eicon_idi.c

讲述linux的初始化过程

					memcpy(&manbuf->data[manbuf->pos], &buffer[pos], wlen);
					manbuf->length[manbuf->count] = wlen;
					manbuf->count++;
					manbuf->pos += wlen;
				}
				pos += wlen;
				break;
			default:
				pos += wlen;
				eicon_log(ccard, 6, "idi_inf: Ch%d: unknown information element 0x%x in ind, len:%x\n", 
					chan->No, code, wlen);
		}
	}
  }
}

void
idi_bc2si(unsigned char *bc, unsigned char *hlc, unsigned char *sin, unsigned char *si1, unsigned char *si2)
{
	si1[0] = 0;
	si2[0] = 0;

	switch (bc[0] & 0x7f) {
		case 0x00: /* Speech */
			si1[0] = 1;
#ifdef EICON_FULL_SERVICE_OKTETT
			si1[0] = sin[0];
			si2[0] = sin[1];
#endif
			break;
		case 0x10: /* 3.1 Khz audio */
			si1[0] = 1;
#ifdef EICON_FULL_SERVICE_OKTETT
			si1[0] = sin[0];
			si2[0] = sin[1];
#endif
			break;
		case 0x08: /* Unrestricted digital information */
			si1[0] = 7;
			si2[0] = sin[1];
			break;
		case 0x09: /* Restricted digital information */
			si1[0] = 2;
			break;
		case 0x11:
			/* Unrestr. digital information  with
			 * tones/announcements ( or 7 kHz audio
			 */
			si1[0] = 3;
			break;
		case 0x18: /* Video */
			si1[0] = 4;
			break;
	}
	switch (bc[1] & 0x7f) {
		case 0x40: /* packed mode */
			si1[0] = 8;
			break;
		case 0x10: /* 64 kbit */
		case 0x11: /* 2*64 kbit */
		case 0x13: /* 384 kbit */
		case 0x15: /* 1536 kbit */
		case 0x17: /* 1920 kbit */
			/* moderate = bc[1] & 0x7f; */
			break;
	}
}

/********************* FAX stuff ***************************/

#ifdef CONFIG_ISDN_TTY_FAX

int
idi_fill_in_T30(eicon_chan *chan, unsigned char *buffer)
{
	eicon_t30_s	*t30 = (eicon_t30_s *) buffer;

	if (!chan->fax) {
		eicon_log(NULL, 1,"idi_T30: fill_in with NULL fax struct, ERROR\n");
		return 0;
	}
	memset(t30, 0, sizeof(eicon_t30_s));
	t30->station_id_len = EICON_FAXID_LEN;
	memcpy(&t30->station_id[0], &chan->fax->id[0], EICON_FAXID_LEN);
	t30->resolution = chan->fax->resolution;
	t30->rate = chan->fax->rate + 1;	/* eicon rate starts with 1 */
	t30->format = T30_FORMAT_SFF;
	t30->pages_low = 0;
	t30->pages_high = 0;
	t30->atf = 1;				/* optimised for AT+F command set */
	t30->code = 0;
	t30->feature_bits_low = 0;
	t30->feature_bits_high = 0;
	t30->control_bits_low = 0;
	t30->control_bits_high = 0;

	if (chan->fax->nbc) {
		/* set compression by DCC value */
  	  switch(chan->fax->compression) {
		case (0):	/* 1-D modified */
			break;
		case (1):	/* 2-D modified Read */
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_2D_CODING;
			t30->feature_bits_low |= T30_FEATURE_BIT_2D_CODING;
			break;
		case (2):	/* 2-D uncompressed */
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_UNCOMPR;
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_2D_CODING;
			t30->feature_bits_low |= T30_FEATURE_BIT_UNCOMPR_ENABLED;
			t30->feature_bits_low |= T30_FEATURE_BIT_2D_CODING;
			break;
		case (3):	/* 2-D modified Read */
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_T6_CODING;
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_2D_CODING;
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_UNCOMPR;
			t30->feature_bits_low |= T30_FEATURE_BIT_UNCOMPR_ENABLED;
			t30->feature_bits_low |= T30_FEATURE_BIT_T6_CODING;
			t30->feature_bits_low |= T30_FEATURE_BIT_2D_CODING;
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_ECM;
			t30->feature_bits_low |= T30_FEATURE_BIT_ECM;
			break;
	  }
	} else {
		/* set compression to best */
		t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_T6_CODING;
		t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_2D_CODING;
		t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_UNCOMPR;
		t30->feature_bits_low |= T30_FEATURE_BIT_UNCOMPR_ENABLED;
		t30->feature_bits_low |= T30_FEATURE_BIT_T6_CODING;
		t30->feature_bits_low |= T30_FEATURE_BIT_2D_CODING;
		t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_ECM;
		t30->feature_bits_low |= T30_FEATURE_BIT_ECM;
	}
	switch(chan->fax->ecm) {
		case (0):	/* disable ECM */
			break;
		case (1):
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_ECM;
			t30->control_bits_low |= T30_CONTROL_BIT_ECM_64_BYTES;
			t30->feature_bits_low |= T30_FEATURE_BIT_ECM;
			t30->feature_bits_low |= T30_FEATURE_BIT_ECM_64_BYTES;
			break;
		case (2):
			t30->control_bits_low |= T30_CONTROL_BIT_ENABLE_ECM;
			t30->feature_bits_low |= T30_FEATURE_BIT_ECM;
			break;
	}

	if (DebugVar & 128) {
		char st[40];
		eicon_log(NULL, 128, "sT30:code = %x\n", t30->code);
		eicon_log(NULL, 128, "sT30:rate = %x\n", t30->rate);
		eicon_log(NULL, 128, "sT30:res  = %x\n", t30->resolution);
		eicon_log(NULL, 128, "sT30:format = %x\n", t30->format);
		eicon_log(NULL, 128, "sT30:pages_low = %x\n", t30->pages_low);
		eicon_log(NULL, 128, "sT30:pages_high = %x\n", t30->pages_high);
		eicon_log(NULL, 128, "sT30:atf  = %x\n", t30->atf);
		eicon_log(NULL, 128, "sT30:control_bits_low = %x\n", t30->control_bits_low);
		eicon_log(NULL, 128, "sT30:control_bits_high = %x\n", t30->control_bits_high);
		eicon_log(NULL, 128, "sT30:feature_bits_low = %x\n", t30->feature_bits_low);
		eicon_log(NULL, 128, "sT30:feature_bits_high = %x\n", t30->feature_bits_high);
		//eicon_log(NULL, 128, "sT30:universal_5 = %x\n", t30->universal_5);
		//eicon_log(NULL, 128, "sT30:universal_6 = %x\n", t30->universal_6);
		//eicon_log(NULL, 128, "sT30:universal_7 = %x\n", t30->universal_7);
		eicon_log(NULL, 128, "sT30:station_id_len = %x\n", t30->station_id_len);
		eicon_log(NULL, 128, "sT30:head_line_len = %x\n", t30->head_line_len);
		strncpy(st, t30->station_id, t30->station_id_len);
		st[t30->station_id_len] = 0;
		eicon_log(NULL, 128, "sT30:station_id = <%s>\n", st);
	}
	return(sizeof(eicon_t30_s));
}

/* send fax struct */
int
idi_send_edata(eicon_card *card, eicon_chan *chan)
{
	struct sk_buff *skb;
	struct sk_buff *skb2;
	eicon_REQ *reqbuf;
	eicon_chan_ptr *chan2;

	if ((chan->fsm_state == EICON_STATE_NULL) || (chan->fsm_state == EICON_STATE_LISTEN)) {
		eicon_log(card, 1, "idi_snd: Ch%d: send edata on state %d !\n", chan->No, chan->fsm_state);
		return -ENODEV;
	}
	eicon_log(card, 128, "idi_snd: Ch%d: edata (fax)\n", chan->No);

	skb = alloc_skb(sizeof(eicon_REQ) + sizeof(eicon_t30_s), GFP_ATOMIC);
	skb2 = alloc_skb(sizeof(eicon_chan_ptr), GFP_ATOMIC);

	if ((!skb) || (!skb2)) {
		eicon_log(card, 1, "idi_err: Ch%d: alloc_skb failed in send_edata()\n", chan->No);
		if (skb) 
			dev_kfree_skb(skb);
		if (skb2) 
			dev_kfree_skb(skb2);
		return -ENOMEM;
	}

	chan2 = (eicon_chan_ptr *)skb_put(skb2, sizeof(eicon_chan_ptr));
	chan2->ptr = chan;

	reqbuf = (eicon_REQ *)skb_put(skb, sizeof(eicon_t30_s) + sizeof(eicon_REQ));

	reqbuf->Req = N_EDATA;
	reqbuf->ReqCh = chan->e.IndCh;
	reqbuf->ReqId = 1;

	reqbuf->XBuffer.length = idi_fill_in_T30(chan, reqbuf->XBuffer.P);
	reqbuf->Reference = 1; /* Net Entity */

	skb_queue_tail(&chan->e.X, skb);
	skb_queue_tail(&card->sndq, skb2);
	eicon_schedule_tx(card);
	return (0);
}

void
idi_parse_edata(eicon_card *ccard, eicon_chan *chan, unsigned char *buffer, int len)
{
	eicon_t30_s *p = (eicon_t30_s *)buffer;
	int i;

	if (DebugVar & 128) {
		char st[40];
		eicon_log(ccard, 128, "rT30:len %d , size %d\n", len, sizeof(eicon_t30_s));
		eicon_log(ccard, 128, "rT30:code = %x\n", p->code);
		eicon_log(ccard, 128, "rT30:rate = %x\n", p->rate);
		eicon_log(ccard, 128, "rT30:res  = %x\n", p->resolution);
		eicon_log(ccard, 128, "rT30:format = %x\n", p->format);
		eicon_log(ccard, 128, "rT30:pages_low = %x\n", p->pages_low);
		eicon_log(ccard, 128, "rT30:pages_high = %x\n", p->pages_high);
		eicon_log(ccard, 128, "rT30:atf  = %x\n", p->atf);
		eicon_log(ccard, 128, "rT30:control_bits_low = %x\n", p->control_bits_low);
		eicon_log(ccard, 128, "rT30:control_bits_high = %x\n", p->control_bits_high);
		eicon_log(ccard, 128, "rT30:feature_bits_low = %x\n", p->feature_bits_low);
		eicon_log(ccard, 128, "rT30:feature_bits_high = %x\n", p->feature_bits_high);
		//eicon_log(ccard, 128, "rT30:universal_5 = %x\n", p->universal_5);
		//eicon_log(ccard, 128, "rT30:universal_6 = %x\n", p->universal_6);
		//eicon_log(ccard, 128, "rT30:universal_7 = %x\n", p->universal_7);
		eicon_log(ccard, 128, "rT30:station_id_len = %x\n", p->station_id_len);
		eicon_log(ccard, 128, "rT30:head_line_len = %x\n", p->head_line_len);
		strncpy(st, p->station_id, p->station_id_len);
		st[p->station_id_len] = 0;
		eicon_log(ccard, 128, "rT30:station_id = <%s>\n", st);
	}
	if (!chan->fax) {
		eicon_log(ccard, 1, "idi_edata: parse to NULL fax struct, ERROR\n");
		return;
	}
	chan->fax->code = p->code;
	i = (p->station_id_len < FAXIDLEN) ? p->station_id_len : (FAXIDLEN - 1);
	memcpy(chan->fax->r_id, p->station_id, i);
	chan->fax->r_id[i] = 0;
	chan->fax->r_resolution = p->resolution;
	chan->fax->r_rate = p->rate - 1;
	chan->fax->r_binary = 0; /* no binary support */
	chan->fax->r_width = 0;
	chan->fax->r_length = 2;
	chan->fax->r_scantime = 0;
	chan->fax->r_compression = 0;
	chan->fax->r_ecm = 0;
	if (p->feature_bits_low & T30_FEATURE_BIT_2D_CODING) {
		chan->fax->r_compression = 1;
		if (p->feature_bits_low & T30_FEATURE_BIT_UNCOMPR_ENABLED) {
			chan->fax->r_compression = 2;
		}
	}
	if (p->feature_bits_low & T30_FEATURE_BIT_T6_CODING) {
		chan->fax->r_compression = 3;
	}

	if (p->feature_bits_low & T30_FEATURE_BIT_ECM) {
		chan->fax->r_ecm = 2;
		if (p->feature_bits_low & T30_FEATURE_BIT_ECM_64_BYTES)
			chan->fax->r_ecm = 1;
	}
}

void
idi_fax_send_header(eicon_card *card, eicon_chan *chan, int header)
{
	static __u16 wd2sff[] = {
		1728, 2048, 2432, 1216, 864
	};
	static __u16 ln2sff[2][3] = {
		{ 1143, 1401, 0 } , { 2287, 2802, 0 }
	};
	struct sk_buff *skb;
	eicon_sff_dochead *doc;
	eicon_sff_pagehead *page;
	u_char *docp;

	if (!chan->fax) {
		eicon_log(card, 1, "idi_fax: send head with NULL fax struct, ERROR\n");
		return;
	}
	if (header == 2) { /* DocHeader + PageHeader */
		skb = alloc_skb(sizeof(eicon_sff_dochead) + sizeof(eicon_sff_pagehead), GFP_ATOMIC);
	} else {
		skb = alloc_skb(sizeof(eicon_sff_pagehead), GFP_ATOMIC);
	}
	if (!skb) {
		eicon_log(card, 1, "idi_err: Ch%d: alloc_skb failed in fax_send_header()\n", chan->No);
		return;
	}

	if (header == 2) { /* DocHeader + PageHeader */
		docp = skb_put(skb, sizeof(eicon_sff_dochead) + sizeof(eicon_sff_pagehead));
		doc = (eicon_sff_dochead *) docp;
		page = (eicon_sff_pagehead *) (docp + sizeof(eicon_sff_dochead));
		memset(docp, 0,sizeof(eicon_sff_dochead)  + sizeof(eicon_sff_pagehead));
		doc->id = 0x66666653;
		doc->version = 0x01;
		doc->off1pagehead = sizeof(eicon_sff_dochead);
	} else {
		page = (eicon_sff_pagehead *)skb_put(skb, sizeof(eicon_sff_pagehead));
		memset(page, 0, sizeof(eicon_sff_pagehead));
	}

	switch(header) {
		case 1:	/* PageHeaderEnd */
			page->pageheadid = 254;
			page->pageheadlen = 0; 
			break;
		case 0: /* PageHeader */
		case 2: /* DocHeader + PageHeader */
			page->pageheadid = 254;
			page->pageheadlen = sizeof(eicon_sff_pagehead) - 2;
			page->resvert = chan->fax->resolution;
			page->reshoriz = 0; /* always 203 dpi */
			page->coding = 0; /* always 1D */
			page->linelength = wd2sff[chan->fax->width];
			page->pagelength = ln2sff[chan->fax->resolution][chan->fax->length]; 
			eicon_log(card, 128, "sSFF-Head: linelength = %d\n", page->linelength);
			eicon_log(card, 128, "sSFF-Head: pagelength = %d\n", page->pagelength);
			break;
	}
	idi_send_data(card, chan, 0, skb, 0, 0);
}

void
idi_fax_cmd(eicon_card *card, eicon_chan *chan) 
{
	isdn_ctrl cmd;

	if ((!card) || (!chan))
		return;

	if (!chan->fax) {
		eicon_log(card, 1, "idi_fax: cmd with NULL fax struct, ERROR\n");
		return;
	}
	switch (chan->fax->code) {
		case ISDN_TTY_FAX_DT:
			if (chan->fax->phase == ISDN_FAX_PHASE_B) {
				idi_send_edata(card, chan);
				break;
			}
			if (chan->fax->phase == ISDN_FAX_PHASE_D) {
				idi_send_edata(card, chan);
				break;
			}
			break;

		case ISDN_TTY_FAX_DR:
			if (chan->fax->phase == ISDN_FAX_PHASE_B) {
				idi_send_edata(card, chan);

				cmd.driver = card->myid;
				cmd.command = ISDN_STAT_FAXIND;
				cmd.arg = chan->No;
				chan->fax->r_code = ISDN_TTY_FAX_CFR;
				card->interface.statcallb(&cmd);

				cmd.driver = card->myid;
				cmd.command = ISDN_STAT_FAXIND;
				cmd.arg = chan->No;
				chan->fax->r_code = ISDN_TTY_FAX_RID;
				card->interface.statcallb(&cmd);

				/* telling 1-D compression */
				chan->fax->r_compression = 0;
				cmd.driver = card->myid;
				cmd.command = ISDN_STAT_FAXIND;
				cmd.arg = chan->No;
				chan->fax->r_code = ISDN_TTY_FAX_DCS;
				card->interface.statcallb(&cmd);

				chan->fax2.NextObject = FAX_OBJECT_DOCU;
				chan->fax2.PrevObject = FAX_OBJECT_DOCU;

				break;
			}
			if (chan->fax->phase == ISDN_FAX_PHASE_D) {
				idi_send_edata(card, chan);
				break;
			}
			break;

		case ISDN_TTY_FAX_ET:
				switch(chan->fax->fet) {
					case 0:
					case 1:
						idi_fax_send_header(card, chan, 0);
						break;
					case 2:
						idi_fax_send_header(card, chan, 1);
						break;
				}
			break;
	}
}

void
idi_edata_rcveop(eicon_card *card, eicon_chan *chan)
{
	isdn_ctrl cmd;

	if (!chan->fax) {
		eicon_log(card, 1, "idi_edata: rcveop with NULL fax struct, ERROR\n");
		return;
	}
	cmd.driver = card->myid;
	cmd.command = ISDN_STAT_FAXIND;
	cmd.arg = chan->No;
	chan->fax->r_code = ISDN_TTY_FAX_ET;
	card->interface.statcallb(&cmd);
}

void
idi_reset_fax_stat(eicon_chan *chan)
{
	chan->fax2.LineLen = 0;
	chan->fax2.LineData = 0;
	chan->fax2.LineDataLen = 0;
	chan->fax2.NullByteExist = 0;
	chan->fax2.Dle = 0;
	chan->fax2.PageCount = 0;
	chan->fax2.Eop = 0;
}

void
idi_edata_action(eicon_card *ccard, eicon_chan *chan, char *buffer, int len)
{
	isdn_ctrl cmd;

	if (!chan->fax) {
		eicon_log(ccard, 1, "idi_edata: action with NULL fax struct, ERROR\n");
		return;
	}
	if (chan->fax->direction == ISDN_TTY_FAX_CONN_OUT) {
		idi_parse_edata(ccard, chan, buffer, len);

		if (chan->fax->phase == ISDN_FAX_PHASE_A) {
			idi_reset_fax_stat(chan);

			chan->fsm_state = EICON_STATE_ACTIVE;
			cmd.driver = ccard->myid;
			cmd.command = ISDN_STAT_BCONN;
			cmd.arg = chan->No;
			strcpy(cmd.parm.num, "");
			ccard->interface.statcallb(&cmd);

			cmd.driver = ccard->myid;
			cmd.command = ISDN_STAT_FAXIND;
			cmd.arg = chan->No;
			chan->fax->r_code = ISDN_TTY_FAX_FCON;
			ccard->interface.statcallb(&cmd);

			cmd.driver = ccard->myid;
			cmd.command = ISDN_STAT_FAXIND;
			cmd.arg = chan->No;
			chan->fax->r_code = ISDN_TTY_FAX_RID;
			ccard->interface.statcallb(&cmd);

			cmd.driver = ccard->myid;
			cmd.command = ISDN_STAT_FAXIND;
			cmd.arg = chan->No;
			chan->fax->r_code = ISDN_TTY_FAX_DIS;
			ccard->interface.statcallb(&cmd);