vidcaudio.c revision 1.59.4.1
1 /* $NetBSD: vidcaudio.c,v 1.59.4.1 2020/02/29 20:18:19 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Melvin Tang-Richardson 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the RiscBSD team. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 2003 Ben Harris 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. The name of the author may not be used to endorse or promote products 45 * derived from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 /* 60 * audio driver for the RiscPC 8/16 bit sound 61 * 62 * Interfaces with the NetBSD generic audio driver to provide SUN 63 * /dev/audio (partial) compatibility. 64 */ 65 66 #include <sys/param.h> /* proc.h */ 67 68 __KERNEL_RCSID(0, "$NetBSD: vidcaudio.c,v 1.59.4.1 2020/02/29 20:18:19 ad Exp $"); 69 70 #include <sys/audioio.h> 71 #include <sys/conf.h> /* autoconfig functions */ 72 #include <sys/device.h> /* device calls */ 73 #include <sys/errno.h> 74 #include <sys/malloc.h> 75 #include <sys/proc.h> /* device calls */ 76 #include <sys/systm.h> 77 78 #include <uvm/uvm_extern.h> 79 80 #include <dev/audio/audio_if.h> 81 #include <dev/audio/audiobellvar.h> 82 #include <dev/audio/mulaw.h> 83 84 #include <machine/intr.h> 85 #include <machine/machdep.h> 86 87 #include <arm/iomd/vidcaudiovar.h> 88 #include <arm/iomd/iomdreg.h> 89 #include <arm/iomd/iomdvar.h> 90 #include <arm/iomd/vidc.h> 91 #include <arm/mainbus/mainbus.h> 92 93 #include "pckbd.h" 94 #if NPCKBD > 0 95 #include <dev/pckbport/pckbdvar.h> 96 #endif 97 98 extern int *vidc_base; 99 100 #ifdef VIDCAUDIO_DEBUG 101 #define DPRINTF(x) printf x 102 #else 103 #define DPRINTF(x) 104 #endif 105 106 #define WriteWord(a, b) \ 107 *((volatile unsigned int *)(a)) = (b) 108 109 #define ReadWord(a) \ 110 (*((volatile unsigned int *)(a))) 111 112 struct vidcaudio_softc { 113 device_t sc_dev; 114 115 irqhandler_t sc_ih; 116 int sc_dma_intr; 117 118 int sc_is16bit; 119 120 size_t sc_pblksize; 121 vaddr_t sc_poffset; 122 vaddr_t sc_pbufsize; 123 paddr_t *sc_ppages; 124 void (*sc_pintr)(void *); 125 void *sc_parg; 126 int sc_pcountdown; 127 128 kmutex_t sc_lock; 129 kmutex_t sc_intr_lock; 130 }; 131 132 static int vidcaudio_probe(device_t , cfdata_t , void *); 133 static void vidcaudio_attach(device_t , device_t , void *); 134 static void vidcaudio_close(void *); 135 136 static int vidcaudio_intr(void *); 137 static void vidcaudio_rate(int); 138 static void vidcaudio_ctrl(int); 139 static void vidcaudio_stereo(int, int); 140 141 CFATTACH_DECL_NEW(vidcaudio, sizeof(struct vidcaudio_softc), 142 vidcaudio_probe, vidcaudio_attach, NULL, NULL); 143 144 static int vidcaudio_query_format(void *, audio_format_query_t *); 145 static int vidcaudio_set_format(void *, int, 146 const audio_params_t *, const audio_params_t *, 147 audio_filter_reg_t *, audio_filter_reg_t *); 148 static int vidcaudio_round_blocksize(void *, int, int, const audio_params_t *); 149 static int vidcaudio_trigger_output(void *, void *, void *, int, 150 void (*)(void *), void *, const audio_params_t *); 151 static int vidcaudio_halt_output(void *); 152 static int vidcaudio_getdev(void *, struct audio_device *); 153 static int vidcaudio_set_port(void *, mixer_ctrl_t *); 154 static int vidcaudio_get_port(void *, mixer_ctrl_t *); 155 static int vidcaudio_query_devinfo(void *, mixer_devinfo_t *); 156 static int vidcaudio_get_props(void *); 157 static void vidcaudio_get_locks(void *, kmutex_t **, kmutex_t **); 158 159 static struct audio_device vidcaudio_device = { 160 "ARM VIDC", 161 "", 162 "vidcaudio" 163 }; 164 165 static const struct audio_hw_if vidcaudio_hw_if = { 166 .close = vidcaudio_close, 167 .query_format = vidcaudio_query_format, 168 .set_format = vidcaudio_set_format, 169 .round_blocksize = vidcaudio_round_blocksize, 170 .halt_output = vidcaudio_halt_output, 171 .getdev = vidcaudio_getdev, 172 .set_port = vidcaudio_set_port, 173 .get_port = vidcaudio_get_port, 174 .query_devinfo = vidcaudio_query_devinfo, 175 .get_props = vidcaudio_get_props, 176 .trigger_output = vidcaudio_trigger_output, 177 .get_locks = vidcaudio_get_locks, 178 }; 179 180 static const struct audio_format vidcaudio_formats_16bit = { 181 .mode = AUMODE_PLAY, 182 .encoding = AUDIO_ENCODING_SLINEAR_LE, 183 .validbits = 16, 184 .precision = 16, 185 .channels = 2, 186 .channel_mask = AUFMT_STEREO, 187 /* There are more selectable frequencies but these should be enough. */ 188 .frequency_type = 6, 189 .frequency = { 190 19600, /* /9 */ 191 22050, /* /8 */ 192 25200, /* /7 */ 193 29400, /* /6 */ 194 35280, /* /5 */ 195 44100, /* /4 */ 196 }, 197 }; 198 static const struct audio_format vidcaudio_formats_8bit = { 199 .mode = AUMODE_PLAY, 200 .encoding = AUDIO_ENCODING_ULAW, 201 .validbits = 8, 202 .precision = 8, 203 .channels = 2, /* we use stereo always */ 204 .channel_mask = AUFMT_STEREO, 205 /* frequency is preferably an integer. */ 206 .frequency_type = 6, 207 .frequency = { 208 10000, /* 50us */ 209 12500, /* 40us */ 210 20000, /* 25us */ 211 25000, /* 20us */ 212 31250, /* 16us */ 213 50000, /* 10us */ 214 }, 215 }; 216 217 static int 218 vidcaudio_probe(device_t parent, cfdata_t cf, void *aux) 219 { 220 int id; 221 222 id = IOMD_ID; 223 224 /* So far I only know about this IOMD */ 225 switch (id) { 226 case RPC600_IOMD_ID: 227 case ARM7500_IOC_ID: 228 case ARM7500FE_IOC_ID: 229 return 1; 230 default: 231 aprint_error("vidcaudio: Unknown IOMD id=%04x", id); 232 return 0; 233 } 234 } 235 236 237 static void 238 vidcaudio_attach(device_t parent, device_t self, void *aux) 239 { 240 struct vidcaudio_softc *sc = device_private(self); 241 device_t beepdev; 242 243 sc->sc_dev = self; 244 switch (IOMD_ID) { 245 #ifndef EB7500ATX 246 case RPC600_IOMD_ID: 247 sc->sc_is16bit = (cmos_read(0xc4) >> 5) & 1; 248 sc->sc_dma_intr = IRQ_DMASCH0; 249 break; 250 #endif 251 case ARM7500_IOC_ID: 252 case ARM7500FE_IOC_ID: 253 sc->sc_is16bit = true; 254 sc->sc_dma_intr = IRQ_SDMA; 255 break; 256 default: 257 aprint_error(": strange IOMD\n"); 258 return; 259 } 260 261 if (sc->sc_is16bit) 262 aprint_normal(": 16-bit external DAC\n"); 263 else 264 aprint_normal(": 8-bit internal DAC\n"); 265 266 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 267 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO); 268 269 /* Install the irq handler for the DMA interrupt */ 270 sc->sc_ih.ih_func = vidcaudio_intr; 271 sc->sc_ih.ih_arg = sc; 272 sc->sc_ih.ih_level = IPL_AUDIO; 273 sc->sc_ih.ih_name = device_xname(self); 274 275 if (irq_claim(sc->sc_dma_intr, &sc->sc_ih) != 0) { 276 aprint_error("%s: couldn't claim IRQ %d\n", 277 device_xname(self), sc->sc_dma_intr); 278 return; 279 } 280 281 disable_irq(sc->sc_dma_intr); 282 283 beepdev = audio_attach_mi(&vidcaudio_hw_if, sc, self); 284 #if NPCKBD > 0 285 pckbd_hookup_bell(audiobell, beepdev); 286 #endif 287 } 288 289 static void 290 vidcaudio_close(void *addr) 291 { 292 struct vidcaudio_softc *sc; 293 294 DPRINTF(("DEBUG: vidcaudio_close called\n")); 295 sc = addr; 296 /* 297 * We do this here rather than in vidcaudio_halt_output() 298 * because the latter can be called from interrupt context 299 * (audio_pint()->audio_clear()->vidcaudio_halt_output()). 300 */ 301 if (sc->sc_ppages != NULL) { 302 free(sc->sc_ppages, M_DEVBUF); 303 sc->sc_ppages = NULL; 304 } 305 } 306 307 /* 308 * Interface to the generic audio driver 309 */ 310 311 static int 312 vidcaudio_query_format(void *addr, audio_format_query_t *afp) 313 { 314 struct vidcaudio_softc *sc; 315 316 sc = addr; 317 if (sc->sc_is16bit) 318 return audio_query_format(&vidcaudio_formats_16bit, 1, afp); 319 else 320 return audio_query_format(&vidcaudio_formats_8bit, 1, afp); 321 } 322 323 static int 324 vidcaudio_set_format(void *addr, int setmode, 325 const audio_params_t *play, const audio_params_t *rec, 326 audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) 327 { 328 struct vidcaudio_softc *sc; 329 int sample_period, ch; 330 331 sc = addr; 332 if (sc->sc_is16bit) { 333 /* ARM7500ish, 16-bit, two-channel */ 334 sample_period = 705600 / 4 / play->sample_rate; 335 if (sample_period < 3) 336 sample_period = 3; 337 vidcaudio_rate(sample_period - 2); 338 vidcaudio_ctrl(SCR_SERIAL); 339 } else { 340 /* VIDC20ish, u-law, 8-channel */ 341 /* 342 * We always use two hardware channels, because using 343 * one at 8kHz gives a nasty whining sound from the 344 * speaker. 345 */ 346 sample_period = 1000000 / 2 / play->sample_rate; 347 if (sample_period < 3) 348 sample_period = 3; 349 vidcaudio_rate(sample_period - 2); 350 vidcaudio_ctrl(SCR_SDAC | SCR_CLKSEL); 351 for (ch = 0; ch < 8; ch += 2) 352 vidcaudio_stereo(ch, SIR_LEFT_100); 353 for (ch = 1; ch < 8; ch += 2) 354 vidcaudio_stereo(ch, SIR_RIGHT_100); 355 356 pfil->codec = audio_internal_to_mulaw; 357 } 358 return 0; 359 } 360 361 static int 362 vidcaudio_round_blocksize(void *addr, int wantblk, 363 int mode, const audio_params_t *param) 364 { 365 int blk; 366 367 /* 368 * Find the smallest power of two that's larger than the 369 * requested block size, but don't allow < 32 (DMA burst is 16 370 * bytes, and single bursts are tricky) or > PAGE_SIZE (DMA is 371 * confined to a page). 372 */ 373 374 for (blk = 32; blk < PAGE_SIZE; blk <<= 1) 375 if (blk >= wantblk) 376 return blk; 377 return blk; 378 } 379 380 static int 381 vidcaudio_trigger_output(void *addr, void *start, void *end, int blksize, 382 void (*intr)(void *), void *arg, const audio_params_t *params) 383 { 384 struct vidcaudio_softc *sc; 385 size_t npages, i; 386 387 DPRINTF(("vidcaudio_trigger_output %p-%p/0x%x\n", 388 start, end, blksize)); 389 390 sc = addr; 391 KASSERT(blksize == vidcaudio_round_blocksize(addr, blksize, 0, NULL)); 392 KASSERT((vaddr_t)start % blksize == 0); 393 394 sc->sc_pblksize = blksize; 395 sc->sc_pbufsize = (char *)end - (char *)start; 396 npages = sc->sc_pbufsize >> PGSHIFT; 397 if (sc->sc_ppages != NULL) 398 free(sc->sc_ppages, M_DEVBUF); 399 sc->sc_ppages = malloc(npages * sizeof(paddr_t), M_DEVBUF, M_WAITOK); 400 if (sc->sc_ppages == NULL) 401 return ENOMEM; 402 for (i = 0; i < npages; i++) 403 if (!pmap_extract(pmap_kernel(), 404 (vaddr_t)start + i * PAGE_SIZE, &sc->sc_ppages[i])) 405 return EIO; 406 sc->sc_poffset = 0; 407 sc->sc_pintr = intr; 408 sc->sc_parg = arg; 409 410 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 411 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_ENABLE | IOMD_DMACR_QUADWORD); 412 413 /* 414 * Queue up the first two blocks, but don't tell audio code 415 * we're finished with them yet. 416 */ 417 sc->sc_pcountdown = 2; 418 419 enable_irq(sc->sc_dma_intr); 420 421 return 0; 422 } 423 424 static int 425 vidcaudio_halt_output(void *addr) 426 { 427 struct vidcaudio_softc *sc; 428 429 DPRINTF(("vidcaudio_halt_output\n")); 430 sc = addr; 431 disable_irq(sc->sc_dma_intr); 432 IOMD_WRITE_WORD(IOMD_SD0CR, IOMD_DMACR_CLEAR | IOMD_DMACR_QUADWORD); 433 return 0; 434 } 435 436 static int 437 vidcaudio_getdev(void *addr, struct audio_device *retp) 438 { 439 440 *retp = vidcaudio_device; 441 return 0; 442 } 443 444 445 static int 446 vidcaudio_set_port(void *addr, mixer_ctrl_t *cp) 447 { 448 449 return EINVAL; 450 } 451 452 static int 453 vidcaudio_get_port(void *addr, mixer_ctrl_t *cp) 454 { 455 456 return EINVAL; 457 } 458 459 static int 460 vidcaudio_query_devinfo(void *addr, mixer_devinfo_t *dip) 461 { 462 463 return ENXIO; 464 } 465 466 static int 467 vidcaudio_get_props(void *addr) 468 { 469 470 return AUDIO_PROP_PLAYBACK | AUDIO_PROP_CAPTURE; 471 } 472 473 static void 474 vidcaudio_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) 475 { 476 struct vidcaudio_softc *sc = opaque; 477 478 *intr = &sc->sc_intr_lock; 479 *thread = &sc->sc_lock; 480 } 481 482 static void 483 vidcaudio_rate(int rate) 484 { 485 486 WriteWord(vidc_base, VIDC_SFR | rate); 487 } 488 489 static void 490 vidcaudio_ctrl(int ctrl) 491 { 492 493 WriteWord(vidc_base, VIDC_SCR | ctrl); 494 } 495 496 static void 497 vidcaudio_stereo(int channel, int position) 498 { 499 500 channel = channel << 24 | VIDC_SIR0; 501 WriteWord(vidc_base, channel | position); 502 } 503 504 static int 505 vidcaudio_intr(void *arg) 506 { 507 struct vidcaudio_softc *sc; 508 int status; 509 paddr_t pnext, pend; 510 511 sc = arg; 512 mutex_spin_enter(&sc->sc_intr_lock); 513 514 status = IOMD_READ_BYTE(IOMD_SD0ST); 515 DPRINTF(("I[%x]", status)); 516 if ((status & IOMD_DMAST_INT) == 0) { 517 mutex_spin_exit(&sc->sc_intr_lock); 518 return 0; 519 } 520 521 pnext = sc->sc_ppages[sc->sc_poffset >> PGSHIFT] | 522 (sc->sc_poffset & PGOFSET); 523 pend = (pnext + sc->sc_pblksize - 16) & IOMD_DMAEND_OFFSET; 524 525 switch (status & 526 (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB)) { 527 528 case (IOMD_DMAST_INT | IOMD_DMAST_BANKA): 529 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKB): 530 DPRINTF(("B<0x%08lx,0x%03lx>", pnext, pend)); 531 IOMD_WRITE_WORD(IOMD_SD0CURB, pnext); 532 IOMD_WRITE_WORD(IOMD_SD0ENDB, pend); 533 break; 534 535 case (IOMD_DMAST_INT | IOMD_DMAST_BANKB): 536 case (IOMD_DMAST_OVERRUN | IOMD_DMAST_INT | IOMD_DMAST_BANKA): 537 DPRINTF(("A<0x%08lx,0x%03lx>", pnext, pend)); 538 IOMD_WRITE_WORD(IOMD_SD0CURA, pnext); 539 IOMD_WRITE_WORD(IOMD_SD0ENDA, pend); 540 break; 541 } 542 543 sc->sc_poffset += sc->sc_pblksize; 544 if (sc->sc_poffset >= sc->sc_pbufsize) 545 sc->sc_poffset = 0; 546 547 if (sc->sc_pcountdown > 0) 548 sc->sc_pcountdown--; 549 else 550 (*sc->sc_pintr)(sc->sc_parg); 551 552 mutex_spin_exit(&sc->sc_intr_lock); 553 return 1; 554 } 555
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