/drivers/media/video/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_platform.h>
  25#include <linux/slab.h>
  26#include <linux/version.h>
  27#include <media/v4l2-common.h>
  28#include <media/v4l2-device.h>
  29#include <media/v4l2-ioctl.h>
  30#include <media/videobuf-dma-contig.h>
  31
  32#define DRV_NAME		"fsl_viu"
  33#define VIU_MAJOR_VERSION	0
  34#define VIU_MINOR_VERSION	5
  35#define VIU_RELEASE		0
  36#define VIU_VERSION		KERNEL_VERSION(VIU_MAJOR_VERSION, \
  37					       VIU_MINOR_VERSION, \
  38					       VIU_RELEASE)
  39
  40#define BUFFER_TIMEOUT		msecs_to_jiffies(500)  /* 0.5 seconds */
  41
  42#define	VIU_VID_MEM_LIMIT	4	/* Video memory limit, in Mb */
  43
  44/* I2C address of video decoder chip is 0x4A */
  45#define VIU_VIDEO_DECODER_ADDR	0x25
  46
  47/* supported controls */
  48static struct v4l2_queryctrl viu_qctrl[] = {
  49	{
  50		.id            = V4L2_CID_BRIGHTNESS,
  51		.type          = V4L2_CTRL_TYPE_INTEGER,
  52		.name          = "Brightness",
  53		.minimum       = 0,
  54		.maximum       = 255,
  55		.step          = 1,
  56		.default_value = 127,
  57		.flags         = 0,
  58	}, {
  59		.id            = V4L2_CID_CONTRAST,
  60		.type          = V4L2_CTRL_TYPE_INTEGER,
  61		.name          = "Contrast",
  62		.minimum       = 0,
  63		.maximum       = 255,
  64		.step          = 0x1,
  65		.default_value = 0x10,
  66		.flags         = 0,
  67	}, {
  68		.id            = V4L2_CID_SATURATION,
  69		.type          = V4L2_CTRL_TYPE_INTEGER,
  70		.name          = "Saturation",
  71		.minimum       = 0,
  72		.maximum       = 255,
  73		.step          = 0x1,
  74		.default_value = 127,
  75		.flags         = 0,
  76	}, {
  77		.id            = V4L2_CID_HUE,
  78		.type          = V4L2_CTRL_TYPE_INTEGER,
  79		.name          = "Hue",
  80		.minimum       = -128,
  81		.maximum       = 127,
  82		.step          = 0x1,
  83		.default_value = 0,
  84		.flags         = 0,
  85	}
  86};
  87
  88static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
  89
  90static int info_level;
  91
  92#define dprintk(level, fmt, arg...)					\
  93	do {								\
  94		if (level <= info_level)				\
  95			printk(KERN_DEBUG "viu: " fmt , ## arg);	\
  96	} while (0)
  97
  98/*
  99 * Basic structures
 100 */
 101struct viu_fmt {
 102	char  name[32];
 103	u32   fourcc;		/* v4l2 format id */
 104	u32   pixelformat;
 105	int   depth;
 106};
 107
 108static struct viu_fmt formats[] = {
 109	{
 110		.name		= "RGB-16 (5/B-6/G-5/R)",
 111		.fourcc		= V4L2_PIX_FMT_RGB565,
 112		.pixelformat	= V4L2_PIX_FMT_RGB565,
 113		.depth		= 16,
 114	}, {
 115		.name		= "RGB-32 (A-R-G-B)",
 116		.fourcc		= V4L2_PIX_FMT_RGB32,
 117		.pixelformat	= V4L2_PIX_FMT_RGB32,
 118		.depth		= 32,
 119	}
 120};
 121
 122struct viu_dev;
 123struct viu_buf;
 124
 125/* buffer for one video frame */
 126struct viu_buf {
 127	/* common v4l buffer stuff -- must be first */
 128	struct videobuf_buffer vb;
 129	struct viu_fmt *fmt;
 130};
 131
 132struct viu_dmaqueue {
 133	struct viu_dev		*dev;
 134	struct list_head	active;
 135	struct list_head	queued;
 136	struct timer_list	timeout;
 137};
 138
 139struct viu_status {
 140	u32 field_irq;
 141	u32 vsync_irq;
 142	u32 hsync_irq;
 143	u32 vstart_irq;
 144	u32 dma_end_irq;
 145	u32 error_irq;
 146};
 147
 148struct viu_reg {
 149	u32 status_cfg;
 150	u32 luminance;
 151	u32 chroma_r;
 152	u32 chroma_g;
 153	u32 chroma_b;
 154	u32 field_base_addr;
 155	u32 dma_inc;
 156	u32 picture_count;
 157	u32 req_alarm;
 158	u32 alpha;
 159} __attribute__ ((packed));
 160
 161struct viu_dev {
 162	struct v4l2_device	v4l2_dev;
 163	struct mutex		lock;
 164	spinlock_t		slock;
 165	int			users;
 166
 167	struct device		*dev;
 168	/* various device info */
 169	struct video_device	*vdev;
 170	struct viu_dmaqueue	vidq;
 171	enum v4l2_field		capfield;
 172	int			field;
 173	int			first;
 174	int			dma_done;
 175
 176	/* Hardware register area */
 177	struct viu_reg		*vr;
 178
 179	/* Interrupt vector */
 180	int			irq;
 181	struct viu_status	irqs;
 182
 183	/* video overlay */
 184	struct v4l2_framebuffer	ovbuf;
 185	struct viu_fmt		*ovfmt;
 186	unsigned int		ovenable;
 187	enum v4l2_field		ovfield;
 188
 189	/* crop */
 190	struct v4l2_rect	crop_current;
 191
 192	/* clock pointer */
 193	struct clk		*clk;
 194
 195	/* decoder */
 196	struct v4l2_subdev	*decoder;
 197
 198	v4l2_std_id		std;
 199};
 200
 201struct viu_fh {
 202	struct viu_dev		*dev;
 203
 204	/* video capture */
 205	struct videobuf_queue	vb_vidq;
 206	spinlock_t		vbq_lock; /* spinlock for the videobuf queue */
 207
 208	/* video overlay */
 209	struct v4l2_window	win;
 210	struct v4l2_clip	clips[1];
 211
 212	/* video capture */
 213	struct viu_fmt		*fmt;
 214	int			width, height, sizeimage;
 215	enum v4l2_buf_type	type;
 216};
 217
 218static struct viu_reg reg_val;
 219
 220/*
 221 * Macro definitions of VIU registers
 222 */
 223
 224/* STATUS_CONFIG register */
 225enum status_config {
 226	SOFT_RST		= 1 << 0,
 227
 228	ERR_MASK		= 0x0f << 4,	/* Error code mask */
 229	ERR_NO			= 0x00,		/* No error */
 230	ERR_DMA_V		= 0x01 << 4,	/* DMA in vertical active */
 231	ERR_DMA_VB		= 0x02 << 4,	/* DMA in vertical blanking */
 232	ERR_LINE_TOO_LONG	= 0x04 << 4,	/* Line too long */
 233	ERR_TOO_MANG_LINES	= 0x05 << 4,	/* Too many lines in field */
 234	ERR_LINE_TOO_SHORT	= 0x06 << 4,	/* Line too short */
 235	ERR_NOT_ENOUGH_LINE	= 0x07 << 4,	/* Not enough lines in field */
 236	ERR_FIFO_OVERFLOW	= 0x08 << 4,	/* FIFO overflow */
 237	ERR_FIFO_UNDERFLOW	= 0x09 << 4,	/* FIFO underflow */
 238	ERR_1bit_ECC		= 0x0a << 4,	/* One bit ECC error */
 239	ERR_MORE_ECC		= 0x0b << 4,	/* Two/more bits ECC error */
 240
 241	INT_FIELD_EN		= 0x01 << 8,	/* Enable field interrupt */
 242	INT_VSYNC_EN		= 0x01 << 9,	/* Enable vsync interrupt */
 243	INT_HSYNC_EN		= 0x01 << 10,	/* Enable hsync interrupt */
 244	INT_VSTART_EN		= 0x01 << 11,	/* Enable vstart interrupt */
 245	INT_DMA_END_EN		= 0x01 << 12,	/* Enable DMA end interrupt */
 246	INT_ERROR_EN		= 0x01 << 13,	/* Enable error interrupt */
 247	INT_ECC_EN		= 0x01 << 14,	/* Enable ECC interrupt */
 248
 249	INT_FIELD_STATUS	= 0x01 << 16,	/* field interrupt status */
 250	INT_VSYNC_STATUS	= 0x01 << 17,	/* vsync interrupt status */
 251	INT_HSYNC_STATUS	= 0x01 << 18,	/* hsync interrupt status */
 252	INT_VSTART_STATUS	= 0x01 << 19,	/* vstart interrupt status */
 253	INT_DMA_END_STATUS	= 0x01 << 20,	/* DMA end interrupt status */
 254	INT_ERROR_STATUS	= 0x01 << 21,	/* error interrupt status */
 255
 256	DMA_ACT			= 0x01 << 27,	/* Enable DMA transfer */
 257	FIELD_NO		= 0x01 << 28,	/* Field number */
 258	DITHER_ON		= 0x01 << 29,	/* Dithering is on */
 259	ROUND_ON		= 0x01 << 30,	/* Round is on */
 260	MODE_32BIT		= 0x01 << 31,	/* Data in RGBa888,
 261						 * 0 in RGB565
 262						 */
 263};
 264
 265#define norm_maxw()	720
 266#define norm_maxh()	576
 267
 268#define INT_ALL_STATUS	(INT_FIELD_STATUS | INT_VSYNC_STATUS | \
 269			 INT_HSYNC_STATUS | INT_VSTART_STATUS | \
 270			 INT_DMA_END_STATUS | INT_ERROR_STATUS)
 271
 272#define NUM_FORMATS	ARRAY_SIZE(formats)
 273
 274static irqreturn_t viu_intr(int irq, void *dev_id);
 275
 276struct viu_fmt *format_by_fourcc(int fourcc)
 277{
 278	int i;
 279
 280	for (i = 0; i < NUM_FORMATS; i++) {
 281		if (formats[i].pixelformat == fourcc)
 282			return formats + i;
 283	}
 284
 285	dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 286	return NULL;
 287}
 288
 289void viu_start_dma(struct viu_dev *dev)
 290{
 291	struct viu_reg *vr = dev->vr;
 292
 293	dev->field = 0;
 294
 295	/* Enable DMA operation */
 296	out_be32(&vr->status_cfg, SOFT_RST);
 297	out_be32(&vr->status_cfg, INT_FIELD_EN);
 298}
 299
 300void viu_stop_dma(struct viu_dev *dev)
 301{
 302	struct viu_reg *vr = dev->vr;
 303	int cnt = 100;
 304	u32 status_cfg;
 305
 306	out_be32(&vr->status_cfg, 0);
 307
 308	/* Clear pending interrupts */
 309	status_cfg = in_be32(&vr->status_cfg);
 310	if (status_cfg & 0x3f0000)
 311		out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 312
 313	if (status_cfg & DMA_ACT) {
 314		do {
 315			status_cfg = in_be32(&vr->status_cfg);
 316			if (status_cfg & INT_DMA_END_STATUS)
 317				break;
 318		} while (cnt--);
 319
 320		if (cnt < 0) {
 321			/* timed out, issue soft reset */
 322			out_be32(&vr->status_cfg, SOFT_RST);
 323			out_be32(&vr->status_cfg, 0);
 324		} else {
 325			/* clear DMA_END and other pending irqs */
 326			out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 327		}
 328	}
 329
 330	dev->field = 0;
 331}
 332
 333static int restart_video_queue(struct viu_dmaqueue *vidq)
 334{
 335	struct viu_buf *buf, *prev;
 336
 337	dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
 338	if (!list_empty(&vidq->active)) {
 339		buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 340		dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 341			buf, buf->vb.i);
 342
 343		viu_stop_dma(vidq->dev);
 344
 345		/* cancel all outstanding capture requests */
 346		list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
 347			list_del(&buf->vb.queue);
 348			buf->vb.state = VIDEOBUF_ERROR;
 349			wake_up(&buf->vb.done);
 350		}
 351		mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 352		return 0;
 353	}
 354
 355	prev = NULL;
 356	for (;;) {
 357		if (list_empty(&vidq->queued))
 358			return 0;
 359		buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
 360		if (prev == NULL) {
 361			list_del(&buf->vb.queue);
 362			list_add_tail(&buf->vb.queue, &vidq->active);
 363
 364			dprintk(1, "Restarting video dma\n");
 365			viu_stop_dma(vidq->dev);
 366			viu_start_dma(vidq->dev);
 367
 368			buf->vb.state = VIDEOBUF_ACTIVE;
 369			mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 370			dprintk(2, "[%p/%d] restart_queue - first active\n",
 371				buf, buf->vb.i);
 372
 373		} else if (prev->vb.width  == buf->vb.width  &&
 374			   prev->vb.height == buf->vb.height &&
 375			   prev->fmt       == buf->fmt) {
 376			list_del(&buf->vb.queue);
 377			list_add_tail(&buf->vb.queue, &vidq->active);
 378			buf->vb.state = VIDEOBUF_ACTIVE;
 379			dprintk(2, "[%p/%d] restart_queue - move to active\n",
 380				buf, buf->vb.i);
 381		} else {
 382			return 0;
 383		}
 384		prev = buf;
 385	}
 386}
 387
 388static void viu_vid_timeout(unsigned long data)
 389{
 390	struct viu_dev *dev = (struct viu_dev *)data;
 391	struct viu_buf *buf;
 392	struct viu_dmaqueue *vidq = &dev->vidq;
 393
 394	while (!list_empty(&vidq->active)) {
 395		buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 396		list_del(&buf->vb.queue);
 397		buf->vb.state = VIDEOBUF_ERROR;
 398		wake_up(&buf->vb.done);
 399		dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
 400	}
 401
 402	restart_video_queue(vidq);
 403}
 404
 405/*
 406 * Videobuf operations
 407 */
 408static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
 409			unsigned int *size)
 410{
 411	struct viu_fh *fh = vq->priv_data;
 412
 413	*size = fh->width * fh->height * fh->fmt->depth >> 3;
 414	if (*count == 0)
 415		*count = 32;
 416
 417	while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
 418		(*count)--;
 419
 420	dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
 421	return 0;
 422}
 423
 424static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
 425{
 426	struct videobuf_buffer *vb = &buf->vb;
 427	void *vaddr = NULL;
 428
 429	BUG_ON(in_interrupt());
 430
 431	videobuf_waiton(vq, &buf->vb, 0, 0);
 432
 433	if (vq->int_ops && vq->int_ops->vaddr)
 434		vaddr = vq->int_ops->vaddr(vb);
 435
 436	if (vaddr)
 437		videobuf_dma_contig_free(vq, &buf->vb);
 438
 439	buf->vb.state = VIDEOBUF_NEEDS_INIT;
 440}
 441
 442inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
 443{
 444	struct viu_reg *vr = dev->vr;
 445	int bpp;
 446
 447	/* setup the DMA base address */
 448	reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
 449
 450	dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
 451		buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
 452
 453	/* interlace is on by default, set horizontal DMA increment */
 454	reg_val.status_cfg = 0;
 455	bpp = buf->fmt->depth >> 3;
 456	switch (bpp) {
 457	case 2:
 458		reg_val.status_cfg &= ~MODE_32BIT;
 459		reg_val.dma_inc = buf->vb.width * 2;
 460		break;
 461	case 4:
 462		reg_val.status_cfg |= MODE_32BIT;
 463		reg_val.dma_inc = buf->vb.width * 4;
 464		break;
 465	default:
 466		dprintk(0, "doesn't support color depth(%d)\n",
 467			bpp * 8);
 468		return -EINVAL;
 469	}
 470
 471	/* setup picture_count register */
 472	reg_val.picture_count = (buf->vb.height / 2) << 16 |
 473				buf->vb.width;
 474
 475	reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 476
 477	buf->vb.state = VIDEOBUF_ACTIVE;
 478	dev->capfield = buf->vb.field;
 479
 480	/* reset dma increment if needed */
 481	if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
 482		reg_val.dma_inc = 0;
 483
 484	out_be32(&vr->dma_inc, reg_val.dma_inc);
 485	out_be32(&vr->picture_count, reg_val.picture_count);
 486	out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 487	mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
 488	return 0;
 489}
 490
 491static int buffer_prepare(struct videobuf_queue *vq,
 492			  struct videobuf_buffer *vb,
 493			  enum v4l2_field field)
 494{
 495	struct viu_fh  *fh  = vq->priv_data;
 496	struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
 497	int rc;
 498
 499	BUG_ON(fh->fmt == NULL);
 500
 501	if (fh->width  < 48 || fh->width  > norm_maxw() ||
 502	    fh->height < 32 || fh->height > norm_maxh())
 503		return -EINVAL;
 504	buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
 505	if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
 506		return -EINVAL;
 507
 508	if (buf->fmt       != fh->fmt	 ||
 509	    buf->vb.width  != fh->width  ||
 510	    buf->vb.height != fh->height ||
 511	    buf->vb.field  != field) {
 512		buf->fmt       = fh->fmt;
 513		buf->vb.width  = fh->width;
 514		buf->vb.height = fh->height;
 515		buf->vb.field  = field;
 516	}
 517
 518	if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
 519		rc = videobuf_iolock(vq, &buf->vb, NULL);
 520		if (rc != 0)
 521			goto fail;
 522
 523		buf->vb.width  = fh->width;
 524		buf->vb.height = fh->height;
 525		buf->vb.field  = field;
 526		buf->fmt       = fh->fmt;
 527	}
 528
 529	buf->vb.state = VIDEOBUF_PREPARED;
 530	return 0;
 531
 532fail:
 533	free_buffer(vq, buf);
 534	return rc;
 535}
 536
 537static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 538{
 539	struct viu_buf       *buf     = container_of(vb, struct viu_buf, vb);
 540	struct viu_fh        *fh      = vq->priv_data;
 541	struct viu_dev       *dev     = fh->dev;
 542	struct viu_dmaqueue  *vidq    = &dev->vidq;
 543	struct viu_buf       *prev;
 544
 545	if (!list_empty(&vidq->queued)) {
 546		dprintk(1, "adding vb queue=0x%08lx\n",
 547				(unsigned long)&buf->vb.queue);
 548		dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
 549				vidq, &vidq->queued);
 550		dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
 551			dev, &vidq->queued, vidq->queued.next,
 552			vidq->queued.prev);
 553		list_add_tail(&buf->vb.queue, &vidq->queued);
 554		buf->vb.state = VIDEOBUF_QUEUED;
 555		dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
 556			buf, buf->vb.i);
 557	} else if (list_empty(&vidq->active)) {
 558		dprintk(1, "adding vb active=0x%08lx\n",
 559				(unsigned long)&buf->vb.queue);
 560		list_add_tail(&buf->vb.queue, &vidq->active);
 561		buf->vb.state = VIDEOBUF_ACTIVE;
 562		mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 563		dprintk(2, "[%p/%d] buffer_queue - first active\n",
 564			buf, buf->vb.i);
 565
 566		buffer_activate(dev, buf);
 567	} else {
 568		dprintk(1, "adding vb queue2=0x%08lx\n",
 569				(unsigned long)&buf->vb.queue);
 570		prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
 571		if (prev->vb.width  == buf->vb.width  &&
 572		    prev->vb.height == buf->vb.height &&
 573		    prev->fmt       == buf->fmt) {
 574			list_add_tail(&buf->vb.queue, &vidq->active);
 575			buf->vb.state = VIDEOBUF_ACTIVE;
 576			dprintk(2, "[%p/%d] buffer_queue - append to active\n",
 577				buf, buf->vb.i);
 578		} else {
 579			list_add_tail(&buf->vb.queue, &vidq->queued);
 580			buf->vb.state = VIDEOBUF_QUEUED;
 581			dprintk(2, "[%p/%d] buffer_queue - first queued\n",
 582				buf, buf->vb.i);
 583		}
 584	}
 585}
 586
 587static void buffer_release(struct videobuf_queue *vq,
 588				struct videobuf_buffer *vb)
 589{
 590	struct viu_buf *buf  = container_of(vb, struct viu_buf, vb);
 591	struct viu_fh  *fh   = vq->priv_data;
 592	struct viu_dev *dev  = (struct viu_dev *)fh->dev;
 593
 594	viu_stop_dma(dev);
 595	free_buffer(vq, buf);
 596}
 597
 598static struct videobuf_queue_ops viu_video_qops = {
 599	.buf_setup      = buffer_setup,
 600	.buf_prepare    = buffer_prepare,
 601	.buf_queue      = buffer_queue,
 602	.buf_release    = buffer_release,
 603};
 604
 605/*
 606 * IOCTL vidioc handling
 607 */
 608static int vidioc_querycap(struct file *file, void *priv,
 609			   struct v4l2_capability *cap)
 610{
 611	strcpy(cap->driver, "viu");
 612	strcpy(cap->card, "viu");
 613	cap->version = VIU_VERSION;
 614	cap->capabilities =	V4L2_CAP_VIDEO_CAPTURE |
 615				V4L2_CAP_STREAMING     |
 616				V4L2_CAP_VIDEO_OVERLAY |
 617				V4L2_CAP_READWRITE;
 618	return 0;
 619}
 620
 621static int vidioc_enum_fmt(struct file *file, void  *priv,
 622					struct v4l2_fmtdesc *f)
 623{
 624	int index = f->index;
 625
 626	if (f->index > NUM_FORMATS)
 627		return -EINVAL;
 628
 629	strlcpy(f->description, formats[index].name, sizeof(f->description));
 630	f->pixelformat = formats[index].fourcc;
 631	return 0;
 632}
 633
 634static int vidioc_g_fmt_cap(struct file *file, void *priv,
 635					struct v4l2_format *f)
 636{
 637	struct viu_fh *fh = priv;
 638
 639	f->fmt.pix.width        = fh->width;
 640	f->fmt.pix.height       = fh->height;
 641	f->fmt.pix.field        = fh->vb_vidq.field;
 642	f->fmt.pix.pixelformat  = fh->fmt->pixelformat;
 643	f->fmt.pix.bytesperline =
 644			(f->fmt.pix.width * fh->fmt->depth) >> 3;
 645	f->fmt.pix.sizeimage	= fh->sizeimage;
 646	return 0;
 647}
 648
 649static int vidioc_try_fmt_cap(struct file *file, void *priv,
 650					struct v4l2_format *f)
 651{
 652	struct viu_fmt *fmt;
 653	enum v4l2_field field;
 654	unsigned int maxw, maxh;
 655
 656	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 657	if (!fmt) {
 658		dprintk(1, "Fourcc format (0x%08x) invalid.",
 659			f->fmt.pix.pixelformat);
 660		return -EINVAL;
 661	}
 662
 663	field = f->fmt.pix.field;
 664
 665	if (field == V4L2_FIELD_ANY) {
 666		field = V4L2_FIELD_INTERLACED;
 667	} else if (field != V4L2_FIELD_INTERLACED) {
 668		dprintk(1, "Field type invalid.\n");
 669		return -EINVAL;
 670	}
 671
 672	maxw  = norm_maxw();
 673	maxh  = norm_maxh();
 674
 675	f->fmt.pix.field = field;
 676	if (f->fmt.pix.height < 32)
 677		f->fmt.pix.height = 32;
 678	if (f->fmt.pix.height > maxh)
 679		f->fmt.pix.height = maxh;
 680	if (f->fmt.pix.width < 48)
 681		f->fmt.pix.width = 48;
 682	if (f->fmt.pix.width > maxw)
 683		f->fmt.pix.width = maxw;
 684	f->fmt.pix.width &= ~0x03;
 685	f->fmt.pix.bytesperline =
 686		(f->fmt.pix.width * fmt->depth) >> 3;
 687
 688	return 0;
 689}
 690
 691static int vidioc_s_fmt_cap(struct file *file, void *priv,
 692					struct v4l2_format *f)
 693{
 694	struct viu_fh *fh = priv;
 695	int ret;
 696
 697	ret = vidioc_try_fmt_cap(file, fh, f);
 698	if (ret < 0)
 699		return ret;
 700
 701	fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
 702	fh->width         = f->fmt.pix.width;
 703	fh->height        = f->fmt.pix.height;
 704	fh->sizeimage     = f->fmt.pix.sizeimage;
 705	fh->vb_vidq.field = f->fmt.pix.field;
 706	fh->type          = f->type;
 707	dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
 708	return 0;
 709}
 710
 711static int vidioc_g_fmt_overlay(struct file *file, void *priv,
 712					struct v4l2_format *f)
 713{
 714	struct viu_fh *fh = priv;
 715
 716	f->fmt.win = fh->win;
 717	return 0;
 718}
 719
 720static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
 721{
 722	enum v4l2_field field;
 723	int maxw, maxh;
 724
 725	if (dev->ovbuf.base == NULL)
 726		return -EINVAL;
 727	if (dev->ovfmt == NULL)
 728		return -EINVAL;
 729	if (win->w.width < 48 || win->w.height < 32)
 730		return -EINVAL;
 731
 732	field = win->field;
 733	maxw  = dev->crop_current.width;
 734	maxh  = dev->crop_current.height;
 735
 736	if (field == V4L2_FIELD_ANY) {
 737		field = (win->w.height > maxh/2)
 738			? V4L2_FIELD_INTERLACED
 739			: V4L2_FIELD_TOP;
 740	}
 741	switch (field) {
 742	case V4L2_FIELD_TOP:
 743	case V4L2_FIELD_BOTTOM:
 744		maxh = maxh / 2;
 745		break;
 746	case V4L2_FIELD_INTERLACED:
 747		break;
 748	default:
 749		return -EINVAL;
 750	}
 751
 752	win->field = field;
 753	if (win->w.width > maxw)
 754		win->w.width = maxw;
 755	if (win->w.height > maxh)
 756		win->w.height = maxh;
 757	return 0;
 758}
 759
 760inline void viu_activate_overlay(struct viu_reg *viu_reg)
 761{
 762	struct viu_reg *vr = viu_reg;
 763
 764	out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 765	out_be32(&vr->dma_inc, reg_val.dma_inc);
 766	out_be32(&vr->picture_count, reg_val.picture_count);
 767}
 768
 769static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
 770{
 771	int bpp;
 772
 773	dprintk(1, "%s %dx%d %s\n", __func__,
 774		fh->win.w.width, fh->win.w.height, dev->ovfmt->name);
 775
 776	reg_val.status_cfg = 0;
 777
 778	/* setup window */
 779	reg_val.picture_count = (fh->win.w.height / 2) << 16 |
 780				fh->win.w.width;
 781
 782	/* setup color depth and dma increment */
 783	bpp = dev->ovfmt->depth / 8;
 784	switch (bpp) {
 785	case 2:
 786		reg_val.status_cfg &= ~MODE_32BIT;
 787		reg_val.dma_inc = fh->win.w.width * 2;
 788		break;
 789	case 4:
 790		reg_val.status_cfg |= MODE_32BIT;
 791		reg_val.dma_inc = fh->win.w.width * 4;
 792		break;
 793	default:
 794		dprintk(0, "device doesn't support color depth(%d)\n",
 795			bpp * 8);
 796		return -EINVAL;
 797	}
 798
 799	dev->ovfield = fh->win.field;
 800	if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
 801		reg_val.dma_inc = 0;
 802
 803	reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 804
 805	/* setup the base address of the overlay buffer */
 806	reg_val.field_base_addr = (u32)dev->ovbuf.base;
 807
 808	return 0;
 809}
 810
 811static int vidioc_s_fmt_overlay(struct file *file, void *priv,
 812					struct v4l2_format *f)
 813{
 814	struct viu_fh  *fh  = priv;
 815	struct viu_dev *dev = (struct viu_dev *)fh->dev;
 816	unsigned long  flags;
 817	int err;
 818
 819	err = verify_preview(dev, &f->fmt.win);
 820	if (err)
 821		return err;
 822
 823	fh->win = f->fmt.win;
 824
 825	spin_lock_irqsave(&dev->slock, flags);
 826	viu_setup_preview(dev, fh);
 827	spin_unlock_irqrestore(&dev->slock, flags);
 828	return 0;
 829}
 830
 831static int vidioc_try_fmt_overlay(struct file *file, void *priv,
 832					struct v4l2_format *f)
 833{
 834	return 0;
 835}
 836
 837static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
 838{
 839	struct viu_fh  *fh  = priv;
 840	struct viu_dev *dev = (struct viu_dev *)fh->dev;
 841	unsigned long  flags;
 842
 843	if (on) {
 844		spin_lock_irqsave(&dev->slock, flags);
 845		viu_activate_overlay(dev->vr);
 846		dev->ovenable = 1;
 847
 848		/* start dma */
 849		viu_start_dma(dev);
 850		spin_unlock_irqrestore(&dev->slock, flags);
 851	} else {
 852		viu_stop_dma(dev);
 853		dev->ovenable = 0;
 854	}
 855
 856	return 0;
 857}
 858
 859int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 860{
 861	struct viu_fh  *fh = priv;
 862	struct viu_dev *dev = fh->dev;
 863	struct v4l2_framebuffer *fb = arg;
 864
 865	*fb = dev->ovbuf;
 866	fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 867	return 0;
 868}
 869
 870int vidioc_s_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 871{
 872	struct viu_fh  *fh = priv;
 873	struct viu_dev *dev = fh->dev;
 874	struct v4l2_framebuffer *fb = arg;
 875	struct viu_fmt *fmt;
 876
 877	if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 878		return -EPERM;
 879
 880	/* check args */
 881	fmt = format_by_fourcc(fb->fmt.pixelformat);
 882	if (fmt == NULL)
 883		return -EINVAL;
 884
 885	/* ok, accept it */
 886	dev->ovbuf = *fb;
 887	dev->ovfmt = fmt;
 888	if (dev->ovbuf.fmt.bytesperline == 0) {
 889		dev->ovbuf.fmt.bytesperline =
 890			dev->ovbuf.fmt.width * fmt->depth / 8;
 891	}
 892	return 0;
 893}
 894
 895static int vidioc_reqbufs(struct file *file, void *priv,
 896				struct v4l2_requestbuffers *p)
 897{
 898	struct viu_fh *fh = priv;
 899
 900	return videobuf_reqbufs(&fh->vb_vidq, p);
 901}
 902
 903static int vidioc_querybuf(struct file *file, void *priv,
 904					struct v4l2_buffer *p)
 905{
 906	struct viu_fh *fh = priv;
 907
 908	return videobuf_querybuf(&fh->vb_vidq, p);
 909}
 910
 911static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 912{
 913	struct viu_fh *fh = priv;
 914
 915	return videobuf_qbuf(&fh->vb_vidq, p);
 916}
 917
 918static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 919{
 920	struct viu_fh *fh = priv;
 921
 922	return videobuf_dqbuf(&fh->vb_vidq, p,
 923				file->f_flags & O_NONBLOCK);
 924}
 925
 926static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 927{
 928	struct viu_fh *fh = priv;
 929	struct viu_dev *dev = fh->dev;
 930
 931	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 932		return -EINVAL;
 933	if (fh->type != i)
 934		return -EINVAL;
 935
 936	if (dev->ovenable)
 937		dev->ovenable = 0;
 938
 939	viu_start_dma(fh->dev);
 940
 941	return videobuf_streamon(&fh->vb_vidq);
 942}
 943
 944static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 945{
 946	struct viu_fh  *fh = priv;
 947
 948	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 949		return -EINVAL;
 950	if (fh->type != i)
 951		return -EINVAL;
 952
 953	viu_stop_dma(fh->dev);
 954
 955	return videobuf_streamoff(&fh->vb_vidq);
 956}
 957
 958#define decoder_call(viu, o, f, args...) \
 959	v4l2_subdev_call(viu->decoder, o, f, ##args)
 960
 961static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 962{
 963	struct viu_fh *fh = priv;
 964
 965	decoder_call(fh->dev, video, querystd, std_id);
 966	return 0;
 967}
 968
 969static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *id)
 970{
 971	struct viu_fh *fh = priv;
 972
 973	fh->dev->std = *id;
 974	decoder_call(fh->dev, core, s_std, *id);
 975	return 0;
 976}
 977
 978static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
 979{
 980	struct viu_fh *fh = priv;
 981
 982	*std_id = fh->dev->std;
 983	return 0;
 984}
 985
 986/* only one input in this driver */
 987static int vidioc_enum_input(struct file *file, void *priv,
 988					struct v4l2_input *inp)
 989{
 990	struct viu_fh *fh = priv;
 991
 992	if (inp->index != 0)
 993		return -EINVAL;
 994
 995	inp->type = V4L2_INPUT_TYPE_CAMERA;
 996	inp->std = fh->dev->vdev->tvnorms;
 997	strcpy(inp->name, "Camera");
 998	return 0;
 999}
1000
1001static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1002{
1003	*i = 0;
1004	return 0;
1005}
1006
1007static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1008{
1009	struct viu_fh *fh = priv;
1010
1011	if (i > 1)
1012		return -EINVAL;
1013
1014	decoder_call(fh->dev, video, s_routing, i, 0, 0);
1015	return 0;
1016}
1017
1018/* Controls */
1019static int vidioc_queryctrl(struct file *file, void *priv,
1020				struct v4l2_queryctrl *qc)
1021{
1022	int i;
1023
1024	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1025		if (qc->id && qc->id == viu_qctrl[i].id) {
1026			memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
1027			return 0;
1028		}
1029	}
1030	return -EINVAL;
1031}
1032
1033static int vidioc_g_ctrl(struct file *file, void *priv,
1034				struct v4l2_control *ctrl)
1035{
1036	int i;
1037
1038	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1039		if (ctrl->id == viu_qctrl[i].id) {
1040			ctrl->value = qctl_regs[i];
1041			return 0;
1042		}
1043	}
1044	return -EINVAL;
1045}
1046static int vidioc_s_ctrl(struct file *file, void *priv,
1047				struct v4l2_control *ctrl)
1048{
1049	int i;
1050
1051	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1052		if (ctrl->id == viu_qctrl[i].id) {
1053			if (ctrl->value < viu_qctrl[i].minimum
1054				|| ctrl->value > viu_qctrl[i].maximum)
1055					return -ERANGE;
1056			qctl_regs[i] = ctrl->value;
1057			return 0;
1058		}
1059	}
1060	return -EINVAL;
1061}
1062
1063inline void viu_activate_next_buf(struct viu_dev *dev,
1064				struct viu_dmaqueue *viuq)
1065{
1066	struct viu_dmaqueue *vidq = viuq;
1067	struct viu_buf *buf;
1068
1069	/* launch another DMA operation for an active/queued buffer */
1070	if (!list_empty(&vidq->active)) {
1071		buf = list_entry(vidq->active.next, struct viu_buf,
1072					vb.queue);
1073		dprintk(1, "start another queued buffer: 0x%p\n", buf);
1074		buffer_activate(dev, buf);
1075	} else if (!list_empty(&vidq->queued)) {
1076		buf = list_entry(vidq->queued.next, struct viu_buf,
1077					vb.queue);
1078		list_del(&buf->vb.queue);
1079
1080		dprintk(1, "start another queued buffer: 0x%p\n", buf);
1081		list_add_tail(&buf->vb.queue, &vidq->active);
1082		buf->vb.state = VIDEOBUF_ACTIVE;
1083		buffer_activate(dev, buf);
1084	}
1085}
1086
1087inline void viu_default_settings(struct viu_reg *viu_reg)
1088{
1089	struct viu_reg *vr = viu_reg;
1090
1091	out_be32(&vr->luminance, 0x9512A254);
1092	out_be32(&vr->chroma_r, 0x03310000);
1093	out_be32(&vr->chroma_g, 0x06600F38);
1094	out_be32(&vr->chroma_b, 0x00000409);
1095	out_be32(&vr->alpha, 0x000000ff);
1096	out_be32(&vr->req_alarm, 0x00000090);
1097	dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
1098		in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
1099}
1100
1101static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1102{
1103	struct viu_reg *vr = dev->vr;
1104
1105	if (status & INT_DMA_END_STATUS)
1106		dev->dma_done = 1;
1107
1108	if (status & INT_FIELD_STATUS) {
1109		if (dev->dma_done) {
1110			u32 addr = reg_val.field_base_addr;
1111
1112			dev->dma_done = 0;
1113			if (status & FIELD_NO)
1114				addr += reg_val.dma_inc;
1115
1116			out_be32(&vr->field_base_addr, addr);
1117			out_be32(&vr->dma_inc, reg_val.dma_inc);
1118			out_be32(&vr->status_cfg,
1119				 (status & 0xffc0ffff) |
1120				 (status & INT_ALL_STATUS) |
1121				 reg_val.status_cfg);
1122		} else if (status & INT_VSYNC_STATUS) {
1123			out_be32(&vr->status_cfg,
1124				 (status & 0xffc0ffff) |
1125				 (status & INT_ALL_STATUS) |
1126				 reg_val.status_cfg);
1127		}
1128	}
1129}
1130
1131static void viu_capture_intr(struct viu_dev *dev, u32 status)
1132{
1133	struct viu_dmaqueue *vidq = &dev->vidq;
1134	struct viu_reg *vr = dev->vr;
1135	struct viu_buf *buf;
1136	int field_num;
1137	int need_two;
1138	int dma_done = 0;
1139
1140	field_num = status & FIELD_NO;
1141	need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1142
1143	if (status & INT_DMA_END_STATUS) {
1144		dma_done = 1;
1145		if (((field_num == 0) && (dev->field == 0)) ||
1146		    (field_num && (dev->field == 1)))
1147			dev->field++;
1148	}
1149
1150	if (status & INT_FIELD_STATUS) {
1151		dprintk(1, "irq: field %d, done %d\n",
1152			!!field_num, dma_done);
1153		if (unlikely(dev->first)) {
1154			if (field_num == 0) {
1155				dev->first = 0;
1156				dprintk(1, "activate first buf\n");
1157				viu_activate_next_buf(dev, vidq);
1158			} else
1159				dprintk(1, "wait field 0\n");
1160			return;
1161		}
1162
1163		/* setup buffer address for next dma operation */
1164		if (!list_empty(&vidq->active)) {
1165			u32 addr = reg_val.field_base_addr;
1166
1167			if (field_num && need_two) {
1168				addr += reg_val.dma_inc;
1169				dprintk(1, "field 1, 0x%lx, dev field %d\n",
1170					(unsigned long)addr, dev->field);
1171			}
1172			out_be32(&vr->field_base_addr, addr);
1173			out_be32(&vr->dma_inc, reg_val.dma_inc);
1174			out_be32(&vr->status_cfg,
1175				 (status & 0xffc0ffff) |
1176				 (status & INT_ALL_STATUS) |
1177				 reg_val.status_cfg);
1178			return;
1179		}
1180	}
1181
1182	if (dma_done && field_num && (dev->field == 2)) {
1183		dev->field = 0;
1184		buf = list_entry(vidq->active.next,
1185				 struct viu_buf, vb.queue);
1186		dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1187			buf, buf->vb.i,
1188			(unsigned long)videobuf_to_dma_contig(&buf->vb),
1189			(unsigned long)in_be32(&vr->field_base_addr));
1190
1191		if (waitqueue_active(&buf->vb.done)) {
1192			list_del(&buf->vb.queue);
1193			do_gettimeofday(&buf->vb.ts);
1194			buf->vb.state = VIDEOBUF_DONE;
1195			buf->vb.field_count++;
1196			wake_up(&buf->vb.done);
1197		}
1198		/* activate next dma buffer */
1199		viu_activate_next_buf(dev, vidq);
1200	}
1201}
1202
1203static irqreturn_t viu_intr(int irq, void *dev_id)
1204{
1205	struct viu_dev *dev  = (struct viu_dev *)dev_id;
1206	struct viu_reg *vr = dev->vr;
1207	u32 status;
1208	u32 error;
1209
1210	status = in_be32(&vr->status_cfg);
1211
1212	if (status & INT_ERROR_STATUS) {
1213		dev->irqs.error_irq++;
1214		error = status & ERR_MASK;
1215		if (error)
1216			dprintk(1, "Err: error(%d), times:%d!\n",
1217				error >> 4, dev->irqs.error_irq);
1218		/* Clear interrupt error bit and error flags */
1219		out_be32(&vr->status_cfg,
1220			 (status & 0xffc0ffff) | INT_ERROR_STATUS);
1221	}
1222
1223	if (status & INT_DMA_END_STATUS) {
1224		dev->irqs.dma_end_irq++;
1225		dev->dma_done = 1;
1226		dprintk(2, "VIU DMA end interrupt times: %d\n",
1227					dev->irqs.dma_end_irq);
1228	}
1229
1230	if (status & INT_HSYNC_STATUS)
1231		dev->irqs.hsync_irq++;
1232
1233	if (status & INT_FIELD_STATUS) {
1234		dev->irqs.field_irq++;
1235		dprintk(2, "VIU field interrupt times: %d\n",
1236					dev->irqs.field_irq);
1237	}
1238
1239	if (status & INT_VSTART_STATUS)
1240		dev->irqs.vstart_irq++;
1241
1242	if (status & INT_VSYNC_STATUS) {
1243		dev->irqs.vsync_irq++;
1244		dprintk(2, "VIU vsync interrupt times: %d\n",
1245			dev->irqs.vsync_irq);
1246	}
1247
1248	/* clear all pending irqs */
1249	status = in_be32(&vr->status_cfg);
1250	out_be32(&vr->status_cfg,
1251		 (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1252
1253	if (dev->ovenable) {
1254		viu_overlay_intr(dev, status);
1255		return IRQ_HANDLED;
1256	}
1257
1258	/* Capture mode */
1259	viu_capture_intr(dev, status);
1260	return IRQ_HANDLED;
1261}
1262
1263/*
1264 * File operations for the device
1265 */
1266static int viu_open(struct file *file)
1267{
1268	struct video_device *vdev = video_devdata(file);
1269	struct viu_dev *dev = video_get_drvdata(vdev);
1270	struct viu_fh *fh;
1271	struct viu_reg *vr;
1272	int minor = vdev->minor;
1273	u32 status_cfg;
1274	int i;
1275
1276	dprintk(1, "viu: open (minor=%d)\n", minor);
1277
1278	dev->users++;
1279	if (dev->users > 1) {
1280		dev->users--;
1281		return -EBUSY;
1282	}
1283
1284	vr = dev->vr;
1285
1286	dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1287		v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1288
1289	/* allocate and initialize per filehandle data */
1290	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1291	if (!fh) {
1292		dev->users--;
1293		return -ENOMEM;
1294	}
1295
1296	file->private_data = fh;
1297	fh->dev = dev;
1298
1299	fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1300	fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1301	fh->width    = norm_maxw();
1302	fh->height   = norm_maxh();
1303	dev->crop_current.width  = fh->width;
1304	dev->crop_current.height = fh->height;
1305
1306	/* Put all controls at a sane state */
1307	for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
1308		qctl_regs[i] = viu_qctrl[i].default_value;
1309
1310	dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1311		(unsigned long)fh, (unsigned long)dev,
1312		(unsigned long)&dev->vidq);
1313	dprintk(1, "Open: list_empty queued=%d\n",
1314		list_empty(&dev->vidq.queued));
1315	dprintk(1, "Open: list_empty active=%d\n",
1316		list_empty(&dev->vidq.active));
1317
1318	viu_default_settings(vr);
1319
1320	status_cfg = in_be32(&vr->status_cfg);
1321	out_be32(&vr->status_cfg,
1322		 status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1323				INT_FIELD_EN | INT_VSTART_EN |
1324				INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1325
1326	status_cfg = in_be32(&vr->status_cfg);
1327	out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1328
1329	spin_lock_init(&fh->vbq_lock);
1330	videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1331				       dev->dev, &fh->vbq_lock,
1332				       fh->type, V4L2_FIELD_INTERLACED,
1333				       sizeof(struct viu_buf), fh,
1334				       &fh->dev->lock);
1335	return 0;
1336}
1337
1338static 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		viu_start_dma(dev);
1351		ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1352				ppos, 0, file->f_flags & O_NONBLOCK);
1353		return ret;
1354	}
1355	return 0;
1356}
1357
1358static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1359{
1360	struct viu_fh *fh = file->private_data;
1361	struct videobuf_queue *q = &fh->vb_vidq;
1362
1363	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1364		return POLLERR;
1365
1366	return videobuf_poll_stream(file, q, wait);
1367}
1368
1369static int viu_release(struct file *file)
1370{
1371	struct viu_fh *fh = file->private_data;
1372	struct viu_dev *dev = fh->dev;
1373	int minor = video_devdata(file)->minor;
1374
1375	viu_stop_dma(dev);
1376	videobuf_stop(&fh->vb_vidq);
1377	videobuf_mmap_free(&fh->vb_vidq);
1378
1379	kfree(fh);
1380
1381	dev->users--;
1382	dprintk(1, "close (minor=%d, users=%d)\n",
1383		minor, dev->users);
1384	return 0;
1385}
1386
1387void viu_reset(struct viu_reg *reg)
1388{
1389	out_be32(&reg->status_cfg, 0);
1390	out_be32(&reg->luminance, 0x9512a254);
1391	out_be32(&reg->chroma_r, 0x03310000);
1392	out_be32(&reg->chroma_g, 0x06600f38);
1393	out_be32(&reg->chroma_b, 0x00000409);
1394	out_be32(&reg->field_base_addr, 0);
1395	out_be32(&reg->dma_inc, 0);
1396	out_be32(&reg->picture_count, 0x01e002d0);
1397	out_be32(&reg->req_alarm, 0x00000090);
1398	out_be32(&reg->alpha, 0x000000ff);
1399}
1400
1401static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1402{
1403	struct viu_fh *fh = file->private_data;
1404	int ret;
1405
1406	dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1407
1408	ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1409
1410	dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1411		(unsigned long)vma->vm_start,
1412		(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1413		ret);
1414
1415	return ret;
1416}
1417
1418static struct v4l2_file_operations viu_fops = {
1419	.owner		= THIS_MODULE,
1420	.open		= viu_open,
1421	.release	= viu_release,
1422	.read		= viu_read,
1423	.poll		= viu_poll,
1424	.unlocked_ioctl	= video_ioctl2, /* V4L2 ioctl handler */
1425	.mmap		= viu_mmap,
1426};
1427
1428static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1429	.vidioc_querycap	= vidioc_querycap,
1430	.vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
1431	.vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
1432	.vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
1433	.vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
1434	.vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1435	.vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1436	.vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1437	.vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1438	.vidioc_overlay	      = vidioc_overlay,
1439	.vidioc_g_fbuf	      = vidioc_g_fbuf,
1440	.vidioc_s_fbuf	      = vidioc_s_fbuf,
1441	.vidioc_reqbufs       = vidioc_reqbufs,
1442	.vidioc_querybuf      = vidioc_querybuf,
1443	.vidioc_qbuf          = vidioc_qbuf,
1444	.vidioc_dqbuf         = vidioc_dqbuf,
1445	.vidioc_g_std         = vidioc_g_std,
1446	.vidioc_s_std         = vidioc_s_std,
1447	.vidioc_querystd      = vidioc_querystd,
1448	.vidioc_enum_input    = vidioc_enum_input,
1449	.vidioc_g_input       = vidioc_g_input,
1450	.vidioc_s_input       = vidioc_s_input,
1451	.vidioc_queryctrl     = vidioc_queryctrl,
1452	.vidioc_g_ctrl        = vidioc_g_ctrl,
1453	.vidioc_s_ctrl        = vidioc_s_ctrl,
1454	.vidioc_streamon      = vidioc_streamon,
1455	.vidioc_streamoff     = vidioc_streamoff,
1456};
1457
1458static struct video_device viu_template = {
1459	.name		= "FSL viu",
1460	.fops		= &viu_fops,
1461	.minor		= -1,
1462	.ioctl_ops	= &viu_ioctl_ops,
1463	.release	= video_device_release,
1464
1465	.tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1466	.current_norm   = V4L2_STD_NTSC_M,
1467};
1468
1469static int __devinit viu_of_probe(struct platform_device *op)
1470{
1471	struct viu_dev *viu_dev;
1472	struct video_device *vdev;
1473	struct resource r;
1474	struct viu_reg __iomem *viu_regs;
1475	struct i2c_adapter *ad;
1476	int ret, viu_irq;
1477
1478	ret = of_address_to_resource(op->dev.of_node, 0, &r);
1479	if (ret) {
1480		dev_err(&op->dev, "Can't parse device node resource\n");
1481		return -ENODEV;
1482	}
1483
1484	viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1485	if (viu_irq == NO_IRQ) {
1486		dev_err(&op->dev, "Error while mapping the irq\n");
1487		return -EINVAL;
1488	}
1489
1490	/* request mem region */
1491	if (!devm_request_mem_region(&op->dev, r.start,
1492				     sizeof(struct viu_reg), DRV_NAME)) {
1493		dev_err(&op->dev, "Error while requesting mem region\n");
1494		ret = -EBUSY;
1495		goto err;
1496	}
1497
1498	/* remap registers */
1499	viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1500	if (!viu_regs) {
1501		dev_err(&op->dev, "Can't map register set\n");
1502		ret = -ENOMEM;
1503		goto err;
1504	}
1505
1506	/* Prepare our private structure */
1507	viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1508	if (!viu_dev) {
1509		dev_err(&op->dev, "Can't allocate private structure\n");
1510		ret = -ENOMEM;
1511		goto err;
1512	}
1513
1514	viu_dev->vr = viu_regs;
1515	viu_dev->irq = viu_irq;
1516	viu_dev->dev = &op->dev;
1517
1518	/* init video dma queues */
1519	INIT_LIST_HEAD(&viu_dev->vidq.active);
1520	INIT_LIST_HEAD(&viu_dev->vidq.queued);
1521
1522	snprintf(viu_dev->v4l2_dev.name,
1523		 sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1524	ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1525	if (ret < 0) {
1526		dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1527		goto err;
1528	}
1529
1530	ad = i2c_get_adapter(0);
1531	viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1532			"saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1533
1534	viu_dev->vidq.timeout.function = viu_vid_timeout;
1535	viu_dev->vidq.timeout.data     = (unsigned long)viu_dev;
1536	init_timer(&viu_dev->vidq.timeout);
1537	viu_dev->first = 1;
1538
1539	/* Allocate memory for video device */
1540	vdev = video_device_alloc();
1541	if (vdev == NULL) {
1542		ret = -ENOMEM;
1543		goto err_vdev;
1544	}
1545
1546	memcpy(vdev, &viu_template, sizeof(viu_template));
1547
1548	vdev->v4l2_dev = &viu_dev->v4l2_dev;
1549
1550	viu_dev->vdev = vdev;
1551
1552	/* initialize locks */
1553	mutex_init(&viu_dev->lock);
1554	viu_dev->vdev->lock = &viu_dev->lock;
1555	spin_lock_init(&viu_dev->slock);
1556
1557	video_set_drvdata(viu_dev->vdev, viu_dev);
1558
1559	mutex_lock(&viu_dev->lock);
1560
1561	ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1562	if (ret < 0) {
1563		video_device_release(viu_dev->vdev);
1564		goto err_vdev;
1565	}
1566
1567	/* enable VIU clock */
1568	viu_dev->clk = clk_get(&op->dev, "viu_clk");
1569	if (IS_ERR(viu_dev->clk)) {
1570		dev_err(&op->dev, "failed to find the clock module!\n");
1571		ret = -ENODEV;
1572		goto err_clk;
1573	} else {
1574		clk_enable(viu_dev->clk);
1575	}
1576
1577	/* reset VIU module */
1578	viu_reset(viu_dev->vr);
1579
1580	/* install interrupt handler */
1581	if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1582		dev_err(&op->dev, "Request VIU IRQ failed.\n");
1583		ret = -ENODEV;
1584		goto err_irq;
1585	}
1586
1587	mutex_unlock(&viu_dev->lock);
1588
1589	dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1590	return ret;
1591
1592err_irq:
1593	clk_disable(viu_dev->clk);
1594	clk_put(viu_dev->clk);
1595err_clk:
1596	video_unregister_device(viu_dev->vdev);
1597err_vdev:
1598	mutex_unlock(&viu_dev->lock);
1599	i2c_put_adapter(ad);
1600	v4l2_device_unregister(&viu_dev->v4l2_dev);
1601err:
1602	irq_dispose_mapping(viu_irq);
1603	return ret;
1604}
1605
1606static int __devexit viu_of_remove(struct platform_device *op)
1607{
1608	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1609	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1610	struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1611					      struct v4l2_subdev, list);
1612	struct i2c_client *client = v4l2_get_subdevdata(sdev);
1613
1614	free_irq(dev->irq, (void *)dev);
1615	irq_dispose_mapping(dev->irq);
1616
1617	clk_disable(dev->clk);
1618	clk_put(dev->clk);
1619
1620	video_unregister_device(dev->vdev);
1621	i2c_put_adapter(client->adapter);
1622	v4l2_device_unregister(&dev->v4l2_dev);
1623	return 0;
1624}
1625
1626#ifdef CONFIG_PM
1627static int viu_suspend(struct platform_device *op, pm_message_t state)
1628{
1629	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1630	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1631
1632	clk_disable(dev->clk);
1633	return 0;
1634}
1635
1636static int viu_resume(struct platform_device *op)
1637{
1638	struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1639	struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1640
1641	clk_enable(dev->clk);
1642	return 0;
1643}
1644#endif
1645
1646/*
1647 * Initialization and module stuff
1648 */
1649static struct of_device_id mpc512x_viu_of_match[] = {
1650	{
1651		.compatible = "fsl,mpc5121-viu",
1652	},
1653	{},
1654};
1655MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1656
1657static struct platform_driver viu_of_platform_driver = {
1658	.probe = viu_of_probe,
1659	.remove = __devexit_p(viu_of_remove),
1660#ifdef CONFIG_PM
1661	.suspend = viu_suspend,
1662	.resume = viu_resume,
1663#endif
1664	.driver = {
1665		.name = DRV_NAME,
1666		.owner = THIS_MODULE,
1667		.of_match_table = mpc512x_viu_of_match,
1668	},
1669};
1670
1671static int __init viu_init(void)
1672{
1673	return platform_driver_register(&viu_of_platform_driver);
1674}
1675
1676static void __exit viu_exit(void)
1677{
1678	platform_driver_unregister(&viu_of_platform_driver);
1679}
1680
1681module_init(viu_init);
1682module_exit(viu_exit);
1683
1684MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1685MODULE_AUTHOR("Hongjun Chen");
1686MODULE_LICENSE("GPL");