path: root/drivers/media/video/saa7164/saa7164-core.c

/*
 *  Driver for the NXP SAA7164 PCIe bridge
 *
 *  Copyright (c) 2010 Steven Toth <stoth@kernellabs.com>
 *
 *  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 <asm/div64.h>

#include "saa7164.h"

MODULE_DESCRIPTION("Driver for NXP SAA7164 based TV cards");
MODULE_AUTHOR("Steven Toth <stoth@kernellabs.com>");
MODULE_LICENSE("GPL");

/*
  1 Basic
  2
  4 i2c
  8 api
 16 cmd
 32 bus
 */

unsigned int saa_debug;
module_param_named(debug, saa_debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages");

unsigned int encoder_buffers = SAA7164_MAX_ENCODER_BUFFERS;
module_param(encoder_buffers, int, 0644);
MODULE_PARM_DESC(encoder_buffers, "Total buffers in read queue 16-512 def:64");

unsigned int waitsecs = 10;
module_param(waitsecs, int, 0644);
MODULE_PARM_DESC(waitsecs, "timeout on firmware messages");

static unsigned int card[]  = {[0 ... (SAA7164_MAXBOARDS - 1)] = UNSET };
module_param_array(card,  int, NULL, 0444);
MODULE_PARM_DESC(card, "card type");

unsigned int print_histogram = 64;
module_param(print_histogram, int, 0644);
MODULE_PARM_DESC(print_histogram, "print histogram values once");

static unsigned int saa7164_devcount;

static DEFINE_MUTEX(devlist);
LIST_HEAD(saa7164_devlist);

#define INT_SIZE 16

static void saa7164_ts_verifier(struct saa7164_buffer *buf)
{
	struct saa7164_port *port = buf->port;
	struct saa7164_dev *dev = port->dev;
	u32 i;
	u8 tmp, cc, a;
	u8 *bufcpu = (u8 *)buf->cpu;

	port->sync_errors = 0;
	port->v_cc_errors = 0;
	port->a_cc_errors = 0;

	for (i = 0; i < buf->actual_size; i += 188) {
		if (*(bufcpu + i) != 0x47)
			port->sync_errors++;

		/* Query pid lower 8 bits */
		tmp = *(bufcpu + i + 2);
		cc = *(bufcpu + i + 3) & 0x0f;

		if (tmp == 0xf1) {
			a = ((port->last_v_cc + 1) & 0x0f);
			if (a != cc) {
				printk(KERN_ERR "video cc last = %x current = %x i = %d\n", port->last_v_cc, cc, i);
				port->v_cc_errors++;
			}

			port->last_v_cc = cc;
		} else
		if (tmp == 0xf2) {
			a = ((port->last_a_cc + 1) & 0x0f);
			if (a != cc) {
				printk(KERN_ERR "audio cc last = %x current = %x i = %d\n", port->last_a_cc, cc, i);
				port->a_cc_errors++;
			}

			port->last_a_cc = cc;
		}

	}

	if (port->v_cc_errors)
		printk(KERN_ERR "video pid cc,