ALSA: introduce snd-cmi8328: C-Media CMI8328 driver

Introduce snd-cmi8328 driver for C-Media CMI8328-based sound cards, such as
AudioExcel AV500.

It supports PCM playback and capture (full-duplex) through wss_lib, gameport,
OPL3 and MPU401. The AV500 card has onboard Dream wavetable synth connected
to the MPU401 port and Aux 1 input internally which works too.
The CDROM interface is not supported (as the drivers for these CDROMs were
removed from the kernel some time ago).

A separate driver is needed because CMI8328 is completely different chip to
CMI8329/CMI8330. It's configured by magic registers (there's no PnP). Sound is
provided by a real WSS codec (CS4231A) and the SB part is just a SB Pro
emulation (for DOS games, useless for Linux).

When SB is enabled, the CMI8328 chip disables access to the WSS codec,
emulates SoundBlaster on one side and outputs sound data to the codec - so SB
and WSS can't work together with this card. The WSS codec can do full duplex
by itself so there's no need for crazy things like snd-cmi8330 does
(combining SB and WSS parts into one driver).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 496 insertions, 0 deletions

diff --git a/sound/isa/Kconfig b/sound/isa/Kconfig
index 52064cf..a38d964 100644
--- a/sound/isa/Kconfig
+++ b/sound/isa/Kconfig
@@ -117,6 +117,18 @@ config SND_AZT2320
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-azt2320.
 
+config SND_CMI8328
+	tristate "C-Media CMI8328"
+	select SND_WSS_LIB
+	select SND_OPL3_LIB
+	select SND_MPU401_UART
+	help
+	  Say Y here to include support for soundcards based on the
+	  C-Media CMI8328 chip.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-cmi8328.
+
 config SND_CMI8330
 	tristate "C-Media CMI8330"
 	select SND_WSS_LIB
diff --git a/sound/isa/Makefile b/sound/isa/Makefile
index 8d781e4..9a15f14 100644
--- a/sound/isa/Makefile
+++ b/sound/isa/Makefile
@@ -6,6 +6,7 @@
 snd-adlib-objs := adlib.o
 snd-als100-objs := als100.o
 snd-azt2320-objs := azt2320.o
+snd-cmi8328-objs := cmi8328.o
 snd-cmi8330-objs := cmi8330.o
 snd-es18xx-objs := es18xx.o
 snd-opl3sa2-objs := opl3sa2.o
@@ -16,6 +17,7 @@ snd-sscape-objs := sscape.o
 obj-$(CONFIG_SND_ADLIB) += snd-adlib.o
 obj-$(CONFIG_SND_ALS100) += snd-als100.o
 obj-$(CONFIG_SND_AZT2320) += snd-azt2320.o
+obj-$(CONFIG_SND_CMI8328) += snd-cmi8328.o
 obj-$(CONFIG_SND_CMI8330) += snd-cmi8330.o
 obj-$(CONFIG_SND_ES18XX) += snd-es18xx.o
 obj-$(CONFIG_SND_OPL3SA2) += snd-opl3sa2.o
diff --git a/sound/isa/cmi8328.c b/sound/isa/cmi8328.c
new file mode 100644
index 0000000..aefafff
--- /dev/null
+++ b/sound/isa/cmi8328.c
@@ -0,0 +1,482 @@
+/*
+ * Driver for C-Media CMI8328-based soundcards, such as AudioExcel AV500
+ * Copyright (c) 2012 Ondrej Zary
+ *
+ * AudioExcel AV500 card consists of:
+ *  - CMI8328 - main chip (SB Pro emulation, gameport, OPL3, MPU401, CD-ROM)
+ *  - CS4231A - WSS codec
+ *  - Dream SAM9233+GMS950400+RAM+ROM: Wavetable MIDI, connected to MPU401
+ */
+
+#include <linux/init.h>
+#include <linux/isa.h>
+#include <linux/module.h>
+#include <linux/gameport.h>
+#include <asm/dma.h>
+#include <sound/core.h>
+#include <sound/wss.h>
+#include <sound/opl3.h>
+#include <sound/mpu401.h>
+#define SNDRV_LEGACY_FIND_FREE_IOPORT
+#define SNDRV_LEGACY_FIND_FREE_IRQ
+#define SNDRV_LEGACY_FIND_FREE_DMA
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Ondrej Zary <linux@rainbow-software.org>");
+MODULE_DESCRIPTION("C-Media CMI8328");
+MODULE_LICENSE("GPL");
+
+#if defined(CONFIG_GAMEPORT) || defined(CONFIG_GAMEPORT_MODULE)
+#define SUPPORT_JOYSTICK 1
+#endif
+
+/* I/O port is configured by jumpers on the card to one of these */
+static int cmi8328_ports[] = { 0x530, 0xe80, 0xf40, 0x604 };
+#define CMI8328_MAX	ARRAY_SIZE(cmi8328_ports)
+
+static int index[CMI8328_MAX] =     {[0 ... (CMI8328_MAX-1)] = -1};
+static char *id[CMI8328_MAX] =      {[0 ... (CMI8328_MAX-1)] = NULL};
+static long port[CMI8328_MAX] =     {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_PORT};
+static int irq[CMI8328_MAX] =       {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_IRQ};
+static int dma1[CMI8328_MAX] =      {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_DMA};
+static int dma2[CMI8328_MAX] =      {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_DMA};
+static long mpuport[CMI8328_MAX] =  {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_PORT};
+static int mpuirq[CMI8328_MAX] =    {[0 ... (CMI8328_MAX-1)] = SNDRV_AUTO_IRQ};
+#ifdef SUPPORT_JOYSTICK
+static bool gameport[CMI8328_MAX] = {[0 ... (CMI8328_MAX-1)] = true};
+#endif
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for CMI8328 soundcard.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for CMI8328 soundcard.");
+
+module_param_array(port, long, NULL, 0444);
+MODULE_PARM_DESC(port, "Port # for CMI8328 driver.");
+module_param_array(irq, int, NULL, 0444);
+MODULE_PARM_DESC(irq, "IRQ # for CMI8328 driver.");
+module_param_array(dma1, int, NULL, 0444);
+MODULE_PARM_DESC(dma1, "DMA1 for CMI8328 driver.");
+module_param_array(dma2, int, NULL, 0444);
+MODULE_PARM_DESC(dma2, "DMA2 for CMI8328 driver.");
+
+module_param_array(mpuport, long, NULL, 0444);
+MODULE_PARM_DESC(mpuport, "MPU-401 port # for CMI8328 driver.");
+module_param_array(mpuirq, int, NULL, 0444);
+MODULE_PARM_DESC(mpuirq, "IRQ # for CMI8328 MPU-401 port.");
+#ifdef SUPPORT_JOYSTICK
+module_param_array(gameport, bool, NULL, 0444);
+MODULE_PARM_DESC(gameport, "Enable gameport.");
+#endif
+
+struct snd_cmi8328 {
+	u16 port;
+	u8 cfg[3];
+	u8 wss_cfg;
+	struct snd_card *card;
+	struct snd_wss *wss;
+#ifdef SUPPORT_JOYSTICK
+	struct gameport *gameport;
+#endif
+};
+
+/* CMI8328 configuration registers */
+#define CFG1 0x61
+#define CFG1_SB_DISABLE	(1 << 0)
+#define CFG1_GAMEPORT	(1 << 1)
+/*
+ * bit 0:    SB: 0=enabled, 1=disabled
+ * bit 1:    gameport: 0=disabled, 1=enabled
+ * bits 2-4: SB IRQ: 001=3, 010=5, 011=7, 100=9, 101=10, 110=11
+ * bits 5-6: SB DMA: 00=disabled (when SB disabled), 01=DMA0, 10=DMA1, 11=DMA3
+ * bit 7:    SB port: 0=0x220, 1=0x240
+ */
+#define CFG2 0x62
+#define CFG2_MPU_ENABLE (1 << 2)
+/*
+ * bits 0-1: CD-ROM mode: 00=disabled, 01=Panasonic, 10=Sony/Mitsumi/Wearnes,
+			  11=IDE
+ * bit 2:    MPU401: 0=disabled, 1=enabled
+ * bits 3-4: MPU401 IRQ: 00=3, 01=5, 10=7, 11=9,
+ * bits 5-7: MPU401 port: 000=0x300, 001=0x310, 010=0x320, 011=0x330, 100=0x332,
+			  101=0x334, 110=0x336
+ */
+#define CFG3 0x63
+/*
+ * bits 0-2: CD-ROM IRQ: 000=disabled, 001=3, 010=5, 011=7, 100=9, 101=10,
+			 110=11
+ * bits 3-4: CD-ROM DMA: 00=disabled, 01=DMA0, 10=DMA1, 11=DMA3
+ * bits 5-7: CD-ROM port: 000=0x300, 001=0x310, 010=0x320, 011=0x330, 100=0x340,
+			  101=0x350, 110=0x360, 111=0x370
+ */
+
+static u8 snd_cmi8328_cfg_read(u16 port, u8 reg)
+{
+	outb(0x43, port + 3);
+	outb(0x21, port + 3);
+	outb(reg, port + 3);
+	return inb(port);
+}
+
+static void snd_cmi8328_cfg_write(u16 port, u8 reg, u8 val)
+{
+	outb(0x43, port + 3);
+	outb(0x21, port + 3);
+	outb(reg, port + 3);
+	outb(val, port + 3);	/* yes, value goes to the same port as index */
+}
+
+static void snd_cmi8328_cfg_save(u16 port, u8 cfg[])
+{
+	cfg[0] = snd_cmi8328_cfg_read(port, CFG1);
+	cfg[1] = snd_cmi8328_cfg_read(port, CFG2);
+	cfg[2] = snd_cmi8328_cfg_read(port, CFG3);
+}
+
+static void snd_cmi8328_cfg_restore(u16 port, u8 cfg[])
+{
+	snd_cmi8328_cfg_write(port, CFG1, cfg[0]);
+	snd_cmi8328_cfg_write(port, CFG2, cfg[1]);
+	snd_cmi8328_cfg_write(port, CFG3, cfg[2]);
+}
+
+static int __devinit snd_cmi8328_mixer(struct snd_wss *chip)
+{
+	struct snd_card *card;
+	struct snd_ctl_elem_id id1, id2;
+	int err;
+
+	card = chip->card;
+
+	memset(&id1, 0, sizeof(id1));
+	memset(&id2, 0, sizeof(id2));
+	id1.iface = id2.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	/* rename AUX0 switch to CD */
+	strcpy(id1.name, "Aux Playback Switch");
+	strcpy(id2.name, "CD Playback Switch");
+	err = snd_ctl_rename_id(card, &id1, &id2);
+	if (err < 0) {
+		snd_printk(KERN_ERR "error renaming control\n");
+		return err;
+	}
+	/* rename AUX0 volume to CD */
+	strcpy(id1.name, "Aux Playback Volume");
+	strcpy(id2.name, "CD Playback Volume");
+	err = snd_ctl_rename_id(card, &id1, &id2);
+	if (err < 0) {
+		snd_printk(KERN_ERR "error renaming control\n");
+		return err;
+	}
+	/* rename AUX1 switch to Synth */
+	strcpy(id1.name, "Aux Playback Switch");
+	id1.index = 1;
+	strcpy(id2.name, "Synth Playback Switch");
+	err = snd_ctl_rename_id(card, &id1, &id2);
+	if (err < 0) {
+		snd_printk(KERN_ERR "error renaming control\n");
+		return err;
+	}
+	/* rename AUX1 volume to Synth */
+	strcpy(id1.name, "Aux Playback Volume");
+	id1.index = 1;
+	strcpy(id2.name, "Synth Playback Volume");
+	err = snd_ctl_rename_id(card, &id1, &id2);
+	if (err < 0) {
+		snd_printk(KERN_ERR "error renaming control\n");
+		return err;
+	}
+
+	return 0;
+}
+
+/* find index of an item in "-1"-ended array */
+int array_find(int array[], int item)
+{
+	int i;
+
+	for (i = 0; array[i] != -1; i++)
+		if (array[i] == item)
+			return i;
+
+	return -1;
+}
+/* the same for long */
+int array_find_l(long array[], long item)
+{
+	int i;
+
+	for (i = 0; array[i] != -1; i++)
+		if (array[i] == item)
+			return i;
+
+	return -1;
+}
+
+static int __devinit snd_cmi8328_probe(struct device *pdev, unsigned int ndev)
+{
+	struct snd_card *card;
+	struct snd_opl3 *opl3;
+	struct snd_cmi8328 *cmi;
+#ifdef SUPPORT_JOYSTICK
+	struct resource *res;
+#endif
+	int err, pos;
+	static long mpu_ports[] = { 0x330, 0x300, 0x310, 0x320, 0x332, 0x334,
+				   0x336, -1 };
+	static u8 mpu_port_bits[] = { 3, 0, 1, 2, 4, 5, 6 };
+	static int mpu_irqs[] = { 9, 7, 5, 3, -1 };
+	static u8 mpu_irq_bits[] = { 3, 2, 1, 0 };
+	static int irqs[] = { 9, 10, 11, 7, -1 };
+	static u8 irq_bits[] = { 2, 3, 4, 1 };
+	static int dma1s[] = { 3, 1, 0, -1 };
+	static u8 dma_bits[] = { 3, 2, 1 };
+	static int dma2s[][2] = { {1, -1}, {0, -1}, {-1, -1}, {0, -1} };
+	u16 port = cmi8328_ports[ndev];
+	u8 val;
+
+	/* 0xff is invalid configuration (but settable - hope it isn't set) */
+	if (snd_cmi8328_cfg_read(port, CFG1) == 0xff)
+		return -ENODEV;
+	/* the SB disable bit must NEVER EVER be cleared or the WSS dies */
+	snd_cmi8328_cfg_write(port, CFG1, CFG1_SB_DISABLE);
+	if (snd_cmi8328_cfg_read(port, CFG1) != CFG1_SB_DISABLE)
+		return -ENODEV;
+	/* disable everything first */
+	snd_cmi8328_cfg_write(port, CFG2, 0);	/* disable CDROM and MPU401 */
+	snd_cmi8328_cfg_write(port, CFG3, 0);	/* disable CDROM IRQ and DMA */
+
+	if (irq[ndev] == SNDRV_AUTO_IRQ) {
+		irq[ndev] = snd_legacy_find_free_irq(irqs);
+		if (irq[ndev] < 0) {
+			snd_printk(KERN_ERR "unable to find a free IRQ\n");
+			return -EBUSY;
+		}
+	}
+	if (dma1[ndev] == SNDRV_AUTO_DMA) {
+		dma1[ndev] = snd_legacy_find_free_dma(dma1s);
+		if (dma1[ndev] < 0) {
+			snd_printk(KERN_ERR "unable to find a free DMA1\n");
+			return -EBUSY;
+		}
+	}
+	if (dma2[ndev] == SNDRV_AUTO_DMA) {
+		dma2[ndev] = snd_legacy_find_free_dma(dma2s[dma1[ndev] % 4]);
+		if (dma2[ndev] < 0) {
+			snd_printk(KERN_WARNING "unable to find a free DMA2, full-duplex will not work\n");
+			dma2[ndev] = -1;
+		}
+	}
+	/* configure WSS IRQ... */
+	pos = array_find(irqs, irq[ndev]);
+	if (pos < 0) {
+		snd_printk(KERN_ERR "invalid IRQ %d\n", irq[ndev]);
+		return -EINVAL;
+	}
+	val = irq_bits[pos] << 3;
+	/* ...and DMA... */
+	pos = array_find(dma1s, dma1[ndev]);
+	if (pos < 0) {
+		snd_printk(KERN_ERR "invalid DMA1 %d\n", dma1[ndev]);
+		return -EINVAL;
+	}
+	val |= dma_bits[pos];
+	/* ...and DMA2 */
+	if (dma2[ndev] >= 0 && dma1[ndev] != dma2[ndev]) {
+		pos = array_find(dma2s[dma1[ndev]], dma2[ndev]);
+		if (pos < 0) {
+			snd_printk(KERN_ERR "invalid DMA2 %d\n", dma2[ndev]);
+			return -EINVAL;
+		}
+		val |= 0x04; /* enable separate capture DMA */
+	}
+	outb(val, port);
+
+	err = snd_card_create(index[ndev], id[ndev], THIS_MODULE,
+				sizeof(struct snd_cmi8328), &card);
+	if (err < 0)
+		return err;
+	cmi = card->private_data;
+	cmi->card = card;
+	cmi->port = port;
+	cmi->wss_cfg = val;
+	snd_card_set_dev(card, pdev);
+
+	err = snd_wss_create(card, port + 4, -1, irq[ndev], dma1[ndev],
+			dma2[ndev], WSS_HW_DETECT, 0, &cmi->wss);
+	if (err < 0)
+		goto error;
+
+	err = snd_wss_pcm(cmi->wss, 0, NULL);
+	if (err < 0)
+		goto error;
+
+	err = snd_wss_mixer(cmi->wss);
+	if (err < 0)
+		goto error;
+	err = snd_cmi8328_mixer(cmi->wss);
+	if (err < 0)
+		goto error;
+
+	if (snd_wss_timer(cmi->wss, 0, NULL) < 0)
+		snd_printk(KERN_WARNING "error initializing WSS timer\n");
+
+	if (mpuport[ndev] == SNDRV_AUTO_PORT) {
+		mpuport[ndev] = snd_legacy_find_free_ioport(mpu_ports, 2);
+		if (mpuport[ndev] < 0)
+			snd_printk(KERN_ERR "unable to find a free MPU401 port\n");
+	}
+	if (mpuirq[ndev] == SNDRV_AUTO_IRQ) {
+		mpuirq[ndev] = snd_legacy_find_free_irq(mpu_irqs);
+		if (mpuirq[ndev] < 0)
+			snd_printk(KERN_ERR "unable to find a free MPU401 IRQ\n");
+	}
+	/* enable and configure MPU401 */
+	if (mpuport[ndev] > 0 && mpuirq[ndev] > 0) {
+		val = CFG2_MPU_ENABLE;
+		pos = array_find_l(mpu_ports, mpuport[ndev]);
+		if (pos < 0)
+			snd_printk(KERN_WARNING "invalid MPU401 port 0x%lx\n",
+								mpuport[ndev]);
+		else {
+			val |= mpu_port_bits[pos] << 5;
+			pos = array_find(mpu_irqs, mpuirq[ndev]);
+			if (pos < 0)
+				snd_printk(KERN_WARNING "invalid MPU401 IRQ %d\n",
+								mpuirq[ndev]);
+			else {
+				val |= mpu_irq_bits[pos] << 3;
+				snd_cmi8328_cfg_write(port, CFG2, val);
+				if (snd_mpu401_uart_new(card, 0,
+						MPU401_HW_MPU401, mpuport[ndev],
+						0, mpuirq[ndev], NULL) < 0)
+					snd_printk(KERN_ERR "error initializing MPU401\n");
+			}
+		}
+	}
+	/* OPL3 is hardwired to 0x388 and cannot be disabled */
+	if (snd_opl3_create(card, 0x388, 0x38a, OPL3_HW_AUTO, 0, &opl3) < 0)
+		snd_printk(KERN_ERR "error initializing OPL3\n");
+	else
+		if (snd_opl3_hwdep_new(opl3, 0, 1, NULL) < 0)
+			snd_printk(KERN_WARNING "error initializing OPL3 hwdep\n");
+
+	strcpy(card->driver, "CMI8328");
+	strcpy(card->shortname, "C-Media CMI8328");
+	sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d,%d",
+		card->shortname, cmi->wss->port, irq[ndev], dma1[ndev],
+		(dma2[ndev] >= 0) ? dma2[ndev] : dma1[ndev]);
+
+	dev_set_drvdata(pdev, card);
+	err = snd_card_register(card);
+	if (err < 0)
+		goto error;
+#ifdef SUPPORT_JOYSTICK
+	if (!gameport[ndev])
+		return 0;
+	/* gameport is hardwired to 0x200 */
+	res = request_region(0x200, 8, "CMI8328 gameport");
+	if (!res)
+		snd_printk(KERN_WARNING "unable to allocate gameport I/O port\n");
+	else {
+		struct gameport *gp = cmi->gameport = gameport_allocate_port();
+		if (!cmi->gameport)
+			release_and_free_resource(res);
+		else {
+			gameport_set_name(gp, "CMI8328 Gameport");
+			gameport_set_phys(gp, "%s/gameport0", dev_name(pdev));
+			gameport_set_dev_parent(gp, pdev);
+			gp->io = 0x200;
+			gameport_set_port_data(gp, res);
+			/* Enable gameport */
+			snd_cmi8328_cfg_write(port, CFG1,
+					CFG1_SB_DISABLE | CFG1_GAMEPORT);
+			gameport_register_port(gp);
+		}
+	}
+#endif
+	return 0;
+error:
+	snd_card_free(card);
+
+	return err;
+}
+
+static int __devexit snd_cmi8328_remove(struct device *pdev, unsigned int dev)
+{
+	struct snd_card *card = dev_get_drvdata(pdev);
+#ifdef SUPPORT_JOYSTICK
+	struct snd_cmi8328 *cmi = card->private_data;
+	if (cmi->gameport) {
+		struct resource *res = gameport_get_port_data(cmi->gameport);
+		gameport_unregister_port(cmi->gameport);
+		release_and_free_resource(res);
+	}
+#endif
+	/* disable everything */
+	snd_cmi8328_cfg_write(cmi->port, CFG1, CFG1_SB_DISABLE);
+	snd_cmi8328_cfg_write(cmi->port, CFG2, 0);
+	snd_cmi8328_cfg_write(cmi->port, CFG3, 0);
+	snd_card_free(card);
+	dev_set_drvdata(pdev, NULL);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int snd_cmi8328_suspend(struct device *pdev, unsigned int n,
+				pm_message_t state)
+{
+	struct snd_card *card = dev_get_drvdata(pdev);
+	struct snd_cmi8328 *cmi;
+
+	if (!card)	/* ignore absent devices */
+		return 0;
+	cmi = card->private_data;
+	snd_cmi8328_cfg_save(cmi->port, cmi->cfg);
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+	snd_pcm_suspend_all(cmi->wss->pcm);
+	cmi->wss->suspend(cmi->wss);
+
+	return 0;
+}
+
+static int snd_cmi8328_resume(struct device *pdev, unsigned int n)
+{
+	struct snd_card *card = dev_get_drvdata(pdev);
+	struct snd_cmi8328 *cmi;
+
+	if (!card)	/* ignore absent devices */
+		return 0;
+	cmi = card->private_data;
+	snd_cmi8328_cfg_restore(cmi->port, cmi->cfg);
+	outb(cmi->wss_cfg, cmi->port);
+	cmi->wss->resume(cmi->wss);
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+#endif
+
+static struct isa_driver snd_cmi8328_driver = {
+	.probe		= snd_cmi8328_probe,
+	.remove		= __devexit_p(snd_cmi8328_remove),
+#ifdef CONFIG_PM
+	.suspend	= snd_cmi8328_suspend,
+	.resume		= snd_cmi8328_resume,
+#endif
+	.driver		= {
+		.name	= "cmi8328"
+	},
+};
+
+static int __init alsa_card_cmi8328_init(void)
+{
+	return isa_register_driver(&snd_cmi8328_driver, CMI8328_MAX);
+}
+
+static void __exit alsa_card_cmi8328_exit(void)
+{
+	isa_unregister_driver(&snd_cmi8328_driver);
+}
+
+module_init(alsa_card_cmi8328_init)
+module_exit(alsa_card_cmi8328_exit)