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Release 4.7 drivers/hid/hid-logitech-dj.c

Directory: drivers/hid
/*
 *  HID driver for Logitech Unifying receivers
 *
 *  Copyright (c) 2011 Logitech
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.

 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */


#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/kfifo.h>
#include <asm/unaligned.h>
#include "hid-ids.h"


#define DJ_MAX_PAIRED_DEVICES			6

#define DJ_MAX_NUMBER_NOTIFICATIONS		8

#define DJ_RECEIVER_INDEX			0

#define DJ_DEVICE_INDEX_MIN			1

#define DJ_DEVICE_INDEX_MAX			6


#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 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				0x00000002

#define STD_MOUSE				0x00000004

#define MULTIMEDIA				0x00000008

#define POWER_KEYS				0x00000010

#define MEDIA_CENTER				0x00000100

#define KBD_LEDS				0x00004000


struct dj_report {
	
u8 report_id;
	
u8 device_index;
	
u8 report_type;
	
u8 report_params[DJREPORT_SHORT_LENGTH - 3];
};


struct dj_receiver_dev {
	
struct hid_device *hdev;
	
struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
					    DJ_DEVICE_INDEX_MIN];
	
struct work_struct work;
	
struct kfifo notif_fifo;
	
spinlock_t lock;
	
bool querying_devices;
};


struct dj_device {
	
struct hid_device *hdev;
	
struct dj_receiver_dev *dj_receiver_dev;
	
u32 reports_supported;
	
u8 device_index;
};

/* 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                      */
};

/* 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, 0x8C, 0x02,	/* LOGICAL_MAX (652)                   */
	0x19, 0x01,		/* USAGE_MIN (1)                       */
	0x2A, 0x8C, 0x02,	/* USAGE_MAX (652)                     */
	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_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 logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev, struct dj_report *dj_report) { /* 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[dj_report->device_index]; djrcv_dev->paired_dj_devices[dj_report->device_index] = NULL; spin_unlock_irqrestore(&djrcv_dev->lock, flags); if (dj_dev != NULL) { hid_destroy_device(dj_dev->hdev); kfree(dj_dev); } else { dev_err(&djrcv_dev->hdev->dev, "%s: can't destroy a NULL device\n", __func__); } }

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static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev, struct dj_report *dj_report) { /* Called in delayed work context */ struct hid_device *djrcv_hdev = djrcv_dev->hdev; struct usb_interface *intf = to_usb_interface(djrcv_hdev->dev.parent); struct usb_device *usbdev = interface_to_usbdev(intf); struct hid_device *dj_hiddev; struct dj_device *dj_dev; /* 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]; if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] & SPFUNCTION_DEVICE_LIST_EMPTY) { dbg_hid("%s: device list is empty\n", __func__); djrcv_dev->querying_devices = false; return; } if (djrcv_dev->paired_dj_devices[dj_report->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)) { dev_err(&djrcv_hdev->dev, "%s: hid_allocate_device 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 = le16_to_cpu(usbdev->descriptor.idVendor); dj_hiddev->product = (dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB] << 8) | dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB]; snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), "Logitech Unifying Device. Wireless PID:%04x", dj_hiddev->product); dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE; usb_make_path(usbdev, dj_hiddev->phys, sizeof(dj_hiddev->phys)); snprintf(tmpstr, sizeof(tmpstr), ":%d", dj_report->device_index); strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys)); dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL); if (!dj_dev) { dev_err(&djrcv_hdev->dev, "%s: failed allocating dj_device\n", __func__); goto dj_device_allocate_fail; } dj_dev->reports_supported = get_unaligned_le32( dj_report->report_params + DEVICE_PAIRED_RF_REPORT_TYPE); dj_dev->hdev = dj_hiddev; dj_dev->dj_receiver_dev = djrcv_dev; dj_dev->device_index = dj_report->device_index; dj_hiddev->driver_data = dj_dev; djrcv_dev->paired_dj_devices[dj_report->device_index] = dj_dev; if (hid_add_device(dj_hiddev)) { dev_err(&djrcv_hdev->dev, "%s: failed adding dj_device\n", __func__); goto hid_add_device_fail; } return; hid_add_device_fail: djrcv_dev->paired_dj_devices[dj_report->device_index] = NULL; kfree(dj_dev); dj_device_allocate_fail: hid_destroy_device(dj_hiddev); }

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static void delayedwork_callback(struct work_struct *work) { struct dj_receiver_dev *djrcv_dev = container_of(work, struct dj_receiver_dev, work); struct dj_report dj_report; unsigned long flags; int count; int retval; dbg_hid("%s\n", __func__); spin_lock_irqsave(&djrcv_dev->lock, flags); count = kfifo_out(&djrcv_dev->notif_fifo, &dj_report, sizeof(struct dj_report)); if (count != sizeof(struct dj_report)) { dev_err(&djrcv_dev->hdev->dev, "%s: workitem triggered without " "notifications available\n", __func__); spin_unlock_irqrestore(&djrcv_dev->lock, flags); return; } if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) { if (schedule_work(&djrcv_dev->work) == 0) { dbg_hid("%s: did not schedule the work item, was " "already queued\n", __func__); } } spin_unlock_irqrestore(&djrcv_dev->lock, flags); switch (dj_report.report_type) { case REPORT_TYPE_NOTIF_DEVICE_PAIRED: logi_dj_recv_add_djhid_device(djrcv_dev, &dj_report); break; case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: logi_dj_recv_destroy_djhid_device(djrcv_dev, &dj_report); break; default: /* A normal report (i. e. not belonging to a pair/unpair notification) * arriving here, means that the report arrived but we did not have a * paired dj_device associated to the report's device_index, this * means that the original "device paired" notification corresponding * to this dj_device never arrived to this driver. The reason is that * hid-core discards all packets coming from a device while probe() is * executing. */ if (!djrcv_dev->paired_dj_devices[dj_report.device_index]) { /* ok, we don't know the device, just re-ask the * receiver for the list of connected devices. */ retval = logi_dj_recv_query_paired_devices(djrcv_dev); if (!retval) { /* everything went fine, so just leave */ break; } dev_err(&djrcv_dev->hdev->dev, "%s:logi_dj_recv_query_paired_devices " "error:%d\n", __func__, retval); } dbg_hid("%s: unexpected report type\n", __func__); } }

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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) */ kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report)); if (schedule_work(&djrcv_dev->work) == 0) { dbg_hid("%s: did not schedule the work item, was already " "queued\n", __func__); } }

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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"); } } } }

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nestor lopez casadonestor lopez casado119100.00%1100.00%
Total119100.00%1100.00%


static void logi_dj_recv_forward_report(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"); } }

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nestor lopez casadonestor lopez casado103100.00%1100.00%
Total103100.00%1100.00%


static void logi_dj_recv_forward_hidpp(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"); }

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benjamin tissoiresbenjamin tissoires3175.61%150.00%
nestor lopez casadonestor lopez casado1024.39%150.00%
Total41100.00%2100.00%


static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, struct dj_report *dj_report) { struct hid_device *hdev = djrcv_dev->hdev; 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) { dev_err(&hdev->dev, "%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; }

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benjamin tissoiresbenjamin tissoires10071.43%240.00%
nestor lopez casadonestor lopez casado3424.29%120.00%
kees cookkees cook42.86%120.00%
jiri kosinajiri kosina21.43%120.00%
Total140100.00%5100.00%


static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev) { struct dj_report *dj_report; int retval; /* no need to protect djrcv_dev->querying_devices */ if (djrcv_dev->querying_devices) return 0; 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 = 0xFF; 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; }

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nestor lopez casadonestor lopez casado5462.79%250.00%
marc dionnemarc dionne3136.05%125.00%
alan coxalan cox11.16%125.00%
Total86100.00%4100.00%


static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev, unsigned timeout) { struct hid_device *hdev = djrcv_dev->hdev; struct dj_report *dj_report; u8 *buf; int retval; 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 = 0xFF; 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); /* * 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] = 0xFF; buf[2] = 0x80; buf[3] = 0x00; buf[4] = 0x00; buf[5] = 0x09; buf[6] = 0x00; 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; }

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benjamin tissoiresbenjamin tissoires10250.75%233.33%
nestor lopez casadonestor lopez casado6632.84%233.33%
marc dionnemarc dionne3215.92%116.67%
alan coxalan cox10.50%116.67%
Total201100.00%6100.00%


static int logi_dj_ll_open(struct hid_device *hid) { dbg_hid("%s:%s\n", __func__, hid->phys); return 0; }

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nestor lopez casadonestor lopez casado25100.00%1100.00%
Total25100.00%1100.00%


static void logi_dj_ll_close(struct hid_device *hid) { dbg_hid("%s:%s\n", __func__, hid->phys); }

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nestor lopez casadonestor lopez casado22100.00%1100.00%
Total22100.00%1100.00%

static u8 unifying_name_query[] = {0x10, 0xff, 0x83, 0xb5, 0x40, 0x00, 0x00}; static u8 unifying_name_answer[] = {0x11, 0xff, 0x83, 0xb5};
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)) { if (count < 2) return -EINVAL; /* special case where we should not overwrite * the device_index */ if (count == 7 && !memcmp(buf, unifying_name_query, sizeof(unifying_name_query))) buf[4] |= djdev->device_index - 1; else buf[1] = djdev->device_index; return hid_hw_raw_request(djrcv_dev->hdev, reportnum, buf, count, report_type, reqtype); } if (buf[0] != REPORT_TYPE_LEDS) return -EINVAL; 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->hdev, out_buf[0], out_buf, DJREPORT_SHORT_LENGTH, report_type, reqtype); kfree(out_buf); return ret; }

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benjamin tissoiresbenjamin tissoires21988.66%466.67%
nestor lopez casadonestor lopez casado2710.93%116.67%
jiri kosinajiri kosina10.40%116.67%
Total247100.00%6100.00%


static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size) { memcpy(rdesc + *rsize, data, size); *rsize += size; }

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henrik rydberghenrik rydberg41100.00%1100.00%
Total41100.00%1100.00%


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: %x\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: " "%x\n", __func__, djdev->reports_supported); rdcat(rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor)); } if (djdev->reports_supported & MULTIMEDIA) { dbg_hid("%s: sending a multimedia report descriptor: %x\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: %x\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: %x\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: %x\n", __func__, djdev->reports_supported); } rdcat(rdesc, &rsize, hidpp_descriptor, sizeof(hidpp_descriptor)); retval = hid_parse_report(hid, rdesc, rsize); kfree(rdesc); return retval; }

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nestor lopez casadonestor lopez casado22572.58%133.33%
henrik rydberghenrik rydberg7022.58%133.33%
benjamin tissoiresbenjamin tissoires154.84%133.33%
Total310100.00%3100.00%


static int logi_dj_ll_start(struct hid_device *hid) { dbg_hid("%s\n", __func__); return 0; }

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nestor lopez casadonestor lopez casado21100.00%1100.00%
Total21100.00%1100.00%


static void logi_dj_ll_stop(struct hid_device *hid) { dbg_hid("%s\n", __func__); }

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nestor lopez casadonestor lopez casado18100.00%1100.00%
Total18100.00%1100.00%

static struct hid_ll_driver logi_dj_ll_driver = { .parse = logi_dj_ll_parse, .start = logi_dj_ll_start, .stop = logi_dj_ll_stop, .open = logi_dj_ll_open, .close = logi_dj_ll_close, .raw_request = logi_dj_ll_raw_request, };
static int logi_dj_dj_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) { struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); struct dj_report *dj_report = (struct dj_report *) data; unsigned long flags; /* * Here we receive all data coming from iface 2, there are 3 cases: * * 1) Data is intended for this driver i. e. data contains arrival, * departure, etc notifications, in which case we queue them for delayed * processing by the work queue. We return 1 to hid-core as no further * processing is required from it. * * 2) Data informs a connection change, if the change means rf link * loss, then we must send a null report to the upper layer to discard * potentially pressed keys that may be repeated forever by the input * layer. Return 1 to hid-core as no further processing is required. * * 3) Data is an actual input event from a paired DJ device in which * case we forward it to the correct hid device (via hid_input_report() * ) and return 1 so hid-core does not anything else with it. */ if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) || (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) { /* * Device index is wrong, bail out. * This driver can ignore safely the receiver notifications, * so ignore those reports too. */ if (dj_report->device_index != DJ_RECEIVER_INDEX) dev_err(&hdev->dev, "%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_report(djrcv_dev, dj_report); } out: spin_unlock_irqrestore(&djrcv_dev->lock, flags); return true; }

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nestor lopez casadonestor lopez casado12460.78%120.00%
benjamin tissoiresbenjamin tissoires4120.10%360.00%
jiri kosinajiri kosina3919.12%120.00%
Total204100.00%5100.00%


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 dj_report *dj_report = (struct dj_report *) data; unsigned long flags; u8 device_index = dj_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_name_answer, sizeof(unifying_name_answer)) && ((data[4] & 0xF0) == 0x40)) 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. */ dev_err(&hdev->dev, "%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[device_index]) /* received an event for an unknown device, bail out */ goto out; logi_dj_recv_forward_hidpp(djrcv_dev->paired_dj_devices[device_index], data, size); out: spin_unlock_irqrestore(&djrcv_dev->lock, flags); return false; }

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benjamin tissoiresbenjamin tissoires204100.00%2100.00%
Total204100.00%2100.00%


static int logi_dj_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) { dbg_hid("%s, size:%d\n", __func__, size); switch (data[0]) { case REPORT_ID_DJ_SHORT: if (size != DJREPORT_SHORT_LENGTH) { dev_err(&hdev->dev, "DJ report of 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) { dev_err(&hdev->dev, "Short HID++ report of 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) { dev_err(&hdev->dev, "Long HID++ report of bad size (%d)", size); return false; } return logi_dj_hidpp_event(hdev, report, data, size); } return false; }

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peter wupeter wu8151.27%150.00%
benjamin tissoiresbenjamin tissoires7748.73%150.00%
Total158100.00%2100.00%


static int logi_dj_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); struct dj_receiver_dev *djrcv_dev; int retval; dbg_hid("%s called for ifnum %d\n", __func__, intf->cur_altsetting->desc.bInterfaceNumber); /* Ignore interfaces 0 and 1, they will not carry any data, dont create * any hid_device for them */ if (intf->cur_altsetting->desc.bInterfaceNumber != LOGITECH_DJ_INTERFACE_NUMBER) { dbg_hid("%s: ignoring ifnum %d\n", __func__, intf->cur_altsetting->desc.bInterfaceNumber); return -ENODEV; } /* Treat interface 2 */ djrcv_dev = kzalloc(sizeof(struct dj_receiver_dev), GFP_KERNEL); if (!djrcv_dev) { dev_err(&hdev->dev, "%s:failed allocating dj_receiver_dev\n", __func__); return -ENOMEM; } djrcv_dev->hdev = hdev; INIT_WORK(&djrcv_dev->work, delayedwork_callback); spin_lock_init(&djrcv_dev->lock); if (kfifo_alloc(&djrcv_dev->notif_fifo, DJ_MAX_NUMBER_NOTIFICATIONS * sizeof(struct dj_report), GFP_KERNEL)) { dev_err(&hdev->dev, "%s:failed allocating notif_fifo\n", __func__); kfree(djrcv_dev); return -ENOMEM; } hid_set_drvdata(hdev, djrcv_dev); /* Call to usbhid to fetch the HID descriptors of interface 2 and * subsequently call to the hid/hid-core to parse the fetched * descriptors, this will in turn create the hidraw and hiddev nodes * for interface 2 of the receiver */ retval = hid_parse(hdev); if (retval) { dev_err(&hdev->dev, "%s:parse of interface 2 failed\n", __func__); goto hid_parse_fail; } if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, REPORT_ID_DJ_SHORT, 0, DJREPORT_SHORT_LENGTH - 1)) { retval = -ENODEV; goto hid_parse_fail; } /* Starts the usb device and connects to upper interfaces hiddev and * hidraw */ retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (retval) { dev_err(&hdev->dev, "%s:hid_hw_start returned error\n", __func__); goto hid_hw_start_fail; } retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); if (retval < 0) { dev_err(&hdev->dev, "%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) { dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n", __func__, retval); goto llopen_failed; } /* Allow incoming packets to arrive: */ hid_device_io_start(hdev); retval = logi_dj_recv_query_paired_devices(djrcv_dev); if (retval < 0) { dev_err(&hdev->dev, "%s:logi_dj_recv_query_paired_devices " "error:%d\n", __func__, retval); goto logi_dj_recv_query_paired_devices_failed; } return retval; logi_dj_recv_query_paired_devices_failed: hid_hw_close(hdev); llopen_failed: switch_to_dj_mode_fail: hid_hw_stop(hdev); hid_hw_start_fail: hid_parse_fail: kfifo_free(&djrcv_dev->notif_fifo); kfree(djrcv_dev); hid_set_drvdata(hdev, NULL); return retval; }

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nestor lopez casadonestor lopez casado40291.57%125.00%
kees cookkees cook286.38%125.00%
andrew de los reyesandrew de los reyes61.37%125.00%
benjamin tissoiresbenjamin tissoires30.68%125.00%
Total439100.00%4100.00%

#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); retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); if (retval < 0) { dev_err(&hdev->dev, "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n", __func__, retval); } return 0; }

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nestor lopez casadonestor lopez casado58100.00%1100.00%
Total58100.00%1100.00%

#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; int i; dbg_hid("%s\n", __func__); cancel_work_sync(&djrcv_dev->work); hid_hw_close(hdev); hid_hw_stop(hdev); /* I suppose that at this point the only context that can access * the djrecv_data is this thread as the work item is guaranteed to * have finished and no more raw_event callbacks should arrive after * the remove callback was triggered so no locks are put around the * code below */ for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { dj_dev = djrcv_dev->paired_dj_devices[i]; if (dj_dev != NULL) { hid_destroy_device(dj_dev->hdev); kfree(dj_dev); djrcv_dev->paired_dj_devices[i] = NULL; } } kfifo_free(&djrcv_dev->notif_fifo); kfree(djrcv_dev); hid_set_drvdata(hdev, NULL); }

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nestor lopez casadonestor lopez casado13199.24%266.67%
benjamin tissoiresbenjamin tissoires10.76%133.33%
Total132100.00%3100.00%

static const struct hid_device_id logi_dj_receivers[] = { {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER)}, {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2)}, {} }; 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");

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nestor lopez casadonestor lopez casado299062.46%414.81%
benjamin tissoiresbenjamin tissoires145130.31%1348.15%
henrik rydberghenrik rydberg1162.42%13.70%
peter wupeter wu811.69%13.70%
marc dionnemarc dionne631.32%13.70%
jiri kosinajiri kosina420.88%311.11%
kees cookkees cook320.67%13.70%
andrew de los reyesandrew de los reyes60.13%13.70%
jonathan niederjonathan nieder40.08%13.70%
alan coxalan cox20.04%13.70%
Total4787100.00%27100.00%
Directory: drivers/hid
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{% endraw %}