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      1 /*	$NetBSD: init_csr.c,v 1.2 2009/12/06 12:29:48 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_csr.c,v 1.2 2009/12/06 12:29:48 kiyohara Exp $");
     35 
     36 #include <bluetooth.h>
     37 #include <errno.h>
     38 #include <stdlib.h>
     39 #include <string.h>
     40 #include <termios.h>
     41 
     42 #include <dev/bluetooth/bcsp.h>
     43 
     44 #include "btattach.h"
     45 
     46 struct bccmd {
     47 	uint8_t	chanid;
     48 
     49 	struct {
     50 		uint16_t type;
     51 		uint16_t length;
     52 		uint16_t seqno;
     53 		uint16_t varid;
     54 		uint16_t status;
     55 		uint16_t payload[4];
     56 	} message;
     57 } __attribute__ ((__packed__));
     58 
     59 #define CSR_BCCMD_FIRST		(1<<6)
     60 #define CSR_BCCMD_LAST		(1<<7)
     61 
     62 #define CSR_BCCMD_MESSAGE_TYPE_GETREQ	0x0000
     63 #define CSR_BCCMD_MESSAGE_TYPE_GETRESP	0x0001
     64 #define CSR_BCCMD_MESSAGE_TYPE_SETREQ	0x0002
     65 
     66 #define CSR_BCCMD_MESSAGE_VARID_CONFIG_UART		0x6802
     67 #define CSR_BCCMD_MESSAGE_VARID_CONFIG_UART_STOPB	0x2000
     68 #define CSR_BCCMD_MESSAGE_VARID_CONFIG_UART_PARENB	0x4000
     69 #define CSR_BCCMD_MESSAGE_VARID_CONFIG_UART_PARODD	0x8000
     70 
     71 #define CSR_BCCMD_MESSAGE_STATUS_OK			0x0000
     72 #define CSR_BCCMD_MESSAGE_STATUS_NO_SUCH_VARID		0x0001
     73 #define CSR_BCCMD_MESSAGE_STATUS_TOO_BIG		0x0002
     74 #define CSR_BCCMD_MESSAGE_STATUS_NO_VALUE		0x0003
     75 #define CSR_BCCMD_MESSAGE_STATUS_BAD_REQ		0x0004
     76 #define CSR_BCCMD_MESSAGE_STATUS_NO_ACCESS		0x0005
     77 #define CSR_BCCMD_MESSAGE_STATUS_READ_ONLY		0x0006
     78 #define CSR_BCCMD_MESSAGE_STATUS_WRITE_ONLY		0x0007
     79 #define CSR_BCCMD_MESSAGE_STATUS_ERROR			0x0008
     80 #define CSR_BCCMD_MESSAGE_STATUS_PERMISION_DENIED	0x0009
     81 
     82 void
     83 init_csr(int fd, unsigned int speed)
     84 {
     85 	struct bccmd cmd;
     86 
     87 	/* setup BlueCore command packet */
     88 	memset(&cmd, 0, sizeof(cmd));
     89 
     90 	cmd.chanid = CSR_BCCMD_LAST | CSR_BCCMD_FIRST | BCSP_CHANNEL_BCCMD;
     91 
     92 	cmd.message.type = htole16(CSR_BCCMD_MESSAGE_TYPE_SETREQ);
     93 	cmd.message.length = htole16(sizeof(cmd.message) >> 1);
     94 	cmd.message.seqno = htole16(0);
     95 	cmd.message.varid = htole16(CSR_BCCMD_MESSAGE_VARID_CONFIG_UART);
     96 	cmd.message.status = htole16(CSR_BCCMD_MESSAGE_STATUS_OK);
     97 
     98 	/* Value = (baud rate / 244.140625) | no parity | 1 stop bit. */
     99 	cmd.message.payload[0] = htole16((speed * 64 + 7812) / 15625);
    100 
    101 	uart_send_cmd(fd, HCI_CMD_CSR_EXTN, &cmd, sizeof(cmd));
    102 	uart_recv_cc(fd, HCI_CMD_CSR_EXTN, NULL, 0);
    103 	/* assume it succeeded? */
    104 }
    105