Commit | Line | Data |
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d5daf49b DM |
1 | /* |
2 | * f_midi.c -- USB MIDI class function driver | |
3 | * | |
4 | * Copyright (C) 2006 Thumtronics Pty Ltd. | |
5 | * Developed for Thumtronics by Grey Innovation | |
6 | * Ben Williamson <ben.williamson@greyinnovation.com> | |
7 | * | |
8 | * Rewritten for the composite framework | |
9 | * Copyright (C) 2011 Daniel Mack <zonque@gmail.com> | |
10 | * | |
11 | * Based on drivers/usb/gadget/f_audio.c, | |
12 | * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org> | |
13 | * Copyright (C) 2008 Analog Devices, Inc | |
14 | * | |
15 | * and drivers/usb/gadget/midi.c, | |
16 | * Copyright (C) 2006 Thumtronics Pty Ltd. | |
17 | * Ben Williamson <ben.williamson@greyinnovation.com> | |
18 | * | |
19 | * Licensed under the GPL-2 or later. | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
b85e9de9 | 23 | #include <linux/module.h> |
d5daf49b | 24 | #include <linux/slab.h> |
d5daf49b DM |
25 | #include <linux/device.h> |
26 | ||
27 | #include <sound/core.h> | |
28 | #include <sound/initval.h> | |
29 | #include <sound/rawmidi.h> | |
30 | ||
31 | #include <linux/usb/ch9.h> | |
32 | #include <linux/usb/gadget.h> | |
33 | #include <linux/usb/audio.h> | |
34 | #include <linux/usb/midi.h> | |
35 | ||
1efd54ea | 36 | #include "u_f.h" |
b85e9de9 | 37 | #include "u_midi.h" |
1efd54ea | 38 | |
d5daf49b DM |
39 | MODULE_AUTHOR("Ben Williamson"); |
40 | MODULE_LICENSE("GPL v2"); | |
41 | ||
42 | static const char f_midi_shortname[] = "f_midi"; | |
43 | static const char f_midi_longname[] = "MIDI Gadget"; | |
44 | ||
c8933c3f DM |
45 | /* |
46 | * We can only handle 16 cables on one single endpoint, as cable numbers are | |
47 | * stored in 4-bit fields. And as the interface currently only holds one | |
48 | * single endpoint, this is the maximum number of ports we can allow. | |
49 | */ | |
50 | #define MAX_PORTS 16 | |
51 | ||
d5daf49b DM |
52 | /* |
53 | * This is a gadget, and the IN/OUT naming is from the host's perspective. | |
54 | * USB -> OUT endpoint -> rawmidi | |
55 | * USB <- IN endpoint <- rawmidi | |
56 | */ | |
57 | struct gmidi_in_port { | |
58 | struct f_midi *midi; | |
59 | int active; | |
c8933c3f | 60 | uint8_t cable; |
d5daf49b DM |
61 | uint8_t state; |
62 | #define STATE_UNKNOWN 0 | |
63 | #define STATE_1PARAM 1 | |
64 | #define STATE_2PARAM_1 2 | |
65 | #define STATE_2PARAM_2 3 | |
66 | #define STATE_SYSEX_0 4 | |
67 | #define STATE_SYSEX_1 5 | |
68 | #define STATE_SYSEX_2 6 | |
69 | uint8_t data[2]; | |
70 | }; | |
71 | ||
72 | struct f_midi { | |
73 | struct usb_function func; | |
74 | struct usb_gadget *gadget; | |
75 | struct usb_ep *in_ep, *out_ep; | |
76 | struct snd_card *card; | |
77 | struct snd_rawmidi *rmidi; | |
d5daf49b | 78 | |
c8933c3f DM |
79 | struct snd_rawmidi_substream *in_substream[MAX_PORTS]; |
80 | struct snd_rawmidi_substream *out_substream[MAX_PORTS]; | |
81 | struct gmidi_in_port *in_port[MAX_PORTS]; | |
82 | ||
d5daf49b DM |
83 | unsigned long out_triggered; |
84 | struct tasklet_struct tasklet; | |
c8933c3f DM |
85 | unsigned int in_ports; |
86 | unsigned int out_ports; | |
d5daf49b DM |
87 | int index; |
88 | char *id; | |
89 | unsigned int buflen, qlen; | |
90 | }; | |
91 | ||
92 | static inline struct f_midi *func_to_midi(struct usb_function *f) | |
93 | { | |
94 | return container_of(f, struct f_midi, func); | |
95 | } | |
96 | ||
97 | static void f_midi_transmit(struct f_midi *midi, struct usb_request *req); | |
98 | ||
99 | DECLARE_UAC_AC_HEADER_DESCRIPTOR(1); | |
100 | DECLARE_USB_MIDI_OUT_JACK_DESCRIPTOR(1); | |
c8933c3f | 101 | DECLARE_USB_MS_ENDPOINT_DESCRIPTOR(16); |
d5daf49b DM |
102 | |
103 | /* B.3.1 Standard AC Interface Descriptor */ | |
b85e9de9 | 104 | static struct usb_interface_descriptor ac_interface_desc = { |
d5daf49b DM |
105 | .bLength = USB_DT_INTERFACE_SIZE, |
106 | .bDescriptorType = USB_DT_INTERFACE, | |
107 | /* .bInterfaceNumber = DYNAMIC */ | |
108 | /* .bNumEndpoints = DYNAMIC */ | |
109 | .bInterfaceClass = USB_CLASS_AUDIO, | |
110 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, | |
111 | /* .iInterface = DYNAMIC */ | |
112 | }; | |
113 | ||
114 | /* B.3.2 Class-Specific AC Interface Descriptor */ | |
b85e9de9 | 115 | static struct uac1_ac_header_descriptor_1 ac_header_desc = { |
d5daf49b DM |
116 | .bLength = UAC_DT_AC_HEADER_SIZE(1), |
117 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
118 | .bDescriptorSubtype = USB_MS_HEADER, | |
119 | .bcdADC = cpu_to_le16(0x0100), | |
120 | .wTotalLength = cpu_to_le16(UAC_DT_AC_HEADER_SIZE(1)), | |
121 | .bInCollection = 1, | |
122 | /* .baInterfaceNr = DYNAMIC */ | |
123 | }; | |
124 | ||
125 | /* B.4.1 Standard MS Interface Descriptor */ | |
b85e9de9 | 126 | static struct usb_interface_descriptor ms_interface_desc = { |
d5daf49b DM |
127 | .bLength = USB_DT_INTERFACE_SIZE, |
128 | .bDescriptorType = USB_DT_INTERFACE, | |
129 | /* .bInterfaceNumber = DYNAMIC */ | |
130 | .bNumEndpoints = 2, | |
131 | .bInterfaceClass = USB_CLASS_AUDIO, | |
132 | .bInterfaceSubClass = USB_SUBCLASS_MIDISTREAMING, | |
133 | /* .iInterface = DYNAMIC */ | |
134 | }; | |
135 | ||
136 | /* B.4.2 Class-Specific MS Interface Descriptor */ | |
b85e9de9 | 137 | static struct usb_ms_header_descriptor ms_header_desc = { |
d5daf49b DM |
138 | .bLength = USB_DT_MS_HEADER_SIZE, |
139 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
140 | .bDescriptorSubtype = USB_MS_HEADER, | |
141 | .bcdMSC = cpu_to_le16(0x0100), | |
c8933c3f | 142 | /* .wTotalLength = DYNAMIC */ |
d5daf49b DM |
143 | }; |
144 | ||
d5daf49b DM |
145 | /* B.5.1 Standard Bulk OUT Endpoint Descriptor */ |
146 | static struct usb_endpoint_descriptor bulk_out_desc = { | |
147 | .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, | |
148 | .bDescriptorType = USB_DT_ENDPOINT, | |
149 | .bEndpointAddress = USB_DIR_OUT, | |
150 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
151 | }; | |
152 | ||
153 | /* B.5.2 Class-specific MS Bulk OUT Endpoint Descriptor */ | |
c8933c3f DM |
154 | static struct usb_ms_endpoint_descriptor_16 ms_out_desc = { |
155 | /* .bLength = DYNAMIC */ | |
d5daf49b DM |
156 | .bDescriptorType = USB_DT_CS_ENDPOINT, |
157 | .bDescriptorSubtype = USB_MS_GENERAL, | |
c8933c3f DM |
158 | /* .bNumEmbMIDIJack = DYNAMIC */ |
159 | /* .baAssocJackID = DYNAMIC */ | |
d5daf49b DM |
160 | }; |
161 | ||
162 | /* B.6.1 Standard Bulk IN Endpoint Descriptor */ | |
163 | static struct usb_endpoint_descriptor bulk_in_desc = { | |
164 | .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, | |
165 | .bDescriptorType = USB_DT_ENDPOINT, | |
166 | .bEndpointAddress = USB_DIR_IN, | |
167 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
168 | }; | |
169 | ||
170 | /* B.6.2 Class-specific MS Bulk IN Endpoint Descriptor */ | |
c8933c3f DM |
171 | static struct usb_ms_endpoint_descriptor_16 ms_in_desc = { |
172 | /* .bLength = DYNAMIC */ | |
d5daf49b DM |
173 | .bDescriptorType = USB_DT_CS_ENDPOINT, |
174 | .bDescriptorSubtype = USB_MS_GENERAL, | |
c8933c3f DM |
175 | /* .bNumEmbMIDIJack = DYNAMIC */ |
176 | /* .baAssocJackID = DYNAMIC */ | |
d5daf49b DM |
177 | }; |
178 | ||
179 | /* string IDs are assigned dynamically */ | |
180 | ||
181 | #define STRING_FUNC_IDX 0 | |
182 | ||
183 | static struct usb_string midi_string_defs[] = { | |
184 | [STRING_FUNC_IDX].s = "MIDI function", | |
185 | { } /* end of list */ | |
186 | }; | |
187 | ||
188 | static struct usb_gadget_strings midi_stringtab = { | |
189 | .language = 0x0409, /* en-us */ | |
190 | .strings = midi_string_defs, | |
191 | }; | |
192 | ||
193 | static struct usb_gadget_strings *midi_strings[] = { | |
194 | &midi_stringtab, | |
195 | NULL, | |
196 | }; | |
197 | ||
1efd54ea AP |
198 | static inline struct usb_request *midi_alloc_ep_req(struct usb_ep *ep, |
199 | unsigned length) | |
d5daf49b | 200 | { |
1efd54ea | 201 | return alloc_ep_req(ep, length, length); |
d5daf49b DM |
202 | } |
203 | ||
204 | static void free_ep_req(struct usb_ep *ep, struct usb_request *req) | |
205 | { | |
206 | kfree(req->buf); | |
207 | usb_ep_free_request(ep, req); | |
208 | } | |
209 | ||
210 | static const uint8_t f_midi_cin_length[] = { | |
211 | 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1 | |
212 | }; | |
213 | ||
214 | /* | |
215 | * Receives a chunk of MIDI data. | |
216 | */ | |
217 | static void f_midi_read_data(struct usb_ep *ep, int cable, | |
218 | uint8_t *data, int length) | |
219 | { | |
220 | struct f_midi *midi = ep->driver_data; | |
c8933c3f | 221 | struct snd_rawmidi_substream *substream = midi->out_substream[cable]; |
d5daf49b | 222 | |
c8933c3f | 223 | if (!substream) |
d5daf49b DM |
224 | /* Nobody is listening - throw it on the floor. */ |
225 | return; | |
226 | ||
c8933c3f | 227 | if (!test_bit(cable, &midi->out_triggered)) |
d5daf49b DM |
228 | return; |
229 | ||
c8933c3f | 230 | snd_rawmidi_receive(substream, data, length); |
d5daf49b DM |
231 | } |
232 | ||
233 | static void f_midi_handle_out_data(struct usb_ep *ep, struct usb_request *req) | |
234 | { | |
235 | unsigned int i; | |
236 | u8 *buf = req->buf; | |
237 | ||
238 | for (i = 0; i + 3 < req->actual; i += 4) | |
239 | if (buf[i] != 0) { | |
240 | int cable = buf[i] >> 4; | |
241 | int length = f_midi_cin_length[buf[i] & 0x0f]; | |
242 | f_midi_read_data(ep, cable, &buf[i + 1], length); | |
243 | } | |
244 | } | |
245 | ||
246 | static void | |
247 | f_midi_complete(struct usb_ep *ep, struct usb_request *req) | |
248 | { | |
249 | struct f_midi *midi = ep->driver_data; | |
250 | struct usb_composite_dev *cdev = midi->func.config->cdev; | |
251 | int status = req->status; | |
252 | ||
253 | switch (status) { | |
254 | case 0: /* normal completion */ | |
255 | if (ep == midi->out_ep) { | |
256 | /* We received stuff. req is queued again, below */ | |
257 | f_midi_handle_out_data(ep, req); | |
258 | } else if (ep == midi->in_ep) { | |
259 | /* Our transmit completed. See if there's more to go. | |
260 | * f_midi_transmit eats req, don't queue it again. */ | |
261 | f_midi_transmit(midi, req); | |
262 | return; | |
263 | } | |
264 | break; | |
265 | ||
266 | /* this endpoint is normally active while we're configured */ | |
267 | case -ECONNABORTED: /* hardware forced ep reset */ | |
268 | case -ECONNRESET: /* request dequeued */ | |
269 | case -ESHUTDOWN: /* disconnect from host */ | |
270 | VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status, | |
271 | req->actual, req->length); | |
272 | if (ep == midi->out_ep) | |
273 | f_midi_handle_out_data(ep, req); | |
274 | ||
275 | free_ep_req(ep, req); | |
276 | return; | |
277 | ||
278 | case -EOVERFLOW: /* buffer overrun on read means that | |
279 | * we didn't provide a big enough buffer. | |
280 | */ | |
281 | default: | |
282 | DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name, | |
283 | status, req->actual, req->length); | |
284 | break; | |
285 | case -EREMOTEIO: /* short read */ | |
286 | break; | |
287 | } | |
288 | ||
289 | status = usb_ep_queue(ep, req, GFP_ATOMIC); | |
290 | if (status) { | |
291 | ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n", | |
292 | ep->name, req->length, status); | |
293 | usb_ep_set_halt(ep); | |
294 | /* FIXME recover later ... somehow */ | |
295 | } | |
296 | } | |
297 | ||
298 | static int f_midi_start_ep(struct f_midi *midi, | |
299 | struct usb_function *f, | |
300 | struct usb_ep *ep) | |
301 | { | |
302 | int err; | |
303 | struct usb_composite_dev *cdev = f->config->cdev; | |
304 | ||
ce723951 | 305 | usb_ep_disable(ep); |
d5daf49b DM |
306 | |
307 | err = config_ep_by_speed(midi->gadget, f, ep); | |
308 | if (err) { | |
309 | ERROR(cdev, "can't configure %s: %d\n", ep->name, err); | |
310 | return err; | |
311 | } | |
312 | ||
313 | err = usb_ep_enable(ep); | |
314 | if (err) { | |
315 | ERROR(cdev, "can't start %s: %d\n", ep->name, err); | |
316 | return err; | |
317 | } | |
318 | ||
319 | ep->driver_data = midi; | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
325 | { | |
326 | struct f_midi *midi = func_to_midi(f); | |
327 | struct usb_composite_dev *cdev = f->config->cdev; | |
328 | unsigned i; | |
329 | int err; | |
330 | ||
4ef7a4a1 RB |
331 | /* For Control Device interface we do nothing */ |
332 | if (intf == 0) | |
333 | return 0; | |
334 | ||
d5daf49b DM |
335 | err = f_midi_start_ep(midi, f, midi->in_ep); |
336 | if (err) | |
337 | return err; | |
338 | ||
339 | err = f_midi_start_ep(midi, f, midi->out_ep); | |
340 | if (err) | |
341 | return err; | |
342 | ||
ce723951 | 343 | usb_ep_disable(midi->out_ep); |
d5daf49b DM |
344 | |
345 | err = config_ep_by_speed(midi->gadget, f, midi->out_ep); | |
346 | if (err) { | |
347 | ERROR(cdev, "can't configure %s: %d\n", | |
348 | midi->out_ep->name, err); | |
349 | return err; | |
350 | } | |
351 | ||
352 | err = usb_ep_enable(midi->out_ep); | |
353 | if (err) { | |
354 | ERROR(cdev, "can't start %s: %d\n", | |
355 | midi->out_ep->name, err); | |
356 | return err; | |
357 | } | |
358 | ||
359 | midi->out_ep->driver_data = midi; | |
360 | ||
361 | /* allocate a bunch of read buffers and queue them all at once. */ | |
362 | for (i = 0; i < midi->qlen && err == 0; i++) { | |
363 | struct usb_request *req = | |
1efd54ea | 364 | midi_alloc_ep_req(midi->out_ep, midi->buflen); |
d5daf49b DM |
365 | if (req == NULL) |
366 | return -ENOMEM; | |
367 | ||
368 | req->complete = f_midi_complete; | |
369 | err = usb_ep_queue(midi->out_ep, req, GFP_ATOMIC); | |
370 | if (err) { | |
371 | ERROR(midi, "%s queue req: %d\n", | |
372 | midi->out_ep->name, err); | |
373 | } | |
374 | } | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static void f_midi_disable(struct usb_function *f) | |
380 | { | |
381 | struct f_midi *midi = func_to_midi(f); | |
382 | struct usb_composite_dev *cdev = f->config->cdev; | |
383 | ||
384 | DBG(cdev, "disable\n"); | |
385 | ||
386 | /* | |
387 | * just disable endpoints, forcing completion of pending i/o. | |
388 | * all our completion handlers free their requests in this case. | |
389 | */ | |
390 | usb_ep_disable(midi->in_ep); | |
391 | usb_ep_disable(midi->out_ep); | |
392 | } | |
393 | ||
d5daf49b DM |
394 | static int f_midi_snd_free(struct snd_device *device) |
395 | { | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static void f_midi_transmit_packet(struct usb_request *req, uint8_t p0, | |
400 | uint8_t p1, uint8_t p2, uint8_t p3) | |
401 | { | |
402 | unsigned length = req->length; | |
403 | u8 *buf = (u8 *)req->buf + length; | |
404 | ||
405 | buf[0] = p0; | |
406 | buf[1] = p1; | |
407 | buf[2] = p2; | |
408 | buf[3] = p3; | |
409 | req->length = length + 4; | |
410 | } | |
411 | ||
412 | /* | |
413 | * Converts MIDI commands to USB MIDI packets. | |
414 | */ | |
415 | static void f_midi_transmit_byte(struct usb_request *req, | |
416 | struct gmidi_in_port *port, uint8_t b) | |
417 | { | |
c8933c3f | 418 | uint8_t p0 = port->cable << 4; |
d5daf49b DM |
419 | |
420 | if (b >= 0xf8) { | |
421 | f_midi_transmit_packet(req, p0 | 0x0f, b, 0, 0); | |
422 | } else if (b >= 0xf0) { | |
423 | switch (b) { | |
424 | case 0xf0: | |
425 | port->data[0] = b; | |
426 | port->state = STATE_SYSEX_1; | |
427 | break; | |
428 | case 0xf1: | |
429 | case 0xf3: | |
430 | port->data[0] = b; | |
431 | port->state = STATE_1PARAM; | |
432 | break; | |
433 | case 0xf2: | |
434 | port->data[0] = b; | |
435 | port->state = STATE_2PARAM_1; | |
436 | break; | |
437 | case 0xf4: | |
438 | case 0xf5: | |
439 | port->state = STATE_UNKNOWN; | |
440 | break; | |
441 | case 0xf6: | |
442 | f_midi_transmit_packet(req, p0 | 0x05, 0xf6, 0, 0); | |
443 | port->state = STATE_UNKNOWN; | |
444 | break; | |
445 | case 0xf7: | |
446 | switch (port->state) { | |
447 | case STATE_SYSEX_0: | |
448 | f_midi_transmit_packet(req, | |
449 | p0 | 0x05, 0xf7, 0, 0); | |
450 | break; | |
451 | case STATE_SYSEX_1: | |
452 | f_midi_transmit_packet(req, | |
453 | p0 | 0x06, port->data[0], 0xf7, 0); | |
454 | break; | |
455 | case STATE_SYSEX_2: | |
456 | f_midi_transmit_packet(req, | |
457 | p0 | 0x07, port->data[0], | |
458 | port->data[1], 0xf7); | |
459 | break; | |
460 | } | |
461 | port->state = STATE_UNKNOWN; | |
462 | break; | |
463 | } | |
464 | } else if (b >= 0x80) { | |
465 | port->data[0] = b; | |
466 | if (b >= 0xc0 && b <= 0xdf) | |
467 | port->state = STATE_1PARAM; | |
468 | else | |
469 | port->state = STATE_2PARAM_1; | |
470 | } else { /* b < 0x80 */ | |
471 | switch (port->state) { | |
472 | case STATE_1PARAM: | |
473 | if (port->data[0] < 0xf0) { | |
474 | p0 |= port->data[0] >> 4; | |
475 | } else { | |
476 | p0 |= 0x02; | |
477 | port->state = STATE_UNKNOWN; | |
478 | } | |
479 | f_midi_transmit_packet(req, p0, port->data[0], b, 0); | |
480 | break; | |
481 | case STATE_2PARAM_1: | |
482 | port->data[1] = b; | |
483 | port->state = STATE_2PARAM_2; | |
484 | break; | |
485 | case STATE_2PARAM_2: | |
486 | if (port->data[0] < 0xf0) { | |
487 | p0 |= port->data[0] >> 4; | |
488 | port->state = STATE_2PARAM_1; | |
489 | } else { | |
490 | p0 |= 0x03; | |
491 | port->state = STATE_UNKNOWN; | |
492 | } | |
493 | f_midi_transmit_packet(req, | |
494 | p0, port->data[0], port->data[1], b); | |
495 | break; | |
496 | case STATE_SYSEX_0: | |
497 | port->data[0] = b; | |
498 | port->state = STATE_SYSEX_1; | |
499 | break; | |
500 | case STATE_SYSEX_1: | |
501 | port->data[1] = b; | |
502 | port->state = STATE_SYSEX_2; | |
503 | break; | |
504 | case STATE_SYSEX_2: | |
505 | f_midi_transmit_packet(req, | |
506 | p0 | 0x04, port->data[0], port->data[1], b); | |
507 | port->state = STATE_SYSEX_0; | |
508 | break; | |
509 | } | |
510 | } | |
511 | } | |
512 | ||
513 | static void f_midi_transmit(struct f_midi *midi, struct usb_request *req) | |
514 | { | |
515 | struct usb_ep *ep = midi->in_ep; | |
c8933c3f | 516 | int i; |
d5daf49b DM |
517 | |
518 | if (!ep) | |
519 | return; | |
520 | ||
521 | if (!req) | |
1efd54ea | 522 | req = midi_alloc_ep_req(ep, midi->buflen); |
d5daf49b DM |
523 | |
524 | if (!req) { | |
c9b3bde0 | 525 | ERROR(midi, "%s: alloc_ep_request failed\n", __func__); |
d5daf49b DM |
526 | return; |
527 | } | |
528 | req->length = 0; | |
529 | req->complete = f_midi_complete; | |
530 | ||
c8933c3f DM |
531 | for (i = 0; i < MAX_PORTS; i++) { |
532 | struct gmidi_in_port *port = midi->in_port[i]; | |
533 | struct snd_rawmidi_substream *substream = midi->in_substream[i]; | |
534 | ||
535 | if (!port || !port->active || !substream) | |
536 | continue; | |
537 | ||
d5daf49b DM |
538 | while (req->length + 3 < midi->buflen) { |
539 | uint8_t b; | |
c8933c3f | 540 | if (snd_rawmidi_transmit(substream, &b, 1) != 1) { |
d5daf49b DM |
541 | port->active = 0; |
542 | break; | |
543 | } | |
544 | f_midi_transmit_byte(req, port, b); | |
545 | } | |
546 | } | |
547 | ||
e9ca7e4b | 548 | if (req->length > 0 && ep->enabled) { |
f35fe4be FT |
549 | int err; |
550 | ||
551 | err = usb_ep_queue(ep, req, GFP_ATOMIC); | |
552 | if (err < 0) | |
553 | ERROR(midi, "%s queue req: %d\n", | |
554 | midi->in_ep->name, err); | |
555 | } else { | |
d5daf49b | 556 | free_ep_req(ep, req); |
f35fe4be | 557 | } |
d5daf49b DM |
558 | } |
559 | ||
560 | static void f_midi_in_tasklet(unsigned long data) | |
561 | { | |
562 | struct f_midi *midi = (struct f_midi *) data; | |
563 | f_midi_transmit(midi, NULL); | |
564 | } | |
565 | ||
566 | static int f_midi_in_open(struct snd_rawmidi_substream *substream) | |
567 | { | |
568 | struct f_midi *midi = substream->rmidi->private_data; | |
569 | ||
c8933c3f DM |
570 | if (!midi->in_port[substream->number]) |
571 | return -EINVAL; | |
572 | ||
d5daf49b | 573 | VDBG(midi, "%s()\n", __func__); |
c8933c3f DM |
574 | midi->in_substream[substream->number] = substream; |
575 | midi->in_port[substream->number]->state = STATE_UNKNOWN; | |
d5daf49b DM |
576 | return 0; |
577 | } | |
578 | ||
579 | static int f_midi_in_close(struct snd_rawmidi_substream *substream) | |
580 | { | |
581 | struct f_midi *midi = substream->rmidi->private_data; | |
582 | ||
583 | VDBG(midi, "%s()\n", __func__); | |
584 | return 0; | |
585 | } | |
586 | ||
587 | static void f_midi_in_trigger(struct snd_rawmidi_substream *substream, int up) | |
588 | { | |
589 | struct f_midi *midi = substream->rmidi->private_data; | |
590 | ||
c8933c3f DM |
591 | if (!midi->in_port[substream->number]) |
592 | return; | |
593 | ||
d5daf49b | 594 | VDBG(midi, "%s() %d\n", __func__, up); |
c8933c3f | 595 | midi->in_port[substream->number]->active = up; |
d5daf49b DM |
596 | if (up) |
597 | tasklet_hi_schedule(&midi->tasklet); | |
598 | } | |
599 | ||
600 | static int f_midi_out_open(struct snd_rawmidi_substream *substream) | |
601 | { | |
602 | struct f_midi *midi = substream->rmidi->private_data; | |
603 | ||
08895512 | 604 | if (substream->number >= MAX_PORTS) |
c8933c3f DM |
605 | return -EINVAL; |
606 | ||
d5daf49b | 607 | VDBG(midi, "%s()\n", __func__); |
c8933c3f | 608 | midi->out_substream[substream->number] = substream; |
d5daf49b DM |
609 | return 0; |
610 | } | |
611 | ||
612 | static int f_midi_out_close(struct snd_rawmidi_substream *substream) | |
613 | { | |
614 | struct f_midi *midi = substream->rmidi->private_data; | |
615 | ||
616 | VDBG(midi, "%s()\n", __func__); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | static void f_midi_out_trigger(struct snd_rawmidi_substream *substream, int up) | |
621 | { | |
622 | struct f_midi *midi = substream->rmidi->private_data; | |
623 | ||
624 | VDBG(midi, "%s()\n", __func__); | |
625 | ||
626 | if (up) | |
627 | set_bit(substream->number, &midi->out_triggered); | |
628 | else | |
629 | clear_bit(substream->number, &midi->out_triggered); | |
630 | } | |
631 | ||
632 | static struct snd_rawmidi_ops gmidi_in_ops = { | |
633 | .open = f_midi_in_open, | |
634 | .close = f_midi_in_close, | |
635 | .trigger = f_midi_in_trigger, | |
636 | }; | |
637 | ||
638 | static struct snd_rawmidi_ops gmidi_out_ops = { | |
639 | .open = f_midi_out_open, | |
640 | .close = f_midi_out_close, | |
641 | .trigger = f_midi_out_trigger | |
642 | }; | |
643 | ||
d23b4c3e AP |
644 | static inline void f_midi_unregister_card(struct f_midi *midi) |
645 | { | |
646 | if (midi->card) { | |
647 | snd_card_free(midi->card); | |
648 | midi->card = NULL; | |
649 | } | |
650 | } | |
651 | ||
d5daf49b DM |
652 | /* register as a sound "card" */ |
653 | static int f_midi_register_card(struct f_midi *midi) | |
654 | { | |
655 | struct snd_card *card; | |
656 | struct snd_rawmidi *rmidi; | |
657 | int err; | |
d5daf49b DM |
658 | static struct snd_device_ops ops = { |
659 | .dev_free = f_midi_snd_free, | |
660 | }; | |
661 | ||
13345095 TI |
662 | err = snd_card_new(&midi->gadget->dev, midi->index, midi->id, |
663 | THIS_MODULE, 0, &card); | |
d5daf49b | 664 | if (err < 0) { |
13345095 | 665 | ERROR(midi, "snd_card_new() failed\n"); |
d5daf49b DM |
666 | goto fail; |
667 | } | |
668 | midi->card = card; | |
669 | ||
670 | err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, midi, &ops); | |
671 | if (err < 0) { | |
672 | ERROR(midi, "snd_device_new() failed: error %d\n", err); | |
673 | goto fail; | |
674 | } | |
675 | ||
676 | strcpy(card->driver, f_midi_longname); | |
677 | strcpy(card->longname, f_midi_longname); | |
678 | strcpy(card->shortname, f_midi_shortname); | |
679 | ||
680 | /* Set up rawmidi */ | |
d5daf49b DM |
681 | snd_component_add(card, "MIDI"); |
682 | err = snd_rawmidi_new(card, card->longname, 0, | |
c8933c3f | 683 | midi->out_ports, midi->in_ports, &rmidi); |
d5daf49b DM |
684 | if (err < 0) { |
685 | ERROR(midi, "snd_rawmidi_new() failed: error %d\n", err); | |
686 | goto fail; | |
687 | } | |
688 | midi->rmidi = rmidi; | |
689 | strcpy(rmidi->name, card->shortname); | |
690 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | | |
691 | SNDRV_RAWMIDI_INFO_INPUT | | |
692 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
693 | rmidi->private_data = midi; | |
694 | ||
695 | /* | |
696 | * Yes, rawmidi OUTPUT = USB IN, and rawmidi INPUT = USB OUT. | |
697 | * It's an upside-down world being a gadget. | |
698 | */ | |
699 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &gmidi_in_ops); | |
700 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &gmidi_out_ops); | |
701 | ||
d5daf49b DM |
702 | /* register it - we're ready to go */ |
703 | err = snd_card_register(card); | |
704 | if (err < 0) { | |
705 | ERROR(midi, "snd_card_register() failed\n"); | |
706 | goto fail; | |
707 | } | |
708 | ||
709 | VDBG(midi, "%s() finished ok\n", __func__); | |
710 | return 0; | |
711 | ||
712 | fail: | |
d23b4c3e | 713 | f_midi_unregister_card(midi); |
d5daf49b DM |
714 | return err; |
715 | } | |
716 | ||
717 | /* MIDI function driver setup/binding */ | |
718 | ||
b85e9de9 | 719 | static int f_midi_bind(struct usb_configuration *c, struct usb_function *f) |
d5daf49b | 720 | { |
74203de0 | 721 | struct usb_descriptor_header **midi_function; |
c8933c3f | 722 | struct usb_midi_in_jack_descriptor jack_in_ext_desc[MAX_PORTS]; |
74203de0 | 723 | struct usb_midi_in_jack_descriptor jack_in_emb_desc[MAX_PORTS]; |
c8933c3f | 724 | struct usb_midi_out_jack_descriptor_1 jack_out_ext_desc[MAX_PORTS]; |
74203de0 | 725 | struct usb_midi_out_jack_descriptor_1 jack_out_emb_desc[MAX_PORTS]; |
d5daf49b DM |
726 | struct usb_composite_dev *cdev = c->cdev; |
727 | struct f_midi *midi = func_to_midi(f); | |
9caa0d77 | 728 | struct usb_string *us; |
c8933c3f | 729 | int status, n, jack = 1, i = 0; |
d5daf49b | 730 | |
b85e9de9 AP |
731 | midi->gadget = cdev->gadget; |
732 | tasklet_init(&midi->tasklet, f_midi_in_tasklet, (unsigned long) midi); | |
733 | status = f_midi_register_card(midi); | |
734 | if (status < 0) | |
735 | goto fail_register; | |
736 | ||
d5daf49b | 737 | /* maybe allocate device-global string ID */ |
9caa0d77 AP |
738 | us = usb_gstrings_attach(c->cdev, midi_strings, |
739 | ARRAY_SIZE(midi_string_defs)); | |
740 | if (IS_ERR(us)) { | |
741 | status = PTR_ERR(us); | |
742 | goto fail; | |
d5daf49b | 743 | } |
9caa0d77 | 744 | ac_interface_desc.iInterface = us[STRING_FUNC_IDX].id; |
d5daf49b DM |
745 | |
746 | /* We have two interfaces, AudioControl and MIDIStreaming */ | |
747 | status = usb_interface_id(c, f); | |
748 | if (status < 0) | |
749 | goto fail; | |
750 | ac_interface_desc.bInterfaceNumber = status; | |
751 | ||
752 | status = usb_interface_id(c, f); | |
753 | if (status < 0) | |
754 | goto fail; | |
755 | ms_interface_desc.bInterfaceNumber = status; | |
756 | ac_header_desc.baInterfaceNr[0] = status; | |
757 | ||
758 | status = -ENODEV; | |
759 | ||
760 | /* allocate instance-specific endpoints */ | |
761 | midi->in_ep = usb_ep_autoconfig(cdev->gadget, &bulk_in_desc); | |
762 | if (!midi->in_ep) | |
763 | goto fail; | |
d5daf49b DM |
764 | |
765 | midi->out_ep = usb_ep_autoconfig(cdev->gadget, &bulk_out_desc); | |
766 | if (!midi->out_ep) | |
767 | goto fail; | |
d5daf49b | 768 | |
74203de0 | 769 | /* allocate temporary function list */ |
2a5be878 | 770 | midi_function = kcalloc((MAX_PORTS * 4) + 9, sizeof(*midi_function), |
74203de0 DM |
771 | GFP_KERNEL); |
772 | if (!midi_function) { | |
773 | status = -ENOMEM; | |
774 | goto fail; | |
775 | } | |
776 | ||
c8933c3f DM |
777 | /* |
778 | * construct the function's descriptor set. As the number of | |
779 | * input and output MIDI ports is configurable, we have to do | |
780 | * it that way. | |
781 | */ | |
782 | ||
783 | /* add the headers - these are always the same */ | |
784 | midi_function[i++] = (struct usb_descriptor_header *) &ac_interface_desc; | |
785 | midi_function[i++] = (struct usb_descriptor_header *) &ac_header_desc; | |
786 | midi_function[i++] = (struct usb_descriptor_header *) &ms_interface_desc; | |
787 | ||
788 | /* calculate the header's wTotalLength */ | |
789 | n = USB_DT_MS_HEADER_SIZE | |
74203de0 DM |
790 | + (midi->in_ports + midi->out_ports) * |
791 | (USB_DT_MIDI_IN_SIZE + USB_DT_MIDI_OUT_SIZE(1)); | |
c8933c3f DM |
792 | ms_header_desc.wTotalLength = cpu_to_le16(n); |
793 | ||
794 | midi_function[i++] = (struct usb_descriptor_header *) &ms_header_desc; | |
795 | ||
74203de0 | 796 | /* configure the external IN jacks, each linked to an embedded OUT jack */ |
c8933c3f | 797 | for (n = 0; n < midi->in_ports; n++) { |
74203de0 DM |
798 | struct usb_midi_in_jack_descriptor *in_ext = &jack_in_ext_desc[n]; |
799 | struct usb_midi_out_jack_descriptor_1 *out_emb = &jack_out_emb_desc[n]; | |
800 | ||
801 | in_ext->bLength = USB_DT_MIDI_IN_SIZE; | |
802 | in_ext->bDescriptorType = USB_DT_CS_INTERFACE; | |
803 | in_ext->bDescriptorSubtype = USB_MS_MIDI_IN_JACK; | |
804 | in_ext->bJackType = USB_MS_EXTERNAL; | |
805 | in_ext->bJackID = jack++; | |
806 | in_ext->iJack = 0; | |
807 | midi_function[i++] = (struct usb_descriptor_header *) in_ext; | |
808 | ||
809 | out_emb->bLength = USB_DT_MIDI_OUT_SIZE(1); | |
810 | out_emb->bDescriptorType = USB_DT_CS_INTERFACE; | |
811 | out_emb->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK; | |
812 | out_emb->bJackType = USB_MS_EMBEDDED; | |
813 | out_emb->bJackID = jack++; | |
814 | out_emb->bNrInputPins = 1; | |
815 | out_emb->pins[0].baSourcePin = 1; | |
816 | out_emb->pins[0].baSourceID = in_ext->bJackID; | |
817 | out_emb->iJack = 0; | |
818 | midi_function[i++] = (struct usb_descriptor_header *) out_emb; | |
819 | ||
820 | /* link it to the endpoint */ | |
821 | ms_in_desc.baAssocJackID[n] = out_emb->bJackID; | |
c8933c3f DM |
822 | } |
823 | ||
74203de0 | 824 | /* configure the external OUT jacks, each linked to an embedded IN jack */ |
c8933c3f | 825 | for (n = 0; n < midi->out_ports; n++) { |
74203de0 DM |
826 | struct usb_midi_in_jack_descriptor *in_emb = &jack_in_emb_desc[n]; |
827 | struct usb_midi_out_jack_descriptor_1 *out_ext = &jack_out_ext_desc[n]; | |
828 | ||
829 | in_emb->bLength = USB_DT_MIDI_IN_SIZE; | |
830 | in_emb->bDescriptorType = USB_DT_CS_INTERFACE; | |
831 | in_emb->bDescriptorSubtype = USB_MS_MIDI_IN_JACK; | |
832 | in_emb->bJackType = USB_MS_EMBEDDED; | |
833 | in_emb->bJackID = jack++; | |
834 | in_emb->iJack = 0; | |
835 | midi_function[i++] = (struct usb_descriptor_header *) in_emb; | |
836 | ||
837 | out_ext->bLength = USB_DT_MIDI_OUT_SIZE(1); | |
838 | out_ext->bDescriptorType = USB_DT_CS_INTERFACE; | |
839 | out_ext->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK; | |
840 | out_ext->bJackType = USB_MS_EXTERNAL; | |
841 | out_ext->bJackID = jack++; | |
842 | out_ext->bNrInputPins = 1; | |
843 | out_ext->iJack = 0; | |
844 | out_ext->pins[0].baSourceID = in_emb->bJackID; | |
845 | out_ext->pins[0].baSourcePin = 1; | |
846 | midi_function[i++] = (struct usb_descriptor_header *) out_ext; | |
847 | ||
848 | /* link it to the endpoint */ | |
849 | ms_out_desc.baAssocJackID[n] = in_emb->bJackID; | |
c8933c3f DM |
850 | } |
851 | ||
852 | /* configure the endpoint descriptors ... */ | |
853 | ms_out_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->in_ports); | |
854 | ms_out_desc.bNumEmbMIDIJack = midi->in_ports; | |
c8933c3f DM |
855 | |
856 | ms_in_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->out_ports); | |
857 | ms_in_desc.bNumEmbMIDIJack = midi->out_ports; | |
c8933c3f DM |
858 | |
859 | /* ... and add them to the list */ | |
860 | midi_function[i++] = (struct usb_descriptor_header *) &bulk_out_desc; | |
861 | midi_function[i++] = (struct usb_descriptor_header *) &ms_out_desc; | |
862 | midi_function[i++] = (struct usb_descriptor_header *) &bulk_in_desc; | |
863 | midi_function[i++] = (struct usb_descriptor_header *) &ms_in_desc; | |
864 | midi_function[i++] = NULL; | |
865 | ||
d5daf49b DM |
866 | /* |
867 | * support all relevant hardware speeds... we expect that when | |
868 | * hardware is dual speed, all bulk-capable endpoints work at | |
869 | * both speeds | |
870 | */ | |
871 | /* copy descriptors, and track endpoint copies */ | |
10287bae SAS |
872 | f->fs_descriptors = usb_copy_descriptors(midi_function); |
873 | if (!f->fs_descriptors) | |
7f2a9268 | 874 | goto fail_f_midi; |
10287bae | 875 | |
d5daf49b | 876 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
d5daf49b DM |
877 | bulk_in_desc.wMaxPacketSize = cpu_to_le16(512); |
878 | bulk_out_desc.wMaxPacketSize = cpu_to_le16(512); | |
879 | f->hs_descriptors = usb_copy_descriptors(midi_function); | |
7f2a9268 SAS |
880 | if (!f->hs_descriptors) |
881 | goto fail_f_midi; | |
d5daf49b DM |
882 | } |
883 | ||
74203de0 DM |
884 | kfree(midi_function); |
885 | ||
d5daf49b DM |
886 | return 0; |
887 | ||
7f2a9268 SAS |
888 | fail_f_midi: |
889 | kfree(midi_function); | |
890 | usb_free_descriptors(f->hs_descriptors); | |
d5daf49b | 891 | fail: |
b85e9de9 AP |
892 | f_midi_unregister_card(midi); |
893 | fail_register: | |
d5daf49b DM |
894 | ERROR(cdev, "%s: can't bind, err %d\n", f->name, status); |
895 | ||
896 | return status; | |
897 | } | |
898 | ||
6f1de344 AP |
899 | static inline struct f_midi_opts *to_f_midi_opts(struct config_item *item) |
900 | { | |
901 | return container_of(to_config_group(item), struct f_midi_opts, | |
902 | func_inst.group); | |
903 | } | |
904 | ||
6f1de344 AP |
905 | static void midi_attr_release(struct config_item *item) |
906 | { | |
907 | struct f_midi_opts *opts = to_f_midi_opts(item); | |
908 | ||
909 | usb_put_function_instance(&opts->func_inst); | |
910 | } | |
911 | ||
912 | static struct configfs_item_operations midi_item_ops = { | |
913 | .release = midi_attr_release, | |
6f1de344 AP |
914 | }; |
915 | ||
916 | #define F_MIDI_OPT(name, test_limit, limit) \ | |
3755a273 | 917 | static ssize_t f_midi_opts_##name##_show(struct config_item *item, char *page) \ |
6f1de344 | 918 | { \ |
3755a273 | 919 | struct f_midi_opts *opts = to_f_midi_opts(item); \ |
6f1de344 AP |
920 | int result; \ |
921 | \ | |
922 | mutex_lock(&opts->lock); \ | |
923 | result = sprintf(page, "%d\n", opts->name); \ | |
924 | mutex_unlock(&opts->lock); \ | |
925 | \ | |
926 | return result; \ | |
927 | } \ | |
928 | \ | |
3755a273 | 929 | static ssize_t f_midi_opts_##name##_store(struct config_item *item, \ |
6f1de344 AP |
930 | const char *page, size_t len) \ |
931 | { \ | |
3755a273 | 932 | struct f_midi_opts *opts = to_f_midi_opts(item); \ |
6f1de344 AP |
933 | int ret; \ |
934 | u32 num; \ | |
935 | \ | |
936 | mutex_lock(&opts->lock); \ | |
937 | if (opts->refcnt) { \ | |
938 | ret = -EBUSY; \ | |
939 | goto end; \ | |
940 | } \ | |
941 | \ | |
942 | ret = kstrtou32(page, 0, &num); \ | |
943 | if (ret) \ | |
944 | goto end; \ | |
945 | \ | |
946 | if (test_limit && num > limit) { \ | |
947 | ret = -EINVAL; \ | |
948 | goto end; \ | |
949 | } \ | |
950 | opts->name = num; \ | |
951 | ret = len; \ | |
952 | \ | |
953 | end: \ | |
954 | mutex_unlock(&opts->lock); \ | |
955 | return ret; \ | |
956 | } \ | |
957 | \ | |
3755a273 | 958 | CONFIGFS_ATTR(f_midi_opts_, name); |
6f1de344 AP |
959 | |
960 | F_MIDI_OPT(index, true, SNDRV_CARDS); | |
961 | F_MIDI_OPT(buflen, false, 0); | |
962 | F_MIDI_OPT(qlen, false, 0); | |
963 | F_MIDI_OPT(in_ports, true, MAX_PORTS); | |
964 | F_MIDI_OPT(out_ports, true, MAX_PORTS); | |
965 | ||
3755a273 | 966 | static ssize_t f_midi_opts_id_show(struct config_item *item, char *page) |
6f1de344 | 967 | { |
3755a273 | 968 | struct f_midi_opts *opts = to_f_midi_opts(item); |
6f1de344 AP |
969 | int result; |
970 | ||
971 | mutex_lock(&opts->lock); | |
a25a23cc PS |
972 | if (opts->id) { |
973 | result = strlcpy(page, opts->id, PAGE_SIZE); | |
974 | } else { | |
975 | page[0] = 0; | |
976 | result = 0; | |
977 | } | |
978 | ||
6f1de344 AP |
979 | mutex_unlock(&opts->lock); |
980 | ||
981 | return result; | |
982 | } | |
983 | ||
3755a273 | 984 | static ssize_t f_midi_opts_id_store(struct config_item *item, |
6f1de344 AP |
985 | const char *page, size_t len) |
986 | { | |
3755a273 | 987 | struct f_midi_opts *opts = to_f_midi_opts(item); |
6f1de344 AP |
988 | int ret; |
989 | char *c; | |
990 | ||
991 | mutex_lock(&opts->lock); | |
992 | if (opts->refcnt) { | |
993 | ret = -EBUSY; | |
994 | goto end; | |
995 | } | |
996 | ||
997 | c = kstrndup(page, len, GFP_KERNEL); | |
998 | if (!c) { | |
999 | ret = -ENOMEM; | |
1000 | goto end; | |
1001 | } | |
1002 | if (opts->id_allocated) | |
1003 | kfree(opts->id); | |
1004 | opts->id = c; | |
1005 | opts->id_allocated = true; | |
1006 | ret = len; | |
1007 | end: | |
1008 | mutex_unlock(&opts->lock); | |
1009 | return ret; | |
1010 | } | |
1011 | ||
3755a273 | 1012 | CONFIGFS_ATTR(f_midi_opts_, id); |
6f1de344 AP |
1013 | |
1014 | static struct configfs_attribute *midi_attrs[] = { | |
3755a273 CH |
1015 | &f_midi_opts_attr_index, |
1016 | &f_midi_opts_attr_buflen, | |
1017 | &f_midi_opts_attr_qlen, | |
1018 | &f_midi_opts_attr_in_ports, | |
1019 | &f_midi_opts_attr_out_ports, | |
1020 | &f_midi_opts_attr_id, | |
6f1de344 AP |
1021 | NULL, |
1022 | }; | |
1023 | ||
1024 | static struct config_item_type midi_func_type = { | |
1025 | .ct_item_ops = &midi_item_ops, | |
1026 | .ct_attrs = midi_attrs, | |
1027 | .ct_owner = THIS_MODULE, | |
1028 | }; | |
1029 | ||
b85e9de9 AP |
1030 | static void f_midi_free_inst(struct usb_function_instance *f) |
1031 | { | |
1032 | struct f_midi_opts *opts; | |
1033 | ||
1034 | opts = container_of(f, struct f_midi_opts, func_inst); | |
1035 | ||
6f1de344 AP |
1036 | if (opts->id_allocated) |
1037 | kfree(opts->id); | |
1038 | ||
b85e9de9 AP |
1039 | kfree(opts); |
1040 | } | |
1041 | ||
1042 | static struct usb_function_instance *f_midi_alloc_inst(void) | |
1043 | { | |
1044 | struct f_midi_opts *opts; | |
1045 | ||
1046 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
1047 | if (!opts) | |
1048 | return ERR_PTR(-ENOMEM); | |
6f1de344 AP |
1049 | |
1050 | mutex_init(&opts->lock); | |
b85e9de9 | 1051 | opts->func_inst.free_func_inst = f_midi_free_inst; |
6f1de344 AP |
1052 | opts->index = SNDRV_DEFAULT_IDX1; |
1053 | opts->id = SNDRV_DEFAULT_STR1; | |
1054 | opts->buflen = 256; | |
1055 | opts->qlen = 32; | |
1056 | opts->in_ports = 1; | |
1057 | opts->out_ports = 1; | |
1058 | ||
1059 | config_group_init_type_name(&opts->func_inst.group, "", | |
1060 | &midi_func_type); | |
b85e9de9 AP |
1061 | |
1062 | return &opts->func_inst; | |
1063 | } | |
1064 | ||
1065 | static void f_midi_free(struct usb_function *f) | |
1066 | { | |
1067 | struct f_midi *midi; | |
1068 | struct f_midi_opts *opts; | |
1069 | int i; | |
1070 | ||
1071 | midi = func_to_midi(f); | |
1072 | opts = container_of(f->fi, struct f_midi_opts, func_inst); | |
1073 | kfree(midi->id); | |
6f1de344 | 1074 | mutex_lock(&opts->lock); |
b85e9de9 AP |
1075 | for (i = opts->in_ports - 1; i >= 0; --i) |
1076 | kfree(midi->in_port[i]); | |
1077 | kfree(midi); | |
6f1de344 AP |
1078 | --opts->refcnt; |
1079 | mutex_unlock(&opts->lock); | |
b85e9de9 AP |
1080 | } |
1081 | ||
1082 | static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f) | |
1083 | { | |
1084 | struct usb_composite_dev *cdev = f->config->cdev; | |
1085 | struct f_midi *midi = func_to_midi(f); | |
1086 | struct snd_card *card; | |
1087 | ||
1088 | DBG(cdev, "unbind\n"); | |
1089 | ||
1090 | /* just to be sure */ | |
1091 | f_midi_disable(f); | |
1092 | ||
1093 | card = midi->card; | |
1094 | midi->card = NULL; | |
1095 | if (card) | |
1096 | snd_card_free(card); | |
1097 | ||
1098 | usb_free_all_descriptors(f); | |
1099 | } | |
1100 | ||
f509fee8 | 1101 | static struct usb_function *f_midi_alloc(struct usb_function_instance *fi) |
b85e9de9 AP |
1102 | { |
1103 | struct f_midi *midi; | |
1104 | struct f_midi_opts *opts; | |
1105 | int status, i; | |
1106 | ||
1107 | opts = container_of(fi, struct f_midi_opts, func_inst); | |
6f1de344 AP |
1108 | |
1109 | mutex_lock(&opts->lock); | |
b85e9de9 | 1110 | /* sanity check */ |
6f1de344 AP |
1111 | if (opts->in_ports > MAX_PORTS || opts->out_ports > MAX_PORTS) { |
1112 | mutex_unlock(&opts->lock); | |
b85e9de9 | 1113 | return ERR_PTR(-EINVAL); |
6f1de344 | 1114 | } |
b85e9de9 AP |
1115 | |
1116 | /* allocate and initialize one new instance */ | |
1117 | midi = kzalloc(sizeof(*midi), GFP_KERNEL); | |
6f1de344 AP |
1118 | if (!midi) { |
1119 | mutex_unlock(&opts->lock); | |
b85e9de9 | 1120 | return ERR_PTR(-ENOMEM); |
6f1de344 | 1121 | } |
b85e9de9 AP |
1122 | |
1123 | for (i = 0; i < opts->in_ports; i++) { | |
1124 | struct gmidi_in_port *port = kzalloc(sizeof(*port), GFP_KERNEL); | |
1125 | ||
1126 | if (!port) { | |
1127 | status = -ENOMEM; | |
6f1de344 | 1128 | mutex_unlock(&opts->lock); |
b85e9de9 AP |
1129 | goto setup_fail; |
1130 | } | |
1131 | ||
1132 | port->midi = midi; | |
1133 | port->active = 0; | |
1134 | port->cable = i; | |
1135 | midi->in_port[i] = port; | |
1136 | } | |
1137 | ||
1138 | /* set up ALSA midi devices */ | |
1139 | midi->id = kstrdup(opts->id, GFP_KERNEL); | |
1140 | if (opts->id && !midi->id) { | |
1141 | status = -ENOMEM; | |
6f1de344 | 1142 | mutex_unlock(&opts->lock); |
b2e2c94b | 1143 | goto setup_fail; |
b85e9de9 AP |
1144 | } |
1145 | midi->in_ports = opts->in_ports; | |
1146 | midi->out_ports = opts->out_ports; | |
1147 | midi->index = opts->index; | |
1148 | midi->buflen = opts->buflen; | |
1149 | midi->qlen = opts->qlen; | |
6f1de344 AP |
1150 | ++opts->refcnt; |
1151 | mutex_unlock(&opts->lock); | |
b85e9de9 AP |
1152 | |
1153 | midi->func.name = "gmidi function"; | |
b85e9de9 AP |
1154 | midi->func.bind = f_midi_bind; |
1155 | midi->func.unbind = f_midi_unbind; | |
1156 | midi->func.set_alt = f_midi_set_alt; | |
1157 | midi->func.disable = f_midi_disable; | |
1158 | midi->func.free_func = f_midi_free; | |
1159 | ||
1160 | return &midi->func; | |
1161 | ||
b85e9de9 AP |
1162 | setup_fail: |
1163 | for (--i; i >= 0; i--) | |
1164 | kfree(midi->in_port[i]); | |
1165 | kfree(midi); | |
1166 | return ERR_PTR(status); | |
1167 | } | |
1168 | ||
1169 | DECLARE_USB_FUNCTION_INIT(midi, f_midi_alloc_inst, f_midi_alloc); |