forked from luck/tmp_suning_uos_patched
[ALSA] nm256 - Fix PM and irq handling
NM256 driver - Fixed the PCM resume - restoring the rate setting - Fixed the handling of buggy irqs - Dynamically acquire/release irq handler to make the driver more robust to unknown irq storms (as OSS driver does). Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
Jaroslav Kysela
parent
1cfe43d21b
commit
1204de32d0
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@ -189,6 +189,7 @@ struct snd_nm256_stream {
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nm256_t *chip;
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snd_pcm_substream_t *substream;
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int running;
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int suspended;
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u32 buf; /* offset from chip->buffer */
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int bufsize; /* buffer size in bytes */
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@ -231,8 +232,10 @@ struct snd_nm256 {
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int mixer_status_mask; /* bit mask to test the mixer status */
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int irq;
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int irq_acks;
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irqreturn_t (*interrupt)(int, void *, struct pt_regs *);
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int badintrcount; /* counter to check bogus interrupts */
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struct semaphore irq_mutex;
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nm256_stream_t streams[2];
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@ -464,6 +467,37 @@ snd_nm256_set_format(nm256_t *chip, nm256_stream_t *s, snd_pcm_substream_t *subs
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}
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}
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/* acquire interrupt */
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static int snd_nm256_acquire_irq(nm256_t *chip)
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{
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down(&chip->irq_mutex);
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if (chip->irq < 0) {
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if (request_irq(chip->pci->irq, chip->interrupt, SA_INTERRUPT|SA_SHIRQ,
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chip->card->driver, (void*)chip)) {
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snd_printk("unable to grab IRQ %d\n", chip->pci->irq);
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up(&chip->irq_mutex);
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return -EBUSY;
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}
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chip->irq = chip->pci->irq;
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}
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chip->irq_acks++;
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up(&chip->irq_mutex);
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return 0;
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}
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/* release interrupt */
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static void snd_nm256_release_irq(nm256_t *chip)
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{
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down(&chip->irq_mutex);
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if (chip->irq_acks > 0)
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chip->irq_acks--;
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if (chip->irq_acks == 0 && chip->irq >= 0) {
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free_irq(chip->irq, (void*)chip);
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chip->irq = -1;
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}
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up(&chip->irq_mutex);
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}
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/*
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* start / stop
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*/
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@ -538,15 +572,19 @@ snd_nm256_playback_trigger(snd_pcm_substream_t *substream, int cmd)
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spin_lock(&chip->reg_lock);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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s->suspended = 0;
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/* fallthru */
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case SNDRV_PCM_TRIGGER_START:
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if (! s->running) {
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snd_nm256_playback_start(chip, s, substream);
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s->running = 1;
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}
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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s->suspended = 1;
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/* fallthru */
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case SNDRV_PCM_TRIGGER_STOP:
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if (s->running) {
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snd_nm256_playback_stop(chip);
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s->running = 0;
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@ -818,6 +856,8 @@ snd_nm256_playback_open(snd_pcm_substream_t *substream)
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{
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nm256_t *chip = snd_pcm_substream_chip(substream);
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if (snd_nm256_acquire_irq(chip) < 0)
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return -EBUSY;
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snd_nm256_setup_stream(chip, &chip->streams[SNDRV_PCM_STREAM_PLAYBACK],
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substream, &snd_nm256_playback);
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return 0;
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@ -828,6 +868,8 @@ snd_nm256_capture_open(snd_pcm_substream_t *substream)
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{
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nm256_t *chip = snd_pcm_substream_chip(substream);
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if (snd_nm256_acquire_irq(chip) < 0)
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return -EBUSY;
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snd_nm256_setup_stream(chip, &chip->streams[SNDRV_PCM_STREAM_CAPTURE],
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substream, &snd_nm256_capture);
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return 0;
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@ -839,6 +881,9 @@ snd_nm256_capture_open(snd_pcm_substream_t *substream)
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static int
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snd_nm256_playback_close(snd_pcm_substream_t *substream)
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{
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nm256_t *chip = snd_pcm_substream_chip(substream);
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snd_nm256_release_irq(chip);
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return 0;
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}
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@ -846,6 +891,9 @@ snd_nm256_playback_close(snd_pcm_substream_t *substream)
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static int
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snd_nm256_capture_close(snd_pcm_substream_t *substream)
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{
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nm256_t *chip = snd_pcm_substream_chip(substream);
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snd_nm256_release_irq(chip);
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return 0;
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}
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@ -915,18 +963,16 @@ snd_nm256_pcm(nm256_t *chip, int device)
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static void
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snd_nm256_init_chip(nm256_t *chip)
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{
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spin_lock_irq(&chip->reg_lock);
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/* Reset everything. */
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snd_nm256_writeb(chip, 0x0, 0x11);
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snd_nm256_writew(chip, 0x214, 0);
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/* stop sounds.. */
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//snd_nm256_playback_stop(chip);
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//snd_nm256_capture_stop(chip);
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spin_unlock_irq(&chip->reg_lock);
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}
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static inline void
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static irqreturn_t
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snd_nm256_intr_check(nm256_t *chip)
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{
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if (chip->badintrcount++ > 1000) {
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@ -947,7 +993,9 @@ snd_nm256_intr_check(nm256_t *chip)
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if (chip->streams[SNDRV_PCM_STREAM_CAPTURE].running)
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snd_nm256_capture_stop(chip);
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chip->badintrcount = 0;
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return IRQ_HANDLED;
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}
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return IRQ_NONE;
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}
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/*
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@ -969,10 +1017,8 @@ snd_nm256_interrupt(int irq, void *dev_id, struct pt_regs *dummy)
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status = snd_nm256_readw(chip, NM_INT_REG);
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/* Not ours. */
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if (status == 0) {
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snd_nm256_intr_check(chip);
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return IRQ_NONE;
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}
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if (status == 0)
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return snd_nm256_intr_check(chip);
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chip->badintrcount = 0;
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@ -1036,10 +1082,8 @@ snd_nm256_interrupt_zx(int irq, void *dev_id, struct pt_regs *dummy)
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status = snd_nm256_readl(chip, NM_INT_REG);
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/* Not ours. */
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if (status == 0) {
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snd_nm256_intr_check(chip);
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return IRQ_NONE;
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}
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if (status == 0)
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return snd_nm256_intr_check(chip);
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chip->badintrcount = 0;
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@ -1192,7 +1236,7 @@ snd_nm256_mixer(nm256_t *chip)
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AC97_PC_BEEP, AC97_PHONE, AC97_MIC, AC97_LINE, AC97_CD,
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AC97_VIDEO, AC97_AUX, AC97_PCM, AC97_REC_SEL,
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AC97_REC_GAIN, AC97_GENERAL_PURPOSE, AC97_3D_CONTROL,
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AC97_EXTENDED_ID,
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/*AC97_EXTENDED_ID,*/
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AC97_VENDOR_ID1, AC97_VENDOR_ID2,
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-1
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};
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@ -1206,6 +1250,7 @@ snd_nm256_mixer(nm256_t *chip)
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for (i = 0; mixer_regs[i] >= 0; i++)
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set_bit(mixer_regs[i], ac97.reg_accessed);
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ac97.private_data = chip;
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pbus->no_vra = 1;
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err = snd_ac97_mixer(pbus, &ac97, &chip->ac97);
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if (err < 0)
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return err;
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@ -1281,6 +1326,7 @@ static int nm256_suspend(snd_card_t *card, pm_message_t state)
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static int nm256_resume(snd_card_t *card)
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{
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nm256_t *chip = card->pm_private_data;
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int i;
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/* Perform a full reset on the hardware */
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pci_enable_device(chip->pci);
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@ -1289,6 +1335,15 @@ static int nm256_resume(snd_card_t *card)
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/* restore ac97 */
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snd_ac97_resume(chip->ac97);
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for (i = 0; i < 2; i++) {
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nm256_stream_t *s = &chip->streams[i];
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if (s->substream && s->suspended) {
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spin_lock_irq(&chip->reg_lock);
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snd_nm256_set_format(chip, s, s->substream);
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spin_unlock_irq(&chip->reg_lock);
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}
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}
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return 0;
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}
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#endif /* CONFIG_PM */
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@ -1360,6 +1415,7 @@ snd_nm256_create(snd_card_t *card, struct pci_dev *pci,
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chip->use_cache = usecache;
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spin_lock_init(&chip->reg_lock);
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chip->irq = -1;
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init_MUTEX(&chip->irq_mutex);
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chip->streams[SNDRV_PCM_STREAM_PLAYBACK].bufsize = play_bufsize;
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chip->streams[SNDRV_PCM_STREAM_CAPTURE].bufsize = capt_bufsize;
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@ -1470,15 +1526,6 @@ snd_nm256_create(snd_card_t *card, struct pci_dev *pci,
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chip->coeff_buf[SNDRV_PCM_STREAM_CAPTURE] = addr;
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}
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/* acquire interrupt */
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if (request_irq(pci->irq, chip->interrupt, SA_INTERRUPT|SA_SHIRQ,
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card->driver, (void*)chip)) {
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err = -EBUSY;
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snd_printk("unable to grab IRQ %d\n", pci->irq);
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goto __error;
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}
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chip->irq = pci->irq;
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/* Fixed setting. */
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chip->mixer_base = NM_MIXER_OFFSET;
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