Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * BRIEF MODULE DESCRIPTION |
| 3 | * Driver for AMD Au1000 MIPS Processor, AC'97 Sound Port |
| 4 | * |
| 5 | * Copyright 2004 Cooper Street Innovations Inc. |
| 6 | * Author: Charles Eidsness <charles@cooper-street.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 14 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 15 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 16 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 19 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 20 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License along |
| 25 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 26 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 27 | * |
| 28 | * History: |
| 29 | * |
| 30 | * 2004-09-09 Charles Eidsness -- Original verion -- based on |
| 31 | * sa11xx-uda1341.c ALSA driver and the |
| 32 | * au1000.c OSS driver. |
| 33 | * 2004-09-09 Matt Porter -- Added support for ALSA 1.0.6 |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | #include <linux/ioport.h> |
| 38 | #include <linux/interrupt.h> |
| 39 | #include <sound/driver.h> |
| 40 | #include <linux/init.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <linux/version.h> |
| 43 | #include <sound/core.h> |
| 44 | #include <sound/initval.h> |
| 45 | #include <sound/pcm.h> |
| 46 | #include <sound/ac97_codec.h> |
| 47 | #include <asm/mach-au1x00/au1000.h> |
| 48 | #include <asm/mach-au1x00/au1000_dma.h> |
| 49 | |
| 50 | MODULE_AUTHOR("Charles Eidsness <charles@cooper-street.com>"); |
| 51 | MODULE_DESCRIPTION("Au1000 AC'97 ALSA Driver"); |
| 52 | MODULE_LICENSE("GPL"); |
| 53 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8) |
| 54 | MODULE_SUPPORTED_DEVICE("{{AMD,Au1000 AC'97}}"); |
| 55 | #else |
| 56 | MODULE_CLASSES("{sound}"); |
| 57 | MODULE_DEVICES("{{AMD,Au1000 AC'97}}"); |
| 58 | #endif |
| 59 | |
| 60 | #define chip_t au1000_t |
| 61 | |
| 62 | #define PLAYBACK 0 |
| 63 | #define CAPTURE 1 |
| 64 | #define AC97_SLOT_3 0x01 |
| 65 | #define AC97_SLOT_4 0x02 |
| 66 | #define AC97_SLOT_6 0x08 |
| 67 | #define AC97_CMD_IRQ 31 |
| 68 | #define READ 0 |
| 69 | #define WRITE 1 |
| 70 | #define READ_WAIT 2 |
| 71 | #define RW_DONE 3 |
| 72 | |
| 73 | DECLARE_WAIT_QUEUE_HEAD(ac97_command_wq); |
| 74 | |
| 75 | typedef struct au1000_period au1000_period_t; |
| 76 | struct au1000_period |
| 77 | { |
| 78 | u32 start; |
| 79 | u32 relative_end; /*realtive to start of buffer*/ |
| 80 | au1000_period_t * next; |
| 81 | }; |
| 82 | |
| 83 | /*Au1000 AC97 Port Control Reisters*/ |
| 84 | typedef struct au1000_ac97_reg au1000_ac97_reg_t; |
| 85 | struct au1000_ac97_reg { |
| 86 | u32 volatile config; |
| 87 | u32 volatile status; |
| 88 | u32 volatile data; |
| 89 | u32 volatile cmd; |
| 90 | u32 volatile cntrl; |
| 91 | }; |
| 92 | |
| 93 | typedef struct audio_stream audio_stream_t; |
| 94 | struct audio_stream { |
| 95 | snd_pcm_substream_t * substream; |
| 96 | int dma; |
| 97 | spinlock_t dma_lock; |
| 98 | au1000_period_t * buffer; |
| 99 | unsigned long period_size; |
| 100 | }; |
| 101 | |
| 102 | typedef struct snd_card_au1000 { |
| 103 | snd_card_t *card; |
| 104 | au1000_ac97_reg_t volatile *ac97_ioport; |
| 105 | |
| 106 | struct resource *ac97_res_port; |
| 107 | spinlock_t ac97_lock; |
| 108 | ac97_t *ac97; |
| 109 | |
| 110 | snd_pcm_t *pcm; |
| 111 | audio_stream_t *stream[2]; /* playback & capture */ |
| 112 | } au1000_t; |
| 113 | |
| 114 | static au1000_t *au1000 = NULL; |
| 115 | |
| 116 | /*--------------------------- Local Functions --------------------------------*/ |
| 117 | static void |
| 118 | au1000_set_ac97_xmit_slots(long xmit_slots) |
| 119 | { |
| 120 | u32 volatile ac97_config; |
| 121 | |
| 122 | spin_lock(&au1000->ac97_lock); |
| 123 | ac97_config = au1000->ac97_ioport->config; |
| 124 | ac97_config = ac97_config & ~AC97C_XMIT_SLOTS_MASK; |
| 125 | ac97_config |= (xmit_slots << AC97C_XMIT_SLOTS_BIT); |
| 126 | au1000->ac97_ioport->config = ac97_config; |
| 127 | spin_unlock(&au1000->ac97_lock); |
| 128 | } |
| 129 | |
| 130 | static void |
| 131 | au1000_set_ac97_recv_slots(long recv_slots) |
| 132 | { |
| 133 | u32 volatile ac97_config; |
| 134 | |
| 135 | spin_lock(&au1000->ac97_lock); |
| 136 | ac97_config = au1000->ac97_ioport->config; |
| 137 | ac97_config = ac97_config & ~AC97C_RECV_SLOTS_MASK; |
| 138 | ac97_config |= (recv_slots << AC97C_RECV_SLOTS_BIT); |
| 139 | au1000->ac97_ioport->config = ac97_config; |
| 140 | spin_unlock(&au1000->ac97_lock); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | static void |
| 145 | au1000_dma_stop(audio_stream_t *stream) |
| 146 | { |
| 147 | unsigned long flags; |
| 148 | au1000_period_t * pointer; |
| 149 | au1000_period_t * pointer_next; |
| 150 | |
| 151 | if (stream->buffer != NULL) { |
| 152 | spin_lock_irqsave(&stream->dma_lock, flags); |
| 153 | disable_dma(stream->dma); |
| 154 | spin_unlock_irqrestore(&stream->dma_lock, flags); |
| 155 | |
| 156 | pointer = stream->buffer; |
| 157 | pointer_next = stream->buffer->next; |
| 158 | |
| 159 | do { |
| 160 | kfree(pointer); |
| 161 | pointer = pointer_next; |
| 162 | pointer_next = pointer->next; |
| 163 | } while (pointer != stream->buffer); |
| 164 | |
| 165 | stream->buffer = NULL; |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | static void |
| 170 | au1000_dma_start(audio_stream_t *stream) |
| 171 | { |
| 172 | snd_pcm_substream_t *substream = stream->substream; |
| 173 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 174 | |
| 175 | unsigned long flags, dma_start; |
| 176 | int i; |
| 177 | au1000_period_t * pointer; |
| 178 | |
| 179 | if (stream->buffer == NULL) { |
| 180 | dma_start = virt_to_phys(runtime->dma_area); |
| 181 | |
| 182 | stream->period_size = frames_to_bytes(runtime, |
| 183 | runtime->period_size); |
| 184 | stream->buffer = kmalloc(sizeof(au1000_period_t), GFP_KERNEL); |
| 185 | pointer = stream->buffer; |
| 186 | for (i = 0 ; i < runtime->periods ; i++) { |
| 187 | pointer->start = (u32)(dma_start + |
| 188 | (i * stream->period_size)); |
| 189 | pointer->relative_end = (u32) |
| 190 | (((i+1) * stream->period_size) - 0x1); |
| 191 | if ( i < runtime->periods - 1) { |
| 192 | pointer->next = kmalloc(sizeof(au1000_period_t) |
| 193 | , GFP_KERNEL); |
| 194 | pointer = pointer->next; |
| 195 | } |
| 196 | } |
| 197 | pointer->next = stream->buffer; |
| 198 | |
| 199 | spin_lock_irqsave(&stream->dma_lock, flags); |
| 200 | init_dma(stream->dma); |
| 201 | if (get_dma_active_buffer(stream->dma) == 0) { |
| 202 | clear_dma_done0(stream->dma); |
| 203 | set_dma_addr0(stream->dma, stream->buffer->start); |
| 204 | set_dma_count0(stream->dma, stream->period_size >> 1); |
| 205 | set_dma_addr1(stream->dma, stream->buffer->next->start); |
| 206 | set_dma_count1(stream->dma, stream->period_size >> 1); |
| 207 | } else { |
| 208 | clear_dma_done1(stream->dma); |
| 209 | set_dma_addr1(stream->dma, stream->buffer->start); |
| 210 | set_dma_count1(stream->dma, stream->period_size >> 1); |
| 211 | set_dma_addr0(stream->dma, stream->buffer->next->start); |
| 212 | set_dma_count0(stream->dma, stream->period_size >> 1); |
| 213 | } |
| 214 | enable_dma_buffers(stream->dma); |
| 215 | start_dma(stream->dma); |
| 216 | spin_unlock_irqrestore(&stream->dma_lock, flags); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | static irqreturn_t |
| 221 | au1000_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 222 | { |
| 223 | audio_stream_t *stream = (audio_stream_t *) dev_id; |
| 224 | snd_pcm_substream_t *substream = stream->substream; |
| 225 | |
| 226 | spin_lock(&stream->dma_lock); |
| 227 | switch (get_dma_buffer_done(stream->dma)) { |
| 228 | case DMA_D0: |
| 229 | stream->buffer = stream->buffer->next; |
| 230 | clear_dma_done0(stream->dma); |
| 231 | set_dma_addr0(stream->dma, stream->buffer->next->start); |
| 232 | set_dma_count0(stream->dma, stream->period_size >> 1); |
| 233 | enable_dma_buffer0(stream->dma); |
| 234 | break; |
| 235 | case DMA_D1: |
| 236 | stream->buffer = stream->buffer->next; |
| 237 | clear_dma_done1(stream->dma); |
| 238 | set_dma_addr1(stream->dma, stream->buffer->next->start); |
| 239 | set_dma_count1(stream->dma, stream->period_size >> 1); |
| 240 | enable_dma_buffer1(stream->dma); |
| 241 | break; |
| 242 | case (DMA_D0 | DMA_D1): |
| 243 | spin_unlock(&stream->dma_lock); |
| 244 | printk(KERN_ERR "DMA %d missed interrupt.\n",stream->dma); |
| 245 | au1000_dma_stop(stream); |
| 246 | au1000_dma_start(stream); |
| 247 | spin_lock(&stream->dma_lock); |
| 248 | break; |
| 249 | case (~DMA_D0 & ~DMA_D1): |
| 250 | printk(KERN_ERR "DMA %d empty irq.\n",stream->dma); |
| 251 | } |
| 252 | spin_unlock(&stream->dma_lock); |
| 253 | snd_pcm_period_elapsed(substream); |
| 254 | return IRQ_HANDLED; |
| 255 | } |
| 256 | |
| 257 | /*-------------------------- PCM Audio Streams -------------------------------*/ |
| 258 | |
| 259 | static unsigned int rates[] = {8000, 11025, 16000, 22050}; |
| 260 | static snd_pcm_hw_constraint_list_t hw_constraints_rates = { |
| 261 | .count = sizeof(rates) / sizeof(rates[0]), |
| 262 | .list = rates, |
| 263 | .mask = 0, |
| 264 | }; |
| 265 | |
| 266 | static snd_pcm_hardware_t snd_au1000 = |
| 267 | { |
| 268 | .info = (SNDRV_PCM_INFO_INTERLEAVED | \ |
| 269 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID), |
| 270 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 271 | .rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | |
| 272 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050), |
| 273 | .rate_min = 8000, |
| 274 | .rate_max = 22050, |
| 275 | .channels_min = 1, |
| 276 | .channels_max = 2, |
| 277 | .buffer_bytes_max = 128*1024, |
| 278 | .period_bytes_min = 32, |
| 279 | .period_bytes_max = 16*1024, |
| 280 | .periods_min = 8, |
| 281 | .periods_max = 255, |
| 282 | .fifo_size = 16, |
| 283 | }; |
| 284 | |
| 285 | static int |
| 286 | snd_au1000_playback_open(snd_pcm_substream_t * substream) |
| 287 | { |
| 288 | au1000->stream[PLAYBACK]->substream = substream; |
| 289 | au1000->stream[PLAYBACK]->buffer = NULL; |
| 290 | substream->private_data = au1000->stream[PLAYBACK]; |
| 291 | substream->runtime->hw = snd_au1000; |
| 292 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
| 293 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); |
| 294 | } |
| 295 | |
| 296 | static int |
| 297 | snd_au1000_capture_open(snd_pcm_substream_t * substream) |
| 298 | { |
| 299 | au1000->stream[CAPTURE]->substream = substream; |
| 300 | au1000->stream[CAPTURE]->buffer = NULL; |
| 301 | substream->private_data = au1000->stream[CAPTURE]; |
| 302 | substream->runtime->hw = snd_au1000; |
| 303 | return (snd_pcm_hw_constraint_list(substream->runtime, 0, |
| 304 | SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates) < 0); |
| 305 | |
| 306 | } |
| 307 | |
| 308 | static int |
| 309 | snd_au1000_playback_close(snd_pcm_substream_t * substream) |
| 310 | { |
| 311 | au1000->stream[PLAYBACK]->substream = NULL; |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | static int |
| 316 | snd_au1000_capture_close(snd_pcm_substream_t * substream) |
| 317 | { |
| 318 | au1000->stream[CAPTURE]->substream = NULL; |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static int |
| 323 | snd_au1000_hw_params(snd_pcm_substream_t * substream, |
| 324 | snd_pcm_hw_params_t * hw_params) |
| 325 | { |
| 326 | return snd_pcm_lib_malloc_pages(substream, |
| 327 | params_buffer_bytes(hw_params)); |
| 328 | } |
| 329 | |
| 330 | static int |
| 331 | snd_au1000_hw_free(snd_pcm_substream_t * substream) |
| 332 | { |
| 333 | return snd_pcm_lib_free_pages(substream); |
| 334 | } |
| 335 | |
| 336 | static int |
| 337 | snd_au1000_playback_prepare(snd_pcm_substream_t * substream) |
| 338 | { |
| 339 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 340 | |
| 341 | if (runtime->channels == 1 ) |
| 342 | au1000_set_ac97_xmit_slots(AC97_SLOT_4); |
| 343 | else |
| 344 | au1000_set_ac97_xmit_slots(AC97_SLOT_3 | AC97_SLOT_4); |
| 345 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate); |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static int |
| 350 | snd_au1000_capture_prepare(snd_pcm_substream_t * substream) |
| 351 | { |
| 352 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 353 | |
| 354 | if (runtime->channels == 1 ) |
| 355 | au1000_set_ac97_recv_slots(AC97_SLOT_4); |
| 356 | else |
| 357 | au1000_set_ac97_recv_slots(AC97_SLOT_3 | AC97_SLOT_4); |
| 358 | snd_ac97_set_rate(au1000->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | static int |
| 363 | snd_au1000_trigger(snd_pcm_substream_t * substream, int cmd) |
| 364 | { |
| 365 | audio_stream_t *stream = substream->private_data; |
| 366 | int err = 0; |
| 367 | |
| 368 | switch (cmd) { |
| 369 | case SNDRV_PCM_TRIGGER_START: |
| 370 | au1000_dma_start(stream); |
| 371 | break; |
| 372 | case SNDRV_PCM_TRIGGER_STOP: |
| 373 | au1000_dma_stop(stream); |
| 374 | break; |
| 375 | default: |
| 376 | err = -EINVAL; |
| 377 | break; |
| 378 | } |
| 379 | return err; |
| 380 | } |
| 381 | |
| 382 | static snd_pcm_uframes_t |
| 383 | snd_au1000_pointer(snd_pcm_substream_t * substream) |
| 384 | { |
| 385 | audio_stream_t *stream = substream->private_data; |
| 386 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 387 | unsigned long flags; |
| 388 | long location; |
| 389 | |
| 390 | spin_lock_irqsave(&stream->dma_lock, flags); |
| 391 | location = get_dma_residue(stream->dma); |
| 392 | spin_unlock_irqrestore(&stream->dma_lock, flags); |
| 393 | location = stream->buffer->relative_end - location; |
| 394 | if (location == -1) |
| 395 | location = 0; |
| 396 | return bytes_to_frames(runtime,location); |
| 397 | } |
| 398 | |
| 399 | static snd_pcm_ops_t snd_card_au1000_playback_ops = { |
| 400 | .open = snd_au1000_playback_open, |
| 401 | .close = snd_au1000_playback_close, |
| 402 | .ioctl = snd_pcm_lib_ioctl, |
| 403 | .hw_params = snd_au1000_hw_params, |
| 404 | .hw_free = snd_au1000_hw_free, |
| 405 | .prepare = snd_au1000_playback_prepare, |
| 406 | .trigger = snd_au1000_trigger, |
| 407 | .pointer = snd_au1000_pointer, |
| 408 | }; |
| 409 | |
| 410 | static snd_pcm_ops_t snd_card_au1000_capture_ops = { |
| 411 | .open = snd_au1000_capture_open, |
| 412 | .close = snd_au1000_capture_close, |
| 413 | .ioctl = snd_pcm_lib_ioctl, |
| 414 | .hw_params = snd_au1000_hw_params, |
| 415 | .hw_free = snd_au1000_hw_free, |
| 416 | .prepare = snd_au1000_capture_prepare, |
| 417 | .trigger = snd_au1000_trigger, |
| 418 | .pointer = snd_au1000_pointer, |
| 419 | }; |
| 420 | |
| 421 | static int __devinit |
| 422 | snd_au1000_pcm_new(void) |
| 423 | { |
| 424 | snd_pcm_t *pcm; |
| 425 | int err; |
| 426 | unsigned long flags; |
| 427 | |
| 428 | if ((err = snd_pcm_new(au1000->card, "AU1000 AC97 PCM", 0, 1, 1, &pcm)) < 0) |
| 429 | return err; |
| 430 | |
| 431 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, |
| 432 | snd_dma_continuous_data(GFP_KERNEL), 128*1024, 128*1024); |
| 433 | |
| 434 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
| 435 | &snd_card_au1000_playback_ops); |
| 436 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
| 437 | &snd_card_au1000_capture_ops); |
| 438 | |
| 439 | pcm->private_data = au1000; |
| 440 | pcm->info_flags = 0; |
| 441 | strcpy(pcm->name, "Au1000 AC97 PCM"); |
| 442 | |
| 443 | flags = claim_dma_lock(); |
| 444 | if ((au1000->stream[PLAYBACK]->dma = request_au1000_dma(DMA_ID_AC97C_TX, |
| 445 | "AC97 TX", au1000_dma_interrupt, SA_INTERRUPT, |
| 446 | au1000->stream[PLAYBACK])) < 0) { |
| 447 | release_dma_lock(flags); |
| 448 | return -EBUSY; |
| 449 | } |
| 450 | if ((au1000->stream[CAPTURE]->dma = request_au1000_dma(DMA_ID_AC97C_RX, |
| 451 | "AC97 RX", au1000_dma_interrupt, SA_INTERRUPT, |
| 452 | au1000->stream[CAPTURE])) < 0){ |
| 453 | release_dma_lock(flags); |
| 454 | return -EBUSY; |
| 455 | } |
| 456 | /* enable DMA coherency in read/write DMA channels */ |
| 457 | set_dma_mode(au1000->stream[PLAYBACK]->dma, |
| 458 | get_dma_mode(au1000->stream[PLAYBACK]->dma) & ~DMA_NC); |
| 459 | set_dma_mode(au1000->stream[CAPTURE]->dma, |
| 460 | get_dma_mode(au1000->stream[CAPTURE]->dma) & ~DMA_NC); |
| 461 | release_dma_lock(flags); |
| 462 | spin_lock_init(&au1000->stream[PLAYBACK]->dma_lock); |
| 463 | spin_lock_init(&au1000->stream[CAPTURE]->dma_lock); |
| 464 | au1000->pcm = pcm; |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | |
| 469 | /*-------------------------- AC97 CODEC Control ------------------------------*/ |
| 470 | |
| 471 | static unsigned short |
| 472 | snd_au1000_ac97_read(ac97_t *ac97, unsigned short reg) |
| 473 | { |
| 474 | u32 volatile cmd; |
| 475 | u16 volatile data; |
| 476 | int i; |
| 477 | spin_lock(au1000->ac97_lock); |
| 478 | /* would rather use the interupt than this polling but it works and I can't |
| 479 | get the interupt driven case to work efficiently */ |
| 480 | for (i = 0; i < 0x5000; i++) |
| 481 | if (!(au1000->ac97_ioport->status & AC97C_CP)) |
| 482 | break; |
| 483 | if (i == 0x5000) |
| 484 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); |
| 485 | |
| 486 | cmd = (u32) reg & AC97C_INDEX_MASK; |
| 487 | cmd |= AC97C_READ; |
| 488 | au1000->ac97_ioport->cmd = cmd; |
| 489 | |
| 490 | /* now wait for the data */ |
| 491 | for (i = 0; i < 0x5000; i++) |
| 492 | if (!(au1000->ac97_ioport->status & AC97C_CP)) |
| 493 | break; |
| 494 | if (i == 0x5000) { |
| 495 | printk(KERN_ERR "au1000 AC97: AC97 command read timeout\n"); |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | data = au1000->ac97_ioport->cmd & 0xffff; |
| 500 | spin_unlock(au1000->ac97_lock); |
| 501 | |
| 502 | return data; |
| 503 | |
| 504 | } |
| 505 | |
| 506 | |
| 507 | static void |
| 508 | snd_au1000_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val) |
| 509 | { |
| 510 | u32 cmd; |
| 511 | int i; |
| 512 | spin_lock(au1000->ac97_lock); |
| 513 | /* would rather use the interupt than this polling but it works and I can't |
| 514 | get the interupt driven case to work efficiently */ |
| 515 | for (i = 0; i < 0x5000; i++) |
| 516 | if (!(au1000->ac97_ioport->status & AC97C_CP)) |
| 517 | break; |
| 518 | if (i == 0x5000) |
| 519 | printk(KERN_ERR "au1000 AC97: AC97 command write timeout\n"); |
| 520 | |
| 521 | cmd = (u32) reg & AC97C_INDEX_MASK; |
| 522 | cmd &= ~AC97C_READ; |
| 523 | cmd |= ((u32) val << AC97C_WD_BIT); |
| 524 | au1000->ac97_ioport->cmd = cmd; |
| 525 | spin_unlock(au1000->ac97_lock); |
| 526 | } |
| 527 | static void |
| 528 | snd_au1000_ac97_free(ac97_t *ac97) |
| 529 | { |
| 530 | au1000->ac97 = NULL; |
| 531 | } |
| 532 | |
| 533 | static int __devinit |
| 534 | snd_au1000_ac97_new(void) |
| 535 | { |
| 536 | int err; |
| 537 | |
| 538 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8) |
| 539 | ac97_bus_t *pbus; |
| 540 | ac97_template_t ac97; |
| 541 | static ac97_bus_ops_t ops = { |
| 542 | .write = snd_au1000_ac97_write, |
| 543 | .read = snd_au1000_ac97_read, |
| 544 | }; |
| 545 | #else |
| 546 | ac97_bus_t bus, *pbus; |
| 547 | ac97_t ac97; |
| 548 | #endif |
| 549 | |
| 550 | if ((au1000->ac97_res_port = request_region(AC97C_CONFIG, |
| 551 | sizeof(au1000_ac97_reg_t), "Au1x00 AC97")) == NULL) { |
| 552 | snd_printk(KERN_ERR "ALSA AC97: can't grap AC97 port\n"); |
| 553 | return -EBUSY; |
| 554 | } |
| 555 | au1000->ac97_ioport = (au1000_ac97_reg_t *) au1000->ac97_res_port->start; |
| 556 | |
| 557 | spin_lock_init(&au1000->ac97_lock); |
| 558 | |
| 559 | spin_lock(&au1000->ac97_lock); |
| 560 | |
| 561 | /* configure pins for AC'97 |
| 562 | TODO: move to board_setup.c */ |
| 563 | au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC); |
| 564 | |
| 565 | /* Initialise Au1000's AC'97 Control Block */ |
| 566 | au1000->ac97_ioport->cntrl = AC97C_RS | AC97C_CE; |
| 567 | udelay(10); |
| 568 | au1000->ac97_ioport->cntrl = AC97C_CE; |
| 569 | udelay(10); |
| 570 | |
| 571 | /* Initialise External CODEC -- cold reset */ |
| 572 | au1000->ac97_ioport->config = AC97C_RESET; |
| 573 | udelay(10); |
| 574 | au1000->ac97_ioport->config = 0x0; |
| 575 | mdelay(5); |
| 576 | |
| 577 | spin_unlock(&au1000->ac97_lock); |
| 578 | |
| 579 | /* Initialise AC97 middle-layer */ |
| 580 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,8) |
| 581 | if ((err = snd_ac97_bus(au1000->card, 0, &ops, au1000, &pbus)) < 0) |
| 582 | return err; |
| 583 | #else |
| 584 | memset(&bus, 0, sizeof(bus)); |
| 585 | bus.write = snd_au1000_ac97_write; |
| 586 | bus.read = snd_au1000_ac97_read; |
| 587 | if ((err = snd_ac97_bus(au1000->card, &bus, &pbus)) < 0) |
| 588 | return err; |
| 589 | #endif |
| 590 | memset(&ac97, 0, sizeof(ac97)); |
| 591 | ac97.private_data = au1000; |
| 592 | ac97.private_free = snd_au1000_ac97_free; |
| 593 | if ((err = snd_ac97_mixer(pbus, &ac97, &au1000->ac97)) < 0) |
| 594 | return err; |
| 595 | return 0; |
| 596 | |
| 597 | } |
| 598 | |
| 599 | /*------------------------------ Setup / Destroy ----------------------------*/ |
| 600 | |
| 601 | void |
| 602 | snd_au1000_free(snd_card_t *card) |
| 603 | { |
| 604 | |
| 605 | if (au1000->ac97_res_port) { |
| 606 | /* put internal AC97 block into reset */ |
| 607 | au1000->ac97_ioport->cntrl = AC97C_RS; |
| 608 | au1000->ac97_ioport = NULL; |
Takashi Iwai | b1d5776 | 2005-10-10 11:56:31 +0200 | [diff] [blame^] | 609 | release_and_free_resource(au1000->ac97_res_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | if (au1000->stream[PLAYBACK]->dma >= 0) |
| 613 | free_au1000_dma(au1000->stream[PLAYBACK]->dma); |
| 614 | |
| 615 | if (au1000->stream[CAPTURE]->dma >= 0) |
| 616 | free_au1000_dma(au1000->stream[CAPTURE]->dma); |
| 617 | |
| 618 | kfree(au1000->stream[PLAYBACK]); |
| 619 | au1000->stream[PLAYBACK] = NULL; |
| 620 | kfree(au1000->stream[CAPTURE]); |
| 621 | au1000->stream[CAPTURE] = NULL; |
| 622 | kfree(au1000); |
| 623 | au1000 = NULL; |
| 624 | |
| 625 | } |
| 626 | |
| 627 | static int __init |
| 628 | au1000_init(void) |
| 629 | { |
| 630 | int err; |
| 631 | |
| 632 | au1000 = kmalloc(sizeof(au1000_t), GFP_KERNEL); |
| 633 | if (au1000 == NULL) |
| 634 | return -ENOMEM; |
| 635 | au1000->stream[PLAYBACK] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL); |
| 636 | if (au1000->stream[PLAYBACK] == NULL) |
| 637 | return -ENOMEM; |
| 638 | au1000->stream[CAPTURE] = kmalloc(sizeof(audio_stream_t), GFP_KERNEL); |
| 639 | if (au1000->stream[CAPTURE] == NULL) |
| 640 | return -ENOMEM; |
| 641 | /* so that snd_au1000_free will work as intended */ |
| 642 | au1000->stream[PLAYBACK]->dma = -1; |
| 643 | au1000->stream[CAPTURE]->dma = -1; |
| 644 | au1000->ac97_res_port = NULL; |
| 645 | |
| 646 | au1000->card = snd_card_new(-1, "AC97", THIS_MODULE, sizeof(au1000_t)); |
| 647 | if (au1000->card == NULL) { |
| 648 | snd_au1000_free(au1000->card); |
| 649 | return -ENOMEM; |
| 650 | } |
| 651 | |
| 652 | au1000->card->private_data = (au1000_t *)au1000; |
| 653 | au1000->card->private_free = snd_au1000_free; |
| 654 | |
| 655 | if ((err = snd_au1000_ac97_new()) < 0 ) { |
| 656 | snd_card_free(au1000->card); |
| 657 | return err; |
| 658 | } |
| 659 | |
| 660 | if ((err = snd_au1000_pcm_new()) < 0) { |
| 661 | snd_card_free(au1000->card); |
| 662 | return err; |
| 663 | } |
| 664 | |
| 665 | strcpy(au1000->card->driver, "AMD-Au1000-AC97"); |
| 666 | strcpy(au1000->card->shortname, "Au1000-AC97"); |
| 667 | sprintf(au1000->card->longname, "AMD Au1000--AC97 ALSA Driver"); |
| 668 | |
Takashi Iwai | 16dab54 | 2005-09-05 17:17:58 +0200 | [diff] [blame] | 669 | if ((err = snd_card_set_generic_dev(au1000->card)) < 0) { |
| 670 | snd_card_free(au1000->card); |
| 671 | return err; |
| 672 | } |
| 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | if ((err = snd_card_register(au1000->card)) < 0) { |
| 675 | snd_card_free(au1000->card); |
| 676 | return err; |
| 677 | } |
| 678 | |
| 679 | printk( KERN_INFO "ALSA AC97: Driver Initialized\n" ); |
| 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | static void __exit au1000_exit(void) |
| 684 | { |
| 685 | snd_card_free(au1000->card); |
| 686 | } |
| 687 | |
| 688 | module_init(au1000_init); |
| 689 | module_exit(au1000_exit); |
| 690 | |