Thomas Gleixner | da607e1 | 2019-05-29 16:57:59 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 2 | /* |
| 3 | * AM824 format in Audio and Music Data Transmission Protocol (IEC 61883-6) |
| 4 | * |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 5 | * Copyright (c) Clemens Ladisch <clemens@ladisch.de> |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 6 | * Copyright (c) 2015 Takashi Sakamoto <o-takashi@sakamocchi.jp> |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 7 | */ |
| 8 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 9 | #include <linux/slab.h> |
| 10 | |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 11 | #include "amdtp-am824.h" |
| 12 | |
| 13 | #define CIP_FMT_AM 0x10 |
| 14 | |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 15 | /* "Clock-based rate control mode" is just supported. */ |
| 16 | #define AMDTP_FDF_AM824 0x00 |
| 17 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 18 | /* |
| 19 | * Nominally 3125 bytes/second, but the MIDI port's clock might be |
| 20 | * 1% too slow, and the bus clock 100 ppm too fast. |
| 21 | */ |
| 22 | #define MIDI_BYTES_PER_SECOND 3093 |
| 23 | |
| 24 | /* |
| 25 | * Several devices look only at the first eight data blocks. |
| 26 | * In any case, this is more than enough for the MIDI data rate. |
| 27 | */ |
| 28 | #define MAX_MIDI_RX_BLOCKS 8 |
| 29 | |
| 30 | struct amdtp_am824 { |
| 31 | struct snd_rawmidi_substream *midi[AM824_MAX_CHANNELS_FOR_MIDI * 8]; |
| 32 | int midi_fifo_limit; |
| 33 | int midi_fifo_used[AM824_MAX_CHANNELS_FOR_MIDI * 8]; |
| 34 | unsigned int pcm_channels; |
| 35 | unsigned int midi_ports; |
| 36 | |
| 37 | u8 pcm_positions[AM824_MAX_CHANNELS_FOR_PCM]; |
| 38 | u8 midi_position; |
| 39 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 40 | unsigned int frame_multiplier; |
| 41 | }; |
| 42 | |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 43 | /** |
| 44 | * amdtp_am824_set_parameters - set stream parameters |
| 45 | * @s: the AMDTP stream to configure |
| 46 | * @rate: the sample rate |
| 47 | * @pcm_channels: the number of PCM samples in each data block, to be encoded |
| 48 | * as AM824 multi-bit linear audio |
| 49 | * @midi_ports: the number of MIDI ports (i.e., MPX-MIDI Data Channels) |
| 50 | * @double_pcm_frames: one data block transfers two PCM frames |
| 51 | * |
| 52 | * The parameters must be set before the stream is started, and must not be |
| 53 | * changed while the stream is running. |
| 54 | */ |
| 55 | int amdtp_am824_set_parameters(struct amdtp_stream *s, unsigned int rate, |
| 56 | unsigned int pcm_channels, |
| 57 | unsigned int midi_ports, |
| 58 | bool double_pcm_frames) |
| 59 | { |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 60 | struct amdtp_am824 *p = s->protocol; |
| 61 | unsigned int midi_channels; |
| 62 | unsigned int i; |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 63 | int err; |
| 64 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 65 | if (amdtp_stream_running(s)) |
| 66 | return -EINVAL; |
| 67 | |
| 68 | if (pcm_channels > AM824_MAX_CHANNELS_FOR_PCM) |
| 69 | return -EINVAL; |
| 70 | |
| 71 | midi_channels = DIV_ROUND_UP(midi_ports, 8); |
| 72 | if (midi_channels > AM824_MAX_CHANNELS_FOR_MIDI) |
| 73 | return -EINVAL; |
| 74 | |
| 75 | if (WARN_ON(amdtp_stream_running(s)) || |
| 76 | WARN_ON(pcm_channels > AM824_MAX_CHANNELS_FOR_PCM) || |
| 77 | WARN_ON(midi_channels > AM824_MAX_CHANNELS_FOR_MIDI)) |
| 78 | return -EINVAL; |
| 79 | |
| 80 | err = amdtp_stream_set_parameters(s, rate, |
| 81 | pcm_channels + midi_channels); |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 82 | if (err < 0) |
| 83 | return err; |
| 84 | |
Takashi Sakamoto | d3d10a4 | 2019-05-21 23:57:34 +0900 | [diff] [blame] | 85 | s->ctx_data.rx.fdf = AMDTP_FDF_AM824 | s->sfc; |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 86 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 87 | p->pcm_channels = pcm_channels; |
| 88 | p->midi_ports = midi_ports; |
| 89 | |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 90 | /* |
| 91 | * In IEC 61883-6, one data block represents one event. In ALSA, one |
| 92 | * event equals to one PCM frame. But Dice has a quirk at higher |
| 93 | * sampling rate to transfer two PCM frames in one data block. |
| 94 | */ |
| 95 | if (double_pcm_frames) |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 96 | p->frame_multiplier = 2; |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 97 | else |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 98 | p->frame_multiplier = 1; |
| 99 | |
| 100 | /* init the position map for PCM and MIDI channels */ |
| 101 | for (i = 0; i < pcm_channels; i++) |
| 102 | p->pcm_positions[i] = i; |
| 103 | p->midi_position = p->pcm_channels; |
| 104 | |
| 105 | /* |
| 106 | * We do not know the actual MIDI FIFO size of most devices. Just |
| 107 | * assume two bytes, i.e., one byte can be received over the bus while |
| 108 | * the previous one is transmitted over MIDI. |
| 109 | * (The value here is adjusted for midi_ratelimit_per_packet().) |
| 110 | */ |
| 111 | p->midi_fifo_limit = rate - MIDI_BYTES_PER_SECOND * s->syt_interval + 1; |
Takashi Sakamoto | 51c29fd | 2015-09-19 11:21:56 +0900 | [diff] [blame] | 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | EXPORT_SYMBOL_GPL(amdtp_am824_set_parameters); |
| 116 | |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 117 | /** |
Takashi Sakamoto | f65be91 | 2015-09-19 11:21:58 +0900 | [diff] [blame] | 118 | * amdtp_am824_set_pcm_position - set an index of data channel for a channel |
| 119 | * of PCM frame |
| 120 | * @s: the AMDTP stream |
| 121 | * @index: the index of data channel in an data block |
| 122 | * @position: the channel of PCM frame |
| 123 | */ |
| 124 | void amdtp_am824_set_pcm_position(struct amdtp_stream *s, unsigned int index, |
| 125 | unsigned int position) |
| 126 | { |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 127 | struct amdtp_am824 *p = s->protocol; |
| 128 | |
| 129 | if (index < p->pcm_channels) |
| 130 | p->pcm_positions[index] = position; |
Takashi Sakamoto | f65be91 | 2015-09-19 11:21:58 +0900 | [diff] [blame] | 131 | } |
| 132 | EXPORT_SYMBOL_GPL(amdtp_am824_set_pcm_position); |
| 133 | |
| 134 | /** |
| 135 | * amdtp_am824_set_midi_position - set a index of data channel for MIDI |
| 136 | * conformant data channel |
| 137 | * @s: the AMDTP stream |
| 138 | * @position: the index of data channel in an data block |
| 139 | */ |
| 140 | void amdtp_am824_set_midi_position(struct amdtp_stream *s, |
| 141 | unsigned int position) |
| 142 | { |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 143 | struct amdtp_am824 *p = s->protocol; |
| 144 | |
| 145 | p->midi_position = position; |
Takashi Sakamoto | f65be91 | 2015-09-19 11:21:58 +0900 | [diff] [blame] | 146 | } |
| 147 | EXPORT_SYMBOL_GPL(amdtp_am824_set_midi_position); |
| 148 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 149 | static void write_pcm_s32(struct amdtp_stream *s, |
| 150 | struct snd_pcm_substream *pcm, |
| 151 | __be32 *buffer, unsigned int frames) |
| 152 | { |
| 153 | struct amdtp_am824 *p = s->protocol; |
| 154 | struct snd_pcm_runtime *runtime = pcm->runtime; |
| 155 | unsigned int channels, remaining_frames, i, c; |
| 156 | const u32 *src; |
| 157 | |
| 158 | channels = p->pcm_channels; |
| 159 | src = (void *)runtime->dma_area + |
| 160 | frames_to_bytes(runtime, s->pcm_buffer_pointer); |
| 161 | remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer; |
| 162 | |
| 163 | for (i = 0; i < frames; ++i) { |
| 164 | for (c = 0; c < channels; ++c) { |
| 165 | buffer[p->pcm_positions[c]] = |
| 166 | cpu_to_be32((*src >> 8) | 0x40000000); |
| 167 | src++; |
| 168 | } |
| 169 | buffer += s->data_block_quadlets; |
| 170 | if (--remaining_frames == 0) |
| 171 | src = (void *)runtime->dma_area; |
| 172 | } |
| 173 | } |
| 174 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 175 | static void read_pcm_s32(struct amdtp_stream *s, |
| 176 | struct snd_pcm_substream *pcm, |
| 177 | __be32 *buffer, unsigned int frames) |
| 178 | { |
| 179 | struct amdtp_am824 *p = s->protocol; |
| 180 | struct snd_pcm_runtime *runtime = pcm->runtime; |
| 181 | unsigned int channels, remaining_frames, i, c; |
| 182 | u32 *dst; |
| 183 | |
| 184 | channels = p->pcm_channels; |
| 185 | dst = (void *)runtime->dma_area + |
| 186 | frames_to_bytes(runtime, s->pcm_buffer_pointer); |
| 187 | remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer; |
| 188 | |
| 189 | for (i = 0; i < frames; ++i) { |
| 190 | for (c = 0; c < channels; ++c) { |
| 191 | *dst = be32_to_cpu(buffer[p->pcm_positions[c]]) << 8; |
| 192 | dst++; |
| 193 | } |
| 194 | buffer += s->data_block_quadlets; |
| 195 | if (--remaining_frames == 0) |
| 196 | dst = (void *)runtime->dma_area; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | static void write_pcm_silence(struct amdtp_stream *s, |
| 201 | __be32 *buffer, unsigned int frames) |
| 202 | { |
| 203 | struct amdtp_am824 *p = s->protocol; |
| 204 | unsigned int i, c, channels = p->pcm_channels; |
| 205 | |
| 206 | for (i = 0; i < frames; ++i) { |
| 207 | for (c = 0; c < channels; ++c) |
| 208 | buffer[p->pcm_positions[c]] = cpu_to_be32(0x40000000); |
| 209 | buffer += s->data_block_quadlets; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | /** |
Takashi Sakamoto | bc8500d | 2015-09-19 11:21:57 +0900 | [diff] [blame] | 214 | * amdtp_am824_add_pcm_hw_constraints - add hw constraints for PCM substream |
| 215 | * @s: the AMDTP stream for AM824 data block, must be initialized. |
| 216 | * @runtime: the PCM substream runtime |
| 217 | * |
| 218 | */ |
| 219 | int amdtp_am824_add_pcm_hw_constraints(struct amdtp_stream *s, |
| 220 | struct snd_pcm_runtime *runtime) |
| 221 | { |
| 222 | int err; |
| 223 | |
| 224 | err = amdtp_stream_add_pcm_hw_constraints(s, runtime); |
| 225 | if (err < 0) |
| 226 | return err; |
| 227 | |
| 228 | /* AM824 in IEC 61883-6 can deliver 24bit data. */ |
| 229 | return snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24); |
| 230 | } |
| 231 | EXPORT_SYMBOL_GPL(amdtp_am824_add_pcm_hw_constraints); |
| 232 | |
| 233 | /** |
Takashi Sakamoto | 03e2a67 | 2015-09-19 11:21:59 +0900 | [diff] [blame] | 234 | * amdtp_am824_midi_trigger - start/stop playback/capture with a MIDI device |
| 235 | * @s: the AMDTP stream |
| 236 | * @port: index of MIDI port |
| 237 | * @midi: the MIDI device to be started, or %NULL to stop the current device |
| 238 | * |
| 239 | * Call this function on a running isochronous stream to enable the actual |
| 240 | * transmission of MIDI data. This function should be called from the MIDI |
| 241 | * device's .trigger callback. |
| 242 | */ |
| 243 | void amdtp_am824_midi_trigger(struct amdtp_stream *s, unsigned int port, |
| 244 | struct snd_rawmidi_substream *midi) |
| 245 | { |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 246 | struct amdtp_am824 *p = s->protocol; |
| 247 | |
| 248 | if (port < p->midi_ports) |
Mark Rutland | 6aa7de0 | 2017-10-23 14:07:29 -0700 | [diff] [blame] | 249 | WRITE_ONCE(p->midi[port], midi); |
Takashi Sakamoto | 03e2a67 | 2015-09-19 11:21:59 +0900 | [diff] [blame] | 250 | } |
| 251 | EXPORT_SYMBOL_GPL(amdtp_am824_midi_trigger); |
| 252 | |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 253 | /* |
| 254 | * To avoid sending MIDI bytes at too high a rate, assume that the receiving |
| 255 | * device has a FIFO, and track how much it is filled. This values increases |
| 256 | * by one whenever we send one byte in a packet, but the FIFO empties at |
| 257 | * a constant rate independent of our packet rate. One packet has syt_interval |
| 258 | * samples, so the number of bytes that empty out of the FIFO, per packet(!), |
| 259 | * is MIDI_BYTES_PER_SECOND * syt_interval / sample_rate. To avoid storing |
| 260 | * fractional values, the values in midi_fifo_used[] are measured in bytes |
| 261 | * multiplied by the sample rate. |
| 262 | */ |
| 263 | static bool midi_ratelimit_per_packet(struct amdtp_stream *s, unsigned int port) |
| 264 | { |
| 265 | struct amdtp_am824 *p = s->protocol; |
| 266 | int used; |
| 267 | |
| 268 | used = p->midi_fifo_used[port]; |
| 269 | if (used == 0) /* common shortcut */ |
| 270 | return true; |
| 271 | |
| 272 | used -= MIDI_BYTES_PER_SECOND * s->syt_interval; |
| 273 | used = max(used, 0); |
| 274 | p->midi_fifo_used[port] = used; |
| 275 | |
| 276 | return used < p->midi_fifo_limit; |
| 277 | } |
| 278 | |
| 279 | static void midi_rate_use_one_byte(struct amdtp_stream *s, unsigned int port) |
| 280 | { |
| 281 | struct amdtp_am824 *p = s->protocol; |
| 282 | |
| 283 | p->midi_fifo_used[port] += amdtp_rate_table[s->sfc]; |
| 284 | } |
| 285 | |
| 286 | static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer, |
| 287 | unsigned int frames) |
| 288 | { |
| 289 | struct amdtp_am824 *p = s->protocol; |
| 290 | unsigned int f, port; |
| 291 | u8 *b; |
| 292 | |
| 293 | for (f = 0; f < frames; f++) { |
| 294 | b = (u8 *)&buffer[p->midi_position]; |
| 295 | |
| 296 | port = (s->data_block_counter + f) % 8; |
| 297 | if (f < MAX_MIDI_RX_BLOCKS && |
| 298 | midi_ratelimit_per_packet(s, port) && |
| 299 | p->midi[port] != NULL && |
| 300 | snd_rawmidi_transmit(p->midi[port], &b[1], 1) == 1) { |
| 301 | midi_rate_use_one_byte(s, port); |
| 302 | b[0] = 0x81; |
| 303 | } else { |
| 304 | b[0] = 0x80; |
| 305 | b[1] = 0; |
| 306 | } |
| 307 | b[2] = 0; |
| 308 | b[3] = 0; |
| 309 | |
| 310 | buffer += s->data_block_quadlets; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | static void read_midi_messages(struct amdtp_stream *s, |
| 315 | __be32 *buffer, unsigned int frames) |
| 316 | { |
| 317 | struct amdtp_am824 *p = s->protocol; |
| 318 | unsigned int f, port; |
| 319 | int len; |
| 320 | u8 *b; |
| 321 | |
| 322 | for (f = 0; f < frames; f++) { |
Takashi Iwai | b5c21c8 | 2019-07-01 17:01:00 +0200 | [diff] [blame] | 323 | port = (8 - s->ctx_data.tx.first_dbc + s->data_block_counter + f) % 8; |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 324 | b = (u8 *)&buffer[p->midi_position]; |
| 325 | |
| 326 | len = b[0] - 0x80; |
| 327 | if ((1 <= len) && (len <= 3) && (p->midi[port])) |
| 328 | snd_rawmidi_receive(p->midi[port], b + 1, len); |
| 329 | |
| 330 | buffer += s->data_block_quadlets; |
| 331 | } |
| 332 | } |
| 333 | |
kbuild test robot | 02e6ef9 | 2015-09-29 22:46:10 +0800 | [diff] [blame] | 334 | static unsigned int process_rx_data_blocks(struct amdtp_stream *s, __be32 *buffer, |
| 335 | unsigned int data_blocks, unsigned int *syt) |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 336 | { |
| 337 | struct amdtp_am824 *p = s->protocol; |
Mark Rutland | 6aa7de0 | 2017-10-23 14:07:29 -0700 | [diff] [blame] | 338 | struct snd_pcm_substream *pcm = READ_ONCE(s->pcm); |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 339 | unsigned int pcm_frames; |
| 340 | |
| 341 | if (pcm) { |
Takashi Sakamoto | a02cb8f | 2017-05-22 22:22:21 +0900 | [diff] [blame] | 342 | write_pcm_s32(s, pcm, buffer, data_blocks); |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 343 | pcm_frames = data_blocks * p->frame_multiplier; |
| 344 | } else { |
| 345 | write_pcm_silence(s, buffer, data_blocks); |
| 346 | pcm_frames = 0; |
| 347 | } |
| 348 | |
| 349 | if (p->midi_ports) |
| 350 | write_midi_messages(s, buffer, data_blocks); |
| 351 | |
| 352 | return pcm_frames; |
| 353 | } |
| 354 | |
kbuild test robot | 02e6ef9 | 2015-09-29 22:46:10 +0800 | [diff] [blame] | 355 | static unsigned int process_tx_data_blocks(struct amdtp_stream *s, __be32 *buffer, |
| 356 | unsigned int data_blocks, unsigned int *syt) |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 357 | { |
| 358 | struct amdtp_am824 *p = s->protocol; |
Mark Rutland | 6aa7de0 | 2017-10-23 14:07:29 -0700 | [diff] [blame] | 359 | struct snd_pcm_substream *pcm = READ_ONCE(s->pcm); |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 360 | unsigned int pcm_frames; |
| 361 | |
| 362 | if (pcm) { |
Takashi Sakamoto | a02cb8f | 2017-05-22 22:22:21 +0900 | [diff] [blame] | 363 | read_pcm_s32(s, pcm, buffer, data_blocks); |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 364 | pcm_frames = data_blocks * p->frame_multiplier; |
| 365 | } else { |
| 366 | pcm_frames = 0; |
| 367 | } |
| 368 | |
| 369 | if (p->midi_ports) |
| 370 | read_midi_messages(s, buffer, data_blocks); |
| 371 | |
| 372 | return pcm_frames; |
| 373 | } |
| 374 | |
Takashi Sakamoto | 03e2a67 | 2015-09-19 11:21:59 +0900 | [diff] [blame] | 375 | /** |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 376 | * amdtp_am824_init - initialize an AMDTP stream structure to handle AM824 |
| 377 | * data block |
| 378 | * @s: the AMDTP stream to initialize |
| 379 | * @unit: the target of the stream |
| 380 | * @dir: the direction of stream |
| 381 | * @flags: the packet transmission method to use |
| 382 | */ |
| 383 | int amdtp_am824_init(struct amdtp_stream *s, struct fw_unit *unit, |
| 384 | enum amdtp_stream_direction dir, enum cip_flags flags) |
| 385 | { |
Takashi Sakamoto | df075fe | 2015-09-19 11:22:02 +0900 | [diff] [blame] | 386 | amdtp_stream_process_data_blocks_t process_data_blocks; |
| 387 | |
| 388 | if (dir == AMDTP_IN_STREAM) |
| 389 | process_data_blocks = process_tx_data_blocks; |
| 390 | else |
| 391 | process_data_blocks = process_rx_data_blocks; |
| 392 | |
| 393 | return amdtp_stream_init(s, unit, dir, flags, CIP_FMT_AM, |
| 394 | process_data_blocks, |
| 395 | sizeof(struct amdtp_am824)); |
Takashi Sakamoto | 5955815 | 2015-09-19 11:21:55 +0900 | [diff] [blame] | 396 | } |
| 397 | EXPORT_SYMBOL_GPL(amdtp_am824_init); |