Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 906 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
new file mode 100644
index 0000000..69f7b6c
--- /dev/null
+++ b/sound/pci/hda/hda_generic.c
@@ -0,0 +1,906 @@
+/*
+ * Universal Interface for Intel High Definition Audio Codec
+ *
+ * Generic widget tree parser
+ *
+ * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
+ *
+ *  This driver is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This driver is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <sound/core.h>
+#include "hda_codec.h"
+#include "hda_local.h"
+
+/* widget node for parsing */
+struct hda_gnode {
+	hda_nid_t nid;		/* NID of this widget */
+	unsigned short nconns;	/* number of input connections */
+	hda_nid_t conn_list[HDA_MAX_CONNECTIONS]; /* input connections */
+	unsigned int wid_caps;	/* widget capabilities */
+	unsigned char type;	/* widget type */
+	unsigned char pin_ctl;	/* pin controls */
+	unsigned char checked;	/* the flag indicates that the node is already parsed */
+	unsigned int pin_caps;	/* pin widget capabilities */
+	unsigned int def_cfg;	/* default configuration */
+	unsigned int amp_out_caps;	/* AMP out capabilities */
+	unsigned int amp_in_caps;	/* AMP in capabilities */
+	struct list_head list;
+};
+
+/* pathc-specific record */
+struct hda_gspec {
+	struct hda_gnode *dac_node;	/* DAC node */
+	struct hda_gnode *out_pin_node;	/* Output pin (Line-Out) node */
+	struct hda_gnode *pcm_vol_node;	/* Node for PCM volume */
+	unsigned int pcm_vol_index;	/* connection of PCM volume */
+
+	struct hda_gnode *adc_node;	/* ADC node */
+	struct hda_gnode *cap_vol_node;	/* Node for capture volume */
+	unsigned int cur_cap_src;	/* current capture source */
+	struct hda_input_mux input_mux;
+	char cap_labels[HDA_MAX_NUM_INPUTS][16];
+
+	unsigned int def_amp_in_caps;
+	unsigned int def_amp_out_caps;
+
+	struct hda_pcm pcm_rec;		/* PCM information */
+
+	struct list_head nid_list;	/* list of widgets */
+};
+
+/*
+ * retrieve the default device type from the default config value
+ */
+#define get_defcfg_type(node) (((node)->def_cfg & AC_DEFCFG_DEVICE) >> AC_DEFCFG_DEVICE_SHIFT)
+#define get_defcfg_location(node) (((node)->def_cfg & AC_DEFCFG_LOCATION) >> AC_DEFCFG_LOCATION_SHIFT)
+
+/*
+ * destructor
+ */
+static void snd_hda_generic_free(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct list_head *p, *n;
+
+	if (! spec)
+		return;
+	/* free all widgets */
+	list_for_each_safe(p, n, &spec->nid_list) {
+		struct hda_gnode *node = list_entry(p, struct hda_gnode, list);
+		kfree(node);
+	}
+	kfree(spec);
+}
+
+
+/*
+ * add a new widget node and read its attributes
+ */
+static int add_new_node(struct hda_codec *codec, struct hda_gspec *spec, hda_nid_t nid)
+{
+	struct hda_gnode *node;
+	int nconns;
+
+	node = kcalloc(1, sizeof(*node), GFP_KERNEL);
+	if (node == NULL)
+		return -ENOMEM;
+	node->nid = nid;
+	nconns = snd_hda_get_connections(codec, nid, node->conn_list, HDA_MAX_CONNECTIONS);
+	if (nconns < 0) {
+		kfree(node);
+		return nconns;
+	}
+	node->nconns = nconns;
+	node->wid_caps = snd_hda_param_read(codec, nid, AC_PAR_AUDIO_WIDGET_CAP);
+	node->type = (node->wid_caps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
+
+	if (node->type == AC_WID_PIN) {
+		node->pin_caps = snd_hda_param_read(codec, node->nid, AC_PAR_PIN_CAP);
+		node->pin_ctl = snd_hda_codec_read(codec, node->nid, 0, AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
+		node->def_cfg = snd_hda_codec_read(codec, node->nid, 0, AC_VERB_GET_CONFIG_DEFAULT, 0);
+	}
+
+	if (node->wid_caps & AC_WCAP_OUT_AMP) {
+		if (node->wid_caps & AC_WCAP_AMP_OVRD)
+			node->amp_out_caps = snd_hda_param_read(codec, node->nid, AC_PAR_AMP_OUT_CAP);
+		if (! node->amp_out_caps)
+			node->amp_out_caps = spec->def_amp_out_caps;
+	}
+	if (node->wid_caps & AC_WCAP_IN_AMP) {
+		if (node->wid_caps & AC_WCAP_AMP_OVRD)
+			node->amp_in_caps = snd_hda_param_read(codec, node->nid, AC_PAR_AMP_IN_CAP);
+		if (! node->amp_in_caps)
+			node->amp_in_caps = spec->def_amp_in_caps;
+	}
+	list_add_tail(&node->list, &spec->nid_list);
+	return 0;
+}
+
+/*
+ * build the AFG subtree
+ */
+static int build_afg_tree(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	int i, nodes, err;
+	hda_nid_t nid;
+
+	snd_assert(spec, return -EINVAL);
+
+	spec->def_amp_out_caps = snd_hda_param_read(codec, codec->afg, AC_PAR_AMP_OUT_CAP);
+	spec->def_amp_in_caps = snd_hda_param_read(codec, codec->afg, AC_PAR_AMP_IN_CAP);
+
+	nodes = snd_hda_get_sub_nodes(codec, codec->afg, &nid);
+	if (! nid || nodes < 0) {
+		printk(KERN_ERR "Invalid AFG subtree\n");
+		return -EINVAL;
+	}
+
+	/* parse all nodes belonging to the AFG */
+	for (i = 0; i < nodes; i++, nid++) {
+		if ((err = add_new_node(codec, spec, nid)) < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+
+/*
+ * look for the node record for the given NID
+ */
+/* FIXME: should avoid the braindead linear search */
+static struct hda_gnode *hda_get_node(struct hda_gspec *spec, hda_nid_t nid)
+{
+	struct list_head *p;
+	struct hda_gnode *node;
+
+	list_for_each(p, &spec->nid_list) {
+		node = list_entry(p, struct hda_gnode, list);
+		if (node->nid == nid)
+			return node;
+	}
+	return NULL;
+}
+
+/*
+ * unmute (and set max vol) the output amplifier
+ */
+static int unmute_output(struct hda_codec *codec, struct hda_gnode *node)
+{
+	unsigned int val, ofs;
+	snd_printdd("UNMUTE OUT: NID=0x%x\n", node->nid);
+	val = (node->amp_out_caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
+	ofs = (node->amp_out_caps & AC_AMPCAP_OFFSET) >> AC_AMPCAP_OFFSET_SHIFT;
+	if (val >= ofs)
+		val -= ofs;
+	val |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT;
+	val |= AC_AMP_SET_OUTPUT;
+	return snd_hda_codec_write(codec, node->nid, 0, AC_VERB_SET_AMP_GAIN_MUTE, val);
+}
+
+/*
+ * unmute (and set max vol) the input amplifier
+ */
+static int unmute_input(struct hda_codec *codec, struct hda_gnode *node, unsigned int index)
+{
+	unsigned int val, ofs;
+	snd_printdd("UNMUTE IN: NID=0x%x IDX=0x%x\n", node->nid, index);
+	val = (node->amp_in_caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
+	ofs = (node->amp_in_caps & AC_AMPCAP_OFFSET) >> AC_AMPCAP_OFFSET_SHIFT;
+	if (val >= ofs)
+		val -= ofs;
+	val |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT;
+	val |= AC_AMP_SET_INPUT;
+	// awk added - fixed to allow unmuting of indexed amps
+	val |= index << AC_AMP_SET_INDEX_SHIFT;
+	return snd_hda_codec_write(codec, node->nid, 0, AC_VERB_SET_AMP_GAIN_MUTE, val);
+}
+
+/*
+ * select the input connection of the given node.
+ */
+static int select_input_connection(struct hda_codec *codec, struct hda_gnode *node,
+				   unsigned int index)
+{
+	snd_printdd("CONNECT: NID=0x%x IDX=0x%x\n", node->nid, index);
+	return snd_hda_codec_write(codec, node->nid, 0, AC_VERB_SET_CONNECT_SEL, index);
+}
+
+/*
+ * clear checked flag of each node in the node list
+ */
+static void clear_check_flags(struct hda_gspec *spec)
+{
+	struct list_head *p;
+	struct hda_gnode *node;
+
+	list_for_each(p, &spec->nid_list) {
+		node = list_entry(p, struct hda_gnode, list);
+		node->checked = 0;
+	}
+}
+
+/*
+ * parse the output path recursively until reach to an audio output widget
+ *
+ * returns 0 if not found, 1 if found, or a negative error code.
+ */
+static int parse_output_path(struct hda_codec *codec, struct hda_gspec *spec,
+			     struct hda_gnode *node)
+{
+	int i, err;
+	struct hda_gnode *child;
+
+	if (node->checked)
+		return 0;
+
+	node->checked = 1;
+	if (node->type == AC_WID_AUD_OUT) {
+		if (node->wid_caps & AC_WCAP_DIGITAL) {
+			snd_printdd("Skip Digital OUT node %x\n", node->nid);
+			return 0;
+		}
+		snd_printdd("AUD_OUT found %x\n", node->nid);
+		if (spec->dac_node) {
+			/* already DAC node is assigned, just unmute & connect */
+			return node == spec->dac_node;
+		}
+		spec->dac_node = node;
+		if (node->wid_caps & AC_WCAP_OUT_AMP) {
+			spec->pcm_vol_node = node;
+			spec->pcm_vol_index = 0;
+		}
+		return 1; /* found */
+	}
+
+	for (i = 0; i < node->nconns; i++) {
+		child = hda_get_node(spec, node->conn_list[i]);
+		if (! child)
+			continue;
+		err = parse_output_path(codec, spec, child);
+		if (err < 0)
+			return err;
+		else if (err > 0) {
+			/* found one,
+			 * select the path, unmute both input and output
+			 */
+			if (node->nconns > 1)
+				select_input_connection(codec, node, i);
+			unmute_input(codec, node, i);
+			unmute_output(codec, node);
+			if (! spec->pcm_vol_node) {
+				if (node->wid_caps & AC_WCAP_IN_AMP) {
+					spec->pcm_vol_node = node;
+					spec->pcm_vol_index = i;
+				} else if (node->wid_caps & AC_WCAP_OUT_AMP) {
+					spec->pcm_vol_node = node;
+					spec->pcm_vol_index = 0;
+				}
+			}
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Look for the output PIN widget with the given jack type
+ * and parse the output path to that PIN.
+ *
+ * Returns the PIN node when the path to DAC is established.
+ */
+static struct hda_gnode *parse_output_jack(struct hda_codec *codec,
+					   struct hda_gspec *spec,
+					   int jack_type)
+{
+	struct list_head *p;
+	struct hda_gnode *node;
+	int err;
+
+	list_for_each(p, &spec->nid_list) {
+		node = list_entry(p, struct hda_gnode, list);
+		if (node->type != AC_WID_PIN)
+			continue;
+		/* output capable? */
+		if (! (node->pin_caps & AC_PINCAP_OUT))
+			continue;
+		if (jack_type >= 0) {
+			if (jack_type != get_defcfg_type(node))
+				continue;
+			if (node->wid_caps & AC_WCAP_DIGITAL)
+				continue; /* skip SPDIF */
+		} else {
+			/* output as default? */
+			if (! (node->pin_ctl & AC_PINCTL_OUT_EN))
+				continue;
+		}
+		clear_check_flags(spec);
+		err = parse_output_path(codec, spec, node);
+		if (err < 0)
+			return NULL;
+		else if (err > 0) {
+			/* unmute the PIN output */
+			unmute_output(codec, node);
+			/* set PIN-Out enable */
+			snd_hda_codec_write(codec, node->nid, 0,
+					    AC_VERB_SET_PIN_WIDGET_CONTROL,
+					    AC_PINCTL_OUT_EN | AC_PINCTL_HP_EN);
+			return node;
+		}
+	}
+	return NULL;
+}
+
+
+/*
+ * parse outputs
+ */
+static int parse_output(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct hda_gnode *node;
+
+	/*
+	 * Look for the output PIN widget
+	 */
+	/* first, look for the line-out pin */
+	node = parse_output_jack(codec, spec, AC_JACK_LINE_OUT);
+	if (node) /* found, remember the PIN node */
+		spec->out_pin_node = node;
+	/* look for the HP-out pin */
+	node = parse_output_jack(codec, spec, AC_JACK_HP_OUT);
+	if (node) {
+		if (! spec->out_pin_node)
+			spec->out_pin_node = node;
+	}
+
+	if (! spec->out_pin_node) {
+		/* no line-out or HP pins found,
+		 * then choose for the first output pin
+		 */
+		spec->out_pin_node = parse_output_jack(codec, spec, -1);
+		if (! spec->out_pin_node)
+			snd_printd("hda_generic: no proper output path found\n");
+	}
+
+	return 0;
+}
+
+/*
+ * input MUX
+ */
+
+/* control callbacks */
+static int capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct hda_gspec *spec = codec->spec;
+	return snd_hda_input_mux_info(&spec->input_mux, uinfo);
+}
+
+static int capture_source_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct hda_gspec *spec = codec->spec;
+
+	ucontrol->value.enumerated.item[0] = spec->cur_cap_src;
+	return 0;
+}
+
+static int capture_source_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct hda_gspec *spec = codec->spec;
+	return snd_hda_input_mux_put(codec, &spec->input_mux, ucontrol,
+				     spec->adc_node->nid, &spec->cur_cap_src);
+}
+
+/*
+ * return the string name of the given input PIN widget
+ */
+static const char *get_input_type(struct hda_gnode *node, unsigned int *pinctl)
+{
+	unsigned int location = get_defcfg_location(node);
+	switch (get_defcfg_type(node)) {
+	case AC_JACK_LINE_IN:
+		if ((location & 0x0f) == AC_JACK_LOC_FRONT)
+			return "Front Line";
+		return "Line";
+	case AC_JACK_CD:
+		if (pinctl)
+			*pinctl |= AC_PIN_VREF_GRD;
+		return "CD";
+	case AC_JACK_AUX:
+		if ((location & 0x0f) == AC_JACK_LOC_FRONT)
+			return "Front Aux";
+		return "Aux";
+	case AC_JACK_MIC_IN:
+		if ((location & 0x0f) == AC_JACK_LOC_FRONT)
+			return "Front Mic";
+		return "Mic";
+	case AC_JACK_SPDIF_IN:
+		return "SPDIF";
+	case AC_JACK_DIG_OTHER_IN:
+		return "Digital";
+	}
+	return NULL;
+}
+
+/*
+ * parse the nodes recursively until reach to the input PIN
+ *
+ * returns 0 if not found, 1 if found, or a negative error code.
+ */
+static int parse_adc_sub_nodes(struct hda_codec *codec, struct hda_gspec *spec,
+			       struct hda_gnode *node)
+{
+	int i, err;
+	unsigned int pinctl;
+	char *label;
+	const char *type;
+
+	if (node->checked)
+		return 0;
+
+	node->checked = 1;
+	if (node->type != AC_WID_PIN) {
+		for (i = 0; i < node->nconns; i++) {
+			struct hda_gnode *child;
+			child = hda_get_node(spec, node->conn_list[i]);
+			if (! child)
+				continue;
+			err = parse_adc_sub_nodes(codec, spec, child);
+			if (err < 0)
+				return err;
+			if (err > 0) {
+				/* found one,
+				 * select the path, unmute both input and output
+				 */
+				if (node->nconns > 1)
+					select_input_connection(codec, node, i);
+				unmute_input(codec, node, i);
+				unmute_output(codec, node);
+				return err;
+			}
+		}
+		return 0;
+	}
+
+	/* input capable? */
+	if (! (node->pin_caps & AC_PINCAP_IN))
+		return 0;
+
+	if (node->wid_caps & AC_WCAP_DIGITAL)
+		return 0; /* skip SPDIF */
+
+	if (spec->input_mux.num_items >= HDA_MAX_NUM_INPUTS) {
+		snd_printk(KERN_ERR "hda_generic: Too many items for capture\n");
+		return -EINVAL;
+	}
+
+	pinctl = AC_PINCTL_IN_EN;
+	/* create a proper capture source label */
+	type = get_input_type(node, &pinctl);
+	if (! type) {
+		/* input as default? */
+		if (! (node->pin_ctl & AC_PINCTL_IN_EN))
+			return 0;
+		type = "Input";
+	}
+	label = spec->cap_labels[spec->input_mux.num_items];
+	strcpy(label, type);
+	spec->input_mux.items[spec->input_mux.num_items].label = label;
+
+	/* unmute the PIN external input */
+	unmute_input(codec, node, 0); /* index = 0? */
+	/* set PIN-In enable */
+	snd_hda_codec_write(codec, node->nid, 0, AC_VERB_SET_PIN_WIDGET_CONTROL, pinctl);
+
+	return 1; /* found */
+}
+
+/*
+ * parse input
+ */
+static int parse_input_path(struct hda_codec *codec, struct hda_gnode *adc_node)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct hda_gnode *node;
+	int i, err;
+
+	snd_printdd("AUD_IN = %x\n", adc_node->nid);
+	clear_check_flags(spec);
+
+	// awk added - fixed no recording due to muted widget
+	unmute_input(codec, adc_node, 0);
+	
+	/*
+	 * check each connection of the ADC
+	 * if it reaches to a proper input PIN, add the path as the
+	 * input path.
+	 */
+	for (i = 0; i < adc_node->nconns; i++) {
+		node = hda_get_node(spec, adc_node->conn_list[i]);
+		if (! node)
+			continue;
+		err = parse_adc_sub_nodes(codec, spec, node);
+		if (err < 0)
+			return err;
+		else if (err > 0) {
+			struct hda_input_mux_item *csrc = &spec->input_mux.items[spec->input_mux.num_items];
+			char *buf = spec->cap_labels[spec->input_mux.num_items];
+			int ocap;
+			for (ocap = 0; ocap < spec->input_mux.num_items; ocap++) {
+				if (! strcmp(buf, spec->cap_labels[ocap])) {
+					/* same label already exists,
+					 * put the index number to be unique
+					 */
+					sprintf(buf, "%s %d", spec->cap_labels[ocap],
+						spec->input_mux.num_items);
+				}
+			}
+			csrc->index = i;
+			spec->input_mux.num_items++;
+		}
+	}
+
+	if (! spec->input_mux.num_items)
+		return 0; /* no input path found... */
+
+	snd_printdd("[Capture Source] NID=0x%x, #SRC=%d\n", adc_node->nid, spec->input_mux.num_items);
+	for (i = 0; i < spec->input_mux.num_items; i++)
+		snd_printdd("  [%s] IDX=0x%x\n", spec->input_mux.items[i].label,
+			    spec->input_mux.items[i].index);
+
+	spec->adc_node = adc_node;
+	return 1;
+}
+
+/*
+ * parse input
+ */
+static int parse_input(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct list_head *p;
+	struct hda_gnode *node;
+	int err;
+
+	/*
+	 * At first we look for an audio input widget.
+	 * If it reaches to certain input PINs, we take it as the
+	 * input path.
+	 */
+	list_for_each(p, &spec->nid_list) {
+		node = list_entry(p, struct hda_gnode, list);
+		if (node->wid_caps & AC_WCAP_DIGITAL)
+			continue; /* skip SPDIF */
+		if (node->type == AC_WID_AUD_IN) {
+			err = parse_input_path(codec, node);
+			if (err < 0)
+				return err;
+			else if (err > 0)
+				return 0;
+		}
+	}
+	snd_printd("hda_generic: no proper input path found\n");
+	return 0;
+}
+
+/*
+ * create mixer controls if possible
+ */
+#define DIR_OUT		0x1
+#define DIR_IN		0x2
+
+static int create_mixer(struct hda_codec *codec, struct hda_gnode *node,
+			unsigned int index, const char *type, const char *dir_sfx)
+{
+	char name[32];
+	int err;
+	int created = 0;
+	snd_kcontrol_new_t knew;
+
+	if (type)
+		sprintf(name, "%s %s Switch", type, dir_sfx);
+	else
+		sprintf(name, "%s Switch", dir_sfx);
+	if ((node->wid_caps & AC_WCAP_IN_AMP) &&
+	    (node->amp_in_caps & AC_AMPCAP_MUTE)) {
+		knew = (snd_kcontrol_new_t)HDA_CODEC_MUTE(name, node->nid, index, HDA_INPUT);
+		snd_printdd("[%s] NID=0x%x, DIR=IN, IDX=0x%x\n", name, node->nid, index);
+		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+			return err;
+		created = 1;
+	} else if ((node->wid_caps & AC_WCAP_OUT_AMP) &&
+		   (node->amp_out_caps & AC_AMPCAP_MUTE)) {
+		knew = (snd_kcontrol_new_t)HDA_CODEC_MUTE(name, node->nid, 0, HDA_OUTPUT);
+		snd_printdd("[%s] NID=0x%x, DIR=OUT\n", name, node->nid);
+		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+			return err;
+		created = 1;
+	}
+
+	if (type)
+		sprintf(name, "%s %s Volume", type, dir_sfx);
+	else
+		sprintf(name, "%s Volume", dir_sfx);
+	if ((node->wid_caps & AC_WCAP_IN_AMP) &&
+	    (node->amp_in_caps & AC_AMPCAP_NUM_STEPS)) {
+		knew = (snd_kcontrol_new_t)HDA_CODEC_VOLUME(name, node->nid, index, HDA_INPUT);
+		snd_printdd("[%s] NID=0x%x, DIR=IN, IDX=0x%x\n", name, node->nid, index);
+		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+			return err;
+		created = 1;
+	} else if ((node->wid_caps & AC_WCAP_OUT_AMP) &&
+		   (node->amp_out_caps & AC_AMPCAP_NUM_STEPS)) {
+		knew = (snd_kcontrol_new_t)HDA_CODEC_VOLUME(name, node->nid, 0, HDA_OUTPUT);
+		snd_printdd("[%s] NID=0x%x, DIR=OUT\n", name, node->nid);
+		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+			return err;
+		created = 1;
+	}
+
+	return created;
+}
+
+/*
+ * check whether the controls with the given name and direction suffix already exist
+ */
+static int check_existing_control(struct hda_codec *codec, const char *type, const char *dir)
+{
+	snd_ctl_elem_id_t id;
+	memset(&id, 0, sizeof(id));
+	sprintf(id.name, "%s %s Volume", type, dir);
+	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	if (snd_ctl_find_id(codec->bus->card, &id))
+		return 1;
+	sprintf(id.name, "%s %s Switch", type, dir);
+	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+	if (snd_ctl_find_id(codec->bus->card, &id))
+		return 1;
+	return 0;
+}
+
+/*
+ * build output mixer controls
+ */
+static int build_output_controls(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	int err;
+
+	err = create_mixer(codec, spec->pcm_vol_node, spec->pcm_vol_index,
+			   "PCM", "Playback");
+	if (err < 0)
+		return err;
+	return 0;
+}
+
+/* create capture volume/switch */
+static int build_input_controls(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct hda_gnode *adc_node = spec->adc_node;
+	int err;
+
+	if (! adc_node)
+		return 0; /* not found */
+
+	/* create capture volume and switch controls if the ADC has an amp */
+	err = create_mixer(codec, adc_node, 0, NULL, "Capture");
+
+	/* create input MUX if multiple sources are available */
+	if (spec->input_mux.num_items > 1) {
+		static snd_kcontrol_new_t cap_sel = {
+			.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+			.name = "Capture Source",
+			.info = capture_source_info,
+			.get = capture_source_get,
+			.put = capture_source_put,
+		};
+		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&cap_sel, codec))) < 0)
+			return err;
+		spec->cur_cap_src = 0;
+		select_input_connection(codec, adc_node, spec->input_mux.items[0].index);
+	}
+	return 0;
+}
+
+
+/*
+ * parse the nodes recursively until reach to the output PIN.
+ *
+ * returns 0 - if not found,
+ *         1 - if found, but no mixer is created
+ *         2 - if found and mixer was already created, (just skip)
+ *         a negative error code
+ */
+static int parse_loopback_path(struct hda_codec *codec, struct hda_gspec *spec,
+			       struct hda_gnode *node, struct hda_gnode *dest_node,
+			       const char *type)
+{
+	int i, err;
+
+	if (node->checked)
+		return 0;
+
+	node->checked = 1;
+	if (node == dest_node) {
+		/* loopback connection found */
+		return 1;
+	}
+
+	for (i = 0; i < node->nconns; i++) {
+		struct hda_gnode *child = hda_get_node(spec, node->conn_list[i]);
+		if (! child)
+			continue;
+		err = parse_loopback_path(codec, spec, child, dest_node, type);
+		if (err < 0)
+			return err;
+		else if (err >= 1) {
+			if (err == 1) {
+				err = create_mixer(codec, node, i, type, "Playback");
+				if (err < 0)
+					return err;
+				if (err > 0)
+					return 2; /* ok, created */
+				/* not created, maybe in the lower path */
+				err = 1;
+			}
+			/* connect and unmute */
+			if (node->nconns > 1)
+				select_input_connection(codec, node, i);
+			unmute_input(codec, node, i);
+			unmute_output(codec, node);
+			return err;
+		}
+	}
+	return 0;
+}
+
+/*
+ * parse the tree and build the loopback controls
+ */
+static int build_loopback_controls(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct list_head *p;
+	struct hda_gnode *node;
+	int err;
+	const char *type;
+
+	if (! spec->out_pin_node)
+		return 0;
+
+	list_for_each(p, &spec->nid_list) {
+		node = list_entry(p, struct hda_gnode, list);
+		if (node->type != AC_WID_PIN)
+			continue;
+		/* input capable? */
+		if (! (node->pin_caps & AC_PINCAP_IN))
+			return 0;
+		type = get_input_type(node, NULL);
+		if (type) {
+			if (check_existing_control(codec, type, "Playback"))
+				continue;
+			clear_check_flags(spec);
+			err = parse_loopback_path(codec, spec, spec->out_pin_node,
+						  node, type);
+			if (err < 0)
+				return err;
+			if (! err)
+				continue;
+		}
+	}
+	return 0;
+}
+
+/*
+ * build mixer controls
+ */
+static int build_generic_controls(struct hda_codec *codec)
+{
+	int err;
+
+	if ((err = build_input_controls(codec)) < 0 ||
+	    (err = build_output_controls(codec)) < 0 ||
+	    (err = build_loopback_controls(codec)) < 0)
+		return err;
+
+	return 0;
+}
+
+/*
+ * PCM
+ */
+static struct hda_pcm_stream generic_pcm_playback = {
+	.substreams = 1,
+	.channels_min = 2,
+	.channels_max = 2,
+};
+
+static int build_generic_pcms(struct hda_codec *codec)
+{
+	struct hda_gspec *spec = codec->spec;
+	struct hda_pcm *info = &spec->pcm_rec;
+
+	if (! spec->dac_node && ! spec->adc_node) {
+		snd_printd("hda_generic: no PCM found\n");
+		return 0;
+	}
+
+	codec->num_pcms = 1;
+	codec->pcm_info = info;
+
+	info->name = "HDA Generic";
+	if (spec->dac_node) {
+		info->stream[0] = generic_pcm_playback;
+		info->stream[0].nid = spec->dac_node->nid;
+	}
+	if (spec->adc_node) {
+		info->stream[1] = generic_pcm_playback;
+		info->stream[1].nid = spec->adc_node->nid;
+	}
+
+	return 0;
+}
+
+
+/*
+ */
+static struct hda_codec_ops generic_patch_ops = {
+	.build_controls = build_generic_controls,
+	.build_pcms = build_generic_pcms,
+	.free = snd_hda_generic_free,
+};
+
+/*
+ * the generic parser
+ */
+int snd_hda_parse_generic_codec(struct hda_codec *codec)
+{
+	struct hda_gspec *spec;
+	int err;
+
+	spec = kcalloc(1, sizeof(*spec), GFP_KERNEL);
+	if (spec == NULL) {
+		printk(KERN_ERR "hda_generic: can't allocate spec\n");
+		return -ENOMEM;
+	}
+	codec->spec = spec;
+	INIT_LIST_HEAD(&spec->nid_list);
+
+	if ((err = build_afg_tree(codec)) < 0)
+		goto error;
+
+	if ((err = parse_input(codec)) < 0 ||
+	    (err = parse_output(codec)) < 0)
+		goto error;
+
+	codec->patch_ops = generic_patch_ops;
+
+	return 0;
+
+ error:
+	snd_hda_generic_free(codec);
+	return err;
+}