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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#ifndef __LINUX_MTD_HYPERBUS_H__#define __LINUX_MTD_HYPERBUS_H__
#include <linux/mtd/map.h>
/* HyperBus command bits */#define HYPERBUS_RW 0x80 /* R/W# */#define HYPERBUS_RW_WRITE 0#define HYPERBUS_RW_READ 0x80#define HYPERBUS_AS 0x40 /* Address Space */#define HYPERBUS_AS_MEM 0#define HYPERBUS_AS_REG 0x40#define HYPERBUS_BT 0x20 /* Burst Type */#define HYPERBUS_BT_WRAPPED 0#define HYPERBUS_BT_LINEAR 0x20
enum hyperbus_memtype { HYPERFLASH, HYPERRAM,};
/** * struct hyperbus_device - struct representing HyperBus slave device * @map: map_info struct for accessing MMIO HyperBus flash memory * @np: pointer to HyperBus slave device node * @mtd: pointer to MTD struct * @ctlr: pointer to HyperBus controller struct * @memtype: type of memory device: HyperFlash or HyperRAM * @priv: pointer to controller specific per device private data */
struct hyperbus_device { struct map_info map; struct device_node *np; struct mtd_info *mtd; struct hyperbus_ctlr *ctlr; enum hyperbus_memtype memtype; void *priv;};
/** * struct hyperbus_ops - struct representing custom HyperBus operations * @read16: read 16 bit of data from flash in a single burst. Used to read * from non default address space, such as ID/CFI space * @write16: write 16 bit of data to flash in a single burst. Used to * send cmd to flash or write single 16 bit word at a time. * @copy_from: copy data from flash memory * @copy_to: copy data to flash memory * @calibrate: calibrate HyperBus controller */
struct hyperbus_ops { u16 (*read16)(struct hyperbus_device *hbdev, unsigned long addr); void (*write16)(struct hyperbus_device *hbdev, unsigned long addr, u16 val); void (*copy_from)(struct hyperbus_device *hbdev, void *to, unsigned long from, ssize_t len); void (*copy_to)(struct hyperbus_device *dev, unsigned long to, const void *from, ssize_t len); int (*calibrate)(struct hyperbus_device *dev);};
/** * struct hyperbus_ctlr - struct representing HyperBus controller * @dev: pointer to HyperBus controller device * @calibrated: flag to indicate ctlr calibration sequence is complete * @ops: HyperBus controller ops */struct hyperbus_ctlr { struct device *dev; bool calibrated;
const struct hyperbus_ops *ops;};
/** * hyperbus_register_device - probe and register a HyperBus slave memory device * @hbdev: hyperbus_device struct with dev, np and ctlr field populated * * Return: 0 for success, others for failure. */int hyperbus_register_device(struct hyperbus_device *hbdev);
/** * hyperbus_unregister_device - deregister HyperBus slave memory device * @hbdev: hyperbus_device to be unregistered */void hyperbus_unregister_device(struct hyperbus_device *hbdev);
#endif /* __LINUX_MTD_HYPERBUS_H__ */