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_card 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         switch (machine_data->ssi_id) {
  72         case 0:
  73                 clrsetbits_be32(&machine_data->guts->pmuxcr,
  74                         CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
  75                 break;
  76         case 1:
  77                 clrsetbits_be32(&machine_data->guts->pmuxcr,
  78                         CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
  79                 break;
  80         }
  81
  82         return 0;
  83 }
  84
  85 /**
  86  * mpc8610_hpcd_startup: program the board with various hardware parameters
  87  *
  88  * This function takes board-specific information, like clock frequencies
  89  * and serial data formats, and passes that information to the codec and
  90  * transport drivers.
  91  */
  92 static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
  93 {
  94         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  95         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  96         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  97         struct mpc8610_hpcd_data *machine_data =
  98                 rtd->socdev->dev->platform_data;
  99         int ret = 0;
 100
 101         /* Tell the CPU driver what the serial protocol is. */
 102         ret = snd_soc_dai_set_fmt(cpu_dai, machine_data->dai_format);
 103         if (ret < 0) {
 104                 dev_err(substream->pcm->card->dev,
 105                         "could not set CPU driver audio format\n");
 106                 return ret;
 107         }
 108
 109         /* Tell the codec driver what the serial protocol is. */
 110         ret = snd_soc_dai_set_fmt(codec_dai, machine_data->dai_format);
 111         if (ret < 0) {
 112                 dev_err(substream->pcm->card->dev,
 113                         "could not set codec driver audio format\n");
 114                 return ret;
 115         }
 116
 117         /*
 118          * Tell the CPU driver what the clock frequency is, and whether it's a
 119          * slave or master.
 120          */
 121         ret = snd_soc_dai_set_sysclk(cpu_dai, 0,
 122                                         machine_data->clk_frequency,
 123                                         machine_data->cpu_clk_direction);
 124         if (ret < 0) {
 125                 dev_err(substream->pcm->card->dev,
 126                         "could not set CPU driver clock parameters\n");
 127                 return ret;
 128         }
 129
 130         /*
 131          * Tell the codec driver what the MCLK frequency is, and whether it's
 132          * a slave or master.
 133          */
 134         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 135                                         machine_data->clk_frequency,
 136                                         machine_data->codec_clk_direction);
 137         if (ret < 0) {
 138                 dev_err(substream->pcm->card->dev,
 139                         "could not set codec driver clock params\n");
 140                 return ret;
 141         }
 142
 143         return 0;
 144 }
 145
 146 /**
 147  * mpc8610_hpcd_machine_remove: Remove the sound device
 148  *
 149  * This function is called to remove the sound device for one SSI.  We
 150  * de-program the DMACR and PMUXCR register.
 151  */
 152 int mpc8610_hpcd_machine_remove(struct platform_device *sound_device)
 153 {
 154         struct mpc8610_hpcd_data *machine_data =
 155                 sound_device->dev.platform_data;
 156
 157         /* Restore the signal routing */
 158
 159         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
 160                 machine_data->dma_channel_id[0], 0);
 161         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
 162                 machine_data->dma_channel_id[1], 0);
 163
 164         switch (machine_data->ssi_id) {
 165         case 0:
 166                 clrsetbits_be32(&machine_data->guts->pmuxcr,
 167                         CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
 168                 break;
 169         case 1:
 170                 clrsetbits_be32(&machine_data->guts->pmuxcr,
 171                         CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
 172                 break;
 173         }
 174
 175         return 0;
 176 }
 177
 178 /**
 179  * mpc8610_hpcd_ops: ASoC fabric driver operations
 180  */
 181 static struct snd_soc_ops mpc8610_hpcd_ops = {
 182         .startup = mpc8610_hpcd_startup,
 183 };
 184
 185 /**
 186  * mpc8610_hpcd_machine: ASoC machine data
 187  */
 188 static struct snd_soc_card mpc8610_hpcd_machine = {
 189         .probe = mpc8610_hpcd_machine_probe,
 190         .remove = mpc8610_hpcd_machine_remove,
 191         .name = "MPC8610 HPCD",
 192         .num_links = 1,
 193 };
 194
 195 /**
 196  * mpc8610_hpcd_probe: OF probe function for the fabric driver
 197  *
 198  * This function gets called when an SSI node is found in the device tree.
 199  *
 200  * Although this is a fabric driver, the SSI node is the "master" node with
 201  * respect to audio hardware connections.  Therefore, we create a new ASoC
 202  * device for each new SSI node that has a codec attached.
 203  *
 204  * FIXME: Currently, we only support one DMA controller, so if there are
 205  * multiple SSI nodes with codecs, only the first will be supported.
 206  *
 207  * FIXME: Even if we did support multiple DMA controllers, we have no
 208  * mechanism for assigning DMA controllers and channels to the individual
 209  * SSI devices.  We also probably aren't compatible with the generic Elo DMA
 210  * device driver.
 211  */
 212 static int mpc8610_hpcd_probe(struct of_device *ofdev,
 213         const struct of_device_id *match)
 214 {
 215         struct device_node *np = ofdev->node;
 216         struct device_node *codec_np = NULL;
 217         struct device_node *guts_np = NULL;
 218         struct device_node *dma_np = NULL;
 219         struct device_node *dma_channel_np = NULL;
 220         const phandle *codec_ph;
 221         const char *sprop;
 222         const u32 *iprop;
 223         struct resource res;
 224         struct platform_device *sound_device = NULL;
 225         struct mpc8610_hpcd_data *machine_data;
 226         struct fsl_ssi_info ssi_info;
 227         struct fsl_dma_info dma_info;
 228         int ret = -ENODEV;
 229         unsigned int playback_dma_channel;
 230         unsigned int capture_dma_channel;
 231
 232         machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
 233         if (!machine_data)
 234                 return -ENOMEM;
 235
 236         memset(&ssi_info, 0, sizeof(ssi_info));
 237         memset(&dma_info, 0, sizeof(dma_info));
 238
 239         ssi_info.dev = &ofdev->dev;
 240
 241         /*
 242          * We are only interested in SSIs with a codec phandle in them, so let's
 243          * make sure this SSI has one.
 244          */
 245         codec_ph = of_get_property(np, "codec-handle", NULL);
 246         if (!codec_ph)
 247                 goto error;
 248
 249         codec_np = of_find_node_by_phandle(*codec_ph);
 250         if (!codec_np)
 251                 goto error;
 252
 253         /* The MPC8610 HPCD only knows about the CS4270 codec, so reject
 254            anything else. */
 255         if (!of_device_is_compatible(codec_np, "cirrus,cs4270"))
 256                 goto error;
 257
 258         /* Get the device ID */
 259         iprop = of_get_property(np, "cell-index", NULL);
 260         if (!iprop) {
 261                 dev_err(&ofdev->dev, "cell-index property not found\n");
 262                 ret = -EINVAL;
 263                 goto error;
 264         }
 265         machine_data->ssi_id = *iprop;
 266         ssi_info.id = *iprop;
 267
 268         /* Get the serial format and clock direction. */
 269         sprop = of_get_property(np, "fsl,mode", NULL);
 270         if (!sprop) {
 271                 dev_err(&ofdev->dev, "fsl,mode property not found\n");
 272                 ret = -EINVAL;
 273                 goto error;
 274         }
 275
 276         if (strcasecmp(sprop, "i2s-slave") == 0) {
 277                 machine_data->dai_format = SND_SOC_DAIFMT_I2S;
 278                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 279                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 280
 281                 /*
 282                  * In i2s-slave mode, the codec has its own clock source, so we
 283                  * need to get the frequency from the device tree and pass it to
 284                  * the codec driver.
 285                  */
 286                 iprop = of_get_property(codec_np, "clock-frequency", NULL);
 287                 if (!iprop || !*iprop) {
 288                         dev_err(&ofdev->dev, "codec bus-frequency property "
 289                                 "is missing or invalid\n");
 290                         ret = -EINVAL;
 291                         goto error;
 292                 }
 293                 machine_data->clk_frequency = *iprop;
 294         } else if (strcasecmp(sprop, "i2s-master") == 0) {
 295                 machine_data->dai_format = SND_SOC_DAIFMT_I2S;
 296                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 297                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 298         } else if (strcasecmp(sprop, "lj-slave") == 0) {
 299                 machine_data->dai_format = SND_SOC_DAIFMT_LEFT_J;
 300                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 301                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 302         } else if (strcasecmp(sprop, "lj-master") == 0) {
 303                 machine_data->dai_format = SND_SOC_DAIFMT_LEFT_J;
 304                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 305                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 306         } else if (strcasecmp(sprop, "rj-slave") == 0) {
 307                 machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J;
 308                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 309                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 310         } else if (strcasecmp(sprop, "rj-master") == 0) {
 311                 machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J;
 312                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 313                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 314         } else if (strcasecmp(sprop, "ac97-slave") == 0) {
 315                 machine_data->dai_format = SND_SOC_DAIFMT_AC97;
 316                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 317                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 318         } else if (strcasecmp(sprop, "ac97-master") == 0) {
 319                 machine_data->dai_format = SND_SOC_DAIFMT_AC97;
 320                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 321                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 322         } else {
 323                 dev_err(&ofdev->dev,
 324                         "unrecognized fsl,mode property \"%s\"\n", sprop);
 325                 ret = -EINVAL;
 326                 goto error;
 327         }
 328
 329         if (!machine_data->clk_frequency) {
 330                 dev_err(&ofdev->dev, "unknown clock frequency\n");
 331                 ret = -EINVAL;
 332                 goto error;
 333         }
 334
 335         /* Read the SSI information from the device tree */
 336         ret = of_address_to_resource(np, 0, &res);
 337         if (ret) {
 338                 dev_err(&ofdev->dev, "could not obtain SSI address\n");
 339                 goto error;
 340         }
 341         if (!res.start) {
 342                 dev_err(&ofdev->dev, "invalid SSI address\n");
 343                 goto error;
 344         }
 345         ssi_info.ssi_phys = res.start;
 346
 347         machine_data->ssi = ioremap(ssi_info.ssi_phys, sizeof(struct ccsr_ssi));
 348         if (!machine_data->ssi) {
 349                 dev_err(&ofdev->dev, "could not map SSI address %x\n",
 350                         ssi_info.ssi_phys);
 351                 ret = -EINVAL;
 352                 goto error;
 353         }
 354         ssi_info.ssi = machine_data->ssi;
 355
 356
 357         /* Get the IRQ of the SSI */
 358         machine_data->ssi_irq = irq_of_parse_and_map(np, 0);
 359         if (!machine_data->ssi_irq) {
 360                 dev_err(&ofdev->dev, "could not get SSI IRQ\n");
 361                 ret = -EINVAL;
 362                 goto error;
 363         }
 364         ssi_info.irq = machine_data->ssi_irq;
 365
 366
 367         /* Map the global utilities registers. */
 368         guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
 369         if (!guts_np) {
 370                 dev_err(&ofdev->dev, "could not obtain address of GUTS\n");
 371                 ret = -EINVAL;
 372                 goto error;
 373         }
 374         machine_data->guts = of_iomap(guts_np, 0);
 375         of_node_put(guts_np);
 376         if (!machine_data->guts) {
 377                 dev_err(&ofdev->dev, "could not map GUTS\n");
 378                 ret = -EINVAL;
 379                 goto error;
 380         }
 381
 382         /* Find the DMA channels to use.  Both SSIs need to use the same DMA
 383          * controller, so let's use DMA#1.
 384          */
 385         for_each_compatible_node(dma_np, NULL, "fsl,mpc8610-dma") {
 386                 iprop = of_get_property(dma_np, "cell-index", NULL);
 387                 if (iprop && (*iprop == 0)) {
 388                         of_node_put(dma_np);
 389                         break;
 390                 }
 391         }
 392         if (!dma_np) {
 393                 dev_err(&ofdev->dev, "could not find DMA node\n");
 394                 ret = -EINVAL;
 395                 goto error;
 396         }
 397         machine_data->dma_id = *iprop;
 398
 399         /* SSI1 needs to use DMA Channels 0 and 1, and SSI2 needs to use DMA
 400          * channels 2 and 3.  This is just how the MPC8610 is wired
 401          * internally.
 402          */
 403         playback_dma_channel = (machine_data->ssi_id == 0) ? 0 : 2;
 404         capture_dma_channel = (machine_data->ssi_id == 0) ? 1 : 3;
 405
 406         /*
 407          * Find the DMA channels to use.
 408          */
 409         while ((dma_channel_np = of_get_next_child(dma_np, dma_channel_np))) {
 410                 iprop = of_get_property(dma_channel_np, "cell-index", NULL);
 411                 if (iprop && (*iprop == playback_dma_channel)) {
 412                         /* dma_channel[0] and dma_irq[0] are for playback */
 413                         dma_info.dma_channel[0] = of_iomap(dma_channel_np, 0);
 414                         dma_info.dma_irq[0] =
 415                                 irq_of_parse_and_map(dma_channel_np, 0);
 416                         machine_data->dma_channel_id[0] = *iprop;
 417                         continue;
 418                 }
 419                 if (iprop && (*iprop == capture_dma_channel)) {
 420                         /* dma_channel[1] and dma_irq[1] are for capture */
 421                         dma_info.dma_channel[1] = of_iomap(dma_channel_np, 0);
 422                         dma_info.dma_irq[1] =
 423                                 irq_of_parse_and_map(dma_channel_np, 0);
 424                         machine_data->dma_channel_id[1] = *iprop;
 425                         continue;
 426                 }
 427         }
 428         if (!dma_info.dma_channel[0] || !dma_info.dma_channel[1] ||
 429             !dma_info.dma_irq[0] || !dma_info.dma_irq[1]) {
 430                 dev_err(&ofdev->dev, "could not find DMA channels\n");
 431                 ret = -EINVAL;
 432                 goto error;
 433         }
 434
 435         dma_info.ssi_stx_phys = ssi_info.ssi_phys +
 436                 offsetof(struct ccsr_ssi, stx0);
 437         dma_info.ssi_srx_phys = ssi_info.ssi_phys +
 438                 offsetof(struct ccsr_ssi, srx0);
 439
 440         /* We have the DMA information, so tell the DMA driver what it is */
 441         if (!fsl_dma_configure(&dma_info)) {
 442                 dev_err(&ofdev->dev, "could not instantiate DMA device\n");
 443                 ret = -EBUSY;
 444                 goto error;
 445         }
 446
 447         /*
 448          * Initialize our DAI data structure.  We should probably get this
 449          * information from the device tree.
 450          */
 451         machine_data->dai.name = "CS4270";
 452         machine_data->dai.stream_name = "CS4270";
 453
 454         machine_data->dai.cpu_dai = fsl_ssi_create_dai(&ssi_info);
 455         machine_data->dai.codec_dai = &cs4270_dai; /* The codec_dai we want */
 456         machine_data->dai.ops = &mpc8610_hpcd_ops;
 457
 458         mpc8610_hpcd_machine.dai_link = &machine_data->dai;
 459
 460         /* Allocate a new audio platform device structure */
 461         sound_device = platform_device_alloc("soc-audio", -1);
 462         if (!sound_device) {
 463                 dev_err(&ofdev->dev, "platform device allocation failed\n");
 464                 ret = -ENOMEM;
 465                 goto error;
 466         }
 467
 468         machine_data->sound_devdata.card = &mpc8610_hpcd_machine;
 469         machine_data->sound_devdata.codec_dev = &soc_codec_device_cs4270;
 470         machine_data->machine.platform = &fsl_soc_platform;
 471
 472         sound_device->dev.platform_data = machine_data;
 473
 474
 475         /* Set the platform device and ASoC device to point to each other */
 476         platform_set_drvdata(sound_device, &machine_data->sound_devdata);
 477
 478         machine_data->sound_devdata.dev = &sound_device->dev;
 479
 480
 481         /* Tell ASoC to probe us.  This will call mpc8610_hpcd_machine.probe(),
 482            if it exists. */
 483         ret = platform_device_add(sound_device);
 484
 485         if (ret) {
 486                 dev_err(&ofdev->dev, "platform device add failed\n");
 487                 goto error;
 488         }
 489
 490         dev_set_drvdata(&ofdev->dev, sound_device);
 491
 492         return 0;
 493
 494 error:
 495         of_node_put(codec_np);
 496         of_node_put(guts_np);
 497         of_node_put(dma_np);
 498         of_node_put(dma_channel_np);
 499
 500         if (sound_device)
 501                 platform_device_unregister(sound_device);
 502
 503         if (machine_data->dai.cpu_dai)
 504                 fsl_ssi_destroy_dai(machine_data->dai.cpu_dai);
 505
 506         if (ssi_info.ssi)
 507                 iounmap(ssi_info.ssi);
 508
 509         if (ssi_info.irq)
 510                 irq_dispose_mapping(ssi_info.irq);
 511
 512         if (dma_info.dma_channel[0])
 513                 iounmap(dma_info.dma_channel[0]);
 514
 515         if (dma_info.dma_channel[1])
 516                 iounmap(dma_info.dma_channel[1]);
 517
 518         if (dma_info.dma_irq[0])
 519                 irq_dispose_mapping(dma_info.dma_irq[0]);
 520
 521         if (dma_info.dma_irq[1])
 522                 irq_dispose_mapping(dma_info.dma_irq[1]);
 523
 524         if (machine_data->guts)
 525                 iounmap(machine_data->guts);
 526
 527         kfree(machine_data);
 528
 529         return ret;
 530 }
 531
 532 /**
 533  * mpc8610_hpcd_remove: remove the OF device
 534  *
 535  * This function is called when the OF device is removed.
 536  */
 537 static int mpc8610_hpcd_remove(struct of_device *ofdev)
 538 {
 539         struct platform_device *sound_device = dev_get_drvdata(&ofdev->dev);
 540         struct mpc8610_hpcd_data *machine_data =
 541                 sound_device->dev.platform_data;
 542
 543         platform_device_unregister(sound_device);
 544
 545         if (machine_data->dai.cpu_dai)
 546                 fsl_ssi_destroy_dai(machine_data->dai.cpu_dai);
 547
 548         if (machine_data->ssi)
 549                 iounmap(machine_data->ssi);
 550
 551         if (machine_data->dma[0])
 552                 iounmap(machine_data->dma[0]);
 553
 554         if (machine_data->dma[1])
 555                 iounmap(machine_data->dma[1]);
 556
 557         if (machine_data->dma_irq[0])
 558                 irq_dispose_mapping(machine_data->dma_irq[0]);
 559
 560         if (machine_data->dma_irq[1])
 561                 irq_dispose_mapping(machine_data->dma_irq[1]);
 562
 563         if (machine_data->guts)
 564                 iounmap(machine_data->guts);
 565
 566         kfree(machine_data);
 567         sound_device->dev.platform_data = NULL;
 568
 569         dev_set_drvdata(&ofdev->dev, NULL);
 570
 571         return 0;
 572 }
 573
 574 static struct of_device_id mpc8610_hpcd_match[] = {
 575         {
 576                 .compatible = "fsl,mpc8610-ssi",
 577         },
 578         {}
 579 };
 580 MODULE_DEVICE_TABLE(of, mpc8610_hpcd_match);
 581
 582 static struct of_platform_driver mpc8610_hpcd_of_driver = {
 583         .owner          = THIS_MODULE,
 584         .name           = "mpc8610_hpcd",
 585         .match_table    = mpc8610_hpcd_match,
 586         .probe          = mpc8610_hpcd_probe,
 587         .remove         = mpc8610_hpcd_remove,
 588 };
 589
 590 /**
 591  * mpc8610_hpcd_init: fabric driver initialization.
 592  *
 593  * This function is called when this module is loaded.
 594  */
 595 static int __init mpc8610_hpcd_init(void)
 596 {
 597         int ret;
 598
 599         printk(KERN_INFO "Freescale MPC8610 HPCD ALSA SoC fabric driver\n");
 600
 601         ret = of_register_platform_driver(&mpc8610_hpcd_of_driver);
 602
 603         if (ret)
 604                 printk(KERN_ERR
 605                         "mpc8610-hpcd: failed to register platform driver\n");
 606
 607         return ret;
 608 }
 609
 610 /**
 611  * mpc8610_hpcd_exit: fabric driver exit
 612  *
 613  * This function is called when this driver is unloaded.
 614  */
 615 static void __exit mpc8610_hpcd_exit(void)
 616 {
 617         of_unregister_platform_driver(&mpc8610_hpcd_of_driver);
 618 }
 619
 620 module_init(mpc8610_hpcd_init);
 621 module_exit(mpc8610_hpcd_exit);
 622
 623 MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
 624 MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC fabric driver");
 625 MODULE_LICENSE("GPL");