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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio4 *5 * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>6 * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>7 *8 * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did9 * mess with it a bit. The chip seems to have to have trouble with full duplex10 * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to11 * simultaneously play back audio at 16bit 44100kHz, the device actually plays12 * back in the same format in which it is capturing. By forcing the chip to13 * always play/capture in 16/44100, we can let alsa-lib convert the samples and14 * that way we can hack up some full duplex audio. 15 * 16 * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.17 * The older version (VSA1) provides fairly good soundblaster emulation18 * although there are a couple of bugs: large DMA buffers break record,19 * and the MPU event handling seems suspect. VSA2 allows the native driver20 * to control the AC97 audio engine directly and requires a different driver.21 *22 * Thanks to National Semiconductor for providing the needed information23 * on the XpressAudio(tm) internals.24 *25 * TO DO:26 * Investigate whether we can portably support Cognac (5520) in the27 * same manner.28 */29 30#include <linux/delay.h>31#include <linux/module.h>32#include <linux/pci.h>33#include <linux/slab.h>34#include <sound/core.h>35#include <sound/sb.h>36#include <sound/initval.h>37 38MODULE_AUTHOR("Ash Willis");39MODULE_DESCRIPTION("CS5530 Audio");40MODULE_LICENSE("GPL");41 42static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;43static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;44static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;45 46module_param_array(index, int, NULL, 0444);47MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");48module_param_array(id, charp, NULL, 0444);49MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");50module_param_array(enable, bool, NULL, 0444);51MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");52 53struct snd_cs5530 {54 struct snd_card *card;55 struct pci_dev *pci;56 struct snd_sb *sb;57 unsigned long pci_base;58};59 60static const struct pci_device_id snd_cs5530_ids[] = {61 {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,62 PCI_ANY_ID, 0, 0},63 {0,}64};65 66MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);67 68static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)69{70 outb(reg, io + 4);71 udelay(20);72 reg = inb(io + 5);73 udelay(20);74 return reg;75}76 77static int snd_cs5530_create(struct snd_card *card,78 struct pci_dev *pci)79{80 struct snd_cs5530 *chip = card->private_data;81 unsigned long sb_base;82 u8 irq, dma8, dma16 = 0;83 u16 map;84 void __iomem *mem;85 int err;86 87 err = pcim_enable_device(pci);88 if (err < 0)89 return err;90 91 chip->card = card;92 chip->pci = pci;93 94 err = pcim_iomap_regions(pci, 1 << 0, "CS5530");95 if (err < 0)96 return err;97 chip->pci_base = pci_resource_start(pci, 0);98 mem = pcim_iomap_table(pci)[0];99 map = readw(mem + 0x18);100 101 /* Map bits102 0:1 * 0x20 + 0x200 = sb base103 2 sb enable104 3 adlib enable105 5 MPU enable 0x330106 6 MPU enable 0x300107 108 The other bits may be used internally so must be masked */109 110 sb_base = 0x220 + 0x20 * (map & 3);111 112 if (map & (1<<2))113 dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);114 else {115 dev_err(card->dev, "Could not find XpressAudio!\n");116 return -ENODEV;117 }118 119 if (map & (1<<5))120 dev_info(card->dev, "MPU at 0x300\n");121 else if (map & (1<<6))122 dev_info(card->dev, "MPU at 0x330\n");123 124 irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;125 dma8 = snd_cs5530_mixer_read(sb_base, 0x81);126 127 if (dma8 & 0x20)128 dma16 = 5;129 else if (dma8 & 0x40)130 dma16 = 6;131 else if (dma8 & 0x80)132 dma16 = 7;133 else {134 dev_err(card->dev, "No 16bit DMA enabled\n");135 return -ENODEV;136 }137 138 if (dma8 & 0x01)139 dma8 = 0;140 else if (dma8 & 02)141 dma8 = 1;142 else if (dma8 & 0x08)143 dma8 = 3;144 else {145 dev_err(card->dev, "No 8bit DMA enabled\n");146 return -ENODEV;147 }148 149 if (irq & 1)150 irq = 9;151 else if (irq & 2)152 irq = 5;153 else if (irq & 4)154 irq = 7;155 else if (irq & 8)156 irq = 10;157 else {158 dev_err(card->dev, "SoundBlaster IRQ not set\n");159 return -ENODEV;160 }161 162 dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);163 164 err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,165 dma16, SB_HW_CS5530, &chip->sb);166 if (err < 0) {167 dev_err(card->dev, "Could not create SoundBlaster\n");168 return err;169 }170 171 err = snd_sb16dsp_pcm(chip->sb, 0);172 if (err < 0) {173 dev_err(card->dev, "Could not create PCM\n");174 return err;175 }176 177 err = snd_sbmixer_new(chip->sb);178 if (err < 0) {179 dev_err(card->dev, "Could not create Mixer\n");180 return err;181 }182 183 return 0;184}185 186static int snd_cs5530_probe(struct pci_dev *pci,187 const struct pci_device_id *pci_id)188{189 static int dev;190 struct snd_card *card;191 struct snd_cs5530 *chip;192 int err;193 194 if (dev >= SNDRV_CARDS)195 return -ENODEV;196 if (!enable[dev]) {197 dev++;198 return -ENOENT;199 }200 201 err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,202 sizeof(*chip), &card);203 if (err < 0)204 return err;205 chip = card->private_data;206 207 err = snd_cs5530_create(card, pci);208 if (err < 0)209 return err;210 211 strcpy(card->driver, "CS5530");212 strcpy(card->shortname, "CS5530 Audio");213 sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);214 215 err = snd_card_register(card);216 if (err < 0)217 return err;218 pci_set_drvdata(pci, card);219 dev++;220 return 0;221}222 223static struct pci_driver cs5530_driver = {224 .name = KBUILD_MODNAME,225 .id_table = snd_cs5530_ids,226 .probe = snd_cs5530_probe,227};228 229module_pci_driver(cs5530_driver);230