xref: /openbmc/linux/sound/usb/proc.c (revision 8ec08b1a)
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 */
get_full_speed_hz(unsigned int usb_rate)19 static 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 */
get_high_speed_hz(unsigned int usb_rate)25 static 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  */
proc_audio_usbbus_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)33 static 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 
proc_audio_usbid_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)40 static 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 
snd_usb_audio_create_proc(struct snd_usb_audio * chip)49 void 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 
57 static 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  */
proc_dump_substream_formats(struct snd_usb_substream * subs,struct snd_info_buffer * buffer)92 static 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 
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)172 static 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 
proc_dump_substream_status(struct snd_usb_audio * chip,struct snd_usb_substream * subs,struct snd_info_buffer * buffer)192 static 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 
proc_pcm_format_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)210 static 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 
snd_usb_proc_pcm_format_add(struct snd_usb_stream * stream)229 void 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