1// SPDX-License-Identifier: GPL-2.0-only
2#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
3
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(new: &buf->list, head: &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_INTERLACED
94 : V4L2_FIELD_BOTTOM;
95 else
96 buf->vb.field = vv->video_fmt.field;
97 buf->vb.sequence = vv->seqnr++;
98 vb2_buffer_done(vb: &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(head: &q->queue)) {
113 /* activate next one from queue */
114 buf = list_entry(q->queue.next, struct saa7146_buf, list);
115 list_del(entry: &buf->list);
116 if (!list_empty(head: &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 transfer
129 by lowering the protection address */
130
131 // fixme: fix this for vflip != 0
132
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(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, state: VB2_BUF_STATE_ERROR);
166 }
167
168 /* we don't restart the transfer here like other drivers do. when
169 a streaming capture is disabled, the timeout function will be
170 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 the
173 next capture IMHO... */
174
175 saa7146_buffer_next(dev, q, vbi: 0);
176
177 spin_unlock_irqrestore(lock: &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(lock: 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: &dev->pci->dev, v4l2_dev: &dev->v4l2_dev);
247 if (err)
248 return err;
249
250 v4l2_ctrl_handler_init(hdl, 6);
251 v4l2_ctrl_new_std(hdl, ops: &saa7146_ctrl_ops,
252 V4L2_CID_BRIGHTNESS, min: 0, max: 255, step: 1, def: 128);
253 v4l2_ctrl_new_std(hdl, ops: &saa7146_ctrl_ops,
254 V4L2_CID_CONTRAST, min: 0, max: 127, step: 1, def: 64);
255 v4l2_ctrl_new_std(hdl, ops: &saa7146_ctrl_ops,
256 V4L2_CID_SATURATION, min: 0, max: 127, step: 1, def: 64);
257 v4l2_ctrl_new_std(hdl, ops: &saa7146_ctrl_ops,
258 V4L2_CID_VFLIP, min: 0, max: 1, step: 1, def: 0);
259 v4l2_ctrl_new_std(hdl, ops: &saa7146_ctrl_ops,
260 V4L2_CID_HFLIP, min: 0, max: 1, step: 1, def: 0);
261 if (hdl->error) {
262 err = hdl->error;
263 v4l2_ctrl_handler_free(hdl);
264 v4l2_device_unregister(v4l2_dev: &dev->v4l2_dev);
265 return err;
266 }
267 dev->v4l2_dev.ctrl_handler = hdl;
268
269 vv = kzalloc(size: 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(v4l2_dev: &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 can
289 handle different devices that might need different
290 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(v4l2_dev: &dev->v4l2_dev);
334 v4l2_ctrl_handler_free(hdl: &dev->ctrl_handler);
335 kfree(objp: 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(vdev: vfd, data: dev);
398
399 err = video_register_device(vdev: vfd, type, nr: -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(vdev: 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

source code of linux/drivers/media/common/saa7146/saa7146_fops.c