Merge branch 'topic/usb-audio' into for-linus

sound/usb/usbaudio.c

@@ -121,6 +121,7 @@ struct audioformat {
 	unsigned char attributes;	/* corresponding attributes of cs endpoint */
 	unsigned char endpoint;		/* endpoint */
 	unsigned char ep_attr;		/* endpoint attributes */
+	unsigned char datainterval;	/* log_2 of data packet interval */
 	unsigned int maxpacksize;	/* max. packet size */
 	unsigned int rates;		/* rate bitmasks */
 	unsigned int rate_min, rate_max;	/* min/max rates */
@@ -170,7 +171,6 @@ struct snd_usb_substream {
 	unsigned int curframesize;	/* current packet size in frames (for capture) */
 	unsigned int fill_max: 1;	/* fill max packet size always */
 	unsigned int fmt_type;		/* USB audio format type (1-3) */
-	unsigned int packs_per_ms;	/* packets per millisecond (for playback) */
 
 	unsigned int running: 1;	/* running status */
 
@@ -607,9 +607,7 @@ static int prepare_playback_urb(struct snd_usb_substream *subs,
 				break;
 			}
  		}
-		/* finish at the frame boundary at/after the period boundary */
-		if (period_elapsed &&
-		    (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
+		if (period_elapsed) /* finish at the period boundary */
 			break;
 	}
 	if (subs->hwptr_done + offs > runtime->buffer_size) {
@@ -1067,7 +1065,6 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 		packs_per_ms = 8 >> subs->datainterval;
 	else
 		packs_per_ms = 1;
-	subs->packs_per_ms = packs_per_ms;
 
 	if (is_playback) {
 		urb_packs = max(nrpacks, 1);
@@ -1087,18 +1084,17 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 			minsize -= minsize >> 3;
 		minsize = max(minsize, 1u);
 		total_packs = (period_bytes + minsize - 1) / minsize;
-		/* round up to multiple of packs_per_ms */
-		total_packs = (total_packs + packs_per_ms - 1)
-				& ~(packs_per_ms - 1);
 		/* we need at least two URBs for queueing */
-		if (total_packs < 2 * packs_per_ms) {
-			total_packs = 2 * packs_per_ms;
+		if (total_packs < 2) {
+			total_packs = 2;
 		} else {
 			/* and we don't want too long a queue either */
 			maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
 			total_packs = min(total_packs, maxpacks);
 		}
 	} else {
+		while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
+			urb_packs >>= 1;
 		total_packs = MAX_URBS * urb_packs;
 	}
 	subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
@@ -1350,12 +1346,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 		subs->datapipe = usb_sndisocpipe(dev, ep);
 	else
 		subs->datapipe = usb_rcvisocpipe(dev, ep);
-	if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
-	    get_endpoint(alts, 0)->bInterval >= 1 &&
-	    get_endpoint(alts, 0)->bInterval <= 4)
-		subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
-	else
-		subs->datainterval = 0;
+	subs->datainterval = fmt->datainterval;
 	subs->syncpipe = subs->syncinterval = 0;
 	subs->maxpacksize = fmt->maxpacksize;
 	subs->fill_max = 0;
@@ -1568,11 +1559,15 @@ static struct snd_pcm_hardware snd_usb_hardware =
 #define hwc_debug(fmt, args...) /**/
 #endif
 
-static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
+static int hw_check_valid_format(struct snd_usb_substream *subs,
+				 struct snd_pcm_hw_params *params,
+				 struct audioformat *fp)
 {
 	struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 	struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 	struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
+	unsigned int ptime;
 
 	/* check the format */
 	if (!snd_mask_test(fmts, fp->format)) {
@@ -1593,6 +1588,14 @@ static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audiof
 		hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
 		return 0;
 	}
+	/* check whether the period time is >= the data packet interval */
+	if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
+		ptime = 125 * (1 << fp->datainterval);
+		if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
+			hwc_debug("   > check: ptime %u > max %u\n", ptime, pt->max);
+			return 0;
+		}
+	}
 	return 1;
 }
 
@@ -1611,7 +1614,7 @@ static int hw_rule_rate(struct snd_pcm_hw_params *params,
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
 		fp = list_entry(p, struct audioformat, list);
-		if (!hw_check_valid_format(params, fp))
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
 		if (changed++) {
 			if (rmin > fp->rate_min)
@@ -1665,7 +1668,7 @@ static int hw_rule_channels(struct snd_pcm_hw_params *params,
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
 		fp = list_entry(p, struct audioformat, list);
-		if (!hw_check_valid_format(params, fp))
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
 		if (changed++) {
 			if (rmin > fp->channels)
@@ -1718,7 +1721,7 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
 		fp = list_entry(p, struct audioformat, list);
-		if (!hw_check_valid_format(params, fp))
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
 		fbits |= (1ULL << fp->format);
 	}
@@ -1736,95 +1739,42 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
 	return changed;
 }
 
-#define MAX_MASK	64
-
-/*
- * check whether the registered audio formats need special hw-constraints
- */
-static int check_hw_params_convention(struct snd_usb_substream *subs)
+static int hw_rule_period_time(struct snd_pcm_hw_params *params,
+			       struct snd_pcm_hw_rule *rule)
 {
-	int i;
-	u32 *channels;
-	u32 *rates;
-	u32 cmaster, rmaster;
-	u32 rate_min = 0, rate_max = 0;
-	struct list_head *p;
-	int err = 1;
-
-	channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
-	rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
-	if (!channels || !rates) {
-		err = -ENOMEM;
-		goto __out;
-	}
+	struct snd_usb_substream *subs = rule->private;
+	struct audioformat *fp;
+	struct snd_interval *it;
+	unsigned char min_datainterval;
+	unsigned int pmin;
+	int changed;
 
-	list_for_each(p, &subs->fmt_list) {
-		struct audioformat *f;
-		f = list_entry(p, struct audioformat, list);
-		/* unconventional channels? */
-		if (f->channels > 32)
-			goto __out;
-		/* continuous rate min/max matches? */
-		if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
-			if (rate_min && f->rate_min != rate_min)
-				goto __out;
-			if (rate_max && f->rate_max != rate_max)
-				goto __out;
-			rate_min = f->rate_min;
-			rate_max = f->rate_max;
-		}
-		/* combination of continuous rates and fixed rates? */
-		if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
-			if (f->rates != rates[f->format])
-				goto __out;
-		}
-		if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
-			if (rates[f->format] && rates[f->format] != f->rates)
-				goto __out;
-		}
-		channels[f->format] |= 1 << (f->channels - 1);
-		rates[f->format] |= f->rates;
-		/* needs knot? */
-		if (f->rates & SNDRV_PCM_RATE_KNOT)
-			goto __out;
-	}
-	/* check whether channels and rates match for all formats */
-	cmaster = rmaster = 0;
-	for (i = 0; i < MAX_MASK; i++) {
-		if (cmaster != channels[i] && cmaster && channels[i])
-			goto __out;
-		if (rmaster != rates[i] && rmaster && rates[i])
-			goto __out;
-		if (channels[i])
-			cmaster = channels[i];
-		if (rates[i])
-			rmaster = rates[i];
-	}
-	/* check whether channels match for all distinct rates */
-	memset(channels, 0, MAX_MASK * sizeof(u32));
-	list_for_each(p, &subs->fmt_list) {
-		struct audioformat *f;
-		f = list_entry(p, struct audioformat, list);
-		if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
+	it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
+	hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
+	min_datainterval = 0xff;
+	list_for_each_entry(fp, &subs->fmt_list, list) {
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
-		for (i = 0; i < 32; i++) {
-			if (f->rates & (1 << i))
-				channels[i] |= 1 << (f->channels - 1);
-		}
+		min_datainterval = min(min_datainterval, fp->datainterval);
 	}
-	cmaster = 0;
-	for (i = 0; i < 32; i++) {
-		if (cmaster != channels[i] && cmaster && channels[i])
-			goto __out;
-		if (channels[i])
-			cmaster = channels[i];
+	if (min_datainterval == 0xff) {
+		hwc_debug("  --> get emtpy\n");
+		it->empty = 1;
+		return -EINVAL;
 	}
-	err = 0;
-
- __out:
-	kfree(channels);
-	kfree(rates);
-	return err;
+	pmin = 125 * (1 << min_datainterval);
+	changed = 0;
+	if (it->min < pmin) {
+		it->min = pmin;
+		it->openmin = 0;
+		changed = 1;
+	}
+	if (snd_interval_checkempty(it)) {
+		it->empty = 1;
+		return -EINVAL;
+	}
+	hwc_debug("  --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
+	return changed;
 }
 
 /*
@@ -1872,6 +1822,8 @@ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
 {
 	struct list_head *p;
+	unsigned int pt, ptmin;
+	int param_period_time_if_needed;
 	int err;
 
 	runtime->hw.formats = subs->formats;
@@ -1881,6 +1833,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
 	runtime->hw.channels_min = 256;
 	runtime->hw.channels_max = 0;
 	runtime->hw.rates = 0;
+	ptmin = UINT_MAX;
 	/* check min/max rates and channels */
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
@@ -1899,42 +1852,54 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
 			runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
 				fp->frame_size;
 		}
+		pt = 125 * (1 << fp->datainterval);
+		ptmin = min(ptmin, pt);
 	}
 
-	/* set the period time minimum 1ms */
-	/* FIXME: high-speed mode allows 125us minimum period, but many parts
-	 * in the current code assume the 1ms period.
-	 */
+	param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
+	if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
+		/* full speed devices have fixed data packet interval */
+		ptmin = 1000;
+	if (ptmin == 1000)
+		/* if period time doesn't go below 1 ms, no rules needed */
+		param_period_time_if_needed = -1;
 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
-				     1000,
-				     /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
-
-	err = check_hw_params_convention(subs);
-	if (err < 0)
+				     ptmin, UINT_MAX);
+
+	if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				       hw_rule_rate, subs,
+				       SNDRV_PCM_HW_PARAM_FORMAT,
+				       SNDRV_PCM_HW_PARAM_CHANNELS,
+				       param_period_time_if_needed,
+				       -1)) < 0)
 		return err;
-	else if (err) {
-		hwc_debug("setting extra hw constraints...\n");
-		if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
-					       hw_rule_rate, subs,
-					       SNDRV_PCM_HW_PARAM_FORMAT,
-					       SNDRV_PCM_HW_PARAM_CHANNELS,
-					       -1)) < 0)
-			return err;
-		if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
-					       hw_rule_channels, subs,
-					       SNDRV_PCM_HW_PARAM_FORMAT,
-					       SNDRV_PCM_HW_PARAM_RATE,
-					       -1)) < 0)
-			return err;
-		if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
-					       hw_rule_format, subs,
-					       SNDRV_PCM_HW_PARAM_RATE,
-					       SNDRV_PCM_HW_PARAM_CHANNELS,
-					       -1)) < 0)
-			return err;
-		if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
+	if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				       hw_rule_channels, subs,
+				       SNDRV_PCM_HW_PARAM_FORMAT,
+				       SNDRV_PCM_HW_PARAM_RATE,
+				       param_period_time_if_needed,
+				       -1)) < 0)
+		return err;
+	if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
+				       hw_rule_format, subs,
+				       SNDRV_PCM_HW_PARAM_RATE,
+				       SNDRV_PCM_HW_PARAM_CHANNELS,
+				       param_period_time_if_needed,
+				       -1)) < 0)
+		return err;
+	if (param_period_time_if_needed >= 0) {
+		err = snd_pcm_hw_rule_add(runtime, 0,
+					  SNDRV_PCM_HW_PARAM_PERIOD_TIME,
+					  hw_rule_period_time, subs,
+					  SNDRV_PCM_HW_PARAM_FORMAT,
+					  SNDRV_PCM_HW_PARAM_CHANNELS,
+					  SNDRV_PCM_HW_PARAM_RATE,
+					  -1);
+		if (err < 0)
 			return err;
 	}
+	if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
+		return err;
 	return 0;
 }
 
@@ -2147,7 +2112,8 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
 		fp = list_entry(p, struct audioformat, list);
 		snd_iprintf(buffer, "  Interface %d\n", fp->iface);
 		snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
-		snd_iprintf(buffer, "    Format: %#x\n", fp->format);
+		snd_iprintf(buffer, "    Format: %#x (%d bits)\n",
+			    fp->format, snd_pcm_format_width(fp->format));
 		snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
 		snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
 			    fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
@@ -2166,6 +2132,9 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
 			}
 			snd_iprintf(buffer, "\n");
 		}
+		if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
+			snd_iprintf(buffer, "    Data packet interval: %d us\n",
+				    125 * (1 << fp->datainterval));
 		// snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
 		// snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);
 	}
@@ -2659,6 +2628,17 @@ static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp
 	return 0;
 }
 
+static unsigned char parse_datainterval(struct snd_usb_audio *chip,
+					struct usb_host_interface *alts)
+{
+	if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH &&
+	    get_endpoint(alts, 0)->bInterval >= 1 &&
+	    get_endpoint(alts, 0)->bInterval <= 4)
+		return get_endpoint(alts, 0)->bInterval - 1;
+	else
+		return 0;
+}
+
 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
 					 int iface, int altno);
 static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
@@ -2764,6 +2744,7 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
 		fp->altset_idx = i;
 		fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 		fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+		fp->datainterval = parse_datainterval(chip, alts);
 		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 		if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
 			fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
@@ -2955,6 +2936,7 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
 		return -EINVAL;
 	}
 	alts = &iface->altsetting[fp->altset_idx];
+	fp->datainterval = parse_datainterval(chip, alts);
 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 	usb_set_interface(chip->dev, fp->iface, 0);
 	init_usb_pitch(chip->dev, fp->iface, alts, fp);
@@ -3049,6 +3031,7 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip,
 	fp->iface = altsd->bInterfaceNumber;
 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->datainterval = 0;
 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 
 	switch (fp->maxpacksize) {
@@ -3116,6 +3099,7 @@ static int create_ua1000_quirk(struct snd_usb_audio *chip,
 	fp->iface = altsd->bInterfaceNumber;
 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->datainterval = parse_datainterval(chip, alts);
 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 	fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
 
@@ -3168,6 +3152,7 @@ static int create_ua101_quirk(struct snd_usb_audio *chip,
 	fp->iface = altsd->bInterfaceNumber;
 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->datainterval = parse_datainterval(chip, alts);
 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 	fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);