Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 Cadence Design Systems Inc.
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*
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* Author: Boris Brezillon <boris.brezillon@bootlin.com>
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*/
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#ifndef I3C_INTERNALS_H
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#define I3C_INTERNALS_H
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#include <linux/i3c/master.h>
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#include <linux/io.h>
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void i3c_bus_normaluse_lock(struct i3c_bus *bus);
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void i3c_bus_normaluse_unlock(struct i3c_bus *bus);
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int i3c_dev_setdasa_locked(struct i3c_dev_desc *dev);
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int i3c_dev_do_xfers_locked(struct i3c_dev_desc *dev,
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struct i3c_xfer *xfers,
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int nxfers, enum i3c_xfer_mode mode);
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int i3c_dev_disable_ibi_locked(struct i3c_dev_desc *dev);
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int i3c_dev_enable_ibi_locked(struct i3c_dev_desc *dev);
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int i3c_dev_request_ibi_locked(struct i3c_dev_desc *dev,
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const struct i3c_ibi_setup *req);
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void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev);
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/**
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* i3c_writel_fifo - Write data buffer to 32bit FIFO
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* @addr: FIFO Address to write to
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* @buf: Pointer to the data bytes to write
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* @nbytes: Number of bytes to write
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*/
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static inline void i3c_writel_fifo(void __iomem *addr, const void *buf,
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int nbytes)
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{
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writesl(addr, buf, nbytes / 4);
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if (nbytes & 3) {
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u32 tmp = 0;
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memcpy(&tmp, buf + (nbytes & ~3), nbytes & 3);
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/*
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* writesl() instead of writel() to keep FIFO
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* byteorder on big-endian targets
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*/
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writesl(addr, &tmp, 1);
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}
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}
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/**
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* i3c_readl_fifo - Read data buffer from 32bit FIFO
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* @addr: FIFO Address to read from
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* @buf: Pointer to the buffer to store read bytes
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* @nbytes: Number of bytes to read
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*/
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static inline void i3c_readl_fifo(const void __iomem *addr, void *buf,
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int nbytes)
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{
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readsl(addr, buf, nbytes / 4);
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if (nbytes & 3) {
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u32 tmp;
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/*
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* readsl() instead of readl() to keep FIFO
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* byteorder on big-endian targets
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*/
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readsl(addr, &tmp, 1);
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memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3);
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}
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}
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#endif /* I3C_INTERNAL_H */
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