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path: root/drivers/media/usb/hackrf/hackrf.c
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-rw-r--r--drivers/media/usb/hackrf/hackrf.c1142
1 files changed, 1142 insertions, 0 deletions
diff --git a/drivers/media/usb/hackrf/hackrf.c b/drivers/media/usb/hackrf/hackrf.c
new file mode 100644
index 0000000..328b5ba
--- /dev/null
+++ b/drivers/media/usb/hackrf/hackrf.c
@@ -0,0 +1,1142 @@
+/*
+ * 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_lut[i].freq);
+
+ 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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