1 2/* 3 * struct flchip definition 4 * 5 * Contains information about the location and state of a given flash device 6 * 7 * (C) 2000 Red Hat. GPLd. 8 * 9 * $Id: flashchip.h,v 1.1.1.1 2008/10/15 03:27:31 james26_jang Exp $ 10 * 11 */ 12 13#ifndef __MTD_FLASHCHIP_H__ 14#define __MTD_FLASHCHIP_H__ 15 16/* For spinlocks. sched.h includes spinlock.h from whichever directory it 17 * happens to be in - so we don't have to care whether we're on 2.2, which 18 * has asm/spinlock.h, or 2.4, which has linux/spinlock.h 19 */ 20#include <linux/sched.h> 21 22typedef enum { 23 FL_READY, 24 FL_STATUS, 25 FL_CFI_QUERY, 26 FL_JEDEC_QUERY, 27 FL_ERASING, 28 FL_ERASE_SUSPENDING, 29 FL_ERASE_SUSPENDED, 30 FL_WRITING, 31 FL_WRITING_TO_BUFFER, 32 FL_WRITE_SUSPENDING, 33 FL_WRITE_SUSPENDED, 34 FL_PM_SUSPENDED, 35 FL_SYNCING, 36 FL_UNLOADING, 37 FL_LOCKING, 38 FL_UNLOCKING, 39 FL_UNKNOWN 40} flstate_t; 41 42 43 44/* NOTE: confusingly, this can be used to refer to more than one chip at a time, 45 if they're interleaved. */ 46 47struct flchip { 48 unsigned long start; /* Offset within the map */ 49 // unsigned long len; 50 /* We omit len for now, because when we group them together 51 we insist that they're all of the same size, and the chip size 52 is held in the next level up. If we get more versatile later, 53 it'll make it a damn sight harder to find which chip we want from 54 a given offset, and we'll want to add the per-chip length field 55 back in. 56 */ 57 flstate_t state; 58 flstate_t oldstate; 59 spinlock_t *mutex; 60 spinlock_t _spinlock; /* We do it like this because sometimes they'll be shared. */ 61 wait_queue_head_t wq; /* Wait on here when we're waiting for the chip 62 to be ready */ 63 int word_write_time; 64 int buffer_write_time; 65 int erase_time; 66}; 67 68 69 70#endif /* __MTD_FLASHCHIP_H__ */ 71