diff options
Diffstat (limited to 'sound/soc/ux500/ux500_pcm.c')
-rw-r--r-- | sound/soc/ux500/ux500_pcm.c | 430 |
1 files changed, 430 insertions, 0 deletions
diff --git a/sound/soc/ux500/ux500_pcm.c b/sound/soc/ux500/ux500_pcm.c new file mode 100644 index 00000000000..29b3f5e0ffb --- /dev/null +++ b/sound/soc/ux500/ux500_pcm.c @@ -0,0 +1,430 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Ola Lilja <ola.o.lilja@stericsson.com>, + * Roger Nilsson <roger.xr.nilsson@stericsson.com> + * for ST-Ericsson. + * + * License terms: + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include <asm/page.h> + +#include <linux/dma-mapping.h> +#include <linux/dmaengine.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/slab.h> + +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include "ux500_pcm.h" +#include "ux500_msp_dai.h" + +static struct snd_pcm_hardware ux500_pcm_hw_playback = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_PAUSE, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_U16_LE | + SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_U16_BE, + .rates = SNDRV_PCM_RATE_KNOT, + .rate_min = UX500_PLATFORM_MIN_RATE_PLAYBACK, + .rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK, + .channels_min = UX500_PLATFORM_MIN_CHANNELS, + .channels_max = UX500_PLATFORM_MAX_CHANNELS, + .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX, + .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN, + .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX, + .periods_min = UX500_PLATFORM_PERIODS_MIN, + .periods_max = UX500_PLATFORM_PERIODS_MAX, +}; + +static struct snd_pcm_hardware ux500_pcm_hw_capture = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_PAUSE, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_U16_LE | + SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_U16_BE, + .rates = SNDRV_PCM_RATE_KNOT, + .rate_min = UX500_PLATFORM_MIN_RATE_CAPTURE, + .rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE, + .channels_min = UX500_PLATFORM_MIN_CHANNELS, + .channels_max = UX500_PLATFORM_MAX_CHANNELS, + .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX, + .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN, + .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX, + .periods_min = UX500_PLATFORM_PERIODS_MIN, + .periods_max = UX500_PLATFORM_PERIODS_MAX, +}; + +static const char *stream_str(struct snd_pcm_substream *substream) +{ + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + return "Playback"; + else + return "Capture"; +} + +static void ux500_pcm_dma_hw_free(struct device *dev, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_dma_buffer *buf = runtime->dma_buffer_p; + + if (runtime->dma_area == NULL) + return; + + if (buf != &substream->dma_buffer) { + dma_free_coherent( + buf->dev.dev, + buf->bytes, + buf->area, + buf->addr); + kfree(runtime->dma_buffer_p); + } + + snd_pcm_set_runtime_buffer(substream, NULL); +} + +void ux500_pcm_dma_eot_handler(void *data) +{ + struct snd_pcm_substream *substream = data; + struct snd_pcm_runtime *runtime; + struct ux500_pcm_private *private; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *dai = rtd->cpu_dai; + + pr_debug("%s: MSP %d (%s): Enter.\n", __func__, dai->id, stream_str(substream)); + + if (substream) { + runtime = substream->runtime; + private = substream->runtime->private_data; + + if (ux500_msp_dai_i2s_get_underrun_status(private->msp_id)) { + private->no_of_underruns++; + pr_debug("%s: Nr of underruns (%d)\n", __func__, + private->no_of_underruns); + } + + /* calc the offset in the circular buffer */ + private->offset += frames_to_bytes(runtime, + runtime->period_size); + private->offset %= frames_to_bytes(runtime, + runtime->period_size) * runtime->periods; + + snd_pcm_period_elapsed(substream); + } +} +EXPORT_SYMBOL(ux500_pcm_dma_eot_handler); + +static int ux500_pcm_open(struct snd_pcm_substream *substream) +{ + int stream_id = substream->pstr->stream; + struct snd_pcm_runtime *runtime = substream->runtime; + struct ux500_pcm_private *private; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *dai = rtd->cpu_dai; + int ret; + + pr_debug("%s: MSP %d (%s): Enter.\n", __func__, dai->id, stream_str(substream)); + + pr_debug("%s: Set runtime hwparams.\n", __func__); + if (stream_id == SNDRV_PCM_STREAM_PLAYBACK) + snd_soc_set_runtime_hwparams(substream, &ux500_pcm_hw_playback); + else + snd_soc_set_runtime_hwparams(substream, &ux500_pcm_hw_capture); + + /* ensure that buffer size is a multiple of period size */ + ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) { + pr_err("%s: Error: snd_pcm_hw_constraints failed (%d)\n", + __func__, + ret); + return ret; + } + + pr_debug("%s: Init runtime private data.\n", __func__); + private = kzalloc(sizeof(struct ux500_pcm_private), GFP_KERNEL); + if (private == NULL) + return -ENOMEM; + private->msp_id = dai->id; + runtime->private_data = private; + + pr_debug("%s: Set hw-struct for %s.\n", __func__, stream_str(substream)); + runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ? + ux500_pcm_hw_playback : ux500_pcm_hw_capture; + + return 0; +} + +static int ux500_pcm_close(struct snd_pcm_substream *substream) +{ + struct ux500_pcm_private *private = substream->runtime->private_data; + + pr_debug("%s: Enter\n", __func__); + + kfree(private); + + return 0; +} + +static int ux500_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_dma_buffer *buf = runtime->dma_buffer_p; + int ret = 0; + int size; + + pr_debug("%s: Enter\n", __func__); + + size = params_buffer_bytes(hw_params); + + if (buf) { + if (buf->bytes >= size) + goto out; + ux500_pcm_dma_hw_free(NULL, substream); + } + + if (substream->dma_buffer.area != NULL && + substream->dma_buffer.bytes >= size) { + buf = &substream->dma_buffer; + } else { + buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL); + if (!buf) + goto nomem; + + buf->dev.type = SNDRV_DMA_TYPE_DEV; + buf->dev.dev = NULL; + buf->area = dma_alloc_coherent( + NULL, + size, + &buf->addr, + GFP_KERNEL); + buf->bytes = size; + buf->private_data = NULL; + + if (!buf->area) + goto free; + } + snd_pcm_set_runtime_buffer(substream, buf); + ret = 1; + out: + runtime->dma_bytes = size; + return ret; + + free: + kfree(buf); + nomem: + return -ENOMEM; +} + +static int ux500_pcm_hw_free(struct snd_pcm_substream *substream) +{ + pr_debug("%s: Enter\n", __func__); + + ux500_pcm_dma_hw_free(NULL, substream); + + return 0; +} + +static int ux500_pcm_prepare(struct snd_pcm_substream *substream) +{ + pr_debug("%s: Enter\n", __func__); + return 0; +} + +static int ux500_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + int ret; + struct snd_pcm_runtime *runtime = substream->runtime; + struct ux500_pcm_private *private = runtime->private_data; + int stream_id = substream->pstr->stream; + + pr_debug("%s: Enter\n", __func__); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + pr_debug("%s: START/PAUSE-RELEASE\n", __func__); + if (runtime->status->state == SNDRV_PCM_STATE_XRUN) { + pr_debug("XRUN occurred\n"); + return 0; + } + + private->no_of_underruns = 0; + private->offset = 0; + ret = ux500_msp_dai_i2s_configure_sg(runtime->dma_addr, + runtime->periods, + frames_to_bytes(runtime, runtime->period_size), + private->msp_id, + stream_id); + if (ret) { + pr_err("%s: Failed to configure I2S!\n", __func__); + return -EINVAL; + } + break; + + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + break; + + case SNDRV_PCM_TRIGGER_STOP: + pr_debug("%s: SNDRV_PCM_TRIGGER_STOP\n", __func__); + pr_debug("%s: no_of_underruns = %u\n", + __func__, + private->no_of_underruns); + break; + + default: + pr_err("%s: Invalid command in pcm trigger\n", + __func__); + return -EINVAL; + } + + return 0; +} + +static snd_pcm_uframes_t ux500_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct ux500_pcm_private *private = runtime->private_data; + + pr_debug("%s: dma_offset %d frame %ld\n", __func__, private->offset, + bytes_to_frames(substream->runtime, private->offset)); + + return bytes_to_frames(substream->runtime, private->offset); +} + +static int ux500_pcm_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + pr_debug("%s: Enter.\n", __func__); + + return dma_mmap_coherent( + NULL, + vma, + runtime->dma_area, + runtime->dma_addr, + runtime->dma_bytes); +} + +static struct snd_pcm_ops ux500_pcm_ops = { + .open = ux500_pcm_open, + .close = ux500_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = ux500_pcm_hw_params, + .hw_free = ux500_pcm_hw_free, + .prepare = ux500_pcm_prepare, + .trigger = ux500_pcm_trigger, + .pointer = ux500_pcm_pointer, + .mmap = ux500_pcm_mmap +}; + +int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_pcm *pcm = rtd->pcm; + + pr_debug("%s: pcm = %d\n", __func__, (int)pcm); + + pcm->info_flags = 0; + strcpy(pcm->name, "UX500_PCM"); + + pr_debug("%s: pcm->name = %s.\n", __func__, pcm->name); + + return 0; +} + +static void ux500_pcm_free(struct snd_pcm *pcm) +{ + pr_debug("%s: Enter\n", __func__); +} + +static int ux500_pcm_suspend(struct snd_soc_dai *dai) +{ + pr_debug("%s: Enter\n", __func__); + + return 0; +} + +static int ux500_pcm_resume(struct snd_soc_dai *dai) +{ + pr_debug("%s: Enter\n", __func__); + + return 0; +} + +struct snd_soc_platform_driver ux500_pcm_soc_drv = { + .ops = &ux500_pcm_ops, + .pcm_new = ux500_pcm_new, + .pcm_free = ux500_pcm_free, + .suspend = ux500_pcm_suspend, + .resume = ux500_pcm_resume, +}; +EXPORT_SYMBOL(ux500_pcm_soc_drv); + +static int __devexit ux500_pcm_drv_probe(struct platform_device *pdev) +{ + int ret; + + pr_info("%s: Register ux500-pcm SoC platform driver.\n", __func__); + ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv); + if (ret < 0) { + pr_err("%s: Error: Failed to register " + "ux500-pcm SoC platform driver (%d)!\n", + __func__, + ret); + return ret; + } + + return 0; +} + +static int __devinit ux500_pcm_drv_remove(struct platform_device *pdev) +{ + pr_info("%s: Unregister ux500-pcm SoC platform driver.\n", __func__); + snd_soc_unregister_platform(&pdev->dev); + + return 0; +} + +static struct platform_driver ux500_pcm_driver = { + .driver = { + .name = "ux500-pcm", + .owner = THIS_MODULE, + }, + + .probe = ux500_pcm_drv_probe, + .remove = __devexit_p(ux500_pcm_drv_remove), +}; + +static int __init ux500_pcm_drv_init(void) +{ + pr_debug("%s: Register ux500-pcm platform driver.\n", __func__); + + return platform_driver_register(&ux500_pcm_driver); +} + +static void __exit ux500_pcm_drv_exit(void) +{ + pr_debug("%s: Unregister ux500-pcm platform driver.\n", __func__); + + platform_driver_unregister(&ux500_pcm_driver); +} + +module_init(ux500_pcm_drv_init); +module_exit(ux500_pcm_drv_exit); + +MODULE_LICENSE("GPL"); |