Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 1 | /* |
| 2 | * imx-pcm-fiq.c -- ALSA Soc Audio Layer |
| 3 | * |
| 4 | * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de> |
| 5 | * |
| 6 | * This code is based on code copyrighted by Freescale, |
| 7 | * Liam Girdwood, Javier Martin and probably others. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your |
| 12 | * option) any later version. |
| 13 | */ |
| 14 | #include <linux/clk.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/dma-mapping.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 23 | |
| 24 | #include <sound/core.h> |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 25 | #include <sound/dmaengine_pcm.h> |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 26 | #include <sound/initval.h> |
| 27 | #include <sound/pcm.h> |
| 28 | #include <sound/pcm_params.h> |
| 29 | #include <sound/soc.h> |
| 30 | |
| 31 | #include <asm/fiq.h> |
| 32 | |
Arnd Bergmann | 82906b1 | 2012-08-24 15:14:29 +0200 | [diff] [blame] | 33 | #include <linux/platform_data/asoc-imx-ssi.h> |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 34 | |
| 35 | #include "imx-ssi.h" |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 36 | #include "imx-pcm.h" |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 37 | |
| 38 | struct imx_pcm_runtime_data { |
Fabio Estevam | 2fb1488 | 2013-03-20 02:22:40 -0300 | [diff] [blame] | 39 | unsigned int period; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 40 | int periods; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 41 | unsigned long offset; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 42 | unsigned long last_offset; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 43 | unsigned long size; |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 44 | struct hrtimer hrt; |
| 45 | int poll_time_ns; |
| 46 | struct snd_pcm_substream *substream; |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 47 | atomic_t playing; |
| 48 | atomic_t capturing; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 49 | }; |
| 50 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 51 | static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt) |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 52 | { |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 53 | struct imx_pcm_runtime_data *iprtd = |
| 54 | container_of(hrt, struct imx_pcm_runtime_data, hrt); |
| 55 | struct snd_pcm_substream *substream = iprtd->substream; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 56 | struct snd_pcm_runtime *runtime = substream->runtime; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 57 | struct pt_regs regs; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 58 | unsigned long delta; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 59 | |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 60 | if (!atomic_read(&iprtd->playing) && !atomic_read(&iprtd->capturing)) |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 61 | return HRTIMER_NORESTART; |
| 62 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 63 | get_fiq_regs(®s); |
| 64 | |
| 65 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 66 | iprtd->offset = regs.ARM_r8 & 0xffff; |
| 67 | else |
| 68 | iprtd->offset = regs.ARM_r9 & 0xffff; |
| 69 | |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 70 | /* How much data have we transferred since the last period report? */ |
| 71 | if (iprtd->offset >= iprtd->last_offset) |
| 72 | delta = iprtd->offset - iprtd->last_offset; |
| 73 | else |
| 74 | delta = runtime->buffer_size + iprtd->offset |
| 75 | - iprtd->last_offset; |
| 76 | |
| 77 | /* If we've transferred at least a period then report it and |
| 78 | * reset our poll time */ |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 79 | if (delta >= iprtd->period) { |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 80 | snd_pcm_period_elapsed(substream); |
| 81 | iprtd->last_offset = iprtd->offset; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 82 | } |
| 83 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 84 | hrtimer_forward_now(hrt, ns_to_ktime(iprtd->poll_time_ns)); |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 85 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 86 | return HRTIMER_RESTART; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | static struct fiq_handler fh = { |
| 90 | .name = DRV_NAME, |
| 91 | }; |
| 92 | |
| 93 | static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream, |
| 94 | struct snd_pcm_hw_params *params) |
| 95 | { |
| 96 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 97 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 98 | |
| 99 | iprtd->size = params_buffer_bytes(params); |
| 100 | iprtd->periods = params_periods(params); |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 101 | iprtd->period = params_period_bytes(params) ; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 102 | iprtd->offset = 0; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 103 | iprtd->last_offset = 0; |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 104 | iprtd->poll_time_ns = 1000000000 / params_rate(params) * |
| 105 | params_period_size(params); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 106 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream) |
| 112 | { |
| 113 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 114 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 115 | struct pt_regs regs; |
| 116 | |
| 117 | get_fiq_regs(®s); |
| 118 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 119 | regs.ARM_r8 = (iprtd->period * iprtd->periods - 1) << 16; |
| 120 | else |
| 121 | regs.ARM_r9 = (iprtd->period * iprtd->periods - 1) << 16; |
| 122 | |
| 123 | set_fiq_regs(®s); |
| 124 | |
| 125 | return 0; |
| 126 | } |
| 127 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 128 | static int imx_pcm_fiq; |
| 129 | |
| 130 | static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 131 | { |
| 132 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 133 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 134 | |
| 135 | switch (cmd) { |
| 136 | case SNDRV_PCM_TRIGGER_START: |
| 137 | case SNDRV_PCM_TRIGGER_RESUME: |
| 138 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 139 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 140 | atomic_set(&iprtd->playing, 1); |
| 141 | else |
| 142 | atomic_set(&iprtd->capturing, 1); |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 143 | hrtimer_start(&iprtd->hrt, ns_to_ktime(iprtd->poll_time_ns), |
| 144 | HRTIMER_MODE_REL); |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 145 | enable_fiq(imx_pcm_fiq); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 146 | break; |
| 147 | |
| 148 | case SNDRV_PCM_TRIGGER_STOP: |
| 149 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 150 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 151 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 152 | atomic_set(&iprtd->playing, 0); |
| 153 | else |
| 154 | atomic_set(&iprtd->capturing, 0); |
| 155 | if (!atomic_read(&iprtd->playing) && |
| 156 | !atomic_read(&iprtd->capturing)) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 157 | disable_fiq(imx_pcm_fiq); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 158 | break; |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 159 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 160 | default: |
| 161 | return -EINVAL; |
| 162 | } |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream) |
| 168 | { |
| 169 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 170 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 171 | |
| 172 | return bytes_to_frames(substream->runtime, iprtd->offset); |
| 173 | } |
| 174 | |
| 175 | static struct snd_pcm_hardware snd_imx_hardware = { |
| 176 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 177 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 178 | SNDRV_PCM_INFO_MMAP | |
| 179 | SNDRV_PCM_INFO_MMAP_VALID | |
| 180 | SNDRV_PCM_INFO_PAUSE | |
| 181 | SNDRV_PCM_INFO_RESUME, |
| 182 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 183 | .rate_min = 8000, |
| 184 | .channels_min = 2, |
| 185 | .channels_max = 2, |
| 186 | .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, |
| 187 | .period_bytes_min = 128, |
| 188 | .period_bytes_max = 16 * 1024, |
Sascha Hauer | 565a79f | 2010-04-14 09:17:31 +0200 | [diff] [blame] | 189 | .periods_min = 4, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 190 | .periods_max = 255, |
| 191 | .fifo_size = 0, |
| 192 | }; |
| 193 | |
| 194 | static int snd_imx_open(struct snd_pcm_substream *substream) |
| 195 | { |
| 196 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 197 | struct imx_pcm_runtime_data *iprtd; |
| 198 | int ret; |
| 199 | |
| 200 | iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL); |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 201 | if (iprtd == NULL) |
| 202 | return -ENOMEM; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 203 | runtime->private_data = iprtd; |
| 204 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 205 | iprtd->substream = substream; |
| 206 | |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame^] | 207 | atomic_set(&iprtd->playing, 0); |
| 208 | atomic_set(&iprtd->capturing, 0); |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 209 | hrtimer_init(&iprtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 210 | iprtd->hrt.function = snd_hrtimer_callback; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 211 | |
| 212 | ret = snd_pcm_hw_constraint_integer(substream->runtime, |
| 213 | SNDRV_PCM_HW_PARAM_PERIODS); |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 214 | if (ret < 0) { |
| 215 | kfree(iprtd); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 216 | return ret; |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 217 | } |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 218 | |
| 219 | snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware); |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int snd_imx_close(struct snd_pcm_substream *substream) |
| 224 | { |
| 225 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 226 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 227 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 228 | hrtimer_cancel(&iprtd->hrt); |
| 229 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 230 | kfree(iprtd); |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 235 | static int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, |
| 236 | struct vm_area_struct *vma) |
| 237 | { |
| 238 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 239 | int ret; |
| 240 | |
| 241 | ret = dma_mmap_writecombine(substream->pcm->card->dev, vma, |
| 242 | runtime->dma_area, runtime->dma_addr, runtime->dma_bytes); |
| 243 | |
| 244 | pr_debug("%s: ret: %d %p 0x%08x 0x%08x\n", __func__, ret, |
| 245 | runtime->dma_area, |
| 246 | runtime->dma_addr, |
| 247 | runtime->dma_bytes); |
| 248 | return ret; |
| 249 | } |
| 250 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 251 | static struct snd_pcm_ops imx_pcm_ops = { |
| 252 | .open = snd_imx_open, |
| 253 | .close = snd_imx_close, |
| 254 | .ioctl = snd_pcm_lib_ioctl, |
| 255 | .hw_params = snd_imx_pcm_hw_params, |
| 256 | .prepare = snd_imx_pcm_prepare, |
| 257 | .trigger = snd_imx_pcm_trigger, |
| 258 | .pointer = snd_imx_pcm_pointer, |
| 259 | .mmap = snd_imx_pcm_mmap, |
| 260 | }; |
| 261 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 262 | static int imx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
| 263 | { |
| 264 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 265 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 266 | size_t size = IMX_SSI_DMABUF_SIZE; |
| 267 | |
| 268 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 269 | buf->dev.dev = pcm->card->dev; |
| 270 | buf->private_data = NULL; |
| 271 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, |
| 272 | &buf->addr, GFP_KERNEL); |
| 273 | if (!buf->area) |
| 274 | return -ENOMEM; |
| 275 | buf->bytes = size; |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static u64 imx_pcm_dmamask = DMA_BIT_MASK(32); |
| 281 | |
| 282 | static int imx_pcm_new(struct snd_soc_pcm_runtime *rtd) |
| 283 | { |
| 284 | struct snd_card *card = rtd->card->snd_card; |
| 285 | struct snd_pcm *pcm = rtd->pcm; |
| 286 | int ret = 0; |
| 287 | |
| 288 | if (!card->dev->dma_mask) |
| 289 | card->dev->dma_mask = &imx_pcm_dmamask; |
| 290 | if (!card->dev->coherent_dma_mask) |
| 291 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
| 292 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
| 293 | ret = imx_pcm_preallocate_dma_buffer(pcm, |
| 294 | SNDRV_PCM_STREAM_PLAYBACK); |
| 295 | if (ret) |
| 296 | goto out; |
| 297 | } |
| 298 | |
| 299 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
| 300 | ret = imx_pcm_preallocate_dma_buffer(pcm, |
| 301 | SNDRV_PCM_STREAM_CAPTURE); |
| 302 | if (ret) |
| 303 | goto out; |
| 304 | } |
| 305 | |
| 306 | out: |
| 307 | return ret; |
| 308 | } |
| 309 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 310 | static int ssi_irq = 0; |
| 311 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 312 | static int imx_pcm_fiq_new(struct snd_soc_pcm_runtime *rtd) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 313 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 314 | struct snd_pcm *pcm = rtd->pcm; |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 315 | struct snd_pcm_substream *substream; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 316 | int ret; |
| 317 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 318 | ret = imx_pcm_new(rtd); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 319 | if (ret) |
| 320 | return ret; |
| 321 | |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 322 | substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; |
| 323 | if (substream) { |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 324 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 325 | |
| 326 | imx_ssi_fiq_tx_buffer = (unsigned long)buf->area; |
| 327 | } |
| 328 | |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 329 | substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; |
| 330 | if (substream) { |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 331 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 332 | |
| 333 | imx_ssi_fiq_rx_buffer = (unsigned long)buf->area; |
| 334 | } |
| 335 | |
| 336 | set_fiq_handler(&imx_ssi_fiq_start, |
| 337 | &imx_ssi_fiq_end - &imx_ssi_fiq_start); |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 342 | static void imx_pcm_free(struct snd_pcm *pcm) |
| 343 | { |
| 344 | struct snd_pcm_substream *substream; |
| 345 | struct snd_dma_buffer *buf; |
| 346 | int stream; |
| 347 | |
| 348 | for (stream = 0; stream < 2; stream++) { |
| 349 | substream = pcm->streams[stream].substream; |
| 350 | if (!substream) |
| 351 | continue; |
| 352 | |
| 353 | buf = &substream->dma_buffer; |
| 354 | if (!buf->area) |
| 355 | continue; |
| 356 | |
| 357 | dma_free_writecombine(pcm->card->dev, buf->bytes, |
| 358 | buf->area, buf->addr); |
| 359 | buf->area = NULL; |
| 360 | } |
| 361 | } |
| 362 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 363 | static void imx_pcm_fiq_free(struct snd_pcm *pcm) |
| 364 | { |
| 365 | mxc_set_irq_fiq(ssi_irq, 0); |
| 366 | release_fiq(&fh); |
| 367 | imx_pcm_free(pcm); |
| 368 | } |
| 369 | |
| 370 | static struct snd_soc_platform_driver imx_soc_platform_fiq = { |
| 371 | .ops = &imx_pcm_ops, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 372 | .pcm_new = imx_pcm_fiq_new, |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 373 | .pcm_free = imx_pcm_fiq_free, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 374 | }; |
| 375 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 376 | int imx_pcm_fiq_init(struct platform_device *pdev, |
| 377 | struct imx_pcm_fiq_params *params) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 378 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 379 | int ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 380 | |
| 381 | ret = claim_fiq(&fh); |
| 382 | if (ret) { |
| 383 | dev_err(&pdev->dev, "failed to claim fiq: %d", ret); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 384 | return ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 385 | } |
| 386 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 387 | mxc_set_irq_fiq(params->irq, 1); |
| 388 | ssi_irq = params->irq; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 389 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 390 | imx_pcm_fiq = params->irq; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 391 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 392 | imx_ssi_fiq_base = (unsigned long)params->base; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 393 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 394 | params->dma_params_tx->maxburst = 4; |
| 395 | params->dma_params_rx->maxburst = 6; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 396 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 397 | ret = snd_soc_register_platform(&pdev->dev, &imx_soc_platform_fiq); |
| 398 | if (ret) |
| 399 | goto failed_register; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 400 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 401 | return 0; |
| 402 | |
| 403 | failed_register: |
| 404 | mxc_set_irq_fiq(ssi_irq, 0); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 405 | release_fiq(&fh); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 406 | |
| 407 | return ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 408 | } |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 409 | EXPORT_SYMBOL_GPL(imx_pcm_fiq_init); |
Shawn Guo | 88e89f5 | 2013-04-25 11:18:48 +0800 | [diff] [blame] | 410 | |
| 411 | void imx_pcm_fiq_exit(struct platform_device *pdev) |
| 412 | { |
| 413 | snd_soc_unregister_platform(&pdev->dev); |
| 414 | } |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 415 | EXPORT_SYMBOL_GPL(imx_pcm_fiq_exit); |
Mark Brown | 3c1c32d | 2013-08-16 12:07:19 +0100 | [diff] [blame] | 416 | |
| 417 | MODULE_LICENSE("GPL"); |