2 * QEMU Bluetooth HID Profile wrapper for USB HID.
4 * Copyright (C) 2007-2008 OpenMoko, Inc.
5 * Written by Andrzej Zaborowski <andrew@openedhand.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 or
10 * (at your option) version 3 of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 #include "qemu-common.h"
27 enum hid_transaction_req {
32 BT_GET_PROTOCOL = 0x6,
33 BT_SET_PROTOCOL = 0x7,
40 enum hid_transaction_handshake {
41 BT_HS_SUCCESSFUL = 0x0,
42 BT_HS_NOT_READY = 0x1,
43 BT_HS_ERR_INVALID_REPORT_ID = 0x2,
44 BT_HS_ERR_UNSUPPORTED_REQUEST = 0x3,
45 BT_HS_ERR_INVALID_PARAMETER = 0x4,
46 BT_HS_ERR_UNKNOWN = 0xe,
47 BT_HS_ERR_FATAL = 0xf,
50 enum hid_transaction_control {
52 BT_HC_HARD_RESET = 0x1,
53 BT_HC_SOFT_RESET = 0x2,
55 BT_HC_EXIT_SUSPEND = 0x4,
56 BT_HC_VIRTUAL_CABLE_UNPLUG = 0x5,
60 BT_HID_PROTO_BOOT = 0,
61 BT_HID_PROTO_REPORT = 1,
64 enum hid_boot_reportid {
65 BT_HID_BOOT_INVALID = 0,
79 /* HID interface requests */
80 #define GET_REPORT 0xa101
81 #define GET_IDLE 0xa102
82 #define GET_PROTOCOL 0xa103
83 #define SET_REPORT 0x2109
84 #define SET_IDLE 0x210a
85 #define SET_PROTOCOL 0x210b
87 struct bt_hid_device_s {
88 struct bt_l2cap_device_s btdev;
89 struct bt_l2cap_conn_params_s *control;
90 struct bt_l2cap_conn_params_s *interrupt;
100 } dataother, datain, dataout, feature, intrdataout;
103 bt_state_transaction,
108 static void bt_hid_reset(struct bt_hid_device_s *s)
110 struct bt_scatternet_s *net = s->btdev.device.net;
112 /* Go as far as... */
113 bt_l2cap_device_done(&s->btdev);
114 bt_l2cap_device_init(&s->btdev, net);
116 s->usbdev->handle_reset(s->usbdev);
117 s->proto = BT_HID_PROTO_REPORT;
118 s->state = bt_state_ready;
119 s->dataother.len = 0;
123 s->intrdataout.len = 0;
127 static int bt_hid_out(struct bt_hid_device_s *s)
131 if (s->data_type == BT_DATA_OUTPUT) {
132 p.pid = USB_TOKEN_OUT;
134 p.data = s->dataout.buffer;
135 p.len = s->dataout.len;
136 s->dataout.len = s->usbdev->handle_data(s->usbdev, &p);
138 return s->dataout.len;
141 if (s->data_type == BT_DATA_FEATURE) {
143 * does this send a USB_REQ_CLEAR_FEATURE/USB_REQ_SET_FEATURE
144 * or a SET_REPORT? */
151 static int bt_hid_in(struct bt_hid_device_s *s)
155 p.pid = USB_TOKEN_IN;
157 p.data = s->datain.buffer;
158 p.len = sizeof(s->datain.buffer);
159 s->datain.len = s->usbdev->handle_data(s->usbdev, &p);
161 return s->datain.len;
164 static void bt_hid_send_handshake(struct bt_hid_device_s *s, int result)
166 *s->control->sdu_out(s->control, 1) =
167 (BT_HANDSHAKE << 4) | result;
168 s->control->sdu_submit(s->control);
171 static void bt_hid_send_control(struct bt_hid_device_s *s, int operation)
173 *s->control->sdu_out(s->control, 1) =
174 (BT_HID_CONTROL << 4) | operation;
175 s->control->sdu_submit(s->control);
178 static void bt_hid_disconnect(struct bt_hid_device_s *s)
180 /* Disconnect s->control and s->interrupt */
183 static void bt_hid_send_data(struct bt_l2cap_conn_params_s *ch, int type,
184 const uint8_t *data, int len)
186 uint8_t *pkt, hdr = (BT_DATA << 4) | type;
190 plen = MIN(len, ch->remote_mtu - 1);
191 pkt = ch->sdu_out(ch, plen + 1);
195 memcpy(pkt + 1, data, plen);
200 hdr = (BT_DATC << 4) | type;
201 } while (plen == ch->remote_mtu - 1);
204 static void bt_hid_control_transaction(struct bt_hid_device_s *s,
205 const uint8_t *data, int len)
207 uint8_t type, parameter;
213 parameter = data[0] & 0xf;
220 /* These are not expected to be sent this direction. */
221 ret = BT_HS_ERR_INVALID_PARAMETER;
226 if (len != 1 || (parameter != BT_HC_VIRTUAL_CABLE_UNPLUG &&
227 s->state == bt_state_transaction)) {
228 ret = BT_HS_ERR_INVALID_PARAMETER;
234 case BT_HC_HARD_RESET:
235 case BT_HC_SOFT_RESET:
239 if (s->state == bt_state_ready)
240 s->state = bt_state_suspend;
242 ret = BT_HS_ERR_INVALID_PARAMETER;
244 case BT_HC_EXIT_SUSPEND:
245 if (s->state == bt_state_suspend)
246 s->state = bt_state_ready;
248 ret = BT_HS_ERR_INVALID_PARAMETER;
250 case BT_HC_VIRTUAL_CABLE_UNPLUG:
251 bt_hid_disconnect(s);
254 ret = BT_HS_ERR_INVALID_PARAMETER;
259 /* No ReportIDs declared. */
260 if (((parameter & 8) && len != 3) ||
261 (!(parameter & 8) && len != 1) ||
262 s->state != bt_state_ready) {
263 ret = BT_HS_ERR_INVALID_PARAMETER;
267 rlen = data[2] | (data[3] << 8);
270 switch (parameter & 3) {
272 ret = BT_HS_ERR_INVALID_PARAMETER;
275 /* Here we can as well poll s->usbdev */
276 bt_hid_send_data(s->control, BT_DATA_INPUT,
277 s->datain.buffer, MIN(rlen, s->datain.len));
280 bt_hid_send_data(s->control, BT_DATA_OUTPUT,
281 s->dataout.buffer, MIN(rlen, s->dataout.len));
283 case BT_DATA_FEATURE:
284 bt_hid_send_data(s->control, BT_DATA_FEATURE,
285 s->feature.buffer, MIN(rlen, s->feature.len));
291 if (len < 2 || len > BT_HID_MTU || s->state != bt_state_ready ||
292 (parameter & 3) == BT_DATA_OTHER ||
293 (parameter & 3) == BT_DATA_INPUT) {
294 ret = BT_HS_ERR_INVALID_PARAMETER;
297 s->data_type = parameter & 3;
298 if (s->data_type == BT_DATA_OUTPUT) {
299 s->dataout.len = len - 1;
300 memcpy(s->dataout.buffer, data + 1, s->dataout.len);
302 s->feature.len = len - 1;
303 memcpy(s->feature.buffer, data + 1, s->feature.len);
305 if (len == BT_HID_MTU)
306 s->state = bt_state_transaction;
311 case BT_GET_PROTOCOL:
312 if (len != 1 || s->state == bt_state_transaction) {
313 ret = BT_HS_ERR_INVALID_PARAMETER;
316 *s->control->sdu_out(s->control, 1) = s->proto;
317 s->control->sdu_submit(s->control);
320 case BT_SET_PROTOCOL:
321 if (len != 1 || s->state == bt_state_transaction ||
322 (parameter != BT_HID_PROTO_BOOT &&
323 parameter != BT_HID_PROTO_REPORT)) {
324 ret = BT_HS_ERR_INVALID_PARAMETER;
327 s->proto = parameter;
328 s->usbdev->handle_control(s->usbdev, SET_PROTOCOL, s->proto, 0, 0, 0);
329 ret = BT_HS_SUCCESSFUL;
333 if (len != 1 || s->state == bt_state_transaction) {
334 ret = BT_HS_ERR_INVALID_PARAMETER;
337 s->usbdev->handle_control(s->usbdev, GET_IDLE, 0, 0, 1,
338 s->control->sdu_out(s->control, 1));
339 s->control->sdu_submit(s->control);
343 if (len != 2 || s->state == bt_state_transaction) {
344 ret = BT_HS_ERR_INVALID_PARAMETER;
348 /* We don't need to know about the Idle Rate here really,
349 * so just pass it on to the device. */
350 ret = s->usbdev->handle_control(s->usbdev,
351 SET_IDLE, data[1], 0, 0, 0) ?
352 BT_HS_SUCCESSFUL : BT_HS_ERR_INVALID_PARAMETER;
353 /* XXX: Does this generate a handshake? */
357 if (len > BT_HID_MTU || s->state != bt_state_transaction) {
358 ret = BT_HS_ERR_INVALID_PARAMETER;
361 if (s->data_type == BT_DATA_OUTPUT) {
362 memcpy(s->dataout.buffer + s->dataout.len, data + 1, len - 1);
363 s->dataout.len += len - 1;
365 memcpy(s->feature.buffer + s->feature.len, data + 1, len - 1);
366 s->feature.len += len - 1;
368 if (len < BT_HID_MTU) {
370 s->state = bt_state_ready;
375 ret = BT_HS_ERR_UNSUPPORTED_REQUEST;
379 bt_hid_send_handshake(s, ret);
382 static void bt_hid_control_sdu(void *opaque, const uint8_t *data, int len)
384 struct bt_hid_device_s *hid = opaque;
386 return bt_hid_control_transaction(hid, data, len);
389 static void bt_hid_datain(void *opaque)
391 struct bt_hid_device_s *hid = opaque;
393 /* If suspended, wake-up and send a wake-up event first. We might
394 * want to also inspect the input report and ignore event like
395 * mouse movements until a button event occurs. */
396 if (hid->state == bt_state_suspend) {
397 hid->state = bt_state_ready;
400 if (bt_hid_in(hid) > 0)
401 /* TODO: when in boot-mode precede any Input reports with the ReportID
402 * byte, here and in GetReport/SetReport on the Control channel. */
403 bt_hid_send_data(hid->interrupt, BT_DATA_INPUT,
404 hid->datain.buffer, hid->datain.len);
407 static void bt_hid_interrupt_sdu(void *opaque, const uint8_t *data, int len)
409 struct bt_hid_device_s *hid = opaque;
411 if (len > BT_HID_MTU || len < 1)
413 if ((data[0] & 3) != BT_DATA_OUTPUT)
415 if ((data[0] >> 4) == BT_DATA) {
419 hid->data_type = BT_DATA_OUTPUT;
420 hid->intrdataout.len = 0;
421 } else if ((data[0] >> 4) == BT_DATC) {
422 if (!hid->intr_state)
427 memcpy(hid->intrdataout.buffer + hid->intrdataout.len, data + 1, len - 1);
428 hid->intrdataout.len += len - 1;
429 hid->intr_state = (len == BT_HID_MTU);
430 if (!hid->intr_state) {
431 memcpy(hid->dataout.buffer, hid->intrdataout.buffer,
432 hid->dataout.len = hid->intrdataout.len);
438 fprintf(stderr, "%s: bad transaction on Interrupt channel.\n",
442 /* "Virtual cable" plug/unplug event. */
443 static void bt_hid_connected_update(struct bt_hid_device_s *hid)
445 int prev = hid->connected;
447 hid->connected = hid->control && hid->interrupt;
449 /* Stop page-/inquiry-scanning when a host is connected. */
450 hid->btdev.device.page_scan = !hid->connected;
451 hid->btdev.device.inquiry_scan = !hid->connected;
453 if (hid->connected && !prev) {
454 hid->usbdev->handle_reset(hid->usbdev);
455 hid->proto = BT_HID_PROTO_REPORT;
458 /* Should set HIDVirtualCable in SDP (possibly need to check that SDP
459 * isn't destroyed yet, in case we're being called from handle_destroy) */
462 static void bt_hid_close_control(void *opaque)
464 struct bt_hid_device_s *hid = opaque;
467 bt_hid_connected_update(hid);
470 static void bt_hid_close_interrupt(void *opaque)
472 struct bt_hid_device_s *hid = opaque;
475 bt_hid_connected_update(hid);
478 static int bt_hid_new_control_ch(struct bt_l2cap_device_s *dev,
479 struct bt_l2cap_conn_params_s *params)
481 struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev;
486 hid->control = params;
487 hid->control->opaque = hid;
488 hid->control->close = bt_hid_close_control;
489 hid->control->sdu_in = bt_hid_control_sdu;
491 bt_hid_connected_update(hid);
496 static int bt_hid_new_interrupt_ch(struct bt_l2cap_device_s *dev,
497 struct bt_l2cap_conn_params_s *params)
499 struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev;
504 hid->interrupt = params;
505 hid->interrupt->opaque = hid;
506 hid->interrupt->close = bt_hid_close_interrupt;
507 hid->interrupt->sdu_in = bt_hid_interrupt_sdu;
509 bt_hid_connected_update(hid);
514 static void bt_hid_destroy(struct bt_device_s *dev)
516 struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev;
519 bt_hid_send_control(hid, BT_HC_VIRTUAL_CABLE_UNPLUG);
520 bt_l2cap_device_done(&hid->btdev);
522 hid->usbdev->handle_destroy(hid->usbdev);
527 enum peripheral_minor_class {
528 class_other = 0 << 4,
529 class_keyboard = 1 << 4,
530 class_pointing = 2 << 4,
531 class_combo = 3 << 4,
534 static struct bt_device_s *bt_hid_init(struct bt_scatternet_s *net,
535 USBDevice *dev, enum peripheral_minor_class minor)
537 struct bt_hid_device_s *s = qemu_mallocz(sizeof(*s));
543 (5 << 8) | /* "Peripheral" */
544 /* Service classes */
545 (1 << 13) | /* Limited discoverable mode */
546 (1 << 19); /* Capturing device (?) */
548 bt_l2cap_device_init(&s->btdev, net);
549 bt_l2cap_sdp_init(&s->btdev);
550 bt_l2cap_psm_register(&s->btdev, BT_PSM_HID_CTRL,
551 BT_HID_MTU, bt_hid_new_control_ch);
552 bt_l2cap_psm_register(&s->btdev, BT_PSM_HID_INTR,
553 BT_HID_MTU, bt_hid_new_interrupt_ch);
556 s->btdev.device.lmp_name = s->usbdev->devname;
557 usb_hid_datain_cb(s->usbdev, s, bt_hid_datain);
559 s->btdev.device.handle_destroy = bt_hid_destroy;
561 s->btdev.device.class[0] = (class >> 0) & 0xff;
562 s->btdev.device.class[1] = (class >> 8) & 0xff;
563 s->btdev.device.class[2] = (class >> 16) & 0xff;
565 return &s->btdev.device;
568 struct bt_device_s *bt_keyboard_init(struct bt_scatternet_s *net)
570 return bt_hid_init(net, usb_keyboard_init(), class_keyboard);