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 | 112 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 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..2ac4c3da0320 --- /dev/null +++ b/sound/soc/sof/utils.c @@ -0,0 +1,112 @@ +// 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-64-nonatomic-lo-hi.h> +#include <linux/platform_device.h> +#include <sound/soc.h> +#include <sound/sof.h> +#include "sof-priv.h" + +/* + * Register IO + * + * The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops + * structures and cannot be inlined. + */ + +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) +{ + writeq(value, addr); +} +EXPORT_SYMBOL(sof_io_write64); + +u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr) +{ + return readq(addr); +} +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 bar, u32 offset, void *src, + size_t size) +{ + void __iomem *dest = sdev->bar[bar] + offset; + const u8 *src_byte = src; + u32 affected_mask; + u32 tmp; + 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 + */ + tmp = ioread32(dest + m * 4); + tmp &= ~affected_mask; + + tmp |= *(u32 *)(src_byte + m * 4) & affected_mask; + iowrite32(tmp, dest + m * 4); + } +} +EXPORT_SYMBOL(sof_block_write); + +void sof_block_read(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *dest, + size_t size) +{ + void __iomem *src = sdev->bar[bar] + offset; + + memcpy_fromio(dest, src, size); +} +EXPORT_SYMBOL(sof_block_read);