Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 1 | /* |
| 2 | * omap-pcm.c -- ALSA PCM interface for the OMAP SoC |
| 3 | * |
| 4 | * Copyright (C) 2008 Nokia Corporation |
| 5 | * |
Jarkko Nikula | 7ec41ee | 2011-08-11 15:44:57 +0300 | [diff] [blame] | 6 | * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com> |
Peter Ujfalusi | 1c7687b | 2011-05-03 18:14:43 +0300 | [diff] [blame] | 7 | * Peter Ujfalusi <peter.ujfalusi@ti.com> |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * version 2 as published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 21 | * 02110-1301 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/dma-mapping.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Paul Gortmaker | da155d5 | 2011-07-15 12:38:28 -0400 | [diff] [blame] | 27 | #include <linux/module.h> |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 28 | #include <linux/omap-dma.h> |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 29 | #include <sound/core.h> |
| 30 | #include <sound/pcm.h> |
| 31 | #include <sound/pcm_params.h> |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 32 | #include <sound/dmaengine_pcm.h> |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 33 | #include <sound/soc.h> |
| 34 | |
Tony Lindgren | 27615a9 | 2012-10-15 16:24:23 -0700 | [diff] [blame] | 35 | #ifdef CONFIG_ARCH_OMAP1 |
| 36 | #define pcm_omap1510() cpu_is_omap1510() |
| 37 | #else |
| 38 | #define pcm_omap1510() 0 |
| 39 | #endif |
| 40 | |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 41 | static const struct snd_pcm_hardware omap_pcm_hardware = { |
| 42 | .info = SNDRV_PCM_INFO_MMAP | |
| 43 | SNDRV_PCM_INFO_MMAP_VALID | |
| 44 | SNDRV_PCM_INFO_INTERLEAVED | |
| 45 | SNDRV_PCM_INFO_PAUSE | |
Peter Ujfalusi | b417382 | 2011-05-12 13:04:55 +0300 | [diff] [blame] | 46 | SNDRV_PCM_INFO_RESUME | |
| 47 | SNDRV_PCM_INFO_NO_PERIOD_WAKEUP, |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 48 | .period_bytes_min = 32, |
| 49 | .period_bytes_max = 64 * 1024, |
| 50 | .periods_min = 2, |
| 51 | .periods_max = 255, |
| 52 | .buffer_bytes_max = 128 * 1024, |
| 53 | }; |
| 54 | |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 55 | /* this may get called several times by oss emulation */ |
| 56 | static int omap_pcm_hw_params(struct snd_pcm_substream *substream, |
| 57 | struct snd_pcm_hw_params *params) |
| 58 | { |
| 59 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 60 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 61 | struct omap_pcm_dma_data *dma_data; |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 62 | struct dma_slave_config config; |
| 63 | struct dma_chan *chan; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 64 | int err = 0; |
| 65 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 66 | dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 67 | |
Joonyoung Shim | 1b4246a | 2009-04-22 10:56:50 +0900 | [diff] [blame] | 68 | /* return if this is a bufferless transfer e.g. |
| 69 | * codec <--> BT codec or GSM modem -- lg FIXME */ |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 70 | if (!dma_data) |
Joonyoung Shim | 1b4246a | 2009-04-22 10:56:50 +0900 | [diff] [blame] | 71 | return 0; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 72 | |
| 73 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 74 | runtime->dma_bytes = params_buffer_bytes(params); |
| 75 | |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 76 | chan = snd_dmaengine_pcm_get_chan(substream); |
| 77 | if (!chan) |
| 78 | return -EINVAL; |
| 79 | |
| 80 | /* fills in addr_width and direction */ |
| 81 | err = snd_hwparams_to_dma_slave_config(substream, params, &config); |
| 82 | if (err) |
| 83 | return err; |
| 84 | |
Lars-Peter Clausen | 09ae3aa | 2013-04-03 11:06:05 +0200 | [diff] [blame] | 85 | snd_dmaengine_pcm_set_config_from_dai_data(substream, |
| 86 | snd_soc_dai_get_dma_data(rtd->cpu_dai, substream), |
| 87 | &config); |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 88 | |
| 89 | return dmaengine_slave_config(chan, &config); |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static int omap_pcm_hw_free(struct snd_pcm_substream *substream) |
| 93 | { |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 94 | snd_pcm_set_runtime_buffer(substream, NULL); |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 95 | return 0; |
| 96 | } |
| 97 | |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 98 | static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream) |
| 99 | { |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 100 | snd_pcm_uframes_t offset; |
| 101 | |
Tony Lindgren | 27615a9 | 2012-10-15 16:24:23 -0700 | [diff] [blame] | 102 | if (pcm_omap1510()) |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 103 | offset = snd_dmaengine_pcm_pointer_no_residue(substream); |
| 104 | else |
| 105 | offset = snd_dmaengine_pcm_pointer(substream); |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 106 | |
| 107 | return offset; |
| 108 | } |
| 109 | |
| 110 | static int omap_pcm_open(struct snd_pcm_substream *substream) |
| 111 | { |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 112 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Lars-Peter Clausen | 09ae3aa | 2013-04-03 11:06:05 +0200 | [diff] [blame] | 113 | struct snd_dmaengine_dai_dma_data *dma_data; |
Peter Ujfalusi | f6becf0 | 2013-07-11 14:35:43 +0200 | [diff] [blame] | 114 | int ret; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 115 | |
| 116 | snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware); |
| 117 | |
Peter Ujfalusi | 946cc36 | 2012-09-14 15:05:58 +0300 | [diff] [blame] | 118 | dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
Peter Ujfalusi | a92b531 | 2013-02-05 13:43:39 +0100 | [diff] [blame] | 119 | |
Peter Ujfalusi | f6becf0 | 2013-07-11 14:35:43 +0200 | [diff] [blame] | 120 | /* DT boot: filter_data is the DMA name */ |
| 121 | if (rtd->cpu_dai->dev->of_node) { |
| 122 | struct dma_chan *chan; |
| 123 | |
| 124 | chan = dma_request_slave_channel(rtd->cpu_dai->dev, |
| 125 | dma_data->filter_data); |
| 126 | ret = snd_dmaengine_pcm_open(substream, chan); |
| 127 | } else { |
| 128 | ret = snd_dmaengine_pcm_open_request_chan(substream, |
| 129 | omap_dma_filter_fn, |
| 130 | dma_data->filter_data); |
| 131 | } |
| 132 | return ret; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 133 | } |
| 134 | |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 135 | static int omap_pcm_mmap(struct snd_pcm_substream *substream, |
| 136 | struct vm_area_struct *vma) |
| 137 | { |
| 138 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 139 | |
| 140 | return dma_mmap_writecombine(substream->pcm->card->dev, vma, |
| 141 | runtime->dma_area, |
| 142 | runtime->dma_addr, |
| 143 | runtime->dma_bytes); |
| 144 | } |
| 145 | |
Mark Brown | b2a19d0 | 2009-01-17 19:14:26 +0000 | [diff] [blame] | 146 | static struct snd_pcm_ops omap_pcm_ops = { |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 147 | .open = omap_pcm_open, |
Lars-Peter Clausen | 7c1c1d4 | 2013-04-15 19:19:48 +0200 | [diff] [blame] | 148 | .close = snd_dmaengine_pcm_close_release_chan, |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 149 | .ioctl = snd_pcm_lib_ioctl, |
| 150 | .hw_params = omap_pcm_hw_params, |
| 151 | .hw_free = omap_pcm_hw_free, |
Lars-Peter Clausen | abe9937 | 2013-03-25 16:58:16 +0100 | [diff] [blame] | 152 | .trigger = snd_dmaengine_pcm_trigger, |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 153 | .pointer = omap_pcm_pointer, |
| 154 | .mmap = omap_pcm_mmap, |
| 155 | }; |
| 156 | |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 157 | static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, |
| 158 | int stream) |
| 159 | { |
| 160 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 161 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 162 | size_t size = omap_pcm_hardware.buffer_bytes_max; |
| 163 | |
| 164 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 165 | buf->dev.dev = pcm->card->dev; |
| 166 | buf->private_data = NULL; |
| 167 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, |
| 168 | &buf->addr, GFP_KERNEL); |
| 169 | if (!buf->area) |
| 170 | return -ENOMEM; |
| 171 | |
| 172 | buf->bytes = size; |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm) |
| 177 | { |
| 178 | struct snd_pcm_substream *substream; |
| 179 | struct snd_dma_buffer *buf; |
| 180 | int stream; |
| 181 | |
| 182 | for (stream = 0; stream < 2; stream++) { |
| 183 | substream = pcm->streams[stream].substream; |
| 184 | if (!substream) |
| 185 | continue; |
| 186 | |
| 187 | buf = &substream->dma_buffer; |
| 188 | if (!buf->area) |
| 189 | continue; |
| 190 | |
| 191 | dma_free_writecombine(pcm->card->dev, buf->bytes, |
| 192 | buf->area, buf->addr); |
| 193 | buf->area = NULL; |
| 194 | } |
| 195 | } |
| 196 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 197 | static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd) |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 198 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 199 | struct snd_card *card = rtd->card->snd_card; |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 200 | struct snd_pcm *pcm = rtd->pcm; |
Russell King | c9bd5e6 | 2013-06-27 12:53:37 +0100 | [diff] [blame] | 201 | int ret; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 202 | |
Russell King | c9bd5e6 | 2013-06-27 12:53:37 +0100 | [diff] [blame] | 203 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(64)); |
| 204 | if (ret) |
| 205 | return ret; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 206 | |
Joachim Eastwood | 25e9e75 | 2012-01-01 01:58:44 +0100 | [diff] [blame] | 207 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 208 | ret = omap_pcm_preallocate_dma_buffer(pcm, |
| 209 | SNDRV_PCM_STREAM_PLAYBACK); |
| 210 | if (ret) |
| 211 | goto out; |
| 212 | } |
| 213 | |
Joachim Eastwood | 25e9e75 | 2012-01-01 01:58:44 +0100 | [diff] [blame] | 214 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 215 | ret = omap_pcm_preallocate_dma_buffer(pcm, |
| 216 | SNDRV_PCM_STREAM_CAPTURE); |
| 217 | if (ret) |
| 218 | goto out; |
| 219 | } |
| 220 | |
| 221 | out: |
Oleg Matcovschi | fad9365 | 2012-04-24 19:02:02 -0700 | [diff] [blame] | 222 | /* free preallocated buffers in case of error */ |
| 223 | if (ret) |
| 224 | omap_pcm_free_dma_buffers(pcm); |
| 225 | |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 226 | return ret; |
| 227 | } |
| 228 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 229 | static struct snd_soc_platform_driver omap_soc_platform = { |
| 230 | .ops = &omap_pcm_ops, |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 231 | .pcm_new = omap_pcm_new, |
| 232 | .pcm_free = omap_pcm_free_dma_buffers, |
| 233 | }; |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 234 | |
Bill Pemberton | 7ff6000 | 2012-12-07 09:26:29 -0500 | [diff] [blame] | 235 | static int omap_pcm_probe(struct platform_device *pdev) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 236 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 237 | return snd_soc_register_platform(&pdev->dev, |
| 238 | &omap_soc_platform); |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 239 | } |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 240 | |
Bill Pemberton | 7ff6000 | 2012-12-07 09:26:29 -0500 | [diff] [blame] | 241 | static int omap_pcm_remove(struct platform_device *pdev) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 242 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 243 | snd_soc_unregister_platform(&pdev->dev); |
| 244 | return 0; |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 245 | } |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 246 | |
| 247 | static struct platform_driver omap_pcm_driver = { |
| 248 | .driver = { |
| 249 | .name = "omap-pcm-audio", |
| 250 | .owner = THIS_MODULE, |
| 251 | }, |
| 252 | |
| 253 | .probe = omap_pcm_probe, |
Bill Pemberton | 7ff6000 | 2012-12-07 09:26:29 -0500 | [diff] [blame] | 254 | .remove = omap_pcm_remove, |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 255 | }; |
| 256 | |
Axel Lin | beda5bf5 | 2011-11-25 10:12:16 +0800 | [diff] [blame] | 257 | module_platform_driver(omap_pcm_driver); |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 258 | |
Jarkko Nikula | 7ec41ee | 2011-08-11 15:44:57 +0300 | [diff] [blame] | 259 | MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>"); |
Jarkko Nikula | 2e74796 | 2008-04-25 13:55:19 +0200 | [diff] [blame] | 260 | MODULE_DESCRIPTION("OMAP PCM DMA module"); |
| 261 | MODULE_LICENSE("GPL"); |
Guillaume Gardet | 5e70b7fc | 2012-07-12 15:08:16 +0200 | [diff] [blame] | 262 | MODULE_ALIAS("platform:omap-pcm-audio"); |