projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 283b6124 GT |
1 | /* |
| 2 | * mtk-afe-platform-driver.c -- Mediatek afe platform driver | |
| 3 | * | |
| 4 | * Copyright (c) 2016 MediaTek Inc. | |
| 5 | * Author: Garlic Tseng <garlic.tseng@mediatek.com> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 and | |
| 9 | * only version 2 as published by the Free Software Foundation. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/module.h> | |
| 18 | #include <linux/dma-mapping.h> | |
| 19 | #include <sound/soc.h> | |
| 20 | ||
| 21 | #include "mtk-afe-platform-driver.h" | |
| 22 | #include "mtk-base-afe.h" | |
| 23 | ||
| 24 | static snd_pcm_uframes_t mtk_afe_pcm_pointer | |
| 25 | (struct snd_pcm_substream *substream) | |
| 26 | { | |
| 27 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
| f1b5bf07 KM |
28 | struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME); |
| 29 | struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component); | |
| 283b6124 GT |
30 | struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id]; |
| 31 | const struct mtk_base_memif_data *memif_data = memif->data; | |
| 32 | struct regmap *regmap = afe->regmap; | |
| 33 | struct device *dev = afe->dev; | |
| 34 | int reg_ofs_base = memif_data->reg_ofs_base; | |
| 35 | int reg_ofs_cur = memif_data->reg_ofs_cur; | |
| 36 | unsigned int hw_ptr = 0, hw_base = 0; | |
| 37 | int ret, pcm_ptr_bytes; | |
| 38 | ||
| 39 | ret = regmap_read(regmap, reg_ofs_cur, &hw_ptr); | |
| 40 | if (ret || hw_ptr == 0) { | |
| 41 | dev_err(dev, "%s hw_ptr err\n", __func__); | |
| 42 | pcm_ptr_bytes = 0; | |
| 43 | goto POINTER_RETURN_FRAMES; | |
| 44 | } | |
| 45 | ||
| 46 | ret = regmap_read(regmap, reg_ofs_base, &hw_base); | |
| 47 | if (ret || hw_base == 0) { | |
| 48 | dev_err(dev, "%s hw_ptr err\n", __func__); | |
| 49 | pcm_ptr_bytes = 0; | |
| 50 | goto POINTER_RETURN_FRAMES; | |
| 51 | } | |
| 52 | ||
| 53 | pcm_ptr_bytes = hw_ptr - hw_base; | |
| 54 | ||
| 55 | POINTER_RETURN_FRAMES: | |
| 56 | return bytes_to_frames(substream->runtime, pcm_ptr_bytes); | |
| 57 | } | |
| 58 | ||
| 59 | static const struct snd_pcm_ops mtk_afe_pcm_ops = { | |
| 60 | .ioctl = snd_pcm_lib_ioctl, | |
| 61 | .pointer = mtk_afe_pcm_pointer, | |
| 62 | }; | |
| 63 | ||
| 64 | static int mtk_afe_pcm_new(struct snd_soc_pcm_runtime *rtd) | |
| 65 | { | |
| 66 | size_t size; | |
| 67 | struct snd_card *card = rtd->card->snd_card; | |
| 68 | struct snd_pcm *pcm = rtd->pcm; | |
| f1b5bf07 KM |
69 | struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME); |
| 70 | struct mtk_base_afe *afe = snd_soc_component_get_drvdata(component); | |
| 283b6124 GT |
71 | |
| 72 | size = afe->mtk_afe_hardware->buffer_bytes_max; | |
| 73 | return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, | |
| 74 | card->dev, size, size); | |
| 75 | } | |
| 76 | ||
| 77 | static void mtk_afe_pcm_free(struct snd_pcm *pcm) | |
| 78 | { | |
| 79 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
| 80 | } | |
| 81 | ||
| f1b5bf07 KM |
82 | const struct snd_soc_component_driver mtk_afe_pcm_platform = { |
| 83 | .name = AFE_PCM_NAME, | |
| 283b6124 GT |
84 | .ops = &mtk_afe_pcm_ops, |
| 85 | .pcm_new = mtk_afe_pcm_new, | |
| 86 | .pcm_free = mtk_afe_pcm_free, | |
| 87 | }; | |
| 88 | EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform); | |
| 89 | ||
| 90 | MODULE_DESCRIPTION("Mediatek simple platform driver"); | |
| 91 | MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>"); | |
| 92 | MODULE_LICENSE("GPL v2"); | |
| 93 |