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modem_cellular: Add support for the simcom a76xx modem 

Add support for the simcom a76xx modem which is similar to the simcom 7080
but has a few key differences. Tested with a simcom A7672SA module but as
there is a single simcom A76XX AT commands manual, the driver should work
with other modems of the series.

Signed-off-by: Olivier Lalonde <o@syskall.com>
pull/90752/head
Olivier Lalonde 2 months ago committed by Benjamin Cabé
parent
50964e4ef9
commit
afc481ab31
8 changed files with 128 additions and 6 deletions
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  1. 2
      drivers/modem/Kconfig.cellular
  2. 88
      drivers/modem/modem_cellular.c
  3. 13
      dts/bindings/modem/simcom,a76xx.yaml
  4. 12
      samples/net/cellular_modem/Kconfig
  5. 13
      samples/net/cellular_modem/README.rst
  6. 1
      samples/net/cellular_modem/prj.conf
  7. 2
      samples/net/cellular_modem/src/main.c
  8. 3
      subsys/modem/Kconfig

2
drivers/modem/Kconfig.cellular
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@ -14,7 +14,7 @@ config MODEM_CELLULAR @@ -14,7 +14,7 @@ config MODEM_CELLULAR
select NET_L2_PPP_OPTION_MRU
select NET_L2_PPP_PAP
select NET_L2_PPP_MGMT
depends on (DT_HAS_QUECTEL_BG95_ENABLED || \
depends on (DT_HAS_QUECTEL_BG95_ENABLED || DT_HAS_SIMCOM_A76XX_ENABLED || \
DT_HAS_SIMCOM_SIM7080_ENABLED || DT_HAS_U_BLOX_SARA_R4_ENABLED || \
DT_HAS_U_BLOX_SARA_R5_ENABLED || DT_HAS_SWIR_HL7800_ENABLED || \
DT_HAS_TELIT_ME910G1_ENABLED || DT_HAS_TELIT_ME310G1_ENABLED || \

88
drivers/modem/modem_cellular.c
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@ -525,8 +525,10 @@ MODEM_CHAT_MATCHES_DEFINE(dial_abort_matches, @@ -525,8 +525,10 @@ MODEM_CHAT_MATCHES_DEFINE(dial_abort_matches,
MODEM_CHAT_MATCH("NO CARRIER", "", NULL),
MODEM_CHAT_MATCH("NO DIALTONE", "", NULL));
#if DT_HAS_COMPAT_STATUS_OKAY(swir_hl7800) || DT_HAS_COMPAT_STATUS_OKAY(sqn_gm02s) || \
DT_HAS_COMPAT_STATUS_OKAY(quectel_eg800q)
#if DT_HAS_COMPAT_STATUS_OKAY(swir_hl7800) || \
DT_HAS_COMPAT_STATUS_OKAY(sqn_gm02s) || \
DT_HAS_COMPAT_STATUS_OKAY(quectel_eg800q) || \
DT_HAS_COMPAT_STATUS_OKAY(simcom_a76xx)
MODEM_CHAT_MATCH_DEFINE(connect_match, "CONNECT", "", NULL);
#endif
@ -2116,6 +2118,64 @@ MODEM_CHAT_SCRIPT_DEFINE(simcom_sim7080_periodic_chat_script, @@ -2116,6 +2118,64 @@ MODEM_CHAT_SCRIPT_DEFINE(simcom_sim7080_periodic_chat_script,
modem_cellular_chat_callback_handler, 4);
#endif
#if DT_HAS_COMPAT_STATUS_OKAY(simcom_a76xx)
MODEM_CHAT_SCRIPT_CMDS_DEFINE(simcom_a76xx_init_chat_script_cmds,
MODEM_CHAT_SCRIPT_CMD_RESP_NONE("AT", 100),
MODEM_CHAT_SCRIPT_CMD_RESP_NONE("AT", 100),
MODEM_CHAT_SCRIPT_CMD_RESP_NONE("AT", 100),
MODEM_CHAT_SCRIPT_CMD_RESP_NONE("AT", 100),
MODEM_CHAT_SCRIPT_CMD_RESP("ATE0", ok_match),
/* Power on the GNSS module.
* We need to do this early, otherwise it does not work when
* doing it later (e.g. from a user pipe).
*/
MODEM_CHAT_SCRIPT_CMD_RESP_MULT("AT+CGNSSPWR=1", allow_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CFUN=4", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CMEE=1", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CREG=1", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGREG=1", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CEREG=1", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CREG?", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CEREG?", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGREG?", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGSN", imei_match),
MODEM_CHAT_SCRIPT_CMD_RESP("", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGMM", cgmm_match),
MODEM_CHAT_SCRIPT_CMD_RESP("", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP_NONE("AT+CMUX=0,0,5,127", 300));
MODEM_CHAT_SCRIPT_DEFINE(simcom_a76xx_init_chat_script, simcom_a76xx_init_chat_script_cmds,
abort_matches, modem_cellular_chat_callback_handler, 10);
MODEM_CHAT_SCRIPT_CMDS_DEFINE(simcom_a76xx_dial_chat_script_cmds,
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGDCONT=1,\"IP\","
"\""CONFIG_MODEM_CELLULAR_APN"\"",
ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP_MULT("AT+CGACT=0,1", allow_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CFUN=1", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("ATD*99***1#", connect_match),);
MODEM_CHAT_SCRIPT_DEFINE(simcom_a76xx_dial_chat_script, simcom_a76xx_dial_chat_script_cmds,
dial_abort_matches, modem_cellular_chat_callback_handler, 10);
MODEM_CHAT_SCRIPT_CMDS_DEFINE(simcom_a76xx_periodic_chat_script_cmds,
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CREG?", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CEREG?", ok_match),
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CGREG?", ok_match));
MODEM_CHAT_SCRIPT_DEFINE(simcom_a76xx_periodic_chat_script,
simcom_a76xx_periodic_chat_script_cmds, abort_matches,
modem_cellular_chat_callback_handler, 4);
MODEM_CHAT_SCRIPT_CMDS_DEFINE(simcom_a76xx_shutdown_chat_script_cmds,
MODEM_CHAT_SCRIPT_CMD_RESP("AT+CPOF", ok_match));
MODEM_CHAT_SCRIPT_DEFINE(simcom_a76xx_shutdown_chat_script,
simcom_a76xx_shutdown_chat_script_cmds, abort_matches,
modem_cellular_chat_callback_handler, 15);
#endif
#if DT_HAS_COMPAT_STATUS_OKAY(u_blox_sara_r4)
MODEM_CHAT_SCRIPT_CMDS_DEFINE(u_blox_sara_r4_init_chat_script_cmds,
MODEM_CHAT_SCRIPT_CMD_RESP_NONE("AT", 100),
@ -2638,6 +2698,26 @@ MODEM_CHAT_SCRIPT_DEFINE(sqn_gm02s_periodic_chat_script, @@ -2638,6 +2698,26 @@ MODEM_CHAT_SCRIPT_DEFINE(sqn_gm02s_periodic_chat_script,
&simcom_sim7080_dial_chat_script, \
&simcom_sim7080_periodic_chat_script, NULL)
#define MODEM_CELLULAR_DEVICE_SIMCOM_A76XX(inst) \
MODEM_PPP_DEFINE(MODEM_CELLULAR_INST_NAME(ppp, inst), NULL, 98, 1500, 64); \
\
static struct modem_cellular_data MODEM_CELLULAR_INST_NAME(data, inst) = { \
.chat_delimiter = "\r", \
.chat_filter = "\n", \
.ppp = &MODEM_CELLULAR_INST_NAME(ppp, inst), \
}; \
\
MODEM_CELLULAR_DEFINE_AND_INIT_USER_PIPES(inst, \
(user_pipe_0, 3), \
(user_pipe_1, 4)) \
\
MODEM_CELLULAR_DEFINE_INSTANCE(inst, 500, 100, 20000, 5000, false, \
NULL, \
&simcom_a76xx_init_chat_script, \
&simcom_a76xx_dial_chat_script, \
&simcom_a76xx_periodic_chat_script, \
&simcom_a76xx_shutdown_chat_script)
#define MODEM_CELLULAR_DEVICE_U_BLOX_SARA_R4(inst) \
MODEM_PPP_DEFINE(MODEM_CELLULAR_INST_NAME(ppp, inst), NULL, 98, 1500, 64); \
\
@ -2805,6 +2885,10 @@ DT_INST_FOREACH_STATUS_OKAY(MODEM_CELLULAR_DEVICE_QUECTEL_EG800Q) @@ -2805,6 +2885,10 @@ DT_INST_FOREACH_STATUS_OKAY(MODEM_CELLULAR_DEVICE_QUECTEL_EG800Q)
DT_INST_FOREACH_STATUS_OKAY(MODEM_CELLULAR_DEVICE_SIMCOM_SIM7080)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT simcom_a76xx
DT_INST_FOREACH_STATUS_OKAY(MODEM_CELLULAR_DEVICE_SIMCOM_A76XX)
#undef DT_DRV_COMPAT
#define DT_DRV_COMPAT u_blox_sara_r4
DT_INST_FOREACH_STATUS_OKAY(MODEM_CELLULAR_DEVICE_U_BLOX_SARA_R4)
#undef DT_DRV_COMPAT

13
dts/bindings/modem/simcom,a76xx.yaml
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@ -0,0 +1,13 @@ @@ -0,0 +1,13 @@
# Copyright (C) 2025 Olivier Lalonde
# SPDX-License-Identifier: Apache-2.0
description: Simcom A76XX modem
compatible: "simcom,a76xx"
include: uart-device.yaml
properties:
mdm-power-gpios:
type: phandle-array
required: true

12
samples/net/cellular_modem/Kconfig
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@ -0,0 +1,12 @@ @@ -0,0 +1,12 @@
# Copyright (c) 2025 Olivier Lalonde
# SPDX-License-Identifier: Apache-2.0
# Configuration options for cellular modem sample
mainmenu "Cellular modem sample application"
config SAMPLE_CELLULAR_MODEM_ENDPOINT_HOSTNAME
string "Endpoint hostname"
default "test-endpoint.com"
source "Kconfig.zephyr"

13
samples/net/cellular_modem/README.rst
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@ -55,3 +55,16 @@ Next, the UART API must be specified using ``CONFIG_UART_INTERRUPT_DRIVEN=y`` or @@ -55,3 +55,16 @@ Next, the UART API must be specified using ``CONFIG_UART_INTERRUPT_DRIVEN=y`` or
``CONFIG_UART_ASYNC_API=y``. The driver doesn't support UART polling.
Lastly, the APN must be configured using ``CONFIG_MODEM_CELLULAR_APN=""``.
Server setup
************
Deploy the server on a publicly accessible host, then set the
:kconfig:option:`CONFIG_SAMPLE_CELLULAR_MODEM_ENDPOINT_HOSTNAME` variable in ``prj.conf`` to the
server's hostname.
.. code-block:: shell
git clone --depth=1 https://github.com/zephyrproject-rtos/zephyr.git
cd zephyr/samples/net/cellular_modem/server
python te.py

1
samples/net/cellular_modem/prj.conf
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@ -1,6 +1,5 @@ @@ -1,6 +1,5 @@
# Copyright (c) 2023 Bjarki Arge Andreasen
# SPDX-License-Identifier: Apache-2.0
CONFIG_POSIX_API=y
# Networking

2
samples/net/cellular_modem/src/main.c
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@ -15,7 +15,7 @@ @@ -15,7 +15,7 @@
#include <zephyr/drivers/cellular.h>
#define SAMPLE_TEST_ENDPOINT_HOSTNAME ("test-endpoint.com")
#define SAMPLE_TEST_ENDPOINT_HOSTNAME CONFIG_SAMPLE_CELLULAR_MODEM_ENDPOINT_HOSTNAME
#define SAMPLE_TEST_ENDPOINT_UDP_ECHO_PORT (7780)
#define SAMPLE_TEST_ENDPOINT_UDP_RECEIVE_PORT (7781)
#define SAMPLE_TEST_PACKET_SIZE (1024)

3
subsys/modem/Kconfig
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@ -35,7 +35,8 @@ config MODEM_CMUX_DEFAULT_MTU_127 @@ -35,7 +35,8 @@ config MODEM_CMUX_DEFAULT_MTU_127
DT_HAS_SIMCOM_SIM7080_ENABLED || DT_HAS_U_BLOX_SARA_R4_ENABLED || \
DT_HAS_U_BLOX_SARA_R5_ENABLED || DT_HAS_SWIR_HL7800_ENABLED || \
DT_HAS_TELIT_ME910G1_ENABLED || DT_HAS_TELIT_ME310G1_ENABLED || \
DT_HAS_SQN_GM02S_ENABLED || DT_HAS_QUECTEL_EG800Q_ENABLED)
DT_HAS_SQN_GM02S_ENABLED || DT_HAS_QUECTEL_EG800Q_ENABLED || \
DT_HAS_SIMCOM_A76XX_ENABLED)
help
Use the default MTU size of 127 bytes for the CMUX module on certain modems.
This must match the AT+CMUX commands in the modem_cellular driver.

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