Input: ALPS - add "Dolphin V1" touchpad support

These touchpads use a different protocol; they have been seen on Dell
N5110, Dell 17R SE, and others.

The official ALPS driver identifies them by looking for an exact match
on the E7 report: 73 03 50.  Dolphin V1 returns an EC report of
73 01 xx (02 and 0d have been seen); Dolphin V2 returns an EC report of
73 02 xx (02 has been seen).

Dolphin V2 probably needs a different initialization sequence and/or
report parser, so it is left for a future commit.

Signed-off-by: Dave Turvene <dturvene@dahetral.com>
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 9c97531..0238e0e 100644 (file)
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -490,6 +490,29 @@ static void alps_decode_rushmore(struct alps_fields *f, unsigned char *p)
        f->y_map |= (p[5] & 0x20) << 6;
 }
 
+static void alps_decode_dolphin(struct alps_fields *f, unsigned char *p)
+{
+       f->first_mp = !!(p[0] & 0x02);
+       f->is_mp = !!(p[0] & 0x20);
+
+       f->fingers = ((p[0] & 0x6) >> 1 |
+                    (p[0] & 0x10) >> 2);
+       f->x_map = ((p[2] & 0x60) >> 5) |
+                  ((p[4] & 0x7f) << 2) |
+                  ((p[5] & 0x7f) << 9) |
+                  ((p[3] & 0x07) << 16) |
+                  ((p[3] & 0x70) << 15) |
+                  ((p[0] & 0x01) << 22);
+       f->y_map = (p[1] & 0x7f) |
+                  ((p[2] & 0x1f) << 7);
+
+       f->x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
+       f->y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
+       f->z = (p[0] & 4) ? 0 : p[5] & 0x7f;
+
+       alps_decode_buttons_v3(f, p);
+}
+
 static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
 {
        struct alps_data *priv = psmouse->private;
@@ -874,7 +897,8 @@ static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
        }
 
        /* Bytes 2 - pktsize should have 0 in the highest bit */
-       if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
+       if (priv->proto_version != ALPS_PROTO_V5 &&
+           psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
            (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
                psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
                            psmouse->pktcnt - 1,
@@ -1003,7 +1027,8 @@ static int alps_enter_command_mode(struct psmouse *psmouse)
                return -1;
        }
 
-       if (param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) {
+       if ((param[0] != 0x88 || (param[1] != 0x07 && param[1] != 0x08)) &&
+           param[0] != 0x73) {
                psmouse_dbg(psmouse,
                            "unknown response while entering command mode\n");
                return -1;
@@ -1495,6 +1520,23 @@ error:
        return -1;
 }
 
+static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
+{
+       struct ps2dev *ps2dev = &psmouse->ps2dev;
+       unsigned char param[2];
+
+       /* This is dolphin "v1" as empirically defined by florin9doi */
+       param[0] = 0x64;
+       param[1] = 0x28;
+
+       if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
+           ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
+           ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
+               return -1;
+
+       return 0;
+}
+
 static void alps_set_defaults(struct alps_data *priv)
 {
        priv->byte0 = 0x8f;
@@ -1528,6 +1570,21 @@ static void alps_set_defaults(struct alps_data *priv)
                priv->nibble_commands = alps_v4_nibble_commands;
                priv->addr_command = PSMOUSE_CMD_DISABLE;
                break;
+       case ALPS_PROTO_V5:
+               priv->hw_init = alps_hw_init_dolphin_v1;
+               priv->process_packet = alps_process_packet_v3;
+               priv->decode_fields = alps_decode_dolphin;
+               priv->set_abs_params = alps_set_abs_params_mt;
+               priv->nibble_commands = alps_v3_nibble_commands;
+               priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
+               priv->byte0 = 0xc8;
+               priv->mask0 = 0xc8;
+               priv->flags = 0;
+               priv->x_max = 1360;
+               priv->y_max = 660;
+               priv->x_bits = 23;
+               priv->y_bits = 12;
+               break;
        }
 }
 
@@ -1588,6 +1645,12 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
 
        if (alps_match_table(psmouse, priv, e7, ec) == 0) {
                return 0;
+       } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
+                  ec[0] == 0x73 && ec[1] == 0x01) {
+               priv->proto_version = ALPS_PROTO_V5;
+               alps_set_defaults(priv);
+
+               return 0;
        } else if (ec[0] == 0x88 && ec[1] == 0x08) {
                priv->proto_version = ALPS_PROTO_V3;
                alps_set_defaults(priv);

diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index 9704805..eee5985 100644 (file)
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -16,6 +16,7 @@
 #define ALPS_PROTO_V2  2
 #define ALPS_PROTO_V3  3
 #define ALPS_PROTO_V4  4
+#define ALPS_PROTO_V5  5
 
 /**
  * struct alps_model_info - touchpad ID table