Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Steven Toth | 3363 | 92.39% | 3 | 13.64% |
Hans Verkuil | 242 | 6.65% | 7 | 31.82% |
Mauro Carvalho Chehab | 20 | 0.55% | 6 | 27.27% |
Peter Hüwe | 4 | 0.11% | 1 | 4.55% |
Dan Carpenter | 4 | 0.11% | 1 | 4.55% |
Al Viro | 2 | 0.05% | 1 | 4.55% |
Thomas Gleixner | 2 | 0.05% | 1 | 4.55% |
Linus Torvalds | 2 | 0.05% | 1 | 4.55% |
Justin P. Mattock | 1 | 0.03% | 1 | 4.55% |
Total | 3640 | 22 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for the NXP SAA7164 PCIe bridge * * Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com> */ #include "saa7164.h" /* Take the encoder configuration from the port struct and * flush it to the hardware. */ static void saa7164_vbi_configure(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; dprintk(DBGLVL_VBI, "%s()\n", __func__); port->vbi_params.width = port->enc_port->width; port->vbi_params.height = port->enc_port->height; port->vbi_params.is_50hz = (port->enc_port->encodernorm.id & V4L2_STD_625_50) != 0; /* Set up the DIF (enable it) for analog mode by default */ saa7164_api_initialize_dif(port); dprintk(DBGLVL_VBI, "%s() ends\n", __func__); } static int saa7164_vbi_buffers_dealloc(struct saa7164_port *port) { struct list_head *c, *n, *p, *q, *l, *v; struct saa7164_dev *dev = port->dev; struct saa7164_buffer *buf; struct saa7164_user_buffer *ubuf; /* Remove any allocated buffers */ mutex_lock(&port->dmaqueue_lock); dprintk(DBGLVL_VBI, "%s(port=%d) dmaqueue\n", __func__, port->nr); list_for_each_safe(c, n, &port->dmaqueue.list) { buf = list_entry(c, struct saa7164_buffer, list); list_del(c); saa7164_buffer_dealloc(buf); } dprintk(DBGLVL_VBI, "%s(port=%d) used\n", __func__, port->nr); list_for_each_safe(p, q, &port->list_buf_used.list) { ubuf = list_entry(p, struct saa7164_user_buffer, list); list_del(p); saa7164_buffer_dealloc_user(ubuf); } dprintk(DBGLVL_VBI, "%s(port=%d) free\n", __func__, port->nr); list_for_each_safe(l, v, &port->list_buf_free.list) { ubuf = list_entry(l, struct saa7164_user_buffer, list); list_del(l); saa7164_buffer_dealloc_user(ubuf); } mutex_unlock(&port->dmaqueue_lock); dprintk(DBGLVL_VBI, "%s(port=%d) done\n", __func__, port->nr); return 0; } /* Dynamic buffer switch at vbi start time */ static int saa7164_vbi_buffers_alloc(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; struct saa7164_buffer *buf; struct saa7164_user_buffer *ubuf; struct tmHWStreamParameters *params = &port->hw_streamingparams; int result = -ENODEV, i; int len = 0; dprintk(DBGLVL_VBI, "%s()\n", __func__); /* TODO: NTSC SPECIFIC */ /* Init and establish defaults */ params->samplesperline = 1440; params->numberoflines = 12; params->numberoflines = 18; params->pitch = 1600; params->pitch = 1440; params->numpagetables = 2 + ((params->numberoflines * params->pitch) / PAGE_SIZE); params->bitspersample = 8; params->linethreshold = 0; params->pagetablelistvirt = NULL; params->pagetablelistphys = NULL; params->numpagetableentries = port->hwcfg.buffercount; /* Allocate the PCI resources, buffers (hard) */ for (i = 0; i < port->hwcfg.buffercount; i++) { buf = saa7164_buffer_alloc(port, params->numberoflines * params->pitch); if (!buf) { printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n", __func__, result); result = -ENOMEM; goto failed; } else { mutex_lock(&port->dmaqueue_lock); list_add_tail(&buf->list, &port->dmaqueue.list); mutex_unlock(&port->dmaqueue_lock); } } /* Allocate some kernel buffers for copying * to userpsace. */ len = params->numberoflines * params->pitch; if (vbi_buffers < 16) vbi_buffers = 16; if (vbi_buffers > 512) vbi_buffers = 512; for (i = 0; i < vbi_buffers; i++) { ubuf = saa7164_buffer_alloc_user(dev, len); if (ubuf) { mutex_lock(&port->dmaqueue_lock); list_add_tail(&ubuf->list, &port->list_buf_free.list); mutex_unlock(&port->dmaqueue_lock); } } result = 0; failed: return result; } static int saa7164_vbi_initialize(struct saa7164_port *port) { saa7164_vbi_configure(port); return 0; } /* -- V4L2 --------------------------------------------------------- */ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id) { struct saa7164_vbi_fh *fh = file->private_data; return saa7164_s_std(fh->port->enc_port, id); } static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id) { struct saa7164_encoder_fh *fh = file->private_data; return saa7164_g_std(fh->port->enc_port, id); } static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) { struct saa7164_vbi_fh *fh = file->private_data; return saa7164_g_input(fh->port->enc_port, i); } static int vidioc_s_input(struct file *file, void *priv, unsigned int i) { struct saa7164_vbi_fh *fh = file->private_data; return saa7164_s_input(fh->port->enc_port, i); } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct saa7164_vbi_fh *fh = file->private_data; return saa7164_g_frequency(fh->port->enc_port, f); } static int vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { struct saa7164_vbi_fh *fh = file->private_data; int ret = saa7164_s_frequency(fh->port->enc_port, f); if (ret == 0) saa7164_vbi_initialize(fh->port); return ret; } static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { struct saa7164_vbi_fh *fh = file->private_data; struct saa7164_port *port = fh->port; struct saa7164_dev *dev = port->dev; strscpy(cap->driver, dev->name, sizeof(cap->driver)); strscpy(cap->card, saa7164_boards[dev->board].name, sizeof(cap->card)); sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci)); cap->device_caps = V4L2_CAP_VBI_CAPTURE | V4L2_CAP_READWRITE | V4L2_CAP_TUNER; cap->capabilities = cap->device_caps | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_DEVICE_CAPS; return 0; } static int saa7164_vbi_stop_port(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; int ret; ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP); if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n", __func__, ret); ret = -EIO; } else { dprintk(DBGLVL_VBI, "%s() Stopped\n", __func__); ret = 0; } return ret; } static int saa7164_vbi_acquire_port(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; int ret; ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n", __func__, ret); ret = -EIO; } else { dprintk(DBGLVL_VBI, "%s() Acquired\n", __func__); ret = 0; } return ret; } static int saa7164_vbi_pause_port(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; int ret; ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) { printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n", __func__, ret); ret = -EIO; } else { dprintk(DBGLVL_VBI, "%s() Paused\n", __func__); ret = 0; } return ret; } /* Firmware is very windows centric, meaning you have to transition * the part through AVStream / KS Windows stages, forwards or backwards. * States are: stopped, acquired (h/w), paused, started. * We have to leave here will all of the soft buffers on the free list, * else the cfg_post() func won't have soft buffers to correctly configure. */ static int saa7164_vbi_stop_streaming(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; struct saa7164_buffer *buf; struct saa7164_user_buffer *ubuf; struct list_head *c, *n; int ret; dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); ret = saa7164_vbi_pause_port(port); ret = saa7164_vbi_acquire_port(port); ret = saa7164_vbi_stop_port(port); dprintk(DBGLVL_VBI, "%s(port=%d) Hardware stopped\n", __func__, port->nr); /* Reset the state of any allocated buffer resources */ mutex_lock(&port->dmaqueue_lock); /* Reset the hard and soft buffer state */ list_for_each_safe(c, n, &port->dmaqueue.list) { buf = list_entry(c, struct saa7164_buffer, list); buf->flags = SAA7164_BUFFER_FREE; buf->pos = 0; } list_for_each_safe(c, n, &port->list_buf_used.list) { ubuf = list_entry(c, struct saa7164_user_buffer, list); ubuf->pos = 0; list_move_tail(&ubuf->list, &port->list_buf_free.list); } mutex_unlock(&port->dmaqueue_lock); /* Free any allocated resources */ saa7164_vbi_buffers_dealloc(port); dprintk(DBGLVL_VBI, "%s(port=%d) Released\n", __func__, port->nr); return ret; } static int saa7164_vbi_start_streaming(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; int result, ret = 0; dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); port->done_first_interrupt = 0; /* allocate all of the PCIe DMA buffer resources on the fly, * allowing switching between TS and PS payloads without * requiring a complete driver reload. */ saa7164_vbi_buffers_alloc(port); /* Configure the encoder with any cache values */ #if 0 saa7164_api_set_encoder(port); saa7164_api_get_encoder(port); #endif /* Place the empty buffers on the hardware */ saa7164_buffer_cfg_port(port); /* Negotiate format */ if (saa7164_api_set_vbi_format(port) != SAA_OK) { printk(KERN_ERR "%s() No supported VBI format\n", __func__); ret = -EIO; goto out; } /* Acquire the hardware */ result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE); if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n", __func__, result); ret = -EIO; goto out; } else dprintk(DBGLVL_VBI, "%s() Acquired\n", __func__); /* Pause the hardware */ result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE); if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n", __func__, result); /* Stop the hardware, regardless */ result = saa7164_vbi_stop_port(port); if (result != SAA_OK) { printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n", __func__, result); } ret = -EIO; goto out; } else dprintk(DBGLVL_VBI, "%s() Paused\n", __func__); /* Start the hardware */ result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN); if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) { printk(KERN_ERR "%s() run transition failed, result = 0x%x\n", __func__, result); /* Stop the hardware, regardless */ result = saa7164_vbi_acquire_port(port); result = saa7164_vbi_stop_port(port); if (result != SAA_OK) { printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n", __func__, result); } ret = -EIO; } else dprintk(DBGLVL_VBI, "%s() Running\n", __func__); out: return ret; } static int saa7164_vbi_fmt(struct file *file, void *priv, struct v4l2_format *f) { /* ntsc */ f->fmt.vbi.samples_per_line = 1440; f->fmt.vbi.sampling_rate = 27000000; f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; f->fmt.vbi.offset = 0; f->fmt.vbi.flags = 0; f->fmt.vbi.start[0] = 10; f->fmt.vbi.count[0] = 18; f->fmt.vbi.start[1] = 263 + 10 + 1; f->fmt.vbi.count[1] = 18; memset(f->fmt.vbi.reserved, 0, sizeof(f->fmt.vbi.reserved)); return 0; } static int fops_open(struct file *file) { struct saa7164_dev *dev; struct saa7164_port *port; struct saa7164_vbi_fh *fh; port = (struct saa7164_port *)video_get_drvdata(video_devdata(file)); if (!port) return -ENODEV; dev = port->dev; dprintk(DBGLVL_VBI, "%s()\n", __func__); /* allocate + initialize per filehandle data */ fh = kzalloc(sizeof(*fh), GFP_KERNEL); if (NULL == fh) return -ENOMEM; fh->port = port; v4l2_fh_init(&fh->fh, video_devdata(file)); v4l2_fh_add(&fh->fh); file->private_data = fh; return 0; } static int fops_release(struct file *file) { struct saa7164_vbi_fh *fh = file->private_data; struct saa7164_port *port = fh->port; struct saa7164_dev *dev = port->dev; dprintk(DBGLVL_VBI, "%s()\n", __func__); /* Shut device down on last close */ if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) { if (atomic_dec_return(&port->v4l_reader_count) == 0) { /* stop vbi capture then cancel buffers */ saa7164_vbi_stop_streaming(port); } } v4l2_fh_del(&fh->fh); v4l2_fh_exit(&fh->fh); kfree(fh); return 0; } static struct saa7164_user_buffer *saa7164_vbi_next_buf(struct saa7164_port *port) { struct saa7164_user_buffer *ubuf = NULL; struct saa7164_dev *dev = port->dev; u32 crc; mutex_lock(&port->dmaqueue_lock); if (!list_empty(&port->list_buf_used.list)) { ubuf = list_first_entry(&port->list_buf_used.list, struct saa7164_user_buffer, list); if (crc_checking) { crc = crc32(0, ubuf->data, ubuf->actual_size); if (crc != ubuf->crc) { printk(KERN_ERR "%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n", __func__, ubuf, ubuf->crc, crc); } } } mutex_unlock(&port->dmaqueue_lock); dprintk(DBGLVL_VBI, "%s() returns %p\n", __func__, ubuf); return ubuf; } static ssize_t fops_read(struct file *file, char __user *buffer, size_t count, loff_t *pos) { struct saa7164_vbi_fh *fh = file->private_data; struct saa7164_port *port = fh->port; struct saa7164_user_buffer *ubuf = NULL; struct saa7164_dev *dev = port->dev; int ret = 0; int rem, cnt; u8 *p; port->last_read_msecs_diff = port->last_read_msecs; port->last_read_msecs = jiffies_to_msecs(jiffies); port->last_read_msecs_diff = port->last_read_msecs - port->last_read_msecs_diff; saa7164_histogram_update(&port->read_interval, port->last_read_msecs_diff); if (*pos) { printk(KERN_ERR "%s() ESPIPE\n", __func__); return -ESPIPE; } if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) { if (atomic_inc_return(&port->v4l_reader_count) == 1) { if (saa7164_vbi_initialize(port) < 0) { printk(KERN_ERR "%s() EINVAL\n", __func__); return -EINVAL; } saa7164_vbi_start_streaming(port); msleep(200); } } /* blocking wait for buffer */ if ((file->f_flags & O_NONBLOCK) == 0) { if (wait_event_interruptible(port->wait_read, saa7164_vbi_next_buf(port))) { printk(KERN_ERR "%s() ERESTARTSYS\n", __func__); return -ERESTARTSYS; } } /* Pull the first buffer from the used list */ ubuf = saa7164_vbi_next_buf(port); while ((count > 0) && ubuf) { /* set remaining bytes to copy */ rem = ubuf->actual_size - ubuf->pos; cnt = rem > count ? count : rem; p = ubuf->data + ubuf->pos; dprintk(DBGLVL_VBI, "%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n", __func__, (int)count, cnt, rem, ubuf, ubuf->pos); if (copy_to_user(buffer, p, cnt)) { printk(KERN_ERR "%s() copy_to_user failed\n", __func__); if (!ret) { printk(KERN_ERR "%s() EFAULT\n", __func__); ret = -EFAULT; } goto err; } ubuf->pos += cnt; count -= cnt; buffer += cnt; ret += cnt; if (ubuf->pos > ubuf->actual_size) printk(KERN_ERR "read() pos > actual, huh?\n"); if (ubuf->pos == ubuf->actual_size) { /* finished with current buffer, take next buffer */ /* Requeue the buffer on the free list */ ubuf->pos = 0; mutex_lock(&port->dmaqueue_lock); list_move_tail(&ubuf->list, &port->list_buf_free.list); mutex_unlock(&port->dmaqueue_lock); /* Dequeue next */ if ((file->f_flags & O_NONBLOCK) == 0) { if (wait_event_interruptible(port->wait_read, saa7164_vbi_next_buf(port))) { break; } } ubuf = saa7164_vbi_next_buf(port); } } err: if (!ret && !ubuf) { printk(KERN_ERR "%s() EAGAIN\n", __func__); ret = -EAGAIN; } return ret; } static __poll_t fops_poll(struct file *file, poll_table *wait) { struct saa7164_vbi_fh *fh = (struct saa7164_vbi_fh *)file->private_data; struct saa7164_port *port = fh->port; __poll_t mask = 0; port->last_poll_msecs_diff = port->last_poll_msecs; port->last_poll_msecs = jiffies_to_msecs(jiffies); port->last_poll_msecs_diff = port->last_poll_msecs - port->last_poll_msecs_diff; saa7164_histogram_update(&port->poll_interval, port->last_poll_msecs_diff); if (!video_is_registered(port->v4l_device)) return EPOLLERR; if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) { if (atomic_inc_return(&port->v4l_reader_count) == 1) { if (saa7164_vbi_initialize(port) < 0) return EPOLLERR; saa7164_vbi_start_streaming(port); msleep(200); } } /* blocking wait for buffer */ if ((file->f_flags & O_NONBLOCK) == 0) { if (wait_event_interruptible(port->wait_read, saa7164_vbi_next_buf(port))) { return EPOLLERR; } } /* Pull the first buffer from the used list */ if (!list_empty(&port->list_buf_used.list)) mask |= EPOLLIN | EPOLLRDNORM; return mask; } static const struct v4l2_file_operations vbi_fops = { .owner = THIS_MODULE, .open = fops_open, .release = fops_release, .read = fops_read, .poll = fops_poll, .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops vbi_ioctl_ops = { .vidioc_s_std = vidioc_s_std, .vidioc_g_std = vidioc_g_std, .vidioc_enum_input = saa7164_enum_input, .vidioc_g_input = vidioc_g_input, .vidioc_s_input = vidioc_s_input, .vidioc_g_tuner = saa7164_g_tuner, .vidioc_s_tuner = saa7164_s_tuner, .vidioc_g_frequency = vidioc_g_frequency, .vidioc_s_frequency = vidioc_s_frequency, .vidioc_querycap = vidioc_querycap, .vidioc_g_fmt_vbi_cap = saa7164_vbi_fmt, .vidioc_try_fmt_vbi_cap = saa7164_vbi_fmt, .vidioc_s_fmt_vbi_cap = saa7164_vbi_fmt, }; static struct video_device saa7164_vbi_template = { .name = "saa7164", .fops = &vbi_fops, .ioctl_ops = &vbi_ioctl_ops, .minor = -1, .tvnorms = SAA7164_NORMS, }; static struct video_device *saa7164_vbi_alloc( struct saa7164_port *port, struct pci_dev *pci, struct video_device *template, char *type) { struct video_device *vfd; struct saa7164_dev *dev = port->dev; dprintk(DBGLVL_VBI, "%s()\n", __func__); vfd = video_device_alloc(); if (NULL == vfd) return NULL; *vfd = *template; snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name, type, saa7164_boards[dev->board].name); vfd->v4l2_dev = &dev->v4l2_dev; vfd->release = video_device_release; return vfd; } int saa7164_vbi_register(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; int result = -ENODEV; dprintk(DBGLVL_VBI, "%s()\n", __func__); if (port->type != SAA7164_MPEG_VBI) BUG(); /* Sanity check that the PCI configuration space is active */ if (port->hwcfg.BARLocation == 0) { printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n", __func__, result); result = -ENOMEM; goto failed; } /* Establish VBI defaults here */ /* Allocate and register the video device node */ port->v4l_device = saa7164_vbi_alloc(port, dev->pci, &saa7164_vbi_template, "vbi"); if (!port->v4l_device) { printk(KERN_INFO "%s: can't allocate vbi device\n", dev->name); result = -ENOMEM; goto failed; } port->enc_port = &dev->ports[port->nr - 2]; video_set_drvdata(port->v4l_device, port); result = video_register_device(port->v4l_device, VFL_TYPE_VBI, -1); if (result < 0) { printk(KERN_INFO "%s: can't register vbi device\n", dev->name); /* TODO: We're going to leak here if we don't dealloc The buffers above. The unreg function can't deal wit it. */ goto failed; } printk(KERN_INFO "%s: registered device vbi%d [vbi]\n", dev->name, port->v4l_device->num); /* Configure the hardware defaults */ result = 0; failed: return result; } void saa7164_vbi_unregister(struct saa7164_port *port) { struct saa7164_dev *dev = port->dev; dprintk(DBGLVL_VBI, "%s(port=%d)\n", __func__, port->nr); if (port->type != SAA7164_MPEG_VBI) BUG(); if (port->v4l_device) { if (port->v4l_device->minor != -1) video_unregister_device(port->v4l_device); else video_device_release(port->v4l_device); port->v4l_device = NULL; } }
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