summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/sound/usb/clock.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/sound/usb/clock.c')
-rw-r--r--ANDROID_3.4.5/sound/usb/clock.c318
1 files changed, 0 insertions, 318 deletions
diff --git a/ANDROID_3.4.5/sound/usb/clock.c b/ANDROID_3.4.5/sound/usb/clock.c
deleted file mode 100644
index 6026e0e1..00000000
--- a/ANDROID_3.4.5/sound/usb/clock.c
+++ /dev/null
@@ -1,318 +0,0 @@
-/*
- * Clock domain and sample rate management functions
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <linux/bitops.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/usb.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 "usbaudio.h"
-#include "card.h"
-#include "helper.h"
-#include "clock.h"
-
-static struct uac_clock_source_descriptor *
- snd_usb_find_clock_source(struct usb_host_interface *ctrl_iface,
- int clock_id)
-{
- struct uac_clock_source_descriptor *cs = NULL;
-
- while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
- ctrl_iface->extralen,
- cs, UAC2_CLOCK_SOURCE))) {
- if (cs->bClockID == clock_id)
- return cs;
- }
-
- return NULL;
-}
-
-static struct uac_clock_selector_descriptor *
- snd_usb_find_clock_selector(struct usb_host_interface *ctrl_iface,
- int clock_id)
-{
- struct uac_clock_selector_descriptor *cs = NULL;
-
- while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
- ctrl_iface->extralen,
- cs, UAC2_CLOCK_SELECTOR))) {
- if (cs->bClockID == clock_id)
- return cs;
- }
-
- return NULL;
-}
-
-static struct uac_clock_multiplier_descriptor *
- snd_usb_find_clock_multiplier(struct usb_host_interface *ctrl_iface,
- int clock_id)
-{
- struct uac_clock_multiplier_descriptor *cs = NULL;
-
- while ((cs = snd_usb_find_csint_desc(ctrl_iface->extra,
- ctrl_iface->extralen,
- cs, UAC2_CLOCK_MULTIPLIER))) {
- if (cs->bClockID == clock_id)
- return cs;
- }
-
- return NULL;
-}
-
-static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int selector_id)
-{
- unsigned char buf;
- int ret;
-
- 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,
- snd_usb_ctrl_intf(chip) | (selector_id << 8),
- &buf, sizeof(buf));
-
- if (ret < 0)
- return ret;
-
- return buf;
-}
-
-static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
-{
- int err;
- unsigned char data;
- struct usb_device *dev = chip->dev;
- struct uac_clock_source_descriptor *cs_desc =
- snd_usb_find_clock_source(chip->ctrl_intf, source_id);
-
- if (!cs_desc)
- return 0;
-
- /* If a clock source can't tell us whether it's valid, we assume it is */
- if (!uac2_control_is_readable(cs_desc->bmControls, UAC2_CS_CONTROL_CLOCK_VALID))
- return 1;
-
- 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,
- snd_usb_ctrl_intf(chip) | (source_id << 8),
- &data, sizeof(data));
-
- if (err < 0) {
- snd_printk(KERN_WARNING "%s(): cannot get clock validity for id %d\n",
- __func__, source_id);
- return 0;
- }
-
- return !!data;
-}
-
-static int __uac_clock_find_source(struct snd_usb_audio *chip,
- int entity_id, unsigned long *visited)
-{
- struct uac_clock_source_descriptor *source;
- struct uac_clock_selector_descriptor *selector;
- struct uac_clock_multiplier_descriptor *multiplier;
-
- entity_id &= 0xff;
-
- if (test_and_set_bit(entity_id, visited)) {
- snd_printk(KERN_WARNING
- "%s(): recursive clock topology detected, id %d.\n",
- __func__, entity_id);
- return -EINVAL;
- }
-
- /* first, see if the ID we're looking for is a clock source already */
- source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
- if (source)
- return source->bClockID;
-
- selector = snd_usb_find_clock_selector(chip->ctrl_intf, entity_id);
- if (selector) {
- int ret;
-
- /* the entity ID we are looking for is a selector.
- * find out what it currently selects */
- ret = uac_clock_selector_get_val(chip, selector->bClockID);
- 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",
- __func__, selector->bClockID, ret);
-
- return -EINVAL;
- }
-
- 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(chip->ctrl_intf, entity_id);
- if (multiplier)
- return __uac_clock_find_source(chip, multiplier->bCSourceID,
- visited);
-
- return -EINVAL;
-}
-
-/*
- * 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, entity_id, visited);
-}
-
-static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
- struct usb_host_interface *alts,
- struct audioformat *fmt, int rate)
-{
- struct usb_device *dev = chip->dev;
- unsigned int ep;
- unsigned char data[3];
- int err, crate;
-
- 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))
- return 0;
-
- data[0] = rate;
- data[1] = rate >> 8;
- data[2] = rate >> 16;
- if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
- USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
- UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep,
- data, sizeof(data))) < 0) {
- snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
- dev->devnum, iface, fmt->altsetting, rate, ep);
- //return err; //just not return, otherwise, logitech camera mic,can't use 2013-10-23
- //printk("%s snd_usb_ctl_msg set rate err! \n", __FUNCTION__);
- //return 0;//dbg if application set the rate that usb audio support just return 0! 2013-10-23
- }
-
- if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
- USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN,
- UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep,
- data, sizeof(data))) < 0) {
- snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n",
- dev->devnum, iface, fmt->altsetting, ep);
- printk("%s snd_usb_ctl_msg get rate err!\n", __FUNCTION__);
- return 0; /* some devices don't support reading */
- }
-
- crate = data[0] | (data[1] << 8) | (data[2] << 16);
- printk("%s snd_usb_ctl_msg get rate 2 :%d!\n", __FUNCTION__, crate);
- if (crate != rate) {
- snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
- // runtime->rate = crate;
- }
-
- return 0;
-}
-
-static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
- struct usb_host_interface *alts,
- struct audioformat *fmt, int rate)
-{
- struct usb_device *dev = chip->dev;
- unsigned char data[4];
- int err, crate;
- 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;
- }
-
- data[0] = rate;
- data[1] = rate >> 8;
- data[2] = rate >> 16;
- 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,
- snd_usb_ctrl_intf(chip) | (clock << 8),
- data, sizeof(data))) < 0) {
- snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d (v2)\n",
- dev->devnum, iface, fmt->altsetting, rate);
- return err;
- }
-
- 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,
- snd_usb_ctrl_intf(chip) | (clock << 8),
- data, sizeof(data))) < 0) {
- snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n",
- dev->devnum, iface, fmt->altsetting);
- return err;
- }
-
- crate = data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
- if (crate != rate)
- snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
-
- return 0;
-}
-
-int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
- struct usb_host_interface *alts,
- struct audioformat *fmt, int rate)
-{
- struct usb_interface_descriptor *altsd = get_iface_desc(alts);
-
- switch (altsd->bInterfaceProtocol) {
- case UAC_VERSION_1:
- default:
- return set_sample_rate_v1(chip, iface, alts, fmt, rate);
-
- case UAC_VERSION_2:
- return set_sample_rate_v2(chip, iface, alts, fmt, rate);
- }
-}
-
generated by cgit (git 2.34.1) at 2025-06-06 08:42:14 +0000