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1// SPDX-License-Identifier: GPL-2.0-only2#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt3 4#include <media/drv-intf/saa7146_vv.h>5#include <linux/module.h>6 7/****************************************************************************/8/* resource management functions, shamelessly stolen from saa7134 driver */9 10int saa7146_res_get(struct saa7146_dev *dev, unsigned int bit)11{12 struct saa7146_vv *vv = dev->vv_data;13 14 if (vv->resources & bit) {15 DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",16 bit, vv->resources);17 /* have it already allocated */18 return 1;19 }20 21 /* is it free? */22 if (vv->resources & bit) {23 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",24 vv->resources, bit);25 /* no, someone else uses it */26 return 0;27 }28 /* it's free, grab it */29 vv->resources |= bit;30 DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);31 return 1;32}33 34void saa7146_res_free(struct saa7146_dev *dev, unsigned int bits)35{36 struct saa7146_vv *vv = dev->vv_data;37 38 WARN_ON((vv->resources & bits) != bits);39 40 vv->resources &= ~bits;41 DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);42}43 44 45/********************************************************************************/46/* common buffer functions */47 48int saa7146_buffer_queue(struct saa7146_dev *dev,49 struct saa7146_dmaqueue *q,50 struct saa7146_buf *buf)51{52 assert_spin_locked(&dev->slock);53 DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);54 55 if (WARN_ON(!q))56 return -EIO;57 58 if (NULL == q->curr) {59 q->curr = buf;60 DEB_D("immediately activating buffer %p\n", buf);61 buf->activate(dev,buf,NULL);62 } else {63 list_add_tail(&buf->list, &q->queue);64 DEB_D("adding buffer %p to queue. (active buffer present)\n",65 buf);66 }67 return 0;68}69 70void saa7146_buffer_finish(struct saa7146_dev *dev,71 struct saa7146_dmaqueue *q,72 int state)73{74 struct saa7146_vv *vv = dev->vv_data;75 struct saa7146_buf *buf = q->curr;76 77 assert_spin_locked(&dev->slock);78 DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);79 DEB_EE("q->curr:%p\n", q->curr);80 81 /* finish current buffer */82 if (!buf) {83 DEB_D("aiii. no current buffer\n");84 return;85 }86 87 q->curr = NULL;88 buf->vb.vb2_buf.timestamp = ktime_get_ns();89 if (vv->video_fmt.field == V4L2_FIELD_ALTERNATE)90 buf->vb.field = vv->last_field;91 else if (vv->video_fmt.field == V4L2_FIELD_ANY)92 buf->vb.field = (vv->video_fmt.height > vv->standard->v_max_out / 2)93 ? V4L2_FIELD_INTERLACED94 : V4L2_FIELD_BOTTOM;95 else96 buf->vb.field = vv->video_fmt.field;97 buf->vb.sequence = vv->seqnr++;98 vb2_buffer_done(&buf->vb.vb2_buf, state);99}100 101void saa7146_buffer_next(struct saa7146_dev *dev,102 struct saa7146_dmaqueue *q, int vbi)103{104 struct saa7146_buf *buf,*next = NULL;105 106 if (WARN_ON(!q))107 return;108 109 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);110 111 assert_spin_locked(&dev->slock);112 if (!list_empty(&q->queue)) {113 /* activate next one from queue */114 buf = list_entry(q->queue.next, struct saa7146_buf, list);115 list_del(&buf->list);116 if (!list_empty(&q->queue))117 next = list_entry(q->queue.next, struct saa7146_buf, list);118 q->curr = buf;119 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",120 buf, q->queue.prev, q->queue.next);121 buf->activate(dev,buf,next);122 } else {123 DEB_INT("no next buffer. stopping.\n");124 if( 0 != vbi ) {125 /* turn off video-dma3 */126 saa7146_write(dev,MC1, MASK_20);127 } else {128 /* nothing to do -- just prevent next video-dma1 transfer129 by lowering the protection address */130 131 // fixme: fix this for vflip != 0132 133 saa7146_write(dev, PROT_ADDR1, 0);134 saa7146_write(dev, MC2, (MASK_02|MASK_18));135 136 /* write the address of the rps-program */137 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);138 /* turn on rps */139 saa7146_write(dev, MC1, (MASK_12 | MASK_28));140 141/*142 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));143 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));144 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));145 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));146 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));147 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));148*/149 }150 del_timer(&q->timeout);151 }152}153 154void saa7146_buffer_timeout(struct timer_list *t)155{156 struct saa7146_dmaqueue *q = from_timer(q, t, timeout);157 struct saa7146_dev *dev = q->dev;158 unsigned long flags;159 160 DEB_EE("dev:%p, dmaq:%p\n", dev, q);161 162 spin_lock_irqsave(&dev->slock,flags);163 if (q->curr) {164 DEB_D("timeout on %p\n", q->curr);165 saa7146_buffer_finish(dev, q, VB2_BUF_STATE_ERROR);166 }167 168 /* we don't restart the transfer here like other drivers do. when169 a streaming capture is disabled, the timeout function will be170 called for the current buffer. if we activate the next buffer now,171 we mess up our capture logic. if a timeout occurs on another buffer,172 then something is seriously broken before, so no need to buffer the173 next capture IMHO... */174 175 saa7146_buffer_next(dev, q, 0);176 177 spin_unlock_irqrestore(&dev->slock,flags);178}179 180/********************************************************************************/181/* file operations */182 183static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)184{185 struct video_device *vdev = video_devdata(file);186 struct saa7146_dev *dev = video_drvdata(file);187 int ret;188 189 if (vdev->vfl_type != VFL_TYPE_VBI || !dev->ext_vv_data->vbi_fops.write)190 return -EINVAL;191 if (mutex_lock_interruptible(vdev->lock))192 return -ERESTARTSYS;193 ret = dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);194 mutex_unlock(vdev->lock);195 return ret;196}197 198static const struct v4l2_file_operations video_fops =199{200 .owner = THIS_MODULE,201 .open = v4l2_fh_open,202 .release = vb2_fop_release,203 .read = vb2_fop_read,204 .write = fops_write,205 .poll = vb2_fop_poll,206 .mmap = vb2_fop_mmap,207 .unlocked_ioctl = video_ioctl2,208};209 210static void vv_callback(struct saa7146_dev *dev, unsigned long status)211{212 u32 isr = status;213 214 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);215 216 if (0 != (isr & (MASK_27))) {217 DEB_INT("irq: RPS0 (0x%08x)\n", isr);218 saa7146_video_uops.irq_done(dev,isr);219 }220 221 if (0 != (isr & (MASK_28))) {222 u32 mc2 = saa7146_read(dev, MC2);223 if( 0 != (mc2 & MASK_15)) {224 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);225 wake_up(&dev->vv_data->vbi_wq);226 saa7146_write(dev,MC2, MASK_31);227 return;228 }229 DEB_INT("irq: RPS1 (0x%08x)\n", isr);230 saa7146_vbi_uops.irq_done(dev,isr);231 }232}233 234static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {235 .s_ctrl = saa7146_s_ctrl,236};237 238int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)239{240 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;241 struct v4l2_pix_format *fmt;242 struct v4l2_vbi_format *vbi;243 struct saa7146_vv *vv;244 int err;245 246 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);247 if (err)248 return err;249 250 v4l2_ctrl_handler_init(hdl, 6);251 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,252 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);253 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,254 V4L2_CID_CONTRAST, 0, 127, 1, 64);255 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,256 V4L2_CID_SATURATION, 0, 127, 1, 64);257 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,258 V4L2_CID_VFLIP, 0, 1, 1, 0);259 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,260 V4L2_CID_HFLIP, 0, 1, 1, 0);261 if (hdl->error) {262 err = hdl->error;263 v4l2_ctrl_handler_free(hdl);264 v4l2_device_unregister(&dev->v4l2_dev);265 return err;266 }267 dev->v4l2_dev.ctrl_handler = hdl;268 269 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);270 if (vv == NULL) {271 ERR("out of memory. aborting.\n");272 v4l2_ctrl_handler_free(hdl);273 v4l2_device_unregister(&dev->v4l2_dev);274 return -ENOMEM;275 }276 ext_vv->vid_ops = saa7146_video_ioctl_ops;277 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;278 ext_vv->core_ops = &saa7146_video_ioctl_ops;279 280 DEB_EE("dev:%p\n", dev);281 282 /* set default values for video parts of the saa7146 */283 saa7146_write(dev, BCS_CTRL, 0x80400040);284 285 /* enable video-port pins */286 saa7146_write(dev, MC1, (MASK_10 | MASK_26));287 288 /* save per-device extension data (one extension can289 handle different devices that might need different290 configuration data) */291 dev->ext_vv_data = ext_vv;292 293 saa7146_video_uops.init(dev,vv);294 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)295 saa7146_vbi_uops.init(dev,vv);296 297 fmt = &vv->video_fmt;298 fmt->width = 384;299 fmt->height = 288;300 fmt->pixelformat = V4L2_PIX_FMT_BGR24;301 fmt->field = V4L2_FIELD_INTERLACED;302 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;303 fmt->bytesperline = 3 * fmt->width;304 fmt->sizeimage = fmt->bytesperline * fmt->height;305 306 vbi = &vv->vbi_fmt;307 vbi->sampling_rate = 27000000;308 vbi->offset = 248; /* todo */309 vbi->samples_per_line = 720 * 2;310 vbi->sample_format = V4L2_PIX_FMT_GREY;311 312 /* fixme: this only works for PAL */313 vbi->start[0] = 5;314 vbi->count[0] = 16;315 vbi->start[1] = 312;316 vbi->count[1] = 16;317 318 timer_setup(&vv->vbi_read_timeout, NULL, 0);319 320 dev->vv_data = vv;321 dev->vv_callback = &vv_callback;322 323 return 0;324}325EXPORT_SYMBOL_GPL(saa7146_vv_init);326 327int saa7146_vv_release(struct saa7146_dev* dev)328{329 struct saa7146_vv *vv = dev->vv_data;330 331 DEB_EE("dev:%p\n", dev);332 333 v4l2_device_unregister(&dev->v4l2_dev);334 v4l2_ctrl_handler_free(&dev->ctrl_handler);335 kfree(vv);336 dev->vv_data = NULL;337 dev->vv_callback = NULL;338 339 return 0;340}341EXPORT_SYMBOL_GPL(saa7146_vv_release);342 343int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,344 char *name, int type)345{346 struct vb2_queue *q;347 int err;348 int i;349 350 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);351 352 vfd->fops = &video_fops;353 if (type == VFL_TYPE_VIDEO) {354 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;355 q = &dev->vv_data->video_dmaq.q;356 } else {357 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;358 q = &dev->vv_data->vbi_dmaq.q;359 }360 vfd->release = video_device_release_empty;361 vfd->lock = &dev->v4l2_lock;362 vfd->v4l2_dev = &dev->v4l2_dev;363 vfd->tvnorms = 0;364 for (i = 0; i < dev->ext_vv_data->num_stds; i++)365 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;366 strscpy(vfd->name, name, sizeof(vfd->name));367 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE |368 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;369 vfd->device_caps |= dev->ext_vv_data->capabilities;370 if (type == VFL_TYPE_VIDEO) {371 vfd->device_caps &=372 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);373 } else if (vfd->device_caps & V4L2_CAP_SLICED_VBI_OUTPUT) {374 vfd->vfl_dir = VFL_DIR_TX;375 vfd->device_caps &= ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |376 V4L2_CAP_AUDIO | V4L2_CAP_TUNER);377 } else {378 vfd->device_caps &= ~V4L2_CAP_VIDEO_CAPTURE;379 }380 381 q->type = type == VFL_TYPE_VIDEO ? V4L2_BUF_TYPE_VIDEO_CAPTURE : V4L2_BUF_TYPE_VBI_CAPTURE;382 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;383 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;384 q->ops = type == VFL_TYPE_VIDEO ? &video_qops : &vbi_qops;385 q->mem_ops = &vb2_dma_sg_memops;386 q->drv_priv = dev;387 q->gfp_flags = __GFP_DMA32;388 q->buf_struct_size = sizeof(struct saa7146_buf);389 q->lock = &dev->v4l2_lock;390 q->min_queued_buffers = 2;391 q->dev = &dev->pci->dev;392 err = vb2_queue_init(q);393 if (err)394 return err;395 vfd->queue = q;396 397 video_set_drvdata(vfd, dev);398 399 err = video_register_device(vfd, type, -1);400 if (err < 0) {401 ERR("cannot register v4l2 device. skipping.\n");402 return err;403 }404 405 pr_info("%s: registered device %s [v4l2]\n",406 dev->name, video_device_node_name(vfd));407 return 0;408}409EXPORT_SYMBOL_GPL(saa7146_register_device);410 411int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)412{413 DEB_EE("dev:%p\n", dev);414 415 video_unregister_device(vfd);416 return 0;417}418EXPORT_SYMBOL_GPL(saa7146_unregister_device);419 420static int __init saa7146_vv_init_module(void)421{422 return 0;423}424 425 426static void __exit saa7146_vv_cleanup_module(void)427{428}429 430module_init(saa7146_vv_init_module);431module_exit(saa7146_vv_cleanup_module);432 433MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");434MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");435MODULE_LICENSE("GPL");436