Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 1 | /* |
| 2 | * pxa2xx-i2s.c -- ALSA Soc Audio Layer |
| 3 | * |
| 4 | * Copyright 2005 Wolfson Microelectronics PLC. |
| 5 | * Author: Liam Girdwood |
| 6 | * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 12 | */ |
| 13 | |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/delay.h> |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 18 | #include <sound/core.h> |
| 19 | #include <sound/pcm.h> |
| 20 | #include <sound/initval.h> |
| 21 | #include <sound/soc.h> |
| 22 | |
| 23 | #include <asm/hardware.h> |
| 24 | #include <asm/arch/pxa-regs.h> |
eric miao | a683b14 | 2008-03-03 09:44:25 +0800 | [diff] [blame] | 25 | #include <asm/arch/pxa2xx-gpio.h> |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 26 | #include <asm/arch/audio.h> |
| 27 | |
| 28 | #include "pxa2xx-pcm.h" |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 29 | #include "pxa2xx-i2s.h" |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 30 | |
| 31 | struct pxa_i2s_port { |
| 32 | u32 sadiv; |
| 33 | u32 sacr0; |
| 34 | u32 sacr1; |
| 35 | u32 saimr; |
| 36 | int master; |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 37 | u32 fmt; |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 38 | }; |
| 39 | static struct pxa_i2s_port pxa_i2s; |
| 40 | |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 41 | static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_out = { |
| 42 | .name = "I2S PCM Stereo out", |
| 43 | .dev_addr = __PREG(SADR), |
| 44 | .drcmr = &DRCMRTXSADR, |
| 45 | .dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG | |
| 46 | DCMD_BURST32 | DCMD_WIDTH4, |
| 47 | }; |
| 48 | |
| 49 | static struct pxa2xx_pcm_dma_params pxa2xx_i2s_pcm_stereo_in = { |
| 50 | .name = "I2S PCM Stereo in", |
| 51 | .dev_addr = __PREG(SADR), |
| 52 | .drcmr = &DRCMRRXSADR, |
| 53 | .dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC | |
| 54 | DCMD_BURST32 | DCMD_WIDTH4, |
| 55 | }; |
| 56 | |
| 57 | static struct pxa2xx_gpio gpio_bus[] = { |
| 58 | { /* I2S SoC Slave */ |
| 59 | .rx = GPIO29_SDATA_IN_I2S_MD, |
| 60 | .tx = GPIO30_SDATA_OUT_I2S_MD, |
| 61 | .clk = GPIO28_BITCLK_IN_I2S_MD, |
| 62 | .frm = GPIO31_SYNC_I2S_MD, |
| 63 | }, |
| 64 | { /* I2S SoC Master */ |
| 65 | #ifdef CONFIG_PXA27x |
| 66 | .sys = GPIO113_I2S_SYSCLK_MD, |
| 67 | #else |
| 68 | .sys = GPIO32_SYSCLK_I2S_MD, |
| 69 | #endif |
| 70 | .rx = GPIO29_SDATA_IN_I2S_MD, |
| 71 | .tx = GPIO30_SDATA_OUT_I2S_MD, |
| 72 | .clk = GPIO28_BITCLK_OUT_I2S_MD, |
| 73 | .frm = GPIO31_SYNC_I2S_MD, |
| 74 | }, |
| 75 | }; |
| 76 | |
| 77 | static int pxa2xx_i2s_startup(struct snd_pcm_substream *substream) |
| 78 | { |
| 79 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 80 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 81 | |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 82 | if (!cpu_dai->active) { |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 83 | SACR0 |= SACR0_RST; |
| 84 | SACR0 = 0; |
| 85 | } |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | /* wait for I2S controller to be ready */ |
| 91 | static int pxa_i2s_wait(void) |
| 92 | { |
| 93 | int i; |
| 94 | |
| 95 | /* flush the Rx FIFO */ |
| 96 | for(i = 0; i < 16; i++) |
| 97 | SADR; |
| 98 | return 0; |
| 99 | } |
| 100 | |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 101 | static int pxa2xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 102 | unsigned int fmt) |
| 103 | { |
| 104 | /* interface format */ |
| 105 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 106 | case SND_SOC_DAIFMT_I2S: |
| 107 | pxa_i2s.fmt = 0; |
| 108 | break; |
| 109 | case SND_SOC_DAIFMT_LEFT_J: |
| 110 | pxa_i2s.fmt = SACR1_AMSL; |
| 111 | break; |
| 112 | } |
| 113 | |
| 114 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 115 | case SND_SOC_DAIFMT_CBS_CFS: |
| 116 | pxa_i2s.master = 1; |
| 117 | break; |
| 118 | case SND_SOC_DAIFMT_CBM_CFS: |
| 119 | pxa_i2s.master = 0; |
| 120 | break; |
| 121 | default: |
| 122 | break; |
| 123 | } |
| 124 | return 0; |
| 125 | } |
| 126 | |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 127 | static int pxa2xx_i2s_set_dai_sysclk(struct snd_soc_dai *cpu_dai, |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 128 | int clk_id, unsigned int freq, int dir) |
| 129 | { |
| 130 | if (clk_id != PXA2XX_I2S_SYSCLK) |
| 131 | return -ENODEV; |
| 132 | |
| 133 | if (pxa_i2s.master && dir == SND_SOC_CLOCK_OUT) |
| 134 | pxa_gpio_mode(gpio_bus[pxa_i2s.master].sys); |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 139 | static int pxa2xx_i2s_hw_params(struct snd_pcm_substream *substream, |
| 140 | struct snd_pcm_hw_params *params) |
| 141 | { |
| 142 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 143 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 144 | |
| 145 | pxa_gpio_mode(gpio_bus[pxa_i2s.master].rx); |
| 146 | pxa_gpio_mode(gpio_bus[pxa_i2s.master].tx); |
| 147 | pxa_gpio_mode(gpio_bus[pxa_i2s.master].frm); |
| 148 | pxa_gpio_mode(gpio_bus[pxa_i2s.master].clk); |
Eric Miao | 7053acb | 2007-04-05 04:07:20 +0100 | [diff] [blame] | 149 | pxa_set_cken(CKEN_I2S, 1); |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 150 | pxa_i2s_wait(); |
| 151 | |
| 152 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 153 | cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_out; |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 154 | else |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 155 | cpu_dai->dma_data = &pxa2xx_i2s_pcm_stereo_in; |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 156 | |
| 157 | /* is port used by another stream */ |
| 158 | if (!(SACR0 & SACR0_ENB)) { |
| 159 | |
| 160 | SACR0 = 0; |
| 161 | SACR1 = 0; |
| 162 | if (pxa_i2s.master) |
| 163 | SACR0 |= SACR0_BCKD; |
| 164 | |
| 165 | SACR0 |= SACR0_RFTH(14) | SACR0_TFTH(1); |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 166 | SACR1 |= pxa_i2s.fmt; |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 167 | } |
| 168 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 169 | SAIMR |= SAIMR_TFS; |
| 170 | else |
| 171 | SAIMR |= SAIMR_RFS; |
| 172 | |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 173 | switch (params_rate(params)) { |
| 174 | case 8000: |
| 175 | SADIV = 0x48; |
| 176 | break; |
| 177 | case 11025: |
| 178 | SADIV = 0x34; |
| 179 | break; |
| 180 | case 16000: |
| 181 | SADIV = 0x24; |
| 182 | break; |
| 183 | case 22050: |
| 184 | SADIV = 0x1a; |
| 185 | break; |
| 186 | case 44100: |
| 187 | SADIV = 0xd; |
| 188 | break; |
| 189 | case 48000: |
| 190 | SADIV = 0xc; |
| 191 | break; |
| 192 | case 96000: /* not in manual and possibly slightly inaccurate */ |
| 193 | SADIV = 0x6; |
| 194 | break; |
| 195 | } |
| 196 | |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | static int pxa2xx_i2s_trigger(struct snd_pcm_substream *substream, int cmd) |
| 201 | { |
| 202 | int ret = 0; |
| 203 | |
| 204 | switch (cmd) { |
| 205 | case SNDRV_PCM_TRIGGER_START: |
| 206 | SACR0 |= SACR0_ENB; |
| 207 | break; |
| 208 | case SNDRV_PCM_TRIGGER_RESUME: |
| 209 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 210 | case SNDRV_PCM_TRIGGER_STOP: |
| 211 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 212 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 213 | break; |
| 214 | default: |
| 215 | ret = -EINVAL; |
| 216 | } |
| 217 | |
| 218 | return ret; |
| 219 | } |
| 220 | |
| 221 | static void pxa2xx_i2s_shutdown(struct snd_pcm_substream *substream) |
| 222 | { |
| 223 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 224 | SACR1 |= SACR1_DRPL; |
| 225 | SAIMR &= ~SAIMR_TFS; |
| 226 | } else { |
| 227 | SACR1 |= SACR1_DREC; |
| 228 | SAIMR &= ~SAIMR_RFS; |
| 229 | } |
| 230 | |
| 231 | if (SACR1 & (SACR1_DREC | SACR1_DRPL)) { |
| 232 | SACR0 &= ~SACR0_ENB; |
| 233 | pxa_i2s_wait(); |
Eric Miao | 7053acb | 2007-04-05 04:07:20 +0100 | [diff] [blame] | 234 | pxa_set_cken(CKEN_I2S, 0); |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 235 | } |
| 236 | } |
| 237 | |
| 238 | #ifdef CONFIG_PM |
| 239 | static int pxa2xx_i2s_suspend(struct platform_device *dev, |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 240 | struct snd_soc_dai *dai) |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 241 | { |
| 242 | if (!dai->active) |
| 243 | return 0; |
| 244 | |
| 245 | /* store registers */ |
| 246 | pxa_i2s.sacr0 = SACR0; |
| 247 | pxa_i2s.sacr1 = SACR1; |
| 248 | pxa_i2s.saimr = SAIMR; |
| 249 | pxa_i2s.sadiv = SADIV; |
| 250 | |
| 251 | /* deactivate link */ |
| 252 | SACR0 &= ~SACR0_ENB; |
| 253 | pxa_i2s_wait(); |
| 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | static int pxa2xx_i2s_resume(struct platform_device *pdev, |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 258 | struct snd_soc_dai *dai) |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 259 | { |
| 260 | if (!dai->active) |
| 261 | return 0; |
| 262 | |
| 263 | pxa_i2s_wait(); |
| 264 | |
| 265 | SACR0 = pxa_i2s.sacr0 &= ~SACR0_ENB; |
| 266 | SACR1 = pxa_i2s.sacr1; |
| 267 | SAIMR = pxa_i2s.saimr; |
| 268 | SADIV = pxa_i2s.sadiv; |
| 269 | SACR0 |= SACR0_ENB; |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | #else |
| 275 | #define pxa2xx_i2s_suspend NULL |
| 276 | #define pxa2xx_i2s_resume NULL |
| 277 | #endif |
| 278 | |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 279 | #define PXA2XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
| 280 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \ |
| 281 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000) |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 282 | |
Liam Girdwood | 917f93a | 2008-07-07 16:08:11 +0100 | [diff] [blame^] | 283 | struct snd_soc_dai pxa_i2s_dai = { |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 284 | .name = "pxa2xx-i2s", |
| 285 | .id = 0, |
| 286 | .type = SND_SOC_DAI_I2S, |
| 287 | .suspend = pxa2xx_i2s_suspend, |
| 288 | .resume = pxa2xx_i2s_resume, |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 289 | .playback = { |
| 290 | .channels_min = 2, |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 291 | .channels_max = 2, |
| 292 | .rates = PXA2XX_I2S_RATES, |
| 293 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 294 | .capture = { |
| 295 | .channels_min = 2, |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 296 | .channels_max = 2, |
| 297 | .rates = PXA2XX_I2S_RATES, |
| 298 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 299 | .ops = { |
| 300 | .startup = pxa2xx_i2s_startup, |
| 301 | .shutdown = pxa2xx_i2s_shutdown, |
| 302 | .trigger = pxa2xx_i2s_trigger, |
| 303 | .hw_params = pxa2xx_i2s_hw_params,}, |
Philipp Zabel | eaff2ae | 2007-02-02 17:20:40 +0100 | [diff] [blame] | 304 | .dai_ops = { |
| 305 | .set_fmt = pxa2xx_i2s_set_dai_fmt, |
| 306 | .set_sysclk = pxa2xx_i2s_set_dai_sysclk, |
| 307 | }, |
Liam Girdwood | 3e7cc3d | 2006-10-12 14:28:10 +0200 | [diff] [blame] | 308 | }; |
| 309 | |
| 310 | EXPORT_SYMBOL_GPL(pxa_i2s_dai); |
| 311 | |
| 312 | /* Module information */ |
| 313 | MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com"); |
| 314 | MODULE_DESCRIPTION("pxa2xx I2S SoC Interface"); |
| 315 | MODULE_LICENSE("GPL"); |