ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.

Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.

Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 1038 insertions, 0 deletions

diff --git a/sound/isa/gus/interwave.c b/sound/isa/gus/interwave.c
new file mode 100644
index 000000000..115f900fa
--- /dev/null
+++ b/sound/isa/gus/interwave.c
@@ -0,0 +1,1038 @@
+// 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 snd_i2c_bus *i2c_bus;
+	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 __ro_after_init;
+static int pnp_registered __ro_after_init;
+
+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 const unsigned int snd_interwave_memory_configs[] = {
+	0x00000001, 0x00000101, 0x01010101, 0x00000401,
+	0x04040401, 0x00040101, 0x04040101, 0x00000004,
+	0x00000404, 0x04040404, 0x00000010, 0x00001010,
+	0x10101010
+};
+
+static int snd_interwave_find_memory_config(unsigned int lmct)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(snd_interwave_memory_configs); i++) {
+		if (lmct == snd_interwave_memory_configs[i])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static void snd_interwave_detect_memory(struct snd_gus_card *gus)
+{
+	int bank_pos, pages;
+	unsigned int i, lmct;
+	int lmc_cfg;
+	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
+		lmc_cfg = snd_interwave_find_memory_config(lmct);
+		if (lmc_cfg >= 0) {
+#if 0
+			dev_dbg(gus->card->dev, "found !!! %i\n", lmc_cfg);
+#endif
+			snd_gf1_write16(gus, SNDRV_GF1_GW_MEMORY_CONFIG,
+					(snd_gf1_look16(gus, SNDRV_GF1_GW_MEMORY_CONFIG) & 0xfff0) |
+					lmc_cfg);
+			snd_interwave_bank_sizes(gus, psizes);
+		} else if (!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_restore_regs(struct snd_gus_card *gus)
+{
+	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);
+}
+
+static void snd_interwave_init(int dev, struct snd_gus_card *gus)
+{
+	/* Probe-time setup also clears the timer control register. */
+	scoped_guard(spinlock_irqsave, &gus->reg_lock) {
+		snd_gf1_write8(gus, SNDRV_GF1_GB_SOUND_BLASTER_CONTROL, 0x00);
+		__snd_interwave_restore_regs(gus);
+	}
+	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;
+		iwcard->i2c_bus = i2c_bus;
+	}
+#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;
+}
+
+#ifdef CONFIG_PM
+static void snd_interwave_restore_regs(struct snd_gus_card *gus)
+{
+	scoped_guard(spinlock_irqsave, &gus->reg_lock)
+		__snd_interwave_restore_regs(gus);
+}
+
+static void snd_interwave_restore_memory(struct snd_gus_card *gus)
+{
+	unsigned short mem_cfg;
+	unsigned int lmct = 0;
+	int i, lmc_cfg;
+
+	if (!gus->gf1.memory)
+		return;
+
+	for (i = 0; i < 4; i++)
+		lmct |= (gus->gf1.mem_alloc.banks_16[i].size >> 18) << (i * 8);
+
+	lmc_cfg = snd_interwave_find_memory_config(lmct);
+	if (lmc_cfg < 0) {
+		if (!gus->gf1.enh_mode) {
+			lmc_cfg = 2;
+		} else {
+			dev_warn(gus->card->dev,
+				 "cannot restore InterWave memory layout 0x%08x\n",
+				 lmct);
+			return;
+		}
+	}
+
+	scoped_guard(spinlock_irqsave, &gus->reg_lock) {
+		mem_cfg = snd_gf1_look16(gus, SNDRV_GF1_GW_MEMORY_CONFIG);
+		mem_cfg = (mem_cfg & 0xfff0) | lmc_cfg;
+		mem_cfg = (mem_cfg & 0xff1f) | (4 << 5);
+		snd_gf1_write16(gus, SNDRV_GF1_GW_MEMORY_CONFIG, mem_cfg);
+	}
+}
+
+static int snd_interwave_card_suspend(struct snd_card *card)
+{
+	struct snd_interwave *iwcard = card->private_data;
+
+	iwcard->wss->suspend(iwcard->wss);
+	return snd_gus_suspend(iwcard->gus);
+}
+
+static int snd_interwave_card_resume(struct snd_card *card)
+{
+	struct snd_interwave *iwcard = card->private_data;
+	int err;
+
+	err = snd_gus_resume(iwcard->gus);
+	if (err < 0)
+		return err;
+
+	snd_interwave_restore_regs(iwcard->gus);
+	snd_interwave_restore_memory(iwcard->gus);
+	iwcard->wss->resume(iwcard->wss);
+#ifdef SNDRV_STB
+	if (iwcard->i2c_bus) {
+		err = snd_tea6330t_restore_mixer(iwcard->i2c_bus);
+		if (err < 0)
+			dev_warn(card->dev,
+				 "failed to restore TEA6330T mixer state: %d\n",
+				 err);
+	}
+#endif
+
+	return 0;
+}
+
+static int snd_interwave_isa_suspend(struct device *pdev, unsigned int dev,
+				     pm_message_t state)
+{
+	return snd_interwave_card_suspend(dev_get_drvdata(pdev));
+}
+
+static int snd_interwave_isa_resume(struct device *pdev, unsigned int dev)
+{
+	return snd_interwave_card_resume(dev_get_drvdata(pdev));
+}
+#endif
+
+static struct isa_driver snd_interwave_driver = {
+	.match		= snd_interwave_isa_match,
+	.probe		= snd_interwave_isa_probe,
+#ifdef CONFIG_PM
+	.suspend	= snd_interwave_isa_suspend,
+	.resume		= snd_interwave_isa_resume,
+#endif
+	.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;
+}
+
+#ifdef CONFIG_PM
+static int snd_interwave_pnpc_suspend(struct pnp_card_link *pcard,
+				      pm_message_t state)
+{
+	return snd_interwave_card_suspend(pnp_get_card_drvdata(pcard));
+}
+
+static int snd_interwave_pnpc_resume(struct pnp_card_link *pcard)
+{
+	return snd_interwave_card_resume(pnp_get_card_drvdata(pcard));
+}
+#endif
+
+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,
+#ifdef CONFIG_PM
+	.suspend	= snd_interwave_pnpc_suspend,
+	.resume		= snd_interwave_pnpc_resume,
+#endif
+};
+
+#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)