Blame view
sound/arm/pxa2xx-pcm-lib.c
7.31 KB
a6d773176 ALSA: Separate co... |
1 2 3 4 5 |
/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ |
5a0e3ad6a include cleanup: ... |
6 |
#include <linux/slab.h> |
a6d773176 ALSA: Separate co... |
7 8 9 10 11 12 13 |
#include <linux/module.h> #include <linux/dma-mapping.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/pxa2xx-lib.h> |
5742964e9 [ARM] pxa: remove... |
14 |
#include <mach/dma.h> |
a6d773176 ALSA: Separate co... |
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 |
#include "pxa2xx-pcm.h" static const struct snd_pcm_hardware pxa2xx_pcm_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, .period_bytes_min = 32, .period_bytes_max = 8192 - 32, .periods_min = 1, .periods_max = PAGE_SIZE/sizeof(pxa_dma_desc), .buffer_bytes_max = 128 * 1024, .fifo_size = 32, }; int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_pcm_runtime *runtime = substream->runtime; struct pxa2xx_runtime_data *rtd = runtime->private_data; size_t totsize = params_buffer_bytes(params); size_t period = params_period_bytes(params); pxa_dma_desc *dma_desc; dma_addr_t dma_buff_phys, next_desc_phys; snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); runtime->dma_bytes = totsize; dma_desc = rtd->dma_desc_array; next_desc_phys = rtd->dma_desc_array_phys; dma_buff_phys = runtime->dma_addr; do { next_desc_phys += sizeof(pxa_dma_desc); dma_desc->ddadr = next_desc_phys; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { dma_desc->dsadr = dma_buff_phys; dma_desc->dtadr = rtd->params->dev_addr; } else { dma_desc->dsadr = rtd->params->dev_addr; dma_desc->dtadr = dma_buff_phys; } if (period > totsize) period = totsize; dma_desc->dcmd = rtd->params->dcmd | period | DCMD_ENDIRQEN; dma_desc++; dma_buff_phys += period; } while (totsize -= period); dma_desc[-1].ddadr = rtd->dma_desc_array_phys; return 0; } EXPORT_SYMBOL(__pxa2xx_pcm_hw_params); int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream) { struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; |
b7d4de7ff ASoC: Fix NULL po... |
76 |
if (rtd && rtd->params && rtd->params->drcmr) |
a6d773176 ALSA: Separate co... |
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 |
*rtd->params->drcmr = 0; snd_pcm_set_runtime_buffer(substream, NULL); return 0; } EXPORT_SYMBOL(__pxa2xx_pcm_hw_free); int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; int ret = 0; switch (cmd) { case SNDRV_PCM_TRIGGER_START: DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys; DCSR(prtd->dma_ch) = DCSR_RUN; break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: DCSR(prtd->dma_ch) &= ~DCSR_RUN; break; case SNDRV_PCM_TRIGGER_RESUME: DCSR(prtd->dma_ch) |= DCSR_RUN; break; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: DDADR(prtd->dma_ch) = prtd->dma_desc_array_phys; DCSR(prtd->dma_ch) |= DCSR_RUN; break; default: ret = -EINVAL; } return ret; } EXPORT_SYMBOL(pxa2xx_pcm_trigger); snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct pxa2xx_runtime_data *prtd = runtime->private_data; dma_addr_t ptr = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? DSADR(prtd->dma_ch) : DTADR(prtd->dma_ch); snd_pcm_uframes_t x = bytes_to_frames(runtime, ptr - runtime->dma_addr); if (x == runtime->buffer_size) x = 0; return x; } EXPORT_SYMBOL(pxa2xx_pcm_pointer); int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream) { struct pxa2xx_runtime_data *prtd = substream->runtime->private_data; |
f8bae4caa ALSA: Restore sup... |
136 137 |
if (!prtd || !prtd->params) return 0; |
97c96c076 ASoC: PXA: Fix oo... |
138 139 |
if (prtd->dma_ch == -1) return -EINVAL; |
a6d773176 ALSA: Separate co... |
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 |
DCSR(prtd->dma_ch) &= ~DCSR_RUN; DCSR(prtd->dma_ch) = 0; DCMD(prtd->dma_ch) = 0; *prtd->params->drcmr = prtd->dma_ch | DRCMR_MAPVLD; return 0; } EXPORT_SYMBOL(__pxa2xx_pcm_prepare); void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id) { struct snd_pcm_substream *substream = dev_id; struct pxa2xx_runtime_data *rtd = substream->runtime->private_data; int dcsr; dcsr = DCSR(dma_ch); DCSR(dma_ch) = dcsr & ~DCSR_STOPIRQEN; if (dcsr & DCSR_ENDINTR) { snd_pcm_period_elapsed(substream); } else { printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x) ", rtd->params->name, dma_ch, dcsr); snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); } } EXPORT_SYMBOL(pxa2xx_pcm_dma_irq); int __pxa2xx_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct pxa2xx_runtime_data *rtd; int ret; runtime->hw = pxa2xx_pcm_hardware; /* * For mysterious reasons (and despite what the manual says) * playback samples are lost if the DMA count is not a multiple * of the DMA burst size. Let's add a rule to enforce that. */ ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32); if (ret) goto out; ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32); if (ret) goto out; ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); if (ret < 0) goto out; ret = -ENOMEM; |
13095c37b ALSA: Ensure PXA ... |
198 |
rtd = kzalloc(sizeof(*rtd), GFP_KERNEL); |
a6d773176 ALSA: Separate co... |
199 200 201 202 203 204 205 |
if (!rtd) goto out; rtd->dma_desc_array = dma_alloc_writecombine(substream->pcm->card->dev, PAGE_SIZE, &rtd->dma_desc_array_phys, GFP_KERNEL); if (!rtd->dma_desc_array) goto err1; |
8727b909b ASoC: pxa-pcm-lib... |
206 |
rtd->dma_ch = -1; |
a6d773176 ALSA: Separate co... |
207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 |
runtime->private_data = rtd; return 0; err1: kfree(rtd); out: return ret; } EXPORT_SYMBOL(__pxa2xx_pcm_open); int __pxa2xx_pcm_close(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct pxa2xx_runtime_data *rtd = runtime->private_data; dma_free_writecombine(substream->pcm->card->dev, PAGE_SIZE, rtd->dma_desc_array, rtd->dma_desc_array_phys); kfree(rtd); return 0; } EXPORT_SYMBOL(__pxa2xx_pcm_close); int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma) { struct snd_pcm_runtime *runtime = substream->runtime; return dma_mmap_writecombine(substream->pcm->card->dev, vma, runtime->dma_area, runtime->dma_addr, runtime->dma_bytes); } EXPORT_SYMBOL(pxa2xx_pcm_mmap); int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) { struct snd_pcm_substream *substream = pcm->streams[stream].substream; struct snd_dma_buffer *buf = &substream->dma_buffer; size_t size = pxa2xx_pcm_hardware.buffer_bytes_max; buf->dev.type = SNDRV_DMA_TYPE_DEV; buf->dev.dev = pcm->card->dev; buf->private_data = NULL; buf->area = dma_alloc_writecombine(pcm->card->dev, size, &buf->addr, GFP_KERNEL); if (!buf->area) return -ENOMEM; buf->bytes = size; return 0; } EXPORT_SYMBOL(pxa2xx_pcm_preallocate_dma_buffer); void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm) { struct snd_pcm_substream *substream; struct snd_dma_buffer *buf; int stream; for (stream = 0; stream < 2; stream++) { substream = pcm->streams[stream].substream; if (!substream) continue; buf = &substream->dma_buffer; if (!buf->area) continue; dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area, buf->addr); buf->area = NULL; } } EXPORT_SYMBOL(pxa2xx_pcm_free_dma_buffers); MODULE_AUTHOR("Nicolas Pitre"); MODULE_DESCRIPTION("Intel PXA2xx sound library"); MODULE_LICENSE("GPL"); |