HID: sony: Add Dualshock 4 Bluetooth battery and touchpad parsing

Add Dualshock 4 battery and touchpad parsing for Bluetooth reports.

Signed-off-by: Frank Praznik <frank.praznik@oh.rr.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 88401fc59886c68faa2828d06a2faa827ca1c64f..40dfa4b4252e9c3c3beb53962c881e95d202c288 100644 (file)
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -861,25 +861,34 @@ static void dualshock4_parse_report(struct sony_sc *sc, __u8 *rd, int size)
                                                struct hid_input, list);
        struct input_dev *input_dev = hidinput->input;
        unsigned long flags;
-       int n, offset = 35;
+       int n, offset;
        __u8 cable_state, battery_capacity, battery_charging;
 
+       /* Battery and touchpad data starts at byte 30 in the USB report and
+        * 32 in Bluetooth report.
+        */
+       offset = (sc->quirks & DUALSHOCK4_CONTROLLER_USB) ? 30 : 32;
+
        /* The lower 4 bits of byte 30 contain the battery level
         * and the 5th bit contains the USB cable state.
         */
-       cable_state = (rd[30] >> 4) & 0x01;
-       battery_capacity = rd[30] & 0x0F;
+       cable_state = (rd[offset] >> 4) & 0x01;
+       battery_capacity = rd[offset] & 0x0F;
 
-       /* On USB the Dualshock 4 battery level goes from 0 to 11.
-        * A battery level of 11 means fully charged.
+       /* When a USB power source is connected the battery level ranges from
+        * 0 to 10, and when running on battery power it ranges from 0 to 9.
+        * A battery level above 10 when plugged in means charge completed.
         */
-       if (cable_state && battery_capacity == 11)
+       if (!cable_state || battery_capacity > 10)
                battery_charging = 0;
        else
                battery_charging = 1;
 
+       if (!cable_state)
+               battery_capacity++;
        if (battery_capacity > 10)
-               battery_capacity--;
+               battery_capacity = 10;
+
        battery_capacity *= 10;
 
        spin_lock_irqsave(&sc->lock, flags);
@@ -888,7 +897,10 @@ static void dualshock4_parse_report(struct sony_sc *sc, __u8 *rd, int size)
        sc->battery_charging = battery_charging;
        spin_unlock_irqrestore(&sc->lock, flags);
 
-       /* The Dualshock 4 multi-touch trackpad data starts at offset 35 on USB.
+       offset += 5;
+
+       /* The Dualshock 4 multi-touch trackpad data starts at offset 35 on USB
+        * and 37 on Bluetooth.
         * The first 7 bits of the first byte is a counter and bit 8 is a touch
         * indicator that is 0 when pressed and 1 when not pressed.
         * The next 3 bytes are two 12 bit touch coordinates, X and Y.