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1// SPDX-License-Identifier: GPL-2.02//3// Renesas R-Car SSIU support4//5// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>6 7#include "rsnd.h"8 9#define SSIU_NAME "ssiu"10 11struct 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 Gen433 * 0 BUSIF0-3 BUSIF0-7 BUSIF0-734 * 1 BUSIF0-3 BUSIF0-735 * 2 BUSIF0-3 BUSIF0-736 * 3 BUSIF0 BUSIF0-737 * 4 BUSIF0 BUSIF0-738 * 5 BUSIF0 BUSIF039 * 6 BUSIF0 BUSIF040 * 7 BUSIF0 BUSIF041 * 8 BUSIF0 BUSIF042 * 9 BUSIF0-3 BUSIF0-743 * total 22 52 844 */45static const int gen2_id[] = { 0, 4, 8, 12, 13, 14, 15, 16, 17, 18 };46static const int gen3_id[] = { 0, 8, 16, 24, 32, 40, 41, 42, 43, 44 };47static 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)52static 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 else83 sys_int_enable &= ~val;84 rsnd_mod_write(mod, reg, sys_int_enable);85 }86}87 88bool 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 }128out:129 return error;130}131 132static 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 142static 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_MODE0162 */163 rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id);164 165 /*166 * SSI_MODE1 / SSI_MODE2167 *168 * FIXME169 * sharing/multi with SSI0 are mainly supported170 */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 SSI180 *181 * set synchronized bit here182 */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 214ssi_mode_setting_end:215 /*216 * Enable busif buffer over/under run interrupt.217 * It will be handled from ssi.c218 * see219 * __rsnd_ssi_interrupt()220 */221 rsnd_ssiu_busif_err_irq_enable(mod);222 223 return 0;224}225 226static 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 236static 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 243static 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 Mode261 * see262 * 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 333static 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 350static 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 371static 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 379static 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 387static 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 * see401 * 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_FS412static 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_BASE_SSIU,417 rsnd_mod_id(mod) * 0x80, 0x80);418}419#define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info420#else421#define DEBUG_INFO422#endif423 424static 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_INFO433};434 435static 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 443static 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 469void 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 512int 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 * see526 * 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 else532 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 else547 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 * see579 * 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 601void 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