cx23885-video.c

trident tm5600的linux驱动

/*
 *  Driver for the Conexant CX23885 PCIe bridge
 *
 *  Copyright (c) 2007 Steven Toth <[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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kmod.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include "compat.h"
#include <linux/kthread.h>
#include <asm/div64.h>

#include "cx23885.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>

#ifdef CONFIG_VIDEO_V4L1_COMPAT
/* Include V4L1 specific functions. Should be removed soon */
#include <linux/videodev.h>
#endif

MODULE_DESCRIPTION("v4l2 driver module for cx23885 based TV cards");
MODULE_AUTHOR("Steven Toth <[e-mail]>");
MODULE_LICENSE("GPL");

/* ------------------------------------------------------------------ */

static unsigned int video_nr[] = {[0 ... (CX23885_MAXBOARDS - 1)] = UNSET };
static unsigned int vbi_nr[]   = {[0 ... (CX23885_MAXBOARDS - 1)] = UNSET };
static unsigned int radio_nr[] = {[0 ... (CX23885_MAXBOARDS - 1)] = UNSET };

module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr,   int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);

MODULE_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");

static unsigned int video_debug;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");

static unsigned int irq_debug;
module_param(irq_debug, int, 0644);
MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");

static unsigned int vid_limit = 16;
module_param(vid_limit, int, 0644);
MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");

#define dprintk(level, fmt, arg...)\
	do { if (video_debug >= level)\
		printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
	} while (0)

/* ------------------------------------------------------------------- */
/* static data                                                         */

#define FORMAT_FLAGS_PACKED       0x01

static struct cx23885_fmt formats[] = {
	{
		.name     = "8 bpp, gray",
		.fourcc   = V4L2_PIX_FMT_GREY,
#if 0
		.cxformat = ColorFormatY8,
#endif
		.depth    = 8,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "15 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_RGB555,
#if 0
		.cxformat = ColorFormatRGB15,
#endif
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "15 bpp RGB, be",
		.fourcc   = V4L2_PIX_FMT_RGB555X,
#if 0
		.cxformat = ColorFormatRGB15 | ColorFormatBSWAP,
#endif
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "16 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_RGB565,
#if 0
		.cxformat = ColorFormatRGB16,
#endif
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "16 bpp RGB, be",
		.fourcc   = V4L2_PIX_FMT_RGB565X,
#if 0
		.cxformat = ColorFormatRGB16 | ColorFormatBSWAP,
#endif
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "24 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_BGR24,
#if 0
		.cxformat = ColorFormatRGB24,
#endif
		.depth    = 24,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "32 bpp RGB, le",
		.fourcc   = V4L2_PIX_FMT_BGR32,
#if 0
		.cxformat = ColorFormatRGB32,
#endif
		.depth    = 32,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "32 bpp RGB, be",
		.fourcc   = V4L2_PIX_FMT_RGB32,
#if 0
		.cxformat = ColorFormatRGB32 | ColorFormatBSWAP |
			ColorFormatWSWAP,
#endif
		.depth    = 32,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "4:2:2, packed, YUYV",
		.fourcc   = V4L2_PIX_FMT_YUYV,
#if 0
		.cxformat = ColorFormatYUY2,
#endif
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	}, {
		.name     = "4:2:2, packed, UYVY",
		.fourcc   = V4L2_PIX_FMT_UYVY,
#if 0
		.cxformat = ColorFormatYUY2 | ColorFormatBSWAP,
#endif
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},
};

static struct cx23885_fmt *format_by_fourcc(unsigned int fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(formats); i++)
		if (formats[i].fourcc == fourcc)
			return formats+i;

	printk(KERN_ERR "%s(0x%08x) NOT FOUND\n", __func__, fourcc);
	return NULL;
}

/* ------------------------------------------------------------------- */

static const struct v4l2_queryctrl no_ctl = {
	.name  = "42",
	.flags = V4L2_CTRL_FLAG_DISABLED,
};

static struct cx23885_ctrl cx23885_ctls[] = {
	/* --- video --- */
	{
		.v = {
			.id            = V4L2_CID_BRIGHTNESS,
			.name          = "Brightness",
			.minimum       = 0x00,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x7f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 128,
		.reg                   = LUMA_CTRL,
		.mask                  = 0x00ff,
		.shift                 = 0,
	}, {
		.v = {
			.id            = V4L2_CID_CONTRAST,
			.name          = "Contrast",
			.minimum       = 0,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x3f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 0,
		.reg                   = LUMA_CTRL,
		.mask                  = 0xff00,
		.shift                 = 8,
	}, {
		.v = {
			.id            = V4L2_CID_HUE,
			.name          = "Hue",
			.minimum       = 0,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x7f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 128,
		.reg                   = CHROMA_CTRL,
		.mask                  = 0xff0000,
		.shift                 = 16,
	}, {
		/* strictly, this only describes only U saturation.
		 * V saturation is handled specially through code.
		 */
		.v = {
			.id            = V4L2_CID_SATURATION,
			.name          = "Saturation",
			.minimum       = 0,
			.maximum       = 0xff,
			.step          = 1,
			.default_value = 0x7f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.off                   = 0,
		.reg                   = CHROMA_CTRL,
		.mask                  = 0x00ff,
		.shift                 = 0,
	}, {
	/* --- audio --- */
		.v = {
			.id            = V4L2_CID_AUDIO_MUTE,
			.name          = "Mute",
			.minimum       = 0,
			.maximum       = 1,
			.default_value = 1,
			.type          = V4L2_CTRL_TYPE_BOOLEAN,
		},
		.reg                   = PATH1_CTL1,
		.mask                  = (0x1f << 24),
		.shift                 = 24,
	}, {
		.v = {
			.id            = V4L2_CID_AUDIO_VOLUME,
			.name          = "Volume",
			.minimum       = 0,
			.maximum       = 0x3f,
			.step          = 1,
			.default_value = 0x3f,
			.type          = V4L2_CTRL_TYPE_INTEGER,
		},
		.reg                   = PATH1_VOL_CTL,
		.mask                  = 0xff,
		.shift                 = 0,
	}
};
static const int CX23885_CTLS = ARRAY_SIZE(cx23885_ctls);

static const u32 cx23885_user_ctrls[] = {
	V4L2_CID_USER_CLASS,
	V4L2_CID_BRIGHTNESS,
	V4L2_CID_CONTRAST,
	V4L2_CID_SATURATION,
	V4L2_CID_HUE,
	V4L2_CID_AUDIO_VOLUME,
#if 0
	V4L2_CID_AUDIO_BALANCE,
#endif
	V4L2_CID_AUDIO_MUTE,
	0
};

static const u32 *ctrl_classes[] = {
	cx23885_user_ctrls,
	NULL
};

static void cx23885_video_wakeup(struct cx23885_dev *dev,
		 struct cx23885_dmaqueue *q, u32 count)
{
	struct cx23885_buffer *buf;
	int bc;

	for (bc = 0;; bc++) {
		if (list_empty(&q->active))
			break;
		buf = list_entry(q->active.next,
				 struct cx23885_buffer, vb.queue);

		/* count comes from the hw and is is 16bit wide --
		 * this trick handles wrap-arounds correctly for
		 * up to 32767 buffers in flight... */
		if ((s16) (count - buf->count) < 0)
			break;

		do_gettimeofday(&buf->vb.ts);
		dprintk(2, "[%p/%d] wakeup reg=%d buf=%d\n", buf, buf->vb.i,
			count, buf->count);
		buf->vb.state = VIDEOBUF_DONE;
		list_del(&buf->vb.queue);
		wake_up(&buf->vb.done);
	}
	if (list_empty(&q->active))
		del_timer(&q->timeout);
	else
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
	if (bc != 1)
		printk(KERN_ERR "%s: %d buffers handled (should be 1)\n",
			__func__, bc);
}

static int cx23885_set_tvnorm(struct cx23885_dev *dev, v4l2_std_id norm)
{
	dprintk(1, "%s(norm = 0x%08x) name: [%s]\n",
		__func__,
		(unsigned int)norm,
		v4l2_norm_to_name(norm));

	dev->tvnorm = norm;

	/* Tell the analog tuner/demods */
	cx23885_call_i2c_clients(&dev->i2c_bus[1], VIDIOC_S_STD, &norm);

	/* Tell the internal A/V decoder */
	cx23885_call_i2c_clients(&dev->i2c_bus[2], VIDIOC_S_STD, &norm);

	return 0;
}

static struct video_device *cx23885_vdev_init(struct cx23885_dev *dev,
				    struct pci_dev *pci,
				    struct video_device *template,
				    char *type)
{
	struct video_device *vfd;
	dprintk(1, "%s()\n", __func__);

	vfd = video_device_alloc();
	if (NULL == vfd)
		return NULL;
	*vfd = *template;
	vfd->minor   = -1;
	vfd->parent  = &pci->dev;
	vfd->release = video_device_release;
	snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)",
		 dev->name, type, cx23885_boards[dev->board].name);
	return vfd;
}

static int cx23885_ctrl_query(struct v4l2_queryctrl *qctrl)
{
	int i;

	if (qctrl->id < V4L2_CID_BASE ||
	    qctrl->id >= V4L2_CID_LASTP1)
		return -EINVAL;
	for (i = 0; i < CX23885_CTLS; i++)
		if (cx23885_ctls[i].v.id == qctrl->id)
			break;
	if (i == CX23885_CTLS) {
		*qctrl = no_ctl;
		return 0;
	}
	*qctrl = cx23885_ctls[i].v;
	return 0;
}

/* ------------------------------------------------------------------- */
/* resource management                                                 */

static int res_get(struct cx23885_dev *dev, struct cx23885_fh *fh,
	unsigned int bit)
{
	dprintk(1, "%s()\n", __func__);
	if (fh->resources & bit)
		/* have it already allocated */
		return 1;

	/* is it free? */
	mutex_lock(&dev->lock);
	if (dev->resources & bit) {
		/* no, someone else uses it */
		mutex_unlock(&dev->lock);
		return 0;
	}
	/* it's free, grab it */
	fh->resources  |= bit;
	dev->resources |= bit;
	dprintk(1, "res: get %d\n", bit);
	mutex_unlock(&dev->lock);
	return 1;
}

static int res_check(struct cx23885_fh *fh, unsigned int bit)
{
	return fh->resources & bit;
}

static int res_locked(struct cx23885_dev *dev, unsigned int bit)
{
	return dev->resources & bit;
}

static void res_free(struct cx23885_dev *dev, struct cx23885_fh *fh,
	unsigned int bits)
{
	BUG_ON((fh->resources & bits) != bits);
	dprintk(1, "%s()\n", __func__);

	mutex_lock(&dev->lock);
	fh->resources  &= ~bits;
	dev->resources &= ~bits;
	dprintk(1, "res: put %d\n", bits);
	mutex_unlock(&dev->lock);
}

static int cx23885_video_mux(struct cx23885_dev *dev, unsigned int input)
{
	struct v4l2_routing route;
	memset(&route, 0, sizeof(route));

	dprintk(1, "%s() video_mux: %d [vmux=%d, gpio=0x%x,0x%x,0x%x,0x%x]\n",
		__func__,
		input, INPUT(input)->vmux,
		INPUT(input)->gpio0, INPUT(input)->gpio1,
		INPUT(input)->gpio2, INPUT(input)->gpio3);
	dev->input = input;

	route.input = INPUT(input)->vmux;

	/* Tell the internal A/V decoder */
	cx23885_call_i2c_clients(&dev->i2c_bus[2],
		VIDIOC_INT_S_VIDEO_ROUTING, &route);
#if 0
	route.input = 0; /* Let the AVCore default */
	cx23885_call_i2c_clients(&dev->i2c_bus[2],
		VIDIOC_INT_S_AUDIO_ROUTING, &route);
#endif

	return 0;
}

/* ------------------------------------------------------------------ */
static int cx23885_set_scale(struct cx23885_dev *dev, unsigned int width,