| 1 | /* |
| 2 | * omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port |
| 3 | * |
| 4 | * Copyright (C) 2009 Texas Instruments |
| 5 | * |
| 6 | * Author: Misael Lopez Cruz <x0052729@ti.com> |
| 7 | * Contact: Jorge Eduardo Candelaria <x0107209@ti.com> |
| 8 | * Margarita Olaya <magi.olaya@ti.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 2 as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 22 | * 02110-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/device.h> |
| 29 | #include <sound/core.h> |
| 30 | #include <sound/pcm.h> |
| 31 | #include <sound/pcm_params.h> |
| 32 | #include <sound/initval.h> |
| 33 | #include <sound/soc.h> |
| 34 | |
| 35 | #include <plat/dma.h> |
| 36 | #include <plat/mcbsp.h> |
| 37 | #include "mcpdm.h" |
| 38 | #include "omap-pcm.h" |
| 39 | |
| 40 | struct omap_mcpdm_data { |
| 41 | struct omap_mcpdm_link *links; |
| 42 | int active; |
| 43 | }; |
| 44 | |
| 45 | static struct omap_mcpdm_link omap_mcpdm_links[] = { |
| 46 | /* downlink */ |
| 47 | { |
| 48 | .irq_mask = MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL, |
| 49 | .threshold = 1, |
| 50 | .format = PDMOUTFORMAT_LJUST, |
| 51 | }, |
| 52 | /* uplink */ |
| 53 | { |
| 54 | .irq_mask = MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL, |
| 55 | .threshold = 1, |
| 56 | .format = PDMOUTFORMAT_LJUST, |
| 57 | }, |
| 58 | }; |
| 59 | |
| 60 | static struct omap_mcpdm_data mcpdm_data = { |
| 61 | .links = omap_mcpdm_links, |
| 62 | .active = 0, |
| 63 | }; |
| 64 | |
| 65 | /* |
| 66 | * Stream DMA parameters |
| 67 | */ |
| 68 | static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = { |
| 69 | { |
| 70 | .name = "Audio playback", |
| 71 | .dma_req = OMAP44XX_DMA_MCPDM_DL, |
| 72 | .data_type = OMAP_DMA_DATA_TYPE_S32, |
| 73 | .sync_mode = OMAP_DMA_SYNC_PACKET, |
| 74 | .packet_size = 16, |
| 75 | .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA, |
| 76 | }, |
| 77 | { |
| 78 | .name = "Audio capture", |
| 79 | .dma_req = OMAP44XX_DMA_MCPDM_UP, |
| 80 | .data_type = OMAP_DMA_DATA_TYPE_S32, |
| 81 | .sync_mode = OMAP_DMA_SYNC_PACKET, |
| 82 | .packet_size = 16, |
| 83 | .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA, |
| 84 | }, |
| 85 | }; |
| 86 | |
| 87 | static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream, |
| 88 | struct snd_soc_dai *dai) |
| 89 | { |
| 90 | int err = 0; |
| 91 | |
| 92 | if (!dai->active) |
| 93 | err = omap_mcpdm_request(); |
| 94 | |
| 95 | return err; |
| 96 | } |
| 97 | |
| 98 | static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream, |
| 99 | struct snd_soc_dai *dai) |
| 100 | { |
| 101 | if (!dai->active) |
| 102 | omap_mcpdm_free(); |
| 103 | } |
| 104 | |
| 105 | static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd, |
| 106 | struct snd_soc_dai *dai) |
| 107 | { |
| 108 | struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai); |
| 109 | int stream = substream->stream; |
| 110 | int err = 0; |
| 111 | |
| 112 | switch (cmd) { |
| 113 | case SNDRV_PCM_TRIGGER_START: |
| 114 | case SNDRV_PCM_TRIGGER_RESUME: |
| 115 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 116 | if (!mcpdm_priv->active++) |
| 117 | omap_mcpdm_start(stream); |
| 118 | break; |
| 119 | |
| 120 | case SNDRV_PCM_TRIGGER_STOP: |
| 121 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 122 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 123 | if (!--mcpdm_priv->active) |
| 124 | omap_mcpdm_stop(stream); |
| 125 | break; |
| 126 | default: |
| 127 | err = -EINVAL; |
| 128 | } |
| 129 | |
| 130 | return err; |
| 131 | } |
| 132 | |
| 133 | static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream, |
| 134 | struct snd_pcm_hw_params *params, |
| 135 | struct snd_soc_dai *dai) |
| 136 | { |
| 137 | struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai); |
| 138 | struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links; |
| 139 | int stream = substream->stream; |
| 140 | int channels, err, link_mask = 0; |
| 141 | |
| 142 | snd_soc_dai_set_dma_data(dai, substream, |
| 143 | &omap_mcpdm_dai_dma_params[stream]); |
| 144 | |
| 145 | channels = params_channels(params); |
| 146 | switch (channels) { |
| 147 | case 4: |
| 148 | if (stream == SNDRV_PCM_STREAM_CAPTURE) |
| 149 | /* up to 2 channels for capture */ |
| 150 | return -EINVAL; |
| 151 | link_mask |= 1 << 3; |
| 152 | case 3: |
| 153 | if (stream == SNDRV_PCM_STREAM_CAPTURE) |
| 154 | /* up to 2 channels for capture */ |
| 155 | return -EINVAL; |
| 156 | link_mask |= 1 << 2; |
| 157 | case 2: |
| 158 | link_mask |= 1 << 1; |
| 159 | case 1: |
| 160 | link_mask |= 1 << 0; |
| 161 | break; |
| 162 | default: |
| 163 | /* unsupported number of channels */ |
| 164 | return -EINVAL; |
| 165 | } |
| 166 | |
| 167 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 168 | mcpdm_links[stream].channels = link_mask << 3; |
| 169 | err = omap_mcpdm_playback_open(&mcpdm_links[stream]); |
| 170 | } else { |
| 171 | mcpdm_links[stream].channels = link_mask << 0; |
| 172 | err = omap_mcpdm_capture_open(&mcpdm_links[stream]); |
| 173 | } |
| 174 | |
| 175 | return err; |
| 176 | } |
| 177 | |
| 178 | static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream, |
| 179 | struct snd_soc_dai *dai) |
| 180 | { |
| 181 | struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai); |
| 182 | struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links; |
| 183 | int stream = substream->stream; |
| 184 | int err; |
| 185 | |
| 186 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 187 | err = omap_mcpdm_playback_close(&mcpdm_links[stream]); |
| 188 | else |
| 189 | err = omap_mcpdm_capture_close(&mcpdm_links[stream]); |
| 190 | |
| 191 | return err; |
| 192 | } |
| 193 | |
| 194 | static struct snd_soc_dai_ops omap_mcpdm_dai_ops = { |
| 195 | .startup = omap_mcpdm_dai_startup, |
| 196 | .shutdown = omap_mcpdm_dai_shutdown, |
| 197 | .trigger = omap_mcpdm_dai_trigger, |
| 198 | .hw_params = omap_mcpdm_dai_hw_params, |
| 199 | .hw_free = omap_mcpdm_dai_hw_free, |
| 200 | }; |
| 201 | |
| 202 | #define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) |
| 203 | #define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE) |
| 204 | |
| 205 | static int omap_mcpdm_dai_probe(struct snd_soc_dai *dai) |
| 206 | { |
| 207 | snd_soc_dai_set_drvdata(dai, &mcpdm_data); |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | static struct snd_soc_dai_driver omap_mcpdm_dai = { |
| 212 | .probe = omap_mcpdm_dai_probe, |
| 213 | .playback = { |
| 214 | .channels_min = 1, |
| 215 | .channels_max = 4, |
| 216 | .rates = OMAP_MCPDM_RATES, |
| 217 | .formats = OMAP_MCPDM_FORMATS, |
| 218 | }, |
| 219 | .capture = { |
| 220 | .channels_min = 1, |
| 221 | .channels_max = 2, |
| 222 | .rates = OMAP_MCPDM_RATES, |
| 223 | .formats = OMAP_MCPDM_FORMATS, |
| 224 | }, |
| 225 | .ops = &omap_mcpdm_dai_ops, |
| 226 | }; |
| 227 | |
| 228 | static __devinit int asoc_mcpdm_probe(struct platform_device *pdev) |
| 229 | { |
| 230 | int ret; |
| 231 | |
| 232 | ret = omap_mcpdm_probe(pdev); |
| 233 | if (ret < 0) |
| 234 | return ret; |
| 235 | ret = snd_soc_register_dai(&pdev->dev, &omap_mcpdm_dai); |
| 236 | if (ret < 0) |
| 237 | omap_mcpdm_remove(pdev); |
| 238 | return ret; |
| 239 | } |
| 240 | |
| 241 | static int __devexit asoc_mcpdm_remove(struct platform_device *pdev) |
| 242 | { |
| 243 | snd_soc_unregister_dai(&pdev->dev); |
| 244 | omap_mcpdm_remove(pdev); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | static struct platform_driver asoc_mcpdm_driver = { |
| 249 | .driver = { |
| 250 | .name = "omap-mcpdm-dai", |
| 251 | .owner = THIS_MODULE, |
| 252 | }, |
| 253 | |
| 254 | .probe = asoc_mcpdm_probe, |
| 255 | .remove = __devexit_p(asoc_mcpdm_remove), |
| 256 | }; |
| 257 | |
| 258 | static int __init snd_omap_mcpdm_init(void) |
| 259 | { |
| 260 | return platform_driver_register(&asoc_mcpdm_driver); |
| 261 | } |
| 262 | module_init(snd_omap_mcpdm_init); |
| 263 | |
| 264 | static void __exit snd_omap_mcpdm_exit(void) |
| 265 | { |
| 266 | platform_driver_unregister(&asoc_mcpdm_driver); |
| 267 | } |
| 268 | module_exit(snd_omap_mcpdm_exit); |
| 269 | |
| 270 | MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>"); |
| 271 | MODULE_DESCRIPTION("OMAP PDM SoC Interface"); |
| 272 | MODULE_LICENSE("GPL"); |