfsettings),
TIMEOUT) == 0) {
snprintf(phydev->errstr, SPECTOOL_ERROR_MAX,
"wispy24x_usb setposition failed to set sweep feature set: %s",
strerror(errno));
phydev->state = SPECTOOL_STATE_ERROR;
return -1;
}
/* If we successfully configured the hardware, update the sweep capabilities and
* the sweep buffer and reset the device */
phydev->device_spec->num_sweep_ranges = 1;
if (phydev->device_spec->supported_ranges)
free(phydev->device_spec->supported_ranges);
phydev->device_spec->supported_ranges =
(spectool_sample_sweep *) malloc(SPECTOOL_SWEEP_SIZE(0));
memset (phydev->device_spec->supported_ranges, 0, SPECTOOL_SWEEP_SIZE(0));
/* Set the universal values */
phydev->device_spec->supported_ranges[0].num_samples = WISPY24x_USB_NUM_SAMPLES;
phydev->device_spec->supported_ranges[0].amp_offset_mdbm = WISPY24x_USB_OFFSET_MDBM;
phydev->device_spec->supported_ranges[0].amp_res_mdbm = WISPY24x_USB_RES_MDBM;
phydev->device_spec->supported_ranges[0].rssi_max = WISPY24x_USB_RSSI_MAX;
/* Set the sweep records based on default or new data */
if (start_khz == 0) {
phydev->device_spec->supported_ranges[0].start_khz = WISPY24x_USB_DEF_H_MINKHZ;
phydev->device_spec->supported_ranges[0].end_khz =
WISPY24x_USB_DEF_H_MINKHZ + ((WISPY24x_USB_NUM_SAMPLES *
WISPY24x_USB_DEF_H_RESHZ) / 1000);
phydev->device_spec->supported_ranges[0].res_hz = WISPY24x_USB_DEF_H_RESHZ;
} else {
phydev->device_spec->supported_ranges[0].start_khz = start_khz;
phydev->device_spec->supported_ranges[0].end_khz =
start_khz + ((WISPY24x_USB_NUM_SAMPLES * res_hz) / 1000);
phydev->device_spec->supported_ranges[0].res_hz = res_hz;
}
/* We're not configured, so we need to push a new configure block out next time
* we sweep */
auxptr->configured = 0;
/* Rebuild the sweep buffer */
if (auxptr->sweepbuf)
free(auxptr->sweepbuf);
auxptr->sweepbuf =
(spectool_sample_sweep *) malloc(SPECTOOL_SWEEP_SIZE(WISPY24x_USB_NUM_SAMPLES));
auxptr->sweepbuf->phydev = phydev;
auxptr->sweepbuf->start_khz =
phydev->device_spec->supported_ranges[0].start_khz;
auxptr->sweepbuf->end_khz =
phydev->device_spec->supported_ranges[0].end_khz;
auxptr->sweepbuf->res_hz =
phydev->device_spec->supported_ranges[0].res_hz;
auxptr->sweepbuf->num_samples =
phydev->device_spec->supported_ranges[0].num_samples;
auxptr->sweepbuf->amp_offset_mdbm =
phydev->device_spec->supported_ranges[0].amp_offset_mdbm;
auxptr->sweepbuf->amp_res_mdbm =
phydev->device_spec->supported_ranges[0].amp_res_mdbm;
auxptr->sweepbuf->rssi_max =
phydev->device_spec->supported_ranges[0].rssi_max;
/*
auxptr->sweepbuf->min_sample =
phydev->device_spec->supported_ranges[0].min_sample;
auxptr->sweepbuf->min_sig_report =
phydev->device_spec->supported_ranges[0].min_sig_report;
auxptr->sweepbuf->max_sample =
phydev->device_spec->supported_ranges[0].max_sample;
*/
auxptr->sweepbuf_initialized = 0;
auxptr->num_sweeps = -1;
}
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