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linuxdebug/drivers/media/usb/msi2500/msi2500.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Mirics MSi2500 driver
* Mirics MSi3101 SDR Dongle driver
*
* Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
*
* 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-v4l2.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 {
u32 pixelformat;
u32 buffersize;
};
/* format descriptions for capture and preview */
static struct msi2500_format formats[] = {
{
.pixelformat = V4L2_SDR_FMT_CS8,
.buffersize = 3 * 1008,
#if 0
}, {
.pixelformat = MSI2500_PIX_FMT_SDR_MSI2500_384,
}, {
.pixelformat = MSI2500_PIX_FMT_SDR_S12,
#endif
}, {
.pixelformat = V4L2_SDR_FMT_CS14LE,
.buffersize = 3 * 1008,
}, {
.pixelformat = V4L2_SDR_FMT_CU8,
.buffersize = 3 * 1008,
}, {
.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 {
/* common v4l buffer stuff -- must be first */
struct vb2_v4l2_buffer vb;
struct list_head list;
};
struct msi2500_dev {
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_dev *dev)
{
unsigned long flags;
struct msi2500_frame_buf *buf = NULL;
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
if (list_empty(&dev->queued_bufs))
goto leave;
buf = list_entry(dev->queued_bufs.next, struct msi2500_frame_buf, list);
list_del(&buf->list);
leave:
spin_unlock_irqrestore(&dev->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
* 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_dev *dev, 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 && dev->next_sample != sample[0]) {
dev_dbg_ratelimited(dev->dev,
"%d samples lost, %d %08x:%08x\n",
sample[0] - dev->next_sample,
src_len, dev->next_sample,
sample[0]);
}
/*
* Dump all unknown 'garbage' data - maybe we will discover
* someday if there is something rational...
*/
dev_dbg_ratelimited(dev->dev, "%*ph\n", 12, &src[4]);
src += 16; /* skip header */
switch (dev->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;
dev->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;
dev->next_sample = sample[i] + 252;
break;
}
case MSI2500_PIX_FMT_SDR_MSI2500_384: /* 384 x IQ samples */
/* Dump unknown 'garbage' data */
dev_dbg_ratelimited(dev->dev, "%*ph\n", 24, &src[1000]);
memcpy(dst, src, 984);
src += 984 + 24;
dst += 984;
dst_len += 984;
dev->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;
dev->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;
dev->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;
dev->next_sample = sample[i] + 252;
break;
default:
break;
}
}
/* calculate sample rate and output it in 10 seconds intervals */
if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
#define MSECS 10000UL
unsigned int msecs = jiffies_to_msecs(jiffies -
dev->jiffies_next + msecs_to_jiffies(MSECS));
unsigned int samples = dev->next_sample - dev->sample;
dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
dev->sample = dev->next_sample;
dev_dbg(dev->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_dev *dev = (struct msi2500_dev *)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(dev->dev, "URB (%p) unlinked %ssynchronously\n",
urb, urb->status == -ENOENT ? "" : "a");
return;
}
if (unlikely(urb->status != 0)) {
dev_dbg(dev->dev, "called with status %d\n", urb->status);
/* Give up after a number of contiguous errors */
if (++dev->isoc_errors > MAX_ISOC_ERRORS)
dev_dbg(dev->dev, "Too many ISOC errors, bailing out\n");
goto handler_end;
} else {
/* Reset ISOC error counter. We did get here, after all. */
dev->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(dev->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(dev);
if (unlikely(fbuf == NULL)) {
dev->vb_full++;
dev_dbg_ratelimited(dev->dev,
"video buffer is full, %d packets dropped\n",
dev->vb_full);
continue;
}
/* fill framebuffer */
ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
flen = msi2500_convert_stream(dev, ptr, iso_buf, flen);
vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, flen);
vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
}
handler_end:
i = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(i != 0))
dev_dbg(dev->dev, "Error (%d) re-submitting urb\n", i);
}
static void msi2500_iso_stop(struct msi2500_dev *dev)
{
int i;
dev_dbg(dev->dev, "\n");
/* Unlinking ISOC buffers one by one */
for (i = 0; i < MAX_ISO_BUFS; i++) {
if (dev->urbs[i]) {
dev_dbg(dev->dev, "Unlinking URB %p\n", dev->urbs[i]);
usb_kill_urb(dev->urbs[i]);
}
}
}
static void msi2500_iso_free(struct msi2500_dev *dev)
{
int i;
dev_dbg(dev->dev, "\n");
/* Freeing ISOC buffers one by one */
for (i = 0; i < MAX_ISO_BUFS; i++) {
if (dev->urbs[i]) {
dev_dbg(dev->dev, "Freeing URB\n");
if (dev->urbs[i]->transfer_buffer) {
usb_free_coherent(dev->udev,
dev->urbs[i]->transfer_buffer_length,
dev->urbs[i]->transfer_buffer,
dev->urbs[i]->transfer_dma);
}
usb_free_urb(dev->urbs[i]);
dev->urbs[i] = NULL;
}
}
}
/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
static void msi2500_isoc_cleanup(struct msi2500_dev *dev)
{
dev_dbg(dev->dev, "\n");
msi2500_iso_stop(dev);
msi2500_iso_free(dev);
}
/* Both v4l2_lock and vb_queue_lock should be locked when calling this */
static int msi2500_isoc_init(struct msi2500_dev *dev)
{
struct urb *urb;
int i, j, ret;
dev_dbg(dev->dev, "\n");
dev->isoc_errors = 0;
ret = usb_set_interface(dev->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) {
msi2500_isoc_cleanup(dev);
return -ENOMEM;
}
dev->urbs[i] = urb;
dev_dbg(dev->dev, "Allocated URB at 0x%p\n", urb);
urb->interval = 1;
urb->dev = dev->udev;
urb->pipe = usb_rcvisocpipe(dev->udev, 0x81);
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
urb->transfer_buffer = usb_alloc_coherent(dev->udev,
ISO_BUFFER_SIZE,
GFP_KERNEL, &urb->transfer_dma);
if (urb->transfer_buffer == NULL) {
dev_err(dev->dev,
"Failed to allocate urb buffer %d\n", i);
msi2500_isoc_cleanup(dev);
return -ENOMEM;
}
urb->transfer_buffer_length = ISO_BUFFER_SIZE;
urb->complete = msi2500_isoc_handler;
urb->context = dev;
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(dev->urbs[i], GFP_KERNEL);
if (ret) {
dev_err(dev->dev,
"usb_submit_urb %d failed with error %d\n",
i, ret);
msi2500_isoc_cleanup(dev);
return ret;
}
dev_dbg(dev->dev, "URB 0x%p submitted.\n", dev->urbs[i]);
}
/* All is done... */
return 0;
}
/* Must be called with vb_queue_lock hold */
static void msi2500_cleanup_queued_bufs(struct msi2500_dev *dev)
{
unsigned long flags;
dev_dbg(dev->dev, "\n");
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
while (!list_empty(&dev->queued_bufs)) {
struct msi2500_frame_buf *buf;
buf = list_entry(dev->queued_bufs.next,
struct msi2500_frame_buf, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&dev->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_dev *dev =
container_of(v, struct msi2500_dev, v4l2_dev);
dev_dbg(dev->dev, "\n");
mutex_lock(&dev->vb_queue_lock);
mutex_lock(&dev->v4l2_lock);
/* No need to keep the urbs around after disconnection */
dev->udev = NULL;
v4l2_device_disconnect(&dev->v4l2_dev);
video_unregister_device(&dev->vdev);
spi_unregister_master(dev->master);
mutex_unlock(&dev->v4l2_lock);
mutex_unlock(&dev->vb_queue_lock);
v4l2_device_put(&dev->v4l2_dev);
}
static int msi2500_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
struct msi2500_dev *dev = video_drvdata(file);
dev_dbg(dev->dev, "\n");
strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
return 0;
}
/* Videobuf2 operations */
static int msi2500_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct msi2500_dev *dev = vb2_get_drv_priv(vq);
dev_dbg(dev->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(dev->buffersize);
dev_dbg(dev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
return 0;
}
static void msi2500_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct msi2500_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct msi2500_frame_buf *buf = container_of(vbuf,
struct msi2500_frame_buf,
vb);
unsigned long flags;
/* Check the device has not disconnected between prep and queuing */
if (unlikely(!dev->udev)) {
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
return;
}
spin_lock_irqsave(&dev->queued_bufs_lock, flags);
list_add_tail(&buf->list, &dev->queued_bufs);
spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
}
#define CMD_WREG 0x41
#define CMD_START_STREAMING 0x43
#define CMD_STOP_STREAMING 0x45
#define CMD_READ_UNKNOWN 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_dev *dev, 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(dev->dev, request, requesttype,
value, index, NULL, 0);
ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), request,
requesttype, value, index, NULL, 0, 2000);
if (ret)
dev_err(dev->dev, "failed %d, cmd %02x, data %04x\n",
ret, cmd, data);
return ret;
}
static int msi2500_set_usb_adc(struct msi2500_dev *dev)
{
int ret;
unsigned int f_vco, f_sr, div_n, k, k_cw, div_out;
u32 reg3, reg4, reg7;
struct v4l2_ctrl *bandwidth_auto;
struct v4l2_ctrl *bandwidth;
f_sr = dev->f_adc;
/* set tuner, subdev, filters according to sampling rate */
bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
bandwidth = v4l2_ctrl_find(&dev->hdl,
V4L2_CID_RF_TUNER_BANDWIDTH);
v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
}
/* select stream format */
switch (dev->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;
}
/*
* Fractional-N synthesizer
*
* +----------------------------------------+
* v |
* Fref +----+ +-------+ +-----+ +------+ +---+
* ------> | PD | --> | VCO | --> | /2 | ------> | /N.F | <-- | K |
* +----+ +-------+ +-----+ +------+ +---+
* |
* |
* v
* +-------+ +-----+ Fout
* | /Rout | --> | /12 | ------>
* +-------+ +-----+
*/
/*
* 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++
*/
#define F_REF 24000000
#define DIV_PRE_N 2
#define DIV_LO_OUT 12
reg3 = 0x01000303;
reg4 = 0x00000004;
/* XXX: Filters? AGC? VCO band? */
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_out = 4; div_out < 16; div_out += 2) {
f_vco = f_sr * div_out * DIV_LO_OUT;
dev_dbg(dev->dev, "div_out=%u f_vco=%u\n", div_out, f_vco);
if (f_vco >= 202000000)
break;
}
/* Calculate PLL integer and fractional control word. */
div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
k_cw = div_u64((u64) k * 0x200000, DIV_PRE_N * F_REF);
reg3 |= div_n << 16;
reg3 |= (div_out / 2 - 1) << 10;
reg3 |= ((k_cw >> 20) & 0x000001) << 15; /* [20] */
reg4 |= ((k_cw >> 0) & 0x0fffff) << 8; /* [19:0] */
dev_dbg(dev->dev,
"f_sr=%u f_vco=%u div_n=%u k=%u div_out=%u reg3=%08x reg4=%08x\n",
f_sr, f_vco, div_n, k, div_out, reg3, reg4);
ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00608008);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00000c05);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00020000);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00480102);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, 0x00f38008);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, reg7);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, reg4);
if (ret)
goto err;
ret = msi2500_ctrl_msg(dev, CMD_WREG, reg3);
err:
return ret;
}
static int msi2500_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct msi2500_dev *dev = vb2_get_drv_priv(vq);
int ret;
dev_dbg(dev->dev, "\n");
if (!dev->udev)
return -ENODEV;
if (mutex_lock_interruptible(&dev->v4l2_lock))
return -ERESTARTSYS;
/* wake-up tuner */
v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
ret = msi2500_set_usb_adc(dev);
ret = msi2500_isoc_init(dev);
if (ret)
msi2500_cleanup_queued_bufs(dev);
ret = msi2500_ctrl_msg(dev, CMD_START_STREAMING, 0);
mutex_unlock(&dev->v4l2_lock);
return ret;
}
static void msi2500_stop_streaming(struct vb2_queue *vq)
{
struct msi2500_dev *dev = vb2_get_drv_priv(vq);
dev_dbg(dev->dev, "\n");
mutex_lock(&dev->v4l2_lock);
if (dev->udev)
msi2500_isoc_cleanup(dev);
msi2500_cleanup_queued_bufs(dev);
/* according to tests, at least 700us delay is required */
msleep(20);
if (dev->udev && !msi2500_ctrl_msg(dev, CMD_STOP_STREAMING, 0)) {
/* sleep USB IF / ADC */
msi2500_ctrl_msg(dev, CMD_WREG, 0x01000003);
}
/* sleep tuner */
v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
mutex_unlock(&dev->v4l2_lock);
}
static const 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_dev *dev = video_drvdata(file);
dev_dbg(dev->dev, "index=%d\n", f->index);
if (f->index >= dev->num_formats)
return -EINVAL;
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_dev *dev = video_drvdata(file);
dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
(char *)&dev->pixelformat);
f->fmt.sdr.pixelformat = dev->pixelformat;
f->fmt.sdr.buffersize = dev->buffersize;
return 0;
}
static int msi2500_s_fmt_sdr_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct msi2500_dev *dev = video_drvdata(file);
struct vb2_queue *q = &dev->vb_queue;
int i;
dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
(char *)&f->fmt.sdr.pixelformat);
if (vb2_is_busy(q))
return -EBUSY;
for (i = 0; i < dev->num_formats; i++) {
if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
dev->pixelformat = formats[i].pixelformat;
dev->buffersize = formats[i].buffersize;
f->fmt.sdr.buffersize = formats[i].buffersize;
return 0;
}
}
dev->pixelformat = formats[0].pixelformat;
dev->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_dev *dev = video_drvdata(file);
int i;
dev_dbg(dev->dev, "pixelformat fourcc %4.4s\n",
(char *)&f->fmt.sdr.pixelformat);
for (i = 0; i < dev->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_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "index=%d\n", v->index);
if (v->index == 0)
ret = 0;
else if (v->index == 1)
ret = v4l2_subdev_call(dev->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_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "index=%d\n", v->index);
if (v->index == 0) {
strscpy(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(dev->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_dev *dev = video_drvdata(file);
int ret = 0;
dev_dbg(dev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
if (f->tuner == 0) {
f->frequency = dev->f_adc;
ret = 0;
} else if (f->tuner == 1) {
f->type = V4L2_TUNER_RF;
ret = v4l2_subdev_call(dev->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_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->dev, "tuner=%d type=%d frequency=%u\n",
f->tuner, f->type, f->frequency);
if (f->tuner == 0) {
dev->f_adc = clamp_t(unsigned int, f->frequency,
bands[0].rangelow,
bands[0].rangehigh);
dev_dbg(dev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
ret = msi2500_set_usb_adc(dev);
} else if (f->tuner == 1) {
ret = v4l2_subdev_call(dev->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_dev *dev = video_drvdata(file);
int ret;
dev_dbg(dev->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(dev->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 const 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_dev *dev = container_of(v, struct msi2500_dev, v4l2_dev);
v4l2_ctrl_handler_free(&dev->hdl);
v4l2_device_unregister(&dev->v4l2_dev);
kfree(dev);
}
static int msi2500_transfer_one_message(struct spi_master *master,
struct spi_message *m)
{
struct msi2500_dev *dev = 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(dev->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(dev, 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_dev *dev;
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,
};
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
ret = -ENOMEM;
goto err;
}
mutex_init(&dev->v4l2_lock);
mutex_init(&dev->vb_queue_lock);
spin_lock_init(&dev->queued_bufs_lock);
INIT_LIST_HEAD(&dev->queued_bufs);
dev->dev = &intf->dev;
dev->udev = interface_to_usbdev(intf);
dev->f_adc = bands[0].rangelow;
dev->pixelformat = formats[0].pixelformat;
dev->buffersize = formats[0].buffersize;
dev->num_formats = NUM_FORMATS;
if (!msi2500_emulated_fmt)
dev->num_formats -= 2;
/* Init videobuf2 queue structure */
dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
dev->vb_queue.drv_priv = dev;
dev->vb_queue.buf_struct_size = sizeof(struct msi2500_frame_buf);
dev->vb_queue.ops = &msi2500_vb2_ops;
dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
ret = vb2_queue_init(&dev->vb_queue);
if (ret) {
dev_err(dev->dev, "Could not initialize vb2 queue\n");
goto err_free_mem;
}
/* Init video_device structure */
dev->vdev = msi2500_template;
dev->vdev.queue = &dev->vb_queue;
dev->vdev.queue->lock = &dev->vb_queue_lock;
video_set_drvdata(&dev->vdev, dev);
/* Register the v4l2_device structure */
dev->v4l2_dev.release = msi2500_video_release;
ret = v4l2_device_register(&intf->dev, &dev->v4l2_dev);
if (ret) {
dev_err(dev->dev, "Failed to register v4l2-device (%d)\n", ret);
goto err_free_mem;
}
/* SPI master adapter */
master = spi_alloc_master(dev->dev, 0);
if (master == NULL) {
ret = -ENOMEM;
goto err_unregister_v4l2_dev;
}
dev->master = master;
master->bus_num = -1;
master->num_chipselect = 1;
master->transfer_one_message = msi2500_transfer_one_message;
spi_master_set_devdata(master, dev);
ret = spi_register_master(master);
if (ret) {
spi_master_put(master);
goto err_unregister_v4l2_dev;
}
/* load v4l2 subdevice */
sd = v4l2_spi_new_subdev(&dev->v4l2_dev, master, &board_info);
dev->v4l2_subdev = sd;
if (sd == NULL) {
dev_err(dev->dev, "cannot get v4l2 subdevice\n");
ret = -ENODEV;
goto err_unregister_master;
}
/* Register controls */
v4l2_ctrl_handler_init(&dev->hdl, 0);
if (dev->hdl.error) {
ret = dev->hdl.error;
dev_err(dev->dev, "Could not initialize controls\n");
goto err_free_controls;
}
/* currently all controls are from subdev */
v4l2_ctrl_add_handler(&dev->hdl, sd->ctrl_handler, NULL, true);
dev->v4l2_dev.ctrl_handler = &dev->hdl;
dev->vdev.v4l2_dev = &dev->v4l2_dev;
dev->vdev.lock = &dev->v4l2_lock;
dev->vdev.device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
if (ret) {
dev_err(dev->dev,
"Failed to register as video device (%d)\n", ret);
goto err_unregister_v4l2_dev;
}
dev_info(dev->dev, "Registered as %s\n",
video_device_node_name(&dev->vdev));
dev_notice(dev->dev,
"SDR API is still slightly experimental and functionality changes may follow\n");
return 0;
err_free_controls:
v4l2_ctrl_handler_free(&dev->hdl);
err_unregister_master:
spi_unregister_master(dev->master);
err_unregister_v4l2_dev:
v4l2_device_unregister(&dev->v4l2_dev);
err_free_mem:
kfree(dev);
err:
return ret;
}
/* USB device ID list */
static const 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");