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_platform.h>
25 #include <linux/slab.h>
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/videobuf-dma-contig.h>
30
31 #define DRV_NAME "fsl_viu"
32 #define VIU_VERSION "0.5.1"
33
34 #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
35
36 #define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */
37
38 /* I2C address of video decoder chip is 0x4A */
39 #define VIU_VIDEO_DECODER_ADDR 0x25
40
41 /* supported controls */
42 static struct v4l2_queryctrl viu_qctrl[] = {
43 {
44 .id = V4L2_CID_BRIGHTNESS,
45 .type = V4L2_CTRL_TYPE_INTEGER,
46 .name = "Brightness",
47 .minimum = 0,
48 .maximum = 255,
49 .step = 1,
50 .default_value = 127,
51 .flags = 0,
52 }, {
53 .id = V4L2_CID_CONTRAST,
54 .type = V4L2_CTRL_TYPE_INTEGER,
55 .name = "Contrast",
56 .minimum = 0,
57 .maximum = 255,
58 .step = 0x1,
59 .default_value = 0x10,
60 .flags = 0,
61 }, {
62 .id = V4L2_CID_SATURATION,
63 .type = V4L2_CTRL_TYPE_INTEGER,
64 .name = "Saturation",
65 .minimum = 0,
66 .maximum = 255,
67 .step = 0x1,
68 .default_value = 127,
69 .flags = 0,
70 }, {
71 .id = V4L2_CID_HUE,
72 .type = V4L2_CTRL_TYPE_INTEGER,
73 .name = "Hue",
74 .minimum = -128,
75 .maximum = 127,
76 .step = 0x1,
77 .default_value = 0,
78 .flags = 0,
79 }
80 };
81
82 static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
83
84 static int info_level;
85
86 #define dprintk(level, fmt, arg...) \
87 do { \
88 if (level <= info_level) \
89 printk(KERN_DEBUG "viu: " fmt , ## arg); \
90 } while (0)
91
92 /*
93 * Basic structures
94 */
95 struct viu_fmt {
96 char name[32];
97 u32 fourcc; /* v4l2 format id */
98 u32 pixelformat;
99 int depth;
100 };
101
102 static struct viu_fmt formats[] = {
103 {
104 .name = "RGB-16 (5/B-6/G-5/R)",
105 .fourcc = V4L2_PIX_FMT_RGB565,
106 .pixelformat = V4L2_PIX_FMT_RGB565,
107 .depth = 16,
108 }, {
109 .name = "RGB-32 (A-R-G-B)",
110 .fourcc = V4L2_PIX_FMT_RGB32,
111 .pixelformat = V4L2_PIX_FMT_RGB32,
112 .depth = 32,
113 }
114 };
115
116 struct viu_dev;
117 struct viu_buf;
118
119 /* buffer for one video frame */
120 struct viu_buf {
121 /* common v4l buffer stuff -- must be first */
122 struct videobuf_buffer vb;
123 struct viu_fmt *fmt;
124 };
125
126 struct viu_dmaqueue {
127 struct viu_dev *dev;
128 struct list_head active;
129 struct list_head queued;
130 struct timer_list timeout;
131 };
132
133 struct viu_status {
134 u32 field_irq;
135 u32 vsync_irq;
136 u32 hsync_irq;
137 u32 vstart_irq;
138 u32 dma_end_irq;
139 u32 error_irq;
140 };
141
142 struct viu_reg {
143 u32 status_cfg;
144 u32 luminance;
145 u32 chroma_r;
146 u32 chroma_g;
147 u32 chroma_b;
148 u32 field_base_addr;
149 u32 dma_inc;
150 u32 picture_count;
151 u32 req_alarm;
152 u32 alpha;
153 } __attribute__ ((packed));
154
155 struct viu_dev {
156 struct v4l2_device v4l2_dev;
157 struct mutex lock;
158 spinlock_t slock;
159 int users;
160
161 struct device *dev;
162 /* various device info */
163 struct video_device *vdev;
164 struct viu_dmaqueue vidq;
165 enum v4l2_field capfield;
166 int field;
167 int first;
168 int dma_done;
169
170 /* Hardware register area */
171 struct viu_reg *vr;
172
173 /* Interrupt vector */
174 int irq;
175 struct viu_status irqs;
176
177 /* video overlay */
178 struct v4l2_framebuffer ovbuf;
179 struct viu_fmt *ovfmt;
180 unsigned int ovenable;
181 enum v4l2_field ovfield;
182
183 /* crop */
184 struct v4l2_rect crop_current;
185
186 /* clock pointer */
187 struct clk *clk;
188
189 /* decoder */
190 struct v4l2_subdev *decoder;
191
192 v4l2_std_id std;
193 };
194
195 struct viu_fh {
196 struct viu_dev *dev;
197
198 /* video capture */
199 struct videobuf_queue vb_vidq;
200 spinlock_t vbq_lock; /* spinlock for the videobuf queue */
201
202 /* video overlay */
203 struct v4l2_window win;
204 struct v4l2_clip clips[1];
205
206 /* video capture */
207 struct viu_fmt *fmt;
208 int width, height, sizeimage;
209 enum v4l2_buf_type type;
210 };
211
212 static struct viu_reg reg_val;
213
214 /*
215 * Macro definitions of VIU registers
216 */
217
218 /* STATUS_CONFIG register */
219 enum status_config {
220 SOFT_RST = 1 << 0,
221
222 ERR_MASK = 0x0f << 4, /* Error code mask */
223 ERR_NO = 0x00, /* No error */
224 ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */
225 ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */
226 ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */
227 ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */
228 ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */
229 ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */
230 ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */
231 ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */
232 ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */
233 ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */
234
235 INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */
236 INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */
237 INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */
238 INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */
239 INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */
240 INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */
241 INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */
242
243 INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */
244 INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */
245 INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */
246 INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */
247 INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */
248 INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */
249
250 DMA_ACT = 0x01 << 27, /* Enable DMA transfer */
251 FIELD_NO = 0x01 << 28, /* Field number */
252 DITHER_ON = 0x01 << 29, /* Dithering is on */
253 ROUND_ON = 0x01 << 30, /* Round is on */
254 MODE_32BIT = 0x01 << 31, /* Data in RGBa888,
255 * 0 in RGB565
256 */
257 };
258
259 #define norm_maxw() 720
260 #define norm_maxh() 576
261
262 #define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
263 INT_HSYNC_STATUS | INT_VSTART_STATUS | \
264 INT_DMA_END_STATUS | INT_ERROR_STATUS)
265
266 #define NUM_FORMATS ARRAY_SIZE(formats)
267
268 static irqreturn_t viu_intr(int irq, void *dev_id);
269
format_by_fourcc(int fourcc)270 struct viu_fmt *format_by_fourcc(int fourcc)
271 {
272 int i;
273
274 for (i = 0; i < NUM_FORMATS; i++) {
275 if (formats[i].pixelformat == fourcc)
276 return formats + i;
277 }
278
279 dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
280 return NULL;
281 }
282
viu_start_dma(struct viu_dev * dev)283 void viu_start_dma(struct viu_dev *dev)
284 {
285 struct viu_reg *vr = dev->vr;
286
287 dev->field = 0;
288
289 /* Enable DMA operation */
290 out_be32(&vr->status_cfg, SOFT_RST);
291 out_be32(&vr->status_cfg, INT_FIELD_EN);
292 }
293
viu_stop_dma(struct viu_dev * dev)294 void viu_stop_dma(struct viu_dev *dev)
295 {
296 struct viu_reg *vr = dev->vr;
297 int cnt = 100;
298 u32 status_cfg;
299
300 out_be32(&vr->status_cfg, 0);
301
302 /* Clear pending interrupts */
303 status_cfg = in_be32(&vr->status_cfg);
304 if (status_cfg & 0x3f0000)
305 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
306
307 if (status_cfg & DMA_ACT) {
308 do {
309 status_cfg = in_be32(&vr->status_cfg);
310 if (status_cfg & INT_DMA_END_STATUS)
311 break;
312 } while (cnt--);
313
314 if (cnt < 0) {
315 /* timed out, issue soft reset */
316 out_be32(&vr->status_cfg, SOFT_RST);
317 out_be32(&vr->status_cfg, 0);
318 } else {
319 /* clear DMA_END and other pending irqs */
320 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
321 }
322 }
323
324 dev->field = 0;
325 }
326
restart_video_queue(struct viu_dmaqueue * vidq)327 static int restart_video_queue(struct viu_dmaqueue *vidq)
328 {
329 struct viu_buf *buf, *prev;
330
331 dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
332 if (!list_empty(&vidq->active)) {
333 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
334 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
335 buf, buf->vb.i);
336
337 viu_stop_dma(vidq->dev);
338
339 /* cancel all outstanding capture requests */
340 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
341 list_del(&buf->vb.queue);
342 buf->vb.state = VIDEOBUF_ERROR;
343 wake_up(&buf->vb.done);
344 }
345 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
346 return 0;
347 }
348
349 prev = NULL;
350 for (;;) {
351 if (list_empty(&vidq->queued))
352 return 0;
353 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
354 if (prev == NULL) {
355 list_del(&buf->vb.queue);
356 list_add_tail(&buf->vb.queue, &vidq->active);
357
358 dprintk(1, "Restarting video dma\n");
359 viu_stop_dma(vidq->dev);
360 viu_start_dma(vidq->dev);
361
362 buf->vb.state = VIDEOBUF_ACTIVE;
363 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
364 dprintk(2, "[%p/%d] restart_queue - first active\n",
365 buf, buf->vb.i);
366
367 } else if (prev->vb.width == buf->vb.width &&
368 prev->vb.height == buf->vb.height &&
369 prev->fmt == buf->fmt) {
370 list_del(&buf->vb.queue);
371 list_add_tail(&buf->vb.queue, &vidq->active);
372 buf->vb.state = VIDEOBUF_ACTIVE;
373 dprintk(2, "[%p/%d] restart_queue - move to active\n",
374 buf, buf->vb.i);
375 } else {
376 return 0;
377 }
378 prev = buf;
379 }
380 }
381
viu_vid_timeout(unsigned long data)382 static void viu_vid_timeout(unsigned long data)
383 {
384 struct viu_dev *dev = (struct viu_dev *)data;
385 struct viu_buf *buf;
386 struct viu_dmaqueue *vidq = &dev->vidq;
387
388 while (!list_empty(&vidq->active)) {
389 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
390 list_del(&buf->vb.queue);
391 buf->vb.state = VIDEOBUF_ERROR;
392 wake_up(&buf->vb.done);
393 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
394 }
395
396 restart_video_queue(vidq);
397 }
398
399 /*
400 * Videobuf operations
401 */
buffer_setup(struct videobuf_queue * vq,unsigned int * count,unsigned int * size)402 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
403 unsigned int *size)
404 {
405 struct viu_fh *fh = vq->priv_data;
406
407 *size = fh->width * fh->height * fh->fmt->depth >> 3;
408 if (*count == 0)
409 *count = 32;
410
411 while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
412 (*count)--;
413
414 dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
415 return 0;
416 }
417
free_buffer(struct videobuf_queue * vq,struct viu_buf * buf)418 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
419 {
420 struct videobuf_buffer *vb = &buf->vb;
421 void *vaddr = NULL;
422
423 BUG_ON(in_interrupt());
424
425 videobuf_waiton(vq, &buf->vb, 0, 0);
426
427 if (vq->int_ops && vq->int_ops->vaddr)
428 vaddr = vq->int_ops->vaddr(vb);
429
430 if (vaddr)
431 videobuf_dma_contig_free(vq, &buf->vb);
432
433 buf->vb.state = VIDEOBUF_NEEDS_INIT;
434 }
435
buffer_activate(struct viu_dev * dev,struct viu_buf * buf)436 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
437 {
438 struct viu_reg *vr = dev->vr;
439 int bpp;
440
441 /* setup the DMA base address */
442 reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
443
444 dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
445 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
446
447 /* interlace is on by default, set horizontal DMA increment */
448 reg_val.status_cfg = 0;
449 bpp = buf->fmt->depth >> 3;
450 switch (bpp) {
451 case 2:
452 reg_val.status_cfg &= ~MODE_32BIT;
453 reg_val.dma_inc = buf->vb.width * 2;
454 break;
455 case 4:
456 reg_val.status_cfg |= MODE_32BIT;
457 reg_val.dma_inc = buf->vb.width * 4;
458 break;
459 default:
460 dprintk(0, "doesn't support color depth(%d)\n",
461 bpp * 8);
462 return -EINVAL;
463 }
464
465 /* setup picture_count register */
466 reg_val.picture_count = (buf->vb.height / 2) << 16 |
467 buf->vb.width;
468
469 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
470
471 buf->vb.state = VIDEOBUF_ACTIVE;
472 dev->capfield = buf->vb.field;
473
474 /* reset dma increment if needed */
475 if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
476 reg_val.dma_inc = 0;
477
478 out_be32(&vr->dma_inc, reg_val.dma_inc);
479 out_be32(&vr->picture_count, reg_val.picture_count);
480 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
481 mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
482 return 0;
483 }
484
buffer_prepare(struct videobuf_queue * vq,struct videobuf_buffer * vb,enum v4l2_field field)485 static int buffer_prepare(struct videobuf_queue *vq,
486 struct videobuf_buffer *vb,
487 enum v4l2_field field)
488 {
489 struct viu_fh *fh = vq->priv_data;
490 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
491 int rc;
492
493 BUG_ON(fh->fmt == NULL);
494
495 if (fh->width < 48 || fh->width > norm_maxw() ||
496 fh->height < 32 || fh->height > norm_maxh())
497 return -EINVAL;
498 buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
499 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
500 return -EINVAL;
501
502 if (buf->fmt != fh->fmt ||
503 buf->vb.width != fh->width ||
504 buf->vb.height != fh->height ||
505 buf->vb.field != field) {
506 buf->fmt = fh->fmt;
507 buf->vb.width = fh->width;
508 buf->vb.height = fh->height;
509 buf->vb.field = field;
510 }
511
512 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
513 rc = videobuf_iolock(vq, &buf->vb, NULL);
514 if (rc != 0)
515 goto fail;
516
517 buf->vb.width = fh->width;
518 buf->vb.height = fh->height;
519 buf->vb.field = field;
520 buf->fmt = fh->fmt;
521 }
522
523 buf->vb.state = VIDEOBUF_PREPARED;
524 return 0;
525
526 fail:
527 free_buffer(vq, buf);
528 return rc;
529 }
530
buffer_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)531 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
532 {
533 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
534 struct viu_fh *fh = vq->priv_data;
535 struct viu_dev *dev = fh->dev;
536 struct viu_dmaqueue *vidq = &dev->vidq;
537 struct viu_buf *prev;
538
539 if (!list_empty(&vidq->queued)) {
540 dprintk(1, "adding vb queue=0x%08lx\n",
541 (unsigned long)&buf->vb.queue);
542 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
543 vidq, &vidq->queued);
544 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
545 dev, &vidq->queued, vidq->queued.next,
546 vidq->queued.prev);
547 list_add_tail(&buf->vb.queue, &vidq->queued);
548 buf->vb.state = VIDEOBUF_QUEUED;
549 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
550 buf, buf->vb.i);
551 } else if (list_empty(&vidq->active)) {
552 dprintk(1, "adding vb active=0x%08lx\n",
553 (unsigned long)&buf->vb.queue);
554 list_add_tail(&buf->vb.queue, &vidq->active);
555 buf->vb.state = VIDEOBUF_ACTIVE;
556 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
557 dprintk(2, "[%p/%d] buffer_queue - first active\n",
558 buf, buf->vb.i);
559
560 buffer_activate(dev, buf);
561 } else {
562 dprintk(1, "adding vb queue2=0x%08lx\n",
563 (unsigned long)&buf->vb.queue);
564 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
565 if (prev->vb.width == buf->vb.width &&
566 prev->vb.height == buf->vb.height &&
567 prev->fmt == buf->fmt) {
568 list_add_tail(&buf->vb.queue, &vidq->active);
569 buf->vb.state = VIDEOBUF_ACTIVE;
570 dprintk(2, "[%p/%d] buffer_queue - append to active\n",
571 buf, buf->vb.i);
572 } else {
573 list_add_tail(&buf->vb.queue, &vidq->queued);
574 buf->vb.state = VIDEOBUF_QUEUED;
575 dprintk(2, "[%p/%d] buffer_queue - first queued\n",
576 buf, buf->vb.i);
577 }
578 }
579 }
580
buffer_release(struct videobuf_queue * vq,struct videobuf_buffer * vb)581 static void buffer_release(struct videobuf_queue *vq,
582 struct videobuf_buffer *vb)
583 {
584 struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
585 struct viu_fh *fh = vq->priv_data;
586 struct viu_dev *dev = (struct viu_dev *)fh->dev;
587
588 viu_stop_dma(dev);
589 free_buffer(vq, buf);
590 }
591
592 static struct videobuf_queue_ops viu_video_qops = {
593 .buf_setup = buffer_setup,
594 .buf_prepare = buffer_prepare,
595 .buf_queue = buffer_queue,
596 .buf_release = buffer_release,
597 };
598
599 /*
600 * IOCTL vidioc handling
601 */
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)602 static int vidioc_querycap(struct file *file, void *priv,
603 struct v4l2_capability *cap)
604 {
605 strcpy(cap->driver, "viu");
606 strcpy(cap->card, "viu");
607 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
608 V4L2_CAP_STREAMING |
609 V4L2_CAP_VIDEO_OVERLAY |
610 V4L2_CAP_READWRITE;
611 return 0;
612 }
613
vidioc_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)614 static int vidioc_enum_fmt(struct file *file, void *priv,
615 struct v4l2_fmtdesc *f)
616 {
617 int index = f->index;
618
619 if (f->index > NUM_FORMATS)
620 return -EINVAL;
621
622 strlcpy(f->description, formats[index].name, sizeof(f->description));
623 f->pixelformat = formats[index].fourcc;
624 return 0;
625 }
626
vidioc_g_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)627 static int vidioc_g_fmt_cap(struct file *file, void *priv,
628 struct v4l2_format *f)
629 {
630 struct viu_fh *fh = priv;
631
632 f->fmt.pix.width = fh->width;
633 f->fmt.pix.height = fh->height;
634 f->fmt.pix.field = fh->vb_vidq.field;
635 f->fmt.pix.pixelformat = fh->fmt->pixelformat;
636 f->fmt.pix.bytesperline =
637 (f->fmt.pix.width * fh->fmt->depth) >> 3;
638 f->fmt.pix.sizeimage = fh->sizeimage;
639 return 0;
640 }
641
vidioc_try_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)642 static int vidioc_try_fmt_cap(struct file *file, void *priv,
643 struct v4l2_format *f)
644 {
645 struct viu_fmt *fmt;
646 enum v4l2_field field;
647 unsigned int maxw, maxh;
648
649 fmt = format_by_fourcc(f->fmt.pix.pixelformat);
650 if (!fmt) {
651 dprintk(1, "Fourcc format (0x%08x) invalid.",
652 f->fmt.pix.pixelformat);
653 return -EINVAL;
654 }
655
656 field = f->fmt.pix.field;
657
658 if (field == V4L2_FIELD_ANY) {
659 field = V4L2_FIELD_INTERLACED;
660 } else if (field != V4L2_FIELD_INTERLACED) {
661 dprintk(1, "Field type invalid.\n");
662 return -EINVAL;
663 }
664
665 maxw = norm_maxw();
666 maxh = norm_maxh();
667
668 f->fmt.pix.field = field;
669 if (f->fmt.pix.height < 32)
670 f->fmt.pix.height = 32;
671 if (f->fmt.pix.height > maxh)
672 f->fmt.pix.height = maxh;
673 if (f->fmt.pix.width < 48)
674 f->fmt.pix.width = 48;
675 if (f->fmt.pix.width > maxw)
676 f->fmt.pix.width = maxw;
677 f->fmt.pix.width &= ~0x03;
678 f->fmt.pix.bytesperline =
679 (f->fmt.pix.width * fmt->depth) >> 3;
680
681 return 0;
682 }
683
vidioc_s_fmt_cap(struct file * file,void * priv,struct v4l2_format * f)684 static int vidioc_s_fmt_cap(struct file *file, void *priv,
685 struct v4l2_format *f)
686 {
687 struct viu_fh *fh = priv;
688 int ret;
689
690 ret = vidioc_try_fmt_cap(file, fh, f);
691 if (ret < 0)
692 return ret;
693
694 fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
695 fh->width = f->fmt.pix.width;
696 fh->height = f->fmt.pix.height;
697 fh->sizeimage = f->fmt.pix.sizeimage;
698 fh->vb_vidq.field = f->fmt.pix.field;
699 fh->type = f->type;
700 dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
701 return 0;
702 }
703
vidioc_g_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)704 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
705 struct v4l2_format *f)
706 {
707 struct viu_fh *fh = priv;
708
709 f->fmt.win = fh->win;
710 return 0;
711 }
712
verify_preview(struct viu_dev * dev,struct v4l2_window * win)713 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
714 {
715 enum v4l2_field field;
716 int maxw, maxh;
717
718 if (dev->ovbuf.base == NULL)
719 return -EINVAL;
720 if (dev->ovfmt == NULL)
721 return -EINVAL;
722 if (win->w.width < 48 || win->w.height < 32)
723 return -EINVAL;
724
725 field = win->field;
726 maxw = dev->crop_current.width;
727 maxh = dev->crop_current.height;
728
729 if (field == V4L2_FIELD_ANY) {
730 field = (win->w.height > maxh/2)
731 ? V4L2_FIELD_INTERLACED
732 : V4L2_FIELD_TOP;
733 }
734 switch (field) {
735 case V4L2_FIELD_TOP:
736 case V4L2_FIELD_BOTTOM:
737 maxh = maxh / 2;
738 break;
739 case V4L2_FIELD_INTERLACED:
740 break;
741 default:
742 return -EINVAL;
743 }
744
745 win->field = field;
746 if (win->w.width > maxw)
747 win->w.width = maxw;
748 if (win->w.height > maxh)
749 win->w.height = maxh;
750 return 0;
751 }
752
viu_activate_overlay(struct viu_reg * viu_reg)753 inline void viu_activate_overlay(struct viu_reg *viu_reg)
754 {
755 struct viu_reg *vr = viu_reg;
756
757 out_be32(&vr->field_base_addr, reg_val.field_base_addr);
758 out_be32(&vr->dma_inc, reg_val.dma_inc);
759 out_be32(&vr->picture_count, reg_val.picture_count);
760 }
761
viu_setup_preview(struct viu_dev * dev,struct viu_fh * fh)762 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
763 {
764 int bpp;
765
766 dprintk(1, "%s %dx%d %s\n", __func__,
767 fh->win.w.width, fh->win.w.height, dev->ovfmt->name);
768
769 reg_val.status_cfg = 0;
770
771 /* setup window */
772 reg_val.picture_count = (fh->win.w.height / 2) << 16 |
773 fh->win.w.width;
774
775 /* setup color depth and dma increment */
776 bpp = dev->ovfmt->depth / 8;
777 switch (bpp) {
778 case 2:
779 reg_val.status_cfg &= ~MODE_32BIT;
780 reg_val.dma_inc = fh->win.w.width * 2;
781 break;
782 case 4:
783 reg_val.status_cfg |= MODE_32BIT;
784 reg_val.dma_inc = fh->win.w.width * 4;
785 break;
786 default:
787 dprintk(0, "device doesn't support color depth(%d)\n",
788 bpp * 8);
789 return -EINVAL;
790 }
791
792 dev->ovfield = fh->win.field;
793 if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
794 reg_val.dma_inc = 0;
795
796 reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
797
798 /* setup the base address of the overlay buffer */
799 reg_val.field_base_addr = (u32)dev->ovbuf.base;
800
801 return 0;
802 }
803
vidioc_s_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)804 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
805 struct v4l2_format *f)
806 {
807 struct viu_fh *fh = priv;
808 struct viu_dev *dev = (struct viu_dev *)fh->dev;
809 unsigned long flags;
810 int err;
811
812 err = verify_preview(dev, &f->fmt.win);
813 if (err)
814 return err;
815
816 fh->win = f->fmt.win;
817
818 spin_lock_irqsave(&dev->slock, flags);
819 viu_setup_preview(dev, fh);
820 spin_unlock_irqrestore(&dev->slock, flags);
821 return 0;
822 }
823
vidioc_try_fmt_overlay(struct file * file,void * priv,struct v4l2_format * f)824 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
825 struct v4l2_format *f)
826 {
827 return 0;
828 }
829
vidioc_overlay(struct file * file,void * priv,unsigned int on)830 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
831 {
832 struct viu_fh *fh = priv;
833 struct viu_dev *dev = (struct viu_dev *)fh->dev;
834 unsigned long flags;
835
836 if (on) {
837 spin_lock_irqsave(&dev->slock, flags);
838 viu_activate_overlay(dev->vr);
839 dev->ovenable = 1;
840
841 /* start dma */
842 viu_start_dma(dev);
843 spin_unlock_irqrestore(&dev->slock, flags);
844 } else {
845 viu_stop_dma(dev);
846 dev->ovenable = 0;
847 }
848
849 return 0;
850 }
851
vidioc_g_fbuf(struct file * file,void * priv,struct v4l2_framebuffer * arg)852 int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
853 {
854 struct viu_fh *fh = priv;
855 struct viu_dev *dev = fh->dev;
856 struct v4l2_framebuffer *fb = arg;
857
858 *fb = dev->ovbuf;
859 fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
860 return 0;
861 }
862
vidioc_s_fbuf(struct file * file,void * priv,struct v4l2_framebuffer * arg)863 int vidioc_s_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
864 {
865 struct viu_fh *fh = priv;
866 struct viu_dev *dev = fh->dev;
867 struct v4l2_framebuffer *fb = arg;
868 struct viu_fmt *fmt;
869
870 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
871 return -EPERM;
872
873 /* check args */
874 fmt = format_by_fourcc(fb->fmt.pixelformat);
875 if (fmt == NULL)
876 return -EINVAL;
877
878 /* ok, accept it */
879 dev->ovbuf = *fb;
880 dev->ovfmt = fmt;
881 if (dev->ovbuf.fmt.bytesperline == 0) {
882 dev->ovbuf.fmt.bytesperline =
883 dev->ovbuf.fmt.width * fmt->depth / 8;
884 }
885 return 0;
886 }
887
vidioc_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * p)888 static int vidioc_reqbufs(struct file *file, void *priv,
889 struct v4l2_requestbuffers *p)
890 {
891 struct viu_fh *fh = priv;
892
893 return videobuf_reqbufs(&fh->vb_vidq, p);
894 }
895
vidioc_querybuf(struct file * file,void * priv,struct v4l2_buffer * p)896 static int vidioc_querybuf(struct file *file, void *priv,
897 struct v4l2_buffer *p)
898 {
899 struct viu_fh *fh = priv;
900
901 return videobuf_querybuf(&fh->vb_vidq, p);
902 }
903
vidioc_qbuf(struct file * file,void * priv,struct v4l2_buffer * p)904 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
905 {
906 struct viu_fh *fh = priv;
907
908 return videobuf_qbuf(&fh->vb_vidq, p);
909 }
910
vidioc_dqbuf(struct file * file,void * priv,struct v4l2_buffer * p)911 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
912 {
913 struct viu_fh *fh = priv;
914
915 return videobuf_dqbuf(&fh->vb_vidq, p,
916 file->f_flags & O_NONBLOCK);
917 }
918
vidioc_streamon(struct file * file,void * priv,enum v4l2_buf_type i)919 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
920 {
921 struct viu_fh *fh = priv;
922 struct viu_dev *dev = fh->dev;
923
924 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
925 return -EINVAL;
926 if (fh->type != i)
927 return -EINVAL;
928
929 if (dev->ovenable)
930 dev->ovenable = 0;
931
932 viu_start_dma(fh->dev);
933
934 return videobuf_streamon(&fh->vb_vidq);
935 }
936
vidioc_streamoff(struct file * file,void * priv,enum v4l2_buf_type i)937 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
938 {
939 struct viu_fh *fh = priv;
940
941 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
942 return -EINVAL;
943 if (fh->type != i)
944 return -EINVAL;
945
946 viu_stop_dma(fh->dev);
947
948 return videobuf_streamoff(&fh->vb_vidq);
949 }
950
951 #define decoder_call(viu, o, f, args...) \
952 v4l2_subdev_call(viu->decoder, o, f, ##args)
953
vidioc_querystd(struct file * file,void * priv,v4l2_std_id * std_id)954 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
955 {
956 struct viu_fh *fh = priv;
957
958 decoder_call(fh->dev, video, querystd, std_id);
959 return 0;
960 }
961
vidioc_s_std(struct file * file,void * priv,v4l2_std_id * id)962 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *id)
963 {
964 struct viu_fh *fh = priv;
965
966 fh->dev->std = *id;
967 decoder_call(fh->dev, core, s_std, *id);
968 return 0;
969 }
970
vidioc_g_std(struct file * file,void * priv,v4l2_std_id * std_id)971 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
972 {
973 struct viu_fh *fh = priv;
974
975 *std_id = fh->dev->std;
976 return 0;
977 }
978
979 /* only one input in this driver */
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * inp)980 static int vidioc_enum_input(struct file *file, void *priv,
981 struct v4l2_input *inp)
982 {
983 struct viu_fh *fh = priv;
984
985 if (inp->index != 0)
986 return -EINVAL;
987
988 inp->type = V4L2_INPUT_TYPE_CAMERA;
989 inp->std = fh->dev->vdev->tvnorms;
990 strcpy(inp->name, "Camera");
991 return 0;
992 }
993
vidioc_g_input(struct file * file,void * priv,unsigned int * i)994 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
995 {
996 *i = 0;
997 return 0;
998 }
999
vidioc_s_input(struct file * file,void * priv,unsigned int i)1000 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1001 {
1002 struct viu_fh *fh = priv;
1003
1004 if (i > 1)
1005 return -EINVAL;
1006
1007 decoder_call(fh->dev, video, s_routing, i, 0, 0);
1008 return 0;
1009 }
1010
1011 /* Controls */
vidioc_queryctrl(struct file * file,void * priv,struct v4l2_queryctrl * qc)1012 static int vidioc_queryctrl(struct file *file, void *priv,
1013 struct v4l2_queryctrl *qc)
1014 {
1015 int i;
1016
1017 for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1018 if (qc->id && qc->id == viu_qctrl[i].id) {
1019 memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
1020 return 0;
1021 }
1022 }
1023 return -EINVAL;
1024 }
1025
vidioc_g_ctrl(struct file * file,void * priv,struct v4l2_control * ctrl)1026 static int vidioc_g_ctrl(struct file *file, void *priv,
1027 struct v4l2_control *ctrl)
1028 {
1029 int i;
1030
1031 for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1032 if (ctrl->id == viu_qctrl[i].id) {
1033 ctrl->value = qctl_regs[i];
1034 return 0;
1035 }
1036 }
1037 return -EINVAL;
1038 }
vidioc_s_ctrl(struct file * file,void * priv,struct v4l2_control * ctrl)1039 static int vidioc_s_ctrl(struct file *file, void *priv,
1040 struct v4l2_control *ctrl)
1041 {
1042 int i;
1043
1044 for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1045 if (ctrl->id == viu_qctrl[i].id) {
1046 if (ctrl->value < viu_qctrl[i].minimum
1047 || ctrl->value > viu_qctrl[i].maximum)
1048 return -ERANGE;
1049 qctl_regs[i] = ctrl->value;
1050 return 0;
1051 }
1052 }
1053 return -EINVAL;
1054 }
1055
viu_activate_next_buf(struct viu_dev * dev,struct viu_dmaqueue * viuq)1056 inline void viu_activate_next_buf(struct viu_dev *dev,
1057 struct viu_dmaqueue *viuq)
1058 {
1059 struct viu_dmaqueue *vidq = viuq;
1060 struct viu_buf *buf;
1061
1062 /* launch another DMA operation for an active/queued buffer */
1063 if (!list_empty(&vidq->active)) {
1064 buf = list_entry(vidq->active.next, struct viu_buf,
1065 vb.queue);
1066 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1067 buffer_activate(dev, buf);
1068 } else if (!list_empty(&vidq->queued)) {
1069 buf = list_entry(vidq->queued.next, struct viu_buf,
1070 vb.queue);
1071 list_del(&buf->vb.queue);
1072
1073 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1074 list_add_tail(&buf->vb.queue, &vidq->active);
1075 buf->vb.state = VIDEOBUF_ACTIVE;
1076 buffer_activate(dev, buf);
1077 }
1078 }
1079
viu_default_settings(struct viu_reg * viu_reg)1080 inline void viu_default_settings(struct viu_reg *viu_reg)
1081 {
1082 struct viu_reg *vr = viu_reg;
1083
1084 out_be32(&vr->luminance, 0x9512A254);
1085 out_be32(&vr->chroma_r, 0x03310000);
1086 out_be32(&vr->chroma_g, 0x06600F38);
1087 out_be32(&vr->chroma_b, 0x00000409);
1088 out_be32(&vr->alpha, 0x000000ff);
1089 out_be32(&vr->req_alarm, 0x00000090);
1090 dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
1091 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
1092 }
1093
viu_overlay_intr(struct viu_dev * dev,u32 status)1094 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1095 {
1096 struct viu_reg *vr = dev->vr;
1097
1098 if (status & INT_DMA_END_STATUS)
1099 dev->dma_done = 1;
1100
1101 if (status & INT_FIELD_STATUS) {
1102 if (dev->dma_done) {
1103 u32 addr = reg_val.field_base_addr;
1104
1105 dev->dma_done = 0;
1106 if (status & FIELD_NO)
1107 addr += reg_val.dma_inc;
1108
1109 out_be32(&vr->field_base_addr, addr);
1110 out_be32(&vr->dma_inc, reg_val.dma_inc);
1111 out_be32(&vr->status_cfg,
1112 (status & 0xffc0ffff) |
1113 (status & INT_ALL_STATUS) |
1114 reg_val.status_cfg);
1115 } else if (status & INT_VSYNC_STATUS) {
1116 out_be32(&vr->status_cfg,
1117 (status & 0xffc0ffff) |
1118 (status & INT_ALL_STATUS) |
1119 reg_val.status_cfg);
1120 }
1121 }
1122 }
1123
viu_capture_intr(struct viu_dev * dev,u32 status)1124 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1125 {
1126 struct viu_dmaqueue *vidq = &dev->vidq;
1127 struct viu_reg *vr = dev->vr;
1128 struct viu_buf *buf;
1129 int field_num;
1130 int need_two;
1131 int dma_done = 0;
1132
1133 field_num = status & FIELD_NO;
1134 need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1135
1136 if (status & INT_DMA_END_STATUS) {
1137 dma_done = 1;
1138 if (((field_num == 0) && (dev->field == 0)) ||
1139 (field_num && (dev->field == 1)))
1140 dev->field++;
1141 }
1142
1143 if (status & INT_FIELD_STATUS) {
1144 dprintk(1, "irq: field %d, done %d\n",
1145 !!field_num, dma_done);
1146 if (unlikely(dev->first)) {
1147 if (field_num == 0) {
1148 dev->first = 0;
1149 dprintk(1, "activate first buf\n");
1150 viu_activate_next_buf(dev, vidq);
1151 } else
1152 dprintk(1, "wait field 0\n");
1153 return;
1154 }
1155
1156 /* setup buffer address for next dma operation */
1157 if (!list_empty(&vidq->active)) {
1158 u32 addr = reg_val.field_base_addr;
1159
1160 if (field_num && need_two) {
1161 addr += reg_val.dma_inc;
1162 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1163 (unsigned long)addr, dev->field);
1164 }
1165 out_be32(&vr->field_base_addr, addr);
1166 out_be32(&vr->dma_inc, reg_val.dma_inc);
1167 out_be32(&vr->status_cfg,
1168 (status & 0xffc0ffff) |
1169 (status & INT_ALL_STATUS) |
1170 reg_val.status_cfg);
1171 return;
1172 }
1173 }
1174
1175 if (dma_done && field_num && (dev->field == 2)) {
1176 dev->field = 0;
1177 buf = list_entry(vidq->active.next,
1178 struct viu_buf, vb.queue);
1179 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1180 buf, buf->vb.i,
1181 (unsigned long)videobuf_to_dma_contig(&buf->vb),
1182 (unsigned long)in_be32(&vr->field_base_addr));
1183
1184 if (waitqueue_active(&buf->vb.done)) {
1185 list_del(&buf->vb.queue);
1186 do_gettimeofday(&buf->vb.ts);
1187 buf->vb.state = VIDEOBUF_DONE;
1188 buf->vb.field_count++;
1189 wake_up(&buf->vb.done);
1190 }
1191 /* activate next dma buffer */
1192 viu_activate_next_buf(dev, vidq);
1193 }
1194 }
1195
viu_intr(int irq,void * dev_id)1196 static irqreturn_t viu_intr(int irq, void *dev_id)
1197 {
1198 struct viu_dev *dev = (struct viu_dev *)dev_id;
1199 struct viu_reg *vr = dev->vr;
1200 u32 status;
1201 u32 error;
1202
1203 status = in_be32(&vr->status_cfg);
1204
1205 if (status & INT_ERROR_STATUS) {
1206 dev->irqs.error_irq++;
1207 error = status & ERR_MASK;
1208 if (error)
1209 dprintk(1, "Err: error(%d), times:%d!\n",
1210 error >> 4, dev->irqs.error_irq);
1211 /* Clear interrupt error bit and error flags */
1212 out_be32(&vr->status_cfg,
1213 (status & 0xffc0ffff) | INT_ERROR_STATUS);
1214 }
1215
1216 if (status & INT_DMA_END_STATUS) {
1217 dev->irqs.dma_end_irq++;
1218 dev->dma_done = 1;
1219 dprintk(2, "VIU DMA end interrupt times: %d\n",
1220 dev->irqs.dma_end_irq);
1221 }
1222
1223 if (status & INT_HSYNC_STATUS)
1224 dev->irqs.hsync_irq++;
1225
1226 if (status & INT_FIELD_STATUS) {
1227 dev->irqs.field_irq++;
1228 dprintk(2, "VIU field interrupt times: %d\n",
1229 dev->irqs.field_irq);
1230 }
1231
1232 if (status & INT_VSTART_STATUS)
1233 dev->irqs.vstart_irq++;
1234
1235 if (status & INT_VSYNC_STATUS) {
1236 dev->irqs.vsync_irq++;
1237 dprintk(2, "VIU vsync interrupt times: %d\n",
1238 dev->irqs.vsync_irq);
1239 }
1240
1241 /* clear all pending irqs */
1242 status = in_be32(&vr->status_cfg);
1243 out_be32(&vr->status_cfg,
1244 (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1245
1246 if (dev->ovenable) {
1247 viu_overlay_intr(dev, status);
1248 return IRQ_HANDLED;
1249 }
1250
1251 /* Capture mode */
1252 viu_capture_intr(dev, status);
1253 return IRQ_HANDLED;
1254 }
1255
1256 /*
1257 * File operations for the device
1258 */
viu_open(struct file * file)1259 static int viu_open(struct file *file)
1260 {
1261 struct video_device *vdev = video_devdata(file);
1262 struct viu_dev *dev = video_get_drvdata(vdev);
1263 struct viu_fh *fh;
1264 struct viu_reg *vr;
1265 int minor = vdev->minor;
1266 u32 status_cfg;
1267 int i;
1268
1269 dprintk(1, "viu: open (minor=%d)\n", minor);
1270
1271 dev->users++;
1272 if (dev->users > 1) {
1273 dev->users--;
1274 return -EBUSY;
1275 }
1276
1277 vr = dev->vr;
1278
1279 dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1280 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1281
1282 /* allocate and initialize per filehandle data */
1283 fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1284 if (!fh) {
1285 dev->users--;
1286 return -ENOMEM;
1287 }
1288
1289 file->private_data = fh;
1290 fh->dev = dev;
1291
1292 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1293 fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1294 fh->width = norm_maxw();
1295 fh->height = norm_maxh();
1296 dev->crop_current.width = fh->width;
1297 dev->crop_current.height = fh->height;
1298
1299 /* Put all controls at a sane state */
1300 for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
1301 qctl_regs[i] = viu_qctrl[i].default_value;
1302
1303 dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1304 (unsigned long)fh, (unsigned long)dev,
1305 (unsigned long)&dev->vidq);
1306 dprintk(1, "Open: list_empty queued=%d\n",
1307 list_empty(&dev->vidq.queued));
1308 dprintk(1, "Open: list_empty active=%d\n",
1309 list_empty(&dev->vidq.active));
1310
1311 viu_default_settings(vr);
1312
1313 status_cfg = in_be32(&vr->status_cfg);
1314 out_be32(&vr->status_cfg,
1315 status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1316 INT_FIELD_EN | INT_VSTART_EN |
1317 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1318
1319 status_cfg = in_be32(&vr->status_cfg);
1320 out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1321
1322 spin_lock_init(&fh->vbq_lock);
1323 videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1324 dev->dev, &fh->vbq_lock,
1325 fh->type, V4L2_FIELD_INTERLACED,
1326 sizeof(struct viu_buf), fh,
1327 &fh->dev->lock);
1328 return 0;
1329 }
1330
viu_read(struct file * file,char __user * data,size_t count,loff_t * ppos)1331 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1332 loff_t *ppos)
1333 {
1334 struct viu_fh *fh = file->private_data;
1335 struct viu_dev *dev = fh->dev;
1336 int ret = 0;
1337
1338 dprintk(2, "%s\n", __func__);
1339 if (dev->ovenable)
1340 dev->ovenable = 0;
1341
1342 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1343 viu_start_dma(dev);
1344 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1345 ppos, 0, file->f_flags & O_NONBLOCK);
1346 return ret;
1347 }
1348 return 0;
1349 }
1350
viu_poll(struct file * file,struct poll_table_struct * wait)1351 static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1352 {
1353 struct viu_fh *fh = file->private_data;
1354 struct videobuf_queue *q = &fh->vb_vidq;
1355
1356 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1357 return POLLERR;
1358
1359 return videobuf_poll_stream(file, q, wait);
1360 }
1361
viu_release(struct file * file)1362 static int viu_release(struct file *file)
1363 {
1364 struct viu_fh *fh = file->private_data;
1365 struct viu_dev *dev = fh->dev;
1366 int minor = video_devdata(file)->minor;
1367
1368 viu_stop_dma(dev);
1369 videobuf_stop(&fh->vb_vidq);
1370 videobuf_mmap_free(&fh->vb_vidq);
1371
1372 kfree(fh);
1373
1374 dev->users--;
1375 dprintk(1, "close (minor=%d, users=%d)\n",
1376 minor, dev->users);
1377 return 0;
1378 }
1379
viu_reset(struct viu_reg * reg)1380 void viu_reset(struct viu_reg *reg)
1381 {
1382 out_be32(®->status_cfg, 0);
1383 out_be32(®->luminance, 0x9512a254);
1384 out_be32(®->chroma_r, 0x03310000);
1385 out_be32(®->chroma_g, 0x06600f38);
1386 out_be32(®->chroma_b, 0x00000409);
1387 out_be32(®->field_base_addr, 0);
1388 out_be32(®->dma_inc, 0);
1389 out_be32(®->picture_count, 0x01e002d0);
1390 out_be32(®->req_alarm, 0x00000090);
1391 out_be32(®->alpha, 0x000000ff);
1392 }
1393
viu_mmap(struct file * file,struct vm_area_struct * vma)1394 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1395 {
1396 struct viu_fh *fh = file->private_data;
1397 int ret;
1398
1399 dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1400
1401 ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1402
1403 dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1404 (unsigned long)vma->vm_start,
1405 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1406 ret);
1407
1408 return ret;
1409 }
1410
1411 static struct v4l2_file_operations viu_fops = {
1412 .owner = THIS_MODULE,
1413 .open = viu_open,
1414 .release = viu_release,
1415 .read = viu_read,
1416 .poll = viu_poll,
1417 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1418 .mmap = viu_mmap,
1419 };
1420
1421 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1422 .vidioc_querycap = vidioc_querycap,
1423 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
1424 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap,
1425 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
1426 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
1427 .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1428 .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1429 .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1430 .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1431 .vidioc_overlay = vidioc_overlay,
1432 .vidioc_g_fbuf = vidioc_g_fbuf,
1433 .vidioc_s_fbuf = vidioc_s_fbuf,
1434 .vidioc_reqbufs = vidioc_reqbufs,
1435 .vidioc_querybuf = vidioc_querybuf,
1436 .vidioc_qbuf = vidioc_qbuf,
1437 .vidioc_dqbuf = vidioc_dqbuf,
1438 .vidioc_g_std = vidioc_g_std,
1439 .vidioc_s_std = vidioc_s_std,
1440 .vidioc_querystd = vidioc_querystd,
1441 .vidioc_enum_input = vidioc_enum_input,
1442 .vidioc_g_input = vidioc_g_input,
1443 .vidioc_s_input = vidioc_s_input,
1444 .vidioc_queryctrl = vidioc_queryctrl,
1445 .vidioc_g_ctrl = vidioc_g_ctrl,
1446 .vidioc_s_ctrl = vidioc_s_ctrl,
1447 .vidioc_streamon = vidioc_streamon,
1448 .vidioc_streamoff = vidioc_streamoff,
1449 };
1450
1451 static struct video_device viu_template = {
1452 .name = "FSL viu",
1453 .fops = &viu_fops,
1454 .minor = -1,
1455 .ioctl_ops = &viu_ioctl_ops,
1456 .release = video_device_release,
1457
1458 .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1459 .current_norm = V4L2_STD_NTSC_M,
1460 };
1461
viu_of_probe(struct platform_device * op)1462 static int __devinit viu_of_probe(struct platform_device *op)
1463 {
1464 struct viu_dev *viu_dev;
1465 struct video_device *vdev;
1466 struct resource r;
1467 struct viu_reg __iomem *viu_regs;
1468 struct i2c_adapter *ad;
1469 int ret, viu_irq;
1470
1471 ret = of_address_to_resource(op->dev.of_node, 0, &r);
1472 if (ret) {
1473 dev_err(&op->dev, "Can't parse device node resource\n");
1474 return -ENODEV;
1475 }
1476
1477 viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1478 if (viu_irq == NO_IRQ) {
1479 dev_err(&op->dev, "Error while mapping the irq\n");
1480 return -EINVAL;
1481 }
1482
1483 /* request mem region */
1484 if (!devm_request_mem_region(&op->dev, r.start,
1485 sizeof(struct viu_reg), DRV_NAME)) {
1486 dev_err(&op->dev, "Error while requesting mem region\n");
1487 ret = -EBUSY;
1488 goto err;
1489 }
1490
1491 /* remap registers */
1492 viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1493 if (!viu_regs) {
1494 dev_err(&op->dev, "Can't map register set\n");
1495 ret = -ENOMEM;
1496 goto err;
1497 }
1498
1499 /* Prepare our private structure */
1500 viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1501 if (!viu_dev) {
1502 dev_err(&op->dev, "Can't allocate private structure\n");
1503 ret = -ENOMEM;
1504 goto err;
1505 }
1506
1507 viu_dev->vr = viu_regs;
1508 viu_dev->irq = viu_irq;
1509 viu_dev->dev = &op->dev;
1510
1511 /* init video dma queues */
1512 INIT_LIST_HEAD(&viu_dev->vidq.active);
1513 INIT_LIST_HEAD(&viu_dev->vidq.queued);
1514
1515 snprintf(viu_dev->v4l2_dev.name,
1516 sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1517 ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1518 if (ret < 0) {
1519 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1520 goto err;
1521 }
1522
1523 ad = i2c_get_adapter(0);
1524 viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1525 "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1526
1527 viu_dev->vidq.timeout.function = viu_vid_timeout;
1528 viu_dev->vidq.timeout.data = (unsigned long)viu_dev;
1529 init_timer(&viu_dev->vidq.timeout);
1530 viu_dev->first = 1;
1531
1532 /* Allocate memory for video device */
1533 vdev = video_device_alloc();
1534 if (vdev == NULL) {
1535 ret = -ENOMEM;
1536 goto err_vdev;
1537 }
1538
1539 memcpy(vdev, &viu_template, sizeof(viu_template));
1540
1541 vdev->v4l2_dev = &viu_dev->v4l2_dev;
1542
1543 viu_dev->vdev = vdev;
1544
1545 /* initialize locks */
1546 mutex_init(&viu_dev->lock);
1547 viu_dev->vdev->lock = &viu_dev->lock;
1548 spin_lock_init(&viu_dev->slock);
1549
1550 video_set_drvdata(viu_dev->vdev, viu_dev);
1551
1552 mutex_lock(&viu_dev->lock);
1553
1554 ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1555 if (ret < 0) {
1556 video_device_release(viu_dev->vdev);
1557 goto err_vdev;
1558 }
1559
1560 /* enable VIU clock */
1561 viu_dev->clk = clk_get(&op->dev, "viu_clk");
1562 if (IS_ERR(viu_dev->clk)) {
1563 dev_err(&op->dev, "failed to find the clock module!\n");
1564 ret = -ENODEV;
1565 goto err_clk;
1566 } else {
1567 clk_enable(viu_dev->clk);
1568 }
1569
1570 /* reset VIU module */
1571 viu_reset(viu_dev->vr);
1572
1573 /* install interrupt handler */
1574 if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1575 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1576 ret = -ENODEV;
1577 goto err_irq;
1578 }
1579
1580 mutex_unlock(&viu_dev->lock);
1581
1582 dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1583 return ret;
1584
1585 err_irq:
1586 clk_disable(viu_dev->clk);
1587 clk_put(viu_dev->clk);
1588 err_clk:
1589 video_unregister_device(viu_dev->vdev);
1590 err_vdev:
1591 mutex_unlock(&viu_dev->lock);
1592 i2c_put_adapter(ad);
1593 v4l2_device_unregister(&viu_dev->v4l2_dev);
1594 err:
1595 irq_dispose_mapping(viu_irq);
1596 return ret;
1597 }
1598
viu_of_remove(struct platform_device * op)1599 static int __devexit viu_of_remove(struct platform_device *op)
1600 {
1601 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1602 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1603 struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1604 struct v4l2_subdev, list);
1605 struct i2c_client *client = v4l2_get_subdevdata(sdev);
1606
1607 free_irq(dev->irq, (void *)dev);
1608 irq_dispose_mapping(dev->irq);
1609
1610 clk_disable(dev->clk);
1611 clk_put(dev->clk);
1612
1613 video_unregister_device(dev->vdev);
1614 i2c_put_adapter(client->adapter);
1615 v4l2_device_unregister(&dev->v4l2_dev);
1616 return 0;
1617 }
1618
1619 #ifdef CONFIG_PM
viu_suspend(struct platform_device * op,pm_message_t state)1620 static int viu_suspend(struct platform_device *op, pm_message_t state)
1621 {
1622 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1623 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1624
1625 clk_disable(dev->clk);
1626 return 0;
1627 }
1628
viu_resume(struct platform_device * op)1629 static int viu_resume(struct platform_device *op)
1630 {
1631 struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1632 struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1633
1634 clk_enable(dev->clk);
1635 return 0;
1636 }
1637 #endif
1638
1639 /*
1640 * Initialization and module stuff
1641 */
1642 static struct of_device_id mpc512x_viu_of_match[] = {
1643 {
1644 .compatible = "fsl,mpc5121-viu",
1645 },
1646 {},
1647 };
1648 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1649
1650 static struct platform_driver viu_of_platform_driver = {
1651 .probe = viu_of_probe,
1652 .remove = __devexit_p(viu_of_remove),
1653 #ifdef CONFIG_PM
1654 .suspend = viu_suspend,
1655 .resume = viu_resume,
1656 #endif
1657 .driver = {
1658 .name = DRV_NAME,
1659 .owner = THIS_MODULE,
1660 .of_match_table = mpc512x_viu_of_match,
1661 },
1662 };
1663
1664 module_platform_driver(viu_of_platform_driver);
1665
1666 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1667 MODULE_AUTHOR("Hongjun Chen");
1668 MODULE_LICENSE("GPL");
1669 MODULE_VERSION(VIU_VERSION);
1670