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hackrf/firmware/hackrf_usb/usb_api_transceiver.c
Martin Ling 838ad0726c Flush bulk endpoints from USB ISR on mode change request. 
The previous change moved this flush from the vendor request handler to
the transceiver_shutdown() function which runs outside ISR context.

However, without this flush in the ISR, the firmware can sometimes end up
stuck in TX or RX mode after a request to go IDLE. It's still not clear
how this happens, but keeping the flush in the USB ISR fixes it, and as
soon as a mode change is requested we know we are going to be flushing
anyway, so there is no harm to do so here.

This commit does not remove the flush in transceiver_shutdown(), because
it is possible that the ISR will return just before the transceiver loop
queues a new transfer. Rather than try to avoid that race, we can just
flush again later.
2022-02-13 16:11:31 +00:00

418 lines
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/*
* Copyright 2012 Jared Boone
* Copyright 2013 Benjamin Vernoux
*
* This file is part of HackRF.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "usb_api_transceiver.h"
#include "hackrf_ui.h"
#include "operacake_sctimer.h"
#include <libopencm3/cm3/vector.h>
#include "usb_bulk_buffer.h"
#include "m0_state.h"
#include "usb_api_cpld.h" // Remove when CPLD update is handled elsewhere
#include <max2837.h>
#include <rf_path.h>
#include <tuning.h>
#include <streaming.h>
#include <usb.h>
#include <usb_queue.h>
#include <stddef.h>
#include <string.h>
#include "usb_endpoint.h"
#include "usb_api_sweep.h"
typedef struct {
uint32_t freq_mhz;
uint32_t freq_hz;
} set_freq_params_t;
set_freq_params_t set_freq_params;
struct set_freq_explicit_params {
uint64_t if_freq_hz; /* intermediate frequency */
uint64_t lo_freq_hz; /* front-end local oscillator frequency */
uint8_t path; /* image rejection filter path */
};
struct set_freq_explicit_params explicit_params;
typedef struct {
uint32_t freq_hz;
uint32_t divider;
} set_sample_r_params_t;
set_sample_r_params_t set_sample_r_params;
usb_request_status_t usb_vendor_request_set_baseband_filter_bandwidth(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage
) {
if( stage == USB_TRANSFER_STAGE_SETUP ) {
const uint32_t bandwidth = (endpoint->setup.index << 16) | endpoint->setup.value;
if( baseband_filter_bandwidth_set(bandwidth) ) {
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_STALL;
} else {
return USB_REQUEST_STATUS_OK;
}
}
usb_request_status_t usb_vendor_request_set_freq(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage)
{
if (stage == USB_TRANSFER_STAGE_SETUP)
{
usb_transfer_schedule_block(endpoint->out, &set_freq_params, sizeof(set_freq_params_t),
NULL, NULL);
return USB_REQUEST_STATUS_OK;
} else if (stage == USB_TRANSFER_STAGE_DATA)
{
const uint64_t freq = set_freq_params.freq_mhz * 1000000ULL + set_freq_params.freq_hz;
if( set_freq(freq) )
{
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_STALL;
} else
{
return USB_REQUEST_STATUS_OK;
}
}
usb_request_status_t usb_vendor_request_set_sample_rate_frac(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage)
{
if (stage == USB_TRANSFER_STAGE_SETUP)
{
usb_transfer_schedule_block(endpoint->out, &set_sample_r_params, sizeof(set_sample_r_params_t),
NULL, NULL);
return USB_REQUEST_STATUS_OK;
} else if (stage == USB_TRANSFER_STAGE_DATA)
{
if( sample_rate_frac_set(set_sample_r_params.freq_hz * 2, set_sample_r_params.divider ) )
{
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_STALL;
} else
{
return USB_REQUEST_STATUS_OK;
}
}
usb_request_status_t usb_vendor_request_set_amp_enable(
usb_endpoint_t* const endpoint, const usb_transfer_stage_t stage)
{
if (stage == USB_TRANSFER_STAGE_SETUP) {
switch (endpoint->setup.value) {
case 0:
rf_path_set_lna(&rf_path, 0);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
case 1:
rf_path_set_lna(&rf_path, 1);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
default:
return USB_REQUEST_STATUS_STALL;
}
} else {
return USB_REQUEST_STATUS_OK;
}
}
usb_request_status_t usb_vendor_request_set_lna_gain(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage)
{
if( stage == USB_TRANSFER_STAGE_SETUP ) {
const uint8_t value = max2837_set_lna_gain(&max2837, endpoint->setup.index);
endpoint->buffer[0] = value;
if(value) hackrf_ui()->set_bb_lna_gain(endpoint->setup.index);
usb_transfer_schedule_block(endpoint->in, &endpoint->buffer, 1,
NULL, NULL);
usb_transfer_schedule_ack(endpoint->out);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_OK;
}
usb_request_status_t usb_vendor_request_set_vga_gain(
usb_endpoint_t* const endpoint, const usb_transfer_stage_t stage)
{
if( stage == USB_TRANSFER_STAGE_SETUP ) {
const uint8_t value = max2837_set_vga_gain(&max2837, endpoint->setup.index);
endpoint->buffer[0] = value;
if(value) hackrf_ui()->set_bb_vga_gain(endpoint->setup.index);
usb_transfer_schedule_block(endpoint->in, &endpoint->buffer, 1,
NULL, NULL);
usb_transfer_schedule_ack(endpoint->out);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_OK;
}
usb_request_status_t usb_vendor_request_set_txvga_gain(
usb_endpoint_t* const endpoint, const usb_transfer_stage_t stage)
{
if( stage == USB_TRANSFER_STAGE_SETUP ) {
const uint8_t value = max2837_set_txvga_gain(&max2837, endpoint->setup.index);
endpoint->buffer[0] = value;
if(value) hackrf_ui()->set_bb_tx_vga_gain(endpoint->setup.index);
usb_transfer_schedule_block(endpoint->in, &endpoint->buffer, 1,
NULL, NULL);
usb_transfer_schedule_ack(endpoint->out);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_OK;
}
usb_request_status_t usb_vendor_request_set_antenna_enable(
usb_endpoint_t* const endpoint, const usb_transfer_stage_t stage)
{
if (stage == USB_TRANSFER_STAGE_SETUP) {
switch (endpoint->setup.value) {
case 0:
rf_path_set_antenna(&rf_path, 0);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
case 1:
rf_path_set_antenna(&rf_path, 1);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
default:
return USB_REQUEST_STATUS_STALL;
}
} else {
return USB_REQUEST_STATUS_OK;
}
}
usb_request_status_t usb_vendor_request_set_freq_explicit(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage)
{
if (stage == USB_TRANSFER_STAGE_SETUP) {
usb_transfer_schedule_block(endpoint->out, &explicit_params,
sizeof(struct set_freq_explicit_params), NULL, NULL);
return USB_REQUEST_STATUS_OK;
} else if (stage == USB_TRANSFER_STAGE_DATA) {
if (set_freq_explicit(explicit_params.if_freq_hz,
explicit_params.lo_freq_hz, explicit_params.path)) {
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
}
return USB_REQUEST_STATUS_STALL;
} else {
return USB_REQUEST_STATUS_OK;
}
}
static volatile hw_sync_mode_t _hw_sync_mode = HW_SYNC_MODE_OFF;
void set_hw_sync_mode(const hw_sync_mode_t new_hw_sync_mode) {
_hw_sync_mode = new_hw_sync_mode;
}
volatile transceiver_request_t transceiver_request = {
.mode = TRANSCEIVER_MODE_OFF,
.seq = 0,
};
// Must be called from an atomic context (normally USB ISR)
void request_transceiver_mode(transceiver_mode_t mode)
{
usb_endpoint_flush(&usb_endpoint_bulk_in);
usb_endpoint_flush(&usb_endpoint_bulk_out);
transceiver_request.mode = mode;
transceiver_request.seq++;
}
void transceiver_shutdown(void)
{
baseband_streaming_disable(&sgpio_config);
operacake_sctimer_reset_state();
usb_endpoint_flush(&usb_endpoint_bulk_in);
usb_endpoint_flush(&usb_endpoint_bulk_out);
led_off(LED2);
led_off(LED3);
rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_OFF);
m0_state.tx = false;
}
void transceiver_startup(const transceiver_mode_t mode) {
hackrf_ui()->set_transceiver_mode(mode);
switch (mode) {
case TRANSCEIVER_MODE_RX_SWEEP:
case TRANSCEIVER_MODE_RX:
led_off(LED3);
led_on(LED2);
rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_RX);
m0_state.tx = false;
break;
case TRANSCEIVER_MODE_TX:
led_off(LED2);
led_on(LED3);
rf_path_set_direction(&rf_path, RF_PATH_DIRECTION_TX);
m0_state.tx = true;
break;
default:
break;
}
activate_best_clock_source();
hw_sync_enable(_hw_sync_mode);
m0_state.offset = 0;
}
usb_request_status_t usb_vendor_request_set_transceiver_mode(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage)
{
if( stage == USB_TRANSFER_STAGE_SETUP ) {
switch( endpoint->setup.value ) {
case TRANSCEIVER_MODE_OFF:
case TRANSCEIVER_MODE_RX:
case TRANSCEIVER_MODE_TX:
case TRANSCEIVER_MODE_RX_SWEEP:
case TRANSCEIVER_MODE_CPLD_UPDATE:
request_transceiver_mode(endpoint->setup.value);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
default:
return USB_REQUEST_STATUS_STALL;
}
} else {
return USB_REQUEST_STATUS_OK;
}
}
usb_request_status_t usb_vendor_request_set_hw_sync_mode(
usb_endpoint_t* const endpoint,
const usb_transfer_stage_t stage)
{
if( stage == USB_TRANSFER_STAGE_SETUP ) {
set_hw_sync_mode(endpoint->setup.value);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
} else {
return USB_REQUEST_STATUS_OK;
}
}
void rx_mode(uint32_t seq) {
unsigned int phase = 1;
transceiver_startup(TRANSCEIVER_MODE_RX);
baseband_streaming_enable(&sgpio_config);
while (transceiver_request.seq == seq) {
// Set up IN transfer of buffer 0.
if (16384 <= m0_state.offset && 1 == phase) {
usb_transfer_schedule_block(
&usb_endpoint_bulk_in,
&usb_bulk_buffer[0x0000],
0x4000,
NULL, NULL
);
phase = 0;
}
// Set up IN transfer of buffer 1.
if (16384 > m0_state.offset && 0 == phase) {
usb_transfer_schedule_block(
&usb_endpoint_bulk_in,
&usb_bulk_buffer[0x4000],
0x4000,
NULL, NULL
);
phase = 1;
}
}
transceiver_shutdown();
}
void tx_mode(uint32_t seq) {
unsigned int phase = 1;
transceiver_startup(TRANSCEIVER_MODE_TX);
memset(&usb_bulk_buffer[0x0000], 0, 0x8000);
// Set up OUT transfer of buffer 1.
usb_transfer_schedule_block(
&usb_endpoint_bulk_out,
&usb_bulk_buffer[0x4000],
0x4000,
NULL, NULL
);
// Start transmitting zeros while the host fills buffer 1.
baseband_streaming_enable(&sgpio_config);
while (transceiver_request.seq == seq) {
// Set up OUT transfer of buffer 0.
if (16384 <= m0_state.offset && 1 == phase) {
usb_transfer_schedule_block(
&usb_endpoint_bulk_out,
&usb_bulk_buffer[0x0000],
0x4000,
NULL, NULL
);
phase = 0;
}
// Set up OUT transfer of buffer 1.
if (16384 > m0_state.offset && 0 == phase) {
usb_transfer_schedule_block(
&usb_endpoint_bulk_out,
&usb_bulk_buffer[0x4000],
0x4000,
NULL, NULL
);
phase = 1;
}
}
transceiver_shutdown();
}
void off_mode(uint32_t seq)
{
hackrf_ui()->set_transceiver_mode(TRANSCEIVER_MODE_OFF);
while (transceiver_request.seq == seq);
}
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