2 * Copyright 10/16/2005 Tilman Kranz <tilde@tk-sls.de>
3 * Creative Audio MIDI, for the CA0106 Driver
7 * Implementation is based on mpu401 and emu10k1x and
9 * mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz>
10 * emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
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.
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.
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
29 #include <linux/spinlock.h>
30 #include <sound/core.h>
31 #include <sound/rawmidi.h>
35 #define ca_midi_write_data(midi, data) midi->write(midi, data, 0)
36 #define ca_midi_write_cmd(midi, data) midi->write(midi, data, 1)
37 #define ca_midi_read_data(midi) midi->read(midi, 0)
38 #define ca_midi_read_stat(midi) midi->read(midi, 1)
39 #define ca_midi_input_avail(midi) (!(ca_midi_read_stat(midi) & midi->input_avail))
40 #define ca_midi_output_ready(midi) (!(ca_midi_read_stat(midi) & midi->output_ready))
42 static void ca_midi_clear_rx(struct snd_ca_midi *midi)
45 for (; timeout > 0 && ca_midi_input_avail(midi); timeout--)
46 ca_midi_read_data(midi);
47 #ifdef CONFIG_SND_DEBUG
49 snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n",
50 ca_midi_read_stat(midi));
54 static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
58 if (midi->rmidi == NULL) {
59 midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
63 spin_lock(&midi->input_lock);
64 if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
65 if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
66 ca_midi_clear_rx(midi);
68 byte = ca_midi_read_data(midi);
69 if(midi->substream_input)
70 snd_rawmidi_receive(midi->substream_input, &byte, 1);
75 spin_unlock(&midi->input_lock);
77 spin_lock(&midi->output_lock);
78 if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
79 if (midi->substream_output &&
80 snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
81 ca_midi_write_data(midi, byte);
83 midi->interrupt_disable(midi,midi->tx_enable);
86 spin_unlock(&midi->output_lock);
90 static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
95 spin_lock_irqsave(&midi->input_lock, flags);
96 ca_midi_write_data(midi, 0x00);
97 /* ca_midi_clear_rx(midi); */
99 ca_midi_write_cmd(midi, cmd);
103 while (!ok && timeout-- > 0) {
104 if (ca_midi_input_avail(midi)) {
105 if (ca_midi_read_data(midi) == midi->ack)
109 if (!ok && ca_midi_read_data(midi) == midi->ack)
114 spin_unlock_irqrestore(&midi->input_lock, flags);
116 snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
118 midi->get_dev_id_port(midi->dev_id),
119 ca_midi_read_stat(midi),
120 ca_midi_read_data(midi));
123 static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
125 struct snd_ca_midi *midi = substream->rmidi->private_data;
128 snd_assert(midi->dev_id, return -ENXIO);
129 spin_lock_irqsave(&midi->open_lock, flags);
130 midi->midi_mode |= CA_MIDI_MODE_INPUT;
131 midi->substream_input = substream;
132 if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
133 spin_unlock_irqrestore(&midi->open_lock, flags);
134 ca_midi_cmd(midi, midi->reset, 1);
135 ca_midi_cmd(midi, midi->enter_uart, 1);
137 spin_unlock_irqrestore(&midi->open_lock, flags);
142 static int ca_midi_output_open(struct snd_rawmidi_substream *substream)
144 struct snd_ca_midi *midi = substream->rmidi->private_data;
147 snd_assert(midi->dev_id, return -ENXIO);
148 spin_lock_irqsave(&midi->open_lock, flags);
149 midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
150 midi->substream_output = substream;
151 if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
152 spin_unlock_irqrestore(&midi->open_lock, flags);
153 ca_midi_cmd(midi, midi->reset, 1);
154 ca_midi_cmd(midi, midi->enter_uart, 1);
156 spin_unlock_irqrestore(&midi->open_lock, flags);
161 static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
163 struct snd_ca_midi *midi = substream->rmidi->private_data;
166 snd_assert(midi->dev_id, return -ENXIO);
167 spin_lock_irqsave(&midi->open_lock, flags);
168 midi->interrupt_disable(midi,midi->rx_enable);
169 midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
170 midi->substream_input = NULL;
171 if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
172 spin_unlock_irqrestore(&midi->open_lock, flags);
173 ca_midi_cmd(midi, midi->reset, 0);
175 spin_unlock_irqrestore(&midi->open_lock, flags);
180 static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
182 struct snd_ca_midi *midi = substream->rmidi->private_data;
184 snd_assert(midi->dev_id, return -ENXIO);
186 spin_lock_irqsave(&midi->open_lock, flags);
188 midi->interrupt_disable(midi,midi->tx_enable);
189 midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
190 midi->substream_output = NULL;
192 if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
193 spin_unlock_irqrestore(&midi->open_lock, flags);
194 ca_midi_cmd(midi, midi->reset, 0);
196 spin_unlock_irqrestore(&midi->open_lock, flags);
201 static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
203 struct snd_ca_midi *midi = substream->rmidi->private_data;
204 snd_assert(midi->dev_id, return);
207 midi->interrupt_enable(midi,midi->rx_enable);
209 midi->interrupt_disable(midi, midi->rx_enable);
213 static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
215 struct snd_ca_midi *midi = substream->rmidi->private_data;
218 snd_assert(midi->dev_id, return);
224 spin_lock_irqsave(&midi->output_lock, flags);
226 /* try to send some amount of bytes here before interrupts */
228 if (ca_midi_output_ready(midi)) {
229 if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
230 snd_rawmidi_transmit(substream, &byte, 1) != 1) {
232 spin_unlock_irqrestore(&midi->output_lock, flags);
235 ca_midi_write_data(midi, byte);
242 spin_unlock_irqrestore(&midi->output_lock, flags);
243 midi->interrupt_enable(midi,midi->tx_enable);
246 midi->interrupt_disable(midi,midi->tx_enable);
250 static struct snd_rawmidi_ops ca_midi_output =
252 .open = ca_midi_output_open,
253 .close = ca_midi_output_close,
254 .trigger = ca_midi_output_trigger,
257 static struct snd_rawmidi_ops ca_midi_input =
259 .open = ca_midi_input_open,
260 .close = ca_midi_input_close,
261 .trigger = ca_midi_input_trigger,
264 static void ca_midi_free(struct snd_ca_midi *midi)
266 midi->interrupt = NULL;
267 midi->interrupt_enable = NULL;
268 midi->interrupt_disable = NULL;
271 midi->get_dev_id_card = NULL;
272 midi->get_dev_id_port = NULL;
276 static void ca_rmidi_free(struct snd_rawmidi *rmidi)
278 ca_midi_free(rmidi->private_data);
281 int __devinit ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name)
283 struct snd_rawmidi *rmidi;
286 if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
289 midi->dev_id = dev_id;
290 midi->interrupt = ca_midi_interrupt;
292 spin_lock_init(&midi->open_lock);
293 spin_lock_init(&midi->input_lock);
294 spin_lock_init(&midi->output_lock);
296 strcpy(rmidi->name, name);
297 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
298 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
299 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
300 SNDRV_RAWMIDI_INFO_INPUT |
301 SNDRV_RAWMIDI_INFO_DUPLEX;
302 rmidi->private_data = midi;
303 rmidi->private_free = ca_rmidi_free;