Kuninori Morimoto | ae5c322 | 2013-07-21 21:36:57 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Renesas R-Car SSIU/SSI support |
| 3 | * |
| 4 | * Copyright (C) 2013 Renesas Solutions Corp. |
| 5 | * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| 6 | * |
| 7 | * Based on fsi.c |
| 8 | * Kuninori Morimoto <morimoto.kuninori@renesas.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | #include <linux/delay.h> |
| 15 | #include "rsnd.h" |
| 16 | #define RSND_SSI_NAME_SIZE 16 |
| 17 | |
| 18 | /* |
| 19 | * SSICR |
| 20 | */ |
| 21 | #define FORCE (1 << 31) /* Fixed */ |
| 22 | #define UIEN (1 << 27) /* Underflow Interrupt Enable */ |
| 23 | #define OIEN (1 << 26) /* Overflow Interrupt Enable */ |
| 24 | #define IIEN (1 << 25) /* Idle Mode Interrupt Enable */ |
| 25 | #define DIEN (1 << 24) /* Data Interrupt Enable */ |
| 26 | |
| 27 | #define DWL_8 (0 << 19) /* Data Word Length */ |
| 28 | #define DWL_16 (1 << 19) /* Data Word Length */ |
| 29 | #define DWL_18 (2 << 19) /* Data Word Length */ |
| 30 | #define DWL_20 (3 << 19) /* Data Word Length */ |
| 31 | #define DWL_22 (4 << 19) /* Data Word Length */ |
| 32 | #define DWL_24 (5 << 19) /* Data Word Length */ |
| 33 | #define DWL_32 (6 << 19) /* Data Word Length */ |
| 34 | |
| 35 | #define SWL_32 (3 << 16) /* R/W System Word Length */ |
| 36 | #define SCKD (1 << 15) /* Serial Bit Clock Direction */ |
| 37 | #define SWSD (1 << 14) /* Serial WS Direction */ |
| 38 | #define SCKP (1 << 13) /* Serial Bit Clock Polarity */ |
| 39 | #define SWSP (1 << 12) /* Serial WS Polarity */ |
| 40 | #define SDTA (1 << 10) /* Serial Data Alignment */ |
| 41 | #define DEL (1 << 8) /* Serial Data Delay */ |
| 42 | #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */ |
| 43 | #define TRMD (1 << 1) /* Transmit/Receive Mode Select */ |
| 44 | #define EN (1 << 0) /* SSI Module Enable */ |
| 45 | |
| 46 | /* |
| 47 | * SSISR |
| 48 | */ |
| 49 | #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */ |
| 50 | #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */ |
| 51 | #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */ |
| 52 | #define DIRQ (1 << 24) /* Data Interrupt Status Flag */ |
| 53 | |
| 54 | struct rsnd_ssi { |
| 55 | struct clk *clk; |
| 56 | struct rsnd_ssi_platform_info *info; /* rcar_snd.h */ |
| 57 | struct rsnd_ssi *parent; |
| 58 | struct rsnd_mod mod; |
| 59 | |
| 60 | struct rsnd_dai *rdai; |
| 61 | struct rsnd_dai_stream *io; |
| 62 | u32 cr_own; |
| 63 | u32 cr_clk; |
| 64 | u32 cr_etc; |
| 65 | int err; |
| 66 | unsigned int usrcnt; |
| 67 | unsigned int rate; |
| 68 | }; |
| 69 | |
| 70 | struct rsnd_ssiu { |
| 71 | u32 ssi_mode0; |
| 72 | u32 ssi_mode1; |
| 73 | |
| 74 | int ssi_nr; |
| 75 | struct rsnd_ssi *ssi; |
| 76 | }; |
| 77 | |
| 78 | #define for_each_rsnd_ssi(pos, priv, i) \ |
| 79 | for (i = 0; \ |
| 80 | (i < rsnd_ssi_nr(priv)) && \ |
| 81 | ((pos) = ((struct rsnd_ssiu *)((priv)->ssiu))->ssi + i); \ |
| 82 | i++) |
| 83 | |
| 84 | #define rsnd_ssi_nr(priv) (((struct rsnd_ssiu *)((priv)->ssiu))->ssi_nr) |
| 85 | #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
| 86 | #define rsnd_ssi_is_pio(ssi) ((ssi)->info->pio_irq > 0) |
| 87 | #define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent) |
| 88 | #define rsnd_rdai_is_clk_master(rdai) ((rdai)->clk_master) |
| 89 | #define rsnd_ssi_mode_flags(p) ((p)->info->flags) |
Kuninori Morimoto | 4b4dab8 | 2013-07-28 18:58:29 -0700 | [diff] [blame^] | 90 | #define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id) |
Kuninori Morimoto | ae5c322 | 2013-07-21 21:36:57 -0700 | [diff] [blame] | 91 | #define rsnd_ssi_to_ssiu(ssi)\ |
| 92 | (((struct rsnd_ssiu *)((ssi) - rsnd_mod_id(&(ssi)->mod))) - 1) |
| 93 | |
| 94 | static void rsnd_ssi_mode_init(struct rsnd_priv *priv, |
| 95 | struct rsnd_ssiu *ssiu) |
| 96 | { |
| 97 | struct rsnd_ssi *ssi; |
| 98 | u32 flags; |
| 99 | u32 val; |
| 100 | int i; |
| 101 | |
| 102 | /* |
| 103 | * SSI_MODE0 |
| 104 | */ |
| 105 | ssiu->ssi_mode0 = 0; |
| 106 | for_each_rsnd_ssi(ssi, priv, i) |
| 107 | ssiu->ssi_mode0 |= (1 << i); |
| 108 | |
| 109 | /* |
| 110 | * SSI_MODE1 |
| 111 | */ |
| 112 | #define ssi_parent_set(p, sync, adg, ext) \ |
| 113 | do { \ |
| 114 | ssi->parent = ssiu->ssi + p; \ |
| 115 | if (flags & RSND_SSI_CLK_FROM_ADG) \ |
| 116 | val = adg; \ |
| 117 | else \ |
| 118 | val = ext; \ |
| 119 | if (flags & RSND_SSI_SYNC) \ |
| 120 | val |= sync; \ |
| 121 | } while (0) |
| 122 | |
| 123 | ssiu->ssi_mode1 = 0; |
| 124 | for_each_rsnd_ssi(ssi, priv, i) { |
| 125 | flags = rsnd_ssi_mode_flags(ssi); |
| 126 | |
| 127 | if (!(flags & RSND_SSI_CLK_PIN_SHARE)) |
| 128 | continue; |
| 129 | |
| 130 | val = 0; |
| 131 | switch (i) { |
| 132 | case 1: |
| 133 | ssi_parent_set(0, (1 << 4), (0x2 << 0), (0x1 << 0)); |
| 134 | break; |
| 135 | case 2: |
| 136 | ssi_parent_set(0, (1 << 4), (0x2 << 2), (0x1 << 2)); |
| 137 | break; |
| 138 | case 4: |
| 139 | ssi_parent_set(3, (1 << 20), (0x2 << 16), (0x1 << 16)); |
| 140 | break; |
| 141 | case 8: |
| 142 | ssi_parent_set(7, 0, 0, 0); |
| 143 | break; |
| 144 | } |
| 145 | |
| 146 | ssiu->ssi_mode1 |= val; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | static void rsnd_ssi_mode_set(struct rsnd_ssi *ssi) |
| 151 | { |
| 152 | struct rsnd_ssiu *ssiu = rsnd_ssi_to_ssiu(ssi); |
| 153 | |
| 154 | rsnd_mod_write(&ssi->mod, SSI_MODE0, ssiu->ssi_mode0); |
| 155 | rsnd_mod_write(&ssi->mod, SSI_MODE1, ssiu->ssi_mode1); |
| 156 | } |
| 157 | |
| 158 | static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
| 159 | u32 bit) |
| 160 | { |
| 161 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| 162 | struct device *dev = rsnd_priv_to_dev(priv); |
| 163 | u32 status; |
| 164 | int i; |
| 165 | |
| 166 | for (i = 0; i < 1024; i++) { |
| 167 | status = rsnd_mod_read(mod, SSISR); |
| 168 | if (status & bit) |
| 169 | return; |
| 170 | |
| 171 | udelay(50); |
| 172 | } |
| 173 | |
| 174 | dev_warn(dev, "status check failed\n"); |
| 175 | } |
| 176 | |
| 177 | static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, |
| 178 | unsigned int rate) |
| 179 | { |
| 180 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); |
| 181 | struct device *dev = rsnd_priv_to_dev(priv); |
| 182 | int i, j, ret; |
| 183 | int adg_clk_div_table[] = { |
| 184 | 1, 6, /* see adg.c */ |
| 185 | }; |
| 186 | int ssi_clk_mul_table[] = { |
| 187 | 1, 2, 4, 8, 16, 6, 12, |
| 188 | }; |
| 189 | unsigned int main_rate; |
| 190 | |
| 191 | /* |
| 192 | * Find best clock, and try to start ADG |
| 193 | */ |
| 194 | for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) { |
| 195 | for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { |
| 196 | |
| 197 | /* |
| 198 | * this driver is assuming that |
| 199 | * system word is 64fs (= 2 x 32bit) |
| 200 | * see rsnd_ssi_start() |
| 201 | */ |
| 202 | main_rate = rate / adg_clk_div_table[i] |
| 203 | * 32 * 2 * ssi_clk_mul_table[j]; |
| 204 | |
| 205 | ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate); |
| 206 | if (0 == ret) { |
| 207 | ssi->rate = rate; |
| 208 | ssi->cr_clk = FORCE | SWL_32 | |
| 209 | SCKD | SWSD | CKDV(j); |
| 210 | |
| 211 | dev_dbg(dev, "ssi%d outputs %u Hz\n", |
| 212 | rsnd_mod_id(&ssi->mod), rate); |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | dev_err(dev, "unsupported clock rate\n"); |
| 220 | return -EIO; |
| 221 | } |
| 222 | |
| 223 | static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi) |
| 224 | { |
| 225 | ssi->rate = 0; |
| 226 | ssi->cr_clk = 0; |
| 227 | rsnd_adg_ssi_clk_stop(&ssi->mod); |
| 228 | } |
| 229 | |
| 230 | static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi, |
| 231 | struct rsnd_dai *rdai, |
| 232 | struct rsnd_dai_stream *io) |
| 233 | { |
| 234 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); |
| 235 | struct device *dev = rsnd_priv_to_dev(priv); |
| 236 | u32 cr; |
| 237 | |
| 238 | if (0 == ssi->usrcnt) { |
| 239 | clk_enable(ssi->clk); |
| 240 | |
| 241 | if (rsnd_rdai_is_clk_master(rdai)) { |
| 242 | struct snd_pcm_runtime *runtime; |
| 243 | |
| 244 | runtime = rsnd_io_to_runtime(io); |
| 245 | |
| 246 | if (rsnd_ssi_clk_from_parent(ssi)) |
| 247 | rsnd_ssi_hw_start(ssi->parent, rdai, io); |
| 248 | else |
| 249 | rsnd_ssi_master_clk_start(ssi, runtime->rate); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | cr = ssi->cr_own | |
| 254 | ssi->cr_clk | |
| 255 | ssi->cr_etc | |
| 256 | EN; |
| 257 | |
| 258 | rsnd_mod_write(&ssi->mod, SSICR, cr); |
| 259 | |
| 260 | ssi->usrcnt++; |
| 261 | |
| 262 | dev_dbg(dev, "ssi%d hw started\n", rsnd_mod_id(&ssi->mod)); |
| 263 | } |
| 264 | |
| 265 | static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi, |
| 266 | struct rsnd_dai *rdai) |
| 267 | { |
| 268 | struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); |
| 269 | struct device *dev = rsnd_priv_to_dev(priv); |
| 270 | u32 cr; |
| 271 | |
| 272 | if (0 == ssi->usrcnt) /* stop might be called without start */ |
| 273 | return; |
| 274 | |
| 275 | ssi->usrcnt--; |
| 276 | |
| 277 | if (0 == ssi->usrcnt) { |
| 278 | /* |
| 279 | * disable all IRQ, |
| 280 | * and, wait all data was sent |
| 281 | */ |
| 282 | cr = ssi->cr_own | |
| 283 | ssi->cr_clk; |
| 284 | |
| 285 | rsnd_mod_write(&ssi->mod, SSICR, cr | EN); |
| 286 | rsnd_ssi_status_check(&ssi->mod, DIRQ); |
| 287 | |
| 288 | /* |
| 289 | * disable SSI, |
| 290 | * and, wait idle state |
| 291 | */ |
| 292 | rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */ |
| 293 | rsnd_ssi_status_check(&ssi->mod, IIRQ); |
| 294 | |
| 295 | if (rsnd_rdai_is_clk_master(rdai)) { |
| 296 | if (rsnd_ssi_clk_from_parent(ssi)) |
| 297 | rsnd_ssi_hw_stop(ssi->parent, rdai); |
| 298 | else |
| 299 | rsnd_ssi_master_clk_stop(ssi); |
| 300 | } |
| 301 | |
| 302 | clk_disable(ssi->clk); |
| 303 | } |
| 304 | |
| 305 | dev_dbg(dev, "ssi%d hw stopped\n", rsnd_mod_id(&ssi->mod)); |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * SSI mod common functions |
| 310 | */ |
| 311 | static int rsnd_ssi_init(struct rsnd_mod *mod, |
| 312 | struct rsnd_dai *rdai, |
| 313 | struct rsnd_dai_stream *io) |
| 314 | { |
| 315 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| 316 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| 317 | struct device *dev = rsnd_priv_to_dev(priv); |
| 318 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
| 319 | u32 cr; |
| 320 | |
| 321 | cr = FORCE; |
| 322 | |
| 323 | /* |
| 324 | * always use 32bit system word for easy clock calculation. |
| 325 | * see also rsnd_ssi_master_clk_enable() |
| 326 | */ |
| 327 | cr |= SWL_32; |
| 328 | |
| 329 | /* |
| 330 | * init clock settings for SSICR |
| 331 | */ |
| 332 | switch (runtime->sample_bits) { |
| 333 | case 16: |
| 334 | cr |= DWL_16; |
| 335 | break; |
| 336 | case 32: |
| 337 | cr |= DWL_24; |
| 338 | break; |
| 339 | default: |
| 340 | return -EIO; |
| 341 | } |
| 342 | |
| 343 | if (rdai->bit_clk_inv) |
| 344 | cr |= SCKP; |
| 345 | if (rdai->frm_clk_inv) |
| 346 | cr |= SWSP; |
| 347 | if (rdai->data_alignment) |
| 348 | cr |= SDTA; |
| 349 | if (rdai->sys_delay) |
| 350 | cr |= DEL; |
| 351 | if (rsnd_dai_is_play(rdai, io)) |
| 352 | cr |= TRMD; |
| 353 | |
| 354 | /* |
| 355 | * set ssi parameter |
| 356 | */ |
| 357 | ssi->rdai = rdai; |
| 358 | ssi->io = io; |
| 359 | ssi->cr_own = cr; |
| 360 | ssi->err = -1; /* ignore 1st error */ |
| 361 | |
| 362 | rsnd_ssi_mode_set(ssi); |
| 363 | |
| 364 | dev_dbg(dev, "%s.%d init\n", rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| 365 | |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | static int rsnd_ssi_quit(struct rsnd_mod *mod, |
| 370 | struct rsnd_dai *rdai, |
| 371 | struct rsnd_dai_stream *io) |
| 372 | { |
| 373 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| 374 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| 375 | struct device *dev = rsnd_priv_to_dev(priv); |
| 376 | |
| 377 | dev_dbg(dev, "%s.%d quit\n", rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| 378 | |
| 379 | if (ssi->err > 0) |
| 380 | dev_warn(dev, "ssi under/over flow err = %d\n", ssi->err); |
| 381 | |
| 382 | ssi->rdai = NULL; |
| 383 | ssi->io = NULL; |
| 384 | ssi->cr_own = 0; |
| 385 | ssi->err = 0; |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) |
| 391 | { |
| 392 | /* under/over flow error */ |
| 393 | if (status & (UIRQ | OIRQ)) { |
| 394 | ssi->err++; |
| 395 | |
| 396 | /* clear error status */ |
| 397 | rsnd_mod_write(&ssi->mod, SSISR, 0); |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * SSI PIO |
| 403 | */ |
| 404 | static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data) |
| 405 | { |
| 406 | struct rsnd_ssi *ssi = data; |
| 407 | struct rsnd_dai_stream *io = ssi->io; |
| 408 | u32 status = rsnd_mod_read(&ssi->mod, SSISR); |
| 409 | irqreturn_t ret = IRQ_NONE; |
| 410 | |
| 411 | if (io && (status & DIRQ)) { |
| 412 | struct rsnd_dai *rdai = ssi->rdai; |
| 413 | struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
| 414 | u32 *buf = (u32 *)(runtime->dma_area + |
| 415 | rsnd_dai_pointer_offset(io, 0)); |
| 416 | |
| 417 | rsnd_ssi_record_error(ssi, status); |
| 418 | |
| 419 | /* |
| 420 | * 8/16/32 data can be assesse to TDR/RDR register |
| 421 | * directly as 32bit data |
| 422 | * see rsnd_ssi_init() |
| 423 | */ |
| 424 | if (rsnd_dai_is_play(rdai, io)) |
| 425 | rsnd_mod_write(&ssi->mod, SSITDR, *buf); |
| 426 | else |
| 427 | *buf = rsnd_mod_read(&ssi->mod, SSIRDR); |
| 428 | |
| 429 | rsnd_dai_pointer_update(io, sizeof(*buf)); |
| 430 | |
| 431 | ret = IRQ_HANDLED; |
| 432 | } |
| 433 | |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | static int rsnd_ssi_pio_start(struct rsnd_mod *mod, |
| 438 | struct rsnd_dai *rdai, |
| 439 | struct rsnd_dai_stream *io) |
| 440 | { |
| 441 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| 442 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| 443 | struct device *dev = rsnd_priv_to_dev(priv); |
| 444 | |
| 445 | /* enable PIO IRQ */ |
| 446 | ssi->cr_etc = UIEN | OIEN | DIEN; |
| 447 | |
| 448 | rsnd_ssi_hw_start(ssi, rdai, io); |
| 449 | |
| 450 | dev_dbg(dev, "%s.%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | static int rsnd_ssi_pio_stop(struct rsnd_mod *mod, |
| 456 | struct rsnd_dai *rdai, |
| 457 | struct rsnd_dai_stream *io) |
| 458 | { |
| 459 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| 460 | struct device *dev = rsnd_priv_to_dev(priv); |
| 461 | struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| 462 | |
| 463 | dev_dbg(dev, "%s.%d stop\n", rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| 464 | |
| 465 | ssi->cr_etc = 0; |
| 466 | |
| 467 | rsnd_ssi_hw_stop(ssi, rdai); |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
| 473 | .name = "ssi (pio)", |
| 474 | .init = rsnd_ssi_init, |
| 475 | .quit = rsnd_ssi_quit, |
| 476 | .start = rsnd_ssi_pio_start, |
| 477 | .stop = rsnd_ssi_pio_stop, |
| 478 | }; |
| 479 | |
| 480 | /* |
| 481 | * Non SSI |
| 482 | */ |
| 483 | static int rsnd_ssi_non(struct rsnd_mod *mod, |
| 484 | struct rsnd_dai *rdai, |
| 485 | struct rsnd_dai_stream *io) |
| 486 | { |
| 487 | struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| 488 | struct device *dev = rsnd_priv_to_dev(priv); |
| 489 | |
| 490 | dev_dbg(dev, "%s\n", __func__); |
| 491 | |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
| 496 | .name = "ssi (non)", |
| 497 | .init = rsnd_ssi_non, |
| 498 | .quit = rsnd_ssi_non, |
| 499 | .start = rsnd_ssi_non, |
| 500 | .stop = rsnd_ssi_non, |
| 501 | }; |
| 502 | |
| 503 | /* |
| 504 | * ssi mod function |
| 505 | */ |
Kuninori Morimoto | 4b4dab8 | 2013-07-28 18:58:29 -0700 | [diff] [blame^] | 506 | struct rsnd_mod *rsnd_ssi_mod_get_frm_dai(struct rsnd_priv *priv, |
| 507 | int dai_id, int is_play) |
| 508 | { |
| 509 | struct rsnd_ssi *ssi; |
| 510 | int i, has_play; |
| 511 | |
| 512 | is_play = !!is_play; |
| 513 | |
| 514 | for_each_rsnd_ssi(ssi, priv, i) { |
| 515 | if (rsnd_ssi_dai_id(ssi) != dai_id) |
| 516 | continue; |
| 517 | |
| 518 | has_play = !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_PLAY); |
| 519 | |
| 520 | if (is_play == has_play) |
| 521 | return &ssi->mod; |
| 522 | } |
| 523 | |
| 524 | return NULL; |
| 525 | } |
| 526 | |
Kuninori Morimoto | ae5c322 | 2013-07-21 21:36:57 -0700 | [diff] [blame] | 527 | struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) |
| 528 | { |
| 529 | BUG_ON(id < 0 || id >= rsnd_ssi_nr(priv)); |
| 530 | |
| 531 | return &(((struct rsnd_ssiu *)(priv->ssiu))->ssi + id)->mod; |
| 532 | } |
| 533 | |
| 534 | int rsnd_ssi_probe(struct platform_device *pdev, |
| 535 | struct rcar_snd_info *info, |
| 536 | struct rsnd_priv *priv) |
| 537 | { |
| 538 | struct rsnd_ssi_platform_info *pinfo; |
| 539 | struct device *dev = rsnd_priv_to_dev(priv); |
| 540 | struct rsnd_mod_ops *ops; |
| 541 | struct clk *clk; |
| 542 | struct rsnd_ssiu *ssiu; |
| 543 | struct rsnd_ssi *ssi; |
| 544 | char name[RSND_SSI_NAME_SIZE]; |
| 545 | int i, nr, ret; |
| 546 | |
| 547 | /* |
| 548 | * init SSI |
| 549 | */ |
| 550 | nr = info->ssi_info_nr; |
| 551 | ssiu = devm_kzalloc(dev, sizeof(*ssiu) + (sizeof(*ssi) * nr), |
| 552 | GFP_KERNEL); |
| 553 | if (!ssiu) { |
| 554 | dev_err(dev, "SSI allocate failed\n"); |
| 555 | return -ENOMEM; |
| 556 | } |
| 557 | |
| 558 | priv->ssiu = ssiu; |
| 559 | ssiu->ssi = (struct rsnd_ssi *)(ssiu + 1); |
| 560 | ssiu->ssi_nr = nr; |
| 561 | |
| 562 | for_each_rsnd_ssi(ssi, priv, i) { |
| 563 | pinfo = &info->ssi_info[i]; |
| 564 | |
| 565 | snprintf(name, RSND_SSI_NAME_SIZE, "ssi.%d", i); |
| 566 | |
| 567 | clk = clk_get(dev, name); |
| 568 | if (IS_ERR(clk)) |
| 569 | return PTR_ERR(clk); |
| 570 | |
| 571 | ssi->info = pinfo; |
| 572 | ssi->clk = clk; |
| 573 | |
| 574 | ops = &rsnd_ssi_non_ops; |
| 575 | |
| 576 | /* |
| 577 | * SSI PIO case |
| 578 | */ |
| 579 | if (rsnd_ssi_is_pio(ssi)) { |
| 580 | ret = devm_request_irq(dev, pinfo->pio_irq, |
| 581 | &rsnd_ssi_pio_interrupt, |
| 582 | IRQF_SHARED, |
| 583 | dev_name(dev), ssi); |
| 584 | if (ret) { |
| 585 | dev_err(dev, "SSI request interrupt failed\n"); |
| 586 | return ret; |
| 587 | } |
| 588 | |
| 589 | ops = &rsnd_ssi_pio_ops; |
| 590 | } |
| 591 | |
| 592 | rsnd_mod_init(priv, &ssi->mod, ops, i); |
| 593 | } |
| 594 | |
| 595 | rsnd_ssi_mode_init(priv, ssiu); |
| 596 | |
| 597 | dev_dbg(dev, "ssi probed\n"); |
| 598 | |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | void rsnd_ssi_remove(struct platform_device *pdev, |
| 603 | struct rsnd_priv *priv) |
| 604 | { |
| 605 | struct rsnd_ssi *ssi; |
| 606 | int i; |
| 607 | |
| 608 | for_each_rsnd_ssi(ssi, priv, i) |
| 609 | clk_put(ssi->clk); |
| 610 | } |