/* * drivers/input/tablet/wacom_sys.c * * USB Wacom tablet support - system specific code */ /* * 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 "wacom_wac.h" #include "wacom.h" /* defines to get HID report descriptor */ #define HID_DEVICET_HID (USB_TYPE_CLASS | 0x01) #define HID_DEVICET_REPORT (USB_TYPE_CLASS | 0x02) #define HID_USAGE_UNDEFINED 0x00 #define HID_USAGE_PAGE 0x05 #define HID_USAGE_PAGE_DIGITIZER 0x0d #define HID_USAGE_PAGE_DESKTOP 0x01 #define HID_USAGE 0x09 #define HID_USAGE_X 0x30 #define HID_USAGE_Y 0x31 #define HID_USAGE_X_TILT 0x3d #define HID_USAGE_Y_TILT 0x3e #define HID_USAGE_FINGER 0x22 #define HID_USAGE_STYLUS 0x20 #define HID_COLLECTION 0xc0 enum { WCM_UNDEFINED = 0, WCM_DESKTOP, WCM_DIGITIZER, }; struct hid_descriptor { struct usb_descriptor_header header; __le16 bcdHID; u8 bCountryCode; u8 bNumDescriptors; u8 bDescriptorType; __le16 wDescriptorLength; } __attribute__ ((packed)); /* defines to get/set USB message */ #define USB_REQ_GET_REPORT 0x01 #define USB_REQ_SET_REPORT 0x09 #define WAC_HID_FEATURE_REPORT 0x03 #define WAC_MSG_RETRIES 5 #define WAC_CMD_LED_CONTROL 0x20 #define WAC_CMD_ICON_START 0x21 #define WAC_CMD_ICON_XFER 0x23 #define WAC_CMD_RETRIES 10 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id, void *buf, size_t size, unsigned int retries) { struct usb_device *dev = interface_to_usbdev(intf); int retval; do { retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber, buf, size, 100); } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries); return retval; } static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id, void *buf, size_t size, unsigned int retries) { struct usb_device *dev = interface_to_usbdev(intf); int retval; do { retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber, buf, size, 1000); } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries); return retval; } static void wacom_sys_irq(struct urb *urb) { struct wacom *wacom = urb->context; int retval; switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __func__, urb->status); return; default: dbg("%s - nonzero urb status received: %d", __func__, urb->status); goto exit; } wacom_wac_irq(&wacom->wacom_wac, urb->actual_length); exit: usb_mark_last_busy(wacom->usbdev); retval = usb_submit_urb(urb, GFP_ATOMIC); if (retval) err ("%s - usb_submit_urb failed with result %d", __func__, retval); } static int wacom_open(struct input_dev *dev) { struct wacom *wacom = input_get_drvdata(dev); int retval = 0; if (usb_autopm_get_interface(wacom->intf) < 0) return -EIO; mutex_lock(&wacom->lock); if (usb_submit_urb(wacom->irq, GFP_KERNEL)) { retval = -EIO; goto out; } wacom->open = true; wacom->intf->needs_remote_wakeup = 1; out: mutex_unlock(&wacom->lock); usb_autopm_put_interface(wacom->intf); return retval; } static void wacom_close(struct input_dev *dev) { struct wacom *wacom = input_get_drvdata(dev); int autopm_error; autopm_error = usb_autopm_get_interface(wacom->intf); mutex_lock(&wacom->lock); usb_kill_urb(wacom->irq); wacom->open = false; wacom->intf->needs_remote_wakeup = 0; mutex_unlock(&wacom->lock); if (!autopm_error) usb_autopm_put_interface(wacom->intf); } static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc, struct wacom_features *features) { struct usb_device *dev = interface_to_usbdev(intf); char limit = 0; /* result has to be defined as int for some devices */ int result = 0; int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0; unsigned char *report; report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL); if (!report) return -ENOMEM; /* retrive report descriptors */ do { result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, HID_DEVICET_REPORT << 8, intf->altsetting[0].desc.bInterfaceNumber, /* interface */ report, hid_desc->wDescriptorLength, 5000); /* 5 secs */ } while (result < 0 && limit++ < WAC_MSG_RETRIES); /* No need to parse the Descriptor. It isn't an error though */ if (result < 0) goto out; for (i = 0; i < hid_desc->wDescriptorLength; i++) { switch (report[i]) { case HID_USAGE_PAGE: switch (report[i + 1]) { case HID_USAGE_PAGE_DIGITIZER: usage = WCM_DIGITIZER; i++; break; case HID_USAGE_PAGE_DESKTOP: usage = WCM_DESKTOP; i++; break; } break; case HID_USAGE: switch (report[i + 1]) { case HID_USAGE_X: if (usage == WCM_DESKTOP) { if (finger) { features->device_type = BTN_TOOL_FINGER; if (features->type == TABLETPC2FG) { /* need to reset back */ features->pktlen = WACOM_PKGLEN_TPC2FG; features->device_type = BTN_TOOL_DOUBLETAP; } if (features->type == BAMBOO_PT) { /* need to reset back */ features->pktlen = WACOM_PKGLEN_BBTOUCH; features->device_type = BTN_TOOL_DOUBLETAP; features->x_phy = get_unaligned_le16(&report[i + 5]); features->x_max = get_unaligned_le16(&report[i + 8]); i += 15; } else { features->x_max = get_unaligned_le16(&report[i + 3]); features->x_phy = get_unaligned_le16(&report[i + 6]); features->unit = report[i + 9]; features->unitExpo = report[i + 11]; i += 12; } } else if (pen) { /* penabled only accepts exact bytes of data */ if (features->type == TABLETPC2FG) features->pktlen = WACOM_PKGLEN_GRAPHIRE; if (features->type == BAMBOO_PT) features->pktlen = WACOM_PKGLEN_BBFUN; features->device_type = BTN_TOOL_PEN; features->x_max = get_unaligned_le16(&report[i + 3]); i += 4; } } break; case HID_USAGE_Y: if (usage == WCM_DESKTOP) { if (finger) { features->device_type = BTN_TOOL_FINGER; if (features->type == TABLETPC2FG) { /* need to reset back */ features->pktlen = WACOM_PKGLEN_TPC2FG; features->device_type = BTN_TOOL_DOUBLETAP; features->y_max = get_unaligned_le16(&report[i + 3]); features->y_phy = get_unaligned_le16(&report[i + 6]); i += 7; } else if (features->type == BAMBOO_PT) { /* need to reset back */ features->pktlen = WACOM_PKGLEN_BBTOUCH; features->device_type = BTN_TOOL_DOUBLETAP; features->y_phy = get_unaligned_le16(&report[i + 3]); features->y_max = get_unaligned_le16(&report[i + 6]); i += 12; } else { features->y_max = features->x_max; features->y_phy = get_unaligned_le16(&report[i + 3]); i += 4; } } else if (pen) { /* penabled only accepts exact bytes of data */ if (features->type == TABLETPC2FG) features->pktlen = WACOM_PKGLEN_GRAPHIRE; if (features->type == BAMBOO_PT) features->pktlen = WACOM_PKGLEN_BBFUN; features->device_type = BTN_TOOL_PEN; features->y_max = get_unaligned_le16(&report[i + 3]); i += 4; } } break; case HID_USAGE_FINGER: finger = 1; i++; break; case HID_USAGE_STYLUS: pen = 1; i++; break; } break; case HID_COLLECTION: /* reset UsagePage and Finger */ finger = usage = 0; break; } } out: result = 0; kfree(report); return result; } static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features) { unsigned char *rep_data; int limit = 0, report_id = 2; int error = -ENOMEM; rep_data = kmalloc(4, GFP_KERNEL); if (!rep_data) return error; /* ask to report tablet data if it is MT Tablet PC or * not a Tablet PC */ if (features->type == TABLETPC2FG) { do { rep_data[0] = 3; rep_data[1] = 4; rep_data[2] = 0; rep_data[3] = 0; report_id = 3; error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, report_id, rep_data, 4, 1); if (error >= 0) error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT, report_id, rep_data, 4, 1); } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES); } else if (features->type != TABLETPC) { do { rep_data[0] = 2; rep_data[1] = 2; error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, report_id, rep_data, 2, 1); if (error >= 0) error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT, report_id, rep_data, 2, 1); } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES); } kfree(rep_data); return error < 0 ? error : 0; } static int wacom_retrieve_hid_descriptor(struct usb_interface *intf, struct wacom_features *features) { int error = 0; struct usb_host_interface *interface = intf->cur_altsetting; struct hid_descriptor *hid_desc; /* default features */ features->device_type = BTN_TOOL_PEN; features->x_fuzz = 4; features->y_fuzz = 4; features->pressure_fuzz = 0; features->distance_fuzz = 0; /* only Tablet PCs and Bamboo P&T need to retrieve the info */ if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) && (features->type != BAMBOO_PT)) goto out; if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) { if (usb_get_extra_descriptor(&interface->endpoint[0], HID_DEVICET_REPORT, &hid_desc)) { printk("wacom: can not retrieve extra class descriptor\n"); error = 1; goto out; } } error = wacom_parse_hid(intf, hid_desc, features); if (error) goto out; out: return error; } struct wacom_usbdev_data { struct list_head list; struct kref kref; struct usb_device *dev; struct wacom_shared shared; }; static LIST_HEAD(wacom_udev_list); static DEFINE_MUTEX(wacom_udev_list_lock); static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev) { struct wacom_usbdev_data *data; list_for_each_entry(data, &wacom_udev_list, list) { if (data->dev == dev) { kref_get(&data->kref); return data; } } return NULL; } static int wacom_add_shared_data(struct wacom_wac *wacom, struct usb_device *dev) { struct wacom_usbdev_data *data; int retval = 0; mutex_lock(&wacom_udev_list_lock); data = wacom_get_usbdev_data(dev); if (!data) { data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL); if (!data) { retval = -ENOMEM; goto out; } kref_init(&data->kref); data->dev = dev; list_add_tail(&data->list, &wacom_udev_list); } wacom->shared = &data->shared; out: mutex_unlock(&wacom_udev_list_lock); return retval; } static void wacom_release_shared_data(struct kref *kref) { struct wacom_usbdev_data *data = container_of(kref, struct wacom_usbdev_data, kref); mutex_lock(&wacom_udev_list_lock); list_del(&data->list); mutex_unlock(&wacom_udev_list_lock); kfree(data); } static void wacom_remove_shared_data(struct wacom_wac *wacom) { struct wacom_usbdev_data *data; if (wacom->shared) { data = container_of(wacom->shared, struct wacom_usbdev_data, shared); kref_put(&data->kref, wacom_release_shared_data); wacom->shared = NULL; } } static int wacom_led_control(struct wacom *wacom) { unsigned char *buf; int retval, led = 0; buf = kzalloc(9, GFP_KERNEL); if (!buf) return -ENOMEM; if (wacom->wacom_wac.features.type == WACOM_21UX2) led = (wacom->led.select[1] << 4) | 0x40; led |= wacom->led.select[0] | 0x4; buf[0] = WAC_CMD_LED_CONTROL; buf[1] = led; buf[2] = wacom->led.llv; buf[3] = wacom->led.hlv; buf[4] = wacom->led.img_lum; retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL, buf, 9, WAC_CMD_RETRIES); kfree(buf); return retval; } static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img) { unsigned char *buf; int i, retval; buf = kzalloc(259, GFP_KERNEL); if (!buf) return -ENOMEM; /* Send 'start' command */ buf[0] = WAC_CMD_ICON_START; buf[1] = 1; retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START, buf, 2, WAC_CMD_RETRIES); if (retval < 0) goto out; buf[0] = WAC_CMD_ICON_XFER; buf[1] = button_id & 0x07; for (i = 0; i < 4; i++) { buf[2] = i; memcpy(buf + 3, img + i * 256, 256); retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER, buf, 259, WAC_CMD_RETRIES); if (retval < 0) break; } /* Send 'stop' */ buf[0] = WAC_CMD_ICON_START; buf[1] = 0; wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START, buf, 2, WAC_CMD_RETRIES); out: kfree(buf); return retval; } static ssize_t wacom_led_select_store(struct device *dev, int set_id, const char *buf, size_t count) { struct wacom *wacom = dev_get_drvdata(dev); unsigned int id; int err; err = kstrtouint(buf, 10, &id); if (err) return err; mutex_lock(&wacom->lock); wacom->led.select[set_id] = id & 0x3; err = wacom_led_control(wacom); mutex_unlock(&wacom->lock); return err < 0 ? err : count; } #define DEVICE_LED_SELECT_ATTR(SET_ID) \ static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \ struct device_attribute *attr, const char *buf, size_t count) \ { \ return wacom_led_select_store(dev, SET_ID, buf, count); \ } \ static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct wacom *wacom = dev_get_drvdata(dev); \ return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \ } \ static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \ wacom_led##SET_ID##_select_show, \ wacom_led##SET_ID##_select_store) DEVICE_LED_SELECT_ATTR(0); DEVICE_LED_SELECT_ATTR(1); static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest, const char *buf, size_t count) { unsigned int value; int err; err = kstrtouint(buf, 10, &value); if (err) return err; mutex_lock(&wacom->lock); *dest = value & 0x7f; err = wacom_led_control(wacom); mutex_unlock(&wacom->lock); return err < 0 ? err : count; } #define DEVICE_LUMINANCE_ATTR(name, field) \ static ssize_t wacom_##name##_luminance_store(struct device *dev, \ struct device_attribute *attr, const char *buf, size_t count) \ { \ struct wacom *wacom = dev_get_drvdata(dev); \ \ return wacom_luminance_store(wacom, &wacom->led.field, \ buf, count); \ } \ static DEVICE_ATTR(name##_luminance, S_IWUSR, \ NULL, wacom_##name##_luminance_store) DEVICE_LUMINANCE_ATTR(status0, llv); DEVICE_LUMINANCE_ATTR(status1, hlv); DEVICE_LUMINANCE_ATTR(buttons, img_lum); static ssize_t wacom_button_image_store(struct device *dev, int button_id, const char *buf, size_t count) { struct wacom *wacom = dev_get_drvdata(dev); int err; if (count != 1024) return -EINVAL; mutex_lock(&wacom->lock); err = wacom_led_putimage(wacom, button_id, buf); mutex_unlock(&wacom->lock); return err < 0 ? err : count; } #define DEVICE_BTNIMG_ATTR(BUTTON_ID) \ static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \ struct device_attribute *attr, const char *buf, size_t count) \ { \ return wacom_button_image_store(dev, BUTTON_ID, buf, count); \ } \ static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \ NULL, wacom_btnimg##BUTTON_ID##_store) DEVICE_BTNIMG_ATTR(0); DEVICE_BTNIMG_ATTR(1); DEVICE_BTNIMG_ATTR(2); DEVICE_BTNIMG_ATTR(3); DEVICE_BTNIMG_ATTR(4); DEVICE_BTNIMG_ATTR(5); DEVICE_BTNIMG_ATTR(6); DEVICE_BTNIMG_ATTR(7); static struct attribute *cintiq_led_attrs[] = { &dev_attr_status_led0_select.attr, &dev_attr_status_led1_select.attr, NULL }; static struct attribute_group cintiq_led_attr_group = { .name = "wacom_led", .attrs = cintiq_led_attrs, }; static struct attribute *intuos4_led_attrs[] = { &dev_attr_status0_luminance.attr, &dev_attr_status1_luminance.attr, &dev_attr_status_led0_select.attr, &dev_attr_buttons_luminance.attr, &dev_attr_button0_rawimg.attr, &dev_attr_button1_rawimg.attr, &dev_attr_button2_rawimg.attr, &dev_attr_button3_rawimg.attr, &dev_attr_button4_rawimg.attr, &dev_attr_button5_rawimg.attr, &dev_attr_button6_rawimg.attr, &dev_attr_button7_rawimg.attr, NULL }; static struct attribute_group intuos4_led_attr_group = { .name = "wacom_led", .attrs = intuos4_led_attrs, }; static int wacom_initialize_leds(struct wacom *wacom) { int error; /* Initialize default values */ switch (wacom->wacom_wac.features.type) { case INTUOS4: case INTUOS4L: wacom->led.select[0] = 0; wacom->led.select[1] = 0; wacom->led.llv = 10; wacom->led.hlv = 20; wacom->led.img_lum = 10; error = sysfs_create_group(&wacom->intf->dev.kobj, &intuos4_led_attr_group); break; case WACOM_21UX2: wacom->led.select[0] = 0; wacom->led.select[1] = 0; wacom->led.llv = 0; wacom->led.hlv = 0; wacom->led.img_lum = 0; error = sysfs_create_group(&wacom->intf->dev.kobj, &cintiq_led_attr_group); break; default: return 0; } if (error) { dev_err(&wacom->intf->dev, "cannot create sysfs group err: %d\n", error); return error; } wacom_led_control(wacom); return 0; } static void wacom_destroy_leds(struct wacom *wacom) { switch (wacom->wacom_wac.features.type) { case INTUOS4: case INTUOS4L: sysfs_remove_group(&wacom->intf->dev.kobj, &intuos4_led_attr_group); break; case WACOM_21UX2: sysfs_remove_group(&wacom->intf->dev.kobj, &cintiq_led_attr_group); break; } } static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *dev = interface_to_usbdev(intf); struct usb_endpoint_descriptor *endpoint; struct wacom *wacom; struct wacom_wac *wacom_wac; struct wacom_features *features; struct input_dev *input_dev; int error; if (!id->driver_info) return -EINVAL; wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL); input_dev = input_allocate_device(); if (!wacom || !input_dev) { error = -ENOMEM; goto fail1; } wacom_wac = &wacom->wacom_wac; wacom_wac->features = *((struct wacom_features *)id->driver_info); features = &wacom_wac->features; if (features->pktlen > WACOM_PKGLEN_MAX) { error = -EINVAL; goto fail1; } wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX, GFP_KERNEL, &wacom->data_dma); if (!wacom_wac->data) { error = -ENOMEM; goto fail1; } wacom->irq = usb_alloc_urb(0, GFP_KERNEL); if (!wacom->irq) { error = -ENOMEM; goto fail2; } wacom->usbdev = dev; wacom->intf = intf; mutex_init(&wacom->lock); usb_make_path(dev, wacom->phys, sizeof(wacom->phys)); strlcat(wacom->phys, "/input0", sizeof(wacom->phys)); wacom_wac->input = input_dev; endpoint = &intf->cur_altsetting->endpoint[0].desc; /* Retrieve the physical and logical size for OEM devices */ error = wacom_retrieve_hid_descriptor(intf, features); if (error) goto fail3; wacom_setup_device_quirks(features); strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name)); if (features->quirks & WACOM_QUIRK_MULTI_INPUT) { /* Append the device type to the name */ strlcat(wacom_wac->name, features->device_type == BTN_TOOL_PEN ? " Pen" : " Finger", sizeof(wacom_wac->name)); error = wacom_add_shared_data(wacom_wac, dev); if (error) goto fail3; } input_dev->name = wacom_wac->name; input_dev->dev.parent = &intf->dev; input_dev->open = wacom_open; input_dev->close = wacom_close; usb_to_input_id(dev, &input_dev->id); input_set_drvdata(input_dev, wacom); wacom_setup_input_capabilities(input_dev, wacom_wac); usb_fill_int_urb(wacom->irq, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress), wacom_wac->data, features->pktlen, wacom_sys_irq, wacom, endpoint->bInterval); wacom->irq->transfer_dma = wacom->data_dma; wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; error = wacom_initialize_leds(wacom); if (error) goto fail4; error = input_register_device(input_dev); if (error) goto fail5; /* Note that if query fails it is not a hard failure */ wacom_query_tablet_data(intf, features); usb_set_intfdata(intf, wacom); return 0; fail5: wacom_destroy_leds(wacom); fail4: wacom_remove_shared_data(wacom_wac); fail3: usb_free_urb(wacom->irq); fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma); fail1: input_free_device(input_dev); kfree(wacom); return error; } static void wacom_disconnect(struct usb_interface *intf) { struct wacom *wacom = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); usb_kill_urb(wacom->irq); input_unregister_device(wacom->wacom_wac.input); wacom_destroy_leds(wacom); usb_free_urb(wacom->irq); usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX, wacom->wacom_wac.data, wacom->data_dma); wacom_remove_shared_data(&wacom->wacom_wac); kfree(wacom); } static int wacom_suspend(struct usb_interface *intf, pm_message_t message) { struct wacom *wacom = usb_get_intfdata(intf); mutex_lock(&wacom->lock); usb_kill_urb(wacom->irq); mutex_unlock(&wacom->lock); return 0; } static int wacom_resume(struct usb_interface *intf) { struct wacom *wacom = usb_get_intfdata(intf); struct wacom_features *features = &wacom->wacom_wac.features; int rv = 0; mutex_lock(&wacom->lock); /* switch to wacom mode first */ wacom_query_tablet_data(intf, features); wacom_led_control(wacom); if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0) rv = -EIO; mutex_unlock(&wacom->lock); return rv; } static int wacom_reset_resume(struct usb_interface *intf) { return wacom_resume(intf); } static struct usb_driver wacom_driver = { .name = "wacom", .id_table = wacom_ids, .probe = wacom_probe, .disconnect = wacom_disconnect, .suspend = wacom_suspend, .resume = wacom_resume, .reset_resume = wacom_reset_resume, .supports_autosuspend = 1, }; module_usb_driver(wacom_driver);