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