ingenic_efuse.c revision 1.3.2.2
1 1.3.2.2 skrll /* $NetBSD: ingenic_efuse.c,v 1.3.2.2 2015/12/27 12:09:38 skrll Exp $ */ 2 1.3.2.2 skrll 3 1.3.2.2 skrll /*- 4 1.3.2.2 skrll * Copyright (c) 2015 Michael Lorenz 5 1.3.2.2 skrll * All rights reserved. 6 1.3.2.2 skrll * 7 1.3.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 skrll * modification, are permitted provided that the following conditions 9 1.3.2.2 skrll * are met: 10 1.3.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.3.2.2 skrll * 16 1.3.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.3.2.2 skrll * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.3.2.2 skrll * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.3.2.2 skrll * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.3.2.2 skrll * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.3.2.2 skrll * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.3.2.2 skrll * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.3.2.2 skrll * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.3.2.2 skrll * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.3.2.2 skrll * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.3.2.2 skrll * POSSIBILITY OF SUCH DAMAGE. 27 1.3.2.2 skrll */ 28 1.3.2.2 skrll 29 1.3.2.2 skrll /* 30 1.3.2.2 skrll * a driver for the 'EFUSE Slave Interface' found on JZ4780 31 1.3.2.2 skrll * more or less 8kBit of non-volatile storage containing things like MAC 32 1.3.2.2 skrll * address, various encryption keys, boot code, serial numbers and parameters. 33 1.3.2.2 skrll * Using it only to get the MAC address for now. 34 1.3.2.2 skrll */ 35 1.3.2.2 skrll 36 1.3.2.2 skrll #include <sys/cdefs.h> 37 1.3.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: ingenic_efuse.c,v 1.3.2.2 2015/12/27 12:09:38 skrll Exp $"); 38 1.3.2.2 skrll 39 1.3.2.2 skrll #include <sys/param.h> 40 1.3.2.2 skrll #include <sys/systm.h> 41 1.3.2.2 skrll #include <sys/device.h> 42 1.3.2.2 skrll #include <sys/mutex.h> 43 1.3.2.2 skrll #include <sys/bus.h> 44 1.3.2.2 skrll 45 1.3.2.2 skrll #include <mips/ingenic/ingenic_var.h> 46 1.3.2.2 skrll #include <mips/ingenic/ingenic_regs.h> 47 1.3.2.2 skrll 48 1.3.2.2 skrll #include "opt_ingenic.h" 49 1.3.2.2 skrll 50 1.3.2.2 skrll static int ingenic_efuse_match(device_t, struct cfdata *, void *); 51 1.3.2.2 skrll static void ingenic_efuse_attach(device_t, device_t, void *); 52 1.3.2.2 skrll 53 1.3.2.2 skrll struct efuse_softc { 54 1.3.2.2 skrll device_t sc_dev; 55 1.3.2.2 skrll bus_space_tag_t sc_iot; 56 1.3.2.2 skrll bus_space_handle_t sc_ioh; 57 1.3.2.2 skrll uint8_t sc_data[0x20]; 58 1.3.2.2 skrll }; 59 1.3.2.2 skrll 60 1.3.2.2 skrll static void ingenic_efuse_read(struct efuse_softc *, int, int, uint8_t *); 61 1.3.2.2 skrll 62 1.3.2.2 skrll void ingenic_set_enaddr(uint8_t *); 63 1.3.2.2 skrll 64 1.3.2.2 skrll CFATTACH_DECL_NEW(ingenic_efuse, sizeof(struct efuse_softc), 65 1.3.2.2 skrll ingenic_efuse_match, ingenic_efuse_attach, NULL, NULL); 66 1.3.2.2 skrll 67 1.3.2.2 skrll /* ARGSUSED */ 68 1.3.2.2 skrll static int 69 1.3.2.2 skrll ingenic_efuse_match(device_t parent, struct cfdata *match, void *aux) 70 1.3.2.2 skrll { 71 1.3.2.2 skrll struct apbus_attach_args *aa = aux; 72 1.3.2.2 skrll 73 1.3.2.2 skrll if (strcmp(aa->aa_name, "efuse") != 0) 74 1.3.2.2 skrll return 0; 75 1.3.2.2 skrll 76 1.3.2.2 skrll return 1; 77 1.3.2.2 skrll } 78 1.3.2.2 skrll 79 1.3.2.2 skrll /* ARGSUSED */ 80 1.3.2.2 skrll static void 81 1.3.2.2 skrll ingenic_efuse_attach(device_t parent, device_t self, void *aux) 82 1.3.2.2 skrll { 83 1.3.2.2 skrll struct efuse_softc *sc = device_private(self); 84 1.3.2.2 skrll struct apbus_attach_args *aa = aux; 85 1.3.2.2 skrll int error; 86 1.3.2.2 skrll 87 1.3.2.2 skrll sc->sc_dev = self; 88 1.3.2.2 skrll 89 1.3.2.2 skrll sc->sc_iot = aa->aa_bst; 90 1.3.2.2 skrll 91 1.3.2.2 skrll if (aa->aa_addr == 0) 92 1.3.2.2 skrll aa->aa_addr = JZ_EFUSE; 93 1.3.2.2 skrll 94 1.3.2.2 skrll error = bus_space_map(aa->aa_bst, aa->aa_addr, 0x30, 0, &sc->sc_ioh); 95 1.3.2.2 skrll if (error) { 96 1.3.2.2 skrll aprint_error_dev(self, 97 1.3.2.2 skrll "can't map registers for %s: %d\n", aa->aa_name, error); 98 1.3.2.2 skrll return; 99 1.3.2.2 skrll } 100 1.3.2.2 skrll 101 1.3.2.2 skrll aprint_naive(": Ingenic EFUSE Slave Interface\n"); 102 1.3.2.2 skrll aprint_normal(": Ingenic EFUSE Slave Interface\n"); 103 1.3.2.2 skrll ingenic_efuse_read(sc, 8, 0x20, sc->sc_data); 104 1.3.2.2 skrll ingenic_set_enaddr(&sc->sc_data[0x1a]); 105 1.3.2.2 skrll #ifdef INGENIC_DEBUG 106 1.3.2.2 skrll { 107 1.3.2.2 skrll int i, j; 108 1.3.2.2 skrll for (i = 0; i < 0x20; i += 8) { 109 1.3.2.2 skrll printf("%02x:", i); 110 1.3.2.2 skrll for (j = 0; j < 8; j++) 111 1.3.2.2 skrll printf(" %02x", sc->sc_data[i + j]); 112 1.3.2.2 skrll printf("\n"); 113 1.3.2.2 skrll } 114 1.3.2.2 skrll } 115 1.3.2.2 skrll #endif 116 1.3.2.2 skrll } 117 1.3.2.2 skrll 118 1.3.2.2 skrll static void 119 1.3.2.2 skrll ingenic_efuse_read(struct efuse_softc *sc, int addr, int len, uint8_t *buf) 120 1.3.2.2 skrll { 121 1.3.2.2 skrll uint32_t abuf; 122 1.3.2.2 skrll int i; 123 1.3.2.2 skrll 124 1.3.2.2 skrll /* default, just in case */ 125 1.3.2.2 skrll bus_space_write_4(sc->sc_iot, sc->sc_ioh, JZ_EFUCFG, 0x00040000); 126 1.3.2.2 skrll bus_space_write_4(sc->sc_iot, sc->sc_ioh, JZ_EFUCTRL, 127 1.3.2.2 skrll JZ_EFUSE_READ | 128 1.3.2.2 skrll (addr << JZ_EFUSE_ADDR_SHIFT) | 129 1.3.2.2 skrll ((len - 1) << JZ_EFUSE_SIZE_SHIFT)); 130 1.3.2.2 skrll do {} while ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, JZ_EFUSTATE) & 131 1.3.2.2 skrll JZ_EFUSE_RD_DONE) == 0); 132 1.3.2.2 skrll for (i = 0; i < len; i += 4) { 133 1.3.2.2 skrll abuf = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 134 1.3.2.2 skrll JZ_EFUDATA0 + i); 135 1.3.2.2 skrll memcpy(buf, &abuf, 4); 136 1.3.2.2 skrll buf += 4; 137 1.3.2.2 skrll } 138 1.3.2.2 skrll } 139
Indexes created Wed Oct 22 13:09:56 GMT 2025