esp_mca.c revision 1.6
1 /* $NetBSD: esp_mca.c,v 1.6 2002/10/02 16:34:09 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jaromir Dolecek <jdolecek (at) NetBSD.org>. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Driver for NCR 53c90, MCA version, with 86c01 DMA controller chip. 41 * 42 * Some of the information used to write this driver was taken 43 * from Tymm Twillman <tymm (at) computer.org>'s Linux MCA NC53c90 driver, 44 * in drivers/scsi/mca_53c9x.c 45 */ 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/errno.h> 52 #include <sys/ioctl.h> 53 #include <sys/device.h> 54 #include <sys/buf.h> 55 #include <sys/proc.h> 56 #include <sys/user.h> 57 #include <sys/queue.h> 58 59 #include <dev/scsipi/scsi_all.h> 60 #include <dev/scsipi/scsipi_all.h> 61 #include <dev/scsipi/scsiconf.h> 62 #include <dev/scsipi/scsi_message.h> 63 64 #include <machine/bus.h> 65 #include <machine/cpu.h> 66 67 #include <dev/ic/ncr53c9xreg.h> 68 #include <dev/ic/ncr53c9xvar.h> 69 70 #include <dev/mca/espvar.h> 71 #include <dev/mca/espreg.h> 72 73 #include <dev/mca/mcavar.h> 74 #include <dev/mca/mcareg.h> 75 #include <dev/mca/mcadevs.h> 76 77 #if 0 78 #if defined(DEBUG) && !defined(NCR53C9X_DEBUG) 79 #define NCR53C9X_DEBUG 80 #endif 81 #endif 82 83 #ifdef NCR53C9X_DEBUG 84 static int esp_mca_debug = 0; 85 #define DPRINTF(x) if (esp_mca_debug) printf x; 86 #else 87 #define DPRINTF(x) 88 #endif 89 90 #define ESP_MCA_IOSIZE 0x20 91 #define ESP_REG_OFFSET 0x10 92 93 static void esp_mca_attach __P((struct device *, struct device *, void *)); 94 static int esp_mca_match __P((struct device *, struct cfdata *, void *)); 95 96 CFATTACH_DECL(esp_mca, sizeof(struct esp_softc), 97 esp_mca_match, esp_mca_attach, NULL, NULL); 98 99 /* 100 * Functions and the switch for the MI code. 101 */ 102 static u_char esp_read_reg __P((struct ncr53c9x_softc *, int)); 103 static void esp_write_reg __P((struct ncr53c9x_softc *, int, u_char)); 104 static int esp_dma_isintr __P((struct ncr53c9x_softc *)); 105 static void esp_dma_reset __P((struct ncr53c9x_softc *)); 106 static int esp_dma_intr __P((struct ncr53c9x_softc *)); 107 static int esp_dma_setup __P((struct ncr53c9x_softc *, caddr_t *, 108 size_t *, int, size_t *)); 109 static void esp_dma_go __P((struct ncr53c9x_softc *)); 110 static void esp_dma_stop __P((struct ncr53c9x_softc *)); 111 static int esp_dma_isactive __P((struct ncr53c9x_softc *)); 112 113 static struct ncr53c9x_glue esp_glue = { 114 esp_read_reg, 115 esp_write_reg, 116 esp_dma_isintr, 117 esp_dma_reset, 118 esp_dma_intr, 119 esp_dma_setup, 120 esp_dma_go, 121 esp_dma_stop, 122 esp_dma_isactive, 123 NULL, /* gl_clear_latched_intr */ 124 }; 125 126 static int 127 esp_mca_match(parent, cf, aux) 128 struct device *parent; 129 struct cfdata *cf; 130 void *aux; 131 { 132 struct mca_attach_args *ma = aux; 133 134 switch (ma->ma_id) { 135 case MCA_PRODUCT_NCR53C90: 136 return 1; 137 } 138 139 return 0; 140 } 141 142 static void 143 esp_mca_attach(parent, self, aux) 144 struct device *parent, *self; 145 void *aux; 146 { 147 struct mca_attach_args *ma = aux; 148 struct esp_softc *esc = (void *)self; 149 struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x; 150 u_int16_t iobase; 151 int scsi_id, irq, drq, error; 152 bus_space_handle_t ioh; 153 int pos2, pos3, pos5; 154 155 static const u_int16_t ncrmca_iobase[] = { 156 0, 0x240, 0x340, 0x400, 0x420, 0x3240, 0x8240, 0xa240 157 }; 158 159 /* 160 * NCR SCSI Adapter (ADF 7f4f) 161 * 162 * POS register 2: (adf pos0) 163 * 164 * 7 6 5 4 3 2 1 0 165 * \_/ \___/ \__ enable: 0=adapter disabled, 1=adapter enabled 166 * | \____ I/O base (32B): 001=0x240 010=0x340 011=0x400 167 * | 100=0x420 101=0x3240 110=0x8240 111=0xa240 168 * \__________ IRQ: 00=3 01=5 10=7 11=9 169 * 170 * POS register 3: (adf pos1) 171 * 172 * 7 6 5 4 3 2 1 0 173 * 1 1 1 | \_____/ 174 * | \__ DMA level 175 * \_________ Fairness: 1=enabled 0=disabled 176 * 177 * POS register 5: (adf pos3) 178 * 179 * 7 6 5 4 3 2 1 0 180 * 1 | \___/ 181 * | \__ Static Ram: 0xC8000-0xC87FF + XX*0x4000 182 * \___________ Host Adapter ID: 1=7 0=6 183 */ 184 185 pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2); 186 pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3); 187 pos5 = mca_conf_read(ma->ma_mc, ma->ma_slot, 5); 188 189 iobase = ncrmca_iobase[(pos2 & 0x0e) >> 1]; 190 irq = 3 + 2*((pos2 & 0x30) >> 4); 191 drq = (pos3 & 0x0f); 192 scsi_id = 6 + ((pos5 & 0x20) ? 1 : 0); 193 194 printf(" slot %d irq %d drq %d: NCR SCSI Adapter\n", 195 ma->ma_slot + 1, irq, drq); 196 197 /* Map the 86C01 registers */ 198 if (bus_space_map(ma->ma_iot, iobase, ESP_MCA_IOSIZE, 0, &ioh)) { 199 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 200 return; 201 } 202 203 esc->sc_iot = ma->ma_iot; 204 esc->sc_ioh = ioh; 205 206 /* Submap the 'esp' registers */ 207 if (bus_space_subregion(ma->ma_iot, ioh, ESP_REG_OFFSET, 208 ESP_MCA_IOSIZE-ESP_REG_OFFSET, &esc->sc_esp_ioh)) { 209 printf("%s: can't subregion i/o space\n", sc->sc_dev.dv_xname); 210 return; 211 } 212 213 /* Setup DMA map */ 214 esc->sc_dmat = ma->ma_dmat; 215 if ((error = mca_dmamap_create(esc->sc_dmat, MAXPHYS, 216 BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW | MCABUS_DMA_IOPORT, 217 &esc->sc_xfer, drq)) != 0){ 218 printf("%s: couldn't create DMA map - error %d\n", 219 sc->sc_dev.dv_xname, error); 220 return; 221 } 222 223 /* MI code glue */ 224 sc->sc_id = scsi_id; 225 sc->sc_freq = 25; /* Mhz */ 226 227 sc->sc_glue = &esp_glue; 228 229 sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB; //| NCRCFG1_SLOW; 230 /* No point setting sc_cfg[2345], they won't be used */ 231 232 sc->sc_rev = NCR_VARIANT_NCR53C90_86C01; 233 sc->sc_minsync = 0; 234 235 /* max 64KB DMA */ 236 sc->sc_maxxfer = 64 * 1024; 237 238 /* Establish interrupt */ 239 esc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_BIO, ncr53c9x_intr, 240 esc); 241 if (esc->sc_ih == NULL) { 242 printf("%s: couldn't establish interrupt\n", 243 sc->sc_dev.dv_xname); 244 return; 245 } 246 247 /* 248 * Massage the 86C01 chip - setup MCA DMA controller for DMA via 249 * the 86C01 register, and enable 86C01 interrupts. 250 */ 251 mca_dma_set_ioport(drq, iobase + N86C01_PIO); 252 253 bus_space_write_1(esc->sc_iot, esc->sc_ioh, N86C01_MODE_ENABLE, 254 bus_space_read_1(esc->sc_iot, esc->sc_ioh, N86C01_MODE_ENABLE) 255 | N86C01_INTR_ENABLE); 256 257 /* 258 * Now try to attach all the sub-devices 259 */ 260 sc->sc_adapter.adapt_minphys = minphys; 261 sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request; 262 263 /* Do the common parts of attachment. */ 264 printf("%s", sc->sc_dev.dv_xname); 265 ncr53c9x_attach(sc); 266 } 267 268 /* 269 * Glue functions. 270 */ 271 272 static u_char 273 esp_read_reg(sc, reg) 274 struct ncr53c9x_softc *sc; 275 int reg; 276 { 277 struct esp_softc *esc = (struct esp_softc *)sc; 278 279 return (bus_space_read_1(esc->sc_iot, esc->sc_esp_ioh, reg)); 280 } 281 282 static void 283 esp_write_reg(sc, reg, val) 284 struct ncr53c9x_softc *sc; 285 int reg; 286 u_char val; 287 { 288 struct esp_softc *esc = (struct esp_softc *)sc; 289 290 bus_space_write_1(esc->sc_iot, esc->sc_esp_ioh, reg, val); 291 } 292 293 static int 294 esp_dma_isintr(sc) 295 struct ncr53c9x_softc *sc; 296 { 297 struct esp_softc *esc = (struct esp_softc *)sc; 298 299 DPRINTF(("[esp_dma_isintr] ")); 300 return (bus_space_read_1(esc->sc_iot, esc->sc_ioh, 301 N86C01_STATUS) & N86C01_IRQ_PEND); 302 } 303 304 static void 305 esp_dma_reset(sc) 306 struct ncr53c9x_softc *sc; 307 { 308 struct esp_softc *esc = (struct esp_softc *)sc; 309 310 DPRINTF(("[esp_dma_reset] ")); 311 312 if (esc->sc_flags & ESP_XFER_LOADED) { 313 bus_dmamap_unload(esc->sc_dmat, esc->sc_xfer); 314 esc->sc_flags &= ~ESP_XFER_LOADED; 315 } 316 317 if (esc->sc_flags & ESP_XFER_ACTIVE) { 318 esc->sc_flags &= ~ESP_XFER_ACTIVE; 319 mca_disk_unbusy(); 320 } 321 } 322 323 static int 324 esp_dma_intr(sc) 325 struct ncr53c9x_softc *sc; 326 { 327 struct esp_softc *esc = (struct esp_softc *) sc; 328 DPRINTF(("[esp_dma_intr] ")); 329 330 if ((esc->sc_flags & ESP_XFER_ACTIVE) == 0) { 331 printf("%s: dma_intr--inactive DMA\n", sc->sc_dev.dv_xname); 332 return (-1); 333 } 334 335 if ((sc->sc_espintr & NCRINTR_BS) == 0) { 336 esc->sc_flags &= ~ESP_XFER_ACTIVE; 337 mca_disk_unbusy(); 338 return (0); 339 } 340 341 sc->sc_espstat |= NCRSTAT_TC; /* XXX */ 342 343 if ((sc->sc_espstat & NCRSTAT_TC) == 0) { 344 printf("%s: DMA not complete?\n", sc->sc_dev.dv_xname); 345 return (1); 346 } 347 348 bus_dmamap_sync(esc->sc_dmat, esc->sc_xfer, 0, 349 *esc->sc_xfer_len, 350 (esc->sc_flags & ESP_XFER_READ) 351 ? BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 352 353 bus_dmamap_unload(esc->sc_dmat, esc->sc_xfer); 354 esc->sc_flags &= ~ESP_XFER_LOADED; 355 356 *esc->sc_xfer_addr += *esc->sc_xfer_len; 357 *esc->sc_xfer_len = 0; 358 359 esc->sc_flags &= ~ESP_XFER_ACTIVE; 360 mca_disk_unbusy(); 361 362 return (0); 363 } 364 365 /* 366 * Setup DMA transfer. 367 */ 368 static int 369 esp_dma_setup(sc, addr, len, datain, dmasize) 370 struct ncr53c9x_softc *sc; 371 caddr_t *addr; 372 size_t *len; 373 int datain; 374 size_t *dmasize; 375 { 376 struct esp_softc *esc = (struct esp_softc *) sc; 377 int error; 378 int fl; 379 380 DPRINTF(("[esp_dma_setup] ")); 381 382 if (esc->sc_flags & ESP_XFER_LOADED) { 383 printf("%s: esp_dma_setup: unloading leaked xfer\n", 384 sc->sc_dev.dv_xname); 385 bus_dmamap_unload(esc->sc_dmat, esc->sc_xfer); 386 esc->sc_flags &= ~ESP_XFER_LOADED; 387 } 388 389 /* Load the buffer for DMA transfer. */ 390 fl = (datain) ? BUS_DMA_READ : BUS_DMA_WRITE; 391 392 if ((error = bus_dmamap_load(esc->sc_dmat, esc->sc_xfer, *addr, 393 *len, NULL, BUS_DMA_STREAMING|fl))) { 394 printf("%s: esp_dma_setup: unable to load DMA buffer - error %d\n", 395 sc->sc_dev.dv_xname, error); 396 return (error); 397 } 398 399 bus_dmamap_sync(esc->sc_dmat, esc->sc_xfer, 0, 400 *len, (datain) ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 401 402 esc->sc_flags |= ESP_XFER_LOADED | (datain ? ESP_XFER_READ : 0); 403 esc->sc_xfer_addr = addr; 404 esc->sc_xfer_len = len; 405 406 return (0); 407 } 408 409 static void 410 esp_dma_go(sc) 411 struct ncr53c9x_softc *sc; 412 { 413 struct esp_softc *esc = (struct esp_softc *) sc; 414 DPRINTF(("[esp_dma_go] ")); 415 416 esc->sc_flags |= ESP_XFER_ACTIVE; 417 mca_disk_busy(); 418 } 419 420 static void 421 esp_dma_stop(sc) 422 struct ncr53c9x_softc *sc; 423 { 424 DPRINTF(("[esp_dma_stop] ")); 425 426 panic("%s: stop not yet implemented", sc->sc_dev.dv_xname); 427 } 428 429 static int 430 esp_dma_isactive(sc) 431 struct ncr53c9x_softc *sc; 432 { 433 struct esp_softc *esc = (struct esp_softc *) sc; 434 DPRINTF(("[esp_dma_isactive] ")); 435 436 return (esc->sc_flags & ESP_XFER_ACTIVE); 437 } 438
Indexes created Tue Sep 30 11:09:46 GMT 2025