[RFC v2 04/10] hid-multitouch: migrated support for Cando panels

Benjamin Tissoires
2011-01-05T17:36:12Z

Migrated support for Cando dual-touch panels to the new HID multitouch driver.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Signed-off-by: Stéphane Chatty <chatty@enac.fr>
---
drivers/hid/Kconfig | 6 -
drivers/hid/Makefile | 1 -
drivers/hid/hid-cando.c | 274 ------------------------------------------
drivers/hid/hid-core.c | 1 +
drivers/hid/hid-multitouch.c | 15 +++
5 files changed, 16 insertions(+), 281 deletions(-)
delete mode 100644 drivers/hid/hid-cando.c

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 6519981..faf27c0 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -94,12 +94,6 @@ config HID_BELKIN
---help---
Support for Belkin Flip KVM and Wireless keyboard.

-config HID_CANDO
- tristate "Cando dual touch panel"
- depends on USB_HID
- ---help---
- Support for Cando dual touch panel.
-
config HID_CHERRY
tristate "Cherry Cymotion keyboard" if EMBEDDED
depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index ec991d4..1a0190d 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -30,7 +30,6 @@ obj-$(CONFIG_HID_A4TECH) += hid-a4tech.o
obj-$(CONFIG_HID_ACRUX_FF) += hid-axff.o
obj-$(CONFIG_HID_APPLE) += hid-apple.o
obj-$(CONFIG_HID_BELKIN) += hid-belkin.o
-obj-$(CONFIG_HID_CANDO) += hid-cando.o
obj-$(CONFIG_HID_CHERRY) += hid-cherry.o
obj-$(CONFIG_HID_CHICONY) += hid-chicony.o
obj-$(CONFIG_HID_CYPRESS) += hid-cypress.o
diff --git a/drivers/hid/hid-cando.c b/drivers/hid/hid-cando.c
deleted file mode 100644
index 5925bdc..0000000
--- a/drivers/hid/hid-cando.c
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * HID driver for Cando dual-touch panels
- *
- * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
- *
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
-
-#include <linux/device.h>
-#include <linux/hid.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-
-MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
-MODULE_DESCRIPTION("Cando dual-touch panel");
-MODULE_LICENSE("GPL");
-
-#include "hid-ids.h"
-
-struct cando_data {
- __u16 x, y;
- __u8 id;
- __s8 oldest; /* id of the oldest finger in previous frame */
- bool valid; /* valid finger data, or just placeholder? */
- bool first; /* is this the first finger in this frame? */
- __s8 firstid; /* id of the first finger in the frame */
- __u16 firstx, firsty; /* (x, y) of the first finger in the frame */
-};
-
-static int cando_input_mapping(struct hid_device *hdev, struct hid_input *hi,
- struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
-{
- switch (usage->hid & HID_USAGE_PAGE) {
-
- case HID_UP_GENDESK:
- switch (usage->hid) {
- case HID_GD_X:
- hid_map_usage(hi, usage, bit, max,
- EV_ABS, ABS_MT_POSITION_X);
- /* touchscreen emulation */
- input_set_abs_params(hi->input, ABS_X,
- field->logical_minimum,
- field->logical_maximum, 0, 0);
- return 1;
- case HID_GD_Y:
- hid_map_usage(hi, usage, bit, max,
- EV_ABS, ABS_MT_POSITION_Y);
- /* touchscreen emulation */
- input_set_abs_params(hi->input, ABS_Y,
- field->logical_minimum,
- field->logical_maximum, 0, 0);
- return 1;
- }
- return 0;
-
- case HID_UP_DIGITIZER:
- switch (usage->hid) {
- case HID_DG_TIPSWITCH:
- case HID_DG_CONTACTMAX:
- return -1;
- case HID_DG_INRANGE:
- /* touchscreen emulation */
- hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
- return 1;
- case HID_DG_CONTACTID:
- hid_map_usage(hi, usage, bit, max,
- EV_ABS, ABS_MT_TRACKING_ID);
- return 1;
- }
- return 0;
- }
-
- return 0;
-}
-
-static int cando_input_mapped(struct hid_device *hdev, struct hid_input *hi,
- struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
-{
- if (usage->type == EV_KEY || usage->type == EV_ABS)
- clear_bit(usage->code, *bit);
-
- return 0;
-}
-
-/*
- * this function is called when a whole finger has been parsed,
- * so that it can decide what to send to the input layer.
- */
-static void cando_filter_event(struct cando_data *td, struct input_dev *input)
-{
- td->first = !td->first; /* touchscreen emulation */
-
- if (!td->valid) {
- /*
- * touchscreen emulation: if this is the second finger and
- * the first was valid, the first was the oldest; if the
- * first was not valid and there was a valid finger in the
- * previous frame, this is a release.
- */
- if (td->first) {
- td->firstid = -1;
- } else if (td->firstid >= 0) {
- input_event(input, EV_ABS, ABS_X, td->firstx);
- input_event(input, EV_ABS, ABS_Y, td->firsty);
- td->oldest = td->firstid;
- } else if (td->oldest >= 0) {
- input_event(input, EV_KEY, BTN_TOUCH, 0);
- td->oldest = -1;
- }
-
- return;
- }
-
- input_event(input, EV_ABS, ABS_MT_TRACKING_ID, td->id);
- input_event(input, EV_ABS, ABS_MT_POSITION_X, td->x);
- input_event(input, EV_ABS, ABS_MT_POSITION_Y, td->y);
-
- input_mt_sync(input);
-
- /*
- * touchscreen emulation: if there was no touching finger previously,
- * emit touch event
- */
- if (td->oldest < 0) {
- input_event(input, EV_KEY, BTN_TOUCH, 1);
- td->oldest = td->id;
- }
-
- /*
- * touchscreen emulation: if this is the first finger, wait for the
- * second; the oldest is then the second if it was the oldest already
- * or if there was no first, the first otherwise.
- */
- if (td->first) {
- td->firstx = td->x;
- td->firsty = td->y;
- td->firstid = td->id;
- } else {
- int x, y, oldest;
- if (td->id == td->oldest || td->firstid < 0) {
- x = td->x;
- y = td->y;
- oldest = td->id;
- } else {
- x = td->firstx;
- y = td->firsty;
- oldest = td->firstid;
- }
- input_event(input, EV_ABS, ABS_X, x);
- input_event(input, EV_ABS, ABS_Y, y);
- td->oldest = oldest;
- }
-}
-
-
-static int cando_event(struct hid_device *hid, struct hid_field *field,
- struct hid_usage *usage, __s32 value)
-{
- struct cando_data *td = hid_get_drvdata(hid);
-
- 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_CONTACTID:
- td->id = value;
- break;
- case HID_GD_X:
- td->x = value;
- break;
- case HID_GD_Y:
- td->y = value;
- cando_filter_event(td, input);
- break;
- case HID_DG_TIPSWITCH:
- /* avoid interference from generic hidinput handling */
- break;
-
- default:
- /* fallback to the generic hidinput handling */
- return 0;
- }
- }
-
- /* we have handled the hidinput part, now remains hiddev */
- if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
- hid->hiddev_hid_event(hid, field, usage, value);
-
- return 1;
-}
-
-static int cando_probe(struct hid_device *hdev, const struct hid_device_id *id)
-{
- int ret;
- struct cando_data *td;
-
- td = kmalloc(sizeof(struct cando_data), GFP_KERNEL);
- if (!td) {
- dev_err(&hdev->dev, "cannot allocate Cando Touch data\n");
- return -ENOMEM;
- }
- hid_set_drvdata(hdev, td);
- td->first = false;
- td->oldest = -1;
- td->valid = false;
-
- ret = hid_parse(hdev);
- if (!ret)
- ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
-
- if (ret)
- kfree(td);
-
- return ret;
-}
-
-static void cando_remove(struct hid_device *hdev)
-{
- hid_hw_stop(hdev);
- kfree(hid_get_drvdata(hdev));
- hid_set_drvdata(hdev, NULL);
-}
-
-static const struct hid_device_id cando_devices[] = {
- { HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
- USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
- { HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
- USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
- { HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
- USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
- { }
-};
-MODULE_DEVICE_TABLE(hid, cando_devices);
-
-static const struct hid_usage_id cando_grabbed_usages[] = {
- { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
- { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
-};
-
-static struct hid_driver cando_driver = {
- .name = "cando-touch",
- .id_table = cando_devices,
- .probe = cando_probe,
- .remove = cando_remove,
- .input_mapping = cando_input_mapping,
- .input_mapped = cando_input_mapped,
- .usage_table = cando_grabbed_usages,
- .event = cando_event,
-};
-
-static int __init cando_init(void)
-{
- return hid_register_driver(&cando_driver);
-}
-
-static void __exit cando_exit(void)
-{
- hid_unregister_driver(&cando_driver);
-}
-
-module_init(cando_init);
-module_exit(cando_exit);
-
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 2b4d9b9..9f1ab80 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1288,6 +1288,7 @@ static const struct hid_device_id hid_blacklist[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_BTC, USB_DEVICE_ID_BTC_EMPREX_REMOTE_2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CANDO, USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHERRY, USB_DEVICE_ID_CHERRY_CYMOTION) },
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index aea0e32..374389e 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -64,6 +64,7 @@ struct mt_class {
/* classes of device behavior */
#define MT_CLS_DEFAULT 0
#define MT_CLS_DUAL1 1
+#define MT_CLS_DUAL2 2

/*
* these device-dependent functions determine what slot corresponds
@@ -75,6 +76,11 @@ static int slot_is_contactid(struct mt_device *td)
return td->curdata.contactid;
}

+static int slot_is_contactnumber(struct mt_device *td)
+{
+ return td->num_received;
+}
+
static int find_slot_from_contactid(struct mt_device *td)
{
int i;
@@ -93,6 +99,7 @@ static int find_slot_from_contactid(struct mt_device *td)
struct mt_class mt_classes[] = {
{ find_slot_from_contactid, 10 }, /* MT_CLS_DEFAULT */
{ slot_is_contactid, 2 }, /* MT_CLS_DUAL1 */
+ { slot_is_contactnumber, 2 }, /* MT_CLS_DUAL2 */
};

static void mt_feature_mapping(struct hid_device *hdev, struct hid_input *hi,
@@ -396,6 +403,14 @@ static const struct hid_device_id mt_devices[] = {
HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },

+ /* Cando panels */
+ { .driver_data = MT_CLS_DUAL2,
+ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+ USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
+ { .driver_data = MT_CLS_DUAL2,
+ HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
+ USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
+
{ }
};
MODULE_DEVICE_TABLE(hid, mt_devices);
--
1.7.3.4