path: root/drivers/media/dvb/dvb-usb/pctv452e.c

/*
 * PCTV 452e DVB driver
 *
 * Copyright (c) 2006-2008 Dominik Kuhlen <dkuhlen@gmx.net>
 *
 * TT connect S2-3650-CI Common Interface support, MAC readout
 * Copyright (C) 2008 Michael H. Schimek <mschimek@gmx.at>
 *
 * 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.
 */

/* dvb usb framework */
#define DVB_USB_LOG_PREFIX "pctv452e"
#include "dvb-usb.h"

/* Demodulator */
#include "stb0899_drv.h"
#include "stb0899_reg.h"
#include "stb0899_cfg.h"
/* Tuner */
#include "stb6100.h"
#include "stb6100_cfg.h"
/* FE Power */
#include "lnbp22.h"

#include "dvb_ca_en50221.h"
#include "ttpci-eeprom.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define ISOC_INTERFACE_ALTERNATIVE 3

#define SYNC_BYTE_OUT 0xaa
#define SYNC_BYTE_IN  0x55

/* guessed: (copied from ttusb-budget) */
#define PCTV_CMD_RESET 0x15
/* command to poll IR receiver */
#define PCTV_CMD_IR    0x1b
/* command to send I2C  */
#define PCTV_CMD_I2C   0x31

#define I2C_ADDR_STB0899 (0xd0 >> 1)
#define I2C_ADDR_STB6100 (0xc0 >> 1)
#define I2C_ADDR_LNBP22  (0x10 >> 1)
#define I2C_ADDR_24C16   (0xa0 >> 1)
#define I2C_ADDR_24C64   (0xa2 >> 1)


/* pctv452e sends us this amount of data for each issued usb-command */
#define PCTV_ANSWER_LEN 64
/* Wait up to 1000ms for device  */
#define PCTV_TIMEOUT 1000


#define PCTV_LED_GPIO   STB0899_GPIO01
#define PCTV_LED_GREEN  0x82
#define PCTV_LED_ORANGE 0x02

#define ci_dbg(format, arg...)				\
do {							\
	if (0)						\
		printk(KERN_DEBUG DVB_USB_LOG_PREFIX	\
			": " format "\n" , ## arg);	\
} while (0)

enum {
	TT3650_CMD_CI_TEST = 0x40,
	TT3650_CMD_CI_RD_CTRL,
	TT3650_CMD_CI_WR_CTRL,
	TT3650_CMD_CI_RD_ATTR,
	TT3650_CMD_CI_WR_ATTR,
	TT3650_CMD_CI_RESET,
	TT3650_CMD_CI_SET_VIDEO_PORT
};


static struct stb0899_postproc pctv45e_postproc[] = {
	{ PCTV_LED_GPIO, STB0899_GPIOPULLUP },
	{ 0, 0 }
};

/*
 * stores all private variables for communication with the PCTV452e DVB-S2
 */
struct pctv452e_state {
	struct dvb_ca_en50221 ca;
	struct mutex ca_mutex;

	u8 c;	   /* transaction counter, wraps around...  */
	u8 initialized; /* set to 1 if 0x15 has been sent */
	u16 last_rc_key;
};

static int tt3650_ci_msg(struct dvb_usb_device *d, u8 cmd, u8 *data,
			 unsigned int write_len, unsigned int read_len)
{
	struct pctv452e_state *state = (struct pctv452e_state *)d->priv;
	u8 buf[64];
	u8 id;
	unsigned int rlen;
	int ret;

	BUG_ON(NULL == data && 0 != (write_len | read_len));
	BUG_ON(write_len > 64 - 4);
	BUG_ON(read_len > 64 - 4);

	id = state->c++;

	buf[0] = SYNC_BYTE_OUT;
	buf[1] = id;
	buf[2] = cmd;
	buf[3] = write_len;

	memcpy(buf + 4, data, write_len);

	rlen = (read_len > 0) ? 64 : 0;
	ret = dvb_usb_generic_rw(d, buf, 4 + write_len,
				  buf, rlen, /* delay_ms */ 0);
	if (0 != ret)
		goto failed;

	ret = -EIO;
	if (SYNC_BYTE_IN != buf[0] || id != buf[1])
		goto failed;

	memcpy(data, buf + 4, read_len);

	return 0;

failed:
	err("CI error %d; %02X %02X %02X -> %02X %02X %02X.",
	     ret, SYNC_BYTE_OUT, id, cmd, buf[0], buf[1], buf[2]);

	return ret;
}

static int tt3650_ci_msg_locked(struct dvb_ca_en50221 *ca,
				u8 cmd, u8 *data, unsigned int write_len,
				unsigned int read_len)
{
	struct dvb_usb_device *d = (struct dvb_usb_device *)ca->data;
	struct pctv452e_state *state = (struct pctv452e_state *)d->priv;
	int ret;

	mutex_lock(&state->ca_mutex);
	ret = tt3650_ci_msg(d, cmd, data, write_len, read_len);
	mutex_unlock(&state->ca_mutex);

	return ret;
}

static