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8a5afd29 JCD |
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. | |
c1017a4c | 9 | * mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
7b4260f2 | 10 | * emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com> |
8a5afd29 JCD |
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> | |
8a5afd29 JCD |
30 | #include <sound/core.h> |
31 | #include <sound/rawmidi.h> | |
32 | ||
33 | #include "ca_midi.h" | |
34 | ||
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)) | |
41 | ||
e4a3d145 | 42 | static void ca_midi_clear_rx(struct snd_ca_midi *midi) |
8a5afd29 JCD |
43 | { |
44 | int timeout = 100000; | |
45 | for (; timeout > 0 && ca_midi_input_avail(midi); timeout--) | |
46 | ca_midi_read_data(midi); | |
47 | #ifdef CONFIG_SND_DEBUG | |
48 | if (timeout <= 0) | |
74103227 | 49 | pr_err("ca_midi_clear_rx: timeout (status = 0x%x)\n", |
e4a3d145 | 50 | ca_midi_read_stat(midi)); |
8a5afd29 JCD |
51 | #endif |
52 | } | |
53 | ||
e4a3d145 TI |
54 | static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status) |
55 | { | |
8a5afd29 JCD |
56 | unsigned char byte; |
57 | ||
58 | if (midi->rmidi == NULL) { | |
59 | midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable); | |
60 | return; | |
61 | } | |
62 | ||
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); | |
67 | } else { | |
68 | byte = ca_midi_read_data(midi); | |
69 | if(midi->substream_input) | |
70 | snd_rawmidi_receive(midi->substream_input, &byte, 1); | |
71 | ||
72 | ||
73 | } | |
74 | } | |
75 | spin_unlock(&midi->input_lock); | |
76 | ||
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); | |
82 | } else { | |
83 | midi->interrupt_disable(midi,midi->tx_enable); | |
84 | } | |
85 | } | |
86 | spin_unlock(&midi->output_lock); | |
87 | ||
88 | } | |
89 | ||
e4a3d145 | 90 | static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack) |
8a5afd29 JCD |
91 | { |
92 | unsigned long flags; | |
93 | int timeout, ok; | |
94 | ||
95 | spin_lock_irqsave(&midi->input_lock, flags); | |
96 | ca_midi_write_data(midi, 0x00); | |
97 | /* ca_midi_clear_rx(midi); */ | |
98 | ||
99 | ca_midi_write_cmd(midi, cmd); | |
100 | if (ack) { | |
101 | ok = 0; | |
102 | timeout = 10000; | |
103 | while (!ok && timeout-- > 0) { | |
104 | if (ca_midi_input_avail(midi)) { | |
105 | if (ca_midi_read_data(midi) == midi->ack) | |
106 | ok = 1; | |
107 | } | |
108 | } | |
109 | if (!ok && ca_midi_read_data(midi) == midi->ack) | |
110 | ok = 1; | |
111 | } else { | |
112 | ok = 1; | |
113 | } | |
114 | spin_unlock_irqrestore(&midi->input_lock, flags); | |
115 | if (!ok) | |
74103227 | 116 | pr_err("ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n", |
8a5afd29 JCD |
117 | cmd, |
118 | midi->get_dev_id_port(midi->dev_id), | |
119 | ca_midi_read_stat(midi), | |
120 | ca_midi_read_data(midi)); | |
121 | } | |
122 | ||
e4a3d145 | 123 | static int ca_midi_input_open(struct snd_rawmidi_substream *substream) |
8a5afd29 | 124 | { |
e4a3d145 | 125 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
8a5afd29 JCD |
126 | unsigned long flags; |
127 | ||
da3cec35 TI |
128 | if (snd_BUG_ON(!midi->dev_id)) |
129 | return -ENXIO; | |
8a5afd29 JCD |
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 | ||
e4a3d145 | 143 | static int ca_midi_output_open(struct snd_rawmidi_substream *substream) |
8a5afd29 | 144 | { |
e4a3d145 | 145 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
8a5afd29 JCD |
146 | unsigned long flags; |
147 | ||
da3cec35 TI |
148 | if (snd_BUG_ON(!midi->dev_id)) |
149 | return -ENXIO; | |
8a5afd29 JCD |
150 | spin_lock_irqsave(&midi->open_lock, flags); |
151 | midi->midi_mode |= CA_MIDI_MODE_OUTPUT; | |
152 | midi->substream_output = substream; | |
153 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { | |
154 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
155 | ca_midi_cmd(midi, midi->reset, 1); | |
156 | ca_midi_cmd(midi, midi->enter_uart, 1); | |
157 | } else { | |
158 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
159 | } | |
160 | return 0; | |
161 | } | |
162 | ||
e4a3d145 | 163 | static int ca_midi_input_close(struct snd_rawmidi_substream *substream) |
8a5afd29 | 164 | { |
e4a3d145 | 165 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
8a5afd29 JCD |
166 | unsigned long flags; |
167 | ||
da3cec35 TI |
168 | if (snd_BUG_ON(!midi->dev_id)) |
169 | return -ENXIO; | |
8a5afd29 JCD |
170 | spin_lock_irqsave(&midi->open_lock, flags); |
171 | midi->interrupt_disable(midi,midi->rx_enable); | |
172 | midi->midi_mode &= ~CA_MIDI_MODE_INPUT; | |
173 | midi->substream_input = NULL; | |
174 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) { | |
175 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
176 | ca_midi_cmd(midi, midi->reset, 0); | |
177 | } else { | |
178 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
179 | } | |
180 | return 0; | |
181 | } | |
182 | ||
e4a3d145 | 183 | static int ca_midi_output_close(struct snd_rawmidi_substream *substream) |
8a5afd29 | 184 | { |
e4a3d145 | 185 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
8a5afd29 | 186 | unsigned long flags; |
da3cec35 TI |
187 | |
188 | if (snd_BUG_ON(!midi->dev_id)) | |
189 | return -ENXIO; | |
8a5afd29 JCD |
190 | |
191 | spin_lock_irqsave(&midi->open_lock, flags); | |
192 | ||
193 | midi->interrupt_disable(midi,midi->tx_enable); | |
194 | midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT; | |
195 | midi->substream_output = NULL; | |
196 | ||
197 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { | |
198 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
199 | ca_midi_cmd(midi, midi->reset, 0); | |
200 | } else { | |
201 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
202 | } | |
203 | return 0; | |
204 | } | |
205 | ||
e4a3d145 | 206 | static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
8a5afd29 | 207 | { |
e4a3d145 | 208 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
da3cec35 TI |
209 | |
210 | if (snd_BUG_ON(!midi->dev_id)) | |
211 | return; | |
8a5afd29 JCD |
212 | |
213 | if (up) { | |
214 | midi->interrupt_enable(midi,midi->rx_enable); | |
215 | } else { | |
216 | midi->interrupt_disable(midi, midi->rx_enable); | |
217 | } | |
218 | } | |
219 | ||
e4a3d145 | 220 | static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
8a5afd29 | 221 | { |
e4a3d145 | 222 | struct snd_ca_midi *midi = substream->rmidi->private_data; |
8a5afd29 JCD |
223 | unsigned long flags; |
224 | ||
da3cec35 TI |
225 | if (snd_BUG_ON(!midi->dev_id)) |
226 | return; | |
8a5afd29 JCD |
227 | |
228 | if (up) { | |
229 | int max = 4; | |
230 | unsigned char byte; | |
231 | ||
232 | spin_lock_irqsave(&midi->output_lock, flags); | |
233 | ||
234 | /* try to send some amount of bytes here before interrupts */ | |
235 | while (max > 0) { | |
236 | if (ca_midi_output_ready(midi)) { | |
237 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) || | |
238 | snd_rawmidi_transmit(substream, &byte, 1) != 1) { | |
239 | /* no more data */ | |
240 | spin_unlock_irqrestore(&midi->output_lock, flags); | |
241 | return; | |
242 | } | |
243 | ca_midi_write_data(midi, byte); | |
244 | max--; | |
245 | } else { | |
246 | break; | |
247 | } | |
248 | } | |
249 | ||
250 | spin_unlock_irqrestore(&midi->output_lock, flags); | |
251 | midi->interrupt_enable(midi,midi->tx_enable); | |
252 | ||
253 | } else { | |
254 | midi->interrupt_disable(midi,midi->tx_enable); | |
255 | } | |
256 | } | |
257 | ||
e4a3d145 | 258 | static struct snd_rawmidi_ops ca_midi_output = |
8a5afd29 JCD |
259 | { |
260 | .open = ca_midi_output_open, | |
261 | .close = ca_midi_output_close, | |
262 | .trigger = ca_midi_output_trigger, | |
263 | }; | |
264 | ||
e4a3d145 | 265 | static struct snd_rawmidi_ops ca_midi_input = |
8a5afd29 JCD |
266 | { |
267 | .open = ca_midi_input_open, | |
268 | .close = ca_midi_input_close, | |
269 | .trigger = ca_midi_input_trigger, | |
270 | }; | |
271 | ||
e4a3d145 TI |
272 | static void ca_midi_free(struct snd_ca_midi *midi) |
273 | { | |
8a5afd29 JCD |
274 | midi->interrupt = NULL; |
275 | midi->interrupt_enable = NULL; | |
276 | midi->interrupt_disable = NULL; | |
277 | midi->read = NULL; | |
278 | midi->write = NULL; | |
279 | midi->get_dev_id_card = NULL; | |
280 | midi->get_dev_id_port = NULL; | |
281 | midi->rmidi = NULL; | |
282 | } | |
283 | ||
e4a3d145 | 284 | static void ca_rmidi_free(struct snd_rawmidi *rmidi) |
8a5afd29 | 285 | { |
e4a3d145 | 286 | ca_midi_free(rmidi->private_data); |
8a5afd29 JCD |
287 | } |
288 | ||
e23e7a14 | 289 | int ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name) |
8a5afd29 | 290 | { |
e4a3d145 | 291 | struct snd_rawmidi *rmidi; |
8a5afd29 JCD |
292 | int err; |
293 | ||
294 | if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0) | |
295 | return err; | |
296 | ||
297 | midi->dev_id = dev_id; | |
298 | midi->interrupt = ca_midi_interrupt; | |
299 | ||
300 | spin_lock_init(&midi->open_lock); | |
301 | spin_lock_init(&midi->input_lock); | |
302 | spin_lock_init(&midi->output_lock); | |
303 | ||
304 | strcpy(rmidi->name, name); | |
305 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output); | |
306 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input); | |
307 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | | |
308 | SNDRV_RAWMIDI_INFO_INPUT | | |
309 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
310 | rmidi->private_data = midi; | |
311 | rmidi->private_free = ca_rmidi_free; | |
312 | ||
313 | midi->rmidi = rmidi; | |
314 | return 0; | |
315 | } | |
316 |