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Linux/sound/usb/usx2y/usbusx2y.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  * usbusy2y.c - ALSA USB US-428 Driver
  4  *
  5 2005-04-14 Karsten Wiese
  6         Version 0.8.7.2:
  7         Call snd_card_free() instead of snd_card_free_in_thread() to prevent oops with dead keyboard symptom.
  8         Tested ok with kernel 2.6.12-rc2.
  9 
 10 2004-12-14 Karsten Wiese
 11         Version 0.8.7.1:
 12         snd_pcm_open for rawusb pcm-devices now returns -EBUSY if called without rawusb's hwdep device being open.
 13 
 14 2004-12-02 Karsten Wiese
 15         Version 0.8.7:
 16         Use macro usb_maxpacket() for portability.
 17 
 18 2004-10-26 Karsten Wiese
 19         Version 0.8.6:
 20         wake_up() process waiting in usx2y_urbs_start() on error.
 21 
 22 2004-10-21 Karsten Wiese
 23         Version 0.8.5:
 24         nrpacks is runtime or compiletime configurable now with tested values from 1 to 4.
 25 
 26 2004-10-03 Karsten Wiese
 27         Version 0.8.2:
 28         Avoid any possible racing while in prepare callback.
 29 
 30 2004-09-30 Karsten Wiese
 31         Version 0.8.0:
 32         Simplified things and made ohci work again.
 33 
 34 2004-09-20 Karsten Wiese
 35         Version 0.7.3:
 36         Use usb_kill_urb() instead of deprecated (kernel 2.6.9) usb_unlink_urb().
 37 
 38 2004-07-13 Karsten Wiese
 39         Version 0.7.1:
 40         Don't sleep in START/STOP callbacks anymore.
 41         us428 channels C/D not handled just for this version, sorry.
 42 
 43 2004-06-21 Karsten Wiese
 44         Version 0.6.4:
 45         Temporarely suspend midi input
 46         to sanely call usb_set_interface() when setting format.
 47 
 48 2004-06-12 Karsten Wiese
 49         Version 0.6.3:
 50         Made it thus the following rule is enforced:
 51         "All pcm substreams of one usx2y have to operate at the same rate & format."
 52 
 53 2004-04-06 Karsten Wiese
 54         Version 0.6.0:
 55         Runs on 2.6.5 kernel without any "--with-debug=" things.
 56         us224 reported running.
 57 
 58 2004-01-14 Karsten Wiese
 59         Version 0.5.1:
 60         Runs with 2.6.1 kernel.
 61 
 62 2003-12-30 Karsten Wiese
 63         Version 0.4.1:
 64         Fix 24Bit 4Channel capturing for the us428.
 65 
 66 2003-11-27 Karsten Wiese, Martin Langer
 67         Version 0.4:
 68         us122 support.
 69         us224 could be tested by uncommenting the sections containing USB_ID_US224
 70 
 71 2003-11-03 Karsten Wiese
 72         Version 0.3:
 73         24Bit support.
 74         "arecord -D hw:1 -c 2 -r 48000 -M -f S24_3LE|aplay -D hw:1 -c 2 -r 48000 -M -f S24_3LE" works.
 75 
 76 2003-08-22 Karsten Wiese
 77         Version 0.0.8:
 78         Removed EZUSB Firmware. First Stage Firmwaredownload is now done by tascam-firmware downloader.
 79         See:
 80         http://usb-midi-fw.sourceforge.net/tascam-firmware.tar.gz
 81 
 82 2003-06-18 Karsten Wiese
 83         Version 0.0.5:
 84         changed to compile with kernel 2.4.21 and alsa 0.9.4
 85 
 86 2002-10-16 Karsten Wiese
 87         Version 0.0.4:
 88         compiles again with alsa-current.
 89         USB_ISO_ASAP not used anymore (most of the time), instead
 90         urb->start_frame is calculated here now, some calls inside usb-driver don't need to happen anymore.
 91 
 92         To get the best out of this:
 93         Disable APM-support in the kernel as APM-BIOS calls (once each second) hard disable interrupt for many precious milliseconds.
 94         This helped me much on my slowish PII 400 & PIII 500.
 95         ACPI yet untested but might cause the same bad behaviour.
 96         Use a kernel with lowlatency and preemptiv patches applied.
 97         To autoload snd-usb-midi append a line
 98                 post-install snd-usb-us428 modprobe snd-usb-midi
 99         to /etc/modules.conf.
100 
101         known problems:
102         sliders, knobs, lights not yet handled except MASTER Volume slider.
103         "pcm -c 2" doesn't work. "pcm -c 2 -m direct_interleaved" does.
104         KDE3: "Enable full duplex operation" deadlocks.
105 
106 2002-08-31 Karsten Wiese
107         Version 0.0.3: audio also simplex;
108         simplifying: iso urbs only 1 packet, melted structs.
109         ASYNC_UNLINK not used anymore: no more crashes so far.....
110         for alsa 0.9 rc3.
111 
112 2002-08-09 Karsten Wiese
113         Version 0.0.2: midi works with snd-usb-midi, audio (only fullduplex now) with i.e. bristol.
114         The firmware has been sniffed from win2k us-428 driver 3.09.
115 
116  *   Copyright (c) 2002 - 2004 Karsten Wiese
117  */
118 
119 #include <linux/init.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/slab.h>
123 #include <linux/interrupt.h>
124 #include <linux/usb.h>
125 #include <sound/core.h>
126 #include <sound/initval.h>
127 #include <sound/pcm.h>
128 
129 #include <sound/rawmidi.h>
130 #include "usx2y.h"
131 #include "usbusx2y.h"
132 #include "usX2Yhwdep.h"
133 
134 MODULE_AUTHOR("Karsten Wiese <annabellesgarden@yahoo.de>");
135 MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.8.7.2");
136 MODULE_LICENSE("GPL");
137 
138 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
139 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
140 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
141 
142 module_param_array(index, int, NULL, 0444);
143 MODULE_PARM_DESC(index, "Index value for "NAME_ALLCAPS".");
144 module_param_array(id, charp, NULL, 0444);
145 MODULE_PARM_DESC(id, "ID string for "NAME_ALLCAPS".");
146 module_param_array(enable, bool, NULL, 0444);
147 MODULE_PARM_DESC(enable, "Enable "NAME_ALLCAPS".");
148 
149 static int snd_usx2y_card_used[SNDRV_CARDS];
150 
151 static void snd_usx2y_card_private_free(struct snd_card *card);
152 static void usx2y_unlinkseq(struct snd_usx2y_async_seq *s);
153 
154 /*
155  * pipe 4 is used for switching the lamps, setting samplerate, volumes ....
156  */
157 static void i_usx2y_out04_int(struct urb *urb)
158 {
159 #ifdef CONFIG_SND_DEBUG
160         if (urb->status) {
161                 int i;
162                 struct usx2ydev *usx2y = urb->context;
163 
164                 for (i = 0; i < 10 && usx2y->as04.urb[i] != urb; i++)
165                         ;
166                 snd_printdd("%s urb %i status=%i\n", __func__, i, urb->status);
167         }
168 #endif
169 }
170 
171 static void i_usx2y_in04_int(struct urb *urb)
172 {
173         int                     err = 0;
174         struct usx2ydev         *usx2y = urb->context;
175         struct us428ctls_sharedmem      *us428ctls = usx2y->us428ctls_sharedmem;
176         struct us428_p4out *p4out;
177         int i, j, n, diff, send;
178 
179         usx2y->in04_int_calls++;
180 
181         if (urb->status) {
182                 snd_printdd("Interrupt Pipe 4 came back with status=%i\n", urb->status);
183                 return;
184         }
185 
186         //      printk("%i:0x%02X ", 8, (int)((unsigned char*)usx2y->in04_buf)[8]); Master volume shows 0 here if fader is at max during boot ?!?
187         if (us428ctls) {
188                 diff = -1;
189                 if (us428ctls->ctl_snapshot_last == -2) {
190                         diff = 0;
191                         memcpy(usx2y->in04_last, usx2y->in04_buf, sizeof(usx2y->in04_last));
192                         us428ctls->ctl_snapshot_last = -1;
193                 } else {
194                         for (i = 0; i < 21; i++) {
195                                 if (usx2y->in04_last[i] != ((char *)usx2y->in04_buf)[i]) {
196                                         if (diff < 0)
197                                                 diff = i;
198                                         usx2y->in04_last[i] = ((char *)usx2y->in04_buf)[i];
199                                 }
200                         }
201                 }
202                 if (diff >= 0) {
203                         n = us428ctls->ctl_snapshot_last + 1;
204                         if (n >= N_US428_CTL_BUFS || n < 0)
205                                 n = 0;
206                         memcpy(us428ctls->ctl_snapshot + n, usx2y->in04_buf, sizeof(us428ctls->ctl_snapshot[0]));
207                         us428ctls->ctl_snapshot_differs_at[n] = diff;
208                         us428ctls->ctl_snapshot_last = n;
209                         wake_up(&usx2y->us428ctls_wait_queue_head);
210                 }
211         }
212 
213         if (usx2y->us04) {
214                 if (!usx2y->us04->submitted) {
215                         do {
216                                 err = usb_submit_urb(usx2y->us04->urb[usx2y->us04->submitted++], GFP_ATOMIC);
217                         } while (!err && usx2y->us04->submitted < usx2y->us04->len);
218                 }
219         } else {
220                 if (us428ctls && us428ctls->p4out_last >= 0 && us428ctls->p4out_last < N_US428_P4OUT_BUFS) {
221                         if (us428ctls->p4out_last != us428ctls->p4out_sent) {
222                                 send = us428ctls->p4out_sent + 1;
223                                 if (send >= N_US428_P4OUT_BUFS)
224                                         send = 0;
225                                 for (j = 0; j < URBS_ASYNC_SEQ && !err; ++j) {
226                                         if (!usx2y->as04.urb[j]->status) {
227                                                 p4out = us428ctls->p4out + send;        // FIXME if more than 1 p4out is new, 1 gets lost.
228                                                 usb_fill_bulk_urb(usx2y->as04.urb[j], usx2y->dev,
229                                                                   usb_sndbulkpipe(usx2y->dev, 0x04), &p4out->val.vol,
230                                                                   p4out->type == ELT_LIGHT ? sizeof(struct us428_lights) : 5,
231                                                                   i_usx2y_out04_int, usx2y);
232                                                 err = usb_submit_urb(usx2y->as04.urb[j], GFP_ATOMIC);
233                                                 us428ctls->p4out_sent = send;
234                                                 break;
235                                         }
236                                 }
237                         }
238                 }
239         }
240 
241         if (err)
242                 snd_printk(KERN_ERR "in04_int() usb_submit_urb err=%i\n", err);
243 
244         urb->dev = usx2y->dev;
245         usb_submit_urb(urb, GFP_ATOMIC);
246 }
247 
248 /*
249  * Prepare some urbs
250  */
251 int usx2y_async_seq04_init(struct usx2ydev *usx2y)
252 {
253         int     err = 0, i;
254 
255         if (WARN_ON(usx2y->as04.buffer))
256                 return -EBUSY;
257 
258         usx2y->as04.buffer = kmalloc_array(URBS_ASYNC_SEQ,
259                                            URB_DATA_LEN_ASYNC_SEQ, GFP_KERNEL);
260         if (!usx2y->as04.buffer) {
261                 err = -ENOMEM;
262         } else {
263                 for (i = 0; i < URBS_ASYNC_SEQ; ++i) {
264                         usx2y->as04.urb[i] = usb_alloc_urb(0, GFP_KERNEL);
265                         if (!usx2y->as04.urb[i]) {
266                                 err = -ENOMEM;
267                                 break;
268                         }
269                         usb_fill_bulk_urb(usx2y->as04.urb[i], usx2y->dev,
270                                           usb_sndbulkpipe(usx2y->dev, 0x04),
271                                           usx2y->as04.buffer + URB_DATA_LEN_ASYNC_SEQ * i, 0,
272                                           i_usx2y_out04_int, usx2y);
273                         err = usb_urb_ep_type_check(usx2y->as04.urb[i]);
274                         if (err < 0)
275                                 break;
276                 }
277         }
278         if (err)
279                 usx2y_unlinkseq(&usx2y->as04);
280         return err;
281 }
282 
283 int usx2y_in04_init(struct usx2ydev *usx2y)
284 {
285         int err;
286 
287         if (WARN_ON(usx2y->in04_urb))
288                 return -EBUSY;
289 
290         usx2y->in04_urb = usb_alloc_urb(0, GFP_KERNEL);
291         if (!usx2y->in04_urb) {
292                 err = -ENOMEM;
293                 goto error;
294         }
295 
296         usx2y->in04_buf = kmalloc(21, GFP_KERNEL);
297         if (!usx2y->in04_buf) {
298                 err = -ENOMEM;
299                 goto error;
300         }
301 
302         init_waitqueue_head(&usx2y->in04_wait_queue);
303         usb_fill_int_urb(usx2y->in04_urb, usx2y->dev, usb_rcvintpipe(usx2y->dev, 0x4),
304                          usx2y->in04_buf, 21,
305                          i_usx2y_in04_int, usx2y,
306                          10);
307         if (usb_urb_ep_type_check(usx2y->in04_urb)) {
308                 err = -EINVAL;
309                 goto error;
310         }
311         return usb_submit_urb(usx2y->in04_urb, GFP_KERNEL);
312 
313  error:
314         kfree(usx2y->in04_buf);
315         usb_free_urb(usx2y->in04_urb);
316         usx2y->in04_buf = NULL;
317         usx2y->in04_urb = NULL;
318         return err;
319 }
320 
321 static void usx2y_unlinkseq(struct snd_usx2y_async_seq *s)
322 {
323         int     i;
324 
325         for (i = 0; i < URBS_ASYNC_SEQ; ++i) {
326                 if (!s->urb[i])
327                         continue;
328                 usb_kill_urb(s->urb[i]);
329                 usb_free_urb(s->urb[i]);
330                 s->urb[i] = NULL;
331         }
332         kfree(s->buffer);
333         s->buffer = NULL;
334 }
335 
336 static const struct usb_device_id snd_usx2y_usb_id_table[] = {
337         {
338                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
339                 .idVendor =     0x1604,
340                 .idProduct =    USB_ID_US428
341         },
342         {
343                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
344                 .idVendor =     0x1604,
345                 .idProduct =    USB_ID_US122
346         },
347         {
348                 .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
349                 .idVendor =     0x1604,
350                 .idProduct =    USB_ID_US224
351         },
352         { /* terminator */ }
353 };
354 MODULE_DEVICE_TABLE(usb, snd_usx2y_usb_id_table);
355 
356 static int usx2y_create_card(struct usb_device *device,
357                              struct usb_interface *intf,
358                              struct snd_card **cardp)
359 {
360         int             dev;
361         struct snd_card *card;
362         int err;
363 
364         for (dev = 0; dev < SNDRV_CARDS; ++dev)
365                 if (enable[dev] && !snd_usx2y_card_used[dev])
366                         break;
367         if (dev >= SNDRV_CARDS)
368                 return -ENODEV;
369         err = snd_card_new(&intf->dev, index[dev], id[dev], THIS_MODULE,
370                            sizeof(struct usx2ydev), &card);
371         if (err < 0)
372                 return err;
373         snd_usx2y_card_used[usx2y(card)->card_index = dev] = 1;
374         card->private_free = snd_usx2y_card_private_free;
375         usx2y(card)->dev = device;
376         init_waitqueue_head(&usx2y(card)->prepare_wait_queue);
377         init_waitqueue_head(&usx2y(card)->us428ctls_wait_queue_head);
378         mutex_init(&usx2y(card)->pcm_mutex);
379         INIT_LIST_HEAD(&usx2y(card)->midi_list);
380         strcpy(card->driver, "USB "NAME_ALLCAPS"");
381         sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
382         sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
383                 card->shortname,
384                 le16_to_cpu(device->descriptor.idVendor),
385                 le16_to_cpu(device->descriptor.idProduct),
386                 0,//us428(card)->usbmidi.ifnum,
387                 usx2y(card)->dev->bus->busnum, usx2y(card)->dev->devnum);
388         *cardp = card;
389         return 0;
390 }
391 
392 static void snd_usx2y_card_private_free(struct snd_card *card)
393 {
394         struct usx2ydev *usx2y = usx2y(card);
395 
396         kfree(usx2y->in04_buf);
397         usb_free_urb(usx2y->in04_urb);
398         if (usx2y->us428ctls_sharedmem)
399                 free_pages_exact(usx2y->us428ctls_sharedmem,
400                                  US428_SHAREDMEM_PAGES);
401         if (usx2y->card_index >= 0 && usx2y->card_index < SNDRV_CARDS)
402                 snd_usx2y_card_used[usx2y->card_index] = 0;
403 }
404 
405 static void snd_usx2y_disconnect(struct usb_interface *intf)
406 {
407         struct snd_card *card;
408         struct usx2ydev *usx2y;
409         struct list_head *p;
410 
411         card = usb_get_intfdata(intf);
412         if (!card)
413                 return;
414         usx2y = usx2y(card);
415         usx2y->chip_status = USX2Y_STAT_CHIP_HUP;
416         usx2y_unlinkseq(&usx2y->as04);
417         usb_kill_urb(usx2y->in04_urb);
418         snd_card_disconnect(card);
419 
420         /* release the midi resources */
421         list_for_each(p, &usx2y->midi_list) {
422                 snd_usbmidi_disconnect(p);
423         }
424         if (usx2y->us428ctls_sharedmem)
425                 wake_up(&usx2y->us428ctls_wait_queue_head);
426         snd_card_free(card);
427 }
428 
429 static int snd_usx2y_probe(struct usb_interface *intf,
430                            const struct usb_device_id *id)
431 {
432         struct usb_device *device = interface_to_usbdev(intf);
433         struct snd_card *card;
434         int err;
435 
436         if (le16_to_cpu(device->descriptor.idVendor) != 0x1604 ||
437             (le16_to_cpu(device->descriptor.idProduct) != USB_ID_US122 &&
438              le16_to_cpu(device->descriptor.idProduct) != USB_ID_US224 &&
439              le16_to_cpu(device->descriptor.idProduct) != USB_ID_US428))
440                 return -EINVAL;
441 
442         err = usx2y_create_card(device, intf, &card);
443         if (err < 0)
444                 return err;
445         err = usx2y_hwdep_new(card, device);
446         if (err < 0)
447                 goto error;
448         err = snd_card_register(card);
449         if (err < 0)
450                 goto error;
451 
452         dev_set_drvdata(&intf->dev, card);
453         return 0;
454 
455  error:
456         snd_card_free(card);
457         return err;
458 }
459 
460 static struct usb_driver snd_usx2y_usb_driver = {
461         .name =         "snd-usb-usx2y",
462         .probe =        snd_usx2y_probe,
463         .disconnect =   snd_usx2y_disconnect,
464         .id_table =     snd_usx2y_usb_id_table,
465 };
466 module_usb_driver(snd_usx2y_usb_driver);
467 

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