1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
4 *
5 * Freescale VIU video driver
6 *
7 * Authors: Hongjun Chen <hong-jun.chen@freescale.com>
8 * Porting to 2.6.35 by DENX Software Engineering,
9 * Anatolij Gustschin <agust@denx.de>
10 */
11
12 #include <linux/module.h>
13 #include <linux/clk.h>
14 #include <linux/kernel.h>
15 #include <linux/i2c.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/io.h>
19 #include <linux/of_address.h>
20 #include <linux/of_irq.h>
21 #include <linux/of_platform.h>
22 #include <linux/slab.h>
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-device.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-fh.h>
28 #include <media/v4l2-event.h>
29 #include <media/videobuf-dma-contig.h>
30
31 #define DRV_NAME "fsl_viu"
32 #define VIU_VERSION "0.5.1"
33
34 /* Allow building this driver with COMPILE_TEST */
35 #if !defined(CONFIG_PPC) && !defined(CONFIG_MICROBLAZE) && !defined(CONFIG_M68K)
36 #define out_be32(v, a) iowrite32be(a, (void __iomem *)v)
37 #define in_be32(a) ioread32be((void __iomem *)a)
38 #endif
39
40 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
41
42 #define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */
43
44 /* I2C address of video decoder chip is 0x4A */
45 #define VIU_VIDEO_DECODER_ADDR 0x25
46
47 static int info_level;
48
49 #define dprintk(level, fmt, arg...) \
50 do { \
51 if (level <= info_level) \
52 printk(KERN_DEBUG "viu: " fmt , ## arg); \
53 } while (0)
54
55 /*
56 * Basic structures
57 */
58 struct viu_fmt {
59 u32 fourcc; /* v4l2 format id */
60 u32 pixelformat;
61 int depth;
62 };
63
64 static struct viu_fmt formats[] = {
65 {
66 .fourcc = V4L2_PIX_FMT_RGB565,
67 .pixelformat = V4L2_PIX_FMT_RGB565,
68 .depth = 16,
69 }, {
70 .fourcc = V4L2_PIX_FMT_RGB32,
71 .pixelformat = V4L2_PIX_FMT_RGB32,
72 .depth = 32,
73 }
74 };
75
76 struct viu_dev;
77 struct viu_buf;
78
79 /* buffer for one video frame */
80 struct viu_buf {
81 /* common v4l buffer stuff -- must be first */
82 struct videobuf_buffer vb;
83 struct viu_fmt *fmt;
84 };
85
86 struct viu_dmaqueue {
87 struct viu_dev *dev;
88 struct list_head active;
89 struct list_head queued;
90 struct timer_list timeout;
91 };
92
93 struct viu_status {
94 u32 field_irq;
95 u32 vsync_irq;
96 u32 hsync_irq;
97 u32 vstart_irq;
98 u32 dma_end_irq;
99 u32 error_irq;
100 };
101
102 struct viu_reg {
103 u32 status_cfg;
104 u32 luminance;
105 u32 chroma_r;
106 u32 chroma_g;
107 u32 chroma_b;
108 u32 field_base_addr;
109 u32 dma_inc;
110 u32 picture_count;
111 u32 req_alarm;
112 u32 alpha;
113 } __attribute__ ((packed));
114
115 struct viu_dev {
116 struct v4l2_device v4l2_dev;
117 struct v4l2_ctrl_handler hdl;
118 struct mutex lock;
119 spinlock_t slock;
120 int users;
121
122 struct device *dev;
123 /* various device info */
124 struct video_device *vdev;
125 struct viu_dmaqueue vidq;
126 enum v4l2_field capfield;
127 int field;
128 int first;
129 int dma_done;
130
131 /* Hardware register area */
132 struct viu_reg __iomem *vr;
133
134 /* Interrupt vector */
135 int irq;
136 struct viu_status irqs;
137
138 /* video overlay */
139 struct v4l2_framebuffer ovbuf;
140 struct viu_fmt *ovfmt;
141 unsigned int ovenable;
142 enum v4l2_field ovfield;
143
144 /* crop */
145 struct v4l2_rect crop_current;
146
147 /* clock pointer */
148 struct clk *clk;
149
150 /* decoder */
151 struct v4l2_subdev *decoder;
152
153 v4l2_std_id std;
154 };
155
156 struct viu_fh {
157 /* must remain the first field of this struct */
158 struct v4l2_fh fh;
159 struct viu_dev *dev;
160
161 /* video capture */
162 struct videobuf_queue vb_vidq;
163 spinlock_t vbq_lock; /* spinlock for the videobuf queue */
164
165 /* video overlay */
166 struct v4l2_window win;
167 struct v4l2_clip clips[1];
168
169 /* video capture */
170 struct viu_fmt *fmt;
171 int width, height, sizeimage;
172 enum v4l2_buf_type type;
173 };
174
175 static struct viu_reg reg_val;
176
177 /*
178 * Macro definitions of VIU registers
179 */
180
181 /* STATUS_CONFIG register */
182 enum status_config {
183 SOFT_RST = 1 << 0,
184
185 ERR_MASK = 0x0f << 4, /* Error code mask */
186 ERR_NO = 0x00, /* No error */
187 ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */
188 ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */
189 ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */
190 ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */
191 ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */
192 ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */
193 ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */
194 ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */
195 ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */
196 ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */
197
198 INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */
199 INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */
200 INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */
201 INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */
202 INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */
203 INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */
204 INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */
205
206 INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */
207 INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */
208 INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */
209 INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */
210 INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */
211 INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */
212
213 DMA_ACT = 0x01 << 27, /* Enable DMA transfer */
214 FIELD_NO = 0x01 << 28, /* Field number */
215 DITHER_ON = 0x01 << 29, /* Dithering is on */
216 ROUND_ON = 0x01 << 30, /* Round is on */
217 MODE_32BIT = 1UL << 31, /* Data in RGBa888,
218 * 0 in RGB565
219 */
220 };
221
222 #define norm_maxw() 720
223 #define norm_maxh() 576
224
225 #define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
226 INT_HSYNC_STATUS | INT_VSTART_STATUS | \
227 INT_DMA_END_STATUS | INT_ERROR_STATUS)
228
229 #define NUM_FORMATS ARRAY_SIZE(formats)
230
231 static irqreturn_t viu_intr(int irq, void *dev_id);
232
format_by_fourcc(int fourcc)233 static struct viu_fmt *format_by_fourcc(int fourcc)
234 {
235 int i;
236
237 for (i = 0; i < NUM_FORMATS; i++) {
238 if (formats[i].pixelformat == fourcc)
239 return formats + i;
240 }
241
242 dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
243 return NULL;
244 }
245
viu_start_dma(struct viu_dev * dev)246 static void viu_start_dma(struct viu_dev *dev)
247 {
248 struct viu_reg __iomem *vr = dev->vr;
249
250 dev->field = 0;
251
252 /* Enable DMA operation */
253 out_be32(&vr->status_cfg, SOFT_RST);
254 out_be32(&vr->status_cfg, INT_FIELD_EN);
255 }
256
viu_stop_dma(struct viu_dev * dev)257 static void viu_stop_dma(struct viu_dev *dev)
258 {
259 struct viu_reg __iomem *vr = dev->vr;
260 int cnt = 100;
261 u32 status_cfg;
262
263 out_be32(&vr->status_cfg, 0);
264
265 /* Clear pending interrupts */
266 status_cfg = in_be32(&vr->status_cfg);
267 if (status_cfg & 0x3f0000)
268 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
269
270 if (status_cfg & DMA_ACT) {
271 do {
272 status_cfg = in_be32(&vr->status_cfg);
273 if (status_cfg & INT_DMA_END_STATUS)
274 break;
275 } while (cnt--);
276
277 if (cnt < 0) {
278 /* timed out, issue soft reset */
279 out_be32(&vr->status_cfg, SOFT_RST);
280 out_be32(&vr->status_cfg, 0);
281 } else {
282 /* clear DMA_END and other pending irqs */
283 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
284 }
285 }
286
287 dev->field = 0;
288 }
289
restart_video_queue(struct viu_dmaqueue * vidq)290 static int restart_video_queue(struct viu_dmaqueue *vidq)
291 {
292 struct viu_buf *buf, *prev;
293
294 dprintk(1, "%s vidq=%p\n", __func__, vidq);
295 if (!list_empty(&vidq->active)) {
296 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
297 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
298 buf, buf->vb.i);
299
300 viu_stop_dma(vidq->dev);
301
302 /* cancel all outstanding capture requests */
303 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
304 list_del(&buf->vb.queue);
305 buf->vb.state = VIDEOBUF_ERROR;
306 wake_up(&buf->vb.done);
307 }
308 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
309 return 0;
310 }
311
312 prev = NULL;
313 for (;;) {
314 if (list_empty(&vidq->queued))
315 return 0;
316 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
317 if (prev == NULL) {
318 list_move_tail(&buf->vb.queue, &vidq->active);
319
320 dprintk(1, "Restarting video dma\n");
321 viu_stop_dma(vidq->dev);
322 viu_start_dma(vidq->dev);
323
324 buf->vb.state = VIDEOBUF_ACTIVE;
325 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
326 dprintk(2, "[%p/%d] restart_queue - first active\n",
327 buf, buf->vb.i);
328
329 } else if (prev->vb.width == buf->vb.width &&
330 prev->vb.height == buf->vb.height &&
331 prev->fmt == buf->fmt) {
332 list_move_tail(&buf->vb.queue, &vidq->active);
333 buf->vb.state = VIDEOBUF_ACTIVE;
334 dprintk(2, "[%p/%d] restart_queue - move to active\n",
335 buf, buf->vb.i);
336 } else {
337 return 0;
338 }
339 prev = buf;
340 }
341 }
342
viu_vid_timeout(struct timer_list * t)343 static void viu_vid_timeout(struct timer_list *t)
344 {
345 struct viu_dev *dev = from_timer(dev, t, vidq.timeout);
346 struct viu_buf *buf;
347 struct viu_dmaqueue *vidq = &dev->vidq;
348
349 while (!list_empty(&vidq->active)) {
350 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
351 list_del(&buf->vb.queue);
352 buf->vb.state = VIDEOBUF_ERROR;
353 wake_up(&buf->vb.done);
354 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
355 }
356
357 restart_video_queue(vidq);
358 }
359
360 /*
361 * Videobuf operations
362 */
buffer_setup(struct videobuf_queue * vq,unsigned int * count,unsigned int * size)363 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
364 unsigned int *size)
365 {
366 struct viu_fh *fh = vq->priv_data;
367
368 *size = fh->width * fh->height * fh->fmt->depth >> 3;
369 if (*count == 0)
370 *count = 32;
371
372 while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
373 (*count)--;
374
375 dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
376 return 0;
377 }
378
free_buffer(struct videobuf_queue * vq,struct viu_buf * buf)379 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
380 {
381 struct videobuf_buffer *vb = &buf->vb;
382 void *vaddr = NULL;
383
384 BUG_ON(in_interrupt());
385
386 videobuf_waiton(vq, &buf->vb, 0, 0);
387
388 if (vq->int_ops && vq->int_ops->vaddr)
389 vaddr = vq->int_ops->vaddr(vb);
390
391 if (vaddr)
392 videobuf_dma_contig_free(vq, &buf->vb);
393
394 buf->vb.state = VIDEOBUF_NEEDS_INIT;
395 }
396
buffer_activate(struct viu_dev * dev,struct viu_buf * buf)397 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
398 {
399 struct viu_reg __iomem *vr = dev->vr;
400 int bpp;
401
402 /* setup the DMA base address */
403 reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
404
405 dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
406 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
407
408 /* interlace is on by default, set horizontal DMA increment */
409 reg_val.status_cfg = 0;
410 bpp = buf->fmt->depth >> 3;
411 switch (bpp) {
412 case 2:
413 reg_val.status_cfg &= ~MODE_32BIT;
414 reg_val.dma_inc = buf->vb.width * 2;
415 break;
416 case 4:
417 reg_val.status_cfg |= MODE_32BIT;
418 reg_val.dma_inc = buf->vb.width * 4;
419 break;
420 default:
421 dprintk(0, "doesn't support color depth(%d)\n",
422 bpp * 8);
423 return -EINVAL;
424 }
425
426 /* setup picture_count register */
427 reg_val.picture_count = (buf->vb.height / 2) << 16 |
428 buf->vb.width;
429
430 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
431
432 buf->vb.state = VIDEOBUF_ACTIVE;
433 dev->capfield = buf->vb.field;
434
435 /* reset dma increment if needed */
436 if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
437 reg_val.dma_inc = 0;
438
439 out_be32(&vr->dma_inc, reg_val.dma_inc);
440 out_be32(&vr->picture_count, reg_val.picture_count);
441 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
442 mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
443 return 0;
444 }
445
buffer_prepare(struct videobuf_queue * vq,struct videobuf_buffer * vb,enum v4l2_field field)446 static int buffer_prepare(struct videobuf_queue *vq,
447 struct videobuf_buffer *vb,
448 enum v4l2_field field)
449 {
450 struct viu_fh *fh = vq->priv_data;
451 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
452 int rc;
453
454 BUG_ON(fh->fmt == NULL);
455
456 if (fh->width < 48 || fh->width > norm_maxw() ||
457 fh->height < 32 || fh->height > norm_maxh())
458 return -EINVAL;
459 buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
460 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
461 return -EINVAL;
462
463 if (buf->fmt != fh->fmt ||
464 buf->vb.width != fh->width ||
465 buf->vb.height != fh->height ||
466 buf->vb.field != field) {
467 buf->fmt = fh->fmt;
468 buf->vb.width = fh->width;
469 buf->vb.height = fh->height;
470 buf->vb.field = field;
471 }
472
473 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
474 rc = videobuf_iolock(vq, &buf->vb, NULL);
475 if (rc != 0)
476 goto fail;
477
478 buf->vb.width = fh->width;
479 buf->vb.height = fh->height;
480 buf->vb.field = field;
481 buf->fmt = fh->fmt;
482 }
483
484 buf->vb.state = VIDEOBUF_PREPARED;
485 return 0;
486
487 fail:
488 free_buffer(vq, buf);
489 return rc;
490 }
491
buffer_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)492 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
493 {
494 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
495 struct viu_fh *fh = vq->priv_data;
496 struct viu_dev *dev = fh->dev;
497 struct viu_dmaqueue *vidq = &dev->vidq;
498 struct viu_buf *prev;
499
500 if (!list_empty(&vidq->queued)) {
501 dprintk(1, "adding vb queue=%p\n", &buf->vb.queue);
502 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
503 vidq, &vidq->queued);
504 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
505 dev, &vidq->queued, vidq->queued.next,
506 vidq->queued.prev);
507 list_add_tail(&buf->vb.queue, &vidq->queued);
508 buf->vb.state = VIDEOBUF_QUEUED;
509 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
510 buf, buf->vb.i);
511 } else if (list_empty(&vidq->active)) {
512 dprintk(1, "adding vb active=%p\n", &buf->vb.queue);
513 list_add_tail(&buf->vb.queue, &vidq->active);
514 buf->vb.state = VIDEOBUF_ACTIVE;
515 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
516 dprintk(2, "[%p/%d] buffer_queue - first active\n",
517 buf, buf->vb.i);
518
519 buffer_activate(dev, buf);
520 } else {
521 dprintk(1, "adding vb queue2=%p\n", &buf->vb.queue);
522 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
523 if (prev->vb.width == buf->vb.width &&
524 prev->vb.height == buf->vb.height &&
525 prev->fmt == buf->fmt) {
526 list_add_tail(&buf->vb.queue, &vidq->active);
527 buf->vb.state = VIDEOBUF_ACTIVE;
528 dprintk(2, "[%p/%d] buffer_queue - append to active\n",
529 buf, buf->vb.i);
530 } else {
531 list_add_tail(&buf->vb.queue, &vidq->queued);
532 buf->vb.state = VIDEOBUF_QUEUED;
533 dprintk(2, "[%p/%d] buffer_queue - first queued\n",
534 buf, buf->vb.i);
535 }
536 }
537 }
538
buffer_release(struct videobuf_queue * vq,struct videobuf_buffer * vb)539 static void buffer_release(struct videobuf_queue *vq,
540 struct videobuf_buffer *vb)
541 {
542 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
543 struct viu_fh *fh = vq->priv_data;
544 struct viu_dev *dev = (struct viu_dev *)fh->dev;
545
546 viu_stop_dma(dev);
547 free_buffer(vq, buf);
548 }
549
550 static const struct videobuf_queue_ops viu_video_qops = {
551 .buf_setup = buffer_setup,
552 .buf_prepare = buffer_prepare,
553 .buf_queue = buffer_queue,
554 .buf_release = buffer_release,
555 };
556
557 /*
558 * IOCTL vidioc handling
559 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)560 static int vidioc_querycap(struct file *file, void *priv,
561 struct v4l2_capability *cap)
562 {
563 strscpy(cap->driver, "viu", sizeof(cap->driver));
564 strscpy(cap->card, "viu", sizeof(cap->card));
565 strscpy(cap->bus_info, "platform:viu", sizeof(cap->bus_info));
566 return 0;
567 }
568
vidioc_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)569 static int vidioc_enum_fmt(struct file *file, void *priv,
570 struct v4l2_fmtdesc *f)
571 {
572 int index = f->index;
573
574 if (f->index >= NUM_FORMATS)
575 return -EINVAL;
576
577 f->pixelformat = formats[index].fourcc;
578 return 0;
579 }
580
vidioc_g_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)581 static int vidioc_g_fmt_cap(struct file *file, void *priv,
582 struct v4l2_format *f)
583 {
584 struct viu_fh *fh = priv;
585
586 f->fmt.pix.width = fh->width;
587 f->fmt.pix.height = fh->height;
588 f->fmt.pix.field = fh->vb_vidq.field;
589 f->fmt.pix.pixelformat = fh->fmt->pixelformat;
590 f->fmt.pix.bytesperline =
591 (f->fmt.pix.width * fh->fmt->depth) >> 3;
592 f->fmt.pix.sizeimage = fh->sizeimage;
593 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
594 return 0;
595 }
596
vidioc_try_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)597 static int vidioc_try_fmt_cap(struct file *file, void *priv,
598 struct v4l2_format *f)
599 {
600 struct viu_fmt *fmt;
601 unsigned int maxw, maxh;
602
603 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
604 if (!fmt) {
605 dprintk(1, "Fourcc format (0x%08x) invalid.",
606 f->fmt.pix.pixelformat);
607 return -EINVAL;
608 }
609
610 maxw = norm_maxw();
611 maxh = norm_maxh();
612
613 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
614 if (f->fmt.pix.height < 32)
615 f->fmt.pix.height = 32;
616 if (f->fmt.pix.height > maxh)
617 f->fmt.pix.height = maxh;
618 if (f->fmt.pix.width < 48)
619 f->fmt.pix.width = 48;
620 if (f->fmt.pix.width > maxw)
621 f->fmt.pix.width = maxw;
622 f->fmt.pix.width &= ~0x03;
623 f->fmt.pix.bytesperline =
624 (f->fmt.pix.width * fmt->depth) >> 3;
625 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
626 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
627
628 return 0;
629 }
630
vidioc_s_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)631 static int vidioc_s_fmt_cap(struct file *file, void *priv,
632 struct v4l2_format *f)
633 {
634 struct viu_fh *fh = priv;
635 int ret;
636
637 ret = vidioc_try_fmt_cap(file, fh, f);
638 if (ret < 0)
639 return ret;
640
641 fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
642 fh->width = f->fmt.pix.width;
643 fh->height = f->fmt.pix.height;
644 fh->sizeimage = f->fmt.pix.sizeimage;
645 fh->vb_vidq.field = f->fmt.pix.field;
646 fh->type = f->type;
647 return 0;
648 }
649
vidioc_g_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)650 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
651 struct v4l2_format *f)
652 {
653 struct viu_fh *fh = priv;
654
655 f->fmt.win = fh->win;
656 return 0;
657 }
658
verify_preview(struct viu_dev * dev,struct v4l2_window * win)659 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
660 {
661 enum v4l2_field field;
662 int maxw, maxh;
663
664 if (dev->ovbuf.base == NULL)
665 return -EINVAL;
666 if (dev->ovfmt == NULL)
667 return -EINVAL;
668 if (win->w.width < 48 || win->w.height < 32)
669 return -EINVAL;
670
671 field = win->field;
672 maxw = dev->crop_current.width;
673 maxh = dev->crop_current.height;
674
675 if (field == V4L2_FIELD_ANY) {
676 field = (win->w.height > maxh/2)
677 ? V4L2_FIELD_INTERLACED
678 : V4L2_FIELD_TOP;
679 }
680 switch (field) {
681 case V4L2_FIELD_TOP:
682 case V4L2_FIELD_BOTTOM:
683 maxh = maxh / 2;
684 break;
685 case V4L2_FIELD_INTERLACED:
686 break;
687 default:
688 return -EINVAL;
689 }
690
691 win->field = field;
692 if (win->w.width > maxw)
693 win->w.width = maxw;
694 if (win->w.height > maxh)
695 win->w.height = maxh;
696 return 0;
697 }
698
viu_activate_overlay(struct viu_reg __iomem * vr)699 inline void viu_activate_overlay(struct viu_reg __iomem *vr)
700 {
701 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
702 out_be32(&vr->dma_inc, reg_val.dma_inc);
703 out_be32(&vr->picture_count, reg_val.picture_count);
704 }
705
viu_setup_preview(struct viu_dev * dev,struct viu_fh * fh)706 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
707 {
708 int bpp;
709
710 dprintk(1, "%s %dx%d\n", __func__,
711 fh->win.w.width, fh->win.w.height);
712
713 reg_val.status_cfg = 0;
714
715 /* setup window */
716 reg_val.picture_count = (fh->win.w.height / 2) << 16 |
717 fh->win.w.width;
718
719 /* setup color depth and dma increment */
720 bpp = dev->ovfmt->depth / 8;
721 switch (bpp) {
722 case 2:
723 reg_val.status_cfg &= ~MODE_32BIT;
724 reg_val.dma_inc = fh->win.w.width * 2;
725 break;
726 case 4:
727 reg_val.status_cfg |= MODE_32BIT;
728 reg_val.dma_inc = fh->win.w.width * 4;
729 break;
730 default:
731 dprintk(0, "device doesn't support color depth(%d)\n",
732 bpp * 8);
733 return -EINVAL;
734 }
735
736 dev->ovfield = fh->win.field;
737 if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
738 reg_val.dma_inc = 0;
739
740 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
741
742 /* setup the base address of the overlay buffer */
743 reg_val.field_base_addr = (u32)(long)dev->ovbuf.base;
744
745 return 0;
746 }
747
vidioc_s_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)748 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
749 struct v4l2_format *f)
750 {
751 struct viu_fh *fh = priv;
752 struct viu_dev *dev = (struct viu_dev *)fh->dev;
753 unsigned long flags;
754 int err;
755
756 err = verify_preview(dev, &f->fmt.win);
757 if (err)
758 return err;
759
760 fh->win = f->fmt.win;
761
762 spin_lock_irqsave(&dev->slock, flags);
763 viu_setup_preview(dev, fh);
764 spin_unlock_irqrestore(&dev->slock, flags);
765 return 0;
766 }
767
vidioc_try_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)768 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
769 struct v4l2_format *f)
770 {
771 return 0;
772 }
773
vidioc_overlay(struct file * file,void * priv,unsigned int on)774 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
775 {
776 struct viu_fh *fh = priv;
777 struct viu_dev *dev = (struct viu_dev *)fh->dev;
778 unsigned long flags;
779
780 if (on) {
781 spin_lock_irqsave(&dev->slock, flags);
782 viu_activate_overlay(dev->vr);
783 dev->ovenable = 1;
784
785 /* start dma */
786 viu_start_dma(dev);
787 spin_unlock_irqrestore(&dev->slock, flags);
788 } else {
789 viu_stop_dma(dev);
790 dev->ovenable = 0;
791 }
792
793 return 0;
794 }
795
vidioc_g_fbuf(struct file * file,void * priv,struct v4l2_framebuffer * arg)796 static int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
797 {
798 struct viu_fh *fh = priv;
799 struct viu_dev *dev = fh->dev;
800 struct v4l2_framebuffer *fb = arg;
801
802 *fb = dev->ovbuf;
803 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
804 return 0;
805 }
806
vidioc_s_fbuf(struct file * file,void * priv,const struct v4l2_framebuffer * arg)807 static int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
808 {
809 struct viu_fh *fh = priv;
810 struct viu_dev *dev = fh->dev;
811 const struct v4l2_framebuffer *fb = arg;
812 struct viu_fmt *fmt;
813
814 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
815 return -EPERM;
816
817 /* check args */
818 fmt = format_by_fourcc(fb->fmt.pixelformat);
819 if (fmt == NULL)
820 return -EINVAL;
821
822 /* ok, accept it */
823 dev->ovbuf = *fb;
824 dev->ovfmt = fmt;
825 if (dev->ovbuf.fmt.bytesperline == 0) {
826 dev->ovbuf.fmt.bytesperline =
827 dev->ovbuf.fmt.width * fmt->depth / 8;
828 }
829 return 0;
830 }
831
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * p)832 static int vidioc_reqbufs(struct file *file, void *priv,
833 struct v4l2_requestbuffers *p)
834 {
835 struct viu_fh *fh = priv;
836
837 return videobuf_reqbufs(&fh->vb_vidq, p);
838 }
839
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * p)840 static int vidioc_querybuf(struct file *file, void *priv,
841 struct v4l2_buffer *p)
842 {
843 struct viu_fh *fh = priv;
844
845 return videobuf_querybuf(&fh->vb_vidq, p);
846 }
847
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * p)848 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
849 {
850 struct viu_fh *fh = priv;
851
852 return videobuf_qbuf(&fh->vb_vidq, p);
853 }
854
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * p)855 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
856 {
857 struct viu_fh *fh = priv;
858
859 return videobuf_dqbuf(&fh->vb_vidq, p,
860 file->f_flags & O_NONBLOCK);
861 }
862
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type i)863 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
864 {
865 struct viu_fh *fh = priv;
866 struct viu_dev *dev = fh->dev;
867
868 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
869 return -EINVAL;
870 if (fh->type != i)
871 return -EINVAL;
872
873 if (dev->ovenable)
874 dev->ovenable = 0;
875
876 viu_start_dma(fh->dev);
877
878 return videobuf_streamon(&fh->vb_vidq);
879 }
880
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type i)881 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
882 {
883 struct viu_fh *fh = priv;
884
885 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
886 return -EINVAL;
887 if (fh->type != i)
888 return -EINVAL;
889
890 viu_stop_dma(fh->dev);
891
892 return videobuf_streamoff(&fh->vb_vidq);
893 }
894
895 #define decoder_call(viu, o, f, args...) \
896 v4l2_subdev_call(viu->decoder, o, f, ##args)
897
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * std_id)898 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
899 {
900 struct viu_fh *fh = priv;
901
902 decoder_call(fh->dev, video, querystd, std_id);
903 return 0;
904 }
905
vidioc_s_std(struct file * file,void * priv,v4l2_std_id id)906 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
907 {
908 struct viu_fh *fh = priv;
909
910 fh->dev->std = id;
911 decoder_call(fh->dev, video, s_std, id);
912 return 0;
913 }
914
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * std_id)915 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
916 {
917 struct viu_fh *fh = priv;
918
919 *std_id = fh->dev->std;
920 return 0;
921 }
922
923 /* only one input in this driver */
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * inp)924 static int vidioc_enum_input(struct file *file, void *priv,
925 struct v4l2_input *inp)
926 {
927 struct viu_fh *fh = priv;
928
929 if (inp->index != 0)
930 return -EINVAL;
931
932 inp->type = V4L2_INPUT_TYPE_CAMERA;
933 inp->std = fh->dev->vdev->tvnorms;
934 strscpy(inp->name, "Camera", sizeof(inp->name));
935 return 0;
936 }
937
vidioc_g_input(struct file * file,void * priv,unsigned int * i)938 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
939 {
940 *i = 0;
941 return 0;
942 }
943
vidioc_s_input(struct file * file,void * priv,unsigned int i)944 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
945 {
946 struct viu_fh *fh = priv;
947
948 if (i)
949 return -EINVAL;
950
951 decoder_call(fh->dev, video, s_routing, i, 0, 0);
952 return 0;
953 }
954
viu_activate_next_buf(struct viu_dev * dev,struct viu_dmaqueue * viuq)955 inline void viu_activate_next_buf(struct viu_dev *dev,
956 struct viu_dmaqueue *viuq)
957 {
958 struct viu_dmaqueue *vidq = viuq;
959 struct viu_buf *buf;
960
961 /* launch another DMA operation for an active/queued buffer */
962 if (!list_empty(&vidq->active)) {
963 buf = list_entry(vidq->active.next, struct viu_buf,
964 vb.queue);
965 dprintk(1, "start another queued buffer: 0x%p\n", buf);
966 buffer_activate(dev, buf);
967 } else if (!list_empty(&vidq->queued)) {
968 buf = list_entry(vidq->queued.next, struct viu_buf,
969 vb.queue);
970 list_del(&buf->vb.queue);
971
972 dprintk(1, "start another queued buffer: 0x%p\n", buf);
973 list_add_tail(&buf->vb.queue, &vidq->active);
974 buf->vb.state = VIDEOBUF_ACTIVE;
975 buffer_activate(dev, buf);
976 }
977 }
978
viu_default_settings(struct viu_reg __iomem * vr)979 inline void viu_default_settings(struct viu_reg __iomem *vr)
980 {
981 out_be32(&vr->luminance, 0x9512A254);
982 out_be32(&vr->chroma_r, 0x03310000);
983 out_be32(&vr->chroma_g, 0x06600F38);
984 out_be32(&vr->chroma_b, 0x00000409);
985 out_be32(&vr->alpha, 0x000000ff);
986 out_be32(&vr->req_alarm, 0x00000090);
987 dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
988 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
989 }
990
viu_overlay_intr(struct viu_dev * dev,u32 status)991 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
992 {
993 struct viu_reg __iomem *vr = dev->vr;
994
995 if (status & INT_DMA_END_STATUS)
996 dev->dma_done = 1;
997
998 if (status & INT_FIELD_STATUS) {
999 if (dev->dma_done) {
1000 u32 addr = reg_val.field_base_addr;
1001
1002 dev->dma_done = 0;
1003 if (status & FIELD_NO)
1004 addr += reg_val.dma_inc;
1005
1006 out_be32(&vr->field_base_addr, addr);
1007 out_be32(&vr->dma_inc, reg_val.dma_inc);
1008 out_be32(&vr->status_cfg,
1009 (status & 0xffc0ffff) |
1010 (status & INT_ALL_STATUS) |
1011 reg_val.status_cfg);
1012 } else if (status & INT_VSYNC_STATUS) {
1013 out_be32(&vr->status_cfg,
1014 (status & 0xffc0ffff) |
1015 (status & INT_ALL_STATUS) |
1016 reg_val.status_cfg);
1017 }
1018 }
1019 }
1020
viu_capture_intr(struct viu_dev * dev,u32 status)1021 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1022 {
1023 struct viu_dmaqueue *vidq = &dev->vidq;
1024 struct viu_reg __iomem *vr = dev->vr;
1025 struct viu_buf *buf;
1026 int field_num;
1027 int need_two;
1028 int dma_done = 0;
1029
1030 field_num = status & FIELD_NO;
1031 need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1032
1033 if (status & INT_DMA_END_STATUS) {
1034 dma_done = 1;
1035 if (((field_num == 0) && (dev->field == 0)) ||
1036 (field_num && (dev->field == 1)))
1037 dev->field++;
1038 }
1039
1040 if (status & INT_FIELD_STATUS) {
1041 dprintk(1, "irq: field %d, done %d\n",
1042 !!field_num, dma_done);
1043 if (unlikely(dev->first)) {
1044 if (field_num == 0) {
1045 dev->first = 0;
1046 dprintk(1, "activate first buf\n");
1047 viu_activate_next_buf(dev, vidq);
1048 } else
1049 dprintk(1, "wait field 0\n");
1050 return;
1051 }
1052
1053 /* setup buffer address for next dma operation */
1054 if (!list_empty(&vidq->active)) {
1055 u32 addr = reg_val.field_base_addr;
1056
1057 if (field_num && need_two) {
1058 addr += reg_val.dma_inc;
1059 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1060 (unsigned long)addr, dev->field);
1061 }
1062 out_be32(&vr->field_base_addr, addr);
1063 out_be32(&vr->dma_inc, reg_val.dma_inc);
1064 out_be32(&vr->status_cfg,
1065 (status & 0xffc0ffff) |
1066 (status & INT_ALL_STATUS) |
1067 reg_val.status_cfg);
1068 return;
1069 }
1070 }
1071
1072 if (dma_done && field_num && (dev->field == 2)) {
1073 dev->field = 0;
1074 buf = list_entry(vidq->active.next,
1075 struct viu_buf, vb.queue);
1076 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1077 buf, buf->vb.i,
1078 (unsigned long)videobuf_to_dma_contig(&buf->vb),
1079 (unsigned long)in_be32(&vr->field_base_addr));
1080
1081 if (waitqueue_active(&buf->vb.done)) {
1082 list_del(&buf->vb.queue);
1083 buf->vb.ts = ktime_get_ns();
1084 buf->vb.state = VIDEOBUF_DONE;
1085 buf->vb.field_count++;
1086 wake_up(&buf->vb.done);
1087 }
1088 /* activate next dma buffer */
1089 viu_activate_next_buf(dev, vidq);
1090 }
1091 }
1092
viu_intr(int irq,void * dev_id)1093 static irqreturn_t viu_intr(int irq, void *dev_id)
1094 {
1095 struct viu_dev *dev = (struct viu_dev *)dev_id;
1096 struct viu_reg __iomem *vr = dev->vr;
1097 u32 status;
1098 u32 error;
1099
1100 status = in_be32(&vr->status_cfg);
1101
1102 if (status & INT_ERROR_STATUS) {
1103 dev->irqs.error_irq++;
1104 error = status & ERR_MASK;
1105 if (error)
1106 dprintk(1, "Err: error(%d), times:%d!\n",
1107 error >> 4, dev->irqs.error_irq);
1108 /* Clear interrupt error bit and error flags */
1109 out_be32(&vr->status_cfg,
1110 (status & 0xffc0ffff) | INT_ERROR_STATUS);
1111 }
1112
1113 if (status & INT_DMA_END_STATUS) {
1114 dev->irqs.dma_end_irq++;
1115 dev->dma_done = 1;
1116 dprintk(2, "VIU DMA end interrupt times: %d\n",
1117 dev->irqs.dma_end_irq);
1118 }
1119
1120 if (status & INT_HSYNC_STATUS)
1121 dev->irqs.hsync_irq++;
1122
1123 if (status & INT_FIELD_STATUS) {
1124 dev->irqs.field_irq++;
1125 dprintk(2, "VIU field interrupt times: %d\n",
1126 dev->irqs.field_irq);
1127 }
1128
1129 if (status & INT_VSTART_STATUS)
1130 dev->irqs.vstart_irq++;
1131
1132 if (status & INT_VSYNC_STATUS) {
1133 dev->irqs.vsync_irq++;
1134 dprintk(2, "VIU vsync interrupt times: %d\n",
1135 dev->irqs.vsync_irq);
1136 }
1137
1138 /* clear all pending irqs */
1139 status = in_be32(&vr->status_cfg);
1140 out_be32(&vr->status_cfg,
1141 (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1142
1143 if (dev->ovenable) {
1144 viu_overlay_intr(dev, status);
1145 return IRQ_HANDLED;
1146 }
1147
1148 /* Capture mode */
1149 viu_capture_intr(dev, status);
1150 return IRQ_HANDLED;
1151 }
1152
1153 /*
1154 * File operations for the device
1155 */
viu_open(struct file * file)1156 static int viu_open(struct file *file)
1157 {
1158 struct video_device *vdev = video_devdata(file);
1159 struct viu_dev *dev = video_get_drvdata(vdev);
1160 struct viu_fh *fh;
1161 struct viu_reg __iomem *vr;
1162 int minor = vdev->minor;
1163 u32 status_cfg;
1164
1165 dprintk(1, "viu: open (minor=%d)\n", minor);
1166
1167 dev->users++;
1168 if (dev->users > 1) {
1169 dev->users--;
1170 return -EBUSY;
1171 }
1172
1173 vr = dev->vr;
1174
1175 dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1176 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1177
1178 if (mutex_lock_interruptible(&dev->lock)) {
1179 dev->users--;
1180 return -ERESTARTSYS;
1181 }
1182
1183 /* allocate and initialize per filehandle data */
1184 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1185 if (!fh) {
1186 dev->users--;
1187 mutex_unlock(&dev->lock);
1188 return -ENOMEM;
1189 }
1190
1191 v4l2_fh_init(&fh->fh, vdev);
1192 file->private_data = fh;
1193 fh->dev = dev;
1194
1195 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1196 fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1197 fh->width = norm_maxw();
1198 fh->height = norm_maxh();
1199 dev->crop_current.width = fh->width;
1200 dev->crop_current.height = fh->height;
1201
1202 dprintk(1, "Open: fh=%p, dev=%p, dev->vidq=%p\n", fh, dev, &dev->vidq);
1203 dprintk(1, "Open: list_empty queued=%d\n",
1204 list_empty(&dev->vidq.queued));
1205 dprintk(1, "Open: list_empty active=%d\n",
1206 list_empty(&dev->vidq.active));
1207
1208 viu_default_settings(vr);
1209
1210 status_cfg = in_be32(&vr->status_cfg);
1211 out_be32(&vr->status_cfg,
1212 status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1213 INT_FIELD_EN | INT_VSTART_EN |
1214 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1215
1216 status_cfg = in_be32(&vr->status_cfg);
1217 out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1218
1219 spin_lock_init(&fh->vbq_lock);
1220 videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1221 dev->dev, &fh->vbq_lock,
1222 fh->type, V4L2_FIELD_INTERLACED,
1223 sizeof(struct viu_buf), fh,
1224 &fh->dev->lock);
1225 v4l2_fh_add(&fh->fh);
1226 mutex_unlock(&dev->lock);
1227 return 0;
1228 }
1229
viu_read(struct file * file,char __user * data,size_t count,loff_t * ppos)1230 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1231 loff_t *ppos)
1232 {
1233 struct viu_fh *fh = file->private_data;
1234 struct viu_dev *dev = fh->dev;
1235 int ret = 0;
1236
1237 dprintk(2, "%s\n", __func__);
1238 if (dev->ovenable)
1239 dev->ovenable = 0;
1240
1241 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1242 if (mutex_lock_interruptible(&dev->lock))
1243 return -ERESTARTSYS;
1244 viu_start_dma(dev);
1245 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1246 ppos, 0, file->f_flags & O_NONBLOCK);
1247 mutex_unlock(&dev->lock);
1248 return ret;
1249 }
1250 return 0;
1251 }
1252
viu_poll(struct file * file,struct poll_table_struct * wait)1253 static __poll_t viu_poll(struct file *file, struct poll_table_struct *wait)
1254 {
1255 struct viu_fh *fh = file->private_data;
1256 struct videobuf_queue *q = &fh->vb_vidq;
1257 struct viu_dev *dev = fh->dev;
1258 __poll_t req_events = poll_requested_events(wait);
1259 __poll_t res = v4l2_ctrl_poll(file, wait);
1260
1261 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1262 return EPOLLERR;
1263
1264 if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
1265 return res;
1266
1267 mutex_lock(&dev->lock);
1268 res |= videobuf_poll_stream(file, q, wait);
1269 mutex_unlock(&dev->lock);
1270 return res;
1271 }
1272
viu_release(struct file * file)1273 static int viu_release(struct file *file)
1274 {
1275 struct viu_fh *fh = file->private_data;
1276 struct viu_dev *dev = fh->dev;
1277 int minor = video_devdata(file)->minor;
1278
1279 mutex_lock(&dev->lock);
1280 viu_stop_dma(dev);
1281 videobuf_stop(&fh->vb_vidq);
1282 videobuf_mmap_free(&fh->vb_vidq);
1283 v4l2_fh_del(&fh->fh);
1284 v4l2_fh_exit(&fh->fh);
1285 mutex_unlock(&dev->lock);
1286
1287 kfree(fh);
1288
1289 dev->users--;
1290 dprintk(1, "close (minor=%d, users=%d)\n",
1291 minor, dev->users);
1292 return 0;
1293 }
1294
viu_reset(struct viu_reg __iomem * reg)1295 static void viu_reset(struct viu_reg __iomem *reg)
1296 {
1297 out_be32(®->status_cfg, 0);
1298 out_be32(®->luminance, 0x9512a254);
1299 out_be32(®->chroma_r, 0x03310000);
1300 out_be32(®->chroma_g, 0x06600f38);
1301 out_be32(®->chroma_b, 0x00000409);
1302 out_be32(®->field_base_addr, 0);
1303 out_be32(®->dma_inc, 0);
1304 out_be32(®->picture_count, 0x01e002d0);
1305 out_be32(®->req_alarm, 0x00000090);
1306 out_be32(®->alpha, 0x000000ff);
1307 }
1308
viu_mmap(struct file * file,struct vm_area_struct * vma)1309 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1310 {
1311 struct viu_fh *fh = file->private_data;
1312 struct viu_dev *dev = fh->dev;
1313 int ret;
1314
1315 dprintk(1, "mmap called, vma=%p\n", vma);
1316
1317 if (mutex_lock_interruptible(&dev->lock))
1318 return -ERESTARTSYS;
1319 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1320 mutex_unlock(&dev->lock);
1321
1322 dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1323 (unsigned long)vma->vm_start,
1324 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1325 ret);
1326
1327 return ret;
1328 }
1329
1330 static const struct v4l2_file_operations viu_fops = {
1331 .owner = THIS_MODULE,
1332 .open = viu_open,
1333 .release = viu_release,
1334 .read = viu_read,
1335 .poll = viu_poll,
1336 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1337 .mmap = viu_mmap,
1338 };
1339
1340 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1341 .vidioc_querycap = vidioc_querycap,
1342 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
1343 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap,
1344 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
1345 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
1346 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1347 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1348 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1349 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1350 .vidioc_overlay = vidioc_overlay,
1351 .vidioc_g_fbuf = vidioc_g_fbuf,
1352 .vidioc_s_fbuf = vidioc_s_fbuf,
1353 .vidioc_reqbufs = vidioc_reqbufs,
1354 .vidioc_querybuf = vidioc_querybuf,
1355 .vidioc_qbuf = vidioc_qbuf,
1356 .vidioc_dqbuf = vidioc_dqbuf,
1357 .vidioc_g_std = vidioc_g_std,
1358 .vidioc_s_std = vidioc_s_std,
1359 .vidioc_querystd = vidioc_querystd,
1360 .vidioc_enum_input = vidioc_enum_input,
1361 .vidioc_g_input = vidioc_g_input,
1362 .vidioc_s_input = vidioc_s_input,
1363 .vidioc_streamon = vidioc_streamon,
1364 .vidioc_streamoff = vidioc_streamoff,
1365 .vidioc_log_status = v4l2_ctrl_log_status,
1366 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1367 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1368 };
1369
1370 static const struct video_device viu_template = {
1371 .name = "FSL viu",
1372 .fops = &viu_fops,
1373 .minor = -1,
1374 .ioctl_ops = &viu_ioctl_ops,
1375 .release = video_device_release,
1376
1377 .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1378 .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
1379 V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_READWRITE,
1380 };
1381
viu_of_probe(struct platform_device * op)1382 static int viu_of_probe(struct platform_device *op)
1383 {
1384 struct viu_dev *viu_dev;
1385 struct video_device *vdev;
1386 struct resource r;
1387 struct viu_reg __iomem *viu_regs;
1388 struct i2c_adapter *ad;
1389 int ret, viu_irq;
1390 struct clk *clk;
1391
1392 ret = of_address_to_resource(op->dev.of_node, 0, &r);
1393 if (ret) {
1394 dev_err(&op->dev, "Can't parse device node resource\n");
1395 return -ENODEV;
1396 }
1397
1398 viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1399 if (!viu_irq) {
1400 dev_err(&op->dev, "Error while mapping the irq\n");
1401 return -EINVAL;
1402 }
1403
1404 /* request mem region */
1405 if (!devm_request_mem_region(&op->dev, r.start,
1406 sizeof(struct viu_reg), DRV_NAME)) {
1407 dev_err(&op->dev, "Error while requesting mem region\n");
1408 ret = -EBUSY;
1409 goto err_irq;
1410 }
1411
1412 /* remap registers */
1413 viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1414 if (!viu_regs) {
1415 dev_err(&op->dev, "Can't map register set\n");
1416 ret = -ENOMEM;
1417 goto err_irq;
1418 }
1419
1420 /* Prepare our private structure */
1421 viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1422 if (!viu_dev) {
1423 dev_err(&op->dev, "Can't allocate private structure\n");
1424 ret = -ENOMEM;
1425 goto err_irq;
1426 }
1427
1428 viu_dev->vr = viu_regs;
1429 viu_dev->irq = viu_irq;
1430 viu_dev->dev = &op->dev;
1431
1432 /* init video dma queues */
1433 INIT_LIST_HEAD(&viu_dev->vidq.active);
1434 INIT_LIST_HEAD(&viu_dev->vidq.queued);
1435
1436 snprintf(viu_dev->v4l2_dev.name,
1437 sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1438 ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1439 if (ret < 0) {
1440 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1441 goto err_irq;
1442 }
1443
1444 ad = i2c_get_adapter(0);
1445 if (!ad) {
1446 ret = -EFAULT;
1447 dev_err(&op->dev, "couldn't get i2c adapter\n");
1448 goto err_v4l2;
1449 }
1450
1451 v4l2_ctrl_handler_init(&viu_dev->hdl, 5);
1452 if (viu_dev->hdl.error) {
1453 ret = viu_dev->hdl.error;
1454 dev_err(&op->dev, "couldn't register control\n");
1455 goto err_i2c;
1456 }
1457 /* This control handler will inherit the control(s) from the
1458 sub-device(s). */
1459 viu_dev->v4l2_dev.ctrl_handler = &viu_dev->hdl;
1460 viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1461 "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1462
1463 timer_setup(&viu_dev->vidq.timeout, viu_vid_timeout, 0);
1464 viu_dev->std = V4L2_STD_NTSC_M;
1465 viu_dev->first = 1;
1466
1467 /* Allocate memory for video device */
1468 vdev = video_device_alloc();
1469 if (vdev == NULL) {
1470 ret = -ENOMEM;
1471 goto err_hdl;
1472 }
1473
1474 *vdev = viu_template;
1475
1476 vdev->v4l2_dev = &viu_dev->v4l2_dev;
1477
1478 viu_dev->vdev = vdev;
1479
1480 /* initialize locks */
1481 mutex_init(&viu_dev->lock);
1482 viu_dev->vdev->lock = &viu_dev->lock;
1483 spin_lock_init(&viu_dev->slock);
1484
1485 video_set_drvdata(viu_dev->vdev, viu_dev);
1486
1487 mutex_lock(&viu_dev->lock);
1488
1489 ret = video_register_device(viu_dev->vdev, VFL_TYPE_VIDEO, -1);
1490 if (ret < 0) {
1491 video_device_release(viu_dev->vdev);
1492 goto err_unlock;
1493 }
1494
1495 /* enable VIU clock */
1496 clk = devm_clk_get(&op->dev, "ipg");
1497 if (IS_ERR(clk)) {
1498 dev_err(&op->dev, "failed to lookup the clock!\n");
1499 ret = PTR_ERR(clk);
1500 goto err_vdev;
1501 }
1502 ret = clk_prepare_enable(clk);
1503 if (ret) {
1504 dev_err(&op->dev, "failed to enable the clock!\n");
1505 goto err_vdev;
1506 }
1507 viu_dev->clk = clk;
1508
1509 /* reset VIU module */
1510 viu_reset(viu_dev->vr);
1511
1512 /* install interrupt handler */
1513 if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1514 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1515 ret = -ENODEV;
1516 goto err_clk;
1517 }
1518
1519 mutex_unlock(&viu_dev->lock);
1520
1521 dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1522 return ret;
1523
1524 err_clk:
1525 clk_disable_unprepare(viu_dev->clk);
1526 err_vdev:
1527 video_unregister_device(viu_dev->vdev);
1528 err_unlock:
1529 mutex_unlock(&viu_dev->lock);
1530 err_hdl:
1531 v4l2_ctrl_handler_free(&viu_dev->hdl);
1532 err_i2c:
1533 i2c_put_adapter(ad);
1534 err_v4l2:
1535 v4l2_device_unregister(&viu_dev->v4l2_dev);
1536 err_irq:
1537 irq_dispose_mapping(viu_irq);
1538 return ret;
1539 }
1540
viu_of_remove(struct platform_device * op)1541 static int viu_of_remove(struct platform_device *op)
1542 {
1543 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1544 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1545 struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1546 struct v4l2_subdev, list);
1547 struct i2c_client *client = v4l2_get_subdevdata(sdev);
1548
1549 free_irq(dev->irq, (void *)dev);
1550 irq_dispose_mapping(dev->irq);
1551
1552 clk_disable_unprepare(dev->clk);
1553
1554 v4l2_ctrl_handler_free(&dev->hdl);
1555 video_unregister_device(dev->vdev);
1556 i2c_put_adapter(client->adapter);
1557 v4l2_device_unregister(&dev->v4l2_dev);
1558 return 0;
1559 }
1560
1561 #ifdef CONFIG_PM
viu_suspend(struct platform_device * op,pm_message_t state)1562 static int viu_suspend(struct platform_device *op, pm_message_t state)
1563 {
1564 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1565 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1566
1567 clk_disable(dev->clk);
1568 return 0;
1569 }
1570
viu_resume(struct platform_device * op)1571 static int viu_resume(struct platform_device *op)
1572 {
1573 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1574 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1575
1576 clk_enable(dev->clk);
1577 return 0;
1578 }
1579 #endif
1580
1581 /*
1582 * Initialization and module stuff
1583 */
1584 static const struct of_device_id mpc512x_viu_of_match[] = {
1585 {
1586 .compatible = "fsl,mpc5121-viu",
1587 },
1588 {},
1589 };
1590 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1591
1592 static struct platform_driver viu_of_platform_driver = {
1593 .probe = viu_of_probe,
1594 .remove = viu_of_remove,
1595 #ifdef CONFIG_PM
1596 .suspend = viu_suspend,
1597 .resume = viu_resume,
1598 #endif
1599 .driver = {
1600 .name = DRV_NAME,
1601 .of_match_table = mpc512x_viu_of_match,
1602 },
1603 };
1604
1605 module_platform_driver(viu_of_platform_driver);
1606
1607 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1608 MODULE_AUTHOR("Hongjun Chen");
1609 MODULE_LICENSE("GPL");
1610 MODULE_VERSION(VIU_VERSION);
1611
