asus-wmi: allow debugfs interface to call arbitrary method

Also add some # format flags to debugfs output.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 45 insertions, 2 deletions

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 88596ea0f74e..9095c28340cd 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -112,11 +112,14 @@ struct bios_args {
  * <platform>/    - debugfs root directory
  *   dev_id      - current dev_id
  *   ctrl_param  - current ctrl_param
+ *   method_id   - current method_id
  *   devs        - call DEVS(dev_id, ctrl_param) and print result
  *   dsts        - call DSTS(dev_id)  and print result
+ *   call        - call method_id(dev_id, ctrl_param) and print result
  */
 struct asus_wmi_debug {
         struct dentry *root;
+        u32 method_id;
         u32 dev_id;
         u32 ctrl_param;
 };
@@ -1138,7 +1141,7 @@ static int show_dsts(struct seq_file *m, void *data)
         if (err < 0)
                 return err;
 
-        seq_printf(m, "DSTS(%x) = %x\n", asus->debug.dev_id, retval);
+        seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
 
         return 0;
 }
@@ -1155,15 +1158,50 @@ static int show_devs(struct seq_file *m, void *data)
         if (err < 0)
                 return err;
 
-        seq_printf(m, "DEVS(%x, %x) = %x\n", asus->debug.dev_id,
+        seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
                    asus->debug.ctrl_param, retval);
 
         return 0;
 }
 
+static int show_call(struct seq_file *m, void *data)
+{
+        struct asus_wmi *asus = m->private;
+        struct bios_args args = {
+                .arg0 = asus->debug.dev_id,
+                .arg1 = asus->debug.ctrl_param,
+        };
+        struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
+        struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+        union acpi_object *obj;
+        acpi_status status;
+
+        status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
+                                     1, asus->debug.method_id,
+                                     &input, &output);
+
+        if (ACPI_FAILURE(status))
+                return -EIO;
+
+        obj = (union acpi_object *)output.pointer;
+        if (obj && obj->type == ACPI_TYPE_INTEGER)
+                seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
+                           asus->debug.dev_id, asus->debug.ctrl_param,
+                           (u32) obj->integer.value);
+        else
+                seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
+                           asus->debug.dev_id, asus->debug.ctrl_param,
+                           obj->type);
+
+        kfree(obj);
+
+        return 0;
+}
+
 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
         {NULL, "devs", show_devs},
         {NULL, "dsts", show_dsts},
+        {NULL, "call", show_call},
 };
 
 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
@@ -1197,6 +1235,11 @@ static int asus_wmi_debugfs_init(struct asus_wmi *asus)
                 goto error_debugfs;
         }
 
+        dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
+                                  asus->debug.root, &asus->debug.method_id);
+        if (!dent)
+                goto error_debugfs;
+
         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
                                   asus->debug.root, &asus->debug.dev_id);
         if (!dent)