Add SIMCOM support.

I developped this with the SIM5216E chipset and ofono 1.12.

 - SMS and GPRS work (in the same time) ;
 - SIM card presence check ;
 - No voice part because I can't test it ;
 - Use default characters set instead GSM because it works like that
   for what I'm doing (SMS+GPRS) (by default, the set is IRA for SIM5216E).
   Also, the SIMCOM doc affraids me about problems when using GSM
   (this setting causes easily software flow control (XON /XOFF) problems.).

Signed-off-by: Anthony Viallard <homer242 at gmail.com>
--- ofono-1.12.orig/Makefile.am 2012-04-20 21:06:29.000000000 +0200
+++ ofono-1.12/Makefile.am      2013-01-21 17:17:48.089627277 +0100
@@ -371,6 +371,9 @@ builtin_sources += plugins/samsung.c
 builtin_modules += sim900
 builtin_sources += plugins/sim900.c
 
+builtin_modules += simcom
+builtin_sources += plugins/simcom.c
+
 if BLUETOOTH
 builtin_modules += bluetooth
 builtin_sources += plugins/bluetooth.c plugins/bluetooth.h
--- ofono-1.12.orig/drivers/atmodem/sms.c       2012-04-20 21:06:29.000000000 
+0200
+++ ofono-1.12/drivers/atmodem/sms.c    2013-01-21 16:48:44.460627485 +0100
@@ -805,6 +807,7 @@ static gboolean build_cnmi_string(char *
        case OFONO_VENDOR_NOVATEL:
        case OFONO_VENDOR_HUAWEI:
        case OFONO_VENDOR_ZTE:
+       case OFONO_VENDOR_SIMCOM:
                /* MSM devices advertise support for mode 2, but return an
                 * error if we attempt to actually use it. */
                mode = "1";
diff -pruN ofono-1.12.orig/drivers/atmodem/sim.c 
ofono-1.12/drivers/atmodem/sim.c
--- ofono-1.12.orig/drivers/atmodem/sim.c       2013-01-23 11:38:22.959609087 
+0100
+++ ofono-1.12/drivers/atmodem/sim.c    2013-01-23 11:57:52.602608948 +0100
@@ -1023,12 +1023,18 @@ static void at_pin_send_cb(gboolean ok,
                                                        FALSE, cbd, g_free);
                return;
        case OFONO_VENDOR_ZTE:
        case OFONO_VENDOR_ALCATEL:
        case OFONO_VENDOR_HUAWEI:
+       case OFONO_VENDOR_SIMCOM:
                /*
                 * On ZTE modems, after pin is entered, SIM state is checked
                 * by polling CPIN as their modem doesn't provide unsolicited
                 * notification of SIM readiness.
+                *
+                * On SIMCOM modems, SIM is busy after pin is entered (we've
+                * got an "+CME ERROR: 14" at "AT+CPIN?" request) and ofono
+                * don't catch the "+CPIN: READY" message sent by the modem
+                * when SIM is ready. So, use extra CPIN to check the state.
                 */
                sd->sim_state_query = at_util_sim_state_query_new(sd->chat,
                                                2, 20, sim_state_cb, cbd,
diff -purN ofono-1.12/drivers/atmodem/network-registration.c 
ofono-patched/drivers/atmodem/network-registration.c
--- ofono-1.12/drivers/atmodem/network-registration.c   2013-01-18 
15:04:03.598659165 +0100
+++ ofono-patched/drivers/atmodem/network-registration.c        2013-01-18 
14:54:03.256659236 +0100
@@ -1411,6 +1411,14 @@ static void at_creg_set_cb(gboolean ok,
        }
 
        switch (nd->vendor) {
+       case OFONO_VENDOR_SIMCOM:
+               /* Register for CSQ changes */
+               g_at_chat_send(nd->chat, "AT+AUTOCSQ=1,1", none_prefix,
+                               NULL, NULL, NULL);
+
+               g_at_chat_register(nd->chat, "+CSQ:",
+                                  csq_notify, FALSE, netreg, NULL);
+               break;
        case OFONO_VENDOR_PHONESIM:
                g_at_chat_register(nd->chat, "+CSQ:",
                                        csq_notify, FALSE, netreg, NULL);
@@ -1534,7 +1537,6 @@ static void at_creg_set_cb(gboolean ok,
                break;
        case OFONO_VENDOR_NOKIA:
        case OFONO_VENDOR_SAMSUNG:
-       case OFONO_VENDOR_SIMCOM:
                /* Signal strength reporting via CIND is not supported */
                break;
        default:

--- /dev/null   2013-01-28 10:34:59.843091650 +0100
+++ ofono-1.12/plugins/simcom.c 2013-02-15 16:16:38.058552544 +0100
@@ -0,0 +1,401 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2008-2011  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <glib.h>
+#include <gatchat.h>
+#include <gattty.h>
+
+#define OFONO_API_SUBJECT_TO_CHANGE
+#include <ofono/plugin.h>
+#include <ofono/modem.h>
+#include <ofono/devinfo.h>
+#include <ofono/netreg.h>
+#include <ofono/sim.h>
+#include <ofono/cbs.h>
+#include <ofono/sms.h>
+#include <ofono/ussd.h>
+#include <ofono/gprs.h>
+#include <ofono/gprs-context.h>
+#include <ofono/radio-settings.h>
+#include <ofono/phonebook.h>
+#include <ofono/log.h>
+
+#include <drivers/atmodem/atutil.h>
+#include <drivers/atmodem/vendor.h>
+
+#define MAX_IGNITION_POOL_CALL    7
+
+#define CMEERR_SIMBUSY           14
+
+static const char *none_prefix[] = { NULL };
+
+struct simcom_data {
+       GAtChat *modem;
+       GAtChat *data;
+       guint ignition_pool;
+       unsigned int ignition_pool_call;
+       unsigned int at_ignition_pending;
+       ofono_bool_t have_sim;
+};
+
+/* Callback and helpers functions */
+static void simcom_debug(const char *str, void *user_data)
+{
+       const char *prefix = user_data;
+
+       ofono_info("%s%s", prefix, str);
+}
+
+static gboolean simcom_ignition(gpointer user_data)
+{
+       struct ofono_modem *modem = user_data;
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       ++data->ignition_pool_call;
+
+       if(data->at_ignition_pending > 0)
+       {
+               if(data->ignition_pool_call > MAX_IGNITION_POOL_CALL)
+               {
+                       ofono_error("Ignition timeout");
+                       return FALSE;
+               }
+
+               /* Waiting reply of AT commands */
+               DBG("Waiting AT reply...");
+               return TRUE;
+       }
+
+       ofono_modem_set_powered(modem, TRUE);
+
+       return FALSE;
+}
+
+static void simcom_sim_status(gboolean ok, GAtResult *result, gpointer 
user_data)
+{
+       struct ofono_modem *modem = user_data;
+       struct ofono_error error;
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       --data->at_ignition_pending;
+
+       if(!ok)
+       {
+               decode_at_error(&error, g_at_result_final_response(result));
+               if(error.type == OFONO_ERROR_TYPE_CME)
+               {
+                       if(error.error == CMEERR_SIMBUSY)
+                       {
+                               DBG("System is busy. Retry...");
+                               g_at_chat_send(data->data, "AT+CPIN?",
+                                              none_prefix,
+                                              simcom_sim_status, modem,
+                                              NULL);
+                               ++data->at_ignition_pending;
+                               return;
+                       }
+               }
+
+               data->have_sim = FALSE;
+               return;
+       }
+
+       /* If doesn't have an "fatal" error on AT+CPIN request,
+        * we can guess there a SIM card ...
+        */
+       data->have_sim = TRUE;
+}
+
+static void cfun_enable(gboolean ok, GAtResult *result, gpointer user_data)
+{
+       struct ofono_modem *modem = user_data;
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       DBG("");
+
+       if (!ok) {
+               g_at_chat_unref(data->modem);
+               data->modem = NULL;
+
+               g_at_chat_unref(data->data);
+               data->data = NULL;
+
+               ofono_modem_set_powered(modem, FALSE);
+               return;
+       }
+
+       /* Get model and sim card status */
+       data->at_ignition_pending = 0;
+
+       g_at_chat_send(data->data, "AT+CPIN?", none_prefix,
+                      simcom_sim_status, modem, NULL);
+       ++data->at_ignition_pending;
+
+       data->ignition_pool = g_timeout_add_seconds(1,
+                                                   simcom_ignition,
+                                                   modem);
+}
+
+static void cfun_disable(gboolean ok, GAtResult *result, gpointer user_data)
+{
+       struct ofono_modem *modem = user_data;
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       DBG("");
+
+       g_at_chat_unref(data->data);
+       data->data = NULL;
+
+       if (ok)
+               ofono_modem_set_powered(modem, FALSE);
+}
+
+static GAtChat *open_device(struct ofono_modem *modem,
+                           const char *key,
+                           char *debug)
+{
+       const char *device;
+       GIOChannel *channel;
+       GAtSyntax *syntax;
+       GAtChat *chat;
+       /* GHashTable *options; */
+
+       device = ofono_modem_get_string(modem, key);
+       if (device == NULL)
+       {
+               ofono_error("Failed to get modem '%s'", key);
+               return NULL;
+       }
+
+       DBG("%s %s", key, device);
+
+       /* options = g_hash_table_new(g_str_hash, g_str_equal); */
+       /* if (options == NULL) */
+       /*      return NULL; */
+
+       /* g_hash_table_insert(options, "Baud", "115200"); */
+       /* g_hash_table_insert(options, "Parity", "none"); */
+       /* g_hash_table_insert(options, "StopBits", "1"); */
+       /* g_hash_table_insert(options, "DataBits", "8"); */
+       /* g_hash_table_insert(options, "XonXoff", "off"); */
+       /* g_hash_table_insert(options, "RtsCts", "on"); */
+       /* g_hash_table_insert(options, "Local", "on"); */
+       /* g_hash_table_insert(options, "Read", "on"); */
+
+       channel = g_at_tty_open(device, NULL);
+
+       /* g_hash_table_destroy(options); */
+
+       if (channel == NULL)
+       {
+               ofono_error("Failed to get tty for '%s'", key);
+               return NULL;
+       }
+
+       syntax = g_at_syntax_new_gsm_permissive();
+       chat = g_at_chat_new(channel, syntax);
+       g_at_syntax_unref(syntax);
+
+       g_io_channel_unref(channel);
+
+       if (chat == NULL)
+       {
+               ofono_error("Failed to get chat for '%s'", key);
+               return NULL;
+       }
+
+       //if (getenv("OFONO_AT_DEBUG"))
+               g_at_chat_set_debug(chat, simcom_debug, debug);
+
+       return chat;
+}
+
+/* Modem interface function */
+static int simcom_probe(struct ofono_modem *modem)
+{
+       struct simcom_data *data;
+
+       DBG("%p", modem);
+
+       data = g_try_new0(struct simcom_data, 1);
+       if (data == NULL)
+               return -ENOMEM;
+
+       ofono_modem_set_data(modem, data);
+
+       return 0;
+}
+
+static void simcom_remove(struct ofono_modem *modem)
+{
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       DBG("%p", modem);
+
+       if(data->ignition_pool > 0)
+       {
+               g_source_remove(data->ignition_pool);
+               data->ignition_pool = 0;
+       }
+
+       ofono_modem_set_data(modem, NULL);
+
+       /* Cleanup after hot-unplug */
+       g_at_chat_unref(data->data);
+
+       g_free(data);
+}
+
+static int simcom_enable(struct ofono_modem *modem)
+{
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       DBG("%p", modem);
+
+       data->modem = open_device(modem, "Modem", "Modem: ");
+       if (data->modem == NULL)
+               return -EINVAL;
+
+       data->data = open_device(modem, "Data", "Data: ");
+       if (data->data == NULL) {
+               g_at_chat_unref(data->modem);
+               data->modem = NULL;
+               return -EIO;
+       }
+
+       g_at_chat_set_slave(data->modem, data->data);
+
+       g_at_chat_blacklist_terminator(data->data,
+                                       G_AT_CHAT_TERMINATOR_NO_CARRIER);
+
+       /* init modem */
+       g_at_chat_send(data->modem, "ATE0 +CMEE=1", NULL, NULL, NULL, NULL);
+       g_at_chat_send(data->data, "ATE0 +CMEE=1", NULL, NULL, NULL, NULL);
+
+       g_at_chat_send(data->data, "AT+CFUN=1", none_prefix,
+                      cfun_enable, modem, NULL);
+
+       return -EINPROGRESS;
+}
+
+static int simcom_disable(struct ofono_modem *modem)
+{
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       DBG("%p", modem);
+
+       g_at_chat_cancel_all(data->modem);
+       g_at_chat_unregister_all(data->modem);
+
+       g_at_chat_unref(data->modem);
+       data->modem = NULL;
+
+       g_at_chat_cancel_all(data->data);
+       g_at_chat_unregister_all(data->data);
+
+       g_at_chat_send(data->data, "AT+CFUN=4", none_prefix,
+                      cfun_disable, modem, NULL);
+
+       return -EINPROGRESS;
+}
+
+static void simcom_pre_sim(struct ofono_modem *modem)
+{
+       struct simcom_data *data = ofono_modem_get_data(modem);
+       struct ofono_sim *sim;
+
+       DBG("%p", modem);
+
+       ofono_devinfo_create(modem, 0, "atmodem", data->data);
+       sim = ofono_sim_create(modem, OFONO_VENDOR_SIMCOM, "atmodem",
+                               data->data);
+
+       if (sim)
+               ofono_sim_inserted_notify(sim, data->have_sim);
+}
+
+static void simcom_post_sim(struct ofono_modem *modem)
+{
+       struct simcom_data *data = ofono_modem_get_data(modem);
+       struct ofono_message_waiting *mw;
+       struct ofono_gprs *gprs;
+       struct ofono_gprs_context *gc;
+
+       DBG("%p", modem);
+
+       ofono_phonebook_create(modem, 0, "atmodem", data->data);
+
+       ofono_sms_create(modem, OFONO_VENDOR_SIMCOM, "atmodem",
+                               data->data);
+
+       /* gprs things */
+       gprs = ofono_gprs_create(modem, 0, "atmodem", data->data);
+       gc = ofono_gprs_context_create(modem, 0, "atmodem", data->modem);
+
+       if(gprs && gc)
+       {
+               ofono_gprs_add_context(gprs, gc);
+       }
+}
+
+static void simcom_post_online(struct ofono_modem *modem)
+{
+       struct simcom_data *data = ofono_modem_get_data(modem);
+
+       DBG("%p", modem);
+
+       ofono_netreg_create(modem, OFONO_VENDOR_SIMCOM, "atmodem", data->data);
+       ofono_cbs_create(modem, 0, "atmodem", data->data);
+       ofono_ussd_create(modem, 0, "atmodem", data->data);
+}
+
+static struct ofono_modem_driver simcom_driver = {
+       .name           = "simcom",
+       .probe          = simcom_probe,
+       .remove         = simcom_remove,
+       .enable         = simcom_enable,
+       .disable        = simcom_disable,
+       .pre_sim        = simcom_pre_sim,
+       .post_sim       = simcom_post_sim,
+       .post_online    = simcom_post_online,
+};
+
+static int simcom_init(void)
+{
+       return ofono_modem_driver_register(&simcom_driver);
+}
+
+static void simcom_exit(void)
+{
+       ofono_modem_driver_unregister(&simcom_driver);
+}
+
+OFONO_PLUGIN_DEFINE(simcom, "SIMCOM modem driver", VERSION,
+                   OFONO_PLUGIN_PRIORITY_DEFAULT,
+                   simcom_init, simcom_exit)
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