diff options
Diffstat (limited to 'drivers/media/common/saa7146/saa7146_fops.c')
-rw-r--r-- | drivers/media/common/saa7146/saa7146_fops.c | 664 |
1 files changed, 664 insertions, 0 deletions
diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c new file mode 100644 index 00000000000..b3890bd49df --- /dev/null +++ b/drivers/media/common/saa7146/saa7146_fops.c @@ -0,0 +1,664 @@ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <media/saa7146_vv.h> +#include <linux/module.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; + + DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev)); + + if (mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; + + 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; + } + + v4l2_fh_init(&fh->fh, vdev); + + file->private_data = &fh->fh; + fh->dev = dev; + + if (vdev->vfl_type == VFL_TYPE_VBI) { + 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; + v4l2_fh_add(&fh->fh); +out: + if (fh && result != 0) { + kfree(fh); + file->private_data = NULL; + } + mutex_unlock(vdev->lock); + return result; +} + +static int fops_release(struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct saa7146_fh *fh = file->private_data; + struct saa7146_dev *dev = fh->dev; + + DEB_EE("file:%p\n", file); + + if (mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; + + if (vdev->vfl_type == VFL_TYPE_VBI) { + 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); + } + + v4l2_fh_del(&fh->fh); + v4l2_fh_exit(&fh->fh); + module_put(dev->ext->module); + file->private_data = NULL; + kfree(fh); + + mutex_unlock(vdev->lock); + + return 0; +} + +static int fops_mmap(struct file *file, struct vm_area_struct * vma) +{ + struct video_device *vdev = video_devdata(file); + struct saa7146_fh *fh = file->private_data; + struct videobuf_queue *q; + int res; + + switch (vdev->vfl_type) { + case VFL_TYPE_GRABBER: { + DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n", + file, vma); + q = &fh->video_q; + break; + } + case VFL_TYPE_VBI: { + DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n", + file, vma); + if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT) + return -ENODEV; + q = &fh->vbi_q; + break; + } + default: + BUG(); + return 0; + } + + if (mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; + res = videobuf_mmap_mapper(q, vma); + mutex_unlock(vdev->lock); + return res; +} + +static unsigned int __fops_poll(struct file *file, struct poll_table_struct *wait) +{ + struct video_device *vdev = video_devdata(file); + struct saa7146_fh *fh = file->private_data; + struct videobuf_buffer *buf = NULL; + struct videobuf_queue *q; + unsigned int res = v4l2_ctrl_poll(file, wait); + + DEB_EE("file:%p, poll:%p\n", file, wait); + + if (vdev->vfl_type == VFL_TYPE_VBI) { + if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT) + return res | POLLOUT | POLLWRNORM; + if( 0 == fh->vbi_q.streaming ) + return res | 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 res | POLLERR; + } + + poll_wait(file, &buf->done, wait); + if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) { + DEB_D("poll succeeded!\n"); + return res | POLLIN | POLLRDNORM; + } + + DEB_D("nothing to poll for, buf->state:%d\n", buf->state); + return res; +} + +static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait) +{ + struct video_device *vdev = video_devdata(file); + unsigned int res; + + mutex_lock(vdev->lock); + res = __fops_poll(file, wait); + mutex_unlock(vdev->lock); + return res; +} + +static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) +{ + struct video_device *vdev = video_devdata(file); + struct saa7146_fh *fh = file->private_data; + int ret; + + switch (vdev->vfl_type) { + case VFL_TYPE_GRABBER: +/* + 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 VFL_TYPE_VBI: +/* + 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) { + if (mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; + ret = saa7146_vbi_uops.read(file, data, count, ppos); + mutex_unlock(vdev->lock); + return ret; + } + return -EINVAL; + default: + BUG(); + return 0; + } +} + +static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) +{ + struct video_device *vdev = video_devdata(file); + struct saa7146_fh *fh = file->private_data; + int ret; + + switch (vdev->vfl_type) { + case VFL_TYPE_GRABBER: + return -EINVAL; + case VFL_TYPE_VBI: + if (fh->dev->ext_vv_data->vbi_fops.write) { + if (mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; + ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); + mutex_unlock(vdev->lock); + return ret; + } + 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); + } +} + +static const struct v4l2_ctrl_ops saa7146_ctrl_ops = { + .s_ctrl = saa7146_s_ctrl, +}; + +int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) +{ + struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler; + struct v4l2_pix_format *fmt; + struct v4l2_vbi_format *vbi; + struct saa7146_vv *vv; + int err; + + err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev); + if (err) + return err; + + v4l2_ctrl_handler_init(hdl, 6); + v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, + V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); + v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, + V4L2_CID_CONTRAST, 0, 127, 1, 64); + v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, + V4L2_CID_SATURATION, 0, 127, 1, 64); + v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + if (hdl->error) { + err = hdl->error; + v4l2_ctrl_handler_free(hdl); + return err; + } + dev->v4l2_dev.ctrl_handler = hdl; + + vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); + if (vv == NULL) { + ERR("out of memory. aborting.\n"); + v4l2_ctrl_handler_free(hdl); + return -ENOMEM; + } + ext_vv->vid_ops = saa7146_video_ioctl_ops; + ext_vv->vbi_ops = saa7146_vbi_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); + v4l2_ctrl_handler_free(hdl); + 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); + + fmt = &vv->ov_fb.fmt; + fmt->width = vv->standard->h_max_out; + fmt->height = vv->standard->v_max_out; + fmt->pixelformat = V4L2_PIX_FMT_RGB565; + fmt->bytesperline = 2 * fmt->width; + fmt->sizeimage = fmt->bytesperline * fmt->height; + fmt->colorspace = V4L2_COLORSPACE_SRGB; + + fmt = &vv->video_fmt; + fmt->width = 384; + fmt->height = 288; + fmt->pixelformat = V4L2_PIX_FMT_BGR24; + fmt->field = V4L2_FIELD_ANY; + fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; + fmt->bytesperline = 3 * fmt->width; + fmt->sizeimage = fmt->bytesperline * fmt->height; + + vbi = &vv->vbi_fmt; + vbi->sampling_rate = 27000000; + vbi->offset = 248; /* todo */ + vbi->samples_per_line = 720 * 2; + vbi->sample_format = V4L2_PIX_FMT_GREY; + + /* fixme: this only works for PAL */ + vbi->start[0] = 5; + vbi->count[0] = 16; + vbi->start[1] = 312; + vbi->count[1] = 16; + + init_timer(&vv->vbi_read_timeout); + + vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING; + vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY; + 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); + v4l2_ctrl_handler_free(&dev->ctrl_handler); + 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; + if (type == VFL_TYPE_GRABBER) + vfd->ioctl_ops = &dev->ext_vv_data->vid_ops; + else + vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops; + vfd->release = video_device_release; + vfd->lock = &dev->v4l2_lock; + vfd->v4l2_dev = &dev->v4l2_dev; + vfd->tvnorms = 0; + set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); + 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; + } + + pr_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"); |