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Commit 1082e2703a2d91790f9349a6155913a8aa0d0b66

Authored by Wan ZongShun
Committed by Mark Brown
1 parent b6f4bb383d
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

ASoC: NUC900/audio: add nuc900 audio driver support 

Add support for NUC900 AC97

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Showing 8 changed files with 1036 additions and 0 deletions Side-by-side Diff

... ... @@ -30,6 +30,7 @@
30 30 source "sound/soc/davinci/Kconfig"
31 31 source "sound/soc/fsl/Kconfig"
32 32 source "sound/soc/imx/Kconfig"
  33 +source "sound/soc/nuc900/Kconfig"
33 34 source "sound/soc/omap/Kconfig"
34 35 source "sound/soc/pxa/Kconfig"
35 36 source "sound/soc/s3c24xx/Kconfig"
... ... @@ -8,6 +8,7 @@
8 8 obj-$(CONFIG_SND_SOC) += davinci/
9 9 obj-$(CONFIG_SND_SOC) += fsl/
10 10 obj-$(CONFIG_SND_SOC) += imx/
  11 +obj-$(CONFIG_SND_SOC) += nuc900/
11 12 obj-$(CONFIG_SND_SOC) += omap/
12 13 obj-$(CONFIG_SND_SOC) += pxa/
13 14 obj-$(CONFIG_SND_SOC) += s3c24xx/
sound/soc/nuc900/Kconfig
Diff comments   View file @ 1082e27
  1 +##
  2 +## NUC900 series AC97 API
  3 +##
  4 +config SND_SOC_NUC900
  5 + tristate "SoC Audio for NUC900 series"
  6 + depends on ARCH_W90X900
  7 + help
  8 + This option enables support for AC97 mode on the NUC900 SoC.
  9 +
  10 +config SND_SOC_NUC900_AC97
  11 + tristate
  12 + select AC97_BUS
  13 + select SND_AC97_CODEC
  14 + select SND_SOC_AC97_BUS
  15 +
  16 +
  17 +##
  18 +## Boards
  19 +##
  20 +config SND_SOC_NUC900EVB
  21 + tristate "NUC900 AC97 support for demo board"
  22 + depends on SND_SOC_NUC900
  23 + select SND_SOC_NUC900_AC97
  24 + select SND_SOC_AC97_CODEC
  25 + help
  26 + Select this option to enable audio (AC97) on the
  27 + NUC900 demoboard.
sound/soc/nuc900/Makefile
Diff comments   View file @ 1082e27
  1 +# NUC900 series audio
  2 +snd-soc-nuc900-pcm-objs := nuc900-pcm.o
  3 +snd-soc-nuc900-ac97-objs := nuc900-ac97.o
  4 +
  5 +obj-$(CONFIG_SND_SOC_NUC900) += snd-soc-nuc900-pcm.o
  6 +obj-$(CONFIG_SND_SOC_NUC900_AC97) += snd-soc-nuc900-ac97.o
  7 +
  8 +# Boards
  9 +snd-soc-nuc900-audio-objs := nuc900-audio.o
  10 +
  11 +obj-$(CONFIG_SND_SOC_NUC900EVB) += snd-soc-nuc900-audio.o
sound/soc/nuc900/nuc900-ac97.c
Diff comments   View file @ 1082e27
  1 +/*
  2 + * Copyright (c) 2009-2010 Nuvoton technology corporation.
  3 + *
  4 + * Wan ZongShun <mcuos.com@gmail.com>
  5 + *
  6 + * This program is free software; you can redistribute it and/or modify
  7 + * it under the terms of the GNU General Public License as published by
  8 + * the Free Software Foundation;version 2 of the License.
  9 + *
  10 + */
  11 +
  12 +#include <linux/init.h>
  13 +#include <linux/module.h>
  14 +#include <linux/slab.h>
  15 +#include <linux/device.h>
  16 +#include <linux/delay.h>
  17 +#include <linux/mutex.h>
  18 +#include <linux/suspend.h>
  19 +#include <sound/core.h>
  20 +#include <sound/pcm.h>
  21 +#include <sound/initval.h>
  22 +#include <sound/soc.h>
  23 +#include <linux/device.h>
  24 +#include <linux/clk.h>
  25 +
  26 +#include <mach/mfp.h>
  27 +
  28 +#include "nuc900-auido.h"
  29 +
  30 +static DEFINE_MUTEX(ac97_mutex);
  31 +struct nuc900_audio *nuc900_ac97_data;
  32 +
  33 +static int nuc900_checkready(void)
  34 +{
  35 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  36 +
  37 + if (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS0) & CODEC_READY))
  38 + return -EPERM;
  39 +
  40 + return 0;
  41 +}
  42 +
  43 +/* AC97 controller reads codec register */
  44 +static unsigned short nuc900_ac97_read(struct snd_ac97 *ac97,
  45 + unsigned short reg)
  46 +{
  47 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  48 + unsigned long timeout = 0x10000, val;
  49 +
  50 + mutex_lock(&ac97_mutex);
  51 +
  52 + val = nuc900_checkready();
  53 + if (!!val) {
  54 + dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
  55 + goto out;
  56 + }
  57 +
  58 + /* set the R_WB bit and write register index */
  59 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, R_WB | reg);
  60 +
  61 + /* set the valid frame bit and valid slots */
  62 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
  63 + val |= (VALID_FRAME | SLOT1_VALID);
  64 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
  65 +
  66 + udelay(100);
  67 +
  68 + /* polling the AC_R_FINISH */
  69 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
  70 + val &= AC_R_FINISH;
  71 + while (!val && timeout--)
  72 + mdelay(1);
  73 +
  74 + if (!timeout) {
  75 + dev_err(nuc900_audio->dev, "AC97 read register time out !\n");
  76 + val = -EPERM;
  77 + goto out;
  78 + }
  79 +
  80 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0) ;
  81 + val &= ~SLOT1_VALID;
  82 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
  83 +
  84 + if (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS1) >> 2 != reg) {
  85 + dev_err(nuc900_audio->dev,
  86 + "R_INDEX of REG_ACTL_ACIS1 not match!\n");
  87 + }
  88 +
  89 + udelay(100);
  90 + val = (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS2) & 0xFFFF);
  91 +
  92 +out:
  93 + mutex_unlock(&ac97_mutex);
  94 + return val;
  95 +}
  96 +
  97 +/* AC97 controller writes to codec register */
  98 +static void nuc900_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
  99 + unsigned short val)
  100 +{
  101 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  102 + unsigned long tmp, timeout = 0x10000;
  103 +
  104 + mutex_lock(&ac97_mutex);
  105 +
  106 + tmp = nuc900_checkready();
  107 + if (!!tmp)
  108 + dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
  109 +
  110 + /* clear the R_WB bit and write register index */
  111 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, reg);
  112 +
  113 + /* write register value */
  114 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS2, val);
  115 +
  116 + /* set the valid frame bit and valid slots */
  117 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
  118 + tmp |= SLOT1_VALID | SLOT2_VALID | VALID_FRAME;
  119 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
  120 +
  121 + udelay(100);
  122 +
  123 + /* polling the AC_W_FINISH */
  124 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
  125 + tmp &= AC_W_FINISH;
  126 + while (tmp && timeout--)
  127 + mdelay(1);
  128 +
  129 + if (!timeout)
  130 + dev_err(nuc900_audio->dev, "AC97 write register time out !\n");
  131 +
  132 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
  133 + tmp &= ~(SLOT1_VALID | SLOT2_VALID);
  134 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
  135 +
  136 + mutex_unlock(&ac97_mutex);
  137 +
  138 +}
  139 +
  140 +static void nuc900_ac97_warm_reset(struct snd_ac97 *ac97)
  141 +{
  142 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  143 + unsigned long val;
  144 +
  145 + mutex_lock(&ac97_mutex);
  146 +
  147 + /* warm reset AC 97 */
  148 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
  149 + val |= AC_W_RES;
  150 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
  151 +
  152 + udelay(1000);
  153 +
  154 + val = nuc900_checkready();
  155 + if (!!val)
  156 + dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
  157 +
  158 + mutex_unlock(&ac97_mutex);
  159 +}
  160 +
  161 +static void nuc900_ac97_cold_reset(struct snd_ac97 *ac97)
  162 +{
  163 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  164 + unsigned long val;
  165 +
  166 + mutex_lock(&ac97_mutex);
  167 +
  168 + /* reset Audio Controller */
  169 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  170 + val |= ACTL_RESET_BIT;
  171 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  172 +
  173 + udelay(1000);
  174 +
  175 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  176 + val &= (~ACTL_RESET_BIT);
  177 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  178 +
  179 + udelay(1000);
  180 +
  181 + /* reset AC-link interface */
  182 +
  183 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  184 + val |= AC_RESET;
  185 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  186 +
  187 + udelay(1000);
  188 +
  189 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  190 + val &= ~AC_RESET;
  191 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  192 +
  193 + udelay(1000);
  194 +
  195 + /* cold reset AC 97 */
  196 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
  197 + val |= AC_C_RES;
  198 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
  199 +
  200 + udelay(1000);
  201 +
  202 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
  203 + val &= (~AC_C_RES);
  204 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
  205 +
  206 + udelay(1000);
  207 +
  208 + mutex_unlock(&ac97_mutex);
  209 +
  210 +}
  211 +
  212 +/* AC97 controller operations */
  213 +struct snd_ac97_bus_ops soc_ac97_ops = {
  214 + .read = nuc900_ac97_read,
  215 + .write = nuc900_ac97_write,
  216 + .reset = nuc900_ac97_cold_reset,
  217 + .warm_reset = nuc900_ac97_warm_reset,
  218 +}
  219 +EXPORT_SYMBOL_GPL(soc_ac97_ops);
  220 +
  221 +static int nuc900_ac97_trigger(struct snd_pcm_substream *substream,
  222 + int cmd, struct snd_soc_dai *dai)
  223 +{
  224 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  225 + int ret, stype = SUBSTREAM_TYPE(substream);
  226 + unsigned long val, tmp;
  227 +
  228 + ret = 0;
  229 +
  230 + switch (cmd) {
  231 + case SNDRV_PCM_TRIGGER_START:
  232 + case SNDRV_PCM_TRIGGER_RESUME:
  233 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  234 + if (PCM_TX == stype) {
  235 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
  236 + tmp |= (SLOT3_VALID | SLOT4_VALID | VALID_FRAME);
  237 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
  238 +
  239 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
  240 + tmp |= (P_DMA_END_IRQ | P_DMA_MIDDLE_IRQ);
  241 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, tmp);
  242 + val |= AC_PLAY;
  243 + } else {
  244 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
  245 + tmp |= (R_DMA_END_IRQ | R_DMA_MIDDLE_IRQ);
  246 +
  247 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, tmp);
  248 + val |= AC_RECORD;
  249 + }
  250 +
  251 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  252 +
  253 + break;
  254 + case SNDRV_PCM_TRIGGER_STOP:
  255 + case SNDRV_PCM_TRIGGER_SUSPEND:
  256 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  257 + if (PCM_TX == stype) {
  258 + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
  259 + tmp &= ~(SLOT3_VALID | SLOT4_VALID);
  260 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
  261 +
  262 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, RESET_PRSR);
  263 + val &= ~AC_PLAY;
  264 + } else {
  265 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, RESET_PRSR);
  266 + val &= ~AC_RECORD;
  267 + }
  268 +
  269 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  270 +
  271 + break;
  272 + default:
  273 + ret = -EINVAL;
  274 + }
  275 +
  276 + return ret;
  277 +}
  278 +
  279 +static int nuc900_ac97_probe(struct platform_device *pdev,
  280 + struct snd_soc_dai *dai)
  281 +{
  282 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  283 + unsigned long val;
  284 +
  285 + mutex_lock(&ac97_mutex);
  286 +
  287 + /* enable unit clock */
  288 + clk_enable(nuc900_audio->clk);
  289 +
  290 + /* enable audio controller and AC-link interface */
  291 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
  292 + val |= (IIS_AC_PIN_SEL | ACLINK_EN);
  293 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
  294 +
  295 + mutex_unlock(&ac97_mutex);
  296 +
  297 + return 0;
  298 +}
  299 +
  300 +static void nuc900_ac97_remove(struct platform_device *pdev,
  301 + struct snd_soc_dai *dai)
  302 +{
  303 + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
  304 +
  305 + clk_disable(nuc900_audio->clk);
  306 +}
  307 +
  308 +static struct snd_soc_dai_ops nuc900_ac97_dai_ops = {
  309 + .trigger = nuc900_ac97_trigger,
  310 +};
  311 +
  312 +struct snd_soc_dai nuc900_ac97_dai = {
  313 + .name = "nuc900-ac97",
  314 + .probe = nuc900_ac97_probe,
  315 + .remove = nuc900_ac97_remove,
  316 + .ac97_control = 1,
  317 + .playback = {
  318 + .rates = SNDRV_PCM_RATE_8000_48000,
  319 + .formats = SNDRV_PCM_FMTBIT_S16_LE,
  320 + .channels_min = 1,
  321 + .channels_max = 2,
  322 + },
  323 + .capture = {
  324 + .rates = SNDRV_PCM_RATE_8000_48000,
  325 + .formats = SNDRV_PCM_FMTBIT_S16_LE,
  326 + .channels_min = 1,
  327 + .channels_max = 2,
  328 + },
  329 + .ops = &nuc900_ac97_dai_ops,
  330 +}
  331 +EXPORT_SYMBOL_GPL(nuc900_ac97_dai);
  332 +
  333 +static int __devinit nuc900_ac97_drvprobe(struct platform_device *pdev)
  334 +{
  335 + struct nuc900_audio *nuc900_audio;
  336 + int ret;
  337 +
  338 + if (nuc900_ac97_data)
  339 + return -EBUSY;
  340 +
  341 + nuc900_audio = kzalloc(sizeof(struct nuc900_audio), GFP_KERNEL);
  342 + if (!nuc900_audio)
  343 + return -ENOMEM;
  344 +
  345 + spin_lock_init(&nuc900_audio->lock);
  346 +
  347 + nuc900_audio->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  348 + if (!nuc900_audio->res) {
  349 + ret = -ENODEV;
  350 + goto out0;
  351 + }
  352 +
  353 + if (!request_mem_region(nuc900_audio->res->start,
  354 + resource_size(nuc900_audio->res), pdev->name)) {
  355 + ret = -EBUSY;
  356 + goto out0;
  357 + }
  358 +
  359 + nuc900_audio->mmio = ioremap(nuc900_audio->res->start,
  360 + resource_size(nuc900_audio->res));
  361 + if (!nuc900_audio->mmio) {
  362 + ret = -ENOMEM;
  363 + goto out1;
  364 + }
  365 +
  366 + nuc900_audio->clk = clk_get(&pdev->dev, NULL);
  367 + if (IS_ERR(nuc900_audio->clk)) {
  368 + ret = PTR_ERR(nuc900_audio->clk);
  369 + goto out2;
  370 + }
  371 +
  372 + nuc900_audio->irq_num = platform_get_irq(pdev, 0);
  373 + if (!nuc900_audio->irq_num) {
  374 + ret = -EBUSY;
  375 + goto out2;
  376 + }
  377 +
  378 + nuc900_ac97_data = nuc900_audio;
  379 +
  380 + nuc900_audio->dev = nuc900_ac97_dai.dev = &pdev->dev;
  381 +
  382 + ret = snd_soc_register_dai(&nuc900_ac97_dai);
  383 + if (ret)
  384 + goto out3;
  385 +
  386 + mfp_set_groupg(nuc900_audio->dev); /* enbale ac97 multifunction pin*/
  387 +
  388 + return 0;
  389 +
  390 +out3:
  391 + clk_put(nuc900_audio->clk);
  392 +out2:
  393 + iounmap(nuc900_audio->mmio);
  394 +out1:
  395 + release_mem_region(nuc900_audio->res->start,
  396 + resource_size(nuc900_audio->res));
  397 +out0:
  398 + kfree(nuc900_audio);
  399 + return ret;
  400 +}
  401 +
  402 +static int __devexit nuc900_ac97_drvremove(struct platform_device *pdev)
  403 +{
  404 +
  405 + snd_soc_unregister_dai(&nuc900_ac97_dai);
  406 +
  407 + clk_put(nuc900_ac97_data->clk);
  408 + iounmap(nuc900_ac97_data->mmio);
  409 + release_mem_region(nuc900_ac97_data->res->start,
  410 + resource_size(nuc900_ac97_data->res));
  411 +
  412 + nuc900_ac97_data = NULL;
  413 +
  414 + return 0;
  415 +}
  416 +
  417 +static struct platform_driver nuc900_ac97_driver = {
  418 + .driver = {
  419 + .name = "nuc900-audio",
  420 + .owner = THIS_MODULE,
  421 + },
  422 + .probe = nuc900_ac97_drvprobe,
  423 + .remove = __devexit_p(nuc900_ac97_drvremove),
  424 +};
  425 +
  426 +static int __init nuc900_ac97_init(void)
  427 +{
  428 + return platform_driver_register(&nuc900_ac97_driver);
  429 +}
  430 +
  431 +static void __exit nuc900_ac97_exit(void)
  432 +{
  433 + platform_driver_unregister(&nuc900_ac97_driver);
  434 +}
  435 +
  436 +module_init(nuc900_ac97_init);
  437 +module_exit(nuc900_ac97_exit);
  438 +
  439 +MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
  440 +MODULE_DESCRIPTION("NUC900 AC97 SoC driver!");
  441 +MODULE_LICENSE("GPL");
  442 +MODULE_ALIAS("platform:nuc900-ac97");
sound/soc/nuc900/nuc900-audio.c
Diff comments   View file @ 1082e27
  1 +/*
  2 + * Copyright (c) 2010 Nuvoton technology corporation.
  3 + *
  4 + * Wan ZongShun <mcuos.com@gmail.com>
  5 + *
  6 + * This program is free software; you can redistribute it and/or modify
  7 + * it under the terms of the GNU General Public License as published by
  8 + * the Free Software Foundation;version 2 of the License.
  9 + *
  10 + */
  11 +
  12 +#include <linux/module.h>
  13 +#include <linux/moduleparam.h>
  14 +#include <linux/timer.h>
  15 +#include <linux/interrupt.h>
  16 +#include <linux/platform_device.h>
  17 +
  18 +#include <sound/core.h>
  19 +#include <sound/pcm.h>
  20 +#include <sound/soc.h>
  21 +#include <sound/soc-dapm.h>
  22 +
  23 +#include "../codecs/ac97.h"
  24 +#include "nuc900-auido.h"
  25 +
  26 +static struct snd_soc_dai_link nuc900evb_ac97_dai = {
  27 + .name = "AC97",
  28 + .stream_name = "AC97 HiFi",
  29 + .cpu_dai = &nuc900_ac97_dai,
  30 + .codec_dai = &ac97_dai,
  31 +};
  32 +
  33 +static struct snd_soc_card nuc900evb_audio_machine = {
  34 + .name = "NUC900EVB_AC97",
  35 + .dai_link = &nuc900evb_ac97_dai,
  36 + .num_links = 1,
  37 + .platform = &nuc900_soc_platform,
  38 +};
  39 +
  40 +static struct snd_soc_device nuc900evb_ac97_devdata = {
  41 + .card = &nuc900evb_audio_machine,
  42 + .codec_dev = &soc_codec_dev_ac97,
  43 +};
  44 +
  45 +static struct platform_device *nuc900evb_asoc_dev;
  46 +
  47 +static int __init nuc900evb_audio_init(void)
  48 +{
  49 + int ret;
  50 +
  51 + ret = -ENOMEM;
  52 + nuc900evb_asoc_dev = platform_device_alloc("soc-audio", -1);
  53 + if (!nuc900evb_asoc_dev)
  54 + goto out;
  55 +
  56 + /* nuc900 board audio device */
  57 + platform_set_drvdata(nuc900evb_asoc_dev, &nuc900evb_ac97_devdata);
  58 +
  59 + nuc900evb_ac97_devdata.dev = &nuc900evb_asoc_dev->dev;
  60 + ret = platform_device_add(nuc900evb_asoc_dev);
  61 +
  62 + if (ret) {
  63 + platform_device_put(nuc900evb_asoc_dev);
  64 + nuc900evb_asoc_dev = NULL;
  65 + }
  66 +
  67 +out:
  68 + return ret;
  69 +}
  70 +
  71 +static void __exit nuc900evb_audio_exit(void)
  72 +{
  73 + platform_device_unregister(nuc900evb_asoc_dev);
  74 +}
  75 +
  76 +module_init(nuc900evb_audio_init);
  77 +module_exit(nuc900evb_audio_exit);
  78 +
  79 +MODULE_LICENSE("GPL");
  80 +MODULE_DESCRIPTION("NUC900 Series ASoC audio support");
  81 +MODULE_AUTHOR("Wan ZongShun");
sound/soc/nuc900/nuc900-auido.h
Diff comments   View file @ 1082e27
  1 +/*
  2 + * Copyright (c) 2010 Nuvoton technology corporation.
  3 + *
  4 + * Wan ZongShun <mcuos.com@gmail.com>
  5 + *
  6 + * This program is free software; you can redistribute it and/or modify
  7 + * it under the terms of the GNU General Public License as published by
  8 + * the Free Software Foundation;version 2 of the License.
  9 + *
  10 + */
  11 +
  12 +#ifndef _NUC900_AUDIO_H
  13 +#define _NUC900_AUDIO_H
  14 +
  15 +#include <linux/io.h>
  16 +
  17 +/* Audio Control Registers */
  18 +#define ACTL_CON 0x00
  19 +#define ACTL_RESET 0x04
  20 +#define ACTL_RDSTB 0x08
  21 +#define ACTL_RDST_LENGTH 0x0C
  22 +#define ACTL_RDSTC 0x10
  23 +#define ACTL_RSR 0x14
  24 +#define ACTL_PDSTB 0x18
  25 +#define ACTL_PDST_LENGTH 0x1C
  26 +#define ACTL_PDSTC 0x20
  27 +#define ACTL_PSR 0x24
  28 +#define ACTL_IISCON 0x28
  29 +#define ACTL_ACCON 0x2C
  30 +#define ACTL_ACOS0 0x30
  31 +#define ACTL_ACOS1 0x34
  32 +#define ACTL_ACOS2 0x38
  33 +#define ACTL_ACIS0 0x3C
  34 +#define ACTL_ACIS1 0x40
  35 +#define ACTL_ACIS2 0x44
  36 +#define ACTL_COUNTER 0x48
  37 +
  38 +/* bit definition of REG_ACTL_CON register */
  39 +#define R_DMA_IRQ 0x1000
  40 +#define T_DMA_IRQ 0x0800
  41 +#define IIS_AC_PIN_SEL 0x0100
  42 +#define FIFO_TH 0x0080
  43 +#define ADC_EN 0x0010
  44 +#define M80_EN 0x0008
  45 +#define ACLINK_EN 0x0004
  46 +#define IIS_EN 0x0002
  47 +
  48 +/* bit definition of REG_ACTL_RESET register */
  49 +#define W5691_PLAY 0x20000
  50 +#define ACTL_RESET_BIT 0x10000
  51 +#define RECORD_RIGHT_CHNNEL 0x08000
  52 +#define RECORD_LEFT_CHNNEL 0x04000
  53 +#define PLAY_RIGHT_CHNNEL 0x02000
  54 +#define PLAY_LEFT_CHNNEL 0x01000
  55 +#define DAC_PLAY 0x00800
  56 +#define ADC_RECORD 0x00400
  57 +#define M80_PLAY 0x00200
  58 +#define AC_RECORD 0x00100
  59 +#define AC_PLAY 0x00080
  60 +#define IIS_RECORD 0x00040
  61 +#define IIS_PLAY 0x00020
  62 +#define DAC_RESET 0x00010
  63 +#define ADC_RESET 0x00008
  64 +#define M80_RESET 0x00004
  65 +#define AC_RESET 0x00002
  66 +#define IIS_RESET 0x00001
  67 +
  68 +/* bit definition of REG_ACTL_ACCON register */
  69 +#define AC_BCLK_PU_EN 0x20
  70 +#define AC_R_FINISH 0x10
  71 +#define AC_W_FINISH 0x08
  72 +#define AC_W_RES 0x04
  73 +#define AC_C_RES 0x02
  74 +
  75 +/* bit definition of ACTL_RSR register */
  76 +#define R_FIFO_EMPTY 0x04
  77 +#define R_DMA_END_IRQ 0x02
  78 +#define R_DMA_MIDDLE_IRQ 0x01
  79 +
  80 +/* bit definition of ACTL_PSR register */
  81 +#define P_FIFO_EMPTY 0x04
  82 +#define P_DMA_END_IRQ 0x02
  83 +#define P_DMA_MIDDLE_IRQ 0x01
  84 +
  85 +/* bit definition of ACTL_ACOS0 register */
  86 +#define SLOT1_VALID 0x01
  87 +#define SLOT2_VALID 0x02
  88 +#define SLOT3_VALID 0x04
  89 +#define SLOT4_VALID 0x08
  90 +#define VALID_FRAME 0x10
  91 +
  92 +/* bit definition of ACTL_ACOS1 register */
  93 +#define R_WB 0x80
  94 +
  95 +#define CODEC_READY 0x10
  96 +#define RESET_PRSR 0x00
  97 +#define AUDIO_WRITE(addr, val) __raw_writel(val, addr)
  98 +#define AUDIO_READ(addr) __raw_readl(addr)
  99 +#define PCM_TX 0
  100 +#define PCM_RX 1
  101 +#define SUBSTREAM_TYPE(substream) \
  102 + ((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
  103 +
  104 +struct nuc900_audio {
  105 + void __iomem *mmio;
  106 + spinlock_t lock;
  107 + dma_addr_t dma_addr[2];
  108 + unsigned long buffersize[2];
  109 + unsigned long irq_num;
  110 + struct snd_pcm_substream *substream;
  111 + struct resource *res;
  112 + struct clk *clk;
  113 + struct device *dev;
  114 +
  115 +};
  116 +
  117 +extern struct nuc900_audio *nuc900_ac97_data;
  118 +extern struct snd_soc_dai nuc900_ac97_dai;
  119 +extern struct snd_soc_platform nuc900_soc_platform;
  120 +
  121 +#endif /*end _NUC900_AUDIO_H */
sound/soc/nuc900/nuc900-pcm.c
Diff comments   View file @ 1082e27
  1 +/*
  2 + * Copyright (c) 2010 Nuvoton technology corporation.
  3 + *
  4 + * Wan ZongShun <mcuos.com@gmail.com>
  5 + *
  6 + * This program is free software; you can redistribute it and/or modify
  7 + * it under the terms of the GNU General Public License as published by
  8 + * the Free Software Foundation;version 2 of the License.
  9 + *
  10 + */
  11 +
  12 +#include <linux/module.h>
  13 +#include <linux/init.h>
  14 +#include <linux/io.h>
  15 +#include <linux/platform_device.h>
  16 +#include <linux/slab.h>
  17 +#include <linux/dma-mapping.h>
  18 +
  19 +#include <sound/core.h>
  20 +#include <sound/pcm.h>
  21 +#include <sound/pcm_params.h>
  22 +#include <sound/soc.h>
  23 +
  24 +#include <mach/hardware.h>
  25 +
  26 +#include "nuc900-auido.h"
  27 +
  28 +static const struct snd_pcm_hardware nuc900_pcm_hardware = {
  29 + .info = SNDRV_PCM_INFO_INTERLEAVED |
  30 + SNDRV_PCM_INFO_BLOCK_TRANSFER |
  31 + SNDRV_PCM_INFO_MMAP |
  32 + SNDRV_PCM_INFO_MMAP_VALID |
  33 + SNDRV_PCM_INFO_PAUSE |
  34 + SNDRV_PCM_INFO_RESUME,
  35 + .formats = SNDRV_PCM_FMTBIT_S16_LE,
  36 + .channels_min = 1,
  37 + .channels_max = 2,
  38 + .buffer_bytes_max = 4*1024,
  39 + .period_bytes_min = 1*1024,
  40 + .period_bytes_max = 4*1024,
  41 + .periods_min = 1,
  42 + .periods_max = 1024,
  43 +};
  44 +
  45 +static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
  46 + struct snd_pcm_hw_params *params)
  47 +{
  48 + struct snd_pcm_runtime *runtime = substream->runtime;
  49 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  50 + unsigned long flags, stype = SUBSTREAM_TYPE(substream);
  51 + int ret = 0;
  52 +
  53 + spin_lock_irqsave(&nuc900_audio->lock, flags);
  54 +
  55 + ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
  56 + if (ret < 0)
  57 + return ret;
  58 +
  59 + nuc900_audio->substream = substream;
  60 + nuc900_audio->dma_addr[stype] = runtime->dma_addr;
  61 + nuc900_audio->buffersize[stype] = params_buffer_bytes(params);
  62 +
  63 + spin_unlock_irqrestore(&nuc900_audio->lock, flags);
  64 +
  65 + return ret;
  66 +}
  67 +
  68 +static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
  69 + dma_addr_t dma_addr, size_t count)
  70 +{
  71 + struct snd_pcm_runtime *runtime = substream->runtime;
  72 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  73 + void __iomem *mmio_addr, *mmio_len;
  74 +
  75 + if (SUBSTREAM_TYPE(substream) == PCM_TX) {
  76 + mmio_addr = nuc900_audio->mmio + ACTL_PDSTB;
  77 + mmio_len = nuc900_audio->mmio + ACTL_PDST_LENGTH;
  78 + } else {
  79 + mmio_addr = nuc900_audio->mmio + ACTL_RDSTB;
  80 + mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
  81 + }
  82 +
  83 + AUDIO_WRITE(mmio_addr, dma_addr);
  84 + AUDIO_WRITE(mmio_len, count);
  85 +}
  86 +
  87 +static void nuc900_dma_start(struct snd_pcm_substream *substream)
  88 +{
  89 + struct snd_pcm_runtime *runtime = substream->runtime;
  90 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  91 + unsigned long val;
  92 +
  93 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
  94 + val |= (T_DMA_IRQ | R_DMA_IRQ);
  95 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
  96 +}
  97 +
  98 +static void nuc900_dma_stop(struct snd_pcm_substream *substream)
  99 +{
  100 + struct snd_pcm_runtime *runtime = substream->runtime;
  101 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  102 + unsigned long val;
  103 +
  104 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
  105 + val &= ~(T_DMA_IRQ | R_DMA_IRQ);
  106 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
  107 +}
  108 +
  109 +static irqreturn_t nuc900_dma_interrupt(int irq, void *dev_id)
  110 +{
  111 + struct snd_pcm_substream *substream = dev_id;
  112 + struct nuc900_audio *nuc900_audio = substream->runtime->private_data;
  113 + unsigned long val;
  114 +
  115 + spin_lock(&nuc900_audio->lock);
  116 +
  117 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
  118 +
  119 + if (val & R_DMA_IRQ) {
  120 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | R_DMA_IRQ);
  121 +
  122 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
  123 +
  124 + if (val & R_DMA_MIDDLE_IRQ) {
  125 + val |= R_DMA_MIDDLE_IRQ;
  126 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
  127 + }
  128 +
  129 + if (val & R_DMA_END_IRQ) {
  130 + val |= R_DMA_END_IRQ;
  131 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
  132 + }
  133 + } else if (val & T_DMA_IRQ) {
  134 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | T_DMA_IRQ);
  135 +
  136 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
  137 +
  138 + if (val & P_DMA_MIDDLE_IRQ) {
  139 + val |= P_DMA_MIDDLE_IRQ;
  140 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
  141 + }
  142 +
  143 + if (val & P_DMA_END_IRQ) {
  144 + val |= P_DMA_END_IRQ;
  145 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
  146 + }
  147 + } else {
  148 + dev_err(nuc900_audio->dev, "Wrong DMA interrupt status!\n");
  149 + spin_unlock(&nuc900_audio->lock);
  150 + return IRQ_HANDLED;
  151 + }
  152 +
  153 + spin_unlock(&nuc900_audio->lock);
  154 +
  155 + snd_pcm_period_elapsed(substream);
  156 +
  157 + return IRQ_HANDLED;
  158 +}
  159 +
  160 +static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)
  161 +{
  162 + snd_pcm_lib_free_pages(substream);
  163 + return 0;
  164 +}
  165 +
  166 +static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
  167 +{
  168 + struct snd_pcm_runtime *runtime = substream->runtime;
  169 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  170 + unsigned long flags, val, stype = SUBSTREAM_TYPE(substream);;
  171 +
  172 + spin_lock_irqsave(&nuc900_audio->lock, flags);
  173 +
  174 + nuc900_update_dma_register(substream,
  175 + nuc900_audio->dma_addr[stype], nuc900_audio->buffersize[stype]);
  176 +
  177 + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
  178 +
  179 + switch (runtime->channels) {
  180 + case 1:
  181 + if (PCM_TX == stype) {
  182 + val &= ~(PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
  183 + val |= PLAY_RIGHT_CHNNEL;
  184 + } else {
  185 + val &= ~(RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
  186 + val |= RECORD_RIGHT_CHNNEL;
  187 + }
  188 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  189 + break;
  190 + case 2:
  191 + if (PCM_TX == stype)
  192 + val |= (PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
  193 + else
  194 + val |= (RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
  195 + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
  196 + break;
  197 + default:
  198 + return -EINVAL;
  199 + }
  200 + spin_unlock_irqrestore(&nuc900_audio->lock, flags);
  201 + return 0;
  202 +}
  203 +
  204 +static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)
  205 +{
  206 + int ret = 0;
  207 +
  208 + switch (cmd) {
  209 + case SNDRV_PCM_TRIGGER_START:
  210 + case SNDRV_PCM_TRIGGER_RESUME:
  211 + nuc900_dma_start(substream);
  212 + break;
  213 +
  214 + case SNDRV_PCM_TRIGGER_STOP:
  215 + case SNDRV_PCM_TRIGGER_SUSPEND:
  216 + nuc900_dma_stop(substream);
  217 + break;
  218 +
  219 + default:
  220 + ret = -EINVAL;
  221 + break;
  222 + }
  223 +
  224 + return ret;
  225 +}
  226 +
  227 +int nuc900_dma_getposition(struct snd_pcm_substream *substream,
  228 + dma_addr_t *src, dma_addr_t *dst)
  229 +{
  230 + struct snd_pcm_runtime *runtime = substream->runtime;
  231 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  232 +
  233 + if (src != NULL)
  234 + *src = AUDIO_READ(nuc900_audio->mmio + ACTL_PDSTC);
  235 +
  236 + if (dst != NULL)
  237 + *dst = AUDIO_READ(nuc900_audio->mmio + ACTL_RDSTC);
  238 +
  239 + return 0;
  240 +}
  241 +
  242 +static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)
  243 +{
  244 + struct snd_pcm_runtime *runtime = substream->runtime;
  245 + dma_addr_t src, dst;
  246 + unsigned long res;
  247 +
  248 + nuc900_dma_getposition(substream, &src, &dst);
  249 +
  250 + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
  251 + res = dst - runtime->dma_addr;
  252 + else
  253 + res = src - runtime->dma_addr;
  254 +
  255 + return bytes_to_frames(substream->runtime, res);
  256 +}
  257 +
  258 +static int nuc900_dma_open(struct snd_pcm_substream *substream)
  259 +{
  260 + struct snd_pcm_runtime *runtime = substream->runtime;
  261 + struct nuc900_audio *nuc900_audio;
  262 +
  263 + snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);
  264 +
  265 + nuc900_audio = nuc900_ac97_data;
  266 +
  267 + if (request_irq(nuc900_audio->irq_num, nuc900_dma_interrupt,
  268 + IRQF_DISABLED, "nuc900-dma", substream))
  269 + return -EBUSY;
  270 +
  271 + runtime->private_data = nuc900_audio;
  272 +
  273 + return 0;
  274 +}
  275 +
  276 +static int nuc900_dma_close(struct snd_pcm_substream *substream)
  277 +{
  278 + struct snd_pcm_runtime *runtime = substream->runtime;
  279 + struct nuc900_audio *nuc900_audio = runtime->private_data;
  280 +
  281 + free_irq(nuc900_audio->irq_num, substream);
  282 +
  283 + return 0;
  284 +}
  285 +
  286 +static int nuc900_dma_mmap(struct snd_pcm_substream *substream,
  287 + struct vm_area_struct *vma)
  288 +{
  289 + struct snd_pcm_runtime *runtime = substream->runtime;
  290 +
  291 + return dma_mmap_writecombine(substream->pcm->card->dev, vma,
  292 + runtime->dma_area,
  293 + runtime->dma_addr,
  294 + runtime->dma_bytes);
  295 +}
  296 +
  297 +static struct snd_pcm_ops nuc900_dma_ops = {
  298 + .open = nuc900_dma_open,
  299 + .close = nuc900_dma_close,
  300 + .ioctl = snd_pcm_lib_ioctl,
  301 + .hw_params = nuc900_dma_hw_params,
  302 + .hw_free = nuc900_dma_hw_free,
  303 + .prepare = nuc900_dma_prepare,
  304 + .trigger = nuc900_dma_trigger,
  305 + .pointer = nuc900_dma_pointer,
  306 + .mmap = nuc900_dma_mmap,
  307 +};
  308 +
  309 +static void nuc900_dma_free_dma_buffers(struct snd_pcm *pcm)
  310 +{
  311 + snd_pcm_lib_preallocate_free_for_all(pcm);
  312 +}
  313 +
  314 +static u64 nuc900_pcm_dmamask = DMA_BIT_MASK(32);
  315 +static int nuc900_dma_new(struct snd_card *card,
  316 + struct snd_soc_dai *dai, struct snd_pcm *pcm)
  317 +{
  318 + if (!card->dev->dma_mask)
  319 + card->dev->dma_mask = &nuc900_pcm_dmamask;
  320 + if (!card->dev->coherent_dma_mask)
  321 + card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
  322 +
  323 + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
  324 + card->dev, 4 * 1024, (4 * 1024) - 1);
  325 +
  326 + return 0;
  327 +}
  328 +
  329 +struct snd_soc_platform nuc900_soc_platform = {
  330 + .name = "nuc900-dma",
  331 + .pcm_ops = &nuc900_dma_ops,
  332 + .pcm_new = nuc900_dma_new,
  333 + .pcm_free = nuc900_dma_free_dma_buffers,
  334 +}
  335 +EXPORT_SYMBOL_GPL(nuc900_soc_platform);
  336 +
  337 +static int __init nuc900_soc_platform_init(void)
  338 +{
  339 + return snd_soc_register_platform(&nuc900_soc_platform);
  340 +}
  341 +
  342 +static void __exit nuc900_soc_platform_exit(void)
  343 +{
  344 + snd_soc_unregister_platform(&nuc900_soc_platform);
  345 +}
  346 +
  347 +module_init(nuc900_soc_platform_init);
  348 +module_exit(nuc900_soc_platform_exit);
  349 +
  350 +MODULE_AUTHOR("Wan ZongShun, <mcuos.com@gmail.com>");
  351 +MODULE_DESCRIPTION("nuc900 Audio DMA module");
  352 +MODULE_LICENSE("GPL");