patch-2.3.43 linux/drivers/sound/via82cxxx_audio.c

• Lines: 722
• Date: Wed Feb 9 18:54:11 2000
• Orig file: v2.3.42/linux/drivers/sound/via82cxxx_audio.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.42/linux/drivers/sound/via82cxxx_audio.c linux/drivers/sound/via82cxxx_audio.c
@@ -0,0 +1,721 @@
+/*
+ * Support for VIA 82Cxxx Audio Codecs
+ * Copyright 1999,2000 Jeff Garzik <jgarzik@mandrakesoft.com>
+ *
+ * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
+ * See the "COPYING" file distributed with this software for more info.
+ *
+ * Documentation for this driver available as
+ * linux/Documentation/sound/via82cxxx.txt.
+ *
+ * Since the mixer is called from the OSS glue the kernel lock is always held
+ * on our AC97 mixing
+ */
+ 
+
+#define VIA_VERSION	"1.1.2.1"
+
+
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+
+#include <asm/io.h>
+
+#include "sound_config.h"
+#include "soundmodule.h"
+#include "sb.h"
+#include "ac97.h"
+
+#ifndef SOUND_LOCK
+#define SOUND_LOCK do {} while (0)
+#define SOUND_LOCK_END do {} while (0)
+#endif
+
+#define VIA_DEBUG 0	/* define to 1 to enable debugging output and checks */
+#if VIA_DEBUG
+/* note: prints function name for you */
+#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#define VIA_NDEBUG 0	/* define to 1 to disable lightweight runtime checks */
+#if VIA_NDEBUG
+#define assert(expr)
+#else
+#define assert(expr) \
+        if(!(expr)) {					\
+        printk( "Assertion failed! %s,%s,%s,line=%d\n",	\
+        #expr,__FILE__,__FUNCTION__,__LINE__);		\
+        }
+#endif
+
+#define arraysize(x)            (sizeof(x)/sizeof(*(x)))
+
+#define MAX_CARDS	2
+
+#define	LINE_SIZE	10
+
+#define VIA_CARD_NAME	"VIA 82Cxxx Audio driver " VIA_VERSION
+#define VIA_MODULE_NAME "via_audio"
+#define PFX		VIA_MODULE_NAME ": "
+
+#define VIA_COUNTER_LIMIT	100000
+
+/* 82C686 function 5 (audio codec) PCI configuration registers */
+#define VIA_FUNC_ENABLE		0x42
+#define VIA_PNP_CONTROL		0x43
+#define VIA_AC97_CTRL		0x80
+
+/* PCI configuration register bits and masks */
+#define VIA_CR40_AC97_READY	0x01
+#define VIA_CR40_AC97_LOW_POWER	0x02
+#define VIA_CR40_SECONDARY_READY 0x04
+
+#define VIA_CR41_ACLINK_ENABLE	0x80
+
+#define VIA_CR42_SB_ENABLE	0x01
+#define VIA_CR42_MIDI_ENABLE	0x02
+#define VIA_CR42_FM_ENABLE	0x04
+#define VIA_CR42_GAME_ENABLE	0x08
+
+#define VIA_CR44_SECOND_CODEC_SUPPORT	(1 << 6)
+#define VIA_CR44_AC_LINK_ACCESS		(1 << 7)
+
+#define VIA_CR80_FIRST_CODEC		0
+#define VIA_CR80_SECOND_CODEC		(1 << 30)
+#define VIA_CR80_FIRST_CODEC_VALID	(1 << 25)
+#define VIA_CR80_SECOND_CODEC_VALID	(1 << 27)
+#define VIA_CR80_BUSY			(1 << 24)
+#define VIA_CR80_READ_MODE		(1 << 23)
+#define VIA_CR80_WRITE_MODE		0
+#define VIA_CR80_REG_IDX(idx)		(((idx) & 0x7E) << 16)
+
+struct via_info {
+	struct address_info sb_data;
+	struct address_info opl3_data;
+	struct pci_dev *pdev;
+	struct ac97_hwint ac97;
+	int mixer_oss_dev;
+	int have_ac97;
+};
+static struct via_info		cards [MAX_CARDS];
+static unsigned			num_cards = 0;
+
+
+static const struct {
+	int revision;
+	const char *rev_name;
+} via_chip_revs[] __initdata = {
+	{ 0x10, "A" },
+	{ 0x11, "B" },
+	{ 0x12, "C" },
+	{ 0x13, "D" },
+	{ 0x14, "E" },
+	{ 0x20, "H" },
+};
+
+static inline void via_ac97_write32 (struct pci_dev *pdev, int port, u32 data)
+{
+	struct resource *rsrc = &pdev->resource[0];
+	outw ((u16)data,rsrc->start+port);	
+	outw ((u16)(data>>16),rsrc->start+port+2);	
+}
+
+static inline u32 via_ac97_read32 (struct pci_dev *pdev, int port)
+{
+	struct resource *rsrc = &pdev->resource[0];
+	return
+		((u32)inw (rsrc->start+port)) |
+		(((u32)inw (rsrc->start+port+2)) << 16);
+}
+
+/****************************************************************
+ *
+ * Intel Audio Codec '97 interface
+ *
+ *
+ */
+ 
+static inline void via_ac97_wait_idle (struct pci_dev *pdev)
+{
+	u32 tmp;
+	int counter = VIA_COUNTER_LIMIT;
+	
+	DPRINTK ("ENTER\n");
+
+	assert (pdev != NULL);
+	
+	do {
+		tmp = via_ac97_read32 (pdev,VIA_AC97_CTRL);
+	} while ((tmp & VIA_CR80_BUSY) && (counter-- > 0));
+
+	DPRINTK ("EXIT%s\n", counter > 0 ? "" : ", counter limit reached");
+}
+
+
+static int via_ac97_read_reg (struct ac97_hwint *dev, u8 reg)
+{
+	u32 data;
+	struct via_info *card;
+	struct pci_dev *pdev;
+	
+	DPRINTK ("ENTER\n");
+
+	assert (dev != NULL);
+	assert (dev->driver_private != NULL);
+
+	card = (struct via_info *) dev->driver_private;
+	pdev = card->pdev;
+	assert (pdev != NULL);
+
+	via_ac97_wait_idle (pdev);
+	data =	VIA_CR80_FIRST_CODEC | VIA_CR80_FIRST_CODEC_VALID |
+		VIA_CR80_READ_MODE | VIA_CR80_REG_IDX(reg);
+	via_ac97_write32 (pdev,VIA_AC97_CTRL,data);
+	via_ac97_wait_idle (pdev);
+	data = via_ac97_read32 (pdev,VIA_AC97_CTRL);
+
+#if 0
+	if (! (data & VIA_CR80_FIRST_CODEC_VALID)) {
+		DPRINTK ("EXIT, first codec not valid, returning -1\n");
+		return -1;
+	}
+#endif
+
+	DPRINTK ("EXIT, returning %d\n", data & 0xFFFF);
+	return data & 0xFFFF;
+}
+
+
+static int via_ac97_write_reg (struct ac97_hwint *dev, u8 reg, u16 value)
+{
+	u32 data;
+	struct via_info *card;
+	struct pci_dev *pdev;
+	
+	DPRINTK ("ENTER\n");
+
+	assert (dev != NULL);
+	assert (dev->driver_private != NULL);
+
+	card = (struct via_info *) dev->driver_private;
+	pdev = card->pdev;
+	assert (pdev != NULL);
+
+	via_ac97_wait_idle (pdev);
+	data =	VIA_CR80_FIRST_CODEC | VIA_CR80_FIRST_CODEC_VALID |
+		VIA_CR80_WRITE_MODE | VIA_CR80_REG_IDX(reg) | value;
+	via_ac97_write32 (pdev,VIA_AC97_CTRL,data);
+
+#if 0
+	if (! (data & VIA_CR80_FIRST_CODEC_VALID)) {
+		DPRINTK ("EXIT, first codec invalid, returning -1\n");
+		return -1;
+	}
+#endif
+
+	DPRINTK ("EXIT, returning 0\n");
+	return 0;
+}
+
+
+static int via_ac97_reset (struct ac97_hwint *dev)
+{
+	struct via_info *card;
+	struct pci_dev *pdev;
+	
+	DPRINTK ("ENTER\n");
+
+	assert (dev != NULL);
+	assert (dev->driver_private != NULL);
+
+	card = (struct via_info *) dev->driver_private;
+	pdev = card->pdev;
+	assert (pdev != NULL);
+	
+	pci_write_config_word (pdev, PCI_COMMAND, PCI_COMMAND_IO);
+
+	DPRINTK ("EXIT, returning 0\n");
+	return 0;
+}
+
+
+static struct via_info *via_ac97_find_card_for_mixer (int dev)
+{
+	int x;
+
+	DPRINTK ("ENTER\n");
+
+	for (x = 0; x < num_cards; x++)
+		if (cards[x].mixer_oss_dev == dev) {
+			DPRINTK ("EXIT, returning %p\n", cards + x);
+			return cards + x;
+		}
+
+	DPRINTK ("EXIT, returning 0\n");
+	return NULL;
+}
+
+
+static int
+via_ac97_default_mixer_ioctl (int dev, unsigned int cmd, caddr_t arg)
+{
+	int rc;
+	struct via_info *card = via_ac97_find_card_for_mixer (dev);
+
+	DPRINTK ("ENTER\n");
+
+	if (card != NULL) {
+		rc = ac97_mixer_ioctl (&card->ac97, cmd, arg);
+		DPRINTK ("EXIT, returning %d\n", rc);
+		return rc;
+	}
+	
+	DPRINTK ("EXIT, returning -ENODEV\n");
+	return -ENODEV;
+
+}
+
+static struct mixer_operations via_ac97_mixer_operations =
+{
+	"VIA82Cxxx",
+	"via82cxxxAC97Mixer",
+	via_ac97_default_mixer_ioctl
+};
+
+static int __init via_attach_ac97 (struct via_info *card)
+{
+	int mixer;
+	struct ac97_hwint *mdev;
+
+	DPRINTK ("ENTER\n");
+
+	assert (card != NULL);
+
+	mdev = &card->ac97;
+
+	memset (mdev, 0, sizeof (*mdev));
+	mdev->reset_device = via_ac97_reset;
+	mdev->read_reg = via_ac97_read_reg;
+	mdev->write_reg = via_ac97_write_reg;
+	mdev->driver_private = (void *) card;
+
+	if (ac97_init (mdev)) {
+		printk (KERN_ERR PFX "Unable to init AC97\n");
+		DPRINTK ("EXIT, returning -1\n");
+		return -1;
+	}
+	mixer = sound_alloc_mixerdev ();
+	if (mixer < 0 || num_mixers >= MAX_MIXER_DEV) {
+		printk (KERN_ERR PFX "Unable to alloc mixerdev\n");
+		DPRINTK ("EXIT, returning -1\n");
+		return -1;
+	}
+	mixer_devs[mixer] = &via_ac97_mixer_operations;
+	card->mixer_oss_dev = mixer;
+
+	/* Some reasonable default values.  */
+	ac97_set_mixer (mdev, SOUND_MIXER_VOLUME, (85 << 8) | 85);
+	ac97_set_mixer (mdev, SOUND_MIXER_SPEAKER, 100);
+	ac97_set_mixer (mdev, SOUND_MIXER_PCM, (65 << 8) | 65);
+	ac97_set_mixer (mdev, SOUND_MIXER_CD, (65 << 8) | 65);
+
+	printk (KERN_INFO PFX "Initialized AC97 mixer\n");
+	
+	card->have_ac97 = mixer;
+	
+	DPRINTK ("EXIT, returning 0\n");
+	return 0;
+}
+
+
+static void via_unload_ac97 (struct via_info *card)
+{
+	DPRINTK ("ENTER\n");
+
+	assert (card != NULL);
+
+	if (card->have_ac97 >= 0)
+		sound_unload_mixerdev (card->have_ac97);
+
+	DPRINTK ("EXIT\n");
+}
+
+
+#ifdef CONFIG_PROC_FS
+
+/****************************************************************
+ *
+ * /proc/driver/via82cxxx/info
+ *
+ *
+ */
+
+static int via_info_read_proc (char *page, char **start, off_t off,
+			       int count, int *eof, void *data)
+{
+#define YN(val,bit) (((val) & (bit)) ? "yes" : "no")
+
+	int len = 0, i;
+	u8 r40, r41, r42, r44;
+	
+	DPRINTK ("ENTER\n");
+
+	len += sprintf (page+len, VIA_CARD_NAME "\n\n");
+	
+	for (i = 0; i < num_cards; i++) {
+		pci_read_config_byte (cards[i].pdev, 0x40, &r40);
+		pci_read_config_byte (cards[i].pdev, 0x42, &r41);
+		pci_read_config_byte (cards[i].pdev, 0x42, &r42);
+		pci_read_config_byte (cards[i].pdev, 0x44, &r44);
+	
+		len += sprintf (page+len,
+			"40  AC97 Codec Ready: %s\n"
+			"    AC97 Codec Low-power: %s\n"
+			"    Secondary Codec Ready: %s\n"
+
+			"41  AC-Link Interface Enable: %s\n"
+
+			"42  Game port enabled: %s\n"
+			"    SoundBlaster enabled: %s\n"
+			"    FM enabled: %s\n"
+			"    MIDI enabled: %s\n"
+			
+			"44  AC-Link Interface Access: %s\n"
+			"    Secondary Codec Support: %s\n"
+			
+			"\n",
+			
+			YN (r40, VIA_CR40_AC97_READY),
+			YN (r40, VIA_CR40_AC97_LOW_POWER),
+			YN (r40, VIA_CR40_SECONDARY_READY),
+
+			YN (r41, VIA_CR41_ACLINK_ENABLE),
+
+			YN (r42, VIA_CR42_GAME_ENABLE),
+			YN (r42, VIA_CR42_SB_ENABLE),
+			YN (r42, VIA_CR42_FM_ENABLE),
+			YN (r42, VIA_CR42_MIDI_ENABLE),
+
+			YN (r44, VIA_CR44_AC_LINK_ACCESS),
+			YN (r44, VIA_CR44_SECOND_CODEC_SUPPORT)
+			
+			);
+	}
+	
+	DPRINTK("EXIT, returning %d\n", len);
+	return len;
+
+#undef YN
+}
+
+
+/****************************************************************
+ *
+ * /proc/driver/via82cxxx
+ *
+ *
+ */
+
+static int __init via_init_proc (void)
+{
+	DPRINTK ("ENTER\n");
+
+	proc_mkdir ("driver/via_audio", 0);
+	create_proc_read_entry ("driver/via_audio/info", 0, 0, via_info_read_proc, NULL);
+	
+	DPRINTK("EXIT\n");
+	return 0;
+}
+
+
+
+static void __exit via_cleanup_proc (void)
+{
+	DPRINTK ("ENTER\n");
+	remove_proc_entry ("driver/via_audio/info", NULL);
+	remove_proc_entry ("driver/via_audio", NULL);
+	DPRINTK("EXIT\n");
+}
+
+
+#else
+
+static inline int via_init_proc (void) { return 0; }
+static inline void via_cleanup_proc (void) {}
+
+#endif /* CONFIG_PROC_FS */
+
+
+/****************************************************************
+ *
+ * Legacy SoundBlaster Pro, FM support via OSS
+ *
+ *
+ */
+
+static void __init via_attach_sb(struct address_info *hw_config)
+{
+	DPRINTK ("ENTER\n");
+
+	if(!sb_dsp_init(hw_config))
+		hw_config->slots[0] = -1;
+
+	DPRINTK("EXIT\n");
+}
+
+
+static int __init via_probe_sb(struct address_info *hw_config)
+{
+	DPRINTK ("ENTER\n");
+
+	if (check_region(hw_config->io_base, 16))
+	{
+		printk(KERN_DEBUG PFX "SBPro port 0x%x is already in use\n",
+		       hw_config->io_base);
+		return 0;
+	}
+	DPRINTK("EXIT after sb_dsp_detect\n");
+	return sb_dsp_detect(hw_config, 0, 0);
+}
+
+
+static void __exit via_unload_sb(struct address_info *hw_config)
+{
+	DPRINTK ("ENTER\n");
+
+	if(hw_config->slots[0] != -1)
+		sb_dsp_unload(hw_config, 1);
+
+	DPRINTK("EXIT\n");
+}
+
+
+static const struct {
+	int sb_irq,
+	    sb_dma,
+	    midi_base,
+	    sb_io_base;
+} via_pnp_data[] __initdata = {
+	{ 5, 0, 0x300, 0x220 },
+	{ 7, 1, 0x310, 0x240 },
+	{ 9, 2, 0x320, 0x260 },
+	{ 10,3, 0x330, 0x280 },
+};
+
+
+/****************************************************************
+ *
+ * Chip setup and kernel registration
+ *
+ *
+ */
+
+static int __init via82cxxx_install (struct pci_dev *pcidev)
+{
+	int sb_io_base;
+	int sb_irq;
+	int sb_dma;
+	int midi_base, rc;
+	u8 tmp8;
+	struct via_info *card = &cards[num_cards];
+	
+	DPRINTK ("ENTER\n");
+
+	card->pdev = pcidev;
+	card->have_ac97 = -1;
+	
+	/* turn off legacy features, if not already */
+	pci_read_config_byte (pcidev, VIA_FUNC_ENABLE, &tmp8);
+	tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_MIDI_ENABLE |
+		  VIA_CR42_FM_ENABLE);
+	pci_write_config_byte (pcidev, VIA_FUNC_ENABLE, tmp8);
+
+	/* 
+	 * try to init AC97 mixer device
+	 */
+	rc = via_attach_ac97 (card);
+	if (rc) {
+		printk (KERN_WARNING PFX
+			"AC97 init failed, SB legacy mode only\n");
+	}
+	
+	/* turn on legacy features */
+	pci_read_config_byte (pcidev, VIA_FUNC_ENABLE, &tmp8);
+	tmp8 |= VIA_CR42_SB_ENABLE | VIA_CR42_MIDI_ENABLE |
+		VIA_CR42_FM_ENABLE;
+	pci_write_config_byte (pcidev, VIA_FUNC_ENABLE, tmp8);
+
+	/* read legacy PNP info byte */
+	pci_read_config_byte (pcidev, VIA_PNP_CONTROL, &tmp8);
+	pci_write_config_byte (pcidev, VIA_PNP_CONTROL, tmp8);
+	
+	sb_irq = via_pnp_data[((tmp8 >> 6) & 0x03)].sb_irq;
+	sb_dma = via_pnp_data[((tmp8 >> 4) & 0x03)].sb_dma;
+	midi_base = via_pnp_data[((tmp8 >> 2) & 0x03)].midi_base;
+	sb_io_base = via_pnp_data[(tmp8 & 0x03)].sb_io_base;
+
+	udelay(100);
+	
+	printk(KERN_INFO PFX "legacy "
+	       "MIDI: 0x%X, SB: 0x%X / %d IRQ / %d DMA\n",
+		midi_base, sb_io_base, sb_irq, sb_dma);
+		
+	card->sb_data.name = VIA_CARD_NAME;
+	card->sb_data.card_subtype = MDL_SBPRO;
+	card->sb_data.io_base = sb_io_base;
+	card->sb_data.irq = sb_irq;
+	card->sb_data.dma = sb_dma;
+	
+	/* register legacy SoundBlaster Pro */
+	if (!via_probe_sb (&card->sb_data)) {
+		printk (KERN_ERR PFX
+			"SB probe @ 0x%X failed, aborting\n",
+			sb_io_base);
+		DPRINTK ("EXIT, returning -1\n");
+		return -1;
+	}
+	via_attach_sb (&card->sb_data);
+
+	card->opl3_data.name = card->sb_data.name;
+	card->opl3_data.io_base = midi_base;
+	card->opl3_data.irq = -1;
+	
+	/* register legacy MIDI */
+	if (!probe_uart401 (&card->opl3_data)) {
+		printk (KERN_WARNING PFX
+			"MIDI probe @ 0x%X failed, continuing\n",
+			midi_base);
+		card->opl3_data.io_base = 0;
+	} else {
+		attach_uart401 (&card->opl3_data);
+	}
+
+	num_cards++;	
+	DPRINTK ("EXIT, returning 0\n");
+	return 0;
+}
+
+
+/*
+ * 	This loop walks the PCI configuration database and finds where
+ *	the sound cards are.
+ *
+ *	Note - only a single PCI scan occurs, eliminating possibility
+ *	of multiple audio chips
+ *
+ */
+ 
+static int __init probe_via82cxxx (void)
+{
+	struct pci_dev *pcidev = NULL;
+
+	DPRINTK ("ENTER\n");
+
+	pcidev = pci_find_device (PCI_VENDOR_ID_VIA,
+				  PCI_DEVICE_ID_VIA_82C686_5, NULL);
+
+	if (!pcidev || via82cxxx_install (pcidev) != 0) {
+		printk (KERN_ERR PFX "audio init failed\n");
+		DPRINTK ("EXIT, returning -1\n");
+		return -1;
+	}
+
+	DPRINTK ("EXIT, returning 0\n");
+	return 0;
+}
+
+
+/*
+ *	This function is called when the user or kernel loads the 
+ *	module into memory.
+ */
+
+
+static int __init init_via82cxxx_module(void)
+{
+	u8 tmp;
+	int i;
+	const char *rev = "unknown!";
+	
+	memset (cards, 0, sizeof (cards));
+	
+	DPRINTK ("ENTER\n");
+
+	if (!pci_present ()) {
+		printk (KERN_DEBUG PFX "PCI not present, exiting\n");
+		DPRINTK ("EXIT, returning -ENODEV\n");
+		return -ENODEV;
+	}
+
+	if (probe_via82cxxx() != 0) {
+		printk(KERN_ERR PFX "probe failed, aborting\n");
+		/* XXX unload cards registered so far, if any */
+		DPRINTK ("EXIT, returning -ENODEV\n");
+		return -ENODEV;
+	}
+
+	pci_read_config_byte (cards[0].pdev, PCI_REVISION_ID, &tmp);
+	for (i = 0; i < arraysize(via_chip_revs); i++)
+		if (via_chip_revs[i].revision == tmp) {
+			rev = via_chip_revs[i].rev_name;
+			break;
+		}
+	printk (KERN_INFO PFX VIA_CARD_NAME " loaded\n");
+	printk (KERN_INFO PFX "Chip rev %s.  Features: SBPro compat%s%s\n",
+		rev,
+		cards[0].opl3_data.io_base == 0 ? "" : ", MPU-401 MIDI",
+		cards[0].have_ac97 == -1 ? "" : ", AC97 mixer");
+	
+	if (via_init_proc () != 0) {
+		printk (KERN_WARNING PFX
+			"Unable to init experimental /proc, ignoring\n");
+	}
+
+	/*
+	 *	Binds us to the sound subsystem	
+	 */
+	SOUND_LOCK;
+	DPRINTK ("EXIT, returning 0\n");
+	return 0;
+}
+
+/*
+ *	This is called when it is removed. It will only be removed 
+ *	when its use count is 0. For sound the SOUND_LOCK/SOUND_UNLOCK
+ *	macros hide the entire work for this.
+ */
+ 
+static void __exit cleanup_via82cxxx_module(void)
+{
+	DPRINTK("ENTER\n");
+	
+	if (cards[0].opl3_data.io_base)
+		unload_uart401 (&cards[0].opl3_data);
+
+	via_unload_sb (&cards[0].sb_data);
+	
+	via_unload_ac97 (&cards[0]);
+
+	via_cleanup_proc ();
+	
+	/*
+	 *	Final clean up with the sound layer
+	 */
+	SOUND_LOCK_END;
+
+	DPRINTK("EXIT\n");
+}
+
+module_init(init_via82cxxx_module);
+module_exit(cleanup_via82cxxx_module);
+