[alsa-devel] [PATCH v3 14/14] ASoC: SOF: Add utils

[Andy Shevchenko]

On Tue, Dec 11, 2018 at 03:23:18PM -0600, Pierre-Louis Bossart wrote:
> Helpers to set-up back-ends, create platform devices and common
> IO/block read/write operations

> +int sof_bes_setup(struct device *dev, struct snd_sof_dsp_ops *ops,
> +		  struct snd_soc_dai_link *links, int link_num,
> +		  struct snd_soc_card *card)
> +{
> +	char name[32];
> +	int i;
> +
> +	if (!ops || !links || !card)
> +		return -EINVAL;
> +
> +	/* set up BE dai_links */
> +	for (i = 0; i < link_num; i++) {

> +		snprintf(name, 32, "NoCodec-%d", i);

sizeof(name) ?

> +		links[i].name = devm_kstrdup(dev, name, GFP_KERNEL);
> +		if (!links[i].name)
> +			return -ENOMEM;

...or better devm_kasprintf().

> +
> +		links[i].id = i;
> +		links[i].no_pcm = 1;
> +		links[i].cpu_dai_name = ops->drv[i].name;
> +		links[i].platform_name = "sof-audio";
> +		links[i].codec_dai_name = "snd-soc-dummy-dai";
> +		links[i].codec_name = "snd-soc-dummy";
> +		links[i].dpcm_playback = 1;
> +		links[i].dpcm_capture = 1;
> +	}
> +
> +	card->dai_link = links;
> +	card->num_links = link_num;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(sof_bes_setup);
> +
> +/* register sof platform device */
> +int sof_create_platform_device(struct sof_platform_priv *priv)
> +{
> +	struct snd_sof_pdata *sof_pdata = priv->sof_pdata;
> +	struct device *dev = sof_pdata->dev;
> +
> +	priv->pdev_pcm =
> +		platform_device_register_data(dev, "sof-audio", -1,
> +					      sof_pdata, sizeof(*sof_pdata));
> +	if (IS_ERR(priv->pdev_pcm)) {
> +		dev_err(dev, "error: cannot register device sof-audio. Error %d\n",
> +			(int)PTR_ERR(priv->pdev_pcm));

Instead of casting perhaps use %ld?

> +		return PTR_ERR(priv->pdev_pcm);
> +	}
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(sof_create_platform_device);

> +void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value)
> +{
> +#ifdef CONFIG_64BIT
> +	writeq(value, addr);
> +#else
> +	memcpy_toio(addr, &value, sizeof(value));
> +#endif

This ifdef sounds strange.
Just include io64-nonatomic-lo-hi.h and use readq() w/o limitations.

> +}
> +EXPORT_SYMBOL(sof_io_write64);
> +
> +u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
> +{
> +#ifdef CONFIG_64BIT
> +	return readq(addr);
> +#else
> +	u64 val;
> +
> +	memcpy_fromio(&val, addr, sizeof(val));
> +	return val;
> +#endif

Ditto.

> +}
> +EXPORT_SYMBOL(sof_io_read64);

> +		affected_mask = (1 << (8 * n)) - 1;
> +
> +		/* first read the 32bit data of dest, then change affected
> +		 * bytes, and write back to dest. For unaffected bytes, it
> +		 * should not be changed
> +		 */

> +		__ioread32_copy(&tmp, dest + m * 4, 1);
> +		tmp &= ~affected_mask;
> +
> +		tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
> +		__iowrite32_copy(dest + m * 4, &tmp, 1);

Ain't these equivalents to simple ioread32() / iowrite32() ?

-- 
With Best Regards,
Andy Shevchenko