161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/hci_lib.h>
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#include "csr.h"
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static uint16_t seqnum = 0x0000;
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static int dd = -1;
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int csr_open_hci(char *device)
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{
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struct hci_dev_info di;
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struct hci_version ver;
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int dev = 0;
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if (device) {
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dev = hci_devid(device);
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if (dev < 0) {
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fprintf(stderr, "Device not available\n");
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return -1;
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}
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}
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dd = hci_open_dev(dev);
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if (dd < 0) {
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fprintf(stderr, "Can't open device hci%d: %s (%d)\n",
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dev, strerror(errno), errno);
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return -1;
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}
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if (hci_devinfo(dev, &di) < 0) {
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fprintf(stderr, "Can't get device info for hci%d: %s (%d)\n",
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dev, strerror(errno), errno);
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hci_close_dev(dd);
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return -1;
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}
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if (hci_read_local_version(dd, &ver, 1000) < 0) {
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fprintf(stderr, "Can't read version info for hci%d: %s (%d)\n",
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dev, strerror(errno), errno);
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hci_close_dev(dd);
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return -1;
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}
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if (ver.manufacturer != 10) {
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fprintf(stderr, "Unsupported manufacturer\n");
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hci_close_dev(dd);
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return -1;
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}
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return 0;
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}
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static int do_command(uint16_t command, uint16_t seqnum, uint16_t varid, uint8_t *value, uint16_t length)
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{
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unsigned char cp[254], rp[254];
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struct hci_request rq;
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uint8_t cmd[10];
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uint16_t size;
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size = (length < 8) ? 9 : ((length + 1) / 2) + 5;
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cmd[0] = command & 0xff;
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cmd[1] = command >> 8;
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cmd[2] = size & 0xff;
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cmd[3] = size >> 8;
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cmd[4] = seqnum & 0xff;
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cmd[5] = seqnum >> 8;
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cmd[6] = varid & 0xff;
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cmd[7] = varid >> 8;
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cmd[8] = 0x00;
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cmd[9] = 0x00;
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memset(cp, 0, sizeof(cp));
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cp[0] = 0xc2;
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memcpy(cp + 1, cmd, sizeof(cmd));
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memcpy(cp + 11, value, length);
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switch (varid) {
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case CSR_VARID_COLD_RESET:
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case CSR_VARID_WARM_RESET:
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case CSR_VARID_COLD_HALT:
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case CSR_VARID_WARM_HALT:
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return hci_send_cmd(dd, OGF_VENDOR_CMD, 0x00, (size * 2) + 1, cp);
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}
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memset(&rq, 0, sizeof(rq));
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rq.ogf = OGF_VENDOR_CMD;
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rq.ocf = 0x00;
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rq.event = EVT_VENDOR;
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rq.cparam = cp;
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rq.clen = (size * 2) + 1;
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rq.rparam = rp;
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rq.rlen = sizeof(rp);
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if (hci_send_req(dd, &rq, 2000) < 0)
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return -1;
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if (rp[0] != 0xc2) {
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errno = EIO;
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return -1;
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}
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if ((rp[9] + (rp[10] << 8)) != 0) {
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errno = ENXIO;
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return -1;
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}
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memcpy(value, rp + 11, length);
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return 0;
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}
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int csr_read_hci(uint16_t varid, uint8_t *value, uint16_t length)
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{
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return do_command(0x0000, seqnum++, varid, value, length);
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}
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int csr_write_hci(uint16_t varid, uint8_t *value, uint16_t length)
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{
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return do_command(0x0002, seqnum++, varid, value, length);
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}
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void csr_close_hci(void)
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{
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hci_close_dev(dd);
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}
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