diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 1078 |
1 files changed, 552 insertions, 526 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 4abe6701a77..8996175cc95 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1,5 +1,6 @@ /* - em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices + em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB + video capture devices Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> Markus Rechberger <mrechberger@gmail.com> @@ -52,7 +53,19 @@ #define em28xx_videodbg(fmt, arg...) do {\ if (video_debug) \ printk(KERN_INFO "%s %s :"fmt, \ - dev->name, __FUNCTION__ , ##arg); } while (0) + dev->name, __func__ , ##arg); } while (0) + +static unsigned int isoc_debug; +module_param(isoc_debug, int, 0644); +MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); + +#define em28xx_isocdbg(fmt, arg...) \ +do {\ + if (isoc_debug) { \ + printk(KERN_INFO "%s %s :"fmt, \ + dev->name, __func__ , ##arg); \ + } \ + } while (0) MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); @@ -74,9 +87,9 @@ MODULE_PARM_DESC(video_nr, "video device numbers"); MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); MODULE_PARM_DESC(radio_nr, "radio device numbers"); -static unsigned int video_debug = 0; -module_param(video_debug,int,0644); -MODULE_PARM_DESC(video_debug,"enable debug messages [video]"); +static unsigned int video_debug; +module_param(video_debug, int, 0644); +MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */ static unsigned long em28xx_devused; @@ -93,7 +106,7 @@ static struct v4l2_queryctrl em28xx_qctrl[] = { .step = 0x1, .default_value = 0x1f, .flags = 0, - },{ + }, { .id = V4L2_CID_AUDIO_MUTE, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Mute", @@ -107,8 +120,391 @@ static struct v4l2_queryctrl em28xx_qctrl[] = { static struct usb_driver em28xx_usb_driver; +/* ------------------------------------------------------------------ + DMA and thread functions + ------------------------------------------------------------------*/ + +/* + * Announces that a buffer were filled and request the next + */ +static inline void buffer_filled(struct em28xx *dev, + struct em28xx_dmaqueue *dma_q, + struct em28xx_buffer *buf) +{ + /* Advice that buffer was filled */ + em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i); + buf->vb.state = VIDEOBUF_DONE; + buf->vb.field_count++; + do_gettimeofday(&buf->vb.ts); -/********************* v4l2 interface ******************************************/ + dev->isoc_ctl.buf = NULL; + + list_del(&buf->vb.queue); + wake_up(&buf->vb.done); +} + +/* + * Identify the buffer header type and properly handles + */ +static void em28xx_copy_video(struct em28xx *dev, + struct em28xx_dmaqueue *dma_q, + struct em28xx_buffer *buf, + unsigned char *p, + unsigned char *outp, unsigned long len) +{ + void *fieldstart, *startwrite, *startread; + int linesdone, currlinedone, offset, lencopy, remain; + int bytesperline = dev->width << 1; + + if (dma_q->pos + len > buf->vb.size) + len = buf->vb.size - dma_q->pos; + + if (p[0] != 0x88 && p[0] != 0x22) { + em28xx_isocdbg("frame is not complete\n"); + len += 4; + } else + p += 4; + + startread = p; + remain = len; + + /* Interlaces frame */ + if (buf->top_field) + fieldstart = outp; + else + fieldstart = outp + bytesperline; + + linesdone = dma_q->pos / bytesperline; + currlinedone = dma_q->pos % bytesperline; + offset = linesdone * bytesperline * 2 + currlinedone; + startwrite = fieldstart + offset; + lencopy = bytesperline - currlinedone; + lencopy = lencopy > remain ? remain : lencopy; + + if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { + em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n", + ((char *)startwrite + lencopy) - + ((char *)outp + buf->vb.size)); + lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite; + } + if (lencopy <= 0) + return; + memcpy(startwrite, startread, lencopy); + + remain -= lencopy; + + while (remain > 0) { + startwrite += lencopy + bytesperline; + startread += lencopy; + if (bytesperline > remain) + lencopy = remain; + else + lencopy = bytesperline; + + if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) { + em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n", + ((char *)startwrite + lencopy) - + ((char *)outp + buf->vb.size)); + lencopy = remain = (char *)outp + buf->vb.size - + (char *)startwrite; + } + if (lencopy <= 0) + break; + + memcpy(startwrite, startread, lencopy); + + remain -= lencopy; + } + + dma_q->pos += len; +} + +static inline void print_err_status(struct em28xx *dev, + int packet, int status) +{ + char *errmsg = "Unknown"; + + switch (status) { + case -ENOENT: + errmsg = "unlinked synchronuously"; + break; + case -ECONNRESET: + errmsg = "unlinked asynchronuously"; + break; + case -ENOSR: + errmsg = "Buffer error (overrun)"; + break; + case -EPIPE: + errmsg = "Stalled (device not responding)"; + break; + case -EOVERFLOW: + errmsg = "Babble (bad cable?)"; + break; + case -EPROTO: + errmsg = "Bit-stuff error (bad cable?)"; + break; + case -EILSEQ: + errmsg = "CRC/Timeout (could be anything)"; + break; + case -ETIME: + errmsg = "Device does not respond"; + break; + } + if (packet < 0) { + em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); + } else { + em28xx_isocdbg("URB packet %d, status %d [%s].\n", + packet, status, errmsg); + } +} + +/* + * video-buf generic routine to get the next available buffer + */ +static inline void get_next_buf(struct em28xx_dmaqueue *dma_q, + struct em28xx_buffer **buf) +{ + struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); + char *outp; + + if (list_empty(&dma_q->active)) { + em28xx_isocdbg("No active queue to serve\n"); + dev->isoc_ctl.buf = NULL; + *buf = NULL; + return; + } + + /* Get the next buffer */ + *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue); + + /* Cleans up buffer - Usefull for testing for frame/URB loss */ + outp = videobuf_to_vmalloc(&(*buf)->vb); + memset(outp, 0, (*buf)->vb.size); + + dev->isoc_ctl.buf = *buf; + + return; +} + +/* + * Controls the isoc copy of each urb packet + */ +static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb) +{ + struct em28xx_buffer *buf; + struct em28xx_dmaqueue *dma_q = urb->context; + unsigned char *outp = NULL; + int i, len = 0, rc = 1; + unsigned char *p; + + if (!dev) + return 0; + + if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) + return 0; + + if (urb->status < 0) { + print_err_status(dev, -1, urb->status); + if (urb->status == -ENOENT) + return 0; + } + + buf = dev->isoc_ctl.buf; + if (buf != NULL) + outp = videobuf_to_vmalloc(&buf->vb); + + for (i = 0; i < urb->number_of_packets; i++) { + int status = urb->iso_frame_desc[i].status; + + if (status < 0) { + print_err_status(dev, i, status); + if (urb->iso_frame_desc[i].status != -EPROTO) + continue; + } + + len = urb->iso_frame_desc[i].actual_length - 4; + + if (urb->iso_frame_desc[i].actual_length <= 0) { + /* em28xx_isocdbg("packet %d is empty",i); - spammy */ + continue; + } + if (urb->iso_frame_desc[i].actual_length > + dev->max_pkt_size) { + em28xx_isocdbg("packet bigger than packet size"); + continue; + } + + p = urb->transfer_buffer + urb->iso_frame_desc[i].offset; + + /* FIXME: incomplete buffer checks where removed to make + logic simpler. Impacts of those changes should be evaluated + */ + if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) { + em28xx_isocdbg("VBI HEADER!!!\n"); + /* FIXME: Should add vbi copy */ + continue; + } + if (p[0] == 0x22 && p[1] == 0x5a) { + em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], + len, (p[2] & 1)? "odd" : "even"); + + if (!(p[2] & 1)) { + if (buf != NULL) + buffer_filled(dev, dma_q, buf); + get_next_buf(dma_q, &buf); + if (buf == NULL) + outp = NULL; + else + outp = videobuf_to_vmalloc(&buf->vb); + } + + if (buf != NULL) { + if (p[2] & 1) + buf->top_field = 0; + else + buf->top_field = 1; + } + + dma_q->pos = 0; + } + if (buf != NULL) + em28xx_copy_video(dev, dma_q, buf, p, outp, len); + } + return rc; +} + +/* ------------------------------------------------------------------ + Videobuf operations + ------------------------------------------------------------------*/ + +static int +buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) +{ + struct em28xx_fh *fh = vq->priv_data; + struct em28xx *dev = fh->dev; + struct v4l2_frequency f; + + *size = 16 * fh->dev->width * fh->dev->height >> 3; + if (0 == *count) + *count = EM28XX_DEF_BUF; + + if (*count < EM28XX_MIN_BUF) + *count = EM28XX_MIN_BUF; + + /* Ask tuner to go to analog mode */ + memset(&f, 0, sizeof(f)); + f.frequency = dev->ctl_freq; + + em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f); + + return 0; +} + +/* This is called *without* dev->slock held; please keep it that way */ +static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) +{ + struct em28xx_fh *fh = vq->priv_data; + struct em28xx *dev = fh->dev; + unsigned long flags = 0; + if (in_interrupt()) + BUG(); + + /* We used to wait for the buffer to finish here, but this didn't work + because, as we were keeping the state as VIDEOBUF_QUEUED, + videobuf_queue_cancel marked it as finished for us. + (Also, it could wedge forever if the hardware was misconfigured.) + + This should be safe; by the time we get here, the buffer isn't + queued anymore. If we ever start marking the buffers as + VIDEOBUF_ACTIVE, it won't be, though. + */ + spin_lock_irqsave(&dev->slock, flags); + if (dev->isoc_ctl.buf == buf) + dev->isoc_ctl.buf = NULL; + spin_unlock_irqrestore(&dev->slock, flags); + + videobuf_vmalloc_free(&buf->vb); + buf->vb.state = VIDEOBUF_NEEDS_INIT; +} + +static int +buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, + enum v4l2_field field) +{ + struct em28xx_fh *fh = vq->priv_data; + struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); + struct em28xx *dev = fh->dev; + int rc = 0, urb_init = 0; + + /* FIXME: It assumes depth = 16 */ + /* The only currently supported format is 16 bits/pixel */ + buf->vb.size = 16 * dev->width * dev->height >> 3; + + if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) + return -EINVAL; + + buf->vb.width = dev->width; + buf->vb.height = dev->height; + buf->vb.field = field; + + if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { + rc = videobuf_iolock(vq, &buf->vb, NULL); + if (rc < 0) + goto fail; + } + + if (!dev->isoc_ctl.num_bufs) + urb_init = 1; + + if (urb_init) { + rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS, + EM28XX_NUM_BUFS, dev->max_pkt_size, + em28xx_isoc_copy); + if (rc < 0) + goto fail; + } + + buf->vb.state = VIDEOBUF_PREPARED; + return 0; + +fail: + free_buffer(vq, buf); + return rc; +} + +static void +buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) +{ + struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); + struct em28xx_fh *fh = vq->priv_data; + struct em28xx *dev = fh->dev; + struct em28xx_dmaqueue *vidq = &dev->vidq; + + buf->vb.state = VIDEOBUF_QUEUED; + list_add_tail(&buf->vb.queue, &vidq->active); + +} + +static void buffer_release(struct videobuf_queue *vq, + struct videobuf_buffer *vb) +{ + struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); + struct em28xx_fh *fh = vq->priv_data; + struct em28xx *dev = (struct em28xx *)fh->dev; + + em28xx_isocdbg("em28xx: called buffer_release\n"); + + free_buffer(vq, buf); +} + +static struct videobuf_queue_ops em28xx_video_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, +}; + +/********************* v4l2 interface **************************************/ /* * em28xx_config() @@ -123,9 +519,9 @@ static int em28xx_config(struct em28xx *dev) /* enable vbi capturing */ -/* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */ -/* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */ - em28xx_write_regs_req(dev,0x00,0x11,"\x51",1); +/* em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */ +/* em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */ + em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1); dev->mute = 1; /* maybe not the right place... */ dev->volume = 0x1f; @@ -152,23 +548,6 @@ static void em28xx_config_i2c(struct em28xx *dev) em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL); } -/* - * em28xx_empty_framequeues() - * prepare queues for incoming and outgoing frames - */ -static void em28xx_empty_framequeues(struct em28xx *dev) -{ - u32 i; - - INIT_LIST_HEAD(&dev->inqueue); - INIT_LIST_HEAD(&dev->outqueue); - - for (i = 0; i < EM28XX_NUM_FRAMES; i++) { - dev->frame[i].state = F_UNUSED; - dev->frame[i].buf.bytesused = 0; - } -} - static void video_mux(struct em28xx *dev, int index) { struct v4l2_routing route; @@ -181,12 +560,15 @@ static void video_mux(struct em28xx *dev, int index) em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); if (dev->has_msp34xx) { - if (dev->i2s_speed) - em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed); + if (dev->i2s_speed) { + em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, + &dev->i2s_speed); + } route.input = dev->ctl_ainput; route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); /* Note: this is msp3400 specific */ - em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route); + em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, + &route); } em28xx_audio_analog_set(dev); @@ -202,15 +584,12 @@ static int res_get(struct em28xx_fh *fh) if (fh->stream_on) return rc; - mutex_lock(&dev->lock); - if (dev->stream_on) - rc = -EINVAL; - else { - dev->stream_on = 1; - fh->stream_on = 1; - } + return -EINVAL; + mutex_lock(&dev->lock); + dev->stream_on = 1; + fh->stream_on = 1; mutex_unlock(&dev->lock); return rc; } @@ -231,33 +610,6 @@ static void res_free(struct em28xx_fh *fh) } /* - * em28xx_vm_open() - */ -static void em28xx_vm_open(struct vm_area_struct *vma) -{ - struct em28xx_frame_t *f = vma->vm_private_data; - f->vma_use_count++; -} - -/* - * em28xx_vm_close() - */ -static void em28xx_vm_close(struct vm_area_struct *vma) -{ - /* NOTE: buffers are not freed here */ - struct em28xx_frame_t *f = vma->vm_private_data; - - if (f->vma_use_count) - f->vma_use_count--; -} - -static struct vm_operations_struct em28xx_vm_ops = { - .open = em28xx_vm_open, - .close = em28xx_vm_close, -}; - - -/* * em28xx_get_ctrl() * return the current saturation, brightness or contrast, mute state */ @@ -296,34 +648,6 @@ static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) } } -/* - * em28xx_stream_interrupt() - * stops streaming - */ -static int em28xx_stream_interrupt(struct em28xx *dev) -{ - int rc = 0; - - /* stop reading from the device */ - - dev->stream = STREAM_INTERRUPT; - rc = wait_event_timeout(dev->wait_stream, - (dev->stream == STREAM_OFF) || - (dev->state & DEV_DISCONNECTED), - EM28XX_URB_TIMEOUT); - - if (rc) { - dev->state |= DEV_MISCONFIGURED; - em28xx_videodbg("device is misconfigured; close and " - "open /dev/video%d again\n", - dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); - return rc; - } - - return 0; -} - - static int check_dev(struct em28xx *dev) { if (dev->state & DEV_DISCONNECTED) { @@ -370,8 +694,8 @@ static int vidioc_g_fmt_cap(struct file *file, void *priv, f->fmt.pix.width = dev->width; f->fmt.pix.height = dev->height; f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; - f->fmt.pix.bytesperline = dev->bytesperline; - f->fmt.pix.sizeimage = dev->frame_size; + f->fmt.pix.bytesperline = dev->width * 2; + f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height; f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ @@ -447,7 +771,7 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv, { struct em28xx_fh *fh = priv; struct em28xx *dev = fh->dev; - int rc, i; + int rc; rc = check_dev(dev); if (rc < 0) @@ -457,49 +781,34 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv, mutex_lock(&dev->lock); - for (i = 0; i < dev->num_frames; i++) - if (dev->frame[i].vma_use_count) { - em28xx_videodbg("VIDIOC_S_FMT failed. " - "Unmap the buffers first.\n"); - rc = -EINVAL; - goto err; - } - - /* stop io in case it is already in progress */ - if (dev->stream == STREAM_ON) { - em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n"); - rc = em28xx_stream_interrupt(dev); - if (rc < 0) - goto err; + if (videobuf_queue_is_busy(&fh->vb_vidq)) { + em28xx_errdev("%s queue busy\n", __func__); + rc = -EBUSY; + goto out; } - em28xx_release_buffers(dev); - dev->io = IO_NONE; + if (dev->stream_on && !fh->stream_on) { + em28xx_errdev("%s device in use by another fh\n", __func__); + rc = -EBUSY; + goto out; + } /* set new image size */ dev->width = f->fmt.pix.width; dev->height = f->fmt.pix.height; - dev->frame_size = dev->width * dev->height * 2; - dev->field_size = dev->frame_size >> 1; - dev->bytesperline = dev->width * 2; get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); - /* FIXME: This is really weird! Why capture is starting with - this ioctl ??? - */ - em28xx_uninit_isoc(dev); em28xx_set_alternate(dev); - em28xx_capture_start(dev, 1); em28xx_resolution_set(dev); - em28xx_init_isoc(dev); + rc = 0; -err: +out: mutex_unlock(&dev->lock); return rc; } -static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm) +static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm) { struct em28xx_fh *fh = priv; struct em28xx *dev = fh->dev; @@ -524,9 +833,6 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm) /* set new image size */ dev->width = f.fmt.pix.width; dev->height = f.fmt.pix.height; - dev->frame_size = dev->width * dev->height * 2; - dev->field_size = dev->frame_size >> 1; - dev->bytesperline = dev->width * 2; get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale); em28xx_resolution_set(dev); @@ -619,11 +925,11 @@ static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) index = dev->ctl_ainput; - if (index == 0) { + if (index == 0) strcpy(a->name, "Television"); - } else { + else strcpy(a->name, "Line In"); - } + a->capability = V4L2_AUDCAP_STEREO; a->index = index; @@ -834,9 +1140,9 @@ static int vidioc_s_frequency(struct file *file, void *priv, static int em28xx_reg_len(int reg) { switch (reg) { - case AC97LSB_REG: - case HSCALELOW_REG: - case VSCALELOW_REG: + case EM28XX_R40_AC97LSB: + case EM28XX_R30_HSCALELOW: + case EM28XX_R32_VSCALELOW: return 2; default: return 1; @@ -918,23 +1224,11 @@ static int vidioc_streamon(struct file *file, void *priv, if (rc < 0) return rc; - if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP) - return -EINVAL; - - if (list_empty(&dev->inqueue)) - return -EINVAL; - - mutex_lock(&dev->lock); - if (unlikely(res_get(fh) < 0)) { - mutex_unlock(&dev->lock); + if (unlikely(res_get(fh) < 0)) return -EBUSY; - } - dev->stream = STREAM_ON; /* FIXME: Start video capture here? */ - - mutex_unlock(&dev->lock); - return 0; + return (videobuf_streamon(&fh->vb_vidq)); } static int vidioc_streamoff(struct file *file, void *priv, @@ -948,23 +1242,14 @@ static int vidioc_streamoff(struct file *file, void *priv, if (rc < 0) return rc; - if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP) + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (type != fh->type) return -EINVAL; - mutex_lock(&dev->lock); - - if (dev->stream == STREAM_ON) { - em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n"); - rc = em28xx_stream_interrupt(dev); - if (rc < 0) { - mutex_unlock(&dev->lock); - return rc; - } - } - - em28xx_empty_framequeues(dev); + videobuf_streamoff(&fh->vb_vidq); + res_free(fh); - mutex_unlock(&dev->lock); return 0; } @@ -1058,53 +1343,13 @@ static int vidioc_reqbufs(struct file *file, void *priv, { struct em28xx_fh *fh = priv; struct em28xx *dev = fh->dev; - u32 i; int rc; rc = check_dev(dev); if (rc < 0) return rc; - if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || - rb->memory != V4L2_MEMORY_MMAP) - return -EINVAL; - - if (dev->io == IO_READ) { - em28xx_videodbg("method is set to read;" - " close and open the device again to" - " choose the mmap I/O method\n"); - return -EINVAL; - } - - for (i = 0; i < dev->num_frames; i++) - if (dev->frame[i].vma_use_count) { - em28xx_videodbg("VIDIOC_REQBUFS failed; " - "previous buffers are still mapped\n"); - return -EINVAL; - } - - mutex_lock(&dev->lock); - - if (dev->stream == STREAM_ON) { - em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n"); - rc = em28xx_stream_interrupt(dev); - if (rc < 0) { - mutex_unlock(&dev->lock); - return rc; - } - } - - em28xx_empty_framequeues(dev); - - em28xx_release_buffers(dev); - if (rb->count) - rb->count = em28xx_request_buffers(dev, rb->count); - - dev->frame_current = NULL; - dev->io = rb->count ? IO_MMAP : IO_NONE; - - mutex_unlock(&dev->lock); - return 0; + return (videobuf_reqbufs(&fh->vb_vidq, rb)); } static int vidioc_querybuf(struct file *file, void *priv, @@ -1118,52 +1363,20 @@ static int vidioc_querybuf(struct file *file, void *priv, if (rc < 0) return rc; - if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || - b->index >= dev->num_frames || dev->io != IO_MMAP) - return -EINVAL; - - mutex_lock(&dev->lock); - - memcpy(b, &dev->frame[b->index].buf, sizeof(*b)); - - if (dev->frame[b->index].vma_use_count) - b->flags |= V4L2_BUF_FLAG_MAPPED; - - if (dev->frame[b->index].state == F_DONE) - b->flags |= V4L2_BUF_FLAG_DONE; - else if (dev->frame[b->index].state != F_UNUSED) - b->flags |= V4L2_BUF_FLAG_QUEUED; - - mutex_unlock(&dev->lock); - return 0; + return (videobuf_querybuf(&fh->vb_vidq, b)); } static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) { struct em28xx_fh *fh = priv; struct em28xx *dev = fh->dev; - unsigned long lock_flags; int rc; rc = check_dev(dev); if (rc < 0) return rc; - if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP || - b->index >= dev->num_frames) - return -EINVAL; - - if (dev->frame[b->index].state != F_UNUSED) - return -EAGAIN; - - dev->frame[b->index].state = F_QUEUED; - - /* add frame to fifo */ - spin_lock_irqsave(&dev->queue_lock, lock_flags); - list_add_tail(&dev->frame[b->index].frame, &dev->inqueue); - spin_unlock_irqrestore(&dev->queue_lock, lock_flags); - - return 0; + return (videobuf_qbuf(&fh->vb_vidq, b)); } static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) @@ -1171,46 +1384,24 @@ static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) struct em28xx_fh *fh = priv; struct em28xx *dev = fh->dev; int rc; - struct em28xx_frame_t *f; - unsigned long lock_flags; rc = check_dev(dev); if (rc < 0) return rc; - if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP) - return -EINVAL; - - if (list_empty(&dev->outqueue)) { - if (dev->stream == STREAM_OFF) - return -EINVAL; - - if (file->f_flags & O_NONBLOCK) - return -EAGAIN; - - rc = wait_event_interruptible(dev->wait_frame, - (!list_empty(&dev->outqueue)) || - (dev->state & DEV_DISCONNECTED)); - if (rc) - return rc; - - if (dev->state & DEV_DISCONNECTED) - return -ENODEV; - } - - spin_lock_irqsave(&dev->queue_lock, lock_flags); - f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame); - list_del(dev->outqueue.next); - spin_unlock_irqrestore(&dev->queue_lock, lock_flags); - - f->state = F_UNUSED; - memcpy(b, &f->buf, sizeof(*b)); + return (videobuf_dqbuf(&fh->vb_vidq, b, + file->f_flags & O_NONBLOCK)); +} - if (f->vma_use_count) - b->flags |= V4L2_BUF_FLAG_MAPPED; +#ifdef CONFIG_VIDEO_V4L1_COMPAT +static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf) +{ + struct em28xx_fh *fh = priv; - return 0; + return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8); } +#endif + /* ----------------------------------------------------------- */ /* RADIO ESPECIFIC IOCTLS */ @@ -1316,17 +1507,18 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) { int minor = iminor(inode); int errCode = 0, radio = 0; - struct em28xx *h,*dev = NULL; + struct em28xx *h, *dev = NULL; struct em28xx_fh *fh; + enum v4l2_buf_type fh_type = 0; list_for_each_entry(h, &em28xx_devlist, devlist) { if (h->vdev->minor == minor) { dev = h; - dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; } if (h->vbi_dev->minor == minor) { dev = h; - dev->type = V4L2_BUF_TYPE_VBI_CAPTURE; + fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; } if (h->radio_dev && h->radio_dev->minor == minor) { @@ -1338,10 +1530,10 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) return -ENODEV; em28xx_videodbg("open minor=%d type=%s users=%d\n", - minor,v4l2_type_names[dev->type],dev->users); + minor, v4l2_type_names[fh_type], dev->users); - fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); + fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL); if (!fh) { em28xx_errdev("em28xx-video.c: Out of memory?!\n"); return -ENOMEM; @@ -1349,28 +1541,24 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) mutex_lock(&dev->lock); fh->dev = dev; fh->radio = radio; + fh->type = fh_type; filp->private_data = fh; - if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { + if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) { dev->width = norm_maxw(dev); dev->height = norm_maxh(dev); - dev->frame_size = dev->width * dev->height * 2; - dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ - dev->bytesperline = dev->width * 2; dev->hscale = 0; dev->vscale = 0; + em28xx_set_mode(dev, EM28XX_ANALOG_MODE); em28xx_set_alternate(dev); - em28xx_capture_start(dev, 1); em28xx_resolution_set(dev); + /* Needed, since GPIO might have disabled power of + some i2c device + */ + em28xx_config_i2c(dev); - /* start the transfer */ - errCode = em28xx_init_isoc(dev); - if (errCode) - goto err; - - em28xx_empty_framequeues(dev); } if (fh->radio) { em28xx_videodbg("video_open: setting radio device\n"); @@ -1379,8 +1567,12 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) dev->users++; -err: + videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops, + NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED, + sizeof(struct em28xx_buffer), fh); + mutex_unlock(&dev->lock); + return errCode; } @@ -1423,12 +1615,13 @@ static void em28xx_release_resources(struct em28xx *dev) usb_put_dev(dev->udev); /* Mark device as unused */ - em28xx_devused&=~(1<<dev->devno); + em28xx_devused &= ~(1<<dev->devno); } /* * em28xx_v4l2_close() - * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls + * stops streaming and deallocates all resources allocated by the v4l2 + * calls and ioctls */ static int em28xx_v4l2_close(struct inode *inode, struct file *filp) { @@ -1445,9 +1638,8 @@ static int em28xx_v4l2_close(struct inode *inode, struct file *filp) mutex_lock(&dev->lock); if (dev->users == 1) { - em28xx_uninit_isoc(dev); - em28xx_release_buffers(dev); - dev->io = IO_NONE; + videobuf_stop(&fh->vb_vidq); + videobuf_mmap_free(&fh->vb_vidq); /* the device is already disconnect, free the remaining resources */ @@ -1458,6 +1650,10 @@ static int em28xx_v4l2_close(struct inode *inode, struct file *filp) return 0; } + /* do this before setting alternate! */ + em28xx_uninit_isoc(dev); + em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED); + /* set alternate 0 */ dev->alt = 0; em28xx_videodbg("setting alternate 0\n"); @@ -1479,135 +1675,29 @@ static int em28xx_v4l2_close(struct inode *inode, struct file *filp) * will allocate buffers when called for the first time */ static ssize_t -em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count, - loff_t * f_pos) +em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count, + loff_t *pos) { - struct em28xx_frame_t *f, *i; - unsigned long lock_flags; - int ret = 0; struct em28xx_fh *fh = filp->private_data; struct em28xx *dev = fh->dev; + int rc; + + rc = check_dev(dev); + if (rc < 0) + return rc; /* FIXME: read() is not prepared to allow changing the video resolution while streaming. Seems a bug at em28xx_set_fmt */ - if (unlikely(res_get(fh) < 0)) - return -EBUSY; - - mutex_lock(&dev->lock); - - if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) - em28xx_videodbg("V4l2_Buf_type_videocapture is set\n"); + if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { + if (unlikely(res_get(fh))) + return -EBUSY; - if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) { - em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n"); - em28xx_videodbg("not supported yet! ...\n"); - if (copy_to_user(buf, "", 1)) { - mutex_unlock(&dev->lock); - return -EFAULT; - } - mutex_unlock(&dev->lock); - return (1); - } - if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) { - em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n"); - em28xx_videodbg("not supported yet! ...\n"); - if (copy_to_user(buf, "", 1)) { - mutex_unlock(&dev->lock); - return -EFAULT; - } - mutex_unlock(&dev->lock); - return (1); + return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0, + filp->f_flags & O_NONBLOCK); } - - if (dev->state & DEV_DISCONNECTED) { - em28xx_videodbg("device not present\n"); - mutex_unlock(&dev->lock); - return -ENODEV; - } - - if (dev->state & DEV_MISCONFIGURED) { - em28xx_videodbg("device misconfigured; close and open it again\n"); - mutex_unlock(&dev->lock); - return -EIO; - } - - if (dev->io == IO_MMAP) { - em28xx_videodbg ("IO method is set to mmap; close and open" - " the device again to choose the read method\n"); - mutex_unlock(&dev->lock); - return -EINVAL; - } - - if (dev->io == IO_NONE) { - if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) { - em28xx_errdev("read failed, not enough memory\n"); - mutex_unlock(&dev->lock); - return -ENOMEM; - } - dev->io = IO_READ; - dev->stream = STREAM_ON; - em28xx_queue_unusedframes(dev); - } - - if (!count) { - mutex_unlock(&dev->lock); - return 0; - } - - if (list_empty(&dev->outqueue)) { - if (filp->f_flags & O_NONBLOCK) { - mutex_unlock(&dev->lock); - return -EAGAIN; - } - ret = wait_event_interruptible - (dev->wait_frame, - (!list_empty(&dev->outqueue)) || - (dev->state & DEV_DISCONNECTED)); - if (ret) { - mutex_unlock(&dev->lock); - return ret; - } - if (dev->state & DEV_DISCONNECTED) { - mutex_unlock(&dev->lock); - return -ENODEV; - } - dev->video_bytesread = 0; - } - - f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame); - - em28xx_queue_unusedframes(dev); - - if (count > f->buf.length) - count = f->buf.length; - - if ((dev->video_bytesread + count) > dev->frame_size) - count = dev->frame_size - dev->video_bytesread; - - if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) { - em28xx_err("Error while copying to user\n"); - return -EFAULT; - } - dev->video_bytesread += count; - - if (dev->video_bytesread == dev->frame_size) { - spin_lock_irqsave(&dev->queue_lock, lock_flags); - list_for_each_entry(i, &dev->outqueue, frame) - i->state = F_UNUSED; - INIT_LIST_HEAD(&dev->outqueue); - spin_unlock_irqrestore(&dev->queue_lock, lock_flags); - - em28xx_queue_unusedframes(dev); - dev->video_bytesread = 0; - } - - *f_pos += count; - - mutex_unlock(&dev->lock); - - return count; + return 0; } /* @@ -1616,46 +1706,21 @@ em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count, */ static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait) { - unsigned int mask = 0; struct em28xx_fh *fh = filp->private_data; struct em28xx *dev = fh->dev; + int rc; + + rc = check_dev(dev); + if (rc < 0) + return rc; if (unlikely(res_get(fh) < 0)) return POLLERR; - mutex_lock(&dev->lock); - - if (dev->state & DEV_DISCONNECTED) { - em28xx_videodbg("device not present\n"); - } else if (dev->state & DEV_MISCONFIGURED) { - em28xx_videodbg("device is misconfigured; close and open it again\n"); - } else { - if (dev->io == IO_NONE) { - if (!em28xx_request_buffers - (dev, EM28XX_NUM_READ_FRAMES)) { - em28xx_warn - ("poll() failed, not enough memory\n"); - } else { - dev->io = IO_READ; - dev->stream = STREAM_ON; - } - } - - if (dev->io == IO_READ) { - em28xx_queue_unusedframes(dev); - poll_wait(filp, &dev->wait_frame, wait); - - if (!list_empty(&dev->outqueue)) - mask |= POLLIN | POLLRDNORM; - - mutex_unlock(&dev->lock); - - return mask; - } - } + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) + return POLLERR; - mutex_unlock(&dev->lock); - return POLLERR; + return videobuf_poll_stream(filp, &fh->vb_vidq, wait); } /* @@ -1665,69 +1730,23 @@ static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) { struct em28xx_fh *fh = filp->private_data; struct em28xx *dev = fh->dev; - unsigned long size = vma->vm_end - vma->vm_start; - unsigned long start = vma->vm_start; - void *pos; - u32 i; + int rc; if (unlikely(res_get(fh) < 0)) return -EBUSY; - mutex_lock(&dev->lock); - - if (dev->state & DEV_DISCONNECTED) { - em28xx_videodbg("mmap: device not present\n"); - mutex_unlock(&dev->lock); - return -ENODEV; - } - - if (dev->state & DEV_MISCONFIGURED) { - em28xx_videodbg ("mmap: Device is misconfigured; close and " - "open it again\n"); - mutex_unlock(&dev->lock); - return -EIO; - } - - if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) { - mutex_unlock(&dev->lock); - return -EINVAL; - } - - if (size > PAGE_ALIGN(dev->frame[0].buf.length)) - size = PAGE_ALIGN(dev->frame[0].buf.length); - - for (i = 0; i < dev->num_frames; i++) { - if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) - break; - } - if (i == dev->num_frames) { - em28xx_videodbg("mmap: user supplied mapping address is out of range\n"); - mutex_unlock(&dev->lock); - return -EINVAL; - } - - /* VM_IO is eventually going to replace PageReserved altogether */ - vma->vm_flags |= VM_IO; - vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ + rc = check_dev(dev); + if (rc < 0) + return rc; - pos = dev->frame[i].bufmem; - while (size > 0) { /* size is page-aligned */ - if (vm_insert_page(vma, start, vmalloc_to_page(pos))) { - em28xx_videodbg("mmap: vm_insert_page failed\n"); - mutex_unlock(&dev->lock); - return -EAGAIN; - } - start += PAGE_SIZE; - pos += PAGE_SIZE; - size -= PAGE_SIZE; - } + rc = videobuf_mmap_mapper(&fh->vb_vidq, vma); - vma->vm_ops = &em28xx_vm_ops; - vma->vm_private_data = &dev->frame[i]; + em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n", + (unsigned long)vma->vm_start, + (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, + rc); - em28xx_vm_open(vma); - mutex_unlock(&dev->lock); - return 0; + return rc; } static const struct file_operations em28xx_v4l_fops = { @@ -1790,6 +1809,9 @@ static const struct video_device em28xx_video_template = { .vidioc_g_register = vidioc_g_register, .vidioc_s_register = vidioc_s_register, #endif +#ifdef CONFIG_VIDEO_V4L1_COMPAT + .vidiocgmbuf = vidiocgmbuf, +#endif .tvnorms = V4L2_STD_ALL, .current_norm = V4L2_STD_PAL, @@ -1818,7 +1840,7 @@ static struct video_device em28xx_radio_template = { #endif }; -/******************************** usb interface *****************************************/ +/******************************** usb interface ******************************/ static LIST_HEAD(em28xx_extension_devlist); @@ -1875,6 +1897,7 @@ static struct video_device *em28xx_vdev_init(struct em28xx *dev, vfd->dev = &dev->udev->dev; vfd->release = video_device_release; vfd->type = type; + vfd->debug = video_debug; snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name); @@ -1898,7 +1921,7 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, dev->udev = udev; mutex_init(&dev->lock); - spin_lock_init(&dev->queue_lock); + spin_lock_init(&dev->slock); init_waitqueue_head(&dev->open); init_waitqueue_head(&dev->wait_frame); init_waitqueue_head(&dev->wait_stream); @@ -1910,10 +1933,6 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, dev->em28xx_read_reg_req = em28xx_read_reg_req; dev->is_em2800 = em28xx_boards[dev->model].is_em2800; - errCode = em28xx_read_reg(dev, CHIPID_REG); - if (errCode >= 0) - em28xx_info("em28xx chip ID = %d\n", errCode); - em28xx_pre_card_setup(dev); errCode = em28xx_config(dev); @@ -1946,10 +1965,6 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, dev->width = maxw; dev->height = maxh; dev->interlaced = EM28XX_INTERLACED_DEFAULT; - dev->field_size = dev->width * dev->height; - dev->frame_size = - dev->interlaced ? dev->field_size << 1 : dev->field_size; - dev->bytesperline = dev->width * 2; dev->hscale = 0; dev->vscale = 0; dev->ctl_input = 2; @@ -2005,6 +2020,10 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, dev->radio_dev->minor & 0x1f); } + /* init video dma queues */ + INIT_LIST_HEAD(&dev->vidq.active); + INIT_LIST_HEAD(&dev->vidq.queued); + if (dev->has_msp34xx) { /* Send a reset to other chips via gpio */ @@ -2048,6 +2067,9 @@ static void request_module_async(struct work_struct *work) request_module("snd-usb-audio"); else request_module("em28xx-alsa"); + + if (dev->has_dvb) + request_module("em28xx-dvb"); } static void request_modules(struct em28xx *dev) @@ -2077,22 +2099,24 @@ static int em28xx_usb_probe(struct usb_interface *interface, ifnum = interface->altsetting[0].desc.bInterfaceNumber; /* Check to see next free device and mark as used */ - nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS); - em28xx_devused|=1<<nr; + nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS); + em28xx_devused |= 1<<nr; /* Don't register audio interfaces */ if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n", - udev->descriptor.idVendor,udev->descriptor.idProduct, + udev->descriptor.idVendor, + udev->descriptor.idProduct, ifnum, interface->altsetting[0].desc.bInterfaceClass); - em28xx_devused&=~(1<<nr); + em28xx_devused &= ~(1<<nr); return -ENODEV; } em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n", - udev->descriptor.idVendor,udev->descriptor.idProduct, + udev->descriptor.idVendor, + udev->descriptor.idProduct, ifnum, interface->altsetting[0].desc.bInterfaceClass); @@ -2102,18 +2126,19 @@ static int em28xx_usb_probe(struct usb_interface *interface, if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC) { em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); - em28xx_devused&=~(1<<nr); + em28xx_devused &= ~(1<<nr); return -ENODEV; } if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); - em28xx_devused&=~(1<<nr); + em28xx_devused &= ~(1<<nr); return -ENODEV; } if (nr >= EM28XX_MAXBOARDS) { - printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS); - em28xx_devused&=~(1<<nr); + printk(DRIVER_NAME ": Supports only %i em28xx boards.\n", + EM28XX_MAXBOARDS); + em28xx_devused &= ~(1<<nr); return -ENOMEM; } @@ -2121,7 +2146,7 @@ static int em28xx_usb_probe(struct usb_interface *interface, dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) { em28xx_err(DRIVER_NAME ": out of memory!\n"); - em28xx_devused&=~(1<<nr); + em28xx_devused &= ~(1<<nr); return -ENOMEM; } @@ -2145,14 +2170,14 @@ static int em28xx_usb_probe(struct usb_interface *interface, /* compute alternate max packet sizes */ uif = udev->actconfig->interface[0]; - dev->num_alt=uif->num_altsetting; - em28xx_info("Alternate settings: %i\n",dev->num_alt); -// dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* - dev->alt_max_pkt_size = kmalloc(32* - dev->num_alt,GFP_KERNEL); + dev->num_alt = uif->num_altsetting; + em28xx_info("Alternate settings: %i\n", dev->num_alt); +/* dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */ + dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL); + if (dev->alt_max_pkt_size == NULL) { em28xx_errdev("out of memory!\n"); - em28xx_devused&=~(1<<nr); + em28xx_devused &= ~(1<<nr); kfree(dev); return -ENOMEM; } @@ -2162,11 +2187,11 @@ static int em28xx_usb_probe(struct usb_interface *interface, wMaxPacketSize); dev->alt_max_pkt_size[i] = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); - em28xx_info("Alternate setting %i, max size= %i\n",i, - dev->alt_max_pkt_size[i]); + em28xx_info("Alternate setting %i, max size= %i\n", i, + dev->alt_max_pkt_size[i]); } - if ((card[nr]>=0)&&(card[nr]<em28xx_bcount)) + if ((card[nr] >= 0) && (card[nr] < em28xx_bcount)) dev->model = card[nr]; /* allocate device struct */ @@ -2202,7 +2227,8 @@ static void em28xx_usb_disconnect(struct usb_interface *interface) em28xx_info("disconnecting %s\n", dev->vdev->name); - /* wait until all current v4l2 io is finished then deallocate resources */ + /* wait until all current v4l2 io is finished then deallocate + resources */ mutex_lock(&dev->lock); wake_up_interruptible_all(&dev->open); 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