1119 lines
30 KiB
C
1119 lines
30 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* HID driver for UC-Logic devices not fully compliant with HID standard
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* - tablet initialization and parameter retrieval
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*
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* Copyright (c) 2018 Nikolai Kondrashov
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include "hid-uclogic-params.h"
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#include "hid-uclogic-rdesc.h"
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#include "usbhid/usbhid.h"
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#include "hid-ids.h"
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#include <linux/ctype.h>
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#include <asm/unaligned.h>
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/**
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* Convert a pen in-range reporting type to a string.
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*
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* @inrange: The in-range reporting type to convert.
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*
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* Returns:
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* The string representing the type, or NULL if the type is unknown.
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*/
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const char *uclogic_params_pen_inrange_to_str(
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enum uclogic_params_pen_inrange inrange)
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{
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switch (inrange) {
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case UCLOGIC_PARAMS_PEN_INRANGE_NORMAL:
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return "normal";
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case UCLOGIC_PARAMS_PEN_INRANGE_INVERTED:
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return "inverted";
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case UCLOGIC_PARAMS_PEN_INRANGE_NONE:
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return "none";
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default:
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return NULL;
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}
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}
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/**
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* uclogic_params_get_str_desc - retrieve a string descriptor from a HID
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* device interface, putting it into a kmalloc-allocated buffer as is, without
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* character encoding conversion.
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*
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* @pbuf: Location for the kmalloc-allocated buffer pointer containing
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* the retrieved descriptor. Not modified in case of error.
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* Can be NULL to have retrieved descriptor discarded.
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* @hdev: The HID device of the tablet interface to retrieve the string
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* descriptor from. Cannot be NULL.
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* @idx: Index of the string descriptor to request from the device.
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* @len: Length of the buffer to allocate and the data to retrieve.
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*
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* Returns:
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* number of bytes retrieved (<= len),
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* -EPIPE, if the descriptor was not found, or
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* another negative errno code in case of other error.
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*/
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static int uclogic_params_get_str_desc(__u8 **pbuf, struct hid_device *hdev,
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__u8 idx, size_t len)
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{
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int rc;
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struct usb_device *udev = hid_to_usb_dev(hdev);
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__u8 *buf = NULL;
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/* Check arguments */
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if (hdev == NULL) {
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rc = -EINVAL;
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goto cleanup;
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}
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buf = kmalloc(len, GFP_KERNEL);
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if (buf == NULL) {
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rc = -ENOMEM;
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goto cleanup;
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}
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rc = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
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(USB_DT_STRING << 8) + idx,
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0x0409, buf, len,
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USB_CTRL_GET_TIMEOUT);
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if (rc == -EPIPE) {
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hid_dbg(hdev, "string descriptor #%hhu not found\n", idx);
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goto cleanup;
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} else if (rc < 0) {
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hid_err(hdev,
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"failed retrieving string descriptor #%hhu: %d\n",
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idx, rc);
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goto cleanup;
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}
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if (pbuf != NULL) {
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*pbuf = buf;
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buf = NULL;
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}
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cleanup:
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kfree(buf);
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return rc;
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}
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/**
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* uclogic_params_pen_cleanup - free resources used by struct
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* uclogic_params_pen (tablet interface's pen input parameters).
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* Can be called repeatedly.
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*
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* @pen: Pen input parameters to cleanup. Cannot be NULL.
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*/
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static void uclogic_params_pen_cleanup(struct uclogic_params_pen *pen)
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{
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kfree(pen->desc_ptr);
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memset(pen, 0, sizeof(*pen));
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}
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/**
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* uclogic_params_pen_init_v1() - initialize tablet interface pen
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* input and retrieve its parameters from the device, using v1 protocol.
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*
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* @pen: Pointer to the pen parameters to initialize (to be
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* cleaned up with uclogic_params_pen_cleanup()). Not modified in
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* case of error, or if parameters are not found. Cannot be NULL.
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* @pfound: Location for a flag which is set to true if the parameters
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* were found, and to false if not (e.g. device was
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* incompatible). Not modified in case of error. Cannot be NULL.
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* @hdev: The HID device of the tablet interface to initialize and get
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* parameters from. Cannot be NULL.
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*
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* Returns:
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* Zero, if successful. A negative errno code on error.
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*/
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static int uclogic_params_pen_init_v1(struct uclogic_params_pen *pen,
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bool *pfound,
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struct hid_device *hdev)
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{
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int rc;
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bool found = false;
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/* Buffer for (part of) the string descriptor */
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__u8 *buf = NULL;
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/* Minimum descriptor length required, maximum seen so far is 18 */
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const int len = 12;
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s32 resolution;
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/* Pen report descriptor template parameters */
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s32 desc_params[UCLOGIC_RDESC_PEN_PH_ID_NUM];
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__u8 *desc_ptr = NULL;
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/* Check arguments */
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if (pen == NULL || pfound == NULL || hdev == NULL) {
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rc = -EINVAL;
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goto cleanup;
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}
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/*
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* Read string descriptor containing pen input parameters.
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* The specific string descriptor and data were discovered by sniffing
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* the Windows driver traffic.
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* NOTE: This enables fully-functional tablet mode.
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*/
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rc = uclogic_params_get_str_desc(&buf, hdev, 100, len);
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if (rc == -EPIPE) {
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hid_dbg(hdev,
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"string descriptor with pen parameters not found, assuming not compatible\n");
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goto finish;
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} else if (rc < 0) {
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hid_err(hdev, "failed retrieving pen parameters: %d\n", rc);
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goto cleanup;
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} else if (rc != len) {
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hid_dbg(hdev,
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"string descriptor with pen parameters has invalid length (got %d, expected %d), assuming not compatible\n",
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rc, len);
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goto finish;
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}
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/*
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* Fill report descriptor parameters from the string descriptor
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*/
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_LM] =
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get_unaligned_le16(buf + 2);
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_LM] =
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get_unaligned_le16(buf + 4);
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_PRESSURE_LM] =
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get_unaligned_le16(buf + 8);
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resolution = get_unaligned_le16(buf + 10);
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if (resolution == 0) {
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_PM] = 0;
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_PM] = 0;
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} else {
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_PM] =
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_LM] * 1000 /
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resolution;
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_PM] =
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_LM] * 1000 /
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resolution;
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}
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kfree(buf);
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buf = NULL;
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/*
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* Generate pen report descriptor
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*/
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desc_ptr = uclogic_rdesc_template_apply(
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uclogic_rdesc_pen_v1_template_arr,
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uclogic_rdesc_pen_v1_template_size,
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desc_params, ARRAY_SIZE(desc_params));
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if (desc_ptr == NULL) {
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rc = -ENOMEM;
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goto cleanup;
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}
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/*
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* Fill-in the parameters
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*/
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memset(pen, 0, sizeof(*pen));
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pen->desc_ptr = desc_ptr;
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desc_ptr = NULL;
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pen->desc_size = uclogic_rdesc_pen_v1_template_size;
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pen->id = UCLOGIC_RDESC_PEN_V1_ID;
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pen->inrange = UCLOGIC_PARAMS_PEN_INRANGE_INVERTED;
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found = true;
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finish:
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*pfound = found;
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rc = 0;
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cleanup:
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kfree(desc_ptr);
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kfree(buf);
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return rc;
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}
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/**
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* uclogic_params_get_le24() - get a 24-bit little-endian number from a
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* buffer.
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*
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* @p: The pointer to the number buffer.
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*
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* Returns:
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* The retrieved number
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*/
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static s32 uclogic_params_get_le24(const void *p)
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{
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const __u8 *b = p;
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return b[0] | (b[1] << 8UL) | (b[2] << 16UL);
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}
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/**
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* uclogic_params_pen_init_v2() - initialize tablet interface pen
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* input and retrieve its parameters from the device, using v2 protocol.
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*
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* @pen: Pointer to the pen parameters to initialize (to be
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* cleaned up with uclogic_params_pen_cleanup()). Not modified in
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* case of error, or if parameters are not found. Cannot be NULL.
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* @pfound: Location for a flag which is set to true if the parameters
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* were found, and to false if not (e.g. device was
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* incompatible). Not modified in case of error. Cannot be NULL.
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* @hdev: The HID device of the tablet interface to initialize and get
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* parameters from. Cannot be NULL.
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*
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* Returns:
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* Zero, if successful. A negative errno code on error.
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*/
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static int uclogic_params_pen_init_v2(struct uclogic_params_pen *pen,
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bool *pfound,
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struct hid_device *hdev)
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{
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int rc;
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bool found = false;
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/* Buffer for (part of) the string descriptor */
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__u8 *buf = NULL;
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/* Descriptor length required */
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const int len = 18;
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s32 resolution;
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/* Pen report descriptor template parameters */
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s32 desc_params[UCLOGIC_RDESC_PEN_PH_ID_NUM];
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__u8 *desc_ptr = NULL;
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/* Check arguments */
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if (pen == NULL || pfound == NULL || hdev == NULL) {
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rc = -EINVAL;
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goto cleanup;
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}
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/*
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* Read string descriptor containing pen input parameters.
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* The specific string descriptor and data were discovered by sniffing
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* the Windows driver traffic.
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* NOTE: This enables fully-functional tablet mode.
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*/
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rc = uclogic_params_get_str_desc(&buf, hdev, 200, len);
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if (rc == -EPIPE) {
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hid_dbg(hdev,
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"string descriptor with pen parameters not found, assuming not compatible\n");
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goto finish;
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} else if (rc < 0) {
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hid_err(hdev, "failed retrieving pen parameters: %d\n", rc);
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goto cleanup;
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} else if (rc != len) {
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hid_dbg(hdev,
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"string descriptor with pen parameters has invalid length (got %d, expected %d), assuming not compatible\n",
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rc, len);
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goto finish;
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} else {
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size_t i;
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/*
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* Check it's not just a catch-all UTF-16LE-encoded ASCII
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* string (such as the model name) some tablets put into all
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* unknown string descriptors.
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*/
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for (i = 2;
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i < len &&
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(buf[i] >= 0x20 && buf[i] < 0x7f && buf[i + 1] == 0);
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i += 2);
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if (i >= len) {
|
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hid_dbg(hdev,
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"string descriptor with pen parameters seems to contain only text, assuming not compatible\n");
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goto finish;
|
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}
|
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}
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|
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/*
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|
* Fill report descriptor parameters from the string descriptor
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*/
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_LM] =
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uclogic_params_get_le24(buf + 2);
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_LM] =
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uclogic_params_get_le24(buf + 5);
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_PRESSURE_LM] =
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get_unaligned_le16(buf + 8);
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resolution = get_unaligned_le16(buf + 10);
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if (resolution == 0) {
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_PM] = 0;
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_PM] = 0;
|
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} else {
|
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_PM] =
|
|
desc_params[UCLOGIC_RDESC_PEN_PH_ID_X_LM] * 1000 /
|
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resolution;
|
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_PM] =
|
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desc_params[UCLOGIC_RDESC_PEN_PH_ID_Y_LM] * 1000 /
|
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resolution;
|
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}
|
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kfree(buf);
|
|
buf = NULL;
|
|
|
|
/*
|
|
* Generate pen report descriptor
|
|
*/
|
|
desc_ptr = uclogic_rdesc_template_apply(
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|
uclogic_rdesc_pen_v2_template_arr,
|
|
uclogic_rdesc_pen_v2_template_size,
|
|
desc_params, ARRAY_SIZE(desc_params));
|
|
if (desc_ptr == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Fill-in the parameters
|
|
*/
|
|
memset(pen, 0, sizeof(*pen));
|
|
pen->desc_ptr = desc_ptr;
|
|
desc_ptr = NULL;
|
|
pen->desc_size = uclogic_rdesc_pen_v2_template_size;
|
|
pen->id = UCLOGIC_RDESC_PEN_V2_ID;
|
|
pen->inrange = UCLOGIC_PARAMS_PEN_INRANGE_NONE;
|
|
pen->fragmented_hires = true;
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|
found = true;
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|
finish:
|
|
*pfound = found;
|
|
rc = 0;
|
|
cleanup:
|
|
kfree(desc_ptr);
|
|
kfree(buf);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_frame_cleanup - free resources used by struct
|
|
* uclogic_params_frame (tablet interface's frame controls input parameters).
|
|
* Can be called repeatedly.
|
|
*
|
|
* @frame: Frame controls input parameters to cleanup. Cannot be NULL.
|
|
*/
|
|
static void uclogic_params_frame_cleanup(struct uclogic_params_frame *frame)
|
|
{
|
|
kfree(frame->desc_ptr);
|
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memset(frame, 0, sizeof(*frame));
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_frame_init_with_desc() - initialize tablet's frame control
|
|
* parameters with a static report descriptor.
|
|
*
|
|
* @frame: Pointer to the frame parameters to initialize (to be cleaned
|
|
* up with uclogic_params_frame_cleanup()). Not modified in case
|
|
* of error. Cannot be NULL.
|
|
* @desc_ptr: Report descriptor pointer. Can be NULL, if desc_size is zero.
|
|
* @desc_size: Report descriptor size.
|
|
* @id: Report ID used for frame reports, if they should be tweaked,
|
|
* zero if not.
|
|
*
|
|
* Returns:
|
|
* Zero, if successful. A negative errno code on error.
|
|
*/
|
|
static int uclogic_params_frame_init_with_desc(
|
|
struct uclogic_params_frame *frame,
|
|
const __u8 *desc_ptr,
|
|
size_t desc_size,
|
|
unsigned int id)
|
|
{
|
|
__u8 *copy_desc_ptr;
|
|
|
|
if (frame == NULL || (desc_ptr == NULL && desc_size != 0))
|
|
return -EINVAL;
|
|
|
|
copy_desc_ptr = kmemdup(desc_ptr, desc_size, GFP_KERNEL);
|
|
if (copy_desc_ptr == NULL)
|
|
return -ENOMEM;
|
|
|
|
memset(frame, 0, sizeof(*frame));
|
|
frame->desc_ptr = copy_desc_ptr;
|
|
frame->desc_size = desc_size;
|
|
frame->id = id;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_frame_init_v1_buttonpad() - initialize abstract buttonpad
|
|
* on a v1 tablet interface.
|
|
*
|
|
* @frame: Pointer to the frame parameters to initialize (to be cleaned
|
|
* up with uclogic_params_frame_cleanup()). Not modified in case
|
|
* of error, or if parameters are not found. Cannot be NULL.
|
|
* @pfound: Location for a flag which is set to true if the parameters
|
|
* were found, and to false if not (e.g. device was
|
|
* incompatible). Not modified in case of error. Cannot be NULL.
|
|
* @hdev: The HID device of the tablet interface to initialize and get
|
|
* parameters from. Cannot be NULL.
|
|
*
|
|
* Returns:
|
|
* Zero, if successful. A negative errno code on error.
|
|
*/
|
|
static int uclogic_params_frame_init_v1_buttonpad(
|
|
struct uclogic_params_frame *frame,
|
|
bool *pfound,
|
|
struct hid_device *hdev)
|
|
{
|
|
int rc;
|
|
bool found = false;
|
|
struct usb_device *usb_dev = hid_to_usb_dev(hdev);
|
|
char *str_buf = NULL;
|
|
const size_t str_len = 16;
|
|
|
|
/* Check arguments */
|
|
if (frame == NULL || pfound == NULL || hdev == NULL) {
|
|
rc = -EINVAL;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Enable generic button mode
|
|
*/
|
|
str_buf = kzalloc(str_len, GFP_KERNEL);
|
|
if (str_buf == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
|
|
rc = usb_string(usb_dev, 123, str_buf, str_len);
|
|
if (rc == -EPIPE) {
|
|
hid_dbg(hdev,
|
|
"generic button -enabling string descriptor not found\n");
|
|
} else if (rc < 0) {
|
|
goto cleanup;
|
|
} else if (strncmp(str_buf, "HK On", rc) != 0) {
|
|
hid_dbg(hdev,
|
|
"invalid response to enabling generic buttons: \"%s\"\n",
|
|
str_buf);
|
|
} else {
|
|
hid_dbg(hdev, "generic buttons enabled\n");
|
|
rc = uclogic_params_frame_init_with_desc(
|
|
frame,
|
|
uclogic_rdesc_buttonpad_v1_arr,
|
|
uclogic_rdesc_buttonpad_v1_size,
|
|
UCLOGIC_RDESC_BUTTONPAD_V1_ID);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
found = true;
|
|
}
|
|
|
|
*pfound = found;
|
|
rc = 0;
|
|
cleanup:
|
|
kfree(str_buf);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_cleanup - free resources used by struct uclogic_params
|
|
* (tablet interface's parameters).
|
|
* Can be called repeatedly.
|
|
*
|
|
* @params: Input parameters to cleanup. Cannot be NULL.
|
|
*/
|
|
void uclogic_params_cleanup(struct uclogic_params *params)
|
|
{
|
|
if (!params->invalid) {
|
|
kfree(params->desc_ptr);
|
|
if (!params->pen_unused)
|
|
uclogic_params_pen_cleanup(¶ms->pen);
|
|
uclogic_params_frame_cleanup(¶ms->frame);
|
|
memset(params, 0, sizeof(*params));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a replacement report descriptor for a tablet's interface.
|
|
*
|
|
* @params: The parameters of a tablet interface to get report
|
|
* descriptor for. Cannot be NULL.
|
|
* @pdesc: Location for the resulting, kmalloc-allocated report
|
|
* descriptor pointer, or for NULL, if there's no replacement
|
|
* report descriptor. Not modified in case of error. Cannot be
|
|
* NULL.
|
|
* @psize: Location for the resulting report descriptor size, not set if
|
|
* there's no replacement report descriptor. Not modified in case
|
|
* of error. Cannot be NULL.
|
|
*
|
|
* Returns:
|
|
* Zero, if successful.
|
|
* -EINVAL, if invalid arguments are supplied.
|
|
* -ENOMEM, if failed to allocate memory.
|
|
*/
|
|
int uclogic_params_get_desc(const struct uclogic_params *params,
|
|
__u8 **pdesc,
|
|
unsigned int *psize)
|
|
{
|
|
bool common_present;
|
|
bool pen_present;
|
|
bool frame_present;
|
|
unsigned int size;
|
|
__u8 *desc = NULL;
|
|
|
|
/* Check arguments */
|
|
if (params == NULL || pdesc == NULL || psize == NULL)
|
|
return -EINVAL;
|
|
|
|
size = 0;
|
|
|
|
common_present = (params->desc_ptr != NULL);
|
|
pen_present = (!params->pen_unused && params->pen.desc_ptr != NULL);
|
|
frame_present = (params->frame.desc_ptr != NULL);
|
|
|
|
if (common_present)
|
|
size += params->desc_size;
|
|
if (pen_present)
|
|
size += params->pen.desc_size;
|
|
if (frame_present)
|
|
size += params->frame.desc_size;
|
|
|
|
if (common_present || pen_present || frame_present) {
|
|
__u8 *p;
|
|
|
|
desc = kmalloc(size, GFP_KERNEL);
|
|
if (desc == NULL)
|
|
return -ENOMEM;
|
|
p = desc;
|
|
|
|
if (common_present) {
|
|
memcpy(p, params->desc_ptr,
|
|
params->desc_size);
|
|
p += params->desc_size;
|
|
}
|
|
if (pen_present) {
|
|
memcpy(p, params->pen.desc_ptr,
|
|
params->pen.desc_size);
|
|
p += params->pen.desc_size;
|
|
}
|
|
if (frame_present) {
|
|
memcpy(p, params->frame.desc_ptr,
|
|
params->frame.desc_size);
|
|
p += params->frame.desc_size;
|
|
}
|
|
|
|
WARN_ON(p != desc + size);
|
|
|
|
*psize = size;
|
|
}
|
|
|
|
*pdesc = desc;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_init_invalid() - initialize tablet interface parameters,
|
|
* specifying the interface is invalid.
|
|
*
|
|
* @params: Parameters to initialize (to be cleaned with
|
|
* uclogic_params_cleanup()). Cannot be NULL.
|
|
*/
|
|
static void uclogic_params_init_invalid(struct uclogic_params *params)
|
|
{
|
|
params->invalid = true;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_init_with_opt_desc() - initialize tablet interface
|
|
* parameters with an optional replacement report descriptor. Only modify
|
|
* report descriptor, if the original report descriptor matches the expected
|
|
* size.
|
|
*
|
|
* @params: Parameters to initialize (to be cleaned with
|
|
* uclogic_params_cleanup()). Not modified in case of
|
|
* error. Cannot be NULL.
|
|
* @hdev: The HID device of the tablet interface create the
|
|
* parameters for. Cannot be NULL.
|
|
* @orig_desc_size: Expected size of the original report descriptor to
|
|
* be replaced.
|
|
* @desc_ptr: Pointer to the replacement report descriptor.
|
|
* Can be NULL, if desc_size is zero.
|
|
* @desc_size: Size of the replacement report descriptor.
|
|
*
|
|
* Returns:
|
|
* Zero, if successful. -EINVAL if an invalid argument was passed.
|
|
* -ENOMEM, if failed to allocate memory.
|
|
*/
|
|
static int uclogic_params_init_with_opt_desc(struct uclogic_params *params,
|
|
struct hid_device *hdev,
|
|
unsigned int orig_desc_size,
|
|
__u8 *desc_ptr,
|
|
unsigned int desc_size)
|
|
{
|
|
__u8 *desc_copy_ptr = NULL;
|
|
unsigned int desc_copy_size;
|
|
int rc;
|
|
|
|
/* Check arguments */
|
|
if (params == NULL || hdev == NULL ||
|
|
(desc_ptr == NULL && desc_size != 0)) {
|
|
rc = -EINVAL;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Replace report descriptor, if it matches */
|
|
if (hdev->dev_rsize == orig_desc_size) {
|
|
hid_dbg(hdev,
|
|
"device report descriptor matches the expected size, replacing\n");
|
|
desc_copy_ptr = kmemdup(desc_ptr, desc_size, GFP_KERNEL);
|
|
if (desc_copy_ptr == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
desc_copy_size = desc_size;
|
|
} else {
|
|
hid_dbg(hdev,
|
|
"device report descriptor doesn't match the expected size (%u != %u), preserving\n",
|
|
hdev->dev_rsize, orig_desc_size);
|
|
desc_copy_ptr = NULL;
|
|
desc_copy_size = 0;
|
|
}
|
|
|
|
/* Output parameters */
|
|
memset(params, 0, sizeof(*params));
|
|
params->desc_ptr = desc_copy_ptr;
|
|
desc_copy_ptr = NULL;
|
|
params->desc_size = desc_copy_size;
|
|
|
|
rc = 0;
|
|
cleanup:
|
|
kfree(desc_copy_ptr);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_init_with_pen_unused() - initialize tablet interface
|
|
* parameters preserving original reports and generic HID processing, but
|
|
* disabling pen usage.
|
|
*
|
|
* @params: Parameters to initialize (to be cleaned with
|
|
* uclogic_params_cleanup()). Not modified in case of
|
|
* error. Cannot be NULL.
|
|
*/
|
|
static void uclogic_params_init_with_pen_unused(struct uclogic_params *params)
|
|
{
|
|
memset(params, 0, sizeof(*params));
|
|
params->pen_unused = true;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_init() - initialize a Huion tablet interface and discover
|
|
* its parameters.
|
|
*
|
|
* @params: Parameters to fill in (to be cleaned with
|
|
* uclogic_params_cleanup()). Not modified in case of error.
|
|
* Cannot be NULL.
|
|
* @hdev: The HID device of the tablet interface to initialize and get
|
|
* parameters from. Cannot be NULL.
|
|
*
|
|
* Returns:
|
|
* Zero, if successful. A negative errno code on error.
|
|
*/
|
|
static int uclogic_params_huion_init(struct uclogic_params *params,
|
|
struct hid_device *hdev)
|
|
{
|
|
int rc;
|
|
struct usb_device *udev = hid_to_usb_dev(hdev);
|
|
struct usb_interface *iface = to_usb_interface(hdev->dev.parent);
|
|
__u8 bInterfaceNumber = iface->cur_altsetting->desc.bInterfaceNumber;
|
|
bool found;
|
|
/* The resulting parameters (noop) */
|
|
struct uclogic_params p = {0, };
|
|
static const char transition_ver[] = "HUION_T153_160607";
|
|
char *ver_ptr = NULL;
|
|
const size_t ver_len = sizeof(transition_ver) + 1;
|
|
|
|
/* Check arguments */
|
|
if (params == NULL || hdev == NULL) {
|
|
rc = -EINVAL;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* If it's not a pen interface */
|
|
if (bInterfaceNumber != 0) {
|
|
/* TODO: Consider marking the interface invalid */
|
|
uclogic_params_init_with_pen_unused(&p);
|
|
goto output;
|
|
}
|
|
|
|
/* Try to get firmware version */
|
|
ver_ptr = kzalloc(ver_len, GFP_KERNEL);
|
|
if (ver_ptr == NULL) {
|
|
rc = -ENOMEM;
|
|
goto cleanup;
|
|
}
|
|
rc = usb_string(udev, 201, ver_ptr, ver_len);
|
|
if (rc == -EPIPE) {
|
|
*ver_ptr = '\0';
|
|
} else if (rc < 0) {
|
|
hid_err(hdev,
|
|
"failed retrieving Huion firmware version: %d\n", rc);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* If this is a transition firmware */
|
|
if (strcmp(ver_ptr, transition_ver) == 0) {
|
|
hid_dbg(hdev,
|
|
"transition firmware detected, not probing pen v2 parameters\n");
|
|
} else {
|
|
/* Try to probe v2 pen parameters */
|
|
rc = uclogic_params_pen_init_v2(&p.pen, &found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev,
|
|
"failed probing pen v2 parameters: %d\n", rc);
|
|
goto cleanup;
|
|
} else if (found) {
|
|
hid_dbg(hdev, "pen v2 parameters found\n");
|
|
/* Create v2 buttonpad parameters */
|
|
rc = uclogic_params_frame_init_with_desc(
|
|
&p.frame,
|
|
uclogic_rdesc_buttonpad_v2_arr,
|
|
uclogic_rdesc_buttonpad_v2_size,
|
|
UCLOGIC_RDESC_BUTTONPAD_V2_ID);
|
|
if (rc != 0) {
|
|
hid_err(hdev,
|
|
"failed creating v2 buttonpad parameters: %d\n",
|
|
rc);
|
|
goto cleanup;
|
|
}
|
|
/* Set bitmask marking frame reports in pen reports */
|
|
p.pen_frame_flag = 0x20;
|
|
goto output;
|
|
}
|
|
hid_dbg(hdev, "pen v2 parameters not found\n");
|
|
}
|
|
|
|
/* Try to probe v1 pen parameters */
|
|
rc = uclogic_params_pen_init_v1(&p.pen, &found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev,
|
|
"failed probing pen v1 parameters: %d\n", rc);
|
|
goto cleanup;
|
|
} else if (found) {
|
|
hid_dbg(hdev, "pen v1 parameters found\n");
|
|
/* Try to probe v1 buttonpad */
|
|
rc = uclogic_params_frame_init_v1_buttonpad(
|
|
&p.frame,
|
|
&found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev, "v1 buttonpad probing failed: %d\n", rc);
|
|
goto cleanup;
|
|
}
|
|
hid_dbg(hdev, "buttonpad v1 parameters%s found\n",
|
|
(found ? "" : " not"));
|
|
if (found) {
|
|
/* Set bitmask marking frame reports */
|
|
p.pen_frame_flag = 0x20;
|
|
}
|
|
goto output;
|
|
}
|
|
hid_dbg(hdev, "pen v1 parameters not found\n");
|
|
|
|
uclogic_params_init_invalid(&p);
|
|
|
|
output:
|
|
/* Output parameters */
|
|
memcpy(params, &p, sizeof(*params));
|
|
memset(&p, 0, sizeof(p));
|
|
rc = 0;
|
|
cleanup:
|
|
kfree(ver_ptr);
|
|
uclogic_params_cleanup(&p);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* uclogic_params_init() - initialize a tablet interface and discover its
|
|
* parameters.
|
|
*
|
|
* @params: Parameters to fill in (to be cleaned with
|
|
* uclogic_params_cleanup()). Not modified in case of error.
|
|
* Cannot be NULL.
|
|
* @hdev: The HID device of the tablet interface to initialize and get
|
|
* parameters from. Cannot be NULL. Must be using the USB low-level
|
|
* driver, i.e. be an actual USB tablet.
|
|
*
|
|
* Returns:
|
|
* Zero, if successful. A negative errno code on error.
|
|
*/
|
|
int uclogic_params_init(struct uclogic_params *params,
|
|
struct hid_device *hdev)
|
|
{
|
|
int rc;
|
|
struct usb_device *udev = hid_to_usb_dev(hdev);
|
|
__u8 bNumInterfaces = udev->config->desc.bNumInterfaces;
|
|
struct usb_interface *iface = to_usb_interface(hdev->dev.parent);
|
|
__u8 bInterfaceNumber = iface->cur_altsetting->desc.bInterfaceNumber;
|
|
bool found;
|
|
/* The resulting parameters (noop) */
|
|
struct uclogic_params p = {0, };
|
|
|
|
/* Check arguments */
|
|
if (params == NULL || hdev == NULL ||
|
|
!hid_is_using_ll_driver(hdev, &usb_hid_driver)) {
|
|
rc = -EINVAL;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Set replacement report descriptor if the original matches the
|
|
* specified size. Otherwise keep interface unchanged.
|
|
*/
|
|
#define WITH_OPT_DESC(_orig_desc_token, _new_desc_token) \
|
|
uclogic_params_init_with_opt_desc( \
|
|
&p, hdev, \
|
|
UCLOGIC_RDESC_##_orig_desc_token##_SIZE, \
|
|
uclogic_rdesc_##_new_desc_token##_arr, \
|
|
uclogic_rdesc_##_new_desc_token##_size)
|
|
|
|
#define VID_PID(_vid, _pid) \
|
|
(((__u32)(_vid) << 16) | ((__u32)(_pid) & U16_MAX))
|
|
|
|
/*
|
|
* Handle specific interfaces for specific tablets.
|
|
*
|
|
* Observe the following logic:
|
|
*
|
|
* If the interface is recognized as producing certain useful input:
|
|
* Mark interface as valid.
|
|
* Output interface parameters.
|
|
* Else, if the interface is recognized as *not* producing any useful
|
|
* input:
|
|
* Mark interface as invalid.
|
|
* Else:
|
|
* Mark interface as valid.
|
|
* Output noop parameters.
|
|
*
|
|
* Rule of thumb: it is better to disable a broken interface than let
|
|
* it spew garbage input.
|
|
*/
|
|
|
|
switch (VID_PID(hdev->vendor, hdev->product)) {
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_TABLET_PF1209):
|
|
rc = WITH_OPT_DESC(PF1209_ORIG, pf1209_fixed);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_TABLET_WP4030U):
|
|
rc = WITH_OPT_DESC(WPXXXXU_ORIG, wp4030u_fixed);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_TABLET_WP5540U):
|
|
if (hdev->dev_rsize == UCLOGIC_RDESC_WP5540U_V2_ORIG_SIZE) {
|
|
if (bInterfaceNumber == 0) {
|
|
/* Try to probe v1 pen parameters */
|
|
rc = uclogic_params_pen_init_v1(&p.pen,
|
|
&found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev,
|
|
"pen probing failed: %d\n",
|
|
rc);
|
|
goto cleanup;
|
|
}
|
|
if (!found) {
|
|
hid_warn(hdev,
|
|
"pen parameters not found");
|
|
}
|
|
} else {
|
|
uclogic_params_init_invalid(&p);
|
|
}
|
|
} else {
|
|
rc = WITH_OPT_DESC(WPXXXXU_ORIG, wp5540u_fixed);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
}
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_TABLET_WP8060U):
|
|
rc = WITH_OPT_DESC(WPXXXXU_ORIG, wp8060u_fixed);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_TABLET_WP1062):
|
|
rc = WITH_OPT_DESC(WP1062_ORIG, wp1062_fixed);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850):
|
|
switch (bInterfaceNumber) {
|
|
case 0:
|
|
rc = WITH_OPT_DESC(TWHL850_ORIG0, twhl850_fixed0);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case 1:
|
|
rc = WITH_OPT_DESC(TWHL850_ORIG1, twhl850_fixed1);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case 2:
|
|
rc = WITH_OPT_DESC(TWHL850_ORIG2, twhl850_fixed2);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
}
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60):
|
|
/*
|
|
* If it is not a three-interface version, which is known to
|
|
* respond to initialization.
|
|
*/
|
|
if (bNumInterfaces != 3) {
|
|
switch (bInterfaceNumber) {
|
|
case 0:
|
|
rc = WITH_OPT_DESC(TWHA60_ORIG0,
|
|
twha60_fixed0);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case 1:
|
|
rc = WITH_OPT_DESC(TWHA60_ORIG1,
|
|
twha60_fixed1);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
/* FALL THROUGH */
|
|
case VID_PID(USB_VENDOR_ID_HUION,
|
|
USB_DEVICE_ID_HUION_TABLET):
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_HUION_TABLET):
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_YIYNOVA_TABLET):
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_81):
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_DRAWIMAGE_G3):
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_45):
|
|
case VID_PID(USB_VENDOR_ID_UCLOGIC,
|
|
USB_DEVICE_ID_UCLOGIC_UGEE_TABLET_47):
|
|
rc = uclogic_params_huion_init(&p, hdev);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UGTIZER,
|
|
USB_DEVICE_ID_UGTIZER_TABLET_GP0610):
|
|
case VID_PID(USB_VENDOR_ID_UGEE,
|
|
USB_DEVICE_ID_UGEE_XPPEN_TABLET_G540):
|
|
case VID_PID(USB_VENDOR_ID_UGEE,
|
|
USB_DEVICE_ID_UGEE_XPPEN_TABLET_G640):
|
|
/* If this is the pen interface */
|
|
if (bInterfaceNumber == 1) {
|
|
/* Probe v1 pen parameters */
|
|
rc = uclogic_params_pen_init_v1(&p.pen, &found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev, "pen probing failed: %d\n", rc);
|
|
goto cleanup;
|
|
}
|
|
if (!found) {
|
|
hid_warn(hdev, "pen parameters not found");
|
|
uclogic_params_init_invalid(&p);
|
|
}
|
|
} else {
|
|
/* TODO: Consider marking the interface invalid */
|
|
uclogic_params_init_with_pen_unused(&p);
|
|
}
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UGEE,
|
|
USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO01):
|
|
/* If this is the pen and frame interface */
|
|
if (bInterfaceNumber == 1) {
|
|
/* Probe v1 pen parameters */
|
|
rc = uclogic_params_pen_init_v1(&p.pen, &found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev, "pen probing failed: %d\n", rc);
|
|
goto cleanup;
|
|
}
|
|
/* Initialize frame parameters */
|
|
rc = uclogic_params_frame_init_with_desc(
|
|
&p.frame,
|
|
uclogic_rdesc_xppen_deco01_frame_arr,
|
|
uclogic_rdesc_xppen_deco01_frame_size,
|
|
0);
|
|
if (rc != 0)
|
|
goto cleanup;
|
|
} else {
|
|
/* TODO: Consider marking the interface invalid */
|
|
uclogic_params_init_with_pen_unused(&p);
|
|
}
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UGEE,
|
|
USB_DEVICE_ID_UGEE_TABLET_G5):
|
|
/* Ignore non-pen interfaces */
|
|
if (bInterfaceNumber != 1) {
|
|
uclogic_params_init_invalid(&p);
|
|
break;
|
|
}
|
|
|
|
rc = uclogic_params_pen_init_v1(&p.pen, &found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev, "pen probing failed: %d\n", rc);
|
|
goto cleanup;
|
|
} else if (found) {
|
|
rc = uclogic_params_frame_init_with_desc(
|
|
&p.frame,
|
|
uclogic_rdesc_ugee_g5_frame_arr,
|
|
uclogic_rdesc_ugee_g5_frame_size,
|
|
UCLOGIC_RDESC_UGEE_G5_FRAME_ID);
|
|
if (rc != 0) {
|
|
hid_err(hdev,
|
|
"failed creating buttonpad parameters: %d\n",
|
|
rc);
|
|
goto cleanup;
|
|
}
|
|
p.frame.re_lsb =
|
|
UCLOGIC_RDESC_UGEE_G5_FRAME_RE_LSB;
|
|
p.frame.dev_id_byte =
|
|
UCLOGIC_RDESC_UGEE_G5_FRAME_DEV_ID_BYTE;
|
|
} else {
|
|
hid_warn(hdev, "pen parameters not found");
|
|
uclogic_params_init_invalid(&p);
|
|
}
|
|
|
|
break;
|
|
case VID_PID(USB_VENDOR_ID_UGEE,
|
|
USB_DEVICE_ID_UGEE_TABLET_EX07S):
|
|
/* Ignore non-pen interfaces */
|
|
if (bInterfaceNumber != 1) {
|
|
uclogic_params_init_invalid(&p);
|
|
break;
|
|
}
|
|
|
|
rc = uclogic_params_pen_init_v1(&p.pen, &found, hdev);
|
|
if (rc != 0) {
|
|
hid_err(hdev, "pen probing failed: %d\n", rc);
|
|
goto cleanup;
|
|
} else if (found) {
|
|
rc = uclogic_params_frame_init_with_desc(
|
|
&p.frame,
|
|
uclogic_rdesc_ugee_ex07_buttonpad_arr,
|
|
uclogic_rdesc_ugee_ex07_buttonpad_size,
|
|
0);
|
|
if (rc != 0) {
|
|
hid_err(hdev,
|
|
"failed creating buttonpad parameters: %d\n",
|
|
rc);
|
|
goto cleanup;
|
|
}
|
|
} else {
|
|
hid_warn(hdev, "pen parameters not found");
|
|
uclogic_params_init_invalid(&p);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
#undef VID_PID
|
|
#undef WITH_OPT_DESC
|
|
|
|
/* Output parameters */
|
|
memcpy(params, &p, sizeof(*params));
|
|
memset(&p, 0, sizeof(p));
|
|
rc = 0;
|
|
cleanup:
|
|
uclogic_params_cleanup(&p);
|
|
return rc;
|
|
}
|