root/sound/firewire/dice/dice-proc.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * dice_proc.c - a part of driver for Dice based devices
 *
 * Copyright (c) Clemens Ladisch
 * Copyright (c) 2014 Takashi Sakamoto
 */

#include "dice.h"

static int dice_proc_read_mem(struct snd_dice *dice, void *buffer,
                              unsigned int offset_q, unsigned int quadlets)
{
        unsigned int i;
        int err;

        err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST,
                                 DICE_PRIVATE_SPACE + 4 * offset_q,
                                 buffer, 4 * quadlets, 0);
        if (err < 0)
                return err;

        for (i = 0; i < quadlets; ++i)
                be32_to_cpus(&((u32 *)buffer)[i]);

        return 0;
}

static const char *str_from_array(const char *const strs[], unsigned int count,
                                  unsigned int i)
{
        if (i < count)
                return strs[i];

        return "(unknown)";
}

static void dice_proc_fixup_string(char *s, unsigned int size)
{
        unsigned int i;

        for (i = 0; i < size; i += 4)
                cpu_to_le32s((u32 *)(s + i));

        for (i = 0; i < size - 2; ++i) {
                if (s[i] == '\0')
                        return;
                if (s[i] == '\\' && s[i + 1] == '\\') {
                        s[i + 2] = '\0';
                        return;
                }
        }
        s[size - 1] = '\0';
}

static void dice_proc_read(struct snd_info_entry *entry,
                           struct snd_info_buffer *buffer)
{
        static const char *const section_names[5] = {
                "global", "tx", "rx", "ext_sync", "unused2"
        };
        static const char *const clock_sources[] = {
                "aes1", "aes2", "aes3", "aes4", "aes", "adat", "tdif",
                "wc", "arx1", "arx2", "arx3", "arx4", "internal"
        };
        static const char *const rates[] = {
                "32000", "44100", "48000", "88200", "96000", "176400", "192000",
                "any low", "any mid", "any high", "none"
        };
        struct snd_dice *dice = entry->private_data;
        u32 sections[ARRAY_SIZE(section_names) * 2];
        struct {
                u32 number;
                u32 size;
        } tx_rx_header;
        union {
                struct {
                        u32 owner_hi, owner_lo;
                        u32 notification;
                        char nick_name[NICK_NAME_SIZE];
                        u32 clock_select;
                        u32 enable;
                        u32 status;
                        u32 extended_status;
                        u32 sample_rate;
                        u32 version;
                        u32 clock_caps;
                        char clock_source_names[CLOCK_SOURCE_NAMES_SIZE];
                } global;
                struct {
                        u32 iso;
                        u32 number_audio;
                        u32 number_midi;
                        u32 speed;
                        char names[TX_NAMES_SIZE];
                        u32 ac3_caps;
                        u32 ac3_enable;
                } tx;
                struct {
                        u32 iso;
                        u32 seq_start;
                        u32 number_audio;
                        u32 number_midi;
                        char names[RX_NAMES_SIZE];
                        u32 ac3_caps;
                        u32 ac3_enable;
                } rx;
                struct {
                        u32 clock_source;
                        u32 locked;
                        u32 rate;
                        u32 adat_user_data;
                } ext_sync;
        } buf;
        unsigned int quadlets, stream, i;

        if (dice_proc_read_mem(dice, sections, 0, ARRAY_SIZE(sections)) < 0)
                return;
        snd_iprintf(buffer, "sections:\n");
        for (i = 0; i < ARRAY_SIZE(section_names); ++i)
                snd_iprintf(buffer, "  %s: offset %u, size %u\n",
                            section_names[i],
                            sections[i * 2], sections[i * 2 + 1]);

        quadlets = min_t(u32, sections[1], sizeof(buf.global) / 4);
        if (dice_proc_read_mem(dice, &buf.global, sections[0], quadlets) < 0)
                return;
        snd_iprintf(buffer, "global:\n");
        snd_iprintf(buffer, "  owner: %04x:%04x%08x\n",
                    buf.global.owner_hi >> 16,
                    buf.global.owner_hi & 0xffff, buf.global.owner_lo);
        snd_iprintf(buffer, "  notification: %08x\n", buf.global.notification);
        dice_proc_fixup_string(buf.global.nick_name, NICK_NAME_SIZE);
        snd_iprintf(buffer, "  nick name: %s\n", buf.global.nick_name);
        snd_iprintf(buffer, "  clock select: %s %s\n",
                    str_from_array(clock_sources, ARRAY_SIZE(clock_sources),
                                   buf.global.clock_select & CLOCK_SOURCE_MASK),
                    str_from_array(rates, ARRAY_SIZE(rates),
                                   (buf.global.clock_select & CLOCK_RATE_MASK)
                                   >> CLOCK_RATE_SHIFT));
        snd_iprintf(buffer, "  enable: %u\n", buf.global.enable);
        snd_iprintf(buffer, "  status: %slocked %s\n",
                    buf.global.status & STATUS_SOURCE_LOCKED ? "" : "un",
                    str_from_array(rates, ARRAY_SIZE(rates),
                                   (buf.global.status &
                                    STATUS_NOMINAL_RATE_MASK)
                                   >> CLOCK_RATE_SHIFT));
        snd_iprintf(buffer, "  ext status: %08x\n", buf.global.extended_status);
        snd_iprintf(buffer, "  sample rate: %u\n", buf.global.sample_rate);
        if (quadlets >= 90) {
                snd_iprintf(buffer, "  version: %u.%u.%u.%u\n",
                            (buf.global.version >> 24) & 0xff,
                            (buf.global.version >> 16) & 0xff,
                            (buf.global.version >>  8) & 0xff,
                            (buf.global.version >>  0) & 0xff);
                snd_iprintf(buffer, "  clock caps:");
                for (i = 0; i <= 6; ++i)
                        if (buf.global.clock_caps & (1 << i))
                                snd_iprintf(buffer, " %s", rates[i]);
                for (i = 0; i <= 12; ++i)
                        if (buf.global.clock_caps & (1 << (16 + i)))
                                snd_iprintf(buffer, " %s", clock_sources[i]);
                snd_iprintf(buffer, "\n");
                dice_proc_fixup_string(buf.global.clock_source_names,
                                       CLOCK_SOURCE_NAMES_SIZE);
                snd_iprintf(buffer, "  clock source names: %s\n",
                            buf.global.clock_source_names);
        }

        if (dice_proc_read_mem(dice, &tx_rx_header, sections[2], 2) < 0)
                return;
        quadlets = min_t(u32, tx_rx_header.size, sizeof(buf.tx) / 4);
        for (stream = 0; stream < tx_rx_header.number; ++stream) {
                if (dice_proc_read_mem(dice, &buf.tx, sections[2] + 2 +
                                       stream * tx_rx_header.size,
                                       quadlets) < 0)
                        break;
                snd_iprintf(buffer, "tx %u:\n", stream);
                snd_iprintf(buffer, "  iso channel: %d\n", (int)buf.tx.iso);
                snd_iprintf(buffer, "  audio channels: %u\n",
                            buf.tx.number_audio);
                snd_iprintf(buffer, "  midi ports: %u\n", buf.tx.number_midi);
                snd_iprintf(buffer, "  speed: S%u\n", 100u << buf.tx.speed);
                if (quadlets >= 68) {
                        dice_proc_fixup_string(buf.tx.names, TX_NAMES_SIZE);
                        snd_iprintf(buffer, "  names: %s\n", buf.tx.names);
                }
                if (quadlets >= 70) {
                        snd_iprintf(buffer, "  ac3 caps: %08x\n",
                                    buf.tx.ac3_caps);
                        snd_iprintf(buffer, "  ac3 enable: %08x\n",
                                    buf.tx.ac3_enable);
                }
        }

        if (dice_proc_read_mem(dice, &tx_rx_header, sections[4], 2) < 0)
                return;
        quadlets = min_t(u32, tx_rx_header.size, sizeof(buf.rx) / 4);
        for (stream = 0; stream < tx_rx_header.number; ++stream) {
                if (dice_proc_read_mem(dice, &buf.rx, sections[4] + 2 +
                                       stream * tx_rx_header.size,
                                       quadlets) < 0)
                        break;
                snd_iprintf(buffer, "rx %u:\n", stream);
                snd_iprintf(buffer, "  iso channel: %d\n", (int)buf.rx.iso);
                snd_iprintf(buffer, "  sequence start: %u\n", buf.rx.seq_start);
                snd_iprintf(buffer, "  audio channels: %u\n",
                            buf.rx.number_audio);
                snd_iprintf(buffer, "  midi ports: %u\n", buf.rx.number_midi);
                if (quadlets >= 68) {
                        dice_proc_fixup_string(buf.rx.names, RX_NAMES_SIZE);
                        snd_iprintf(buffer, "  names: %s\n", buf.rx.names);
                }
                if (quadlets >= 70) {
                        snd_iprintf(buffer, "  ac3 caps: %08x\n",
                                    buf.rx.ac3_caps);
                        snd_iprintf(buffer, "  ac3 enable: %08x\n",
                                    buf.rx.ac3_enable);
                }
        }

        quadlets = min_t(u32, sections[7], sizeof(buf.ext_sync) / 4);
        if (quadlets >= 4) {
                if (dice_proc_read_mem(dice, &buf.ext_sync,
                                       sections[6], 4) < 0)
                        return;
                snd_iprintf(buffer, "ext status:\n");
                snd_iprintf(buffer, "  clock source: %s\n",
                            str_from_array(clock_sources,
                                           ARRAY_SIZE(clock_sources),
                                           buf.ext_sync.clock_source));
                snd_iprintf(buffer, "  locked: %u\n", buf.ext_sync.locked);
                snd_iprintf(buffer, "  rate: %s\n",
                            str_from_array(rates, ARRAY_SIZE(rates),
                                           buf.ext_sync.rate));
                snd_iprintf(buffer, "  adat user data: ");
                if (buf.ext_sync.adat_user_data & ADAT_USER_DATA_NO_DATA)
                        snd_iprintf(buffer, "-\n");
                else
                        snd_iprintf(buffer, "%x\n",
                                    buf.ext_sync.adat_user_data);
        }
}

static void dice_proc_read_formation(struct snd_info_entry *entry,
                                     struct snd_info_buffer *buffer)
{
        static const char *const rate_labels[] = {
                [SND_DICE_RATE_MODE_LOW]        = "low",
                [SND_DICE_RATE_MODE_MIDDLE]     = "middle",
                [SND_DICE_RATE_MODE_HIGH]       = "high",
        };
        struct snd_dice *dice = entry->private_data;
        int i, j;

        snd_iprintf(buffer, "Output stream from unit:\n");
        for (i = 0; i < SND_DICE_RATE_MODE_COUNT; ++i)
                snd_iprintf(buffer, "\t%s", rate_labels[i]);
        snd_iprintf(buffer, "\tMIDI\n");
        for (i = 0; i < MAX_STREAMS; ++i) {
                snd_iprintf(buffer, "Tx %u:", i);
                for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j)
                        snd_iprintf(buffer, "\t%u", dice->tx_pcm_chs[i][j]);
                snd_iprintf(buffer, "\t%u\n", dice->tx_midi_ports[i]);
        }

        snd_iprintf(buffer, "Input stream to unit:\n");
        for (i = 0; i < SND_DICE_RATE_MODE_COUNT; ++i)
                snd_iprintf(buffer, "\t%s", rate_labels[i]);
        snd_iprintf(buffer, "\n");
        for (i = 0; i < MAX_STREAMS; ++i) {
                snd_iprintf(buffer, "Rx %u:", i);
                for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j)
                        snd_iprintf(buffer, "\t%u", dice->rx_pcm_chs[i][j]);
                snd_iprintf(buffer, "\t%u\n", dice->rx_midi_ports[i]);
        }
}

static void add_node(struct snd_dice *dice, struct snd_info_entry *root,
                     const char *name,
                     void (*op)(struct snd_info_entry *entry,
                                struct snd_info_buffer *buffer))
{
        struct snd_info_entry *entry;

        entry = snd_info_create_card_entry(dice->card, name, root);
        if (entry)
                snd_info_set_text_ops(entry, dice, op);
}

void snd_dice_create_proc(struct snd_dice *dice)
{
        struct snd_info_entry *root;

        /*
         * All nodes are automatically removed at snd_card_disconnect(),
         * by following to link list.
         */
        root = snd_info_create_card_entry(dice->card, "firewire",
                                          dice->card->proc_root);
        if (!root)
                return;
        root->mode = S_IFDIR | 0555;

        add_node(dice, root, "dice", dice_proc_read);
        add_node(dice, root, "formation", dice_proc_read_formation);
}