diff options
| -rw-r--r-- | drivers/hid/hid-egalax.c | 86 |
1 files changed, 23 insertions, 63 deletions
diff --git a/drivers/hid/hid-egalax.c b/drivers/hid/hid-egalax.c index 66b2c5d..38fdaad 100644 --- a/drivers/hid/hid-egalax.c +++ b/drivers/hid/hid-egalax.c @@ -2,6 +2,8 @@ * HID driver for eGalax dual-touch panels * * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr> + * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se> + * Copyright (c) 2010 Canonical, Ltd. * */ @@ -16,6 +18,7 @@ #include <linux/hid.h> #include <linux/module.h> #include <linux/usb.h> +#include <linux/input/mt.h> #include <linux/slab.h> #include "usbhid/usbhid.h" @@ -25,17 +28,17 @@ MODULE_LICENSE("GPL"); #include "hid-ids.h" +#define MAX_SLOTS 2 + /* estimated signal-to-noise ratios */ #define SN_MOVE 4096 #define SN_PRESSURE 32 struct egalax_data { - __u16 x, y, z; - __u8 id; - bool first; /* is this the first finger in the frame? */ - bool valid; /* valid finger data, or just placeholder? */ - bool activity; /* at least one active finger previously? */ - __u16 lastx, lasty, lastz; /* latest valid (x, y, z) in the frame */ + int valid; + int slot; + int touch; + int x, y, z; }; static void set_abs(struct input_dev *input, unsigned int code, @@ -89,9 +92,7 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi, case HID_DG_CONTACTMAX: return -1; case HID_DG_CONTACTID: - hid_map_usage(hi, usage, bit, max, - EV_ABS, ABS_MT_TRACKING_ID); - set_abs(input, ABS_MT_TRACKING_ID, field, 0); + input_mt_init_slots(input, MAX_SLOTS); return 1; case HID_DG_TIPPRESSURE: field->logical_minimum = 0; @@ -125,58 +126,16 @@ static int egalax_input_mapped(struct hid_device *hdev, struct hid_input *hi, */ static void egalax_filter_event(struct egalax_data *td, struct input_dev *input) { - td->first = !td->first; /* touchscreen emulation */ - - if (td->valid) { - /* emit multitouch events */ - input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id); - input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x >> 3); - input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y >> 3); + input_mt_slot(input, td->slot); + input_mt_report_slot_state(input, MT_TOOL_FINGER, td->touch); + if (td->touch) { + input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x); + input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y); input_event(input, EV_ABS, ABS_MT_PRESSURE, td->z); - - input_mt_sync(input); - - /* - * touchscreen emulation: store (x, y) as - * the last valid values in this frame - */ - td->lastx = td->x; - td->lasty = td->y; - td->lastz = td->z; - } - - /* - * touchscreen emulation: if this is the second finger and at least - * one in this frame is valid, the latest valid in the frame is - * the oldest on the panel, the one we want for single touch - */ - if (!td->first && td->activity) { - input_event(input, EV_ABS, ABS_X, td->lastx >> 3); - input_event(input, EV_ABS, ABS_Y, td->lasty >> 3); - input_event(input, EV_ABS, ABS_PRESSURE, td->lastz); - } - - if (!td->valid) { - /* - * touchscreen emulation: if the first finger is invalid - * and there previously was finger activity, this is a release - */ - if (td->first && td->activity) { - input_event(input, EV_KEY, BTN_TOUCH, 0); - td->activity = false; - } - return; - } - - - /* touchscreen emulation: if no previous activity, emit touch event */ - if (!td->activity) { - input_event(input, EV_KEY, BTN_TOUCH, 1); - td->activity = true; } + input_mt_report_pointer_emulation(input, true); } - static int egalax_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) { @@ -186,25 +145,26 @@ static int egalax_event(struct hid_device *hid, struct hid_field *field, * uses a standard parallel multitouch protocol (product ID == * 48xx). The second is capacitive and uses an unusual "serial" * protocol with a different message for each multitouch finger - * (product ID == 72xx). We do not yet generate a correct event - * sequence for the capacitive/serial protocol. + * (product ID == 72xx). */ if (hid->claimed & HID_CLAIMED_INPUT) { struct input_dev *input = field->hidinput->input; switch (usage->hid) { case HID_DG_INRANGE: + td->valid = value; + break; case HID_DG_CONFIDENCE: /* avoid interference from generic hidinput handling */ break; case HID_DG_TIPSWITCH: - td->valid = value; + td->touch = value; break; case HID_DG_TIPPRESSURE: td->z = value; break; case HID_DG_CONTACTID: - td->id = value; + td->slot = clamp_val(value, 0, MAX_SLOTS - 1); break; case HID_GD_X: td->x = value; @@ -212,11 +172,11 @@ static int egalax_event(struct hid_device *hid, struct hid_field *field, case HID_GD_Y: td->y = value; /* this is the last field in a finger */ - egalax_filter_event(td, input); + if (td->valid) + egalax_filter_event(td, input); break; case HID_DG_CONTACTCOUNT: /* touch emulation: this is the last field in a frame */ - td->first = false; break; default: |
