diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/omap/omap-pcm.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/soc/omap/omap-pcm.c | 443 |
1 files changed, 0 insertions, 443 deletions
diff --git a/ANDROID_3.4.5/sound/soc/omap/omap-pcm.c b/ANDROID_3.4.5/sound/soc/omap/omap-pcm.c deleted file mode 100644 index 5a649da9..00000000 --- a/ANDROID_3.4.5/sound/soc/omap/omap-pcm.c +++ /dev/null @@ -1,443 +0,0 @@ -/* - * omap-pcm.c -- ALSA PCM interface for the OMAP SoC - * - * Copyright (C) 2008 Nokia Corporation - * - * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com> - * Peter Ujfalusi <peter.ujfalusi@ti.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 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA - * 02110-1301 USA - * - */ - -#include <linux/dma-mapping.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/soc.h> - -#include <plat/dma.h> -#include "omap-pcm.h" - -static const struct snd_pcm_hardware omap_pcm_hardware = { - .info = SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_PAUSE | - SNDRV_PCM_INFO_RESUME | - SNDRV_PCM_INFO_NO_PERIOD_WAKEUP, - .formats = SNDRV_PCM_FMTBIT_S16_LE | - SNDRV_PCM_FMTBIT_S32_LE, - .period_bytes_min = 32, - .period_bytes_max = 64 * 1024, - .periods_min = 2, - .periods_max = 255, - .buffer_bytes_max = 128 * 1024, -}; - -struct omap_runtime_data { - spinlock_t lock; - struct omap_pcm_dma_data *dma_data; - int dma_ch; - int period_index; -}; - -static void omap_pcm_dma_irq(int ch, u16 stat, void *data) -{ - struct snd_pcm_substream *substream = data; - struct snd_pcm_runtime *runtime = substream->runtime; - struct omap_runtime_data *prtd = runtime->private_data; - unsigned long flags; - - if ((cpu_is_omap1510())) { - /* - * OMAP1510 doesn't fully support DMA progress counter - * and there is no software emulation implemented yet, - * so have to maintain our own progress counters - * that can be used by omap_pcm_pointer() instead. - */ - spin_lock_irqsave(&prtd->lock, flags); - if ((stat == OMAP_DMA_LAST_IRQ) && - (prtd->period_index == runtime->periods - 1)) { - /* we are in sync, do nothing */ - spin_unlock_irqrestore(&prtd->lock, flags); - return; - } - if (prtd->period_index >= 0) { - if (stat & OMAP_DMA_BLOCK_IRQ) { - /* end of buffer reached, loop back */ - prtd->period_index = 0; - } else if (stat & OMAP_DMA_LAST_IRQ) { - /* update the counter for the last period */ - prtd->period_index = runtime->periods - 1; - } else if (++prtd->period_index >= runtime->periods) { - /* end of buffer missed? loop back */ - prtd->period_index = 0; - } - } - spin_unlock_irqrestore(&prtd->lock, flags); - } - - snd_pcm_period_elapsed(substream); -} - -/* this may get called several times by oss emulation */ -static int omap_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_soc_pcm_runtime *rtd = substream->private_data; - struct omap_runtime_data *prtd = runtime->private_data; - struct omap_pcm_dma_data *dma_data; - - int err = 0; - - dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - - /* return if this is a bufferless transfer e.g. - * codec <--> BT codec or GSM modem -- lg FIXME */ - if (!dma_data) - return 0; - - snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); - runtime->dma_bytes = params_buffer_bytes(params); - - if (prtd->dma_data) - return 0; - prtd->dma_data = dma_data; - err = omap_request_dma(dma_data->dma_req, dma_data->name, - omap_pcm_dma_irq, substream, &prtd->dma_ch); - if (!err) { - /* - * Link channel with itself so DMA doesn't need any - * reprogramming while looping the buffer - */ - omap_dma_link_lch(prtd->dma_ch, prtd->dma_ch); - } - - return err; -} - -static int omap_pcm_hw_free(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct omap_runtime_data *prtd = runtime->private_data; - - if (prtd->dma_data == NULL) - return 0; - - omap_dma_unlink_lch(prtd->dma_ch, prtd->dma_ch); - omap_free_dma(prtd->dma_ch); - prtd->dma_data = NULL; - - snd_pcm_set_runtime_buffer(substream, NULL); - - return 0; -} - -static int omap_pcm_prepare(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct omap_runtime_data *prtd = runtime->private_data; - struct omap_pcm_dma_data *dma_data = prtd->dma_data; - struct omap_dma_channel_params dma_params; - int bytes; - - /* return if this is a bufferless transfer e.g. - * codec <--> BT codec or GSM modem -- lg FIXME */ - if (!prtd->dma_data) - return 0; - - memset(&dma_params, 0, sizeof(dma_params)); - dma_params.data_type = dma_data->data_type; - dma_params.trigger = dma_data->dma_req; - dma_params.sync_mode = dma_data->sync_mode; - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - dma_params.src_amode = OMAP_DMA_AMODE_POST_INC; - dma_params.dst_amode = OMAP_DMA_AMODE_CONSTANT; - dma_params.src_or_dst_synch = OMAP_DMA_DST_SYNC; - dma_params.src_start = runtime->dma_addr; - dma_params.dst_start = dma_data->port_addr; - dma_params.dst_port = OMAP_DMA_PORT_MPUI; - dma_params.dst_fi = dma_data->packet_size; - } else { - dma_params.src_amode = OMAP_DMA_AMODE_CONSTANT; - dma_params.dst_amode = OMAP_DMA_AMODE_POST_INC; - dma_params.src_or_dst_synch = OMAP_DMA_SRC_SYNC; - dma_params.src_start = dma_data->port_addr; - dma_params.dst_start = runtime->dma_addr; - dma_params.src_port = OMAP_DMA_PORT_MPUI; - dma_params.src_fi = dma_data->packet_size; - } - /* - * Set DMA transfer frame size equal to ALSA period size and frame - * count as no. of ALSA periods. Then with DMA frame interrupt enabled, - * we can transfer the whole ALSA buffer with single DMA transfer but - * still can get an interrupt at each period bounary - */ - bytes = snd_pcm_lib_period_bytes(substream); - dma_params.elem_count = bytes >> dma_data->data_type; - dma_params.frame_count = runtime->periods; - omap_set_dma_params(prtd->dma_ch, &dma_params); - - if ((cpu_is_omap1510())) - omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ | - OMAP_DMA_LAST_IRQ | OMAP_DMA_BLOCK_IRQ); - else if (!substream->runtime->no_period_wakeup) - omap_enable_dma_irq(prtd->dma_ch, OMAP_DMA_FRAME_IRQ); - else { - /* - * No period wakeup: - * we need to disable BLOCK_IRQ, which is enabled by the omap - * dma core at request dma time. - */ - omap_disable_dma_irq(prtd->dma_ch, OMAP_DMA_BLOCK_IRQ); - } - - if (!(cpu_class_is_omap1())) { - omap_set_dma_src_burst_mode(prtd->dma_ch, - OMAP_DMA_DATA_BURST_16); - omap_set_dma_dest_burst_mode(prtd->dma_ch, - OMAP_DMA_DATA_BURST_16); - } - - return 0; -} - -static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct omap_runtime_data *prtd = runtime->private_data; - struct omap_pcm_dma_data *dma_data = prtd->dma_data; - unsigned long flags; - int ret = 0; - - spin_lock_irqsave(&prtd->lock, flags); - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - prtd->period_index = 0; - /* Configure McBSP internal buffer usage */ - if (dma_data->set_threshold) - dma_data->set_threshold(substream); - - omap_start_dma(prtd->dma_ch); - break; - - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - prtd->period_index = -1; - omap_stop_dma(prtd->dma_ch); - break; - default: - ret = -EINVAL; - } - spin_unlock_irqrestore(&prtd->lock, flags); - - return ret; -} - -static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct omap_runtime_data *prtd = runtime->private_data; - dma_addr_t ptr; - snd_pcm_uframes_t offset; - - if (cpu_is_omap1510()) { - offset = prtd->period_index * runtime->period_size; - } else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { - ptr = omap_get_dma_dst_pos(prtd->dma_ch); - offset = bytes_to_frames(runtime, ptr - runtime->dma_addr); - } else { - ptr = omap_get_dma_src_pos(prtd->dma_ch); - offset = bytes_to_frames(runtime, ptr - runtime->dma_addr); - } - - if (offset >= runtime->buffer_size) - offset = 0; - - return offset; -} - -static int omap_pcm_open(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - struct omap_runtime_data *prtd; - int ret; - - snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware); - - /* 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) - goto out; - - prtd = kzalloc(sizeof(*prtd), GFP_KERNEL); - if (prtd == NULL) { - ret = -ENOMEM; - goto out; - } - spin_lock_init(&prtd->lock); - runtime->private_data = prtd; - -out: - return ret; -} - -static int omap_pcm_close(struct snd_pcm_substream *substream) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - - kfree(runtime->private_data); - return 0; -} - -static int omap_pcm_mmap(struct snd_pcm_substream *substream, - struct vm_area_struct *vma) -{ - struct snd_pcm_runtime *runtime = substream->runtime; - - return dma_mmap_writecombine(substream->pcm->card->dev, vma, - runtime->dma_area, - runtime->dma_addr, - runtime->dma_bytes); -} - -static struct snd_pcm_ops omap_pcm_ops = { - .open = omap_pcm_open, - .close = omap_pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = omap_pcm_hw_params, - .hw_free = omap_pcm_hw_free, - .prepare = omap_pcm_prepare, - .trigger = omap_pcm_trigger, - .pointer = omap_pcm_pointer, - .mmap = omap_pcm_mmap, -}; - -static u64 omap_pcm_dmamask = DMA_BIT_MASK(64); - -static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, - int stream) -{ - struct snd_pcm_substream *substream = pcm->streams[stream].substream; - struct snd_dma_buffer *buf = &substream->dma_buffer; - size_t size = omap_pcm_hardware.buffer_bytes_max; - - buf->dev.type = SNDRV_DMA_TYPE_DEV; - buf->dev.dev = pcm->card->dev; - buf->private_data = NULL; - buf->area = dma_alloc_writecombine(pcm->card->dev, size, - &buf->addr, GFP_KERNEL); - if (!buf->area) - return -ENOMEM; - - buf->bytes = size; - return 0; -} - -static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm) -{ - struct snd_pcm_substream *substream; - struct snd_dma_buffer *buf; - int stream; - - for (stream = 0; stream < 2; stream++) { - substream = pcm->streams[stream].substream; - if (!substream) - continue; - - buf = &substream->dma_buffer; - if (!buf->area) - continue; - - dma_free_writecombine(pcm->card->dev, buf->bytes, - buf->area, buf->addr); - buf->area = NULL; - } -} - -static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd) -{ - struct snd_card *card = rtd->card->snd_card; - struct snd_pcm *pcm = rtd->pcm; - int ret = 0; - - if (!card->dev->dma_mask) - card->dev->dma_mask = &omap_pcm_dmamask; - if (!card->dev->coherent_dma_mask) - card->dev->coherent_dma_mask = DMA_BIT_MASK(64); - - if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { - ret = omap_pcm_preallocate_dma_buffer(pcm, - SNDRV_PCM_STREAM_PLAYBACK); - if (ret) - goto out; - } - - if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { - ret = omap_pcm_preallocate_dma_buffer(pcm, - SNDRV_PCM_STREAM_CAPTURE); - if (ret) - goto out; - } - -out: - /* free preallocated buffers in case of error */ - if (ret) - omap_pcm_free_dma_buffers(pcm); - - return ret; -} - -static struct snd_soc_platform_driver omap_soc_platform = { - .ops = &omap_pcm_ops, - .pcm_new = omap_pcm_new, - .pcm_free = omap_pcm_free_dma_buffers, -}; - -static __devinit int omap_pcm_probe(struct platform_device *pdev) -{ - return snd_soc_register_platform(&pdev->dev, - &omap_soc_platform); -} - -static int __devexit omap_pcm_remove(struct platform_device *pdev) -{ - snd_soc_unregister_platform(&pdev->dev); - return 0; -} - -static struct platform_driver omap_pcm_driver = { - .driver = { - .name = "omap-pcm-audio", - .owner = THIS_MODULE, - }, - - .probe = omap_pcm_probe, - .remove = __devexit_p(omap_pcm_remove), -}; - -module_platform_driver(omap_pcm_driver); - -MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>"); -MODULE_DESCRIPTION("OMAP PCM DMA module"); -MODULE_LICENSE("GPL"); |