diff options
Diffstat (limited to 'drivers/hid/hid-logitech-dj.c')
| -rw-r--r-- | drivers/hid/hid-logitech-dj.c | 1946 |
1 files changed, 1946 insertions, 0 deletions
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c new file mode 100644 index 000000000..f4d79ec82 --- /dev/null +++ b/drivers/hid/hid-logitech-dj.c @@ -0,0 +1,1946 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HID driver for Logitech receivers + * + * Copyright (c) 2011 Logitech + */ + + + +#include <linux/device.h> +#include <linux/hid.h> +#include <linux/module.h> +#include <linux/kfifo.h> +#include <linux/delay.h> +#include <linux/usb.h> /* For to_usb_interface for kvm extra intf check */ +#include <asm/unaligned.h> +#include "hid-ids.h" + +#define DJ_MAX_PAIRED_DEVICES 7 +#define DJ_MAX_NUMBER_NOTIFS 8 +#define DJ_RECEIVER_INDEX 0 +#define DJ_DEVICE_INDEX_MIN 1 +#define DJ_DEVICE_INDEX_MAX 7 + +#define DJREPORT_SHORT_LENGTH 15 +#define DJREPORT_LONG_LENGTH 32 + +#define REPORT_ID_DJ_SHORT 0x20 +#define REPORT_ID_DJ_LONG 0x21 + +#define REPORT_ID_HIDPP_SHORT 0x10 +#define REPORT_ID_HIDPP_LONG 0x11 +#define REPORT_ID_HIDPP_VERY_LONG 0x12 + +#define HIDPP_REPORT_SHORT_LENGTH 7 +#define HIDPP_REPORT_LONG_LENGTH 20 + +#define HIDPP_RECEIVER_INDEX 0xff + +#define REPORT_TYPE_RFREPORT_FIRST 0x01 +#define REPORT_TYPE_RFREPORT_LAST 0x1F + +/* Command Switch to DJ mode */ +#define REPORT_TYPE_CMD_SWITCH 0x80 +#define CMD_SWITCH_PARAM_DEVBITFIELD 0x00 +#define CMD_SWITCH_PARAM_TIMEOUT_SECONDS 0x01 +#define TIMEOUT_NO_KEEPALIVE 0x00 + +/* Command to Get the list of Paired devices */ +#define REPORT_TYPE_CMD_GET_PAIRED_DEVICES 0x81 + +/* Device Paired Notification */ +#define REPORT_TYPE_NOTIF_DEVICE_PAIRED 0x41 +#define SPFUNCTION_MORE_NOTIF_EXPECTED 0x01 +#define SPFUNCTION_DEVICE_LIST_EMPTY 0x02 +#define DEVICE_PAIRED_PARAM_SPFUNCTION 0x00 +#define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB 0x01 +#define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB 0x02 +#define DEVICE_PAIRED_RF_REPORT_TYPE 0x03 + +/* Device Un-Paired Notification */ +#define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED 0x40 + +/* Connection Status Notification */ +#define REPORT_TYPE_NOTIF_CONNECTION_STATUS 0x42 +#define CONNECTION_STATUS_PARAM_STATUS 0x00 +#define STATUS_LINKLOSS 0x01 + +/* Error Notification */ +#define REPORT_TYPE_NOTIF_ERROR 0x7F +#define NOTIF_ERROR_PARAM_ETYPE 0x00 +#define ETYPE_KEEPALIVE_TIMEOUT 0x01 + +/* supported DJ HID && RF report types */ +#define REPORT_TYPE_KEYBOARD 0x01 +#define REPORT_TYPE_MOUSE 0x02 +#define REPORT_TYPE_CONSUMER_CONTROL 0x03 +#define REPORT_TYPE_SYSTEM_CONTROL 0x04 +#define REPORT_TYPE_MEDIA_CENTER 0x08 +#define REPORT_TYPE_LEDS 0x0E + +/* RF Report types bitfield */ +#define STD_KEYBOARD BIT(1) +#define STD_MOUSE BIT(2) +#define MULTIMEDIA BIT(3) +#define POWER_KEYS BIT(4) +#define MEDIA_CENTER BIT(8) +#define KBD_LEDS BIT(14) +/* Fake (bitnr > NUMBER_OF_HID_REPORTS) bit to track HID++ capability */ +#define HIDPP BIT_ULL(63) + +/* HID++ Device Connected Notification */ +#define REPORT_TYPE_NOTIF_DEVICE_CONNECTED 0x41 +#define HIDPP_PARAM_PROTO_TYPE 0x00 +#define HIDPP_PARAM_DEVICE_INFO 0x01 +#define HIDPP_PARAM_EQUAD_LSB 0x02 +#define HIDPP_PARAM_EQUAD_MSB 0x03 +#define HIDPP_PARAM_27MHZ_DEVID 0x03 +#define HIDPP_DEVICE_TYPE_MASK GENMASK(3, 0) +#define HIDPP_LINK_STATUS_MASK BIT(6) +#define HIDPP_MANUFACTURER_MASK BIT(7) + +#define HIDPP_DEVICE_TYPE_KEYBOARD 1 +#define HIDPP_DEVICE_TYPE_MOUSE 2 + +#define HIDPP_SET_REGISTER 0x80 +#define HIDPP_GET_LONG_REGISTER 0x83 +#define HIDPP_REG_CONNECTION_STATE 0x02 +#define HIDPP_REG_PAIRING_INFORMATION 0xB5 +#define HIDPP_PAIRING_INFORMATION 0x20 +#define HIDPP_FAKE_DEVICE_ARRIVAL 0x02 + +enum recvr_type { + recvr_type_dj, + recvr_type_hidpp, + recvr_type_gaming_hidpp, + recvr_type_mouse_only, + recvr_type_27mhz, + recvr_type_bluetooth, +}; + +struct dj_report { + u8 report_id; + u8 device_index; + u8 report_type; + u8 report_params[DJREPORT_SHORT_LENGTH - 3]; +}; + +struct hidpp_event { + u8 report_id; + u8 device_index; + u8 sub_id; + u8 params[HIDPP_REPORT_LONG_LENGTH - 3U]; +} __packed; + +struct dj_receiver_dev { + struct hid_device *mouse; + struct hid_device *keyboard; + struct hid_device *hidpp; + struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES + + DJ_DEVICE_INDEX_MIN]; + struct list_head list; + struct kref kref; + struct work_struct work; + struct kfifo notif_fifo; + unsigned long last_query; /* in jiffies */ + bool ready; + enum recvr_type type; + unsigned int unnumbered_application; + spinlock_t lock; +}; + +struct dj_device { + struct hid_device *hdev; + struct dj_receiver_dev *dj_receiver_dev; + u64 reports_supported; + u8 device_index; +}; + +#define WORKITEM_TYPE_EMPTY 0 +#define WORKITEM_TYPE_PAIRED 1 +#define WORKITEM_TYPE_UNPAIRED 2 +#define WORKITEM_TYPE_UNKNOWN 255 + +struct dj_workitem { + u8 type; /* WORKITEM_TYPE_* */ + u8 device_index; + u8 device_type; + u8 quad_id_msb; + u8 quad_id_lsb; + u64 reports_supported; +}; + +/* Keyboard descriptor (1) */ +static const char kbd_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */ + 0x09, 0x06, /* USAGE (Keyboard) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x01, /* REPORT_ID (1) */ + 0x95, 0x08, /* REPORT_COUNT (8) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ + 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ + 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */ + 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */ + 0x81, 0x02, /* INPUT (Data,Var,Abs) */ + 0x95, 0x06, /* REPORT_COUNT (6) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */ + 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ + 0x19, 0x00, /* USAGE_MINIMUM (no event) */ + 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */ + 0x81, 0x00, /* INPUT (Data,Ary,Abs) */ + 0x85, 0x0e, /* REPORT_ID (14) */ + 0x05, 0x08, /* USAGE PAGE (LED page) */ + 0x95, 0x05, /* REPORT COUNT (5) */ + 0x75, 0x01, /* REPORT SIZE (1) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ + 0x19, 0x01, /* USAGE MINIMUM (1) */ + 0x29, 0x05, /* USAGE MAXIMUM (5) */ + 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */ + 0x95, 0x01, /* REPORT COUNT (1) */ + 0x75, 0x03, /* REPORT SIZE (3) */ + 0x91, 0x01, /* OUTPUT (Constant) */ + 0xC0 +}; + +/* Mouse descriptor (2) */ +static const char mse_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x02, /* USAGE (Mouse) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x02, /* REPORT_ID = 2 */ + 0x09, 0x01, /* USAGE (pointer) */ + 0xA1, 0x00, /* COLLECTION (physical) */ + 0x05, 0x09, /* USAGE_PAGE (buttons) */ + 0x19, 0x01, /* USAGE_MIN (1) */ + 0x29, 0x10, /* USAGE_MAX (16) */ + 0x15, 0x00, /* LOGICAL_MIN (0) */ + 0x25, 0x01, /* LOGICAL_MAX (1) */ + 0x95, 0x10, /* REPORT_COUNT (16) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x81, 0x02, /* INPUT (data var abs) */ + 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ + 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ + 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ + 0x75, 0x0C, /* REPORT_SIZE (12) */ + 0x95, 0x02, /* REPORT_COUNT (2) */ + 0x09, 0x30, /* USAGE (X) */ + 0x09, 0x31, /* USAGE (Y) */ + 0x81, 0x06, /* INPUT */ + 0x15, 0x81, /* LOGICAL_MIN (-127) */ + 0x25, 0x7F, /* LOGICAL_MAX (127) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x09, 0x38, /* USAGE (wheel) */ + 0x81, 0x06, /* INPUT */ + 0x05, 0x0C, /* USAGE_PAGE(consumer) */ + 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x81, 0x06, /* INPUT */ + 0xC0, /* END_COLLECTION */ + 0xC0, /* END_COLLECTION */ +}; + +/* Mouse descriptor (2) for 27 MHz receiver, only 8 buttons */ +static const char mse_27mhz_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x02, /* USAGE (Mouse) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x02, /* REPORT_ID = 2 */ + 0x09, 0x01, /* USAGE (pointer) */ + 0xA1, 0x00, /* COLLECTION (physical) */ + 0x05, 0x09, /* USAGE_PAGE (buttons) */ + 0x19, 0x01, /* USAGE_MIN (1) */ + 0x29, 0x08, /* USAGE_MAX (8) */ + 0x15, 0x00, /* LOGICAL_MIN (0) */ + 0x25, 0x01, /* LOGICAL_MAX (1) */ + 0x95, 0x08, /* REPORT_COUNT (8) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x81, 0x02, /* INPUT (data var abs) */ + 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ + 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ + 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ + 0x75, 0x0C, /* REPORT_SIZE (12) */ + 0x95, 0x02, /* REPORT_COUNT (2) */ + 0x09, 0x30, /* USAGE (X) */ + 0x09, 0x31, /* USAGE (Y) */ + 0x81, 0x06, /* INPUT */ + 0x15, 0x81, /* LOGICAL_MIN (-127) */ + 0x25, 0x7F, /* LOGICAL_MAX (127) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x09, 0x38, /* USAGE (wheel) */ + 0x81, 0x06, /* INPUT */ + 0x05, 0x0C, /* USAGE_PAGE(consumer) */ + 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x81, 0x06, /* INPUT */ + 0xC0, /* END_COLLECTION */ + 0xC0, /* END_COLLECTION */ +}; + +/* Mouse descriptor (2) for Bluetooth receiver, low-res hwheel, 12 buttons */ +static const char mse_bluetooth_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x02, /* USAGE (Mouse) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x02, /* REPORT_ID = 2 */ + 0x09, 0x01, /* USAGE (pointer) */ + 0xA1, 0x00, /* COLLECTION (physical) */ + 0x05, 0x09, /* USAGE_PAGE (buttons) */ + 0x19, 0x01, /* USAGE_MIN (1) */ + 0x29, 0x08, /* USAGE_MAX (8) */ + 0x15, 0x00, /* LOGICAL_MIN (0) */ + 0x25, 0x01, /* LOGICAL_MAX (1) */ + 0x95, 0x08, /* REPORT_COUNT (8) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x81, 0x02, /* INPUT (data var abs) */ + 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ + 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ + 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ + 0x75, 0x0C, /* REPORT_SIZE (12) */ + 0x95, 0x02, /* REPORT_COUNT (2) */ + 0x09, 0x30, /* USAGE (X) */ + 0x09, 0x31, /* USAGE (Y) */ + 0x81, 0x06, /* INPUT */ + 0x15, 0x81, /* LOGICAL_MIN (-127) */ + 0x25, 0x7F, /* LOGICAL_MAX (127) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x09, 0x38, /* USAGE (wheel) */ + 0x81, 0x06, /* INPUT */ + 0x05, 0x0C, /* USAGE_PAGE(consumer) */ + 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ + 0x15, 0xF9, /* LOGICAL_MIN (-7) */ + 0x25, 0x07, /* LOGICAL_MAX (7) */ + 0x75, 0x04, /* REPORT_SIZE (4) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x81, 0x06, /* INPUT */ + 0x05, 0x09, /* USAGE_PAGE (buttons) */ + 0x19, 0x09, /* USAGE_MIN (9) */ + 0x29, 0x0C, /* USAGE_MAX (12) */ + 0x15, 0x00, /* LOGICAL_MIN (0) */ + 0x25, 0x01, /* LOGICAL_MAX (1) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x95, 0x04, /* REPORT_COUNT (4) */ + 0x81, 0x02, /* INPUT (Data,Var,Abs) */ + 0xC0, /* END_COLLECTION */ + 0xC0, /* END_COLLECTION */ +}; + +/* Gaming Mouse descriptor (2) */ +static const char mse_high_res_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x02, /* USAGE (Mouse) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x02, /* REPORT_ID = 2 */ + 0x09, 0x01, /* USAGE (pointer) */ + 0xA1, 0x00, /* COLLECTION (physical) */ + 0x05, 0x09, /* USAGE_PAGE (buttons) */ + 0x19, 0x01, /* USAGE_MIN (1) */ + 0x29, 0x10, /* USAGE_MAX (16) */ + 0x15, 0x00, /* LOGICAL_MIN (0) */ + 0x25, 0x01, /* LOGICAL_MAX (1) */ + 0x95, 0x10, /* REPORT_COUNT (16) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x81, 0x02, /* INPUT (data var abs) */ + 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ + 0x16, 0x01, 0x80, /* LOGICAL_MIN (-32767) */ + 0x26, 0xFF, 0x7F, /* LOGICAL_MAX (32767) */ + 0x75, 0x10, /* REPORT_SIZE (16) */ + 0x95, 0x02, /* REPORT_COUNT (2) */ + 0x09, 0x30, /* USAGE (X) */ + 0x09, 0x31, /* USAGE (Y) */ + 0x81, 0x06, /* INPUT */ + 0x15, 0x81, /* LOGICAL_MIN (-127) */ + 0x25, 0x7F, /* LOGICAL_MAX (127) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x09, 0x38, /* USAGE (wheel) */ + 0x81, 0x06, /* INPUT */ + 0x05, 0x0C, /* USAGE_PAGE(consumer) */ + 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x81, 0x06, /* INPUT */ + 0xC0, /* END_COLLECTION */ + 0xC0, /* END_COLLECTION */ +}; + +/* Consumer Control descriptor (3) */ +static const char consumer_descriptor[] = { + 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */ + 0x09, 0x01, /* USAGE (Consumer Control) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x03, /* REPORT_ID = 3 */ + 0x75, 0x10, /* REPORT_SIZE (16) */ + 0x95, 0x02, /* REPORT_COUNT (2) */ + 0x15, 0x01, /* LOGICAL_MIN (1) */ + 0x26, 0xFF, 0x02, /* LOGICAL_MAX (767) */ + 0x19, 0x01, /* USAGE_MIN (1) */ + 0x2A, 0xFF, 0x02, /* USAGE_MAX (767) */ + 0x81, 0x00, /* INPUT (Data Ary Abs) */ + 0xC0, /* END_COLLECTION */ +}; /* */ + +/* System control descriptor (4) */ +static const char syscontrol_descriptor[] = { + 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ + 0x09, 0x80, /* USAGE (System Control) */ + 0xA1, 0x01, /* COLLECTION (Application) */ + 0x85, 0x04, /* REPORT_ID = 4 */ + 0x75, 0x02, /* REPORT_SIZE (2) */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x15, 0x01, /* LOGICAL_MIN (1) */ + 0x25, 0x03, /* LOGICAL_MAX (3) */ + 0x09, 0x82, /* USAGE (System Sleep) */ + 0x09, 0x81, /* USAGE (System Power Down) */ + 0x09, 0x83, /* USAGE (System Wake Up) */ + 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */ + 0x75, 0x06, /* REPORT_SIZE (6) */ + 0x81, 0x03, /* INPUT (Cnst Var Abs) */ + 0xC0, /* END_COLLECTION */ +}; + +/* Media descriptor (8) */ +static const char media_descriptor[] = { + 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */ + 0x09, 0x88, /* Usage 0x0088 */ + 0xa1, 0x01, /* BeginCollection */ + 0x85, 0x08, /* Report ID 8 */ + 0x19, 0x01, /* Usage Min 0x0001 */ + 0x29, 0xff, /* Usage Max 0x00ff */ + 0x15, 0x01, /* Logical Min 1 */ + 0x26, 0xff, 0x00, /* Logical Max 255 */ + 0x75, 0x08, /* Report Size 8 */ + 0x95, 0x01, /* Report Count 1 */ + 0x81, 0x00, /* Input */ + 0xc0, /* EndCollection */ +}; /* */ + +/* HIDPP descriptor */ +static const char hidpp_descriptor[] = { + 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ + 0x09, 0x01, /* Usage (Vendor Usage 1) */ + 0xa1, 0x01, /* Collection (Application) */ + 0x85, 0x10, /* Report ID (16) */ + 0x75, 0x08, /* Report Size (8) */ + 0x95, 0x06, /* Report Count (6) */ + 0x15, 0x00, /* Logical Minimum (0) */ + 0x26, 0xff, 0x00, /* Logical Maximum (255) */ + 0x09, 0x01, /* Usage (Vendor Usage 1) */ + 0x81, 0x00, /* Input (Data,Arr,Abs) */ + 0x09, 0x01, /* Usage (Vendor Usage 1) */ + 0x91, 0x00, /* Output (Data,Arr,Abs) */ + 0xc0, /* End Collection */ + 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ + 0x09, 0x02, /* Usage (Vendor Usage 2) */ + 0xa1, 0x01, /* Collection (Application) */ + 0x85, 0x11, /* Report ID (17) */ + 0x75, 0x08, /* Report Size (8) */ + 0x95, 0x13, /* Report Count (19) */ + 0x15, 0x00, /* Logical Minimum (0) */ + 0x26, 0xff, 0x00, /* Logical Maximum (255) */ + 0x09, 0x02, /* Usage (Vendor Usage 2) */ + 0x81, 0x00, /* Input (Data,Arr,Abs) */ + 0x09, 0x02, /* Usage (Vendor Usage 2) */ + 0x91, 0x00, /* Output (Data,Arr,Abs) */ + 0xc0, /* End Collection */ + 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ + 0x09, 0x04, /* Usage (Vendor Usage 0x04) */ + 0xa1, 0x01, /* Collection (Application) */ + 0x85, 0x20, /* Report ID (32) */ + 0x75, 0x08, /* Report Size (8) */ + 0x95, 0x0e, /* Report Count (14) */ + 0x15, 0x00, /* Logical Minimum (0) */ + 0x26, 0xff, 0x00, /* Logical Maximum (255) */ + 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ + 0x81, 0x00, /* Input (Data,Arr,Abs) */ + 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ + 0x91, 0x00, /* Output (Data,Arr,Abs) */ + 0x85, 0x21, /* Report ID (33) */ + 0x95, 0x1f, /* Report Count (31) */ + 0x15, 0x00, /* Logical Minimum (0) */ + 0x26, 0xff, 0x00, /* Logical Maximum (255) */ + 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ + 0x81, 0x00, /* Input (Data,Arr,Abs) */ + 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ + 0x91, 0x00, /* Output (Data,Arr,Abs) */ + 0xc0, /* End Collection */ +}; + +/* Maximum size of all defined hid reports in bytes (including report id) */ +#define MAX_REPORT_SIZE 8 + +/* Make sure all descriptors are present here */ +#define MAX_RDESC_SIZE \ + (sizeof(kbd_descriptor) + \ + sizeof(mse_bluetooth_descriptor) + \ + sizeof(consumer_descriptor) + \ + sizeof(syscontrol_descriptor) + \ + sizeof(media_descriptor) + \ + sizeof(hidpp_descriptor)) + +/* Number of possible hid report types that can be created by this driver. + * + * Right now, RF report types have the same report types (or report id's) + * than the hid report created from those RF reports. In the future + * this doesnt have to be true. + * + * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds + * to hid report id 0x01, this is standard keyboard. Same thing applies to mice + * reports and consumer control, etc. If a new RF report is created, it doesn't + * has to have the same report id as its corresponding hid report, so an + * translation may have to take place for future report types. + */ +#define NUMBER_OF_HID_REPORTS 32 +static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = { + [1] = 8, /* Standard keyboard */ + [2] = 8, /* Standard mouse */ + [3] = 5, /* Consumer control */ + [4] = 2, /* System control */ + [8] = 2, /* Media Center */ +}; + + +#define LOGITECH_DJ_INTERFACE_NUMBER 0x02 + +static struct hid_ll_driver logi_dj_ll_driver; + +static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev); +static void delayedwork_callback(struct work_struct *work); + +static LIST_HEAD(dj_hdev_list); +static DEFINE_MUTEX(dj_hdev_list_lock); + +/* + * dj/HID++ receivers are really a single logical entity, but for BIOS/Windows + * compatibility they have multiple USB interfaces. On HID++ receivers we need + * to listen for input reports on both interfaces. The functions below are used + * to create a single struct dj_receiver_dev for all interfaces belonging to + * a single USB-device / receiver. + */ +static struct dj_receiver_dev *dj_find_receiver_dev(struct hid_device *hdev, + enum recvr_type type) +{ + struct dj_receiver_dev *djrcv_dev; + char sep; + + /* + * The bluetooth receiver contains a built-in hub and has separate + * USB-devices for the keyboard and mouse interfaces. + */ + sep = (type == recvr_type_bluetooth) ? '.' : '/'; + + /* Try to find an already-probed interface from the same device */ + list_for_each_entry(djrcv_dev, &dj_hdev_list, list) { + if (djrcv_dev->mouse && + hid_compare_device_paths(hdev, djrcv_dev->mouse, sep)) { + kref_get(&djrcv_dev->kref); + return djrcv_dev; + } + if (djrcv_dev->keyboard && + hid_compare_device_paths(hdev, djrcv_dev->keyboard, sep)) { + kref_get(&djrcv_dev->kref); + return djrcv_dev; + } + if (djrcv_dev->hidpp && + hid_compare_device_paths(hdev, djrcv_dev->hidpp, sep)) { + kref_get(&djrcv_dev->kref); + return djrcv_dev; + } + } + + return NULL; +} + +static void dj_release_receiver_dev(struct kref *kref) +{ + struct dj_receiver_dev *djrcv_dev = container_of(kref, struct dj_receiver_dev, kref); + + list_del(&djrcv_dev->list); + kfifo_free(&djrcv_dev->notif_fifo); + kfree(djrcv_dev); +} + +static void dj_put_receiver_dev(struct hid_device *hdev) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + + mutex_lock(&dj_hdev_list_lock); + + if (djrcv_dev->mouse == hdev) + djrcv_dev->mouse = NULL; + if (djrcv_dev->keyboard == hdev) + djrcv_dev->keyboard = NULL; + if (djrcv_dev->hidpp == hdev) + djrcv_dev->hidpp = NULL; + + kref_put(&djrcv_dev->kref, dj_release_receiver_dev); + + mutex_unlock(&dj_hdev_list_lock); +} + +static struct dj_receiver_dev *dj_get_receiver_dev(struct hid_device *hdev, + enum recvr_type type, + unsigned int application, + bool is_hidpp) +{ + struct dj_receiver_dev *djrcv_dev; + + mutex_lock(&dj_hdev_list_lock); + + djrcv_dev = dj_find_receiver_dev(hdev, type); + if (!djrcv_dev) { + djrcv_dev = kzalloc(sizeof(*djrcv_dev), GFP_KERNEL); + if (!djrcv_dev) + goto out; + + INIT_WORK(&djrcv_dev->work, delayedwork_callback); + spin_lock_init(&djrcv_dev->lock); + if (kfifo_alloc(&djrcv_dev->notif_fifo, + DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem), + GFP_KERNEL)) { + kfree(djrcv_dev); + djrcv_dev = NULL; + goto out; + } + kref_init(&djrcv_dev->kref); + list_add_tail(&djrcv_dev->list, &dj_hdev_list); + djrcv_dev->last_query = jiffies; + djrcv_dev->type = type; + } + + if (application == HID_GD_KEYBOARD) + djrcv_dev->keyboard = hdev; + if (application == HID_GD_MOUSE) + djrcv_dev->mouse = hdev; + if (is_hidpp) + djrcv_dev->hidpp = hdev; + + hid_set_drvdata(hdev, djrcv_dev); +out: + mutex_unlock(&dj_hdev_list_lock); + return djrcv_dev; +} + +static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev, + struct dj_workitem *workitem) +{ + /* Called in delayed work context */ + struct dj_device *dj_dev; + unsigned long flags; + + spin_lock_irqsave(&djrcv_dev->lock, flags); + dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index]; + djrcv_dev->paired_dj_devices[workitem->device_index] = NULL; + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + if (dj_dev != NULL) { + hid_destroy_device(dj_dev->hdev); + kfree(dj_dev); + } else { + hid_err(djrcv_dev->hidpp, "%s: can't destroy a NULL device\n", + __func__); + } +} + +static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev, + struct dj_workitem *workitem) +{ + /* Called in delayed work context */ + struct hid_device *djrcv_hdev = djrcv_dev->hidpp; + struct hid_device *dj_hiddev; + struct dj_device *dj_dev; + u8 device_index = workitem->device_index; + unsigned long flags; + + /* Device index goes from 1 to 6, we need 3 bytes to store the + * semicolon, the index, and a null terminator + */ + unsigned char tmpstr[3]; + + /* We are the only one ever adding a device, no need to lock */ + if (djrcv_dev->paired_dj_devices[device_index]) { + /* The device is already known. No need to reallocate it. */ + dbg_hid("%s: device is already known\n", __func__); + return; + } + + dj_hiddev = hid_allocate_device(); + if (IS_ERR(dj_hiddev)) { + hid_err(djrcv_hdev, "%s: hid_allocate_dev failed\n", __func__); + return; + } + + dj_hiddev->ll_driver = &logi_dj_ll_driver; + + dj_hiddev->dev.parent = &djrcv_hdev->dev; + dj_hiddev->bus = BUS_USB; + dj_hiddev->vendor = djrcv_hdev->vendor; + dj_hiddev->product = (workitem->quad_id_msb << 8) | + workitem->quad_id_lsb; + if (workitem->device_type) { + const char *type_str = "Device"; + + switch (workitem->device_type) { + case 0x01: type_str = "Keyboard"; break; + case 0x02: type_str = "Mouse"; break; + case 0x03: type_str = "Numpad"; break; + case 0x04: type_str = "Presenter"; break; + case 0x07: type_str = "Remote Control"; break; + case 0x08: type_str = "Trackball"; break; + case 0x09: type_str = "Touchpad"; break; + } + snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), + "Logitech Wireless %s PID:%04x", + type_str, dj_hiddev->product); + } else { + snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), + "Logitech Wireless Device PID:%04x", + dj_hiddev->product); + } + + if (djrcv_dev->type == recvr_type_27mhz) + dj_hiddev->group = HID_GROUP_LOGITECH_27MHZ_DEVICE; + else + dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE; + + memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys)); + snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index); + strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys)); + + dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL); + + if (!dj_dev) { + hid_err(djrcv_hdev, "%s: failed allocating dj_dev\n", __func__); + goto dj_device_allocate_fail; + } + + dj_dev->reports_supported = workitem->reports_supported; + dj_dev->hdev = dj_hiddev; + dj_dev->dj_receiver_dev = djrcv_dev; + dj_dev->device_index = device_index; + dj_hiddev->driver_data = dj_dev; + + spin_lock_irqsave(&djrcv_dev->lock, flags); + djrcv_dev->paired_dj_devices[device_index] = dj_dev; + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + if (hid_add_device(dj_hiddev)) { + hid_err(djrcv_hdev, "%s: failed adding dj_device\n", __func__); + goto hid_add_device_fail; + } + + return; + +hid_add_device_fail: + spin_lock_irqsave(&djrcv_dev->lock, flags); + djrcv_dev->paired_dj_devices[device_index] = NULL; + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + kfree(dj_dev); +dj_device_allocate_fail: + hid_destroy_device(dj_hiddev); +} + +static void delayedwork_callback(struct work_struct *work) +{ + struct dj_receiver_dev *djrcv_dev = + container_of(work, struct dj_receiver_dev, work); + + struct dj_workitem workitem; + unsigned long flags; + int count; + int retval; + + dbg_hid("%s\n", __func__); + + spin_lock_irqsave(&djrcv_dev->lock, flags); + + /* + * Since we attach to multiple interfaces, we may get scheduled before + * we are bound to the HID++ interface, catch this. + */ + if (!djrcv_dev->ready) { + pr_warn("%s: delayedwork queued before hidpp interface was enumerated\n", + __func__); + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + return; + } + + count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); + + if (count != sizeof(workitem)) { + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + return; + } + + if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) + schedule_work(&djrcv_dev->work); + + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + switch (workitem.type) { + case WORKITEM_TYPE_PAIRED: + logi_dj_recv_add_djhid_device(djrcv_dev, &workitem); + break; + case WORKITEM_TYPE_UNPAIRED: + logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem); + break; + case WORKITEM_TYPE_UNKNOWN: + retval = logi_dj_recv_query_paired_devices(djrcv_dev); + if (retval) { + hid_err(djrcv_dev->hidpp, "%s: logi_dj_recv_query_paired_devices error: %d\n", + __func__, retval); + } + break; + case WORKITEM_TYPE_EMPTY: + dbg_hid("%s: device list is empty\n", __func__); + break; + } +} + +/* + * Sometimes we receive reports for which we do not have a paired dj_device + * associated with the device_index or report-type to forward the report to. + * This means that the original "device paired" notification corresponding + * to the dj_device never arrived to this driver. Possible reasons for this are: + * 1) hid-core discards all packets coming from a device during probe(). + * 2) if the receiver is plugged into a KVM switch then the pairing reports + * are only forwarded to it if the focus is on this PC. + * This function deals with this by re-asking the receiver for the list of + * connected devices in the delayed work callback. + * This function MUST be called with djrcv->lock held. + */ +static void logi_dj_recv_queue_unknown_work(struct dj_receiver_dev *djrcv_dev) +{ + struct dj_workitem workitem = { .type = WORKITEM_TYPE_UNKNOWN }; + + /* Rate limit queries done because of unhandled reports to 2/sec */ + if (time_before(jiffies, djrcv_dev->last_query + HZ / 2)) + return; + + kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); + schedule_work(&djrcv_dev->work); +} + +static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev, + struct dj_report *dj_report) +{ + /* We are called from atomic context (tasklet && djrcv->lock held) */ + struct dj_workitem workitem = { + .device_index = dj_report->device_index, + }; + + switch (dj_report->report_type) { + case REPORT_TYPE_NOTIF_DEVICE_PAIRED: + workitem.type = WORKITEM_TYPE_PAIRED; + if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] & + SPFUNCTION_DEVICE_LIST_EMPTY) { + workitem.type = WORKITEM_TYPE_EMPTY; + break; + } + fallthrough; + case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: + workitem.quad_id_msb = + dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB]; + workitem.quad_id_lsb = + dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB]; + workitem.reports_supported = get_unaligned_le32( + dj_report->report_params + + DEVICE_PAIRED_RF_REPORT_TYPE); + workitem.reports_supported |= HIDPP; + if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED) + workitem.type = WORKITEM_TYPE_UNPAIRED; + break; + default: + logi_dj_recv_queue_unknown_work(djrcv_dev); + return; + } + + kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); + schedule_work(&djrcv_dev->work); +} + +/* + * Some quad/bluetooth keyboards have a builtin touchpad in this case we see + * only 1 paired device with a device_type of REPORT_TYPE_KEYBOARD. For the + * touchpad to work we must also forward mouse input reports to the dj_hiddev + * created for the keyboard (instead of forwarding them to a second paired + * device with a device_type of REPORT_TYPE_MOUSE as we normally would). + */ +static const u16 kbd_builtin_touchpad_ids[] = { + 0xb309, /* Dinovo Edge */ + 0xb30c, /* Dinovo Mini */ +}; + +static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev, + struct hidpp_event *hidpp_report, + struct dj_workitem *workitem) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + int i, id; + + workitem->type = WORKITEM_TYPE_PAIRED; + workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & + HIDPP_DEVICE_TYPE_MASK; + workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB]; + workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB]; + switch (workitem->device_type) { + case REPORT_TYPE_KEYBOARD: + workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA | + POWER_KEYS | MEDIA_CENTER | + HIDPP; + id = (workitem->quad_id_msb << 8) | workitem->quad_id_lsb; + for (i = 0; i < ARRAY_SIZE(kbd_builtin_touchpad_ids); i++) { + if (id == kbd_builtin_touchpad_ids[i]) { + workitem->reports_supported |= STD_MOUSE; + break; + } + } + break; + case REPORT_TYPE_MOUSE: + workitem->reports_supported |= STD_MOUSE | HIDPP; + if (djrcv_dev->type == recvr_type_mouse_only) + workitem->reports_supported |= MULTIMEDIA; + break; + } +} + +static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev, + struct hidpp_event *hidpp_report, + struct dj_workitem *workitem) +{ + workitem->type = WORKITEM_TYPE_PAIRED; + workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID]; + switch (hidpp_report->device_index) { + case 1: /* Index 1 is always a mouse */ + case 2: /* Index 2 is always a mouse */ + workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE; + workitem->reports_supported |= STD_MOUSE | HIDPP; + break; + case 3: /* Index 3 is always the keyboard */ + case 4: /* Index 4 is used for an optional separate numpad */ + workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD; + workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA | + POWER_KEYS | HIDPP; + break; + default: + hid_warn(hdev, "%s: unexpected device-index %d", __func__, + hidpp_report->device_index); + } +} + +static void logi_hidpp_recv_queue_notif(struct hid_device *hdev, + struct hidpp_event *hidpp_report) +{ + /* We are called from atomic context (tasklet && djrcv->lock held) */ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + const char *device_type = "UNKNOWN"; + struct dj_workitem workitem = { + .type = WORKITEM_TYPE_EMPTY, + .device_index = hidpp_report->device_index, + }; + + switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) { + case 0x01: + device_type = "Bluetooth"; + /* Bluetooth connect packet contents is the same as (e)QUAD */ + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & + HIDPP_MANUFACTURER_MASK)) { + hid_info(hdev, "Non Logitech device connected on slot %d\n", + hidpp_report->device_index); + workitem.reports_supported &= ~HIDPP; + } + break; + case 0x02: + device_type = "27 Mhz"; + logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem); + break; + case 0x03: + device_type = "QUAD or eQUAD"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + break; + case 0x04: + device_type = "eQUAD step 4 DJ"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + break; + case 0x05: + device_type = "DFU Lite"; + break; + case 0x06: + device_type = "eQUAD step 4 Lite"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + break; + case 0x07: + device_type = "eQUAD step 4 Gaming"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + workitem.reports_supported |= STD_KEYBOARD; + break; + case 0x08: + device_type = "eQUAD step 4 for gamepads"; + break; + case 0x0a: + device_type = "eQUAD nano Lite"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + break; + case 0x0c: + device_type = "eQUAD Lightspeed 1"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + workitem.reports_supported |= STD_KEYBOARD; + break; + case 0x0d: + device_type = "eQUAD Lightspeed 1.1"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + workitem.reports_supported |= STD_KEYBOARD; + break; + case 0x0f: + case 0x11: + device_type = "eQUAD Lightspeed 1.2"; + logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); + workitem.reports_supported |= STD_KEYBOARD; + break; + } + + /* custom receiver device (eg. powerplay) */ + if (hidpp_report->device_index == 7) { + workitem.reports_supported |= HIDPP; + } + + if (workitem.type == WORKITEM_TYPE_EMPTY) { + hid_warn(hdev, + "unusable device of type %s (0x%02x) connected on slot %d", + device_type, + hidpp_report->params[HIDPP_PARAM_PROTO_TYPE], + hidpp_report->device_index); + return; + } + + hid_info(hdev, "device of type %s (0x%02x) connected on slot %d", + device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE], + hidpp_report->device_index); + + kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); + schedule_work(&djrcv_dev->work); +} + +static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev, + struct dj_report *dj_report) +{ + /* We are called from atomic context (tasklet && djrcv->lock held) */ + unsigned int i; + u8 reportbuffer[MAX_REPORT_SIZE]; + struct dj_device *djdev; + + djdev = djrcv_dev->paired_dj_devices[dj_report->device_index]; + + memset(reportbuffer, 0, sizeof(reportbuffer)); + + for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) { + if (djdev->reports_supported & (1 << i)) { + reportbuffer[0] = i; + if (hid_input_report(djdev->hdev, + HID_INPUT_REPORT, + reportbuffer, + hid_reportid_size_map[i], 1)) { + dbg_hid("hid_input_report error sending null " + "report\n"); + } + } + } +} + +static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev, + struct dj_report *dj_report) +{ + /* We are called from atomic context (tasklet && djrcv->lock held) */ + struct dj_device *dj_device; + + dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index]; + + if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) || + (hid_reportid_size_map[dj_report->report_type] == 0)) { + dbg_hid("invalid report type:%x\n", dj_report->report_type); + return; + } + + if (hid_input_report(dj_device->hdev, + HID_INPUT_REPORT, &dj_report->report_type, + hid_reportid_size_map[dj_report->report_type], 1)) { + dbg_hid("hid_input_report error\n"); + } +} + +static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data, + int size) +{ + /* We are called from atomic context (tasklet && djrcv->lock held) */ + if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1)) + dbg_hid("hid_input_report error\n"); +} + +static void logi_dj_recv_forward_input_report(struct hid_device *hdev, + u8 *data, int size) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + struct dj_device *dj_dev; + unsigned long flags; + u8 report = data[0]; + int i; + + if (report > REPORT_TYPE_RFREPORT_LAST) { + hid_err(hdev, "Unexpected input report number %d\n", report); + return; + } + + spin_lock_irqsave(&djrcv_dev->lock, flags); + for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { + dj_dev = djrcv_dev->paired_dj_devices[i]; + if (dj_dev && (dj_dev->reports_supported & BIT(report))) { + logi_dj_recv_forward_report(dj_dev, data, size); + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + return; + } + } + + logi_dj_recv_queue_unknown_work(djrcv_dev); + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + dbg_hid("No dj-devs handling input report number %d\n", report); +} + +static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, + struct dj_report *dj_report) +{ + struct hid_device *hdev = djrcv_dev->hidpp; + struct hid_report *report; + struct hid_report_enum *output_report_enum; + u8 *data = (u8 *)(&dj_report->device_index); + unsigned int i; + + output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT]; + report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT]; + + if (!report) { + hid_err(hdev, "%s: unable to find dj report\n", __func__); + return -ENODEV; + } + + for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++) + report->field[0]->value[i] = data[i]; + + hid_hw_request(hdev, report, HID_REQ_SET_REPORT); + + return 0; +} + +static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev) +{ + static const u8 template[] = { + REPORT_ID_HIDPP_SHORT, + HIDPP_RECEIVER_INDEX, + HIDPP_SET_REGISTER, + HIDPP_REG_CONNECTION_STATE, + HIDPP_FAKE_DEVICE_ARRIVAL, + 0x00, 0x00 + }; + u8 *hidpp_report; + int retval; + + hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL); + if (!hidpp_report) + return -ENOMEM; + + retval = hid_hw_raw_request(djrcv_dev->hidpp, + REPORT_ID_HIDPP_SHORT, + hidpp_report, sizeof(template), + HID_OUTPUT_REPORT, + HID_REQ_SET_REPORT); + + kfree(hidpp_report); + return (retval < 0) ? retval : 0; +} + +static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev) +{ + struct dj_report *dj_report; + int retval; + + djrcv_dev->last_query = jiffies; + + if (djrcv_dev->type != recvr_type_dj) + return logi_dj_recv_query_hidpp_devices(djrcv_dev); + + dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); + if (!dj_report) + return -ENOMEM; + dj_report->report_id = REPORT_ID_DJ_SHORT; + dj_report->device_index = HIDPP_RECEIVER_INDEX; + dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES; + retval = logi_dj_recv_send_report(djrcv_dev, dj_report); + kfree(dj_report); + return retval; +} + + +static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev, + unsigned timeout) +{ + struct hid_device *hdev = djrcv_dev->hidpp; + struct dj_report *dj_report; + u8 *buf; + int retval = 0; + + dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); + if (!dj_report) + return -ENOMEM; + + if (djrcv_dev->type == recvr_type_dj) { + dj_report->report_id = REPORT_ID_DJ_SHORT; + dj_report->device_index = HIDPP_RECEIVER_INDEX; + dj_report->report_type = REPORT_TYPE_CMD_SWITCH; + dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F; + dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = + (u8)timeout; + + retval = logi_dj_recv_send_report(djrcv_dev, dj_report); + + /* + * Ugly sleep to work around a USB 3.0 bug when the receiver is + * still processing the "switch-to-dj" command while we send an + * other command. + * 50 msec should gives enough time to the receiver to be ready. + */ + msleep(50); + + if (retval) + return retval; + } + + /* + * Magical bits to set up hidpp notifications when the dj devices + * are connected/disconnected. + * + * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller + * than DJREPORT_SHORT_LENGTH. + */ + buf = (u8 *)dj_report; + + memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH); + + buf[0] = REPORT_ID_HIDPP_SHORT; + buf[1] = HIDPP_RECEIVER_INDEX; + buf[2] = 0x80; + buf[3] = 0x00; + buf[4] = 0x00; + buf[5] = 0x09; + buf[6] = 0x00; + + retval = hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf, + HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT, + HID_REQ_SET_REPORT); + + kfree(dj_report); + return retval; +} + + +static int logi_dj_ll_open(struct hid_device *hid) +{ + dbg_hid("%s: %s\n", __func__, hid->phys); + return 0; + +} + +static void logi_dj_ll_close(struct hid_device *hid) +{ + dbg_hid("%s: %s\n", __func__, hid->phys); +} + +/* + * Register 0xB5 is "pairing information". It is solely intended for the + * receiver, so do not overwrite the device index. + */ +static u8 unifying_pairing_query[] = { REPORT_ID_HIDPP_SHORT, + HIDPP_RECEIVER_INDEX, + HIDPP_GET_LONG_REGISTER, + HIDPP_REG_PAIRING_INFORMATION }; +static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG, + HIDPP_RECEIVER_INDEX, + HIDPP_GET_LONG_REGISTER, + HIDPP_REG_PAIRING_INFORMATION }; + +static int logi_dj_ll_raw_request(struct hid_device *hid, + unsigned char reportnum, __u8 *buf, + size_t count, unsigned char report_type, + int reqtype) +{ + struct dj_device *djdev = hid->driver_data; + struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev; + u8 *out_buf; + int ret; + + if ((buf[0] == REPORT_ID_HIDPP_SHORT) || + (buf[0] == REPORT_ID_HIDPP_LONG) || + (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) { + if (count < 2) + return -EINVAL; + + /* special case where we should not overwrite + * the device_index */ + if (count == 7 && !memcmp(buf, unifying_pairing_query, + sizeof(unifying_pairing_query))) + buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1); + else + buf[1] = djdev->device_index; + return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf, + count, report_type, reqtype); + } + + if (buf[0] != REPORT_TYPE_LEDS) + return -EINVAL; + + if (djrcv_dev->type != recvr_type_dj && count >= 2) { + if (!djrcv_dev->keyboard) { + hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n"); + return 0; + } + /* usbhid overrides the report ID and ignores the first byte */ + return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count, + report_type, reqtype); + } + + out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC); + if (!out_buf) + return -ENOMEM; + + if (count > DJREPORT_SHORT_LENGTH - 2) + count = DJREPORT_SHORT_LENGTH - 2; + + out_buf[0] = REPORT_ID_DJ_SHORT; + out_buf[1] = djdev->device_index; + memcpy(out_buf + 2, buf, count); + + ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf, + DJREPORT_SHORT_LENGTH, report_type, reqtype); + + kfree(out_buf); + return ret; +} + +static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size) +{ + memcpy(rdesc + *rsize, data, size); + *rsize += size; +} + +static int logi_dj_ll_parse(struct hid_device *hid) +{ + struct dj_device *djdev = hid->driver_data; + unsigned int rsize = 0; + char *rdesc; + int retval; + + dbg_hid("%s\n", __func__); + + djdev->hdev->version = 0x0111; + djdev->hdev->country = 0x00; + + rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL); + if (!rdesc) + return -ENOMEM; + + if (djdev->reports_supported & STD_KEYBOARD) { + dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n", + __func__, djdev->reports_supported); + rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor)); + } + + if (djdev->reports_supported & STD_MOUSE) { + dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n", + __func__, djdev->reports_supported); + if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp || + djdev->dj_receiver_dev->type == recvr_type_mouse_only) + rdcat(rdesc, &rsize, mse_high_res_descriptor, + sizeof(mse_high_res_descriptor)); + else if (djdev->dj_receiver_dev->type == recvr_type_27mhz) + rdcat(rdesc, &rsize, mse_27mhz_descriptor, + sizeof(mse_27mhz_descriptor)); + else if (djdev->dj_receiver_dev->type == recvr_type_bluetooth) + rdcat(rdesc, &rsize, mse_bluetooth_descriptor, + sizeof(mse_bluetooth_descriptor)); + else + rdcat(rdesc, &rsize, mse_descriptor, + sizeof(mse_descriptor)); + } + + if (djdev->reports_supported & MULTIMEDIA) { + dbg_hid("%s: sending a multimedia report descriptor: %llx\n", + __func__, djdev->reports_supported); + rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor)); + } + + if (djdev->reports_supported & POWER_KEYS) { + dbg_hid("%s: sending a power keys report descriptor: %llx\n", + __func__, djdev->reports_supported); + rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor)); + } + + if (djdev->reports_supported & MEDIA_CENTER) { + dbg_hid("%s: sending a media center report descriptor: %llx\n", + __func__, djdev->reports_supported); + rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor)); + } + + if (djdev->reports_supported & KBD_LEDS) { + dbg_hid("%s: need to send kbd leds report descriptor: %llx\n", + __func__, djdev->reports_supported); + } + + if (djdev->reports_supported & HIDPP) { + dbg_hid("%s: sending a HID++ descriptor, reports_supported: %llx\n", + __func__, djdev->reports_supported); + rdcat(rdesc, &rsize, hidpp_descriptor, + sizeof(hidpp_descriptor)); + } + + retval = hid_parse_report(hid, rdesc, rsize); + kfree(rdesc); + + return retval; +} + +static int logi_dj_ll_start(struct hid_device *hid) +{ + dbg_hid("%s\n", __func__); + return 0; +} + +static void logi_dj_ll_stop(struct hid_device *hid) +{ + dbg_hid("%s\n", __func__); +} + + +static struct hid_ll_driver logi_dj_ll_driver = { + .parse = logi_dj_ll_parse, + .start = logi_dj_ll_start, + .stop = logi_dj_ll_stop, + .open = logi_dj_ll_open, + .close = logi_dj_ll_close, + .raw_request = logi_dj_ll_raw_request, +}; + +static int logi_dj_dj_event(struct hid_device *hdev, + struct hid_report *report, u8 *data, + int size) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + struct dj_report *dj_report = (struct dj_report *) data; + unsigned long flags; + + /* + * Here we receive all data coming from iface 2, there are 3 cases: + * + * 1) Data is intended for this driver i. e. data contains arrival, + * departure, etc notifications, in which case we queue them for delayed + * processing by the work queue. We return 1 to hid-core as no further + * processing is required from it. + * + * 2) Data informs a connection change, if the change means rf link + * loss, then we must send a null report to the upper layer to discard + * potentially pressed keys that may be repeated forever by the input + * layer. Return 1 to hid-core as no further processing is required. + * + * 3) Data is an actual input event from a paired DJ device in which + * case we forward it to the correct hid device (via hid_input_report() + * ) and return 1 so hid-core does not anything else with it. + */ + + if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) || + (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) { + /* + * Device index is wrong, bail out. + * This driver can ignore safely the receiver notifications, + * so ignore those reports too. + */ + if (dj_report->device_index != DJ_RECEIVER_INDEX) + hid_err(hdev, "%s: invalid device index:%d\n", + __func__, dj_report->device_index); + return false; + } + + spin_lock_irqsave(&djrcv_dev->lock, flags); + + if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) { + /* received an event for an unknown device, bail out */ + logi_dj_recv_queue_notification(djrcv_dev, dj_report); + goto out; + } + + switch (dj_report->report_type) { + case REPORT_TYPE_NOTIF_DEVICE_PAIRED: + /* pairing notifications are handled above the switch */ + break; + case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: + logi_dj_recv_queue_notification(djrcv_dev, dj_report); + break; + case REPORT_TYPE_NOTIF_CONNECTION_STATUS: + if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] == + STATUS_LINKLOSS) { + logi_dj_recv_forward_null_report(djrcv_dev, dj_report); + } + break; + default: + logi_dj_recv_forward_dj(djrcv_dev, dj_report); + } + +out: + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + return true; +} + +static int logi_dj_hidpp_event(struct hid_device *hdev, + struct hid_report *report, u8 *data, + int size) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + struct hidpp_event *hidpp_report = (struct hidpp_event *) data; + struct dj_device *dj_dev; + unsigned long flags; + u8 device_index = hidpp_report->device_index; + + if (device_index == HIDPP_RECEIVER_INDEX) { + /* special case were the device wants to know its unifying + * name */ + if (size == HIDPP_REPORT_LONG_LENGTH && + !memcmp(data, unifying_pairing_answer, + sizeof(unifying_pairing_answer))) + device_index = (data[4] & 0x0F) + 1; + else + return false; + } + + /* + * Data is from the HID++ collection, in this case, we forward the + * data to the corresponding child dj device and return 0 to hid-core + * so he data also goes to the hidraw device of the receiver. This + * allows a user space application to implement the full HID++ routing + * via the receiver. + */ + + if ((device_index < DJ_DEVICE_INDEX_MIN) || + (device_index > DJ_DEVICE_INDEX_MAX)) { + /* + * Device index is wrong, bail out. + * This driver can ignore safely the receiver notifications, + * so ignore those reports too. + */ + hid_err(hdev, "%s: invalid device index:%d\n", __func__, + hidpp_report->device_index); + return false; + } + + spin_lock_irqsave(&djrcv_dev->lock, flags); + + dj_dev = djrcv_dev->paired_dj_devices[device_index]; + + /* + * With 27 MHz receivers, we do not get an explicit unpair event, + * remove the old device if the user has paired a *different* device. + */ + if (djrcv_dev->type == recvr_type_27mhz && dj_dev && + hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED && + hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 && + hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] != + dj_dev->hdev->product) { + struct dj_workitem workitem = { + .device_index = hidpp_report->device_index, + .type = WORKITEM_TYPE_UNPAIRED, + }; + kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); + /* logi_hidpp_recv_queue_notif will queue the work */ + dj_dev = NULL; + } + + if (dj_dev) { + logi_dj_recv_forward_report(dj_dev, data, size); + } else { + if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED) + logi_hidpp_recv_queue_notif(hdev, hidpp_report); + else + logi_dj_recv_queue_unknown_work(djrcv_dev); + } + + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + return false; +} + +static int logi_dj_raw_event(struct hid_device *hdev, + struct hid_report *report, u8 *data, + int size) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + dbg_hid("%s, size:%d\n", __func__, size); + + if (!djrcv_dev) + return 0; + + if (!hdev->report_enum[HID_INPUT_REPORT].numbered) { + + if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) { + /* + * For the keyboard, we can reuse the same report by + * using the second byte which is constant in the USB + * HID report descriptor. + */ + data[1] = data[0]; + data[0] = REPORT_TYPE_KEYBOARD; + + logi_dj_recv_forward_input_report(hdev, data, size); + + /* restore previous state */ + data[0] = data[1]; + data[1] = 0; + } + /* + * Mouse-only receivers send unnumbered mouse data. The 27 MHz + * receiver uses 6 byte packets, the nano receiver 8 bytes. + */ + if (djrcv_dev->unnumbered_application == HID_GD_MOUSE && + size <= 8) { + u8 mouse_report[9]; + + /* Prepend report id */ + mouse_report[0] = REPORT_TYPE_MOUSE; + memcpy(mouse_report + 1, data, size); + logi_dj_recv_forward_input_report(hdev, mouse_report, + size + 1); + } + + return false; + } + + switch (data[0]) { + case REPORT_ID_DJ_SHORT: + if (size != DJREPORT_SHORT_LENGTH) { + hid_err(hdev, "Short DJ report bad size (%d)", size); + return false; + } + return logi_dj_dj_event(hdev, report, data, size); + case REPORT_ID_DJ_LONG: + if (size != DJREPORT_LONG_LENGTH) { + hid_err(hdev, "Long DJ report bad size (%d)", size); + return false; + } + return logi_dj_dj_event(hdev, report, data, size); + case REPORT_ID_HIDPP_SHORT: + if (size != HIDPP_REPORT_SHORT_LENGTH) { + hid_err(hdev, "Short HID++ report bad size (%d)", size); + return false; + } + return logi_dj_hidpp_event(hdev, report, data, size); + case REPORT_ID_HIDPP_LONG: + if (size != HIDPP_REPORT_LONG_LENGTH) { + hid_err(hdev, "Long HID++ report bad size (%d)", size); + return false; + } + return logi_dj_hidpp_event(hdev, report, data, size); + } + + logi_dj_recv_forward_input_report(hdev, data, size); + + return false; +} + +static int logi_dj_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + struct hid_report_enum *rep_enum; + struct hid_report *rep; + struct dj_receiver_dev *djrcv_dev; + struct usb_interface *intf; + unsigned int no_dj_interfaces = 0; + bool has_hidpp = false; + unsigned long flags; + int retval; + + /* + * Call to usbhid to fetch the HID descriptors of the current + * interface subsequently call to the hid/hid-core to parse the + * fetched descriptors. + */ + retval = hid_parse(hdev); + if (retval) { + hid_err(hdev, "%s: parse failed\n", __func__); + return retval; + } + + /* + * Some KVMs add an extra interface for e.g. mouse emulation. If we + * treat these as logitech-dj interfaces then this causes input events + * reported through this extra interface to not be reported correctly. + * To avoid this, we treat these as generic-hid devices. + */ + switch (id->driver_data) { + case recvr_type_dj: no_dj_interfaces = 3; break; + case recvr_type_hidpp: no_dj_interfaces = 2; break; + case recvr_type_gaming_hidpp: no_dj_interfaces = 3; break; + case recvr_type_mouse_only: no_dj_interfaces = 2; break; + case recvr_type_27mhz: no_dj_interfaces = 2; break; + case recvr_type_bluetooth: no_dj_interfaces = 2; break; + } + if (hid_is_usb(hdev)) { + intf = to_usb_interface(hdev->dev.parent); + if (intf && intf->altsetting->desc.bInterfaceNumber >= + no_dj_interfaces) { + hdev->quirks |= HID_QUIRK_INPUT_PER_APP; + return hid_hw_start(hdev, HID_CONNECT_DEFAULT); + } + } + + rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; + + /* no input reports, bail out */ + if (list_empty(&rep_enum->report_list)) + return -ENODEV; + + /* + * Check for the HID++ application. + * Note: we should theoretically check for HID++ and DJ + * collections, but this will do. + */ + list_for_each_entry(rep, &rep_enum->report_list, list) { + if (rep->application == 0xff000001) + has_hidpp = true; + } + + /* + * Ignore interfaces without DJ/HID++ collection, they will not carry + * any data, dont create any hid_device for them. + */ + if (!has_hidpp && id->driver_data == recvr_type_dj) + return -ENODEV; + + /* get the current application attached to the node */ + rep = list_first_entry(&rep_enum->report_list, struct hid_report, list); + djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data, + rep->application, has_hidpp); + if (!djrcv_dev) { + hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__); + return -ENOMEM; + } + + if (!rep_enum->numbered) + djrcv_dev->unnumbered_application = rep->application; + + /* Starts the usb device and connects to upper interfaces hiddev and + * hidraw */ + retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV); + if (retval) { + hid_err(hdev, "%s: hid_hw_start returned error\n", __func__); + goto hid_hw_start_fail; + } + + if (has_hidpp) { + retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); + if (retval < 0) { + hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n", + __func__, retval); + goto switch_to_dj_mode_fail; + } + } + + /* This is enabling the polling urb on the IN endpoint */ + retval = hid_hw_open(hdev); + if (retval < 0) { + hid_err(hdev, "%s: hid_hw_open returned error:%d\n", + __func__, retval); + goto llopen_failed; + } + + /* Allow incoming packets to arrive: */ + hid_device_io_start(hdev); + + if (has_hidpp) { + spin_lock_irqsave(&djrcv_dev->lock, flags); + djrcv_dev->ready = true; + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + retval = logi_dj_recv_query_paired_devices(djrcv_dev); + if (retval < 0) { + hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n", + __func__, retval); + /* + * This can happen with a KVM, let the probe succeed, + * logi_dj_recv_queue_unknown_work will retry later. + */ + } + } + + return 0; + +llopen_failed: +switch_to_dj_mode_fail: + hid_hw_stop(hdev); + +hid_hw_start_fail: + dj_put_receiver_dev(hdev); + return retval; +} + +#ifdef CONFIG_PM +static int logi_dj_reset_resume(struct hid_device *hdev) +{ + int retval; + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + + if (!djrcv_dev || djrcv_dev->hidpp != hdev) + return 0; + + retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); + if (retval < 0) { + hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n", + __func__, retval); + } + + return 0; +} +#endif + +static void logi_dj_remove(struct hid_device *hdev) +{ + struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); + struct dj_device *dj_dev; + unsigned long flags; + int i; + + dbg_hid("%s\n", __func__); + + if (!djrcv_dev) + return hid_hw_stop(hdev); + + /* + * This ensures that if the work gets requeued from another + * interface of the same receiver it will be a no-op. + */ + spin_lock_irqsave(&djrcv_dev->lock, flags); + djrcv_dev->ready = false; + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + + cancel_work_sync(&djrcv_dev->work); + + hid_hw_close(hdev); + hid_hw_stop(hdev); + + /* + * For proper operation we need access to all interfaces, so we destroy + * the paired devices when we're unbound from any interface. + * + * Note we may still be bound to other interfaces, sharing the same + * djrcv_dev, so we need locking here. + */ + for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { + spin_lock_irqsave(&djrcv_dev->lock, flags); + dj_dev = djrcv_dev->paired_dj_devices[i]; + djrcv_dev->paired_dj_devices[i] = NULL; + spin_unlock_irqrestore(&djrcv_dev->lock, flags); + if (dj_dev != NULL) { + hid_destroy_device(dj_dev->hdev); + kfree(dj_dev); + } + } + + dj_put_receiver_dev(hdev); +} + +static const struct hid_device_id logi_dj_receivers[] = { + {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER), + .driver_data = recvr_type_dj}, + {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2), + .driver_data = recvr_type_dj}, + { /* Logitech Nano mouse only receiver */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_NANO_RECEIVER), + .driver_data = recvr_type_mouse_only}, + { /* Logitech Nano (non DJ) receiver */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2), + .driver_data = recvr_type_hidpp}, + { /* Logitech G700(s) receiver (0xc531) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + 0xc531), + .driver_data = recvr_type_gaming_hidpp}, + { /* Logitech G602 receiver (0xc537) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + 0xc537), + .driver_data = recvr_type_gaming_hidpp}, + { /* Logitech lightspeed receiver (0xc539) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1), + .driver_data = recvr_type_gaming_hidpp}, + { /* Logitech lightspeed receiver (0xc53f) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1_1), + .driver_data = recvr_type_gaming_hidpp}, + { /* Logitech 27 MHz HID++ 1.0 receiver (0xc513) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER), + .driver_data = recvr_type_27mhz}, + { /* Logitech powerplay receiver (0xc53a) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY), + .driver_data = recvr_type_gaming_hidpp}, + { /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_S510_RECEIVER_2), + .driver_data = recvr_type_27mhz}, + { /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER), + .driver_data = recvr_type_27mhz}, + { /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + 0xc70e), + .driver_data = recvr_type_bluetooth}, + { /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + 0xc70a), + .driver_data = recvr_type_bluetooth}, + { /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + 0xc71b), + .driver_data = recvr_type_bluetooth}, + { /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. */ + HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, + 0xc71c), + .driver_data = recvr_type_bluetooth}, + {} +}; + +MODULE_DEVICE_TABLE(hid, logi_dj_receivers); + +static struct hid_driver logi_djreceiver_driver = { + .name = "logitech-djreceiver", + .id_table = logi_dj_receivers, + .probe = logi_dj_probe, + .remove = logi_dj_remove, + .raw_event = logi_dj_raw_event, +#ifdef CONFIG_PM + .reset_resume = logi_dj_reset_resume, +#endif +}; + +module_hid_driver(logi_djreceiver_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Logitech"); +MODULE_AUTHOR("Nestor Lopez Casado"); +MODULE_AUTHOR("nlopezcasad@logitech.com"); |