[alsa-devel] [PATCH 5/5] ALSA: usb-audio: simplify control interface access
Daniel Mack
daniel at caiaq.de
Wed Jun 16 17:57:31 CEST 2010
As the control interface is now carried in struct snd_usb_audio, we can
simplify the API a little and also drop the private ctrlif field from
struct usb_mixer_interface.
Also remove a left-over function prototype in pcm.h.
Signed-off-by: Daniel Mack <daniel at caiaq.de>
---
sound/usb/clock.c | 22 +++++++++-------------
sound/usb/clock.h | 4 +---
sound/usb/endpoint.c | 1 +
sound/usb/format.c | 9 ++++-----
sound/usb/mixer.c | 37 ++++++++++++++++++-------------------
sound/usb/mixer.h | 1 -
sound/usb/pcm.h | 3 ---
sound/usb/quirks.c | 1 +
8 files changed, 34 insertions(+), 44 deletions(-)
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 7279d61..66bd157 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -121,7 +121,6 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
}
static int __uac_clock_find_source(struct snd_usb_audio *chip,
- struct usb_host_interface *host_iface,
int entity_id, unsigned long *visited)
{
struct uac_clock_source_descriptor *source;
@@ -138,11 +137,11 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
}
/* first, see if the ID we're looking for is a clock source already */
- source = snd_usb_find_clock_source(host_iface, entity_id);
+ source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
if (source)
return source->bClockID;
- selector = snd_usb_find_clock_selector(host_iface, entity_id);
+ selector = snd_usb_find_clock_selector(chip->ctrl_intf, entity_id);
if (selector) {
int ret;
@@ -162,16 +161,15 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
return -EINVAL;
}
- return __uac_clock_find_source(chip, host_iface,
- selector->baCSourceID[ret-1],
+ return __uac_clock_find_source(chip, selector->baCSourceID[ret-1],
visited);
}
/* FIXME: multipliers only act as pass-thru element for now */
- multiplier = snd_usb_find_clock_multiplier(host_iface, entity_id);
+ multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id);
if (multiplier)
- return __uac_clock_find_source(chip, host_iface,
- multiplier->bCSourceID, visited);
+ return __uac_clock_find_source(chip, multiplier->bCSourceID,
+ visited);
return -EINVAL;
}
@@ -187,13 +185,11 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
*
* Returns the clock source UnitID (>=0) on success, or an error.
*/
-int snd_usb_clock_find_source(struct snd_usb_audio *chip,
- struct usb_host_interface *host_iface,
- int entity_id)
+int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id)
{
DECLARE_BITMAP(visited, 256);
memset(visited, 0, sizeof(visited));
- return __uac_clock_find_source(chip, host_iface, entity_id, visited);
+ return __uac_clock_find_source(chip, entity_id, visited);
}
static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
@@ -251,7 +247,7 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
struct usb_device *dev = chip->dev;
unsigned char data[4];
int err, crate;
- int clock = snd_usb_clock_find_source(chip, chip->ctrl_intf, fmt->clock);
+ int clock = snd_usb_clock_find_source(chip, fmt->clock);
if (clock < 0)
return clock;
diff --git a/sound/usb/clock.h b/sound/usb/clock.h
index beb2536..4663093 100644
--- a/sound/usb/clock.h
+++ b/sound/usb/clock.h
@@ -5,8 +5,6 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt, int rate);
-int snd_usb_clock_find_source(struct snd_usb_audio *chip,
- struct usb_host_interface *host_iface,
- int entity_id);
+int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id);
#endif /* __USBAUDIO_CLOCK_H */
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 289a165..6ce4ed1 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -33,6 +33,7 @@
#include "pcm.h"
#include "helper.h"
#include "format.h"
+#include "clock.h"
/*
* free a substream
diff --git a/sound/usb/format.c b/sound/usb/format.c
index 30364ab..4387f54 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -264,13 +264,12 @@ static int parse_uac2_sample_rate_range(struct audioformat *fp, int nr_triplets,
* on the audioformat table (audio class v2).
*/
static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
- struct audioformat *fp,
- struct usb_host_interface *iface)
+ struct audioformat *fp)
{
struct usb_device *dev = chip->dev;
unsigned char tmp[2], *data;
int nr_triplets, data_size, ret = 0;
- int clock = snd_usb_clock_find_source(chip, chip->ctrl_intf, fp->clock);
+ int clock = snd_usb_clock_find_source(chip, fp->clock);
if (clock < 0) {
snd_printk(KERN_ERR "%s(): unable to find clock source (clock %d)\n",
@@ -391,7 +390,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
break;
case UAC_VERSION_2:
/* fp->channels is already set in this case */
- ret = parse_audio_format_rates_v2(chip, fp, iface);
+ ret = parse_audio_format_rates_v2(chip, fp);
break;
}
@@ -450,7 +449,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
framesize = le16_to_cpu(fmt->wSamplesPerFrame);
snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
fp->frame_size = framesize;
- ret = parse_audio_format_rates_v2(chip, fp, iface);
+ ret = parse_audio_format_rates_v2(chip, fp);
break;
}
}
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 7ffea71..a8911d9 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -291,16 +291,15 @@ static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
unsigned char buf[2];
int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
int timeout = 10;
while (timeout-- > 0) {
- if (snd_usb_ctl_msg(cval->mixer->chip->dev,
- usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
- request,
+ if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- validx, cval->mixer->ctrlif | (cval->id << 8),
+ validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
buf, val_len, 100) >= val_len) {
*value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
return 0;
@@ -313,6 +312,7 @@ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int v
static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
unsigned char *val;
int ret, size;
@@ -328,16 +328,14 @@ static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int v
memset(buf, 0, sizeof(buf));
- ret = snd_usb_ctl_msg(cval->mixer->chip->dev,
- usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
- bRequest,
+ ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- validx, cval->mixer->ctrlif | (cval->id << 8),
+ validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
buf, size, 1000);
if (ret < 0) {
snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
- request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type);
+ request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type);
return ret;
}
@@ -413,6 +411,7 @@ static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
int request, int validx, int value_set)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
unsigned char buf[2];
int val_len, timeout = 10;
@@ -435,15 +434,14 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
buf[0] = value_set & 0xff;
buf[1] = (value_set >> 8) & 0xff;
while (timeout-- > 0)
- if (snd_usb_ctl_msg(cval->mixer->chip->dev,
- usb_sndctrlpipe(cval->mixer->chip->dev, 0),
- request,
+ if (snd_usb_ctl_msg(chip->dev,
+ usb_sndctrlpipe(chip->dev, 0), request,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- validx, cval->mixer->ctrlif | (cval->id << 8),
+ validx, snd_usb_ctrl_intf(chip) | (cval->id << 8),
buf, val_len, 100) >= 0)
return 0;
snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
- request, validx, cval->mixer->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]);
+ request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]);
return -EINVAL;
}
@@ -761,6 +759,8 @@ static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
*/
static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
{
+ struct snd_usb_audio *chip = cval->mixer->chip;
+
/* for failsafe */
cval->min = default_min;
cval->max = cval->min + 1;
@@ -783,7 +783,7 @@ static int get_min_max(struct usb_mixer_elem_info *cval, int default_min)
if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
- cval->id, cval->mixer->ctrlif, cval->control, cval->id);
+ cval->id, snd_usb_ctrl_intf(chip), cval->control, cval->id);
return -EINVAL;
}
if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
@@ -1900,7 +1900,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
struct usb_host_interface *hostif;
void *p;
- hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
+ hostif = mixer->chip->ctrl_intf;
memset(&state, 0, sizeof(state));
state.chip = mixer->chip;
state.mixer = mixer;
@@ -1992,7 +1992,7 @@ static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
list_for_each_entry(mixer, &chip->mixer_list, list) {
snd_iprintf(buffer,
"USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
- chip->usb_id, mixer->ctrlif,
+ chip->usb_id, snd_usb_ctrl_intf(chip),
mixer->ignore_ctl_error);
snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
@@ -2110,7 +2110,7 @@ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
int buffer_length;
unsigned int epnum;
- hostif = &usb_ifnum_to_if(mixer->chip->dev, mixer->ctrlif)->altsetting[0];
+ hostif = mixer->chip->ctrl_intf;
/* we need one interrupt input endpoint */
if (get_iface_desc(hostif)->bNumEndpoints < 1)
return 0;
@@ -2153,7 +2153,6 @@ int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
if (!mixer)
return -ENOMEM;
mixer->chip = chip;
- mixer->ctrlif = ctrlif;
mixer->ignore_ctl_error = ignore_error;
mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
GFP_KERNEL);
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index a7cf100..26c636c 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -3,7 +3,6 @@
struct usb_mixer_interface {
struct snd_usb_audio *chip;
- unsigned int ctrlif;
struct list_head list;
unsigned int ignore_ctl_error;
struct urb *urb;
diff --git a/sound/usb/pcm.h b/sound/usb/pcm.h
index 1c931b6..ed3e283 100644
--- a/sound/usb/pcm.h
+++ b/sound/usb/pcm.h
@@ -7,8 +7,5 @@ int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt);
-int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
- struct usb_host_interface *alts,
- struct audioformat *fmt, int rate);
#endif /* __USBAUDIO_PCM_H */
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index b45e54c..9a9da09 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -32,6 +32,7 @@
#include "helper.h"
#include "endpoint.h"
#include "pcm.h"
+#include "clock.h"
/*
* handle the quirks for the contained interfaces
--
1.7.1
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