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
39 static uint16_t seqnum = 0x0000;
40
41 static int dd = -1;
42
csr_open_hci(char * device)43 int 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
do_command(uint16_t command,uint16_t seqnum,uint16_t varid,uint8_t * value,uint16_t length)87 static 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
csr_read_hci(uint16_t varid,uint8_t * value,uint16_t length)147 int csr_read_hci(uint16_t varid, uint8_t *value, uint16_t length)
148 {
149 return do_command(0x0000, seqnum++, varid, value, length);
150 }
151
csr_write_hci(uint16_t varid,uint8_t * value,uint16_t length)152 int csr_write_hci(uint16_t varid, uint8_t *value, uint16_t length)
153 {
154 return do_command(0x0002, seqnum++, varid, value, length);
155 }
156
csr_close_hci(void)157 void csr_close_hci(void)
158 {
159 hci_close_dev(dd);
160 }
161