1 /* 2 * Copyright © 2000 Red Hat UK Limited 3 * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 */ 20 21 #ifndef __MTD_FLASHCHIP_H__ 22 #define __MTD_FLASHCHIP_H__ 23 24 /* For spinlocks. sched.h includes spinlock.h from whichever directory it 25 * happens to be in - so we don't have to care whether we're on 2.2, which 26 * has asm/spinlock.h, or 2.4, which has linux/spinlock.h 27 */ 28 #include <linux/sched.h> 29 #include <linux/mutex.h> 30 31 typedef enum { 32 FL_READY, 33 FL_STATUS, 34 FL_CFI_QUERY, 35 FL_JEDEC_QUERY, 36 FL_ERASING, 37 FL_ERASE_SUSPENDING, 38 FL_ERASE_SUSPENDED, 39 FL_WRITING, 40 FL_WRITING_TO_BUFFER, 41 FL_OTP_WRITE, 42 FL_WRITE_SUSPENDING, 43 FL_WRITE_SUSPENDED, 44 FL_PM_SUSPENDED, 45 FL_SYNCING, 46 FL_UNLOADING, 47 FL_LOCKING, 48 FL_UNLOCKING, 49 FL_POINT, 50 FL_XIP_WHILE_ERASING, 51 FL_XIP_WHILE_WRITING, 52 FL_SHUTDOWN, 53 /* These 2 come from nand_state_t, which has been unified here */ 54 FL_READING, 55 FL_CACHEDPRG, 56 /* These 4 come from onenand_state_t, which has been unified here */ 57 FL_RESETING, 58 FL_OTPING, 59 FL_PREPARING_ERASE, 60 FL_VERIFYING_ERASE, 61 62 FL_UNKNOWN 63 } flstate_t; 64 65 66 67 /* NOTE: confusingly, this can be used to refer to more than one chip at a time, 68 if they're interleaved. This can even refer to individual partitions on 69 the same physical chip when present. */ 70 71 struct flchip { 72 unsigned long start; /* Offset within the map */ 73 // unsigned long len; 74 /* We omit len for now, because when we group them together 75 we insist that they're all of the same size, and the chip size 76 is held in the next level up. If we get more versatile later, 77 it'll make it a damn sight harder to find which chip we want from 78 a given offset, and we'll want to add the per-chip length field 79 back in. 80 */ 81 int ref_point_counter; 82 flstate_t state; 83 flstate_t oldstate; 84 85 unsigned int write_suspended:1; 86 unsigned int erase_suspended:1; 87 unsigned long in_progress_block_addr; 88 unsigned long in_progress_block_mask; 89 90 struct mutex mutex; 91 wait_queue_head_t wq; /* Wait on here when we're waiting for the chip 92 to be ready */ 93 int word_write_time; 94 int buffer_write_time; 95 int erase_time; 96 97 int word_write_time_max; 98 int buffer_write_time_max; 99 int erase_time_max; 100 101 void *priv; 102 }; 103 104 /* This is used to handle contention on write/erase operations 105 between partitions of the same physical chip. */ 106 struct flchip_shared { 107 struct mutex lock; 108 struct flchip *writing; 109 struct flchip *erasing; 110 }; 111 112 113 #endif /* __MTD_FLASHCHIP_H__ */ 114