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linux-stable/sound/pci/cs5535audio/cs5535audio.c
Andres Salomon 4ea2416398 [ALSA] cs5535audio: drop unused bus master stuff 
We really only care about the first two bus masters (playback and capture).
There's no need to have unused BM code lying around, so let's get rid of it.
If for some reason we trigger an IRQ for some BM that we're not using.. well,
that warrants spitting out an error message (imo).

Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-10-16 15:59:54 +02:00

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/*
* Driver for audio on multifunction CS5535/6 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 char *ac97_quirk;
module_param(ac97_quirk, charp, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 board specific workarounds.");
static struct ac97_quirk ac97_quirks[] __devinitdata = {
#if 0 /* Not yet confirmed if all 5536 boards are HP only */
{
.subvendor = PCI_VENDOR_ID_AMD,
.subdevice = PCI_DEVICE_ID_AMD_CS5536_AUDIO,
.name = "AMD RDK",
.type = AC97_TUNE_HP_ONLY
},
#endif
{}
};
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;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " DRIVER_NAME);
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " DRIVER_NAME);
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " DRIVER_NAME);
static struct pci_device_id snd_cs5535audio_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO) },
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO) },
{}
};
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 codec reg 0x%x,"
"Last value=0x%x\n", reg, val);
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;
}
snd_ac97_tune_hardware(cs5535au->ac97, ac97_quirks, ac97_quirk);
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)
{
u16 acc_irq_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 < 4; 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;
default:
snd_printk(KERN_ERR "Unexpected irq src: "
"0x%x\n", acc_irq_stat);
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,
IRQF_SHARED, "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;
card->private_data = cs5535au;
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),
#ifdef CONFIG_PM
.suspend = snd_cs5535audio_suspend,
.resume = snd_cs5535audio_resume,
#endif
};
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");
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