Quelle  xfi.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * xfi linux driver.
 *
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 */

#include <linux/init.h>
#include <linux/pci.h>
#include <linux/moduleparam.h>
#include <linux/pci_ids.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/initval.h>
#include "ctatc.h"
#include "cthardware.h"

MODULE_AUTHOR("Creative Technology Ltd");
MODULE_DESCRIPTION("X-Fi driver version 1.03");
MODULE_LICENSE("GPL v2");

static unsigned int reference_rate = 48000;
static unsigned int multiple = 2;
MODULE_PARM_DESC(reference_rate, "Reference rate (default=48000)");
module_param(reference_rate, uint, 0444);
MODULE_PARM_DESC(multiple, "Rate multiplier (default=2)");
module_param(multiple, uint, 0444);

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
static unsigned int subsystem[SNDRV_CARDS];

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Creative X-Fi driver");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for Creative X-Fi driver");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Creative X-Fi driver");
module_param_array(subsystem, int, NULL, 0444);
MODULE_PARM_DESC(subsystem, "Override subsystem ID for Creative X-Fi driver");

static const struct pci_device_id ct_pci_dev_ids[] = {
 /* only X-Fi is supported, so... */
 { PCI_DEVICE(PCI_VENDOR_ID_CREATIVE, PCI_DEVICE_ID_CREATIVE_20K1),
   .driver_data = ATC20K1,
 },
 { PCI_DEVICE(PCI_VENDOR_ID_CREATIVE, PCI_DEVICE_ID_CREATIVE_20K2),
   .driver_data = ATC20K2,
 },
 { 0, }
};
MODULE_DEVICE_TABLE(pci, ct_pci_dev_ids);

static int
ct_card_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
 static int dev;
 struct snd_card *card;
 struct ct_atc *atc;
 int err;

 if (dev >= SNDRV_CARDS)
  return -ENODEV;

 if (!enable[dev]) {
  dev++;
  return -ENOENT;
 }
 err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
      0, &card);
 if (err)
  return err;
 if ((reference_rate != 48000) && (reference_rate != 44100)) {
  dev_err(card->dev,
   "Invalid reference_rate value %u!!!\n",
   reference_rate);
  dev_err(card->dev,
   "The valid values for reference_rate are 48000 and 44100, Value 48000 is assumed.\n");
  reference_rate = 48000;
 }
 if ((multiple != 1) && (multiple != 2) && (multiple != 4)) {
  dev_err(card->dev, "Invalid multiple value %u!!!\n",
   multiple);
  dev_err(card->dev,
   "The valid values for multiple are 1, 2 and 4, Value 2 is assumed.\n");
  multiple = 2;
 }
 err = ct_atc_create(card, pci, reference_rate, multiple,
       pci_id->driver_data, subsystem[dev], &atc);
 if (err < 0)
  goto error;

 card->private_data = atc;

 /* Create alsa devices supported by this card */
 err = ct_atc_create_alsa_devs(atc);
 if (err < 0)
  goto error;

 strscpy(card->driver, "SB-XFi");
 strscpy(card->shortname, "Creative X-Fi");
 snprintf(card->longname, sizeof(card->longname), "%s %s %s",
   card->shortname, atc->chip_name, atc->model_name);

 err = snd_card_register(card);
 if (err < 0)
  goto error;

 pci_set_drvdata(pci, card);
 dev++;

 return 0;

error:
 snd_card_free(card);
 return err;
}

static void ct_card_remove(struct pci_dev *pci)
{
 snd_card_free(pci_get_drvdata(pci));
}

#ifdef CONFIG_PM_SLEEP
static int ct_card_suspend(struct device *dev)
{
 struct snd_card *card = dev_get_drvdata(dev);
 struct ct_atc *atc = card->private_data;

 return atc->suspend(atc);
}

static int ct_card_resume(struct device *dev)
{
 struct snd_card *card = dev_get_drvdata(dev);
 struct ct_atc *atc = card->private_data;

 return atc->resume(atc);
}

static SIMPLE_DEV_PM_OPS(ct_card_pm, ct_card_suspend, ct_card_resume);
#define CT_CARD_PM_OPS &ct_card_pm
#else
#define CT_CARD_PM_OPS NULL
#endif

static struct pci_driver ct_driver = {
 .name = KBUILD_MODNAME,
 .id_table = ct_pci_dev_ids,
 .probe = ct_card_probe,
 .remove = ct_card_remove,
 .driver = {
  .pm = CT_CARD_PM_OPS,
 },
};

module_pci_driver(ct_driver);