1 /* $NetBSD: jensenio.c,v 1.25 2025/10/19 20:35:01 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 /* 33 * Driver for the Jensen I/O bus. 34 * 35 * The Jensen I/O `bus' is comprised of two things: 36 * 37 * - VLSI VL82C106 junk I/O chip 38 * - Intel EISA bus interface 39 * 40 * Access to the 82C106 is different than to the rest of EISA space, even 41 * though it is a single address space. 42 */ 43 44 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 45 46 __KERNEL_RCSID(0, "$NetBSD: jensenio.c,v 1.25 2025/10/19 20:35:01 thorpej Exp $"); 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/device.h> 51 52 #include <machine/autoconf.h> 53 54 #include <dev/eisa/eisavar.h> 55 56 #include <dev/isa/isareg.h> 57 #include <dev/isa/isavar.h> 58 59 #include <alpha/jensenio/jensenioreg.h> 60 #include <alpha/jensenio/jenseniovar.h> 61 62 #include "locators.h" 63 64 #include "eisa.h" 65 66 /* 67 * The devices built-in to the VLSI VL82C106 junk I/O chip. 68 */ 69 static const struct jensenio_dev { 70 const char *jd_name; /* device name */ 71 bus_addr_t jd_ioaddr; /* I/O space address */ 72 int jd_irq[2]; /* Jensen IRQs */ 73 } jensenio_devs[] = { 74 { "pckbc", IO_KBD, { 0x980, 0x990 } }, 75 { "com", IO_COM1, { 0x900, -1 } }, 76 { "com", IO_COM2, { 0x920, -1 } }, 77 { "lpt", IO_LPT3, { 1, -1 } }, 78 { "mcclock", 0x170, { -1, -1 } }, 79 { NULL, 0, { -1, -1 } }, 80 }; 81 82 static int jensenio_match(device_t, cfdata_t, void *); 83 static void jensenio_attach(device_t, device_t, void *); 84 85 CFATTACH_DECL_NEW(jensenio, 0, jensenio_match, jensenio_attach, NULL, NULL); 86 87 static int jensenio_print(void *, const char *); 88 89 static int jensenio_attached; 90 91 struct jensenio_config jensenio_configuration; 92 93 static void jensenio_eisa_attach_hook(device_t, device_t, 94 struct eisabus_attach_args *); 95 static int jensenio_eisa_maxslots(void *); 96 97 static void jensenio_isa_attach_hook(device_t, device_t, 98 struct isabus_attach_args *); 99 100 static void jensenio_isa_detach_hook(isa_chipset_tag_t, device_t); 101 102 /* 103 * Set up the Jensen's function pointers. 104 */ 105 void 106 jensenio_init(struct jensenio_config *jcp) 107 { 108 109 /* 110 * Initialize the Host Address Extension register to 0 111 * (the firmware should have already done this). We will 112 * disallow mapping of any device who's address would 113 * require a non-0 HAE. This should be safe as the final 114 * draft of the Jensen system specification states that 115 * applications should follow this little rule. 116 * 117 * There's a good reason for this; actually using HAE would 118 * require a mutex around *every* EISA cycle! Gross! 119 */ 120 REGVAL(JENSEN_HAE) = 0; 121 alpha_mb(); 122 123 if (jcp->jc_initted == 0) { 124 /* don't do these twice since they set up extents */ 125 jensenio_bus_io_init(&jcp->jc_eisa_iot, jcp); 126 jensenio_bus_intio_init(&jcp->jc_internal_iot, jcp); 127 jensenio_bus_mem_init(&jcp->jc_eisa_memt, jcp); 128 } 129 } 130 131 static int 132 jensenio_match(device_t parent, cfdata_t cf, void *aux) 133 { 134 struct mainbus_attach_args *ma = aux; 135 136 if (strcmp(ma->ma_name, cf->cf_name) != 0) 137 return (0); 138 139 /* There can be only one. */ 140 if (jensenio_attached) 141 return (0); 142 143 return (1); 144 } 145 146 static void 147 jensenio_attach(device_t parent, device_t self, void *aux) 148 { 149 struct jensenio_attach_args ja; 150 struct jensenio_config *jcp = &jensenio_configuration; 151 int i; 152 int locs[JENSENIOCF_NLOCS]; 153 154 printf("\n"); 155 156 jensenio_attached = 1; 157 158 /* 159 * Done once at console init time, but we might need to do 160 * additional work this time. 161 */ 162 jensenio_init(jcp); 163 164 /* 165 * Initialize DMA. 166 */ 167 jensenio_dma_init(jcp); 168 169 /* 170 * Initialize interrupts. 171 */ 172 jensenio_intr_init(jcp); 173 174 /* 175 * First attach all of the built-in devices. 176 */ 177 for (i = 0; jensenio_devs[i].jd_name != NULL; i++) { 178 ja.ja_name = jensenio_devs[i].jd_name; 179 ja.ja_ioaddr = jensenio_devs[i].jd_ioaddr; 180 ja.ja_irq[0] = jensenio_devs[i].jd_irq[0]; 181 ja.ja_irq[1] = jensenio_devs[i].jd_irq[1]; 182 183 ja.ja_iot = &jcp->jc_internal_iot; 184 ja.ja_ec = &jcp->jc_ec; 185 186 locs[JENSENIOCF_PORT] = jensenio_devs[i].jd_ioaddr; 187 config_found(self, &ja, jensenio_print, 188 CFARGS(.submatch = config_stdsubmatch, 189 .iattr = "jensenio", 190 .locators = locs)); 191 } 192 193 /* 194 * Attach the EISA bus. 195 */ 196 jcp->jc_ec.ec_attach_hook = jensenio_eisa_attach_hook; 197 jcp->jc_ec.ec_maxslots = jensenio_eisa_maxslots; 198 199 ja.ja_eisa.eba_iot = &jcp->jc_eisa_iot; 200 ja.ja_eisa.eba_memt = &jcp->jc_eisa_memt; 201 ja.ja_eisa.eba_dmat = &jcp->jc_dmat_eisa; 202 ja.ja_eisa.eba_ec = &jcp->jc_ec; 203 eisabus_attach(self, &ja.ja_eisa); 204 205 /* 206 * Attach the ISA bus. 207 */ 208 jcp->jc_ic.ic_attach_hook = jensenio_isa_attach_hook; 209 jcp->jc_ic.ic_detach_hook = jensenio_isa_detach_hook; 210 211 ja.ja_isa.iba_iot = &jcp->jc_eisa_iot; 212 ja.ja_isa.iba_memt = &jcp->jc_eisa_memt; 213 ja.ja_isa.iba_dmat = &jcp->jc_dmat_isa; 214 ja.ja_isa.iba_ic = &jcp->jc_ic; 215 isabus_attach(self, &ja.ja_isa); 216 } 217 218 static int 219 jensenio_print(void *aux, const char *pnp) 220 { 221 struct jensenio_attach_args *ja = aux; 222 223 if (pnp != NULL) 224 aprint_normal("%s at %s", ja->ja_name, pnp); 225 226 aprint_normal(" port 0x%lx", ja->ja_ioaddr); 227 228 return (UNCONF); 229 } 230 231 static void 232 jensenio_eisa_attach_hook(device_t parent, device_t self, 233 struct eisabus_attach_args *eba) 234 { 235 236 #if NEISA > 0 237 /* 238 * Jensen's EISA config info is sparse, and is mapped at a 239 * different location that on other EISA systems. 240 */ 241 eisa_config_stride = 0x200; 242 eisa_config_addr = JENSEN_FEPROM1; 243 eisa_init(eba->eba_ec); 244 #endif 245 } 246 247 static int 248 jensenio_eisa_maxslots(void *v) 249 { 250 251 return (8); /* jensen seems to have only 8 valid slots */ 252 } 253 254 static void 255 jensenio_isa_attach_hook(device_t parent, device_t self, 256 struct isabus_attach_args *iba) 257 { 258 259 /* Nothing to do. */ 260 } 261 262 static void 263 jensenio_isa_detach_hook(isa_chipset_tag_t ic, device_t self) 264 { 265 266 /* Nothing to do. */ 267 } 268
Indexes created Tue Oct 21 08:09:48 GMT 2025