Input: ALPS - consolidate setting protocol parameters

Move setting of all protocol properties into alps_set_protocol (former
alps_set_defaults) instead of having it split between several functions.

Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 67 insertions, 64 deletions

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 6ad2cd733a4d..b97832b622cb 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -130,6 +130,22 @@ static const struct alps_model_info alps_model_data[] = {
         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
 };
 
+static const struct alps_protocol_info alps_v3_protocol_data = {
+        ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
+};
+
+static const struct alps_protocol_info alps_v3_rushmore_data = {
+        ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
+};
+
+static const struct alps_protocol_info alps_v5_protocol_data = {
+        ALPS_PROTO_V5, 0xc8, 0xd8, 0
+};
+
+static const struct alps_protocol_info alps_v7_protocol_data = {
+        ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
+};
+
 static void alps_set_abs_params_st(struct alps_data *priv,
                                    struct input_dev *dev1);
 static void alps_set_abs_params_mt(struct alps_data *priv,
@@ -2162,11 +2178,18 @@ error:
         return ret;
 }
 
-static void alps_set_defaults(struct alps_data *priv)
+static int alps_set_protocol(struct psmouse *psmouse,
+                             struct alps_data *priv,
+                             const struct alps_protocol_info *protocol)
 {
-        priv->byte0 = 0x8f;
-        priv->mask0 = 0x8f;
-        priv->flags = ALPS_DUALPOINT;
+        psmouse->private = priv;
+
+        setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
+
+        priv->proto_version = protocol->version;
+        priv->byte0 = protocol->byte0;
+        priv->mask0 = protocol->mask0;
+        priv->flags = protocol->flags;
 
         priv->x_max = 2000;
         priv->y_max = 1400;
@@ -2201,6 +2224,11 @@ static void alps_set_defaults(struct alps_data *priv)
                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
                 priv->x_bits = 16;
                 priv->y_bits = 12;
+
+                if (alps_probe_trackstick_v3(psmouse,
+                                             ALPS_REG_BASE_RUSHMORE) < 0)
+                        priv->flags &= ~ALPS_DUALPOINT;
+
                 break;
 
         case ALPS_PROTO_V4:
@@ -2210,6 +2238,7 @@ 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_touchpad_packet_v3_v5;
@@ -2217,14 +2246,12 @@ static void alps_set_defaults(struct alps_data *priv)
                 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 = 0xd8;
-                priv->flags = 0;
                 priv->x_max = 1360;
                 priv->y_max = 660;
                 priv->x_bits = 23;
                 priv->y_bits = 12;
                 break;
+
         case ALPS_PROTO_V6:
                 priv->hw_init = alps_hw_init_v6;
                 priv->process_packet = alps_process_packet_v6;
@@ -2233,6 +2260,7 @@ static void alps_set_defaults(struct alps_data *priv)
                 priv->x_max = 2047;
                 priv->y_max = 1535;
                 break;
+
         case ALPS_PROTO_V7:
                 priv->hw_init = alps_hw_init_v7;
                 priv->process_packet = alps_process_packet_v7;
@@ -2240,19 +2268,21 @@ static void alps_set_defaults(struct alps_data *priv)
                 priv->set_abs_params = alps_set_abs_params_mt;
                 priv->nibble_commands = alps_v3_nibble_commands;
                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
-                priv->x_max = 0xfff;
-                priv->y_max = 0x7ff;
-                priv->byte0 = 0x48;
-                priv->mask0 = 0x48;
+
+                if (alps_dolphin_get_device_area(psmouse, priv))
+                        return -EIO;
 
                 if (priv->fw_ver[1] != 0xba)
                         priv->flags |= ALPS_BUTTONPAD;
+
                 break;
         }
+
+        return 0;
 }
 
-static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
-                            unsigned char *e7, unsigned char *ec)
+static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
+                                                         unsigned char *ec)
 {
         const struct alps_model_info *model;
         int i;
@@ -2264,22 +2294,16 @@ static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
                     (!model->command_mode_resp ||
                      model->command_mode_resp == ec[2])) {
 
-                        priv->proto_version = model->protocol_info.version;
-                        alps_set_defaults(priv);
-
-                        priv->flags = model->protocol_info.flags;
-                        priv->byte0 = model->protocol_info.byte0;
-                        priv->mask0 = model->protocol_info.mask0;
-
-                        return 0;
+                        return &model->protocol_info;
                 }
         }
 
-        return -EINVAL;
+        return NULL;
 }
 
 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
 {
+        const struct alps_protocol_info *protocol;
         unsigned char e6[4], e7[4], ec[4];
 
         /*
@@ -2306,48 +2330,30 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
             alps_exit_command_mode(psmouse))
                 return -EIO;
 
-        /* Save the Firmware version */
-        memcpy(priv->fw_ver, ec, 3);
-
-        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 || ec[1] == 0x02)) {
-                priv->proto_version = ALPS_PROTO_V5;
-                alps_set_defaults(priv);
-                if (alps_dolphin_get_device_area(psmouse, priv))
-                        return -EIO;
-                else
-                        return 0;
-        } else if (ec[0] == 0x88 &&
-                   ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
-                priv->proto_version = ALPS_PROTO_V7;
-                alps_set_defaults(priv);
-
-                return 0;
-        } else if (ec[0] == 0x88 && ec[1] == 0x08) {
-                priv->proto_version = ALPS_PROTO_V3_RUSHMORE;
-                alps_set_defaults(priv);
-
-                /* hack to make addr_command, nibble_command available */
-                psmouse->private = priv;
-
-                if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
-                        priv->flags &= ~ALPS_DUALPOINT;
-
-                return 0;
-        } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
-                   ec[2] >= 0x90 && ec[2] <= 0x9d) {
-                priv->proto_version = ALPS_PROTO_V3;
-                alps_set_defaults(priv);
-
-                return 0;
+        protocol = alps_match_table(e7, ec);
+        if (!protocol) {
+                if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
+                           ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
+                        protocol = &alps_v5_protocol_data;
+                } else if (ec[0] == 0x88 &&
+                           ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
+                        protocol = &alps_v7_protocol_data;
+                } else if (ec[0] == 0x88 && ec[1] == 0x08) {
+                        protocol = &alps_v3_rushmore_data;
+                } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
+                           ec[2] >= 0x90 && ec[2] <= 0x9d) {
+                        protocol = &alps_v3_protocol_data;
+                } else {
+                        psmouse_dbg(psmouse,
+                                    "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
+                        return -EINVAL;
+                }
         }
 
-        psmouse_dbg(psmouse,
-                    "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
+        /* Save the Firmware version */
+        memcpy(priv->fw_ver, ec, 3);
 
-        return -EINVAL;
+        return alps_set_protocol(psmouse, priv, protocol);
 }
 
 static int alps_reconnect(struct psmouse *psmouse)
@@ -2410,9 +2416,6 @@ int alps_init(struct psmouse *psmouse)
                 goto init_fail;
 
         priv->dev2 = dev2;
-        setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
-
-        psmouse->private = priv;
 
         psmouse_reset(psmouse);