| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Universal MIDI Packet (UMP) support |
| */ |
| |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/export.h> |
| #include <linux/mm.h> |
| #include <sound/core.h> |
| #include <sound/rawmidi.h> |
| #include <sound/ump.h> |
| #include <sound/ump_convert.h> |
| |
| #define ump_err(ump, fmt, args...) dev_err((ump)->core.dev, fmt, ##args) |
| #define ump_warn(ump, fmt, args...) dev_warn((ump)->core.dev, fmt, ##args) |
| #define ump_info(ump, fmt, args...) dev_info((ump)->core.dev, fmt, ##args) |
| #define ump_dbg(ump, fmt, args...) dev_dbg((ump)->core.dev, fmt, ##args) |
| |
| static int snd_ump_dev_register(struct snd_rawmidi *rmidi); |
| static int snd_ump_dev_unregister(struct snd_rawmidi *rmidi); |
| static long snd_ump_ioctl(struct snd_rawmidi *rmidi, unsigned int cmd, |
| void __user *argp); |
| static void snd_ump_proc_read(struct snd_info_entry *entry, |
| struct snd_info_buffer *buffer); |
| static int snd_ump_rawmidi_open(struct snd_rawmidi_substream *substream); |
| static int snd_ump_rawmidi_close(struct snd_rawmidi_substream *substream); |
| static void snd_ump_rawmidi_trigger(struct snd_rawmidi_substream *substream, |
| int up); |
| static void snd_ump_rawmidi_drain(struct snd_rawmidi_substream *substream); |
| |
| static void ump_handle_stream_msg(struct snd_ump_endpoint *ump, |
| const u32 *buf, int size); |
| #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) |
| static int process_legacy_output(struct snd_ump_endpoint *ump, |
| u32 *buffer, int count); |
| static void process_legacy_input(struct snd_ump_endpoint *ump, const u32 *src, |
| int words); |
| #else |
| static inline int process_legacy_output(struct snd_ump_endpoint *ump, |
| u32 *buffer, int count) |
| { |
| return 0; |
| } |
| static inline void process_legacy_input(struct snd_ump_endpoint *ump, |
| const u32 *src, int words) |
| { |
| } |
| #endif |
| |
| static const struct snd_rawmidi_global_ops snd_ump_rawmidi_ops = { |
| .dev_register = snd_ump_dev_register, |
| .dev_unregister = snd_ump_dev_unregister, |
| .ioctl = snd_ump_ioctl, |
| .proc_read = snd_ump_proc_read, |
| }; |
| |
| static const struct snd_rawmidi_ops snd_ump_rawmidi_input_ops = { |
| .open = snd_ump_rawmidi_open, |
| .close = snd_ump_rawmidi_close, |
| .trigger = snd_ump_rawmidi_trigger, |
| }; |
| |
| static const struct snd_rawmidi_ops snd_ump_rawmidi_output_ops = { |
| .open = snd_ump_rawmidi_open, |
| .close = snd_ump_rawmidi_close, |
| .trigger = snd_ump_rawmidi_trigger, |
| .drain = snd_ump_rawmidi_drain, |
| }; |
| |
| static void snd_ump_endpoint_free(struct snd_rawmidi *rmidi) |
| { |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi); |
| struct snd_ump_block *fb; |
| |
| while (!list_empty(&ump->block_list)) { |
| fb = list_first_entry(&ump->block_list, struct snd_ump_block, |
| list); |
| list_del(&fb->list); |
| if (fb->private_free) |
| fb->private_free(fb); |
| kfree(fb); |
| } |
| |
| if (ump->private_free) |
| ump->private_free(ump); |
| |
| #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) |
| kfree(ump->out_cvts); |
| #endif |
| } |
| |
| /** |
| * snd_ump_endpoint_new - create a UMP Endpoint object |
| * @card: the card instance |
| * @id: the id string for rawmidi |
| * @device: the device index for rawmidi |
| * @output: 1 for enabling output |
| * @input: 1 for enabling input |
| * @ump_ret: the pointer to store the new UMP instance |
| * |
| * Creates a new UMP Endpoint object. A UMP Endpoint is tied with one rawmidi |
| * instance with one input and/or one output rawmidi stream (either uni- |
| * or bi-directional). A UMP Endpoint may contain one or multiple UMP Blocks |
| * that consist of one or multiple UMP Groups. |
| * |
| * Use snd_rawmidi_set_ops() to set the operators to the new instance. |
| * Unlike snd_rawmidi_new(), this function sets up the info_flags by itself |
| * depending on the given @output and @input. |
| * |
| * The device has SNDRV_RAWMIDI_INFO_UMP flag set and a different device |
| * file ("umpCxDx") than a standard MIDI 1.x device ("midiCxDx") is |
| * created. |
| * |
| * Return: Zero if successful, or a negative error code on failure. |
| */ |
| int snd_ump_endpoint_new(struct snd_card *card, char *id, int device, |
| int output, int input, |
| struct snd_ump_endpoint **ump_ret) |
| { |
| unsigned int info_flags = SNDRV_RAWMIDI_INFO_UMP; |
| struct snd_ump_endpoint *ump; |
| int err; |
| |
| if (input) |
| info_flags |= SNDRV_RAWMIDI_INFO_INPUT; |
| if (output) |
| info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; |
| if (input && output) |
| info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; |
| |
| ump = kzalloc(sizeof(*ump), GFP_KERNEL); |
| if (!ump) |
| return -ENOMEM; |
| INIT_LIST_HEAD(&ump->block_list); |
| mutex_init(&ump->open_mutex); |
| init_waitqueue_head(&ump->stream_wait); |
| #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) |
| spin_lock_init(&ump->legacy_locks[0]); |
| spin_lock_init(&ump->legacy_locks[1]); |
| #endif |
| err = snd_rawmidi_init(&ump->core, card, id, device, |
| output, input, info_flags); |
| if (err < 0) { |
| snd_rawmidi_free(&ump->core); |
| return err; |
| } |
| |
| ump->info.card = card->number; |
| ump->info.device = device; |
| |
| ump->core.private_free = snd_ump_endpoint_free; |
| ump->core.ops = &snd_ump_rawmidi_ops; |
| if (input) |
| snd_rawmidi_set_ops(&ump->core, SNDRV_RAWMIDI_STREAM_INPUT, |
| &snd_ump_rawmidi_input_ops); |
| if (output) |
| snd_rawmidi_set_ops(&ump->core, SNDRV_RAWMIDI_STREAM_OUTPUT, |
| &snd_ump_rawmidi_output_ops); |
| |
| ump_dbg(ump, "Created a UMP EP #%d (%s)\n", device, id); |
| *ump_ret = ump; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_endpoint_new); |
| |
| /* |
| * Device register / unregister hooks; |
| * do nothing, placeholders for avoiding the default rawmidi handling |
| */ |
| |
| #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
| static void snd_ump_dev_seq_free(struct snd_seq_device *device) |
| { |
| struct snd_ump_endpoint *ump = device->private_data; |
| |
| ump->seq_dev = NULL; |
| } |
| #endif |
| |
| static int snd_ump_dev_register(struct snd_rawmidi *rmidi) |
| { |
| #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi); |
| int err; |
| |
| err = snd_seq_device_new(ump->core.card, ump->core.device, |
| SNDRV_SEQ_DEV_ID_UMP, 0, &ump->seq_dev); |
| if (err < 0) |
| return err; |
| ump->seq_dev->private_data = ump; |
| ump->seq_dev->private_free = snd_ump_dev_seq_free; |
| snd_device_register(ump->core.card, ump->seq_dev); |
| #endif |
| return 0; |
| } |
| |
| static int snd_ump_dev_unregister(struct snd_rawmidi *rmidi) |
| { |
| return 0; |
| } |
| |
| static struct snd_ump_block * |
| snd_ump_get_block(struct snd_ump_endpoint *ump, unsigned char id) |
| { |
| struct snd_ump_block *fb; |
| |
| list_for_each_entry(fb, &ump->block_list, list) { |
| if (fb->info.block_id == id) |
| return fb; |
| } |
| return NULL; |
| } |
| |
| /* |
| * rawmidi ops for UMP endpoint |
| */ |
| static int snd_ump_rawmidi_open(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); |
| int dir = substream->stream; |
| int err; |
| |
| if (ump->substreams[dir]) |
| return -EBUSY; |
| err = ump->ops->open(ump, dir); |
| if (err < 0) |
| return err; |
| ump->substreams[dir] = substream; |
| return 0; |
| } |
| |
| static int snd_ump_rawmidi_close(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); |
| int dir = substream->stream; |
| |
| ump->substreams[dir] = NULL; |
| ump->ops->close(ump, dir); |
| return 0; |
| } |
| |
| static void snd_ump_rawmidi_trigger(struct snd_rawmidi_substream *substream, |
| int up) |
| { |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); |
| int dir = substream->stream; |
| |
| ump->ops->trigger(ump, dir, up); |
| } |
| |
| static void snd_ump_rawmidi_drain(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); |
| |
| if (ump->ops->drain) |
| ump->ops->drain(ump, SNDRV_RAWMIDI_STREAM_OUTPUT); |
| } |
| |
| /* number of 32bit words per message type */ |
| static unsigned char ump_packet_words[0x10] = { |
| 1, 1, 1, 2, 2, 4, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4 |
| }; |
| |
| /** |
| * snd_ump_receive_ump_val - parse the UMP packet data |
| * @ump: UMP endpoint |
| * @val: UMP packet data |
| * |
| * The data is copied onto ump->input_buf[]. |
| * When a full packet is completed, returns the number of words (from 1 to 4). |
| * OTOH, if the packet is incomplete, returns 0. |
| */ |
| int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val) |
| { |
| int words; |
| |
| if (!ump->input_pending) |
| ump->input_pending = ump_packet_words[ump_message_type(val)]; |
| |
| ump->input_buf[ump->input_buf_head++] = val; |
| ump->input_pending--; |
| if (!ump->input_pending) { |
| words = ump->input_buf_head; |
| ump->input_buf_head = 0; |
| return words; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_receive_ump_val); |
| |
| /** |
| * snd_ump_receive - transfer UMP packets from the device |
| * @ump: the UMP endpoint |
| * @buffer: the buffer pointer to transfer |
| * @count: byte size to transfer |
| * |
| * Called from the driver to submit the received UMP packets from the device |
| * to user-space. It's essentially a wrapper of rawmidi_receive(). |
| * The data to receive is in CPU-native endianness. |
| */ |
| int snd_ump_receive(struct snd_ump_endpoint *ump, const u32 *buffer, int count) |
| { |
| struct snd_rawmidi_substream *substream; |
| const u32 *p = buffer; |
| int n, words = count >> 2; |
| |
| while (words--) { |
| n = snd_ump_receive_ump_val(ump, *p++); |
| if (!n) |
| continue; |
| ump_handle_stream_msg(ump, ump->input_buf, n); |
| #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
| if (ump->seq_ops) |
| ump->seq_ops->input_receive(ump, ump->input_buf, n); |
| #endif |
| process_legacy_input(ump, ump->input_buf, n); |
| } |
| |
| substream = ump->substreams[SNDRV_RAWMIDI_STREAM_INPUT]; |
| if (!substream) |
| return 0; |
| return snd_rawmidi_receive(substream, (const char *)buffer, count); |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_receive); |
| |
| /** |
| * snd_ump_transmit - transmit UMP packets |
| * @ump: the UMP endpoint |
| * @buffer: the buffer pointer to transfer |
| * @count: byte size to transfer |
| * |
| * Called from the driver to obtain the UMP packets from user-space to the |
| * device. It's essentially a wrapper of rawmidi_transmit(). |
| * The data to transmit is in CPU-native endianness. |
| */ |
| int snd_ump_transmit(struct snd_ump_endpoint *ump, u32 *buffer, int count) |
| { |
| struct snd_rawmidi_substream *substream = |
| ump->substreams[SNDRV_RAWMIDI_STREAM_OUTPUT]; |
| int err; |
| |
| if (!substream) |
| return -ENODEV; |
| err = snd_rawmidi_transmit(substream, (char *)buffer, count); |
| /* received either data or an error? */ |
| if (err) |
| return err; |
| return process_legacy_output(ump, buffer, count); |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_transmit); |
| |
| /** |
| * snd_ump_block_new - Create a UMP block |
| * @ump: UMP object |
| * @blk: block ID number to create |
| * @direction: direction (in/out/bidirection) |
| * @first_group: the first group ID (0-based) |
| * @num_groups: the number of groups in this block |
| * @blk_ret: the pointer to store the resultant block object |
| */ |
| int snd_ump_block_new(struct snd_ump_endpoint *ump, unsigned int blk, |
| unsigned int direction, unsigned int first_group, |
| unsigned int num_groups, struct snd_ump_block **blk_ret) |
| { |
| struct snd_ump_block *fb, *p; |
| |
| if (blk < 0 || blk >= SNDRV_UMP_MAX_BLOCKS) |
| return -EINVAL; |
| |
| if (snd_ump_get_block(ump, blk)) |
| return -EBUSY; |
| |
| fb = kzalloc(sizeof(*fb), GFP_KERNEL); |
| if (!fb) |
| return -ENOMEM; |
| |
| fb->ump = ump; |
| fb->info.card = ump->info.card; |
| fb->info.device = ump->info.device; |
| fb->info.block_id = blk; |
| if (blk >= ump->info.num_blocks) |
| ump->info.num_blocks = blk + 1; |
| fb->info.direction = direction; |
| fb->info.active = 1; |
| fb->info.first_group = first_group; |
| fb->info.num_groups = num_groups; |
| /* fill the default name, may be overwritten to a better name */ |
| snprintf(fb->info.name, sizeof(fb->info.name), "Group %d-%d", |
| first_group + 1, first_group + num_groups); |
| |
| /* put the entry in the ordered list */ |
| list_for_each_entry(p, &ump->block_list, list) { |
| if (p->info.block_id > blk) { |
| list_add_tail(&fb->list, &p->list); |
| goto added; |
| } |
| } |
| list_add_tail(&fb->list, &ump->block_list); |
| |
| added: |
| ump_dbg(ump, "Created a UMP Block #%d (%s)\n", blk, fb->info.name); |
| *blk_ret = fb; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_block_new); |
| |
| static int snd_ump_ioctl_block(struct snd_ump_endpoint *ump, |
| struct snd_ump_block_info __user *argp) |
| { |
| struct snd_ump_block *fb; |
| unsigned char id; |
| |
| if (get_user(id, &argp->block_id)) |
| return -EFAULT; |
| fb = snd_ump_get_block(ump, id); |
| if (!fb) |
| return -ENOENT; |
| if (copy_to_user(argp, &fb->info, sizeof(fb->info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /* |
| * Handle UMP-specific ioctls; called from snd_rawmidi_ioctl() |
| */ |
| static long snd_ump_ioctl(struct snd_rawmidi *rmidi, unsigned int cmd, |
| void __user *argp) |
| { |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi); |
| |
| switch (cmd) { |
| case SNDRV_UMP_IOCTL_ENDPOINT_INFO: |
| if (copy_to_user(argp, &ump->info, sizeof(ump->info))) |
| return -EFAULT; |
| return 0; |
| case SNDRV_UMP_IOCTL_BLOCK_INFO: |
| return snd_ump_ioctl_block(ump, argp); |
| default: |
| ump_dbg(ump, "rawmidi: unknown command = 0x%x\n", cmd); |
| return -ENOTTY; |
| } |
| } |
| |
| static const char *ump_direction_string(int dir) |
| { |
| switch (dir) { |
| case SNDRV_UMP_DIR_INPUT: |
| return "input"; |
| case SNDRV_UMP_DIR_OUTPUT: |
| return "output"; |
| case SNDRV_UMP_DIR_BIDIRECTION: |
| return "bidirection"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| static const char *ump_ui_hint_string(int dir) |
| { |
| switch (dir) { |
| case SNDRV_UMP_BLOCK_UI_HINT_RECEIVER: |
| return "receiver"; |
| case SNDRV_UMP_BLOCK_UI_HINT_SENDER: |
| return "sender"; |
| case SNDRV_UMP_BLOCK_UI_HINT_BOTH: |
| return "both"; |
| default: |
| return "unknown"; |
| } |
| } |
| |
| /* Additional proc file output */ |
| static void snd_ump_proc_read(struct snd_info_entry *entry, |
| struct snd_info_buffer *buffer) |
| { |
| struct snd_rawmidi *rmidi = entry->private_data; |
| struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi); |
| struct snd_ump_block *fb; |
| |
| snd_iprintf(buffer, "EP Name: %s\n", ump->info.name); |
| snd_iprintf(buffer, "EP Product ID: %s\n", ump->info.product_id); |
| snd_iprintf(buffer, "UMP Version: 0x%04x\n", ump->info.version); |
| snd_iprintf(buffer, "Protocol Caps: 0x%08x\n", ump->info.protocol_caps); |
| snd_iprintf(buffer, "Protocol: 0x%08x\n", ump->info.protocol); |
| if (ump->info.version) { |
| snd_iprintf(buffer, "Manufacturer ID: 0x%08x\n", |
| ump->info.manufacturer_id); |
| snd_iprintf(buffer, "Family ID: 0x%04x\n", ump->info.family_id); |
| snd_iprintf(buffer, "Model ID: 0x%04x\n", ump->info.model_id); |
| snd_iprintf(buffer, "SW Revision: 0x%02x%02x%02x%02x\n", |
| ump->info.sw_revision[0], |
| ump->info.sw_revision[1], |
| ump->info.sw_revision[2], |
| ump->info.sw_revision[3]); |
| } |
| snd_iprintf(buffer, "Static Blocks: %s\n", |
| (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS) ? "Yes" : "No"); |
| snd_iprintf(buffer, "Num Blocks: %d\n\n", ump->info.num_blocks); |
| |
| list_for_each_entry(fb, &ump->block_list, list) { |
| snd_iprintf(buffer, "Block %d (%s)\n", fb->info.block_id, |
| fb->info.name); |
| snd_iprintf(buffer, " Direction: %s\n", |
| ump_direction_string(fb->info.direction)); |
| snd_iprintf(buffer, " Active: %s\n", |
| fb->info.active ? "Yes" : "No"); |
| snd_iprintf(buffer, " Groups: %d-%d\n", |
| fb->info.first_group + 1, |
| fb->info.first_group + fb->info.num_groups); |
| snd_iprintf(buffer, " Is MIDI1: %s%s\n", |
| (fb->info.flags & SNDRV_UMP_BLOCK_IS_MIDI1) ? "Yes" : "No", |
| (fb->info.flags & SNDRV_UMP_BLOCK_IS_LOWSPEED) ? " (Low Speed)" : ""); |
| if (ump->info.version) { |
| snd_iprintf(buffer, " MIDI-CI Version: %d\n", |
| fb->info.midi_ci_version); |
| snd_iprintf(buffer, " Sysex8 Streams: %d\n", |
| fb->info.sysex8_streams); |
| snd_iprintf(buffer, " UI Hint: %s\n", |
| ump_ui_hint_string(fb->info.ui_hint)); |
| } |
| snd_iprintf(buffer, "\n"); |
| } |
| } |
| |
| /* |
| * UMP endpoint and function block handling |
| */ |
| |
| /* open / close UMP streams for the internal stream msg communication */ |
| static int ump_request_open(struct snd_ump_endpoint *ump) |
| { |
| return snd_rawmidi_kernel_open(&ump->core, 0, |
| SNDRV_RAWMIDI_LFLG_OUTPUT, |
| &ump->stream_rfile); |
| } |
| |
| static void ump_request_close(struct snd_ump_endpoint *ump) |
| { |
| snd_rawmidi_kernel_release(&ump->stream_rfile); |
| } |
| |
| /* request a command and wait for the given response; |
| * @req1 and @req2 are u32 commands |
| * @reply is the expected UMP stream status |
| */ |
| static int ump_req_msg(struct snd_ump_endpoint *ump, u32 req1, u32 req2, |
| u32 reply) |
| { |
| u32 buf[4]; |
| |
| ump_dbg(ump, "%s: request %08x %08x, wait-for %08x\n", |
| __func__, req1, req2, reply); |
| memset(buf, 0, sizeof(buf)); |
| buf[0] = req1; |
| buf[1] = req2; |
| ump->stream_finished = 0; |
| ump->stream_wait_for = reply; |
| snd_rawmidi_kernel_write(ump->stream_rfile.output, |
| (unsigned char *)&buf, 16); |
| wait_event_timeout(ump->stream_wait, ump->stream_finished, |
| msecs_to_jiffies(500)); |
| if (!READ_ONCE(ump->stream_finished)) { |
| ump_dbg(ump, "%s: request timed out\n", __func__); |
| return -ETIMEDOUT; |
| } |
| ump->stream_finished = 0; |
| ump_dbg(ump, "%s: reply: %08x %08x %08x %08x\n", |
| __func__, buf[0], buf[1], buf[2], buf[3]); |
| return 0; |
| } |
| |
| /* append the received letters via UMP packet to the given string buffer; |
| * return 1 if the full string is received or 0 to continue |
| */ |
| static int ump_append_string(struct snd_ump_endpoint *ump, char *dest, |
| int maxsize, const u32 *buf, int offset) |
| { |
| unsigned char format; |
| int c; |
| |
| format = ump_stream_message_format(buf[0]); |
| if (format == UMP_STREAM_MSG_FORMAT_SINGLE || |
| format == UMP_STREAM_MSG_FORMAT_START) { |
| c = 0; |
| } else { |
| c = strlen(dest); |
| if (c >= maxsize - 1) |
| return 1; |
| } |
| |
| for (; offset < 16; offset++) { |
| dest[c] = buf[offset / 4] >> (3 - (offset % 4)) * 8; |
| if (!dest[c]) |
| break; |
| if (++c >= maxsize - 1) |
| break; |
| } |
| dest[c] = 0; |
| return (format == UMP_STREAM_MSG_FORMAT_SINGLE || |
| format == UMP_STREAM_MSG_FORMAT_END); |
| } |
| |
| /* handle EP info stream message; update the UMP attributes */ |
| static int ump_handle_ep_info_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| ump->info.version = (buf->ep_info.ump_version_major << 8) | |
| buf->ep_info.ump_version_minor; |
| ump->info.num_blocks = buf->ep_info.num_function_blocks; |
| if (ump->info.num_blocks > SNDRV_UMP_MAX_BLOCKS) { |
| ump_info(ump, "Invalid function blocks %d, fallback to 1\n", |
| ump->info.num_blocks); |
| ump->info.num_blocks = 1; |
| } |
| |
| if (buf->ep_info.static_function_block) |
| ump->info.flags |= SNDRV_UMP_EP_INFO_STATIC_BLOCKS; |
| |
| ump->info.protocol_caps = (buf->ep_info.protocol << 8) | |
| buf->ep_info.jrts; |
| |
| ump_dbg(ump, "EP info: version=%x, num_blocks=%x, proto_caps=%x\n", |
| ump->info.version, ump->info.num_blocks, ump->info.protocol_caps); |
| return 1; /* finished */ |
| } |
| |
| /* handle EP device info stream message; update the UMP attributes */ |
| static int ump_handle_device_info_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| ump->info.manufacturer_id = buf->device_info.manufacture_id & 0x7f7f7f; |
| ump->info.family_id = (buf->device_info.family_msb << 8) | |
| buf->device_info.family_lsb; |
| ump->info.model_id = (buf->device_info.model_msb << 8) | |
| buf->device_info.model_lsb; |
| ump->info.sw_revision[0] = (buf->device_info.sw_revision >> 24) & 0x7f; |
| ump->info.sw_revision[1] = (buf->device_info.sw_revision >> 16) & 0x7f; |
| ump->info.sw_revision[2] = (buf->device_info.sw_revision >> 8) & 0x7f; |
| ump->info.sw_revision[3] = buf->device_info.sw_revision & 0x7f; |
| ump_dbg(ump, "EP devinfo: manid=%08x, family=%04x, model=%04x, sw=%02x%02x%02x%02x\n", |
| ump->info.manufacturer_id, |
| ump->info.family_id, |
| ump->info.model_id, |
| ump->info.sw_revision[0], |
| ump->info.sw_revision[1], |
| ump->info.sw_revision[2], |
| ump->info.sw_revision[3]); |
| return 1; /* finished */ |
| } |
| |
| /* handle EP name stream message; update the UMP name string */ |
| static int ump_handle_ep_name_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| return ump_append_string(ump, ump->info.name, sizeof(ump->info.name), |
| buf->raw, 2); |
| } |
| |
| /* handle EP product id stream message; update the UMP product_id string */ |
| static int ump_handle_product_id_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| return ump_append_string(ump, ump->info.product_id, |
| sizeof(ump->info.product_id), |
| buf->raw, 2); |
| } |
| |
| /* notify the protocol change to sequencer */ |
| static void seq_notify_protocol(struct snd_ump_endpoint *ump) |
| { |
| #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
| if (ump->seq_ops && ump->seq_ops->switch_protocol) |
| ump->seq_ops->switch_protocol(ump); |
| #endif /* CONFIG_SND_SEQUENCER */ |
| } |
| |
| /** |
| * snd_ump_switch_protocol - switch MIDI protocol |
| * @ump: UMP endpoint |
| * @protocol: protocol to switch to |
| * |
| * Returns 1 if the protocol is actually switched, 0 if unchanged |
| */ |
| int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol) |
| { |
| unsigned int type; |
| |
| protocol &= ump->info.protocol_caps; |
| if (protocol == ump->info.protocol) |
| return 0; |
| |
| type = protocol & SNDRV_UMP_EP_INFO_PROTO_MIDI_MASK; |
| if (type != SNDRV_UMP_EP_INFO_PROTO_MIDI1 && |
| type != SNDRV_UMP_EP_INFO_PROTO_MIDI2) |
| return 0; |
| |
| ump->info.protocol = protocol; |
| ump_dbg(ump, "New protocol = %x (caps = %x)\n", |
| protocol, ump->info.protocol_caps); |
| seq_notify_protocol(ump); |
| return 1; |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_switch_protocol); |
| |
| /* handle EP stream config message; update the UMP protocol */ |
| static int ump_handle_stream_cfg_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| unsigned int protocol = |
| (buf->stream_cfg.protocol << 8) | buf->stream_cfg.jrts; |
| |
| snd_ump_switch_protocol(ump, protocol); |
| return 1; /* finished */ |
| } |
| |
| /* Extract Function Block info from UMP packet */ |
| static void fill_fb_info(struct snd_ump_endpoint *ump, |
| struct snd_ump_block_info *info, |
| const union snd_ump_stream_msg *buf) |
| { |
| info->direction = buf->fb_info.direction; |
| info->ui_hint = buf->fb_info.ui_hint; |
| info->first_group = buf->fb_info.first_group; |
| info->num_groups = buf->fb_info.num_groups; |
| info->flags = buf->fb_info.midi_10; |
| info->active = buf->fb_info.active; |
| info->midi_ci_version = buf->fb_info.midi_ci_version; |
| info->sysex8_streams = buf->fb_info.sysex8_streams; |
| |
| ump_dbg(ump, "FB %d: dir=%d, active=%d, first_gp=%d, num_gp=%d, midici=%d, sysex8=%d, flags=0x%x\n", |
| info->block_id, info->direction, info->active, |
| info->first_group, info->num_groups, info->midi_ci_version, |
| info->sysex8_streams, info->flags); |
| |
| if ((info->flags & SNDRV_UMP_BLOCK_IS_MIDI1) && info->num_groups != 1) { |
| info->num_groups = 1; |
| ump_dbg(ump, "FB %d: corrected groups to 1 for MIDI1\n", |
| info->block_id); |
| } |
| } |
| |
| /* check whether the FB info gets updated by the current message */ |
| static bool is_fb_info_updated(struct snd_ump_endpoint *ump, |
| struct snd_ump_block *fb, |
| const union snd_ump_stream_msg *buf) |
| { |
| char tmpbuf[offsetof(struct snd_ump_block_info, name)]; |
| |
| if (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS) { |
| ump_info(ump, "Skipping static FB info update (blk#%d)\n", |
| fb->info.block_id); |
| return 0; |
| } |
| |
| memcpy(tmpbuf, &fb->info, sizeof(tmpbuf)); |
| fill_fb_info(ump, (struct snd_ump_block_info *)tmpbuf, buf); |
| return memcmp(&fb->info, tmpbuf, sizeof(tmpbuf)) != 0; |
| } |
| |
| /* notify the FB info/name change to sequencer */ |
| static void seq_notify_fb_change(struct snd_ump_endpoint *ump, |
| struct snd_ump_block *fb) |
| { |
| #if IS_ENABLED(CONFIG_SND_SEQUENCER) |
| if (ump->seq_ops && ump->seq_ops->notify_fb_change) |
| ump->seq_ops->notify_fb_change(ump, fb); |
| #endif |
| } |
| |
| /* handle FB info message; update FB info if the block is present */ |
| static int ump_handle_fb_info_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| unsigned char blk; |
| struct snd_ump_block *fb; |
| |
| blk = buf->fb_info.function_block_id; |
| fb = snd_ump_get_block(ump, blk); |
| |
| /* complain only if updated after parsing */ |
| if (!fb && ump->parsed) { |
| ump_info(ump, "Function Block Info Update for non-existing block %d\n", |
| blk); |
| return -ENODEV; |
| } |
| |
| /* When updated after the initial parse, check the FB info update */ |
| if (ump->parsed && !is_fb_info_updated(ump, fb, buf)) |
| return 1; /* no content change */ |
| |
| if (fb) { |
| fill_fb_info(ump, &fb->info, buf); |
| if (ump->parsed) |
| seq_notify_fb_change(ump, fb); |
| } |
| |
| return 1; /* finished */ |
| } |
| |
| /* handle FB name message; update the FB name string */ |
| static int ump_handle_fb_name_msg(struct snd_ump_endpoint *ump, |
| const union snd_ump_stream_msg *buf) |
| { |
| unsigned char blk; |
| struct snd_ump_block *fb; |
| int ret; |
| |
| blk = buf->fb_name.function_block_id; |
| fb = snd_ump_get_block(ump, blk); |
| if (!fb) |
| return -ENODEV; |
| |
| if (ump->parsed && |
| (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS)) { |
| ump_dbg(ump, "Skipping static FB name update (blk#%d)\n", |
| fb->info.block_id); |
| return 0; |
| } |
| |
| ret = ump_append_string(ump, fb->info.name, sizeof(fb->info.name), |
| buf->raw, 3); |
| /* notify the FB name update to sequencer, too */ |
| if (ret > 0 && ump->parsed) |
| seq_notify_fb_change(ump, fb); |
| return ret; |
| } |
| |
| static int create_block_from_fb_info(struct snd_ump_endpoint *ump, int blk) |
| { |
| struct snd_ump_block *fb; |
| unsigned char direction, first_group, num_groups; |
| const union snd_ump_stream_msg *buf = |
| (const union snd_ump_stream_msg *)ump->input_buf; |
| u32 msg; |
| int err; |
| |
| /* query the FB info once */ |
| msg = ump_stream_compose(UMP_STREAM_MSG_STATUS_FB_DISCOVERY, 0) | |
| (blk << 8) | UMP_STREAM_MSG_REQUEST_FB_INFO; |
| err = ump_req_msg(ump, msg, 0, UMP_STREAM_MSG_STATUS_FB_INFO); |
| if (err < 0) { |
| ump_dbg(ump, "Unable to get FB info for block %d\n", blk); |
| return err; |
| } |
| |
| /* the last input must be the FB info */ |
| if (buf->fb_info.status != UMP_STREAM_MSG_STATUS_FB_INFO) { |
| ump_dbg(ump, "Inconsistent input: 0x%x\n", *buf->raw); |
| return -EINVAL; |
| } |
| |
| direction = buf->fb_info.direction; |
| first_group = buf->fb_info.first_group; |
| num_groups = buf->fb_info.num_groups; |
| |
| err = snd_ump_block_new(ump, blk, direction, first_group, num_groups, |
| &fb); |
| if (err < 0) |
| return err; |
| |
| fill_fb_info(ump, &fb->info, buf); |
| |
| msg = ump_stream_compose(UMP_STREAM_MSG_STATUS_FB_DISCOVERY, 0) | |
| (blk << 8) | UMP_STREAM_MSG_REQUEST_FB_NAME; |
| err = ump_req_msg(ump, msg, 0, UMP_STREAM_MSG_STATUS_FB_NAME); |
| if (err) |
| ump_dbg(ump, "Unable to get UMP FB name string #%d\n", blk); |
| |
| return 0; |
| } |
| |
| /* handle stream messages, called from snd_ump_receive() */ |
| static void ump_handle_stream_msg(struct snd_ump_endpoint *ump, |
| const u32 *buf, int size) |
| { |
| const union snd_ump_stream_msg *msg; |
| unsigned int status; |
| int ret; |
| |
| /* UMP stream message suppressed (for gadget UMP)? */ |
| if (ump->no_process_stream) |
| return; |
| |
| BUILD_BUG_ON(sizeof(*msg) != 16); |
| ump_dbg(ump, "Stream msg: %08x %08x %08x %08x\n", |
| buf[0], buf[1], buf[2], buf[3]); |
| |
| if (size != 4 || ump_message_type(*buf) != UMP_MSG_TYPE_STREAM) |
| return; |
| |
| msg = (const union snd_ump_stream_msg *)buf; |
| status = ump_stream_message_status(*buf); |
| switch (status) { |
| case UMP_STREAM_MSG_STATUS_EP_INFO: |
| ret = ump_handle_ep_info_msg(ump, msg); |
| break; |
| case UMP_STREAM_MSG_STATUS_DEVICE_INFO: |
| ret = ump_handle_device_info_msg(ump, msg); |
| break; |
| case UMP_STREAM_MSG_STATUS_EP_NAME: |
| ret = ump_handle_ep_name_msg(ump, msg); |
| break; |
| case UMP_STREAM_MSG_STATUS_PRODUCT_ID: |
| ret = ump_handle_product_id_msg(ump, msg); |
| break; |
| case UMP_STREAM_MSG_STATUS_STREAM_CFG: |
| ret = ump_handle_stream_cfg_msg(ump, msg); |
| break; |
| case UMP_STREAM_MSG_STATUS_FB_INFO: |
| ret = ump_handle_fb_info_msg(ump, msg); |
| break; |
| case UMP_STREAM_MSG_STATUS_FB_NAME: |
| ret = ump_handle_fb_name_msg(ump, msg); |
| break; |
| default: |
| return; |
| } |
| |
| /* when the message has been processed fully, wake up */ |
| if (ret > 0 && ump->stream_wait_for == status) { |
| WRITE_ONCE(ump->stream_finished, 1); |
| wake_up(&ump->stream_wait); |
| } |
| } |
| |
| /** |
| * snd_ump_parse_endpoint - parse endpoint and create function blocks |
| * @ump: UMP object |
| * |
| * Returns 0 for successful parse, -ENODEV if device doesn't respond |
| * (or the query is unsupported), or other error code for serious errors. |
| */ |
| int snd_ump_parse_endpoint(struct snd_ump_endpoint *ump) |
| { |
| int blk, err; |
| u32 msg; |
| |
| if (!(ump->core.info_flags & SNDRV_RAWMIDI_INFO_DUPLEX)) |
| return -ENODEV; |
| |
| err = ump_request_open(ump); |
| if (err < 0) { |
| ump_dbg(ump, "Unable to open rawmidi device: %d\n", err); |
| return err; |
| } |
| |
| /* Check Endpoint Information */ |
| msg = ump_stream_compose(UMP_STREAM_MSG_STATUS_EP_DISCOVERY, 0) | |
| 0x0101; /* UMP version 1.1 */ |
| err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_EP_INFO, |
| UMP_STREAM_MSG_STATUS_EP_INFO); |
| if (err < 0) { |
| ump_dbg(ump, "Unable to get UMP EP info\n"); |
| goto error; |
| } |
| |
| /* Request Endpoint Device Info */ |
| err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_DEVICE_INFO, |
| UMP_STREAM_MSG_STATUS_DEVICE_INFO); |
| if (err < 0) |
| ump_dbg(ump, "Unable to get UMP EP device info\n"); |
| |
| /* Request Endpoint Name */ |
| err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_EP_NAME, |
| UMP_STREAM_MSG_STATUS_EP_NAME); |
| if (err < 0) |
| ump_dbg(ump, "Unable to get UMP EP name string\n"); |
| |
| /* Request Endpoint Product ID */ |
| err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_PRODUCT_ID, |
| UMP_STREAM_MSG_STATUS_PRODUCT_ID); |
| if (err < 0) |
| ump_dbg(ump, "Unable to get UMP EP product ID string\n"); |
| |
| /* Get the current stream configuration */ |
| err = ump_req_msg(ump, msg, UMP_STREAM_MSG_REQUEST_STREAM_CFG, |
| UMP_STREAM_MSG_STATUS_STREAM_CFG); |
| if (err < 0) |
| ump_dbg(ump, "Unable to get UMP EP stream config\n"); |
| |
| /* If no protocol is set by some reason, assume the valid one */ |
| if (!(ump->info.protocol & SNDRV_UMP_EP_INFO_PROTO_MIDI_MASK)) { |
| if (ump->info.protocol_caps & SNDRV_UMP_EP_INFO_PROTO_MIDI2) |
| ump->info.protocol |= SNDRV_UMP_EP_INFO_PROTO_MIDI2; |
| else if (ump->info.protocol_caps & SNDRV_UMP_EP_INFO_PROTO_MIDI1) |
| ump->info.protocol |= SNDRV_UMP_EP_INFO_PROTO_MIDI1; |
| } |
| |
| /* Query and create blocks from Function Blocks */ |
| for (blk = 0; blk < ump->info.num_blocks; blk++) { |
| err = create_block_from_fb_info(ump, blk); |
| if (err < 0) |
| continue; |
| } |
| |
| error: |
| ump->parsed = true; |
| ump_request_close(ump); |
| if (err == -ETIMEDOUT) |
| err = -ENODEV; |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_parse_endpoint); |
| |
| #if IS_ENABLED(CONFIG_SND_UMP_LEGACY_RAWMIDI) |
| /* |
| * Legacy rawmidi support |
| */ |
| static int snd_ump_legacy_open(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_ump_endpoint *ump = substream->rmidi->private_data; |
| int dir = substream->stream; |
| int group = ump->legacy_mapping[substream->number]; |
| int err; |
| |
| guard(mutex)(&ump->open_mutex); |
| if (ump->legacy_substreams[dir][group]) |
| return -EBUSY; |
| if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) { |
| if (!ump->legacy_out_opens) { |
| err = snd_rawmidi_kernel_open(&ump->core, 0, |
| SNDRV_RAWMIDI_LFLG_OUTPUT | |
| SNDRV_RAWMIDI_LFLG_APPEND, |
| &ump->legacy_out_rfile); |
| if (err < 0) |
| return err; |
| } |
| ump->legacy_out_opens++; |
| snd_ump_convert_reset(&ump->out_cvts[group]); |
| } |
| guard(spinlock_irq)(&ump->legacy_locks[dir]); |
| ump->legacy_substreams[dir][group] = substream; |
| return 0; |
| } |
| |
| static int snd_ump_legacy_close(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_ump_endpoint *ump = substream->rmidi->private_data; |
| int dir = substream->stream; |
| int group = ump->legacy_mapping[substream->number]; |
| |
| guard(mutex)(&ump->open_mutex); |
| scoped_guard(spinlock_irq, &ump->legacy_locks[dir]) |
| ump->legacy_substreams[dir][group] = NULL; |
| if (dir == SNDRV_RAWMIDI_STREAM_OUTPUT) { |
| if (!--ump->legacy_out_opens) |
| snd_rawmidi_kernel_release(&ump->legacy_out_rfile); |
| } |
| return 0; |
| } |
| |
| static void snd_ump_legacy_trigger(struct snd_rawmidi_substream *substream, |
| int up) |
| { |
| struct snd_ump_endpoint *ump = substream->rmidi->private_data; |
| int dir = substream->stream; |
| |
| ump->ops->trigger(ump, dir, up); |
| } |
| |
| static void snd_ump_legacy_drain(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_ump_endpoint *ump = substream->rmidi->private_data; |
| |
| if (ump->ops->drain) |
| ump->ops->drain(ump, SNDRV_RAWMIDI_STREAM_OUTPUT); |
| } |
| |
| static int snd_ump_legacy_dev_register(struct snd_rawmidi *rmidi) |
| { |
| /* dummy, just for avoiding create superfluous seq clients */ |
| return 0; |
| } |
| |
| static const struct snd_rawmidi_ops snd_ump_legacy_input_ops = { |
| .open = snd_ump_legacy_open, |
| .close = snd_ump_legacy_close, |
| .trigger = snd_ump_legacy_trigger, |
| }; |
| |
| static const struct snd_rawmidi_ops snd_ump_legacy_output_ops = { |
| .open = snd_ump_legacy_open, |
| .close = snd_ump_legacy_close, |
| .trigger = snd_ump_legacy_trigger, |
| .drain = snd_ump_legacy_drain, |
| }; |
| |
| static const struct snd_rawmidi_global_ops snd_ump_legacy_ops = { |
| .dev_register = snd_ump_legacy_dev_register, |
| }; |
| |
| static int process_legacy_output(struct snd_ump_endpoint *ump, |
| u32 *buffer, int count) |
| { |
| struct snd_rawmidi_substream *substream; |
| struct ump_cvt_to_ump *ctx; |
| const int dir = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| unsigned char c; |
| int group, size = 0; |
| |
| if (!ump->out_cvts || !ump->legacy_out_opens) |
| return 0; |
| |
| guard(spinlock_irqsave)(&ump->legacy_locks[dir]); |
| for (group = 0; group < SNDRV_UMP_MAX_GROUPS; group++) { |
| substream = ump->legacy_substreams[dir][group]; |
| if (!substream) |
| continue; |
| ctx = &ump->out_cvts[group]; |
| while (!ctx->ump_bytes && |
| snd_rawmidi_transmit(substream, &c, 1) > 0) |
| snd_ump_convert_to_ump(ctx, group, ump->info.protocol, c); |
| if (ctx->ump_bytes && ctx->ump_bytes <= count) { |
| size = ctx->ump_bytes; |
| memcpy(buffer, ctx->ump, size); |
| ctx->ump_bytes = 0; |
| break; |
| } |
| } |
| return size; |
| } |
| |
| static void process_legacy_input(struct snd_ump_endpoint *ump, const u32 *src, |
| int words) |
| { |
| struct snd_rawmidi_substream *substream; |
| unsigned char buf[16]; |
| unsigned char group; |
| const int dir = SNDRV_RAWMIDI_STREAM_INPUT; |
| int size; |
| |
| size = snd_ump_convert_from_ump(src, buf, &group); |
| if (size <= 0) |
| return; |
| guard(spinlock_irqsave)(&ump->legacy_locks[dir]); |
| substream = ump->legacy_substreams[dir][group]; |
| if (substream) |
| snd_rawmidi_receive(substream, buf, size); |
| } |
| |
| /* Fill ump->legacy_mapping[] for groups to be used for legacy rawmidi */ |
| static int fill_legacy_mapping(struct snd_ump_endpoint *ump) |
| { |
| struct snd_ump_block *fb; |
| unsigned int group_maps = 0; |
| int i, num; |
| |
| if (ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS) { |
| list_for_each_entry(fb, &ump->block_list, list) { |
| for (i = 0; i < fb->info.num_groups; i++) |
| group_maps |= 1U << (fb->info.first_group + i); |
| } |
| if (!group_maps) |
| ump_info(ump, "No UMP Group is found in FB\n"); |
| } |
| |
| /* use all groups for non-static case */ |
| if (!group_maps) |
| group_maps = (1U << SNDRV_UMP_MAX_GROUPS) - 1; |
| |
| num = 0; |
| for (i = 0; i < SNDRV_UMP_MAX_GROUPS; i++) |
| if (group_maps & (1U << i)) |
| ump->legacy_mapping[num++] = i; |
| |
| return num; |
| } |
| |
| static void fill_substream_names(struct snd_ump_endpoint *ump, |
| struct snd_rawmidi *rmidi, int dir) |
| { |
| struct snd_rawmidi_substream *s; |
| |
| list_for_each_entry(s, &rmidi->streams[dir].substreams, list) |
| snprintf(s->name, sizeof(s->name), "Group %d (%.16s)", |
| ump->legacy_mapping[s->number] + 1, ump->info.name); |
| } |
| |
| int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, |
| char *id, int device) |
| { |
| struct snd_rawmidi *rmidi; |
| bool input, output; |
| int err, num; |
| |
| ump->out_cvts = kcalloc(SNDRV_UMP_MAX_GROUPS, |
| sizeof(*ump->out_cvts), GFP_KERNEL); |
| if (!ump->out_cvts) |
| return -ENOMEM; |
| |
| num = fill_legacy_mapping(ump); |
| |
| input = ump->core.info_flags & SNDRV_RAWMIDI_INFO_INPUT; |
| output = ump->core.info_flags & SNDRV_RAWMIDI_INFO_OUTPUT; |
| err = snd_rawmidi_new(ump->core.card, id, device, |
| output ? num : 0, input ? num : 0, |
| &rmidi); |
| if (err < 0) { |
| kfree(ump->out_cvts); |
| return err; |
| } |
| |
| if (input) |
| snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
| &snd_ump_legacy_input_ops); |
| if (output) |
| snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, |
| &snd_ump_legacy_output_ops); |
| snprintf(rmidi->name, sizeof(rmidi->name), "%.68s (MIDI 1.0)", |
| ump->info.name); |
| rmidi->info_flags = ump->core.info_flags & ~SNDRV_RAWMIDI_INFO_UMP; |
| rmidi->ops = &snd_ump_legacy_ops; |
| rmidi->private_data = ump; |
| ump->legacy_rmidi = rmidi; |
| if (input) |
| fill_substream_names(ump, rmidi, SNDRV_RAWMIDI_STREAM_INPUT); |
| if (output) |
| fill_substream_names(ump, rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT); |
| |
| ump_dbg(ump, "Created a legacy rawmidi #%d (%s)\n", device, id); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_ump_attach_legacy_rawmidi); |
| #endif /* CONFIG_SND_UMP_LEGACY_RAWMIDI */ |
| |
| MODULE_DESCRIPTION("Universal MIDI Packet (UMP) Core Driver"); |
| MODULE_LICENSE("GPL"); |