iridium: override signal quality retrieval command

plugins/mm-modem-iridium-gsm.c

@@ -27,7 +27,10 @@
 #include "mm-modem-iridium-gsm.h"
 #include "mm-log.h"
 
-G_DEFINE_TYPE (MMModemIridiumGsm, mm_modem_iridium_gsm, MM_TYPE_GENERIC_GSM);
+static void modem_gsm_network_init (MMModemGsmNetwork *gsm_network_class);
+
+G_DEFINE_TYPE_EXTENDED (MMModemIridiumGsm, mm_modem_iridium_gsm, MM_TYPE_GENERIC_GSM, 0,
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_MODEM_GSM_NETWORK, modem_gsm_network_init))
 
 MMModem *
 mm_modem_iridium_gsm_new (const char *device,
@@ -50,6 +53,81 @@ mm_modem_iridium_gsm_new (const char *device,
                                    NULL));
 }
 
+static void
+get_csqf_done (MMAtSerialPort *port,
+               GString *response,
+               GError *error,
+               gpointer user_data)
+{
+    MMCallbackInfo *info = (MMCallbackInfo *) user_data;
+    gboolean parsed = FALSE;
+
+    /* If the modem has already been removed, return without
+     * scheduling callback */
+    if (mm_callback_info_check_modem_removed (info))
+        return;
+
+    if (error) {
+        info->error = g_error_copy (error);
+        goto done;
+    }
+
+    if (response && strstr (response->str, "+CSQ:")) {
+        /* Got valid reply */
+        const char *str;
+        int quality;
+
+        str = strstr (response->str, "+CSQ:") + 5;
+
+        /* Skip possible whitespaces after '+CSQF:' and before the response */
+        while (*str == ' ')
+            str++;
+
+        if (sscanf (str, "%d", &quality)) {
+            /* Normalize the quality. <rssi> is NOT given in dBs,
+             * given as a relative value between 0 and 5 */
+            quality = CLAMP (quality, 0, 5) * 100 / 5;
+
+            mm_generic_gsm_update_signal_quality (MM_GENERIC_GSM (info->modem), quality);
+            mm_callback_info_set_result (info, GUINT_TO_POINTER (quality), NULL);
+            parsed = TRUE;
+        }
+    }
+
+    if (!parsed && !info->error) {
+        info->error = g_error_new_literal (MM_MODEM_ERROR, MM_MODEM_ERROR_GENERAL,
+                                           "Could not parse signal quality results");
+    }
+
+done:
+    mm_callback_info_schedule (info);
+}
+
+static void
+get_signal_quality (MMModemGsmNetwork *modem,
+                    MMModemUIntFn callback,
+                    gpointer user_data)
+{
+    MMCallbackInfo *info;
+    MMAtSerialPort *port;
+    MMModemGsmNetwork *parent_iface;
+
+    port = mm_generic_gsm_get_best_at_port (MM_GENERIC_GSM (modem), NULL);
+    if (!port) {
+        /* Let the superclass handle it, will return cached value */
+        parent_iface = g_type_interface_peek_parent (MM_MODEM_GSM_NETWORK_GET_INTERFACE (modem));
+        parent_iface->get_signal_quality (modem, callback, user_data);
+        return;
+    }
+
+    info = mm_callback_info_uint_new (MM_MODEM (modem), callback, user_data);
+
+    /* The iridium modem may have a huge delay to get signal quality if we pass
+     * AT+CSQ, so we'll default to use AT+CSQF, which is a fast version that
+     * returns right away the last signal quality value retrieved */
+    mm_at_serial_port_queue_command (port, "+CSQF", 3, get_csqf_done, info);
+}
+
 static void
 get_sim_iccid (MMGenericGsm *modem,
                MMModemStringFn callback,
@@ -116,6 +194,12 @@ get_property (GObject *object,
 
 /*****************************************************************************/
 
+static void
+modem_gsm_network_init (MMModemGsmNetwork *network_class)
+{
+    network_class->get_signal_quality = get_signal_quality;
+}
+
 static void
 mm_modem_iridium_gsm_init (MMModemIridiumGsm *self)
 {