// SPDX-License-Identifier: GPL-2.0-only
/*
 * oxfw.c - a part of driver for OXFW970/971 based devices
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 */

#include "oxfw.h"

#define OXFORD_FIRMWARE_ID_ADDRESS      (CSR_REGISTER_BASE + 0x50000)
/* 0x970?vvvv or 0x971?vvvv, where vvvv = firmware version */

#define OXFORD_HARDWARE_ID_ADDRESS      (CSR_REGISTER_BASE + 0x90020)
#define OXFORD_HARDWARE_ID_OXFW970      0x39443841
#define OXFORD_HARDWARE_ID_OXFW971      0x39373100

#define VENDOR_LOUD             0x000ff2
#define VENDOR_GRIFFIN          0x001292
#define VENDOR_BEHRINGER        0x001564
#define VENDOR_LACIE            0x00d04b
#define VENDOR_TASCAM           0x00022e
#define OUI_STANTON             0x001260
#define OUI_APOGEE              0x0003db

#define MODEL_SATELLITE         0x00200f
#define MODEL_SCS1M             0x001000
#define MODEL_DUET_FW           0x01dddd

#define SPECIFIER_1394TA        0x00a02d
#define VERSION_AVC             0x010001

MODULE_DESCRIPTION("Oxford Semiconductor FW970/971 driver");
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("snd-firewire-speakers");
MODULE_ALIAS("snd-scs1x");

struct compat_info {
        const char *driver_name;
        const char *vendor_name;
        const char *model_name;
};

static bool detect_loud_models(struct fw_unit *unit)
{
        const char *const models[] = {
                "Onyxi",
                "Onyx-i",
                "Onyx 1640i",
                "d.Pro",
                "U.420"};
        char model[32];
        int err;

        err = fw_csr_string(unit->directory, CSR_MODEL,
                            model, sizeof(model));
        if (err < 0)
                return false;

        return match_string(models, ARRAY_SIZE(models), model) >= 0;
}

static int name_card(struct snd_oxfw *oxfw, const struct ieee1394_device_id *entry)
{
        struct fw_device *fw_dev = fw_parent_device(oxfw->unit);
        const struct compat_info *info;
        char vendor[24];
        char model[32];
        const char *d, *v, *m;
        u32 firmware;
        int err;

        /* get vendor name from root directory */
        err = fw_csr_string(fw_dev->config_rom + 5, CSR_VENDOR,
                            vendor, sizeof(vendor));
        if (err < 0)
                goto end;

        /* get model name from unit directory */
        err = fw_csr_string(oxfw->unit->directory, CSR_MODEL,
                            model, sizeof(model));
        if (err < 0)
                goto end;

        err = snd_fw_transaction(oxfw->unit, TCODE_READ_QUADLET_REQUEST,
                                 OXFORD_FIRMWARE_ID_ADDRESS, &firmware, 4, 0);
        if (err < 0)
                goto end;
        be32_to_cpus(&firmware);

        if (firmware >> 20 == 0x970)
                oxfw->quirks |= SND_OXFW_QUIRK_JUMBO_PAYLOAD;

        /* to apply card definitions */
        if (entry->vendor_id == VENDOR_GRIFFIN || entry->vendor_id == VENDOR_LACIE) {
                info = (const struct compat_info *)entry->driver_data;
                d = info->driver_name;
                v = info->vendor_name;
                m = info->model_name;
        } else {
                d = "OXFW";
                v = vendor;
                m = model;
        }

        strcpy(oxfw->card->driver, d);
        strcpy(oxfw->card->mixername, m);
        strcpy(oxfw->card->shortname, m);

        snprintf(oxfw->card->longname, sizeof(oxfw->card->longname),
                 "%s %s (OXFW%x %04x), GUID %08x%08x at %s, S%d",
                 v, m, firmware >> 20, firmware & 0xffff,
                 fw_dev->config_rom[3], fw_dev->config_rom[4],
                 dev_name(&oxfw->unit->device), 100 << fw_dev->max_speed);
end:
        return err;
}

static void oxfw_card_free(struct snd_card *card)
{
        struct snd_oxfw *oxfw = card->private_data;

        if (oxfw->has_output || oxfw->has_input)
                snd_oxfw_stream_destroy_duplex(oxfw);

        mutex_destroy(&oxfw->mutex);
        fw_unit_put(oxfw->unit);
}

static int detect_quirks(struct snd_oxfw *oxfw, const struct ieee1394_device_id *entry)
{
        struct fw_device *fw_dev = fw_parent_device(oxfw->unit);
        struct fw_csr_iterator it;
        int key, val;
        int vendor, model;

        /*
         * Add ALSA control elements for two models to keep compatibility to
         * old firewire-speaker module.
         */
        if (entry->vendor_id == VENDOR_GRIFFIN)
                return snd_oxfw_add_spkr(oxfw, false);
        if (entry->vendor_id == VENDOR_LACIE)
                return snd_oxfw_add_spkr(oxfw, true);

        /*
         * Stanton models supports asynchronous transactions for unique MIDI
         * messages.
         */
        if (entry->vendor_id == OUI_STANTON) {
                oxfw->quirks |= SND_OXFW_QUIRK_SCS_TRANSACTION;
                if (entry->model_id == MODEL_SCS1M)
                        oxfw->quirks |= SND_OXFW_QUIRK_BLOCKING_TRANSMISSION;

                // No physical MIDI ports.
                oxfw->midi_input_ports = 0;
                oxfw->midi_output_ports = 0;

                return snd_oxfw_scs1x_add(oxfw);
        }

        if (entry->vendor_id == OUI_APOGEE && entry->model_id == MODEL_DUET_FW) {
                oxfw->quirks |= SND_OXFW_QUIRK_BLOCKING_TRANSMISSION |
                                SND_OXFW_QUIRK_IGNORE_NO_INFO_PACKET;
        }

        /*
         * TASCAM FireOne has physical control and requires a pair of additional
         * MIDI ports.
         */
        if (entry->vendor_id == VENDOR_TASCAM) {
                oxfw->midi_input_ports++;
                oxfw->midi_output_ports++;
                return 0;
        }

        /* Seek from Root Directory of Config ROM. */
        vendor = model = 0;
        fw_csr_iterator_init(&it, fw_dev->config_rom + 5);
        while (fw_csr_iterator_next(&it, &key, &val)) {
                if (key == CSR_VENDOR)
                        vendor = val;
                else if (key == CSR_MODEL)
                        model = val;
        }

        if (vendor == VENDOR_LOUD) {
                // Mackie Onyx Satellite with base station has a quirk to report a wrong
                // value in 'dbs' field of CIP header against its format information.
                oxfw->quirks |= SND_OXFW_QUIRK_WRONG_DBS;

                // OXFW971-based models may transfer events by blocking method.
                if (!(oxfw->quirks & SND_OXFW_QUIRK_JUMBO_PAYLOAD))
                        oxfw->quirks |= SND_OXFW_QUIRK_BLOCKING_TRANSMISSION;
        }

        return 0;
}

static int oxfw_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
{
        struct snd_card *card;
        struct snd_oxfw *oxfw;
        int err;

        if (entry->vendor_id == VENDOR_LOUD && entry->model_id == 0 && !detect_loud_models(unit))
                return -ENODEV;

        err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*oxfw), &card);
        if (err < 0)
                return err;
        card->private_free = oxfw_card_free;

        oxfw = card->private_data;
        oxfw->unit = fw_unit_get(unit);
        dev_set_drvdata(&unit->device, oxfw);
        oxfw->card = card;

        mutex_init(&oxfw->mutex);
        spin_lock_init(&oxfw->lock);
        init_waitqueue_head(&oxfw->hwdep_wait);

        err = name_card(oxfw, entry);
        if (err < 0)
                goto error;

        err = snd_oxfw_stream_discover(oxfw);
        if (err < 0)
                goto error;

        err = detect_quirks(oxfw, entry);
        if (err < 0)
                goto error;

        if (oxfw->has_output || oxfw->has_input) {
                err = snd_oxfw_stream_init_duplex(oxfw);
                if (err < 0)
                        goto error;

                err = snd_oxfw_create_pcm(oxfw);
                if (err < 0)
                        goto error;

                snd_oxfw_proc_init(oxfw);

                err = snd_oxfw_create_midi(oxfw);
                if (err < 0)
                        goto error;

                err = snd_oxfw_create_hwdep(oxfw);
                if (err < 0)
                        goto error;
        }

        err = snd_card_register(card);
        if (err < 0)
                goto error;

        return 0;
error:
        snd_card_free(card);
        return err;
}

static void oxfw_bus_reset(struct fw_unit *unit)
{
        struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);

        fcp_bus_reset(oxfw->unit);

        if (oxfw->has_output || oxfw->has_input) {
                mutex_lock(&oxfw->mutex);
                snd_oxfw_stream_update_duplex(oxfw);
                mutex_unlock(&oxfw->mutex);
        }

        if (oxfw->quirks & SND_OXFW_QUIRK_SCS_TRANSACTION)
                snd_oxfw_scs1x_update(oxfw);
}

static void oxfw_remove(struct fw_unit *unit)
{
        struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);

        // Block till all of ALSA character devices are released.
        snd_card_free(oxfw->card);
}

static const struct compat_info griffin_firewave = {
        .driver_name = "FireWave",
        .vendor_name = "Griffin",
        .model_name = "FireWave",
};

static const struct compat_info lacie_speakers = {
        .driver_name = "FWSpeakers",
        .vendor_name = "LaCie",
        .model_name = "FireWire Speakers",
};

#define OXFW_DEV_ENTRY(vendor, model, data) \
{ \
        .match_flags  = IEEE1394_MATCH_VENDOR_ID | \
                        IEEE1394_MATCH_MODEL_ID | \
                        IEEE1394_MATCH_SPECIFIER_ID | \
                        IEEE1394_MATCH_VERSION, \
        .vendor_id    = vendor, \
        .model_id     = model, \
        .specifier_id = SPECIFIER_1394TA, \
        .version      = VERSION_AVC, \
        .driver_data  = (kernel_ulong_t)data, \
}

static const struct ieee1394_device_id oxfw_id_table[] = {
        //
        // OXFW970 devices:
        // Initial firmware has a quirk to postpone isoc packet transmission during finishing async
        // transaction. As a result, several isochronous cycles are skipped to transfer the packets
        // and the audio data frames which should have been transferred during the cycles are put
        // into packet at the first isoc cycle after the postpone. Furthermore, the value of SYT
        // field in CIP header is not reliable as synchronization timing,
        //
        OXFW_DEV_ENTRY(VENDOR_GRIFFIN, 0x00f970, &griffin_firewave),
        OXFW_DEV_ENTRY(VENDOR_LACIE, 0x00f970, &lacie_speakers),
        // Behringer,F-Control Audio 202. The value of SYT field is not reliable at all.
        OXFW_DEV_ENTRY(VENDOR_BEHRINGER, 0x00fc22, NULL),
        // Loud Technologies, Tapco Link.FireWire 4x6. The value of SYT field is always 0xffff.
        OXFW_DEV_ENTRY(VENDOR_LOUD, 0x000460, NULL),
        // Loud Technologies, Mackie Onyx Satellite. Although revised version of firmware is
        // installed to avoid the postpone, the value of SYT field is always 0xffff.
        OXFW_DEV_ENTRY(VENDOR_LOUD, MODEL_SATELLITE, NULL),
        // Miglia HarmonyAudio. Not yet identified.

        //
        // OXFW971 devices:
        // The value of SYT field in CIP header is enough reliable. Both of blocking and non-blocking
        // transmission methods are available.
        //
        // Any Mackie(Loud) models (name string/model id):
        //  Onyx-i series (former models):      0x081216
        //  Onyx 1640i:                         0x001640
        //  d.2 pro/d.4 pro (built-in card):    Unknown
        //  U.420:                              Unknown
        //  U.420d:                             Unknown
        {
                .match_flags    = IEEE1394_MATCH_VENDOR_ID |
                                  IEEE1394_MATCH_SPECIFIER_ID |
                                  IEEE1394_MATCH_VERSION,
                .vendor_id      = VENDOR_LOUD,
                .model_id       = 0,
                .specifier_id   = SPECIFIER_1394TA,
                .version        = VERSION_AVC,
        },
        // TASCAM, FireOne.
        OXFW_DEV_ENTRY(VENDOR_TASCAM, 0x800007, NULL),
        // Stanton, Stanton Controllers & Systems 1 Mixer (SCS.1m).
        OXFW_DEV_ENTRY(OUI_STANTON, MODEL_SCS1M, NULL),
        // Stanton, Stanton Controllers & Systems 1 Deck (SCS.1d).
        OXFW_DEV_ENTRY(OUI_STANTON, 0x002000, NULL),
        // APOGEE, duet FireWire.
        OXFW_DEV_ENTRY(OUI_APOGEE, MODEL_DUET_FW, NULL),
        { }
};
MODULE_DEVICE_TABLE(ieee1394, oxfw_id_table);

static struct fw_driver oxfw_driver = {
        .driver   = {
                .owner  = THIS_MODULE,
                .name   = KBUILD_MODNAME,
                .bus    = &fw_bus_type,
        },
        .probe    = oxfw_probe,
        .update   = oxfw_bus_reset,
        .remove   = oxfw_remove,
        .id_table = oxfw_id_table,
};

static int __init snd_oxfw_init(void)
{
        return driver_register(&oxfw_driver.driver);
}

static void __exit snd_oxfw_exit(void)
{
        driver_unregister(&oxfw_driver.driver);
}

module_init(snd_oxfw_init);
module_exit(snd_oxfw_exit);