diff options
Diffstat (limited to 'sound/pci/cs5530.c')
| -rw-r--r-- | sound/pci/cs5530.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/sound/pci/cs5530.c b/sound/pci/cs5530.c new file mode 100644 index 0000000000..93ff029e65 --- /dev/null +++ b/sound/pci/cs5530.c @@ -0,0 +1,229 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * cs5530.c - Initialisation code for Cyrix/NatSemi VSA1 softaudio + * + * (C) Copyright 2007 Ash Willis <ashwillis@programmer.net> + * (C) Copyright 2003 Red Hat Inc <alan@lxorguk.ukuu.org.uk> + * + * This driver was ported (shamelessly ripped ;) from oss/kahlua.c but I did + * mess with it a bit. The chip seems to have to have trouble with full duplex + * mode. If we're recording in 8bit 8000kHz, say, and we then attempt to + * simultaneously play back audio at 16bit 44100kHz, the device actually plays + * back in the same format in which it is capturing. By forcing the chip to + * always play/capture in 16/44100, we can let alsa-lib convert the samples and + * that way we can hack up some full duplex audio. + * + * XpressAudio(tm) is used on the Cyrix MediaGX (now NatSemi Geode) systems. + * The older version (VSA1) provides fairly good soundblaster emulation + * although there are a couple of bugs: large DMA buffers break record, + * and the MPU event handling seems suspect. VSA2 allows the native driver + * to control the AC97 audio engine directly and requires a different driver. + * + * Thanks to National Semiconductor for providing the needed information + * on the XpressAudio(tm) internals. + * + * TO DO: + * Investigate whether we can portably support Cognac (5520) in the + * same manner. + */ + +#include <linux/delay.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/sb.h> +#include <sound/initval.h> + +MODULE_AUTHOR("Ash Willis"); +MODULE_DESCRIPTION("CS5530 Audio"); +MODULE_LICENSE("GPL"); + +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; +static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; + +module_param_array(index, int, NULL, 0444); +MODULE_PARM_DESC(index, "Index value for CS5530 Audio driver."); +module_param_array(id, charp, NULL, 0444); +MODULE_PARM_DESC(id, "ID string for CS5530 Audio driver."); +module_param_array(enable, bool, NULL, 0444); +MODULE_PARM_DESC(enable, "Enable CS5530 Audio driver."); + +struct snd_cs5530 { + struct snd_card *card; + struct pci_dev *pci; + struct snd_sb *sb; + unsigned long pci_base; +}; + +static const struct pci_device_id snd_cs5530_ids[] = { + {PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_AUDIO, PCI_ANY_ID, + PCI_ANY_ID, 0, 0}, + {0,} +}; + +MODULE_DEVICE_TABLE(pci, snd_cs5530_ids); + +static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg) +{ + outb(reg, io + 4); + udelay(20); + reg = inb(io + 5); + udelay(20); + return reg; +} + +static int snd_cs5530_create(struct snd_card *card, + struct pci_dev *pci) +{ + struct snd_cs5530 *chip = card->private_data; + unsigned long sb_base; + u8 irq, dma8, dma16 = 0; + u16 map; + void __iomem *mem; + int err; + + err = pcim_enable_device(pci); + if (err < 0) + return err; + + chip->card = card; + chip->pci = pci; + + err = pcim_iomap_regions(pci, 1 << 0, "CS5530"); + if (err < 0) + return err; + chip->pci_base = pci_resource_start(pci, 0); + mem = pcim_iomap_table(pci)[0]; + map = readw(mem + 0x18); + + /* Map bits + 0:1 * 0x20 + 0x200 = sb base + 2 sb enable + 3 adlib enable + 5 MPU enable 0x330 + 6 MPU enable 0x300 + + The other bits may be used internally so must be masked */ + + sb_base = 0x220 + 0x20 * (map & 3); + + if (map & (1<<2)) + dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base); + else { + dev_err(card->dev, "Could not find XpressAudio!\n"); + return -ENODEV; + } + + if (map & (1<<5)) + dev_info(card->dev, "MPU at 0x300\n"); + else if (map & (1<<6)) + dev_info(card->dev, "MPU at 0x330\n"); + + irq = snd_cs5530_mixer_read(sb_base, 0x80) & 0x0F; + dma8 = snd_cs5530_mixer_read(sb_base, 0x81); + + if (dma8 & 0x20) + dma16 = 5; + else if (dma8 & 0x40) + dma16 = 6; + else if (dma8 & 0x80) + dma16 = 7; + else { + dev_err(card->dev, "No 16bit DMA enabled\n"); + return -ENODEV; + } + + if (dma8 & 0x01) + dma8 = 0; + else if (dma8 & 02) + dma8 = 1; + else if (dma8 & 0x08) + dma8 = 3; + else { + dev_err(card->dev, "No 8bit DMA enabled\n"); + return -ENODEV; + } + + if (irq & 1) + irq = 9; + else if (irq & 2) + irq = 5; + else if (irq & 4) + irq = 7; + else if (irq & 8) + irq = 10; + else { + dev_err(card->dev, "SoundBlaster IRQ not set\n"); + return -ENODEV; + } + + dev_info(card->dev, "IRQ: %d DMA8: %d DMA16: %d\n", irq, dma8, dma16); + + err = snd_sbdsp_create(card, sb_base, irq, snd_sb16dsp_interrupt, dma8, + dma16, SB_HW_CS5530, &chip->sb); + if (err < 0) { + dev_err(card->dev, "Could not create SoundBlaster\n"); + return err; + } + + err = snd_sb16dsp_pcm(chip->sb, 0); + if (err < 0) { + dev_err(card->dev, "Could not create PCM\n"); + return err; + } + + err = snd_sbmixer_new(chip->sb); + if (err < 0) { + dev_err(card->dev, "Could not create Mixer\n"); + return err; + } + + return 0; +} + +static int snd_cs5530_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + static int dev; + struct snd_card *card; + struct snd_cs5530 *chip; + int err; + + if (dev >= SNDRV_CARDS) + return -ENODEV; + if (!enable[dev]) { + dev++; + return -ENOENT; + } + + err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE, + sizeof(*chip), &card); + if (err < 0) + return err; + chip = card->private_data; + + err = snd_cs5530_create(card, pci); + if (err < 0) + return err; + + strcpy(card->driver, "CS5530"); + strcpy(card->shortname, "CS5530 Audio"); + sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base); + + err = snd_card_register(card); + if (err < 0) + return err; + pci_set_drvdata(pci, card); + dev++; + return 0; +} + +static struct pci_driver cs5530_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_cs5530_ids, + .probe = snd_cs5530_probe, +}; + +module_pci_driver(cs5530_driver); |