diff options
Diffstat (limited to 'drivers/sound/via82cxxx.c')
| -rw-r--r-- | drivers/sound/via82cxxx.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/sound/via82cxxx.c b/drivers/sound/via82cxxx.c new file mode 100644 index 000000000..79d87e2e0 --- /dev/null +++ b/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); + |