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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2014 Imagination Technologies Ltd.
*/
#ifndef __ASM_CDMM_H
#define __ASM_CDMM_H
#include <linux/device.h>
#include <linux/mod_devicetable.h>
/**
* struct mips_cdmm_device - Represents a single device on a CDMM bus.
* @dev: Driver model device object.
* @cpu: CPU which can access this device.
* @res: MMIO resource.
* @type: Device type identifier.
* @rev: Device revision number.
*/
struct mips_cdmm_device {
struct device dev;
unsigned int cpu;
struct resource res;
unsigned int type;
unsigned int rev;
};
/**
* struct mips_cdmm_driver - Represents a driver for a CDMM device.
* @drv: Driver model driver object.
* @probe Callback for probing newly discovered devices.
* @remove: Callback to remove the device.
* @shutdown: Callback on system shutdown.
* @cpu_down: Callback when the parent CPU is going down.
* Any CPU pinned threads/timers should be disabled.
* @cpu_up: Callback when the parent CPU is coming back up again.
* CPU pinned threads/timers can be restarted.
* @id_table: Table for CDMM IDs to match against.
*/
struct mips_cdmm_driver {
struct device_driver drv;
int (*probe)(struct mips_cdmm_device *);
int (*remove)(struct mips_cdmm_device *);
void (*shutdown)(struct mips_cdmm_device *);
int (*cpu_down)(struct mips_cdmm_device *);
int (*cpu_up)(struct mips_cdmm_device *);
const struct mips_cdmm_device_id *id_table;
};
/**
* mips_cdmm_phys_base() - Choose a physical base address for CDMM region.
*
* Picking a suitable physical address at which to map the CDMM region is
* platform specific, so this function can be defined by platform code to
* pick a suitable value if none is configured by the bootloader.
*
* This address must be 32kB aligned, and the region occupies a maximum of 32kB
* of physical address space which must not be used for anything else.
*
* Returns: Physical base address for CDMM region, or 0 on failure.
*/
phys_addr_t mips_cdmm_phys_base(void);
extern struct bus_type mips_cdmm_bustype;
void __iomem *mips_cdmm_early_probe(unsigned int dev_type);
#define to_mips_cdmm_device(d) container_of(d, struct mips_cdmm_device, dev)
#define mips_cdmm_get_drvdata(d) dev_get_drvdata(&d->dev)
#define mips_cdmm_set_drvdata(d, p) dev_set_drvdata(&d->dev, p)
int mips_cdmm_driver_register(struct mips_cdmm_driver *);
void mips_cdmm_driver_unregister(struct mips_cdmm_driver *);
/*
* module_mips_cdmm_driver() - Helper macro for drivers that don't do
* anything special in module init/exit. This eliminates a lot of
* boilerplate. Each module may only use this macro once, and
* calling it replaces module_init() and module_exit()
*/
#define module_mips_cdmm_driver(__mips_cdmm_driver) \
module_driver(__mips_cdmm_driver, mips_cdmm_driver_register, \
mips_cdmm_driver_unregister)
/*
* builtin_mips_cdmm_driver() - Helper macro for drivers that don't do anything
* special in init and have no exit. This eliminates some boilerplate. Each
* driver may only use this macro once, and calling it replaces device_initcall
* (or in some cases, the legacy __initcall). This is meant to be a direct
* parallel of module_mips_cdmm_driver() above but without the __exit stuff that
* is not used for builtin cases.
*/
#define builtin_mips_cdmm_driver(__mips_cdmm_driver) \
builtin_driver(__mips_cdmm_driver, mips_cdmm_driver_register)
/* drivers/tty/mips_ejtag_fdc.c */
#ifdef CONFIG_MIPS_EJTAG_FDC_EARLYCON
int setup_early_fdc_console(void);
#else
static inline int setup_early_fdc_console(void)
{
return -ENODEV;
}
#endif
#endif /* __ASM_CDMM_H */
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