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-rw-r--r--drivers/hid/hid-logitech-dj.c2053
1 files changed, 2053 insertions, 0 deletions
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
new file mode 100644
index 0000000000..e6a8b6d8ea
--- /dev/null
+++ b/drivers/hid/hid-logitech-dj.c
@@ -0,0 +1,2053 @@
+// 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 KBD_MOUSE BIT(5)
+#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_27MHZ_SECURE_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,
+ recvr_type_dinovo,
+};
+
+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 */
+};
+
+/* Mouse descriptor (5) for Bluetooth receiver, normal-res hwheel, 8 buttons */
+static const char mse5_bluetooth_descriptor[] = {
+ 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
+ 0x09, 0x02, /* Usage (Mouse) */
+ 0xa1, 0x01, /* Collection (Application) */
+ 0x85, 0x05, /* Report ID (5) */
+ 0x09, 0x01, /* Usage (Pointer) */
+ 0xa1, 0x00, /* Collection (Physical) */
+ 0x05, 0x09, /* Usage Page (Button) */
+ 0x19, 0x01, /* Usage Minimum (1) */
+ 0x29, 0x08, /* Usage Maximum (8) */
+ 0x15, 0x00, /* Logical Minimum (0) */
+ 0x25, 0x01, /* Logical Maximum (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 Minimum (-2047) */
+ 0x26, 0xff, 0x07, /* Logical Maximum (2047) */
+ 0x75, 0x0c, /* Report Size (12) */
+ 0x95, 0x02, /* Report Count (2) */
+ 0x09, 0x30, /* Usage (X) */
+ 0x09, 0x31, /* Usage (Y) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x15, 0x81, /* Logical Minimum (-127) */
+ 0x25, 0x7f, /* Logical Maximum (127) */
+ 0x75, 0x08, /* Report Size (8) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x09, 0x38, /* Usage (Wheel) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 0x05, 0x0c, /* Usage Page (Consumer Devices) */
+ 0x0a, 0x38, 0x02, /* Usage (AC Pan) */
+ 0x15, 0x81, /* Logical Minimum (-127) */
+ 0x25, 0x7f, /* Logical Maximum (127) */
+ 0x75, 0x08, /* Report Size (8) */
+ 0x95, 0x01, /* Report Count (1) */
+ 0x81, 0x06, /* Input (Data,Var,Rel) */
+ 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(mse5_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 const 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);
+
+static bool recvr_type_is_bluetooth(enum recvr_type type)
+{
+ return type == recvr_type_bluetooth || type == recvr_type_dinovo;
+}
+
+/*
+ * 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 = recvr_type_is_bluetooth(type) ? '.' : '/';
+
+ /* 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).
+ *
+ * On Dinovo receivers the keyboard's touchpad and an optional paired actual
+ * mouse send separate input reports, INPUT(2) aka STD_MOUSE for the mouse
+ * and INPUT(5) aka KBD_MOUSE for the keyboard's touchpad.
+ *
+ * On MX5x00 receivers (which can also be paired with a Dinovo keyboard)
+ * INPUT(2) is used for both an optional paired actual mouse and for the
+ * keyboard's touchpad.
+ */
+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]) {
+ if (djrcv_dev->type == recvr_type_dinovo)
+ workitem->reports_supported |= KBD_MOUSE;
+ else
+ 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 */
+ if (hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & HIDPP_27MHZ_SECURE_MASK) {
+ hid_info(hdev, "Keyboard connection is encrypted\n");
+ } else {
+ hid_warn(hdev, "Keyboard events are send over the air in plain-text / unencrypted\n");
+ hid_warn(hdev, "See: https://gitlab.freedesktop.org/jwrdegoede/logitech-27mhz-keyboard-encryption-setup/\n");
+ }
+ fallthrough;
+ 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 (recvr_type_is_bluetooth(djdev->dj_receiver_dev->type))
+ rdcat(rdesc, &rsize, mse_bluetooth_descriptor,
+ sizeof(mse_bluetooth_descriptor));
+ else
+ rdcat(rdesc, &rsize, mse_descriptor,
+ sizeof(mse_descriptor));
+ }
+
+ if (djdev->reports_supported & KBD_MOUSE) {
+ dbg_hid("%s: sending a kbd-mouse descriptor, reports_supported: %llx\n",
+ __func__, djdev->reports_supported);
+ rdcat(rdesc, &rsize, mse5_bluetooth_descriptor,
+ sizeof(mse5_bluetooth_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 bool logi_dj_ll_may_wakeup(struct hid_device *hid)
+{
+ struct dj_device *djdev = hid->driver_data;
+ struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
+
+ return hid_hw_may_wakeup(djrcv_dev->hidpp);
+}
+
+static const 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,
+ .may_wakeup = logi_dj_ll_may_wakeup,
+};
+
+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;
+ case recvr_type_dinovo: 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[] = {
+ { /* Logitech unifying receiver (0xc52b) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER),
+ .driver_data = recvr_type_dj},
+ { /* Logitech unifying receiver (0xc532) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2),
+ .driver_data = recvr_type_dj},
+
+ { /* Logitech Nano mouse only receiver (0xc52f) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_LOGITECH_NANO_RECEIVER),
+ .driver_data = recvr_type_mouse_only},
+ { /* Logitech Nano (non DJ) receiver (0xc534) */
+ 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,
+ USB_DEVICE_ID_LOGITECH_G700_RECEIVER),
+ .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 powerplay receiver (0xc53a) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY),
+ .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 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. (0xc70e) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_MX5000_RECEIVER_KBD_DEV),
+ .driver_data = recvr_type_bluetooth},
+ { /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. (0xc70a) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_MX5000_RECEIVER_MOUSE_DEV),
+ .driver_data = recvr_type_bluetooth},
+ { /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. (0xc71b) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_MX5500_RECEIVER_KBD_DEV),
+ .driver_data = recvr_type_bluetooth},
+ { /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. (0xc71c) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_MX5500_RECEIVER_MOUSE_DEV),
+ .driver_data = recvr_type_bluetooth},
+
+ { /* Logitech Dinovo Edge HID++ / bluetooth receiver keyboard intf. (0xc713) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_DINOVO_EDGE_RECEIVER_KBD_DEV),
+ .driver_data = recvr_type_dinovo},
+ { /* Logitech Dinovo Edge HID++ / bluetooth receiver mouse intf. (0xc714) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_DINOVO_EDGE_RECEIVER_MOUSE_DEV),
+ .driver_data = recvr_type_dinovo},
+ { /* Logitech DiNovo Mini HID++ / bluetooth receiver mouse intf. (0xc71e) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_DINOVO_MINI_RECEIVER_KBD_DEV),
+ .driver_data = recvr_type_dinovo},
+ { /* Logitech DiNovo Mini HID++ / bluetooth receiver keyboard intf. (0xc71f) */
+ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH,
+ USB_DEVICE_ID_DINOVO_MINI_RECEIVER_MOUSE_DEV),
+ .driver_data = recvr_type_dinovo},
+ {}
+};
+
+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");