Hans-Christian Egtvedt | eafe570 | 2007-07-23 16:01:38 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC |
| 3 | * |
| 4 | * Copyright (C) 2006-2007 Atmel Norway |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published by |
| 8 | * the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | /*#define DEBUG*/ |
| 12 | |
| 13 | #include <linux/clk.h> |
| 14 | #include <linux/err.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/dma-mapping.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/io.h> |
| 23 | |
| 24 | #include <sound/driver.h> |
| 25 | #include <sound/initval.h> |
| 26 | #include <sound/control.h> |
| 27 | #include <sound/core.h> |
| 28 | #include <sound/pcm.h> |
| 29 | |
| 30 | #include <linux/atmel-ssc.h> |
| 31 | |
| 32 | #include <linux/spi/spi.h> |
| 33 | #include <linux/spi/at73c213.h> |
| 34 | |
| 35 | #include "at73c213.h" |
| 36 | |
| 37 | #define BITRATE_MIN 8000 /* Hardware limit? */ |
| 38 | #define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE |
| 39 | #define BITRATE_MAX 50000 /* Hardware limit. */ |
| 40 | |
| 41 | /* Initial (hardware reset) AT73C213 register values. */ |
| 42 | static u8 snd_at73c213_original_image[18] = |
| 43 | { |
| 44 | 0x00, /* 00 - CTRL */ |
| 45 | 0x05, /* 01 - LLIG */ |
| 46 | 0x05, /* 02 - RLIG */ |
| 47 | 0x08, /* 03 - LPMG */ |
| 48 | 0x08, /* 04 - RPMG */ |
| 49 | 0x00, /* 05 - LLOG */ |
| 50 | 0x00, /* 06 - RLOG */ |
| 51 | 0x22, /* 07 - OLC */ |
| 52 | 0x09, /* 08 - MC */ |
| 53 | 0x00, /* 09 - CSFC */ |
| 54 | 0x00, /* 0A - MISC */ |
| 55 | 0x00, /* 0B - */ |
| 56 | 0x00, /* 0C - PRECH */ |
| 57 | 0x05, /* 0D - AUXG */ |
| 58 | 0x00, /* 0E - */ |
| 59 | 0x00, /* 0F - */ |
| 60 | 0x00, /* 10 - RST */ |
| 61 | 0x00, /* 11 - PA_CTRL */ |
| 62 | }; |
| 63 | |
| 64 | struct snd_at73c213 { |
| 65 | struct snd_card *card; |
| 66 | struct snd_pcm *pcm; |
| 67 | struct snd_pcm_substream *substream; |
| 68 | struct at73c213_board_info *board; |
| 69 | int irq; |
| 70 | int period; |
| 71 | unsigned long bitrate; |
| 72 | struct clk *bitclk; |
| 73 | struct ssc_device *ssc; |
| 74 | struct spi_device *spi; |
| 75 | u8 spi_wbuffer[2]; |
| 76 | u8 spi_rbuffer[2]; |
| 77 | /* Image of the SPI registers in AT73C213. */ |
| 78 | u8 reg_image[18]; |
| 79 | /* Protect registers against concurrent access. */ |
| 80 | spinlock_t lock; |
| 81 | }; |
| 82 | |
| 83 | #define get_chip(card) ((struct snd_at73c213 *)card->private_data) |
| 84 | |
| 85 | static int |
| 86 | snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val) |
| 87 | { |
| 88 | struct spi_message msg; |
| 89 | struct spi_transfer msg_xfer = { |
| 90 | .len = 2, |
| 91 | .cs_change = 0, |
| 92 | }; |
| 93 | int retval; |
| 94 | |
| 95 | spi_message_init(&msg); |
| 96 | |
| 97 | chip->spi_wbuffer[0] = reg; |
| 98 | chip->spi_wbuffer[1] = val; |
| 99 | |
| 100 | msg_xfer.tx_buf = chip->spi_wbuffer; |
| 101 | msg_xfer.rx_buf = chip->spi_rbuffer; |
| 102 | spi_message_add_tail(&msg_xfer, &msg); |
| 103 | |
| 104 | retval = spi_sync(chip->spi, &msg); |
| 105 | |
| 106 | if (!retval) |
| 107 | chip->reg_image[reg] = val; |
| 108 | |
| 109 | return retval; |
| 110 | } |
| 111 | |
| 112 | static struct snd_pcm_hardware snd_at73c213_playback_hw = { |
| 113 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 114 | SNDRV_PCM_INFO_BLOCK_TRANSFER, |
| 115 | .formats = SNDRV_PCM_FMTBIT_S16_BE, |
| 116 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
| 117 | .rate_min = 8000, /* Replaced by chip->bitrate later. */ |
| 118 | .rate_max = 50000, /* Replaced by chip->bitrate later. */ |
| 119 | .channels_min = 2, |
| 120 | .channels_max = 2, |
| 121 | .buffer_bytes_max = 64 * 1024 - 1, |
| 122 | .period_bytes_min = 512, |
| 123 | .period_bytes_max = 64 * 1024 - 1, |
| 124 | .periods_min = 4, |
| 125 | .periods_max = 1024, |
| 126 | }; |
| 127 | |
| 128 | /* |
| 129 | * Calculate and set bitrate and divisions. |
| 130 | */ |
| 131 | static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) |
| 132 | { |
| 133 | unsigned long ssc_rate = clk_get_rate(chip->ssc->clk); |
| 134 | unsigned long dac_rate_new, ssc_div, status; |
| 135 | unsigned long ssc_div_max, ssc_div_min; |
| 136 | int max_tries; |
| 137 | |
| 138 | /* |
| 139 | * We connect two clocks here, picking divisors so the I2S clocks |
| 140 | * out data at the same rate the DAC clocks it in ... and as close |
| 141 | * as practical to the desired target rate. |
| 142 | * |
| 143 | * The DAC master clock (MCLK) is programmable, and is either 256 |
| 144 | * or (not here) 384 times the I2S output clock (BCLK). |
| 145 | */ |
| 146 | |
| 147 | /* SSC clock / (bitrate * stereo * 16-bit). */ |
| 148 | ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16); |
| 149 | ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16); |
| 150 | ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16); |
| 151 | max_tries = (ssc_div_max - ssc_div_min) / 2; |
| 152 | |
| 153 | if (max_tries < 1) |
| 154 | max_tries = 1; |
| 155 | |
| 156 | /* ssc_div must be a power of 2. */ |
| 157 | ssc_div = (ssc_div + 1) & ~1UL; |
| 158 | |
| 159 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) { |
| 160 | ssc_div -= 2; |
| 161 | if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX) |
| 162 | return -ENXIO; |
| 163 | } |
| 164 | |
| 165 | /* Search for a possible bitrate. */ |
| 166 | do { |
| 167 | /* SSC clock / (ssc divider * 16-bit * stereo). */ |
| 168 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) |
| 169 | return -ENXIO; |
| 170 | |
| 171 | /* 256 / (2 * 16) = 8 */ |
| 172 | dac_rate_new = 8 * (ssc_rate / ssc_div); |
| 173 | |
| 174 | status = clk_round_rate(chip->board->dac_clk, dac_rate_new); |
| 175 | if (status < 0) |
| 176 | return status; |
| 177 | |
| 178 | /* Ignore difference smaller than 256 Hz. */ |
| 179 | if ((status/256) == (dac_rate_new/256)) |
| 180 | goto set_rate; |
| 181 | |
| 182 | ssc_div += 2; |
| 183 | } while (--max_tries); |
| 184 | |
| 185 | /* Not able to find a valid bitrate. */ |
| 186 | return -ENXIO; |
| 187 | |
| 188 | set_rate: |
| 189 | status = clk_set_rate(chip->board->dac_clk, status); |
| 190 | if (status < 0) |
| 191 | return status; |
| 192 | |
| 193 | /* Set divider in SSC device. */ |
| 194 | ssc_writel(chip->ssc->regs, CMR, ssc_div/2); |
| 195 | |
| 196 | /* SSC clock / (ssc divider * 16-bit * stereo). */ |
| 197 | chip->bitrate = ssc_rate / (ssc_div * 16 * 2); |
| 198 | |
| 199 | dev_info(&chip->spi->dev, |
| 200 | "at73c213: supported bitrate is %lu (%lu divider)\n", |
| 201 | chip->bitrate, ssc_div); |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) |
| 207 | { |
| 208 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
| 209 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 210 | |
| 211 | snd_at73c213_playback_hw.rate_min = chip->bitrate; |
| 212 | snd_at73c213_playback_hw.rate_max = chip->bitrate; |
| 213 | runtime->hw = snd_at73c213_playback_hw; |
| 214 | chip->substream = substream; |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
| 219 | static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) |
| 220 | { |
| 221 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
| 222 | chip->substream = NULL; |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, |
| 227 | struct snd_pcm_hw_params *hw_params) |
| 228 | { |
| 229 | return snd_pcm_lib_malloc_pages(substream, |
| 230 | params_buffer_bytes(hw_params)); |
| 231 | } |
| 232 | |
| 233 | static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream) |
| 234 | { |
| 235 | return snd_pcm_lib_free_pages(substream); |
| 236 | } |
| 237 | |
| 238 | static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) |
| 239 | { |
| 240 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
| 241 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 242 | int block_size; |
| 243 | |
| 244 | block_size = frames_to_bytes(runtime, runtime->period_size); |
| 245 | |
| 246 | chip->period = 0; |
| 247 | |
| 248 | ssc_writel(chip->ssc->regs, PDC_TPR, |
| 249 | (long)runtime->dma_addr); |
| 250 | ssc_writel(chip->ssc->regs, PDC_TCR, runtime->period_size * 2); |
| 251 | ssc_writel(chip->ssc->regs, PDC_TNPR, |
| 252 | (long)runtime->dma_addr + block_size); |
| 253 | ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2); |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream, |
| 259 | int cmd) |
| 260 | { |
| 261 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
| 262 | int retval = 0; |
| 263 | |
| 264 | spin_lock(&chip->lock); |
| 265 | |
| 266 | switch (cmd) { |
| 267 | case SNDRV_PCM_TRIGGER_START: |
| 268 | ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX)); |
| 269 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN)); |
| 270 | break; |
| 271 | case SNDRV_PCM_TRIGGER_STOP: |
| 272 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS)); |
| 273 | ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX)); |
| 274 | break; |
| 275 | default: |
| 276 | dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd); |
| 277 | retval = -EINVAL; |
| 278 | break; |
| 279 | } |
| 280 | |
| 281 | spin_unlock(&chip->lock); |
| 282 | |
| 283 | return retval; |
| 284 | } |
| 285 | |
| 286 | static snd_pcm_uframes_t |
| 287 | snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream) |
| 288 | { |
| 289 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
| 290 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 291 | snd_pcm_uframes_t pos; |
| 292 | unsigned long bytes; |
| 293 | |
| 294 | bytes = ssc_readl(chip->ssc->regs, PDC_TPR) |
| 295 | - (unsigned long)runtime->dma_addr; |
| 296 | |
| 297 | pos = bytes_to_frames(runtime, bytes); |
| 298 | if (pos >= runtime->buffer_size) |
| 299 | pos -= runtime->buffer_size; |
| 300 | |
| 301 | return pos; |
| 302 | } |
| 303 | |
| 304 | static struct snd_pcm_ops at73c213_playback_ops = { |
| 305 | .open = snd_at73c213_pcm_open, |
| 306 | .close = snd_at73c213_pcm_close, |
| 307 | .ioctl = snd_pcm_lib_ioctl, |
| 308 | .hw_params = snd_at73c213_pcm_hw_params, |
| 309 | .hw_free = snd_at73c213_pcm_hw_free, |
| 310 | .prepare = snd_at73c213_pcm_prepare, |
| 311 | .trigger = snd_at73c213_pcm_trigger, |
| 312 | .pointer = snd_at73c213_pcm_pointer, |
| 313 | }; |
| 314 | |
| 315 | static void snd_at73c213_pcm_free(struct snd_pcm *pcm) |
| 316 | { |
| 317 | struct snd_at73c213 *chip = snd_pcm_chip(pcm); |
| 318 | if (chip->pcm) { |
| 319 | snd_pcm_lib_preallocate_free_for_all(chip->pcm); |
| 320 | chip->pcm = NULL; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) |
| 325 | { |
| 326 | struct snd_pcm *pcm; |
| 327 | int retval; |
| 328 | |
| 329 | retval = snd_pcm_new(chip->card, chip->card->shortname, |
| 330 | device, 1, 0, &pcm); |
| 331 | if (retval < 0) |
| 332 | goto out; |
| 333 | |
| 334 | pcm->private_data = chip; |
| 335 | pcm->private_free = snd_at73c213_pcm_free; |
| 336 | pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; |
| 337 | strcpy(pcm->name, "at73c213"); |
| 338 | chip->pcm = pcm; |
| 339 | |
| 340 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops); |
| 341 | |
| 342 | retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm, |
| 343 | SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev, |
| 344 | 64 * 1024, 64 * 1024); |
| 345 | out: |
| 346 | return retval; |
| 347 | } |
| 348 | |
| 349 | static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) |
| 350 | { |
| 351 | struct snd_at73c213 *chip = dev_id; |
| 352 | struct snd_pcm_runtime *runtime = chip->substream->runtime; |
| 353 | u32 status; |
| 354 | int offset; |
| 355 | int block_size; |
| 356 | int next_period; |
| 357 | int retval = IRQ_NONE; |
| 358 | |
| 359 | spin_lock(&chip->lock); |
| 360 | |
| 361 | block_size = frames_to_bytes(runtime, runtime->period_size); |
| 362 | status = ssc_readl(chip->ssc->regs, IMR); |
| 363 | |
| 364 | if (status & SSC_BIT(IMR_ENDTX)) { |
| 365 | chip->period++; |
| 366 | if (chip->period == runtime->periods) |
| 367 | chip->period = 0; |
| 368 | next_period = chip->period + 1; |
| 369 | if (next_period == runtime->periods) |
| 370 | next_period = 0; |
| 371 | |
| 372 | offset = block_size * next_period; |
| 373 | |
| 374 | ssc_writel(chip->ssc->regs, PDC_TNPR, |
| 375 | (long)runtime->dma_addr + offset); |
| 376 | ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2); |
| 377 | retval = IRQ_HANDLED; |
| 378 | } |
| 379 | |
| 380 | ssc_readl(chip->ssc->regs, IMR); |
| 381 | spin_unlock(&chip->lock); |
| 382 | |
| 383 | if (status & SSC_BIT(IMR_ENDTX)) |
| 384 | snd_pcm_period_elapsed(chip->substream); |
| 385 | |
| 386 | return retval; |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Mixer functions. |
| 391 | */ |
| 392 | static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol, |
| 393 | struct snd_ctl_elem_value *ucontrol) |
| 394 | { |
| 395 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
| 396 | int reg = kcontrol->private_value & 0xff; |
| 397 | int shift = (kcontrol->private_value >> 8) & 0xff; |
| 398 | int mask = (kcontrol->private_value >> 16) & 0xff; |
| 399 | int invert = (kcontrol->private_value >> 24) & 0xff; |
| 400 | |
| 401 | spin_lock_irq(&chip->lock); |
| 402 | |
| 403 | ucontrol->value.integer.value[0] = |
| 404 | (chip->reg_image[reg] >> shift) & mask; |
| 405 | |
| 406 | if (invert) |
| 407 | ucontrol->value.integer.value[0] = |
| 408 | mask - ucontrol->value.integer.value[0]; |
| 409 | |
| 410 | spin_unlock_irq(&chip->lock); |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol, |
| 416 | struct snd_ctl_elem_value *ucontrol) |
| 417 | { |
| 418 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
| 419 | int reg = kcontrol->private_value & 0xff; |
| 420 | int shift = (kcontrol->private_value >> 8) & 0xff; |
| 421 | int mask = (kcontrol->private_value >> 16) & 0xff; |
| 422 | int invert = (kcontrol->private_value >> 24) & 0xff; |
| 423 | int change, retval; |
| 424 | unsigned short val; |
| 425 | |
| 426 | val = (ucontrol->value.integer.value[0] & mask); |
| 427 | if (invert) |
| 428 | val = mask - val; |
| 429 | val <<= shift; |
| 430 | |
| 431 | spin_lock_irq(&chip->lock); |
| 432 | |
| 433 | val = (chip->reg_image[reg] & ~(mask << shift)) | val; |
| 434 | change = val != chip->reg_image[reg]; |
| 435 | retval = snd_at73c213_write_reg(chip, reg, val); |
| 436 | |
| 437 | spin_unlock_irq(&chip->lock); |
| 438 | |
| 439 | if (retval) |
| 440 | return retval; |
| 441 | |
| 442 | return change; |
| 443 | } |
| 444 | |
| 445 | static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol, |
| 446 | struct snd_ctl_elem_info *uinfo) |
| 447 | { |
| 448 | int mask = (kcontrol->private_value >> 24) & 0xff; |
| 449 | |
| 450 | if (mask == 1) |
| 451 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| 452 | else |
| 453 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 454 | |
| 455 | uinfo->count = 2; |
| 456 | uinfo->value.integer.min = 0; |
| 457 | uinfo->value.integer.max = mask; |
| 458 | |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol, |
| 463 | struct snd_ctl_elem_value *ucontrol) |
| 464 | { |
| 465 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
| 466 | int left_reg = kcontrol->private_value & 0xff; |
| 467 | int right_reg = (kcontrol->private_value >> 8) & 0xff; |
| 468 | int shift_left = (kcontrol->private_value >> 16) & 0x07; |
| 469 | int shift_right = (kcontrol->private_value >> 19) & 0x07; |
| 470 | int mask = (kcontrol->private_value >> 24) & 0xff; |
| 471 | int invert = (kcontrol->private_value >> 22) & 1; |
| 472 | |
| 473 | spin_lock_irq(&chip->lock); |
| 474 | |
| 475 | ucontrol->value.integer.value[0] = |
| 476 | (chip->reg_image[left_reg] >> shift_left) & mask; |
| 477 | ucontrol->value.integer.value[1] = |
| 478 | (chip->reg_image[right_reg] >> shift_right) & mask; |
| 479 | |
| 480 | if (invert) { |
| 481 | ucontrol->value.integer.value[0] = |
| 482 | mask - ucontrol->value.integer.value[0]; |
| 483 | ucontrol->value.integer.value[1] = |
| 484 | mask - ucontrol->value.integer.value[1]; |
| 485 | } |
| 486 | |
| 487 | spin_unlock_irq(&chip->lock); |
| 488 | |
| 489 | return 0; |
| 490 | } |
| 491 | |
| 492 | static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol, |
| 493 | struct snd_ctl_elem_value *ucontrol) |
| 494 | { |
| 495 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
| 496 | int left_reg = kcontrol->private_value & 0xff; |
| 497 | int right_reg = (kcontrol->private_value >> 8) & 0xff; |
| 498 | int shift_left = (kcontrol->private_value >> 16) & 0x07; |
| 499 | int shift_right = (kcontrol->private_value >> 19) & 0x07; |
| 500 | int mask = (kcontrol->private_value >> 24) & 0xff; |
| 501 | int invert = (kcontrol->private_value >> 22) & 1; |
| 502 | int change, retval; |
| 503 | unsigned short val1, val2; |
| 504 | |
| 505 | val1 = ucontrol->value.integer.value[0] & mask; |
| 506 | val2 = ucontrol->value.integer.value[1] & mask; |
| 507 | if (invert) { |
| 508 | val1 = mask - val1; |
| 509 | val2 = mask - val2; |
| 510 | } |
| 511 | val1 <<= shift_left; |
| 512 | val2 <<= shift_right; |
| 513 | |
| 514 | spin_lock_irq(&chip->lock); |
| 515 | |
| 516 | val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1; |
| 517 | val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2; |
| 518 | change = val1 != chip->reg_image[left_reg] |
| 519 | || val2 != chip->reg_image[right_reg]; |
| 520 | retval = snd_at73c213_write_reg(chip, left_reg, val1); |
| 521 | if (retval) { |
| 522 | spin_unlock_irq(&chip->lock); |
| 523 | goto out; |
| 524 | } |
| 525 | retval = snd_at73c213_write_reg(chip, right_reg, val2); |
| 526 | if (retval) { |
| 527 | spin_unlock_irq(&chip->lock); |
| 528 | goto out; |
| 529 | } |
| 530 | |
| 531 | spin_unlock_irq(&chip->lock); |
| 532 | |
| 533 | return change; |
| 534 | |
| 535 | out: |
| 536 | return retval; |
| 537 | } |
| 538 | |
Takashi Iwai | 4b6c26a | 2007-11-15 16:18:14 +0100 | [diff] [blame^] | 539 | #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info |
Hans-Christian Egtvedt | eafe570 | 2007-07-23 16:01:38 +0200 | [diff] [blame] | 540 | |
| 541 | static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol, |
| 542 | struct snd_ctl_elem_value *ucontrol) |
| 543 | { |
| 544 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
| 545 | int reg = kcontrol->private_value & 0xff; |
| 546 | int shift = (kcontrol->private_value >> 8) & 0xff; |
| 547 | int invert = (kcontrol->private_value >> 24) & 0xff; |
| 548 | |
| 549 | spin_lock_irq(&chip->lock); |
| 550 | |
| 551 | ucontrol->value.integer.value[0] = |
| 552 | (chip->reg_image[reg] >> shift) & 0x01; |
| 553 | |
| 554 | if (invert) |
| 555 | ucontrol->value.integer.value[0] = |
| 556 | 0x01 - ucontrol->value.integer.value[0]; |
| 557 | |
| 558 | spin_unlock_irq(&chip->lock); |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol, |
| 564 | struct snd_ctl_elem_value *ucontrol) |
| 565 | { |
| 566 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
| 567 | int reg = kcontrol->private_value & 0xff; |
| 568 | int shift = (kcontrol->private_value >> 8) & 0xff; |
| 569 | int mask = (kcontrol->private_value >> 16) & 0xff; |
| 570 | int invert = (kcontrol->private_value >> 24) & 0xff; |
| 571 | int change, retval; |
| 572 | unsigned short val; |
| 573 | |
| 574 | if (ucontrol->value.integer.value[0]) |
| 575 | val = mask; |
| 576 | else |
| 577 | val = 0; |
| 578 | |
| 579 | if (invert) |
| 580 | val = mask - val; |
| 581 | val <<= shift; |
| 582 | |
| 583 | spin_lock_irq(&chip->lock); |
| 584 | |
| 585 | val |= (chip->reg_image[reg] & ~(mask << shift)); |
| 586 | change = val != chip->reg_image[reg]; |
| 587 | |
| 588 | retval = snd_at73c213_write_reg(chip, reg, val); |
| 589 | |
| 590 | spin_unlock_irq(&chip->lock); |
| 591 | |
| 592 | if (retval) |
| 593 | return retval; |
| 594 | |
| 595 | return change; |
| 596 | } |
| 597 | |
| 598 | static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol, |
| 599 | struct snd_ctl_elem_info *uinfo) |
| 600 | { |
| 601 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 602 | uinfo->count = 1; |
| 603 | uinfo->value.integer.min = 0; |
| 604 | uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1; |
| 605 | |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | static int snd_at73c213_line_capture_volume_info( |
| 610 | struct snd_kcontrol *kcontrol, |
| 611 | struct snd_ctl_elem_info *uinfo) |
| 612 | { |
| 613 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 614 | uinfo->count = 2; |
| 615 | /* When inverted will give values 0x10001 => 0. */ |
| 616 | uinfo->value.integer.min = 14; |
| 617 | uinfo->value.integer.max = 31; |
| 618 | |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | static int snd_at73c213_aux_capture_volume_info( |
| 623 | struct snd_kcontrol *kcontrol, |
| 624 | struct snd_ctl_elem_info *uinfo) |
| 625 | { |
| 626 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| 627 | uinfo->count = 1; |
| 628 | /* When inverted will give values 0x10001 => 0. */ |
| 629 | uinfo->value.integer.min = 14; |
| 630 | uinfo->value.integer.max = 31; |
| 631 | |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \ |
| 636 | { \ |
| 637 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
| 638 | .name = xname, \ |
| 639 | .index = xindex, \ |
| 640 | .info = snd_at73c213_mono_switch_info, \ |
| 641 | .get = snd_at73c213_mono_switch_get, \ |
| 642 | .put = snd_at73c213_mono_switch_put, \ |
| 643 | .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \ |
| 644 | } |
| 645 | |
| 646 | #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \ |
| 647 | { \ |
| 648 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
| 649 | .name = xname, \ |
| 650 | .index = xindex, \ |
| 651 | .info = snd_at73c213_stereo_info, \ |
| 652 | .get = snd_at73c213_stereo_get, \ |
| 653 | .put = snd_at73c213_stereo_put, \ |
| 654 | .private_value = (left_reg | (right_reg << 8) \ |
| 655 | | (shift_left << 16) | (shift_right << 19) \ |
| 656 | | (mask << 24) | (invert << 22)) \ |
| 657 | } |
| 658 | |
| 659 | static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = { |
| 660 | AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1), |
| 661 | AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1), |
| 662 | AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1), |
| 663 | AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1), |
| 664 | AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV, |
| 665 | 0x01, 0), |
| 666 | { |
| 667 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 668 | .name = "PA Playback Volume", |
| 669 | .index = 0, |
| 670 | .info = snd_at73c213_pa_volume_info, |
| 671 | .get = snd_at73c213_mono_get, |
| 672 | .put = snd_at73c213_mono_put, |
| 673 | .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \ |
| 674 | (0x0f << 16) | (1 << 24), |
| 675 | }, |
| 676 | AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP, |
| 677 | 0x01, 1), |
| 678 | AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0), |
| 679 | { |
| 680 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 681 | .name = "Aux Capture Volume", |
| 682 | .index = 0, |
| 683 | .info = snd_at73c213_aux_capture_volume_info, |
| 684 | .get = snd_at73c213_mono_get, |
| 685 | .put = snd_at73c213_mono_put, |
| 686 | .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24), |
| 687 | }, |
| 688 | AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN, |
| 689 | 0x01, 0), |
| 690 | { |
| 691 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| 692 | .name = "Line Capture Volume", |
| 693 | .index = 0, |
| 694 | .info = snd_at73c213_line_capture_volume_info, |
| 695 | .get = snd_at73c213_stereo_get, |
| 696 | .put = snd_at73c213_stereo_put, |
| 697 | .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19) |
| 698 | | (0x1f << 24) | (1 << 22), |
| 699 | }, |
| 700 | AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0), |
| 701 | }; |
| 702 | |
| 703 | static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip) |
| 704 | { |
| 705 | struct snd_card *card; |
| 706 | int errval, idx; |
| 707 | |
| 708 | if (chip == NULL || chip->pcm == NULL) |
| 709 | return -EINVAL; |
| 710 | |
| 711 | card = chip->card; |
| 712 | |
| 713 | strcpy(card->mixername, chip->pcm->name); |
| 714 | |
| 715 | for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) { |
| 716 | errval = snd_ctl_add(card, |
| 717 | snd_ctl_new1(&snd_at73c213_controls[idx], |
| 718 | chip)); |
| 719 | if (errval < 0) |
| 720 | goto cleanup; |
| 721 | } |
| 722 | |
| 723 | return 0; |
| 724 | |
| 725 | cleanup: |
| 726 | for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) { |
| 727 | struct snd_kcontrol *kctl; |
| 728 | kctl = snd_ctl_find_numid(card, idx); |
| 729 | if (kctl) |
| 730 | snd_ctl_remove(card, kctl); |
| 731 | } |
| 732 | return errval; |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | * Device functions |
| 737 | */ |
| 738 | static int snd_at73c213_ssc_init(struct snd_at73c213 *chip) |
| 739 | { |
| 740 | /* |
| 741 | * Continuous clock output. |
| 742 | * Starts on falling TF. |
| 743 | * Delay 1 cycle (1 bit). |
| 744 | * Periode is 16 bit (16 - 1). |
| 745 | */ |
| 746 | ssc_writel(chip->ssc->regs, TCMR, |
| 747 | SSC_BF(TCMR_CKO, 1) |
| 748 | | SSC_BF(TCMR_START, 4) |
| 749 | | SSC_BF(TCMR_STTDLY, 1) |
| 750 | | SSC_BF(TCMR_PERIOD, 16 - 1)); |
| 751 | /* |
| 752 | * Data length is 16 bit (16 - 1). |
| 753 | * Transmit MSB first. |
| 754 | * Transmit 2 words each transfer. |
| 755 | * Frame sync length is 16 bit (16 - 1). |
| 756 | * Frame starts on negative pulse. |
| 757 | */ |
| 758 | ssc_writel(chip->ssc->regs, TFMR, |
| 759 | SSC_BF(TFMR_DATLEN, 16 - 1) |
| 760 | | SSC_BIT(TFMR_MSBF) |
| 761 | | SSC_BF(TFMR_DATNB, 1) |
| 762 | | SSC_BF(TFMR_FSLEN, 16 - 1) |
| 763 | | SSC_BF(TFMR_FSOS, 1)); |
| 764 | |
| 765 | return 0; |
| 766 | } |
| 767 | |
| 768 | static int snd_at73c213_chip_init(struct snd_at73c213 *chip) |
| 769 | { |
| 770 | int retval; |
| 771 | unsigned char dac_ctrl = 0; |
| 772 | |
| 773 | retval = snd_at73c213_set_bitrate(chip); |
| 774 | if (retval) |
| 775 | goto out; |
| 776 | |
| 777 | /* Enable DAC master clock. */ |
| 778 | clk_enable(chip->board->dac_clk); |
| 779 | |
| 780 | /* Initialize at73c213 on SPI bus. */ |
| 781 | retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04); |
| 782 | if (retval) |
| 783 | goto out_clk; |
| 784 | msleep(1); |
| 785 | retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03); |
| 786 | if (retval) |
| 787 | goto out_clk; |
| 788 | |
| 789 | /* Precharge everything. */ |
| 790 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff); |
| 791 | if (retval) |
| 792 | goto out_clk; |
| 793 | retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH)); |
| 794 | if (retval) |
| 795 | goto out_clk; |
| 796 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, |
| 797 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR)); |
| 798 | if (retval) |
| 799 | goto out_clk; |
| 800 | |
| 801 | msleep(50); |
| 802 | |
| 803 | /* Stop precharging PA. */ |
| 804 | retval = snd_at73c213_write_reg(chip, PA_CTRL, |
| 805 | (1<<PA_CTRL_APALP) | 0x0f); |
| 806 | if (retval) |
| 807 | goto out_clk; |
| 808 | |
| 809 | msleep(450); |
| 810 | |
| 811 | /* Stop precharging DAC, turn on master power. */ |
| 812 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR)); |
| 813 | if (retval) |
| 814 | goto out_clk; |
| 815 | |
| 816 | msleep(1); |
| 817 | |
| 818 | /* Turn on DAC. */ |
| 819 | dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR) |
| 820 | | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR); |
| 821 | |
| 822 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl); |
| 823 | if (retval) |
| 824 | goto out_clk; |
| 825 | |
| 826 | /* Mute sound. */ |
| 827 | retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); |
| 828 | if (retval) |
| 829 | goto out_clk; |
| 830 | retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); |
| 831 | if (retval) |
| 832 | goto out_clk; |
| 833 | retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); |
| 834 | if (retval) |
| 835 | goto out_clk; |
| 836 | retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); |
| 837 | if (retval) |
| 838 | goto out_clk; |
| 839 | retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); |
| 840 | if (retval) |
| 841 | goto out_clk; |
| 842 | retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); |
| 843 | if (retval) |
| 844 | goto out_clk; |
| 845 | retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); |
| 846 | if (retval) |
| 847 | goto out_clk; |
| 848 | |
| 849 | /* Enable I2S device, i.e. clock output. */ |
| 850 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); |
| 851 | |
| 852 | goto out; |
| 853 | |
| 854 | out_clk: |
| 855 | clk_disable(chip->board->dac_clk); |
| 856 | out: |
| 857 | return retval; |
| 858 | } |
| 859 | |
| 860 | static int snd_at73c213_dev_free(struct snd_device *device) |
| 861 | { |
| 862 | struct snd_at73c213 *chip = device->device_data; |
| 863 | |
| 864 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
| 865 | if (chip->irq >= 0) { |
| 866 | free_irq(chip->irq, chip); |
| 867 | chip->irq = -1; |
| 868 | } |
| 869 | |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | static int __devinit snd_at73c213_dev_init(struct snd_card *card, |
| 874 | struct spi_device *spi) |
| 875 | { |
| 876 | static struct snd_device_ops ops = { |
| 877 | .dev_free = snd_at73c213_dev_free, |
| 878 | }; |
| 879 | struct snd_at73c213 *chip = get_chip(card); |
| 880 | int irq, retval; |
| 881 | |
| 882 | irq = chip->ssc->irq; |
| 883 | if (irq < 0) |
| 884 | return irq; |
| 885 | |
| 886 | spin_lock_init(&chip->lock); |
| 887 | chip->card = card; |
| 888 | chip->irq = -1; |
| 889 | |
| 890 | retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); |
| 891 | if (retval) { |
| 892 | dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq); |
| 893 | goto out; |
| 894 | } |
| 895 | chip->irq = irq; |
| 896 | |
| 897 | memcpy(&chip->reg_image, &snd_at73c213_original_image, |
| 898 | sizeof(snd_at73c213_original_image)); |
| 899 | |
| 900 | retval = snd_at73c213_ssc_init(chip); |
| 901 | if (retval) |
| 902 | goto out_irq; |
| 903 | |
| 904 | retval = snd_at73c213_chip_init(chip); |
| 905 | if (retval) |
| 906 | goto out_irq; |
| 907 | |
| 908 | retval = snd_at73c213_pcm_new(chip, 0); |
| 909 | if (retval) |
| 910 | goto out_irq; |
| 911 | |
| 912 | retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); |
| 913 | if (retval) |
| 914 | goto out_irq; |
| 915 | |
| 916 | retval = snd_at73c213_mixer(chip); |
| 917 | if (retval) |
| 918 | goto out_snd_dev; |
| 919 | |
| 920 | snd_card_set_dev(card, &spi->dev); |
| 921 | |
| 922 | goto out; |
| 923 | |
| 924 | out_snd_dev: |
| 925 | snd_device_free(card, chip); |
| 926 | out_irq: |
| 927 | free_irq(chip->irq, chip); |
| 928 | chip->irq = -1; |
| 929 | out: |
| 930 | return retval; |
| 931 | } |
| 932 | |
| 933 | static int snd_at73c213_probe(struct spi_device *spi) |
| 934 | { |
| 935 | struct snd_card *card; |
| 936 | struct snd_at73c213 *chip; |
| 937 | struct at73c213_board_info *board; |
| 938 | int retval; |
| 939 | char id[16]; |
| 940 | |
| 941 | board = spi->dev.platform_data; |
| 942 | if (!board) { |
| 943 | dev_dbg(&spi->dev, "no platform_data\n"); |
| 944 | return -ENXIO; |
| 945 | } |
| 946 | |
| 947 | if (!board->dac_clk) { |
| 948 | dev_dbg(&spi->dev, "no DAC clk\n"); |
| 949 | return -ENXIO; |
| 950 | } |
| 951 | |
| 952 | if (IS_ERR(board->dac_clk)) { |
| 953 | dev_dbg(&spi->dev, "no DAC clk\n"); |
| 954 | return PTR_ERR(board->dac_clk); |
| 955 | } |
| 956 | |
| 957 | retval = -ENOMEM; |
| 958 | |
| 959 | /* Allocate "card" using some unused identifiers. */ |
| 960 | snprintf(id, sizeof id, "at73c213_%d", board->ssc_id); |
| 961 | card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213)); |
| 962 | if (!card) |
| 963 | goto out; |
| 964 | |
| 965 | chip = card->private_data; |
| 966 | chip->spi = spi; |
| 967 | chip->board = board; |
| 968 | |
| 969 | chip->ssc = ssc_request(board->ssc_id); |
| 970 | if (IS_ERR(chip->ssc)) { |
| 971 | dev_dbg(&spi->dev, "could not get ssc%d device\n", |
| 972 | board->ssc_id); |
| 973 | retval = PTR_ERR(chip->ssc); |
| 974 | goto out_card; |
| 975 | } |
| 976 | |
| 977 | retval = snd_at73c213_dev_init(card, spi); |
| 978 | if (retval) |
| 979 | goto out_ssc; |
| 980 | |
| 981 | strcpy(card->driver, "at73c213"); |
| 982 | strcpy(card->shortname, board->shortname); |
| 983 | sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq); |
| 984 | |
| 985 | retval = snd_card_register(card); |
| 986 | if (retval) |
| 987 | goto out_ssc; |
| 988 | |
| 989 | dev_set_drvdata(&spi->dev, card); |
| 990 | |
| 991 | goto out; |
| 992 | |
| 993 | out_ssc: |
| 994 | ssc_free(chip->ssc); |
| 995 | out_card: |
| 996 | snd_card_free(card); |
| 997 | out: |
| 998 | return retval; |
| 999 | } |
| 1000 | |
| 1001 | static int __devexit snd_at73c213_remove(struct spi_device *spi) |
| 1002 | { |
| 1003 | struct snd_card *card = dev_get_drvdata(&spi->dev); |
| 1004 | struct snd_at73c213 *chip = card->private_data; |
| 1005 | int retval; |
| 1006 | |
| 1007 | /* Stop playback. */ |
| 1008 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
| 1009 | |
| 1010 | /* Mute sound. */ |
| 1011 | retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); |
| 1012 | if (retval) |
| 1013 | goto out; |
| 1014 | retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); |
| 1015 | if (retval) |
| 1016 | goto out; |
| 1017 | retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); |
| 1018 | if (retval) |
| 1019 | goto out; |
| 1020 | retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); |
| 1021 | if (retval) |
| 1022 | goto out; |
| 1023 | retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); |
| 1024 | if (retval) |
| 1025 | goto out; |
| 1026 | retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); |
| 1027 | if (retval) |
| 1028 | goto out; |
| 1029 | retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); |
| 1030 | if (retval) |
| 1031 | goto out; |
| 1032 | |
| 1033 | /* Turn off PA. */ |
| 1034 | retval = snd_at73c213_write_reg(chip, PA_CTRL, |
| 1035 | chip->reg_image[PA_CTRL] | 0x0f); |
| 1036 | if (retval) |
| 1037 | goto out; |
| 1038 | msleep(10); |
| 1039 | retval = snd_at73c213_write_reg(chip, PA_CTRL, |
| 1040 | (1 << PA_CTRL_APALP) | 0x0f); |
| 1041 | if (retval) |
| 1042 | goto out; |
| 1043 | |
| 1044 | /* Turn off external DAC. */ |
| 1045 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c); |
| 1046 | if (retval) |
| 1047 | goto out; |
| 1048 | msleep(2); |
| 1049 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00); |
| 1050 | if (retval) |
| 1051 | goto out; |
| 1052 | |
| 1053 | /* Turn off master power. */ |
| 1054 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00); |
| 1055 | if (retval) |
| 1056 | goto out; |
| 1057 | |
| 1058 | out: |
| 1059 | /* Stop DAC master clock. */ |
| 1060 | clk_disable(chip->board->dac_clk); |
| 1061 | |
| 1062 | ssc_free(chip->ssc); |
| 1063 | snd_card_free(card); |
| 1064 | dev_set_drvdata(&spi->dev, NULL); |
| 1065 | |
| 1066 | return 0; |
| 1067 | } |
| 1068 | |
| 1069 | #ifdef CONFIG_PM |
| 1070 | static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg) |
| 1071 | { |
| 1072 | struct snd_card *card = dev_get_drvdata(&spi->dev); |
| 1073 | struct snd_at73c213 *chip = card->private_data; |
| 1074 | |
| 1075 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
| 1076 | clk_disable(chip->board->dac_clk); |
| 1077 | |
| 1078 | return 0; |
| 1079 | } |
| 1080 | |
| 1081 | static int snd_at73c213_resume(struct spi_device *spi) |
| 1082 | { |
| 1083 | struct snd_card *card = dev_get_drvdata(&spi->dev); |
| 1084 | struct snd_at73c213 *chip = card->private_data; |
| 1085 | |
| 1086 | clk_enable(chip->board->dac_clk); |
| 1087 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); |
| 1088 | |
| 1089 | return 0; |
| 1090 | } |
| 1091 | #else |
| 1092 | #define snd_at73c213_suspend NULL |
| 1093 | #define snd_at73c213_resume NULL |
| 1094 | #endif |
| 1095 | |
| 1096 | static struct spi_driver at73c213_driver = { |
| 1097 | .driver = { |
| 1098 | .name = "at73c213", |
| 1099 | }, |
| 1100 | .probe = snd_at73c213_probe, |
| 1101 | .suspend = snd_at73c213_suspend, |
| 1102 | .resume = snd_at73c213_resume, |
| 1103 | .remove = __devexit_p(snd_at73c213_remove), |
| 1104 | }; |
| 1105 | |
| 1106 | static int __init at73c213_init(void) |
| 1107 | { |
| 1108 | return spi_register_driver(&at73c213_driver); |
| 1109 | } |
| 1110 | module_init(at73c213_init); |
| 1111 | |
| 1112 | static void __exit at73c213_exit(void) |
| 1113 | { |
| 1114 | spi_unregister_driver(&at73c213_driver); |
| 1115 | } |
| 1116 | module_exit(at73c213_exit); |
| 1117 | |
| 1118 | MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>"); |
| 1119 | MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC"); |
| 1120 | MODULE_LICENSE("GPL"); |