mirror of https://gitee.com/openkylin/linux.git
ASoC: davinci: Remove unused davinci-pcm platform driver
All DAI drivers has been converted to use edma-pcm instead of davinci-pcm and the driver can be removed from the tree. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi
Mark Brown
parent
9759e7ef53
commit
4da4608c91
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@ -1,11 +1,9 @@
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# DAVINCI Platform Support
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snd-soc-davinci-objs := davinci-pcm.o
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snd-soc-edma-objs := edma-pcm.o
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snd-soc-davinci-i2s-objs := davinci-i2s.o
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snd-soc-davinci-mcasp-objs:= davinci-mcasp.o
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snd-soc-davinci-vcif-objs:= davinci-vcif.o
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obj-$(CONFIG_SND_DAVINCI_SOC) += snd-soc-davinci.o
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obj-$(CONFIG_SND_EDMA_SOC) += snd-soc-edma.o
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obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o
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obj-$(CONFIG_SND_DAVINCI_SOC_MCASP) += snd-soc-davinci-mcasp.o
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@ -1,861 +0,0 @@
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/*
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* ALSA PCM interface for the TI DAVINCI processor
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*
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* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
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* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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* added SRAM ping/pong (C) 2008 Troy Kisky <troy.kisky@boundarydevices.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <linux/kernel.h>
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#include <linux/genalloc.h>
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#include <linux/platform_data/edma.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <asm/dma.h>
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#include "davinci-pcm.h"
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#ifdef DEBUG
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static void print_buf_info(int slot, char *name)
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{
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struct edmacc_param p;
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if (slot < 0)
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return;
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edma_read_slot(slot, &p);
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printk(KERN_DEBUG "%s: 0x%x, opt=%x, src=%x, a_b_cnt=%x dst=%x\n",
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name, slot, p.opt, p.src, p.a_b_cnt, p.dst);
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printk(KERN_DEBUG " src_dst_bidx=%x link_bcntrld=%x src_dst_cidx=%x ccnt=%x\n",
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p.src_dst_bidx, p.link_bcntrld, p.src_dst_cidx, p.ccnt);
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}
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#else
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static void print_buf_info(int slot, char *name)
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{
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}
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#endif
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static struct snd_pcm_hardware pcm_hardware_playback = {
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.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME|
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SNDRV_PCM_INFO_BATCH),
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.buffer_bytes_max = 128 * 1024,
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.period_bytes_min = 32,
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.period_bytes_max = 8 * 1024,
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.periods_min = 16,
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.periods_max = 255,
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.fifo_size = 0,
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};
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static struct snd_pcm_hardware pcm_hardware_capture = {
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.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_BATCH),
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.buffer_bytes_max = 128 * 1024,
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.period_bytes_min = 32,
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.period_bytes_max = 8 * 1024,
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.periods_min = 16,
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.periods_max = 255,
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.fifo_size = 0,
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};
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/*
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* How ping/pong works....
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*
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* Playback:
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* ram_params - copys 2*ping_size from start of SDRAM to iram,
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* links to ram_link2
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* ram_link2 - copys rest of SDRAM to iram in ping_size units,
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* links to ram_link
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* ram_link - copys entire SDRAM to iram in ping_size uints,
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* links to self
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*
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* asp_params - same as asp_link[0]
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* asp_link[0] - copys from lower half of iram to asp port
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* links to asp_link[1], triggers iram copy event on completion
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* asp_link[1] - copys from upper half of iram to asp port
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* links to asp_link[0], triggers iram copy event on completion
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* triggers interrupt only needed to let upper SOC levels update position
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* in stream on completion
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*
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* When playback is started:
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* ram_params started
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* asp_params started
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*
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* Capture:
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* ram_params - same as ram_link,
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* links to ram_link
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* ram_link - same as playback
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* links to self
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*
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* asp_params - same as playback
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* asp_link[0] - same as playback
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* asp_link[1] - same as playback
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*
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* When capture is started:
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* asp_params started
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*/
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struct davinci_runtime_data {
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spinlock_t lock;
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int period; /* current DMA period */
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int asp_channel; /* Master DMA channel */
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int asp_link[2]; /* asp parameter link channel, ping/pong */
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struct davinci_pcm_dma_params *params; /* DMA params */
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int ram_channel;
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int ram_link;
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int ram_link2;
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struct edmacc_param asp_params;
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struct edmacc_param ram_params;
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};
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static void davinci_pcm_period_elapsed(struct snd_pcm_substream *substream)
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{
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struct davinci_runtime_data *prtd = substream->runtime->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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prtd->period++;
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if (unlikely(prtd->period >= runtime->periods))
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prtd->period = 0;
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}
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static void davinci_pcm_period_reset(struct snd_pcm_substream *substream)
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{
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struct davinci_runtime_data *prtd = substream->runtime->private_data;
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prtd->period = 0;
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}
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/*
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* Not used with ping/pong
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*/
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static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
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{
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struct davinci_runtime_data *prtd = substream->runtime->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned int period_size;
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unsigned int dma_offset;
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dma_addr_t dma_pos;
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dma_addr_t src, dst;
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unsigned short src_bidx, dst_bidx;
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unsigned short src_cidx, dst_cidx;
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unsigned int data_type;
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unsigned short acnt;
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unsigned int count;
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unsigned int fifo_level;
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period_size = snd_pcm_lib_period_bytes(substream);
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dma_offset = prtd->period * period_size;
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dma_pos = runtime->dma_addr + dma_offset;
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fifo_level = prtd->params->fifo_level;
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pr_debug("davinci_pcm: audio_set_dma_params_play channel = %d "
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"dma_ptr = %x period_size=%x\n", prtd->asp_link[0], dma_pos,
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period_size);
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data_type = prtd->params->data_type;
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count = period_size / data_type;
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if (fifo_level)
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count /= fifo_level;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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src = dma_pos;
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dst = prtd->params->dma_addr;
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src_bidx = data_type;
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dst_bidx = 4;
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src_cidx = data_type * fifo_level;
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dst_cidx = 0;
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} else {
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src = prtd->params->dma_addr;
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dst = dma_pos;
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src_bidx = 0;
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dst_bidx = data_type;
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src_cidx = 0;
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dst_cidx = data_type * fifo_level;
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}
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acnt = prtd->params->acnt;
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edma_set_src(prtd->asp_link[0], src, INCR, W8BIT);
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edma_set_dest(prtd->asp_link[0], dst, INCR, W8BIT);
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edma_set_src_index(prtd->asp_link[0], src_bidx, src_cidx);
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edma_set_dest_index(prtd->asp_link[0], dst_bidx, dst_cidx);
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if (!fifo_level)
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edma_set_transfer_params(prtd->asp_link[0], acnt, count, 1, 0,
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ASYNC);
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else
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edma_set_transfer_params(prtd->asp_link[0], acnt,
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fifo_level,
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count, fifo_level,
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ABSYNC);
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}
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static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data)
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{
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struct snd_pcm_substream *substream = data;
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struct davinci_runtime_data *prtd = substream->runtime->private_data;
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print_buf_info(prtd->ram_channel, "i ram_channel");
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pr_debug("davinci_pcm: link=%d, status=0x%x\n", link, ch_status);
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if (unlikely(ch_status != EDMA_DMA_COMPLETE))
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return;
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if (snd_pcm_running(substream)) {
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spin_lock(&prtd->lock);
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if (prtd->ram_channel < 0) {
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/* No ping/pong must fix up link dma data*/
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davinci_pcm_enqueue_dma(substream);
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}
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davinci_pcm_period_elapsed(substream);
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spin_unlock(&prtd->lock);
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snd_pcm_period_elapsed(substream);
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}
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}
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#ifdef CONFIG_GENERIC_ALLOCATOR
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static int allocate_sram(struct snd_pcm_substream *substream,
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struct gen_pool *sram_pool, unsigned size,
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struct snd_pcm_hardware *ppcm)
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{
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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struct snd_dma_buffer *iram_dma = NULL;
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dma_addr_t iram_phys = 0;
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void *iram_virt = NULL;
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if (buf->private_data || !size)
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return 0;
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ppcm->period_bytes_max = size;
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iram_virt = gen_pool_dma_alloc(sram_pool, size, &iram_phys);
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if (!iram_virt)
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goto exit1;
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iram_dma = kzalloc(sizeof(*iram_dma), GFP_KERNEL);
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if (!iram_dma)
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goto exit2;
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iram_dma->area = iram_virt;
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iram_dma->addr = iram_phys;
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memset(iram_dma->area, 0, size);
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iram_dma->bytes = size;
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buf->private_data = iram_dma;
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return 0;
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exit2:
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if (iram_virt)
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gen_pool_free(sram_pool, (unsigned)iram_virt, size);
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exit1:
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return -ENOMEM;
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}
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static void davinci_free_sram(struct snd_pcm_substream *substream,
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struct snd_dma_buffer *iram_dma)
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{
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struct davinci_runtime_data *prtd = substream->runtime->private_data;
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struct gen_pool *sram_pool = prtd->params->sram_pool;
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gen_pool_free(sram_pool, (unsigned) iram_dma->area, iram_dma->bytes);
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}
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#else
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static int allocate_sram(struct snd_pcm_substream *substream,
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struct gen_pool *sram_pool, unsigned size,
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struct snd_pcm_hardware *ppcm)
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{
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return 0;
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}
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static void davinci_free_sram(struct snd_pcm_substream *substream,
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struct snd_dma_buffer *iram_dma)
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{
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}
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#endif
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/*
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* Only used with ping/pong.
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* This is called after runtime->dma_addr, period_bytes and data_type are valid
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*/
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static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
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{
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unsigned short ram_src_cidx, ram_dst_cidx;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct davinci_runtime_data *prtd = runtime->private_data;
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struct snd_dma_buffer *iram_dma =
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(struct snd_dma_buffer *)substream->dma_buffer.private_data;
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struct davinci_pcm_dma_params *params = prtd->params;
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unsigned int data_type = params->data_type;
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unsigned int acnt = params->acnt;
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/* divide by 2 for ping/pong */
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unsigned int ping_size = snd_pcm_lib_period_bytes(substream) >> 1;
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unsigned int fifo_level = prtd->params->fifo_level;
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unsigned int count;
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if ((data_type == 0) || (data_type > 4)) {
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printk(KERN_ERR "%s: data_type=%i\n", __func__, data_type);
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return -EINVAL;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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dma_addr_t asp_src_pong = iram_dma->addr + ping_size;
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ram_src_cidx = ping_size;
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ram_dst_cidx = -ping_size;
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edma_set_src(prtd->asp_link[1], asp_src_pong, INCR, W8BIT);
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edma_set_src_index(prtd->asp_link[0], data_type,
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data_type * fifo_level);
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edma_set_src_index(prtd->asp_link[1], data_type,
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data_type * fifo_level);
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edma_set_src(prtd->ram_link, runtime->dma_addr, INCR, W32BIT);
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} else {
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dma_addr_t asp_dst_pong = iram_dma->addr + ping_size;
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ram_src_cidx = -ping_size;
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ram_dst_cidx = ping_size;
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edma_set_dest(prtd->asp_link[1], asp_dst_pong, INCR, W8BIT);
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edma_set_dest_index(prtd->asp_link[0], data_type,
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data_type * fifo_level);
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edma_set_dest_index(prtd->asp_link[1], data_type,
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data_type * fifo_level);
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edma_set_dest(prtd->ram_link, runtime->dma_addr, INCR, W32BIT);
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}
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if (!fifo_level) {
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count = ping_size / data_type;
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edma_set_transfer_params(prtd->asp_link[0], acnt, count,
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1, 0, ASYNC);
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edma_set_transfer_params(prtd->asp_link[1], acnt, count,
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1, 0, ASYNC);
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} else {
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count = ping_size / (data_type * fifo_level);
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edma_set_transfer_params(prtd->asp_link[0], acnt, fifo_level,
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count, fifo_level, ABSYNC);
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edma_set_transfer_params(prtd->asp_link[1], acnt, fifo_level,
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count, fifo_level, ABSYNC);
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}
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edma_set_src_index(prtd->ram_link, ping_size, ram_src_cidx);
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edma_set_dest_index(prtd->ram_link, ping_size, ram_dst_cidx);
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edma_set_transfer_params(prtd->ram_link, ping_size, 2,
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runtime->periods, 2, ASYNC);
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/* init master params */
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edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
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edma_read_slot(prtd->ram_link, &prtd->ram_params);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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struct edmacc_param p_ram;
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/* Copy entire iram buffer before playback started */
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prtd->ram_params.a_b_cnt = (1 << 16) | (ping_size << 1);
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/* 0 dst_bidx */
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prtd->ram_params.src_dst_bidx = (ping_size << 1);
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/* 0 dst_cidx */
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prtd->ram_params.src_dst_cidx = (ping_size << 1);
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prtd->ram_params.ccnt = 1;
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/* Skip 1st period */
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edma_read_slot(prtd->ram_link, &p_ram);
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p_ram.src += (ping_size << 1);
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p_ram.ccnt -= 1;
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edma_write_slot(prtd->ram_link2, &p_ram);
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/*
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* When 1st started, ram -> iram dma channel will fill the
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* entire iram. Then, whenever a ping/pong asp buffer finishes,
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* 1/2 iram will be filled.
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*/
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prtd->ram_params.link_bcntrld =
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EDMA_CHAN_SLOT(prtd->ram_link2) << 5;
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}
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return 0;
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}
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/* 1 asp tx or rx channel using 2 parameter channels
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* 1 ram to/from iram channel using 1 parameter channel
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*
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* Playback
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* ram copy channel kicks off first,
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* 1st ram copy of entire iram buffer completion kicks off asp channel
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* asp tcc always kicks off ram copy of 1/2 iram buffer
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*
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* Record
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* asp channel starts, tcc kicks off ram copy
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*/
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static int request_ping_pong(struct snd_pcm_substream *substream,
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struct davinci_runtime_data *prtd,
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struct snd_dma_buffer *iram_dma)
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{
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dma_addr_t asp_src_ping;
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dma_addr_t asp_dst_ping;
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int ret;
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struct davinci_pcm_dma_params *params = prtd->params;
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/* Request ram master channel */
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ret = prtd->ram_channel = edma_alloc_channel(EDMA_CHANNEL_ANY,
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davinci_pcm_dma_irq, substream,
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prtd->params->ram_chan_q);
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if (ret < 0)
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goto exit1;
|
||||
|
||||
/* Request ram link channel */
|
||||
ret = prtd->ram_link = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY);
|
||||
if (ret < 0)
|
||||
goto exit2;
|
||||
|
||||
ret = prtd->asp_link[1] = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
|
||||
if (ret < 0)
|
||||
goto exit3;
|
||||
|
||||
prtd->ram_link2 = -1;
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
ret = prtd->ram_link2 = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->ram_channel), EDMA_SLOT_ANY);
|
||||
if (ret < 0)
|
||||
goto exit4;
|
||||
}
|
||||
/* circle ping-pong buffers */
|
||||
edma_link(prtd->asp_link[0], prtd->asp_link[1]);
|
||||
edma_link(prtd->asp_link[1], prtd->asp_link[0]);
|
||||
/* circle ram buffers */
|
||||
edma_link(prtd->ram_link, prtd->ram_link);
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
asp_src_ping = iram_dma->addr;
|
||||
asp_dst_ping = params->dma_addr; /* fifo */
|
||||
} else {
|
||||
asp_src_ping = params->dma_addr; /* fifo */
|
||||
asp_dst_ping = iram_dma->addr;
|
||||
}
|
||||
/* ping */
|
||||
edma_set_src(prtd->asp_link[0], asp_src_ping, INCR, W16BIT);
|
||||
edma_set_dest(prtd->asp_link[0], asp_dst_ping, INCR, W16BIT);
|
||||
edma_set_src_index(prtd->asp_link[0], 0, 0);
|
||||
edma_set_dest_index(prtd->asp_link[0], 0, 0);
|
||||
|
||||
edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f) | TCINTEN);
|
||||
prtd->asp_params.opt |= TCCHEN |
|
||||
EDMA_TCC(prtd->ram_channel & 0x3f);
|
||||
edma_write_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
|
||||
/* pong */
|
||||
edma_set_src(prtd->asp_link[1], asp_src_ping, INCR, W16BIT);
|
||||
edma_set_dest(prtd->asp_link[1], asp_dst_ping, INCR, W16BIT);
|
||||
edma_set_src_index(prtd->asp_link[1], 0, 0);
|
||||
edma_set_dest_index(prtd->asp_link[1], 0, 0);
|
||||
|
||||
edma_read_slot(prtd->asp_link[1], &prtd->asp_params);
|
||||
prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f));
|
||||
/* interrupt after every pong completion */
|
||||
prtd->asp_params.opt |= TCINTEN | TCCHEN |
|
||||
EDMA_TCC(prtd->ram_channel & 0x3f);
|
||||
edma_write_slot(prtd->asp_link[1], &prtd->asp_params);
|
||||
|
||||
/* ram */
|
||||
edma_set_src(prtd->ram_link, iram_dma->addr, INCR, W32BIT);
|
||||
edma_set_dest(prtd->ram_link, iram_dma->addr, INCR, W32BIT);
|
||||
pr_debug("%s: audio dma channels/slots in use for ram:%u %u %u,"
|
||||
"for asp:%u %u %u\n", __func__,
|
||||
prtd->ram_channel, prtd->ram_link, prtd->ram_link2,
|
||||
prtd->asp_channel, prtd->asp_link[0],
|
||||
prtd->asp_link[1]);
|
||||
return 0;
|
||||
exit4:
|
||||
edma_free_channel(prtd->asp_link[1]);
|
||||
prtd->asp_link[1] = -1;
|
||||
exit3:
|
||||
edma_free_channel(prtd->ram_link);
|
||||
prtd->ram_link = -1;
|
||||
exit2:
|
||||
edma_free_channel(prtd->ram_channel);
|
||||
prtd->ram_channel = -1;
|
||||
exit1:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_dma_buffer *iram_dma;
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
struct davinci_pcm_dma_params *params = prtd->params;
|
||||
int ret;
|
||||
|
||||
if (!params)
|
||||
return -ENODEV;
|
||||
|
||||
/* Request asp master DMA channel */
|
||||
ret = prtd->asp_channel = edma_alloc_channel(params->channel,
|
||||
davinci_pcm_dma_irq, substream,
|
||||
prtd->params->asp_chan_q);
|
||||
if (ret < 0)
|
||||
goto exit1;
|
||||
|
||||
/* Request asp link channels */
|
||||
ret = prtd->asp_link[0] = edma_alloc_slot(
|
||||
EDMA_CTLR(prtd->asp_channel), EDMA_SLOT_ANY);
|
||||
if (ret < 0)
|
||||
goto exit2;
|
||||
|
||||
iram_dma = (struct snd_dma_buffer *)substream->dma_buffer.private_data;
|
||||
if (iram_dma) {
|
||||
if (request_ping_pong(substream, prtd, iram_dma) == 0)
|
||||
return 0;
|
||||
printk(KERN_WARNING "%s: dma channel allocation failed,"
|
||||
"not using sram\n", __func__);
|
||||
}
|
||||
|
||||
/* Issue transfer completion IRQ when the channel completes a
|
||||
* transfer, then always reload from the same slot (by a kind
|
||||
* of loopback link). The completion IRQ handler will update
|
||||
* the reload slot with a new buffer.
|
||||
*
|
||||
* REVISIT save p_ram here after setting up everything except
|
||||
* the buffer and its length (ccnt) ... use it as a template
|
||||
* so davinci_pcm_enqueue_dma() takes less time in IRQ.
|
||||
*/
|
||||
edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
prtd->asp_params.opt |= TCINTEN |
|
||||
EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_channel));
|
||||
prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(prtd->asp_link[0]) << 5;
|
||||
edma_write_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
return 0;
|
||||
exit2:
|
||||
edma_free_channel(prtd->asp_channel);
|
||||
prtd->asp_channel = -1;
|
||||
exit1:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
int ret = 0;
|
||||
|
||||
spin_lock(&prtd->lock);
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
edma_start(prtd->asp_channel);
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
||||
prtd->ram_channel >= 0) {
|
||||
/* copy 1st iram buffer */
|
||||
edma_start(prtd->ram_channel);
|
||||
}
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
edma_resume(prtd->asp_channel);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
edma_pause(prtd->asp_channel);
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
spin_unlock(&prtd->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
|
||||
davinci_pcm_period_reset(substream);
|
||||
if (prtd->ram_channel >= 0) {
|
||||
int ret = ping_pong_dma_setup(substream);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
edma_write_slot(prtd->ram_channel, &prtd->ram_params);
|
||||
edma_write_slot(prtd->asp_channel, &prtd->asp_params);
|
||||
|
||||
print_buf_info(prtd->ram_channel, "ram_channel");
|
||||
print_buf_info(prtd->ram_link, "ram_link");
|
||||
print_buf_info(prtd->ram_link2, "ram_link2");
|
||||
print_buf_info(prtd->asp_channel, "asp_channel");
|
||||
print_buf_info(prtd->asp_link[0], "asp_link[0]");
|
||||
print_buf_info(prtd->asp_link[1], "asp_link[1]");
|
||||
|
||||
/*
|
||||
* There is a phase offset of 2 periods between the position
|
||||
* used by dma setup and the position reported in the pointer
|
||||
* function.
|
||||
*
|
||||
* The phase offset, when not using ping-pong buffers, is due to
|
||||
* the two consecutive calls to davinci_pcm_enqueue_dma() below.
|
||||
*
|
||||
* Whereas here, with ping-pong buffers, the phase is due to
|
||||
* there being an entire buffer transfer complete before the
|
||||
* first dma completion event triggers davinci_pcm_dma_irq().
|
||||
*/
|
||||
davinci_pcm_period_elapsed(substream);
|
||||
davinci_pcm_period_elapsed(substream);
|
||||
|
||||
return 0;
|
||||
}
|
||||
davinci_pcm_enqueue_dma(substream);
|
||||
davinci_pcm_period_elapsed(substream);
|
||||
|
||||
/* Copy self-linked parameter RAM entry into master channel */
|
||||
edma_read_slot(prtd->asp_link[0], &prtd->asp_params);
|
||||
edma_write_slot(prtd->asp_channel, &prtd->asp_params);
|
||||
davinci_pcm_enqueue_dma(substream);
|
||||
davinci_pcm_period_elapsed(substream);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t
|
||||
davinci_pcm_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct davinci_runtime_data *prtd = runtime->private_data;
|
||||
unsigned int offset;
|
||||
int asp_count;
|
||||
unsigned int period_size = snd_pcm_lib_period_bytes(substream);
|
||||
|
||||
/*
|
||||
* There is a phase offset of 2 periods between the position used by dma
|
||||
* setup and the position reported in the pointer function. Either +2 in
|
||||
* the dma setup or -2 here in the pointer function (with wrapping,
|
||||
* both) accounts for this offset -- choose the latter since it makes
|
||||
* the first-time setup clearer.
|
||||
*/
|
||||
spin_lock(&prtd->lock);
|
||||
asp_count = prtd->period - 2;
|
||||
spin_unlock(&prtd->lock);
|
||||
|
||||
if (asp_count < 0)
|
||||
asp_count += runtime->periods;
|
||||
asp_count *= period_size;
|
||||
|
||||
offset = bytes_to_frames(runtime, asp_count);
|
||||
if (offset >= runtime->buffer_size)
|
||||
offset = 0;
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
static int davinci_pcm_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct davinci_runtime_data *prtd;
|
||||
struct snd_pcm_hardware *ppcm;
|
||||
int ret = 0;
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
struct davinci_pcm_dma_params *pa;
|
||||
struct davinci_pcm_dma_params *params;
|
||||
|
||||
pa = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
||||
if (!pa)
|
||||
return -ENODEV;
|
||||
params = &pa[substream->stream];
|
||||
|
||||
ppcm = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
||||
&pcm_hardware_playback : &pcm_hardware_capture;
|
||||
allocate_sram(substream, params->sram_pool, params->sram_size, ppcm);
|
||||
snd_soc_set_runtime_hwparams(substream, ppcm);
|
||||
/* 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)
|
||||
return ret;
|
||||
|
||||
prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL);
|
||||
if (prtd == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
spin_lock_init(&prtd->lock);
|
||||
prtd->params = params;
|
||||
prtd->asp_channel = -1;
|
||||
prtd->asp_link[0] = prtd->asp_link[1] = -1;
|
||||
prtd->ram_channel = -1;
|
||||
prtd->ram_link = -1;
|
||||
prtd->ram_link2 = -1;
|
||||
|
||||
runtime->private_data = prtd;
|
||||
|
||||
ret = davinci_pcm_dma_request(substream);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "davinci_pcm: Failed to get dma channels\n");
|
||||
kfree(prtd);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct davinci_runtime_data *prtd = runtime->private_data;
|
||||
|
||||
if (prtd->ram_channel >= 0)
|
||||
edma_stop(prtd->ram_channel);
|
||||
if (prtd->asp_channel >= 0)
|
||||
edma_stop(prtd->asp_channel);
|
||||
if (prtd->asp_link[0] >= 0)
|
||||
edma_unlink(prtd->asp_link[0]);
|
||||
if (prtd->asp_link[1] >= 0)
|
||||
edma_unlink(prtd->asp_link[1]);
|
||||
if (prtd->ram_link >= 0)
|
||||
edma_unlink(prtd->ram_link);
|
||||
|
||||
if (prtd->asp_link[0] >= 0)
|
||||
edma_free_slot(prtd->asp_link[0]);
|
||||
if (prtd->asp_link[1] >= 0)
|
||||
edma_free_slot(prtd->asp_link[1]);
|
||||
if (prtd->asp_channel >= 0)
|
||||
edma_free_channel(prtd->asp_channel);
|
||||
if (prtd->ram_link >= 0)
|
||||
edma_free_slot(prtd->ram_link);
|
||||
if (prtd->ram_link2 >= 0)
|
||||
edma_free_slot(prtd->ram_link2);
|
||||
if (prtd->ram_channel >= 0)
|
||||
edma_free_channel(prtd->ram_channel);
|
||||
|
||||
kfree(prtd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int davinci_pcm_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *hw_params)
|
||||
{
|
||||
return snd_pcm_lib_malloc_pages(substream,
|
||||
params_buffer_bytes(hw_params));
|
||||
}
|
||||
|
||||
static int davinci_pcm_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
return snd_pcm_lib_free_pages(substream);
|
||||
}
|
||||
|
||||
static int davinci_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 davinci_pcm_ops = {
|
||||
.open = davinci_pcm_open,
|
||||
.close = davinci_pcm_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = davinci_pcm_hw_params,
|
||||
.hw_free = davinci_pcm_hw_free,
|
||||
.prepare = davinci_pcm_prepare,
|
||||
.trigger = davinci_pcm_trigger,
|
||||
.pointer = davinci_pcm_pointer,
|
||||
.mmap = davinci_pcm_mmap,
|
||||
};
|
||||
|
||||
static int davinci_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream,
|
||||
size_t size)
|
||||
{
|
||||
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
|
||||
struct snd_dma_buffer *buf = &substream->dma_buffer;
|
||||
|
||||
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);
|
||||
|
||||
pr_debug("davinci_pcm: preallocate_dma_buffer: area=%p, addr=%p, "
|
||||
"size=%d\n", (void *) buf->area, (void *) buf->addr, size);
|
||||
|
||||
if (!buf->area)
|
||||
return -ENOMEM;
|
||||
|
||||
buf->bytes = size;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void davinci_pcm_free(struct snd_pcm *pcm)
|
||||
{
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_dma_buffer *buf;
|
||||
int stream;
|
||||
|
||||
for (stream = 0; stream < 2; stream++) {
|
||||
struct snd_dma_buffer *iram_dma;
|
||||
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;
|
||||
iram_dma = buf->private_data;
|
||||
if (iram_dma) {
|
||||
davinci_free_sram(substream, iram_dma);
|
||||
kfree(iram_dma);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int davinci_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
||||
{
|
||||
struct snd_card *card = rtd->card->snd_card;
|
||||
struct snd_pcm *pcm = rtd->pcm;
|
||||
int ret;
|
||||
|
||||
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
|
||||
ret = davinci_pcm_preallocate_dma_buffer(pcm,
|
||||
SNDRV_PCM_STREAM_PLAYBACK,
|
||||
pcm_hardware_playback.buffer_bytes_max);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
|
||||
ret = davinci_pcm_preallocate_dma_buffer(pcm,
|
||||
SNDRV_PCM_STREAM_CAPTURE,
|
||||
pcm_hardware_capture.buffer_bytes_max);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_soc_platform_driver davinci_soc_platform = {
|
||||
.ops = &davinci_pcm_ops,
|
||||
.pcm_new = davinci_pcm_new,
|
||||
.pcm_free = davinci_pcm_free,
|
||||
};
|
||||
|
||||
int davinci_soc_platform_register(struct device *dev)
|
||||
{
|
||||
return devm_snd_soc_register_platform(dev, &davinci_soc_platform);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(davinci_soc_platform_register);
|
||||
|
||||
MODULE_AUTHOR("Vladimir Barinov");
|
||||
MODULE_DESCRIPTION("TI DAVINCI PCM DMA module");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -1,41 +0,0 @@
|
|||
/*
|
||||
* ALSA PCM interface for the TI DAVINCI processor
|
||||
*
|
||||
* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
|
||||
* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.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.
|
||||
*/
|
||||
|
||||
#ifndef _DAVINCI_PCM_H
|
||||
#define _DAVINCI_PCM_H
|
||||
|
||||
#include <linux/genalloc.h>
|
||||
#include <linux/platform_data/davinci_asp.h>
|
||||
#include <linux/platform_data/edma.h>
|
||||
|
||||
struct davinci_pcm_dma_params {
|
||||
int channel; /* sync dma channel ID */
|
||||
unsigned short acnt;
|
||||
dma_addr_t dma_addr; /* device physical address for DMA */
|
||||
unsigned sram_size;
|
||||
struct gen_pool *sram_pool; /* SRAM gen_pool for ping pong */
|
||||
enum dma_event_q asp_chan_q; /* event queue number for ASP channel */
|
||||
enum dma_event_q ram_chan_q; /* event queue number for RAM channel */
|
||||
unsigned char data_type; /* xfer data type */
|
||||
unsigned char convert_mono_stereo;
|
||||
unsigned int fifo_level;
|
||||
};
|
||||
|
||||
#if IS_ENABLED(CONFIG_SND_DAVINCI_SOC)
|
||||
int davinci_soc_platform_register(struct device *dev);
|
||||
#else
|
||||
static inline int davinci_soc_platform_register(struct device *dev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_SND_DAVINCI_SOC */
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue