sony-laptop: add edge modem support (also called WWAN)

Some SZ Vaios have a gsm built-in modem. Allow powering on/off this device. Thanks to Joshua Wise for the base code. Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Len Brown <len.brown@intel.com>

sony-laptop: add edge modem support (also called WWAN)
Some SZ Vaios have a gsm built-in modem. Allow powering on/off this device. Thanks to Joshua Wise for the base code. Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Len Brown <len.brown@intel.com>
malattia@linux.it · Len Brown
1 parent 9f9f076171
Showing 1 changed file with 41 additions and 0 deletions Side-by-side Diff
drivers/misc/sony-laptop.c
@@ -923,6 +923,7 @@
 	int			model;
 	u8			camera_power;
 	u8			bluetooth_power;
+	u8			wwan_power;
 	struct acpi_device	*acpi_dev;
 	struct sony_pic_irq	*cur_irq;
 	struct sony_pic_ioport	*cur_ioport;
@@ -1330,6 +1331,44 @@
 	return count;
 }
  
+/* gprs/edge modem (SZ460N and SZ210P), thanks to Joshua Wise */
+static void sony_pic_set_wwanpower(u8 state)
+{
+	state = !!state;
+	mutex_lock(&spic_dev.lock);
+	if (spic_dev.wwan_power == state) {
+		mutex_unlock(&spic_dev.lock);
+		return;
+	}
+	sony_pic_call2(0xB0, state);
+	spic_dev.wwan_power = state;
+	mutex_unlock(&spic_dev.lock);
+}
+
+static ssize_t sony_pic_wwanpower_store(struct device *dev,
+		struct device_attribute *attr,
+		const char *buffer, size_t count)
+{
+	unsigned long value;
+	if (count > 31)
+		return -EINVAL;
+
+	value = simple_strtoul(buffer, NULL, 10);
+	sony_pic_set_wwanpower(value);
+
+	return count;
+}
+
+static ssize_t sony_pic_wwanpower_show(struct device *dev,
+		struct device_attribute *attr, char *buffer)
+{
+	ssize_t count;
+	mutex_lock(&spic_dev.lock);
+	count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.wwan_power);
+	mutex_unlock(&spic_dev.lock);
+	return count;
+}
+
 /* bluetooth subsystem power state */
 static void __sony_pic_set_bluetoothpower(u8 state)
 {
  
@@ -1412,11 +1451,13 @@
  
 static SPIC_ATTR(camerapower, 0644);
 static SPIC_ATTR(bluetoothpower, 0644);
+static SPIC_ATTR(wwanpower, 0644);
 static SPIC_ATTR(fanspeed, 0644);
  
 static struct attribute *spic_attributes[] = {
 	&spic_attr_camerapower.attr,
 	&spic_attr_bluetoothpower.attr,
+	&spic_attr_wwanpower.attr,
 	&spic_attr_fanspeed.attr,
 	NULL
 };
...	...	@@ -923,6 +923,7 @@
923	923	int model;
924	924	u8 camera_power;
925	925	u8 bluetooth_power;
	926	+ u8 wwan_power;
926	927	struct acpi_device *acpi_dev;
927	928	struct sony_pic_irq *cur_irq;
928	929	struct sony_pic_ioport *cur_ioport;
...	...	@@ -1330,6 +1331,44 @@
1330	1331	return count;
1331	1332	}
1332	1333
	1334	+/* gprs/edge modem (SZ460N and SZ210P), thanks to Joshua Wise */
	1335	+static void sony_pic_set_wwanpower(u8 state)
	1336	+{
	1337	+ state = !!state;
	1338	+ mutex_lock(&spic_dev.lock);
	1339	+ if (spic_dev.wwan_power == state) {
	1340	+ mutex_unlock(&spic_dev.lock);
	1341	+ return;
	1342	+ }
	1343	+ sony_pic_call2(0xB0, state);
	1344	+ spic_dev.wwan_power = state;
	1345	+ mutex_unlock(&spic_dev.lock);
	1346	+}
	1347	+
	1348	+static ssize_t sony_pic_wwanpower_store(struct device *dev,
	1349	+ struct device_attribute *attr,
	1350	+ const char *buffer, size_t count)
	1351	+{
	1352	+ unsigned long value;
	1353	+ if (count > 31)
	1354	+ return -EINVAL;
	1355	+
	1356	+ value = simple_strtoul(buffer, NULL, 10);
	1357	+ sony_pic_set_wwanpower(value);
	1358	+
	1359	+ return count;
	1360	+}
	1361	+
	1362	+static ssize_t sony_pic_wwanpower_show(struct device *dev,
	1363	+ struct device_attribute attr, char buffer)
	1364	+{
	1365	+ ssize_t count;
	1366	+ mutex_lock(&spic_dev.lock);
	1367	+ count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.wwan_power);
	1368	+ mutex_unlock(&spic_dev.lock);
	1369	+ return count;
	1370	+}
	1371	+
1333	1372	/* bluetooth subsystem power state */
1334	1373	static void __sony_pic_set_bluetoothpower(u8 state)
1335	1374	{
1336	1375
...	...	@@ -1412,11 +1451,13 @@
1412	1451
1413	1452	static SPIC_ATTR(camerapower, 0644);
1414	1453	static SPIC_ATTR(bluetoothpower, 0644);
	1454	+static SPIC_ATTR(wwanpower, 0644);
1415	1455	static SPIC_ATTR(fanspeed, 0644);
1416	1456
1417	1457	static struct attribute *spic_attributes[] = {
1418	1458	&spic_attr_camerapower.attr,
1419	1459	&spic_attr_bluetoothpower.attr,
	1460	+ &spic_attr_wwanpower.attr,
1420	1461	&spic_attr_fanspeed.attr,
1421	1462	NULL
1422	1463	};