James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de> |
| 3 | * Creative Audio MIDI, for the CA0106 Driver |
| 4 | * Version: 0.0.1 |
| 5 | * |
| 6 | * Changelog: |
| 7 | * Implementation is based on mpu401 and emu10k1x and |
| 8 | * tested with ca0106. |
James Courtier-Dutton | 7b4260f | 2005-10-22 11:49:51 +0200 | [diff] [blame] | 9 | * mpu401: Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 10 | * emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com> |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | #include <linux/spinlock.h> |
| 30 | #include <sound/driver.h> |
| 31 | #include <sound/core.h> |
| 32 | #include <sound/rawmidi.h> |
| 33 | |
| 34 | #include "ca_midi.h" |
| 35 | |
| 36 | #define ca_midi_write_data(midi, data) midi->write(midi, data, 0) |
| 37 | #define ca_midi_write_cmd(midi, data) midi->write(midi, data, 1) |
| 38 | #define ca_midi_read_data(midi) midi->read(midi, 0) |
| 39 | #define ca_midi_read_stat(midi) midi->read(midi, 1) |
| 40 | #define ca_midi_input_avail(midi) (!(ca_midi_read_stat(midi) & midi->input_avail)) |
| 41 | #define ca_midi_output_ready(midi) (!(ca_midi_read_stat(midi) & midi->output_ready)) |
| 42 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 43 | static void ca_midi_clear_rx(struct snd_ca_midi *midi) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 44 | { |
| 45 | int timeout = 100000; |
| 46 | for (; timeout > 0 && ca_midi_input_avail(midi); timeout--) |
| 47 | ca_midi_read_data(midi); |
| 48 | #ifdef CONFIG_SND_DEBUG |
| 49 | if (timeout <= 0) |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 50 | snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n", |
| 51 | ca_midi_read_stat(midi)); |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 52 | #endif |
| 53 | } |
| 54 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 55 | static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status) |
| 56 | { |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 57 | unsigned char byte; |
| 58 | |
| 59 | if (midi->rmidi == NULL) { |
| 60 | midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable); |
| 61 | return; |
| 62 | } |
| 63 | |
| 64 | spin_lock(&midi->input_lock); |
| 65 | if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) { |
| 66 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { |
| 67 | ca_midi_clear_rx(midi); |
| 68 | } else { |
| 69 | byte = ca_midi_read_data(midi); |
| 70 | if(midi->substream_input) |
| 71 | snd_rawmidi_receive(midi->substream_input, &byte, 1); |
| 72 | |
| 73 | |
| 74 | } |
| 75 | } |
| 76 | spin_unlock(&midi->input_lock); |
| 77 | |
| 78 | spin_lock(&midi->output_lock); |
| 79 | if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) { |
| 80 | if (midi->substream_output && |
| 81 | snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) { |
| 82 | ca_midi_write_data(midi, byte); |
| 83 | } else { |
| 84 | midi->interrupt_disable(midi,midi->tx_enable); |
| 85 | } |
| 86 | } |
| 87 | spin_unlock(&midi->output_lock); |
| 88 | |
| 89 | } |
| 90 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 91 | static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 92 | { |
| 93 | unsigned long flags; |
| 94 | int timeout, ok; |
| 95 | |
| 96 | spin_lock_irqsave(&midi->input_lock, flags); |
| 97 | ca_midi_write_data(midi, 0x00); |
| 98 | /* ca_midi_clear_rx(midi); */ |
| 99 | |
| 100 | ca_midi_write_cmd(midi, cmd); |
| 101 | if (ack) { |
| 102 | ok = 0; |
| 103 | timeout = 10000; |
| 104 | while (!ok && timeout-- > 0) { |
| 105 | if (ca_midi_input_avail(midi)) { |
| 106 | if (ca_midi_read_data(midi) == midi->ack) |
| 107 | ok = 1; |
| 108 | } |
| 109 | } |
| 110 | if (!ok && ca_midi_read_data(midi) == midi->ack) |
| 111 | ok = 1; |
| 112 | } else { |
| 113 | ok = 1; |
| 114 | } |
| 115 | spin_unlock_irqrestore(&midi->input_lock, flags); |
| 116 | if (!ok) |
| 117 | snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n", |
| 118 | cmd, |
| 119 | midi->get_dev_id_port(midi->dev_id), |
| 120 | ca_midi_read_stat(midi), |
| 121 | ca_midi_read_data(midi)); |
| 122 | } |
| 123 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 124 | static int ca_midi_input_open(struct snd_rawmidi_substream *substream) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 125 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 126 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 127 | unsigned long flags; |
| 128 | |
| 129 | snd_assert(midi->dev_id, return -ENXIO); |
| 130 | spin_lock_irqsave(&midi->open_lock, flags); |
| 131 | midi->midi_mode |= CA_MIDI_MODE_INPUT; |
| 132 | midi->substream_input = substream; |
| 133 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) { |
| 134 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 135 | ca_midi_cmd(midi, midi->reset, 1); |
| 136 | ca_midi_cmd(midi, midi->enter_uart, 1); |
| 137 | } else { |
| 138 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 139 | } |
| 140 | return 0; |
| 141 | } |
| 142 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 143 | static int ca_midi_output_open(struct snd_rawmidi_substream *substream) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 144 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 145 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 146 | unsigned long flags; |
| 147 | |
| 148 | snd_assert(midi->dev_id, return -ENXIO); |
| 149 | spin_lock_irqsave(&midi->open_lock, flags); |
| 150 | midi->midi_mode |= CA_MIDI_MODE_OUTPUT; |
| 151 | midi->substream_output = substream; |
| 152 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { |
| 153 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 154 | ca_midi_cmd(midi, midi->reset, 1); |
| 155 | ca_midi_cmd(midi, midi->enter_uart, 1); |
| 156 | } else { |
| 157 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 158 | } |
| 159 | return 0; |
| 160 | } |
| 161 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 162 | static int ca_midi_input_close(struct snd_rawmidi_substream *substream) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 163 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 164 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 165 | unsigned long flags; |
| 166 | |
| 167 | snd_assert(midi->dev_id, return -ENXIO); |
| 168 | spin_lock_irqsave(&midi->open_lock, flags); |
| 169 | midi->interrupt_disable(midi,midi->rx_enable); |
| 170 | midi->midi_mode &= ~CA_MIDI_MODE_INPUT; |
| 171 | midi->substream_input = NULL; |
| 172 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) { |
| 173 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 174 | ca_midi_cmd(midi, midi->reset, 0); |
| 175 | } else { |
| 176 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 177 | } |
| 178 | return 0; |
| 179 | } |
| 180 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 181 | static int ca_midi_output_close(struct snd_rawmidi_substream *substream) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 182 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 183 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 184 | unsigned long flags; |
| 185 | snd_assert(midi->dev_id, return -ENXIO); |
| 186 | |
| 187 | spin_lock_irqsave(&midi->open_lock, flags); |
| 188 | |
| 189 | midi->interrupt_disable(midi,midi->tx_enable); |
| 190 | midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT; |
| 191 | midi->substream_output = NULL; |
| 192 | |
| 193 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { |
| 194 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 195 | ca_midi_cmd(midi, midi->reset, 0); |
| 196 | } else { |
| 197 | spin_unlock_irqrestore(&midi->open_lock, flags); |
| 198 | } |
| 199 | return 0; |
| 200 | } |
| 201 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 202 | static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 203 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 204 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 205 | snd_assert(midi->dev_id, return); |
| 206 | |
| 207 | if (up) { |
| 208 | midi->interrupt_enable(midi,midi->rx_enable); |
| 209 | } else { |
| 210 | midi->interrupt_disable(midi, midi->rx_enable); |
| 211 | } |
| 212 | } |
| 213 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 214 | static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 215 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 216 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 217 | unsigned long flags; |
| 218 | |
| 219 | snd_assert(midi->dev_id, return); |
| 220 | |
| 221 | if (up) { |
| 222 | int max = 4; |
| 223 | unsigned char byte; |
| 224 | |
| 225 | spin_lock_irqsave(&midi->output_lock, flags); |
| 226 | |
| 227 | /* try to send some amount of bytes here before interrupts */ |
| 228 | while (max > 0) { |
| 229 | if (ca_midi_output_ready(midi)) { |
| 230 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) || |
| 231 | snd_rawmidi_transmit(substream, &byte, 1) != 1) { |
| 232 | /* no more data */ |
| 233 | spin_unlock_irqrestore(&midi->output_lock, flags); |
| 234 | return; |
| 235 | } |
| 236 | ca_midi_write_data(midi, byte); |
| 237 | max--; |
| 238 | } else { |
| 239 | break; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | spin_unlock_irqrestore(&midi->output_lock, flags); |
| 244 | midi->interrupt_enable(midi,midi->tx_enable); |
| 245 | |
| 246 | } else { |
| 247 | midi->interrupt_disable(midi,midi->tx_enable); |
| 248 | } |
| 249 | } |
| 250 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 251 | static struct snd_rawmidi_ops ca_midi_output = |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 252 | { |
| 253 | .open = ca_midi_output_open, |
| 254 | .close = ca_midi_output_close, |
| 255 | .trigger = ca_midi_output_trigger, |
| 256 | }; |
| 257 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 258 | static struct snd_rawmidi_ops ca_midi_input = |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 259 | { |
| 260 | .open = ca_midi_input_open, |
| 261 | .close = ca_midi_input_close, |
| 262 | .trigger = ca_midi_input_trigger, |
| 263 | }; |
| 264 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 265 | static void ca_midi_free(struct snd_ca_midi *midi) |
| 266 | { |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 267 | midi->interrupt = NULL; |
| 268 | midi->interrupt_enable = NULL; |
| 269 | midi->interrupt_disable = NULL; |
| 270 | midi->read = NULL; |
| 271 | midi->write = NULL; |
| 272 | midi->get_dev_id_card = NULL; |
| 273 | midi->get_dev_id_port = NULL; |
| 274 | midi->rmidi = NULL; |
| 275 | } |
| 276 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 277 | static void ca_rmidi_free(struct snd_rawmidi *rmidi) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 278 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 279 | ca_midi_free(rmidi->private_data); |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 280 | } |
| 281 | |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 282 | int __devinit ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name) |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 283 | { |
Takashi Iwai | e4a3d14 | 2005-11-17 14:55:40 +0100 | [diff] [blame] | 284 | struct snd_rawmidi *rmidi; |
James Courtier-Dutton | 8a5afd2 | 2005-10-20 22:57:51 +0200 | [diff] [blame] | 285 | int err; |
| 286 | |
| 287 | if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0) |
| 288 | return err; |
| 289 | |
| 290 | midi->dev_id = dev_id; |
| 291 | midi->interrupt = ca_midi_interrupt; |
| 292 | |
| 293 | spin_lock_init(&midi->open_lock); |
| 294 | spin_lock_init(&midi->input_lock); |
| 295 | spin_lock_init(&midi->output_lock); |
| 296 | |
| 297 | strcpy(rmidi->name, name); |
| 298 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output); |
| 299 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input); |
| 300 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | |
| 301 | SNDRV_RAWMIDI_INFO_INPUT | |
| 302 | SNDRV_RAWMIDI_INFO_DUPLEX; |
| 303 | rmidi->private_data = midi; |
| 304 | rmidi->private_free = ca_rmidi_free; |
| 305 | |
| 306 | midi->rmidi = rmidi; |
| 307 | return 0; |
| 308 | } |
| 309 | |