diff options
| -rw-r--r-- | drivers/staging/media/msi3101/sdr-msi3101.c | 141 |
1 files changed, 40 insertions, 101 deletions
diff --git a/drivers/staging/media/msi3101/sdr-msi3101.c b/drivers/staging/media/msi3101/sdr-msi3101.c index e7a21a2..a3cc4c6 100644 --- a/drivers/staging/media/msi3101/sdr-msi3101.c +++ b/drivers/staging/media/msi3101/sdr-msi3101.c @@ -16,20 +16,36 @@ * 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 { @@ -358,9 +374,9 @@ static const struct msi3101_gain msi3101_gain_lut_1000[] = { #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) @@ -373,8 +389,6 @@ static const struct msi3101_gain msi3101_gain_lut_1000[] = { 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 { @@ -478,14 +492,19 @@ leave: */ /* - * 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; @@ -510,35 +529,26 @@ static u32 msi3101_convert_sample_384(struct msi3101_state *s, u16 x, int shift) /* 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]); @@ -550,9 +560,7 @@ static int msi3101_convert_stream_384(struct msi3101_state *s, u32 *dst, */ 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; @@ -567,22 +575,18 @@ static int msi3101_convert_stream_384(struct msi3101_state *s, u32 *dst, *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; @@ -600,7 +604,7 @@ static int msi3101_convert_stream_384(struct msi3101_state *s, u32 *dst, /* next sample (sample = sample + i * 384) */ s->next_sample = sample_num[i_max - 1] + 384; -#endif + return dst_len; } @@ -628,11 +632,6 @@ static u32 msi3101_convert_sample_336(struct msi3101_state *s, u16 x) /* 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; @@ -699,12 +698,7 @@ static int msi3101_convert_stream_336(struct msi3101_state *s, u32 *dst, /* * 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; @@ -725,11 +719,6 @@ static u32 msi3101_convert_sample_252(struct msi3101_state *s, u16 x) /* 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; @@ -832,7 +821,7 @@ static void msi3101_isoc_handler(struct urb *urb) /* 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; @@ -856,14 +845,9 @@ static void msi3101_isoc_handler(struct urb *urb) } /* 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: ; @@ -1063,20 +1047,6 @@ static int msi3101_queue_setup(struct vb2_queue *vq, 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); @@ -1088,34 +1058,6 @@ static int msi3101_buf_prepare(struct vb2_buffer *vb) 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); @@ -1544,10 +1486,7 @@ static int msi3101_stop_streaming(struct vb2_queue *vq) 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, @@ -1862,7 +1801,7 @@ err_free_mem: /* 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 */ { } }; |