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/* NuRAN Wireless Litecell 1.5 BTS L1 calibration file routines*/
/* Copyright (C) 2015 by Yves Godin <support@nuranwireless.com>
* Copyright (C) 2016 by Harald Welte <laforge@gnumonks.org>
*
* Based on sysmoBTS:
* (C) 2012 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 Affero General Public License as published by
* the Free Software Foundation; either version 3 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 Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include <osmocom/core/utils.h>
#include <osmo-bts/gsm_data.h>
#include <osmo-bts/logging.h>
#include <nrw/litecell15/litecell15.h>
#include <nrw/litecell15/gsml1const.h>
#include "l1_if.h"
#include "lc15bts.h"
#include "utils.h"
struct calib_file_desc {
const char *fname;
int rx;
int trx;
int rxpath;
};
static const struct calib_file_desc calib_files[] = {
{
.fname = "calib_rx0a.conf",
.rx = 1,
.trx = 0,
.rxpath = 0,
}, {
.fname = "calib_rx0b.conf",
.rx = 1,
.trx = 0,
.rxpath = 1,
}, {
.fname = "calib_rx1a.conf",
.rx = 1,
.trx = 1,
.rxpath = 0,
}, {
.fname = "calib_rx1b.conf",
.rx = 1,
.trx = 1,
.rxpath = 1,
}, {
.fname = "calib_tx0.conf",
.rx = 0,
.trx = 0,
}, {
.fname = "calib_tx1.conf",
.rx = 0,
.trx = 1,
},
};
static int calib_file_send(struct lc15l1_hdl *fl1h,
const struct calib_file_desc *desc);
/* determine next calibration file index based on supported bands */
static int get_next_calib_file_idx(struct lc15l1_hdl *fl1h, int last_idx)
{
struct phy_link *plink = fl1h->phy_inst->phy_link;
int i;
for (i = last_idx+1; i < ARRAY_SIZE(calib_files); i++) {
if (calib_files[i].trx == plink->num)
return i;
}
return -1;
}
static int calib_file_open(struct lc15l1_hdl *fl1h,
const struct calib_file_desc *desc)
{
struct calib_send_state *st = &fl1h->st;
char *calib_path = fl1h->phy_inst->u.lc15.calib_path;
char fname[PATH_MAX];
if (st->fp) {
LOGP(DL1C, LOGL_NOTICE, "L1 calibration file was left opened !!\n");
fclose(st->fp);
st->fp = NULL;
}
fname[0] = '\0';
snprintf(fname, sizeof(fname)-1, "%s/%s", calib_path, desc->fname);
fname[sizeof(fname)-1] = '\0';
st->fp = fopen(fname, "rb");
if (!st->fp) {
LOGP(DL1C, LOGL_ERROR,
"Failed to open '%s' for calibration data.\n", fname);
return -1;
}
return 0;
}
static int calib_file_close(struct lc15l1_hdl *fl1h)
{
struct calib_send_state *st = &fl1h->st;
if (st->fp) {
fclose(st->fp);
st->fp = NULL;
}
return 0;
}
/* iteratively download the calibration data into the L1 */
static int calib_send_compl_cb(struct gsm_bts_trx *trx, struct msgb *l1_msg,
void *data);
/* send a chunk of calibration tabledata for a single specified file */
static int calib_file_send_next_chunk(struct lc15l1_hdl *fl1h)
{
struct calib_send_state *st = &fl1h->st;
Litecell15_Prim_t *prim;
struct msgb *msg;
size_t n;
msg = sysp_msgb_alloc();
prim = msgb_sysprim(msg);
prim->id = Litecell15_PrimId_SetCalibTblReq;
prim->u.setCalibTblReq.offset = (uint32_t)ftell(st->fp);
n = fread(prim->u.setCalibTblReq.u8Data, 1,
sizeof(prim->u.setCalibTblReq.u8Data), st->fp);
prim->u.setCalibTblReq.length = n;
if (n == 0) {
/* The table data has been completely sent and acknowledged */
LOGP(DL1C, LOGL_NOTICE, "L1 calibration table %s loaded\n",
calib_files[st->last_file_idx].fname);
calib_file_close(fl1h);
msgb_free(msg);
/* Send the next one if any */
st->last_file_idx = get_next_calib_file_idx(fl1h, st->last_file_idx);
if (st->last_file_idx >= 0) {
return calib_file_send(fl1h,
&calib_files[st->last_file_idx]);
}
LOGP(DL1C, LOGL_INFO, "L1 calibration table loading complete!\n");
return 0;
}
return l1if_req_compl(fl1h, msg, calib_send_compl_cb, NULL);
}
/* send the calibration table for a single specified file */
static int calib_file_send(struct lc15l1_hdl *fl1h,
const struct calib_file_desc *desc)
{
struct calib_send_state *st = &fl1h->st;
int rc;
rc = calib_file_open(fl1h, desc);
if (rc < 0) {
/* still, we'd like to continue trying to load
* calibration for all other bands */
st->last_file_idx = get_next_calib_file_idx(fl1h, st->last_file_idx);
if (st->last_file_idx >= 0)
return calib_file_send(fl1h,
&calib_files[st->last_file_idx]);
LOGP(DL1C, LOGL_INFO, "L1 calibration table loading complete!\n");
return 0;
}
return calib_file_send_next_chunk(fl1h);
}
/* completion callback after every SetCalibTbl is confirmed */
static int calib_send_compl_cb(struct gsm_bts_trx *trx, struct msgb *l1_msg,
void *data)
{
struct lc15l1_hdl *fl1h = trx_lc15l1_hdl(trx);
struct calib_send_state *st = &fl1h->st;
Litecell15_Prim_t *prim = msgb_sysprim(l1_msg);
if (prim->u.setCalibTblCnf.status != GsmL1_Status_Success) {
LOGP(DL1C, LOGL_ERROR, "L1 rejected calibration table\n");
msgb_free(l1_msg);
calib_file_close(fl1h);
/* Skip this one and try the next one */
st->last_file_idx = get_next_calib_file_idx(fl1h, st->last_file_idx);
if (st->last_file_idx >= 0) {
return calib_file_send(fl1h,
&calib_files[st->last_file_idx]);
}
LOGP(DL1C, LOGL_INFO, "L1 calibration table loading complete!\n");
return 0;
}
msgb_free(l1_msg);
/* Keep sending the calibration file data */
return calib_file_send_next_chunk(fl1h);
}
int calib_load(struct lc15l1_hdl *fl1h)
{
int rc;
struct calib_send_state *st = &fl1h->st;
char *calib_path = fl1h->phy_inst->u.lc15.calib_path;
if (!calib_path) {
LOGP(DL1C, LOGL_ERROR, "Calibration file path not specified\n");
return -1;
}
rc = get_next_calib_file_idx(fl1h, -1);
if (rc < 0) {
return -1;
}
st->last_file_idx = rc;
return calib_file_send(fl1h, &calib_files[st->last_file_idx]);
}
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