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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
43static void ca_midi_clear_rx(struct snd_ca_midi *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",
51 ca_midi_read_stat(midi));
52#endif
53}
54
55static void ca_midi_interrupt(struct snd_ca_midi *midi, unsigned int status)
56{
57 unsigned char byte;
58
59 if (midi->rmidi == NULL) {
60 midi->interrupt_disable(midi,midi->tx_enable | midi->rx_enable);
61 return;
62 }
63
64 spin_lock(&midi->input_lock);
65 if ((status & midi->ipr_rx) && ca_midi_input_avail(midi)) {
66 if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
67 ca_midi_clear_rx(midi);
68 } else {
69 byte = ca_midi_read_data(midi);
70 if(midi->substream_input)
71 snd_rawmidi_receive(midi->substream_input, &byte, 1);
72
73
74 }
75 }
76 spin_unlock(&midi->input_lock);
77
78 spin_lock(&midi->output_lock);
79 if ((status & midi->ipr_tx) && ca_midi_output_ready(midi)) {
80 if (midi->substream_output &&
81 snd_rawmidi_transmit(midi->substream_output, &byte, 1) == 1) {
82 ca_midi_write_data(midi, byte);
83 } else {
84 midi->interrupt_disable(midi,midi->tx_enable);
85 }
86 }
87 spin_unlock(&midi->output_lock);
88
89}
90
91static void ca_midi_cmd(struct snd_ca_midi *midi, unsigned char cmd, int ack)
92{
93 unsigned long flags;
94 int timeout, ok;
95
96 spin_lock_irqsave(&midi->input_lock, flags);
97 ca_midi_write_data(midi, 0x00);
98
99
100 ca_midi_write_cmd(midi, cmd);
101 if (ack) {
102 ok = 0;
103 timeout = 10000;
104 while (!ok && timeout-- > 0) {
105 if (ca_midi_input_avail(midi)) {
106 if (ca_midi_read_data(midi) == midi->ack)
107 ok = 1;
108 }
109 }
110 if (!ok && ca_midi_read_data(midi) == midi->ack)
111 ok = 1;
112 } else {
113 ok = 1;
114 }
115 spin_unlock_irqrestore(&midi->input_lock, flags);
116 if (!ok)
117 snd_printk(KERN_ERR "ca_midi_cmd: 0x%x failed at 0x%x (status = 0x%x, data = 0x%x)!!!\n",
118 cmd,
119 midi->get_dev_id_port(midi->dev_id),
120 ca_midi_read_stat(midi),
121 ca_midi_read_data(midi));
122}
123
124static int ca_midi_input_open(struct snd_rawmidi_substream *substream)
125{
126 struct snd_ca_midi *midi = substream->rmidi->private_data;
127 unsigned long flags;
128
129 snd_assert(midi->dev_id, 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 snd_assert(midi->dev_id, return -ENXIO);
149 spin_lock_irqsave(&midi->open_lock, flags);
150 midi->midi_mode |= CA_MIDI_MODE_OUTPUT;
151 midi->substream_output = substream;
152 if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
153 spin_unlock_irqrestore(&midi->open_lock, flags);
154 ca_midi_cmd(midi, midi->reset, 1);
155 ca_midi_cmd(midi, midi->enter_uart, 1);
156 } else {
157 spin_unlock_irqrestore(&midi->open_lock, flags);
158 }
159 return 0;
160}
161
162static int ca_midi_input_close(struct snd_rawmidi_substream *substream)
163{
164 struct snd_ca_midi *midi = substream->rmidi->private_data;
165 unsigned long flags;
166
167 snd_assert(midi->dev_id, return -ENXIO);
168 spin_lock_irqsave(&midi->open_lock, flags);
169 midi->interrupt_disable(midi,midi->rx_enable);
170 midi->midi_mode &= ~CA_MIDI_MODE_INPUT;
171 midi->substream_input = NULL;
172 if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT)) {
173 spin_unlock_irqrestore(&midi->open_lock, flags);
174 ca_midi_cmd(midi, midi->reset, 0);
175 } else {
176 spin_unlock_irqrestore(&midi->open_lock, flags);
177 }
178 return 0;
179}
180
181static int ca_midi_output_close(struct snd_rawmidi_substream *substream)
182{
183 struct snd_ca_midi *midi = substream->rmidi->private_data;
184 unsigned long flags;
185 snd_assert(midi->dev_id, return -ENXIO);
186
187 spin_lock_irqsave(&midi->open_lock, flags);
188
189 midi->interrupt_disable(midi,midi->tx_enable);
190 midi->midi_mode &= ~CA_MIDI_MODE_OUTPUT;
191 midi->substream_output = NULL;
192
193 if (!(midi->midi_mode & CA_MIDI_MODE_INPUT)) {
194 spin_unlock_irqrestore(&midi->open_lock, flags);
195 ca_midi_cmd(midi, midi->reset, 0);
196 } else {
197 spin_unlock_irqrestore(&midi->open_lock, flags);
198 }
199 return 0;
200}
201
202static void ca_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
203{
204 struct snd_ca_midi *midi = substream->rmidi->private_data;
205 snd_assert(midi->dev_id, return);
206
207 if (up) {
208 midi->interrupt_enable(midi,midi->rx_enable);
209 } else {
210 midi->interrupt_disable(midi, midi->rx_enable);
211 }
212}
213
214static void ca_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
215{
216 struct snd_ca_midi *midi = substream->rmidi->private_data;
217 unsigned long flags;
218
219 snd_assert(midi->dev_id, return);
220
221 if (up) {
222 int max = 4;
223 unsigned char byte;
224
225 spin_lock_irqsave(&midi->output_lock, flags);
226
227
228 while (max > 0) {
229 if (ca_midi_output_ready(midi)) {
230 if (!(midi->midi_mode & CA_MIDI_MODE_OUTPUT) ||
231 snd_rawmidi_transmit(substream, &byte, 1) != 1) {
232
233 spin_unlock_irqrestore(&midi->output_lock, flags);
234 return;
235 }
236 ca_midi_write_data(midi, byte);
237 max--;
238 } else {
239 break;
240 }
241 }
242
243 spin_unlock_irqrestore(&midi->output_lock, flags);
244 midi->interrupt_enable(midi,midi->tx_enable);
245
246 } else {
247 midi->interrupt_disable(midi,midi->tx_enable);
248 }
249}
250
251static struct snd_rawmidi_ops ca_midi_output =
252{
253 .open = ca_midi_output_open,
254 .close = ca_midi_output_close,
255 .trigger = ca_midi_output_trigger,
256};
257
258static struct snd_rawmidi_ops ca_midi_input =
259{
260 .open = ca_midi_input_open,
261 .close = ca_midi_input_close,
262 .trigger = ca_midi_input_trigger,
263};
264
265static void ca_midi_free(struct snd_ca_midi *midi)
266{
267 midi->interrupt = NULL;
268 midi->interrupt_enable = NULL;
269 midi->interrupt_disable = NULL;
270 midi->read = NULL;
271 midi->write = NULL;
272 midi->get_dev_id_card = NULL;
273 midi->get_dev_id_port = NULL;
274 midi->rmidi = NULL;
275}
276
277static void ca_rmidi_free(struct snd_rawmidi *rmidi)
278{
279 ca_midi_free(rmidi->private_data);
280}
281
282int __devinit ca_midi_init(void *dev_id, struct snd_ca_midi *midi, int device, char *name)
283{
284 struct snd_rawmidi *rmidi;
285 int err;
286
287 if ((err = snd_rawmidi_new(midi->get_dev_id_card(midi->dev_id), name, device, 1, 1, &rmidi)) < 0)
288 return err;
289
290 midi->dev_id = dev_id;
291 midi->interrupt = ca_midi_interrupt;
292
293 spin_lock_init(&midi->open_lock);
294 spin_lock_init(&midi->input_lock);
295 spin_lock_init(&midi->output_lock);
296
297 strcpy(rmidi->name, name);
298 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &ca_midi_output);
299 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &ca_midi_input);
300 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT |
301 SNDRV_RAWMIDI_INFO_INPUT |
302 SNDRV_RAWMIDI_INFO_DUPLEX;
303 rmidi->private_data = midi;
304 rmidi->private_free = ca_rmidi_free;
305
306 midi->rmidi = rmidi;
307 return 0;
308}
309
310
