[alsa-devel] [PATCHv2 3/5] ASoC: Intel: Add Intel SST audio DSP Firmware loader.

[Takashi Iwai]

At Mon, 17 Feb 2014 13:32:08 +0000,
Liam Girdwood wrote:
> 
> Provide services for Intel SST drivers to load SST modular firmware.
> 
> SST Firmware can be made up of several modules. These modules can exist
> within any of the compatible SST memory blocks. Provide a generic memory
> block and firmware module manager that can be used with any SST firmware
> and core.
> 
> Signed-off-by: Liam Girdwood <liam.r.girdwood at linux.intel.com>
> ---
>  sound/soc/intel/sst-firmware.c | 586 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 586 insertions(+)
>  create mode 100644 sound/soc/intel/sst-firmware.c
> 
> diff --git a/sound/soc/intel/sst-firmware.c b/sound/soc/intel/sst-firmware.c
> new file mode 100644
> index 0000000..b6f9b5e
> --- /dev/null
> +++ b/sound/soc/intel/sst-firmware.c
> @@ -0,0 +1,586 @@
> +/*
> + * Intel SST Firmware Loader
> + *
> + * Copyright (C) 2013, Intel Corporation. All rights reserved.
> + *
> + * 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.
> + *
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/sched.h>
> +#include <linux/firmware.h>
> +#include <linux/export.h>
> +#include <linux/platform_device.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/dmaengine.h>
> +#include <linux/pci.h>
> +
> +#include <asm/page.h>
> +#include <asm/pgtable.h>
> +
> +#include "sst-dsp.h"
> +#include "sst-dsp-priv.h"
> +
> +static void sst_memcpy32(void *dest, void *src, u32 bytes)
> +{
> +	u32 i;
> +
> +	/* copy one 32 bit word at a time as 64 bit access is not supported */
> +	for (i = 0; i < bytes; i += 4)
> +		memcpy_toio(dest + i, src + i, 4);
> +}
> +
> +/* create new generic firmware object */
> +struct sst_fw *sst_fw_new(struct sst_dsp *dsp, 
> +	const struct firmware *fw, void *private)
> +{
> +	struct sst_fw *sst_fw;
> +	int err;
> +
> +	if (!dsp->ops->parse_fw)
> +		return NULL;
> +
> +	sst_fw = kzalloc(sizeof(*sst_fw), GFP_KERNEL);
> +	if (sst_fw == NULL)
> +		return NULL;
> +
> +	sst_fw->dsp = dsp;
> +	sst_fw->private = private;
> +	sst_fw->size = fw->size;
> +
> +	err = dma_coerce_mask_and_coherent(dsp->dev, DMA_BIT_MASK(32));
> +	if (err < 0) {
> +		kfree(sst_fw);
> +		return NULL;
> +	}
> +
> +	/* allocate DMA buffer to store FW data */
> +	sst_fw->dma_buf = dma_alloc_coherent(dsp->dev, sst_fw->size,
> +				&sst_fw->dmable_fw_paddr, GFP_DMA);

Missing GFP_KERNEL?


Takashi