Input: synaptics - document 0x0c query

Since Synaptics technical writers department is a bit slow releasing updated
Synaptics interface guide, let's add some new bits (with their blessing)
to the code so that they don't get lost.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h
index 25e5d04..7453938 100644 (file)
--- a/drivers/input/mouse/synaptics.h
+++ b/drivers/input/mouse/synaptics.h
@@ -51,6 +51,29 @@
 #define SYN_EXT_CAP_REQUESTS(c)                (((c) & 0x700000) >> 20)
 #define SYN_CAP_MULTI_BUTTON_NO(ec)    (((ec) & 0x00f000) >> 12)
 #define SYN_CAP_PRODUCT_ID(ec)         (((ec) & 0xff0000) >> 16)
+
+/*
+ * The following describes response for the 0x0c query.
+ *
+ * byte        mask    name                    meaning
+ * ----        ----    -------                 ------------
+ * 1   0x01    adjustable threshold    capacitive button sensitivity
+ *                                     can be adjusted
+ * 1   0x02    report max              query 0x0d gives max coord reported
+ * 1   0x04    clearpad                sensor is ClearPad product
+ * 1   0x08    advanced gesture        not particularly meaningful
+ * 1   0x10    clickpad bit 0          1-button ClickPad
+ * 1   0x60    multifinger mode        identifies firmware finger counting
+ *                                     (not reporting!) algorithm.
+ *                                     Not particularly meaningful
+ * 1   0x80    covered pad             W clipped to 14, 15 == pad mostly covered
+ * 2   0x01    clickpad bit 1          2-button ClickPad
+ * 2   0x02    deluxe LED controls     touchpad support LED commands
+ *                                     ala multimedia control bar
+ * 2   0x04    reduced filtering       firmware does less filtering on
+ *                                     position data, driver should watch
+ *                                     for noise.
+ */
 #define SYN_CAP_CLICKPAD(ex0c)         ((ex0c) & 0x100000) /* 1-button ClickPad */
 #define SYN_CAP_CLICKPAD2BTN(ex0c)     ((ex0c) & 0x000100) /* 2-button ClickPad */
 #define SYN_CAP_MAX_DIMENSIONS(ex0c)   ((ex0c) & 0x020000)