2 * cx18 mailbox functions
4 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
5 * Copyright (C) 2008 Andy Walls <awalls@radix.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 #include "cx18-driver.h"
29 #include "cx18-mailbox.h"
30 #include "cx18-queue.h"
31 #include "cx18-streams.h"
33 static const char *rpu_str[] = { "APU", "CPU", "EPU", "HPU" };
35 #define API_FAST (1 << 2) /* Short timeout */
36 #define API_SLOW (1 << 3) /* Additional 300ms timeout */
38 struct cx18_api_info {
40 u8 flags; /* Flags, see above */
41 u8 rpu; /* Processing unit */
42 const char *name; /* The name of the command */
45 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }
47 static const struct cx18_api_info api_info[] = {
48 /* MPEG encoder API */
49 API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0),
50 API_ENTRY(CPU, CX18_EPU_DEBUG, 0),
51 API_ENTRY(CPU, CX18_CREATE_TASK, 0),
52 API_ENTRY(CPU, CX18_DESTROY_TASK, 0),
53 API_ENTRY(CPU, CX18_CPU_CAPTURE_START, API_SLOW),
54 API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP, API_SLOW),
55 API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE, 0),
56 API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME, 0),
57 API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0),
58 API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 0),
59 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN, 0),
60 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE, 0),
61 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION, 0),
62 API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM, 0),
63 API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 0),
64 API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING, 0),
65 API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE, 0),
66 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS, 0),
67 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE, 0),
68 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE, 0),
69 API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS, 0),
70 API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM, API_SLOW),
71 API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO, 0),
72 API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT, 0),
73 API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID, 0),
74 API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID, 0),
75 API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE, 0),
76 API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE, 0),
77 API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION, 0),
78 API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO, 0),
79 API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME, 0),
80 API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM, 0),
81 API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER, 0),
82 API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS, 0),
83 API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK, 0),
84 API_ENTRY(CPU, CX18_CPU_DE_SET_MDL, API_FAST),
85 API_ENTRY(CPU, CX18_CPU_DE_RELEASE_MDL, API_SLOW),
86 API_ENTRY(APU, CX18_APU_RESETAI, 0),
87 API_ENTRY(CPU, CX18_CPU_DEBUG_PEEK32, 0),
91 static const struct cx18_api_info *find_api_info(u32 cmd)
95 for (i = 0; api_info[i].cmd; i++)
96 if (api_info[i].cmd == cmd)
101 static void dump_mb(struct cx18 *cx, struct cx18_mailbox *mb, char *name)
103 char argstr[MAX_MB_ARGUMENTS*11+1];
107 if (!(cx18_debug & CX18_DBGFLG_API))
110 for (i = 0, p = argstr; i < MAX_MB_ARGUMENTS; i++, p += 11) {
111 /* kernel snprintf() appends '\0' always */
112 snprintf(p, 12, " %#010x", mb->args[i]);
114 CX18_DEBUG_API("%s: req %#010x ack %#010x cmd %#010x err %#010x args%s"
115 "\n", name, mb->request, mb->ack, mb->cmd, mb->error, argstr);
120 * Functions that run in a work_queue work handling context
123 static void epu_dma_done(struct cx18 *cx, struct cx18_epu_work_order *order)
125 u32 handle, mdl_ack_count, id;
126 struct cx18_mailbox *mb;
127 struct cx18_mdl_ack *mdl_ack;
128 struct cx18_stream *s;
129 struct cx18_buffer *buf;
133 handle = mb->args[0];
134 s = cx18_handle_to_stream(cx, handle);
137 CX18_WARN("Got DMA done notification for unknown/inactive"
138 " handle %d, %s mailbox seq no %d\n", handle,
139 (order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) ?
140 "stale" : "good", mb->request);
144 mdl_ack_count = mb->args[2];
145 mdl_ack = order->mdl_ack;
146 for (i = 0; i < mdl_ack_count; i++, mdl_ack++) {
149 * Simple integrity check for processing a stale (and possibly
150 * inconsistent mailbox): make sure the buffer id is in the
151 * valid range for the stream.
153 * We go through the trouble of dealing with stale mailboxes
154 * because most of the time, the mailbox data is still valid and
155 * unchanged (and in practice the firmware ping-pongs the
156 * two mdl_ack buffers so mdl_acks are not stale).
158 * There are occasions when we get a half changed mailbox,
159 * which this check catches for a handle & id mismatch. If the
160 * handle and id do correspond, the worst case is that we
161 * completely lost the old buffer, but pick up the new buffer
162 * early (but the new mdl_ack is guaranteed to be good in this
163 * case as the firmware wouldn't point us to a new mdl_ack until
166 * cx18_queue_get buf() will detect the lost buffers
167 * and send them back to q_free for fw rotation eventually.
169 if ((order->flags & CX18_F_EWO_MB_STALE_UPON_RECEIPT) &&
170 !(id >= s->mdl_offset &&
171 id < (s->mdl_offset + s->buffers))) {
172 CX18_WARN("Fell behind! Ignoring stale mailbox with "
173 " inconsistent data. Lost buffer for mailbox "
174 "seq no %d\n", mb->request);
177 buf = cx18_queue_get_buf(s, id, mdl_ack->data_used);
179 CX18_DEBUG_HI_DMA("DMA DONE for %s (buffer %d)\n", s->name, id);
181 CX18_WARN("Could not find buf %d for stream %s\n",
183 /* Put as many buffers as possible back into fw use */
184 cx18_stream_load_fw_queue(s);
188 if (s->type == CX18_ENC_STREAM_TYPE_TS && s->dvb.enabled) {
189 CX18_DEBUG_HI_DMA("TS recv bytesused = %d\n",
191 dvb_dmx_swfilter(&s->dvb.demux, buf->buf,
194 /* Put as many buffers as possible back into fw use */
195 cx18_stream_load_fw_queue(s);
196 /* Put back TS buffer, since it was removed from all queues */
197 if (s->type == CX18_ENC_STREAM_TYPE_TS)
198 cx18_stream_put_buf_fw(s, buf);
200 wake_up(&cx->dma_waitq);
205 static void epu_debug(struct cx18 *cx, struct cx18_epu_work_order *order)
208 char *str = order->str;
210 CX18_DEBUG_INFO("%x %s\n", order->mb.args[0], str);
211 p = strchr(str, '.');
212 if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags) && p && p > str)
213 CX18_INFO("FW version: %s\n", p - 1);
216 static void epu_cmd(struct cx18 *cx, struct cx18_epu_work_order *order)
218 switch (order->rpu) {
221 switch (order->mb.cmd) {
222 case CX18_EPU_DMA_DONE:
223 epu_dma_done(cx, order);
226 epu_debug(cx, order);
229 CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n",
236 CX18_WARN("Unknown APU to EPU mailbox command %#0x\n",
245 void free_epu_work_order(struct cx18 *cx, struct cx18_epu_work_order *order)
247 atomic_set(&order->pending, 0);
250 void cx18_epu_work_handler(struct work_struct *work)
252 struct cx18_epu_work_order *order =
253 container_of(work, struct cx18_epu_work_order, work);
254 struct cx18 *cx = order->cx;
256 free_epu_work_order(cx, order);
261 * Functions that run in an interrupt handling context
264 static void mb_ack_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
266 struct cx18_mailbox __iomem *ack_mb;
269 switch (order->rpu) {
271 ack_irq = IRQ_EPU_TO_APU_ACK;
272 ack_mb = &cx->scb->apu2epu_mb;
275 ack_irq = IRQ_EPU_TO_CPU_ACK;
276 ack_mb = &cx->scb->cpu2epu_mb;
279 CX18_WARN("Unhandled RPU (%d) for command %x ack\n",
280 order->rpu, order->mb.cmd);
284 req = order->mb.request;
285 /* Don't ack if the RPU has gotten impatient and timed us out */
286 if (req != cx18_readl(cx, &ack_mb->request) ||
287 req == cx18_readl(cx, &ack_mb->ack)) {
288 CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
289 "incoming %s to EPU mailbox (sequence no. %u) "
290 "while processing\n",
291 rpu_str[order->rpu], rpu_str[order->rpu], req);
292 order->flags |= CX18_F_EWO_MB_STALE_WHILE_PROC;
295 cx18_writel(cx, req, &ack_mb->ack);
296 cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq);
300 static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
302 u32 handle, mdl_ack_offset, mdl_ack_count;
303 struct cx18_mailbox *mb;
306 handle = mb->args[0];
307 mdl_ack_offset = mb->args[1];
308 mdl_ack_count = mb->args[2];
310 if (handle == CX18_INVALID_TASK_HANDLE ||
311 mdl_ack_count == 0 || mdl_ack_count > CX18_MAX_MDL_ACKS) {
312 if ((order->flags & CX18_F_EWO_MB_STALE) == 0)
313 mb_ack_irq(cx, order);
317 cx18_memcpy_fromio(cx, order->mdl_ack, cx->enc_mem + mdl_ack_offset,
318 sizeof(struct cx18_mdl_ack) * mdl_ack_count);
320 if ((order->flags & CX18_F_EWO_MB_STALE) == 0)
321 mb_ack_irq(cx, order);
326 int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
329 char *str = order->str;
332 str_offset = order->mb.args[1];
334 cx18_setup_page(cx, str_offset);
335 cx18_memcpy_fromio(cx, str, cx->enc_mem + str_offset, 252);
337 cx18_setup_page(cx, SCB_OFFSET);
340 if ((order->flags & CX18_F_EWO_MB_STALE) == 0)
341 mb_ack_irq(cx, order);
343 return str_offset ? 1 : 0;
347 int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order)
351 switch (order->rpu) {
354 switch (order->mb.cmd) {
355 case CX18_EPU_DMA_DONE:
356 ret = epu_dma_done_irq(cx, order);
359 ret = epu_debug_irq(cx, order);
362 CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n",
369 CX18_WARN("Unknown APU to EPU mailbox command %#0x\n",
379 struct cx18_epu_work_order *alloc_epu_work_order_irq(struct cx18 *cx)
382 struct cx18_epu_work_order *order = NULL;
384 for (i = 0; i < CX18_MAX_EPU_WORK_ORDERS; i++) {
386 * We only need "pending" atomic to inspect its contents,
387 * and need not do a check and set because:
388 * 1. Any work handler thread only clears "pending" and only
389 * on one, particular work order at a time, per handler thread.
390 * 2. "pending" is only set here, and we're serialized because
391 * we're called in an IRQ handler context.
393 if (atomic_read(&cx->epu_work_order[i].pending) == 0) {
394 order = &cx->epu_work_order[i];
395 atomic_set(&order->pending, 1);
402 void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu)
404 struct cx18_mailbox __iomem *mb;
405 struct cx18_mailbox *order_mb;
406 struct cx18_epu_work_order *order;
411 mb = &cx->scb->cpu2epu_mb;
414 mb = &cx->scb->apu2epu_mb;
420 order = alloc_epu_work_order_irq(cx);
422 CX18_WARN("Unable to find blank work order form to schedule "
423 "incoming mailbox command processing\n");
429 order_mb = &order->mb;
431 /* mb->cmd and mb->args[0] through mb->args[2] */
432 cx18_memcpy_fromio(cx, &order_mb->cmd, &mb->cmd, 4 * sizeof(u32));
433 /* mb->request and mb->ack. N.B. we want to read mb->ack last */
434 cx18_memcpy_fromio(cx, &order_mb->request, &mb->request,
437 if (order_mb->request == order_mb->ack) {
438 CX18_DEBUG_WARN("Possibly falling behind: %s self-ack'ed our "
439 "incoming %s to EPU mailbox (sequence no. %u)"
441 rpu_str[rpu], rpu_str[rpu], order_mb->request);
442 dump_mb(cx, order_mb, "incoming");
443 order->flags = CX18_F_EWO_MB_STALE_UPON_RECEIPT;
447 * Individual EPU command processing is responsible for ack-ing
448 * a non-stale mailbox as soon as possible
450 submit = epu_cmd_irq(cx, order);
452 queue_work(cx->work_queue, &order->work);
458 * Functions called from a non-interrupt, non work_queue context
461 static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
463 const struct cx18_api_info *info = find_api_info(cmd);
464 u32 state, irq, req, ack, err;
465 struct cx18_mailbox __iomem *mb;
466 u32 __iomem *xpu_state;
467 wait_queue_head_t *waitq;
468 struct mutex *mb_lock;
469 long int timeout, ret;
473 CX18_WARN("unknown cmd %x\n", cmd);
477 if (cmd == CX18_CPU_DE_SET_MDL)
478 CX18_DEBUG_HI_API("%s\n", info->name);
480 CX18_DEBUG_API("%s\n", info->name);
484 waitq = &cx->mb_apu_waitq;
485 mb_lock = &cx->epu2apu_mb_lock;
486 irq = IRQ_EPU_TO_APU;
487 mb = &cx->scb->epu2apu_mb;
488 xpu_state = &cx->scb->apu_state;
491 waitq = &cx->mb_cpu_waitq;
492 mb_lock = &cx->epu2cpu_mb_lock;
493 irq = IRQ_EPU_TO_CPU;
494 mb = &cx->scb->epu2cpu_mb;
495 xpu_state = &cx->scb->cpu_state;
498 CX18_WARN("Unknown RPU (%d) for API call\n", info->rpu);
504 * Wait for an in-use mailbox to complete
506 * If the XPU is responding with Ack's, the mailbox shouldn't be in
507 * a busy state, since we serialize access to it on our end.
509 * If the wait for ack after sending a previous command was interrupted
510 * by a signal, we may get here and find a busy mailbox. After waiting,
511 * mark it "not busy" from our end, if the XPU hasn't ack'ed it still.
513 state = cx18_readl(cx, xpu_state);
514 req = cx18_readl(cx, &mb->request);
515 timeout = msecs_to_jiffies(10);
516 ret = wait_event_timeout(*waitq,
517 (ack = cx18_readl(cx, &mb->ack)) == req,
520 /* waited long enough, make the mbox "not busy" from our end */
521 cx18_writel(cx, req, &mb->ack);
522 CX18_ERR("mbox was found stuck busy when setting up for %s; "
523 "clearing busy and trying to proceed\n", info->name);
524 } else if (ret != timeout)
525 CX18_DEBUG_API("waited %u msecs for busy mbox to be acked\n",
526 jiffies_to_msecs(timeout-ret));
528 /* Build the outgoing mailbox */
529 req = ((req & 0xfffffffe) == 0xfffffffe) ? 1 : req + 1;
531 cx18_writel(cx, cmd, &mb->cmd);
532 for (i = 0; i < args; i++)
533 cx18_writel(cx, data[i], &mb->args[i]);
534 cx18_writel(cx, 0, &mb->error);
535 cx18_writel(cx, req, &mb->request);
536 cx18_writel(cx, req - 1, &mb->ack); /* ensure ack & req are distinct */
539 * Notify the XPU and wait for it to send an Ack back
541 timeout = msecs_to_jiffies((info->flags & API_FAST) ? 10 : 20);
543 CX18_DEBUG_HI_IRQ("sending interrupt SW1: %x to send %s\n",
545 cx18_write_reg_expect(cx, irq, SW1_INT_SET, irq, irq);
547 ret = wait_event_timeout(
549 cx18_readl(cx, &mb->ack) == cx18_readl(cx, &mb->request),
554 mutex_unlock(mb_lock);
555 CX18_DEBUG_WARN("sending %s timed out waiting %d msecs for RPU "
557 info->name, jiffies_to_msecs(timeout));
562 CX18_DEBUG_HI_API("waited %u msecs for %s to be acked\n",
563 jiffies_to_msecs(timeout-ret), info->name);
565 /* Collect data returned by the XPU */
566 for (i = 0; i < MAX_MB_ARGUMENTS; i++)
567 data[i] = cx18_readl(cx, &mb->args[i]);
568 err = cx18_readl(cx, &mb->error);
569 mutex_unlock(mb_lock);
572 * Wait for XPU to perform extra actions for the caller in some cases.
573 * e.g. CX18_CPU_DE_RELEASE_MDL will cause the CPU to send all buffers
574 * back in a burst shortly thereafter
576 if (info->flags & API_SLOW)
577 cx18_msleep_timeout(300, 0);
580 CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
582 return err ? -EIO : 0;
585 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
587 return cx18_api_call(cx, cmd, args, data);
590 static int cx18_set_filter_param(struct cx18_stream *s)
592 struct cx18 *cx = s->cx;
596 mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
597 ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
598 s->handle, 1, mode, cx->spatial_strength);
599 mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
600 ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
601 s->handle, 0, mode, cx->temporal_strength);
602 ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
603 s->handle, 2, cx->filter_mode >> 2, 0);
607 int cx18_api_func(void *priv, u32 cmd, int in, int out,
608 u32 data[CX2341X_MBOX_MAX_DATA])
610 struct cx18_api_func_private *api_priv = priv;
611 struct cx18 *cx = api_priv->cx;
612 struct cx18_stream *s = api_priv->s;
615 case CX2341X_ENC_SET_OUTPUT_PORT:
617 case CX2341X_ENC_SET_FRAME_RATE:
618 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
619 s->handle, 0, 0, 0, 0, data[0]);
620 case CX2341X_ENC_SET_FRAME_SIZE:
621 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
622 s->handle, data[1], data[0]);
623 case CX2341X_ENC_SET_STREAM_TYPE:
624 return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
626 case CX2341X_ENC_SET_ASPECT_RATIO:
627 return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
630 case CX2341X_ENC_SET_GOP_PROPERTIES:
631 return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
632 s->handle, data[0], data[1]);
633 case CX2341X_ENC_SET_GOP_CLOSURE:
635 case CX2341X_ENC_SET_AUDIO_PROPERTIES:
636 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
638 case CX2341X_ENC_MUTE_AUDIO:
639 return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
641 case CX2341X_ENC_SET_BIT_RATE:
642 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
643 s->handle, data[0], data[1], data[2], data[3]);
644 case CX2341X_ENC_MUTE_VIDEO:
645 return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
647 case CX2341X_ENC_SET_FRAME_DROP_RATE:
648 return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
650 case CX2341X_ENC_MISC:
651 return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
652 s->handle, data[0], data[1], data[2]);
653 case CX2341X_ENC_SET_DNR_FILTER_MODE:
654 cx->filter_mode = (data[0] & 3) | (data[1] << 2);
655 return cx18_set_filter_param(s);
656 case CX2341X_ENC_SET_DNR_FILTER_PROPS:
657 cx->spatial_strength = data[0];
658 cx->temporal_strength = data[1];
659 return cx18_set_filter_param(s);
660 case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
661 return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
662 s->handle, data[0], data[1]);
663 case CX2341X_ENC_SET_CORING_LEVELS:
664 return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
665 s->handle, data[0], data[1], data[2], data[3]);
667 CX18_WARN("Unknown cmd %x\n", cmd);
671 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
672 u32 cmd, int args, ...)
678 for (i = 0; i < args; i++)
679 data[i] = va_arg(ap, u32);
681 return cx18_api(cx, cmd, args, data);
684 int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
686 u32 data[MAX_MB_ARGUMENTS];
691 CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
694 if (args > MAX_MB_ARGUMENTS) {
695 CX18_ERR("args too big (cmd=%x)\n", cmd);
696 args = MAX_MB_ARGUMENTS;
699 for (i = 0; i < args; i++)
700 data[i] = va_arg(ap, u32);
702 return cx18_api(cx, cmd, args, data);