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path: root/drivers/acpi/ibm_acpi.c
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Diffstat (limited to 'drivers/acpi/ibm_acpi.c')
-rw-r--r--drivers/acpi/ibm_acpi.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index 262b1f41335..15fc12482ba 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -567,6 +567,69 @@ static int bluetooth_write(char *buf)
return 0;
}
+static int wan_supported;
+
+static int wan_init(void)
+{
+ wan_supported = hkey_handle &&
+ acpi_evalf(hkey_handle, NULL, "GWAN", "qv");
+
+ return 0;
+}
+
+static int wan_status(void)
+{
+ int status;
+
+ if (!wan_supported ||
+ !acpi_evalf(hkey_handle, &status, "GWAN", "d"))
+ status = 0;
+
+ return status;
+}
+
+static int wan_read(char *p)
+{
+ int len = 0;
+ int status = wan_status();
+
+ if (!wan_supported)
+ len += sprintf(p + len, "status:\t\tnot supported\n");
+ else if (!(status & 1))
+ len += sprintf(p + len, "status:\t\tnot installed\n");
+ else {
+ len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
+ len += sprintf(p + len, "commands:\tenable, disable\n");
+ }
+
+ return len;
+}
+
+static int wan_write(char *buf)
+{
+ int status = wan_status();
+ char *cmd;
+ int do_cmd = 0;
+
+ if (!wan_supported)
+ return -ENODEV;
+
+ while ((cmd = next_cmd(&buf))) {
+ if (strlencmp(cmd, "enable") == 0) {
+ status |= 2;
+ } else if (strlencmp(cmd, "disable") == 0) {
+ status &= ~2;
+ } else
+ return -EINVAL;
+ do_cmd = 1;
+ }
+
+ if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
+ return -EIO;
+
+ return 0;
+}
+
static int video_supported;
static int video_orig_autosw;
@@ -1563,6 +1626,13 @@ static struct ibm_struct ibms[] = {
.write = bluetooth_write,
},
{
+ .name = "wan",
+ .init = wan_init,
+ .read = wan_read,
+ .write = wan_write,
+ .experimental = 1,
+ },
+ {
.name = "video",
.init = video_init,
.read = video_read,