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Alex Badea vamposdecampos at gmail.comAdd a .cbch_mode member to struct l1ctl_dm_est_req. If set, this
instructs L1 to use the CBCH variant of SDCCH for dedicated mode (no
uplink, no SACCH).
Add the new cbch_mode flag to l1ctl_tx_dm_est_req* API calls. Clear it
everywhere, except for app_cbch_sniff.
Signed-off-by: Alex Badea <vamposdecampos at gmail.com>
---
The extra struct member might be a bit excessive; an alternative would
be to abuse audio_mode, which is not used for signalling channels.
include/l1ctl_proto.h | 1 +
src/host/layer23/include/osmocom/bb/common/l1ctl.h | 5 +++--
src/host/layer23/src/common/l1ctl.c | 6 ++++--
src/host/layer23/src/misc/app_cbch_sniff.c | 4 ++--
src/host/layer23/src/mobile/gsm48_rr.c | 4 ++--
src/target/firmware/include/layer1/mframe_sched.h | 3 +++
src/target/firmware/layer1/l23_api.c | 12 +++++++-----
src/target/firmware/layer1/mframe_sched.c | 14 ++++++++++++++
8 files changed, 36 insertions(+), 13 deletions(-)
diff --git a/include/l1ctl_proto.h b/include/l1ctl_proto.h
index 771bf1c..55f0ffc 100644
--- a/include/l1ctl_proto.h
+++ b/include/l1ctl_proto.h
@@ -233,6 +233,7 @@ struct l1ctl_dm_est_req {
};
uint8_t tch_mode;
uint8_t audio_mode;
+ uint8_t cbch_mode;
} __attribute__((packed));
struct l1ctl_dm_freq_req {
diff --git a/src/host/layer23/include/osmocom/bb/common/l1ctl.h b/src/host/layer23/include/osmocom/bb/common/l1ctl.h
index 46a333e..f25a516 100644
--- a/src/host/layer23/include/osmocom/bb/common/l1ctl.h
+++ b/src/host/layer23/include/osmocom/bb/common/l1ctl.h
@@ -25,10 +25,11 @@ int l1ctl_tx_rach_req(struct osmocom_ms *ms, uint8_t ra, uint16_t offset,
/* Transmit L1CTL_DM_EST_REQ */
int l1ctl_tx_dm_est_req_h0(struct osmocom_ms *ms, uint16_t band_arfcn,
- uint8_t chan_nr, uint8_t tsc, uint8_t tch_mode, uint8_t audio_mode);
+ uint8_t chan_nr, uint8_t tsc, uint8_t tch_mode, uint8_t audio_mode,
+ uint8_t cbch_mode);
int l1ctl_tx_dm_est_req_h1(struct osmocom_ms *ms, uint8_t maio, uint8_t hsn,
uint16_t *ma, uint8_t ma_len, uint8_t chan_nr, uint8_t tsc,
- uint8_t tch_mode, uint8_t audio_mode);
+ uint8_t tch_mode, uint8_t audio_mode, uint8_t cbch_mode);
/* Transmit L1CTL_DM_FREQ_REQ */
int l1ctl_tx_dm_freq_req_h0(struct osmocom_ms *ms, uint16_t band_arfcn,
diff --git a/src/host/layer23/src/common/l1ctl.c b/src/host/layer23/src/common/l1ctl.c
index 5898b22..57003af 100644
--- a/src/host/layer23/src/common/l1ctl.c
+++ b/src/host/layer23/src/common/l1ctl.c
@@ -461,7 +461,7 @@ int l1ctl_tx_rach_req(struct osmocom_ms *ms, uint8_t ra, uint16_t offset,
/* Transmit L1CTL_DM_EST_REQ */
int l1ctl_tx_dm_est_req_h0(struct osmocom_ms *ms, uint16_t band_arfcn,
uint8_t chan_nr, uint8_t tsc, uint8_t tch_mode,
- uint8_t audio_mode)
+ uint8_t audio_mode, uint8_t cbch_mode)
{
struct msgb *msg;
struct l1ctl_info_ul *ul;
@@ -484,6 +484,7 @@ int l1ctl_tx_dm_est_req_h0(struct osmocom_ms *ms, uint16_t band_arfcn,
req->h0.band_arfcn = htons(band_arfcn);
req->tch_mode = tch_mode;
req->audio_mode = audio_mode;
+ req->cbch_mode = cbch_mode;
return osmo_send_l1(ms, msg);
}
@@ -491,7 +492,7 @@ int l1ctl_tx_dm_est_req_h0(struct osmocom_ms *ms, uint16_t band_arfcn,
int l1ctl_tx_dm_est_req_h1(struct osmocom_ms *ms, uint8_t maio, uint8_t hsn,
uint16_t *ma, uint8_t ma_len,
uint8_t chan_nr, uint8_t tsc, uint8_t tch_mode,
- uint8_t audio_mode)
+ uint8_t audio_mode, uint8_t cbch_mode)
{
struct msgb *msg;
struct l1ctl_info_ul *ul;
@@ -519,6 +520,7 @@ int l1ctl_tx_dm_est_req_h1(struct osmocom_ms *ms, uint8_t maio, uint8_t hsn,
req->h1.ma[i] = htons(ma[i]);
req->tch_mode = tch_mode;
req->audio_mode = audio_mode;
+ req->cbch_mode = cbch_mode;
return osmo_send_l1(ms, msg);
}
diff --git a/src/host/layer23/src/misc/app_cbch_sniff.c b/src/host/layer23/src/misc/app_cbch_sniff.c
index 8256eaf..6df2f11 100644
--- a/src/host/layer23/src/misc/app_cbch_sniff.c
+++ b/src/host/layer23/src/misc/app_cbch_sniff.c
@@ -57,12 +57,12 @@ static int try_cbch(struct osmocom_ms *ms, struct gsm48_sysinfo *s)
return l1ctl_tx_dm_est_req_h1(ms,
s->maio, s->hsn, s->hopping, s->hopp_len,
s->chan_nr, s->tsc,
- GSM48_CMODE_SIGN, 0);
+ GSM48_CMODE_SIGN, 0, 1);
} else {
LOGP(DRR, LOGL_INFO, "chan_nr = 0x%02x TSC = %d ARFCN = %d\n",
s->chan_nr, s->tsc, s->arfcn);
return l1ctl_tx_dm_est_req_h0(ms, s->arfcn,
- s->chan_nr, s->tsc, GSM48_CMODE_SIGN, 0);
+ s->chan_nr, s->tsc, GSM48_CMODE_SIGN, 0, 1);
}
}
diff --git a/src/host/layer23/src/mobile/gsm48_rr.c b/src/host/layer23/src/mobile/gsm48_rr.c
index 3d15494..a21758c 100644
--- a/src/host/layer23/src/mobile/gsm48_rr.c
+++ b/src/host/layer23/src/mobile/gsm48_rr.c
@@ -3002,10 +3002,10 @@ static int gsm48_rr_activate_channel(struct osmocom_ms *ms,
if (cd->h)
l1ctl_tx_dm_est_req_h1(ms, cd->maio, cd->hsn,
ma, ma_len, cd->chan_nr, cd->tsc, cd->mode,
- rr->audio_mode);
+ rr->audio_mode, 0);
else
l1ctl_tx_dm_est_req_h0(ms, cd->arfcn, cd->chan_nr, cd->tsc,
- cd->mode, rr->audio_mode);
+ cd->mode, rr->audio_mode, 0);
rr->dm_est = 1;
/* old SI 5/6 are not valid on a new dedicated channel */
diff --git a/src/target/firmware/include/layer1/mframe_sched.h b/src/target/firmware/include/layer1/mframe_sched.h
index ecdb1ec..74e2d27 100644
--- a/src/target/firmware/include/layer1/mframe_sched.h
+++ b/src/target/firmware/include/layer1/mframe_sched.h
@@ -23,6 +23,9 @@ enum mframe_task {
MF_TASK_SDCCH8_6,
MF_TASK_SDCCH8_7,
+ MF_TASK_SDCCH4_CBCH,
+ MF_TASK_SDCCH8_CBCH,
+
MF_TASK_TCH_F_EVEN,
MF_TASK_TCH_F_ODD,
MF_TASK_TCH_H_0,
diff --git a/src/target/firmware/layer1/l23_api.c b/src/target/firmware/layer1/l23_api.c
index ae39e63..215fc00 100644
--- a/src/target/firmware/layer1/l23_api.c
+++ b/src/target/firmware/layer1/l23_api.c
@@ -72,7 +72,7 @@ enum mf_type {
MF26ODD,
MF26EVEN
};
-static uint32_t chan_nr2mf_task_mask(uint8_t chan_nr, uint8_t neigh_mode)
+static uint32_t chan_nr2mf_task_mask(uint8_t chan_nr, uint8_t neigh_mode, uint8_t cbch)
{
uint8_t cbits = chan_nr >> 3;
uint8_t tn = chan_nr & 0x7;
@@ -90,11 +90,11 @@ static uint32_t chan_nr2mf_task_mask(uint8_t chan_nr, uint8_t neigh_mode)
master_task = MF_TASK_TCH_H_0 + lch_idx;
} else if ((cbits & 0x1c) == 0x04) {
lch_idx = cbits & 0x3;
- master_task = MF_TASK_SDCCH4_0 + lch_idx;
+ master_task = cbch ? MF_TASK_SDCCH4_CBCH : (MF_TASK_SDCCH4_0 + lch_idx);
multiframe = MF51;
} else if ((cbits & 0x18) == 0x08) {
lch_idx = cbits & 0x7;
- master_task = MF_TASK_SDCCH8_0 + lch_idx;
+ master_task = cbch ? MF_TASK_SDCCH8_CBCH : (MF_TASK_SDCCH8_0 + lch_idx);
multiframe = MF51;
#if 0
} else if (cbits == 0x10) {
@@ -225,7 +225,8 @@ static void l1ctl_rx_dm_est_req(struct msgb *msg)
struct l1ctl_info_ul *ul = (struct l1ctl_info_ul *) l1h->data;
struct l1ctl_dm_est_req *est_req = (struct l1ctl_dm_est_req *) ul->payload;
- printd("L1CTL_DM_EST_REQ (arfcn=%u, chan_nr=0x%02x, tsc=%u)\n",
+ printd("L1CTL_DM_EST_REQ %s(arfcn=%u, chan_nr=0x%02x, tsc=%u)\n",
+ est_req->cbch_mode ? "CBCH " : "",
ntohs(est_req->h0.band_arfcn), ul->chan_nr, est_req->tsc);
/* disable neighbour cell measurement of C0 TS 0 */
@@ -262,7 +263,8 @@ static void l1ctl_rx_dm_est_req(struct msgb *msg)
}
/* figure out which MF tasks to enable */
- l1a_mftask_set(chan_nr2mf_task_mask(ul->chan_nr, NEIGH_MODE_PM));
+ l1a_mftask_set(chan_nr2mf_task_mask(ul->chan_nr, NEIGH_MODE_PM,
+ est_req->cbch_mode));
}
/* receive a L1CTL_DM_FREQ_REQ from L23 */
diff --git a/src/target/firmware/layer1/mframe_sched.c b/src/target/firmware/layer1/mframe_sched.c
index f3a6b43..0a9ff1e 100644
--- a/src/target/firmware/layer1/mframe_sched.c
+++ b/src/target/firmware/layer1/mframe_sched.c
@@ -198,6 +198,15 @@ static const struct mframe_sched_item mf_sdcch8_7[] = {
{ .sched_set = NULL }
};
+static const struct mframe_sched_item mf_sdcch8_cbch[] = {
+ { .sched_set = NB_QUAD_FH_DL, .modulo = 51, .frame_nr = 8 },
+ { .sched_set = NULL }
+};
+static const struct mframe_sched_item mf_sdcch4_cbch[] = {
+ { .sched_set = NB_QUAD_DL, .modulo = 51, .frame_nr = 32 },
+ { .sched_set = NULL }
+};
+
/* Measurement for MF 51 C0 */
static const struct mframe_sched_item mf_neigh_pm51_c0t0[] = {
{ .sched_set = NEIGH_PM , .modulo = 51, .frame_nr = 0 },
@@ -327,6 +336,9 @@ static const struct mframe_sched_item *sched_set_for_task[32] = {
[MF_TASK_SDCCH8_6] = mf_sdcch8_6,
[MF_TASK_SDCCH8_7] = mf_sdcch8_7,
+ [MF_TASK_SDCCH4_CBCH] = mf_sdcch4_cbch,
+ [MF_TASK_SDCCH8_CBCH] = mf_sdcch8_cbch,
+
[MF_TASK_TCH_F_EVEN] = mf_tch_f_even,
[MF_TASK_TCH_F_ODD] = mf_tch_f_odd,
[MF_TASK_TCH_H_0] = mf_tch_h_0,
@@ -361,6 +373,7 @@ uint8_t mframe_task2chan_nr(enum mframe_task mft, uint8_t ts)
cbits = 0x04 + 1;
break;
case MF_TASK_SDCCH4_2:
+ case MF_TASK_SDCCH4_CBCH:
cbits = 0x04 + 2;
break;
case MF_TASK_SDCCH4_3:
@@ -373,6 +386,7 @@ uint8_t mframe_task2chan_nr(enum mframe_task mft, uint8_t ts)
cbits = 0x08 + 1;
break;
case MF_TASK_SDCCH8_2:
+ case MF_TASK_SDCCH8_CBCH:
cbits = 0x08 + 2;
break;
case MF_TASK_SDCCH8_3:
--
1.7.0.4