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drivers: modem: gsm_ppp: Add support for Quectel modems

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Add support for Quectel modem in gsm_ppp modem driver.

The CMUX cmd is based on MUX application notes v1.0(2020-09-22)
for BG95, BG77 and BG600L. Tested and working on EC21e.

As the gsm_ppp doesn't do power control, it is required to power
on the modem manually in the application.

Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
This commit is contained in:
Yong Cong Sin 2021-09-19 18:02:18 +08:00 • committed by Anas Nashif
commit 6083b89553
3 changed files with 20 additions and 0 deletions
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1
drivers/console/Kconfig.gsm_mux
View file

@ -60,6 +60,7 @@ config GSM_MUX_PENDING_CMD_MAX
config GSM_MUX_MRU_DEFAULT_LEN
int "Default size of received user data (MRU)"
default 127 if MODEM_GSM_SIMCOM
default 127 if MODEM_GSM_QUECTEL
default 31
range 1 1509
depends on GSM_MUX

5
drivers/modem/Kconfig.gsm
View file

@ -27,6 +27,11 @@ config MODEM_GSM_SIMCOM
help
Use this if you have SIMCOM based modem like SIM800 etc.
config MODEM_GSM_QUECTEL
bool "Quectel modem"
help
Use this if you have Quectel based modem like EC2X etc.
endchoice
config MODEM_GSM_RX_STACK_SIZE

14
drivers/modem/gsm_ppp.c
View file

@ -769,6 +769,20 @@ static int mux_enable(struct gsm_modem *gsm)
STRINGIFY(CONFIG_GSM_MUX_MRU_DEFAULT_LEN),
&gsm->sem_response,
GSM_CMD_AT_TIMEOUT);
} else if (IS_ENABLED(CONFIG_MODEM_GSM_QUECTEL)) {
ret = modem_cmd_send_nolock(&gsm->context.iface,
&gsm->context.cmd_handler,
&response_cmds[0],
ARRAY_SIZE(response_cmds),
"AT+CMUX=0,0,5,"
STRINGIFY(CONFIG_GSM_MUX_MRU_DEFAULT_LEN),
&gsm->sem_response,
GSM_CMD_AT_TIMEOUT);
/* Arbitrary delay for Quectel modems to initialize the CMUX,
* without this the AT cmd will fail.
*/
k_sleep(K_SECONDS(1));
} else {
/* Generic GSM modem */
ret = modem_cmd_send_nolock(&gsm->context.iface,