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> |
| 25 | #include <sound/initval.h> |
| 26 | #include <sound/pcm.h> |
| 27 | #include <sound/pcm_params.h> |
| 28 | #include <sound/soc.h> |
| 29 | |
| 30 | #include <asm/fiq.h> |
| 31 | |
Arnd Bergmann | 82906b1 | 2012-08-24 15:14:29 +0200 | [diff] [blame] | 32 | #include <linux/platform_data/asoc-imx-ssi.h> |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 33 | |
| 34 | #include "imx-ssi.h" |
| 35 | |
| 36 | struct imx_pcm_runtime_data { |
Fabio Estevam | 2fb1488 | 2013-03-20 02:22:40 -0300 | [diff] [blame] | 37 | unsigned int period; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 38 | int periods; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 39 | unsigned long offset; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 40 | unsigned long last_offset; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 41 | unsigned long size; |
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; |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 45 | atomic_t running; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 46 | }; |
| 47 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 48 | static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt) |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 49 | { |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 50 | struct imx_pcm_runtime_data *iprtd = |
| 51 | container_of(hrt, struct imx_pcm_runtime_data, hrt); |
| 52 | struct snd_pcm_substream *substream = iprtd->substream; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 53 | struct snd_pcm_runtime *runtime = substream->runtime; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 54 | struct pt_regs regs; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 55 | unsigned long delta; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 56 | |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 57 | if (!atomic_read(&iprtd->running)) |
| 58 | return HRTIMER_NORESTART; |
| 59 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 60 | get_fiq_regs(®s); |
| 61 | |
| 62 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 63 | iprtd->offset = regs.ARM_r8 & 0xffff; |
| 64 | else |
| 65 | iprtd->offset = regs.ARM_r9 & 0xffff; |
| 66 | |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 67 | /* How much data have we transferred since the last period report? */ |
| 68 | if (iprtd->offset >= iprtd->last_offset) |
| 69 | delta = iprtd->offset - iprtd->last_offset; |
| 70 | else |
| 71 | delta = runtime->buffer_size + iprtd->offset |
| 72 | - iprtd->last_offset; |
| 73 | |
| 74 | /* If we've transferred at least a period then report it and |
| 75 | * reset our poll time */ |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 76 | if (delta >= iprtd->period) { |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 77 | snd_pcm_period_elapsed(substream); |
| 78 | iprtd->last_offset = iprtd->offset; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 79 | } |
| 80 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 81 | hrtimer_forward_now(hrt, ns_to_ktime(iprtd->poll_time_ns)); |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 82 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 83 | return HRTIMER_RESTART; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | static struct fiq_handler fh = { |
| 87 | .name = DRV_NAME, |
| 88 | }; |
| 89 | |
| 90 | static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream, |
| 91 | struct snd_pcm_hw_params *params) |
| 92 | { |
| 93 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 94 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 95 | |
| 96 | iprtd->size = params_buffer_bytes(params); |
| 97 | iprtd->periods = params_periods(params); |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 98 | iprtd->period = params_period_bytes(params) ; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 99 | iprtd->offset = 0; |
Mark Brown | b4e82b5 | 2010-02-25 12:52:10 +0000 | [diff] [blame] | 100 | iprtd->last_offset = 0; |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 101 | iprtd->poll_time_ns = 1000000000 / params_rate(params) * |
| 102 | params_period_size(params); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 103 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream) |
| 109 | { |
| 110 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 111 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 112 | struct pt_regs regs; |
| 113 | |
| 114 | get_fiq_regs(®s); |
| 115 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 116 | regs.ARM_r8 = (iprtd->period * iprtd->periods - 1) << 16; |
| 117 | else |
| 118 | regs.ARM_r9 = (iprtd->period * iprtd->periods - 1) << 16; |
| 119 | |
| 120 | set_fiq_regs(®s); |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static int fiq_enable; |
| 126 | static int imx_pcm_fiq; |
| 127 | |
| 128 | static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 129 | { |
| 130 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 131 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 132 | |
| 133 | switch (cmd) { |
| 134 | case SNDRV_PCM_TRIGGER_START: |
| 135 | case SNDRV_PCM_TRIGGER_RESUME: |
| 136 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 137 | atomic_set(&iprtd->running, 1); |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 138 | hrtimer_start(&iprtd->hrt, ns_to_ktime(iprtd->poll_time_ns), |
| 139 | HRTIMER_MODE_REL); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 140 | if (++fiq_enable == 1) |
| 141 | enable_fiq(imx_pcm_fiq); |
| 142 | |
| 143 | break; |
| 144 | |
| 145 | case SNDRV_PCM_TRIGGER_STOP: |
| 146 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 147 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 148 | atomic_set(&iprtd->running, 0); |
| 149 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 150 | if (--fiq_enable == 0) |
| 151 | disable_fiq(imx_pcm_fiq); |
| 152 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 153 | break; |
| 154 | default: |
| 155 | return -EINVAL; |
| 156 | } |
| 157 | |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream) |
| 162 | { |
| 163 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 164 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 165 | |
| 166 | return bytes_to_frames(substream->runtime, iprtd->offset); |
| 167 | } |
| 168 | |
| 169 | static struct snd_pcm_hardware snd_imx_hardware = { |
| 170 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 171 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| 172 | SNDRV_PCM_INFO_MMAP | |
| 173 | SNDRV_PCM_INFO_MMAP_VALID | |
| 174 | SNDRV_PCM_INFO_PAUSE | |
| 175 | SNDRV_PCM_INFO_RESUME, |
| 176 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 177 | .rate_min = 8000, |
| 178 | .channels_min = 2, |
| 179 | .channels_max = 2, |
| 180 | .buffer_bytes_max = IMX_SSI_DMABUF_SIZE, |
| 181 | .period_bytes_min = 128, |
| 182 | .period_bytes_max = 16 * 1024, |
Sascha Hauer | 565a79f | 2010-04-14 09:17:31 +0200 | [diff] [blame] | 183 | .periods_min = 4, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 184 | .periods_max = 255, |
| 185 | .fifo_size = 0, |
| 186 | }; |
| 187 | |
| 188 | static int snd_imx_open(struct snd_pcm_substream *substream) |
| 189 | { |
| 190 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 191 | struct imx_pcm_runtime_data *iprtd; |
| 192 | int ret; |
| 193 | |
| 194 | iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL); |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 195 | if (iprtd == NULL) |
| 196 | return -ENOMEM; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 197 | runtime->private_data = iprtd; |
| 198 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 199 | iprtd->substream = substream; |
| 200 | |
Sascha Hauer | 8392609 | 2010-04-14 09:17:30 +0200 | [diff] [blame] | 201 | atomic_set(&iprtd->running, 0); |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 202 | hrtimer_init(&iprtd->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| 203 | iprtd->hrt.function = snd_hrtimer_callback; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 204 | |
| 205 | ret = snd_pcm_hw_constraint_integer(substream->runtime, |
| 206 | SNDRV_PCM_HW_PARAM_PERIODS); |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 207 | if (ret < 0) { |
| 208 | kfree(iprtd); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 209 | return ret; |
Kulikov Vasiliy | 50e8ce1 | 2010-07-16 20:16:54 +0400 | [diff] [blame] | 210 | } |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 211 | |
| 212 | snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware); |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static int snd_imx_close(struct snd_pcm_substream *substream) |
| 217 | { |
| 218 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 219 | struct imx_pcm_runtime_data *iprtd = runtime->private_data; |
| 220 | |
Sascha Hauer | 43a3cec | 2010-04-08 11:31:26 +0200 | [diff] [blame] | 221 | hrtimer_cancel(&iprtd->hrt); |
| 222 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 223 | kfree(iprtd); |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 228 | static int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, |
| 229 | struct vm_area_struct *vma) |
| 230 | { |
| 231 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 232 | int ret; |
| 233 | |
| 234 | ret = dma_mmap_writecombine(substream->pcm->card->dev, vma, |
| 235 | runtime->dma_area, runtime->dma_addr, runtime->dma_bytes); |
| 236 | |
| 237 | pr_debug("%s: ret: %d %p 0x%08x 0x%08x\n", __func__, ret, |
| 238 | runtime->dma_area, |
| 239 | runtime->dma_addr, |
| 240 | runtime->dma_bytes); |
| 241 | return ret; |
| 242 | } |
| 243 | |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 244 | static struct snd_pcm_ops imx_pcm_ops = { |
| 245 | .open = snd_imx_open, |
| 246 | .close = snd_imx_close, |
| 247 | .ioctl = snd_pcm_lib_ioctl, |
| 248 | .hw_params = snd_imx_pcm_hw_params, |
| 249 | .prepare = snd_imx_pcm_prepare, |
| 250 | .trigger = snd_imx_pcm_trigger, |
| 251 | .pointer = snd_imx_pcm_pointer, |
| 252 | .mmap = snd_imx_pcm_mmap, |
| 253 | }; |
| 254 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 255 | static int imx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
| 256 | { |
| 257 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 258 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 259 | size_t size = IMX_SSI_DMABUF_SIZE; |
| 260 | |
| 261 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 262 | buf->dev.dev = pcm->card->dev; |
| 263 | buf->private_data = NULL; |
| 264 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, |
| 265 | &buf->addr, GFP_KERNEL); |
| 266 | if (!buf->area) |
| 267 | return -ENOMEM; |
| 268 | buf->bytes = size; |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static u64 imx_pcm_dmamask = DMA_BIT_MASK(32); |
| 274 | |
| 275 | static int imx_pcm_new(struct snd_soc_pcm_runtime *rtd) |
| 276 | { |
| 277 | struct snd_card *card = rtd->card->snd_card; |
| 278 | struct snd_pcm *pcm = rtd->pcm; |
| 279 | int ret = 0; |
| 280 | |
| 281 | if (!card->dev->dma_mask) |
| 282 | card->dev->dma_mask = &imx_pcm_dmamask; |
| 283 | if (!card->dev->coherent_dma_mask) |
| 284 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
| 285 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { |
| 286 | ret = imx_pcm_preallocate_dma_buffer(pcm, |
| 287 | SNDRV_PCM_STREAM_PLAYBACK); |
| 288 | if (ret) |
| 289 | goto out; |
| 290 | } |
| 291 | |
| 292 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { |
| 293 | ret = imx_pcm_preallocate_dma_buffer(pcm, |
| 294 | SNDRV_PCM_STREAM_CAPTURE); |
| 295 | if (ret) |
| 296 | goto out; |
| 297 | } |
| 298 | |
| 299 | out: |
| 300 | return ret; |
| 301 | } |
| 302 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 303 | static int ssi_irq = 0; |
| 304 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 305 | static int imx_pcm_fiq_new(struct snd_soc_pcm_runtime *rtd) |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 306 | { |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 307 | struct snd_pcm *pcm = rtd->pcm; |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 308 | struct snd_pcm_substream *substream; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 309 | int ret; |
| 310 | |
Liam Girdwood | 552d1ef | 2011-06-07 16:08:33 +0100 | [diff] [blame] | 311 | ret = imx_pcm_new(rtd); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 312 | if (ret) |
| 313 | return ret; |
| 314 | |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 315 | substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; |
| 316 | if (substream) { |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 317 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 318 | |
| 319 | imx_ssi_fiq_tx_buffer = (unsigned long)buf->area; |
| 320 | } |
| 321 | |
Wolfram Sang | 35dcf58 | 2011-08-25 15:54:56 +0200 | [diff] [blame] | 322 | substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].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_rx_buffer = (unsigned long)buf->area; |
| 327 | } |
| 328 | |
| 329 | set_fiq_handler(&imx_ssi_fiq_start, |
| 330 | &imx_ssi_fiq_end - &imx_ssi_fiq_start); |
| 331 | |
| 332 | return 0; |
| 333 | } |
| 334 | |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 335 | static void imx_pcm_free(struct snd_pcm *pcm) |
| 336 | { |
| 337 | struct snd_pcm_substream *substream; |
| 338 | struct snd_dma_buffer *buf; |
| 339 | int stream; |
| 340 | |
| 341 | for (stream = 0; stream < 2; stream++) { |
| 342 | substream = pcm->streams[stream].substream; |
| 343 | if (!substream) |
| 344 | continue; |
| 345 | |
| 346 | buf = &substream->dma_buffer; |
| 347 | if (!buf->area) |
| 348 | continue; |
| 349 | |
| 350 | dma_free_writecombine(pcm->card->dev, buf->bytes, |
| 351 | buf->area, buf->addr); |
| 352 | buf->area = NULL; |
| 353 | } |
| 354 | } |
| 355 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 356 | static void imx_pcm_fiq_free(struct snd_pcm *pcm) |
| 357 | { |
| 358 | mxc_set_irq_fiq(ssi_irq, 0); |
| 359 | release_fiq(&fh); |
| 360 | imx_pcm_free(pcm); |
| 361 | } |
| 362 | |
| 363 | static struct snd_soc_platform_driver imx_soc_platform_fiq = { |
| 364 | .ops = &imx_pcm_ops, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 365 | .pcm_new = imx_pcm_fiq_new, |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 366 | .pcm_free = imx_pcm_fiq_free, |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 367 | }; |
| 368 | |
Shawn Guo | 1927661 | 2013-01-28 14:25:43 +0800 | [diff] [blame] | 369 | int imx_pcm_fiq_init(struct platform_device *pdev) |
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 | struct imx_ssi *ssi = platform_get_drvdata(pdev); |
| 372 | int ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 373 | |
| 374 | ret = claim_fiq(&fh); |
| 375 | if (ret) { |
| 376 | dev_err(&pdev->dev, "failed to claim fiq: %d", ret); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 377 | return ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | mxc_set_irq_fiq(ssi->irq, 1); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 381 | ssi_irq = ssi->irq; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 382 | |
| 383 | imx_pcm_fiq = ssi->irq; |
| 384 | |
| 385 | imx_ssi_fiq_base = (unsigned long)ssi->base; |
| 386 | |
Lars-Peter Clausen | a8909c9 | 2013-04-03 11:06:04 +0200 | [diff] [blame] | 387 | ssi->dma_params_tx.maxburst = 4; |
| 388 | ssi->dma_params_rx.maxburst = 6; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 389 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 390 | ret = snd_soc_register_platform(&pdev->dev, &imx_soc_platform_fiq); |
| 391 | if (ret) |
| 392 | goto failed_register; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 393 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 394 | return 0; |
| 395 | |
| 396 | failed_register: |
| 397 | mxc_set_irq_fiq(ssi_irq, 0); |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 398 | release_fiq(&fh); |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame] | 399 | |
| 400 | return ret; |
Sascha Hauer | 8380222 | 2009-11-25 16:41:04 +0100 | [diff] [blame] | 401 | } |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 402 | EXPORT_SYMBOL_GPL(imx_pcm_fiq_init); |
Shawn Guo | 88e89f5 | 2013-04-25 11:18:48 +0800 | [diff] [blame] | 403 | |
| 404 | void imx_pcm_fiq_exit(struct platform_device *pdev) |
| 405 | { |
| 406 | snd_soc_unregister_platform(&pdev->dev); |
| 407 | } |
Shawn Guo | dbdf6b5 | 2013-04-25 11:18:50 +0800 | [diff] [blame] | 408 | EXPORT_SYMBOL_GPL(imx_pcm_fiq_exit); |