Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/media/platform/fsl-viu.c

  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/videobuf-dma-contig.h>
 32 
 33 #define DRV_NAME                "fsl_viu"
 34 #define VIU_VERSION             "0.5.1"
 35 
 36 #define BUFFER_TIMEOUT          msecs_to_jiffies(500)  /* 0.5 seconds */
 37 
 38 #define VIU_VID_MEM_LIMIT       4       /* Video memory limit, in Mb */
 39 
 40 /* I2C address of video decoder chip is 0x4A */
 41 #define VIU_VIDEO_DECODER_ADDR  0x25
 42 
 43 /* supported controls */
 44 static struct v4l2_queryctrl viu_qctrl[] = {
 45         {
 46                 .id            = V4L2_CID_BRIGHTNESS,
 47                 .type          = V4L2_CTRL_TYPE_INTEGER,
 48                 .name          = "Brightness",
 49                 .minimum       = 0,
 50                 .maximum       = 255,
 51                 .step          = 1,
 52                 .default_value = 127,
 53                 .flags         = 0,
 54         }, {
 55                 .id            = V4L2_CID_CONTRAST,
 56                 .type          = V4L2_CTRL_TYPE_INTEGER,
 57                 .name          = "Contrast",
 58                 .minimum       = 0,
 59                 .maximum       = 255,
 60                 .step          = 0x1,
 61                 .default_value = 0x10,
 62                 .flags         = 0,
 63         }, {
 64                 .id            = V4L2_CID_SATURATION,
 65                 .type          = V4L2_CTRL_TYPE_INTEGER,
 66                 .name          = "Saturation",
 67                 .minimum       = 0,
 68                 .maximum       = 255,
 69                 .step          = 0x1,
 70                 .default_value = 127,
 71                 .flags         = 0,
 72         }, {
 73                 .id            = V4L2_CID_HUE,
 74                 .type          = V4L2_CTRL_TYPE_INTEGER,
 75                 .name          = "Hue",
 76                 .minimum       = -128,
 77                 .maximum       = 127,
 78                 .step          = 0x1,
 79                 .default_value = 0,
 80                 .flags         = 0,
 81         }
 82 };
 83 
 84 static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
 85 
 86 static int info_level;
 87 
 88 #define dprintk(level, fmt, arg...)                                     \
 89         do {                                                            \
 90                 if (level <= info_level)                                \
 91                         printk(KERN_DEBUG "viu: " fmt , ## arg);        \
 92         } while (0)
 93 
 94 /*
 95  * Basic structures
 96  */
 97 struct viu_fmt {
 98         char  name[32];
 99         u32   fourcc;           /* v4l2 format id */
100         u32   pixelformat;
101         int   depth;
102 };
103 
104 static struct viu_fmt formats[] = {
105         {
106                 .name           = "RGB-16 (5/B-6/G-5/R)",
107                 .fourcc         = V4L2_PIX_FMT_RGB565,
108                 .pixelformat    = V4L2_PIX_FMT_RGB565,
109                 .depth          = 16,
110         }, {
111                 .name           = "RGB-32 (A-R-G-B)",
112                 .fourcc         = V4L2_PIX_FMT_RGB32,
113                 .pixelformat    = V4L2_PIX_FMT_RGB32,
114                 .depth          = 32,
115         }
116 };
117 
118 struct viu_dev;
119 struct viu_buf;
120 
121 /* buffer for one video frame */
122 struct viu_buf {
123         /* common v4l buffer stuff -- must be first */
124         struct videobuf_buffer vb;
125         struct viu_fmt *fmt;
126 };
127 
128 struct viu_dmaqueue {
129         struct viu_dev          *dev;
130         struct list_head        active;
131         struct list_head        queued;
132         struct timer_list       timeout;
133 };
134 
135 struct viu_status {
136         u32 field_irq;
137         u32 vsync_irq;
138         u32 hsync_irq;
139         u32 vstart_irq;
140         u32 dma_end_irq;
141         u32 error_irq;
142 };
143 
144 struct viu_reg {
145         u32 status_cfg;
146         u32 luminance;
147         u32 chroma_r;
148         u32 chroma_g;
149         u32 chroma_b;
150         u32 field_base_addr;
151         u32 dma_inc;
152         u32 picture_count;
153         u32 req_alarm;
154         u32 alpha;
155 } __attribute__ ((packed));
156 
157 struct viu_dev {
158         struct v4l2_device      v4l2_dev;
159         struct mutex            lock;
160         spinlock_t              slock;
161         int                     users;
162 
163         struct device           *dev;
164         /* various device info */
165         struct video_device     *vdev;
166         struct viu_dmaqueue     vidq;
167         enum v4l2_field         capfield;
168         int                     field;
169         int                     first;
170         int                     dma_done;
171 
172         /* Hardware register area */
173         struct viu_reg          *vr;
174 
175         /* Interrupt vector */
176         int                     irq;
177         struct viu_status       irqs;
178 
179         /* video overlay */
180         struct v4l2_framebuffer ovbuf;
181         struct viu_fmt          *ovfmt;
182         unsigned int            ovenable;
183         enum v4l2_field         ovfield;
184 
185         /* crop */
186         struct v4l2_rect        crop_current;
187 
188         /* clock pointer */
189         struct clk              *clk;
190 
191         /* decoder */
192         struct v4l2_subdev      *decoder;
193 
194         v4l2_std_id             std;
195 };
196 
197 struct viu_fh {
198         struct viu_dev          *dev;
199 
200         /* video capture */
201         struct videobuf_queue   vb_vidq;
202         spinlock_t              vbq_lock; /* spinlock for the videobuf queue */
203 
204         /* video overlay */
205         struct v4l2_window      win;
206         struct v4l2_clip        clips[1];
207 
208         /* video capture */
209         struct viu_fmt          *fmt;
210         int                     width, height, sizeimage;
211         enum v4l2_buf_type      type;
212 };
213 
214 static struct viu_reg reg_val;
215 
216 /*
217  * Macro definitions of VIU registers
218  */
219 
220 /* STATUS_CONFIG register */
221 enum status_config {
222         SOFT_RST                = 1 << 0,
223 
224         ERR_MASK                = 0x0f << 4,    /* Error code mask */
225         ERR_NO                  = 0x00,         /* No error */
226         ERR_DMA_V               = 0x01 << 4,    /* DMA in vertical active */
227         ERR_DMA_VB              = 0x02 << 4,    /* DMA in vertical blanking */
228         ERR_LINE_TOO_LONG       = 0x04 << 4,    /* Line too long */
229         ERR_TOO_MANG_LINES      = 0x05 << 4,    /* Too many lines in field */
230         ERR_LINE_TOO_SHORT      = 0x06 << 4,    /* Line too short */
231         ERR_NOT_ENOUGH_LINE     = 0x07 << 4,    /* Not enough lines in field */
232         ERR_FIFO_OVERFLOW       = 0x08 << 4,    /* FIFO overflow */
233         ERR_FIFO_UNDERFLOW      = 0x09 << 4,    /* FIFO underflow */
234         ERR_1bit_ECC            = 0x0a << 4,    /* One bit ECC error */
235         ERR_MORE_ECC            = 0x0b << 4,    /* Two/more bits ECC error */
236 
237         INT_FIELD_EN            = 0x01 << 8,    /* Enable field interrupt */
238         INT_VSYNC_EN            = 0x01 << 9,    /* Enable vsync interrupt */
239         INT_HSYNC_EN            = 0x01 << 10,   /* Enable hsync interrupt */
240         INT_VSTART_EN           = 0x01 << 11,   /* Enable vstart interrupt */
241         INT_DMA_END_EN          = 0x01 << 12,   /* Enable DMA end interrupt */
242         INT_ERROR_EN            = 0x01 << 13,   /* Enable error interrupt */
243         INT_ECC_EN              = 0x01 << 14,   /* Enable ECC interrupt */
244 
245         INT_FIELD_STATUS        = 0x01 << 16,   /* field interrupt status */
246         INT_VSYNC_STATUS        = 0x01 << 17,   /* vsync interrupt status */
247         INT_HSYNC_STATUS        = 0x01 << 18,   /* hsync interrupt status */
248         INT_VSTART_STATUS       = 0x01 << 19,   /* vstart interrupt status */
249         INT_DMA_END_STATUS      = 0x01 << 20,   /* DMA end interrupt status */
250         INT_ERROR_STATUS        = 0x01 << 21,   /* error interrupt status */
251 
252         DMA_ACT                 = 0x01 << 27,   /* Enable DMA transfer */
253         FIELD_NO                = 0x01 << 28,   /* Field number */
254         DITHER_ON               = 0x01 << 29,   /* Dithering is on */
255         ROUND_ON                = 0x01 << 30,   /* Round is on */
256         MODE_32BIT              = 0x01 << 31,   /* Data in RGBa888,
257                                                  * 0 in RGB565
258                                                  */
259 };
260 
261 #define norm_maxw()     720
262 #define norm_maxh()     576
263 
264 #define INT_ALL_STATUS  (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
265                          INT_HSYNC_STATUS | INT_VSTART_STATUS | \
266                          INT_DMA_END_STATUS | INT_ERROR_STATUS)
267 
268 #define NUM_FORMATS     ARRAY_SIZE(formats)
269 
270 static irqreturn_t viu_intr(int irq, void *dev_id);
271 
272 struct viu_fmt *format_by_fourcc(int fourcc)
273 {
274         int i;
275 
276         for (i = 0; i < NUM_FORMATS; i++) {
277                 if (formats[i].pixelformat == fourcc)
278                         return formats + i;
279         }
280 
281         dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
282         return NULL;
283 }
284 
285 void viu_start_dma(struct viu_dev *dev)
286 {
287         struct viu_reg *vr = dev->vr;
288 
289         dev->field = 0;
290 
291         /* Enable DMA operation */
292         out_be32(&vr->status_cfg, SOFT_RST);
293         out_be32(&vr->status_cfg, INT_FIELD_EN);
294 }
295 
296 void viu_stop_dma(struct viu_dev *dev)
297 {
298         struct viu_reg *vr = dev->vr;
299         int cnt = 100;
300         u32 status_cfg;
301 
302         out_be32(&vr->status_cfg, 0);
303 
304         /* Clear pending interrupts */
305         status_cfg = in_be32(&vr->status_cfg);
306         if (status_cfg & 0x3f0000)
307                 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
308 
309         if (status_cfg & DMA_ACT) {
310                 do {
311                         status_cfg = in_be32(&vr->status_cfg);
312                         if (status_cfg & INT_DMA_END_STATUS)
313                                 break;
314                 } while (cnt--);
315 
316                 if (cnt < 0) {
317                         /* timed out, issue soft reset */
318                         out_be32(&vr->status_cfg, SOFT_RST);
319                         out_be32(&vr->status_cfg, 0);
320                 } else {
321                         /* clear DMA_END and other pending irqs */
322                         out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
323                 }
324         }
325 
326         dev->field = 0;
327 }
328 
329 static int restart_video_queue(struct viu_dmaqueue *vidq)
330 {
331         struct viu_buf *buf, *prev;
332 
333         dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
334         if (!list_empty(&vidq->active)) {
335                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
336                 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
337                         buf, buf->vb.i);
338 
339                 viu_stop_dma(vidq->dev);
340 
341                 /* cancel all outstanding capture requests */
342                 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
343                         list_del(&buf->vb.queue);
344                         buf->vb.state = VIDEOBUF_ERROR;
345                         wake_up(&buf->vb.done);
346                 }
347                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
348                 return 0;
349         }
350 
351         prev = NULL;
352         for (;;) {
353                 if (list_empty(&vidq->queued))
354                         return 0;
355                 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
356                 if (prev == NULL) {
357                         list_move_tail(&buf->vb.queue, &vidq->active);
358 
359                         dprintk(1, "Restarting video dma\n");
360                         viu_stop_dma(vidq->dev);
361                         viu_start_dma(vidq->dev);
362 
363                         buf->vb.state = VIDEOBUF_ACTIVE;
364                         mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
365                         dprintk(2, "[%p/%d] restart_queue - first active\n",
366                                 buf, buf->vb.i);
367 
368                 } else if (prev->vb.width  == buf->vb.width  &&
369                            prev->vb.height == buf->vb.height &&
370                            prev->fmt       == buf->fmt) {
371                         list_move_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 
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  */
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 
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 
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 
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 
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 
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  */
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
824 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
825                                         struct v4l2_format *f)
826 {
827         return 0;
828 }
829 
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 
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 
863 int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
864 {
865         struct viu_fh  *fh = priv;
866         struct viu_dev *dev = fh->dev;
867         const 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 
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 
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 
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 
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 
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 
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 
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 
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, video, s_std, id);
968         return 0;
969 }
970 
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 */
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 
994 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
995 {
996         *i = 0;
997         return 0;
998 }
999 
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 */
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 
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 }
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 
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 
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 
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 
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                         v4l2_get_timestamp(&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 
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  */
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         if (mutex_lock_interruptible(&dev->lock)) {
1283                 dev->users--;
1284                 return -ERESTARTSYS;
1285         }
1286 
1287         /* allocate and initialize per filehandle data */
1288         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1289         if (!fh) {
1290                 dev->users--;
1291                 mutex_unlock(&dev->lock);
1292                 return -ENOMEM;
1293         }
1294 
1295         file->private_data = fh;
1296         fh->dev = dev;
1297 
1298         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1299         fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1300         fh->width    = norm_maxw();
1301         fh->height   = norm_maxh();
1302         dev->crop_current.width  = fh->width;
1303         dev->crop_current.height = fh->height;
1304 
1305         /* Put all controls at a sane state */
1306         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
1307                 qctl_regs[i] = viu_qctrl[i].default_value;
1308 
1309         dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1310                 (unsigned long)fh, (unsigned long)dev,
1311                 (unsigned long)&dev->vidq);
1312         dprintk(1, "Open: list_empty queued=%d\n",
1313                 list_empty(&dev->vidq.queued));
1314         dprintk(1, "Open: list_empty active=%d\n",
1315                 list_empty(&dev->vidq.active));
1316 
1317         viu_default_settings(vr);
1318 
1319         status_cfg = in_be32(&vr->status_cfg);
1320         out_be32(&vr->status_cfg,
1321                  status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1322                                 INT_FIELD_EN | INT_VSTART_EN |
1323                                 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1324 
1325         status_cfg = in_be32(&vr->status_cfg);
1326         out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1327 
1328         spin_lock_init(&fh->vbq_lock);
1329         videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1330                                        dev->dev, &fh->vbq_lock,
1331                                        fh->type, V4L2_FIELD_INTERLACED,
1332                                        sizeof(struct viu_buf), fh,
1333                                        &fh->dev->lock);
1334         mutex_unlock(&dev->lock);
1335         return 0;
1336 }
1337 
1338 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1339                         loff_t *ppos)
1340 {
1341         struct viu_fh *fh = file->private_data;
1342         struct viu_dev *dev = fh->dev;
1343         int ret = 0;
1344 
1345         dprintk(2, "%s\n", __func__);
1346         if (dev->ovenable)
1347                 dev->ovenable = 0;
1348 
1349         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1350                 if (mutex_lock_interruptible(&dev->lock))
1351                         return -ERESTARTSYS;
1352                 viu_start_dma(dev);
1353                 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1354                                 ppos, 0, file->f_flags & O_NONBLOCK);
1355                 mutex_unlock(&dev->lock);
1356                 return ret;
1357         }
1358         return 0;
1359 }
1360 
1361 static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1362 {
1363         struct viu_fh *fh = file->private_data;
1364         struct videobuf_queue *q = &fh->vb_vidq;
1365         struct viu_dev *dev = fh->dev;
1366         unsigned int res;
1367 
1368         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1369                 return POLLERR;
1370 
1371         mutex_lock(&dev->lock);
1372         res = videobuf_poll_stream(file, q, wait);
1373         mutex_unlock(&dev->lock);
1374         return res;
1375 }
1376 
1377 static int viu_release(struct file *file)
1378 {
1379         struct viu_fh *fh = file->private_data;
1380         struct viu_dev *dev = fh->dev;
1381         int minor = video_devdata(file)->minor;
1382 
1383         mutex_lock(&dev->lock);
1384         viu_stop_dma(dev);
1385         videobuf_stop(&fh->vb_vidq);
1386         videobuf_mmap_free(&fh->vb_vidq);
1387         mutex_unlock(&dev->lock);
1388 
1389         kfree(fh);
1390 
1391         dev->users--;
1392         dprintk(1, "close (minor=%d, users=%d)\n",
1393                 minor, dev->users);
1394         return 0;
1395 }
1396 
1397 void viu_reset(struct viu_reg *reg)
1398 {
1399         out_be32(&reg->status_cfg, 0);
1400         out_be32(&reg->luminance, 0x9512a254);
1401         out_be32(&reg->chroma_r, 0x03310000);
1402         out_be32(&reg->chroma_g, 0x06600f38);
1403         out_be32(&reg->chroma_b, 0x00000409);
1404         out_be32(&reg->field_base_addr, 0);
1405         out_be32(&reg->dma_inc, 0);
1406         out_be32(&reg->picture_count, 0x01e002d0);
1407         out_be32(&reg->req_alarm, 0x00000090);
1408         out_be32(&reg->alpha, 0x000000ff);
1409 }
1410 
1411 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1412 {
1413         struct viu_fh *fh = file->private_data;
1414         struct viu_dev *dev = fh->dev;
1415         int ret;
1416 
1417         dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1418 
1419         if (mutex_lock_interruptible(&dev->lock))
1420                 return -ERESTARTSYS;
1421         ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1422         mutex_unlock(&dev->lock);
1423 
1424         dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1425                 (unsigned long)vma->vm_start,
1426                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1427                 ret);
1428 
1429         return ret;
1430 }
1431 
1432 static struct v4l2_file_operations viu_fops = {
1433         .owner          = THIS_MODULE,
1434         .open           = viu_open,
1435         .release        = viu_release,
1436         .read           = viu_read,
1437         .poll           = viu_poll,
1438         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1439         .mmap           = viu_mmap,
1440 };
1441 
1442 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1443         .vidioc_querycap        = vidioc_querycap,
1444         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
1445         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
1446         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
1447         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
1448         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1449         .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1450         .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1451         .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1452         .vidioc_overlay       = vidioc_overlay,
1453         .vidioc_g_fbuf        = vidioc_g_fbuf,
1454         .vidioc_s_fbuf        = vidioc_s_fbuf,
1455         .vidioc_reqbufs       = vidioc_reqbufs,
1456         .vidioc_querybuf      = vidioc_querybuf,
1457         .vidioc_qbuf          = vidioc_qbuf,
1458         .vidioc_dqbuf         = vidioc_dqbuf,
1459         .vidioc_g_std         = vidioc_g_std,
1460         .vidioc_s_std         = vidioc_s_std,
1461         .vidioc_querystd      = vidioc_querystd,
1462         .vidioc_enum_input    = vidioc_enum_input,
1463         .vidioc_g_input       = vidioc_g_input,
1464         .vidioc_s_input       = vidioc_s_input,
1465         .vidioc_queryctrl     = vidioc_queryctrl,
1466         .vidioc_g_ctrl        = vidioc_g_ctrl,
1467         .vidioc_s_ctrl        = vidioc_s_ctrl,
1468         .vidioc_streamon      = vidioc_streamon,
1469         .vidioc_streamoff     = vidioc_streamoff,
1470 };
1471 
1472 static struct video_device viu_template = {
1473         .name           = "FSL viu",
1474         .fops           = &viu_fops,
1475         .minor          = -1,
1476         .ioctl_ops      = &viu_ioctl_ops,
1477         .release        = video_device_release,
1478 
1479         .tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1480 };
1481 
1482 static int viu_of_probe(struct platform_device *op)
1483 {
1484         struct viu_dev *viu_dev;
1485         struct video_device *vdev;
1486         struct resource r;
1487         struct viu_reg __iomem *viu_regs;
1488         struct i2c_adapter *ad;
1489         int ret, viu_irq;
1490         struct clk *clk;
1491 
1492         ret = of_address_to_resource(op->dev.of_node, 0, &r);
1493         if (ret) {
1494                 dev_err(&op->dev, "Can't parse device node resource\n");
1495                 return -ENODEV;
1496         }
1497 
1498         viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1499         if (viu_irq == NO_IRQ) {
1500                 dev_err(&op->dev, "Error while mapping the irq\n");
1501                 return -EINVAL;
1502         }
1503 
1504         /* request mem region */
1505         if (!devm_request_mem_region(&op->dev, r.start,
1506                                      sizeof(struct viu_reg), DRV_NAME)) {
1507                 dev_err(&op->dev, "Error while requesting mem region\n");
1508                 ret = -EBUSY;
1509                 goto err;
1510         }
1511 
1512         /* remap registers */
1513         viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1514         if (!viu_regs) {
1515                 dev_err(&op->dev, "Can't map register set\n");
1516                 ret = -ENOMEM;
1517                 goto err;
1518         }
1519 
1520         /* Prepare our private structure */
1521         viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1522         if (!viu_dev) {
1523                 dev_err(&op->dev, "Can't allocate private structure\n");
1524                 ret = -ENOMEM;
1525                 goto err;
1526         }
1527 
1528         viu_dev->vr = viu_regs;
1529         viu_dev->irq = viu_irq;
1530         viu_dev->dev = &op->dev;
1531 
1532         /* init video dma queues */
1533         INIT_LIST_HEAD(&viu_dev->vidq.active);
1534         INIT_LIST_HEAD(&viu_dev->vidq.queued);
1535 
1536         snprintf(viu_dev->v4l2_dev.name,
1537                  sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1538         ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1539         if (ret < 0) {
1540                 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1541                 goto err;
1542         }
1543 
1544         ad = i2c_get_adapter(0);
1545         viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1546                         "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1547 
1548         viu_dev->vidq.timeout.function = viu_vid_timeout;
1549         viu_dev->vidq.timeout.data     = (unsigned long)viu_dev;
1550         init_timer(&viu_dev->vidq.timeout);
1551         viu_dev->std = V4L2_STD_NTSC_M;
1552         viu_dev->first = 1;
1553 
1554         /* Allocate memory for video device */
1555         vdev = video_device_alloc();
1556         if (vdev == NULL) {
1557                 ret = -ENOMEM;
1558                 goto err_vdev;
1559         }
1560 
1561         memcpy(vdev, &viu_template, sizeof(viu_template));
1562 
1563         vdev->v4l2_dev = &viu_dev->v4l2_dev;
1564 
1565         viu_dev->vdev = vdev;
1566 
1567         /* initialize locks */
1568         mutex_init(&viu_dev->lock);
1569         viu_dev->vdev->lock = &viu_dev->lock;
1570         spin_lock_init(&viu_dev->slock);
1571 
1572         video_set_drvdata(viu_dev->vdev, viu_dev);
1573 
1574         mutex_lock(&viu_dev->lock);
1575 
1576         ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1577         if (ret < 0) {
1578                 video_device_release(viu_dev->vdev);
1579                 goto err_vdev;
1580         }
1581 
1582         /* enable VIU clock */
1583         clk = devm_clk_get(&op->dev, "ipg");
1584         if (IS_ERR(clk)) {
1585                 dev_err(&op->dev, "failed to lookup the clock!\n");
1586                 ret = PTR_ERR(clk);
1587                 goto err_clk;
1588         }
1589         ret = clk_prepare_enable(clk);
1590         if (ret) {
1591                 dev_err(&op->dev, "failed to enable the clock!\n");
1592                 goto err_clk;
1593         }
1594         viu_dev->clk = clk;
1595 
1596         /* reset VIU module */
1597         viu_reset(viu_dev->vr);
1598 
1599         /* install interrupt handler */
1600         if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1601                 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1602                 ret = -ENODEV;
1603                 goto err_irq;
1604         }
1605 
1606         mutex_unlock(&viu_dev->lock);
1607 
1608         dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1609         return ret;
1610 
1611 err_irq:
1612         clk_disable_unprepare(viu_dev->clk);
1613 err_clk:
1614         video_unregister_device(viu_dev->vdev);
1615 err_vdev:
1616         mutex_unlock(&viu_dev->lock);
1617         i2c_put_adapter(ad);
1618         v4l2_device_unregister(&viu_dev->v4l2_dev);
1619 err:
1620         irq_dispose_mapping(viu_irq);
1621         return ret;
1622 }
1623 
1624 static int viu_of_remove(struct platform_device *op)
1625 {
1626         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1627         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1628         struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1629                                               struct v4l2_subdev, list);
1630         struct i2c_client *client = v4l2_get_subdevdata(sdev);
1631 
1632         free_irq(dev->irq, (void *)dev);
1633         irq_dispose_mapping(dev->irq);
1634 
1635         clk_disable_unprepare(dev->clk);
1636 
1637         video_unregister_device(dev->vdev);
1638         i2c_put_adapter(client->adapter);
1639         v4l2_device_unregister(&dev->v4l2_dev);
1640         return 0;
1641 }
1642 
1643 #ifdef CONFIG_PM
1644 static int viu_suspend(struct platform_device *op, pm_message_t state)
1645 {
1646         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1647         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1648 
1649         clk_disable(dev->clk);
1650         return 0;
1651 }
1652 
1653 static int viu_resume(struct platform_device *op)
1654 {
1655         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1656         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1657 
1658         clk_enable(dev->clk);
1659         return 0;
1660 }
1661 #endif
1662 
1663 /*
1664  * Initialization and module stuff
1665  */
1666 static struct of_device_id mpc512x_viu_of_match[] = {
1667         {
1668                 .compatible = "fsl,mpc5121-viu",
1669         },
1670         {},
1671 };
1672 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1673 
1674 static struct platform_driver viu_of_platform_driver = {
1675         .probe = viu_of_probe,
1676         .remove = viu_of_remove,
1677 #ifdef CONFIG_PM
1678         .suspend = viu_suspend,
1679         .resume = viu_resume,
1680 #endif
1681         .driver = {
1682                 .name = DRV_NAME,
1683                 .owner = THIS_MODULE,
1684                 .of_match_table = mpc512x_viu_of_match,
1685         },
1686 };
1687 
1688 module_platform_driver(viu_of_platform_driver);
1689 
1690 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1691 MODULE_AUTHOR("Hongjun Chen");
1692 MODULE_LICENSE("GPL");
1693 MODULE_VERSION(VIU_VERSION);
1694 

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