Input: ALPS - add support for touchpads with 4-directional button

The touchpad on Acer Aspire 5720, 5520 and some other Aspire models
(signature 0x73, 0x02, 0x50) has a button that can be rocked in 4
different directions. Make the driver to generate BTN_0..BTN_3 events
in response. The Synaptics driver by default maps BTN_0 and BTN_1 to
up and down, so there should be no visible changes with the old setup
that generated BTN_FORWARD and BTN_BACK (also mapped to up and down).

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index f36110689aae873404e878625f3b5727f6e997ca..a3f492a50850f5004fd711d1bcda595453ec222d 100644 (file)
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -28,13 +28,16 @@
 #define dbg(format, arg...) do {} while (0)
 #endif
 
-#define ALPS_DUALPOINT 0x01
-#define ALPS_WHEEL     0x02
-#define ALPS_FW_BK_1   0x04
-#define ALPS_4BTN      0x08
-#define ALPS_OLDPROTO  0x10
-#define ALPS_PASS      0x20
-#define ALPS_FW_BK_2   0x40
+
+#define ALPS_OLDPROTO          0x01    /* old style input */
+#define ALPS_DUALPOINT         0x02    /* touchpad has trackstick */
+#define ALPS_PASS              0x04    /* device has a pass-through port */
+
+#define ALPS_WHEEL             0x08    /* hardware wheel present */
+#define ALPS_FW_BK_1           0x10    /* front & back buttons present */
+#define ALPS_FW_BK_2           0x20    /* front & back buttons present */
+#define ALPS_FOUR_BUTTONS      0x40    /* 4 direction button present */
+
 
 static const struct alps_model_info alps_model_data[] = {
        { { 0x32, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
@@ -56,7 +59,7 @@ static const struct alps_model_info alps_model_data[] = {
        { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
        { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
        { { 0x62, 0x02, 0x14 }, 0xcf, 0xcf, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude E6500 */
-       { { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FW_BK_1 },               /* Dell Vostro 1400 */
+       { { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS },          /* Dell Vostro 1400 */
 };
 
 /*
@@ -83,6 +86,7 @@ static const struct alps_model_info alps_model_data[] = {
 static void alps_process_packet(struct psmouse *psmouse)
 {
        struct alps_data *priv = psmouse->private;
+       const struct alps_model_info *model = priv->i;
        unsigned char *packet = psmouse->packet;
        struct input_dev *dev = psmouse->dev;
        struct input_dev *dev2 = priv->dev2;
@@ -101,7 +105,7 @@ static void alps_process_packet(struct psmouse *psmouse)
                return;
        }
 
-       if (priv->i->flags & ALPS_OLDPROTO) {
+       if (model->flags & ALPS_OLDPROTO) {
                left = packet[2] & 0x10;
                right = packet[2] & 0x08;
                middle = 0;
@@ -117,12 +121,12 @@ static void alps_process_packet(struct psmouse *psmouse)
                z = packet[5];
        }
 
-       if (priv->i->flags & ALPS_FW_BK_1) {
+       if (model->flags & ALPS_FW_BK_1) {
                back = packet[0] & 0x10;
                forward = packet[2] & 4;
        }
 
-       if (priv->i->flags & ALPS_FW_BK_2) {
+       if (model->flags & ALPS_FW_BK_2) {
                back = packet[3] & 4;
                forward = packet[2] & 4;
                if ((middle = forward && back))
@@ -132,7 +136,7 @@ static void alps_process_packet(struct psmouse *psmouse)
        ges = packet[2] & 1;
        fin = packet[2] & 2;
 
-       if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
+       if ((model->flags & ALPS_DUALPOINT) && z == 127) {
                input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
                input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 
@@ -150,7 +154,8 @@ static void alps_process_packet(struct psmouse *psmouse)
        input_report_key(dev, BTN_MIDDLE, middle);
 
        /* Convert hardware tap to a reasonable Z value */
-       if (ges && !fin) z = 40;
+       if (ges && !fin)
+               z = 40;
 
        /*
         * A "tap and drag" operation is reported by the hardware as a transition
@@ -166,8 +171,10 @@ static void alps_process_packet(struct psmouse *psmouse)
        }
        priv->prev_fin = fin;
 
-       if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
-       if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
+       if (z > 30)
+               input_report_key(dev, BTN_TOUCH, 1);
+       if (z < 25)
+               input_report_key(dev, BTN_TOUCH, 0);
 
        if (z > 0) {
                input_report_abs(dev, ABS_X, x);
@@ -177,14 +184,21 @@ static void alps_process_packet(struct psmouse *psmouse)
        input_report_abs(dev, ABS_PRESSURE, z);
        input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 
-       if (priv->i->flags & ALPS_WHEEL)
+       if (model->flags & ALPS_WHEEL)
                input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 
-       if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
+       if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
                input_report_key(dev, BTN_FORWARD, forward);
                input_report_key(dev, BTN_BACK, back);
        }
 
+       if (model->flags & ALPS_FOUR_BUTTONS) {
+               input_report_key(dev, BTN_0, packet[2] & 4);
+               input_report_key(dev, BTN_1, packet[0] & 0x10);
+               input_report_key(dev, BTN_2, packet[3] & 4);
+               input_report_key(dev, BTN_3, packet[0] & 0x20);
+       }
+
        input_sync(dev);
 }
 
@@ -393,15 +407,12 @@ static int alps_poll(struct psmouse *psmouse)
        return 0;
 }
 
-static int alps_hw_init(struct psmouse *psmouse, int *version)
+static int alps_hw_init(struct psmouse *psmouse)
 {
        struct alps_data *priv = psmouse->private;
+       const struct alps_model_info *model = priv->i;
 
-       priv->i = alps_get_model(psmouse, version);
-       if (!priv->i)
-               return -1;
-
-       if ((priv->i->flags & ALPS_PASS) &&
+       if ((model->flags & ALPS_PASS) &&
            alps_passthrough_mode(psmouse, true)) {
                return -1;
        }
@@ -416,7 +427,7 @@ static int alps_hw_init(struct psmouse *psmouse, int *version)
                return -1;
        }
 
-       if ((priv->i->flags & ALPS_PASS) &&
+       if ((model->flags & ALPS_PASS) &&
            alps_passthrough_mode(psmouse, false)) {
                return -1;
        }
@@ -432,12 +443,15 @@ static int alps_hw_init(struct psmouse *psmouse, int *version)
 
 static int alps_reconnect(struct psmouse *psmouse)
 {
+       const struct alps_model_info *model;
+
        psmouse_reset(psmouse);
 
-       if (alps_hw_init(psmouse, NULL))
+       model = alps_get_model(psmouse, NULL);
+       if (!model)
                return -1;
 
-       return 0;
+       return alps_hw_init(psmouse);
 }
 
 static void alps_disconnect(struct psmouse *psmouse)
@@ -452,6 +466,7 @@ static void alps_disconnect(struct psmouse *psmouse)
 int alps_init(struct psmouse *psmouse)
 {
        struct alps_data *priv;
+       const struct alps_model_info *model;
        struct input_dev *dev1 = psmouse->dev, *dev2;
        int version;
 
@@ -463,33 +478,48 @@ int alps_init(struct psmouse *psmouse)
        priv->dev2 = dev2;
        psmouse->private = priv;
 
-       if (alps_hw_init(psmouse, &version))
+       model = alps_get_model(psmouse, &version);
+       if (!model)
+               goto init_fail;
+
+       priv->i = model;
+
+       if (alps_hw_init(psmouse))
                goto init_fail;
 
        dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
        dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
        dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
-       dev1->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
-               BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
+       dev1->keybit[BIT_WORD(BTN_LEFT)] |=
+               BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
 
        dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
        input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
        input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
        input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 
-       if (priv->i->flags & ALPS_WHEEL) {
+       if (model->flags & ALPS_WHEEL) {
                dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
                dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
        }
 
-       if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
+       if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
                dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
                dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
        }
 
+       if (model->flags & ALPS_FOUR_BUTTONS) {
+               dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
+               dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
+               dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
+               dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
+       } else {
+               dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
+       }
+
        snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
        dev2->phys = priv->phys;
-       dev2->name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
+       dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
        dev2->id.bustype = BUS_I8042;
        dev2->id.vendor  = 0x0002;
        dev2->id.product = PSMOUSE_ALPS;
@@ -497,9 +527,9 @@ int alps_init(struct psmouse *psmouse)
        dev2->dev.parent = &psmouse->ps2dev.serio->dev;
 
        dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
-       dev2->relbit[BIT_WORD(REL_X)] |= BIT_MASK(REL_X) | BIT_MASK(REL_Y);
-       dev2->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
-               BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
+       dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+       dev2->keybit[BIT_WORD(BTN_LEFT)] =
+               BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
 
        if (input_register_device(priv->dev2))
                goto init_fail;