lm_i2c.c revision 1.1
1 /* $NetBSD: lm_i2c.c,v 1.1 2008/10/12 13:17:28 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bill Squier. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: lm_i2c.c,v 1.1 2008/10/12 13:17:28 pgoyette Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/conf.h> 40 41 #include <dev/i2c/i2cvar.h> 42 43 #include <dev/sysmon/sysmonvar.h> 44 45 #include <dev/ic/nslm7xvar.h> 46 47 int lm_i2c_match(device_t, cfdata_t, void *); 48 void lm_i2c_attach(device_t, device_t, void *); 49 int lm_i2c_detach(device_t, int); 50 51 uint8_t lm_i2c_readreg(struct lm_softc *, int); 52 void lm_i2c_writereg(struct lm_softc *, int, int); 53 54 struct lm_i2c_softc { 55 struct lm_softc sc_lmsc; 56 i2c_tag_t sc_tag; 57 i2c_addr_t sc_addr; 58 }; 59 60 CFATTACH_DECL_NEW(lm_iic, sizeof(struct lm_i2c_softc), 61 lm_i2c_match, lm_i2c_attach, lm_i2c_detach, NULL); 62 63 int 64 lm_i2c_match(device_t parent, cfdata_t match, void *aux) 65 { 66 struct i2c_attach_args *ia = aux; 67 int rv = 0; 68 struct lm_i2c_softc sc; 69 70 /* Must supply an address */ 71 if (ia->ia_addr < 1) 72 return 0; 73 74 /* Bus independent probe */ 75 sc.sc_lmsc.lm_writereg = lm_i2c_writereg; 76 sc.sc_lmsc.lm_readreg = lm_i2c_readreg; 77 sc.sc_tag = ia->ia_tag; 78 sc.sc_addr = ia->ia_addr; 79 rv = lm_probe(&sc.sc_lmsc); 80 81 return rv; 82 } 83 84 85 void 86 lm_i2c_attach(device_t parent, device_t self, void *aux) 87 { 88 struct lm_i2c_softc *sc = device_private(self); 89 struct i2c_attach_args *ia = aux; 90 91 sc->sc_tag = ia->ia_tag; 92 sc->sc_addr = ia->ia_addr; 93 94 /* Bus-independent attachment */ 95 sc->sc_lmsc.sc_dev = self; 96 sc->sc_lmsc.lm_writereg = lm_i2c_writereg; 97 sc->sc_lmsc.lm_readreg = lm_i2c_readreg; 98 99 lm_attach(&sc->sc_lmsc); 100 } 101 102 int 103 lm_i2c_detach(device_t self, int flags) 104 { 105 struct lm_i2c_softc *sc = device_private(self); 106 107 lm_detach(&sc->sc_lmsc); 108 return 0; 109 } 110 111 uint8_t 112 lm_i2c_readreg(struct lm_softc *lmsc, int reg) 113 { 114 struct lm_i2c_softc *sc = (struct lm_i2c_softc *)lmsc; 115 uint8_t cmd, data; 116 117 iic_acquire_bus(sc->sc_tag, 0); 118 119 cmd = reg; 120 iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 121 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0); 122 123 iic_release_bus(sc->sc_tag, 0); 124 125 return data; 126 } 127 128 129 void 130 lm_i2c_writereg(struct lm_softc *lmsc, int reg, int val) 131 { 132 struct lm_i2c_softc *sc = (struct lm_i2c_softc *)lmsc; 133 uint8_t cmd, data; 134 135 iic_acquire_bus(sc->sc_tag, 0); 136 137 cmd = reg; 138 data = val; 139 iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 140 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0); 141 142 iic_release_bus(sc->sc_tag, 0); 143 } 144 /* $NetBSD: lm_i2c.c,v 1.1 2008/10/12 13:17:28 pgoyette Exp $ */ 145 146 /*- 147 * Copyright (c) 2000 The NetBSD Foundation, Inc. 148 * All rights reserved. 149 * 150 * This code is derived from software contributed to The NetBSD Foundation 151 * by Bill Squier. 152 * 153 * Redistribution and use in source and binary forms, with or without 154 * modification, are permitted provided that the following conditions 155 * are met: 156 * 1. Redistributions of source code must retain the above copyright 157 * notice, this list of conditions and the following disclaimer. 158 * 2. Redistributions in binary form must reproduce the above copyright 159 * notice, this list of conditions and the following disclaimer in the 160 * documentation and/or other materials provided with the distribution. 161 * 162 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 163 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 164 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 165 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 166 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 167 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 168 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 169 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 170 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 171 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 172 * POSSIBILITY OF SUCH DAMAGE. 173 */ 174 175 #include <sys/cdefs.h> 176 __KERNEL_RCSID(0, "$NetBSD: lm_i2c.c,v 1.1 2008/10/12 13:17:28 pgoyette Exp $"); 177 178 #include <sys/param.h> 179 #include <sys/systm.h> 180 #include <sys/kernel.h> 181 #include <sys/device.h> 182 #include <sys/conf.h> 183 184 #include <dev/i2c/i2cvar.h> 185 186 #include <dev/sysmon/sysmonvar.h> 187 188 #include <dev/ic/nslm7xvar.h> 189 190 int lm_i2c_match(device_t, cfdata_t, void *); 191 void lm_i2c_attach(device_t, device_t, void *); 192 int lm_i2c_detach(device_t, int); 193 194 uint8_t lm_i2c_readreg(struct lm_softc *, int); 195 void lm_i2c_writereg(struct lm_softc *, int, int); 196 197 struct lm_i2c_softc { 198 struct lm_softc sc_lmsc; 199 i2c_tag_t sc_tag; 200 i2c_addr_t sc_addr; 201 }; 202 203 CFATTACH_DECL_NEW(lm_iic, sizeof(struct lm_i2c_softc), 204 lm_i2c_match, lm_i2c_attach, lm_i2c_detach, NULL); 205 206 int 207 lm_i2c_match(device_t parent, cfdata_t match, void *aux) 208 { 209 struct i2c_attach_args *ia = aux; 210 int rv = 0; 211 struct lm_i2c_softc sc; 212 213 /* Must supply an address */ 214 if (ia->ia_addr < 1) 215 return 0; 216 217 /* Bus independent probe */ 218 sc.sc_lmsc.lm_writereg = lm_i2c_writereg; 219 sc.sc_lmsc.lm_readreg = lm_i2c_readreg; 220 sc.sc_tag = ia->ia_tag; 221 sc.sc_addr = ia->ia_addr; 222 rv = lm_probe(&sc.sc_lmsc); 223 224 return rv; 225 } 226 227 228 void 229 lm_i2c_attach(device_t parent, device_t self, void *aux) 230 { 231 struct lm_i2c_softc *sc = device_private(self); 232 struct i2c_attach_args *ia = aux; 233 234 sc->sc_tag = ia->ia_tag; 235 sc->sc_addr = ia->ia_addr; 236 237 /* Bus-independent attachment */ 238 sc->sc_lmsc.sc_dev = self; 239 sc->sc_lmsc.lm_writereg = lm_i2c_writereg; 240 sc->sc_lmsc.lm_readreg = lm_i2c_readreg; 241 242 lm_attach(&sc->sc_lmsc); 243 } 244 245 int 246 lm_i2c_detach(device_t self, int flags) 247 { 248 struct lm_i2c_softc *sc = device_private(self); 249 250 lm_detach(&sc->sc_lmsc); 251 return 0; 252 } 253 254 uint8_t 255 lm_i2c_readreg(struct lm_softc *lmsc, int reg) 256 { 257 struct lm_i2c_softc *sc = (struct lm_i2c_softc *)lmsc; 258 uint8_t cmd, data; 259 260 iic_acquire_bus(sc->sc_tag, 0); 261 262 cmd = reg; 263 iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 264 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0); 265 266 iic_release_bus(sc->sc_tag, 0); 267 268 return data; 269 } 270 271 272 void 273 lm_i2c_writereg(struct lm_softc *lmsc, int reg, int val) 274 { 275 struct lm_i2c_softc *sc = (struct lm_i2c_softc *)lmsc; 276 uint8_t cmd, data; 277 278 iic_acquire_bus(sc->sc_tag, 0); 279 280 cmd = reg; 281 data = val; 282 iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 283 sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0); 284 285 iic_release_bus(sc->sc_tag, 0); 286 } 287
Indexes created Tue Sep 30 11:09:46 GMT 2025