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ALSA: usb-audio: simplify control interface access
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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 <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
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@tiwai
Daniel Mack authored and tiwai committed Jun 23, 2010
1 parent 157a57b commit 3d8d4dc
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Showing 8 changed files with 34 additions and 44 deletions.
22 changes: 9 additions & 13 deletions sound/usb/clock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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;

Expand All @@ -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;
}
Expand All @@ -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,
Expand Down Expand Up @@ -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;
Expand Down
4 changes: 1 addition & 3 deletions sound/usb/clock.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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 */
1 change: 1 addition & 0 deletions sound/usb/endpoint.c
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@
#include "pcm.h"
#include "helper.h"
#include "format.h"
#include "clock.h"

/*
* free a substream
Expand Down
9 changes: 4 additions & 5 deletions sound/usb/format.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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",
Expand Down Expand Up @@ -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;
}

Expand Down Expand Up @@ -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;
}
}
Expand Down
37 changes: 18 additions & 19 deletions sound/usb/mixer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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;
Expand All @@ -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;
}

Expand Down Expand Up @@ -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;

Expand All @@ -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;
}

Expand Down Expand Up @@ -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;
Expand All @@ -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) {
Expand Down Expand Up @@ -1913,7 +1913,7 @@ 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;
Expand Down Expand Up @@ -2005,7 +2005,7 @@ 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++) {
Expand Down Expand Up @@ -2123,7 +2123,7 @@ 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;
Expand Down Expand Up @@ -2166,7 +2166,6 @@ 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);
Expand Down
1 change: 0 additions & 1 deletion sound/usb/mixer.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand Down
3 changes: 0 additions & 3 deletions sound/usb/pcm.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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 */
1 change: 1 addition & 0 deletions sound/usb/quirks.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@
#include "helper.h"
#include "endpoint.h"
#include "pcm.h"
#include "clock.h"

/*
* handle the quirks for the contained interfaces
Expand Down

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