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-rw-r--r--sound/pci/cs5530.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/sound/pci/cs5530.c b/sound/pci/cs5530.c
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+// 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);