1/* $Id: exb.c,v 1.5 2021/08/07 16:19:03 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software developed for The NetBSD Foundation 8 * by Masao Uebayashi. 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: exb.c,v 1.5 2021/08/07 16:19:03 thorpej Exp $"); 34 35#include "locators.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/device.h> 40#include <sys/extent.h> 41#include <sys/bus.h> 42 43#include <powerpc/ibm4xx/dcr4xx.h> 44#include <powerpc/ibm4xx/dev/exbvar.h> 45 46struct exb_softc { 47}; 48 49extern const struct exb_conf exb_confs[]; 50 51static int exb_match(device_t, cfdata_t, void *); 52static void exb_attach(device_t, device_t, void *); 53static int exb_print(void *, const char *); 54 55CFATTACH_DECL_NEW(exb, sizeof(struct exb_softc), exb_match, exb_attach, 56 NULL, NULL); 57 58static struct powerpc_bus_space exb_bus_space_tag = 59 { _BUS_SPACE_BIG_ENDIAN | _BUS_SPACE_MEM_TYPE, 0 }; 60 61static int 62exb_match(device_t parent, cfdata_t cf, void *aux) 63{ 64 65 return 1; 66} 67 68static void 69exb_attach(device_t parent, device_t self, void *aux) 70{ 71 const struct exb_conf *ec = exb_confs; 72 uint32_t ebc0_bNcr; 73 bus_addr_t base, size; 74 int locs[EXBCF_NLOCS]; 75 76 printf("\n"); 77 78 /* mtdcr needs a constant */ 79 switch (device_unit(self)) { 80 case 0: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B0CR); break; 81 case 1: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B1CR); break; 82 case 2: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B2CR); break; 83 case 3: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B3CR); break; 84 case 4: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B4CR); break; 85 case 5: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B5CR); break; 86 case 6: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B6CR); break; 87 case 7: mtdcr(DCR_EBC0_CFGADDR, DCR_EBC0_B7CR); break; 88 } 89 ebc0_bNcr = mfdcr(DCR_EBC0_CFGDATA); 90 base = ebc0_bNcr & 0xfff00000; 91 size = 0x00100000 << ((ebc0_bNcr & 0x000e0000) >> 17); 92 93 exb_bus_space_tag.pbs_base = base; 94 exb_bus_space_tag.pbs_limit = base + size - 1; 95 96 while (ec->ec_name) { 97 struct exb_conf ec1; 98 99 locs[EXBCF_ADDR] = ec->ec_addr; 100 101 ec1 = *ec; 102 ec1.ec_bust = exb_get_bus_space_tag(); 103 104 config_found(self, &ec1, exb_print, 105 CFARGS(.submatch = config_stdsubmatch, 106 .locators = locs)); 107 ec++; 108 } 109} 110 111static int 112exb_print(void *aux, const char *bus) 113{ 114 struct exb_conf *ec = aux; 115 116 if (bus) 117 return QUIET; 118 119 if (ec->ec_addr) 120 printf(" addr %"PRIxBUSADDR, ec->ec_addr); 121 122 return UNCONF; 123} 124 125bus_space_tag_t 126exb_get_bus_space_tag(void) 127{ 128 static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)] 129 __attribute__((aligned(8))); 130 static int exb_bus_space_tag_inited; 131 132 if (exb_bus_space_tag_inited == 0) { 133 if (bus_space_init(&exb_bus_space_tag, "exbtag", 134 ex_storage, sizeof(ex_storage))) 135 panic("exb_attach: Failed to initialise exb_bus_space_tag"); 136 exb_bus_space_tag_inited = 1; 137 } 138 return &exb_bus_space_tag; 139} 140