diff options
Diffstat (limited to 'drivers/staging/tm6000/tm6000-video.c')
| -rw-r--r-- | drivers/staging/tm6000/tm6000-video.c | 1557 |
1 files changed, 1557 insertions, 0 deletions
diff --git a/drivers/staging/tm6000/tm6000-video.c b/drivers/staging/tm6000/tm6000-video.c new file mode 100644 index 000000000000..f2b7fe4a3581 --- /dev/null +++ b/drivers/staging/tm6000/tm6000-video.c @@ -0,0 +1,1557 @@ +/* + tm6000-video.c - driver for TM5600/TM6000/TM6010 USB video capture devices + + Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org> + + Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com> + - Fixed module load/unload + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation version 2 + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/random.h> +#include <linux/version.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <media/v4l2-ioctl.h> +#include <linux/interrupt.h> +#include <linux/kthread.h> +#include <linux/highmem.h> +#include <linux/freezer.h> + +#include "tm6000-regs.h" +#include "tm6000.h" + +#define BUFFER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */ + +/* Limits minimum and default number of buffers */ +#define TM6000_MIN_BUF 4 +#define TM6000_DEF_BUF 8 + +#define TM6000_MAX_ISO_PACKETS 40 /* Max number of ISO packets */ + +/* Declare static vars that will be used as parameters */ +static unsigned int vid_limit = 16; /* Video memory limit, in Mb */ +static int video_nr = -1; /* /dev/videoN, -1 for autodetect */ + +/* Debug level */ +int tm6000_debug; + +/* supported controls */ +static struct v4l2_queryctrl tm6000_qctrl[] = { + { + .id = V4L2_CID_BRIGHTNESS, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Brightness", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = 54, + .flags = 0, + }, { + .id = V4L2_CID_CONTRAST, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Contrast", + .minimum = 0, + .maximum = 255, + .step = 0x1, + .default_value = 119, + .flags = 0, + }, { + .id = V4L2_CID_SATURATION, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Saturation", + .minimum = 0, + .maximum = 255, + .step = 0x1, + .default_value = 112, + .flags = 0, + }, { + .id = V4L2_CID_HUE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Hue", + .minimum = -128, + .maximum = 127, + .step = 0x1, + .default_value = 0, + .flags = 0, + } +}; + +static int qctl_regs[ARRAY_SIZE(tm6000_qctrl)]; + +static struct tm6000_fmt format[] = { + { + .name = "4:2:2, packed, YVY2", + .fourcc = V4L2_PIX_FMT_YUYV, + .depth = 16, + }, { + .name = "4:2:2, packed, UYVY", + .fourcc = V4L2_PIX_FMT_UYVY, + .depth = 16, + }, { + .name = "A/V + VBI mux packet", + .fourcc = V4L2_PIX_FMT_TM6000, + .depth = 16, + } +}; + +/* ------------------------------------------------------------------ + DMA and thread functions + ------------------------------------------------------------------*/ + +#define norm_maxw(a) 720 +#define norm_maxh(a) 576 + +#define norm_minw(a) norm_maxw(a) +#define norm_minh(a) norm_maxh(a) + +/* + * video-buf generic routine to get the next available buffer + */ +static inline void get_next_buf(struct tm6000_dmaqueue *dma_q, + struct tm6000_buffer **buf) +{ + struct tm6000_core *dev = container_of(dma_q, struct tm6000_core, vidq); + char *outp; + + if (list_empty(&dma_q->active)) { + dprintk(dev, V4L2_DEBUG_QUEUE, "No active queue to serve\n"); + *buf = NULL; + return; + } + + *buf = list_entry(dma_q->active.next, + struct tm6000_buffer, vb.queue); + + if (!buf) + return; + + /* Cleans up buffer - Usefull for testing for frame/URB loss */ + outp = videobuf_to_vmalloc(&(*buf)->vb); +// if (outp) +// memset(outp, 0, (*buf)->vb.size); + + return; +} + +/* + * Announces that a buffer were filled and request the next + */ +static inline void buffer_filled(struct tm6000_core *dev, + struct tm6000_dmaqueue *dma_q, + struct tm6000_buffer *buf) +{ + /* Advice that buffer was filled */ + dprintk(dev, V4L2_DEBUG_ISOC, "[%p/%d] wakeup\n", buf, buf->vb.i); + buf->vb.state = VIDEOBUF_DONE; + buf->vb.field_count++; + do_gettimeofday(&buf->vb.ts); + + list_del(&buf->vb.queue); + wake_up(&buf->vb.done); +} + +const char *tm6000_msg_type[] = { + "unknown(0)", /* 0 */ + "video", /* 1 */ + "audio", /* 2 */ + "vbi", /* 3 */ + "pts", /* 4 */ + "err", /* 5 */ + "unknown(6)", /* 6 */ + "unknown(7)", /* 7 */ +}; + +/* + * Identify the tm5600/6000 buffer header type and properly handles + */ +static int copy_packet(struct urb *urb, u32 header, u8 **ptr, u8 *endp, + u8 *out_p, struct tm6000_buffer **buf) +{ + struct tm6000_dmaqueue *dma_q = urb->context; + struct tm6000_core *dev = container_of(dma_q, struct tm6000_core, vidq); + u8 c; + unsigned int cmd, cpysize, pktsize, size, field, block, line, pos = 0; + int rc = 0; + /* FIXME: move to tm6000-isoc */ + static int last_line = -2, start_line = -2, last_field = -2; + + /* FIXME: this is the hardcoded window size + */ + unsigned int linewidth = (*buf)->vb.width << 1; + + if (!dev->isoc_ctl.cmd) { + c = (header >> 24) & 0xff; + + /* split the header fields */ + size = (((header & 0x7e) << 1) -1) *4; + block = (header >> 7) & 0xf; + field = (header >> 11) & 0x1; + line = (header >> 12) & 0x1ff; + cmd = (header >> 21) & 0x7; + + /* Validates header fields */ + if(size > TM6000_URB_MSG_LEN) + size = TM6000_URB_MSG_LEN; + + if (cmd == TM6000_URB_MSG_VIDEO) { + if ((block+1)*TM6000_URB_MSG_LEN>linewidth) + cmd = TM6000_URB_MSG_ERR; + + /* FIXME: Mounts the image as field0+field1 + * It should, instead, check if the user selected + * entrelaced or non-entrelaced mode + */ + pos = ((line << 1) - field - 1) * linewidth + + block * TM6000_URB_MSG_LEN; + + /* Don't allow to write out of the buffer */ + if (pos+TM6000_URB_MSG_LEN > (*buf)->vb.size) { + dprintk(dev, V4L2_DEBUG_ISOC, + "ERR: size=%d, num=%d, line=%d, " + "field=%d\n", + size, block, line, field); + + cmd = TM6000_URB_MSG_ERR; + } + } else { + pos=0; + } + + /* Prints debug info */ + dprintk(dev, V4L2_DEBUG_ISOC, "size=%d, num=%d, " + " line=%d, field=%d\n", + size, block, line, field); + + if ((last_line!=line)&&(last_line+1!=line) && + (cmd != TM6000_URB_MSG_ERR) ) { + if (cmd != TM6000_URB_MSG_VIDEO) { + dprintk(dev, V4L2_DEBUG_ISOC, "cmd=%d, " + "size=%d, num=%d, line=%d, field=%d\n", + cmd, size, block, line, field); + } + if (start_line<0) + start_line=last_line; + /* Prints debug info */ + dprintk(dev, V4L2_DEBUG_ISOC, "lines= %d-%d, " + "field=%d\n", + start_line, last_line, field); + + if ((start_line<6 && last_line>200) && + (last_field != field) ) { + + dev->isoc_ctl.nfields++; + if (dev->isoc_ctl.nfields>=2) { + dev->isoc_ctl.nfields=0; + + /* Announces that a new buffer were filled */ + buffer_filled (dev, dma_q, *buf); + dprintk(dev, V4L2_DEBUG_ISOC, + "new buffer filled\n"); + get_next_buf (dma_q, buf); + if (!*buf) + return rc; + out_p = videobuf_to_vmalloc(&((*buf)->vb)); + if (!out_p) + return rc; + + pos = dev->isoc_ctl.pos = 0; + } + } + + start_line=line; + last_field=field; + } + if (cmd == TM6000_URB_MSG_VIDEO) + last_line = line; + + pktsize = TM6000_URB_MSG_LEN; + } else { + /* Continue the last copy */ + cmd = dev->isoc_ctl.cmd; + size= dev->isoc_ctl.size; + pos = dev->isoc_ctl.pos; + pktsize = dev->isoc_ctl.pktsize; + } + + cpysize = (endp-(*ptr) > size) ? size : endp - *ptr; + + if (cpysize) { + /* handles each different URB message */ + switch(cmd) { + case TM6000_URB_MSG_VIDEO: + /* Fills video buffer */ + memcpy(&out_p[pos], *ptr, cpysize); + break; + case TM6000_URB_MSG_PTS: + break; + case TM6000_URB_MSG_AUDIO: +/* Need some code to process audio */ +printk ("%ld: cmd=%s, size=%d\n", jiffies, + tm6000_msg_type[cmd],size); + break; + default: + dprintk (dev, V4L2_DEBUG_ISOC, "cmd=%s, size=%d\n", + tm6000_msg_type[cmd],size); + } + } + if (cpysize<size) { + /* End of URB packet, but cmd processing is not + * complete. Preserve the state for a next packet + */ + dev->isoc_ctl.pos = pos+cpysize; + dev->isoc_ctl.size= size-cpysize; + dev->isoc_ctl.cmd = cmd; + dev->isoc_ctl.pktsize = pktsize-cpysize; + (*ptr)+=cpysize; + } else { + dev->isoc_ctl.cmd = 0; + (*ptr)+=pktsize; + } + + return rc; +} + +static int copy_streams(u8 *data, u8 *out_p, unsigned long len, + struct urb *urb, struct tm6000_buffer **buf) +{ + struct tm6000_dmaqueue *dma_q = urb->context; + struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq); + u8 *ptr=data, *endp=data+len; + unsigned long header=0; + int rc=0; + + for (ptr=data; ptr<endp;) { + if (!dev->isoc_ctl.cmd) { + u8 *p=(u8 *)&dev->isoc_ctl.tmp_buf; + /* FIXME: This seems very complex + * It just recovers up to 3 bytes of the header that + * might be at the previous packet + */ + if (dev->isoc_ctl.tmp_buf_len) { + while (dev->isoc_ctl.tmp_buf_len) { + if ( *(ptr+3-dev->isoc_ctl.tmp_buf_len) == 0x47) { + break; + } + p++; + dev->isoc_ctl.tmp_buf_len--; + } + if (dev->isoc_ctl.tmp_buf_len) { + memcpy(&header, p, + dev->isoc_ctl.tmp_buf_len); + memcpy((u8 *)&header + + dev->isoc_ctl.tmp_buf_len, + ptr, + 4 - dev->isoc_ctl.tmp_buf_len); + ptr += 4 - dev->isoc_ctl.tmp_buf_len; + goto HEADER; + } + } + /* Seek for sync */ + for (;ptr<endp-3;ptr++) { + if (*(ptr+3)==0x47) + break; + } + + if (ptr+3>=endp) { + dev->isoc_ctl.tmp_buf_len=endp-ptr; + memcpy (&dev->isoc_ctl.tmp_buf,ptr, + dev->isoc_ctl.tmp_buf_len); + dev->isoc_ctl.cmd=0; + return rc; + } + + /* Get message header */ + header=*(unsigned long *)ptr; + ptr+=4; + } +HEADER: + /* Copy or continue last copy */ + rc=copy_packet(urb,header,&ptr,endp,out_p,buf); + if (rc<0) { + buf=NULL; + printk(KERN_ERR "tm6000: buffer underrun at %ld\n", + jiffies); + return rc; + } + if (!*buf) + return 0; + } + + return 0; +} +/* + * Identify the tm5600/6000 buffer header type and properly handles + */ +static int copy_multiplexed(u8 *ptr, u8 *out_p, unsigned long len, + struct urb *urb, struct tm6000_buffer **buf) +{ + struct tm6000_dmaqueue *dma_q = urb->context; + struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq); + unsigned int pos=dev->isoc_ctl.pos,cpysize; + int rc=1; + + while (len>0) { + cpysize=min(len,(*buf)->vb.size-pos); +//printk("Copying %d bytes (max=%lu) from %p to %p[%u]\n",cpysize,(*buf)->vb.size,ptr,out_p,pos); + memcpy(&out_p[pos], ptr, cpysize); + pos+=cpysize; + ptr+=cpysize; + len-=cpysize; + if (pos >= (*buf)->vb.size) { + pos=0; + /* Announces that a new buffer were filled */ + buffer_filled (dev, dma_q, *buf); + dprintk(dev, V4L2_DEBUG_ISOC, "new buffer filled\n"); + get_next_buf (dma_q, buf); + if (!*buf) + break; + out_p = videobuf_to_vmalloc(&((*buf)->vb)); + if (!out_p) + return rc; + pos = 0; + } + } + + dev->isoc_ctl.pos=pos; + return rc; +} + +static void inline print_err_status (struct tm6000_core *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) { + dprintk(dev, V4L2_DEBUG_QUEUE, "URB status %d [%s].\n", + status, errmsg); + } else { + dprintk(dev, V4L2_DEBUG_QUEUE, "URB packet %d, status %d [%s].\n", + packet, status, errmsg); + } +} + + +/* + * Controls the isoc copy of each urb packet + */ +static inline int tm6000_isoc_copy(struct urb *urb) +{ + struct tm6000_dmaqueue *dma_q = urb->context; + struct tm6000_core *dev= container_of(dma_q,struct tm6000_core,vidq); + struct tm6000_buffer *buf; + int i, len=0, rc=1; + int size; + char *outp = NULL, *p; + unsigned long copied; + + get_next_buf(dma_q, &buf); + if (buf) + outp = videobuf_to_vmalloc(&buf->vb); + + if (!outp) + return 0; + + size = buf->vb.size; + + copied=0; + + if (urb->status<0) { + print_err_status (dev,-1,urb->status); + return 0; + } + + 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); + continue; + } + + len=urb->iso_frame_desc[i].actual_length; + +// if (len>=TM6000_URB_MSG_LEN) { + p=urb->transfer_buffer + urb->iso_frame_desc[i].offset; + if (!urb->iso_frame_desc[i].status) { + if ((buf->fmt->fourcc)==V4L2_PIX_FMT_TM6000) { + rc=copy_multiplexed(p, outp, len, urb, &buf); + if (rc<=0) + return rc; + } else { + copy_streams(p, outp, len, urb, &buf); + } + } + copied += len; + if (copied >= size || !buf) + break; +// } + } + return rc; +} + +/* ------------------------------------------------------------------ + URB control + ------------------------------------------------------------------*/ + +/* + * IRQ callback, called by URB callback + */ +static void tm6000_irq_callback(struct urb *urb) +{ + struct tm6000_dmaqueue *dma_q = urb->context; + struct tm6000_core *dev = container_of(dma_q, struct tm6000_core, vidq); + int i; + + if (!dev) + return; + + spin_lock(&dev->slock); + tm6000_isoc_copy(urb); + spin_unlock(&dev->slock); + + /* Reset urb buffers */ + for (i = 0; i < urb->number_of_packets; i++) { + urb->iso_frame_desc[i].status = 0; + urb->iso_frame_desc[i].actual_length = 0; + } + + urb->status = usb_submit_urb(urb, GFP_ATOMIC); + if (urb->status) + tm6000_err("urb resubmit failed (error=%i)\n", + urb->status); +} + +/* + * Stop and Deallocate URBs + */ +static void tm6000_uninit_isoc(struct tm6000_core *dev) +{ + struct urb *urb; + int i; + + dev->isoc_ctl.nfields = -1; + dev->isoc_ctl.buf = NULL; + for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { + urb=dev->isoc_ctl.urb[i]; + if (urb) { + usb_kill_urb(urb); + usb_unlink_urb(urb); + if (dev->isoc_ctl.transfer_buffer[i]) { + usb_free_coherent(dev->udev, + urb->transfer_buffer_length, + dev->isoc_ctl.transfer_buffer[i], + urb->transfer_dma); + } + usb_free_urb(urb); + dev->isoc_ctl.urb[i] = NULL; + } + dev->isoc_ctl.transfer_buffer[i] = NULL; + } + + kfree (dev->isoc_ctl.urb); + kfree (dev->isoc_ctl.transfer_buffer); + + dev->isoc_ctl.urb=NULL; + dev->isoc_ctl.transfer_buffer=NULL; + dev->isoc_ctl.num_bufs = 0; + + dev->isoc_ctl.num_bufs=0; +} + +/* + * Allocate URBs and start IRQ + */ +static int tm6000_prepare_isoc(struct tm6000_core *dev, unsigned int framesize) +{ + struct tm6000_dmaqueue *dma_q = &dev->vidq; + int i, j, sb_size, pipe, size, max_packets, num_bufs = 5; + struct urb *urb; + + /* De-allocates all pending stuff */ + tm6000_uninit_isoc(dev); + + usb_set_interface(dev->udev, + dev->isoc_in.bInterfaceNumber, + dev->isoc_in.bAlternateSetting); + + pipe = usb_rcvisocpipe(dev->udev, + dev->isoc_in.endp->desc.bEndpointAddress & + USB_ENDPOINT_NUMBER_MASK); + + size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe)); + + if (size > dev->isoc_in.maxsize) + size = dev->isoc_in.maxsize; + + dev->isoc_ctl.max_pkt_size = size; + + max_packets = ( framesize + size - 1) / size; + + if (max_packets > TM6000_MAX_ISO_PACKETS) + max_packets = TM6000_MAX_ISO_PACKETS; + + sb_size = max_packets * size; + + dev->isoc_ctl.num_bufs = num_bufs; + + dev->isoc_ctl.urb = kmalloc(sizeof(void *)*num_bufs, GFP_KERNEL); + if (!dev->isoc_ctl.urb) { + tm6000_err("cannot alloc memory for usb buffers\n"); + return -ENOMEM; + } + + dev->isoc_ctl.transfer_buffer = kmalloc(sizeof(void *)*num_bufs, + GFP_KERNEL); + if (!dev->isoc_ctl.transfer_buffer) { + tm6000_err("cannot allocate memory for usbtransfer\n"); + kfree(dev->isoc_ctl.urb); + return -ENOMEM; + } + + dprintk(dev, V4L2_DEBUG_QUEUE, "Allocating %d x %d packets" + " (%d bytes) of %d bytes each to handle %u size\n", + max_packets, num_bufs, sb_size, + dev->isoc_in.maxsize, size); + + /* allocate urbs and transfer buffers */ + for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { + urb = usb_alloc_urb(max_packets, GFP_KERNEL); + if (!urb) { + tm6000_err("cannot alloc isoc_ctl.urb %i\n", i); + tm6000_uninit_isoc(dev); + usb_free_urb(urb); + return -ENOMEM; + } + dev->isoc_ctl.urb[i] = urb; + + dev->isoc_ctl.transfer_buffer[i] = usb_alloc_coherent(dev->udev, + sb_size, GFP_KERNEL, &urb->transfer_dma); + if (!dev->isoc_ctl.transfer_buffer[i]) { + tm6000_err ("unable to allocate %i bytes for transfer" + " buffer %i%s\n", + sb_size, i, + in_interrupt()?" while in int":""); + tm6000_uninit_isoc(dev); + return -ENOMEM; + } + memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size); + + usb_fill_bulk_urb(urb, dev->udev, pipe, + dev->isoc_ctl.transfer_buffer[i], sb_size, + tm6000_irq_callback, dma_q); + urb->interval = dev->isoc_in.endp->desc.bInterval; + urb->number_of_packets = max_packets; + urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + + for (j = 0; j < max_packets; j++) { + urb->iso_frame_desc[j].offset = size * j; + urb->iso_frame_desc[j].length = size; + } + } + + return 0; +} + +static int tm6000_start_thread( struct tm6000_core *dev) +{ + struct tm6000_dmaqueue *dma_q = &dev->vidq; + int i; + + dma_q->frame=0; + dma_q->ini_jiffies=jiffies; + + init_waitqueue_head(&dma_q->wq); + + /* submit urbs and enables IRQ */ + for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { + int rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC); + if (rc) { + tm6000_err("submit of urb %i failed (error=%i)\n", i, + rc); + tm6000_uninit_isoc(dev); + return rc; + } + } + + return 0; +} + +/* ------------------------------------------------------------------ + Videobuf operations + ------------------------------------------------------------------*/ + +static int +buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) +{ + struct tm6000_fh *fh = vq->priv_data; + + *size = fh->fmt->depth * fh->width * fh->height >> 3; + if (0 == *count) + *count = TM6000_DEF_BUF; + + if (*count < TM6000_MIN_BUF) { + *count=TM6000_MIN_BUF; + } + + while (*size * *count > vid_limit * 1024 * 1024) + (*count)--; + + return 0; +} + +static void free_buffer(struct videobuf_queue *vq, struct tm6000_buffer *buf) +{ + struct tm6000_fh *fh = vq->priv_data; + struct tm6000_core *dev = fh->dev; + unsigned long flags; + + 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 tm6000_fh *fh = vq->priv_data; + struct tm6000_buffer *buf = container_of(vb,struct tm6000_buffer,vb); + struct tm6000_core *dev = fh->dev; + int rc = 0, urb_init = 0; + + BUG_ON(NULL == fh->fmt); + + + /* FIXME: It assumes depth=2 */ + /* The only currently supported format is 16 bits/pixel */ + buf->vb.size = fh->fmt->depth*fh->width*fh->height >> 3; + if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) + return -EINVAL; + + if (buf->fmt != fh->fmt || + buf->vb.width != fh->width || + buf->vb.height != fh->height || + buf->vb.field != field) { + buf->fmt = fh->fmt; + buf->vb.width = fh->width; + buf->vb.height = fh->height; + buf->vb.field = field; + buf->vb.state = VIDEOBUF_NEEDS_INIT; + } + + if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { + if (0 != (rc = videobuf_iolock(vq, &buf->vb, NULL))) + goto fail; + urb_init = 1; + } + + if (!dev->isoc_ctl.num_bufs) + urb_init = 1; + + if (urb_init) { + rc = tm6000_prepare_isoc(dev, buf->vb.size); + if (rc < 0) + goto fail; + + rc = tm6000_start_thread(dev); + 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 tm6000_buffer *buf = container_of(vb,struct tm6000_buffer,vb); + struct tm6000_fh *fh = vq->priv_data; + struct tm6000_core *dev = fh->dev; + struct tm6000_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 tm6000_buffer *buf = container_of(vb,struct tm6000_buffer,vb); + + free_buffer(vq,buf); +} + +static struct videobuf_queue_ops tm6000_video_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, +}; + +/* ------------------------------------------------------------------ + IOCTL handling + ------------------------------------------------------------------*/ + +static int res_get(struct tm6000_core *dev, struct tm6000_fh *fh) +{ + /* is it free? */ + mutex_lock(&dev->lock); + if (dev->resources) { + /* no, someone else uses it */ + mutex_unlock(&dev->lock); + return 0; + } + /* it's free, grab it */ + dev->resources =1; + dprintk(dev, V4L2_DEBUG_RES_LOCK, "res: get\n"); + mutex_unlock(&dev->lock); + return 1; +} + +static int res_locked(struct tm6000_core *dev) +{ + return (dev->resources); +} + +static void res_free(struct tm6000_core *dev, struct tm6000_fh *fh) +{ + mutex_lock(&dev->lock); + dev->resources = 0; + dprintk(dev, V4L2_DEBUG_RES_LOCK, "res: put\n"); + mutex_unlock(&dev->lock); +} + +/* ------------------------------------------------------------------ + IOCTL vidioc handling + ------------------------------------------------------------------*/ +static int vidioc_querycap (struct file *file, void *priv, + struct v4l2_capability *cap) +{ + // struct tm6000_core *dev = ((struct tm6000_fh *)priv)->dev; + + strlcpy(cap->driver, "tm6000", sizeof(cap->driver)); + strlcpy(cap->card,"Trident TVMaster TM5600/6000/6010", sizeof(cap->card)); + // strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); + cap->version = TM6000_VERSION; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_STREAMING | + V4L2_CAP_TUNER | + V4L2_CAP_READWRITE; + return 0; +} + +static int vidioc_enum_fmt_vid_cap (struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (unlikely(f->index >= ARRAY_SIZE(format))) + return -EINVAL; + + strlcpy(f->description,format[f->index].name,sizeof(f->description)); + f->pixelformat = format[f->index].fourcc; + return 0; +} + +static int vidioc_g_fmt_vid_cap (struct file *file, void *priv, + struct v4l2_format *f) +{ + struct tm6000_fh *fh=priv; + + f->fmt.pix.width = fh->width; + f->fmt.pix.height = fh->height; + f->fmt.pix.field = fh->vb_vidq.field; + f->fmt.pix.pixelformat = fh->fmt->fourcc; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * fh->fmt->depth) >> 3; + f->fmt.pix.sizeimage = + f->fmt.pix.height * f->fmt.pix.bytesperline; + + return (0); +} + +static struct tm6000_fmt* format_by_fourcc(unsigned int fourcc) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(format); i++) + if (format[i].fourcc == fourcc) + return format+i; + return NULL; +} + +static int vidioc_try_fmt_vid_cap (struct file *file, void *priv, + struct v4l2_format *f) +{ + struct tm6000_core *dev = ((struct tm6000_fh *)priv)->dev; + struct tm6000_fmt *fmt; + enum v4l2_field field; + + fmt = format_by_fourcc(f->fmt.pix.pixelformat); + if (NULL == fmt) { + dprintk(dev, V4L2_DEBUG_IOCTL_ARG, "Fourcc format (0x%08x)" + " invalid.\n", f->fmt.pix.pixelformat); + return -EINVAL; + } + + field = f->fmt.pix.field; + + if (field == V4L2_FIELD_ANY) { +// field=V4L2_FIELD_INTERLACED; + field=V4L2_FIELD_SEQ_TB; + } else if (V4L2_FIELD_INTERLACED != field) { + dprintk(dev, V4L2_DEBUG_IOCTL_ARG, "Field type invalid.\n"); + return -EINVAL; + } + + tm6000_get_std_res (dev); + + f->fmt.pix.width = dev->width; + f->fmt.pix.height = dev->height; + + f->fmt.pix.width &= ~0x01; + + f->fmt.pix.field = field; + + f->fmt.pix.bytesperline = + (f->fmt.pix.width * fmt->depth) >> 3; + f->fmt.pix.sizeimage = + f->fmt.pix.height * f->fmt.pix.bytesperline; + + return 0; +} + +/*FIXME: This seems to be generic enough to be at videodev2 */ +static int vidioc_s_fmt_vid_cap (struct file *file, void *priv, + struct v4l2_format *f) +{ + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + int ret = vidioc_try_fmt_vid_cap(file,fh,f); + if (ret < 0) + return (ret); + + fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat); + fh->width = f->fmt.pix.width; + fh->height = f->fmt.pix.height; + fh->vb_vidq.field = f->fmt.pix.field; + fh->type = f->type; + + dev->fourcc = f->fmt.pix.pixelformat; + + tm6000_set_fourcc_format(dev); + + return (0); +} + +static int vidioc_reqbufs (struct file *file, void *priv, + struct v4l2_requestbuffers *p) +{ + struct tm6000_fh *fh=priv; + + return (videobuf_reqbufs(&fh->vb_vidq, p)); +} + +static int vidioc_querybuf (struct file *file, void *priv, + struct v4l2_buffer *p) +{ + struct tm6000_fh *fh=priv; + + return (videobuf_querybuf(&fh->vb_vidq, p)); +} + +static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p) +{ + struct tm6000_fh *fh=priv; + + return (videobuf_qbuf(&fh->vb_vidq, p)); +} + +static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p) +{ + struct tm6000_fh *fh=priv; + + return (videobuf_dqbuf(&fh->vb_vidq, p, + file->f_flags & O_NONBLOCK)); +} + +#ifdef CONFIG_VIDEO_V4L1_COMPAT +static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf) +{ + struct tm6000_fh *fh=priv; + + return videobuf_cgmbuf (&fh->vb_vidq, mbuf, 8); +} +#endif + +static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i) +{ + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (i != fh->type) + return -EINVAL; + + if (!res_get(dev,fh)) + return -EBUSY; + return (videobuf_streamon(&fh->vb_vidq)); +} + +static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i) +{ + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (i != fh->type) + return -EINVAL; + + videobuf_streamoff(&fh->vb_vidq); + res_free(dev,fh); + + return (0); +} + +static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *norm) +{ + int rc=0; + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + + rc=tm6000_set_standard (dev, norm); + + fh->width = dev->width; + fh->height = dev->height; + + if (rc<0) + return rc; + + v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm); + + return 0; +} + +static int vidioc_enum_input (struct file *file, void *priv, + struct v4l2_input *inp) +{ + switch (inp->index) { + case TM6000_INPUT_TV: + inp->type = V4L2_INPUT_TYPE_TUNER; + strcpy(inp->name,"Television"); + break; + case TM6000_INPUT_COMPOSITE: + inp->type = V4L2_INPUT_TYPE_CAMERA; + strcpy(inp->name,"Composite"); + break; + case TM6000_INPUT_SVIDEO: + inp->type = V4L2_INPUT_TYPE_CAMERA; + strcpy(inp->name,"S-Video"); + break; + default: + return -EINVAL; + } + inp->std = TM6000_STD; + + return 0; +} + +static int vidioc_g_input (struct file *file, void *priv, unsigned int *i) +{ + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + + *i=dev->input; + + return 0; +} +static int vidioc_s_input (struct file *file, void *priv, unsigned int i) +{ + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + int rc=0; + char buf[1]; + + switch (i) { + case TM6000_INPUT_TV: + dev->input=i; + *buf=0; + break; + case TM6000_INPUT_COMPOSITE: + case TM6000_INPUT_SVIDEO: + dev->input=i; + *buf=1; + break; + default: + return -EINVAL; + } + rc=tm6000_read_write_usb (dev, USB_DIR_OUT | USB_TYPE_VENDOR, + REQ_03_SET_GET_MCU_PIN, 0x03, 1, buf, 1); + + if (!rc) { + dev->input=i; + rc=vidioc_s_std (file, priv, &dev->vfd->current_norm); + } + + return (rc); +} + + /* --- controls ---------------------------------------------- */ +static int vidioc_queryctrl (struct file *file, void *priv, + struct v4l2_queryctrl *qc) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(tm6000_qctrl); i++) + if (qc->id && qc->id == tm6000_qctrl[i].id) { + memcpy(qc, &(tm6000_qctrl[i]), + sizeof(*qc)); + return (0); + } + + return -EINVAL; +} + +static int vidioc_g_ctrl (struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + struct tm6000_fh *fh=priv; + struct tm6000_core *dev = fh->dev; + int val; + + /* FIXME: Probably, those won't work! Maybe we need shadow regs */ + switch (ctrl->id) { + case V4L2_CID_CONTRAST: + val = tm6000_get_reg(dev, TM6010_REQ07_R08_LUMA_CONTRAST_ADJ, 0); + break; + case V4L2_CID_BRIGHTNESS: + val = tm6000_get_reg(dev, TM6010_REQ07_R09_LUMA_BRIGHTNESS_ADJ, 0); + return 0; + case V4L2_CID_SATURATION: + val = tm6000_get_reg(dev, TM6010_REQ07_R0A_CHROMA_SATURATION_ADJ, 0); + return 0; + case V4L2_CID_HUE: + val = tm6000_get_reg(dev, TM6010_REQ07_R0B_CHROMA_HUE_PHASE_ADJ, 0); + return 0; + default: + return -EINVAL; + } + + if (val<0) + return val; + + ctrl->value=val; + + return 0; +} +static int vidioc_s_ctrl (struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + struct tm6000_fh *fh =priv; + struct tm6000_core *dev = fh->dev; + u8 val=ctrl->value; + + switch (ctrl->id) { + case V4L2_CID_CONTRAST: + tm6000_set_reg(dev, TM6010_REQ07_R08_LUMA_CONTRAST_ADJ, val); + return 0; + case V4L2_CID_BRIGHTNESS: + tm6000_set_reg(dev, TM6010_REQ07_R09_LUMA_BRIGHTNESS_ADJ, val); + return 0; + case V4L2_CID_SATURATION: + tm6000_set_reg(dev, TM6010_REQ07_R0A_CHROMA_SATURATION_ADJ, val); + return 0; + case V4L2_CID_HUE: + tm6000_set_reg(dev, TM6010_REQ07_R0B_CHROMA_HUE_PHASE_ADJ, val); + return 0; + } + return -EINVAL; +} + +static int vidioc_g_tuner (struct file *file, void *priv, + struct v4l2_tuner *t) +{ + struct tm6000_fh *fh =priv; + struct tm6000_core *dev = fh->dev; + + if (unlikely(UNSET == dev->tuner_type)) + return -EINVAL; + if (0 != t->index) + return -EINVAL; + + strcpy(t->name, "Television"); + t->type = V4L2_TUNER_ANALOG_TV; + t->capability = V4L2_TUNER_CAP_NORM; + t->rangehigh = 0xffffffffUL; + t->rxsubchans = V4L2_TUNER_SUB_MONO; + + return 0; +} + +static int vidioc_s_tuner (struct file *file, void *priv, + struct v4l2_tuner *t) +{ + struct tm6000_fh *fh =priv; + struct tm6000_core *dev = fh->dev; + + if (UNSET == dev->tuner_type) + return -EINVAL; + if (0 != t->index) + return -EINVAL; + + return 0; +} + +static int vidioc_g_frequency (struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct tm6000_fh *fh =priv; + struct tm6000_core *dev = fh->dev; + + if (unlikely(UNSET == dev->tuner_type)) + return -EINVAL; + + f->type = V4L2_TUNER_ANALOG_TV; + f->frequency = dev->freq; + + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, f); + + return 0; +} + +static int vidioc_s_frequency (struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct tm6000_fh *fh =priv; + struct tm6000_core *dev = fh->dev; + + if (unlikely(f->type != V4L2_TUNER_ANALOG_TV)) + return -EINVAL; + + if (unlikely(UNSET == dev->tuner_type)) + return -EINVAL; + if (unlikely(f->tuner != 0)) + return -EINVAL; + +// mutex_lock(&dev->lock); + dev->freq = f->frequency; + v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f); +// mutex_unlock(&dev->lock); + + return 0; +} + +/* ------------------------------------------------------------------ + File operations for the device + ------------------------------------------------------------------*/ + +static int tm6000_open(struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct tm6000_core *dev = video_drvdata(file); + struct tm6000_fh *fh; + enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + int i,rc; + + printk(KERN_INFO "tm6000: open called (dev=%s)\n", + video_device_node_name(vdev)); + + dprintk(dev, V4L2_DEBUG_OPEN, "tm6000: open called (dev=%s)\n", + video_device_node_name(vdev)); + + + /* If more than one user, mutex should be added */ + dev->users++; + + dprintk(dev, V4L2_DEBUG_OPEN, "open dev=%s type=%s users=%d\n", + video_device_node_name(vdev), v4l2_type_names[type], + dev->users); + + /* allocate + initialize per filehandle data */ + fh = kzalloc(sizeof(*fh),GFP_KERNEL); + if (NULL == fh) { + dev->users--; + return -ENOMEM; + } + + file->private_data = fh; + fh->dev = dev; + + fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + dev->fourcc = format[0].fourcc; + + fh->fmt = format_by_fourcc(dev->fourcc); + + tm6000_get_std_res (dev); + + fh->width = dev->width; + fh->height = dev->height; + + dprintk(dev, V4L2_DEBUG_OPEN, "Open: fh=0x%08lx, dev=0x%08lx, " + "dev->vidq=0x%08lx\n", + (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq); + dprintk(dev, V4L2_DEBUG_OPEN, "Open: list_empty " + "queued=%d\n",list_empty(&dev->vidq.queued)); + dprintk(dev, V4L2_DEBUG_OPEN, "Open: list_empty " + "active=%d\n",list_empty(&dev->vidq.active)); + + /* initialize hardware on analog mode */ + if (dev->mode!=TM6000_MODE_ANALOG) { + rc=tm6000_init_analog_mode (dev); + if (rc<0) + return rc; + + /* Put all controls at a sane state */ + for (i = 0; i < ARRAY_SIZE(tm6000_qctrl); i++) + qctl_regs[i] =tm6000_qctrl[i].default_value; + + dev->mode=TM6000_MODE_ANALOG; + } + + videobuf_queue_vmalloc_init(&fh->vb_vidq, &tm6000_video_qops, + NULL, &dev->slock, + fh->type, + V4L2_FIELD_INTERLACED, + sizeof(struct tm6000_buffer),fh); + + return 0; +} + +static ssize_t +tm6000_read(struct file *file, char __user *data, size_t count, loff_t *pos) +{ + struct tm6000_fh *fh = file->private_data; + + if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) { + if (res_locked(fh->dev)) + return -EBUSY; + + return videobuf_read_stream(&fh->vb_vidq, data, count, pos, 0, + file->f_flags & O_NONBLOCK); + } + return 0; +} + +static unsigned int +tm6000_poll(struct file *file, struct poll_table_struct *wait) +{ + struct tm6000_fh *fh = file->private_data; + struct tm6000_buffer *buf; + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) + return POLLERR; + + if (res_get(fh->dev,fh)) { + /* streaming capture */ + if (list_empty(&fh->vb_vidq.stream)) + return POLLERR; + buf = list_entry(fh->vb_vidq.stream.next,struct tm6000_buffer,vb.stream); + } else { + /* read() capture */ + return videobuf_poll_stream(file, &fh->vb_vidq, + wait); + } + poll_wait(file, &buf->vb.done, wait); + if (buf->vb.state == VIDEOBUF_DONE || + buf->vb.state == VIDEOBUF_ERROR) + return POLLIN|POLLRDNORM; + return 0; +} + +static int tm6000_release(struct file *file) +{ + struct tm6000_fh *fh = file->private_data; + struct tm6000_core *dev = fh->dev; + struct video_device *vdev = video_devdata(file); + + dprintk(dev, V4L2_DEBUG_OPEN, "tm6000: close called (dev=%s, users=%d)\n", + video_device_node_name(vdev), dev->users); + + dev->users--; + + if (!dev->users) { + tm6000_uninit_isoc(dev); + videobuf_mmap_free(&fh->vb_vidq); + } + + kfree (fh); + + return 0; +} + +static int tm6000_mmap(struct file *file, struct vm_area_struct * vma) +{ + struct tm6000_fh *fh = file->private_data; + int ret; + + ret=videobuf_mmap_mapper(&fh->vb_vidq, vma); + + return ret; +} + +static struct v4l2_file_operations tm6000_fops = { + .owner = THIS_MODULE, + .open = tm6000_open, + .release = tm6000_release, + .ioctl = video_ioctl2, /* V4L2 ioctl handler */ + .read = tm6000_read, + .poll = tm6000_poll, + .mmap = tm6000_mmap, +}; + +static const struct v4l2_ioctl_ops video_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_s_std = vidioc_s_std, + .vidioc_enum_input = vidioc_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_queryctrl = vidioc_queryctrl, + .vidioc_g_ctrl = vidioc_g_ctrl, + .vidioc_s_ctrl = vidioc_s_ctrl, + .vidioc_g_tuner = vidioc_g_tuner, + .vidioc_s_tuner = vidioc_s_tuner, + .vidioc_g_frequency = vidioc_g_frequency, + .vidioc_s_frequency = vidioc_s_frequency, + .vidioc_streamon = vidioc_streamon, + .vidioc_streamoff = vidioc_streamoff, + .vidioc_reqbufs = vidioc_reqbufs, + .vidioc_querybuf = vidioc_querybuf, + .vidioc_qbuf = vidioc_qbuf, + .vidioc_dqbuf = vidioc_dqbuf, +#ifdef CONFIG_VIDEO_V4L1_COMPAT + .vidiocgmbuf = vidiocgmbuf, +#endif +}; + +static struct video_device tm6000_template = { + .name = "tm6000", + .fops = &tm6000_fops, + .ioctl_ops = &video_ioctl_ops, + .release = video_device_release, + .tvnorms = TM6000_STD, + .current_norm = V4L2_STD_NTSC_M, +}; + +/* ----------------------------------------------------------------- + Initialization and module stuff + ------------------------------------------------------------------*/ + +int tm6000_v4l2_register(struct tm6000_core *dev) +{ + int ret = -1; + struct video_device *vfd; + + vfd = video_device_alloc(); + if(!vfd) { + return -ENOMEM; + } + dev->vfd = vfd; + + /* init video dma queues */ + INIT_LIST_HEAD(&dev->vidq.active); + INIT_LIST_HEAD(&dev->vidq.queued); + + memcpy (dev->vfd, &tm6000_template, sizeof(*(dev->vfd))); + dev->vfd->debug=tm6000_debug; + vfd->v4l2_dev = &dev->v4l2_dev; + video_set_drvdata(vfd, dev); + + ret = video_register_device(dev->vfd, VFL_TYPE_GRABBER, video_nr); + printk(KERN_INFO "Trident TVMaster TM5600/TM6000/TM6010 USB2 board (Load status: %d)\n", ret); + return ret; +} + +int tm6000_v4l2_unregister(struct tm6000_core *dev) +{ + video_unregister_device(dev->vfd); + + return 0; +} + +int tm6000_v4l2_exit(void) +{ + return 0; +} + +module_param(video_nr, int, 0); +MODULE_PARM_DESC(video_nr,"Allow changing video device number"); + +module_param_named (debug, tm6000_debug, int, 0444); +MODULE_PARM_DESC(debug,"activates debug info"); + +module_param(vid_limit,int,0644); +MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes"); + |