diff options
Diffstat (limited to 'sound/soc/ux500/ux500_pcm.c')
-rw-r--r-- | sound/soc/ux500/ux500_pcm.c | 571 |
1 files changed, 571 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..6b6680b878c --- /dev/null +++ b/sound/soc/ux500/ux500_pcm.c @@ -0,0 +1,571 @@ +/* + * 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 <linux/workqueue.h> + +#include <plat/ste_dma40.h> + +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include "ux500_pcm.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_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; + + /* 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); + } +} + +static int +ux500_pcm_dma_start( + struct snd_pcm_substream *substream, + dma_addr_t dma_addr, + int period_cnt, + size_t period_len, + int dai_idx, + int stream_id) +{ + dma_cookie_t status_submit; + int direction; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *dai = rtd->cpu_dai; + struct ux500_pcm_private *private = runtime->private_data; + struct dma_async_tx_descriptor *cdesc; + struct ux500_pcm_dma_params *dma_params; + + pr_debug("%s: Enter\n", __func__); + + dma_params = snd_soc_dai_get_dma_data(dai, substream); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + direction = DMA_TO_DEVICE; + else + direction = DMA_FROM_DEVICE; + + cdesc = private->pipeid->device->device_prep_dma_cyclic( + private->pipeid, + dma_addr, + period_cnt * period_len, + period_len, + direction, + NULL); + + if (IS_ERR(cdesc)) { + pr_err("%s: ERROR: device_prep_dma_cyclic failed (%ld)!\n", + __func__, + PTR_ERR(cdesc)); + return -EINVAL; + } + + cdesc->callback = ux500_pcm_dma_eot_handler; + cdesc->callback_param = substream; + + status_submit = dmaengine_submit(cdesc); + + if (dma_submit_error(status_submit)) { + pr_err("%s: ERROR: dmaengine_submit failed!\n", __func__); + return -EINVAL; + } + + dma_async_issue_pending(private->pipeid); + + return 0; +} + +static void +ux500_pcm_dma_stop(struct work_struct *work) +{ + struct ux500_pcm_private *private = container_of(work, + struct ux500_pcm_private, ws_stop); + + if (private->pipeid != NULL) { + dmaengine_terminate_all(private->pipeid); + dma_release_channel(private->pipeid); + private->pipeid = NULL; + } +} + +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); +} + +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; + private->wq = alloc_ordered_workqueue("ux500/pcm", 0); + INIT_WORK(&private->ws_stop, ux500_pcm_dma_stop); + + 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__); + + if (private->pipeid != NULL) { + dma_release_channel(private->pipeid); + private->pipeid = NULL; + } + + destroy_workqueue(private->wq); + 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) +{ + struct stedma40_chan_cfg *dma_cfg; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *dai = rtd->cpu_dai; + struct ux500_pcm_private *private = runtime->private_data; + struct ux500_pcm_dma_params *dma_params; + dma_cap_mask_t mask; + u16 per_data_width, mem_data_width; + + pr_debug("%s: Enter\n", __func__); + + if (private->pipeid != NULL) { + dma_release_channel(private->pipeid); + private->pipeid = NULL; + } + + dma_params = snd_soc_dai_get_dma_data(dai, substream); + + mem_data_width = STEDMA40_HALFWORD_WIDTH; + + switch (dma_params->data_size) { + case 32: + per_data_width = STEDMA40_WORD_WIDTH; + break; + case 16: + per_data_width = STEDMA40_HALFWORD_WIDTH; + break; + case 8: + per_data_width = STEDMA40_BYTE_WIDTH; + break; + default: + per_data_width = STEDMA40_WORD_WIDTH; + pr_warn("%s: Unknown data-size (%d)! Assuming 32 bits.\n", + __func__, dma_params->data_size); + } + + dma_cfg = dma_params->dma_cfg; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + dma_cfg->src_info.data_width = mem_data_width; + dma_cfg->dst_info.data_width = per_data_width; + } else { + dma_cfg->src_info.data_width = per_data_width; + dma_cfg->dst_info.data_width = mem_data_width; + } + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + private->pipeid = dma_request_channel(mask, stedma40_filter, dma_cfg); + + return 0; +} + +static int +ux500_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + int ret = 0; + 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->offset = 0; + ret = ux500_pcm_dma_start( + substream, + 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_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + pr_debug("%s: SNDRV_PCM_TRIGGER_STOP\n", __func__); + queue_work(private->wq, &private->ws_stop); + break; + + default: + pr_err("%s: Invalid command in pcm trigger\n", + __func__); + return -EINVAL; + } + + return ret; +} + +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"); |