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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ieee1394 / video1394.c
blob4bedf7113f407e56bc1e509e255eab669cc2fe27
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 * jds -- add private data to file to keep track of iso contexts associated
23 * with each open -- so release won't kill all iso transfers.
24 *
25 * Damien Douxchamps: Fix failure when the number of DMA pages per frame is
26 * one.
27 *
28 * ioctl return codes:
29 * EFAULT is only for invalid address for the argp
30 * EINVAL for out of range values
31 * EBUSY when trying to use an already used resource
32 * ESRCH when trying to free/stop a not used resource
33 * EAGAIN for resource allocation failure that could perhaps succeed later
34 * ENOTTY for unsupported ioctl request
35 *
36 */
37
38 #include <linux/config.h>
39 #include <linux/kernel.h>
40 #include <linux/list.h>
41 #include <linux/slab.h>
42 #include <linux/interrupt.h>
43 #include <linux/wait.h>
44 #include <linux/errno.h>
45 #include <linux/module.h>
46 #include <linux/init.h>
47 #include <linux/pci.h>
48 #include <linux/fs.h>
49 #include <linux/poll.h>
50 #include <linux/smp_lock.h>
51 #include <linux/delay.h>
52 #include <linux/devfs_fs_kernel.h>
53 #include <linux/bitops.h>
54 #include <linux/types.h>
55 #include <linux/vmalloc.h>
56 #include <linux/timex.h>
57 #include <linux/mm.h>
58 #include <linux/ioctl32.h>
59 #include <linux/compat.h>
60 #include <linux/cdev.h>
61
62 #include "ieee1394.h"
63 #include "ieee1394_types.h"
64 #include "hosts.h"
65 #include "ieee1394_core.h"
66 #include "highlevel.h"
67 #include "video1394.h"
68 #include "nodemgr.h"
69 #include "dma.h"
70
71 #include "ohci1394.h"
72
73 #define ISO_CHANNELS 64
74
75 #ifndef virt_to_page
76 #define virt_to_page(x) MAP_NR(x)
77 #endif
78
79 #ifndef vmalloc_32
80 #define vmalloc_32(x) vmalloc(x)
81 #endif
82
83 struct it_dma_prg {
84 struct dma_cmd begin;
85 quadlet_t data[4];
86 struct dma_cmd end;
87 quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
88 };
89
90 struct dma_iso_ctx {
91 struct ti_ohci *ohci;
92 int type; /* OHCI_ISO_TRANSMIT or OHCI_ISO_RECEIVE */
93 struct ohci1394_iso_tasklet iso_tasklet;
94 int channel;
95 int ctx;
96 int last_buffer;
97 int * next_buffer; /* For ISO Transmit of video packets
98 to write the correct SYT field
99 into the next block */
100 unsigned int num_desc;
101 unsigned int buf_size;
102 unsigned int frame_size;
103 unsigned int packet_size;
104 unsigned int left_size;
105 unsigned int nb_cmd;
106
107 struct dma_region dma;
108
109 struct dma_prog_region *prg_reg;
110
111 struct dma_cmd **ir_prg;
112 struct it_dma_prg **it_prg;
113
114 unsigned int *buffer_status;
115 struct timeval *buffer_time; /* time when the buffer was received */
116 unsigned int *last_used_cmd; /* For ISO Transmit with
117 variable sized packets only ! */
118 int ctrlClear;
119 int ctrlSet;
120 int cmdPtr;
121 int ctxMatch;
122 wait_queue_head_t waitq;
123 spinlock_t lock;
124 unsigned int syt_offset;
125 int flags;
126
127 struct list_head link;
128 };
129
130
131 struct file_ctx {
132 struct ti_ohci *ohci;
133 struct list_head context_list;
134 struct dma_iso_ctx *current_ctx;
135 };
136
137 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
138 #define VIDEO1394_DEBUG
139 #endif
140
141 #ifdef DBGMSG
142 #undef DBGMSG
143 #endif
144
145 #ifdef VIDEO1394_DEBUG
146 #define DBGMSG(card, fmt, args...) \
147 printk(KERN_INFO "video1394_%d: " fmt "\n" , card , ## args)
148 #else
149 #define DBGMSG(card, fmt, args...)
150 #endif
151
152 /* print general (card independent) information */
153 #define PRINT_G(level, fmt, args...) \
154 printk(level "video1394: " fmt "\n" , ## args)
155
156 /* print card specific information */
157 #define PRINT(level, card, fmt, args...) \
158 printk(level "video1394_%d: " fmt "\n" , card , ## args)
159
160 static void wakeup_dma_ir_ctx(unsigned long l);
161 static void wakeup_dma_it_ctx(unsigned long l);
162
163 static struct hpsb_highlevel video1394_highlevel;
164
165 static int free_dma_iso_ctx(struct dma_iso_ctx *d)
166 {
167 int i;
168
169 DBGMSG(d->ohci->host->id, "Freeing dma_iso_ctx %d", d->ctx);
170
171 ohci1394_stop_context(d->ohci, d->ctrlClear, NULL);
172 if (d->iso_tasklet.link.next != NULL)
173 ohci1394_unregister_iso_tasklet(d->ohci, &d->iso_tasklet);
174
175 dma_region_free(&d->dma);
176
177 if (d->prg_reg) {
178 for (i = 0; i < d->num_desc; i++)
179 dma_prog_region_free(&d->prg_reg[i]);
180 kfree(d->prg_reg);
181 }
182
183 if (d->ir_prg)
184 kfree(d->ir_prg);
185
186 if (d->it_prg)
187 kfree(d->it_prg);
188
189 if (d->buffer_status)
190 kfree(d->buffer_status);
191 if (d->buffer_time)
192 kfree(d->buffer_time);
193 if (d->last_used_cmd)
194 kfree(d->last_used_cmd);
195 if (d->next_buffer)
196 kfree(d->next_buffer);
197
198 list_del(&d->link);
199
200 kfree(d);
201
202 return 0;
203 }
204
205 static struct dma_iso_ctx *
206 alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int num_desc,
207 int buf_size, int channel, unsigned int packet_size)
208 {
209 struct dma_iso_ctx *d;
210 int i;
211
212 d = kmalloc(sizeof(struct dma_iso_ctx), GFP_KERNEL);
213 if (d == NULL) {
214 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma_iso_ctx");
215 return NULL;
216 }
217
218 memset(d, 0, sizeof *d);
219
220 d->ohci = ohci;
221 d->type = type;
222 d->channel = channel;
223 d->num_desc = num_desc;
224 d->frame_size = buf_size;
225 d->buf_size = PAGE_ALIGN(buf_size);
226 d->last_buffer = -1;
227 INIT_LIST_HEAD(&d->link);
228 init_waitqueue_head(&d->waitq);
229
230 /* Init the regions for easy cleanup */
231 dma_region_init(&d->dma);
232
233 if (dma_region_alloc(&d->dma, d->num_desc * d->buf_size, ohci->dev,
234 PCI_DMA_BIDIRECTIONAL)) {
235 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma buffer");
236 free_dma_iso_ctx(d);
237 return NULL;
238 }
239
240 if (type == OHCI_ISO_RECEIVE)
241 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
242 wakeup_dma_ir_ctx,
243 (unsigned long) d);
244 else
245 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
246 wakeup_dma_it_ctx,
247 (unsigned long) d);
248
249 if (ohci1394_register_iso_tasklet(ohci, &d->iso_tasklet) < 0) {
250 PRINT(KERN_ERR, ohci->host->id, "no free iso %s contexts",
251 type == OHCI_ISO_RECEIVE ? "receive" : "transmit");
252 free_dma_iso_ctx(d);
253 return NULL;
254 }
255 d->ctx = d->iso_tasklet.context;
256
257 d->prg_reg = kmalloc(d->num_desc * sizeof(struct dma_prog_region),
258 GFP_KERNEL);
259 if (d->prg_reg == NULL) {
260 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate ir prg regs");
261 free_dma_iso_ctx(d);
262 return NULL;
263 }
264 /* Makes for easier cleanup */
265 for (i = 0; i < d->num_desc; i++)
266 dma_prog_region_init(&d->prg_reg[i]);
267
268 if (type == OHCI_ISO_RECEIVE) {
269 d->ctrlSet = OHCI1394_IsoRcvContextControlSet+32*d->ctx;
270 d->ctrlClear = OHCI1394_IsoRcvContextControlClear+32*d->ctx;
271 d->cmdPtr = OHCI1394_IsoRcvCommandPtr+32*d->ctx;
272 d->ctxMatch = OHCI1394_IsoRcvContextMatch+32*d->ctx;
273
274 d->ir_prg = kmalloc(d->num_desc * sizeof(struct dma_cmd *),
275 GFP_KERNEL);
276
277 if (d->ir_prg == NULL) {
278 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
279 free_dma_iso_ctx(d);
280 return NULL;
281 }
282 memset(d->ir_prg, 0, d->num_desc * sizeof(struct dma_cmd *));
283
284 d->nb_cmd = d->buf_size / PAGE_SIZE + 1;
285 d->left_size = (d->frame_size % PAGE_SIZE) ?
286 d->frame_size % PAGE_SIZE : PAGE_SIZE;
287
288 for (i = 0;i < d->num_desc; i++) {
289 if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
290 sizeof(struct dma_cmd), ohci->dev)) {
291 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
292 free_dma_iso_ctx(d);
293 return NULL;
294 }
295 d->ir_prg[i] = (struct dma_cmd *)d->prg_reg[i].kvirt;
296 }
297
298 } else { /* OHCI_ISO_TRANSMIT */
299 d->ctrlSet = OHCI1394_IsoXmitContextControlSet+16*d->ctx;
300 d->ctrlClear = OHCI1394_IsoXmitContextControlClear+16*d->ctx;
301 d->cmdPtr = OHCI1394_IsoXmitCommandPtr+16*d->ctx;
302
303 d->it_prg = kmalloc(d->num_desc * sizeof(struct it_dma_prg *),
304 GFP_KERNEL);
305
306 if (d->it_prg == NULL) {
307 PRINT(KERN_ERR, ohci->host->id,
308 "Failed to allocate dma it prg");
309 free_dma_iso_ctx(d);
310 return NULL;
311 }
312 memset(d->it_prg, 0, d->num_desc*sizeof(struct it_dma_prg *));
313
314 d->packet_size = packet_size;
315
316 if (PAGE_SIZE % packet_size || packet_size>4096) {
317 PRINT(KERN_ERR, ohci->host->id,
318 "Packet size %d (page_size: %ld) "
319 "not yet supported\n",
320 packet_size, PAGE_SIZE);
321 free_dma_iso_ctx(d);
322 return NULL;
323 }
324
325 d->nb_cmd = d->frame_size / d->packet_size;
326 if (d->frame_size % d->packet_size) {
327 d->nb_cmd++;
328 d->left_size = d->frame_size % d->packet_size;
329 } else
330 d->left_size = d->packet_size;
331
332 for (i = 0; i < d->num_desc; i++) {
333 if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
334 sizeof(struct it_dma_prg), ohci->dev)) {
335 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma it prg");
336 free_dma_iso_ctx(d);
337 return NULL;
338 }
339 d->it_prg[i] = (struct it_dma_prg *)d->prg_reg[i].kvirt;
340 }
341 }
342
343 d->buffer_status = kmalloc(d->num_desc * sizeof(unsigned int),
344 GFP_KERNEL);
345 d->buffer_time = kmalloc(d->num_desc * sizeof(struct timeval),
346 GFP_KERNEL);
347 d->last_used_cmd = kmalloc(d->num_desc * sizeof(unsigned int),
348 GFP_KERNEL);
349 d->next_buffer = kmalloc(d->num_desc * sizeof(int),
350 GFP_KERNEL);
351
352 if (d->buffer_status == NULL) {
353 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_status");
354 free_dma_iso_ctx(d);
355 return NULL;
356 }
357 if (d->buffer_time == NULL) {
358 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_time");
359 free_dma_iso_ctx(d);
360 return NULL;
361 }
362 if (d->last_used_cmd == NULL) {
363 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate last_used_cmd");
364 free_dma_iso_ctx(d);
365 return NULL;
366 }
367 if (d->next_buffer == NULL) {
368 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate next_buffer");
369 free_dma_iso_ctx(d);
370 return NULL;
371 }
372 memset(d->buffer_status, 0, d->num_desc * sizeof(unsigned int));
373 memset(d->buffer_time, 0, d->num_desc * sizeof(struct timeval));
374 memset(d->last_used_cmd, 0, d->num_desc * sizeof(unsigned int));
375 memset(d->next_buffer, -1, d->num_desc * sizeof(int));
376
377 spin_lock_init(&d->lock);
378
379 PRINT(KERN_INFO, ohci->host->id, "Iso %s DMA: %d buffers "
380 "of size %d allocated for a frame size %d, each with %d prgs",
381 (type == OHCI_ISO_RECEIVE) ? "receive" : "transmit",
382 d->num_desc, d->buf_size, d->frame_size, d->nb_cmd);
383
384 return d;
385 }
386
387 static void reset_ir_status(struct dma_iso_ctx *d, int n)
388 {
389 int i;
390 d->ir_prg[n][0].status = cpu_to_le32(4);
391 d->ir_prg[n][1].status = cpu_to_le32(PAGE_SIZE-4);
392 for (i = 2; i < d->nb_cmd - 1; i++)
393 d->ir_prg[n][i].status = cpu_to_le32(PAGE_SIZE);
394 d->ir_prg[n][i].status = cpu_to_le32(d->left_size);
395 }
396
397 static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
398 {
399 struct dma_cmd *ir_prg = d->ir_prg[n];
400 struct dma_prog_region *ir_reg = &d->prg_reg[n];
401 unsigned long buf = (unsigned long)d->dma.kvirt + n * d->buf_size;
402 int i;
403
404 /* the first descriptor will read only 4 bytes */
405 ir_prg[0].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
406 DMA_CTL_BRANCH | 4);
407
408 /* set the sync flag */
409 if (flags & VIDEO1394_SYNC_FRAMES)
410 ir_prg[0].control |= cpu_to_le32(DMA_CTL_WAIT);
411
412 ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
413 (unsigned long)d->dma.kvirt));
414 ir_prg[0].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
415 1 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
416
417 /* If there is *not* only one DMA page per frame (hence, d->nb_cmd==2) */
418 if (d->nb_cmd > 2) {
419 /* The second descriptor will read PAGE_SIZE-4 bytes */
420 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
421 DMA_CTL_BRANCH | (PAGE_SIZE-4));
422 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf + 4) -
423 (unsigned long)d->dma.kvirt));
424 ir_prg[1].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
425 2 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
426
427 for (i = 2; i < d->nb_cmd - 1; i++) {
428 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
429 DMA_CTL_BRANCH | PAGE_SIZE);
430 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
431 (buf+(i-1)*PAGE_SIZE) -
432 (unsigned long)d->dma.kvirt));
433
434 ir_prg[i].branchAddress =
435 cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
436 (i + 1) * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
437 }
438
439 /* The last descriptor will generate an interrupt */
440 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
441 DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
442 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
443 (buf+(i-1)*PAGE_SIZE) -
444 (unsigned long)d->dma.kvirt));
445 } else {
446 /* Only one DMA page is used. Read d->left_size immediately and */
447 /* generate an interrupt as this is also the last page. */
448 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
449 DMA_CTL_IRQ | DMA_CTL_BRANCH | (d->left_size-4));
450 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
451 (buf + 4) - (unsigned long)d->dma.kvirt));
452 }
453 }
454
455 static void initialize_dma_ir_ctx(struct dma_iso_ctx *d, int tag, int flags)
456 {
457 struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
458 int i;
459
460 d->flags = flags;
461
462 ohci1394_stop_context(ohci, d->ctrlClear, NULL);
463
464 for (i=0;i<d->num_desc;i++) {
465 initialize_dma_ir_prg(d, i, flags);
466 reset_ir_status(d, i);
467 }
468
469 /* reset the ctrl register */
470 reg_write(ohci, d->ctrlClear, 0xf0000000);
471
472 /* Set bufferFill */
473 reg_write(ohci, d->ctrlSet, 0x80000000);
474
475 /* Set isoch header */
476 if (flags & VIDEO1394_INCLUDE_ISO_HEADERS)
477 reg_write(ohci, d->ctrlSet, 0x40000000);
478
479 /* Set the context match register to match on all tags,
480 sync for sync tag, and listen to d->channel */
481 reg_write(ohci, d->ctxMatch, 0xf0000000|((tag&0xf)<<8)|d->channel);
482
483 /* Set up isoRecvIntMask to generate interrupts */
484 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1<<d->ctx);
485 }
486
487 /* find which context is listening to this channel */
488 static struct dma_iso_ctx *
489 find_ctx(struct list_head *list, int type, int channel)
490 {
491 struct dma_iso_ctx *ctx;
492
493 list_for_each_entry(ctx, list, link) {
494 if (ctx->type == type && ctx->channel == channel)
495 return ctx;
496 }
497
498 return NULL;
499 }
500
501 static void wakeup_dma_ir_ctx(unsigned long l)
502 {
503 struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
504 int i;
505
506 spin_lock(&d->lock);
507
508 for (i = 0; i < d->num_desc; i++) {
509 if (d->ir_prg[i][d->nb_cmd-1].status & cpu_to_le32(0xFFFF0000)) {
510 reset_ir_status(d, i);
511 d->buffer_status[i] = VIDEO1394_BUFFER_READY;
512 do_gettimeofday(&d->buffer_time[i]);
513 }
514 }
515
516 spin_unlock(&d->lock);
517
518 if (waitqueue_active(&d->waitq))
519 wake_up_interruptible(&d->waitq);
520 }
521
522 static inline void put_timestamp(struct ti_ohci *ohci, struct dma_iso_ctx * d,
523 int n)
524 {
525 unsigned char* buf = d->dma.kvirt + n * d->buf_size;
526 u32 cycleTimer;
527 u32 timeStamp;
528
529 if (n == -1) {
530 return;
531 }
532
533 cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
534
535 timeStamp = ((cycleTimer & 0x0fff) + d->syt_offset); /* 11059 = 450 us */
536 timeStamp = (timeStamp % 3072 + ((timeStamp / 3072) << 12)
537 + (cycleTimer & 0xf000)) & 0xffff;
538
539 buf[6] = timeStamp >> 8;
540 buf[7] = timeStamp & 0xff;
541
542 /* if first packet is empty packet, then put timestamp into the next full one too */
543 if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
544 buf += d->packet_size;
545 buf[6] = timeStamp >> 8;
546 buf[7] = timeStamp & 0xff;
547 }
548
549 /* do the next buffer frame too in case of irq latency */
550 n = d->next_buffer[n];
551 if (n == -1) {
552 return;
553 }
554 buf = d->dma.kvirt + n * d->buf_size;
555
556 timeStamp += (d->last_used_cmd[n] << 12) & 0xffff;
557
558 buf[6] = timeStamp >> 8;
559 buf[7] = timeStamp & 0xff;
560
561 /* if first packet is empty packet, then put timestamp into the next full one too */
562 if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
563 buf += d->packet_size;
564 buf[6] = timeStamp >> 8;
565 buf[7] = timeStamp & 0xff;
566 }
567
568 #if 0
569 printk("curr: %d, next: %d, cycleTimer: %08x timeStamp: %08x\n",
570 curr, n, cycleTimer, timeStamp);
571 #endif
572 }
573
574 static void wakeup_dma_it_ctx(unsigned long l)
575 {
576 struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
577 struct ti_ohci *ohci = d->ohci;
578 int i;
579
580 spin_lock(&d->lock);
581
582 for (i = 0; i < d->num_desc; i++) {
583 if (d->it_prg[i][d->last_used_cmd[i]].end.status &
584 cpu_to_le32(0xFFFF0000)) {
585 int next = d->next_buffer[i];
586 put_timestamp(ohci, d, next);
587 d->it_prg[i][d->last_used_cmd[i]].end.status = 0;
588 d->buffer_status[i] = VIDEO1394_BUFFER_READY;
589 }
590 }
591
592 spin_unlock(&d->lock);
593
594 if (waitqueue_active(&d->waitq))
595 wake_up_interruptible(&d->waitq);
596 }
597
598 static void initialize_dma_it_prg(struct dma_iso_ctx *d, int n, int sync_tag)
599 {
600 struct it_dma_prg *it_prg = d->it_prg[n];
601 struct dma_prog_region *it_reg = &d->prg_reg[n];
602 unsigned long buf = (unsigned long)d->dma.kvirt + n * d->buf_size;
603 int i;
604 d->last_used_cmd[n] = d->nb_cmd - 1;
605 for (i=0;i<d->nb_cmd;i++) {
606
607 it_prg[i].begin.control = cpu_to_le32(DMA_CTL_OUTPUT_MORE |
608 DMA_CTL_IMMEDIATE | 8) ;
609 it_prg[i].begin.address = 0;
610
611 it_prg[i].begin.status = 0;
612
613 it_prg[i].data[0] = cpu_to_le32(
614 (IEEE1394_SPEED_100 << 16)
615 | (/* tag */ 1 << 14)
616 | (d->channel << 8)
617 | (TCODE_ISO_DATA << 4));
618 if (i==0) it_prg[i].data[0] |= cpu_to_le32(sync_tag);
619 it_prg[i].data[1] = cpu_to_le32(d->packet_size << 16);
620 it_prg[i].data[2] = 0;
621 it_prg[i].data[3] = 0;
622
623 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST |
624 DMA_CTL_BRANCH);
625 it_prg[i].end.address =
626 cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf+i*d->packet_size) -
627 (unsigned long)d->dma.kvirt));
628
629 if (i<d->nb_cmd-1) {
630 it_prg[i].end.control |= cpu_to_le32(d->packet_size);
631 it_prg[i].begin.branchAddress =
632 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
633 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
634 it_prg[i].end.branchAddress =
635 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
636 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
637 } else {
638 /* the last prg generates an interrupt */
639 it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
640 DMA_CTL_IRQ | d->left_size);
641 /* the last prg doesn't branch */
642 it_prg[i].begin.branchAddress = 0;
643 it_prg[i].end.branchAddress = 0;
644 }
645 it_prg[i].end.status = 0;
646 }
647 }
648
649 static void initialize_dma_it_prg_var_packet_queue(
650 struct dma_iso_ctx *d, int n, unsigned int * packet_sizes,
651 struct ti_ohci *ohci)
652 {
653 struct it_dma_prg *it_prg = d->it_prg[n];
654 struct dma_prog_region *it_reg = &d->prg_reg[n];
655 int i;
656
657 #if 0
658 if (n != -1) {
659 put_timestamp(ohci, d, n);
660 }
661 #endif
662 d->last_used_cmd[n] = d->nb_cmd - 1;
663
664 for (i = 0; i < d->nb_cmd; i++) {
665 unsigned int size;
666 if (packet_sizes[i] > d->packet_size) {
667 size = d->packet_size;
668 } else {
669 size = packet_sizes[i];
670 }
671 it_prg[i].data[1] = cpu_to_le32(size << 16);
672 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH);
673
674 if (i < d->nb_cmd-1 && packet_sizes[i+1] != 0) {
675 it_prg[i].end.control |= cpu_to_le32(size);
676 it_prg[i].begin.branchAddress =
677 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
678 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
679 it_prg[i].end.branchAddress =
680 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
681 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
682 } else {
683 /* the last prg generates an interrupt */
684 it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
685 DMA_CTL_IRQ | size);
686 /* the last prg doesn't branch */
687 it_prg[i].begin.branchAddress = 0;
688 it_prg[i].end.branchAddress = 0;
689 d->last_used_cmd[n] = i;
690 break;
691 }
692 }
693 }
694
695 static void initialize_dma_it_ctx(struct dma_iso_ctx *d, int sync_tag,
696 unsigned int syt_offset, int flags)
697 {
698 struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
699 int i;
700
701 d->flags = flags;
702 d->syt_offset = (syt_offset == 0 ? 11000 : syt_offset);
703
704 ohci1394_stop_context(ohci, d->ctrlClear, NULL);
705
706 for (i=0;i<d->num_desc;i++)
707 initialize_dma_it_prg(d, i, sync_tag);
708
709 /* Set up isoRecvIntMask to generate interrupts */
710 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1<<d->ctx);
711 }
712
713 static inline unsigned video1394_buffer_state(struct dma_iso_ctx *d,
714 unsigned int buffer)
715 {
716 unsigned long flags;
717 unsigned int ret;
718 spin_lock_irqsave(&d->lock, flags);
719 ret = d->buffer_status[buffer];
720 spin_unlock_irqrestore(&d->lock, flags);
721 return ret;
722 }
723
724 static int __video1394_ioctl(struct file *file,
725 unsigned int cmd, unsigned long arg)
726 {
727 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
728 struct ti_ohci *ohci = ctx->ohci;
729 unsigned long flags;
730 void __user *argp = (void __user *)arg;
731
732 switch(cmd)
733 {
734 case VIDEO1394_IOC_LISTEN_CHANNEL:
735 case VIDEO1394_IOC_TALK_CHANNEL:
736 {
737 struct video1394_mmap v;
738 u64 mask;
739 struct dma_iso_ctx *d;
740 int i;
741
742 if (copy_from_user(&v, argp, sizeof(v)))
743 return -EFAULT;
744
745 /* if channel < 0, find lowest available one */
746 if (v.channel < 0) {
747 mask = (u64)0x1;
748 for (i=0; ; i++) {
749 if (i == ISO_CHANNELS) {
750 PRINT(KERN_ERR, ohci->host->id,
751 "No free channel found");
752 return EAGAIN;
753 }
754 if (!(ohci->ISO_channel_usage & mask)) {
755 v.channel = i;
756 PRINT(KERN_INFO, ohci->host->id, "Found free channel %d", i);
757 break;
758 }
759 mask = mask << 1;
760 }
761 } else if (v.channel >= ISO_CHANNELS) {
762 PRINT(KERN_ERR, ohci->host->id,
763 "Iso channel %d out of bounds", v.channel);
764 return -EINVAL;
765 } else {
766 mask = (u64)0x1<<v.channel;
767 }
768 PRINT(KERN_INFO, ohci->host->id, "mask: %08X%08X usage: %08X%08X\n",
769 (u32)(mask>>32),(u32)(mask&0xffffffff),
770 (u32)(ohci->ISO_channel_usage>>32),
771 (u32)(ohci->ISO_channel_usage&0xffffffff));
772 if (ohci->ISO_channel_usage & mask) {
773 PRINT(KERN_ERR, ohci->host->id,
774 "Channel %d is already taken", v.channel);
775 return -EBUSY;
776 }
777
778 if (v.buf_size == 0 || v.buf_size > VIDEO1394_MAX_SIZE) {
779 PRINT(KERN_ERR, ohci->host->id,
780 "Invalid %d length buffer requested",v.buf_size);
781 return -EINVAL;
782 }
783
784 if (v.nb_buffers == 0 || v.nb_buffers > VIDEO1394_MAX_SIZE) {
785 PRINT(KERN_ERR, ohci->host->id,
786 "Invalid %d buffers requested",v.nb_buffers);
787 return -EINVAL;
788 }
789
790 if (v.nb_buffers * v.buf_size > VIDEO1394_MAX_SIZE) {
791 PRINT(KERN_ERR, ohci->host->id,
792 "%d buffers of size %d bytes is too big",
793 v.nb_buffers, v.buf_size);
794 return -EINVAL;
795 }
796
797 if (cmd == VIDEO1394_IOC_LISTEN_CHANNEL) {
798 d = alloc_dma_iso_ctx(ohci, OHCI_ISO_RECEIVE,
799 v.nb_buffers, v.buf_size,
800 v.channel, 0);
801
802 if (d == NULL) {
803 PRINT(KERN_ERR, ohci->host->id,
804 "Couldn't allocate ir context");
805 return -EAGAIN;
806 }
807 initialize_dma_ir_ctx(d, v.sync_tag, v.flags);
808
809 ctx->current_ctx = d;
810
811 v.buf_size = d->buf_size;
812 list_add_tail(&d->link, &ctx->context_list);
813
814 PRINT(KERN_INFO, ohci->host->id,
815 "iso context %d listen on channel %d",
816 d->ctx, v.channel);
817 }
818 else {
819 d = alloc_dma_iso_ctx(ohci, OHCI_ISO_TRANSMIT,
820 v.nb_buffers, v.buf_size,
821 v.channel, v.packet_size);
822
823 if (d == NULL) {
824 PRINT(KERN_ERR, ohci->host->id,
825 "Couldn't allocate it context");
826 return -EAGAIN;
827 }
828 initialize_dma_it_ctx(d, v.sync_tag,
829 v.syt_offset, v.flags);
830
831 ctx->current_ctx = d;
832
833 v.buf_size = d->buf_size;
834
835 list_add_tail(&d->link, &ctx->context_list);
836
837 PRINT(KERN_INFO, ohci->host->id,
838 "Iso context %d talk on channel %d", d->ctx,
839 v.channel);
840 }
841
842 if (copy_to_user((void *)arg, &v, sizeof(v))) {
843 /* FIXME : free allocated dma resources */
844 return -EFAULT;
845 }
846
847 ohci->ISO_channel_usage |= mask;
848
849 return 0;
850 }
851 case VIDEO1394_IOC_UNLISTEN_CHANNEL:
852 case VIDEO1394_IOC_UNTALK_CHANNEL:
853 {
854 int channel;
855 u64 mask;
856 struct dma_iso_ctx *d;
857
858 if (copy_from_user(&channel, argp, sizeof(int)))
859 return -EFAULT;
860
861 if (channel < 0 || channel >= ISO_CHANNELS) {
862 PRINT(KERN_ERR, ohci->host->id,
863 "Iso channel %d out of bound", channel);
864 return -EINVAL;
865 }
866 mask = (u64)0x1<<channel;
867 if (!(ohci->ISO_channel_usage & mask)) {
868 PRINT(KERN_ERR, ohci->host->id,
869 "Channel %d is not being used", channel);
870 return -ESRCH;
871 }
872
873 /* Mark this channel as unused */
874 ohci->ISO_channel_usage &= ~mask;
875
876 if (cmd == VIDEO1394_IOC_UNLISTEN_CHANNEL)
877 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, channel);
878 else
879 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, channel);
880
881 if (d == NULL) return -ESRCH;
882 PRINT(KERN_INFO, ohci->host->id, "Iso context %d "
883 "stop talking on channel %d", d->ctx, channel);
884 free_dma_iso_ctx(d);
885
886 return 0;
887 }
888 case VIDEO1394_IOC_LISTEN_QUEUE_BUFFER:
889 {
890 struct video1394_wait v;
891 struct dma_iso_ctx *d;
892
893 if (copy_from_user(&v, argp, sizeof(v)))
894 return -EFAULT;
895
896 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
897 if (d == NULL) return -EFAULT;
898
899 if ((v.buffer<0) || (v.buffer>d->num_desc)) {
900 PRINT(KERN_ERR, ohci->host->id,
901 "Buffer %d out of range",v.buffer);
902 return -EINVAL;
903 }
904
905 spin_lock_irqsave(&d->lock,flags);
906
907 if (d->buffer_status[v.buffer]==VIDEO1394_BUFFER_QUEUED) {
908 PRINT(KERN_ERR, ohci->host->id,
909 "Buffer %d is already used",v.buffer);
910 spin_unlock_irqrestore(&d->lock,flags);
911 return -EBUSY;
912 }
913
914 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
915
916 if (d->last_buffer>=0)
917 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress =
918 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer], 0)
919 & 0xfffffff0) | 0x1);
920
921 d->last_buffer = v.buffer;
922
923 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress = 0;
924
925 spin_unlock_irqrestore(&d->lock,flags);
926
927 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
928 {
929 DBGMSG(ohci->host->id, "Starting iso DMA ctx=%d",d->ctx);
930
931 /* Tell the controller where the first program is */
932 reg_write(ohci, d->cmdPtr,
933 dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer], 0) | 0x1);
934
935 /* Run IR context */
936 reg_write(ohci, d->ctrlSet, 0x8000);
937 }
938 else {
939 /* Wake up dma context if necessary */
940 if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
941 PRINT(KERN_INFO, ohci->host->id,
942 "Waking up iso dma ctx=%d", d->ctx);
943 reg_write(ohci, d->ctrlSet, 0x1000);
944 }
945 }
946 return 0;
947
948 }
949 case VIDEO1394_IOC_LISTEN_WAIT_BUFFER:
950 case VIDEO1394_IOC_LISTEN_POLL_BUFFER:
951 {
952 struct video1394_wait v;
953 struct dma_iso_ctx *d;
954 int i;
955
956 if (copy_from_user(&v, argp, sizeof(v)))
957 return -EFAULT;
958
959 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
960 if (d == NULL) return -EFAULT;
961
962 if ((v.buffer<0) || (v.buffer>d->num_desc)) {
963 PRINT(KERN_ERR, ohci->host->id,
964 "Buffer %d out of range",v.buffer);
965 return -EINVAL;
966 }
967
968 /*
969 * I change the way it works so that it returns
970 * the last received frame.
971 */
972 spin_lock_irqsave(&d->lock, flags);
973 switch(d->buffer_status[v.buffer]) {
974 case VIDEO1394_BUFFER_READY:
975 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
976 break;
977 case VIDEO1394_BUFFER_QUEUED:
978 if (cmd == VIDEO1394_IOC_LISTEN_POLL_BUFFER) {
979 /* for polling, return error code EINTR */
980 spin_unlock_irqrestore(&d->lock, flags);
981 return -EINTR;
982 }
983
984 spin_unlock_irqrestore(&d->lock, flags);
985 wait_event_interruptible(d->waitq,
986 video1394_buffer_state(d, v.buffer) ==
987 VIDEO1394_BUFFER_READY);
988 if (signal_pending(current))
989 return -EINTR;
990 spin_lock_irqsave(&d->lock, flags);
991 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
992 break;
993 default:
994 PRINT(KERN_ERR, ohci->host->id,
995 "Buffer %d is not queued",v.buffer);
996 spin_unlock_irqrestore(&d->lock, flags);
997 return -ESRCH;
998 }
999
1000 /* set time of buffer */
1001 v.filltime = d->buffer_time[v.buffer];
1002 // printk("Buffer %d time %d\n", v.buffer, (d->buffer_time[v.buffer]).tv_usec);
1003
1004 /*
1005 * Look ahead to see how many more buffers have been received
1006 */
1007 i=0;
1008 while (d->buffer_status[(v.buffer+1)%d->num_desc]==
1009 VIDEO1394_BUFFER_READY) {
1010 v.buffer=(v.buffer+1)%d->num_desc;
1011 i++;
1012 }
1013 spin_unlock_irqrestore(&d->lock, flags);
1014
1015 v.buffer=i;
1016 if (copy_to_user(argp, &v, sizeof(v)))
1017 return -EFAULT;
1018
1019 return 0;
1020 }
1021 case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1022 {
1023 struct video1394_wait v;
1024 unsigned int *psizes = NULL;
1025 struct dma_iso_ctx *d;
1026
1027 if (copy_from_user(&v, argp, sizeof(v)))
1028 return -EFAULT;
1029
1030 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1031 if (d == NULL) return -EFAULT;
1032
1033 if ((v.buffer<0) || (v.buffer>d->num_desc)) {
1034 PRINT(KERN_ERR, ohci->host->id,
1035 "Buffer %d out of range",v.buffer);
1036 return -EINVAL;
1037 }
1038
1039 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1040 int buf_size = d->nb_cmd * sizeof(unsigned int);
1041 struct video1394_queue_variable __user *p = argp;
1042 unsigned int __user *qv;
1043
1044 if (get_user(qv, &p->packet_sizes))
1045 return -EFAULT;
1046
1047 psizes = kmalloc(buf_size, GFP_KERNEL);
1048 if (!psizes)
1049 return -ENOMEM;
1050
1051 if (copy_from_user(psizes, qv, buf_size)) {
1052 kfree(psizes);
1053 return -EFAULT;
1054 }
1055 }
1056
1057 spin_lock_irqsave(&d->lock,flags);
1058
1059 if (d->buffer_status[v.buffer]!=VIDEO1394_BUFFER_FREE) {
1060 PRINT(KERN_ERR, ohci->host->id,
1061 "Buffer %d is already used",v.buffer);
1062 spin_unlock_irqrestore(&d->lock,flags);
1063 if (psizes)
1064 kfree(psizes);
1065 return -EBUSY;
1066 }
1067
1068 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1069 initialize_dma_it_prg_var_packet_queue(
1070 d, v.buffer, psizes,
1071 ohci);
1072 }
1073
1074 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
1075
1076 if (d->last_buffer >= 0) {
1077 d->it_prg[d->last_buffer]
1078 [ d->last_used_cmd[d->last_buffer] ].end.branchAddress =
1079 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer],
1080 0) & 0xfffffff0) | 0x3);
1081
1082 d->it_prg[d->last_buffer]
1083 [ d->last_used_cmd[d->last_buffer] ].begin.branchAddress =
1084 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer],
1085 0) & 0xfffffff0) | 0x3);
1086 d->next_buffer[d->last_buffer] = v.buffer;
1087 }
1088 d->last_buffer = v.buffer;
1089 d->next_buffer[d->last_buffer] = -1;
1090
1091 d->it_prg[d->last_buffer][d->last_used_cmd[d->last_buffer]].end.branchAddress = 0;
1092
1093 spin_unlock_irqrestore(&d->lock,flags);
1094
1095 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
1096 {
1097 DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
1098 d->ctx);
1099 put_timestamp(ohci, d, d->last_buffer);
1100
1101 /* Tell the controller where the first program is */
1102 reg_write(ohci, d->cmdPtr,
1103 dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer], 0) | 0x3);
1104
1105 /* Run IT context */
1106 reg_write(ohci, d->ctrlSet, 0x8000);
1107 }
1108 else {
1109 /* Wake up dma context if necessary */
1110 if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
1111 PRINT(KERN_INFO, ohci->host->id,
1112 "Waking up iso transmit dma ctx=%d",
1113 d->ctx);
1114 put_timestamp(ohci, d, d->last_buffer);
1115 reg_write(ohci, d->ctrlSet, 0x1000);
1116 }
1117 }
1118
1119 if (psizes)
1120 kfree(psizes);
1121
1122 return 0;
1123
1124 }
1125 case VIDEO1394_IOC_TALK_WAIT_BUFFER:
1126 {
1127 struct video1394_wait v;
1128 struct dma_iso_ctx *d;
1129
1130 if (copy_from_user(&v, argp, sizeof(v)))
1131 return -EFAULT;
1132
1133 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1134 if (d == NULL) return -EFAULT;
1135
1136 if ((v.buffer<0) || (v.buffer>d->num_desc)) {
1137 PRINT(KERN_ERR, ohci->host->id,
1138 "Buffer %d out of range",v.buffer);
1139 return -EINVAL;
1140 }
1141
1142 switch(d->buffer_status[v.buffer]) {
1143 case VIDEO1394_BUFFER_READY:
1144 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1145 return 0;
1146 case VIDEO1394_BUFFER_QUEUED:
1147 wait_event_interruptible(d->waitq,
1148 (d->buffer_status[v.buffer] == VIDEO1394_BUFFER_READY));
1149 if (signal_pending(current))
1150 return -EINTR;
1151 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1152 return 0;
1153 default:
1154 PRINT(KERN_ERR, ohci->host->id,
1155 "Buffer %d is not queued",v.buffer);
1156 return -ESRCH;
1157 }
1158 }
1159 default:
1160 return -ENOTTY;
1161 }
1162 }
1163
1164 static long video1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1165 {
1166 int err;
1167 lock_kernel();
1168 err = __video1394_ioctl(file, cmd, arg);
1169 unlock_kernel();
1170 return err;
1171 }
1172
1173 /*
1174 * This maps the vmalloced and reserved buffer to user space.
1175 *
1176 * FIXME:
1177 * - PAGE_READONLY should suffice!?
1178 * - remap_pfn_range is kind of inefficient for page by page remapping.
1179 * But e.g. pte_alloc() does not work in modules ... :-(
1180 */
1181
1182 static int video1394_mmap(struct file *file, struct vm_area_struct *vma)
1183 {
1184 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1185 int res = -EINVAL;
1186
1187 lock_kernel();
1188 if (ctx->current_ctx == NULL) {
1189 PRINT(KERN_ERR, ctx->ohci->host->id, "Current iso context not set");
1190 } else
1191 res = dma_region_mmap(&ctx->current_ctx->dma, file, vma);
1192 unlock_kernel();
1193
1194 return res;
1195 }
1196
1197 static int video1394_open(struct inode *inode, struct file *file)
1198 {
1199 int i = ieee1394_file_to_instance(file);
1200 struct ti_ohci *ohci;
1201 struct file_ctx *ctx;
1202
1203 ohci = hpsb_get_hostinfo_bykey(&video1394_highlevel, i);
1204 if (ohci == NULL)
1205 return -EIO;
1206
1207 ctx = kmalloc(sizeof(struct file_ctx), GFP_KERNEL);
1208 if (ctx == NULL) {
1209 PRINT(KERN_ERR, ohci->host->id, "Cannot malloc file_ctx");
1210 return -ENOMEM;
1211 }
1212
1213 memset(ctx, 0, sizeof(struct file_ctx));
1214 ctx->ohci = ohci;
1215 INIT_LIST_HEAD(&ctx->context_list);
1216 ctx->current_ctx = NULL;
1217 file->private_data = ctx;
1218
1219 return 0;
1220 }
1221
1222 static int video1394_release(struct inode *inode, struct file *file)
1223 {
1224 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1225 struct ti_ohci *ohci = ctx->ohci;
1226 struct list_head *lh, *next;
1227 u64 mask;
1228
1229 lock_kernel();
1230 list_for_each_safe(lh, next, &ctx->context_list) {
1231 struct dma_iso_ctx *d;
1232 d = list_entry(lh, struct dma_iso_ctx, link);
1233 mask = (u64) 1 << d->channel;
1234
1235 if (!(ohci->ISO_channel_usage & mask))
1236 PRINT(KERN_ERR, ohci->host->id, "On release: Channel %d "
1237 "is not being used", d->channel);
1238 else
1239 ohci->ISO_channel_usage &= ~mask;
1240 PRINT(KERN_INFO, ohci->host->id, "On release: Iso %s context "
1241 "%d stop listening on channel %d",
1242 d->type == OHCI_ISO_RECEIVE ? "receive" : "transmit",
1243 d->ctx, d->channel);
1244 free_dma_iso_ctx(d);
1245 }
1246
1247 kfree(ctx);
1248 file->private_data = NULL;
1249
1250 unlock_kernel();
1251 return 0;
1252 }
1253
1254 #ifdef CONFIG_COMPAT
1255 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
1256 #endif
1257
1258 static struct cdev video1394_cdev;
1259 static struct file_operations video1394_fops=
1260 {
1261 .owner = THIS_MODULE,
1262 .unlocked_ioctl = video1394_ioctl,
1263 #ifdef CONFIG_COMPAT
1264 .compat_ioctl = video1394_compat_ioctl,
1265 #endif
1266 .mmap = video1394_mmap,
1267 .open = video1394_open,
1268 .release = video1394_release
1269 };
1270
1271 /*** HOTPLUG STUFF **********************************************************/
1272 /*
1273 * Export information about protocols/devices supported by this driver.
1274 */
1275 static struct ieee1394_device_id video1394_id_table[] = {
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 & 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 + 1) & 0xffffff
1285 },
1286 {
1287 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1288 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1289 .version = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff
1290 },
1291 { }
1292 };
1293
1294 MODULE_DEVICE_TABLE(ieee1394, video1394_id_table);
1295
1296 static struct hpsb_protocol_driver video1394_driver = {
1297 .name = "1394 Digital Camera Driver",
1298 .id_table = video1394_id_table,
1299 .driver = {
1300 .name = VIDEO1394_DRIVER_NAME,
1301 .bus = &ieee1394_bus_type,
1302 },
1303 };
1304
1305
1306 static void video1394_add_host (struct hpsb_host *host)
1307 {
1308 struct ti_ohci *ohci;
1309 int minor;
1310
1311 /* We only work with the OHCI-1394 driver */
1312 if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME))
1313 return;
1314
1315 ohci = (struct ti_ohci *)host->hostdata;
1316
1317 if (!hpsb_create_hostinfo(&video1394_highlevel, host, 0)) {
1318 PRINT(KERN_ERR, ohci->host->id, "Cannot allocate hostinfo");
1319 return;
1320 }
1321
1322 hpsb_set_hostinfo(&video1394_highlevel, host, ohci);
1323 hpsb_set_hostinfo_key(&video1394_highlevel, host, ohci->host->id);
1324
1325 minor = IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id;
1326 class_simple_device_add(hpsb_protocol_class, MKDEV(
1327 IEEE1394_MAJOR, minor),
1328 NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1329 devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor),
1330 S_IFCHR | S_IRUSR | S_IWUSR,
1331 "%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1332 }
1333
1334
1335 static void video1394_remove_host (struct hpsb_host *host)
1336 {
1337 struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
1338
1339 if (ohci) {
1340 class_simple_device_remove(MKDEV(IEEE1394_MAJOR,
1341 IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
1342 devfs_remove("%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1343 }
1344
1345 return;
1346 }
1347
1348
1349 static struct hpsb_highlevel video1394_highlevel = {
1350 .name = VIDEO1394_DRIVER_NAME,
1351 .add_host = video1394_add_host,
1352 .remove_host = video1394_remove_host,
1353 };
1354
1355 MODULE_AUTHOR("Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>");
1356 MODULE_DESCRIPTION("driver for digital video on OHCI board");
1357 MODULE_SUPPORTED_DEVICE(VIDEO1394_DRIVER_NAME);
1358 MODULE_LICENSE("GPL");
1359
1360 #ifdef CONFIG_COMPAT
1361
1362 #define VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER \
1363 _IOW ('#', 0x12, struct video1394_wait32)
1364 #define VIDEO1394_IOC32_LISTEN_WAIT_BUFFER \
1365 _IOWR('#', 0x13, struct video1394_wait32)
1366 #define VIDEO1394_IOC32_TALK_WAIT_BUFFER \
1367 _IOW ('#', 0x17, struct video1394_wait32)
1368 #define VIDEO1394_IOC32_LISTEN_POLL_BUFFER \
1369 _IOWR('#', 0x18, struct video1394_wait32)
1370
1371 struct video1394_wait32 {
1372 u32 channel;
1373 u32 buffer;
1374 struct compat_timeval filltime;
1375 };
1376
1377 static int video1394_wr_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1378 {
1379 struct video1394_wait32 __user *argp = (void __user *)arg;
1380 struct video1394_wait32 wait32;
1381 struct video1394_wait wait;
1382 mm_segment_t old_fs;
1383 int ret;
1384
1385 if (copy_from_user(&wait32, argp, sizeof(wait32)))
1386 return -EFAULT;
1387
1388 wait.channel = wait32.channel;
1389 wait.buffer = wait32.buffer;
1390 wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1391 wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1392
1393 old_fs = get_fs();
1394 set_fs(KERNEL_DS);
1395 if (cmd == VIDEO1394_IOC32_LISTEN_WAIT_BUFFER)
1396 ret = video1394_ioctl(file,
1397 VIDEO1394_IOC_LISTEN_WAIT_BUFFER,
1398 (unsigned long) &wait);
1399 else
1400 ret = video1394_ioctl(file,
1401 VIDEO1394_IOC_LISTEN_POLL_BUFFER,
1402 (unsigned long) &wait);
1403 set_fs(old_fs);
1404
1405 if (!ret) {
1406 wait32.channel = wait.channel;
1407 wait32.buffer = wait.buffer;
1408 wait32.filltime.tv_sec = (int)wait.filltime.tv_sec;
1409 wait32.filltime.tv_usec = (int)wait.filltime.tv_usec;
1410
1411 if (copy_to_user(argp, &wait32, sizeof(wait32)))
1412 ret = -EFAULT;
1413 }
1414
1415 return ret;
1416 }
1417
1418 static int video1394_w_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1419 {
1420 struct video1394_wait32 wait32;
1421 struct video1394_wait wait;
1422 mm_segment_t old_fs;
1423 int ret;
1424
1425 if (copy_from_user(&wait32, (void __user *)arg, sizeof(wait32)))
1426 return -EFAULT;
1427
1428 wait.channel = wait32.channel;
1429 wait.buffer = wait32.buffer;
1430 wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1431 wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1432
1433 old_fs = get_fs();
1434 set_fs(KERNEL_DS);
1435 if (cmd == VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER)
1436 ret = video1394_ioctl(file,
1437 VIDEO1394_IOC_LISTEN_QUEUE_BUFFER,
1438 (unsigned long) &wait);
1439 else
1440 ret = video1394_ioctl(file,
1441 VIDEO1394_IOC_TALK_WAIT_BUFFER,
1442 (unsigned long) &wait);
1443 set_fs(old_fs);
1444
1445 return ret;
1446 }
1447
1448 static int video1394_queue_buf32(struct file *file, unsigned int cmd, unsigned long arg)
1449 {
1450 return -EFAULT; /* ??? was there before. */
1451
1452 return video1394_ioctl(file,
1453 VIDEO1394_IOC_TALK_QUEUE_BUFFER, arg);
1454 }
1455
1456 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
1457 {
1458 switch (cmd) {
1459 case VIDEO1394_IOC_LISTEN_CHANNEL:
1460 case VIDEO1394_IOC_UNLISTEN_CHANNEL:
1461 case VIDEO1394_IOC_TALK_CHANNEL:
1462 case VIDEO1394_IOC_UNTALK_CHANNEL:
1463 return video1394_ioctl(f, cmd, arg);
1464
1465 case VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER:
1466 return video1394_w_wait32(f, cmd, arg);
1467 case VIDEO1394_IOC32_LISTEN_WAIT_BUFFER:
1468 return video1394_wr_wait32(f, cmd, arg);
1469 case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1470 return video1394_queue_buf32(f, cmd, arg);
1471 case VIDEO1394_IOC32_TALK_WAIT_BUFFER:
1472 return video1394_w_wait32(f, cmd, arg);
1473 case VIDEO1394_IOC32_LISTEN_POLL_BUFFER:
1474 return video1394_wr_wait32(f, cmd, arg);
1475 default:
1476 return -ENOIOCTLCMD;
1477 }
1478 }
1479
1480 #endif /* CONFIG_COMPAT */
1481
1482 static void __exit video1394_exit_module (void)
1483 {
1484 hpsb_unregister_protocol(&video1394_driver);
1485
1486 hpsb_unregister_highlevel(&video1394_highlevel);
1487
1488 devfs_remove(VIDEO1394_DRIVER_NAME);
1489 cdev_del(&video1394_cdev);
1490
1491 PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
1492 }
1493
1494 static int __init video1394_init_module (void)
1495 {
1496 int ret;
1497
1498 cdev_init(&video1394_cdev, &video1394_fops);
1499 video1394_cdev.owner = THIS_MODULE;
1500 kobject_set_name(&video1394_cdev.kobj, VIDEO1394_DRIVER_NAME);
1501 ret = cdev_add(&video1394_cdev, IEEE1394_VIDEO1394_DEV, 16);
1502 if (ret) {
1503 PRINT_G(KERN_ERR, "video1394: unable to get minor device block");
1504 return ret;
1505 }
1506
1507 devfs_mk_dir(VIDEO1394_DRIVER_NAME);
1508
1509 hpsb_register_highlevel(&video1394_highlevel);
1510
1511 ret = hpsb_register_protocol(&video1394_driver);
1512 if (ret) {
1513 PRINT_G(KERN_ERR, "video1394: failed to register protocol");
1514 hpsb_unregister_highlevel(&video1394_highlevel);
1515 devfs_remove(VIDEO1394_DRIVER_NAME);
1516 cdev_del(&video1394_cdev);
1517 return ret;
1518 }
1519
1520 PRINT_G(KERN_INFO, "Installed " VIDEO1394_DRIVER_NAME " module");
1521 return 0;
1522 }
1523
1524
1525 module_init(video1394_init_module);
1526 module_exit(video1394_exit_module);
1527 MODULE_ALIAS_CHARDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_VIDEO1394 * 16);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree