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Diffstat (limited to 'sound/soc/imx/imx-pcm-dma-mx2.c')
-rw-r--r--sound/soc/imx/imx-pcm-dma-mx2.c332
1 files changed, 0 insertions, 332 deletions
diff --git a/sound/soc/imx/imx-pcm-dma-mx2.c b/sound/soc/imx/imx-pcm-dma-mx2.c
deleted file mode 100644
index 05f19c9284f..00000000000
--- a/sound/soc/imx/imx-pcm-dma-mx2.c
+++ /dev/null
@@ -1,332 +0,0 @@
-/*
- * imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
- *
- * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
- *
- * This code is based on code copyrighted by Freescale,
- * Liam Girdwood, Javier Martin and probably others.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include <sound/core.h>
-#include <sound/initval.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include <mach/dma-mx1-mx2.h>
-
-#include "imx-ssi.h"
-
-struct imx_pcm_runtime_data {
- int sg_count;
- struct scatterlist *sg_list;
- int period;
- int periods;
- unsigned long dma_addr;
- int dma;
- struct snd_pcm_substream *substream;
- unsigned long offset;
- unsigned long size;
- unsigned long period_cnt;
- void *buf;
- int period_time;
-};
-
-/* Called by the DMA framework when a period has elapsed */
-static void imx_ssi_dma_progression(int channel, void *data,
- struct scatterlist *sg)
-{
- struct snd_pcm_substream *substream = data;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-
- if (!sg)
- return;
-
- runtime = iprtd->substream->runtime;
-
- iprtd->offset = sg->dma_address - runtime->dma_addr;
-
- snd_pcm_period_elapsed(iprtd->substream);
-}
-
-static void imx_ssi_dma_callback(int channel, void *data)
-{
- pr_err("%s shouldn't be called\n", __func__);
-}
-
-static void snd_imx_dma_err_callback(int channel, void *data, int err)
-{
- struct snd_pcm_substream *substream = data;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct imx_pcm_dma_params *dma_params =
- snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
- int ret;
-
- pr_err("DMA timeout on channel %d -%s%s%s%s\n",
- channel,
- err & IMX_DMA_ERR_BURST ? " burst" : "",
- err & IMX_DMA_ERR_REQUEST ? " request" : "",
- err & IMX_DMA_ERR_TRANSFER ? " transfer" : "",
- err & IMX_DMA_ERR_BUFFER ? " buffer" : "");
-
- imx_dma_disable(iprtd->dma);
- ret = imx_dma_setup_sg(iprtd->dma, iprtd->sg_list, iprtd->sg_count,
- IMX_DMA_LENGTH_LOOP, dma_params->dma_addr,
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
- DMA_MODE_WRITE : DMA_MODE_READ);
- if (!ret)
- imx_dma_enable(iprtd->dma);
-}
-
-static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct imx_pcm_dma_params *dma_params;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
- int ret;
-
- dma_params = snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);
-
- iprtd->dma = imx_dma_request_by_prio(DRV_NAME, DMA_PRIO_HIGH);
- if (iprtd->dma < 0) {
- pr_err("Failed to claim the audio DMA\n");
- return -ENODEV;
- }
-
- ret = imx_dma_setup_handlers(iprtd->dma,
- imx_ssi_dma_callback,
- snd_imx_dma_err_callback, substream);
- if (ret)
- goto out;
-
- ret = imx_dma_setup_progression_handler(iprtd->dma,
- imx_ssi_dma_progression);
- if (ret) {
- pr_err("Failed to setup the DMA handler\n");
- goto out;
- }
-
- ret = imx_dma_config_channel(iprtd->dma,
- IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
- IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
- dma_params->dma, 1);
- if (ret < 0) {
- pr_err("Cannot configure DMA channel: %d\n", ret);
- goto out;
- }
-
- imx_dma_config_burstlen(iprtd->dma, dma_params->burstsize * 2);
-
- return 0;
-out:
- imx_dma_free(iprtd->dma);
- return ret;
-}
-
-static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
- int i;
- unsigned long dma_addr;
-
- imx_ssi_dma_alloc(substream);
-
- iprtd->size = params_buffer_bytes(params);
- iprtd->periods = params_periods(params);
- iprtd->period = params_period_bytes(params);
- iprtd->offset = 0;
- iprtd->period_time = HZ / (params_rate(params) /
- params_period_size(params));
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-
- if (iprtd->sg_count != iprtd->periods) {
- kfree(iprtd->sg_list);
-
- iprtd->sg_list = kcalloc(iprtd->periods + 1,
- sizeof(struct scatterlist), GFP_KERNEL);
- if (!iprtd->sg_list)
- return -ENOMEM;
- iprtd->sg_count = iprtd->periods + 1;
- }
-
- sg_init_table(iprtd->sg_list, iprtd->sg_count);
- dma_addr = runtime->dma_addr;
-
- for (i = 0; i < iprtd->periods; i++) {
- iprtd->sg_list[i].page_link = 0;
- iprtd->sg_list[i].offset = 0;
- iprtd->sg_list[i].dma_address = dma_addr;
- iprtd->sg_list[i].length = iprtd->period;
- dma_addr += iprtd->period;
- }
-
- /* close the loop */
- iprtd->sg_list[iprtd->sg_count - 1].offset = 0;
- iprtd->sg_list[iprtd->sg_count - 1].length = 0;
- iprtd->sg_list[iprtd->sg_count - 1].page_link =
- ((unsigned long) iprtd->sg_list | 0x01) & ~0x02;
- return 0;
-}
-
-static int snd_imx_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-
- if (iprtd->dma >= 0) {
- imx_dma_free(iprtd->dma);
- iprtd->dma = -EINVAL;
- }
-
- kfree(iprtd->sg_list);
- iprtd->sg_list = NULL;
-
- return 0;
-}
-
-static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct imx_pcm_dma_params *dma_params;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
- int err;
-
- dma_params = snd_soc_dai_get_dma_data(rtd->dai->cpu_dai, substream);
-
- iprtd->substream = substream;
- iprtd->buf = (unsigned int *)substream->dma_buffer.area;
- iprtd->period_cnt = 0;
-
- pr_debug("%s: buf: %p period: %d periods: %d\n",
- __func__, iprtd->buf, iprtd->period, iprtd->periods);
-
- err = imx_dma_setup_sg(iprtd->dma, iprtd->sg_list, iprtd->sg_count,
- IMX_DMA_LENGTH_LOOP, dma_params->dma_addr,
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
- DMA_MODE_WRITE : DMA_MODE_READ);
- if (err)
- return err;
-
- return 0;
-}
-
-static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- imx_dma_enable(iprtd->dma);
-
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- imx_dma_disable(iprtd->dma);
-
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-
- return bytes_to_frames(substream->runtime, iprtd->offset);
-}
-
-static struct snd_pcm_hardware snd_imx_hardware = {
- .info = SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_PAUSE |
- SNDRV_PCM_INFO_RESUME,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .rate_min = 8000,
- .channels_min = 2,
- .channels_max = 2,
- .buffer_bytes_max = IMX_SSI_DMABUF_SIZE,
- .period_bytes_min = 128,
- .period_bytes_max = 16 * 1024,
- .periods_min = 2,
- .periods_max = 255,
- .fifo_size = 0,
-};
-
-static int snd_imx_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct imx_pcm_runtime_data *iprtd;
- int ret;
-
- iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
- runtime->private_data = iprtd;
-
- ret = snd_pcm_hw_constraint_integer(substream->runtime,
- SNDRV_PCM_HW_PARAM_PERIODS);
- if (ret < 0)
- return ret;
-
- snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
- return 0;
-}
-
-static struct snd_pcm_ops imx_pcm_ops = {
- .open = snd_imx_open,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_imx_pcm_hw_params,
- .hw_free = snd_imx_pcm_hw_free,
- .prepare = snd_imx_pcm_prepare,
- .trigger = snd_imx_pcm_trigger,
- .pointer = snd_imx_pcm_pointer,
- .mmap = snd_imx_pcm_mmap,
-};
-
-static struct snd_soc_platform imx_soc_platform_dma = {
- .name = "imx-audio",
- .pcm_ops = &imx_pcm_ops,
- .pcm_new = imx_pcm_new,
- .pcm_free = imx_pcm_free,
-};
-
-struct snd_soc_platform *imx_ssi_dma_mx2_init(struct platform_device *pdev,
- struct imx_ssi *ssi)
-{
- ssi->dma_params_tx.burstsize = DMA_TXFIFO_BURST;
- ssi->dma_params_rx.burstsize = DMA_RXFIFO_BURST;
-
- return &imx_soc_platform_dma;
-}
-
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