1 /* $NetBSD: pxa2x0_i2s.c,v 1.13 2019/05/08 13:40:14 isaki Exp $ */ 2 /* $OpenBSD: pxa2x0_i2s.c,v 1.7 2006/04/04 11:45:40 pascoe Exp $ */ 3 4 /* 5 * Copyright (c) 2005 Christopher Pascoe <pascoe (at) openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __KERNEL_RCSID(0, "$NetBSD: pxa2x0_i2s.c,v 1.13 2019/05/08 13:40:14 isaki Exp $"); 22 23 #include <sys/param.h> 24 #include <sys/systm.h> 25 #include <sys/device.h> 26 #include <sys/kmem.h> 27 #include <sys/bus.h> 28 29 #include <arm/xscale/pxa2x0reg.h> 30 #include <arm/xscale/pxa2x0var.h> 31 #include <arm/xscale/pxa2x0_gpio.h> 32 #include <arm/xscale/pxa2x0_i2s.h> 33 #include <arm/xscale/pxa2x0_dmac.h> 34 35 struct pxa2x0_i2s_dma { 36 struct pxa2x0_i2s_dma *next; 37 void *addr; 38 size_t size; 39 bus_dmamap_t map; 40 #define I2S_N_SEGS 1 41 bus_dma_segment_t segs[I2S_N_SEGS]; 42 int nsegs; 43 struct dmac_xfer *dx; 44 }; 45 46 static void pxa2x0_i2s_dmac_ointr(struct dmac_xfer *, int); 47 static void pxa2x0_i2s_dmac_iintr(struct dmac_xfer *, int); 48 49 void 50 pxa2x0_i2s_init(struct pxa2x0_i2s_softc *sc) 51 { 52 53 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SACR0, SACR0_RST); 54 delay(100); 55 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SACR0, 56 SACR0_BCKD | SACR0_SET_TFTH(7) | SACR0_SET_RFTH(7)); 57 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SACR1, 0); 58 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SADR, 0); 59 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SADIV, sc->sc_sadiv); 60 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SACR0, 61 SACR0_BCKD | SACR0_SET_TFTH(7) | SACR0_SET_RFTH(7) | SACR0_ENB); 62 } 63 64 int 65 pxa2x0_i2s_attach_sub(struct pxa2x0_i2s_softc *sc) 66 { 67 int rv; 68 69 KASSERT(sc->sc_intr_lock != NULL); 70 71 rv = bus_space_map(sc->sc_iot, PXA2X0_I2S_BASE, PXA2X0_I2S_SIZE, 0, 72 &sc->sc_ioh); 73 if (rv) { 74 sc->sc_size = 0; 75 return 1; 76 } 77 78 sc->sc_dr.ds_addr = PXA2X0_I2S_BASE + I2S_SADR; 79 sc->sc_dr.ds_len = 4; 80 81 sc->sc_sadiv = SADIV_3_058MHz; 82 83 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, sc->sc_size, 84 BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE); 85 86 pxa2x0_i2s_init(sc); 87 88 return 0; 89 } 90 91 void 92 pxa2x0_i2s_open(struct pxa2x0_i2s_softc *sc) 93 { 94 95 if (sc->sc_open++ == 0) { 96 pxa2x0_clkman_config(CKEN_I2S, 1); 97 } 98 } 99 100 void 101 pxa2x0_i2s_close(struct pxa2x0_i2s_softc *sc) 102 { 103 104 if (--sc->sc_open == 0) { 105 pxa2x0_clkman_config(CKEN_I2S, 0); 106 } 107 } 108 109 int 110 pxa2x0_i2s_detach_sub(struct pxa2x0_i2s_softc *sc) 111 { 112 113 if (sc->sc_size > 0) { 114 bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size); 115 sc->sc_size = 0; 116 } 117 pxa2x0_clkman_config(CKEN_I2S, 0); 118 119 return 0; 120 } 121 122 void 123 pxa2x0_i2s_write(struct pxa2x0_i2s_softc *sc, uint32_t data) 124 { 125 126 if (sc->sc_open == 0) 127 return; 128 129 /* Clear intr and underrun bit if set. */ 130 if (bus_space_read_4(sc->sc_iot, sc->sc_ioh, I2S_SASR0) & SASR0_TUR) 131 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SAICR, SAICR_TUR); 132 133 /* Wait for transmit fifo to have space. */ 134 while ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, I2S_SASR0) & SASR0_TNF) 135 == 0) 136 continue; /* nothing */ 137 138 /* Queue data */ 139 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SADR, data); 140 } 141 142 void 143 pxa2x0_i2s_setspeed(struct pxa2x0_i2s_softc *sc, u_int arg) 144 { 145 /* 146 * The available speeds are in the following table. 147 */ 148 static const struct speed_struct { 149 int speed; 150 int div; 151 } speed_table[] = { 152 {8000, SADIV_513_25kHz}, 153 {11025, SADIV_702_75kHz}, 154 {16000, SADIV_1_026MHz}, 155 {22050, SADIV_1_405MHz}, 156 {44100, SADIV_2_836MHz}, 157 {48000, SADIV_3_058MHz}, 158 }; 159 const int n = (int)__arraycount(speed_table); 160 int selected = -1; 161 int i; 162 163 if (arg < speed_table[0].speed) 164 selected = 0; 165 if (arg > speed_table[n - 1].speed) 166 selected = n - 1; 167 168 for (i = 0; selected == -1 && i < n; i++) { 169 if (speed_table[i].speed == arg) 170 selected = i; 171 } 172 KASSERT(selected != -1); 173 174 sc->sc_sadiv = speed_table[selected].div; 175 bus_space_write_4(sc->sc_iot, sc->sc_ioh, I2S_SADIV, sc->sc_sadiv); 176 } 177 178 void * 179 pxa2x0_i2s_allocm(void *hdl, int direction, size_t size) 180 { 181 struct pxa2x0_i2s_softc *sc = hdl; 182 struct pxa2x0_i2s_dma *p; 183 struct dmac_xfer *dx; 184 int error; 185 186 p = kmem_alloc(sizeof(*p), KM_SLEEP); 187 188 dx = pxa2x0_dmac_allocate_xfer(); 189 if (dx == NULL) { 190 goto fail_alloc; 191 } 192 p->dx = dx; 193 194 p->size = size; 195 if ((error = bus_dmamem_alloc(sc->sc_dmat, size, NBPG, 0, p->segs, 196 I2S_N_SEGS, &p->nsegs, BUS_DMA_WAITOK)) != 0) { 197 goto fail_xfer; 198 } 199 200 if ((error = bus_dmamem_map(sc->sc_dmat, p->segs, p->nsegs, size, 201 &p->addr, BUS_DMA_WAITOK | BUS_DMA_COHERENT)) != 0) { 202 goto fail_map; 203 } 204 205 if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0, 206 BUS_DMA_WAITOK, &p->map)) != 0) { 207 goto fail_create; 208 } 209 210 if ((error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, size, NULL, 211 BUS_DMA_WAITOK)) != 0) { 212 goto fail_load; 213 } 214 215 dx->dx_cookie = sc; 216 dx->dx_priority = DMAC_PRIORITY_NORMAL; 217 dx->dx_dev_width = DMAC_DEV_WIDTH_4; 218 dx->dx_burst_size = DMAC_BURST_SIZE_32; 219 220 p->next = sc->sc_dmas; 221 sc->sc_dmas = p; 222 223 return p->addr; 224 225 fail_load: 226 bus_dmamap_destroy(sc->sc_dmat, p->map); 227 fail_create: 228 bus_dmamem_unmap(sc->sc_dmat, p->addr, size); 229 fail_map: 230 bus_dmamem_free(sc->sc_dmat, p->segs, p->nsegs); 231 fail_xfer: 232 pxa2x0_dmac_free_xfer(dx); 233 fail_alloc: 234 kmem_free(p, sizeof(*p)); 235 return NULL; 236 } 237 238 void 239 pxa2x0_i2s_freem(void *hdl, void *ptr, size_t size) 240 { 241 struct pxa2x0_i2s_softc *sc = hdl; 242 struct pxa2x0_i2s_dma **pp, *p; 243 244 for (pp = &sc->sc_dmas; (p = *pp) != NULL; pp = &p->next) { 245 if (p->addr == ptr) { 246 pxa2x0_dmac_abort_xfer(p->dx); 247 pxa2x0_dmac_free_xfer(p->dx); 248 p->segs[0].ds_len = p->size; /* XXX */ 249 bus_dmamap_unload(sc->sc_dmat, p->map); 250 bus_dmamap_destroy(sc->sc_dmat, p->map); 251 bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size); 252 bus_dmamem_free(sc->sc_dmat, p->segs, p->nsegs); 253 254 *pp = p->next; 255 kmem_free(p, sizeof(*p)); 256 return; 257 } 258 } 259 panic("pxa2x0_i2s_freem: trying to free unallocated memory"); 260 } 261 262 int 263 pxa2x0_i2s_round_blocksize(void *hdl, int bs, int mode, 264 const struct audio_params *param) 265 { 266 267 /* Enforce individual DMA block size limit */ 268 if (bs > DCMD_LENGTH_MASK) 269 return (DCMD_LENGTH_MASK & ~0x07); 270 271 return (bs + 0x07) & ~0x07; /* XXX: 64-bit multiples */ 272 } 273 274 size_t 275 pxa2x0_i2s_round_buffersize(void *hdl, int direction, size_t bufsize) 276 { 277 278 return bufsize; 279 } 280 281 int 282 pxa2x0_i2s_halt_output(void *hdl) 283 { 284 struct pxa2x0_i2s_softc *sc = hdl; 285 286 if (sc->sc_txdma) { 287 pxa2x0_dmac_abort_xfer(sc->sc_txdma->dx); 288 sc->sc_txdma = NULL; 289 } 290 291 return 0; 292 } 293 294 int 295 pxa2x0_i2s_halt_input(void *hdl) 296 { 297 struct pxa2x0_i2s_softc *sc = hdl; 298 299 if (sc->sc_rxdma) { 300 pxa2x0_dmac_abort_xfer(sc->sc_rxdma->dx); 301 sc->sc_rxdma = NULL; 302 } 303 304 return 0; 305 } 306 307 int 308 pxa2x0_i2s_start_output(void *hdl, void *block, int bsize, 309 void (*tx_func)(void *), void *tx_arg) 310 { 311 struct pxa2x0_i2s_softc *sc = hdl; 312 struct pxa2x0_i2s_dma *p; 313 struct dmac_xfer *dx; 314 315 if (sc->sc_txdma) 316 return EBUSY; 317 318 /* Find mapping which contains block completely */ 319 for (p = sc->sc_dmas; 320 p != NULL && 321 (((char*)block < (char *)p->addr) || 322 ((char *)block + bsize > (char *)p->addr + p->size)); 323 p = p->next) { 324 continue; /* Nothing */ 325 } 326 if (p == NULL) { 327 aprint_error("pxa2x0_i2s_start_output: " 328 "request with bad start address: %p, size: %d\n", 329 block, bsize); 330 return ENXIO; 331 } 332 sc->sc_txdma = p; 333 334 p->segs[0].ds_addr = p->map->dm_segs[0].ds_addr + 335 ((char *)block - (char *)p->addr); 336 p->segs[0].ds_len = bsize; 337 338 dx = p->dx; 339 dx->dx_done = pxa2x0_i2s_dmac_ointr; 340 dx->dx_peripheral = DMAC_PERIPH_I2STX; 341 dx->dx_flow = DMAC_FLOW_CTRL_DEST; 342 dx->dx_loop_notify = DMAC_DONT_LOOP; 343 dx->dx_desc[DMAC_DESC_SRC].xd_addr_hold = false; 344 dx->dx_desc[DMAC_DESC_SRC].xd_nsegs = p->nsegs; 345 dx->dx_desc[DMAC_DESC_SRC].xd_dma_segs = p->segs; 346 dx->dx_desc[DMAC_DESC_DST].xd_addr_hold = true; 347 dx->dx_desc[DMAC_DESC_DST].xd_nsegs = 1; 348 dx->dx_desc[DMAC_DESC_DST].xd_dma_segs = &sc->sc_dr; 349 350 sc->sc_txfunc = tx_func; 351 sc->sc_txarg = tx_arg; 352 353 /* Start DMA */ 354 return pxa2x0_dmac_start_xfer(dx); 355 } 356 357 int 358 pxa2x0_i2s_start_input(void *hdl, void *block, int bsize, 359 void (*rx_func)(void *), void *rx_arg) 360 { 361 struct pxa2x0_i2s_softc *sc = hdl; 362 struct pxa2x0_i2s_dma *p; 363 struct dmac_xfer *dx; 364 365 if (sc->sc_rxdma) 366 return EBUSY; 367 368 /* Find mapping which contains block completely */ 369 for (p = sc->sc_dmas; 370 p != NULL && 371 (((char*)block < (char *)p->addr) || 372 ((char *)block + bsize > (char *)p->addr + p->size)); 373 p = p->next) { 374 continue; /* Nothing */ 375 } 376 if (p == NULL) { 377 aprint_error("pxa2x0_i2s_start_input: " 378 "request with bad start address: %p, size: %d\n", 379 block, bsize); 380 return ENXIO; 381 } 382 sc->sc_rxdma = p; 383 384 p->segs[0].ds_addr = p->map->dm_segs[0].ds_addr + 385 ((char *)block - (char *)p->addr); 386 p->segs[0].ds_len = bsize; 387 388 dx = p->dx; 389 dx->dx_done = pxa2x0_i2s_dmac_iintr; 390 dx->dx_peripheral = DMAC_PERIPH_I2SRX; 391 dx->dx_flow = DMAC_FLOW_CTRL_SRC; 392 dx->dx_loop_notify = DMAC_DONT_LOOP; 393 dx->dx_desc[DMAC_DESC_SRC].xd_addr_hold = true; 394 dx->dx_desc[DMAC_DESC_SRC].xd_nsegs = 1; 395 dx->dx_desc[DMAC_DESC_SRC].xd_dma_segs = &sc->sc_dr; 396 dx->dx_desc[DMAC_DESC_DST].xd_addr_hold = false; 397 dx->dx_desc[DMAC_DESC_DST].xd_nsegs = p->nsegs; 398 dx->dx_desc[DMAC_DESC_DST].xd_dma_segs = p->segs; 399 400 sc->sc_rxfunc = rx_func; 401 sc->sc_rxarg = rx_arg; 402 403 /* Start DMA */ 404 return pxa2x0_dmac_start_xfer(dx); 405 } 406 407 static void 408 pxa2x0_i2s_dmac_ointr(struct dmac_xfer *dx, int status) 409 { 410 struct pxa2x0_i2s_softc *sc = dx->dx_cookie; 411 412 if (sc->sc_txdma == NULL) { 413 panic("pxa2x_i2s_dmac_ointr: bad TX DMA descriptor!"); 414 } 415 if (sc->sc_txdma->dx != dx) { 416 panic("pxa2x_i2s_dmac_ointr: xfer mismatch!"); 417 } 418 sc->sc_txdma = NULL; 419 420 if (status) { 421 aprint_error("pxa2x0_i2s_dmac_ointr: " 422 "non-zero completion status %d\n", status); 423 } 424 425 mutex_spin_enter(sc->sc_intr_lock); 426 (sc->sc_txfunc)(sc->sc_txarg); 427 mutex_spin_exit(sc->sc_intr_lock); 428 } 429 430 static void 431 pxa2x0_i2s_dmac_iintr(struct dmac_xfer *dx, int status) 432 { 433 struct pxa2x0_i2s_softc *sc = dx->dx_cookie; 434 435 if (sc->sc_rxdma == NULL) { 436 panic("pxa2x_i2s_dmac_iintr: bad RX DMA descriptor!"); 437 } 438 if (sc->sc_rxdma->dx != dx) { 439 panic("pxa2x_i2s_dmac_iintr: xfer mismatch!"); 440 } 441 sc->sc_rxdma = NULL; 442 443 if (status) { 444 aprint_error("pxa2x0_i2s_dmac_iintr: " 445 "non-zero completion status %d\n", status); 446 } 447 448 449 mutex_spin_enter(sc->sc_intr_lock); 450 (sc->sc_rxfunc)(sc->sc_rxarg); 451 mutex_spin_exit(sc->sc_intr_lock); 452 } 453
Indexes created Mon Sep 22 13:09:51 GMT 2025