diff -ru linux-2.4.17.ori/drivers/sound/trident.c linux-2.4.17/drivers/sound/trident.c
--- linux-2.4.17.ori/drivers/sound/trident.c	Tue Nov 13 14:19:41 2001
+++ linux-2.4.17/drivers/sound/trident.c	Wed Jan  9 21:51:10 2002
@@ -36,6 +36,9 @@
  *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  *  History
+ *  v0.14.9e
+ *	January 8 2002 Salvador E. Tropea (SET) <salvador@inti.gov.ar>
+ *	added a /proc/driver/{vendor}/{card}/ac97-{number} entry
  *  v0.14.9d
  *  	October 8 2001 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  *	use set_current_state, properly release resources on failure in
@@ -3822,6 +3825,43 @@
 	return 0;
 }
 
+static char driver_str[] = "driver/";
+static char ac97_str[] = "/ac97-0";
+
+static const char *pci_id2name(u16 pci_id)
+{
+	const char *ret = "unknown";
+	
+	switch (pci_id)
+	{
+	case PCI_DEVICE_ID_ALI_5451:
+		ret = "ali5451";
+		break;
+	case PCI_DEVICE_ID_SI_7018:
+		ret = "sis7018";
+		break;
+	case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
+		ret = "trident4D_DX";
+		break;
+	case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
+		ret = "trident4D_NX";
+		break;
+	case PCI_DEVICE_ID_INTERG_5050:
+		ret = "cyber5050";
+		break;
+	}
+	
+	return ret;
+}
+
+static void remove_proc_dirs(struct trident_card *card, const char *name, char *proc_str)
+{
+	sprintf(proc_str, "%s%s/%s", driver_str, name, card->pci_dev->slot_name);
+	remove_proc_entry(proc_str, NULL);
+	sprintf(proc_str, "%s%s", driver_str, name);
+	remove_proc_entry(proc_str, NULL);
+}
+
 /* AC97 codec initialisation. */
 static int __init trident_ac97_init(struct trident_card *card)
 {
@@ -3829,8 +3869,11 @@
 	unsigned long ready_2nd = 0;
 	struct ac97_codec *codec;
 	int i = 0;
+	char *proc_str;
+	const char *name;
+	int size_buf;
+	int proc_success = 0;
 	
-
 	/* initialize controller side of AC link, and find out if secondary codes
 	   really exist */
 	switch (card->pci_id)
@@ -3890,9 +3933,25 @@
 		break;
 	}
 
+	/* Create a proc directory to inform about the codec facilities */
+	name = pci_id2name(card->pci_id);
+	size_buf = sizeof(driver_str) + sizeof(ac97_str) + strlen(name) +
+		strlen(card->pci_dev->slot_name); /* Note: sizeof gives 1 extra for EOS and / */
+	proc_str = (char *)vmalloc(size_buf);
+	sprintf(proc_str, "%s%s", driver_str, name);
+	if (proc_mkdir(proc_str, 0)) {
+		sprintf(proc_str, "%s%s/%s", driver_str, name, card->pci_dev->slot_name);
+		if (proc_mkdir(proc_str, 0))
+			proc_success = 1;
+	}
+	strcat(proc_str, ac97_str);
+	size_buf = strlen(proc_str) - 1;
+
 	for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
-		if ((codec = kmalloc(sizeof(struct ac97_codec), GFP_KERNEL)) == NULL)
+		if ((codec = kmalloc(sizeof(struct ac97_codec), GFP_KERNEL)) == NULL) {
+			remove_proc_dirs(card, name, proc_str);
 			return -ENOMEM;
+		}
 		memset(codec, 0, sizeof(struct ac97_codec));
 
 		/* initialize some basic codec information, other fields will be filled
@@ -3920,11 +3979,22 @@
 
 		card->ac97_codec[num_ac97] = codec;
 
+		/* Create a proc entry to inform about the codec facilities */
+		if (proc_success) {
+			if (!create_proc_read_entry(proc_str, 0, 0, ac97_read_proc, codec))
+				proc_success = 0;
+			proc_str[size_buf]++; /* after 10 codecs looks ugly, but works */
+		}
+
 		/* if there is no secondary codec at all, don't probe any more */
 		if (!ready_2nd)
 			break;
 	}
 
+	vfree(proc_str);
+	if (!proc_success)
+		printk(KERN_WARNING "trident: cannot create /proc entry\n");
+
 	if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
 		for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
 			if (card->ac97_codec[num_ac97] == NULL)
@@ -4145,6 +4215,9 @@
 {
 	int i;
 	struct trident_card *card = pci_get_drvdata(pci_dev);
+	int size_buf;
+	char *proc_str;
+	const char *name;
 
 	/*
  	 *	Kill running timers before unload. We can't have them
@@ -4170,12 +4243,27 @@
 	free_irq(card->irq, card);
 	release_region(card->iobase, 256);
 
+	name = pci_id2name(card->pci_id);
+	size_buf = sizeof(driver_str) + sizeof(ac97_str) + strlen(name) +
+		strlen(card->pci_dev->slot_name); /* Note: sizeof gives 1 extra for EOS */
+	proc_str = (char *)vmalloc(size_buf);
+	sprintf(proc_str, "%s%s/%s%s", driver_str, name, card->pci_dev->slot_name,
+		ac97_str);
+	size_buf = strlen(proc_str) - 1;
+
 	/* unregister audio devices */
-	for (i = 0; i < NR_AC97; i++)
+	for (i = 0; i < NR_AC97; i++) {
 		if (card->ac97_codec[i] != NULL) {
 			unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
 			kfree (card->ac97_codec[i]);
 		}
+		remove_proc_entry(proc_str, NULL);
+		proc_str[size_buf]++;
+	}
+
+	remove_proc_dirs(card, name, proc_str);
+	vfree(proc_str);
+
 	unregister_sound_dsp(card->dev_audio);
 
 	kfree(card);