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Diffstat (limited to 'sound/firewire/dice/dice.c')
-rw-r--r--sound/firewire/dice/dice.c361
1 files changed, 361 insertions, 0 deletions
diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c
new file mode 100644
index 000000000000..90d8f40ff727
--- /dev/null
+++ b/sound/firewire/dice/dice.c
@@ -0,0 +1,361 @@
+/*
+ * TC Applied Technologies Digital Interface Communications Engine driver
+ *
+ * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "dice.h"
+
+MODULE_DESCRIPTION("DICE driver");
+MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
+MODULE_LICENSE("GPL v2");
+
+#define OUI_WEISS 0x001c6a
+
+#define DICE_CATEGORY_ID 0x04
+#define WEISS_CATEGORY_ID 0x00
+
+static int dice_interface_check(struct fw_unit *unit)
+{
+ static const int min_values[10] = {
+ 10, 0x64 / 4,
+ 10, 0x18 / 4,
+ 10, 0x18 / 4,
+ 0, 0,
+ 0, 0,
+ };
+ struct fw_device *device = fw_parent_device(unit);
+ struct fw_csr_iterator it;
+ int key, val, vendor = -1, model = -1, err;
+ unsigned int category, i;
+ __be32 *pointers, value;
+ __be32 version;
+
+ pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32),
+ GFP_KERNEL);
+ if (pointers == NULL)
+ return -ENOMEM;
+
+ /*
+ * Check that GUID and unit directory are constructed according to DICE
+ * rules, i.e., that the specifier ID is the GUID's OUI, and that the
+ * GUID chip ID consists of the 8-bit category ID, the 10-bit product
+ * ID, and a 22-bit serial number.
+ */
+ fw_csr_iterator_init(&it, unit->directory);
+ while (fw_csr_iterator_next(&it, &key, &val)) {
+ switch (key) {
+ case CSR_SPECIFIER_ID:
+ vendor = val;
+ break;
+ case CSR_MODEL:
+ model = val;
+ break;
+ }
+ }
+ if (vendor == OUI_WEISS)
+ category = WEISS_CATEGORY_ID;
+ else
+ category = DICE_CATEGORY_ID;
+ if (device->config_rom[3] != ((vendor << 8) | category) ||
+ device->config_rom[4] >> 22 != model) {
+ err = -ENODEV;
+ goto end;
+ }
+
+ /*
+ * Check that the sub address spaces exist and are located inside the
+ * private address space. The minimum values are chosen so that all
+ * minimally required registers are included.
+ */
+ err = snd_fw_transaction(unit, TCODE_READ_BLOCK_REQUEST,
+ DICE_PRIVATE_SPACE, pointers,
+ sizeof(__be32) * ARRAY_SIZE(min_values), 0);
+ if (err < 0) {
+ err = -ENODEV;
+ goto end;
+ }
+ for (i = 0; i < ARRAY_SIZE(min_values); ++i) {
+ value = be32_to_cpu(pointers[i]);
+ if (value < min_values[i] || value >= 0x40000) {
+ err = -ENODEV;
+ goto end;
+ }
+ }
+
+ /*
+ * Check that the implemented DICE driver specification major version
+ * number matches.
+ */
+ err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
+ DICE_PRIVATE_SPACE +
+ be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION,
+ &version, 4, 0);
+ if (err < 0) {
+ err = -ENODEV;
+ goto end;
+ }
+ if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) {
+ dev_err(&unit->device,
+ "unknown DICE version: 0x%08x\n", be32_to_cpu(version));
+ err = -ENODEV;
+ goto end;
+ }
+end:
+ return err;
+}
+
+static int highest_supported_mode_rate(struct snd_dice *dice,
+ unsigned int mode, unsigned int *rate)
+{
+ unsigned int i, m;
+
+ for (i = ARRAY_SIZE(snd_dice_rates); i > 0; i--) {
+ *rate = snd_dice_rates[i - 1];
+ if (snd_dice_stream_get_rate_mode(dice, *rate, &m) < 0)
+ continue;
+ if (mode == m)
+ break;
+ }
+ if (i == 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int dice_read_mode_params(struct snd_dice *dice, unsigned int mode)
+{
+ __be32 values[2];
+ unsigned int rate;
+ int err;
+
+ if (highest_supported_mode_rate(dice, mode, &rate) < 0) {
+ dice->tx_channels[mode] = 0;
+ dice->tx_midi_ports[mode] = 0;
+ dice->rx_channels[mode] = 0;
+ dice->rx_midi_ports[mode] = 0;
+ return 0;
+ }
+
+ err = snd_dice_transaction_set_rate(dice, rate);
+ if (err < 0)
+ return err;
+
+ err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO,
+ values, sizeof(values));
+ if (err < 0)
+ return err;
+
+ dice->tx_channels[mode] = be32_to_cpu(values[0]);
+ dice->tx_midi_ports[mode] = be32_to_cpu(values[1]);
+
+ err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO,
+ values, sizeof(values));
+ if (err < 0)
+ return err;
+
+ dice->rx_channels[mode] = be32_to_cpu(values[0]);
+ dice->rx_midi_ports[mode] = be32_to_cpu(values[1]);
+
+ return 0;
+}
+
+static int dice_read_params(struct snd_dice *dice)
+{
+ __be32 value;
+ int mode, err;
+
+ /* some very old firmwares don't tell about their clock support */
+ if (dice->clock_caps > 0) {
+ err = snd_dice_transaction_read_global(dice,
+ GLOBAL_CLOCK_CAPABILITIES,
+ &value, 4);
+ if (err < 0)
+ return err;
+ dice->clock_caps = be32_to_cpu(value);
+ } else {
+ /* this should be supported by any device */
+ dice->clock_caps = CLOCK_CAP_RATE_44100 |
+ CLOCK_CAP_RATE_48000 |
+ CLOCK_CAP_SOURCE_ARX1 |
+ CLOCK_CAP_SOURCE_INTERNAL;
+ }
+
+ for (mode = 2; mode >= 0; --mode) {
+ err = dice_read_mode_params(dice, mode);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static void dice_card_strings(struct snd_dice *dice)
+{
+ struct snd_card *card = dice->card;
+ struct fw_device *dev = fw_parent_device(dice->unit);
+ char vendor[32], model[32];
+ unsigned int i;
+ int err;
+
+ strcpy(card->driver, "DICE");
+
+ strcpy(card->shortname, "DICE");
+ BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname));
+ err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME,
+ card->shortname,
+ sizeof(card->shortname));
+ if (err >= 0) {
+ /* DICE strings are returned in "always-wrong" endianness */
+ BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0);
+ for (i = 0; i < sizeof(card->shortname); i += 4)
+ swab32s((u32 *)&card->shortname[i]);
+ card->shortname[sizeof(card->shortname) - 1] = '\0';
+ }
+
+ strcpy(vendor, "?");
+ fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor));
+ strcpy(model, "?");
+ fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model));
+ snprintf(card->longname, sizeof(card->longname),
+ "%s %s (serial %u) at %s, S%d",
+ vendor, model, dev->config_rom[4] & 0x3fffff,
+ dev_name(&dice->unit->device), 100 << dev->max_speed);
+
+ strcpy(card->mixername, "DICE");
+}
+
+static void dice_card_free(struct snd_card *card)
+{
+ struct snd_dice *dice = card->private_data;
+
+ snd_dice_transaction_destroy(dice);
+ mutex_destroy(&dice->mutex);
+}
+
+static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id)
+{
+ struct snd_card *card;
+ struct snd_dice *dice;
+ int err;
+
+ err = dice_interface_check(unit);
+ if (err < 0)
+ goto end;
+
+ err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE,
+ sizeof(*dice), &card);
+ if (err < 0)
+ goto end;
+
+ dice = card->private_data;
+ dice->card = card;
+ dice->unit = unit;
+ card->private_free = dice_card_free;
+
+ spin_lock_init(&dice->lock);
+ mutex_init(&dice->mutex);
+ init_completion(&dice->clock_accepted);
+ init_waitqueue_head(&dice->hwdep_wait);
+
+ err = snd_dice_transaction_init(dice);
+ if (err < 0)
+ goto error;
+
+ err = dice_read_params(dice);
+ if (err < 0)
+ goto error;
+
+ dice_card_strings(dice);
+
+ err = snd_dice_create_pcm(dice);
+ if (err < 0)
+ goto error;
+
+ err = snd_dice_create_hwdep(dice);
+ if (err < 0)
+ goto error;
+
+ snd_dice_create_proc(dice);
+
+ err = snd_dice_create_midi(dice);
+ if (err < 0)
+ goto error;
+
+ err = snd_dice_stream_init_duplex(dice);
+ if (err < 0)
+ goto error;
+
+ err = snd_card_register(card);
+ if (err < 0) {
+ snd_dice_stream_destroy_duplex(dice);
+ goto error;
+ }
+
+ dev_set_drvdata(&unit->device, dice);
+end:
+ return err;
+error:
+ snd_card_free(card);
+ return err;
+}
+
+static void dice_remove(struct fw_unit *unit)
+{
+ struct snd_dice *dice = dev_get_drvdata(&unit->device);
+
+ snd_card_disconnect(dice->card);
+
+ snd_dice_stream_destroy_duplex(dice);
+
+ snd_card_free_when_closed(dice->card);
+}
+
+static void dice_bus_reset(struct fw_unit *unit)
+{
+ struct snd_dice *dice = dev_get_drvdata(&unit->device);
+
+ /* The handler address register becomes initialized. */
+ snd_dice_transaction_reinit(dice);
+
+ mutex_lock(&dice->mutex);
+ snd_dice_stream_update_duplex(dice);
+ mutex_unlock(&dice->mutex);
+}
+
+#define DICE_INTERFACE 0x000001
+
+static const struct ieee1394_device_id dice_id_table[] = {
+ {
+ .match_flags = IEEE1394_MATCH_VERSION,
+ .version = DICE_INTERFACE,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(ieee1394, dice_id_table);
+
+static struct fw_driver dice_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = KBUILD_MODNAME,
+ .bus = &fw_bus_type,
+ },
+ .probe = dice_probe,
+ .update = dice_bus_reset,
+ .remove = dice_remove,
+ .id_table = dice_id_table,
+};
+
+static int __init alsa_dice_init(void)
+{
+ return driver_register(&dice_driver.driver);
+}
+
+static void __exit alsa_dice_exit(void)
+{
+ driver_unregister(&dice_driver.driver);
+}
+
+module_init(alsa_dice_init);
+module_exit(alsa_dice_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 03:25:49 +0000