[ALSA] Add support for Cyrix/NatSemi Geode CS5530 (VSA1)

Add support for Cyrix/NatSemi Geode SC5530 (VSA1).
The driver is snd-cs5530.
Signed-off-by Ash Willis <ashwillis@programmer.net>

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

Documentation/sound/alsa/ALSA-Configuration.txt

@@ -467,7 +467,12 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     above explicitly.
 
     The power-management is supported.
-    
+
+  Module snd-cs5530
+  _________________
+
+    Module for Cyrix/NatSemi Geode 5530 chip. 
+  
   Module snd-cs5535audio
   ----------------------
 

include/sound/sb.h

@@ -38,6 +38,7 @@ enum sb_hw_type {
 	SB_HW_ALS100,		/* Avance Logic ALS100 chip */
 	SB_HW_ALS4000,		/* Avance Logic ALS4000 chip */
 	SB_HW_DT019X,		/* Diamond Tech. DT-019X / Avance Logic ALS-007 */
+	SB_HW_CS5530,		/* Cyrix/NatSemi 5530 VSA1 */
 };
 
 #define SB_OPEN_PCM			0x01

sound/isa/sb/sb16_main.c

@@ -563,6 +563,11 @@ static int snd_sb16_playback_open(struct snd_pcm_substream *substream)
       __open_ok:
 	if (chip->hardware == SB_HW_ALS100)
 		runtime->hw.rate_max = 48000;
+	if (chip->hardware == SB_HW_CS5530) {
+		runtime->hw.buffer_bytes_max = 32 * 1024;
+		runtime->hw.periods_min = 2;
+		runtime->hw.rate_min = 44100;
+	}
 	if (chip->mode & SB_RATE_LOCK)
 		runtime->hw.rate_min = runtime->hw.rate_max = chip->locked_rate;
 	chip->playback_substream = substream;
@@ -633,6 +638,11 @@ static int snd_sb16_capture_open(struct snd_pcm_substream *substream)
       __open_ok:
 	if (chip->hardware == SB_HW_ALS100)
 		runtime->hw.rate_max = 48000;
+	if (chip->hardware == SB_HW_CS5530) {
+		runtime->hw.buffer_bytes_max = 32 * 1024;
+		runtime->hw.periods_min = 2;
+		runtime->hw.rate_min = 44100;
+	}
 	if (chip->mode & SB_RATE_LOCK)
 		runtime->hw.rate_min = runtime->hw.rate_max = chip->locked_rate;
 	chip->capture_substream = substream;

sound/isa/sb/sb_common.c

@@ -128,7 +128,7 @@ static int snd_sbdsp_probe(struct snd_sb * chip)
 	minor = version & 0xff;
 	snd_printdd("SB [0x%lx]: DSP chip found, version = %i.%i\n",
 		    chip->port, major, minor);
-	
+
 	switch (chip->hardware) {
 	case SB_HW_AUTO:
 		switch (major) {
@@ -168,6 +168,9 @@ static int snd_sbdsp_probe(struct snd_sb * chip)
 	case SB_HW_DT019X:
 		str = "(DT019X/ALS007)";
 		break;
+	case SB_HW_CS5530:
+		str = "16 (CS5530)";
+		break;
 	default:
 		return -ENODEV;
 	}

sound/isa/sb/sb_mixer.c

@@ -821,6 +821,7 @@ int snd_sbmixer_new(struct snd_sb *chip)
 		break;
 	case SB_HW_16:
 	case SB_HW_ALS100:
+	case SB_HW_CS5530:
 		if ((err = snd_sbmixer_init(chip,
 					    snd_sb16_controls,
 					    ARRAY_SIZE(snd_sb16_controls),
@@ -950,6 +951,7 @@ void snd_sbmixer_suspend(struct snd_sb *chip)
 		break;
 	case SB_HW_16:
 	case SB_HW_ALS100:
+	case SB_HW_CS5530:
 		save_mixer(chip, sb16_saved_regs, ARRAY_SIZE(sb16_saved_regs));
 		break;
 	case SB_HW_ALS4000:
@@ -975,6 +977,7 @@ void snd_sbmixer_resume(struct snd_sb *chip)
 		break;
 	case SB_HW_16:
 	case SB_HW_ALS100:
+	case SB_HW_CS5530:
 		restore_mixer(chip, sb16_saved_regs, ARRAY_SIZE(sb16_saved_regs));
 		break;
 	case SB_HW_ALS4000:

sound/pci/Kconfig

@@ -215,6 +215,16 @@ config SND_CS46XX_NEW_DSP
 
 	  This works better than the old code, so say Y.
 
+config SND_CS5530
+	tristate "CS5530 Audio"
+	depends on SND && ISA_DMA_API
+	select SND_SB16
+	help
+	  Say Y here to include support for audio on Cyrix/NatSemi CS5530 chips.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-cs5530.
+
 config SND_CS5535AUDIO
 	tristate "CS5535/CS5536 Audio"
 	depends on SND && X86 && !X86_64

sound/pci/Makefile

@@ -12,6 +12,7 @@ snd-azt3328-objs := azt3328.o
 snd-bt87x-objs := bt87x.o
 snd-cmipci-objs := cmipci.o
 snd-cs4281-objs := cs4281.o
+snd-cs5530-objs := cs5530.o
 snd-ens1370-objs := ens1370.o
 snd-ens1371-objs := ens1371.o
 snd-es1938-objs := es1938.o
@@ -36,6 +37,7 @@ obj-$(CONFIG_SND_AZT3328) += snd-azt3328.o
 obj-$(CONFIG_SND_BT87X) += snd-bt87x.o
 obj-$(CONFIG_SND_CMIPCI) += snd-cmipci.o
 obj-$(CONFIG_SND_CS4281) += snd-cs4281.o
+obj-$(CONFIG_SND_CS5530) += snd-cs5530.o
 obj-$(CONFIG_SND_ENS1370) += snd-ens1370.o
 obj-$(CONFIG_SND_ENS1371) += snd-ens1371.o
 obj-$(CONFIG_SND_ES1938) += snd-es1938.o

sound/pci/cs5530.c

@@ -0,0 +1,306 @@
+/*
+ * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
+ *
+ * 	(C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
+ *	(C) Copyright 2003 Red Hat Inc <alan@redhat.com>
+ *
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * TO DO:
+ *	Investigate whether we can portably support Cognac (5520) in the
+ *	same manner.
+ */
+
+#include <sound/driver.h>
+#include <linux/delay.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+struct snd_cs5530 {
+	struct snd_card *card;
+	struct pci_dev *pci;
+	struct snd_sb *sb;
+	unsigned long pci_base;
+};
+
+static 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 __devexit snd_cs5530_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static u8 __devinit 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 __devinit 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 = ioremap_nocache(chip->pci_base, pci_resource_len(pci, 0));
+	if (mem == NULL) {
+		kfree(chip);
+		pci_disable_device(pci);
+		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))
+		printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
+	else {
+		printk(KERN_ERR "Could not find XpressAudio!\n");
+		snd_cs5530_free(chip);
+		return -ENODEV;
+	}
+
+	if (map & (1<<5))
+		printk(KERN_INFO "CS5530: MPU at 0x300\n");
+	else if (map & (1<<6))
+		printk(KERN_INFO "CS5530: 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 {
+		printk(KERN_ERR "CS5530: 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 {
+		printk(KERN_ERR "CS5530: 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 {
+		printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
+		snd_cs5530_free(chip);
+		return -ENODEV;
+	}
+
+	printk(KERN_INFO "CS5530: 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) {
+		printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
+		snd_cs5530_free(chip);
+		return err;
+	}
+
+	err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
+	if (err < 0) {
+		printk(KERN_ERR "CS5530: Could not create PCM\n");
+		snd_cs5530_free(chip);
+		return err;
+	}
+
+	err = snd_sbmixer_new(chip->sb);
+	if (err < 0) {
+		printk(KERN_ERR "CS5530: 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;
+	}
+
+	snd_card_set_dev(card, &pci->dev);
+	*rchip = chip;
+	return 0;
+}
+
+static int __devinit 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;
+	}
+
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+
+	if (card == NULL)
+		return -ENOMEM;
+
+	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 driver = {
+	.name = "CS5530_Audio",
+	.id_table = snd_cs5530_ids,
+	.probe = snd_cs5530_probe,
+	.remove = __devexit_p(snd_cs5530_remove),
+};
+
+static int __init alsa_card_cs5530_init(void)
+{
+	return pci_register_driver(&driver);
+}
+
+static void __exit alsa_card_cs5530_exit(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_cs5530_init)
+module_exit(alsa_card_cs5530_exit)
+