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