1 /*
2 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
3 *
4 * Freescale VIU video driver
5 *
6 * Authors: Hongjun Chen <hong-jun.chen@freescale.com>
7 * Porting to 2.6.35 by DENX Software Engineering,
8 * Anatolij Gustschin <agust@denx.de>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16
17 #include <linux/module.h>
18 #include <linux/clk.h>
19 #include <linux/kernel.h>
20 #include <linux/i2c.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/io.h>
24 #include <linux/of_address.h>
25 #include <linux/of_irq.h>
26 #include <linux/of_platform.h>
27 #include <linux/slab.h>
28 #include <media/v4l2-common.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-fh.h>
33 #include <media/v4l2-event.h>
34 #include <media/videobuf-dma-contig.h>
35
36 #define DRV_NAME "fsl_viu"
37 #define VIU_VERSION "0.5.1"
38
39 /* Allow building this driver with COMPILE_TEST */
40 #ifndef CONFIG_PPC
41 #define out_be32(v, a) iowrite32be(a, (void __iomem *)v)
42 #define in_be32(a) ioread32be((void __iomem *)a)
43 #endif
44
45 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
46
47 #define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */
48
49 /* I2C address of video decoder chip is 0x4A */
50 #define VIU_VIDEO_DECODER_ADDR 0x25
51
52 static int info_level;
53
54 #define dprintk(level, fmt, arg...) \
55 do { \
56 if (level <= info_level) \
57 printk(KERN_DEBUG "viu: " fmt , ## arg); \
58 } while (0)
59
60 /*
61 * Basic structures
62 */
63 struct viu_fmt {
64 u32 fourcc; /* v4l2 format id */
65 u32 pixelformat;
66 int depth;
67 };
68
69 static struct viu_fmt formats[] = {
70 {
71 .fourcc = V4L2_PIX_FMT_RGB565,
72 .pixelformat = V4L2_PIX_FMT_RGB565,
73 .depth = 16,
74 }, {
75 .fourcc = V4L2_PIX_FMT_RGB32,
76 .pixelformat = V4L2_PIX_FMT_RGB32,
77 .depth = 32,
78 }
79 };
80
81 struct viu_dev;
82 struct viu_buf;
83
84 /* buffer for one video frame */
85 struct viu_buf {
86 /* common v4l buffer stuff -- must be first */
87 struct videobuf_buffer vb;
88 struct viu_fmt *fmt;
89 };
90
91 struct viu_dmaqueue {
92 struct viu_dev *dev;
93 struct list_head active;
94 struct list_head queued;
95 struct timer_list timeout;
96 };
97
98 struct viu_status {
99 u32 field_irq;
100 u32 vsync_irq;
101 u32 hsync_irq;
102 u32 vstart_irq;
103 u32 dma_end_irq;
104 u32 error_irq;
105 };
106
107 struct viu_reg {
108 u32 status_cfg;
109 u32 luminance;
110 u32 chroma_r;
111 u32 chroma_g;
112 u32 chroma_b;
113 u32 field_base_addr;
114 u32 dma_inc;
115 u32 picture_count;
116 u32 req_alarm;
117 u32 alpha;
118 } __attribute__ ((packed));
119
120 struct viu_dev {
121 struct v4l2_device v4l2_dev;
122 struct v4l2_ctrl_handler hdl;
123 struct mutex lock;
124 spinlock_t slock;
125 int users;
126
127 struct device *dev;
128 /* various device info */
129 struct video_device *vdev;
130 struct viu_dmaqueue vidq;
131 enum v4l2_field capfield;
132 int field;
133 int first;
134 int dma_done;
135
136 /* Hardware register area */
137 struct viu_reg __iomem *vr;
138
139 /* Interrupt vector */
140 int irq;
141 struct viu_status irqs;
142
143 /* video overlay */
144 struct v4l2_framebuffer ovbuf;
145 struct viu_fmt *ovfmt;
146 unsigned int ovenable;
147 enum v4l2_field ovfield;
148
149 /* crop */
150 struct v4l2_rect crop_current;
151
152 /* clock pointer */
153 struct clk *clk;
154
155 /* decoder */
156 struct v4l2_subdev *decoder;
157
158 v4l2_std_id std;
159 };
160
161 struct viu_fh {
162 /* must remain the first field of this struct */
163 struct v4l2_fh fh;
164 struct viu_dev *dev;
165
166 /* video capture */
167 struct videobuf_queue vb_vidq;
168 spinlock_t vbq_lock; /* spinlock for the videobuf queue */
169
170 /* video overlay */
171 struct v4l2_window win;
172 struct v4l2_clip clips[1];
173
174 /* video capture */
175 struct viu_fmt *fmt;
176 int width, height, sizeimage;
177 enum v4l2_buf_type type;
178 };
179
180 static struct viu_reg reg_val;
181
182 /*
183 * Macro definitions of VIU registers
184 */
185
186 /* STATUS_CONFIG register */
187 enum status_config {
188 SOFT_RST = 1 << 0,
189
190 ERR_MASK = 0x0f << 4, /* Error code mask */
191 ERR_NO = 0x00, /* No error */
192 ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */
193 ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */
194 ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */
195 ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */
196 ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */
197 ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */
198 ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */
199 ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */
200 ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */
201 ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */
202
203 INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */
204 INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */
205 INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */
206 INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */
207 INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */
208 INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */
209 INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */
210
211 INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */
212 INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */
213 INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */
214 INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */
215 INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */
216 INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */
217
218 DMA_ACT = 0x01 << 27, /* Enable DMA transfer */
219 FIELD_NO = 0x01 << 28, /* Field number */
220 DITHER_ON = 0x01 << 29, /* Dithering is on */
221 ROUND_ON = 0x01 << 30, /* Round is on */
222 MODE_32BIT = 0x01 << 31, /* Data in RGBa888,
223 * 0 in RGB565
224 */
225 };
226
227 #define norm_maxw() 720
228 #define norm_maxh() 576
229
230 #define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
231 INT_HSYNC_STATUS | INT_VSTART_STATUS | \
232 INT_DMA_END_STATUS | INT_ERROR_STATUS)
233
234 #define NUM_FORMATS ARRAY_SIZE(formats)
235
236 static irqreturn_t viu_intr(int irq, void *dev_id);
237
format_by_fourcc(int fourcc)238 static struct viu_fmt *format_by_fourcc(int fourcc)
239 {
240 int i;
241
242 for (i = 0; i < NUM_FORMATS; i++) {
243 if (formats[i].pixelformat == fourcc)
244 return formats + i;
245 }
246
247 dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
248 return NULL;
249 }
250
viu_start_dma(struct viu_dev * dev)251 static void viu_start_dma(struct viu_dev *dev)
252 {
253 struct viu_reg __iomem *vr = dev->vr;
254
255 dev->field = 0;
256
257 /* Enable DMA operation */
258 out_be32(&vr->status_cfg, SOFT_RST);
259 out_be32(&vr->status_cfg, INT_FIELD_EN);
260 }
261
viu_stop_dma(struct viu_dev * dev)262 static void viu_stop_dma(struct viu_dev *dev)
263 {
264 struct viu_reg __iomem *vr = dev->vr;
265 int cnt = 100;
266 u32 status_cfg;
267
268 out_be32(&vr->status_cfg, 0);
269
270 /* Clear pending interrupts */
271 status_cfg = in_be32(&vr->status_cfg);
272 if (status_cfg & 0x3f0000)
273 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
274
275 if (status_cfg & DMA_ACT) {
276 do {
277 status_cfg = in_be32(&vr->status_cfg);
278 if (status_cfg & INT_DMA_END_STATUS)
279 break;
280 } while (cnt--);
281
282 if (cnt < 0) {
283 /* timed out, issue soft reset */
284 out_be32(&vr->status_cfg, SOFT_RST);
285 out_be32(&vr->status_cfg, 0);
286 } else {
287 /* clear DMA_END and other pending irqs */
288 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
289 }
290 }
291
292 dev->field = 0;
293 }
294
restart_video_queue(struct viu_dmaqueue * vidq)295 static int restart_video_queue(struct viu_dmaqueue *vidq)
296 {
297 struct viu_buf *buf, *prev;
298
299 dprintk(1, "%s vidq=%p\n", __func__, vidq);
300 if (!list_empty(&vidq->active)) {
301 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
302 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
303 buf, buf->vb.i);
304
305 viu_stop_dma(vidq->dev);
306
307 /* cancel all outstanding capture requests */
308 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
309 list_del(&buf->vb.queue);
310 buf->vb.state = VIDEOBUF_ERROR;
311 wake_up(&buf->vb.done);
312 }
313 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
314 return 0;
315 }
316
317 prev = NULL;
318 for (;;) {
319 if (list_empty(&vidq->queued))
320 return 0;
321 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
322 if (prev == NULL) {
323 list_move_tail(&buf->vb.queue, &vidq->active);
324
325 dprintk(1, "Restarting video dma\n");
326 viu_stop_dma(vidq->dev);
327 viu_start_dma(vidq->dev);
328
329 buf->vb.state = VIDEOBUF_ACTIVE;
330 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
331 dprintk(2, "[%p/%d] restart_queue - first active\n",
332 buf, buf->vb.i);
333
334 } else if (prev->vb.width == buf->vb.width &&
335 prev->vb.height == buf->vb.height &&
336 prev->fmt == buf->fmt) {
337 list_move_tail(&buf->vb.queue, &vidq->active);
338 buf->vb.state = VIDEOBUF_ACTIVE;
339 dprintk(2, "[%p/%d] restart_queue - move to active\n",
340 buf, buf->vb.i);
341 } else {
342 return 0;
343 }
344 prev = buf;
345 }
346 }
347
viu_vid_timeout(struct timer_list * t)348 static void viu_vid_timeout(struct timer_list *t)
349 {
350 struct viu_dev *dev = from_timer(dev, t, vidq.timeout);
351 struct viu_buf *buf;
352 struct viu_dmaqueue *vidq = &dev->vidq;
353
354 while (!list_empty(&vidq->active)) {
355 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
356 list_del(&buf->vb.queue);
357 buf->vb.state = VIDEOBUF_ERROR;
358 wake_up(&buf->vb.done);
359 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
360 }
361
362 restart_video_queue(vidq);
363 }
364
365 /*
366 * Videobuf operations
367 */
buffer_setup(struct videobuf_queue * vq,unsigned int * count,unsigned int * size)368 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
369 unsigned int *size)
370 {
371 struct viu_fh *fh = vq->priv_data;
372
373 *size = fh->width * fh->height * fh->fmt->depth >> 3;
374 if (*count == 0)
375 *count = 32;
376
377 while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
378 (*count)--;
379
380 dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
381 return 0;
382 }
383
free_buffer(struct videobuf_queue * vq,struct viu_buf * buf)384 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
385 {
386 struct videobuf_buffer *vb = &buf->vb;
387 void *vaddr = NULL;
388
389 BUG_ON(in_interrupt());
390
391 videobuf_waiton(vq, &buf->vb, 0, 0);
392
393 if (vq->int_ops && vq->int_ops->vaddr)
394 vaddr = vq->int_ops->vaddr(vb);
395
396 if (vaddr)
397 videobuf_dma_contig_free(vq, &buf->vb);
398
399 buf->vb.state = VIDEOBUF_NEEDS_INIT;
400 }
401
buffer_activate(struct viu_dev * dev,struct viu_buf * buf)402 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
403 {
404 struct viu_reg __iomem *vr = dev->vr;
405 int bpp;
406
407 /* setup the DMA base address */
408 reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
409
410 dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
411 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
412
413 /* interlace is on by default, set horizontal DMA increment */
414 reg_val.status_cfg = 0;
415 bpp = buf->fmt->depth >> 3;
416 switch (bpp) {
417 case 2:
418 reg_val.status_cfg &= ~MODE_32BIT;
419 reg_val.dma_inc = buf->vb.width * 2;
420 break;
421 case 4:
422 reg_val.status_cfg |= MODE_32BIT;
423 reg_val.dma_inc = buf->vb.width * 4;
424 break;
425 default:
426 dprintk(0, "doesn't support color depth(%d)\n",
427 bpp * 8);
428 return -EINVAL;
429 }
430
431 /* setup picture_count register */
432 reg_val.picture_count = (buf->vb.height / 2) << 16 |
433 buf->vb.width;
434
435 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
436
437 buf->vb.state = VIDEOBUF_ACTIVE;
438 dev->capfield = buf->vb.field;
439
440 /* reset dma increment if needed */
441 if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
442 reg_val.dma_inc = 0;
443
444 out_be32(&vr->dma_inc, reg_val.dma_inc);
445 out_be32(&vr->picture_count, reg_val.picture_count);
446 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
447 mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
448 return 0;
449 }
450
buffer_prepare(struct videobuf_queue * vq,struct videobuf_buffer * vb,enum v4l2_field field)451 static int buffer_prepare(struct videobuf_queue *vq,
452 struct videobuf_buffer *vb,
453 enum v4l2_field field)
454 {
455 struct viu_fh *fh = vq->priv_data;
456 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
457 int rc;
458
459 BUG_ON(fh->fmt == NULL);
460
461 if (fh->width < 48 || fh->width > norm_maxw() ||
462 fh->height < 32 || fh->height > norm_maxh())
463 return -EINVAL;
464 buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
465 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
466 return -EINVAL;
467
468 if (buf->fmt != fh->fmt ||
469 buf->vb.width != fh->width ||
470 buf->vb.height != fh->height ||
471 buf->vb.field != field) {
472 buf->fmt = fh->fmt;
473 buf->vb.width = fh->width;
474 buf->vb.height = fh->height;
475 buf->vb.field = field;
476 }
477
478 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
479 rc = videobuf_iolock(vq, &buf->vb, NULL);
480 if (rc != 0)
481 goto fail;
482
483 buf->vb.width = fh->width;
484 buf->vb.height = fh->height;
485 buf->vb.field = field;
486 buf->fmt = fh->fmt;
487 }
488
489 buf->vb.state = VIDEOBUF_PREPARED;
490 return 0;
491
492 fail:
493 free_buffer(vq, buf);
494 return rc;
495 }
496
buffer_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)497 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
498 {
499 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
500 struct viu_fh *fh = vq->priv_data;
501 struct viu_dev *dev = fh->dev;
502 struct viu_dmaqueue *vidq = &dev->vidq;
503 struct viu_buf *prev;
504
505 if (!list_empty(&vidq->queued)) {
506 dprintk(1, "adding vb queue=%p\n", &buf->vb.queue);
507 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
508 vidq, &vidq->queued);
509 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
510 dev, &vidq->queued, vidq->queued.next,
511 vidq->queued.prev);
512 list_add_tail(&buf->vb.queue, &vidq->queued);
513 buf->vb.state = VIDEOBUF_QUEUED;
514 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
515 buf, buf->vb.i);
516 } else if (list_empty(&vidq->active)) {
517 dprintk(1, "adding vb active=%p\n", &buf->vb.queue);
518 list_add_tail(&buf->vb.queue, &vidq->active);
519 buf->vb.state = VIDEOBUF_ACTIVE;
520 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
521 dprintk(2, "[%p/%d] buffer_queue - first active\n",
522 buf, buf->vb.i);
523
524 buffer_activate(dev, buf);
525 } else {
526 dprintk(1, "adding vb queue2=%p\n", &buf->vb.queue);
527 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
528 if (prev->vb.width == buf->vb.width &&
529 prev->vb.height == buf->vb.height &&
530 prev->fmt == buf->fmt) {
531 list_add_tail(&buf->vb.queue, &vidq->active);
532 buf->vb.state = VIDEOBUF_ACTIVE;
533 dprintk(2, "[%p/%d] buffer_queue - append to active\n",
534 buf, buf->vb.i);
535 } else {
536 list_add_tail(&buf->vb.queue, &vidq->queued);
537 buf->vb.state = VIDEOBUF_QUEUED;
538 dprintk(2, "[%p/%d] buffer_queue - first queued\n",
539 buf, buf->vb.i);
540 }
541 }
542 }
543
buffer_release(struct videobuf_queue * vq,struct videobuf_buffer * vb)544 static void buffer_release(struct videobuf_queue *vq,
545 struct videobuf_buffer *vb)
546 {
547 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
548 struct viu_fh *fh = vq->priv_data;
549 struct viu_dev *dev = (struct viu_dev *)fh->dev;
550
551 viu_stop_dma(dev);
552 free_buffer(vq, buf);
553 }
554
555 static const struct videobuf_queue_ops viu_video_qops = {
556 .buf_setup = buffer_setup,
557 .buf_prepare = buffer_prepare,
558 .buf_queue = buffer_queue,
559 .buf_release = buffer_release,
560 };
561
562 /*
563 * IOCTL vidioc handling
564 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)565 static int vidioc_querycap(struct file *file, void *priv,
566 struct v4l2_capability *cap)
567 {
568 strcpy(cap->driver, "viu");
569 strcpy(cap->card, "viu");
570 strcpy(cap->bus_info, "platform:viu");
571 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
572 V4L2_CAP_STREAMING |
573 V4L2_CAP_VIDEO_OVERLAY |
574 V4L2_CAP_READWRITE;
575 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
576 return 0;
577 }
578
vidioc_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)579 static int vidioc_enum_fmt(struct file *file, void *priv,
580 struct v4l2_fmtdesc *f)
581 {
582 int index = f->index;
583
584 if (f->index >= NUM_FORMATS)
585 return -EINVAL;
586
587 f->pixelformat = formats[index].fourcc;
588 return 0;
589 }
590
vidioc_g_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)591 static int vidioc_g_fmt_cap(struct file *file, void *priv,
592 struct v4l2_format *f)
593 {
594 struct viu_fh *fh = priv;
595
596 f->fmt.pix.width = fh->width;
597 f->fmt.pix.height = fh->height;
598 f->fmt.pix.field = fh->vb_vidq.field;
599 f->fmt.pix.pixelformat = fh->fmt->pixelformat;
600 f->fmt.pix.bytesperline =
601 (f->fmt.pix.width * fh->fmt->depth) >> 3;
602 f->fmt.pix.sizeimage = fh->sizeimage;
603 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
604 return 0;
605 }
606
vidioc_try_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)607 static int vidioc_try_fmt_cap(struct file *file, void *priv,
608 struct v4l2_format *f)
609 {
610 struct viu_fmt *fmt;
611 unsigned int maxw, maxh;
612
613 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
614 if (!fmt) {
615 dprintk(1, "Fourcc format (0x%08x) invalid.",
616 f->fmt.pix.pixelformat);
617 return -EINVAL;
618 }
619
620 maxw = norm_maxw();
621 maxh = norm_maxh();
622
623 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
624 if (f->fmt.pix.height < 32)
625 f->fmt.pix.height = 32;
626 if (f->fmt.pix.height > maxh)
627 f->fmt.pix.height = maxh;
628 if (f->fmt.pix.width < 48)
629 f->fmt.pix.width = 48;
630 if (f->fmt.pix.width > maxw)
631 f->fmt.pix.width = maxw;
632 f->fmt.pix.width &= ~0x03;
633 f->fmt.pix.bytesperline =
634 (f->fmt.pix.width * fmt->depth) >> 3;
635 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
636 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
637
638 return 0;
639 }
640
vidioc_s_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)641 static int vidioc_s_fmt_cap(struct file *file, void *priv,
642 struct v4l2_format *f)
643 {
644 struct viu_fh *fh = priv;
645 int ret;
646
647 ret = vidioc_try_fmt_cap(file, fh, f);
648 if (ret < 0)
649 return ret;
650
651 fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
652 fh->width = f->fmt.pix.width;
653 fh->height = f->fmt.pix.height;
654 fh->sizeimage = f->fmt.pix.sizeimage;
655 fh->vb_vidq.field = f->fmt.pix.field;
656 fh->type = f->type;
657 return 0;
658 }
659
vidioc_g_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)660 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
661 struct v4l2_format *f)
662 {
663 struct viu_fh *fh = priv;
664
665 f->fmt.win = fh->win;
666 return 0;
667 }
668
verify_preview(struct viu_dev * dev,struct v4l2_window * win)669 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
670 {
671 enum v4l2_field field;
672 int maxw, maxh;
673
674 if (dev->ovbuf.base == NULL)
675 return -EINVAL;
676 if (dev->ovfmt == NULL)
677 return -EINVAL;
678 if (win->w.width < 48 || win->w.height < 32)
679 return -EINVAL;
680
681 field = win->field;
682 maxw = dev->crop_current.width;
683 maxh = dev->crop_current.height;
684
685 if (field == V4L2_FIELD_ANY) {
686 field = (win->w.height > maxh/2)
687 ? V4L2_FIELD_INTERLACED
688 : V4L2_FIELD_TOP;
689 }
690 switch (field) {
691 case V4L2_FIELD_TOP:
692 case V4L2_FIELD_BOTTOM:
693 maxh = maxh / 2;
694 break;
695 case V4L2_FIELD_INTERLACED:
696 break;
697 default:
698 return -EINVAL;
699 }
700
701 win->field = field;
702 if (win->w.width > maxw)
703 win->w.width = maxw;
704 if (win->w.height > maxh)
705 win->w.height = maxh;
706 return 0;
707 }
708
viu_activate_overlay(struct viu_reg __iomem * vr)709 inline void viu_activate_overlay(struct viu_reg __iomem *vr)
710 {
711 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
712 out_be32(&vr->dma_inc, reg_val.dma_inc);
713 out_be32(&vr->picture_count, reg_val.picture_count);
714 }
715
viu_setup_preview(struct viu_dev * dev,struct viu_fh * fh)716 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
717 {
718 int bpp;
719
720 dprintk(1, "%s %dx%d\n", __func__,
721 fh->win.w.width, fh->win.w.height);
722
723 reg_val.status_cfg = 0;
724
725 /* setup window */
726 reg_val.picture_count = (fh->win.w.height / 2) << 16 |
727 fh->win.w.width;
728
729 /* setup color depth and dma increment */
730 bpp = dev->ovfmt->depth / 8;
731 switch (bpp) {
732 case 2:
733 reg_val.status_cfg &= ~MODE_32BIT;
734 reg_val.dma_inc = fh->win.w.width * 2;
735 break;
736 case 4:
737 reg_val.status_cfg |= MODE_32BIT;
738 reg_val.dma_inc = fh->win.w.width * 4;
739 break;
740 default:
741 dprintk(0, "device doesn't support color depth(%d)\n",
742 bpp * 8);
743 return -EINVAL;
744 }
745
746 dev->ovfield = fh->win.field;
747 if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
748 reg_val.dma_inc = 0;
749
750 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
751
752 /* setup the base address of the overlay buffer */
753 reg_val.field_base_addr = (u32)(long)dev->ovbuf.base;
754
755 return 0;
756 }
757
vidioc_s_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)758 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
759 struct v4l2_format *f)
760 {
761 struct viu_fh *fh = priv;
762 struct viu_dev *dev = (struct viu_dev *)fh->dev;
763 unsigned long flags;
764 int err;
765
766 err = verify_preview(dev, &f->fmt.win);
767 if (err)
768 return err;
769
770 fh->win = f->fmt.win;
771
772 spin_lock_irqsave(&dev->slock, flags);
773 viu_setup_preview(dev, fh);
774 spin_unlock_irqrestore(&dev->slock, flags);
775 return 0;
776 }
777
vidioc_try_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)778 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
779 struct v4l2_format *f)
780 {
781 return 0;
782 }
783
vidioc_overlay(struct file * file,void * priv,unsigned int on)784 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
785 {
786 struct viu_fh *fh = priv;
787 struct viu_dev *dev = (struct viu_dev *)fh->dev;
788 unsigned long flags;
789
790 if (on) {
791 spin_lock_irqsave(&dev->slock, flags);
792 viu_activate_overlay(dev->vr);
793 dev->ovenable = 1;
794
795 /* start dma */
796 viu_start_dma(dev);
797 spin_unlock_irqrestore(&dev->slock, flags);
798 } else {
799 viu_stop_dma(dev);
800 dev->ovenable = 0;
801 }
802
803 return 0;
804 }
805
vidioc_g_fbuf(struct file * file,void * priv,struct v4l2_framebuffer * arg)806 static int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
807 {
808 struct viu_fh *fh = priv;
809 struct viu_dev *dev = fh->dev;
810 struct v4l2_framebuffer *fb = arg;
811
812 *fb = dev->ovbuf;
813 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
814 return 0;
815 }
816
vidioc_s_fbuf(struct file * file,void * priv,const struct v4l2_framebuffer * arg)817 static int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
818 {
819 struct viu_fh *fh = priv;
820 struct viu_dev *dev = fh->dev;
821 const struct v4l2_framebuffer *fb = arg;
822 struct viu_fmt *fmt;
823
824 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
825 return -EPERM;
826
827 /* check args */
828 fmt = format_by_fourcc(fb->fmt.pixelformat);
829 if (fmt == NULL)
830 return -EINVAL;
831
832 /* ok, accept it */
833 dev->ovbuf = *fb;
834 dev->ovfmt = fmt;
835 if (dev->ovbuf.fmt.bytesperline == 0) {
836 dev->ovbuf.fmt.bytesperline =
837 dev->ovbuf.fmt.width * fmt->depth / 8;
838 }
839 return 0;
840 }
841
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * p)842 static int vidioc_reqbufs(struct file *file, void *priv,
843 struct v4l2_requestbuffers *p)
844 {
845 struct viu_fh *fh = priv;
846
847 return videobuf_reqbufs(&fh->vb_vidq, p);
848 }
849
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * p)850 static int vidioc_querybuf(struct file *file, void *priv,
851 struct v4l2_buffer *p)
852 {
853 struct viu_fh *fh = priv;
854
855 return videobuf_querybuf(&fh->vb_vidq, p);
856 }
857
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * p)858 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
859 {
860 struct viu_fh *fh = priv;
861
862 return videobuf_qbuf(&fh->vb_vidq, p);
863 }
864
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * p)865 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
866 {
867 struct viu_fh *fh = priv;
868
869 return videobuf_dqbuf(&fh->vb_vidq, p,
870 file->f_flags & O_NONBLOCK);
871 }
872
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type i)873 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
874 {
875 struct viu_fh *fh = priv;
876 struct viu_dev *dev = fh->dev;
877
878 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
879 return -EINVAL;
880 if (fh->type != i)
881 return -EINVAL;
882
883 if (dev->ovenable)
884 dev->ovenable = 0;
885
886 viu_start_dma(fh->dev);
887
888 return videobuf_streamon(&fh->vb_vidq);
889 }
890
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type i)891 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
892 {
893 struct viu_fh *fh = priv;
894
895 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
896 return -EINVAL;
897 if (fh->type != i)
898 return -EINVAL;
899
900 viu_stop_dma(fh->dev);
901
902 return videobuf_streamoff(&fh->vb_vidq);
903 }
904
905 #define decoder_call(viu, o, f, args...) \
906 v4l2_subdev_call(viu->decoder, o, f, ##args)
907
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * std_id)908 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
909 {
910 struct viu_fh *fh = priv;
911
912 decoder_call(fh->dev, video, querystd, std_id);
913 return 0;
914 }
915
vidioc_s_std(struct file * file,void * priv,v4l2_std_id id)916 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
917 {
918 struct viu_fh *fh = priv;
919
920 fh->dev->std = id;
921 decoder_call(fh->dev, video, s_std, id);
922 return 0;
923 }
924
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * std_id)925 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
926 {
927 struct viu_fh *fh = priv;
928
929 *std_id = fh->dev->std;
930 return 0;
931 }
932
933 /* only one input in this driver */
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * inp)934 static int vidioc_enum_input(struct file *file, void *priv,
935 struct v4l2_input *inp)
936 {
937 struct viu_fh *fh = priv;
938
939 if (inp->index != 0)
940 return -EINVAL;
941
942 inp->type = V4L2_INPUT_TYPE_CAMERA;
943 inp->std = fh->dev->vdev->tvnorms;
944 strcpy(inp->name, "Camera");
945 return 0;
946 }
947
vidioc_g_input(struct file * file,void * priv,unsigned int * i)948 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
949 {
950 *i = 0;
951 return 0;
952 }
953
vidioc_s_input(struct file * file,void * priv,unsigned int i)954 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
955 {
956 struct viu_fh *fh = priv;
957
958 if (i)
959 return -EINVAL;
960
961 decoder_call(fh->dev, video, s_routing, i, 0, 0);
962 return 0;
963 }
964
viu_activate_next_buf(struct viu_dev * dev,struct viu_dmaqueue * viuq)965 inline void viu_activate_next_buf(struct viu_dev *dev,
966 struct viu_dmaqueue *viuq)
967 {
968 struct viu_dmaqueue *vidq = viuq;
969 struct viu_buf *buf;
970
971 /* launch another DMA operation for an active/queued buffer */
972 if (!list_empty(&vidq->active)) {
973 buf = list_entry(vidq->active.next, struct viu_buf,
974 vb.queue);
975 dprintk(1, "start another queued buffer: 0x%p\n", buf);
976 buffer_activate(dev, buf);
977 } else if (!list_empty(&vidq->queued)) {
978 buf = list_entry(vidq->queued.next, struct viu_buf,
979 vb.queue);
980 list_del(&buf->vb.queue);
981
982 dprintk(1, "start another queued buffer: 0x%p\n", buf);
983 list_add_tail(&buf->vb.queue, &vidq->active);
984 buf->vb.state = VIDEOBUF_ACTIVE;
985 buffer_activate(dev, buf);
986 }
987 }
988
viu_default_settings(struct viu_reg __iomem * vr)989 inline void viu_default_settings(struct viu_reg __iomem *vr)
990 {
991 out_be32(&vr->luminance, 0x9512A254);
992 out_be32(&vr->chroma_r, 0x03310000);
993 out_be32(&vr->chroma_g, 0x06600F38);
994 out_be32(&vr->chroma_b, 0x00000409);
995 out_be32(&vr->alpha, 0x000000ff);
996 out_be32(&vr->req_alarm, 0x00000090);
997 dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
998 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
999 }
1000
viu_overlay_intr(struct viu_dev * dev,u32 status)1001 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1002 {
1003 struct viu_reg __iomem *vr = dev->vr;
1004
1005 if (status & INT_DMA_END_STATUS)
1006 dev->dma_done = 1;
1007
1008 if (status & INT_FIELD_STATUS) {
1009 if (dev->dma_done) {
1010 u32 addr = reg_val.field_base_addr;
1011
1012 dev->dma_done = 0;
1013 if (status & FIELD_NO)
1014 addr += reg_val.dma_inc;
1015
1016 out_be32(&vr->field_base_addr, addr);
1017 out_be32(&vr->dma_inc, reg_val.dma_inc);
1018 out_be32(&vr->status_cfg,
1019 (status & 0xffc0ffff) |
1020 (status & INT_ALL_STATUS) |
1021 reg_val.status_cfg);
1022 } else if (status & INT_VSYNC_STATUS) {
1023 out_be32(&vr->status_cfg,
1024 (status & 0xffc0ffff) |
1025 (status & INT_ALL_STATUS) |
1026 reg_val.status_cfg);
1027 }
1028 }
1029 }
1030
viu_capture_intr(struct viu_dev * dev,u32 status)1031 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1032 {
1033 struct viu_dmaqueue *vidq = &dev->vidq;
1034 struct viu_reg __iomem *vr = dev->vr;
1035 struct viu_buf *buf;
1036 int field_num;
1037 int need_two;
1038 int dma_done = 0;
1039
1040 field_num = status & FIELD_NO;
1041 need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1042
1043 if (status & INT_DMA_END_STATUS) {
1044 dma_done = 1;
1045 if (((field_num == 0) && (dev->field == 0)) ||
1046 (field_num && (dev->field == 1)))
1047 dev->field++;
1048 }
1049
1050 if (status & INT_FIELD_STATUS) {
1051 dprintk(1, "irq: field %d, done %d\n",
1052 !!field_num, dma_done);
1053 if (unlikely(dev->first)) {
1054 if (field_num == 0) {
1055 dev->first = 0;
1056 dprintk(1, "activate first buf\n");
1057 viu_activate_next_buf(dev, vidq);
1058 } else
1059 dprintk(1, "wait field 0\n");
1060 return;
1061 }
1062
1063 /* setup buffer address for next dma operation */
1064 if (!list_empty(&vidq->active)) {
1065 u32 addr = reg_val.field_base_addr;
1066
1067 if (field_num && need_two) {
1068 addr += reg_val.dma_inc;
1069 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1070 (unsigned long)addr, dev->field);
1071 }
1072 out_be32(&vr->field_base_addr, addr);
1073 out_be32(&vr->dma_inc, reg_val.dma_inc);
1074 out_be32(&vr->status_cfg,
1075 (status & 0xffc0ffff) |
1076 (status & INT_ALL_STATUS) |
1077 reg_val.status_cfg);
1078 return;
1079 }
1080 }
1081
1082 if (dma_done && field_num && (dev->field == 2)) {
1083 dev->field = 0;
1084 buf = list_entry(vidq->active.next,
1085 struct viu_buf, vb.queue);
1086 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1087 buf, buf->vb.i,
1088 (unsigned long)videobuf_to_dma_contig(&buf->vb),
1089 (unsigned long)in_be32(&vr->field_base_addr));
1090
1091 if (waitqueue_active(&buf->vb.done)) {
1092 list_del(&buf->vb.queue);
1093 v4l2_get_timestamp(&buf->vb.ts);
1094 buf->vb.state = VIDEOBUF_DONE;
1095 buf->vb.field_count++;
1096 wake_up(&buf->vb.done);
1097 }
1098 /* activate next dma buffer */
1099 viu_activate_next_buf(dev, vidq);
1100 }
1101 }
1102
viu_intr(int irq,void * dev_id)1103 static irqreturn_t viu_intr(int irq, void *dev_id)
1104 {
1105 struct viu_dev *dev = (struct viu_dev *)dev_id;
1106 struct viu_reg __iomem *vr = dev->vr;
1107 u32 status;
1108 u32 error;
1109
1110 status = in_be32(&vr->status_cfg);
1111
1112 if (status & INT_ERROR_STATUS) {
1113 dev->irqs.error_irq++;
1114 error = status & ERR_MASK;
1115 if (error)
1116 dprintk(1, "Err: error(%d), times:%d!\n",
1117 error >> 4, dev->irqs.error_irq);
1118 /* Clear interrupt error bit and error flags */
1119 out_be32(&vr->status_cfg,
1120 (status & 0xffc0ffff) | INT_ERROR_STATUS);
1121 }
1122
1123 if (status & INT_DMA_END_STATUS) {
1124 dev->irqs.dma_end_irq++;
1125 dev->dma_done = 1;
1126 dprintk(2, "VIU DMA end interrupt times: %d\n",
1127 dev->irqs.dma_end_irq);
1128 }
1129
1130 if (status & INT_HSYNC_STATUS)
1131 dev->irqs.hsync_irq++;
1132
1133 if (status & INT_FIELD_STATUS) {
1134 dev->irqs.field_irq++;
1135 dprintk(2, "VIU field interrupt times: %d\n",
1136 dev->irqs.field_irq);
1137 }
1138
1139 if (status & INT_VSTART_STATUS)
1140 dev->irqs.vstart_irq++;
1141
1142 if (status & INT_VSYNC_STATUS) {
1143 dev->irqs.vsync_irq++;
1144 dprintk(2, "VIU vsync interrupt times: %d\n",
1145 dev->irqs.vsync_irq);
1146 }
1147
1148 /* clear all pending irqs */
1149 status = in_be32(&vr->status_cfg);
1150 out_be32(&vr->status_cfg,
1151 (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1152
1153 if (dev->ovenable) {
1154 viu_overlay_intr(dev, status);
1155 return IRQ_HANDLED;
1156 }
1157
1158 /* Capture mode */
1159 viu_capture_intr(dev, status);
1160 return IRQ_HANDLED;
1161 }
1162
1163 /*
1164 * File operations for the device
1165 */
viu_open(struct file * file)1166 static int viu_open(struct file *file)
1167 {
1168 struct video_device *vdev = video_devdata(file);
1169 struct viu_dev *dev = video_get_drvdata(vdev);
1170 struct viu_fh *fh;
1171 struct viu_reg __iomem *vr;
1172 int minor = vdev->minor;
1173 u32 status_cfg;
1174
1175 dprintk(1, "viu: open (minor=%d)\n", minor);
1176
1177 dev->users++;
1178 if (dev->users > 1) {
1179 dev->users--;
1180 return -EBUSY;
1181 }
1182
1183 vr = dev->vr;
1184
1185 dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1186 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1187
1188 if (mutex_lock_interruptible(&dev->lock)) {
1189 dev->users--;
1190 return -ERESTARTSYS;
1191 }
1192
1193 /* allocate and initialize per filehandle data */
1194 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1195 if (!fh) {
1196 dev->users--;
1197 mutex_unlock(&dev->lock);
1198 return -ENOMEM;
1199 }
1200
1201 v4l2_fh_init(&fh->fh, vdev);
1202 file->private_data = fh;
1203 fh->dev = dev;
1204
1205 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1206 fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1207 fh->width = norm_maxw();
1208 fh->height = norm_maxh();
1209 dev->crop_current.width = fh->width;
1210 dev->crop_current.height = fh->height;
1211
1212 dprintk(1, "Open: fh=%p, dev=%p, dev->vidq=%p\n", fh, dev, &dev->vidq);
1213 dprintk(1, "Open: list_empty queued=%d\n",
1214 list_empty(&dev->vidq.queued));
1215 dprintk(1, "Open: list_empty active=%d\n",
1216 list_empty(&dev->vidq.active));
1217
1218 viu_default_settings(vr);
1219
1220 status_cfg = in_be32(&vr->status_cfg);
1221 out_be32(&vr->status_cfg,
1222 status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1223 INT_FIELD_EN | INT_VSTART_EN |
1224 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1225
1226 status_cfg = in_be32(&vr->status_cfg);
1227 out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1228
1229 spin_lock_init(&fh->vbq_lock);
1230 videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1231 dev->dev, &fh->vbq_lock,
1232 fh->type, V4L2_FIELD_INTERLACED,
1233 sizeof(struct viu_buf), fh,
1234 &fh->dev->lock);
1235 v4l2_fh_add(&fh->fh);
1236 mutex_unlock(&dev->lock);
1237 return 0;
1238 }
1239
viu_read(struct file * file,char __user * data,size_t count,loff_t * ppos)1240 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1241 loff_t *ppos)
1242 {
1243 struct viu_fh *fh = file->private_data;
1244 struct viu_dev *dev = fh->dev;
1245 int ret = 0;
1246
1247 dprintk(2, "%s\n", __func__);
1248 if (dev->ovenable)
1249 dev->ovenable = 0;
1250
1251 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1252 if (mutex_lock_interruptible(&dev->lock))
1253 return -ERESTARTSYS;
1254 viu_start_dma(dev);
1255 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1256 ppos, 0, file->f_flags & O_NONBLOCK);
1257 mutex_unlock(&dev->lock);
1258 return ret;
1259 }
1260 return 0;
1261 }
1262
viu_poll(struct file * file,struct poll_table_struct * wait)1263 static __poll_t viu_poll(struct file *file, struct poll_table_struct *wait)
1264 {
1265 struct viu_fh *fh = file->private_data;
1266 struct videobuf_queue *q = &fh->vb_vidq;
1267 struct viu_dev *dev = fh->dev;
1268 __poll_t req_events = poll_requested_events(wait);
1269 __poll_t res = v4l2_ctrl_poll(file, wait);
1270
1271 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1272 return EPOLLERR;
1273
1274 if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
1275 return res;
1276
1277 mutex_lock(&dev->lock);
1278 res |= videobuf_poll_stream(file, q, wait);
1279 mutex_unlock(&dev->lock);
1280 return res;
1281 }
1282
viu_release(struct file * file)1283 static int viu_release(struct file *file)
1284 {
1285 struct viu_fh *fh = file->private_data;
1286 struct viu_dev *dev = fh->dev;
1287 int minor = video_devdata(file)->minor;
1288
1289 mutex_lock(&dev->lock);
1290 viu_stop_dma(dev);
1291 videobuf_stop(&fh->vb_vidq);
1292 videobuf_mmap_free(&fh->vb_vidq);
1293 v4l2_fh_del(&fh->fh);
1294 v4l2_fh_exit(&fh->fh);
1295 mutex_unlock(&dev->lock);
1296
1297 kfree(fh);
1298
1299 dev->users--;
1300 dprintk(1, "close (minor=%d, users=%d)\n",
1301 minor, dev->users);
1302 return 0;
1303 }
1304
viu_reset(struct viu_reg __iomem * reg)1305 static void viu_reset(struct viu_reg __iomem *reg)
1306 {
1307 out_be32(®->status_cfg, 0);
1308 out_be32(®->luminance, 0x9512a254);
1309 out_be32(®->chroma_r, 0x03310000);
1310 out_be32(®->chroma_g, 0x06600f38);
1311 out_be32(®->chroma_b, 0x00000409);
1312 out_be32(®->field_base_addr, 0);
1313 out_be32(®->dma_inc, 0);
1314 out_be32(®->picture_count, 0x01e002d0);
1315 out_be32(®->req_alarm, 0x00000090);
1316 out_be32(®->alpha, 0x000000ff);
1317 }
1318
viu_mmap(struct file * file,struct vm_area_struct * vma)1319 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1320 {
1321 struct viu_fh *fh = file->private_data;
1322 struct viu_dev *dev = fh->dev;
1323 int ret;
1324
1325 dprintk(1, "mmap called, vma=%p\n", vma);
1326
1327 if (mutex_lock_interruptible(&dev->lock))
1328 return -ERESTARTSYS;
1329 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1330 mutex_unlock(&dev->lock);
1331
1332 dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1333 (unsigned long)vma->vm_start,
1334 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1335 ret);
1336
1337 return ret;
1338 }
1339
1340 static const struct v4l2_file_operations viu_fops = {
1341 .owner = THIS_MODULE,
1342 .open = viu_open,
1343 .release = viu_release,
1344 .read = viu_read,
1345 .poll = viu_poll,
1346 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1347 .mmap = viu_mmap,
1348 };
1349
1350 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1351 .vidioc_querycap = vidioc_querycap,
1352 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
1353 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap,
1354 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
1355 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
1356 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1357 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1358 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1359 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1360 .vidioc_overlay = vidioc_overlay,
1361 .vidioc_g_fbuf = vidioc_g_fbuf,
1362 .vidioc_s_fbuf = vidioc_s_fbuf,
1363 .vidioc_reqbufs = vidioc_reqbufs,
1364 .vidioc_querybuf = vidioc_querybuf,
1365 .vidioc_qbuf = vidioc_qbuf,
1366 .vidioc_dqbuf = vidioc_dqbuf,
1367 .vidioc_g_std = vidioc_g_std,
1368 .vidioc_s_std = vidioc_s_std,
1369 .vidioc_querystd = vidioc_querystd,
1370 .vidioc_enum_input = vidioc_enum_input,
1371 .vidioc_g_input = vidioc_g_input,
1372 .vidioc_s_input = vidioc_s_input,
1373 .vidioc_streamon = vidioc_streamon,
1374 .vidioc_streamoff = vidioc_streamoff,
1375 .vidioc_log_status = v4l2_ctrl_log_status,
1376 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1377 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1378 };
1379
1380 static const struct video_device viu_template = {
1381 .name = "FSL viu",
1382 .fops = &viu_fops,
1383 .minor = -1,
1384 .ioctl_ops = &viu_ioctl_ops,
1385 .release = video_device_release,
1386
1387 .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1388 };
1389
viu_of_probe(struct platform_device * op)1390 static int viu_of_probe(struct platform_device *op)
1391 {
1392 struct viu_dev *viu_dev;
1393 struct video_device *vdev;
1394 struct resource r;
1395 struct viu_reg __iomem *viu_regs;
1396 struct i2c_adapter *ad;
1397 int ret, viu_irq;
1398 struct clk *clk;
1399
1400 ret = of_address_to_resource(op->dev.of_node, 0, &r);
1401 if (ret) {
1402 dev_err(&op->dev, "Can't parse device node resource\n");
1403 return -ENODEV;
1404 }
1405
1406 viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1407 if (!viu_irq) {
1408 dev_err(&op->dev, "Error while mapping the irq\n");
1409 return -EINVAL;
1410 }
1411
1412 /* request mem region */
1413 if (!devm_request_mem_region(&op->dev, r.start,
1414 sizeof(struct viu_reg), DRV_NAME)) {
1415 dev_err(&op->dev, "Error while requesting mem region\n");
1416 ret = -EBUSY;
1417 goto err_irq;
1418 }
1419
1420 /* remap registers */
1421 viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1422 if (!viu_regs) {
1423 dev_err(&op->dev, "Can't map register set\n");
1424 ret = -ENOMEM;
1425 goto err_irq;
1426 }
1427
1428 /* Prepare our private structure */
1429 viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1430 if (!viu_dev) {
1431 dev_err(&op->dev, "Can't allocate private structure\n");
1432 ret = -ENOMEM;
1433 goto err_irq;
1434 }
1435
1436 viu_dev->vr = viu_regs;
1437 viu_dev->irq = viu_irq;
1438 viu_dev->dev = &op->dev;
1439
1440 /* init video dma queues */
1441 INIT_LIST_HEAD(&viu_dev->vidq.active);
1442 INIT_LIST_HEAD(&viu_dev->vidq.queued);
1443
1444 snprintf(viu_dev->v4l2_dev.name,
1445 sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1446 ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1447 if (ret < 0) {
1448 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1449 goto err_irq;
1450 }
1451
1452 ad = i2c_get_adapter(0);
1453 if (!ad) {
1454 ret = -EFAULT;
1455 dev_err(&op->dev, "couldn't get i2c adapter\n");
1456 goto err_v4l2;
1457 }
1458
1459 v4l2_ctrl_handler_init(&viu_dev->hdl, 5);
1460 if (viu_dev->hdl.error) {
1461 ret = viu_dev->hdl.error;
1462 dev_err(&op->dev, "couldn't register control\n");
1463 goto err_i2c;
1464 }
1465 /* This control handler will inherit the control(s) from the
1466 sub-device(s). */
1467 viu_dev->v4l2_dev.ctrl_handler = &viu_dev->hdl;
1468 viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1469 "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1470
1471 timer_setup(&viu_dev->vidq.timeout, viu_vid_timeout, 0);
1472 viu_dev->std = V4L2_STD_NTSC_M;
1473 viu_dev->first = 1;
1474
1475 /* Allocate memory for video device */
1476 vdev = video_device_alloc();
1477 if (vdev == NULL) {
1478 ret = -ENOMEM;
1479 goto err_hdl;
1480 }
1481
1482 *vdev = viu_template;
1483
1484 vdev->v4l2_dev = &viu_dev->v4l2_dev;
1485
1486 viu_dev->vdev = vdev;
1487
1488 /* initialize locks */
1489 mutex_init(&viu_dev->lock);
1490 viu_dev->vdev->lock = &viu_dev->lock;
1491 spin_lock_init(&viu_dev->slock);
1492
1493 video_set_drvdata(viu_dev->vdev, viu_dev);
1494
1495 mutex_lock(&viu_dev->lock);
1496
1497 ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1498 if (ret < 0) {
1499 video_device_release(viu_dev->vdev);
1500 goto err_unlock;
1501 }
1502
1503 /* enable VIU clock */
1504 clk = devm_clk_get(&op->dev, "ipg");
1505 if (IS_ERR(clk)) {
1506 dev_err(&op->dev, "failed to lookup the clock!\n");
1507 ret = PTR_ERR(clk);
1508 goto err_vdev;
1509 }
1510 ret = clk_prepare_enable(clk);
1511 if (ret) {
1512 dev_err(&op->dev, "failed to enable the clock!\n");
1513 goto err_vdev;
1514 }
1515 viu_dev->clk = clk;
1516
1517 /* reset VIU module */
1518 viu_reset(viu_dev->vr);
1519
1520 /* install interrupt handler */
1521 if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1522 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1523 ret = -ENODEV;
1524 goto err_clk;
1525 }
1526
1527 mutex_unlock(&viu_dev->lock);
1528
1529 dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1530 return ret;
1531
1532 err_clk:
1533 clk_disable_unprepare(viu_dev->clk);
1534 err_vdev:
1535 video_unregister_device(viu_dev->vdev);
1536 err_unlock:
1537 mutex_unlock(&viu_dev->lock);
1538 err_hdl:
1539 v4l2_ctrl_handler_free(&viu_dev->hdl);
1540 err_i2c:
1541 i2c_put_adapter(ad);
1542 err_v4l2:
1543 v4l2_device_unregister(&viu_dev->v4l2_dev);
1544 err_irq:
1545 irq_dispose_mapping(viu_irq);
1546 return ret;
1547 }
1548
viu_of_remove(struct platform_device * op)1549 static int viu_of_remove(struct platform_device *op)
1550 {
1551 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1552 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1553 struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1554 struct v4l2_subdev, list);
1555 struct i2c_client *client = v4l2_get_subdevdata(sdev);
1556
1557 free_irq(dev->irq, (void *)dev);
1558 irq_dispose_mapping(dev->irq);
1559
1560 clk_disable_unprepare(dev->clk);
1561
1562 v4l2_ctrl_handler_free(&dev->hdl);
1563 video_unregister_device(dev->vdev);
1564 i2c_put_adapter(client->adapter);
1565 v4l2_device_unregister(&dev->v4l2_dev);
1566 return 0;
1567 }
1568
1569 #ifdef CONFIG_PM
viu_suspend(struct platform_device * op,pm_message_t state)1570 static int viu_suspend(struct platform_device *op, pm_message_t state)
1571 {
1572 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1573 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1574
1575 clk_disable(dev->clk);
1576 return 0;
1577 }
1578
viu_resume(struct platform_device * op)1579 static int viu_resume(struct platform_device *op)
1580 {
1581 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1582 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1583
1584 clk_enable(dev->clk);
1585 return 0;
1586 }
1587 #endif
1588
1589 /*
1590 * Initialization and module stuff
1591 */
1592 static const struct of_device_id mpc512x_viu_of_match[] = {
1593 {
1594 .compatible = "fsl,mpc5121-viu",
1595 },
1596 {},
1597 };
1598 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1599
1600 static struct platform_driver viu_of_platform_driver = {
1601 .probe = viu_of_probe,
1602 .remove = viu_of_remove,
1603 #ifdef CONFIG_PM
1604 .suspend = viu_suspend,
1605 .resume = viu_resume,
1606 #endif
1607 .driver = {
1608 .name = DRV_NAME,
1609 .of_match_table = mpc512x_viu_of_match,
1610 },
1611 };
1612
1613 module_platform_driver(viu_of_platform_driver);
1614
1615 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1616 MODULE_AUTHOR("Hongjun Chen");
1617 MODULE_LICENSE("GPL");
1618 MODULE_VERSION(VIU_VERSION);
1619
