--- /dev/null
+/*
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * 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 int snd_cs5530_free(struct snd_cs5530 *chip)
+{
+ pci_release_regions(chip->pci);
+ pci_disable_device(chip->pci);
+ kfree(chip);
+ return 0;
+}
+
+static int snd_cs5530_dev_free(struct snd_device *device)
+{
+ struct snd_cs5530 *chip = device->device_data;
+ return snd_cs5530_free(chip);
+}
+
+static void snd_cs5530_remove(struct pci_dev *pci)
+{
+ snd_card_free(pci_get_drvdata(pci));
+}
+
+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 **rchip)
+{
+ struct snd_cs5530 *chip;
+ unsigned long sb_base;
+ u8 irq, dma8, dma16 = 0;
+ u16 map;
+ void __iomem *mem;
+ int err;
+
+ static struct snd_device_ops ops = {
+ .dev_free = snd_cs5530_dev_free,
+ };
+ *rchip = NULL;
+
+ err = pci_enable_device(pci);
+ if (err < 0)
+ return err;
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL) {
+ pci_disable_device(pci);
+ return -ENOMEM;
+ }
+
+ chip->card = card;
+ chip->pci = pci;
+
+ err = pci_request_regions(pci, "CS5530");
+ if (err < 0) {
+ kfree(chip);
+ pci_disable_device(pci);
+ return err;
+ }
+ chip->pci_base = pci_resource_start(pci, 0);
+
+ mem = pci_ioremap_bar(pci, 0);
+ if (mem == NULL) {
+ snd_cs5530_free(chip);
+ return -EBUSY;
+ }
+
+ map = readw(mem + 0x18);
+ iounmap(mem);
+
+ /* 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");
+ snd_cs5530_free(chip);
+ 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");
+ snd_cs5530_free(chip);
+ 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");
+ snd_cs5530_free(chip);
+ 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");
+ snd_cs5530_free(chip);
+ 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");
+ snd_cs5530_free(chip);
+ return err;
+ }
+
+ err = snd_sb16dsp_pcm(chip->sb, 0);
+ if (err < 0) {
+ dev_err(card->dev, "Could not create PCM\n");
+ snd_cs5530_free(chip);
+ return err;
+ }
+
+ err = snd_sbmixer_new(chip->sb);
+ if (err < 0) {
+ dev_err(card->dev, "Could not create Mixer\n");
+ snd_cs5530_free(chip);
+ return err;
+ }
+
+ err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+ if (err < 0) {
+ snd_cs5530_free(chip);
+ return err;
+ }
+
+ *rchip = chip;
+ 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 = NULL;
+ int err;
+
+ if (dev >= SNDRV_CARDS)
+ return -ENODEV;
+ if (!enable[dev]) {
+ dev++;
+ return -ENOENT;
+ }
+
+ err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+ 0, &card);
+
+ if (err < 0)
+ return err;
+
+ err = snd_cs5530_create(card, pci, &chip);
+ if (err < 0) {
+ snd_card_free(card);
+ 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) {
+ snd_card_free(card);
+ 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,
+ .remove = snd_cs5530_remove,
+};
+
+module_pci_driver(cs5530_driver);
Code Review / kvmfornfv.git / blobdiff