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modem: hl7800: add API to set bands

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Add API to set LTE bands at runtime.

Signed-off-by: Ryan Erickson <ryan.erickson@lairdconnect.com>
This commit is contained in:
Ryan Erickson 2022-03-29 21:21:20 -05:00 • committed by Carles Cufí
commit 69ffc1f228
3 changed files with 82 additions and 8 deletions
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2
drivers/modem/Kconfig.hl7800
View file

@ -71,7 +71,7 @@ menuconfig MODEM_HL7800_CONFIGURE_BANDS
default "y"
help
Choose this setting to configure which LTE bands the
HL7800 modem should use.
HL7800 modem should use at boot time.
if MODEM_HL7800_CONFIGURE_BANDS

78
drivers/modem/hl7800.c
View file

@ -283,6 +283,9 @@ static const struct mdm_control_pinconfig pinconfig[] = {
#define MDM_TOP_BAND_START_POSITION 2
#define MDM_MIDDLE_BAND_START_POSITION 6
#define MDM_BOTTOM_BAND_START_POSITION 14
#define MDM_BAND_BITMAP_STR_LENGTH_MAX \
(MDM_TOP_BAND_SIZE + MDM_MIDDLE_BAND_SIZE + MDM_BOTTOM_BAND_SIZE)
#define MDM_BAND_BITMAP_STR_LENGTH_MIN 1
#define MDM_DEFAULT_AT_CMD_RETRIES 3
#define MDM_WAKEUP_TIME K_SECONDS(12)
@ -660,6 +663,7 @@ static struct stale_socket *dequeue_stale_socket(void)
static bool convert_time_string_to_struct(struct tm *tm, int32_t *offset,
char *time_string);
static int modem_reset_and_configure(void);
static int read_pin(int default_state, const struct device *port, gpio_pin_t pin)
{
@ -4999,6 +5003,68 @@ static int setup_gprs_connection(char *access_point_name)
return send_at_cmd(NULL, cmd_string, MDM_CMD_SEND_TIMEOUT, 0, false);
}
static int set_bands(const char *bands, bool full_reboot)
{
int ret;
char cmd[sizeof("AT+KBNDCFG=#,####################")];
snprintk(cmd, sizeof(cmd), "AT+KBNDCFG=%d,%s", ictx.mdm_rat, bands);
ret = send_at_cmd(NULL, cmd, MDM_CMD_SEND_TIMEOUT, MDM_DEFAULT_AT_CMD_RETRIES, false);
if (ret < 0) {
return ret;
}
if (!full_reboot) {
ret = send_at_cmd(NULL, "AT+CFUN=1,1", MDM_CMD_SEND_TIMEOUT,
MDM_DEFAULT_AT_CMD_RETRIES, false);
if (ret < 0) {
return ret;
}
ret = modem_boot_handler("LTE bands were just set");
} else {
ret = modem_reset_and_configure();
}
return ret;
}
int32_t mdm_hl7800_set_bands(const char *bands)
{
int ret, i;
char temp_bands[MDM_BAND_BITMAP_STR_LENGTH_MAX + 1];
int num_leading_zeros;
if ((bands == NULL) || (strlen(bands) > MDM_BAND_BITMAP_STR_LENGTH_MAX) ||
(strlen(bands) < MDM_BAND_BITMAP_STR_LENGTH_MIN)) {
return -EINVAL;
}
if (strlen(bands) < MDM_BAND_BITMAP_STR_LENGTH_MAX) {
num_leading_zeros = MDM_BAND_BITMAP_STR_LENGTH_MAX - strlen(bands);
for (i = 0; i < num_leading_zeros; i++) {
temp_bands[i] = '0';
if (i == (num_leading_zeros - 1)) {
strncpy(temp_bands + (i + 1), bands, sizeof(temp_bands) - (i + 1));
}
}
} else {
memcpy(temp_bands, bands, sizeof(temp_bands));
}
/* no need to set bands if settings match */
if (strncmp(temp_bands, ictx.mdm_bands_string, sizeof(temp_bands)) == 0) {
return 0;
}
hl7800_lock();
ret = set_bands(temp_bands, true);
hl7800_unlock();
return ret;
}
static int modem_reset_and_configure(void)
{
int ret = 0;
@ -5010,7 +5076,7 @@ static int modem_reset_and_configure(void)
#if CONFIG_MODEM_HL7800_CONFIGURE_BANDS
uint16_t bands_top = 0;
uint32_t bands_middle = 0, bands_bottom = 0;
char new_bands[sizeof("AT+KBNDCFG=#,####################")];
char new_bands[MDM_BAND_BITMAP_STR_LENGTH_MAX + 1];
#endif
#if CONFIG_MODEM_HL7800_PSM
const char TURN_ON_PSM[] =
@ -5183,13 +5249,11 @@ reboot:
}
snprintk(new_bands, sizeof(new_bands),
"AT+KBNDCFG=%d,%04x%08x%08x", ictx.mdm_rat, bands_top,
bands_middle, bands_bottom);
SEND_AT_CMD_EXPECT_OK(new_bands);
"%0" STRINGIFY(MDM_TOP_BAND_SIZE) "x%0" STRINGIFY(
MDM_MIDDLE_BAND_SIZE) "x%0" STRINGIFY(MDM_BOTTOM_BAND_SIZE) "x",
bands_top, bands_middle, bands_bottom);
SEND_AT_CMD_EXPECT_OK("AT+CFUN=1,1");
modem_boot_handler("LTE bands were just set");
ret = set_bands(new_bands, false);
if (ret < 0) {
goto error;
}