mirror of https://gerrit.osmocom.org/simtrace2
128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/* Code to control the PERST lines of attached modems
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
|
|
*/
|
|
/* Depending on the board this is running on, it might be possible
|
|
* for the controller to set the status of the PERST input line of
|
|
* the cellular modem. If the board supports this, it sets the
|
|
* PIN_PERST1 and/or PIN_PERST2 defines in its board.h file.
|
|
*/
|
|
#include "board.h"
|
|
#include "trace.h"
|
|
#include "wwan_perst.h"
|
|
#include <osmocom/core/timer.h>
|
|
|
|
struct wwan_perst {
|
|
uint8_t idx;
|
|
const Pin pin;
|
|
struct osmo_timer_list timer;
|
|
};
|
|
|
|
#ifdef PIN_PERST1
|
|
static struct wwan_perst perst1 = {
|
|
.idx = 0,
|
|
.pin = PIN_PERST1,
|
|
};
|
|
#endif
|
|
|
|
#ifdef PIN_PERST2
|
|
static struct wwan_perst perst2 = {
|
|
.idx = 1,
|
|
.pin = PIN_PERST2,
|
|
};
|
|
#endif
|
|
|
|
static int initialized = 0;
|
|
|
|
static void perst_tmr_cb(void *data)
|
|
{
|
|
struct wwan_perst *perst = data;
|
|
/* release the (low-active) reset */
|
|
TRACE_INFO("%u: De-asserting modem reset\r\n", perst->idx);
|
|
PIO_Clear(&perst->pin);
|
|
}
|
|
|
|
static struct wwan_perst *get_perst_for_modem(int modem_nr)
|
|
{
|
|
if (!initialized) {
|
|
TRACE_ERROR("Somebody forgot to call wwan_perst_init()\r\n");
|
|
wwan_perst_init();
|
|
}
|
|
|
|
switch (modem_nr) {
|
|
#ifdef PIN_PERST1
|
|
case 0:
|
|
return &perst1;
|
|
#endif
|
|
#ifdef PIN_PERST2
|
|
case 1:
|
|
return &perst2;
|
|
#endif
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
int wwan_perst_do_reset_pulse(int modem_nr, unsigned int duration_ms)
|
|
{
|
|
struct wwan_perst *perst = get_perst_for_modem(modem_nr);
|
|
if (!perst)
|
|
return -1;
|
|
|
|
TRACE_INFO("%u: Asserting modem reset\r\n", modem_nr);
|
|
PIO_Set(&perst->pin);
|
|
osmo_timer_schedule(&perst->timer, duration_ms/1000, (duration_ms%1000)*1000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int wwan_perst_set(int modem_nr, int active)
|
|
{
|
|
struct wwan_perst *perst = get_perst_for_modem(modem_nr);
|
|
if (!perst)
|
|
return -1;
|
|
|
|
osmo_timer_del(&perst->timer);
|
|
if (active) {
|
|
TRACE_INFO("%u: Asserting modem reset\r\n", modem_nr);
|
|
PIO_Set(&perst->pin);
|
|
} else {
|
|
TRACE_INFO("%u: De-asserting modem reset\r\n", modem_nr);
|
|
PIO_Clear(&perst->pin);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int wwan_perst_init(void)
|
|
{
|
|
int num_perst = 0;
|
|
#ifdef PIN_PERST1
|
|
PIO_Configure(&perst1.pin, 1);
|
|
perst1.timer.cb = perst_tmr_cb;
|
|
perst1.timer.data = (void *) &perst1;
|
|
num_perst++;
|
|
#endif
|
|
|
|
#ifdef PIN_PERST2
|
|
PIO_Configure(&perst2.pin, 1);
|
|
perst2.timer.cb = perst_tmr_cb;
|
|
perst2.timer.data = (void *) &perst2;
|
|
num_perst++;
|
|
#endif
|
|
initialized = 1;
|
|
return num_perst;
|
|
}
|