wdc_obio.c revision 1.20
1 /* $NetBSD: wdc_obio.c,v 1.20 2002/07/18 13:31:58 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum and by Onno van der Linden. 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 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/malloc.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/bus.h> 47 #include <machine/autoconf.h> 48 49 #include <dev/ata/atareg.h> 50 #include <dev/ata/atavar.h> 51 #include <dev/ic/wdcvar.h> 52 53 #include <dev/ofw/openfirm.h> 54 55 #include <macppc/dev/dbdma.h> 56 57 #define WDC_REG_NPORTS 8 58 #define WDC_AUXREG_OFFSET 0x16 59 #define WDC_DEFAULT_PIO_IRQ 13 /* XXX */ 60 #define WDC_DEFAULT_DMA_IRQ 2 /* XXX */ 61 62 #define WDC_OPTIONS_DMA 0x01 63 64 /* 65 * XXX This code currently doesn't even try to allow 32-bit data port use. 66 */ 67 68 struct wdc_obio_softc { 69 struct wdc_softc sc_wdcdev; 70 struct channel_softc *wdc_chanptr; 71 struct channel_softc wdc_channel; 72 dbdma_regmap_t *sc_dmareg; 73 dbdma_command_t *sc_dmacmd; 74 u_int sc_dmaconf[2]; /* per target value of CONFIG_REG */ 75 void *sc_ih; 76 }; 77 78 int wdc_obio_probe __P((struct device *, struct cfdata *, void *)); 79 void wdc_obio_attach __P((struct device *, struct device *, void *)); 80 int wdc_obio_detach __P((struct device *, int)); 81 int wdc_obio_dma_init __P((void *, int, int, void *, size_t, int)); 82 void wdc_obio_dma_start __P((void *, int, int)); 83 int wdc_obio_dma_finish __P((void *, int, int, int)); 84 85 static void wdc_obio_select __P((struct channel_softc *, int)); 86 static void adjust_timing __P((struct channel_softc *)); 87 static void ata4_adjust_timing __P((struct channel_softc *)); 88 89 struct cfattach wdc_obio_ca = { 90 sizeof(struct wdc_obio_softc), wdc_obio_probe, wdc_obio_attach, 91 wdc_obio_detach, wdcactivate 92 }; 93 94 95 int 96 wdc_obio_probe(parent, match, aux) 97 struct device *parent; 98 struct cfdata *match; 99 void *aux; 100 { 101 struct confargs *ca = aux; 102 char compat[32]; 103 104 /* XXX should not use name */ 105 if (strcmp(ca->ca_name, "ATA") == 0 || 106 strcmp(ca->ca_name, "ata") == 0 || 107 strcmp(ca->ca_name, "ata0") == 0 || 108 strcmp(ca->ca_name, "ide") == 0) 109 return 1; 110 111 memset(compat, 0, sizeof(compat)); 112 OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat)); 113 if (strcmp(compat, "heathrow-ata") == 0 || 114 strcmp(compat, "keylargo-ata") == 0) 115 return 1; 116 117 return 0; 118 } 119 120 void 121 wdc_obio_attach(parent, self, aux) 122 struct device *parent, *self; 123 void *aux; 124 { 125 struct wdc_obio_softc *sc = (void *)self; 126 struct confargs *ca = aux; 127 struct channel_softc *chp = &sc->wdc_channel; 128 int intr; 129 int use_dma = 0; 130 char path[80]; 131 132 if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_DMA) { 133 if (ca->ca_nreg >= 16 || ca->ca_nintr == -1) 134 use_dma = 1; /* XXX Don't work yet. */ 135 } 136 137 if (ca->ca_nintr >= 4 && ca->ca_nreg >= 8) { 138 intr = ca->ca_intr[0]; 139 printf(" irq %d", intr); 140 } else if (ca->ca_nintr == -1) { 141 intr = WDC_DEFAULT_PIO_IRQ; 142 printf(" irq property not found; using %d", intr); 143 } else { 144 printf(": couldn't get irq property\n"); 145 return; 146 } 147 148 if (use_dma) 149 printf(": DMA transfer"); 150 151 printf("\n"); 152 153 chp->cmd_iot = chp->ctl_iot = 154 macppc_make_bus_space_tag(ca->ca_baseaddr + ca->ca_reg[0], 4); 155 156 if (bus_space_map(chp->cmd_iot, 0, WDC_REG_NPORTS, 0, &chp->cmd_ioh) || 157 bus_space_subregion(chp->cmd_iot, chp->cmd_ioh, 158 WDC_AUXREG_OFFSET, 1, &chp->ctl_ioh)) { 159 printf("%s: couldn't map registers\n", 160 sc->sc_wdcdev.sc_dev.dv_xname); 161 return; 162 } 163 #if 0 164 chp->data32iot = chp->cmd_iot; 165 chp->data32ioh = chp->cmd_ioh; 166 #endif 167 168 sc->sc_ih = intr_establish(intr, IST_LEVEL, IPL_BIO, wdcintr, chp); 169 170 if (use_dma) { 171 sc->sc_dmacmd = dbdma_alloc(sizeof(dbdma_command_t) * 20); 172 sc->sc_dmareg = mapiodev(ca->ca_baseaddr + ca->ca_reg[2], 173 ca->ca_reg[3]); 174 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA; 175 sc->sc_wdcdev.DMA_cap = 2; 176 if (strcmp(ca->ca_name, "ata-4") == 0) { 177 sc->sc_wdcdev.cap |= WDC_CAPABILITY_UDMA; 178 sc->sc_wdcdev.UDMA_cap = 4; 179 sc->sc_wdcdev.set_modes = ata4_adjust_timing; 180 } else { 181 sc->sc_wdcdev.set_modes = adjust_timing; 182 } 183 #ifdef notyet 184 /* Minimum cycle time is 150ns (DMA MODE 1) on ohare. */ 185 if (ohare) { 186 sc->sc_wdcdev.PIO_cap = 3; 187 sc->sc_wdcdev.DMA_cap = 1; 188 } 189 #endif 190 } else { 191 /* all non-dma controllers can use adjust_timing */ 192 sc->sc_wdcdev.set_modes = adjust_timing; 193 } 194 195 sc->sc_wdcdev.PIO_cap = 4; 196 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_MODE; 197 sc->wdc_chanptr = chp; 198 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 199 sc->sc_wdcdev.nchannels = 1; 200 sc->sc_wdcdev.dma_arg = sc; 201 sc->sc_wdcdev.dma_init = wdc_obio_dma_init; 202 sc->sc_wdcdev.dma_start = wdc_obio_dma_start; 203 sc->sc_wdcdev.dma_finish = wdc_obio_dma_finish; 204 chp->channel = 0; 205 chp->wdc = &sc->sc_wdcdev; 206 chp->ch_queue = malloc(sizeof(struct channel_queue), 207 M_DEVBUF, M_NOWAIT); 208 if (chp->ch_queue == NULL) { 209 printf("%s: can't allocate memory for command queue", 210 sc->sc_wdcdev.sc_dev.dv_xname); 211 return; 212 } 213 214 #define OHARE_FEATURE_REG 0xf3000038 215 216 /* XXX Enable wdc1 by feature reg. */ 217 memset(path, 0, sizeof(path)); 218 OF_package_to_path(ca->ca_node, path, sizeof(path)); 219 if (strcmp(path, "/bandit@F2000000/ohare@10/ata@21000") == 0) { 220 u_int x; 221 222 x = in32rb(OHARE_FEATURE_REG); 223 x |= 8; 224 out32rb(OHARE_FEATURE_REG, x); 225 } 226 227 wdcattach(chp); 228 sc->sc_wdcdev.set_modes(chp); 229 230 } 231 232 /* Multiword DMA transfer timings */ 233 struct ide_timings { 234 int cycle; /* minimum cycle time [ns] */ 235 int active; /* minimum command active time [ns] */ 236 }; 237 static struct ide_timings pio_timing[5] = { 238 { 600, 180 }, /* Mode 0 */ 239 { 390, 150 }, /* 1 */ 240 { 240, 105 }, /* 2 */ 241 { 180, 90 }, /* 3 */ 242 { 120, 75 } /* 4 */ 243 }; 244 static struct ide_timings dma_timing[3] = { 245 { 480, 240 }, /* Mode 0 */ 246 { 165, 90 }, /* Mode 1 */ 247 { 120, 75 } /* Mode 2 */ 248 }; 249 250 static struct ide_timings udma_timing[5] = { 251 {120, 180}, /* Mode 0 */ 252 { 90, 150}, /* Mode 1 */ 253 { 60, 120}, /* Mode 2 */ 254 { 45, 90}, /* Mode 3 */ 255 { 30, 90} /* Mode 4 */ 256 }; 257 258 #define TIME_TO_TICK(time) howmany((time), 30) 259 #define PIO_REC_OFFSET 4 260 #define PIO_REC_MIN 1 261 #define PIO_ACT_MIN 1 262 #define DMA_REC_OFFSET 1 263 #define DMA_REC_MIN 1 264 #define DMA_ACT_MIN 1 265 266 #define ATA4_TIME_TO_TICK(time) howmany((time), 15) /* 15 ns clock */ 267 268 #define CONFIG_REG (0x200 >> 4) /* IDE access timing register */ 269 270 void 271 wdc_obio_select(chp, drive) 272 struct channel_softc *chp; 273 int drive; 274 { 275 struct wdc_obio_softc *sc = (struct wdc_obio_softc *)chp->wdc; 276 bus_space_write_4(chp->cmd_iot, chp->cmd_ioh, 277 CONFIG_REG, sc->sc_dmaconf[drive]); 278 } 279 280 void 281 adjust_timing(chp) 282 struct channel_softc *chp; 283 { 284 struct wdc_obio_softc *sc = (struct wdc_obio_softc *)chp->wdc; 285 int drive; 286 int min_cycle, min_active; 287 int cycle_tick, act_tick, inact_tick, half_tick; 288 289 for (drive = 0; drive < 2; drive++) { 290 u_int conf = 0; 291 struct ata_drive_datas *drvp; 292 293 drvp = &chp->ch_drive[drive]; 294 /* set up pio mode timings */ 295 if (drvp->drive_flags & DRIVE) { 296 int piomode = drvp->PIO_mode; 297 min_cycle = pio_timing[piomode].cycle; 298 min_active = pio_timing[piomode].active; 299 300 cycle_tick = TIME_TO_TICK(min_cycle); 301 act_tick = TIME_TO_TICK(min_active); 302 if (act_tick < PIO_ACT_MIN) 303 act_tick = PIO_ACT_MIN; 304 inact_tick = cycle_tick - act_tick - PIO_REC_OFFSET; 305 if (inact_tick < PIO_REC_MIN) 306 inact_tick = PIO_REC_MIN; 307 /* mask: 0x000007ff */ 308 conf |= (inact_tick << 5) | act_tick; 309 } 310 /* Set up dma mode timings */ 311 if (drvp->drive_flags & DRIVE_DMA) { 312 int dmamode = drvp->DMA_mode; 313 min_cycle = dma_timing[dmamode].cycle; 314 min_active = dma_timing[dmamode].active; 315 cycle_tick = TIME_TO_TICK(min_cycle); 316 act_tick = TIME_TO_TICK(min_active); 317 inact_tick = cycle_tick - act_tick - DMA_REC_OFFSET; 318 if (inact_tick < DMA_REC_MIN) 319 inact_tick = DMA_REC_MIN; 320 half_tick = 0; /* XXX */ 321 /* mask: 0xfffff800 */ 322 conf |= 323 (half_tick << 21) | 324 (inact_tick << 16) | (act_tick << 11); 325 } 326 #ifdef DEBUG 327 if (conf) { 328 printf("conf[%d] = 0x%x, cyc = %d (%d ns), act = %d (%d ns), inact = %d\n", 329 drive, conf, cycle_tick, min_cycle, act_tick, min_active, inact_tick); 330 } 331 #endif 332 sc->sc_dmaconf[drive] = conf; 333 } 334 sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_SELECT; 335 sc->sc_wdcdev.select = 0; 336 if (sc->sc_dmaconf[0]) { 337 wdc_obio_select(chp,0); 338 if (sc->sc_dmaconf[1] && (sc->sc_dmaconf[0] != sc->sc_dmaconf[1])) { 339 sc->sc_wdcdev.select = wdc_obio_select; 340 sc->sc_wdcdev.cap |= WDC_CAPABILITY_SELECT; 341 } 342 } else if (sc->sc_dmaconf[1]) { 343 wdc_obio_select(chp,1); 344 } 345 wdc_print_modes(chp); 346 } 347 348 void 349 ata4_adjust_timing(chp) 350 struct channel_softc *chp; 351 { 352 struct wdc_obio_softc *sc = (struct wdc_obio_softc *)chp->wdc; 353 int drive; 354 int min_cycle, min_active; 355 int cycle_tick, act_tick, inact_tick; 356 357 for (drive = 0; drive < 2; drive++) { 358 u_int conf = 0; 359 struct ata_drive_datas *drvp; 360 361 drvp = &chp->ch_drive[drive]; 362 /* set up pio mode timings */ 363 364 if (drvp->drive_flags & DRIVE) { 365 int piomode = drvp->PIO_mode; 366 min_cycle = pio_timing[piomode].cycle; 367 min_active = pio_timing[piomode].active; 368 369 cycle_tick = ATA4_TIME_TO_TICK(min_cycle); 370 act_tick = ATA4_TIME_TO_TICK(min_active); 371 inact_tick = cycle_tick - act_tick; 372 /* mask: 0x000003ff */ 373 conf |= (inact_tick << 5) | act_tick; 374 } 375 /* set up dma mode timings */ 376 if (drvp->drive_flags & DRIVE_DMA) { 377 int dmamode = drvp->DMA_mode; 378 min_cycle = dma_timing[dmamode].cycle; 379 min_active = dma_timing[dmamode].active; 380 cycle_tick = ATA4_TIME_TO_TICK(min_cycle); 381 act_tick = ATA4_TIME_TO_TICK(min_active); 382 inact_tick = cycle_tick - act_tick; 383 /* mask: 0x001ffc00 */ 384 conf |= (act_tick << 10) | (inact_tick << 15); 385 } 386 /* set up udma mode timings */ 387 if (drvp->drive_flags & DRIVE_UDMA) { 388 int udmamode = drvp->UDMA_mode; 389 min_cycle = udma_timing[udmamode].cycle; 390 min_active = udma_timing[udmamode].active; 391 act_tick = ATA4_TIME_TO_TICK(min_active); 392 cycle_tick = ATA4_TIME_TO_TICK(min_cycle); 393 /* mask: 0x1ff00000 */ 394 conf |= (cycle_tick << 21) | (act_tick << 25) | 0x100000; 395 } 396 #ifdef DEBUG 397 if (conf) { 398 printf("ata4 conf[%d] = 0x%x, cyc = %d (%d ns), act = %d (%d ns), inact = %d\n", 399 drive, conf, cycle_tick, min_cycle, act_tick, min_active, inact_tick); 400 } 401 #endif 402 sc->sc_dmaconf[drive] = conf; 403 } 404 sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_SELECT; 405 sc->sc_wdcdev.select = 0; 406 if (sc->sc_dmaconf[0]) { 407 wdc_obio_select(chp,0); 408 if (sc->sc_dmaconf[1] && (sc->sc_dmaconf[0] != sc->sc_dmaconf[1])) { 409 sc->sc_wdcdev.select = wdc_obio_select; 410 sc->sc_wdcdev.cap |= WDC_CAPABILITY_SELECT; 411 } 412 } else if (sc->sc_dmaconf[1]) { 413 wdc_obio_select(chp,1); 414 } 415 wdc_print_modes(chp); 416 } 417 418 int 419 wdc_obio_detach(self, flags) 420 struct device *self; 421 int flags; 422 { 423 struct wdc_obio_softc *sc = (void *)self; 424 int error; 425 426 if ((error = wdcdetach(self, flags)) != 0) 427 return error; 428 429 intr_disestablish(sc->sc_ih); 430 431 free(sc->wdc_channel.ch_queue, M_DEVBUF); 432 433 /* Unmap our i/o space. */ 434 bus_space_unmap(chp->cmd_iot, chp->cmd_ioh, WDC_REG_NPORTS); 435 436 /* Unmap DMA registers. */ 437 /* XXX unmapiodev(sc->sc_dmareg); */ 438 /* XXX free(sc->sc_dmacmd); */ 439 440 return 0; 441 } 442 443 int 444 wdc_obio_dma_init(v, channel, drive, databuf, datalen, read) 445 void *v; 446 void *databuf; 447 size_t datalen; 448 int read; 449 { 450 struct wdc_obio_softc *sc = v; 451 vaddr_t va = (vaddr_t)databuf; 452 dbdma_command_t *cmdp; 453 u_int cmd, offset; 454 455 cmdp = sc->sc_dmacmd; 456 cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE; 457 458 offset = va & PGOFSET; 459 460 /* if va is not page-aligned, setup the first page */ 461 if (offset != 0) { 462 int rest = NBPG - offset; /* the rest of the page */ 463 464 if (datalen > rest) { /* if continues to next page */ 465 DBDMA_BUILD(cmdp, cmd, 0, rest, vtophys(va), 466 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, 467 DBDMA_BRANCH_NEVER); 468 datalen -= rest; 469 va += rest; 470 cmdp++; 471 } 472 } 473 474 /* now va is page-aligned */ 475 while (datalen > NBPG) { 476 DBDMA_BUILD(cmdp, cmd, 0, NBPG, vtophys(va), 477 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 478 datalen -= NBPG; 479 va += NBPG; 480 cmdp++; 481 } 482 483 /* the last page (datalen <= NBPG here) */ 484 cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST; 485 DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va), 486 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 487 cmdp++; 488 489 DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0, 490 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 491 492 return 0; 493 } 494 495 void 496 wdc_obio_dma_start(v, channel, drive) 497 void *v; 498 int channel, drive; 499 { 500 struct wdc_obio_softc *sc = v; 501 502 dbdma_start(sc->sc_dmareg, sc->sc_dmacmd); 503 } 504 505 int 506 wdc_obio_dma_finish(v, channel, drive, read) 507 void *v; 508 int channel, drive; 509 int read; 510 { 511 struct wdc_obio_softc *sc = v; 512 513 dbdma_stop(sc->sc_dmareg); 514 return 0; 515 } 516
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