sound/soc/fsl/mpc8610_hpcd.c

   1 /**
   2  * Freescale MPC8610HPCD ALSA SoC Fabric driver
   3  *
   4  * Author: Timur Tabi <timur@freescale.com>
   5  *
   6  * Copyright 2007-2008 Freescale Semiconductor, Inc.  This file is licensed
   7  * under the terms of the GNU General Public License version 2.  This
   8  * program is licensed "as is" without any warranty of any kind, whether
   9  * express or implied.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/of_device.h>
  15 #include <linux/of_platform.h>
  16 #include <sound/soc.h>
  17 #include <asm/immap_86xx.h>
  18
  19 #include "../codecs/cs4270.h"
  20 #include "fsl_dma.h"
  21 #include "fsl_ssi.h"
  22
  23 /**
  24  * mpc8610_hpcd_data: fabric-specific ASoC device data
  25  *
  26  * This structure contains data for a single sound platform device on an
  27  * MPC8610 HPCD.  Some of the data is taken from the device tree.
  28  */
  29 struct mpc8610_hpcd_data {
  30         struct snd_soc_device sound_devdata;
  31         struct snd_soc_dai_link dai;
  32         struct snd_soc_machine machine;
  33         unsigned int dai_format;
  34         unsigned int codec_clk_direction;
  35         unsigned int cpu_clk_direction;
  36         unsigned int clk_frequency;
  37         struct ccsr_guts __iomem *guts;
  38         struct ccsr_ssi __iomem *ssi;
  39         unsigned int ssi_id;            /* 0 = SSI1, 1 = SSI2, etc */
  40         unsigned int ssi_irq;
  41         unsigned int dma_id;            /* 0 = DMA1, 1 = DMA2, etc */
  42         unsigned int dma_irq[2];
  43         struct ccsr_dma_channel __iomem *dma[2];
  44         unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
  45 };
  46
  47 /**
  48  * mpc8610_hpcd_machine_probe: initalize the board
  49  *
  50  * This function is called when platform_device_add() is called.  It is used
  51  * to initialize the board-specific hardware.
  52  *
  53  * Here we program the DMACR and PMUXCR registers.
  54  */
  55 static int mpc8610_hpcd_machine_probe(struct platform_device *sound_device)
  56 {
  57         struct mpc8610_hpcd_data *machine_data =
  58                 sound_device->dev.platform_data;
  59
  60         /* Program the signal routing between the SSI and the DMA */
  61         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
  62                 machine_data->dma_channel_id[0], CCSR_GUTS_DMACR_DEV_SSI);
  63         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
  64                 machine_data->dma_channel_id[1], CCSR_GUTS_DMACR_DEV_SSI);
  65
  66         guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id,
  67                 machine_data->dma_channel_id[0], 0);
  68         guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id,
  69                 machine_data->dma_channel_id[1], 0);
  70
  71         guts_set_pmuxcr_dma(machine_data->guts, 1, 0, 0);
  72         guts_set_pmuxcr_dma(machine_data->guts, 1, 3, 0);
  73         guts_set_pmuxcr_dma(machine_data->guts, 0, 3, 0);
  74
  75         switch (machine_data->ssi_id) {
  76         case 0:
  77                 clrsetbits_be32(&machine_data->guts->pmuxcr,
  78                         CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
  79                 break;
  80         case 1:
  81                 clrsetbits_be32(&machine_data->guts->pmuxcr,
  82                         CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
  83                 break;
  84         }
  85
  86         return 0;
  87 }
  88
  89 /**
  90  * mpc8610_hpcd_startup: program the board with various hardware parameters
  91  *
  92  * This function takes board-specific information, like clock frequencies
  93  * and serial data formats, and passes that information to the codec and
  94  * transport drivers.
  95  */
  96 static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
  97 {
  98         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  99         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
 100         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 101         struct mpc8610_hpcd_data *machine_data =
 102                 rtd->socdev->dev->platform_data;
 103         int ret = 0;
 104
 105         /* Tell the CPU driver what the serial protocol is. */
 106         ret = snd_soc_dai_set_fmt(cpu_dai, machine_data->dai_format);
 107         if (ret < 0) {
 108                 dev_err(substream->pcm->card->dev,
 109                         "could not set CPU driver audio format\n");
 110                 return ret;
 111         }
 112
 113         /* Tell the codec driver what the serial protocol is. */
 114         ret = snd_soc_dai_set_fmt(codec_dai, machine_data->dai_format);
 115         if (ret < 0) {
 116                 dev_err(substream->pcm->card->dev,
 117                         "could not set codec driver audio format\n");
 118                 return ret;
 119         }
 120
 121         /*
 122          * Tell the CPU driver what the clock frequency is, and whether it's a
 123          * slave or master.
 124          */
 125         ret = snd_soc_dai_set_sysclk(cpu_dai, 0,
 126                                         machine_data->clk_frequency,
 127                                         machine_data->cpu_clk_direction);
 128         if (ret < 0) {
 129                 dev_err(substream->pcm->card->dev,
 130                         "could not set CPU driver clock parameters\n");
 131                 return ret;
 132         }
 133
 134         /*
 135          * Tell the codec driver what the MCLK frequency is, and whether it's
 136          * a slave or master.
 137          */
 138         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 139                                         machine_data->clk_frequency,
 140                                         machine_data->codec_clk_direction);
 141         if (ret < 0) {
 142                 dev_err(substream->pcm->card->dev,
 143                         "could not set codec driver clock params\n");
 144                 return ret;
 145         }
 146
 147         return 0;
 148 }
 149
 150 /**
 151  * mpc8610_hpcd_machine_remove: Remove the sound device
 152  *
 153  * This function is called to remove the sound device for one SSI.  We
 154  * de-program the DMACR and PMUXCR register.
 155  */
 156 int mpc8610_hpcd_machine_remove(struct platform_device *sound_device)
 157 {
 158         struct mpc8610_hpcd_data *machine_data =
 159                 sound_device->dev.platform_data;
 160
 161         /* Restore the signal routing */
 162
 163         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
 164                 machine_data->dma_channel_id[0], 0);
 165         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
 166                 machine_data->dma_channel_id[1], 0);
 167
 168         switch (machine_data->ssi_id) {
 169         case 0:
 170                 clrsetbits_be32(&machine_data->guts->pmuxcr,
 171                         CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
 172                 break;
 173         case 1:
 174                 clrsetbits_be32(&machine_data->guts->pmuxcr,
 175                         CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
 176                 break;
 177         }
 178
 179         return 0;
 180 }
 181
 182 /**
 183  * mpc8610_hpcd_ops: ASoC fabric driver operations
 184  */
 185 static struct snd_soc_ops mpc8610_hpcd_ops = {
 186         .startup = mpc8610_hpcd_startup,
 187 };
 188
 189 /**
 190  * mpc8610_hpcd_machine: ASoC machine data
 191  */
 192 static struct snd_soc_machine mpc8610_hpcd_machine = {
 193         .probe = mpc8610_hpcd_machine_probe,
 194         .remove = mpc8610_hpcd_machine_remove,
 195         .name = "MPC8610 HPCD",
 196         .num_links = 1,
 197 };
 198
 199 /**
 200  * mpc8610_hpcd_probe: OF probe function for the fabric driver
 201  *
 202  * This function gets called when an SSI node is found in the device tree.
 203  *
 204  * Although this is a fabric driver, the SSI node is the "master" node with
 205  * respect to audio hardware connections.  Therefore, we create a new ASoC
 206  * device for each new SSI node that has a codec attached.
 207  *
 208  * FIXME: Currently, we only support one DMA controller, so if there are
 209  * multiple SSI nodes with codecs, only the first will be supported.
 210  *
 211  * FIXME: Even if we did support multiple DMA controllers, we have no
 212  * mechanism for assigning DMA controllers and channels to the individual
 213  * SSI devices.  We also probably aren't compatible with the generic Elo DMA
 214  * device driver.
 215  */
 216 static int mpc8610_hpcd_probe(struct of_device *ofdev,
 217         const struct of_device_id *match)
 218 {
 219         struct device_node *np = ofdev->node;
 220         struct device_node *codec_np = NULL;
 221         struct device_node *guts_np = NULL;
 222         struct device_node *dma_np = NULL;
 223         struct device_node *dma_channel_np = NULL;
 224         const phandle *codec_ph;
 225         const char *sprop;
 226         const u32 *iprop;
 227         struct resource res;
 228         struct platform_device *sound_device = NULL;
 229         struct mpc8610_hpcd_data *machine_data;
 230         struct fsl_ssi_info ssi_info;
 231         struct fsl_dma_info dma_info;
 232         int ret = -ENODEV;
 233
 234         machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
 235         if (!machine_data)
 236                 return -ENOMEM;
 237
 238         memset(&ssi_info, 0, sizeof(ssi_info));
 239         memset(&dma_info, 0, sizeof(dma_info));
 240
 241         ssi_info.dev = &ofdev->dev;
 242
 243         /*
 244          * We are only interested in SSIs with a codec phandle in them, so let's
 245          * make sure this SSI has one.
 246          */
 247         codec_ph = of_get_property(np, "codec-handle", NULL);
 248         if (!codec_ph)
 249                 goto error;
 250
 251         codec_np = of_find_node_by_phandle(*codec_ph);
 252         if (!codec_np)
 253                 goto error;
 254
 255         /* The MPC8610 HPCD only knows about the CS4270 codec, so reject
 256            anything else. */
 257         if (!of_device_is_compatible(codec_np, "cirrus,cs4270"))
 258                 goto error;
 259
 260         /* Get the device ID */
 261         iprop = of_get_property(np, "cell-index", NULL);
 262         if (!iprop) {
 263                 dev_err(&ofdev->dev, "cell-index property not found\n");
 264                 ret = -EINVAL;
 265                 goto error;
 266         }
 267         machine_data->ssi_id = *iprop;
 268         ssi_info.id = *iprop;
 269
 270         /* Get the serial format and clock direction. */
 271         sprop = of_get_property(np, "fsl,mode", NULL);
 272         if (!sprop) {
 273                 dev_err(&ofdev->dev, "fsl,mode property not found\n");
 274                 ret = -EINVAL;
 275                 goto error;
 276         }
 277
 278         if (strcasecmp(sprop, "i2s-slave") == 0) {
 279                 machine_data->dai_format = SND_SOC_DAIFMT_I2S;
 280                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 281                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 282
 283                 /*
 284                  * In i2s-slave mode, the codec has its own clock source, so we
 285                  * need to get the frequency from the device tree and pass it to
 286                  * the codec driver.
 287                  */
 288                 iprop = of_get_property(codec_np, "clock-frequency", NULL);
 289                 if (!iprop || !*iprop) {
 290                         dev_err(&ofdev->dev, "codec bus-frequency property "
 291                                 "is missing or invalid\n");
 292                         ret = -EINVAL;
 293                         goto error;
 294                 }
 295                 machine_data->clk_frequency = *iprop;
 296         } else if (strcasecmp(sprop, "i2s-master") == 0) {
 297                 machine_data->dai_format = SND_SOC_DAIFMT_I2S;
 298                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 299                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 300         } else if (strcasecmp(sprop, "lj-slave") == 0) {
 301                 machine_data->dai_format = SND_SOC_DAIFMT_LEFT_J;
 302                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 303                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 304         } else if (strcasecmp(sprop, "lj-master") == 0) {
 305                 machine_data->dai_format = SND_SOC_DAIFMT_LEFT_J;
 306                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 307                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 308         } else if (strcasecmp(sprop, "rj-slave") == 0) {
 309                 machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J;
 310                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 311                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 312         } else if (strcasecmp(sprop, "rj-master") == 0) {
 313                 machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J;
 314                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 315                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 316         } else if (strcasecmp(sprop, "ac97-slave") == 0) {
 317                 machine_data->dai_format = SND_SOC_DAIFMT_AC97;
 318                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 319                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 320         } else if (strcasecmp(sprop, "ac97-master") == 0) {
 321                 machine_data->dai_format = SND_SOC_DAIFMT_AC97;
 322                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 323                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 324         } else {
 325                 dev_err(&ofdev->dev,
 326                         "unrecognized fsl,mode property \"%s\"\n", sprop);
 327                 ret = -EINVAL;
 328                 goto error;
 329         }
 330
 331         if (!machine_data->clk_frequency) {
 332                 dev_err(&ofdev->dev, "unknown clock frequency\n");
 333                 ret = -EINVAL;
 334                 goto error;
 335         }
 336
 337         /* Read the SSI information from the device tree */
 338         ret = of_address_to_resource(np, 0, &res);
 339         if (ret) {
 340                 dev_err(&ofdev->dev, "could not obtain SSI address\n");
 341                 goto error;
 342         }
 343         if (!res.start) {
 344                 dev_err(&ofdev->dev, "invalid SSI address\n");
 345                 goto error;
 346         }
 347         ssi_info.ssi_phys = res.start;
 348
 349         machine_data->ssi = ioremap(ssi_info.ssi_phys, sizeof(struct ccsr_ssi));
 350         if (!machine_data->ssi) {
 351                 dev_err(&ofdev->dev, "could not map SSI address %x\n",
 352                         ssi_info.ssi_phys);
 353                 ret = -EINVAL;
 354                 goto error;
 355         }
 356         ssi_info.ssi = machine_data->ssi;
 357
 358
 359         /* Get the IRQ of the SSI */
 360         machine_data->ssi_irq = irq_of_parse_and_map(np, 0);
 361         if (!machine_data->ssi_irq) {
 362                 dev_err(&ofdev->dev, "could not get SSI IRQ\n");
 363                 ret = -EINVAL;
 364                 goto error;
 365         }
 366         ssi_info.irq = machine_data->ssi_irq;
 367
 368
 369         /* Map the global utilities registers. */
 370         guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
 371         if (!guts_np) {
 372                 dev_err(&ofdev->dev, "could not obtain address of GUTS\n");
 373                 ret = -EINVAL;
 374                 goto error;
 375         }
 376         machine_data->guts = of_iomap(guts_np, 0);
 377         of_node_put(guts_np);
 378         if (!machine_data->guts) {
 379                 dev_err(&ofdev->dev, "could not map GUTS\n");
 380                 ret = -EINVAL;
 381                 goto error;
 382         }
 383
 384         /* Find the DMA channels to use.  For now, we always use the first DMA
 385            controller. */
 386         for_each_compatible_node(dma_np, NULL, "fsl,mpc8610-dma") {
 387                 iprop = of_get_property(dma_np, "cell-index", NULL);
 388                 if (iprop && (*iprop == 0)) {
 389                         of_node_put(dma_np);
 390                         break;
 391                 }
 392         }
 393         if (!dma_np) {
 394                 dev_err(&ofdev->dev, "could not find DMA node\n");
 395                 ret = -EINVAL;
 396                 goto error;
 397         }
 398         machine_data->dma_id = *iprop;
 399
 400         /*
 401          * Find the DMA channels to use.  For now, we always use DMA channel 0
 402          * for playback, and DMA channel 1 for capture.
 403          */
 404         while ((dma_channel_np = of_get_next_child(dma_np, dma_channel_np))) {
 405                 iprop = of_get_property(dma_channel_np, "cell-index", NULL);
 406                 /* Is it DMA channel 0? */
 407                 if (iprop && (*iprop == 0)) {
 408                         /* dma_channel[0] and dma_irq[0] are for playback */
 409                         dma_info.dma_channel[0] = of_iomap(dma_channel_np, 0);
 410                         dma_info.dma_irq[0] =
 411                                 irq_of_parse_and_map(dma_channel_np, 0);
 412                         machine_data->dma_channel_id[0] = *iprop;
 413                         continue;
 414                 }
 415                 if (iprop && (*iprop == 1)) {
 416                         /* dma_channel[1] and dma_irq[1] are for capture */
 417                         dma_info.dma_channel[1] = of_iomap(dma_channel_np, 0);
 418                         dma_info.dma_irq[1] =
 419                                 irq_of_parse_and_map(dma_channel_np, 0);
 420                         machine_data->dma_channel_id[1] = *iprop;
 421                         continue;
 422                 }
 423         }
 424         if (!dma_info.dma_channel[0] || !dma_info.dma_channel[1] ||
 425             !dma_info.dma_irq[0] || !dma_info.dma_irq[1]) {
 426                 dev_err(&ofdev->dev, "could not find DMA channels\n");
 427                 ret = -EINVAL;
 428                 goto error;
 429         }
 430
 431         dma_info.ssi_stx_phys = ssi_info.ssi_phys +
 432                 offsetof(struct ccsr_ssi, stx0);
 433         dma_info.ssi_srx_phys = ssi_info.ssi_phys +
 434                 offsetof(struct ccsr_ssi, srx0);
 435
 436         /* We have the DMA information, so tell the DMA driver what it is */
 437         if (!fsl_dma_configure(&dma_info)) {
 438                 dev_err(&ofdev->dev, "could not instantiate DMA device\n");
 439                 ret = -EBUSY;
 440                 goto error;
 441         }
 442
 443         /*
 444          * Initialize our DAI data structure.  We should probably get this
 445          * information from the device tree.
 446          */
 447         machine_data->dai.name = "CS4270";
 448         machine_data->dai.stream_name = "CS4270";
 449
 450         machine_data->dai.cpu_dai = fsl_ssi_create_dai(&ssi_info);
 451         machine_data->dai.codec_dai = &cs4270_dai; /* The codec_dai we want */
 452         machine_data->dai.ops = &mpc8610_hpcd_ops;
 453
 454         mpc8610_hpcd_machine.dai_link = &machine_data->dai;
 455
 456         /* Allocate a new audio platform device structure */
 457         sound_device = platform_device_alloc("soc-audio", -1);
 458         if (!sound_device) {
 459                 dev_err(&ofdev->dev, "platform device allocation failed\n");
 460                 ret = -ENOMEM;
 461                 goto error;
 462         }
 463
 464         machine_data->sound_devdata.machine = &mpc8610_hpcd_machine;
 465         machine_data->sound_devdata.codec_dev = &soc_codec_device_cs4270;
 466         machine_data->sound_devdata.platform = &fsl_soc_platform;
 467
 468         sound_device->dev.platform_data = machine_data;
 469
 470
 471         /* Set the platform device and ASoC device to point to each other */
 472         platform_set_drvdata(sound_device, &machine_data->sound_devdata);
 473
 474         machine_data->sound_devdata.dev = &sound_device->dev;
 475
 476
 477         /* Tell ASoC to probe us.  This will call mpc8610_hpcd_machine.probe(),
 478            if it exists. */
 479         ret = platform_device_add(sound_device);
 480
 481         if (ret) {
 482                 dev_err(&ofdev->dev, "platform device add failed\n");
 483                 goto error;
 484         }
 485
 486         dev_set_drvdata(&ofdev->dev, sound_device);
 487
 488         return 0;
 489
 490 error:
 491         of_node_put(codec_np);
 492         of_node_put(guts_np);
 493         of_node_put(dma_np);
 494         of_node_put(dma_channel_np);
 495
 496         if (sound_device)
 497                 platform_device_unregister(sound_device);
 498
 499         if (machine_data->dai.cpu_dai)
 500                 fsl_ssi_destroy_dai(machine_data->dai.cpu_dai);
 501
 502         if (ssi_info.ssi)
 503                 iounmap(ssi_info.ssi);
 504
 505         if (ssi_info.irq)
 506                 irq_dispose_mapping(ssi_info.irq);
 507
 508         if (dma_info.dma_channel[0])
 509                 iounmap(dma_info.dma_channel[0]);
 510
 511         if (dma_info.dma_channel[1])
 512                 iounmap(dma_info.dma_channel[1]);
 513
 514         if (dma_info.dma_irq[0])
 515                 irq_dispose_mapping(dma_info.dma_irq[0]);
 516
 517         if (dma_info.dma_irq[1])
 518                 irq_dispose_mapping(dma_info.dma_irq[1]);
 519
 520         if (machine_data->guts)
 521                 iounmap(machine_data->guts);
 522
 523         kfree(machine_data);
 524
 525         return ret;
 526 }
 527
 528 /**
 529  * mpc8610_hpcd_remove: remove the OF device
 530  *
 531  * This function is called when the OF device is removed.
 532  */
 533 static int mpc8610_hpcd_remove(struct of_device *ofdev)
 534 {
 535         struct platform_device *sound_device = dev_get_drvdata(&ofdev->dev);
 536         struct mpc8610_hpcd_data *machine_data =
 537                 sound_device->dev.platform_data;
 538
 539         platform_device_unregister(sound_device);
 540
 541         if (machine_data->dai.cpu_dai)
 542                 fsl_ssi_destroy_dai(machine_data->dai.cpu_dai);
 543
 544         if (machine_data->ssi)
 545                 iounmap(machine_data->ssi);
 546
 547         if (machine_data->dma[0])
 548                 iounmap(machine_data->dma[0]);
 549
 550         if (machine_data->dma[1])
 551                 iounmap(machine_data->dma[1]);
 552
 553         if (machine_data->dma_irq[0])
 554                 irq_dispose_mapping(machine_data->dma_irq[0]);
 555
 556         if (machine_data->dma_irq[1])
 557                 irq_dispose_mapping(machine_data->dma_irq[1]);
 558
 559         if (machine_data->guts)
 560                 iounmap(machine_data->guts);
 561
 562         kfree(machine_data);
 563         sound_device->dev.platform_data = NULL;
 564
 565         dev_set_drvdata(&ofdev->dev, NULL);
 566
 567         return 0;
 568 }
 569
 570 static struct of_device_id mpc8610_hpcd_match[] = {
 571         {
 572                 .compatible = "fsl,mpc8610-ssi",
 573         },
 574         {}
 575 };
 576 MODULE_DEVICE_TABLE(of, mpc8610_hpcd_match);
 577
 578 static struct of_platform_driver mpc8610_hpcd_of_driver = {
 579         .owner          = THIS_MODULE,
 580         .name           = "mpc8610_hpcd",
 581         .match_table    = mpc8610_hpcd_match,
 582         .probe          = mpc8610_hpcd_probe,
 583         .remove         = mpc8610_hpcd_remove,
 584 };
 585
 586 /**
 587  * mpc8610_hpcd_init: fabric driver initialization.
 588  *
 589  * This function is called when this module is loaded.
 590  */
 591 static int __init mpc8610_hpcd_init(void)
 592 {
 593         int ret;
 594
 595         printk(KERN_INFO "Freescale MPC8610 HPCD ALSA SoC fabric driver\n");
 596
 597         ret = of_register_platform_driver(&mpc8610_hpcd_of_driver);
 598
 599         if (ret)
 600                 printk(KERN_ERR
 601                         "mpc8610-hpcd: failed to register platform driver\n");
 602
 603         return ret;
 604 }
 605
 606 /**
 607  * mpc8610_hpcd_exit: fabric driver exit
 608  *
 609  * This function is called when this driver is unloaded.
 610  */
 611 static void __exit mpc8610_hpcd_exit(void)
 612 {
 613         of_unregister_platform_driver(&mpc8610_hpcd_of_driver);
 614 }
 615
 616 module_init(mpc8610_hpcd_init);
 617 module_exit(mpc8610_hpcd_exit);
 618
 619 MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
 620 MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC fabric driver");
 621 MODULE_LICENSE("GPL");