patch-2.3.17 linux/drivers/sound/via82cxxx.c

• Lines: 257
• Date: Tue Sep 7 10:22:12 1999
• Orig file: v2.3.16/linux/drivers/sound/via82cxxx.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.16/linux/drivers/sound/via82cxxx.c linux/drivers/sound/via82cxxx.c
@@ -0,0 +1,256 @@
+/*
+ * Support for VIA 82Cxxx Audio Codecs
+ * Copyright 1999 Jeff Garzik <jgarzik@pobox.com>
+ *
+ * Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
+ * See the "COPYING" file distributed with this software for more info.
+ *
+ ********************************************************************
+ *
+ * TODO:
+ *
+ *	- Integrate AC'97 support, when AC'97 interface released
+ *
+ */
+ 
+#include <linux/module.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 <asm/io.h>
+
+#include "sound_config.h"
+#include "soundmodule.h"
+#include "sb.h"
+
+#ifndef SOUND_LOCK
+#define SOUND_LOCK do {} while (0)
+#define SOUND_LOCK_END do {} while (0)
+#endif
+
+#define MAX_CARDS	2
+
+#define PFX		"via82cxxx: "
+
+#define VIA_VERSION	"1.0.0"
+#define VIA_CARD_NAME	"VIA 82Cxxx Audio driver " VIA_VERSION
+
+#define VIA_FUNC_ENABLE		0x42
+#define VIA_PNP_CONTROL		0x43
+
+#define VIA_CR42_SB_ENABLE	0x01
+#define VIA_CR42_MIDI_ENABLE	0x02
+#define VIA_CR42_FM_ENABLE	0x04
+
+#define via_probe_midi probe_uart401
+#define via_attach_midi attach_uart401
+#define via_unload_midi unload_uart401
+
+static struct address_info	sb_data[MAX_CARDS];
+static struct address_info	opl3_data[MAX_CARDS];
+static unsigned			cards = 0;
+
+
+static void __init via_attach_sb(struct address_info *hw_config)
+{
+	if(!sb_dsp_init(hw_config))
+		hw_config->slots[0] = -1;
+}
+
+
+static int __init via_probe_sb(struct address_info *hw_config)
+{
+	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;
+	}
+	return sb_dsp_detect(hw_config, 0, 0);
+}
+
+
+static void __exit via_unload_sb(struct address_info *hw_config, int unload_mpu)
+{
+	if(hw_config->slots[0]!=-1)
+		sb_dsp_unload(hw_config, unload_mpu);
+}
+
+
+static int __init via82cxxx_install (struct pci_dev *pcidev)
+{
+	int sb_io_base = 0;
+	int sb_irq = 0;
+	int sb_dma = 0;
+	int midi_base = 0;
+	u8 tmp8;
+	
+	memset (&sb_data[cards], 0, sizeof (struct address_info));
+	memset (&opl3_data[cards], 0, sizeof (struct address_info));
+
+	sb_data[cards].name = opl3_data[cards].name = VIA_CARD_NAME;
+	opl3_data[cards].irq = -1;
+
+	/* turn on 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);
+
+	/* read legacy PNP info byte */
+	pci_read_config_byte (pcidev, VIA_PNP_CONTROL, &tmp8);
+	pci_write_config_byte (pcidev, VIA_PNP_CONTROL, tmp8);
+	
+	switch ((tmp8 >> 6) & 0x03) {
+		case 0: sb_irq = 5; break;
+		case 1: sb_irq = 7; break;
+		case 2: sb_irq = 9; break;
+		case 3: sb_irq = 10; break;
+		default: /* do nothing */ break;
+	}
+	switch ((tmp8 >> 4) & 0x03) {
+		case 0: sb_dma = 0; break;
+		case 1: sb_dma = 1; break;
+		case 2: sb_dma = 2; break;
+		case 3: sb_dma = 3; break;
+		default: /* do nothing */ break;
+	}
+	switch ((tmp8 >> 2) & 0x03) {
+		case 0: midi_base = 0x300; break;
+		case 1: midi_base = 0x310; break;
+		case 2: midi_base = 0x320; break;
+		case 3: midi_base = 0x330; break;
+		default: /* do nothing */ break;
+	}
+	switch (tmp8 & 0x03) {
+		case 0: sb_io_base = 0x220; break;
+		case 1: sb_io_base = 0x240; break;
+		case 2: sb_io_base = 0x260; break;
+		case 3: sb_io_base = 0x280; break;
+		default: /* do nothing */ break;
+	}
+
+	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);
+		
+	sb_data[cards].card_subtype = MDL_SBPRO;
+	sb_data[cards].io_base = sb_io_base;
+	sb_data[cards].irq = sb_irq;
+	sb_data[cards].dma = sb_dma;
+	
+	opl3_data[cards].io_base = midi_base;
+	
+	/* register legacy SoundBlaster Pro */
+	if (!via_probe_sb (&sb_data[cards])) {
+		printk (KERN_ERR PFX
+			"SB probe @ 0x%X failed, aborting\n",
+			sb_io_base);
+		return -1;
+	}
+	via_attach_sb (&sb_data[cards]);
+
+	/* register legacy MIDI */
+	if (!via_probe_midi (&opl3_data[cards])) {
+		printk (KERN_ERR PFX
+			"MIDI probe @ 0x%X failed, aborting\n",
+			midi_base);
+		via_unload_sb (&sb_data[cards], 0);
+		return -1;
+	}
+	via_attach_midi (&opl3_data[cards]);
+
+	cards++;	
+	return 0;
+}
+
+
+/*
+ * 	This loop walks the PCI configuration database and finds where
+ *	the sound cards are.
+ */
+ 
+static int __init probe_via82cxxx (void)
+{
+	struct pci_dev *pcidev = NULL;
+
+	while ((pcidev = pci_find_device (PCI_VENDOR_ID_VIA,
+					  PCI_DEVICE_ID_VIA_82C686_5,
+					  pcidev)) != NULL) {
+
+		  if (via82cxxx_install (pcidev) != 0) {
+			  printk (KERN_ERR PFX "audio init failed\n");
+			  return -1;
+		  }
+
+		  if (cards == MAX_CARDS) {
+		  	  printk (KERN_DEBUG PFX "maximum number of cards reached\n");
+			  break;
+		  }
+	}
+
+	return 0;
+}
+
+
+/*
+ *	This function is called when the user or kernel loads the 
+ *	module into memory.
+ */
+
+
+static int __init init_via82cxxx_module(void)
+{
+	if (!pci_present ()) {
+		printk (KERN_DEBUG PFX "PCI not present, exiting\n");
+		return -ENODEV;
+	}
+
+	if (probe_via82cxxx() != 0) {
+		printk(KERN_ERR PFX "probe failed, aborting\n");
+		/* XXX unload cards registered so far, if any */
+		return -ENODEV;
+	}
+
+	if (cards == 0) {
+		printk(KERN_DEBUG PFX "No chips found, aborting\n");
+		return -ENODEV;
+	}
+
+	printk (KERN_INFO PFX VIA_CARD_NAME " loaded\n");
+	
+	/*
+	 *	Binds us to the sound subsystem	
+	 */
+	SOUND_LOCK;
+	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)
+{
+	int i;
+	
+	for (i = 0; i < cards; i++)
+		via_unload_sb (&sb_data[i], 1);
+
+	/*
+	 *	Final clean up with the sound layer
+	 */
+	SOUND_LOCK_END;
+}
+
+module_init(init_via82cxxx_module);
+module_exit(cleanup_via82cxxx_module);
+