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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright © 2015 Broadcom Corporation
*/
#ifndef __BRCMNAND_H__
#define __BRCMNAND_H__
#include <linux/types.h>
#include <linux/io.h>
struct platform_device;
struct dev_pm_ops;
struct brcmnand_io_ops;
/* Special register offset constant to intercept a non-MMIO access
* to the flash cache register space. This is intentionally large
* not to overlap with an existing offset.
*/
#define BRCMNAND_NON_MMIO_FC_ADDR 0xffffffff
struct brcmnand_soc {
bool (*ctlrdy_ack)(struct brcmnand_soc *soc);
void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en);
void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare,
bool is_param);
const struct brcmnand_io_ops *ops;
};
struct brcmnand_io_ops {
u32 (*read_reg)(struct brcmnand_soc *soc, u32 offset);
void (*write_reg)(struct brcmnand_soc *soc, u32 val, u32 offset);
};
static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc,
bool is_param)
{
if (soc && soc->prepare_data_bus)
soc->prepare_data_bus(soc, true, is_param);
}
static inline void brcmnand_soc_data_bus_unprepare(struct brcmnand_soc *soc,
bool is_param)
{
if (soc && soc->prepare_data_bus)
soc->prepare_data_bus(soc, false, is_param);
}
static inline u32 brcmnand_readl(void __iomem *addr)
{
/*
* MIPS endianness is configured by boot strap, which also reverses all
* bus endianness (i.e., big-endian CPU + big endian bus ==> native
* endian I/O).
*
* Other architectures (e.g., ARM) either do not support big endian, or
* else leave I/O in little endian mode.
*/
if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
return __raw_readl(addr);
else
return readl_relaxed(addr);
}
static inline void brcmnand_writel(u32 val, void __iomem *addr)
{
/* See brcmnand_readl() comments */
if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
__raw_writel(val, addr);
else
writel_relaxed(val, addr);
}
static inline bool brcmnand_soc_has_ops(struct brcmnand_soc *soc)
{
return soc && soc->ops && soc->ops->read_reg && soc->ops->write_reg;
}
static inline u32 brcmnand_soc_read(struct brcmnand_soc *soc, u32 offset)
{
return soc->ops->read_reg(soc, offset);
}
static inline void brcmnand_soc_write(struct brcmnand_soc *soc, u32 val,
u32 offset)
{
soc->ops->write_reg(soc, val, offset);
}
int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc);
void brcmnand_remove(struct platform_device *pdev);
extern const struct dev_pm_ops brcmnand_pm_ops;
#endif /* __BRCMNAND_H__ */
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