1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1999-2000 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _SYS_BBC_BEEP_H 28 #define _SYS_BBC_BEEP_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * bbc_beep.h : BBC beep driver's header file. 38 */ 39 40 /* Keyboard Beep Control Register values */ 41 #define BBC_BEEP_ON 0x01 42 #define BBC_BEEP_OFF 0x00 43 44 /* 45 * Keyboard Beep Counter Register value : 46 * The most significant of [18..10] selects the bit of 47 * the BBC free running counter (updated on half the system 48 * clock) that is used to generate the audio signal. So, bit[10] 49 * generates a signal at 1/(2^12) the system frequency, and 50 * bit[18], at 1/(2^20). So if s = system frequency(in MHz), 51 * it can generate frequencies in the range (s >> 10) Hz to 52 * (s >> 2) Hz. 53 */ 54 #define BBC_BEEP_MIN_SHIFT 20 55 #define BBC_BEEP_MAX_SHIFT 12 56 #define BBC_BEEP_MSBIT 18 57 58 typedef volatile struct bbc_beep_regs { 59 60 /* Beep ON/OFF register */ 61 uint8_t bbc_beep_control; 62 63 /* Reserved */ 64 uint8_t reserved; 65 66 /* Register to set the frequency */ 67 uint8_t bbc_beep_counter[4]; 68 69 } bbc_beep_regs_t; 70 71 /* 72 * Beep driver state structure 73 */ 74 typedef struct bbc_beep_state { 75 76 /* Dip of bbc_beep device */ 77 dev_info_t *bbc_beep_dip; 78 79 /* Beep registers */ 80 bbc_beep_regs_t *bbc_beep_regsp; 81 82 /* Register handle */ 83 ddi_acc_handle_t bbc_beep_regs_handle; 84 85 /* If beeper is active or not */ 86 int bbc_beep_mode; 87 88 } bbc_beep_state_t; 89 90 #define BEEP_WRITE_CTRL_REG(val) ddi_put8(bbc_beeptr->bbc_beep_regs_handle, \ 91 ((uint8_t *)&bbc_beeptr->bbc_beep_regsp->bbc_beep_control), \ 92 ((int8_t)(val))) 93 #define BEEP_WRITE_COUNTER_REG(no, val) \ 94 ddi_put8(bbc_beeptr->bbc_beep_regs_handle, \ 95 ((uint8_t *)&bbc_beeptr->bbc_beep_regsp->bbc_beep_counter[no]), \ 96 ((int8_t)(val))) 97 98 #define BEEP_UNIT(dev) (getminor((dev))) 99 100 #ifdef __cplusplus 101 } 102 #endif 103 104 #endif /* _SYS_BBC_BEEP_H */ 105