Helpers to set-up back-ends, create platform devices and common IO/block read/write operations
Signed-off-by: Keyon Jie yang.jie@linux.intel.com Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- sound/soc/sof/utils.c | 173 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 sound/soc/sof/utils.c
diff --git a/sound/soc/sof/utils.c b/sound/soc/sof/utils.c new file mode 100644 index 000000000000..bf66e14bc258 --- /dev/null +++ b/sound/soc/sof/utils.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) +// +// This file is provided under a dual BSD/GPLv2 license. When using or +// redistributing this file, you may do so under either license. +// +// Copyright(c) 2018 Intel Corporation. All rights reserved. +// +// Author: Keyon Jie yang.jie@linux.intel.com +// + +#include <linux/io.h> +#include <linux/platform_device.h> +#include <sound/soc.h> +#include <sound/sof.h> +#include "sof-priv.h" + +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); + links[i].name = devm_kstrdup(dev, name, GFP_KERNEL); + if (!links[i].name) + return -ENOMEM; + + 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)); + return PTR_ERR(priv->pdev_pcm); + } + + return 0; +} +EXPORT_SYMBOL(sof_create_platform_device); + +/* + * Register IO + */ + +void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value) +{ + writel(value, addr); +} +EXPORT_SYMBOL(sof_io_write); + +u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr) +{ + return readl(addr); +} +EXPORT_SYMBOL(sof_io_read); + +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 +} +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 +} +EXPORT_SYMBOL(sof_io_read64); + +/* + * IPC Mailbox IO + */ + +void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset, + void *message, size_t bytes) +{ + void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset; + + memcpy_toio(dest, message, bytes); +} +EXPORT_SYMBOL(sof_mailbox_write); + +void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset, + void *message, size_t bytes) +{ + void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset; + + memcpy_fromio(message, src, bytes); +} +EXPORT_SYMBOL(sof_mailbox_read); + +/* + * Memory copy. + */ + +void sof_block_write(struct snd_sof_dev *sdev, u32 offset, void *src, + size_t size) +{ + void __iomem *dest = sdev->bar[sdev->mmio_bar] + offset; + const u8 *src_byte = src; + u32 affected_mask; + u32 tmp = 0; + int m, n; + + m = size / 4; + n = size % 4; + + /* __iowrite32_copy use 32bit size values so divide by 4 */ + __iowrite32_copy(dest, src, m); + + if (n) { + 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); + } +} +EXPORT_SYMBOL(sof_block_write); + +void sof_block_read(struct snd_sof_dev *sdev, u32 offset, void *dest, + size_t size) +{ + void __iomem *src = sdev->bar[sdev->mmio_bar] + offset; + + memcpy_fromio(dest, src, size); +} +EXPORT_SYMBOL(sof_block_read);