--- /dev/null
+/*
+ * Mirics MSi3101 SDR Dongle driver
+ *
+ * Copyright (C) 2013 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * That driver is somehow based of pwc driver:
+ * (C) 1999-2004 Nemosoft Unv.
+ * (C) 2004-2006 Luc Saillard (luc@saillard.org)
+ * (C) 2011 Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <asm/div64.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <linux/usb.h>
+#include <media/videobuf2-vmalloc.h>
+#include <linux/spi/spi.h>
+
+static bool msi2500_emulated_fmt;
+module_param_named(emulated_formats, msi2500_emulated_fmt, bool, 0644);
+MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
+
+/*
+ * iConfiguration 0
+ * bInterfaceNumber 0
+ * bAlternateSetting 1
+ * bNumEndpoints 1
+ * bEndpointAddress 0x81 EP 1 IN
+ * bmAttributes 1
+ * Transfer Type Isochronous
+ * wMaxPacketSize 0x1400 3x 1024 bytes
+ * bInterval 1
+ */
+#define MAX_ISO_BUFS (8)
+#define ISO_FRAMES_PER_DESC (8)
+#define ISO_MAX_FRAME_SIZE (3 * 1024)
+#define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
+#define MAX_ISOC_ERRORS 20
+
+/*
+ * TODO: These formats should be moved to V4L2 API. Formats are currently
+ * disabled from formats[] table, not visible to userspace.
+ */
+ /* signed 12-bit */
+#define MSI2500_PIX_FMT_SDR_S12 v4l2_fourcc('D', 'S', '1', '2')
+/* Mirics MSi2500 format 384 */
+#define MSI2500_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4')
+
+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 = 1200000,
+ .rangehigh = 15000000,
+ },
+};
+
+/* stream formats */
+struct msi2500_format {
+ char *name;
+ u32 pixelformat;
+ u32 buffersize;
+};
+
+/* format descriptions for capture and preview */
+static struct msi2500_format formats[] = {
+ {
+ .name = "Complex S8",
+ .pixelformat = V4L2_SDR_FMT_CS8,
+ .buffersize = 3 * 1008,
+#if 0
+ }, {
+ .name = "10+2-bit signed",
+ .pixelformat = MSI2500_PIX_FMT_SDR_MSI2500_384,
+ }, {
+ .name = "12-bit signed",
+ .pixelformat = MSI2500_PIX_FMT_SDR_S12,
+#endif
+ }, {
+ .name = "Complex S14LE",
+ .pixelformat = V4L2_SDR_FMT_CS14LE,
+ .buffersize = 3 * 1008,
+ }, {
+ .name = "Complex U8 (emulated)",
+ .pixelformat = V4L2_SDR_FMT_CU8,
+ .buffersize = 3 * 1008,
+ }, {
+ .name = "Complex U16LE (emulated)",
+ .pixelformat = V4L2_SDR_FMT_CU16LE,
+ .buffersize = 3 * 1008,
+ },
+};
+
+static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
+
+/* intermediate buffers with raw data from the USB device */
+struct msi2500_frame_buf {
+ struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
+ struct list_head list;
+};
+
+struct msi2500_state {
+ struct device *dev;
+ struct video_device vdev;
+ struct v4l2_device v4l2_dev;
+ struct v4l2_subdev *v4l2_subdev;
+ struct spi_master *master;
+
+ /* videobuf2 queue and queued buffers list */
+ struct vb2_queue vb_queue;
+ struct list_head queued_bufs;
+ spinlock_t queued_bufs_lock; /* Protects queued_bufs */
+
+ /* 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 */
+
+ /* Pointer to our usb_device, will be NULL after unplug */
+ struct usb_device *udev; /* Both mutexes most be hold when setting! */
+
+ unsigned int f_adc;
+ u32 pixelformat;
+ u32 buffersize;
+ unsigned int num_formats;
+
+ unsigned int isoc_errors; /* number of contiguous ISOC errors */
+ unsigned int vb_full; /* vb is full and packets dropped */
+
+ struct urb *urbs[MAX_ISO_BUFS];
+
+ /* Controls */
+ struct v4l2_ctrl_handler hdl;
+
+ u32 next_sample; /* for track lost packets */
+ u32 sample; /* for sample rate calc */
+ unsigned long jiffies_next;
+};
+
+/* Private functions */
+static struct msi2500_frame_buf *msi2500_get_next_fill_buf(
+ struct msi2500_state *s)
+{
+ unsigned long flags;
+ struct msi2500_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 msi2500_frame_buf, list);
+ list_del(&buf->list);
+leave:
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+ return buf;
+}
+
+/*
+ * +===========================================================================
+ * | 00-1023 | USB packet type '504'
+ * +===========================================================================
+ * | 00- 03 | sequence number of first sample in that USB packet
+ * +---------------------------------------------------------------------------
+ * | 04- 15 | garbage
+ * +---------------------------------------------------------------------------
+ * | 16-1023 | samples
+ * +---------------------------------------------------------------------------
+ * signed 8-bit sample
+ * 504 * 2 = 1008 samples
+ *
+ *
+ * +===========================================================================
+ * | 00-1023 | USB packet type '384'
+ * +===========================================================================
+ * | 00- 03 | sequence number of first sample in that USB packet
+ * +---------------------------------------------------------------------------
+ * | 04- 15 | garbage
+ * +---------------------------------------------------------------------------
+ * | 16- 175 | samples
+ * +---------------------------------------------------------------------------
+ * | 176- 179 | control bits for previous samples
+ * +---------------------------------------------------------------------------
+ * | 180- 339 | samples
+ * +---------------------------------------------------------------------------
+ * | 340- 343 | control bits for previous samples
+ * +---------------------------------------------------------------------------
+ * | 344- 503 | samples
+ * +---------------------------------------------------------------------------
+ * | 504- 507 | control bits for previous samples
+ * +---------------------------------------------------------------------------
+ * | 508- 667 | samples
+ * +---------------------------------------------------------------------------
+ * | 668- 671 | control bits for previous samples
+ * +---------------------------------------------------------------------------
+ * | 672- 831 | samples
+ * +---------------------------------------------------------------------------
+ * | 832- 835 | control bits for previous samples
+ * +---------------------------------------------------------------------------
+ * | 836- 995 | samples
+ * +---------------------------------------------------------------------------
+ * | 996- 999 | control bits for previous samples
+ * +---------------------------------------------------------------------------
+ * | 1000-1023 | garbage
+ * +---------------------------------------------------------------------------
+ *
+ * Bytes 4 - 7 could have some meaning?
+ *
+ * Control bits for previous samples is 32-bit field, containing 16 x 2-bit
+ * numbers. This results one 2-bit number for 8 samples. It is likely used for
+ * for bit shifting sample by given bits, increasing actual sampling resolution.
+ * Number 2 (0b10) was never seen.
+ *
+ * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
+ *
+ *
+ * +===========================================================================
+ * | 00-1023 | USB packet type '336'
+ * +===========================================================================
+ * | 00- 03 | sequence number of first sample in that USB packet
+ * +---------------------------------------------------------------------------
+ * | 04- 15 | garbage
+ * +---------------------------------------------------------------------------
+ * | 16-1023 | samples
+ * +---------------------------------------------------------------------------
+ * signed 12-bit sample
+ *
+ *
+ * +===========================================================================
+ * | 00-1023 | USB packet type '252'
+ * +===========================================================================
+ * | 00- 03 | sequence number of first sample in that USB packet
+ * +---------------------------------------------------------------------------
+ * | 04- 15 | garbage
+ * +---------------------------------------------------------------------------
+ * | 16-1023 | samples
+ * +---------------------------------------------------------------------------
+ * signed 14-bit sample
+ */
+
+static int msi2500_convert_stream(struct msi2500_state *s, u8 *dst, u8 *src,
+ unsigned int src_len)
+{
+ unsigned int i, j, transactions, dst_len = 0;
+ u32 sample[3];
+
+ /* There could be 1-3 1024 byte transactions per packet */
+ transactions = src_len / 1024;
+
+ for (i = 0; i < transactions; i++) {
+ sample[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 |
+ src[0] << 0;
+ if (i == 0 && s->next_sample != sample[0]) {
+ dev_dbg_ratelimited(s->dev,
+ "%d samples lost, %d %08x:%08x\n",
+ sample[0] - s->next_sample,
+ src_len, s->next_sample, sample[0]);
+ }
+
+ /*
+ * Dump all unknown 'garbage' data - maybe we will discover
+ * someday if there is something rational...
+ */
+ dev_dbg_ratelimited(s->dev, "%*ph\n", 12, &src[4]);
+
+ src += 16; /* skip header */
+
+ switch (s->pixelformat) {
+ case V4L2_SDR_FMT_CU8: /* 504 x IQ samples */
+ {
+ s8 *s8src = (s8 *) src;
+ u8 *u8dst = (u8 *) dst;
+
+ for (j = 0; j < 1008; j++)
+ *u8dst++ = *s8src++ + 128;
+
+ src += 1008;
+ dst += 1008;
+ dst_len += 1008;
+ s->next_sample = sample[i] + 504;
+ break;
+ }
+ case V4L2_SDR_FMT_CU16LE: /* 252 x IQ samples */
+ {
+ s16 *s16src = (s16 *) src;
+ u16 *u16dst = (u16 *) dst;
+ struct {signed int x:14; } se; /* sign extension */
+ unsigned int utmp;
+
+ for (j = 0; j < 1008; j += 2) {
+ /* sign extension from 14-bit to signed int */
+ se.x = *s16src++;
+ /* from signed int to unsigned int */
+ utmp = se.x + 8192;
+ /* from 14-bit to 16-bit */
+ *u16dst++ = utmp << 2 | utmp >> 12;
+ }
+
+ src += 1008;
+ dst += 1008;
+ dst_len += 1008;
+ s->next_sample = sample[i] + 252;
+ break;
+ }
+ case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
+ /* Dump unknown 'garbage' data */
+ dev_dbg_ratelimited(s->dev, "%*ph\n", 24, &src[1000]);
+ memcpy(dst, src, 984);
+ src += 984 + 24;
+ dst += 984;
+ dst_len += 984;
+ s->next_sample = sample[i] + 384;
+ break;
+ case V4L2_SDR_FMT_CS8: /* 504 x IQ samples */
+ memcpy(dst, src, 1008);
+ src += 1008;
+ dst += 1008;
+ dst_len += 1008;
+ s->next_sample = sample[i] + 504;
+ break;
+ case MSI2500_PIX_FMT_SDR_S12: /* 336 x IQ samples */
+ memcpy(dst, src, 1008);
+ src += 1008;
+ dst += 1008;
+ dst_len += 1008;
+ s->next_sample = sample[i] + 336;
+ break;
+ case V4L2_SDR_FMT_CS14LE: /* 252 x IQ samples */
+ memcpy(dst, src, 1008);
+ src += 1008;
+ dst += 1008;
+ dst_len += 1008;
+ s->next_sample = sample[i] + 252;
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* 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->next_sample - s->sample;
+
+ s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
+ s->sample = s->next_sample;
+ dev_dbg(s->dev, "size=%u samples=%u msecs=%u sample rate=%lu\n",
+ src_len, samples, msecs,
+ samples * 1000UL / msecs);
+ }
+
+ return dst_len;
+}
+
+/*
+ * This gets called for the Isochronous pipe (stream). This is done in interrupt
+ * time, so it has to be fast, not crash, and not stall. Neat.
+ */
+static void msi2500_isoc_handler(struct urb *urb)
+{
+ struct msi2500_state *s = (struct msi2500_state *)urb->context;
+ int i, flen, fstatus;
+ unsigned char *iso_buf = NULL;
+ struct msi2500_frame_buf *fbuf;
+
+ if (unlikely(urb->status == -ENOENT || urb->status == -ECONNRESET ||
+ urb->status == -ESHUTDOWN)) {
+ dev_dbg(s->dev, "URB (%p) unlinked %ssynchronuously\n",
+ urb, urb->status == -ENOENT ? "" : "a");
+ return;
+ }
+
+ if (unlikely(urb->status != 0)) {
+ dev_dbg(s->dev, "called with status %d\n", urb->status);
+ /* Give up after a number of contiguous errors */
+ if (++s->isoc_errors > MAX_ISOC_ERRORS)
+ dev_dbg(s->dev, "Too many ISOC errors, bailing out\n");
+ goto handler_end;
+ } else {
+ /* Reset ISOC error counter. We did get here, after all. */
+ s->isoc_errors = 0;
+ }
+
+ /* Compact data */
+ for (i = 0; i < urb->number_of_packets; i++) {
+ void *ptr;
+
+ /* Check frame error */
+ fstatus = urb->iso_frame_desc[i].status;
+ if (unlikely(fstatus)) {
+ dev_dbg_ratelimited(s->dev,
+ "frame=%d/%d has error %d skipping\n",
+ i, urb->number_of_packets, fstatus);
+ continue;
+ }
+
+ /* Check if that frame contains data */
+ flen = urb->iso_frame_desc[i].actual_length;
+ if (unlikely(flen == 0))
+ continue;
+
+ iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+
+ /* Get free framebuffer */
+ fbuf = msi2500_get_next_fill_buf(s);
+ if (unlikely(fbuf == NULL)) {
+ s->vb_full++;
+ dev_dbg_ratelimited(s->dev,
+ "videobuf is full, %d packets dropped\n",
+ s->vb_full);
+ continue;
+ }
+
+ /* fill framebuffer */
+ ptr = vb2_plane_vaddr(&fbuf->vb, 0);
+ flen = msi2500_convert_stream(s, ptr, iso_buf, flen);
+ vb2_set_plane_payload(&fbuf->vb, 0, flen);
+ vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
+ }
+
+handler_end:
+ i = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(i != 0))
+ dev_dbg(s->dev, "Error (%d) re-submitting urb\n", i);
+}
+
+static void msi2500_iso_stop(struct msi2500_state *s)
+{
+ int i;
+
+ dev_dbg(s->dev, "\n");
+
+ /* Unlinking ISOC buffers one by one */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (s->urbs[i]) {
+ dev_dbg(s->dev, "Unlinking URB %p\n", s->urbs[i]);
+ usb_kill_urb(s->urbs[i]);
+ }
+ }
+}
+
+static void msi2500_iso_free(struct msi2500_state *s)
+{
+ int i;
+
+ dev_dbg(s->dev, "\n");
+
+ /* Freeing ISOC buffers one by one */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (s->urbs[i]) {
+ dev_dbg(s->dev, "Freeing URB\n");
+ if (s->urbs[i]->transfer_buffer) {
+ usb_free_coherent(s->udev,
+ s->urbs[i]->transfer_buffer_length,
+ s->urbs[i]->transfer_buffer,
+ s->urbs[i]->transfer_dma);
+ }
+ usb_free_urb(s->urbs[i]);
+ s->urbs[i] = NULL;
+ }
+ }
+}
+
+/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
+static void msi2500_isoc_cleanup(struct msi2500_state *s)
+{
+ dev_dbg(s->dev, "\n");
+
+ msi2500_iso_stop(s);
+ msi2500_iso_free(s);
+}
+
+/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
+static int msi2500_isoc_init(struct msi2500_state *s)
+{
+ struct urb *urb;
+ int i, j, ret;
+
+ dev_dbg(s->dev, "\n");
+
+ s->isoc_errors = 0;
+
+ ret = usb_set_interface(s->udev, 0, 1);
+ if (ret)
+ return ret;
+
+ /* Allocate and init Isochronuous urbs */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
+ if (urb == NULL) {
+ dev_err(s->dev, "Failed to allocate urb %d\n", i);
+ msi2500_isoc_cleanup(s);
+ return -ENOMEM;
+ }
+ s->urbs[i] = urb;
+ dev_dbg(s->dev, "Allocated URB at 0x%p\n", urb);
+
+ urb->interval = 1;
+ urb->dev = s->udev;
+ urb->pipe = usb_rcvisocpipe(s->udev, 0x81);
+ urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+ urb->transfer_buffer = usb_alloc_coherent(s->udev,
+ ISO_BUFFER_SIZE,
+ GFP_KERNEL, &urb->transfer_dma);
+ if (urb->transfer_buffer == NULL) {
+ dev_err(s->dev, "Failed to allocate urb buffer %d\n",
+ i);
+ msi2500_isoc_cleanup(s);
+ return -ENOMEM;
+ }
+ urb->transfer_buffer_length = ISO_BUFFER_SIZE;
+ urb->complete = msi2500_isoc_handler;
+ urb->context = s;
+ urb->start_frame = 0;
+ urb->number_of_packets = ISO_FRAMES_PER_DESC;
+ for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
+ urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
+ urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
+ }
+ }
+
+ /* link */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ ret = usb_submit_urb(s->urbs[i], GFP_KERNEL);
+ if (ret) {
+ dev_err(s->dev, "usb_submit_urb %d failed with error %d\n",
+ i, ret);
+ msi2500_isoc_cleanup(s);
+ return ret;
+ }
+ dev_dbg(s->dev, "URB 0x%p submitted.\n", s->urbs[i]);
+ }
+
+ /* All is done... */
+ return 0;
+}
+
+/* Must be called with vb_queue_lock hold */
+static void msi2500_cleanup_queued_bufs(struct msi2500_state *s)
+{
+ unsigned long flags;
+
+ dev_dbg(s->dev, "\n");
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ while (!list_empty(&s->queued_bufs)) {
+ struct msi2500_frame_buf *buf;
+
+ buf = list_entry(s->queued_bufs.next, struct msi2500_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 msi2500_disconnect(struct usb_interface *intf)
+{
+ struct v4l2_device *v = usb_get_intfdata(intf);
+ struct msi2500_state *s =
+ container_of(v, struct msi2500_state, 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);
+ spi_unregister_master(s->master);
+ mutex_unlock(&s->v4l2_lock);
+ mutex_unlock(&s->vb_queue_lock);
+
+ v4l2_device_put(&s->v4l2_dev);
+}
+
+static int msi2500_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct msi2500_state *s = video_drvdata(file);
+
+ dev_dbg(s->dev, "\n");
+
+ 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;
+}
+
+/* Videobuf2 operations */
+static int msi2500_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt, unsigned int *nbuffers,
+ unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct msi2500_state *s = vb2_get_drv_priv(vq);
+
+ dev_dbg(s->dev, "nbuffers=%d\n", *nbuffers);
+
+ /* Absolute min and max number of buffers available for mmap() */
+ *nbuffers = clamp_t(unsigned int, *nbuffers, 8, 32);
+ *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 msi2500_buf_queue(struct vb2_buffer *vb)
+{
+ struct msi2500_state *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct msi2500_frame_buf *buf =
+ container_of(vb, struct msi2500_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);
+}
+
+#define CMD_WREG 0x41
+#define CMD_START_STREAMING 0x43
+#define CMD_STOP_STREAMING 0x45
+#define CMD_READ_UNKNOW 0x48
+
+#define msi2500_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); \
+}
+
+static int msi2500_ctrl_msg(struct msi2500_state *s, u8 cmd, u32 data)
+{
+ int ret;
+ u8 request = cmd;
+ u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR;
+ u16 value = (data >> 0) & 0xffff;
+ u16 index = (data >> 16) & 0xffff;
+
+ msi2500_dbg_usb_control_msg(s->dev,
+ request, requesttype, value, index, NULL, 0);
+ ret = usb_control_msg(s->udev, usb_sndctrlpipe(s->udev, 0),
+ request, requesttype, value, index, NULL, 0, 2000);
+ if (ret)
+ dev_err(s->dev, "failed %d, cmd %02x, data %04x\n",
+ ret, cmd, data);
+
+ return ret;
+}
+
+#define F_REF 24000000
+#define DIV_R_IN 2
+static int msi2500_set_usb_adc(struct msi2500_state *s)
+{
+ int ret, div_n, div_m, div_r_out, f_sr, f_vco, fract;
+ u32 reg3, reg4, reg7;
+ struct v4l2_ctrl *bandwidth_auto;
+ struct v4l2_ctrl *bandwidth;
+
+ f_sr = s->f_adc;
+
+ /* set tuner, subdev, filters according to sampling rate */
+ bandwidth_auto = v4l2_ctrl_find(&s->hdl,
+ V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
+ if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
+ bandwidth = v4l2_ctrl_find(&s->hdl,
+ V4L2_CID_RF_TUNER_BANDWIDTH);
+ v4l2_ctrl_s_ctrl(bandwidth, s->f_adc);
+ }
+
+ /* select stream format */
+ switch (s->pixelformat) {
+ case V4L2_SDR_FMT_CU8:
+ reg7 = 0x000c9407; /* 504 */
+ break;
+ case V4L2_SDR_FMT_CU16LE:
+ reg7 = 0x00009407; /* 252 */
+ break;
+ case V4L2_SDR_FMT_CS8:
+ reg7 = 0x000c9407; /* 504 */
+ break;
+ case MSI2500_PIX_FMT_SDR_MSI2500_384:
+ reg7 = 0x0000a507; /* 384 */
+ break;
+ case MSI2500_PIX_FMT_SDR_S12:
+ reg7 = 0x00008507; /* 336 */
+ break;
+ case V4L2_SDR_FMT_CS14LE:
+ reg7 = 0x00009407; /* 252 */
+ break;
+ default:
+ reg7 = 0x000c9407; /* 504 */
+ break;
+ }
+
+ /*
+ * Synthesizer config is just a educated guess...
+ *
+ * [7:0] 0x03, register address
+ * [8] 1, power control
+ * [9] ?, power control
+ * [12:10] output divider
+ * [13] 0 ?
+ * [14] 0 ?
+ * [15] fractional MSB, bit 20
+ * [16:19] N
+ * [23:20] ?
+ * [24:31] 0x01
+ *
+ * output divider
+ * val div
+ * 0 - (invalid)
+ * 1 4
+ * 2 6
+ * 3 8
+ * 4 10
+ * 5 12
+ * 6 14
+ * 7 16
+ *
+ * VCO 202000000 - 720000000++
+ */
+ reg3 = 0x01000303;
+ reg4 = 0x00000004;
+
+ /* XXX: Filters? AGC? */
+ if (f_sr < 6000000)
+ reg3 |= 0x1 << 20;
+ else if (f_sr < 7000000)
+ reg3 |= 0x5 << 20;
+ else if (f_sr < 8500000)
+ reg3 |= 0x9 << 20;
+ else
+ reg3 |= 0xd << 20;
+
+ for (div_r_out = 4; div_r_out < 16; div_r_out += 2) {
+ f_vco = f_sr * div_r_out * 12;
+ dev_dbg(s->dev, "div_r_out=%d f_vco=%d\n", div_r_out, f_vco);
+ if (f_vco >= 202000000)
+ break;
+ }
+
+ div_n = f_vco / (F_REF * DIV_R_IN);
+ div_m = f_vco % (F_REF * DIV_R_IN);
+ fract = 0x200000ul * div_m / (F_REF * DIV_R_IN);
+
+ reg3 |= div_n << 16;
+ reg3 |= (div_r_out / 2 - 1) << 10;
+ reg3 |= ((fract >> 20) & 0x000001) << 15; /* [20] */
+ reg4 |= ((fract >> 0) & 0x0fffff) << 8; /* [19:0] */
+
+ dev_dbg(s->dev, "f_sr=%d f_vco=%d div_n=%d div_m=%d div_r_out=%d reg3=%08x reg4=%08x\n",
+ f_sr, f_vco, div_n, div_m, div_r_out, reg3, reg4);
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00608008);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00000c05);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00020000);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00480102);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, 0x00f38008);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, reg7);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, reg4);
+ if (ret)
+ goto err;
+
+ ret = msi2500_ctrl_msg(s, CMD_WREG, reg3);
+ if (ret)
+ goto err;
+err:
+ return ret;
+}
+
+static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct msi2500_state *s = vb2_get_drv_priv(vq);
+ int ret;
+
+ dev_dbg(s->dev, "\n");
+
+ if (!s->udev)
+ return -ENODEV;
+
+ if (mutex_lock_interruptible(&s->v4l2_lock))
+ return -ERESTARTSYS;
+
+ /* wake-up tuner */
+ v4l2_subdev_call(s->v4l2_subdev, core, s_power, 1);
+
+ ret = msi2500_set_usb_adc(s);
+
+ ret = msi2500_isoc_init(s);
+ if (ret)
+ msi2500_cleanup_queued_bufs(s);
+
+ ret = msi2500_ctrl_msg(s, CMD_START_STREAMING, 0);
+
+ mutex_unlock(&s->v4l2_lock);
+
+ return ret;
+}
+
+static void msi2500_stop_streaming(struct vb2_queue *vq)
+{
+ struct msi2500_state *s = vb2_get_drv_priv(vq);
+
+ dev_dbg(s->dev, "\n");
+
+ mutex_lock(&s->v4l2_lock);
+
+ if (s->udev)
+ msi2500_isoc_cleanup(s);
+
+ msi2500_cleanup_queued_bufs(s);
+
+ /* according to tests, at least 700us delay is required */
+ msleep(20);
+ if (!msi2500_ctrl_msg(s, CMD_STOP_STREAMING, 0)) {
+ /* sleep USB IF / ADC */
+ msi2500_ctrl_msg(s, CMD_WREG, 0x01000003);
+ }
+
+ /* sleep tuner */
+ v4l2_subdev_call(s->v4l2_subdev, core, s_power, 0);
+
+ mutex_unlock(&s->v4l2_lock);
+}
+
+static struct vb2_ops msi2500_vb2_ops = {
+ .queue_setup = msi2500_queue_setup,
+ .buf_queue = msi2500_buf_queue,
+ .start_streaming = msi2500_start_streaming,
+ .stop_streaming = msi2500_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int msi2500_enum_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct msi2500_state *s = video_drvdata(file);
+
+ dev_dbg(s->dev, "index=%d\n", f->index);
+
+ if (f->index >= s->num_formats)
+ return -EINVAL;
+
+ strlcpy(f->description, formats[f->index].name, sizeof(f->description));
+ f->pixelformat = formats[f->index].pixelformat;
+
+ return 0;
+}
+
+static int msi2500_g_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct msi2500_state *s = video_drvdata(file);
+
+ dev_dbg(s->dev, "pixelformat fourcc %4.4s\n",
+ (char *)&s->pixelformat);
+
+ 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 msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ struct vb2_queue *q = &s->vb_queue;
+ int i;
+
+ dev_dbg(s->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 < s->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 msi2500_try_fmt_sdr_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ int i;
+
+ dev_dbg(s->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 < s->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 msi2500_s_tuner(struct file *file, void *priv,
+ const struct v4l2_tuner *v)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ int ret;
+
+ dev_dbg(s->dev, "index=%d\n", v->index);
+
+ if (v->index == 0)
+ ret = 0;
+ else if (v->index == 1)
+ ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_tuner, v);
+ else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static int msi2500_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ int ret;
+
+ dev_dbg(s->dev, "index=%d\n", v->index);
+
+ if (v->index == 0) {
+ strlcpy(v->name, "Mirics MSi2500", sizeof(v->name));
+ v->type = V4L2_TUNER_ADC;
+ v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
+ v->rangelow = 1200000;
+ v->rangehigh = 15000000;
+ ret = 0;
+ } else if (v->index == 1) {
+ ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_tuner, v);
+ } else {
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int msi2500_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ int ret = 0;
+
+ dev_dbg(s->dev, "tuner=%d type=%d\n", f->tuner, f->type);
+
+ if (f->tuner == 0) {
+ f->frequency = s->f_adc;
+ ret = 0;
+ } else if (f->tuner == 1) {
+ f->type = V4L2_TUNER_RF;
+ ret = v4l2_subdev_call(s->v4l2_subdev, tuner, g_frequency, f);
+ } else {
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int msi2500_s_frequency(struct file *file, void *priv,
+ const struct v4l2_frequency *f)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ int ret;
+
+ dev_dbg(s->dev, "tuner=%d type=%d frequency=%u\n",
+ 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->dev, "ADC frequency=%u Hz\n", s->f_adc);
+ ret = msi2500_set_usb_adc(s);
+ } else if (f->tuner == 1) {
+ ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_frequency, f);
+ } else {
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int msi2500_enum_freq_bands(struct file *file, void *priv,
+ struct v4l2_frequency_band *band)
+{
+ struct msi2500_state *s = video_drvdata(file);
+ int ret;
+
+ dev_dbg(s->dev, "tuner=%d type=%d index=%d\n",
+ 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) {
+ ret = v4l2_subdev_call(s->v4l2_subdev, tuner,
+ enum_freq_bands, band);
+ } else {
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ioctl_ops msi2500_ioctl_ops = {
+ .vidioc_querycap = msi2500_querycap,
+
+ .vidioc_enum_fmt_sdr_cap = msi2500_enum_fmt_sdr_cap,
+ .vidioc_g_fmt_sdr_cap = msi2500_g_fmt_sdr_cap,
+ .vidioc_s_fmt_sdr_cap = msi2500_s_fmt_sdr_cap,
+ .vidioc_try_fmt_sdr_cap = msi2500_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 = msi2500_g_tuner,
+ .vidioc_s_tuner = msi2500_s_tuner,
+
+ .vidioc_g_frequency = msi2500_g_frequency,
+ .vidioc_s_frequency = msi2500_s_frequency,
+ .vidioc_enum_freq_bands = msi2500_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 msi2500_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 msi2500_template = {
+ .name = "Mirics MSi3101 SDR Dongle",
+ .release = video_device_release_empty,
+ .fops = &msi2500_fops,
+ .ioctl_ops = &msi2500_ioctl_ops,
+};
+
+static void msi2500_video_release(struct v4l2_device *v)
+{
+ struct msi2500_state *s =
+ container_of(v, struct msi2500_state, v4l2_dev);
+
+ v4l2_ctrl_handler_free(&s->hdl);
+ v4l2_device_unregister(&s->v4l2_dev);
+ kfree(s);
+}
+
+static int msi2500_transfer_one_message(struct spi_master *master,
+ struct spi_message *m)
+{
+ struct msi2500_state *s = spi_master_get_devdata(master);
+ struct spi_transfer *t;
+ int ret = 0;
+ u32 data;
+
+ list_for_each_entry(t, &m->transfers, transfer_list) {
+ dev_dbg(s->dev, "msg=%*ph\n", t->len, t->tx_buf);
+ data = 0x09; /* reg 9 is SPI adapter */
+ data |= ((u8 *)t->tx_buf)[0] << 8;
+ data |= ((u8 *)t->tx_buf)[1] << 16;
+ data |= ((u8 *)t->tx_buf)[2] << 24;
+ ret = msi2500_ctrl_msg(s, CMD_WREG, data);
+ }
+
+ m->status = ret;
+ spi_finalize_current_message(master);
+ return ret;
+}
+
+static int msi2500_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct msi2500_state *s;
+ struct v4l2_subdev *sd;
+ struct spi_master *master;
+ int ret;
+ static struct spi_board_info board_info = {
+ .modalias = "msi001",
+ .bus_num = 0,
+ .chip_select = 0,
+ .max_speed_hz = 12000000,
+ };
+
+ s = kzalloc(sizeof(struct msi2500_state), 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->pixelformat = formats[0].pixelformat;
+ s->buffersize = formats[0].buffersize;
+ s->num_formats = NUM_FORMATS;
+ if (!msi2500_emulated_fmt)
+ s->num_formats -= 2;
+
+ /* 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 msi2500_frame_buf);
+ s->vb_queue.ops = &msi2500_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 = msi2500_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 = msi2500_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;
+ }
+
+ /* SPI master adapter */
+ master = spi_alloc_master(s->dev, 0);
+ if (master == NULL) {
+ ret = -ENOMEM;
+ goto err_unregister_v4l2_dev;
+ }
+
+ s->master = master;
+ master->bus_num = 0;
+ master->num_chipselect = 1;
+ master->transfer_one_message = msi2500_transfer_one_message;
+ spi_master_set_devdata(master, s);
+ ret = spi_register_master(master);
+ if (ret) {
+ spi_master_put(master);
+ goto err_unregister_v4l2_dev;
+ }
+
+ /* load v4l2 subdevice */
+ sd = v4l2_spi_new_subdev(&s->v4l2_dev, master, &board_info);
+ s->v4l2_subdev = sd;
+ if (sd == NULL) {
+ dev_err(s->dev, "cannot get v4l2 subdevice\n");
+ ret = -ENODEV;
+ goto err_unregister_master;
+ }
+
+ /* Register controls */
+ v4l2_ctrl_handler_init(&s->hdl, 0);
+ if (s->hdl.error) {
+ ret = s->hdl.error;
+ dev_err(s->dev, "Could not initialize controls\n");
+ goto err_free_controls;
+ }
+
+ /* currently all controls are from subdev */
+ v4l2_ctrl_add_handler(&s->hdl, sd->ctrl_handler, NULL);
+
+ 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_master:
+ spi_unregister_master(s->master);
+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 msi2500_id_table[] = {
+ { USB_DEVICE(0x1df7, 0x2500) }, /* Mirics MSi3101 SDR Dongle */
+ { USB_DEVICE(0x2040, 0xd300) }, /* Hauppauge WinTV 133559 LF */
+ { }
+};
+MODULE_DEVICE_TABLE(usb, msi2500_id_table);
+
+/* USB subsystem interface */
+static struct usb_driver msi2500_driver = {
+ .name = KBUILD_MODNAME,
+ .probe = msi2500_probe,
+ .disconnect = msi2500_disconnect,
+ .id_table = msi2500_id_table,
+};
+
+module_usb_driver(msi2500_driver);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff