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drivers: modem: quectel-bg9x: fix reset BG95 mdm

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In case of BG95 where there is no reset pin, reseting the board
which uses a BG95 modem could result in powering-off the modem
(as oposed to "reset" the modem). This commit is an attempt
to handle this case and re-power the modem.

Signed-off-by: Andrei Hutanu <andrei.hutanu.i@gmail.com>
This commit is contained in:
Andrei Hutanu 2023-04-22 11:27:45 +02:00 committed by Anas Nashif
parent 3cf92bce11
commit 27ad7111cd
2 changed files with 26 additions and 0 deletions
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23
drivers/modem/quectel-bg9x.c
View file

@ -887,6 +887,13 @@ static void modem_rssi_query_work(struct k_work *work)
*/
static void pin_init(void)
{
#if !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios)
int ret = k_sem_take(&mdata.sem_pin_busy, K_SECONDS(3));
if (ret < 0) {
LOG_DBG("Timeout pin_init()");
}
#endif /* !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios) */
LOG_INF("Setting Modem Pins");
#if DT_INST_NODE_HAS_PROP(0, mdm_wdisable_gpios)
@ -910,6 +917,18 @@ static void pin_init(void)
k_sleep(K_SECONDS(2));
LOG_INF("... Done!");
#if !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios)
k_sem_give(&mdata.sem_pin_busy);
#endif /* !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios) */
}
MODEM_CMD_DEFINE(on_cmd_unsol_normal_power_down)
{
LOG_INF("Modem powering off. Re-power modem...");
pin_init();
return 0;
}
static const struct modem_cmd response_cmds[] = {
@ -922,6 +941,7 @@ static const struct modem_cmd unsol_cmds[] = {
MODEM_CMD("+QIURC: \"recv\",", on_cmd_unsol_recv, 1U, ""),
MODEM_CMD("+QIURC: \"closed\",", on_cmd_unsol_close, 1U, ""),
MODEM_CMD(MDM_UNSOL_RDY, on_cmd_unsol_rdy, 0U, ""),
MODEM_CMD("NORMAL POWER DOWN", on_cmd_unsol_normal_power_down, 0U, ""),
};
/* Commands sent to the modem to set it up at boot time. */
@ -1140,6 +1160,9 @@ static int modem_init(const struct device *dev)
{
int ret; ARG_UNUSED(dev);
#if !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios)
k_sem_init(&mdata.sem_pin_busy, 1, 1);
#endif /* !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios) */
k_sem_init(&mdata.sem_response, 0, 1);
k_sem_init(&mdata.sem_tx_ready, 0, 1);
k_sem_init(&mdata.sem_sock_conn, 0, 1);

3
drivers/modem/quectel-bg9x.h
View file

@ -114,6 +114,9 @@ struct modem_data {
struct k_sem sem_response;
struct k_sem sem_tx_ready;
struct k_sem sem_sock_conn;
#if !DT_INST_NODE_HAS_PROP(0, mdm_reset_gpios)
struct k_sem sem_pin_busy;
#endif
};
/* Socket read callback data */