lm_i2c.c revision 1.2.16.2
1 1.2.16.2 yamt /* $NetBSD: lm_i2c.c,v 1.2.16.2 2009/05/04 08:12:39 yamt Exp $ */ 2 1.2.16.2 yamt 3 1.2.16.2 yamt /*- 4 1.2.16.2 yamt * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 1.2.16.2 yamt * All rights reserved. 6 1.2.16.2 yamt * 7 1.2.16.2 yamt * This code is derived from software contributed to The NetBSD Foundation 8 1.2.16.2 yamt * by Bill Squier. 9 1.2.16.2 yamt * 10 1.2.16.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.2.16.2 yamt * modification, are permitted provided that the following conditions 12 1.2.16.2 yamt * are met: 13 1.2.16.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.2.16.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.2.16.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.16.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.2.16.2 yamt * documentation and/or other materials provided with the distribution. 18 1.2.16.2 yamt * 19 1.2.16.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.16.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.16.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.16.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.16.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.16.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.16.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.16.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.16.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.16.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.16.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.2.16.2 yamt */ 31 1.2.16.2 yamt 32 1.2.16.2 yamt #include <sys/cdefs.h> 33 1.2.16.2 yamt __KERNEL_RCSID(0, "$NetBSD: lm_i2c.c,v 1.2.16.2 2009/05/04 08:12:39 yamt Exp $"); 34 1.2.16.2 yamt 35 1.2.16.2 yamt #include <sys/param.h> 36 1.2.16.2 yamt #include <sys/systm.h> 37 1.2.16.2 yamt #include <sys/kernel.h> 38 1.2.16.2 yamt #include <sys/device.h> 39 1.2.16.2 yamt #include <sys/conf.h> 40 1.2.16.2 yamt 41 1.2.16.2 yamt #include <dev/i2c/i2cvar.h> 42 1.2.16.2 yamt 43 1.2.16.2 yamt #include <dev/sysmon/sysmonvar.h> 44 1.2.16.2 yamt 45 1.2.16.2 yamt #include <dev/ic/nslm7xvar.h> 46 1.2.16.2 yamt 47 1.2.16.2 yamt int lm_i2c_match(device_t, cfdata_t, void *); 48 1.2.16.2 yamt void lm_i2c_attach(device_t, device_t, void *); 49 1.2.16.2 yamt int lm_i2c_detach(device_t, int); 50 1.2.16.2 yamt 51 1.2.16.2 yamt uint8_t lm_i2c_readreg(struct lm_softc *, int); 52 1.2.16.2 yamt void lm_i2c_writereg(struct lm_softc *, int, int); 53 1.2.16.2 yamt 54 1.2.16.2 yamt struct lm_i2c_softc { 55 1.2.16.2 yamt struct lm_softc sc_lmsc; 56 1.2.16.2 yamt i2c_tag_t sc_tag; 57 1.2.16.2 yamt i2c_addr_t sc_addr; 58 1.2.16.2 yamt }; 59 1.2.16.2 yamt 60 1.2.16.2 yamt CFATTACH_DECL_NEW(lm_iic, sizeof(struct lm_i2c_softc), 61 1.2.16.2 yamt lm_i2c_match, lm_i2c_attach, lm_i2c_detach, NULL); 62 1.2.16.2 yamt 63 1.2.16.2 yamt int 64 1.2.16.2 yamt lm_i2c_match(device_t parent, cfdata_t match, void *aux) 65 1.2.16.2 yamt { 66 1.2.16.2 yamt struct i2c_attach_args *ia = aux; 67 1.2.16.2 yamt int rv = 0; 68 1.2.16.2 yamt struct lm_i2c_softc sc; 69 1.2.16.2 yamt 70 1.2.16.2 yamt /* Must supply an address */ 71 1.2.16.2 yamt if (ia->ia_addr < 1) 72 1.2.16.2 yamt return 0; 73 1.2.16.2 yamt 74 1.2.16.2 yamt /* Bus independent probe */ 75 1.2.16.2 yamt sc.sc_lmsc.lm_writereg = lm_i2c_writereg; 76 1.2.16.2 yamt sc.sc_lmsc.lm_readreg = lm_i2c_readreg; 77 1.2.16.2 yamt sc.sc_tag = ia->ia_tag; 78 1.2.16.2 yamt sc.sc_addr = ia->ia_addr; 79 1.2.16.2 yamt rv = lm_probe(&sc.sc_lmsc); 80 1.2.16.2 yamt 81 1.2.16.2 yamt return rv; 82 1.2.16.2 yamt } 83 1.2.16.2 yamt 84 1.2.16.2 yamt 85 1.2.16.2 yamt void 86 1.2.16.2 yamt lm_i2c_attach(device_t parent, device_t self, void *aux) 87 1.2.16.2 yamt { 88 1.2.16.2 yamt struct lm_i2c_softc *sc = device_private(self); 89 1.2.16.2 yamt struct i2c_attach_args *ia = aux; 90 1.2.16.2 yamt 91 1.2.16.2 yamt sc->sc_tag = ia->ia_tag; 92 1.2.16.2 yamt sc->sc_addr = ia->ia_addr; 93 1.2.16.2 yamt 94 1.2.16.2 yamt /* Bus-independent attachment */ 95 1.2.16.2 yamt sc->sc_lmsc.sc_dev = self; 96 1.2.16.2 yamt sc->sc_lmsc.lm_writereg = lm_i2c_writereg; 97 1.2.16.2 yamt sc->sc_lmsc.lm_readreg = lm_i2c_readreg; 98 1.2.16.2 yamt 99 1.2.16.2 yamt lm_attach(&sc->sc_lmsc); 100 1.2.16.2 yamt } 101 1.2.16.2 yamt 102 1.2.16.2 yamt int 103 1.2.16.2 yamt lm_i2c_detach(device_t self, int flags) 104 1.2.16.2 yamt { 105 1.2.16.2 yamt struct lm_i2c_softc *sc = device_private(self); 106 1.2.16.2 yamt 107 1.2.16.2 yamt lm_detach(&sc->sc_lmsc); 108 1.2.16.2 yamt return 0; 109 1.2.16.2 yamt } 110 1.2.16.2 yamt 111 1.2.16.2 yamt uint8_t 112 1.2.16.2 yamt lm_i2c_readreg(struct lm_softc *lmsc, int reg) 113 1.2.16.2 yamt { 114 1.2.16.2 yamt struct lm_i2c_softc *sc = (struct lm_i2c_softc *)lmsc; 115 1.2.16.2 yamt uint8_t cmd, data; 116 1.2.16.2 yamt 117 1.2.16.2 yamt iic_acquire_bus(sc->sc_tag, 0); 118 1.2.16.2 yamt 119 1.2.16.2 yamt cmd = reg; 120 1.2.16.2 yamt iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 121 1.2.16.2 yamt sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0); 122 1.2.16.2 yamt 123 1.2.16.2 yamt iic_release_bus(sc->sc_tag, 0); 124 1.2.16.2 yamt 125 1.2.16.2 yamt return data; 126 1.2.16.2 yamt } 127 1.2.16.2 yamt 128 1.2.16.2 yamt 129 1.2.16.2 yamt void 130 1.2.16.2 yamt lm_i2c_writereg(struct lm_softc *lmsc, int reg, int val) 131 1.2.16.2 yamt { 132 1.2.16.2 yamt struct lm_i2c_softc *sc = (struct lm_i2c_softc *)lmsc; 133 1.2.16.2 yamt uint8_t cmd, data; 134 1.2.16.2 yamt 135 1.2.16.2 yamt iic_acquire_bus(sc->sc_tag, 0); 136 1.2.16.2 yamt 137 1.2.16.2 yamt cmd = reg; 138 1.2.16.2 yamt data = val; 139 1.2.16.2 yamt iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 140 1.2.16.2 yamt sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0); 141 1.2.16.2 yamt 142 1.2.16.2 yamt iic_release_bus(sc->sc_tag, 0); 143 1.2.16.2 yamt } 144
Indexes created Tue Sep 30 11:09:46 GMT 2025