tumbler.c

linux 内核源代码

			msleep(10);
		check_mute(chip, &mix->hp_mute, 1, mix->auto_mute_notify,
			   chip->master_sw_ctl);
		if (mix->line_mute.addr != 0)
			check_mute(chip, &mix->line_mute, 1, mix->auto_mute_notify,
				   chip->lineout_sw_ctl);
	}
	if (mix->auto_mute_notify)
		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
				       &chip->hp_detect_ctl->id);

#ifdef CONFIG_SND_POWERMAC_AUTO_DRC
	mix->drc_enable = ! (headphone || lineout);
	if (mix->auto_mute_notify)
		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &chip->drc_sw_ctl->id);
	if (chip->model == PMAC_TUMBLER)
		tumbler_set_drc(mix);
	else
		snapper_set_drc(mix);
#endif

	/* reset the master volume so the correct amplification is applied */
	tumbler_set_master_volume(mix);
}

static void tumbler_update_automute(struct snd_pmac *chip, int do_notify)
{
	if (chip->auto_mute) {
		struct pmac_tumbler *mix;
		mix = chip->mixer_data;
		snd_assert(mix, return);
		mix->auto_mute_notify = do_notify;
		schedule_work(&device_change);
	}
}
#endif /* PMAC_SUPPORT_AUTOMUTE */


/* interrupt - headphone plug changed */
static irqreturn_t headphone_intr(int irq, void *devid)
{
	struct snd_pmac *chip = devid;
	if (chip->update_automute && chip->initialized) {
		chip->update_automute(chip, 1);
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

/* look for audio-gpio device */
static struct device_node *find_audio_device(const char *name)
{
	struct device_node *gpiop;
	struct device_node *np;
  
	gpiop = of_find_node_by_name(NULL, "gpio");
	if (! gpiop)
		return NULL;
  
	for (np = of_get_next_child(gpiop, NULL); np;
			np = of_get_next_child(gpiop, np)) {
		const char *property = of_get_property(np, "audio-gpio", NULL);
		if (property && strcmp(property, name) == 0)
			break;
	}  
	of_node_put(gpiop);
	return np;
}

/* look for audio-gpio device */
static struct device_node *find_compatible_audio_device(const char *name)
{
	struct device_node *gpiop;
	struct device_node *np;
  
	gpiop = of_find_node_by_name(NULL, "gpio");
	if (!gpiop)
		return NULL;
  
	for (np = of_get_next_child(gpiop, NULL); np;
			np = of_get_next_child(gpiop, np)) {
		if (of_device_is_compatible(np, name))
			break;
	}  
	of_node_put(gpiop);
	return np;
}

/* find an audio device and get its address */
static long tumbler_find_device(const char *device, const char *platform,
				struct pmac_gpio *gp, int is_compatible)
{
	struct device_node *node;
	const u32 *base;
	u32 addr;
	long ret;

	if (is_compatible)
		node = find_compatible_audio_device(device);
	else
		node = find_audio_device(device);
	if (! node) {
		DBG("(W) cannot find audio device %s !\n", device);
		snd_printdd("cannot find device %s\n", device);
		return -ENODEV;
	}

	base = of_get_property(node, "AAPL,address", NULL);
	if (! base) {
		base = of_get_property(node, "reg", NULL);
		if (!base) {
			DBG("(E) cannot find address for device %s !\n", device);
			snd_printd("cannot find address for device %s\n", device);
			of_node_put(node);
			return -ENODEV;
		}
		addr = *base;
		if (addr < 0x50)
			addr += 0x50;
	} else
		addr = *base;

	gp->addr = addr & 0x0000ffff;
	/* Try to find the active state, default to 0 ! */
	base = of_get_property(node, "audio-gpio-active-state", NULL);
	if (base) {
		gp->active_state = *base;
		gp->active_val = (*base) ? 0x5 : 0x4;
		gp->inactive_val = (*base) ? 0x4 : 0x5;
	} else {
		const u32 *prop = NULL;
		gp->active_state = 0;
		gp->active_val = 0x4;
		gp->inactive_val = 0x5;
		/* Here are some crude hacks to extract the GPIO polarity and
		 * open collector informations out of the do-platform script
		 * as we don't yet have an interpreter for these things
		 */
		if (platform)
			prop = of_get_property(node, platform, NULL);
		if (prop) {
			if (prop[3] == 0x9 && prop[4] == 0x9) {
				gp->active_val = 0xd;
				gp->inactive_val = 0xc;
			}
			if (prop[3] == 0x1 && prop[4] == 0x1) {
				gp->active_val = 0x5;
				gp->inactive_val = 0x4;
			}
		}
	}

	DBG("(I) GPIO device %s found, offset: %x, active state: %d !\n",
	    device, gp->addr, gp->active_state);

	ret = irq_of_parse_and_map(node, 0);
	of_node_put(node);
	return ret;
}

/* reset audio */
static void tumbler_reset_audio(struct snd_pmac *chip)
{
	struct pmac_tumbler *mix = chip->mixer_data;

	if (mix->anded_reset) {
		DBG("(I) codec anded reset !\n");
		write_audio_gpio(&mix->hp_mute, 0);
		write_audio_gpio(&mix->amp_mute, 0);
		msleep(200);
		write_audio_gpio(&mix->hp_mute, 1);
		write_audio_gpio(&mix->amp_mute, 1);
		msleep(100);
		write_audio_gpio(&mix->hp_mute, 0);
		write_audio_gpio(&mix->amp_mute, 0);
		msleep(100);
	} else {
		DBG("(I) codec normal reset !\n");

		write_audio_gpio(&mix->audio_reset, 0);
		msleep(200);
		write_audio_gpio(&mix->audio_reset, 1);
		msleep(100);
		write_audio_gpio(&mix->audio_reset, 0);
		msleep(100);
	}
}

#ifdef CONFIG_PM
/* suspend mixer */
static void tumbler_suspend(struct snd_pmac *chip)
{
	struct pmac_tumbler *mix = chip->mixer_data;

	if (mix->headphone_irq >= 0)
		disable_irq(mix->headphone_irq);
	if (mix->lineout_irq >= 0)
		disable_irq(mix->lineout_irq);
	mix->save_master_switch[0] = mix->master_switch[0];
	mix->save_master_switch[1] = mix->master_switch[1];
	mix->save_master_vol[0] = mix->master_vol[0];
	mix->save_master_vol[1] = mix->master_vol[1];
	mix->master_switch[0] = mix->master_switch[1] = 0;
	tumbler_set_master_volume(mix);
	if (!mix->anded_reset) {
		write_audio_gpio(&mix->amp_mute, 1);
		write_audio_gpio(&mix->hp_mute, 1);
	}
	if (chip->model == PMAC_SNAPPER) {
		mix->acs |= 1;
		i2c_smbus_write_byte_data(mix->i2c.client, TAS_REG_ACS, mix->acs);
	}
	if (mix->anded_reset) {
		write_audio_gpio(&mix->amp_mute, 1);
		write_audio_gpio(&mix->hp_mute, 1);
	} else
		write_audio_gpio(&mix->audio_reset, 1);
}

/* resume mixer */
static void tumbler_resume(struct snd_pmac *chip)
{
	struct pmac_tumbler *mix = chip->mixer_data;

	snd_assert(mix, return);

	mix->acs &= ~1;
	mix->master_switch[0] = mix->save_master_switch[0];
	mix->master_switch[1] = mix->save_master_switch[1];
	mix->master_vol[0] = mix->save_master_vol[0];
	mix->master_vol[1] = mix->save_master_vol[1];
	tumbler_reset_audio(chip);
	if (mix->i2c.client && mix->i2c.init_client) {
		if (mix->i2c.init_client(&mix->i2c) < 0)
			printk(KERN_ERR "tumbler_init_client error\n");
	} else
		printk(KERN_ERR "tumbler: i2c is not initialized\n");
	if (chip->model == PMAC_TUMBLER) {
		tumbler_set_mono_volume(mix, &tumbler_pcm_vol_info);
		tumbler_set_mono_volume(mix, &tumbler_bass_vol_info);
		tumbler_set_mono_volume(mix, &tumbler_treble_vol_info);
		tumbler_set_drc(mix);
	} else {
		snapper_set_mix_vol(mix, VOL_IDX_PCM);
		snapper_set_mix_vol(mix, VOL_IDX_PCM2);
		snapper_set_mix_vol(mix, VOL_IDX_ADC);
		tumbler_set_mono_volume(mix, &snapper_bass_vol_info);
		tumbler_set_mono_volume(mix, &snapper_treble_vol_info);
		snapper_set_drc(mix);
		snapper_set_capture_source(mix);
	}
	tumbler_set_master_volume(mix);
	if (chip->update_automute)
		chip->update_automute(chip, 0);
	if (mix->headphone_irq >= 0) {
		unsigned char val;

		enable_irq(mix->headphone_irq);
		/* activate headphone status interrupts */
		val = do_gpio_read(&mix->hp_detect);
		do_gpio_write(&mix->hp_detect, val | 0x80);
	}
	if (mix->lineout_irq >= 0)
		enable_irq(mix->lineout_irq);
}
#endif

/* initialize tumbler */
static int __init tumbler_init(struct snd_pmac *chip)
{
	int irq;
	struct pmac_tumbler *mix = chip->mixer_data;
	snd_assert(mix, return -EINVAL);

	if (tumbler_find_device("audio-hw-reset",
				"platform-do-hw-reset",
				&mix->audio_reset, 0) < 0)
		tumbler_find_device("hw-reset",
				    "platform-do-hw-reset",
				    &mix->audio_reset, 1);
	if (tumbler_find_device("amp-mute",
				"platform-do-amp-mute",
				&mix->amp_mute, 0) < 0)
		tumbler_find_device("amp-mute",
				    "platform-do-amp-mute",
				    &mix->amp_mute, 1);
	if (tumbler_find_device("headphone-mute",
				"platform-do-headphone-mute",
				&mix->hp_mute, 0) < 0)
		tumbler_find_device("headphone-mute",
				    "platform-do-headphone-mute",
				    &mix->hp_mute, 1);
	if (tumbler_find_device("line-output-mute",
				"platform-do-lineout-mute",
				&mix->line_mute, 0) < 0)
		tumbler_find_device("line-output-mute",
				   "platform-do-lineout-mute",
				    &mix->line_mute, 1);
	irq = tumbler_find_device("headphone-detect",
				  NULL, &mix->hp_detect, 0);
	if (irq <= NO_IRQ)
		irq = tumbler_find_device("headphone-detect",
					  NULL, &mix->hp_detect, 1);
	if (irq <= NO_IRQ)
		irq = tumbler_find_device("keywest-gpio15",
					  NULL, &mix->hp_detect, 1);
	mix->headphone_irq = irq;
 	irq = tumbler_find_device("line-output-detect",
				  NULL, &mix->line_detect, 0);
 	if (irq <= NO_IRQ)
		irq = tumbler_find_device("line-output-detect",
					  NULL, &mix->line_detect, 1);
	mix->lineout_irq = irq;

	tumbler_reset_audio(chip);
  
	return 0;
}

static void tumbler_cleanup(struct snd_pmac *chip)
{
	struct pmac_tumbler *mix = chip->mixer_data;
	if (! mix)
		return;

	if (mix->headphone_irq >= 0)
		free_irq(mix->headphone_irq, chip);
	if (mix->lineout_irq >= 0)
		free_irq(mix->lineout_irq, chip);
	tumbler_gpio_free(&mix->audio_reset);
	tumbler_gpio_free(&mix->amp_mute);
	tumbler_gpio_free(&mix->hp_mute);
	tumbler_gpio_free(&mix->hp_detect);
	snd_pmac_keywest_cleanup(&mix->i2c);
	kfree(mix);
	chip->mixer_data = NULL;
}

/* exported */
int __init snd_pmac_tumbler_init(struct snd_pmac *chip)
{
	int i, err;
	struct pmac_tumbler *mix;
	const u32 *paddr;
	struct device_node *tas_node, *np;
	char *chipname;

#ifdef CONFIG_KMOD
	if (current->fs->root)
		request_module("i2c-powermac");
#endif /* CONFIG_KMOD */	

	mix = kzalloc(sizeof(*mix), GFP_KERNEL);
	if (! mix)
		return -ENOMEM;
	mix->headphone_irq = -1;

	chip->mixer_data = mix;
	chip->mixer_free = tumbler_cleanup;
	mix->anded_reset = 0;
	mix->reset_on_sleep = 1;

	for (np = chip->node->child; np; np = np->sibling) {
		if (!strcmp(np->name, "sound")) {
			if (of_get_property(np, "has-anded-reset", NULL))
				mix->anded_reset = 1;
			if (of_get_property(np, "layout-id", NULL))
				mix->reset_on_sleep = 0;
			break;
		}
	}
	if ((err = tumbler_init(chip)) < 0)
		return err;

	/* set up TAS */
	tas_node = of_find_node_by_name(NULL, "deq");
	if (tas_node == NULL)
		tas_node = of_find_node_by_name(NULL, "codec");
	if (tas_node == NULL)
		return -ENODEV;

	paddr = of_get_property(tas_node, "i2c-address", NULL);
	if (paddr == NULL)
		paddr = of_get_property(tas_node, "reg", NULL);
	if (paddr)
		mix->i2c.addr = (*paddr) >> 1;
	else
		mix->i2c.addr = TAS_I2C_ADDR;
	of_node_put(tas_node);

	DBG("(I) TAS i2c address is: %x\n", mix->i2c.addr);

	if (chip->model == PMAC_TUMBLER) {
		mix->i2c.init_client = tumbler_init_client;
		mix->i2c.name = "TAS3001c";
		chipname = "Tumbler";
	} else {
		mix->i2c.init_client = snapper_init_client;
		mix->i2c.name = "TAS3004";
		chipname = "Snapper";
	}

	if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
		return err;

	/*
	 * build mixers
	 */
	sprintf(chip->card->mixername, "PowerMac %s", chipname);

	if (chip->model == PMAC_TUMBLER) {
		for (i = 0; i < ARRAY_SIZE(tumbler_mixers); i++) {
			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&tumbler_mixers[i], chip))) < 0)
				return err;
		}
	} else {
		for (i = 0; i < ARRAY_SIZE(snapper_mixers); i++) {
			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snapper_mixers[i], chip))) < 0)
				return err;
		}
	}
	chip->master_sw_ctl = snd_ctl_new1(&tumbler_hp_sw, chip);
	if ((err = snd_ctl_add(chip->card, chip->master_sw_ctl)) < 0)
		return err;
	chip->speaker_sw_ctl = snd_ctl_new1(&tumbler_speaker_sw, chip);
	if ((err = snd_ctl_add(chip->card, chip->speaker_sw_ctl)) < 0)
		return err;
	if (mix->line_mute.addr != 0) {
		chip->lineout_sw_ctl = snd_ctl_new1(&tumbler_lineout_sw, chip);
		if ((err = snd_ctl_add(chip->card, chip->lineout_sw_ctl)) < 0)
			return err;
	}
	chip->drc_sw_ctl = snd_ctl_new1(&tumbler_drc_sw, chip);
	if ((err = snd_ctl_add(chip->card, chip->drc_sw_ctl)) < 0)
		return err;

	/* set initial DRC range to 60% */
	if (chip->model == PMAC_TUMBLER)
		mix->drc_range = (TAS3001_DRC_MAX * 6) / 10;
	else
		mix->drc_range = (TAS3004_DRC_MAX * 6) / 10;
	mix->drc_enable = 1; /* will be changed later if AUTO_DRC is set */
	if (chip->model == PMAC_TUMBLER)
		tumbler_set_drc(mix);
	else
		snapper_set_drc(mix);

#ifdef CONFIG_PM
	chip->suspend = tumbler_suspend;
	chip->resume = tumbler_resume;
#endif

	INIT_WORK(&device_change, device_change_handler);
	device_change_chip = chip;

#ifdef PMAC_SUPPORT_AUTOMUTE
	if ((mix->headphone_irq >=0 || mix->lineout_irq >= 0)
	    && (err = snd_pmac_add_automute(chip)) < 0)
		return err;
	chip->detect_headphone = tumbler_detect_headphone;
	chip->update_automute = tumbler_update_automute;
	tumbler_update_automute(chip, 0); /* update the status only */

	/* activate headphone status interrupts */
  	if (mix->headphone_irq >= 0) {
		unsigned char val;
		if ((err = request_irq(mix->headphone_irq, headphone_intr, 0,
				       "Sound Headphone Detection", chip)) < 0)
			return 0;
		/* activate headphone status interrupts */
		val = do_gpio_read(&mix->hp_detect);
		do_gpio_write(&mix->hp_detect, val | 0x80);
	}
  	if (mix->lineout_irq >= 0) {
		unsigned char val;
		if ((err = request_irq(mix->lineout_irq, headphone_intr, 0,
				       "Sound Lineout Detection", chip)) < 0)
			return 0;
		/* activate headphone status interrupts */
		val = do_gpio_read(&mix->line_detect);
		do_gpio_write(&mix->line_detect, val | 0x80);
	}
#endif

	return 0;
}