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alistair23-linux/drivers/staging/media/msi3101/sdr-msi3101.c
Hans Verkuil e37559b22c [media] vb2: stop_streaming should return void 
The vb2 core ignores any return code from the stop_streaming op.
And there really isn't anything it can do anyway in case of an error.
So change the return type to void and update any drivers that implement it.

The int return gave drivers the idea that this operation could actually
fail, but that's really not the case.

The pwc amd sdr-msi3101 drivers both had this construction:

        if (mutex_lock_interruptible(&s->v4l2_lock))
                return -ERESTARTSYS;

This has been updated to just call mutex_lock(). The stop_streaming op
expects this to really stop streaming and I very much doubt this will
work reliably if stop_streaming just returns without really stopping the
DMA.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-04-23 10:12:51 -03:00

1519 lines
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/*
* 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>
/*
* 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 should be moved to V4L2 API */
#define V4L2_PIX_FMT_SDR_S8 v4l2_fourcc('D', 'S', '0', '8') /* signed 8-bit */
#define V4L2_PIX_FMT_SDR_S12 v4l2_fourcc('D', 'S', '1', '2') /* signed 12-bit */
#define V4L2_PIX_FMT_SDR_S14 v4l2_fourcc('D', 'S', '1', '4') /* signed 14-bit */
#define V4L2_PIX_FMT_SDR_MSI2500_384 v4l2_fourcc('M', '3', '8', '4') /* Mirics MSi2500 format 384 */
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 msi3101_format {
char *name;
u32 pixelformat;
};
/* format descriptions for capture and preview */
static struct msi3101_format formats[] = {
{
.name = "IQ U8",
.pixelformat = V4L2_SDR_FMT_CU8,
}, {
.name = "IQ U16LE",
.pixelformat = V4L2_SDR_FMT_CU16LE,
#if 0
}, {
.name = "8-bit signed",
.pixelformat = V4L2_PIX_FMT_SDR_S8,
}, {
.name = "10+2-bit signed",
.pixelformat = V4L2_PIX_FMT_SDR_MSI2500_384,
}, {
.name = "12-bit signed",
.pixelformat = V4L2_PIX_FMT_SDR_S12,
}, {
.name = "14-bit signed",
.pixelformat = V4L2_PIX_FMT_SDR_S14,
#endif
},
};
static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
/* 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;
};
struct msi3101_state {
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;
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];
int (*convert_stream)(struct msi3101_state *s, u8 *dst, u8 *src,
unsigned int src_len);
/* Controls */
struct v4l2_ctrl_handler hdl;
u32 next_sample; /* for track lost packets */
u32 sample; /* for sample rate calc */
unsigned long jiffies_next;
unsigned int sample_ctrl_bit[4];
};
/* 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;
}
/*
* +===========================================================================
* | 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
*/
static int msi3101_convert_stream_504(struct msi3101_state *s, u8 *dst,
u8 *src, unsigned int src_len)
{
int i, i_max, dst_len = 0;
u32 sample_num[3];
/* There could be 1-3 1024 bytes URB frames */
i_max = src_len / 1024;
for (i = 0; i < i_max; i++) {
sample_num[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
if (i == 0 && s->next_sample != sample_num[0]) {
dev_dbg_ratelimited(&s->udev->dev,
"%d samples lost, %d %08x:%08x\n",
sample_num[0] - s->next_sample,
src_len, s->next_sample, sample_num[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(&s->udev->dev, "%*ph\n", 12, &src[4]);
/* 504 x I+Q samples */
src += 16;
memcpy(dst, src, 1008);
src += 1008;
dst += 1008;
dst_len += 1008;
}
/* calculate samping rate and output it in 10 seconds intervals */
if ((s->jiffies_next + msecs_to_jiffies(10000)) <= jiffies) {
unsigned long jiffies_now = jiffies;
unsigned long msecs = jiffies_to_msecs(jiffies_now) - jiffies_to_msecs(s->jiffies_next);
unsigned int samples = sample_num[i_max - 1] - s->sample;
s->jiffies_next = jiffies_now;
s->sample = sample_num[i_max - 1];
dev_dbg(&s->udev->dev,
"slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
src_len, samples, msecs,
samples * 1000UL / msecs);
}
/* next sample (sample = sample + i * 504) */
s->next_sample = sample_num[i_max - 1] + 504;
return dst_len;
}
static int msi3101_convert_stream_504_u8(struct msi3101_state *s, u8 *dst,
u8 *src, unsigned int src_len)
{
int i, j, i_max, dst_len = 0;
u32 sample_num[3];
s8 *s8src;
u8 *u8dst;
/* There could be 1-3 1024 bytes URB frames */
i_max = src_len / 1024;
u8dst = (u8 *) dst;
for (i = 0; i < i_max; i++) {
sample_num[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
if (i == 0 && s->next_sample != sample_num[0]) {
dev_dbg_ratelimited(&s->udev->dev,
"%d samples lost, %d %08x:%08x\n",
sample_num[0] - s->next_sample,
src_len, s->next_sample, sample_num[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(&s->udev->dev, "%*ph\n", 12, &src[4]);
/* 504 x I+Q samples */
src += 16;
s8src = (s8 *) src;
for (j = 0; j < 1008; j++)
*u8dst++ = *s8src++ + 128;
src += 1008;
dst += 1008;
dst_len += 1008;
}
/* calculate samping rate and output it in 10 seconds intervals */
if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
#define MSECS 10000UL
unsigned int samples = sample_num[i_max - 1] - s->sample;
s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
s->sample = sample_num[i_max - 1];
dev_dbg(&s->udev->dev,
"slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
src_len, samples, MSECS,
samples * 1000UL / MSECS);
}
/* next sample (sample = sample + i * 504) */
s->next_sample = sample_num[i_max - 1] + 504;
return dst_len;
}
/*
* +===========================================================================
* | 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
*/
static int msi3101_convert_stream_384(struct msi3101_state *s, u8 *dst,
u8 *src, unsigned int src_len)
{
int i, i_max, dst_len = 0;
u32 sample_num[3];
/* There could be 1-3 1024 bytes URB frames */
i_max = src_len / 1024;
for (i = 0; i < i_max; i++) {
sample_num[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
if (i == 0 && s->next_sample != sample_num[0]) {
dev_dbg_ratelimited(&s->udev->dev,
"%d samples lost, %d %08x:%08x\n",
sample_num[0] - s->next_sample,
src_len, s->next_sample, sample_num[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(&s->udev->dev,
"%*ph %*ph\n", 12, &src[4], 24, &src[1000]);
/* 384 x I+Q samples */
src += 16;
memcpy(dst, src, 984);
src += 984 + 24;
dst += 984;
dst_len += 984;
}
/* calculate samping rate and output it in 10 seconds intervals */
if ((s->jiffies_next + msecs_to_jiffies(10000)) <= jiffies) {
unsigned long jiffies_now = jiffies;
unsigned long msecs = jiffies_to_msecs(jiffies_now) - jiffies_to_msecs(s->jiffies_next);
unsigned int samples = sample_num[i_max - 1] - s->sample;
s->jiffies_next = jiffies_now;
s->sample = sample_num[i_max - 1];
dev_dbg(&s->udev->dev,
"slen=%d samples=%u msecs=%lu sampling rate=%lu bits=%d.%d.%d.%d\n",
src_len, samples, msecs,
samples * 1000UL / msecs,
s->sample_ctrl_bit[0], s->sample_ctrl_bit[1],
s->sample_ctrl_bit[2], s->sample_ctrl_bit[3]);
}
/* next sample (sample = sample + i * 384) */
s->next_sample = sample_num[i_max - 1] + 384;
return dst_len;
}
/*
* +===========================================================================
* | 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
*/
static int msi3101_convert_stream_336(struct msi3101_state *s, u8 *dst,
u8 *src, unsigned int src_len)
{
int i, i_max, dst_len = 0;
u32 sample_num[3];
/* There could be 1-3 1024 bytes URB frames */
i_max = src_len / 1024;
for (i = 0; i < i_max; i++) {
sample_num[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
if (i == 0 && s->next_sample != sample_num[0]) {
dev_dbg_ratelimited(&s->udev->dev,
"%d samples lost, %d %08x:%08x\n",
sample_num[0] - s->next_sample,
src_len, s->next_sample, sample_num[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(&s->udev->dev, "%*ph\n", 12, &src[4]);
/* 336 x I+Q samples */
src += 16;
memcpy(dst, src, 1008);
src += 1008;
dst += 1008;
dst_len += 1008;
}
/* calculate samping rate and output it in 10 seconds intervals */
if ((s->jiffies_next + msecs_to_jiffies(10000)) <= jiffies) {
unsigned long jiffies_now = jiffies;
unsigned long msecs = jiffies_to_msecs(jiffies_now) - jiffies_to_msecs(s->jiffies_next);
unsigned int samples = sample_num[i_max - 1] - s->sample;
s->jiffies_next = jiffies_now;
s->sample = sample_num[i_max - 1];
dev_dbg(&s->udev->dev,
"slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
src_len, samples, msecs,
samples * 1000UL / msecs);
}
/* next sample (sample = sample + i * 336) */
s->next_sample = sample_num[i_max - 1] + 336;
return dst_len;
}
/*
* +===========================================================================
* | 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 msi3101_convert_stream_252(struct msi3101_state *s, u8 *dst,
u8 *src, unsigned int src_len)
{
int i, i_max, dst_len = 0;
u32 sample_num[3];
/* There could be 1-3 1024 bytes URB frames */
i_max = src_len / 1024;
for (i = 0; i < i_max; i++) {
sample_num[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
if (i == 0 && s->next_sample != sample_num[0]) {
dev_dbg_ratelimited(&s->udev->dev,
"%d samples lost, %d %08x:%08x\n",
sample_num[0] - s->next_sample,
src_len, s->next_sample, sample_num[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(&s->udev->dev, "%*ph\n", 12, &src[4]);
/* 252 x I+Q samples */
src += 16;
memcpy(dst, src, 1008);
src += 1008;
dst += 1008;
dst_len += 1008;
}
/* calculate samping rate and output it in 10 seconds intervals */
if ((s->jiffies_next + msecs_to_jiffies(10000)) <= jiffies) {
unsigned long jiffies_now = jiffies;
unsigned long msecs = jiffies_to_msecs(jiffies_now) - jiffies_to_msecs(s->jiffies_next);
unsigned int samples = sample_num[i_max - 1] - s->sample;
s->jiffies_next = jiffies_now;
s->sample = sample_num[i_max - 1];
dev_dbg(&s->udev->dev,
"slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
src_len, samples, msecs,
samples * 1000UL / msecs);
}
/* next sample (sample = sample + i * 252) */
s->next_sample = sample_num[i_max - 1] + 252;
return dst_len;
}
static int msi3101_convert_stream_252_u16(struct msi3101_state *s, u8 *dst,
u8 *src, unsigned int src_len)
{
int i, j, i_max, dst_len = 0;
u32 sample_num[3];
u16 *u16dst = (u16 *) dst;
struct {signed int x:14;} se;
/* There could be 1-3 1024 bytes URB frames */
i_max = src_len / 1024;
for (i = 0; i < i_max; i++) {
sample_num[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0;
if (i == 0 && s->next_sample != sample_num[0]) {
dev_dbg_ratelimited(&s->udev->dev,
"%d samples lost, %d %08x:%08x\n",
sample_num[0] - s->next_sample,
src_len, s->next_sample, sample_num[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(&s->udev->dev, "%*ph\n", 12, &src[4]);
/* 252 x I+Q samples */
src += 16;
for (j = 0; j < 1008; j += 4) {
unsigned int usample[2];
int ssample[2];
usample[0] = src[j + 0] >> 0 | src[j + 1] << 8;
usample[1] = src[j + 2] >> 0 | src[j + 3] << 8;
/* sign extension from 14-bit to signed int */
ssample[0] = se.x = usample[0];
ssample[1] = se.x = usample[1];
/* from signed to unsigned */
usample[0] = ssample[0] + 8192;
usample[1] = ssample[1] + 8192;
/* from 14-bit to 16-bit */
*u16dst++ = (usample[0] << 2) | (usample[0] >> 12);
*u16dst++ = (usample[1] << 2) | (usample[1] >> 12);
}
src += 1008;
dst += 1008;
dst_len += 1008;
}
/* calculate samping rate and output it in 10 seconds intervals */
if (unlikely(time_is_before_jiffies(s->jiffies_next))) {
#define MSECS 10000UL
unsigned int samples = sample_num[i_max - 1] - s->sample;
s->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
s->sample = sample_num[i_max - 1];
dev_dbg(&s->udev->dev,
"slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
src_len, samples, MSECS,
samples * 1000UL / MSECS);
}
/* next sample (sample = sample + i * 252) */
s->next_sample = sample_num[i_max - 1] + 252;
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 (unlikely(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 (unlikely(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++) {
void *ptr;
/* Check frame error */
fstatus = urb->iso_frame_desc[i].status;
if (unlikely(fstatus)) {
dev_dbg_ratelimited(&s->udev->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 = msi3101_get_next_fill_buf(s);
if (unlikely(fbuf == NULL)) {
s->vb_full++;
dev_dbg_ratelimited(&s->udev->dev,
"videobuf is full, %d packets dropped\n",
s->vb_full);
continue;
}
/* fill framebuffer */
ptr = vb2_plane_vaddr(&fbuf->vb, 0);
flen = s->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->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)
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);
spi_unregister_master(s->master);
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_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 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 = clamp_t(unsigned int, *nbuffers, 8, 32);
*nplanes = 1;
/*
* 3, wMaxPacketSize 3x 1024 bytes
* 504, max IQ sample pairs per 1024 frame
* 2, two samples, I and Q
* 2, 16-bit is enough for single sample
*/
sizes[0] = PAGE_ALIGN(3 * 504 * 2 * 2);
dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
__func__, *nbuffers, sizes[0]);
return 0;
}
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 (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 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_sndctrlpipe(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;
};
#define F_REF 24000000
#define DIV_R_IN 2
static int msi3101_set_usb_adc(struct msi3101_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:
s->convert_stream = msi3101_convert_stream_504_u8;
reg7 = 0x000c9407;
break;
case V4L2_SDR_FMT_CU16LE:
s->convert_stream = msi3101_convert_stream_252_u16;
reg7 = 0x00009407;
break;
case V4L2_PIX_FMT_SDR_S8:
s->convert_stream = msi3101_convert_stream_504;
reg7 = 0x000c9407;
break;
case V4L2_PIX_FMT_SDR_MSI2500_384:
s->convert_stream = msi3101_convert_stream_384;
reg7 = 0x0000a507;
break;
case V4L2_PIX_FMT_SDR_S12:
s->convert_stream = msi3101_convert_stream_336;
reg7 = 0x00008507;
break;
case V4L2_PIX_FMT_SDR_S14:
s->convert_stream = msi3101_convert_stream_252;
reg7 = 0x00009407;
break;
default:
s->convert_stream = msi3101_convert_stream_504_u8;
reg7 = 0x000c9407;
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->udev->dev, "%s: div_r_out=%d f_vco=%d\n",
__func__, 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->udev->dev,
"%s: f_sr=%d f_vco=%d div_n=%d div_m=%d div_r_out=%d reg3=%08x reg4=%08x\n",
__func__, f_sr, f_vco, div_n, div_m, div_r_out, reg3, 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, reg7);
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_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;
/* wake-up tuner */
v4l2_subdev_call(s->v4l2_subdev, core, s_power, 1);
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 void msi3101_stop_streaming(struct vb2_queue *vq)
{
struct msi3101_state *s = vb2_get_drv_priv(vq);
dev_dbg(&s->udev->dev, "%s:\n", __func__);
mutex_lock(&s->v4l2_lock);
if (s->udev)
msi3101_isoc_cleanup(s);
msi3101_cleanup_queued_bufs(s);
/* according to tests, at least 700us delay is required */
msleep(20);
if (!msi3101_ctrl_msg(s, CMD_STOP_STREAMING, 0)) {
/* sleep USB IF / ADC */
msi3101_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 msi3101_vb2_ops = {
.queue_setup = msi3101_queue_setup,
.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_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct msi3101_state *s = video_drvdata(file);
dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, f->index);
if (f->index >= NUM_FORMATS)
return -EINVAL;
strlcpy(f->description, formats[f->index].name, sizeof(f->description));
f->pixelformat = formats[f->index].pixelformat;
return 0;
}
static int msi3101_g_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct msi3101_state *s = video_drvdata(file);
dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
(char *)&s->pixelformat);
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
f->fmt.sdr.pixelformat = s->pixelformat;
return 0;
}
static int msi3101_s_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct msi3101_state *s = video_drvdata(file);
struct vb2_queue *q = &s->vb_queue;
int i;
dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
(char *)&f->fmt.sdr.pixelformat);
if (vb2_is_busy(q))
return -EBUSY;
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
for (i = 0; i < NUM_FORMATS; i++) {
if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
s->pixelformat = f->fmt.sdr.pixelformat;
return 0;
}
}
f->fmt.sdr.pixelformat = formats[0].pixelformat;
s->pixelformat = formats[0].pixelformat;
return 0;
}
static int msi3101_try_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct msi3101_state *s = video_drvdata(file);
int i;
dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__,
(char *)&f->fmt.sdr.pixelformat);
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
for (i = 0; i < NUM_FORMATS; i++) {
if (formats[i].pixelformat == f->fmt.sdr.pixelformat)
return 0;
}
f->fmt.sdr.pixelformat = formats[0].pixelformat;
return 0;
}
static int msi3101_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *v)
{
struct msi3101_state *s = video_drvdata(file);
int ret;
dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
if (v->index == 0)
ret = 0;
else if (v->index == 1)
ret = v4l2_subdev_call(s->v4l2_subdev, tuner, s_tuner, v);
else
ret = -EINVAL;
return ret;
}
static int msi3101_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
{
struct msi3101_state *s = video_drvdata(file);
int ret;
dev_dbg(&s->udev->dev, "%s: index=%d\n", __func__, v->index);
if (v->index == 0) {
strlcpy(v->name, "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 msi3101_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct msi3101_state *s = video_drvdata(file);
int ret = 0;
dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d\n",
__func__, f->tuner, f->type);
if (f->tuner == 0) {
f->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 msi3101_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct msi3101_state *s = video_drvdata(file);
int ret;
dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d frequency=%u\n",
__func__, f->tuner, f->type, f->frequency);
if (f->tuner == 0) {
s->f_adc = clamp_t(unsigned int, f->frequency,
bands[0].rangelow,
bands[0].rangehigh);
dev_dbg(&s->udev->dev, "%s: ADC frequency=%u Hz\n",
__func__, s->f_adc);
ret = msi3101_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 msi3101_enum_freq_bands(struct file *file, void *priv,
struct v4l2_frequency_band *band)
{
struct msi3101_state *s = video_drvdata(file);
int ret;
dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d index=%d\n",
__func__, band->tuner, band->type, band->index);
if (band->tuner == 0) {
if (band->index >= ARRAY_SIZE(bands)) {
ret = -EINVAL;
} else {
*band = bands[band->index];
ret = 0;
}
} else if (band->tuner == 1) {
ret = v4l2_subdev_call(s->v4l2_subdev, tuner,
enum_freq_bands, band);
} else {
ret = -EINVAL;
}
return ret;
}
static const struct v4l2_ioctl_ops msi3101_ioctl_ops = {
.vidioc_querycap = msi3101_querycap,
.vidioc_enum_fmt_sdr_cap = msi3101_enum_fmt_sdr_cap,
.vidioc_g_fmt_sdr_cap = msi3101_g_fmt_sdr_cap,
.vidioc_s_fmt_sdr_cap = msi3101_s_fmt_sdr_cap,
.vidioc_try_fmt_sdr_cap = msi3101_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 = msi3101_g_tuner,
.vidioc_s_tuner = msi3101_s_tuner,
.vidioc_g_frequency = msi3101_g_frequency,
.vidioc_s_frequency = msi3101_s_frequency,
.vidioc_enum_freq_bands = msi3101_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 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 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->hdl);
v4l2_device_unregister(&s->v4l2_dev);
kfree(s);
}
static int msi3101_transfer_one_message(struct spi_master *master,
struct spi_message *m)
{
struct msi3101_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->udev->dev, "%s: msg=%*ph\n",
__func__, 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 = msi3101_ctrl_msg(s, CMD_WREG, data);
}
m->status = ret;
spi_finalize_current_message(master);
return ret;
}
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;
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 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;
s->f_adc = bands[0].rangelow;
s->pixelformat = V4L2_SDR_FMT_CU8;
/* 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 msi3101_frame_buf);
s->vb_queue.ops = &msi3101_vb2_ops;
s->vb_queue.mem_ops = &vb2_vmalloc_memops;
s->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
ret = vb2_queue_init(&s->vb_queue);
if (ret) {
dev_err(&s->udev->dev, "Could not initialize vb2 queue\n");
goto err_free_mem;
}
/* Init video_device structure */
s->vdev = 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 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_mem;
}
/* SPI master adapter */
master = spi_alloc_master(&s->udev->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 = msi3101_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->udev->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->udev->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->udev->dev,
"Failed to register as video device (%d)\n",
ret);
goto err_unregister_v4l2_dev;
}
dev_info(&s->udev->dev, "Registered as %s\n",
video_device_node_name(&s->vdev));
return 0;
err_free_controls:
v4l2_ctrl_handler_free(&s->hdl);
err_unregister_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 msi3101_id_table[] = {
{ USB_DEVICE(0x1df7, 0x2500) }, /* Mirics MSi3101 SDR Dongle */
{ USB_DEVICE(0x2040, 0xd300) }, /* Hauppauge WinTV 133559 LF */
{ }
};
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");
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