Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2012 |
| 3 | * |
| 4 | * Author: Ola Lilja <ola.o.lilja@stericsson.com>, |
| 5 | * Roger Nilsson <roger.xr.nilsson@stericsson.com> |
| 6 | * for ST-Ericsson. |
| 7 | * |
| 8 | * License terms: |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as published |
| 12 | * by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <asm/page.h> |
| 16 | |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/dma-mapping.h> |
| 19 | #include <linux/dmaengine.h> |
| 20 | #include <linux/slab.h> |
Linus Walleij | 865fab6 | 2012-10-18 14:20:16 +0200 | [diff] [blame] | 21 | #include <linux/platform_data/dma-ste-dma40.h> |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 22 | |
| 23 | #include <sound/pcm.h> |
| 24 | #include <sound/pcm_params.h> |
| 25 | #include <sound/soc.h> |
| 26 | #include <sound/dmaengine_pcm.h> |
| 27 | |
| 28 | #include "ux500_msp_i2s.h" |
| 29 | #include "ux500_pcm.h" |
| 30 | |
Lars-Peter Clausen | 69b6f19 | 2013-04-03 11:02:55 +0200 | [diff] [blame] | 31 | #define UX500_PLATFORM_MIN_RATE 8000 |
| 32 | #define UX500_PLATFORM_MAX_RATE 48000 |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 33 | |
Lars-Peter Clausen | 69b6f19 | 2013-04-03 11:02:55 +0200 | [diff] [blame] | 34 | #define UX500_PLATFORM_MIN_CHANNELS 1 |
| 35 | #define UX500_PLATFORM_MAX_CHANNELS 8 |
| 36 | |
| 37 | #define UX500_PLATFORM_PERIODS_BYTES_MIN 128 |
| 38 | #define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE) |
| 39 | #define UX500_PLATFORM_PERIODS_MIN 2 |
| 40 | #define UX500_PLATFORM_PERIODS_MAX 48 |
| 41 | #define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE) |
| 42 | |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 43 | static const struct snd_pcm_hardware ux500_pcm_hw = { |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 44 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
| 45 | SNDRV_PCM_INFO_MMAP | |
| 46 | SNDRV_PCM_INFO_RESUME | |
| 47 | SNDRV_PCM_INFO_PAUSE, |
| 48 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
| 49 | SNDRV_PCM_FMTBIT_U16_LE | |
| 50 | SNDRV_PCM_FMTBIT_S16_BE | |
| 51 | SNDRV_PCM_FMTBIT_U16_BE, |
| 52 | .rates = SNDRV_PCM_RATE_KNOT, |
Lars-Peter Clausen | 69b6f19 | 2013-04-03 11:02:55 +0200 | [diff] [blame] | 53 | .rate_min = UX500_PLATFORM_MIN_RATE, |
| 54 | .rate_max = UX500_PLATFORM_MAX_RATE, |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 55 | .channels_min = UX500_PLATFORM_MIN_CHANNELS, |
| 56 | .channels_max = UX500_PLATFORM_MAX_CHANNELS, |
| 57 | .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX, |
| 58 | .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN, |
| 59 | .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX, |
| 60 | .periods_min = UX500_PLATFORM_PERIODS_MIN, |
| 61 | .periods_max = UX500_PLATFORM_PERIODS_MAX, |
| 62 | }; |
| 63 | |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 64 | static struct dma_chan *ux500_pcm_request_chan(struct snd_soc_pcm_runtime *rtd, |
| 65 | struct snd_pcm_substream *substream) |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 66 | { |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 67 | struct snd_soc_dai *dai = rtd->cpu_dai; |
| 68 | struct device *dev = dai->dev; |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 69 | u16 per_data_width, mem_data_width; |
| 70 | struct stedma40_chan_cfg *dma_cfg; |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 71 | struct ux500_msp_dma_params *dma_params; |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 72 | |
| 73 | dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id, |
| 74 | snd_pcm_stream_str(substream)); |
| 75 | |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 76 | dma_params = snd_soc_dai_get_dma_data(dai, substream); |
| 77 | dma_cfg = dma_params->dma_cfg; |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 78 | |
| 79 | mem_data_width = STEDMA40_HALFWORD_WIDTH; |
| 80 | |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 81 | switch (dma_params->data_size) { |
| 82 | case 32: |
| 83 | per_data_width = STEDMA40_WORD_WIDTH; |
| 84 | break; |
| 85 | case 16: |
| 86 | per_data_width = STEDMA40_HALFWORD_WIDTH; |
| 87 | break; |
| 88 | case 8: |
| 89 | per_data_width = STEDMA40_BYTE_WIDTH; |
| 90 | break; |
| 91 | default: |
| 92 | per_data_width = STEDMA40_WORD_WIDTH; |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 93 | } |
| 94 | |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 95 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 96 | dma_cfg->src_info.data_width = mem_data_width; |
| 97 | dma_cfg->dst_info.data_width = per_data_width; |
| 98 | } else { |
| 99 | dma_cfg->src_info.data_width = per_data_width; |
| 100 | dma_cfg->dst_info.data_width = mem_data_width; |
| 101 | } |
| 102 | |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 103 | return snd_dmaengine_pcm_request_channel(stedma40_filter, dma_cfg); |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 104 | } |
| 105 | |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 106 | static const struct snd_dmaengine_pcm_config ux500_dmaengine_pcm_config = { |
| 107 | .pcm_hardware = &ux500_pcm_hw, |
| 108 | .compat_request_channel = ux500_pcm_request_chan, |
| 109 | .prealloc_buffer_size = 128 * 1024, |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 110 | }; |
| 111 | |
Bill Pemberton | da79487 | 2012-12-07 09:26:35 -0500 | [diff] [blame] | 112 | int ux500_pcm_register_platform(struct platform_device *pdev) |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 113 | { |
| 114 | int ret; |
| 115 | |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 116 | ret = snd_dmaengine_pcm_register(&pdev->dev, |
| 117 | &ux500_dmaengine_pcm_config, |
| 118 | SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | |
| 119 | SND_DMAENGINE_PCM_FLAG_COMPAT | |
| 120 | SND_DMAENGINE_PCM_FLAG_NO_DT); |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 121 | if (ret < 0) { |
| 122 | dev_err(&pdev->dev, |
| 123 | "%s: ERROR: Failed to register platform '%s' (%d)!\n", |
| 124 | __func__, pdev->name, ret); |
| 125 | return ret; |
| 126 | } |
| 127 | |
| 128 | return 0; |
| 129 | } |
Lee Jones | 1428c20 | 2012-11-23 13:05:41 +0000 | [diff] [blame] | 130 | EXPORT_SYMBOL_GPL(ux500_pcm_register_platform); |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 131 | |
Bill Pemberton | da79487 | 2012-12-07 09:26:35 -0500 | [diff] [blame] | 132 | int ux500_pcm_unregister_platform(struct platform_device *pdev) |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 133 | { |
Lars-Peter Clausen | 22f38f7 | 2013-04-15 19:20:04 +0200 | [diff] [blame] | 134 | snd_dmaengine_pcm_unregister(&pdev->dev); |
Ola Lilja | 01a0c11 | 2012-05-24 15:26:32 +0200 | [diff] [blame] | 135 | return 0; |
| 136 | } |
Lee Jones | 1428c20 | 2012-11-23 13:05:41 +0000 | [diff] [blame] | 137 | EXPORT_SYMBOL_GPL(ux500_pcm_unregister_platform); |