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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. | |
7b4260f2 JCD |
9 | * mpu401: Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
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> | |
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 | ||
43 | static void ca_midi_clear_rx(ca_midi_t *midi) | |
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) | |
50 | snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n", ca_midi_read_stat(midi)); | |
51 | #endif | |
52 | } | |
53 | ||
7cf4783b | 54 | static void ca_midi_interrupt(ca_midi_t *midi, unsigned int status) { |
8a5afd29 JCD |
55 | unsigned char byte; |
56 | ||
57 | if (midi->rmidi == NULL) { | |
58 | midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable); | |
59 | return; | |
60 | } | |
61 | ||
62 | spin_lock(&midi->input_lock); | |
63 | if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) { | |
64 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { | |
65 | ca_midi_clear_rx(midi); | |
66 | } else { | |
67 | byte = ca_midi_read_data(midi); | |
68 | if(midi->substream_input) | |
69 | snd_rawmidi_receive(midi->substream_input, &byte, 1); | |
70 | ||
71 | ||
72 | } | |
73 | } | |
74 | spin_unlock(&midi->input_lock); | |
75 | ||
76 | spin_lock(&midi->output_lock); | |
77 | if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) { | |
78 | if (midi->substream_output && | |
79 | snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) { | |
80 | ca_midi_write_data(midi, byte); | |
81 | } else { | |
82 | midi->interrupt_disable(midi,midi->tx_enable); | |
83 | } | |
84 | } | |
85 | spin_unlock(&midi->output_lock); | |
86 | ||
87 | } | |
88 | ||
89 | static void ca_midi_cmd(ca_midi_t *midi, unsigned char cmd, int ack) | |
90 | { | |
91 | unsigned long flags; | |
92 | int timeout, ok; | |
93 | ||
94 | spin_lock_irqsave(&midi->input_lock, flags); | |
95 | ca_midi_write_data(midi, 0x00); | |
96 | /* ca_midi_clear_rx(midi); */ | |
97 | ||
98 | ca_midi_write_cmd(midi, cmd); | |
99 | if (ack) { | |
100 | ok = 0; | |
101 | timeout = 10000; | |
102 | while (!ok && timeout-- > 0) { | |
103 | if (ca_midi_input_avail(midi)) { | |
104 | if (ca_midi_read_data(midi) == midi->ack) | |
105 | ok = 1; | |
106 | } | |
107 | } | |
108 | if (!ok && ca_midi_read_data(midi) == midi->ack) | |
109 | ok = 1; | |
110 | } else { | |
111 | ok = 1; | |
112 | } | |
113 | spin_unlock_irqrestore(&midi->input_lock, flags); | |
114 | if (!ok) | |
115 | snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n", | |
116 | cmd, | |
117 | midi->get_dev_id_port(midi->dev_id), | |
118 | ca_midi_read_stat(midi), | |
119 | ca_midi_read_data(midi)); | |
120 | } | |
121 | ||
122 | static int ca_midi_input_open(snd_rawmidi_substream_t * substream) | |
123 | { | |
124 | ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data; | |
125 | unsigned long flags; | |
126 | ||
127 | snd_assert(midi->dev_id, return -ENXIO); | |
128 | spin_lock_irqsave(&midi->open_lock, flags); | |
129 | midi->midi_mode |= CA_MIDI_MODE_INPUT; | |
130 | midi->substream_input = substream; | |
131 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) { | |
132 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
133 | ca_midi_cmd(midi, midi->reset, 1); | |
134 | ca_midi_cmd(midi, midi->enter_uart, 1); | |
135 | } else { | |
136 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int ca_midi_output_open(snd_rawmidi_substream_t * substream) | |
142 | { | |
143 | ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data; | |
144 | unsigned long flags; | |
145 | ||
146 | snd_assert(midi->dev_id, return -ENXIO); | |
147 | spin_lock_irqsave(&midi->open_lock, flags); | |
148 | midi->midi_mode |= CA_MIDI_MODE_OUTPUT; | |
149 | midi->substream_output = substream; | |
150 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { | |
151 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
152 | ca_midi_cmd(midi, midi->reset, 1); | |
153 | ca_midi_cmd(midi, midi->enter_uart, 1); | |
154 | } else { | |
155 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static int ca_midi_input_close(snd_rawmidi_substream_t * substream) | |
161 | { | |
162 | ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data; | |
163 | unsigned long flags; | |
164 | ||
165 | snd_assert(midi->dev_id, return -ENXIO); | |
166 | spin_lock_irqsave(&midi->open_lock, flags); | |
167 | midi->interrupt_disable(midi,midi->rx_enable); | |
168 | midi->midi_mode &= ~CA_MIDI_MODE_INPUT; | |
169 | midi->substream_input = NULL; | |
170 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) { | |
171 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
172 | ca_midi_cmd(midi, midi->reset, 0); | |
173 | } else { | |
174 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
175 | } | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static int ca_midi_output_close(snd_rawmidi_substream_t * substream) | |
180 | { | |
181 | ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data; | |
182 | unsigned long flags; | |
183 | snd_assert(midi->dev_id, return -ENXIO); | |
184 | ||
185 | spin_lock_irqsave(&midi->open_lock, flags); | |
186 | ||
187 | midi->interrupt_disable(midi,midi->tx_enable); | |
188 | midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT; | |
189 | midi->substream_output = NULL; | |
190 | ||
191 | if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) { | |
192 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
193 | ca_midi_cmd(midi, midi->reset, 0); | |
194 | } else { | |
195 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
196 | } | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static void ca_midi_input_trigger(snd_rawmidi_substream_t * substream, int up) | |
201 | { | |
202 | ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data; | |
203 | snd_assert(midi->dev_id, return); | |
204 | ||
205 | if (up) { | |
206 | midi->interrupt_enable(midi,midi->rx_enable); | |
207 | } else { | |
208 | midi->interrupt_disable(midi, midi->rx_enable); | |
209 | } | |
210 | } | |
211 | ||
212 | static void ca_midi_output_trigger(snd_rawmidi_substream_t * substream, int up) | |
213 | { | |
214 | ca_midi_t *midi = (ca_midi_t *)substream->rmidi->private_data; | |
215 | unsigned long flags; | |
216 | ||
217 | snd_assert(midi->dev_id, return); | |
218 | ||
219 | if (up) { | |
220 | int max = 4; | |
221 | unsigned char byte; | |
222 | ||
223 | spin_lock_irqsave(&midi->output_lock, flags); | |
224 | ||
225 | /* try to send some amount of bytes here before interrupts */ | |
226 | while (max > 0) { | |
227 | if (ca_midi_output_ready(midi)) { | |
228 | if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) || | |
229 | snd_rawmidi_transmit(substream, &byte, 1) != 1) { | |
230 | /* no more data */ | |
231 | spin_unlock_irqrestore(&midi->output_lock, flags); | |
232 | return; | |
233 | } | |
234 | ca_midi_write_data(midi, byte); | |
235 | max--; | |
236 | } else { | |
237 | break; | |
238 | } | |
239 | } | |
240 | ||
241 | spin_unlock_irqrestore(&midi->output_lock, flags); | |
242 | midi->interrupt_enable(midi,midi->tx_enable); | |
243 | ||
244 | } else { | |
245 | midi->interrupt_disable(midi,midi->tx_enable); | |
246 | } | |
247 | } | |
248 | ||
249 | static snd_rawmidi_ops_t ca_midi_output = | |
250 | { | |
251 | .open = ca_midi_output_open, | |
252 | .close = ca_midi_output_close, | |
253 | .trigger = ca_midi_output_trigger, | |
254 | }; | |
255 | ||
256 | static snd_rawmidi_ops_t ca_midi_input = | |
257 | { | |
258 | .open = ca_midi_input_open, | |
259 | .close = ca_midi_input_close, | |
260 | .trigger = ca_midi_input_trigger, | |
261 | }; | |
262 | ||
7cf4783b | 263 | static void ca_midi_free(ca_midi_t *midi) { |
8a5afd29 JCD |
264 | midi->interrupt = NULL; |
265 | midi->interrupt_enable = NULL; | |
266 | midi->interrupt_disable = NULL; | |
267 | midi->read = NULL; | |
268 | midi->write = NULL; | |
269 | midi->get_dev_id_card = NULL; | |
270 | midi->get_dev_id_port = NULL; | |
271 | midi->rmidi = NULL; | |
272 | } | |
273 | ||
274 | static void ca_rmidi_free(snd_rawmidi_t *rmidi) | |
275 | { | |
276 | ca_midi_free((ca_midi_t *)rmidi->private_data); | |
277 | } | |
278 | ||
279 | int __devinit ca_midi_init(void *dev_id, ca_midi_t *midi, int device, char *name) | |
280 | { | |
281 | snd_rawmidi_t *rmidi; | |
282 | int err; | |
283 | ||
284 | if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0) | |
285 | return err; | |
286 | ||
287 | midi->dev_id = dev_id; | |
288 | midi->interrupt = ca_midi_interrupt; | |
289 | ||
290 | spin_lock_init(&midi->open_lock); | |
291 | spin_lock_init(&midi->input_lock); | |
292 | spin_lock_init(&midi->output_lock); | |
293 | ||
294 | strcpy(rmidi->name, name); | |
295 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output); | |
296 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input); | |
297 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | | |
298 | SNDRV_RAWMIDI_INFO_INPUT | | |
299 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
300 | rmidi->private_data = midi; | |
301 | rmidi->private_free = ca_rmidi_free; | |
302 | ||
303 | midi->rmidi = rmidi; | |
304 | return 0; | |
305 | } | |
306 |