path: root/sound/pci/hda/hda_generic.c

/*
 * 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 <linux/init.h>
#include <linux/slab.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_nid_t slist[2];	/* temporay list */
	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;
};

/* patch-specific record */

#define MAX_PCM_VOLS	2
struct pcm_vol {
	struct hda_gnode *node;	/* Node for PCM volume */
	unsigned int index;	/* connection of PCM volume */
};

struct hda_gspec {
	struct hda_gnode *dac_node[2];	/* DAC node */
	struct hda_gnode *out_pin_node[2];	/* Output pin (Line-Out) node */
	struct pcm_vol pcm_vol[MAX_PCM_VOLS];	/* PCM volumes */
	unsigned int pcm_vol_nodes;	/* number of PCM volumes */

	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 */

#ifdef CONFIG_SND_HDA_POWER_SAVE
#define MAX_LOOPBACK_AMPS	7
	struct hda_loopback_check loopback;
	int num_loopbacks;
	struct hda_amp_list loopback_list[MAX_LOOPBACK_AMPS + 1];
#endif
};

/*
 * retrieve the default device type from the default config value
 */
#define defcfg_type(node) (((node)->def_cfg & AC_DEFCFG_DEVICE) >> \
			   AC_DEFCFG_DEVICE_SHIFT)
#define defcfg_location(node) (((node)->def_cfg & AC_DEFCFG_LOCATION) >> \
			       AC_DEFCFG_LOCATION_SHIFT)
#define defcfg_port_conn(node) (((node)->def_cfg & AC_DEFCFG_PORT_CONN) >> \
				AC_DEFCFG_PORT_CONN_SHIFT)

/*
 * destructor
 */
static void snd_hda_generic_free(struct hda_codec *codec)
{
	struct hda_gspec *spec = codec->spec;
	struct hda_gnode *node, *n;

	if (! spec)
		return;
	/* free all widgets */
	list_for_each_entry_safe(node, n, &spec->nid_list, list) {
		if (node->conn_list != node->slist)
			kfree(node->conn_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;
	hda_nid_t conn_list[HDA_MAX_CONNECTIONS];

	node = kzalloc(sizeof(*node), GFP_KERNEL);
	if (node == NULL)
		return -ENOMEM;
	node->nid = nid;
	node->wid_caps = get_wcaps(codec, nid);
	node->type = get_wcaps_type(node->wid_caps);
	if (node->wid_caps & AC_WCAP_CONN_LIST) {
		nconns = snd_hda_get_connections(codec, nid, conn_list,
						 HDA_MAX_CONNECTIONS);
		if (nconns < 0) {
			kfree(node);
			return nconns;
		}
	} else {
		nconns = 0;
	}