/*
      card-azt2320.c - driver for Aztech Systems AZT2320 based soundcards.
      Copyright (C) 1999-2000 by Massimo Piccioni <dafastidio@libero.it>
  
      This program is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation; either version 2 of the License, or
      (at your option) any later version.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  
      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
  
  /*
      This driver should provide support for most Aztech AZT2320 based cards.
      Several AZT2316 chips are also supported/tested, but autoprobe doesn't
      work: all module option have to be set.
  
      No docs available for us at Aztech headquarters !!!   Unbelievable ...
      No other help obtained.
  
      Thanks to Rainer Wiesner <rainer.wiesner@01019freenet.de> for the WSS
      activation method (full-duplex audio!).
  */

  #include <asm/io.h>
  #include <linux/delay.h>
  #include <linux/init.h>
  #include <linux/time.h>
  #include <linux/wait.h>
  #include <linux/pnp.h>

  #include <linux/module.h>

  #include <sound/core.h>
  #include <sound/initval.h>

  #include <sound/wss.h>

  #include <sound/mpu401.h>
  #include <sound/opl3.h>
  
  #define PFX "azt2320: "
  
  MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
  MODULE_DESCRIPTION("Aztech Systems AZT2320");
  MODULE_LICENSE("GPL");
  MODULE_SUPPORTED_DEVICE("{{Aztech Systems,PRO16V},"
  		"{Aztech Systems,AZT2320},"
  		"{Aztech Systems,AZT3300},"
  		"{Aztech Systems,AZT2320},"
  		"{Aztech Systems,AZT3000}}");
  
  static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
  static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */

  static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP; /* Enable this card */

  static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* PnP setup */
  static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* PnP setup */
  static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* PnP setup */
  static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* PnP setup */
  static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* Pnp setup */
  static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* Pnp setup */
  static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* PnP setup */
  static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* PnP setup */
  
  module_param_array(index, int, NULL, 0444);
  MODULE_PARM_DESC(index, "Index value for azt2320 based soundcard.");
  module_param_array(id, charp, NULL, 0444);
  MODULE_PARM_DESC(id, "ID string for azt2320 based soundcard.");
  module_param_array(enable, bool, NULL, 0444);
  MODULE_PARM_DESC(enable, "Enable azt2320 based soundcard.");

  
  struct snd_card_azt2320 {
  	int dev_no;
  	struct pnp_dev *dev;
  	struct pnp_dev *devmpu;

  	struct snd_wss *chip;

  };
  
  static struct pnp_card_device_id snd_azt2320_pnpids[] = {
  	/* PRO16V */
  	{ .id = "AZT1008", .devs = { { "AZT1008" }, { "AZT2001" }, } },
  	/* Aztech Sound Galaxy 16 */
  	{ .id = "AZT2320", .devs = { { "AZT0001" }, { "AZT0002" }, } },
  	/* Packard Bell Sound III 336 AM/SP */
  	{ .id = "AZT3000", .devs = { { "AZT1003" }, { "AZT2001" }, } },
  	/* AT3300 */
  	{ .id = "AZT3002", .devs = { { "AZT1004" }, { "AZT2001" }, } },
  	/* --- */
  	{ .id = "AZT3005", .devs = { { "AZT1003" }, { "AZT2001" }, } },
  	/* --- */
  	{ .id = "AZT3011", .devs = { { "AZT1003" }, { "AZT2001" }, } },
  	{ .id = "" }	/* end */
  };
  
  MODULE_DEVICE_TABLE(pnp_card, snd_azt2320_pnpids);
  
  #define	DRIVER_NAME	"snd-card-azt2320"
  
  static int __devinit snd_card_azt2320_pnp(int dev, struct snd_card_azt2320 *acard,
  					  struct pnp_card_link *card,
  					  const struct pnp_card_device_id *id)
  {
  	struct pnp_dev *pdev;

  	int err;

  	acard->dev = pnp_request_card_device(card, id->devs[0].id, NULL);

  	if (acard->dev == NULL)

  		return -ENODEV;

  
  	acard->devmpu = pnp_request_card_device(card, id->devs[1].id, NULL);
  
  	pdev = acard->dev;

  
  	err = pnp_activate_dev(pdev);
  	if (err < 0) {
  		snd_printk(KERN_ERR PFX "AUDIO pnp configure failure
  ");

  		return err;
  	}
  	port[dev] = pnp_port_start(pdev, 0);
  	fm_port[dev] = pnp_port_start(pdev, 1);
  	wss_port[dev] = pnp_port_start(pdev, 2);
  	dma1[dev] = pnp_dma(pdev, 0);
  	dma2[dev] = pnp_dma(pdev, 1);
  	irq[dev] = pnp_irq(pdev, 0);
  
  	pdev = acard->devmpu;
  	if (pdev != NULL) {

  		err = pnp_activate_dev(pdev);
  		if (err < 0)
  			goto __mpu_error;
  		mpu_port[dev] = pnp_port_start(pdev, 0);
  		mpu_irq[dev] = pnp_irq(pdev, 0);
  	} else {
  	     __mpu_error:
  	     	if (pdev) {
  		     	pnp_release_card_device(pdev);
  	     		snd_printk(KERN_ERR PFX "MPU401 pnp configure failure, skipping
  ");
  	     	}
  	     	acard->devmpu = NULL;
  	     	mpu_port[dev] = -1;
  	}

  	return 0;
  }
  
  /* same of snd_sbdsp_command by Jaroslav Kysela */
  static int __devinit snd_card_azt2320_command(unsigned long port, unsigned char val)
  {
  	int i;
  	unsigned long limit;
  
  	limit = jiffies + HZ / 10;
  	for (i = 50000; i && time_after(limit, jiffies); i--)
  		if (!(inb(port + 0x0c) & 0x80)) {
  			outb(val, port + 0x0c);
  			return 0;
  		}
  	return -EBUSY;
  }
  
  static int __devinit snd_card_azt2320_enable_wss(unsigned long port)
  {
  	int error;
  
  	if ((error = snd_card_azt2320_command(port, 0x09)))
  		return error;
  	if ((error = snd_card_azt2320_command(port, 0x00)))
  		return error;
  
  	mdelay(5);
  	return 0;
  }
  
  static int __devinit snd_card_azt2320_probe(int dev,
  					    struct pnp_card_link *pcard,
  					    const struct pnp_card_device_id *pid)
  {
  	int error;

  	struct snd_card *card;

  	struct snd_card_azt2320 *acard;

  	struct snd_wss *chip;

  	struct snd_opl3 *opl3;

  	error = snd_card_create(index[dev], id[dev], THIS_MODULE,
  				sizeof(struct snd_card_azt2320), &card);
  	if (error < 0)
  		return error;

  	acard = card->private_data;

  
  	if ((error = snd_card_azt2320_pnp(dev, acard, pcard, pid))) {
  		snd_card_free(card);
  		return error;
  	}
  	snd_card_set_dev(card, &pcard->card->dev);
  
  	if ((error = snd_card_azt2320_enable_wss(port[dev]))) {
  		snd_card_free(card);
  		return error;
  	}

  	error = snd_wss_create(card, wss_port[dev], -1,
  			       irq[dev],
  			       dma1[dev], dma2[dev],
  			       WSS_HW_DETECT, 0, &chip);
  	if (error < 0) {

  		snd_card_free(card);
  		return error;
  	}
  
  	strcpy(card->driver, "AZT2320");
  	strcpy(card->shortname, "Aztech AZT2320");
  	sprintf(card->longname, "%s, WSS at 0x%lx, irq %i, dma %i&%i",
  		card->shortname, chip->port, irq[dev], dma1[dev], dma2[dev]);

  	error = snd_wss_pcm(chip, 0, NULL);
  	if (error < 0) {

  		snd_card_free(card);
  		return error;
  	}

  	error = snd_wss_mixer(chip);
  	if (error < 0) {

  		snd_card_free(card);
  		return error;
  	}

  	error = snd_wss_timer(chip, 0, NULL);
  	if (error < 0) {

  		snd_card_free(card);
  		return error;
  	}
  
  	if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
  		if (snd_mpu401_uart_new(card, 0, MPU401_HW_AZT2320,
  				mpu_port[dev], 0,

  				mpu_irq[dev], NULL) < 0)

  			snd_printk(KERN_ERR PFX "no MPU-401 device at 0x%lx
  ", mpu_port[dev]);
  	}
  
  	if (fm_port[dev] > 0 && fm_port[dev] != SNDRV_AUTO_PORT) {
  		if (snd_opl3_create(card,
  				    fm_port[dev], fm_port[dev] + 2,
  				    OPL3_HW_AUTO, 0, &opl3) < 0) {
  			snd_printk(KERN_ERR PFX "no OPL device at 0x%lx-0x%lx
  ",
  				   fm_port[dev], fm_port[dev] + 2);
  		} else {
  			if ((error = snd_opl3_timer_new(opl3, 1, 2)) < 0) {
  				snd_card_free(card);
  				return error;
  			}
  			if ((error = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
  				snd_card_free(card);
  				return error;
  			}
  		}
  	}
  
  	if ((error = snd_card_register(card)) < 0) {
  		snd_card_free(card);
  		return error;
  	}
  	pnp_set_card_drvdata(pcard, card);
  	return 0;
  }

  static unsigned int __devinitdata azt2320_devices;

  static int __devinit snd_azt2320_pnp_detect(struct pnp_card_link *card,
  					    const struct pnp_card_device_id *id)
  {
  	static int dev;
  	int res;
  
  	for ( ; dev < SNDRV_CARDS; dev++) {
  		if (!enable[dev])
  			continue;
  		res = snd_card_azt2320_probe(dev, card, id);
  		if (res < 0)
  			return res;
  		dev++;

  		azt2320_devices++;

  		return 0;
  	}
          return -ENODEV;
  }
  
  static void __devexit snd_azt2320_pnp_remove(struct pnp_card_link * pcard)
  {

  	snd_card_free(pnp_get_card_drvdata(pcard));
  	pnp_set_card_drvdata(pcard, NULL);
  }
  
  #ifdef CONFIG_PM
  static int snd_azt2320_pnp_suspend(struct pnp_card_link *pcard, pm_message_t state)
  {
  	struct snd_card *card = pnp_get_card_drvdata(pcard);
  	struct snd_card_azt2320 *acard = card->private_data;

  	struct snd_wss *chip = acard->chip;

  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
  	chip->suspend(chip);
  	return 0;
  }
  
  static int snd_azt2320_pnp_resume(struct pnp_card_link *pcard)
  {
  	struct snd_card *card = pnp_get_card_drvdata(pcard);
  	struct snd_card_azt2320 *acard = card->private_data;

  	struct snd_wss *chip = acard->chip;

  	chip->resume(chip);
  	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
  	return 0;

  }

  #endif

  
  static struct pnp_card_driver azt2320_pnpc_driver = {
  	.flags          = PNP_DRIVER_RES_DISABLE,
  	.name           = "azt2320",
  	.id_table       = snd_azt2320_pnpids,
  	.probe          = snd_azt2320_pnp_detect,
  	.remove         = __devexit_p(snd_azt2320_pnp_remove),

  #ifdef CONFIG_PM
  	.suspend	= snd_azt2320_pnp_suspend,
  	.resume		= snd_azt2320_pnp_resume,
  #endif

  };
  
  static int __init alsa_card_azt2320_init(void)
  {

  	int err;
  
  	err = pnp_register_card_driver(&azt2320_pnpc_driver);
  	if (err)
  		return err;

  	if (!azt2320_devices) {

  		pnp_unregister_card_driver(&azt2320_pnpc_driver);

  #ifdef MODULE

  		snd_printk(KERN_ERR "no AZT2320 based soundcards found
  ");

  #endif

  		return -ENODEV;
  	}
  	return 0;

  }
  
  static void __exit alsa_card_azt2320_exit(void)
  {
  	pnp_unregister_card_driver(&azt2320_pnpc_driver);
  }
  
  module_init(alsa_card_azt2320_init)
  module_exit(alsa_card_azt2320_exit)