forked from luck/tmp_suning_uos_patched
c4a9f88daf
When we press ctrl-alt-del,kernel_restart_prepare will invoke cfi_intelext_reboot which will set flash to read array mode, but later when device_shutdown is invoked which may put current work queue to sleep and other process may be scheduled to running and programming flash in not FL_READY mode again. So we can't boot up if this flash is used for bootloader. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
|
|
/*
|
|
* struct flchip definition
|
|
*
|
|
* Contains information about the location and state of a given flash device
|
|
*
|
|
* (C) 2000 Red Hat. GPLd.
|
|
*
|
|
* $Id: flashchip.h,v 1.18 2005/11/07 11:14:54 gleixner Exp $
|
|
*
|
|
*/
|
|
|
|
#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>
|
|
|
|
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,
|
|
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;
|
|
|
|
spinlock_t *mutex;
|
|
spinlock_t _spinlock; /* We do it like this because sometimes they'll be shared. */
|
|
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;
|
|
|
|
void *priv;
|
|
};
|
|
|
|
/* This is used to handle contention on write/erase operations
|
|
between partitions of the same physical chip. */
|
|
struct flchip_shared {
|
|
spinlock_t lock;
|
|
struct flchip *writing;
|
|
struct flchip *erasing;
|
|
};
|
|
|
|
|
|
#endif /* __MTD_FLASHCHIP_H__ */
|