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Merge branch 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ieee1394 / video1394.c
blob4e3bd62c458df809c35d637442e3ac7c89eeddf6
1 /*
2 * video1394.c - video driver for OHCI 1394 boards
3 * Copyright (C)1999,2000 Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>
4 * Peter Schlaile <udbz@rz.uni-karlsruhe.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 * NOTES:
21 *
22 * ioctl return codes:
23 * EFAULT is only for invalid address for the argp
24 * EINVAL for out of range values
25 * EBUSY when trying to use an already used resource
26 * ESRCH when trying to free/stop a not used resource
27 * EAGAIN for resource allocation failure that could perhaps succeed later
28 * ENOTTY for unsupported ioctl request
29 *
30 */
31 #include <linux/config.h>
32 #include <linux/kernel.h>
33 #include <linux/list.h>
34 #include <linux/slab.h>
35 #include <linux/interrupt.h>
36 #include <linux/wait.h>
37 #include <linux/errno.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/pci.h>
41 #include <linux/fs.h>
42 #include <linux/poll.h>
43 #include <linux/smp_lock.h>
44 #include <linux/delay.h>
45 #include <linux/bitops.h>
46 #include <linux/types.h>
47 #include <linux/vmalloc.h>
48 #include <linux/timex.h>
49 #include <linux/mm.h>
50 #include <linux/compat.h>
51 #include <linux/cdev.h>
52
53 #include "ieee1394.h"
54 #include "ieee1394_types.h"
55 #include "hosts.h"
56 #include "ieee1394_core.h"
57 #include "highlevel.h"
58 #include "video1394.h"
59 #include "nodemgr.h"
60 #include "dma.h"
61
62 #include "ohci1394.h"
63
64 #define ISO_CHANNELS 64
65
66 struct it_dma_prg {
67 struct dma_cmd begin;
68 quadlet_t data[4];
69 struct dma_cmd end;
70 quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
71 };
72
73 struct dma_iso_ctx {
74 struct ti_ohci *ohci;
75 int type; /* OHCI_ISO_TRANSMIT or OHCI_ISO_RECEIVE */
76 struct ohci1394_iso_tasklet iso_tasklet;
77 int channel;
78 int ctx;
79 int last_buffer;
80 int * next_buffer; /* For ISO Transmit of video packets
81 to write the correct SYT field
82 into the next block */
83 unsigned int num_desc;
84 unsigned int buf_size;
85 unsigned int frame_size;
86 unsigned int packet_size;
87 unsigned int left_size;
88 unsigned int nb_cmd;
89
90 struct dma_region dma;
91
92 struct dma_prog_region *prg_reg;
93
94 struct dma_cmd **ir_prg;
95 struct it_dma_prg **it_prg;
96
97 unsigned int *buffer_status;
98 unsigned int *buffer_prg_assignment;
99 struct timeval *buffer_time; /* time when the buffer was received */
100 unsigned int *last_used_cmd; /* For ISO Transmit with
101 variable sized packets only ! */
102 int ctrlClear;
103 int ctrlSet;
104 int cmdPtr;
105 int ctxMatch;
106 wait_queue_head_t waitq;
107 spinlock_t lock;
108 unsigned int syt_offset;
109 int flags;
110
111 struct list_head link;
112 };
113
114
115 struct file_ctx {
116 struct ti_ohci *ohci;
117 struct list_head context_list;
118 struct dma_iso_ctx *current_ctx;
119 };
120
121 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
122 #define VIDEO1394_DEBUG
123 #endif
124
125 #ifdef DBGMSG
126 #undef DBGMSG
127 #endif
128
129 #ifdef VIDEO1394_DEBUG
130 #define DBGMSG(card, fmt, args...) \
131 printk(KERN_INFO "video1394_%d: " fmt "\n" , card , ## args)
132 #else
133 #define DBGMSG(card, fmt, args...)
134 #endif
135
136 /* print general (card independent) information */
137 #define PRINT_G(level, fmt, args...) \
138 printk(level "video1394: " fmt "\n" , ## args)
139
140 /* print card specific information */
141 #define PRINT(level, card, fmt, args...) \
142 printk(level "video1394_%d: " fmt "\n" , card , ## args)
143
144 static void wakeup_dma_ir_ctx(unsigned long l);
145 static void wakeup_dma_it_ctx(unsigned long l);
146
147 static struct hpsb_highlevel video1394_highlevel;
148
149 static int free_dma_iso_ctx(struct dma_iso_ctx *d)
150 {
151 int i;
152
153 DBGMSG(d->ohci->host->id, "Freeing dma_iso_ctx %d", d->ctx);
154
155 ohci1394_stop_context(d->ohci, d->ctrlClear, NULL);
156 if (d->iso_tasklet.link.next != NULL)
157 ohci1394_unregister_iso_tasklet(d->ohci, &d->iso_tasklet);
158
159 dma_region_free(&d->dma);
160
161 if (d->prg_reg) {
162 for (i = 0; i < d->num_desc; i++)
163 dma_prog_region_free(&d->prg_reg[i]);
164 kfree(d->prg_reg);
165 }
166
167 kfree(d->ir_prg);
168 kfree(d->it_prg);
169 kfree(d->buffer_status);
170 kfree(d->buffer_prg_assignment);
171 kfree(d->buffer_time);
172 kfree(d->last_used_cmd);
173 kfree(d->next_buffer);
174 list_del(&d->link);
175 kfree(d);
176
177 return 0;
178 }
179
180 static struct dma_iso_ctx *
181 alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int num_desc,
182 int buf_size, int channel, unsigned int packet_size)
183 {
184 struct dma_iso_ctx *d;
185 int i;
186
187 d = kzalloc(sizeof(*d), GFP_KERNEL);
188 if (!d) {
189 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma_iso_ctx");
190 return NULL;
191 }
192
193 d->ohci = ohci;
194 d->type = type;
195 d->channel = channel;
196 d->num_desc = num_desc;
197 d->frame_size = buf_size;
198 d->buf_size = PAGE_ALIGN(buf_size);
199 d->last_buffer = -1;
200 INIT_LIST_HEAD(&d->link);
201 init_waitqueue_head(&d->waitq);
202
203 /* Init the regions for easy cleanup */
204 dma_region_init(&d->dma);
205
206 if (dma_region_alloc(&d->dma, (d->num_desc - 1) * d->buf_size, ohci->dev,
207 PCI_DMA_BIDIRECTIONAL)) {
208 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma buffer");
209 free_dma_iso_ctx(d);
210 return NULL;
211 }
212
213 if (type == OHCI_ISO_RECEIVE)
214 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
215 wakeup_dma_ir_ctx,
216 (unsigned long) d);
217 else
218 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
219 wakeup_dma_it_ctx,
220 (unsigned long) d);
221
222 if (ohci1394_register_iso_tasklet(ohci, &d->iso_tasklet) < 0) {
223 PRINT(KERN_ERR, ohci->host->id, "no free iso %s contexts",
224 type == OHCI_ISO_RECEIVE ? "receive" : "transmit");
225 free_dma_iso_ctx(d);
226 return NULL;
227 }
228 d->ctx = d->iso_tasklet.context;
229
230 d->prg_reg = kmalloc(d->num_desc * sizeof(*d->prg_reg), GFP_KERNEL);
231 if (!d->prg_reg) {
232 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate ir prg regs");
233 free_dma_iso_ctx(d);
234 return NULL;
235 }
236 /* Makes for easier cleanup */
237 for (i = 0; i < d->num_desc; i++)
238 dma_prog_region_init(&d->prg_reg[i]);
239
240 if (type == OHCI_ISO_RECEIVE) {
241 d->ctrlSet = OHCI1394_IsoRcvContextControlSet+32*d->ctx;
242 d->ctrlClear = OHCI1394_IsoRcvContextControlClear+32*d->ctx;
243 d->cmdPtr = OHCI1394_IsoRcvCommandPtr+32*d->ctx;
244 d->ctxMatch = OHCI1394_IsoRcvContextMatch+32*d->ctx;
245
246 d->ir_prg = kzalloc(d->num_desc * sizeof(*d->ir_prg),
247 GFP_KERNEL);
248
249 if (!d->ir_prg) {
250 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
251 free_dma_iso_ctx(d);
252 return NULL;
253 }
254
255 d->nb_cmd = d->buf_size / PAGE_SIZE + 1;
256 d->left_size = (d->frame_size % PAGE_SIZE) ?
257 d->frame_size % PAGE_SIZE : PAGE_SIZE;
258
259 for (i = 0;i < d->num_desc; i++) {
260 if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
261 sizeof(struct dma_cmd), ohci->dev)) {
262 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
263 free_dma_iso_ctx(d);
264 return NULL;
265 }
266 d->ir_prg[i] = (struct dma_cmd *)d->prg_reg[i].kvirt;
267 }
268
269 } else { /* OHCI_ISO_TRANSMIT */
270 d->ctrlSet = OHCI1394_IsoXmitContextControlSet+16*d->ctx;
271 d->ctrlClear = OHCI1394_IsoXmitContextControlClear+16*d->ctx;
272 d->cmdPtr = OHCI1394_IsoXmitCommandPtr+16*d->ctx;
273
274 d->it_prg = kzalloc(d->num_desc * sizeof(*d->it_prg),
275 GFP_KERNEL);
276
277 if (!d->it_prg) {
278 PRINT(KERN_ERR, ohci->host->id,
279 "Failed to allocate dma it prg");
280 free_dma_iso_ctx(d);
281 return NULL;
282 }
283
284 d->packet_size = packet_size;
285
286 if (PAGE_SIZE % packet_size || packet_size>4096) {
287 PRINT(KERN_ERR, ohci->host->id,
288 "Packet size %d (page_size: %ld) "
289 "not yet supported\n",
290 packet_size, PAGE_SIZE);
291 free_dma_iso_ctx(d);
292 return NULL;
293 }
294
295 d->nb_cmd = d->frame_size / d->packet_size;
296 if (d->frame_size % d->packet_size) {
297 d->nb_cmd++;
298 d->left_size = d->frame_size % d->packet_size;
299 } else
300 d->left_size = d->packet_size;
301
302 for (i = 0; i < d->num_desc; i++) {
303 if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
304 sizeof(struct it_dma_prg), ohci->dev)) {
305 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma it prg");
306 free_dma_iso_ctx(d);
307 return NULL;
308 }
309 d->it_prg[i] = (struct it_dma_prg *)d->prg_reg[i].kvirt;
310 }
311 }
312
313 d->buffer_status =
314 kzalloc(d->num_desc * sizeof(*d->buffer_status), GFP_KERNEL);
315 d->buffer_prg_assignment =
316 kzalloc(d->num_desc * sizeof(*d->buffer_prg_assignment), GFP_KERNEL);
317 d->buffer_time =
318 kzalloc(d->num_desc * sizeof(*d->buffer_time), GFP_KERNEL);
319 d->last_used_cmd =
320 kzalloc(d->num_desc * sizeof(*d->last_used_cmd), GFP_KERNEL);
321 d->next_buffer =
322 kzalloc(d->num_desc * sizeof(*d->next_buffer), GFP_KERNEL);
323
324 if (!d->buffer_status || !d->buffer_prg_assignment || !d->buffer_time ||
325 !d->last_used_cmd || !d->next_buffer) {
326 PRINT(KERN_ERR, ohci->host->id,
327 "Failed to allocate dma_iso_ctx member");
328 free_dma_iso_ctx(d);
329 return NULL;
330 }
331
332 spin_lock_init(&d->lock);
333
334 PRINT(KERN_INFO, ohci->host->id, "Iso %s DMA: %d buffers "
335 "of size %d allocated for a frame size %d, each with %d prgs",
336 (type == OHCI_ISO_RECEIVE) ? "receive" : "transmit",
337 d->num_desc - 1, d->buf_size, d->frame_size, d->nb_cmd);
338
339 return d;
340 }
341
342 static void reset_ir_status(struct dma_iso_ctx *d, int n)
343 {
344 int i;
345 d->ir_prg[n][0].status = cpu_to_le32(4);
346 d->ir_prg[n][1].status = cpu_to_le32(PAGE_SIZE-4);
347 for (i = 2; i < d->nb_cmd - 1; i++)
348 d->ir_prg[n][i].status = cpu_to_le32(PAGE_SIZE);
349 d->ir_prg[n][i].status = cpu_to_le32(d->left_size);
350 }
351
352 static void reprogram_dma_ir_prg(struct dma_iso_ctx *d, int n, int buffer, int flags)
353 {
354 struct dma_cmd *ir_prg = d->ir_prg[n];
355 unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
356 int i;
357
358 d->buffer_prg_assignment[n] = buffer;
359
360 ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
361 (unsigned long)d->dma.kvirt));
362 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
363 (buf + 4) - (unsigned long)d->dma.kvirt));
364
365 for (i=2;i<d->nb_cmd-1;i++) {
366 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
367 (buf+(i-1)*PAGE_SIZE) -
368 (unsigned long)d->dma.kvirt));
369 }
370
371 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
372 DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
373 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
374 (buf+(i-1)*PAGE_SIZE) - (unsigned long)d->dma.kvirt));
375 }
376
377 static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
378 {
379 struct dma_cmd *ir_prg = d->ir_prg[n];
380 struct dma_prog_region *ir_reg = &d->prg_reg[n];
381 unsigned long buf = (unsigned long)d->dma.kvirt;
382 int i;
383
384 /* the first descriptor will read only 4 bytes */
385 ir_prg[0].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
386 DMA_CTL_BRANCH | 4);
387
388 /* set the sync flag */
389 if (flags & VIDEO1394_SYNC_FRAMES)
390 ir_prg[0].control |= cpu_to_le32(DMA_CTL_WAIT);
391
392 ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
393 (unsigned long)d->dma.kvirt));
394 ir_prg[0].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
395 1 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
396
397 /* If there is *not* only one DMA page per frame (hence, d->nb_cmd==2) */
398 if (d->nb_cmd > 2) {
399 /* The second descriptor will read PAGE_SIZE-4 bytes */
400 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
401 DMA_CTL_BRANCH | (PAGE_SIZE-4));
402 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf + 4) -
403 (unsigned long)d->dma.kvirt));
404 ir_prg[1].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
405 2 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
406
407 for (i = 2; i < d->nb_cmd - 1; i++) {
408 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
409 DMA_CTL_BRANCH | PAGE_SIZE);
410 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
411 (buf+(i-1)*PAGE_SIZE) -
412 (unsigned long)d->dma.kvirt));
413
414 ir_prg[i].branchAddress =
415 cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
416 (i + 1) * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
417 }
418
419 /* The last descriptor will generate an interrupt */
420 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
421 DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
422 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
423 (buf+(i-1)*PAGE_SIZE) -
424 (unsigned long)d->dma.kvirt));
425 } else {
426 /* Only one DMA page is used. Read d->left_size immediately and */
427 /* generate an interrupt as this is also the last page. */
428 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
429 DMA_CTL_IRQ | DMA_CTL_BRANCH | (d->left_size-4));
430 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
431 (buf + 4) - (unsigned long)d->dma.kvirt));
432 }
433 }
434
435 static void initialize_dma_ir_ctx(struct dma_iso_ctx *d, int tag, int flags)
436 {
437 struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
438 int i;
439
440 d->flags = flags;
441
442 ohci1394_stop_context(ohci, d->ctrlClear, NULL);
443
444 for (i=0;i<d->num_desc;i++) {
445 initialize_dma_ir_prg(d, i, flags);
446 reset_ir_status(d, i);
447 }
448
449 /* reset the ctrl register */
450 reg_write(ohci, d->ctrlClear, 0xf0000000);
451
452 /* Set bufferFill */
453 reg_write(ohci, d->ctrlSet, 0x80000000);
454
455 /* Set isoch header */
456 if (flags & VIDEO1394_INCLUDE_ISO_HEADERS)
457 reg_write(ohci, d->ctrlSet, 0x40000000);
458
459 /* Set the context match register to match on all tags,
460 sync for sync tag, and listen to d->channel */
461 reg_write(ohci, d->ctxMatch, 0xf0000000|((tag&0xf)<<8)|d->channel);
462
463 /* Set up isoRecvIntMask to generate interrupts */
464 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1<<d->ctx);
465 }
466
467 /* find which context is listening to this channel */
468 static struct dma_iso_ctx *
469 find_ctx(struct list_head *list, int type, int channel)
470 {
471 struct dma_iso_ctx *ctx;
472
473 list_for_each_entry(ctx, list, link) {
474 if (ctx->type == type && ctx->channel == channel)
475 return ctx;
476 }
477
478 return NULL;
479 }
480
481 static void wakeup_dma_ir_ctx(unsigned long l)
482 {
483 struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
484 int i;
485
486 spin_lock(&d->lock);
487
488 for (i = 0; i < d->num_desc; i++) {
489 if (d->ir_prg[i][d->nb_cmd-1].status & cpu_to_le32(0xFFFF0000)) {
490 reset_ir_status(d, i);
491 d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
492 do_gettimeofday(&d->buffer_time[d->buffer_prg_assignment[i]]);
493 }
494 }
495
496 spin_unlock(&d->lock);
497
498 if (waitqueue_active(&d->waitq))
499 wake_up_interruptible(&d->waitq);
500 }
501
502 static inline void put_timestamp(struct ti_ohci *ohci, struct dma_iso_ctx * d,
503 int n)
504 {
505 unsigned char* buf = d->dma.kvirt + n * d->buf_size;
506 u32 cycleTimer;
507 u32 timeStamp;
508
509 if (n == -1) {
510 return;
511 }
512
513 cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
514
515 timeStamp = ((cycleTimer & 0x0fff) + d->syt_offset); /* 11059 = 450 us */
516 timeStamp = (timeStamp % 3072 + ((timeStamp / 3072) << 12)
517 + (cycleTimer & 0xf000)) & 0xffff;
518
519 buf[6] = timeStamp >> 8;
520 buf[7] = timeStamp & 0xff;
521
522 /* if first packet is empty packet, then put timestamp into the next full one too */
523 if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
524 buf += d->packet_size;
525 buf[6] = timeStamp >> 8;
526 buf[7] = timeStamp & 0xff;
527 }
528
529 /* do the next buffer frame too in case of irq latency */
530 n = d->next_buffer[n];
531 if (n == -1) {
532 return;
533 }
534 buf = d->dma.kvirt + n * d->buf_size;
535
536 timeStamp += (d->last_used_cmd[n] << 12) & 0xffff;
537
538 buf[6] = timeStamp >> 8;
539 buf[7] = timeStamp & 0xff;
540
541 /* if first packet is empty packet, then put timestamp into the next full one too */
542 if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
543 buf += d->packet_size;
544 buf[6] = timeStamp >> 8;
545 buf[7] = timeStamp & 0xff;
546 }
547
548 #if 0
549 printk("curr: %d, next: %d, cycleTimer: %08x timeStamp: %08x\n",
550 curr, n, cycleTimer, timeStamp);
551 #endif
552 }
553
554 static void wakeup_dma_it_ctx(unsigned long l)
555 {
556 struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
557 struct ti_ohci *ohci = d->ohci;
558 int i;
559
560 spin_lock(&d->lock);
561
562 for (i = 0; i < d->num_desc; i++) {
563 if (d->it_prg[i][d->last_used_cmd[i]].end.status &
564 cpu_to_le32(0xFFFF0000)) {
565 int next = d->next_buffer[i];
566 put_timestamp(ohci, d, next);
567 d->it_prg[i][d->last_used_cmd[i]].end.status = 0;
568 d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
569 }
570 }
571
572 spin_unlock(&d->lock);
573
574 if (waitqueue_active(&d->waitq))
575 wake_up_interruptible(&d->waitq);
576 }
577
578 static void reprogram_dma_it_prg(struct dma_iso_ctx *d, int n, int buffer)
579 {
580 struct it_dma_prg *it_prg = d->it_prg[n];
581 unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
582 int i;
583
584 d->buffer_prg_assignment[n] = buffer;
585 for (i=0;i<d->nb_cmd;i++) {
586 it_prg[i].end.address =
587 cpu_to_le32(dma_region_offset_to_bus(&d->dma,
588 (buf+i*d->packet_size) - (unsigned long)d->dma.kvirt));
589 }
590 }
591
592 static void initialize_dma_it_prg(struct dma_iso_ctx *d, int n, int sync_tag)
593 {
594 struct it_dma_prg *it_prg = d->it_prg[n];
595 struct dma_prog_region *it_reg = &d->prg_reg[n];
596 unsigned long buf = (unsigned long)d->dma.kvirt;
597 int i;
598 d->last_used_cmd[n] = d->nb_cmd - 1;
599 for (i=0;i<d->nb_cmd;i++) {
600
601 it_prg[i].begin.control = cpu_to_le32(DMA_CTL_OUTPUT_MORE |
602 DMA_CTL_IMMEDIATE | 8) ;
603 it_prg[i].begin.address = 0;
604
605 it_prg[i].begin.status = 0;
606
607 it_prg[i].data[0] = cpu_to_le32(
608 (IEEE1394_SPEED_100 << 16)
609 | (/* tag */ 1 << 14)
610 | (d->channel << 8)
611 | (TCODE_ISO_DATA << 4));
612 if (i==0) it_prg[i].data[0] |= cpu_to_le32(sync_tag);
613 it_prg[i].data[1] = cpu_to_le32(d->packet_size << 16);
614 it_prg[i].data[2] = 0;
615 it_prg[i].data[3] = 0;
616
617 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST |
618 DMA_CTL_BRANCH);
619 it_prg[i].end.address =
620 cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf+i*d->packet_size) -
621 (unsigned long)d->dma.kvirt));
622
623 if (i<d->nb_cmd-1) {
624 it_prg[i].end.control |= cpu_to_le32(d->packet_size);
625 it_prg[i].begin.branchAddress =
626 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
627 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
628 it_prg[i].end.branchAddress =
629 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
630 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
631 } else {
632 /* the last prg generates an interrupt */
633 it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
634 DMA_CTL_IRQ | d->left_size);
635 /* the last prg doesn't branch */
636 it_prg[i].begin.branchAddress = 0;
637 it_prg[i].end.branchAddress = 0;
638 }
639 it_prg[i].end.status = 0;
640 }
641 }
642
643 static void initialize_dma_it_prg_var_packet_queue(
644 struct dma_iso_ctx *d, int n, unsigned int * packet_sizes,
645 struct ti_ohci *ohci)
646 {
647 struct it_dma_prg *it_prg = d->it_prg[n];
648 struct dma_prog_region *it_reg = &d->prg_reg[n];
649 int i;
650
651 #if 0
652 if (n != -1) {
653 put_timestamp(ohci, d, n);
654 }
655 #endif
656 d->last_used_cmd[n] = d->nb_cmd - 1;
657
658 for (i = 0; i < d->nb_cmd; i++) {
659 unsigned int size;
660 if (packet_sizes[i] > d->packet_size) {
661 size = d->packet_size;
662 } else {
663 size = packet_sizes[i];
664 }
665 it_prg[i].data[1] = cpu_to_le32(size << 16);
666 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH);
667
668 if (i < d->nb_cmd-1 && packet_sizes[i+1] != 0) {
669 it_prg[i].end.control |= cpu_to_le32(size);
670 it_prg[i].begin.branchAddress =
671 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
672 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
673 it_prg[i].end.branchAddress =
674 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
675 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
676 } else {
677 /* the last prg generates an interrupt */
678 it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
679 DMA_CTL_IRQ | size);
680 /* the last prg doesn't branch */
681 it_prg[i].begin.branchAddress = 0;
682 it_prg[i].end.branchAddress = 0;
683 d->last_used_cmd[n] = i;
684 break;
685 }
686 }
687 }
688
689 static void initialize_dma_it_ctx(struct dma_iso_ctx *d, int sync_tag,
690 unsigned int syt_offset, int flags)
691 {
692 struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
693 int i;
694
695 d->flags = flags;
696 d->syt_offset = (syt_offset == 0 ? 11000 : syt_offset);
697
698 ohci1394_stop_context(ohci, d->ctrlClear, NULL);
699
700 for (i=0;i<d->num_desc;i++)
701 initialize_dma_it_prg(d, i, sync_tag);
702
703 /* Set up isoRecvIntMask to generate interrupts */
704 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1<<d->ctx);
705 }
706
707 static inline unsigned video1394_buffer_state(struct dma_iso_ctx *d,
708 unsigned int buffer)
709 {
710 unsigned long flags;
711 unsigned int ret;
712 spin_lock_irqsave(&d->lock, flags);
713 ret = d->buffer_status[buffer];
714 spin_unlock_irqrestore(&d->lock, flags);
715 return ret;
716 }
717
718 static int __video1394_ioctl(struct file *file,
719 unsigned int cmd, unsigned long arg)
720 {
721 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
722 struct ti_ohci *ohci = ctx->ohci;
723 unsigned long flags;
724 void __user *argp = (void __user *)arg;
725
726 switch(cmd)
727 {
728 case VIDEO1394_IOC_LISTEN_CHANNEL:
729 case VIDEO1394_IOC_TALK_CHANNEL:
730 {
731 struct video1394_mmap v;
732 u64 mask;
733 struct dma_iso_ctx *d;
734 int i;
735
736 if (copy_from_user(&v, argp, sizeof(v)))
737 return -EFAULT;
738
739 /* if channel < 0, find lowest available one */
740 if (v.channel < 0) {
741 mask = (u64)0x1;
742 for (i=0; ; i++) {
743 if (i == ISO_CHANNELS) {
744 PRINT(KERN_ERR, ohci->host->id,
745 "No free channel found");
746 return -EAGAIN;
747 }
748 if (!(ohci->ISO_channel_usage & mask)) {
749 v.channel = i;
750 PRINT(KERN_INFO, ohci->host->id, "Found free channel %d", i);
751 break;
752 }
753 mask = mask << 1;
754 }
755 } else if (v.channel >= ISO_CHANNELS) {
756 PRINT(KERN_ERR, ohci->host->id,
757 "Iso channel %d out of bounds", v.channel);
758 return -EINVAL;
759 } else {
760 mask = (u64)0x1<<v.channel;
761 }
762 PRINT(KERN_INFO, ohci->host->id, "mask: %08X%08X usage: %08X%08X\n",
763 (u32)(mask>>32),(u32)(mask&0xffffffff),
764 (u32)(ohci->ISO_channel_usage>>32),
765 (u32)(ohci->ISO_channel_usage&0xffffffff));
766 if (ohci->ISO_channel_usage & mask) {
767 PRINT(KERN_ERR, ohci->host->id,
768 "Channel %d is already taken", v.channel);
769 return -EBUSY;
770 }
771
772 if (v.buf_size == 0 || v.buf_size > VIDEO1394_MAX_SIZE) {
773 PRINT(KERN_ERR, ohci->host->id,
774 "Invalid %d length buffer requested",v.buf_size);
775 return -EINVAL;
776 }
777
778 if (v.nb_buffers == 0 || v.nb_buffers > VIDEO1394_MAX_SIZE) {
779 PRINT(KERN_ERR, ohci->host->id,
780 "Invalid %d buffers requested",v.nb_buffers);
781 return -EINVAL;
782 }
783
784 if (v.nb_buffers * v.buf_size > VIDEO1394_MAX_SIZE) {
785 PRINT(KERN_ERR, ohci->host->id,
786 "%d buffers of size %d bytes is too big",
787 v.nb_buffers, v.buf_size);
788 return -EINVAL;
789 }
790
791 if (cmd == VIDEO1394_IOC_LISTEN_CHANNEL) {
792 d = alloc_dma_iso_ctx(ohci, OHCI_ISO_RECEIVE,
793 v.nb_buffers + 1, v.buf_size,
794 v.channel, 0);
795
796 if (d == NULL) {
797 PRINT(KERN_ERR, ohci->host->id,
798 "Couldn't allocate ir context");
799 return -EAGAIN;
800 }
801 initialize_dma_ir_ctx(d, v.sync_tag, v.flags);
802
803 ctx->current_ctx = d;
804
805 v.buf_size = d->buf_size;
806 list_add_tail(&d->link, &ctx->context_list);
807
808 PRINT(KERN_INFO, ohci->host->id,
809 "iso context %d listen on channel %d",
810 d->ctx, v.channel);
811 }
812 else {
813 d = alloc_dma_iso_ctx(ohci, OHCI_ISO_TRANSMIT,
814 v.nb_buffers + 1, v.buf_size,
815 v.channel, v.packet_size);
816
817 if (d == NULL) {
818 PRINT(KERN_ERR, ohci->host->id,
819 "Couldn't allocate it context");
820 return -EAGAIN;
821 }
822 initialize_dma_it_ctx(d, v.sync_tag,
823 v.syt_offset, v.flags);
824
825 ctx->current_ctx = d;
826
827 v.buf_size = d->buf_size;
828
829 list_add_tail(&d->link, &ctx->context_list);
830
831 PRINT(KERN_INFO, ohci->host->id,
832 "Iso context %d talk on channel %d", d->ctx,
833 v.channel);
834 }
835
836 if (copy_to_user(argp, &v, sizeof(v))) {
837 /* FIXME : free allocated dma resources */
838 return -EFAULT;
839 }
840
841 ohci->ISO_channel_usage |= mask;
842
843 return 0;
844 }
845 case VIDEO1394_IOC_UNLISTEN_CHANNEL:
846 case VIDEO1394_IOC_UNTALK_CHANNEL:
847 {
848 int channel;
849 u64 mask;
850 struct dma_iso_ctx *d;
851
852 if (copy_from_user(&channel, argp, sizeof(int)))
853 return -EFAULT;
854
855 if (channel < 0 || channel >= ISO_CHANNELS) {
856 PRINT(KERN_ERR, ohci->host->id,
857 "Iso channel %d out of bound", channel);
858 return -EINVAL;
859 }
860 mask = (u64)0x1<<channel;
861 if (!(ohci->ISO_channel_usage & mask)) {
862 PRINT(KERN_ERR, ohci->host->id,
863 "Channel %d is not being used", channel);
864 return -ESRCH;
865 }
866
867 /* Mark this channel as unused */
868 ohci->ISO_channel_usage &= ~mask;
869
870 if (cmd == VIDEO1394_IOC_UNLISTEN_CHANNEL)
871 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, channel);
872 else
873 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, channel);
874
875 if (d == NULL) return -ESRCH;
876 PRINT(KERN_INFO, ohci->host->id, "Iso context %d "
877 "stop talking on channel %d", d->ctx, channel);
878 free_dma_iso_ctx(d);
879
880 return 0;
881 }
882 case VIDEO1394_IOC_LISTEN_QUEUE_BUFFER:
883 {
884 struct video1394_wait v;
885 struct dma_iso_ctx *d;
886 int next_prg;
887
888 if (copy_from_user(&v, argp, sizeof(v)))
889 return -EFAULT;
890
891 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
892 if (d == NULL) return -EFAULT;
893
894 if ((v.buffer<0) || (v.buffer>=d->num_desc - 1)) {
895 PRINT(KERN_ERR, ohci->host->id,
896 "Buffer %d out of range",v.buffer);
897 return -EINVAL;
898 }
899
900 spin_lock_irqsave(&d->lock,flags);
901
902 if (d->buffer_status[v.buffer]==VIDEO1394_BUFFER_QUEUED) {
903 PRINT(KERN_ERR, ohci->host->id,
904 "Buffer %d is already used",v.buffer);
905 spin_unlock_irqrestore(&d->lock,flags);
906 return -EBUSY;
907 }
908
909 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
910
911 next_prg = (d->last_buffer + 1) % d->num_desc;
912 if (d->last_buffer>=0)
913 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress =
914 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 0)
915 & 0xfffffff0) | 0x1);
916
917 d->last_buffer = next_prg;
918 reprogram_dma_ir_prg(d, d->last_buffer, v.buffer, d->flags);
919
920 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress = 0;
921
922 spin_unlock_irqrestore(&d->lock,flags);
923
924 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
925 {
926 DBGMSG(ohci->host->id, "Starting iso DMA ctx=%d",d->ctx);
927
928 /* Tell the controller where the first program is */
929 reg_write(ohci, d->cmdPtr,
930 dma_prog_region_offset_to_bus(&d->prg_reg[d->last_buffer], 0) | 0x1);
931
932 /* Run IR context */
933 reg_write(ohci, d->ctrlSet, 0x8000);
934 }
935 else {
936 /* Wake up dma context if necessary */
937 if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
938 PRINT(KERN_INFO, ohci->host->id,
939 "Waking up iso dma ctx=%d", d->ctx);
940 reg_write(ohci, d->ctrlSet, 0x1000);
941 }
942 }
943 return 0;
944
945 }
946 case VIDEO1394_IOC_LISTEN_WAIT_BUFFER:
947 case VIDEO1394_IOC_LISTEN_POLL_BUFFER:
948 {
949 struct video1394_wait v;
950 struct dma_iso_ctx *d;
951 int i = 0;
952
953 if (copy_from_user(&v, argp, sizeof(v)))
954 return -EFAULT;
955
956 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
957 if (d == NULL) return -EFAULT;
958
959 if ((v.buffer<0) || (v.buffer>d->num_desc - 1)) {
960 PRINT(KERN_ERR, ohci->host->id,
961 "Buffer %d out of range",v.buffer);
962 return -EINVAL;
963 }
964
965 /*
966 * I change the way it works so that it returns
967 * the last received frame.
968 */
969 spin_lock_irqsave(&d->lock, flags);
970 switch(d->buffer_status[v.buffer]) {
971 case VIDEO1394_BUFFER_READY:
972 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
973 break;
974 case VIDEO1394_BUFFER_QUEUED:
975 if (cmd == VIDEO1394_IOC_LISTEN_POLL_BUFFER) {
976 /* for polling, return error code EINTR */
977 spin_unlock_irqrestore(&d->lock, flags);
978 return -EINTR;
979 }
980
981 spin_unlock_irqrestore(&d->lock, flags);
982 wait_event_interruptible(d->waitq,
983 video1394_buffer_state(d, v.buffer) ==
984 VIDEO1394_BUFFER_READY);
985 if (signal_pending(current))
986 return -EINTR;
987 spin_lock_irqsave(&d->lock, flags);
988 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
989 break;
990 default:
991 PRINT(KERN_ERR, ohci->host->id,
992 "Buffer %d is not queued",v.buffer);
993 spin_unlock_irqrestore(&d->lock, flags);
994 return -ESRCH;
995 }
996
997 /* set time of buffer */
998 v.filltime = d->buffer_time[v.buffer];
999
1000 /*
1001 * Look ahead to see how many more buffers have been received
1002 */
1003 i=0;
1004 while (d->buffer_status[(v.buffer+1)%(d->num_desc - 1)]==
1005 VIDEO1394_BUFFER_READY) {
1006 v.buffer=(v.buffer+1)%(d->num_desc - 1);
1007 i++;
1008 }
1009 spin_unlock_irqrestore(&d->lock, flags);
1010
1011 v.buffer=i;
1012 if (copy_to_user(argp, &v, sizeof(v)))
1013 return -EFAULT;
1014
1015 return 0;
1016 }
1017 case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1018 {
1019 struct video1394_wait v;
1020 unsigned int *psizes = NULL;
1021 struct dma_iso_ctx *d;
1022 int next_prg;
1023
1024 if (copy_from_user(&v, argp, sizeof(v)))
1025 return -EFAULT;
1026
1027 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1028 if (d == NULL) return -EFAULT;
1029
1030 if ((v.buffer<0) || (v.buffer>=d->num_desc - 1)) {
1031 PRINT(KERN_ERR, ohci->host->id,
1032 "Buffer %d out of range",v.buffer);
1033 return -EINVAL;
1034 }
1035
1036 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1037 int buf_size = d->nb_cmd * sizeof(*psizes);
1038 struct video1394_queue_variable __user *p = argp;
1039 unsigned int __user *qv;
1040
1041 if (get_user(qv, &p->packet_sizes))
1042 return -EFAULT;
1043
1044 psizes = kmalloc(buf_size, GFP_KERNEL);
1045 if (!psizes)
1046 return -ENOMEM;
1047
1048 if (copy_from_user(psizes, qv, buf_size)) {
1049 kfree(psizes);
1050 return -EFAULT;
1051 }
1052 }
1053
1054 spin_lock_irqsave(&d->lock,flags);
1055
1056 /* last_buffer is last_prg */
1057 next_prg = (d->last_buffer + 1) % d->num_desc;
1058 if (d->buffer_status[v.buffer]!=VIDEO1394_BUFFER_FREE) {
1059 PRINT(KERN_ERR, ohci->host->id,
1060 "Buffer %d is already used",v.buffer);
1061 spin_unlock_irqrestore(&d->lock,flags);
1062 kfree(psizes);
1063 return -EBUSY;
1064 }
1065
1066 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1067 initialize_dma_it_prg_var_packet_queue(
1068 d, next_prg, psizes, ohci);
1069 }
1070
1071 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
1072
1073 if (d->last_buffer >= 0) {
1074 d->it_prg[d->last_buffer]
1075 [ d->last_used_cmd[d->last_buffer] ].end.branchAddress =
1076 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg],
1077 0) & 0xfffffff0) | 0x3);
1078
1079 d->it_prg[d->last_buffer]
1080 [ d->last_used_cmd[d->last_buffer] ].begin.branchAddress =
1081 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg],
1082 0) & 0xfffffff0) | 0x3);
1083 d->next_buffer[d->last_buffer] = (v.buffer + 1) % (d->num_desc - 1);
1084 }
1085 d->last_buffer = next_prg;
1086 reprogram_dma_it_prg(d, d->last_buffer, v.buffer);
1087 d->next_buffer[d->last_buffer] = -1;
1088
1089 d->it_prg[d->last_buffer][d->last_used_cmd[d->last_buffer]].end.branchAddress = 0;
1090
1091 spin_unlock_irqrestore(&d->lock,flags);
1092
1093 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
1094 {
1095 DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
1096 d->ctx);
1097 put_timestamp(ohci, d, d->last_buffer);
1098
1099 /* Tell the controller where the first program is */
1100 reg_write(ohci, d->cmdPtr,
1101 dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 0) | 0x3);
1102
1103 /* Run IT context */
1104 reg_write(ohci, d->ctrlSet, 0x8000);
1105 }
1106 else {
1107 /* Wake up dma context if necessary */
1108 if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
1109 PRINT(KERN_INFO, ohci->host->id,
1110 "Waking up iso transmit dma ctx=%d",
1111 d->ctx);
1112 put_timestamp(ohci, d, d->last_buffer);
1113 reg_write(ohci, d->ctrlSet, 0x1000);
1114 }
1115 }
1116
1117 kfree(psizes);
1118 return 0;
1119
1120 }
1121 case VIDEO1394_IOC_TALK_WAIT_BUFFER:
1122 {
1123 struct video1394_wait v;
1124 struct dma_iso_ctx *d;
1125
1126 if (copy_from_user(&v, argp, sizeof(v)))
1127 return -EFAULT;
1128
1129 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1130 if (d == NULL) return -EFAULT;
1131
1132 if ((v.buffer<0) || (v.buffer>=d->num_desc-1)) {
1133 PRINT(KERN_ERR, ohci->host->id,
1134 "Buffer %d out of range",v.buffer);
1135 return -EINVAL;
1136 }
1137
1138 switch(d->buffer_status[v.buffer]) {
1139 case VIDEO1394_BUFFER_READY:
1140 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1141 return 0;
1142 case VIDEO1394_BUFFER_QUEUED:
1143 wait_event_interruptible(d->waitq,
1144 (d->buffer_status[v.buffer] == VIDEO1394_BUFFER_READY));
1145 if (signal_pending(current))
1146 return -EINTR;
1147 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1148 return 0;
1149 default:
1150 PRINT(KERN_ERR, ohci->host->id,
1151 "Buffer %d is not queued",v.buffer);
1152 return -ESRCH;
1153 }
1154 }
1155 default:
1156 return -ENOTTY;
1157 }
1158 }
1159
1160 static long video1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1161 {
1162 int err;
1163 lock_kernel();
1164 err = __video1394_ioctl(file, cmd, arg);
1165 unlock_kernel();
1166 return err;
1167 }
1168
1169 /*
1170 * This maps the vmalloced and reserved buffer to user space.
1171 *
1172 * FIXME:
1173 * - PAGE_READONLY should suffice!?
1174 * - remap_pfn_range is kind of inefficient for page by page remapping.
1175 * But e.g. pte_alloc() does not work in modules ... :-(
1176 */
1177
1178 static int video1394_mmap(struct file *file, struct vm_area_struct *vma)
1179 {
1180 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1181 int res = -EINVAL;
1182
1183 lock_kernel();
1184 if (ctx->current_ctx == NULL) {
1185 PRINT(KERN_ERR, ctx->ohci->host->id, "Current iso context not set");
1186 } else
1187 res = dma_region_mmap(&ctx->current_ctx->dma, file, vma);
1188 unlock_kernel();
1189
1190 return res;
1191 }
1192
1193 static int video1394_open(struct inode *inode, struct file *file)
1194 {
1195 int i = ieee1394_file_to_instance(file);
1196 struct ti_ohci *ohci;
1197 struct file_ctx *ctx;
1198
1199 ohci = hpsb_get_hostinfo_bykey(&video1394_highlevel, i);
1200 if (ohci == NULL)
1201 return -EIO;
1202
1203 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1204 if (!ctx) {
1205 PRINT(KERN_ERR, ohci->host->id, "Cannot malloc file_ctx");
1206 return -ENOMEM;
1207 }
1208
1209 ctx->ohci = ohci;
1210 INIT_LIST_HEAD(&ctx->context_list);
1211 ctx->current_ctx = NULL;
1212 file->private_data = ctx;
1213
1214 return 0;
1215 }
1216
1217 static int video1394_release(struct inode *inode, struct file *file)
1218 {
1219 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1220 struct ti_ohci *ohci = ctx->ohci;
1221 struct list_head *lh, *next;
1222 u64 mask;
1223
1224 lock_kernel();
1225 list_for_each_safe(lh, next, &ctx->context_list) {
1226 struct dma_iso_ctx *d;
1227 d = list_entry(lh, struct dma_iso_ctx, link);
1228 mask = (u64) 1 << d->channel;
1229
1230 if (!(ohci->ISO_channel_usage & mask))
1231 PRINT(KERN_ERR, ohci->host->id, "On release: Channel %d "
1232 "is not being used", d->channel);
1233 else
1234 ohci->ISO_channel_usage &= ~mask;
1235 PRINT(KERN_INFO, ohci->host->id, "On release: Iso %s context "
1236 "%d stop listening on channel %d",
1237 d->type == OHCI_ISO_RECEIVE ? "receive" : "transmit",
1238 d->ctx, d->channel);
1239 free_dma_iso_ctx(d);
1240 }
1241
1242 kfree(ctx);
1243 file->private_data = NULL;
1244
1245 unlock_kernel();
1246 return 0;
1247 }
1248
1249 #ifdef CONFIG_COMPAT
1250 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
1251 #endif
1252
1253 static struct cdev video1394_cdev;
1254 static struct file_operations video1394_fops=
1255 {
1256 .owner = THIS_MODULE,
1257 .unlocked_ioctl = video1394_ioctl,
1258 #ifdef CONFIG_COMPAT
1259 .compat_ioctl = video1394_compat_ioctl,
1260 #endif
1261 .mmap = video1394_mmap,
1262 .open = video1394_open,
1263 .release = video1394_release
1264 };
1265
1266 /*** HOTPLUG STUFF **********************************************************/
1267 /*
1268 * Export information about protocols/devices supported by this driver.
1269 */
1270 static struct ieee1394_device_id video1394_id_table[] = {
1271 {
1272 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1273 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1274 .version = CAMERA_SW_VERSION_ENTRY & 0xffffff
1275 },
1276 {
1277 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1278 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1279 .version = (CAMERA_SW_VERSION_ENTRY + 1) & 0xffffff
1280 },
1281 {
1282 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1283 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1284 .version = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff
1285 },
1286 { }
1287 };
1288
1289 MODULE_DEVICE_TABLE(ieee1394, video1394_id_table);
1290
1291 static struct hpsb_protocol_driver video1394_driver = {
1292 .name = "1394 Digital Camera Driver",
1293 .id_table = video1394_id_table,
1294 .driver = {
1295 .name = VIDEO1394_DRIVER_NAME,
1296 .bus = &ieee1394_bus_type,
1297 },
1298 };
1299
1300
1301 static void video1394_add_host (struct hpsb_host *host)
1302 {
1303 struct ti_ohci *ohci;
1304 int minor;
1305
1306 /* We only work with the OHCI-1394 driver */
1307 if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME))
1308 return;
1309
1310 ohci = (struct ti_ohci *)host->hostdata;
1311
1312 if (!hpsb_create_hostinfo(&video1394_highlevel, host, 0)) {
1313 PRINT(KERN_ERR, ohci->host->id, "Cannot allocate hostinfo");
1314 return;
1315 }
1316
1317 hpsb_set_hostinfo(&video1394_highlevel, host, ohci);
1318 hpsb_set_hostinfo_key(&video1394_highlevel, host, ohci->host->id);
1319
1320 minor = IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id;
1321 class_device_create(hpsb_protocol_class, NULL, MKDEV(
1322 IEEE1394_MAJOR, minor),
1323 NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1324 }
1325
1326
1327 static void video1394_remove_host (struct hpsb_host *host)
1328 {
1329 struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
1330
1331 if (ohci)
1332 class_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
1333 IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
1334 return;
1335 }
1336
1337
1338 static struct hpsb_highlevel video1394_highlevel = {
1339 .name = VIDEO1394_DRIVER_NAME,
1340 .add_host = video1394_add_host,
1341 .remove_host = video1394_remove_host,
1342 };
1343
1344 MODULE_AUTHOR("Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>");
1345 MODULE_DESCRIPTION("driver for digital video on OHCI board");
1346 MODULE_SUPPORTED_DEVICE(VIDEO1394_DRIVER_NAME);
1347 MODULE_LICENSE("GPL");
1348
1349 #ifdef CONFIG_COMPAT
1350
1351 #define VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER \
1352 _IOW ('#', 0x12, struct video1394_wait32)
1353 #define VIDEO1394_IOC32_LISTEN_WAIT_BUFFER \
1354 _IOWR('#', 0x13, struct video1394_wait32)
1355 #define VIDEO1394_IOC32_TALK_WAIT_BUFFER \
1356 _IOW ('#', 0x17, struct video1394_wait32)
1357 #define VIDEO1394_IOC32_LISTEN_POLL_BUFFER \
1358 _IOWR('#', 0x18, struct video1394_wait32)
1359
1360 struct video1394_wait32 {
1361 u32 channel;
1362 u32 buffer;
1363 struct compat_timeval filltime;
1364 };
1365
1366 static int video1394_wr_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1367 {
1368 struct video1394_wait32 __user *argp = (void __user *)arg;
1369 struct video1394_wait32 wait32;
1370 struct video1394_wait wait;
1371 mm_segment_t old_fs;
1372 int ret;
1373
1374 if (copy_from_user(&wait32, argp, sizeof(wait32)))
1375 return -EFAULT;
1376
1377 wait.channel = wait32.channel;
1378 wait.buffer = wait32.buffer;
1379 wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1380 wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1381
1382 old_fs = get_fs();
1383 set_fs(KERNEL_DS);
1384 if (cmd == VIDEO1394_IOC32_LISTEN_WAIT_BUFFER)
1385 ret = video1394_ioctl(file,
1386 VIDEO1394_IOC_LISTEN_WAIT_BUFFER,
1387 (unsigned long) &wait);
1388 else
1389 ret = video1394_ioctl(file,
1390 VIDEO1394_IOC_LISTEN_POLL_BUFFER,
1391 (unsigned long) &wait);
1392 set_fs(old_fs);
1393
1394 if (!ret) {
1395 wait32.channel = wait.channel;
1396 wait32.buffer = wait.buffer;
1397 wait32.filltime.tv_sec = (int)wait.filltime.tv_sec;
1398 wait32.filltime.tv_usec = (int)wait.filltime.tv_usec;
1399
1400 if (copy_to_user(argp, &wait32, sizeof(wait32)))
1401 ret = -EFAULT;
1402 }
1403
1404 return ret;
1405 }
1406
1407 static int video1394_w_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1408 {
1409 struct video1394_wait32 wait32;
1410 struct video1394_wait wait;
1411 mm_segment_t old_fs;
1412 int ret;
1413
1414 if (copy_from_user(&wait32, (void __user *)arg, sizeof(wait32)))
1415 return -EFAULT;
1416
1417 wait.channel = wait32.channel;
1418 wait.buffer = wait32.buffer;
1419 wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1420 wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1421
1422 old_fs = get_fs();
1423 set_fs(KERNEL_DS);
1424 if (cmd == VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER)
1425 ret = video1394_ioctl(file,
1426 VIDEO1394_IOC_LISTEN_QUEUE_BUFFER,
1427 (unsigned long) &wait);
1428 else
1429 ret = video1394_ioctl(file,
1430 VIDEO1394_IOC_TALK_WAIT_BUFFER,
1431 (unsigned long) &wait);
1432 set_fs(old_fs);
1433
1434 return ret;
1435 }
1436
1437 static int video1394_queue_buf32(struct file *file, unsigned int cmd, unsigned long arg)
1438 {
1439 return -EFAULT; /* ??? was there before. */
1440
1441 return video1394_ioctl(file,
1442 VIDEO1394_IOC_TALK_QUEUE_BUFFER, arg);
1443 }
1444
1445 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
1446 {
1447 switch (cmd) {
1448 case VIDEO1394_IOC_LISTEN_CHANNEL:
1449 case VIDEO1394_IOC_UNLISTEN_CHANNEL:
1450 case VIDEO1394_IOC_TALK_CHANNEL:
1451 case VIDEO1394_IOC_UNTALK_CHANNEL:
1452 return video1394_ioctl(f, cmd, arg);
1453
1454 case VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER:
1455 return video1394_w_wait32(f, cmd, arg);
1456 case VIDEO1394_IOC32_LISTEN_WAIT_BUFFER:
1457 return video1394_wr_wait32(f, cmd, arg);
1458 case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1459 return video1394_queue_buf32(f, cmd, arg);
1460 case VIDEO1394_IOC32_TALK_WAIT_BUFFER:
1461 return video1394_w_wait32(f, cmd, arg);
1462 case VIDEO1394_IOC32_LISTEN_POLL_BUFFER:
1463 return video1394_wr_wait32(f, cmd, arg);
1464 default:
1465 return -ENOIOCTLCMD;
1466 }
1467 }
1468
1469 #endif /* CONFIG_COMPAT */
1470
1471 static void __exit video1394_exit_module (void)
1472 {
1473 hpsb_unregister_protocol(&video1394_driver);
1474 hpsb_unregister_highlevel(&video1394_highlevel);
1475 cdev_del(&video1394_cdev);
1476 PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
1477 }
1478
1479 static int __init video1394_init_module (void)
1480 {
1481 int ret;
1482
1483 cdev_init(&video1394_cdev, &video1394_fops);
1484 video1394_cdev.owner = THIS_MODULE;
1485 kobject_set_name(&video1394_cdev.kobj, VIDEO1394_DRIVER_NAME);
1486 ret = cdev_add(&video1394_cdev, IEEE1394_VIDEO1394_DEV, 16);
1487 if (ret) {
1488 PRINT_G(KERN_ERR, "video1394: unable to get minor device block");
1489 return ret;
1490 }
1491
1492 hpsb_register_highlevel(&video1394_highlevel);
1493
1494 ret = hpsb_register_protocol(&video1394_driver);
1495 if (ret) {
1496 PRINT_G(KERN_ERR, "video1394: failed to register protocol");
1497 hpsb_unregister_highlevel(&video1394_highlevel);
1498 cdev_del(&video1394_cdev);
1499 return ret;
1500 }
1501
1502 PRINT_G(KERN_INFO, "Installed " VIDEO1394_DRIVER_NAME " module");
1503 return 0;
1504 }
1505
1506
1507 module_init(video1394_init_module);
1508 module_exit(video1394_exit_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree