1 files changed, 551 insertions, 0 deletions

diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c
new file mode 100644
index 00000000000..1bd3dd762c6
--- /dev/null
+++ b/drivers/media/common/saa7146_fops.c
@@ -0,0 +1,551 @@
+#include <media/saa7146_vv.h>
+
+/****************************************************************************/
+/* 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? */
+        if (vv->resources & bit) {
+                DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
+                /* no, someone else uses it */
+                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));
+        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);
+
+        fh->resources  &= ~bits;
+        vv->resources &= ~bits;
+        DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
+}
+
+
+/********************************************************************************/
+/* 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(q, &buf->vb, 0, 0);
+        videobuf_dma_unmap(q->dev, dma);
+        videobuf_dma_free(dma);
+        buf->vb.state = VIDEOBUF_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 = VIDEOBUF_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,VIDEOBUF_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 file *file)
+{
+        struct video_device *vdev = video_devdata(file);
+        struct saa7146_dev *dev = video_drvdata(file);
+        struct saa7146_fh *fh = NULL;
+        int result = 0;
+
+        enum v4l2_buf_type type;
+
+        DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
+
+        if (mutex_lock_interruptible(&saa7146_devices_lock))
+                return -ERESTARTSYS;
+
+        DEB_D(("using: %p\n",dev));
+
+        type = vdev->vfl_type == VFL_TYPE_GRABBER
+             ? V4L2_BUF_TYPE_VIDEO_CAPTURE
+             : V4L2_BUF_TYPE_VBI_CAPTURE;
+
+        /* 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(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 && result != 0) {
+                kfree(fh);
+                file->private_data = NULL;
+        }
+        mutex_unlock(&saa7146_devices_lock);
+        return result;
+}
+
+static int fops_release(struct file *file)
+{
+        struct saa7146_fh  *fh  = file->private_data;
+        struct saa7146_dev *dev = fh->dev;
+
+        DEB_EE(("file:%p\n", 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(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_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 == VIDEOBUF_DONE || buf->state == VIDEOBUF_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 v4l2_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,
+        .unlocked_ioctl = video_ioctl2,
+};
+
+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);
+        }
+}
+
+int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
+{
+        struct saa7146_vv *vv;
+        int err;
+
+        err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
+        if (err)
+                return err;
+
+        vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
+        if (vv == NULL) {
+                ERR(("out of memory. aborting.\n"));
+                return -ENOMEM;
+        }
+        ext_vv->ops = saa7146_video_ioctl_ops;
+        ext_vv->core_ops = &saa7146_video_ioctl_ops;
+
+        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->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));
+
+        v4l2_device_unregister(&dev->v4l2_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 video_device *vfd;
+        int err;
+        int i;
+
+        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;
+
+        vfd->fops = &video_fops;
+        vfd->ioctl_ops = &dev->ext_vv_data->ops;
+        vfd->release = video_device_release;
+        vfd->lock = &dev->v4l2_lock;
+        vfd->tvnorms = 0;
+        for (i = 0; i < dev->ext_vv_data->num_stds; i++)
+                vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
+        strlcpy(vfd->name, name, sizeof(vfd->name));
+        video_set_drvdata(vfd, dev);
+
+        err = video_register_device(vfd, type, -1);
+        if (err < 0) {
+                ERR(("cannot register v4l2 device. skipping.\n"));
+                video_device_release(vfd);
+                return err;
+        }
+
+        INFO(("%s: registered device %s [v4l2]\n",
+                dev->name, video_device_node_name(vfd)));
+
+        *vid = vfd;
+        return 0;
+}
+EXPORT_SYMBOL_GPL(saa7146_register_device);
+
+int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
+{
+        DEB_EE(("dev:%p\n",dev));
+
+        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");