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 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
40
41 #define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */
42
43 /* I2C address of video decoder chip is 0x4A */
44 #define VIU_VIDEO_DECODER_ADDR 0x25
45
46 static int info_level;
47
48 #define dprintk(level, fmt, arg...) \
49 do { \
50 if (level <= info_level) \
51 printk(KERN_DEBUG "viu: " fmt , ## arg); \
52 } while (0)
53
54 /*
55 * Basic structures
56 */
57 struct viu_fmt {
58 u32 fourcc; /* v4l2 format id */
59 u32 pixelformat;
60 int depth;
61 };
62
63 static struct viu_fmt formats[] = {
64 {
65 .fourcc = V4L2_PIX_FMT_RGB565,
66 .pixelformat = V4L2_PIX_FMT_RGB565,
67 .depth = 16,
68 }, {
69 .fourcc = V4L2_PIX_FMT_RGB32,
70 .pixelformat = V4L2_PIX_FMT_RGB32,
71 .depth = 32,
72 }
73 };
74
75 struct viu_dev;
76 struct viu_buf;
77
78 /* buffer for one video frame */
79 struct viu_buf {
80 /* common v4l buffer stuff -- must be first */
81 struct videobuf_buffer vb;
82 struct viu_fmt *fmt;
83 };
84
85 struct viu_dmaqueue {
86 struct viu_dev *dev;
87 struct list_head active;
88 struct list_head queued;
89 struct timer_list timeout;
90 };
91
92 struct viu_status {
93 u32 field_irq;
94 u32 vsync_irq;
95 u32 hsync_irq;
96 u32 vstart_irq;
97 u32 dma_end_irq;
98 u32 error_irq;
99 };
100
101 struct viu_reg {
102 u32 status_cfg;
103 u32 luminance;
104 u32 chroma_r;
105 u32 chroma_g;
106 u32 chroma_b;
107 u32 field_base_addr;
108 u32 dma_inc;
109 u32 picture_count;
110 u32 req_alarm;
111 u32 alpha;
112 } __attribute__ ((packed));
113
114 struct viu_dev {
115 struct v4l2_device v4l2_dev;
116 struct v4l2_ctrl_handler hdl;
117 struct mutex lock;
118 spinlock_t slock;
119 int users;
120
121 struct device *dev;
122 /* various device info */
123 struct video_device *vdev;
124 struct viu_dmaqueue vidq;
125 enum v4l2_field capfield;
126 int field;
127 int first;
128 int dma_done;
129
130 /* Hardware register area */
131 struct viu_reg *vr;
132
133 /* Interrupt vector */
134 int irq;
135 struct viu_status irqs;
136
137 /* video overlay */
138 struct v4l2_framebuffer ovbuf;
139 struct viu_fmt *ovfmt;
140 unsigned int ovenable;
141 enum v4l2_field ovfield;
142
143 /* crop */
144 struct v4l2_rect crop_current;
145
146 /* clock pointer */
147 struct clk *clk;
148
149 /* decoder */
150 struct v4l2_subdev *decoder;
151
152 v4l2_std_id std;
153 };
154
155 struct viu_fh {
156 /* must remain the first field of this struct */
157 struct v4l2_fh fh;
158 struct viu_dev *dev;
159
160 /* video capture */
161 struct videobuf_queue vb_vidq;
162 spinlock_t vbq_lock; /* spinlock for the videobuf queue */
163
164 /* video overlay */
165 struct v4l2_window win;
166 struct v4l2_clip clips[1];
167
168 /* video capture */
169 struct viu_fmt *fmt;
170 int width, height, sizeimage;
171 enum v4l2_buf_type type;
172 };
173
174 static struct viu_reg reg_val;
175
176 /*
177 * Macro definitions of VIU registers
178 */
179
180 /* STATUS_CONFIG register */
181 enum status_config {
182 SOFT_RST = 1 << 0,
183
184 ERR_MASK = 0x0f << 4, /* Error code mask */
185 ERR_NO = 0x00, /* No error */
186 ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */
187 ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */
188 ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */
189 ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */
190 ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */
191 ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */
192 ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */
193 ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */
194 ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */
195 ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */
196
197 INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */
198 INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */
199 INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */
200 INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */
201 INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */
202 INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */
203 INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */
204
205 INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */
206 INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */
207 INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */
208 INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */
209 INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */
210 INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */
211
212 DMA_ACT = 0x01 << 27, /* Enable DMA transfer */
213 FIELD_NO = 0x01 << 28, /* Field number */
214 DITHER_ON = 0x01 << 29, /* Dithering is on */
215 ROUND_ON = 0x01 << 30, /* Round is on */
216 MODE_32BIT = 0x01 << 31, /* Data in RGBa888,
217 * 0 in RGB565
218 */
219 };
220
221 #define norm_maxw() 720
222 #define norm_maxh() 576
223
224 #define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
225 INT_HSYNC_STATUS | INT_VSTART_STATUS | \
226 INT_DMA_END_STATUS | INT_ERROR_STATUS)
227
228 #define NUM_FORMATS ARRAY_SIZE(formats)
229
230 static irqreturn_t viu_intr(int irq, void *dev_id);
231
format_by_fourcc(int fourcc)232 struct viu_fmt *format_by_fourcc(int fourcc)
233 {
234 int i;
235
236 for (i = 0; i < NUM_FORMATS; i++) {
237 if (formats[i].pixelformat == fourcc)
238 return formats + i;
239 }
240
241 dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
242 return NULL;
243 }
244
viu_start_dma(struct viu_dev * dev)245 void viu_start_dma(struct viu_dev *dev)
246 {
247 struct viu_reg *vr = dev->vr;
248
249 dev->field = 0;
250
251 /* Enable DMA operation */
252 out_be32(&vr->status_cfg, SOFT_RST);
253 out_be32(&vr->status_cfg, INT_FIELD_EN);
254 }
255
viu_stop_dma(struct viu_dev * dev)256 void viu_stop_dma(struct viu_dev *dev)
257 {
258 struct viu_reg *vr = dev->vr;
259 int cnt = 100;
260 u32 status_cfg;
261
262 out_be32(&vr->status_cfg, 0);
263
264 /* Clear pending interrupts */
265 status_cfg = in_be32(&vr->status_cfg);
266 if (status_cfg & 0x3f0000)
267 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
268
269 if (status_cfg & DMA_ACT) {
270 do {
271 status_cfg = in_be32(&vr->status_cfg);
272 if (status_cfg & INT_DMA_END_STATUS)
273 break;
274 } while (cnt--);
275
276 if (cnt < 0) {
277 /* timed out, issue soft reset */
278 out_be32(&vr->status_cfg, SOFT_RST);
279 out_be32(&vr->status_cfg, 0);
280 } else {
281 /* clear DMA_END and other pending irqs */
282 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
283 }
284 }
285
286 dev->field = 0;
287 }
288
restart_video_queue(struct viu_dmaqueue * vidq)289 static int restart_video_queue(struct viu_dmaqueue *vidq)
290 {
291 struct viu_buf *buf, *prev;
292
293 dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
294 if (!list_empty(&vidq->active)) {
295 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
296 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
297 buf, buf->vb.i);
298
299 viu_stop_dma(vidq->dev);
300
301 /* cancel all outstanding capture requests */
302 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
303 list_del(&buf->vb.queue);
304 buf->vb.state = VIDEOBUF_ERROR;
305 wake_up(&buf->vb.done);
306 }
307 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
308 return 0;
309 }
310
311 prev = NULL;
312 for (;;) {
313 if (list_empty(&vidq->queued))
314 return 0;
315 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
316 if (prev == NULL) {
317 list_move_tail(&buf->vb.queue, &vidq->active);
318
319 dprintk(1, "Restarting video dma\n");
320 viu_stop_dma(vidq->dev);
321 viu_start_dma(vidq->dev);
322
323 buf->vb.state = VIDEOBUF_ACTIVE;
324 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
325 dprintk(2, "[%p/%d] restart_queue - first active\n",
326 buf, buf->vb.i);
327
328 } else if (prev->vb.width == buf->vb.width &&
329 prev->vb.height == buf->vb.height &&
330 prev->fmt == buf->fmt) {
331 list_move_tail(&buf->vb.queue, &vidq->active);
332 buf->vb.state = VIDEOBUF_ACTIVE;
333 dprintk(2, "[%p/%d] restart_queue - move to active\n",
334 buf, buf->vb.i);
335 } else {
336 return 0;
337 }
338 prev = buf;
339 }
340 }
341
viu_vid_timeout(unsigned long data)342 static void viu_vid_timeout(unsigned long data)
343 {
344 struct viu_dev *dev = (struct viu_dev *)data;
345 struct viu_buf *buf;
346 struct viu_dmaqueue *vidq = &dev->vidq;
347
348 while (!list_empty(&vidq->active)) {
349 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
350 list_del(&buf->vb.queue);
351 buf->vb.state = VIDEOBUF_ERROR;
352 wake_up(&buf->vb.done);
353 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
354 }
355
356 restart_video_queue(vidq);
357 }
358
359 /*
360 * Videobuf operations
361 */
buffer_setup(struct videobuf_queue * vq,unsigned int * count,unsigned int * size)362 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
363 unsigned int *size)
364 {
365 struct viu_fh *fh = vq->priv_data;
366
367 *size = fh->width * fh->height * fh->fmt->depth >> 3;
368 if (*count == 0)
369 *count = 32;
370
371 while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
372 (*count)--;
373
374 dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
375 return 0;
376 }
377
free_buffer(struct videobuf_queue * vq,struct viu_buf * buf)378 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
379 {
380 struct videobuf_buffer *vb = &buf->vb;
381 void *vaddr = NULL;
382
383 BUG_ON(in_interrupt());
384
385 videobuf_waiton(vq, &buf->vb, 0, 0);
386
387 if (vq->int_ops && vq->int_ops->vaddr)
388 vaddr = vq->int_ops->vaddr(vb);
389
390 if (vaddr)
391 videobuf_dma_contig_free(vq, &buf->vb);
392
393 buf->vb.state = VIDEOBUF_NEEDS_INIT;
394 }
395
buffer_activate(struct viu_dev * dev,struct viu_buf * buf)396 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
397 {
398 struct viu_reg *vr = dev->vr;
399 int bpp;
400
401 /* setup the DMA base address */
402 reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
403
404 dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
405 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
406
407 /* interlace is on by default, set horizontal DMA increment */
408 reg_val.status_cfg = 0;
409 bpp = buf->fmt->depth >> 3;
410 switch (bpp) {
411 case 2:
412 reg_val.status_cfg &= ~MODE_32BIT;
413 reg_val.dma_inc = buf->vb.width * 2;
414 break;
415 case 4:
416 reg_val.status_cfg |= MODE_32BIT;
417 reg_val.dma_inc = buf->vb.width * 4;
418 break;
419 default:
420 dprintk(0, "doesn't support color depth(%d)\n",
421 bpp * 8);
422 return -EINVAL;
423 }
424
425 /* setup picture_count register */
426 reg_val.picture_count = (buf->vb.height / 2) << 16 |
427 buf->vb.width;
428
429 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
430
431 buf->vb.state = VIDEOBUF_ACTIVE;
432 dev->capfield = buf->vb.field;
433
434 /* reset dma increment if needed */
435 if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
436 reg_val.dma_inc = 0;
437
438 out_be32(&vr->dma_inc, reg_val.dma_inc);
439 out_be32(&vr->picture_count, reg_val.picture_count);
440 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
441 mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
442 return 0;
443 }
444
buffer_prepare(struct videobuf_queue * vq,struct videobuf_buffer * vb,enum v4l2_field field)445 static int buffer_prepare(struct videobuf_queue *vq,
446 struct videobuf_buffer *vb,
447 enum v4l2_field field)
448 {
449 struct viu_fh *fh = vq->priv_data;
450 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
451 int rc;
452
453 BUG_ON(fh->fmt == NULL);
454
455 if (fh->width < 48 || fh->width > norm_maxw() ||
456 fh->height < 32 || fh->height > norm_maxh())
457 return -EINVAL;
458 buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
459 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
460 return -EINVAL;
461
462 if (buf->fmt != fh->fmt ||
463 buf->vb.width != fh->width ||
464 buf->vb.height != fh->height ||
465 buf->vb.field != field) {
466 buf->fmt = fh->fmt;
467 buf->vb.width = fh->width;
468 buf->vb.height = fh->height;
469 buf->vb.field = field;
470 }
471
472 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
473 rc = videobuf_iolock(vq, &buf->vb, NULL);
474 if (rc != 0)
475 goto fail;
476
477 buf->vb.width = fh->width;
478 buf->vb.height = fh->height;
479 buf->vb.field = field;
480 buf->fmt = fh->fmt;
481 }
482
483 buf->vb.state = VIDEOBUF_PREPARED;
484 return 0;
485
486 fail:
487 free_buffer(vq, buf);
488 return rc;
489 }
490
buffer_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)491 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
492 {
493 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
494 struct viu_fh *fh = vq->priv_data;
495 struct viu_dev *dev = fh->dev;
496 struct viu_dmaqueue *vidq = &dev->vidq;
497 struct viu_buf *prev;
498
499 if (!list_empty(&vidq->queued)) {
500 dprintk(1, "adding vb queue=0x%08lx\n",
501 (unsigned long)&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=0x%08lx\n",
513 (unsigned long)&buf->vb.queue);
514 list_add_tail(&buf->vb.queue, &vidq->active);
515 buf->vb.state = VIDEOBUF_ACTIVE;
516 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
517 dprintk(2, "[%p/%d] buffer_queue - first active\n",
518 buf, buf->vb.i);
519
520 buffer_activate(dev, buf);
521 } else {
522 dprintk(1, "adding vb queue2=0x%08lx\n",
523 (unsigned long)&buf->vb.queue);
524 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
525 if (prev->vb.width == buf->vb.width &&
526 prev->vb.height == buf->vb.height &&
527 prev->fmt == buf->fmt) {
528 list_add_tail(&buf->vb.queue, &vidq->active);
529 buf->vb.state = VIDEOBUF_ACTIVE;
530 dprintk(2, "[%p/%d] buffer_queue - append to active\n",
531 buf, buf->vb.i);
532 } else {
533 list_add_tail(&buf->vb.queue, &vidq->queued);
534 buf->vb.state = VIDEOBUF_QUEUED;
535 dprintk(2, "[%p/%d] buffer_queue - first queued\n",
536 buf, buf->vb.i);
537 }
538 }
539 }
540
buffer_release(struct videobuf_queue * vq,struct videobuf_buffer * vb)541 static void buffer_release(struct videobuf_queue *vq,
542 struct videobuf_buffer *vb)
543 {
544 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
545 struct viu_fh *fh = vq->priv_data;
546 struct viu_dev *dev = (struct viu_dev *)fh->dev;
547
548 viu_stop_dma(dev);
549 free_buffer(vq, buf);
550 }
551
552 static const struct videobuf_queue_ops viu_video_qops = {
553 .buf_setup = buffer_setup,
554 .buf_prepare = buffer_prepare,
555 .buf_queue = buffer_queue,
556 .buf_release = buffer_release,
557 };
558
559 /*
560 * IOCTL vidioc handling
561 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)562 static int vidioc_querycap(struct file *file, void *priv,
563 struct v4l2_capability *cap)
564 {
565 strcpy(cap->driver, "viu");
566 strcpy(cap->card, "viu");
567 strcpy(cap->bus_info, "platform:viu");
568 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
569 V4L2_CAP_STREAMING |
570 V4L2_CAP_VIDEO_OVERLAY |
571 V4L2_CAP_READWRITE;
572 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
573 return 0;
574 }
575
vidioc_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)576 static int vidioc_enum_fmt(struct file *file, void *priv,
577 struct v4l2_fmtdesc *f)
578 {
579 int index = f->index;
580
581 if (f->index >= NUM_FORMATS)
582 return -EINVAL;
583
584 f->pixelformat = formats[index].fourcc;
585 return 0;
586 }
587
vidioc_g_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)588 static int vidioc_g_fmt_cap(struct file *file, void *priv,
589 struct v4l2_format *f)
590 {
591 struct viu_fh *fh = priv;
592
593 f->fmt.pix.width = fh->width;
594 f->fmt.pix.height = fh->height;
595 f->fmt.pix.field = fh->vb_vidq.field;
596 f->fmt.pix.pixelformat = fh->fmt->pixelformat;
597 f->fmt.pix.bytesperline =
598 (f->fmt.pix.width * fh->fmt->depth) >> 3;
599 f->fmt.pix.sizeimage = fh->sizeimage;
600 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
601 return 0;
602 }
603
vidioc_try_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)604 static int vidioc_try_fmt_cap(struct file *file, void *priv,
605 struct v4l2_format *f)
606 {
607 struct viu_fmt *fmt;
608 unsigned int maxw, maxh;
609
610 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
611 if (!fmt) {
612 dprintk(1, "Fourcc format (0x%08x) invalid.",
613 f->fmt.pix.pixelformat);
614 return -EINVAL;
615 }
616
617 maxw = norm_maxw();
618 maxh = norm_maxh();
619
620 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
621 if (f->fmt.pix.height < 32)
622 f->fmt.pix.height = 32;
623 if (f->fmt.pix.height > maxh)
624 f->fmt.pix.height = maxh;
625 if (f->fmt.pix.width < 48)
626 f->fmt.pix.width = 48;
627 if (f->fmt.pix.width > maxw)
628 f->fmt.pix.width = maxw;
629 f->fmt.pix.width &= ~0x03;
630 f->fmt.pix.bytesperline =
631 (f->fmt.pix.width * fmt->depth) >> 3;
632 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
633 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
634
635 return 0;
636 }
637
vidioc_s_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)638 static int vidioc_s_fmt_cap(struct file *file, void *priv,
639 struct v4l2_format *f)
640 {
641 struct viu_fh *fh = priv;
642 int ret;
643
644 ret = vidioc_try_fmt_cap(file, fh, f);
645 if (ret < 0)
646 return ret;
647
648 fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
649 fh->width = f->fmt.pix.width;
650 fh->height = f->fmt.pix.height;
651 fh->sizeimage = f->fmt.pix.sizeimage;
652 fh->vb_vidq.field = f->fmt.pix.field;
653 fh->type = f->type;
654 return 0;
655 }
656
vidioc_g_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)657 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
658 struct v4l2_format *f)
659 {
660 struct viu_fh *fh = priv;
661
662 f->fmt.win = fh->win;
663 return 0;
664 }
665
verify_preview(struct viu_dev * dev,struct v4l2_window * win)666 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
667 {
668 enum v4l2_field field;
669 int maxw, maxh;
670
671 if (dev->ovbuf.base == NULL)
672 return -EINVAL;
673 if (dev->ovfmt == NULL)
674 return -EINVAL;
675 if (win->w.width < 48 || win->w.height < 32)
676 return -EINVAL;
677
678 field = win->field;
679 maxw = dev->crop_current.width;
680 maxh = dev->crop_current.height;
681
682 if (field == V4L2_FIELD_ANY) {
683 field = (win->w.height > maxh/2)
684 ? V4L2_FIELD_INTERLACED
685 : V4L2_FIELD_TOP;
686 }
687 switch (field) {
688 case V4L2_FIELD_TOP:
689 case V4L2_FIELD_BOTTOM:
690 maxh = maxh / 2;
691 break;
692 case V4L2_FIELD_INTERLACED:
693 break;
694 default:
695 return -EINVAL;
696 }
697
698 win->field = field;
699 if (win->w.width > maxw)
700 win->w.width = maxw;
701 if (win->w.height > maxh)
702 win->w.height = maxh;
703 return 0;
704 }
705
viu_activate_overlay(struct viu_reg * viu_reg)706 inline void viu_activate_overlay(struct viu_reg *viu_reg)
707 {
708 struct viu_reg *vr = viu_reg;
709
710 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
711 out_be32(&vr->dma_inc, reg_val.dma_inc);
712 out_be32(&vr->picture_count, reg_val.picture_count);
713 }
714
viu_setup_preview(struct viu_dev * dev,struct viu_fh * fh)715 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
716 {
717 int bpp;
718
719 dprintk(1, "%s %dx%d\n", __func__,
720 fh->win.w.width, fh->win.w.height);
721
722 reg_val.status_cfg = 0;
723
724 /* setup window */
725 reg_val.picture_count = (fh->win.w.height / 2) << 16 |
726 fh->win.w.width;
727
728 /* setup color depth and dma increment */
729 bpp = dev->ovfmt->depth / 8;
730 switch (bpp) {
731 case 2:
732 reg_val.status_cfg &= ~MODE_32BIT;
733 reg_val.dma_inc = fh->win.w.width * 2;
734 break;
735 case 4:
736 reg_val.status_cfg |= MODE_32BIT;
737 reg_val.dma_inc = fh->win.w.width * 4;
738 break;
739 default:
740 dprintk(0, "device doesn't support color depth(%d)\n",
741 bpp * 8);
742 return -EINVAL;
743 }
744
745 dev->ovfield = fh->win.field;
746 if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
747 reg_val.dma_inc = 0;
748
749 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
750
751 /* setup the base address of the overlay buffer */
752 reg_val.field_base_addr = (u32)dev->ovbuf.base;
753
754 return 0;
755 }
756
vidioc_s_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)757 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
758 struct v4l2_format *f)
759 {
760 struct viu_fh *fh = priv;
761 struct viu_dev *dev = (struct viu_dev *)fh->dev;
762 unsigned long flags;
763 int err;
764
765 err = verify_preview(dev, &f->fmt.win);
766 if (err)
767 return err;
768
769 fh->win = f->fmt.win;
770
771 spin_lock_irqsave(&dev->slock, flags);
772 viu_setup_preview(dev, fh);
773 spin_unlock_irqrestore(&dev->slock, flags);
774 return 0;
775 }
776
vidioc_try_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)777 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
778 struct v4l2_format *f)
779 {
780 return 0;
781 }
782
vidioc_overlay(struct file * file,void * priv,unsigned int on)783 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
784 {
785 struct viu_fh *fh = priv;
786 struct viu_dev *dev = (struct viu_dev *)fh->dev;
787 unsigned long flags;
788
789 if (on) {
790 spin_lock_irqsave(&dev->slock, flags);
791 viu_activate_overlay(dev->vr);
792 dev->ovenable = 1;
793
794 /* start dma */
795 viu_start_dma(dev);
796 spin_unlock_irqrestore(&dev->slock, flags);
797 } else {
798 viu_stop_dma(dev);
799 dev->ovenable = 0;
800 }
801
802 return 0;
803 }
804
vidioc_g_fbuf(struct file * file,void * priv,struct v4l2_framebuffer * arg)805 int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
806 {
807 struct viu_fh *fh = priv;
808 struct viu_dev *dev = fh->dev;
809 struct v4l2_framebuffer *fb = arg;
810
811 *fb = dev->ovbuf;
812 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
813 return 0;
814 }
815
vidioc_s_fbuf(struct file * file,void * priv,const struct v4l2_framebuffer * arg)816 int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
817 {
818 struct viu_fh *fh = priv;
819 struct viu_dev *dev = fh->dev;
820 const struct v4l2_framebuffer *fb = arg;
821 struct viu_fmt *fmt;
822
823 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
824 return -EPERM;
825
826 /* check args */
827 fmt = format_by_fourcc(fb->fmt.pixelformat);
828 if (fmt == NULL)
829 return -EINVAL;
830
831 /* ok, accept it */
832 dev->ovbuf = *fb;
833 dev->ovfmt = fmt;
834 if (dev->ovbuf.fmt.bytesperline == 0) {
835 dev->ovbuf.fmt.bytesperline =
836 dev->ovbuf.fmt.width * fmt->depth / 8;
837 }
838 return 0;
839 }
840
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * p)841 static int vidioc_reqbufs(struct file *file, void *priv,
842 struct v4l2_requestbuffers *p)
843 {
844 struct viu_fh *fh = priv;
845
846 return videobuf_reqbufs(&fh->vb_vidq, p);
847 }
848
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * p)849 static int vidioc_querybuf(struct file *file, void *priv,
850 struct v4l2_buffer *p)
851 {
852 struct viu_fh *fh = priv;
853
854 return videobuf_querybuf(&fh->vb_vidq, p);
855 }
856
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * p)857 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
858 {
859 struct viu_fh *fh = priv;
860
861 return videobuf_qbuf(&fh->vb_vidq, p);
862 }
863
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * p)864 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
865 {
866 struct viu_fh *fh = priv;
867
868 return videobuf_dqbuf(&fh->vb_vidq, p,
869 file->f_flags & O_NONBLOCK);
870 }
871
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type i)872 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
873 {
874 struct viu_fh *fh = priv;
875 struct viu_dev *dev = fh->dev;
876
877 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
878 return -EINVAL;
879 if (fh->type != i)
880 return -EINVAL;
881
882 if (dev->ovenable)
883 dev->ovenable = 0;
884
885 viu_start_dma(fh->dev);
886
887 return videobuf_streamon(&fh->vb_vidq);
888 }
889
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type i)890 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
891 {
892 struct viu_fh *fh = priv;
893
894 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
895 return -EINVAL;
896 if (fh->type != i)
897 return -EINVAL;
898
899 viu_stop_dma(fh->dev);
900
901 return videobuf_streamoff(&fh->vb_vidq);
902 }
903
904 #define decoder_call(viu, o, f, args...) \
905 v4l2_subdev_call(viu->decoder, o, f, ##args)
906
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * std_id)907 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
908 {
909 struct viu_fh *fh = priv;
910
911 decoder_call(fh->dev, video, querystd, std_id);
912 return 0;
913 }
914
vidioc_s_std(struct file * file,void * priv,v4l2_std_id id)915 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
916 {
917 struct viu_fh *fh = priv;
918
919 fh->dev->std = id;
920 decoder_call(fh->dev, video, s_std, id);
921 return 0;
922 }
923
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * std_id)924 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
925 {
926 struct viu_fh *fh = priv;
927
928 *std_id = fh->dev->std;
929 return 0;
930 }
931
932 /* only one input in this driver */
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * inp)933 static int vidioc_enum_input(struct file *file, void *priv,
934 struct v4l2_input *inp)
935 {
936 struct viu_fh *fh = priv;
937
938 if (inp->index != 0)
939 return -EINVAL;
940
941 inp->type = V4L2_INPUT_TYPE_CAMERA;
942 inp->std = fh->dev->vdev->tvnorms;
943 strcpy(inp->name, "Camera");
944 return 0;
945 }
946
vidioc_g_input(struct file * file,void * priv,unsigned int * i)947 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
948 {
949 *i = 0;
950 return 0;
951 }
952
vidioc_s_input(struct file * file,void * priv,unsigned int i)953 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
954 {
955 struct viu_fh *fh = priv;
956
957 if (i)
958 return -EINVAL;
959
960 decoder_call(fh->dev, video, s_routing, i, 0, 0);
961 return 0;
962 }
963
viu_activate_next_buf(struct viu_dev * dev,struct viu_dmaqueue * viuq)964 inline void viu_activate_next_buf(struct viu_dev *dev,
965 struct viu_dmaqueue *viuq)
966 {
967 struct viu_dmaqueue *vidq = viuq;
968 struct viu_buf *buf;
969
970 /* launch another DMA operation for an active/queued buffer */
971 if (!list_empty(&vidq->active)) {
972 buf = list_entry(vidq->active.next, struct viu_buf,
973 vb.queue);
974 dprintk(1, "start another queued buffer: 0x%p\n", buf);
975 buffer_activate(dev, buf);
976 } else if (!list_empty(&vidq->queued)) {
977 buf = list_entry(vidq->queued.next, struct viu_buf,
978 vb.queue);
979 list_del(&buf->vb.queue);
980
981 dprintk(1, "start another queued buffer: 0x%p\n", buf);
982 list_add_tail(&buf->vb.queue, &vidq->active);
983 buf->vb.state = VIDEOBUF_ACTIVE;
984 buffer_activate(dev, buf);
985 }
986 }
987
viu_default_settings(struct viu_reg * viu_reg)988 inline void viu_default_settings(struct viu_reg *viu_reg)
989 {
990 struct viu_reg *vr = viu_reg;
991
992 out_be32(&vr->luminance, 0x9512A254);
993 out_be32(&vr->chroma_r, 0x03310000);
994 out_be32(&vr->chroma_g, 0x06600F38);
995 out_be32(&vr->chroma_b, 0x00000409);
996 out_be32(&vr->alpha, 0x000000ff);
997 out_be32(&vr->req_alarm, 0x00000090);
998 dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
999 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
1000 }
1001
viu_overlay_intr(struct viu_dev * dev,u32 status)1002 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1003 {
1004 struct viu_reg *vr = dev->vr;
1005
1006 if (status & INT_DMA_END_STATUS)
1007 dev->dma_done = 1;
1008
1009 if (status & INT_FIELD_STATUS) {
1010 if (dev->dma_done) {
1011 u32 addr = reg_val.field_base_addr;
1012
1013 dev->dma_done = 0;
1014 if (status & FIELD_NO)
1015 addr += reg_val.dma_inc;
1016
1017 out_be32(&vr->field_base_addr, addr);
1018 out_be32(&vr->dma_inc, reg_val.dma_inc);
1019 out_be32(&vr->status_cfg,
1020 (status & 0xffc0ffff) |
1021 (status & INT_ALL_STATUS) |
1022 reg_val.status_cfg);
1023 } else if (status & INT_VSYNC_STATUS) {
1024 out_be32(&vr->status_cfg,
1025 (status & 0xffc0ffff) |
1026 (status & INT_ALL_STATUS) |
1027 reg_val.status_cfg);
1028 }
1029 }
1030 }
1031
viu_capture_intr(struct viu_dev * dev,u32 status)1032 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1033 {
1034 struct viu_dmaqueue *vidq = &dev->vidq;
1035 struct viu_reg *vr = dev->vr;
1036 struct viu_buf *buf;
1037 int field_num;
1038 int need_two;
1039 int dma_done = 0;
1040
1041 field_num = status & FIELD_NO;
1042 need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1043
1044 if (status & INT_DMA_END_STATUS) {
1045 dma_done = 1;
1046 if (((field_num == 0) && (dev->field == 0)) ||
1047 (field_num && (dev->field == 1)))
1048 dev->field++;
1049 }
1050
1051 if (status & INT_FIELD_STATUS) {
1052 dprintk(1, "irq: field %d, done %d\n",
1053 !!field_num, dma_done);
1054 if (unlikely(dev->first)) {
1055 if (field_num == 0) {
1056 dev->first = 0;
1057 dprintk(1, "activate first buf\n");
1058 viu_activate_next_buf(dev, vidq);
1059 } else
1060 dprintk(1, "wait field 0\n");
1061 return;
1062 }
1063
1064 /* setup buffer address for next dma operation */
1065 if (!list_empty(&vidq->active)) {
1066 u32 addr = reg_val.field_base_addr;
1067
1068 if (field_num && need_two) {
1069 addr += reg_val.dma_inc;
1070 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1071 (unsigned long)addr, dev->field);
1072 }
1073 out_be32(&vr->field_base_addr, addr);
1074 out_be32(&vr->dma_inc, reg_val.dma_inc);
1075 out_be32(&vr->status_cfg,
1076 (status & 0xffc0ffff) |
1077 (status & INT_ALL_STATUS) |
1078 reg_val.status_cfg);
1079 return;
1080 }
1081 }
1082
1083 if (dma_done && field_num && (dev->field == 2)) {
1084 dev->field = 0;
1085 buf = list_entry(vidq->active.next,
1086 struct viu_buf, vb.queue);
1087 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1088 buf, buf->vb.i,
1089 (unsigned long)videobuf_to_dma_contig(&buf->vb),
1090 (unsigned long)in_be32(&vr->field_base_addr));
1091
1092 if (waitqueue_active(&buf->vb.done)) {
1093 list_del(&buf->vb.queue);
1094 v4l2_get_timestamp(&buf->vb.ts);
1095 buf->vb.state = VIDEOBUF_DONE;
1096 buf->vb.field_count++;
1097 wake_up(&buf->vb.done);
1098 }
1099 /* activate next dma buffer */
1100 viu_activate_next_buf(dev, vidq);
1101 }
1102 }
1103
viu_intr(int irq,void * dev_id)1104 static irqreturn_t viu_intr(int irq, void *dev_id)
1105 {
1106 struct viu_dev *dev = (struct viu_dev *)dev_id;
1107 struct viu_reg *vr = dev->vr;
1108 u32 status;
1109 u32 error;
1110
1111 status = in_be32(&vr->status_cfg);
1112
1113 if (status & INT_ERROR_STATUS) {
1114 dev->irqs.error_irq++;
1115 error = status & ERR_MASK;
1116 if (error)
1117 dprintk(1, "Err: error(%d), times:%d!\n",
1118 error >> 4, dev->irqs.error_irq);
1119 /* Clear interrupt error bit and error flags */
1120 out_be32(&vr->status_cfg,
1121 (status & 0xffc0ffff) | INT_ERROR_STATUS);
1122 }
1123
1124 if (status & INT_DMA_END_STATUS) {
1125 dev->irqs.dma_end_irq++;
1126 dev->dma_done = 1;
1127 dprintk(2, "VIU DMA end interrupt times: %d\n",
1128 dev->irqs.dma_end_irq);
1129 }
1130
1131 if (status & INT_HSYNC_STATUS)
1132 dev->irqs.hsync_irq++;
1133
1134 if (status & INT_FIELD_STATUS) {
1135 dev->irqs.field_irq++;
1136 dprintk(2, "VIU field interrupt times: %d\n",
1137 dev->irqs.field_irq);
1138 }
1139
1140 if (status & INT_VSTART_STATUS)
1141 dev->irqs.vstart_irq++;
1142
1143 if (status & INT_VSYNC_STATUS) {
1144 dev->irqs.vsync_irq++;
1145 dprintk(2, "VIU vsync interrupt times: %d\n",
1146 dev->irqs.vsync_irq);
1147 }
1148
1149 /* clear all pending irqs */
1150 status = in_be32(&vr->status_cfg);
1151 out_be32(&vr->status_cfg,
1152 (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1153
1154 if (dev->ovenable) {
1155 viu_overlay_intr(dev, status);
1156 return IRQ_HANDLED;
1157 }
1158
1159 /* Capture mode */
1160 viu_capture_intr(dev, status);
1161 return IRQ_HANDLED;
1162 }
1163
1164 /*
1165 * File operations for the device
1166 */
viu_open(struct file * file)1167 static int viu_open(struct file *file)
1168 {
1169 struct video_device *vdev = video_devdata(file);
1170 struct viu_dev *dev = video_get_drvdata(vdev);
1171 struct viu_fh *fh;
1172 struct viu_reg *vr;
1173 int minor = vdev->minor;
1174 u32 status_cfg;
1175
1176 dprintk(1, "viu: open (minor=%d)\n", minor);
1177
1178 dev->users++;
1179 if (dev->users > 1) {
1180 dev->users--;
1181 return -EBUSY;
1182 }
1183
1184 vr = dev->vr;
1185
1186 dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1187 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1188
1189 if (mutex_lock_interruptible(&dev->lock)) {
1190 dev->users--;
1191 return -ERESTARTSYS;
1192 }
1193
1194 /* allocate and initialize per filehandle data */
1195 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1196 if (!fh) {
1197 dev->users--;
1198 mutex_unlock(&dev->lock);
1199 return -ENOMEM;
1200 }
1201
1202 v4l2_fh_init(&fh->fh, vdev);
1203 file->private_data = fh;
1204 fh->dev = dev;
1205
1206 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1207 fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1208 fh->width = norm_maxw();
1209 fh->height = norm_maxh();
1210 dev->crop_current.width = fh->width;
1211 dev->crop_current.height = fh->height;
1212
1213 dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1214 (unsigned long)fh, (unsigned long)dev,
1215 (unsigned long)&dev->vidq);
1216 dprintk(1, "Open: list_empty queued=%d\n",
1217 list_empty(&dev->vidq.queued));
1218 dprintk(1, "Open: list_empty active=%d\n",
1219 list_empty(&dev->vidq.active));
1220
1221 viu_default_settings(vr);
1222
1223 status_cfg = in_be32(&vr->status_cfg);
1224 out_be32(&vr->status_cfg,
1225 status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1226 INT_FIELD_EN | INT_VSTART_EN |
1227 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1228
1229 status_cfg = in_be32(&vr->status_cfg);
1230 out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1231
1232 spin_lock_init(&fh->vbq_lock);
1233 videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1234 dev->dev, &fh->vbq_lock,
1235 fh->type, V4L2_FIELD_INTERLACED,
1236 sizeof(struct viu_buf), fh,
1237 &fh->dev->lock);
1238 v4l2_fh_add(&fh->fh);
1239 mutex_unlock(&dev->lock);
1240 return 0;
1241 }
1242
viu_read(struct file * file,char __user * data,size_t count,loff_t * ppos)1243 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1244 loff_t *ppos)
1245 {
1246 struct viu_fh *fh = file->private_data;
1247 struct viu_dev *dev = fh->dev;
1248 int ret = 0;
1249
1250 dprintk(2, "%s\n", __func__);
1251 if (dev->ovenable)
1252 dev->ovenable = 0;
1253
1254 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1255 if (mutex_lock_interruptible(&dev->lock))
1256 return -ERESTARTSYS;
1257 viu_start_dma(dev);
1258 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1259 ppos, 0, file->f_flags & O_NONBLOCK);
1260 mutex_unlock(&dev->lock);
1261 return ret;
1262 }
1263 return 0;
1264 }
1265
viu_poll(struct file * file,struct poll_table_struct * wait)1266 static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1267 {
1268 struct viu_fh *fh = file->private_data;
1269 struct videobuf_queue *q = &fh->vb_vidq;
1270 struct viu_dev *dev = fh->dev;
1271 unsigned long req_events = poll_requested_events(wait);
1272 unsigned int res = v4l2_ctrl_poll(file, wait);
1273
1274 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1275 return POLLERR;
1276
1277 if (!(req_events & (POLLIN | POLLRDNORM)))
1278 return res;
1279
1280 mutex_lock(&dev->lock);
1281 res |= videobuf_poll_stream(file, q, wait);
1282 mutex_unlock(&dev->lock);
1283 return res;
1284 }
1285
viu_release(struct file * file)1286 static int viu_release(struct file *file)
1287 {
1288 struct viu_fh *fh = file->private_data;
1289 struct viu_dev *dev = fh->dev;
1290 int minor = video_devdata(file)->minor;
1291
1292 mutex_lock(&dev->lock);
1293 viu_stop_dma(dev);
1294 videobuf_stop(&fh->vb_vidq);
1295 videobuf_mmap_free(&fh->vb_vidq);
1296 v4l2_fh_del(&fh->fh);
1297 v4l2_fh_exit(&fh->fh);
1298 mutex_unlock(&dev->lock);
1299
1300 kfree(fh);
1301
1302 dev->users--;
1303 dprintk(1, "close (minor=%d, users=%d)\n",
1304 minor, dev->users);
1305 return 0;
1306 }
1307
viu_reset(struct viu_reg * reg)1308 void viu_reset(struct viu_reg *reg)
1309 {
1310 out_be32(®->status_cfg, 0);
1311 out_be32(®->luminance, 0x9512a254);
1312 out_be32(®->chroma_r, 0x03310000);
1313 out_be32(®->chroma_g, 0x06600f38);
1314 out_be32(®->chroma_b, 0x00000409);
1315 out_be32(®->field_base_addr, 0);
1316 out_be32(®->dma_inc, 0);
1317 out_be32(®->picture_count, 0x01e002d0);
1318 out_be32(®->req_alarm, 0x00000090);
1319 out_be32(®->alpha, 0x000000ff);
1320 }
1321
viu_mmap(struct file * file,struct vm_area_struct * vma)1322 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1323 {
1324 struct viu_fh *fh = file->private_data;
1325 struct viu_dev *dev = fh->dev;
1326 int ret;
1327
1328 dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1329
1330 if (mutex_lock_interruptible(&dev->lock))
1331 return -ERESTARTSYS;
1332 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1333 mutex_unlock(&dev->lock);
1334
1335 dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1336 (unsigned long)vma->vm_start,
1337 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1338 ret);
1339
1340 return ret;
1341 }
1342
1343 static const struct v4l2_file_operations viu_fops = {
1344 .owner = THIS_MODULE,
1345 .open = viu_open,
1346 .release = viu_release,
1347 .read = viu_read,
1348 .poll = viu_poll,
1349 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1350 .mmap = viu_mmap,
1351 };
1352
1353 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1354 .vidioc_querycap = vidioc_querycap,
1355 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
1356 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap,
1357 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
1358 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
1359 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1360 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1361 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1362 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1363 .vidioc_overlay = vidioc_overlay,
1364 .vidioc_g_fbuf = vidioc_g_fbuf,
1365 .vidioc_s_fbuf = vidioc_s_fbuf,
1366 .vidioc_reqbufs = vidioc_reqbufs,
1367 .vidioc_querybuf = vidioc_querybuf,
1368 .vidioc_qbuf = vidioc_qbuf,
1369 .vidioc_dqbuf = vidioc_dqbuf,
1370 .vidioc_g_std = vidioc_g_std,
1371 .vidioc_s_std = vidioc_s_std,
1372 .vidioc_querystd = vidioc_querystd,
1373 .vidioc_enum_input = vidioc_enum_input,
1374 .vidioc_g_input = vidioc_g_input,
1375 .vidioc_s_input = vidioc_s_input,
1376 .vidioc_streamon = vidioc_streamon,
1377 .vidioc_streamoff = vidioc_streamoff,
1378 .vidioc_log_status = v4l2_ctrl_log_status,
1379 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1380 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1381 };
1382
1383 static const struct video_device viu_template = {
1384 .name = "FSL viu",
1385 .fops = &viu_fops,
1386 .minor = -1,
1387 .ioctl_ops = &viu_ioctl_ops,
1388 .release = video_device_release,
1389
1390 .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1391 };
1392
viu_of_probe(struct platform_device * op)1393 static int viu_of_probe(struct platform_device *op)
1394 {
1395 struct viu_dev *viu_dev;
1396 struct video_device *vdev;
1397 struct resource r;
1398 struct viu_reg __iomem *viu_regs;
1399 struct i2c_adapter *ad;
1400 int ret, viu_irq;
1401 struct clk *clk;
1402
1403 ret = of_address_to_resource(op->dev.of_node, 0, &r);
1404 if (ret) {
1405 dev_err(&op->dev, "Can't parse device node resource\n");
1406 return -ENODEV;
1407 }
1408
1409 viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1410 if (viu_irq == NO_IRQ) {
1411 dev_err(&op->dev, "Error while mapping the irq\n");
1412 return -EINVAL;
1413 }
1414
1415 /* request mem region */
1416 if (!devm_request_mem_region(&op->dev, r.start,
1417 sizeof(struct viu_reg), DRV_NAME)) {
1418 dev_err(&op->dev, "Error while requesting mem region\n");
1419 ret = -EBUSY;
1420 goto err_irq;
1421 }
1422
1423 /* remap registers */
1424 viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1425 if (!viu_regs) {
1426 dev_err(&op->dev, "Can't map register set\n");
1427 ret = -ENOMEM;
1428 goto err_irq;
1429 }
1430
1431 /* Prepare our private structure */
1432 viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1433 if (!viu_dev) {
1434 dev_err(&op->dev, "Can't allocate private structure\n");
1435 ret = -ENOMEM;
1436 goto err_irq;
1437 }
1438
1439 viu_dev->vr = viu_regs;
1440 viu_dev->irq = viu_irq;
1441 viu_dev->dev = &op->dev;
1442
1443 /* init video dma queues */
1444 INIT_LIST_HEAD(&viu_dev->vidq.active);
1445 INIT_LIST_HEAD(&viu_dev->vidq.queued);
1446
1447 snprintf(viu_dev->v4l2_dev.name,
1448 sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1449 ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1450 if (ret < 0) {
1451 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1452 goto err_irq;
1453 }
1454
1455 ad = i2c_get_adapter(0);
1456 if (!ad) {
1457 ret = -EFAULT;
1458 dev_err(&op->dev, "couldn't get i2c adapter\n");
1459 goto err_v4l2;
1460 }
1461
1462 v4l2_ctrl_handler_init(&viu_dev->hdl, 5);
1463 if (viu_dev->hdl.error) {
1464 ret = viu_dev->hdl.error;
1465 dev_err(&op->dev, "couldn't register control\n");
1466 goto err_i2c;
1467 }
1468 /* This control handler will inherit the control(s) from the
1469 sub-device(s). */
1470 viu_dev->v4l2_dev.ctrl_handler = &viu_dev->hdl;
1471 viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1472 "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1473
1474 setup_timer(&viu_dev->vidq.timeout, viu_vid_timeout,
1475 (unsigned long)viu_dev);
1476 viu_dev->std = V4L2_STD_NTSC_M;
1477 viu_dev->first = 1;
1478
1479 /* Allocate memory for video device */
1480 vdev = video_device_alloc();
1481 if (vdev == NULL) {
1482 ret = -ENOMEM;
1483 goto err_hdl;
1484 }
1485
1486 *vdev = viu_template;
1487
1488 vdev->v4l2_dev = &viu_dev->v4l2_dev;
1489
1490 viu_dev->vdev = vdev;
1491
1492 /* initialize locks */
1493 mutex_init(&viu_dev->lock);
1494 viu_dev->vdev->lock = &viu_dev->lock;
1495 spin_lock_init(&viu_dev->slock);
1496
1497 video_set_drvdata(viu_dev->vdev, viu_dev);
1498
1499 mutex_lock(&viu_dev->lock);
1500
1501 ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1502 if (ret < 0) {
1503 video_device_release(viu_dev->vdev);
1504 goto err_unlock;
1505 }
1506
1507 /* enable VIU clock */
1508 clk = devm_clk_get(&op->dev, "ipg");
1509 if (IS_ERR(clk)) {
1510 dev_err(&op->dev, "failed to lookup the clock!\n");
1511 ret = PTR_ERR(clk);
1512 goto err_vdev;
1513 }
1514 ret = clk_prepare_enable(clk);
1515 if (ret) {
1516 dev_err(&op->dev, "failed to enable the clock!\n");
1517 goto err_vdev;
1518 }
1519 viu_dev->clk = clk;
1520
1521 /* reset VIU module */
1522 viu_reset(viu_dev->vr);
1523
1524 /* install interrupt handler */
1525 if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1526 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1527 ret = -ENODEV;
1528 goto err_clk;
1529 }
1530
1531 mutex_unlock(&viu_dev->lock);
1532
1533 dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1534 return ret;
1535
1536 err_clk:
1537 clk_disable_unprepare(viu_dev->clk);
1538 err_vdev:
1539 video_unregister_device(viu_dev->vdev);
1540 err_unlock:
1541 mutex_unlock(&viu_dev->lock);
1542 err_hdl:
1543 v4l2_ctrl_handler_free(&viu_dev->hdl);
1544 err_i2c:
1545 i2c_put_adapter(ad);
1546 err_v4l2:
1547 v4l2_device_unregister(&viu_dev->v4l2_dev);
1548 err_irq:
1549 irq_dispose_mapping(viu_irq);
1550 return ret;
1551 }
1552
viu_of_remove(struct platform_device * op)1553 static int viu_of_remove(struct platform_device *op)
1554 {
1555 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1556 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1557 struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1558 struct v4l2_subdev, list);
1559 struct i2c_client *client = v4l2_get_subdevdata(sdev);
1560
1561 free_irq(dev->irq, (void *)dev);
1562 irq_dispose_mapping(dev->irq);
1563
1564 clk_disable_unprepare(dev->clk);
1565
1566 v4l2_ctrl_handler_free(&dev->hdl);
1567 video_unregister_device(dev->vdev);
1568 i2c_put_adapter(client->adapter);
1569 v4l2_device_unregister(&dev->v4l2_dev);
1570 return 0;
1571 }
1572
1573 #ifdef CONFIG_PM
viu_suspend(struct platform_device * op,pm_message_t state)1574 static int viu_suspend(struct platform_device *op, pm_message_t state)
1575 {
1576 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1577 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1578
1579 clk_disable(dev->clk);
1580 return 0;
1581 }
1582
viu_resume(struct platform_device * op)1583 static int viu_resume(struct platform_device *op)
1584 {
1585 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1586 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1587
1588 clk_enable(dev->clk);
1589 return 0;
1590 }
1591 #endif
1592
1593 /*
1594 * Initialization and module stuff
1595 */
1596 static const struct of_device_id mpc512x_viu_of_match[] = {
1597 {
1598 .compatible = "fsl,mpc5121-viu",
1599 },
1600 {},
1601 };
1602 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1603
1604 static struct platform_driver viu_of_platform_driver = {
1605 .probe = viu_of_probe,
1606 .remove = viu_of_remove,
1607 #ifdef CONFIG_PM
1608 .suspend = viu_suspend,
1609 .resume = viu_resume,
1610 #endif
1611 .driver = {
1612 .name = DRV_NAME,
1613 .of_match_table = mpc512x_viu_of_match,
1614 },
1615 };
1616
1617 module_platform_driver(viu_of_platform_driver);
1618
1619 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1620 MODULE_AUTHOR("Hongjun Chen");
1621 MODULE_LICENSE("GPL");
1622 MODULE_VERSION(VIU_VERSION);
1623