// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Driver for AMD InterWave soundcard
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *   1999/07/22		Erik Inge Bolso <knan@mo.himolde.no>
 *			* mixer group handlers
 */

#include <linux/init.h>
#include <linux/err.h>
#include <linux/isa.h>
#include <linux/delay.h>
#include <linux/pnp.h>
#include <linux/module.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/wss.h>
#ifdef SNDRV_STB
#include <sound/tea6330t.h>
#endif
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_LICENSE("GPL");
#ifndef SNDRV_STB
MODULE_DESCRIPTION("AMD InterWave");
#else
MODULE_DESCRIPTION("AMD InterWave STB with TEA6330T");
#endif

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 */
#ifdef CONFIG_PNP
static bool isapnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
#endif
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x210,0x220,0x230,0x240,0x250,0x260 */
#ifdef SNDRV_STB
static long port_tc[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* 0x350,0x360,0x370,0x380 */
#endif
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* 2,3,5,9,11,12,15 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0,1,3,5,6,7 */
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;	/* 0,1,3,5,6,7 */
static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
				/* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
static int midi[SNDRV_CARDS];
static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
static int effect[SNDRV_CARDS];

#ifdef SNDRV_STB
#define INTERWAVE_DRIVER	"snd_interwave_stb"
#define INTERWAVE_PNP_DRIVER	"interwave-stb"
#else
#define INTERWAVE_DRIVER	"snd_interwave"
#define INTERWAVE_PNP_DRIVER	"interwave"
#endif

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for InterWave soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for InterWave soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable InterWave soundcard.");
#ifdef CONFIG_PNP
module_param_array(isapnp, bool, NULL, 0444);
MODULE_PARM_DESC(isapnp, "ISA PnP detection for specified soundcard.");
#endif
module_param_hw_array(port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for InterWave driver.");
#ifdef SNDRV_STB
module_param_hw_array(port_tc, long, ioport, NULL, 0444);
MODULE_PARM_DESC(port_tc, "Tone control (TEA6330T - i2c bus) port # for InterWave driver.");
#endif
module_param_hw_array(irq, int, irq, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for InterWave driver.");
module_param_hw_array(dma1, int, dma, NULL, 0444);
MODULE_PARM_DESC(dma1, "DMA1 # for InterWave driver.");
module_param_hw_array(dma2, int, dma, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA2 # for InterWave driver.");
module_param_array(joystick_dac, int, NULL, 0444);
MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for InterWave driver.");
module_param_array(midi, int, NULL, 0444);
MODULE_PARM_DESC(midi, "MIDI UART enable for InterWave driver.");
module_param_array(pcm_channels, int, NULL, 0444);
MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for InterWave driver.");
module_param_array(effect, int, NULL, 0444);
MODULE_PARM_DESC(effect, "Effects enable for InterWave driver.");

struct snd_interwave {
	int irq;
	struct snd_card *card;
	struct snd_gus_card *gus;
	struct snd_wss *wss;
#ifdef SNDRV_STB
	struct resource *i2c_res;
#endif
	unsigned short gus_status_reg;
	unsigned short pcm_status_reg;
#ifdef CONFIG_PNP
	struct pnp_dev *dev;
#ifdef SNDRV_STB
	struct pnp_dev *devtc;
#endif
#endif
};


#ifdef CONFIG_PNP
static int isa_registered;
static int pnp_registered;

static const struct pnp_card_device_id snd_interwave_pnpids[] = {
#ifndef SNDRV_STB
	/* Gravis UltraSound Plug & Play */
	{ .id = "GRV0001", .devs = { { .id = "GRV0000" } } },
	/* STB SoundRage32 */
	{ .id = "STB011a", .devs = { { .id = "STB0010" } } },
	/* MED3210 */
	{ .id = "DXP3201", .devs = { { .id = "DXP0010" } } },
	/* Dynasonic Pro */
	/* This device also have CDC1117:DynaSonix Pro Audio Effects Processor */
	{ .id = "CDC1111", .devs = { { .id = "CDC1112" } } },
	/* Panasonic PCA761AW Audio Card */
	{ .id = "ADV55ff", .devs = { { .id = "ADV0010" } } },
	/* InterWave STB without TEA6330T */
	{ .id = "ADV550a", .devs = { { .id = "ADV0010" } } },
#else
	/* InterWave STB with TEA6330T */
	{ .id = "ADV550a", .devs = { { .id = "ADV0010" }, { .id = "ADV0015" } } },
#endif
	{ .id = "" }
};

MODULE_DEVICE_TABLE(pnp_card, snd_interwave_pnpids);

#endif /* CONFIG_PNP */


#ifdef SNDRV_STB
static void snd_interwave_i2c_setlines(struct snd_i2c_bus *bus, int ctrl, int data)
{
	unsigned long port = bus->private_value;

#if 0
	dev_dbg(bus->card->dev, "i2c_setlines - 0x%lx <- %i,%i\n", port, ctrl, data);
#endif
	outb((data << 1) | ctrl, port);
	udelay(10);
}

static int snd_interwave_i2c_getclockline(struct snd_i2c_bus *bus)
{
	unsigned long port = bus->private_value;
	unsigned char res;

	res = inb(port) & 1;
#if 0
	dev_dbg(bus->card->dev, "i2c_getclockline - 0x%lx -> %i\n", port, res);
#endif
	return res;
}

static int snd_interwave_i2c_getdataline(struct snd_i2c_bus *bus, int ack)
{
	unsigned long port = bus->private_value;
	unsigned char res;

	if (ack)
		udelay(10);
	res = (inb(port) & 2) >> 1;
#if 0
	dev_dbg(bus->card->dev, "i2c_getdataline - 0x%lx -> %i\n", port, res);
#endif
	return res;
}

static struct snd_i2c_bit_ops snd_interwave_i2c_bit_ops = {
	.setlines = snd_interwave_i2c_setlines,
	.getclock = snd_interwave_i2c_getclockline,
	.getdata  = snd_interwave_i2c_getdataline,
};

static int snd_interwave_detect_stb(struct snd_interwave *iwcard,
				    struct snd_gus_card *gus, int dev,
				    struct snd_i2c_bus **rbus)
{
	unsigned long port;
	struct snd_i2c_bus *bus;
	struct snd_card *card = iwcard->card;
	char name[32];
	int err;

	*rbus = NULL;
	port = port_tc[dev];
	if (port == SNDRV_AUTO_PORT) {
		port = 0x350;
		if (gus->gf1.port == 0x250) {
			port = 0x360;
		}
		while (port <= 0x380) {
			iwcard->i2c_res = devm_request_region(card->dev, port, 1,
							      "InterWave (I2C bus)");
			if (iwcard->i2c_res)
				break;
			port += 0x10;
		}
	} else {
		iwcard->i2c_res = devm_request_region(card->dev, port, 1,
						      "InterWave (I2C bus)");
	}
	if (iwcard->i2c_res == NULL) {
		dev_err(card->dev, "interwave: can't grab i2c bus port\n");
		return -ENODEV;
	}

	sprintf(name, "InterWave-%i", card->number);
	err = snd_i2c_bus_create(card, name, NULL, &bus);
	if (err < 0)
		return err;
	bus->private_value = port;
	bus->hw_ops.bit = &snd_interwave_i2c_bit_ops;
	err = snd_tea6330t_detect(bus, 0);
	if (err < 0)
		return err;
	*rbus = bus;
	return 0;
}
#endif

static int snd_interwave_detect(struct snd_interwave *iwcard,
				struct snd_gus_card *gus,
				int dev
#ifdef SNDRV_STB
				, struct snd_i2c_bus **rbus
#endif
				          )
{
	unsigned char rev1, rev2;
	int d;

	snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 0);	/* reset GF1 */
	d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET);
	if ((d & 0x07) != 0) {
		dev_dbg(gus->card->dev, "[0x%lx] check 1 failed - 0x%x\n", gus->gf1.port, d);
		return -ENODEV;
	}
	udelay(160);
	snd_gf1_i_write8(gus, SNDRV_GF1_GB_RESET, 1);	/* release reset */
	udelay(160);
	d = snd_gf1_i_look8(gus, SNDRV_GF1_GB_RESET);
	if ((d & 0x07) != 1) {
		dev_dbg(gus->card->dev, "[0x%lx] check 2 failed - 0x%x\n", gus->gf1.port, d);
		return -ENODEV;
	}
	scoped_guard(spinlock_irqsave, &gus->reg_lock) {
		rev1 = snd_gf1_look8(gus, SNDRV_GF1_GB_VERSION_NUMBER);
		snd_gf1_write8(gus, SNDRV_GF1_GB_VERSION_NUMBER, ~rev1);
		rev2 = snd_gf1_look8(gus, SNDRV_GF1_GB_VERSION_NUMBER);
		snd_gf1_write8(gus, SNDRV_GF1_GB_VERSION_NUMBER, rev1);
	}
	dev_dbg(gus->card->dev,
		"[0x%lx] InterWave check - rev1=0x%x, rev2=0x%x\n",
		gus->gf1.port, rev1, rev2);
	if ((rev1 & 0xf0) == (rev2 & 0xf0) &&
	    (rev1 & 0x0f) != (rev2 & 0x0f)) {
		dev_dbg(gus->card->dev,
			"[0x%lx] InterWave check - passed\n", gus->gf1.port);
		gus->interwave = 1;
		strscpy(gus->card->shortname, "AMD InterWave");
		gus->revision = rev1 >> 4;
#ifndef SNDRV_STB
		return 0;	/* ok.. We have an InterWave board */
#else
		return snd_interwave_detect_stb(iwcard, gus, dev, rbus);
#endif
	}
	dev_dbg(gus->card->dev, "[0x%lx] InterWave check - failed\n", gus->gf1.port);
	return -ENODEV;
}

static irqreturn_t snd_interwave_interrupt(int irq, void *dev_id)
{
	struct snd_interwave *iwcard = dev_id;
	int loop, max = 5;
	int handled = 0;

	do {
		loop = 0;
		if (inb(iwcard->gus_status_reg)) {
			handled = 1;
			snd_gus_interrupt(irq, iwcard->gus);
			loop++;
		}
		if (inb(iwcard->pcm_status_reg) & 0x01) {	/* IRQ bit is set? */
			handled = 1;
			snd_wss_interrupt(irq, iwcard->wss);
			loop++;
		}
	} while (loop && --max > 0);
	return IRQ_RETVAL(handled);
}

static void snd_interwave_reset(struct snd_gus_card *gus)
{
	snd_gf1_write8(gus, SNDRV_GF1_GB_RESET, 0x00);
	udelay(160);
	snd_gf1_write8(gus, SNDRV_GF1_GB_RESET, 0x01);
	udelay(160);
}

static void snd_interwave_bank_sizes(struct snd_gus_card *gus, int *sizes)
{
	unsigned int idx;
	unsigned int local;
	unsigned char d;

	for (idx = 0; idx < 4; idx++) {
		sizes[idx] = 0;
		d = 0x55;
		for (local = idx << 22;
		     local < (idx << 22) + 0x400000;
		     local += 0x40000, d++) {
			snd_gf1_poke(gus, local, d);
			snd_gf1_poke(gus, local + 1, d + 1);
#if 0
			dev_dbg(gus->card->dev, "d = 0x%x, local = 0x%x, "
			       "local + 1 = 0x%x, idx << 22 = 0x%x\n",
			       d,
			       snd_gf1_peek(gus, local),
			       snd_gf1_peek(gus, local + 1),
			       snd_gf1_peek(gus, idx << 22));
#endif
			if (snd_gf1_peek(gus, local) != d ||
			    snd_gf1_peek(gus, local + 1) != d + 1 ||
			    snd_gf1_peek(gus, idx << 22) != 0x55)
				break;
			sizes[idx]++;
		}
	}
#if 0
	dev_dbg(gus->card->dev, "sizes: %i %i %i %i\n",
	       sizes[0], sizes[1], sizes[2], sizes[3]);
#endif
}

struct rom_hdr {
	/* 000 */ unsigned char iwave[8];
	/* 008 */ unsigned char rom_hdr_revision;
	/* 009 */ unsigned char series_number;
	/* 010 */ unsigned char series_name[16];
	/* 026 */ unsigned char date[10];
	/* 036 */ unsigned short vendor_revision_major;
	/* 038 */ unsigned short vendor_revision_minor;
	/* 040 */ unsigned int rom_size;
	/* 044 */ unsigned char copyright[128];
	/* 172 */ unsigned char vendor_name[64];
	/* 236 */ unsigned char rom_description[128];
	/* 364 */ unsigned char pad[147];
	/* 511 */ unsigned char csum;
};

static void snd_interwave_detect_memory(struct snd_gus_card *gus)
{
	static const unsigned int lmc[13] =
	{
		0x00000001, 0x00000101, 0x01010101, 0x00000401,
		0x04040401, 0x00040101, 0x04040101, 0x00000004,
		0x00000404, 0x04040404, 0x00000010, 0x00001010,
		0x10101010
	};

	int bank_pos, pages;
	unsigned int i, lmct;
	int psizes[4];
	unsigned char iwave[8];
	unsigned char csum;

	snd_interwave_reset(gus);
	snd_gf1_write8(gus, SNDRV_GF1_GB_GLOBAL_MODE, snd_gf1_read8(gus, SNDRV_GF1_GB_GLOBAL_MODE) | 0x01);		/* enhanced mode */
	snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);	/* DRAM I/O cycles selected */
	snd_gf1_write16(gus, SNDRV_GF1_GW_MEMORY_CONFIG, (snd_gf1_look16(gus, SNDRV_GF1_GW_MEMORY_CONFIG) & 0xff10) | 0x004c);
	/* ok.. simple test of memory size */
	pages = 0;
	snd_gf1_poke(gus, 0, 0x55);
	snd_gf1_poke(gus, 1, 0xaa);
#if 1
	if (snd_gf1_peek(gus, 0) == 0x55 && snd_gf1_peek(gus, 1) == 0xaa)
#else
	if (0)			/* ok.. for testing of 0k RAM */
#endif
	{
		snd_interwave_bank_sizes(gus, psizes);
		lmct = (psizes[3] << 24) | (psizes[2] << 16) |
		    (psizes[1] << 8) | psizes[0];
#if 0
		dev_dbg(gus->card->dev, "lmct = 0x%08x\n", lmct);
#endif
		for (i = 0; i < ARRAY_SIZE(lmc); i++)
			if (lmct == lmc[i]) {
#if 0
				dev_dbg(gus->card->dev, "found !!! %i\n", i);
#endif
				snd_gf1_write16(gus, SNDRV_GF1_GW_MEMORY_CONFIG, (snd_gf1_look16(gus, SNDRV_GF1_GW_MEMORY_CONFIG) & 0xfff0) | i);
				snd_interwave_bank_sizes(gus, psizes);
				break;
			}
		if (i >= ARRAY_SIZE(lmc) && !gus->gf1.enh_mode)
			 snd_gf1_write16(gus, SNDRV_GF1_GW_MEMORY_CONFIG, (snd_gf1_look16(gus, SNDRV_GF1_GW_MEMORY_CONFIG) & 0xfff0) | 2);
		for (i = 0; i < 4; i++) {
			gus->gf1.mem_alloc.banks_8[i].address =
			    gus->gf1.mem_alloc.banks_16[i].address = i << 22;
			gus->gf1.mem_alloc.banks_8[i].size =
			    gus->gf1.mem_alloc.banks_16[i].size = psizes[i] << 18;
			pages += psizes[i];
		}
	}
	pages <<= 18;
	gus->gf1.memory = pages;

	snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x03);	/* select ROM */
	snd_gf1_write16(gus, SNDRV_GF1_GW_MEMORY_CONFIG, (snd_gf1_look16(gus, SNDRV_GF1_GW_MEMORY_CONFIG) & 0xff1f) | (4 << 5));
	gus->gf1.rom_banks = 0;
	gus->gf1.rom_memory = 0;
	for (bank_pos = 0; bank_pos < 16L * 1024L * 1024L; bank_pos += 4L * 1024L * 1024L) {
		for (i = 0; i < 8; ++i)
			iwave[i] = snd_gf1_peek(gus, bank_pos + i);
		if (strncmp(iwave, "INTRWAVE", 8))
			continue;	/* first check */
		csum = 0;
		for (i = 0; i < sizeof(struct rom_hdr); i++)
			csum += snd_gf1_peek(gus, bank_pos + i);
		if (csum != 0)
			continue;	/* not valid rom */
		gus->gf1.rom_banks++;
		gus->gf1.rom_present |= 1 << (bank_pos >> 22);
		gus->gf1.rom_memory = snd_gf1_peek(gus, bank_pos + 40) |
				     (snd_gf1_peek(gus, bank_pos + 41) << 8) |
				     (snd_gf1_peek(gus, bank_pos + 42) << 16) |
				     (snd_gf1_peek(gus, bank_pos + 43) << 24);
	}
#if 0
	if (gus->gf1.rom_memory > 0) {
		if (gus->gf1.rom_banks == 1 && gus->gf1.rom_present == 8)
			gus->card->type = SNDRV_CARD_TYPE_IW_DYNASONIC;
	}
#endif
	snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x00);	/* select RAM */

	if (!gus->gf1.enh_mode)
		snd_interwave_reset(gus);
}

static void snd_interwave_init(int dev, struct snd_gus_card *gus)
{
	/* ok.. some InterWave specific initialization */
	scoped_guard(spinlock_irqsave, &gus->reg_lock) {
		snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, 0x00);
		snd_gf1_write8(gus, SNDRV_GF1_GB_COMPATIBILITY, 0x1f);
		snd_gf1_write8(gus, SNDRV_GF1_GB_DECODE_CONTROL, 0x49);
		snd_gf1_write8(gus, SNDRV_GF1_GB_VERSION_NUMBER, 0x11);
		snd_gf1_write8(gus, SNDRV_GF1_GB_MPU401_CONTROL_A, 0x00);
		snd_gf1_write8(gus, SNDRV_GF1_GB_MPU401_CONTROL_B, 0x30);
		snd_gf1_write8(gus, SNDRV_GF1_GB_EMULATION_IRQ, 0x00);
	}
	gus->equal_irq = 1;
	gus->codec_flag = 1;
	gus->interwave = 1;
	gus->max_flag = 1;
	gus->joystick_dac = joystick_dac[dev];

}

static const struct snd_kcontrol_new snd_interwave_controls[] = {
WSS_DOUBLE("Master Playback Switch", 0,
		CS4231_LINE_LEFT_OUTPUT, CS4231_LINE_RIGHT_OUTPUT, 7, 7, 1, 1),
WSS_DOUBLE("Master Playback Volume", 0,
		CS4231_LINE_LEFT_OUTPUT, CS4231_LINE_RIGHT_OUTPUT, 0, 0, 31, 1),
WSS_DOUBLE("Mic Playback Switch", 0,
		CS4231_LEFT_MIC_INPUT, CS4231_RIGHT_MIC_INPUT, 7, 7, 1, 1),
WSS_DOUBLE("Mic Playback Volume", 0,
		CS4231_LEFT_MIC_INPUT, CS4231_RIGHT_MIC_INPUT, 0, 0, 31, 1)
};

static int snd_interwave_mixer(struct snd_wss *chip)
{
	struct snd_card *card = chip->card;
	struct snd_ctl_elem_id id1, id2;
	unsigned int idx;
	int err;

	memset(&id1, 0, sizeof(id1));
	memset(&id2, 0, sizeof(id2));
	id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
#if 0
	/* remove mono microphone controls */
	strscpy(id1.name, "Mic Playback Switch");
	err = snd_ctl_remove_id(card, &id1);
	if (err < 0)
		return err;
	strscpy(id1.name, "Mic Playback Volume");
	err = snd_ctl_remove_id(card, &id1);
	if (err < 0)
		return err;
#endif
	/* add new master and mic controls */
	for (idx = 0; idx < ARRAY_SIZE(snd_interwave_controls); idx++) {
		err = snd_ctl_add(card, snd_ctl_new1(&snd_interwave_controls[idx], chip));
		if (err < 0)
			return err;
	}
	snd_wss_out(chip, CS4231_LINE_LEFT_OUTPUT, 0x9f);
	snd_wss_out(chip, CS4231_LINE_RIGHT_OUTPUT, 0x9f);
	snd_wss_out(chip, CS4231_LEFT_MIC_INPUT, 0x9f);
	snd_wss_out(chip, CS4231_RIGHT_MIC_INPUT, 0x9f);
	/* reassign AUXA to SYNTHESIZER */
	strscpy(id1.name, "Aux Playback Switch");
	strscpy(id2.name, "Synth Playback Switch");
	err = snd_ctl_rename_id(card, &id1, &id2);
	if (err < 0)
		return err;
	strscpy(id1.name, "Aux Playback Volume");
	strscpy(id2.name, "Synth Playback Volume");
	err = snd_ctl_rename_id(card, &id1, &id2);
	if (err < 0)
		return err;
	/* reassign AUXB to CD */
	strscpy(id1.name, "Aux Playback Switch"); id1.index = 1;
	strscpy(id2.name, "CD Playback Switch");
	err = snd_ctl_rename_id(card, &id1, &id2);
	if (err < 0)
		return err;
	strscpy(id1.name, "Aux Playback Volume");
	strscpy(id2.name, "CD Playback Volume");
	err = snd_ctl_rename_id(card, &id1, &id2);
	if (err < 0)
		return err;
	return 0;
}

#ifdef CONFIG_PNP

static int snd_interwave_pnp(int dev, struct snd_interwave *iwcard,
			     struct pnp_card_link *card,
			     const struct pnp_card_device_id *id)
{
	struct pnp_dev *pdev;
	int err;

	iwcard->dev = pnp_request_card_device(card, id->devs[0].id, NULL);
	if (iwcard->dev == NULL)
		return -EBUSY;

#ifdef SNDRV_STB
	iwcard->devtc = pnp_request_card_device(card, id->devs[1].id, NULL);
	if (iwcard->devtc == NULL)
		return -EBUSY;
#endif
	/* Synth & Codec initialization */
	pdev = iwcard->dev;

	err = pnp_activate_dev(pdev);
	if (err < 0) {
		dev_err(&pdev->dev, "InterWave PnP configure failure (out of resources?)\n");
		return err;
	}
	if (pnp_port_start(pdev, 0) + 0x100 != pnp_port_start(pdev, 1) ||
	    pnp_port_start(pdev, 0) + 0x10c != pnp_port_start(pdev, 2)) {
		dev_err(&pdev->dev, "PnP configure failure (wrong ports)\n");
		return -ENOENT;
	}
	port[dev] = pnp_port_start(pdev, 0);
	dma1[dev] = pnp_dma(pdev, 0);
	if (dma2[dev] >= 0)
		dma2[dev] = pnp_dma(pdev, 1);
	irq[dev] = pnp_irq(pdev, 0);
	dev_dbg(&pdev->dev,
		"isapnp IW: sb port=0x%llx, gf1 port=0x%llx, codec port=0x%llx\n",
		(unsigned long long)pnp_port_start(pdev, 0),
		(unsigned long long)pnp_port_start(pdev, 1),
		(unsigned long long)pnp_port_start(pdev, 2));
	dev_dbg(&pdev->dev,
		"isapnp IW: dma1=%i, dma2=%i, irq=%i\n",
		dma1[dev], dma2[dev], irq[dev]);
#ifdef SNDRV_STB
	/* Tone Control initialization */
	pdev = iwcard->devtc;

	err = pnp_activate_dev(pdev);
	if (err < 0) {
		dev_err(&pdev->dev,
			"InterWave ToneControl PnP configure failure (out of resources?)\n");
		return err;
	}
	port_tc[dev] = pnp_port_start(pdev, 0);
	dev_dbg(&pdev->dev, "isapnp IW: tone control port=0x%lx\n", port_tc[dev]);
#endif
	return 0;
}
#endif /* CONFIG_PNP */

static int snd_interwave_card_new(struct device *pdev, int dev,
				  struct snd_card **cardp)
{
	struct snd_card *card;
	struct snd_interwave *iwcard;
	int err;

	err = snd_devm_card_new(pdev, index[dev], id[dev], THIS_MODULE,
				sizeof(struct snd_interwave), &card);
	if (err < 0)
		return err;
	iwcard = card->private_data;
	iwcard->card = card;
	iwcard->irq = -1;
	*cardp = card;
	return 0;
}

static int snd_interwave_probe_gus(struct snd_card *card, int dev,
				   struct snd_gus_card **gusp)
{
	return snd_gus_create(card, port[dev], -irq[dev], dma1[dev], dma2[dev],
			      0, 32, pcm_channels[dev], effect[dev], gusp);
}

static int snd_interwave_probe(struct snd_card *card, int dev,
			       struct snd_gus_card *gus)
{
	int xirq, xdma1, xdma2;
	struct snd_interwave *iwcard = card->private_data;
	struct snd_wss *wss;
#ifdef SNDRV_STB
	struct snd_i2c_bus *i2c_bus;
#endif
	char *str;
	int err;

	xirq = irq[dev];
	xdma1 = dma1[dev];
	xdma2 = dma2[dev];

	err = snd_interwave_detect(iwcard, gus, dev
#ifdef SNDRV_STB
				   , &i2c_bus
#endif
				   );
	if (err < 0)
		return err;

	iwcard->gus_status_reg = gus->gf1.reg_irqstat;
	iwcard->pcm_status_reg = gus->gf1.port + 0x10c + 2;

	snd_interwave_init(dev, gus);
	snd_interwave_detect_memory(gus);
	err = snd_gus_initialize(gus);
	if (err < 0)
		return err;

	if (devm_request_irq(card->dev, xirq, snd_interwave_interrupt, 0,
			     "InterWave", iwcard)) {
		dev_err(card->dev, "unable to grab IRQ %d\n", xirq);
		return -EBUSY;
	}
	iwcard->irq = xirq;
	card->sync_irq = iwcard->irq;

	err = snd_wss_create(card,
			     gus->gf1.port + 0x10c, -1, xirq,
			     xdma2 < 0 ? xdma1 : xdma2, xdma1,
			     WSS_HW_INTERWAVE,
			     WSS_HWSHARE_IRQ |
			     WSS_HWSHARE_DMA1 |
			     WSS_HWSHARE_DMA2,
			     &wss);
	if (err < 0)
		return err;

	err = snd_wss_pcm(wss, 0);
	if (err < 0)
		return err;

	sprintf(wss->pcm->name + strlen(wss->pcm->name), " rev %c",
		gus->revision + 'A');
	strcat(wss->pcm->name, " (codec)");

	err = snd_wss_timer(wss, 2);
	if (err < 0)
		return err;

	err = snd_wss_mixer(wss);
	if (err < 0)
		return err;

	if (pcm_channels[dev] > 0) {
		err = snd_gf1_pcm_new(gus, 1, 1);
		if (err < 0)
			return err;
	}
	err = snd_interwave_mixer(wss);
	if (err < 0)
		return err;

#ifdef SNDRV_STB
	{
		struct snd_ctl_elem_id id1, id2;
		memset(&id1, 0, sizeof(id1));
		memset(&id2, 0, sizeof(id2));
		id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
		strscpy(id1.name, "Master Playback Switch");
		strscpy(id2.name, id1.name);
		id2.index = 1;
		err = snd_ctl_rename_id(card, &id1, &id2);
		if (err < 0)
			return err;
		strscpy(id1.name, "Master Playback Volume");
		strscpy(id2.name, id1.name);
		err = snd_ctl_rename_id(card, &id1, &id2);
		if (err < 0)
			return err;
		err = snd_tea6330t_update_mixer(card, i2c_bus, 0, 1);
		if (err < 0)
			return err;
	}
#endif

	gus->uart_enable = midi[dev];
	err = snd_gf1_rawmidi_new(gus, 0);
	if (err < 0)
		return err;

#ifndef SNDRV_STB
	str = "AMD InterWave";
	if (gus->gf1.rom_banks == 1 && gus->gf1.rom_present == 8)
		str = "Dynasonic 3-D";
#else
	str = "InterWave STB";
#endif
	strscpy(card->driver, str);
	strscpy(card->shortname, str);
	sprintf(card->longname, "%s at 0x%lx, irq %i, dma %d",
		str,
		gus->gf1.port,
		xirq,
		xdma1);
	if (xdma2 >= 0)
		sprintf(card->longname + strlen(card->longname), "&%d", xdma2);

	err = snd_card_register(card);
	if (err < 0)
		return err;
	
	iwcard->wss = wss;
	iwcard->gus = gus;
	return 0;
}

static int snd_interwave_isa_match(struct device *pdev,
				   unsigned int dev)
{
	if (!enable[dev])
		return 0;
#ifdef CONFIG_PNP
	if (isapnp[dev])
		return 0;
#endif
	return 1;
}

static int snd_interwave_isa_probe(struct device *pdev,
				   unsigned int dev)
{
	struct snd_card *card;
	struct snd_gus_card *gus;
	int err;
	static const int possible_irqs[] = {5, 11, 12, 9, 7, 15, 3, -1};
	static const int possible_dmas[] = {0, 1, 3, 5, 6, 7, -1};

	if (irq[dev] == SNDRV_AUTO_IRQ) {
		irq[dev] = snd_legacy_find_free_irq(possible_irqs);
		if (irq[dev] < 0) {
			dev_err(pdev, "unable to find a free IRQ\n");
			return -EBUSY;
		}
	}
	if (dma1[dev] == SNDRV_AUTO_DMA) {
		dma1[dev] = snd_legacy_find_free_dma(possible_dmas);
		if (dma1[dev] < 0) {
			dev_err(pdev, "unable to find a free DMA1\n");
			return -EBUSY;
		}
	}
	if (dma2[dev] == SNDRV_AUTO_DMA) {
		dma2[dev] = snd_legacy_find_free_dma(possible_dmas);
		if (dma2[dev] < 0) {
			dev_err(pdev, "unable to find a free DMA2\n");
			return -EBUSY;
		}
	}

	err = snd_interwave_card_new(pdev, dev, &card);
	if (err < 0)
		return err;

	if (port[dev] != SNDRV_AUTO_PORT)
		err = snd_interwave_probe_gus(card, dev, &gus);
	else {
		static const long possible_ports[] = {0x210, 0x220, 0x230, 0x240, 0x250, 0x260};
		int i;
		for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
			port[dev] = possible_ports[i];
			err = snd_interwave_probe_gus(card, dev, &gus);
			if (! err)
				return 0;
		}
	}
	if (err < 0)
		return err;

	err = snd_interwave_probe(card, dev, gus);
	if (err < 0)
		return err;

	dev_set_drvdata(pdev, card);
	return 0;
}

static struct isa_driver snd_interwave_driver = {
	.match		= snd_interwave_isa_match,
	.probe		= snd_interwave_isa_probe,
	/* FIXME: suspend,resume */
	.driver		= {
		.name	= INTERWAVE_DRIVER
	},
};

#ifdef CONFIG_PNP
static int snd_interwave_pnp_detect(struct pnp_card_link *pcard,
				    const struct pnp_card_device_id *pid)
{
	static int dev;
	struct snd_card *card;
	struct snd_gus_card *gus;
	int res;

	for ( ; dev < SNDRV_CARDS; dev++) {
		if (enable[dev] && isapnp[dev])
			break;
	}
	if (dev >= SNDRV_CARDS)
		return -ENODEV;
				
	res = snd_interwave_card_new(&pcard->card->dev, dev, &card);
	if (res < 0)
		return res;

	res = snd_interwave_pnp(dev, card->private_data, pcard, pid);
	if (res < 0)
		return res;
	res = snd_interwave_probe_gus(card, dev, &gus);
	if (res < 0)
		return res;
	res = snd_interwave_probe(card, dev, gus);
	if (res < 0)
		return res;
	pnp_set_card_drvdata(pcard, card);
	dev++;
	return 0;
}

static struct pnp_card_driver interwave_pnpc_driver = {
	.flags = PNP_DRIVER_RES_DISABLE,
	.name = INTERWAVE_PNP_DRIVER,
	.id_table = snd_interwave_pnpids,
	.probe = snd_interwave_pnp_detect,
	/* FIXME: suspend,resume */
};

#endif /* CONFIG_PNP */

static int __init alsa_card_interwave_init(void)
{
	int err;

	err = isa_register_driver(&snd_interwave_driver, SNDRV_CARDS);
#ifdef CONFIG_PNP
	if (!err)
		isa_registered = 1;

	err = pnp_register_card_driver(&interwave_pnpc_driver);
	if (!err)
		pnp_registered = 1;

	if (isa_registered)
		err = 0;
#endif
	return err;
}

static void __exit alsa_card_interwave_exit(void)
{
#ifdef CONFIG_PNP
	if (pnp_registered)
		pnp_unregister_card_driver(&interwave_pnpc_driver);
	if (isa_registered)
#endif
		isa_unregister_driver(&snd_interwave_driver);
}

module_init(alsa_card_interwave_init)
module_exit(alsa_card_interwave_exit)