pmac.c

Linux Kernel 2.6.9 for OMAP1710

	chip->freqs_ok = 0xff; /* all ok */
	chip->model = PMAC_AWACS;
	chip->can_byte_swap = 1;
	chip->can_duplex = 1;
	chip->can_capture = 1;
	chip->num_freqs = ARRAY_SIZE(awacs_freqs);
	chip->freq_table = awacs_freqs;

	chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */

	/* check machine type */
	if (machine_is_compatible("AAPL,3400/2400")
	    || machine_is_compatible("AAPL,3500"))
		chip->is_pbook_3400 = 1;
	else if (machine_is_compatible("PowerBook1,1")
		 || machine_is_compatible("AAPL,PowerBook1998"))
		chip->is_pbook_G3 = 1;
	chip->node = find_devices("awacs");
	if (chip->node)
		return 0; /* ok */

	/*
	 * powermac G3 models have a node called "davbus"
	 * with a child called "sound".
	 */
	chip->node = find_devices("davbus");
	/*
	 * if we didn't find a davbus device, try 'i2s-a' since
	 * this seems to be what iBooks have
	 */
	if (! chip->node)
		chip->node = find_devices("i2s-a");
	if (! chip->node)
		return -ENODEV;
	sound = find_devices("sound");
	while (sound && sound->parent != chip->node)
		sound = sound->next;
	if (! sound)
		return -ENODEV;
	prop = (unsigned int *) get_property(sound, "sub-frame", NULL);
	if (prop && *prop < 16)
		chip->subframe = *prop;
	/* This should be verified on older screamers */
	if (device_is_compatible(sound, "screamer")) {
		chip->model = PMAC_SCREAMER;
		// chip->can_byte_swap = 0; /* FIXME: check this */
	}
	if (device_is_compatible(sound, "burgundy")) {
		chip->model = PMAC_BURGUNDY;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (device_is_compatible(sound, "daca")) {
		chip->model = PMAC_DACA;
		chip->can_capture = 0;  /* no capture */
		chip->can_duplex = 0;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (device_is_compatible(sound, "tumbler")) {
		chip->model = PMAC_TUMBLER;
		chip->can_capture = 0;  /* no capture */
		chip->can_duplex = 0;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
		chip->freq_table = tumbler_freqs;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (device_is_compatible(sound, "snapper")) {
		chip->model = PMAC_SNAPPER;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
		chip->freq_table = tumbler_freqs;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (device_is_compatible(sound, "AOAKeylargo")) {
		/* Seems to support the stock AWACS frequencies, but has
		   a snapper mixer */
		chip->model = PMAC_SNAPPER;
		// chip->can_byte_swap = 0; /* FIXME: check this */
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	prop = (unsigned int *)get_property(sound, "device-id", NULL);
	if (prop)
		chip->device_id = *prop;
	chip->has_iic = (find_devices("perch") != NULL);

	detect_byte_swap(chip);

	/* look for a property saying what sample rates
	   are available */
	prop = (unsigned int *) get_property(sound, "sample-rates", &l);
	if (! prop)
		prop = (unsigned int *) get_property(sound, "output-frame-rates", &l);
	if (prop) {
		int i;
		chip->freqs_ok = 0;
		for (l /= sizeof(int); l > 0; --l) {
			unsigned int r = *prop++;
			/* Apple 'Fixed' format */
			if (r >= 0x10000)
				r >>= 16;
			for (i = 0; i < chip->num_freqs; ++i) {
				if (r == chip->freq_table[i]) {
					chip->freqs_ok |= (1 << i);
					break;
				}
			}
		}
	} else {
		/* assume only 44.1khz */
		chip->freqs_ok = 1;
	}

	return 0;
}

/*
 * exported - boolean info callbacks for ease of programming
 */
int snd_pmac_boolean_stereo_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

int snd_pmac_boolean_mono_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

#ifdef PMAC_SUPPORT_AUTOMUTE
/*
 * auto-mute
 */
static int pmac_auto_mute_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	pmac_t *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = chip->auto_mute;
	return 0;
}

static int pmac_auto_mute_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	pmac_t *chip = snd_kcontrol_chip(kcontrol);
	if (ucontrol->value.integer.value[0] != chip->auto_mute) {
		chip->auto_mute = ucontrol->value.integer.value[0];
		if (chip->update_automute)
			chip->update_automute(chip, 1);
		return 1;
	}
	return 0;
}

static int pmac_hp_detect_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	pmac_t *chip = snd_kcontrol_chip(kcontrol);
	if (chip->detect_headphone)
		ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
	else
		ucontrol->value.integer.value[0] = 0;
	return 0;
}

static snd_kcontrol_new_t auto_mute_controls[] __initdata = {
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	  .name = "Auto Mute Switch",
	  .info = snd_pmac_boolean_mono_info,
	  .get = pmac_auto_mute_get,
	  .put = pmac_auto_mute_put,
	},
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	  .name = "Headphone Detection",
	  .access = SNDRV_CTL_ELEM_ACCESS_READ,
	  .info = snd_pmac_boolean_mono_info,
	  .get = pmac_hp_detect_get,
	},
};

int __init snd_pmac_add_automute(pmac_t *chip)
{
	int err;
	chip->auto_mute = 1;
	err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
	if (err < 0)
		return err;
	chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
	return snd_ctl_add(chip->card, chip->hp_detect_ctl);
}
#endif /* PMAC_SUPPORT_AUTOMUTE */

/*
 * create and detect a pmac chip record
 */
int __init snd_pmac_new(snd_card_t *card, pmac_t **chip_return)
{
	pmac_t *chip;
	struct device_node *np;
	int i, err;
	static snd_device_ops_t ops = {
		.dev_free =	snd_pmac_dev_free,
	};

	snd_runtime_check(chip_return, return -EINVAL);
	*chip_return = NULL;

	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;
	chip->card = card;

	spin_lock_init(&chip->reg_lock);
	chip->irq = chip->tx_irq = chip->rx_irq = -1;

	chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
	chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;

	if ((err = snd_pmac_detect(chip)) < 0)
		goto __error;

	if (snd_pmac_dbdma_alloc(&chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
	    snd_pmac_dbdma_alloc(&chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
	    snd_pmac_dbdma_alloc(&chip->extra_dma, 2) < 0) {
		err = -ENOMEM;
		goto __error;
	}

	np = chip->node;
	if (np->n_addrs < 3 || np->n_intrs < 3) {
		err = -ENODEV;
		goto __error;
	}

	for (i = 0; i < 3; i++) {
		static char *name[3] = { NULL, "- Tx DMA", "- Rx DMA" };
		if (! request_OF_resource(np, i, name[i])) {
			snd_printk(KERN_ERR "pmac: can't request resource %d!\n", i);
			err = -ENODEV;
			goto __error;
		}
		chip->of_requested |= (1 << i);
	}

	chip->awacs = (volatile struct awacs_regs *) ioremap(np->addrs[0].address, 0x1000);
	chip->playback.dma = (volatile struct dbdma_regs *) ioremap(np->addrs[1].address, 0x100);
	chip->capture.dma = (volatile struct dbdma_regs *) ioremap(np->addrs[2].address, 0x100);
	if (chip->model <= PMAC_BURGUNDY) {
		if (request_irq(np->intrs[0].line, snd_pmac_ctrl_intr, 0,
				"PMac", (void*)chip)) {
			snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[0].line);
			err = -EBUSY;
			goto __error;
		}
		chip->irq = np->intrs[0].line;
	}
	if (request_irq(np->intrs[1].line, snd_pmac_tx_intr, 0,
			"PMac Output", (void*)chip)) {
		snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[1].line);
		err = -EBUSY;
		goto __error;
	}
	chip->tx_irq = np->intrs[1].line;
	if (request_irq(np->intrs[2].line, snd_pmac_rx_intr, 0,
			"PMac Input", (void*)chip)) {
		snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[2].line);
		err = -EBUSY;
		goto __error;
	}
	chip->rx_irq = np->intrs[2].line;

	snd_pmac_sound_feature(chip, 1);

	/* reset */
	out_le32(&chip->awacs->control, 0x11);

	/* Powerbooks have odd ways of enabling inputs such as
	   an expansion-bay CD or sound from an internal modem
	   or a PC-card modem. */
	if (chip->is_pbook_3400) {
		/* Enable CD and PC-card sound inputs. */
		/* This is done by reading from address
		 * f301a000, + 0x10 to enable the expansion-bay
		 * CD sound input, + 0x80 to enable the PC-card
		 * sound input.  The 0x100 enables the SCSI bus
		 * terminator power.
		 */
		chip->latch_base = (unsigned char *) ioremap (0xf301a000, 0x1000);
		in_8(chip->latch_base + 0x190);
	} else if (chip->is_pbook_G3) {
		struct device_node* mio;
		for (mio = chip->node->parent; mio; mio = mio->parent) {
			if (strcmp(mio->name, "mac-io") == 0
			    && mio->n_addrs > 0) {
				chip->macio_base = (unsigned char *) ioremap
					(mio->addrs[0].address, 0x40);
				break;
			}
		}
		/* Enable CD sound input. */
		/* The relevant bits for writing to this byte are 0x8f.
		 * I haven't found out what the 0x80 bit does.
		 * For the 0xf bits, writing 3 or 7 enables the CD
		 * input, any other value disables it.  Values
		 * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
		 * 4, 6, 8 - f enable the input from the modem.
		 */
		if (chip->macio_base)
			out_8(chip->macio_base + 0x37, 3);
	}

	/* Reset dbdma channels */
	snd_pmac_dbdma_reset(chip);

#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
	/* add sleep notifier */
	if (! snd_pmac_register_sleep_notifier(chip))
		snd_card_set_pm_callback(chip->card, snd_pmac_suspend, snd_pmac_resume, chip);
#endif

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
		goto __error;

	*chip_return = chip;
	return 0;

 __error:
	snd_pmac_free(chip);
	return err;
}


/*
 * sleep notify for powerbook
 */

#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)

/*
 * Save state when going to sleep, restore it afterwards.
 */

static int snd_pmac_suspend(snd_card_t *card, unsigned int state)
{
	pmac_t *chip = card->pm_private_data;
	unsigned long flags;

	if (chip->suspend)
		chip->suspend(chip);
	snd_pcm_suspend_all(chip->pcm);
	spin_lock_irqsave(&chip->reg_lock, flags);
	snd_pmac_beep_stop(chip);
	spin_unlock_irqrestore(&chip->reg_lock, flags);
	if (chip->irq >= 0)
		disable_irq(chip->irq);
	if (chip->tx_irq >= 0)
		disable_irq(chip->tx_irq);
	if (chip->rx_irq >= 0)
		disable_irq(chip->rx_irq);
	snd_pmac_sound_feature(chip, 0);
	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
	return 0;
}

static int snd_pmac_resume(snd_card_t *card, unsigned int state)
{
	pmac_t *chip = card->pm_private_data;

	snd_pmac_sound_feature(chip, 1);
	if (chip->resume)
		chip->resume(chip);
	/* enable CD sound input */
	if (chip->macio_base && chip->is_pbook_G3) {
		out_8(chip->macio_base + 0x37, 3);
	} else if (chip->is_pbook_3400) {
		in_8(chip->latch_base + 0x190);
	}

	snd_pmac_pcm_set_format(chip);

	if (chip->irq >= 0)
		enable_irq(chip->irq);
	if (chip->tx_irq >= 0)
		enable_irq(chip->tx_irq);
	if (chip->rx_irq >= 0)
		enable_irq(chip->rx_irq);

	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
	return 0;
}

/* the chip is stored statically by snd_pmac_register_sleep_notifier
 * because we can't have any private data for notify callback.
 */
static pmac_t *sleeping_pmac = NULL;

static int snd_pmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
{
	pmac_t *chip;

	chip = sleeping_pmac;
	snd_runtime_check(chip, return 0);

	switch (when) {
	case PBOOK_SLEEP_NOW:
		snd_pmac_suspend(chip->card, 0);
		break;
	case PBOOK_WAKE:
		snd_pmac_resume(chip->card, 0);
		break;
	}
	return PBOOK_SLEEP_OK;
}

static struct pmu_sleep_notifier snd_pmac_sleep_notifier = {
	snd_pmac_sleep_notify, SLEEP_LEVEL_SOUND,
};

static int __init snd_pmac_register_sleep_notifier(pmac_t *chip)
{
	/* should be protected here.. */
	snd_assert(! sleeping_pmac, return -EBUSY);
	sleeping_pmac = chip;
	pmu_register_sleep_notifier(&snd_pmac_sleep_notifier);
	return 0;
}
						    
static int snd_pmac_unregister_sleep_notifier(pmac_t *chip)
{
	/* should be protected here.. */
	snd_assert(sleeping_pmac == chip, return -ENODEV);
	pmu_unregister_sleep_notifier(&snd_pmac_sleep_notifier);
	sleeping_pmac = NULL;
	return 0;
}

#endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */