Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * ALSA PCM interface for the Stetch s6000 family |
| 3 | * |
| 4 | * Author: Daniel Gloeckner, <dg@emlix.com> |
| 5 | * Copyright: (C) 2009 emlix GmbH <info@emlix.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/platform_device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/interrupt.h> |
| 18 | |
| 19 | #include <sound/core.h> |
| 20 | #include <sound/pcm.h> |
| 21 | #include <sound/pcm_params.h> |
| 22 | #include <sound/soc.h> |
| 23 | |
| 24 | #include <asm/dma.h> |
| 25 | #include <variant/dmac.h> |
| 26 | |
| 27 | #include "s6000-pcm.h" |
| 28 | |
| 29 | #define S6_PCM_PREALLOCATE_SIZE (96 * 1024) |
| 30 | #define S6_PCM_PREALLOCATE_MAX (2048 * 1024) |
| 31 | |
| 32 | static struct snd_pcm_hardware s6000_pcm_hardware = { |
| 33 | .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 34 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | |
| 35 | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_JOINT_DUPLEX), |
| 36 | .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE), |
| 37 | .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_5512 | \ |
| 38 | SNDRV_PCM_RATE_8000_192000), |
| 39 | .rate_min = 0, |
| 40 | .rate_max = 1562500, |
| 41 | .channels_min = 2, |
| 42 | .channels_max = 8, |
| 43 | .buffer_bytes_max = 0x7ffffff0, |
| 44 | .period_bytes_min = 16, |
| 45 | .period_bytes_max = 0xfffff0, |
| 46 | .periods_min = 2, |
| 47 | .periods_max = 1024, /* no limit */ |
| 48 | .fifo_size = 0, |
| 49 | }; |
| 50 | |
| 51 | struct s6000_runtime_data { |
| 52 | spinlock_t lock; |
| 53 | int period; /* current DMA period */ |
| 54 | }; |
| 55 | |
| 56 | static void s6000_pcm_enqueue_dma(struct snd_pcm_substream *substream) |
| 57 | { |
| 58 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 59 | struct s6000_runtime_data *prtd = runtime->private_data; |
| 60 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 61 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 62 | int channel; |
| 63 | unsigned int period_size; |
| 64 | unsigned int dma_offset; |
| 65 | dma_addr_t dma_pos; |
| 66 | dma_addr_t src, dst; |
| 67 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 68 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 69 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 70 | period_size = snd_pcm_lib_period_bytes(substream); |
| 71 | dma_offset = prtd->period * period_size; |
| 72 | dma_pos = runtime->dma_addr + dma_offset; |
| 73 | |
| 74 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 75 | src = dma_pos; |
| 76 | dst = par->sif_out; |
| 77 | channel = par->dma_out; |
| 78 | } else { |
| 79 | src = par->sif_in; |
| 80 | dst = dma_pos; |
| 81 | channel = par->dma_in; |
| 82 | } |
| 83 | |
| 84 | if (!s6dmac_channel_enabled(DMA_MASK_DMAC(channel), |
| 85 | DMA_INDEX_CHNL(channel))) |
| 86 | return; |
| 87 | |
| 88 | if (s6dmac_fifo_full(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel))) { |
| 89 | printk(KERN_ERR "s6000-pcm: fifo full\n"); |
| 90 | return; |
| 91 | } |
| 92 | |
| 93 | BUG_ON(period_size & 15); |
| 94 | s6dmac_put_fifo(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel), |
| 95 | src, dst, period_size); |
| 96 | |
| 97 | prtd->period++; |
| 98 | if (unlikely(prtd->period >= runtime->periods)) |
| 99 | prtd->period = 0; |
| 100 | } |
| 101 | |
| 102 | static irqreturn_t s6000_pcm_irq(int irq, void *data) |
| 103 | { |
| 104 | struct snd_pcm *pcm = data; |
| 105 | struct snd_soc_pcm_runtime *runtime = pcm->private_data; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 106 | struct s6000_runtime_data *prtd; |
| 107 | unsigned int has_xrun; |
| 108 | int i, ret = IRQ_NONE; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 109 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 110 | for (i = 0; i < 2; ++i) { |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 111 | struct snd_pcm_substream *substream = pcm->streams[i].substream; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 112 | struct s6000_pcm_dma_params *params = |
| 113 | snd_soc_dai_get_dma_data(runtime->cpu_dai, substream); |
| 114 | u32 channel; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 115 | unsigned int pending; |
| 116 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 117 | if (substream == SNDRV_PCM_STREAM_PLAYBACK) |
| 118 | channel = params->dma_out; |
| 119 | else |
| 120 | channel = params->dma_in; |
| 121 | |
| 122 | has_xrun = params->check_xrun(runtime->cpu_dai); |
| 123 | |
| 124 | if (!channel) |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 125 | continue; |
| 126 | |
| 127 | if (unlikely(has_xrun & (1 << i)) && |
| 128 | substream->runtime && |
| 129 | snd_pcm_running(substream)) { |
| 130 | dev_dbg(pcm->dev, "xrun\n"); |
| 131 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| 132 | ret = IRQ_HANDLED; |
| 133 | } |
| 134 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 135 | pending = s6dmac_int_sources(DMA_MASK_DMAC(channel), |
| 136 | DMA_INDEX_CHNL(channel)); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 137 | |
| 138 | if (pending & 1) { |
| 139 | ret = IRQ_HANDLED; |
| 140 | if (likely(substream->runtime && |
| 141 | snd_pcm_running(substream))) { |
| 142 | snd_pcm_period_elapsed(substream); |
| 143 | dev_dbg(pcm->dev, "period elapsed %x %x\n", |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 144 | s6dmac_cur_src(DMA_MASK_DMAC(channel), |
| 145 | DMA_INDEX_CHNL(channel)), |
| 146 | s6dmac_cur_dst(DMA_MASK_DMAC(channel), |
| 147 | DMA_INDEX_CHNL(channel))); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 148 | prtd = substream->runtime->private_data; |
| 149 | spin_lock(&prtd->lock); |
| 150 | s6000_pcm_enqueue_dma(substream); |
| 151 | spin_unlock(&prtd->lock); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | if (unlikely(pending & ~7)) { |
| 156 | if (pending & (1 << 3)) |
| 157 | printk(KERN_WARNING |
| 158 | "s6000-pcm: DMA %x Underflow\n", |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 159 | channel); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 160 | if (pending & (1 << 4)) |
| 161 | printk(KERN_WARNING |
| 162 | "s6000-pcm: DMA %x Overflow\n", |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 163 | channel); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 164 | if (pending & 0x1e0) |
| 165 | printk(KERN_WARNING |
| 166 | "s6000-pcm: DMA %x Master Error " |
| 167 | "(mask %x)\n", |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 168 | channel, pending >> 5); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 169 | |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | return ret; |
| 174 | } |
| 175 | |
| 176 | static int s6000_pcm_start(struct snd_pcm_substream *substream) |
| 177 | { |
| 178 | struct s6000_runtime_data *prtd = substream->runtime->private_data; |
| 179 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 180 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 181 | unsigned long flags; |
| 182 | int srcinc; |
| 183 | u32 dma; |
| 184 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 185 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 186 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 187 | spin_lock_irqsave(&prtd->lock, flags); |
| 188 | |
| 189 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 190 | srcinc = 1; |
| 191 | dma = par->dma_out; |
| 192 | } else { |
| 193 | srcinc = 0; |
| 194 | dma = par->dma_in; |
| 195 | } |
| 196 | s6dmac_enable_chan(DMA_MASK_DMAC(dma), DMA_INDEX_CHNL(dma), |
| 197 | 1 /* priority 1 (0 is max) */, |
| 198 | 0 /* peripheral requests w/o xfer length mode */, |
| 199 | srcinc /* source address increment */, |
| 200 | srcinc^1 /* destination address increment */, |
| 201 | 0 /* chunksize 0 (skip impossible on this dma) */, |
| 202 | 0 /* source skip after chunk (impossible) */, |
| 203 | 0 /* destination skip after chunk (impossible) */, |
| 204 | 4 /* 16 byte burst size */, |
| 205 | -1 /* don't conserve bandwidth */, |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 206 | 0 /* low watermark irq descriptor threshold */, |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 207 | 0 /* disable hardware timestamps */, |
| 208 | 1 /* enable channel */); |
| 209 | |
| 210 | s6000_pcm_enqueue_dma(substream); |
| 211 | s6000_pcm_enqueue_dma(substream); |
| 212 | |
| 213 | spin_unlock_irqrestore(&prtd->lock, flags); |
| 214 | |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | static int s6000_pcm_stop(struct snd_pcm_substream *substream) |
| 219 | { |
| 220 | struct s6000_runtime_data *prtd = substream->runtime->private_data; |
| 221 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 222 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 223 | unsigned long flags; |
| 224 | u32 channel; |
| 225 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 226 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 227 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 228 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 229 | channel = par->dma_out; |
| 230 | else |
| 231 | channel = par->dma_in; |
| 232 | |
| 233 | s6dmac_set_terminal_count(DMA_MASK_DMAC(channel), |
| 234 | DMA_INDEX_CHNL(channel), 0); |
| 235 | |
| 236 | spin_lock_irqsave(&prtd->lock, flags); |
| 237 | |
| 238 | s6dmac_disable_chan(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel)); |
| 239 | |
| 240 | spin_unlock_irqrestore(&prtd->lock, flags); |
| 241 | |
| 242 | return 0; |
| 243 | } |
| 244 | |
| 245 | static int s6000_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 246 | { |
| 247 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 248 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 249 | int ret; |
| 250 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 251 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 252 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 253 | ret = par->trigger(substream, cmd, 0); |
| 254 | if (ret < 0) |
| 255 | return ret; |
| 256 | |
| 257 | switch (cmd) { |
| 258 | case SNDRV_PCM_TRIGGER_START: |
| 259 | case SNDRV_PCM_TRIGGER_RESUME: |
| 260 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 261 | ret = s6000_pcm_start(substream); |
| 262 | break; |
| 263 | case SNDRV_PCM_TRIGGER_STOP: |
| 264 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 265 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 266 | ret = s6000_pcm_stop(substream); |
| 267 | break; |
| 268 | default: |
| 269 | ret = -EINVAL; |
| 270 | } |
| 271 | if (ret < 0) |
| 272 | return ret; |
| 273 | |
| 274 | return par->trigger(substream, cmd, 1); |
| 275 | } |
| 276 | |
| 277 | static int s6000_pcm_prepare(struct snd_pcm_substream *substream) |
| 278 | { |
| 279 | struct s6000_runtime_data *prtd = substream->runtime->private_data; |
| 280 | |
| 281 | prtd->period = 0; |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | static snd_pcm_uframes_t s6000_pcm_pointer(struct snd_pcm_substream *substream) |
| 287 | { |
| 288 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 289 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 290 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 291 | struct s6000_runtime_data *prtd = runtime->private_data; |
| 292 | unsigned long flags; |
| 293 | unsigned int offset; |
| 294 | dma_addr_t count; |
| 295 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 296 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 297 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 298 | spin_lock_irqsave(&prtd->lock, flags); |
| 299 | |
| 300 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 301 | count = s6dmac_cur_src(DMA_MASK_DMAC(par->dma_out), |
| 302 | DMA_INDEX_CHNL(par->dma_out)); |
| 303 | else |
| 304 | count = s6dmac_cur_dst(DMA_MASK_DMAC(par->dma_in), |
| 305 | DMA_INDEX_CHNL(par->dma_in)); |
| 306 | |
| 307 | count -= runtime->dma_addr; |
| 308 | |
| 309 | spin_unlock_irqrestore(&prtd->lock, flags); |
| 310 | |
| 311 | offset = bytes_to_frames(runtime, count); |
| 312 | if (unlikely(offset >= runtime->buffer_size)) |
| 313 | offset = 0; |
| 314 | |
| 315 | return offset; |
| 316 | } |
| 317 | |
| 318 | static int s6000_pcm_open(struct snd_pcm_substream *substream) |
| 319 | { |
| 320 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 321 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 322 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 323 | struct s6000_runtime_data *prtd; |
| 324 | int ret; |
| 325 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 326 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 327 | snd_soc_set_runtime_hwparams(substream, &s6000_pcm_hardware); |
| 328 | |
| 329 | ret = snd_pcm_hw_constraint_step(runtime, 0, |
| 330 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 16); |
| 331 | if (ret < 0) |
| 332 | return ret; |
| 333 | ret = snd_pcm_hw_constraint_step(runtime, 0, |
| 334 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16); |
| 335 | if (ret < 0) |
| 336 | return ret; |
| 337 | ret = snd_pcm_hw_constraint_integer(runtime, |
| 338 | SNDRV_PCM_HW_PARAM_PERIODS); |
| 339 | if (ret < 0) |
| 340 | return ret; |
| 341 | |
| 342 | if (par->same_rate) { |
| 343 | int rate; |
| 344 | spin_lock(&par->lock); /* needed? */ |
| 345 | rate = par->rate; |
| 346 | spin_unlock(&par->lock); |
| 347 | if (rate != -1) { |
| 348 | ret = snd_pcm_hw_constraint_minmax(runtime, |
| 349 | SNDRV_PCM_HW_PARAM_RATE, |
| 350 | rate, rate); |
| 351 | if (ret < 0) |
| 352 | return ret; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | prtd = kzalloc(sizeof(struct s6000_runtime_data), GFP_KERNEL); |
| 357 | if (prtd == NULL) |
| 358 | return -ENOMEM; |
| 359 | |
| 360 | spin_lock_init(&prtd->lock); |
| 361 | |
| 362 | runtime->private_data = prtd; |
| 363 | |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | static int s6000_pcm_close(struct snd_pcm_substream *substream) |
| 368 | { |
| 369 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 370 | struct s6000_runtime_data *prtd = runtime->private_data; |
| 371 | |
| 372 | kfree(prtd); |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | static int s6000_pcm_hw_params(struct snd_pcm_substream *substream, |
| 378 | struct snd_pcm_hw_params *hw_params) |
| 379 | { |
| 380 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 381 | struct s6000_pcm_dma_params *par; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 382 | int ret; |
| 383 | ret = snd_pcm_lib_malloc_pages(substream, |
| 384 | params_buffer_bytes(hw_params)); |
| 385 | if (ret < 0) { |
| 386 | printk(KERN_WARNING "s6000-pcm: allocation of memory failed\n"); |
| 387 | return ret; |
| 388 | } |
| 389 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 390 | par = snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 391 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 392 | if (par->same_rate) { |
| 393 | spin_lock(&par->lock); |
| 394 | if (par->rate == -1 || |
| 395 | !(par->in_use & ~(1 << substream->stream))) { |
| 396 | par->rate = params_rate(hw_params); |
| 397 | par->in_use |= 1 << substream->stream; |
| 398 | } else if (params_rate(hw_params) != par->rate) { |
| 399 | snd_pcm_lib_free_pages(substream); |
| 400 | par->in_use &= ~(1 << substream->stream); |
| 401 | ret = -EBUSY; |
| 402 | } |
| 403 | spin_unlock(&par->lock); |
| 404 | } |
| 405 | return ret; |
| 406 | } |
| 407 | |
| 408 | static int s6000_pcm_hw_free(struct snd_pcm_substream *substream) |
| 409 | { |
| 410 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 411 | struct s6000_pcm_dma_params *par = |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 412 | snd_soc_dai_get_dma_data(soc_runtime->cpu_dai, substream); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 413 | |
| 414 | spin_lock(&par->lock); |
| 415 | par->in_use &= ~(1 << substream->stream); |
| 416 | if (!par->in_use) |
| 417 | par->rate = -1; |
| 418 | spin_unlock(&par->lock); |
| 419 | |
| 420 | return snd_pcm_lib_free_pages(substream); |
| 421 | } |
| 422 | |
| 423 | static struct snd_pcm_ops s6000_pcm_ops = { |
| 424 | .open = s6000_pcm_open, |
| 425 | .close = s6000_pcm_close, |
| 426 | .ioctl = snd_pcm_lib_ioctl, |
| 427 | .hw_params = s6000_pcm_hw_params, |
| 428 | .hw_free = s6000_pcm_hw_free, |
| 429 | .trigger = s6000_pcm_trigger, |
| 430 | .prepare = s6000_pcm_prepare, |
| 431 | .pointer = s6000_pcm_pointer, |
| 432 | }; |
| 433 | |
| 434 | static void s6000_pcm_free(struct snd_pcm *pcm) |
| 435 | { |
| 436 | struct snd_soc_pcm_runtime *runtime = pcm->private_data; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 437 | struct s6000_pcm_dma_params *params = |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 438 | snd_soc_dai_get_dma_data(runtime->cpu_dai, pcm->streams[0].substream); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 439 | |
| 440 | free_irq(params->irq, pcm); |
| 441 | snd_pcm_lib_preallocate_free_for_all(pcm); |
| 442 | } |
| 443 | |
Marin Mitov | f9ede4e | 2009-11-16 21:39:26 +0200 | [diff] [blame] | 444 | static u64 s6000_pcm_dmamask = DMA_BIT_MASK(32); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 445 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 446 | static int s6000_pcm_new(struct snd_soc_pcm_runtime *runtime) |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 447 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 448 | struct snd_card *card = runtime->card->snd_card; |
| 449 | struct snd_soc_dai *dai = runtime->cpu_dai; |
| 450 | struct snd_pcm *pcm = runtime->pcm; |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 451 | struct s6000_pcm_dma_params *params; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 452 | int res; |
| 453 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 454 | params = snd_soc_dai_get_dma_data(runtime->cpu_dai, |
| 455 | pcm->streams[0].substream); |
Daniel Mack | 5f712b2 | 2010-03-22 10:11:15 +0100 | [diff] [blame] | 456 | |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 457 | if (!card->dev->dma_mask) |
| 458 | card->dev->dma_mask = &s6000_pcm_dmamask; |
| 459 | if (!card->dev->coherent_dma_mask) |
Marin Mitov | f9ede4e | 2009-11-16 21:39:26 +0200 | [diff] [blame] | 460 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 461 | |
| 462 | if (params->dma_in) { |
| 463 | s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_in), |
| 464 | DMA_INDEX_CHNL(params->dma_in)); |
| 465 | s6dmac_int_sources(DMA_MASK_DMAC(params->dma_in), |
| 466 | DMA_INDEX_CHNL(params->dma_in)); |
| 467 | } |
| 468 | |
| 469 | if (params->dma_out) { |
| 470 | s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_out), |
| 471 | DMA_INDEX_CHNL(params->dma_out)); |
| 472 | s6dmac_int_sources(DMA_MASK_DMAC(params->dma_out), |
| 473 | DMA_INDEX_CHNL(params->dma_out)); |
| 474 | } |
| 475 | |
| 476 | res = request_irq(params->irq, s6000_pcm_irq, IRQF_SHARED, |
Daniel Glöckner | 9e4ea71 | 2010-11-30 01:00:17 +0100 | [diff] [blame] | 477 | "s6000-audio", pcm); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 478 | if (res) { |
| 479 | printk(KERN_ERR "s6000-pcm couldn't get IRQ\n"); |
| 480 | return res; |
| 481 | } |
| 482 | |
| 483 | res = snd_pcm_lib_preallocate_pages_for_all(pcm, |
| 484 | SNDRV_DMA_TYPE_DEV, |
| 485 | card->dev, |
| 486 | S6_PCM_PREALLOCATE_SIZE, |
| 487 | S6_PCM_PREALLOCATE_MAX); |
| 488 | if (res) |
| 489 | printk(KERN_WARNING "s6000-pcm: preallocation failed\n"); |
| 490 | |
| 491 | spin_lock_init(¶ms->lock); |
| 492 | params->in_use = 0; |
| 493 | params->rate = -1; |
| 494 | return 0; |
| 495 | } |
| 496 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 497 | static struct snd_soc_platform_driver s6000_soc_platform = { |
| 498 | .ops = &s6000_pcm_ops, |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 499 | .pcm_new = s6000_pcm_new, |
| 500 | .pcm_free = s6000_pcm_free, |
| 501 | }; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 502 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 503 | static int __devinit s6000_soc_platform_probe(struct platform_device *pdev) |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 504 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 505 | return snd_soc_register_platform(&pdev->dev, &s6000_soc_platform); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 506 | } |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 507 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 508 | static int __devexit s6000_soc_platform_remove(struct platform_device *pdev) |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 509 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 510 | snd_soc_unregister_platform(&pdev->dev); |
| 511 | return 0; |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 512 | } |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 513 | |
| 514 | static struct platform_driver s6000_pcm_driver = { |
| 515 | .driver = { |
| 516 | .name = "s6000-pcm-audio", |
| 517 | .owner = THIS_MODULE, |
| 518 | }, |
| 519 | |
| 520 | .probe = s6000_soc_platform_probe, |
| 521 | .remove = __devexit_p(s6000_soc_platform_remove), |
| 522 | }; |
| 523 | |
| 524 | static int __init snd_s6000_pcm_init(void) |
| 525 | { |
| 526 | return platform_driver_register(&s6000_pcm_driver); |
| 527 | } |
| 528 | module_init(snd_s6000_pcm_init); |
| 529 | |
| 530 | static void __exit snd_s6000_pcm_exit(void) |
| 531 | { |
| 532 | platform_driver_unregister(&s6000_pcm_driver); |
| 533 | } |
| 534 | module_exit(snd_s6000_pcm_exit); |
Daniel Glöckner | 4b166da | 2009-03-28 19:47:01 +0100 | [diff] [blame] | 535 | |
| 536 | MODULE_AUTHOR("Daniel Gloeckner"); |
| 537 | MODULE_DESCRIPTION("Stretch s6000 family PCM DMA module"); |
| 538 | MODULE_LICENSE("GPL"); |