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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
42static 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 snd_printk(KERN_ERR "ca_midi_clear_rx: timeout (status = 0x%x)\n",
50 ca_midi_read_stat(midi));
51#endif
52}
53
54static 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
90static 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
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 snd_printk(KERN_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
123static 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
143static 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
163static 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
183static 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
206static 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
220static 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
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
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
258static 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
265static 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
272static 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
284static void ca_rmidi_free(struct snd_rawmidi *rmidi)
285{
286 ca_midi_free(rmidi->private_data);
287}
288
289int __devinit 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
