Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 1 | /* |
| 2 | * bf6xx-i2s.c - Analog Devices BF6XX i2s interface driver |
| 3 | * |
| 4 | * Copyright (c) 2012 Analog Devices Inc. |
| 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 version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/device.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/platform_device.h> |
| 24 | #include <sound/pcm.h> |
| 25 | #include <sound/pcm_params.h> |
| 26 | #include <sound/soc.h> |
| 27 | #include <sound/soc-dai.h> |
| 28 | |
| 29 | #include "bf6xx-sport.h" |
| 30 | |
| 31 | struct sport_params param; |
| 32 | |
| 33 | static int bfin_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai, |
| 34 | unsigned int fmt) |
| 35 | { |
| 36 | struct sport_device *sport = snd_soc_dai_get_drvdata(cpu_dai); |
| 37 | struct device *dev = &sport->pdev->dev; |
| 38 | int ret = 0; |
| 39 | |
| 40 | param.spctl &= ~(SPORT_CTL_OPMODE | SPORT_CTL_CKRE | SPORT_CTL_FSR |
| 41 | | SPORT_CTL_LFS | SPORT_CTL_LAFS); |
| 42 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
| 43 | case SND_SOC_DAIFMT_I2S: |
| 44 | param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_CKRE |
| 45 | | SPORT_CTL_LFS; |
| 46 | break; |
| 47 | case SND_SOC_DAIFMT_DSP_A: |
| 48 | param.spctl |= SPORT_CTL_FSR; |
| 49 | break; |
| 50 | case SND_SOC_DAIFMT_LEFT_J: |
| 51 | param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_LFS |
| 52 | | SPORT_CTL_LAFS; |
| 53 | break; |
| 54 | default: |
| 55 | dev_err(dev, "%s: Unknown DAI format type\n", __func__); |
| 56 | ret = -EINVAL; |
| 57 | break; |
| 58 | } |
| 59 | |
| 60 | param.spctl &= ~(SPORT_CTL_ICLK | SPORT_CTL_IFS); |
| 61 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
| 62 | case SND_SOC_DAIFMT_CBM_CFM: |
| 63 | break; |
| 64 | case SND_SOC_DAIFMT_CBS_CFS: |
| 65 | case SND_SOC_DAIFMT_CBM_CFS: |
| 66 | case SND_SOC_DAIFMT_CBS_CFM: |
| 67 | ret = -EINVAL; |
| 68 | break; |
| 69 | default: |
| 70 | dev_err(dev, "%s: Unknown DAI master type\n", __func__); |
| 71 | ret = -EINVAL; |
| 72 | break; |
| 73 | } |
| 74 | |
| 75 | return ret; |
| 76 | } |
| 77 | |
| 78 | static int bfin_i2s_hw_params(struct snd_pcm_substream *substream, |
| 79 | struct snd_pcm_hw_params *params, |
| 80 | struct snd_soc_dai *dai) |
| 81 | { |
| 82 | struct sport_device *sport = snd_soc_dai_get_drvdata(dai); |
| 83 | struct device *dev = &sport->pdev->dev; |
| 84 | int ret = 0; |
| 85 | |
| 86 | param.spctl &= ~SPORT_CTL_SLEN; |
| 87 | switch (params_format(params)) { |
| 88 | case SNDRV_PCM_FORMAT_S8: |
| 89 | param.spctl |= 0x70; |
| 90 | sport->wdsize = 1; |
Valentin Ilie | 4f8ec17 | 2013-09-14 02:20:37 +0300 | [diff] [blame] | 91 | break; |
Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 92 | case SNDRV_PCM_FORMAT_S16_LE: |
| 93 | param.spctl |= 0xf0; |
| 94 | sport->wdsize = 2; |
| 95 | break; |
| 96 | case SNDRV_PCM_FORMAT_S24_LE: |
| 97 | param.spctl |= 0x170; |
| 98 | sport->wdsize = 3; |
| 99 | break; |
| 100 | case SNDRV_PCM_FORMAT_S32_LE: |
| 101 | param.spctl |= 0x1f0; |
| 102 | sport->wdsize = 4; |
| 103 | break; |
| 104 | } |
| 105 | |
| 106 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 107 | ret = sport_set_tx_params(sport, ¶m); |
| 108 | if (ret) { |
| 109 | dev_err(dev, "SPORT tx is busy!\n"); |
| 110 | return ret; |
| 111 | } |
| 112 | } else { |
| 113 | ret = sport_set_rx_params(sport, ¶m); |
| 114 | if (ret) { |
| 115 | dev_err(dev, "SPORT rx is busy!\n"); |
| 116 | return ret; |
| 117 | } |
| 118 | } |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | #ifdef CONFIG_PM |
| 123 | static int bfin_i2s_suspend(struct snd_soc_dai *dai) |
| 124 | { |
| 125 | struct sport_device *sport = snd_soc_dai_get_drvdata(dai); |
| 126 | |
| 127 | if (dai->capture_active) |
| 128 | sport_rx_stop(sport); |
| 129 | if (dai->playback_active) |
| 130 | sport_tx_stop(sport); |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | static int bfin_i2s_resume(struct snd_soc_dai *dai) |
| 135 | { |
| 136 | struct sport_device *sport = snd_soc_dai_get_drvdata(dai); |
| 137 | struct device *dev = &sport->pdev->dev; |
| 138 | int ret; |
| 139 | |
| 140 | ret = sport_set_tx_params(sport, ¶m); |
| 141 | if (ret) { |
| 142 | dev_err(dev, "SPORT tx is busy!\n"); |
| 143 | return ret; |
| 144 | } |
| 145 | ret = sport_set_rx_params(sport, ¶m); |
| 146 | if (ret) { |
| 147 | dev_err(dev, "SPORT rx is busy!\n"); |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | #else |
| 155 | #define bfin_i2s_suspend NULL |
| 156 | #define bfin_i2s_resume NULL |
| 157 | #endif |
| 158 | |
| 159 | #define BFIN_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
| 160 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ |
| 161 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \ |
| 162 | SNDRV_PCM_RATE_96000) |
| 163 | |
| 164 | #define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \ |
| 165 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) |
| 166 | |
| 167 | static struct snd_soc_dai_ops bfin_i2s_dai_ops = { |
| 168 | .hw_params = bfin_i2s_hw_params, |
| 169 | .set_fmt = bfin_i2s_set_dai_fmt, |
| 170 | }; |
| 171 | |
| 172 | static struct snd_soc_dai_driver bfin_i2s_dai = { |
| 173 | .suspend = bfin_i2s_suspend, |
| 174 | .resume = bfin_i2s_resume, |
| 175 | .playback = { |
| 176 | .channels_min = 1, |
| 177 | .channels_max = 2, |
| 178 | .rates = BFIN_I2S_RATES, |
| 179 | .formats = BFIN_I2S_FORMATS, |
| 180 | }, |
| 181 | .capture = { |
| 182 | .channels_min = 1, |
| 183 | .channels_max = 2, |
| 184 | .rates = BFIN_I2S_RATES, |
| 185 | .formats = BFIN_I2S_FORMATS, |
| 186 | }, |
| 187 | .ops = &bfin_i2s_dai_ops, |
| 188 | }; |
| 189 | |
Kuninori Morimoto | 3272c51 | 2013-03-21 03:29:46 -0700 | [diff] [blame] | 190 | static const struct snd_soc_component_driver bfin_i2s_component = { |
| 191 | .name = "bfin-i2s", |
| 192 | }; |
| 193 | |
Bill Pemberton | dca66da | 2012-12-07 09:26:13 -0500 | [diff] [blame] | 194 | static int bfin_i2s_probe(struct platform_device *pdev) |
Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 195 | { |
| 196 | struct sport_device *sport; |
| 197 | struct device *dev = &pdev->dev; |
| 198 | int ret; |
| 199 | |
| 200 | sport = sport_create(pdev); |
| 201 | if (!sport) |
| 202 | return -ENODEV; |
| 203 | |
| 204 | /* register with the ASoC layers */ |
Kuninori Morimoto | 3272c51 | 2013-03-21 03:29:46 -0700 | [diff] [blame] | 205 | ret = snd_soc_register_component(dev, &bfin_i2s_component, |
| 206 | &bfin_i2s_dai, 1); |
Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 207 | if (ret) { |
| 208 | dev_err(dev, "Failed to register DAI: %d\n", ret); |
| 209 | sport_delete(sport); |
| 210 | return ret; |
| 211 | } |
| 212 | platform_set_drvdata(pdev, sport); |
| 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
Bill Pemberton | dca66da | 2012-12-07 09:26:13 -0500 | [diff] [blame] | 217 | static int bfin_i2s_remove(struct platform_device *pdev) |
Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 218 | { |
| 219 | struct sport_device *sport = platform_get_drvdata(pdev); |
| 220 | |
Kuninori Morimoto | 3272c51 | 2013-03-21 03:29:46 -0700 | [diff] [blame] | 221 | snd_soc_unregister_component(&pdev->dev); |
Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 222 | sport_delete(sport); |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | static struct platform_driver bfin_i2s_driver = { |
| 228 | .probe = bfin_i2s_probe, |
Bill Pemberton | dca66da | 2012-12-07 09:26:13 -0500 | [diff] [blame] | 229 | .remove = bfin_i2s_remove, |
Scott Jiang | f62ae7b | 2012-06-20 17:00:31 -0400 | [diff] [blame] | 230 | .driver = { |
| 231 | .name = "bfin-i2s", |
| 232 | .owner = THIS_MODULE, |
| 233 | }, |
| 234 | }; |
| 235 | |
| 236 | module_platform_driver(bfin_i2s_driver); |
| 237 | |
| 238 | MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver"); |
| 239 | MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>"); |
| 240 | MODULE_LICENSE("GPL v2"); |