cx18-ioctl.c

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/*
 *  cx18 ioctl system call
 *
 *  Derived from ivtv-ioctl.c
 *
 *  Copyright (C) 2007  Hans Verkuil <[e-mail]>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307  USA
 */

#include "cx18-driver.h"
#include "cx18-io.h"
#include "cx18-version.h"
#include "cx18-mailbox.h"
#include "cx18-i2c.h"
#include "cx18-queue.h"
#include "cx18-fileops.h"
#include "cx18-vbi.h"
#include "cx18-audio.h"
#include "cx18-video.h"
#include "cx18-streams.h"
#include "cx18-ioctl.h"
#include "cx18-gpio.h"
#include "cx18-controls.h"
#include "cx18-cards.h"
#include "cx18-av-core.h"
#include <media/tveeprom.h>
#include <media/v4l2-chip-ident.h>
#include <linux/i2c-id.h>

u16 cx18_service2vbi(int type)
{
	switch (type) {
	case V4L2_SLICED_TELETEXT_B:
		return CX18_SLICED_TYPE_TELETEXT_B;
	case V4L2_SLICED_CAPTION_525:
		return CX18_SLICED_TYPE_CAPTION_525;
	case V4L2_SLICED_WSS_625:
		return CX18_SLICED_TYPE_WSS_625;
	case V4L2_SLICED_VPS:
		return CX18_SLICED_TYPE_VPS;
	default:
		return 0;
	}
}

static int valid_service_line(int field, int line, int is_pal)
{
	return (is_pal && line >= 6 && (line != 23 || field == 0)) ||
	       (!is_pal && line >= 10 && line < 22);
}

static u16 select_service_from_set(int field, int line, u16 set, int is_pal)
{
	u16 valid_set = (is_pal ? V4L2_SLICED_VBI_625 : V4L2_SLICED_VBI_525);
	int i;

	set = set & valid_set;
	if (set == 0 || !valid_service_line(field, line, is_pal))
		return 0;
	if (!is_pal) {
		if (line == 21 && (set & V4L2_SLICED_CAPTION_525))
			return V4L2_SLICED_CAPTION_525;
	} else {
		if (line == 16 && field == 0 && (set & V4L2_SLICED_VPS))
			return V4L2_SLICED_VPS;
		if (line == 23 && field == 0 && (set & V4L2_SLICED_WSS_625))
			return V4L2_SLICED_WSS_625;
		if (line == 23)
			return 0;
	}
	for (i = 0; i < 32; i++) {
		if ((1 << i) & set)
			return 1 << i;
	}
	return 0;
}

void cx18_expand_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal)
{
	u16 set = fmt->service_set;
	int f, l;

	fmt->service_set = 0;
	for (f = 0; f < 2; f++) {
		for (l = 0; l < 24; l++)
			fmt->service_lines[f][l] = select_service_from_set(f, l, set, is_pal);
	}
}

#if 0
static int check_service_set(struct v4l2_sliced_vbi_format *fmt, int is_pal)
{
	int f, l;
	u16 set = 0;

	for (f = 0; f < 2; f++) {
		for (l = 0; l < 24; l++) {
			fmt->service_lines[f][l] = select_service_from_set(f, l, fmt->service_lines[f][l], is_pal);
			set |= fmt->service_lines[f][l];
		}
	}
	return set != 0;
}
#endif

u16 cx18_get_service_set(struct v4l2_sliced_vbi_format *fmt)
{
	int f, l;
	u16 set = 0;

	for (f = 0; f < 2; f++) {
		for (l = 0; l < 24; l++)
			set |= fmt->service_lines[f][l];
	}
	return set;
}

static int cx18_g_fmt_vid_cap(struct file *file, void *fh,
				struct v4l2_format *fmt)
{
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;
	struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;

	pixfmt->width = cx->params.width;
	pixfmt->height = cx->params.height;
	pixfmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
	pixfmt->field = V4L2_FIELD_INTERLACED;
	pixfmt->priv = 0;
	if (id->type == CX18_ENC_STREAM_TYPE_YUV) {
		pixfmt->pixelformat = V4L2_PIX_FMT_HM12;
		/* YUV size is (Y=(h*w) + UV=(h*(w/2))) */
		pixfmt->sizeimage =
			pixfmt->height * pixfmt->width +
			pixfmt->height * (pixfmt->width / 2);
		pixfmt->bytesperline = 720;
	} else {
		pixfmt->pixelformat = V4L2_PIX_FMT_MPEG;
		pixfmt->sizeimage = 128 * 1024;
		pixfmt->bytesperline = 0;
	}
	return 0;
}

static int cx18_g_fmt_vbi_cap(struct file *file, void *fh,
				struct v4l2_format *fmt)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
	struct v4l2_vbi_format *vbifmt = &fmt->fmt.vbi;

	vbifmt->sampling_rate = 27000000;
	vbifmt->offset = 248;
	vbifmt->samples_per_line = cx->vbi.raw_decoder_line_size - 4;
	vbifmt->sample_format = V4L2_PIX_FMT_GREY;
	vbifmt->start[0] = cx->vbi.start[0];
	vbifmt->start[1] = cx->vbi.start[1];
	vbifmt->count[0] = vbifmt->count[1] = cx->vbi.count;
	vbifmt->flags = 0;
	vbifmt->reserved[0] = 0;
	vbifmt->reserved[1] = 0;
	return 0;
}

static int cx18_g_fmt_sliced_vbi_cap(struct file *file, void *fh,
					struct v4l2_format *fmt)
{
#if 0
	/* Supported by the cx23418 but not yet implemented. */
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
	struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;

	vbifmt->reserved[0] = 0;
	vbifmt->reserved[1] = 0;
	vbifmt->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
	memset(vbifmt->service_lines, 0, sizeof(vbifmt->service_lines));

	cx18_av_cmd(cx, VIDIOC_G_FMT, fmt);
	vbifmt->service_set = cx18_get_service_set(vbifmt);
	return 0;
#else
	return -EINVAL;
#endif
}

static int cx18_try_fmt_vid_cap(struct file *file, void *fh,
				struct v4l2_format *fmt)
{
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;
	int w = fmt->fmt.pix.width;
	int h = fmt->fmt.pix.height;

	w = min(w, 720);
	w = max(w, 1);
	h = min(h, cx->is_50hz ? 576 : 480);
	h = max(h, 2);
	cx18_g_fmt_vid_cap(file, fh, fmt);
	fmt->fmt.pix.width = w;
	fmt->fmt.pix.height = h;
	return 0;
}

static int cx18_try_fmt_vbi_cap(struct file *file, void *fh,
				struct v4l2_format *fmt)
{
	return cx18_g_fmt_vbi_cap(file, fh, fmt);
}

static int cx18_try_fmt_sliced_vbi_cap(struct file *file, void *fh,
					struct v4l2_format *fmt)
{
#if 0
	/* Supported by the cx23418 but not yet implemented. */
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
	struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;

	vbifmt->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
	vbifmt->reserved[0] = 0;
	vbifmt->reserved[1] = 0;

	if (vbifmt->service_set)
		cx18_expand_service_set(vbifmt, cx->is_50hz);
	check_service_set(vbifmt, cx->is_50hz);
	vbifmt->service_set = cx18_get_service_set(vbifmt);
	return 0;
#else
	return -EINVAL;
#endif
}

static int cx18_s_fmt_vid_cap(struct file *file, void *fh,
				struct v4l2_format *fmt)
{
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;
	int ret;
	int w, h;

	ret = v4l2_prio_check(&cx->prio, &id->prio);
	if (ret)
		return ret;

	ret = cx18_try_fmt_vid_cap(file, fh, fmt);
	if (ret)
		return ret;
	w = fmt->fmt.pix.width;
	h = fmt->fmt.pix.height;

	if (cx->params.width == w && cx->params.height == h)
		return 0;

	if (atomic_read(&cx->ana_capturing) > 0)
		return -EBUSY;

	cx->params.width = w;
	cx->params.height = h;
	cx18_av_cmd(cx, VIDIOC_S_FMT, fmt);
	return cx18_g_fmt_vid_cap(file, fh, fmt);
}

static int cx18_s_fmt_vbi_cap(struct file *file, void *fh,
				struct v4l2_format *fmt)
{
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;
	int ret;

	ret = v4l2_prio_check(&cx->prio, &id->prio);
	if (ret)
		return ret;

	if (id->type == CX18_ENC_STREAM_TYPE_VBI &&
			cx->vbi.sliced_in->service_set &&
			atomic_read(&cx->ana_capturing) > 0)
		return -EBUSY;

	cx->vbi.sliced_in->service_set = 0;
	cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
	return cx18_g_fmt_vbi_cap(file, fh, fmt);
}

static int cx18_s_fmt_sliced_vbi_cap(struct file *file, void *fh,
					struct v4l2_format *fmt)
{
#if 0
	/* Supported by the cx23418 but not yet implemented. */
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;
	int ret;
	struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;

	ret = v4l2_prio_check(&cx->prio, &id->prio);
	if (ret)
		return ret;

	ret = cx18_try_fmt_sliced_vbi_cap(file, fh, fmt);
	if (ret)
		return ret;

	if (check_service_set(vbifmt, cx->is_50hz) == 0)
		return -EINVAL;

	if (atomic_read(&cx->ana_capturing) > 0 &&
			cx->vbi.sliced_in->service_set == 0)
		return -EBUSY;
	cx18_av_cmd(cx, VIDIOC_S_FMT, fmt);
	memcpy(cx->vbi.sliced_in, vbifmt, sizeof(*cx->vbi.sliced_in));
	return 0;
#else
	return -EINVAL;
#endif
}

static int cx18_g_chip_ident(struct file *file, void *fh,
				struct v4l2_chip_ident *chip)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	chip->ident = V4L2_IDENT_NONE;
	chip->revision = 0;
	if (chip->match_type == V4L2_CHIP_MATCH_HOST) {
		if (v4l2_chip_match_host(chip->match_type, chip->match_chip))
			chip->ident = V4L2_IDENT_CX23418;
		return 0;
	}
	if (chip->match_type == V4L2_CHIP_MATCH_I2C_DRIVER)
		return cx18_i2c_id(cx, chip->match_chip, VIDIOC_G_CHIP_IDENT,
					chip);
	if (chip->match_type == V4L2_CHIP_MATCH_I2C_ADDR)
		return cx18_call_i2c_client(cx, chip->match_chip,
						VIDIOC_G_CHIP_IDENT, chip);
	return -EINVAL;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cx18_cxc(struct cx18 *cx, unsigned int cmd, void *arg)
{
	struct v4l2_register *regs = arg;
	unsigned long flags;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (regs->reg >= CX18_MEM_OFFSET + CX18_MEM_SIZE)
		return -EINVAL;

	spin_lock_irqsave(&cx18_cards_lock, flags);
	if (cmd == VIDIOC_DBG_G_REGISTER)
		regs->val = cx18_read_enc(cx, regs->reg);
	else
		cx18_write_enc(cx, regs->val, regs->reg);
	spin_unlock_irqrestore(&cx18_cards_lock, flags);
	return 0;
}

static int cx18_g_register(struct file *file, void *fh,
				struct v4l2_register *reg)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	if (v4l2_chip_match_host(reg->match_type, reg->match_chip))
		return cx18_cxc(cx, VIDIOC_DBG_G_REGISTER, reg);
	if (reg->match_type == V4L2_CHIP_MATCH_I2C_DRIVER)
		return cx18_i2c_id(cx, reg->match_chip, VIDIOC_DBG_G_REGISTER,
					reg);
	return cx18_call_i2c_client(cx, reg->match_chip, VIDIOC_DBG_G_REGISTER,
					reg);
}

static int cx18_s_register(struct file *file, void *fh,
				struct v4l2_register *reg)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	if (v4l2_chip_match_host(reg->match_type, reg->match_chip))
		return cx18_cxc(cx, VIDIOC_DBG_S_REGISTER, reg);
	if (reg->match_type == V4L2_CHIP_MATCH_I2C_DRIVER)
		return cx18_i2c_id(cx, reg->match_chip, VIDIOC_DBG_S_REGISTER,
					reg);
	return cx18_call_i2c_client(cx, reg->match_chip, VIDIOC_DBG_S_REGISTER,
					reg);
}
#endif

static int cx18_g_priority(struct file *file, void *fh, enum v4l2_priority *p)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	*p = v4l2_prio_max(&cx->prio);
	return 0;
}

static int cx18_s_priority(struct file *file, void *fh, enum v4l2_priority prio)
{
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;

	return v4l2_prio_change(&cx->prio, &id->prio, prio);
}

static int cx18_querycap(struct file *file, void *fh,
				struct v4l2_capability *vcap)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	strlcpy(vcap->driver, CX18_DRIVER_NAME, sizeof(vcap->driver));
	strlcpy(vcap->card, cx->card_name, sizeof(vcap->card));
	snprintf(vcap->bus_info, sizeof(vcap->bus_info), "PCI:%s", pci_name(cx->dev));
	vcap->version = CX18_DRIVER_VERSION; 	    /* version */
	vcap->capabilities = cx->v4l2_cap; 	    /* capabilities */
	return 0;
}

static int cx18_enumaudio(struct file *file, void *fh, struct v4l2_audio *vin)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	return cx18_get_audio_input(cx, vin->index, vin);
}

static int cx18_g_audio(struct file *file, void *fh, struct v4l2_audio *vin)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	vin->index = cx->audio_input;
	return cx18_get_audio_input(cx, vin->index, vin);
}

static int cx18_s_audio(struct file *file, void *fh, struct v4l2_audio *vout)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	if (vout->index >= cx->nof_audio_inputs)
		return -EINVAL;
	cx->audio_input = vout->index;
	cx18_audio_set_io(cx);
	return 0;
}

static int cx18_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	/* set it to defaults from our table */
	return cx18_get_input(cx, vin->index, vin);
}

static int cx18_cropcap(struct file *file, void *fh,
			struct v4l2_cropcap *cropcap)
{
	struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;

	if (cropcap->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	cropcap->bounds.top = cropcap->bounds.left = 0;
	cropcap->bounds.width = 720;
	cropcap->bounds.height = cx->is_50hz ? 576 : 480;
	cropcap->pixelaspect.numerator = cx->is_50hz ? 59 : 10;
	cropcap->pixelaspect.denominator = cx->is_50hz ? 54 : 11;
	cropcap->defrect = cropcap->bounds;
	return 0;
}

static int cx18_s_crop(struct file *file, void *fh, struct v4l2_crop *crop)
{
	struct cx18_open_id *id = fh;
	struct cx18 *cx = id->cx;
	int ret;