FreeCalypso > hg > fc-tourmaline
diff src/g23m-gsm/alr2/alr_cbch.c @ 2:3a14ee9a9843
src/g23m-gsm: same alr2 & alr3 structure as in Selenite
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 16 Oct 2020 06:29:12 +0000 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/g23m-gsm/alr2/alr_cbch.c Fri Oct 16 06:29:12 2020 +0000 @@ -0,0 +1,2177 @@ +/* ++----------------------------------------------------------------------------- +| Project : GSM-PS +| Modul : ALR_CBCH ++----------------------------------------------------------------------------- +| Copyright 2002 Texas Instruments Berlin, AG +| All rights reserved. +| +| This file is confidential and a trade secret of Texas +| Instruments Berlin, AG +| The receipt of or possession of this file does not convey +| any rights to reproduce or disclose its contents or to +| manufacture, use, or sell anything it may describe, in +| whole, or in part, without the specific written consent of +| Texas Instruments Berlin, AG. ++----------------------------------------------------------------------------- +| Purpose : This Modul defines the SDL process CBCH_control. ++----------------------------------------------------------------------------- +*/ + +#ifndef ALR_CBCH_C +#define ALR_CBCH_C + +#define ENTITY_PL + +/*==== INCLUDES ===================================================*/ +#include <string.h> +#include <stdlib.h> +#include <ctype.h> +#include "typedefs.h" +#include "pconst.cdg" +#include "mconst.cdg" +#include "message.h" +#include "ccdapi.h" +#include "vsi.h" +#include "custom.h" +#include "gsm.h" +#include "prim.h" +#include "cnf_alr.h" +#include "mon_alr.h" +#include "pei.h" +#include "tok.h" + +#include "pcm.h" +#ifdef GPRS +#include "alr_gprs.h" +#endif +#include "alr.h" +#include "alr_em.h" + +/*==== EXPORT =====================================================*/ +/*==== PRIVAT =====================================================*/ +LOCAL void cb_read_cbch (UBYTE flags); +LOCAL void cb_check_ci_lai_plmn (void); +LOCAL void cb_remove_message (USHORT i); +LOCAL void cb_first_block (UBYTE status); +LOCAL UBYTE* cb_create_schedule_entries (UBYTE* msg_ptr, BOOL read_old_msg); +LOCAL void cb_create_schedule_map (UBYTE old_cb_msg); +LOCAL UBYTE cb_check_old_msg (void); +LOCAL UBYTE cb_check_data_coding_scheme(UBYTE dcs_id); +LOCAL UBYTE cb_check_message_id (USHORT msg_id); +LOCAL void cb_store_cbch_msg (void); +LOCAL void cb_error_ind (void); +LOCAL void cb_cbch_message (UBYTE length); +LOCAL void cb_null_message (void); +LOCAL void cb_schedule_message (void); +LOCAL void cb_next_scheduled_msg (void); +LOCAL UBYTE cb_sat_check_message_id (USHORT msg_id); +LOCAL void cb_sat_cbch_message (UBYTE length); +LOCAL void cb_stop_next_blocks (void); +LOCAL void cb_read_next_3_blocks(void); +void set_cbch_state( UBYTE extended, UBYTE new_state); +UBYTE get_cbch_state( UBYTE extended); + +#if defined(FF_HOMEZONE) +LOCAL UBYTE cb_check_homezone (UBYTE length); +#endif /* FF_HOMEZONE */ + +/* + * support indication of geographical scope change to MMI + * it is important that these defitions match the GS definition from GSM 03.41 + * the MMI uses this also to compare with real CBCH messages! + */ +#define CB_GEOGR_CHANGE_NONE 0x00 +#define CB_GEOGR_CHANGE_CELL 0xC0 +#define CB_GEOGR_CHANGE_LAC 0x80 +#define CB_GEOGR_CHANGE_PLMN 0x40 + +#define CB_GEOGR_SCOPE_CELLI 0x00 +#define CB_GEOGR_SCOPE_PLMN 0x01 +#define CB_GEOGR_SCOPE_LAC 0x02 +#define CB_GEOGR_SCOPE_CELLN 0x03 + +#define CBCH_NO_MSG 0 +#define CBCH_NORM_MSG 1 +#define CBCH_SCHEDULE_MSG 2 +#define CBCH_SAT_MSG 3 +#define CBCH_LAST_BLOCK 0x10 + +#define CBCH_BLOCK_0 0 +#define CBCH_BLOCK_1 1 +#define CBCH_BLOCK_2 2 +#define CBCH_BLOCK_3 3 +#define CBCH_FIRST_SCHED_MSG 8 +#define CBCH_NULL_MSG 0x0F +#define CBCH_SCHED 2 + +#define MAX_UPDATE_NO 16 +#define MAX_UPDATE_NO_DIFF 8 + +#if 1 || defined (WIN32) +#define TRACING +#endif + +#define CB_SERIAL_NO(ph) ((USHORT)\ + ((((T_CBMSG_HEADER*)(ph))->serial_no1)<<8)+\ + (((T_CBMSG_HEADER*)(ph))->serial_no2)) + +#define CB_GS_CODE(ph) (((UBYTE)(((T_CBMSG_HEADER*)(ph))->serial_no1))>>6) + +#define CB_MSG_CODE(ph) ((USHORT)\ + (((((T_CBMSG_HEADER*)(ph))->serial_no1)&0x3f)<<4)+\ + ((((T_CBMSG_HEADER*)(ph))->serial_no2)>>4)) + +#define CB_UPDATE_NO(ph) ((((T_CBMSG_HEADER*)(ph))->serial_no2)&0x0f) + +#define CB_MESSAGE_ID(ph) ((USHORT)\ + ((((T_CBMSG_HEADER*)(ph))->msg_id3)<<8)+\ + (((T_CBMSG_HEADER*)(ph))->msg_id4)) +#if 0 +#define CB_MESSAGE_ID(ph) ((((USHORT)(((T_CBMSG_HEADER*)(ph))->msg_id3))<<8)+\ + ((USHORT)(((T_CBMSG_HEADER*)(ph))->msg_id4))) + +#endif /* 0 */ +#define CB_DCS(ph) (((T_CBMSG_HEADER*)(ph))->dcs) + +#define CB_PAGE(ph) (((T_CBMSG_HEADER*)(ph))->page>>4) +#define CB_PAGETOTAL(ph) (((T_CBMSG_HEADER*)(ph))->page&0x0f) + + +#if defined (TRACING) +#define ALR_TRACE_CB(a) TRACE_EVENT("CBCH: " a) +#define ALR_TRACE_CB_MODUS(m) TRACE_EVENT_P1("CBCH: modus=%d", m) +#define ALR_TRACE_CB_ERROR(e) TRACE_EVENT_P1("CBCH: error=%d", e) +#define ALR_TRACE_CB_BLOCK_NO(b) TRACE_EVENT_P2("CBCH: block=%02x no=%u", b, b&0x0f) +#define ALR_TRACE_CB_MSGHEAD(ph) if (CB_MSG_CODE(ph) < 1000) {\ + TRACE_EVENT_P7("CBCH ID=%3u, gs=%u, msg=%4u, upd=%u, dcs=%02x, p=%u/%u",\ + CB_MESSAGE_ID(ph), CB_GS_CODE(ph), \ + CB_MSG_CODE(ph), CB_UPDATE_NO(ph), \ + CB_DCS(ph), CB_PAGE(ph), CB_PAGETOTAL(ph));\ + }else{\ + TRACE_EVENT_P7("CBCH ID=%3u, gs=%u, msg=%04x, upd=%u, dcs=%02x, p=%u/%u",\ + CB_MESSAGE_ID(ph), CB_GS_CODE(ph), \ + CB_MSG_CODE(ph), CB_UPDATE_NO(ph), \ + CB_DCS(ph), CB_PAGE(ph), CB_PAGETOTAL(ph));\ + } + +#define ALR_TRACE_CB_MSGID(m) TRACE_EVENT_P1("CBCH: ID=%u", m) +#define ALR_TRACE_CB_START_READ(f) TRACE_EVENT_P1("CBCH: Start Read %d", f) +#define ALR_TRACE_CB_SCHEDULE(a1,a2) TRACE_EVENT_P2("CBCH: schedule i=%d result=%d", a1,a2) +#define ALR_TRACE_CB_HZREQ(a1,a2) TRACE_EVENT_P2("CBCH: Homezone ID=%u, t=%u", a1,a2) +#define ALR_TRACE_CB_SCOPE_CHANGE(i,s) TRACE_EVENT_P2 ("CBCH: Geogr. scope change %u, deleting msg of scope %u",\ + i,s); +#else /* TRACING */ +#define ALR_TRACE_CB(a) +#define ALR_TRACE_CB_MODUS(m) +#define ALR_TRACE_CB_ERROR(e) +#define ALR_TRACE_CB_BLOCK_NO(b) +#define ALR_TRACE_CB_MSGID(m) +#define ALR_TRACE_CB_START_READ(f) +#define ALR_TRACE_CB_SCHEDULE(a1,a2) +#define ALR_TRACE_CB_HZREQ(a1,a2) +#endif /* TRACING */ + +/*==== VARIABLES ==================================================*/ +/*==== FUNCTIONS ==================================================*/ + +#if 0 +#if 0 +#define TRACE_ALIGN_P(ps,m,t) TRACE_EVENT_P5(" %08x %3u.%u %08x=%u " \ + "T_" #t " " #m, \ + (BYTE*)&(m), (BYTE*)&(m)-(BYTE*)ps, \ + sizeof (m), + sizeof (m) > 1 ? (USHORT)(m) : (UBYTE)(m), m \ + ) +#else +#define TRACE_ALIGN_P(ps,m,t) TRACE_EVENT_P4 (" %08x %3u.%u %08x " \ + "T_" #t " " #m, \ + (BYTE*)&(m), (BYTE*)&(m)-(BYTE*)ps, \ + sizeof (m), m\ + ) +#endif +int test_alignment (T_CBMSG_HEADER *ph) +{ + TRACE_ALIGN_P (ph, ph->serial_no1, CBMSG_HEADER); + TRACE_ALIGN_P (ph, ph->serial_no2, CBMSG_HEADER); + TRACE_ALIGN_P (ph, ph->msg_id3, CBMSG_HEADER); + TRACE_ALIGN_P (ph, ph->msg_id4, CBMSG_HEADER); + TRACE_ALIGN_P (ph, ph->dcs, CBMSG_HEADER); + TRACE_ALIGN_P (ph, ph->page, CBMSG_HEADER); +} +#endif + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_init | ++--------------------------------------------------------------------+ + + PURPOSE : Initialize CBCH Control Process. +*/ + +GLOBAL void cb_init (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + ALR_TRACE_CB ("cb_init()"); + alr_data->state[STATE_NORMAL_CBCH] = CBCH_NULL; + alr_data->state[STATE_EXT_CBCH] = CBCH_NULL; + pcbch->modus = NOT_PRESENT_8BIT; + pcbch->old_cbch_msg.cnt = 0; +#if defined(FF_HOMEZONE) + pcbch->homezone = CBCH_HZ_OFF; + pcbch->hz_timeout = 0; +#endif /* FF_HOMEZONE */ +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_stop | ++--------------------------------------------------------------------+ + + PURPOSE : Stop CBCH Control Process. +*/ + +GLOBAL void cb_stop (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE normal_cbch, extended_cbch; + + normal_cbch = GET_STATE(STATE_NORMAL_CBCH); + extended_cbch = GET_STATE(STATE_EXT_CBCH); + +#if defined(FF_HOMEZONE) + if (pcbch->homezone EQ CBCH_HZ_PENDING) + return; /* donīt stop if homezone request is pending */ +#endif /* FF_HOMEZONE */ + + if ( + (normal_cbch NEQ CBCH_NULL AND normal_cbch NEQ CBCH_IDLE) + OR + (extended_cbch NEQ CBCH_NULL AND extended_cbch NEQ CBCH_IDLE) + ) + { + /* + * if CBCH process is really active, initialize + * CBCH process and stop CBCH process in layer 1. + */ + pcbch->msg_type = CBCH_NO_MSG; + + SET_STATE(STATE_NORMAL_CBCH, CBCH_IDLE); + SET_STATE(STATE_EXT_CBCH, CBCH_IDLE); + + ALR_EM_STOP_CBCH_READING; + + ma_cb_stop_cbch_req(); + } +} + + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_start | ++--------------------------------------------------------------------+ + + PURPOSE : Re-configure layer 1 and go back to CBCH reading without + scheduling information. +*/ + +LOCAL void cb_start_no_drx_reading (UBYTE config) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + if (config) + { + /* + * configure layer 1 + */ + PALLOC (config_cbch, MPHC_CONFIG_CBCH_REQ); + + /* + * copy the stored configuration received earlier from RR and send to layer 1. + */ + memcpy (config_cbch, &pcbch->mphc_config_cbch, sizeof (T_MPHC_CONFIG_CBCH_REQ)); + ma_cb_config_cbch(config_cbch); + } + + /* + * start reading in layer 1 for normal and extended CBCH. + * The initial mode is no Scheduling information available. + */ + cb_read_cbch (CBCH_NO_SCHED | CBCH_READ_NORM); + cb_read_cbch (CBCH_NO_SCHED | CBCH_READ_EXT); + + SET_STATE(STATE_NORMAL_CBCH, CBCH_NO_DRX); + SET_STATE(STATE_EXT_CBCH, CBCH_NO_DRX); + +#if defined(FF_HOMEZONE) + if (pcbch->homezone EQ CBCH_HZ_IDLE) + { + pcbch->homezone = CBCH_HZ_PENDING; + /* start timer new */ + if (pcbch->hz_timeout) + TIMERSTART(TIM_HOMEZONE, pcbch->hz_timeout); + ALR_TRACE_CB ("HOMEZONE is pending"); + } +#endif /* FF_HOMEZONE */ +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_start | ++--------------------------------------------------------------------+ + + PURPOSE : Start CBCH Control Process. +*/ + +GLOBAL void cb_start (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + if ( (GET_STATE(STATE_NORMAL_CBCH) EQ CBCH_IDLE) + AND ( (pcbch->modus NEQ NOT_PRESENT_8BIT) + OR (pcbch->sat_enabled) +#if defined(FF_HOMEZONE) + OR (pcbch->homezone EQ CBCH_HZ_IDLE) +#endif /* FF_HOMEZONE */ + ) + ) + { + /* + * if a definition of needed message identifiers + * and data coding schemes is available, then configure + * layer 1 + */ + ALR_TRACE_CB ("restart"); + cb_start_no_drx_reading (TRUE); + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : TIL_CBCH | +| STATE : code ROUTINE : cb_mph_cbch_req | ++--------------------------------------------------------------------+ + + PURPOSE : Configuration of the layer 1 process for CBCH. + + The compile-switch is not defined with the standard TI-layer 1. + + But there shall be a little modification possible (and it is + done by some source code customer of layer 1), which does not + need any storing in ALR. Then the compile switch must be set + + REMARK : Setting of compile switch has problems with function cbch_start ??? + +*/ + +GLOBAL void cb_mph_cbch_req (T_cbch * cbch) +{ + USHORT i; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + T_cbch_desc *pcbch_desc = &pcbch->mphc_config_cbch.cbch_desc; + T_chan_sel *pchan_sel = &pcbch_desc->chan_sel; + T_cbch_freq_list *pcbch_freq_list = &pcbch->mphc_config_cbch.cbch_freq_list; + + ALR_TRACE_CB ("MPH_CBCH_REQ"); + + ALR_EM_CONFIGURE_CBCH_CHANNEL; + +#if defined(FF_HOMEZONE) + if (pcbch->homezone NEQ CBCH_HZ_OFF) + pcbch->homezone = CBCH_HZ_IDLE; /* starts HZ request again */ +#endif /* FF_HOMEZONE */ + + /* check which messages have to be deleted + * even if the new cell has CBCH disabled! We still need to + * to delete the corresponding messages and inform the MMI! + */ + if (pcbch->modus EQ CBCH_ACCEPT) + cb_check_ci_lai_plmn (); + + if (cbch->stat EQ STAT_ACT) + { + /* + * A CBCH channel is available + */ + +#if !defined (L1_STORES_CBCH_CONFIG) + /* + * Layer 1 does not store any CBCH configuration (default) + * first set the channel configuration + */ + if (cbch->h EQ H_FREQ) + { + /* + * with frequency hopping, set hopping flag, maio, hsn and hopping list. + */ + pchan_sel->h = HOPPING; + pchan_sel->rf_channel.maio = cbch->maio; + pchan_sel->rf_channel.hsn = cbch->hsn; + + i=0; + pcbch_freq_list->rf_chan_cnt=0; + while ((i < 64) AND (cbch->ma[i] NEQ NOT_PRESENT_16BIT)) + { + pcbch_freq_list->rf_chan_no.radio_freq[i] = ARFCN_TO_L1(cbch->ma[i]); + i++; + pcbch_freq_list->rf_chan_cnt++; + } + } + else + { + /* + * Layer 1 uses a union definition. This is not applicable for the Condat-SAP model. + * Therefore the rf channel number is configured by maio and hsn. In general a Avoid the union !!! + */ + pchan_sel->h = NO_HOPPING; + pchan_sel->rf_channel.maio = (UBYTE)(ARFCN_TO_L1(cbch->arfcn) & 0xFF); + pchan_sel->rf_channel.hsn = (UBYTE)((ARFCN_TO_L1(cbch->arfcn) >> 8) & 0xFF); + memset (pcbch_freq_list, 0, sizeof (T_cbch_freq_list)); + } + + /* + * configure the CBCH channel type (SDCCH/8 or SDCCH/4) + */ + if (cbch->ch < CH_SDCCH_8_0) + pcbch_desc->channel_type = CH_SDCCH_4; + else + pcbch_desc->channel_type = CH_SDCCH_8; + + pcbch_desc->sub_channel = 0; /* not relevant */ + pcbch_desc->timeslot_no = cbch->tn; + pcbch_desc->tsc = cbch->tsc; + +#else + /* + * Compile option set: L1 stores actual CBCH configuration. + * So it is not necessary to store the configuration in ALR. + * Just parse the configuration to Layer 1. + */ + { + PALLOC (config_cbch, MPHC_CONFIG_CBCH); + + if (cbch->h EQ H_FREQ) + { + /* + * with frequency hopping, set hopping flag, maio, hsn and hopping list. + */ + config_cbch->cbch_desc.chan_sel.h = HOPPING; + config_cbch->cbch_desc.chan_sel.rf_channel.maio = cbch->maio; + config_cbch->cbch_desc.chan_sel.rf_channel.hsn = cbch->hsn; + + i=0; + config_cbch->cbch_freq_list.rf_chan_cnt=0; + while (cbch->ma[i] NEQ NOT_PRESENT_16BIT AND i < 64) + { + config_cbch->cbch_freq_list.rf_chan_no.hop_chan[i] = ARFCN_TO_L1(cbch->ma[i]); + i++; config_cbch->cbch_freq_list.rf_chan_cnt++; + } + } + else + { + /* + * Layer 1 uses a union definition. This is not applicable for the Condat-SAP model. + * Therefore the rf channel number is configured by maio and hsn. In general a Avoid the union !!! + */ + config_cbch->cbch_desc.chan_sel.h = NO_HOPPING; + config_cbch->cbch_desc.chan_sel.rf_channel.maio = ARFCN_TO_L1(cbch->arfcn) & 0xFF; + config_cbch->cbch_desc.chan_sel.rf_channel.hsn = (ARFCN_TO_L1(cbch->arfcn) >> 8) & 0xFF; + memset (&config_cbch->cbch_freq_list, 0, sizeof (T_cbch_freq_list)); + } + + /* + * configure the CBCH channel type (SDCCH/8 or SDCCH/4) + */ + if (cbch->ch < CH_SDCCH_8_0) + config_cbch->cbch_desc.channel_type = CH_SDCCH_4; + else + config_cbch->cbch_desc.channel_type = CH_SDCCH_8; + + config_cbch->cbch_desc.sub_channel = 0; /* not relevant */ + config_cbch->cbch_desc.timeslot_no = cbch->tn; + config_cbch->cbch_desc.tsc = cbch->tsc; + + ma_cb_config_cbch(config_cbch); + } +#endif + + if ( (pcbch->modus NEQ NOT_PRESENT_8BIT) + OR (pcbch->sat_enabled) +#if defined(FF_HOMEZONE) + OR (pcbch->homezone EQ CBCH_HZ_IDLE) +#endif /* FF_HOMEZONE */ + ) + { + /* + * MMI has requested data + * Start with NO_DRX mode + * Read each first CBCH block + */ +#if defined (L1_STORES_CBCH_CONFIG) + cb_start_no_drx_reading (FALSE); +#else /* L1_STORES_CBCH_CONFIG */ + ALR_TRACE_CB ("switch on, send config"); + cb_start_no_drx_reading (TRUE); +#endif /* L1_STORES_CBCH_CONFIG */ + } + else + { + UBYTE *si3 = &alr_data->ma_data.sys_info_3[0]; + UBYTE *lac = &alr_data->cbch_data.old_cid_plmn_lac[0]; + + ALR_TRACE_CB ("switch on, wait for MMI"); + /* + * wait for MMI request + */ + SET_STATE(STATE_NORMAL_CBCH, CBCH_IDLE); + SET_STATE(STATE_EXT_CBCH, CBCH_IDLE); + /* + * update old_cid_plmn_lac + */ + memcpy (lac, &si3[2], 7); + } + } + else + { + /* + * The new configuration indicates no CBCH, so stop the CBCH process in Layer 1 + */ + ALR_TRACE_CB ("switch off"); + + cb_stop(); + SET_STATE(STATE_NORMAL_CBCH, CBCH_NULL); + SET_STATE(STATE_EXT_CBCH, CBCH_NULL); + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : AKR_CBCH | +| STATE : code ROUTINE : cb_mmi_cbch_req | ++--------------------------------------------------------------------+ + + PURPOSE : MMI sends a definition of the expected message identifier + and data coding schemes for the CBCH messages. + +*/ + +GLOBAL void cb_mmi_cbch_req (T_MMI_CBCH_REQ *cbch) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + ALR_TRACE_CB ("MMI req"); + +#if defined(FF_HOMEZONE) + if (cbch->modus NEQ CBCH_HOMEZONE) + { + pcbch->modus = cbch->modus; + TRACE_EVENT_P1 ("CBCH: homezone=%u", pcbch->homezone); + } + else if (cbch->msg_id[0] EQ NOT_PRESENT_16BIT) + { + /* + * switch off automatically homezone request + * - homezone state to off + * - clear old message + * - stop timer + */ + pcbch->msg_hz_id = NOT_PRESENT_16BIT; + pcbch->homezone = CBCH_HZ_OFF; + TIMERSTOP (TIM_HOMEZONE); + } + else + { + /* + * switch on automatically homezone request + * - set homezone state to idle whatever are before + * - set new homezone id + * - clear old message + */ + pcbch->msg_hz_id = cbch->msg_id[0]; + pcbch->dcs_hz_id = cbch->dcs_id[0]; + pcbch->hz_timeout = cbch->dcs_id[1]*1000; + ALR_TRACE_CB_HZREQ (pcbch->msg_hz_id, + pcbch->hz_timeout); + if (pcbch->homezone EQ CBCH_HZ_OFF) + { + UBYTE cbch_state = GET_STATE (STATE_NORMAL_CBCH); + pcbch->homezone = CBCH_HZ_IDLE; + if (cbch_state NEQ CBCH_NULL) + {/* CBCH system is prepared */ + if (cbch_state EQ CBCH_IDLE) + { /* start timer only if CBCH system is prepared */ + TIMERSTART (TIM_HOMEZONE, 1000); + } + else + { /* CBCH system is already active -> wait for HZ message */ + pcbch->homezone = CBCH_HZ_PENDING; + TIMERSTART (TIM_HOMEZONE, pcbch->hz_timeout); + ALR_TRACE_CB ("HOMEZONE is pending"); + } + } + } + return; + } +#else /* FF_HOMEZONE */ + pcbch->modus = cbch->modus; +#endif /* FF_HOMEZONE */ + /* + * Storing of Parameter and clearing of + * the received CB memory + */ + memcpy (&pcbch->msg_id[0], cbch->msg_id, sizeof (pcbch->msg_id)); + memcpy (&pcbch->dcs_id[0], cbch->dcs_id, sizeof (pcbch->dcs_id)); + +#if !defined(NTRACE) +{ + int i; + + ALR_TRACE_CB_MODUS(cbch->modus); + + for (i=0; + (i < MAX_IDENTS) AND (pcbch->msg_id[i] NEQ NOT_PRESENT_16BIT); + i++) + { + TRACE_EVENT_P2 ("CBCH: id[%u]=%u", i, pcbch->msg_id[i]); + } + for (i=0; + (i < MAX_IDENTS) AND (pcbch->dcs_id[i] NEQ NOT_PRESENT_8BIT); + i++) + { + TRACE_EVENT_P2 ("CBCH:dcs[%u]=%u", i, pcbch->dcs_id[i]); + } +} +#endif /* !NTRACE */ + + /* old messages should only be erased when MMI turns CBCH off */ + if (pcbch->modus EQ MMI_CBCH_STOP) + { + /* also erases the count of old message */ + memset (&pcbch->old_cbch_msg, 0, sizeof (T_CB_MSG)); + memset (&pcbch->msg[0], 0, CBCH_MSG_SIZE); + } + + /* + TRACE_EVENT_P2 ("CBCH: STATE_MA=%u STATE_CBCH=%u", GET_STATE(STATE_MA), GET_STATE (STATE_CBCH)); + */ + +#ifdef GPRS + if ((GET_STATE(STATE_MA) EQ MA_IDLE AND !alr_data->gprs_data.pbcch) OR + (alr_data->gprs_data.pbcch AND alr_data->gprs_data.pim)) +#else + if (GET_STATE(STATE_MA) EQ MA_IDLE) +#endif + { + /* + * layer 1 is only configured, if ALR is in idle state, else the configuration + * is delayed until the cell is selected. + */ + switch (GET_STATE (STATE_NORMAL_CBCH)) + { + case CBCH_NULL: + /* + * no CBCH channel is available + */ + break; + + case CBCH_IDLE: + if (pcbch->modus EQ MMI_CBCH_STOP AND + !pcbch->sat_enabled) + { + /* + * CBCH download is not enabled and the MMI indicates stop of + * the CBCH channel, then stop CBCH process in layer 1. + */ + cb_stop(); + } + else + { + /* + * new definitions of message identifier or data coding schemes + * then re-configure layer 1 and go back to CBCH reading without + * scheduling information. + */ + cb_start_no_drx_reading (TRUE); + } + break; + + default: + /* + * we already received a MMI CBCH REQ before + */ + if (pcbch->modus EQ MMI_CBCH_STOP AND + !pcbch->sat_enabled) + { + /* + * CBCH download is not enabled and the MMI indicates stop of + * the CBCH channel, then stop CBCH process in layer 1. + */ + cb_stop(); + SET_STATE(STATE_NORMAL_CBCH, CBCH_IDLE); + SET_STATE(STATE_EXT_CBCH, CBCH_IDLE); + } + break; + } + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : TIL_CBCH | +| STATE : code ROUTINE : cb_mmi_sat_cbch_req | ++--------------------------------------------------------------------+ + + PURPOSE : Reception of a list of identifiers for SIM TOOLKIT + CBCH Download. + +*/ + +GLOBAL void cb_mmi_sat_cbch_req (T_MMI_SAT_CBCH_DWNLD_REQ * cbch_req) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + ALR_TRACE_CB ("MMI SAT req"); + + /* + * clear the list of needed message identifier for CBCH download + * and fill it with the definiton of MMI. + */ + memset (pcbch->msg_id_sat, NOT_PRESENT_16BIT, + sizeof(pcbch->msg_id_sat)); + memcpy (pcbch->msg_id_sat, cbch_req->msg_id, + sizeof(cbch_req->msg_id[0])*(cbch_req->count)); + + /* + * CBCH download is enabled + */ + pcbch->sat_enabled = 1; + + switch (GET_STATE (STATE_NORMAL_CBCH)) + { + case CBCH_NULL: + /* + * No CBCH channel is available. + */ + break; + + default: + { + /* + * configure layer 1 for catching the CBCH download messages + */ + PALLOC (config_cbch, MPHC_CONFIG_CBCH_REQ); + memcpy (config_cbch, &pcbch->mphc_config_cbch, sizeof (T_MPHC_CONFIG_CBCH_REQ)); + ma_cb_config_cbch(config_cbch); + cb_read_cbch (CBCH_NO_SCHED | CBCH_READ_NORM); + cb_read_cbch (CBCH_NO_SCHED | CBCH_READ_EXT); + SET_STATE(STATE_NORMAL_CBCH, CBCH_NO_DRX); + SET_STATE(STATE_EXT_CBCH, CBCH_NO_DRX); + } + break; + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : TIL_CBCH | +| STATE : code ROUTINE : cb_data_ind | ++--------------------------------------------------------------------+ + + PURPOSE : A CBCH message is received. + +*/ + +GLOBAL void cb_data_ind (T_MPHC_DATA_IND *cbch_ind) +{ + UBYTE block_no; + UBYTE block_description; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE * expected_seq_number = &(pcbch->expected_seq_number[0]); + + /* + * check whether the CBCH message has been received on the + * normal CBCH channel or the extended CBCH channel + */ + if (cbch_ind->tc >= 4) + { + pcbch->msg_is_extended = CBCH_READ_EXT; + expected_seq_number = &(pcbch->expected_seq_number[1]); + } + else if(cbch_ind->tc < 4) + pcbch->msg_is_extended = CBCH_READ_NORM; + + if (cbch_ind->error_flag EQ VALID_BLOCK) + { + /* + * if the CBCH block is valid, calculate the block number + */ + block_description = cbch_ind->l2_frame.content[0]; + block_no = (UBYTE)(block_description & 0x0F); + if (block_no < CBCH_NULL_MSG) + { + ALR_TRACE_CB_BLOCK_NO (block_description); + } + TRACE_EVENT_P2("expected_block_number = %d, schedule_length =%d", (*expected_seq_number), pcbch->schedule_length[0]); + switch(block_no) + { + case CBCH_BLOCK_0: + memcpy (&pcbch->msg[0], &cbch_ind->l2_frame.content[1], CBCH_BLOCK_SIZE); +#if defined(FF_HOMEZONE) + if (!cb_check_homezone ((UBYTE)(CBCH_BLOCK_SIZE*(block_no+1)))) +#endif /* FF_HOMEZONE */ + cb_first_block(block_description); + break; + + case CBCH_BLOCK_1: + case CBCH_BLOCK_2: + case CBCH_BLOCK_3: + /* + * check for sequence number + */ + if(*expected_seq_number NEQ block_no) + { + ALR_TRACE_CB("Sequence error"); + cb_error_ind(); + } + else + { + memcpy (&pcbch->msg[CBCH_BLOCK_SIZE*(block_no & 3)], + &cbch_ind->l2_frame.content[1], CBCH_BLOCK_SIZE); + + (*expected_seq_number)++; + if( *expected_seq_number > CBCH_BLOCK_3 ) + *expected_seq_number = CBCH_BLOCK_0; + + + if ( (block_description & CBCH_LAST_BLOCK) OR (block_no EQ CBCH_BLOCK_3) ) + { + /* + * last block of msg + */ + if(pcbch->msg_type EQ CBCH_NORM_MSG) + /* + * +1, because parameter is length not offset + */ + cb_cbch_message((UBYTE)(CBCH_BLOCK_SIZE*(block_no+1))); + else if(pcbch->msg_type EQ CBCH_SCHEDULE_MSG) + cb_schedule_message(); + else if(pcbch->msg_type EQ CBCH_SAT_MSG) + cb_sat_cbch_message((UBYTE)(CBCH_BLOCK_SIZE*(block_no+1))); + } + } + break; + + case CBCH_FIRST_SCHED_MSG: + /* + * first SCHEDULE block + */ + + ALR_TRACE_CB ("SCHEDULE"); + memcpy (&pcbch->msg[0], &cbch_ind->l2_frame.content[1], CBCH_BLOCK_SIZE); + cb_read_next_3_blocks(); + + pcbch->msg_type = CBCH_SCHEDULE_MSG; + break; + + case CBCH_NULL_MSG: + /* + * NULL Message + */ + + /* + ALR_TRACE_CB ("null msg"); + */ + cb_null_message (); + break; + + default: + ALR_TRACE_CB ("unknown"); + cb_error_ind(); + break; + } + + ALR_EM_RECEIVE_CBCH_MESSAGE; + + } + else + { + /* + * Invalid block + */ + /* + ALR_TRACE_CB_ERROR(cbch_ind->error_flag); + */ + + pcbch->msg_type = CBCH_NO_MSG; + cb_error_ind (); + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_first_block | ++--------------------------------------------------------------------+ + + PURPOSE : Reception of the first CBCH block. + +*/ + +LOCAL void cb_first_block (UBYTE status) +{ + UBYTE result; + T_CBMSG_HEADER *p_cbh; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + /* + * extract message id and data coding scheme from the message + */ + p_cbh = (T_CBMSG_HEADER*)(&pcbch->msg[0]); + + ALR_TRACE_CB_MSGHEAD (p_cbh); + + /* + * check the incoming message: + * 1. matches the message identifier + * 2. matches the data coding scheme + * 3. is this message not received yet + */ + result = cb_check_message_id (CB_MESSAGE_ID(p_cbh)); + result += cb_check_data_coding_scheme (CB_DCS(p_cbh)); + result += cb_check_old_msg (); + + if (result EQ 3) + { + /* + * all checks are passed + */ + if (! pcbch->sat_enabled OR + ! cb_sat_check_message_id(CB_MESSAGE_ID(p_cbh))) + { + /* + * it is not a CBCH download message or + * CBCH download is not enabled + */ + if (status & CBCH_LAST_BLOCK) + { + /* + * the first is the only block, then forward it + * to MMI. + */ + cb_cbch_message (CBCH_BLOCK_SIZE*(CBCH_BLOCK_0+1)); + } + else + { + /* + * store the block and request the three remaining + * blocks in layer 1. + */ + pcbch->msg_type = CBCH_NORM_MSG; + cb_read_next_3_blocks(); + } + } + else + { + /* + * It is a CBCH download message and CBCH download is enabled. + */ + if (status & CBCH_LAST_BLOCK) + { + /* + * the first block is the only block, so forward the + * message to MMI. + */ + cb_sat_cbch_message (CBCH_BLOCK_SIZE*(CBCH_BLOCK_0+1)); + } + else + { + /* + * store the data and request the three remaining blocks. + */ + pcbch->msg_type = CBCH_SAT_MSG; + cb_read_next_3_blocks(); + } + } + } + else + { + /* + * the message has not passed the checks. + * So it can be only a CBCH download message. + */ + if(! pcbch->sat_enabled OR + ! cb_sat_check_message_id(CB_MESSAGE_ID(p_cbh))) + { + /* + * SAT is not enabled or it is not a CBCH download + * message. So start reading of next scheduled message. + */ + memset (&pcbch->msg[0], 0, 88); + cb_next_scheduled_msg(); + + } + else + { + /* + * it is CBCH download message and SAT is enabled + */ + if (status & CBCH_LAST_BLOCK) + { + /* + * the first block is the last one, so send the + * message to MMI. + */ + cb_sat_cbch_message (CBCH_BLOCK_SIZE*(CBCH_BLOCK_0+1)); + } + else + { + /* + * store the first block and request the remaining three. + */ + pcbch->msg_type = CBCH_SAT_MSG; + cb_read_next_3_blocks(); + } + } + } +} + + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : TIL_CBCH | +| STATE : code ROUTINE : cb_sat_cbch_message | ++--------------------------------------------------------------------+ + + PURPOSE : Reception of a complete CBCH message for CBCH download. + +*/ + +LOCAL void cb_sat_cbch_message (UBYTE length) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + PALLOC (mmi_cbch_ind, MMI_SAT_CBCH_DWNLD_IND); + + ALR_EM_CBCH_MESSAGE_COMPLETE; + + TRACE_FUNCTION ("cb_sat_cbch_message()"); + + /* + * copy the content of the message into the primitive. + */ + memcpy (mmi_cbch_ind->cbch_msg, pcbch->msg, 88); + mmi_cbch_ind->cbch_len = length; + + /* + * send to MMI + */ + PSENDX(MMI, mmi_cbch_ind); + + /* + * prepare for next reception + */ + pcbch->msg_type = CBCH_NO_MSG; + pcbch->expected_seq_number[0] = CBCH_BLOCK_0; + pcbch->expected_seq_number[1] = CBCH_BLOCK_0; + /* + * start reading of next scheduled message. + */ + cb_next_scheduled_msg(); +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : TIL_CBCH | +| STATE : code ROUTINE : cb_schedule_message | ++--------------------------------------------------------------------+ + + PURPOSE : Reception of a SCHEDULE message. + +*/ + +LOCAL void cb_schedule_message (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + UBYTE *p_sched_msg = &pcbch->scheduled_sched_msg[extended]; + + ALR_EM_RECEIVE_SCHEDULE_MESSAGE; + + switch ( get_cbch_state(extended) ) + { + case CBCH_NO_DRX: + /* + * change from NO DRX mode (no knowledge about Scheduling) + * to DRX mode. + */ + + set_cbch_state (extended, CBCH_DRX); + + + /* + * check whether it is a scheduled schedule message or not. + */ + if(pcbch->msg[0] EQ 1) + *p_sched_msg = 1; + else + *p_sched_msg = 0; + + /* + * create schedule map with new and old messages + */ + cb_create_schedule_map (TRUE); + + /* + * forward the schedule map to layer 1. + */ + cb_read_cbch((UBYTE)(CBCH_SCHED | extended)); + + break; + + case CBCH_DRX: + if (pcbch->msg[0] EQ 1) + { + /* + * scheduled SCHEDULE message + */ + if(*p_sched_msg <= 2) + (*p_sched_msg)++; + + if (*p_sched_msg > 1) + /* + * we have read a full schedule period + * so we dont need to read the old messages + */ + cb_create_schedule_map (FALSE); + else + cb_create_schedule_map (TRUE); + + cb_read_cbch((UBYTE)(CBCH_SCHED | extended)); + } + break; + default: + break; + } + /* + * prepare for next reception + */ + pcbch->msg_type = CBCH_NO_MSG; + pcbch->expected_seq_number[0] = CBCH_BLOCK_0; + pcbch->expected_seq_number[1] = CBCH_BLOCK_0; +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_null_message | ++--------------------------------------------------------------------+ + + PURPOSE : Reception of a NULL message. + +*/ +LOCAL void cb_null_message (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + + ALR_EM_RECEIVE_NULL_MESSAGE; + + switch ( get_cbch_state(extended) ) + { + case CBCH_DRX: + if (pcbch->schedule_length[extended] EQ 0) + { + /* + * instead of the scheduled SCHEDULE message + * a NULL message has received. + * Restarting with NO DRX mode + */ + set_cbch_state (extended, CBCH_NO_DRX); + cb_read_cbch ((UBYTE)(CBCH_NO_SCHED | extended)); + } + else + { + cb_next_scheduled_msg(); + } + break; + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_error_ind | ++--------------------------------------------------------------------+ + + PURPOSE : Indicates an invalid block. + 1) with error_flag =TRUE + 2) invalid sequence number + 3) out of sequence block +*/ + +LOCAL void cb_error_ind (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + + if( pcbch->expected_seq_number[extended] NEQ CBCH_BLOCK_0) + { + /* + * stop the next blocks + */ + cb_stop_next_blocks(); + } + switch ( get_cbch_state(extended) ) + { + case CBCH_DRX: + if (pcbch->schedule_length[extended] EQ 0) + { + /* + * instead of the scheduled SCHEDULE message + * an invalid message has been received. + * Restarting with NO DRX mode + */ + set_cbch_state (extended, CBCH_NO_DRX); + cb_read_cbch ((UBYTE)(CBCH_NO_SCHED | extended)); + } + else + /* + * Go back to FIRST DRX mode. + */ + { + pcbch->scheduled_sched_msg[extended] = 1; + cb_next_scheduled_msg(); + } + break; + default: + break; + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_ind | ++--------------------------------------------------------------------+ + + PURPOSE : Indication of the CBCH message. + +*/ + +LOCAL void cb_ind (UBYTE length) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + PALLOC (mmi_cbch_ind, MMI_CBCH_IND); + + ALR_EM_CBCH_MESSAGE_COMPLETE; + + /* + * copy the message content to the primitive. + */ + memcpy (mmi_cbch_ind->cbch_msg, pcbch->msg, CBCH_MSG_SIZE); + mmi_cbch_ind->cbch_len = length; + + ma_cb_mmi_cbch_ind(mmi_cbch_ind); + + { + T_CBMSG_HEADER *p_cbh = (T_CBMSG_HEADER*)(&pcbch->msg[0]); + ALR_TRACE_CB_MSGHEAD (p_cbh); + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_read_next_3_blocks | ++--------------------------------------------------------------------+ + + PURPOSE : Starts read of next 3 blocks. + +*/ + +LOCAL void cb_read_next_3_blocks(void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + + if( extended EQ CBCH_READ_EXT) + ma_cb_info_req (CBCH_EXT_BLOCK234); + else + ma_cb_info_req (CBCH_NORM_BLOCK234); + + pcbch->expected_seq_number[extended] = CBCH_BLOCK_1; +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_stop_next_blocks | ++--------------------------------------------------------------------+ + + PURPOSE : Stop next blocks. + +*/ + +LOCAL void cb_stop_next_blocks (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + /* + * stop the next blocks + */ + + /* + * Upper layers / L1 Circuit Switched interfaces + * S922.doc , Ver 1.9 + * Section 11.3 MPHC_CBCH_INFO_REQ + * + * This message can be used to update on fly L1 + * with new tb_bitmap which then replaces the current one. + * In such a case, 0 in the bitmap means abort any pending reading of TB1/2/3 or TB5/6/7. + * + * A previous "schedule_length=0" is used to specify "No schedule present". + * In such a case, L1 starts reading continuously TB0 for normal CBCH or TB4 for Extended CBCH. + */ + ma_cb_info_req (0); + + pcbch->msg_type = CBCH_NO_MSG; + pcbch->expected_seq_number[0] = CBCH_BLOCK_0; + pcbch->expected_seq_number[1] = CBCH_BLOCK_0; +} + +#if defined(FF_HOMEZONE) && defined(INDICATE_HZ_ERROR) + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_ind_hz_err | ++--------------------------------------------------------------------+ + + PURPOSE : Indication of the CBCH message and stop the next blocks. + +*/ + +LOCAL void cb_ind_hz_err (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + PALLOC (mmi_cbch_ind, MMI_CBCH_IND); + + memset (mmi_cbch_ind->cbch_msg, 0xff, CBCH_MSG_SIZE); + mmi_cbch_ind->cbch_msg[2] = pcbch->msg_hz_id >> 8; + mmi_cbch_ind->cbch_msg[3] = pcbch->msg_hz_id & 0xff; + mmi_cbch_ind->cbch_len = 0; /* error indication */ + ALR_TRACE_CB ("cb_ind_hz_err()"); + + ma_cb_mmi_cbch_ind(mmi_cbch_ind); +} +#endif /* FF_HOMEZONE */ + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_cbch_message | ++--------------------------------------------------------------------+ + + PURPOSE : Reception of a complete CBCH message. + +*/ + +LOCAL void cb_cbch_message (UBYTE length) +{ + /* + * Indicate the message + */ + cb_ind (length); + /* + * stop the next blocks + */ + cb_stop_next_blocks (); + /* + * store the cbch message to avoid double reception + */ + cb_store_cbch_msg (); + /* + * start reading of the next scheduled message + */ + cb_next_scheduled_msg(); +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_store_cbch_msg | ++--------------------------------------------------------------------+ + + PURPOSE : Store key parameter of a CBCH message to avoid + forwarding of a CBCH message twice. + +*/ +LOCAL void cb_store_cbch_msg (void) +{ + USHORT x; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + ALR_TRACE_CB ("Store msg"); + + /* + * It is not permitted to save the cbch message, + * if the following pattern are in the + * lacation area identification (bcch:sys_info_3) : + * [4] 0x00 + * [5] 0xF1 + * [6] 0x10 + * + * that means FTA in testhouse + */ + if (alr_data->ma_data.sys_info_3[4] EQ 0 AND + alr_data->ma_data.sys_info_3[5] EQ 0xF1 AND + alr_data->ma_data.sys_info_3[6] EQ 0x10) + return; + + /* + * If storage is full, remove the first one. + */ + if (pcbch->old_cbch_msg.cnt EQ MAX_OLD_CB) + cb_remove_message (0); + + /* + * store the new one + */ + x = pcbch->old_cbch_msg.cnt++; + memcpy (&pcbch->old_cbch_msg.header[x], + &pcbch->msg, sizeof (T_CBMSG_HEADER)); +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_check_message_id | ++--------------------------------------------------------------------+ + + PURPOSE : Check Message Identifier of the first CBCH block. + +*/ + +LOCAL UBYTE cb_check_message_id (USHORT msg_id) +{ + USHORT i; + UBYTE result = TRUE; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + /* + * if no message identifier are defined for comparision + * make a shortcut and return immediately. + * MODUS CBCH_ACCEPT,but no msg_id defined,accept NO messages + * MODUS CBCH_IGNORE,but no msg_id define, accept all messages + * MODUS CBCH_STOP,but no msg_id defined, accept NO messages + * MODUS CBCH_HOMEZONE,but no msg_id defined, accept NO messages/ + */ + if ( pcbch->msg_id[0] EQ NOT_PRESENT_16BIT ) + { + if (pcbch->modus EQ CBCH_IGNORE) + { + return TRUE; + } + else + { + return FALSE; + } + } + + /* + * initialise result + * if the msg_id is not found and MMI specified + * a positive range(CBCH_ACCEPT) return 0 + */ + result = (UBYTE)(pcbch->modus EQ CBCH_ACCEPT ? FALSE : TRUE); + + /* + * message identifier are stored as a pair to express a range + */ + for (i=0; i < MAX_IDENTS-1; i+=2) + { + /* + * end of list reached + */ + if (pcbch->msg_id[i] EQ NOT_PRESENT_16BIT) + break; + + /* + * check whether the message identifier is inside or outside + * the range. Result depends on what MMI has requested. + */ + if ((pcbch->msg_id[i] <= msg_id) AND + (pcbch->msg_id[i+1] >= msg_id)) + result = (UBYTE)(pcbch->modus EQ CBCH_ACCEPT ? TRUE : FALSE); + } + + return result; +} + + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_sat_check_message_id | ++--------------------------------------------------------------------+ + + PURPOSE : Check Message Identifier of the first CBCH block for CBCH + download purposes. + +*/ + +LOCAL UBYTE cb_sat_check_message_id (USHORT msg_id) +{ + USHORT i; + UBYTE result; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + /* + * initialize result + */ + result = FALSE; + + /* + * for all stored message identifier of CBCH download + */ + for (i = 0; i < MAX_IDENTS_SAT; i++) + { + /* + * end of list reached + */ + if (pcbch->msg_id_sat[i] EQ NOT_PRESENT_16BIT) + break; + + /* + * if message identifier matches + */ + if (pcbch->msg_id_sat[i] EQ msg_id) + { + result = TRUE; + break; + } + } + + return result; +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_check_data_coding_scheme| ++--------------------------------------------------------------------+ + + PURPOSE : Check Data Coding Scheme of the first CBCH block. + +*/ +LOCAL UBYTE cb_check_data_coding_scheme (UBYTE dcs_id) +{ + USHORT i; + UBYTE result = TRUE; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + /* + * if the list is empty, result is positive + */ + if (pcbch->dcs_id [0] EQ NOT_PRESENT_8BIT) + return result; + + /* + * initialise result + * if the dcs_id is not found and MMI specified + * a positive range(CBCH_ACCEPT) return 0 + */ + result = (UBYTE)(pcbch->modus EQ CBCH_ACCEPT ? 0 : 1); + + + for (i=0;i<MAX_IDENTS-1;i+=2) + { + /* + * end of list reached + */ + if (pcbch->dcs_id[i] EQ NOT_PRESENT_8BIT) + break; + + /* + * Data Coding Scheme identifier matches + */ + if (pcbch->dcs_id[i] <= dcs_id AND + pcbch->dcs_id[i+1] >= dcs_id) + result = (UBYTE)(pcbch->modus EQ CBCH_ACCEPT ? 1 : 0); + } + + return result; +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_check_old_msg | ++--------------------------------------------------------------------+ + + PURPOSE : Check against old messages. + +*/ +LOCAL UBYTE cb_check_old_msg (void) +{ + int i; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + T_CBMSG_HEADER *p_cbh = (T_CBMSG_HEADER*)&pcbch->msg[0]; + + ALR_TRACE_CB ("compare with stored msg"); + for (i=0; i < pcbch->old_cbch_msg.cnt; i++) + { + ALR_TRACE_CB_MSGHEAD (&pcbch->old_cbch_msg.header[i]) + + if (memcmp (&pcbch->old_cbch_msg.header[i], p_cbh, 6) EQ 0) + { + return FALSE; /* already stored message */ + } + else + { + /* if the difference is only in the update number, + * then we need to delete the old version of the message (so that the different + * versions do not fill up the storage) and we can even abandon the comparison; + * a message that is resent with a different update number should only use + * one entry in the list; otherwise it may throw out other messages that should be kept; + * think of German network that sends every minute a new update; would use up 15 entries + * + * some change, now check if it is only the update number that has changed + * (memcmp covers 4 header bytes: msg_id3, msg_id4, dcs and page + * => ignore lint warning) + */ + if ((CB_GS_CODE(&pcbch->old_cbch_msg.header[i]) == CB_GS_CODE(p_cbh)) AND + (CB_MSG_CODE(&pcbch->old_cbch_msg.header[i]) == CB_MSG_CODE(p_cbh)) AND + !memcmp (&(((T_CBMSG_HEADER*)&pcbch->old_cbch_msg.header[i])->msg_id3), + &p_cbh->msg_id3, 4)) /*lint !e420 (Warning -- Apparent access beyond array for function 'memcmp(const void *, const void *, unsigned int)', argument 3 (size=4) exceeds argument 1 (size=1)) */ + { /* all these fields match, therefore the change must have been only in the update number */ + + SHORT old_update_nr, new_update_nr; + old_update_nr = CB_UPDATE_NO(&pcbch->old_cbch_msg.header[i]); + new_update_nr = CB_UPDATE_NO(p_cbh); + /* + * 3GPP 03 41 + * Any Update Number eight or less higher (modulo 16) than the last received Update Number + * will be considered more recent, and shall be treated as a new message + */ + if((!new_update_nr) OR + ((new_update_nr - old_update_nr + MAX_UPDATE_NO) % MAX_UPDATE_NO <= MAX_UPDATE_NO_DIFF)) + { + ALR_TRACE_CB ("change update num, delete old message"); + /* remove the old message so that we do not use up another entry for this new version of the message */ + cb_remove_message (i); + /* skip out of loop because we found the match */ + break; + } + else + return FALSE; + } + } + } + + return TRUE; /* new message */ +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_read_cbch | ++--------------------------------------------------------------------+ + + PURPOSE : Starts reading of the first block of CBCH. + The parameter defines if the extended or the normal CBCH + should be read and if scheduling should be used. + +*/ + +LOCAL void cb_read_cbch (UBYTE flags) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = (UBYTE)(flags & CBCH_READ_EXT); + ULONG first_block = pcbch->schedule_map[extended][0]; + ULONG second_block = pcbch->schedule_map[extended][1]; + + PALLOC (sched_req, MPHC_CBCH_SCHEDULE_REQ); + + ALR_TRACE_CB_START_READ(flags); + + sched_req->cbch_select = extended; + + ALR_EM_START_CBCH_READING; + + if(flags & CBCH_SCHED) + { + UBYTE n = pcbch->begin_schedule[extended] -1; + + sched_req->schedule_length = pcbch->end_schedule[extended] - + pcbch->begin_schedule[extended] +1; + + /* + * the MPHC SAP uses first_blocks_1 as USHORT although the internal data base + * of ALR uses for convinience an array of 2 ULONG for first_blocks_0 and + * first_blocks_1; ergo: do a cast for first_blocks_1 here + */ + + if( pcbch->begin_schedule[extended] EQ 1) + { + sched_req->first_blocks_0 = first_block; + sched_req->first_blocks_1 = (USHORT)second_block; + } + else if(pcbch->begin_schedule[extended] < 32) + { + sched_req->first_blocks_0 = (first_block >> n) | ((second_block << (32 - n))); + sched_req->first_blocks_1 = (USHORT) (second_block >> n); + } + else + { + sched_req->first_blocks_0 = (USHORT)(second_block >> (n - 32)); + sched_req->first_blocks_1 = 0; + } + } + else + { + sched_req->schedule_length = 0; + } + + ma_cb_sched_req(sched_req); +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_check_ci_lai_plmn | ++--------------------------------------------------------------------+ + + PURPOSE : Checking the Cell Identity and the Location Area Identification + to handle the geographical zone parameter. +*/ + +LOCAL void cb_check_ci_lai_plmn (void) +{ + USHORT i; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE keep = 0x00; + UBYTE *si3 = &alr_data->ma_data.sys_info_3[0]; + UBYTE *lac = &pcbch->old_cid_plmn_lac[0]; + UCHAR gs_scope_change_ind = CB_GEOGR_CHANGE_NONE; + + /* + * it is not permitted to save the cbch message, + * if the following pattern are in the + * location area identification (bcch:sys_info_3) : + * [4] 0x00 + * [5] 0xF1 + * [6] 0x10 + * + * that means FTA in testhouse. + */ + if ((si3[4] EQ 0x00) AND + (si3[5] EQ 0xF1) AND + (si3[6] EQ 0x10) + ) + return; + + if ((si3[4] NEQ lac[2]) OR + (si3[5] NEQ lac[3]) OR + (si3[6] NEQ lac[4]) + ) + { + /* + * The PLNM has changed + */ + gs_scope_change_ind = CB_GEOGR_CHANGE_PLMN; + pcbch->old_cbch_msg.cnt = 0; /* clear all messages */ + } + else if ((si3[7] NEQ lac[5]) OR + (si3[8] NEQ lac[6]) + ) + { + /* + * The location area identification has changed + */ + keep = CB_GEOGR_SCOPE_PLMN; /* keep PLMN wide messages */ + gs_scope_change_ind = CB_GEOGR_CHANGE_LAC; + } + else if ((si3[2] NEQ lac[0]) OR + (si3[3] NEQ lac[1]) + ) + { + /* + * The Cell Identity has changed + */ + + /* indicate cell change to MMI only if we have received any CBCH broadcast messages */ + if (pcbch->old_cbch_msg.cnt > 0) + gs_scope_change_ind = CB_GEOGR_CHANGE_CELL; + keep = CB_GEOGR_SCOPE_CELLN; /* keep PLMN and Location Area wide messages */ + } + + if (keep) + { /* cell or lac change occurred!, so delete all old cell wide or lac wide messages */ + for (i=0; i<pcbch->old_cbch_msg.cnt; i++) + { + T_CBMSG_HEADER *p_old_cbh = (T_CBMSG_HEADER*)(&pcbch->old_cbch_msg.header[i]); + /* + * check all stored messages, use geographical scope parameter + */ + if (((CB_GS_CODE(p_old_cbh) & keep) EQ 0) OR /* old changed msgs */ + (CB_GS_CODE(p_old_cbh) EQ CB_GEOGR_SCOPE_CELLI) OR /* old cell wide msgs (immediate) */ + (CB_GS_CODE(p_old_cbh) EQ CB_GEOGR_SCOPE_CELLN) /* old cell wide msgs (normal) */ + ) + { + ALR_TRACE_CB_SCOPE_CHANGE (gs_scope_change_ind, CB_GS_CODE(p_old_cbh)); + cb_remove_message (i--); + } + } + } + + /* + * update old_cid_plmn_lac + */ + memcpy (lac, &si3[2], 7); + +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_remove_message | ++--------------------------------------------------------------------+ + + PURPOSE : Removes the indicated CBCH message from the internal + storage. + +*/ +LOCAL void cb_remove_message (USHORT i) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + if ((pcbch->old_cbch_msg.cnt) AND + (i < pcbch->old_cbch_msg.cnt)) + { + ALR_TRACE_CB ("remove msg"); + ALR_TRACE_CB_MSGHEAD (&pcbch->old_cbch_msg.header[i]); + + /* + * decrement number of stored messages. + */ + pcbch->old_cbch_msg.cnt--; + memmove (&pcbch->old_cbch_msg.header[i], + &pcbch->old_cbch_msg.header[i+1], + (pcbch->old_cbch_msg.cnt-i) * sizeof(T_CBMSG_HEADER)); + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_create_schedule_map | ++--------------------------------------------------------------------+ + + PURPOSE : Creation of a schedule map. + +*/ +LOCAL void cb_create_schedule_map (UBYTE old_cb_msg) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + UBYTE* msg_ptr; + + /* + * Store begin and end slot number + */ + pcbch->begin_schedule [extended] = (UBYTE)(pcbch->msg [0] & 0x3F); + pcbch->end_schedule [extended] = pcbch->msg [1]; + + /* + * clear schedule bitmap + */ + pcbch->schedule_length[extended] = 0; + memset (&pcbch->schedule_map[extended][0], 0, + 2*sizeof (pcbch->schedule_map[extended][0])); + /* + * Check all new entries, + * msg_ptr to first message description + */ + msg_ptr = &pcbch->msg[8]; + + msg_ptr = cb_create_schedule_entries (msg_ptr, 1); + + if (old_cb_msg) + { + cb_create_schedule_entries (msg_ptr, FALSE); + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_create_schedule_entries | ++--------------------------------------------------------------------+ + + PURPOSE : Creation of schedule entries. + +*/ +LOCAL UBYTE* cb_create_schedule_entries (UBYTE* msg_ptr, BOOL flag) +{ + unsigned i; + BOOL result; + UBYTE x; + USHORT msg_id; + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + + pcbch->last_slot_read[extended] = 0; + for (i=0; i < pcbch->end_schedule[extended]; i++) + { + result = (pcbch->msg [2 + ((i+1)>>3)] & (1 <<(8-((i+1)&7)))); + + ALR_TRACE_CB_SCHEDULE(i+1,result); + + if ((flag AND result) OR (!flag AND !result)) + { + /* + * result and bit are set, that means the msg: + * - was not send during the previous schedule period + * - or the msg was sent unscheduled during the last period + * - or is free of charge, reading advised + * result and bit are both not set , that means the msg: + * - the msg doesn't match the above + * - these msgs are read only during the first 2 schedule periods + */ + if (*msg_ptr & 0x80) + { + /* + * First transmission of an SMSCB within the + * Schedule Period + */ + + msg_id = (UBYTE)((*msg_ptr) & 0x7F); + msg_ptr++; + msg_id = (USHORT)(msg_id + *msg_ptr); + if (cb_check_message_id (msg_id)) + { + /* + * Message Identifier is expected + * then set slot bit in schedule map + */ + pcbch->schedule_map[extended][i>>5] |= 1 << (i&31); + if( (i+1) >= pcbch->begin_schedule[extended] ) + { + pcbch->schedule_length[extended]++; + pcbch->last_slot_read[extended] = (i+1); + } + } + } + else + { + if ((*msg_ptr & 0xC0) EQ 0) + { + /* + * Retransmission indication + * Extract original message slot number + */ + x = (UBYTE)(*msg_ptr & 0x3F); + if (x) + { + x--; + if (pcbch->schedule_map[extended][x>>5] & (1 << (x&31)) ) + { + /* + * original message will be read, then set also + * repetition of message in schedule map + */ + pcbch->schedule_map[extended][i>>5] |= 1 << (i&31); + if( (i+1) >= pcbch->begin_schedule[extended] ) + { + pcbch->schedule_length[extended]++; + pcbch->last_slot_read[extended] = (i+1); + } + } + } + } + else + { + if (*msg_ptr EQ 0x41) + { + /* + * Free Message Slot, reading advised + * Set bit in schedule map + */ + pcbch->schedule_map[extended][i>>5] |= 1 << (i&31); + if( (i+1) >= pcbch->begin_schedule[extended] ) + { + pcbch->schedule_length[extended]++; + pcbch->last_slot_read[extended] = (i+1); + } + } + } + } + /* + * increment message description pointer + */ + msg_ptr++; + } + } + return msg_ptr; +} + + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : cb_next_scheduled_msg | ++--------------------------------------------------------------------+ + + PURPOSE : Looks for end of scheduling period. + +*/ +LOCAL void cb_next_scheduled_msg(void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + UBYTE extended = pcbch->msg_is_extended; + + if ((get_cbch_state(extended)) EQ CBCH_DRX ) + { + if( pcbch->schedule_length[extended] EQ 0 ) + { + /* + * instead of the scheduled SCHEDULE message + * an invalid message has been received. + * Restarting with NO DRX mode + */ + set_cbch_state (extended, CBCH_NO_DRX); + cb_read_cbch ((UBYTE)(CBCH_NO_SCHED | extended)); + return; + } + pcbch->schedule_length[extended]--; + + if(pcbch->schedule_length[extended] EQ 0) + { + /* + * clear schedule map + * all message slots have been read + * + * NO need to reconfigure L1 to re-read schedule message + * that follows slot 48 + */ + memset (&pcbch->schedule_map[extended][0], 0, + 2*sizeof (pcbch->schedule_map[extended][0])); + TRACE_EVENT("Scheduled Schedule message expected"); + + } + } +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : get_cbch_state | ++--------------------------------------------------------------------+ + + PURPOSE : Returns the state of STATE_EXT_CBCH or STATE_NORMAL_CBCH + depending upon the input parameter "extended" + +*/ + +UBYTE get_cbch_state( UBYTE extended) +{ + if( extended) + return GET_STATE(STATE_EXT_CBCH); + else + return GET_STATE(STATE_NORMAL_CBCH); +} + +/* ++--------------------------------------------------------------------+ +| PROJECT : GSM-PS (6103) MODULE : ALR_CBCH | +| STATE : code ROUTINE : set_cbch_state | ++--------------------------------------------------------------------+ + + PURPOSE : Sets the state of STATE_EXT_CBCH or STATE_NORMAL_CBCH + depending upon the input parameter "extended" + +*/ + +void set_cbch_state( UBYTE extended, UBYTE new_state) +{ + if(extended) + { + SET_STATE(STATE_EXT_CBCH,new_state); + } + else + SET_STATE(STATE_NORMAL_CBCH,new_state); +} + + +#if defined(FF_HOMEZONE) +GLOBAL void cb_tim_homezone (void) +{ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + if (pcbch->homezone EQ CBCH_HZ_IDLE) + { + if (GET_STATE(STATE_MA) EQ MA_IDLE) + { + ALR_TRACE_CB ("call cb_start()"); + cb_start (); + } + else + { + TIMERSTART (TIM_HOMEZONE, 1000); + } + } + else if (pcbch->homezone EQ CBCH_HZ_PENDING) + { + /* + * mark as received, indicate error, stop CBCH reading + */ + ALR_TRACE_CB ("cb_ind_hz_err()"); + pcbch->homezone = CBCH_HZ_RECEIVED; +#if defined(INDICATE_HZ_ERROR) + cb_ind_hz_err (); +#endif /* INDICATE_HZ_ERROR */ + if ( (pcbch->modus EQ NOT_PRESENT_8BIT) + AND (!pcbch->sat_enabled)) + cb_stop (); + } +} + +LOCAL UBYTE cb_check_homezone (UBYTE length) +{ + UBYTE result = FALSE;/* no special handling of homezone CBCH message */ + T_CBCH_DATA *pcbch = &alr_data->cbch_data; + + if (pcbch->homezone EQ CBCH_HZ_PENDING) + { + T_CBMSG_HEADER *p_cbh; + p_cbh = (T_CBMSG_HEADER*)(&pcbch->msg[0]); + + if ( (CB_MESSAGE_ID (p_cbh) EQ pcbch->msg_hz_id) + AND (CB_DCS (p_cbh) EQ pcbch->dcs_hz_id) + ) + { + /* one-time request of homezone CBCH message after cell reselection */ + TIMERSTOP (TIM_HOMEZONE); + pcbch->homezone = CBCH_HZ_RECEIVED; + ALR_TRACE_CB_MSGHEAD (p_cbh); + ALR_TRACE_CB ("homezone msg received"); + cb_ind (length); + result = TRUE; + + if ( (pcbch->modus EQ NOT_PRESENT_8BIT) + AND (!pcbch->sat_enabled)) + { + ALR_TRACE_CB ("no other msg req."); + cb_stop (); + } + else + cb_stop_next_blocks (); + } + } + + return result; +} +#endif /* FF_HOMEZONE */ + +#endif