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trxcon/l1ctl.c: handle hopping channels from L1CTL_DM_EST_REQ 

Change-Id: I8617b5808748bc4df3d7cc9862ed8cf12613f270
This commit is contained in:
Vadim Yanitskiy 2018-09-07 05:03:27 +07:00
parent db9198d236
commit 43fb867c78
1 changed files with 62 additions and 21 deletions
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83
src/host/trxcon/l1ctl.c
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@ -554,43 +554,84 @@ exit:
return rc;
}
static int l1ctl_proc_est_req_h0(struct trx_instance *trx, struct l1ctl_h0 *h)
{
uint16_t band_arfcn;
int rc = 0;
band_arfcn = ntohs(h->band_arfcn);
LOGP(DL1C, LOGL_NOTICE, "L1CTL_DM_EST_REQ indicates a single "
"ARFCN=%u channel\n", band_arfcn &~ ARFCN_FLAG_MASK);
/* Do we need to retune? */
if (trx->band_arfcn == band_arfcn)
return 0;
/* Tune transceiver to required ARFCN */
rc |= trx_if_cmd_rxtune(trx, band_arfcn);
rc |= trx_if_cmd_txtune(trx, band_arfcn);
if (rc)
return rc;
/* Update current ARFCN */
trx->band_arfcn = band_arfcn;
return 0;
}
static int l1ctl_proc_est_req_h1(struct trx_instance *trx, struct l1ctl_h1 *h)
{
int rc;
LOGP(DL1C, LOGL_NOTICE, "L1CTL_DM_EST_REQ indicates a Frequency "
"Hopping (hsn=%u, maio=%u, chans=%u) channel\n",
h->hsn, h->maio, h->n);
/* No channels?!? */
if (!h->n) {
LOGP(DL1C, LOGL_ERROR, "No channels in mobile allocation?!?\n");
return -EINVAL;
}
/* Forward hopping parameters to TRX */
rc = trx_if_cmd_setfh(trx, h->hsn, h->maio, h->ma, h->n);
if (rc)
return rc;
/**
* TODO: update the state of trx_instance somehow
* in order to indicate that it is in hopping mode...
*/
return 0;
}
static int l1ctl_rx_dm_est_req(struct l1ctl_link *l1l, struct msgb *msg)
{
enum gsm_phys_chan_config config;
struct l1ctl_dm_est_req *est_req;
struct l1ctl_info_ul *ul;
struct trx_ts *ts;
uint16_t band_arfcn;
uint8_t chan_nr, tn;
int rc = 0;
int rc;
ul = (struct l1ctl_info_ul *) msg->l1h;
est_req = (struct l1ctl_dm_est_req *) ul->payload;
band_arfcn = ntohs(est_req->h0.band_arfcn);
chan_nr = ul->chan_nr;
tn = chan_nr & 0x07;
LOGP(DL1C, LOGL_NOTICE, "Received L1CTL_DM_EST_REQ (arfcn=%u, "
"tn=%u, chan_nr=0x%02x, tsc=%u, tch_mode=0x%02x)\n",
(band_arfcn &~ ARFCN_FLAG_MASK), tn, chan_nr,
est_req->tsc, est_req->tch_mode);
LOGP(DL1C, LOGL_NOTICE, "Received L1CTL_DM_EST_REQ "
"(tn=%u, chan_nr=0x%02x, tsc=%u, tch_mode=0x%02x)\n",
tn, chan_nr, est_req->tsc, est_req->tch_mode);
if (est_req->h) {
LOGP(DL1C, LOGL_ERROR, "FHSS is not supported\n");
rc = -ENOTSUP;
/* Frequency hopping? */
if (est_req->h)
rc = l1ctl_proc_est_req_h1(l1l->trx, &est_req->h1);
else /* Single ARFCN */
rc = l1ctl_proc_est_req_h0(l1l->trx, &est_req->h0);
if (rc)
goto exit;
}
/* Only if the current ARFCN differs */
if (l1l->trx->band_arfcn != band_arfcn) {
/* Update current ARFCN */
l1l->trx->band_arfcn = band_arfcn;
/* Tune transceiver to required ARFCN */
trx_if_cmd_rxtune(l1l->trx, band_arfcn);
trx_if_cmd_txtune(l1l->trx, band_arfcn);
}
/* Update TSC (Training Sequence Code) */
l1l->trx->tsc = est_req->tsc;