1/*
2 *
3 *  BlueZ - Bluetooth protocol stack for Linux
4 *
5 *  Copyright (C) 2004-2010  Marcel Holtmann <marcel@holtmann.org>
6 *
7 *
8 *  This program is free software; you can redistribute it and/or modify
9 *  it under the terms of the GNU General Public License as published by
10 *  the Free Software Foundation; either version 2 of the License, or
11 *  (at your option) any later version.
12 *
13 *  This program is distributed in the hope that it will be useful,
14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *  GNU General Public License for more details.
17 *
18 *  You should have received a copy of the GNU General Public License
19 *  along with this program; if not, write to the Free Software
20 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
21 *
22 */
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27
28#include <stdio.h>
29#include <errno.h>
30#include <string.h>
31#include <sys/socket.h>
32
33#include <bluetooth/bluetooth.h>
34#include <bluetooth/hci.h>
35#include <bluetooth/hci_lib.h>
36
37#include "csr.h"
38
39static uint16_t seqnum = 0x0000;
40
41static int dd = -1;
42
43int csr_open_hci(char *device)
44{
45	struct hci_dev_info di;
46	struct hci_version ver;
47	int dev = 0;
48
49	if (device) {
50		dev = hci_devid(device);
51		if (dev < 0) {
52			fprintf(stderr, "Device not available\n");
53			return -1;
54		}
55	}
56
57	dd = hci_open_dev(dev);
58	if (dd < 0) {
59		fprintf(stderr, "Can't open device hci%d: %s (%d)\n",
60						dev, strerror(errno), errno);
61		return -1;
62	}
63
64	if (hci_devinfo(dev, &di) < 0) {
65		fprintf(stderr, "Can't get device info for hci%d: %s (%d)\n",
66						dev, strerror(errno), errno);
67		hci_close_dev(dd);
68		return -1;
69	}
70
71	if (hci_read_local_version(dd, &ver, 1000) < 0) {
72		fprintf(stderr, "Can't read version info for hci%d: %s (%d)\n",
73						dev, strerror(errno), errno);
74		hci_close_dev(dd);
75		return -1;
76	}
77
78	if (ver.manufacturer != 10) {
79		fprintf(stderr, "Unsupported manufacturer\n");
80		hci_close_dev(dd);
81		return -1;
82	}
83
84	return 0;
85}
86
87static int do_command(uint16_t command, uint16_t seqnum, uint16_t varid, uint8_t *value, uint16_t length)
88{
89	unsigned char cp[254], rp[254];
90	struct hci_request rq;
91	uint8_t cmd[10];
92	uint16_t size;
93
94	size = (length < 8) ? 9 : ((length + 1) / 2) + 5;
95
96	cmd[0] = command & 0xff;
97	cmd[1] = command >> 8;
98	cmd[2] = size & 0xff;
99	cmd[3] = size >> 8;
100	cmd[4] = seqnum & 0xff;
101	cmd[5] = seqnum >> 8;
102	cmd[6] = varid & 0xff;
103	cmd[7] = varid >> 8;
104	cmd[8] = 0x00;
105	cmd[9] = 0x00;
106
107	memset(cp, 0, sizeof(cp));
108	cp[0] = 0xc2;
109	memcpy(cp + 1, cmd, sizeof(cmd));
110	memcpy(cp + 11, value, length);
111
112	switch (varid) {
113	case CSR_VARID_COLD_RESET:
114	case CSR_VARID_WARM_RESET:
115	case CSR_VARID_COLD_HALT:
116	case CSR_VARID_WARM_HALT:
117		return hci_send_cmd(dd, OGF_VENDOR_CMD, 0x00, (size * 2) + 1, cp);
118	}
119
120	memset(&rq, 0, sizeof(rq));
121	rq.ogf    = OGF_VENDOR_CMD;
122	rq.ocf    = 0x00;
123	rq.event  = EVT_VENDOR;
124	rq.cparam = cp;
125	rq.clen   = (size * 2) + 1;
126	rq.rparam = rp;
127	rq.rlen   = sizeof(rp);
128
129	if (hci_send_req(dd, &rq, 2000) < 0)
130		return -1;
131
132	if (rp[0] != 0xc2) {
133		errno = EIO;
134		return -1;
135	}
136
137	if ((rp[9] + (rp[10] << 8)) != 0) {
138		errno = ENXIO;
139		return -1;
140	}
141
142	memcpy(value, rp + 11, length);
143
144	return 0;
145}
146
147int csr_read_hci(uint16_t varid, uint8_t *value, uint16_t length)
148{
149	return do_command(0x0000, seqnum++, varid, value, length);
150}
151
152int csr_write_hci(uint16_t varid, uint8_t *value, uint16_t length)
153{
154	return do_command(0x0002, seqnum++, varid, value, length);
155}
156
157void csr_close_hci(void)
158{
159	hci_close_dev(dd);
160}
161