Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Generic MIDI synth driver for ALSA sequencer |
| 3 | * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 4 | * Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | Possible options for midisynth module: |
| 24 | - automatic opening of midi ports on first received event or subscription |
| 25 | (close will be performed when client leaves) |
| 26 | */ |
| 27 | |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/init.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/errno.h> |
| 32 | #include <linux/string.h> |
Paul Gortmaker | 65a7721 | 2011-07-15 13:13:37 -0400 | [diff] [blame] | 33 | #include <linux/module.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 34 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <sound/core.h> |
| 36 | #include <sound/rawmidi.h> |
| 37 | #include <sound/seq_kernel.h> |
| 38 | #include <sound/seq_device.h> |
| 39 | #include <sound/seq_midi_event.h> |
| 40 | #include <sound/initval.h> |
| 41 | |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 42 | MODULE_AUTHOR("Frank van de Pol <fvdpol@coil.demon.nl>, Jaroslav Kysela <perex@perex.cz>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | MODULE_DESCRIPTION("Advanced Linux Sound Architecture sequencer MIDI synth."); |
| 44 | MODULE_LICENSE("GPL"); |
| 45 | static int output_buffer_size = PAGE_SIZE; |
| 46 | module_param(output_buffer_size, int, 0644); |
| 47 | MODULE_PARM_DESC(output_buffer_size, "Output buffer size in bytes."); |
| 48 | static int input_buffer_size = PAGE_SIZE; |
| 49 | module_param(input_buffer_size, int, 0644); |
| 50 | MODULE_PARM_DESC(input_buffer_size, "Input buffer size in bytes."); |
| 51 | |
| 52 | /* data for this midi synth driver */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 53 | struct seq_midisynth { |
| 54 | struct snd_card *card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | int device; |
| 56 | int subdevice; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 57 | struct snd_rawmidi_file input_rfile; |
| 58 | struct snd_rawmidi_file output_rfile; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | int seq_client; |
| 60 | int seq_port; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 61 | struct snd_midi_event *parser; |
| 62 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 64 | struct seq_midisynth_client { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | int seq_client; |
| 66 | int num_ports; |
| 67 | int ports_per_device[SNDRV_RAWMIDI_DEVICES]; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 68 | struct seq_midisynth *ports[SNDRV_RAWMIDI_DEVICES]; |
| 69 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 71 | static struct seq_midisynth_client *synths[SNDRV_CARDS]; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 72 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | /* handle rawmidi input event (MIDI v1.0 stream) */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 75 | static void snd_midi_input_event(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 77 | struct snd_rawmidi_runtime *runtime; |
| 78 | struct seq_midisynth *msynth; |
| 79 | struct snd_seq_event ev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | char buf[16], *pbuf; |
| 81 | long res, count; |
| 82 | |
| 83 | if (substream == NULL) |
| 84 | return; |
| 85 | runtime = substream->runtime; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 86 | msynth = runtime->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | if (msynth == NULL) |
| 88 | return; |
| 89 | memset(&ev, 0, sizeof(ev)); |
| 90 | while (runtime->avail > 0) { |
| 91 | res = snd_rawmidi_kernel_read(substream, buf, sizeof(buf)); |
| 92 | if (res <= 0) |
| 93 | continue; |
| 94 | if (msynth->parser == NULL) |
| 95 | continue; |
| 96 | pbuf = buf; |
| 97 | while (res > 0) { |
| 98 | count = snd_midi_event_encode(msynth->parser, pbuf, res, &ev); |
| 99 | if (count < 0) |
| 100 | break; |
| 101 | pbuf += count; |
| 102 | res -= count; |
| 103 | if (ev.type != SNDRV_SEQ_EVENT_NONE) { |
| 104 | ev.source.port = msynth->seq_port; |
| 105 | ev.dest.client = SNDRV_SEQ_ADDRESS_SUBSCRIBERS; |
| 106 | snd_seq_kernel_client_dispatch(msynth->seq_client, &ev, 1, 0); |
| 107 | /* clear event and reset header */ |
| 108 | memset(&ev, 0, sizeof(ev)); |
| 109 | } |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 114 | static int dump_midi(struct snd_rawmidi_substream *substream, const char *buf, int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 116 | struct snd_rawmidi_runtime *runtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | int tmp; |
| 118 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 119 | if (snd_BUG_ON(!substream || !buf)) |
| 120 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | runtime = substream->runtime; |
| 122 | if ((tmp = runtime->avail) < count) { |
Clemens Ladisch | f907ed9 | 2009-07-13 13:30:22 +0200 | [diff] [blame] | 123 | if (printk_ratelimit()) |
| 124 | snd_printk(KERN_ERR "MIDI output buffer overrun\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | return -ENOMEM; |
| 126 | } |
| 127 | if (snd_rawmidi_kernel_write(substream, buf, count) < count) |
| 128 | return -EINVAL; |
| 129 | return 0; |
| 130 | } |
| 131 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 132 | static int event_process_midi(struct snd_seq_event *ev, int direct, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | void *private_data, int atomic, int hop) |
| 134 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 135 | struct seq_midisynth *msynth = private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | unsigned char msg[10]; /* buffer for constructing midi messages */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 137 | struct snd_rawmidi_substream *substream; |
Clemens Ladisch | d06e4c4 | 2005-07-21 08:01:22 +0200 | [diff] [blame] | 138 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 140 | if (snd_BUG_ON(!msynth)) |
| 141 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | substream = msynth->output_rfile.output; |
| 143 | if (substream == NULL) |
| 144 | return -ENODEV; |
| 145 | if (ev->type == SNDRV_SEQ_EVENT_SYSEX) { /* special case, to save space */ |
| 146 | if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) { |
| 147 | /* invalid event */ |
| 148 | snd_printd("seq_midi: invalid sysex event flags = 0x%x\n", ev->flags); |
| 149 | return 0; |
| 150 | } |
Clemens Ladisch | d06e4c4 | 2005-07-21 08:01:22 +0200 | [diff] [blame] | 151 | snd_seq_dump_var_event(ev, (snd_seq_dump_func_t)dump_midi, substream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | snd_midi_event_reset_decode(msynth->parser); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } else { |
| 154 | if (msynth->parser == NULL) |
| 155 | return -EIO; |
Clemens Ladisch | d06e4c4 | 2005-07-21 08:01:22 +0200 | [diff] [blame] | 156 | len = snd_midi_event_decode(msynth->parser, msg, sizeof(msg), ev); |
| 157 | if (len < 0) |
| 158 | return 0; |
| 159 | if (dump_midi(substream, msg, len) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | snd_midi_event_reset_decode(msynth->parser); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 166 | static int snd_seq_midisynth_new(struct seq_midisynth *msynth, |
| 167 | struct snd_card *card, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | int device, |
| 169 | int subdevice) |
| 170 | { |
| 171 | if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &msynth->parser) < 0) |
| 172 | return -ENOMEM; |
| 173 | msynth->card = card; |
| 174 | msynth->device = device; |
| 175 | msynth->subdevice = subdevice; |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | /* open associated midi device for input */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 180 | static int midisynth_subscribe(void *private_data, struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { |
| 182 | int err; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 183 | struct seq_midisynth *msynth = private_data; |
| 184 | struct snd_rawmidi_runtime *runtime; |
| 185 | struct snd_rawmidi_params params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | /* open midi port */ |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 188 | if ((err = snd_rawmidi_kernel_open(msynth->card, msynth->device, |
| 189 | msynth->subdevice, |
| 190 | SNDRV_RAWMIDI_LFLG_INPUT, |
| 191 | &msynth->input_rfile)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | snd_printd("midi input open failed!!!\n"); |
| 193 | return err; |
| 194 | } |
| 195 | runtime = msynth->input_rfile.input->runtime; |
| 196 | memset(¶ms, 0, sizeof(params)); |
| 197 | params.avail_min = 1; |
| 198 | params.buffer_size = input_buffer_size; |
| 199 | if ((err = snd_rawmidi_input_params(msynth->input_rfile.input, ¶ms)) < 0) { |
| 200 | snd_rawmidi_kernel_release(&msynth->input_rfile); |
| 201 | return err; |
| 202 | } |
| 203 | snd_midi_event_reset_encode(msynth->parser); |
| 204 | runtime->event = snd_midi_input_event; |
| 205 | runtime->private_data = msynth; |
| 206 | snd_rawmidi_kernel_read(msynth->input_rfile.input, NULL, 0); |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | /* close associated midi device for input */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 211 | static int midisynth_unsubscribe(void *private_data, struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
| 213 | int err; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 214 | struct seq_midisynth *msynth = private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 216 | if (snd_BUG_ON(!msynth->input_rfile.input)) |
| 217 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | err = snd_rawmidi_kernel_release(&msynth->input_rfile); |
| 219 | return err; |
| 220 | } |
| 221 | |
| 222 | /* open associated midi device for output */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 223 | static int midisynth_use(void *private_data, struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
| 225 | int err; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 226 | struct seq_midisynth *msynth = private_data; |
| 227 | struct snd_rawmidi_params params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
| 229 | /* open midi port */ |
Clemens Ladisch | f87135f | 2005-11-20 14:06:59 +0100 | [diff] [blame] | 230 | if ((err = snd_rawmidi_kernel_open(msynth->card, msynth->device, |
| 231 | msynth->subdevice, |
| 232 | SNDRV_RAWMIDI_LFLG_OUTPUT, |
| 233 | &msynth->output_rfile)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | snd_printd("midi output open failed!!!\n"); |
| 235 | return err; |
| 236 | } |
| 237 | memset(¶ms, 0, sizeof(params)); |
| 238 | params.avail_min = 1; |
| 239 | params.buffer_size = output_buffer_size; |
Clemens Ladisch | 2d4b842 | 2009-07-13 13:52:46 +0200 | [diff] [blame] | 240 | params.no_active_sensing = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if ((err = snd_rawmidi_output_params(msynth->output_rfile.output, ¶ms)) < 0) { |
| 242 | snd_rawmidi_kernel_release(&msynth->output_rfile); |
| 243 | return err; |
| 244 | } |
| 245 | snd_midi_event_reset_decode(msynth->parser); |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | /* close associated midi device for output */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 250 | static int midisynth_unuse(void *private_data, struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 252 | struct seq_midisynth *msynth = private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 254 | if (snd_BUG_ON(!msynth->output_rfile.output)) |
| 255 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | snd_rawmidi_drain_output(msynth->output_rfile.output); |
| 257 | return snd_rawmidi_kernel_release(&msynth->output_rfile); |
| 258 | } |
| 259 | |
| 260 | /* delete given midi synth port */ |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 261 | static void snd_seq_midisynth_delete(struct seq_midisynth *msynth) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
| 263 | if (msynth == NULL) |
| 264 | return; |
| 265 | |
| 266 | if (msynth->seq_client > 0) { |
| 267 | /* delete port */ |
| 268 | snd_seq_event_port_detach(msynth->seq_client, msynth->seq_port); |
| 269 | } |
| 270 | |
| 271 | if (msynth->parser) |
| 272 | snd_midi_event_free(msynth->parser); |
| 273 | } |
| 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | /* register new midi synth port */ |
| 276 | static int |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 277 | snd_seq_midisynth_register_port(struct snd_seq_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 279 | struct seq_midisynth_client *client; |
| 280 | struct seq_midisynth *msynth, *ms; |
| 281 | struct snd_seq_port_info *port; |
| 282 | struct snd_rawmidi_info *info; |
Clemens Ladisch | a7b928a | 2006-05-02 16:22:12 +0200 | [diff] [blame] | 283 | struct snd_rawmidi *rmidi = dev->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | int newclient = 0; |
| 285 | unsigned int p, ports; |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 286 | struct snd_seq_port_callback pcallbacks; |
| 287 | struct snd_card *card = dev->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | int device = dev->device; |
| 289 | unsigned int input_count = 0, output_count = 0; |
| 290 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 291 | if (snd_BUG_ON(!card || device < 0 || device >= SNDRV_RAWMIDI_DEVICES)) |
| 292 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
| 294 | if (! info) |
| 295 | return -ENOMEM; |
| 296 | info->device = device; |
| 297 | info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| 298 | info->subdevice = 0; |
| 299 | if (snd_rawmidi_info_select(card, info) >= 0) |
| 300 | output_count = info->subdevices_count; |
| 301 | info->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
| 302 | if (snd_rawmidi_info_select(card, info) >= 0) { |
| 303 | input_count = info->subdevices_count; |
| 304 | } |
| 305 | ports = output_count; |
| 306 | if (ports < input_count) |
| 307 | ports = input_count; |
| 308 | if (ports == 0) { |
| 309 | kfree(info); |
| 310 | return -ENODEV; |
| 311 | } |
| 312 | if (ports > (256 / SNDRV_RAWMIDI_DEVICES)) |
| 313 | ports = 256 / SNDRV_RAWMIDI_DEVICES; |
| 314 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 315 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | client = synths[card->number]; |
| 317 | if (client == NULL) { |
| 318 | newclient = 1; |
Takashi Iwai | ecca82b | 2005-09-09 14:20:49 +0200 | [diff] [blame] | 319 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | if (client == NULL) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 321 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | kfree(info); |
| 323 | return -ENOMEM; |
| 324 | } |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 325 | client->seq_client = |
| 326 | snd_seq_create_kernel_client( |
Alan Horstmann | 78fc030 | 2006-04-21 08:39:20 +0200 | [diff] [blame] | 327 | card, 0, "%s", card->shortname[0] ? |
| 328 | (const char *)card->shortname : "External MIDI"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | if (client->seq_client < 0) { |
| 330 | kfree(client); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 331 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | kfree(info); |
| 333 | return -ENOMEM; |
| 334 | } |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 335 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 337 | msynth = kcalloc(ports, sizeof(struct seq_midisynth), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | port = kmalloc(sizeof(*port), GFP_KERNEL); |
| 339 | if (msynth == NULL || port == NULL) |
| 340 | goto __nomem; |
| 341 | |
| 342 | for (p = 0; p < ports; p++) { |
| 343 | ms = &msynth[p]; |
| 344 | |
| 345 | if (snd_seq_midisynth_new(ms, card, device, p) < 0) |
| 346 | goto __nomem; |
| 347 | |
| 348 | /* declare port */ |
| 349 | memset(port, 0, sizeof(*port)); |
| 350 | port->addr.client = client->seq_client; |
| 351 | port->addr.port = device * (256 / SNDRV_RAWMIDI_DEVICES) + p; |
| 352 | port->flags = SNDRV_SEQ_PORT_FLG_GIVEN_PORT; |
| 353 | memset(info, 0, sizeof(*info)); |
| 354 | info->device = device; |
| 355 | if (p < output_count) |
| 356 | info->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| 357 | else |
| 358 | info->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
| 359 | info->subdevice = p; |
| 360 | if (snd_rawmidi_info_select(card, info) >= 0) |
| 361 | strcpy(port->name, info->subname); |
| 362 | if (! port->name[0]) { |
| 363 | if (info->name[0]) { |
| 364 | if (ports > 1) |
| 365 | snprintf(port->name, sizeof(port->name), "%s-%d", info->name, p); |
| 366 | else |
| 367 | snprintf(port->name, sizeof(port->name), "%s", info->name); |
| 368 | } else { |
| 369 | /* last resort */ |
| 370 | if (ports > 1) |
| 371 | sprintf(port->name, "MIDI %d-%d-%d", card->number, device, p); |
| 372 | else |
| 373 | sprintf(port->name, "MIDI %d-%d", card->number, device); |
| 374 | } |
| 375 | } |
| 376 | if ((info->flags & SNDRV_RAWMIDI_INFO_OUTPUT) && p < output_count) |
| 377 | port->capability |= SNDRV_SEQ_PORT_CAP_WRITE | SNDRV_SEQ_PORT_CAP_SYNC_WRITE | SNDRV_SEQ_PORT_CAP_SUBS_WRITE; |
| 378 | if ((info->flags & SNDRV_RAWMIDI_INFO_INPUT) && p < input_count) |
| 379 | port->capability |= SNDRV_SEQ_PORT_CAP_READ | SNDRV_SEQ_PORT_CAP_SYNC_READ | SNDRV_SEQ_PORT_CAP_SUBS_READ; |
| 380 | if ((port->capability & (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ)) == (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_READ) && |
| 381 | info->flags & SNDRV_RAWMIDI_INFO_DUPLEX) |
| 382 | port->capability |= SNDRV_SEQ_PORT_CAP_DUPLEX; |
Clemens Ladisch | 450047a | 2006-05-02 16:08:41 +0200 | [diff] [blame] | 383 | port->type = SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
| 384 | | SNDRV_SEQ_PORT_TYPE_HARDWARE |
| 385 | | SNDRV_SEQ_PORT_TYPE_PORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | port->midi_channels = 16; |
| 387 | memset(&pcallbacks, 0, sizeof(pcallbacks)); |
| 388 | pcallbacks.owner = THIS_MODULE; |
| 389 | pcallbacks.private_data = ms; |
| 390 | pcallbacks.subscribe = midisynth_subscribe; |
| 391 | pcallbacks.unsubscribe = midisynth_unsubscribe; |
| 392 | pcallbacks.use = midisynth_use; |
| 393 | pcallbacks.unuse = midisynth_unuse; |
| 394 | pcallbacks.event_input = event_process_midi; |
| 395 | port->kernel = &pcallbacks; |
Clemens Ladisch | a7b928a | 2006-05-02 16:22:12 +0200 | [diff] [blame] | 396 | if (rmidi->ops && rmidi->ops->get_port_info) |
| 397 | rmidi->ops->get_port_info(rmidi, p, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | if (snd_seq_kernel_client_ctl(client->seq_client, SNDRV_SEQ_IOCTL_CREATE_PORT, port)<0) |
| 399 | goto __nomem; |
| 400 | ms->seq_client = client->seq_client; |
| 401 | ms->seq_port = port->addr.port; |
| 402 | } |
| 403 | client->ports_per_device[device] = ports; |
| 404 | client->ports[device] = msynth; |
| 405 | client->num_ports++; |
| 406 | if (newclient) |
| 407 | synths[card->number] = client; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 408 | mutex_unlock(®ister_mutex); |
Takashi Iwai | 51f633d | 2005-03-30 13:49:06 +0200 | [diff] [blame] | 409 | kfree(info); |
| 410 | kfree(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | return 0; /* success */ |
| 412 | |
| 413 | __nomem: |
| 414 | if (msynth != NULL) { |
| 415 | for (p = 0; p < ports; p++) |
| 416 | snd_seq_midisynth_delete(&msynth[p]); |
| 417 | kfree(msynth); |
| 418 | } |
| 419 | if (newclient) { |
| 420 | snd_seq_delete_kernel_client(client->seq_client); |
| 421 | kfree(client); |
| 422 | } |
| 423 | kfree(info); |
| 424 | kfree(port); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 425 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | return -ENOMEM; |
| 427 | } |
| 428 | |
| 429 | /* release midi synth port */ |
| 430 | static int |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 431 | snd_seq_midisynth_unregister_port(struct snd_seq_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 433 | struct seq_midisynth_client *client; |
| 434 | struct seq_midisynth *msynth; |
| 435 | struct snd_card *card = dev->card; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | int device = dev->device, p, ports; |
| 437 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 438 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | client = synths[card->number]; |
| 440 | if (client == NULL || client->ports[device] == NULL) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 441 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return -ENODEV; |
| 443 | } |
| 444 | ports = client->ports_per_device[device]; |
| 445 | client->ports_per_device[device] = 0; |
| 446 | msynth = client->ports[device]; |
| 447 | client->ports[device] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | for (p = 0; p < ports; p++) |
| 449 | snd_seq_midisynth_delete(&msynth[p]); |
| 450 | kfree(msynth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | client->num_ports--; |
| 452 | if (client->num_ports <= 0) { |
| 453 | snd_seq_delete_kernel_client(client->seq_client); |
| 454 | synths[card->number] = NULL; |
| 455 | kfree(client); |
| 456 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 457 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | |
| 462 | static int __init alsa_seq_midi_init(void) |
| 463 | { |
Takashi Iwai | c7e0b5b | 2005-11-17 14:04:02 +0100 | [diff] [blame] | 464 | static struct snd_seq_dev_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | snd_seq_midisynth_register_port, |
| 466 | snd_seq_midisynth_unregister_port, |
| 467 | }; |
| 468 | memset(&synths, 0, sizeof(synths)); |
| 469 | snd_seq_autoload_lock(); |
| 470 | snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH, &ops, 0); |
| 471 | snd_seq_autoload_unlock(); |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | static void __exit alsa_seq_midi_exit(void) |
| 476 | { |
| 477 | snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_MIDISYNTH); |
| 478 | } |
| 479 | |
| 480 | module_init(alsa_seq_midi_init) |
| 481 | module_exit(alsa_seq_midi_exit) |