mbim: Add skeleton mbim_device object

Makefile.am

@@ -607,8 +607,12 @@ builtin_cflags += @ELL_CFLAGS@
 builtin_libadd += @ELL_LIBS@
 
 if MBIMMODEM
+mbim_sources =	drivers/mbimmodem/mbim.h \
+		drivers/mbimmodem/mbim.c
+
 builtin_modules += mbimmodem
-builtin_sources +=	drivers/mbimmodem/util.h \
+builtin_sources += $(mbim_sources) \
+			drivers/mbimmodem/util.h \
 			drivers/mbimmodem/mbimmodem.h \
 			drivers/mbimmodem/mbimmodem.c
 

drivers/mbimmodem/mbim.c

@@ -0,0 +1,162 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2017  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 <unistd.h>
+
+#include <ell/ell.h>
+
+#include "mbim.h"
+
+struct mbim_device {
+	int ref_count;
+	int fd;
+	struct l_io *io;
+	mbim_device_debug_func_t debug_handler;
+	void *debug_data;
+	mbim_device_destroy_func_t debug_destroy;
+	mbim_device_disconnect_func_t disconnect_handler;
+	void *disconnect_data;
+	mbim_device_destroy_func_t disconnect_destroy;
+
+	bool close_on_unref : 1;
+};
+
+static void disconnect_handler(struct l_io *io, void *user_data)
+{
+	struct mbim_device *device = user_data;
+
+	l_util_debug(device->debug_handler, device->debug_data, "disconnect");
+
+	if (device->disconnect_handler)
+		device->disconnect_handler(device->disconnect_data);
+}
+
+static bool open_write_handler(struct l_io *io, void *user_data)
+{
+	return false;
+}
+
+static bool open_read_handler(struct l_io *io, void *user_data)
+{
+	return true;
+}
+
+struct mbim_device *mbim_device_new(int fd)
+{
+	struct mbim_device *device;
+
+	if (unlikely(fd < 0))
+		return NULL;
+
+	device = l_new(struct mbim_device, 1);
+
+	device->fd = fd;
+	device->close_on_unref = false;
+
+	device->io = l_io_new(fd);
+	l_io_set_disconnect_handler(device->io, disconnect_handler,
+								device, NULL);
+
+	l_io_set_read_handler(device->io, open_read_handler, device, NULL);
+	l_io_set_write_handler(device->io, open_write_handler, device, NULL);
+
+	return mbim_device_ref(device);
+}
+
+struct mbim_device *mbim_device_ref(struct mbim_device *device)
+{
+	if (unlikely(!device))
+		return NULL;
+
+	__sync_fetch_and_add(&device->ref_count, 1);
+
+	return device;
+}
+
+void mbim_device_unref(struct mbim_device *device)
+{
+	if (unlikely(!device))
+		return;
+
+	if (__sync_sub_and_fetch(&device->ref_count, 1))
+		return;
+
+	l_io_destroy(device->io);
+
+	if (device->close_on_unref)
+		close(device->fd);
+
+	if (device->debug_destroy)
+		device->debug_destroy(device->debug_data);
+
+	if (device->disconnect_destroy)
+		device->disconnect_destroy(device->disconnect_data);
+
+	l_free(device);
+}
+
+bool mbim_device_set_disconnect_handler(struct mbim_device *device,
+					mbim_device_disconnect_func_t function,
+					void *user_data,
+					mbim_device_destroy_func_t destroy)
+{
+	if (unlikely(!device))
+		return false;
+
+	if (device->disconnect_destroy)
+		device->disconnect_destroy(device->disconnect_data);
+
+	device->disconnect_handler = function;
+	device->disconnect_destroy = destroy;
+	device->disconnect_data = user_data;
+
+	return true;
+}
+
+bool mbim_device_set_debug(struct mbim_device *device,
+				mbim_device_debug_func_t func, void *user_data,
+				mbim_device_destroy_func_t destroy)
+{
+	if (unlikely(!device))
+		return false;
+
+	if (device->debug_destroy)
+		device->debug_destroy(device->debug_data);
+
+	device->debug_handler = func;
+	device->debug_data = user_data;
+	device->debug_destroy = destroy;
+
+	return true;
+}
+
+bool mbim_device_set_close_on_unref(struct mbim_device *device, bool do_close)
+{
+	if (unlikely(!device))
+		return false;
+
+	device->close_on_unref = do_close;
+	return true;
+}

drivers/mbimmodem/mbim.h

@@ -0,0 +1,39 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2017  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
+ *
+ */
+
+struct mbim_device;
+
+typedef void (*mbim_device_debug_func_t) (const char *str, void *user_data);
+typedef void (*mbim_device_disconnect_func_t) (void *user_data);
+typedef void (*mbim_device_destroy_func_t) (void *user_data);
+
+struct mbim_device *mbim_device_new(int fd);
+bool mbim_device_set_close_on_unref(struct mbim_device *device, bool do_close);
+struct mbim_device *mbim_device_ref(struct mbim_device *device);
+void mbim_device_unref(struct mbim_device *device);
+
+bool mbim_device_set_debug(struct mbim_device *device,
+				mbim_device_debug_func_t func, void *user_data,
+				mbim_device_destroy_func_t destroy);
+bool mbim_device_set_disconnect_handler(struct mbim_device *device,
+					mbim_device_disconnect_func_t function,
+					void *user_data,
+					mbim_device_destroy_func_t destroy);