#include <media/saa7146_vv.h> #define BOARD_CAN_DO_VBI(dev) (dev->revision != 0 && dev->vv_data->vbi_minor != -1) /****************************************************************************/ /* resource management functions, shamelessly stolen from saa7134 driver */ int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit) { struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; if (fh->resources & bit) { DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources)); /* have it already allocated */ return 1; } /* is it free? */ mutex_lock(&dev->lock); if (vv->resources & bit) { DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit)); /* no, someone else uses it */ mutex_unlock(&dev->lock); return 0; } /* it's free, grab it */ fh->resources |= bit; vv->resources |= bit; DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources)); mutex_unlock(&dev->lock); return 1; } void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits) { struct saa7146_dev *dev = fh->dev; struct saa7146_vv *vv = dev->vv_data; BUG_ON((fh->resources & bits) != bits); mutex_lock(&dev->lock); fh->resources &= ~bits; vv->resources &= ~bits; DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources)); mutex_unlock(&dev->lock); } /********************************************************************************/ /* common dma functions */ void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q, struct saa7146_buf *buf) { struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); DEB_EE(("dev:%p, buf:%p\n",dev,buf)); BUG_ON(in_interrupt()); videobuf_waiton(&buf->vb,0,0); videobuf_dma_unmap(q, dma); videobuf_dma_free(dma); buf->vb.state = STATE_NEEDS_INIT; } /********************************************************************************/ /* common buffer functions */ int saa7146_buffer_queue(struct saa7146_dev *dev, struct saa7146_dmaqueue *q, struct saa7146_buf *buf) { assert_spin_locked(&dev->slock); DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf)); BUG_ON(!q); if (NULL == q->curr) { q->curr = buf; DEB_D(("immediately activating buffer %p\n", buf)); buf->activate(dev,buf,NULL); } else { list_add_tail(&buf->vb.queue,&q->queue); buf->vb.state = STATE_QUEUED; DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf)); } return 0; } void saa7146_buffer_finish(struct saa7146_dev *dev, struct saa7146_dmaqueue *q, int state) { assert_spin_locked(&dev->slock); DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state)); DEB_EE(("q->curr:%p\n",q->curr)); BUG_ON(!q->curr); /* finish current buffer */ if (NULL == q->curr) { DEB_D(("aiii. no current buffer\n")); return; } q->curr->vb.state = state; do_gettimeofday(&q->curr->vb.ts); wake_up(&q->curr->vb.done); q->curr = NULL; } void saa7146_buffer_next(struct saa7146_dev *dev, struct saa7146_dmaqueue *q, int vbi) { struct saa7146_buf *buf,*next = NULL; BUG_ON(!q); DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi)); assert_spin_locked(&dev->slock); if (!list_empty(&q->queue)) { /* activate next one from queue */ buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue); list_del(&buf->vb.queue); if (!list_empty(&q->queue)) next = list_entry(q->queue.next,struct saa7146_buf, vb.queue); q->curr = buf; DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next)); buf->activate(dev,buf,next); } else { DEB_INT(("no next buffer. stopping.\n")); if( 0 != vbi ) { /* turn off video-dma3 */ saa7146_write(dev,MC1, MASK_20); } else { /* nothing to do -- just prevent next video-dma1 transfer by lowering the protection address */ // fixme: fix this for vflip != 0 saa7146_write(dev, PROT_ADDR1, 0); saa7146_write(dev, MC2, (MASK_02|MASK_18)); /* write the address of the rps-program */ saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle); /* turn on rps */ saa7146_write(dev, MC1, (MASK_12 | MASK_28)); /* printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1)); printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1)); printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1)); printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1)); printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1)); printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1)); */ } del_timer(&q->timeout); } } void saa7146_buffer_timeout(unsigned long data) { struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data; struct saa7146_dev *dev = q->dev; unsigned long flags; DEB_EE(("dev:%p, dmaq:%p\n", dev, q)); spin_lock_irqsave(&dev->slock,flags); if (q->curr) { DEB_D(("timeout on %p\n", q->curr)); saa7146_buffer_finish(dev,q,STATE_ERROR); } /* we don't restart the transfer here like other drivers do. when a streaming capture is disabled, the timeout function will be called for the current buffer. if we activate the next buffer now, we mess up our capture logic. if a timeout occurs on another buffer, then something is seriously broken before, so no need to buffer the next capture IMHO... */ /* saa7146_buffer_next(dev,q); */ spin_unlock_irqrestore(&dev->slock,flags); } /********************************************************************************/ /* file operations */ static int fops_open(struct inode *inode, struct file *file) { unsigned int minor = iminor(inode); struct saa7146_dev *h = NULL, *dev = NULL; struct list_head *list; struct saa7146_fh *fh = NULL; int result = 0; enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE; DEB_EE(("inode:%p, file:%p, minor:%d\n",inode,file,minor)); if (mutex_lock_interruptible(&saa7146_devices_lock)) return -ERESTARTSYS; list_for_each(list,&saa7146_devices) { h = list_entry(list, struct saa7146_dev, item); if( NULL == h->vv_data ) { DEB_D(("device %p has not registered video devices.\n",h)); continue; } DEB_D(("trying: %p @ major %d,%d\n",h,h->vv_data->video_minor,h->vv_data->vbi_minor)); if (h->vv_data->video_minor == minor) { dev = h; } if (h->vv_data->vbi_minor == minor) { type = V4L2_BUF_TYPE_VBI_CAPTURE; dev = h; } } if (NULL == dev) { DEB_S(("no such video device.\n")); result = -ENODEV; goto out; } DEB_D(("using: %p\n",dev)); /* check if an extension is registered */ if( NULL == dev->ext ) { DEB_S(("no extension registered for this device.\n")); result = -ENODEV; goto out; } /* allocate per open data */ fh = kzalloc(sizeof(*fh),GFP_KERNEL); if (NULL == fh) { DEB_S(("cannot allocate memory for per open data.\n")); result = -ENOMEM; goto out; } file->private_data = fh; fh->dev = dev; fh->type = type; if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { DEB_S(("initializing vbi...\n")); if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) result = saa7146_vbi_uops.open(dev,file); if (dev->ext_vv_data->vbi_fops.open) dev->ext_vv_data->vbi_fops.open(inode, file); } else { DEB_S(("initializing video...\n")); result = saa7146_video_uops.open(dev,file); } if (0 != result) { goto out; } if( 0 == try_module_get(dev->ext->module)) { result = -EINVAL; goto out; } result = 0; out: if( fh != 0 && result != 0 ) { kfree(fh); file->private_data = NULL; } mutex_unlock(&saa7146_devices_lock); return result; } static int fops_release(struct inode *inode, struct file *file) { struct saa7146_fh *fh = file->private_data; struct saa7146_dev *dev = fh->dev; DEB_EE(("inode:%p, file:%p\n",inode,file)); if (mutex_lock_interruptible(&saa7146_devices_lock)) return -ERESTARTSYS; if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) saa7146_vbi_uops.release(dev,file); if (dev->ext_vv_data->vbi_fops.release) dev->ext_vv_data->vbi_fops.release(inode, file); } else { saa7146_video_uops.release(dev,file); } module_put(dev->ext->module); file->private_data = NULL; kfree(fh); mutex_unlock(&saa7146_devices_lock); return 0; } static int fops_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { /* DEB_EE(("inode:%p, file:%p, cmd:%d, arg:%li\n",inode, file, cmd, arg)); */ return video_usercopy(inode, file, cmd, arg, saa7146_video_do_ioctl); } static int fops_mmap(struct file *file, struct vm_area_struct * vma) { struct saa7146_fh *fh = file->private_data; struct videobuf_queue *q; switch (fh->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: { DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma)); q = &fh->video_q; break; } case V4L2_BUF_TYPE_VBI_CAPTURE: { DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma)); q = &fh->vbi_q; break; } default: BUG(); return 0; } return videobuf_mmap_mapper(q,vma); } static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait) { struct saa7146_fh *fh = file->private_data; struct videobuf_buffer *buf = NULL; struct videobuf_queue *q; DEB_EE(("file:%p, poll:%p\n",file, wait)); if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) { if( 0 == fh->vbi_q.streaming ) return videobuf_poll_stream(file, &fh->vbi_q, wait); q = &fh->vbi_q; } else { DEB_D(("using video queue.\n")); q = &fh->video_q; } if (!list_empty(&q->stream)) buf = list_entry(q->stream.next, struct videobuf_buffer, stream); if (!buf) { DEB_D(("buf == NULL!\n")); return POLLERR; } poll_wait(file, &buf->done, wait); if (buf->state == STATE_DONE || buf->state == STATE_ERROR) { DEB_D(("poll succeeded!\n")); return POLLIN|POLLRDNORM; } DEB_D(("nothing to poll for, buf->state:%d\n",buf->state)); return 0; } static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) { struct saa7146_fh *fh = file->private_data; switch (fh->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: { // DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count)); return saa7146_video_uops.read(file,data,count,ppos); } case V4L2_BUF_TYPE_VBI_CAPTURE: { // DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count)); if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) return saa7146_vbi_uops.read(file,data,count,ppos); else return -EINVAL; } break; default: BUG(); return 0; } } static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) { struct saa7146_fh *fh = file->private_data; switch (fh->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: return -EINVAL; case V4L2_BUF_TYPE_VBI_CAPTURE: if (fh->dev->ext_vv_data->vbi_fops.write) return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); else return -EINVAL; default: BUG(); return -EINVAL; } } static const struct file_operations video_fops = { .owner = THIS_MODULE, .open = fops_open, .release = fops_release, .read = fops_read, .write = fops_write, .poll = fops_poll, .mmap = fops_mmap, .ioctl = fops_ioctl, .llseek = no_llseek, }; static void vv_callback(struct saa7146_dev *dev, unsigned long status) { u32 isr = status; DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status)); if (0 != (isr & (MASK_27))) { DEB_INT(("irq: RPS0 (0x%08x).\n",isr)); saa7146_video_uops.irq_done(dev,isr); } if (0 != (isr & (MASK_28))) { u32 mc2 = saa7146_read(dev, MC2); if( 0 != (mc2 & MASK_15)) { DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr)); wake_up(&dev->vv_data->vbi_wq); saa7146_write(dev,MC2, MASK_31); return; } DEB_INT(("irq: RPS1 (0x%08x).\n",isr)); saa7146_vbi_uops.irq_done(dev,isr); } } static struct video_device device_template = { .fops = &video_fops, .minor = -1, }; int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) { struct saa7146_vv *vv = kzalloc (sizeof(struct saa7146_vv),GFP_KERNEL); if( NULL == vv ) { ERR(("out of memory. aborting.\n")); return -1; } DEB_EE(("dev:%p\n",dev)); /* set default values for video parts of the saa7146 */ saa7146_write(dev, BCS_CTRL, 0x80400040); /* enable video-port pins */ saa7146_write(dev, MC1, (MASK_10 | MASK_26)); /* save per-device extension data (one extension can handle different devices that might need different configuration data) */ dev->ext_vv_data = ext_vv; vv->video_minor = -1; vv->vbi_minor = -1; vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle); if( NULL == vv->d_clipping.cpu_addr ) { ERR(("out of memory. aborting.\n")); kfree(vv); return -1; } memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM); saa7146_video_uops.init(dev,vv); if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) saa7146_vbi_uops.init(dev,vv); dev->vv_data = vv; dev->vv_callback = &vv_callback; return 0; } EXPORT_SYMBOL_GPL(saa7146_vv_init); int saa7146_vv_release(struct saa7146_dev* dev) { struct saa7146_vv *vv = dev->vv_data; DEB_EE(("dev:%p\n",dev)); pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle); kfree(vv); dev->vv_data = NULL; dev->vv_callback = NULL; return 0; } EXPORT_SYMBOL_GPL(saa7146_vv_release); int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev, char *name, int type) { struct saa7146_vv *vv = dev->vv_data; struct video_device *vfd; DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type)); // released by vfd->release vfd = video_device_alloc(); if (vfd == NULL) return -ENOMEM; memcpy(vfd, &device_template, sizeof(struct video_device)); strlcpy(vfd->name, name, sizeof(vfd->name)); vfd->release = video_device_release; vfd->priv = dev; // fixme: -1 should be an insmod parameter *for the extension* (like "video_nr"); if (video_register_device(vfd, type, -1) < 0) { ERR(("cannot register v4l2 device. skipping.\n")); return -1; } if( VFL_TYPE_GRABBER == type ) { vv->video_minor = vfd->minor; INFO(("%s: registered device video%d [v4l2]\n", dev->name, vfd->minor & 0x1f)); } else { vv->vbi_minor = vfd->minor; INFO(("%s: registered device vbi%d [v4l2]\n", dev->name, vfd->minor & 0x1f)); } *vid = vfd; return 0; } EXPORT_SYMBOL_GPL(saa7146_register_device); int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev) { struct saa7146_vv *vv = dev->vv_data; DEB_EE(("dev:%p\n",dev)); if( VFL_TYPE_GRABBER == (*vid)->type ) { vv->video_minor = -1; } else { vv->vbi_minor = -1; } video_unregister_device(*vid); *vid = NULL; return 0; } EXPORT_SYMBOL_GPL(saa7146_unregister_device); static int __init saa7146_vv_init_module(void) { return 0; } static void __exit saa7146_vv_cleanup_module(void) { } module_init(saa7146_vv_init_module); module_exit(saa7146_vv_cleanup_module); MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); MODULE_LICENSE("GPL");