/* * 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" #include #define HID_HDESC_USAGE_UNDEFINED 0x00 #define HID_HDESC_USAGE_PAGE 0x05 #define HID_HDESC_USAGE 0x09 #define HID_HDESC_COLLECTION 0xa1 #define HID_HDESC_COLLECTION_LOGICAL 0x02 #define HID_HDESC_COLLECTION_END 0xc0 #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 hid_device *hdev, u8 type, u8 id, void *buf, size_t size, unsigned int retries) { int retval; do { retval = hid_hw_raw_request(hdev, id, buf, size, type, HID_REQ_GET_REPORT); } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries); return retval; } static int wacom_set_report(struct hid_device *hdev, u8 type, u8 id, void *buf, size_t size, unsigned int retries) { int retval; do { retval = hid_hw_raw_request(hdev, id, buf, size, type, HID_REQ_SET_REPORT); } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries); return retval; } static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *raw_data, int size) { struct wacom *wacom = hid_get_drvdata(hdev); if (size > WACOM_PKGLEN_MAX) return 1; memcpy(wacom->wacom_wac.data, raw_data, size); wacom_wac_irq(&wacom->wacom_wac, size); return 0; } static int wacom_open(struct input_dev *dev) { struct wacom *wacom = input_get_drvdata(dev); int retval; mutex_lock(&wacom->lock); retval = hid_hw_open(wacom->hdev); mutex_unlock(&wacom->lock); return retval; } static void wacom_close(struct input_dev *dev) { struct wacom *wacom = input_get_drvdata(dev); mutex_lock(&wacom->lock); hid_hw_close(wacom->hdev); mutex_unlock(&wacom->lock); } /* * 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; } 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->device_type = BTN_TOOL_FINGER; features->x_max = features->y_max = get_unaligned_le16(&report[10]); length = 11; } return length; } static void wacom_retrieve_report_data(struct hid_device *hdev, 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(hdev, 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 hid_device *hdev, struct wacom_features *features) { /* result has to be defined as int for some devices */ int result = 0, touch_max = 0; int i = 0, page = 0, finger = 0, pen = 0; unsigned char *report = hdev->rdesc; for (i = 0; i < hdev->rsize; i++) { switch (report[i]) { case HID_HDESC_USAGE_PAGE: page = report[i + 1]; i++; break; case HID_HDESC_USAGE: switch (page << 16 | report[i + 1]) { case HID_GD_X: if (finger) { features->device_type = BTN_TOOL_FINGER; /* touch device at least supports one touch point */ touch_max = 1; switch (features->type) { case BAMBOO_PT: features->x_phy = get_unaligned_le16(&report[i + 5]); features->x_max = get_unaligned_le16(&report[i + 8]); i += 15; break; case WACOM_24HDT: features->x_max = get_unaligned_le16(&report[i + 3]); features->x_phy = get_unaligned_le16(&report[i + 8]); features->unit = report[i - 1]; features->unitExpo = report[i - 3]; i += 12; break; case MTTPC_B: features->x_max = get_unaligned_le16(&report[i + 3]); features->x_phy = get_unaligned_le16(&report[i + 6]); features->unit = report[i - 5]; features->unitExpo = report[i - 3]; i += 9; break; default: 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; break; } } else if (pen) { /* penabled only accepts exact bytes of data */ features->device_type = BTN_TOOL_PEN; features->x_max = get_unaligned_le16(&report[i + 3]); i += 4; } break; case HID_GD_Y: if (finger) { switch (features->type) { case TABLETPC2FG: case MTSCREEN: case MTTPC: features->y_max = get_unaligned_le16(&report[i + 3]); features->y_phy = get_unaligned_le16(&report[i + 6]); i += 7; break; case WACOM_24HDT: features->y_max = get_unaligned_le16(&report[i + 3]); features->y_phy = get_unaligned_le16(&report[i - 2]); i += 7; break; case BAMBOO_PT: features->y_phy = get_unaligned_le16(&report[i + 3]); features->y_max = get_unaligned_le16(&report[i + 6]); i += 12; break; case MTTPC_B: features->y_max = get_unaligned_le16(&report[i + 3]); features->y_phy = get_unaligned_le16(&report[i + 6]); i += 9; break; default: features->y_max = features->x_max; features->y_phy = get_unaligned_le16(&report[i + 3]); i += 4; break; } } else if (pen) { features->y_max = get_unaligned_le16(&report[i + 3]); i += 4; } break; case HID_DG_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_DG_STYLUS: pen = 1; i++; break; case HID_DG_CONTACTMAX: /* leave touch_max as is if predefined */ if (!features->touch_max) wacom_retrieve_report_data(hdev, features); i++; break; case HID_DG_TIPPRESSURE: if (pen) { features->pressure_max = get_unaligned_le16(&report[i + 3]); i += 4; } break; } break; case HID_HDESC_COLLECTION_END: /* reset UsagePage and Finger */ finger = page = 0; break; case HID_HDESC_COLLECTION: i++; switch (report[i]) { case HID_HDESC_COLLECTION_LOGICAL: i += wacom_parse_logical_collection(&report[i], features); break; } break; } } if (!features->touch_max && touch_max) features->touch_max = touch_max; result = 0; return result; } static int wacom_set_device_mode(struct hid_device *hdev, 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; do { rep_data[0] = report_id; rep_data[1] = mode; error = wacom_set_report(hdev, HID_FEATURE_REPORT, report_id, rep_data, length, 1); if (error >= 0) error = wacom_get_report(hdev, 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 hid_device *hdev, struct wacom_features *features) { if (features->device_type == BTN_TOOL_FINGER) { if (features->type > TABLETPC) { /* MT Tablet PC touch */ return wacom_set_device_mode(hdev, 3, 4, 4); } else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) { return wacom_set_device_mode(hdev, 18, 3, 2); } } else if (features->device_type == BTN_TOOL_PEN) { if (features->type <= BAMBOO_PT && features->type != WIRELESS) { return wacom_set_device_mode(hdev, 2, 2, 2); } } return 0; } static int wacom_retrieve_hid_descriptor(struct hid_device *hdev, struct wacom_features *features) { int error = 0; struct wacom *wacom = hid_get_drvdata(hdev); struct usb_interface *intf = wacom->intf; /* 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 = wacom_parse_hid(hdev, features); out: return error; } struct wacom_hdev_data { struct list_head list; struct kref kref; struct hid_device *dev; struct wacom_shared shared; }; static LIST_HEAD(wacom_udev_list); static DEFINE_MUTEX(wacom_udev_list_lock); static bool wacom_are_sibling(struct hid_device *hdev, struct hid_device *sibling) { struct wacom *wacom = hid_get_drvdata(hdev); struct wacom_features *features = &wacom->wacom_wac.features; int vid = features->oVid; int pid = features->oPid; int n1,n2; if (vid == 0 && pid == 0) { vid = hdev->vendor; pid = hdev->product; } if (vid != sibling->vendor || pid != sibling->product) return false; /* Compare the physical path. */ n1 = strrchr(hdev->phys, '.') - hdev->phys; n2 = strrchr(sibling->phys, '.') - sibling->phys; if (n1 != n2 || n1 <= 0 || n2 <= 0) return false; return !strncmp(hdev->phys, sibling->phys, n1); } static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev) { struct wacom_hdev_data *data; list_for_each_entry(data, &wacom_udev_list, list) { if (wacom_are_sibling(hdev, data->dev)) { kref_get(&data->kref); return data; } } return NULL; } static int wacom_add_shared_data(struct hid_device *hdev) { struct wacom *wacom = hid_get_drvdata(hdev); struct wacom_wac *wacom_wac = &wacom->wacom_wac; struct wacom_hdev_data *data; int retval = 0; mutex_lock(&wacom_udev_list_lock); data = wacom_get_hdev_data(hdev); if (!data) { data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL); if (!data) { retval = -ENOMEM; goto out; } kref_init(&data->kref); data->dev = hdev; list_add_tail(&data->list, &wacom_udev_list); } wacom_wac->shared = &data->shared; out: mutex_unlock(&wacom_udev_list_lock); return retval; } static void wacom_release_shared_data(struct kref *kref) { struct wacom_hdev_data *data = container_of(kref, struct wacom_hdev_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_hdev_data *data; if (wacom->shared) { data = container_of(wacom->shared, struct wacom_hdev_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 <= INTUOSPL) { /* * 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->hdev, HID_FEATURE_REPORT, 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->hdev, HID_FEATURE_REPORT, 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->hdev, HID_FEATURE_REPORT, 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->hdev, HID_FEATURE_REPORT, 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 hid_device *hdev = container_of(dev, struct hid_device, dev); struct wacom *wacom = hid_get_drvdata(hdev); 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 hid_device *hdev = container_of(dev, struct hid_device, dev);\ struct wacom *wacom = hid_get_drvdata(hdev); \ 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 hid_device *hdev = container_of(dev, struct hid_device, dev);\ struct wacom *wacom = hid_get_drvdata(hdev); \ \ 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 hid_device *hdev = container_of(dev, struct hid_device, dev); struct wacom *wacom = hid_get_drvdata(hdev); 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->hdev->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->hdev->dev.kobj, &cintiq_led_attr_group); break; case INTUOS5S: case INTUOS5: case INTUOS5L: case INTUOSPS: case INTUOSPM: case INTUOSPL: if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) { 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->hdev->dev.kobj, &intuos5_led_attr_group); } else return 0; break; default: return 0; } if (error) { hid_err(wacom->hdev, "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->hdev->dev.kobj, &intuos4_led_attr_group); break; case WACOM_24HD: case WACOM_21UX2: sysfs_remove_group(&wacom->hdev->dev.kobj, &cintiq_led_attr_group); break; case INTUOS5S: case INTUOS5: case INTUOS5L: case INTUOSPS: case INTUOSPM: case INTUOSPL: if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) sysfs_remove_group(&wacom->hdev->dev.kobj, &intuos5_led_attr_group); break; } } static enum power_supply_property wacom_battery_props[] = { POWER_SUPPLY_PROP_SCOPE, 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_SCOPE: val->intval = POWER_SUPPLY_SCOPE_DEVICE; break; 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->hdev->dev, &wacom->battery); if (!error) power_supply_powers(&wacom->battery, &wacom->hdev->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 struct input_dev *wacom_allocate_input(struct wacom *wacom) { struct input_dev *input_dev; struct hid_device *hdev = wacom->hdev; struct wacom_wac *wacom_wac = &(wacom->wacom_wac); input_dev = input_allocate_device(); if (!input_dev) return NULL; input_dev->name = wacom_wac->name; input_dev->phys = hdev->phys; input_dev->dev.parent = &hdev->dev; input_dev->open = wacom_open; input_dev->close = wacom_close; input_dev->uniq = hdev->uniq; input_dev->id.bustype = hdev->bus; input_dev->id.vendor = hdev->vendor; input_dev->id.product = hdev->product; input_dev->id.version = hdev->version; input_set_drvdata(input_dev, wacom); return input_dev; } static void wacom_unregister_inputs(struct wacom *wacom) { if (wacom->wacom_wac.input) input_unregister_device(wacom->wacom_wac.input); if (wacom->wacom_wac.pad_input) input_unregister_device(wacom->wacom_wac.pad_input); wacom->wacom_wac.input = NULL; wacom->wacom_wac.pad_input = NULL; } static int wacom_register_inputs(struct wacom *wacom) { struct input_dev *input_dev, *pad_input_dev; struct wacom_wac *wacom_wac = &(wacom->wacom_wac); int error; input_dev = wacom_allocate_input(wacom); pad_input_dev = wacom_allocate_input(wacom); if (!input_dev || !pad_input_dev) { error = -ENOMEM; goto fail1; } wacom_wac->input = input_dev; wacom_wac->pad_input = pad_input_dev; wacom_wac->pad_input->name = wacom_wac->pad_name; error = wacom_setup_input_capabilities(input_dev, wacom_wac); if (error) goto fail2; error = input_register_device(input_dev); if (error) goto fail2; error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac); if (error) { /* no pad in use on this interface */ input_free_device(pad_input_dev); wacom_wac->pad_input = NULL; pad_input_dev = NULL; } else { error = input_register_device(pad_input_dev); if (error) goto fail3; } return 0; fail3: input_unregister_device(input_dev); input_dev = NULL; fail2: wacom_wac->input = NULL; wacom_wac->pad_input = NULL; fail1: if (input_dev) input_free_device(input_dev); if (pad_input_dev) input_free_device(pad_input_dev); 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 hid_device *hdev1, *hdev2; 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 */ hdev1 = usb_get_intfdata(usbdev->config->interface[1]); wacom1 = hid_get_drvdata(hdev1); wacom_wac1 = &(wacom1->wacom_wac); wacom_unregister_inputs(wacom1); /* Touch interface */ hdev2 = usb_get_intfdata(usbdev->config->interface[2]); wacom2 = hid_get_drvdata(hdev2); wacom_wac2 = &(wacom2->wacom_wac); wacom_unregister_inputs(wacom2); if (wacom_wac->pid == 0) { hid_info(wacom->hdev, "wireless tablet disconnected\n"); } else { const struct hid_device_id *id = wacom_ids; hid_info(wacom->hdev, "wireless tablet connected with PID %x\n", wacom_wac->pid); while (id->bus) { if (id->vendor == USB_VENDOR_ID_WACOM && id->product == wacom_wac->pid) break; id++; } if (!id->bus) { hid_info(wacom->hdev, "ignoring unknown PID.\n"); return; } /* Stylus interface */ wacom_wac1->features = *((struct wacom_features *)id->driver_data); wacom_wac1->features.device_type = BTN_TOOL_PEN; snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen", wacom_wac1->features.name); snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad", wacom_wac1->features.name); wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max; wacom_wac1->shared->type = wacom_wac1->features.type; error = wacom_register_inputs(wacom1); if (error) goto fail; /* Touch interface */ if (wacom_wac1->features.touch_max || wacom_wac1->features.type == INTUOSHT) { wacom_wac2->features = *((struct wacom_features *)id->driver_data); wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3; wacom_wac2->features.device_type = BTN_TOOL_FINGER; wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096; if (wacom_wac2->features.touch_max) snprintf(wacom_wac2->name, WACOM_NAME_MAX, "%s (WL) Finger",wacom_wac2->features.name); else snprintf(wacom_wac2->name, WACOM_NAME_MAX, "%s (WL) Pad",wacom_wac2->features.name); snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX, "%s (WL) Pad", wacom_wac2->features.name); error = wacom_register_inputs(wacom2); if (error) goto fail; if (wacom_wac1->features.type == INTUOSHT && wacom_wac1->features.touch_max) wacom_wac->shared->touch_input = wacom_wac2->input; } error = wacom_initialize_battery(wacom); if (error) goto fail; } return; fail: wacom_unregister_inputs(wacom1); wacom_unregister_inputs(wacom2); return; } /* * Not all devices report physical dimensions from HID. * Compute the default from hardcoded logical dimension * and resolution before driver overwrites them. */ static void wacom_set_default_phy(struct wacom_features *features) { if (features->x_resolution) { features->x_phy = (features->x_max * 100) / features->x_resolution; features->y_phy = (features->y_max * 100) / features->y_resolution; } } static void wacom_calculate_res(struct wacom_features *features) { features->x_resolution = wacom_calc_hid_res(features->x_max, features->x_phy, features->unit, features->unitExpo); features->y_resolution = wacom_calc_hid_res(features->y_max, features->y_phy, features->unit, features->unitExpo); } static int wacom_hid_report_len(struct hid_report *report) { /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */ return ((report->size - 1) >> 3) + 1 + (report->id > 0); } static size_t wacom_compute_pktlen(struct hid_device *hdev) { struct hid_report_enum *report_enum; struct hid_report *report; size_t size = 0; report_enum = hdev->report_enum + HID_INPUT_REPORT; list_for_each_entry(report, &report_enum->report_list, list) { size_t report_size = wacom_hid_report_len(report); if (report_size > size) size = report_size; } return size; } static int wacom_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); struct usb_device *dev = interface_to_usbdev(intf); struct wacom *wacom; struct wacom_wac *wacom_wac; struct wacom_features *features; int error; if (!id->driver_data) return -EINVAL; wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL); if (!wacom) return -ENOMEM; hid_set_drvdata(hdev, wacom); wacom->hdev = hdev; /* ask for the report descriptor to be loaded by HID */ error = hid_parse(hdev); if (error) { hid_err(hdev, "parse failed\n"); goto fail1; } wacom_wac = &wacom->wacom_wac; wacom_wac->features = *((struct wacom_features *)id->driver_data); features = &wacom_wac->features; features->pktlen = wacom_compute_pktlen(hdev); if (features->pktlen > WACOM_PKGLEN_MAX) { error = -EINVAL; goto fail1; } if (features->check_for_hid_type && features->hid_type != hdev->type) { error = -ENODEV; goto fail1; } wacom->usbdev = dev; wacom->intf = intf; mutex_init(&wacom->lock); INIT_WORK(&wacom->work, wacom_wireless_work); /* set the default size in case we do not get them from hid */ wacom_set_default_phy(features); /* Retrieve the physical and logical size for touch devices */ error = wacom_retrieve_hid_descriptor(hdev, features); if (error) goto fail1; /* * Intuos5 has no useful data about its touch interface in its * HID descriptor. If this is the touch interface (PacketSize * of WACOM_PKGLEN_BBTOUCH3), override the table values. */ if (features->type >= INTUOS5S && features->type <= INTUOSHT) { if (features->pktlen == WACOM_PKGLEN_BBTOUCH3) { features->device_type = BTN_TOOL_FINGER; features->x_max = 4096; features->y_max = 4096; } else { features->device_type = BTN_TOOL_PEN; } } wacom_setup_device_quirks(features); /* set unit to "100th of a mm" for devices not reported by HID */ if (!features->unit) { features->unit = 0x11; features->unitExpo = 16 - 3; } wacom_calculate_res(features); strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name)); snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name), "%s Pad", features->name); if (features->quirks & WACOM_QUIRK_MULTI_INPUT) { /* Append the device type to the name */ if (features->device_type != BTN_TOOL_FINGER) strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX); else if (features->touch_max) strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX); else strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX); error = wacom_add_shared_data(hdev); if (error) goto fail1; } error = wacom_initialize_leds(wacom); if (error) goto fail2; if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) { error = wacom_register_inputs(wacom); if (error) goto fail3; } /* Note that if query fails it is not a hard failure */ wacom_query_tablet_data(hdev, features); /* Regular HID work starts now */ error = hid_hw_start(hdev, HID_CONNECT_HIDRAW); if (error) { hid_err(hdev, "hw start failed\n"); goto fail4; } if (features->quirks & WACOM_QUIRK_MONITOR) error = hid_hw_open(hdev); if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) { if (wacom_wac->features.device_type == BTN_TOOL_FINGER) wacom_wac->shared->touch_input = wacom_wac->input; } return 0; fail4: wacom_unregister_inputs(wacom); fail3: wacom_destroy_leds(wacom); fail2: wacom_remove_shared_data(wacom_wac); fail1: kfree(wacom); hid_set_drvdata(hdev, NULL); return error; } static void wacom_remove(struct hid_device *hdev) { struct wacom *wacom = hid_get_drvdata(hdev); hid_hw_stop(hdev); cancel_work_sync(&wacom->work); wacom_unregister_inputs(wacom); wacom_destroy_battery(wacom); wacom_destroy_leds(wacom); wacom_remove_shared_data(&wacom->wacom_wac); hid_set_drvdata(hdev, NULL); kfree(wacom); } static int wacom_resume(struct hid_device *hdev) { struct wacom *wacom = hid_get_drvdata(hdev); struct wacom_features *features = &wacom->wacom_wac.features; mutex_lock(&wacom->lock); /* switch to wacom mode first */ wacom_query_tablet_data(hdev, features); wacom_led_control(wacom); mutex_unlock(&wacom->lock); return 0; } static int wacom_reset_resume(struct hid_device *hdev) { return wacom_resume(hdev); } static struct hid_driver wacom_driver = { .name = "wacom", .id_table = wacom_ids, .probe = wacom_probe, .remove = wacom_remove, #ifdef CONFIG_PM .resume = wacom_resume, .reset_resume = wacom_reset_resume, #endif .raw_event = wacom_raw_event, }; module_hid_driver(wacom_driver);