1 /*- 2 * Copyright (c) 2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The names of the authors may not be used to endorse or promote 14 * products derived from this software without specific prior written 15 * permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #ifdef _KERNEL 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/kthread.h> 39 #include <sys/conf.h> 40 #include <sys/bus.h> 41 #include <machine/bus.h> 42 #include <machine/resource.h> 43 #include <sys/rman.h> 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/pcivar.h> 46 #include <pci_if.h> 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 50 #endif /* _KERNEL */ 51 52 #include <sys/ioccom.h> 53 54 struct wave { 55 int index; 56 int period; 57 int offset; 58 int length; 59 int avg; 60 off_t mapvir; 61 int flags; 62 63 int npages; 64 void **virtual; 65 }; 66 67 #define ADLINK_SETWAVE _IOWR('A', 232, struct wave) 68 #define ADLINK_GETWAVE _IOWR('A', 233, struct wave) 69 70 #ifdef _KERNEL 71 72 #define INTPERPAGE (PAGE_SIZE / sizeof(int)) 73 #define I16PERPAGE (PAGE_SIZE / sizeof(int16_t)) 74 75 /* 76 * Sample rate 77 */ 78 #define SPS 1250000 79 80 /* 81 * We sample one channel (= 16 bits) at 1.25 msps giving 2.5Mbyte/sec, 82 * 100 pages will give us about 1/6 second buffering. 83 */ 84 #define NRING 100 85 86 /* 87 * How many waves are we willing to entertain 88 */ 89 #define NWAVE 25 90 91 struct info { 92 int nring; 93 off_t o_ring; 94 95 int ngri; 96 int ppgri; 97 off_t o_gri; 98 }; 99 100 struct softc { 101 device_t device; 102 void *intrhand; 103 struct resource *r0, *r1, *ri; 104 bus_space_tag_t t0, t1; 105 bus_space_handle_t h0, h1; 106 dev_t dev; 107 off_t mapvir; 108 109 struct proc *procp; 110 111 struct info *info; 112 113 struct wave *wave[NWAVE]; 114 115 int idx; 116 void *ring[NRING]; 117 vm_paddr_t pring[NRING]; 118 int stat[NRING]; 119 120 uint64_t cnt; 121 122 u_char flags[I16PERPAGE]; 123 }; 124 125 static void 126 adlink_wave(struct softc *sc, struct wave *wp, int16_t *sp) 127 { 128 int f, i, k, m, *ip; 129 130 f = 0; 131 for (i = 0; i < I16PERPAGE; ) { 132 k = (sc->cnt - wp->offset + i) % wp->period; 133 if (k >= wp->length) { 134 i += wp->period - k; 135 sp += wp->period - k; 136 continue; 137 } 138 m = k % INTPERPAGE; 139 ip = (int *)(wp->virtual[k / INTPERPAGE]) + m; 140 while (m < INTPERPAGE && i < I16PERPAGE && k < wp->length) { 141 if (sc->flags[i] >= wp->index) 142 *ip += (*sp * 8 - *ip) >> wp->avg; 143 if (wp->flags & 1) 144 sc->flags[i] = wp->index; 145 sp++; 146 ip++; 147 m++; 148 i++; 149 k++; 150 } 151 } 152 } 153 154 static void 155 adlink_tickle(struct softc *sc) 156 { 157 158 wakeup(sc); 159 tsleep(&sc->ring, PUSER | PCATCH, "tickle", 1); 160 } 161 162 static int 163 adlink_new_wave(struct softc *sc, int index, int period, int offset, int length, int avg, int flags) 164 { 165 struct wave *wp; 166 int l, i; 167 void **oldvir, **newvir; 168 169 if (index < 0 || index >= NWAVE) 170 return (EINVAL); 171 wp = sc->wave[index]; 172 if (wp == NULL) { 173 adlink_tickle(sc); 174 wp = malloc(sizeof *wp, M_DEVBUF, M_WAITOK | M_ZERO); 175 } 176 l = howmany(length, INTPERPAGE); 177 /* Setting a high average here to neuter the realtime bits */ 178 wp->avg = 31; 179 if (wp->npages < l) { 180 oldvir = wp->virtual; 181 adlink_tickle(sc); 182 newvir = malloc(sizeof(void *) * l, M_DEVBUF, M_WAITOK | M_ZERO); 183 if (wp->npages > 0) { 184 adlink_tickle(sc); 185 bcopy(oldvir, newvir, wp->npages * sizeof(void *)); 186 } 187 for (i = wp->npages; i < l; i++) { 188 adlink_tickle(sc); 189 newvir[i] = malloc(PAGE_SIZE, M_DEVBUF, M_WAITOK); 190 } 191 wp->virtual = newvir; 192 wp->npages = l; 193 wp->mapvir = sc->mapvir; 194 sc->mapvir += l * PAGE_SIZE; 195 } else { 196 oldvir = NULL; 197 } 198 wp->index = index; 199 wp->period = period; 200 wp->offset = offset; 201 wp->length = length; 202 wp->flags = flags; 203 204 for (i = 0; i < l; i++) { 205 adlink_tickle(sc); 206 bzero(wp->virtual[i], PAGE_SIZE); 207 } 208 wp->avg = avg; 209 sc->wave[index] = wp; 210 printf("Wave[%d] {period %d, offset %d, length %d, avg %d, flags %x}\n", 211 wp->index, wp->period, wp->offset, wp->length, wp->avg, wp->flags); 212 free(oldvir, M_DEVBUF); 213 return (0); 214 } 215 216 static void 217 adlink_loran(void *arg) 218 { 219 struct softc *sc; 220 int idx, i; 221 222 sc = arg; 223 idx = 0; 224 for (;;) { 225 while (sc->stat[idx] == 0) 226 msleep(sc, NULL, PRIBIO, "loran", 1); 227 memset(sc->flags, NWAVE, sizeof sc->flags); 228 for (i = 0; i < NWAVE; i++) { 229 if (sc->wave[i] != NULL) 230 adlink_wave(sc, sc->wave[i], sc->ring[idx]); 231 } 232 sc->cnt += I16PERPAGE; 233 sc->stat[idx] = 0; 234 idx++; 235 idx %= NRING; 236 } 237 kthread_exit(0); 238 } 239 240 static int 241 adlink_open(dev_t dev, int oflags, int devtype, struct thread *td) 242 { 243 static int once; 244 struct softc *sc; 245 int i, error; 246 uint32_t u; 247 248 if (once) 249 return (0); 250 once = 1; 251 252 sc = dev->si_drv1; 253 sc->info = malloc(PAGE_SIZE, M_DEVBUF, M_ZERO | M_WAITOK); 254 sc->info->nring = NRING; 255 256 sc->info->o_ring = PAGE_SIZE; 257 for (i = 0; i < NRING; i++) { 258 sc->ring[i] = malloc(PAGE_SIZE, M_DEVBUF, M_ZERO | M_WAITOK); 259 sc->pring[i] = vtophys(sc->ring[i]); 260 } 261 262 error = adlink_new_wave(sc, NWAVE - 1, SPS, 0, SPS, 7, 0); 263 if (error) 264 return (error); 265 266 error = kthread_create(adlink_loran, sc, &sc->procp, 267 0, 0, "adlink%d", device_get_unit(sc->device)); 268 if (error) 269 return (error); 270 271 /* Enable interrupts on write complete */ 272 bus_space_write_4(sc->t0, sc->h0, 0x38, 0x00004000); 273 274 /* Sample CH0 only */ 275 bus_space_write_4(sc->t1, sc->h1, 0x00, 1); 276 277 /* Divide clock by four */ 278 bus_space_write_4(sc->t1, sc->h1, 0x04, 4); 279 280 /* Software trigger mode: software */ 281 bus_space_write_4(sc->t1, sc->h1, 0x08, 0); 282 283 /* Trigger level zero */ 284 bus_space_write_4(sc->t1, sc->h1, 0x0c, 0); 285 286 /* Trigger source CH0 (not used) */ 287 bus_space_write_4(sc->t1, sc->h1, 0x10, 0); 288 289 /* Fifo control/status: flush */ 290 bus_space_write_4(sc->t1, sc->h1, 0x18, 3); 291 292 /* Clock source: external sine */ 293 bus_space_write_4(sc->t1, sc->h1, 0x20, 2); 294 295 /* Set up Write DMA */ 296 bus_space_write_4(sc->t0, sc->h0, 0x24, sc->pring[i]); 297 bus_space_write_4(sc->t0, sc->h0, 0x28, PAGE_SIZE); 298 u = bus_space_read_4(sc->t0, sc->h0, 0x3c); 299 bus_space_write_4(sc->t0, sc->h0, 0x3c, u | 0x00000600); 300 301 /* Acquisition Enable Register: go! */ 302 bus_space_write_4(sc->t1, sc->h1, 0x1c, 1); 303 return (0); 304 } 305 306 static int 307 adlink_ioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct thread *td) 308 { 309 struct softc *sc; 310 struct wave *wp; 311 int i, error; 312 313 sc = dev->si_drv1; 314 wp = (struct wave *)data; 315 i = wp->index; 316 if (i < 0 || i >= NWAVE) 317 return (EINVAL); 318 if (cmd == ADLINK_GETWAVE) { 319 if (sc->wave[i] == NULL) 320 return (ENOENT); 321 bcopy(sc->wave[i], wp, sizeof(*wp)); 322 return (0); 323 } 324 if (cmd == ADLINK_SETWAVE) { 325 error = adlink_new_wave(sc, 326 i, 327 wp->period, 328 wp->offset, 329 wp->length, 330 wp->avg, 331 wp->flags); 332 if (error) 333 return (error); 334 bcopy(sc->wave[i], wp, sizeof(*wp)); 335 return (0); 336 } 337 return (ENOIOCTL); 338 } 339 340 static int 341 adlink_mmap(dev_t dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot) 342 { 343 struct softc *sc; 344 struct wave *wp; 345 int i, j; 346 347 sc = dev->si_drv1; 348 if (nprot != VM_PROT_READ) 349 return (-1); 350 for (i = 0; i < NWAVE; i++) { 351 if (sc->wave[i] == NULL) 352 continue; 353 wp = sc->wave[i]; 354 if (offset < wp->mapvir) 355 continue; 356 j = (offset - wp->mapvir) / PAGE_SIZE; 357 if (j >= wp->npages) 358 continue; 359 *paddr = vtophys(wp->virtual[j]); 360 return (0); 361 } 362 return (-1); 363 } 364 365 static void 366 adlink_intr(void *arg) 367 { 368 struct softc *sc; 369 uint32_t u; 370 int i, j; 371 372 sc = arg; 373 u = bus_space_read_4(sc->t0, sc->h0, 0x38); 374 if (!(u & 0x00800000)) 375 return; 376 bus_space_write_4(sc->t0, sc->h0, 0x38, u | 0x003f4000); 377 378 j = sc->idx; 379 sc->stat[j] = 1; 380 i = (j + 1) % NRING; 381 sc->idx = i; 382 u = bus_space_read_4(sc->t1, sc->h1, 0x18); 383 if (u & 1) { 384 printf("adlink FIFO overrun\n"); 385 return; 386 } 387 bus_space_write_4(sc->t0, sc->h0, 0x24, sc->pring[i]); 388 bus_space_write_4(sc->t0, sc->h0, 0x28, PAGE_SIZE); 389 wakeup(sc); 390 if (sc->stat[i]) { 391 printf("adlink page busy\n"); 392 } 393 } 394 395 static struct cdevsw adlink_cdevsw = { 396 .d_open = adlink_open, 397 .d_ioctl = adlink_ioctl, 398 .d_mmap = adlink_mmap, 399 .d_name = "adlink", 400 }; 401 402 static devclass_t adlink_devclass; 403 404 static int 405 adlink_probe(device_t self) 406 { 407 408 if (pci_get_devid(self) != 0x80da10e8) 409 return (ENXIO); 410 device_set_desc(self, "Adlink PCI-9812 4 ch 12 bit 20 msps"); 411 return (0); 412 } 413 414 static int 415 adlink_attach(device_t self) 416 { 417 struct softc *sc; 418 int rid, i; 419 420 sc = device_get_softc(self); 421 bzero(sc, sizeof *sc); 422 sc->device = self; 423 424 /* 425 * This is the PCI mapped registers of the AMCC 9535 "matchmaker" 426 * chip. 427 */ 428 rid = 0x10; 429 sc->r0 = bus_alloc_resource(self, SYS_RES_IOPORT, &rid, 430 0, ~0, 1, RF_ACTIVE); 431 if (sc->r0 == NULL) 432 return(ENODEV); 433 sc->t0 = rman_get_bustag(sc->r0); 434 sc->h0 = rman_get_bushandle(sc->r0); 435 printf("Res0 %x %x\n", sc->t0, sc->h0); 436 437 /* 438 * This is the PCI mapped registers of the ADC hardware, they 439 * are described in the manual which comes with the card. 440 */ 441 rid = 0x14; 442 sc->r1 = bus_alloc_resource(self, SYS_RES_IOPORT, &rid, 443 0, ~0, 1, RF_ACTIVE); 444 if (sc->r1 == NULL) 445 return(ENODEV); 446 sc->t1 = rman_get_bustag(sc->r1); 447 sc->h1 = rman_get_bushandle(sc->r1); 448 printf("Res1 %x %x\n", sc->t1, sc->h1); 449 450 rid = 0x0; 451 sc->ri = bus_alloc_resource(self, SYS_RES_IRQ, &rid, 452 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE); 453 if (sc->ri == NULL) 454 return (ENODEV); 455 456 i = bus_setup_intr(self, sc->ri, INTR_MPSAFE | INTR_TYPE_MISC | INTR_FAST, 457 adlink_intr, sc, &sc->intrhand); 458 if (i) { 459 printf("adlink: Couldn't get FAST intr\n"); 460 i = bus_setup_intr(self, sc->ri, INTR_TYPE_MISC, 461 adlink_intr, sc, &sc->intrhand); 462 } 463 464 if (i) 465 return (ENODEV); 466 467 sc->dev = make_dev(&adlink_cdevsw, device_get_unit(self), 468 UID_ROOT, GID_WHEEL, 0444, "adlink%d", device_get_unit(self)); 469 sc->dev->si_drv1 = sc; 470 471 return (0); 472 } 473 474 static device_method_t adlink_methods[] = { 475 /* Device interface */ 476 DEVMETHOD(device_probe, adlink_probe), 477 DEVMETHOD(device_attach, adlink_attach), 478 DEVMETHOD(device_suspend, bus_generic_suspend), 479 DEVMETHOD(device_resume, bus_generic_resume), 480 DEVMETHOD(device_shutdown, bus_generic_shutdown), 481 {0, 0} 482 }; 483 484 static driver_t adlink_driver = { 485 "adlink", 486 adlink_methods, 487 sizeof(struct softc) 488 }; 489 490 DRIVER_MODULE(adlink, pci, adlink_driver, adlink_devclass, 0, 0); 491 #endif /* _KERNEL */ 492