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hid-polostar.c
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hid-polostar.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* HID driver for Polostar devices not fully compliant with HID standard
*
* Copyright (c) 2015 Yann Vernier
*/
/*
* 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/usb.h>
#include "hid-ids.h"
/* Size of the original descriptor of PT-1001 tablets */
#define PT1001_RDESC_ORIG_SIZE 317
/* Fixed PT1001 report descriptor */
static __u8 pt1001_rdesc_fixed[] = {
0x05, 0x01, /* Usage Page (Desktop), */
0x09, 0x02, /* Usage (Mouse), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x01, /* Report ID (1), */
0x09, 0x01, /* Usage (Pointer), */
0xA1, 0x00, /* Collection (Physical), */
0x05, 0x09, /* Usage Page (Button), */
/* Swap mouse buttons for consistency with tablets */
0x09, 0x01, /* Usage (1), */
0x09, 0x03, /* Usage (3), */
0x09, 0x02, /* Usage (2), */
0x09, 0x04, /* Usage (4), */
0x09, 0x05, /* Usage (5), */
0x95, 0x05, /* Report Count (5), */
0x75, 0x01, /* Report Size (1), */
0x15, 0x00, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x03, /* Report Count (3), */
0x81, 0x01, /* Input (Constant), */
0x05, 0x01, /* Usage Page (Desktop), */
0x09, 0x30, /* Usage (X), */
0x09, 0x31, /* Usage (Y), */
0x95, 0x02, /* Report Count (2), */
0x75, 0x10, /* Report Size (16), */
0x16, 0x01, 0x80, /* Logical Minimum (-32767), */
0x26, 0xFF, 0x7F, /* Logical Maximum (32767), */
0x81, 0x06, /* Input (Variable, Relative), */
/* Scroll functionality */
0x15, 0x81, /* Logical Minimum (-127), */
0x25, 0x7F, /* Logical Maximum (127), */
0x75, 0x08, /* Report Size (8), */
0x95, 0x01, /* Report Count (2), */
0x09, 0x38, /* Usage (Wheel), */
0x05, 0x0C, /* Usage Page (Consumer), */
0x0A, 0x38, 0x02, /* Usage (AC Pan), */
0x81, 0x06, /* Input (Variable, Relative), */
0xC0, /* End Collection, */
0xC0, /* End Collection, */
/* Report ID 5 is used for some periphery buttons */
0x05, 0x0C, /* Usage Page (Consumer), */
0x09, 0x01, /* Usage (Consumer Control), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x05, /* Report ID (5), */
0x95, 0x01, /* Report Count (1), */
0x75, 0x08, /* Report Size (8), */
0x81, 0x01, /* Input (Constant), */
0x15, 0x00, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x75, 0x01, /* Report Size (1), */
0x95, 0x12, /* Report Count (18), */
0x0A, 0x83, 0x01, /* Usage (AL Consumer Control Config), */
0x0A, 0x8A, 0x01, /* Usage (AL Email Reader), */
0x0A, 0x92, 0x01, /* Usage (AL Calculator), */
0x0A, 0x94, 0x01, /* Usage (AL Local Machine Brwsr), */
0x0A, 0x21, 0x02, /* Usage (AC Search), */
0x0A, 0x23, 0x02, /* Usage (AC Home), */
0x0A, 0x24, 0x02, /* Usage (AC Back), */
0x0A, 0x25, 0x02, /* Usage (AC Forward), */
0x0A, 0x26, 0x02, /* Usage (AC Stop), */
0x0A, 0x27, 0x02, /* Usage (AC Refresh), */
0x0A, 0x2A, 0x02, /* Usage (AC Bookmarks), */
0x09, 0xB5, /* Usage (Scan Next Track), */
0x09, 0xB6, /* Usage (Scan Previous Track), */
0x09, 0xB7, /* Usage (Stop), */
0x09, 0xCD, /* Usage (Play Pause), */
0x09, 0xE2, /* Usage (Mute), */
0x09, 0xE9, /* Usage (Volume Inc), */
0x09, 0xEA, /* Usage (Volume Dec), */
0x81, 0x62, /* Input (Variable, No Preferred, */
/* Null State), */
0x95, 0x06, /* Report Count (6), */
0x75, 0x01, /* Report Size (1), */
0x81, 0x03, /* Input (Constant, Variable), */
0xC0, /* End Collection, */
/* Report 9 is the primary digitizer report. */
0x05, 0x0D, /* Usage Page (Digitizer), */
0x09, 0x01, /* Usage (Digitizer), */
0xA1, 0x01, /* Collection (Application), */
0x85, 0x09, /* Report ID (9), */
0x09, 0x20, /* Usage (Stylus), */
0xA1, 0x00, /* Collection (Physical), */
0x09, 0x42, /* Usage (Tip Switch), */
0x09, 0x44, /* Usage (Barrel Switch), */
0x09, 0x46, /* Usage (Tablet Pick), */
0x15, 0x00, /* Logical Minimum (0), */
0x25, 0x01, /* Logical Maximum (1), */
0x95, 0x03, /* Report Count (3), */
0x75, 0x01, /* Report Size (1), */
0x81, 0x02, /* Input (Variable), */
0x95, 0x05, /* Report Count (5), */
0x81, 0x01, /* Input (Constant), */
0x15, 0x00, /* Logical Minimum (0), */
0x26, 0x00, 0x10, /* Logical Maximum (4096), */
0x75, 0x10, /* Report Size (16), */
0x95, 0x01, /* Report Count (1), */
0xa4, /* Push */
0x05, 0x01, /* Usage Page (Desktop), */
0x55, 0xfe, /* Unit exponent -2: cm -> 0.1mm */
0x65, 0x11, /* Unit: SI linear centimeters */
0x09, 0x30, /* Usage (X), */
0x35, 0x00, /* Physical Minimum (0), */
0x46, 0x20, 0x04, /* Physical Maximum (1056), */
0x81, 0x02, /* Input (Variable), */
0x09, 0x31, /* Usage (Y), */
0x46, 0x94, 0x02, /* Physical Maximum (660), */
0x81, 0x02, /* Input (Variable), */
0xb4, /* Pop (restore no unit) */
0x09, 0x30, /* Usage (Tip Pressure), */
0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
0x81, 0x02, /* Input (Variable), */
0xC0, /* End Collection, */
0xC0, /* End Collection */
};
static __u8 *polostar_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
struct usb_interface *iface = to_usb_interface(hdev->dev.parent);
__u8 iface_num = iface->cur_altsetting->desc.bInterfaceNumber;
switch (hdev->product) {
case USB_DEVICE_ID_POLOSTAR_TABLET_PT1001:
if (iface_num == 1 && *rsize == PT1001_RDESC_ORIG_SIZE) {
rdesc = pt1001_rdesc_fixed;
*rsize = sizeof(pt1001_rdesc_fixed);
}
break;
}
return rdesc;
}
static int polostar_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
struct usb_interface *iface = to_usb_interface(hdev->dev.parent);
__u8 iface_num = iface->cur_altsetting->desc.bInterfaceNumber;
int rc;
if (hdev->product == USB_DEVICE_ID_POLOSTAR_TABLET_PT1001 &&
iface_num == 2)
return -ENODEV;
hdev->quirks |= id->driver_data;
rc = hid_parse(hdev);
if (rc) {
hid_err(hdev, "parse failed\n");
return rc;
}
rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (rc) {
hid_err(hdev, "hw start failed\n");
return rc;
}
return 0;
}
static const struct hid_device_id polostar_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_POLOSTAR,
USB_DEVICE_ID_POLOSTAR_TABLET_PT1001),
.driver_data = HID_QUIRK_MULTI_INPUT },
{ }
};
MODULE_DEVICE_TABLE(hid, polostar_devices);
static struct hid_driver polostar_driver = {
.name = "polostar",
.id_table = polostar_devices,
.probe = polostar_probe,
.report_fixup = polostar_report_fixup,
};
module_hid_driver(polostar_driver);
MODULE_LICENSE("GPL");
MODULE_VERSION("13");