sound/soc/s3c24xx/s3c2443-ac97.c

   1 /*
   2  * s3c2443-ac97.c  --  ALSA Soc Audio Layer
   3  *
   4  * (c) 2007 Wolfson Microelectronics PLC.
   5  * Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
   6  *
   7  *  Copyright (C) 2005, Sean Choi <sh428.choi@samsung.com>
   8  *  All rights reserved.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2 as
  12  *  published by the Free Software Foundation.
  13  *
  14  *  Revision history
  15  *      21st Mar 2007   Initial Version
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/wait.h>
  23 #include <linux/delay.h>
  24 #include <linux/clk.h>
  25
  26 #include <sound/driver.h>
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/ac97_codec.h>
  30 #include <sound/initval.h>
  31 #include <sound/soc.h>
  32
  33 #include <asm/hardware.h>
  34 #include <asm/io.h>
  35 #include <asm/arch/regs-ac97.h>
  36 #include <asm/arch/regs-gpio.h>
  37 #include <asm/arch/regs-clock.h>
  38 #include <asm/arch/audio.h>
  39 #include <asm/dma.h>
  40 #include <asm/arch/dma.h>
  41
  42 #include "s3c24xx-pcm.h"
  43 #include "s3c24xx-ac97.h"
  44
  45 struct s3c24xx_ac97_info {
  46         void __iomem    *regs;
  47         struct clk      *ac97_clk;
  48 };
  49 static struct s3c24xx_ac97_info s3c24xx_ac97;
  50
  51 DECLARE_COMPLETION(ac97_completion);
  52 static u32 codec_ready;
  53 static DECLARE_MUTEX(ac97_mutex);
  54
  55 static unsigned short s3c2443_ac97_read(struct snd_ac97 *ac97,
  56         unsigned short reg)
  57 {
  58         u32 ac_glbctrl;
  59         u32 ac_codec_cmd;
  60         u32 stat, addr, data;
  61
  62         down(&ac97_mutex);
  63
  64         codec_ready = S3C_AC97_GLBSTAT_CODECREADY;
  65         ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
  66         ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);
  67         writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
  68
  69         udelay(50);
  70
  71         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
  72         ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
  73         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
  74
  75         wait_for_completion(&ac97_completion);
  76
  77         stat = readl(s3c24xx_ac97.regs + S3C_AC97_STAT);
  78         addr = (stat >> 16) & 0x7f;
  79         data = (stat & 0xffff);
  80
  81         if (addr != reg)
  82                 printk(KERN_ERR "s3c24xx-ac97: req addr = %02x,"
  83                                 " rep addr = %02x\n", reg, addr);
  84
  85         up(&ac97_mutex);
  86
  87         return (unsigned short)data;
  88 }
  89
  90 static void s3c2443_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
  91         unsigned short val)
  92 {
  93         u32 ac_glbctrl;
  94         u32 ac_codec_cmd;
  95
  96         down(&ac97_mutex);
  97
  98         codec_ready = S3C_AC97_GLBSTAT_CODECREADY;
  99         ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
 100         ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);
 101         writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
 102
 103         udelay(50);
 104
 105         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 106         ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
 107         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 108
 109         wait_for_completion(&ac97_completion);
 110
 111         ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
 112         ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;
 113         writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
 114
 115         up(&ac97_mutex);
 116
 117 }
 118
 119 static void s3c2443_ac97_warm_reset(struct snd_ac97 *ac97)
 120 {
 121         u32 ac_glbctrl;
 122
 123         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 124         ac_glbctrl = S3C_AC97_GLBCTRL_WARMRESET;
 125         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 126         msleep(1);
 127
 128         ac_glbctrl = 0;
 129         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 130         msleep(1);
 131 }
 132
 133 static void s3c2443_ac97_cold_reset(struct snd_ac97 *ac97)
 134 {
 135         u32 ac_glbctrl;
 136
 137         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 138         ac_glbctrl = S3C_AC97_GLBCTRL_COLDRESET;
 139         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 140         msleep(1);
 141
 142         ac_glbctrl = 0;
 143         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 144         msleep(1);
 145
 146         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 147         ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
 148         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 149         msleep(1);
 150
 151         ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
 152         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 153         msleep(1);
 154
 155         ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA |
 156                 S3C_AC97_GLBCTRL_PCMINTM_DMA | S3C_AC97_GLBCTRL_MICINTM_DMA;
 157         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 158 }
 159
 160 static irqreturn_t s3c2443_ac97_irq(int irq, void *dev_id)
 161 {
 162         int status;
 163         u32 ac_glbctrl;
 164
 165         status = readl(s3c24xx_ac97.regs + S3C_AC97_GLBSTAT) & codec_ready;
 166
 167         if (status) {
 168                 ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 169                 ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
 170                 writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 171                 complete(&ac97_completion);
 172         }
 173         return IRQ_HANDLED;
 174 }
 175
 176 struct snd_ac97_bus_ops soc_ac97_ops = {
 177         .read   = s3c2443_ac97_read,
 178         .write  = s3c2443_ac97_write,
 179         .warm_reset     = s3c2443_ac97_warm_reset,
 180         .reset  = s3c2443_ac97_cold_reset,
 181 };
 182
 183 static struct s3c2410_dma_client s3c2443_dma_client_out = {
 184         .name = "AC97 PCM Stereo out"
 185 };
 186
 187 static struct s3c2410_dma_client s3c2443_dma_client_in = {
 188         .name = "AC97 PCM Stereo in"
 189 };
 190
 191 static struct s3c2410_dma_client s3c2443_dma_client_micin = {
 192         .name = "AC97 Mic Mono in"
 193 };
 194
 195 static struct s3c24xx_pcm_dma_params s3c2443_ac97_pcm_stereo_out = {
 196         .client         = &s3c2443_dma_client_out,
 197         .channel        = DMACH_PCM_OUT,
 198         .dma_addr       = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 199         .dma_size       = 4,
 200 };
 201
 202 static struct s3c24xx_pcm_dma_params s3c2443_ac97_pcm_stereo_in = {
 203         .client         = &s3c2443_dma_client_in,
 204         .channel        = DMACH_PCM_IN,
 205         .dma_addr       = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 206         .dma_size       = 4,
 207 };
 208
 209 static struct s3c24xx_pcm_dma_params s3c2443_ac97_mic_mono_in = {
 210         .client         = &s3c2443_dma_client_micin,
 211         .channel        = DMACH_MIC_IN,
 212         .dma_addr       = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
 213         .dma_size       = 4,
 214 };
 215
 216 static int s3c2443_ac97_probe(struct platform_device *pdev)
 217 {
 218         int ret;
 219         u32 ac_glbctrl;
 220
 221         s3c24xx_ac97.regs = ioremap(S3C2440_PA_AC97, 0x100);
 222         if (s3c24xx_ac97.regs == NULL)
 223                 return -ENXIO;
 224
 225         s3c24xx_ac97.ac97_clk = clk_get(&pdev->dev, "ac97");
 226         if (s3c24xx_ac97.ac97_clk == NULL) {
 227                 printk(KERN_ERR "s3c2443-ac97 failed to get ac97_clock\n");
 228                 iounmap(s3c24xx_ac97.regs);
 229                 return -ENODEV;
 230         }
 231         clk_enable(s3c24xx_ac97.ac97_clk);
 232
 233         s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2443_GPE0_AC_nRESET);
 234         s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2443_GPE1_AC_SYNC);
 235         s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2443_GPE2_AC_BITCLK);
 236         s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2443_GPE3_AC_SDI);
 237         s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2443_GPE4_AC_SDO);
 238
 239         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 240         ac_glbctrl = S3C_AC97_GLBCTRL_COLDRESET;
 241         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 242         msleep(1);
 243
 244         ac_glbctrl = 0;
 245         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 246         msleep(1);
 247
 248         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 249         ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
 250         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 251         msleep(1);
 252
 253         ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
 254         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 255
 256         ret = request_irq(IRQ_S3C2443_AC97, s3c2443_ac97_irq,
 257                 IRQF_DISABLED, "AC97", NULL);
 258         if (ret < 0) {
 259                 printk(KERN_ERR "s3c24xx-ac97: interrupt request failed.\n");
 260                 clk_disable(s3c24xx_ac97.ac97_clk);
 261                 clk_put(s3c24xx_ac97.ac97_clk);
 262                 iounmap(s3c24xx_ac97.regs);
 263         }
 264         return ret;
 265 }
 266
 267 static void s3c2443_ac97_remove(struct platform_device *pdev)
 268 {
 269         free_irq(IRQ_S3C2443_AC97, NULL);
 270         clk_disable(s3c24xx_ac97.ac97_clk);
 271         clk_put(s3c24xx_ac97.ac97_clk);
 272         iounmap(s3c24xx_ac97.regs);
 273 }
 274
 275 static int s3c2443_ac97_hw_params(struct snd_pcm_substream *substream,
 276                                 struct snd_pcm_hw_params *params)
 277 {
 278         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 279         struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
 280
 281         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 282                 cpu_dai->dma_data = &s3c2443_ac97_pcm_stereo_out;
 283         else
 284                 cpu_dai->dma_data = &s3c2443_ac97_pcm_stereo_in;
 285
 286         return 0;
 287 }
 288
 289 static int s3c2443_ac97_trigger(struct snd_pcm_substream *substream, int cmd)
 290 {
 291         u32 ac_glbctrl;
 292
 293         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 294         switch(cmd) {
 295         case SNDRV_PCM_TRIGGER_START:
 296         case SNDRV_PCM_TRIGGER_RESUME:
 297         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 298                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 299                         ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
 300                 else
 301                         ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;
 302                 break;
 303         case SNDRV_PCM_TRIGGER_STOP:
 304         case SNDRV_PCM_TRIGGER_SUSPEND:
 305         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 306                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 307                         ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
 308                 else
 309                         ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
 310                 break;
 311         }
 312         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 313
 314         return 0;
 315 }
 316
 317 static int s3c2443_ac97_hw_mic_params(struct snd_pcm_substream *substream,
 318         struct snd_pcm_hw_params *params)
 319 {
 320         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 321         struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
 322
 323         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 324                 return -ENODEV;
 325         else
 326                 cpu_dai->dma_data = &s3c2443_ac97_mic_mono_in;
 327
 328         return 0;
 329 }
 330
 331 static int s3c2443_ac97_mic_trigger(struct snd_pcm_substream *substream,
 332         int cmd)
 333 {
 334         u32 ac_glbctrl;
 335
 336         ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 337         switch(cmd) {
 338         case SNDRV_PCM_TRIGGER_START:
 339         case SNDRV_PCM_TRIGGER_RESUME:
 340         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 341                 ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
 342                 break;
 343         case SNDRV_PCM_TRIGGER_STOP:
 344         case SNDRV_PCM_TRIGGER_SUSPEND:
 345         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 346                 ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
 347         }
 348         writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 349
 350         return 0;
 351 }
 352
 353 #define s3c2443_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 354                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 355                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
 356
 357 struct snd_soc_cpu_dai s3c2443_ac97_dai[] = {
 358 {
 359         .name = "s3c2443-ac97",
 360         .id = 0,
 361         .type = SND_SOC_DAI_AC97,
 362         .probe = s3c2443_ac97_probe,
 363         .remove = s3c2443_ac97_remove,
 364         .playback = {
 365                 .stream_name = "AC97 Playback",
 366                 .channels_min = 2,
 367                 .channels_max = 2,
 368                 .rates = s3c2443_AC97_RATES,
 369                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 370         .capture = {
 371                 .stream_name = "AC97 Capture",
 372                 .channels_min = 2,
 373                 .channels_max = 2,
 374                 .rates = s3c2443_AC97_RATES,
 375                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 376         .ops = {
 377                 .hw_params = s3c2443_ac97_hw_params,
 378                 .trigger = s3c2443_ac97_trigger},
 379 },
 380 {
 381         .name = "pxa2xx-ac97-mic",
 382         .id = 1,
 383         .type = SND_SOC_DAI_AC97,
 384         .capture = {
 385                 .stream_name = "AC97 Mic Capture",
 386                 .channels_min = 1,
 387                 .channels_max = 1,
 388                 .rates = s3c2443_AC97_RATES,
 389                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
 390         .ops = {
 391                 .hw_params = s3c2443_ac97_hw_mic_params,
 392                 .trigger = s3c2443_ac97_mic_trigger,},
 393 },
 394 };
 395
 396 EXPORT_SYMBOL_GPL(s3c2443_ac97_dai);
 397 EXPORT_SYMBOL_GPL(soc_ac97_ops);
 398
 399 MODULE_AUTHOR("Graeme Gregory");
 400 MODULE_DESCRIPTION("AC97 driver for the Samsung s3c2443 chip");
 401 MODULE_LICENSE("GPL");