306 lines
7.1 KiB
C
306 lines
7.1 KiB
C
/*
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* cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
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*
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* (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
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* (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
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*
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* This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
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* mess with it a bit. The chip seems to have to have trouble with full duplex
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* mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
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* simultaneously play back audio at 16bit 44100kHz, the device actually plays
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* back in the same format in which it is capturing. By forcing the chip to
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* always play/capture in 16/44100, we can let alsa-lib convert the samples and
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* that way we can hack up some full duplex audio.
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*
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* XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
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* The older version (VSA1) provides fairly good soundblaster emulation
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* although there are a couple of bugs: large DMA buffers break record,
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* and the MPU event handling seems suspect. VSA2 allows the native driver
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* to control the AC97 audio engine directly and requires a different driver.
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*
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* Thanks to National Semiconductor for providing the needed information
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* on the XpressAudio(tm) internals.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* TO DO:
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* Investigate whether we can portably support Cognac (5520) in the
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* same manner.
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*/
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#include <linux/delay.h>
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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#include <sound/core.h>
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#include <sound/sb.h>
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#include <sound/initval.h>
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MODULE_AUTHOR("Ash Willis");
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MODULE_DESCRIPTION("CS5530 Audio");
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MODULE_LICENSE("GPL");
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
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static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
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struct snd_cs5530 {
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struct snd_card *card;
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struct pci_dev *pci;
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struct snd_sb *sb;
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unsigned long pci_base;
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};
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static struct pci_device_id snd_cs5530_ids[] = {
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{PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
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PCI_ANY_ID, 0, 0},
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{0,}
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};
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MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
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static int snd_cs5530_free(struct snd_cs5530 *chip)
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{
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pci_release_regions(chip->pci);
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pci_disable_device(chip->pci);
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kfree(chip);
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return 0;
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}
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static int snd_cs5530_dev_free(struct snd_device *device)
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{
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struct snd_cs5530 *chip = device->device_data;
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return snd_cs5530_free(chip);
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}
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static void __devexit snd_cs5530_remove(struct pci_dev *pci)
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{
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snd_card_free(pci_get_drvdata(pci));
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pci_set_drvdata(pci, NULL);
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}
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static u8 __devinit snd_cs5530_mixer_read(unsigned long io, u8 reg)
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{
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outb(reg, io + 4);
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udelay(20);
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reg = inb(io + 5);
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udelay(20);
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return reg;
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}
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static int __devinit snd_cs5530_create(struct snd_card *card,
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struct pci_dev *pci,
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struct snd_cs5530 **rchip)
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{
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struct snd_cs5530 *chip;
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unsigned long sb_base;
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u8 irq, dma8, dma16 = 0;
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u16 map;
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void __iomem *mem;
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int err;
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static struct snd_device_ops ops = {
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.dev_free = snd_cs5530_dev_free,
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};
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*rchip = NULL;
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err = pci_enable_device(pci);
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if (err < 0)
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return err;
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chip = kzalloc(sizeof(*chip), GFP_KERNEL);
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if (chip == NULL) {
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pci_disable_device(pci);
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return -ENOMEM;
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}
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chip->card = card;
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chip->pci = pci;
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err = pci_request_regions(pci, "CS5530");
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if (err < 0) {
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kfree(chip);
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pci_disable_device(pci);
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return err;
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}
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chip->pci_base = pci_resource_start(pci, 0);
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mem = pci_ioremap_bar(pci, 0);
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if (mem == NULL) {
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kfree(chip);
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pci_disable_device(pci);
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return -EBUSY;
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}
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map = readw(mem + 0x18);
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iounmap(mem);
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/* Map bits
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0:1 * 0x20 + 0x200 = sb base
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2 sb enable
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3 adlib enable
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5 MPU enable 0x330
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6 MPU enable 0x300
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The other bits may be used internally so must be masked */
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sb_base = 0x220 + 0x20 * (map & 3);
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if (map & (1<<2))
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printk(KERN_INFO "CS5530: XpressAudio at 0x%lx\n", sb_base);
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else {
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printk(KERN_ERR "Could not find XpressAudio!\n");
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snd_cs5530_free(chip);
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return -ENODEV;
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}
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if (map & (1<<5))
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printk(KERN_INFO "CS5530: MPU at 0x300\n");
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else if (map & (1<<6))
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printk(KERN_INFO "CS5530: MPU at 0x330\n");
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irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
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dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
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if (dma8 & 0x20)
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dma16 = 5;
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else if (dma8 & 0x40)
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dma16 = 6;
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else if (dma8 & 0x80)
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dma16 = 7;
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else {
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printk(KERN_ERR "CS5530: No 16bit DMA enabled\n");
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snd_cs5530_free(chip);
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return -ENODEV;
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}
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if (dma8 & 0x01)
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dma8 = 0;
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else if (dma8 & 02)
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dma8 = 1;
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else if (dma8 & 0x08)
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dma8 = 3;
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else {
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printk(KERN_ERR "CS5530: No 8bit DMA enabled\n");
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snd_cs5530_free(chip);
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return -ENODEV;
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}
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if (irq & 1)
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irq = 9;
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else if (irq & 2)
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irq = 5;
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else if (irq & 4)
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irq = 7;
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else if (irq & 8)
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irq = 10;
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else {
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printk(KERN_ERR "CS5530: SoundBlaster IRQ not set\n");
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snd_cs5530_free(chip);
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return -ENODEV;
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}
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printk(KERN_INFO "CS5530: IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8,
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dma16);
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err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
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dma16, SB_HW_CS5530, &chip->sb);
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if (err < 0) {
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printk(KERN_ERR "CS5530: Could not create SoundBlaster\n");
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snd_cs5530_free(chip);
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return err;
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}
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err = snd_sb16dsp_pcm(chip->sb, 0, &chip->sb->pcm);
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if (err < 0) {
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printk(KERN_ERR "CS5530: Could not create PCM\n");
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snd_cs5530_free(chip);
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return err;
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}
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err = snd_sbmixer_new(chip->sb);
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if (err < 0) {
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printk(KERN_ERR "CS5530: Could not create Mixer\n");
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snd_cs5530_free(chip);
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return err;
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}
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err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
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if (err < 0) {
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snd_cs5530_free(chip);
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return err;
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}
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snd_card_set_dev(card, &pci->dev);
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*rchip = chip;
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return 0;
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}
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static int __devinit snd_cs5530_probe(struct pci_dev *pci,
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const struct pci_device_id *pci_id)
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{
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static int dev;
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struct snd_card *card;
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struct snd_cs5530 *chip = NULL;
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int err;
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if (dev >= SNDRV_CARDS)
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return -ENODEV;
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if (!enable[dev]) {
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dev++;
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return -ENOENT;
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}
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card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
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if (card == NULL)
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return -ENOMEM;
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err = snd_cs5530_create(card, pci, &chip);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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strcpy(card->driver, "CS5530");
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strcpy(card->shortname, "CS5530 Audio");
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sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
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err = snd_card_register(card);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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pci_set_drvdata(pci, card);
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dev++;
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return 0;
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}
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static struct pci_driver driver = {
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.name = "CS5530_Audio",
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.id_table = snd_cs5530_ids,
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.probe = snd_cs5530_probe,
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.remove = __devexit_p(snd_cs5530_remove),
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};
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static int __init alsa_card_cs5530_init(void)
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{
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return pci_register_driver(&driver);
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}
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static void __exit alsa_card_cs5530_exit(void)
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{
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pci_unregister_driver(&driver);
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}
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module_init(alsa_card_cs5530_init)
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module_exit(alsa_card_cs5530_exit)
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