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>
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index 5641343..141284d 100644
--- a/drivers/misc/sony-laptop.c
+++ b/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
};
