linux_dsm_epyc7002/sound/firewire/oxfw/oxfw.c
Takashi Sakamoto 61ccc6f6b2 ALSA: firewire: block .remove callback of bus driver till all of ALSA character devices are released
At present, in .remove callback of bus driver just decrease reference
count of device for ALSA card instance. This delegates release of the
device to a process in which the last of ALSA character device is
released.

On the other hand, the other drivers such as for devices on PCIe are
programmed to block .remove callback of bus driver till all of ALSA
character devices are released.

For consistency of behaviour for whole drivers, this probably confuses
users. This commit takes drivers in ALSA firewire stack to imitate the
above behaviour.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-10-10 12:11:34 +02:00

447 lines
11 KiB
C

/*
* oxfw.c - a part of driver for OXFW970/971 based devices
*
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
* Licensed under the terms of the GNU General Public License, version 2.
*/
#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 MODEL_SATELLITE 0x00200f
#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",
"Mackie Onyx Satellite",
"Tapco LINK.firewire 4x6",
"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)
{
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);
/* to apply card definitions */
if (oxfw->entry->vendor_id == VENDOR_GRIFFIN ||
oxfw->entry->vendor_id == VENDOR_LACIE) {
info = (const struct compat_info *)oxfw->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_free(struct snd_oxfw *oxfw)
{
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
mutex_destroy(&oxfw->mutex);
fw_unit_put(oxfw->unit);
}
/*
* This module releases the FireWire unit data after all ALSA character devices
* are released by applications. This is for releasing stream data or finishing
* transactions safely. Thus at returning from .remove(), this module still keep
* references for the unit.
*/
static void oxfw_card_free(struct snd_card *card)
{
oxfw_free(card->private_data);
}
static int detect_quirks(struct snd_oxfw *oxfw)
{
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 (oxfw->entry->vendor_id == VENDOR_GRIFFIN)
return snd_oxfw_add_spkr(oxfw, false);
if (oxfw->entry->vendor_id == VENDOR_LACIE)
return snd_oxfw_add_spkr(oxfw, true);
/*
* Stanton models supports asynchronous transactions for unique MIDI
* messages.
*/
if (oxfw->entry->vendor_id == OUI_STANTON) {
/* No physical MIDI ports. */
oxfw->midi_input_ports = 0;
oxfw->midi_output_ports = 0;
/* Output stream exists but no data channels are useful. */
oxfw->has_output = false;
return snd_oxfw_scs1x_add(oxfw);
}
/*
* TASCAM FireOne has physical control and requires a pair of additional
* MIDI ports.
*/
if (oxfw->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;
}
/*
* Mackie Onyx Satellite with base station has a quirk to report a wrong
* value in 'dbs' field of CIP header against its format information.
*/
if (vendor == VENDOR_LOUD && model == MODEL_SATELLITE)
oxfw->wrong_dbs = true;
return 0;
}
static void do_registration(struct work_struct *work)
{
struct snd_oxfw *oxfw = container_of(work, struct snd_oxfw, dwork.work);
int err;
if (oxfw->registered)
return;
err = snd_card_new(&oxfw->unit->device, -1, NULL, THIS_MODULE, 0,
&oxfw->card);
if (err < 0)
return;
err = name_card(oxfw);
if (err < 0)
goto error;
err = snd_oxfw_stream_discover(oxfw);
if (err < 0)
goto error;
err = detect_quirks(oxfw);
if (err < 0)
goto error;
err = snd_oxfw_stream_init_simplex(oxfw, &oxfw->rx_stream);
if (err < 0)
goto error;
if (oxfw->has_output) {
err = snd_oxfw_stream_init_simplex(oxfw, &oxfw->tx_stream);
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(oxfw->card);
if (err < 0)
goto error;
/*
* After registered, oxfw instance can be released corresponding to
* releasing the sound card instance.
*/
oxfw->card->private_free = oxfw_card_free;
oxfw->card->private_data = oxfw;
oxfw->registered = true;
return;
error:
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
snd_card_free(oxfw->card);
dev_info(&oxfw->unit->device,
"Sound card registration failed: %d\n", err);
}
static int oxfw_probe(struct fw_unit *unit,
const struct ieee1394_device_id *entry)
{
struct snd_oxfw *oxfw;
if (entry->vendor_id == VENDOR_LOUD && !detect_loud_models(unit))
return -ENODEV;
/* Allocate this independent of sound card instance. */
oxfw = devm_kzalloc(&unit->device, sizeof(struct snd_oxfw), GFP_KERNEL);
if (!oxfw)
return -ENOMEM;
oxfw->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, oxfw);
oxfw->entry = entry;
mutex_init(&oxfw->mutex);
spin_lock_init(&oxfw->lock);
init_waitqueue_head(&oxfw->hwdep_wait);
/* Allocate and register this sound card later. */
INIT_DEFERRABLE_WORK(&oxfw->dwork, do_registration);
snd_fw_schedule_registration(unit, &oxfw->dwork);
return 0;
}
static void oxfw_bus_reset(struct fw_unit *unit)
{
struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);
if (!oxfw->registered)
snd_fw_schedule_registration(unit, &oxfw->dwork);
fcp_bus_reset(oxfw->unit);
if (oxfw->registered) {
mutex_lock(&oxfw->mutex);
snd_oxfw_stream_update_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_update_simplex(oxfw, &oxfw->tx_stream);
mutex_unlock(&oxfw->mutex);
if (oxfw->entry->vendor_id == OUI_STANTON)
snd_oxfw_scs1x_update(oxfw);
}
}
static void oxfw_remove(struct fw_unit *unit)
{
struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);
/*
* Confirm to stop the work for registration before the sound card is
* going to be released. The work is not scheduled again because bus
* reset handler is not called anymore.
*/
cancel_delayed_work_sync(&oxfw->dwork);
if (oxfw->registered) {
// Block till all of ALSA character devices are released.
snd_card_free(oxfw->card);
} else {
/* Don't forget this case. */
oxfw_free(oxfw);
}
}
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",
};
static const struct ieee1394_device_id oxfw_id_table[] = {
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID |
IEEE1394_MATCH_SPECIFIER_ID |
IEEE1394_MATCH_VERSION,
.vendor_id = VENDOR_GRIFFIN,
.model_id = 0x00f970,
.specifier_id = SPECIFIER_1394TA,
.version = VERSION_AVC,
.driver_data = (kernel_ulong_t)&griffin_firewave,
},
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID |
IEEE1394_MATCH_SPECIFIER_ID |
IEEE1394_MATCH_VERSION,
.vendor_id = VENDOR_LACIE,
.model_id = 0x00f970,
.specifier_id = SPECIFIER_1394TA,
.version = VERSION_AVC,
.driver_data = (kernel_ulong_t)&lacie_speakers,
},
/* Behringer,F-Control Audio 202 */
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID,
.vendor_id = VENDOR_BEHRINGER,
.model_id = 0x00fc22,
},
/*
* Any Mackie(Loud) models (name string/model id):
* Onyx-i series (former models): 0x081216
* Mackie Onyx Satellite: 0x00200f
* Tapco LINK.firewire 4x6: 0x000460
* d.2 pro: Unknown
* d.4 pro: Unknown
* U.420: Unknown
* U.420d: Unknown
*/
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_SPECIFIER_ID |
IEEE1394_MATCH_VERSION,
.vendor_id = VENDOR_LOUD,
.specifier_id = SPECIFIER_1394TA,
.version = VERSION_AVC,
},
/* TASCAM, FireOne */
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID,
.vendor_id = VENDOR_TASCAM,
.model_id = 0x800007,
},
/* Stanton, Stanton Controllers & Systems 1 Mixer (SCS.1m) */
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID,
.vendor_id = OUI_STANTON,
.model_id = 0x001000,
},
/* Stanton, Stanton Controllers & Systems 1 Deck (SCS.1d) */
{
.match_flags = IEEE1394_MATCH_VENDOR_ID |
IEEE1394_MATCH_MODEL_ID,
.vendor_id = OUI_STANTON,
.model_id = 0x002000,
},
{ }
};
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);