imx6_ocotp.c revision 1.1.2.2
1 1.1.2.2 thorpej /* $NetBSD: imx6_ocotp.c,v 1.1.2.2 2021/01/03 16:34:52 thorpej Exp $ */ 2 1.1.2.2 thorpej 3 1.1.2.2 thorpej /* 4 1.1.2.2 thorpej * Copyright (c) 2014 Ryo Shimizu <ryo (at) nerv.org> 5 1.1.2.2 thorpej * All rights reserved. 6 1.1.2.2 thorpej * 7 1.1.2.2 thorpej * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 thorpej * modification, are permitted provided that the following conditions 9 1.1.2.2 thorpej * are met: 10 1.1.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 thorpej * documentation and/or other materials provided with the distribution. 15 1.1.2.2 thorpej * 16 1.1.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 thorpej * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 1.1.2.2 thorpej * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 1.1.2.2 thorpej * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 1.1.2.2 thorpej * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 1.1.2.2 thorpej * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 1.1.2.2 thorpej * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 1.1.2.2 thorpej * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 1.1.2.2 thorpej * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.1.2.2 thorpej * POSSIBILITY OF SUCH DAMAGE. 27 1.1.2.2 thorpej */ 28 1.1.2.2 thorpej 29 1.1.2.2 thorpej /* 30 1.1.2.2 thorpej * i.MX6 On-Chip OTP Controller 31 1.1.2.2 thorpej */ 32 1.1.2.2 thorpej 33 1.1.2.2 thorpej #include <sys/cdefs.h> 34 1.1.2.2 thorpej __KERNEL_RCSID(0, "$NetBSD: imx6_ocotp.c,v 1.1.2.2 2021/01/03 16:34:52 thorpej Exp $"); 35 1.1.2.2 thorpej 36 1.1.2.2 thorpej #include <sys/bus.h> 37 1.1.2.2 thorpej #include <sys/device.h> 38 1.1.2.2 thorpej #include <sys/param.h> 39 1.1.2.2 thorpej 40 1.1.2.2 thorpej #include <dev/fdt/fdtvar.h> 41 1.1.2.2 thorpej 42 1.1.2.2 thorpej #include <arm/nxp/imx6_ocotpreg.h> 43 1.1.2.2 thorpej #include <arm/nxp/imx6_ocotpvar.h> 44 1.1.2.2 thorpej 45 1.1.2.2 thorpej struct imxocotp_softc { 46 1.1.2.2 thorpej device_t sc_dev; 47 1.1.2.2 thorpej 48 1.1.2.2 thorpej bus_addr_t sc_addr; 49 1.1.2.2 thorpej bus_space_tag_t sc_iot; 50 1.1.2.2 thorpej bus_space_handle_t sc_ioh; 51 1.1.2.2 thorpej bus_size_t sc_ios; 52 1.1.2.2 thorpej 53 1.1.2.2 thorpej struct clk *sc_clk; 54 1.1.2.2 thorpej 55 1.1.2.2 thorpej }; 56 1.1.2.2 thorpej 57 1.1.2.2 thorpej static struct imxocotp_softc *ocotp_softc; 58 1.1.2.2 thorpej 59 1.1.2.2 thorpej static int imxocotp_match(device_t, struct cfdata *, void *); 60 1.1.2.2 thorpej static void imxocotp_attach(device_t, device_t, void *); 61 1.1.2.2 thorpej 62 1.1.2.2 thorpej CFATTACH_DECL_NEW(imxocotp, sizeof(struct imxocotp_softc), 63 1.1.2.2 thorpej imxocotp_match, imxocotp_attach, NULL, NULL); 64 1.1.2.2 thorpej 65 1.1.2.2 thorpej int 66 1.1.2.2 thorpej imxocotp_match(device_t parent, cfdata_t cf, void *aux) 67 1.1.2.2 thorpej { 68 1.1.2.2 thorpej const char * const compatible[] = { 69 1.1.2.2 thorpej "fsl,imx6q-ocotp", 70 1.1.2.2 thorpej "fsl,imx6sl-ocotp", 71 1.1.2.2 thorpej "fsl,imx6sll-ocotp", 72 1.1.2.2 thorpej "fsl,imx6sx-ocotp", 73 1.1.2.2 thorpej "fsl,imx6ul-ocotp", 74 1.1.2.2 thorpej "fsl,imx6ull-ocotp", 75 1.1.2.2 thorpej NULL 76 1.1.2.2 thorpej }; 77 1.1.2.2 thorpej struct fdt_attach_args * const faa = aux; 78 1.1.2.2 thorpej 79 1.1.2.2 thorpej if (ocotp_softc != NULL) 80 1.1.2.2 thorpej return 0; 81 1.1.2.2 thorpej 82 1.1.2.2 thorpej return of_match_compatible(faa->faa_phandle, compatible); 83 1.1.2.2 thorpej } 84 1.1.2.2 thorpej 85 1.1.2.2 thorpej /* ARGSUSED */ 86 1.1.2.2 thorpej static void 87 1.1.2.2 thorpej imxocotp_attach(device_t parent, device_t self, void *aux) 88 1.1.2.2 thorpej { 89 1.1.2.2 thorpej struct imxocotp_softc *sc = device_private(self); 90 1.1.2.2 thorpej struct fdt_attach_args * const faa = aux; 91 1.1.2.2 thorpej const int phandle = faa->faa_phandle; 92 1.1.2.2 thorpej bus_addr_t addr; 93 1.1.2.2 thorpej bus_size_t size; 94 1.1.2.2 thorpej int error; 95 1.1.2.2 thorpej 96 1.1.2.2 thorpej sc->sc_iot = faa->faa_bst; 97 1.1.2.2 thorpej if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 98 1.1.2.2 thorpej aprint_error(": couldn't get registers\n"); 99 1.1.2.2 thorpej return; 100 1.1.2.2 thorpej } 101 1.1.2.2 thorpej 102 1.1.2.2 thorpej sc->sc_clk = fdtbus_clock_get_index(phandle, 0); 103 1.1.2.2 thorpej if (sc->sc_clk == NULL) { 104 1.1.2.2 thorpej aprint_error(": couldn't get clock\n"); 105 1.1.2.2 thorpej return; 106 1.1.2.2 thorpej } 107 1.1.2.2 thorpej 108 1.1.2.2 thorpej error = clk_enable(sc->sc_clk); 109 1.1.2.2 thorpej if (error) { 110 1.1.2.2 thorpej aprint_error_dev(sc->sc_dev, "couldn't enable: %d\n", error); 111 1.1.2.2 thorpej return; 112 1.1.2.2 thorpej } 113 1.1.2.2 thorpej 114 1.1.2.2 thorpej aprint_naive("\n"); 115 1.1.2.2 thorpej aprint_normal(": On-Chip OTP Controller\n"); 116 1.1.2.2 thorpej if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh)) { 117 1.1.2.2 thorpej aprint_error_dev(self, "Cannot map registers\n"); 118 1.1.2.2 thorpej return; 119 1.1.2.2 thorpej } 120 1.1.2.2 thorpej ocotp_softc = sc; 121 1.1.2.2 thorpej sc->sc_ios = size; 122 1.1.2.2 thorpej 123 1.1.2.2 thorpej uint32_t v = imxocotp_read(OCOTP_VERSION); 124 1.1.2.2 thorpej aprint_normal_dev(self, "OCOTP_VERSION %d.%d.%d\n", (v >> 24) & 0xff, (v >> 16) & 0xff, v & 0xffff); 125 1.1.2.2 thorpej 126 1.1.2.2 thorpej return; 127 1.1.2.2 thorpej } 128 1.1.2.2 thorpej 129 1.1.2.2 thorpej uint32_t 130 1.1.2.2 thorpej imxocotp_read(uint32_t addr) 131 1.1.2.2 thorpej { 132 1.1.2.2 thorpej struct imxocotp_softc *sc = ocotp_softc; 133 1.1.2.2 thorpej 134 1.1.2.2 thorpej if (sc == NULL) 135 1.1.2.2 thorpej return 0; 136 1.1.2.2 thorpej 137 1.1.2.2 thorpej if (addr > sc->sc_ios) 138 1.1.2.2 thorpej return 0; 139 1.1.2.2 thorpej 140 1.1.2.2 thorpej return bus_space_read_4(sc->sc_iot, sc->sc_ioh, addr); 141 1.1.2.2 thorpej } 142
Indexes created Thu Oct 02 14:10:14 GMT 2025