--- /dev/null
+/*
+ * mtk-afe-fe-dais.c -- Mediatek afe fe dai operator
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include "mtk-afe-fe-dai.h"
+#include "mtk-base-afe.h"
+
+#define AFE_BASE_END_OFFSET 8
+
+int mtk_regmap_update_bits(struct regmap *map, int reg, unsigned int mask,
+ unsigned int val)
+{
+ if (reg < 0)
+ return 0;
+ return regmap_update_bits(map, reg, mask, val);
+}
+
+int mtk_regmap_write(struct regmap *map, int reg, unsigned int val)
+{
+ if (reg < 0)
+ return 0;
+ return regmap_write(map, reg, val);
+}
+
+int mtk_afe_fe_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int memif_num = rtd->cpu_dai->id;
+ struct mtk_base_afe_memif *memif = &afe->memif[memif_num];
+ const struct snd_pcm_hardware *mtk_afe_hardware = afe->mtk_afe_hardware;
+ int ret;
+
+ memif->substream = substream;
+
+ snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16);
+ /* enable agent */
+ mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
+ 1 << memif->data->agent_disable_shift,
+ 0 << memif->data->agent_disable_shift);
+
+ snd_soc_set_runtime_hwparams(substream, mtk_afe_hardware);
+
+ /*
+ * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be
+ * smaller than period_size due to AFE's internal buffer.
+ * This easily leads to overrun when avail_min is period_size.
+ * One more period can hold the possible unread buffer.
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ int periods_max = mtk_afe_hardware->periods_max;
+
+ ret = snd_pcm_hw_constraint_minmax(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS,
+ 3, periods_max);
+ if (ret < 0) {
+ dev_err(afe->dev, "hw_constraint_minmax failed\n");
+ return ret;
+ }
+ }
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n");
+
+ /* dynamic allocate irq to memif */
+ if (memif->irq_usage < 0) {
+ int irq_id = mtk_dynamic_irq_acquire(afe);
+
+ if (irq_id != afe->irqs_size) {
+ /* link */
+ memif->irq_usage = irq_id;
+ } else {
+ dev_err(afe->dev, "%s() error: no more asys irq\n",
+ __func__);
+ ret = -EBUSY;
+ }
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_startup);
+
+void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+ struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+ int irq_id;
+
+ irq_id = memif->irq_usage;
+
+ mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
+ 1 << memif->data->agent_disable_shift,
+ 1 << memif->data->agent_disable_shift);
+
+ if (!memif->const_irq) {
+ mtk_dynamic_irq_release(afe, irq_id);
+ memif->irq_usage = -1;
+ memif->substream = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_shutdown);
+
+int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+ struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+ int msb_at_bit33 = 0;
+ int ret, fs = 0;
+
+ ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
+ if (ret < 0)
+ return ret;
+
+ msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0;
+ memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr);
+ memif->buffer_size = substream->runtime->dma_bytes;
+
+ /* start */
+ mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base,
+ memif->phys_buf_addr);
+ /* end */
+ mtk_regmap_write(afe->regmap,
+ memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
+ memif->phys_buf_addr + memif->buffer_size - 1);
+
+ /* set MSB to 33-bit */
+ mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg,
+ 1 << memif->data->msb_shift,
+ msb_at_bit33 << memif->data->msb_shift);
+
+ /* set channel */
+ if (memif->data->mono_shift >= 0) {
+ unsigned int mono = (params_channels(params) == 1) ? 1 : 0;
+
+ mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg,
+ 1 << memif->data->mono_shift,
+ mono << memif->data->mono_shift);
+ }
+
+ /* set rate */
+ if (memif->data->fs_shift < 0)
+ return 0;
+
+ fs = afe->memif_fs(substream, params_rate(params));
+
+ if (fs < 0)
+ return -EINVAL;
+
+ mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg,
+ memif->data->fs_maskbit << memif->data->fs_shift,
+ fs << memif->data->fs_shift);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params);
+
+int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free);
+
+int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_pcm_runtime * const runtime = substream->runtime;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+ struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+ struct mtk_base_afe_irq *irqs = &afe->irqs[memif->irq_usage];
+ const struct mtk_base_irq_data *irq_data = irqs->irq_data;
+ unsigned int counter = runtime->period_size;
+ int fs;
+
+ dev_dbg(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ if (memif->data->enable_shift >= 0)
+ mtk_regmap_update_bits(afe->regmap,
+ memif->data->enable_reg,
+ 1 << memif->data->enable_shift,
+ 1 << memif->data->enable_shift);
+
+ /* set irq counter */
+ mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg,
+ irq_data->irq_cnt_maskbit
+ << irq_data->irq_cnt_shift,
+ counter << irq_data->irq_cnt_shift);
+
+ /* set irq fs */
+ fs = afe->irq_fs(substream, runtime->rate);
+
+ if (fs < 0)
+ return -EINVAL;
+
+ mtk_regmap_update_bits(afe->regmap, irq_data->irq_fs_reg,
+ irq_data->irq_fs_maskbit
+ << irq_data->irq_fs_shift,
+ fs << irq_data->irq_fs_shift);
+
+ /* enable interrupt */
+ mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
+ 1 << irq_data->irq_en_shift,
+ 1 << irq_data->irq_en_shift);
+
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
+ 1 << memif->data->enable_shift, 0);
+ /* disable interrupt */
+ mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
+ 1 << irq_data->irq_en_shift,
+ 0 << irq_data->irq_en_shift);
+ /* and clear pending IRQ */
+ mtk_regmap_write(afe->regmap, irq_data->irq_clr_reg,
+ 1 << irq_data->irq_clr_shift);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_trigger);
+
+int mtk_afe_fe_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+ struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+ int hd_audio = 0;
+
+ /* set hd mode */
+ switch (substream->runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ hd_audio = 0;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ hd_audio = 1;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ hd_audio = 1;
+ break;
+ default:
+ dev_err(afe->dev, "%s() error: unsupported format %d\n",
+ __func__, substream->runtime->format);
+ break;
+ }
+
+ mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg,
+ 1 << memif->data->hd_shift,
+ hd_audio << memif->data->hd_shift);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_fe_prepare);
+
+const struct snd_soc_dai_ops mtk_afe_fe_ops = {
+ .startup = mtk_afe_fe_startup,
+ .shutdown = mtk_afe_fe_shutdown,
+ .hw_params = mtk_afe_fe_hw_params,
+ .hw_free = mtk_afe_fe_hw_free,
+ .prepare = mtk_afe_fe_prepare,
+ .trigger = mtk_afe_fe_trigger,
+};
+EXPORT_SYMBOL_GPL(mtk_afe_fe_ops);
+
+static DEFINE_MUTEX(irqs_lock);
+int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe)
+{
+ int i;
+
+ mutex_lock(&afe->irq_alloc_lock);
+ for (i = 0; i < afe->irqs_size; ++i) {
+ if (afe->irqs[i].irq_occupyed == 0) {
+ afe->irqs[i].irq_occupyed = 1;
+ mutex_unlock(&afe->irq_alloc_lock);
+ return i;
+ }
+ }
+ mutex_unlock(&afe->irq_alloc_lock);
+ return afe->irqs_size;
+}
+EXPORT_SYMBOL_GPL(mtk_dynamic_irq_acquire);
+
+int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id)
+{
+ mutex_lock(&afe->irq_alloc_lock);
+ if (irq_id >= 0 && irq_id < afe->irqs_size) {
+ afe->irqs[irq_id].irq_occupyed = 0;
+ mutex_unlock(&afe->irq_alloc_lock);
+ return 0;
+ }
+ mutex_unlock(&afe->irq_alloc_lock);
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(mtk_dynamic_irq_release);
+
+int mtk_afe_dai_suspend(struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
+ struct device *dev = afe->dev;
+ struct regmap *regmap = afe->regmap;
+ int i;
+
+ if (pm_runtime_status_suspended(dev) || afe->suspended)
+ return 0;
+
+ if (!afe->reg_back_up)
+ afe->reg_back_up =
+ devm_kcalloc(dev, afe->reg_back_up_list_num,
+ sizeof(unsigned int), GFP_KERNEL);
+
+ for (i = 0; i < afe->reg_back_up_list_num; i++)
+ regmap_read(regmap, afe->reg_back_up_list[i],
+ &afe->reg_back_up[i]);
+
+ afe->suspended = true;
+ afe->runtime_suspend(dev);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_dai_suspend);
+
+int mtk_afe_dai_resume(struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
+ struct device *dev = afe->dev;
+ struct regmap *regmap = afe->regmap;
+ int i = 0;
+
+ if (pm_runtime_status_suspended(dev) || !afe->suspended)
+ return 0;
+
+ afe->runtime_resume(dev);
+
+ if (!afe->reg_back_up)
+ dev_dbg(dev, "%s no reg_backup\n", __func__);
+
+ for (i = 0; i < afe->reg_back_up_list_num; i++)
+ mtk_regmap_write(regmap, afe->reg_back_up_list[i],
+ afe->reg_back_up[i]);
+
+ afe->suspended = false;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_afe_dai_resume);
+
+MODULE_DESCRIPTION("Mediatek simple fe dai operator");
+MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
+MODULE_LICENSE("GPL v2");
+
--- /dev/null
+/*
+ * mtk-afe-platform-driver.c -- Mediatek afe platform driver
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Garlic Tseng <garlic.tseng@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <sound/soc.h>
+
+#include "mtk-afe-platform-driver.h"
+#include "mtk-base-afe.h"
+
+static snd_pcm_uframes_t mtk_afe_pcm_pointer
+ (struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+ struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
+ const struct mtk_base_memif_data *memif_data = memif->data;
+ struct regmap *regmap = afe->regmap;
+ struct device *dev = afe->dev;
+ int reg_ofs_base = memif_data->reg_ofs_base;
+ int reg_ofs_cur = memif_data->reg_ofs_cur;
+ unsigned int hw_ptr = 0, hw_base = 0;
+ int ret, pcm_ptr_bytes;
+
+ ret = regmap_read(regmap, reg_ofs_cur, &hw_ptr);
+ if (ret || hw_ptr == 0) {
+ dev_err(dev, "%s hw_ptr err\n", __func__);
+ pcm_ptr_bytes = 0;
+ goto POINTER_RETURN_FRAMES;
+ }
+
+ ret = regmap_read(regmap, reg_ofs_base, &hw_base);
+ if (ret || hw_base == 0) {
+ dev_err(dev, "%s hw_ptr err\n", __func__);
+ pcm_ptr_bytes = 0;
+ goto POINTER_RETURN_FRAMES;
+ }
+
+ pcm_ptr_bytes = hw_ptr - hw_base;
+
+POINTER_RETURN_FRAMES:
+ return bytes_to_frames(substream->runtime, pcm_ptr_bytes);
+}
+
+static const struct snd_pcm_ops mtk_afe_pcm_ops = {
+ .ioctl = snd_pcm_lib_ioctl,
+ .pointer = mtk_afe_pcm_pointer,
+};
+
+static int mtk_afe_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+ size_t size;
+ struct snd_card *card = rtd->card->snd_card;
+ struct snd_pcm *pcm = rtd->pcm;
+ struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
+
+ size = afe->mtk_afe_hardware->buffer_bytes_max;
+ return snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ card->dev, size, size);
+}
+
+static void mtk_afe_pcm_free(struct snd_pcm *pcm)
+{
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+const struct snd_soc_platform_driver mtk_afe_pcm_platform = {
+ .ops = &mtk_afe_pcm_ops,
+ .pcm_new = mtk_afe_pcm_new,
+ .pcm_free = mtk_afe_pcm_free,
+};
+EXPORT_SYMBOL_GPL(mtk_afe_pcm_platform);
+
+MODULE_DESCRIPTION("Mediatek simple platform driver");
+MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
+MODULE_LICENSE("GPL v2");
+
projects / cascardo / linux.git / commitdiff