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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 | ||
305 | if (ep->driver_data) | |
306 | usb_ep_disable(ep); | |
307 | ||
308 | err = config_ep_by_speed(midi->gadget, f, ep); | |
309 | if (err) { | |
310 | ERROR(cdev, "can't configure %s: %d\n", ep->name, err); | |
311 | return err; | |
312 | } | |
313 | ||
314 | err = usb_ep_enable(ep); | |
315 | if (err) { | |
316 | ERROR(cdev, "can't start %s: %d\n", ep->name, err); | |
317 | return err; | |
318 | } | |
319 | ||
320 | ep->driver_data = midi; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
326 | { | |
327 | struct f_midi *midi = func_to_midi(f); | |
328 | struct usb_composite_dev *cdev = f->config->cdev; | |
329 | unsigned i; | |
330 | int err; | |
331 | ||
332 | err = f_midi_start_ep(midi, f, midi->in_ep); | |
333 | if (err) | |
334 | return err; | |
335 | ||
336 | err = f_midi_start_ep(midi, f, midi->out_ep); | |
337 | if (err) | |
338 | return err; | |
339 | ||
340 | if (midi->out_ep->driver_data) | |
341 | usb_ep_disable(midi->out_ep); | |
342 | ||
343 | err = config_ep_by_speed(midi->gadget, f, midi->out_ep); | |
344 | if (err) { | |
345 | ERROR(cdev, "can't configure %s: %d\n", | |
346 | midi->out_ep->name, err); | |
347 | return err; | |
348 | } | |
349 | ||
350 | err = usb_ep_enable(midi->out_ep); | |
351 | if (err) { | |
352 | ERROR(cdev, "can't start %s: %d\n", | |
353 | midi->out_ep->name, err); | |
354 | return err; | |
355 | } | |
356 | ||
357 | midi->out_ep->driver_data = midi; | |
358 | ||
359 | /* allocate a bunch of read buffers and queue them all at once. */ | |
360 | for (i = 0; i < midi->qlen && err == 0; i++) { | |
361 | struct usb_request *req = | |
1efd54ea | 362 | midi_alloc_ep_req(midi->out_ep, midi->buflen); |
d5daf49b DM |
363 | if (req == NULL) |
364 | return -ENOMEM; | |
365 | ||
366 | req->complete = f_midi_complete; | |
367 | err = usb_ep_queue(midi->out_ep, req, GFP_ATOMIC); | |
368 | if (err) { | |
369 | ERROR(midi, "%s queue req: %d\n", | |
370 | midi->out_ep->name, err); | |
371 | } | |
372 | } | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | static void f_midi_disable(struct usb_function *f) | |
378 | { | |
379 | struct f_midi *midi = func_to_midi(f); | |
380 | struct usb_composite_dev *cdev = f->config->cdev; | |
381 | ||
382 | DBG(cdev, "disable\n"); | |
383 | ||
384 | /* | |
385 | * just disable endpoints, forcing completion of pending i/o. | |
386 | * all our completion handlers free their requests in this case. | |
387 | */ | |
388 | usb_ep_disable(midi->in_ep); | |
389 | usb_ep_disable(midi->out_ep); | |
390 | } | |
391 | ||
d5daf49b DM |
392 | static int f_midi_snd_free(struct snd_device *device) |
393 | { | |
394 | return 0; | |
395 | } | |
396 | ||
397 | static void f_midi_transmit_packet(struct usb_request *req, uint8_t p0, | |
398 | uint8_t p1, uint8_t p2, uint8_t p3) | |
399 | { | |
400 | unsigned length = req->length; | |
401 | u8 *buf = (u8 *)req->buf + length; | |
402 | ||
403 | buf[0] = p0; | |
404 | buf[1] = p1; | |
405 | buf[2] = p2; | |
406 | buf[3] = p3; | |
407 | req->length = length + 4; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Converts MIDI commands to USB MIDI packets. | |
412 | */ | |
413 | static void f_midi_transmit_byte(struct usb_request *req, | |
414 | struct gmidi_in_port *port, uint8_t b) | |
415 | { | |
c8933c3f | 416 | uint8_t p0 = port->cable << 4; |
d5daf49b DM |
417 | |
418 | if (b >= 0xf8) { | |
419 | f_midi_transmit_packet(req, p0 | 0x0f, b, 0, 0); | |
420 | } else if (b >= 0xf0) { | |
421 | switch (b) { | |
422 | case 0xf0: | |
423 | port->data[0] = b; | |
424 | port->state = STATE_SYSEX_1; | |
425 | break; | |
426 | case 0xf1: | |
427 | case 0xf3: | |
428 | port->data[0] = b; | |
429 | port->state = STATE_1PARAM; | |
430 | break; | |
431 | case 0xf2: | |
432 | port->data[0] = b; | |
433 | port->state = STATE_2PARAM_1; | |
434 | break; | |
435 | case 0xf4: | |
436 | case 0xf5: | |
437 | port->state = STATE_UNKNOWN; | |
438 | break; | |
439 | case 0xf6: | |
440 | f_midi_transmit_packet(req, p0 | 0x05, 0xf6, 0, 0); | |
441 | port->state = STATE_UNKNOWN; | |
442 | break; | |
443 | case 0xf7: | |
444 | switch (port->state) { | |
445 | case STATE_SYSEX_0: | |
446 | f_midi_transmit_packet(req, | |
447 | p0 | 0x05, 0xf7, 0, 0); | |
448 | break; | |
449 | case STATE_SYSEX_1: | |
450 | f_midi_transmit_packet(req, | |
451 | p0 | 0x06, port->data[0], 0xf7, 0); | |
452 | break; | |
453 | case STATE_SYSEX_2: | |
454 | f_midi_transmit_packet(req, | |
455 | p0 | 0x07, port->data[0], | |
456 | port->data[1], 0xf7); | |
457 | break; | |
458 | } | |
459 | port->state = STATE_UNKNOWN; | |
460 | break; | |
461 | } | |
462 | } else if (b >= 0x80) { | |
463 | port->data[0] = b; | |
464 | if (b >= 0xc0 && b <= 0xdf) | |
465 | port->state = STATE_1PARAM; | |
466 | else | |
467 | port->state = STATE_2PARAM_1; | |
468 | } else { /* b < 0x80 */ | |
469 | switch (port->state) { | |
470 | case STATE_1PARAM: | |
471 | if (port->data[0] < 0xf0) { | |
472 | p0 |= port->data[0] >> 4; | |
473 | } else { | |
474 | p0 |= 0x02; | |
475 | port->state = STATE_UNKNOWN; | |
476 | } | |
477 | f_midi_transmit_packet(req, p0, port->data[0], b, 0); | |
478 | break; | |
479 | case STATE_2PARAM_1: | |
480 | port->data[1] = b; | |
481 | port->state = STATE_2PARAM_2; | |
482 | break; | |
483 | case STATE_2PARAM_2: | |
484 | if (port->data[0] < 0xf0) { | |
485 | p0 |= port->data[0] >> 4; | |
486 | port->state = STATE_2PARAM_1; | |
487 | } else { | |
488 | p0 |= 0x03; | |
489 | port->state = STATE_UNKNOWN; | |
490 | } | |
491 | f_midi_transmit_packet(req, | |
492 | p0, port->data[0], port->data[1], b); | |
493 | break; | |
494 | case STATE_SYSEX_0: | |
495 | port->data[0] = b; | |
496 | port->state = STATE_SYSEX_1; | |
497 | break; | |
498 | case STATE_SYSEX_1: | |
499 | port->data[1] = b; | |
500 | port->state = STATE_SYSEX_2; | |
501 | break; | |
502 | case STATE_SYSEX_2: | |
503 | f_midi_transmit_packet(req, | |
504 | p0 | 0x04, port->data[0], port->data[1], b); | |
505 | port->state = STATE_SYSEX_0; | |
506 | break; | |
507 | } | |
508 | } | |
509 | } | |
510 | ||
511 | static void f_midi_transmit(struct f_midi *midi, struct usb_request *req) | |
512 | { | |
513 | struct usb_ep *ep = midi->in_ep; | |
c8933c3f | 514 | int i; |
d5daf49b DM |
515 | |
516 | if (!ep) | |
517 | return; | |
518 | ||
519 | if (!req) | |
1efd54ea | 520 | req = midi_alloc_ep_req(ep, midi->buflen); |
d5daf49b DM |
521 | |
522 | if (!req) { | |
523 | ERROR(midi, "gmidi_transmit: alloc_ep_request failed\n"); | |
524 | return; | |
525 | } | |
526 | req->length = 0; | |
527 | req->complete = f_midi_complete; | |
528 | ||
c8933c3f DM |
529 | for (i = 0; i < MAX_PORTS; i++) { |
530 | struct gmidi_in_port *port = midi->in_port[i]; | |
531 | struct snd_rawmidi_substream *substream = midi->in_substream[i]; | |
532 | ||
533 | if (!port || !port->active || !substream) | |
534 | continue; | |
535 | ||
d5daf49b DM |
536 | while (req->length + 3 < midi->buflen) { |
537 | uint8_t b; | |
c8933c3f | 538 | if (snd_rawmidi_transmit(substream, &b, 1) != 1) { |
d5daf49b DM |
539 | port->active = 0; |
540 | break; | |
541 | } | |
542 | f_midi_transmit_byte(req, port, b); | |
543 | } | |
544 | } | |
545 | ||
546 | if (req->length > 0) | |
547 | usb_ep_queue(ep, req, GFP_ATOMIC); | |
548 | else | |
549 | free_ep_req(ep, req); | |
550 | } | |
551 | ||
552 | static void f_midi_in_tasklet(unsigned long data) | |
553 | { | |
554 | struct f_midi *midi = (struct f_midi *) data; | |
555 | f_midi_transmit(midi, NULL); | |
556 | } | |
557 | ||
558 | static int f_midi_in_open(struct snd_rawmidi_substream *substream) | |
559 | { | |
560 | struct f_midi *midi = substream->rmidi->private_data; | |
561 | ||
c8933c3f DM |
562 | if (!midi->in_port[substream->number]) |
563 | return -EINVAL; | |
564 | ||
d5daf49b | 565 | VDBG(midi, "%s()\n", __func__); |
c8933c3f DM |
566 | midi->in_substream[substream->number] = substream; |
567 | midi->in_port[substream->number]->state = STATE_UNKNOWN; | |
d5daf49b DM |
568 | return 0; |
569 | } | |
570 | ||
571 | static int f_midi_in_close(struct snd_rawmidi_substream *substream) | |
572 | { | |
573 | struct f_midi *midi = substream->rmidi->private_data; | |
574 | ||
575 | VDBG(midi, "%s()\n", __func__); | |
576 | return 0; | |
577 | } | |
578 | ||
579 | static void f_midi_in_trigger(struct snd_rawmidi_substream *substream, int up) | |
580 | { | |
581 | struct f_midi *midi = substream->rmidi->private_data; | |
582 | ||
c8933c3f DM |
583 | if (!midi->in_port[substream->number]) |
584 | return; | |
585 | ||
d5daf49b | 586 | VDBG(midi, "%s() %d\n", __func__, up); |
c8933c3f | 587 | midi->in_port[substream->number]->active = up; |
d5daf49b DM |
588 | if (up) |
589 | tasklet_hi_schedule(&midi->tasklet); | |
590 | } | |
591 | ||
592 | static int f_midi_out_open(struct snd_rawmidi_substream *substream) | |
593 | { | |
594 | struct f_midi *midi = substream->rmidi->private_data; | |
595 | ||
08895512 | 596 | if (substream->number >= MAX_PORTS) |
c8933c3f DM |
597 | return -EINVAL; |
598 | ||
d5daf49b | 599 | VDBG(midi, "%s()\n", __func__); |
c8933c3f | 600 | midi->out_substream[substream->number] = substream; |
d5daf49b DM |
601 | return 0; |
602 | } | |
603 | ||
604 | static int f_midi_out_close(struct snd_rawmidi_substream *substream) | |
605 | { | |
606 | struct f_midi *midi = substream->rmidi->private_data; | |
607 | ||
608 | VDBG(midi, "%s()\n", __func__); | |
609 | return 0; | |
610 | } | |
611 | ||
612 | static void f_midi_out_trigger(struct snd_rawmidi_substream *substream, int up) | |
613 | { | |
614 | struct f_midi *midi = substream->rmidi->private_data; | |
615 | ||
616 | VDBG(midi, "%s()\n", __func__); | |
617 | ||
618 | if (up) | |
619 | set_bit(substream->number, &midi->out_triggered); | |
620 | else | |
621 | clear_bit(substream->number, &midi->out_triggered); | |
622 | } | |
623 | ||
624 | static struct snd_rawmidi_ops gmidi_in_ops = { | |
625 | .open = f_midi_in_open, | |
626 | .close = f_midi_in_close, | |
627 | .trigger = f_midi_in_trigger, | |
628 | }; | |
629 | ||
630 | static struct snd_rawmidi_ops gmidi_out_ops = { | |
631 | .open = f_midi_out_open, | |
632 | .close = f_midi_out_close, | |
633 | .trigger = f_midi_out_trigger | |
634 | }; | |
635 | ||
d23b4c3e AP |
636 | static inline void f_midi_unregister_card(struct f_midi *midi) |
637 | { | |
638 | if (midi->card) { | |
639 | snd_card_free(midi->card); | |
640 | midi->card = NULL; | |
641 | } | |
642 | } | |
643 | ||
d5daf49b DM |
644 | /* register as a sound "card" */ |
645 | static int f_midi_register_card(struct f_midi *midi) | |
646 | { | |
647 | struct snd_card *card; | |
648 | struct snd_rawmidi *rmidi; | |
649 | int err; | |
d5daf49b DM |
650 | static struct snd_device_ops ops = { |
651 | .dev_free = f_midi_snd_free, | |
652 | }; | |
653 | ||
13345095 TI |
654 | err = snd_card_new(&midi->gadget->dev, midi->index, midi->id, |
655 | THIS_MODULE, 0, &card); | |
d5daf49b | 656 | if (err < 0) { |
13345095 | 657 | ERROR(midi, "snd_card_new() failed\n"); |
d5daf49b DM |
658 | goto fail; |
659 | } | |
660 | midi->card = card; | |
661 | ||
662 | err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, midi, &ops); | |
663 | if (err < 0) { | |
664 | ERROR(midi, "snd_device_new() failed: error %d\n", err); | |
665 | goto fail; | |
666 | } | |
667 | ||
668 | strcpy(card->driver, f_midi_longname); | |
669 | strcpy(card->longname, f_midi_longname); | |
670 | strcpy(card->shortname, f_midi_shortname); | |
671 | ||
672 | /* Set up rawmidi */ | |
d5daf49b DM |
673 | snd_component_add(card, "MIDI"); |
674 | err = snd_rawmidi_new(card, card->longname, 0, | |
c8933c3f | 675 | midi->out_ports, midi->in_ports, &rmidi); |
d5daf49b DM |
676 | if (err < 0) { |
677 | ERROR(midi, "snd_rawmidi_new() failed: error %d\n", err); | |
678 | goto fail; | |
679 | } | |
680 | midi->rmidi = rmidi; | |
681 | strcpy(rmidi->name, card->shortname); | |
682 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | | |
683 | SNDRV_RAWMIDI_INFO_INPUT | | |
684 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
685 | rmidi->private_data = midi; | |
686 | ||
687 | /* | |
688 | * Yes, rawmidi OUTPUT = USB IN, and rawmidi INPUT = USB OUT. | |
689 | * It's an upside-down world being a gadget. | |
690 | */ | |
691 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &gmidi_in_ops); | |
692 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &gmidi_out_ops); | |
693 | ||
d5daf49b DM |
694 | /* register it - we're ready to go */ |
695 | err = snd_card_register(card); | |
696 | if (err < 0) { | |
697 | ERROR(midi, "snd_card_register() failed\n"); | |
698 | goto fail; | |
699 | } | |
700 | ||
701 | VDBG(midi, "%s() finished ok\n", __func__); | |
702 | return 0; | |
703 | ||
704 | fail: | |
d23b4c3e | 705 | f_midi_unregister_card(midi); |
d5daf49b DM |
706 | return err; |
707 | } | |
708 | ||
709 | /* MIDI function driver setup/binding */ | |
710 | ||
b85e9de9 | 711 | static int f_midi_bind(struct usb_configuration *c, struct usb_function *f) |
d5daf49b | 712 | { |
74203de0 | 713 | struct usb_descriptor_header **midi_function; |
c8933c3f | 714 | struct usb_midi_in_jack_descriptor jack_in_ext_desc[MAX_PORTS]; |
74203de0 | 715 | struct usb_midi_in_jack_descriptor jack_in_emb_desc[MAX_PORTS]; |
c8933c3f | 716 | struct usb_midi_out_jack_descriptor_1 jack_out_ext_desc[MAX_PORTS]; |
74203de0 | 717 | struct usb_midi_out_jack_descriptor_1 jack_out_emb_desc[MAX_PORTS]; |
d5daf49b DM |
718 | struct usb_composite_dev *cdev = c->cdev; |
719 | struct f_midi *midi = func_to_midi(f); | |
9caa0d77 | 720 | struct usb_string *us; |
c8933c3f | 721 | int status, n, jack = 1, i = 0; |
d5daf49b | 722 | |
b85e9de9 AP |
723 | midi->gadget = cdev->gadget; |
724 | tasklet_init(&midi->tasklet, f_midi_in_tasklet, (unsigned long) midi); | |
725 | status = f_midi_register_card(midi); | |
726 | if (status < 0) | |
727 | goto fail_register; | |
728 | ||
d5daf49b | 729 | /* maybe allocate device-global string ID */ |
9caa0d77 AP |
730 | us = usb_gstrings_attach(c->cdev, midi_strings, |
731 | ARRAY_SIZE(midi_string_defs)); | |
732 | if (IS_ERR(us)) { | |
733 | status = PTR_ERR(us); | |
734 | goto fail; | |
d5daf49b | 735 | } |
9caa0d77 | 736 | ac_interface_desc.iInterface = us[STRING_FUNC_IDX].id; |
d5daf49b DM |
737 | |
738 | /* We have two interfaces, AudioControl and MIDIStreaming */ | |
739 | status = usb_interface_id(c, f); | |
740 | if (status < 0) | |
741 | goto fail; | |
742 | ac_interface_desc.bInterfaceNumber = status; | |
743 | ||
744 | status = usb_interface_id(c, f); | |
745 | if (status < 0) | |
746 | goto fail; | |
747 | ms_interface_desc.bInterfaceNumber = status; | |
748 | ac_header_desc.baInterfaceNr[0] = status; | |
749 | ||
750 | status = -ENODEV; | |
751 | ||
752 | /* allocate instance-specific endpoints */ | |
753 | midi->in_ep = usb_ep_autoconfig(cdev->gadget, &bulk_in_desc); | |
754 | if (!midi->in_ep) | |
755 | goto fail; | |
756 | midi->in_ep->driver_data = cdev; /* claim */ | |
757 | ||
758 | midi->out_ep = usb_ep_autoconfig(cdev->gadget, &bulk_out_desc); | |
759 | if (!midi->out_ep) | |
760 | goto fail; | |
761 | midi->out_ep->driver_data = cdev; /* claim */ | |
762 | ||
74203de0 | 763 | /* allocate temporary function list */ |
2a5be878 | 764 | midi_function = kcalloc((MAX_PORTS * 4) + 9, sizeof(*midi_function), |
74203de0 DM |
765 | GFP_KERNEL); |
766 | if (!midi_function) { | |
767 | status = -ENOMEM; | |
768 | goto fail; | |
769 | } | |
770 | ||
c8933c3f DM |
771 | /* |
772 | * construct the function's descriptor set. As the number of | |
773 | * input and output MIDI ports is configurable, we have to do | |
774 | * it that way. | |
775 | */ | |
776 | ||
777 | /* add the headers - these are always the same */ | |
778 | midi_function[i++] = (struct usb_descriptor_header *) &ac_interface_desc; | |
779 | midi_function[i++] = (struct usb_descriptor_header *) &ac_header_desc; | |
780 | midi_function[i++] = (struct usb_descriptor_header *) &ms_interface_desc; | |
781 | ||
782 | /* calculate the header's wTotalLength */ | |
783 | n = USB_DT_MS_HEADER_SIZE | |
74203de0 DM |
784 | + (midi->in_ports + midi->out_ports) * |
785 | (USB_DT_MIDI_IN_SIZE + USB_DT_MIDI_OUT_SIZE(1)); | |
c8933c3f DM |
786 | ms_header_desc.wTotalLength = cpu_to_le16(n); |
787 | ||
788 | midi_function[i++] = (struct usb_descriptor_header *) &ms_header_desc; | |
789 | ||
74203de0 | 790 | /* configure the external IN jacks, each linked to an embedded OUT jack */ |
c8933c3f | 791 | for (n = 0; n < midi->in_ports; n++) { |
74203de0 DM |
792 | struct usb_midi_in_jack_descriptor *in_ext = &jack_in_ext_desc[n]; |
793 | struct usb_midi_out_jack_descriptor_1 *out_emb = &jack_out_emb_desc[n]; | |
794 | ||
795 | in_ext->bLength = USB_DT_MIDI_IN_SIZE; | |
796 | in_ext->bDescriptorType = USB_DT_CS_INTERFACE; | |
797 | in_ext->bDescriptorSubtype = USB_MS_MIDI_IN_JACK; | |
798 | in_ext->bJackType = USB_MS_EXTERNAL; | |
799 | in_ext->bJackID = jack++; | |
800 | in_ext->iJack = 0; | |
801 | midi_function[i++] = (struct usb_descriptor_header *) in_ext; | |
802 | ||
803 | out_emb->bLength = USB_DT_MIDI_OUT_SIZE(1); | |
804 | out_emb->bDescriptorType = USB_DT_CS_INTERFACE; | |
805 | out_emb->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK; | |
806 | out_emb->bJackType = USB_MS_EMBEDDED; | |
807 | out_emb->bJackID = jack++; | |
808 | out_emb->bNrInputPins = 1; | |
809 | out_emb->pins[0].baSourcePin = 1; | |
810 | out_emb->pins[0].baSourceID = in_ext->bJackID; | |
811 | out_emb->iJack = 0; | |
812 | midi_function[i++] = (struct usb_descriptor_header *) out_emb; | |
813 | ||
814 | /* link it to the endpoint */ | |
815 | ms_in_desc.baAssocJackID[n] = out_emb->bJackID; | |
c8933c3f DM |
816 | } |
817 | ||
74203de0 | 818 | /* configure the external OUT jacks, each linked to an embedded IN jack */ |
c8933c3f | 819 | for (n = 0; n < midi->out_ports; n++) { |
74203de0 DM |
820 | struct usb_midi_in_jack_descriptor *in_emb = &jack_in_emb_desc[n]; |
821 | struct usb_midi_out_jack_descriptor_1 *out_ext = &jack_out_ext_desc[n]; | |
822 | ||
823 | in_emb->bLength = USB_DT_MIDI_IN_SIZE; | |
824 | in_emb->bDescriptorType = USB_DT_CS_INTERFACE; | |
825 | in_emb->bDescriptorSubtype = USB_MS_MIDI_IN_JACK; | |
826 | in_emb->bJackType = USB_MS_EMBEDDED; | |
827 | in_emb->bJackID = jack++; | |
828 | in_emb->iJack = 0; | |
829 | midi_function[i++] = (struct usb_descriptor_header *) in_emb; | |
830 | ||
831 | out_ext->bLength = USB_DT_MIDI_OUT_SIZE(1); | |
832 | out_ext->bDescriptorType = USB_DT_CS_INTERFACE; | |
833 | out_ext->bDescriptorSubtype = USB_MS_MIDI_OUT_JACK; | |
834 | out_ext->bJackType = USB_MS_EXTERNAL; | |
835 | out_ext->bJackID = jack++; | |
836 | out_ext->bNrInputPins = 1; | |
837 | out_ext->iJack = 0; | |
838 | out_ext->pins[0].baSourceID = in_emb->bJackID; | |
839 | out_ext->pins[0].baSourcePin = 1; | |
840 | midi_function[i++] = (struct usb_descriptor_header *) out_ext; | |
841 | ||
842 | /* link it to the endpoint */ | |
843 | ms_out_desc.baAssocJackID[n] = in_emb->bJackID; | |
c8933c3f DM |
844 | } |
845 | ||
846 | /* configure the endpoint descriptors ... */ | |
847 | ms_out_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->in_ports); | |
848 | ms_out_desc.bNumEmbMIDIJack = midi->in_ports; | |
c8933c3f DM |
849 | |
850 | ms_in_desc.bLength = USB_DT_MS_ENDPOINT_SIZE(midi->out_ports); | |
851 | ms_in_desc.bNumEmbMIDIJack = midi->out_ports; | |
c8933c3f DM |
852 | |
853 | /* ... and add them to the list */ | |
854 | midi_function[i++] = (struct usb_descriptor_header *) &bulk_out_desc; | |
855 | midi_function[i++] = (struct usb_descriptor_header *) &ms_out_desc; | |
856 | midi_function[i++] = (struct usb_descriptor_header *) &bulk_in_desc; | |
857 | midi_function[i++] = (struct usb_descriptor_header *) &ms_in_desc; | |
858 | midi_function[i++] = NULL; | |
859 | ||
d5daf49b DM |
860 | /* |
861 | * support all relevant hardware speeds... we expect that when | |
862 | * hardware is dual speed, all bulk-capable endpoints work at | |
863 | * both speeds | |
864 | */ | |
865 | /* copy descriptors, and track endpoint copies */ | |
10287bae SAS |
866 | f->fs_descriptors = usb_copy_descriptors(midi_function); |
867 | if (!f->fs_descriptors) | |
7f2a9268 | 868 | goto fail_f_midi; |
10287bae | 869 | |
d5daf49b | 870 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
d5daf49b DM |
871 | bulk_in_desc.wMaxPacketSize = cpu_to_le16(512); |
872 | bulk_out_desc.wMaxPacketSize = cpu_to_le16(512); | |
873 | f->hs_descriptors = usb_copy_descriptors(midi_function); | |
7f2a9268 SAS |
874 | if (!f->hs_descriptors) |
875 | goto fail_f_midi; | |
d5daf49b DM |
876 | } |
877 | ||
74203de0 DM |
878 | kfree(midi_function); |
879 | ||
d5daf49b DM |
880 | return 0; |
881 | ||
7f2a9268 SAS |
882 | fail_f_midi: |
883 | kfree(midi_function); | |
884 | usb_free_descriptors(f->hs_descriptors); | |
d5daf49b | 885 | fail: |
b85e9de9 AP |
886 | f_midi_unregister_card(midi); |
887 | fail_register: | |
d5daf49b DM |
888 | /* we might as well release our claims on endpoints */ |
889 | if (midi->out_ep) | |
890 | midi->out_ep->driver_data = NULL; | |
891 | if (midi->in_ep) | |
892 | midi->in_ep->driver_data = NULL; | |
893 | ||
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 | ||
905 | CONFIGFS_ATTR_STRUCT(f_midi_opts); | |
906 | CONFIGFS_ATTR_OPS(f_midi_opts); | |
907 | ||
908 | static void midi_attr_release(struct config_item *item) | |
909 | { | |
910 | struct f_midi_opts *opts = to_f_midi_opts(item); | |
911 | ||
912 | usb_put_function_instance(&opts->func_inst); | |
913 | } | |
914 | ||
915 | static struct configfs_item_operations midi_item_ops = { | |
916 | .release = midi_attr_release, | |
917 | .show_attribute = f_midi_opts_attr_show, | |
918 | .store_attribute = f_midi_opts_attr_store, | |
919 | }; | |
920 | ||
921 | #define F_MIDI_OPT(name, test_limit, limit) \ | |
922 | static ssize_t f_midi_opts_##name##_show(struct f_midi_opts *opts, char *page) \ | |
923 | { \ | |
924 | int result; \ | |
925 | \ | |
926 | mutex_lock(&opts->lock); \ | |
927 | result = sprintf(page, "%d\n", opts->name); \ | |
928 | mutex_unlock(&opts->lock); \ | |
929 | \ | |
930 | return result; \ | |
931 | } \ | |
932 | \ | |
933 | static ssize_t f_midi_opts_##name##_store(struct f_midi_opts *opts, \ | |
934 | const char *page, size_t len) \ | |
935 | { \ | |
936 | int ret; \ | |
937 | u32 num; \ | |
938 | \ | |
939 | mutex_lock(&opts->lock); \ | |
940 | if (opts->refcnt) { \ | |
941 | ret = -EBUSY; \ | |
942 | goto end; \ | |
943 | } \ | |
944 | \ | |
945 | ret = kstrtou32(page, 0, &num); \ | |
946 | if (ret) \ | |
947 | goto end; \ | |
948 | \ | |
949 | if (test_limit && num > limit) { \ | |
950 | ret = -EINVAL; \ | |
951 | goto end; \ | |
952 | } \ | |
953 | opts->name = num; \ | |
954 | ret = len; \ | |
955 | \ | |
956 | end: \ | |
957 | mutex_unlock(&opts->lock); \ | |
958 | return ret; \ | |
959 | } \ | |
960 | \ | |
961 | static struct f_midi_opts_attribute f_midi_opts_##name = \ | |
962 | __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, f_midi_opts_##name##_show, \ | |
963 | f_midi_opts_##name##_store) | |
964 | ||
965 | F_MIDI_OPT(index, true, SNDRV_CARDS); | |
966 | F_MIDI_OPT(buflen, false, 0); | |
967 | F_MIDI_OPT(qlen, false, 0); | |
968 | F_MIDI_OPT(in_ports, true, MAX_PORTS); | |
969 | F_MIDI_OPT(out_ports, true, MAX_PORTS); | |
970 | ||
971 | static ssize_t f_midi_opts_id_show(struct f_midi_opts *opts, char *page) | |
972 | { | |
973 | int result; | |
974 | ||
975 | mutex_lock(&opts->lock); | |
976 | result = strlcpy(page, opts->id, PAGE_SIZE); | |
977 | mutex_unlock(&opts->lock); | |
978 | ||
979 | return result; | |
980 | } | |
981 | ||
982 | static ssize_t f_midi_opts_id_store(struct f_midi_opts *opts, | |
983 | const char *page, size_t len) | |
984 | { | |
985 | int ret; | |
986 | char *c; | |
987 | ||
988 | mutex_lock(&opts->lock); | |
989 | if (opts->refcnt) { | |
990 | ret = -EBUSY; | |
991 | goto end; | |
992 | } | |
993 | ||
994 | c = kstrndup(page, len, GFP_KERNEL); | |
995 | if (!c) { | |
996 | ret = -ENOMEM; | |
997 | goto end; | |
998 | } | |
999 | if (opts->id_allocated) | |
1000 | kfree(opts->id); | |
1001 | opts->id = c; | |
1002 | opts->id_allocated = true; | |
1003 | ret = len; | |
1004 | end: | |
1005 | mutex_unlock(&opts->lock); | |
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | static struct f_midi_opts_attribute f_midi_opts_id = | |
1010 | __CONFIGFS_ATTR(id, S_IRUGO | S_IWUSR, f_midi_opts_id_show, | |
1011 | f_midi_opts_id_store); | |
1012 | ||
1013 | static struct configfs_attribute *midi_attrs[] = { | |
1014 | &f_midi_opts_index.attr, | |
1015 | &f_midi_opts_buflen.attr, | |
1016 | &f_midi_opts_qlen.attr, | |
1017 | &f_midi_opts_in_ports.attr, | |
1018 | &f_midi_opts_out_ports.attr, | |
1019 | &f_midi_opts_id.attr, | |
1020 | NULL, | |
1021 | }; | |
1022 | ||
1023 | static struct config_item_type midi_func_type = { | |
1024 | .ct_item_ops = &midi_item_ops, | |
1025 | .ct_attrs = midi_attrs, | |
1026 | .ct_owner = THIS_MODULE, | |
1027 | }; | |
1028 | ||
b85e9de9 AP |
1029 | static void f_midi_free_inst(struct usb_function_instance *f) |
1030 | { | |
1031 | struct f_midi_opts *opts; | |
1032 | ||
1033 | opts = container_of(f, struct f_midi_opts, func_inst); | |
1034 | ||
6f1de344 AP |
1035 | if (opts->id_allocated) |
1036 | kfree(opts->id); | |
1037 | ||
b85e9de9 AP |
1038 | kfree(opts); |
1039 | } | |
1040 | ||
1041 | static struct usb_function_instance *f_midi_alloc_inst(void) | |
1042 | { | |
1043 | struct f_midi_opts *opts; | |
1044 | ||
1045 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
1046 | if (!opts) | |
1047 | return ERR_PTR(-ENOMEM); | |
6f1de344 AP |
1048 | |
1049 | mutex_init(&opts->lock); | |
b85e9de9 | 1050 | opts->func_inst.free_func_inst = f_midi_free_inst; |
6f1de344 AP |
1051 | opts->index = SNDRV_DEFAULT_IDX1; |
1052 | opts->id = SNDRV_DEFAULT_STR1; | |
1053 | opts->buflen = 256; | |
1054 | opts->qlen = 32; | |
1055 | opts->in_ports = 1; | |
1056 | opts->out_ports = 1; | |
1057 | ||
1058 | config_group_init_type_name(&opts->func_inst.group, "", | |
1059 | &midi_func_type); | |
b85e9de9 AP |
1060 | |
1061 | return &opts->func_inst; | |
1062 | } | |
1063 | ||
1064 | static void f_midi_free(struct usb_function *f) | |
1065 | { | |
1066 | struct f_midi *midi; | |
1067 | struct f_midi_opts *opts; | |
1068 | int i; | |
1069 | ||
1070 | midi = func_to_midi(f); | |
1071 | opts = container_of(f->fi, struct f_midi_opts, func_inst); | |
1072 | kfree(midi->id); | |
6f1de344 | 1073 | mutex_lock(&opts->lock); |
b85e9de9 AP |
1074 | for (i = opts->in_ports - 1; i >= 0; --i) |
1075 | kfree(midi->in_port[i]); | |
1076 | kfree(midi); | |
6f1de344 AP |
1077 | --opts->refcnt; |
1078 | mutex_unlock(&opts->lock); | |
b85e9de9 AP |
1079 | } |
1080 | ||
1081 | static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f) | |
1082 | { | |
1083 | struct usb_composite_dev *cdev = f->config->cdev; | |
1084 | struct f_midi *midi = func_to_midi(f); | |
1085 | struct snd_card *card; | |
1086 | ||
1087 | DBG(cdev, "unbind\n"); | |
1088 | ||
1089 | /* just to be sure */ | |
1090 | f_midi_disable(f); | |
1091 | ||
1092 | card = midi->card; | |
1093 | midi->card = NULL; | |
1094 | if (card) | |
1095 | snd_card_free(card); | |
1096 | ||
1097 | usb_free_all_descriptors(f); | |
1098 | } | |
1099 | ||
1100 | struct usb_function *f_midi_alloc(struct usb_function_instance *fi) | |
1101 | { | |
1102 | struct f_midi *midi; | |
1103 | struct f_midi_opts *opts; | |
1104 | int status, i; | |
1105 | ||
1106 | opts = container_of(fi, struct f_midi_opts, func_inst); | |
6f1de344 AP |
1107 | |
1108 | mutex_lock(&opts->lock); | |
b85e9de9 | 1109 | /* sanity check */ |
6f1de344 AP |
1110 | if (opts->in_ports > MAX_PORTS || opts->out_ports > MAX_PORTS) { |
1111 | mutex_unlock(&opts->lock); | |
b85e9de9 | 1112 | return ERR_PTR(-EINVAL); |
6f1de344 | 1113 | } |
b85e9de9 AP |
1114 | |
1115 | /* allocate and initialize one new instance */ | |
1116 | midi = kzalloc(sizeof(*midi), GFP_KERNEL); | |
6f1de344 AP |
1117 | if (!midi) { |
1118 | mutex_unlock(&opts->lock); | |
b85e9de9 | 1119 | return ERR_PTR(-ENOMEM); |
6f1de344 | 1120 | } |
b85e9de9 AP |
1121 | |
1122 | for (i = 0; i < opts->in_ports; i++) { | |
1123 | struct gmidi_in_port *port = kzalloc(sizeof(*port), GFP_KERNEL); | |
1124 | ||
1125 | if (!port) { | |
1126 | status = -ENOMEM; | |
6f1de344 | 1127 | mutex_unlock(&opts->lock); |
b85e9de9 AP |
1128 | goto setup_fail; |
1129 | } | |
1130 | ||
1131 | port->midi = midi; | |
1132 | port->active = 0; | |
1133 | port->cable = i; | |
1134 | midi->in_port[i] = port; | |
1135 | } | |
1136 | ||
1137 | /* set up ALSA midi devices */ | |
1138 | midi->id = kstrdup(opts->id, GFP_KERNEL); | |
1139 | if (opts->id && !midi->id) { | |
1140 | status = -ENOMEM; | |
6f1de344 | 1141 | mutex_unlock(&opts->lock); |
b85e9de9 AP |
1142 | goto kstrdup_fail; |
1143 | } | |
1144 | midi->in_ports = opts->in_ports; | |
1145 | midi->out_ports = opts->out_ports; | |
1146 | midi->index = opts->index; | |
1147 | midi->buflen = opts->buflen; | |
1148 | midi->qlen = opts->qlen; | |
6f1de344 AP |
1149 | ++opts->refcnt; |
1150 | mutex_unlock(&opts->lock); | |
b85e9de9 AP |
1151 | |
1152 | midi->func.name = "gmidi function"; | |
b85e9de9 AP |
1153 | midi->func.bind = f_midi_bind; |
1154 | midi->func.unbind = f_midi_unbind; | |
1155 | midi->func.set_alt = f_midi_set_alt; | |
1156 | midi->func.disable = f_midi_disable; | |
1157 | midi->func.free_func = f_midi_free; | |
1158 | ||
1159 | return &midi->func; | |
1160 | ||
1161 | kstrdup_fail: | |
1162 | f_midi_unregister_card(midi); | |
1163 | setup_fail: | |
1164 | for (--i; i >= 0; i--) | |
1165 | kfree(midi->in_port[i]); | |
1166 | kfree(midi); | |
1167 | return ERR_PTR(status); | |
1168 | } | |
1169 | ||
1170 | DECLARE_USB_FUNCTION_INIT(midi, f_midi_alloc_inst, f_midi_alloc); |