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/* Layer 1 Power Measurement */
/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <defines.h>
#include <debug.h>
#include <memory.h>
#include <byteorder.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/core/msgb.h>
#include <calypso/dsp_api.h>
#include <calypso/irq.h>
#include <calypso/tpu.h>
#include <calypso/tsp.h>
#include <calypso/dsp.h>
#include <calypso/timer.h>
#include <comm/sercomm.h>
#include <asm/system.h>
#include <layer1/sync.h>
#include <layer1/agc.h>
#include <layer1/tdma_sched.h>
#include <layer1/tpu_window.h>
#include <layer1/l23_api.h>
#include <layer1/prim.h>
#include <rffe.h>
#include <l1ctl_proto.h>
static void l1ddsp_meas_read(uint8_t nbmeas, uint16_t *pm)
{
uint8_t i;
for (i = 0; i < nbmeas; i++)
pm[i] = (uint16_t) ((dsp_api.db_r->a_pm[i] & 0xffff) >> 3);
dsp_api.r_page_used = 1;
}
/* scheduler callback to issue a power measurement task to the DSP */
static int l1s_pm_cmd(uint8_t num_meas,
__unused uint8_t p2, uint16_t arfcn)
{
putchart('P');
dsp_api.db_w->d_task_md = num_meas; /* number of measurements */
dsp_api.ndb->d_fb_mode = 0; /* wideband search */
/* Tell the RF frontend to set the gain appropriately */
rffe_compute_gain(-85, CAL_DSP_TGT_BB_LVL);
/* Program TPU */
/* FIXME: RXWIN_PW needs to set up multiple times in case
* num_meas > 1 */
l1s_rx_win_ctrl(arfcn, L1_RXWIN_PW, 0);
//l1s_rx_win_ctrl(arfcn, L1_RXWIN_NB);
return 0;
}
/* scheduler callback to read power measurement resposnse from the DSP */
static int l1s_pm_resp(uint8_t num_meas, __unused uint8_t p2,
uint16_t arfcn)
{
struct l1ctl_pm_conf *pmr;
uint16_t pm_level[2];
putchart('p');
l1ddsp_meas_read(num_meas, pm_level);
printf("PM MEAS: ARFCN=%u, %-4d dBm at baseband, %-4d dBm at RF\n",
arfcn, pm_level[0]/8, agc_inp_dbm8_by_pm(pm_level[0])/8);
printd("PM MEAS: %-4d dBm, %-4d dBm ARFCN=%u\n",
agc_inp_dbm8_by_pm(pm_level[0])/8,
agc_inp_dbm8_by_pm(pm_level[1])/8, arfcn);
if (!l1s.pm.msg)
l1s.pm.msg = l1ctl_msgb_alloc(L1CTL_PM_CONF);
if (msgb_tailroom(l1s.pm.msg) < sizeof(*pmr)) {
/* flush current msgb */
l1_queue_for_l2(l1s.pm.msg);
/* allocate a new msgb and initialize header */
l1s.pm.msg = l1ctl_msgb_alloc(L1CTL_PM_CONF);
}
pmr = msgb_put(l1s.pm.msg, sizeof(*pmr));
pmr->band_arfcn = htons(arfcn);
/* FIXME: do this as RxLev rather than DBM8 ? */
pmr->pm[0] = dbm2rxlev(agc_inp_dbm8_by_pm(pm_level[0])/8);
if (num_meas > 1)
pmr->pm[1] = dbm2rxlev(agc_inp_dbm8_by_pm(pm_level[1])/8);
else
pmr->pm[1] = 0;
if (l1s.pm.mode == 1) {
if (l1s.pm.range.arfcn_next != l1s.pm.range.arfcn_end) {
/* schedule PM for next ARFCN in range */
l1s.pm.range.arfcn_next =
(l1s.pm.range.arfcn_next+1) & 0xfbff;
l1s_pm_test(1, l1s.pm.range.arfcn_next);
} else {
/* we have finished, flush the msgb to L2 */
struct l1ctl_hdr *l1h = l1s.pm.msg->l1h;
l1h->flags |= L1CTL_F_DONE;
l1_queue_for_l2(l1s.pm.msg);
l1s.pm.msg = NULL;
}
}
return 0;
}
static const struct tdma_sched_item pm_sched_set[] = {
SCHED_ITEM_DT(l1s_pm_cmd, 0, 1, 0), SCHED_END_FRAME(),
SCHED_END_FRAME(),
SCHED_ITEM(l1s_pm_resp, -4, 1, 0), SCHED_END_FRAME(),
SCHED_END_SET()
};
/* Schedule a power measurement test */
void l1s_pm_test(uint8_t base_fn, uint16_t arfcn)
{
unsigned long flags;
printd("l1s_pm_test(%u, %u)\n", base_fn, arfcn);
local_firq_save(flags);
tdma_schedule_set(base_fn, pm_sched_set, arfcn);
local_irq_restore(flags);
}
/*
* perform measurements of neighbour cells
*/
/* scheduler callback to issue a power measurement task to the DSP */
static int l1s_neigh_pm_cmd(uint8_t num_meas,
__unused uint8_t p2, __unused uint16_t p3)
{
uint8_t last_gain = rffe_get_gain();
dsp_api.db_w->d_task_md = num_meas; /* number of measurements */
// dsp_api.ndb->d_fb_mode = 0; /* wideband search */
/* Tell the RF frontend to set the gain appropriately (keep last) */
rffe_compute_gain(-85, CAL_DSP_TGT_BB_LVL);
/* Program TPU */
/* FIXME: RXWIN_PW needs to set up multiple times in case
* num_meas > 1 */
/* do measurement dummy, in case l1s.neigh_pm.n == 0 */
l1s_rx_win_ctrl((l1s.neigh_pm.n) ?
l1s.neigh_pm.band_arfcn[l1s.neigh_pm.pos] : 0, L1_RXWIN_PW, 0);
/* restore last gain */
rffe_set_gain(last_gain);
l1s.neigh_pm.running = 1;
return 0;
}
/* scheduler callback to read power measurement resposnse from the DSP */
static int l1s_neigh_pm_resp(__unused uint8_t p1, __unused uint8_t p2,
__unused uint16_t p3)
{
uint16_t dbm;
uint8_t level;
dsp_api.r_page_used = 1;
if (l1s.neigh_pm.n == 0 || !l1s.neigh_pm.running)
goto out;
dbm = (uint16_t) ((dsp_api.db_r->a_pm[0] & 0xffff) >> 3);
level = dbm2rxlev(agc_inp_dbm8_by_pm(dbm)/8);
l1s.neigh_pm.level[l1s.neigh_pm.pos] = level;
if (++l1s.neigh_pm.pos >= l1s.neigh_pm.n) {
struct msgb *msg;
struct l1ctl_neigh_pm_ind *mi;
int i;
l1s.neigh_pm.pos = 0;
/* return result */
msg = l1ctl_msgb_alloc(L1CTL_NEIGH_PM_IND);
for (i = 0; i < l1s.neigh_pm.n; i++) {
if (msgb_tailroom(msg) < (int) sizeof(*mi)) {
l1_queue_for_l2(msg);
msg = l1ctl_msgb_alloc(L1CTL_NEIGH_PM_IND);
}
mi = (struct l1ctl_neigh_pm_ind *)
msgb_put(msg, sizeof(*mi));
mi->band_arfcn = htons(l1s.neigh_pm.band_arfcn[i]);
mi->pm[0] = l1s.neigh_pm.level[i];
mi->pm[1] = 0;
}
l1_queue_for_l2(msg);
}
out:
l1s.neigh_pm.running = 0;
return 0;
}
const struct tdma_sched_item neigh_pm_sched_set[] = {
SCHED_ITEM_DT(l1s_neigh_pm_cmd, 0, 1, 0), SCHED_END_FRAME(),
SCHED_END_FRAME(),
SCHED_ITEM(l1s_neigh_pm_resp, -4, 1, 0), SCHED_END_FRAME(),
SCHED_END_SET()
};
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