2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Routines for control of EMU10K1 MPU-401 in UART mode
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.
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.
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
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>
28 #define EMU10K1_MIDI_MODE_INPUT (1<<0)
29 #define EMU10K1_MIDI_MODE_OUTPUT (1<<1)
31 static inline unsigned char mpu401_read(emu10k1_t *emu, emu10k1_midi_t *mpu, int idx)
34 return (unsigned char)snd_emu10k1_ptr_read(emu, mpu->port + idx, 0);
36 return inb(emu->port + mpu->port + idx);
39 static inline void mpu401_write(emu10k1_t *emu, emu10k1_midi_t *mpu, int data, int idx)
42 snd_emu10k1_ptr_write(emu, mpu->port + idx, 0, data);
44 outb(data, emu->port + mpu->port + idx);
47 #define mpu401_write_data(emu, mpu, data) mpu401_write(emu, mpu, data, 0)
48 #define mpu401_write_cmd(emu, mpu, data) mpu401_write(emu, mpu, data, 1)
49 #define mpu401_read_data(emu, mpu) mpu401_read(emu, mpu, 0)
50 #define mpu401_read_stat(emu, mpu) mpu401_read(emu, mpu, 1)
52 #define mpu401_input_avail(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x80))
53 #define mpu401_output_ready(emu,mpu) (!(mpu401_read_stat(emu,mpu) & 0x40))
55 #define MPU401_RESET 0xff
56 #define MPU401_ENTER_UART 0x3f
57 #define MPU401_ACK 0xfe
59 static void mpu401_clear_rx(emu10k1_t *emu, emu10k1_midi_t *mpu)
62 for (; timeout > 0 && mpu401_input_avail(emu, mpu); timeout--)
63 mpu401_read_data(emu, mpu);
64 #ifdef CONFIG_SND_DEBUG
66 snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", mpu401_read_stat(emu, mpu));
74 static void do_emu10k1_midi_interrupt(emu10k1_t *emu, emu10k1_midi_t *midi, unsigned int status)
78 if (midi->rmidi == NULL) {
79 snd_emu10k1_intr_disable(emu, midi->tx_enable | midi->rx_enable);
83 spin_lock(&midi->input_lock);
84 if ((status & midi->ipr_rx) && mpu401_input_avail(emu, midi)) {
85 if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
86 mpu401_clear_rx(emu, midi);
88 byte = mpu401_read_data(emu, midi);
89 if (midi->substream_input)
90 snd_rawmidi_receive(midi->substream_input, &byte, 1);
93 spin_unlock(&midi->input_lock);
95 spin_lock(&midi->output_lock);
96 if ((status & midi->ipr_tx) && mpu401_output_ready(emu, midi)) {
97 if (midi->substream_output &&
98 snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
99 mpu401_write_data(emu, midi, byte);
101 snd_emu10k1_intr_disable(emu, midi->tx_enable);
104 spin_unlock(&midi->output_lock);
107 static void snd_emu10k1_midi_interrupt(emu10k1_t *emu, unsigned int status)
109 do_emu10k1_midi_interrupt(emu, &emu->midi, status);
112 static void snd_emu10k1_midi_interrupt2(emu10k1_t *emu, unsigned int status)
114 do_emu10k1_midi_interrupt(emu, &emu->midi2, status);
117 static void snd_emu10k1_midi_cmd(emu10k1_t * emu, emu10k1_midi_t *midi, unsigned char cmd, int ack)
122 spin_lock_irqsave(&midi->input_lock, flags);
123 mpu401_write_data(emu, midi, 0x00);
124 /* mpu401_clear_rx(emu, midi); */
126 mpu401_write_cmd(emu, midi, cmd);
130 while (!ok && timeout-- > 0) {
131 if (mpu401_input_avail(emu, midi)) {
132 if (mpu401_read_data(emu, midi) == MPU401_ACK)
136 if (!ok && mpu401_read_data(emu, midi) == MPU401_ACK)
141 spin_unlock_irqrestore(&midi->input_lock, flags);
143 snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
145 mpu401_read_stat(emu, midi),
146 mpu401_read_data(emu, midi));
149 static int snd_emu10k1_midi_input_open(snd_rawmidi_substream_t * substream)
152 emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
156 snd_assert(emu, return -ENXIO);
157 spin_lock_irqsave(&midi->open_lock, flags);
158 midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
159 midi->substream_input = substream;
160 if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
161 spin_unlock_irqrestore(&midi->open_lock, flags);
162 snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1);
163 snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
165 spin_unlock_irqrestore(&midi->open_lock, flags);
170 static int snd_emu10k1_midi_output_open(snd_rawmidi_substream_t * substream)
173 emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
177 snd_assert(emu, return -ENXIO);
178 spin_lock_irqsave(&midi->open_lock, flags);
179 midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
180 midi->substream_output = substream;
181 if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
182 spin_unlock_irqrestore(&midi->open_lock, flags);
183 snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1);
184 snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
186 spin_unlock_irqrestore(&midi->open_lock, flags);
191 static int snd_emu10k1_midi_input_close(snd_rawmidi_substream_t * substream)
194 emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
198 snd_assert(emu, return -ENXIO);
199 spin_lock_irqsave(&midi->open_lock, flags);
200 snd_emu10k1_intr_disable(emu, midi->rx_enable);
201 midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
202 midi->substream_input = NULL;
203 if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
204 spin_unlock_irqrestore(&midi->open_lock, flags);
205 snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
207 spin_unlock_irqrestore(&midi->open_lock, flags);
212 static int snd_emu10k1_midi_output_close(snd_rawmidi_substream_t * substream)
215 emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
219 snd_assert(emu, return -ENXIO);
220 spin_lock_irqsave(&midi->open_lock, flags);
221 snd_emu10k1_intr_disable(emu, midi->tx_enable);
222 midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
223 midi->substream_output = NULL;
224 if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
225 spin_unlock_irqrestore(&midi->open_lock, flags);
226 snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
228 spin_unlock_irqrestore(&midi->open_lock, flags);
233 static void snd_emu10k1_midi_input_trigger(snd_rawmidi_substream_t * substream, int up)
236 emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
238 snd_assert(emu, return);
241 snd_emu10k1_intr_enable(emu, midi->rx_enable);
243 snd_emu10k1_intr_disable(emu, midi->rx_enable);
246 static void snd_emu10k1_midi_output_trigger(snd_rawmidi_substream_t * substream, int up)
249 emu10k1_midi_t *midi = (emu10k1_midi_t *)substream->rmidi->private_data;
253 snd_assert(emu, return);
259 /* try to send some amount of bytes here before interrupts */
260 spin_lock_irqsave(&midi->output_lock, flags);
262 if (mpu401_output_ready(emu, midi)) {
263 if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
264 snd_rawmidi_transmit(substream, &byte, 1) != 1) {
266 spin_unlock_irqrestore(&midi->output_lock, flags);
269 mpu401_write_data(emu, midi, byte);
275 spin_unlock_irqrestore(&midi->output_lock, flags);
276 snd_emu10k1_intr_enable(emu, midi->tx_enable);
278 snd_emu10k1_intr_disable(emu, midi->tx_enable);
286 static snd_rawmidi_ops_t snd_emu10k1_midi_output =
288 .open = snd_emu10k1_midi_output_open,
289 .close = snd_emu10k1_midi_output_close,
290 .trigger = snd_emu10k1_midi_output_trigger,
293 static snd_rawmidi_ops_t snd_emu10k1_midi_input =
295 .open = snd_emu10k1_midi_input_open,
296 .close = snd_emu10k1_midi_input_close,
297 .trigger = snd_emu10k1_midi_input_trigger,
300 static void snd_emu10k1_midi_free(snd_rawmidi_t *rmidi)
302 emu10k1_midi_t *midi = (emu10k1_midi_t *)rmidi->private_data;
303 midi->interrupt = NULL;
307 static int __devinit emu10k1_midi_init(emu10k1_t *emu, emu10k1_midi_t *midi, int device, char *name)
309 snd_rawmidi_t *rmidi;
312 if ((err = snd_rawmidi_new(emu->card, name, device, 1, 1, &rmidi)) < 0)
315 spin_lock_init(&midi->open_lock);
316 spin_lock_init(&midi->input_lock);
317 spin_lock_init(&midi->output_lock);
318 strcpy(rmidi->name, name);
319 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_emu10k1_midi_output);
320 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_emu10k1_midi_input);
321 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
322 SNDRV_RAWMIDI_INFO_INPUT |
323 SNDRV_RAWMIDI_INFO_DUPLEX;
324 rmidi->private_data = midi;
325 rmidi->private_free = snd_emu10k1_midi_free;
330 int __devinit snd_emu10k1_midi(emu10k1_t *emu)
332 emu10k1_midi_t *midi = &emu->midi;
335 if ((err = emu10k1_midi_init(emu, midi, 0, "EMU10K1 MPU-401 (UART)")) < 0)
338 midi->tx_enable = INTE_MIDITXENABLE;
339 midi->rx_enable = INTE_MIDIRXENABLE;
341 midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
342 midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
343 midi->interrupt = snd_emu10k1_midi_interrupt;
347 int __devinit snd_emu10k1_audigy_midi(emu10k1_t *emu)
349 emu10k1_midi_t *midi;
353 if ((err = emu10k1_midi_init(emu, midi, 0, "Audigy MPU-401 (UART)")) < 0)
356 midi->tx_enable = INTE_MIDITXENABLE;
357 midi->rx_enable = INTE_MIDIRXENABLE;
358 midi->port = A_MUDATA1;
359 midi->ipr_tx = IPR_MIDITRANSBUFEMPTY;
360 midi->ipr_rx = IPR_MIDIRECVBUFEMPTY;
361 midi->interrupt = snd_emu10k1_midi_interrupt;
364 if ((err = emu10k1_midi_init(emu, midi, 1, "Audigy MPU-401 #2")) < 0)
367 midi->tx_enable = INTE_A_MIDITXENABLE2;
368 midi->rx_enable = INTE_A_MIDIRXENABLE2;
369 midi->port = A_MUDATA2;
370 midi->ipr_tx = IPR_A_MIDITRANSBUFEMPTY2;
371 midi->ipr_rx = IPR_A_MIDIRECVBUFEMPTY2;
372 midi->interrupt = snd_emu10k1_midi_interrupt2;