mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/*
|
|
* Copyright © 2000 Red Hat UK Limited
|
|
* Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#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_RESETING,
|
|
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;
|
|
|
|
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__ */
|