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| -rw-r--r-- | arch/mips/include/asm/cdmm.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cdmm.h b/arch/mips/include/asm/cdmm.h new file mode 100644 index 000000000..c06dbf8ba --- /dev/null +++ b/arch/mips/include/asm/cdmm.h @@ -0,0 +1,109 @@ +/* + * 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 */ |