--- /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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/videodev2.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 <linux/mutex.h>
+#include <media/videobuf2-vmalloc.h>
+
+struct msi3101_gain {
+ u8 tot:7;
+ u8 baseband:6;
+ bool lna:1;
+ bool mixer:1;
+};
+
+/* 60 – 120 MHz band, lna 24dB, mixer 19dB */
+static const struct msi3101_gain msi3101_gain_lut_120[] = {
+ { 0, 0, 0, 0},
+ { 1, 1, 0, 0},
+ { 2, 2, 0, 0},
+ { 3, 3, 0, 0},
+ { 4, 4, 0, 0},
+ { 5, 5, 0, 0},
+ { 6, 6, 0, 0},
+ { 7, 7, 0, 0},
+ { 8, 8, 0, 0},
+ { 9, 9, 0, 0},
+ { 10, 10, 0, 0},
+ { 11, 11, 0, 0},
+ { 12, 12, 0, 0},
+ { 13, 13, 0, 0},
+ { 14, 14, 0, 0},
+ { 15, 15, 0, 0},
+ { 16, 16, 0, 0},
+ { 17, 17, 0, 0},
+ { 18, 18, 0, 0},
+ { 19, 19, 0, 0},
+ { 20, 20, 0, 0},
+ { 21, 21, 0, 0},
+ { 22, 22, 0, 0},
+ { 23, 23, 0, 0},
+ { 24, 24, 0, 0},
+ { 25, 25, 0, 0},
+ { 26, 26, 0, 0},
+ { 27, 27, 0, 0},
+ { 28, 28, 0, 0},
+ { 29, 5, 1, 0},
+ { 30, 6, 1, 0},
+ { 31, 7, 1, 0},
+ { 32, 8, 1, 0},
+ { 33, 9, 1, 0},
+ { 34, 10, 1, 0},
+ { 35, 11, 1, 0},
+ { 36, 12, 1, 0},
+ { 37, 13, 1, 0},
+ { 38, 14, 1, 0},
+ { 39, 15, 1, 0},
+ { 40, 16, 1, 0},
+ { 41, 17, 1, 0},
+ { 42, 18, 1, 0},
+ { 43, 19, 1, 0},
+ { 44, 20, 1, 0},
+ { 45, 21, 1, 0},
+ { 46, 22, 1, 0},
+ { 47, 23, 1, 0},
+ { 48, 24, 1, 0},
+ { 49, 25, 1, 0},
+ { 50, 26, 1, 0},
+ { 51, 27, 1, 0},
+ { 52, 28, 1, 0},
+ { 53, 29, 1, 0},
+ { 54, 30, 1, 0},
+ { 55, 31, 1, 0},
+ { 56, 32, 1, 0},
+ { 57, 33, 1, 0},
+ { 58, 34, 1, 0},
+ { 59, 35, 1, 0},
+ { 60, 36, 1, 0},
+ { 61, 37, 1, 0},
+ { 62, 38, 1, 0},
+ { 63, 39, 1, 0},
+ { 64, 40, 1, 0},
+ { 65, 41, 1, 0},
+ { 66, 42, 1, 0},
+ { 67, 43, 1, 0},
+ { 68, 44, 1, 0},
+ { 69, 45, 1, 0},
+ { 70, 46, 1, 0},
+ { 71, 47, 1, 0},
+ { 72, 48, 1, 0},
+ { 73, 49, 1, 0},
+ { 74, 50, 1, 0},
+ { 75, 51, 1, 0},
+ { 76, 52, 1, 0},
+ { 77, 53, 1, 0},
+ { 78, 54, 1, 0},
+ { 79, 55, 1, 0},
+ { 80, 56, 1, 0},
+ { 81, 57, 1, 0},
+ { 82, 58, 1, 0},
+ { 83, 40, 1, 1},
+ { 84, 41, 1, 1},
+ { 85, 42, 1, 1},
+ { 86, 43, 1, 1},
+ { 87, 44, 1, 1},
+ { 88, 45, 1, 1},
+ { 89, 46, 1, 1},
+ { 90, 47, 1, 1},
+ { 91, 48, 1, 1},
+ { 92, 49, 1, 1},
+ { 93, 50, 1, 1},
+ { 94, 51, 1, 1},
+ { 95, 52, 1, 1},
+ { 96, 53, 1, 1},
+ { 97, 54, 1, 1},
+ { 98, 55, 1, 1},
+ { 99, 56, 1, 1},
+ {100, 57, 1, 1},
+ {101, 58, 1, 1},
+ {102, 59, 1, 1},
+};
+
+/* 120 – 245 MHz band, lna 24dB, mixer 19dB */
+static const struct msi3101_gain msi3101_gain_lut_245[] = {
+ { 0, 0, 0, 0},
+ { 1, 1, 0, 0},
+ { 2, 2, 0, 0},
+ { 3, 3, 0, 0},
+ { 4, 4, 0, 0},
+ { 5, 5, 0, 0},
+ { 6, 6, 0, 0},
+ { 7, 7, 0, 0},
+ { 8, 8, 0, 0},
+ { 9, 9, 0, 0},
+ { 10, 10, 0, 0},
+ { 11, 11, 0, 0},
+ { 12, 12, 0, 0},
+ { 13, 13, 0, 0},
+ { 14, 14, 0, 0},
+ { 15, 15, 0, 0},
+ { 16, 16, 0, 0},
+ { 17, 17, 0, 0},
+ { 18, 18, 0, 0},
+ { 19, 19, 0, 0},
+ { 20, 20, 0, 0},
+ { 21, 21, 0, 0},
+ { 22, 22, 0, 0},
+ { 23, 23, 0, 0},
+ { 24, 24, 0, 0},
+ { 25, 25, 0, 0},
+ { 26, 26, 0, 0},
+ { 27, 27, 0, 0},
+ { 28, 28, 0, 0},
+ { 29, 5, 1, 0},
+ { 30, 6, 1, 0},
+ { 31, 7, 1, 0},
+ { 32, 8, 1, 0},
+ { 33, 9, 1, 0},
+ { 34, 10, 1, 0},
+ { 35, 11, 1, 0},
+ { 36, 12, 1, 0},
+ { 37, 13, 1, 0},
+ { 38, 14, 1, 0},
+ { 39, 15, 1, 0},
+ { 40, 16, 1, 0},
+ { 41, 17, 1, 0},
+ { 42, 18, 1, 0},
+ { 43, 19, 1, 0},
+ { 44, 20, 1, 0},
+ { 45, 21, 1, 0},
+ { 46, 22, 1, 0},
+ { 47, 23, 1, 0},
+ { 48, 24, 1, 0},
+ { 49, 25, 1, 0},
+ { 50, 26, 1, 0},
+ { 51, 27, 1, 0},
+ { 52, 28, 1, 0},
+ { 53, 29, 1, 0},
+ { 54, 30, 1, 0},
+ { 55, 31, 1, 0},
+ { 56, 32, 1, 0},
+ { 57, 33, 1, 0},
+ { 58, 34, 1, 0},
+ { 59, 35, 1, 0},
+ { 60, 36, 1, 0},
+ { 61, 37, 1, 0},
+ { 62, 38, 1, 0},
+ { 63, 39, 1, 0},
+ { 64, 40, 1, 0},
+ { 65, 41, 1, 0},
+ { 66, 42, 1, 0},
+ { 67, 43, 1, 0},
+ { 68, 44, 1, 0},
+ { 69, 45, 1, 0},
+ { 70, 46, 1, 0},
+ { 71, 47, 1, 0},
+ { 72, 48, 1, 0},
+ { 73, 49, 1, 0},
+ { 74, 50, 1, 0},
+ { 75, 51, 1, 0},
+ { 76, 52, 1, 0},
+ { 77, 53, 1, 0},
+ { 78, 54, 1, 0},
+ { 79, 55, 1, 0},
+ { 80, 56, 1, 0},
+ { 81, 57, 1, 0},
+ { 82, 58, 1, 0},
+ { 83, 40, 1, 1},
+ { 84, 41, 1, 1},
+ { 85, 42, 1, 1},
+ { 86, 43, 1, 1},
+ { 87, 44, 1, 1},
+ { 88, 45, 1, 1},
+ { 89, 46, 1, 1},
+ { 90, 47, 1, 1},
+ { 91, 48, 1, 1},
+ { 92, 49, 1, 1},
+ { 93, 50, 1, 1},
+ { 94, 51, 1, 1},
+ { 95, 52, 1, 1},
+ { 96, 53, 1, 1},
+ { 97, 54, 1, 1},
+ { 98, 55, 1, 1},
+ { 99, 56, 1, 1},
+ {100, 57, 1, 1},
+ {101, 58, 1, 1},
+ {102, 59, 1, 1},
+};
+
+/* 420 – 1000 MHz band, lna 7dB, mixer 19dB */
+static const struct msi3101_gain msi3101_gain_lut_1000[] = {
+ { 0, 0, 0, 0},
+ { 1, 1, 0, 0},
+ { 2, 2, 0, 0},
+ { 3, 3, 0, 0},
+ { 4, 4, 0, 0},
+ { 5, 5, 0, 0},
+ { 6, 6, 0, 0},
+ { 7, 7, 0, 0},
+ { 8, 8, 0, 0},
+ { 9, 9, 0, 0},
+ { 10, 10, 0, 0},
+ { 11, 11, 0, 0},
+ { 12, 5, 1, 0},
+ { 13, 6, 1, 0},
+ { 14, 7, 1, 0},
+ { 15, 8, 1, 0},
+ { 16, 9, 1, 0},
+ { 17, 10, 1, 0},
+ { 18, 11, 1, 0},
+ { 19, 12, 1, 0},
+ { 20, 13, 1, 0},
+ { 21, 14, 1, 0},
+ { 22, 15, 1, 0},
+ { 23, 16, 1, 0},
+ { 24, 17, 1, 0},
+ { 25, 18, 1, 0},
+ { 26, 19, 1, 0},
+ { 27, 20, 1, 0},
+ { 28, 21, 1, 0},
+ { 29, 22, 1, 0},
+ { 30, 23, 1, 0},
+ { 31, 24, 1, 0},
+ { 32, 25, 1, 0},
+ { 33, 26, 1, 0},
+ { 34, 27, 1, 0},
+ { 35, 28, 1, 0},
+ { 36, 29, 1, 0},
+ { 37, 30, 1, 0},
+ { 38, 31, 1, 0},
+ { 39, 32, 1, 0},
+ { 40, 33, 1, 0},
+ { 41, 34, 1, 0},
+ { 42, 35, 1, 0},
+ { 43, 36, 1, 0},
+ { 44, 37, 1, 0},
+ { 45, 38, 1, 0},
+ { 46, 39, 1, 0},
+ { 47, 40, 1, 0},
+ { 48, 41, 1, 0},
+ { 49, 42, 1, 0},
+ { 50, 43, 1, 0},
+ { 51, 44, 1, 0},
+ { 52, 45, 1, 0},
+ { 53, 46, 1, 0},
+ { 54, 47, 1, 0},
+ { 55, 48, 1, 0},
+ { 56, 49, 1, 0},
+ { 57, 50, 1, 0},
+ { 58, 51, 1, 0},
+ { 59, 52, 1, 0},
+ { 60, 53, 1, 0},
+ { 61, 54, 1, 0},
+ { 62, 55, 1, 0},
+ { 63, 56, 1, 0},
+ { 64, 57, 1, 0},
+ { 65, 58, 1, 0},
+ { 66, 40, 1, 1},
+ { 67, 41, 1, 1},
+ { 68, 42, 1, 1},
+ { 69, 43, 1, 1},
+ { 70, 44, 1, 1},
+ { 71, 45, 1, 1},
+ { 72, 46, 1, 1},
+ { 73, 47, 1, 1},
+ { 74, 48, 1, 1},
+ { 75, 49, 1, 1},
+ { 76, 50, 1, 1},
+ { 77, 51, 1, 1},
+ { 78, 52, 1, 1},
+ { 79, 53, 1, 1},
+ { 80, 54, 1, 1},
+ { 81, 55, 1, 1},
+ { 82, 56, 1, 1},
+ { 83, 57, 1, 1},
+ { 84, 58, 1, 1},
+ { 85, 59, 1, 1},
+};
+
+/*
+ * 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
+
+#define MSI3101_CID_SAMPLING_RATE ((V4L2_CID_USER_BASE | 0xf000) + 0)
+#define MSI3101_CID_SAMPLING_RESOLUTION ((V4L2_CID_USER_BASE | 0xf000) + 1)
+#define MSI3101_CID_TUNER_RF ((V4L2_CID_USER_BASE | 0xf000) + 10)
+#define MSI3101_CID_TUNER_BW ((V4L2_CID_USER_BASE | 0xf000) + 11)
+#define MSI3101_CID_TUNER_IF ((V4L2_CID_USER_BASE | 0xf000) + 12)
+#define MSI3101_CID_TUNER_GAIN ((V4L2_CID_USER_BASE | 0xf000) + 13)
+
+/* intermediate buffers with raw data from the USB device */
+struct msi3101_frame_buf {
+ struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
+ struct list_head list;
+ void *data; /* raw data from USB device */
+ int filled; /* number of bytes filled to *data */
+};
+
+struct msi3101_state {
+ 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 */
+
+ /* 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 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 ctrl_handler;
+ struct v4l2_ctrl *ctrl_sampling_rate;
+ struct v4l2_ctrl *ctrl_tuner_rf;
+ struct v4l2_ctrl *ctrl_tuner_bw;
+ struct v4l2_ctrl *ctrl_tuner_if;
+ struct v4l2_ctrl *ctrl_tuner_gain;
+
+ u32 symbol_received; /* for track lost packets */
+ u32 symbol; /* for symbol rate calc */
+ unsigned long jiffies;
+};
+
+/* Private functions */
+static struct msi3101_frame_buf *msi3101_get_next_fill_buf(
+ struct msi3101_state *s)
+{
+ unsigned long flags = 0;
+ struct msi3101_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 msi3101_frame_buf, list);
+ list_del(&buf->list);
+leave:
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+ return buf;
+}
+
+/*
+ * Converts signed 10-bit integer into 32-bit IEEE floating point
+ * representation.
+ * Will be exact from 0 to 2^24. Above that, we round towards zero
+ * as the fractional bits will not fit in a float. (It would be better to
+ * round towards even as the fpu does, but that is slower.)
+ */
+#define I2F_FRAC_BITS 23
+#define I2F_MASK ((1 << I2F_FRAC_BITS) - 1)
+static uint32_t msi3101_int2float(uint32_t x)
+{
+ uint32_t msb, exponent, fraction, sign;
+
+ /* Zero is special */
+ if (!x)
+ return 0;
+
+ /* Negative / positive value */
+ if (x & 0x200) {
+ x = -x;
+ x &= 0x3ff;
+ sign = 1 << 31;
+ } else {
+ sign = 0 << 31;
+ }
+
+ /* Get location of the most significant bit */
+ msb = __fls(x);
+
+ /*
+ * Use a rotate instead of a shift because that works both leftwards
+ * and rightwards due to the mod(32) behaviour. This means we don't
+ * need to check to see if we are above 2^24 or not.
+ */
+ fraction = ror32(x, (msb - I2F_FRAC_BITS) & 0x1f) & I2F_MASK;
+ exponent = (127 + msb) << I2F_FRAC_BITS;
+
+ return (fraction + exponent) | sign;
+}
+
+#define MSI3101_CONVERT_IN_URB_HANDLER
+#define MSI3101_EXTENSIVE_DEBUG
+static int msi3101_convert_stream(struct msi3101_state *s, u32 *dst,
+ const u8 *src, unsigned int src_len)
+{
+ int i, j, k, l, i_max, dst_len = 0;
+ u16 sample[4];
+#ifdef MSI3101_EXTENSIVE_DEBUG
+ u32 symbol[3];
+#endif
+ /* There could be 1-3 1024 bytes URB frames */
+ i_max = src_len / 1024;
+ for (i = 0; i < i_max; i++) {
+#ifdef MSI3101_EXTENSIVE_DEBUG
+ symbol[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
+ if (i == 0 && s->symbol_received != symbol[0]) {
+ dev_dbg(&s->udev->dev,
+ "%d symbols lost, %d %08x:%08x\n",
+ symbol[0] - s->symbol_received,
+ src_len, s->symbol_received, symbol[0]);
+ }
+#endif
+ src += 16;
+ for (j = 0; j < 6; j++) {
+ for (k = 0; k < 16; k++) {
+ for (l = 0; l < 10; l += 5) {
+ sample[0] = (src[l + 0] & 0xff) >> 0 | (src[l + 1] & 0x03) << 8;
+ sample[1] = (src[l + 1] & 0xfc) >> 2 | (src[l + 2] & 0x0f) << 6;
+ sample[2] = (src[l + 2] & 0xf0) >> 4 | (src[l + 3] & 0x3f) << 4;
+ sample[3] = (src[l + 3] & 0xc0) >> 6 | (src[l + 4] & 0xff) << 2;
+
+ *dst++ = msi3101_int2float(sample[0]);
+ *dst++ = msi3101_int2float(sample[1]);
+ *dst++ = msi3101_int2float(sample[2]);
+ *dst++ = msi3101_int2float(sample[3]);
+
+ /* 4 x 32bit float samples */
+ dst_len += 4 * 4;
+ }
+ src += 10;
+ }
+#ifdef MSI3101_EXTENSIVE_DEBUG
+ if (memcmp(src, "\xff\xff\xff\xff", 4) && memcmp(src, "\x00\x00\x00\x00", 4))
+ dev_dbg_ratelimited(&s->udev->dev,
+ "padding %*ph\n", 4, src);
+#endif
+ src += 4;
+ }
+ src += 24;
+ }
+
+#ifdef MSI3101_EXTENSIVE_DEBUG
+ /* calculate symbol rate and output it in 10 seconds intervals */
+ if ((s->jiffies + msecs_to_jiffies(10000)) <= jiffies) {
+ unsigned long jiffies_now = jiffies;
+ unsigned long msecs = jiffies_to_msecs(jiffies_now) - jiffies_to_msecs(s->jiffies);
+ unsigned int symbols = symbol[i_max - 1] - s->symbol;
+ s->jiffies = jiffies_now;
+ s->symbol = symbol[i_max - 1];
+ dev_dbg(&s->udev->dev,
+ "slen=%d symbols=%u msecs=%lu symbolrate=%lu\n",
+ src_len, symbols, msecs,
+ symbols * 1000UL / msecs);
+ }
+
+ /* last received symbol (symbol = symbol + i * 384) */
+ s->symbol_received = symbol[i_max - 1] + 384;
+#endif
+ 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 msi3101_isoc_handler(struct urb *urb)
+{
+ struct msi3101_state *s = (struct msi3101_state *)urb->context;
+ int i, flen, fstatus;
+ unsigned char *iso_buf = NULL;
+ struct msi3101_frame_buf *fbuf;
+
+ if (urb->status == -ENOENT || urb->status == -ECONNRESET ||
+ urb->status == -ESHUTDOWN) {
+ dev_dbg(&s->udev->dev, "URB (%p) unlinked %ssynchronuously\n",
+ urb, urb->status == -ENOENT ? "" : "a");
+ return;
+ }
+
+ if (urb->status != 0) {
+ dev_dbg(&s->udev->dev,
+ "msi3101_isoc_handler() 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->udev->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++) {
+ /* Check frame error */
+ fstatus = urb->iso_frame_desc[i].status;
+ if (fstatus) {
+ dev_dbg(&s->udev->dev,
+ "frame=%d/%d has error %d skipping\n",
+ i, urb->number_of_packets, fstatus);
+ goto skip;
+ }
+
+ /* Check if that frame contains data */
+ flen = urb->iso_frame_desc[i].actual_length;
+ if (flen == 0)
+ goto skip;
+
+ iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+
+ /* Get free framebuffer */
+ fbuf = msi3101_get_next_fill_buf(s);
+ if (fbuf == NULL) {
+ s->vb_full++;
+ dev_dbg_ratelimited(&s->udev->dev,
+ "videobuf is full, %d packets dropped\n",
+ s->vb_full);
+ goto skip;
+ }
+
+ /* fill framebuffer */
+#ifdef MSI3101_CONVERT_IN_URB_HANDLER
+ vb2_set_plane_payload(&fbuf->vb, 0,
+ msi3101_convert_stream(s,
+ vb2_plane_vaddr(&fbuf->vb, 0), iso_buf, flen));
+#else
+ memcpy(fbuf->data, iso_buf, flen);
+ fbuf->filled = flen;
+#endif
+ vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
+skip:
+ ;
+ }
+
+handler_end:
+ i = usb_submit_urb(urb, GFP_ATOMIC);
+ if (i != 0)
+ dev_dbg(&s->udev->dev,
+ "Error (%d) re-submitting urb in msi3101_isoc_handler\n",
+ i);
+}
+
+static void msi3101_iso_stop(struct msi3101_state *s)
+{
+ int i;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ /* Unlinking ISOC buffers one by one */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (s->urbs[i]) {
+ dev_dbg(&s->udev->dev, "Unlinking URB %p\n",
+ s->urbs[i]);
+ usb_kill_urb(s->urbs[i]);
+ }
+ }
+}
+
+static void msi3101_iso_free(struct msi3101_state *s)
+{
+ int i;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ /* Freeing ISOC buffers one by one */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (s->urbs[i]) {
+ dev_dbg(&s->udev->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 msi3101_isoc_cleanup(struct msi3101_state *s)
+{
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ msi3101_iso_stop(s);
+ msi3101_iso_free(s);
+}
+
+/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
+static int msi3101_isoc_init(struct msi3101_state *s)
+{
+ struct usb_device *udev;
+ struct urb *urb;
+ int i, j, ret;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ s->isoc_errors = 0;
+ udev = s->udev;
+
+ ret = usb_set_interface(s->udev, 0, 1);
+ if (ret < 0)
+ 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->udev->dev,
+ "Failed to allocate urb %d\n", i);
+ msi3101_isoc_cleanup(s);
+ return -ENOMEM;
+ }
+ s->urbs[i] = urb;
+ dev_dbg(&s->udev->dev, "Allocated URB at 0x%p\n", urb);
+
+ urb->interval = 1;
+ urb->dev = udev;
+ urb->pipe = usb_rcvisocpipe(udev, 0x81);
+ urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+ urb->transfer_buffer = usb_alloc_coherent(udev, ISO_BUFFER_SIZE,
+ GFP_KERNEL, &urb->transfer_dma);
+ if (urb->transfer_buffer == NULL) {
+ dev_err(&s->udev->dev,
+ "Failed to allocate urb buffer %d\n",
+ i);
+ msi3101_isoc_cleanup(s);
+ return -ENOMEM;
+ }
+ urb->transfer_buffer_length = ISO_BUFFER_SIZE;
+ urb->complete = msi3101_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->udev->dev,
+ "isoc_init() submit_urb %d failed with error %d\n",
+ i, ret);
+ msi3101_isoc_cleanup(s);
+ return ret;
+ }
+ dev_dbg(&s->udev->dev, "URB 0x%p submitted.\n", s->urbs[i]);
+ }
+
+ /* All is done... */
+ return 0;
+}
+
+/* Must be called with vb_queue_lock hold */
+static void msi3101_cleanup_queued_bufs(struct msi3101_state *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 msi3101_frame_buf *buf;
+
+ buf = list_entry(s->queued_bufs.next, struct msi3101_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 msi3101_disconnect(struct usb_interface *intf)
+{
+ struct v4l2_device *v = usb_get_intfdata(intf);
+ struct msi3101_state *s =
+ container_of(v, struct msi3101_state, 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);
+}
+
+static int msi3101_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct msi3101_state *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_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+ cap->device_caps = V4L2_CAP_TUNER;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+
+/* Videobuf2 operations */
+static int msi3101_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt, unsigned int *nbuffers,
+ unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vq);
+ dev_dbg(&s->udev->dev, "%s: *nbuffers=%d\n", __func__, *nbuffers);
+
+ /* Absolute min and max number of buffers available for mmap() */
+ *nbuffers = 32;
+ *nplanes = 1;
+ sizes[0] = PAGE_ALIGN(3 * 3072); /* 3 * 768 * 4 */
+ dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
+ __func__, *nbuffers, sizes[0]);
+ return 0;
+}
+
+static int msi3101_buf_init(struct vb2_buffer *vb)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct msi3101_frame_buf *fbuf =
+ container_of(vb, struct msi3101_frame_buf, vb);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ fbuf->data = vzalloc(ISO_MAX_FRAME_SIZE);
+ if (fbuf->data == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int msi3101_buf_prepare(struct vb2_buffer *vb)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue);
+
+ /* Don't allow queing new buffers after device disconnection */
+ if (!s->udev)
+ return -ENODEV;
+
+ return 0;
+}
+
+/*
+ * +===========================================================================
+ * | 00-1024 | USB packet
+ * +===========================================================================
+ * | 00- 03 | packet address
+ * +---------------------------------------------------------------------------
+ * | 04- 15 | garbage
+ * +---------------------------------------------------------------------------
+ * | 16- 175 | samples
+ * +---------------------------------------------------------------------------
+ * | 176- 179 | padding
+ * +---------------------------------------------------------------------------
+ * | 180- 339 | samples
+ * +---------------------------------------------------------------------------
+ * | 340- 343 | padding
+ * +---------------------------------------------------------------------------
+ * | 344- 503 | samples
+ * +---------------------------------------------------------------------------
+ * | 504- 507 | padding
+ * +---------------------------------------------------------------------------
+ * | 508- 667 | samples
+ * +---------------------------------------------------------------------------
+ * | 668- 671 | padding
+ * +---------------------------------------------------------------------------
+ * | 672- 831 | samples
+ * +---------------------------------------------------------------------------
+ * | 832- 835 | padding
+ * +---------------------------------------------------------------------------
+ * | 836- 995 | samples
+ * +---------------------------------------------------------------------------
+ * | 996- 999 | padding
+ * +---------------------------------------------------------------------------
+ * | 1000-1024 | garbage
+ * +---------------------------------------------------------------------------
+ *
+ * bytes 4 - 7 could have some meaning?
+ * padding is "00 00 00 00" or "ff ff ff ff"
+ * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes
+ */
+#ifdef MSI3101_CONVERT_IN_URB_HANDLER
+static int msi3101_buf_finish(struct vb2_buffer *vb)
+{
+ return 0;
+}
+#else
+static int msi3101_buf_finish(struct vb2_buffer *vb)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct msi3101_frame_buf *fbuf =
+ container_of(vb, struct msi3101_frame_buf, vb);
+ int ret;
+ u32 *dst = vb2_plane_vaddr(&fbuf->vb, 0);
+ ret = msi3101_convert_stream(s, dst, fbuf->data, fbuf->filled);
+ vb2_set_plane_payload(&fbuf->vb, 0, ret);
+ return 0;
+}
+#endif
+
+static void msi3101_buf_cleanup(struct vb2_buffer *vb)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct msi3101_frame_buf *buf =
+ container_of(vb, struct msi3101_frame_buf, vb);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ vfree(buf->data);
+}
+static void msi3101_buf_queue(struct vb2_buffer *vb)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct msi3101_frame_buf *buf =
+ container_of(vb, struct msi3101_frame_buf, vb);
+ unsigned long flags = 0;
+
+ /* Check the device has not disconnected between prep and queuing */
+ if (!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 msi3101_dbg_usb_control_msg(udev, r, t, v, _i, b, l) { \
+ char *direction; \
+ if (t == (USB_TYPE_VENDOR | USB_DIR_OUT)) \
+ 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); \
+}
+
+static int msi3101_ctrl_msg(struct msi3101_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;
+
+ msi3101_dbg_usb_control_msg(s->udev,
+ request, requesttype, value, index, NULL, 0);
+
+ ret = usb_control_msg(s->udev, usb_rcvctrlpipe(s->udev, 0),
+ request, requesttype, value, index, NULL, 0, 2000);
+
+ if (ret)
+ dev_err(&s->udev->dev, "%s: failed %d, cmd %02x, data %04x\n",
+ __func__, ret, cmd, data);
+
+ return ret;
+};
+
+static int msi3101_tuner_write(struct msi3101_state *s, u32 data)
+{
+ return msi3101_ctrl_msg(s, CMD_WREG, data << 8 | 0x09);
+};
+
+#define F_REF 24000000
+static int msi3101_set_usb_adc(struct msi3101_state *s)
+{
+ int ret, div_n, div_m, div_r_out, f_sr;
+ u32 reg4, reg3;
+ /*
+ * FIXME: Synthesizer config is just a educated guess...
+ * It seems to give reasonable values when N is 5-12 and output
+ * divider R is 2, which means sampling rates 5-12 Msps in practise.
+ *
+ * reg 3 ADC synthesizer config
+ * [7:0] 0x03, register address
+ * [8] 1, always
+ * [9] ?
+ * [12:10] output divider
+ * [13] 0 ?
+ * [14] 0 ?
+ * [15] increase sr by max fract
+ * [16:19] N
+ * [23:20] ?
+ * [24:31] 0x01
+ *
+ * output divider
+ * val div
+ * 0 - (invalid)
+ * 1 2
+ * 2 3
+ * 3 4
+ * 4 5
+ * 5 6
+ * 6 7
+ * 7 8
+ */
+
+ f_sr = s->ctrl_sampling_rate->val64;
+ reg3 = 0x01c00303;
+
+ for (div_n = 12; div_n > 5; div_n--) {
+ if (f_sr >= div_n * 1000000)
+ break;
+ }
+
+ reg3 |= div_n << 16;
+
+ for (div_r_out = 2; div_r_out < 8; div_r_out++) {
+ if (f_sr >= div_n * F_REF / div_r_out / 12)
+ break;
+ }
+
+ reg3 |= (div_r_out - 1) << 10;
+ div_m = f_sr % (div_n * F_REF / div_r_out / 12);
+
+ if (div_m >= 500000) {
+ reg3 |= 1 << 15;
+ div_m -= 500000;
+ }
+
+ reg4 = ((div_m * 0x0ffffful / 500000) << 8) | 0x04;
+
+ dev_dbg(&s->udev->dev, "%s: sr=%d n=%d m=%d r_out=%d reg4=%08x\n",
+ __func__, f_sr, div_n, div_m, div_r_out, reg4);
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00608008);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00000c05);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00020000);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00480102);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00f38008);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, 0x0000a507);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, reg4);
+ if (ret)
+ goto err;
+
+ ret = msi3101_ctrl_msg(s, CMD_WREG, reg3);
+ if (ret)
+ goto err;
+err:
+ return ret;
+};
+
+static int msi3101_set_tuner(struct msi3101_state *s)
+{
+ int i, ret, len;
+ u32 reg, synthstep, thresh, n, frac;
+ u64 fsynth;
+ u8 mode, lo_div;
+ const struct msi3101_gain *gain_lut;
+ static const struct {
+ u32 rf;
+ u8 mode;
+ u8 lo_div;
+ } band_lut[] = {
+ { 30000000, 0x01, 16}, /* AM_MODE1 */
+ {108000000, 0x02, 32}, /* VHF_MODE */
+ {240000000, 0x04, 16}, /* B3_MODE */
+ {960000000, 0x08, 4}, /* B45_MODE */
+ {167500000, 0x10, 2}, /* BL_MODE */
+ };
+ static const struct {
+ u32 freq;
+ u8 val;
+ } if_freq_lut[] = {
+ { 0, 0x03}, /* Zero IF */
+ { 450000, 0x02}, /* 450 kHz IF */
+ {1620000, 0x01}, /* 1.62 MHz IF */
+ {2048000, 0x00}, /* 2.048 MHz IF */
+ };
+ static const struct {
+ u32 freq;
+ u8 val;
+ } bandwidth_lut[] = {
+ { 200000, 0x00}, /* 200 kHz */
+ { 300000, 0x01}, /* 300 kHz */
+ { 600000, 0x02}, /* 600 kHz */
+ {1536000, 0x03}, /* 1.536 MHz */
+ {5000000, 0x04}, /* 5 MHz */
+ {6000000, 0x05}, /* 6 MHz */
+ {7000000, 0x06}, /* 7 MHz */
+ {8000000, 0x07}, /* 8 MHz */
+ };
+
+ unsigned int rf_freq = s->ctrl_tuner_rf->val64;
+
+ /*
+ * bandwidth (Hz)
+ * 200000, 300000, 600000, 1536000, 5000000, 6000000, 7000000, 8000000
+ */
+ int bandwidth = s->ctrl_tuner_bw->val;
+
+ /*
+ * intermediate frequency (Hz)
+ * 0, 450000, 1620000, 2048000
+ */
+ int if_freq = s->ctrl_tuner_if->val;
+
+ /*
+ * gain reduction (dB)
+ * 0 - 102 below 420 MHz
+ * 0 - 85 above 420 MHz
+ */
+ int gain = s->ctrl_tuner_gain->val;
+
+ dev_dbg(&s->udev->dev,
+ "%s: rf_freq=%d bandwidth=%d if_freq=%d gain=%d\n",
+ __func__, rf_freq, bandwidth, if_freq, gain);
+
+ ret = -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(band_lut); i++) {
+ if (rf_freq <= band_lut[i].rf) {
+ mode = band_lut[i].mode;
+ lo_div = band_lut[i].lo_div;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(band_lut))
+ goto err;
+
+ for (i = 0; i < ARRAY_SIZE(if_freq_lut); i++) {
+ if (if_freq == if_freq_lut[i].freq) {
+ if_freq = if_freq_lut[i].val;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(if_freq_lut))
+ goto err;
+
+ for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) {
+ if (bandwidth == bandwidth_lut[i].freq) {
+ bandwidth = bandwidth_lut[i].val;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(bandwidth_lut))
+ goto err;
+
+ #define FSTEP 10000
+ #define FREF1 24000000
+ fsynth = (rf_freq + 0) * lo_div;
+ synthstep = FSTEP * lo_div;
+ thresh = (FREF1 * 4) / synthstep;
+ n = fsynth / (FREF1 * 4);
+ frac = thresh * (fsynth % (FREF1 * 4)) / (FREF1 * 4);
+
+ if (thresh > 4095 || n > 63 || frac > 4095) {
+ dev_dbg(&s->udev->dev,
+ "%s: synth setup failed rf=%d thresh=%d n=%d frac=%d\n",
+ __func__, rf_freq, thresh, n, frac);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = msi3101_tuner_write(s, 0x00000e);
+ ret = msi3101_tuner_write(s, 0x000003);
+
+ reg = 0 << 0;
+ reg |= mode << 4;
+ reg |= 1 << 10;
+ reg |= if_freq << 12;
+ reg |= bandwidth << 14;
+ reg |= 0x02 << 17;
+ reg |= 0x00 << 20;
+ ret = msi3101_tuner_write(s, reg);
+ if (ret)
+ goto err;
+
+ reg = 5 << 0;
+ reg |= thresh << 4;
+ reg |= 1 << 19;
+ reg |= 1 << 21;
+ ret = msi3101_tuner_write(s, reg);
+ if (ret)
+ goto err;
+
+ reg = 2 << 0;
+ reg |= frac << 4;
+ reg |= n << 16;
+ ret = msi3101_tuner_write(s, reg);
+ if (ret)
+ goto err;
+
+ if (rf_freq < 120000000) {
+ gain_lut = msi3101_gain_lut_120;
+ len = ARRAY_SIZE(msi3101_gain_lut_120);
+ } else if (rf_freq < 245000000) {
+ gain_lut = msi3101_gain_lut_245;
+ len = ARRAY_SIZE(msi3101_gain_lut_120);
+ } else {
+ gain_lut = msi3101_gain_lut_1000;
+ len = ARRAY_SIZE(msi3101_gain_lut_1000);
+ }
+
+ for (i = 0; i < len; i++) {
+ if (gain_lut[i].tot >= gain)
+ break;
+ }
+
+ if (i == len)
+ goto err;
+
+ dev_dbg(&s->udev->dev,
+ "%s: gain tot=%d baseband=%d lna=%d mixer=%d\n",
+ __func__, gain_lut[i].tot, gain_lut[i].baseband,
+ gain_lut[i].lna, gain_lut[i].mixer);
+
+ reg = 1 << 0;
+ reg |= gain_lut[i].baseband << 4;
+ reg |= 0 << 10;
+ reg |= gain_lut[i].mixer << 12;
+ reg |= gain_lut[i].lna << 13;
+ reg |= 4 << 14;
+ reg |= 0 << 17;
+ ret = msi3101_tuner_write(s, reg);
+ if (ret)
+ goto err;
+
+ reg = 6 << 0;
+ reg |= 63 << 4;
+ reg |= 4095 << 10;
+ ret = msi3101_tuner_write(s, reg);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_dbg(&s->udev->dev, "%s: failed %d\n", __func__, ret);
+ return ret;
+};
+
+static int msi3101_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vq);
+ int ret;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (!s->udev)
+ return -ENODEV;
+
+ if (mutex_lock_interruptible(&s->v4l2_lock))
+ return -ERESTARTSYS;
+
+ ret = msi3101_set_usb_adc(s);
+
+ ret = msi3101_isoc_init(s);
+ if (ret)
+ msi3101_cleanup_queued_bufs(s);
+
+ ret = msi3101_ctrl_msg(s, CMD_START_STREAMING, 0);
+
+ mutex_unlock(&s->v4l2_lock);
+
+ return ret;
+}
+
+static int msi3101_stop_streaming(struct vb2_queue *vq)
+{
+ struct msi3101_state *s = vb2_get_drv_priv(vq);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (mutex_lock_interruptible(&s->v4l2_lock))
+ return -ERESTARTSYS;
+
+ msi3101_ctrl_msg(s, CMD_STOP_STREAMING, 0);
+
+ if (s->udev)
+ msi3101_isoc_cleanup(s);
+
+ msi3101_cleanup_queued_bufs(s);
+ mutex_unlock(&s->v4l2_lock);
+
+ return 0;
+}
+
+static struct vb2_ops msi3101_vb2_ops = {
+ .queue_setup = msi3101_queue_setup,
+ .buf_init = msi3101_buf_init,
+ .buf_prepare = msi3101_buf_prepare,
+ .buf_finish = msi3101_buf_finish,
+ .buf_cleanup = msi3101_buf_cleanup,
+ .buf_queue = msi3101_buf_queue,
+ .start_streaming = msi3101_start_streaming,
+ .stop_streaming = msi3101_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int msi3101_enum_input(struct file *file, void *fh, struct v4l2_input *i)
+{
+ if (i->index != 0)
+ return -EINVAL;
+
+ strlcpy(i->name, "SDR data", sizeof(i->name));
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int msi3101_g_input(struct file *file, void *fh, unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+static int msi3101_s_input(struct file *file, void *fh, unsigned int i)
+{
+ return i ? -EINVAL : 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ const struct v4l2_tuner *v)
+{
+ struct msi3101_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
+{
+ struct msi3101_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ strcpy(v->name, "SDR RX");
+ v->capability = V4L2_TUNER_CAP_LOW;
+
+ return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ const struct v4l2_frequency *f)
+{
+ struct msi3101_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s: frequency=%u Hz (%d)\n",
+ __func__, f->frequency * 625U / 10U, f->frequency);
+
+ return v4l2_ctrl_s_ctrl_int64(s->ctrl_tuner_rf,
+ f->frequency * 625U / 10U);
+}
+
+const struct v4l2_ioctl_ops msi3101_ioctl_ops = {
+ .vidioc_querycap = msi3101_querycap,
+
+ .vidioc_enum_input = msi3101_enum_input,
+ .vidioc_g_input = msi3101_g_input,
+ .vidioc_s_input = msi3101_s_input,
+
+ .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 = vidioc_g_tuner,
+ .vidioc_s_tuner = vidioc_s_tuner,
+ .vidioc_s_frequency = vidioc_s_frequency,
+
+ .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 msi3101_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 msi3101_template = {
+ .name = "Mirics MSi3101 SDR Dongle",
+ .release = video_device_release_empty,
+ .fops = &msi3101_fops,
+ .ioctl_ops = &msi3101_ioctl_ops,
+};
+
+static int msi3101_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct msi3101_state *s =
+ container_of(ctrl->handler, struct msi3101_state,
+ ctrl_handler);
+ int ret;
+ dev_dbg(&s->udev->dev,
+ "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
+ __func__, ctrl->id, ctrl->name, ctrl->val,
+ ctrl->minimum, ctrl->maximum, ctrl->step);
+
+ switch (ctrl->id) {
+ case MSI3101_CID_SAMPLING_RATE:
+ case MSI3101_CID_SAMPLING_RESOLUTION:
+ ret = 0;
+ break;
+ case MSI3101_CID_TUNER_RF:
+ case MSI3101_CID_TUNER_BW:
+ case MSI3101_CID_TUNER_IF:
+ case MSI3101_CID_TUNER_GAIN:
+ ret = msi3101_set_tuner(s);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops msi3101_ctrl_ops = {
+ .s_ctrl = msi3101_s_ctrl,
+};
+
+static void msi3101_video_release(struct v4l2_device *v)
+{
+ struct msi3101_state *s =
+ container_of(v, struct msi3101_state, v4l2_dev);
+
+ v4l2_ctrl_handler_free(&s->ctrl_handler);
+ v4l2_device_unregister(&s->v4l2_dev);
+ kfree(s);
+}
+
+static int msi3101_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct msi3101_state *s = NULL;
+ int ret;
+ static const struct v4l2_ctrl_config ctrl_sampling_rate = {
+ .ops = &msi3101_ctrl_ops,
+ .id = MSI3101_CID_SAMPLING_RATE,
+ .type = V4L2_CTRL_TYPE_INTEGER64,
+ .name = "Sampling Rate",
+ .min = 500000,
+ .max = 12000000,
+ .def = 2048000,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_sampling_resolution = {
+ .ops = &msi3101_ctrl_ops,
+ .id = MSI3101_CID_SAMPLING_RESOLUTION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .flags = V4L2_CTRL_FLAG_INACTIVE,
+ .name = "Sampling Resolution",
+ .min = 10,
+ .max = 10,
+ .def = 10,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_rf = {
+ .ops = &msi3101_ctrl_ops,
+ .id = MSI3101_CID_TUNER_RF,
+ .type = V4L2_CTRL_TYPE_INTEGER64,
+ .name = "Tuner RF",
+ .min = 40000000,
+ .max = 2000000000,
+ .def = 100000000,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_bw = {
+ .ops = &msi3101_ctrl_ops,
+ .id = MSI3101_CID_TUNER_BW,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Tuner BW",
+ .min = 200000,
+ .max = 8000000,
+ .def = 600000,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_if = {
+ .ops = &msi3101_ctrl_ops,
+ .id = MSI3101_CID_TUNER_IF,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .flags = V4L2_CTRL_FLAG_INACTIVE,
+ .name = "Tuner IF",
+ .min = 0,
+ .max = 2048000,
+ .def = 0,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_gain = {
+ .ops = &msi3101_ctrl_ops,
+ .id = MSI3101_CID_TUNER_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Tuner Gain",
+ .min = 0,
+ .max = 102,
+ .def = 0,
+ .step = 1,
+ };
+
+ s = kzalloc(sizeof(struct msi3101_state), GFP_KERNEL);
+ if (s == NULL) {
+ pr_err("Could not allocate memory for msi3101_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;
+
+ /* Init videobuf2 queue structure */
+ s->vb_queue.type = V4L2_BUF_TYPE_VIDEO_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 msi3101_frame_buf);
+ s->vb_queue.ops = &msi3101_vb2_ops;
+ s->vb_queue.mem_ops = &vb2_vmalloc_memops;
+ s->vb_queue.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ ret = vb2_queue_init(&s->vb_queue);
+ if (ret < 0) {
+ dev_err(&s->udev->dev, "Could not initialize vb2 queue\n");
+ goto err_free_mem;
+ }
+
+ /* Init video_device structure */
+ s->vdev = msi3101_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 controls */
+ v4l2_ctrl_handler_init(&s->ctrl_handler, 6);
+ s->ctrl_sampling_rate = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_sampling_rate, NULL);
+ v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_sampling_resolution, NULL);
+ s->ctrl_tuner_rf = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_rf, NULL);
+ s->ctrl_tuner_bw = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_bw, NULL);
+ s->ctrl_tuner_if = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_if, NULL);
+ s->ctrl_tuner_gain = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_gain, NULL);
+ if (s->ctrl_handler.error) {
+ ret = s->ctrl_handler.error;
+ dev_err(&s->udev->dev, "Could not initialize controls\n");
+ goto err_free_controls;
+ }
+
+ /* Register the v4l2_device structure */
+ s->v4l2_dev.release = msi3101_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_controls;
+ }
+
+ s->v4l2_dev.ctrl_handler = &s->ctrl_handler;
+ s->vdev.v4l2_dev = &s->v4l2_dev;
+ s->vdev.lock = &s->v4l2_lock;
+
+ ret = video_register_device(&s->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ 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_unregister_v4l2_dev:
+ v4l2_device_unregister(&s->v4l2_dev);
+err_free_controls:
+ v4l2_ctrl_handler_free(&s->ctrl_handler);
+err_free_mem:
+ kfree(s);
+ return ret;
+}
+
+/* USB device ID list */
+static struct usb_device_id msi3101_id_table[] = {
+ { USB_DEVICE(0x1df7, 0x2500) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, msi3101_id_table);
+
+/* USB subsystem interface */
+static struct usb_driver msi3101_driver = {
+ .name = KBUILD_MODNAME,
+ .probe = msi3101_probe,
+ .disconnect = msi3101_disconnect,
+ .id_table = msi3101_id_table,
+};
+
+module_usb_driver(msi3101_driver);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle");
+MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / commitdiff