/* * 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 #include #include #include #include #include "hid-ids.h" #include "hid-logitech-dj.h" /* 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, 0x05, /* REPORT COUNT (5) */ 0x05, 0x08, /* USAGE PAGE (LED page) */ 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) */ 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) */ 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 */ }; /* */ /* 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)) /* 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_output_hidraw_report(struct hid_device *hid, u8 * buf, size_t count, unsigned char report_type); 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__); } } 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->hid_output_raw_report = logi_dj_output_hidraw_report; dj_hiddev->dev.parent = &djrcv_hdev->dev; dj_hiddev->bus = BUS_USB; dj_hiddev->vendor = le16_to_cpu(usbdev->descriptor.idVendor); dj_hiddev->product = le16_to_cpu(usbdev->descriptor.idProduct); snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), "Logitech Unifying Device. Wireless PID:%02x%02x", dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB], dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB]); 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); } 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__); } } 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__); } } 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]; if (!djdev) { dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]" " is NULL, index %d\n", dj_report->device_index); 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__); } return; } 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_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_device == NULL) { dbg_hid("djrcv_dev->paired_dj_devices[dj_report->device_index]" " is NULL, index %d\n", dj_report->device_index); 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__); } return; } 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 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; } 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; } static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev, unsigned timeout) { struct dj_report *dj_report; 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); 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); } static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf, size_t count, unsigned char report_type) { /* Called by hid raw to send data */ dbg_hid("%s\n", __func__); return 0; } 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: %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); } retval = hid_parse_report(hid, rdesc, rsize); kfree(rdesc); return retval; } static int logi_dj_ll_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { /* Sent by the input layer to handle leds and Force Feedback */ struct hid_device *dj_hiddev = input_get_drvdata(dev); struct dj_device *dj_dev = dj_hiddev->driver_data; struct dj_receiver_dev *djrcv_dev = dev_get_drvdata(dj_hiddev->dev.parent); struct hid_device *dj_rcv_hiddev = djrcv_dev->hdev; struct hid_report_enum *output_report_enum; struct hid_field *field; struct hid_report *report; unsigned char *data; int offset; dbg_hid("%s: %s, type:%d | code:%d | value:%d\n", __func__, dev->phys, type, code, value); if (type != EV_LED) return -1; offset = hidinput_find_field(dj_hiddev, type, code, &field); if (offset == -1) { dev_warn(&dev->dev, "event field not found\n"); return -1; } hid_set_field(field, offset, value); data = hid_alloc_report_buf(field->report, GFP_KERNEL); if (!data) { dev_warn(&dev->dev, "failed to allocate report buf memory\n"); return -1; } hid_output_report(field->report, &data[0]); output_report_enum = &dj_rcv_hiddev->report_enum[HID_OUTPUT_REPORT]; report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT]; hid_set_field(report->field[0], 0, dj_dev->device_index); hid_set_field(report->field[0], 1, REPORT_TYPE_LEDS); hid_set_field(report->field[0], 2, data[1]); hid_hw_request(dj_rcv_hiddev, report, HID_REQ_SET_REPORT); kfree(data); return 0; } static int logi_dj_ll_start(struct hid_device *hid) { dbg_hid("%s\n", __func__); return 0; } static void logi_dj_ll_stop(struct hid_device *hid) { dbg_hid("%s\n", __func__); } static struct hid_ll_driver logi_dj_ll_driver = { .parse = logi_dj_ll_parse, .start = logi_dj_ll_start, .stop = logi_dj_ll_stop, .open = logi_dj_ll_open, .close = logi_dj_ll_close, .hidinput_input_event = logi_dj_ll_input_event, }; 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); struct dj_report *dj_report = (struct dj_report *) data; unsigned long flags; dbg_hid("%s, size:%d\n", __func__, size); /* Here we receive all data coming from iface 2, there are 4 cases: * * 1) Data should continue its normal processing i.e. data does not * come from the DJ collection, in which case we do nothing and * return 0, so hid-core can continue normal processing (will forward * to associated hidraw device) * * 2) Data is from DJ collection, and 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. * * 3) Data is from DJ collection, and 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. * * 4) Data is from DJ collection and 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 do * anything else with it. */ /* case 1) */ if (data[0] != REPORT_ID_DJ_SHORT) return false; 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); switch (dj_report->report_type) { case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 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); } spin_unlock_irqrestore(&djrcv_dev->lock, flags); return true; } 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; if (is_dj_device((struct dj_device *)hdev->driver_data)) return -ENODEV; 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 = hdev->ll_driver->open(hdev); if (retval < 0) { dev_err(&hdev->dev, "%s:hdev->ll_driver->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: hdev->ll_driver->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; } #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; } #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); hdev->ll_driver->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); } static int logi_djdevice_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; struct dj_device *dj_dev = hdev->driver_data; if (!is_dj_device(dj_dev)) return -ENODEV; ret = hid_parse(hdev); if (!ret) ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); return ret; } 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 }; static const struct hid_device_id logi_dj_devices[] = { {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)}, {} }; static struct hid_driver logi_djdevice_driver = { .name = "logitech-djdevice", .id_table = logi_dj_devices, .probe = logi_djdevice_probe, }; static int __init logi_dj_init(void) { int retval; dbg_hid("Logitech-DJ:%s\n", __func__); retval = hid_register_driver(&logi_djreceiver_driver); if (retval) return retval; retval = hid_register_driver(&logi_djdevice_driver); if (retval) hid_unregister_driver(&logi_djreceiver_driver); return retval; } static void __exit logi_dj_exit(void) { dbg_hid("Logitech-DJ:%s\n", __func__); hid_unregister_driver(&logi_djdevice_driver); hid_unregister_driver(&logi_djreceiver_driver); } module_init(logi_dj_init); module_exit(logi_dj_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Logitech"); MODULE_AUTHOR("Nestor Lopez Casado"); MODULE_AUTHOR("nlopezcasad@logitech.com");