Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/staging/line6/driver.c

  1 /*
  2  * Line6 Linux USB driver - 0.9.1beta
  3  *
  4  * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
  5  *
  6  *      This program is free software; you can redistribute it and/or
  7  *      modify it under the terms of the GNU General Public License as
  8  *      published by the Free Software Foundation, version 2.
  9  *
 10  */
 11 
 12 #include <linux/kernel.h>
 13 #include <linux/module.h>
 14 #include <linux/slab.h>
 15 #include <linux/usb.h>
 16 
 17 #include "audio.h"
 18 #include "capture.h"
 19 #include "driver.h"
 20 #include "midi.h"
 21 #include "playback.h"
 22 #include "pod.h"
 23 #include "podhd.h"
 24 #include "revision.h"
 25 #include "toneport.h"
 26 #include "usbdefs.h"
 27 #include "variax.h"
 28 
 29 #define DRIVER_AUTHOR  "Markus Grabner <grabner@icg.tugraz.at>"
 30 #define DRIVER_DESC    "Line6 USB Driver"
 31 #define DRIVER_VERSION "0.9.1beta" DRIVER_REVISION
 32 
 33 /* table of devices that work with this driver */
 34 static const struct usb_device_id line6_id_table[] = {
 35         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXT)},
 36         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXTLIVE)},
 37         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXTPRO)},
 38         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_GUITARPORT)},
 39         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_POCKETPOD)},
 40         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODHD300)},
 41         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODHD400)},
 42         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODHD500)},
 43         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODSTUDIO_GX)},
 44         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODSTUDIO_UX1)},
 45         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODSTUDIO_UX2)},
 46         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODX3)},
 47         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODX3LIVE)},
 48         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXT)},
 49         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXTLIVE)},
 50         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXTPRO)},
 51         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_GX)},
 52         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_UX1)},
 53         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_UX2)},
 54         {USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_VARIAX)},
 55         {},
 56 };
 57 
 58 MODULE_DEVICE_TABLE(usb, line6_id_table);
 59 
 60 #define L6PROP(dev_bit, dev_id, dev_name, dev_cap)\
 61         {.device_bit = LINE6_BIT_##dev_bit, .id = dev_id,\
 62          .name = dev_name, .capabilities = LINE6_BIT_##dev_cap}
 63 
 64 /* *INDENT-OFF* */
 65 static const struct line6_properties line6_properties_table[] = {
 66         L6PROP(BASSPODXT,     "BassPODxt",     "BassPODxt",        CTRL_PCM_HW),
 67         L6PROP(BASSPODXTLIVE, "BassPODxtLive", "BassPODxt Live",   CTRL_PCM_HW),
 68         L6PROP(BASSPODXTPRO,  "BassPODxtPro",  "BassPODxt Pro",    CTRL_PCM_HW),
 69         L6PROP(GUITARPORT,    "GuitarPort",    "GuitarPort",       PCM),
 70         L6PROP(POCKETPOD,     "PocketPOD",     "Pocket POD",       CONTROL),
 71         L6PROP(PODHD300,      "PODHD300",      "POD HD300",        CTRL_PCM_HW),
 72         L6PROP(PODHD400,      "PODHD400",      "POD HD400",        CTRL_PCM_HW),
 73         L6PROP(PODHD500,      "PODHD500",      "POD HD500",        CTRL_PCM_HW),
 74         L6PROP(PODSTUDIO_GX,  "PODStudioGX",   "POD Studio GX",    PCM),
 75         L6PROP(PODSTUDIO_UX1, "PODStudioUX1",  "POD Studio UX1",   PCM),
 76         L6PROP(PODSTUDIO_UX2, "PODStudioUX2",  "POD Studio UX2",   PCM),
 77         L6PROP(PODX3,         "PODX3",         "POD X3",           PCM),
 78         L6PROP(PODX3LIVE,     "PODX3Live",     "POD X3 Live",      PCM),
 79         L6PROP(PODXT,         "PODxt",         "PODxt",            CTRL_PCM_HW),
 80         L6PROP(PODXTLIVE,     "PODxtLive",     "PODxt Live",       CTRL_PCM_HW),
 81         L6PROP(PODXTPRO,      "PODxtPro",      "PODxt Pro",        CTRL_PCM_HW),
 82         L6PROP(TONEPORT_GX,   "TonePortGX",    "TonePort GX",      PCM),
 83         L6PROP(TONEPORT_UX1,  "TonePortUX1",   "TonePort UX1",     PCM),
 84         L6PROP(TONEPORT_UX2,  "TonePortUX2",   "TonePort UX2",     PCM),
 85         L6PROP(VARIAX,        "Variax",        "Variax Workbench", CONTROL),
 86 };
 87 /* *INDENT-ON* */
 88 
 89 /*
 90         This is Line6's MIDI manufacturer ID.
 91 */
 92 const unsigned char line6_midi_id[] = {
 93         0x00, 0x01, 0x0c
 94 };
 95 
 96 /*
 97         Code to request version of POD, Variax interface
 98         (and maybe other devices).
 99 */
100 static const char line6_request_version[] = {
101         0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7
102 };
103 
104 /**
105          Class for asynchronous messages.
106 */
107 struct message {
108         struct usb_line6 *line6;
109         const char *buffer;
110         int size;
111         int done;
112 };
113 
114 /*
115         Forward declarations.
116 */
117 static void line6_data_received(struct urb *urb);
118 static int line6_send_raw_message_async_part(struct message *msg,
119                                              struct urb *urb);
120 
121 /*
122         Start to listen on endpoint.
123 */
124 static int line6_start_listen(struct usb_line6 *line6)
125 {
126         int err;
127 
128         usb_fill_int_urb(line6->urb_listen, line6->usbdev,
129                          usb_rcvintpipe(line6->usbdev, line6->ep_control_read),
130                          line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
131                          line6_data_received, line6, line6->interval);
132         line6->urb_listen->actual_length = 0;
133         err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC);
134         return err;
135 }
136 
137 /*
138         Stop listening on endpoint.
139 */
140 static void line6_stop_listen(struct usb_line6 *line6)
141 {
142         usb_kill_urb(line6->urb_listen);
143 }
144 
145 /*
146         Send raw message in pieces of wMaxPacketSize bytes.
147 */
148 int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
149                            int size)
150 {
151         int i, done = 0;
152 
153         for (i = 0; i < size; i += line6->max_packet_size) {
154                 int partial;
155                 const char *frag_buf = buffer + i;
156                 int frag_size = min(line6->max_packet_size, size - i);
157                 int retval;
158 
159                 retval = usb_interrupt_msg(line6->usbdev,
160                                         usb_sndintpipe(line6->usbdev,
161                                                 line6->ep_control_write),
162                                         (char *)frag_buf, frag_size,
163                                         &partial, LINE6_TIMEOUT * HZ);
164 
165                 if (retval) {
166                         dev_err(line6->ifcdev,
167                                 "usb_interrupt_msg failed (%d)\n", retval);
168                         break;
169                 }
170 
171                 done += frag_size;
172         }
173 
174         return done;
175 }
176 
177 /*
178         Notification of completion of asynchronous request transmission.
179 */
180 static void line6_async_request_sent(struct urb *urb)
181 {
182         struct message *msg = (struct message *)urb->context;
183 
184         if (msg->done >= msg->size) {
185                 usb_free_urb(urb);
186                 kfree(msg);
187         } else
188                 line6_send_raw_message_async_part(msg, urb);
189 }
190 
191 /*
192         Asynchronously send part of a raw message.
193 */
194 static int line6_send_raw_message_async_part(struct message *msg,
195                                              struct urb *urb)
196 {
197         int retval;
198         struct usb_line6 *line6 = msg->line6;
199         int done = msg->done;
200         int bytes = min(msg->size - done, line6->max_packet_size);
201 
202         usb_fill_int_urb(urb, line6->usbdev,
203                          usb_sndintpipe(line6->usbdev, line6->ep_control_write),
204                          (char *)msg->buffer + done, bytes,
205                          line6_async_request_sent, msg, line6->interval);
206 
207         msg->done += bytes;
208         retval = usb_submit_urb(urb, GFP_ATOMIC);
209 
210         if (retval < 0) {
211                 dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n",
212                         __func__, retval);
213                 usb_free_urb(urb);
214                 kfree(msg);
215                 return retval;
216         }
217 
218         return 0;
219 }
220 
221 /*
222         Setup and start timer.
223 */
224 void line6_start_timer(struct timer_list *timer, unsigned int msecs,
225                        void (*function)(unsigned long), unsigned long data)
226 {
227         setup_timer(timer, function, data);
228         timer->expires = jiffies + msecs * HZ / 1000;
229         add_timer(timer);
230 }
231 
232 /*
233         Asynchronously send raw message.
234 */
235 int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer,
236                                  int size)
237 {
238         struct message *msg;
239         struct urb *urb;
240 
241         /* create message: */
242         msg = kmalloc(sizeof(struct message), GFP_ATOMIC);
243         if (msg == NULL)
244                 return -ENOMEM;
245 
246         /* create URB: */
247         urb = usb_alloc_urb(0, GFP_ATOMIC);
248 
249         if (urb == NULL) {
250                 kfree(msg);
251                 dev_err(line6->ifcdev, "Out of memory\n");
252                 return -ENOMEM;
253         }
254 
255         /* set message data: */
256         msg->line6 = line6;
257         msg->buffer = buffer;
258         msg->size = size;
259         msg->done = 0;
260 
261         /* start sending: */
262         return line6_send_raw_message_async_part(msg, urb);
263 }
264 
265 /*
266         Send asynchronous device version request.
267 */
268 int line6_version_request_async(struct usb_line6 *line6)
269 {
270         char *buffer;
271         int retval;
272 
273         buffer = kmemdup(line6_request_version,
274                         sizeof(line6_request_version), GFP_ATOMIC);
275         if (buffer == NULL) {
276                 dev_err(line6->ifcdev, "Out of memory");
277                 return -ENOMEM;
278         }
279 
280         retval = line6_send_raw_message_async(line6, buffer,
281                                               sizeof(line6_request_version));
282         kfree(buffer);
283         return retval;
284 }
285 
286 /*
287         Send sysex message in pieces of wMaxPacketSize bytes.
288 */
289 int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer,
290                              int size)
291 {
292         return line6_send_raw_message(line6, buffer,
293                                       size + SYSEX_EXTRA_SIZE) -
294             SYSEX_EXTRA_SIZE;
295 }
296 
297 /*
298         Allocate buffer for sysex message and prepare header.
299         @param code sysex message code
300         @param size number of bytes between code and sysex end
301 */
302 char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2,
303                                int size)
304 {
305         char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC);
306 
307         if (!buffer)
308                 return NULL;
309 
310         buffer[0] = LINE6_SYSEX_BEGIN;
311         memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id));
312         buffer[sizeof(line6_midi_id) + 1] = code1;
313         buffer[sizeof(line6_midi_id) + 2] = code2;
314         buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END;
315         return buffer;
316 }
317 
318 /*
319         Notification of data received from the Line6 device.
320 */
321 static void line6_data_received(struct urb *urb)
322 {
323         struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
324         struct midi_buffer *mb = &line6->line6midi->midibuf_in;
325         int done;
326 
327         if (urb->status == -ESHUTDOWN)
328                 return;
329 
330         done =
331             line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
332 
333         if (done < urb->actual_length) {
334                 line6_midibuf_ignore(mb, done);
335                 dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n",
336                         done, urb->actual_length);
337         }
338 
339         for (;;) {
340                 done =
341                     line6_midibuf_read(mb, line6->buffer_message,
342                                        LINE6_MESSAGE_MAXLEN);
343 
344                 if (done == 0)
345                         break;
346 
347                 line6->message_length = done;
348                 line6_midi_receive(line6, line6->buffer_message, done);
349 
350                 switch (le16_to_cpu(line6->usbdev->descriptor.idProduct)) {
351                 case LINE6_DEVID_BASSPODXT:
352                 case LINE6_DEVID_BASSPODXTLIVE:
353                 case LINE6_DEVID_BASSPODXTPRO:
354                 case LINE6_DEVID_PODXT:
355                 case LINE6_DEVID_PODXTPRO:
356                 case LINE6_DEVID_POCKETPOD:
357                         line6_pod_process_message((struct usb_line6_pod *)
358                                                   line6);
359                         break;
360 
361                 case LINE6_DEVID_PODHD300:
362                 case LINE6_DEVID_PODHD400:
363                 case LINE6_DEVID_PODHD500:
364                         break; /* let userspace handle MIDI */
365 
366                 case LINE6_DEVID_PODXTLIVE:
367                         switch (line6->interface_number) {
368                         case PODXTLIVE_INTERFACE_POD:
369                                 line6_pod_process_message((struct usb_line6_pod
370                                                            *)line6);
371                                 break;
372 
373                         case PODXTLIVE_INTERFACE_VARIAX:
374                                 line6_variax_process_message((struct
375                                                               usb_line6_variax
376                                                               *)line6);
377                                 break;
378 
379                         default:
380                                 dev_err(line6->ifcdev,
381                                         "PODxt Live interface %d not supported\n",
382                                         line6->interface_number);
383                         }
384                         break;
385 
386                 case LINE6_DEVID_VARIAX:
387                         line6_variax_process_message((struct usb_line6_variax *)
388                                                      line6);
389                         break;
390 
391                 default:
392                         MISSING_CASE;
393                 }
394         }
395 
396         line6_start_listen(line6);
397 }
398 
399 /*
400         Send channel number (i.e., switch to a different sound).
401 */
402 int line6_send_program(struct usb_line6 *line6, u8 value)
403 {
404         int retval;
405         unsigned char *buffer;
406         int partial;
407 
408         buffer = kmalloc(2, GFP_KERNEL);
409         if (!buffer)
410                 return -ENOMEM;
411 
412         buffer[0] = LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_HOST;
413         buffer[1] = value;
414 
415         retval = usb_interrupt_msg(line6->usbdev,
416                                    usb_sndintpipe(line6->usbdev,
417                                                   line6->ep_control_write),
418                                    buffer, 2, &partial, LINE6_TIMEOUT * HZ);
419 
420         if (retval)
421                 dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n",
422                         retval);
423 
424         kfree(buffer);
425         return retval;
426 }
427 
428 /*
429         Transmit Line6 control parameter.
430 */
431 int line6_transmit_parameter(struct usb_line6 *line6, int param, u8 value)
432 {
433         int retval;
434         unsigned char *buffer;
435         int partial;
436 
437         buffer = kmalloc(3, GFP_KERNEL);
438         if (!buffer)
439                 return -ENOMEM;
440 
441         buffer[0] = LINE6_PARAM_CHANGE | LINE6_CHANNEL_HOST;
442         buffer[1] = param;
443         buffer[2] = value;
444 
445         retval = usb_interrupt_msg(line6->usbdev,
446                                    usb_sndintpipe(line6->usbdev,
447                                                   line6->ep_control_write),
448                                    buffer, 3, &partial, LINE6_TIMEOUT * HZ);
449 
450         if (retval)
451                 dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n",
452                         retval);
453 
454         kfree(buffer);
455         return retval;
456 }
457 
458 /*
459         Read data from device.
460 */
461 int line6_read_data(struct usb_line6 *line6, int address, void *data,
462                     size_t datalen)
463 {
464         struct usb_device *usbdev = line6->usbdev;
465         int ret;
466         unsigned char len;
467 
468         /* query the serial number: */
469         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
470                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
471                               (datalen << 8) | 0x21, address,
472                               NULL, 0, LINE6_TIMEOUT * HZ);
473 
474         if (ret < 0) {
475                 dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
476                 return ret;
477         }
478 
479         /* Wait for data length. We'll get 0xff until length arrives. */
480         do {
481                 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
482                                       USB_TYPE_VENDOR | USB_RECIP_DEVICE |
483                                       USB_DIR_IN,
484                                       0x0012, 0x0000, &len, 1,
485                                       LINE6_TIMEOUT * HZ);
486                 if (ret < 0) {
487                         dev_err(line6->ifcdev,
488                                 "receive length failed (error %d)\n", ret);
489                         return ret;
490                 }
491         } while (len == 0xff);
492 
493         if (len != datalen) {
494                 /* should be equal or something went wrong */
495                 dev_err(line6->ifcdev,
496                         "length mismatch (expected %d, got %d)\n",
497                         (int)datalen, (int)len);
498                 return -EINVAL;
499         }
500 
501         /* receive the result: */
502         ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
503                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
504                               0x0013, 0x0000, data, datalen,
505                               LINE6_TIMEOUT * HZ);
506 
507         if (ret < 0) {
508                 dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
509                 return ret;
510         }
511 
512         return 0;
513 }
514 
515 /*
516         Write data to device.
517 */
518 int line6_write_data(struct usb_line6 *line6, int address, void *data,
519                      size_t datalen)
520 {
521         struct usb_device *usbdev = line6->usbdev;
522         int ret;
523         unsigned char status;
524 
525         ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
526                               USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
527                               0x0022, address, data, datalen,
528                               LINE6_TIMEOUT * HZ);
529 
530         if (ret < 0) {
531                 dev_err(line6->ifcdev,
532                         "write request failed (error %d)\n", ret);
533                 return ret;
534         }
535 
536         do {
537                 ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
538                                       0x67,
539                                       USB_TYPE_VENDOR | USB_RECIP_DEVICE |
540                                       USB_DIR_IN,
541                                       0x0012, 0x0000,
542                                       &status, 1, LINE6_TIMEOUT * HZ);
543 
544                 if (ret < 0) {
545                         dev_err(line6->ifcdev,
546                                 "receiving status failed (error %d)\n", ret);
547                         return ret;
548                 }
549         } while (status == 0xff);
550 
551         if (status != 0) {
552                 dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
553                 return -EINVAL;
554         }
555 
556         return 0;
557 }
558 
559 /*
560         Read Line6 device serial number.
561         (POD, TonePort, GuitarPort)
562 */
563 int line6_read_serial_number(struct usb_line6 *line6, int *serial_number)
564 {
565         return line6_read_data(line6, 0x80d0, serial_number,
566                                sizeof(*serial_number));
567 }
568 
569 /*
570         No operation (i.e., unsupported).
571 */
572 ssize_t line6_nop_read(struct device *dev, struct device_attribute *attr,
573                        char *buf)
574 {
575         return 0;
576 }
577 
578 /*
579         Generic destructor.
580 */
581 static void line6_destruct(struct usb_interface *interface)
582 {
583         struct usb_line6 *line6;
584 
585         if (interface == NULL)
586                 return;
587         line6 = usb_get_intfdata(interface);
588         if (line6 == NULL)
589                 return;
590 
591         /* free buffer memory first: */
592         kfree(line6->buffer_message);
593         kfree(line6->buffer_listen);
594 
595         /* then free URBs: */
596         usb_free_urb(line6->urb_listen);
597 
598         /* make sure the device isn't destructed twice: */
599         usb_set_intfdata(interface, NULL);
600 
601         /* free interface data: */
602         kfree(line6);
603 }
604 
605 /*
606         Probe USB device.
607 */
608 static int line6_probe(struct usb_interface *interface,
609                        const struct usb_device_id *id)
610 {
611         int devtype;
612         struct usb_device *usbdev;
613         struct usb_line6 *line6;
614         const struct line6_properties *properties;
615         int interface_number, alternate = 0;
616         int product;
617         int size = 0;
618         int ep_read = 0, ep_write = 0;
619         int ret;
620 
621         if (interface == NULL)
622                 return -ENODEV;
623         usbdev = interface_to_usbdev(interface);
624         if (usbdev == NULL)
625                 return -ENODEV;
626 
627         /* we don't handle multiple configurations */
628         if (usbdev->descriptor.bNumConfigurations != 1) {
629                 ret = -ENODEV;
630                 goto err_put;
631         }
632 
633         /* check vendor and product id */
634         for (devtype = ARRAY_SIZE(line6_id_table) - 1; devtype--;) {
635                 u16 idVendor = le16_to_cpu(usbdev->descriptor.idVendor);
636                 u16 idProduct = le16_to_cpu(usbdev->descriptor.idProduct);
637 
638                 if (idVendor == line6_id_table[devtype].idVendor &&
639                     idProduct == line6_id_table[devtype].idProduct)
640                         break;
641         }
642 
643         if (devtype < 0) {
644                 ret = -ENODEV;
645                 goto err_put;
646         }
647 
648         /* initialize device info: */
649         properties = &line6_properties_table[devtype];
650         dev_info(&interface->dev, "Line6 %s found\n", properties->name);
651         product = le16_to_cpu(usbdev->descriptor.idProduct);
652 
653         /* query interface number */
654         interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
655 
656         switch (product) {
657         case LINE6_DEVID_BASSPODXTLIVE:
658         case LINE6_DEVID_PODXTLIVE:
659         case LINE6_DEVID_VARIAX:
660                 alternate = 1;
661                 break;
662 
663         case LINE6_DEVID_POCKETPOD:
664                 switch (interface_number) {
665                 case 0:
666                         return 0;       /* this interface has no endpoints */
667                 case 1:
668                         alternate = 0;
669                         break;
670                 default:
671                         MISSING_CASE;
672                 }
673                 break;
674 
675         case LINE6_DEVID_PODHD500:
676         case LINE6_DEVID_PODX3:
677         case LINE6_DEVID_PODX3LIVE:
678                 switch (interface_number) {
679                 case 0:
680                         alternate = 1;
681                         break;
682                 case 1:
683                         alternate = 0;
684                         break;
685                 default:
686                         MISSING_CASE;
687                 }
688                 break;
689 
690         case LINE6_DEVID_BASSPODXT:
691         case LINE6_DEVID_BASSPODXTPRO:
692         case LINE6_DEVID_PODXT:
693         case LINE6_DEVID_PODXTPRO:
694         case LINE6_DEVID_PODHD300:
695         case LINE6_DEVID_PODHD400:
696                 alternate = 5;
697                 break;
698 
699         case LINE6_DEVID_GUITARPORT:
700         case LINE6_DEVID_PODSTUDIO_GX:
701         case LINE6_DEVID_PODSTUDIO_UX1:
702         case LINE6_DEVID_TONEPORT_GX:
703         case LINE6_DEVID_TONEPORT_UX1:
704                 alternate = 2;  /* 1..4 seem to be ok */
705                 break;
706 
707         case LINE6_DEVID_TONEPORT_UX2:
708         case LINE6_DEVID_PODSTUDIO_UX2:
709                 switch (interface_number) {
710                 case 0:
711                         /* defaults to 44.1kHz, 16-bit */
712                         alternate = 2;
713                         break;
714                 case 1:
715                         /* don't know yet what this is ...
716                            alternate = 1;
717                            break;
718                          */
719                         return -ENODEV;
720                 default:
721                         MISSING_CASE;
722                 }
723                 break;
724 
725         default:
726                 MISSING_CASE;
727                 ret = -ENODEV;
728                 goto err_put;
729         }
730 
731         ret = usb_set_interface(usbdev, interface_number, alternate);
732         if (ret < 0) {
733                 dev_err(&interface->dev, "set_interface failed\n");
734                 goto err_put;
735         }
736 
737         /* initialize device data based on product id: */
738         switch (product) {
739         case LINE6_DEVID_BASSPODXT:
740         case LINE6_DEVID_BASSPODXTLIVE:
741         case LINE6_DEVID_BASSPODXTPRO:
742         case LINE6_DEVID_PODXT:
743         case LINE6_DEVID_PODXTPRO:
744                 size = sizeof(struct usb_line6_pod);
745                 ep_read = 0x84;
746                 ep_write = 0x03;
747                 break;
748 
749         case LINE6_DEVID_PODHD300:
750         case LINE6_DEVID_PODHD400:
751                 size = sizeof(struct usb_line6_podhd);
752                 ep_read = 0x84;
753                 ep_write = 0x03;
754                 break;
755 
756         case LINE6_DEVID_PODHD500:
757                 size = sizeof(struct usb_line6_podhd);
758                 ep_read = 0x81;
759                 ep_write = 0x01;
760                 break;
761 
762         case LINE6_DEVID_POCKETPOD:
763                 size = sizeof(struct usb_line6_pod);
764                 ep_read = 0x82;
765                 ep_write = 0x02;
766                 break;
767 
768         case LINE6_DEVID_PODX3:
769         case LINE6_DEVID_PODX3LIVE:
770                 /* currently unused! */
771                 size = sizeof(struct usb_line6_pod);
772                 ep_read = 0x81;
773                 ep_write = 0x01;
774                 break;
775 
776         case LINE6_DEVID_PODSTUDIO_GX:
777         case LINE6_DEVID_PODSTUDIO_UX1:
778         case LINE6_DEVID_PODSTUDIO_UX2:
779         case LINE6_DEVID_TONEPORT_GX:
780         case LINE6_DEVID_TONEPORT_UX1:
781         case LINE6_DEVID_TONEPORT_UX2:
782         case LINE6_DEVID_GUITARPORT:
783                 size = sizeof(struct usb_line6_toneport);
784                 /* these don't have a control channel */
785                 break;
786 
787         case LINE6_DEVID_PODXTLIVE:
788                 switch (interface_number) {
789                 case PODXTLIVE_INTERFACE_POD:
790                         size = sizeof(struct usb_line6_pod);
791                         ep_read = 0x84;
792                         ep_write = 0x03;
793                         break;
794 
795                 case PODXTLIVE_INTERFACE_VARIAX:
796                         size = sizeof(struct usb_line6_variax);
797                         ep_read = 0x86;
798                         ep_write = 0x05;
799                         break;
800 
801                 default:
802                         ret = -ENODEV;
803                         goto err_put;
804                 }
805                 break;
806 
807         case LINE6_DEVID_VARIAX:
808                 size = sizeof(struct usb_line6_variax);
809                 ep_read = 0x82;
810                 ep_write = 0x01;
811                 break;
812 
813         default:
814                 MISSING_CASE;
815                 ret = -ENODEV;
816                 goto err_put;
817         }
818 
819         if (size == 0) {
820                 dev_err(&interface->dev,
821                         "driver bug: interface data size not set\n");
822                 ret = -ENODEV;
823                 goto err_put;
824         }
825 
826         line6 = kzalloc(size, GFP_KERNEL);
827         if (line6 == NULL) {
828                 ret = -ENODEV;
829                 goto err_put;
830         }
831 
832         /* store basic data: */
833         line6->interface_number = interface_number;
834         line6->properties = properties;
835         line6->usbdev = usbdev;
836         line6->ifcdev = &interface->dev;
837         line6->ep_control_read = ep_read;
838         line6->ep_control_write = ep_write;
839         line6->product = product;
840 
841         /* get data from endpoint descriptor (see usb_maxpacket): */
842         {
843                 struct usb_host_endpoint *ep;
844                 unsigned epnum =
845                     usb_pipeendpoint(usb_rcvintpipe(usbdev, ep_read));
846                 ep = usbdev->ep_in[epnum];
847 
848                 if (ep != NULL) {
849                         line6->interval = ep->desc.bInterval;
850                         line6->max_packet_size =
851                             le16_to_cpu(ep->desc.wMaxPacketSize);
852                 } else {
853                         line6->interval = LINE6_FALLBACK_INTERVAL;
854                         line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE;
855                         dev_err(line6->ifcdev,
856                                 "endpoint not available, using fallback values");
857                 }
858         }
859 
860         usb_set_intfdata(interface, line6);
861 
862         if (properties->capabilities & LINE6_BIT_CONTROL) {
863                 /* initialize USB buffers: */
864                 line6->buffer_listen =
865                     kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL);
866                 if (line6->buffer_listen == NULL) {
867                         ret = -ENOMEM;
868                         goto err_destruct;
869                 }
870 
871                 line6->buffer_message =
872                     kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);
873                 if (line6->buffer_message == NULL) {
874                         ret = -ENOMEM;
875                         goto err_destruct;
876                 }
877 
878                 line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
879 
880                 if (line6->urb_listen == NULL) {
881                         dev_err(&interface->dev, "Out of memory\n");
882                         line6_destruct(interface);
883                         ret = -ENOMEM;
884                         goto err_destruct;
885                 }
886 
887                 ret = line6_start_listen(line6);
888                 if (ret < 0) {
889                         dev_err(&interface->dev, "%s: usb_submit_urb failed\n",
890                                 __func__);
891                         goto err_destruct;
892                 }
893         }
894 
895         /* initialize device data based on product id: */
896         switch (product) {
897         case LINE6_DEVID_BASSPODXT:
898         case LINE6_DEVID_BASSPODXTLIVE:
899         case LINE6_DEVID_BASSPODXTPRO:
900         case LINE6_DEVID_POCKETPOD:
901         case LINE6_DEVID_PODX3:
902         case LINE6_DEVID_PODX3LIVE:
903         case LINE6_DEVID_PODXT:
904         case LINE6_DEVID_PODXTPRO:
905                 ret = line6_pod_init(interface, (struct usb_line6_pod *)line6);
906                 break;
907 
908         case LINE6_DEVID_PODHD300:
909         case LINE6_DEVID_PODHD400:
910         case LINE6_DEVID_PODHD500:
911                 ret = line6_podhd_init(interface,
912                                        (struct usb_line6_podhd *)line6);
913                 break;
914 
915         case LINE6_DEVID_PODXTLIVE:
916                 switch (interface_number) {
917                 case PODXTLIVE_INTERFACE_POD:
918                         ret =
919                             line6_pod_init(interface,
920                                            (struct usb_line6_pod *)line6);
921                         break;
922 
923                 case PODXTLIVE_INTERFACE_VARIAX:
924                         ret =
925                             line6_variax_init(interface,
926                                               (struct usb_line6_variax *)line6);
927                         break;
928 
929                 default:
930                         dev_err(&interface->dev,
931                                 "PODxt Live interface %d not supported\n",
932                                 interface_number);
933                         ret = -ENODEV;
934                 }
935 
936                 break;
937 
938         case LINE6_DEVID_VARIAX:
939                 ret =
940                     line6_variax_init(interface,
941                                       (struct usb_line6_variax *)line6);
942                 break;
943 
944         case LINE6_DEVID_PODSTUDIO_GX:
945         case LINE6_DEVID_PODSTUDIO_UX1:
946         case LINE6_DEVID_PODSTUDIO_UX2:
947         case LINE6_DEVID_TONEPORT_GX:
948         case LINE6_DEVID_TONEPORT_UX1:
949         case LINE6_DEVID_TONEPORT_UX2:
950         case LINE6_DEVID_GUITARPORT:
951                 ret =
952                     line6_toneport_init(interface,
953                                         (struct usb_line6_toneport *)line6);
954                 break;
955 
956         default:
957                 MISSING_CASE;
958                 ret = -ENODEV;
959         }
960 
961         if (ret < 0)
962                 goto err_destruct;
963 
964         ret = sysfs_create_link(&interface->dev.kobj, &usbdev->dev.kobj,
965                                 "usb_device");
966         if (ret < 0)
967                 goto err_destruct;
968 
969         /* creation of additional special files should go here */
970 
971         dev_info(&interface->dev, "Line6 %s now attached\n",
972                  line6->properties->name);
973 
974         switch (product) {
975         case LINE6_DEVID_PODX3:
976         case LINE6_DEVID_PODX3LIVE:
977                 dev_info(&interface->dev,
978                          "NOTE: the Line6 %s is detected, but not yet supported\n",
979                          line6->properties->name);
980         }
981 
982         /* increment reference counters: */
983         usb_get_intf(interface);
984         usb_get_dev(usbdev);
985 
986         return 0;
987 
988 err_destruct:
989         line6_destruct(interface);
990 err_put:
991         return ret;
992 }
993 
994 /*
995         Line6 device disconnected.
996 */
997 static void line6_disconnect(struct usb_interface *interface)
998 {
999         struct usb_line6 *line6;
1000         struct usb_device *usbdev;
1001         int interface_number;
1002 
1003         if (interface == NULL)
1004                 return;
1005         usbdev = interface_to_usbdev(interface);
1006         if (usbdev == NULL)
1007                 return;
1008 
1009         /* removal of additional special files should go here */
1010 
1011         sysfs_remove_link(&interface->dev.kobj, "usb_device");
1012 
1013         interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
1014         line6 = usb_get_intfdata(interface);
1015 
1016         if (line6 != NULL) {
1017                 if (line6->urb_listen != NULL)
1018                         line6_stop_listen(line6);
1019 
1020                 if (usbdev != line6->usbdev)
1021                         dev_err(line6->ifcdev,
1022                                 "driver bug: inconsistent usb device\n");
1023 
1024                 switch (le16_to_cpu(line6->usbdev->descriptor.idProduct)) {
1025                 case LINE6_DEVID_BASSPODXT:
1026                 case LINE6_DEVID_BASSPODXTLIVE:
1027                 case LINE6_DEVID_BASSPODXTPRO:
1028                 case LINE6_DEVID_POCKETPOD:
1029                 case LINE6_DEVID_PODX3:
1030                 case LINE6_DEVID_PODX3LIVE:
1031                 case LINE6_DEVID_PODXT:
1032                 case LINE6_DEVID_PODXTPRO:
1033                         line6_pod_disconnect(interface);
1034                         break;
1035 
1036                 case LINE6_DEVID_PODHD300:
1037                 case LINE6_DEVID_PODHD400:
1038                 case LINE6_DEVID_PODHD500:
1039                         line6_podhd_disconnect(interface);
1040                         break;
1041 
1042                 case LINE6_DEVID_PODXTLIVE:
1043                         switch (interface_number) {
1044                         case PODXTLIVE_INTERFACE_POD:
1045                                 line6_pod_disconnect(interface);
1046                                 break;
1047 
1048                         case PODXTLIVE_INTERFACE_VARIAX:
1049                                 line6_variax_disconnect(interface);
1050                                 break;
1051                         }
1052 
1053                         break;
1054 
1055                 case LINE6_DEVID_VARIAX:
1056                         line6_variax_disconnect(interface);
1057                         break;
1058 
1059                 case LINE6_DEVID_PODSTUDIO_GX:
1060                 case LINE6_DEVID_PODSTUDIO_UX1:
1061                 case LINE6_DEVID_PODSTUDIO_UX2:
1062                 case LINE6_DEVID_TONEPORT_GX:
1063                 case LINE6_DEVID_TONEPORT_UX1:
1064                 case LINE6_DEVID_TONEPORT_UX2:
1065                 case LINE6_DEVID_GUITARPORT:
1066                         line6_toneport_disconnect(interface);
1067                         break;
1068 
1069                 default:
1070                         MISSING_CASE;
1071                 }
1072 
1073                 dev_info(&interface->dev, "Line6 %s now disconnected\n",
1074                          line6->properties->name);
1075         }
1076 
1077         line6_destruct(interface);
1078 
1079         /* decrement reference counters: */
1080         usb_put_intf(interface);
1081         usb_put_dev(usbdev);
1082 }
1083 
1084 #ifdef CONFIG_PM
1085 
1086 /*
1087         Suspend Line6 device.
1088 */
1089 static int line6_suspend(struct usb_interface *interface, pm_message_t message)
1090 {
1091         struct usb_line6 *line6 = usb_get_intfdata(interface);
1092         struct snd_line6_pcm *line6pcm = line6->line6pcm;
1093 
1094         snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);
1095 
1096         if (line6->properties->capabilities & LINE6_BIT_CONTROL)
1097                 line6_stop_listen(line6);
1098 
1099         if (line6pcm != NULL) {
1100                 snd_pcm_suspend_all(line6pcm->pcm);
1101                 line6_pcm_disconnect(line6pcm);
1102                 line6pcm->flags = 0;
1103         }
1104 
1105         return 0;
1106 }
1107 
1108 /*
1109         Resume Line6 device.
1110 */
1111 static int line6_resume(struct usb_interface *interface)
1112 {
1113         struct usb_line6 *line6 = usb_get_intfdata(interface);
1114 
1115         if (line6->properties->capabilities & LINE6_BIT_CONTROL)
1116                 line6_start_listen(line6);
1117 
1118         snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);
1119         return 0;
1120 }
1121 
1122 /*
1123         Resume Line6 device after reset.
1124 */
1125 static int line6_reset_resume(struct usb_interface *interface)
1126 {
1127         struct usb_line6 *line6 = usb_get_intfdata(interface);
1128 
1129         switch (le16_to_cpu(line6->usbdev->descriptor.idProduct)) {
1130         case LINE6_DEVID_PODSTUDIO_GX:
1131         case LINE6_DEVID_PODSTUDIO_UX1:
1132         case LINE6_DEVID_PODSTUDIO_UX2:
1133         case LINE6_DEVID_TONEPORT_GX:
1134         case LINE6_DEVID_TONEPORT_UX1:
1135         case LINE6_DEVID_TONEPORT_UX2:
1136         case LINE6_DEVID_GUITARPORT:
1137                 line6_toneport_reset_resume((struct usb_line6_toneport *)line6);
1138         }
1139 
1140         return line6_resume(interface);
1141 }
1142 
1143 #endif /* CONFIG_PM */
1144 
1145 static struct usb_driver line6_driver = {
1146         .name = DRIVER_NAME,
1147         .probe = line6_probe,
1148         .disconnect = line6_disconnect,
1149 #ifdef CONFIG_PM
1150         .suspend = line6_suspend,
1151         .resume = line6_resume,
1152         .reset_resume = line6_reset_resume,
1153 #endif
1154         .id_table = line6_id_table,
1155 };
1156 
1157 module_usb_driver(line6_driver);
1158 
1159 MODULE_AUTHOR(DRIVER_AUTHOR);
1160 MODULE_DESCRIPTION(DRIVER_DESC);
1161 MODULE_LICENSE("GPL");
1162 MODULE_VERSION(DRIVER_VERSION);
1163 

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