root / hw / bt-hid.c @ 806b6024
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/*
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* QEMU Bluetooth HID Profile wrapper for USB HID.
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*
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* Copyright (C) 2007-2008 OpenMoko, Inc.
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* Written by Andrzej Zaborowski <andrew@openedhand.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu-common.h" |
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#include "usb.h" |
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#include "bt.h" |
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enum hid_transaction_req {
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BT_HANDSHAKE = 0x0,
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BT_HID_CONTROL = 0x1,
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BT_GET_REPORT = 0x4,
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BT_SET_REPORT = 0x5,
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BT_GET_PROTOCOL = 0x6,
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BT_SET_PROTOCOL = 0x7,
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BT_GET_IDLE = 0x8,
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BT_SET_IDLE = 0x9,
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BT_DATA = 0xa,
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BT_DATC = 0xb,
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}; |
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enum hid_transaction_handshake {
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BT_HS_SUCCESSFUL = 0x0,
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BT_HS_NOT_READY = 0x1,
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BT_HS_ERR_INVALID_REPORT_ID = 0x2,
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BT_HS_ERR_UNSUPPORTED_REQUEST = 0x3,
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BT_HS_ERR_INVALID_PARAMETER = 0x4,
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BT_HS_ERR_UNKNOWN = 0xe,
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BT_HS_ERR_FATAL = 0xf,
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}; |
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enum hid_transaction_control {
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BT_HC_NOP = 0x0,
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BT_HC_HARD_RESET = 0x1,
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BT_HC_SOFT_RESET = 0x2,
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BT_HC_SUSPEND = 0x3,
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BT_HC_EXIT_SUSPEND = 0x4,
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BT_HC_VIRTUAL_CABLE_UNPLUG = 0x5,
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}; |
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enum hid_protocol {
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BT_HID_PROTO_BOOT = 0,
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BT_HID_PROTO_REPORT = 1,
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}; |
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enum hid_boot_reportid {
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BT_HID_BOOT_INVALID = 0,
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BT_HID_BOOT_KEYBOARD, |
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BT_HID_BOOT_MOUSE, |
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}; |
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enum hid_data_pkt {
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BT_DATA_OTHER = 0,
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BT_DATA_INPUT, |
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BT_DATA_OUTPUT, |
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BT_DATA_FEATURE, |
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}; |
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#define BT_HID_MTU 48 |
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/* HID interface requests */
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#define GET_REPORT 0xa101 |
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#define GET_IDLE 0xa102 |
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#define GET_PROTOCOL 0xa103 |
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#define SET_REPORT 0x2109 |
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#define SET_IDLE 0x210a |
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#define SET_PROTOCOL 0x210b |
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struct bt_hid_device_s {
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struct bt_l2cap_device_s btdev;
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struct bt_l2cap_conn_params_s *control;
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struct bt_l2cap_conn_params_s *interrupt;
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USBDevice *usbdev; |
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int proto;
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int connected;
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int data_type;
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int intr_state;
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struct {
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int len;
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uint8_t buffer[1024];
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} dataother, datain, dataout, feature, intrdataout; |
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enum {
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bt_state_ready, |
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bt_state_transaction, |
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bt_state_suspend, |
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} state; |
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}; |
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static void bt_hid_reset(struct bt_hid_device_s *s) |
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{
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struct bt_scatternet_s *net = s->btdev.device.net;
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/* Go as far as... */
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bt_l2cap_device_done(&s->btdev); |
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bt_l2cap_device_init(&s->btdev, net); |
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s->usbdev->info->handle_reset(s->usbdev); |
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s->proto = BT_HID_PROTO_REPORT; |
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s->state = bt_state_ready; |
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s->dataother.len = 0;
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s->datain.len = 0;
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s->dataout.len = 0;
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s->feature.len = 0;
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s->intrdataout.len = 0;
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s->intr_state = 0;
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} |
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static int bt_hid_out(struct bt_hid_device_s *s) |
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{
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USBPacket p; |
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if (s->data_type == BT_DATA_OUTPUT) {
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p.pid = USB_TOKEN_OUT; |
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p.devep = 1;
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p.data = s->dataout.buffer; |
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p.len = s->dataout.len; |
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s->dataout.len = s->usbdev->info->handle_data(s->usbdev, &p); |
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return s->dataout.len;
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} |
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if (s->data_type == BT_DATA_FEATURE) {
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/* XXX:
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* does this send a USB_REQ_CLEAR_FEATURE/USB_REQ_SET_FEATURE
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* or a SET_REPORT? */
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p.devep = 0;
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} |
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return -1; |
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} |
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static int bt_hid_in(struct bt_hid_device_s *s) |
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{
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USBPacket p; |
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p.pid = USB_TOKEN_IN; |
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p.devep = 1;
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p.data = s->datain.buffer; |
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p.len = sizeof(s->datain.buffer);
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s->datain.len = s->usbdev->info->handle_data(s->usbdev, &p); |
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return s->datain.len;
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} |
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static void bt_hid_send_handshake(struct bt_hid_device_s *s, int result) |
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{
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*s->control->sdu_out(s->control, 1) =
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(BT_HANDSHAKE << 4) | result;
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s->control->sdu_submit(s->control); |
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} |
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static void bt_hid_send_control(struct bt_hid_device_s *s, int operation) |
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{
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*s->control->sdu_out(s->control, 1) =
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(BT_HID_CONTROL << 4) | operation;
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s->control->sdu_submit(s->control); |
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} |
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static void bt_hid_disconnect(struct bt_hid_device_s *s) |
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{
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/* Disconnect s->control and s->interrupt */
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} |
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static void bt_hid_send_data(struct bt_l2cap_conn_params_s *ch, int type, |
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const uint8_t *data, int len) |
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{
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uint8_t *pkt, hdr = (BT_DATA << 4) | type;
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int plen;
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do {
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plen = MIN(len, ch->remote_mtu - 1);
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pkt = ch->sdu_out(ch, plen + 1);
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pkt[0] = hdr;
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if (plen)
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memcpy(pkt + 1, data, plen);
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ch->sdu_submit(ch); |
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len -= plen; |
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data += plen; |
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hdr = (BT_DATC << 4) | type;
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} while (plen == ch->remote_mtu - 1); |
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} |
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static void bt_hid_control_transaction(struct bt_hid_device_s *s, |
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const uint8_t *data, int len) |
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{
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uint8_t type, parameter; |
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int rlen, ret = -1; |
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if (len < 1) |
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return;
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type = data[0] >> 4; |
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parameter = data[0] & 0xf; |
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switch (type) {
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case BT_HANDSHAKE:
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case BT_DATA:
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switch (parameter) {
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default:
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/* These are not expected to be sent this direction. */
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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} |
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break;
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case BT_HID_CONTROL:
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if (len != 1 || (parameter != BT_HC_VIRTUAL_CABLE_UNPLUG && |
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s->state == bt_state_transaction)) {
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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break;
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} |
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switch (parameter) {
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case BT_HC_NOP:
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break;
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case BT_HC_HARD_RESET:
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case BT_HC_SOFT_RESET:
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bt_hid_reset(s); |
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break;
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case BT_HC_SUSPEND:
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if (s->state == bt_state_ready)
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s->state = bt_state_suspend; |
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else
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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break;
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case BT_HC_EXIT_SUSPEND:
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if (s->state == bt_state_suspend)
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s->state = bt_state_ready; |
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else
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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break;
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case BT_HC_VIRTUAL_CABLE_UNPLUG:
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bt_hid_disconnect(s); |
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break;
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default:
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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} |
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break;
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|
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case BT_GET_REPORT:
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/* No ReportIDs declared. */
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if (((parameter & 8) && len != 3) || |
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(!(parameter & 8) && len != 1) || |
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s->state != bt_state_ready) {
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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break;
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} |
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if (parameter & 8) |
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rlen = data[2] | (data[3] << 8); |
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else
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rlen = INT_MAX; |
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switch (parameter & 3) { |
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case BT_DATA_OTHER:
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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break;
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case BT_DATA_INPUT:
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/* Here we can as well poll s->usbdev */
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bt_hid_send_data(s->control, BT_DATA_INPUT, |
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s->datain.buffer, MIN(rlen, s->datain.len)); |
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break;
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case BT_DATA_OUTPUT:
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bt_hid_send_data(s->control, BT_DATA_OUTPUT, |
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s->dataout.buffer, MIN(rlen, s->dataout.len)); |
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break;
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case BT_DATA_FEATURE:
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bt_hid_send_data(s->control, BT_DATA_FEATURE, |
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s->feature.buffer, MIN(rlen, s->feature.len)); |
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break;
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} |
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break;
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|
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case BT_SET_REPORT:
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if (len < 2 || len > BT_HID_MTU || s->state != bt_state_ready || |
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(parameter & 3) == BT_DATA_OTHER ||
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(parameter & 3) == BT_DATA_INPUT) {
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ret = BT_HS_ERR_INVALID_PARAMETER; |
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break;
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} |
| 295 |
s->data_type = parameter & 3;
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if (s->data_type == BT_DATA_OUTPUT) {
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s->dataout.len = len - 1;
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memcpy(s->dataout.buffer, data + 1, s->dataout.len);
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} else {
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s->feature.len = len - 1;
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memcpy(s->feature.buffer, data + 1, s->feature.len);
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} |
| 303 |
if (len == BT_HID_MTU)
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| 304 |
s->state = bt_state_transaction; |
| 305 |
else
|
| 306 |
bt_hid_out(s); |
| 307 |
break;
|
| 308 |
|
| 309 |
case BT_GET_PROTOCOL:
|
| 310 |
if (len != 1 || s->state == bt_state_transaction) { |
| 311 |
ret = BT_HS_ERR_INVALID_PARAMETER; |
| 312 |
break;
|
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} |
| 314 |
*s->control->sdu_out(s->control, 1) = s->proto;
|
| 315 |
s->control->sdu_submit(s->control); |
| 316 |
break;
|
| 317 |
|
| 318 |
case BT_SET_PROTOCOL:
|
| 319 |
if (len != 1 || s->state == bt_state_transaction || |
| 320 |
(parameter != BT_HID_PROTO_BOOT && |
| 321 |
parameter != BT_HID_PROTO_REPORT)) {
|
| 322 |
ret = BT_HS_ERR_INVALID_PARAMETER; |
| 323 |
break;
|
| 324 |
} |
| 325 |
s->proto = parameter; |
| 326 |
s->usbdev->info->handle_control(s->usbdev, SET_PROTOCOL, s->proto, 0, 0, |
| 327 |
NULL);
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| 328 |
ret = BT_HS_SUCCESSFUL; |
| 329 |
break;
|
| 330 |
|
| 331 |
case BT_GET_IDLE:
|
| 332 |
if (len != 1 || s->state == bt_state_transaction) { |
| 333 |
ret = BT_HS_ERR_INVALID_PARAMETER; |
| 334 |
break;
|
| 335 |
} |
| 336 |
s->usbdev->info->handle_control(s->usbdev, GET_IDLE, 0, 0, 1, |
| 337 |
s->control->sdu_out(s->control, 1));
|
| 338 |
s->control->sdu_submit(s->control); |
| 339 |
break;
|
| 340 |
|
| 341 |
case BT_SET_IDLE:
|
| 342 |
if (len != 2 || s->state == bt_state_transaction) { |
| 343 |
ret = BT_HS_ERR_INVALID_PARAMETER; |
| 344 |
break;
|
| 345 |
} |
| 346 |
|
| 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->info->handle_control(s->usbdev, |
| 350 |
SET_IDLE, data[1], 0, 0, NULL) ? |
| 351 |
BT_HS_SUCCESSFUL : BT_HS_ERR_INVALID_PARAMETER; |
| 352 |
/* XXX: Does this generate a handshake? */
|
| 353 |
break;
|
| 354 |
|
| 355 |
case BT_DATC:
|
| 356 |
if (len > BT_HID_MTU || s->state != bt_state_transaction) {
|
| 357 |
ret = BT_HS_ERR_INVALID_PARAMETER; |
| 358 |
break;
|
| 359 |
} |
| 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;
|
| 363 |
} else {
|
| 364 |
memcpy(s->feature.buffer + s->feature.len, data + 1, len - 1); |
| 365 |
s->feature.len += len - 1;
|
| 366 |
} |
| 367 |
if (len < BT_HID_MTU) {
|
| 368 |
bt_hid_out(s); |
| 369 |
s->state = bt_state_ready; |
| 370 |
} |
| 371 |
break;
|
| 372 |
|
| 373 |
default:
|
| 374 |
ret = BT_HS_ERR_UNSUPPORTED_REQUEST; |
| 375 |
} |
| 376 |
|
| 377 |
if (ret != -1) |
| 378 |
bt_hid_send_handshake(s, ret); |
| 379 |
} |
| 380 |
|
| 381 |
static void bt_hid_control_sdu(void *opaque, const uint8_t *data, int len) |
| 382 |
{
|
| 383 |
struct bt_hid_device_s *hid = opaque;
|
| 384 |
|
| 385 |
bt_hid_control_transaction(hid, data, len); |
| 386 |
} |
| 387 |
|
| 388 |
static void bt_hid_datain(void *opaque) |
| 389 |
{
|
| 390 |
struct bt_hid_device_s *hid = opaque;
|
| 391 |
|
| 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; |
| 397 |
} |
| 398 |
|
| 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); |
| 404 |
} |
| 405 |
|
| 406 |
static void bt_hid_interrupt_sdu(void *opaque, const uint8_t *data, int len) |
| 407 |
{
|
| 408 |
struct bt_hid_device_s *hid = opaque;
|
| 409 |
|
| 410 |
if (len > BT_HID_MTU || len < 1) |
| 411 |
goto bad;
|
| 412 |
if ((data[0] & 3) != BT_DATA_OUTPUT) |
| 413 |
goto bad;
|
| 414 |
if ((data[0] >> 4) == BT_DATA) { |
| 415 |
if (hid->intr_state)
|
| 416 |
goto bad;
|
| 417 |
|
| 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)
|
| 422 |
goto bad;
|
| 423 |
} else
|
| 424 |
goto bad;
|
| 425 |
|
| 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); |
| 432 |
bt_hid_out(hid); |
| 433 |
} |
| 434 |
|
| 435 |
return;
|
| 436 |
bad:
|
| 437 |
fprintf(stderr, "%s: bad transaction on Interrupt channel.\n",
|
| 438 |
__FUNCTION__); |
| 439 |
} |
| 440 |
|
| 441 |
/* "Virtual cable" plug/unplug event. */
|
| 442 |
static void bt_hid_connected_update(struct bt_hid_device_s *hid) |
| 443 |
{
|
| 444 |
int prev = hid->connected;
|
| 445 |
|
| 446 |
hid->connected = hid->control && hid->interrupt; |
| 447 |
|
| 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; |
| 451 |
|
| 452 |
if (hid->connected && !prev) {
|
| 453 |
hid->usbdev->info->handle_reset(hid->usbdev); |
| 454 |
hid->proto = BT_HID_PROTO_REPORT; |
| 455 |
} |
| 456 |
|
| 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) */
|
| 459 |
} |
| 460 |
|
| 461 |
static void bt_hid_close_control(void *opaque) |
| 462 |
{
|
| 463 |
struct bt_hid_device_s *hid = opaque;
|
| 464 |
|
| 465 |
hid->control = NULL;
|
| 466 |
bt_hid_connected_update(hid); |
| 467 |
} |
| 468 |
|
| 469 |
static void bt_hid_close_interrupt(void *opaque) |
| 470 |
{
|
| 471 |
struct bt_hid_device_s *hid = opaque;
|
| 472 |
|
| 473 |
hid->interrupt = NULL;
|
| 474 |
bt_hid_connected_update(hid); |
| 475 |
} |
| 476 |
|
| 477 |
static int bt_hid_new_control_ch(struct bt_l2cap_device_s *dev, |
| 478 |
struct bt_l2cap_conn_params_s *params)
|
| 479 |
{
|
| 480 |
struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev; |
| 481 |
|
| 482 |
if (hid->control)
|
| 483 |
return 1; |
| 484 |
|
| 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; |
| 489 |
|
| 490 |
bt_hid_connected_update(hid); |
| 491 |
|
| 492 |
return 0; |
| 493 |
} |
| 494 |
|
| 495 |
static int bt_hid_new_interrupt_ch(struct bt_l2cap_device_s *dev, |
| 496 |
struct bt_l2cap_conn_params_s *params)
|
| 497 |
{
|
| 498 |
struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev; |
| 499 |
|
| 500 |
if (hid->interrupt)
|
| 501 |
return 1; |
| 502 |
|
| 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; |
| 507 |
|
| 508 |
bt_hid_connected_update(hid); |
| 509 |
|
| 510 |
return 0; |
| 511 |
} |
| 512 |
|
| 513 |
static void bt_hid_destroy(struct bt_device_s *dev) |
| 514 |
{
|
| 515 |
struct bt_hid_device_s *hid = (struct bt_hid_device_s *) dev; |
| 516 |
|
| 517 |
if (hid->connected)
|
| 518 |
bt_hid_send_control(hid, BT_HC_VIRTUAL_CABLE_UNPLUG); |
| 519 |
bt_l2cap_device_done(&hid->btdev); |
| 520 |
|
| 521 |
hid->usbdev->info->handle_destroy(hid->usbdev); |
| 522 |
|
| 523 |
qemu_free(hid); |
| 524 |
} |
| 525 |
|
| 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, |
| 531 |
}; |
| 532 |
|
| 533 |
static struct bt_device_s *bt_hid_init(struct bt_scatternet_s *net, |
| 534 |
USBDevice *dev, enum peripheral_minor_class minor)
|
| 535 |
{
|
| 536 |
struct bt_hid_device_s *s = qemu_mallocz(sizeof(*s)); |
| 537 |
uint32_t class = |
| 538 |
/* Format type */
|
| 539 |
(0 << 0) | |
| 540 |
/* Device class */
|
| 541 |
(minor << 2) |
|
| 542 |
(5 << 8) | /* "Peripheral" */ |
| 543 |
/* Service classes */
|
| 544 |
(1 << 13) | /* Limited discoverable mode */ |
| 545 |
(1 << 19); /* Capturing device (?) */ |
| 546 |
|
| 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); |
| 553 |
|
| 554 |
s->usbdev = dev; |
| 555 |
s->btdev.device.lmp_name = s->usbdev->devname; |
| 556 |
usb_hid_datain_cb(s->usbdev, s, bt_hid_datain); |
| 557 |
|
| 558 |
s->btdev.device.handle_destroy = bt_hid_destroy; |
| 559 |
|
| 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; |
| 563 |
|
| 564 |
return &s->btdev.device;
|
| 565 |
} |
| 566 |
|
| 567 |
struct bt_device_s *bt_keyboard_init(struct bt_scatternet_s *net) |
| 568 |
{
|
| 569 |
return bt_hid_init(net, usb_keyboard_init(), class_keyboard);
|
| 570 |
} |