text: 
  /*
   * jazz16.c - driver for Media Vision Jazz16 based soundcards.
   * Copyright (C) 2009 Krzysztof Helt <krzysztof.h1@wp.pl>
   * Based on patches posted by Rask Ingemann Lambertsen and Rene Herman.
   * Based on OSS Sound Blaster driver.
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file COPYING in the main directory of this archive for
   * more details.
   *
   */
  
  #include <linux/init.h>
  #include <linux/module.h>
  #include <linux/io.h>
  #include <linux/delay.h>
  #include <asm/dma.h>
  #include <linux/isa.h>
  #include <sound/core.h>
  #include <sound/mpu401.h>
  #include <sound/opl3.h>
  #include <sound/sb.h>
  #define SNDRV_LEGACY_FIND_FREE_IRQ
  #define SNDRV_LEGACY_FIND_FREE_DMA
  #include <sound/initval.h>
  
  #define PFX "jazz16: "
  
  MODULE_DESCRIPTION("Media Vision Jazz16");
  MODULE_SUPPORTED_DEVICE("{{Media Vision ??? },"
  		"{RTL,RTL3000}}");
  
  MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
  MODULE_LICENSE("GPL");
  
  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;	/* Enable this card */
  static unsigned long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  static unsigned long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
  static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
  static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
  static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
  static int dma16[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
  
  module_param_array(index, int, NULL, 0444);
  MODULE_PARM_DESC(index, "Index value for Media Vision Jazz16 based soundcard.");
  module_param_array(id, charp, NULL, 0444);
  MODULE_PARM_DESC(id, "ID string for Media Vision Jazz16 based soundcard.");
  module_param_array(enable, bool, NULL, 0444);
  MODULE_PARM_DESC(enable, "Enable Media Vision Jazz16 based soundcard.");
  module_param_array(port, long, NULL, 0444);
  MODULE_PARM_DESC(port, "Port # for jazz16 driver.");
  module_param_array(mpu_port, long, NULL, 0444);
  MODULE_PARM_DESC(mpu_port, "MPU-401 port # for jazz16 driver.");
  module_param_array(irq, int, NULL, 0444);
  MODULE_PARM_DESC(irq, "IRQ # for jazz16 driver.");
  module_param_array(mpu_irq, int, NULL, 0444);
  MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for jazz16 driver.");
  module_param_array(dma8, int, NULL, 0444);
  MODULE_PARM_DESC(dma8, "DMA8 # for jazz16 driver.");
  module_param_array(dma16, int, NULL, 0444);
  MODULE_PARM_DESC(dma16, "DMA16 # for jazz16 driver.");
  
  #define SB_JAZZ16_WAKEUP	0xaf
  #define SB_JAZZ16_SET_PORTS	0x50
  #define SB_DSP_GET_JAZZ_BRD_REV	0xfa
  #define SB_JAZZ16_SET_DMAINTR	0xfb
  #define SB_DSP_GET_JAZZ_MODEL	0xfe
  
  struct snd_card_jazz16 {
  	struct snd_sb *chip;
  };
  
  static irqreturn_t jazz16_interrupt(int irq, void *chip)
  {
  	return snd_sb8dsp_interrupt(chip);
  }
  
  static int jazz16_configure_ports(unsigned long port,
  				  unsigned long mpu_port, int idx)
  {
  	unsigned char val;
  
  	if (!request_region(0x201, 1, "jazz16 config")) {
  		snd_printk(KERN_ERR "config port region is already in use.\n");
  		return -EBUSY;
  	}
  	outb(SB_JAZZ16_WAKEUP - idx, 0x201);
  	udelay(100);
  	outb(SB_JAZZ16_SET_PORTS + idx, 0x201);
  	udelay(100);
  	val = port & 0x70;
  	val |= (mpu_port & 0x30) >> 4;
  	outb(val, 0x201);
  
  	release_region(0x201, 1);
  	return 0;
  }
  
  static int jazz16_detect_board(unsigned long port,
  			       unsigned long mpu_port)
  {
  	int err;
  	int val;
  	struct snd_sb chip;
  
  	if (!request_region(port, 0x10, "jazz16")) {
  		snd_printk(KERN_ERR "I/O port region is already in use.\n");
  		return -EBUSY;
  	}
  	/* just to call snd_sbdsp_command/reset/get_byte() */
  	chip.port = port;
  
  	err = snd_sbdsp_reset(&chip);
  	if (err < 0)
  		for (val = 0; val < 4; val++) {
  			err = jazz16_configure_ports(port, mpu_port, val);
  			if (err < 0)
  				break;
  
  			err = snd_sbdsp_reset(&chip);
  			if (!err)
  				break;
  		}
  	if (err < 0) {
  		err = -ENODEV;
  		goto err_unmap;
  	}
  	if (!snd_sbdsp_command(&chip, SB_DSP_GET_JAZZ_BRD_REV)) {
  		err = -EBUSY;
  		goto err_unmap;
  	}
  	val = snd_sbdsp_get_byte(&chip);
  	if (val >= 0x30)
  		snd_sbdsp_get_byte(&chip);
  
  	if ((val & 0xf0) != 0x10) {
  		err = -ENODEV;
  		goto err_unmap;
  	}
  	if (!snd_sbdsp_command(&chip, SB_DSP_GET_JAZZ_MODEL)) {
  		err = -EBUSY;
  		goto err_unmap;
  	}
  	snd_sbdsp_get_byte(&chip);
  	err = snd_sbdsp_get_byte(&chip);
  	snd_printd("Media Vision Jazz16 board detected: rev 0x%x, model 0x%x\n",
  		   val, err);
  
  	err = 0;
  
  err_unmap:
  	release_region(port, 0x10);
  	return err;
  }
  
  static int jazz16_configure_board(struct snd_sb *chip, int mpu_irq)
  {
  	static unsigned char jazz_irq_bits[] = { 0, 0, 2, 3, 0, 1, 0, 4,
  						 0, 2, 5, 0, 0, 0, 0, 6 };
  	static unsigned char jazz_dma_bits[] = { 0, 1, 0, 2, 0, 3, 0, 4 };
  
  	if (jazz_dma_bits[chip->dma8] == 0 ||
  	    jazz_dma_bits[chip->dma16] == 0 ||
  	    jazz_irq_bits[chip->irq] == 0)
  		return -EINVAL;
  
  	if (!snd_sbdsp_command(chip, SB_JAZZ16_SET_DMAINTR))
  		return -EBUSY;
  
  	if (!snd_sbdsp_command(chip,
  			       jazz_dma_bits[chip->dma8] |
  			       (jazz_dma_bits[chip->dma16] << 4)))
  		return -EBUSY;
  
  	if (!snd_sbdsp_command(chip,
  			       jazz_irq_bits[chip->irq] |
  			       (jazz_irq_bits[mpu_irq] << 4)))
  		return -EBUSY;
  
  	return 0;
  }
  
  static int snd_jazz16_match(struct device *devptr, unsigned int dev)
  {
  	if (!enable[dev])
  		return 0;
  	if (port[dev] == SNDRV_AUTO_PORT) {
  		snd_printk(KERN_ERR "please specify port\n");
  		return 0;
  	} else if (port[dev] == 0x200 || (port[dev] & ~0x270)) {
  		snd_printk(KERN_ERR "incorrect port specified\n");
  		return 0;
  	}
  	if (dma8[dev] != SNDRV_AUTO_DMA &&
  	    dma8[dev] != 1 && dma8[dev] != 3) {
  		snd_printk(KERN_ERR "dma8 must be 1 or 3\n");
  		return 0;
  	}
  	if (dma16[dev] != SNDRV_AUTO_DMA &&
  	    dma16[dev] != 5 && dma16[dev] != 7) {
  		snd_printk(KERN_ERR "dma16 must be 5 or 7\n");
  		return 0;
  	}
  	if (mpu_port[dev] != SNDRV_AUTO_PORT &&
  	    (mpu_port[dev] & ~0x030) != 0x300) {
  		snd_printk(KERN_ERR "incorrect mpu_port specified\n");
  		return 0;
  	}
  	if (mpu_irq[dev] != SNDRV_AUTO_DMA &&
  	    mpu_irq[dev] != 2 && mpu_irq[dev] != 3 &&
  	    mpu_irq[dev] != 5 && mpu_irq[dev] != 7) {
  		snd_printk(KERN_ERR "mpu_irq must be 2, 3, 5 or 7\n");
  		return 0;
  	}
  	return 1;
  }
  
  static int snd_jazz16_probe(struct device *devptr, unsigned int dev)
  {
  	struct snd_card *card;
  	struct snd_card_jazz16 *jazz16;
  	struct snd_sb *chip;
  	struct snd_opl3 *opl3;
  	static int possible_irqs[] = {2, 3, 5, 7, 9, 10, 15, -1};
  	static int possible_dmas8[] = {1, 3, -1};
  	static int possible_dmas16[] = {5, 7, -1};
  	int err, xirq, xdma8, xdma16, xmpu_port, xmpu_irq;
  
  	err = snd_card_create(index[dev], id[dev], THIS_MODULE,
  			      sizeof(struct snd_card_jazz16), &card);
  	if (err < 0)
  		return err;
  
  	jazz16 = card->private_data;
  
  	xirq = irq[dev];
  	if (xirq == SNDRV_AUTO_IRQ) {
  		xirq = snd_legacy_find_free_irq(possible_irqs);
  		if (xirq < 0) {
  			snd_printk(KERN_ERR "unable to find a free IRQ\n");
  			err = -EBUSY;
  			goto err_free;
  		}
  	}
  	xdma8 = dma8[dev];
  	if (xdma8 == SNDRV_AUTO_DMA) {
  		xdma8 = snd_legacy_find_free_dma(possible_dmas8);
  		if (xdma8 < 0) {
  			snd_printk(KERN_ERR "unable to find a free DMA8\n");
  			err = -EBUSY;
  			goto err_free;
  		}
  	}
  	xdma16 = dma16[dev];
  	if (xdma16 == SNDRV_AUTO_DMA) {
  		xdma16 = snd_legacy_find_free_dma(possible_dmas16);
  		if (xdma16 < 0) {
  			snd_printk(KERN_ERR "unable to find a free DMA16\n");
  			err = -EBUSY;
  			goto err_free;
  		}
  	}
  
  	xmpu_port = mpu_port[dev];
  	if (xmpu_port == SNDRV_AUTO_PORT)
  		xmpu_port = 0;
  	err = jazz16_detect_board(port[dev], xmpu_port);
  	if (err < 0) {
  		printk(KERN_ERR "Media Vision Jazz16 board not detected\n");
  		goto err_free;
  	}
  	err = snd_sbdsp_create(card, port[dev], irq[dev],
  			       jazz16_interrupt,
  			       dma8[dev], dma16[dev],
  			       SB_HW_JAZZ16,
  			       &chip);
  	if (err < 0)
  		goto err_free;
  
  	xmpu_irq = mpu_irq[dev];
  	if (xmpu_irq == SNDRV_AUTO_IRQ || mpu_port[dev] == SNDRV_AUTO_PORT)
  		xmpu_irq = 0;
  	err = jazz16_configure_board(chip, xmpu_irq);
  	if (err < 0) {
  		printk(KERN_ERR "Media Vision Jazz16 configuration failed\n");
  		goto err_free;
  	}
  
  	jazz16->chip = chip;
  
  	strcpy(card->driver, "jazz16");
  	strcpy(card->shortname, "Media Vision Jazz16");
  	sprintf(card->longname,
  		"Media Vision Jazz16 at 0x%lx, irq %d, dma8 %d, dma16 %d",
  		port[dev], xirq, xdma8, xdma16);
  
  	err = snd_sb8dsp_pcm(chip, 0, NULL);
  	if (err < 0)
  		goto err_free;
  	err = snd_sbmixer_new(chip);
  	if (err < 0)
  		goto err_free;
  
  	err = snd_opl3_create(card, chip->port, chip->port + 2,
  			      OPL3_HW_AUTO, 1, &opl3);
  	if (err < 0)
  		snd_printk(KERN_WARNING "no OPL device at 0x%lx-0x%lx\n",
  			   chip->port, chip->port + 2);
  	else {
  		err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
  		if (err < 0)
  			goto err_free;
  	}
  	if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
  		if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
  			mpu_irq[dev] = -1;
  
  		if (snd_mpu401_uart_new(card, 0,
  					MPU401_HW_MPU401,
  					mpu_port[dev], 0,
  					mpu_irq[dev],
  					NULL) < 0)
  			snd_printk(KERN_ERR "no MPU-401 device at 0x%lx\n",
  					mpu_port[dev]);
  	}
  
  	snd_card_set_dev(card, devptr);
  
  	err = snd_card_register(card);
  	if (err < 0)
  		goto err_free;
  
  	dev_set_drvdata(devptr, card);
  	return 0;
  
  err_free:
  	snd_card_free(card);
  	return err;
  }
  
  static int snd_jazz16_remove(struct device *devptr, unsigned int dev)
  {
  	struct snd_card *card = dev_get_drvdata(devptr);
  
  	snd_card_free(card);
  	return 0;
  }
  
  #ifdef CONFIG_PM
  static int snd_jazz16_suspend(struct device *pdev, unsigned int n,
  			       pm_message_t state)
  {
  	struct snd_card *card = dev_get_drvdata(pdev);
  	struct snd_card_jazz16 *acard = card->private_data;
  	struct snd_sb *chip = acard->chip;
  
  	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
  	snd_pcm_suspend_all(chip->pcm);
  	snd_sbmixer_suspend(chip);
  	return 0;
  }
  
  static int snd_jazz16_resume(struct device *pdev, unsigned int n)
  {
  	struct snd_card *card = dev_get_drvdata(pdev);
  	struct snd_card_jazz16 *acard = card->private_data;
  	struct snd_sb *chip = acard->chip;
  
  	snd_sbdsp_reset(chip);
  	snd_sbmixer_resume(chip);
  	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
  	return 0;
  }
  #endif
  
  static struct isa_driver snd_jazz16_driver = {
  	.match		= snd_jazz16_match,
  	.probe		= snd_jazz16_probe,
  	.remove		= snd_jazz16_remove,
  #ifdef CONFIG_PM
  	.suspend	= snd_jazz16_suspend,
  	.resume		= snd_jazz16_resume,
  #endif
  	.driver		= {
  		.name	= "jazz16"
  	},
  };
  
  static int __init alsa_card_jazz16_init(void)
  {
  	return isa_register_driver(&snd_jazz16_driver, SNDRV_CARDS);
  }
  
  static void __exit alsa_card_jazz16_exit(void)
  {
  	isa_unregister_driver(&snd_jazz16_driver);
  }
  
  module_init(alsa_card_jazz16_init)
  module_exit(alsa_card_jazz16_exit)
  