~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/pci/ca0106/ca_midi.c

Version: ~ [ linux-5.6-rc3 ] ~ [ linux-5.5.6 ] ~ [ linux-5.4.22 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.106 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.171 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.214 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.214 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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.
  9  *    mpu401: Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 10  *    emu10k1x: Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
 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/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 
 42 static void ca_midi_clear_rx(struct snd_ca_midi *midi)
 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)
 49                 pr_err("ca_midi_clear_rx: timeout (status = 0x%x)\n",
 50                            ca_midi_read_stat(midi));
 51 #endif
 52 }
 53 
 54 static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
 55 {
 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 
 90 static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
 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)
116                 pr_err("ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
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 
123 static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
124 {
125         struct snd_ca_midi *midi = substream->rmidi->private_data;
126         unsigned long flags;
127         
128         if (snd_BUG_ON(!midi->dev_id))
129                 return -ENXIO;
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 
143 static int ca_midi_output_open(struct snd_rawmidi_substream *substream)
144 {
145         struct snd_ca_midi *midi = substream->rmidi->private_data;
146         unsigned long flags;
147 
148         if (snd_BUG_ON(!midi->dev_id))
149                 return -ENXIO;
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 
163 static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
164 {
165         struct snd_ca_midi *midi = substream->rmidi->private_data;
166         unsigned long flags;
167 
168         if (snd_BUG_ON(!midi->dev_id))
169                 return -ENXIO;
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 
183 static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
184 {
185         struct snd_ca_midi *midi = substream->rmidi->private_data;
186         unsigned long flags;
187 
188         if (snd_BUG_ON(!midi->dev_id))
189                 return -ENXIO;
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 
206 static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
207 {
208         struct snd_ca_midi *midi = substream->rmidi->private_data;
209 
210         if (snd_BUG_ON(!midi->dev_id))
211                 return;
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 
220 static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
221 {
222         struct snd_ca_midi *midi = substream->rmidi->private_data;
223         unsigned long flags;
224 
225         if (snd_BUG_ON(!midi->dev_id))
226                 return;
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 
258 static const struct snd_rawmidi_ops ca_midi_output =
259 {
260         .open =         ca_midi_output_open,
261         .close =        ca_midi_output_close,
262         .trigger =      ca_midi_output_trigger,
263 };
264 
265 static const struct snd_rawmidi_ops ca_midi_input =
266 {
267         .open =         ca_midi_input_open,
268         .close =        ca_midi_input_close,
269         .trigger =      ca_midi_input_trigger,
270 };
271 
272 static void ca_midi_free(struct snd_ca_midi *midi)
273 {
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 
284 static void ca_rmidi_free(struct snd_rawmidi *rmidi)
285 {
286         ca_midi_free(rmidi->private_data);
287 }
288 
289 int ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name)
290 {
291         struct snd_rawmidi *rmidi;
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 
317 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp