1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Renesas R-Car SSIU support 4 // 5 // Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 7 #include "rsnd.h" 8 9 #define SSIU_NAME "ssiu" 10 11 struct rsnd_ssiu { 12 struct rsnd_mod mod; 13 u32 busif_status[8]; /* for BUSIF0 - BUSIF7 */ 14 unsigned int usrcnt; 15 int id; 16 int id_sub; 17 }; 18 19 /* SSI_MODE */ 20 #define TDM_EXT (1 << 0) 21 #define TDM_SPLIT (1 << 8) 22 23 #define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr) 24 #define rsnd_mod_to_ssiu(_mod) container_of((_mod), struct rsnd_ssiu, mod) 25 #define for_each_rsnd_ssiu(pos, priv, i) \ 26 for (i = 0; \ 27 (i < rsnd_ssiu_nr(priv)) && \ 28 ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i)); \ 29 i++) 30 31 /* 32 * SSI Gen2 Gen3 Gen4 33 * 0 BUSIF0-3 BUSIF0-7 BUSIF0-7 34 * 1 BUSIF0-3 BUSIF0-7 35 * 2 BUSIF0-3 BUSIF0-7 36 * 3 BUSIF0 BUSIF0-7 37 * 4 BUSIF0 BUSIF0-7 38 * 5 BUSIF0 BUSIF0 39 * 6 BUSIF0 BUSIF0 40 * 7 BUSIF0 BUSIF0 41 * 8 BUSIF0 BUSIF0 42 * 9 BUSIF0-3 BUSIF0-7 43 * total 22 52 8 44 */ 45 static const int gen2_id[] = { 0, 4, 8, 12, 13, 14, 15, 16, 17, 18 }; 46 static const int gen3_id[] = { 0, 8, 16, 24, 32, 40, 41, 42, 43, 44 }; 47 static const int gen4_id[] = { 0 }; 48 49 /* enable busif buffer over/under run interrupt. */ 50 #define rsnd_ssiu_busif_err_irq_enable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 1) 51 #define rsnd_ssiu_busif_err_irq_disable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 0) 52 static void rsnd_ssiu_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable) 53 { 54 int id = rsnd_mod_id(mod); 55 int shift, offset; 56 int i; 57 58 switch (id) { 59 case 0: 60 case 1: 61 case 2: 62 case 3: 63 case 4: 64 shift = id; 65 offset = 0; 66 break; 67 case 9: 68 shift = 1; 69 offset = 1; 70 break; 71 default: 72 return; 73 } 74 75 for (i = 0; i < 4; i++) { 76 enum rsnd_reg reg = SSI_SYS_INT_ENABLE((i * 2) + offset); 77 u32 val = 0xf << (shift * 4); 78 u32 sys_int_enable = rsnd_mod_read(mod, reg); 79 80 if (enable) 81 sys_int_enable |= val; 82 else 83 sys_int_enable &= ~val; 84 rsnd_mod_write(mod, reg, sys_int_enable); 85 } 86 } 87 88 bool rsnd_ssiu_busif_err_status_clear(struct rsnd_mod *mod) 89 { 90 bool error = false; 91 int id = rsnd_mod_id(mod); 92 int shift, offset; 93 int i; 94 95 switch (id) { 96 case 0: 97 case 1: 98 case 2: 99 case 3: 100 case 4: 101 shift = id; 102 offset = 0; 103 break; 104 case 9: 105 shift = 1; 106 offset = 1; 107 break; 108 default: 109 goto out; 110 } 111 112 for (i = 0; i < 4; i++) { 113 u32 reg = SSI_SYS_STATUS(i * 2) + offset; 114 u32 status = rsnd_mod_read(mod, reg); 115 u32 val = 0xf << (shift * 4); 116 117 status &= val; 118 if (status) { 119 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 120 struct device *dev = rsnd_priv_to_dev(priv); 121 122 rsnd_print_irq_status(dev, "%s err status : 0x%08x\n", 123 rsnd_mod_name(mod), status); 124 error = true; 125 } 126 rsnd_mod_write(mod, reg, val); 127 } 128 out: 129 return error; 130 } 131 132 static u32 *rsnd_ssiu_get_status(struct rsnd_mod *mod, 133 struct rsnd_dai_stream *io, 134 enum rsnd_mod_type type) 135 { 136 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); 137 int busif = rsnd_mod_id_sub(mod); 138 139 return &ssiu->busif_status[busif]; 140 } 141 142 static int rsnd_ssiu_init(struct rsnd_mod *mod, 143 struct rsnd_dai_stream *io, 144 struct rsnd_priv *priv) 145 { 146 struct rsnd_dai *rdai = rsnd_io_to_rdai(io); 147 u32 ssis = rsnd_ssi_multi_secondaries_runtime(io); 148 int use_busif = rsnd_ssi_use_busif(io); 149 int id = rsnd_mod_id(mod); 150 int is_clk_master = rsnd_rdai_is_clk_master(rdai); 151 u32 val1, val2; 152 153 /* clear status */ 154 rsnd_ssiu_busif_err_status_clear(mod); 155 156 /* Gen4 doesn't have SSI_MODE */ 157 if (rsnd_is_gen4(priv)) 158 goto ssi_mode_setting_end; 159 160 /* 161 * SSI_MODE0 162 */ 163 rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id); 164 165 /* 166 * SSI_MODE1 / SSI_MODE2 167 * 168 * FIXME 169 * sharing/multi with SSI0 are mainly supported 170 */ 171 val1 = rsnd_mod_read(mod, SSI_MODE1); 172 val2 = rsnd_mod_read(mod, SSI_MODE2); 173 if (rsnd_ssi_is_pin_sharing(io)) { 174 175 ssis |= (1 << id); 176 177 } else if (ssis) { 178 /* 179 * Multi SSI 180 * 181 * set synchronized bit here 182 */ 183 184 /* SSI4 is synchronized with SSI3 */ 185 if (ssis & (1 << 4)) 186 val1 |= (1 << 20); 187 /* SSI012 are synchronized */ 188 if (ssis == 0x0006) 189 val1 |= (1 << 4); 190 /* SSI0129 are synchronized */ 191 if (ssis == 0x0206) 192 val2 |= (1 << 4); 193 } 194 195 /* SSI1 is sharing pin with SSI0 */ 196 if (ssis & (1 << 1)) 197 val1 |= is_clk_master ? 0x2 : 0x1; 198 199 /* SSI2 is sharing pin with SSI0 */ 200 if (ssis & (1 << 2)) 201 val1 |= is_clk_master ? 0x2 << 2 : 202 0x1 << 2; 203 /* SSI4 is sharing pin with SSI3 */ 204 if (ssis & (1 << 4)) 205 val1 |= is_clk_master ? 0x2 << 16 : 206 0x1 << 16; 207 /* SSI9 is sharing pin with SSI0 */ 208 if (ssis & (1 << 9)) 209 val2 |= is_clk_master ? 0x2 : 0x1; 210 211 rsnd_mod_bset(mod, SSI_MODE1, 0x0013001f, val1); 212 rsnd_mod_bset(mod, SSI_MODE2, 0x00000017, val2); 213 214 ssi_mode_setting_end: 215 /* 216 * Enable busif buffer over/under run interrupt. 217 * It will be handled from ssi.c 218 * see 219 * __rsnd_ssi_interrupt() 220 */ 221 rsnd_ssiu_busif_err_irq_enable(mod); 222 223 return 0; 224 } 225 226 static int rsnd_ssiu_quit(struct rsnd_mod *mod, 227 struct rsnd_dai_stream *io, 228 struct rsnd_priv *priv) 229 { 230 /* disable busif buffer over/under run interrupt. */ 231 rsnd_ssiu_busif_err_irq_disable(mod); 232 233 return 0; 234 } 235 236 static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = { 237 .name = SSIU_NAME, 238 .init = rsnd_ssiu_init, 239 .quit = rsnd_ssiu_quit, 240 .get_status = rsnd_ssiu_get_status, 241 }; 242 243 static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod, 244 struct rsnd_dai_stream *io, 245 struct rsnd_priv *priv) 246 { 247 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); 248 u32 has_hdmi0 = rsnd_flags_has(io, RSND_STREAM_HDMI0); 249 u32 has_hdmi1 = rsnd_flags_has(io, RSND_STREAM_HDMI1); 250 int ret; 251 u32 mode = 0; 252 253 ret = rsnd_ssiu_init(mod, io, priv); 254 if (ret < 0) 255 return ret; 256 257 ssiu->usrcnt++; 258 259 /* 260 * TDM Extend/Split Mode 261 * see 262 * rsnd_ssi_config_init() 263 */ 264 if (rsnd_runtime_is_tdm(io)) 265 mode = TDM_EXT; 266 else if (rsnd_runtime_is_tdm_split(io)) 267 mode = TDM_SPLIT; 268 269 rsnd_mod_write(mod, SSI_MODE, mode); 270 271 if (rsnd_ssi_use_busif(io)) { 272 int id = rsnd_mod_id(mod); 273 int busif = rsnd_mod_id_sub(mod); 274 enum rsnd_reg adinr_reg, mode_reg, dalign_reg; 275 276 if ((id == 9) && (busif >= 4)) { 277 adinr_reg = SSI9_BUSIF_ADINR(busif); 278 mode_reg = SSI9_BUSIF_MODE(busif); 279 dalign_reg = SSI9_BUSIF_DALIGN(busif); 280 } else { 281 adinr_reg = SSI_BUSIF_ADINR(busif); 282 mode_reg = SSI_BUSIF_MODE(busif); 283 dalign_reg = SSI_BUSIF_DALIGN(busif); 284 } 285 286 rsnd_mod_write(mod, adinr_reg, 287 rsnd_get_adinr_bit(mod, io) | 288 (rsnd_io_is_play(io) ? 289 rsnd_runtime_channel_after_ctu(io) : 290 rsnd_runtime_channel_original(io))); 291 rsnd_mod_write(mod, mode_reg, 292 rsnd_get_busif_shift(io, mod) | 1); 293 rsnd_mod_write(mod, dalign_reg, 294 rsnd_get_dalign(mod, io)); 295 } 296 297 if (has_hdmi0 || has_hdmi1) { 298 enum rsnd_mod_type rsnd_ssi_array[] = { 299 RSND_MOD_SSIM1, 300 RSND_MOD_SSIM2, 301 RSND_MOD_SSIM3, 302 }; 303 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); 304 struct rsnd_mod *pos; 305 u32 val; 306 int i; 307 308 i = rsnd_mod_id(ssi_mod); 309 310 /* output all same SSI as default */ 311 val = i << 16 | 312 i << 20 | 313 i << 24 | 314 i << 28 | 315 i; 316 317 for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) { 318 int shift = (i * 4) + 20; 319 320 val = (val & ~(0xF << shift)) | 321 rsnd_mod_id(pos) << shift; 322 } 323 324 if (has_hdmi0) 325 rsnd_mod_write(mod, HDMI0_SEL, val); 326 if (has_hdmi1) 327 rsnd_mod_write(mod, HDMI1_SEL, val); 328 } 329 330 return 0; 331 } 332 333 static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod, 334 struct rsnd_dai_stream *io, 335 struct rsnd_priv *priv) 336 { 337 int busif = rsnd_mod_id_sub(mod); 338 339 if (!rsnd_ssi_use_busif(io)) 340 return 0; 341 342 rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 1 << (busif * 4)); 343 344 if (rsnd_ssi_multi_secondaries_runtime(io)) 345 rsnd_mod_write(mod, SSI_CONTROL, 0x1); 346 347 return 0; 348 } 349 350 static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod, 351 struct rsnd_dai_stream *io, 352 struct rsnd_priv *priv) 353 { 354 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); 355 int busif = rsnd_mod_id_sub(mod); 356 357 if (!rsnd_ssi_use_busif(io)) 358 return 0; 359 360 rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 0); 361 362 if (--ssiu->usrcnt) 363 return 0; 364 365 if (rsnd_ssi_multi_secondaries_runtime(io)) 366 rsnd_mod_write(mod, SSI_CONTROL, 0); 367 368 return 0; 369 } 370 371 static int rsnd_ssiu_id(struct rsnd_mod *mod) 372 { 373 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); 374 375 /* see rsnd_ssiu_probe() */ 376 return ssiu->id; 377 } 378 379 static int rsnd_ssiu_id_sub(struct rsnd_mod *mod) 380 { 381 struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); 382 383 /* see rsnd_ssiu_probe() */ 384 return ssiu->id_sub; 385 } 386 387 static struct dma_chan *rsnd_ssiu_dma_req(struct rsnd_dai_stream *io, 388 struct rsnd_mod *mod) 389 { 390 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 391 int is_play = rsnd_io_is_play(io); 392 char *name; 393 394 /* 395 * It should use "rcar_sound,ssiu" on DT. 396 * But, we need to keep compatibility for old version. 397 * 398 * If it has "rcar_sound.ssiu", it will be used. 399 * If not, "rcar_sound.ssi" will be used. 400 * see 401 * rsnd_ssi_dma_req() 402 * rsnd_dma_of_path() 403 */ 404 405 name = is_play ? "rx" : "tx"; 406 407 return rsnd_dma_request_channel(rsnd_ssiu_of_node(priv), 408 SSIU_NAME, mod, name); 409 } 410 411 #ifdef CONFIG_DEBUG_FS 412 static void rsnd_ssiu_debug_info(struct seq_file *m, 413 struct rsnd_dai_stream *io, 414 struct rsnd_mod *mod) 415 { 416 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSIU, 417 rsnd_mod_id(mod) * 0x80, 0x80); 418 } 419 #define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info 420 #else 421 #define DEBUG_INFO 422 #endif 423 424 static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = { 425 .name = SSIU_NAME, 426 .dma_req = rsnd_ssiu_dma_req, 427 .init = rsnd_ssiu_init_gen2, 428 .quit = rsnd_ssiu_quit, 429 .start = rsnd_ssiu_start_gen2, 430 .stop = rsnd_ssiu_stop_gen2, 431 .get_status = rsnd_ssiu_get_status, 432 DEBUG_INFO 433 }; 434 435 static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id) 436 { 437 if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv))) 438 id = 0; 439 440 return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id); 441 } 442 443 static void rsnd_parse_connect_ssiu_compatible(struct rsnd_priv *priv, 444 struct rsnd_dai_stream *io) 445 { 446 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); 447 struct rsnd_ssiu *ssiu; 448 int is_dma_mode; 449 int i; 450 451 if (!ssi_mod) 452 return; 453 454 is_dma_mode = rsnd_ssi_is_dma_mode(ssi_mod); 455 456 /* select BUSIF0 */ 457 for_each_rsnd_ssiu(ssiu, priv, i) { 458 struct rsnd_mod *mod = rsnd_mod_get(ssiu); 459 460 if (is_dma_mode && 461 (rsnd_mod_id(ssi_mod) == rsnd_mod_id(mod)) && 462 (rsnd_mod_id_sub(mod) == 0)) { 463 rsnd_dai_connect(mod, io, mod->type); 464 return; 465 } 466 } 467 } 468 469 void rsnd_parse_connect_ssiu(struct rsnd_dai *rdai, 470 struct device_node *playback, 471 struct device_node *capture) 472 { 473 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); 474 struct device *dev = rsnd_priv_to_dev(priv); 475 struct device_node *node = rsnd_ssiu_of_node(priv); 476 struct rsnd_dai_stream *io_p = &rdai->playback; 477 struct rsnd_dai_stream *io_c = &rdai->capture; 478 479 /* use rcar_sound,ssiu if exist */ 480 if (node) { 481 struct device_node *np; 482 int i = 0; 483 484 for_each_child_of_node(node, np) { 485 struct rsnd_mod *mod; 486 487 i = rsnd_node_fixed_index(dev, np, SSIU_NAME, i); 488 if (i < 0) { 489 of_node_put(np); 490 break; 491 } 492 493 mod = rsnd_ssiu_mod_get(priv, i); 494 495 if (np == playback) 496 rsnd_dai_connect(mod, io_p, mod->type); 497 if (np == capture) 498 rsnd_dai_connect(mod, io_c, mod->type); 499 i++; 500 } 501 502 of_node_put(node); 503 } 504 505 /* Keep DT compatibility */ 506 if (!rsnd_io_to_mod_ssiu(io_p)) 507 rsnd_parse_connect_ssiu_compatible(priv, io_p); 508 if (!rsnd_io_to_mod_ssiu(io_c)) 509 rsnd_parse_connect_ssiu_compatible(priv, io_c); 510 } 511 512 int rsnd_ssiu_probe(struct rsnd_priv *priv) 513 { 514 struct device *dev = rsnd_priv_to_dev(priv); 515 struct device_node *node; 516 struct rsnd_ssiu *ssiu; 517 struct rsnd_mod_ops *ops; 518 const int *list = NULL; 519 int i, nr; 520 521 /* 522 * Keep DT compatibility. 523 * if it has "rcar_sound,ssiu", use it. 524 * if not, use "rcar_sound,ssi" 525 * see 526 * rsnd_ssiu_bufsif_to_id() 527 */ 528 node = rsnd_ssiu_of_node(priv); 529 if (node) 530 nr = rsnd_node_count(priv, node, SSIU_NAME); 531 else 532 nr = priv->ssi_nr; 533 534 if (!nr) 535 return -EINVAL; 536 537 ssiu = devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL); 538 if (!ssiu) 539 return -ENOMEM; 540 541 priv->ssiu = ssiu; 542 priv->ssiu_nr = nr; 543 544 if (rsnd_is_gen1(priv)) 545 ops = &rsnd_ssiu_ops_gen1; 546 else 547 ops = &rsnd_ssiu_ops_gen2; 548 549 /* Keep compatibility */ 550 nr = 0; 551 if ((node) && 552 (ops == &rsnd_ssiu_ops_gen2)) { 553 ops->id = rsnd_ssiu_id; 554 ops->id_sub = rsnd_ssiu_id_sub; 555 556 if (rsnd_is_gen2(priv)) { 557 list = gen2_id; 558 nr = ARRAY_SIZE(gen2_id); 559 } else if (rsnd_is_gen3(priv)) { 560 list = gen3_id; 561 nr = ARRAY_SIZE(gen3_id); 562 } else if (rsnd_is_gen4(priv)) { 563 list = gen4_id; 564 nr = ARRAY_SIZE(gen4_id); 565 } else { 566 dev_err(dev, "unknown SSIU\n"); 567 return -ENODEV; 568 } 569 } 570 571 for_each_rsnd_ssiu(ssiu, priv, i) { 572 int ret; 573 574 if (node) { 575 int j; 576 577 /* 578 * see 579 * rsnd_ssiu_get_id() 580 * rsnd_ssiu_get_id_sub() 581 */ 582 for (j = 0; j < nr; j++) { 583 if (list[j] > i) 584 break; 585 ssiu->id = j; 586 ssiu->id_sub = i - list[ssiu->id]; 587 } 588 } else { 589 ssiu->id = i; 590 } 591 592 ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu), 593 ops, NULL, RSND_MOD_SSIU, i); 594 if (ret) 595 return ret; 596 } 597 598 return 0; 599 } 600 601 void rsnd_ssiu_remove(struct rsnd_priv *priv) 602 { 603 struct rsnd_ssiu *ssiu; 604 int i; 605 606 for_each_rsnd_ssiu(ssiu, priv, i) { 607 rsnd_mod_quit(rsnd_mod_get(ssiu)); 608 } 609 } 610