1 /* Layer 1 Power Measurement */
3 /* (C) 2010 by Harald Welte <laforge@gnumonks.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
31 #include <byteorder.h>
32 #include <osmocore/gsm_utils.h>
33 #include <osmocore/msgb.h>
34 #include <calypso/dsp_api.h>
35 #include <calypso/irq.h>
36 #include <calypso/tpu.h>
37 #include <calypso/tsp.h>
38 #include <calypso/dsp.h>
39 #include <calypso/timer.h>
40 #include <comm/sercomm.h>
42 #include <layer1/sync.h>
43 #include <layer1/agc.h>
44 #include <layer1/tdma_sched.h>
45 #include <layer1/tpu_window.h>
46 #include <layer1/l23_api.h>
48 #include <l1ctl_proto.h>
50 static void l1ddsp_meas_read(uint8_t nbmeas, uint16_t *pm)
54 for (i = 0; i < nbmeas; i++)
55 pm[i] = (uint16_t) ((dsp_api.db_r->a_pm[i] & 0xffff) >> 3);
56 dsp_api.r_page_used = 1;
59 /* scheduler callback to issue a power measurement task to the DSP */
60 static int l1s_pm_cmd(uint8_t num_meas,
61 __unused uint8_t p2, uint16_t arfcn)
65 dsp_api.db_w->d_task_md = num_meas; /* number of measurements */
66 dsp_api.ndb->d_fb_mode = 0; /* wideband search */
69 /* Tell the RF frontend to set the gain appropriately */
70 rffe_set_gain(-85, CAL_DSP_TGT_BB_LVL);
73 /* FIXME: RXWIN_PW needs to set up multiple times in case
75 l1s_rx_win_ctrl(arfcn, L1_RXWIN_PW, 0);
76 //l1s_rx_win_ctrl(arfcn, L1_RXWIN_NB);
82 /* scheduler callback to read power measurement resposnse from the DSP */
83 static int l1s_pm_resp(uint8_t num_meas, __unused uint8_t p2,
86 struct l1ctl_pm_conf *pmr;
91 l1ddsp_meas_read(num_meas, pm_level);
93 printf("PM MEAS: ARFCN=%u, %-4d dBm at baseband, %-4d dBm at RF\n",
94 arfcn, pm_level[0]/8, agc_inp_dbm8_by_pm(pm_level[0])/8);
96 printd("PM MEAS: %-4d dBm, %-4d dBm ARFCN=%u\n",
97 agc_inp_dbm8_by_pm(pm_level[0])/8,
98 agc_inp_dbm8_by_pm(pm_level[1])/8, arfcn);
101 l1s.pm.msg = l1ctl_msgb_alloc(L1CTL_PM_CONF);
103 if (msgb_tailroom(l1s.pm.msg) < sizeof(*pmr)) {
104 /* flush current msgb */
105 l1_queue_for_l2(l1s.pm.msg);
106 /* allocate a new msgb and initialize header */
107 l1s.pm.msg = l1ctl_msgb_alloc(L1CTL_PM_CONF);
110 pmr = msgb_put(l1s.pm.msg, sizeof(*pmr));
111 pmr->band_arfcn = htons(arfcn);
112 /* FIXME: do this as RxLev rather than DBM8 ? */
113 pmr->pm[0] = dbm2rxlev(agc_inp_dbm8_by_pm(pm_level[0])/8);
115 pmr->pm[1] = dbm2rxlev(agc_inp_dbm8_by_pm(pm_level[1])/8);
119 if (l1s.pm.mode == 1) {
120 if (l1s.pm.range.arfcn_next <= l1s.pm.range.arfcn_end) {
121 /* schedule PM for next ARFCN in range */
122 l1s_pm_test(1, l1s.pm.range.arfcn_next);
123 l1s.pm.range.arfcn_next++;
125 /* we have finished, flush the msgb to L2 */
126 struct l1ctl_hdr *l1h = l1s.pm.msg->l1h;
127 l1h->flags |= L1CTL_F_DONE;
128 l1_queue_for_l2(l1s.pm.msg);
136 static const struct tdma_sched_item pm_sched_set[] = {
137 SCHED_ITEM(l1s_pm_cmd, 1, 0), SCHED_END_FRAME(),
139 SCHED_ITEM(l1s_pm_resp, 1, 0), SCHED_END_FRAME(),
143 /* Schedule a power measurement test */
144 void l1s_pm_test(uint8_t base_fn, uint16_t arfcn)
146 printd("l1s_pm_test(%u, %u)\n", base_fn, arfcn);
147 tdma_schedule_set(base_fn, pm_sched_set, arfcn);