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ALSA: lx6464es - make 1 bit signed bitfield unsigned
[net-next-2.6.git] / sound / pci / lx6464es / lx_core.c
CommitLineData
02bec490
TB		 1/* -*- linux-c -*- *
2 *
3 * ALSA driver for the digigram lx6464es interface
4 * low-level interface
5 *
6 * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, write to
20 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 *
23 */
24
25/* #define RMH_DEBUG 1 */
26
27#include <linux/module.h>
28#include <linux/pci.h>
29#include <linux/delay.h>
30
31#include "lx6464es.h"
32#include "lx_core.h"
33
34/* low-level register access */
35
36static const unsigned long dsp_port_offsets[] = {
37 0,
38 0x400,
39 0x401,
40 0x402,
41 0x403,
42 0x404,
43 0x405,
44 0x406,
45 0x407,
46 0x408,
47 0x409,
48 0x40a,
49 0x40b,
50 0x40c,
51
52 0x410,
53 0x411,
54 0x412,
55 0x413,
56 0x414,
57 0x415,
58 0x416,
59
60 0x420,
61 0x430,
62 0x431,
63 0x432,
64 0x433,
65 0x434,
66 0x440
67};
68
69static void __iomem *lx_dsp_register(struct lx6464es *chip, int port)
70{
71 void __iomem *base_address = chip->port_dsp_bar;
72 return base_address + dsp_port_offsets[port]*4;
73}
74
75unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port)
76{
77 void __iomem *address = lx_dsp_register(chip, port);
78 return ioread32(address);
79}
80
81void lx_dsp_reg_readbuf(struct lx6464es *chip, int port, u32 *data, u32 len)
82{
83 void __iomem *address = lx_dsp_register(chip, port);
84 memcpy_fromio(data, address, len*sizeof(u32));
85}
86
87
88void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data)
89{
90 void __iomem *address = lx_dsp_register(chip, port);
91 iowrite32(data, address);
92}
93
94void lx_dsp_reg_writebuf(struct lx6464es *chip, int port, const u32 *data,
95 u32 len)
96{
97 void __iomem *address = lx_dsp_register(chip, port);
98 memcpy_toio(address, data, len*sizeof(u32));
99}
100
101
102static const unsigned long plx_port_offsets[] = {
103 0x04,
104 0x40,
105 0x44,
106 0x48,
107 0x4c,
108 0x50,
109 0x54,
110 0x58,
111 0x5c,
112 0x64,
113 0x68,
114 0x6C
115};
116
117static void __iomem *lx_plx_register(struct lx6464es *chip, int port)
118{
119 void __iomem *base_address = chip->port_plx_remapped;
120 return base_address + plx_port_offsets[port];
121}
122
123unsigned long lx_plx_reg_read(struct lx6464es *chip, int port)
124{
125 void __iomem *address = lx_plx_register(chip, port);
126 return ioread32(address);
127}
128
129void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data)
130{
131 void __iomem *address = lx_plx_register(chip, port);
132 iowrite32(data, address);
133}
134
135u32 lx_plx_mbox_read(struct lx6464es *chip, int mbox_nr)
136{
137 int index;
138
139 switch (mbox_nr) {
140 case 1:
141 index = ePLX_MBOX1; break;
142 case 2:
143 index = ePLX_MBOX2; break;
144 case 3:
145 index = ePLX_MBOX3; break;
146 case 4:
147 index = ePLX_MBOX4; break;
148 case 5:
149 index = ePLX_MBOX5; break;
150 case 6:
151 index = ePLX_MBOX6; break;
152 case 7:
153 index = ePLX_MBOX7; break;
154 case 0: /* reserved for HF flags */
155 snd_BUG();
156 default:
157 return 0xdeadbeef;
158 }
159
160 return lx_plx_reg_read(chip, index);
161}
162
163int lx_plx_mbox_write(struct lx6464es *chip, int mbox_nr, u32 value)
164{
165 int index = -1;
166
167 switch (mbox_nr) {
168 case 1:
169 index = ePLX_MBOX1; break;
170 case 3:
171 index = ePLX_MBOX3; break;
172 case 4:
173 index = ePLX_MBOX4; break;
174 case 5:
175 index = ePLX_MBOX5; break;
176 case 6:
177 index = ePLX_MBOX6; break;
178 case 7:
179 index = ePLX_MBOX7; break;
180 case 0: /* reserved for HF flags */
181 case 2: /* reserved for Pipe States
182 * the DSP keeps an image of it */
183 snd_BUG();
184 return -EBADRQC;
185 }
186
187 lx_plx_reg_write(chip, index, value);
188 return 0;
189}
190
191
192/* rmh */
193
194#ifdef CONFIG_SND_DEBUG
195#define CMD_NAME(a) a
196#else
197#define CMD_NAME(a) NULL
198#endif
199
200#define Reg_CSM_MR 0x00000002
201#define Reg_CSM_MC 0x00000001
202
203struct dsp_cmd_info {
204 u32 dcCodeOp; /* Op Code of the command (usually 1st 24-bits
205 * word).*/
206 u16 dcCmdLength; /* Command length in words of 24 bits.*/
207 u16 dcStatusType; /* Status type: 0 for fixed length, 1 for
208 * random. */
209 u16 dcStatusLength; /* Status length (if fixed).*/
210 char *dcOpName;
211};
212
213/*
214 Initialization and control data for the Microblaze interface
215 - OpCode:
216 the opcode field of the command set at the proper offset
217 - CmdLength
218 the number of command words
219 - StatusType
220 offset in the status registers: 0 means that the return value may be
221 different from 0, and must be read
222 - StatusLength
223 the number of status words (in addition to the return value)
224*/
225
226static struct dsp_cmd_info dsp_commands[] =
227{
228 { (CMD_00_INFO_DEBUG << OPCODE_OFFSET) , 1 /*custom*/
229 , 1 , 0 /**/ , CMD_NAME("INFO_DEBUG") },
230 { (CMD_01_GET_SYS_CFG << OPCODE_OFFSET) , 1 /**/
231 , 1 , 2 /**/ , CMD_NAME("GET_SYS_CFG") },
232 { (CMD_02_SET_GRANULARITY << OPCODE_OFFSET) , 1 /**/
233 , 1 , 0 /**/ , CMD_NAME("SET_GRANULARITY") },
234 { (CMD_03_SET_TIMER_IRQ << OPCODE_OFFSET) , 1 /**/
235 , 1 , 0 /**/ , CMD_NAME("SET_TIMER_IRQ") },
236 { (CMD_04_GET_EVENT << OPCODE_OFFSET) , 1 /**/
237 , 1 , 0 /*up to 10*/ , CMD_NAME("GET_EVENT") },
238 { (CMD_05_GET_PIPES << OPCODE_OFFSET) , 1 /**/
239 , 1 , 2 /*up to 4*/ , CMD_NAME("GET_PIPES") },
240 { (CMD_06_ALLOCATE_PIPE << OPCODE_OFFSET) , 1 /**/
241 , 0 , 0 /**/ , CMD_NAME("ALLOCATE_PIPE") },
242 { (CMD_07_RELEASE_PIPE << OPCODE_OFFSET) , 1 /**/
243 , 0 , 0 /**/ , CMD_NAME("RELEASE_PIPE") },
244 { (CMD_08_ASK_BUFFERS << OPCODE_OFFSET) , 1 /**/
245 , 1 , MAX_STREAM_BUFFER , CMD_NAME("ASK_BUFFERS") },
246 { (CMD_09_STOP_PIPE << OPCODE_OFFSET) , 1 /**/
247 , 0 , 0 /*up to 2*/ , CMD_NAME("STOP_PIPE") },
248 { (CMD_0A_GET_PIPE_SPL_COUNT << OPCODE_OFFSET) , 1 /**/
249 , 1 , 1 /*up to 2*/ , CMD_NAME("GET_PIPE_SPL_COUNT") },
250 { (CMD_0B_TOGGLE_PIPE_STATE << OPCODE_OFFSET) , 1 /*up to 5*/
251 , 1 , 0 /**/ , CMD_NAME("TOGGLE_PIPE_STATE") },
252 { (CMD_0C_DEF_STREAM << OPCODE_OFFSET) , 1 /*up to 4*/
253 , 1 , 0 /**/ , CMD_NAME("DEF_STREAM") },
254 { (CMD_0D_SET_MUTE << OPCODE_OFFSET) , 3 /**/
255 , 1 , 0 /**/ , CMD_NAME("SET_MUTE") },
256 { (CMD_0E_GET_STREAM_SPL_COUNT << OPCODE_OFFSET) , 1/**/
257 , 1 , 2 /**/ , CMD_NAME("GET_STREAM_SPL_COUNT") },
258 { (CMD_0F_UPDATE_BUFFER << OPCODE_OFFSET) , 3 /*up to 4*/
259 , 0 , 1 /**/ , CMD_NAME("UPDATE_BUFFER") },
260 { (CMD_10_GET_BUFFER << OPCODE_OFFSET) , 1 /**/
261 , 1 , 4 /**/ , CMD_NAME("GET_BUFFER") },
262 { (CMD_11_CANCEL_BUFFER << OPCODE_OFFSET) , 1 /**/
263 , 1 , 1 /*up to 4*/ , CMD_NAME("CANCEL_BUFFER") },
264 { (CMD_12_GET_PEAK << OPCODE_OFFSET) , 1 /**/
265 , 1 , 1 /**/ , CMD_NAME("GET_PEAK") },
266 { (CMD_13_SET_STREAM_STATE << OPCODE_OFFSET) , 1 /**/
267 , 1 , 0 /**/ , CMD_NAME("SET_STREAM_STATE") },
268};
269
270static void lx_message_init(struct lx_rmh *rmh, enum cmd_mb_opcodes cmd)
271{
272 snd_BUG_ON(cmd >= CMD_14_INVALID);
273
274 rmh->cmd[0] = dsp_commands[cmd].dcCodeOp;
275 rmh->cmd_len = dsp_commands[cmd].dcCmdLength;
276 rmh->stat_len = dsp_commands[cmd].dcStatusLength;
277 rmh->dsp_stat = dsp_commands[cmd].dcStatusType;
278 rmh->cmd_idx = cmd;
279 memset(&rmh->cmd[1], 0, (REG_CRM_NUMBER - 1) * sizeof(u32));
280
281#ifdef CONFIG_SND_DEBUG
282 memset(rmh->stat, 0, REG_CRM_NUMBER * sizeof(u32));
283#endif
284#ifdef RMH_DEBUG
285 rmh->cmd_idx = cmd;
286#endif
287}
288
289#ifdef RMH_DEBUG
290#define LXRMH "lx6464es rmh: "
291static void lx_message_dump(struct lx_rmh *rmh)
292{
293 u8 idx = rmh->cmd_idx;
294 int i;
295
296 snd_printk(LXRMH "command %s\n", dsp_commands[idx].dcOpName);
297
298 for (i = 0; i != rmh->cmd_len; ++i)
299 snd_printk(LXRMH "\tcmd[%d] %08x\n", i, rmh->cmd[i]);
300
301 for (i = 0; i != rmh->stat_len; ++i)
302 snd_printk(LXRMH "\tstat[%d]: %08x\n", i, rmh->stat[i]);
303 snd_printk("\n");
304}
305#else
306static inline void lx_message_dump(struct lx_rmh *rmh)
307{}
308#endif
309
310
311
312/* sleep 500 - 100 = 400 times 100us -> the timeout is >= 40 ms */
313#define XILINX_TIMEOUT_MS 40
314#define XILINX_POLL_NO_SLEEP 100
315#define XILINX_POLL_ITERATIONS 150
316
02bec490
TB		 317
318static int lx_message_send_atomic(struct lx6464es *chip, struct lx_rmh *rmh)
319{
320 u32 reg = ED_DSP_TIMED_OUT;
321 int dwloop;
322
323 if (lx_dsp_reg_read(chip, eReg_CSM) & (Reg_CSM_MC | Reg_CSM_MR)) {
324 snd_printk(KERN_ERR LXP "PIOSendMessage eReg_CSM %x\n", reg);
325 return -EBUSY;
326 }
327
328 /* write command */
329 lx_dsp_reg_writebuf(chip, eReg_CRM1, rmh->cmd, rmh->cmd_len);
330
331 /* MicoBlaze gogogo */
332 lx_dsp_reg_write(chip, eReg_CSM, Reg_CSM_MC);
333
95eff499 334 /* wait for device to answer */
02bec490
TB		 335 for (dwloop = 0; dwloop != XILINX_TIMEOUT_MS * 1000; ++dwloop) {
336 if (lx_dsp_reg_read(chip, eReg_CSM) & Reg_CSM_MR) {
337 if (rmh->dsp_stat == 0)
338 reg = lx_dsp_reg_read(chip, eReg_CRM1);
339 else
340 reg = 0;
341 goto polling_successful;
342 } else
343 udelay(1);
344 }
345 snd_printk(KERN_WARNING LXP "TIMEOUT lx_message_send_atomic! "
346 "polling failed\n");
347
348polling_successful:
349 if ((reg & ERROR_VALUE) == 0) {
350 /* read response */
351 if (rmh->stat_len) {
352 snd_BUG_ON(rmh->stat_len >= (REG_CRM_NUMBER-1));
353 lx_dsp_reg_readbuf(chip, eReg_CRM2, rmh->stat,
354 rmh->stat_len);
355 }
356 } else
357 snd_printk(LXP "rmh error: %08x\n", reg);
358
359 /* clear Reg_CSM_MR */
360 lx_dsp_reg_write(chip, eReg_CSM, 0);
361
362 switch (reg) {
363 case ED_DSP_TIMED_OUT:
364 snd_printk(KERN_WARNING LXP "lx_message_send: dsp timeout\n");
365 return -ETIMEDOUT;
366
367 case ED_DSP_CRASHED:
368 snd_printk(KERN_WARNING LXP "lx_message_send: dsp crashed\n");
369 return -EAGAIN;
370 }
371
372 lx_message_dump(rmh);
373
374 return reg;
375}
376
377
378/* low-level dsp access */
379int __devinit lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version)
380{
381 u16 ret;
382 unsigned long flags;
383
384 spin_lock_irqsave(&chip->msg_lock, flags);
385
386 lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
387 ret = lx_message_send_atomic(chip, &chip->rmh);
388
389 *rdsp_version = chip->rmh.stat[1];
390 spin_unlock_irqrestore(&chip->msg_lock, flags);
391 return ret;
392}
393
394int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq)
395{
396 u16 ret = 0;
397 unsigned long flags;
398 u32 freq_raw = 0;
399 u32 freq = 0;
400 u32 frequency = 0;
401
402 spin_lock_irqsave(&chip->msg_lock, flags);
403
404 lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
405 ret = lx_message_send_atomic(chip, &chip->rmh);
406
407 if (ret == 0) {
408 freq_raw = chip->rmh.stat[0] >> FREQ_FIELD_OFFSET;
409 freq = freq_raw & XES_FREQ_COUNT8_MASK;
410
411 if ((freq < XES_FREQ_COUNT8_48_MAX) ||
412 (freq > XES_FREQ_COUNT8_44_MIN))
413 frequency = 0; /* unknown */
414 else if (freq >= XES_FREQ_COUNT8_44_MAX)
415 frequency = 44100;
416 else
417 frequency = 48000;
418 }
419
420 spin_unlock_irqrestore(&chip->msg_lock, flags);
421
422 *rfreq = frequency * chip->freq_ratio;
423
424 return ret;
425}
426
427int lx_dsp_get_mac(struct lx6464es *chip, u8 *mac_address)
428{
429 u32 macmsb, maclsb;
430
431 macmsb = lx_dsp_reg_read(chip, eReg_ADMACESMSB) & 0x00FFFFFF;
432 maclsb = lx_dsp_reg_read(chip, eReg_ADMACESLSB) & 0x00FFFFFF;
433
434 /* todo: endianess handling */
435 mac_address[5] = ((u8 *)(&maclsb))[0];
436 mac_address[4] = ((u8 *)(&maclsb))[1];
437 mac_address[3] = ((u8 *)(&maclsb))[2];
438 mac_address[2] = ((u8 *)(&macmsb))[0];
439 mac_address[1] = ((u8 *)(&macmsb))[1];
440 mac_address[0] = ((u8 *)(&macmsb))[2];
441
442 return 0;
443}
444
445
446int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran)
447{
448 unsigned long flags;
449 int ret;
450
451 spin_lock_irqsave(&chip->msg_lock, flags);
452
453 lx_message_init(&chip->rmh, CMD_02_SET_GRANULARITY);
454 chip->rmh.cmd[0] |= gran;
455
456 ret = lx_message_send_atomic(chip, &chip->rmh);
457 spin_unlock_irqrestore(&chip->msg_lock, flags);
458 return ret;
459}
460
461int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data)
462{
463 unsigned long flags;
464 int ret;
465
466 spin_lock_irqsave(&chip->msg_lock, flags);
467
468 lx_message_init(&chip->rmh, CMD_04_GET_EVENT);
469 chip->rmh.stat_len = 9; /* we don't necessarily need the full length */
470
471 ret = lx_message_send_atomic(chip, &chip->rmh);
472
473 if (!ret)
474 memcpy(data, chip->rmh.stat, chip->rmh.stat_len * sizeof(u32));
475
476 spin_unlock_irqrestore(&chip->msg_lock, flags);
477 return ret;
478}
479
480#define CSES_TIMEOUT 100 /* microseconds */
481#define CSES_CE 0x0001
482#define CSES_BROADCAST 0x0002
483#define CSES_UPDATE_LDSV 0x0004
484
485int lx_dsp_es_check_pipeline(struct lx6464es *chip)
486{
487 int i;
488
489 for (i = 0; i != CSES_TIMEOUT; ++i) {
490 /*
491 * le bit CSES_UPDATE_LDSV est à 1 dés que le macprog
492 * est pret. il re-passe à 0 lorsque le premier read a
493 * été fait. pour l'instant on retire le test car ce bit
494 * passe a 1 environ 200 à 400 ms aprés que le registre
495 * confES à été écrit (kick du xilinx ES).
496 *
497 * On ne teste que le bit CE.
498 * */
499
500 u32 cses = lx_dsp_reg_read(chip, eReg_CSES);
501
502 if ((cses & CSES_CE) == 0)
503 return 0;
504
505 udelay(1);
506 }
507
508 return -ETIMEDOUT;
509}
510
511
512#define PIPE_INFO_TO_CMD(capture, pipe) \
513 ((u32)((u32)(pipe) | ((capture) ? ID_IS_CAPTURE : 0L)) << ID_OFFSET)
514
515
516
517/* low-level pipe handling */
518int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture,
519 int channels)
520{
521 int err;
522 unsigned long flags;
523
524 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
525
526 spin_lock_irqsave(&chip->msg_lock, flags);
527 lx_message_init(&chip->rmh, CMD_06_ALLOCATE_PIPE);
528
529 chip->rmh.cmd[0] |= pipe_cmd;
530 chip->rmh.cmd[0] |= channels;
531
532 err = lx_message_send_atomic(chip, &chip->rmh);
533 spin_unlock_irqrestore(&chip->msg_lock, flags);
534
535 if (err != 0)
536 snd_printk(KERN_ERR "lx6464es: could not allocate pipe\n");
537
538 return err;
539}
540
541int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture)
542{
543 int err;
544 unsigned long flags;
545
546 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
547
548 spin_lock_irqsave(&chip->msg_lock, flags);
549 lx_message_init(&chip->rmh, CMD_07_RELEASE_PIPE);
550
551 chip->rmh.cmd[0] |= pipe_cmd;
552
553 err = lx_message_send_atomic(chip, &chip->rmh);
554 spin_unlock_irqrestore(&chip->msg_lock, flags);
555
556 return err;
557}
558
559int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
560 u32 *r_needed, u32 *r_freed, u32 *size_array)
561{
562 int err;
563 unsigned long flags;
564
565 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
566
567#ifdef CONFIG_SND_DEBUG
568 if (size_array)
569 memset(size_array, 0, sizeof(u32)*MAX_STREAM_BUFFER);
570#endif
571
572 *r_needed = 0;
573 *r_freed = 0;
574
575 spin_lock_irqsave(&chip->msg_lock, flags);
576 lx_message_init(&chip->rmh, CMD_08_ASK_BUFFERS);
577
578 chip->rmh.cmd[0] |= pipe_cmd;
579
580 err = lx_message_send_atomic(chip, &chip->rmh);
581
582 if (!err) {
583 int i;
584 for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
585 u32 stat = chip->rmh.stat[i];
586 if (stat & (BF_EOB << BUFF_FLAGS_OFFSET)) {
587 /* finished */
588 *r_freed += 1;
589 if (size_array)
590 size_array[i] = stat & MASK_DATA_SIZE;
591 } else if ((stat & (BF_VALID << BUFF_FLAGS_OFFSET))
592 == 0)
593 /* free */
594 *r_needed += 1;
595 }
596
597#if 0
598 snd_printdd(LXP "CMD_08_ASK_BUFFERS: needed %d, freed %d\n",
599 *r_needed, *r_freed);
600 for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
601 for (i = 0; i != chip->rmh.stat_len; ++i)
602 snd_printdd(" stat[%d]: %x, %x\n", i,
603 chip->rmh.stat[i],
604 chip->rmh.stat[i] & MASK_DATA_SIZE);
605 }
606#endif
607 }
608
609 spin_unlock_irqrestore(&chip->msg_lock, flags);
610 return err;
611}
612
613
614int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture)
615{
616 int err;
617 unsigned long flags;
618
619 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
620
621 spin_lock_irqsave(&chip->msg_lock, flags);
622 lx_message_init(&chip->rmh, CMD_09_STOP_PIPE);
623
624 chip->rmh.cmd[0] |= pipe_cmd;
625
626 err = lx_message_send_atomic(chip, &chip->rmh);
627
628 spin_unlock_irqrestore(&chip->msg_lock, flags);
629 return err;
630}
631
632static int lx_pipe_toggle_state(struct lx6464es *chip, u32 pipe, int is_capture)
633{
634 int err;
635 unsigned long flags;
636
637 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
638
639 spin_lock_irqsave(&chip->msg_lock, flags);
640 lx_message_init(&chip->rmh, CMD_0B_TOGGLE_PIPE_STATE);
641
642 chip->rmh.cmd[0] |= pipe_cmd;
643
644 err = lx_message_send_atomic(chip, &chip->rmh);
645
646 spin_unlock_irqrestore(&chip->msg_lock, flags);
647 return err;
648}
649
650
651int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture)
652{
653 int err;
654
655 err = lx_pipe_wait_for_idle(chip, pipe, is_capture);
656 if (err < 0)
657 return err;
658
659 err = lx_pipe_toggle_state(chip, pipe, is_capture);
660
661 return err;
662}
663
664int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture)
665{
666 int err = 0;
667
668 err = lx_pipe_wait_for_start(chip, pipe, is_capture);
669 if (err < 0)
670 return err;
671
672 err = lx_pipe_toggle_state(chip, pipe, is_capture);
673
674 return err;
675}
676
677
678int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture,
679 u64 *rsample_count)
680{
681 int err;
682 unsigned long flags;
683
684 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
685
686 spin_lock_irqsave(&chip->msg_lock, flags);
687 lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
688
689 chip->rmh.cmd[0] |= pipe_cmd;
690 chip->rmh.stat_len = 2; /* need all words here! */
691
692 err = lx_message_send_atomic(chip, &chip->rmh); /* don't sleep! */
693
694 if (err != 0)
695 snd_printk(KERN_ERR
696 "lx6464es: could not query pipe's sample count\n");
697 else {
698 *rsample_count = ((u64)(chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
699 << 24) /* hi part */
700 + chip->rmh.stat[1]; /* lo part */
701 }
702
703 spin_unlock_irqrestore(&chip->msg_lock, flags);
704 return err;
705}
706
707int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate)
708{
709 int err;
710 unsigned long flags;
711
712 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
713
714 spin_lock_irqsave(&chip->msg_lock, flags);
715 lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
716
717 chip->rmh.cmd[0] |= pipe_cmd;
718
719 err = lx_message_send_atomic(chip, &chip->rmh);
720
721 if (err != 0)
722 snd_printk(KERN_ERR "lx6464es: could not query pipe's state\n");
723 else
724 *rstate = (chip->rmh.stat[0] >> PSTATE_OFFSET) & 0x0F;
725
726 spin_unlock_irqrestore(&chip->msg_lock, flags);
727 return err;
728}
729
730static int lx_pipe_wait_for_state(struct lx6464es *chip, u32 pipe,
731 int is_capture, u16 state)
732{
733 int i;
734
735 /* max 2*PCMOnlyGranularity = 2*1024 at 44100 = < 50 ms:
736 * timeout 50 ms */
737 for (i = 0; i != 50; ++i) {
738 u16 current_state;
739 int err = lx_pipe_state(chip, pipe, is_capture, &current_state);
740
741 if (err < 0)
742 return err;
743
744 if (current_state == state)
745 return 0;
746
747 mdelay(1);
748 }
749
750 return -ETIMEDOUT;
751}
752
753int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture)
754{
755 return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_RUN);
756}
757
758int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture)
759{
760 return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_IDLE);
761}
762
763/* low-level stream handling */
764int lx_stream_set_state(struct lx6464es *chip, u32 pipe,
765 int is_capture, enum stream_state_t state)
766{
767 int err;
768 unsigned long flags;
769
770 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
771
772 spin_lock_irqsave(&chip->msg_lock, flags);
773 lx_message_init(&chip->rmh, CMD_13_SET_STREAM_STATE);
774
775 chip->rmh.cmd[0] |= pipe_cmd;
776 chip->rmh.cmd[0] |= state;
777
778 err = lx_message_send_atomic(chip, &chip->rmh);
779 spin_unlock_irqrestore(&chip->msg_lock, flags);
780
781 return err;
782}
783
784int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime,
785 u32 pipe, int is_capture)
786{
787 int err;
788 unsigned long flags;
789
790 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
791
792 u32 channels = runtime->channels;
793
794 if (runtime->channels != channels)
795 snd_printk(KERN_ERR LXP "channel count mismatch: %d vs %d",
796 runtime->channels, channels);
797
798 spin_lock_irqsave(&chip->msg_lock, flags);
799 lx_message_init(&chip->rmh, CMD_0C_DEF_STREAM);
800
801 chip->rmh.cmd[0] |= pipe_cmd;
802
803 if (runtime->sample_bits == 16)
804 /* 16 bit format */
805 chip->rmh.cmd[0] |= (STREAM_FMT_16b << STREAM_FMT_OFFSET);
806
807 if (snd_pcm_format_little_endian(runtime->format))
808 /* little endian/intel format */
809 chip->rmh.cmd[0] |= (STREAM_FMT_intel << STREAM_FMT_OFFSET);
810
811 chip->rmh.cmd[0] |= channels-1;
812
813 err = lx_message_send_atomic(chip, &chip->rmh);
814 spin_unlock_irqrestore(&chip->msg_lock, flags);
815
816 return err;
817}
818
819int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture,
820 int *rstate)
821{
822 int err;
823 unsigned long flags;
824
825 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
826
827 spin_lock_irqsave(&chip->msg_lock, flags);
828 lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
829
830 chip->rmh.cmd[0] |= pipe_cmd;
831
832 err = lx_message_send_atomic(chip, &chip->rmh);
833
834 *rstate = (chip->rmh.stat[0] & SF_START) ? START_STATE : PAUSE_STATE;
835
836 spin_unlock_irqrestore(&chip->msg_lock, flags);
837 return err;
838}
839
840int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture,
841 u64 *r_bytepos)
842{
843 int err;
844 unsigned long flags;
845
846 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
847
848 spin_lock_irqsave(&chip->msg_lock, flags);
849 lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
850
851 chip->rmh.cmd[0] |= pipe_cmd;
852
853 err = lx_message_send_atomic(chip, &chip->rmh);
854
855 *r_bytepos = ((u64) (chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
856 << 32) /* hi part */
857 + chip->rmh.stat[1]; /* lo part */
858
859 spin_unlock_irqrestore(&chip->msg_lock, flags);
860 return err;
861}
862
863/* low-level buffer handling */
864int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture,
865 u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi,
866 u32 *r_buffer_index)
867{
868 int err;
869 unsigned long flags;
870
871 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
872
873 spin_lock_irqsave(&chip->msg_lock, flags);
874 lx_message_init(&chip->rmh, CMD_0F_UPDATE_BUFFER);
875
876 chip->rmh.cmd[0] |= pipe_cmd;
877 chip->rmh.cmd[0] |= BF_NOTIFY_EOB; /* request interrupt notification */
878
879 /* todo: pause request, circular buffer */
880
881 chip->rmh.cmd[1] = buffer_size & MASK_DATA_SIZE;
882 chip->rmh.cmd[2] = buf_address_lo;
883
884 if (buf_address_hi) {
885 chip->rmh.cmd_len = 4;
886 chip->rmh.cmd[3] = buf_address_hi;
887 chip->rmh.cmd[0] |= BF_64BITS_ADR;
888 }
889
890 err = lx_message_send_atomic(chip, &chip->rmh);
891
892 if (err == 0) {
893 *r_buffer_index = chip->rmh.stat[0];
894 goto done;
895 }
896
897 if (err == EB_RBUFFERS_TABLE_OVERFLOW)
898 snd_printk(LXP "lx_buffer_give EB_RBUFFERS_TABLE_OVERFLOW\n");
899
900 if (err == EB_INVALID_STREAM)
901 snd_printk(LXP "lx_buffer_give EB_INVALID_STREAM\n");
902
903 if (err == EB_CMD_REFUSED)
904 snd_printk(LXP "lx_buffer_give EB_CMD_REFUSED\n");
905
906 done:
907 spin_unlock_irqrestore(&chip->msg_lock, flags);
908 return err;
909}
910
911int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture,
912 u32 *r_buffer_size)
913{
914 int err;
915 unsigned long flags;
916
917 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
918
919 spin_lock_irqsave(&chip->msg_lock, flags);
920 lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
921
922 chip->rmh.cmd[0] |= pipe_cmd;
923 chip->rmh.cmd[0] |= MASK_BUFFER_ID; /* ask for the current buffer: the
924 * microblaze will seek for it */
925
926 err = lx_message_send_atomic(chip, &chip->rmh);
927
928 if (err == 0)
929 *r_buffer_size = chip->rmh.stat[0] & MASK_DATA_SIZE;
930
931 spin_unlock_irqrestore(&chip->msg_lock, flags);
932 return err;
933}
934
935int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture,
936 u32 buffer_index)
937{
938 int err;
939 unsigned long flags;
940
941 u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
942
943 spin_lock_irqsave(&chip->msg_lock, flags);
944 lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
945
946 chip->rmh.cmd[0] |= pipe_cmd;
947 chip->rmh.cmd[0] |= buffer_index;
948
949 err = lx_message_send_atomic(chip, &chip->rmh);
950
951 spin_unlock_irqrestore(&chip->msg_lock, flags);
952 return err;
953}
954
955
956/* low-level gain/peak handling
957 *
958 * \todo: can we unmute capture/playback channels independently?
959 *
960 * */
961int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute)
962{
963 int err;
964 unsigned long flags;
965
966 /* bit set to 1: channel muted */
967 u64 mute_mask = unmute ? 0 : 0xFFFFFFFFFFFFFFFFLLU;
968
969 spin_lock_irqsave(&chip->msg_lock, flags);
970 lx_message_init(&chip->rmh, CMD_0D_SET_MUTE);
971
972 chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, 0);
973
974 chip->rmh.cmd[1] = (u32)(mute_mask >> (u64)32); /* hi part */
975 chip->rmh.cmd[2] = (u32)(mute_mask & (u64)0xFFFFFFFF); /* lo part */
976
977 snd_printk("mute %x %x %x\n", chip->rmh.cmd[0], chip->rmh.cmd[1],
978 chip->rmh.cmd[2]);
979
980 err = lx_message_send_atomic(chip, &chip->rmh);
981
982 spin_unlock_irqrestore(&chip->msg_lock, flags);
983 return err;
984}
985
986static u32 peak_map[] = {
987 0x00000109, /* -90.308dB */
988 0x0000083B, /* -72.247dB */
989 0x000020C4, /* -60.205dB */
990 0x00008273, /* -48.030dB */
991 0x00020756, /* -36.005dB */
992 0x00040C37, /* -30.001dB */
993 0x00081385, /* -24.002dB */
994 0x00101D3F, /* -18.000dB */
995 0x0016C310, /* -15.000dB */
996 0x002026F2, /* -12.001dB */
997 0x002D6A86, /* -9.000dB */
998 0x004026E6, /* -6.004dB */
999 0x005A9DF6, /* -3.000dB */
1000 0x0065AC8B, /* -2.000dB */
1001 0x00721481, /* -1.000dB */
1002 0x007FFFFF, /* FS */
1003};
1004
1005int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels,
1006 u32 *r_levels)
1007{
1008 int err = 0;
1009 unsigned long flags;
1010 int i;
1011 spin_lock_irqsave(&chip->msg_lock, flags);
1012
1013 for (i = 0; i < channels; i += 4) {
1014 u32 s0, s1, s2, s3;
1015
1016 lx_message_init(&chip->rmh, CMD_12_GET_PEAK);
1017 chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, i);
1018
1019 err = lx_message_send_atomic(chip, &chip->rmh);
1020
1021 if (err == 0) {
1022 s0 = peak_map[chip->rmh.stat[0] & 0x0F];
1023 s1 = peak_map[(chip->rmh.stat[0] >> 4) & 0xf];
1024 s2 = peak_map[(chip->rmh.stat[0] >> 8) & 0xf];
1025 s3 = peak_map[(chip->rmh.stat[0] >> 12) & 0xf];
1026 } else
1027 s0 = s1 = s2 = s3 = 0;
1028
1029 r_levels[0] = s0;
1030 r_levels[1] = s1;
1031 r_levels[2] = s2;
1032 r_levels[3] = s3;
1033
1034 r_levels += 4;
1035 }
1036
1037 spin_unlock_irqrestore(&chip->msg_lock, flags);
1038 return err;
1039}
1040
1041/* interrupt handling */
1042#define PCX_IRQ_NONE 0
1043#define IRQCS_ACTIVE_PCIDB 0x00002000L /* Bit nÃ\83¸ 13 */
1044#define IRQCS_ENABLE_PCIIRQ 0x00000100L /* Bit nÃ\83¸ 08 */
1045#define IRQCS_ENABLE_PCIDB 0x00000200L /* Bit nÃ\83¸ 09 */
1046
1047static u32 lx_interrupt_test_ack(struct lx6464es *chip)
1048{
1049 u32 irqcs = lx_plx_reg_read(chip, ePLX_IRQCS);
1050
1051 /* Test if PCI Doorbell interrupt is active */
1052 if (irqcs & IRQCS_ACTIVE_PCIDB) {
1053 u32 temp;
1054 irqcs = PCX_IRQ_NONE;
1055
1056 while ((temp = lx_plx_reg_read(chip, ePLX_L2PCIDB))) {
1057 /* RAZ interrupt */
1058 irqcs |= temp;
1059 lx_plx_reg_write(chip, ePLX_L2PCIDB, temp);
1060 }
1061
1062 return irqcs;
1063 }
1064 return PCX_IRQ_NONE;
1065}
1066
1067static int lx_interrupt_ack(struct lx6464es *chip, u32 *r_irqsrc,
1068 int *r_async_pending, int *r_async_escmd)
1069{
1070 u32 irq_async;
1071 u32 irqsrc = lx_interrupt_test_ack(chip);
1072
1073 if (irqsrc == PCX_IRQ_NONE)
1074 return 0;
1075
1076 *r_irqsrc = irqsrc;
1077
1078 irq_async = irqsrc & MASK_SYS_ASYNC_EVENTS; /* + EtherSound response
1079 * (set by xilinx) + EOB */
1080
1081 if (irq_async & MASK_SYS_STATUS_ESA) {
1082 irq_async &= ~MASK_SYS_STATUS_ESA;
1083 *r_async_escmd = 1;
1084 }
1085
02bec490
TB		 1086 if (irq_async) {
1087 /* snd_printd("interrupt: async event pending\n"); */
1088 *r_async_pending = 1;
1089 }
1090
1091 return 1;
1092}
1093
1094static int lx_interrupt_handle_async_events(struct lx6464es *chip, u32 irqsrc,
1095 int *r_freq_changed,
1096 u64 *r_notified_in_pipe_mask,
1097 u64 *r_notified_out_pipe_mask)
1098{
1099 int err;
1100 u32 stat[9]; /* answer from CMD_04_GET_EVENT */
1101
1102 /* On peut optimiser pour ne pas lire les evenements vides
1103 * les mots de rÃ\83©ponse sont dans l'ordre suivant :
1104 * Stat[0] mot de status gÃ\83©nÃ\83©ral
1105 * Stat[1] fin de buffer OUT pF
1106 * Stat[2] fin de buffer OUT pf
1107 * Stat[3] fin de buffer IN pF
1108 * Stat[4] fin de buffer IN pf
1109 * Stat[5] underrun poid fort
1110 * Stat[6] underrun poid faible
1111 * Stat[7] overrun poid fort
1112 * Stat[8] overrun poid faible
1113 * */
1114
1115 u64 orun_mask;
1116 u64 urun_mask;
1117#if 0
1118 int has_underrun = (irqsrc & MASK_SYS_STATUS_URUN) ? 1 : 0;
1119 int has_overrun = (irqsrc & MASK_SYS_STATUS_ORUN) ? 1 : 0;
1120#endif
1121 int eb_pending_out = (irqsrc & MASK_SYS_STATUS_EOBO) ? 1 : 0;
1122 int eb_pending_in = (irqsrc & MASK_SYS_STATUS_EOBI) ? 1 : 0;
1123
1124 *r_freq_changed = (irqsrc & MASK_SYS_STATUS_FREQ) ? 1 : 0;
1125
1126 err = lx_dsp_read_async_events(chip, stat);
1127 if (err < 0)
1128 return err;
1129
1130 if (eb_pending_in) {
1131 *r_notified_in_pipe_mask = ((u64)stat[3] << 32)
1132 + stat[4];
1133 snd_printdd(LXP "interrupt: EOBI pending %llx\n",
1134 *r_notified_in_pipe_mask);
1135 }
1136 if (eb_pending_out) {
1137 *r_notified_out_pipe_mask = ((u64)stat[1] << 32)
1138 + stat[2];
1139 snd_printdd(LXP "interrupt: EOBO pending %llx\n",
1140 *r_notified_out_pipe_mask);
1141 }
1142
1143 orun_mask = ((u64)stat[7] << 32) + stat[8];
1144 urun_mask = ((u64)stat[5] << 32) + stat[6];
1145
1146 /* todo: handle xrun notification */
1147
1148 return err;
1149}
1150
1151static int lx_interrupt_request_new_buffer(struct lx6464es *chip,
1152 struct lx_stream *lx_stream)
1153{
1154 struct snd_pcm_substream *substream = lx_stream->stream;
f7467452 1155 const unsigned int is_capture = lx_stream->is_capture;
02bec490
TB		 1156 int err;
1157 unsigned long flags;
1158
1159 const u32 channels = substream->runtime->channels;
1160 const u32 bytes_per_frame = channels * 3;
1161 const u32 period_size = substream->runtime->period_size;
1162 const u32 period_bytes = period_size * bytes_per_frame;
1163 const u32 pos = lx_stream->frame_pos;
1164 const u32 next_pos = ((pos+1) == substream->runtime->periods) ?
1165 0 : pos + 1;
1166
1167 dma_addr_t buf = substream->dma_buffer.addr + pos * period_bytes;
1168 u32 buf_hi = 0;
1169 u32 buf_lo = 0;
1170 u32 buffer_index = 0;
1171
1172 u32 needed, freed;
1173 u32 size_array[MAX_STREAM_BUFFER];
1174
1175 snd_printdd("->lx_interrupt_request_new_buffer\n");
1176
1177 spin_lock_irqsave(&chip->lock, flags);
1178
1179 err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array);
1180 snd_printdd(LXP "interrupt: needed %d, freed %d\n", needed, freed);
1181
1182 unpack_pointer(buf, &buf_lo, &buf_hi);
1183 err = lx_buffer_give(chip, 0, is_capture, period_bytes, buf_lo, buf_hi,
1184 &buffer_index);
1185 snd_printdd(LXP "interrupt: gave buffer index %x on %p (%d bytes)\n",
1186 buffer_index, (void *)buf, period_bytes);
1187
1188 lx_stream->frame_pos = next_pos;
1189 spin_unlock_irqrestore(&chip->lock, flags);
1190
1191 return err;
1192}
1193
1194void lx_tasklet_playback(unsigned long data)
1195{
1196 struct lx6464es *chip = (struct lx6464es *)data;
1197 struct lx_stream *lx_stream = &chip->playback_stream;
1198 int err;
1199
1200 snd_printdd("->lx_tasklet_playback\n");
1201
1202 err = lx_interrupt_request_new_buffer(chip, lx_stream);
1203 if (err < 0)
1204 snd_printk(KERN_ERR LXP
1205 "cannot request new buffer for playback\n");
1206
1207 snd_pcm_period_elapsed(lx_stream->stream);
1208}
1209
1210void lx_tasklet_capture(unsigned long data)
1211{
1212 struct lx6464es *chip = (struct lx6464es *)data;
1213 struct lx_stream *lx_stream = &chip->capture_stream;
1214 int err;
1215
1216 snd_printdd("->lx_tasklet_capture\n");
1217 err = lx_interrupt_request_new_buffer(chip, lx_stream);
1218 if (err < 0)
1219 snd_printk(KERN_ERR LXP
1220 "cannot request new buffer for capture\n");
1221
1222 snd_pcm_period_elapsed(lx_stream->stream);
1223}
1224
1225
1226
1227static int lx_interrupt_handle_audio_transfer(struct lx6464es *chip,
1228 u64 notified_in_pipe_mask,
1229 u64 notified_out_pipe_mask)
1230{
1231 int err = 0;
1232
1233 if (notified_in_pipe_mask) {
1234 snd_printdd(LXP "requesting audio transfer for capture\n");
1235 tasklet_hi_schedule(&chip->tasklet_capture);
1236 }
1237
1238 if (notified_out_pipe_mask) {
1239 snd_printdd(LXP "requesting audio transfer for playback\n");
1240 tasklet_hi_schedule(&chip->tasklet_playback);
1241 }
1242
1243 return err;
1244}
1245
1246
1247irqreturn_t lx_interrupt(int irq, void *dev_id)
1248{
1249 struct lx6464es *chip = dev_id;
1250 int async_pending, async_escmd;
1251 u32 irqsrc;
1252
1253 spin_lock(&chip->lock);
1254
1255 snd_printdd("**************************************************\n");
1256
1257 if (!lx_interrupt_ack(chip, &irqsrc, &async_pending, &async_escmd)) {
1258 spin_unlock(&chip->lock);
1259 snd_printdd("IRQ_NONE\n");
1260 return IRQ_NONE; /* this device did not cause the interrupt */
1261 }
1262
1263 if (irqsrc & MASK_SYS_STATUS_CMD_DONE)
1264 goto exit;
1265
1266#if 0
1267 if (irqsrc & MASK_SYS_STATUS_EOBI)
1268 snd_printdd(LXP "interrupt: EOBI\n");
1269
1270 if (irqsrc & MASK_SYS_STATUS_EOBO)
1271 snd_printdd(LXP "interrupt: EOBO\n");
1272
1273 if (irqsrc & MASK_SYS_STATUS_URUN)
1274 snd_printdd(LXP "interrupt: URUN\n");
1275
1276 if (irqsrc & MASK_SYS_STATUS_ORUN)
1277 snd_printdd(LXP "interrupt: ORUN\n");
1278#endif
1279
1280 if (async_pending) {
1281 u64 notified_in_pipe_mask = 0;
1282 u64 notified_out_pipe_mask = 0;
1283 int freq_changed;
1284 int err;
1285
1286 /* handle async events */
1287 err = lx_interrupt_handle_async_events(chip, irqsrc,
1288 &freq_changed,
1289 &notified_in_pipe_mask,
1290 &notified_out_pipe_mask);
1291 if (err)
1292 snd_printk(KERN_ERR LXP
1293 "error handling async events\n");
1294
1295 err = lx_interrupt_handle_audio_transfer(chip,
1296 notified_in_pipe_mask,
1297 notified_out_pipe_mask
1298 );
1299 if (err)
1300 snd_printk(KERN_ERR LXP
1301 "error during audio transfer\n");
1302 }
1303
1304 if (async_escmd) {
1305#if 0
1306 /* backdoor for ethersound commands
1307 *
1308 * for now, we do not need this
1309 *
1310 * */
1311
1312 snd_printdd("lx6464es: interrupt requests escmd handling\n");
1313#endif
1314 }
1315
1316exit:
1317 spin_unlock(&chip->lock);
1318 return IRQ_HANDLED; /* this device caused the interrupt */
1319}
1320
1321
1322static void lx_irq_set(struct lx6464es *chip, int enable)
1323{
1324 u32 reg = lx_plx_reg_read(chip, ePLX_IRQCS);
1325
1326 /* enable/disable interrupts
1327 *
1328 * Set the Doorbell and PCI interrupt enable bits
1329 *
1330 * */
1331 if (enable)
1332 reg |= (IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
1333 else
1334 reg &= ~(IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
1335 lx_plx_reg_write(chip, ePLX_IRQCS, reg);
1336}
1337
1338void lx_irq_enable(struct lx6464es *chip)
1339{
1340 snd_printdd("->lx_irq_enable\n");
1341 lx_irq_set(chip, 1);
1342}
1343
1344void lx_irq_disable(struct lx6464es *chip)
1345{
1346 snd_printdd("->lx_irq_disable\n");
1347 lx_irq_set(chip, 0);
1348}
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