2015-02-18 04:46:37 +08:00
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/*
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* HD-audio core stuff
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*/
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#ifndef __SOUND_HDAUDIO_H
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#define __SOUND_HDAUDIO_H
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#include <linux/device.h>
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2015-03-03 06:22:59 +08:00
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#include <sound/hda_verbs.h>
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2015-03-03 17:07:24 +08:00
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/* codec node id */
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typedef u16 hda_nid_t;
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2015-03-03 06:22:59 +08:00
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struct hdac_bus;
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struct hdac_device;
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struct hdac_driver;
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ALSA: hda - Add widget sysfs tree
This patch changes the sysfs files assigned to the codec device on the
bus which were formerly identical with hwdep sysfs files. Now it
shows only a few core parameter, vendor_id, subsystem_id, revision_id,
afg, mfg, vendor_name and chip_name.
In addition, now a widget tree is added to the bus device sysfs
directory for showing the widget topology and attributes. It's just a
flat tree consisting of subdirectories named as the widget NID
including various attributes like widget capability bits. The AFG
(usually NID 0x01) is always found there, and it contains always
amp_in_caps, amp_out_caps and power_caps files. Each of these
attributes show a single value. The rest are the widget nodes
belonging to that AFG. Note that the child node might not start from
0x02 but from another value like 0x0a.
Each child node may contain caps, pin_caps, amp_in_caps, amp_out_caps,
power_caps and connections files. The caps (representing the widget
capability bits) always contain a value. The rest may contain
value(s) if the attribute exists on the node. Only connections file
show multiple values while other attributes have zero or one single
value.
An example of ls -R output is like below:
% ls -R /sys/bus/hdaudio/devices/hdaudioC0D0/
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/:
01/ 04/ 07/ 0a/ 0d/ 10/ 13/ 16/ 19/ 1c/ 1f/ 22/
02/ 05/ 08/ 0b/ 0e/ 11/ 14/ 17/ 1a/ 1d/ 20/ 23/
03/ 06/ 09/ 0c/ 0f/ 12/ 15/ 18/ 1b/ 1e/ 21/
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/01:
amp_in_caps amp_out_caps power_caps
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/02:
amp_in_caps amp_out_caps caps connections pin_caps pin_cfg
power_caps
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/03:
.....
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-24 21:59:42 +08:00
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struct hdac_widget_tree;
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2015-02-18 04:46:37 +08:00
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/*
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* exported bus type
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*/
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extern struct bus_type snd_hda_bus_type;
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2015-03-04 00:33:10 +08:00
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/*
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* generic arrays
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*/
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struct snd_array {
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unsigned int used;
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unsigned int alloced;
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unsigned int elem_size;
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unsigned int alloc_align;
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void *list;
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};
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2015-02-18 04:46:37 +08:00
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/*
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* HD-audio codec base device
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*/
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struct hdac_device {
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struct device dev;
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int type;
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2015-03-03 06:22:59 +08:00
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struct hdac_bus *bus;
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unsigned int addr; /* codec address */
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struct list_head list; /* list point for bus codec_list */
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2015-03-03 17:07:24 +08:00
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hda_nid_t afg; /* AFG node id */
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hda_nid_t mfg; /* MFG node id */
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/* ids */
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unsigned int vendor_id;
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unsigned int subsystem_id;
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unsigned int revision_id;
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unsigned int afg_function_id;
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unsigned int mfg_function_id;
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unsigned int afg_unsol:1;
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unsigned int mfg_unsol:1;
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unsigned int power_caps; /* FG power caps */
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const char *vendor_name; /* codec vendor name */
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const char *chip_name; /* codec chip name */
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2015-03-03 22:40:08 +08:00
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/* verb exec op override */
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int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
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unsigned int flags, unsigned int *res);
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2015-03-03 17:07:24 +08:00
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/* widgets */
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unsigned int num_nodes;
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hda_nid_t start_nid, end_nid;
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/* misc flags */
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atomic_t in_pm; /* suspend/resume being performed */
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ALSA: hda - Add widget sysfs tree
This patch changes the sysfs files assigned to the codec device on the
bus which were formerly identical with hwdep sysfs files. Now it
shows only a few core parameter, vendor_id, subsystem_id, revision_id,
afg, mfg, vendor_name and chip_name.
In addition, now a widget tree is added to the bus device sysfs
directory for showing the widget topology and attributes. It's just a
flat tree consisting of subdirectories named as the widget NID
including various attributes like widget capability bits. The AFG
(usually NID 0x01) is always found there, and it contains always
amp_in_caps, amp_out_caps and power_caps files. Each of these
attributes show a single value. The rest are the widget nodes
belonging to that AFG. Note that the child node might not start from
0x02 but from another value like 0x0a.
Each child node may contain caps, pin_caps, amp_in_caps, amp_out_caps,
power_caps and connections files. The caps (representing the widget
capability bits) always contain a value. The rest may contain
value(s) if the attribute exists on the node. Only connections file
show multiple values while other attributes have zero or one single
value.
An example of ls -R output is like below:
% ls -R /sys/bus/hdaudio/devices/hdaudioC0D0/
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/:
01/ 04/ 07/ 0a/ 0d/ 10/ 13/ 16/ 19/ 1c/ 1f/ 22/
02/ 05/ 08/ 0b/ 0e/ 11/ 14/ 17/ 1a/ 1d/ 20/ 23/
03/ 06/ 09/ 0c/ 0f/ 12/ 15/ 18/ 1b/ 1e/ 21/
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/01:
amp_in_caps amp_out_caps power_caps
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/02:
amp_in_caps amp_out_caps caps connections pin_caps pin_cfg
power_caps
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/03:
.....
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-24 21:59:42 +08:00
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/* sysfs */
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struct hdac_widget_tree *widgets;
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 21:42:38 +08:00
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/* regmap */
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struct regmap *regmap;
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2015-02-26 19:29:03 +08:00
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struct snd_array vendor_verbs;
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ALSA: hda - Add regmap support
This patch adds an infrastructure to support regmap-based verb
accesses. Because o the asymmetric nature of HD-audio verbs,
especially the amp verbs, we need to translate the verbs as a sort of
pseudo registers to be mapped uniquely in regmap.
In this patch, a pseudo register is built from the NID, the
AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent
to HD-audio bus but without codec address field. OTOH, for writing,
the same pseudo register is translated to AC_VERB_SET_* automatically.
The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding
AC_VERB_GET_AMP_* verb and parameter at writing.
Some verbs has a single command for read but multiple for writes. A
write for such a verb is split automatically to multiple verbs.
The patch provides also a few handy helper functions. They are
designed to be accessible even without regmap. When no regmap is set
up (e.g. before the codec device instantiation), the direct hardware
access is used. Also, it tries to avoid the unnecessary power-up.
The power up/down sequence is performed only on demand.
The codec driver needs to call snd_hdac_regmap_exit() and
snd_hdac_regmap_exit() at probe and remove if it wants the regmap
access.
There is one flag added to hdac_device. When the flag lazy_cache is
set, regmap helper ignores a write for a suspended device and returns
as if it was actually written. It reduces the hardware access pretty
much, e.g. when adjusting the mixer volume while in idle. This
assumes that the driver will sync the cache later at resume properly,
so use it carefully.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-25 21:42:38 +08:00
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bool lazy_cache:1; /* don't wake up for writes */
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2015-02-26 15:54:56 +08:00
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bool caps_overwriting:1; /* caps overwrite being in process */
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2015-03-13 22:56:25 +08:00
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bool cache_coef:1; /* cache COEF read/write too */
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2015-02-18 04:46:37 +08:00
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};
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/* device/driver type used for matching */
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enum {
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HDA_DEV_CORE,
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HDA_DEV_LEGACY,
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};
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2015-03-03 17:07:24 +08:00
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/* direction */
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enum {
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HDA_INPUT, HDA_OUTPUT
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};
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2015-02-18 04:46:37 +08:00
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#define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
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2015-03-03 17:07:24 +08:00
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int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
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const char *name, unsigned int addr);
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void snd_hdac_device_exit(struct hdac_device *dev);
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ALSA: hda - Add widget sysfs tree
This patch changes the sysfs files assigned to the codec device on the
bus which were formerly identical with hwdep sysfs files. Now it
shows only a few core parameter, vendor_id, subsystem_id, revision_id,
afg, mfg, vendor_name and chip_name.
In addition, now a widget tree is added to the bus device sysfs
directory for showing the widget topology and attributes. It's just a
flat tree consisting of subdirectories named as the widget NID
including various attributes like widget capability bits. The AFG
(usually NID 0x01) is always found there, and it contains always
amp_in_caps, amp_out_caps and power_caps files. Each of these
attributes show a single value. The rest are the widget nodes
belonging to that AFG. Note that the child node might not start from
0x02 but from another value like 0x0a.
Each child node may contain caps, pin_caps, amp_in_caps, amp_out_caps,
power_caps and connections files. The caps (representing the widget
capability bits) always contain a value. The rest may contain
value(s) if the attribute exists on the node. Only connections file
show multiple values while other attributes have zero or one single
value.
An example of ls -R output is like below:
% ls -R /sys/bus/hdaudio/devices/hdaudioC0D0/
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/:
01/ 04/ 07/ 0a/ 0d/ 10/ 13/ 16/ 19/ 1c/ 1f/ 22/
02/ 05/ 08/ 0b/ 0e/ 11/ 14/ 17/ 1a/ 1d/ 20/ 23/
03/ 06/ 09/ 0c/ 0f/ 12/ 15/ 18/ 1b/ 1e/ 21/
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/01:
amp_in_caps amp_out_caps power_caps
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/02:
amp_in_caps amp_out_caps caps connections pin_caps pin_cfg
power_caps
/sys/bus/hdaudio/devices/hdaudioC0D0/widgets/03:
.....
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-02-24 21:59:42 +08:00
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int snd_hdac_device_register(struct hdac_device *codec);
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void snd_hdac_device_unregister(struct hdac_device *codec);
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2015-03-03 17:07:24 +08:00
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int snd_hdac_refresh_widgets(struct hdac_device *codec);
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unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
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unsigned int verb, unsigned int parm);
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2015-03-03 22:40:08 +08:00
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int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
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unsigned int flags, unsigned int *res);
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2015-03-03 17:07:24 +08:00
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int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
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unsigned int verb, unsigned int parm, unsigned int *res);
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2015-02-26 20:57:47 +08:00
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int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
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unsigned int *res);
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2015-03-04 06:29:47 +08:00
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int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
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int parm);
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2015-02-26 15:54:56 +08:00
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int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
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unsigned int parm, unsigned int val);
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2015-03-03 17:07:24 +08:00
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int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
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hda_nid_t *conn_list, int max_conns);
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int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
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hda_nid_t *start_id);
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2015-02-26 20:57:47 +08:00
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/**
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* snd_hdac_read_parm - read a codec parameter
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* @codec: the codec object
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* @nid: NID to read a parameter
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* @parm: parameter to read
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*
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* Returns -1 for error. If you need to distinguish the error more
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* strictly, use _snd_hdac_read_parm() directly.
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*/
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static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
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int parm)
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{
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unsigned int val;
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return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
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}
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2015-03-03 17:07:24 +08:00
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#ifdef CONFIG_PM
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void snd_hdac_power_up(struct hdac_device *codec);
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void snd_hdac_power_down(struct hdac_device *codec);
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#else
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static inline void snd_hdac_power_up(struct hdac_device *codec) {}
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static inline void snd_hdac_power_down(struct hdac_device *codec) {}
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#endif
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ALSA: hda - Work around races of power up/down with runtime PM
Currently, snd_hdac_power_up()/down() helpers checks whether the codec
is being in pm (suspend/resume), and skips the call of runtime get/put
during it. This is needed as there are lots of power up/down
sequences called in the paths that are also used in the PM itself. An
example is found in hda_codec.c::codec_exec_verb(), where this can
power up the codec while it may be called again in its power up
sequence, too.
The above works in most cases, but sometimes we really want to wait
for the real power up. For example, the control element get/put may
want explicit power up so that the value change is assured to reach to
the hardware. Using the current snd_hdac_power_up(), however,
results in a race, e.g. when it's called during the runtime suspend is
being performed. In the worst case, as found in patch_ca0132.c, it
can even lead to the deadlock because the code assumes the power up
while it was skipped due to the check above.
For dealing with such cases, this patch makes snd_hdac_power_up() and
_down() to two variants: with and without in_pm flag check. The
version with pm flag check is named as snd_hdac_power_up_pm() while
the version without pm flag check is still kept as
snd_hdac_power_up(). (Just because the usage of the former is fewer.)
Then finally, the patch replaces each call potentially done in PM with
the new _pm() variant.
In theory, we can implement a unified version -- if we can distinguish
the current context whether it's in the pm path. But such an
implementation is cumbersome, so leave the code like this a bit messy
way for now...
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=96271
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-08 17:43:14 +08:00
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/**
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* snd_hdac_power_up_pm - power up the codec
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* @codec: the codec object
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*
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* This function can be called in a recursive code path like init code
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* which may be called by PM suspend/resume again. OTOH, if a power-up
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* call must wake up the sleeper (e.g. in a kctl callback), use
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* snd_hdac_power_up() instead.
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*/
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static inline void snd_hdac_power_up_pm(struct hdac_device *codec)
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{
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if (!atomic_read(&codec->in_pm))
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snd_hdac_power_up(codec);
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}
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/**
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* snd_hdac_power_down_pm - power down the codec
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* @codec: the codec object
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*
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* Like snd_hdac_power_up_pm(), this function is used in a recursive
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* code path like init code which may be called by PM suspend/resume again.
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*/
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static inline void snd_hdac_power_down_pm(struct hdac_device *codec)
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{
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if (!atomic_read(&codec->in_pm))
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snd_hdac_power_down(codec);
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}
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2015-02-18 04:46:37 +08:00
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/*
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* HD-audio codec base driver
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*/
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struct hdac_driver {
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struct device_driver driver;
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int type;
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int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
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2015-03-03 06:22:59 +08:00
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void (*unsol_event)(struct hdac_device *dev, unsigned int event);
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2015-02-18 04:46:37 +08:00
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};
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#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
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2015-03-03 06:22:59 +08:00
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/*
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* HD-audio bus base driver
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*/
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struct hdac_bus_ops {
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/* send a single command */
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int (*command)(struct hdac_bus *bus, unsigned int cmd);
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/* get a response from the last command */
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int (*get_response)(struct hdac_bus *bus, unsigned int addr,
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unsigned int *res);
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};
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#define HDA_UNSOL_QUEUE_SIZE 64
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struct hdac_bus {
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struct device *dev;
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const struct hdac_bus_ops *ops;
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/* codec linked list */
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struct list_head codec_list;
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unsigned int num_codecs;
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/* link caddr -> codec */
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struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
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/* unsolicited event queue */
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u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
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unsigned int unsol_rp, unsol_wp;
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struct work_struct unsol_work;
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/* bit flags of powered codecs */
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|
|
unsigned long codec_powered;
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|
|
/* flags */
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|
bool sync_write:1; /* sync after verb write */
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|
|
/* locks */
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|
|
|
|
struct mutex cmd_mutex;
|
|
|
|
|
};
|
|
|
|
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|
|
|
|
|
int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
|
|
|
|
|
const struct hdac_bus_ops *ops);
|
|
|
|
|
void snd_hdac_bus_exit(struct hdac_bus *bus);
|
|
|
|
|
int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
|
|
|
|
|
unsigned int cmd, unsigned int *res);
|
|
|
|
|
int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
|
|
|
|
|
unsigned int cmd, unsigned int *res);
|
|
|
|
|
void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
|
|
|
|
|
|
|
|
|
|
int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
|
|
|
|
|
void snd_hdac_bus_remove_device(struct hdac_bus *bus,
|
|
|
|
|
struct hdac_device *codec);
|
|
|
|
|
|
2015-03-03 17:07:24 +08:00
|
|
|
static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
|
|
|
|
|
{
|
|
|
|
|
set_bit(codec->addr, &codec->bus->codec_powered);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
|
|
|
|
|
{
|
|
|
|
|
clear_bit(codec->addr, &codec->bus->codec_powered);
|
|
|
|
|
}
|
|
|
|
|
|
2015-03-04 00:33:10 +08:00
|
|
|
/*
|
|
|
|
|
* generic array helpers
|
|
|
|
|
*/
|
|
|
|
|
void *snd_array_new(struct snd_array *array);
|
|
|
|
|
void snd_array_free(struct snd_array *array);
|
|
|
|
|
static inline void snd_array_init(struct snd_array *array, unsigned int size,
|
|
|
|
|
unsigned int align)
|
|
|
|
|
{
|
|
|
|
|
array->elem_size = size;
|
|
|
|
|
array->alloc_align = align;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
|
|
|
|
|
{
|
|
|
|
|
return array->list + idx * array->elem_size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
|
|
|
|
|
{
|
|
|
|
|
return (unsigned long)(ptr - array->list) / array->elem_size;
|
|
|
|
|
}
|
|
|
|
|
|
2015-02-18 04:46:37 +08:00
|
|
|
#endif /* __SOUND_HDAUDIO_H */
|