--- /dev/null
+/*
+ * AirSpy SDR 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>
+
+/* AirSpy USB API commands (from AirSpy Library) */
+enum {
+ CMD_INVALID = 0x00,
+ CMD_RECEIVER_MODE = 0x01,
+ CMD_SI5351C_WRITE = 0x02,
+ CMD_SI5351C_READ = 0x03,
+ CMD_R820T_WRITE = 0x04,
+ CMD_R820T_READ = 0x05,
+ CMD_SPIFLASH_ERASE = 0x06,
+ CMD_SPIFLASH_WRITE = 0x07,
+ CMD_SPIFLASH_READ = 0x08,
+ CMD_BOARD_ID_READ = 0x09,
+ CMD_VERSION_STRING_READ = 0x0a,
+ CMD_BOARD_PARTID_SERIALNO_READ = 0x0b,
+ CMD_SET_SAMPLE_RATE = 0x0c,
+ CMD_SET_FREQ = 0x0d,
+ CMD_SET_LNA_GAIN = 0x0e,
+ CMD_SET_MIXER_GAIN = 0x0f,
+ CMD_SET_VGA_GAIN = 0x10,
+ CMD_SET_LNA_AGC = 0x11,
+ CMD_SET_MIXER_AGC = 0x12,
+ CMD_SET_PACKING = 0x13,
+};
+
+/*
+ * 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[] = {
+ {
+ .tuner = 0,
+ .type = V4L2_TUNER_ADC,
+ .index = 0,
+ .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
+ .rangelow = 20000000,
+ .rangehigh = 20000001, /* FIXME: make v4l2-compliance happy */
+ },
+};
+
+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 = 24000000,
+ .rangehigh = 1750000000,
+ },
+};
+
+/* stream formats */
+struct airspy_format {
+ char *name;
+ u32 pixelformat;
+};
+
+/* format descriptions for capture and preview */
+static struct airspy_format formats[] = {
+ {
+ .name = "Real U12LE",
+ .pixelformat = V4L2_SDR_FMT_RU12LE,
+ },
+};
+
+static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
+
+/* intermediate buffers with raw data from the USB device */
+struct airspy_frame_buf {
+ struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
+ struct list_head list;
+};
+
+struct airspy {
+#define POWER_ON (1 << 1)
+#define URB_BUF (1 << 2)
+#define USB_STATE_URB_BUF (1 << 3)
+ unsigned long flags;
+
+ 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 and capt_file */
+
+ 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;
+
+ /* Controls */
+ struct v4l2_ctrl_handler hdl;
+ struct v4l2_ctrl *lna_gain_auto;
+ struct v4l2_ctrl *lna_gain;
+ struct v4l2_ctrl *mixer_gain_auto;
+ struct v4l2_ctrl *mixer_gain;
+ struct v4l2_ctrl *if_gain;
+
+ /* Sample rate calc */
+ unsigned long jiffies_next;
+ unsigned int sample;
+ unsigned int sample_measured;
+};
+
+#define airspy_dbg_usb_control_msg(_udev, _r, _t, _v, _i, _b, _l) { \
+ char *_direction; \
+ if (_t & USB_DIR_IN) \
+ _direction = "<<<"; \
+ else \
+ _direction = ">>>"; \
+ dev_dbg(&_udev->dev, "%s: %02x %02x %02x %02x %02x %02x %02x %02x " \
+ "%s %*ph\n", __func__, _t, _r, _v & 0xff, _v >> 8, \
+ _i & 0xff, _i >> 8, _l & 0xff, _l >> 8, _direction, \
+ _l, _b); \
+}
+
+/* execute firmware command */
+static int airspy_ctrl_msg(struct airspy *s, u8 request, u16 value, u16 index,
+ u8 *data, u16 size)
+{
+ int ret;
+ unsigned int pipe;
+ u8 requesttype;
+
+ switch (request) {
+ case CMD_RECEIVER_MODE:
+ case CMD_SET_FREQ:
+ pipe = usb_sndctrlpipe(s->udev, 0);
+ requesttype = (USB_TYPE_VENDOR | USB_DIR_OUT);
+ break;
+ case CMD_BOARD_ID_READ:
+ case CMD_VERSION_STRING_READ:
+ case CMD_BOARD_PARTID_SERIALNO_READ:
+ case CMD_SET_LNA_GAIN:
+ case CMD_SET_MIXER_GAIN:
+ case CMD_SET_VGA_GAIN:
+ case CMD_SET_LNA_AGC:
+ case CMD_SET_MIXER_AGC:
+ pipe = usb_rcvctrlpipe(s->udev, 0);
+ requesttype = (USB_TYPE_VENDOR | USB_DIR_IN);
+ break;
+ default:
+ dev_err(&s->udev->dev, "Unknown command %02x\n", request);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ /* write request */
+ if (!(requesttype & USB_DIR_IN))
+ memcpy(s->buf, data, size);
+
+ ret = usb_control_msg(s->udev, pipe, request, requesttype, value,
+ index, s->buf, size, 1000);
+ airspy_dbg_usb_control_msg(s->udev, request, requesttype, value,
+ index, s->buf, size);
+ if (ret < 0) {
+ dev_err(&s->udev->dev,
+ "usb_control_msg() failed %d request %02x\n",
+ ret, request);
+ goto err;
+ }
+
+ /* read request */
+ if (requesttype & USB_DIR_IN)
+ memcpy(data, s->buf, size);
+
+ return 0;
+err:
+ return ret;
+}
+
+/* Private functions */
+static struct airspy_frame_buf *airspy_get_next_fill_buf(struct airspy *s)
+{
+ unsigned long flags = 0;
+ struct airspy_frame_buf *buf = NULL;
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ if (list_empty(&s->queued_bufs))
+ goto leave;
+
+ buf = list_entry(s->queued_bufs.next,
+ struct airspy_frame_buf, list);
+ list_del(&buf->list);
+leave:
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+ return buf;
+}
+
+static unsigned int airspy_convert_stream(struct airspy *s,
+ void *dst, void *src, unsigned int src_len)
+{
+ unsigned int dst_len;
+
+ if (s->pixelformat == V4L2_SDR_FMT_RU12LE) {
+ memcpy(dst, src, src_len);
+ dst_len = src_len;
+ } else {
+ dst_len = 0;
+ }
+
+ /* calculate samping rate and output it in 10 seconds intervals */
+ if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
+ #define MSECS 10000UL
+ unsigned int samples = s->sample - s->sample_measured;
+ s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
+ s->sample_measured = s->sample;
+ dev_dbg(&s->udev->dev,
+ "slen=%d samples=%u msecs=%lu sample rate=%lu\n",
+ src_len, samples, MSECS,
+ samples * 1000UL / MSECS);
+ }
+
+ /* total number of samples */
+ s->sample += src_len / 2;
+
+ return dst_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 airspy_urb_complete(struct urb *urb)
+{
+ struct airspy *s = urb->context;
+ struct airspy_frame_buf *fbuf;
+
+ dev_dbg_ratelimited(&s->udev->dev,
+ "%s: status=%d length=%d/%d errors=%d\n",
+ __func__, 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(&s->udev->dev, "URB failed %d\n",
+ urb->status);
+ break;
+ }
+
+ if (likely(urb->actual_length > 0)) {
+ void *ptr;
+ unsigned int len;
+ /* get free framebuffer */
+ fbuf = airspy_get_next_fill_buf(s);
+ if (unlikely(fbuf == NULL)) {
+ s->vb_full++;
+ dev_notice_ratelimited(&s->udev->dev,
+ "videobuf is full, %d packets dropped\n",
+ s->vb_full);
+ goto skip;
+ }
+
+ /* fill framebuffer */
+ ptr = vb2_plane_vaddr(&fbuf->vb, 0);
+ len = airspy_convert_stream(s, 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 = s->sequence++;
+ vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
+ }
+skip:
+ usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static int airspy_kill_urbs(struct airspy *s)
+{
+ int i;
+
+ for (i = s->urbs_submitted - 1; i >= 0; i--) {
+ dev_dbg(&s->udev->dev, "%s: kill urb=%d\n", __func__, i);
+ /* stop the URB */
+ usb_kill_urb(s->urb_list[i]);
+ }
+ s->urbs_submitted = 0;
+
+ return 0;
+}
+
+static int airspy_submit_urbs(struct airspy *s)
+{
+ int i, ret;
+
+ for (i = 0; i < s->urbs_initialized; i++) {
+ dev_dbg(&s->udev->dev, "%s: submit urb=%d\n", __func__, i);
+ ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
+ if (ret) {
+ dev_err(&s->udev->dev,
+ "Could not submit URB no. %d - get them all back\n",
+ i);
+ airspy_kill_urbs(s);
+ return ret;
+ }
+ s->urbs_submitted++;
+ }
+
+ return 0;
+}
+
+static int airspy_free_stream_bufs(struct airspy *s)
+{
+ if (s->flags & USB_STATE_URB_BUF) {
+ while (s->buf_num) {
+ s->buf_num--;
+ dev_dbg(&s->udev->dev, "%s: free buf=%d\n",
+ __func__, s->buf_num);
+ usb_free_coherent(s->udev, s->buf_size,
+ s->buf_list[s->buf_num],
+ s->dma_addr[s->buf_num]);
+ }
+ }
+ s->flags &= ~USB_STATE_URB_BUF;
+
+ return 0;
+}
+
+static int airspy_alloc_stream_bufs(struct airspy *s)
+{
+ s->buf_num = 0;
+ s->buf_size = BULK_BUFFER_SIZE;
+
+ dev_dbg(&s->udev->dev,
+ "%s: all in all I will use %u bytes for streaming\n",
+ __func__, MAX_BULK_BUFS * BULK_BUFFER_SIZE);
+
+ for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
+ s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
+ BULK_BUFFER_SIZE, GFP_ATOMIC,
+ &s->dma_addr[s->buf_num]);
+ if (!s->buf_list[s->buf_num]) {
+ dev_dbg(&s->udev->dev, "%s: alloc buf=%d failed\n",
+ __func__, s->buf_num);
+ airspy_free_stream_bufs(s);
+ return -ENOMEM;
+ }
+
+ dev_dbg(&s->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
+ __func__, s->buf_num,
+ s->buf_list[s->buf_num],
+ (long long)s->dma_addr[s->buf_num]);
+ s->flags |= USB_STATE_URB_BUF;
+ }
+
+ return 0;
+}
+
+static int airspy_free_urbs(struct airspy *s)
+{
+ int i;
+
+ airspy_kill_urbs(s);
+
+ for (i = s->urbs_initialized - 1; i >= 0; i--) {
+ if (s->urb_list[i]) {
+ dev_dbg(&s->udev->dev, "%s: free urb=%d\n",
+ __func__, i);
+ /* free the URBs */
+ usb_free_urb(s->urb_list[i]);
+ }
+ }
+ s->urbs_initialized = 0;
+
+ return 0;
+}
+
+static int airspy_alloc_urbs(struct airspy *s)
+{
+ int i, j;
+
+ /* allocate the URBs */
+ for (i = 0; i < MAX_BULK_BUFS; i++) {
+ dev_dbg(&s->udev->dev, "%s: alloc urb=%d\n", __func__, i);
+ s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!s->urb_list[i]) {
+ dev_dbg(&s->udev->dev, "%s: failed\n", __func__);
+ for (j = 0; j < i; j++)
+ usb_free_urb(s->urb_list[j]);
+ return -ENOMEM;
+ }
+ usb_fill_bulk_urb(s->urb_list[i],
+ s->udev,
+ usb_rcvbulkpipe(s->udev, 0x81),
+ s->buf_list[i],
+ BULK_BUFFER_SIZE,
+ airspy_urb_complete, s);
+
+ s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ s->urb_list[i]->transfer_dma = s->dma_addr[i];
+ s->urbs_initialized++;
+ }
+
+ return 0;
+}
+
+/* Must be called with vb_queue_lock hold */
+static void airspy_cleanup_queued_bufs(struct airspy *s)
+{
+ unsigned long flags = 0;
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ while (!list_empty(&s->queued_bufs)) {
+ struct airspy_frame_buf *buf;
+ buf = list_entry(s->queued_bufs.next,
+ struct airspy_frame_buf, list);
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+}
+
+/* The user yanked out the cable... */
+static void airspy_disconnect(struct usb_interface *intf)
+{
+ struct v4l2_device *v = usb_get_intfdata(intf);
+ struct airspy *s = container_of(v, struct airspy, v4l2_dev);
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ mutex_lock(&s->vb_queue_lock);
+ mutex_lock(&s->v4l2_lock);
+ /* No need to keep the urbs around after disconnection */
+ s->udev = NULL;
+ v4l2_device_disconnect(&s->v4l2_dev);
+ video_unregister_device(&s->vdev);
+ mutex_unlock(&s->v4l2_lock);
+ mutex_unlock(&s->vb_queue_lock);
+
+ v4l2_device_put(&s->v4l2_dev);
+}
+
+/* Videobuf2 operations */
+static int airspy_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt, unsigned int *nbuffers,
+ unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct airspy *s = vb2_get_drv_priv(vq);
+
+ dev_dbg(&s->udev->dev, "%s: *nbuffers=%d\n", __func__, *nbuffers);
+
+ /* Need at least 8 buffers */
+ if (vq->num_buffers + *nbuffers < 8)
+ *nbuffers = 8 - vq->num_buffers;
+ *nplanes = 1;
+ sizes[0] = PAGE_ALIGN(BULK_BUFFER_SIZE);
+
+ dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
+ __func__, *nbuffers, sizes[0]);
+ return 0;
+}
+
+static void airspy_buf_queue(struct vb2_buffer *vb)
+{
+ struct airspy *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct airspy_frame_buf *buf =
+ container_of(vb, struct airspy_frame_buf, vb);
+ unsigned long flags = 0;
+
+ /* Check the device has not disconnected between prep and queuing */
+ if (unlikely(!s->udev)) {
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ return;
+ }
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ list_add_tail(&buf->list, &s->queued_bufs);
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+}
+
+static int airspy_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct airspy *s = vb2_get_drv_priv(vq);
+ int ret;
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (!s->udev)
+ return -ENODEV;
+
+ mutex_lock(&s->v4l2_lock);
+
+ set_bit(POWER_ON, &s->flags);
+
+ s->sequence = 0;
+
+ ret = airspy_alloc_stream_bufs(s);
+ if (ret)
+ goto err;
+
+ ret = airspy_alloc_urbs(s);
+ if (ret)
+ goto err;
+
+ ret = airspy_submit_urbs(s);
+ if (ret)
+ goto err;
+
+ /* start hardware streaming */
+ ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0);
+ if (ret)
+ goto err;
+err:
+ mutex_unlock(&s->v4l2_lock);
+
+ return ret;
+}
+
+static void airspy_stop_streaming(struct vb2_queue *vq)
+{
+ struct airspy *s = vb2_get_drv_priv(vq);
+ int ret;
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ mutex_lock(&s->v4l2_lock);
+
+ /* stop hardware streaming */
+ ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 0, 0, NULL, 0);
+
+ airspy_kill_urbs(s);
+ airspy_free_urbs(s);
+ airspy_free_stream_bufs(s);
+
+ airspy_cleanup_queued_bufs(s);
+
+ clear_bit(POWER_ON, &s->flags);
+
+ mutex_unlock(&s->v4l2_lock);
+}
+
+static struct vb2_ops airspy_vb2_ops = {
+ .queue_setup = airspy_queue_setup,
+ .buf_queue = airspy_buf_queue,
+ .start_streaming = airspy_start_streaming,
+ .stop_streaming = airspy_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int airspy_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct airspy *s = video_drvdata(file);
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
+ strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
+ usb_make_path(s->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 airspy_enum_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct airspy *s = video_drvdata(file);
+
+ dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, 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 airspy_g_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct airspy *s = video_drvdata(file);
+
+ dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
+ (char *)&s->pixelformat);
+
+ memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
+ f->fmt.sdr.pixelformat = s->pixelformat;
+
+ return 0;
+}
+
+static int airspy_s_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct airspy *s = video_drvdata(file);
+ struct vb2_queue *q = &s->vb_queue;
+ int i;
+
+ dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
+ (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 (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
+ s->pixelformat = f->fmt.sdr.pixelformat;
+ return 0;
+ }
+ }
+
+ f->fmt.sdr.pixelformat = formats[0].pixelformat;
+ s->pixelformat = formats[0].pixelformat;
+
+ return 0;
+}
+
+static int airspy_try_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct airspy *s = video_drvdata(file);
+ int i;
+
+ dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
+ (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)
+ return 0;
+ }
+
+ f->fmt.sdr.pixelformat = formats[0].pixelformat;
+
+ return 0;
+}
+
+static int airspy_s_tuner(struct file *file, void *priv,
+ const struct v4l2_tuner *v)
+{
+ struct airspy *s = video_drvdata(file);
+ int ret;
+
+ dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
+
+ if (v->index == 0)
+ ret = 0;
+ else if (v->index == 1)
+ ret = 0;
+ else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static int airspy_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
+{
+ struct airspy *s = video_drvdata(file);
+ int ret;
+
+ dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
+
+ if (v->index == 0) {
+ strlcpy(v->name, "AirSpy ADC", sizeof(v->name));
+ v->type = V4L2_TUNER_ADC;
+ v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
+ v->rangelow = bands[0].rangelow;
+ v->rangehigh = bands[0].rangehigh;
+ ret = 0;
+ } else if (v->index == 1) {
+ strlcpy(v->name, "AirSpy 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 airspy_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct airspy *s = video_drvdata(file);
+ int ret = 0;
+ dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d\n",
+ __func__, f->tuner, f->type);
+
+ if (f->tuner == 0) {
+ f->type = V4L2_TUNER_ADC;
+ f->frequency = s->f_adc;
+ ret = 0;
+ } else if (f->tuner == 1) {
+ f->type = V4L2_TUNER_RF;
+ f->frequency = s->f_rf;
+ } else {
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int airspy_s_frequency(struct file *file, void *priv,
+ const struct v4l2_frequency *f)
+{
+ struct airspy *s = video_drvdata(file);
+ int ret;
+ u8 buf[4];
+
+ dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d frequency=%u\n",
+ __func__, f->tuner, f->type, f->frequency);
+
+ if (f->tuner == 0) {
+ s->f_adc = clamp_t(unsigned int, f->frequency,
+ bands[0].rangelow,
+ bands[0].rangehigh);
+ dev_dbg(&s->udev->dev, "%s: ADC frequency=%u Hz\n",
+ __func__, s->f_adc);
+ ret = 0;
+ } else if (f->tuner == 1) {
+ s->f_rf = clamp_t(unsigned int, f->frequency,
+ bands_rf[0].rangelow,
+ bands_rf[0].rangehigh);
+ dev_dbg(&s->udev->dev, "%s: RF frequency=%u Hz\n",
+ __func__, s->f_rf);
+ buf[0] = (s->f_rf >> 0) & 0xff;
+ buf[1] = (s->f_rf >> 8) & 0xff;
+ buf[2] = (s->f_rf >> 16) & 0xff;
+ buf[3] = (s->f_rf >> 24) & 0xff;
+ ret = airspy_ctrl_msg(s, CMD_SET_FREQ, 0, 0, buf, 4);
+ } else {
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int airspy_enum_freq_bands(struct file *file, void *priv,
+ struct v4l2_frequency_band *band)
+{
+ struct airspy *s = video_drvdata(file);
+ int ret;
+ dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d index=%d\n",
+ __func__, band->tuner, band->type, band->index);
+
+ if (band->tuner == 0) {
+ if (band->index >= ARRAY_SIZE(bands)) {
+ ret = -EINVAL;
+ } else {
+ *band = bands[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 airspy_ioctl_ops = {
+ .vidioc_querycap = airspy_querycap,
+
+ .vidioc_enum_fmt_sdr_cap = airspy_enum_fmt_sdr_cap,
+ .vidioc_g_fmt_sdr_cap = airspy_g_fmt_sdr_cap,
+ .vidioc_s_fmt_sdr_cap = airspy_s_fmt_sdr_cap,
+ .vidioc_try_fmt_sdr_cap = airspy_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_g_tuner = airspy_g_tuner,
+ .vidioc_s_tuner = airspy_s_tuner,
+
+ .vidioc_g_frequency = airspy_g_frequency,
+ .vidioc_s_frequency = airspy_s_frequency,
+ .vidioc_enum_freq_bands = airspy_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 airspy_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 airspy_template = {
+ .name = "AirSpy SDR",
+ .release = video_device_release_empty,
+ .fops = &airspy_fops,
+ .ioctl_ops = &airspy_ioctl_ops,
+};
+
+static void airspy_video_release(struct v4l2_device *v)
+{
+ struct airspy *s = container_of(v, struct airspy, v4l2_dev);
+
+ v4l2_ctrl_handler_free(&s->hdl);
+ v4l2_device_unregister(&s->v4l2_dev);
+ kfree(s);
+}
+
+static int airspy_set_lna_gain(struct airspy *s)
+{
+ int ret;
+ u8 u8tmp;
+
+ dev_dbg(&s->udev->dev, "%s: lna auto=%d->%d val=%d->%d\n",
+ __func__, s->lna_gain_auto->cur.val,
+ s->lna_gain_auto->val, s->lna_gain->cur.val,
+ s->lna_gain->val);
+
+ ret = airspy_ctrl_msg(s, CMD_SET_LNA_AGC, 0, s->lna_gain_auto->val,
+ &u8tmp, 1);
+ if (ret)
+ goto err;
+
+ if (s->lna_gain_auto->val == false) {
+ ret = airspy_ctrl_msg(s, CMD_SET_LNA_GAIN, 0, s->lna_gain->val,
+ &u8tmp, 1);
+ if (ret)
+ goto err;
+ }
+err:
+ if (ret)
+ dev_dbg(&s->udev->dev, "%s: failed=%d\n", __func__, ret);
+
+ return ret;
+}
+
+static int airspy_set_mixer_gain(struct airspy *s)
+{
+ int ret;
+ u8 u8tmp;
+
+ dev_dbg(&s->udev->dev, "%s: mixer auto=%d->%d val=%d->%d\n",
+ __func__, s->mixer_gain_auto->cur.val,
+ s->mixer_gain_auto->val, s->mixer_gain->cur.val,
+ s->mixer_gain->val);
+
+ ret = airspy_ctrl_msg(s, CMD_SET_MIXER_AGC, 0, s->mixer_gain_auto->val,
+ &u8tmp, 1);
+ if (ret)
+ goto err;
+
+ if (s->mixer_gain_auto->val == false) {
+ ret = airspy_ctrl_msg(s, CMD_SET_MIXER_GAIN, 0,
+ s->mixer_gain->val, &u8tmp, 1);
+ if (ret)
+ goto err;
+ }
+err:
+ if (ret)
+ dev_dbg(&s->udev->dev, "%s: failed=%d\n", __func__, ret);
+
+ return ret;
+}
+
+static int airspy_set_if_gain(struct airspy *s)
+{
+ int ret;
+ u8 u8tmp;
+
+ dev_dbg(&s->udev->dev, "%s: val=%d->%d\n",
+ __func__, s->if_gain->cur.val, s->if_gain->val);
+
+ ret = airspy_ctrl_msg(s, CMD_SET_VGA_GAIN, 0, s->if_gain->val,
+ &u8tmp, 1);
+ if (ret)
+ goto err;
+err:
+ if (ret)
+ dev_dbg(&s->udev->dev, "%s: failed=%d\n", __func__, ret);
+
+ return ret;
+}
+
+static int airspy_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct airspy *s = container_of(ctrl->handler, struct airspy, hdl);
+ int ret;
+
+ switch (ctrl->id) {
+ case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
+ case V4L2_CID_RF_TUNER_LNA_GAIN:
+ ret = airspy_set_lna_gain(s);
+ break;
+ case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
+ case V4L2_CID_RF_TUNER_MIXER_GAIN:
+ ret = airspy_set_mixer_gain(s);
+ break;
+ case V4L2_CID_RF_TUNER_IF_GAIN:
+ ret = airspy_set_if_gain(s);
+ break;
+ default:
+ dev_dbg(&s->udev->dev, "%s: unknown ctrl: id=%d name=%s\n",
+ __func__, ctrl->id, ctrl->name);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops airspy_ctrl_ops = {
+ .s_ctrl = airspy_s_ctrl,
+};
+
+static int airspy_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct airspy *s = NULL;
+ int ret;
+ u8 u8tmp, buf[BUF_SIZE];
+
+ s = kzalloc(sizeof(struct airspy), GFP_KERNEL);
+ if (s == NULL) {
+ dev_err(&udev->dev,
+ "Could not allocate memory for airspy state\n");
+ return -ENOMEM;
+ }
+
+ mutex_init(&s->v4l2_lock);
+ mutex_init(&s->vb_queue_lock);
+ spin_lock_init(&s->queued_bufs_lock);
+ INIT_LIST_HEAD(&s->queued_bufs);
+ s->udev = udev;
+ s->f_adc = bands[0].rangelow;
+ s->f_rf = bands_rf[0].rangelow;
+ s->pixelformat = V4L2_SDR_FMT_RU12LE;
+
+ /* Detect device */
+ ret = airspy_ctrl_msg(s, CMD_BOARD_ID_READ, 0, 0, &u8tmp, 1);
+ if (ret == 0)
+ ret = airspy_ctrl_msg(s, CMD_VERSION_STRING_READ, 0, 0,
+ buf, BUF_SIZE);
+ if (ret) {
+ dev_err(&s->udev->dev, "Could not detect board\n");
+ goto err_free_mem;
+ }
+
+ buf[BUF_SIZE - 1] = '\0';
+
+ dev_info(&s->udev->dev, "Board ID: %02x\n", u8tmp);
+ dev_info(&s->udev->dev, "Firmware version: %s\n", buf);
+
+ /* Init videobuf2 queue structure */
+ s->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
+ s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+ s->vb_queue.drv_priv = s;
+ s->vb_queue.buf_struct_size = sizeof(struct airspy_frame_buf);
+ s->vb_queue.ops = &airspy_vb2_ops;
+ s->vb_queue.mem_ops = &vb2_vmalloc_memops;
+ s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ ret = vb2_queue_init(&s->vb_queue);
+ if (ret) {
+ dev_err(&s->udev->dev, "Could not initialize vb2 queue\n");
+ goto err_free_mem;
+ }
+
+ /* Init video_device structure */
+ s->vdev = airspy_template;
+ s->vdev.queue = &s->vb_queue;
+ s->vdev.queue->lock = &s->vb_queue_lock;
+ set_bit(V4L2_FL_USE_FH_PRIO, &s->vdev.flags);
+ video_set_drvdata(&s->vdev, s);
+
+ /* Register the v4l2_device structure */
+ s->v4l2_dev.release = airspy_video_release;
+ ret = v4l2_device_register(&intf->dev, &s->v4l2_dev);
+ if (ret) {
+ dev_err(&s->udev->dev,
+ "Failed to register v4l2-device (%d)\n", ret);
+ goto err_free_mem;
+ }
+
+ /* Register controls */
+ v4l2_ctrl_handler_init(&s->hdl, 5);
+ s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
+ V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 0);
+ s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
+ V4L2_CID_RF_TUNER_LNA_GAIN, 0, 14, 1, 8);
+ v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
+ s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
+ V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 0);
+ s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
+ V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 15, 1, 8);
+ v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
+ s->if_gain = v4l2_ctrl_new_std(&s->hdl, &airspy_ctrl_ops,
+ V4L2_CID_RF_TUNER_IF_GAIN, 0, 15, 1, 0);
+ if (s->hdl.error) {
+ ret = s->hdl.error;
+ dev_err(&s->udev->dev, "Could not initialize controls\n");
+ goto err_free_controls;
+ }
+
+ v4l2_ctrl_handler_setup(&s->hdl);
+
+ s->v4l2_dev.ctrl_handler = &s->hdl;
+ s->vdev.v4l2_dev = &s->v4l2_dev;
+ s->vdev.lock = &s->v4l2_lock;
+
+ ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1);
+ if (ret) {
+ dev_err(&s->udev->dev,
+ "Failed to register as video device (%d)\n",
+ ret);
+ goto err_unregister_v4l2_dev;
+ }
+ dev_info(&s->udev->dev, "Registered as %s\n",
+ video_device_node_name(&s->vdev));
+
+ return 0;
+
+err_free_controls:
+ v4l2_ctrl_handler_free(&s->hdl);
+err_unregister_v4l2_dev:
+ v4l2_device_unregister(&s->v4l2_dev);
+err_free_mem:
+ kfree(s);
+ return ret;
+}
+
+/* USB device ID list */
+static struct usb_device_id airspy_id_table[] = {
+ { USB_DEVICE(0x1d50, 0x60a1) }, /* AirSpy */
+ { }
+};
+MODULE_DEVICE_TABLE(usb, airspy_id_table);
+
+/* USB subsystem interface */
+static struct usb_driver airspy_driver = {
+ .name = KBUILD_MODNAME,
+ .probe = airspy_probe,
+ .disconnect = airspy_disconnect,
+ .id_table = airspy_id_table,
+};
+
+module_usb_driver(airspy_driver);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("AirSpy SDR");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff