sound/soc/tegra/tegra30_ahub.c

   1 /*
   2  * tegra30_ahub.c - Tegra30 AHUB driver
   3  *
   4  * Copyright (c) 2011,2012, NVIDIA CORPORATION.  All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/clk.h>
  20 #include <linux/device.h>
  21 #include <linux/io.h>
  22 #include <linux/module.h>
  23 #include <linux/of_platform.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/pm_runtime.h>
  26 #include <linux/regmap.h>
  27 #include <linux/reset.h>
  28 #include <linux/slab.h>
  29 #include <sound/soc.h>
  30 #include "tegra30_ahub.h"
  31
  32 #define DRV_NAME "tegra30-ahub"
  33
  34 static struct tegra30_ahub *ahub;
  35
  36 static inline void tegra30_apbif_write(u32 reg, u32 val)
  37 {
  38         regmap_write(ahub->regmap_apbif, reg, val);
  39 }
  40
  41 static inline u32 tegra30_apbif_read(u32 reg)
  42 {
  43         u32 val;
  44
  45         regmap_read(ahub->regmap_apbif, reg, &val);
  46         return val;
  47 }
  48
  49 static inline void tegra30_audio_write(u32 reg, u32 val)
  50 {
  51         regmap_write(ahub->regmap_ahub, reg, val);
  52 }
  53
  54 static int tegra30_ahub_runtime_suspend(struct device *dev)
  55 {
  56         regcache_cache_only(ahub->regmap_apbif, true);
  57         regcache_cache_only(ahub->regmap_ahub, true);
  58
  59         clk_disable_unprepare(ahub->clk_apbif);
  60         clk_disable_unprepare(ahub->clk_d_audio);
  61
  62         return 0;
  63 }
  64
  65 /*
  66  * clk_apbif isn't required for an I2S<->I2S configuration where no PCM data
  67  * is read from or sent to memory. However, that's not something the rest of
  68  * the driver supports right now, so we'll just treat the two clocks as one
  69  * for now.
  70  *
  71  * These functions should not be a plain ref-count. Instead, each active stream
  72  * contributes some requirement to the minimum clock rate, so starting or
  73  * stopping streams should dynamically adjust the clock as required.  However,
  74  * this is not yet implemented.
  75  */
  76 static int tegra30_ahub_runtime_resume(struct device *dev)
  77 {
  78         int ret;
  79
  80         ret = clk_prepare_enable(ahub->clk_d_audio);
  81         if (ret) {
  82                 dev_err(dev, "clk_enable d_audio failed: %d\n", ret);
  83                 return ret;
  84         }
  85         ret = clk_prepare_enable(ahub->clk_apbif);
  86         if (ret) {
  87                 dev_err(dev, "clk_enable apbif failed: %d\n", ret);
  88                 clk_disable(ahub->clk_d_audio);
  89                 return ret;
  90         }
  91
  92         regcache_cache_only(ahub->regmap_apbif, false);
  93         regcache_cache_only(ahub->regmap_ahub, false);
  94
  95         return 0;
  96 }
  97
  98 int tegra30_ahub_allocate_rx_fifo(enum tegra30_ahub_rxcif *rxcif,
  99                                   char *dmachan, int dmachan_len,
 100                                   dma_addr_t *fiforeg)
 101 {
 102         int channel;
 103         u32 reg, val;
 104         struct tegra30_ahub_cif_conf cif_conf;
 105
 106         channel = find_first_zero_bit(ahub->rx_usage,
 107                                       TEGRA30_AHUB_CHANNEL_CTRL_COUNT);
 108         if (channel >= TEGRA30_AHUB_CHANNEL_CTRL_COUNT)
 109                 return -EBUSY;
 110
 111         __set_bit(channel, ahub->rx_usage);
 112
 113         *rxcif = TEGRA30_AHUB_RXCIF_APBIF_RX0 + channel;
 114         snprintf(dmachan, dmachan_len, "rx%d", channel);
 115         *fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_RXFIFO +
 116                    (channel * TEGRA30_AHUB_CHANNEL_RXFIFO_STRIDE);
 117
 118         pm_runtime_get_sync(ahub->dev);
 119
 120         reg = TEGRA30_AHUB_CHANNEL_CTRL +
 121               (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 122         val = tegra30_apbif_read(reg);
 123         val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_MASK |
 124                  TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_MASK);
 125         val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_RX_THRESHOLD_SHIFT) |
 126                TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_EN |
 127                TEGRA30_AHUB_CHANNEL_CTRL_RX_PACK_16;
 128         tegra30_apbif_write(reg, val);
 129
 130         cif_conf.threshold = 0;
 131         cif_conf.audio_channels = 2;
 132         cif_conf.client_channels = 2;
 133         cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
 134         cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
 135         cif_conf.expand = 0;
 136         cif_conf.stereo_conv = 0;
 137         cif_conf.replicate = 0;
 138         cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
 139         cif_conf.truncate = 0;
 140         cif_conf.mono_conv = 0;
 141
 142         reg = TEGRA30_AHUB_CIF_RX_CTRL +
 143               (channel * TEGRA30_AHUB_CIF_RX_CTRL_STRIDE);
 144         ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
 145
 146         pm_runtime_put(ahub->dev);
 147
 148         return 0;
 149 }
 150 EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_rx_fifo);
 151
 152 int tegra30_ahub_enable_rx_fifo(enum tegra30_ahub_rxcif rxcif)
 153 {
 154         int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
 155         int reg, val;
 156
 157         pm_runtime_get_sync(ahub->dev);
 158
 159         reg = TEGRA30_AHUB_CHANNEL_CTRL +
 160               (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 161         val = tegra30_apbif_read(reg);
 162         val |= TEGRA30_AHUB_CHANNEL_CTRL_RX_EN;
 163         tegra30_apbif_write(reg, val);
 164
 165         pm_runtime_put(ahub->dev);
 166
 167         return 0;
 168 }
 169 EXPORT_SYMBOL_GPL(tegra30_ahub_enable_rx_fifo);
 170
 171 int tegra30_ahub_disable_rx_fifo(enum tegra30_ahub_rxcif rxcif)
 172 {
 173         int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
 174         int reg, val;
 175
 176         pm_runtime_get_sync(ahub->dev);
 177
 178         reg = TEGRA30_AHUB_CHANNEL_CTRL +
 179               (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 180         val = tegra30_apbif_read(reg);
 181         val &= ~TEGRA30_AHUB_CHANNEL_CTRL_RX_EN;
 182         tegra30_apbif_write(reg, val);
 183
 184         pm_runtime_put(ahub->dev);
 185
 186         return 0;
 187 }
 188 EXPORT_SYMBOL_GPL(tegra30_ahub_disable_rx_fifo);
 189
 190 int tegra30_ahub_free_rx_fifo(enum tegra30_ahub_rxcif rxcif)
 191 {
 192         int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
 193
 194         __clear_bit(channel, ahub->rx_usage);
 195
 196         return 0;
 197 }
 198 EXPORT_SYMBOL_GPL(tegra30_ahub_free_rx_fifo);
 199
 200 int tegra30_ahub_allocate_tx_fifo(enum tegra30_ahub_txcif *txcif,
 201                                   char *dmachan, int dmachan_len,
 202                                   dma_addr_t *fiforeg)
 203 {
 204         int channel;
 205         u32 reg, val;
 206         struct tegra30_ahub_cif_conf cif_conf;
 207
 208         channel = find_first_zero_bit(ahub->tx_usage,
 209                                       TEGRA30_AHUB_CHANNEL_CTRL_COUNT);
 210         if (channel >= TEGRA30_AHUB_CHANNEL_CTRL_COUNT)
 211                 return -EBUSY;
 212
 213         __set_bit(channel, ahub->tx_usage);
 214
 215         *txcif = TEGRA30_AHUB_TXCIF_APBIF_TX0 + channel;
 216         snprintf(dmachan, dmachan_len, "tx%d", channel);
 217         *fiforeg = ahub->apbif_addr + TEGRA30_AHUB_CHANNEL_TXFIFO +
 218                    (channel * TEGRA30_AHUB_CHANNEL_TXFIFO_STRIDE);
 219
 220         pm_runtime_get_sync(ahub->dev);
 221
 222         reg = TEGRA30_AHUB_CHANNEL_CTRL +
 223               (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 224         val = tegra30_apbif_read(reg);
 225         val &= ~(TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_MASK |
 226                  TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_MASK);
 227         val |= (7 << TEGRA30_AHUB_CHANNEL_CTRL_TX_THRESHOLD_SHIFT) |
 228                TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_EN |
 229                TEGRA30_AHUB_CHANNEL_CTRL_TX_PACK_16;
 230         tegra30_apbif_write(reg, val);
 231
 232         cif_conf.threshold = 0;
 233         cif_conf.audio_channels = 2;
 234         cif_conf.client_channels = 2;
 235         cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
 236         cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
 237         cif_conf.expand = 0;
 238         cif_conf.stereo_conv = 0;
 239         cif_conf.replicate = 0;
 240         cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
 241         cif_conf.truncate = 0;
 242         cif_conf.mono_conv = 0;
 243
 244         reg = TEGRA30_AHUB_CIF_TX_CTRL +
 245               (channel * TEGRA30_AHUB_CIF_TX_CTRL_STRIDE);
 246         ahub->soc_data->set_audio_cif(ahub->regmap_apbif, reg, &cif_conf);
 247
 248         pm_runtime_put(ahub->dev);
 249
 250         return 0;
 251 }
 252 EXPORT_SYMBOL_GPL(tegra30_ahub_allocate_tx_fifo);
 253
 254 int tegra30_ahub_enable_tx_fifo(enum tegra30_ahub_txcif txcif)
 255 {
 256         int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
 257         int reg, val;
 258
 259         pm_runtime_get_sync(ahub->dev);
 260
 261         reg = TEGRA30_AHUB_CHANNEL_CTRL +
 262               (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 263         val = tegra30_apbif_read(reg);
 264         val |= TEGRA30_AHUB_CHANNEL_CTRL_TX_EN;
 265         tegra30_apbif_write(reg, val);
 266
 267         pm_runtime_put(ahub->dev);
 268
 269         return 0;
 270 }
 271 EXPORT_SYMBOL_GPL(tegra30_ahub_enable_tx_fifo);
 272
 273 int tegra30_ahub_disable_tx_fifo(enum tegra30_ahub_txcif txcif)
 274 {
 275         int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
 276         int reg, val;
 277
 278         pm_runtime_get_sync(ahub->dev);
 279
 280         reg = TEGRA30_AHUB_CHANNEL_CTRL +
 281               (channel * TEGRA30_AHUB_CHANNEL_CTRL_STRIDE);
 282         val = tegra30_apbif_read(reg);
 283         val &= ~TEGRA30_AHUB_CHANNEL_CTRL_TX_EN;
 284         tegra30_apbif_write(reg, val);
 285
 286         pm_runtime_put(ahub->dev);
 287
 288         return 0;
 289 }
 290 EXPORT_SYMBOL_GPL(tegra30_ahub_disable_tx_fifo);
 291
 292 int tegra30_ahub_free_tx_fifo(enum tegra30_ahub_txcif txcif)
 293 {
 294         int channel = txcif - TEGRA30_AHUB_TXCIF_APBIF_TX0;
 295
 296         __clear_bit(channel, ahub->tx_usage);
 297
 298         return 0;
 299 }
 300 EXPORT_SYMBOL_GPL(tegra30_ahub_free_tx_fifo);
 301
 302 int tegra30_ahub_set_rx_cif_source(enum tegra30_ahub_rxcif rxcif,
 303                                    enum tegra30_ahub_txcif txcif)
 304 {
 305         int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
 306         int reg;
 307
 308         pm_runtime_get_sync(ahub->dev);
 309
 310         reg = TEGRA30_AHUB_AUDIO_RX +
 311               (channel * TEGRA30_AHUB_AUDIO_RX_STRIDE);
 312         tegra30_audio_write(reg, 1 << txcif);
 313
 314         pm_runtime_put(ahub->dev);
 315
 316         return 0;
 317 }
 318 EXPORT_SYMBOL_GPL(tegra30_ahub_set_rx_cif_source);
 319
 320 int tegra30_ahub_unset_rx_cif_source(enum tegra30_ahub_rxcif rxcif)
 321 {
 322         int channel = rxcif - TEGRA30_AHUB_RXCIF_APBIF_RX0;
 323         int reg;
 324
 325         pm_runtime_get_sync(ahub->dev);
 326
 327         reg = TEGRA30_AHUB_AUDIO_RX +
 328               (channel * TEGRA30_AHUB_AUDIO_RX_STRIDE);
 329         tegra30_audio_write(reg, 0);
 330
 331         pm_runtime_put(ahub->dev);
 332
 333         return 0;
 334 }
 335 EXPORT_SYMBOL_GPL(tegra30_ahub_unset_rx_cif_source);
 336
 337 #define MOD_LIST_MASK_TEGRA30   BIT(0)
 338 #define MOD_LIST_MASK_TEGRA114  BIT(1)
 339 #define MOD_LIST_MASK_TEGRA124  BIT(2)
 340
 341 #define MOD_LIST_MASK_TEGRA30_OR_LATER \
 342                 (MOD_LIST_MASK_TEGRA30 | MOD_LIST_MASK_TEGRA114 | \
 343                         MOD_LIST_MASK_TEGRA124)
 344 #define MOD_LIST_MASK_TEGRA114_OR_LATER \
 345                 (MOD_LIST_MASK_TEGRA114 | MOD_LIST_MASK_TEGRA124)
 346
 347 static const struct {
 348         const char *rst_name;
 349         u32 mod_list_mask;
 350 } configlink_mods[] = {
 351         { "i2s0", MOD_LIST_MASK_TEGRA30_OR_LATER },
 352         { "i2s1", MOD_LIST_MASK_TEGRA30_OR_LATER },
 353         { "i2s2", MOD_LIST_MASK_TEGRA30_OR_LATER },
 354         { "i2s3", MOD_LIST_MASK_TEGRA30_OR_LATER },
 355         { "i2s4", MOD_LIST_MASK_TEGRA30_OR_LATER },
 356         { "dam0", MOD_LIST_MASK_TEGRA30_OR_LATER },
 357         { "dam1", MOD_LIST_MASK_TEGRA30_OR_LATER },
 358         { "dam2", MOD_LIST_MASK_TEGRA30_OR_LATER },
 359         { "spdif", MOD_LIST_MASK_TEGRA30_OR_LATER },
 360         { "amx", MOD_LIST_MASK_TEGRA114_OR_LATER },
 361         { "adx", MOD_LIST_MASK_TEGRA114_OR_LATER },
 362         { "amx1", MOD_LIST_MASK_TEGRA124 },
 363         { "adx1", MOD_LIST_MASK_TEGRA124 },
 364         { "afc0", MOD_LIST_MASK_TEGRA124 },
 365         { "afc1", MOD_LIST_MASK_TEGRA124 },
 366         { "afc2", MOD_LIST_MASK_TEGRA124 },
 367         { "afc3", MOD_LIST_MASK_TEGRA124 },
 368         { "afc4", MOD_LIST_MASK_TEGRA124 },
 369         { "afc5", MOD_LIST_MASK_TEGRA124 },
 370 };
 371
 372 #define LAST_REG(name) \
 373         (TEGRA30_AHUB_##name + \
 374          (TEGRA30_AHUB_##name##_STRIDE * TEGRA30_AHUB_##name##_COUNT) - 4)
 375
 376 #define REG_IN_ARRAY(reg, name) \
 377         ((reg >= TEGRA30_AHUB_##name) && \
 378          (reg <= LAST_REG(name) && \
 379          (!((reg - TEGRA30_AHUB_##name) % TEGRA30_AHUB_##name##_STRIDE))))
 380
 381 static bool tegra30_ahub_apbif_wr_rd_reg(struct device *dev, unsigned int reg)
 382 {
 383         switch (reg) {
 384         case TEGRA30_AHUB_CONFIG_LINK_CTRL:
 385         case TEGRA30_AHUB_MISC_CTRL:
 386         case TEGRA30_AHUB_APBDMA_LIVE_STATUS:
 387         case TEGRA30_AHUB_I2S_LIVE_STATUS:
 388         case TEGRA30_AHUB_SPDIF_LIVE_STATUS:
 389         case TEGRA30_AHUB_I2S_INT_MASK:
 390         case TEGRA30_AHUB_DAM_INT_MASK:
 391         case TEGRA30_AHUB_SPDIF_INT_MASK:
 392         case TEGRA30_AHUB_APBIF_INT_MASK:
 393         case TEGRA30_AHUB_I2S_INT_STATUS:
 394         case TEGRA30_AHUB_DAM_INT_STATUS:
 395         case TEGRA30_AHUB_SPDIF_INT_STATUS:
 396         case TEGRA30_AHUB_APBIF_INT_STATUS:
 397         case TEGRA30_AHUB_I2S_INT_SOURCE:
 398         case TEGRA30_AHUB_DAM_INT_SOURCE:
 399         case TEGRA30_AHUB_SPDIF_INT_SOURCE:
 400         case TEGRA30_AHUB_APBIF_INT_SOURCE:
 401         case TEGRA30_AHUB_I2S_INT_SET:
 402         case TEGRA30_AHUB_DAM_INT_SET:
 403         case TEGRA30_AHUB_SPDIF_INT_SET:
 404         case TEGRA30_AHUB_APBIF_INT_SET:
 405                 return true;
 406         default:
 407                 break;
 408         }
 409
 410         if (REG_IN_ARRAY(reg, CHANNEL_CTRL) ||
 411             REG_IN_ARRAY(reg, CHANNEL_CLEAR) ||
 412             REG_IN_ARRAY(reg, CHANNEL_STATUS) ||
 413             REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
 414             REG_IN_ARRAY(reg, CHANNEL_RXFIFO) ||
 415             REG_IN_ARRAY(reg, CIF_TX_CTRL) ||
 416             REG_IN_ARRAY(reg, CIF_RX_CTRL) ||
 417             REG_IN_ARRAY(reg, DAM_LIVE_STATUS))
 418                 return true;
 419
 420         return false;
 421 }
 422
 423 static bool tegra30_ahub_apbif_volatile_reg(struct device *dev,
 424                                             unsigned int reg)
 425 {
 426         switch (reg) {
 427         case TEGRA30_AHUB_CONFIG_LINK_CTRL:
 428         case TEGRA30_AHUB_MISC_CTRL:
 429         case TEGRA30_AHUB_APBDMA_LIVE_STATUS:
 430         case TEGRA30_AHUB_I2S_LIVE_STATUS:
 431         case TEGRA30_AHUB_SPDIF_LIVE_STATUS:
 432         case TEGRA30_AHUB_I2S_INT_STATUS:
 433         case TEGRA30_AHUB_DAM_INT_STATUS:
 434         case TEGRA30_AHUB_SPDIF_INT_STATUS:
 435         case TEGRA30_AHUB_APBIF_INT_STATUS:
 436         case TEGRA30_AHUB_I2S_INT_SET:
 437         case TEGRA30_AHUB_DAM_INT_SET:
 438         case TEGRA30_AHUB_SPDIF_INT_SET:
 439         case TEGRA30_AHUB_APBIF_INT_SET:
 440                 return true;
 441         default:
 442                 break;
 443         }
 444
 445         if (REG_IN_ARRAY(reg, CHANNEL_CLEAR) ||
 446             REG_IN_ARRAY(reg, CHANNEL_STATUS) ||
 447             REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
 448             REG_IN_ARRAY(reg, CHANNEL_RXFIFO) ||
 449             REG_IN_ARRAY(reg, DAM_LIVE_STATUS))
 450                 return true;
 451
 452         return false;
 453 }
 454
 455 static bool tegra30_ahub_apbif_precious_reg(struct device *dev,
 456                                             unsigned int reg)
 457 {
 458         if (REG_IN_ARRAY(reg, CHANNEL_TXFIFO) ||
 459             REG_IN_ARRAY(reg, CHANNEL_RXFIFO))
 460                 return true;
 461
 462         return false;
 463 }
 464
 465 static const struct regmap_config tegra30_ahub_apbif_regmap_config = {
 466         .name = "apbif",
 467         .reg_bits = 32,
 468         .val_bits = 32,
 469         .reg_stride = 4,
 470         .max_register = TEGRA30_AHUB_APBIF_INT_SET,
 471         .writeable_reg = tegra30_ahub_apbif_wr_rd_reg,
 472         .readable_reg = tegra30_ahub_apbif_wr_rd_reg,
 473         .volatile_reg = tegra30_ahub_apbif_volatile_reg,
 474         .precious_reg = tegra30_ahub_apbif_precious_reg,
 475         .cache_type = REGCACHE_FLAT,
 476 };
 477
 478 static bool tegra30_ahub_ahub_wr_rd_reg(struct device *dev, unsigned int reg)
 479 {
 480         if (REG_IN_ARRAY(reg, AUDIO_RX))
 481                 return true;
 482
 483         return false;
 484 }
 485
 486 static const struct regmap_config tegra30_ahub_ahub_regmap_config = {
 487         .name = "ahub",
 488         .reg_bits = 32,
 489         .val_bits = 32,
 490         .reg_stride = 4,
 491         .max_register = LAST_REG(AUDIO_RX),
 492         .writeable_reg = tegra30_ahub_ahub_wr_rd_reg,
 493         .readable_reg = tegra30_ahub_ahub_wr_rd_reg,
 494         .cache_type = REGCACHE_FLAT,
 495 };
 496
 497 static struct tegra30_ahub_soc_data soc_data_tegra30 = {
 498         .mod_list_mask = MOD_LIST_MASK_TEGRA30,
 499         .set_audio_cif = tegra30_ahub_set_cif,
 500 };
 501
 502 static struct tegra30_ahub_soc_data soc_data_tegra114 = {
 503         .mod_list_mask = MOD_LIST_MASK_TEGRA114,
 504         .set_audio_cif = tegra30_ahub_set_cif,
 505 };
 506
 507 static struct tegra30_ahub_soc_data soc_data_tegra124 = {
 508         .mod_list_mask = MOD_LIST_MASK_TEGRA124,
 509         .set_audio_cif = tegra124_ahub_set_cif,
 510 };
 511
 512 static const struct of_device_id tegra30_ahub_of_match[] = {
 513         { .compatible = "nvidia,tegra124-ahub", .data = &soc_data_tegra124 },
 514         { .compatible = "nvidia,tegra114-ahub", .data = &soc_data_tegra114 },
 515         { .compatible = "nvidia,tegra30-ahub",  .data = &soc_data_tegra30 },
 516         {},
 517 };
 518
 519 static int tegra30_ahub_probe(struct platform_device *pdev)
 520 {
 521         const struct of_device_id *match;
 522         const struct tegra30_ahub_soc_data *soc_data;
 523         struct reset_control *rst;
 524         int i;
 525         struct resource *res0, *res1;
 526         void __iomem *regs_apbif, *regs_ahub;
 527         int ret = 0;
 528
 529         if (ahub)
 530                 return -ENODEV;
 531
 532         match = of_match_device(tegra30_ahub_of_match, &pdev->dev);
 533         if (!match)
 534                 return -EINVAL;
 535         soc_data = match->data;
 536
 537         /*
 538          * The AHUB hosts a register bus: the "configlink". For this to
 539          * operate correctly, all devices on this bus must be out of reset.
 540          * Ensure that here.
 541          */
 542         for (i = 0; i < ARRAY_SIZE(configlink_mods); i++) {
 543                 if (!(configlink_mods[i].mod_list_mask &
 544                                         soc_data->mod_list_mask))
 545                         continue;
 546
 547                 rst = reset_control_get(&pdev->dev,
 548                                         configlink_mods[i].rst_name);
 549                 if (IS_ERR(rst)) {
 550                         dev_err(&pdev->dev, "Can't get reset %s\n",
 551                                 configlink_mods[i].rst_name);
 552                         ret = PTR_ERR(rst);
 553                         return ret;
 554                 }
 555
 556                 ret = reset_control_deassert(rst);
 557                 reset_control_put(rst);
 558                 if (ret)
 559                         return ret;
 560         }
 561
 562         ahub = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_ahub),
 563                             GFP_KERNEL);
 564         if (!ahub)
 565                 return -ENOMEM;
 566         dev_set_drvdata(&pdev->dev, ahub);
 567
 568         ahub->soc_data = soc_data;
 569         ahub->dev = &pdev->dev;
 570
 571         ahub->clk_d_audio = devm_clk_get(&pdev->dev, "d_audio");
 572         if (IS_ERR(ahub->clk_d_audio)) {
 573                 dev_err(&pdev->dev, "Can't retrieve ahub d_audio clock\n");
 574                 ret = PTR_ERR(ahub->clk_d_audio);
 575                 return ret;
 576         }
 577
 578         ahub->clk_apbif = devm_clk_get(&pdev->dev, "apbif");
 579         if (IS_ERR(ahub->clk_apbif)) {
 580                 dev_err(&pdev->dev, "Can't retrieve ahub apbif clock\n");
 581                 ret = PTR_ERR(ahub->clk_apbif);
 582                 return ret;
 583         }
 584
 585         res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 586         regs_apbif = devm_ioremap_resource(&pdev->dev, res0);
 587         if (IS_ERR(regs_apbif))
 588                 return PTR_ERR(regs_apbif);
 589
 590         ahub->apbif_addr = res0->start;
 591
 592         ahub->regmap_apbif = devm_regmap_init_mmio(&pdev->dev, regs_apbif,
 593                                         &tegra30_ahub_apbif_regmap_config);
 594         if (IS_ERR(ahub->regmap_apbif)) {
 595                 dev_err(&pdev->dev, "apbif regmap init failed\n");
 596                 ret = PTR_ERR(ahub->regmap_apbif);
 597                 return ret;
 598         }
 599         regcache_cache_only(ahub->regmap_apbif, true);
 600
 601         res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 602         regs_ahub = devm_ioremap_resource(&pdev->dev, res1);
 603         if (IS_ERR(regs_ahub))
 604                 return PTR_ERR(regs_ahub);
 605
 606         ahub->regmap_ahub = devm_regmap_init_mmio(&pdev->dev, regs_ahub,
 607                                         &tegra30_ahub_ahub_regmap_config);
 608         if (IS_ERR(ahub->regmap_ahub)) {
 609                 dev_err(&pdev->dev, "ahub regmap init failed\n");
 610                 ret = PTR_ERR(ahub->regmap_ahub);
 611                 return ret;
 612         }
 613         regcache_cache_only(ahub->regmap_ahub, true);
 614
 615         pm_runtime_enable(&pdev->dev);
 616         if (!pm_runtime_enabled(&pdev->dev)) {
 617                 ret = tegra30_ahub_runtime_resume(&pdev->dev);
 618                 if (ret)
 619                         goto err_pm_disable;
 620         }
 621
 622         of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
 623
 624         return 0;
 625
 626 err_pm_disable:
 627         pm_runtime_disable(&pdev->dev);
 628
 629         return ret;
 630 }
 631
 632 static int tegra30_ahub_remove(struct platform_device *pdev)
 633 {
 634         if (!ahub)
 635                 return -ENODEV;
 636
 637         pm_runtime_disable(&pdev->dev);
 638         if (!pm_runtime_status_suspended(&pdev->dev))
 639                 tegra30_ahub_runtime_suspend(&pdev->dev);
 640
 641         return 0;
 642 }
 643
 644 #ifdef CONFIG_PM_SLEEP
 645 static int tegra30_ahub_suspend(struct device *dev)
 646 {
 647         regcache_mark_dirty(ahub->regmap_ahub);
 648         regcache_mark_dirty(ahub->regmap_apbif);
 649
 650         return 0;
 651 }
 652
 653 static int tegra30_ahub_resume(struct device *dev)
 654 {
 655         int ret;
 656
 657         ret = pm_runtime_get_sync(dev);
 658         if (ret < 0)
 659                 return ret;
 660         ret = regcache_sync(ahub->regmap_ahub);
 661         ret |= regcache_sync(ahub->regmap_apbif);
 662         pm_runtime_put(dev);
 663
 664         return ret;
 665 }
 666 #endif
 667
 668 static const struct dev_pm_ops tegra30_ahub_pm_ops = {
 669         SET_RUNTIME_PM_OPS(tegra30_ahub_runtime_suspend,
 670                            tegra30_ahub_runtime_resume, NULL)
 671         SET_SYSTEM_SLEEP_PM_OPS(tegra30_ahub_suspend, tegra30_ahub_resume)
 672 };
 673
 674 static struct platform_driver tegra30_ahub_driver = {
 675         .probe = tegra30_ahub_probe,
 676         .remove = tegra30_ahub_remove,
 677         .driver = {
 678                 .name = DRV_NAME,
 679                 .of_match_table = tegra30_ahub_of_match,
 680                 .pm = &tegra30_ahub_pm_ops,
 681         },
 682 };
 683 module_platform_driver(tegra30_ahub_driver);
 684
 685 void tegra30_ahub_set_cif(struct regmap *regmap, unsigned int reg,
 686                           struct tegra30_ahub_cif_conf *conf)
 687 {
 688         unsigned int value;
 689
 690         value = (conf->threshold <<
 691                         TEGRA30_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
 692                 ((conf->audio_channels - 1) <<
 693                         TEGRA30_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
 694                 ((conf->client_channels - 1) <<
 695                         TEGRA30_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
 696                 (conf->audio_bits <<
 697                         TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_SHIFT) |
 698                 (conf->client_bits <<
 699                         TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_SHIFT) |
 700                 (conf->expand <<
 701                         TEGRA30_AUDIOCIF_CTRL_EXPAND_SHIFT) |
 702                 (conf->stereo_conv <<
 703                         TEGRA30_AUDIOCIF_CTRL_STEREO_CONV_SHIFT) |
 704                 (conf->replicate <<
 705                         TEGRA30_AUDIOCIF_CTRL_REPLICATE_SHIFT) |
 706                 (conf->direction <<
 707                         TEGRA30_AUDIOCIF_CTRL_DIRECTION_SHIFT) |
 708                 (conf->truncate <<
 709                         TEGRA30_AUDIOCIF_CTRL_TRUNCATE_SHIFT) |
 710                 (conf->mono_conv <<
 711                         TEGRA30_AUDIOCIF_CTRL_MONO_CONV_SHIFT);
 712
 713         regmap_write(regmap, reg, value);
 714 }
 715 EXPORT_SYMBOL_GPL(tegra30_ahub_set_cif);
 716
 717 void tegra124_ahub_set_cif(struct regmap *regmap, unsigned int reg,
 718                            struct tegra30_ahub_cif_conf *conf)
 719 {
 720         unsigned int value;
 721
 722         value = (conf->threshold <<
 723                         TEGRA124_AUDIOCIF_CTRL_FIFO_THRESHOLD_SHIFT) |
 724                 ((conf->audio_channels - 1) <<
 725                         TEGRA124_AUDIOCIF_CTRL_AUDIO_CHANNELS_SHIFT) |
 726                 ((conf->client_channels - 1) <<
 727                         TEGRA124_AUDIOCIF_CTRL_CLIENT_CHANNELS_SHIFT) |
 728                 (conf->audio_bits <<
 729                         TEGRA30_AUDIOCIF_CTRL_AUDIO_BITS_SHIFT) |
 730                 (conf->client_bits <<
 731                         TEGRA30_AUDIOCIF_CTRL_CLIENT_BITS_SHIFT) |
 732                 (conf->expand <<
 733                         TEGRA30_AUDIOCIF_CTRL_EXPAND_SHIFT) |
 734                 (conf->stereo_conv <<
 735                         TEGRA30_AUDIOCIF_CTRL_STEREO_CONV_SHIFT) |
 736                 (conf->replicate <<
 737                         TEGRA30_AUDIOCIF_CTRL_REPLICATE_SHIFT) |
 738                 (conf->direction <<
 739                         TEGRA30_AUDIOCIF_CTRL_DIRECTION_SHIFT) |
 740                 (conf->truncate <<
 741                         TEGRA30_AUDIOCIF_CTRL_TRUNCATE_SHIFT) |
 742                 (conf->mono_conv <<
 743                         TEGRA30_AUDIOCIF_CTRL_MONO_CONV_SHIFT);
 744
 745         regmap_write(regmap, reg, value);
 746 }
 747 EXPORT_SYMBOL_GPL(tegra124_ahub_set_cif);
 748
 749 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 750 MODULE_DESCRIPTION("Tegra30 AHUB driver");
 751 MODULE_LICENSE("GPL v2");
 752 MODULE_ALIAS("platform:" DRV_NAME);
 753 MODULE_DEVICE_TABLE(of, tegra30_ahub_of_match);