1 /* $NetBSD: init_swave.c,v 1.3 2010/03/09 02:01:51 kiyohara Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 Iain Hibbert 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * init information in this file gleaned from hciattach(8) 30 * command from BlueZ for Linux - see http://www.bluez.org/ 31 */ 32 33 #include <sys/cdefs.h> 34 __RCSID("$NetBSD: init_swave.c,v 1.3 2010/03/09 02:01:51 kiyohara Exp $"); 35 36 #include <bluetooth.h> 37 #include <err.h> 38 #include <errno.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <termios.h> 42 43 #include "btattach.h" 44 45 #define HCI_CMD_SWAVE_PARAM_ACCESS_SET \ 46 HCI_OPCODE(HCI_OGF_VENDOR, 0x00b) 47 48 typedef struct { 49 uint8_t sub_command; 50 uint8_t param_type; 51 uint8_t param_length; 52 uint8_t transport_flow; 53 uint8_t transport_type; 54 uint8_t transport_rate; 55 } __attribute__ ((__packed__)) hci_param_access_set_cp; 56 57 typedef struct { 58 uint8_t d0; /* ? */ 59 hci_param_access_set_cp cp; 60 } __attribute__ ((__packed__)) hci_param_access_set_rp; 61 62 void 63 init_swave(int fd, unsigned int speed) 64 { 65 hci_param_access_set_cp cp; 66 hci_param_access_set_rp rp; 67 size_t n; 68 69 cp.sub_command = 0x01; /* set */ 70 cp.param_type = 0x11; /* HCI Transport */ 71 cp.param_length = 0x03; 72 cp.transport_flow = 0x01; /* flow control */ 73 cp.transport_type = 0x01; /* UART */ 74 75 switch(speed) { 76 case B19200: cp.transport_rate = 0x03; break; 77 case B38400: cp.transport_rate = 0x02; break; 78 case B57600: cp.transport_rate = 0x01; break; 79 case B115200: cp.transport_rate = 0x00; break; 80 default: 81 errx(EXIT_FAILURE, "invalid speed for swave: %u\n", speed); 82 } 83 84 uart_send_cmd(fd, HCI_CMD_SWAVE_PARAM_ACCESS_SET, &cp, sizeof(cp)); 85 86 /* 87 * we wait for a HCI_EVENT_VENDOR response with "0x0b" in the 88 * first byte (possibly corresponding to the OGF?), and the 89 * response should contain our settings as confirmation. 90 */ 91 do { 92 n = uart_recv_ev(fd, HCI_EVENT_VENDOR, &rp, sizeof(rp)); 93 } while (n != sizeof(rp) || rp.d0 != 0x0b); 94 95 if (memcmp(&cp, &rp.cp, sizeof(cp))) 96 errx(EXIT_FAILURE, "param access set failed"); 97 98 /* 99 * now send a soft reset to make those parameters used 100 */ 101 uart_send_cmd(fd, HCI_CMD_RESET, NULL, 0); 102 /* assume it succeeded? */ 103 104 /* bluez also says there will be a confirmation packet 105 * on the new baud rate - ignore that for now 106 */ 107 } 108