/* * 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_USAGE_CONTACTMAX 0x55 #define HID_COLLECTION 0xa1 #define HID_COLLECTION_LOGICAL 0x02 #define HID_COLLECTION_END 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_DIR_IN | 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; struct device *dev = &wacom->intf->dev; int retval; switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, urb->status); return; default: dev_dbg(dev, "%s - nonzero urb status received: %d\n", __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) dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __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); } /* * Calculate the resolution of the X or Y axis, given appropriate HID data. * This function is little more than hidinput_calc_abs_res stripped down. */ static int wacom_calc_hid_res(int logical_extents, int physical_extents, unsigned char unit, unsigned char exponent) { int prev, unit_exponent; /* Check if the extents are sane */ if (logical_extents <= 0 || physical_extents <= 0) return 0; /* Get signed value of nybble-sized twos-compliment exponent */ unit_exponent = exponent; if (unit_exponent > 7) unit_exponent -= 16; /* Convert physical_extents to millimeters */ if (unit == 0x11) { /* If centimeters */ unit_exponent += 1; } else if (unit == 0x13) { /* If inches */ prev = physical_extents; physical_extents *= 254; if (physical_extents < prev) return 0; unit_exponent -= 1; } else { return 0; } /* Apply negative unit exponent */ for (; unit_exponent < 0; unit_exponent++) { prev = logical_extents; logical_extents *= 10; if (logical_extents < prev) return 0; } /* Apply positive unit exponent */ for (; unit_exponent > 0; unit_exponent--) { prev = physical_extents; physical_extents *= 10; if (physical_extents < prev) return 0; } /* Calculate resolution */ return logical_extents / physical_extents; } /* * The physical dimension specified by the HID descriptor is likely not in * the "100th of a mm" units expected by wacom_calculate_touch_res. This * function adjusts the value of [xy]_phy based on the unit and exponent * provided by the HID descriptor. If an error occurs durring conversion * (e.g. from the unit being left unspecified) [xy]_phy is not modified. */ static void wacom_fix_phy_from_hid(struct wacom_features *features) { int xres = wacom_calc_hid_res(features->x_max, features->x_phy, features->unit, features->unitExpo); int yres = wacom_calc_hid_res(features->y_max, features->y_phy, features->unit, features->unitExpo); if (xres > 0 && yres > 0) { features->x_phy = (100 * features->x_max) / xres; features->y_phy = (100 * features->y_max) / yres; } } /* * Static values for max X/Y and resolution of Pen interface is stored in * features. This mean physical size of active area can be computed. * This is useful to do when Pen and Touch have same active area of tablet. * This means for Touch device, we only need to find max X/Y value and we * have enough information to compute resolution of touch. */ static void wacom_set_phy_from_res(struct wacom_features *features) { features->x_phy = (features->x_max * 100) / features->x_resolution; features->y_phy = (features->y_max * 100) / features->y_resolution; } static int wacom_parse_logical_collection(unsigned char *report, struct wacom_features *features) { int length = 0; if (features->type == BAMBOO_PT) { /* Logical collection is only used by 3rd gen Bamboo Touch */ features->pktlen = WACOM_PKGLEN_BBTOUCH3; features->device_type = BTN_TOOL_FINGER; wacom_set_phy_from_res(features); features->x_max = features->y_max = get_unaligned_le16(&report[10]); length = 11; } return length; } static void wacom_retrieve_report_data(struct usb_interface *intf, struct wacom_features *features) { int result = 0; unsigned char *rep_data; rep_data = kmalloc(2, GFP_KERNEL); if (rep_data) { rep_data[0] = 12; result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT, rep_data[0], rep_data, 2, WAC_MSG_RETRIES); if (result >= 0 && rep_data[1] > 2) features->touch_max = rep_data[1]; kfree(rep_data); } } /* * Interface Descriptor of wacom devices can be incomplete and * inconsistent so wacom_features table is used to store stylus * device's packet lengths, various maximum values, and tablet * resolution based on product ID's. * * For devices that contain 2 interfaces, wacom_features table is * inaccurate for the touch interface. Since the Interface Descriptor * for touch interfaces has pretty complete data, this function exists * to query tablet for this missing information instead of hard coding in * an additional table. * * A typical Interface Descriptor for a stylus will contain a * boot mouse application collection that is not of interest and this * function will ignore it. * * It also contains a digitizer application collection that also is not * of interest since any information it contains would be duplicate * of what is in wacom_features. Usually it defines a report of an array * of bytes that could be used as max length of the stylus packet returned. * If it happens to define a Digitizer-Stylus Physical Collection then * the X and Y logical values contain valid data but it is ignored. * * A typical Interface Descriptor for a touch interface will contain a * Digitizer-Finger Physical Collection which will define both logical * X/Y maximum as well as the physical size of tablet. Since touch * interfaces haven't supported pressure or distance, this is enough * information to override invalid values in the wacom_features table. * * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical * Collection. Instead they define a Logical Collection with a single * Logical Maximum for both X and Y. * * Intuos5 touch interface does not contain useful data. We deal with * this after returning from this function. */ 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; } if (features->type == MTSCREEN) features->pktlen = WACOM_PKGLEN_MTOUCH; if (features->type == BAMBOO_PT) { /* need to reset back */ features->pktlen = WACOM_PKGLEN_BBTOUCH; 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; 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) { int type = features->type; if (type == TABLETPC2FG || type == MTSCREEN) { features->y_max = get_unaligned_le16(&report[i + 3]); features->y_phy = get_unaligned_le16(&report[i + 6]); i += 7; } else if (type == BAMBOO_PT) { 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) { features->y_max = get_unaligned_le16(&report[i + 3]); i += 4; } } break; case HID_USAGE_FINGER: finger = 1; i++; break; /* * Requiring Stylus Usage will ignore boot mouse * X/Y values and some cases of invalid Digitizer X/Y * values commonly reported. */ case HID_USAGE_STYLUS: pen = 1; i++; break; case HID_USAGE_CONTACTMAX: /* leave touch_max as is if predefined */ if (!features->touch_max) wacom_retrieve_report_data(intf, features); i++; break; } break; case HID_COLLECTION_END: /* reset UsagePage and Finger */ finger = usage = 0; break; case HID_COLLECTION: i++; switch (report[i]) { case HID_COLLECTION_LOGICAL: i += wacom_parse_logical_collection(&report[i], features); break; } break; } } out: result = 0; kfree(report); return result; } static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode) { unsigned char *rep_data; int error = -ENOMEM, limit = 0; rep_data = kzalloc(length, GFP_KERNEL); if (!rep_data) return error; rep_data[0] = report_id; rep_data[1] = mode; do { error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, report_id, rep_data, length, 1); if (error >= 0) error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT, report_id, rep_data, length, 1); } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES); kfree(rep_data); return error < 0 ? error : 0; } /* * Switch the tablet into its most-capable mode. Wacom tablets are * typically configured to power-up in a mode which sends mouse-like * reports to the OS. To get absolute position, pressure data, etc. * from the tablet, it is necessary to switch the tablet out of this * mode and into one which sends the full range of tablet data. */ static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features) { if (features->device_type == BTN_TOOL_FINGER) { if (features->type > TABLETPC) { /* MT Tablet PC touch */ return wacom_set_device_mode(intf, 3, 4, 4); } } else if (features->device_type == BTN_TOOL_PEN) { if (features->type <= BAMBOO_PT && features->type != WIRELESS) { return wacom_set_device_mode(intf, 2, 2, 2); } } return 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; /* * The wireless device HID is basic and layout conflicts with * other tablets (monitor and touch interface can look like pen). * Skip the query for this type and modify defaults based on * interface number. */ if (features->type == WIRELESS) { if (intf->cur_altsetting->desc.bInterfaceNumber == 0) { features->device_type = 0; } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) { features->device_type = BTN_TOOL_FINGER; features->pktlen = WACOM_PKGLEN_BBTOUCH3; } } /* only devices that support touch need to retrieve the info */ if (features->type < BAMBOO_PT) { goto out; } error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc); if (error) { error = usb_get_extra_descriptor(&interface->endpoint[0], HID_DEVICET_REPORT, &hid_desc); if (error) { dev_err(&intf->dev, "can not retrieve extra class descriptor\n"); goto out; } } error = wacom_parse_hid(intf, hid_desc, features); if (error) goto out; wacom_fix_phy_from_hid(features); 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; buf = kzalloc(9, GFP_KERNEL); if (!buf) return -ENOMEM; if (wacom->wacom_wac.features.type >= INTUOS5S && wacom->wacom_wac.features.type <= INTUOS5L) { /* * Touch Ring and crop mark LED luminance may take on * one of four values: * 0 = Low; 1 = Medium; 2 = High; 3 = Off */ int ring_led = wacom->led.select[0] & 0x03; int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03; int crop_lum = 0; buf[0] = WAC_CMD_LED_CONTROL; buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led); } else { int led = wacom->led.select[0] | 0x4; if (wacom->wacom_wac.features.type == WACOM_21UX2 || wacom->wacom_wac.features.type == WACOM_24HD) led |= (wacom->led.select[1] << 4) | 0x40; 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 struct attribute *intuos5_led_attrs[] = { &dev_attr_status0_luminance.attr, &dev_attr_status_led0_select.attr, NULL }; static struct attribute_group intuos5_led_attr_group = { .name = "wacom_led", .attrs = intuos5_led_attrs, }; static int wacom_initialize_leds(struct wacom *wacom) { int error; /* Initialize default values */ switch (wacom->wacom_wac.features.type) { case INTUOS4S: 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_24HD: 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; case INTUOS5S: case INTUOS5: case INTUOS5L: wacom->led.select[0] = 0; wacom->led.select[1] = 0; wacom->led.llv = 32; wacom->led.hlv = 0; wacom->led.img_lum = 0; error = sysfs_create_group(&wacom->intf->dev.kobj, &intuos5_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 INTUOS4S: case INTUOS4: case INTUOS4L: sysfs_remove_group(&wacom->intf->dev.kobj, &intuos4_led_attr_group); break; case WACOM_24HD: case WACOM_21UX2: sysfs_remove_group(&wacom->intf->dev.kobj, &cintiq_led_attr_group); break; case INTUOS5S: case INTUOS5: case INTUOS5L: sysfs_remove_group(&wacom->intf->dev.kobj, &intuos5_led_attr_group); break; } } static enum power_supply_property wacom_battery_props[] = { POWER_SUPPLY_PROP_CAPACITY }; static int wacom_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct wacom *wacom = container_of(psy, struct wacom, battery); int ret = 0; switch (psp) { case POWER_SUPPLY_PROP_CAPACITY: val->intval = wacom->wacom_wac.battery_capacity * 100 / 31; break; default: ret = -EINVAL; break; } return ret; } static int wacom_initialize_battery(struct wacom *wacom) { int error = 0; if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) { wacom->battery.properties = wacom_battery_props; wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props); wacom->battery.get_property = wacom_battery_get_property; wacom->battery.name = "wacom_battery"; wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY; wacom->battery.use_for_apm = 0; error = power_supply_register(&wacom->usbdev->dev, &wacom->battery); if (!error) power_supply_powers(&wacom->battery, &wacom->usbdev->dev); } return error; } static void wacom_destroy_battery(struct wacom *wacom) { if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR && wacom->battery.dev) { power_supply_unregister(&wacom->battery); wacom->battery.dev = NULL; } } static int wacom_register_input(struct wacom *wacom) { struct input_dev *input_dev; struct usb_interface *intf = wacom->intf; struct usb_device *dev = interface_to_usbdev(intf); struct wacom_wac *wacom_wac = &(wacom->wacom_wac); int error; input_dev = input_allocate_device(); if (!input_dev) { error = -ENOMEM; goto fail1; } 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_wac->input = input_dev; error = wacom_setup_input_capabilities(input_dev, wacom_wac); if (error) goto fail1; error = input_register_device(input_dev); if (error) goto fail2; return 0; fail2: input_free_device(input_dev); wacom_wac->input = NULL; fail1: return error; } static void wacom_wireless_work(struct work_struct *work) { struct wacom *wacom = container_of(work, struct wacom, work); struct usb_device *usbdev = wacom->usbdev; struct wacom_wac *wacom_wac = &wacom->wacom_wac; struct wacom *wacom1, *wacom2; struct wacom_wac *wacom_wac1, *wacom_wac2; int error; /* * Regardless if this is a disconnect or a new tablet, * remove any existing input and battery devices. */ wacom_destroy_battery(wacom); /* Stylus interface */ wacom1 = usb_get_intfdata(usbdev->config->interface[1]); wacom_wac1 = &(wacom1->wacom_wac); if (wacom_wac1->input) input_unregister_device(wacom_wac1->input); wacom_wac1->input = NULL; /* Touch interface */ wacom2 = usb_get_intfdata(usbdev->config->interface[2]); wacom_wac2 = &(wacom2->wacom_wac); if (wacom_wac2->input) input_unregister_device(wacom_wac2->input); wacom_wac2->input = NULL; if (wacom_wac->pid == 0) { dev_info(&wacom->intf->dev, "wireless tablet disconnected\n"); } else { const struct usb_device_id *id = wacom_ids; dev_info(&wacom->intf->dev, "wireless tablet connected with PID %x\n", wacom_wac->pid); while (id->match_flags) { if (id->idVendor == USB_VENDOR_ID_WACOM && id->idProduct == wacom_wac->pid) break; id++; } if (!id->match_flags) { dev_info(&wacom->intf->dev, "ignoring unknown PID.\n"); return; } /* Stylus interface */ wacom_wac1->features = *((struct wacom_features *)id->driver_info); wacom_wac1->features.device_type = BTN_TOOL_PEN; error = wacom_register_input(wacom1); if (error) goto fail1; /* Touch interface */ wacom_wac2->features = *((struct wacom_features *)id->driver_info); wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3; wacom_wac2->features.device_type = BTN_TOOL_FINGER; wacom_set_phy_from_res(&wacom_wac2->features); wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096; error = wacom_register_input(wacom2); if (error) goto fail2; error = wacom_initialize_battery(wacom); if (error) goto fail3; } return; fail3: input_unregister_device(wacom_wac2->input); wacom_wac2->input = NULL; fail2: input_unregister_device(wacom_wac1->input); wacom_wac1->input = NULL; fail1: return; } 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; int error; if (!id->driver_info) return -EINVAL; wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL); if (!wacom) return -ENOMEM; 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); INIT_WORK(&wacom->work, wacom_wireless_work); usb_make_path(dev, wacom->phys, sizeof(wacom->phys)); strlcat(wacom->phys, "/input0", sizeof(wacom->phys)); endpoint = &intf->cur_altsetting->endpoint[0].desc; /* Retrieve the physical and logical size for touch devices */ error = wacom_retrieve_hid_descriptor(intf, features); if (error) goto fail3; /* * Intuos5 has no useful data about its touch interface in its * HID descriptor. If this is the touch interface (wMaxPacketSize * of WACOM_PKGLEN_BBTOUCH3), override the table values. */ if (features->type >= INTUOS5S && features->type <= INTUOS5L) { if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) { features->device_type = BTN_TOOL_FINGER; features->pktlen = WACOM_PKGLEN_BBTOUCH3; wacom_set_phy_from_res(features); features->x_max = 4096; features->y_max = 4096; } else { features->device_type = BTN_TOOL_PEN; } } 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; } 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; if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) { error = wacom_register_input(wacom); 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); if (features->quirks & WACOM_QUIRK_MONITOR) { if (usb_submit_urb(wacom->irq, GFP_KERNEL)) goto fail5; } 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: 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); cancel_work_sync(&wacom->work); if (wacom->wacom_wac.input) input_unregister_device(wacom->wacom_wac.input); wacom_destroy_battery(wacom); 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 || features->quirks & WACOM_QUIRK_MONITOR) && 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);