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hid-logitech-dj.c
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// 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;