23911da501549313be82bc0a38df0a45584aaa3a
[linux-2.6.git] / drivers / ieee1394 / video1394.c
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 /* Markus Tavenrath <speedygoo@speedygoo.de> :
39    - fixed checks for valid buffer-numbers in video1394_icotl
40    - changed the ways the dma prg's are used, now it's possible to use
41      even a single dma buffer
42 */
43 #include <linux/config.h>
44 #include <linux/kernel.h>
45 #include <linux/list.h>
46 #include <linux/slab.h>
47 #include <linux/interrupt.h>
48 #include <linux/wait.h>
49 #include <linux/errno.h>
50 #include <linux/module.h>
51 #include <linux/init.h>
52 #include <linux/pci.h>
53 #include <linux/fs.h>
54 #include <linux/poll.h>
55 #include <linux/smp_lock.h>
56 #include <linux/delay.h>
57 #include <linux/devfs_fs_kernel.h>
58 #include <linux/bitops.h>
59 #include <linux/types.h>
60 #include <linux/vmalloc.h>
61 #include <linux/timex.h>
62 #include <linux/mm.h>
63 #include <linux/ioctl32.h>
64 #include <linux/compat.h>
65 #include <linux/cdev.h>
66
67 #include "ieee1394.h"
68 #include "ieee1394_types.h"
69 #include "hosts.h"
70 #include "ieee1394_core.h"
71 #include "highlevel.h"
72 #include "video1394.h"
73 #include "nodemgr.h"
74 #include "dma.h"
75
76 #include "ohci1394.h"
77
78 #define ISO_CHANNELS 64
79
80 #ifndef virt_to_page
81 #define virt_to_page(x) MAP_NR(x)
82 #endif
83
84 #ifndef vmalloc_32
85 #define vmalloc_32(x) vmalloc(x)
86 #endif
87
88 struct it_dma_prg {
89         struct dma_cmd begin;
90         quadlet_t data[4];
91         struct dma_cmd end;
92         quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
93 };
94
95 struct dma_iso_ctx {
96         struct ti_ohci *ohci;
97         int type; /* OHCI_ISO_TRANSMIT or OHCI_ISO_RECEIVE */
98         struct ohci1394_iso_tasklet iso_tasklet;
99         int channel;
100         int ctx;
101         int last_buffer;
102         int * next_buffer;  /* For ISO Transmit of video packets
103                                to write the correct SYT field
104                                into the next block */
105         unsigned int num_desc;
106         unsigned int buf_size;
107         unsigned int frame_size;
108         unsigned int packet_size;
109         unsigned int left_size;
110         unsigned int nb_cmd;
111
112         struct dma_region dma;
113
114         struct dma_prog_region *prg_reg;
115
116         struct dma_cmd **ir_prg;
117         struct it_dma_prg **it_prg;
118
119         unsigned int *buffer_status;
120         unsigned int *buffer_prg_assignment;
121         struct timeval *buffer_time; /* time when the buffer was received */
122         unsigned int *last_used_cmd; /* For ISO Transmit with
123                                         variable sized packets only ! */
124         int ctrlClear;
125         int ctrlSet;
126         int cmdPtr;
127         int ctxMatch;
128         wait_queue_head_t waitq;
129         spinlock_t lock;
130         unsigned int syt_offset;
131         int flags;
132
133         struct list_head link;
134 };
135
136
137 struct file_ctx {
138         struct ti_ohci *ohci;
139         struct list_head context_list;
140         struct dma_iso_ctx *current_ctx;
141 };
142
143 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
144 #define VIDEO1394_DEBUG
145 #endif
146
147 #ifdef DBGMSG
148 #undef DBGMSG
149 #endif
150
151 #ifdef VIDEO1394_DEBUG
152 #define DBGMSG(card, fmt, args...) \
153 printk(KERN_INFO "video1394_%d: " fmt "\n" , card , ## args)
154 #else
155 #define DBGMSG(card, fmt, args...)
156 #endif
157
158 /* print general (card independent) information */
159 #define PRINT_G(level, fmt, args...) \
160 printk(level "video1394: " fmt "\n" , ## args)
161
162 /* print card specific information */
163 #define PRINT(level, card, fmt, args...) \
164 printk(level "video1394_%d: " fmt "\n" , card , ## args)
165
166 static void wakeup_dma_ir_ctx(unsigned long l);
167 static void wakeup_dma_it_ctx(unsigned long l);
168
169 static struct hpsb_highlevel video1394_highlevel;
170
171 static int free_dma_iso_ctx(struct dma_iso_ctx *d)
172 {
173         int i;
174
175         DBGMSG(d->ohci->host->id, "Freeing dma_iso_ctx %d", d->ctx);
176
177         ohci1394_stop_context(d->ohci, d->ctrlClear, NULL);
178         if (d->iso_tasklet.link.next != NULL)
179                 ohci1394_unregister_iso_tasklet(d->ohci, &d->iso_tasklet);
180
181         dma_region_free(&d->dma);
182
183         if (d->prg_reg) {
184                 for (i = 0; i < d->num_desc; i++)
185                         dma_prog_region_free(&d->prg_reg[i]);
186                 kfree(d->prg_reg);
187         }
188
189         kfree(d->ir_prg);
190         kfree(d->it_prg);
191         kfree(d->buffer_status);
192         kfree(d->buffer_prg_assignment);
193         kfree(d->buffer_time);
194         kfree(d->last_used_cmd);
195         kfree(d->next_buffer);
196         list_del(&d->link);
197         kfree(d);
198
199         return 0;
200 }
201
202 static struct dma_iso_ctx *
203 alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int num_desc,
204                   int buf_size, int channel, unsigned int packet_size)
205 {
206         struct dma_iso_ctx *d;
207         int i;
208
209         d = kmalloc(sizeof(struct dma_iso_ctx), GFP_KERNEL);
210         if (d == NULL) {
211                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma_iso_ctx");
212                 return NULL;
213         }
214
215         memset(d, 0, sizeof *d);
216
217         d->ohci = ohci;
218         d->type = type;
219         d->channel = channel;
220         d->num_desc = num_desc;
221         d->frame_size = buf_size;
222         d->buf_size = PAGE_ALIGN(buf_size);
223         d->last_buffer = -1;
224         INIT_LIST_HEAD(&d->link);
225         init_waitqueue_head(&d->waitq);
226
227         /* Init the regions for easy cleanup */
228         dma_region_init(&d->dma);
229
230         if (dma_region_alloc(&d->dma, (d->num_desc - 1) * d->buf_size, ohci->dev,
231                              PCI_DMA_BIDIRECTIONAL)) {
232                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma buffer");
233                 free_dma_iso_ctx(d);
234                 return NULL;
235         }
236
237         if (type == OHCI_ISO_RECEIVE)
238                 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
239                                           wakeup_dma_ir_ctx,
240                                           (unsigned long) d);
241         else
242                 ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
243                                           wakeup_dma_it_ctx,
244                                           (unsigned long) d);
245
246         if (ohci1394_register_iso_tasklet(ohci, &d->iso_tasklet) < 0) {
247                 PRINT(KERN_ERR, ohci->host->id, "no free iso %s contexts",
248                       type == OHCI_ISO_RECEIVE ? "receive" : "transmit");
249                 free_dma_iso_ctx(d);
250                 return NULL;
251         }
252         d->ctx = d->iso_tasklet.context;
253
254         d->prg_reg = kmalloc(d->num_desc * sizeof(struct dma_prog_region),
255                         GFP_KERNEL);
256         if (d->prg_reg == NULL) {
257                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate ir prg regs");
258                 free_dma_iso_ctx(d);
259                 return NULL;
260         }
261         /* Makes for easier cleanup */
262         for (i = 0; i < d->num_desc; i++)
263                 dma_prog_region_init(&d->prg_reg[i]);
264
265         if (type == OHCI_ISO_RECEIVE) {
266                 d->ctrlSet = OHCI1394_IsoRcvContextControlSet+32*d->ctx;
267                 d->ctrlClear = OHCI1394_IsoRcvContextControlClear+32*d->ctx;
268                 d->cmdPtr = OHCI1394_IsoRcvCommandPtr+32*d->ctx;
269                 d->ctxMatch = OHCI1394_IsoRcvContextMatch+32*d->ctx;
270
271                 d->ir_prg = kmalloc(d->num_desc * sizeof(struct dma_cmd *),
272                                     GFP_KERNEL);
273
274                 if (d->ir_prg == NULL) {
275                         PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
276                         free_dma_iso_ctx(d);
277                         return NULL;
278                 }
279                 memset(d->ir_prg, 0, d->num_desc * sizeof(struct dma_cmd *));
280
281                 d->nb_cmd = d->buf_size / PAGE_SIZE + 1;
282                 d->left_size = (d->frame_size % PAGE_SIZE) ?
283                         d->frame_size % PAGE_SIZE : PAGE_SIZE;
284
285                 for (i = 0;i < d->num_desc; i++) {
286                         if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
287                                                   sizeof(struct dma_cmd), ohci->dev)) {
288                                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
289                                 free_dma_iso_ctx(d);
290                                 return NULL;
291                         }
292                         d->ir_prg[i] = (struct dma_cmd *)d->prg_reg[i].kvirt;
293                 }
294
295         } else {  /* OHCI_ISO_TRANSMIT */
296                 d->ctrlSet = OHCI1394_IsoXmitContextControlSet+16*d->ctx;
297                 d->ctrlClear = OHCI1394_IsoXmitContextControlClear+16*d->ctx;
298                 d->cmdPtr = OHCI1394_IsoXmitCommandPtr+16*d->ctx;
299
300                 d->it_prg = kmalloc(d->num_desc * sizeof(struct it_dma_prg *),
301                                     GFP_KERNEL);
302
303                 if (d->it_prg == NULL) {
304                         PRINT(KERN_ERR, ohci->host->id,
305                               "Failed to allocate dma it prg");
306                         free_dma_iso_ctx(d);
307                         return NULL;
308                 }
309                 memset(d->it_prg, 0, d->num_desc*sizeof(struct it_dma_prg *));
310
311                 d->packet_size = packet_size;
312
313                 if (PAGE_SIZE % packet_size || packet_size>4096) {
314                         PRINT(KERN_ERR, ohci->host->id,
315                               "Packet size %d (page_size: %ld) "
316                               "not yet supported\n",
317                               packet_size, PAGE_SIZE);
318                         free_dma_iso_ctx(d);
319                         return NULL;
320                 }
321
322                 d->nb_cmd = d->frame_size / d->packet_size;
323                 if (d->frame_size % d->packet_size) {
324                         d->nb_cmd++;
325                         d->left_size = d->frame_size % d->packet_size;
326                 } else
327                         d->left_size = d->packet_size;
328
329                 for (i = 0; i < d->num_desc; i++) {
330                         if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
331                                                 sizeof(struct it_dma_prg), ohci->dev)) {
332                                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma it prg");
333                                 free_dma_iso_ctx(d);
334                                 return NULL;
335                         }
336                         d->it_prg[i] = (struct it_dma_prg *)d->prg_reg[i].kvirt;
337                 }
338         }
339
340         d->buffer_status = kmalloc(d->num_desc * sizeof(unsigned int),
341                                    GFP_KERNEL);
342         d->buffer_prg_assignment = kmalloc(d->num_desc * sizeof(unsigned int),
343                                    GFP_KERNEL);
344         d->buffer_time = kmalloc(d->num_desc * sizeof(struct timeval),
345                                    GFP_KERNEL);
346         d->last_used_cmd = kmalloc(d->num_desc * sizeof(unsigned int),
347                                    GFP_KERNEL);
348         d->next_buffer = kmalloc(d->num_desc * sizeof(int),
349                                  GFP_KERNEL);
350
351         if (d->buffer_status == NULL) {
352                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_status");
353                 free_dma_iso_ctx(d);
354                 return NULL;
355         }
356         if (d->buffer_prg_assignment == NULL) {
357                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_prg_assignment");
358                 free_dma_iso_ctx(d);
359                 return NULL;
360         }
361         if (d->buffer_time == NULL) {
362                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_time");
363                 free_dma_iso_ctx(d);
364                 return NULL;
365         }
366         if (d->last_used_cmd == NULL) {
367                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate last_used_cmd");
368                 free_dma_iso_ctx(d);
369                 return NULL;
370         }
371         if (d->next_buffer == NULL) {
372                 PRINT(KERN_ERR, ohci->host->id, "Failed to allocate next_buffer");
373                 free_dma_iso_ctx(d);
374                 return NULL;
375         }
376         memset(d->buffer_status, 0, d->num_desc * sizeof(unsigned int));
377         memset(d->buffer_prg_assignment, 0, d->num_desc * sizeof(unsigned int));
378         memset(d->buffer_time, 0, d->num_desc * sizeof(struct timeval));
379         memset(d->last_used_cmd, 0, d->num_desc * sizeof(unsigned int));
380         memset(d->next_buffer, -1, d->num_desc * sizeof(int));
381
382         spin_lock_init(&d->lock);
383
384         PRINT(KERN_INFO, ohci->host->id, "Iso %s DMA: %d buffers "
385               "of size %d allocated for a frame size %d, each with %d prgs",
386               (type == OHCI_ISO_RECEIVE) ? "receive" : "transmit",
387               d->num_desc - 1, d->buf_size, d->frame_size, d->nb_cmd);
388
389         return d;
390 }
391
392 static void reset_ir_status(struct dma_iso_ctx *d, int n)
393 {
394         int i;
395         d->ir_prg[n][0].status = cpu_to_le32(4);
396         d->ir_prg[n][1].status = cpu_to_le32(PAGE_SIZE-4);
397         for (i = 2; i < d->nb_cmd - 1; i++)
398                 d->ir_prg[n][i].status = cpu_to_le32(PAGE_SIZE);
399         d->ir_prg[n][i].status = cpu_to_le32(d->left_size);
400 }
401
402 static void reprogram_dma_ir_prg(struct dma_iso_ctx *d, int n, int buffer, int flags)
403 {
404         struct dma_cmd *ir_prg = d->ir_prg[n];
405         unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
406         int i;
407
408         d->buffer_prg_assignment[n] = buffer;
409
410         ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
411                                 (unsigned long)d->dma.kvirt));
412         ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
413                                 (buf + 4) - (unsigned long)d->dma.kvirt));
414
415         for (i=2;i<d->nb_cmd-1;i++) {
416                 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
417                                                 (buf+(i-1)*PAGE_SIZE) -
418                                                 (unsigned long)d->dma.kvirt));
419         }
420
421         ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
422                                   DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
423         ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
424                                   (buf+(i-1)*PAGE_SIZE) - (unsigned long)d->dma.kvirt));
425 }
426
427 static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
428 {
429         struct dma_cmd *ir_prg = d->ir_prg[n];
430         struct dma_prog_region *ir_reg = &d->prg_reg[n];
431         unsigned long buf = (unsigned long)d->dma.kvirt;
432         int i;
433
434         /* the first descriptor will read only 4 bytes */
435         ir_prg[0].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
436                 DMA_CTL_BRANCH | 4);
437
438         /* set the sync flag */
439         if (flags & VIDEO1394_SYNC_FRAMES)
440                 ir_prg[0].control |= cpu_to_le32(DMA_CTL_WAIT);
441
442         ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
443                                 (unsigned long)d->dma.kvirt));
444         ir_prg[0].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
445                                         1 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
446
447         /* If there is *not* only one DMA page per frame (hence, d->nb_cmd==2) */
448         if (d->nb_cmd > 2) {
449                 /* The second descriptor will read PAGE_SIZE-4 bytes */
450                 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
451                                                 DMA_CTL_BRANCH | (PAGE_SIZE-4));
452                 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf + 4) -
453                                                 (unsigned long)d->dma.kvirt));
454                 ir_prg[1].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
455                                                       2 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
456
457                 for (i = 2; i < d->nb_cmd - 1; i++) {
458                         ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
459                                                         DMA_CTL_BRANCH | PAGE_SIZE);
460                         ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
461                                                         (buf+(i-1)*PAGE_SIZE) -
462                                                         (unsigned long)d->dma.kvirt));
463
464                         ir_prg[i].branchAddress =
465                                 cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
466                                             (i + 1) * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
467                 }
468
469                 /* The last descriptor will generate an interrupt */
470                 ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
471                                                 DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
472                 ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
473                                                 (buf+(i-1)*PAGE_SIZE) -
474                                                 (unsigned long)d->dma.kvirt));
475         } else {
476                 /* Only one DMA page is used. Read d->left_size immediately and */
477                 /* generate an interrupt as this is also the last page. */
478                 ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
479                                                 DMA_CTL_IRQ | DMA_CTL_BRANCH | (d->left_size-4));
480                 ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
481                                                 (buf + 4) - (unsigned long)d->dma.kvirt));
482         }
483 }
484
485 static void initialize_dma_ir_ctx(struct dma_iso_ctx *d, int tag, int flags)
486 {
487         struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
488         int i;
489
490         d->flags = flags;
491
492         ohci1394_stop_context(ohci, d->ctrlClear, NULL);
493
494         for (i=0;i<d->num_desc;i++) {
495                 initialize_dma_ir_prg(d, i, flags);
496                 reset_ir_status(d, i);
497         }
498
499         /* reset the ctrl register */
500         reg_write(ohci, d->ctrlClear, 0xf0000000);
501
502         /* Set bufferFill */
503         reg_write(ohci, d->ctrlSet, 0x80000000);
504
505         /* Set isoch header */
506         if (flags & VIDEO1394_INCLUDE_ISO_HEADERS)
507                 reg_write(ohci, d->ctrlSet, 0x40000000);
508
509         /* Set the context match register to match on all tags,
510            sync for sync tag, and listen to d->channel */
511         reg_write(ohci, d->ctxMatch, 0xf0000000|((tag&0xf)<<8)|d->channel);
512
513         /* Set up isoRecvIntMask to generate interrupts */
514         reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1<<d->ctx);
515 }
516
517 /* find which context is listening to this channel */
518 static struct dma_iso_ctx *
519 find_ctx(struct list_head *list, int type, int channel)
520 {
521         struct dma_iso_ctx *ctx;
522
523         list_for_each_entry(ctx, list, link) {
524                 if (ctx->type == type && ctx->channel == channel)
525                         return ctx;
526         }
527
528         return NULL;
529 }
530
531 static void wakeup_dma_ir_ctx(unsigned long l)
532 {
533         struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
534         int i;
535
536         spin_lock(&d->lock);
537
538         for (i = 0; i < d->num_desc; i++) {
539                 if (d->ir_prg[i][d->nb_cmd-1].status & cpu_to_le32(0xFFFF0000)) {
540                         reset_ir_status(d, i);
541                         d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
542                         do_gettimeofday(&d->buffer_time[i]);
543                 }
544         }
545
546         spin_unlock(&d->lock);
547
548         if (waitqueue_active(&d->waitq))
549                 wake_up_interruptible(&d->waitq);
550 }
551
552 static inline void put_timestamp(struct ti_ohci *ohci, struct dma_iso_ctx * d,
553                                  int n)
554 {
555         unsigned char* buf = d->dma.kvirt + n * d->buf_size;
556         u32 cycleTimer;
557         u32 timeStamp;
558
559         if (n == -1) {
560           return;
561         }
562
563         cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
564
565         timeStamp = ((cycleTimer & 0x0fff) + d->syt_offset); /* 11059 = 450 us */
566         timeStamp = (timeStamp % 3072 + ((timeStamp / 3072) << 12)
567                 + (cycleTimer & 0xf000)) & 0xffff;
568
569         buf[6] = timeStamp >> 8;
570         buf[7] = timeStamp & 0xff;
571
572     /* if first packet is empty packet, then put timestamp into the next full one too */
573     if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
574             buf += d->packet_size;
575         buf[6] = timeStamp >> 8;
576             buf[7] = timeStamp & 0xff;
577         }
578
579     /* do the next buffer frame too in case of irq latency */
580         n = d->next_buffer[n];
581         if (n == -1) {
582           return;
583         }
584         buf = d->dma.kvirt + n * d->buf_size;
585
586         timeStamp += (d->last_used_cmd[n] << 12) & 0xffff;
587
588         buf[6] = timeStamp >> 8;
589         buf[7] = timeStamp & 0xff;
590
591     /* if first packet is empty packet, then put timestamp into the next full one too */
592     if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
593             buf += d->packet_size;
594         buf[6] = timeStamp >> 8;
595             buf[7] = timeStamp & 0xff;
596         }
597
598 #if 0
599         printk("curr: %d, next: %d, cycleTimer: %08x timeStamp: %08x\n",
600                curr, n, cycleTimer, timeStamp);
601 #endif
602 }
603
604 static void wakeup_dma_it_ctx(unsigned long l)
605 {
606         struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
607         struct ti_ohci *ohci = d->ohci;
608         int i;
609
610         spin_lock(&d->lock);
611
612         for (i = 0; i < d->num_desc; i++) {
613                 if (d->it_prg[i][d->last_used_cmd[i]].end.status &
614                     cpu_to_le32(0xFFFF0000)) {
615                         int next = d->next_buffer[i];
616                         put_timestamp(ohci, d, next);
617                         d->it_prg[i][d->last_used_cmd[i]].end.status = 0;
618                         d->buffer_status[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
619                 }
620         }
621
622         spin_unlock(&d->lock);
623
624         if (waitqueue_active(&d->waitq))
625                 wake_up_interruptible(&d->waitq);
626 }
627
628 static void reprogram_dma_it_prg(struct dma_iso_ctx  *d, int n, int buffer)
629 {
630         struct it_dma_prg *it_prg = d->it_prg[n];
631         unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
632         int i;
633
634         d->buffer_prg_assignment[n] = buffer;
635         for (i=0;i<d->nb_cmd;i++) {
636           it_prg[i].end.address =
637                 cpu_to_le32(dma_region_offset_to_bus(&d->dma,
638                         (buf+i*d->packet_size) - (unsigned long)d->dma.kvirt));
639         }
640 }
641
642 static void initialize_dma_it_prg(struct dma_iso_ctx *d, int n, int sync_tag)
643 {
644         struct it_dma_prg *it_prg = d->it_prg[n];
645         struct dma_prog_region *it_reg = &d->prg_reg[n];
646         unsigned long buf = (unsigned long)d->dma.kvirt;
647         int i;
648         d->last_used_cmd[n] = d->nb_cmd - 1;
649         for (i=0;i<d->nb_cmd;i++) {
650
651                 it_prg[i].begin.control = cpu_to_le32(DMA_CTL_OUTPUT_MORE |
652                         DMA_CTL_IMMEDIATE | 8) ;
653                 it_prg[i].begin.address = 0;
654
655                 it_prg[i].begin.status = 0;
656
657                 it_prg[i].data[0] = cpu_to_le32(
658                         (IEEE1394_SPEED_100 << 16)
659                         | (/* tag */ 1 << 14)
660                         | (d->channel << 8)
661                         | (TCODE_ISO_DATA << 4));
662                 if (i==0) it_prg[i].data[0] |= cpu_to_le32(sync_tag);
663                 it_prg[i].data[1] = cpu_to_le32(d->packet_size << 16);
664                 it_prg[i].data[2] = 0;
665                 it_prg[i].data[3] = 0;
666
667                 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST |
668                                              DMA_CTL_BRANCH);
669                 it_prg[i].end.address =
670                         cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf+i*d->packet_size) -
671                                                 (unsigned long)d->dma.kvirt));
672
673                 if (i<d->nb_cmd-1) {
674                         it_prg[i].end.control |= cpu_to_le32(d->packet_size);
675                         it_prg[i].begin.branchAddress =
676                                 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
677                                         sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
678                         it_prg[i].end.branchAddress =
679                                 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
680                                         sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
681                 } else {
682                         /* the last prg generates an interrupt */
683                         it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
684                                 DMA_CTL_IRQ | d->left_size);
685                         /* the last prg doesn't branch */
686                         it_prg[i].begin.branchAddress = 0;
687                         it_prg[i].end.branchAddress = 0;
688                 }
689                 it_prg[i].end.status = 0;
690         }
691 }
692
693 static void initialize_dma_it_prg_var_packet_queue(
694         struct dma_iso_ctx *d, int n, unsigned int * packet_sizes,
695         struct ti_ohci *ohci)
696 {
697         struct it_dma_prg *it_prg = d->it_prg[n];
698         struct dma_prog_region *it_reg = &d->prg_reg[n];
699         int i;
700
701 #if 0
702         if (n != -1) {
703                 put_timestamp(ohci, d, n);
704         }
705 #endif
706         d->last_used_cmd[n] = d->nb_cmd - 1;
707
708         for (i = 0; i < d->nb_cmd; i++) {
709                 unsigned int size;
710                 if (packet_sizes[i] > d->packet_size) {
711                         size = d->packet_size;
712                 } else {
713                         size = packet_sizes[i];
714                 }
715                 it_prg[i].data[1] = cpu_to_le32(size << 16);
716                 it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH);
717
718                 if (i < d->nb_cmd-1 && packet_sizes[i+1] != 0) {
719                         it_prg[i].end.control |= cpu_to_le32(size);
720                         it_prg[i].begin.branchAddress =
721                                 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
722                                         sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
723                         it_prg[i].end.branchAddress =
724                                 cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
725                                         sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
726                 } else {
727                         /* the last prg generates an interrupt */
728                         it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
729                                 DMA_CTL_IRQ | size);
730                         /* the last prg doesn't branch */
731                         it_prg[i].begin.branchAddress = 0;
732                         it_prg[i].end.branchAddress = 0;
733                         d->last_used_cmd[n] = i;
734                         break;
735                 }
736         }
737 }
738
739 static void initialize_dma_it_ctx(struct dma_iso_ctx *d, int sync_tag,
740                                   unsigned int syt_offset, int flags)
741 {
742         struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
743         int i;
744
745         d->flags = flags;
746         d->syt_offset = (syt_offset == 0 ? 11000 : syt_offset);
747
748         ohci1394_stop_context(ohci, d->ctrlClear, NULL);
749
750         for (i=0;i<d->num_desc;i++)
751                 initialize_dma_it_prg(d, i, sync_tag);
752
753         /* Set up isoRecvIntMask to generate interrupts */
754         reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1<<d->ctx);
755 }
756
757 static inline unsigned video1394_buffer_state(struct dma_iso_ctx *d,
758                                               unsigned int buffer)
759 {
760         unsigned long flags;
761         unsigned int ret;
762         spin_lock_irqsave(&d->lock, flags);
763         ret = d->buffer_status[buffer];
764         spin_unlock_irqrestore(&d->lock, flags);
765         return ret;
766 }
767
768 static int __video1394_ioctl(struct file *file,
769                              unsigned int cmd, unsigned long arg)
770 {
771         struct file_ctx *ctx = (struct file_ctx *)file->private_data;
772         struct ti_ohci *ohci = ctx->ohci;
773         unsigned long flags;
774         void __user *argp = (void __user *)arg;
775
776         switch(cmd)
777         {
778         case VIDEO1394_IOC_LISTEN_CHANNEL:
779         case VIDEO1394_IOC_TALK_CHANNEL:
780         {
781                 struct video1394_mmap v;
782                 u64 mask;
783                 struct dma_iso_ctx *d;
784                 int i;
785
786                 if (copy_from_user(&v, argp, sizeof(v)))
787                         return -EFAULT;
788
789                 /* if channel < 0, find lowest available one */
790                 if (v.channel < 0) {
791                     mask = (u64)0x1;
792                     for (i=0; ; i++) {
793                         if (i == ISO_CHANNELS) {
794                             PRINT(KERN_ERR, ohci->host->id, 
795                                   "No free channel found");
796                             return EAGAIN;
797                         }
798                         if (!(ohci->ISO_channel_usage & mask)) {
799                             v.channel = i;
800                             PRINT(KERN_INFO, ohci->host->id, "Found free channel %d", i);
801                             break;
802                         }
803                         mask = mask << 1;
804                     }
805                 } else if (v.channel >= ISO_CHANNELS) {
806                         PRINT(KERN_ERR, ohci->host->id,
807                               "Iso channel %d out of bounds", v.channel);
808                         return -EINVAL;
809                 } else {
810                         mask = (u64)0x1<<v.channel;
811                 }
812                 PRINT(KERN_INFO, ohci->host->id, "mask: %08X%08X usage: %08X%08X\n",
813                         (u32)(mask>>32),(u32)(mask&0xffffffff),
814                         (u32)(ohci->ISO_channel_usage>>32),
815                         (u32)(ohci->ISO_channel_usage&0xffffffff));
816                 if (ohci->ISO_channel_usage & mask) {
817                         PRINT(KERN_ERR, ohci->host->id,
818                               "Channel %d is already taken", v.channel);
819                         return -EBUSY;
820                 }
821
822                 if (v.buf_size == 0 || v.buf_size > VIDEO1394_MAX_SIZE) {
823                         PRINT(KERN_ERR, ohci->host->id,
824                               "Invalid %d length buffer requested",v.buf_size);
825                         return -EINVAL;
826                 }
827
828                 if (v.nb_buffers == 0 || v.nb_buffers > VIDEO1394_MAX_SIZE) {
829                         PRINT(KERN_ERR, ohci->host->id,
830                               "Invalid %d buffers requested",v.nb_buffers);
831                         return -EINVAL;
832                 }
833
834                 if (v.nb_buffers * v.buf_size > VIDEO1394_MAX_SIZE) {
835                         PRINT(KERN_ERR, ohci->host->id,
836                               "%d buffers of size %d bytes is too big",
837                               v.nb_buffers, v.buf_size);
838                         return -EINVAL;
839                 }
840
841                 if (cmd == VIDEO1394_IOC_LISTEN_CHANNEL) {
842                         d = alloc_dma_iso_ctx(ohci, OHCI_ISO_RECEIVE,
843                                               v.nb_buffers + 1, v.buf_size,
844                                               v.channel, 0);
845
846                         if (d == NULL) {
847                                 PRINT(KERN_ERR, ohci->host->id,
848                                       "Couldn't allocate ir context");
849                                 return -EAGAIN;
850                         }
851                         initialize_dma_ir_ctx(d, v.sync_tag, v.flags);
852
853                         ctx->current_ctx = d;
854
855                         v.buf_size = d->buf_size;
856                         list_add_tail(&d->link, &ctx->context_list);
857
858                         PRINT(KERN_INFO, ohci->host->id,
859                               "iso context %d listen on channel %d",
860                               d->ctx, v.channel);
861                 }
862                 else {
863                         d = alloc_dma_iso_ctx(ohci, OHCI_ISO_TRANSMIT,
864                                               v.nb_buffers + 1, v.buf_size,
865                                               v.channel, v.packet_size);
866
867                         if (d == NULL) {
868                                 PRINT(KERN_ERR, ohci->host->id,
869                                       "Couldn't allocate it context");
870                                 return -EAGAIN;
871                         }
872                         initialize_dma_it_ctx(d, v.sync_tag,
873                                               v.syt_offset, v.flags);
874
875                         ctx->current_ctx = d;
876
877                         v.buf_size = d->buf_size;
878
879                         list_add_tail(&d->link, &ctx->context_list);
880
881                         PRINT(KERN_INFO, ohci->host->id,
882                               "Iso context %d talk on channel %d", d->ctx,
883                               v.channel);
884                 }
885
886                 if (copy_to_user(argp, &v, sizeof(v))) {
887                         /* FIXME : free allocated dma resources */
888                         return -EFAULT;
889                 }
890                 
891                 ohci->ISO_channel_usage |= mask;
892
893                 return 0;
894         }
895         case VIDEO1394_IOC_UNLISTEN_CHANNEL:
896         case VIDEO1394_IOC_UNTALK_CHANNEL:
897         {
898                 int channel;
899                 u64 mask;
900                 struct dma_iso_ctx *d;
901
902                 if (copy_from_user(&channel, argp, sizeof(int)))
903                         return -EFAULT;
904
905                 if (channel < 0 || channel >= ISO_CHANNELS) {
906                         PRINT(KERN_ERR, ohci->host->id,
907                               "Iso channel %d out of bound", channel);
908                         return -EINVAL;
909                 }
910                 mask = (u64)0x1<<channel;
911                 if (!(ohci->ISO_channel_usage & mask)) {
912                         PRINT(KERN_ERR, ohci->host->id,
913                               "Channel %d is not being used", channel);
914                         return -ESRCH;
915                 }
916
917                 /* Mark this channel as unused */
918                 ohci->ISO_channel_usage &= ~mask;
919
920                 if (cmd == VIDEO1394_IOC_UNLISTEN_CHANNEL)
921                         d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, channel);
922                 else
923                         d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, channel);
924
925                 if (d == NULL) return -ESRCH;
926                 PRINT(KERN_INFO, ohci->host->id, "Iso context %d "
927                       "stop talking on channel %d", d->ctx, channel);
928                 free_dma_iso_ctx(d);
929
930                 return 0;
931         }
932         case VIDEO1394_IOC_LISTEN_QUEUE_BUFFER:
933         {
934                 struct video1394_wait v;
935                 struct dma_iso_ctx *d;
936                 int next_prg;
937
938                 if (copy_from_user(&v, argp, sizeof(v)))
939                         return -EFAULT;
940
941                 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
942                 if (d == NULL) return -EFAULT;
943
944                 if ((v.buffer<0) || (v.buffer>=d->num_desc - 1)) {
945                         PRINT(KERN_ERR, ohci->host->id,
946                               "Buffer %d out of range",v.buffer);
947                         return -EINVAL;
948                 }
949
950                 spin_lock_irqsave(&d->lock,flags);
951
952                 if (d->buffer_status[v.buffer]==VIDEO1394_BUFFER_QUEUED) {
953                         PRINT(KERN_ERR, ohci->host->id,
954                               "Buffer %d is already used",v.buffer);
955                         spin_unlock_irqrestore(&d->lock,flags);
956                         return -EBUSY;
957                 }
958
959                 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
960
961                 next_prg = (d->last_buffer + 1) % d->num_desc;
962                 if (d->last_buffer>=0)
963                         d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress =
964                                 cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 0)
965                                         & 0xfffffff0) | 0x1);
966
967                 d->last_buffer = next_prg;
968                 reprogram_dma_ir_prg(d, d->last_buffer, v.buffer, d->flags);
969
970                 d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress = 0;
971
972                 spin_unlock_irqrestore(&d->lock,flags);
973
974                 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
975                 {
976                         DBGMSG(ohci->host->id, "Starting iso DMA ctx=%d",d->ctx);
977
978                         /* Tell the controller where the first program is */
979                         reg_write(ohci, d->cmdPtr,
980                                   dma_prog_region_offset_to_bus(&d->prg_reg[d->last_buffer], 0) | 0x1);
981
982                         /* Run IR context */
983                         reg_write(ohci, d->ctrlSet, 0x8000);
984                 }
985                 else {
986                         /* Wake up dma context if necessary */
987                         if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
988                                 PRINT(KERN_INFO, ohci->host->id,
989                                       "Waking up iso dma ctx=%d", d->ctx);
990                                 reg_write(ohci, d->ctrlSet, 0x1000);
991                         }
992                 }
993                 return 0;
994
995         }
996         case VIDEO1394_IOC_LISTEN_WAIT_BUFFER:
997         case VIDEO1394_IOC_LISTEN_POLL_BUFFER:
998         {
999                 struct video1394_wait v;
1000                 struct dma_iso_ctx *d;
1001                 int i = 0;
1002
1003                 if (copy_from_user(&v, argp, sizeof(v)))
1004                         return -EFAULT;
1005
1006                 d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
1007                 if (d == NULL) return -EFAULT;
1008
1009                 if ((v.buffer<0) || (v.buffer>d->num_desc - 1)) {
1010                         PRINT(KERN_ERR, ohci->host->id,
1011                               "Buffer %d out of range",v.buffer);
1012                         return -EINVAL;
1013                 }
1014
1015                 /*
1016                  * I change the way it works so that it returns
1017                  * the last received frame.
1018                  */
1019                 spin_lock_irqsave(&d->lock, flags);
1020                 switch(d->buffer_status[v.buffer]) {
1021                 case VIDEO1394_BUFFER_READY:
1022                         d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1023                         break;
1024                 case VIDEO1394_BUFFER_QUEUED:
1025                         if (cmd == VIDEO1394_IOC_LISTEN_POLL_BUFFER) {
1026                             /* for polling, return error code EINTR */
1027                             spin_unlock_irqrestore(&d->lock, flags);
1028                             return -EINTR;
1029                         }
1030
1031                         spin_unlock_irqrestore(&d->lock, flags);
1032                         wait_event_interruptible(d->waitq,
1033                                         video1394_buffer_state(d, v.buffer) ==
1034                                          VIDEO1394_BUFFER_READY);
1035                         if (signal_pending(current))
1036                                 return -EINTR;
1037                         spin_lock_irqsave(&d->lock, flags);
1038                         d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1039                         break;
1040                 default:
1041                         PRINT(KERN_ERR, ohci->host->id,
1042                               "Buffer %d is not queued",v.buffer);
1043                         spin_unlock_irqrestore(&d->lock, flags);
1044                         return -ESRCH;
1045                 }
1046
1047                 /* set time of buffer */
1048                 v.filltime = d->buffer_time[v.buffer];
1049 //              printk("Buffer %d time %d\n", v.buffer, (d->buffer_time[v.buffer]).tv_usec);
1050
1051                 /*
1052                  * Look ahead to see how many more buffers have been received
1053                  */
1054                 i=0;
1055                 while (d->buffer_status[(v.buffer+1)%(d->num_desc - 1)]==
1056                        VIDEO1394_BUFFER_READY) {
1057                         v.buffer=(v.buffer+1)%(d->num_desc - 1);
1058                         i++;
1059                 }
1060                 spin_unlock_irqrestore(&d->lock, flags);
1061
1062                 v.buffer=i;
1063                 if (copy_to_user(argp, &v, sizeof(v)))
1064                         return -EFAULT;
1065
1066                 return 0;
1067         }
1068         case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1069         {
1070                 struct video1394_wait v;
1071                 unsigned int *psizes = NULL;
1072                 struct dma_iso_ctx *d;
1073                 int next_prg;
1074
1075                 if (copy_from_user(&v, argp, sizeof(v)))
1076                         return -EFAULT;
1077
1078                 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1079                 if (d == NULL) return -EFAULT;
1080
1081                 if ((v.buffer<0) || (v.buffer>=d->num_desc - 1)) {
1082                         PRINT(KERN_ERR, ohci->host->id,
1083                               "Buffer %d out of range",v.buffer);
1084                         return -EINVAL;
1085                 }
1086
1087                 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1088                         int buf_size = d->nb_cmd * sizeof(unsigned int);
1089                         struct video1394_queue_variable __user *p = argp;
1090                         unsigned int __user *qv;
1091
1092                         if (get_user(qv, &p->packet_sizes))
1093                                 return -EFAULT;
1094
1095                         psizes = kmalloc(buf_size, GFP_KERNEL);
1096                         if (!psizes)
1097                                 return -ENOMEM;
1098
1099                         if (copy_from_user(psizes, qv, buf_size)) {
1100                                 kfree(psizes);
1101                                 return -EFAULT;
1102                         }
1103                 }
1104
1105                 spin_lock_irqsave(&d->lock,flags);
1106
1107                 // last_buffer is last_prg
1108                 next_prg = (d->last_buffer + 1) % d->num_desc;
1109                 if (d->buffer_status[v.buffer]!=VIDEO1394_BUFFER_FREE) {
1110                         PRINT(KERN_ERR, ohci->host->id,
1111                               "Buffer %d is already used",v.buffer);
1112                         spin_unlock_irqrestore(&d->lock,flags);
1113                         kfree(psizes);
1114                         return -EBUSY;
1115                 }
1116
1117                 if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
1118                         initialize_dma_it_prg_var_packet_queue(
1119                                 d, next_prg, psizes, ohci);
1120                 }
1121
1122                 d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
1123
1124                 if (d->last_buffer >= 0) {
1125                         d->it_prg[d->last_buffer]
1126                                 [ d->last_used_cmd[d->last_buffer] ].end.branchAddress =
1127                                         cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg],
1128                                                 0) & 0xfffffff0) | 0x3);
1129
1130                         d->it_prg[d->last_buffer]
1131                                 [ d->last_used_cmd[d->last_buffer] ].begin.branchAddress =
1132                                         cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[next_prg],
1133                                                 0) & 0xfffffff0) | 0x3);
1134                         d->next_buffer[d->last_buffer] = (v.buffer + 1) % (d->num_desc - 1);
1135                 }
1136                 d->last_buffer = next_prg;
1137                 reprogram_dma_it_prg(d, d->last_buffer, v.buffer);
1138                 d->next_buffer[d->last_buffer] = -1;
1139
1140                 d->it_prg[d->last_buffer][d->last_used_cmd[d->last_buffer]].end.branchAddress = 0;
1141
1142                 spin_unlock_irqrestore(&d->lock,flags);
1143
1144                 if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
1145                 {
1146                         DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
1147                                d->ctx);
1148                         put_timestamp(ohci, d, d->last_buffer);
1149
1150                         /* Tell the controller where the first program is */
1151                         reg_write(ohci, d->cmdPtr,
1152                                 dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 0) | 0x3);
1153
1154                         /* Run IT context */
1155                         reg_write(ohci, d->ctrlSet, 0x8000);
1156                 }
1157                 else {
1158                         /* Wake up dma context if necessary */
1159                         if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
1160                                 PRINT(KERN_INFO, ohci->host->id,
1161                                       "Waking up iso transmit dma ctx=%d",
1162                                       d->ctx);
1163                                 put_timestamp(ohci, d, d->last_buffer);
1164                                 reg_write(ohci, d->ctrlSet, 0x1000);
1165                         }
1166                 }
1167
1168                 kfree(psizes);
1169                 return 0;
1170
1171         }
1172         case VIDEO1394_IOC_TALK_WAIT_BUFFER:
1173         {
1174                 struct video1394_wait v;
1175                 struct dma_iso_ctx *d;
1176
1177                 if (copy_from_user(&v, argp, sizeof(v)))
1178                         return -EFAULT;
1179
1180                 d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
1181                 if (d == NULL) return -EFAULT;
1182
1183                 if ((v.buffer<0) || (v.buffer>=d->num_desc-1)) {
1184                         PRINT(KERN_ERR, ohci->host->id,
1185                               "Buffer %d out of range",v.buffer);
1186                         return -EINVAL;
1187                 }
1188
1189                 switch(d->buffer_status[v.buffer]) {
1190                 case VIDEO1394_BUFFER_READY:
1191                         d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1192                         return 0;
1193                 case VIDEO1394_BUFFER_QUEUED:
1194                         wait_event_interruptible(d->waitq,
1195                                         (d->buffer_status[v.buffer] == VIDEO1394_BUFFER_READY));
1196                         if (signal_pending(current))
1197                                 return -EINTR;
1198                         d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
1199                         return 0;
1200                 default:
1201                         PRINT(KERN_ERR, ohci->host->id,
1202                               "Buffer %d is not queued",v.buffer);
1203                         return -ESRCH;
1204                 }
1205         }
1206         default:
1207                 return -ENOTTY;
1208         }
1209 }
1210
1211 static long video1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1212 {
1213         int err;
1214         lock_kernel();
1215         err = __video1394_ioctl(file, cmd, arg);
1216         unlock_kernel();
1217         return err;
1218 }
1219
1220 /*
1221  *      This maps the vmalloced and reserved buffer to user space.
1222  *
1223  *  FIXME:
1224  *  - PAGE_READONLY should suffice!?
1225  *  - remap_pfn_range is kind of inefficient for page by page remapping.
1226  *    But e.g. pte_alloc() does not work in modules ... :-(
1227  */
1228
1229 static int video1394_mmap(struct file *file, struct vm_area_struct *vma)
1230 {
1231         struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1232         int res = -EINVAL;
1233
1234         lock_kernel();
1235         if (ctx->current_ctx == NULL) {
1236                 PRINT(KERN_ERR, ctx->ohci->host->id, "Current iso context not set");
1237         } else
1238                 res = dma_region_mmap(&ctx->current_ctx->dma, file, vma);
1239         unlock_kernel();
1240
1241         return res;
1242 }
1243
1244 static int video1394_open(struct inode *inode, struct file *file)
1245 {
1246         int i = ieee1394_file_to_instance(file);
1247         struct ti_ohci *ohci;
1248         struct file_ctx *ctx;
1249
1250         ohci = hpsb_get_hostinfo_bykey(&video1394_highlevel, i);
1251         if (ohci == NULL)
1252                 return -EIO;
1253
1254         ctx = kmalloc(sizeof(struct file_ctx), GFP_KERNEL);
1255         if (ctx == NULL)  {
1256                 PRINT(KERN_ERR, ohci->host->id, "Cannot malloc file_ctx");
1257                 return -ENOMEM;
1258         }
1259
1260         memset(ctx, 0, sizeof(struct file_ctx));
1261         ctx->ohci = ohci;
1262         INIT_LIST_HEAD(&ctx->context_list);
1263         ctx->current_ctx = NULL;
1264         file->private_data = ctx;
1265
1266         return 0;
1267 }
1268
1269 static int video1394_release(struct inode *inode, struct file *file)
1270 {
1271         struct file_ctx *ctx = (struct file_ctx *)file->private_data;
1272         struct ti_ohci *ohci = ctx->ohci;
1273         struct list_head *lh, *next;
1274         u64 mask;
1275
1276         lock_kernel();
1277         list_for_each_safe(lh, next, &ctx->context_list) {
1278                 struct dma_iso_ctx *d;
1279                 d = list_entry(lh, struct dma_iso_ctx, link);
1280                 mask = (u64) 1 << d->channel;
1281
1282                 if (!(ohci->ISO_channel_usage & mask))
1283                         PRINT(KERN_ERR, ohci->host->id, "On release: Channel %d "
1284                               "is not being used", d->channel);
1285                 else
1286                         ohci->ISO_channel_usage &= ~mask;
1287                 PRINT(KERN_INFO, ohci->host->id, "On release: Iso %s context "
1288                       "%d stop listening on channel %d",
1289                       d->type == OHCI_ISO_RECEIVE ? "receive" : "transmit",
1290                       d->ctx, d->channel);
1291                 free_dma_iso_ctx(d);
1292         }
1293
1294         kfree(ctx);
1295         file->private_data = NULL;
1296
1297         unlock_kernel();
1298         return 0;
1299 }
1300
1301 #ifdef CONFIG_COMPAT
1302 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
1303 #endif
1304
1305 static struct cdev video1394_cdev;
1306 static struct file_operations video1394_fops=
1307 {
1308         .owner =        THIS_MODULE,
1309         .unlocked_ioctl = video1394_ioctl,
1310 #ifdef CONFIG_COMPAT
1311         .compat_ioctl = video1394_compat_ioctl,
1312 #endif
1313         .mmap =         video1394_mmap,
1314         .open =         video1394_open,
1315         .release =      video1394_release
1316 };
1317
1318 /*** HOTPLUG STUFF **********************************************************/
1319 /*
1320  * Export information about protocols/devices supported by this driver.
1321  */
1322 static struct ieee1394_device_id video1394_id_table[] = {
1323         {
1324                 .match_flags    = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1325                 .specifier_id   = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1326                 .version        = CAMERA_SW_VERSION_ENTRY & 0xffffff
1327         },
1328         {
1329                 .match_flags    = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1330                 .specifier_id   = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1331                 .version        = (CAMERA_SW_VERSION_ENTRY + 1) & 0xffffff
1332         },
1333         {
1334                 .match_flags    = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
1335                 .specifier_id   = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
1336                 .version        = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff
1337         },
1338         { }
1339 };
1340
1341 MODULE_DEVICE_TABLE(ieee1394, video1394_id_table);
1342
1343 static struct hpsb_protocol_driver video1394_driver = {
1344         .name           = "1394 Digital Camera Driver",
1345         .id_table       = video1394_id_table,
1346         .driver         = {
1347                 .name   = VIDEO1394_DRIVER_NAME,
1348                 .bus    = &ieee1394_bus_type,
1349         },
1350 };
1351
1352
1353 static void video1394_add_host (struct hpsb_host *host)
1354 {
1355         struct ti_ohci *ohci;
1356         int minor;
1357
1358         /* We only work with the OHCI-1394 driver */
1359         if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME))
1360                 return;
1361
1362         ohci = (struct ti_ohci *)host->hostdata;
1363
1364         if (!hpsb_create_hostinfo(&video1394_highlevel, host, 0)) {
1365                 PRINT(KERN_ERR, ohci->host->id, "Cannot allocate hostinfo");
1366                 return;
1367         }
1368
1369         hpsb_set_hostinfo(&video1394_highlevel, host, ohci);
1370         hpsb_set_hostinfo_key(&video1394_highlevel, host, ohci->host->id);
1371
1372         minor = IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id;
1373         class_device_create(hpsb_protocol_class, NULL, MKDEV(
1374                 IEEE1394_MAJOR, minor), 
1375                 NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1376         devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor),
1377                        S_IFCHR | S_IRUSR | S_IWUSR,
1378                        "%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1379 }
1380
1381
1382 static void video1394_remove_host (struct hpsb_host *host)
1383 {
1384         struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
1385
1386         if (ohci) {
1387                 class_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
1388                         IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
1389                 devfs_remove("%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
1390         }
1391         
1392         return;
1393 }
1394
1395
1396 static struct hpsb_highlevel video1394_highlevel = {
1397         .name =         VIDEO1394_DRIVER_NAME,
1398         .add_host =     video1394_add_host,
1399         .remove_host =  video1394_remove_host,
1400 };
1401
1402 MODULE_AUTHOR("Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>");
1403 MODULE_DESCRIPTION("driver for digital video on OHCI board");
1404 MODULE_SUPPORTED_DEVICE(VIDEO1394_DRIVER_NAME);
1405 MODULE_LICENSE("GPL");
1406
1407 #ifdef CONFIG_COMPAT
1408
1409 #define VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER     \
1410         _IOW ('#', 0x12, struct video1394_wait32)
1411 #define VIDEO1394_IOC32_LISTEN_WAIT_BUFFER      \
1412         _IOWR('#', 0x13, struct video1394_wait32)
1413 #define VIDEO1394_IOC32_TALK_WAIT_BUFFER        \
1414         _IOW ('#', 0x17, struct video1394_wait32)
1415 #define VIDEO1394_IOC32_LISTEN_POLL_BUFFER      \
1416         _IOWR('#', 0x18, struct video1394_wait32)
1417
1418 struct video1394_wait32 {
1419         u32 channel;
1420         u32 buffer;
1421         struct compat_timeval filltime;
1422 };
1423
1424 static int video1394_wr_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1425 {
1426         struct video1394_wait32 __user *argp = (void __user *)arg;
1427         struct video1394_wait32 wait32;
1428         struct video1394_wait wait;
1429         mm_segment_t old_fs;
1430         int ret;
1431
1432         if (copy_from_user(&wait32, argp, sizeof(wait32)))
1433                 return -EFAULT;
1434
1435         wait.channel = wait32.channel;
1436         wait.buffer = wait32.buffer;
1437         wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1438         wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1439
1440         old_fs = get_fs();
1441         set_fs(KERNEL_DS);
1442         if (cmd == VIDEO1394_IOC32_LISTEN_WAIT_BUFFER)
1443                 ret = video1394_ioctl(file,
1444                                       VIDEO1394_IOC_LISTEN_WAIT_BUFFER,
1445                                       (unsigned long) &wait);
1446         else
1447                 ret = video1394_ioctl(file,
1448                                       VIDEO1394_IOC_LISTEN_POLL_BUFFER,
1449                                       (unsigned long) &wait);
1450         set_fs(old_fs);
1451
1452         if (!ret) {
1453                 wait32.channel = wait.channel;
1454                 wait32.buffer = wait.buffer;
1455                 wait32.filltime.tv_sec = (int)wait.filltime.tv_sec;
1456                 wait32.filltime.tv_usec = (int)wait.filltime.tv_usec;
1457
1458                 if (copy_to_user(argp, &wait32, sizeof(wait32)))
1459                         ret = -EFAULT;
1460         }
1461
1462         return ret;
1463 }
1464
1465 static int video1394_w_wait32(struct file *file, unsigned int cmd, unsigned long arg)
1466 {
1467         struct video1394_wait32 wait32;
1468         struct video1394_wait wait;
1469         mm_segment_t old_fs;
1470         int ret;
1471
1472         if (copy_from_user(&wait32, (void __user *)arg, sizeof(wait32)))
1473                 return -EFAULT;
1474
1475         wait.channel = wait32.channel;
1476         wait.buffer = wait32.buffer;
1477         wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
1478         wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
1479
1480         old_fs = get_fs();
1481         set_fs(KERNEL_DS);
1482         if (cmd == VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER)
1483                 ret = video1394_ioctl(file,
1484                                       VIDEO1394_IOC_LISTEN_QUEUE_BUFFER,
1485                                       (unsigned long) &wait);
1486         else
1487                 ret = video1394_ioctl(file,
1488                                       VIDEO1394_IOC_TALK_WAIT_BUFFER,
1489                                       (unsigned long) &wait);
1490         set_fs(old_fs);
1491
1492         return ret;
1493 }
1494
1495 static int video1394_queue_buf32(struct file *file, unsigned int cmd, unsigned long arg)
1496 {
1497         return -EFAULT;   /* ??? was there before. */
1498
1499         return video1394_ioctl(file,
1500                                 VIDEO1394_IOC_TALK_QUEUE_BUFFER, arg);
1501 }
1502
1503 static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
1504 {
1505         switch (cmd) {
1506         case VIDEO1394_IOC_LISTEN_CHANNEL:
1507         case VIDEO1394_IOC_UNLISTEN_CHANNEL:
1508         case VIDEO1394_IOC_TALK_CHANNEL:
1509         case VIDEO1394_IOC_UNTALK_CHANNEL:
1510                 return video1394_ioctl(f, cmd, arg);
1511
1512         case VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER:
1513                 return video1394_w_wait32(f, cmd, arg);
1514         case VIDEO1394_IOC32_LISTEN_WAIT_BUFFER:
1515                 return video1394_wr_wait32(f, cmd, arg);
1516         case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
1517                 return video1394_queue_buf32(f, cmd, arg);
1518         case VIDEO1394_IOC32_TALK_WAIT_BUFFER:
1519                 return video1394_w_wait32(f, cmd, arg);
1520         case VIDEO1394_IOC32_LISTEN_POLL_BUFFER:
1521                 return video1394_wr_wait32(f, cmd, arg);
1522         default:
1523                 return -ENOIOCTLCMD;
1524         }
1525 }
1526
1527 #endif /* CONFIG_COMPAT */
1528
1529 static void __exit video1394_exit_module (void)
1530 {
1531         hpsb_unregister_protocol(&video1394_driver);
1532
1533         hpsb_unregister_highlevel(&video1394_highlevel);
1534
1535         devfs_remove(VIDEO1394_DRIVER_NAME);
1536         cdev_del(&video1394_cdev);
1537
1538         PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
1539 }
1540
1541 static int __init video1394_init_module (void)
1542 {
1543         int ret;
1544
1545         cdev_init(&video1394_cdev, &video1394_fops);
1546         video1394_cdev.owner = THIS_MODULE;
1547         kobject_set_name(&video1394_cdev.kobj, VIDEO1394_DRIVER_NAME);
1548         ret = cdev_add(&video1394_cdev, IEEE1394_VIDEO1394_DEV, 16);
1549         if (ret) {
1550                 PRINT_G(KERN_ERR, "video1394: unable to get minor device block");
1551                 return ret;
1552         }
1553
1554         devfs_mk_dir(VIDEO1394_DRIVER_NAME);
1555
1556         hpsb_register_highlevel(&video1394_highlevel);
1557
1558         ret = hpsb_register_protocol(&video1394_driver);
1559         if (ret) {
1560                 PRINT_G(KERN_ERR, "video1394: failed to register protocol");
1561                 hpsb_unregister_highlevel(&video1394_highlevel);
1562                 devfs_remove(VIDEO1394_DRIVER_NAME);
1563                 cdev_del(&video1394_cdev);
1564                 return ret;
1565         }
1566
1567         PRINT_G(KERN_INFO, "Installed " VIDEO1394_DRIVER_NAME " module");
1568         return 0;
1569 }
1570
1571
1572 module_init(video1394_init_module);
1573 module_exit(video1394_exit_module);