bpp.c revision 1.5
1 /* $NetBSD: bpp.c,v 1.5 2000/07/09 20:57:41 pk 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 Paul Kranenburg. 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/ioctl.h> 41 #include <sys/fcntl.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/vnode.h> 45 #include <sys/poll.h> 46 #include <sys/select.h> 47 #include <sys/malloc.h> 48 #include <sys/proc.h> 49 #include <sys/signalvar.h> 50 #include <sys/conf.h> 51 #include <sys/errno.h> 52 #include <sys/device.h> 53 54 #include <machine/bus.h> 55 #include <machine/intr.h> 56 #include <machine/autoconf.h> 57 #include <machine/conf.h> 58 59 #include <dev/ic/lsi64854reg.h> 60 #include <dev/ic/lsi64854var.h> 61 62 #include <dev/sbus/sbusvar.h> 63 #include <dev/sbus/bppreg.h> 64 65 #define splbpp() spltty() /* XXX */ 66 67 #if 0 68 struct bpp_param { 69 int bpp_dss; /* data setup to strobe */ 70 int bpp_dsw; /* data strobe width */ 71 int bpp_outputpins; /* Select/Autofeed/Init pins */ 72 int bpp_inputpins; /* Error/Select/Paperout pins */ 73 }; 74 #endif 75 76 struct hwstate { 77 u_int16_t hw_hcr; /* Hardware config register */ 78 u_int16_t hw_ocr; /* Operation config register */ 79 u_int8_t hw_tcr; /* Transfer Control register */ 80 u_int8_t hw_or; /* Output register */ 81 u_int16_t hw_irq; /* IRQ; polarity bits only */ 82 }; 83 84 struct bpp_softc { 85 struct lsi64854_softc sc_lsi64854; /* base device */ 86 struct sbusdev sc_sd; /* sbus device */ 87 88 size_t sc_bufsz; /* temp buffer */ 89 caddr_t sc_buf; 90 91 int sc_error; /* bottom-half error */ 92 int sc_flags; 93 #define BPP_OPEN 0x01 /* Device is open */ 94 #define BPP_XCLUDE 0x02 /* Exclusive-open mode */ 95 #define BPP_ASYNC 0x04 /* Asynchronous I/O mode */ 96 #define BPP_LOCKED 0x08 /* DMA in progress */ 97 #define BPP_WANT 0x10 /* Waiting for DMA */ 98 99 struct selinfo sc_rsel; 100 struct selinfo sc_wsel; 101 struct proc *sc_asyncproc; /* Process to notify if async */ 102 103 /* Hardware state */ 104 struct hwstate sc_hwdefault; 105 struct hwstate sc_hwcurrent; 106 }; 107 108 static int bppmatch __P((struct device *, struct cfdata *, void *)); 109 static void bppattach __P((struct device *, struct device *, void *)); 110 static int bppintr __P((void *)); 111 static void bpp_setparams __P((struct bpp_softc *, struct hwstate *)); 112 113 struct cfattach bpp_ca = { 114 sizeof(struct bpp_softc), bppmatch, bppattach 115 }; 116 117 extern struct cfdriver bpp_cd; 118 #define BPPUNIT(dev) (minor(dev)) 119 120 121 int 122 bppmatch(parent, cf, aux) 123 struct device *parent; 124 struct cfdata *cf; 125 void *aux; 126 { 127 struct sbus_attach_args *sa = aux; 128 129 return (strcmp("SUNW,bpp", sa->sa_name) == 0); 130 } 131 132 void 133 bppattach(parent, self, aux) 134 struct device *parent, *self; 135 void *aux; 136 { 137 struct sbus_attach_args *sa = aux; 138 struct bpp_softc *dsc = (void *)self; 139 struct lsi64854_softc *sc = &dsc->sc_lsi64854; 140 int burst, sbusburst; 141 int node; 142 143 sc->sc_bustag = sa->sa_bustag; 144 sc->sc_dmatag = sa->sa_dmatag; 145 node = sa->sa_node; 146 147 /* Map device registers */ 148 if (bus_space_map2(sa->sa_bustag, 149 sa->sa_slot, 150 sa->sa_offset, 151 sa->sa_size, 152 BUS_SPACE_MAP_LINEAR, 153 0, &sc->sc_regs) != 0) { 154 printf("%s: cannot map registers\n", self->dv_xname); 155 return; 156 } 157 158 /* 159 * Get transfer burst size from PROM and plug it into the 160 * controller registers. This is needed on the Sun4m; do 161 * others need it too? 162 */ 163 sbusburst = ((struct sbus_softc *)parent)->sc_burst; 164 if (sbusburst == 0) 165 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */ 166 167 burst = getpropint(node, "burst-sizes", -1); 168 if (burst == -1) 169 /* take SBus burst sizes */ 170 burst = sbusburst; 171 172 /* Clamp at parent's burst sizes */ 173 burst &= sbusburst; 174 sc->sc_burst = (burst & SBUS_BURST_32) ? 32 : 175 (burst & SBUS_BURST_16) ? 16 : 0; 176 177 /* Join the Sbus device family */ 178 dsc->sc_sd.sd_reset = (void *)0; 179 sbus_establish(&dsc->sc_sd, self); 180 181 /* Initialize the DMA channel */ 182 sc->sc_channel = L64854_CHANNEL_PP; 183 lsi64854_attach(sc); 184 185 /* Establish interrupt handler */ 186 if (sa->sa_nintr) { 187 sc->sc_intrchain = bppintr; 188 sc->sc_intrchainarg = dsc; 189 (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_TTY, 0, 190 lsi64854_pp_intr, sc); 191 } 192 193 /* Allocate buffer XXX - should actually use dmamap_uio() */ 194 dsc->sc_bufsz = 1024; 195 dsc->sc_buf = malloc(dsc->sc_bufsz, M_DEVBUF, M_NOWAIT); 196 197 /* XXX read default state */ 198 { 199 bus_space_handle_t h = sc->sc_regs; 200 struct hwstate *hw = &dsc->sc_hwdefault; 201 hw->hw_hcr = bus_space_read_2(sc->sc_bustag, h, L64854_REG_HCR); 202 hw->hw_ocr = bus_space_read_2(sc->sc_bustag, h, L64854_REG_OCR); 203 hw->hw_tcr = bus_space_read_1(sc->sc_bustag, h, L64854_REG_TCR); 204 hw->hw_or = bus_space_read_1(sc->sc_bustag, h, L64854_REG_OR); 205 } 206 } 207 208 void 209 bpp_setparams(sc, hw) 210 struct bpp_softc *sc; 211 struct hwstate *hw; 212 { 213 u_int16_t irq; 214 bus_space_tag_t t = sc->sc_lsi64854.sc_bustag; 215 bus_space_handle_t h = sc->sc_lsi64854.sc_regs; 216 217 bus_space_write_2(t, h, L64854_REG_HCR, hw->hw_hcr); 218 bus_space_write_2(t, h, L64854_REG_OCR, hw->hw_ocr); 219 bus_space_write_1(t, h, L64854_REG_TCR, hw->hw_tcr); 220 bus_space_write_1(t, h, L64854_REG_OR, hw->hw_or); 221 222 /* Only change IRP settings in interrupt status register */ 223 irq = bus_space_read_2(t, h, L64854_REG_ICR); 224 irq &= ~BPP_ALLIRP; 225 irq |= (hw->hw_irq & BPP_ALLIRP); 226 bus_space_write_2(t, h, L64854_REG_ICR, irq); 227 } 228 229 int 230 bppopen(dev, flags, mode, p) 231 dev_t dev; 232 int flags, mode; 233 struct proc *p; 234 { 235 int unit = BPPUNIT(dev); 236 struct bpp_softc *sc; 237 struct lsi64854_softc *lsi; 238 u_int16_t irq; 239 int s; 240 241 if (unit >= bpp_cd.cd_ndevs) 242 return (ENXIO); 243 sc = bpp_cd.cd_devs[unit]; 244 245 if ((sc->sc_flags & (BPP_OPEN|BPP_XCLUDE)) == (BPP_OPEN|BPP_XCLUDE)) 246 return (EBUSY); 247 248 lsi = &sc->sc_lsi64854; 249 250 /* Set default parameters */ 251 sc->sc_hwcurrent = sc->sc_hwdefault; 252 s = splbpp(); 253 bpp_setparams(sc, &sc->sc_hwdefault); 254 splx(s); 255 256 /* Enable interrupts */ 257 irq = BPP_ALLEN; 258 irq |= sc->sc_hwdefault.hw_irq; 259 bus_space_write_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR, irq); 260 return (0); 261 } 262 263 int 264 bppclose(dev, flags, mode, p) 265 dev_t dev; 266 int flags, mode; 267 struct proc *p; 268 { 269 struct bpp_softc *sc = bpp_cd.cd_devs[BPPUNIT(dev)]; 270 struct lsi64854_softc *lsi = &sc->sc_lsi64854; 271 u_int16_t irq; 272 273 /* Turn off all interrupt enables */ 274 irq = sc->sc_hwdefault.hw_irq | BPP_ALLIRQ; 275 irq &= ~BPP_ALLEN; 276 bus_space_write_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR, irq); 277 278 sc->sc_asyncproc = NULL; 279 sc->sc_flags = 0; 280 return (0); 281 } 282 283 int 284 bppread(dev, uio, flags) 285 dev_t dev; 286 struct uio *uio; 287 int flags; 288 { 289 290 return (ENXIO); 291 } 292 293 int 294 bppwrite(dev, uio, flags) 295 dev_t dev; 296 struct uio *uio; 297 int flags; 298 { 299 struct bpp_softc *sc = bpp_cd.cd_devs[BPPUNIT(dev)]; 300 struct lsi64854_softc *lsi = &sc->sc_lsi64854; 301 int error = 0; 302 int s; 303 304 /* 305 * Wait until the DMA engine is free. 306 */ 307 s = splbpp(); 308 while ((sc->sc_flags & BPP_LOCKED) != 0) { 309 if ((flags & IO_NDELAY) != 0) { 310 splx(s); 311 return (EWOULDBLOCK); 312 } 313 314 sc->sc_flags |= BPP_WANT; 315 error = tsleep(sc->sc_buf, PZERO|PCATCH, "bppwrite", 0); 316 if (error != 0) { 317 splx(s); 318 return (error); 319 } 320 } 321 sc->sc_flags |= BPP_LOCKED; 322 splx(s); 323 324 /* 325 * Move data from user space into our private buffer 326 * and start DMA. 327 */ 328 while (uio->uio_resid > 0) { 329 caddr_t bp = sc->sc_buf; 330 size_t len = min(sc->sc_bufsz, uio->uio_resid); 331 332 if ((error = uiomove(bp, len, uio)) != 0) 333 break; 334 335 while (len > 0) { 336 u_int8_t tcr; 337 size_t size = len; 338 DMA_SETUP(lsi, &bp, &len, 0, &size); 339 340 /* Clear direction control bit */ 341 tcr = bus_space_read_1(lsi->sc_bustag, lsi->sc_regs, 342 L64854_REG_TCR); 343 tcr &= ~BPP_TCR_DIR; 344 bus_space_write_1(lsi->sc_bustag, lsi->sc_regs, 345 L64854_REG_TCR, tcr); 346 347 /* Enable DMA */ 348 s = splbpp(); 349 DMA_GO(lsi); 350 error = tsleep(sc, PZERO|PCATCH, "bppdma", 0); 351 splx(s); 352 if (error != 0) 353 goto out; 354 355 /* Bail out if bottom half reported an error */ 356 if ((error = sc->sc_error) != 0) 357 goto out; 358 359 len -= size; 360 } 361 } 362 363 out: 364 s = splbpp(); 365 sc->sc_flags &= ~BPP_LOCKED; 366 if ((sc->sc_flags & BPP_WANT) != 0) { 367 sc->sc_flags &= ~BPP_WANT; 368 wakeup(sc->sc_buf); 369 } 370 splx(s); 371 return (error); 372 } 373 374 /* move to header: */ 375 #define BPPIOCSPARAM _IOW('P', 0x1, struct hwstate) 376 #define BPPIOCGPARAM _IOR('P', 0x2, struct hwstate) 377 378 int 379 bppioctl(dev, cmd, data, flag, p) 380 dev_t dev; 381 u_long cmd; 382 caddr_t data; 383 int flag; 384 struct proc *p; 385 { 386 struct bpp_softc *sc = bpp_cd.cd_devs[BPPUNIT(dev)]; 387 struct hwstate *hw, *chw; 388 int error = 0; 389 int s; 390 391 switch(cmd) { 392 case BPPIOCSPARAM: 393 chw = &sc->sc_hwcurrent; 394 hw = (struct hwstate *)data; 395 396 /* 397 * Extract and store user-settable bits. 398 */ 399 #define _bpp_set(reg,mask) do { \ 400 chw->reg &= ~(mask); \ 401 chw->reg |= (hw->reg & (mask)); \ 402 } while (0) 403 _bpp_set(hw_hcr, BPP_HCR_DSS_MASK|BPP_HCR_DSW_MASK); 404 _bpp_set(hw_ocr, BPP_OCR_USER); 405 _bpp_set(hw_tcr, BPP_TCR_USER); 406 _bpp_set(hw_or, BPP_OR_USER); 407 _bpp_set(hw_irq, BPP_IRQ_USER); 408 #undef _bpp_set 409 410 /* Apply settings */ 411 s = splbpp(); 412 bpp_setparams(sc, chw); 413 splx(s); 414 break; 415 case BPPIOCGPARAM: 416 *((struct hwstate *)data) = sc->sc_hwcurrent; 417 break; 418 case TIOCEXCL: 419 s = splbpp(); 420 sc->sc_flags |= BPP_XCLUDE; 421 splx(s); 422 break; 423 case TIOCNXCL: 424 s = splbpp(); 425 sc->sc_flags &= ~BPP_XCLUDE; 426 splx(s); 427 break; 428 case FIOASYNC: 429 s = splbpp(); 430 if (*(int *)data) { 431 if (sc->sc_asyncproc != NULL) 432 error = EBUSY; 433 else 434 sc->sc_asyncproc = p; 435 } else 436 sc->sc_asyncproc = NULL; 437 splx(s); 438 break; 439 default: 440 break; 441 } 442 443 return (error); 444 } 445 446 int 447 bpppoll(dev, events, p) 448 dev_t dev; 449 int events; 450 struct proc *p; 451 { 452 struct bpp_softc *sc = bpp_cd.cd_devs[BPPUNIT(dev)]; 453 int revents = 0; 454 455 if (events & (POLLIN | POLLRDNORM)) { 456 /* read is not yet implemented */ 457 } 458 459 if (events & (POLLOUT | POLLWRNORM)) { 460 if ((sc->sc_flags & BPP_LOCKED) == 0) 461 revents |= (POLLOUT | POLLWRNORM); 462 } 463 464 if (revents == 0) { 465 if (events & (POLLIN | POLLRDNORM)) 466 selrecord(p, &sc->sc_rsel); 467 if (events & (POLLOUT | POLLWRNORM)) 468 selrecord(p, &sc->sc_wsel); 469 } 470 471 return (revents); 472 } 473 474 int 475 bppintr(arg) 476 void *arg; 477 { 478 struct bpp_softc *sc = arg; 479 struct lsi64854_softc *lsi = &sc->sc_lsi64854; 480 u_int16_t irq; 481 482 irq = bus_space_read_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR); 483 /* Ack all interrupts */ 484 bus_space_write_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR, 485 irq | BPP_ALLIRQ); 486 487 /* Did our device interrupt? */ 488 if ((irq & BPP_ALLIRQ) == 0) 489 return (0); 490 491 if ((sc->sc_flags & BPP_LOCKED) != 0) 492 wakeup(sc); 493 else if ((sc->sc_flags & BPP_WANT) != 0) { 494 sc->sc_flags &= ~BPP_WANT; 495 wakeup(sc->sc_buf); 496 } else { 497 selwakeup(&sc->sc_wsel); 498 if (sc->sc_asyncproc != NULL) 499 psignal(sc->sc_asyncproc, SIGIO); 500 } 501 return (1); 502 } 503
Indexes created Thu Oct 02 14:10:14 GMT 2025