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-rw-r--r--sound/firewire/Kconfig25
-rw-r--r--sound/firewire/Makefile6
-rw-r--r--sound/firewire/amdtp.c549
-rw-r--r--sound/firewire/amdtp.h157
-rw-r--r--sound/firewire/cmp.c305
-rw-r--r--sound/firewire/cmp.h41
-rw-r--r--sound/firewire/fcp.c223
-rw-r--r--sound/firewire/fcp.h12
-rw-r--r--sound/firewire/iso-resources.c224
-rw-r--r--sound/firewire/iso-resources.h39
-rw-r--r--sound/firewire/lib.c85
-rw-r--r--sound/firewire/lib.h19
-rw-r--r--sound/firewire/packets-buffer.c74
-rw-r--r--sound/firewire/packets-buffer.h26
-rw-r--r--sound/firewire/speakers.c855
15 files changed, 2640 insertions, 0 deletions
diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
new file mode 100644
index 000000000000..e486f48660fb
--- /dev/null
+++ b/sound/firewire/Kconfig
@@ -0,0 +1,25 @@
1menuconfig SND_FIREWIRE
2 bool "FireWire sound devices"
3 depends on FIREWIRE
4 default y
5 help
6 Support for IEEE-1394/FireWire/iLink sound devices.
7
8if SND_FIREWIRE && FIREWIRE
9
10config SND_FIREWIRE_LIB
11 tristate
12 depends on SND_PCM
13
14config SND_FIREWIRE_SPEAKERS
15 tristate "FireWire speakers"
16 select SND_PCM
17 select SND_FIREWIRE_LIB
18 help
19 Say Y here to include support for the Griffin FireWave Surround
20 and the LaCie FireWire Speakers.
21
22 To compile this driver as a module, choose M here: the module
23 will be called snd-firewire-speakers.
24
25endif # SND_FIREWIRE
diff --git a/sound/firewire/Makefile b/sound/firewire/Makefile
new file mode 100644
index 000000000000..e5b1634d9ad4
--- /dev/null
+++ b/sound/firewire/Makefile
@@ -0,0 +1,6 @@
1snd-firewire-lib-objs := lib.o iso-resources.o packets-buffer.o \
2 fcp.o cmp.o amdtp.o
3snd-firewire-speakers-objs := speakers.o
4
5obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o
6obj-$(CONFIG_SND_FIREWIRE_SPEAKERS) += snd-firewire-speakers.o
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c
new file mode 100644
index 000000000000..09f70ee4d04a
--- /dev/null
+++ b/sound/firewire/amdtp.c
@@ -0,0 +1,549 @@
1/*
2 * Audio and Music Data Transmission Protocol (IEC 61883-6) streams
3 * with Common Isochronous Packet (IEC 61883-1) headers
4 *
5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
6 * Licensed under the terms of the GNU General Public License, version 2.
7 */
8
9#include <linux/device.h>
10#include <linux/err.h>
11#include <linux/firewire.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <sound/pcm.h>
15#include "amdtp.h"
16
17#define TICKS_PER_CYCLE 3072
18#define CYCLES_PER_SECOND 8000
19#define TICKS_PER_SECOND (TICKS_PER_CYCLE * CYCLES_PER_SECOND)
20
21#define TRANSFER_DELAY_TICKS 0x2e00 /* 479.17 µs */
22
23#define TAG_CIP 1
24
25#define CIP_EOH (1u << 31)
26#define CIP_FMT_AM (0x10 << 24)
27#define AMDTP_FDF_AM824 (0 << 19)
28#define AMDTP_FDF_SFC_SHIFT 16
29
30/* TODO: make these configurable */
31#define INTERRUPT_INTERVAL 16
32#define QUEUE_LENGTH 48
33
34/**
35 * amdtp_out_stream_init - initialize an AMDTP output stream structure
36 * @s: the AMDTP output stream to initialize
37 * @unit: the target of the stream
38 * @flags: the packet transmission method to use
39 */
40int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit,
41 enum cip_out_flags flags)
42{
43 if (flags != CIP_NONBLOCKING)
44 return -EINVAL;
45
46 s->unit = fw_unit_get(unit);
47 s->flags = flags;
48 s->context = ERR_PTR(-1);
49 mutex_init(&s->mutex);
50
51 return 0;
52}
53EXPORT_SYMBOL(amdtp_out_stream_init);
54
55/**
56 * amdtp_out_stream_destroy - free stream resources
57 * @s: the AMDTP output stream to destroy
58 */
59void amdtp_out_stream_destroy(struct amdtp_out_stream *s)
60{
61 WARN_ON(!IS_ERR(s->context));
62 mutex_destroy(&s->mutex);
63 fw_unit_put(s->unit);
64}
65EXPORT_SYMBOL(amdtp_out_stream_destroy);
66
67/**
68 * amdtp_out_stream_set_rate - set the sample rate
69 * @s: the AMDTP output stream to configure
70 * @rate: the sample rate
71 *
72 * The sample rate must be set before the stream is started, and must not be
73 * changed while the stream is running.
74 */
75void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate)
76{
77 static const struct {
78 unsigned int rate;
79 unsigned int syt_interval;
80 } rate_info[] = {
81 [CIP_SFC_32000] = { 32000, 8, },
82 [CIP_SFC_44100] = { 44100, 8, },
83 [CIP_SFC_48000] = { 48000, 8, },
84 [CIP_SFC_88200] = { 88200, 16, },
85 [CIP_SFC_96000] = { 96000, 16, },
86 [CIP_SFC_176400] = { 176400, 32, },
87 [CIP_SFC_192000] = { 192000, 32, },
88 };
89 unsigned int sfc;
90
91 if (WARN_ON(!IS_ERR(s->context)))
92 return;
93
94 for (sfc = 0; sfc < ARRAY_SIZE(rate_info); ++sfc)
95 if (rate_info[sfc].rate == rate) {
96 s->sfc = sfc;
97 s->syt_interval = rate_info[sfc].syt_interval;
98 return;
99 }
100 WARN_ON(1);
101}
102EXPORT_SYMBOL(amdtp_out_stream_set_rate);
103
104/**
105 * amdtp_out_stream_get_max_payload - get the stream's packet size
106 * @s: the AMDTP output stream
107 *
108 * This function must not be called before the stream has been configured
109 * with amdtp_out_stream_set_hw_params(), amdtp_out_stream_set_pcm(), and
110 * amdtp_out_stream_set_midi().
111 */
112unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s)
113{
114 static const unsigned int max_data_blocks[] = {
115 [CIP_SFC_32000] = 4,
116 [CIP_SFC_44100] = 6,
117 [CIP_SFC_48000] = 6,
118 [CIP_SFC_88200] = 12,
119 [CIP_SFC_96000] = 12,
120 [CIP_SFC_176400] = 23,
121 [CIP_SFC_192000] = 24,
122 };
123
124 s->data_block_quadlets = s->pcm_channels;
125 s->data_block_quadlets += DIV_ROUND_UP(s->midi_ports, 8);
126
127 return 8 + max_data_blocks[s->sfc] * 4 * s->data_block_quadlets;
128}
129EXPORT_SYMBOL(amdtp_out_stream_get_max_payload);
130
131static void amdtp_write_s16(struct amdtp_out_stream *s,
132 struct snd_pcm_substream *pcm,
133 __be32 *buffer, unsigned int frames);
134static void amdtp_write_s32(struct amdtp_out_stream *s,
135 struct snd_pcm_substream *pcm,
136 __be32 *buffer, unsigned int frames);
137
138/**
139 * amdtp_out_stream_set_pcm_format - set the PCM format
140 * @s: the AMDTP output stream to configure
141 * @format: the format of the ALSA PCM device
142 *
143 * The sample format must be set before the stream is started, and must not be
144 * changed while the stream is running.
145 */
146void amdtp_out_stream_set_pcm_format(struct amdtp_out_stream *s,
147 snd_pcm_format_t format)
148{
149 if (WARN_ON(!IS_ERR(s->context)))
150 return;
151
152 switch (format) {
153 default:
154 WARN_ON(1);
155 /* fall through */
156 case SNDRV_PCM_FORMAT_S16:
157 s->transfer_samples = amdtp_write_s16;
158 break;
159 case SNDRV_PCM_FORMAT_S32:
160 s->transfer_samples = amdtp_write_s32;
161 break;
162 }
163}
164EXPORT_SYMBOL(amdtp_out_stream_set_pcm_format);
165
166static unsigned int calculate_data_blocks(struct amdtp_out_stream *s)
167{
168 unsigned int phase, data_blocks;
169
170 if (!cip_sfc_is_base_44100(s->sfc)) {
171 /* Sample_rate / 8000 is an integer, and precomputed. */
172 data_blocks = s->data_block_state;
173 } else {
174 phase = s->data_block_state;
175
176 /*
177 * This calculates the number of data blocks per packet so that
178 * 1) the overall rate is correct and exactly synchronized to
179 * the bus clock, and
180 * 2) packets with a rounded-up number of blocks occur as early
181 * as possible in the sequence (to prevent underruns of the
182 * device's buffer).
183 */
184 if (s->sfc == CIP_SFC_44100)
185 /* 6 6 5 6 5 6 5 ... */
186 data_blocks = 5 + ((phase & 1) ^
187 (phase == 0 || phase >= 40));
188 else
189 /* 12 11 11 11 11 ... or 23 22 22 22 22 ... */
190 data_blocks = 11 * (s->sfc >> 1) + (phase == 0);
191 if (++phase >= (80 >> (s->sfc >> 1)))
192 phase = 0;
193 s->data_block_state = phase;
194 }
195
196 return data_blocks;
197}
198
199static unsigned int calculate_syt(struct amdtp_out_stream *s,
200 unsigned int cycle)
201{
202 unsigned int syt_offset, phase, index, syt;
203
204 if (s->last_syt_offset < TICKS_PER_CYCLE) {
205 if (!cip_sfc_is_base_44100(s->sfc))
206 syt_offset = s->last_syt_offset + s->syt_offset_state;
207 else {
208 /*
209 * The time, in ticks, of the n'th SYT_INTERVAL sample is:
210 * n * SYT_INTERVAL * 24576000 / sample_rate
211 * Modulo TICKS_PER_CYCLE, the difference between successive
212 * elements is about 1386.23. Rounding the results of this
213 * formula to the SYT precision results in a sequence of
214 * differences that begins with:
215 * 1386 1386 1387 1386 1386 1386 1387 1386 1386 1386 1387 ...
216 * This code generates _exactly_ the same sequence.
217 */
218 phase = s->syt_offset_state;
219 index = phase % 13;
220 syt_offset = s->last_syt_offset;
221 syt_offset += 1386 + ((index && !(index & 3)) ||
222 phase == 146);
223 if (++phase >= 147)
224 phase = 0;
225 s->syt_offset_state = phase;
226 }
227 } else
228 syt_offset = s->last_syt_offset - TICKS_PER_CYCLE;
229 s->last_syt_offset = syt_offset;
230
231 syt_offset += TRANSFER_DELAY_TICKS - TICKS_PER_CYCLE;
232 syt = (cycle + syt_offset / TICKS_PER_CYCLE) << 12;
233 syt += syt_offset % TICKS_PER_CYCLE;
234
235 return syt & 0xffff;
236}
237
238static void amdtp_write_s32(struct amdtp_out_stream *s,
239 struct snd_pcm_substream *pcm,
240 __be32 *buffer, unsigned int frames)
241{
242 struct snd_pcm_runtime *runtime = pcm->runtime;
243 unsigned int channels, remaining_frames, frame_step, i, c;
244 const u32 *src;
245
246 channels = s->pcm_channels;
247 src = (void *)runtime->dma_area +
248 s->pcm_buffer_pointer * (runtime->frame_bits / 8);
249 remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
250 frame_step = s->data_block_quadlets - channels;
251
252 for (i = 0; i < frames; ++i) {
253 for (c = 0; c < channels; ++c) {
254 *buffer = cpu_to_be32((*src >> 8) | 0x40000000);
255 src++;
256 buffer++;
257 }
258 buffer += frame_step;
259 if (--remaining_frames == 0)
260 src = (void *)runtime->dma_area;
261 }
262}
263
264static void amdtp_write_s16(struct amdtp_out_stream *s,
265 struct snd_pcm_substream *pcm,
266 __be32 *buffer, unsigned int frames)
267{
268 struct snd_pcm_runtime *runtime = pcm->runtime;
269 unsigned int channels, remaining_frames, frame_step, i, c;
270 const u16 *src;
271
272 channels = s->pcm_channels;
273 src = (void *)runtime->dma_area +
274 s->pcm_buffer_pointer * (runtime->frame_bits / 8);
275 remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
276 frame_step = s->data_block_quadlets - channels;
277
278 for (i = 0; i < frames; ++i) {
279 for (c = 0; c < channels; ++c) {
280 *buffer = cpu_to_be32((*src << 8) | 0x40000000);
281 src++;
282 buffer++;
283 }
284 buffer += frame_step;
285 if (--remaining_frames == 0)
286 src = (void *)runtime->dma_area;
287 }
288}
289
290static void amdtp_fill_pcm_silence(struct amdtp_out_stream *s,
291 __be32 *buffer, unsigned int frames)
292{
293 unsigned int i, c;
294
295 for (i = 0; i < frames; ++i) {
296 for (c = 0; c < s->pcm_channels; ++c)
297 buffer[c] = cpu_to_be32(0x40000000);
298 buffer += s->data_block_quadlets;
299 }
300}
301
302static void amdtp_fill_midi(struct amdtp_out_stream *s,
303 __be32 *buffer, unsigned int frames)
304{
305 unsigned int i;
306
307 for (i = 0; i < frames; ++i)
308 buffer[s->pcm_channels + i * s->data_block_quadlets] =
309 cpu_to_be32(0x80000000);
310}
311
312static void queue_out_packet(struct amdtp_out_stream *s, unsigned int cycle)
313{
314 __be32 *buffer;
315 unsigned int data_blocks, syt, ptr;
316 struct snd_pcm_substream *pcm;
317 struct fw_iso_packet packet;
318 int err;
319
320 data_blocks = calculate_data_blocks(s);
321 syt = calculate_syt(s, cycle);
322
323 buffer = s->buffer.packets[s->packet_counter].buffer;
324 buffer[0] = cpu_to_be32(ACCESS_ONCE(s->source_node_id_field) |
325 (s->data_block_quadlets << 16) |
326 s->data_block_counter);
327 buffer[1] = cpu_to_be32(CIP_EOH | CIP_FMT_AM | AMDTP_FDF_AM824 |
328 (s->sfc << AMDTP_FDF_SFC_SHIFT) | syt);
329 buffer += 2;
330
331 pcm = ACCESS_ONCE(s->pcm);
332 if (pcm)
333 s->transfer_samples(s, pcm, buffer, data_blocks);
334 else
335 amdtp_fill_pcm_silence(s, buffer, data_blocks);
336 if (s->midi_ports)
337 amdtp_fill_midi(s, buffer, data_blocks);
338
339 s->data_block_counter = (s->data_block_counter + data_blocks) & 0xff;
340
341 packet.payload_length = 8 + data_blocks * 4 * s->data_block_quadlets;
342 packet.interrupt = IS_ALIGNED(s->packet_counter + 1,
343 INTERRUPT_INTERVAL);
344 packet.skip = 0;
345 packet.tag = TAG_CIP;
346 packet.sy = 0;
347 packet.header_length = 0;
348
349 err = fw_iso_context_queue(s->context, &packet, &s->buffer.iso_buffer,
350 s->buffer.packets[s->packet_counter].offset);
351 if (err < 0)
352 dev_err(&s->unit->device, "queueing error: %d\n", err);
353
354 if (++s->packet_counter >= QUEUE_LENGTH)
355 s->packet_counter = 0;
356
357 if (pcm) {
358 ptr = s->pcm_buffer_pointer + data_blocks;
359 if (ptr >= pcm->runtime->buffer_size)
360 ptr -= pcm->runtime->buffer_size;
361 ACCESS_ONCE(s->pcm_buffer_pointer) = ptr;
362
363 s->pcm_period_pointer += data_blocks;
364 if (s->pcm_period_pointer >= pcm->runtime->period_size) {
365 s->pcm_period_pointer -= pcm->runtime->period_size;
366 snd_pcm_period_elapsed(pcm);
367 }
368 }
369}
370
371static void out_packet_callback(struct fw_iso_context *context, u32 cycle,
372 size_t header_length, void *header, void *data)
373{
374 struct amdtp_out_stream *s = data;
375 unsigned int i, packets = header_length / 4;
376
377 /*
378 * Compute the cycle of the last queued packet.
379 * (We need only the four lowest bits for the SYT, so we can ignore
380 * that bits 0-11 must wrap around at 3072.)
381 */
382 cycle += QUEUE_LENGTH - packets;
383
384 for (i = 0; i < packets; ++i)
385 queue_out_packet(s, ++cycle);
386}
387
388static int queue_initial_skip_packets(struct amdtp_out_stream *s)
389{
390 struct fw_iso_packet skip_packet = {
391 .skip = 1,
392 };
393 unsigned int i;
394 int err;
395
396 for (i = 0; i < QUEUE_LENGTH; ++i) {
397 skip_packet.interrupt = IS_ALIGNED(s->packet_counter + 1,
398 INTERRUPT_INTERVAL);
399 err = fw_iso_context_queue(s->context, &skip_packet, NULL, 0);
400 if (err < 0)
401 return err;
402 if (++s->packet_counter >= QUEUE_LENGTH)
403 s->packet_counter = 0;
404 }
405
406 return 0;
407}
408
409/**
410 * amdtp_out_stream_start - start sending packets
411 * @s: the AMDTP output stream to start
412 * @channel: the isochronous channel on the bus
413 * @speed: firewire speed code
414 *
415 * The stream cannot be started until it has been configured with
416 * amdtp_out_stream_set_hw_params(), amdtp_out_stream_set_pcm(), and
417 * amdtp_out_stream_set_midi(); and it must be started before any
418 * PCM or MIDI device can be started.
419 */
420int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed)
421{
422 static const struct {
423 unsigned int data_block;
424 unsigned int syt_offset;
425 } initial_state[] = {
426 [CIP_SFC_32000] = { 4, 3072 },
427 [CIP_SFC_48000] = { 6, 1024 },
428 [CIP_SFC_96000] = { 12, 1024 },
429 [CIP_SFC_192000] = { 24, 1024 },
430 [CIP_SFC_44100] = { 0, 67 },
431 [CIP_SFC_88200] = { 0, 67 },
432 [CIP_SFC_176400] = { 0, 67 },
433 };
434 int err;
435
436 mutex_lock(&s->mutex);
437
438 if (WARN_ON(!IS_ERR(s->context) ||
439 (!s->pcm_channels && !s->midi_ports))) {
440 err = -EBADFD;
441 goto err_unlock;
442 }
443
444 s->data_block_state = initial_state[s->sfc].data_block;
445 s->syt_offset_state = initial_state[s->sfc].syt_offset;
446 s->last_syt_offset = TICKS_PER_CYCLE;
447
448 err = iso_packets_buffer_init(&s->buffer, s->unit, QUEUE_LENGTH,
449 amdtp_out_stream_get_max_payload(s),
450 DMA_TO_DEVICE);
451 if (err < 0)
452 goto err_unlock;
453
454 s->context = fw_iso_context_create(fw_parent_device(s->unit)->card,
455 FW_ISO_CONTEXT_TRANSMIT,
456 channel, speed, 0,
457 out_packet_callback, s);
458 if (IS_ERR(s->context)) {
459 err = PTR_ERR(s->context);
460 if (err == -EBUSY)
461 dev_err(&s->unit->device,
462 "no free output stream on this controller\n");
463 goto err_buffer;
464 }
465
466 amdtp_out_stream_update(s);
467
468 s->packet_counter = 0;
469 s->data_block_counter = 0;
470 err = queue_initial_skip_packets(s);
471 if (err < 0)
472 goto err_context;
473
474 err = fw_iso_context_start(s->context, -1, 0, 0);
475 if (err < 0)
476 goto err_context;
477
478 mutex_unlock(&s->mutex);
479
480 return 0;
481
482err_context:
483 fw_iso_context_destroy(s->context);
484 s->context = ERR_PTR(-1);
485err_buffer:
486 iso_packets_buffer_destroy(&s->buffer, s->unit);
487err_unlock:
488 mutex_unlock(&s->mutex);
489
490 return err;
491}
492EXPORT_SYMBOL(amdtp_out_stream_start);
493
494/**
495 * amdtp_out_stream_update - update the stream after a bus reset
496 * @s: the AMDTP output stream
497 */
498void amdtp_out_stream_update(struct amdtp_out_stream *s)
499{
500 ACCESS_ONCE(s->source_node_id_field) =
501 (fw_parent_device(s->unit)->card->node_id & 0x3f) << 24;
502}
503EXPORT_SYMBOL(amdtp_out_stream_update);
504
505/**
506 * amdtp_out_stream_stop - stop sending packets
507 * @s: the AMDTP output stream to stop
508 *
509 * All PCM and MIDI devices of the stream must be stopped before the stream
510 * itself can be stopped.
511 */
512void amdtp_out_stream_stop(struct amdtp_out_stream *s)
513{
514 mutex_lock(&s->mutex);
515
516 if (IS_ERR(s->context)) {
517 mutex_unlock(&s->mutex);
518 return;
519 }
520
521 fw_iso_context_stop(s->context);
522 fw_iso_context_destroy(s->context);
523 s->context = ERR_PTR(-1);
524 iso_packets_buffer_destroy(&s->buffer, s->unit);
525
526 mutex_unlock(&s->mutex);
527}
528EXPORT_SYMBOL(amdtp_out_stream_stop);
529
530/**
531 * amdtp_out_stream_pcm_abort - abort the running PCM device
532 * @s: the AMDTP stream about to be stopped
533 *
534 * If the isochronous stream needs to be stopped asynchronously, call this
535 * function first to stop the PCM device.
536 */
537void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s)
538{
539 struct snd_pcm_substream *pcm;
540
541 pcm = ACCESS_ONCE(s->pcm);
542 if (pcm) {
543 snd_pcm_stream_lock_irq(pcm);
544 if (snd_pcm_running(pcm))
545 snd_pcm_stop(pcm, SNDRV_PCM_STATE_XRUN);
546 snd_pcm_stream_unlock_irq(pcm);
547 }
548}
549EXPORT_SYMBOL(amdtp_out_stream_pcm_abort);
diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h
new file mode 100644
index 000000000000..02dc1a664b55
--- /dev/null
+++ b/sound/firewire/amdtp.h
@@ -0,0 +1,157 @@
1#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
2#define SOUND_FIREWIRE_AMDTP_H_INCLUDED
3
4#include <linux/mutex.h>
5#include <linux/spinlock.h>
6#include "packets-buffer.h"
7
8/**
9 * enum cip_out_flags - describes details of the streaming protocol
10 * @CIP_NONBLOCKING: In non-blocking mode, each packet contains
11 * sample_rate/8000 samples, with rounding up or down to adjust
12 * for clock skew and left-over fractional samples. This should
13 * be used if supported by the device.
14 */
15enum cip_out_flags {
16 CIP_NONBLOCKING = 0,
17};
18
19/**
20 * enum cip_sfc - a stream's sample rate
21 */
22enum cip_sfc {
23 CIP_SFC_32000 = 0,
24 CIP_SFC_44100 = 1,
25 CIP_SFC_48000 = 2,
26 CIP_SFC_88200 = 3,
27 CIP_SFC_96000 = 4,
28 CIP_SFC_176400 = 5,
29 CIP_SFC_192000 = 6,
30};
31
32#define AMDTP_OUT_PCM_FORMAT_BITS (SNDRV_PCM_FMTBIT_S16 | \
33 SNDRV_PCM_FMTBIT_S32)
34
35struct fw_unit;
36struct fw_iso_context;
37struct snd_pcm_substream;
38
39struct amdtp_out_stream {
40 struct fw_unit *unit;
41 enum cip_out_flags flags;
42 struct fw_iso_context *context;
43 struct mutex mutex;
44
45 enum cip_sfc sfc;
46 unsigned int data_block_quadlets;
47 unsigned int pcm_channels;
48 unsigned int midi_ports;
49 void (*transfer_samples)(struct amdtp_out_stream *s,
50 struct snd_pcm_substream *pcm,
51 __be32 *buffer, unsigned int frames);
52
53 unsigned int syt_interval;
54 unsigned int source_node_id_field;
55 struct iso_packets_buffer buffer;
56
57 struct snd_pcm_substream *pcm;
58
59 unsigned int packet_counter;
60 unsigned int data_block_counter;
61
62 unsigned int data_block_state;
63
64 unsigned int last_syt_offset;
65 unsigned int syt_offset_state;
66
67 unsigned int pcm_buffer_pointer;
68 unsigned int pcm_period_pointer;
69};
70
71int amdtp_out_stream_init(struct amdtp_out_stream *s, struct fw_unit *unit,
72 enum cip_out_flags flags);
73void amdtp_out_stream_destroy(struct amdtp_out_stream *s);
74
75void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate);
76unsigned int amdtp_out_stream_get_max_payload(struct amdtp_out_stream *s);
77
78int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed);
79void amdtp_out_stream_update(struct amdtp_out_stream *s);
80void amdtp_out_stream_stop(struct amdtp_out_stream *s);
81
82void amdtp_out_stream_set_pcm_format(struct amdtp_out_stream *s,
83 snd_pcm_format_t format);
84void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s);
85
86/**
87 * amdtp_out_stream_set_pcm - configure format of PCM samples
88 * @s: the AMDTP output stream to be configured
89 * @pcm_channels: the number of PCM samples in each data block, to be encoded
90 * as AM824 multi-bit linear audio
91 *
92 * This function must not be called while the stream is running.
93 */
94static inline void amdtp_out_stream_set_pcm(struct amdtp_out_stream *s,
95 unsigned int pcm_channels)
96{
97 s->pcm_channels = pcm_channels;
98}
99
100/**
101 * amdtp_out_stream_set_midi - configure format of MIDI data
102 * @s: the AMDTP output stream to be configured
103 * @midi_ports: the number of MIDI ports (i.e., MPX-MIDI Data Channels)
104 *
105 * This function must not be called while the stream is running.
106 */
107static inline void amdtp_out_stream_set_midi(struct amdtp_out_stream *s,
108 unsigned int midi_ports)
109{
110 s->midi_ports = midi_ports;
111}
112
113/**
114 * amdtp_out_stream_pcm_prepare - prepare PCM device for running
115 * @s: the AMDTP output stream
116 *
117 * This function should be called from the PCM device's .prepare callback.
118 */
119static inline void amdtp_out_stream_pcm_prepare(struct amdtp_out_stream *s)
120{
121 s->pcm_buffer_pointer = 0;
122 s->pcm_period_pointer = 0;
123}
124
125/**
126 * amdtp_out_stream_pcm_trigger - start/stop playback from a PCM device
127 * @s: the AMDTP output stream
128 * @pcm: the PCM device to be started, or %NULL to stop the current device
129 *
130 * Call this function on a running isochronous stream to enable the actual
131 * transmission of PCM data. This function should be called from the PCM
132 * device's .trigger callback.
133 */
134static inline void amdtp_out_stream_pcm_trigger(struct amdtp_out_stream *s,
135 struct snd_pcm_substream *pcm)
136{
137 ACCESS_ONCE(s->pcm) = pcm;
138}
139
140/**
141 * amdtp_out_stream_pcm_pointer - get the PCM buffer position
142 * @s: the AMDTP output stream that transports the PCM data
143 *
144 * Returns the current buffer position, in frames.
145 */
146static inline unsigned long
147amdtp_out_stream_pcm_pointer(struct amdtp_out_stream *s)
148{
149 return ACCESS_ONCE(s->pcm_buffer_pointer);
150}
151
152static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc)
153{
154 return sfc & 1;
155}
156
157#endif
diff --git a/sound/firewire/cmp.c b/sound/firewire/cmp.c
new file mode 100644
index 000000000000..c992dab4bb95
--- /dev/null
+++ b/sound/firewire/cmp.c
@@ -0,0 +1,305 @@
1/*
2 * Connection Management Procedures (IEC 61883-1) helper functions
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
8#include <linux/device.h>
9#include <linux/firewire.h>
10#include <linux/firewire-constants.h>
11#include <linux/module.h>
12#include <linux/sched.h>
13#include "lib.h"
14#include "iso-resources.h"
15#include "cmp.h"
16
17#define IMPR_SPEED_MASK 0xc0000000
18#define IMPR_SPEED_SHIFT 30
19#define IMPR_XSPEED_MASK 0x00000060
20#define IMPR_XSPEED_SHIFT 5
21#define IMPR_PLUGS_MASK 0x0000001f
22
23#define IPCR_ONLINE 0x80000000
24#define IPCR_BCAST_CONN 0x40000000
25#define IPCR_P2P_CONN_MASK 0x3f000000
26#define IPCR_P2P_CONN_SHIFT 24
27#define IPCR_CHANNEL_MASK 0x003f0000
28#define IPCR_CHANNEL_SHIFT 16
29
30enum bus_reset_handling {
31 ABORT_ON_BUS_RESET,
32 SUCCEED_ON_BUS_RESET,
33};
34
35static __attribute__((format(printf, 2, 3)))
36void cmp_error(struct cmp_connection *c, const char *fmt, ...)
37{
38 va_list va;
39
40 va_start(va, fmt);
41 dev_err(&c->resources.unit->device, "%cPCR%u: %pV",
42 'i', c->pcr_index, &(struct va_format){ fmt, &va });
43 va_end(va);
44}
45
46static int pcr_modify(struct cmp_connection *c,
47 __be32 (*modify)(struct cmp_connection *c, __be32 old),
48 int (*check)(struct cmp_connection *c, __be32 pcr),
49 enum bus_reset_handling bus_reset_handling)
50{
51 struct fw_device *device = fw_parent_device(c->resources.unit);
52 __be32 *buffer = c->resources.buffer;
53 int generation = c->resources.generation;
54 int rcode, errors = 0;
55 __be32 old_arg;
56 int err;
57
58 buffer[0] = c->last_pcr_value;
59 for (;;) {
60 old_arg = buffer[0];
61 buffer[1] = modify(c, buffer[0]);
62
63 rcode = fw_run_transaction(
64 device->card, TCODE_LOCK_COMPARE_SWAP,
65 device->node_id, generation, device->max_speed,
66 CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index),
67 buffer, 8);
68
69 if (rcode == RCODE_COMPLETE) {
70 if (buffer[0] == old_arg) /* success? */
71 break;
72
73 if (check) {
74 err = check(c, buffer[0]);
75 if (err < 0)
76 return err;
77 }
78 } else if (rcode == RCODE_GENERATION)
79 goto bus_reset;
80 else if (rcode_is_permanent_error(rcode) || ++errors >= 3)
81 goto io_error;
82 }
83 c->last_pcr_value = buffer[1];
84
85 return 0;
86
87io_error:
88 cmp_error(c, "transaction failed: %s\n", rcode_string(rcode));
89 return -EIO;
90
91bus_reset:
92 return bus_reset_handling == ABORT_ON_BUS_RESET ? -EAGAIN : 0;
93}
94
95
96/**
97 * cmp_connection_init - initializes a connection manager
98 * @c: the connection manager to initialize
99 * @unit: a unit of the target device
100 * @ipcr_index: the index of the iPCR on the target device
101 */
102int cmp_connection_init(struct cmp_connection *c,
103 struct fw_unit *unit,
104 unsigned int ipcr_index)
105{
106 __be32 impr_be;
107 u32 impr;
108 int err;
109
110 err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
111 CSR_REGISTER_BASE + CSR_IMPR,
112 &impr_be, 4);
113 if (err < 0)
114 return err;
115 impr = be32_to_cpu(impr_be);
116
117 if (ipcr_index >= (impr & IMPR_PLUGS_MASK))
118 return -EINVAL;
119
120 c->connected = false;
121 mutex_init(&c->mutex);
122 fw_iso_resources_init(&c->resources, unit);
123 c->last_pcr_value = cpu_to_be32(0x80000000);
124 c->pcr_index = ipcr_index;
125 c->max_speed = (impr & IMPR_SPEED_MASK) >> IMPR_SPEED_SHIFT;
126 if (c->max_speed == SCODE_BETA)
127 c->max_speed += (impr & IMPR_XSPEED_MASK) >> IMPR_XSPEED_SHIFT;
128
129 return 0;
130}
131EXPORT_SYMBOL(cmp_connection_init);
132
133/**
134 * cmp_connection_destroy - free connection manager resources
135 * @c: the connection manager
136 */
137void cmp_connection_destroy(struct cmp_connection *c)
138{
139 WARN_ON(c->connected);
140 mutex_destroy(&c->mutex);
141 fw_iso_resources_destroy(&c->resources);
142}
143EXPORT_SYMBOL(cmp_connection_destroy);
144
145
146static __be32 ipcr_set_modify(struct cmp_connection *c, __be32 ipcr)
147{
148 ipcr &= ~cpu_to_be32(IPCR_BCAST_CONN |
149 IPCR_P2P_CONN_MASK |
150 IPCR_CHANNEL_MASK);
151 ipcr |= cpu_to_be32(1 << IPCR_P2P_CONN_SHIFT);
152 ipcr |= cpu_to_be32(c->resources.channel << IPCR_CHANNEL_SHIFT);
153
154 return ipcr;
155}
156
157static int ipcr_set_check(struct cmp_connection *c, __be32 ipcr)
158{
159 if (ipcr & cpu_to_be32(IPCR_BCAST_CONN |
160 IPCR_P2P_CONN_MASK)) {
161 cmp_error(c, "plug is already in use\n");
162 return -EBUSY;
163 }
164 if (!(ipcr & cpu_to_be32(IPCR_ONLINE))) {
165 cmp_error(c, "plug is not on-line\n");
166 return -ECONNREFUSED;
167 }
168
169 return 0;
170}
171
172/**
173 * cmp_connection_establish - establish a connection to the target
174 * @c: the connection manager
175 * @max_payload_bytes: the amount of data (including CIP headers) per packet
176 *
177 * This function establishes a point-to-point connection from the local
178 * computer to the target by allocating isochronous resources (channel and
179 * bandwidth) and setting the target's input plug control register. When this
180 * function succeeds, the caller is responsible for starting transmitting
181 * packets.
182 */
183int cmp_connection_establish(struct cmp_connection *c,
184 unsigned int max_payload_bytes)
185{
186 int err;
187
188 if (WARN_ON(c->connected))
189 return -EISCONN;
190
191 c->speed = min(c->max_speed,
192 fw_parent_device(c->resources.unit)->max_speed);
193
194 mutex_lock(&c->mutex);
195
196retry_after_bus_reset:
197 err = fw_iso_resources_allocate(&c->resources,
198 max_payload_bytes, c->speed);
199 if (err < 0)
200 goto err_mutex;
201
202 err = pcr_modify(c, ipcr_set_modify, ipcr_set_check,
203 ABORT_ON_BUS_RESET);
204 if (err == -EAGAIN) {
205 fw_iso_resources_free(&c->resources);
206 goto retry_after_bus_reset;
207 }
208 if (err < 0)
209 goto err_resources;
210
211 c->connected = true;
212
213 mutex_unlock(&c->mutex);
214
215 return 0;
216
217err_resources:
218 fw_iso_resources_free(&c->resources);
219err_mutex:
220 mutex_unlock(&c->mutex);
221
222 return err;
223}
224EXPORT_SYMBOL(cmp_connection_establish);
225
226/**
227 * cmp_connection_update - update the connection after a bus reset
228 * @c: the connection manager
229 *
230 * This function must be called from the driver's .update handler to reestablish
231 * any connection that might have been active.
232 *
233 * Returns zero on success, or a negative error code. On an error, the
234 * connection is broken and the caller must stop transmitting iso packets.
235 */
236int cmp_connection_update(struct cmp_connection *c)
237{
238 int err;
239
240 mutex_lock(&c->mutex);
241
242 if (!c->connected) {
243 mutex_unlock(&c->mutex);
244 return 0;
245 }
246
247 err = fw_iso_resources_update(&c->resources);
248 if (err < 0)
249 goto err_unconnect;
250
251 err = pcr_modify(c, ipcr_set_modify, ipcr_set_check,
252 SUCCEED_ON_BUS_RESET);
253 if (err < 0)
254 goto err_resources;
255
256 mutex_unlock(&c->mutex);
257
258 return 0;
259
260err_resources:
261 fw_iso_resources_free(&c->resources);
262err_unconnect:
263 c->connected = false;
264 mutex_unlock(&c->mutex);
265
266 return err;
267}
268EXPORT_SYMBOL(cmp_connection_update);
269
270
271static __be32 ipcr_break_modify(struct cmp_connection *c, __be32 ipcr)
272{
273 return ipcr & ~cpu_to_be32(IPCR_BCAST_CONN | IPCR_P2P_CONN_MASK);
274}
275
276/**
277 * cmp_connection_break - break the connection to the target
278 * @c: the connection manager
279 *
280 * This function deactives the connection in the target's input plug control
281 * register, and frees the isochronous resources of the connection. Before
282 * calling this function, the caller should cease transmitting packets.
283 */
284void cmp_connection_break(struct cmp_connection *c)
285{
286 int err;
287
288 mutex_lock(&c->mutex);
289
290 if (!c->connected) {
291 mutex_unlock(&c->mutex);
292 return;
293 }
294
295 err = pcr_modify(c, ipcr_break_modify, NULL, SUCCEED_ON_BUS_RESET);
296 if (err < 0)
297 cmp_error(c, "plug is still connected\n");
298
299 fw_iso_resources_free(&c->resources);
300
301 c->connected = false;
302
303 mutex_unlock(&c->mutex);
304}
305EXPORT_SYMBOL(cmp_connection_break);
diff --git a/sound/firewire/cmp.h b/sound/firewire/cmp.h
new file mode 100644
index 000000000000..f47de08feb12
--- /dev/null
+++ b/sound/firewire/cmp.h
@@ -0,0 +1,41 @@
1#ifndef SOUND_FIREWIRE_CMP_H_INCLUDED
2#define SOUND_FIREWIRE_CMP_H_INCLUDED
3
4#include <linux/mutex.h>
5#include <linux/types.h>
6#include "iso-resources.h"
7
8struct fw_unit;
9
10/**
11 * struct cmp_connection - manages an isochronous connection to a device
12 * @speed: the connection's actual speed
13 *
14 * This structure manages (using CMP) an isochronous stream from the local
15 * computer to a device's input plug (iPCR).
16 *
17 * There is no corresponding oPCR created on the local computer, so it is not
18 * possible to overlay connections on top of this one.
19 */
20struct cmp_connection {
21 int speed;
22 /* private: */
23 bool connected;
24 struct mutex mutex;
25 struct fw_iso_resources resources;
26 __be32 last_pcr_value;
27 unsigned int pcr_index;
28 unsigned int max_speed;
29};
30
31int cmp_connection_init(struct cmp_connection *connection,
32 struct fw_unit *unit,
33 unsigned int ipcr_index);
34void cmp_connection_destroy(struct cmp_connection *connection);
35
36int cmp_connection_establish(struct cmp_connection *connection,
37 unsigned int max_payload);
38int cmp_connection_update(struct cmp_connection *connection);
39void cmp_connection_break(struct cmp_connection *connection);
40
41#endif
diff --git a/sound/firewire/fcp.c b/sound/firewire/fcp.c
new file mode 100644
index 000000000000..c20bd9c8f5ab
--- /dev/null
+++ b/sound/firewire/fcp.c
@@ -0,0 +1,223 @@
1/*
2 * Function Control Protocol (IEC 61883-1) helper functions
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
8#include <linux/device.h>
9#include <linux/firewire.h>
10#include <linux/firewire-constants.h>
11#include <linux/list.h>
12#include <linux/module.h>
13#include <linux/sched.h>
14#include <linux/spinlock.h>
15#include <linux/wait.h>
16#include "fcp.h"
17#include "lib.h"
18
19#define CTS_AVC 0x00
20
21#define ERROR_RETRIES 3
22#define ERROR_DELAY_MS 5
23#define FCP_TIMEOUT_MS 125
24
25static DEFINE_SPINLOCK(transactions_lock);
26static LIST_HEAD(transactions);
27
28enum fcp_state {
29 STATE_PENDING,
30 STATE_BUS_RESET,
31 STATE_COMPLETE,
32};
33
34struct fcp_transaction {
35 struct list_head list;
36 struct fw_unit *unit;
37 void *response_buffer;
38 unsigned int response_size;
39 unsigned int response_match_bytes;
40 enum fcp_state state;
41 wait_queue_head_t wait;
42};
43
44/**
45 * fcp_avc_transaction - send an AV/C command and wait for its response
46 * @unit: a unit on the target device
47 * @command: a buffer containing the command frame; must be DMA-able
48 * @command_size: the size of @command
49 * @response: a buffer for the response frame
50 * @response_size: the maximum size of @response
51 * @response_match_bytes: a bitmap specifying the bytes used to detect the
52 * correct response frame
53 *
54 * This function sends a FCP command frame to the target and waits for the
55 * corresponding response frame to be returned.
56 *
57 * Because it is possible for multiple FCP transactions to be active at the
58 * same time, the correct response frame is detected by the value of certain
59 * bytes. These bytes must be set in @response before calling this function,
60 * and the corresponding bits must be set in @response_match_bytes.
61 *
62 * @command and @response can point to the same buffer.
63 *
64 * Asynchronous operation (INTERIM, NOTIFY) is not supported at the moment.
65 *
66 * Returns the actual size of the response frame, or a negative error code.
67 */
68int fcp_avc_transaction(struct fw_unit *unit,
69 const void *command, unsigned int command_size,
70 void *response, unsigned int response_size,
71 unsigned int response_match_bytes)
72{
73 struct fcp_transaction t;
74 int tcode, ret, tries = 0;
75
76 t.unit = unit;
77 t.response_buffer = response;
78 t.response_size = response_size;
79 t.response_match_bytes = response_match_bytes;
80 t.state = STATE_PENDING;
81 init_waitqueue_head(&t.wait);
82
83 spin_lock_irq(&transactions_lock);
84 list_add_tail(&t.list, &transactions);
85 spin_unlock_irq(&transactions_lock);
86
87 for (;;) {
88 tcode = command_size == 4 ? TCODE_WRITE_QUADLET_REQUEST
89 : TCODE_WRITE_BLOCK_REQUEST;
90 ret = snd_fw_transaction(t.unit, tcode,
91 CSR_REGISTER_BASE + CSR_FCP_COMMAND,
92 (void *)command, command_size);
93 if (ret < 0)
94 break;
95
96 wait_event_timeout(t.wait, t.state != STATE_PENDING,
97 msecs_to_jiffies(FCP_TIMEOUT_MS));
98
99 if (t.state == STATE_COMPLETE) {
100 ret = t.response_size;
101 break;
102 } else if (t.state == STATE_BUS_RESET) {
103 msleep(ERROR_DELAY_MS);
104 } else if (++tries >= ERROR_RETRIES) {
105 dev_err(&t.unit->device, "FCP command timed out\n");
106 ret = -EIO;
107 break;
108 }
109 }
110
111 spin_lock_irq(&transactions_lock);
112 list_del(&t.list);
113 spin_unlock_irq(&transactions_lock);
114
115 return ret;
116}
117EXPORT_SYMBOL(fcp_avc_transaction);
118
119/**
120 * fcp_bus_reset - inform the target handler about a bus reset
121 * @unit: the unit that might be used by fcp_avc_transaction()
122 *
123 * This function must be called from the driver's .update handler to inform
124 * the FCP transaction handler that a bus reset has happened. Any pending FCP
125 * transactions are retried.
126 */
127void fcp_bus_reset(struct fw_unit *unit)
128{
129 struct fcp_transaction *t;
130
131 spin_lock_irq(&transactions_lock);
132 list_for_each_entry(t, &transactions, list) {
133 if (t->unit == unit &&
134 t->state == STATE_PENDING) {
135 t->state = STATE_BUS_RESET;
136 wake_up(&t->wait);
137 }
138 }
139 spin_unlock_irq(&transactions_lock);
140}
141EXPORT_SYMBOL(fcp_bus_reset);
142
143/* checks whether the response matches the masked bytes in response_buffer */
144static bool is_matching_response(struct fcp_transaction *transaction,
145 const void *response, size_t length)
146{
147 const u8 *p1, *p2;
148 unsigned int mask, i;
149
150 p1 = response;
151 p2 = transaction->response_buffer;
152 mask = transaction->response_match_bytes;
153
154 for (i = 0; ; ++i) {
155 if ((mask & 1) && p1[i] != p2[i])
156 return false;
157 mask >>= 1;
158 if (!mask)
159 return true;
160 if (--length == 0)
161 return false;
162 }
163}
164
165static void fcp_response(struct fw_card *card, struct fw_request *request,
166 int tcode, int destination, int source,
167 int generation, unsigned long long offset,
168 void *data, size_t length, void *callback_data)
169{
170 struct fcp_transaction *t;
171 unsigned long flags;
172
173 if (length < 1 || (*(const u8 *)data & 0xf0) != CTS_AVC)
174 return;
175
176 spin_lock_irqsave(&transactions_lock, flags);
177 list_for_each_entry(t, &transactions, list) {
178 struct fw_device *device = fw_parent_device(t->unit);
179 if (device->card != card ||
180 device->generation != generation)
181 continue;
182 smp_rmb(); /* node_id vs. generation */
183 if (device->node_id != source)
184 continue;
185
186 if (t->state == STATE_PENDING &&
187 is_matching_response(t, data, length)) {
188 t->state = STATE_COMPLETE;
189 t->response_size = min((unsigned int)length,
190 t->response_size);
191 memcpy(t->response_buffer, data, t->response_size);
192 wake_up(&t->wait);
193 }
194 }
195 spin_unlock_irqrestore(&transactions_lock, flags);
196}
197
198static struct fw_address_handler response_register_handler = {
199 .length = 0x200,
200 .address_callback = fcp_response,
201};
202
203static int __init fcp_module_init(void)
204{
205 static const struct fw_address_region response_register_region = {
206 .start = CSR_REGISTER_BASE + CSR_FCP_RESPONSE,
207 .end = CSR_REGISTER_BASE + CSR_FCP_END,
208 };
209
210 fw_core_add_address_handler(&response_register_handler,
211 &response_register_region);
212
213 return 0;
214}
215
216static void __exit fcp_module_exit(void)
217{
218 WARN_ON(!list_empty(&transactions));
219 fw_core_remove_address_handler(&response_register_handler);
220}
221
222module_init(fcp_module_init);
223module_exit(fcp_module_exit);
diff --git a/sound/firewire/fcp.h b/sound/firewire/fcp.h
new file mode 100644
index 000000000000..86595688bd91
--- /dev/null
+++ b/sound/firewire/fcp.h
@@ -0,0 +1,12 @@
1#ifndef SOUND_FIREWIRE_FCP_H_INCLUDED
2#define SOUND_FIREWIRE_FCP_H_INCLUDED
3
4struct fw_unit;
5
6int fcp_avc_transaction(struct fw_unit *unit,
7 const void *command, unsigned int command_size,
8 void *response, unsigned int response_size,
9 unsigned int response_match_bytes);
10void fcp_bus_reset(struct fw_unit *unit);
11
12#endif
diff --git a/sound/firewire/iso-resources.c b/sound/firewire/iso-resources.c
new file mode 100644
index 000000000000..6f2b5f8651fd
--- /dev/null
+++ b/sound/firewire/iso-resources.c
@@ -0,0 +1,224 @@
1/*
2 * isochronous resources helper functions
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
8#include <linux/device.h>
9#include <linux/firewire.h>
10#include <linux/firewire-constants.h>
11#include <linux/jiffies.h>
12#include <linux/mutex.h>
13#include <linux/sched.h>
14#include <linux/spinlock.h>
15#include "iso-resources.h"
16
17/**
18 * fw_iso_resources_init - initializes a &struct fw_iso_resources
19 * @r: the resource manager to initialize
20 * @unit: the device unit for which the resources will be needed
21 *
22 * If the device does not support all channel numbers, change @r->channels_mask
23 * after calling this function.
24 */
25void fw_iso_resources_init(struct fw_iso_resources *r, struct fw_unit *unit)
26{
27 r->channels_mask = ~0uLL;
28 r->unit = fw_unit_get(unit);
29 mutex_init(&r->mutex);
30 r->allocated = false;
31}
32
33/**
34 * fw_iso_resources_destroy - destroy a resource manager
35 * @r: the resource manager that is no longer needed
36 */
37void fw_iso_resources_destroy(struct fw_iso_resources *r)
38{
39 WARN_ON(r->allocated);
40 mutex_destroy(&r->mutex);
41 fw_unit_put(r->unit);
42}
43
44static unsigned int packet_bandwidth(unsigned int max_payload_bytes, int speed)
45{
46 unsigned int bytes, s400_bytes;
47
48 /* iso packets have three header quadlets and quadlet-aligned payload */
49 bytes = 3 * 4 + ALIGN(max_payload_bytes, 4);
50
51 /* convert to bandwidth units (quadlets at S1600 = bytes at S400) */
52 if (speed <= SCODE_400)
53 s400_bytes = bytes * (1 << (SCODE_400 - speed));
54 else
55 s400_bytes = DIV_ROUND_UP(bytes, 1 << (speed - SCODE_400));
56
57 return s400_bytes;
58}
59
60static int current_bandwidth_overhead(struct fw_card *card)
61{
62 /*
63 * Under the usual pessimistic assumption (cable length 4.5 m), the
64 * isochronous overhead for N cables is 1.797 µs + N * 0.494 µs, or
65 * 88.3 + N * 24.3 in bandwidth units.
66 *
67 * The calculation below tries to deduce N from the current gap count.
68 * If the gap count has been optimized by measuring the actual packet
69 * transmission time, this derived overhead should be near the actual
70 * overhead as well.
71 */
72 return card->gap_count < 63 ? card->gap_count * 97 / 10 + 89 : 512;
73}
74
75static int wait_isoch_resource_delay_after_bus_reset(struct fw_card *card)
76{
77 for (;;) {
78 s64 delay = (card->reset_jiffies + HZ) - get_jiffies_64();
79 if (delay <= 0)
80 return 0;
81 if (schedule_timeout_interruptible(delay) > 0)
82 return -ERESTARTSYS;
83 }
84}
85
86/**
87 * fw_iso_resources_allocate - allocate isochronous channel and bandwidth
88 * @r: the resource manager
89 * @max_payload_bytes: the amount of data (including CIP headers) per packet
90 * @speed: the speed (e.g., SCODE_400) at which the packets will be sent
91 *
92 * This function allocates one isochronous channel and enough bandwidth for the
93 * specified packet size.
94 *
95 * Returns the channel number that the caller must use for streaming, or
96 * a negative error code. Due to potentionally long delays, this function is
97 * interruptible and can return -ERESTARTSYS. On success, the caller is
98 * responsible for calling fw_iso_resources_update() on bus resets, and
99 * fw_iso_resources_free() when the resources are not longer needed.
100 */
101int fw_iso_resources_allocate(struct fw_iso_resources *r,
102 unsigned int max_payload_bytes, int speed)
103{
104 struct fw_card *card = fw_parent_device(r->unit)->card;
105 int bandwidth, channel, err;
106
107 if (WARN_ON(r->allocated))
108 return -EBADFD;
109
110 r->bandwidth = packet_bandwidth(max_payload_bytes, speed);
111
112retry_after_bus_reset:
113 spin_lock_irq(&card->lock);
114 r->generation = card->generation;
115 r->bandwidth_overhead = current_bandwidth_overhead(card);
116 spin_unlock_irq(&card->lock);
117
118 err = wait_isoch_resource_delay_after_bus_reset(card);
119 if (err < 0)
120 return err;
121
122 mutex_lock(&r->mutex);
123
124 bandwidth = r->bandwidth + r->bandwidth_overhead;
125 fw_iso_resource_manage(card, r->generation, r->channels_mask,
126 &channel, &bandwidth, true, r->buffer);
127 if (channel == -EAGAIN) {
128 mutex_unlock(&r->mutex);
129 goto retry_after_bus_reset;
130 }
131 if (channel >= 0) {
132 r->channel = channel;
133 r->allocated = true;
134 } else {
135 if (channel == -EBUSY)
136 dev_err(&r->unit->device,
137 "isochronous resources exhausted\n");
138 else
139 dev_err(&r->unit->device,
140 "isochronous resource allocation failed\n");
141 }
142
143 mutex_unlock(&r->mutex);
144
145 return channel;
146}
147
148/**
149 * fw_iso_resources_update - update resource allocations after a bus reset
150 * @r: the resource manager
151 *
152 * This function must be called from the driver's .update handler to reallocate
153 * any resources that were allocated before the bus reset. It is safe to call
154 * this function if no resources are currently allocated.
155 *
156 * Returns a negative error code on failure. If this happens, the caller must
157 * stop streaming.
158 */
159int fw_iso_resources_update(struct fw_iso_resources *r)
160{
161 struct fw_card *card = fw_parent_device(r->unit)->card;
162 int bandwidth, channel;
163
164 mutex_lock(&r->mutex);
165
166 if (!r->allocated) {
167 mutex_unlock(&r->mutex);
168 return 0;
169 }
170
171 spin_lock_irq(&card->lock);
172 r->generation = card->generation;
173 r->bandwidth_overhead = current_bandwidth_overhead(card);
174 spin_unlock_irq(&card->lock);
175
176 bandwidth = r->bandwidth + r->bandwidth_overhead;
177
178 fw_iso_resource_manage(card, r->generation, 1uLL << r->channel,
179 &channel, &bandwidth, true, r->buffer);
180 /*
181 * When another bus reset happens, pretend that the allocation
182 * succeeded; we will try again for the new generation later.
183 */
184 if (channel < 0 && channel != -EAGAIN) {
185 r->allocated = false;
186 if (channel == -EBUSY)
187 dev_err(&r->unit->device,
188 "isochronous resources exhausted\n");
189 else
190 dev_err(&r->unit->device,
191 "isochronous resource allocation failed\n");
192 }
193
194 mutex_unlock(&r->mutex);
195
196 return channel;
197}
198
199/**
200 * fw_iso_resources_free - frees allocated resources
201 * @r: the resource manager
202 *
203 * This function deallocates the channel and bandwidth, if allocated.
204 */
205void fw_iso_resources_free(struct fw_iso_resources *r)
206{
207 struct fw_card *card = fw_parent_device(r->unit)->card;
208 int bandwidth, channel;
209
210 mutex_lock(&r->mutex);
211
212 if (r->allocated) {
213 bandwidth = r->bandwidth + r->bandwidth_overhead;
214 fw_iso_resource_manage(card, r->generation, 1uLL << r->channel,
215 &channel, &bandwidth, false, r->buffer);
216 if (channel < 0)
217 dev_err(&r->unit->device,
218 "isochronous resource deallocation failed\n");
219
220 r->allocated = false;
221 }
222
223 mutex_unlock(&r->mutex);
224}
diff --git a/sound/firewire/iso-resources.h b/sound/firewire/iso-resources.h
new file mode 100644
index 000000000000..9feb9f8d4745
--- /dev/null
+++ b/sound/firewire/iso-resources.h
@@ -0,0 +1,39 @@
1#ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
2#define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
3
4#include <linux/mutex.h>
5#include <linux/types.h>
6
7struct fw_unit;
8
9/**
10 * struct fw_iso_resources - manages channel/bandwidth allocation
11 * @channels_mask: if the device does not support all channel numbers, set this
12 * bit mask to something else than the default (all ones)
13 *
14 * This structure manages (de)allocation of isochronous resources (channel and
15 * bandwidth) for one isochronous stream.
16 */
17struct fw_iso_resources {
18 u64 channels_mask;
19 /* private: */
20 struct fw_unit *unit;
21 struct mutex mutex;
22 unsigned int channel;
23 unsigned int bandwidth; /* in bandwidth units, without overhead */
24 unsigned int bandwidth_overhead;
25 int generation; /* in which allocation is valid */
26 bool allocated;
27 __be32 buffer[2];
28};
29
30void fw_iso_resources_init(struct fw_iso_resources *r,
31 struct fw_unit *unit);
32void fw_iso_resources_destroy(struct fw_iso_resources *r);
33
34int fw_iso_resources_allocate(struct fw_iso_resources *r,
35 unsigned int max_payload_bytes, int speed);
36int fw_iso_resources_update(struct fw_iso_resources *r);
37void fw_iso_resources_free(struct fw_iso_resources *r);
38
39#endif
diff --git a/sound/firewire/lib.c b/sound/firewire/lib.c
new file mode 100644
index 000000000000..4750cea2210e
--- /dev/null
+++ b/sound/firewire/lib.c
@@ -0,0 +1,85 @@
1/*
2 * miscellaneous helper functions
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
8#include <linux/delay.h>
9#include <linux/device.h>
10#include <linux/firewire.h>
11#include <linux/module.h>
12#include "lib.h"
13
14#define ERROR_RETRY_DELAY_MS 5
15
16/**
17 * rcode_string - convert a firewire result code to a string
18 * @rcode: the result
19 */
20const char *rcode_string(unsigned int rcode)
21{
22 static const char *const names[] = {
23 [RCODE_COMPLETE] = "complete",
24 [RCODE_CONFLICT_ERROR] = "conflict error",
25 [RCODE_DATA_ERROR] = "data error",
26 [RCODE_TYPE_ERROR] = "type error",
27 [RCODE_ADDRESS_ERROR] = "address error",
28 [RCODE_SEND_ERROR] = "send error",
29 [RCODE_CANCELLED] = "cancelled",
30 [RCODE_BUSY] = "busy",
31 [RCODE_GENERATION] = "generation",
32 [RCODE_NO_ACK] = "no ack",
33 };
34
35 if (rcode < ARRAY_SIZE(names) && names[rcode])
36 return names[rcode];
37 else
38 return "unknown";
39}
40EXPORT_SYMBOL(rcode_string);
41
42/**
43 * snd_fw_transaction - send a request and wait for its completion
44 * @unit: the driver's unit on the target device
45 * @tcode: the transaction code
46 * @offset: the address in the target's address space
47 * @buffer: input/output data
48 * @length: length of @buffer
49 *
50 * Submits an asynchronous request to the target device, and waits for the
51 * response. The node ID and the current generation are derived from @unit.
52 * On a bus reset or an error, the transaction is retried a few times.
53 * Returns zero on success, or a negative error code.
54 */
55int snd_fw_transaction(struct fw_unit *unit, int tcode,
56 u64 offset, void *buffer, size_t length)
57{
58 struct fw_device *device = fw_parent_device(unit);
59 int generation, rcode, tries = 0;
60
61 for (;;) {
62 generation = device->generation;
63 smp_rmb(); /* node_id vs. generation */
64 rcode = fw_run_transaction(device->card, tcode,
65 device->node_id, generation,
66 device->max_speed, offset,
67 buffer, length);
68
69 if (rcode == RCODE_COMPLETE)
70 return 0;
71
72 if (rcode_is_permanent_error(rcode) || ++tries >= 3) {
73 dev_err(&unit->device, "transaction failed: %s\n",
74 rcode_string(rcode));
75 return -EIO;
76 }
77
78 msleep(ERROR_RETRY_DELAY_MS);
79 }
80}
81EXPORT_SYMBOL(snd_fw_transaction);
82
83MODULE_DESCRIPTION("FireWire audio helper functions");
84MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
85MODULE_LICENSE("GPL v2");
diff --git a/sound/firewire/lib.h b/sound/firewire/lib.h
new file mode 100644
index 000000000000..064f3fd9ab06
--- /dev/null
+++ b/sound/firewire/lib.h
@@ -0,0 +1,19 @@
1#ifndef SOUND_FIREWIRE_LIB_H_INCLUDED
2#define SOUND_FIREWIRE_LIB_H_INCLUDED
3
4#include <linux/firewire-constants.h>
5#include <linux/types.h>
6
7struct fw_unit;
8
9int snd_fw_transaction(struct fw_unit *unit, int tcode,
10 u64 offset, void *buffer, size_t length);
11const char *rcode_string(unsigned int rcode);
12
13/* returns true if retrying the transaction would not make sense */
14static inline bool rcode_is_permanent_error(int rcode)
15{
16 return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR;
17}
18
19#endif
diff --git a/sound/firewire/packets-buffer.c b/sound/firewire/packets-buffer.c
new file mode 100644
index 000000000000..1e20e60ba6a6
--- /dev/null
+++ b/sound/firewire/packets-buffer.c
@@ -0,0 +1,74 @@
1/*
2 * helpers for managing a buffer for many packets
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
8#include <linux/firewire.h>
9#include <linux/slab.h>
10#include "packets-buffer.h"
11
12/**
13 * iso_packets_buffer_init - allocates the memory for packets
14 * @b: the buffer structure to initialize
15 * @unit: the device at the other end of the stream
16 * @count: the number of packets
17 * @packet_size: the (maximum) size of a packet, in bytes
18 * @direction: %DMA_TO_DEVICE or %DMA_FROM_DEVICE
19 */
20int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
21 unsigned int count, unsigned int packet_size,
22 enum dma_data_direction direction)
23{
24 unsigned int packets_per_page, pages;
25 unsigned int i, page_index, offset_in_page;
26 void *p;
27 int err;
28
29 b->packets = kmalloc(count * sizeof(*b->packets), GFP_KERNEL);
30 if (!b->packets) {
31 err = -ENOMEM;
32 goto error;
33 }
34
35 packet_size = L1_CACHE_ALIGN(packet_size);
36 packets_per_page = PAGE_SIZE / packet_size;
37 if (WARN_ON(!packets_per_page)) {
38 err = -EINVAL;
39 goto error;
40 }
41 pages = DIV_ROUND_UP(count, packets_per_page);
42
43 err = fw_iso_buffer_init(&b->iso_buffer, fw_parent_device(unit)->card,
44 pages, direction);
45 if (err < 0)
46 goto err_packets;
47
48 for (i = 0; i < count; ++i) {
49 page_index = i / packets_per_page;
50 p = page_address(b->iso_buffer.pages[page_index]);
51 offset_in_page = (i % packets_per_page) * packet_size;
52 b->packets[i].buffer = p + offset_in_page;
53 b->packets[i].offset = page_index * PAGE_SIZE + offset_in_page;
54 }
55
56 return 0;
57
58err_packets:
59 kfree(b->packets);
60error:
61 return err;
62}
63
64/**
65 * iso_packets_buffer_destroy - frees packet buffer resources
66 * @b: the buffer structure to free
67 * @unit: the device at the other end of the stream
68 */
69void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
70 struct fw_unit *unit)
71{
72 fw_iso_buffer_destroy(&b->iso_buffer, fw_parent_device(unit)->card);
73 kfree(b->packets);
74}
diff --git a/sound/firewire/packets-buffer.h b/sound/firewire/packets-buffer.h
new file mode 100644
index 000000000000..6513c5cb6ea9
--- /dev/null
+++ b/sound/firewire/packets-buffer.h
@@ -0,0 +1,26 @@
1#ifndef SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
2#define SOUND_FIREWIRE_PACKETS_BUFFER_H_INCLUDED
3
4#include <linux/dma-mapping.h>
5#include <linux/firewire.h>
6
7/**
8 * struct iso_packets_buffer - manages a buffer for many packets
9 * @iso_buffer: the memory containing the packets
10 * @packets: an array, with each element pointing to one packet
11 */
12struct iso_packets_buffer {
13 struct fw_iso_buffer iso_buffer;
14 struct {
15 void *buffer;
16 unsigned int offset;
17 } *packets;
18};
19
20int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
21 unsigned int count, unsigned int packet_size,
22 enum dma_data_direction direction);
23void iso_packets_buffer_destroy(struct iso_packets_buffer *b,
24 struct fw_unit *unit);
25
26#endif
diff --git a/sound/firewire/speakers.c b/sound/firewire/speakers.c
new file mode 100644
index 000000000000..f6b095ef075a
--- /dev/null
+++ b/sound/firewire/speakers.c
@@ -0,0 +1,855 @@
1/*
2 * OXFW970-based speakers driver
3 *
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
6 */
7
8#include <linux/device.h>
9#include <linux/firewire.h>
10#include <linux/firewire-constants.h>
11#include <linux/module.h>
12#include <linux/mod_devicetable.h>
13#include <linux/mutex.h>
14#include <linux/slab.h>
15#include <sound/control.h>
16#include <sound/core.h>
17#include <sound/initval.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include "cmp.h"
21#include "fcp.h"
22#include "amdtp.h"
23#include "lib.h"
24
25#define OXFORD_FIRMWARE_ID_ADDRESS (CSR_REGISTER_BASE + 0x50000)
26/* 0x970?vvvv or 0x971?vvvv, where vvvv = firmware version */
27
28#define OXFORD_HARDWARE_ID_ADDRESS (CSR_REGISTER_BASE + 0x90020)
29#define OXFORD_HARDWARE_ID_OXFW970 0x39443841
30#define OXFORD_HARDWARE_ID_OXFW971 0x39373100
31
32#define VENDOR_GRIFFIN 0x001292
33#define VENDOR_LACIE 0x00d04b
34
35#define SPECIFIER_1394TA 0x00a02d
36#define VERSION_AVC 0x010001
37
38struct device_info {
39 const char *driver_name;
40 const char *short_name;
41 const char *long_name;
42 int (*pcm_constraints)(struct snd_pcm_runtime *runtime);
43 unsigned int mixer_channels;
44 u8 mute_fb_id;
45 u8 volume_fb_id;
46};
47
48struct fwspk {
49 struct snd_card *card;
50 struct fw_unit *unit;
51 const struct device_info *device_info;
52 struct snd_pcm_substream *pcm;
53 struct mutex mutex;
54 struct cmp_connection connection;
55 struct amdtp_out_stream stream;
56 bool stream_running;
57 bool mute;
58 s16 volume[6];
59 s16 volume_min;
60 s16 volume_max;
61};
62
63MODULE_DESCRIPTION("FireWire speakers driver");
64MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
65MODULE_LICENSE("GPL v2");
66
67static int firewave_rate_constraint(struct snd_pcm_hw_params *params,
68 struct snd_pcm_hw_rule *rule)
69{
70 static unsigned int stereo_rates[] = { 48000, 96000 };
71 struct snd_interval *channels =
72 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
73 struct snd_interval *rate =
74 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
75
76 /* two channels work only at 48/96 kHz */
77 if (snd_interval_max(channels) < 6)
78 return snd_interval_list(rate, 2, stereo_rates, 0);
79 return 0;
80}
81
82static int firewave_channels_constraint(struct snd_pcm_hw_params *params,
83 struct snd_pcm_hw_rule *rule)
84{
85 static const struct snd_interval all_channels = { .min = 6, .max = 6 };
86 struct snd_interval *rate =
87 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
88 struct snd_interval *channels =
89 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
90
91 /* 32/44.1 kHz work only with all six channels */
92 if (snd_interval_max(rate) < 48000)
93 return snd_interval_refine(channels, &all_channels);
94 return 0;
95}
96
97static int firewave_constraints(struct snd_pcm_runtime *runtime)
98{
99 static unsigned int channels_list[] = { 2, 6 };
100 static struct snd_pcm_hw_constraint_list channels_list_constraint = {
101 .count = 2,
102 .list = channels_list,
103 };
104 int err;
105
106 runtime->hw.rates = SNDRV_PCM_RATE_32000 |
107 SNDRV_PCM_RATE_44100 |
108 SNDRV_PCM_RATE_48000 |
109 SNDRV_PCM_RATE_96000;
110 runtime->hw.channels_max = 6;
111
112 err = snd_pcm_hw_constraint_list(runtime, 0,
113 SNDRV_PCM_HW_PARAM_CHANNELS,
114 &channels_list_constraint);
115 if (err < 0)
116 return err;
117 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
118 firewave_rate_constraint, NULL,
119 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
120 if (err < 0)
121 return err;
122 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
123 firewave_channels_constraint, NULL,
124 SNDRV_PCM_HW_PARAM_RATE, -1);
125 if (err < 0)
126 return err;
127
128 return 0;
129}
130
131static int lacie_speakers_constraints(struct snd_pcm_runtime *runtime)
132{
133 runtime->hw.rates = SNDRV_PCM_RATE_32000 |
134 SNDRV_PCM_RATE_44100 |
135 SNDRV_PCM_RATE_48000 |
136 SNDRV_PCM_RATE_88200 |
137 SNDRV_PCM_RATE_96000;
138
139 return 0;
140}
141
142static int fwspk_open(struct snd_pcm_substream *substream)
143{
144 static const struct snd_pcm_hardware hardware = {
145 .info = SNDRV_PCM_INFO_MMAP |
146 SNDRV_PCM_INFO_MMAP_VALID |
147 SNDRV_PCM_INFO_BATCH |
148 SNDRV_PCM_INFO_INTERLEAVED |
149 SNDRV_PCM_INFO_BLOCK_TRANSFER,
150 .formats = AMDTP_OUT_PCM_FORMAT_BITS,
151 .channels_min = 2,
152 .channels_max = 2,
153 .buffer_bytes_max = 4 * 1024 * 1024,
154 .period_bytes_min = 1,
155 .period_bytes_max = UINT_MAX,
156 .periods_min = 1,
157 .periods_max = UINT_MAX,
158 };
159 struct fwspk *fwspk = substream->private_data;
160 struct snd_pcm_runtime *runtime = substream->runtime;
161 int err;
162
163 runtime->hw = hardware;
164
165 err = fwspk->device_info->pcm_constraints(runtime);
166 if (err < 0)
167 return err;
168 err = snd_pcm_limit_hw_rates(runtime);
169 if (err < 0)
170 return err;
171
172 err = snd_pcm_hw_constraint_minmax(runtime,
173 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
174 5000, 8192000);
175 if (err < 0)
176 return err;
177
178 err = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
179 if (err < 0)
180 return err;
181
182 return 0;
183}
184
185static int fwspk_close(struct snd_pcm_substream *substream)
186{
187 return 0;
188}
189
190static void fwspk_stop_stream(struct fwspk *fwspk)
191{
192 if (fwspk->stream_running) {
193 amdtp_out_stream_stop(&fwspk->stream);
194 cmp_connection_break(&fwspk->connection);
195 fwspk->stream_running = false;
196 }
197}
198
199static int fwspk_set_rate(struct fwspk *fwspk, unsigned int sfc)
200{
201 u8 *buf;
202 int err;
203
204 buf = kmalloc(8, GFP_KERNEL);
205 if (!buf)
206 return -ENOMEM;
207
208 buf[0] = 0x00; /* AV/C, CONTROL */
209 buf[1] = 0xff; /* unit */
210 buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */
211 buf[3] = 0x00; /* plug 0 */
212 buf[4] = 0x90; /* format: audio */
213 buf[5] = 0x00 | sfc; /* AM824, frequency */
214 buf[6] = 0xff; /* SYT (not used) */
215 buf[7] = 0xff;
216
217 err = fcp_avc_transaction(fwspk->unit, buf, 8, buf, 8,
218 BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
219 if (err < 0)
220 goto error;
221 if (err < 6 || buf[0] != 0x09 /* ACCEPTED */) {
222 dev_err(&fwspk->unit->device, "failed to set sample rate\n");
223 err = -EIO;
224 goto error;
225 }
226
227 err = 0;
228
229error:
230 kfree(buf);
231
232 return err;
233}
234
235static int fwspk_hw_params(struct snd_pcm_substream *substream,
236 struct snd_pcm_hw_params *hw_params)
237{
238 struct fwspk *fwspk = substream->private_data;
239 int err;
240
241 mutex_lock(&fwspk->mutex);
242 fwspk_stop_stream(fwspk);
243 mutex_unlock(&fwspk->mutex);
244
245 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
246 params_buffer_bytes(hw_params));
247 if (err < 0)
248 goto error;
249
250 amdtp_out_stream_set_rate(&fwspk->stream, params_rate(hw_params));
251 amdtp_out_stream_set_pcm(&fwspk->stream, params_channels(hw_params));
252
253 amdtp_out_stream_set_pcm_format(&fwspk->stream,
254 params_format(hw_params));
255
256 err = fwspk_set_rate(fwspk, fwspk->stream.sfc);
257 if (err < 0)
258 goto err_buffer;
259
260 return 0;
261
262err_buffer:
263 snd_pcm_lib_free_vmalloc_buffer(substream);
264error:
265 return err;
266}
267
268static int fwspk_hw_free(struct snd_pcm_substream *substream)
269{
270 struct fwspk *fwspk = substream->private_data;
271
272 mutex_lock(&fwspk->mutex);
273 fwspk_stop_stream(fwspk);
274 mutex_unlock(&fwspk->mutex);
275
276 return snd_pcm_lib_free_vmalloc_buffer(substream);
277}
278
279static int fwspk_prepare(struct snd_pcm_substream *substream)
280{
281 struct fwspk *fwspk = substream->private_data;
282 int err;
283
284 mutex_lock(&fwspk->mutex);
285
286 if (!fwspk->stream_running) {
287 err = cmp_connection_establish(&fwspk->connection,
288 amdtp_out_stream_get_max_payload(&fwspk->stream));
289 if (err < 0)
290 goto err_mutex;
291
292 err = amdtp_out_stream_start(&fwspk->stream,
293 fwspk->connection.resources.channel,
294 fwspk->connection.speed);
295 if (err < 0)
296 goto err_connection;
297
298 fwspk->stream_running = true;
299 }
300
301 mutex_unlock(&fwspk->mutex);
302
303 amdtp_out_stream_pcm_prepare(&fwspk->stream);
304
305 return 0;
306
307err_connection:
308 cmp_connection_break(&fwspk->connection);
309err_mutex:
310 mutex_unlock(&fwspk->mutex);
311
312 return err;
313}
314
315static int fwspk_trigger(struct snd_pcm_substream *substream, int cmd)
316{
317 struct fwspk *fwspk = substream->private_data;
318 struct snd_pcm_substream *pcm;
319
320 switch (cmd) {
321 case SNDRV_PCM_TRIGGER_START:
322 pcm = substream;
323 break;
324 case SNDRV_PCM_TRIGGER_STOP:
325 pcm = NULL;
326 break;
327 default:
328 return -EINVAL;
329 }
330 amdtp_out_stream_pcm_trigger(&fwspk->stream, pcm);
331 return 0;
332}
333
334static snd_pcm_uframes_t fwspk_pointer(struct snd_pcm_substream *substream)
335{
336 struct fwspk *fwspk = substream->private_data;
337
338 return amdtp_out_stream_pcm_pointer(&fwspk->stream);
339}
340
341static int fwspk_create_pcm(struct fwspk *fwspk)
342{
343 static struct snd_pcm_ops ops = {
344 .open = fwspk_open,
345 .close = fwspk_close,
346 .ioctl = snd_pcm_lib_ioctl,
347 .hw_params = fwspk_hw_params,
348 .hw_free = fwspk_hw_free,
349 .prepare = fwspk_prepare,
350 .trigger = fwspk_trigger,
351 .pointer = fwspk_pointer,
352 .page = snd_pcm_lib_get_vmalloc_page,
353 .mmap = snd_pcm_lib_mmap_vmalloc,
354 };
355 struct snd_pcm *pcm;
356 int err;
357
358 err = snd_pcm_new(fwspk->card, "OXFW970", 0, 1, 0, &pcm);
359 if (err < 0)
360 return err;
361 pcm->private_data = fwspk;
362 strcpy(pcm->name, fwspk->device_info->short_name);
363 fwspk->pcm = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
364 fwspk->pcm->ops = &ops;
365 return 0;
366}
367
368enum control_action { CTL_READ, CTL_WRITE };
369enum control_attribute {
370 CTL_MIN = 0x02,
371 CTL_MAX = 0x03,
372 CTL_CURRENT = 0x10,
373};
374
375static int fwspk_mute_command(struct fwspk *fwspk, bool *value,
376 enum control_action action)
377{
378 u8 *buf;
379 u8 response_ok;
380 int err;
381
382 buf = kmalloc(11, GFP_KERNEL);
383 if (!buf)
384 return -ENOMEM;
385
386 if (action == CTL_READ) {
387 buf[0] = 0x01; /* AV/C, STATUS */
388 response_ok = 0x0c; /* STABLE */
389 } else {
390 buf[0] = 0x00; /* AV/C, CONTROL */
391 response_ok = 0x09; /* ACCEPTED */
392 }
393 buf[1] = 0x08; /* audio unit 0 */
394 buf[2] = 0xb8; /* FUNCTION BLOCK */
395 buf[3] = 0x81; /* function block type: feature */
396 buf[4] = fwspk->device_info->mute_fb_id; /* function block ID */
397 buf[5] = 0x10; /* control attribute: current */
398 buf[6] = 0x02; /* selector length */
399 buf[7] = 0x00; /* audio channel number */
400 buf[8] = 0x01; /* control selector: mute */
401 buf[9] = 0x01; /* control data length */
402 if (action == CTL_READ)
403 buf[10] = 0xff;
404 else
405 buf[10] = *value ? 0x70 : 0x60;
406
407 err = fcp_avc_transaction(fwspk->unit, buf, 11, buf, 11, 0x3fe);
408 if (err < 0)
409 goto error;
410 if (err < 11) {
411 dev_err(&fwspk->unit->device, "short FCP response\n");
412 err = -EIO;
413 goto error;
414 }
415 if (buf[0] != response_ok) {
416 dev_err(&fwspk->unit->device, "mute command failed\n");
417 err = -EIO;
418 goto error;
419 }
420 if (action == CTL_READ)
421 *value = buf[10] == 0x70;
422
423 err = 0;
424
425error:
426 kfree(buf);
427
428 return err;
429}
430
431static int fwspk_volume_command(struct fwspk *fwspk, s16 *value,
432 unsigned int channel,
433 enum control_attribute attribute,
434 enum control_action action)
435{
436 u8 *buf;
437 u8 response_ok;
438 int err;
439
440 buf = kmalloc(12, GFP_KERNEL);
441 if (!buf)
442 return -ENOMEM;
443
444 if (action == CTL_READ) {
445 buf[0] = 0x01; /* AV/C, STATUS */
446 response_ok = 0x0c; /* STABLE */
447 } else {
448 buf[0] = 0x00; /* AV/C, CONTROL */
449 response_ok = 0x09; /* ACCEPTED */
450 }
451 buf[1] = 0x08; /* audio unit 0 */
452 buf[2] = 0xb8; /* FUNCTION BLOCK */
453 buf[3] = 0x81; /* function block type: feature */
454 buf[4] = fwspk->device_info->volume_fb_id; /* function block ID */
455 buf[5] = attribute; /* control attribute */
456 buf[6] = 0x02; /* selector length */
457 buf[7] = channel; /* audio channel number */
458 buf[8] = 0x02; /* control selector: volume */
459 buf[9] = 0x02; /* control data length */
460 if (action == CTL_READ) {
461 buf[10] = 0xff;
462 buf[11] = 0xff;
463 } else {
464 buf[10] = *value >> 8;
465 buf[11] = *value;
466 }
467
468 err = fcp_avc_transaction(fwspk->unit, buf, 12, buf, 12, 0x3fe);
469 if (err < 0)
470 goto error;
471 if (err < 12) {
472 dev_err(&fwspk->unit->device, "short FCP response\n");
473 err = -EIO;
474 goto error;
475 }
476 if (buf[0] != response_ok) {
477 dev_err(&fwspk->unit->device, "volume command failed\n");
478 err = -EIO;
479 goto error;
480 }
481 if (action == CTL_READ)
482 *value = (buf[10] << 8) | buf[11];
483
484 err = 0;
485
486error:
487 kfree(buf);
488
489 return err;
490}
491
492static int fwspk_mute_get(struct snd_kcontrol *control,
493 struct snd_ctl_elem_value *value)
494{
495 struct fwspk *fwspk = control->private_data;
496
497 value->value.integer.value[0] = !fwspk->mute;
498
499 return 0;
500}
501
502static int fwspk_mute_put(struct snd_kcontrol *control,
503 struct snd_ctl_elem_value *value)
504{
505 struct fwspk *fwspk = control->private_data;
506 bool mute;
507 int err;
508
509 mute = !value->value.integer.value[0];
510
511 if (mute == fwspk->mute)
512 return 0;
513
514 err = fwspk_mute_command(fwspk, &mute, CTL_WRITE);
515 if (err < 0)
516 return err;
517 fwspk->mute = mute;
518
519 return 1;
520}
521
522static int fwspk_volume_info(struct snd_kcontrol *control,
523 struct snd_ctl_elem_info *info)
524{
525 struct fwspk *fwspk = control->private_data;
526
527 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
528 info->count = fwspk->device_info->mixer_channels;
529 info->value.integer.min = fwspk->volume_min;
530 info->value.integer.max = fwspk->volume_max;
531
532 return 0;
533}
534
535static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
536
537static int fwspk_volume_get(struct snd_kcontrol *control,
538 struct snd_ctl_elem_value *value)
539{
540 struct fwspk *fwspk = control->private_data;
541 unsigned int i;
542
543 for (i = 0; i < fwspk->device_info->mixer_channels; ++i)
544 value->value.integer.value[channel_map[i]] = fwspk->volume[i];
545
546 return 0;
547}
548
549static int fwspk_volume_put(struct snd_kcontrol *control,
550 struct snd_ctl_elem_value *value)
551{
552 struct fwspk *fwspk = control->private_data;
553 unsigned int i, changed_channels;
554 bool equal_values = true;
555 s16 volume;
556 int err;
557
558 for (i = 0; i < fwspk->device_info->mixer_channels; ++i) {
559 if (value->value.integer.value[i] < fwspk->volume_min ||
560 value->value.integer.value[i] > fwspk->volume_max)
561 return -EINVAL;
562 if (value->value.integer.value[i] !=
563 value->value.integer.value[0])
564 equal_values = false;
565 }
566
567 changed_channels = 0;
568 for (i = 0; i < fwspk->device_info->mixer_channels; ++i)
569 if (value->value.integer.value[channel_map[i]] !=
570 fwspk->volume[i])
571 changed_channels |= 1 << (i + 1);
572
573 if (equal_values && changed_channels != 0)
574 changed_channels = 1 << 0;
575
576 for (i = 0; i <= fwspk->device_info->mixer_channels; ++i) {
577 volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
578 if (changed_channels & (1 << i)) {
579 err = fwspk_volume_command(fwspk, &volume, i,
580 CTL_CURRENT, CTL_WRITE);
581 if (err < 0)
582 return err;
583 }
584 if (i > 0)
585 fwspk->volume[i - 1] = volume;
586 }
587
588 return changed_channels != 0;
589}
590
591static int fwspk_create_mixer(struct fwspk *fwspk)
592{
593 static const struct snd_kcontrol_new controls[] = {
594 {
595 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
596 .name = "PCM Playback Switch",
597 .info = snd_ctl_boolean_mono_info,
598 .get = fwspk_mute_get,
599 .put = fwspk_mute_put,
600 },
601 {
602 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
603 .name = "PCM Playback Volume",
604 .info = fwspk_volume_info,
605 .get = fwspk_volume_get,
606 .put = fwspk_volume_put,
607 },
608 };
609 unsigned int i, first_ch;
610 int err;
611
612 err = fwspk_volume_command(fwspk, &fwspk->volume_min,
613 0, CTL_MIN, CTL_READ);
614 if (err < 0)
615 return err;
616 err = fwspk_volume_command(fwspk, &fwspk->volume_max,
617 0, CTL_MAX, CTL_READ);
618 if (err < 0)
619 return err;
620
621 err = fwspk_mute_command(fwspk, &fwspk->mute, CTL_READ);
622 if (err < 0)
623 return err;
624
625 first_ch = fwspk->device_info->mixer_channels == 1 ? 0 : 1;
626 for (i = 0; i < fwspk->device_info->mixer_channels; ++i) {
627 err = fwspk_volume_command(fwspk, &fwspk->volume[i],
628 first_ch + i, CTL_CURRENT, CTL_READ);
629 if (err < 0)
630 return err;
631 }
632
633 for (i = 0; i < ARRAY_SIZE(controls); ++i) {
634 err = snd_ctl_add(fwspk->card,
635 snd_ctl_new1(&controls[i], fwspk));
636 if (err < 0)
637 return err;
638 }
639
640 return 0;
641}
642
643static u32 fwspk_read_firmware_version(struct fw_unit *unit)
644{
645 __be32 data;
646 int err;
647
648 err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
649 OXFORD_FIRMWARE_ID_ADDRESS, &data, 4);
650 return err >= 0 ? be32_to_cpu(data) : 0;
651}
652
653static void fwspk_card_free(struct snd_card *card)
654{
655 struct fwspk *fwspk = card->private_data;
656 struct fw_device *dev = fw_parent_device(fwspk->unit);
657
658 amdtp_out_stream_destroy(&fwspk->stream);
659 cmp_connection_destroy(&fwspk->connection);
660 fw_unit_put(fwspk->unit);
661 fw_device_put(dev);
662 mutex_destroy(&fwspk->mutex);
663}
664
665static const struct device_info *__devinit fwspk_detect(struct fw_device *dev)
666{
667 static const struct device_info griffin_firewave = {
668 .driver_name = "FireWave",
669 .short_name = "FireWave",
670 .long_name = "Griffin FireWave Surround",
671 .pcm_constraints = firewave_constraints,
672 .mixer_channels = 6,
673 .mute_fb_id = 0x01,
674 .volume_fb_id = 0x02,
675 };
676 static const struct device_info lacie_speakers = {
677 .driver_name = "FWSpeakers",
678 .short_name = "FireWire Speakers",
679 .long_name = "LaCie FireWire Speakers",
680 .pcm_constraints = lacie_speakers_constraints,
681 .mixer_channels = 1,
682 .mute_fb_id = 0x01,
683 .volume_fb_id = 0x01,
684 };
685 struct fw_csr_iterator i;
686 int key, value;
687
688 fw_csr_iterator_init(&i, dev->config_rom);
689 while (fw_csr_iterator_next(&i, &key, &value))
690 if (key == CSR_VENDOR)
691 switch (value) {
692 case VENDOR_GRIFFIN:
693 return &griffin_firewave;
694 case VENDOR_LACIE:
695 return &lacie_speakers;
696 }
697
698 return NULL;
699}
700
701static int __devinit fwspk_probe(struct device *unit_dev)
702{
703 struct fw_unit *unit = fw_unit(unit_dev);
704 struct fw_device *fw_dev = fw_parent_device(unit);
705 struct snd_card *card;
706 struct fwspk *fwspk;
707 u32 firmware;
708 int err;
709
710 err = snd_card_create(-1, NULL, THIS_MODULE, sizeof(*fwspk), &card);
711 if (err < 0)
712 return err;
713 snd_card_set_dev(card, unit_dev);
714
715 fwspk = card->private_data;
716 fwspk->card = card;
717 mutex_init(&fwspk->mutex);
718 fw_device_get(fw_dev);
719 fwspk->unit = fw_unit_get(unit);
720 fwspk->device_info = fwspk_detect(fw_dev);
721 if (!fwspk->device_info) {
722 err = -ENODEV;
723 goto err_unit;
724 }
725
726 err = cmp_connection_init(&fwspk->connection, unit, 0);
727 if (err < 0)
728 goto err_unit;
729
730 err = amdtp_out_stream_init(&fwspk->stream, unit, CIP_NONBLOCKING);
731 if (err < 0)
732 goto err_connection;
733
734 card->private_free = fwspk_card_free;
735
736 strcpy(card->driver, fwspk->device_info->driver_name);
737 strcpy(card->shortname, fwspk->device_info->short_name);
738 firmware = fwspk_read_firmware_version(unit);
739 snprintf(card->longname, sizeof(card->longname),
740 "%s (OXFW%x %04x), GUID %08x%08x at %s, S%d",
741 fwspk->device_info->long_name,
742 firmware >> 20, firmware & 0xffff,
743 fw_dev->config_rom[3], fw_dev->config_rom[4],
744 dev_name(&unit->device), 100 << fw_dev->max_speed);
745 strcpy(card->mixername, "OXFW970");
746
747 err = fwspk_create_pcm(fwspk);
748 if (err < 0)
749 goto error;
750
751 err = fwspk_create_mixer(fwspk);
752 if (err < 0)
753 goto error;
754
755 err = snd_card_register(card);
756 if (err < 0)
757 goto error;
758
759 dev_set_drvdata(unit_dev, fwspk);
760
761 return 0;
762
763err_connection:
764 cmp_connection_destroy(&fwspk->connection);
765err_unit:
766 fw_unit_put(fwspk->unit);
767 fw_device_put(fw_dev);
768 mutex_destroy(&fwspk->mutex);
769error:
770 snd_card_free(card);
771 return err;
772}
773
774static int __devexit fwspk_remove(struct device *dev)
775{
776 struct fwspk *fwspk = dev_get_drvdata(dev);
777
778 snd_card_disconnect(fwspk->card);
779
780 mutex_lock(&fwspk->mutex);
781 amdtp_out_stream_pcm_abort(&fwspk->stream);
782 fwspk_stop_stream(fwspk);
783 mutex_unlock(&fwspk->mutex);
784
785 snd_card_free_when_closed(fwspk->card);
786
787 return 0;
788}
789
790static void fwspk_bus_reset(struct fw_unit *unit)
791{
792 struct fwspk *fwspk = dev_get_drvdata(&unit->device);
793
794 fcp_bus_reset(fwspk->unit);
795
796 if (cmp_connection_update(&fwspk->connection) < 0) {
797 mutex_lock(&fwspk->mutex);
798 amdtp_out_stream_pcm_abort(&fwspk->stream);
799 fwspk_stop_stream(fwspk);
800 mutex_unlock(&fwspk->mutex);
801 return;
802 }
803
804 amdtp_out_stream_update(&fwspk->stream);
805}
806
807static const struct ieee1394_device_id fwspk_id_table[] = {
808 {
809 .match_flags = IEEE1394_MATCH_VENDOR_ID |
810 IEEE1394_MATCH_MODEL_ID |
811 IEEE1394_MATCH_SPECIFIER_ID |
812 IEEE1394_MATCH_VERSION,
813 .vendor_id = VENDOR_GRIFFIN,
814 .model_id = 0x00f970,
815 .specifier_id = SPECIFIER_1394TA,
816 .version = VERSION_AVC,
817 },
818 {
819 .match_flags = IEEE1394_MATCH_VENDOR_ID |
820 IEEE1394_MATCH_MODEL_ID |
821 IEEE1394_MATCH_SPECIFIER_ID |
822 IEEE1394_MATCH_VERSION,
823 .vendor_id = VENDOR_LACIE,
824 .model_id = 0x00f970,
825 .specifier_id = SPECIFIER_1394TA,
826 .version = VERSION_AVC,
827 },
828 { }
829};
830MODULE_DEVICE_TABLE(ieee1394, fwspk_id_table);
831
832static struct fw_driver fwspk_driver = {
833 .driver = {
834 .owner = THIS_MODULE,
835 .name = KBUILD_MODNAME,
836 .bus = &fw_bus_type,
837 .probe = fwspk_probe,
838 .remove = __devexit_p(fwspk_remove),
839 },
840 .update = fwspk_bus_reset,
841 .id_table = fwspk_id_table,
842};
843
844static int __init alsa_fwspk_init(void)
845{
846 return driver_register(&fwspk_driver.driver);
847}
848
849static void __exit alsa_fwspk_exit(void)
850{
851 driver_unregister(&fwspk_driver.driver);
852}
853
854module_init(alsa_fwspk_init);
855module_exit(alsa_fwspk_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 12:20:30 -0500