2010-04-09 19:32:56 +00:00
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/* Layer 1 - FCCH and SCH burst handling */
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/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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2010-05-19 19:41:24 +00:00
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#include <errno.h>
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2010-04-09 19:32:56 +00:00
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#include <defines.h>
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#include <debug.h>
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#include <memory.h>
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#include <byteorder.h>
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#include <osmocore/gsm_utils.h>
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#include <osmocore/msgb.h>
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#include <calypso/dsp_api.h>
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#include <calypso/irq.h>
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#include <calypso/tpu.h>
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#include <calypso/tsp.h>
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#include <calypso/dsp.h>
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#include <calypso/timer.h>
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#include <comm/sercomm.h>
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#include <layer1/sync.h>
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#include <layer1/afc.h>
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#include <layer1/tdma_sched.h>
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#include <layer1/mframe_sched.h>
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#include <layer1/tpu_window.h>
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#include <layer1/l23_api.h>
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#include <l1a_l23_interface.h>
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2010-06-20 15:05:01 +00:00
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#define FB0_RETRY_COUNT 3
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2010-06-20 15:26:27 +00:00
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#define AFC_RETRY_COUNT 30
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2010-06-20 15:05:01 +00:00
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2010-04-09 19:32:56 +00:00
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extern uint16_t rf_arfcn; // TODO
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struct mon_state {
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uint32_t fnr_report; /* frame number when DSP reported it */
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int attempt; /* which attempt was this ? */
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int16_t toa;
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uint16_t pm;
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uint16_t angle;
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uint16_t snr;
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/* computed values */
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int16_t freq_diff;
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2010-05-19 19:41:24 +00:00
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/* Sync Burst (SB) */
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uint8_t bsic;
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struct gsm_time time;
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2010-04-09 19:32:56 +00:00
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};
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2010-05-19 19:41:24 +00:00
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struct l1a_fb_state {
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struct mon_state mon;
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struct l1ctl_fbsb_req req;
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int16_t initial_freq_err;
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2010-06-20 15:05:01 +00:00
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uint8_t fb_retries;
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2010-06-20 15:26:27 +00:00
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uint8_t afc_retries;
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2010-05-19 19:41:24 +00:00
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};
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static struct l1a_fb_state fbs;
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static struct mon_state *last_fb = &fbs.mon;
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2010-04-09 19:32:56 +00:00
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static void dump_mon_state(struct mon_state *fb)
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{
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#if 0
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printf("(%u:%u): TOA=%5u, Power=%4ddBm, Angle=%5dHz, "
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"SNR=%04x(%d.%u) OFFSET=%u SYNCHRO=%u\n",
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fb->fnr_report, fb->attempt, fb->toa,
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agc_inp_dbm8_by_pm(fb->pm)/8, ANGLE_TO_FREQ(fb->angle),
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fb->snr, l1s_snr_int(fb->snr), l1s_snr_fract(fb->snr),
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tpu_get_offset(), tpu_get_synchro());
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#else
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2010-05-20 21:26:42 +00:00
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printf("(%u:%u): TOA=%5u, Power=%4ddBm, Angle=%5dHz\n",
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2010-04-09 19:32:56 +00:00
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fb->fnr_report, fb->attempt, fb->toa,
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agc_inp_dbm8_by_pm(fb->pm)/8, ANGLE_TO_FREQ(fb->angle));
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#endif
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}
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2010-05-19 19:41:24 +00:00
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static int l1ctl_fbsb_resp(uint8_t res)
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2010-04-09 19:32:56 +00:00
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{
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2010-05-19 19:41:24 +00:00
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struct msgb *msg;
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2010-06-20 17:10:21 +00:00
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struct l1ctl_fbsb_conf *resp;
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2010-04-09 19:32:56 +00:00
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2010-06-20 17:10:21 +00:00
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msg = l1_create_l2_msg(L1CTL_FBSB_CONF, fbs.mon.time.fn,
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2010-05-20 21:26:42 +00:00
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l1s_snr_int(fbs.mon.snr),
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fbs.req.band_arfcn);
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2010-05-19 19:41:24 +00:00
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if (!msg)
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return -ENOMEM;
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2010-04-09 19:32:56 +00:00
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2010-06-20 17:10:21 +00:00
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resp = (struct l1ctl_fbsb_conf *) msgb_put(msg, sizeof(*resp));
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2010-05-19 19:41:24 +00:00
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resp->initial_freq_err = htons(fbs.initial_freq_err);
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resp->result = res;
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2010-05-20 21:26:42 +00:00
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resp->bsic = fbs.mon.bsic;
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2010-04-09 19:32:56 +00:00
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2010-05-19 19:41:24 +00:00
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/* no need to set BSIC, as it is never used here */
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l1_queue_for_l2(msg);
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2010-04-09 19:32:56 +00:00
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return 0;
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}
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/* SCH Burst Detection ********************************************************/
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/* determine the GSM time and BSIC from a Sync Burst */
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static uint8_t l1s_decode_sb(struct gsm_time *time, uint32_t sb)
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{
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uint8_t bsic = (sb >> 2) & 0x3f;
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uint8_t t3p;
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memset(time, 0, sizeof(*time));
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/* TS 05.02 Chapter 3.3.2.2.1 SCH Frame Numbers */
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time->t1 = ((sb >> 23) & 1) | ((sb >> 7) & 0x1fe) | ((sb << 9) & 0x600);
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time->t2 = (sb >> 18) & 0x1f;
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t3p = ((sb >> 24) & 1) | ((sb >> 15) & 6);
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time->t3 = t3p*10 + 1;
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/* TS 05.02 Chapter 4.3.3 TDMA frame number */
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time->fn = gsm_gsmtime2fn(time);
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time->tc = (time->fn / 51) % 8;
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return bsic;
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}
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static void read_sb_result(struct mon_state *st, int attempt)
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{
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st->toa = dsp_api.db_r->a_serv_demod[D_TOA];
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st->pm = dsp_api.db_r->a_serv_demod[D_PM]>>3;
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st->angle = dsp_api.db_r->a_serv_demod[D_ANGLE];
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st->snr = dsp_api.db_r->a_serv_demod[D_SNR];
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st->freq_diff = ANGLE_TO_FREQ(st->angle);
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st->fnr_report = l1s.current_time.fn;
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st->attempt = attempt;
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dump_mon_state(st);
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if (st->snr > AFC_SNR_THRESHOLD)
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afc_input(st->freq_diff, rf_arfcn, 1);
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else
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afc_input(st->freq_diff, rf_arfcn, 0);
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dsp_api.r_page_used = 1;
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}
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/* Note: When we get the SB response, it is 2 TDMA frames after the SB
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* actually happened, as it is a "C W W R" task */
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#define SB2_LATENCY 2
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static int l1s_sbdet_resp(__unused uint8_t p1, uint8_t attempt,
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__unused uint16_t p3)
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{
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uint32_t sb;
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int qbits, fn_offset;
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struct l1_cell_info *cinfo = &l1s.serving_cell;
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int fnr_delta, bits_delta;
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struct l1ctl_sync_new_ccch_resp *l1;
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struct msgb *msg;
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putchart('s');
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if (dsp_api.db_r->a_sch[0] & (1<<B_SCH_CRC)) {
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/* mark READ page as being used */
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dsp_api.r_page_used = 1;
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2010-05-19 19:41:24 +00:00
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/* after 2nd attempt, we failed */
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2010-05-20 21:26:42 +00:00
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if (attempt == 2) {
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last_fb->attempt = 13;
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l1s_compl_sched(L1_COMPL_FB);
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}
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2010-05-19 19:41:24 +00:00
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/* after 1st attempt, we simply wait for 2nd */
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2010-04-09 19:32:56 +00:00
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return 0;
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}
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printf("SB%d ", attempt);
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2010-05-20 21:26:42 +00:00
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read_sb_result(last_fb, attempt);
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2010-04-09 19:32:56 +00:00
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sb = dsp_api.db_r->a_sch[3] | dsp_api.db_r->a_sch[4] << 16;
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2010-05-19 19:41:24 +00:00
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fbs.mon.bsic = l1s_decode_sb(&fbs.mon.time, sb);
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printf("=> SB 0x%08x: BSIC=%u ", sb, fbs.mon.bsic);
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l1s_time_dump(&fbs.mon.time);
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2010-04-09 19:32:56 +00:00
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2010-05-20 21:26:42 +00:00
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l1s.serving_cell.bsic = fbs.mon.bsic;
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2010-04-09 19:32:56 +00:00
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/* calculate synchronisation value (TODO: only complete for qbits) */
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last_fb->toa -= 23;
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qbits = last_fb->toa * 4;
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fn_offset = l1s.current_time.fn; // TODO
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if (qbits > QBITS_PER_TDMA) {
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qbits -= QBITS_PER_TDMA;
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fn_offset -= 1;
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} else if (qbits < 0) {
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qbits += QBITS_PER_TDMA;
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fn_offset += 1;
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}
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fnr_delta = last_fb->fnr_report - attempt;
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bits_delta = fnr_delta * BITS_PER_TDMA;
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cinfo->fn_offset = fnr_delta;
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cinfo->time_alignment = qbits;
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cinfo->arfcn = rf_arfcn;
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if (last_fb->toa > bits_delta)
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printf("=> DSP reports SB in bit that is %d bits in the "
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"future?!?\n", last_fb->toa - bits_delta);
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else
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printf(" qbits=%u\n", qbits);
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2010-05-20 21:26:42 +00:00
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synchronize_tdma(&l1s.serving_cell);
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2010-04-09 19:32:56 +00:00
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/* if we have recived a SYNC burst, update our local GSM time */
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2010-05-20 21:26:42 +00:00
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gsm_fn2gsmtime(&l1s.current_time, fbs.mon.time.fn + SB2_LATENCY);
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2010-04-09 19:32:56 +00:00
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/* compute next time from new current time */
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l1s.next_time = l1s.current_time;
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l1s_time_inc(&l1s.next_time, 1);
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/* If we call tdma_sched_reset(), which is only needed if there
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* are further l1s_sbdet_resp() scheduled, we will bring
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* dsp_api.db_r and dsp_api.db_w out of sync because we changed
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* dsp_api.db_w for l1s_sbdet_cmd() and canceled
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* l1s_sbdet_resp() which would change dsp_api.db_r. The DSP
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* however expects dsp_api.db_w and dsp_api.db_r to be in sync
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* (either "0 - 0" or "1 - 1"). So we have to bring dsp_api.db_w
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* and dsp_api.db_r into sync again, otherwise NB reading will
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* complain. We probably don't need the Abort command and could
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* just bring dsp_api.db_w and dsp_api.db_r into sync. */
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if (attempt != 2) {
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tdma_sched_reset();
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l1s_dsp_abort();
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}
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2010-05-20 21:26:42 +00:00
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l1s_reset_hw();
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/* enable the MF Task for BCCH reading */
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mframe_enable(MF_TASK_BCCH_NORM);
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2010-06-20 20:40:03 +00:00
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if (l1s.serving_cell.ccch_mode == CCCH_MODE_COMBINED)
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mframe_enable(MF_TASK_CCCH_COMB);
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else if (l1s.serving_cell.ccch_mode == CCCH_MODE_NON_COMBINED)
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mframe_enable(MF_TASK_CCCH);
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2010-05-20 21:26:42 +00:00
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l1s_compl_sched(L1_COMPL_FB);
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2010-04-09 19:32:56 +00:00
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return 0;
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}
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static int l1s_sbdet_cmd(__unused uint8_t p1, __unused uint8_t p2,
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__unused uint16_t p3)
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{
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putchart('S');
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2010-05-20 21:26:42 +00:00
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fbs.mon.bsic = 0;
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fbs.mon.time.fn = 0;
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2010-04-09 19:32:56 +00:00
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dsp_api.db_w->d_task_md = SB_DSP_TASK;
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dsp_api.ndb->d_fb_mode = 0; /* wideband search */
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dsp_end_scenario();
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/* Program TPU */
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l1s_rx_win_ctrl(rf_arfcn, L1_RXWIN_SB);
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tpu_end_scenario();
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return 0;
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}
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2010-05-19 19:41:24 +00:00
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/* This is how it is done by the TSM30 */
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static const struct tdma_sched_item sb_sched_set[] = {
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SCHED_ITEM(l1s_sbdet_cmd, 0, 1), SCHED_END_FRAME(),
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SCHED_ITEM(l1s_sbdet_cmd, 0, 2), SCHED_END_FRAME(),
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SCHED_END_FRAME(),
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SCHED_ITEM(l1s_sbdet_resp, 0, 1), SCHED_END_FRAME(),
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SCHED_ITEM(l1s_sbdet_resp, 0, 2), SCHED_END_FRAME(),
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SCHED_END_SET()
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};
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2010-04-09 19:32:56 +00:00
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void l1s_sb_test(uint8_t base_fn)
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{
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2010-05-19 19:41:24 +00:00
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tdma_schedule_set(base_fn, sb_sched_set, 0);
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}
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/* FCCH Burst *****************************************************************/
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static int read_fb_result(struct mon_state *st, int attempt)
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{
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st->toa = dsp_api.ndb->a_sync_demod[D_TOA];
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st->pm = dsp_api.ndb->a_sync_demod[D_PM]>>3;
|
|
|
|
st->angle = dsp_api.ndb->a_sync_demod[D_ANGLE];
|
|
|
|
st->snr = dsp_api.ndb->a_sync_demod[D_SNR];
|
|
|
|
|
|
|
|
//last_fb->angle = clip_int16(last_fb->angle, AFC_MAX_ANGLE);
|
|
|
|
st->freq_diff = ANGLE_TO_FREQ(last_fb->angle);
|
|
|
|
st->fnr_report = l1s.current_time.fn;
|
|
|
|
st->attempt = attempt;
|
|
|
|
|
|
|
|
dump_mon_state(st);
|
|
|
|
|
|
|
|
dsp_api.ndb->d_fb_det = 0;
|
|
|
|
dsp_api.ndb->a_sync_demod[D_TOA] = 0; /* TSM30 does it (really needed ?) */
|
|
|
|
|
|
|
|
/* Update AFC with current frequency offset */
|
|
|
|
afc_correct(st->freq_diff, rf_arfcn);
|
|
|
|
|
|
|
|
//tpu_dsp_frameirq_enable();
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2010-05-20 21:26:42 +00:00
|
|
|
static void fbinfo2cellinfo(struct l1_cell_info *cinfo,
|
|
|
|
const struct mon_state *mon)
|
|
|
|
{
|
|
|
|
int ntdma, qbits, fn_offset, fnr_delta, bits_delta;
|
|
|
|
|
|
|
|
/* FIXME: where did this magic 23 come from? */
|
|
|
|
last_fb->toa -= 23;
|
|
|
|
|
|
|
|
if (last_fb->toa < 0) {
|
|
|
|
qbits = (last_fb->toa + BITS_PER_TDMA) * 4;
|
|
|
|
ntdma = -1;
|
|
|
|
} else {
|
|
|
|
ntdma = (last_fb->toa) / BITS_PER_TDMA;
|
|
|
|
qbits = (last_fb->toa - ntdma * BITS_PER_TDMA) * 4;
|
|
|
|
}
|
|
|
|
|
|
|
|
fn_offset = l1s.current_time.fn - last_fb->attempt + ntdma;
|
|
|
|
fnr_delta = last_fb->fnr_report - last_fb->attempt;
|
|
|
|
bits_delta = fnr_delta * BITS_PER_TDMA;
|
|
|
|
|
|
|
|
cinfo->fn_offset = fnr_delta;
|
|
|
|
cinfo->time_alignment = qbits;
|
|
|
|
cinfo->arfcn = rf_arfcn;
|
|
|
|
|
|
|
|
if (last_fb->toa > bits_delta)
|
|
|
|
printf("=> DSP reports FB in bit that is %d bits in "
|
|
|
|
"the future?!?\n", last_fb->toa - bits_delta);
|
|
|
|
else {
|
|
|
|
int fb_fnr = (last_fb->fnr_report - last_fb->attempt)
|
|
|
|
+ last_fb->toa/BITS_PER_TDMA;
|
|
|
|
printf("=>FB @ FNR %u fn_offset=%d qbits=%u\n",
|
|
|
|
fb_fnr, fn_offset, qbits);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-19 19:41:24 +00:00
|
|
|
/* scheduler callback to issue a FB detection task to the DSP */
|
|
|
|
static int l1s_fbdet_cmd(__unused uint8_t p1, __unused uint8_t p2,
|
|
|
|
uint16_t fb_mode)
|
|
|
|
{
|
|
|
|
if (fb_mode == 0) {
|
|
|
|
putchart('F');
|
|
|
|
} else {
|
|
|
|
putchart('V');
|
|
|
|
}
|
|
|
|
|
|
|
|
l1s.fb.mode = fb_mode;
|
|
|
|
|
2010-06-25 14:39:01 +00:00
|
|
|
/* Tell the RF frontend to set the gain appropriately */
|
|
|
|
rffe_set_gain(-85, CAL_DSP_TGT_BB_LVL);
|
|
|
|
|
2010-05-19 19:41:24 +00:00
|
|
|
/* Program DSP */
|
|
|
|
dsp_api.db_w->d_task_md = FB_DSP_TASK; /* maybe with I/Q swap? */
|
|
|
|
dsp_api.ndb->d_fb_mode = fb_mode;
|
|
|
|
dsp_end_scenario();
|
|
|
|
|
|
|
|
/* Program TPU */
|
|
|
|
l1s_rx_win_ctrl(fbs.req.band_arfcn, L1_RXWIN_FB);
|
|
|
|
tpu_end_scenario();
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-05-29 10:02:02 +00:00
|
|
|
#if 0
|
2010-05-20 21:26:42 +00:00
|
|
|
#define FB0_SNR_THRESH 2000
|
|
|
|
#define FB1_SNR_THRESH 3000
|
2010-05-29 10:02:02 +00:00
|
|
|
#else
|
|
|
|
#define FB0_SNR_THRESH 0
|
|
|
|
#define FB1_SNR_THRESH 0
|
|
|
|
#endif
|
2010-05-19 19:41:24 +00:00
|
|
|
|
|
|
|
static const struct tdma_sched_item fb_sched_set[];
|
|
|
|
|
|
|
|
/* scheduler callback to check for a FB detection response */
|
|
|
|
static int l1s_fbdet_resp(__unused uint8_t p1, uint8_t attempt,
|
|
|
|
uint16_t fb_mode)
|
|
|
|
{
|
|
|
|
putchart('f');
|
|
|
|
|
2010-05-20 21:26:42 +00:00
|
|
|
if (!dsp_api.ndb->d_fb_det) {
|
2010-05-19 19:41:24 +00:00
|
|
|
/* we did not detect a FB */
|
|
|
|
|
|
|
|
/* attempt < 12, do nothing */
|
|
|
|
if (attempt < 12)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* attempt >= 12, we simply don't find one */
|
|
|
|
|
|
|
|
/* If we don't reset here, we get DSP DMA errors */
|
|
|
|
tdma_sched_reset();
|
|
|
|
|
2010-06-20 15:05:01 +00:00
|
|
|
if (fbs.fb_retries < FB0_RETRY_COUNT) {
|
|
|
|
/* retry once more */
|
|
|
|
tdma_schedule_set(1, fb_sched_set, 0);
|
|
|
|
fbs.fb_retries++;
|
|
|
|
} else {
|
|
|
|
last_fb->attempt = 13;
|
|
|
|
l1s_compl_sched(L1_COMPL_FB);
|
|
|
|
}
|
2010-05-20 21:26:42 +00:00
|
|
|
|
|
|
|
return 0;
|
2010-05-19 19:41:24 +00:00
|
|
|
}
|
|
|
|
|
2010-05-20 21:26:42 +00:00
|
|
|
/* We found a frequency burst, reset everything */
|
|
|
|
l1s_reset_hw();
|
|
|
|
|
|
|
|
printf("FB%u ", dsp_api.ndb->d_fb_mode);
|
|
|
|
read_fb_result(last_fb, attempt);
|
|
|
|
|
|
|
|
/* if this is the first success, save freq err */
|
|
|
|
if (!fbs.initial_freq_err)
|
|
|
|
fbs.initial_freq_err = last_fb->freq_diff;
|
|
|
|
|
2010-05-19 19:41:24 +00:00
|
|
|
/* If we don't reset here, we get DSP DMA errors */
|
|
|
|
tdma_sched_reset();
|
|
|
|
|
|
|
|
/* Immediately schedule further TDMA tasklets, if requested. Doing
|
|
|
|
* this directly from L1S means we can do this quickly without any
|
|
|
|
* additional delays */
|
|
|
|
if (fb_mode == 0) {
|
|
|
|
if (fbs.req.flags & L1CTL_FBSB_F_FB1) {
|
|
|
|
/* If we don't reset here, we get DSP DMA errors */
|
|
|
|
tdma_sched_reset();
|
|
|
|
/* FIXME: don't only use the last but an average */
|
2010-05-20 21:26:42 +00:00
|
|
|
if (abs(last_fb->freq_diff) < fbs.req.freq_err_thresh1 &&
|
2010-06-20 15:26:27 +00:00
|
|
|
last_fb->snr > FB0_SNR_THRESH) {
|
|
|
|
/* continue with FB1 task in DSP */
|
2010-05-19 19:41:24 +00:00
|
|
|
tdma_schedule_set(1, fb_sched_set, 1);
|
2010-06-20 15:26:27 +00:00
|
|
|
} else {
|
|
|
|
if (fbs.afc_retries < AFC_RETRY_COUNT) {
|
|
|
|
tdma_schedule_set(1, fb_sched_set, 0);
|
|
|
|
fbs.afc_retries++;
|
|
|
|
} else {
|
|
|
|
/* Abort */
|
|
|
|
last_fb->attempt = 13;
|
|
|
|
l1s_compl_sched(L1_COMPL_FB);
|
|
|
|
}
|
2010-05-19 19:41:24 +00:00
|
|
|
}
|
|
|
|
} else
|
|
|
|
l1s_compl_sched(L1_COMPL_FB);
|
|
|
|
} else if (fb_mode == 1) {
|
|
|
|
if (fbs.req.flags & L1CTL_FBSB_F_SB) {
|
2010-05-20 21:26:42 +00:00
|
|
|
|
2010-05-19 19:41:24 +00:00
|
|
|
int ntdma, qbits;
|
|
|
|
/* FIXME: where did this magic 23 come from? */
|
|
|
|
last_fb->toa -= 23;
|
|
|
|
|
|
|
|
if (last_fb->toa < 0) {
|
|
|
|
qbits = (last_fb->toa + BITS_PER_TDMA) * 4;
|
|
|
|
ntdma = -1;
|
|
|
|
} else {
|
|
|
|
ntdma = (last_fb->toa) / BITS_PER_TDMA;
|
|
|
|
qbits = (last_fb->toa - ntdma * BITS_PER_TDMA) * 4;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int fn_offset = l1s.current_time.fn - last_fb->attempt + ntdma;
|
|
|
|
int delay = fn_offset + 11 - l1s.current_time.fn - 1;
|
2010-05-20 21:26:42 +00:00
|
|
|
printf(" fn_offset=%d (fn=%u + attempt=%u + ntdma = %d)\m",
|
|
|
|
fn_offset, l1s.current_time.fn, last_fb->attempt, ntdma);
|
|
|
|
printf(" delay=%d (fn_offset=%d + 11 - fn=%u - 1\n", delay,
|
|
|
|
fn_offset, l1s.current_time.fn);
|
|
|
|
printf(" scheduling next FB/SB detection task with delay %u\n", delay);
|
|
|
|
if (abs(last_fb->freq_diff) < fbs.req.freq_err_thresh2 &&
|
|
|
|
last_fb->snr > FB1_SNR_THRESH) {
|
2010-05-19 19:41:24 +00:00
|
|
|
/* synchronize before reading SB */
|
2010-05-20 21:26:42 +00:00
|
|
|
fbinfo2cellinfo(&l1s.serving_cell, last_fb);
|
2010-05-19 19:41:24 +00:00
|
|
|
synchronize_tdma(&l1s.serving_cell);
|
|
|
|
tdma_schedule_set(delay, sb_sched_set, 0);
|
|
|
|
} else
|
|
|
|
tdma_schedule_set(delay, fb_sched_set, 1);
|
|
|
|
} else
|
|
|
|
l1s_compl_sched(L1_COMPL_FB);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
2010-04-09 19:32:56 +00:00
|
|
|
}
|
|
|
|
|
2010-05-19 19:41:24 +00:00
|
|
|
/* FB detection */
|
|
|
|
static const struct tdma_sched_item fb_sched_set[] = {
|
|
|
|
SCHED_ITEM(l1s_fbdet_cmd, 0, 0), SCHED_END_FRAME(),
|
|
|
|
SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 1), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 2), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 3), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 4), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 5), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 6), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 7), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 8), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 9), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 10), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 11), SCHED_END_FRAME(),
|
|
|
|
SCHED_ITEM(l1s_fbdet_resp, 0, 12), SCHED_END_FRAME(),
|
|
|
|
SCHED_END_SET()
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Asynchronous completion handler for FB detection */
|
|
|
|
static void l1a_fb_compl(__unused enum l1_compl c)
|
|
|
|
{
|
|
|
|
struct l1_cell_info *cinfo = &l1s.serving_cell;
|
|
|
|
|
|
|
|
if (last_fb->attempt >= 13) {
|
|
|
|
/* FB detection failed, signal this via L1CTL */
|
|
|
|
return l1ctl_fbsb_resp(255);
|
|
|
|
}
|
|
|
|
|
2010-05-20 21:26:42 +00:00
|
|
|
/* FIME: use l1s.neigh_cell[fbs.cinfo_idx] */
|
|
|
|
fbinfo2cellinfo(&l1s.serving_cell, last_fb);
|
2010-04-09 19:32:56 +00:00
|
|
|
|
2010-06-20 17:10:21 +00:00
|
|
|
/* send FBSB_CONF success message via L1CTL */
|
2010-05-19 19:41:24 +00:00
|
|
|
l1ctl_fbsb_resp(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
void l1s_fbsb_req(uint8_t base_fn, struct l1ctl_fbsb_req *req)
|
|
|
|
{
|
|
|
|
/* copy + endian convert request data */
|
|
|
|
fbs.req.band_arfcn = ntohs(req->band_arfcn);
|
|
|
|
fbs.req.timeout = ntohs(req->timeout);
|
|
|
|
fbs.req.freq_err_thresh1 = ntohs(req->freq_err_thresh1);
|
|
|
|
fbs.req.freq_err_thresh2 = ntohs(req->freq_err_thresh2);
|
|
|
|
fbs.req.num_freqerr_avg = req->num_freqerr_avg;
|
|
|
|
fbs.req.flags = req->flags;
|
|
|
|
fbs.req.sync_info_idx = req->sync_info_idx;
|
|
|
|
|
|
|
|
/* clear initial frequency error */
|
|
|
|
fbs.initial_freq_err = 0;
|
2010-06-20 15:05:01 +00:00
|
|
|
fbs.fb_retries = 0;
|
2010-05-19 19:41:24 +00:00
|
|
|
|
2010-05-20 21:26:42 +00:00
|
|
|
/* Make sure we start at a 'center' AFCDAC output value */
|
|
|
|
afc_reset();
|
|
|
|
|
2010-05-19 19:41:24 +00:00
|
|
|
if (fbs.req.flags & L1CTL_FBSB_F_FB0)
|
|
|
|
tdma_schedule_set(base_fn, fb_sched_set, 0);
|
|
|
|
else if (fbs.req.flags & L1CTL_FBSB_F_FB1)
|
|
|
|
tdma_schedule_set(base_fn, fb_sched_set, 0);
|
|
|
|
else if (fbs.req.flags & L1CTL_FBSB_F_SB)
|
|
|
|
tdma_schedule_set(base_fn, sb_sched_set, 0);
|
|
|
|
|
2010-06-24 11:30:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static __attribute__ ((constructor)) void l1s_prim_fbsb_init(void)
|
|
|
|
{
|
2010-05-19 19:41:24 +00:00
|
|
|
l1s.completion[L1_COMPL_FB] = &l1a_fb_compl;
|
|
|
|
}
|