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/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/of_device.h>
  16 #include <linux/of_platform.h>
  17 #include <sound/soc.h>
  18 #include <asm/immap_86xx.h>
  19
  20 #include "../codecs/cs4270.h"
  21 #include "fsl_dma.h"
  22 #include "fsl_ssi.h"
  23
  24 /**
  25  * mpc8610_hpcd_data: fabric-specific ASoC device data
  26  *
  27  * This structure contains data for a single sound platform device on an
  28  * MPC8610 HPCD.  Some of the data is taken from the device tree.
  29  */
  30 struct mpc8610_hpcd_data {
  31         struct snd_soc_device sound_devdata;
  32         struct snd_soc_dai_link dai;
  33         struct snd_soc_card machine;
  34         unsigned int dai_format;
  35         unsigned int codec_clk_direction;
  36         unsigned int cpu_clk_direction;
  37         unsigned int clk_frequency;
  38         struct ccsr_guts __iomem *guts;
  39         struct ccsr_ssi __iomem *ssi;
  40         unsigned int ssi_id;            /* 0 = SSI1, 1 = SSI2, etc */
  41         unsigned int ssi_irq;
  42         unsigned int dma_id;            /* 0 = DMA1, 1 = DMA2, etc */
  43         unsigned int dma_irq[2];
  44         struct ccsr_dma_channel __iomem *dma[2];
  45         unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
  46 };
  47
  48 /**
  49  * mpc8610_hpcd_machine_probe: initalize the board
  50  *
  51  * This function is called when platform_device_add() is called.  It is used
  52  * to initialize the board-specific hardware.
  53  *
  54  * Here we program the DMACR and PMUXCR registers.
  55  */
  56 static int mpc8610_hpcd_machine_probe(struct platform_device *sound_device)
  57 {
  58         struct mpc8610_hpcd_data *machine_data =
  59                 sound_device->dev.platform_data;
  60
  61         /* Program the signal routing between the SSI and the DMA */
  62         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
  63                 machine_data->dma_channel_id[0], CCSR_GUTS_DMACR_DEV_SSI);
  64         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
  65                 machine_data->dma_channel_id[1], CCSR_GUTS_DMACR_DEV_SSI);
  66
  67         guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id,
  68                 machine_data->dma_channel_id[0], 0);
  69         guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id,
  70                 machine_data->dma_channel_id[1], 0);
  71
  72         switch (machine_data->ssi_id) {
  73         case 0:
  74                 clrsetbits_be32(&machine_data->guts->pmuxcr,
  75                         CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
  76                 break;
  77         case 1:
  78                 clrsetbits_be32(&machine_data->guts->pmuxcr,
  79                         CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
  80                 break;
  81         }
  82
  83         return 0;
  84 }
  85
  86 /**
  87  * mpc8610_hpcd_startup: program the board with various hardware parameters
  88  *
  89  * This function takes board-specific information, like clock frequencies
  90  * and serial data formats, and passes that information to the codec and
  91  * transport drivers.
  92  */
  93 static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
  94 {
  95         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  96         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  97         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  98         struct mpc8610_hpcd_data *machine_data =
  99                 rtd->socdev->dev->platform_data;
 100         int ret = 0;
 101
 102         /* Tell the CPU driver what the serial protocol is. */
 103         ret = snd_soc_dai_set_fmt(cpu_dai, machine_data->dai_format);
 104         if (ret < 0) {
 105                 dev_err(substream->pcm->card->dev,
 106                         "could not set CPU driver audio format\n");
 107                 return ret;
 108         }
 109
 110         /* Tell the codec driver what the serial protocol is. */
 111         ret = snd_soc_dai_set_fmt(codec_dai, machine_data->dai_format);
 112         if (ret < 0) {
 113                 dev_err(substream->pcm->card->dev,
 114                         "could not set codec driver audio format\n");
 115                 return ret;
 116         }
 117
 118         /*
 119          * Tell the CPU driver what the clock frequency is, and whether it's a
 120          * slave or master.
 121          */
 122         ret = snd_soc_dai_set_sysclk(cpu_dai, 0,
 123                                         machine_data->clk_frequency,
 124                                         machine_data->cpu_clk_direction);
 125         if (ret < 0) {
 126                 dev_err(substream->pcm->card->dev,
 127                         "could not set CPU driver clock parameters\n");
 128                 return ret;
 129         }
 130
 131         /*
 132          * Tell the codec driver what the MCLK frequency is, and whether it's
 133          * a slave or master.
 134          */
 135         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 136                                         machine_data->clk_frequency,
 137                                         machine_data->codec_clk_direction);
 138         if (ret < 0) {
 139                 dev_err(substream->pcm->card->dev,
 140                         "could not set codec driver clock params\n");
 141                 return ret;
 142         }
 143
 144         return 0;
 145 }
 146
 147 /**
 148  * mpc8610_hpcd_machine_remove: Remove the sound device
 149  *
 150  * This function is called to remove the sound device for one SSI.  We
 151  * de-program the DMACR and PMUXCR register.
 152  */
 153 int mpc8610_hpcd_machine_remove(struct platform_device *sound_device)
 154 {
 155         struct mpc8610_hpcd_data *machine_data =
 156                 sound_device->dev.platform_data;
 157
 158         /* Restore the signal routing */
 159
 160         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
 161                 machine_data->dma_channel_id[0], 0);
 162         guts_set_dmacr(machine_data->guts, machine_data->dma_id,
 163                 machine_data->dma_channel_id[1], 0);
 164
 165         switch (machine_data->ssi_id) {
 166         case 0:
 167                 clrsetbits_be32(&machine_data->guts->pmuxcr,
 168                         CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
 169                 break;
 170         case 1:
 171                 clrsetbits_be32(&machine_data->guts->pmuxcr,
 172                         CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
 173                 break;
 174         }
 175
 176         return 0;
 177 }
 178
 179 /**
 180  * mpc8610_hpcd_ops: ASoC fabric driver operations
 181  */
 182 static struct snd_soc_ops mpc8610_hpcd_ops = {
 183         .startup = mpc8610_hpcd_startup,
 184 };
 185
 186 /**
 187  * mpc8610_hpcd_probe: OF probe function for the fabric driver
 188  *
 189  * This function gets called when an SSI node is found in the device tree.
 190  *
 191  * Although this is a fabric driver, the SSI node is the "master" node with
 192  * respect to audio hardware connections.  Therefore, we create a new ASoC
 193  * device for each new SSI node that has a codec attached.
 194  *
 195  * FIXME: Currently, we only support one DMA controller, so if there are
 196  * multiple SSI nodes with codecs, only the first will be supported.
 197  *
 198  * FIXME: Even if we did support multiple DMA controllers, we have no
 199  * mechanism for assigning DMA controllers and channels to the individual
 200  * SSI devices.  We also probably aren't compatible with the generic Elo DMA
 201  * device driver.
 202  */
 203 static int mpc8610_hpcd_probe(struct of_device *ofdev,
 204         const struct of_device_id *match)
 205 {
 206         struct device_node *np = ofdev->dev.of_node;
 207         struct device_node *codec_np = NULL;
 208         struct device_node *guts_np = NULL;
 209         struct device_node *dma_np = NULL;
 210         struct device_node *dma_channel_np = NULL;
 211         const phandle *codec_ph;
 212         const char *sprop;
 213         const u32 *iprop;
 214         struct resource res;
 215         struct platform_device *sound_device = NULL;
 216         struct mpc8610_hpcd_data *machine_data;
 217         struct fsl_ssi_info ssi_info;
 218         struct fsl_dma_info dma_info;
 219         int ret = -ENODEV;
 220         unsigned int playback_dma_channel;
 221         unsigned int capture_dma_channel;
 222
 223         machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
 224         if (!machine_data)
 225                 return -ENOMEM;
 226
 227         memset(&ssi_info, 0, sizeof(ssi_info));
 228         memset(&dma_info, 0, sizeof(dma_info));
 229
 230         ssi_info.dev = &ofdev->dev;
 231
 232         /*
 233          * We are only interested in SSIs with a codec phandle in them, so let's
 234          * make sure this SSI has one.
 235          */
 236         codec_ph = of_get_property(np, "codec-handle", NULL);
 237         if (!codec_ph)
 238                 goto error;
 239
 240         codec_np = of_find_node_by_phandle(*codec_ph);
 241         if (!codec_np)
 242                 goto error;
 243
 244         /* The MPC8610 HPCD only knows about the CS4270 codec, so reject
 245            anything else. */
 246         if (!of_device_is_compatible(codec_np, "cirrus,cs4270"))
 247                 goto error;
 248
 249         /* Get the device ID */
 250         iprop = of_get_property(np, "cell-index", NULL);
 251         if (!iprop) {
 252                 dev_err(&ofdev->dev, "cell-index property not found\n");
 253                 ret = -EINVAL;
 254                 goto error;
 255         }
 256         machine_data->ssi_id = *iprop;
 257         ssi_info.id = *iprop;
 258
 259         /* Get the serial format and clock direction. */
 260         sprop = of_get_property(np, "fsl,mode", NULL);
 261         if (!sprop) {
 262                 dev_err(&ofdev->dev, "fsl,mode property not found\n");
 263                 ret = -EINVAL;
 264                 goto error;
 265         }
 266
 267         if (strcasecmp(sprop, "i2s-slave") == 0) {
 268                 machine_data->dai_format = SND_SOC_DAIFMT_I2S;
 269                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 270                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 271
 272                 /*
 273                  * In i2s-slave mode, the codec has its own clock source, so we
 274                  * need to get the frequency from the device tree and pass it to
 275                  * the codec driver.
 276                  */
 277                 iprop = of_get_property(codec_np, "clock-frequency", NULL);
 278                 if (!iprop || !*iprop) {
 279                         dev_err(&ofdev->dev, "codec bus-frequency property "
 280                                 "is missing or invalid\n");
 281                         ret = -EINVAL;
 282                         goto error;
 283                 }
 284                 machine_data->clk_frequency = *iprop;
 285         } else if (strcasecmp(sprop, "i2s-master") == 0) {
 286                 machine_data->dai_format = SND_SOC_DAIFMT_I2S;
 287                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 288                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 289         } else if (strcasecmp(sprop, "lj-slave") == 0) {
 290                 machine_data->dai_format = SND_SOC_DAIFMT_LEFT_J;
 291                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 292                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 293         } else if (strcasecmp(sprop, "lj-master") == 0) {
 294                 machine_data->dai_format = SND_SOC_DAIFMT_LEFT_J;
 295                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 296                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 297         } else if (strcasecmp(sprop, "rj-slave") == 0) {
 298                 machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J;
 299                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 300                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 301         } else if (strcasecmp(sprop, "rj-master") == 0) {
 302                 machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J;
 303                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 304                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 305         } else if (strcasecmp(sprop, "ac97-slave") == 0) {
 306                 machine_data->dai_format = SND_SOC_DAIFMT_AC97;
 307                 machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
 308                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
 309         } else if (strcasecmp(sprop, "ac97-master") == 0) {
 310                 machine_data->dai_format = SND_SOC_DAIFMT_AC97;
 311                 machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
 312                 machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
 313         } else {
 314                 dev_err(&ofdev->dev,
 315                         "unrecognized fsl,mode property \"%s\"\n", sprop);
 316                 ret = -EINVAL;
 317                 goto error;
 318         }
 319
 320         if (!machine_data->clk_frequency) {
 321                 dev_err(&ofdev->dev, "unknown clock frequency\n");
 322                 ret = -EINVAL;
 323                 goto error;
 324         }
 325
 326         /* Read the SSI information from the device tree */
 327         ret = of_address_to_resource(np, 0, &res);
 328         if (ret) {
 329                 dev_err(&ofdev->dev, "could not obtain SSI address\n");
 330                 goto error;
 331         }
 332         if (!res.start) {
 333                 dev_err(&ofdev->dev, "invalid SSI address\n");
 334                 goto error;
 335         }
 336         ssi_info.ssi_phys = res.start;
 337
 338         machine_data->ssi = ioremap(ssi_info.ssi_phys, sizeof(struct ccsr_ssi));
 339         if (!machine_data->ssi) {
 340                 dev_err(&ofdev->dev, "could not map SSI address %x\n",
 341                         ssi_info.ssi_phys);
 342                 ret = -EINVAL;
 343                 goto error;
 344         }
 345         ssi_info.ssi = machine_data->ssi;
 346
 347
 348         /* Get the IRQ of the SSI */
 349         machine_data->ssi_irq = irq_of_parse_and_map(np, 0);
 350         if (!machine_data->ssi_irq) {
 351                 dev_err(&ofdev->dev, "could not get SSI IRQ\n");
 352                 ret = -EINVAL;
 353                 goto error;
 354         }
 355         ssi_info.irq = machine_data->ssi_irq;
 356
 357         /* Do we want to use asynchronous mode? */
 358         ssi_info.asynchronous =
 359                 of_find_property(np, "fsl,ssi-asynchronous", NULL) ? 1 : 0;
 360         if (ssi_info.asynchronous)
 361                 dev_info(&ofdev->dev, "using asynchronous mode\n");
 362
 363         /* Map the global utilities registers. */
 364         guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
 365         if (!guts_np) {
 366                 dev_err(&ofdev->dev, "could not obtain address of GUTS\n");
 367                 ret = -EINVAL;
 368                 goto error;
 369         }
 370         machine_data->guts = of_iomap(guts_np, 0);
 371         of_node_put(guts_np);
 372         if (!machine_data->guts) {
 373                 dev_err(&ofdev->dev, "could not map GUTS\n");
 374                 ret = -EINVAL;
 375                 goto error;
 376         }
 377
 378         /* Find the DMA channels to use.  Both SSIs need to use the same DMA
 379          * controller, so let's use DMA#1.
 380          */
 381         for_each_compatible_node(dma_np, NULL, "fsl,mpc8610-dma") {
 382                 iprop = of_get_property(dma_np, "cell-index", NULL);
 383                 if (iprop && (*iprop == 0)) {
 384                         of_node_put(dma_np);
 385                         break;
 386                 }
 387         }
 388         if (!dma_np) {
 389                 dev_err(&ofdev->dev, "could not find DMA node\n");
 390                 ret = -EINVAL;
 391                 goto error;
 392         }
 393         machine_data->dma_id = *iprop;
 394
 395         /* SSI1 needs to use DMA Channels 0 and 1, and SSI2 needs to use DMA
 396          * channels 2 and 3.  This is just how the MPC8610 is wired
 397          * internally.
 398          */
 399         playback_dma_channel = (machine_data->ssi_id == 0) ? 0 : 2;
 400         capture_dma_channel = (machine_data->ssi_id == 0) ? 1 : 3;
 401
 402         /*
 403          * Find the DMA channels to use.
 404          */
 405         while ((dma_channel_np = of_get_next_child(dma_np, dma_channel_np))) {
 406                 iprop = of_get_property(dma_channel_np, "cell-index", NULL);
 407                 if (iprop && (*iprop == playback_dma_channel)) {
 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 == capture_dma_channel)) {
 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         machine_data->machine.probe = mpc8610_hpcd_machine_probe;
 455         machine_data->machine.remove = mpc8610_hpcd_machine_remove;
 456         machine_data->machine.name = "MPC8610 HPCD";
 457         machine_data->machine.num_links = 1;
 458         machine_data->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 = &machine_data->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         .driver = {
 584                 .name = "mpc8610_hpcd",
 585                 .owner = THIS_MODULE,
 586                 .of_match_table = mpc8610_hpcd_match,
 587         },
 588         .probe          = mpc8610_hpcd_probe,
 589         .remove         = mpc8610_hpcd_remove,
 590 };
 591
 592 /**
 593  * mpc8610_hpcd_init: fabric driver initialization.
 594  *
 595  * This function is called when this module is loaded.
 596  */
 597 static int __init mpc8610_hpcd_init(void)
 598 {
 599         int ret;
 600
 601         printk(KERN_INFO "Freescale MPC8610 HPCD ALSA SoC fabric driver\n");
 602
 603         ret = of_register_platform_driver(&mpc8610_hpcd_of_driver);
 604
 605         if (ret)
 606                 printk(KERN_ERR
 607                         "mpc8610-hpcd: failed to register platform driver\n");
 608
 609         return ret;
 610 }
 611
 612 /**
 613  * mpc8610_hpcd_exit: fabric driver exit
 614  *
 615  * This function is called when this driver is unloaded.
 616  */
 617 static void __exit mpc8610_hpcd_exit(void)
 618 {
 619         of_unregister_platform_driver(&mpc8610_hpcd_of_driver);
 620 }
 621
 622 module_init(mpc8610_hpcd_init);
 623 module_exit(mpc8610_hpcd_exit);
 624
 625 MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
 626 MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC fabric driver");
 627 MODULE_LICENSE("GPL");