* 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>
+ *
+ * Development tree of that driver will be on:
+ * http://git.linuxtv.org/anttip/media_tree.git/shortlog/refs/heads/mirics
+ *
+ * GNU Radio plugin "gr-kernel" for device usage will be on:
+ * http://git.linuxtv.org/anttip/gr-kernel.git
+ *
+ * TODO:
+ * I will look these:
+ * - split RF tuner and USB ADC interface to own drivers (msi2500 and msi001)
+ * - move controls to V4L2 API
+ *
+ * Help is very highly welcome for these + all the others you could imagine:
+ * - use libv4l2 for stream format conversions
+ * - gr-kernel: switch to v4l2_mmap (current read eats a lot of cpu)
+ * - SDRSharp support
*/
-#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 {
#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 MSI3101_CID_SAMPLING_MODE ((V4L2_CID_USER_BASE | 0xf000) + 0)
#define MSI3101_CID_SAMPLING_RATE ((V4L2_CID_USER_BASE | 0xf000) + 1)
#define MSI3101_CID_SAMPLING_RESOLUTION ((V4L2_CID_USER_BASE | 0xf000) + 2)
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 {
*/
/*
- * 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.)
+ * Integer to 32-bit IEEE floating point representation routine is taken
+ * from Radeon R600 driver (drivers/gpu/drm/radeon/r600_blit_kms.c).
+ *
+ * TODO: Currently we do conversion here in Kernel, but in future that will
+ * be moved to the libv4l2 library as video format conversions are.
*/
#define I2F_FRAC_BITS 23
#define I2F_MASK ((1 << I2F_FRAC_BITS) - 1)
+
+/*
+ * Converts signed ~10+3-bit integer into 32-bit IEEE floating point
+ * representation.
+ */
static u32 msi3101_convert_sample_384(struct msi3101_state *s, u16 x, int shift)
{
u32 msb, exponent, fraction, sign;
/* 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_384(struct msi3101_state *s, u32 *dst,
u8 *src, unsigned int src_len)
{
int i, j, k, l, i_max, dst_len = 0;
u16 sample[4];
u32 bits;
-#ifdef MSI3101_EXTENSIVE_DEBUG
u32 sample_num[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
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(&s->udev->dev,
+ 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]);
*/
dev_dbg_ratelimited(&s->udev->dev,
"%*ph %*ph\n", 12, &src[4], 24, &src[1000]);
- memset(&src[4], 0, 12);
- memset(&src[1000], 0, 24);
-#endif
+
src += 16;
for (j = 0; j < 6; j++) {
bits = src[160 + 3] << 24 | src[160 + 2] << 16 | src[160 + 1] << 8 | src[160 + 0] << 0;
*dst++ = msi3101_convert_sample_384(s, sample[1], (bits >> (2 * k)) & 0x3);
*dst++ = msi3101_convert_sample_384(s, sample[2], (bits >> (2 * k)) & 0x3);
*dst++ = msi3101_convert_sample_384(s, sample[3], (bits >> (2 * k)) & 0x3);
-
- /* 4 x 32bit float samples */
- dst_len += 4 * 4;
}
src += 10;
}
-#ifdef MSI3101_EXTENSIVE_DEBUG
dev_dbg_ratelimited(&s->udev->dev,
"sample control bits %08x\n", bits);
-#endif
src += 4;
}
+ /* 384 x I+Q 32bit float samples */
+ dst_len += 384 * 2 * 4;
src += 24;
}
-#ifdef MSI3101_EXTENSIVE_DEBUG
/* calculate samping rate and output it in 10 seconds intervals */
if ((s->jiffies + msecs_to_jiffies(10000)) <= jiffies) {
unsigned long jiffies_now = jiffies;
/* next sample (sample = sample + i * 384) */
s->next_sample = sample_num[i_max - 1] + 384;
-#endif
+
return dst_len;
}
/* 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;
/*
* Converts signed 14-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 u32 msi3101_convert_sample_252(struct msi3101_state *s, u16 x)
{
u32 msb, exponent, fraction, sign;
/* 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;
/* Check frame error */
fstatus = urb->iso_frame_desc[i].status;
if (fstatus) {
- dev_dbg(&s->udev->dev,
+ dev_dbg_ratelimited(&s->udev->dev,
"frame=%d/%d has error %d skipping\n",
i, urb->number_of_packets, fstatus);
goto skip;
}
/* fill framebuffer */
-#ifdef MSI3101_CONVERT_IN_URB_HANDLER
ptr = vb2_plane_vaddr(&fbuf->vb, 0);
flen = s->convert_stream(s, ptr, iso_buf, flen);
vb2_set_plane_payload(&fbuf->vb, 0, flen);
-#else
- memcpy(fbuf->data, iso_buf, flen);
- fbuf->filled = flen;
-#endif
vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
skip:
;
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);
return 0;
}
-#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_384(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);
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,
/* USB device ID list */
static struct usb_device_id msi3101_id_table[] = {
- { USB_DEVICE(0x1df7, 0x2500) },
+ { USB_DEVICE(0x1df7, 0x2500) }, /* Mirics MSi3101 SDR Dongle */
{ USB_DEVICE(0x2040, 0xd300) }, /* Hauppauge WinTV 133559 LF */
{ }
};
projects / linux-beck.git / commitdiff