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cpuset: fix possible deadlock in async_rebuild_sched_domains
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ieee1394 / video1394.c
blob679a918a5cc76eae41500b458eef93cc2c06992a
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/kernel.h>
32 #include <linux/list.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/wait.h>
36 #include <linux/errno.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/pci.h>
40 #include <linux/fs.h>
41 #include <linux/poll.h>
42 #include <linux/delay.h>
43 #include <linux/bitops.h>
44 #include <linux/types.h>
45 #include <linux/vmalloc.h>
46 #include <linux/timex.h>
47 #include <linux/mm.h>
48 #include <linux/compat.h>
49 #include <linux/cdev.h>
50
51 #include "dma.h"
52 #include "highlevel.h"
53 #include "hosts.h"
54 #include "ieee1394.h"
55 #include "ieee1394_core.h"
56 #include "ieee1394_hotplug.h"
57 #include "ieee1394_types.h"
58 #include "nodemgr.h"
59 #include "ohci1394.h"
60 #include "video1394.h"
61
62 #define ISO_CHANNELS 64
63
64 struct it_dma_prg {
65 struct dma_cmd begin;
66 quadlet_t data[4];
67 struct dma_cmd end;
68 quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
69 };
70
71 struct dma_iso_ctx {
72 struct ti_ohci *ohci;
73 int type; /* OHCI_ISO_TRANSMIT or OHCI_ISO_RECEIVE */
74 struct ohci1394_iso_tasklet iso_tasklet;
75 int channel;
76 int ctx;
77 int last_buffer;
78 int * next_buffer; /* For ISO Transmit of video packets
79 to write the correct SYT field
80 into the next block */
81 unsigned int num_desc;
82 unsigned int buf_size;
83 unsigned int frame_size;
84 unsigned int packet_size;
85 unsigned int left_size;
86 unsigned int nb_cmd;
87
88 struct dma_region dma;
89
90 struct dma_prog_region *prg_reg;
91
92 struct dma_cmd **ir_prg;
93 struct it_dma_prg **it_prg;
94
95 unsigned int *buffer_status;
96 unsigned int *buffer_prg_assignment;
97 struct timeval *buffer_time; /* time when the buffer was received */
98 unsigned int *last_used_cmd; /* For ISO Transmit with
99 variable sized packets only ! */
100 int ctrlClear;
101 int ctrlSet;
102 int cmdPtr;
103 int ctxMatch;
104 wait_queue_head_t waitq;
105 spinlock_t lock;
106 unsigned int syt_offset;
107 int flags;
108
109 struct list_head link;
110 };
111
112
113 struct file_ctx {
114 struct ti_ohci *ohci;
115 struct list_head context_list;
116 struct dma_iso_ctx *current_ctx;
117 };
118
119 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
120 #define VIDEO1394_DEBUG
121 #endif
122
123 #ifdef DBGMSG
124 #undef DBGMSG
125 #endif
126
127 #ifdef VIDEO1394_DEBUG
128 #define DBGMSG(card, fmt, args...) \
129 printk(KERN_INFO "video1394_%d: " fmt "\n" , card , ## args)
130 #else
131 #define DBGMSG(card, fmt, args...) do {} while (0)
132 #endif
133
134 /* print general (card independent) information */
135 #define PRINT_G(level, fmt, args...) \
136 printk(level "video1394: " fmt "\n" , ## args)
137
138 /* print card specific information */
139 #define PRINT(level, card, fmt, args...) \
140 printk(level "video1394_%d: " fmt "\n" , card , ## args)
141
142 static void wakeup_dma_ir_ctx(unsigned long l);
143 static void wakeup_dma_it_ctx(unsigned long l);
144
145 static struct hpsb_highlevel video1394_highlevel;
146
147 static int free_dma_iso_ctx(struct dma_iso_ctx *d)
148 {
149 int i;
150
151 DBGMSG(d->ohci->host->id, "Freeing dma_iso_ctx %d", d->ctx);
152
153 ohci1394_stop_context(d->ohci, d->ctrlClear, NULL);
154 if (d->iso_tasklet.link.next != NULL)
155 ohci1394_unregister_iso_tasklet(d->ohci, &d->iso_tasklet);
156
157 dma_region_free(&d->dma);
158
159 if (d->prg_reg) {
160 for (i = 0; i < d->num_desc; i++)
161 dma_prog_region_free(&d->prg_reg[i]);
162 kfree(d->prg_reg);
163 }
164
165 kfree(d->ir_prg);
166 kfree(d->it_prg);
167 kfree(d->buffer_status);
168 kfree(d->buffer_prg_assignment);
169 kfree(d->buffer_time);
170 kfree(d->last_used_cmd);
171 kfree(d->next_buffer);
172 list_del(&d->link);
173 kfree(d);
174
175 return 0;
176 }
177
178 static struct dma_iso_ctx *
179 alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int num_desc,
180 int buf_size, int channel, unsigned int packet_size)
181 {
182 struct dma_iso_ctx *d;
183 int i;
184
185 d = kzalloc(sizeof(*d), GFP_KERNEL);
186 if (!d) {
187 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma_iso_ctx");
188 return NULL;
189 }
190
191 d->ohci = ohci;
192 d->type = type;
193 d->channel = channel;
194 d->num_desc = num_desc;
195 d->frame_size = buf_size;
196 d->buf_size = PAGE_ALIGN(buf_size);
197 d->last_buffer = -1;
198 INIT_LIST_HEAD(&d->link);
199 init_waitqueue_head(&d->waitq);
200
201 /* Init the regions for easy cleanup */
202 dma_region_init(&d->dma);
203
204 if (dma_region_alloc(&d->dma, (d->num_desc - 1) * d->buf_size, ohci->dev,
205 PCI_DMA_BIDIRECTIONAL)) {
206 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma buffer");
207 free_dma_iso_ctx(d);
208 return NULL;
209 }
210
211 if (type == OHCI_ISO_RECEIVE)
212 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
213 wakeup_dma_ir_ctx,
214 (unsigned long) d);
215 else
216 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
217 wakeup_dma_it_ctx,
218 (unsigned long) d);
219
220 if (ohci1394_register_iso_tasklet(ohci, &d->iso_tasklet) < 0) {
221 PRINT(KERN_ERR, ohci->host->id, "no free iso %s contexts",
222 type == OHCI_ISO_RECEIVE ? "receive" : "transmit");
223 free_dma_iso_ctx(d);
224 return NULL;
225 }
226 d->ctx = d->iso_tasklet.context;
227
228 d->prg_reg = kmalloc(d->num_desc * sizeof(*d->prg_reg), GFP_KERNEL);
229 if (!d->prg_reg) {
230 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate ir prg regs");
231 free_dma_iso_ctx(d);
232 return NULL;
233 }
234 /* Makes for easier cleanup */
235 for (i = 0; i < d->num_desc; i++)
236 dma_prog_region_init(&d->prg_reg[i]);
237
238 if (type == OHCI_ISO_RECEIVE) {
239 d->ctrlSet = OHCI1394_IsoRcvContextControlSet+32*d->ctx;
240 d->ctrlClear = OHCI1394_IsoRcvContextControlClear+32*d->ctx;
241 d->cmdPtr = OHCI1394_IsoRcvCommandPtr+32*d->ctx;
242 d->ctxMatch = OHCI1394_IsoRcvContextMatch+32*d->ctx;
243
244 d->ir_prg = kzalloc(d->num_desc * sizeof(*d->ir_prg),
245 GFP_KERNEL);
246
247 if (!d->ir_prg) {
248 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
249 free_dma_iso_ctx(d);
250 return NULL;
251 }
252
253 d->nb_cmd = d->buf_size / PAGE_SIZE + 1;
254 d->left_size = (d->frame_size % PAGE_SIZE) ?
255 d->frame_size % PAGE_SIZE : PAGE_SIZE;
256
257 for (i = 0;i < d->num_desc; i++) {
258 if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
259 sizeof(struct dma_cmd), ohci->dev)) {
260 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
261 free_dma_iso_ctx(d);
262 return NULL;
263 }
264 d->ir_prg[i] = (struct dma_cmd *)d->prg_reg[i].kvirt;
265 }
266
267 } else { /* OHCI_ISO_TRANSMIT */
268 d->ctrlSet = OHCI1394_IsoXmitContextControlSet+16*d->ctx;
269 d->ctrlClear = OHCI1394_IsoXmitContextControlClear+16*d->ctx;
270 d->cmdPtr = OHCI1394_IsoXmitCommandPtr+16*d->ctx;
271
272 d->it_prg = kzalloc(d->num_desc * sizeof(*d->it_prg),
273 GFP_KERNEL);
274
275 if (!d->it_prg) {
276 PRINT(KERN_ERR, ohci->host->id,
277 "Failed to allocate dma it prg");
278 free_dma_iso_ctx(d);
279 return NULL;
280 }
281
282 d->packet_size = packet_size;
283
284 if (PAGE_SIZE % packet_size || packet_size>4096) {
285 PRINT(KERN_ERR, ohci->host->id,
286 "Packet size %d (page_size: %ld) "
287 "not yet supported\n",
288 packet_size, PAGE_SIZE);
289 free_dma_iso_ctx(d);
290 return NULL;
291 }
292
293 d->nb_cmd = d->frame_size / d->packet_size;
294 if (d->frame_size % d->packet_size) {
295 d->nb_cmd++;
296 d->left_size = d->frame_size % d->packet_size;
297 } else
298 d->left_size = d->packet_size;
299
300 for (i = 0; i < d->num_desc; i++) {
301 if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
302 sizeof(struct it_dma_prg), ohci->dev)) {
303 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma it prg");
304 free_dma_iso_ctx(d);
305 return NULL;
306 }
307 d->it_prg[i] = (struct it_dma_prg *)d->prg_reg[i].kvirt;
308 }
309 }
310
311 d->buffer_status =
312 kzalloc(d->num_desc * sizeof(*d->buffer_status), GFP_KERNEL);
313 d->buffer_prg_assignment =
314 kzalloc(d->num_desc * sizeof(*d->buffer_prg_assignment), GFP_KERNEL);
315 d->buffer_time =
316 kzalloc(d->num_desc * sizeof(*d->buffer_time), GFP_KERNEL);
317 d->last_used_cmd =
318 kzalloc(d->num_desc * sizeof(*d->last_used_cmd), GFP_KERNEL);
319 d->next_buffer =
320 kzalloc(d->num_desc * sizeof(*d->next_buffer), GFP_KERNEL);
321
322 if (!d->buffer_status || !d->buffer_prg_assignment || !d->buffer_time ||
323 !d->last_used_cmd || !d->next_buffer) {
324 PRINT(KERN_ERR, ohci->host->id,
325 "Failed to allocate dma_iso_ctx member");
326 free_dma_iso_ctx(d);
327 return NULL;
328 }
329
330 spin_lock_init(&d->lock);
331
332 DBGMSG(ohci->host->id, "Iso %s DMA: %d buffers "
333 "of size %d allocated for a frame size %d, each with %d prgs",
334 (type == OHCI_ISO_RECEIVE) ? "receive" : "transmit",
335 d->num_desc - 1, d->buf_size, d->frame_size, d->nb_cmd);
336
337 return d;
338 }
339
340 static void reset_ir_status(struct dma_iso_ctx *d, int n)
341 {
342 int i;
343 d->ir_prg[n][0].status = cpu_to_le32(4);
344 d->ir_prg[n][1].status = cpu_to_le32(PAGE_SIZE-4);
345 for (i = 2; i < d->nb_cmd - 1; i++)
346 d->ir_prg[n][i].status = cpu_to_le32(PAGE_SIZE);
347 d->ir_prg[n][i].status = cpu_to_le32(d->left_size);
348 }
349
350 static void reprogram_dma_ir_prg(struct dma_iso_ctx *d, int n, int buffer, int flags)
351 {
352 struct dma_cmd *ir_prg = d->ir_prg[n];
353 unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
354 int i;
355
356 d->buffer_prg_assignment[n] = buffer;
357
358 ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
359 (unsigned long)d->dma.kvirt));
360 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
361 (buf + 4) - (unsigned long)d->dma.kvirt));
362
363 for (i=2;i<d->nb_cmd-1;i++) {
364 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
365 (buf+(i-1)*PAGE_SIZE) -
366 (unsigned long)d->dma.kvirt));
367 }
368
369 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
370 DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
371 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
372 (buf+(i-1)*PAGE_SIZE) - (unsigned long)d->dma.kvirt));
373 }
374
375 static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
376 {
377 struct dma_cmd *ir_prg = d->ir_prg[n];
378 struct dma_prog_region *ir_reg = &d->prg_reg[n];
379 unsigned long buf = (unsigned long)d->dma.kvirt;
380 int i;
381
382 /* the first descriptor will read only 4 bytes */
383 ir_prg[0].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
384 DMA_CTL_BRANCH | 4);
385
386 /* set the sync flag */
387 if (flags & VIDEO1394_SYNC_FRAMES)
388 ir_prg[0].control |= cpu_to_le32(DMA_CTL_WAIT);
389
390 ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
391 (unsigned long)d->dma.kvirt));
392 ir_prg[0].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
393 1 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
394
395 /* If there is *not* only one DMA page per frame (hence, d->nb_cmd==2) */
396 if (d->nb_cmd > 2) {
397 /* The second descriptor will read PAGE_SIZE-4 bytes */
398 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
399 DMA_CTL_BRANCH | (PAGE_SIZE-4));
400 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf + 4) -
401 (unsigned long)d->dma.kvirt));
402 ir_prg[1].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
403 2 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
404
405 for (i = 2; i < d->nb_cmd - 1; i++) {
406 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
407 DMA_CTL_BRANCH | PAGE_SIZE);
408 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
409 (buf+(i-1)*PAGE_SIZE) -
410 (unsigned long)d->dma.kvirt));
411
412 ir_prg[i].branchAddress =
413 cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
414 (i + 1) * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
415 }
416
417 /* The last descriptor will generate an interrupt */
418 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
419 DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
420 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
421 (buf+(i-1)*PAGE_SIZE) -
422 (unsigned long)d->dma.kvirt));
423 } else {
424 /* Only one DMA page is used. Read d->left_size immediately and */
425 /* generate an interrupt as this is also the last page. */
426 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
427 DMA_CTL_IRQ | DMA_CTL_BRANCH | (d->left_size-4));
428 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
429 (buf + 4) - (unsigned long)d->dma.kvirt));
430 }
431 }
432
433 static void initialize_dma_ir_ctx(struct dma_iso_ctx *d, int tag, int flags)
434 {
435 struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
436 int i;
437
438 d->flags = flags;
439
440 ohci1394_stop_context(ohci, d->ctrlClear, NULL);
441
442 for (i=0;i<d->num_desc;i++) {
443 initialize_dma_ir_prg(d, i, flags);
444 reset_ir_status(d, i);
445 }
446
447 /* reset the ctrl register */
448 reg_write(ohci, d->ctrlClear, 0xf0000000);
449
450 /* Set bufferFill */
451 reg_write(ohci, d->ctrlSet, 0x80000000);
452
453 /* Set isoch header */
454 if (flags & VIDEO1394_INCLUDE_ISO_HEADERS)
455 reg_write(ohci, d->ctrlSet, 0x40000000);
456
457 /* Set the context match register to match on all tags,
458 sync for sync tag, and listen to d->channel */
459 reg_write(ohci, d->ctxMatch, 0xf0000000|((tag&0xf)<<8)|d->channel);
460
461 /* Set up isoRecvIntMask to generate interrupts */
462 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1<<d->ctx);
463 }
464
465 /* find which context is listening to this channel */
466 static struct dma_iso_ctx *
467 find_ctx(struct list_head *list, int type, int channel)
468 {
469 struct dma_iso_ctx *ctx;
470
471 list_for_each_entry(ctx, list, link) {
472 if (ctx->type == type && ctx->channel == channel)
473 return ctx;
474 }
475
476 return NULL;
477 }
478
479 static void wakeup_dma_ir_ctx(unsigned long l)
480 {
481 struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
482 int i;
483
484 spin_lock(&d->lock);
485
486 for (i = 0; i < d->num_desc; i++) {
487 if (d->ir_prg[i][d->nb_cmd-1].status & cpu_to_le32(0xFFFF0000)) {
488 reset_ir_status(d, i);
489 d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
490 do_gettimeofday(&d->buffer_time[d->buffer_prg_assignment[i]]);
491 dma_region_sync_for_cpu(&d->dma,
492 d->buffer_prg_assignment[i] * d->buf_size,
493 d->buf_size);
494 }
495 }
496
497 spin_unlock(&d->lock);
498
499 if (waitqueue_active(&d->waitq))
500 wake_up_interruptible(&d->waitq);
501 }
502
503 static inline void put_timestamp(struct ti_ohci *ohci, struct dma_iso_ctx * d,
504 int n)
505 {
506 unsigned char* buf = d->dma.kvirt + n * d->buf_size;
507 u32 cycleTimer;
508 u32 timeStamp;
509
510 if (n == -1) {
511 return;
512 }
513
514 cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
515
516 timeStamp = ((cycleTimer & 0x0fff) + d->syt_offset); /* 11059 = 450 us */
517 timeStamp = (timeStamp % 3072 + ((timeStamp / 3072) << 12)
518 + (cycleTimer & 0xf000)) & 0xffff;
519
520 buf[6] = timeStamp >> 8;
521 buf[7] = timeStamp & 0xff;
522
523 /* if first packet is empty packet, then put timestamp into the next full one too */
524 if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
525 buf += d->packet_size;
526 buf[6] = timeStamp >> 8;
527 buf[7] = timeStamp & 0xff;
528 }
529
530 /* do the next buffer frame too in case of irq latency */
531 n = d->next_buffer[n];
532 if (n == -1) {
533 return;
534 }
535 buf = d->dma.kvirt + n * d->buf_size;
536
537 timeStamp += (d->last_used_cmd[n] << 12) & 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 #if 0
550 printk("curr: %d, next: %d, cycleTimer: %08x timeStamp: %08x\n",
551 curr, n, cycleTimer, timeStamp);
552 #endif
553 }
554
555 static void wakeup_dma_it_ctx(unsigned long l)
556 {
557 struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
558 struct ti_ohci *ohci = d->ohci;
559 int i;
560
561 spin_lock(&d->lock);
562
563 for (i = 0; i < d->num_desc; i++) {
564 if (d->it_prg[i][d->last_used_cmd[i]].end.status &
565 cpu_to_le32(0xFFFF0000)) {
566 int next = d->next_buffer[i];
567 put_timestamp(ohci, d, next);
568 d->it_prg[i][d->last_used_cmd[i]].end.status = 0;
569 d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
570 }
571 }
572
573 spin_unlock(&d->lock);
574
575 if (waitqueue_active(&d->waitq))
576 wake_up_interruptible(&d->waitq);
577 }
578
579 static void reprogram_dma_it_prg(struct dma_iso_ctx *d, int n, int buffer)
580 {
581 struct it_dma_prg *it_prg = d->it_prg[n];
582 unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
583 int i;
584
585 d->buffer_prg_assignment[n] = buffer;
586 for (i=0;i<d->nb_cmd;i++) {
587 it_prg[i].end.address =
588 cpu_to_le32(dma_region_offset_to_bus(&d->dma,
589 (buf+i*d->packet_size) - (unsigned long)d->dma.kvirt));
590 }
591 }
592
593 static void initialize_dma_it_prg(struct dma_iso_ctx *d, int n, int sync_tag)
594 {
595 struct it_dma_prg *it_prg = d->it_prg[n];
596 struct dma_prog_region *it_reg = &d->prg_reg[n];
597 unsigned long buf = (unsigned long)d->dma.kvirt;
598 int i;
599 d->last_used_cmd[n] = d->nb_cmd - 1;
600 for (i=0;i<d->nb_cmd;i++) {
601
602 it_prg[i].begin.control = cpu_to_le32(DMA_CTL_OUTPUT_MORE |
603 DMA_CTL_IMMEDIATE | 8) ;
604 it_prg[i].begin.address = 0;
605
606 it_prg[i].begin.status = 0;
607
608 it_prg[i].data[0] = cpu_to_le32(
609 (IEEE1394_SPEED_100 << 16)
610 | (/* tag */ 1 << 14)
611 | (d->channel << 8)
612 | (TCODE_ISO_DATA << 4));
613 if (i==0) it_prg[i].data[0] |= cpu_to_le32(sync_tag);
614 it_prg[i].data[1] = cpu_to_le32(d->packet_size << 16);
615 it_prg[i].data[2] = 0;
616 it_prg[i].data[3] = 0;
617
618 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST |
619 DMA_CTL_BRANCH);
620 it_prg[i].end.address =
621 cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf+i*d->packet_size) -
622 (unsigned long)d->dma.kvirt));
623
624 if (i<d->nb_cmd-1) {
625 it_prg[i].end.control |= cpu_to_le32(d->packet_size);
626 it_prg[i].begin.branchAddress =
627 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
628 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
629 it_prg[i].end.branchAddress =
630 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
631 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
632 } else {
633 /* the last prg generates an interrupt */
634 it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
635 DMA_CTL_IRQ | d->left_size);
636 /* the last prg doesn't branch */
637 it_prg[i].begin.branchAddress = 0;
638 it_prg[i].end.branchAddress = 0;
639 }
640 it_prg[i].end.status = 0;
641 }
642 }
643
644 static void initialize_dma_it_prg_var_packet_queue(
645 struct dma_iso_ctx *d, int n, unsigned int * packet_sizes,
646 struct ti_ohci *ohci)
647 {
648 struct it_dma_prg *it_prg = d->it_prg[n];
649 struct dma_prog_region *it_reg = &d->prg_reg[n];
650 int i;
651
652 #if 0
653 if (n != -1) {
654 put_timestamp(ohci, d, n);
655 }
656 #endif
657 d->last_used_cmd[n] = d->nb_cmd - 1;
658
659 for (i = 0; i < d->nb_cmd; i++) {
660 unsigned int size;
661 if (packet_sizes[i] > d->packet_size) {
662 size = d->packet_size;
663 } else {
664 size = packet_sizes[i];
665 }
666 it_prg[i].data[1] = cpu_to_le32(size << 16);
667 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH);
668
669 if (i < d->nb_cmd-1 && packet_sizes[i+1] != 0) {
670 it_prg[i].end.control |= cpu_to_le32(size);
671 it_prg[i].begin.branchAddress =
672 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
673 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
674 it_prg[i].end.branchAddress =
675 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
676 sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
677 } else {
678 /* the last prg generates an interrupt */
679 it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
680 DMA_CTL_IRQ | size);
681 /* the last prg doesn't branch */
682 it_prg[i].begin.branchAddress = 0;
683 it_prg[i].end.branchAddress = 0;
684 d->last_used_cmd[n] = i;
685 break;
686 }
687 }
688 }
689
690 static void initialize_dma_it_ctx(struct dma_iso_ctx *d, int sync_tag,
691 unsigned int syt_offset, int flags)
692 {
693 struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
694 int i;
695
696 d->flags = flags;
697 d->syt_offset = (syt_offset == 0 ? 11000 : syt_offset);
698
699 ohci1394_stop_context(ohci, d->ctrlClear, NULL);
700
701 for (i=0;i<d->num_desc;i++)
702 initialize_dma_it_prg(d, i, sync_tag);
703
704 /* Set up isoRecvIntMask to generate interrupts */
705 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1<<d->ctx);
706 }
707
708 static inline unsigned video1394_buffer_state(struct dma_iso_ctx *d,
709 unsigned int buffer)
710 {
711 unsigned long flags;
712 unsigned int ret;
713 spin_lock_irqsave(&d->lock, flags);
714 ret = d->buffer_status[buffer];
715 spin_unlock_irqrestore(&d->lock, flags);
716 return ret;
717 }
718
719 static long video1394_ioctl(struct file *file,
720 unsigned int cmd, unsigned long arg)
721 {
722 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
723 struct ti_ohci *ohci = ctx->ohci;
724 unsigned long flags;
725 void __user *argp = (void __user *)arg;
726
727 switch(cmd)
728 {
729 case VIDEO1394_IOC_LISTEN_CHANNEL:
730 case VIDEO1394_IOC_TALK_CHANNEL:
731 {
732 struct video1394_mmap v;
733 u64 mask;
734 struct dma_iso_ctx *d;
735 int i;
736
737 if (copy_from_user(&v, argp, sizeof(v)))
738 return -EFAULT;
739
740 /* if channel < 0, find lowest available one */
741 if (v.channel < 0) {
742 mask = (u64)0x1;
743 for (i=0; ; i++) {
744 if (i == ISO_CHANNELS) {
745 PRINT(KERN_ERR, ohci->host->id,
746 "No free channel found");
747 return -EAGAIN;
748 }
749 if (!(ohci->ISO_channel_usage & mask)) {
750 v.channel = i;
751 PRINT(KERN_INFO, ohci->host->id, "Found free channel %d", i);
752 break;
753 }
754 mask = mask << 1;
755 }
756 } else if (v.channel >= ISO_CHANNELS) {
757 PRINT(KERN_ERR, ohci->host->id,
758 "Iso channel %d out of bounds", v.channel);
759 return -EINVAL;
760 } else {
761 mask = (u64)0x1<<v.channel;
762 }
763 DBGMSG(ohci->host->id, "mask: %08X%08X usage: %08X%08X\n",
764 (u32)(mask>>32),(u32)(mask&0xffffffff),
765 (u32)(ohci->ISO_channel_usage>>32),
766 (u32)(ohci->ISO_channel_usage&0xffffffff));
767 if (ohci->ISO_channel_usage & mask) {
768 PRINT(KERN_ERR, ohci->host->id,
769 "Channel %d is already taken", v.channel);
770 return -EBUSY;
771 }
772
773 if (v.buf_size == 0 || v.buf_size > VIDEO1394_MAX_SIZE) {
774 PRINT(KERN_ERR, ohci->host->id,
775 "Invalid %d length buffer requested",v.buf_size);
776 return -EINVAL;
777 }
778
779 if (v.nb_buffers == 0 || v.nb_buffers > VIDEO1394_MAX_SIZE) {
780 PRINT(KERN_ERR, ohci->host->id,
781 "Invalid %d buffers requested",v.nb_buffers);
782 return -EINVAL;
783 }
784
785 if (v.nb_buffers * v.buf_size > VIDEO1394_MAX_SIZE) {
786 PRINT(KERN_ERR, ohci->host->id,
787 "%d buffers of size %d bytes is too big",
788 v.nb_buffers, v.buf_size);
789 return -EINVAL;
790 }
791
792 if (cmd == VIDEO1394_IOC_LISTEN_CHANNEL) {
793 d = alloc_dma_iso_ctx(ohci, OHCI_ISO_RECEIVE,
794 v.nb_buffers + 1, v.buf_size,
795 v.channel, 0);
796
797 if (d == NULL) {
798 PRINT(KERN_ERR, ohci->host->id,
799 "Couldn't allocate ir context");
800 return -EAGAIN;
801 }
802 initialize_dma_ir_ctx(d, v.sync_tag, v.flags);
803
804 ctx->current_ctx = d;
805
806 v.buf_size = d->buf_size;
807 list_add_tail(&d->link, &ctx->context_list);
808
809 DBGMSG(ohci->host->id,
810 "iso context %d listen on channel %d",
811 d->ctx, v.channel);
812 }
813 else {
814 d = alloc_dma_iso_ctx(ohci, OHCI_ISO_TRANSMIT,
815 v.nb_buffers + 1, v.buf_size,
816 v.channel, v.packet_size);
817
818 if (d == NULL) {
819 PRINT(KERN_ERR, ohci->host->id,
820 "Couldn't allocate it context");
821 return -EAGAIN;
822 }
823 initialize_dma_it_ctx(d, v.sync_tag,
824 v.syt_offset, v.flags);
825
826 ctx->current_ctx = d;
827
828 v.buf_size = d->buf_size;
829
830 list_add_tail(&d->link, &ctx->context_list);
831
832 DBGMSG(ohci->host->id,
833 "Iso context %d talk on channel %d", d->ctx,
834 v.channel);
835 }
836
837 if (copy_to_user(argp, &v, sizeof(v))) {
838 /* FIXME : free allocated dma resources */
839 return -EFAULT;
840 }
841
842 ohci->ISO_channel_usage |= mask;
843
844 return 0;
845 }
846 case VIDEO1394_IOC_UNLISTEN_CHANNEL:
847 case VIDEO1394_IOC_UNTALK_CHANNEL:
848 {
849 int channel;
850 u64 mask;
851 struct dma_iso_ctx *d;
852
853 if (copy_from_user(&channel, argp, sizeof(int)))
854 return -EFAULT;
855
856 if (channel < 0 || channel >= ISO_CHANNELS) {
857 PRINT(KERN_ERR, ohci->host->id,
858 "Iso channel %d out of bound", channel);
859 return -EINVAL;
860 }
861 mask = (u64)0x1<<channel;
862 if (!(ohci->ISO_channel_usage & mask)) {
863 PRINT(KERN_ERR, ohci->host->id,
864 "Channel %d is not being used", channel);
865 return -ESRCH;
866 }
867
868 /* Mark this channel as unused */
869 ohci->ISO_channel_usage &= ~mask;
870
871 if (cmd == VIDEO1394_IOC_UNLISTEN_CHANNEL)
872 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, channel);
873 else
874 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, channel);
875
876 if (d == NULL) return -ESRCH;
877 DBGMSG(ohci->host->id, "Iso context %d "
878 "stop talking on channel %d", d->ctx, channel);
879 free_dma_iso_ctx(d);
880
881 return 0;
882 }
883 case VIDEO1394_IOC_LISTEN_QUEUE_BUFFER:
884 {
885 struct video1394_wait v;
886 struct dma_iso_ctx *d;
887 int next_prg;
888
889 if (unlikely(copy_from_user(&v, argp, sizeof(v))))
890 return -EFAULT;
891
892 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
893 if (unlikely(d == NULL))
894 return -EFAULT;
895
896 if (unlikely(v.buffer >= d->num_desc - 1)) {
897 PRINT(KERN_ERR, ohci->host->id,
898 "Buffer %d out of range",v.buffer);
899 return -EINVAL;
900 }
901
902 spin_lock_irqsave(&d->lock,flags);
903
904 if (unlikely(d->buffer_status[v.buffer]==VIDEO1394_BUFFER_QUEUED)) {
905 PRINT(KERN_ERR, ohci->host->id,
906 "Buffer %d is already used",v.buffer);
907 spin_unlock_irqrestore(&d->lock,flags);
908 return -EBUSY;
909 }
910
911 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
912
913 next_prg = (d->last_buffer + 1) % d->num_desc;
914 if (d->last_buffer>=0)
915 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress =
916 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 0)
917 & 0xfffffff0) | 0x1);
918
919 d->last_buffer = next_prg;
920 reprogram_dma_ir_prg(d, d->last_buffer, v.buffer, d->flags);
921
922 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress = 0;
923
924 spin_unlock_irqrestore(&d->lock,flags);
925
926 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
927 {
928 DBGMSG(ohci->host->id, "Starting iso DMA ctx=%d",d->ctx);
929
930 /* Tell the controller where the first program is */
931 reg_write(ohci, d->cmdPtr,
932 dma_prog_region_offset_to_bus(&d->prg_reg[d->last_buffer], 0) | 0x1);
933
934 /* Run IR context */
935 reg_write(ohci, d->ctrlSet, 0x8000);
936 }
937 else {
938 /* Wake up dma context if necessary */
939 if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
940 DBGMSG(ohci->host->id,
941 "Waking up iso dma ctx=%d", d->ctx);
942 reg_write(ohci, d->ctrlSet, 0x1000);
943 }
944 }
945 return 0;
946
947 }
948 case VIDEO1394_IOC_LISTEN_WAIT_BUFFER:
949 case VIDEO1394_IOC_LISTEN_POLL_BUFFER:
950 {
951 struct video1394_wait v;
952 struct dma_iso_ctx *d;
953 int i = 0;
954
955 if (unlikely(copy_from_user(&v, argp, sizeof(v))))
956 return -EFAULT;
957
958 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
959 if (unlikely(d == NULL))
960 return -EFAULT;
961
962 if (unlikely(v.buffer > d->num_desc - 1)) {
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
1003 /*
1004 * Look ahead to see how many more buffers have been received
1005 */
1006 i=0;
1007 while (d->buffer_status[(v.buffer+1)%(d->num_desc - 1)]==
1008 VIDEO1394_BUFFER_READY) {
1009 v.buffer=(v.buffer+1)%(d->num_desc - 1);
1010 i++;
1011 }
1012 spin_unlock_irqrestore(&d->lock, flags);
1013
1014 v.buffer=i;
1015 if (unlikely(copy_to_user(argp, &v, sizeof(v))))
1016 return -EFAULT;
1017
1018 return 0;
1019 }
1020 case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1021 {
1022 struct video1394_wait v;
1023 unsigned int *psizes = NULL;
1024 struct dma_iso_ctx *d;
1025 int next_prg;
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 >= d->num_desc - 1) {
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(*psizes);
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 /* last_buffer is last_prg */
1060 next_prg = (d->last_buffer + 1) % d->num_desc;
1061 if (d->buffer_status[v.buffer]!=VIDEO1394_BUFFER_FREE) {
1062 PRINT(KERN_ERR, ohci->host->id,
1063 "Buffer %d is already used",v.buffer);
1064 spin_unlock_irqrestore(&d->lock,flags);
1065 kfree(psizes);
1066 return -EBUSY;
1067 }
1068
1069 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1070 initialize_dma_it_prg_var_packet_queue(
1071 d, next_prg, psizes, 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[next_prg],
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[next_prg],
1085 0) & 0xfffffff0) | 0x3);
1086 d->next_buffer[d->last_buffer] = (v.buffer + 1) % (d->num_desc - 1);
1087 }
1088 d->last_buffer = next_prg;
1089 reprogram_dma_it_prg(d, d->last_buffer, v.buffer);
1090 d->next_buffer[d->last_buffer] = -1;
1091
1092 d->it_prg[d->last_buffer][d->last_used_cmd[d->last_buffer]].end.branchAddress = 0;
1093
1094 spin_unlock_irqrestore(&d->lock,flags);
1095
1096 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
1097 {
1098 DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
1099 d->ctx);
1100 put_timestamp(ohci, d, d->last_buffer);
1101 dma_region_sync_for_device(&d->dma,
1102 v.buffer * d->buf_size, d->buf_size);
1103
1104 /* Tell the controller where the first program is */
1105 reg_write(ohci, d->cmdPtr,
1106 dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 0) | 0x3);
1107
1108 /* Run IT context */
1109 reg_write(ohci, d->ctrlSet, 0x8000);
1110 }
1111 else {
1112 /* Wake up dma context if necessary */
1113 if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
1114 DBGMSG(ohci->host->id,
1115 "Waking up iso transmit dma ctx=%d",
1116 d->ctx);
1117 put_timestamp(ohci, d, d->last_buffer);
1118 dma_region_sync_for_device(&d->dma,
1119 v.buffer * d->buf_size, d->buf_size);
1120
1121 reg_write(ohci, d->ctrlSet, 0x1000);
1122 }
1123 }
1124
1125 kfree(psizes);
1126 return 0;
1127
1128 }
1129 case VIDEO1394_IOC_TALK_WAIT_BUFFER:
1130 {
1131 struct video1394_wait v;
1132 struct dma_iso_ctx *d;
1133
1134 if (copy_from_user(&v, argp, sizeof(v)))
1135 return -EFAULT;
1136
1137 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1138 if (d == NULL) return -EFAULT;
1139
1140 if (v.buffer >= d->num_desc - 1) {
1141 PRINT(KERN_ERR, ohci->host->id,
1142 "Buffer %d out of range",v.buffer);
1143 return -EINVAL;
1144 }
1145
1146 switch(d->buffer_status[v.buffer]) {
1147 case VIDEO1394_BUFFER_READY:
1148 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1149 return 0;
1150 case VIDEO1394_BUFFER_QUEUED:
1151 wait_event_interruptible(d->waitq,
1152 (d->buffer_status[v.buffer] == VIDEO1394_BUFFER_READY));
1153 if (signal_pending(current))
1154 return -EINTR;
1155 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1156 return 0;
1157 default:
1158 PRINT(KERN_ERR, ohci->host->id,
1159 "Buffer %d is not queued",v.buffer);
1160 return -ESRCH;
1161 }
1162 }
1163 default:
1164 return -ENOTTY;
1165 }
1166 }
1167
1168 /*
1169 * This maps the vmalloced and reserved buffer to user space.
1170 *
1171 * FIXME:
1172 * - PAGE_READONLY should suffice!?
1173 * - remap_pfn_range is kind of inefficient for page by page remapping.
1174 * But e.g. pte_alloc() does not work in modules ... :-(
1175 */
1176
1177 static int video1394_mmap(struct file *file, struct vm_area_struct *vma)
1178 {
1179 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1180
1181 if (ctx->current_ctx == NULL) {
1182 PRINT(KERN_ERR, ctx->ohci->host->id,
1183 "Current iso context not set");
1184 return -EINVAL;
1185 }
1186
1187 return dma_region_mmap(&ctx->current_ctx->dma, file, vma);
1188 }
1189
1190 static unsigned int video1394_poll(struct file *file, poll_table *pt)
1191 {
1192 struct file_ctx *ctx;
1193 unsigned int mask = 0;
1194 unsigned long flags;
1195 struct dma_iso_ctx *d;
1196 int i;
1197
1198 ctx = file->private_data;
1199 d = ctx->current_ctx;
1200 if (d == NULL) {
1201 PRINT(KERN_ERR, ctx->ohci->host->id,
1202 "Current iso context not set");
1203 return POLLERR;
1204 }
1205
1206 poll_wait(file, &d->waitq, pt);
1207
1208 spin_lock_irqsave(&d->lock, flags);
1209 for (i = 0; i < d->num_desc; i++) {
1210 if (d->buffer_status[i] == VIDEO1394_BUFFER_READY) {
1211 mask |= POLLIN | POLLRDNORM;
1212 break;
1213 }
1214 }
1215 spin_unlock_irqrestore(&d->lock, flags);
1216
1217 return mask;
1218 }
1219
1220 static int video1394_open(struct inode *inode, struct file *file)
1221 {
1222 int i = ieee1394_file_to_instance(file);
1223 struct ti_ohci *ohci;
1224 struct file_ctx *ctx;
1225
1226 ohci = hpsb_get_hostinfo_bykey(&video1394_highlevel, i);
1227 if (ohci == NULL)
1228 return -EIO;
1229
1230 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1231 if (!ctx) {
1232 PRINT(KERN_ERR, ohci->host->id, "Cannot malloc file_ctx");
1233 return -ENOMEM;
1234 }
1235
1236 ctx->ohci = ohci;
1237 INIT_LIST_HEAD(&ctx->context_list);
1238 ctx->current_ctx = NULL;
1239 file->private_data = ctx;
1240
1241 return 0;
1242 }
1243
1244 static int video1394_release(struct inode *inode, struct file *file)
1245 {
1246 struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1247 struct ti_ohci *ohci = ctx->ohci;
1248 struct list_head *lh, *next;
1249 u64 mask;
1250
1251 list_for_each_safe(lh, next, &ctx->context_list) {
1252 struct dma_iso_ctx *d;
1253 d = list_entry(lh, struct dma_iso_ctx, link);
1254 mask = (u64) 1 << d->channel;
1255
1256 if (!(ohci->ISO_channel_usage & mask))
1257 PRINT(KERN_ERR, ohci->host->id, "On release: Channel %d "
1258 "is not being used", d->channel);
1259 else
1260 ohci->ISO_channel_usage &= ~mask;
1261 DBGMSG(ohci->host->id, "On release: Iso %s context "
1262 "%d stop listening on channel %d",
1263 d->type == OHCI_ISO_RECEIVE ? "receive" : "transmit",
1264 d->ctx, d->channel);
1265 free_dma_iso_ctx(d);
1266 }
1267
1268 kfree(ctx);
1269 file->private_data = NULL;
1270
1271 return 0;
1272 }
1273
1274 #ifdef CONFIG_COMPAT
1275 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
1276 #endif
1277
1278 static struct cdev video1394_cdev;
1279 static const struct file_operations video1394_fops=
1280 {
1281 .owner = THIS_MODULE,
1282 .unlocked_ioctl = video1394_ioctl,
1283 #ifdef CONFIG_COMPAT
1284 .compat_ioctl = video1394_compat_ioctl,
1285 #endif
1286 .poll = video1394_poll,
1287 .mmap = video1394_mmap,
1288 .open = video1394_open,
1289 .release = video1394_release
1290 };
1291
1292 /*** HOTPLUG STUFF **********************************************************/
1293 /*
1294 * Export information about protocols/devices supported by this driver.
1295 */
1296 #ifdef MODULE
1297 static struct ieee1394_device_id video1394_id_table[] = {
1298 {
1299 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1300 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1301 .version = CAMERA_SW_VERSION_ENTRY & 0xffffff
1302 },
1303 {
1304 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1305 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1306 .version = (CAMERA_SW_VERSION_ENTRY + 1) & 0xffffff
1307 },
1308 {
1309 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1310 .specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1311 .version = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff
1312 },
1313 { }
1314 };
1315
1316 MODULE_DEVICE_TABLE(ieee1394, video1394_id_table);
1317 #endif /* MODULE */
1318
1319 static struct hpsb_protocol_driver video1394_driver = {
1320 .name = VIDEO1394_DRIVER_NAME,
1321 };
1322
1323
1324 static void video1394_add_host (struct hpsb_host *host)
1325 {
1326 struct ti_ohci *ohci;
1327 int minor;
1328
1329 /* We only work with the OHCI-1394 driver */
1330 if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME))
1331 return;
1332
1333 ohci = (struct ti_ohci *)host->hostdata;
1334
1335 if (!hpsb_create_hostinfo(&video1394_highlevel, host, 0)) {
1336 PRINT(KERN_ERR, ohci->host->id, "Cannot allocate hostinfo");
1337 return;
1338 }
1339
1340 hpsb_set_hostinfo(&video1394_highlevel, host, ohci);
1341 hpsb_set_hostinfo_key(&video1394_highlevel, host, ohci->host->id);
1342
1343 minor = IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id;
1344 device_create(hpsb_protocol_class, NULL, MKDEV(IEEE1394_MAJOR, minor),
1345 NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1346 }
1347
1348
1349 static void video1394_remove_host (struct hpsb_host *host)
1350 {
1351 struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
1352
1353 if (ohci)
1354 device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
1355 IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
1356 return;
1357 }
1358
1359
1360 static struct hpsb_highlevel video1394_highlevel = {
1361 .name = VIDEO1394_DRIVER_NAME,
1362 .add_host = video1394_add_host,
1363 .remove_host = video1394_remove_host,
1364 };
1365
1366 MODULE_AUTHOR("Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>");
1367 MODULE_DESCRIPTION("driver for digital video on OHCI board");
1368 MODULE_SUPPORTED_DEVICE(VIDEO1394_DRIVER_NAME);
1369 MODULE_LICENSE("GPL");
1370
1371 #ifdef CONFIG_COMPAT
1372
1373 #define VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER \
1374 _IOW ('#', 0x12, struct video1394_wait32)
1375 #define VIDEO1394_IOC32_LISTEN_WAIT_BUFFER \
1376 _IOWR('#', 0x13, struct video1394_wait32)
1377 #define VIDEO1394_IOC32_TALK_WAIT_BUFFER \
1378 _IOW ('#', 0x17, struct video1394_wait32)
1379 #define VIDEO1394_IOC32_LISTEN_POLL_BUFFER \
1380 _IOWR('#', 0x18, struct video1394_wait32)
1381
1382 struct video1394_wait32 {
1383 u32 channel;
1384 u32 buffer;
1385 struct compat_timeval filltime;
1386 };
1387
1388 static int video1394_wr_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1389 {
1390 struct video1394_wait32 __user *argp = (void __user *)arg;
1391 struct video1394_wait32 wait32;
1392 struct video1394_wait wait;
1393 mm_segment_t old_fs;
1394 int ret;
1395
1396 if (copy_from_user(&wait32, argp, sizeof(wait32)))
1397 return -EFAULT;
1398
1399 wait.channel = wait32.channel;
1400 wait.buffer = wait32.buffer;
1401 wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1402 wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1403
1404 old_fs = get_fs();
1405 set_fs(KERNEL_DS);
1406 if (cmd == VIDEO1394_IOC32_LISTEN_WAIT_BUFFER)
1407 ret = video1394_ioctl(file,
1408 VIDEO1394_IOC_LISTEN_WAIT_BUFFER,
1409 (unsigned long) &wait);
1410 else
1411 ret = video1394_ioctl(file,
1412 VIDEO1394_IOC_LISTEN_POLL_BUFFER,
1413 (unsigned long) &wait);
1414 set_fs(old_fs);
1415
1416 if (!ret) {
1417 wait32.channel = wait.channel;
1418 wait32.buffer = wait.buffer;
1419 wait32.filltime.tv_sec = (int)wait.filltime.tv_sec;
1420 wait32.filltime.tv_usec = (int)wait.filltime.tv_usec;
1421
1422 if (copy_to_user(argp, &wait32, sizeof(wait32)))
1423 ret = -EFAULT;
1424 }
1425
1426 return ret;
1427 }
1428
1429 static int video1394_w_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1430 {
1431 struct video1394_wait32 wait32;
1432 struct video1394_wait wait;
1433 mm_segment_t old_fs;
1434 int ret;
1435
1436 if (copy_from_user(&wait32, (void __user *)arg, sizeof(wait32)))
1437 return -EFAULT;
1438
1439 wait.channel = wait32.channel;
1440 wait.buffer = wait32.buffer;
1441 wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1442 wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1443
1444 old_fs = get_fs();
1445 set_fs(KERNEL_DS);
1446 if (cmd == VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER)
1447 ret = video1394_ioctl(file,
1448 VIDEO1394_IOC_LISTEN_QUEUE_BUFFER,
1449 (unsigned long) &wait);
1450 else
1451 ret = video1394_ioctl(file,
1452 VIDEO1394_IOC_TALK_WAIT_BUFFER,
1453 (unsigned long) &wait);
1454 set_fs(old_fs);
1455
1456 return ret;
1457 }
1458
1459 static int video1394_queue_buf32(struct file *file, unsigned int cmd, unsigned long arg)
1460 {
1461 return -EFAULT; /* ??? was there before. */
1462
1463 return video1394_ioctl(file,
1464 VIDEO1394_IOC_TALK_QUEUE_BUFFER, arg);
1465 }
1466
1467 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
1468 {
1469 switch (cmd) {
1470 case VIDEO1394_IOC_LISTEN_CHANNEL:
1471 case VIDEO1394_IOC_UNLISTEN_CHANNEL:
1472 case VIDEO1394_IOC_TALK_CHANNEL:
1473 case VIDEO1394_IOC_UNTALK_CHANNEL:
1474 return video1394_ioctl(f, cmd, arg);
1475
1476 case VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER:
1477 return video1394_w_wait32(f, cmd, arg);
1478 case VIDEO1394_IOC32_LISTEN_WAIT_BUFFER:
1479 return video1394_wr_wait32(f, cmd, arg);
1480 case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1481 return video1394_queue_buf32(f, cmd, arg);
1482 case VIDEO1394_IOC32_TALK_WAIT_BUFFER:
1483 return video1394_w_wait32(f, cmd, arg);
1484 case VIDEO1394_IOC32_LISTEN_POLL_BUFFER:
1485 return video1394_wr_wait32(f, cmd, arg);
1486 default:
1487 return -ENOIOCTLCMD;
1488 }
1489 }
1490
1491 #endif /* CONFIG_COMPAT */
1492
1493 static void __exit video1394_exit_module (void)
1494 {
1495 hpsb_unregister_protocol(&video1394_driver);
1496 hpsb_unregister_highlevel(&video1394_highlevel);
1497 cdev_del(&video1394_cdev);
1498 PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
1499 }
1500
1501 static int __init video1394_init_module (void)
1502 {
1503 int ret;
1504
1505 hpsb_init_highlevel(&video1394_highlevel);
1506
1507 cdev_init(&video1394_cdev, &video1394_fops);
1508 video1394_cdev.owner = THIS_MODULE;
1509 ret = cdev_add(&video1394_cdev, IEEE1394_VIDEO1394_DEV, 16);
1510 if (ret) {
1511 PRINT_G(KERN_ERR, "video1394: unable to get minor device block");
1512 return ret;
1513 }
1514
1515 hpsb_register_highlevel(&video1394_highlevel);
1516
1517 ret = hpsb_register_protocol(&video1394_driver);
1518 if (ret) {
1519 PRINT_G(KERN_ERR, "video1394: failed to register protocol");
1520 hpsb_unregister_highlevel(&video1394_highlevel);
1521 cdev_del(&video1394_cdev);
1522 return ret;
1523 }
1524
1525 PRINT_G(KERN_INFO, "Installed " VIDEO1394_DRIVER_NAME " module");
1526 return 0;
1527 }
1528
1529
1530 module_init(video1394_init_module);
1531 module_exit(video1394_exit_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree