--- /dev/null
+/*
+ * Driver for audio on multifunction CS5535 companion device
+ * Copyright (C) Jaya Kumar
+ *
+ * Based on Jaroslav Kysela and Takashi Iwai's examples.
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ * 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 of the License, 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+#include <asm/io.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/rawmidi.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/asoundef.h>
+#include "cs5535audio.h"
+
+#define DRIVER_NAME "cs5535audio"
+
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+static struct pci_device_id snd_cs5535audio_ids[] __devinitdata = {
+ { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
+ { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
+ {}
+};
+
+MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
+
+static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long timeout)
+{
+ unsigned int tmp;
+ do {
+ tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
+ if (!(tmp & CMD_NEW))
+ break;
+ udelay(1);
+ } while (--timeout);
+ if (!timeout)
+ snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
+}
+
+static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au,
+ unsigned short reg)
+{
+ unsigned int regdata;
+ unsigned int timeout;
+ unsigned int val;
+
+ regdata = ((unsigned int) reg) << 24;
+ regdata |= ACC_CODEC_CNTL_RD_CMD;
+ regdata |= CMD_NEW;
+
+ cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
+ wait_till_cmd_acked(cs5535au, 50);
+
+ timeout = 50;
+ do {
+ val = cs_readl(cs5535au, ACC_CODEC_STATUS);
+ if ((val & STS_NEW) && reg == (val >> 24))
+ break;
+ udelay(1);
+ } while (--timeout);
+ if (!timeout)
+ snd_printk(KERN_ERR "Failure reading cs5535 codec\n");
+
+ return (unsigned short) val;
+}
+
+static void snd_cs5535audio_codec_write(struct cs5535audio *cs5535au,
+ unsigned short reg, unsigned short val)
+{
+ unsigned int regdata;
+
+ regdata = ((unsigned int) reg) << 24;
+ regdata |= val;
+ regdata &= CMD_MASK;
+ regdata |= CMD_NEW;
+ regdata &= ACC_CODEC_CNTL_WR_CMD;
+
+ cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
+ wait_till_cmd_acked(cs5535au, 50);
+}
+
+static void snd_cs5535audio_ac97_codec_write(struct snd_ac97 *ac97,
+ unsigned short reg, unsigned short val)
+{
+ struct cs5535audio *cs5535au = ac97->private_data;
+ snd_cs5535audio_codec_write(cs5535au, reg, val);
+}
+
+static unsigned short snd_cs5535audio_ac97_codec_read(struct snd_ac97 *ac97,
+ unsigned short reg)
+{
+ struct cs5535audio *cs5535au = ac97->private_data;
+ return snd_cs5535audio_codec_read(cs5535au, reg);
+}
+
+static int snd_cs5535audio_mixer(struct cs5535audio *cs5535au)
+{
+ struct snd_card *card = cs5535au->card;
+ struct snd_ac97_bus *pbus;
+ struct snd_ac97_template ac97;
+ int err;
+ static struct snd_ac97_bus_ops ops = {
+ .write = snd_cs5535audio_ac97_codec_write,
+ .read = snd_cs5535audio_ac97_codec_read,
+ };
+
+ if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
+ return err;
+
+ memset(&ac97, 0, sizeof(ac97));
+ ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
+ ac97.private_data = cs5535au;
+ ac97.pci = cs5535au->pci;
+
+ if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
+ snd_printk(KERN_ERR "mixer failed\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static void process_bm0_irq(struct cs5535audio *cs5535au)
+{
+ u8 bm_stat;
+ spin_lock(&cs5535au->reg_lock);
+ bm_stat = cs_readb(cs5535au, ACC_BM0_STATUS);
+ spin_unlock(&cs5535au->reg_lock);
+ if (bm_stat & EOP) {
+ struct cs5535audio_dma *dma;
+ dma = cs5535au->playback_substream->runtime->private_data;
+ snd_pcm_period_elapsed(cs5535au->playback_substream);
+ } else {
+ snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
+ bm_stat);
+ }
+}
+
+static void process_bm1_irq(struct cs5535audio *cs5535au)
+{
+ u8 bm_stat;
+ spin_lock(&cs5535au->reg_lock);
+ bm_stat = cs_readb(cs5535au, ACC_BM1_STATUS);
+ spin_unlock(&cs5535au->reg_lock);
+ if (bm_stat & EOP) {
+ struct cs5535audio_dma *dma;
+ dma = cs5535au->capture_substream->runtime->private_data;
+ snd_pcm_period_elapsed(cs5535au->capture_substream);
+ }
+}
+
+static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ u16 acc_irq_stat;
+ u8 bm_stat;
+ unsigned char count;
+ struct cs5535audio *cs5535au = dev_id;
+
+ if (cs5535au == NULL)
+ return IRQ_NONE;
+
+ acc_irq_stat = cs_readw(cs5535au, ACC_IRQ_STATUS);
+
+ if (!acc_irq_stat)
+ return IRQ_NONE;
+ for (count = 0; count < 10; count++) {
+ if (acc_irq_stat & (1 << count)) {
+ switch (count) {
+ case IRQ_STS:
+ cs_readl(cs5535au, ACC_GPIO_STATUS);
+ break;
+ case WU_IRQ_STS:
+ cs_readl(cs5535au, ACC_GPIO_STATUS);
+ break;
+ case BM0_IRQ_STS:
+ process_bm0_irq(cs5535au);
+ break;
+ case BM1_IRQ_STS:
+ process_bm1_irq(cs5535au);
+ break;
+ case BM2_IRQ_STS:
+ bm_stat = cs_readb(cs5535au, ACC_BM2_STATUS);
+ break;
+ case BM3_IRQ_STS:
+ bm_stat = cs_readb(cs5535au, ACC_BM3_STATUS);
+ break;
+ case BM4_IRQ_STS:
+ bm_stat = cs_readb(cs5535au, ACC_BM4_STATUS);
+ break;
+ case BM5_IRQ_STS:
+ bm_stat = cs_readb(cs5535au, ACC_BM5_STATUS);
+ break;
+ case BM6_IRQ_STS:
+ bm_stat = cs_readb(cs5535au, ACC_BM6_STATUS);
+ break;
+ case BM7_IRQ_STS:
+ bm_stat = cs_readb(cs5535au, ACC_BM7_STATUS);
+ break;
+ default:
+ snd_printk(KERN_ERR "Unexpected irq src\n");
+ break;
+ }
+ }
+ }
+ return IRQ_HANDLED;
+}
+
+static int snd_cs5535audio_free(struct cs5535audio *cs5535au)
+{
+ synchronize_irq(cs5535au->irq);
+ pci_set_power_state(cs5535au->pci, 3);
+
+ if (cs5535au->irq >= 0)
+ free_irq(cs5535au->irq, cs5535au);
+
+ pci_release_regions(cs5535au->pci);
+ pci_disable_device(cs5535au->pci);
+ kfree(cs5535au);
+ return 0;
+}
+
+static int snd_cs5535audio_dev_free(struct snd_device *device)
+{
+ struct cs5535audio *cs5535au = device->device_data;
+ return snd_cs5535audio_free(cs5535au);
+}
+
+static int __devinit snd_cs5535audio_create(struct snd_card *card,
+ struct pci_dev *pci,
+ struct cs5535audio **rcs5535au)
+{
+ struct cs5535audio *cs5535au;
+
+ int err;
+ static struct snd_device_ops ops = {
+ .dev_free = snd_cs5535audio_dev_free,
+ };
+
+ *rcs5535au = NULL;
+ if ((err = pci_enable_device(pci)) < 0)
+ return err;
+
+ if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
+ pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
+ printk(KERN_WARNING "unable to get 32bit dma\n");
+ err = -ENXIO;
+ goto pcifail;
+ }
+
+ cs5535au = kzalloc(sizeof(*cs5535au), GFP_KERNEL);
+ if (cs5535au == NULL) {
+ err = -ENOMEM;
+ goto pcifail;
+ }
+
+ spin_lock_init(&cs5535au->reg_lock);
+ cs5535au->card = card;
+ cs5535au->pci = pci;
+ cs5535au->irq = -1;
+
+ if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
+ kfree(cs5535au);
+ goto pcifail;
+ }
+
+ cs5535au->port = pci_resource_start(pci, 0);
+
+ if (request_irq(pci->irq, snd_cs5535audio_interrupt,
+ SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", cs5535au)) {
+ snd_printk("unable to grab IRQ %d\n", pci->irq);
+ err = -EBUSY;
+ goto sndfail;
+ }
+
+ cs5535au->irq = pci->irq;
+ pci_set_master(pci);
+
+ if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
+ cs5535au, &ops)) < 0)
+ goto sndfail;
+
+ snd_card_set_dev(card, &pci->dev);
+
+ *rcs5535au = cs5535au;
+ return 0;
+
+sndfail: /* leave the device alive, just kill the snd */
+ snd_cs5535audio_free(cs5535au);
+ return err;
+
+pcifail:
+ pci_disable_device(pci);
+ return err;
+}
+
+static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ static int dev;
+ struct snd_card *card;
+ struct cs5535audio *cs5535au;
+ int err;
+
+ if (dev >= SNDRV_CARDS)
+ return -ENODEV;
+ if (!enable[dev]) {
+ dev++;
+ return -ENOENT;
+ }
+
+ card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+ if (card == NULL)
+ return -ENOMEM;
+
+ if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0)
+ goto probefail_out;
+
+ if ((err = snd_cs5535audio_mixer(cs5535au)) < 0)
+ goto probefail_out;
+
+ if ((err = snd_cs5535audio_pcm(cs5535au)) < 0)
+ goto probefail_out;
+
+ strcpy(card->driver, DRIVER_NAME);
+
+ strcpy(card->shortname, "CS5535 Audio");
+ sprintf(card->longname, "%s %s at 0x%lx, irq %i",
+ card->shortname, card->driver,
+ cs5535au->port, cs5535au->irq);
+
+ if ((err = snd_card_register(card)) < 0)
+ goto probefail_out;
+
+ pci_set_drvdata(pci, card);
+ dev++;
+ return 0;
+
+probefail_out:
+ snd_card_free(card);
+ return err;
+}
+
+static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
+{
+ snd_card_free(pci_get_drvdata(pci));
+ pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver driver = {
+ .name = DRIVER_NAME,
+ .id_table = snd_cs5535audio_ids,
+ .probe = snd_cs5535audio_probe,
+ .remove = __devexit_p(snd_cs5535audio_remove),
+};
+
+static int __init alsa_card_cs5535audio_init(void)
+{
+ return pci_register_driver(&driver);
+}
+
+static void __exit alsa_card_cs5535audio_exit(void)
+{
+ pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_cs5535audio_init)
+module_exit(alsa_card_cs5535audio_exit)
+
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("CS5535 Audio");
+MODULE_SUPPORTED_DEVICE("CS5535 Audio");
git://git.onelab.eu / linux-2.6.git / blobdiff