text: /*
   * FireDTV driver (formerly known as FireSAT)
   *
   * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
   * Copyright (C) 2008 Ben Backx <ben@bbackx.com>
   * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
   *
   *	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.
   */
  
  #include <linux/bug.h>
  #include <linux/crc32.h>
  #include <linux/delay.h>
  #include <linux/device.h>
  #include <linux/jiffies.h>
  #include <linux/kernel.h>
  #include <linux/moduleparam.h>
  #include <linux/mutex.h>
  #include <linux/string.h>
  #include <linux/stringify.h>
  #include <linux/wait.h>
  #include <linux/workqueue.h>
  
  #include <dvb_frontend.h>
  
  #include "firedtv.h"
  
  #define FCP_COMMAND_REGISTER		0xfffff0000b00ULL
  
  #define AVC_CTYPE_CONTROL		0x0
  #define AVC_CTYPE_STATUS		0x1
  #define AVC_CTYPE_NOTIFY		0x3
  
  #define AVC_RESPONSE_ACCEPTED		0x9
  #define AVC_RESPONSE_STABLE		0xc
  #define AVC_RESPONSE_CHANGED		0xd
  #define AVC_RESPONSE_INTERIM		0xf
  
  #define AVC_SUBUNIT_TYPE_TUNER		(0x05 << 3)
  #define AVC_SUBUNIT_TYPE_UNIT		(0x1f << 3)
  
  #define AVC_OPCODE_VENDOR		0x00
  #define AVC_OPCODE_READ_DESCRIPTOR	0x09
  #define AVC_OPCODE_DSIT			0xc8
  #define AVC_OPCODE_DSD			0xcb
  
  #define DESCRIPTOR_TUNER_STATUS 	0x80
  #define DESCRIPTOR_SUBUNIT_IDENTIFIER	0x00
  
  #define SFE_VENDOR_DE_COMPANYID_0	0x00 /* OUI of Digital Everywhere */
  #define SFE_VENDOR_DE_COMPANYID_1	0x12
  #define SFE_VENDOR_DE_COMPANYID_2	0x87
  
  #define SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL 0x0a
  #define SFE_VENDOR_OPCODE_LNB_CONTROL		0x52
  #define SFE_VENDOR_OPCODE_TUNE_QPSK		0x58 /* for DVB-S */
  
  #define SFE_VENDOR_OPCODE_GET_FIRMWARE_VERSION	0x00
  #define SFE_VENDOR_OPCODE_HOST2CA		0x56
  #define SFE_VENDOR_OPCODE_CA2HOST		0x57
  #define SFE_VENDOR_OPCODE_CISTATUS		0x59
  #define SFE_VENDOR_OPCODE_TUNE_QPSK2		0x60 /* for DVB-S2 */
  
  #define SFE_VENDOR_TAG_CA_RESET			0x00
  #define SFE_VENDOR_TAG_CA_APPLICATION_INFO	0x01
  #define SFE_VENDOR_TAG_CA_PMT			0x02
  #define SFE_VENDOR_TAG_CA_DATE_TIME		0x04
  #define SFE_VENDOR_TAG_CA_MMI			0x05
  #define SFE_VENDOR_TAG_CA_ENTER_MENU		0x07
  
  #define EN50221_LIST_MANAGEMENT_ONLY	0x03
  #define EN50221_TAG_APP_INFO		0x9f8021
  #define EN50221_TAG_CA_INFO		0x9f8031
  
  struct avc_command_frame {
  	u8 ctype;
  	u8 subunit;
  	u8 opcode;
  	u8 operand[509];
  };
  
  struct avc_response_frame {
  	u8 response;
  	u8 subunit;
  	u8 opcode;
  	u8 operand[509];
  };
  
  #define LAST_OPERAND (509 - 1)
  
  static inline void clear_operands(struct avc_command_frame *c, int from, int to)
  {
  	memset(&c->operand[from], 0, to - from + 1);
  }
  
  static void pad_operands(struct avc_command_frame *c, int from)
  {
  	int to = ALIGN(from, 4);
  
  	if (from <= to && to <= LAST_OPERAND)
  		clear_operands(c, from, to);
  }
  
  #define AVC_DEBUG_READ_DESCRIPTOR              0x0001
  #define AVC_DEBUG_DSIT                         0x0002
  #define AVC_DEBUG_DSD                          0x0004
  #define AVC_DEBUG_REGISTER_REMOTE_CONTROL      0x0008
  #define AVC_DEBUG_LNB_CONTROL                  0x0010
  #define AVC_DEBUG_TUNE_QPSK                    0x0020
  #define AVC_DEBUG_TUNE_QPSK2                   0x0040
  #define AVC_DEBUG_HOST2CA                      0x0080
  #define AVC_DEBUG_CA2HOST                      0x0100
  #define AVC_DEBUG_APPLICATION_PMT              0x4000
  #define AVC_DEBUG_FCP_PAYLOADS                 0x8000
  
  static int avc_debug;
  module_param_named(debug, avc_debug, int, 0644);
  MODULE_PARM_DESC(debug, "Verbose logging (none = 0"
  	", FCP subactions"
  	": READ DESCRIPTOR = "		__stringify(AVC_DEBUG_READ_DESCRIPTOR)
  	", DSIT = "			__stringify(AVC_DEBUG_DSIT)
  	", REGISTER_REMOTE_CONTROL = "	__stringify(AVC_DEBUG_REGISTER_REMOTE_CONTROL)
  	", LNB CONTROL = "		__stringify(AVC_DEBUG_LNB_CONTROL)
  	", TUNE QPSK = "		__stringify(AVC_DEBUG_TUNE_QPSK)
  	", TUNE QPSK2 = "		__stringify(AVC_DEBUG_TUNE_QPSK2)
  	", HOST2CA = "			__stringify(AVC_DEBUG_HOST2CA)
  	", CA2HOST = "			__stringify(AVC_DEBUG_CA2HOST)
  	"; Application sent PMT = "	__stringify(AVC_DEBUG_APPLICATION_PMT)
  	", FCP payloads = "		__stringify(AVC_DEBUG_FCP_PAYLOADS)
  	", or a combination, or all = -1)");
  
  /*
   * This is a workaround since there is no vendor specific command to retrieve
   * ca_info using AVC. If this parameter is not used, ca_system_id will be
   * filled with application_manufacturer from ca_app_info.
   * Digital Everywhere have said that adding ca_info is on their TODO list.
   */
  static unsigned int num_fake_ca_system_ids;
  static int fake_ca_system_ids[4] = { -1, -1, -1, -1 };
  module_param_array(fake_ca_system_ids, int, &num_fake_ca_system_ids, 0644);
  MODULE_PARM_DESC(fake_ca_system_ids, "If your CAM application manufacturer "
  		 "does not have the same ca_system_id as your CAS, you can "
  		 "override what ca_system_ids are presented to the "
  		 "application by setting this field to an array of ids.");
  
  static const char *debug_fcp_ctype(unsigned int ctype)
  {
  	static const char *ctypes[] = {
  		[0x0] = "CONTROL",		[0x1] = "STATUS",
  		[0x2] = "SPECIFIC INQUIRY",	[0x3] = "NOTIFY",
  		[0x4] = "GENERAL INQUIRY",	[0x8] = "NOT IMPLEMENTED",
  		[0x9] = "ACCEPTED",		[0xa] = "REJECTED",
  		[0xb] = "IN TRANSITION",	[0xc] = "IMPLEMENTED/STABLE",
  		[0xd] = "CHANGED",		[0xf] = "INTERIM",
  	};
  	const char *ret = ctype < ARRAY_SIZE(ctypes) ? ctypes[ctype] : NULL;
  
  	return ret ? ret : "?";
  }
  
  static const char *debug_fcp_opcode(unsigned int opcode,
  				    const u8 *data, int length)
  {
  	switch (opcode) {
  	case AVC_OPCODE_VENDOR:
  		break;
  	case AVC_OPCODE_READ_DESCRIPTOR:
  		return avc_debug & AVC_DEBUG_READ_DESCRIPTOR ?
  				"ReadDescriptor" : NULL;
  	case AVC_OPCODE_DSIT:
  		return avc_debug & AVC_DEBUG_DSIT ?
  				"DirectSelectInfo.Type" : NULL;
  	case AVC_OPCODE_DSD:
  		return avc_debug & AVC_DEBUG_DSD ? "DirectSelectData" : NULL;
  	default:
  		return "Unknown";
  	}
  
  	if (length < 7 ||
  	    data[3] != SFE_VENDOR_DE_COMPANYID_0 ||
  	    data[4] != SFE_VENDOR_DE_COMPANYID_1 ||
  	    data[5] != SFE_VENDOR_DE_COMPANYID_2)
  		return "Vendor/Unknown";
  
  	switch (data[6]) {
  	case SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL:
  		return avc_debug & AVC_DEBUG_REGISTER_REMOTE_CONTROL ?
  				"RegisterRC" : NULL;
  	case SFE_VENDOR_OPCODE_LNB_CONTROL:
  		return avc_debug & AVC_DEBUG_LNB_CONTROL ? "LNBControl" : NULL;
  	case SFE_VENDOR_OPCODE_TUNE_QPSK:
  		return avc_debug & AVC_DEBUG_TUNE_QPSK ? "TuneQPSK" : NULL;
  	case SFE_VENDOR_OPCODE_TUNE_QPSK2:
  		return avc_debug & AVC_DEBUG_TUNE_QPSK2 ? "TuneQPSK2" : NULL;
  	case SFE_VENDOR_OPCODE_HOST2CA:
  		return avc_debug & AVC_DEBUG_HOST2CA ? "Host2CA" : NULL;
  	case SFE_VENDOR_OPCODE_CA2HOST:
  		return avc_debug & AVC_DEBUG_CA2HOST ? "CA2Host" : NULL;
  	}
  	return "Vendor/Unknown";
  }
  
  static void debug_fcp(const u8 *data, int length)
  {
  	unsigned int subunit_type, subunit_id, opcode;
  	const char *op, *prefix;
  
  	prefix       = data[0] > 7 ? "FCP <- " : "FCP -> ";
  	subunit_type = data[1] >> 3;
  	subunit_id   = data[1] & 7;
  	opcode       = subunit_type == 0x1e || subunit_id == 5 ? ~0 : data[2];
  	op           = debug_fcp_opcode(opcode, data, length);
  
  	if (op) {
  		printk(KERN_INFO "%ssu=%x.%x l=%d: %-8s - %s\n",
  		       prefix, subunit_type, subunit_id, length,
  		       debug_fcp_ctype(data[0]), op);
  		if (avc_debug & AVC_DEBUG_FCP_PAYLOADS)
  			print_hex_dump(KERN_INFO, prefix, DUMP_PREFIX_NONE,
  				       16, 1, data, length, false);
  	}
  }
  
  static void debug_pmt(char *msg, int length)
  {
  	printk(KERN_INFO "APP PMT -> l=%d\n", length);
  	print_hex_dump(KERN_INFO, "APP PMT -> ", DUMP_PREFIX_NONE,
  		       16, 1, msg, length, false);
  }
  
  static int avc_write(struct firedtv *fdtv)
  {
  	int err, retry;
  
  	fdtv->avc_reply_received = false;
  
  	for (retry = 0; retry < 6; retry++) {
  		if (unlikely(avc_debug))
  			debug_fcp(fdtv->avc_data, fdtv->avc_data_length);
  
  		err = fdtv_write(fdtv, FCP_COMMAND_REGISTER,
  				 fdtv->avc_data, fdtv->avc_data_length);
  		if (err) {
  			dev_err(fdtv->device, "FCP command write failed\n");
  
  			return err;
  		}
  
  		/*
  		 * AV/C specs say that answers should be sent within 150 ms.
  		 * Time out after 200 ms.
  		 */
  		if (wait_event_timeout(fdtv->avc_wait,
  				       fdtv->avc_reply_received,
  				       msecs_to_jiffies(200)) != 0)
  			return 0;
  	}
  	dev_err(fdtv->device, "FCP response timed out\n");
  
  	return -ETIMEDOUT;
  }
  
  static bool is_register_rc(struct avc_response_frame *r)
  {
  	return r->opcode     == AVC_OPCODE_VENDOR &&
  	       r->operand[0] == SFE_VENDOR_DE_COMPANYID_0 &&
  	       r->operand[1] == SFE_VENDOR_DE_COMPANYID_1 &&
  	       r->operand[2] == SFE_VENDOR_DE_COMPANYID_2 &&
  	       r->operand[3] == SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL;
  }
  
  int avc_recv(struct firedtv *fdtv, void *data, size_t length)
  {
  	struct avc_response_frame *r = data;
  
  	if (unlikely(avc_debug))
  		debug_fcp(data, length);
  
  	if (length >= 8 && is_register_rc(r)) {
  		switch (r->response) {
  		case AVC_RESPONSE_CHANGED:
  			fdtv_handle_rc(fdtv, r->operand[4] << 8 | r->operand[5]);
  			schedule_work(&fdtv->remote_ctrl_work);
  			break;
  		case AVC_RESPONSE_INTERIM:
  			if (is_register_rc((void *)fdtv->avc_data))
  				goto wake;
  			break;
  		default:
  			dev_info(fdtv->device,
  				 "remote control result = %d\n", r->response);
  		}
  		return 0;
  	}
  
  	if (fdtv->avc_reply_received) {
  		dev_err(fdtv->device, "out-of-order AVC response, ignored\n");
  		return -EIO;
  	}
  
  	memcpy(fdtv->avc_data, data, length);
  	fdtv->avc_data_length = length;
  wake:
  	fdtv->avc_reply_received = true;
  	wake_up(&fdtv->avc_wait);
  
  	return 0;
  }
  
  static int add_pid_filter(struct firedtv *fdtv, u8 *operand)
  {
  	int i, n, pos = 1;
  
  	for (i = 0, n = 0; i < 16; i++) {
  		if (test_bit(i, &fdtv->channel_active)) {
  			operand[pos++] = 0x13; /* flowfunction relay */
  			operand[pos++] = 0x80; /* dsd_sel_spec_valid_flags -> PID */
  			operand[pos++] = (fdtv->channel_pid[i] >> 8) & 0x1f;
  			operand[pos++] = fdtv->channel_pid[i] & 0xff;
  			operand[pos++] = 0x00; /* tableID */
  			operand[pos++] = 0x00; /* filter_length */
  			n++;
  		}
  	}
  	operand[0] = n;
  
  	return pos;
  }
  
  /*
   * tuning command for setting the relative LNB frequency
   * (not supported by the AVC standard)
   */
  static int avc_tuner_tuneqpsk(struct firedtv *fdtv,
  			      struct dtv_frontend_properties *p)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  
  	c->opcode = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	if (fdtv->type == FIREDTV_DVB_S2)
  		c->operand[3] = SFE_VENDOR_OPCODE_TUNE_QPSK2;
  	else
  		c->operand[3] = SFE_VENDOR_OPCODE_TUNE_QPSK;
  
  	c->operand[4] = (p->frequency >> 24) & 0xff;
  	c->operand[5] = (p->frequency >> 16) & 0xff;
  	c->operand[6] = (p->frequency >> 8) & 0xff;
  	c->operand[7] = p->frequency & 0xff;
  
  	c->operand[8] = ((p->symbol_rate / 1000) >> 8) & 0xff;
  	c->operand[9] = (p->symbol_rate / 1000) & 0xff;
  
  	switch (p->fec_inner) {
  	case FEC_1_2:	c->operand[10] = 0x1; break;
  	case FEC_2_3:	c->operand[10] = 0x2; break;
  	case FEC_3_4:	c->operand[10] = 0x3; break;
  	case FEC_5_6:	c->operand[10] = 0x4; break;
  	case FEC_7_8:	c->operand[10] = 0x5; break;
  	case FEC_4_5:
  	case FEC_8_9:
  	case FEC_AUTO:
  	default:	c->operand[10] = 0x0;
  	}
  
  	if (fdtv->voltage == 0xff)
  		c->operand[11] = 0xff;
  	else if (fdtv->voltage == SEC_VOLTAGE_18) /* polarisation */
  		c->operand[11] = 0;
  	else
  		c->operand[11] = 1;
  
  	if (fdtv->tone == 0xff)
  		c->operand[12] = 0xff;
  	else if (fdtv->tone == SEC_TONE_ON) /* band */
  		c->operand[12] = 1;
  	else
  		c->operand[12] = 0;
  
  	if (fdtv->type == FIREDTV_DVB_S2) {
  		if (fdtv->fe.dtv_property_cache.delivery_system == SYS_DVBS2) {
  			switch (fdtv->fe.dtv_property_cache.modulation) {
  			case QAM_16:		c->operand[13] = 0x1; break;
  			case QPSK:		c->operand[13] = 0x2; break;
  			case PSK_8:		c->operand[13] = 0x3; break;
  			default:		c->operand[13] = 0x2; break;
  			}
  			switch (fdtv->fe.dtv_property_cache.rolloff) {
  			case ROLLOFF_35:	c->operand[14] = 0x2; break;
  			case ROLLOFF_20:	c->operand[14] = 0x0; break;
  			case ROLLOFF_25:	c->operand[14] = 0x1; break;
  			case ROLLOFF_AUTO:
  			default:		c->operand[14] = 0x2; break;
  			/* case ROLLOFF_NONE:	c->operand[14] = 0xff; break; */
  			}
  			switch (fdtv->fe.dtv_property_cache.pilot) {
  			case PILOT_AUTO:	c->operand[15] = 0x0; break;
  			case PILOT_OFF:		c->operand[15] = 0x0; break;
  			case PILOT_ON:		c->operand[15] = 0x1; break;
  			}
  		} else {
  			c->operand[13] = 0x1;  /* auto modulation */
  			c->operand[14] = 0xff; /* disable rolloff */
  			c->operand[15] = 0xff; /* disable pilot */
  		}
  		return 16;
  	} else {
  		return 13;
  	}
  }
  
  static int avc_tuner_dsd_dvb_c(struct firedtv *fdtv,
  			       struct dtv_frontend_properties *p)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  
  	c->opcode = AVC_OPCODE_DSD;
  
  	c->operand[0] = 0;    /* source plug */
  	c->operand[1] = 0xd2; /* subfunction replace */
  	c->operand[2] = 0x20; /* system id = DVB */
  	c->operand[3] = 0x00; /* antenna number */
  	c->operand[4] = 0x11; /* system_specific_multiplex selection_length */
  
  	/* multiplex_valid_flags, high byte */
  	c->operand[5] =   0 << 7 /* reserved */
  			| 0 << 6 /* Polarisation */
  			| 0 << 5 /* Orbital_Pos */
  			| 1 << 4 /* Frequency */
  			| 1 << 3 /* Symbol_Rate */
  			| 0 << 2 /* FEC_outer */
  			| (p->fec_inner  != FEC_AUTO ? 1 << 1 : 0)
  			| (p->modulation != QAM_AUTO ? 1 << 0 : 0);
  
  	/* multiplex_valid_flags, low byte */
  	c->operand[6] =   0 << 7 /* NetworkID */
  			| 0 << 0 /* reserved */ ;
  
  	c->operand[7]  = 0x00;
  	c->operand[8]  = 0x00;
  	c->operand[9]  = 0x00;
  	c->operand[10] = 0x00;
  
  	c->operand[11] = (((p->frequency / 4000) >> 16) & 0xff) | (2 << 6);
  	c->operand[12] = ((p->frequency / 4000) >> 8) & 0xff;
  	c->operand[13] = (p->frequency / 4000) & 0xff;
  	c->operand[14] = ((p->symbol_rate / 1000) >> 12) & 0xff;
  	c->operand[15] = ((p->symbol_rate / 1000) >> 4) & 0xff;
  	c->operand[16] = ((p->symbol_rate / 1000) << 4) & 0xf0;
  	c->operand[17] = 0x00;
  
  	switch (p->fec_inner) {
  	case FEC_1_2:	c->operand[18] = 0x1; break;
  	case FEC_2_3:	c->operand[18] = 0x2; break;
  	case FEC_3_4:	c->operand[18] = 0x3; break;
  	case FEC_5_6:	c->operand[18] = 0x4; break;
  	case FEC_7_8:	c->operand[18] = 0x5; break;
  	case FEC_8_9:	c->operand[18] = 0x6; break;
  	case FEC_4_5:	c->operand[18] = 0x8; break;
  	case FEC_AUTO:
  	default:	c->operand[18] = 0x0;
  	}
  
  	switch (p->modulation) {
  	case QAM_16:	c->operand[19] = 0x08; break;
  	case QAM_32:	c->operand[19] = 0x10; break;
  	case QAM_64:	c->operand[19] = 0x18; break;
  	case QAM_128:	c->operand[19] = 0x20; break;
  	case QAM_256:	c->operand[19] = 0x28; break;
  	case QAM_AUTO:
  	default:	c->operand[19] = 0x00;
  	}
  
  	c->operand[20] = 0x00;
  	c->operand[21] = 0x00;
  
  	return 22 + add_pid_filter(fdtv, &c->operand[22]);
  }
  
  static int avc_tuner_dsd_dvb_t(struct firedtv *fdtv,
  			       struct dtv_frontend_properties *p)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  
  	c->opcode = AVC_OPCODE_DSD;
  
  	c->operand[0] = 0;    /* source plug */
  	c->operand[1] = 0xd2; /* subfunction replace */
  	c->operand[2] = 0x20; /* system id = DVB */
  	c->operand[3] = 0x00; /* antenna number */
  	c->operand[4] = 0x0c; /* system_specific_multiplex selection_length */
  
  	/* multiplex_valid_flags, high byte */
  	c->operand[5] =
  	      0 << 7 /* reserved */
  	    | 1 << 6 /* CenterFrequency */
  	    | (p->bandwidth_hz != 0        ? 1 << 5 : 0)
  	    | (p->modulation  != QAM_AUTO              ? 1 << 4 : 0)
  	    | (p->hierarchy != HIERARCHY_AUTO ? 1 << 3 : 0)
  	    | (p->code_rate_HP   != FEC_AUTO              ? 1 << 2 : 0)
  	    | (p->code_rate_LP   != FEC_AUTO              ? 1 << 1 : 0)
  	    | (p->guard_interval != GUARD_INTERVAL_AUTO   ? 1 << 0 : 0);
  
  	/* multiplex_valid_flags, low byte */
  	c->operand[6] =
  	      0 << 7 /* NetworkID */
  	    | (p->transmission_mode != TRANSMISSION_MODE_AUTO ? 1 << 6 : 0)
  	    | 0 << 5 /* OtherFrequencyFlag */
  	    | 0 << 0 /* reserved */ ;
  
  	c->operand[7]  = 0x0;
  	c->operand[8]  = (p->frequency / 10) >> 24;
  	c->operand[9]  = ((p->frequency / 10) >> 16) & 0xff;
  	c->operand[10] = ((p->frequency / 10) >>  8) & 0xff;
  	c->operand[11] = (p->frequency / 10) & 0xff;
  
  	switch (p->bandwidth_hz) {
  	case 7000000:	c->operand[12] = 0x20; break;
  	case 8000000:
  	case 6000000:	/* not defined by AVC spec */
  	case 0:
  	default:		c->operand[12] = 0x00;
  	}
  
  	switch (p->modulation) {
  	case QAM_16:	c->operand[13] = 1 << 6; break;
  	case QAM_64:	c->operand[13] = 2 << 6; break;
  	case QPSK:
  	default:	c->operand[13] = 0x00;
  	}
  
  	switch (p->hierarchy) {
  	case HIERARCHY_1:	c->operand[13] |= 1 << 3; break;
  	case HIERARCHY_2:	c->operand[13] |= 2 << 3; break;
  	case HIERARCHY_4:	c->operand[13] |= 3 << 3; break;
  	case HIERARCHY_AUTO:
  	case HIERARCHY_NONE:
  	default:		break;
  	}
  
  	switch (p->code_rate_HP) {
  	case FEC_2_3:	c->operand[13] |= 1; break;
  	case FEC_3_4:	c->operand[13] |= 2; break;
  	case FEC_5_6:	c->operand[13] |= 3; break;
  	case FEC_7_8:	c->operand[13] |= 4; break;
  	case FEC_1_2:
  	default:	break;
  	}
  
  	switch (p->code_rate_LP) {
  	case FEC_2_3:	c->operand[14] = 1 << 5; break;
  	case FEC_3_4:	c->operand[14] = 2 << 5; break;
  	case FEC_5_6:	c->operand[14] = 3 << 5; break;
  	case FEC_7_8:	c->operand[14] = 4 << 5; break;
  	case FEC_1_2:
  	default:	c->operand[14] = 0x00; break;
  	}
  
  	switch (p->guard_interval) {
  	case GUARD_INTERVAL_1_16:	c->operand[14] |= 1 << 3; break;
  	case GUARD_INTERVAL_1_8:	c->operand[14] |= 2 << 3; break;
  	case GUARD_INTERVAL_1_4:	c->operand[14] |= 3 << 3; break;
  	case GUARD_INTERVAL_1_32:
  	case GUARD_INTERVAL_AUTO:
  	default:			break;
  	}
  
  	switch (p->transmission_mode) {
  	case TRANSMISSION_MODE_8K:	c->operand[14] |= 1 << 1; break;
  	case TRANSMISSION_MODE_2K:
  	case TRANSMISSION_MODE_AUTO:
  	default:			break;
  	}
  
  	c->operand[15] = 0x00; /* network_ID[0] */
  	c->operand[16] = 0x00; /* network_ID[1] */
  
  	return 17 + add_pid_filter(fdtv, &c->operand[17]);
  }
  
  int avc_tuner_dsd(struct firedtv *fdtv,
  		  struct dtv_frontend_properties *p)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int pos, ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  
  	switch (fdtv->type) {
  	case FIREDTV_DVB_S:
  	case FIREDTV_DVB_S2: pos = avc_tuner_tuneqpsk(fdtv, p); break;
  	case FIREDTV_DVB_C: pos = avc_tuner_dsd_dvb_c(fdtv, p); break;
  	case FIREDTV_DVB_T: pos = avc_tuner_dsd_dvb_t(fdtv, p); break;
  	default:
  		BUG();
  	}
  	pad_operands(c, pos);
  
  	fdtv->avc_data_length = ALIGN(3 + pos, 4);
  	ret = avc_write(fdtv);
  #if 0
  	/*
  	 * FIXME:
  	 * u8 *status was an out-parameter of avc_tuner_dsd, unused by caller.
  	 * Check for AVC_RESPONSE_ACCEPTED here instead?
  	 */
  	if (status)
  		*status = r->operand[2];
  #endif
  	mutex_unlock(&fdtv->avc_mutex);
  
  	if (ret == 0)
  		msleep(500);
  
  	return ret;
  }
  
  int avc_tuner_set_pids(struct firedtv *fdtv, unsigned char pidc, u16 pid[])
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int ret, pos, k;
  
  	if (pidc > 16 && pidc != 0xff)
  		return -EINVAL;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_DSD;
  
  	c->operand[0] = 0;	/* source plug */
  	c->operand[1] = 0xd2;	/* subfunction replace */
  	c->operand[2] = 0x20;	/* system id = DVB */
  	c->operand[3] = 0x00;	/* antenna number */
  	c->operand[4] = 0x00;	/* system_specific_multiplex selection_length */
  	c->operand[5] = pidc;	/* Nr_of_dsd_sel_specs */
  
  	pos = 6;
  	if (pidc != 0xff)
  		for (k = 0; k < pidc; k++) {
  			c->operand[pos++] = 0x13; /* flowfunction relay */
  			c->operand[pos++] = 0x80; /* dsd_sel_spec_valid_flags -> PID */
  			c->operand[pos++] = (pid[k] >> 8) & 0x1f;
  			c->operand[pos++] = pid[k] & 0xff;
  			c->operand[pos++] = 0x00; /* tableID */
  			c->operand[pos++] = 0x00; /* filter_length */
  		}
  	pad_operands(c, pos);
  
  	fdtv->avc_data_length = ALIGN(3 + pos, 4);
  	ret = avc_write(fdtv);
  
  	/* FIXME: check response code? */
  
  	mutex_unlock(&fdtv->avc_mutex);
  
  	if (ret == 0)
  		msleep(50);
  
  	return ret;
  }
  
  int avc_tuner_get_ts(struct firedtv *fdtv)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int ret, sl;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_DSIT;
  
  	sl = fdtv->type == FIREDTV_DVB_T ? 0x0c : 0x11;
  
  	c->operand[0] = 0;	/* source plug */
  	c->operand[1] = 0xd2;	/* subfunction replace */
  	c->operand[2] = 0xff;	/* status */
  	c->operand[3] = 0x20;	/* system id = DVB */
  	c->operand[4] = 0x00;	/* antenna number */
  	c->operand[5] = 0x0; 	/* system_specific_search_flags */
  	c->operand[6] = sl;	/* system_specific_multiplex selection_length */
  	/*
  	 * operand[7]: valid_flags[0]
  	 * operand[8]: valid_flags[1]
  	 * operand[7 + sl]: nr_of_dsit_sel_specs (always 0)
  	 */
  	clear_operands(c, 7, 24);
  
  	fdtv->avc_data_length = fdtv->type == FIREDTV_DVB_T ? 24 : 28;
  	ret = avc_write(fdtv);
  
  	/* FIXME: check response code? */
  
  	mutex_unlock(&fdtv->avc_mutex);
  
  	if (ret == 0)
  		msleep(250);
  
  	return ret;
  }
  
  int avc_identify_subunit(struct firedtv *fdtv)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_READ_DESCRIPTOR;
  
  	c->operand[0] = DESCRIPTOR_SUBUNIT_IDENTIFIER;
  	c->operand[1] = 0xff;
  	c->operand[2] = 0x00;
  	c->operand[3] = 0x00; /* length highbyte */
  	c->operand[4] = 0x08; /* length lowbyte  */
  	c->operand[5] = 0x00; /* offset highbyte */
  	c->operand[6] = 0x0d; /* offset lowbyte  */
  	clear_operands(c, 7, 8); /* padding */
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	if ((r->response != AVC_RESPONSE_STABLE &&
  	     r->response != AVC_RESPONSE_ACCEPTED) ||
  	    (r->operand[3] << 8) + r->operand[4] != 8) {
  		dev_err(fdtv->device, "cannot read subunit identifier\n");
  		ret = -EINVAL;
  	}
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  #define SIZEOF_ANTENNA_INPUT_INFO 22
  
  int avc_tuner_status(struct firedtv *fdtv, struct firedtv_tuner_status *stat)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int length, ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_READ_DESCRIPTOR;
  
  	c->operand[0] = DESCRIPTOR_TUNER_STATUS;
  	c->operand[1] = 0xff;	/* read_result_status */
  	/*
  	 * operand[2]: reserved
  	 * operand[3]: SIZEOF_ANTENNA_INPUT_INFO >> 8
  	 * operand[4]: SIZEOF_ANTENNA_INPUT_INFO & 0xff
  	 */
  	clear_operands(c, 2, 31);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	if (r->response != AVC_RESPONSE_STABLE &&
  	    r->response != AVC_RESPONSE_ACCEPTED) {
  		dev_err(fdtv->device, "cannot read tuner status\n");
  		ret = -EINVAL;
  		goto out;
  	}
  
  	length = r->operand[9];
  	if (r->operand[1] != 0x10 || length != SIZEOF_ANTENNA_INPUT_INFO) {
  		dev_err(fdtv->device, "got invalid tuner status\n");
  		ret = -EINVAL;
  		goto out;
  	}
  
  	stat->active_system		= r->operand[10];
  	stat->searching			= r->operand[11] >> 7 & 1;
  	stat->moving			= r->operand[11] >> 6 & 1;
  	stat->no_rf			= r->operand[11] >> 5 & 1;
  	stat->input			= r->operand[12] >> 7 & 1;
  	stat->selected_antenna		= r->operand[12] & 0x7f;
  	stat->ber			= r->operand[13] << 24 |
  					  r->operand[14] << 16 |
  					  r->operand[15] << 8 |
  					  r->operand[16];
  	stat->signal_strength		= r->operand[17];
  	stat->raster_frequency		= r->operand[18] >> 6 & 2;
  	stat->rf_frequency		= (r->operand[18] & 0x3f) << 16 |
  					  r->operand[19] << 8 |
  					  r->operand[20];
  	stat->man_dep_info_length	= r->operand[21];
  	stat->front_end_error		= r->operand[22] >> 4 & 1;
  	stat->antenna_error		= r->operand[22] >> 3 & 1;
  	stat->front_end_power_status	= r->operand[22] >> 1 & 1;
  	stat->power_supply		= r->operand[22] & 1;
  	stat->carrier_noise_ratio	= r->operand[23] << 8 |
  					  r->operand[24];
  	stat->power_supply_voltage	= r->operand[27];
  	stat->antenna_voltage		= r->operand[28];
  	stat->firewire_bus_voltage	= r->operand[29];
  	stat->ca_mmi			= r->operand[30] & 1;
  	stat->ca_pmt_reply		= r->operand[31] >> 7 & 1;
  	stat->ca_date_time_request	= r->operand[31] >> 6 & 1;
  	stat->ca_application_info	= r->operand[31] >> 5 & 1;
  	stat->ca_module_present_status	= r->operand[31] >> 4 & 1;
  	stat->ca_dvb_flag		= r->operand[31] >> 3 & 1;
  	stat->ca_error_flag		= r->operand[31] >> 2 & 1;
  	stat->ca_initialization_status	= r->operand[31] >> 1 & 1;
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_lnb_control(struct firedtv *fdtv, char voltage, char burst,
  		    char conttone, char nrdiseq,
  		    struct dvb_diseqc_master_cmd *diseqcmd)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int pos, j, k, ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_LNB_CONTROL;
  	c->operand[4] = voltage;
  	c->operand[5] = nrdiseq;
  
  	pos = 6;
  	for (j = 0; j < nrdiseq; j++) {
  		c->operand[pos++] = diseqcmd[j].msg_len;
  
  		for (k = 0; k < diseqcmd[j].msg_len; k++)
  			c->operand[pos++] = diseqcmd[j].msg[k];
  	}
  	c->operand[pos++] = burst;
  	c->operand[pos++] = conttone;
  	pad_operands(c, pos);
  
  	fdtv->avc_data_length = ALIGN(3 + pos, 4);
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	if (r->response != AVC_RESPONSE_ACCEPTED) {
  		dev_err(fdtv->device, "LNB control failed\n");
  		ret = -EINVAL;
  	}
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_register_remote_control(struct firedtv *fdtv)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_NOTIFY;
  	c->subunit = AVC_SUBUNIT_TYPE_UNIT | 7;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_REGISTER_REMOTE_CONTROL;
  	c->operand[4] = 0; /* padding */
  
  	fdtv->avc_data_length = 8;
  	ret = avc_write(fdtv);
  
  	/* FIXME: check response code? */
  
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  void avc_remote_ctrl_work(struct work_struct *work)
  {
  	struct firedtv *fdtv =
  			container_of(work, struct firedtv, remote_ctrl_work);
  
  	/* Should it be rescheduled in failure cases? */
  	avc_register_remote_control(fdtv);
  }
  
  #if 0 /* FIXME: unused */
  int avc_tuner_host2ca(struct firedtv *fdtv)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_APPLICATION_INFO; /* ca tag */
  	clear_operands(c, 6, 8);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  
  	/* FIXME: check response code? */
  
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  #endif
  
  static int get_ca_object_pos(struct avc_response_frame *r)
  {
  	int length = 1;
  
  	/* Check length of length field */
  	if (r->operand[7] & 0x80)
  		length = (r->operand[7] & 0x7f) + 1;
  	return length + 7;
  }
  
  static int get_ca_object_length(struct avc_response_frame *r)
  {
  #if 0 /* FIXME: unused */
  	int size = 0;
  	int i;
  
  	if (r->operand[7] & 0x80)
  		for (i = 0; i < (r->operand[7] & 0x7f); i++) {
  			size <<= 8;
  			size += r->operand[8 + i];
  		}
  #endif
  	return r->operand[7];
  }
  
  int avc_ca_app_info(struct firedtv *fdtv, char *app_info, unsigned int *len)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int pos, ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_STATUS;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_APPLICATION_INFO; /* ca tag */
  	clear_operands(c, 6, LAST_OPERAND);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	/* FIXME: check response code and validate response data */
  
  	pos = get_ca_object_pos(r);
  	app_info[0] = (EN50221_TAG_APP_INFO >> 16) & 0xff;
  	app_info[1] = (EN50221_TAG_APP_INFO >>  8) & 0xff;
  	app_info[2] = (EN50221_TAG_APP_INFO >>  0) & 0xff;
  	app_info[3] = 6 + r->operand[pos + 4];
  	app_info[4] = 0x01;
  	memcpy(&app_info[5], &r->operand[pos], 5 + r->operand[pos + 4]);
  	*len = app_info[3] + 4;
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_ca_info(struct firedtv *fdtv, char *app_info, unsigned int *len)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int i, pos, ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_STATUS;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_APPLICATION_INFO; /* ca tag */
  	clear_operands(c, 6, LAST_OPERAND);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	/* FIXME: check response code and validate response data */
  
  	pos = get_ca_object_pos(r);
  	app_info[0] = (EN50221_TAG_CA_INFO >> 16) & 0xff;
  	app_info[1] = (EN50221_TAG_CA_INFO >>  8) & 0xff;
  	app_info[2] = (EN50221_TAG_CA_INFO >>  0) & 0xff;
  	if (num_fake_ca_system_ids == 0) {
  		app_info[3] = 2;
  		app_info[4] = r->operand[pos + 0];
  		app_info[5] = r->operand[pos + 1];
  	} else {
  		app_info[3] = num_fake_ca_system_ids * 2;
  		for (i = 0; i < num_fake_ca_system_ids; i++) {
  			app_info[4 + i * 2] =
  				(fake_ca_system_ids[i] >> 8) & 0xff;
  			app_info[5 + i * 2] = fake_ca_system_ids[i] & 0xff;
  		}
  	}
  	*len = app_info[3] + 4;
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_ca_reset(struct firedtv *fdtv)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_RESET; /* ca tag */
  	c->operand[6] = 0; /* more/last */
  	c->operand[7] = 1; /* length */
  	c->operand[8] = 0; /* force hardware reset */
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  
  	/* FIXME: check response code? */
  
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_ca_pmt(struct firedtv *fdtv, char *msg, int length)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int list_management;
  	int program_info_length;
  	int pmt_cmd_id;
  	int read_pos;
  	int write_pos;
  	int es_info_length;
  	int crc32_csum;
  	int ret;
  
  	if (unlikely(avc_debug & AVC_DEBUG_APPLICATION_PMT))
  		debug_pmt(msg, length);
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_CONTROL;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	if (msg[0] != EN50221_LIST_MANAGEMENT_ONLY) {
  		dev_info(fdtv->device, "forcing list_management to ONLY\n");
  		msg[0] = EN50221_LIST_MANAGEMENT_ONLY;
  	}
  	/* We take the cmd_id from the programme level only! */
  	list_management = msg[0];
  	program_info_length = ((msg[4] & 0x0f) << 8) + msg[5];
  	if (program_info_length > 0)
  		program_info_length--; /* Remove pmt_cmd_id */
  	pmt_cmd_id = msg[6];
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_PMT; /* ca tag */
  	c->operand[6] = 0; /* more/last */
  	/* Use three bytes for length field in case length > 127 */
  	c->operand[10] = list_management;
  	c->operand[11] = 0x01; /* pmt_cmd=OK_descramble */
  
  	/* TS program map table */
  
  	c->operand[12] = 0x02; /* Table id=2 */
  	c->operand[13] = 0x80; /* Section syntax + length */
  
  	c->operand[15] = msg[1]; /* Program number */
  	c->operand[16] = msg[2];
  	c->operand[17] = msg[3]; /* Version number and current/next */
  	c->operand[18] = 0x00; /* Section number=0 */
  	c->operand[19] = 0x00; /* Last section number=0 */
  	c->operand[20] = 0x1f; /* PCR_PID=1FFF */
  	c->operand[21] = 0xff;
  	c->operand[22] = (program_info_length >> 8); /* Program info length */
  	c->operand[23] = (program_info_length & 0xff);
  
  	/* CA descriptors at programme level */
  	read_pos = 6;
  	write_pos = 24;
  	if (program_info_length > 0) {
  		pmt_cmd_id = msg[read_pos++];
  		if (pmt_cmd_id != 1 && pmt_cmd_id != 4)
  			dev_err(fdtv->device,
  				"invalid pmt_cmd_id %d\n", pmt_cmd_id);
  
  		memcpy(&c->operand[write_pos], &msg[read_pos],
  		       program_info_length);
  		read_pos += program_info_length;
  		write_pos += program_info_length;
  	}
  	while (read_pos < length) {
  		c->operand[write_pos++] = msg[read_pos++];
  		c->operand[write_pos++] = msg[read_pos++];
  		c->operand[write_pos++] = msg[read_pos++];
  		es_info_length =
  			((msg[read_pos] & 0x0f) << 8) + msg[read_pos + 1];
  		read_pos += 2;
  		if (es_info_length > 0)
  			es_info_length--; /* Remove pmt_cmd_id */
  		c->operand[write_pos++] = es_info_length >> 8;
  		c->operand[write_pos++] = es_info_length & 0xff;
  		if (es_info_length > 0) {
  			pmt_cmd_id = msg[read_pos++];
  			if (pmt_cmd_id != 1 && pmt_cmd_id != 4)
  				dev_err(fdtv->device, "invalid pmt_cmd_id %d "
  					"at stream level\n", pmt_cmd_id);
  
  			memcpy(&c->operand[write_pos], &msg[read_pos],
  			       es_info_length);
  			read_pos += es_info_length;
  			write_pos += es_info_length;
  		}
  	}
  	write_pos += 4; /* CRC */
  
  	c->operand[7] = 0x82;
  	c->operand[8] = (write_pos - 10) >> 8;
  	c->operand[9] = (write_pos - 10) & 0xff;
  	c->operand[14] = write_pos - 15;
  
  	crc32_csum = crc32_be(0, &c->operand[10], c->operand[12] - 1);
  	c->operand[write_pos - 4] = (crc32_csum >> 24) & 0xff;
  	c->operand[write_pos - 3] = (crc32_csum >> 16) & 0xff;
  	c->operand[write_pos - 2] = (crc32_csum >>  8) & 0xff;
  	c->operand[write_pos - 1] = (crc32_csum >>  0) & 0xff;
  	pad_operands(c, write_pos);
  
  	fdtv->avc_data_length = ALIGN(3 + write_pos, 4);
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	if (r->response != AVC_RESPONSE_ACCEPTED) {
  		dev_err(fdtv->device,
  			"CA PMT failed with response 0x%x\n", r->response);
  		ret = -EACCES;
  	}
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_ca_get_time_date(struct firedtv *fdtv, int *interval)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_STATUS;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_DATE_TIME; /* ca tag */
  	clear_operands(c, 6, LAST_OPERAND);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	/* FIXME: check response code and validate response data */
  
  	*interval = r->operand[get_ca_object_pos(r)];
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_ca_enter_menu(struct firedtv *fdtv)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_STATUS;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_HOST2CA;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_ENTER_MENU;
  	clear_operands(c, 6, 8);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  
  	/* FIXME: check response code? */
  
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  int avc_ca_get_mmi(struct firedtv *fdtv, char *mmi_object, unsigned int *len)
  {
  	struct avc_command_frame *c = (void *)fdtv->avc_data;
  	struct avc_response_frame *r = (void *)fdtv->avc_data;
  	int ret;
  
  	mutex_lock(&fdtv->avc_mutex);
  
  	c->ctype   = AVC_CTYPE_STATUS;
  	c->subunit = AVC_SUBUNIT_TYPE_TUNER | fdtv->subunit;
  	c->opcode  = AVC_OPCODE_VENDOR;
  
  	c->operand[0] = SFE_VENDOR_DE_COMPANYID_0;
  	c->operand[1] = SFE_VENDOR_DE_COMPANYID_1;
  	c->operand[2] = SFE_VENDOR_DE_COMPANYID_2;
  	c->operand[3] = SFE_VENDOR_OPCODE_CA2HOST;
  	c->operand[4] = 0; /* slot */
  	c->operand[5] = SFE_VENDOR_TAG_CA_MMI;
  	clear_operands(c, 6, LAST_OPERAND);
  
  	fdtv->avc_data_length = 12;
  	ret = avc_write(fdtv);
  	if (ret < 0)
  		goto out;
  
  	/* FIXME: check response code and validate response data */
  
  	*len = get_ca_object_length(r);
  	memcpy(mmi_object, &r->operand[get_ca_object_pos(r)], *len);
  out:
  	mutex_unlock(&fdtv->avc_mutex);
  
  	return ret;
  }
  
  #define CMP_OUTPUT_PLUG_CONTROL_REG_0	0xfffff0000904ULL
  
  static int cmp_read(struct firedtv *fdtv, u64 addr, __be32 *data)
  {
  	int ret;
  
  	ret = fdtv_read(fdtv, addr, data);
  	if (ret < 0)
  		dev_err(fdtv->device, "CMP: read I/O error\n");
  
  	return ret;
  }
  
  static int cmp_lock(struct firedtv *fdtv, u64 addr, __be32 data[])
  {
  	int ret;
  
  	ret = fdtv_lock(fdtv, addr, data);
  	if (ret < 0)
  		dev_err(fdtv->device, "CMP: lock I/O error\n");
  
  	return ret;
  }
  
  static inline u32 get_opcr(__be32 opcr, u32 mask, u32 shift)
  {
  	return (be32_to_cpu(opcr) >> shift) & mask;
  }
  
  static inline void set_opcr(__be32 *opcr, u32 value, u32 mask, u32 shift)
  {
  	*opcr &= ~cpu_to_be32(mask << shift);
  	*opcr |= cpu_to_be32((value & mask) << shift);
  }
  
  #define get_opcr_online(v)		get_opcr((v), 0x1, 31)
  #define get_opcr_p2p_connections(v)	get_opcr((v), 0x3f, 24)
  #define get_opcr_channel(v)		get_opcr((v), 0x3f, 16)
  
  #define set_opcr_p2p_connections(p, v)	set_opcr((p), (v), 0x3f, 24)
  #define set_opcr_channel(p, v)		set_opcr((p), (v), 0x3f, 16)
  #define set_opcr_data_rate(p, v)	set_opcr((p), (v), 0x3, 14)
  #define set_opcr_overhead_id(p, v)	set_opcr((p), (v), 0xf, 10)
  
  int cmp_establish_pp_connection(struct firedtv *fdtv, int plug, int channel)
  {
  	__be32 old_opcr, opcr[2];
  	u64 opcr_address = CMP_OUTPUT_PLUG_CONTROL_REG_0 + (plug << 2);
  	int attempts = 0;
  	int ret;
  
  	ret = cmp_read(fdtv, opcr_address, opcr);
  	if (ret < 0)
  		return ret;
  
  repeat:
  	if (!get_opcr_online(*opcr)) {
  		dev_err(fdtv->device, "CMP: output offline\n");
  		return -EBUSY;
  	}
  
  	old_opcr = *opcr;
  
  	if (get_opcr_p2p_connections(*opcr)) {
  		if (get_opcr_channel(*opcr) != channel) {
  			dev_err(fdtv->device, "CMP: cannot change channel\n");
  			return -EBUSY;
  		}
  		dev_info(fdtv->device, "CMP: overlaying connection\n");
  
  		/* We don't allocate isochronous resources. */
  	} else {
  		set_opcr_channel(opcr, channel);
  		set_opcr_data_rate(opcr, 2); /* S400 */
  
  		/* FIXME: this is for the worst case - optimize */
  		set_opcr_overhead_id(opcr, 0);
  
  		/* FIXME: allocate isochronous channel and bandwidth at IRM */
  	}
  
  	set_opcr_p2p_connections(opcr, get_opcr_p2p_connections(*opcr) + 1);
  
  	opcr[1] = *opcr;
  	opcr[0] = old_opcr;
  
  	ret = cmp_lock(fdtv, opcr_address, opcr);
  	if (ret < 0)
  		return ret;
  
  	if (old_opcr != *opcr) {
  		/*
  		 * FIXME: if old_opcr.P2P_Connections > 0,
  		 * deallocate isochronous channel and bandwidth at IRM
  		 */
  
  		if (++attempts < 6) /* arbitrary limit */
  			goto repeat;
  		return -EBUSY;
  	}
  
  	return 0;
  }
  
  void cmp_break_pp_connection(struct firedtv *fdtv, int plug, int channel)
  {
  	__be32 old_opcr, opcr[2];
  	u64 opcr_address = CMP_OUTPUT_PLUG_CONTROL_REG_0 + (plug << 2);
  	int attempts = 0;
  
  	if (cmp_read(fdtv, opcr_address, opcr) < 0)
  		return;
  
  repeat:
  	if (!get_opcr_online(*opcr) || !get_opcr_p2p_connections(*opcr) ||
  	    get_opcr_channel(*opcr) != channel) {
  		dev_err(fdtv->device, "CMP: no connection to break\n");
  		return;
  	}
  
  	old_opcr = *opcr;
  	set_opcr_p2p_connections(opcr, get_opcr_p2p_connections(*opcr) - 1);
  
  	opcr[1] = *opcr;
  	opcr[0] = old_opcr;
  
  	if (cmp_lock(fdtv, opcr_address, opcr) < 0)
  		return;
  
  	if (old_opcr != *opcr) {
  		/*
  		 * FIXME: if old_opcr.P2P_Connections == 1, i.e. we were last
  		 * owner, deallocate isochronous channel and bandwidth at IRM
  		 * if (...)
  		 *	fdtv->backend->dealloc_resources(fdtv, channel, bw);
  		 */
  
  		if (++attempts < 6) /* arbitrary limit */
  			goto repeat;
  	}
  }
  