Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 1 | /* |
| 2 | * wm8804.c -- WM8804 S/PDIF transceiver driver |
| 3 | * |
| 4 | * Copyright 2010 Wolfson Microelectronics plc |
| 5 | * |
| 6 | * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/moduleparam.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/pm.h> |
| 18 | #include <linux/i2c.h> |
| 19 | #include <linux/spi/spi.h> |
| 20 | #include <linux/regulator/consumer.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <sound/core.h> |
| 23 | #include <sound/pcm.h> |
| 24 | #include <sound/pcm_params.h> |
| 25 | #include <sound/soc.h> |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 26 | #include <sound/initval.h> |
| 27 | #include <sound/tlv.h> |
| 28 | |
| 29 | #include "wm8804.h" |
| 30 | |
| 31 | #define WM8804_NUM_SUPPLIES 2 |
| 32 | static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = { |
| 33 | "PVDD", |
| 34 | "DVDD" |
| 35 | }; |
| 36 | |
| 37 | static const u8 wm8804_reg_defs[] = { |
| 38 | 0x05, /* R0 - RST/DEVID1 */ |
| 39 | 0x88, /* R1 - DEVID2 */ |
| 40 | 0x04, /* R2 - DEVREV */ |
| 41 | 0x21, /* R3 - PLL1 */ |
| 42 | 0xFD, /* R4 - PLL2 */ |
| 43 | 0x36, /* R5 - PLL3 */ |
| 44 | 0x07, /* R6 - PLL4 */ |
| 45 | 0x16, /* R7 - PLL5 */ |
| 46 | 0x18, /* R8 - PLL6 */ |
| 47 | 0xFF, /* R9 - SPDMODE */ |
| 48 | 0x00, /* R10 - INTMASK */ |
| 49 | 0x00, /* R11 - INTSTAT */ |
| 50 | 0x00, /* R12 - SPDSTAT */ |
| 51 | 0x00, /* R13 - RXCHAN1 */ |
| 52 | 0x00, /* R14 - RXCHAN2 */ |
| 53 | 0x00, /* R15 - RXCHAN3 */ |
| 54 | 0x00, /* R16 - RXCHAN4 */ |
| 55 | 0x00, /* R17 - RXCHAN5 */ |
| 56 | 0x00, /* R18 - SPDTX1 */ |
| 57 | 0x00, /* R19 - SPDTX2 */ |
| 58 | 0x00, /* R20 - SPDTX3 */ |
| 59 | 0x71, /* R21 - SPDTX4 */ |
| 60 | 0x0B, /* R22 - SPDTX5 */ |
| 61 | 0x70, /* R23 - GPO0 */ |
| 62 | 0x57, /* R24 - GPO1 */ |
| 63 | 0x00, /* R25 */ |
| 64 | 0x42, /* R26 - GPO2 */ |
| 65 | 0x06, /* R27 - AIFTX */ |
| 66 | 0x06, /* R28 - AIFRX */ |
| 67 | 0x80, /* R29 - SPDRX1 */ |
| 68 | 0x07, /* R30 - PWRDN */ |
| 69 | }; |
| 70 | |
| 71 | struct wm8804_priv { |
| 72 | enum snd_soc_control_type control_type; |
| 73 | struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES]; |
| 74 | struct notifier_block disable_nb[WM8804_NUM_SUPPLIES]; |
| 75 | struct snd_soc_codec *codec; |
| 76 | }; |
| 77 | |
| 78 | static int txsrc_get(struct snd_kcontrol *kcontrol, |
| 79 | struct snd_ctl_elem_value *ucontrol); |
| 80 | |
| 81 | static int txsrc_put(struct snd_kcontrol *kcontrol, |
| 82 | struct snd_ctl_elem_value *ucontrol); |
| 83 | |
| 84 | /* |
| 85 | * We can't use the same notifier block for more than one supply and |
| 86 | * there's no way I can see to get from a callback to the caller |
| 87 | * except container_of(). |
| 88 | */ |
| 89 | #define WM8804_REGULATOR_EVENT(n) \ |
| 90 | static int wm8804_regulator_event_##n(struct notifier_block *nb, \ |
| 91 | unsigned long event, void *data) \ |
| 92 | { \ |
| 93 | struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \ |
| 94 | disable_nb[n]); \ |
| 95 | if (event & REGULATOR_EVENT_DISABLE) { \ |
| 96 | wm8804->codec->cache_sync = 1; \ |
| 97 | } \ |
| 98 | return 0; \ |
| 99 | } |
| 100 | |
| 101 | WM8804_REGULATOR_EVENT(0) |
| 102 | WM8804_REGULATOR_EVENT(1) |
| 103 | |
| 104 | static const char *txsrc_text[] = { "S/PDIF RX", "AIF" }; |
| 105 | static const SOC_ENUM_SINGLE_EXT_DECL(txsrc, txsrc_text); |
| 106 | |
| 107 | static const struct snd_kcontrol_new wm8804_snd_controls[] = { |
| 108 | SOC_ENUM_EXT("Input Source", txsrc, txsrc_get, txsrc_put), |
| 109 | SOC_SINGLE("TX Playback Switch", WM8804_PWRDN, 2, 1, 1), |
| 110 | SOC_SINGLE("AIF Playback Switch", WM8804_PWRDN, 4, 1, 1) |
| 111 | }; |
| 112 | |
| 113 | static int txsrc_get(struct snd_kcontrol *kcontrol, |
| 114 | struct snd_ctl_elem_value *ucontrol) |
| 115 | { |
| 116 | struct snd_soc_codec *codec; |
| 117 | unsigned int src; |
| 118 | |
| 119 | codec = snd_kcontrol_chip(kcontrol); |
| 120 | src = snd_soc_read(codec, WM8804_SPDTX4); |
| 121 | if (src & 0x40) |
| 122 | ucontrol->value.integer.value[0] = 1; |
| 123 | else |
| 124 | ucontrol->value.integer.value[0] = 0; |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int txsrc_put(struct snd_kcontrol *kcontrol, |
| 130 | struct snd_ctl_elem_value *ucontrol) |
| 131 | { |
| 132 | struct snd_soc_codec *codec; |
| 133 | unsigned int src, txpwr; |
| 134 | |
| 135 | codec = snd_kcontrol_chip(kcontrol); |
| 136 | |
| 137 | if (ucontrol->value.integer.value[0] != 0 |
| 138 | && ucontrol->value.integer.value[0] != 1) |
| 139 | return -EINVAL; |
| 140 | |
| 141 | src = snd_soc_read(codec, WM8804_SPDTX4); |
| 142 | switch ((src & 0x40) >> 6) { |
| 143 | case 0: |
| 144 | if (!ucontrol->value.integer.value[0]) |
| 145 | return 0; |
| 146 | break; |
| 147 | case 1: |
| 148 | if (ucontrol->value.integer.value[1]) |
| 149 | return 0; |
| 150 | break; |
| 151 | } |
| 152 | |
| 153 | /* save the current power state of the transmitter */ |
| 154 | txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4; |
| 155 | /* power down the transmitter */ |
| 156 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4); |
| 157 | /* set the tx source */ |
| 158 | snd_soc_update_bits(codec, WM8804_SPDTX4, 0x40, |
| 159 | ucontrol->value.integer.value[0] << 6); |
| 160 | |
| 161 | if (ucontrol->value.integer.value[0]) { |
| 162 | /* power down the receiver */ |
| 163 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0x2); |
| 164 | /* power up the AIF */ |
| 165 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0); |
| 166 | } else { |
| 167 | /* don't power down the AIF -- may be used as an output */ |
| 168 | /* power up the receiver */ |
| 169 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0); |
| 170 | } |
| 171 | |
| 172 | /* restore the transmitter's configuration */ |
| 173 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
Dimitris Papastamos | d4754ec | 2011-01-13 12:20:37 +0000 | [diff] [blame] | 178 | static int wm8804_volatile(struct snd_soc_codec *codec, unsigned int reg) |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 179 | { |
| 180 | switch (reg) { |
| 181 | case WM8804_RST_DEVID1: |
| 182 | case WM8804_DEVID2: |
| 183 | case WM8804_DEVREV: |
| 184 | case WM8804_INTSTAT: |
| 185 | case WM8804_SPDSTAT: |
| 186 | case WM8804_RXCHAN1: |
| 187 | case WM8804_RXCHAN2: |
| 188 | case WM8804_RXCHAN3: |
| 189 | case WM8804_RXCHAN4: |
| 190 | case WM8804_RXCHAN5: |
| 191 | return 1; |
| 192 | default: |
| 193 | break; |
| 194 | } |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | static int wm8804_reset(struct snd_soc_codec *codec) |
| 200 | { |
| 201 | return snd_soc_write(codec, WM8804_RST_DEVID1, 0x0); |
| 202 | } |
| 203 | |
| 204 | static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
| 205 | { |
| 206 | struct snd_soc_codec *codec; |
| 207 | u16 format, master, bcp, lrp; |
| 208 | |
| 209 | codec = dai->codec; |
| 210 | |
| 211 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 212 | case SND_SOC_DAIFMT_I2S: |
| 213 | format = 0x2; |
| 214 | break; |
| 215 | case SND_SOC_DAIFMT_RIGHT_J: |
| 216 | format = 0x0; |
| 217 | break; |
| 218 | case SND_SOC_DAIFMT_LEFT_J: |
| 219 | format = 0x1; |
| 220 | break; |
| 221 | case SND_SOC_DAIFMT_DSP_A: |
| 222 | case SND_SOC_DAIFMT_DSP_B: |
| 223 | format = 0x3; |
| 224 | break; |
| 225 | default: |
| 226 | dev_err(dai->dev, "Unknown dai format\n"); |
| 227 | return -EINVAL; |
| 228 | } |
| 229 | |
| 230 | /* set data format */ |
| 231 | snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format); |
| 232 | snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format); |
| 233 | |
| 234 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 235 | case SND_SOC_DAIFMT_CBM_CFM: |
| 236 | master = 1; |
| 237 | break; |
| 238 | case SND_SOC_DAIFMT_CBS_CFS: |
| 239 | master = 0; |
| 240 | break; |
| 241 | default: |
| 242 | dev_err(dai->dev, "Unknown master/slave configuration\n"); |
| 243 | return -EINVAL; |
| 244 | } |
| 245 | |
| 246 | /* set master/slave mode */ |
| 247 | snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6); |
| 248 | |
| 249 | bcp = lrp = 0; |
| 250 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
| 251 | case SND_SOC_DAIFMT_NB_NF: |
| 252 | break; |
| 253 | case SND_SOC_DAIFMT_IB_IF: |
| 254 | bcp = lrp = 1; |
| 255 | break; |
| 256 | case SND_SOC_DAIFMT_IB_NF: |
| 257 | bcp = 1; |
| 258 | break; |
| 259 | case SND_SOC_DAIFMT_NB_IF: |
| 260 | lrp = 1; |
| 261 | break; |
| 262 | default: |
| 263 | dev_err(dai->dev, "Unknown polarity configuration\n"); |
| 264 | return -EINVAL; |
| 265 | } |
| 266 | |
| 267 | /* set frame inversion */ |
| 268 | snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20, |
| 269 | (bcp << 4) | (lrp << 5)); |
| 270 | snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20, |
| 271 | (bcp << 4) | (lrp << 5)); |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | static int wm8804_hw_params(struct snd_pcm_substream *substream, |
| 276 | struct snd_pcm_hw_params *params, |
| 277 | struct snd_soc_dai *dai) |
| 278 | { |
| 279 | struct snd_soc_codec *codec; |
| 280 | u16 blen; |
| 281 | |
| 282 | codec = dai->codec; |
| 283 | |
| 284 | switch (params_format(params)) { |
| 285 | case SNDRV_PCM_FORMAT_S16_LE: |
| 286 | blen = 0x0; |
| 287 | break; |
| 288 | case SNDRV_PCM_FORMAT_S20_3LE: |
| 289 | blen = 0x1; |
| 290 | break; |
| 291 | case SNDRV_PCM_FORMAT_S24_LE: |
| 292 | blen = 0x2; |
| 293 | break; |
| 294 | default: |
| 295 | dev_err(dai->dev, "Unsupported word length: %u\n", |
| 296 | params_format(params)); |
| 297 | return -EINVAL; |
| 298 | } |
| 299 | |
| 300 | /* set word length */ |
| 301 | snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2); |
| 302 | snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2); |
| 303 | |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | struct pll_div { |
| 308 | u32 prescale:1; |
| 309 | u32 mclkdiv:1; |
| 310 | u32 freqmode:2; |
| 311 | u32 n:4; |
| 312 | u32 k:22; |
| 313 | }; |
| 314 | |
| 315 | /* PLL rate to output rate divisions */ |
| 316 | static struct { |
| 317 | unsigned int div; |
| 318 | unsigned int freqmode; |
| 319 | unsigned int mclkdiv; |
| 320 | } post_table[] = { |
| 321 | { 2, 0, 0 }, |
| 322 | { 4, 0, 1 }, |
| 323 | { 4, 1, 0 }, |
| 324 | { 8, 1, 1 }, |
| 325 | { 8, 2, 0 }, |
| 326 | { 16, 2, 1 }, |
| 327 | { 12, 3, 0 }, |
| 328 | { 24, 3, 1 } |
| 329 | }; |
| 330 | |
| 331 | #define FIXED_PLL_SIZE ((1ULL << 22) * 10) |
| 332 | static int pll_factors(struct pll_div *pll_div, unsigned int target, |
| 333 | unsigned int source) |
| 334 | { |
| 335 | u64 Kpart; |
| 336 | unsigned long int K, Ndiv, Nmod, tmp; |
| 337 | int i; |
| 338 | |
| 339 | /* |
| 340 | * Scale the output frequency up; the PLL should run in the |
| 341 | * region of 90-100MHz. |
| 342 | */ |
| 343 | for (i = 0; i < ARRAY_SIZE(post_table); i++) { |
| 344 | tmp = target * post_table[i].div; |
| 345 | if (tmp >= 90000000 && tmp <= 100000000) { |
| 346 | pll_div->freqmode = post_table[i].freqmode; |
| 347 | pll_div->mclkdiv = post_table[i].mclkdiv; |
| 348 | target *= post_table[i].div; |
| 349 | break; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | if (i == ARRAY_SIZE(post_table)) { |
| 354 | pr_err("%s: Unable to scale output frequency: %uHz\n", |
| 355 | __func__, target); |
| 356 | return -EINVAL; |
| 357 | } |
| 358 | |
| 359 | pll_div->prescale = 0; |
| 360 | Ndiv = target / source; |
| 361 | if (Ndiv < 5) { |
| 362 | source >>= 1; |
| 363 | pll_div->prescale = 1; |
| 364 | Ndiv = target / source; |
| 365 | } |
| 366 | |
| 367 | if (Ndiv < 5 || Ndiv > 13) { |
| 368 | pr_err("%s: WM8804 N value is not within the recommended range: %lu\n", |
| 369 | __func__, Ndiv); |
| 370 | return -EINVAL; |
| 371 | } |
| 372 | pll_div->n = Ndiv; |
| 373 | |
| 374 | Nmod = target % source; |
| 375 | Kpart = FIXED_PLL_SIZE * (u64)Nmod; |
| 376 | |
| 377 | do_div(Kpart, source); |
| 378 | |
| 379 | K = Kpart & 0xffffffff; |
| 380 | if ((K % 10) >= 5) |
| 381 | K += 5; |
| 382 | K /= 10; |
| 383 | pll_div->k = K; |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id, |
| 389 | int source, unsigned int freq_in, |
| 390 | unsigned int freq_out) |
| 391 | { |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 392 | struct snd_soc_codec *codec; |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 393 | |
| 394 | codec = dai->codec; |
Dimitris Papastamos | 86ce6c9 | 2010-10-04 09:31:42 +0100 | [diff] [blame] | 395 | if (!freq_in || !freq_out) { |
| 396 | /* disable the PLL */ |
Dimitris Papastamos | 6c20c80 | 2010-10-04 09:37:48 +0100 | [diff] [blame] | 397 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1); |
Dimitris Papastamos | 86ce6c9 | 2010-10-04 09:31:42 +0100 | [diff] [blame] | 398 | return 0; |
| 399 | } else { |
| 400 | int ret; |
| 401 | struct pll_div pll_div; |
| 402 | |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 403 | ret = pll_factors(&pll_div, freq_out, freq_in); |
| 404 | if (ret) |
| 405 | return ret; |
Dimitris Papastamos | 86ce6c9 | 2010-10-04 09:31:42 +0100 | [diff] [blame] | 406 | |
| 407 | /* power down the PLL before reprogramming it */ |
Dimitris Papastamos | 6c20c80 | 2010-10-04 09:37:48 +0100 | [diff] [blame] | 408 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1); |
Dimitris Papastamos | 86ce6c9 | 2010-10-04 09:31:42 +0100 | [diff] [blame] | 409 | |
| 410 | if (!freq_in || !freq_out) |
| 411 | return 0; |
| 412 | |
| 413 | /* set PLLN and PRESCALE */ |
| 414 | snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10, |
| 415 | pll_div.n | (pll_div.prescale << 4)); |
| 416 | /* set mclkdiv and freqmode */ |
| 417 | snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8, |
| 418 | pll_div.freqmode | (pll_div.mclkdiv << 3)); |
| 419 | /* set PLLK */ |
| 420 | snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff); |
| 421 | snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff); |
| 422 | snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16); |
| 423 | |
| 424 | /* power up the PLL */ |
Dimitris Papastamos | 6c20c80 | 2010-10-04 09:37:48 +0100 | [diff] [blame] | 425 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0); |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 426 | } |
| 427 | |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int wm8804_set_sysclk(struct snd_soc_dai *dai, |
| 432 | int clk_id, unsigned int freq, int dir) |
| 433 | { |
| 434 | struct snd_soc_codec *codec; |
| 435 | |
| 436 | codec = dai->codec; |
| 437 | |
| 438 | switch (clk_id) { |
| 439 | case WM8804_TX_CLKSRC_MCLK: |
| 440 | if ((freq >= 10000000 && freq <= 14400000) |
| 441 | || (freq >= 16280000 && freq <= 27000000)) |
| 442 | snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80); |
| 443 | else { |
| 444 | dev_err(dai->dev, "OSCCLOCK is not within the " |
| 445 | "recommended range: %uHz\n", freq); |
| 446 | return -EINVAL; |
| 447 | } |
| 448 | break; |
| 449 | case WM8804_TX_CLKSRC_PLL: |
| 450 | snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0); |
| 451 | break; |
| 452 | case WM8804_CLKOUT_SRC_CLK1: |
| 453 | snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0); |
| 454 | break; |
| 455 | case WM8804_CLKOUT_SRC_OSCCLK: |
| 456 | snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8); |
| 457 | break; |
| 458 | default: |
| 459 | dev_err(dai->dev, "Unknown clock source: %d\n", clk_id); |
| 460 | return -EINVAL; |
| 461 | } |
| 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int wm8804_set_clkdiv(struct snd_soc_dai *dai, |
| 467 | int div_id, int div) |
| 468 | { |
| 469 | struct snd_soc_codec *codec; |
| 470 | |
| 471 | codec = dai->codec; |
| 472 | switch (div_id) { |
| 473 | case WM8804_CLKOUT_DIV: |
| 474 | snd_soc_update_bits(codec, WM8804_PLL5, 0x30, |
| 475 | (div & 0x3) << 4); |
| 476 | break; |
| 477 | default: |
| 478 | dev_err(dai->dev, "Unknown clock divider: %d\n", div_id); |
| 479 | return -EINVAL; |
| 480 | } |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static void wm8804_sync_cache(struct snd_soc_codec *codec) |
| 485 | { |
| 486 | short i; |
| 487 | u8 *cache; |
| 488 | |
| 489 | if (!codec->cache_sync) |
| 490 | return; |
| 491 | |
| 492 | codec->cache_only = 0; |
| 493 | cache = codec->reg_cache; |
| 494 | for (i = 0; i < codec->driver->reg_cache_size; i++) { |
| 495 | if (i == WM8804_RST_DEVID1 || cache[i] == wm8804_reg_defs[i]) |
| 496 | continue; |
| 497 | snd_soc_write(codec, i, cache[i]); |
| 498 | } |
| 499 | codec->cache_sync = 0; |
| 500 | } |
| 501 | |
| 502 | static int wm8804_set_bias_level(struct snd_soc_codec *codec, |
| 503 | enum snd_soc_bias_level level) |
| 504 | { |
| 505 | int ret; |
| 506 | struct wm8804_priv *wm8804; |
| 507 | |
| 508 | wm8804 = snd_soc_codec_get_drvdata(codec); |
| 509 | switch (level) { |
| 510 | case SND_SOC_BIAS_ON: |
| 511 | break; |
| 512 | case SND_SOC_BIAS_PREPARE: |
| 513 | /* power up the OSC and the PLL */ |
| 514 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0); |
| 515 | break; |
| 516 | case SND_SOC_BIAS_STANDBY: |
Liam Girdwood | ce6120c | 2010-11-05 15:53:46 +0200 | [diff] [blame] | 517 | if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 518 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies), |
| 519 | wm8804->supplies); |
| 520 | if (ret) { |
| 521 | dev_err(codec->dev, |
| 522 | "Failed to enable supplies: %d\n", |
| 523 | ret); |
| 524 | return ret; |
| 525 | } |
| 526 | wm8804_sync_cache(codec); |
| 527 | } |
| 528 | /* power down the OSC and the PLL */ |
| 529 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9); |
| 530 | break; |
| 531 | case SND_SOC_BIAS_OFF: |
| 532 | /* power down the OSC and the PLL */ |
| 533 | snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9); |
| 534 | regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), |
| 535 | wm8804->supplies); |
| 536 | break; |
| 537 | } |
| 538 | |
Liam Girdwood | ce6120c | 2010-11-05 15:53:46 +0200 | [diff] [blame] | 539 | codec->dapm.bias_level = level; |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | #ifdef CONFIG_PM |
| 544 | static int wm8804_suspend(struct snd_soc_codec *codec, pm_message_t state) |
| 545 | { |
| 546 | wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF); |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | static int wm8804_resume(struct snd_soc_codec *codec) |
| 551 | { |
| 552 | wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| 553 | return 0; |
| 554 | } |
| 555 | #else |
| 556 | #define wm8804_suspend NULL |
| 557 | #define wm8804_resume NULL |
| 558 | #endif |
| 559 | |
| 560 | static int wm8804_remove(struct snd_soc_codec *codec) |
| 561 | { |
| 562 | struct wm8804_priv *wm8804; |
| 563 | int i; |
| 564 | |
| 565 | wm8804 = snd_soc_codec_get_drvdata(codec); |
| 566 | wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF); |
| 567 | |
| 568 | for (i = 0; i < ARRAY_SIZE(wm8804->supplies); ++i) |
| 569 | regulator_unregister_notifier(wm8804->supplies[i].consumer, |
| 570 | &wm8804->disable_nb[i]); |
| 571 | regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies); |
| 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | static int wm8804_probe(struct snd_soc_codec *codec) |
| 576 | { |
| 577 | struct wm8804_priv *wm8804; |
| 578 | int i, id1, id2, ret; |
| 579 | |
| 580 | wm8804 = snd_soc_codec_get_drvdata(codec); |
| 581 | wm8804->codec = codec; |
| 582 | |
Liam Girdwood | ce6120c | 2010-11-05 15:53:46 +0200 | [diff] [blame] | 583 | codec->dapm.idle_bias_off = 1; |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 584 | |
| 585 | ret = snd_soc_codec_set_cache_io(codec, 8, 8, wm8804->control_type); |
| 586 | if (ret < 0) { |
| 587 | dev_err(codec->dev, "Failed to set cache i/o: %d\n", ret); |
| 588 | return ret; |
| 589 | } |
| 590 | |
| 591 | for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) |
| 592 | wm8804->supplies[i].supply = wm8804_supply_names[i]; |
| 593 | |
| 594 | ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8804->supplies), |
| 595 | wm8804->supplies); |
| 596 | if (ret) { |
| 597 | dev_err(codec->dev, "Failed to request supplies: %d\n", ret); |
| 598 | return ret; |
| 599 | } |
| 600 | |
| 601 | wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0; |
| 602 | wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1; |
| 603 | |
| 604 | /* This should really be moved into the regulator core */ |
| 605 | for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) { |
| 606 | ret = regulator_register_notifier(wm8804->supplies[i].consumer, |
| 607 | &wm8804->disable_nb[i]); |
| 608 | if (ret != 0) { |
| 609 | dev_err(codec->dev, |
| 610 | "Failed to register regulator notifier: %d\n", |
| 611 | ret); |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies), |
| 616 | wm8804->supplies); |
| 617 | if (ret) { |
| 618 | dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); |
| 619 | goto err_reg_get; |
| 620 | } |
| 621 | |
| 622 | id1 = snd_soc_read(codec, WM8804_RST_DEVID1); |
| 623 | if (id1 < 0) { |
| 624 | dev_err(codec->dev, "Failed to read device ID: %d\n", id1); |
| 625 | ret = id1; |
| 626 | goto err_reg_enable; |
| 627 | } |
| 628 | |
| 629 | id2 = snd_soc_read(codec, WM8804_DEVID2); |
| 630 | if (id2 < 0) { |
| 631 | dev_err(codec->dev, "Failed to read device ID: %d\n", id2); |
| 632 | ret = id2; |
| 633 | goto err_reg_enable; |
| 634 | } |
| 635 | |
| 636 | id2 = (id2 << 8) | id1; |
| 637 | |
| 638 | if (id2 != ((wm8804_reg_defs[WM8804_DEVID2] << 8) |
| 639 | | wm8804_reg_defs[WM8804_RST_DEVID1])) { |
| 640 | dev_err(codec->dev, "Invalid device ID: %#x\n", id2); |
| 641 | ret = -EINVAL; |
| 642 | goto err_reg_enable; |
| 643 | } |
| 644 | |
Dimitris Papastamos | e595b32 | 2010-10-04 16:28:59 +0100 | [diff] [blame] | 645 | ret = snd_soc_read(codec, WM8804_DEVREV); |
| 646 | if (ret < 0) { |
| 647 | dev_err(codec->dev, "Failed to read device revision: %d\n", |
| 648 | ret); |
| 649 | goto err_reg_enable; |
| 650 | } |
| 651 | dev_info(codec->dev, "revision %c\n", ret + 'A'); |
| 652 | |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 653 | ret = wm8804_reset(codec); |
| 654 | if (ret < 0) { |
| 655 | dev_err(codec->dev, "Failed to issue reset: %d\n", ret); |
| 656 | goto err_reg_enable; |
| 657 | } |
| 658 | |
| 659 | wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
| 660 | |
| 661 | snd_soc_add_controls(codec, wm8804_snd_controls, |
| 662 | ARRAY_SIZE(wm8804_snd_controls)); |
| 663 | return 0; |
| 664 | |
| 665 | err_reg_enable: |
| 666 | regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies); |
| 667 | err_reg_get: |
| 668 | regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies); |
| 669 | return ret; |
| 670 | } |
| 671 | |
| 672 | static struct snd_soc_dai_ops wm8804_dai_ops = { |
| 673 | .hw_params = wm8804_hw_params, |
| 674 | .set_fmt = wm8804_set_fmt, |
| 675 | .set_sysclk = wm8804_set_sysclk, |
| 676 | .set_clkdiv = wm8804_set_clkdiv, |
| 677 | .set_pll = wm8804_set_pll |
| 678 | }; |
| 679 | |
| 680 | #define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \ |
| 681 | SNDRV_PCM_FMTBIT_S24_LE) |
| 682 | |
| 683 | static struct snd_soc_dai_driver wm8804_dai = { |
Dimitris Papastamos | cb13c6b | 2010-10-01 09:12:14 +0100 | [diff] [blame] | 684 | .name = "wm8804-spdif", |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 685 | .playback = { |
| 686 | .stream_name = "Playback", |
| 687 | .channels_min = 2, |
| 688 | .channels_max = 2, |
| 689 | .rates = SNDRV_PCM_RATE_8000_192000, |
| 690 | .formats = WM8804_FORMATS, |
| 691 | }, |
| 692 | .capture = { |
| 693 | .stream_name = "Capture", |
| 694 | .channels_min = 2, |
| 695 | .channels_max = 2, |
| 696 | .rates = SNDRV_PCM_RATE_8000_192000, |
| 697 | .formats = WM8804_FORMATS, |
| 698 | }, |
| 699 | .ops = &wm8804_dai_ops, |
| 700 | .symmetric_rates = 1 |
| 701 | }; |
| 702 | |
| 703 | static struct snd_soc_codec_driver soc_codec_dev_wm8804 = { |
| 704 | .probe = wm8804_probe, |
| 705 | .remove = wm8804_remove, |
| 706 | .suspend = wm8804_suspend, |
| 707 | .resume = wm8804_resume, |
| 708 | .set_bias_level = wm8804_set_bias_level, |
| 709 | .reg_cache_size = ARRAY_SIZE(wm8804_reg_defs), |
| 710 | .reg_word_size = sizeof(u8), |
| 711 | .reg_cache_default = wm8804_reg_defs, |
| 712 | .volatile_register = wm8804_volatile |
| 713 | }; |
| 714 | |
| 715 | #if defined(CONFIG_SPI_MASTER) |
| 716 | static int __devinit wm8804_spi_probe(struct spi_device *spi) |
| 717 | { |
| 718 | struct wm8804_priv *wm8804; |
| 719 | int ret; |
| 720 | |
| 721 | wm8804 = kzalloc(sizeof *wm8804, GFP_KERNEL); |
Dan Carpenter | fe3e2e7 | 2010-10-09 21:31:31 +0200 | [diff] [blame] | 722 | if (!wm8804) |
| 723 | return -ENOMEM; |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 724 | |
| 725 | wm8804->control_type = SND_SOC_SPI; |
| 726 | spi_set_drvdata(spi, wm8804); |
| 727 | |
| 728 | ret = snd_soc_register_codec(&spi->dev, |
| 729 | &soc_codec_dev_wm8804, &wm8804_dai, 1); |
| 730 | if (ret < 0) |
| 731 | kfree(wm8804); |
| 732 | return ret; |
| 733 | } |
| 734 | |
| 735 | static int __devexit wm8804_spi_remove(struct spi_device *spi) |
| 736 | { |
| 737 | snd_soc_unregister_codec(&spi->dev); |
| 738 | kfree(spi_get_drvdata(spi)); |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | static struct spi_driver wm8804_spi_driver = { |
| 743 | .driver = { |
| 744 | .name = "wm8804", |
| 745 | .owner = THIS_MODULE, |
| 746 | }, |
| 747 | .probe = wm8804_spi_probe, |
| 748 | .remove = __devexit_p(wm8804_spi_remove) |
| 749 | }; |
| 750 | #endif |
| 751 | |
| 752 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| 753 | static __devinit int wm8804_i2c_probe(struct i2c_client *i2c, |
| 754 | const struct i2c_device_id *id) |
| 755 | { |
| 756 | struct wm8804_priv *wm8804; |
| 757 | int ret; |
| 758 | |
| 759 | wm8804 = kzalloc(sizeof *wm8804, GFP_KERNEL); |
Dan Carpenter | fe3e2e7 | 2010-10-09 21:31:31 +0200 | [diff] [blame] | 760 | if (!wm8804) |
| 761 | return -ENOMEM; |
Dimitris Papastamos | 33cf45c | 2010-09-29 11:14:56 +0100 | [diff] [blame] | 762 | |
| 763 | wm8804->control_type = SND_SOC_I2C; |
| 764 | i2c_set_clientdata(i2c, wm8804); |
| 765 | |
| 766 | ret = snd_soc_register_codec(&i2c->dev, |
| 767 | &soc_codec_dev_wm8804, &wm8804_dai, 1); |
| 768 | if (ret < 0) |
| 769 | kfree(wm8804); |
| 770 | return ret; |
| 771 | } |
| 772 | |
| 773 | static __devexit int wm8804_i2c_remove(struct i2c_client *client) |
| 774 | { |
| 775 | snd_soc_unregister_codec(&client->dev); |
| 776 | kfree(i2c_get_clientdata(client)); |
| 777 | return 0; |
| 778 | } |
| 779 | |
| 780 | static const struct i2c_device_id wm8804_i2c_id[] = { |
| 781 | { "wm8804", 0 }, |
| 782 | { } |
| 783 | }; |
| 784 | MODULE_DEVICE_TABLE(i2c, wm8804_i2c_id); |
| 785 | |
| 786 | static struct i2c_driver wm8804_i2c_driver = { |
| 787 | .driver = { |
| 788 | .name = "wm8804", |
| 789 | .owner = THIS_MODULE, |
| 790 | }, |
| 791 | .probe = wm8804_i2c_probe, |
| 792 | .remove = __devexit_p(wm8804_i2c_remove), |
| 793 | .id_table = wm8804_i2c_id |
| 794 | }; |
| 795 | #endif |
| 796 | |
| 797 | static int __init wm8804_modinit(void) |
| 798 | { |
| 799 | int ret = 0; |
| 800 | |
| 801 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| 802 | ret = i2c_add_driver(&wm8804_i2c_driver); |
| 803 | if (ret) { |
| 804 | printk(KERN_ERR "Failed to register wm8804 I2C driver: %d\n", |
| 805 | ret); |
| 806 | } |
| 807 | #endif |
| 808 | #if defined(CONFIG_SPI_MASTER) |
| 809 | ret = spi_register_driver(&wm8804_spi_driver); |
| 810 | if (ret != 0) { |
| 811 | printk(KERN_ERR "Failed to register wm8804 SPI driver: %d\n", |
| 812 | ret); |
| 813 | } |
| 814 | #endif |
| 815 | return ret; |
| 816 | } |
| 817 | module_init(wm8804_modinit); |
| 818 | |
| 819 | static void __exit wm8804_exit(void) |
| 820 | { |
| 821 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
| 822 | i2c_del_driver(&wm8804_i2c_driver); |
| 823 | #endif |
| 824 | #if defined(CONFIG_SPI_MASTER) |
| 825 | spi_unregister_driver(&wm8804_spi_driver); |
| 826 | #endif |
| 827 | } |
| 828 | module_exit(wm8804_exit); |
| 829 | |
| 830 | MODULE_DESCRIPTION("ASoC WM8804 driver"); |
| 831 | MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>"); |
| 832 | MODULE_LICENSE("GPL"); |