| 1 | // SPDX-License-Identifier: GPL-2.0-or-later
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| 2 | /*
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| 3 | * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio
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| 4 | *
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| 5 | * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net>
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| 6 | * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk>
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| 7 | *
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| 8 | * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did
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| 9 | * mess with it a bit. The chip seems to have to have trouble with full duplex
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| 10 | * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to
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| 11 | * simultaneously play back audio at 16bit 44100kHz, the device actually plays
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| 12 | * back in the same format in which it is capturing. By forcing the chip to
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| 13 | * always play/capture in 16/44100, we can let alsa-lib convert the samples and
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| 14 | * that way we can hack up some full duplex audio.
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| 15 | *
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| 16 | * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems.
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| 17 | * The older version (VSA1) provides fairly good soundblaster emulation
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| 18 | * although there are a couple of bugs: large DMA buffers break record,
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| 19 | * and the MPU event handling seems suspect. VSA2 allows the native driver
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| 20 | * to control the AC97 audio engine directly and requires a different driver.
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| 21 | *
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| 22 | * Thanks to National Semiconductor for providing the needed information
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| 23 | * on the XpressAudio(tm) internals.
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| 24 | *
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| 25 | * TO DO:
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| 26 | * Investigate whether we can portably support Cognac (5520) in the
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| 27 | * same manner.
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| 28 | */
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| 29 |
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| 30 | #ifdef TARGET_OS2
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| 31 | #define KBUILD_MODNAME "cs5530"
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| 32 | #endif
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| 33 |
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| 34 | #include <linux/delay.h>
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| 35 | #include <linux/module.h>
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| 36 | #include <linux/pci.h>
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| 37 | #include <linux/slab.h>
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| 38 | #include <sound/core.h>
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| 39 | #include <sound/sb.h>
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| 40 | #include <sound/initval.h>
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| 41 |
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| 42 | MODULE_AUTHOR("Ash Willis");
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| 43 | MODULE_DESCRIPTION("CS5530 Audio");
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| 44 | MODULE_LICENSE("GPL");
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| 45 |
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| 46 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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| 47 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
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| 48 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
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| 49 |
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| 50 | module_param_array(index, int, NULL, 0444);
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| 51 | MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver.");
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| 52 | module_param_array(id, charp, NULL, 0444);
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| 53 | MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver.");
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| 54 | module_param_array(enable, bool, NULL, 0444);
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| 55 | MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver.");
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| 56 |
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| 57 | struct snd_cs5530 {
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| 58 | struct snd_card *card;
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| 59 | struct pci_dev *pci;
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| 60 | struct snd_sb *sb;
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| 61 | unsigned long pci_base;
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| 62 | };
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| 63 |
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| 64 | static const struct pci_device_id snd_cs5530_ids[] = {
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| 65 | {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID,
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| 66 | PCI_ANY_ID, 0, 0},
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| 67 | {0,}
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| 68 | };
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| 69 |
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| 70 | MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
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| 71 |
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| 72 | static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
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| 73 | {
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| 74 | outb(reg, io + 4);
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| 75 | udelay(20);
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| 76 | reg = inb(io + 5);
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| 77 | udelay(20);
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| 78 | return reg;
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| 79 | }
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| 80 |
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| 81 | static int snd_cs5530_create(struct snd_card *card,
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| 82 | struct pci_dev *pci)
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| 83 | {
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| 84 | struct snd_cs5530 *chip = card->private_data;
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| 85 | unsigned long sb_base;
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| 86 | u8 irq, dma8, dma16 = 0;
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| 87 | u16 map;
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| 88 | void __iomem *mem;
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| 89 | int err;
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| 90 |
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| 91 | err = pcim_enable_device(pci);
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| 92 | if (err < 0)
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| 93 | return err;
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| 94 |
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| 95 | chip->card = card;
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| 96 | chip->pci = pci;
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| 97 |
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| 98 | err = pcim_iomap_regions(pci, 1 << 0, "CS5530");
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| 99 | if (err < 0)
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| 100 | return err;
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| 101 | chip->pci_base = pci_resource_start(pci, 0);
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| 102 | mem = pcim_iomap_table(pci)[0];
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| 103 | map = readw(mem + 0x18);
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| 104 |
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| 105 | /* Map bits
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| 106 | 0:1 * 0x20 + 0x200 = sb base
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| 107 | 2 sb enable
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| 108 | 3 adlib enable
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| 109 | 5 MPU enable 0x330
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| 110 | 6 MPU enable 0x300
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| 111 |
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| 112 | The other bits may be used internally so must be masked */
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| 113 |
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| 114 | sb_base = 0x220 + 0x20 * (map & 3);
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| 115 |
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| 116 | if (map & (1<<2))
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| 117 | dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
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| 118 | else {
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| 119 | dev_err(card->dev, "Could not find XpressAudio!\n");
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| 120 | return -ENODEV;
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| 121 | }
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| 122 |
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| 123 | if (map & (1<<5))
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| 124 | dev_info(card->dev, "MPU at 0x300\n");
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| 125 | else if (map & (1<<6))
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| 126 | dev_info(card->dev, "MPU at 0x330\n");
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| 127 |
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| 128 | irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F;
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| 129 | dma8 = snd_cs5530_mixer_read(sb_base, 0x81);
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| 130 |
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| 131 | if (dma8 & 0x20)
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| 132 | dma16 = 5;
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| 133 | else if (dma8 & 0x40)
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| 134 | dma16 = 6;
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| 135 | else if (dma8 & 0x80)
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| 136 | dma16 = 7;
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| 137 | else {
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| 138 | dev_err(card->dev, "No 16bit DMA enabled\n");
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| 139 | return -ENODEV;
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| 140 | }
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| 141 |
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| 142 | if (dma8 & 0x01)
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| 143 | dma8 = 0;
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| 144 | else if (dma8 & 02)
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| 145 | dma8 = 1;
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| 146 | else if (dma8 & 0x08)
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| 147 | dma8 = 3;
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| 148 | else {
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| 149 | dev_err(card->dev, "No 8bit DMA enabled\n");
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| 150 | return -ENODEV;
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| 151 | }
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| 152 |
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| 153 | if (irq & 1)
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| 154 | irq = 9;
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| 155 | else if (irq & 2)
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| 156 | irq = 5;
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| 157 | else if (irq & 4)
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| 158 | irq = 7;
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| 159 | else if (irq & 8)
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| 160 | irq = 10;
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| 161 | else {
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| 162 | dev_err(card->dev, "SoundBlaster IRQ not set\n");
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| 163 | return -ENODEV;
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| 164 | }
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| 165 |
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| 166 | dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16);
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| 167 |
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| 168 | err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8,
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| 169 | dma16, SB_HW_CS5530, &chip->sb);
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| 170 | if (err < 0) {
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| 171 | dev_err(card->dev, "Could not create SoundBlaster\n");
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| 172 | return err;
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| 173 | }
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| 174 |
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| 175 | err = snd_sb16dsp_pcm(chip->sb, 0);
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| 176 | if (err < 0) {
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| 177 | dev_err(card->dev, "Could not create PCM\n");
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| 178 | return err;
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| 179 | }
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| 180 |
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| 181 | err = snd_sbmixer_new(chip->sb);
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| 182 | if (err < 0) {
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| 183 | dev_err(card->dev, "Could not create Mixer\n");
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| 184 | return err;
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| 185 | }
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| 186 |
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| 187 | return 0;
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| 188 | }
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| 189 |
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| 190 | static int snd_cs5530_probe(struct pci_dev *pci,
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| 191 | const struct pci_device_id *pci_id)
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| 192 | {
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| 193 | static int dev;
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| 194 | struct snd_card *card;
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| 195 | struct snd_cs5530 *chip;
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| 196 | int err;
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| 197 |
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| 198 | if (dev >= SNDRV_CARDS)
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| 199 | return -ENODEV;
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| 200 | if (!enable[dev]) {
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| 201 | dev++;
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| 202 | return -ENOENT;
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| 203 | }
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| 204 |
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| 205 | err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
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| 206 | sizeof(*chip), &card);
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| 207 | if (err < 0)
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| 208 | return err;
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| 209 | chip = card->private_data;
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| 210 |
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| 211 | err = snd_cs5530_create(card, pci);
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| 212 | if (err < 0)
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| 213 | return err;
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| 214 |
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| 215 | strcpy(card->driver, "CS5530");
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| 216 | strcpy(card->shortname, "CS5530 Audio");
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| 217 | sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
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| 218 |
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| 219 | err = snd_card_register(card);
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| 220 | if (err < 0)
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| 221 | return err;
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| 222 | pci_set_drvdata(pci, card);
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| 223 | dev++;
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| 224 | return 0;
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| 225 | }
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| 226 |
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| 227 | static struct pci_driver cs5530_driver = {
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| 228 | .name = KBUILD_MODNAME,
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| 229 | .id_table = snd_cs5530_ids,
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| 230 | .probe = snd_cs5530_probe,
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| 231 | };
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| 232 |
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| 233 | module_pci_driver(cs5530_driver);
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