return le32_to_cpu(data);
}
+/*
+ * Try to set the given sample rate:
+ *
+ * Return 0 if the clock source is read-only, the actual rate on success,
+ * or a negative error code.
+ *
+ * This function gets called from format.c to validate each sample rate, too.
+ * Hence no message is shown upon error
+ */
+int snd_usb_set_sample_rate_v2v3(struct snd_usb_audio *chip,
+ const struct audioformat *fmt,
+ int clock, int rate)
+{
+ bool writeable;
+ u32 bmControls;
+ __le32 data;
+ int err;
+
+ if (fmt->protocol == UAC_VERSION_3) {
+ struct uac3_clock_source_descriptor *cs_desc;
+
+ cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, clock);
+ bmControls = le32_to_cpu(cs_desc->bmControls);
+ } else {
+ struct uac_clock_source_descriptor *cs_desc;
+
+ cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, clock);
+ bmControls = cs_desc->bmControls;
+ }
+
+ writeable = uac_v2v3_control_is_writeable(bmControls,
+ UAC2_CS_CONTROL_SAM_FREQ);
+ if (!writeable)
+ return 0;
+
+ data = cpu_to_le32(rate);
+ err = snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->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));
+ if (err < 0)
+ return err;
+
+ return get_sample_rate_v2v3(chip, fmt->iface, fmt->altsetting, clock);
+}
+
static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface,
- struct usb_host_interface *alts,
- struct audioformat *fmt, int rate)
+ struct usb_host_interface *alts,
+ struct audioformat *fmt, int rate)
{
struct usb_device *dev = chip->dev;
- __le32 data;
- int err, cur_rate, prev_rate;
+ int cur_rate, prev_rate;
int clock;
- bool writeable;
- u32 bmControls;
/* First, try to find a valid clock. This may trigger
* automatic clock selection if the current clock is not
if (prev_rate == rate)
goto validation;
- if (fmt->protocol == UAC_VERSION_3) {
- struct uac3_clock_source_descriptor *cs_desc;
-
- cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, clock);
- bmControls = le32_to_cpu(cs_desc->bmControls);
- } else {
- struct uac_clock_source_descriptor *cs_desc;
-
- cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, clock);
- bmControls = cs_desc->bmControls;
+ cur_rate = snd_usb_set_sample_rate_v2v3(chip, fmt, clock, rate);
+ if (cur_rate < 0) {
+ usb_audio_err(chip,
+ "%d:%d: cannot set freq %d (v2/v3): err %d\n",
+ iface, fmt->altsetting, rate, cur_rate);
+ return cur_rate;
}
- writeable = uac_v2v3_control_is_writeable(bmControls,
- UAC2_CS_CONTROL_SAM_FREQ);
- if (writeable) {
- data = cpu_to_le32(rate);
- 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));
- if (err < 0) {
- usb_audio_err(chip,
- "%d:%d: cannot set freq %d (v2/v3): err %d\n",
- iface, fmt->altsetting, rate, err);
- return err;
- }
-
- cur_rate = get_sample_rate_v2v3(chip, iface,
- fmt->altsetting, clock);
- } else {
+ if (!cur_rate)
cur_rate = prev_rate;
- }
if (cur_rate != rate) {
- if (!writeable) {
- usb_audio_warn(chip,
- "%d:%d: freq mismatch (RO clock): req %d, clock runs @%d\n",
- iface, fmt->altsetting, rate, cur_rate);
- return -ENXIO;
- }
- usb_audio_dbg(chip,
- "current rate %d is different from the runtime rate %d\n",
- cur_rate, rate);
+ usb_audio_warn(chip,
+ "%d:%d: freq mismatch (RO clock): req %d, clock runs @%d\n",
+ fmt->iface, fmt->altsetting, rate, cur_rate);
+ return -ENXIO;
}
/* Some devices doesn't respond to sample rate changes while the
return -ENODEV;
}
+/* check whether the given altsetting is supported for the already set rate */
+static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
+ int altsetting)
+{
+ struct usb_device *dev = chip->dev;
+ __le64 raw_data = 0;
+ u64 data;
+ int err;
+
+ /* we assume 64bit is enough for any altsettings */
+ if (snd_BUG_ON(altsetting >= 64 - 8))
+ return false;
+
+ err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
+ UAC2_AS_VAL_ALT_SETTINGS << 8,
+ iface, &raw_data, sizeof(raw_data));
+ if (err < 0)
+ return false;
+
+ data = le64_to_cpu(raw_data);
+ /* first byte contains the bitmap size */
+ if ((data & 0xff) * 8 < altsetting)
+ return false;
+ if (data & (1ULL << (altsetting + 8)))
+ return true;
+
+ return false;
+}
+
+/*
+ * Validate each sample rate with the altsetting
+ * Rebuild the rate table if only partial values are valid
+ */
+static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
+ struct audioformat *fp,
+ int clock)
+{
+ struct usb_device *dev = chip->dev;
+ unsigned int *table;
+ unsigned int nr_rates;
+ unsigned int rate_min = 0x7fffffff;
+ unsigned int rate_max = 0;
+ unsigned int rates = 0;
+ int i, err;
+
+ table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
+ if (!table)
+ return -ENOMEM;
+
+ /* clear the interface altsetting at first */
+ usb_set_interface(dev, fp->iface, 0);
+
+ nr_rates = 0;
+ for (i = 0; i < fp->nr_rates; i++) {
+ err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
+ fp->rate_table[i]);
+ if (err < 0)
+ continue;
+
+ if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting)) {
+ table[nr_rates++] = fp->rate_table[i];
+ if (rate_min > fp->rate_table[i])
+ rate_min = fp->rate_table[i];
+ if (rate_max < fp->rate_table[i])
+ rate_max = fp->rate_table[i];
+ rates |= snd_pcm_rate_to_rate_bit(fp->rate_table[i]);
+ }
+ }
+
+ if (!nr_rates) {
+ usb_audio_dbg(chip,
+ "No valid sample rate available for %d:%d, assuming a firmware bug\n",
+ fp->iface, fp->altsetting);
+ nr_rates = fp->nr_rates; /* continue as is */
+ }
+
+ if (fp->nr_rates == nr_rates) {
+ kfree(table);
+ return 0;
+ }
+
+ kfree(fp->rate_table);
+ fp->rate_table = table;
+ fp->nr_rates = nr_rates;
+ fp->rate_min = rate_min;
+ fp->rate_max = rate_max;
+ fp->rates = rates;
+ return 0;
+}
+
/*
* parse the format descriptor and stores the possible sample rates
* on the audioformat table (audio class v2 and v3).
* allocated, so the rates will be stored */
parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
+ ret = validate_sample_rate_table_v2v3(chip, fp, clock);
+
err_free:
kfree(data);
err:
projects / nvme.git / commitdiff