pmac.c

linux 内核源代码

	 */
	if (!chip->node)
		chip->node = of_find_node_by_name(NULL, "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 = of_find_node_by_name(NULL, "i2s-a");
		if (chip->node && chip->node->parent &&
		    chip->node->parent->parent) {
			if (of_device_is_compatible(chip->node->parent->parent,
						 "K2-Keylargo"))
				chip->is_k2 = 1;
		}
	}
	if (! chip->node)
		return -ENODEV;

	if (!sound) {
		sound = of_find_node_by_name(NULL, "sound");
		while (sound && sound->parent != chip->node)
			sound = of_find_node_by_name(sound, "sound");
	}
	if (! sound) {
		of_node_put(chip->node);
		chip->node = NULL;
		return -ENODEV;
	}
	prop = of_get_property(sound, "sub-frame", NULL);
	if (prop && *prop < 16)
		chip->subframe = *prop;
	prop = of_get_property(sound, "layout-id", NULL);
	if (prop) {
		/* partly deprecate snd-powermac, for those machines
		 * that have a layout-id property for now */
		printk(KERN_INFO "snd-powermac no longer handles any "
				 "machines with a layout-id property "
				 "in the device-tree, use snd-aoa.\n");
		of_node_put(sound);
		of_node_put(chip->node);
		chip->node = NULL;
		return -ENODEV;
	}
	/* This should be verified on older screamers */
	if (of_device_is_compatible(sound, "screamer")) {
		chip->model = PMAC_SCREAMER;
		// chip->can_byte_swap = 0; /* FIXME: check this */
	}
	if (of_device_is_compatible(sound, "burgundy")) {
		chip->model = PMAC_BURGUNDY;
		chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
	}
	if (of_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 (of_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 (of_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 */
	}
	prop = of_get_property(sound, "device-id", NULL);
	if (prop)
		chip->device_id = *prop;
	dn = of_find_node_by_name(NULL, "perch");
	chip->has_iic = (dn != NULL);
	of_node_put(dn);

	/* We need the PCI device for DMA allocations, let's use a crude method
	 * for now ...
	 */
	macio = macio_find(chip->node, macio_unknown);
	if (macio == NULL)
		printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
	else {
		struct pci_dev *pdev = NULL;

		for_each_pci_dev(pdev) {
			struct device_node *np = pci_device_to_OF_node(pdev);
			if (np && np == macio->of_node) {
				chip->pdev = pdev;
				break;
			}
		}
	}
	if (chip->pdev == NULL)
		printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
		       " device !\n");

	detect_byte_swap(chip);

	/* look for a property saying what sample rates
	   are available */
	prop = of_get_property(sound, "sample-rates", &l);
	if (! prop)
		prop = of_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;
	}

	of_node_put(sound);
	return 0;
}

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

static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pmac *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(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_pmac *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 struct snd_kcontrol_new 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(struct snd_pmac *chip)
{
	int err;
	chip->auto_mute = 1;
	err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
	if (err < 0) {
		printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
		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(struct snd_card *card, struct snd_pmac **chip_return)
{
	struct snd_pmac *chip;
	struct device_node *np;
	int i, err;
	unsigned int irq;
	unsigned long ctrl_addr, txdma_addr, rxdma_addr;
	static struct snd_device_ops ops = {
		.dev_free =	snd_pmac_dev_free,
	};

	*chip_return = NULL;

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

	np = chip->node;
	chip->requested = 0;
	if (chip->is_k2) {
		static char *rnames[] = {
			"Sound Control", "Sound DMA" };
		for (i = 0; i < 2; i ++) {
			if (of_address_to_resource(np->parent, i,
						   &chip->rsrc[i])) {
				printk(KERN_ERR "snd: can't translate rsrc "
				       " %d (%s)\n", i, rnames[i]);
				err = -ENODEV;
				goto __error;
			}
			if (request_mem_region(chip->rsrc[i].start,
					       chip->rsrc[i].end -
					       chip->rsrc[i].start + 1,
					       rnames[i]) == NULL) {
				printk(KERN_ERR "snd: can't request rsrc "
				       " %d (%s: 0x%016llx:%016llx)\n",
				       i, rnames[i],
				       (unsigned long long)chip->rsrc[i].start,
				       (unsigned long long)chip->rsrc[i].end);
				err = -ENODEV;
				goto __error;
			}
			chip->requested |= (1 << i);
		}
		ctrl_addr = chip->rsrc[0].start;
		txdma_addr = chip->rsrc[1].start;
		rxdma_addr = txdma_addr + 0x100;
	} else {
		static char *rnames[] = {
			"Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
		for (i = 0; i < 3; i ++) {
			if (of_address_to_resource(np, i,
						   &chip->rsrc[i])) {
				printk(KERN_ERR "snd: can't translate rsrc "
				       " %d (%s)\n", i, rnames[i]);
				err = -ENODEV;
				goto __error;
			}
			if (request_mem_region(chip->rsrc[i].start,
					       chip->rsrc[i].end -
					       chip->rsrc[i].start + 1,
					       rnames[i]) == NULL) {
				printk(KERN_ERR "snd: can't request rsrc "
				       " %d (%s: 0x%016llx:%016llx)\n",
				       i, rnames[i],
				       (unsigned long long)chip->rsrc[i].start,
				       (unsigned long long)chip->rsrc[i].end);
				err = -ENODEV;
				goto __error;
			}
			chip->requested |= (1 << i);
		}
		ctrl_addr = chip->rsrc[0].start;
		txdma_addr = chip->rsrc[1].start;
		rxdma_addr = chip->rsrc[2].start;
	}

	chip->awacs = ioremap(ctrl_addr, 0x1000);
	chip->playback.dma = ioremap(txdma_addr, 0x100);
	chip->capture.dma = ioremap(rxdma_addr, 0x100);
	if (chip->model <= PMAC_BURGUNDY) {
		irq = irq_of_parse_and_map(np, 0);
		if (request_irq(irq, snd_pmac_ctrl_intr, 0,
				"PMac", (void*)chip)) {
			snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
				   irq);
			err = -EBUSY;
			goto __error;
		}
		chip->irq = irq;
	}
	irq = irq_of_parse_and_map(np, 1);
	if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
		snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
		err = -EBUSY;
		goto __error;
	}
	chip->tx_irq = irq;
	irq = irq_of_parse_and_map(np, 2);
	if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
		snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
		err = -EBUSY;
		goto __error;
	}
	chip->rx_irq = irq;

	snd_pmac_sound_feature(chip, 1);

	/* reset */
	if (chip->model == PMAC_AWACS)
		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 = 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) {
				struct resource r;
				if (of_address_to_resource(mio, 0, &r) == 0)
					chip->macio_base =
						ioremap(r.start, 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 ((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
 */

#ifdef CONFIG_PM

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

void snd_pmac_suspend(struct snd_pmac *chip)
{
	unsigned long flags;

	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
	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);
}

void snd_pmac_resume(struct snd_pmac *chip)
{
	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(chip->card, SNDRV_CTL_POWER_D0);
}

#endif /* CONFIG_PM */