| /* |
| * 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; |
| |
| switch (features->type) { |
| case TABLETPC2FG: |
| features->pktlen = WACOM_PKGLEN_TPC2FG; |
| break; |
| |
| case MTSCREEN: |
| case WACOM_24HDT: |
| features->pktlen = WACOM_PKGLEN_MTOUCH; |
| break; |
| |
| case MTTPC: |
| features->pktlen = WACOM_PKGLEN_MTTPC; |
| break; |
| |
| case BAMBOO_PT: |
| features->pktlen = WACOM_PKGLEN_BBTOUCH; |
| break; |
| |
| default: |
| features->pktlen = WACOM_PKGLEN_GRAPHIRE; |
| break; |
| } |
| |
| 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; |
| |
| 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 */ |
| if (features->type >= TABLETPC) |
| 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) { |
| 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; |
| |
| 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_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->type == WACOM_24HDT) { |
| return wacom_set_device_mode(intf, 18, 3, 2); |
| } |
| } 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 usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product) |
| { |
| int port1; |
| struct usb_device *sibling; |
| |
| if (vendor == 0 && product == 0) |
| return dev; |
| |
| if (dev->parent == NULL) |
| return NULL; |
| |
| usb_hub_for_each_child(dev->parent, port1, sibling) { |
| struct usb_device_descriptor *d; |
| if (sibling == NULL) |
| continue; |
| |
| d = &sibling->descriptor; |
| if (d->idVendor == vendor && d->idProduct == product) |
| return sibling; |
| } |
| |
| return NULL; |
| } |
| |
| 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) { |
| struct usb_device *other_dev; |
| |
| /* Append the device type to the name */ |
| strlcat(wacom_wac->name, |
| features->device_type == BTN_TOOL_PEN ? |
| " Pen" : " Finger", |
| sizeof(wacom_wac->name)); |
| |
| |
| other_dev = wacom_get_sibling(dev, features->oVid, features->oPid); |
| if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL) |
| other_dev = dev; |
| error = wacom_add_shared_data(wacom_wac, other_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); |