cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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motu-proc.c (3311B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * motu-proc.c - a part of driver for MOTU FireWire series
      4 *
      5 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
      6 */
      7
      8#include "./motu.h"
      9
     10static const char *const clock_names[] = {
     11	[SND_MOTU_CLOCK_SOURCE_INTERNAL] = "Internal",
     12	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB] = "ADAT on Dsub-9pin interface",
     13	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT] = "ADAT on optical interface",
     14	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_A] = "ADAT on optical interface A",
     15	[SND_MOTU_CLOCK_SOURCE_ADAT_ON_OPT_B] = "ADAT on optical interface B",
     16	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT] = "S/PDIF on optical interface",
     17	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_A] = "S/PDIF on optical interface A",
     18	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_OPT_B] = "S/PDIF on optical interface B",
     19	[SND_MOTU_CLOCK_SOURCE_SPDIF_ON_COAX] = "S/PDIF on coaxial interface",
     20	[SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR] = "AESEBU on XLR interface",
     21	[SND_MOTU_CLOCK_SOURCE_WORD_ON_BNC] = "Word clock on BNC interface",
     22	[SND_MOTU_CLOCK_SOURCE_SPH] = "Source packet header",
     23	[SND_MOTU_CLOCK_SOURCE_UNKNOWN] = "Unknown",
     24};
     25
     26static void proc_read_clock(struct snd_info_entry *entry,
     27			    struct snd_info_buffer *buffer)
     28{
     29
     30	struct snd_motu *motu = entry->private_data;
     31	unsigned int rate;
     32	enum snd_motu_clock_source source;
     33
     34	if (snd_motu_protocol_get_clock_rate(motu, &rate) < 0)
     35		return;
     36	if (snd_motu_protocol_get_clock_source(motu, &source) < 0)
     37		return;
     38
     39	snd_iprintf(buffer, "Rate:\t%d\n", rate);
     40	snd_iprintf(buffer, "Source:\t%s\n", clock_names[source]);
     41}
     42
     43static void proc_read_format(struct snd_info_entry *entry,
     44			     struct snd_info_buffer *buffer)
     45{
     46	struct snd_motu *motu = entry->private_data;
     47	unsigned int mode;
     48	struct snd_motu_packet_format *formats;
     49	int i;
     50
     51	if (snd_motu_protocol_cache_packet_formats(motu) < 0)
     52		return;
     53
     54	snd_iprintf(buffer, "tx:\tmsg\tfixed\ttotal\n");
     55	for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
     56		mode = i >> 1;
     57
     58		formats = &motu->tx_packet_formats;
     59		snd_iprintf(buffer,
     60			    "%u:\t%u\t%u\t%u\n",
     61			    snd_motu_clock_rates[i],
     62			    formats->msg_chunks,
     63			    motu->spec->tx_fixed_pcm_chunks[mode],
     64			    formats->pcm_chunks[mode]);
     65	}
     66
     67	snd_iprintf(buffer, "rx:\tmsg\tfixed\ttotal\n");
     68	for (i = 0; i < SND_MOTU_CLOCK_RATE_COUNT; ++i) {
     69		mode = i >> 1;
     70
     71		formats = &motu->rx_packet_formats;
     72		snd_iprintf(buffer,
     73			    "%u:\t%u\t%u\t%u\n",
     74			    snd_motu_clock_rates[i],
     75			    formats->msg_chunks,
     76			    motu->spec->rx_fixed_pcm_chunks[mode],
     77			    formats->pcm_chunks[mode]);
     78	}
     79}
     80
     81static void add_node(struct snd_motu *motu, struct snd_info_entry *root,
     82		     const char *name,
     83		     void (*op)(struct snd_info_entry *e,
     84				struct snd_info_buffer *b))
     85{
     86	struct snd_info_entry *entry;
     87
     88	entry = snd_info_create_card_entry(motu->card, name, root);
     89	if (entry)
     90		snd_info_set_text_ops(entry, motu, op);
     91}
     92
     93void snd_motu_proc_init(struct snd_motu *motu)
     94{
     95	struct snd_info_entry *root;
     96
     97	/*
     98	 * All nodes are automatically removed at snd_card_disconnect(),
     99	 * by following to link list.
    100	 */
    101	root = snd_info_create_card_entry(motu->card, "firewire",
    102					  motu->card->proc_root);
    103	if (root == NULL)
    104		return;
    105	root->mode = S_IFDIR | 0555;
    106
    107	add_node(motu, root, "clock", proc_read_clock);
    108	add_node(motu, root, "format", proc_read_format);
    109}