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