Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 1 | /* |
| 2 | * s3c24xx-pcm.c -- ALSA Soc Audio Layer |
| 3 | * |
| 4 | * (c) 2006 Wolfson Microelectronics PLC. |
| 5 | * Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com |
| 6 | * |
Ben Dooks | c8efef1 | 2009-02-28 17:09:57 +0000 | [diff] [blame] | 7 | * Copyright 2004-2005 Simtec Electronics |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 8 | * http://armlinux.simtec.co.uk/ |
| 9 | * Ben Dooks <ben@simtec.co.uk> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License as published by the |
| 13 | * Free Software Foundation; either version 2 of the License, or (at your |
| 14 | * option) any later version. |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/init.h> |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 19 | #include <linux/io.h> |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/dma-mapping.h> |
| 23 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 24 | #include <sound/core.h> |
| 25 | #include <sound/pcm.h> |
| 26 | #include <sound/pcm_params.h> |
| 27 | #include <sound/soc.h> |
| 28 | |
| 29 | #include <asm/dma.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 30 | #include <mach/hardware.h> |
| 31 | #include <mach/dma.h> |
Ben Dooks | 899e6cf | 2009-03-04 00:49:28 +0000 | [diff] [blame] | 32 | #include <plat/audio.h> |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 33 | |
| 34 | #include "s3c24xx-pcm.h" |
| 35 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 36 | static const struct snd_pcm_hardware s3c24xx_pcm_hardware = { |
| 37 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 38 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 39 | SNDRV_PCM_INFO_MMAP | |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 40 | SNDRV_PCM_INFO_MMAP_VALID | |
| 41 | SNDRV_PCM_INFO_PAUSE | |
| 42 | SNDRV_PCM_INFO_RESUME, |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 43 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
| 44 | SNDRV_PCM_FMTBIT_U16_LE | |
| 45 | SNDRV_PCM_FMTBIT_U8 | |
| 46 | SNDRV_PCM_FMTBIT_S8, |
| 47 | .channels_min = 2, |
| 48 | .channels_max = 2, |
| 49 | .buffer_bytes_max = 128*1024, |
| 50 | .period_bytes_min = PAGE_SIZE, |
| 51 | .period_bytes_max = PAGE_SIZE*2, |
| 52 | .periods_min = 2, |
| 53 | .periods_max = 128, |
| 54 | .fifo_size = 32, |
| 55 | }; |
| 56 | |
| 57 | struct s3c24xx_runtime_data { |
| 58 | spinlock_t lock; |
| 59 | int state; |
| 60 | unsigned int dma_loaded; |
| 61 | unsigned int dma_limit; |
| 62 | unsigned int dma_period; |
| 63 | dma_addr_t dma_start; |
| 64 | dma_addr_t dma_pos; |
| 65 | dma_addr_t dma_end; |
| 66 | struct s3c24xx_pcm_dma_params *params; |
| 67 | }; |
| 68 | |
| 69 | /* s3c24xx_pcm_enqueue |
| 70 | * |
| 71 | * place a dma buffer onto the queue for the dma system |
| 72 | * to handle. |
| 73 | */ |
Mark Brown | 2bef901 | 2008-11-14 14:40:46 +0000 | [diff] [blame] | 74 | static void s3c24xx_pcm_enqueue(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 75 | { |
| 76 | struct s3c24xx_runtime_data *prtd = substream->runtime->private_data; |
| 77 | dma_addr_t pos = prtd->dma_pos; |
| 78 | int ret; |
| 79 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 80 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 81 | |
Mark Brown | 2bef901 | 2008-11-14 14:40:46 +0000 | [diff] [blame] | 82 | while (prtd->dma_loaded < prtd->dma_limit) { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 83 | unsigned long len = prtd->dma_period; |
| 84 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 85 | pr_debug("dma_loaded: %d\n", prtd->dma_loaded); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 86 | |
| 87 | if ((pos + len) > prtd->dma_end) { |
| 88 | len = prtd->dma_end - pos; |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 89 | pr_debug(KERN_DEBUG "%s: corrected dma len %ld\n", |
Harvey Harrison | 9bf8e7d | 2008-03-03 15:32:18 -0800 | [diff] [blame] | 90 | __func__, len); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 91 | } |
| 92 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 93 | ret = s3c2410_dma_enqueue(prtd->params->channel, |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 94 | substream, pos, len); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 95 | |
| 96 | if (ret == 0) { |
| 97 | prtd->dma_loaded++; |
| 98 | pos += prtd->dma_period; |
| 99 | if (pos >= prtd->dma_end) |
| 100 | pos = prtd->dma_start; |
| 101 | } else |
| 102 | break; |
| 103 | } |
| 104 | |
| 105 | prtd->dma_pos = pos; |
| 106 | } |
| 107 | |
| 108 | static void s3c24xx_audio_buffdone(struct s3c2410_dma_chan *channel, |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 109 | void *dev_id, int size, |
| 110 | enum s3c2410_dma_buffresult result) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 111 | { |
| 112 | struct snd_pcm_substream *substream = dev_id; |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 113 | struct s3c24xx_runtime_data *prtd; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 114 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 115 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 116 | |
| 117 | if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR) |
| 118 | return; |
| 119 | |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 120 | prtd = substream->runtime->private_data; |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 121 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 122 | if (substream) |
| 123 | snd_pcm_period_elapsed(substream); |
| 124 | |
| 125 | spin_lock(&prtd->lock); |
| 126 | if (prtd->state & ST_RUNNING) { |
| 127 | prtd->dma_loaded--; |
Mark Brown | 2bef901 | 2008-11-14 14:40:46 +0000 | [diff] [blame] | 128 | s3c24xx_pcm_enqueue(substream); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | spin_unlock(&prtd->lock); |
| 132 | } |
| 133 | |
| 134 | static int s3c24xx_pcm_hw_params(struct snd_pcm_substream *substream, |
| 135 | struct snd_pcm_hw_params *params) |
| 136 | { |
| 137 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 138 | struct s3c24xx_runtime_data *prtd = runtime->private_data; |
| 139 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 140 | struct s3c24xx_pcm_dma_params *dma = rtd->dai->cpu_dai->dma_data; |
| 141 | unsigned long totbytes = params_buffer_bytes(params); |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 142 | int ret = 0; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 143 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 144 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 145 | |
| 146 | /* return if this is a bufferless transfer e.g. |
| 147 | * codec <--> BT codec or GSM modem -- lg FIXME */ |
| 148 | if (!dma) |
| 149 | return 0; |
| 150 | |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 151 | /* this may get called several times by oss emulation |
| 152 | * with different params -HW */ |
| 153 | if (prtd->params == NULL) { |
| 154 | /* prepare DMA */ |
| 155 | prtd->params = dma; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 156 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 157 | pr_debug("params %p, client %p, channel %d\n", prtd->params, |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 158 | prtd->params->client, prtd->params->channel); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 159 | |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 160 | ret = s3c2410_dma_request(prtd->params->channel, |
| 161 | prtd->params->client, NULL); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 162 | |
Davide Rizzo | d642617 | 2008-05-05 14:56:07 +0200 | [diff] [blame] | 163 | if (ret < 0) { |
Mark Brown | b52a519 | 2009-03-06 18:13:43 +0000 | [diff] [blame] | 164 | printk(KERN_ERR "failed to get dma channel\n"); |
Harald Welte | 646ab16 | 2007-07-24 12:49:39 +0200 | [diff] [blame] | 165 | return ret; |
| 166 | } |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 167 | } |
| 168 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 169 | s3c2410_dma_set_buffdone_fn(prtd->params->channel, |
| 170 | s3c24xx_audio_buffdone); |
| 171 | |
| 172 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 173 | |
| 174 | runtime->dma_bytes = totbytes; |
| 175 | |
| 176 | spin_lock_irq(&prtd->lock); |
| 177 | prtd->dma_loaded = 0; |
| 178 | prtd->dma_limit = runtime->hw.periods_min; |
| 179 | prtd->dma_period = params_period_bytes(params); |
| 180 | prtd->dma_start = runtime->dma_addr; |
| 181 | prtd->dma_pos = prtd->dma_start; |
| 182 | prtd->dma_end = prtd->dma_start + totbytes; |
| 183 | spin_unlock_irq(&prtd->lock); |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static int s3c24xx_pcm_hw_free(struct snd_pcm_substream *substream) |
| 189 | { |
| 190 | struct s3c24xx_runtime_data *prtd = substream->runtime->private_data; |
| 191 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 192 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 193 | |
| 194 | /* TODO - do we need to ensure DMA flushed */ |
| 195 | snd_pcm_set_runtime_buffer(substream, NULL); |
| 196 | |
Graeme Gregory | 7f1bc26 | 2007-04-17 12:35:18 +0200 | [diff] [blame] | 197 | if (prtd->params) { |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 198 | s3c2410_dma_free(prtd->params->channel, prtd->params->client); |
| 199 | prtd->params = NULL; |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | static int s3c24xx_pcm_prepare(struct snd_pcm_substream *substream) |
| 206 | { |
| 207 | struct s3c24xx_runtime_data *prtd = substream->runtime->private_data; |
| 208 | int ret = 0; |
| 209 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 210 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 211 | |
| 212 | /* return if this is a bufferless transfer e.g. |
| 213 | * codec <--> BT codec or GSM modem -- lg FIXME */ |
| 214 | if (!prtd->params) |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 215 | return 0; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 216 | |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 217 | /* channel needs configuring for mem=>device, increment memory addr, |
| 218 | * sync to pclk, half-word transfers to the IIS-FIFO. */ |
| 219 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 220 | s3c2410_dma_devconfig(prtd->params->channel, |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame^] | 221 | S3C2410_DMASRC_MEM, |
| 222 | prtd->params->dma_addr); |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 223 | } else { |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 224 | s3c2410_dma_devconfig(prtd->params->channel, |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame^] | 225 | S3C2410_DMASRC_HW, |
| 226 | prtd->params->dma_addr); |
Graeme Gregory | 96d90e1 | 2008-01-10 14:44:24 +0100 | [diff] [blame] | 227 | } |
| 228 | |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame^] | 229 | s3c2410_dma_config(prtd->params->channel, |
| 230 | prtd->params->dma_size); |
| 231 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 232 | /* flush the DMA channel */ |
| 233 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH); |
| 234 | prtd->dma_loaded = 0; |
| 235 | prtd->dma_pos = prtd->dma_start; |
| 236 | |
| 237 | /* enqueue dma buffers */ |
Mark Brown | 2bef901 | 2008-11-14 14:40:46 +0000 | [diff] [blame] | 238 | s3c24xx_pcm_enqueue(substream); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 239 | |
| 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | static int s3c24xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 244 | { |
| 245 | struct s3c24xx_runtime_data *prtd = substream->runtime->private_data; |
| 246 | int ret = 0; |
| 247 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 248 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 249 | |
| 250 | spin_lock(&prtd->lock); |
| 251 | |
| 252 | switch (cmd) { |
| 253 | case SNDRV_PCM_TRIGGER_START: |
| 254 | case SNDRV_PCM_TRIGGER_RESUME: |
| 255 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 256 | prtd->state |= ST_RUNNING; |
| 257 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START); |
| 258 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STARTED); |
| 259 | break; |
| 260 | |
| 261 | case SNDRV_PCM_TRIGGER_STOP: |
| 262 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 263 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 264 | prtd->state &= ~ST_RUNNING; |
| 265 | s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP); |
| 266 | break; |
| 267 | |
| 268 | default: |
| 269 | ret = -EINVAL; |
| 270 | break; |
| 271 | } |
| 272 | |
| 273 | spin_unlock(&prtd->lock); |
| 274 | |
| 275 | return ret; |
| 276 | } |
| 277 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 278 | static snd_pcm_uframes_t |
| 279 | s3c24xx_pcm_pointer(struct snd_pcm_substream *substream) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 280 | { |
| 281 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 282 | struct s3c24xx_runtime_data *prtd = runtime->private_data; |
| 283 | unsigned long res; |
| 284 | dma_addr_t src, dst; |
| 285 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 286 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 287 | |
| 288 | spin_lock(&prtd->lock); |
| 289 | s3c2410_dma_getposition(prtd->params->channel, &src, &dst); |
| 290 | |
| 291 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 292 | res = dst - prtd->dma_start; |
| 293 | else |
| 294 | res = src - prtd->dma_start; |
| 295 | |
| 296 | spin_unlock(&prtd->lock); |
| 297 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 298 | pr_debug("Pointer %x %x\n", src, dst); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 299 | |
| 300 | /* we seem to be getting the odd error from the pcm library due |
| 301 | * to out-of-bounds pointers. this is maybe due to the dma engine |
| 302 | * not having loaded the new values for the channel before being |
| 303 | * callled... (todo - fix ) |
| 304 | */ |
| 305 | |
| 306 | if (res >= snd_pcm_lib_buffer_bytes(substream)) { |
| 307 | if (res == snd_pcm_lib_buffer_bytes(substream)) |
| 308 | res = 0; |
| 309 | } |
| 310 | |
| 311 | return bytes_to_frames(substream->runtime, res); |
| 312 | } |
| 313 | |
| 314 | static int s3c24xx_pcm_open(struct snd_pcm_substream *substream) |
| 315 | { |
| 316 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 317 | struct s3c24xx_runtime_data *prtd; |
| 318 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 319 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 320 | |
| 321 | snd_soc_set_runtime_hwparams(substream, &s3c24xx_pcm_hardware); |
| 322 | |
| 323 | prtd = kzalloc(sizeof(struct s3c24xx_runtime_data), GFP_KERNEL); |
| 324 | if (prtd == NULL) |
| 325 | return -ENOMEM; |
| 326 | |
Zoltan Devai | c72816b | 2007-05-22 16:17:05 +0200 | [diff] [blame] | 327 | spin_lock_init(&prtd->lock); |
| 328 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 329 | runtime->private_data = prtd; |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static int s3c24xx_pcm_close(struct snd_pcm_substream *substream) |
| 334 | { |
| 335 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 336 | struct s3c24xx_runtime_data *prtd = runtime->private_data; |
| 337 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 338 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 339 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 340 | if (!prtd) |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 341 | pr_debug("s3c24xx_pcm_close called with prtd == NULL\n"); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 342 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 343 | kfree(prtd); |
| 344 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | static int s3c24xx_pcm_mmap(struct snd_pcm_substream *substream, |
| 349 | struct vm_area_struct *vma) |
| 350 | { |
| 351 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 352 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 353 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 354 | |
| 355 | return dma_mmap_writecombine(substream->pcm->card->dev, vma, |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 356 | runtime->dma_area, |
| 357 | runtime->dma_addr, |
| 358 | runtime->dma_bytes); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | static struct snd_pcm_ops s3c24xx_pcm_ops = { |
| 362 | .open = s3c24xx_pcm_open, |
| 363 | .close = s3c24xx_pcm_close, |
| 364 | .ioctl = snd_pcm_lib_ioctl, |
| 365 | .hw_params = s3c24xx_pcm_hw_params, |
| 366 | .hw_free = s3c24xx_pcm_hw_free, |
| 367 | .prepare = s3c24xx_pcm_prepare, |
| 368 | .trigger = s3c24xx_pcm_trigger, |
| 369 | .pointer = s3c24xx_pcm_pointer, |
| 370 | .mmap = s3c24xx_pcm_mmap, |
| 371 | }; |
| 372 | |
| 373 | static int s3c24xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
| 374 | { |
| 375 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 376 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 377 | size_t size = s3c24xx_pcm_hardware.buffer_bytes_max; |
| 378 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 379 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 380 | |
| 381 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 382 | buf->dev.dev = pcm->card->dev; |
| 383 | buf->private_data = NULL; |
| 384 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, |
| 385 | &buf->addr, GFP_KERNEL); |
| 386 | if (!buf->area) |
| 387 | return -ENOMEM; |
| 388 | buf->bytes = size; |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | static void s3c24xx_pcm_free_dma_buffers(struct snd_pcm *pcm) |
| 393 | { |
| 394 | struct snd_pcm_substream *substream; |
| 395 | struct snd_dma_buffer *buf; |
| 396 | int stream; |
| 397 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 398 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 399 | |
| 400 | for (stream = 0; stream < 2; stream++) { |
| 401 | substream = pcm->streams[stream].substream; |
| 402 | if (!substream) |
| 403 | continue; |
| 404 | |
| 405 | buf = &substream->dma_buffer; |
| 406 | if (!buf->area) |
| 407 | continue; |
| 408 | |
| 409 | dma_free_writecombine(pcm->card->dev, buf->bytes, |
| 410 | buf->area, buf->addr); |
| 411 | buf->area = NULL; |
| 412 | } |
| 413 | } |
| 414 | |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 415 | static u64 s3c24xx_pcm_dmamask = DMA_BIT_MASK(32); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 416 | |
Mark Brown | 5111c07 | 2008-04-30 17:19:32 +0200 | [diff] [blame] | 417 | static int s3c24xx_pcm_new(struct snd_card *card, |
Liam Girdwood | 1992a6f | 2008-07-07 16:08:24 +0100 | [diff] [blame] | 418 | struct snd_soc_dai *dai, struct snd_pcm *pcm) |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 419 | { |
| 420 | int ret = 0; |
| 421 | |
Mark Brown | ee7d476 | 2009-03-06 18:04:34 +0000 | [diff] [blame] | 422 | pr_debug("Entered %s\n", __func__); |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 423 | |
| 424 | if (!card->dev->dma_mask) |
| 425 | card->dev->dma_mask = &s3c24xx_pcm_dmamask; |
| 426 | if (!card->dev->coherent_dma_mask) |
| 427 | card->dev->coherent_dma_mask = 0xffffffff; |
| 428 | |
| 429 | if (dai->playback.channels_min) { |
| 430 | ret = s3c24xx_pcm_preallocate_dma_buffer(pcm, |
| 431 | SNDRV_PCM_STREAM_PLAYBACK); |
| 432 | if (ret) |
| 433 | goto out; |
| 434 | } |
| 435 | |
| 436 | if (dai->capture.channels_min) { |
| 437 | ret = s3c24xx_pcm_preallocate_dma_buffer(pcm, |
| 438 | SNDRV_PCM_STREAM_CAPTURE); |
| 439 | if (ret) |
| 440 | goto out; |
| 441 | } |
| 442 | out: |
| 443 | return ret; |
| 444 | } |
| 445 | |
| 446 | struct snd_soc_platform s3c24xx_soc_platform = { |
| 447 | .name = "s3c24xx-audio", |
| 448 | .pcm_ops = &s3c24xx_pcm_ops, |
| 449 | .pcm_new = s3c24xx_pcm_new, |
| 450 | .pcm_free = s3c24xx_pcm_free_dma_buffers, |
| 451 | }; |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 452 | EXPORT_SYMBOL_GPL(s3c24xx_soc_platform); |
| 453 | |
Takashi Iwai | c9b3a40 | 2008-12-10 07:47:22 +0100 | [diff] [blame] | 454 | static int __init s3c24xx_soc_platform_init(void) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 455 | { |
| 456 | return snd_soc_register_platform(&s3c24xx_soc_platform); |
| 457 | } |
| 458 | module_init(s3c24xx_soc_platform_init); |
| 459 | |
| 460 | static void __exit s3c24xx_soc_platform_exit(void) |
| 461 | { |
| 462 | snd_soc_unregister_platform(&s3c24xx_soc_platform); |
| 463 | } |
| 464 | module_exit(s3c24xx_soc_platform_exit); |
| 465 | |
Ben Dooks | c0f41bb | 2007-02-14 13:20:03 +0100 | [diff] [blame] | 466 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); |
| 467 | MODULE_DESCRIPTION("Samsung S3C24XX PCM DMA module"); |
| 468 | MODULE_LICENSE("GPL"); |