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; |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 42 | struct hrtimer hrt; |
| 43 | int poll_time_ns; |
| 44 | struct snd_pcm_substream *substream; |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 45 | atomic_t playing; |
| 46 | atomic_t capturing; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 47 | }; |
| 48 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 49 | static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt) |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 50 | { |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 51 | struct imx_pcm_runtime_data *iprtd = |
| 52 | container_of(hrt, struct imx_pcm_runtime_data, hrt); |
| 53 | struct snd_pcm_substream *substream = iprtd->substream; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 54 | struct pt_regs regs; |
| 55 | |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 56 | if (!atomic_read(&iprtd->playing) && !atomic_read(&iprtd->capturing)) |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 57 | return HRTIMER_NORESTART; |
| 58 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 59 | get_fiq_regs(®s); |
| 60 | |
| 61 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 62 | iprtd->offset = regs.ARM_r8 & 0xffff; |
| 63 | else |
| 64 | iprtd->offset = regs.ARM_r9 & 0xffff; |
| 65 | |
Oskar Schirmer | 68f9672 | 2013-11-05 12:13:54 +0000 | [diff] [blame] | 66 | snd_pcm_period_elapsed(substream); |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 67 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 68 | hrtimer_forward_now(hrt, ns_to_ktime(iprtd->poll_time_ns)); |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 69 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 70 | return HRTIMER_RESTART; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | static struct fiq_handler fh = { |
| 74 | .name = DRV_NAME, |
| 75 | }; |
| 76 | |
| 77 | static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream, |
| 78 | struct snd_pcm_hw_params *params) |
| 79 | { |
| 80 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 81 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 82 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 83 | iprtd->periods = params_periods(params); |
Oskar Schirmer | 68f9672 | 2013-11-05 12:13:54 +0000 | [diff] [blame] | 84 | iprtd->period = params_period_bytes(params); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 85 | iprtd->offset = 0; |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 86 | iprtd->poll_time_ns = 1000000000 / params_rate(params) * |
| 87 | params_period_size(params); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 88 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream) |
| 94 | { |
| 95 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 96 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 97 | struct pt_regs regs; |
| 98 | |
| 99 | get_fiq_regs(®s); |
| 100 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 101 | regs.ARM_r8 = (iprtd->period * iprtd->periods - 1) << 16; |
| 102 | else |
| 103 | regs.ARM_r9 = (iprtd->period * iprtd->periods - 1) << 16; |
| 104 | |
| 105 | set_fiq_regs(®s); |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 110 | static int imx_pcm_fiq; |
| 111 | |
| 112 | static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 113 | { |
| 114 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 115 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 116 | |
| 117 | switch (cmd) { |
| 118 | case SNDRV_PCM_TRIGGER_START: |
| 119 | case SNDRV_PCM_TRIGGER_RESUME: |
| 120 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 121 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 122 | atomic_set(&iprtd->playing, 1); |
| 123 | else |
| 124 | atomic_set(&iprtd->capturing, 1); |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 125 | hrtimer_start(&iprtd->hrt, ns_to_ktime(iprtd->poll_time_ns), |
| 126 | HRTIMER_MODE_REL); |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 127 | enable_fiq(imx_pcm_fiq); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 128 | break; |
| 129 | |
| 130 | case SNDRV_PCM_TRIGGER_STOP: |
| 131 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 132 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 133 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 134 | atomic_set(&iprtd->playing, 0); |
| 135 | else |
| 136 | atomic_set(&iprtd->capturing, 0); |
| 137 | if (!atomic_read(&iprtd->playing) && |
| 138 | !atomic_read(&iprtd->capturing)) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 139 | disable_fiq(imx_pcm_fiq); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 140 | break; |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 141 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 142 | default: |
| 143 | return -EINVAL; |
| 144 | } |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream) |
| 150 | { |
| 151 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 152 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 153 | |
| 154 | return bytes_to_frames(substream->runtime, iprtd->offset); |
| 155 | } |
| 156 | |
| 157 | static struct snd_pcm_hardware snd_imx_hardware = { |
| 158 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 159 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 160 | SNDRV_PCM_INFO_MMAP | |
| 161 | SNDRV_PCM_INFO_MMAP_VALID | |
| 162 | SNDRV_PCM_INFO_PAUSE | |
| 163 | SNDRV_PCM_INFO_RESUME, |
| 164 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 165 | .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, |
| 166 | .period_bytes_min = 128, |
| 167 | .period_bytes_max = 16 * 1024, |
Sascha Hauer | 565a79f | 2010-04-14 09:17:31 +0200 | [diff] [blame] | 168 | .periods_min = 4, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 169 | .periods_max = 255, |
| 170 | .fifo_size = 0, |
| 171 | }; |
| 172 | |
| 173 | static int snd_imx_open(struct snd_pcm_substream *substream) |
| 174 | { |
| 175 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 176 | struct imx_pcm_runtime_data *iprtd; |
| 177 | int ret; |
| 178 | |
| 179 | iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL); |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 180 | if (iprtd == NULL) |
| 181 | return -ENOMEM; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 182 | runtime->private_data = iprtd; |
| 183 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 184 | iprtd->substream = substream; |
| 185 | |
Oskar Schirmer | fc7dc61 | 2013-11-12 15:46:38 +0000 | [diff] [blame] | 186 | atomic_set(&iprtd->playing, 0); |
| 187 | atomic_set(&iprtd->capturing, 0); |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 188 | hrtimer_init(&iprtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 189 | iprtd->hrt.function = snd_hrtimer_callback; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 190 | |
| 191 | ret = snd_pcm_hw_constraint_integer(substream->runtime, |
| 192 | SNDRV_PCM_HW_PARAM_PERIODS); |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 193 | if (ret < 0) { |
| 194 | kfree(iprtd); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 195 | return ret; |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 196 | } |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 197 | |
| 198 | snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware); |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | static int snd_imx_close(struct snd_pcm_substream *substream) |
| 203 | { |
| 204 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 205 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 206 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 207 | hrtimer_cancel(&iprtd->hrt); |
| 208 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 209 | kfree(iprtd); |
| 210 | |
| 211 | return 0; |
| 212 | } |
| 213 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 214 | static int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, |
| 215 | struct vm_area_struct *vma) |
| 216 | { |
| 217 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 218 | int ret; |
| 219 | |
Luis R. Rodriguez | f6e4566 | 2016-01-22 18:34:22 -0800 | [diff] [blame] | 220 | ret = dma_mmap_wc(substream->pcm->card->dev, vma, runtime->dma_area, |
| 221 | runtime->dma_addr, runtime->dma_bytes); |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 222 | |
Heinrich Schuchardt | e92077c | 2016-04-12 22:51:03 +0200 | [diff] [blame] | 223 | pr_debug("%s: ret: %d %p %pad 0x%08zx\n", __func__, ret, |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 224 | runtime->dma_area, |
Arnd Bergmann | 34e684f | 2015-12-08 16:35:51 +0100 | [diff] [blame] | 225 | &runtime->dma_addr, |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 226 | runtime->dma_bytes); |
| 227 | return ret; |
| 228 | } |
| 229 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 230 | static struct snd_pcm_ops imx_pcm_ops = { |
| 231 | .open = snd_imx_open, |
| 232 | .close = snd_imx_close, |
| 233 | .ioctl = snd_pcm_lib_ioctl, |
| 234 | .hw_params = snd_imx_pcm_hw_params, |
| 235 | .prepare = snd_imx_pcm_prepare, |
| 236 | .trigger = snd_imx_pcm_trigger, |
| 237 | .pointer = snd_imx_pcm_pointer, |
| 238 | .mmap = snd_imx_pcm_mmap, |
| 239 | }; |
| 240 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 241 | static int imx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
| 242 | { |
| 243 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 244 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 245 | size_t size = IMX_SSI_DMABUF_SIZE; |
| 246 | |
| 247 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 248 | buf->dev.dev = pcm->card->dev; |
| 249 | buf->private_data = NULL; |
Luis R. Rodriguez | f6e4566 | 2016-01-22 18:34:22 -0800 | [diff] [blame] | 250 | buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL); |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 251 | if (!buf->area) |
| 252 | return -ENOMEM; |
| 253 | buf->bytes = size; |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 258 | static int imx_pcm_new(struct snd_soc_pcm_runtime *rtd) |
| 259 | { |
| 260 | struct snd_card *card = rtd->card->snd_card; |
| 261 | struct snd_pcm *pcm = rtd->pcm; |
Russell King | c9bd5e6 | 2013-06-27 12:53:37 +0100 | [diff] [blame] | 262 | int ret; |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 263 | |
Russell King | c9bd5e6 | 2013-06-27 12:53:37 +0100 | [diff] [blame] | 264 | ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); |
| 265 | if (ret) |
| 266 | return ret; |
| 267 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 268 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
| 269 | ret = imx_pcm_preallocate_dma_buffer(pcm, |
| 270 | SNDRV_PCM_STREAM_PLAYBACK); |
| 271 | if (ret) |
Fabio Estevam | ea9f853 | 2014-02-24 00:20:43 -0300 | [diff] [blame] | 272 | return ret; |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
| 276 | ret = imx_pcm_preallocate_dma_buffer(pcm, |
| 277 | SNDRV_PCM_STREAM_CAPTURE); |
| 278 | if (ret) |
Fabio Estevam | ea9f853 | 2014-02-24 00:20:43 -0300 | [diff] [blame] | 279 | return ret; |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 280 | } |
| 281 | |
Fabio Estevam | ea9f853 | 2014-02-24 00:20:43 -0300 | [diff] [blame] | 282 | return 0; |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 283 | } |
| 284 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 285 | static int ssi_irq = 0; |
| 286 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 287 | static int imx_pcm_fiq_new(struct snd_soc_pcm_runtime *rtd) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 288 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 289 | struct snd_pcm *pcm = rtd->pcm; |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 290 | struct snd_pcm_substream *substream; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 291 | int ret; |
| 292 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 293 | ret = imx_pcm_new(rtd); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 294 | if (ret) |
| 295 | return ret; |
| 296 | |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 297 | substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; |
| 298 | if (substream) { |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 299 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 300 | |
| 301 | imx_ssi_fiq_tx_buffer = (unsigned long)buf->area; |
| 302 | } |
| 303 | |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 304 | substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; |
| 305 | if (substream) { |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 306 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 307 | |
| 308 | imx_ssi_fiq_rx_buffer = (unsigned long)buf->area; |
| 309 | } |
| 310 | |
| 311 | set_fiq_handler(&imx_ssi_fiq_start, |
| 312 | &imx_ssi_fiq_end - &imx_ssi_fiq_start); |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 317 | static void imx_pcm_free(struct snd_pcm *pcm) |
| 318 | { |
| 319 | struct snd_pcm_substream *substream; |
| 320 | struct snd_dma_buffer *buf; |
| 321 | int stream; |
| 322 | |
| 323 | for (stream = 0; stream < 2; stream++) { |
| 324 | substream = pcm->streams[stream].substream; |
| 325 | if (!substream) |
| 326 | continue; |
| 327 | |
| 328 | buf = &substream->dma_buffer; |
| 329 | if (!buf->area) |
| 330 | continue; |
| 331 | |
Luis R. Rodriguez | f6e4566 | 2016-01-22 18:34:22 -0800 | [diff] [blame] | 332 | dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr); |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 333 | buf->area = NULL; |
| 334 | } |
| 335 | } |
| 336 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 337 | static void imx_pcm_fiq_free(struct snd_pcm *pcm) |
| 338 | { |
| 339 | mxc_set_irq_fiq(ssi_irq, 0); |
| 340 | release_fiq(&fh); |
| 341 | imx_pcm_free(pcm); |
| 342 | } |
| 343 | |
| 344 | static struct snd_soc_platform_driver imx_soc_platform_fiq = { |
| 345 | .ops = &imx_pcm_ops, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 346 | .pcm_new = imx_pcm_fiq_new, |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 347 | .pcm_free = imx_pcm_fiq_free, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 348 | }; |
| 349 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 350 | int imx_pcm_fiq_init(struct platform_device *pdev, |
| 351 | struct imx_pcm_fiq_params *params) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 352 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 353 | int ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 354 | |
| 355 | ret = claim_fiq(&fh); |
| 356 | if (ret) { |
| 357 | dev_err(&pdev->dev, "failed to claim fiq: %d", ret); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 358 | return ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 359 | } |
| 360 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 361 | mxc_set_irq_fiq(params->irq, 1); |
| 362 | ssi_irq = params->irq; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 363 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 364 | imx_pcm_fiq = params->irq; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 365 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 366 | imx_ssi_fiq_base = (unsigned long)params->base; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 367 | |
Markus Pargmann | 9051cba | 2013-06-20 15:20:21 +0200 | [diff] [blame] | 368 | params->dma_params_tx->maxburst = 4; |
| 369 | params->dma_params_rx->maxburst = 6; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 370 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 371 | ret = snd_soc_register_platform(&pdev->dev, &imx_soc_platform_fiq); |
| 372 | if (ret) |
| 373 | goto failed_register; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 374 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 375 | return 0; |
| 376 | |
| 377 | failed_register: |
| 378 | mxc_set_irq_fiq(ssi_irq, 0); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 379 | release_fiq(&fh); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 380 | |
| 381 | return ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 382 | } |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 383 | EXPORT_SYMBOL_GPL(imx_pcm_fiq_init); |
Shawn Guo | 88e89f5 | 2013-04-25 11:18:48 +0800 | [diff] [blame] | 384 | |
| 385 | void imx_pcm_fiq_exit(struct platform_device *pdev) |
| 386 | { |
| 387 | snd_soc_unregister_platform(&pdev->dev); |
| 388 | } |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 389 | EXPORT_SYMBOL_GPL(imx_pcm_fiq_exit); |
Mark Brown | 3c1c32d | 2013-08-16 12:07:19 +0100 | [diff] [blame] | 390 | |
| 391 | MODULE_LICENSE("GPL"); |