diff options
Diffstat (limited to 'drivers/hid/hid-huion.c')
| -rw-r--r-- | drivers/hid/hid-huion.c | 265 |
1 files changed, 175 insertions, 90 deletions
diff --git a/drivers/hid/hid-huion.c b/drivers/hid/hid-huion.c index cbf4da4689ba..60f44cd1b0ed 100644 --- a/drivers/hid/hid-huion.c +++ b/drivers/hid/hid-huion.c @@ -2,6 +2,7 @@ * HID driver for Huion devices not fully compliant with HID standard * * Copyright (c) 2013 Martin Rusko + * Copyright (c) 2014 Nikolai Kondrashov */ /* @@ -15,67 +16,89 @@ #include <linux/hid.h> #include <linux/module.h> #include <linux/usb.h> +#include <asm/unaligned.h> #include "usbhid/usbhid.h" #include "hid-ids.h" -/* Original Huion 580 report descriptor size */ -#define HUION_580_RDESC_ORIG_SIZE 177 - -/* Fixed Huion 580 report descriptor */ -static __u8 huion_580_rdesc_fixed[] = { - 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), */ - 0x46, 0x40, 0x1F, /* Physical Maximum (8000), */ - 0x26, 0x00, 0x7D, /* Logical Maximum (32000), */ - 0x81, 0x02, /* Input (Variable), */ - 0x09, 0x31, /* Usage (Y), */ - 0x46, 0x88, 0x13, /* Physical Maximum (5000), */ - 0x26, 0x20, 0x4E, /* Logical Maximum (20000), */ - 0x81, 0x02, /* Input (Variable), */ - 0xB4, /* Pop, */ - 0x09, 0x30, /* Usage (Tip Pressure), */ - 0x26, 0xFF, 0x07, /* Logical Maximum (2047), */ - 0x81, 0x02, /* Input (Variable), */ - 0xC0, /* End Collection, */ - 0xC0 /* End Collection */ +/* Report descriptor template placeholder head */ +#define HUION_PH_HEAD 0xFE, 0xED, 0x1D + +/* Report descriptor template placeholder IDs */ +enum huion_ph_id { + HUION_PH_ID_X_LM, + HUION_PH_ID_X_PM, + HUION_PH_ID_Y_LM, + HUION_PH_ID_Y_PM, + HUION_PH_ID_PRESSURE_LM, + HUION_PH_ID_NUM +}; + +/* Report descriptor template placeholder */ +#define HUION_PH(_ID) HUION_PH_HEAD, HUION_PH_ID_##_ID + +/* Fixed report descriptor template */ +static const __u8 huion_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, HUION_PH(X_LM), /* Logical Maximum (PLACEHOLDER), */ + 0x47, HUION_PH(X_PM), /* Physical Maximum (PLACEHOLDER), */ + 0x81, 0x02, /* Input (Variable), */ + 0x09, 0x31, /* Usage (Y), */ + 0x27, HUION_PH(Y_LM), /* Logical Maximum (PLACEHOLDER), */ + 0x47, HUION_PH(Y_PM), /* Physical Maximum (PLACEHOLDER), */ + 0x81, 0x02, /* Input (Variable), */ + 0xB4, /* Pop, */ + 0x09, 0x30, /* Usage (Tip Pressure), */ + 0x27, + HUION_PH(PRESSURE_LM), /* Logical Maximum (PLACEHOLDER), */ + 0x81, 0x02, /* Input (Variable), */ + 0xC0, /* End Collection, */ + 0xC0 /* End Collection */ +}; + +/* Driver data */ +struct huion_drvdata { + __u8 *rdesc; + unsigned int rsize; }; static __u8 *huion_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { + struct huion_drvdata *drvdata = hid_get_drvdata(hdev); switch (hdev->product) { - case USB_DEVICE_ID_HUION_580: - if (*rsize == HUION_580_RDESC_ORIG_SIZE) { - rdesc = huion_580_rdesc_fixed; - *rsize = sizeof(huion_580_rdesc_fixed); + case USB_DEVICE_ID_HUION_TABLET: + if (drvdata->rdesc != NULL) { + rdesc = drvdata->rdesc; + *rsize = drvdata->rsize; } break; } @@ -83,82 +106,144 @@ static __u8 *huion_report_fixup(struct hid_device *hdev, __u8 *rdesc, } /** - * Enable fully-functional tablet mode by reading special string - * descriptor. + * Enable fully-functional tablet mode and determine device parameters. * * @hdev: HID device - * - * The specific string descriptor and data were discovered by sniffing - * the Windows driver traffic. */ static int huion_tablet_enable(struct hid_device *hdev) { int rc; - char buf[22]; + struct usb_device *usb_dev = hid_to_usb_dev(hdev); + struct huion_drvdata *drvdata = hid_get_drvdata(hdev); + __le16 buf[6]; - rc = usb_string(hid_to_usb_dev(hdev), 0x64, buf, sizeof(buf)); - if (rc < 0) - return rc; + /* + * 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. + */ + 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, sizeof(buf), + USB_CTRL_GET_TIMEOUT); + if (rc == -EPIPE) + hid_warn(hdev, "device parameters not found\n"); + else if (rc < 0) + hid_warn(hdev, "failed to get device parameters: %d\n", rc); + else if (rc != sizeof(buf)) + hid_warn(hdev, "invalid device parameters\n"); + else { + s32 params[HUION_PH_ID_NUM]; + s32 resolution; + __u8 *p; + s32 v; + + /* Extract device parameters */ + params[HUION_PH_ID_X_LM] = le16_to_cpu(buf[1]); + params[HUION_PH_ID_Y_LM] = le16_to_cpu(buf[2]); + params[HUION_PH_ID_PRESSURE_LM] = le16_to_cpu(buf[4]); + resolution = le16_to_cpu(buf[5]); + if (resolution == 0) { + params[HUION_PH_ID_X_PM] = 0; + params[HUION_PH_ID_Y_PM] = 0; + } else { + params[HUION_PH_ID_X_PM] = params[HUION_PH_ID_X_LM] * + 1000 / resolution; + params[HUION_PH_ID_Y_PM] = params[HUION_PH_ID_Y_LM] * + 1000 / resolution; + } + + /* Allocate fixed report descriptor */ + drvdata->rdesc = devm_kmalloc(&hdev->dev, + sizeof(huion_tablet_rdesc_template), + GFP_KERNEL); + if (drvdata->rdesc == NULL) { + hid_err(hdev, "failed to allocate fixed rdesc\n"); + return -ENOMEM; + } + drvdata->rsize = sizeof(huion_tablet_rdesc_template); + + /* Format fixed report descriptor */ + memcpy(drvdata->rdesc, huion_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] < sizeof(params)) { + v = params[p[3]]; + put_unaligned(cpu_to_le32(v), (s32 *)p); + p += 4; + } else { + p++; + } + } + } return 0; } static int huion_probe(struct hid_device *hdev, const struct hid_device_id *id) { - int ret; + int rc; struct usb_interface *intf = to_usb_interface(hdev->dev.parent); + struct huion_drvdata *drvdata; + + /* Allocate and assign driver data */ + drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (drvdata == NULL) { + hid_err(hdev, "failed to allocate driver data\n"); + return -ENOMEM; + } + hid_set_drvdata(hdev, drvdata); - /* Ignore interfaces 1 (mouse) and 2 (keyboard) for Huion 580 tablet, - * as they are not used - */ switch (id->product) { - case USB_DEVICE_ID_HUION_580: - if (intf->cur_altsetting->desc.bInterfaceNumber != 0x00) - return -ENODEV; + case USB_DEVICE_ID_HUION_TABLET: + /* If this is the pen interface */ + if (intf->cur_altsetting->desc.bInterfaceNumber == 0) { + rc = huion_tablet_enable(hdev); + if (rc) { + hid_err(hdev, "tablet enabling failed\n"); + return rc; + } + } break; } - ret = hid_parse(hdev); - if (ret) { + rc = hid_parse(hdev); + if (rc) { hid_err(hdev, "parse failed\n"); - goto err; + return rc; } - ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); - if (ret) { + rc = hid_hw_start(hdev, HID_CONNECT_DEFAULT); + if (rc) { hid_err(hdev, "hw start failed\n"); - goto err; - } - - switch (id->product) { - case USB_DEVICE_ID_HUION_580: - ret = huion_tablet_enable(hdev); - if (ret) { - hid_err(hdev, "tablet enabling failed\n"); - goto enabling_err; - } - break; + return rc; } return 0; -enabling_err: - hid_hw_stop(hdev); -err: - return ret; } static int huion_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) { - /* If this is a pen input report then invert the in-range bit */ - if (report->type == HID_INPUT_REPORT && report->id == 0x07 && size >= 2) + struct usb_interface *intf = to_usb_interface(hdev->dev.parent); + + /* If this is a pen input report */ + if (intf->cur_altsetting->desc.bInterfaceNumber == 0 && + report->type == HID_INPUT_REPORT && + report->id == 0x07 && size >= 2) + /* Invert the in-range bit */ data[1] ^= 0x40; return 0; } static const struct hid_device_id huion_devices[] = { - { HID_USB_DEVICE(USB_VENDOR_ID_HUION, USB_DEVICE_ID_HUION_580) }, + { 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, huion_devices); |