sound/pci/cs5530.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
  *
  * 	(C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
  *	(C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
  *
  * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
  * mess with it a bit. The chip seems to have to have trouble with full duplex
  * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
  * simultaneously play back audio at 16bit 44100kHz, the device actually plays
  * back in the same format in which it is capturing. By forcing the chip to
  * always play/capture in 16/44100, we can let alsa-lib convert the samples and
  * that way we can hack up some full duplex audio.
  *
  * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
  * The older version (VSA1) provides fairly good soundblaster emulation
  * although there are a couple of bugs: large DMA buffers break record,
  * and the MPU event handling seems suspect. VSA2 allows the native driver
  * to control the AC97 audio engine directly and requires a different driver.
  *
  * Thanks to National Semiconductor for providing the needed information
  * on the XpressAudio(tm) internals.
  *
  * TO DO:
  *	Investigate whether we can portably support Cognac (5520) in the
  *	same manner.
  */

 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/sb.h>
 #include <sound/initval.h>

 MODULE_AUTHOR("Ash Willis");
 MODULE_DESCRIPTION("CS5530 Audio");
 MODULE_LICENSE("GPL");

 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;

 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
 module_param_array(id, charp, NULL, 0444);
 MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
 module_param_array(enable, bool, NULL, 0444);
 MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");

 struct snd_cs5530 {
 	struct snd_card *card;
 	struct pci_dev *pci;
 	struct snd_sb *sb;
 	unsigned long pci_base;
 };

 static const struct pci_device_id snd_cs5530_ids[] = {
 	{PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
 							PCI_ANY_ID, 0, 0},
 	{0,}
 };

 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);

 static int snd_cs5530_free(struct snd_cs5530 *chip)
 {
 	pci_release_regions(chip->pci);
 	pci_disable_device(chip->pci);
 	kfree(chip);
 	return 0;
 }

 static int snd_cs5530_dev_free(struct snd_device *device)
 {
 	struct snd_cs5530 *chip = device->device_data;
 	return snd_cs5530_free(chip);
 }

 static void snd_cs5530_remove(struct pci_dev *pci)
 {
 	snd_card_free(pci_get_drvdata(pci));
 }

 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
 {
 	outb(reg, io + 4);
 	udelay(20);
 	reg = inb(io + 5);
 	udelay(20);
 	return reg;
 }

 static int snd_cs5530_create(struct snd_card *card,
 			     struct pci_dev *pci,
 			     struct snd_cs5530 **rchip)
 {
 	struct snd_cs5530 *chip;
 	unsigned long sb_base;
 	u8 irq, dma8, dma16 = 0;
 	u16 map;
 	void __iomem *mem;
 	int err;

 	static struct snd_device_ops ops = {
 		.dev_free = snd_cs5530_dev_free,
 	};
 	*rchip = NULL;

 	err = pci_enable_device(pci);
  	if (err < 0)
 		return err;

 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 	if (chip == NULL) {
 		pci_disable_device(pci);
 		return -ENOMEM;
 	}

 	chip->card = card;
 	chip->pci = pci;

 	err = pci_request_regions(pci, "CS5530");
 	if (err < 0) {
 		kfree(chip);
 		pci_disable_device(pci);
 		return err;
 	}
 	chip->pci_base = pci_resource_start(pci, 0);

 	mem = pci_ioremap_bar(pci, 0);
 	if (mem == NULL) {
 		snd_cs5530_free(chip);
 		return -EBUSY;
 	}

 	map = readw(mem + 0x18);
 	iounmap(mem);

 	/* Map bits
 		0:1	* 0x20 + 0x200 = sb base
 		2	sb enable
 		3	adlib enable
 		5	MPU enable 0x330
 		6	MPU enable 0x300

 	   The other bits may be used internally so must be masked */

 	sb_base = 0x220 + 0x20 * (map & 3);

 	if (map & (1<<2))
 		dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
 	else {
 		dev_err(card->dev, "Could not find XpressAudio!\n");
 		snd_cs5530_free(chip);
 		return -ENODEV;
 	}

 	if (map & (1<<5))
 		dev_info(card->dev, "MPU at 0x300\n");
 	else if (map & (1<<6))
 		dev_info(card->dev, "MPU at 0x330\n");

 	irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
 	dma8 = snd_cs5530_mixer_read(sb_base, 0x81);

 	if (dma8 & 0x20)
 		dma16 = 5;
 	else if (dma8 & 0x40)
 		dma16 = 6;
 	else if (dma8 & 0x80)
 		dma16 = 7;
 	else {
 		dev_err(card->dev, "No 16bit DMA enabled\n");
 		snd_cs5530_free(chip);
 		return -ENODEV;
 	}

 	if (dma8 & 0x01)
 		dma8 = 0;
 	else if (dma8 & 02)
 		dma8 = 1;
 	else if (dma8 & 0x08)
 		dma8 = 3;
 	else {
 		dev_err(card->dev, "No 8bit DMA enabled\n");
 		snd_cs5530_free(chip);
 		return -ENODEV;
 	}

 	if (irq & 1)
 		irq = 9;
 	else if (irq & 2)
 		irq = 5;
 	else if (irq & 4)
 		irq = 7;
 	else if (irq & 8)
 		irq = 10;
 	else {
 		dev_err(card->dev, "SoundBlaster IRQ not set\n");
 		snd_cs5530_free(chip);
 		return -ENODEV;
 	}

 	dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);

 	err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
 						dma16, SB_HW_CS5530, &chip->sb);
 	if (err < 0) {
 		dev_err(card->dev, "Could not create SoundBlaster\n");
 		snd_cs5530_free(chip);
 		return err;
 	}

 	err = snd_sb16dsp_pcm(chip->sb, 0);
 	if (err < 0) {
 		dev_err(card->dev, "Could not create PCM\n");
 		snd_cs5530_free(chip);
 		return err;
 	}

 	err = snd_sbmixer_new(chip->sb);
 	if (err < 0) {
 		dev_err(card->dev, "Could not create Mixer\n");
 		snd_cs5530_free(chip);
 		return err;
 	}

 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 	if (err < 0) {
 		snd_cs5530_free(chip);
 		return err;
 	}

 	*rchip = chip;
 	return 0;
 }

 static int snd_cs5530_probe(struct pci_dev *pci,
 			    const struct pci_device_id *pci_id)
 {
 	static int dev;
 	struct snd_card *card;
 	struct snd_cs5530 *chip = NULL;
 	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 < 0)
 		return err;

 	err = snd_cs5530_create(card, pci, &chip);
 	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}

 	strcpy(card->driver, "CS5530");
 	strcpy(card->shortname, "CS5530 Audio");
 	sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);

 	err = snd_card_register(card);
 	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
 }

 static struct pci_driver cs5530_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_cs5530_ids,
 	.probe = snd_cs5530_probe,
 	.remove = snd_cs5530_remove,
 };

 module_pci_driver(cs5530_driver);
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
	*
	* (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
	* (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
	*
	* This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
	* mess with it a bit. The chip seems to have to have trouble with full duplex
	* mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
	* simultaneously play back audio at 16bit 44100kHz, the device actually plays
	* back in the same format in which it is capturing. By forcing the chip to
	* always play/capture in 16/44100, we can let alsa-lib convert the samples and
	* that way we can hack up some full duplex audio.
	*
	* XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
	* The older version (VSA1) provides fairly good soundblaster emulation
	* although there are a couple of bugs: large DMA buffers break record,
	* and the MPU event handling seems suspect. VSA2 allows the native driver
	* to control the AC97 audio engine directly and requires a different driver.
	*
	* Thanks to National Semiconductor for providing the needed information
	* on the XpressAudio(tm) internals.
	*
	* TO DO:
	* Investigate whether we can portably support Cognac (5520) in the
	* same manner.
	*/

	#include <linux/delay.h>
	#include <linux/module.h>
	#include <linux/pci.h>
	#include <linux/slab.h>
	#include <sound/core.h>
	#include <sound/sb.h>
	#include <sound/initval.h>

	MODULE_AUTHOR("Ash Willis");
	MODULE_DESCRIPTION("CS5530 Audio");
	MODULE_LICENSE("GPL");

	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;

	module_param_array(index, int, NULL, 0444);
	MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
	module_param_array(id, charp, NULL, 0444);
	MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
	module_param_array(enable, bool, NULL, 0444);
	MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");

	struct snd_cs5530 {
	struct snd_card *card;
	struct pci_dev *pci;
	struct snd_sb *sb;
	unsigned long pci_base;
	};

	static const struct pci_device_id snd_cs5530_ids[] = {
	{PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
	PCI_ANY_ID, 0, 0},
	{0,}
	};

	MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);

	static int snd_cs5530_free(struct snd_cs5530 *chip)
	{
	pci_release_regions(chip->pci);
	pci_disable_device(chip->pci);
	kfree(chip);
	return 0;
	}

	static int snd_cs5530_dev_free(struct snd_device *device)
	{
	struct snd_cs5530 *chip = device->device_data;
	return snd_cs5530_free(chip);
	}

	static void snd_cs5530_remove(struct pci_dev *pci)
	{
	snd_card_free(pci_get_drvdata(pci));
	}

	static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
	{
	outb(reg, io + 4);
	udelay(20);
	reg = inb(io + 5);
	udelay(20);
	return reg;
	}

	static int snd_cs5530_create(struct snd_card *card,
	struct pci_dev *pci,
	struct snd_cs5530 **rchip)
	{
	struct snd_cs5530 *chip;
	unsigned long sb_base;
	u8 irq, dma8, dma16 = 0;
	u16 map;
	void __iomem *mem;
	int err;

	static struct snd_device_ops ops = {
	.dev_free = snd_cs5530_dev_free,
	};
	*rchip = NULL;

	err = pci_enable_device(pci);
	if (err < 0)
	return err;

	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
	if (chip == NULL) {
	pci_disable_device(pci);
	return -ENOMEM;
	}

	chip->card = card;
	chip->pci = pci;

	err = pci_request_regions(pci, "CS5530");
	if (err < 0) {
	kfree(chip);
	pci_disable_device(pci);
	return err;
	}
	chip->pci_base = pci_resource_start(pci, 0);

	mem = pci_ioremap_bar(pci, 0);
	if (mem == NULL) {
	snd_cs5530_free(chip);
	return -EBUSY;
	}

	map = readw(mem + 0x18);
	iounmap(mem);

	/* Map bits
	0:1 * 0x20 + 0x200 = sb base
	2 sb enable
	3 adlib enable
	5 MPU enable 0x330
	6 MPU enable 0x300

	The other bits may be used internally so must be masked */

	sb_base = 0x220 + 0x20 * (map & 3);

	if (map & (1<<2))
	dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
	else {
	dev_err(card->dev, "Could not find XpressAudio!\n");
	snd_cs5530_free(chip);
	return -ENODEV;
	}

	if (map & (1<<5))
	dev_info(card->dev, "MPU at 0x300\n");
	else if (map & (1<<6))
	dev_info(card->dev, "MPU at 0x330\n");

	irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
	dma8 = snd_cs5530_mixer_read(sb_base, 0x81);

	if (dma8 & 0x20)
	dma16 = 5;
	else if (dma8 & 0x40)
	dma16 = 6;
	else if (dma8 & 0x80)
	dma16 = 7;
	else {
	dev_err(card->dev, "No 16bit DMA enabled\n");
	snd_cs5530_free(chip);
	return -ENODEV;
	}

	if (dma8 & 0x01)
	dma8 = 0;
	else if (dma8 & 02)
	dma8 = 1;
	else if (dma8 & 0x08)
	dma8 = 3;
	else {
	dev_err(card->dev, "No 8bit DMA enabled\n");
	snd_cs5530_free(chip);
	return -ENODEV;
	}

	if (irq & 1)
	irq = 9;
	else if (irq & 2)
	irq = 5;
	else if (irq & 4)
	irq = 7;
	else if (irq & 8)
	irq = 10;
	else {
	dev_err(card->dev, "SoundBlaster IRQ not set\n");
	snd_cs5530_free(chip);
	return -ENODEV;
	}

	dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);

	err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
	dma16, SB_HW_CS5530, &chip->sb);
	if (err < 0) {
	dev_err(card->dev, "Could not create SoundBlaster\n");
	snd_cs5530_free(chip);
	return err;
	}

	err = snd_sb16dsp_pcm(chip->sb, 0);
	if (err < 0) {
	dev_err(card->dev, "Could not create PCM\n");
	snd_cs5530_free(chip);
	return err;
	}

	err = snd_sbmixer_new(chip->sb);
	if (err < 0) {
	dev_err(card->dev, "Could not create Mixer\n");
	snd_cs5530_free(chip);
	return err;
	}

	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
	if (err < 0) {
	snd_cs5530_free(chip);
	return err;
	}

	*rchip = chip;
	return 0;
	}

	static int snd_cs5530_probe(struct pci_dev *pci,
	const struct pci_device_id *pci_id)
	{
	static int dev;
	struct snd_card *card;
	struct snd_cs5530 *chip = NULL;
	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 < 0)
	return err;

	err = snd_cs5530_create(card, pci, &chip);
	if (err < 0) {
	snd_card_free(card);
	return err;
	}

	strcpy(card->driver, "CS5530");
	strcpy(card->shortname, "CS5530 Audio");
	sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);

	err = snd_card_register(card);
	if (err < 0) {
	snd_card_free(card);
	return err;
	}
	pci_set_drvdata(pci, card);
	dev++;
	return 0;
	}

	static struct pci_driver cs5530_driver = {
	.name = KBUILD_MODNAME,
	.id_table = snd_cs5530_ids,
	.probe = snd_cs5530_probe,
	.remove = snd_cs5530_remove,
	};

	module_pci_driver(cs5530_driver);