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