path: root/drivers/media/dvb/dvb-usb/anysee.c

/*
 * DVB USB Linux driver for Anysee E30 DVB-C & DVB-T USB2.0 receiver
 *
 * Copyright (C) 2007 Antti Palosaari <crope@iki.fi>
 *
 *    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.
 *
 * TODO:
 * - add smart card reader support for Conditional Access (CA)
 *
 * Card reader in Anysee is nothing more than ISO 7816 card reader.
 * There is no hardware CAM in any Anysee device sold.
 * In my understanding it should be implemented by making own module
 * for ISO 7816 card reader, like dvb_ca_en50221 is implemented. This
 * module registers serial interface that can be used to communicate
 * with any ISO 7816 smart card.
 *
 * Any help according to implement serial smart card reader support
 * is highly welcome!
 */

#include "anysee.h"
#include "tda1002x.h"
#include "mt352.h"
#include "mt352_priv.h"
#include "zl10353.h"
#include "tda18212.h"
#include "cx24116.h"
#include "stv0900.h"
#include "stv6110.h"
#include "isl6423.h"

/* debug */
static int dvb_usb_anysee_debug;
module_param_named(debug, dvb_usb_anysee_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level" DVB_USB_DEBUG_STATUS);
static int dvb_usb_anysee_delsys;
module_param_named(delsys, dvb_usb_anysee_delsys, int, 0644);
MODULE_PARM_DESC(delsys, "select delivery mode (0=DVB-C, 1=DVB-T)");
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static DEFINE_MUTEX(anysee_usb_mutex);

static int anysee_ctrl_msg(struct dvb_usb_device *d, u8 *sbuf, u8 slen,
	u8 *rbuf, u8 rlen)
{
	struct anysee_state *state = d->priv;
	int act_len, ret;
	u8 buf[64];

	memcpy(&buf[0], sbuf, slen);
	buf[60] = state->seq++;

	if (mutex_lock_interruptible(&anysee_usb_mutex) < 0)
		return -EAGAIN;

	/* We need receive one message more after dvb_usb_generic_rw due
	   to weird transaction flow, which is 1 x send + 2 x receive. */
	ret = dvb_usb_generic_rw(d, buf, sizeof(buf), buf, sizeof(buf), 0);

	if (!ret) {
		/* receive 2nd answer */
		ret = usb_bulk_msg(d->udev, usb_rcvbulkpipe(d->udev,
			d->props.generic_bulk_ctrl_endpoint), buf, sizeof(buf),
			&act_len, 2000);
		if (ret)
			err("%s: recv bulk message failed: %d", __func__, ret);
		else {
			deb_xfer("<<< ");
			debug_dump(buf, act_len, deb_xfer);
		}
	}

	/* read request, copy returned data to return buf */
	if (!ret && rbuf && rlen)
		memcpy(rbuf, buf, rlen);

	mutex_unlock(&anysee_usb_mutex);

	return ret;
}

static int anysee_read_reg(struct dvb_usb_device *d, u16 reg, u8 *val)
{
	u8 buf[] = {CMD_REG_READ, reg >> 8, reg & 0xff, 0x01};
	int ret;
	ret = anysee_ctrl_msg(d, buf, sizeof(buf), val, 1);
	deb_info("%s: reg:%04x val:%02x\n", __func__, reg, *val);
	return ret;
}

static int anysee_write_reg(struct dvb_usb_device *d, u16 reg, u8 val)
{
	u8 buf[] = {CMD_REG_WRITE, reg >> 8, reg & 0xff, 0x01, val};
	deb_info("%s: reg:%04x val:%02x\n", __func__, reg, val);
	return anysee_ctrl_msg(d, buf, sizeof(buf), NULL, 0);
}

/* write single register with mask */
static int anysee_wr_reg_mask(struct dvb_usb_device *d, u16 reg, u8 val,
	u8 mask)
{
	int ret;