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d8a766a16e
Now we create the standard HD-audio bus (/sys/bus/hdaudio), and bind the codec driver with the codec device over there. This is the first step of the whole transition so that the changes to each codec driver are kept as minimal as possible. Each codec driver needs to register hda_codec_driver struct containing the currently existing preset via the new helper macro module_hda_codec_driver(). The old hda_codec_preset_list is replaced with this infrastructure. The generic parsers (for HDMI and other) are also included in the preset with the special IDs to bind uniquely. In HD-audio core side, the device binding code is split to hda_bind.c. It provides the snd_hda_bus_type implementation to match the codec driver with the given codec vendor ID. It also manages the module auto-loading by itself like before: when the matching isn't found, it tries to probe the corresponding codec modules, and finally falls back to the generic drivers. (The special ID mentioned above is set at this stage.) The only visible change to outside is that the hdaudio sysfs entry now appears in /sys/bus/devices, not as a sound class device. More works to move the suspend/resume and remove ops will be (hopefully) done in later patches. Signed-off-by: Takashi Iwai <tiwai@suse.de>
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/*
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* Universal Interface for Intel High Definition Audio Codec
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*
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* HD audio interface patch for C-Media CMI9880
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*
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* Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
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*
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*
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* This driver is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This driver is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include "hda_codec.h"
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#include "hda_local.h"
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#include "hda_auto_parser.h"
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#include "hda_jack.h"
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#include "hda_generic.h"
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struct cmi_spec {
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struct hda_gen_spec gen;
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};
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/*
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* stuff for auto-parser
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*/
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static const struct hda_codec_ops cmi_auto_patch_ops = {
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.build_controls = snd_hda_gen_build_controls,
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.build_pcms = snd_hda_gen_build_pcms,
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.init = snd_hda_gen_init,
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.free = snd_hda_gen_free,
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.unsol_event = snd_hda_jack_unsol_event,
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};
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static int patch_cmi9880(struct hda_codec *codec)
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{
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struct cmi_spec *spec;
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struct auto_pin_cfg *cfg;
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int err;
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spec = kzalloc(sizeof(*spec), GFP_KERNEL);
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if (spec == NULL)
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return -ENOMEM;
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codec->spec = spec;
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cfg = &spec->gen.autocfg;
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snd_hda_gen_spec_init(&spec->gen);
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err = snd_hda_parse_pin_defcfg(codec, cfg, NULL, 0);
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if (err < 0)
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goto error;
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err = snd_hda_gen_parse_auto_config(codec, cfg);
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if (err < 0)
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goto error;
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codec->patch_ops = cmi_auto_patch_ops;
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return 0;
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error:
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snd_hda_gen_free(codec);
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return err;
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}
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static int patch_cmi8888(struct hda_codec *codec)
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{
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struct cmi_spec *spec;
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struct auto_pin_cfg *cfg;
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int err;
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spec = kzalloc(sizeof(*spec), GFP_KERNEL);
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if (!spec)
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return -ENOMEM;
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codec->spec = spec;
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cfg = &spec->gen.autocfg;
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snd_hda_gen_spec_init(&spec->gen);
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/* mask NID 0x10 from the playback volume selection;
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* it's a headphone boost volume handled manually below
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*/
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spec->gen.out_vol_mask = (1ULL << 0x10);
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err = snd_hda_parse_pin_defcfg(codec, cfg, NULL, 0);
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if (err < 0)
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goto error;
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err = snd_hda_gen_parse_auto_config(codec, cfg);
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if (err < 0)
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goto error;
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if (get_defcfg_device(snd_hda_codec_get_pincfg(codec, 0x10)) ==
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AC_JACK_HP_OUT) {
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static const struct snd_kcontrol_new amp_kctl =
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HDA_CODEC_VOLUME("Headphone Amp Playback Volume",
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0x10, 0, HDA_OUTPUT);
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if (!snd_hda_gen_add_kctl(&spec->gen, NULL, &_kctl)) {
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err = -ENOMEM;
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goto error;
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}
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}
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codec->patch_ops = cmi_auto_patch_ops;
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return 0;
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error:
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snd_hda_gen_free(codec);
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return err;
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}
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/*
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* patch entries
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*/
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static const struct hda_codec_preset snd_hda_preset_cmedia[] = {
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{ .id = 0x13f68888, .name = "CMI8888", .patch = patch_cmi8888 },
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{ .id = 0x13f69880, .name = "CMI9880", .patch = patch_cmi9880 },
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{ .id = 0x434d4980, .name = "CMI9880", .patch = patch_cmi9880 },
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{} /* terminator */
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};
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MODULE_ALIAS("snd-hda-codec-id:13f68888");
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MODULE_ALIAS("snd-hda-codec-id:13f69880");
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MODULE_ALIAS("snd-hda-codec-id:434d4980");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("C-Media HD-audio codec");
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static struct hda_codec_driver cmedia_driver = {
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.preset = snd_hda_preset_cmedia,
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};
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module_hda_codec_driver(cmedia_driver);
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