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linux/drivers/media/usb/hackrf/hackrf.c

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/*
* HackRF driver
*
* Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
*
* 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 of the License, 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.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-vmalloc.h>
/* HackRF USB API commands (from HackRF Library) */
enum {
CMD_SET_TRANSCEIVER_MODE = 0x01,
CMD_SAMPLE_RATE_SET = 0x06,
CMD_BASEBAND_FILTER_BANDWIDTH_SET = 0x07,
CMD_BOARD_ID_READ = 0x0e,
CMD_VERSION_STRING_READ = 0x0f,
CMD_SET_FREQ = 0x10,
CMD_SET_LNA_GAIN = 0x13,
CMD_SET_VGA_GAIN = 0x14,
};
/*
* bEndpointAddress 0x81 EP 1 IN
* Transfer Type Bulk
* wMaxPacketSize 0x0200 1x 512 bytes
*/
#define MAX_BULK_BUFS (6)
#define BULK_BUFFER_SIZE (128 * 512)
static const struct v4l2_frequency_band bands_adc[] = {
{
.tuner = 0,
.type = V4L2_TUNER_ADC,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 200000,
.rangehigh = 24000000,
},
};
static const struct v4l2_frequency_band bands_rf[] = {
{
.tuner = 1,
.type = V4L2_TUNER_RF,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 1,
.rangehigh = 4294967294LL, /* max u32, hw goes over 7GHz */
},
};
/* stream formats */
struct hackrf_format {
char *name;
u32 pixelformat;
u32 buffersize;
};
/* format descriptions for capture and preview */
static struct hackrf_format formats[] = {
{
.name = "Complex S8",
.pixelformat = V4L2_SDR_FMT_CS8,
.buffersize = BULK_BUFFER_SIZE,
},
};
static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
/* intermediate buffers with raw data from the USB device */
struct hackrf_frame_buf {
struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
struct list_head list;
};
struct hackrf_dev {
#define POWER_ON (1 << 1)
#define URB_BUF (1 << 2)
#define USB_STATE_URB_BUF (1 << 3)
unsigned long flags;
struct device *dev;
struct usb_device *udev;
struct video_device vdev;
struct v4l2_device v4l2_dev;
/* videobuf2 queue and queued buffers list */
struct vb2_queue vb_queue;
struct list_head queued_bufs;
spinlock_t queued_bufs_lock; /* Protects queued_bufs */
unsigned sequence; /* Buffer sequence counter */
unsigned int vb_full; /* vb is full and packets dropped */
/* Note if taking both locks v4l2_lock must always be locked first! */
struct mutex v4l2_lock; /* Protects everything else */
struct mutex vb_queue_lock; /* Protects vb_queue */
struct urb *urb_list[MAX_BULK_BUFS];
int buf_num;
unsigned long buf_size;
u8 *buf_list[MAX_BULK_BUFS];
dma_addr_t dma_addr[MAX_BULK_BUFS];
int urbs_initialized;
int urbs_submitted;
/* USB control message buffer */
#define BUF_SIZE 24
u8 buf[BUF_SIZE];
/* Current configuration */
unsigned int f_adc;
unsigned int f_rf;
u32 pixelformat;
u32 buffersize;
/* Controls */
struct v4l2_ctrl_handler hdl;
struct v4l2_ctrl *bandwidth_auto;
struct v4l2_ctrl *bandwidth;
struct v4l2_ctrl *lna_gain;
struct v4l2_ctrl *if_gain;
/* Sample rate calc */
unsigned long jiffies_next;
unsigned int sample;
unsigned int sample_measured;
};
#define hackrf_dbg_usb_control_msg(_dev, _r, _t, _v, _i, _b, _l) { \
char *_direction; \
if (_t & USB_DIR_IN) \
_direction = "<<<"; \
else \
_direction = ">>>"; \
dev_dbg(_dev, "%02x %02x %02x %02x %02x %02x %02x %02x %s %*ph\n", \
_t, _r, _v & 0xff, _v >> 8, _i & 0xff, \
_i >> 8, _l & 0xff, _l >> 8, _direction, _l, _b); \
}
/* execute firmware command */
static int hackrf_ctrl_msg(struct hackrf_dev *dev, u8 request, u16 value,
u16 index, u8 *data, u16 size)
{
int ret;
unsigned int pipe;
u8 requesttype;
switch (request) {
case CMD_SET_TRANSCEIVER_MODE:
case CMD_SET_FREQ:
case CMD_SAMPLE_RATE_SET:
case CMD_BASEBAND_FILTER_BANDWIDTH_SET:
pipe = usb_sndctrlpipe(dev->udev, 0);
requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
break;
case CMD_BOARD_ID_READ:
case CMD_VERSION_STRING_READ:
case CMD_SET_LNA_GAIN:
case CMD_SET_VGA_GAIN:
pipe = usb_rcvctrlpipe(dev->udev, 0);
requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
break;
default:
dev_err(dev->dev, "Unknown command %02x\n", request);
ret = -EINVAL;
goto err;
}
/* write request */
if (!(requesttype & USB_DIR_IN))
memcpy(dev->buf, data, size);
ret = usb_control_msg(dev->udev, pipe, request, requesttype, value,
index, dev->buf, size, 1000);
hackrf_dbg_usb_control_msg(dev->dev, request, requesttype, value,
index, dev->buf, size);
if (ret < 0) {
dev_err(dev->dev, "usb_control_msg() failed %d request %02x\n",
ret, request);
goto err;
}
/* read request */
if (requesttype & USB_DIR_IN)
memcpy(data, dev->buf, size);
return 0;
err:
return ret;
}
/* Private functions */
static struct hackrf_frame_buf *hackrf_get_next_fill_buf(struct hackrf_dev *dev)
{
unsigned long flags;
struct hackrf_frame_buf *buf = NULL;
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
if (list_empty(&dev->queued_bufs))
goto leave;
buf = list_entry(dev->queued_bufs.next, struct hackrf_frame_buf, list);
list_del(&buf->list);
leave:
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
return buf;
}
static unsigned int hackrf_convert_stream(struct hackrf_dev *dev,
void *dst, void *src, unsigned int src_len)
{
memcpy(dst, src, src_len);
/* calculate sample rate and output it in 10 seconds intervals */
if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
#define MSECS 10000UL
unsigned int msecs = jiffies_to_msecs(jiffies -
dev->jiffies_next + msecs_to_jiffies(MSECS));
unsigned int samples = dev->sample - dev->sample_measured;
dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
dev->sample_measured = dev->sample;
dev_dbg(dev->dev, "slen=%u samples=%u msecs=%u sample rate=%lu\n",
src_len, samples, msecs,
samples * 1000UL / msecs);
}
/* total number of samples */
dev->sample += src_len / 2;
return src_len;
}
/*
* This gets called for the bulk stream pipe. This is done in interrupt
* time, so it has to be fast, not crash, and not stall. Neat.
*/
static void hackrf_urb_complete(struct urb *urb)
{
struct hackrf_dev *dev = urb->context;
struct hackrf_frame_buf *fbuf;
dev_dbg_ratelimited(dev->dev, "status=%d length=%d/%d errors=%d\n",
urb->status, urb->actual_length,
urb->transfer_buffer_length, urb->error_count);
switch (urb->status) {
case 0: /* success */
case -ETIMEDOUT: /* NAK */
break;
case -ECONNRESET: /* kill */
case -ENOENT:
case -ESHUTDOWN:
return;
default: /* error */
dev_err_ratelimited(dev->dev, "URB failed %d\n", urb->status);
break;
}
if (likely(urb->actual_length > 0)) {
void *ptr;
unsigned int len;
/* get free framebuffer */
fbuf = hackrf_get_next_fill_buf(dev);
if (unlikely(fbuf == NULL)) {
dev->vb_full++;
dev_notice_ratelimited(dev->dev,
"videobuf is full, %d packets dropped\n",
dev->vb_full);
goto skip;
}
/* fill framebuffer */
ptr = vb2_plane_vaddr(&fbuf->vb, 0);
len = hackrf_convert_stream(dev, ptr, urb->transfer_buffer,
urb->actual_length);
vb2_set_plane_payload(&fbuf->vb, 0, len);
v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp);
fbuf->vb.v4l2_buf.sequence = dev->sequence++;
vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
}
skip:
usb_submit_urb(urb, GFP_ATOMIC);
}
static int hackrf_kill_urbs(struct hackrf_dev *dev)
{
int i;
for (i = dev->urbs_submitted - 1; i >= 0; i--) {
dev_dbg(dev->dev, "kill urb=%d\n", i);
/* stop the URB */
usb_kill_urb(dev->urb_list[i]);
}
dev->urbs_submitted = 0;
return 0;
}
static int hackrf_submit_urbs(struct hackrf_dev *dev)
{
int i, ret;
for (i = 0; i < dev->urbs_initialized; i++) {
dev_dbg(dev->dev, "submit urb=%d\n", i);
ret = usb_submit_urb(dev->urb_list[i], GFP_ATOMIC);
if (ret) {
dev_err(dev->dev, "Could not submit URB no. %d - get them all back\n",
i);
hackrf_kill_urbs(dev);
return ret;
}
dev->urbs_submitted++;
}
return 0;
}
static int hackrf_free_stream_bufs(struct hackrf_dev *dev)
{
if (dev->flags & USB_STATE_URB_BUF) {
while (dev->buf_num) {
dev->buf_num--;
dev_dbg(dev->dev, "free buf=%d\n", dev->buf_num);
usb_free_coherent(dev->udev, dev->buf_size,
dev->buf_list[dev->buf_num],
dev->dma_addr[dev->buf_num]);
}
}
dev->flags &= ~USB_STATE_URB_BUF;
return 0;
}
static int hackrf_alloc_stream_bufs(struct hackrf_dev *dev)
{
dev->buf_num = 0;
dev->buf_size = BULK_BUFFER_SIZE;
dev_dbg(dev->dev, "all in all I will use %u bytes for streaming\n",
MAX_BULK_BUFS * BULK_BUFFER_SIZE);
for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
BULK_BUFFER_SIZE, GFP_ATOMIC,
&dev->dma_addr[dev->buf_num]);
if (!dev->buf_list[dev->buf_num]) {
dev_dbg(dev->dev, "alloc buf=%d failed\n",
dev->buf_num);
hackrf_free_stream_bufs(dev);
return -ENOMEM;
}
dev_dbg(dev->dev, "alloc buf=%d %p (dma %llu)\n", dev->buf_num,
dev->buf_list[dev->buf_num],
(long long)dev->dma_addr[dev->buf_num]);
dev->flags |= USB_STATE_URB_BUF;
}
return 0;
}
static int hackrf_free_urbs(struct hackrf_dev *dev)
{
int i;
hackrf_kill_urbs(dev);
for (i = dev->urbs_initialized - 1; i >= 0; i--) {
if (dev->urb_list[i]) {
dev_dbg(dev->dev, "free urb=%d\n", i);
/* free the URBs */
usb_free_urb(dev->urb_list[i]);
}
}
dev->urbs_initialized = 0;
return 0;
}
static int hackrf_alloc_urbs(struct hackrf_dev *dev)
{
int i, j;
/* allocate the URBs */
for (i = 0; i < MAX_BULK_BUFS; i++) {
dev_dbg(dev->dev, "alloc urb=%d\n", i);
dev->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
if (!dev->urb_list[i]) {
dev_dbg(dev->dev, "failed\n");
for (j = 0; j < i; j++)
usb_free_urb(dev->urb_list[j]);
return -ENOMEM;
}
usb_fill_bulk_urb(dev->urb_list[i],
dev->udev,
usb_rcvbulkpipe(dev->udev, 0x81),
dev->buf_list[i],
BULK_BUFFER_SIZE,
hackrf_urb_complete, dev);
dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
dev->urbs_initialized++;
}
return 0;
}
/* Must be called with vb_queue_lock hold */
static void hackrf_cleanup_queued_bufs(struct hackrf_dev *dev)
{
unsigned long flags;
dev_dbg(dev->dev, "\n");
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
while (!list_empty(&dev->queued_bufs)) {
struct hackrf_frame_buf *buf;
buf = list_entry(dev->queued_bufs.next,
struct hackrf_frame_buf, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
}
/* The user yanked out the cable... */
static void hackrf_disconnect(struct usb_interface *intf)
{
struct v4l2_device *v = usb_get_intfdata(intf);
struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev);
dev_dbg(dev->dev, "\n");
mutex_lock(&dev->vb_queue_lock);
mutex_lock(&dev->v4l2_lock);
/* No need to keep the urbs around after disconnection */
dev->udev = NULL;
v4l2_device_disconnect(&dev->v4l2_dev);
video_unregister_device(&dev->vdev);
mutex_unlock(&dev->v4l2_lock);
mutex_unlock(&dev->vb_queue_lock);
v4l2_device_put(&dev->v4l2_dev);
}
/* Videobuf2 operations */
static int hackrf_queue_setup(struct vb2_queue *vq,
const struct v4l2_format *fmt, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
{
struct hackrf_dev *dev = vb2_get_drv_priv(vq);
dev_dbg(dev->dev, "nbuffers=%d\n", *nbuffers);
/* Need at least 8 buffers */
if (vq->num_buffers + *nbuffers < 8)
*nbuffers = 8 - vq->num_buffers;
*nplanes = 1;
sizes[0] = PAGE_ALIGN(dev->buffersize);
dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
return 0;
}
static void hackrf_buf_queue(struct vb2_buffer *vb)
{
struct hackrf_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct hackrf_frame_buf *buf =
container_of(vb, struct hackrf_frame_buf, vb);
unsigned long flags;
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
list_add_tail(&buf->list, &dev->queued_bufs);
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
}
static int hackrf_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct hackrf_dev *dev = vb2_get_drv_priv(vq);
int ret;
dev_dbg(dev->dev, "\n");
if (!dev->udev)
return -ENODEV;
mutex_lock(&dev->v4l2_lock);
dev->sequence = 0;
set_bit(POWER_ON, &dev->flags);
ret = hackrf_alloc_stream_bufs(dev);
if (ret)
goto err;
ret = hackrf_alloc_urbs(dev);
if (ret)
goto err;
ret = hackrf_submit_urbs(dev);
if (ret)
goto err;
/* start hardware streaming */
ret = hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 1, 0, NULL, 0);
if (ret)
goto err;
goto exit_mutex_unlock;
err:
hackrf_kill_urbs(dev);
hackrf_free_urbs(dev);
hackrf_free_stream_bufs(dev);
clear_bit(POWER_ON, &dev->flags);
/* return all queued buffers to vb2 */
{
struct hackrf_frame_buf *buf, *tmp;
list_for_each_entry_safe(buf, tmp, &dev->queued_bufs, list) {
list_del(&buf->list);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
}
}
exit_mutex_unlock:
mutex_unlock(&dev->v4l2_lock);
return ret;
}
static void hackrf_stop_streaming(struct vb2_queue *vq)
{
struct hackrf_dev *dev = vb2_get_drv_priv(vq);
dev_dbg(dev->dev, "\n");
mutex_lock(&dev->v4l2_lock);
/* stop hardware streaming */
hackrf_ctrl_msg(dev, CMD_SET_TRANSCEIVER_MODE, 0, 0, NULL, 0);
hackrf_kill_urbs(dev);
hackrf_free_urbs(dev);
hackrf_free_stream_bufs(dev);
hackrf_cleanup_queued_bufs(dev);
clear_bit(POWER_ON, &dev->flags);
mutex_unlock(&dev->v4l2_lock);
}
static struct vb2_ops hackrf_vb2_ops = {
.queue_setup = hackrf_queue_setup,
.buf_queue = hackrf_buf_queue,
.start_streaming = hackrf_start_streaming,
.stop_streaming = hackrf_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int hackrf_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
struct hackrf_dev *dev = video_drvdata(file);
dev_dbg(dev->dev, "\n");
strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
strlcpy(cap->card, dev->vdev.name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int hackrf_s_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct hackrf_dev *dev = video_drvdata(file);
struct vb2_queue *q = &dev->vb_queue;
int i;
dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
(char *)&f->fmt.sdr.pixelformat);
if (vb2_is_busy(q))
return -EBUSY;
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
for (i = 0; i < NUM_FORMATS; i++) {
if (f->fmt.sdr.pixelformat == formats[i].pixelformat) {
dev->pixelformat = formats[i].pixelformat;
dev->buffersize = formats[i].buffersize;
f->fmt.sdr.buffersize = formats[i].buffersize;
return 0;
}
}
dev->pixelformat = formats[0].pixelformat;
dev->buffersize = formats[0].buffersize;
f->fmt.sdr.pixelformat = formats[0].pixelformat;
f->fmt.sdr.buffersize = formats[0].buffersize;
return 0;
}
static int hackrf_g_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct hackrf_dev *dev = video_drvdata(file);
dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
(char *)&dev->pixelformat);
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
f->fmt.sdr.pixelformat = dev->pixelformat;
f->fmt.sdr.buffersize = dev->buffersize;
return 0;
}
static int hackrf_try_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct hackrf_dev *dev = video_drvdata(file);
int i;
dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
(char *)&f->fmt.sdr.pixelformat);
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
for (i = 0; i < NUM_FORMATS; i++) {
if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
f->fmt.sdr.buffersize = formats[i].buffersize;
return 0;
}
}
f->fmt.sdr.pixelformat = formats[0].pixelformat;
f->fmt.sdr.buffersize = formats[0].buffersize;
return 0;
}
static int hackrf_enum_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct hackrf_dev *dev = video_drvdata(file);
dev_dbg(dev->dev, "index=%d\n", f->index);
if (f->index >= NUM_FORMATS)
return -EINVAL;
strlcpy(f->description, formats[f->index].name, sizeof(f->description));
f->pixelformat = formats[f->index].pixelformat;
return 0;
}
static int hackrf_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *v)
{
struct hackrf_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "index=%d\n", v->index);
if (v->index == 0)
ret = 0;
else if (v->index == 1)
ret = 0;
else
ret = -EINVAL;
return ret;
}
static int hackrf_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
{
struct hackrf_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "index=%d\n", v->index);
if (v->index == 0) {
strlcpy(v->name, "HackRF ADC", sizeof(v->name));
v->type = V4L2_TUNER_ADC;
v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
v->rangelow = bands_adc[0].rangelow;
v->rangehigh = bands_adc[0].rangehigh;
ret = 0;
} else if (v->index == 1) {
strlcpy(v->name, "HackRF RF", sizeof(v->name));
v->type = V4L2_TUNER_RF;
v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
v->rangelow = bands_rf[0].rangelow;
v->rangehigh = bands_rf[0].rangehigh;
ret = 0;
} else {
ret = -EINVAL;
}
return ret;
}
static int hackrf_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct hackrf_dev *dev = video_drvdata(file);
int ret;
unsigned int upper, lower;
u8 buf[8];
dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
f->tuner, f->type, f->frequency);
if (f->tuner == 0) {
dev->f_adc = clamp_t(unsigned int, f->frequency,
bands_adc[0].rangelow, bands_adc[0].rangehigh);
dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
upper = dev->f_adc;
lower = 1;
buf[0] = (upper >> 0) & 0xff;
buf[1] = (upper >> 8) & 0xff;
buf[2] = (upper >> 16) & 0xff;
buf[3] = (upper >> 24) & 0xff;
buf[4] = (lower >> 0) & 0xff;
buf[5] = (lower >> 8) & 0xff;
buf[6] = (lower >> 16) & 0xff;
buf[7] = (lower >> 24) & 0xff;
ret = hackrf_ctrl_msg(dev, CMD_SAMPLE_RATE_SET, 0, 0, buf, 8);
} else if (f->tuner == 1) {
dev->f_rf = clamp_t(unsigned int, f->frequency,
bands_rf[0].rangelow, bands_rf[0].rangehigh);
dev_dbg(dev->dev, "RF frequency=%u Hz\n", dev->f_rf);
upper = dev->f_rf / 1000000;
lower = dev->f_rf % 1000000;
buf[0] = (upper >> 0) & 0xff;
buf[1] = (upper >> 8) & 0xff;
buf[2] = (upper >> 16) & 0xff;
buf[3] = (upper >> 24) & 0xff;
buf[4] = (lower >> 0) & 0xff;
buf[5] = (lower >> 8) & 0xff;
buf[6] = (lower >> 16) & 0xff;
buf[7] = (lower >> 24) & 0xff;
ret = hackrf_ctrl_msg(dev, CMD_SET_FREQ, 0, 0, buf, 8);
} else {
ret = -EINVAL;
}
return ret;
}
static int hackrf_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct hackrf_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
if (f->tuner == 0) {
f->type = V4L2_TUNER_ADC;
f->frequency = dev->f_adc;
ret = 0;
} else if (f->tuner == 1) {
f->type = V4L2_TUNER_RF;
f->frequency = dev->f_rf;
ret = 0;
} else {
ret = -EINVAL;
}
return ret;
}
static int hackrf_enum_freq_bands(struct file *file, void *priv,
struct v4l2_frequency_band *band)
{
struct hackrf_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "tuner=%d type=%d index=%d\n",
band->tuner, band->type, band->index);
if (band->tuner == 0) {
if (band->index >= ARRAY_SIZE(bands_adc)) {
ret = -EINVAL;
} else {
*band = bands_adc[band->index];
ret = 0;
}
} else if (band->tuner == 1) {
if (band->index >= ARRAY_SIZE(bands_rf)) {
ret = -EINVAL;
} else {
*band = bands_rf[band->index];
ret = 0;
}
} else {
ret = -EINVAL;
}
return ret;
}
static const struct v4l2_ioctl_ops hackrf_ioctl_ops = {
.vidioc_querycap = hackrf_querycap,
.vidioc_s_fmt_sdr_cap = hackrf_s_fmt_sdr_cap,
.vidioc_g_fmt_sdr_cap = hackrf_g_fmt_sdr_cap,
.vidioc_enum_fmt_sdr_cap = hackrf_enum_fmt_sdr_cap,
.vidioc_try_fmt_sdr_cap = hackrf_try_fmt_sdr_cap,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_s_tuner = hackrf_s_tuner,
.vidioc_g_tuner = hackrf_g_tuner,
.vidioc_s_frequency = hackrf_s_frequency,
.vidioc_g_frequency = hackrf_g_frequency,
.vidioc_enum_freq_bands = hackrf_enum_freq_bands,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
.vidioc_log_status = v4l2_ctrl_log_status,
};
static const struct v4l2_file_operations hackrf_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.unlocked_ioctl = video_ioctl2,
};
static struct video_device hackrf_template = {
.name = "HackRF One",
.release = video_device_release_empty,
.fops = &hackrf_fops,
.ioctl_ops = &hackrf_ioctl_ops,
};
static void hackrf_video_release(struct v4l2_device *v)
{
struct hackrf_dev *dev = container_of(v, struct hackrf_dev, v4l2_dev);
v4l2_ctrl_handler_free(&dev->hdl);
v4l2_device_unregister(&dev->v4l2_dev);
kfree(dev);
}
static int hackrf_set_bandwidth(struct hackrf_dev *dev)
{
int ret, i;
u16 u16tmp, u16tmp2;
unsigned int bandwidth;
static const struct {
u32 freq;
} bandwidth_lut[] = {
{ 1750000}, /* 1.75 MHz */
{ 2500000}, /* 2.5 MHz */
{ 3500000}, /* 3.5 MHz */
{ 5000000}, /* 5 MHz */
{ 5500000}, /* 5.5 MHz */
{ 6000000}, /* 6 MHz */
{ 7000000}, /* 7 MHz */
{ 8000000}, /* 8 MHz */
{ 9000000}, /* 9 MHz */
{10000000}, /* 10 MHz */
{12000000}, /* 12 MHz */
{14000000}, /* 14 MHz */
{15000000}, /* 15 MHz */
{20000000}, /* 20 MHz */
{24000000}, /* 24 MHz */
{28000000}, /* 28 MHz */
};
dev_dbg(dev->dev, "bandwidth auto=%d->%d val=%d->%d f_adc=%u\n",
dev->bandwidth_auto->cur.val,
dev->bandwidth_auto->val, dev->bandwidth->cur.val,
dev->bandwidth->val, dev->f_adc);
if (dev->bandwidth_auto->val == true)
bandwidth = dev->f_adc;
else
bandwidth = dev->bandwidth->val;
for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) {
if (bandwidth <= bandwidth_lut[i].freq) {
bandwidth = bandwidth_lut[i].freq;
break;
}
}
dev->bandwidth->val = bandwidth;
dev->bandwidth->cur.val = bandwidth;
dev_dbg(dev->dev, "bandwidth selected=%d\n", bandwidth);
u16tmp = 0;
u16tmp |= ((bandwidth >> 0) & 0xff) << 0;
u16tmp |= ((bandwidth >> 8) & 0xff) << 8;
u16tmp2 = 0;
u16tmp2 |= ((bandwidth >> 16) & 0xff) << 0;
u16tmp2 |= ((bandwidth >> 24) & 0xff) << 8;
ret = hackrf_ctrl_msg(dev, CMD_BASEBAND_FILTER_BANDWIDTH_SET,
u16tmp, u16tmp2, NULL, 0);
if (ret)
dev_dbg(dev->dev, "failed=%d\n", ret);
return ret;
}
static int hackrf_set_lna_gain(struct hackrf_dev *dev)
{
int ret;
u8 u8tmp;
dev_dbg(dev->dev, "lna val=%d->%d\n",
dev->lna_gain->cur.val, dev->lna_gain->val);
ret = hackrf_ctrl_msg(dev, CMD_SET_LNA_GAIN, 0, dev->lna_gain->val,
&u8tmp, 1);
if (ret)
dev_dbg(dev->dev, "failed=%d\n", ret);
return ret;
}
static int hackrf_set_if_gain(struct hackrf_dev *dev)
{
int ret;
u8 u8tmp;
dev_dbg(dev->dev, "val=%d->%d\n",
dev->if_gain->cur.val, dev->if_gain->val);
ret = hackrf_ctrl_msg(dev, CMD_SET_VGA_GAIN, 0, dev->if_gain->val,
&u8tmp, 1);
if (ret)
dev_dbg(dev->dev, "failed=%d\n", ret);
return ret;
}
static int hackrf_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct hackrf_dev *dev = container_of(ctrl->handler,
struct hackrf_dev, hdl);
int ret;
switch (ctrl->id) {
case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
case V4L2_CID_RF_TUNER_BANDWIDTH:
ret = hackrf_set_bandwidth(dev);
break;
case V4L2_CID_RF_TUNER_LNA_GAIN:
ret = hackrf_set_lna_gain(dev);
break;
case V4L2_CID_RF_TUNER_IF_GAIN:
ret = hackrf_set_if_gain(dev);
break;
default:
dev_dbg(dev->dev, "unknown ctrl: id=%d name=%s\n",
ctrl->id, ctrl->name);
ret = -EINVAL;
}
return ret;
}
static const struct v4l2_ctrl_ops hackrf_ctrl_ops = {
.s_ctrl = hackrf_s_ctrl,
};
static int hackrf_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct hackrf_dev *dev;
int ret;
u8 u8tmp, buf[BUF_SIZE];
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
mutex_init(&dev->v4l2_lock);
mutex_init(&dev->vb_queue_lock);
spin_lock_init(&dev->queued_bufs_lock);
INIT_LIST_HEAD(&dev->queued_bufs);
dev->dev = &intf->dev;
dev->udev = interface_to_usbdev(intf);
dev->f_adc = bands_adc[0].rangelow;
dev->f_rf = bands_rf[0].rangelow;
dev->pixelformat = formats[0].pixelformat;
dev->buffersize = formats[0].buffersize;
/* Detect device */
ret = hackrf_ctrl_msg(dev, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
if (ret == 0)
ret = hackrf_ctrl_msg(dev, CMD_VERSION_STRING_READ, 0, 0,
buf, BUF_SIZE);
if (ret) {
dev_err(dev->dev, "Could not detect board\n");
goto err_free_mem;
}
buf[BUF_SIZE - 1] = '\0';
dev_info(dev->dev, "Board ID: %02x\n", u8tmp);
dev_info(dev->dev, "Firmware version: %s\n", buf);
/* Init videobuf2 queue structure */
dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
dev->vb_queue.drv_priv = dev;
dev->vb_queue.buf_struct_size = sizeof(struct hackrf_frame_buf);
dev->vb_queue.ops = &hackrf_vb2_ops;
dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
ret = vb2_queue_init(&dev->vb_queue);
if (ret) {
dev_err(dev->dev, "Could not initialize vb2 queue\n");
goto err_free_mem;
}
/* Init video_device structure */
dev->vdev = hackrf_template;
dev->vdev.queue = &dev->vb_queue;
dev->vdev.queue->lock = &dev->vb_queue_lock;
video_set_drvdata(&dev->vdev, dev);
/* Register the v4l2_device structure */
dev->v4l2_dev.release = hackrf_video_release;
ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
if (ret) {
dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
goto err_free_mem;
}
/* Register controls */
v4l2_ctrl_handler_init(&dev->hdl, 4);
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
V4L2_CID_RF_TUNER_BANDWIDTH,
1750000, 28000000, 50000, 1750000);
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0);
dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
V4L2_CID_RF_TUNER_IF_GAIN, 0, 62, 2, 0);
if (dev->hdl.error) {
ret = dev->hdl.error;
dev_err(dev->dev, "Could not initialize controls\n");
goto err_free_controls;
}
v4l2_ctrl_handler_setup(&dev->hdl);
dev->v4l2_dev.ctrl_handler = &dev->hdl;
dev->vdev.v4l2_dev = &dev->v4l2_dev;
dev->vdev.lock = &dev->v4l2_lock;
ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
if (ret) {
dev_err(dev->dev, "Failed to register as video device (%d)\n",
ret);
goto err_unregister_v4l2_dev;
}
dev_info(dev->dev, "Registered as %s\n",
video_device_node_name(&dev->vdev));
dev_notice(dev->dev, "SDR API is still slightly experimental and functionality changes may follow\n");
return 0;
err_free_controls:
v4l2_ctrl_handler_free(&dev->hdl);
err_unregister_v4l2_dev:
v4l2_device_unregister(&dev->v4l2_dev);
err_free_mem:
kfree(dev);
return ret;
}
/* USB device ID list */
static struct usb_device_id hackrf_id_table[] = {
{ USB_DEVICE(0x1d50, 0x6089) }, /* HackRF One */
{ }
};
MODULE_DEVICE_TABLE(usb, hackrf_id_table);
/* USB subsystem interface */
static struct usb_driver hackrf_driver = {
.name = KBUILD_MODNAME,
.probe = hackrf_probe,
.disconnect = hackrf_disconnect,
.id_table = hackrf_id_table,
};
module_usb_driver(hackrf_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("HackRF");
MODULE_LICENSE("GPL");
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