usr.sbin/btattach/init_csr.c

   1 /*      $NetBSD: init_csr.c,v 1.1 2008/04/15 11:17:48 plunky 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 1.1 2008/04/15 11:17:48 plunky 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 }