Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/sound/soc/pxa/mmp-pcm.c |
| 3 | * |
| 4 | * Copyright (C) 2011 Marvell International Ltd. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/platform_device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/dmaengine.h> |
Chris Ball | ca05741 | 2012-10-06 07:38:16 -0400 | [diff] [blame] | 18 | #include <linux/platform_data/dma-mmp_tdma.h> |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 19 | #include <linux/platform_data/mmp_audio.h> |
Daniel Mack | d65a145 | 2013-08-12 10:42:39 +0200 | [diff] [blame] | 20 | |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 21 | #include <sound/pxa2xx-lib.h> |
| 22 | #include <sound/core.h> |
| 23 | #include <sound/pcm.h> |
| 24 | #include <sound/pcm_params.h> |
| 25 | #include <sound/soc.h> |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 26 | #include <sound/dmaengine_pcm.h> |
| 27 | |
| 28 | struct mmp_dma_data { |
| 29 | int ssp_id; |
| 30 | struct resource *dma_res; |
| 31 | }; |
| 32 | |
| 33 | #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \ |
| 34 | SNDRV_PCM_INFO_MMAP_VALID | \ |
| 35 | SNDRV_PCM_INFO_INTERLEAVED | \ |
| 36 | SNDRV_PCM_INFO_PAUSE | \ |
| 37 | SNDRV_PCM_INFO_RESUME) |
| 38 | |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 39 | static struct snd_pcm_hardware mmp_pcm_hardware[] = { |
| 40 | { |
| 41 | .info = MMP_PCM_INFO, |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 42 | .period_bytes_min = 1024, |
| 43 | .period_bytes_max = 2048, |
| 44 | .periods_min = 2, |
| 45 | .periods_max = 32, |
| 46 | .buffer_bytes_max = 4096, |
| 47 | .fifo_size = 32, |
| 48 | }, |
| 49 | { |
| 50 | .info = MMP_PCM_INFO, |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 51 | .period_bytes_min = 1024, |
| 52 | .period_bytes_max = 2048, |
| 53 | .periods_min = 2, |
| 54 | .periods_max = 32, |
| 55 | .buffer_bytes_max = 4096, |
| 56 | .fifo_size = 32, |
| 57 | }, |
| 58 | }; |
| 59 | |
| 60 | static int mmp_pcm_hw_params(struct snd_pcm_substream *substream, |
| 61 | struct snd_pcm_hw_params *params) |
| 62 | { |
| 63 | struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream); |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 64 | struct dma_slave_config slave_config; |
| 65 | int ret; |
| 66 | |
Qiao Zhou | 48b752a | 2013-12-17 16:22:24 +0800 | [diff] [blame] | 67 | ret = |
| 68 | snd_dmaengine_pcm_prepare_slave_config(substream, params, |
| 69 | &slave_config); |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 70 | if (ret) |
| 71 | return ret; |
| 72 | |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 73 | ret = dmaengine_slave_config(chan, &slave_config); |
| 74 | if (ret) |
| 75 | return ret; |
| 76 | |
| 77 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
| 78 | |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static bool filter(struct dma_chan *chan, void *param) |
| 83 | { |
| 84 | struct mmp_dma_data *dma_data = param; |
| 85 | bool found = false; |
| 86 | char *devname; |
| 87 | |
| 88 | devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name, |
| 89 | dma_data->ssp_id); |
| 90 | if ((strcmp(dev_name(chan->device->dev), devname) == 0) && |
| 91 | (chan->chan_id == dma_data->dma_res->start)) { |
| 92 | found = true; |
| 93 | } |
| 94 | |
| 95 | kfree(devname); |
| 96 | return found; |
| 97 | } |
| 98 | |
| 99 | static int mmp_pcm_open(struct snd_pcm_substream *substream) |
| 100 | { |
| 101 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 102 | struct platform_device *pdev = to_platform_device(rtd->platform->dev); |
| 103 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
Lars-Peter Clausen | ac581e6 | 2013-03-22 14:12:11 +0100 | [diff] [blame] | 104 | struct mmp_dma_data dma_data; |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 105 | struct resource *r; |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 106 | |
| 107 | r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream); |
| 108 | if (!r) |
| 109 | return -EBUSY; |
| 110 | |
| 111 | snd_soc_set_runtime_hwparams(substream, |
| 112 | &mmp_pcm_hardware[substream->stream]); |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 113 | |
Lars-Peter Clausen | ac581e6 | 2013-03-22 14:12:11 +0100 | [diff] [blame] | 114 | dma_data.dma_res = r; |
| 115 | dma_data.ssp_id = cpu_dai->id; |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 116 | |
Lars-Peter Clausen | 7c1c1d4 | 2013-04-15 19:19:48 +0200 | [diff] [blame] | 117 | return snd_dmaengine_pcm_open_request_chan(substream, filter, |
| 118 | &dma_data); |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static int mmp_pcm_mmap(struct snd_pcm_substream *substream, |
| 122 | struct vm_area_struct *vma) |
| 123 | { |
| 124 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 125 | unsigned long off = vma->vm_pgoff; |
| 126 | |
| 127 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
| 128 | return remap_pfn_range(vma, vma->vm_start, |
| 129 | __phys_to_pfn(runtime->dma_addr) + off, |
| 130 | vma->vm_end - vma->vm_start, vma->vm_page_prot); |
| 131 | } |
| 132 | |
Lars-Peter Clausen | 60e10d2 | 2013-05-14 22:19:51 +0200 | [diff] [blame] | 133 | static struct snd_pcm_ops mmp_pcm_ops = { |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 134 | .open = mmp_pcm_open, |
Lars-Peter Clausen | 7c1c1d4 | 2013-04-15 19:19:48 +0200 | [diff] [blame] | 135 | .close = snd_dmaengine_pcm_close_release_chan, |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 136 | .ioctl = snd_pcm_lib_ioctl, |
| 137 | .hw_params = mmp_pcm_hw_params, |
| 138 | .trigger = snd_dmaengine_pcm_trigger, |
| 139 | .pointer = snd_dmaengine_pcm_pointer, |
| 140 | .mmap = mmp_pcm_mmap, |
| 141 | }; |
| 142 | |
| 143 | static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm) |
| 144 | { |
| 145 | struct snd_pcm_substream *substream; |
| 146 | struct snd_dma_buffer *buf; |
| 147 | int stream; |
| 148 | struct gen_pool *gpool; |
| 149 | |
| 150 | gpool = sram_get_gpool("asram"); |
| 151 | if (!gpool) |
| 152 | return; |
| 153 | |
| 154 | for (stream = 0; stream < 2; stream++) { |
| 155 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; |
| 156 | |
| 157 | substream = pcm->streams[stream].substream; |
| 158 | if (!substream) |
| 159 | continue; |
| 160 | |
| 161 | buf = &substream->dma_buffer; |
| 162 | if (!buf->area) |
| 163 | continue; |
| 164 | gen_pool_free(gpool, (unsigned long)buf->area, size); |
| 165 | buf->area = NULL; |
| 166 | } |
| 167 | |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream, |
| 172 | int stream) |
| 173 | { |
| 174 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
| 175 | size_t size = mmp_pcm_hardware[stream].buffer_bytes_max; |
| 176 | struct gen_pool *gpool; |
| 177 | |
| 178 | buf->dev.type = SNDRV_DMA_TYPE_DEV; |
| 179 | buf->dev.dev = substream->pcm->card->dev; |
| 180 | buf->private_data = NULL; |
| 181 | |
| 182 | gpool = sram_get_gpool("asram"); |
| 183 | if (!gpool) |
| 184 | return -ENOMEM; |
| 185 | |
Nicolin Chen | 92a2e1c | 2013-11-12 15:10:00 -0800 | [diff] [blame] | 186 | buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr); |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 187 | if (!buf->area) |
| 188 | return -ENOMEM; |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 189 | buf->bytes = size; |
| 190 | return 0; |
| 191 | } |
| 192 | |
Lars-Peter Clausen | 60e10d2 | 2013-05-14 22:19:51 +0200 | [diff] [blame] | 193 | static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd) |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 194 | { |
| 195 | struct snd_pcm_substream *substream; |
| 196 | struct snd_pcm *pcm = rtd->pcm; |
| 197 | int ret = 0, stream; |
| 198 | |
| 199 | for (stream = 0; stream < 2; stream++) { |
| 200 | substream = pcm->streams[stream].substream; |
| 201 | |
| 202 | ret = mmp_pcm_preallocate_dma_buffer(substream, stream); |
| 203 | if (ret) |
| 204 | goto err; |
| 205 | } |
| 206 | |
| 207 | return 0; |
| 208 | |
| 209 | err: |
| 210 | mmp_pcm_free_dma_buffers(pcm); |
| 211 | return ret; |
| 212 | } |
| 213 | |
Lars-Peter Clausen | 60e10d2 | 2013-05-14 22:19:51 +0200 | [diff] [blame] | 214 | static struct snd_soc_platform_driver mmp_soc_platform = { |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 215 | .ops = &mmp_pcm_ops, |
| 216 | .pcm_new = mmp_pcm_new, |
| 217 | .pcm_free = mmp_pcm_free_dma_buffers, |
| 218 | }; |
| 219 | |
Bill Pemberton | 570f6fe | 2012-12-07 09:26:17 -0500 | [diff] [blame] | 220 | static int mmp_pcm_probe(struct platform_device *pdev) |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 221 | { |
| 222 | struct mmp_audio_platdata *pdata = pdev->dev.platform_data; |
| 223 | |
| 224 | if (pdata) { |
| 225 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max = |
| 226 | pdata->buffer_max_playback; |
| 227 | mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max = |
| 228 | pdata->period_max_playback; |
| 229 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max = |
| 230 | pdata->buffer_max_capture; |
| 231 | mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max = |
| 232 | pdata->period_max_capture; |
| 233 | } |
| 234 | return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform); |
| 235 | } |
| 236 | |
Bill Pemberton | 570f6fe | 2012-12-07 09:26:17 -0500 | [diff] [blame] | 237 | static int mmp_pcm_remove(struct platform_device *pdev) |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 238 | { |
| 239 | snd_soc_unregister_platform(&pdev->dev); |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | static struct platform_driver mmp_pcm_driver = { |
| 244 | .driver = { |
| 245 | .name = "mmp-pcm-audio", |
| 246 | .owner = THIS_MODULE, |
| 247 | }, |
| 248 | |
| 249 | .probe = mmp_pcm_probe, |
Bill Pemberton | 570f6fe | 2012-12-07 09:26:17 -0500 | [diff] [blame] | 250 | .remove = mmp_pcm_remove, |
Zhangfei Gao | 7a824e2 | 2012-06-11 18:04:38 +0800 | [diff] [blame] | 251 | }; |
| 252 | |
| 253 | module_platform_driver(mmp_pcm_driver); |
| 254 | |
| 255 | MODULE_AUTHOR("Leo Yan <leoy@marvell.com>"); |
| 256 | MODULE_DESCRIPTION("MMP Soc Audio DMA module"); |
| 257 | MODULE_LICENSE("GPL"); |