1/* $NetBSD: elb.c,v 1.11 2021/08/07 16:18:52 thorpej Exp $ */ 2 3/*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Juergen Hannken-Illjes. 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: elb.c,v 1.11 2021/08/07 16:18:52 thorpej Exp $"); 34 35#include <sys/param.h> 36#include <sys/conf.h> 37#include <sys/device.h> 38#include <sys/systm.h> 39#include <sys/extent.h> 40 41#include <machine/explora.h> 42#define _POWERPC_BUS_DMA_PRIVATE 43#include <sys/bus.h> 44 45#include <powerpc/ibm4xx/dcr403cgx.h> 46 47#include <evbppc/explora/dev/elbvar.h> 48 49struct elb_dev { 50 const char *elb_name; 51 int elb_addr; 52 int elb_addr2; 53 int elb_irq; 54 bus_space_tag_t elb_bt; 55}; 56 57static int elb_match(device_t, cfdata_t, void *); 58static void elb_attach(device_t, device_t, void *); 59static int elb_print(void *, const char *); 60 61static struct powerpc_bus_space elb_tag = { 62 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE | 1, /* stride 1 */ 63 0x00000000, 64 BASE_PCKBC, 65 BASE_PCKBC + 0x6ff 66}; 67static struct powerpc_bus_space elb_fb_tag = { 68 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE, 69 0x00000000, 70 BASE_FB, 71 BASE_FB2 + SIZE_FB - 1 72}; 73 74static char elb_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)] 75 __attribute__((aligned(8))); 76static char elbfb_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)] 77 __attribute__((aligned(8))); 78 79static bool elb_tag_init_done; 80static bool elbfb_tag_init_done; 81 82/* 83 * DMA struct, nothing special. 84 */ 85static struct powerpc_bus_dma_tag elb_bus_dma_tag = { 86 0, /* _bounce_thresh */ 87 _bus_dmamap_create, 88 _bus_dmamap_destroy, 89 _bus_dmamap_load, 90 _bus_dmamap_load_mbuf, 91 _bus_dmamap_load_uio, 92 _bus_dmamap_load_raw, 93 _bus_dmamap_unload, 94 _bus_dmamap_sync, 95 _bus_dmamem_alloc, 96 _bus_dmamem_free, 97 _bus_dmamem_map, 98 _bus_dmamem_unmap, 99 _bus_dmamem_mmap, 100 _bus_dma_phys_to_bus_mem_generic, 101 _bus_dma_bus_mem_to_phys_generic, 102}; 103 104static const struct elb_dev elb_devs[] = { 105 { "cpu", 0, 0, -1, NULL }, 106 { "pckbc", BASE_PCKBC, BASE_PCKBC2, 31, &elb_tag }, 107 { "com", BASE_COM, 0, 30, &elb_tag }, 108 { "lpt", BASE_LPT, 0, -1, &elb_tag }, 109 { "fb", BASE_FB, BASE_FB2, -1, &elb_fb_tag }, 110 { "le", BASE_LE, 0, 28, &elb_fb_tag }, 111}; 112 113CFATTACH_DECL_NEW(elb, 0, 114 elb_match, elb_attach, NULL, NULL); 115 116/* 117 * Probe for the elb; always succeeds. 118 */ 119static int 120elb_match(device_t parent, cfdata_t cf, void *aux) 121{ 122 return (1); 123} 124 125/* 126 * Attach the Explora local bus. 127 */ 128static void 129elb_attach(device_t parent, device_t self, void *aux) 130{ 131 struct elb_attach_args eaa; 132 const struct elb_dev *elb; 133 size_t i; 134 135 printf("\n"); 136 for (i = 0, elb = elb_devs; i < __arraycount(elb_devs); i++, elb++) { 137 eaa.elb_name = elb->elb_name; 138 eaa.elb_bt = elb_get_bus_space_tag(elb->elb_addr); 139 eaa.elb_dmat = &elb_bus_dma_tag; 140 eaa.elb_base = elb->elb_addr; 141 eaa.elb_base2 = elb->elb_addr2; 142 eaa.elb_irq = elb->elb_irq; 143 144 (void) config_found(self, &eaa, elb_print, CFARGS_NONE); 145 } 146} 147 148static int 149elb_print(void *aux, const char *pnp) 150{ 151 struct elb_attach_args *eaa = aux; 152 153 if (pnp) 154 aprint_normal("%s at %s", eaa->elb_name, pnp); 155 if (eaa->elb_irq != -1) 156 aprint_normal(" irq %d", eaa->elb_irq); 157 158 return (UNCONF); 159} 160 161bus_space_tag_t 162elb_get_bus_space_tag(bus_addr_t addr) 163{ 164 165 if ((addr & 0xff000000) == 0x74000000) { 166 if (!elb_tag_init_done) { 167 if (bus_space_init(&elb_tag, "elbtag", 168 elb_ex_storage, sizeof(elb_ex_storage))) 169 panic("elb_get_bus_space_tag: elb_tag"); 170 171 elb_tag_init_done = true; 172 } 173 return (&elb_tag); 174 } else { 175 if (!elbfb_tag_init_done) { 176 if (bus_space_init(&elb_fb_tag, "elbfbtag", 177 elbfb_ex_storage, sizeof(elbfb_ex_storage))) 178 panic("elb_get_bus_space_tag: elb_fb_tag"); 179 180 elbfb_tag_init_done = true; 181 } 182 return (&elb_fb_tag); 183 } 184} 185