pq3cfi.c revision 1.6
1 /* $NetBSD: pq3cfi.c,v 1.6 2020/07/06 09:34:16 rin Exp $ */ 2 /*- 3 * Copyright (c) 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Cliff Neighbors. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * NOR CFI driver support for booke 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: pq3cfi.c,v 1.6 2020/07/06 09:34:16 rin Exp $"); 37 38 #include "locators.h" 39 40 #ifdef _KERNEL_OPT 41 #include "opt_flash.h" 42 #endif 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/cdefs.h> 47 #include <sys/device.h> 48 #include <sys/endian.h> 49 50 #include <sys/bus.h> 51 52 #include <powerpc/booke/cpuvar.h> 53 54 #include <dev/nor/nor.h> 55 #include <dev/nor/cfi.h> 56 57 58 static int pq3cfi_match(device_t, cfdata_t, void *); 59 static void pq3cfi_attach(device_t, device_t, void *); 60 static int pq3cfi_detach(device_t, int); 61 62 struct pq3cfi_softc { 63 device_t sc_dev; 64 device_t sc_nordev; 65 struct cfi sc_cfi; 66 bus_addr_t sc_addr; 67 bus_size_t sc_size; 68 struct nor_interface sc_nor_if; 69 }; 70 71 CFATTACH_DECL_NEW(pq3cfi, sizeof(struct pq3cfi_softc), pq3cfi_match, 72 pq3cfi_attach, pq3cfi_detach, NULL); 73 74 static int 75 pq3cfi_match(device_t parent, cfdata_t match, void *aux) 76 { 77 struct generic_attach_args *ga = aux; 78 bus_size_t tmpsize = CFI_QRY_MIN_MAP_SIZE; 79 bus_addr_t addr; 80 struct cfi cfi; 81 int rv; 82 83 KASSERT(ga->ga_bst != NULL); 84 85 addr = ga->ga_addr; 86 if (addr == OBIOCF_ADDR_DEFAULT) { 87 aprint_error("%s: no base address\n", __func__); 88 return 0; 89 } 90 91 cfi.cfi_bst = ga->ga_bst; 92 int error = bus_space_map(cfi.cfi_bst, addr, tmpsize, 0, &cfi.cfi_bsh); 93 if (error != 0) { 94 aprint_error("%s: cannot map %d at offset %#x, error %d\n", __func__, tmpsize, addr, error); 95 return false; 96 } 97 98 if (! cfi_probe(&cfi)) { 99 aprint_debug("%s: probe addr %#x, CFI not found\n", 100 __func__, addr); 101 rv = 0; 102 } else { 103 rv = 1; 104 } 105 106 bus_space_unmap(cfi.cfi_bst, cfi.cfi_bsh, tmpsize); 107 108 return rv; 109 } 110 111 static void 112 pq3cfi_attach(device_t parent, device_t self, void *aux) 113 { 114 struct pq3cfi_softc *sc = device_private(self); 115 struct generic_attach_args *ga = aux; 116 struct cfi_query_data * const qryp = &sc->sc_cfi.cfi_qry_data; 117 const bus_size_t tmpsize = CFI_QRY_MIN_MAP_SIZE; 118 bool found; 119 int error; 120 121 aprint_normal("\n"); 122 123 sc->sc_dev = self; 124 sc->sc_cfi.cfi_bst = ga->ga_bst; 125 sc->sc_addr = ga->ga_addr; 126 127 /* map enough to identify, remap later when size is known */ 128 error = bus_space_map(sc->sc_cfi.cfi_bst, sc->sc_addr, tmpsize, 129 0, &sc->sc_cfi.cfi_bsh); 130 if (error != 0) { 131 aprint_error_dev(self, "could not map error %d\n", error); 132 return; 133 } 134 135 found = cfi_identify(&sc->sc_cfi); 136 137 bus_space_unmap(sc->sc_cfi.cfi_bst, sc->sc_cfi.cfi_bsh, tmpsize); 138 139 if (! found) { 140 /* should not happen, we already probed OK in match */ 141 aprint_error_dev(self, "could not map error %d\n", error); 142 return; 143 } 144 145 sc->sc_size = 1 << qryp->device_size; 146 147 sc->sc_nor_if = nor_interface_cfi; 148 sc->sc_nor_if.private = &sc->sc_cfi; 149 sc->sc_nor_if.access_width = (1 << sc->sc_cfi.cfi_portwidth); 150 151 cfi_print(self, &sc->sc_cfi); 152 153 error = bus_space_map(sc->sc_cfi.cfi_bst, sc->sc_addr, sc->sc_size, 154 BUS_SPACE_MAP_PREFETCHABLE, &sc->sc_cfi.cfi_bsh); 155 if (error != 0) { 156 aprint_error_dev(self, "could not map error %d\n", error); 157 return; 158 } 159 160 if (! pmf_device_register1(self, NULL, NULL, NULL)) 161 aprint_error_dev(self, "couldn't establish power handler\n"); 162 163 sc->sc_nordev = nor_attach_mi(&sc->sc_nor_if, self); 164 165 } 166 167 static int 168 pq3cfi_detach(device_t self, int flags) 169 { 170 struct pq3cfi_softc *sc = device_private(self); 171 int rv = 0; 172 173 pmf_device_deregister(self); 174 175 if (sc->sc_nordev != NULL) 176 rv = config_detach(sc->sc_nordev, flags); 177 178 bus_space_unmap(sc->sc_cfi.cfi_bst, sc->sc_cfi.cfi_bsh, sc->sc_size); 179 180 return rv; 181 } 182
Indexes created Fri Oct 03 02:09:57 GMT 2025