[ALSA] Removing obsolete AC97_SHARED_TYPES

This patch cleans last ac97 audio/modem codec interception in
initialization procedures (ac97_mixer_new()) and removes obsolete
SHARED_TYPE 'locking' which prevents from AMC codecs to function
correctly.

Signed-off-by: Sasha Khapyorsky <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>

include/sound/ac97_codec.h

···
 #define AC97_RATES_MIC_ADC	4
 #define AC97_RATES_SPDIF	5
 
-/* shared controllers */
-enum {
-	AC97_SHARED_TYPE_NONE,
-	AC97_SHARED_TYPE_ICH,
-	AC97_SHARED_TYPE_ATIIXP,
-	AC97_SHARED_TYPE_VIA,
-	AC97_SHARED_TYPES
-};
-
 /*
  *
  */
···
 	unsigned short used_slots[2][4]; /* actually used PCM slots */
 	unsigned short pcms_count; /* count of PCMs */
 	struct ac97_pcm *pcms;
-	unsigned int shared_type;	/* type of shared controller betwen audio and modem */
 	ac97_t *codec[4];
 	snd_info_entry_t *proc;
 };

sound/pci/ac97/ac97_codec.c

···
   /*  31 */ "Reserved 31"
 };
 
-/*
- * Shared AC97 controllers (ICH, ATIIXP...)
- */
-static DECLARE_MUTEX(shared_codec_mutex);
-static ac97_t *shared_codec[AC97_SHARED_TYPES][4];
-
 
 /*
  *  I/O routines
···
 {
 	if (ac97) {
 		snd_ac97_proc_done(ac97);
-		if (ac97->bus) {
+		if (ac97->bus)
 			ac97->bus->codec[ac97->num] = NULL;
-			if (ac97->bus->shared_type) {
-				down(&shared_codec_mutex);
-				shared_codec[ac97->bus->shared_type-1][ac97->num] = NULL;
-				up(&shared_codec_mutex);
-			}
-		}
 		if (ac97->private_free)
 			ac97->private_free(ac97);
 		kfree(ac97);
···
 	snd_assert(bus != NULL && template != NULL, return -EINVAL);
 	snd_assert(template->num < 4 && bus->codec[template->num] == NULL, return -EINVAL);
 
-	snd_assert(bus->shared_type <= AC97_SHARED_TYPES, return -EINVAL);
-	if (bus->shared_type) {
-		/* already shared? */
-		down(&shared_codec_mutex);
-		ac97 = shared_codec[bus->shared_type-1][template->num];
-		if (ac97) {
-			if ((ac97_is_audio(ac97) && (template->scaps & AC97_SCAP_SKIP_AUDIO)) ||
-			    (ac97_is_modem(ac97) && (template->scaps & AC97_SCAP_SKIP_MODEM))) {
-				up(&shared_codec_mutex);
-				return -EACCES; /* skip this */
-			}
-		}
-		up(&shared_codec_mutex);
-	}
-
 	card = bus->card;
 	ac97 = kzalloc(sizeof(*ac97), GFP_KERNEL);
 	if (ac97 == NULL)
···
 		}
 	}
 	/* make sure the proper powerdown bits are cleared */
-	if (ac97->scaps) {
+	if (ac97->scaps && ac97_is_audio(ac97)) {
 		reg = snd_ac97_read(ac97, AC97_EXTENDED_STATUS);
 		if (ac97->scaps & AC97_SCAP_SURROUND_DAC) 
 			reg &= ~AC97_EA_PRJ;
···
 		return err;
 	}
 	*rac97 = ac97;
-
-	if (bus->shared_type) {
-		down(&shared_codec_mutex);
-		shared_codec[bus->shared_type-1][ac97->num] = ac97;
-		up(&shared_codec_mutex);
-	}
-
 	return 0;
 }
 

sound/pci/atiixp.c

···
 	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
 		return err;
 	pbus->clock = clock;
-	pbus->shared_type = AC97_SHARED_TYPE_ATIIXP;	/* shared with modem driver */
 	chip->ac97_bus = pbus;
 
 	codec_count = 0;

sound/pci/atiixp_modem.c

···
 	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
 		return err;
 	pbus->clock = clock;
-	pbus->shared_type = AC97_SHARED_TYPE_ATIIXP;	/* shared with audio driver */
 	chip->ac97_bus = pbus;
 
 	codec_count = 0;

sound/pci/intel8x0.c

···
 	if ((err = snd_ac97_bus(chip->card, 0, ops, chip, &pbus)) < 0)
 		goto __err;
 	pbus->private_free = snd_intel8x0_mixer_free_ac97_bus;
-	pbus->shared_type = AC97_SHARED_TYPE_ICH;	/* shared with modem driver */
 	if (ac97_clock >= 8000 && ac97_clock <= 48000)
 		pbus->clock = ac97_clock;
 	/* FIXME: my test board doesn't work well with VRA... */

sound/pci/intel8x0m.c

···
 	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
 		goto __err;
 	pbus->private_free = snd_intel8x0_mixer_free_ac97_bus;
-	pbus->shared_type = AC97_SHARED_TYPE_ICH;	/* shared with audio driver */
 	if (ac97_clock >= 8000 && ac97_clock <= 48000)
 		pbus->clock = ac97_clock;
 	chip->ac97_bus = pbus;

sound/pci/via82xx.c

···
 		return err;
 	chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 	chip->ac97_bus->clock = chip->ac97_clock;
-	chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
 
 	memset(&ac97, 0, sizeof(ac97));
 	ac97.private_data = chip;
 	ac97.private_free = snd_via82xx_mixer_free_ac97;
 	ac97.pci = chip->pci;
+	ac97.scaps = AC97_SCAP_SKIP_MODEM;
 	if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 		return err;
 

sound/pci/via82xx_modem.c

···
 		return err;
 	chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 	chip->ac97_bus->clock = chip->ac97_clock;
-	chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
 
 	memset(&ac97, 0, sizeof(ac97));
 	ac97.private_data = chip;