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1da177e4 | 1 | /* |
c1017a4c | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
3 | * Routines for control of EMU10K1 MPU-401 in UART mode |
4 | * | |
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 | #include <sound/driver.h> | |
23 | #include <linux/time.h> | |
24 | #include <linux/init.h> | |
25 | #include <sound/core.h> | |
26 | #include <sound/emu10k1.h> | |
27 | ||
28 | #define EMU10K1_MIDI_MODE_INPUT (1<<0) | |
29 | #define EMU10K1_MIDI_MODE_OUTPUT (1<<1) | |
30 | ||
eb4698f3 TI |
31 | static inline unsigned char mpu401_read(struct snd_emu10k1 *emu, |
32 | struct snd_emu10k1_midi *mpu, int idx) | |
1da177e4 LT |
33 | { |
34 | if (emu->audigy) | |
35 | return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0); | |
36 | else | |
37 | return inb(emu->port + mpu->port + idx); | |
38 | } | |
39 | ||
eb4698f3 TI |
40 | static inline void mpu401_write(struct snd_emu10k1 *emu, |
41 | struct snd_emu10k1_midi *mpu, int data, int idx) | |
1da177e4 LT |
42 | { |
43 | if (emu->audigy) | |
44 | snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data); | |
45 | else | |
46 | outb(data, emu->port + mpu->port + idx); | |
47 | } | |
48 | ||
49 | #define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0) | |
50 | #define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1) | |
51 | #define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0) | |
52 | #define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1) | |
53 | ||
54 | #define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80)) | |
55 | #define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40)) | |
56 | ||
57 | #define MPU401_RESET 0xff | |
58 | #define MPU401_ENTER_UART 0x3f | |
59 | #define MPU401_ACK 0xfe | |
60 | ||
eb4698f3 | 61 | static void mpu401_clear_rx(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *mpu) |
1da177e4 LT |
62 | { |
63 | int timeout = 100000; | |
64 | for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--) | |
65 | mpu401_read_data(emu, mpu); | |
66 | #ifdef CONFIG_SND_DEBUG | |
67 | if (timeout <= 0) | |
68 | snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", mpu401_read_stat(emu, mpu)); | |
69 | #endif | |
70 | } | |
71 | ||
72 | /* | |
73 | ||
74 | */ | |
75 | ||
eb4698f3 | 76 | static void do_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, unsigned int status) |
1da177e4 LT |
77 | { |
78 | unsigned char byte; | |
79 | ||
80 | if (midi->rmidi == NULL) { | |
81 | snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable); | |
82 | return; | |
83 | } | |
84 | ||
85 | spin_lock(&midi->input_lock); | |
86 | if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) { | |
87 | if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) { | |
88 | mpu401_clear_rx(emu, midi); | |
89 | } else { | |
90 | byte = mpu401_read_data(emu, midi); | |
91 | if (midi->substream_input) | |
92 | snd_rawmidi_receive(midi->substream_input, &byte, 1); | |
93 | } | |
94 | } | |
95 | spin_unlock(&midi->input_lock); | |
96 | ||
97 | spin_lock(&midi->output_lock); | |
98 | if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) { | |
99 | if (midi->substream_output && | |
100 | snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) { | |
101 | mpu401_write_data(emu, midi, byte); | |
102 | } else { | |
103 | snd_emu10k1_intr_disable(emu, midi->tx_enable); | |
104 | } | |
105 | } | |
106 | spin_unlock(&midi->output_lock); | |
107 | } | |
108 | ||
eb4698f3 | 109 | static void snd_emu10k1_midi_interrupt(struct snd_emu10k1 *emu, unsigned int status) |
1da177e4 LT |
110 | { |
111 | do_emu10k1_midi_interrupt(emu, &emu->midi, status); | |
112 | } | |
113 | ||
eb4698f3 | 114 | static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int status) |
1da177e4 LT |
115 | { |
116 | do_emu10k1_midi_interrupt(emu, &emu->midi2, status); | |
117 | } | |
118 | ||
b130807d | 119 | static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack) |
1da177e4 LT |
120 | { |
121 | unsigned long flags; | |
122 | int timeout, ok; | |
123 | ||
124 | spin_lock_irqsave(&midi->input_lock, flags); | |
125 | mpu401_write_data(emu, midi, 0x00); | |
126 | /* mpu401_clear_rx(emu, midi); */ | |
127 | ||
128 | mpu401_write_cmd(emu, midi, cmd); | |
129 | if (ack) { | |
130 | ok = 0; | |
131 | timeout = 10000; | |
132 | while (!ok && timeout-- > 0) { | |
133 | if (mpu401_input_avail(emu, midi)) { | |
134 | if (mpu401_read_data(emu, midi) == MPU401_ACK) | |
135 | ok = 1; | |
136 | } | |
137 | } | |
138 | if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK) | |
139 | ok = 1; | |
140 | } else { | |
141 | ok = 1; | |
142 | } | |
143 | spin_unlock_irqrestore(&midi->input_lock, flags); | |
b130807d | 144 | if (!ok) { |
1da177e4 LT |
145 | snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n", |
146 | cmd, emu->port, | |
147 | mpu401_read_stat(emu, midi), | |
148 | mpu401_read_data(emu, midi)); | |
b130807d RD |
149 | return 1; |
150 | } | |
151 | return 0; | |
1da177e4 LT |
152 | } |
153 | ||
eb4698f3 | 154 | static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 155 | { |
eb4698f3 TI |
156 | struct snd_emu10k1 *emu; |
157 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data; | |
1da177e4 LT |
158 | unsigned long flags; |
159 | ||
160 | emu = midi->emu; | |
161 | snd_assert(emu, return -ENXIO); | |
162 | spin_lock_irqsave(&midi->open_lock, flags); | |
163 | midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT; | |
164 | midi->substream_input = substream; | |
165 | if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) { | |
166 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
b130807d RD |
167 | if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1)) |
168 | goto error_out; | |
169 | if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1)) | |
170 | goto error_out; | |
1da177e4 LT |
171 | } else { |
172 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
173 | } | |
174 | return 0; | |
b130807d RD |
175 | |
176 | error_out: | |
177 | return -EIO; | |
1da177e4 LT |
178 | } |
179 | ||
eb4698f3 | 180 | static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 181 | { |
eb4698f3 TI |
182 | struct snd_emu10k1 *emu; |
183 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data; | |
1da177e4 LT |
184 | unsigned long flags; |
185 | ||
186 | emu = midi->emu; | |
187 | snd_assert(emu, return -ENXIO); | |
188 | spin_lock_irqsave(&midi->open_lock, flags); | |
189 | midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT; | |
190 | midi->substream_output = substream; | |
191 | if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) { | |
192 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
b130807d RD |
193 | if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1)) |
194 | goto error_out; | |
195 | if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1)) | |
196 | goto error_out; | |
1da177e4 LT |
197 | } else { |
198 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
199 | } | |
200 | return 0; | |
b130807d RD |
201 | |
202 | error_out: | |
203 | return -EIO; | |
1da177e4 LT |
204 | } |
205 | ||
eb4698f3 | 206 | static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 207 | { |
eb4698f3 TI |
208 | struct snd_emu10k1 *emu; |
209 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data; | |
1da177e4 | 210 | unsigned long flags; |
b130807d | 211 | int err = 0; |
1da177e4 LT |
212 | |
213 | emu = midi->emu; | |
214 | snd_assert(emu, return -ENXIO); | |
215 | spin_lock_irqsave(&midi->open_lock, flags); | |
216 | snd_emu10k1_intr_disable(emu, midi->rx_enable); | |
217 | midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT; | |
218 | midi->substream_input = NULL; | |
219 | if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) { | |
220 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
b130807d | 221 | err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0); |
1da177e4 LT |
222 | } else { |
223 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
224 | } | |
b130807d | 225 | return err; |
1da177e4 LT |
226 | } |
227 | ||
eb4698f3 | 228 | static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 229 | { |
eb4698f3 TI |
230 | struct snd_emu10k1 *emu; |
231 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data; | |
1da177e4 | 232 | unsigned long flags; |
b130807d | 233 | int err = 0; |
1da177e4 LT |
234 | |
235 | emu = midi->emu; | |
236 | snd_assert(emu, return -ENXIO); | |
237 | spin_lock_irqsave(&midi->open_lock, flags); | |
238 | snd_emu10k1_intr_disable(emu, midi->tx_enable); | |
239 | midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT; | |
240 | midi->substream_output = NULL; | |
241 | if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) { | |
242 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
b130807d | 243 | err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0); |
1da177e4 LT |
244 | } else { |
245 | spin_unlock_irqrestore(&midi->open_lock, flags); | |
246 | } | |
b130807d | 247 | return err; |
1da177e4 LT |
248 | } |
249 | ||
eb4698f3 | 250 | static void snd_emu10k1_midi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 251 | { |
eb4698f3 TI |
252 | struct snd_emu10k1 *emu; |
253 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data; | |
1da177e4 LT |
254 | emu = midi->emu; |
255 | snd_assert(emu, return); | |
256 | ||
257 | if (up) | |
258 | snd_emu10k1_intr_enable(emu, midi->rx_enable); | |
259 | else | |
260 | snd_emu10k1_intr_disable(emu, midi->rx_enable); | |
261 | } | |
262 | ||
eb4698f3 | 263 | static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substream, int up) |
1da177e4 | 264 | { |
eb4698f3 TI |
265 | struct snd_emu10k1 *emu; |
266 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data; | |
1da177e4 LT |
267 | unsigned long flags; |
268 | ||
269 | emu = midi->emu; | |
270 | snd_assert(emu, return); | |
271 | ||
272 | if (up) { | |
273 | int max = 4; | |
274 | unsigned char byte; | |
275 | ||
276 | /* try to send some amount of bytes here before interrupts */ | |
277 | spin_lock_irqsave(&midi->output_lock, flags); | |
278 | while (max > 0) { | |
279 | if (mpu401_output_ready(emu, midi)) { | |
280 | if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) || | |
281 | snd_rawmidi_transmit(substream, &byte, 1) != 1) { | |
282 | /* no more data */ | |
283 | spin_unlock_irqrestore(&midi->output_lock, flags); | |
284 | return; | |
285 | } | |
286 | mpu401_write_data(emu, midi, byte); | |
287 | max--; | |
288 | } else { | |
289 | break; | |
290 | } | |
291 | } | |
292 | spin_unlock_irqrestore(&midi->output_lock, flags); | |
293 | snd_emu10k1_intr_enable(emu, midi->tx_enable); | |
294 | } else { | |
295 | snd_emu10k1_intr_disable(emu, midi->tx_enable); | |
296 | } | |
297 | } | |
298 | ||
299 | /* | |
300 | ||
301 | */ | |
302 | ||
eb4698f3 | 303 | static struct snd_rawmidi_ops snd_emu10k1_midi_output = |
1da177e4 LT |
304 | { |
305 | .open = snd_emu10k1_midi_output_open, | |
306 | .close = snd_emu10k1_midi_output_close, | |
307 | .trigger = snd_emu10k1_midi_output_trigger, | |
308 | }; | |
309 | ||
eb4698f3 | 310 | static struct snd_rawmidi_ops snd_emu10k1_midi_input = |
1da177e4 LT |
311 | { |
312 | .open = snd_emu10k1_midi_input_open, | |
313 | .close = snd_emu10k1_midi_input_close, | |
314 | .trigger = snd_emu10k1_midi_input_trigger, | |
315 | }; | |
316 | ||
eb4698f3 | 317 | static void snd_emu10k1_midi_free(struct snd_rawmidi *rmidi) |
1da177e4 | 318 | { |
eb4698f3 | 319 | struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)rmidi->private_data; |
1da177e4 LT |
320 | midi->interrupt = NULL; |
321 | midi->rmidi = NULL; | |
322 | } | |
323 | ||
eb4698f3 | 324 | static int __devinit emu10k1_midi_init(struct snd_emu10k1 *emu, struct snd_emu10k1_midi *midi, int device, char *name) |
1da177e4 | 325 | { |
eb4698f3 | 326 | struct snd_rawmidi *rmidi; |
1da177e4 LT |
327 | int err; |
328 | ||
329 | if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0) | |
330 | return err; | |
331 | midi->emu = emu; | |
332 | spin_lock_init(&midi->open_lock); | |
333 | spin_lock_init(&midi->input_lock); | |
334 | spin_lock_init(&midi->output_lock); | |
335 | strcpy(rmidi->name, name); | |
336 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output); | |
337 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input); | |
338 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | | |
339 | SNDRV_RAWMIDI_INFO_INPUT | | |
340 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
341 | rmidi->private_data = midi; | |
342 | rmidi->private_free = snd_emu10k1_midi_free; | |
343 | midi->rmidi = rmidi; | |
344 | return 0; | |
345 | } | |
346 | ||
eb4698f3 | 347 | int __devinit snd_emu10k1_midi(struct snd_emu10k1 *emu) |
1da177e4 | 348 | { |
eb4698f3 | 349 | struct snd_emu10k1_midi *midi = &emu->midi; |
1da177e4 LT |
350 | int err; |
351 | ||
352 | if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0) | |
353 | return err; | |
354 | ||
355 | midi->tx_enable = INTE_MIDITXENABLE; | |
356 | midi->rx_enable = INTE_MIDIRXENABLE; | |
357 | midi->port = MUDATA; | |
358 | midi->ipr_tx = IPR_MIDITRANSBUFEMPTY; | |
359 | midi->ipr_rx = IPR_MIDIRECVBUFEMPTY; | |
360 | midi->interrupt = snd_emu10k1_midi_interrupt; | |
361 | return 0; | |
362 | } | |
363 | ||
eb4698f3 | 364 | int __devinit snd_emu10k1_audigy_midi(struct snd_emu10k1 *emu) |
1da177e4 | 365 | { |
eb4698f3 | 366 | struct snd_emu10k1_midi *midi; |
1da177e4 LT |
367 | int err; |
368 | ||
369 | midi = &emu->midi; | |
370 | if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0) | |
371 | return err; | |
372 | ||
373 | midi->tx_enable = INTE_MIDITXENABLE; | |
374 | midi->rx_enable = INTE_MIDIRXENABLE; | |
375 | midi->port = A_MUDATA1; | |
376 | midi->ipr_tx = IPR_MIDITRANSBUFEMPTY; | |
377 | midi->ipr_rx = IPR_MIDIRECVBUFEMPTY; | |
378 | midi->interrupt = snd_emu10k1_midi_interrupt; | |
379 | ||
380 | midi = &emu->midi2; | |
381 | if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0) | |
382 | return err; | |
383 | ||
384 | midi->tx_enable = INTE_A_MIDITXENABLE2; | |
385 | midi->rx_enable = INTE_A_MIDIRXENABLE2; | |
386 | midi->port = A_MUDATA2; | |
387 | midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2; | |
388 | midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2; | |
389 | midi->interrupt = snd_emu10k1_midi_interrupt2; | |
390 | return 0; | |
391 | } |