summaryrefslogtreecommitdiffstats
path: root/sound/usb/proc.c
blob: 4174ad11fca64217e82ff8d4ffe7ad68db9104ec (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 */

#include <linux/init.h>
#include <linux/usb.h>

#include <sound/core.h>
#include <sound/info.h>
#include <sound/pcm.h>

#include "usbaudio.h"
#include "helper.h"
#include "card.h"
#include "endpoint.h"
#include "proc.h"

/* convert our full speed USB rate into sampling rate in Hz */
static inline unsigned get_full_speed_hz(unsigned int usb_rate)
{
	return (usb_rate * 125 + (1 << 12)) >> 13;
}

/* convert our high speed USB rate into sampling rate in Hz */
static inline unsigned get_high_speed_hz(unsigned int usb_rate)
{
	return (usb_rate * 125 + (1 << 9)) >> 10;
}

/*
 * common proc files to show the usb device info
 */
static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
	struct snd_usb_audio *chip = entry->private_data;
	if (!atomic_read(&chip->shutdown))
		snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
}

static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
	struct snd_usb_audio *chip = entry->private_data;
	if (!atomic_read(&chip->shutdown))
		snd_iprintf(buffer, "%04x:%04x\n", 
			    USB_ID_VENDOR(chip->usb_id),
			    USB_ID_PRODUCT(chip->usb_id));
}

void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
{
	snd_card_ro_proc_new(chip->card, "usbbus", chip,
			     proc_audio_usbbus_read);
	snd_card_ro_proc_new(chip->card, "usbid", chip,
			     proc_audio_usbid_read);
}

/*
 * proc interface for list the supported pcm formats
 */
static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
{
	struct audioformat *fp;
	static const char * const sync_types[4] = {
		"NONE", "ASYNC", "ADAPTIVE", "SYNC"
	};

	list_for_each_entry(fp, &subs->fmt_list, list) {
		snd_pcm_format_t fmt;

		snd_iprintf(buffer, "  Interface %d\n", fp->iface);
		snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
		snd_iprintf(buffer, "    Format:");
		pcm_for_each_format(fmt)
			if (fp->formats & pcm_format_to_bits(fmt))
				snd_iprintf(buffer, " %s",
					    snd_pcm_format_name(fmt));
		snd_iprintf(buffer, "\n");
		snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
		snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
			    fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
			    fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
			    sync_types[(fp->ep_attr & USB_ENDPOINT_SYNCTYPE) >> 2]);
		if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
			snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
				    fp->rate_min, fp->rate_max);
		} else {
			unsigned int i;
			snd_iprintf(buffer, "    Rates: ");
			for (i = 0; i < fp->nr_rates; i++) {
				if (i > 0)
					snd_iprintf(buffer, ", ");
				snd_iprintf(buffer, "%d", fp->rate_table[i]);
			}
			snd_iprintf(buffer, "\n");
		}
		if (subs->speed != USB_SPEED_FULL)
			snd_iprintf(buffer, "    Data packet interval: %d us\n",
				    125 * (1 << fp->datainterval));
		snd_iprintf(buffer, "    Bits: %d\n", fp->fmt_bits);
		// snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
		// snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);
	}
}

static void proc_dump_ep_status(struct snd_usb_substream *subs,
				struct snd_usb_endpoint *data_ep,
				struct snd_usb_endpoint *sync_ep,
				struct snd_info_buffer *buffer)
{
	if (!data_ep)
		return;
	snd_iprintf(buffer, "    Packet Size = %d\n", data_ep->curpacksize);
	snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
		    subs->speed == USB_SPEED_FULL
		    ? get_full_speed_hz(data_ep->freqm)
		    : get_high_speed_hz(data_ep->freqm),
		    data_ep->freqm >> 16, data_ep->freqm & 0xffff);
	if (sync_ep && data_ep->freqshift != INT_MIN) {
		int res = 16 - data_ep->freqshift;
		snd_iprintf(buffer, "    Feedback Format = %d.%d\n",
			    (sync_ep->syncmaxsize > 3 ? 32 : 24) - res, res);
	}
}

static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
{
	if (subs->running) {
		snd_iprintf(buffer, "  Status: Running\n");
		snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
		snd_iprintf(buffer, "    Altset = %d\n", subs->altset_idx);
		proc_dump_ep_status(subs, subs->data_endpoint, subs->sync_endpoint, buffer);
	} else {
		snd_iprintf(buffer, "  Status: Stop\n");
	}
}

static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
	struct snd_usb_stream *stream = entry->private_data;

	snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);

	if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
		snd_iprintf(buffer, "\nPlayback:\n");
		proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
		proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
	}
	if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
		snd_iprintf(buffer, "\nCapture:\n");
		proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
		proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
	}
}

void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream)
{
	char name[32];
	struct snd_card *card = stream->chip->card;

	sprintf(name, "stream%d", stream->pcm_index);
	snd_card_ro_proc_new(card, name, stream, proc_pcm_format_read);
}