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 along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "qemu-common.h"
26 enum hid_transaction_req {
31 BT_GET_PROTOCOL = 0x6,
32 BT_SET_PROTOCOL = 0x7,
39 enum hid_transaction_handshake {
40 BT_HS_SUCCESSFUL = 0x0,
41 BT_HS_NOT_READY = 0x1,
42 BT_HS_ERR_INVALID_REPORT_ID = 0x2,
43 BT_HS_ERR_UNSUPPORTED_REQUEST = 0x3,
44 BT_HS_ERR_INVALID_PARAMETER = 0x4,
45 BT_HS_ERR_UNKNOWN = 0xe,
46 BT_HS_ERR_FATAL = 0xf,
49 enum hid_transaction_control {
51 BT_HC_HARD_RESET = 0x1,
52 BT_HC_SOFT_RESET = 0x2,
54 BT_HC_EXIT_SUSPEND = 0x4,
55 BT_HC_VIRTUAL_CABLE_UNPLUG = 0x5,
59 BT_HID_PROTO_BOOT = 0,
60 BT_HID_PROTO_REPORT = 1,
63 enum hid_boot_reportid {
64 BT_HID_BOOT_INVALID = 0,
78 /* HID interface requests */
79 #define GET_REPORT 0xa101
80 #define GET_IDLE 0xa102
81 #define GET_PROTOCOL 0xa103
82 #define SET_REPORT 0x2109
83 #define SET_IDLE 0x210a
84 #define SET_PROTOCOL 0x210b
86 struct bt_hid_device_s {
87 struct bt_l2cap_device_s btdev;
88 struct bt_l2cap_conn_params_s *control;
89 struct bt_l2cap_conn_params_s *interrupt;
99 } dataother, datain, dataout, feature, intrdataout;
102 bt_state_transaction,
107 static void bt_hid_reset(struct bt_hid_device_s *s)
109 struct bt_scatternet_s *net = s->btdev.device.net;
111 /* Go as far as... */
112 bt_l2cap_device_done(&s->btdev);
113 bt_l2cap_device_init(&s->btdev, net);
115 s->usbdev->handle_reset(s->usbdev);
116 s->proto = BT_HID_PROTO_REPORT;
117 s->state = bt_state_ready;
118 s->dataother.len = 0;
122 s->intrdataout.len = 0;
126 static int bt_hid_out(struct bt_hid_device_s *s)
130 if (s->data_type == BT_DATA_OUTPUT) {
131 p.pid = USB_TOKEN_OUT;
133 p.data = s->dataout.buffer;
134 p.len = s->dataout.len;
135 s->dataout.len = s->usbdev->handle_data(s->usbdev, &p);
137 return s->dataout.len;
140 if (s->data_type == BT_DATA_FEATURE) {
142 * does this send a USB_REQ_CLEAR_FEATURE/USB_REQ_SET_FEATURE
143 * or a SET_REPORT? */
150 static int bt_hid_in(struct bt_hid_device_s *s)
154 p.pid = USB_TOKEN_IN;
156 p.data = s->datain.buffer;
157 p.len = sizeof(s->datain.buffer);
158 s->datain.len = s->usbdev->handle_data(s->usbdev, &p);
160 return s->datain.len;
163 static void bt_hid_send_handshake(struct bt_hid_device_s *s, int result)
165 *s->control->sdu_out(s->control, 1) =
166 (BT_HANDSHAKE << 4) | result;
167 s->control->sdu_submit(s->control);
170 static void bt_hid_send_control(struct bt_hid_device_s *s, int operation)
172 *s->control->sdu_out(s->control, 1) =
173 (BT_HID_CONTROL << 4) | operation;
174 s->control->sdu_submit(s->control);
177 static void bt_hid_disconnect(struct bt_hid_device_s *s)
179 /* Disconnect s->control and s->interrupt */
182 static void bt_hid_send_data(struct bt_l2cap_conn_params_s *ch, int type,
183 const uint8_t *data, int len)
185 uint8_t *pkt, hdr = (BT_DATA << 4) | type;
189 plen = MIN(len, ch->remote_mtu - 1);
190 pkt = ch->sdu_out(ch, plen + 1);
194 memcpy(pkt + 1, data, plen);
199 hdr = (BT_DATC << 4) | type;
200 } while (plen == ch->remote_mtu - 1);
203 static void bt_hid_control_transaction(struct bt_hid_device_s *s,
204 const uint8_t *data, int len)
206 uint8_t type, parameter;
212 parameter = data[0] & 0xf;
219 /* These are not expected to be sent this direction. */
220 ret = BT_HS_ERR_INVALID_PARAMETER;
225 if (len != 1 || (parameter != BT_HC_VIRTUAL_CABLE_UNPLUG &&
226 s->state == bt_state_transaction)) {
227 ret = BT_HS_ERR_INVALID_PARAMETER;
233 case BT_HC_HARD_RESET:
234 case BT_HC_SOFT_RESET:
238 if (s->state == bt_state_ready)
239 s->state = bt_state_suspend;
241 ret = BT_HS_ERR_INVALID_PARAMETER;
243 case BT_HC_EXIT_SUSPEND:
244 if (s->state == bt_state_suspend)
245 s->state = bt_state_ready;
247 ret = BT_HS_ERR_INVALID_PARAMETER;
249 case BT_HC_VIRTUAL_CABLE_UNPLUG:
250 bt_hid_disconnect(s);
253 ret = BT_HS_ERR_INVALID_PARAMETER;
258 /* No ReportIDs declared. */
259 if (((parameter & 8) && len != 3) ||
260 (!(parameter & 8) && len != 1) ||
261 s->state != bt_state_ready) {
262 ret = BT_HS_ERR_INVALID_PARAMETER;
266 rlen = data[2] | (data[3] << 8);
269 switch (parameter & 3) {
271 ret = BT_HS_ERR_INVALID_PARAMETER;
274 /* Here we can as well poll s->usbdev */
275 bt_hid_send_data(s->control, BT_DATA_INPUT,
276 s->datain.buffer, MIN(rlen, s->datain.len));
279 bt_hid_send_data(s->control, BT_DATA_OUTPUT,
280 s->dataout.buffer, MIN(rlen, s->dataout.len));
282 case BT_DATA_FEATURE:
283 bt_hid_send_data(s->control, BT_DATA_FEATURE,
284 s->feature.buffer, MIN(rlen, s->feature.len));
290 if (len < 2 || len > BT_HID_MTU || s->state != bt_state_ready ||
291 (parameter & 3) == BT_DATA_OTHER ||
292 (parameter & 3) == BT_DATA_INPUT) {
293 ret = BT_HS_ERR_INVALID_PARAMETER;
296 s->data_type = parameter & 3;
297 if (s->data_type == BT_DATA_OUTPUT) {
298 s->dataout.len = len - 1;
299 memcpy(s->dataout.buffer, data + 1, s->dataout.len);
301 s->feature.len = len - 1;
302 memcpy(s->feature.buffer, data + 1, s->feature.len);
304 if (len == BT_HID_MTU)
305 s->state = bt_state_transaction;
310 case BT_GET_PROTOCOL:
311 if (len != 1 || s->state == bt_state_transaction) {
312 ret = BT_HS_ERR_INVALID_PARAMETER;
315 *s->control->sdu_out(s->control, 1) = s->proto;
316 s->control->sdu_submit(s->control);
319 case BT_SET_PROTOCOL:
320 if (len != 1 || s->state == bt_state_transaction ||
321 (parameter != BT_HID_PROTO_BOOT &&
322 parameter != BT_HID_PROTO_REPORT)) {
323 ret = BT_HS_ERR_INVALID_PARAMETER;
326 s->proto = parameter;
327 s->usbdev->handle_control(s->usbdev, SET_PROTOCOL, s->proto, 0, 0, 0);
328 ret = BT_HS_SUCCESSFUL;
332 if (len != 1 || s->state == bt_state_transaction) {
333 ret = BT_HS_ERR_INVALID_PARAMETER;
336 s->usbdev->handle_control(s->usbdev, GET_IDLE, 0, 0, 1,
337 s->control->sdu_out(s->control, 1));
338 s->control->sdu_submit(s->control);
342 if (len != 2 || s->state == bt_state_transaction) {
343 ret = BT_HS_ERR_INVALID_PARAMETER;
347 /* We don't need to know about the Idle Rate here really,
348 * so just pass it on to the device. */
349 ret = s->usbdev->handle_control(s->usbdev,
350 SET_IDLE, data[1], 0, 0, 0) ?
351 BT_HS_SUCCESSFUL : BT_HS_ERR_INVALID_PARAMETER;
352 /* XXX: Does this generate a handshake? */
356 if (len > BT_HID_MTU || s->state != bt_state_transaction) {
357 ret = BT_HS_ERR_INVALID_PARAMETER;
360 if (s->data_type == BT_DATA_OUTPUT) {
361 memcpy(s->dataout.buffer + s->dataout.len, data + 1, len - 1);
362 s->dataout.len += len - 1;
364 memcpy(s->feature.buffer + s->feature.len, data + 1, len - 1);
365 s->feature.len += len - 1;
367 if (len < BT_HID_MTU) {
369 s->state = bt_state_ready;
374 ret = BT_HS_ERR_UNSUPPORTED_REQUEST;
378 bt_hid_send_handshake(s, ret);
381 static void bt_hid_control_sdu(void *opaque, const uint8_t *data, int len)
383 struct bt_hid_device_s *hid = opaque;
385 return bt_hid_control_transaction(hid, data, len);
388 static void bt_hid_datain(void *opaque)
390 struct bt_hid_device_s *hid = opaque;
392 /* If suspended, wake-up and send a wake-up event first. We might
393 * want to also inspect the input report and ignore event like
394 * mouse movements until a button event occurs. */
395 if (hid->state == bt_state_suspend) {
396 hid->state = bt_state_ready;
399 if (bt_hid_in(hid) > 0)
400 /* TODO: when in boot-mode precede any Input reports with the ReportID
401 * byte, here and in GetReport/SetReport on the Control channel. */
402 bt_hid_send_data(hid->interrupt, BT_DATA_INPUT,
403 hid->datain.buffer, hid->datain.len);
406 static void bt_hid_interrupt_sdu(void *opaque, const uint8_t *data, int len)
408 struct bt_hid_device_s *hid = opaque;
410 if (len > BT_HID_MTU || len < 1)
412 if ((data[0] & 3) != BT_DATA_OUTPUT)
414 if ((data[0] >> 4) == BT_DATA) {
418 hid->data_type = BT_DATA_OUTPUT;
419 hid->intrdataout.len = 0;
420 } else if ((data[0] >> 4) == BT_DATC) {
421 if (!hid->intr_state)
426 memcpy(hid->intrdataout.buffer + hid->intrdataout.len, data + 1, len - 1);
427 hid->intrdataout.len += len - 1;
428 hid->intr_state = (len == BT_HID_MTU);
429 if (!hid->intr_state) {
430 memcpy(hid->dataout.buffer, hid->intrdataout.buffer,
431 hid->dataout.len = hid->intrdataout.len);
437 fprintf(stderr, "%s: bad transaction on Interrupt channel.\n",
441 /* "Virtual cable" plug/unplug event. */
442 static void bt_hid_connected_update(struct bt_hid_device_s *hid)
444 int prev = hid->connected;
446 hid->connected = hid->control && hid->interrupt;
448 /* Stop page-/inquiry-scanning when a host is connected. */
449 hid->btdev.device.page_scan = !hid->connected;
450 hid->btdev.device.inquiry_scan = !hid->connected;
452 if (hid->connected && !prev) {
453 hid->usbdev->handle_reset(hid->usbdev);
454 hid->proto = BT_HID_PROTO_REPORT;
457 /* Should set HIDVirtualCable in SDP (possibly need to check that SDP
458 * isn't destroyed yet, in case we're being called from handle_destroy) */
461 static void bt_hid_close_control(void *opaque)
463 struct bt_hid_device_s *hid = opaque;
466 bt_hid_connected_update(hid);
469 static void bt_hid_close_interrupt(void *opaque)
471 struct bt_hid_device_s *hid = opaque;
474 bt_hid_connected_update(hid);
477 static int bt_hid_new_control_ch(struct bt_l2cap_device_s *dev,
478 struct bt_l2cap_conn_params_s *params)
480 struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev;
485 hid->control = params;
486 hid->control->opaque = hid;
487 hid->control->close = bt_hid_close_control;
488 hid->control->sdu_in = bt_hid_control_sdu;
490 bt_hid_connected_update(hid);
495 static int bt_hid_new_interrupt_ch(struct bt_l2cap_device_s *dev,
496 struct bt_l2cap_conn_params_s *params)
498 struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev;
503 hid->interrupt = params;
504 hid->interrupt->opaque = hid;
505 hid->interrupt->close = bt_hid_close_interrupt;
506 hid->interrupt->sdu_in = bt_hid_interrupt_sdu;
508 bt_hid_connected_update(hid);
513 static void bt_hid_destroy(struct bt_device_s *dev)
515 struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev;
518 bt_hid_send_control(hid, BT_HC_VIRTUAL_CABLE_UNPLUG);
519 bt_l2cap_device_done(&hid->btdev);
521 hid->usbdev->handle_destroy(hid->usbdev);
526 enum peripheral_minor_class {
527 class_other = 0 << 4,
528 class_keyboard = 1 << 4,
529 class_pointing = 2 << 4,
530 class_combo = 3 << 4,
533 static struct bt_device_s *bt_hid_init(struct bt_scatternet_s *net,
534 USBDevice *dev, enum peripheral_minor_class minor)
536 struct bt_hid_device_s *s = qemu_mallocz(sizeof(*s));
542 (5 << 8) | /* "Peripheral" */
543 /* Service classes */
544 (1 << 13) | /* Limited discoverable mode */
545 (1 << 19); /* Capturing device (?) */
547 bt_l2cap_device_init(&s->btdev, net);
548 bt_l2cap_sdp_init(&s->btdev);
549 bt_l2cap_psm_register(&s->btdev, BT_PSM_HID_CTRL,
550 BT_HID_MTU, bt_hid_new_control_ch);
551 bt_l2cap_psm_register(&s->btdev, BT_PSM_HID_INTR,
552 BT_HID_MTU, bt_hid_new_interrupt_ch);
555 s->btdev.device.lmp_name = s->usbdev->devname;
556 usb_hid_datain_cb(s->usbdev, s, bt_hid_datain);
558 s->btdev.device.handle_destroy = bt_hid_destroy;
560 s->btdev.device.class[0] = (class >> 0) & 0xff;
561 s->btdev.device.class[1] = (class >> 8) & 0xff;
562 s->btdev.device.class[2] = (class >> 16) & 0xff;
564 return &s->btdev.device;
567 struct bt_device_s *bt_keyboard_init(struct bt_scatternet_s *net)
569 return bt_hid_init(net, usb_keyboard_init(), class_keyboard);