--- zzzz-none-000/linux-3.10.107/drivers/hid/hid-uclogic.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/hid/hid-uclogic.c 2021-02-04 17:41:59.000000000 +0000 @@ -1,7 +1,8 @@ /* * HID driver for UC-Logic devices not fully compliant with HID standard * - * Copyright (c) 2010 Nikolai Kondrashov + * Copyright (c) 2010-2014 Nikolai Kondrashov + * Copyright (c) 2013 Martin Rusko */ /* @@ -15,6 +16,8 @@ #include #include #include +#include +#include "usbhid/usbhid.h" #include "hid-ids.h" @@ -546,11 +549,93 @@ 0xC0 /* End Collection */ }; +/* Report descriptor template placeholder head */ +#define UCLOGIC_PH_HEAD 0xFE, 0xED, 0x1D + +/* Report descriptor template placeholder IDs */ +enum uclogic_ph_id { + UCLOGIC_PH_ID_X_LM, + UCLOGIC_PH_ID_X_PM, + UCLOGIC_PH_ID_Y_LM, + UCLOGIC_PH_ID_Y_PM, + UCLOGIC_PH_ID_PRESSURE_LM, + UCLOGIC_PH_ID_NUM +}; + +/* Report descriptor template placeholder */ +#define UCLOGIC_PH(_ID) UCLOGIC_PH_HEAD, UCLOGIC_PH_ID_##_ID +#define UCLOGIC_PEN_REPORT_ID 0x07 + +/* Fixed report descriptor template */ +static const __u8 uclogic_tablet_rdesc_template[] = { + 0x05, 0x0D, /* Usage Page (Digitizer), */ + 0x09, 0x02, /* Usage (Pen), */ + 0xA1, 0x01, /* Collection (Application), */ + 0x85, 0x07, /* Report ID (7), */ + 0x09, 0x20, /* Usage (Stylus), */ + 0xA0, /* Collection (Physical), */ + 0x14, /* Logical Minimum (0), */ + 0x25, 0x01, /* Logical Maximum (1), */ + 0x75, 0x01, /* Report Size (1), */ + 0x09, 0x42, /* Usage (Tip Switch), */ + 0x09, 0x44, /* Usage (Barrel Switch), */ + 0x09, 0x46, /* Usage (Tablet Pick), */ + 0x95, 0x03, /* Report Count (3), */ + 0x81, 0x02, /* Input (Variable), */ + 0x95, 0x03, /* Report Count (3), */ + 0x81, 0x03, /* Input (Constant, Variable), */ + 0x09, 0x32, /* Usage (In Range), */ + 0x95, 0x01, /* Report Count (1), */ + 0x81, 0x02, /* Input (Variable), */ + 0x95, 0x01, /* Report Count (1), */ + 0x81, 0x03, /* Input (Constant, Variable), */ + 0x75, 0x10, /* Report Size (16), */ + 0x95, 0x01, /* Report Count (1), */ + 0xA4, /* Push, */ + 0x05, 0x01, /* Usage Page (Desktop), */ + 0x65, 0x13, /* Unit (Inch), */ + 0x55, 0xFD, /* Unit Exponent (-3), */ + 0x34, /* Physical Minimum (0), */ + 0x09, 0x30, /* Usage (X), */ + 0x27, UCLOGIC_PH(X_LM), /* Logical Maximum (PLACEHOLDER), */ + 0x47, UCLOGIC_PH(X_PM), /* Physical Maximum (PLACEHOLDER), */ + 0x81, 0x02, /* Input (Variable), */ + 0x09, 0x31, /* Usage (Y), */ + 0x27, UCLOGIC_PH(Y_LM), /* Logical Maximum (PLACEHOLDER), */ + 0x47, UCLOGIC_PH(Y_PM), /* Physical Maximum (PLACEHOLDER), */ + 0x81, 0x02, /* Input (Variable), */ + 0xB4, /* Pop, */ + 0x09, 0x30, /* Usage (Tip Pressure), */ + 0x27, + UCLOGIC_PH(PRESSURE_LM),/* Logical Maximum (PLACEHOLDER), */ + 0x81, 0x02, /* Input (Variable), */ + 0xC0, /* End Collection, */ + 0xC0 /* End Collection */ +}; + +/* Parameter indices */ +enum uclogic_prm { + UCLOGIC_PRM_X_LM = 1, + UCLOGIC_PRM_Y_LM = 2, + UCLOGIC_PRM_PRESSURE_LM = 4, + UCLOGIC_PRM_RESOLUTION = 5, + UCLOGIC_PRM_NUM +}; + +/* Driver data */ +struct uclogic_drvdata { + __u8 *rdesc; + unsigned int rsize; + bool invert_pen_inrange; + bool ignore_pen_usage; +}; + static __u8 *uclogic_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; + struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); switch (hdev->product) { case USB_DEVICE_ID_UCLOGIC_TABLET_PF1209: @@ -621,11 +706,243 @@ break; } break; + default: + if (drvdata->rdesc != NULL) { + rdesc = drvdata->rdesc; + *rsize = drvdata->rsize; + } } return rdesc; } +static int uclogic_input_mapping(struct hid_device *hdev, struct hid_input *hi, + struct hid_field *field, struct hid_usage *usage, + unsigned long **bit, int *max) +{ + struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); + + /* discard the unused pen interface */ + if ((drvdata->ignore_pen_usage) && + (field->application == HID_DG_PEN)) + return -1; + + /* let hid-core decide what to do */ + return 0; +} + +static int uclogic_input_configured(struct hid_device *hdev, + struct hid_input *hi) +{ + char *name; + const char *suffix = NULL; + struct hid_field *field; + size_t len; + + /* no report associated (HID_QUIRK_MULTI_INPUT not set) */ + if (!hi->report) + return 0; + + field = hi->report->field[0]; + + switch (field->application) { + case HID_GD_KEYBOARD: + suffix = "Keyboard"; + break; + case HID_GD_MOUSE: + suffix = "Mouse"; + break; + case HID_GD_KEYPAD: + suffix = "Pad"; + break; + case HID_DG_PEN: + suffix = "Pen"; + break; + case HID_CP_CONSUMER_CONTROL: + suffix = "Consumer Control"; + break; + case HID_GD_SYSTEM_CONTROL: + suffix = "System Control"; + break; + } + + if (suffix) { + len = strlen(hdev->name) + 2 + strlen(suffix); + name = devm_kzalloc(&hi->input->dev, len, GFP_KERNEL); + if (name) { + snprintf(name, len, "%s %s", hdev->name, suffix); + hi->input->name = name; + } + } + + return 0; +} + +/** + * Enable fully-functional tablet mode and determine device parameters. + * + * @hdev: HID device + */ +static int uclogic_tablet_enable(struct hid_device *hdev) +{ + int rc; + struct usb_device *usb_dev = hid_to_usb_dev(hdev); + struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); + __le16 *buf = NULL; + size_t len; + s32 params[UCLOGIC_PH_ID_NUM]; + s32 resolution; + __u8 *p; + s32 v; + + /* + * Read string descriptor containing tablet parameters. The specific + * string descriptor and data were discovered by sniffing the Windows + * driver traffic. + * NOTE: This enables fully-functional tablet mode. + */ + len = UCLOGIC_PRM_NUM * sizeof(*buf); + buf = kmalloc(len, GFP_KERNEL); + if (buf == NULL) { + hid_err(hdev, "failed to allocate parameter buffer\n"); + rc = -ENOMEM; + goto cleanup; + } + rc = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), + USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, + (USB_DT_STRING << 8) + 0x64, + 0x0409, buf, len, + USB_CTRL_GET_TIMEOUT); + if (rc == -EPIPE) { + hid_err(hdev, "device parameters not found\n"); + rc = -ENODEV; + goto cleanup; + } else if (rc < 0) { + hid_err(hdev, "failed to get device parameters: %d\n", rc); + rc = -ENODEV; + goto cleanup; + } else if (rc != len) { + hid_err(hdev, "invalid device parameters\n"); + rc = -ENODEV; + goto cleanup; + } + + /* Extract device parameters */ + params[UCLOGIC_PH_ID_X_LM] = le16_to_cpu(buf[UCLOGIC_PRM_X_LM]); + params[UCLOGIC_PH_ID_Y_LM] = le16_to_cpu(buf[UCLOGIC_PRM_Y_LM]); + params[UCLOGIC_PH_ID_PRESSURE_LM] = + le16_to_cpu(buf[UCLOGIC_PRM_PRESSURE_LM]); + resolution = le16_to_cpu(buf[UCLOGIC_PRM_RESOLUTION]); + if (resolution == 0) { + params[UCLOGIC_PH_ID_X_PM] = 0; + params[UCLOGIC_PH_ID_Y_PM] = 0; + } else { + params[UCLOGIC_PH_ID_X_PM] = params[UCLOGIC_PH_ID_X_LM] * + 1000 / resolution; + params[UCLOGIC_PH_ID_Y_PM] = params[UCLOGIC_PH_ID_Y_LM] * + 1000 / resolution; + } + + /* Allocate fixed report descriptor */ + drvdata->rdesc = devm_kzalloc(&hdev->dev, + sizeof(uclogic_tablet_rdesc_template), + GFP_KERNEL); + if (drvdata->rdesc == NULL) { + hid_err(hdev, "failed to allocate fixed rdesc\n"); + rc = -ENOMEM; + goto cleanup; + } + drvdata->rsize = sizeof(uclogic_tablet_rdesc_template); + + /* Format fixed report descriptor */ + memcpy(drvdata->rdesc, uclogic_tablet_rdesc_template, + drvdata->rsize); + for (p = drvdata->rdesc; + p <= drvdata->rdesc + drvdata->rsize - 4;) { + if (p[0] == 0xFE && p[1] == 0xED && p[2] == 0x1D && + p[3] < ARRAY_SIZE(params)) { + v = params[p[3]]; + put_unaligned(cpu_to_le32(v), (s32 *)p); + p += 4; + } else { + p++; + } + } + + rc = 0; + +cleanup: + kfree(buf); + return rc; +} + +static int uclogic_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + int rc; + struct usb_interface *intf = to_usb_interface(hdev->dev.parent); + struct uclogic_drvdata *drvdata; + + /* + * libinput requires the pad interface to be on a different node + * than the pen, so use QUIRK_MULTI_INPUT for all tablets. + */ + hdev->quirks |= HID_QUIRK_MULTI_INPUT; + hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT; + + /* Allocate and assign driver data */ + drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (drvdata == NULL) + return -ENOMEM; + + hid_set_drvdata(hdev, drvdata); + + switch (id->product) { + case USB_DEVICE_ID_HUION_TABLET: + /* If this is the pen interface */ + if (intf->cur_altsetting->desc.bInterfaceNumber == 0) { + rc = uclogic_tablet_enable(hdev); + if (rc) { + hid_err(hdev, "tablet enabling failed\n"); + return rc; + } + drvdata->invert_pen_inrange = true; + } else { + drvdata->ignore_pen_usage = true; + } + break; + } + + 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 int uclogic_raw_event(struct hid_device *hdev, struct hid_report *report, + u8 *data, int size) +{ + struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); + + if ((drvdata->invert_pen_inrange) && + (report->type == HID_INPUT_REPORT) && + (report->id == UCLOGIC_PEN_REPORT_ID) && + (size >= 2)) + /* Invert the in-range bit */ + data[1] ^= 0x40; + + return 0; +} + static const struct hid_device_id uclogic_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_PF1209) }, @@ -641,6 +958,8 @@ USB_DEVICE_ID_UCLOGIC_WIRELESS_TABLET_TWHL850) }, { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_UCLOGIC_TABLET_TWHA60) }, + { HID_USB_DEVICE(USB_VENDOR_ID_HUION, USB_DEVICE_ID_HUION_TABLET) }, + { HID_USB_DEVICE(USB_VENDOR_ID_UCLOGIC, USB_DEVICE_ID_HUION_TABLET) }, { } }; MODULE_DEVICE_TABLE(hid, uclogic_devices); @@ -648,8 +967,14 @@ static struct hid_driver uclogic_driver = { .name = "uclogic", .id_table = uclogic_devices, + .probe = uclogic_probe, .report_fixup = uclogic_report_fixup, + .raw_event = uclogic_raw_event, + .input_mapping = uclogic_input_mapping, + .input_configured = uclogic_input_configured, }; module_hid_driver(uclogic_driver); +MODULE_AUTHOR("Martin Rusko"); +MODULE_AUTHOR("Nikolai Kondrashov"); MODULE_LICENSE("GPL");