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init_bcm2035.c revision 1.3 
      1 /*	$NetBSD: init_bcm2035.c,v 1.3 2015/06/16 23:04:14 christos 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_bcm2035.c,v 1.3 2015/06/16 23:04:14 christos Exp $");
     35 
     36 #include <bluetooth.h>
     37 #include <err.h>
     38 #include <errno.h>
     39 #include <stdlib.h>
     40 #include <termios.h>
     41 
     42 #include "btattach.h"
     43 
     44 #define HCI_CMD_BCM2035_SET_UART_BAUD_RATE	\
     45 	HCI_OPCODE(HCI_OGF_VENDOR, 0x018)
     46 
     47 #define HCI_CMD_BCM2035_SET_BDADDR		\
     48 	HCI_OPCODE(HCI_OGF_VENDOR, 0x001)
     49 
     50 void
     51 init_bcm2035(int fd, unsigned int speed)
     52 {
     53 	uint16_t rate;
     54 
     55 	uart_send_cmd(fd, HCI_CMD_RESET, NULL, 0);
     56 
     57 	uart_recv_cc(fd, HCI_CMD_RESET, NULL, 0);
     58 	/* assume it succeeded? */
     59 
     60 	/* can also set the bdaddr */
     61 
     62 	switch(speed) {
     63 	case B57600:	rate = 0xe600;	break;
     64 	case B115200:	rate = 0xf300;	break;
     65 	case B230400:	rate = 0xfa22;	break;
     66 	case B460800:	rate = 0xfd22;	break;
     67 	case B921600:	rate = 0xff55;	break;
     68 	default:
     69 		errx(EXIT_FAILURE, "invalid speed for bcm2035: %u", speed);
     70 	};
     71 
     72 	rate = htole16(rate);
     73 	uart_send_cmd(fd, HCI_CMD_BCM2035_SET_UART_BAUD_RATE, &rate, sizeof(rate));
     74 	uart_recv_cc(fd, HCI_CMD_BCM2035_SET_UART_BAUD_RATE, NULL, 0);
     75 	/* assume it succeeded? */
     76 }
     77