javier Martin | 2ccafed | 2009-08-04 17:18:02 +0200 | [diff] [blame] | 1 | /* |
| 2 | * mx27vis_wm8974.c -- SoC audio for mx27vis |
| 3 | * |
| 4 | * Copyright 2009 Vista Silicon S.L. |
| 5 | * Author: Javier Martin |
| 6 | * javier.martin@vista-silicon.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. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/moduleparam.h> |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/i2c.h> |
| 19 | #include <sound/core.h> |
| 20 | #include <sound/pcm.h> |
| 21 | #include <sound/soc.h> |
| 22 | #include <sound/soc-dapm.h> |
| 23 | |
| 24 | |
| 25 | #include "../codecs/wm8974.h" |
| 26 | #include "mx1_mx2-pcm.h" |
| 27 | #include "mxc-ssi.h" |
| 28 | #include <mach/gpio.h> |
| 29 | #include <mach/iomux.h> |
| 30 | |
| 31 | #define IGNORED_ARG 0 |
| 32 | |
| 33 | |
| 34 | static struct snd_soc_card mx27vis; |
| 35 | |
| 36 | /** |
| 37 | * This function connects SSI1 (HPCR1) as slave to |
| 38 | * SSI1 external signals (PPCR1) |
| 39 | * As slave, HPCR1 must set TFSDIR and TCLKDIR as inputs from |
| 40 | * port 4 |
| 41 | */ |
| 42 | void audmux_connect_1_4(void) |
| 43 | { |
| 44 | pr_debug("AUDMUX: normal operation mode\n"); |
| 45 | /* Reset HPCR1 and PPCR1 */ |
| 46 | |
| 47 | DAM_HPCR1 = 0x00000000; |
| 48 | DAM_PPCR1 = 0x00000000; |
| 49 | |
| 50 | /* set to synchronous */ |
| 51 | DAM_HPCR1 |= AUDMUX_HPCR_SYN; |
| 52 | DAM_PPCR1 |= AUDMUX_PPCR_SYN; |
| 53 | |
| 54 | |
| 55 | /* set Rx sources 1 <--> 4 */ |
| 56 | DAM_HPCR1 |= AUDMUX_HPCR_RXDSEL(3); /* port 4 */ |
| 57 | DAM_PPCR1 |= AUDMUX_PPCR_RXDSEL(0); /* port 1 */ |
| 58 | |
| 59 | /* set Tx frame and Clock direction and source 4 --> 1 output */ |
| 60 | DAM_HPCR1 |= AUDMUX_HPCR_TFSDIR | AUDMUX_HPCR_TCLKDIR; |
| 61 | DAM_HPCR1 |= AUDMUX_HPCR_TFCSEL(3); /* TxDS and TxCclk from port 4 */ |
| 62 | |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | static int mx27vis_hifi_hw_params(struct snd_pcm_substream *substream, |
| 67 | struct snd_pcm_hw_params *params) |
| 68 | { |
| 69 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 70 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; |
| 71 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; |
| 72 | unsigned int pll_out = 0, bclk = 0, fmt = 0, mclk = 0; |
| 73 | int ret = 0; |
| 74 | |
| 75 | /* |
| 76 | * The WM8974 is better at generating accurate audio clocks than the |
| 77 | * MX27 SSI controller, so we will use it as master when we can. |
| 78 | */ |
| 79 | switch (params_rate(params)) { |
| 80 | case 8000: |
| 81 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 82 | mclk = WM8974_MCLKDIV_12; |
| 83 | pll_out = 24576000; |
| 84 | break; |
| 85 | case 16000: |
| 86 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 87 | pll_out = 12288000; |
| 88 | break; |
| 89 | case 48000: |
| 90 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 91 | bclk = WM8974_BCLKDIV_4; |
| 92 | pll_out = 12288000; |
| 93 | break; |
| 94 | case 96000: |
| 95 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 96 | bclk = WM8974_BCLKDIV_2; |
| 97 | pll_out = 12288000; |
| 98 | break; |
| 99 | case 11025: |
| 100 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 101 | bclk = WM8974_BCLKDIV_16; |
| 102 | pll_out = 11289600; |
| 103 | break; |
| 104 | case 22050: |
| 105 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 106 | bclk = WM8974_BCLKDIV_8; |
| 107 | pll_out = 11289600; |
| 108 | break; |
| 109 | case 44100: |
| 110 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 111 | bclk = WM8974_BCLKDIV_4; |
| 112 | mclk = WM8974_MCLKDIV_2; |
| 113 | pll_out = 11289600; |
| 114 | break; |
| 115 | case 88200: |
| 116 | fmt = SND_SOC_DAIFMT_CBM_CFM; |
| 117 | bclk = WM8974_BCLKDIV_2; |
| 118 | pll_out = 11289600; |
| 119 | break; |
| 120 | } |
| 121 | |
| 122 | /* set codec DAI configuration */ |
| 123 | ret = codec_dai->ops->set_fmt(codec_dai, |
| 124 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF | |
| 125 | SND_SOC_DAIFMT_SYNC | fmt); |
| 126 | if (ret < 0) { |
| 127 | printk(KERN_ERR "Error from codec DAI configuration\n"); |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | /* set cpu DAI configuration */ |
| 132 | ret = cpu_dai->ops->set_fmt(cpu_dai, |
| 133 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
| 134 | SND_SOC_DAIFMT_SYNC | fmt); |
| 135 | if (ret < 0) { |
| 136 | printk(KERN_ERR "Error from cpu DAI configuration\n"); |
| 137 | return ret; |
| 138 | } |
| 139 | |
| 140 | /* Put DC field of STCCR to 1 (not zero) */ |
| 141 | ret = cpu_dai->ops->set_tdm_slot(cpu_dai, 0, 2); |
| 142 | |
| 143 | /* set the SSI system clock as input */ |
| 144 | ret = cpu_dai->ops->set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0, |
| 145 | SND_SOC_CLOCK_IN); |
| 146 | if (ret < 0) { |
| 147 | printk(KERN_ERR "Error when setting system SSI clk\n"); |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | /* set codec BCLK division for sample rate */ |
| 152 | ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_BCLKDIV, bclk); |
| 153 | if (ret < 0) { |
| 154 | printk(KERN_ERR "Error when setting BCLK division\n"); |
| 155 | return ret; |
| 156 | } |
| 157 | |
| 158 | |
| 159 | /* codec PLL input is 25 MHz */ |
Mark Brown | 8548803 | 2009-09-05 18:52:16 +0100 | [diff] [blame] | 160 | ret = codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, IGNORED_ARG, |
javier Martin | 2ccafed | 2009-08-04 17:18:02 +0200 | [diff] [blame] | 161 | 25000000, pll_out); |
| 162 | if (ret < 0) { |
| 163 | printk(KERN_ERR "Error when setting PLL input\n"); |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | /*set codec MCLK division for sample rate */ |
| 168 | ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_MCLKDIV, mclk); |
| 169 | if (ret < 0) { |
| 170 | printk(KERN_ERR "Error when setting MCLK division\n"); |
| 171 | return ret; |
| 172 | } |
| 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static int mx27vis_hifi_hw_free(struct snd_pcm_substream *substream) |
| 178 | { |
| 179 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 180 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; |
| 181 | |
| 182 | /* disable the PLL */ |
Guennadi Liakhovetski | 1628af5 | 2009-12-22 09:26:10 +0100 | [diff] [blame] | 183 | return codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, IGNORED_ARG, |
| 184 | 0, 0); |
javier Martin | 2ccafed | 2009-08-04 17:18:02 +0200 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | /* |
| 188 | * mx27vis WM8974 HiFi DAI opserations. |
| 189 | */ |
| 190 | static struct snd_soc_ops mx27vis_hifi_ops = { |
| 191 | .hw_params = mx27vis_hifi_hw_params, |
| 192 | .hw_free = mx27vis_hifi_hw_free, |
| 193 | }; |
| 194 | |
| 195 | |
| 196 | static int mx27vis_suspend(struct platform_device *pdev, pm_message_t state) |
| 197 | { |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int mx27vis_resume(struct platform_device *pdev) |
| 202 | { |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | static int mx27vis_probe(struct platform_device *pdev) |
| 207 | { |
| 208 | int ret = 0; |
| 209 | |
| 210 | ret = get_ssi_clk(0, &pdev->dev); |
| 211 | |
| 212 | if (ret < 0) { |
| 213 | printk(KERN_ERR "%s: cant get ssi clock\n", __func__); |
| 214 | return ret; |
| 215 | } |
| 216 | |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | static int mx27vis_remove(struct platform_device *pdev) |
| 222 | { |
| 223 | put_ssi_clk(0); |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | static struct snd_soc_dai_link mx27vis_dai[] = { |
| 228 | { /* Hifi Playback*/ |
| 229 | .name = "WM8974", |
| 230 | .stream_name = "WM8974 HiFi", |
| 231 | .cpu_dai = &imx_ssi_pcm_dai[0], |
| 232 | .codec_dai = &wm8974_dai, |
| 233 | .ops = &mx27vis_hifi_ops, |
| 234 | }, |
| 235 | }; |
| 236 | |
| 237 | static struct snd_soc_card mx27vis = { |
| 238 | .name = "mx27vis", |
| 239 | .platform = &mx1_mx2_soc_platform, |
| 240 | .probe = mx27vis_probe, |
| 241 | .remove = mx27vis_remove, |
| 242 | .suspend_pre = mx27vis_suspend, |
| 243 | .resume_post = mx27vis_resume, |
| 244 | .dai_link = mx27vis_dai, |
| 245 | .num_links = ARRAY_SIZE(mx27vis_dai), |
| 246 | }; |
| 247 | |
| 248 | static struct snd_soc_device mx27vis_snd_devdata = { |
| 249 | .card = &mx27vis, |
| 250 | .codec_dev = &soc_codec_dev_wm8974, |
| 251 | }; |
| 252 | |
| 253 | static struct platform_device *mx27vis_snd_device; |
| 254 | |
| 255 | /* Temporal definition of board specific behaviour */ |
| 256 | void gpio_ssi_active(int ssi_num) |
| 257 | { |
| 258 | int ret = 0; |
| 259 | |
| 260 | unsigned int ssi1_pins[] = { |
| 261 | PC20_PF_SSI1_FS, |
| 262 | PC21_PF_SSI1_RXD, |
| 263 | PC22_PF_SSI1_TXD, |
| 264 | PC23_PF_SSI1_CLK, |
| 265 | }; |
| 266 | unsigned int ssi2_pins[] = { |
| 267 | PC24_PF_SSI2_FS, |
| 268 | PC25_PF_SSI2_RXD, |
| 269 | PC26_PF_SSI2_TXD, |
| 270 | PC27_PF_SSI2_CLK, |
| 271 | }; |
| 272 | if (ssi_num == 0) |
| 273 | ret = mxc_gpio_setup_multiple_pins(ssi1_pins, |
| 274 | ARRAY_SIZE(ssi1_pins), "USB OTG"); |
| 275 | else |
| 276 | ret = mxc_gpio_setup_multiple_pins(ssi2_pins, |
| 277 | ARRAY_SIZE(ssi2_pins), "USB OTG"); |
| 278 | if (ret) |
| 279 | printk(KERN_ERR "Error requesting ssi %x pins\n", ssi_num); |
| 280 | } |
| 281 | |
| 282 | |
| 283 | static int __init mx27vis_init(void) |
| 284 | { |
| 285 | int ret; |
| 286 | |
| 287 | mx27vis_snd_device = platform_device_alloc("soc-audio", -1); |
| 288 | if (!mx27vis_snd_device) |
| 289 | return -ENOMEM; |
| 290 | |
| 291 | platform_set_drvdata(mx27vis_snd_device, &mx27vis_snd_devdata); |
| 292 | mx27vis_snd_devdata.dev = &mx27vis_snd_device->dev; |
| 293 | ret = platform_device_add(mx27vis_snd_device); |
| 294 | |
| 295 | if (ret) { |
| 296 | printk(KERN_ERR "ASoC: Platform device allocation failed\n"); |
| 297 | platform_device_put(mx27vis_snd_device); |
| 298 | } |
| 299 | |
| 300 | /* WM8974 uses SSI1 (HPCR1) via AUDMUX port 4 for audio (PPCR1) */ |
| 301 | gpio_ssi_active(0); |
| 302 | audmux_connect_1_4(); |
| 303 | |
| 304 | return ret; |
| 305 | } |
| 306 | |
| 307 | static void __exit mx27vis_exit(void) |
| 308 | { |
| 309 | /* We should call some "ssi_gpio_inactive()" properly */ |
| 310 | } |
| 311 | |
| 312 | module_init(mx27vis_init); |
| 313 | module_exit(mx27vis_exit); |
| 314 | |
| 315 | |
| 316 | MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com"); |
| 317 | MODULE_DESCRIPTION("ALSA SoC WM8974 mx27vis"); |
| 318 | MODULE_LICENSE("GPL"); |