1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 */
4
5#include <linux/init.h>
6#include <linux/usb.h>
7
8#include <sound/core.h>
9#include <sound/info.h>
10#include <sound/pcm.h>
11
12#include "usbaudio.h"
13#include "helper.h"
14#include "card.h"
15#include "endpoint.h"
16#include "proc.h"
17
18/* convert our full speed USB rate into sampling rate in Hz */
19static inline unsigned get_full_speed_hz(unsigned int usb_rate)
20{
21	return (usb_rate * 125 + (1 << 12)) >> 13;
22}
23
24/* convert our high speed USB rate into sampling rate in Hz */
25static inline unsigned get_high_speed_hz(unsigned int usb_rate)
26{
27	return (usb_rate * 125 + (1 << 9)) >> 10;
28}
29
30/*
31 * common proc files to show the usb device info
32 */
33static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
34{
35	struct snd_usb_audio *chip = entry->private_data;
36	if (!atomic_read(&chip->shutdown))
37		snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
38}
39
40static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
41{
42	struct snd_usb_audio *chip = entry->private_data;
43	if (!atomic_read(&chip->shutdown))
44		snd_iprintf(buffer, "%04x:%04x\n",
45			    USB_ID_VENDOR(chip->usb_id),
46			    USB_ID_PRODUCT(chip->usb_id));
47}
48
49void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
50{
51	snd_card_ro_proc_new(chip->card, "usbbus", chip,
52			     proc_audio_usbbus_read);
53	snd_card_ro_proc_new(chip->card, "usbid", chip,
54			     proc_audio_usbid_read);
55}
56
57static const char * const channel_labels[] = {
58	[SNDRV_CHMAP_NA]	= "N/A",
59	[SNDRV_CHMAP_MONO]	= "MONO",
60	[SNDRV_CHMAP_FL]	= "FL",
61	[SNDRV_CHMAP_FR]	= "FR",
62	[SNDRV_CHMAP_FC]	= "FC",
63	[SNDRV_CHMAP_LFE]	= "LFE",
64	[SNDRV_CHMAP_RL]	= "RL",
65	[SNDRV_CHMAP_RR]	= "RR",
66	[SNDRV_CHMAP_FLC]	= "FLC",
67	[SNDRV_CHMAP_FRC]	= "FRC",
68	[SNDRV_CHMAP_RC]	= "RC",
69	[SNDRV_CHMAP_SL]	= "SL",
70	[SNDRV_CHMAP_SR]	= "SR",
71	[SNDRV_CHMAP_TC]	= "TC",
72	[SNDRV_CHMAP_TFL]	= "TFL",
73	[SNDRV_CHMAP_TFC]	= "TFC",
74	[SNDRV_CHMAP_TFR]	= "TFR",
75	[SNDRV_CHMAP_TRL]	= "TRL",
76	[SNDRV_CHMAP_TRC]	= "TRC",
77	[SNDRV_CHMAP_TRR]	= "TRR",
78	[SNDRV_CHMAP_TFLC]	= "TFLC",
79	[SNDRV_CHMAP_TFRC]	= "TFRC",
80	[SNDRV_CHMAP_LLFE]	= "LLFE",
81	[SNDRV_CHMAP_RLFE]	= "RLFE",
82	[SNDRV_CHMAP_TSL]	= "TSL",
83	[SNDRV_CHMAP_TSR]	= "TSR",
84	[SNDRV_CHMAP_BC]	= "BC",
85	[SNDRV_CHMAP_RLC]	= "RLC",
86	[SNDRV_CHMAP_RRC]	= "RRC",
87};
88
89/*
90 * proc interface for list the supported pcm formats
91 */
92static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
93{
94	struct audioformat *fp;
95	static const char * const sync_types[4] = {
96		"NONE", "ASYNC", "ADAPTIVE", "SYNC"
97	};
98
99	list_for_each_entry(fp, &subs->fmt_list, list) {
100		snd_pcm_format_t fmt;
101
102		snd_iprintf(buffer, "  Interface %d\n", fp->iface);
103		snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
104		snd_iprintf(buffer, "    Format:");
105		pcm_for_each_format(fmt)
106			if (fp->formats & pcm_format_to_bits(fmt))
107				snd_iprintf(buffer, " %s",
108					    snd_pcm_format_name(fmt));
109		snd_iprintf(buffer, "\n");
110		snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
111		snd_iprintf(buffer, "    Endpoint: 0x%02x (%d %s) (%s)\n",
112			    fp->endpoint,
113			    fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
114			    fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
115			    sync_types[(fp->ep_attr & USB_ENDPOINT_SYNCTYPE) >> 2]);
116		if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
117			snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
118				    fp->rate_min, fp->rate_max);
119		} else {
120			unsigned int i;
121			snd_iprintf(buffer, "    Rates: ");
122			for (i = 0; i < fp->nr_rates; i++) {
123				if (i > 0)
124					snd_iprintf(buffer, ", ");
125				snd_iprintf(buffer, "%d", fp->rate_table[i]);
126			}
127			snd_iprintf(buffer, "\n");
128		}
129		if (subs->speed != USB_SPEED_FULL)
130			snd_iprintf(buffer, "    Data packet interval: %d us\n",
131				    125 * (1 << fp->datainterval));
132		snd_iprintf(buffer, "    Bits: %d\n", fp->fmt_bits);
133
134		if (fp->dsd_raw)
135			snd_iprintf(buffer, "    DSD raw: DOP=%d, bitrev=%d\n",
136				    fp->dsd_dop, fp->dsd_bitrev);
137
138		if (fp->chmap) {
139			const struct snd_pcm_chmap_elem *map = fp->chmap;
140			int c;
141
142			snd_iprintf(buffer, "    Channel map:");
143			for (c = 0; c < map->channels; c++) {
144				if (map->map[c] >= ARRAY_SIZE(channel_labels) ||
145				    !channel_labels[map->map[c]])
146					snd_iprintf(buffer, " --");
147				else
148					snd_iprintf(buffer, " %s",
149						    channel_labels[map->map[c]]);
150			}
151			snd_iprintf(buffer, "\n");
152		}
153
154		if (fp->sync_ep) {
155			snd_iprintf(buffer, "    Sync Endpoint: 0x%02x (%d %s)\n",
156				    fp->sync_ep,
157				    fp->sync_ep & USB_ENDPOINT_NUMBER_MASK,
158				    fp->sync_ep & USB_DIR_IN ? "IN" : "OUT");
159			snd_iprintf(buffer, "    Sync EP Interface: %d\n",
160				    fp->sync_iface);
161			snd_iprintf(buffer, "    Sync EP Altset: %d\n",
162				    fp->sync_altsetting);
163			snd_iprintf(buffer, "    Implicit Feedback Mode: %s\n",
164				    fp->implicit_fb ? "Yes" : "No");
165		}
166
167		// snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
168		// snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);
169	}
170}
171
172static void proc_dump_ep_status(struct snd_usb_substream *subs,
173				struct snd_usb_endpoint *data_ep,
174				struct snd_usb_endpoint *sync_ep,
175				struct snd_info_buffer *buffer)
176{
177	if (!data_ep)
178		return;
179	snd_iprintf(buffer, "    Packet Size = %d\n", data_ep->curpacksize);
180	snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
181		    subs->speed == USB_SPEED_FULL
182		    ? get_full_speed_hz(data_ep->freqm)
183		    : get_high_speed_hz(data_ep->freqm),
184		    data_ep->freqm >> 16, data_ep->freqm & 0xffff);
185	if (sync_ep && data_ep->freqshift != INT_MIN) {
186		int res = 16 - data_ep->freqshift;
187		snd_iprintf(buffer, "    Feedback Format = %d.%d\n",
188			    (sync_ep->syncmaxsize > 3 ? 32 : 24) - res, res);
189	}
190}
191
192static void proc_dump_substream_status(struct snd_usb_audio *chip,
193				       struct snd_usb_substream *subs,
194				       struct snd_info_buffer *buffer)
195{
196	mutex_lock(&chip->mutex);
197	if (subs->running) {
198		snd_iprintf(buffer, "  Status: Running\n");
199		if (subs->cur_audiofmt) {
200			snd_iprintf(buffer, "    Interface = %d\n", subs->cur_audiofmt->iface);
201			snd_iprintf(buffer, "    Altset = %d\n", subs->cur_audiofmt->altsetting);
202		}
203		proc_dump_ep_status(subs, subs->data_endpoint, subs->sync_endpoint, buffer);
204	} else {
205		snd_iprintf(buffer, "  Status: Stop\n");
206	}
207	mutex_unlock(&chip->mutex);
208}
209
210static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
211{
212	struct snd_usb_stream *stream = entry->private_data;
213	struct snd_usb_audio *chip = stream->chip;
214
215	snd_iprintf(buffer, "%s : %s\n", chip->card->longname, stream->pcm->name);
216
217	if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
218		snd_iprintf(buffer, "\nPlayback:\n");
219		proc_dump_substream_status(chip, &stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
220		proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
221	}
222	if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
223		snd_iprintf(buffer, "\nCapture:\n");
224		proc_dump_substream_status(chip, &stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
225		proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
226	}
227}
228
229void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream)
230{
231	char name[32];
232	struct snd_card *card = stream->chip->card;
233
234	sprintf(name, "stream%d", stream->pcm_index);
235	snd_card_ro_proc_new(card, name, stream, proc_pcm_format_read);
236}
237
238