Echoaudio - add suspend/resume support

diff -dup alsa-driver-1.0.22.1__orig//alsa-kernel/pci/echoaudio/echoaudio.c alsa-driver-1.0.22.1/alsa-kernel/pci/echoaudio/echoaudio.c
@@ -753,6 +753,8 @@ static int pcm_trigger(struct snd_pcm_su
 
 	spin_lock(&chip->lock);
 	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_RESUME:
+		DE_ACT(("pcm_trigger resume\n"));
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		DE_ACT(("pcm_trigger start\n"));

@@ -776,6 +778,8 @@ static int pcm_trigger(struct snd_pcm_su
 		err = start_transport(chip, channelmask,
 				      chip->pipe_cyclic_mask);
 		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		DE_ACT(("pcm_trigger suspend\n"));
 	case SNDRV_PCM_TRIGGER_STOP:
 		DE_ACT(("pcm_trigger stop\n"));
 		for (i = 0; i < DSP_MAXPIPES; i++) {

@@ -1951,18 +1955,27 @@ static __devinit int snd_echo_create(str
 		return err;
 	pci_set_master(pci);
 
-	/* allocate a chip-specific data */
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (!chip) {
-		pci_disable_device(pci);
-		return -ENOMEM;
+	/* Allocate chip if needed */
+	if (!*rchip) {
+		chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+		if (!chip) {
+			pci_disable_device(pci);
+			return -ENOMEM;
+		}
+		DE_INIT(("chip=%p\n", chip));
+		spin_lock_init(&chip->lock);
+		chip->card = card;
+		chip->pci = pci;
+		chip->irq = -1;
+		atomic_set(&chip->opencount, 0);
+		mutex_init(&chip->mode_mutex);
+		chip->can_set_rate = 1;
+	} else {
+		/* If this was called from the resume function, chip is
+		 * already allocated and it contains current card settings.
+		 */
+		chip = *rchip;
 	}
-	DE_INIT(("chip=%p\n", chip));
-
-	spin_lock_init(&chip->lock);
-	chip->card = card;
-	chip->pci = pci;
-	chip->irq = -1;
 
 	/* PCI resource allocation */
 	chip->dsp_registers_phys = pci_resource_start(pci, 0);

@@ -2002,7 +2015,9 @@ static __devinit int snd_echo_create(str
 	chip->comm_page = (struct comm_page *)chip->commpage_dma_buf.area;
 
 	err = init_hw(chip, chip->pci->device, chip->pci->subsystem_device);
-	if (err) {
+	if (err >= 0)
+		err = set_mixer_defaults(chip);
+	if (err < 0) {
 		DE_INIT(("init_hw err=%d\n", err));
 		snd_echo_free(chip);
 		return err;

@@ -2013,9 +2028,6 @@ static __devinit int snd_echo_create(str
 		snd_echo_free(chip);
 		return err;
 	}
-	atomic_set(&chip->opencount, 0);
-	mutex_init(&chip->mode_mutex);
-	chip->can_set_rate = 1;
 	*rchip = chip;
 	/* Init done ! */
 	return 0;

@@ -2048,6 +2060,7 @@ static int __devinit snd_echo_probe(stru
 
 	snd_card_set_dev(card, &pci->dev);
 
+	chip = NULL;	/* Tells snd_echo_create to allocate chip */
 	if ((err = snd_echo_create(card, pci, &chip)) < 0) {
 		snd_card_free(card);
 		return err;

@@ -2187,6 +2200,112 @@ ctl_error:
 
 
 
+#if defined(CONFIG_PM)
+
+static int snd_echo_suspend(struct pci_dev *pci, pm_message_t state)
+{
+	struct echoaudio *chip = pci_get_drvdata(pci);
+
+	DE_INIT(("suspend start\n"));
+	snd_pcm_suspend_all(chip->analog_pcm);
+	snd_pcm_suspend_all(chip->digital_pcm);
+
+#ifdef ECHOCARD_HAS_MIDI
+	/* This call can sleep */
+	if (chip->midi_out)
+		snd_echo_midi_output_trigger(chip->midi_out, 0);
+#endif
+	spin_lock_irq(&chip->lock);
+	if (wait_handshake(chip)) {
+		spin_unlock_irq(&chip->lock);
+		return -EIO;
+	}
+	clear_handshake(chip);
+	if (send_vector(chip, DSP_VC_GO_COMATOSE) < 0) {
+		spin_unlock_irq(&chip->lock);
+		return -EIO;
+	}
+	spin_unlock_irq(&chip->lock);
+
+	chip->dsp_code = NULL;
+	free_irq(chip->irq, chip);
+	chip->irq = -1;
+	pci_save_state(pci);
+	pci_disable_device(pci);
+
+	DE_INIT(("suspend done\n"));
+	return 0;
+}
+
+
+
+static int snd_echo_resume(struct pci_dev *pci)
+{
+	struct echoaudio *chip = pci_get_drvdata(pci);
+	struct comm_page *commpage, *commpage_bak;
+	u32 pipe_alloc_mask;
+	int err;
+
+	DE_INIT(("resume start\n"));
+	pci_restore_state(pci);
+	commpage_bak = kmalloc(sizeof(struct echoaudio), GFP_KERNEL);
+	commpage = chip->comm_page;
+	memcpy(commpage_bak, commpage, sizeof(struct comm_page));
+
+	err = init_hw(chip, chip->pci->device, chip->pci->subsystem_device);
+	if (err < 0) {
+		kfree(commpage_bak);
+		DE_INIT(("resume init_hw err=%d\n", err));
+		snd_echo_free(chip);
+		return err;
+	}
+	DE_INIT(("resume init OK\n"));
+
+	/* Temporarily set chip->pipe_alloc_mask=0 otherwise
+	 * restore_dsp_settings() fails.
+	 */
+	pipe_alloc_mask = chip->pipe_alloc_mask;
+	chip->pipe_alloc_mask = 0;
+	err = restore_dsp_rettings(chip);
+	chip->pipe_alloc_mask = pipe_alloc_mask;
+	if (err < 0) {
+		kfree(commpage_bak);
+		return err;
+	}
+	DE_INIT(("resume restore OK\n"));
+
+	memcpy(&commpage->audio_format, &commpage_bak->audio_format,
+		sizeof(commpage->audio_format));
+	memcpy(&commpage->sglist_addr, &commpage_bak->sglist_addr,
+		sizeof(commpage->sglist_addr));
+	memcpy(&commpage->midi_output, &commpage_bak->midi_output,
+		sizeof(commpage->midi_output));
+	kfree(commpage_bak);
+
+	if (request_irq(pci->irq, snd_echo_interrupt, IRQF_SHARED,
+			ECHOCARD_NAME, chip)) {
+		snd_echo_free(chip);
+		snd_printk(KERN_ERR "cannot grab irq\n");
+		return -EBUSY;
+	}
+	chip->irq = pci->irq;
+	DE_INIT(("resume irq=%d\n", chip->irq));
+
+#ifdef ECHOCARD_HAS_MIDI
+	if (chip->midi_input_enabled)
+		enable_midi_input(chip, TRUE);
+	if (chip->midi_out)
+		snd_echo_midi_output_trigger(chip->midi_out, 1);
+#endif
+
+	DE_INIT(("resume done\n"));
+	return 0;
+}
+
+#endif /* CONFIG_PM */
+
+
+
 static void __devexit snd_echo_remove(struct pci_dev *pci)
 {
 	struct echoaudio *chip;

@@ -2209,6 +2328,10 @@ static struct pci_driver driver = {
 	.id_table = snd_echo_ids,
 	.probe = snd_echo_probe,
 	.remove = __devexit_p(snd_echo_remove),
+#ifdef CONFIG_PM
+	.suspend = snd_echo_suspend,
+	.resume = snd_echo_resume,
+#endif /* CONFIG_PM */
 };
 
 

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diff -dup alsa-driver-1.0.22.1__orig//alsa-kernel/pci/echoaudio/echoaudio.h alsa-driver-1.0.22.1/alsa-kernel/pci/echoaudio/echoaudio.h
@@ -472,6 +472,8 @@ static void free_firmware(const struct f
 
 #ifdef ECHOCARD_HAS_MIDI
 static int enable_midi_input(struct echoaudio *chip, char enable);
+static void snd_echo_midi_output_trigger(
+			struct snd_rawmidi_substream *substream, int up);
 static int midi_service_irq(struct echoaudio *chip);
 static int __devinit snd_echo_midi_create(struct snd_card *card,
 					  struct echoaudio *chip);