diff options
Diffstat (limited to 'drivers/media/usb/airspy/airspy.c')
| -rw-r--r-- | drivers/media/usb/airspy/airspy.c | 1110 |
1 files changed, 1110 insertions, 0 deletions
diff --git a/drivers/media/usb/airspy/airspy.c b/drivers/media/usb/airspy/airspy.c new file mode 100644 index 000000000..4069234ab --- /dev/null +++ b/drivers/media/usb/airspy/airspy.c @@ -0,0 +1,1110 @@ +/* + * 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 = 20000000, + }, +}; + +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; + u32 buffersize; +}; + +/* format descriptions for capture and preview */ +static struct airspy_format formats[] = { + { + .name = "Real U12LE", + .pixelformat = V4L2_SDR_FMT_RU12LE, + .buffersize = BULK_BUFFER_SIZE, + }, +}; + +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 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 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; + u32 buffersize; + + /* 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(_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 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->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->dev, request, requesttype, value, + index, s->buf, size); + if (ret < 0) { + dev_err(s->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; + 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 sample rate and output it in 10 seconds intervals */ + if (unlikely(time_is_before_jiffies(s->jiffies_next))) { + #define MSECS 10000UL + unsigned int msecs = jiffies_to_msecs(jiffies - + s->jiffies_next + msecs_to_jiffies(MSECS)); + unsigned int samples = s->sample - s->sample_measured; + + s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); + s->sample_measured = s->sample; + dev_dbg(s->dev, "slen=%u samples=%u msecs=%u 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->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(s->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->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->dev, "kill urb=%d\n", 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->dev, "submit urb=%d\n", i); + ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC); + if (ret) { + dev_err(s->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->dev, "free buf=%d\n", 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->dev, "all in all I will use %u bytes for streaming\n", + 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->dev, "alloc buf=%d failed\n", s->buf_num); + airspy_free_stream_bufs(s); + return -ENOMEM; + } + + dev_dbg(s->dev, "alloc buf=%d %p (dma %llu)\n", 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->dev, "free urb=%d\n", 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->dev, "alloc urb=%d\n", i); + s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC); + if (!s->urb_list[i]) { + dev_dbg(s->dev, "failed\n"); + 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; + + dev_dbg(s->dev, "\n"); + + 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->dev, "\n"); + + 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->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(s->buffersize); + + dev_dbg(s->dev, "nbuffers=%d sizes[0]=%d\n", *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; + + /* 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->dev, "\n"); + + if (!s->udev) + return -ENODEV; + + mutex_lock(&s->v4l2_lock); + + s->sequence = 0; + + set_bit(POWER_ON, &s->flags); + + ret = airspy_alloc_stream_bufs(s); + if (ret) + goto err_clear_bit; + + ret = airspy_alloc_urbs(s); + if (ret) + goto err_free_stream_bufs; + + ret = airspy_submit_urbs(s); + if (ret) + goto err_free_urbs; + + /* start hardware streaming */ + ret = airspy_ctrl_msg(s, CMD_RECEIVER_MODE, 1, 0, NULL, 0); + if (ret) + goto err_kill_urbs; + + goto exit_mutex_unlock; + +err_kill_urbs: + airspy_kill_urbs(s); +err_free_urbs: + airspy_free_urbs(s); +err_free_stream_bufs: + airspy_free_stream_bufs(s); +err_clear_bit: + clear_bit(POWER_ON, &s->flags); + + /* return all queued buffers to vb2 */ + { + struct airspy_frame_buf *buf, *tmp; + + list_for_each_entry_safe(buf, tmp, &s->queued_bufs, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED); + } + } + +exit_mutex_unlock: + mutex_unlock(&s->v4l2_lock); + + return ret; +} + +static void airspy_stop_streaming(struct vb2_queue *vq) +{ + struct airspy *s = vb2_get_drv_priv(vq); + + dev_dbg(s->dev, "\n"); + + mutex_lock(&s->v4l2_lock); + + /* stop hardware streaming */ + 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); + + 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) +{ + 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); + + f->fmt.sdr.pixelformat = s->pixelformat; + f->fmt.sdr.buffersize = s->buffersize; + memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); + + 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; + + 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 = formats[i].pixelformat; + s->buffersize = formats[i].buffersize; + f->fmt.sdr.buffersize = formats[i].buffersize; + return 0; + } + } + + s->pixelformat = formats[0].pixelformat; + s->buffersize = formats[0].buffersize; + f->fmt.sdr.pixelformat = formats[0].pixelformat; + f->fmt.sdr.buffersize = formats[0].buffersize; + + return 0; +} + +static int airspy_try_fmt_sdr_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + int i; + + 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 airspy_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *v) +{ + int ret; + + 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) +{ + int ret; + + 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; + + if (f->tuner == 0) { + f->type = V4L2_TUNER_ADC; + f->frequency = s->f_adc; + dev_dbg(s->dev, "ADC frequency=%u Hz\n", s->f_adc); + ret = 0; + } else if (f->tuner == 1) { + f->type = V4L2_TUNER_RF; + f->frequency = s->f_rf; + dev_dbg(s->dev, "RF frequency=%u Hz\n", s->f_rf); + ret = 0; + } 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]; + + if (f->tuner == 0) { + s->f_adc = clamp_t(unsigned int, f->frequency, + bands[0].rangelow, + bands[0].rangehigh); + dev_dbg(s->dev, "ADC frequency=%u Hz\n", 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->dev, "RF frequency=%u Hz\n", 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) +{ + int ret; + + 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->dev, "lna auto=%d->%d val=%d->%d\n", + 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->dev, "failed=%d\n", ret); + + return ret; +} + +static int airspy_set_mixer_gain(struct airspy *s) +{ + int ret; + u8 u8tmp; + + dev_dbg(s->dev, "mixer auto=%d->%d val=%d->%d\n", + 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->dev, "failed=%d\n", ret); + + return ret; +} + +static int airspy_set_if_gain(struct airspy *s) +{ + int ret; + u8 u8tmp; + + dev_dbg(s->dev, "val=%d->%d\n", 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->dev, "failed=%d\n", 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->dev, "unknown ctrl: id=%d name=%s\n", + 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 airspy *s; + int ret; + u8 u8tmp, buf[BUF_SIZE]; + + s = kzalloc(sizeof(struct airspy), GFP_KERNEL); + if (s == NULL) { + dev_err(&intf->dev, "Could not allocate memory for 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->dev = &intf->dev; + s->udev = interface_to_usbdev(intf); + s->f_adc = bands[0].rangelow; + s->f_rf = bands_rf[0].rangelow; + s->pixelformat = formats[0].pixelformat; + s->buffersize = formats[0].buffersize; + + /* 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->dev, "Could not detect board\n"); + goto err_free_mem; + } + + buf[BUF_SIZE - 1] = '\0'; + + dev_info(s->dev, "Board ID: %02x\n", u8tmp); + dev_info(s->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->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; + 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->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->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->dev, "Failed to register as video device (%d)\n", + ret); + goto err_unregister_v4l2_dev; + } + dev_info(s->dev, "Registered as %s\n", + video_device_node_name(&s->vdev)); + dev_notice(s->dev, "SDR API is still slightly experimental and functionality changes may follow\n"); + 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"); |