Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 1 | /* |
| 2 | * File: sound/soc/blackfin/bf5xx-ac97-pcm.c |
| 3 | * Author: Cliff Cai <Cliff.Cai@analog.com> |
| 4 | * |
| 5 | * Created: Tue June 06 2008 |
| 6 | * Description: DMA Driver for AC97 sound chip |
| 7 | * |
| 8 | * Modified: |
| 9 | * Copyright 2008 Analog Devices Inc. |
| 10 | * |
| 11 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or |
| 16 | * (at your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, |
| 19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | * GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, see the file COPYING, or write |
| 25 | * to the Free Software Foundation, Inc., |
| 26 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 27 | */ |
| 28 | |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/platform_device.h> |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 32 | #include <linux/dma-mapping.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame^] | 33 | #include <linux/gfp.h> |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 34 | |
| 35 | #include <sound/core.h> |
| 36 | #include <sound/pcm.h> |
| 37 | #include <sound/pcm_params.h> |
| 38 | #include <sound/soc.h> |
| 39 | |
| 40 | #include <asm/dma.h> |
| 41 | |
| 42 | #include "bf5xx-ac97-pcm.h" |
| 43 | #include "bf5xx-ac97.h" |
| 44 | #include "bf5xx-sport.h" |
| 45 | |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 46 | static unsigned int ac97_chan_mask[] = { |
| 47 | SP_FL, /* Mono */ |
| 48 | SP_STEREO, /* Stereo */ |
| 49 | SP_2DOT1, /* 2.1*/ |
| 50 | SP_QUAD,/*Quadraquic*/ |
| 51 | SP_FL | SP_FR | SP_FC | SP_SL | SP_SR,/*5 channels */ |
| 52 | SP_5DOT1, /* 5.1 */ |
| 53 | }; |
| 54 | |
| 55 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 56 | static void bf5xx_mmap_copy(struct snd_pcm_substream *substream, |
| 57 | snd_pcm_uframes_t count) |
| 58 | { |
| 59 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 60 | struct sport_device *sport = runtime->private_data; |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 61 | unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1]; |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 62 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 63 | bf5xx_pcm_to_ac97((struct ac97_frame *)sport->tx_dma_buf + |
| 64 | sport->tx_pos, (__u16 *)runtime->dma_area + sport->tx_pos * |
| 65 | runtime->channels, count, chan_mask); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 66 | sport->tx_pos += runtime->period_size; |
| 67 | if (sport->tx_pos >= runtime->buffer_size) |
| 68 | sport->tx_pos %= runtime->buffer_size; |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 69 | sport->tx_delay_pos = sport->tx_pos; |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 70 | } else { |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 71 | bf5xx_ac97_to_pcm((struct ac97_frame *)sport->rx_dma_buf + |
| 72 | sport->rx_pos, (__u16 *)runtime->dma_area + sport->rx_pos * |
| 73 | runtime->channels, count); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 74 | sport->rx_pos += runtime->period_size; |
| 75 | if (sport->rx_pos >= runtime->buffer_size) |
| 76 | sport->rx_pos %= runtime->buffer_size; |
| 77 | } |
| 78 | } |
| 79 | #endif |
| 80 | |
| 81 | static void bf5xx_dma_irq(void *data) |
| 82 | { |
| 83 | struct snd_pcm_substream *pcm = data; |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 84 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 85 | struct snd_pcm_runtime *runtime = pcm->runtime; |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 86 | struct sport_device *sport = runtime->private_data; |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 87 | bf5xx_mmap_copy(pcm, runtime->period_size); |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 88 | if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 89 | if (sport->once == 0) { |
| 90 | snd_pcm_period_elapsed(pcm); |
| 91 | bf5xx_mmap_copy(pcm, runtime->period_size); |
| 92 | sport->once = 1; |
| 93 | } |
| 94 | } |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 95 | #endif |
| 96 | snd_pcm_period_elapsed(pcm); |
| 97 | } |
| 98 | |
| 99 | /* The memory size for pure pcm data is 128*1024 = 0x20000 bytes. |
| 100 | * The total rx/tx buffer is for ac97 frame to hold all pcm data |
| 101 | * is 0x20000 * sizeof(struct ac97_frame) / 4. |
| 102 | */ |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 103 | static const struct snd_pcm_hardware bf5xx_pcm_hardware = { |
| 104 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
Bryan Wu | 27b9be5 | 2008-11-18 16:18:21 +0800 | [diff] [blame] | 105 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 106 | SNDRV_PCM_INFO_MMAP | |
| 107 | SNDRV_PCM_INFO_MMAP_VALID | |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 108 | #endif |
Bryan Wu | 27b9be5 | 2008-11-18 16:18:21 +0800 | [diff] [blame] | 109 | SNDRV_PCM_INFO_BLOCK_TRANSFER, |
| 110 | |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 111 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 112 | .period_bytes_min = 32, |
| 113 | .period_bytes_max = 0x10000, |
| 114 | .periods_min = 1, |
| 115 | .periods_max = PAGE_SIZE/32, |
| 116 | .buffer_bytes_max = 0x20000, /* 128 kbytes */ |
| 117 | .fifo_size = 16, |
| 118 | }; |
| 119 | |
| 120 | static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream, |
| 121 | struct snd_pcm_hw_params *params) |
| 122 | { |
| 123 | size_t size = bf5xx_pcm_hardware.buffer_bytes_max |
| 124 | * sizeof(struct ac97_frame) / 4; |
| 125 | |
| 126 | snd_pcm_lib_malloc_pages(substream, size); |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream) |
| 132 | { |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 133 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 134 | struct snd_pcm_runtime *runtime = substream->runtime; |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 135 | struct sport_device *sport = runtime->private_data; |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 136 | |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 137 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 138 | sport->once = 0; |
| 139 | if (runtime->dma_area) |
| 140 | memset(runtime->dma_area, 0, runtime->buffer_size); |
| 141 | memset(sport->tx_dma_buf, 0, runtime->buffer_size * |
| 142 | sizeof(struct ac97_frame)); |
| 143 | } else |
| 144 | memset(sport->rx_dma_buf, 0, runtime->buffer_size * |
| 145 | sizeof(struct ac97_frame)); |
| 146 | #endif |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 147 | snd_pcm_lib_free_pages(substream); |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream) |
| 152 | { |
| 153 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 154 | struct sport_device *sport = runtime->private_data; |
| 155 | |
| 156 | /* An intermediate buffer is introduced for implementing mmap for |
| 157 | * SPORT working in TMD mode(include AC97). |
| 158 | */ |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 159 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 160 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 161 | sport_set_tx_callback(sport, bf5xx_dma_irq, substream); |
| 162 | sport_config_tx_dma(sport, sport->tx_dma_buf, runtime->periods, |
| 163 | runtime->period_size * sizeof(struct ac97_frame)); |
| 164 | } else { |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 165 | sport_set_rx_callback(sport, bf5xx_dma_irq, substream); |
| 166 | sport_config_rx_dma(sport, sport->rx_dma_buf, runtime->periods, |
| 167 | runtime->period_size * sizeof(struct ac97_frame)); |
| 168 | } |
| 169 | #else |
| 170 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 171 | sport_set_tx_callback(sport, bf5xx_dma_irq, substream); |
| 172 | sport_config_tx_dma(sport, runtime->dma_area, runtime->periods, |
| 173 | runtime->period_size * sizeof(struct ac97_frame)); |
| 174 | } else { |
| 175 | sport_set_rx_callback(sport, bf5xx_dma_irq, substream); |
| 176 | sport_config_rx_dma(sport, runtime->dma_area, runtime->periods, |
| 177 | runtime->period_size * sizeof(struct ac97_frame)); |
| 178 | } |
| 179 | #endif |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| 184 | { |
| 185 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 186 | struct sport_device *sport = runtime->private_data; |
| 187 | int ret = 0; |
| 188 | |
| 189 | pr_debug("%s enter\n", __func__); |
| 190 | switch (cmd) { |
| 191 | case SNDRV_PCM_TRIGGER_START: |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 192 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
Cliff Cai | a89e611 | 2008-11-18 16:18:18 +0800 | [diff] [blame] | 193 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 194 | bf5xx_mmap_copy(substream, runtime->period_size); |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 195 | sport->tx_delay_pos = 0; |
Cliff Cai | a89e611 | 2008-11-18 16:18:18 +0800 | [diff] [blame] | 196 | #endif |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 197 | sport_tx_start(sport); |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 198 | } else |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 199 | sport_rx_start(sport); |
| 200 | break; |
| 201 | case SNDRV_PCM_TRIGGER_STOP: |
| 202 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 203 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 204 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 205 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 206 | sport->tx_pos = 0; |
| 207 | #endif |
| 208 | sport_tx_stop(sport); |
| 209 | } else { |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 210 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 211 | sport->rx_pos = 0; |
| 212 | #endif |
| 213 | sport_rx_stop(sport); |
| 214 | } |
| 215 | break; |
| 216 | default: |
| 217 | ret = -EINVAL; |
| 218 | } |
| 219 | return ret; |
| 220 | } |
| 221 | |
| 222 | static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream) |
| 223 | { |
| 224 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 225 | struct sport_device *sport = runtime->private_data; |
| 226 | unsigned int curr; |
| 227 | |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 228 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 229 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
Cliff Cai | 6b58a82 | 2008-09-27 22:32:20 +0800 | [diff] [blame] | 230 | curr = sport->tx_delay_pos; |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 231 | else |
| 232 | curr = sport->rx_pos; |
| 233 | #else |
| 234 | |
| 235 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 236 | curr = sport_curr_offset_tx(sport) / sizeof(struct ac97_frame); |
| 237 | else |
| 238 | curr = sport_curr_offset_rx(sport) / sizeof(struct ac97_frame); |
| 239 | |
| 240 | #endif |
| 241 | return curr; |
| 242 | } |
| 243 | |
| 244 | static int bf5xx_pcm_open(struct snd_pcm_substream *substream) |
| 245 | { |
| 246 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 247 | int ret; |
| 248 | |
| 249 | pr_debug("%s enter\n", __func__); |
| 250 | snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware); |
| 251 | |
| 252 | ret = snd_pcm_hw_constraint_integer(runtime, |
| 253 | SNDRV_PCM_HW_PARAM_PERIODS); |
| 254 | if (ret < 0) |
| 255 | goto out; |
| 256 | |
| 257 | if (sport_handle != NULL) |
| 258 | runtime->private_data = sport_handle; |
| 259 | else { |
| 260 | pr_err("sport_handle is NULL\n"); |
| 261 | return -1; |
| 262 | } |
| 263 | return 0; |
| 264 | |
| 265 | out: |
| 266 | return ret; |
| 267 | } |
| 268 | |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 269 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 270 | static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream, |
| 271 | struct vm_area_struct *vma) |
| 272 | { |
| 273 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 274 | size_t size = vma->vm_end - vma->vm_start; |
| 275 | vma->vm_start = (unsigned long)runtime->dma_area; |
| 276 | vma->vm_end = vma->vm_start + size; |
| 277 | vma->vm_flags |= VM_SHARED; |
| 278 | return 0 ; |
| 279 | } |
| 280 | #else |
| 281 | static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel, |
| 282 | snd_pcm_uframes_t pos, |
| 283 | void __user *buf, snd_pcm_uframes_t count) |
| 284 | { |
| 285 | struct snd_pcm_runtime *runtime = substream->runtime; |
Cliff Cai | a89e611 | 2008-11-18 16:18:18 +0800 | [diff] [blame] | 286 | unsigned int chan_mask = ac97_chan_mask[runtime->channels - 1]; |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 287 | pr_debug("%s copy pos:0x%lx count:0x%lx\n", |
| 288 | substream->stream ? "Capture" : "Playback", pos, count); |
| 289 | |
| 290 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 291 | bf5xx_pcm_to_ac97((struct ac97_frame *)runtime->dma_area + pos, |
| 292 | (__u16 *)buf, count, chan_mask); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 293 | else |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 294 | bf5xx_ac97_to_pcm((struct ac97_frame *)runtime->dma_area + pos, |
| 295 | (__u16 *)buf, count); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 296 | return 0; |
| 297 | } |
| 298 | #endif |
| 299 | |
Mark Brown | b2a19d0 | 2009-01-17 19:14:26 +0000 | [diff] [blame] | 300 | static struct snd_pcm_ops bf5xx_pcm_ac97_ops = { |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 301 | .open = bf5xx_pcm_open, |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 302 | .ioctl = snd_pcm_lib_ioctl, |
| 303 | .hw_params = bf5xx_pcm_hw_params, |
| 304 | .hw_free = bf5xx_pcm_hw_free, |
| 305 | .prepare = bf5xx_pcm_prepare, |
| 306 | .trigger = bf5xx_pcm_trigger, |
| 307 | .pointer = bf5xx_pcm_pointer, |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 308 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 309 | .mmap = bf5xx_pcm_mmap, |
| 310 | #else |
| 311 | .copy = bf5xx_pcm_copy, |
| 312 | #endif |
| 313 | }; |
| 314 | |
| 315 | static int bf5xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
| 316 | { |
| 317 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; |
| 318 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 319 | size_t size = bf5xx_pcm_hardware.buffer_bytes_max |
| 320 | * sizeof(struct ac97_frame) / 4; |
| 321 | |
| 322 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 323 | buf->dev.dev = pcm->card->dev; |
| 324 | buf->private_data = NULL; |
| 325 | buf->area = dma_alloc_coherent(pcm->card->dev, size, |
| 326 | &buf->addr, GFP_KERNEL); |
| 327 | if (!buf->area) { |
| 328 | pr_err("Failed to allocate dma memory\n"); |
| 329 | pr_err("Please increase uncached DMA memory region\n"); |
| 330 | return -ENOMEM; |
| 331 | } |
| 332 | buf->bytes = size; |
| 333 | |
| 334 | pr_debug("%s, area:%p, size:0x%08lx\n", __func__, |
| 335 | buf->area, buf->bytes); |
| 336 | |
| 337 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 338 | sport_handle->tx_buf = buf->area; |
| 339 | else |
| 340 | sport_handle->rx_buf = buf->area; |
| 341 | |
| 342 | /* |
| 343 | * Need to allocate local buffer when enable |
| 344 | * MMAP for SPORT working in TMD mode (include AC97). |
| 345 | */ |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 346 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 347 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 348 | if (!sport_handle->tx_dma_buf) { |
| 349 | sport_handle->tx_dma_buf = dma_alloc_coherent(NULL, \ |
| 350 | size, &sport_handle->tx_dma_phy, GFP_KERNEL); |
| 351 | if (!sport_handle->tx_dma_buf) { |
Joe Perches | 2f1ff66 | 2010-01-31 12:02:12 -0800 | [diff] [blame] | 352 | pr_err("Failed to allocate memory for tx dma buf - Please increase uncached DMA memory region\n"); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 353 | return -ENOMEM; |
| 354 | } else |
| 355 | memset(sport_handle->tx_dma_buf, 0, size); |
| 356 | } else |
| 357 | memset(sport_handle->tx_dma_buf, 0, size); |
| 358 | } else { |
| 359 | if (!sport_handle->rx_dma_buf) { |
| 360 | sport_handle->rx_dma_buf = dma_alloc_coherent(NULL, \ |
| 361 | size, &sport_handle->rx_dma_phy, GFP_KERNEL); |
| 362 | if (!sport_handle->rx_dma_buf) { |
Joe Perches | 2f1ff66 | 2010-01-31 12:02:12 -0800 | [diff] [blame] | 363 | pr_err("Failed to allocate memory for rx dma buf - Please increase uncached DMA memory region\n"); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 364 | return -ENOMEM; |
| 365 | } else |
| 366 | memset(sport_handle->rx_dma_buf, 0, size); |
| 367 | } else |
| 368 | memset(sport_handle->rx_dma_buf, 0, size); |
| 369 | } |
| 370 | #endif |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm) |
| 375 | { |
| 376 | struct snd_pcm_substream *substream; |
| 377 | struct snd_dma_buffer *buf; |
| 378 | int stream; |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 379 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 380 | size_t size = bf5xx_pcm_hardware.buffer_bytes_max * |
| 381 | sizeof(struct ac97_frame) / 4; |
| 382 | #endif |
| 383 | for (stream = 0; stream < 2; stream++) { |
| 384 | substream = pcm->streams[stream].substream; |
| 385 | if (!substream) |
| 386 | continue; |
| 387 | |
| 388 | buf = &substream->dma_buffer; |
| 389 | if (!buf->area) |
| 390 | continue; |
| 391 | dma_free_coherent(NULL, buf->bytes, buf->area, 0); |
| 392 | buf->area = NULL; |
Cliff Cai | 67f854b | 2008-11-18 16:18:17 +0800 | [diff] [blame] | 393 | #if defined(CONFIG_SND_BF5XX_MMAP_SUPPORT) |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 394 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 395 | if (sport_handle->tx_dma_buf) |
| 396 | dma_free_coherent(NULL, size, \ |
| 397 | sport_handle->tx_dma_buf, 0); |
| 398 | sport_handle->tx_dma_buf = NULL; |
| 399 | } else { |
| 400 | |
| 401 | if (sport_handle->rx_dma_buf) |
| 402 | dma_free_coherent(NULL, size, \ |
| 403 | sport_handle->rx_dma_buf, 0); |
| 404 | sport_handle->rx_dma_buf = NULL; |
| 405 | } |
| 406 | #endif |
| 407 | } |
| 408 | if (sport_handle) |
| 409 | sport_done(sport_handle); |
| 410 | } |
| 411 | |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 412 | static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 413 | |
| 414 | int bf5xx_pcm_ac97_new(struct snd_card *card, struct snd_soc_dai *dai, |
| 415 | struct snd_pcm *pcm) |
| 416 | { |
| 417 | int ret = 0; |
| 418 | |
| 419 | pr_debug("%s enter\n", __func__); |
| 420 | if (!card->dev->dma_mask) |
| 421 | card->dev->dma_mask = &bf5xx_pcm_dmamask; |
| 422 | if (!card->dev->coherent_dma_mask) |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 423 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 424 | |
| 425 | if (dai->playback.channels_min) { |
| 426 | ret = bf5xx_pcm_preallocate_dma_buffer(pcm, |
| 427 | SNDRV_PCM_STREAM_PLAYBACK); |
| 428 | if (ret) |
| 429 | goto out; |
| 430 | } |
| 431 | |
| 432 | if (dai->capture.channels_min) { |
| 433 | ret = bf5xx_pcm_preallocate_dma_buffer(pcm, |
| 434 | SNDRV_PCM_STREAM_CAPTURE); |
| 435 | if (ret) |
| 436 | goto out; |
| 437 | } |
| 438 | out: |
| 439 | return ret; |
| 440 | } |
| 441 | |
| 442 | struct snd_soc_platform bf5xx_ac97_soc_platform = { |
| 443 | .name = "bf5xx-audio", |
| 444 | .pcm_ops = &bf5xx_pcm_ac97_ops, |
| 445 | .pcm_new = bf5xx_pcm_ac97_new, |
| 446 | .pcm_free = bf5xx_pcm_free_dma_buffers, |
| 447 | }; |
| 448 | EXPORT_SYMBOL_GPL(bf5xx_ac97_soc_platform); |
| 449 | |
Takashi Iwai | c9b3a40 | 2008-12-10 07:47:22 +0100 | [diff] [blame] | 450 | static int __init bfin_ac97_init(void) |
Mark Brown | 958e792 | 2008-12-03 19:58:17 +0000 | [diff] [blame] | 451 | { |
| 452 | return snd_soc_register_platform(&bf5xx_ac97_soc_platform); |
| 453 | } |
| 454 | module_init(bfin_ac97_init); |
| 455 | |
| 456 | static void __exit bfin_ac97_exit(void) |
| 457 | { |
| 458 | snd_soc_unregister_platform(&bf5xx_ac97_soc_platform); |
| 459 | } |
| 460 | module_exit(bfin_ac97_exit); |
| 461 | |
Cliff Cai | aff0510 | 2008-09-05 18:21:36 +0800 | [diff] [blame] | 462 | MODULE_AUTHOR("Cliff Cai"); |
| 463 | MODULE_DESCRIPTION("ADI Blackfin AC97 PCM DMA module"); |
| 464 | MODULE_LICENSE("GPL"); |