Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 1 | /* |
| 2 | * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based |
| 3 | * ATMEL AT91SAM9G20ek board. |
| 4 | * |
| 5 | * Copyright (C) 2005 SAN People |
| 6 | * Copyright (C) 2008 Atmel |
| 7 | * |
| 8 | * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> |
| 9 | * |
| 10 | * Based on ati_b1_wm8731.c by: |
| 11 | * Frank Mandarino <fmandarino@endrelia.com> |
| 12 | * Copyright 2006 Endrelia Technologies Inc. |
| 13 | * Based on corgi.c by: |
| 14 | * Copyright 2005 Wolfson Microelectronics PLC. |
| 15 | * Copyright 2005 Openedhand Ltd. |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or modify |
| 18 | * it under the terms of the GNU General Public License as published by |
| 19 | * the Free Software Foundation; either version 2 of the License, or |
| 20 | * (at your option) any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 30 | */ |
| 31 | |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/moduleparam.h> |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 34 | #include <linux/kernel.h> |
| 35 | #include <linux/clk.h> |
| 36 | #include <linux/timer.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/platform_device.h> |
Mark Brown | 5998102 | 2009-02-16 20:49:16 +0000 | [diff] [blame] | 39 | #include <linux/i2c.h> |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 40 | |
| 41 | #include <linux/atmel-ssc.h> |
| 42 | |
| 43 | #include <sound/core.h> |
| 44 | #include <sound/pcm.h> |
| 45 | #include <sound/pcm_params.h> |
| 46 | #include <sound/soc.h> |
| 47 | #include <sound/soc-dapm.h> |
| 48 | |
Mark Brown | 40135ea | 2009-02-16 16:04:05 +0000 | [diff] [blame] | 49 | #include <asm/mach-types.h> |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 50 | #include <mach/hardware.h> |
| 51 | #include <mach/gpio.h> |
| 52 | |
| 53 | #include "../codecs/wm8731.h" |
| 54 | #include "atmel-pcm.h" |
| 55 | #include "atmel_ssc_dai.h" |
| 56 | |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 57 | #define MCLK_RATE 12000000 |
| 58 | |
Mark Brown | 22df8eb | 2009-07-08 18:18:19 +0100 | [diff] [blame^] | 59 | /* |
| 60 | * As shipped the board does not have inputs. However, it is relatively |
| 61 | * straightforward to modify the board to hook them up so support is left |
| 62 | * in the driver. |
| 63 | */ |
| 64 | #undef ENABLE_MIC_INPUT |
| 65 | |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 66 | static struct clk *mclk; |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 67 | |
| 68 | static int at91sam9g20ek_startup(struct snd_pcm_substream *substream) |
| 69 | { |
| 70 | struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream); |
| 71 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; |
| 72 | int ret; |
| 73 | |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 74 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 75 | MCLK_RATE, SND_SOC_CLOCK_IN); |
| 76 | if (ret < 0) { |
| 77 | clk_disable(mclk); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 78 | return ret; |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 79 | } |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | static void at91sam9g20ek_shutdown(struct snd_pcm_substream *substream) |
| 85 | { |
| 86 | struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream); |
| 87 | |
| 88 | dev_dbg(rtd->socdev->dev, "shutdown"); |
| 89 | } |
| 90 | |
| 91 | static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream, |
| 92 | struct snd_pcm_hw_params *params) |
| 93 | { |
| 94 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 95 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; |
| 96 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 97 | int ret; |
| 98 | |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 99 | /* set codec DAI configuration */ |
| 100 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | |
Mark Brown | 2a01e5f | 2009-07-08 18:05:51 +0100 | [diff] [blame] | 101 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 102 | if (ret < 0) |
| 103 | return ret; |
| 104 | |
| 105 | /* set cpu DAI configuration */ |
| 106 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | |
Mark Brown | 2a01e5f | 2009-07-08 18:05:51 +0100 | [diff] [blame] | 107 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 108 | if (ret < 0) |
| 109 | return ret; |
| 110 | |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | static struct snd_soc_ops at91sam9g20ek_ops = { |
| 115 | .startup = at91sam9g20ek_startup, |
| 116 | .hw_params = at91sam9g20ek_hw_params, |
| 117 | .shutdown = at91sam9g20ek_shutdown, |
| 118 | }; |
| 119 | |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 120 | static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card, |
| 121 | enum snd_soc_bias_level level) |
| 122 | { |
| 123 | static int mclk_on; |
| 124 | int ret = 0; |
| 125 | |
| 126 | switch (level) { |
| 127 | case SND_SOC_BIAS_ON: |
| 128 | case SND_SOC_BIAS_PREPARE: |
| 129 | if (!mclk_on) |
| 130 | ret = clk_enable(mclk); |
| 131 | if (ret == 0) |
| 132 | mclk_on = 1; |
| 133 | break; |
| 134 | |
| 135 | case SND_SOC_BIAS_OFF: |
| 136 | case SND_SOC_BIAS_STANDBY: |
| 137 | if (mclk_on) |
| 138 | clk_disable(mclk); |
| 139 | mclk_on = 0; |
| 140 | break; |
| 141 | } |
| 142 | |
| 143 | return ret; |
| 144 | } |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 145 | |
| 146 | static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { |
| 147 | SND_SOC_DAPM_MIC("Int Mic", NULL), |
| 148 | SND_SOC_DAPM_SPK("Ext Spk", NULL), |
| 149 | }; |
| 150 | |
| 151 | static const struct snd_soc_dapm_route intercon[] = { |
| 152 | |
| 153 | /* speaker connected to LHPOUT */ |
| 154 | {"Ext Spk", NULL, "LHPOUT"}, |
| 155 | |
| 156 | /* mic is connected to Mic Jack, with WM8731 Mic Bias */ |
| 157 | {"MICIN", NULL, "Mic Bias"}, |
| 158 | {"Mic Bias", NULL, "Int Mic"}, |
| 159 | }; |
| 160 | |
| 161 | /* |
| 162 | * Logic for a wm8731 as connected on a at91sam9g20ek board. |
| 163 | */ |
| 164 | static int at91sam9g20ek_wm8731_init(struct snd_soc_codec *codec) |
| 165 | { |
| 166 | printk(KERN_DEBUG |
| 167 | "at91sam9g20ek_wm8731 " |
| 168 | ": at91sam9g20ek_wm8731_init() called\n"); |
| 169 | |
| 170 | /* Add specific widgets */ |
| 171 | snd_soc_dapm_new_controls(codec, at91sam9g20ek_dapm_widgets, |
| 172 | ARRAY_SIZE(at91sam9g20ek_dapm_widgets)); |
| 173 | /* Set up specific audio path interconnects */ |
| 174 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); |
| 175 | |
| 176 | /* not connected */ |
Mark Brown | 8c0bad7 | 2009-01-06 09:52:18 +0000 | [diff] [blame] | 177 | snd_soc_dapm_nc_pin(codec, "RLINEIN"); |
| 178 | snd_soc_dapm_nc_pin(codec, "LLINEIN"); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 179 | |
Mark Brown | 22df8eb | 2009-07-08 18:18:19 +0100 | [diff] [blame^] | 180 | #ifdef ENABLE_MIC_INPUT |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 181 | snd_soc_dapm_enable_pin(codec, "Int Mic"); |
Mark Brown | 22df8eb | 2009-07-08 18:18:19 +0100 | [diff] [blame^] | 182 | #else |
| 183 | snd_soc_dapm_nc_pin(codec, "Int Mic"); |
| 184 | #endif |
| 185 | |
| 186 | /* always connected */ |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 187 | snd_soc_dapm_enable_pin(codec, "Ext Spk"); |
| 188 | |
| 189 | snd_soc_dapm_sync(codec); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static struct snd_soc_dai_link at91sam9g20ek_dai = { |
| 195 | .name = "WM8731", |
| 196 | .stream_name = "WM8731 PCM", |
| 197 | .cpu_dai = &atmel_ssc_dai[0], |
| 198 | .codec_dai = &wm8731_dai, |
| 199 | .init = at91sam9g20ek_wm8731_init, |
| 200 | .ops = &at91sam9g20ek_ops, |
| 201 | }; |
| 202 | |
Mark Brown | 8750654 | 2008-11-18 20:50:34 +0000 | [diff] [blame] | 203 | static struct snd_soc_card snd_soc_at91sam9g20ek = { |
Mark Brown | 7ee7538 | 2009-02-16 18:00:58 +0000 | [diff] [blame] | 204 | .name = "AT91SAMG20-EK", |
Mark Brown | 87689d5 | 2008-12-02 16:01:14 +0000 | [diff] [blame] | 205 | .platform = &atmel_soc_platform, |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 206 | .dai_link = &at91sam9g20ek_dai, |
| 207 | .num_links = 1, |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 208 | .set_bias_level = at91sam9g20ek_set_bias_level, |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 209 | }; |
| 210 | |
Mark Brown | 5998102 | 2009-02-16 20:49:16 +0000 | [diff] [blame] | 211 | /* |
| 212 | * FIXME: This is a temporary bodge to avoid cross-tree merge issues. |
| 213 | * New drivers should register the wm8731 I2C device in the machine |
| 214 | * setup code (under arch/arm for ARM systems). |
| 215 | */ |
| 216 | static int wm8731_i2c_register(void) |
| 217 | { |
| 218 | struct i2c_board_info info; |
| 219 | struct i2c_adapter *adapter; |
| 220 | struct i2c_client *client; |
| 221 | |
| 222 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 223 | info.addr = 0x1b; |
| 224 | strlcpy(info.type, "wm8731", I2C_NAME_SIZE); |
| 225 | |
| 226 | adapter = i2c_get_adapter(0); |
| 227 | if (!adapter) { |
| 228 | printk(KERN_ERR "can't get i2c adapter 0\n"); |
| 229 | return -ENODEV; |
| 230 | } |
| 231 | |
| 232 | client = i2c_new_device(adapter, &info); |
| 233 | i2c_put_adapter(adapter); |
| 234 | if (!client) { |
| 235 | printk(KERN_ERR "can't add i2c device at 0x%x\n", |
| 236 | (unsigned int)info.addr); |
| 237 | return -ENODEV; |
| 238 | } |
| 239 | |
| 240 | return 0; |
| 241 | } |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 242 | |
| 243 | static struct snd_soc_device at91sam9g20ek_snd_devdata = { |
Mark Brown | 8750654 | 2008-11-18 20:50:34 +0000 | [diff] [blame] | 244 | .card = &snd_soc_at91sam9g20ek, |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 245 | .codec_dev = &soc_codec_dev_wm8731, |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 246 | }; |
| 247 | |
| 248 | static struct platform_device *at91sam9g20ek_snd_device; |
| 249 | |
| 250 | static int __init at91sam9g20ek_init(void) |
| 251 | { |
| 252 | struct atmel_ssc_info *ssc_p = at91sam9g20ek_dai.cpu_dai->private_data; |
| 253 | struct ssc_device *ssc = NULL; |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 254 | struct clk *pllb; |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 255 | int ret; |
| 256 | |
Mark Brown | 40135ea | 2009-02-16 16:04:05 +0000 | [diff] [blame] | 257 | if (!machine_is_at91sam9g20ek()) |
| 258 | return -ENODEV; |
| 259 | |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 260 | /* |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 261 | * Codec MCLK is supplied by PCK0 - set it up. |
| 262 | */ |
| 263 | mclk = clk_get(NULL, "pck0"); |
| 264 | if (IS_ERR(mclk)) { |
| 265 | printk(KERN_ERR "ASoC: Failed to get MCLK\n"); |
| 266 | ret = PTR_ERR(mclk); |
| 267 | goto err; |
| 268 | } |
| 269 | |
| 270 | pllb = clk_get(NULL, "pllb"); |
| 271 | if (IS_ERR(mclk)) { |
| 272 | printk(KERN_ERR "ASoC: Failed to get PLLB\n"); |
| 273 | ret = PTR_ERR(mclk); |
| 274 | goto err_mclk; |
| 275 | } |
| 276 | ret = clk_set_parent(mclk, pllb); |
| 277 | clk_put(pllb); |
| 278 | if (ret != 0) { |
| 279 | printk(KERN_ERR "ASoC: Failed to set MCLK parent\n"); |
| 280 | goto err_mclk; |
| 281 | } |
| 282 | |
| 283 | clk_set_rate(mclk, MCLK_RATE); |
| 284 | |
| 285 | /* |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 286 | * Request SSC device |
| 287 | */ |
| 288 | ssc = ssc_request(0); |
| 289 | if (IS_ERR(ssc)) { |
Mark Brown | d694354 | 2009-02-16 13:38:11 +0000 | [diff] [blame] | 290 | printk(KERN_ERR "ASoC: Failed to request SSC 0\n"); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 291 | ret = PTR_ERR(ssc); |
| 292 | ssc = NULL; |
| 293 | goto err_ssc; |
| 294 | } |
| 295 | ssc_p->ssc = ssc; |
| 296 | |
Mark Brown | 5998102 | 2009-02-16 20:49:16 +0000 | [diff] [blame] | 297 | ret = wm8731_i2c_register(); |
| 298 | if (ret != 0) |
| 299 | goto err_ssc; |
| 300 | |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 301 | at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1); |
| 302 | if (!at91sam9g20ek_snd_device) { |
Mark Brown | d694354 | 2009-02-16 13:38:11 +0000 | [diff] [blame] | 303 | printk(KERN_ERR "ASoC: Platform device allocation failed\n"); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 304 | ret = -ENOMEM; |
| 305 | } |
| 306 | |
| 307 | platform_set_drvdata(at91sam9g20ek_snd_device, |
| 308 | &at91sam9g20ek_snd_devdata); |
| 309 | at91sam9g20ek_snd_devdata.dev = &at91sam9g20ek_snd_device->dev; |
| 310 | |
| 311 | ret = platform_device_add(at91sam9g20ek_snd_device); |
| 312 | if (ret) { |
Mark Brown | d694354 | 2009-02-16 13:38:11 +0000 | [diff] [blame] | 313 | printk(KERN_ERR "ASoC: Platform device allocation failed\n"); |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 314 | platform_device_put(at91sam9g20ek_snd_device); |
| 315 | } |
| 316 | |
| 317 | return ret; |
| 318 | |
| 319 | err_ssc: |
Mark Brown | 5998102 | 2009-02-16 20:49:16 +0000 | [diff] [blame] | 320 | ssc_free(ssc); |
| 321 | ssc_p->ssc = NULL; |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 322 | err_mclk: |
| 323 | clk_put(mclk); |
| 324 | mclk = NULL; |
| 325 | err: |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 326 | return ret; |
| 327 | } |
| 328 | |
| 329 | static void __exit at91sam9g20ek_exit(void) |
| 330 | { |
| 331 | struct atmel_ssc_info *ssc_p = at91sam9g20ek_dai.cpu_dai->private_data; |
| 332 | struct ssc_device *ssc; |
| 333 | |
| 334 | if (ssc_p != NULL) { |
| 335 | ssc = ssc_p->ssc; |
| 336 | if (ssc != NULL) |
| 337 | ssc_free(ssc); |
| 338 | ssc_p->ssc = NULL; |
| 339 | } |
| 340 | |
| 341 | platform_device_unregister(at91sam9g20ek_snd_device); |
| 342 | at91sam9g20ek_snd_device = NULL; |
Mark Brown | 5de7f9b | 2009-02-16 17:51:54 +0000 | [diff] [blame] | 343 | clk_put(mclk); |
| 344 | mclk = NULL; |
Sedji Gaouaou | 5b99e6c | 2008-10-03 16:58:58 +0200 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | module_init(at91sam9g20ek_init); |
| 348 | module_exit(at91sam9g20ek_exit); |
| 349 | |
| 350 | /* Module information */ |
| 351 | MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); |
| 352 | MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); |
| 353 | MODULE_LICENSE("GPL"); |