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    Subject[ 37/72] Input: bcm5974 - add support for the 2013 MacBook Air
    Date
    3.10-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Dmitry Torokhov <rydberg@euromail.se>

    commit 148c1c8ad3c4170186ebe6ea5900adde27d2a0e7 upstream.

    The June 2013 Macbook Air (13'') has a new trackpad protocol; four new
    values are inserted in the header, and the mode switch is no longer
    needed. This patch adds support for the new devices.

    Reported-and-tested-by: Brad Ford <plymouthffl@gmail.com>
    Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
    Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/input/mouse/bcm5974.c | 36 ++++++++++++++++++++++++++++++++++--
    1 file changed, 34 insertions(+), 2 deletions(-)

    --- a/drivers/input/mouse/bcm5974.c
    +++ b/drivers/input/mouse/bcm5974.c
    @@ -88,6 +88,10 @@
    #define USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI 0x0259
    #define USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO 0x025a
    #define USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS 0x025b
    +/* MacbookAir6,2 (unibody, June 2013) */
    +#define USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI 0x0291
    +#define USB_DEVICE_ID_APPLE_WELLSPRING8_ISO 0x0292
    +#define USB_DEVICE_ID_APPLE_WELLSPRING8_JIS 0x0293

    #define BCM5974_DEVICE(prod) { \
    .match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \
    @@ -145,6 +149,10 @@ static const struct usb_device_id bcm597
    BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ANSI),
    BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_ISO),
    BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING7A_JIS),
    + /* MacbookAir6,2 */
    + BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI),
    + BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_ISO),
    + BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING8_JIS),
    /* Terminating entry */
    {}
    };
    @@ -172,15 +180,18 @@ struct bt_data {
    /* trackpad header types */
    enum tp_type {
    TYPE1, /* plain trackpad */
    - TYPE2 /* button integrated in trackpad */
    + TYPE2, /* button integrated in trackpad */
    + TYPE3 /* additional header fields since June 2013 */
    };

    /* trackpad finger data offsets, le16-aligned */
    #define FINGER_TYPE1 (13 * sizeof(__le16))
    #define FINGER_TYPE2 (15 * sizeof(__le16))
    +#define FINGER_TYPE3 (19 * sizeof(__le16))

    /* trackpad button data offsets */
    #define BUTTON_TYPE2 15
    +#define BUTTON_TYPE3 23

    /* list of device capability bits */
    #define HAS_INTEGRATED_BUTTON 1
    @@ -400,6 +411,19 @@ static const struct bcm5974_config bcm59
    { SN_COORD, -150, 6730 },
    { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
    },
    + {
    + USB_DEVICE_ID_APPLE_WELLSPRING8_ANSI,
    + USB_DEVICE_ID_APPLE_WELLSPRING8_ISO,
    + USB_DEVICE_ID_APPLE_WELLSPRING8_JIS,
    + HAS_INTEGRATED_BUTTON,
    + 0, sizeof(struct bt_data),
    + 0x83, TYPE3, FINGER_TYPE3, FINGER_TYPE3 + SIZEOF_ALL_FINGERS,
    + { SN_PRESSURE, 0, 300 },
    + { SN_WIDTH, 0, 2048 },
    + { SN_COORD, -4620, 5140 },
    + { SN_COORD, -150, 6600 },
    + { SN_ORIENT, -MAX_FINGER_ORIENTATION, MAX_FINGER_ORIENTATION }
    + },
    {}
    };

    @@ -557,6 +581,9 @@ static int report_tp_state(struct bcm597
    input_report_key(input, BTN_LEFT, ibt);
    }

    + if (c->tp_type == TYPE3)
    + input_report_key(input, BTN_LEFT, dev->tp_data[BUTTON_TYPE3]);
    +
    input_sync(input);

    return 0;
    @@ -572,9 +599,14 @@ static int report_tp_state(struct bcm597

    static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on)
    {
    - char *data = kmalloc(8, GFP_KERNEL);
    int retval = 0, size;
    + char *data;
    +
    + /* Type 3 does not require a mode switch */
    + if (dev->cfg.tp_type == TYPE3)
    + return 0;

    + data = kmalloc(8, GFP_KERNEL);
    if (!data) {
    dev_err(&dev->intf->dev, "out of memory\n");
    retval = -ENOMEM;



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