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Diffstat (limited to 'sound/usb/clock.c')
-rw-r--r--sound/usb/clock.c71
1 files changed, 33 insertions, 38 deletions
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index b7aadd614c7..b853f8df794 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -19,33 +19,19 @@
#include <linux/bitops.h>
#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/slab.h>
#include <linux/string.h>
#include <linux/usb.h>
-#include <linux/moduleparam.h>
-#include <linux/mutex.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/initval.h>
#include "usbaudio.h"
#include "card.h"
-#include "midi.h"
-#include "mixer.h"
-#include "proc.h"
-#include "quirks.h"
-#include "endpoint.h"
#include "helper.h"
-#include "debug.h"
-#include "pcm.h"
-#include "urb.h"
-#include "format.h"
+#include "clock.h"
static struct uac_clock_source_descriptor *
snd_usb_find_clock_source(struct usb_host_interface *ctrl_iface,
@@ -103,7 +89,8 @@ static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int selector_i
ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0),
UAC2_CS_CUR,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- UAC2_CX_CLOCK_SELECTOR << 8, selector_id << 8,
+ UAC2_CX_CLOCK_SELECTOR << 8,
+ snd_usb_ctrl_intf(chip) | (selector_id << 8),
&buf, sizeof(buf), 1000);
if (ret < 0)
@@ -120,7 +107,8 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- UAC2_CS_CONTROL_CLOCK_VALID << 8, source_id << 8,
+ UAC2_CS_CONTROL_CLOCK_VALID << 8,
+ snd_usb_ctrl_intf(chip) | (source_id << 8),
&data, sizeof(data), 1000);
if (err < 0) {
@@ -132,10 +120,7 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
return !!data;
}
-/* Try to find the clock source ID of a given clock entity */
-
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;
@@ -152,11 +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;
@@ -166,6 +151,8 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
if (ret < 0)
return ret;
+ /* Selector values are one-based */
+
if (ret > selector->bNrInPins || ret < 1) {
printk(KERN_ERR
"%s(): selector reported illegal value, id %d, ret %d\n",
@@ -174,27 +161,35 @@ 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;
}
-int snd_usb_clock_find_source(struct snd_usb_audio *chip,
- struct usb_host_interface *host_iface,
- int entity_id)
+/*
+ * For all kinds of sample rate settings and other device queries,
+ * the clock source (end-leaf) must be used. However, clock selectors,
+ * clock multipliers and sample rate converters may be specified as
+ * clock source input to terminal. This functions walks the clock path
+ * to its end and tries to find the source.
+ *
+ * The 'visited' bitfield is used internally to detect recursive loops.
+ *
+ * Returns the clock source UnitID (>=0) on success, or an error.
+ */
+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,
@@ -209,11 +204,8 @@ static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
ep = get_endpoint(alts, 0)->bEndpointAddress;
/* if endpoint doesn't have sampling rate control, bail out */
- if (!(fmt->attributes & UAC_EP_CS_ATTR_SAMPLE_RATE)) {
- snd_printk(KERN_WARNING "%d:%d:%d: endpoint lacks sample rate attribute bit, cannot set.\n",
- dev->devnum, iface, fmt->altsetting);
+ if (!(fmt->attributes & UAC_EP_CS_ATTR_SAMPLE_RATE))
return 0;
- }
data[0] = rate;
data[1] = rate >> 8;
@@ -252,12 +244,13 @@ 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;
if (!uac_clock_source_is_valid(chip, clock)) {
+ /* TODO: should we try to find valid clock setups by ourself? */
snd_printk(KERN_ERR "%d:%d:%d: clock source %d is not valid, cannot use\n",
dev->devnum, iface, fmt->altsetting, clock);
return -ENXIO;
@@ -269,7 +262,8 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
data[3] = rate >> 24;
if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
- UAC2_CS_CONTROL_SAM_FREQ << 8, clock << 8,
+ UAC2_CS_CONTROL_SAM_FREQ << 8,
+ snd_usb_ctrl_intf(chip) | (clock << 8),
data, sizeof(data), 1000)) < 0) {
snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d (v2)\n",
dev->devnum, iface, fmt->altsetting, rate);
@@ -278,7 +272,8 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- UAC2_CS_CONTROL_SAM_FREQ << 8, clock << 8,
+ UAC2_CS_CONTROL_SAM_FREQ << 8,
+ snd_usb_ctrl_intf(chip) | (clock << 8),
data, sizeof(data), 1000)) < 0) {
snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n",
dev->devnum, iface, fmt->altsetting);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-08 07:33:03 +0000