From: Stephane Chatty Date: Mon, 4 Jan 2010 11:04:08 +0000 (+0100) Subject: HID: add support for Stantum multitouch panel X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d3fb5454a8474d5d22c8f8fe4d043b05732d91d5;p=mv-sheeva.git HID: add support for Stantum multitouch panel Added support for the Stantum multitouch panel. Signed-off-by: Stephane Chatty Signed-off-by: Jiri Kosina --- diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 0c8ce3a68d2..84272c69031 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -247,6 +247,12 @@ config HID_SONY ---help--- Support for Sony PS3 controller. +config HID_STANTUM + tristate "Stantum" if EMBEDDED + depends on USB_HID + ---help--- + Support for Stantum multitouch panel. + config HID_SUNPLUS tristate "Sunplus" if EMBEDDED depends on USB_HID diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 1bdfb97910f..f8dc5bac79b 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -40,6 +40,7 @@ obj-$(CONFIG_HID_PETALYNX) += hid-petalynx.o obj-$(CONFIG_HID_SAMSUNG) += hid-samsung.o obj-$(CONFIG_HID_SMARTJOYPLUS) += hid-sjoy.o obj-$(CONFIG_HID_SONY) += hid-sony.o +obj-$(CONFIG_HID_STANTUM) += hid-stantum.o obj-$(CONFIG_HID_SUNPLUS) += hid-sunplus.o obj-$(CONFIG_HID_GREENASIA) += hid-gaff.o obj-$(CONFIG_HID_THRUSTMASTER) += hid-tmff.o diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 70c25a05620..6462c923805 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1339,6 +1339,7 @@ static const struct hid_device_id hid_blacklist[] = { { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) }, { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER) }, { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGX_MOUSE) }, + { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) }, { HID_USB_DEVICE(USB_VENDOR_ID_SUNPLUS, USB_DEVICE_ID_SUNPLUS_WDESKTOP) }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300) }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304) }, diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 3d55f983dba..07e056b0e18 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -393,6 +393,9 @@ #define USB_DEVICE_ID_SOUNDGRAPH_IMON_FIRST 0x0034 #define USB_DEVICE_ID_SOUNDGRAPH_IMON_LAST 0x0046 +#define USB_VENDOR_ID_STANTUM 0x1f87 +#define USB_DEVICE_ID_MTP 0x0002 + #define USB_VENDOR_ID_SUN 0x0430 #define USB_DEVICE_ID_RARITAN_KVM_DONGLE 0xcdab diff --git a/drivers/hid/hid-stantum.c b/drivers/hid/hid-stantum.c new file mode 100644 index 00000000000..add965dab93 --- /dev/null +++ b/drivers/hid/hid-stantum.c @@ -0,0 +1,283 @@ +/* + * HID driver for Stantum multitouch panels + * + * Copyright (c) 2009 Stephane Chatty + * + */ + +/* + * 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 +#include +#include + +MODULE_VERSION("0.6"); +MODULE_AUTHOR("Stephane Chatty "); +MODULE_DESCRIPTION("Stantum HID multitouch panels"); +MODULE_LICENSE("GPL"); + +#include "hid-ids.h" + +struct stantum_data { + __s32 x, y, z, w, h; /* x, y, pressure, width, height */ + __u16 id; /* touch id */ + bool valid; /* valid finger data, or just placeholder? */ + bool first; /* first finger in the HID packet? */ + bool activity; /* at least one active finger so far? */ +}; + +static int stantum_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_INRANGE: + case HID_DG_CONFIDENCE: + case HID_DG_INPUTMODE: + case HID_DG_DEVICEINDEX: + case HID_DG_CONTACTCOUNT: + case HID_DG_CONTACTMAX: + case HID_DG_TIPPRESSURE: + return -1; + + case HID_DG_TIPSWITCH: + /* touchscreen emulation */ + hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH); + return 1; + + case HID_DG_WIDTH: + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TOUCH_MAJOR); + return 1; + case HID_DG_HEIGHT: + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TOUCH_MINOR); + input_set_abs_params(hi->input, ABS_MT_ORIENTATION, + 1, 1, 0, 0); + return 1; + case HID_DG_CONTACTID: + hid_map_usage(hi, usage, bit, max, + EV_ABS, ABS_MT_TRACKING_ID); + return 1; + + } + return 0; + + case 0xff000000: + /* no input-oriented meaning */ + return -1; + } + + return 0; +} + +static int stantum_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 stantum_filter_event(struct stantum_data *sd, + struct input_dev *input) +{ + bool wide; + + if (!sd->valid) { + /* + * touchscreen emulation: if the first finger is not valid and + * there previously was finger activity, this is a release + */ + if (sd->first && sd->activity) { + input_event(input, EV_KEY, BTN_TOUCH, 0); + sd->activity = false; + } + return; + } + + input_event(input, EV_ABS, ABS_MT_TRACKING_ID, sd->id); + input_event(input, EV_ABS, ABS_MT_POSITION_X, sd->x); + input_event(input, EV_ABS, ABS_MT_POSITION_Y, sd->y); + + wide = (sd->w > sd->h); + input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide); + input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, wide ? sd->w : sd->h); + input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, wide ? sd->h : sd->w); + +#if 0 + /* MT_PRESSURE does not exist yet */ + input_event(input, EV_ABS, ABS_MT_PRESSURE, sd->z); +#endif + + input_mt_sync(input); + sd->valid = false; + sd->first = false; + + /* touchscreen emulation */ + if (sd->first) { + if (!sd->activity) { + input_event(input, EV_KEY, BTN_TOUCH, 1); + sd->activity = true; + } + input_event(input, EV_ABS, ABS_X, sd->x); + input_event(input, EV_ABS, ABS_Y, sd->y); + } +} + + +static int stantum_event(struct hid_device *hid, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct stantum_data *sd = hid_get_drvdata(hid); + + if (hid->claimed & HID_CLAIMED_INPUT) { + struct input_dev *input = field->hidinput->input; + + switch (usage->hid) { + case HID_DG_INRANGE: + /* this is the last field in a finger */ + stantum_filter_event(sd, input); + break; + case HID_DG_WIDTH: + sd->w = value; + break; + case HID_DG_HEIGHT: + sd->h = value; + break; + case HID_GD_X: + sd->x = value; + break; + case HID_GD_Y: + sd->y = value; + break; + case HID_DG_TIPPRESSURE: + sd->z = value; + break; + case HID_DG_CONTACTID: + sd->id = value; + break; + case HID_DG_CONFIDENCE: + sd->valid = !!value; + break; + case 0xff000002: + /* this comes only before the first finger */ + sd->first = true; + break; + + default: + /* ignore the others */ + return 1; + } + } + + /* 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 stantum_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + int ret; + struct stantum_data *sd; + + sd = kmalloc(sizeof(struct stantum_data), GFP_KERNEL); + if (!sd) { + dev_err(&hdev->dev, "cannot allocate Stantum data\n"); + return -ENOMEM; + } + sd->valid = false; + sd->first = false; + sd->activity = false; + hid_set_drvdata(hdev, sd); + + ret = hid_parse(hdev); + if (!ret) + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); + + if (ret) + kfree(sd); + + return ret; +} + +static void stantum_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 stantum_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, USB_DEVICE_ID_MTP) }, + { } +}; +MODULE_DEVICE_TABLE(hid, stantum_devices); + +static const struct hid_usage_id stantum_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 stantum_driver = { + .name = "stantum", + .id_table = stantum_devices, + .probe = stantum_probe, + .remove = stantum_remove, + .input_mapping = stantum_input_mapping, + .input_mapped = stantum_input_mapped, + .usage_table = stantum_grabbed_usages, + .event = stantum_event, +}; + +static int __init stantum_init(void) +{ + return hid_register_driver(&stantum_driver); +} + +static void __exit stantum_exit(void) +{ + hid_unregister_driver(&stantum_driver); +} + +module_init(stantum_init); +module_exit(stantum_exit); +