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code style scripts/checkpatch.pl (linux-3.9-rc1) formatting
[linux-2.6.34.14-moxart.git] / sound / pci / hda / hda_eld.c
blobf5852006d8bad76318c5be96781c0694a98241a9
1 /*
2 * Generic routines and proc interface for ELD(EDID Like Data) information
3 *
4 * Copyright(c) 2008 Intel Corporation.
5 *
6 * Authors:
7 * Wu Fengguang <wfg@linux.intel.com>
8 *
9 * This driver is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This driver is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <sound/core.h>
27 #include <asm/unaligned.h>
28 #include "hda_codec.h"
29 #include "hda_local.h"
30
31 enum eld_versions {
32 ELD_VER_CEA_861D = 2,
33 ELD_VER_PARTIAL = 31,
34 };
35
36 enum cea_edid_versions {
37 CEA_EDID_VER_NONE = 0,
38 CEA_EDID_VER_CEA861 = 1,
39 CEA_EDID_VER_CEA861A = 2,
40 CEA_EDID_VER_CEA861BCD = 3,
41 CEA_EDID_VER_RESERVED = 4,
42 };
43
44 static char *cea_speaker_allocation_names[] = {
45 /* 0 */ "FL/FR",
46 /* 1 */ "LFE",
47 /* 2 */ "FC",
48 /* 3 */ "RL/RR",
49 /* 4 */ "RC",
50 /* 5 */ "FLC/FRC",
51 /* 6 */ "RLC/RRC",
52 /* 7 */ "FLW/FRW",
53 /* 8 */ "FLH/FRH",
54 /* 9 */ "TC",
55 /* 10 */ "FCH",
56 };
57
58 static char *eld_connection_type_names[4] = {
59 "HDMI",
60 "DisplayPort",
61 "2-reserved",
62 "3-reserved"
63 };
64
65 enum cea_audio_coding_types {
66 AUDIO_CODING_TYPE_REF_STREAM_HEADER = 0,
67 AUDIO_CODING_TYPE_LPCM = 1,
68 AUDIO_CODING_TYPE_AC3 = 2,
69 AUDIO_CODING_TYPE_MPEG1 = 3,
70 AUDIO_CODING_TYPE_MP3 = 4,
71 AUDIO_CODING_TYPE_MPEG2 = 5,
72 AUDIO_CODING_TYPE_AACLC = 6,
73 AUDIO_CODING_TYPE_DTS = 7,
74 AUDIO_CODING_TYPE_ATRAC = 8,
75 AUDIO_CODING_TYPE_SACD = 9,
76 AUDIO_CODING_TYPE_EAC3 = 10,
77 AUDIO_CODING_TYPE_DTS_HD = 11,
78 AUDIO_CODING_TYPE_MLP = 12,
79 AUDIO_CODING_TYPE_DST = 13,
80 AUDIO_CODING_TYPE_WMAPRO = 14,
81 AUDIO_CODING_TYPE_REF_CXT = 15,
82 /* also include valid xtypes below */
83 AUDIO_CODING_TYPE_HE_AAC = 15,
84 AUDIO_CODING_TYPE_HE_AAC2 = 16,
85 AUDIO_CODING_TYPE_MPEG_SURROUND = 17,
86 };
87
88 enum cea_audio_coding_xtypes {
89 AUDIO_CODING_XTYPE_HE_REF_CT = 0,
90 AUDIO_CODING_XTYPE_HE_AAC = 1,
91 AUDIO_CODING_XTYPE_HE_AAC2 = 2,
92 AUDIO_CODING_XTYPE_MPEG_SURROUND = 3,
93 AUDIO_CODING_XTYPE_FIRST_RESERVED = 4,
94 };
95
96 static char *cea_audio_coding_type_names[] = {
97 /* 0 */ "undefined",
98 /* 1 */ "LPCM",
99 /* 2 */ "AC-3",
100 /* 3 */ "MPEG1",
101 /* 4 */ "MP3",
102 /* 5 */ "MPEG2",
103 /* 6 */ "AAC-LC",
104 /* 7 */ "DTS",
105 /* 8 */ "ATRAC",
106 /* 9 */ "DSD (One Bit Audio)",
107 /* 10 */ "E-AC-3/DD+ (Dolby Digital Plus)",
108 /* 11 */ "DTS-HD",
109 /* 12 */ "MLP (Dolby TrueHD)",
110 /* 13 */ "DST",
111 /* 14 */ "WMAPro",
112 /* 15 */ "HE-AAC",
113 /* 16 */ "HE-AACv2",
114 /* 17 */ "MPEG Surround",
115 };
116
117 /*
118 * The following two lists are shared between
119 * - HDMI audio InfoFrame (source to sink)
120 * - CEA E-EDID Extension (sink to source)
121 */
122
123 /*
124 * SS1:SS0 index => sample size
125 */
126 static int cea_sample_sizes[4] = {
127 0, /* 0: Refer to Stream Header */
128 AC_SUPPCM_BITS_16, /* 1: 16 bits */
129 AC_SUPPCM_BITS_20, /* 2: 20 bits */
130 AC_SUPPCM_BITS_24, /* 3: 24 bits */
131 };
132
133 /*
134 * SF2:SF1:SF0 index => sampling frequency
135 */
136 static int cea_sampling_frequencies[8] = {
137 0, /* 0: Refer to Stream Header */
138 SNDRV_PCM_RATE_32000, /* 1: 32000Hz */
139 SNDRV_PCM_RATE_44100, /* 2: 44100Hz */
140 SNDRV_PCM_RATE_48000, /* 3: 48000Hz */
141 SNDRV_PCM_RATE_88200, /* 4: 88200Hz */
142 SNDRV_PCM_RATE_96000, /* 5: 96000Hz */
143 SNDRV_PCM_RATE_176400, /* 6: 176400Hz */
144 SNDRV_PCM_RATE_192000, /* 7: 192000Hz */
145 };
146
147 static unsigned char hdmi_get_eld_byte(struct hda_codec *codec, hda_nid_t nid,
148 int byte_index)
149 {
150 unsigned int val;
151
152 val = snd_hda_codec_read(codec, nid, 0,
153 AC_VERB_GET_HDMI_ELDD, byte_index);
154
155 #ifdef BE_PARANOID
156 printk(KERN_INFO "HDMI: ELD data byte %d: 0x%x\n", byte_index, val);
157 #endif
158
159 if ((val & AC_ELDD_ELD_VALID) == 0) {
160 snd_printd(KERN_INFO "HDMI: invalid ELD data byte %d\n",
161 byte_index);
162 val = 0;
163 }
164
165 return val & AC_ELDD_ELD_DATA;
166 }
167
168 #define GRAB_BITS(buf, byte, lowbit, bits) \
169 ({ \
170 BUILD_BUG_ON(lowbit > 7); \
171 BUILD_BUG_ON(bits > 8); \
172 BUILD_BUG_ON(bits <= 0); \
173 \
174 (buf[byte] >> (lowbit)) & ((1 << (bits)) - 1); \
175 })
176
177 static void hdmi_update_short_audio_desc(struct cea_sad *a,
178 const unsigned char *buf)
179 {
180 int i;
181 int val;
182
183 val = GRAB_BITS(buf, 1, 0, 7);
184 a->rates = 0;
185 for (i = 0; i < 7; i++)
186 if (val & (1 << i))
187 a->rates |= cea_sampling_frequencies[i + 1];
188
189 a->channels = GRAB_BITS(buf, 0, 0, 3);
190 a->channels++;
191
192 a->format = GRAB_BITS(buf, 0, 3, 4);
193 switch (a->format) {
194 case AUDIO_CODING_TYPE_REF_STREAM_HEADER:
195 snd_printd(KERN_INFO
196 "HDMI: audio coding type 0 not expected\n");
197 break;
198
199 case AUDIO_CODING_TYPE_LPCM:
200 val = GRAB_BITS(buf, 2, 0, 3);
201 a->sample_bits = 0;
202 for (i = 0; i < 3; i++)
203 if (val & (1 << i))
204 a->sample_bits |= cea_sample_sizes[i + 1];
205 break;
206
207 case AUDIO_CODING_TYPE_AC3:
208 case AUDIO_CODING_TYPE_MPEG1:
209 case AUDIO_CODING_TYPE_MP3:
210 case AUDIO_CODING_TYPE_MPEG2:
211 case AUDIO_CODING_TYPE_AACLC:
212 case AUDIO_CODING_TYPE_DTS:
213 case AUDIO_CODING_TYPE_ATRAC:
214 a->max_bitrate = GRAB_BITS(buf, 2, 0, 8);
215 a->max_bitrate *= 8000;
216 break;
217
218 case AUDIO_CODING_TYPE_SACD:
219 break;
220
221 case AUDIO_CODING_TYPE_EAC3:
222 break;
223
224 case AUDIO_CODING_TYPE_DTS_HD:
225 break;
226
227 case AUDIO_CODING_TYPE_MLP:
228 break;
229
230 case AUDIO_CODING_TYPE_DST:
231 break;
232
233 case AUDIO_CODING_TYPE_WMAPRO:
234 a->profile = GRAB_BITS(buf, 2, 0, 3);
235 break;
236
237 case AUDIO_CODING_TYPE_REF_CXT:
238 a->format = GRAB_BITS(buf, 2, 3, 5);
239 if (a->format == AUDIO_CODING_XTYPE_HE_REF_CT ||
240 a->format >= AUDIO_CODING_XTYPE_FIRST_RESERVED) {
241 snd_printd(KERN_INFO
242 "HDMI: audio coding xtype %d not expected\n",
243 a->format);
244 a->format = 0;
245 } else
246 a->format += AUDIO_CODING_TYPE_HE_AAC -
247 AUDIO_CODING_XTYPE_HE_AAC;
248 break;
249 }
250 }
251
252 /*
253 * Be careful, ELD buf could be totally rubbish!
254 */
255 static int hdmi_update_eld(struct hdmi_eld *e,
256 const unsigned char *buf, int size)
257 {
258 int mnl;
259 int i;
260
261 e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
262 if (e->eld_ver != ELD_VER_CEA_861D &&
263 e->eld_ver != ELD_VER_PARTIAL) {
264 snd_printd(KERN_INFO "HDMI: Unknown ELD version %d\n",
265 e->eld_ver);
266 goto out_fail;
267 }
268
269 e->eld_size = size;
270 e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
271 mnl = GRAB_BITS(buf, 4, 0, 5);
272 e->cea_edid_ver = GRAB_BITS(buf, 4, 5, 3);
273
274 e->support_hdcp = GRAB_BITS(buf, 5, 0, 1);
275 e->support_ai = GRAB_BITS(buf, 5, 1, 1);
276 e->conn_type = GRAB_BITS(buf, 5, 2, 2);
277 e->sad_count = GRAB_BITS(buf, 5, 4, 4);
278
279 e->aud_synch_delay = GRAB_BITS(buf, 6, 0, 8) * 2;
280 e->spk_alloc = GRAB_BITS(buf, 7, 0, 7);
281
282 e->port_id = get_unaligned_le64(buf + 8);
283
284 /* not specified, but the spec's tendency is little endian */
285 e->manufacture_id = get_unaligned_le16(buf + 16);
286 e->product_id = get_unaligned_le16(buf + 18);
287
288 if (mnl > ELD_MAX_MNL) {
289 snd_printd(KERN_INFO "HDMI: MNL is reserved value %d\n", mnl);
290 goto out_fail;
291 } else if (ELD_FIXED_BYTES + mnl > size) {
292 snd_printd(KERN_INFO "HDMI: out of range MNL %d\n", mnl);
293 goto out_fail;
294 } else
295 strlcpy(e->monitor_name, buf + ELD_FIXED_BYTES, mnl);
296
297 for (i = 0; i < e->sad_count; i++) {
298 if (ELD_FIXED_BYTES + mnl + 3 * (i + 1) > size) {
299 snd_printd(KERN_INFO "HDMI: out of range SAD %d\n", i);
300 goto out_fail;
301 }
302 hdmi_update_short_audio_desc(e->sad + i,
303 buf + ELD_FIXED_BYTES + mnl + 3 * i);
304 }
305
306 return 0;
307
308 out_fail:
309 e->eld_ver = 0;
310 return -EINVAL;
311 }
312
313 static int hdmi_eld_valid(struct hda_codec *codec, hda_nid_t nid)
314 {
315 int eldv;
316 int present;
317
318 present = snd_hda_pin_sense(codec, nid);
319 eldv = (present & AC_PINSENSE_ELDV);
320 present = (present & AC_PINSENSE_PRESENCE);
321
322 #ifdef CONFIG_SND_DEBUG_VERBOSE
323 printk(KERN_INFO "HDMI: sink_present = %d, eld_valid = %d\n",
324 !!present, !!eldv);
325 #endif
326
327 return eldv && present;
328 }
329
330 int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
331 {
332 return snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
333 AC_DIPSIZE_ELD_BUF);
334 }
335 EXPORT_SYMBOL_HDA(snd_hdmi_get_eld_size);
336
337 int snd_hdmi_get_eld(struct hdmi_eld *eld,
338 struct hda_codec *codec, hda_nid_t nid)
339 {
340 int i;
341 int ret;
342 int size;
343 unsigned char *buf;
344
345 if (!hdmi_eld_valid(codec, nid))
346 return -ENOENT;
347
348 size = snd_hdmi_get_eld_size(codec, nid);
349 if (size == 0) {
350 /* wfg: workaround for ASUS P5E-VM HDMI board */
351 snd_printd(KERN_INFO "HDMI: ELD buf size is 0, force 128\n");
352 size = 128;
353 }
354 if (size < ELD_FIXED_BYTES || size > PAGE_SIZE) {
355 snd_printd(KERN_INFO "HDMI: invalid ELD buf size %d\n", size);
356 return -ERANGE;
357 }
358
359 buf = kmalloc(size, GFP_KERNEL);
360 if (!buf)
361 return -ENOMEM;
362
363 for (i = 0; i < size; i++)
364 buf[i] = hdmi_get_eld_byte(codec, nid, i);
365
366 ret = hdmi_update_eld(eld, buf, size);
367
368 kfree(buf);
369 return ret;
370 }
371 EXPORT_SYMBOL_HDA(snd_hdmi_get_eld);
372
373 static void hdmi_show_short_audio_desc(struct cea_sad *a)
374 {
375 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
376 char buf2[8 + SND_PRINT_BITS_ADVISED_BUFSIZE] = ", bits =";
377
378 if (!a->format)
379 return;
380
381 snd_print_pcm_rates(a->rates, buf, sizeof(buf));
382
383 if (a->format == AUDIO_CODING_TYPE_LPCM)
384 snd_print_pcm_bits(a->sample_bits, buf2 + 8, sizeof(buf2) - 8);
385 else if (a->max_bitrate)
386 snprintf(buf2, sizeof(buf2),
387 ", max bitrate = %d", a->max_bitrate);
388 else
389 buf2[0] = '\0';
390
391 printk(KERN_INFO "HDMI: supports coding type %s:"
392 " channels = %d, rates =%s%s\n",
393 cea_audio_coding_type_names[a->format],
394 a->channels,
395 buf,
396 buf2);
397 }
398
399 void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
400 {
401 int i, j;
402
403 for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) {
404 if (spk_alloc & (1 << i))
405 j += snprintf(buf + j, buflen - j, " %s",
406 cea_speaker_allocation_names[i]);
407 }
408 buf[j] = '\0'; /* necessary when j == 0 */
409 }
410 EXPORT_SYMBOL_HDA(snd_print_channel_allocation);
411
412 void snd_hdmi_show_eld(struct hdmi_eld *e)
413 {
414 int i;
415
416 printk(KERN_INFO "HDMI: detected monitor %s at connection type %s\n",
417 e->monitor_name,
418 eld_connection_type_names[e->conn_type]);
419
420 if (e->spk_alloc) {
421 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
422 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
423 printk(KERN_INFO "HDMI: available speakers:%s\n", buf);
424 }
425
426 for (i = 0; i < e->sad_count; i++)
427 hdmi_show_short_audio_desc(e->sad + i);
428 }
429 EXPORT_SYMBOL_HDA(snd_hdmi_show_eld);
430
431 #ifdef CONFIG_PROC_FS
432
433 static void hdmi_print_sad_info(int i, struct cea_sad *a,
434 struct snd_info_buffer *buffer)
435 {
436 char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
437
438 snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
439 i, a->format, cea_audio_coding_type_names[a->format]);
440 snd_iprintf(buffer, "sad%d_channels\t\t%d\n", i, a->channels);
441
442 snd_print_pcm_rates(a->rates, buf, sizeof(buf));
443 snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
444
445 if (a->format == AUDIO_CODING_TYPE_LPCM) {
446 snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
447 snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
448 i, a->sample_bits, buf);
449 }
450
451 if (a->max_bitrate)
452 snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",
453 i, a->max_bitrate);
454
455 if (a->profile)
456 snd_iprintf(buffer, "sad%d_profile\t\t%d\n", i, a->profile);
457 }
458
459 static void hdmi_print_eld_info(struct snd_info_entry *entry,
460 struct snd_info_buffer *buffer)
461 {
462 struct hdmi_eld *e = entry->private_data;
463 char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
464 int i;
465 static char *eld_versoin_names[32] = {
466 "reserved",
467 "reserved",
468 "CEA-861D or below",
469 [3 ... 30] = "reserved",
470 [31] = "partial"
471 };
472 static char *cea_edid_version_names[8] = {
473 "no CEA EDID Timing Extension block present",
474 "CEA-861",
475 "CEA-861-A",
476 "CEA-861-B, C or D",
477 [4 ... 7] = "reserved"
478 };
479
480 snd_iprintf(buffer, "monitor_present\t\t%d\n", e->monitor_present);
481 snd_iprintf(buffer, "eld_valid\t\t%d\n", e->eld_valid);
482 snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
483 snd_iprintf(buffer, "connection_type\t\t%s\n",
484 eld_connection_type_names[e->conn_type]);
485 snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
486 eld_versoin_names[e->eld_ver]);
487 snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
488 cea_edid_version_names[e->cea_edid_ver]);
489 snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
490 snd_iprintf(buffer, "product_id\t\t0x%x\n", e->product_id);
491 snd_iprintf(buffer, "port_id\t\t\t0x%llx\n", (long long)e->port_id);
492 snd_iprintf(buffer, "support_hdcp\t\t%d\n", e->support_hdcp);
493 snd_iprintf(buffer, "support_ai\t\t%d\n", e->support_ai);
494 snd_iprintf(buffer, "audio_sync_delay\t%d\n", e->aud_synch_delay);
495
496 snd_print_channel_allocation(e->spk_alloc, buf, sizeof(buf));
497 snd_iprintf(buffer, "speakers\t\t[0x%x]%s\n", e->spk_alloc, buf);
498
499 snd_iprintf(buffer, "sad_count\t\t%d\n", e->sad_count);
500
501 for (i = 0; i < e->sad_count; i++)
502 hdmi_print_sad_info(i, e->sad + i, buffer);
503 }
504
505 static void hdmi_write_eld_info(struct snd_info_entry *entry,
506 struct snd_info_buffer *buffer)
507 {
508 struct hdmi_eld *e = entry->private_data;
509 char line[64];
510 char name[64];
511 char *sname;
512 long long val;
513 unsigned int n;
514
515 while (!snd_info_get_line(buffer, line, sizeof(line))) {
516 if (sscanf(line, "%s %llx", name, &val) != 2)
517 continue;
518 /*
519 * We don't allow modification to these fields:
520 * monitor_name manufacture_id product_id
521 * eld_version edid_version
522 */
523 if (!strcmp(name, "monitor_present"))
524 e->monitor_present = val;
525 else if (!strcmp(name, "eld_valid"))
526 e->eld_valid = val;
527 else if (!strcmp(name, "connection_type"))
528 e->conn_type = val;
529 else if (!strcmp(name, "port_id"))
530 e->port_id = val;
531 else if (!strcmp(name, "support_hdcp"))
532 e->support_hdcp = val;
533 else if (!strcmp(name, "support_ai"))
534 e->support_ai = val;
535 else if (!strcmp(name, "audio_sync_delay"))
536 e->aud_synch_delay = val;
537 else if (!strcmp(name, "speakers"))
538 e->spk_alloc = val;
539 else if (!strcmp(name, "sad_count"))
540 e->sad_count = val;
541 else if (!strncmp(name, "sad", 3)) {
542 sname = name + 4;
543 n = name[3] - '0';
544 if (name[4] >= '0' && name[4] <= '9') {
545 sname++;
546 n = 10 * n + name[4] - '0';
547 }
548 if (n >= ELD_MAX_SAD)
549 continue;
550 if (!strcmp(sname, "_coding_type"))
551 e->sad[n].format = val;
552 else if (!strcmp(sname, "_channels"))
553 e->sad[n].channels = val;
554 else if (!strcmp(sname, "_rates"))
555 e->sad[n].rates = val;
556 else if (!strcmp(sname, "_bits"))
557 e->sad[n].sample_bits = val;
558 else if (!strcmp(sname, "_max_bitrate"))
559 e->sad[n].max_bitrate = val;
560 else if (!strcmp(sname, "_profile"))
561 e->sad[n].profile = val;
562 if (n >= e->sad_count)
563 e->sad_count = n + 1;
564 }
565 }
566 }
567
568
569 int snd_hda_eld_proc_new(struct hda_codec *codec, struct hdmi_eld *eld,
570 int index)
571 {
572 char name[32];
573 struct snd_info_entry *entry;
574 int err;
575
576 snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
577 err = snd_card_proc_new(codec->bus->card, name, &entry);
578 if (err < 0)
579 return err;
580
581 snd_info_set_text_ops(entry, eld, hdmi_print_eld_info);
582 entry->c.text.write = hdmi_write_eld_info;
583 entry->mode |= S_IWUSR;
584 eld->proc_entry = entry;
585
586 return 0;
587 }
588 EXPORT_SYMBOL_HDA(snd_hda_eld_proc_new);
589
590 void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
591 {
592 if (!codec->bus->shutdown && eld->proc_entry) {
593 snd_device_free(codec->bus->card, eld->proc_entry);
594 eld->proc_entry = NULL;
595 }
596 }
597 EXPORT_SYMBOL_HDA(snd_hda_eld_proc_free);
598
599 #endif /* CONFIG_PROC_FS */
Linux ARM platform port for MOXA ART SoC