oweeprom.c revision 1.1.2.2
1 1.1.2.2 bouyer /* $NetBSD: oweeprom.c,v 1.1.2.2 2020/04/20 11:29:04 bouyer Exp $ */ 2 1.1.2.2 bouyer 3 1.1.2.2 bouyer /*- 4 1.1.2.2 bouyer * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 1.1.2.2 bouyer * All rights reserved. 6 1.1.2.2 bouyer * 7 1.1.2.2 bouyer * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 bouyer * by Michael Lorenz. 9 1.1.2.2 bouyer * 10 1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 bouyer * modification, are permitted provided that the following conditions 12 1.1.2.2 bouyer * are met: 13 1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 18 1.1.2.2 bouyer * 19 1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 bouyer * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 bouyer * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 bouyer * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 bouyer * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 bouyer * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 bouyer * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 bouyer * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 bouyer * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 bouyer * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 bouyer */ 31 1.1.2.2 bouyer 32 1.1.2.2 bouyer /* 33 1.1.2.2 bouyer * 1-Wire EEPROM family type device driver. 34 1.1.2.2 bouyer */ 35 1.1.2.2 bouyer 36 1.1.2.2 bouyer #include <sys/cdefs.h> 37 1.1.2.2 bouyer __KERNEL_RCSID(0, "$NetBSD: oweeprom.c,v 1.1.2.2 2020/04/20 11:29:04 bouyer Exp $"); 38 1.1.2.2 bouyer 39 1.1.2.2 bouyer #include <sys/param.h> 40 1.1.2.2 bouyer #include <sys/systm.h> 41 1.1.2.2 bouyer #include <sys/device.h> 42 1.1.2.2 bouyer #include <sys/kernel.h> 43 1.1.2.2 bouyer #include <sys/proc.h> 44 1.1.2.2 bouyer 45 1.1.2.2 bouyer #include <dev/onewire/onewiredevs.h> 46 1.1.2.2 bouyer #include <dev/onewire/onewirereg.h> 47 1.1.2.2 bouyer #include <dev/onewire/onewirevar.h> 48 1.1.2.2 bouyer 49 1.1.2.2 bouyer #define EEPROM_CMD_WRITE_SCRATCHPAD 0x0f 50 1.1.2.2 bouyer #define EEPROM_CMD_READ_SCRATCHPAD 0xaa 51 1.1.2.2 bouyer #define EEPROM_CMD_COPY_SCRATCHPAD 0x55 52 1.1.2.2 bouyer #define EEPROM_CMD_READ_MEMORY 0xf0 53 1.1.2.2 bouyer #define EEPROM_CMD_WRITE_APPREG 0x99 54 1.1.2.2 bouyer #define EEPROM_CMD_READ_STATUS 0x66 55 1.1.2.2 bouyer #define EEPROM_CMD_READ_APPREG 0xc3 56 1.1.2.2 bouyer #define EEPROM_CMD_COPY_LOCK_APPREG 0x5a 57 1.1.2.2 bouyer 58 1.1.2.2 bouyer struct oweeprom_softc { 59 1.1.2.2 bouyer device_t sc_dev; 60 1.1.2.2 bouyer void *sc_onewire; 61 1.1.2.2 bouyer u_int64_t sc_rom; 62 1.1.2.2 bouyer }; 63 1.1.2.2 bouyer 64 1.1.2.2 bouyer static int oweeprom_match(device_t, cfdata_t, void *); 65 1.1.2.2 bouyer static void oweeprom_attach(device_t, device_t, void *); 66 1.1.2.2 bouyer 67 1.1.2.2 bouyer CFATTACH_DECL_NEW(oweeprom, sizeof(struct oweeprom_softc), 68 1.1.2.2 bouyer oweeprom_match, oweeprom_attach, NULL, NULL); 69 1.1.2.2 bouyer 70 1.1.2.2 bouyer static const struct onewire_matchfam oweeprom_fams[] = { 71 1.1.2.2 bouyer { ONEWIRE_FAMILY_DS2430 }, 72 1.1.2.2 bouyer }; 73 1.1.2.2 bouyer 74 1.1.2.2 bouyer static int 75 1.1.2.2 bouyer oweeprom_match(device_t parent, cfdata_t match, void *aux) 76 1.1.2.2 bouyer { 77 1.1.2.2 bouyer return (onewire_matchbyfam(aux, oweeprom_fams, 78 1.1.2.2 bouyer __arraycount(oweeprom_fams))); 79 1.1.2.2 bouyer } 80 1.1.2.2 bouyer 81 1.1.2.2 bouyer static void 82 1.1.2.2 bouyer oweeprom_attach(device_t parent, device_t self, void *aux) 83 1.1.2.2 bouyer { 84 1.1.2.2 bouyer struct oweeprom_softc *sc = device_private(self); 85 1.1.2.2 bouyer struct onewire_attach_args *oa = aux; 86 1.1.2.2 bouyer int i, j; 87 1.1.2.2 bouyer uint8_t data[32]; 88 1.1.2.2 bouyer 89 1.1.2.2 bouyer aprint_naive("\n"); 90 1.1.2.2 bouyer 91 1.1.2.2 bouyer sc->sc_dev = self; 92 1.1.2.2 bouyer sc->sc_onewire = oa->oa_onewire; 93 1.1.2.2 bouyer sc->sc_rom = oa->oa_rom; 94 1.1.2.2 bouyer 95 1.1.2.2 bouyer aprint_normal("\n"); 96 1.1.2.2 bouyer 97 1.1.2.2 bouyer onewire_lock(sc->sc_onewire); 98 1.1.2.2 bouyer if (onewire_reset(sc->sc_onewire) != 0) { 99 1.1.2.2 bouyer printf("reset failrd\n"); 100 1.1.2.2 bouyer return; 101 1.1.2.2 bouyer } 102 1.1.2.2 bouyer 103 1.1.2.2 bouyer onewire_matchrom(sc->sc_onewire, sc->sc_rom); 104 1.1.2.2 bouyer onewire_write_byte(sc->sc_onewire, EEPROM_CMD_READ_MEMORY); 105 1.1.2.2 bouyer onewire_write_byte(sc->sc_onewire, 0); 106 1.1.2.2 bouyer onewire_read_block(sc->sc_onewire, data, 32); 107 1.1.2.2 bouyer printf("EEPROM\n"); 108 1.1.2.2 bouyer for (i = 0; i < 32; i += 8) { 109 1.1.2.2 bouyer printf("%02x:", i); 110 1.1.2.2 bouyer for (j = 0; j < 8; j++) 111 1.1.2.2 bouyer printf(" %02x", data[i + j]); 112 1.1.2.2 bouyer printf("\n"); 113 1.1.2.2 bouyer } 114 1.1.2.2 bouyer 115 1.1.2.2 bouyer if (onewire_reset(sc->sc_onewire) != 0) { 116 1.1.2.2 bouyer printf("reset failrd\n"); 117 1.1.2.2 bouyer return; 118 1.1.2.2 bouyer } 119 1.1.2.2 bouyer 120 1.1.2.2 bouyer onewire_matchrom(sc->sc_onewire, sc->sc_rom); 121 1.1.2.2 bouyer onewire_write_byte(sc->sc_onewire, EEPROM_CMD_READ_APPREG); 122 1.1.2.2 bouyer onewire_write_byte(sc->sc_onewire, 0); 123 1.1.2.2 bouyer onewire_read_block(sc->sc_onewire, data, 8); 124 1.1.2.2 bouyer printf("Application register\n"); 125 1.1.2.2 bouyer for (j = 0; j < 8; j++) 126 1.1.2.2 bouyer printf(" %02x", data[j]); 127 1.1.2.2 bouyer printf("\n"); 128 1.1.2.2 bouyer 129 1.1.2.2 bouyer if (onewire_reset(sc->sc_onewire) != 0) { 130 1.1.2.2 bouyer printf("reset failrd\n"); 131 1.1.2.2 bouyer return; 132 1.1.2.2 bouyer } 133 1.1.2.2 bouyer 134 1.1.2.2 bouyer onewire_matchrom(sc->sc_onewire, sc->sc_rom); 135 1.1.2.2 bouyer onewire_write_byte(sc->sc_onewire, EEPROM_CMD_READ_STATUS); 136 1.1.2.2 bouyer onewire_write_byte(sc->sc_onewire, 0); 137 1.1.2.2 bouyer onewire_read_block(sc->sc_onewire, data, 1); 138 1.1.2.2 bouyer printf("Status register %02x\n", data[0]); 139 1.1.2.2 bouyer 140 1.1.2.2 bouyer onewire_unlock(sc->sc_onewire); 141 1.1.2.2 bouyer } 142
Indexes created Wed Oct 29 12:09:47 GMT 2025