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| /* SPDX-License-Identifier: GPL-2.0-or-later */
| /*
| * Copyright © 2000 Red Hat UK Limited
| * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
| */
|
| #ifndef __MTD_FLASHCHIP_H__
| #define __MTD_FLASHCHIP_H__
|
| /* For spinlocks. sched.h includes spinlock.h from whichever directory it
| * happens to be in - so we don't have to care whether we're on 2.2, which
| * has asm/spinlock.h, or 2.4, which has linux/spinlock.h
| */
| #include <linux/sched.h>
| #include <linux/mutex.h>
|
| typedef enum {
| FL_READY,
| FL_STATUS,
| FL_CFI_QUERY,
| FL_JEDEC_QUERY,
| FL_ERASING,
| FL_ERASE_SUSPENDING,
| FL_ERASE_SUSPENDED,
| FL_WRITING,
| FL_WRITING_TO_BUFFER,
| FL_OTP_WRITE,
| FL_WRITE_SUSPENDING,
| FL_WRITE_SUSPENDED,
| FL_PM_SUSPENDED,
| FL_SYNCING,
| FL_UNLOADING,
| FL_LOCKING,
| FL_UNLOCKING,
| FL_POINT,
| FL_XIP_WHILE_ERASING,
| FL_XIP_WHILE_WRITING,
| FL_SHUTDOWN,
| /* These 2 come from nand_state_t, which has been unified here */
| FL_READING,
| FL_CACHEDPRG,
| /* These 4 come from onenand_state_t, which has been unified here */
| FL_RESETTING,
| FL_OTPING,
| FL_PREPARING_ERASE,
| FL_VERIFYING_ERASE,
|
| FL_UNKNOWN
| } flstate_t;
|
|
|
| /* NOTE: confusingly, this can be used to refer to more than one chip at a time,
| if they're interleaved. This can even refer to individual partitions on
| the same physical chip when present. */
|
| struct flchip {
| unsigned long start; /* Offset within the map */
| // unsigned long len;
| /* We omit len for now, because when we group them together
| we insist that they're all of the same size, and the chip size
| is held in the next level up. If we get more versatile later,
| it'll make it a damn sight harder to find which chip we want from
| a given offset, and we'll want to add the per-chip length field
| back in.
| */
| int ref_point_counter;
| flstate_t state;
| flstate_t oldstate;
|
| unsigned int write_suspended:1;
| unsigned int erase_suspended:1;
| unsigned long in_progress_block_addr;
| unsigned long in_progress_block_mask;
|
| struct mutex mutex;
| wait_queue_head_t wq; /* Wait on here when we're waiting for the chip
| to be ready */
| int word_write_time;
| int buffer_write_time;
| int erase_time;
|
| int word_write_time_max;
| int buffer_write_time_max;
| int erase_time_max;
|
| void *priv;
| };
|
| /* This is used to handle contention on write/erase operations
| between partitions of the same physical chip. */
| struct flchip_shared {
| struct mutex lock;
| struct flchip *writing;
| struct flchip *erasing;
| };
|
|
| #endif /* __MTD_FLASHCHIP_H__ */
|
|
